9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "cds/cdsConfig.hpp"
27 #include "cds/classListParser.hpp"
28 #include "cds/classListWriter.hpp"
29 #include "cds/dynamicArchive.hpp"
30 #include "cds/heapShared.hpp"
31 #include "cds/lambdaFormInvokers.hpp"
32 #include "classfile/classFileStream.hpp"
33 #include "classfile/classLoader.inline.hpp"
34 #include "classfile/classLoaderData.hpp"
35 #include "classfile/classLoaderData.inline.hpp"
36 #include "classfile/classLoadInfo.hpp"
37 #include "classfile/javaAssertions.hpp"
38 #include "classfile/javaClasses.inline.hpp"
39 #include "classfile/moduleEntry.hpp"
40 #include "classfile/modules.hpp"
41 #include "classfile/packageEntry.hpp"
42 #include "classfile/stringTable.hpp"
43 #include "classfile/symbolTable.hpp"
44 #include "classfile/systemDictionary.hpp"
45 #include "classfile/vmClasses.hpp"
46 #include "classfile/vmSymbols.hpp"
47 #include "gc/shared/collectedHeap.inline.hpp"
48 #include "interpreter/bytecode.hpp"
68 #include "prims/jvm_misc.hpp"
69 #include "prims/jvmtiExport.hpp"
70 #include "prims/jvmtiThreadState.inline.hpp"
71 #include "prims/stackwalk.hpp"
72 #include "runtime/arguments.hpp"
73 #include "runtime/atomic.hpp"
74 #include "runtime/continuation.hpp"
75 #include "runtime/globals_extension.hpp"
76 #include "runtime/handles.inline.hpp"
77 #include "runtime/init.hpp"
78 #include "runtime/interfaceSupport.inline.hpp"
79 #include "runtime/deoptimization.hpp"
80 #include "runtime/handshake.hpp"
81 #include "runtime/java.hpp"
82 #include "runtime/javaCalls.hpp"
83 #include "runtime/javaThread.hpp"
84 #include "runtime/jfieldIDWorkaround.hpp"
85 #include "runtime/jniHandles.inline.hpp"
86 #include "runtime/os.inline.hpp"
87 #include "runtime/osThread.hpp"
88 #include "runtime/perfData.hpp"
89 #include "runtime/reflection.hpp"
90 #include "runtime/synchronizer.hpp"
91 #include "runtime/threadIdentifier.hpp"
92 #include "runtime/threadSMR.hpp"
93 #include "runtime/vframe.inline.hpp"
94 #include "runtime/vmOperations.hpp"
95 #include "runtime/vm_version.hpp"
96 #include "services/attachListener.hpp"
97 #include "services/management.hpp"
98 #include "services/threadService.hpp"
99 #include "utilities/checkedCast.hpp"
100 #include "utilities/copy.hpp"
101 #include "utilities/defaultStream.hpp"
102 #include "utilities/dtrace.hpp"
103 #include "utilities/events.hpp"
104 #include "utilities/macros.hpp"
105 #include "utilities/utf8.hpp"
106 #include "utilities/zipLibrary.hpp"
107 #if INCLUDE_CDS
108 #include "classfile/systemDictionaryShared.hpp"
226 if (source_file != nullptr) {
227 log_debug(class, resolve)("%s %s %s:%d (%s)", from, to, source_file, line_number, trace);
228 } else {
229 log_debug(class, resolve)("%s %s (%s)", from, to, trace);
230 }
231 }
232 }
233 }
234
235 void trace_class_resolution(Klass* to_class) {
236 EXCEPTION_MARK;
237 trace_class_resolution_impl(to_class, THREAD);
238 if (HAS_PENDING_EXCEPTION) {
239 CLEAR_PENDING_EXCEPTION;
240 }
241 }
242
243 // java.lang.System //////////////////////////////////////////////////////////////////////
244
245
246 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
247 return os::javaTimeMillis();
248 JVM_END
249
250 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored))
251 return os::javaTimeNanos();
252 JVM_END
253
254 // The function below is actually exposed by jdk.internal.misc.VM and not
255 // java.lang.System, but we choose to keep it here so that it stays next
256 // to JVM_CurrentTimeMillis and JVM_NanoTime
257
258 const jlong MAX_DIFF_SECS = CONST64(0x0100000000); // 2^32
259 const jlong MIN_DIFF_SECS = -MAX_DIFF_SECS; // -2^32
260
261 JVM_LEAF(jlong, JVM_GetNanoTimeAdjustment(JNIEnv *env, jclass ignored, jlong offset_secs))
262 jlong seconds;
263 jlong nanos;
264
265 os::javaTimeSystemUTC(seconds, nanos);
266
267 // We're going to verify that the result can fit in a long.
268 // For that we need the difference in seconds between 'seconds'
269 // and 'offset_secs' to be such that:
270 // |seconds - offset_secs| < (2^63/10^9)
271 // We're going to approximate 10^9 ~< 2^30 (1000^3 ~< 1024^3)
272 // which makes |seconds - offset_secs| < 2^33
273 // and we will prefer +/- 2^32 as the maximum acceptable diff
274 // as 2^32 has a more natural feel than 2^33...
275 //
276 // So if |seconds - offset_secs| >= 2^32 - we return a special
277 // sentinel value (-1) which the caller should take as an
278 // exception value indicating that the offset given to us is
279 // too far from range of the current time - leading to too big
280 // a nano adjustment. The caller is expected to recover by
281 // computing a more accurate offset and calling this method
282 // again. (For the record 2^32 secs is ~136 years, so that
283 // should rarely happen)
284 //
285 jlong diff = seconds - offset_secs;
286 if (diff >= MAX_DIFF_SECS || diff <= MIN_DIFF_SECS) {
287 return -1; // sentinel value: the offset is too far off the target
288 }
289
290 // return the adjustment. If you compute a time by adding
291 // this number of nanoseconds along with the number of seconds
292 // in the offset you should get the current UTC time.
293 return (diff * (jlong)1000000000) + nanos;
294 JVM_END
295
296 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
297 jobject dst, jint dst_pos, jint length))
298 // Check if we have null pointers
299 if (src == nullptr || dst == nullptr) {
300 THROW(vmSymbols::java_lang_NullPointerException());
301 }
302 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
303 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
304 assert(oopDesc::is_oop(s), "JVM_ArrayCopy: src not an oop");
305 assert(oopDesc::is_oop(d), "JVM_ArrayCopy: dst not an oop");
306 // Do copy
307 s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread);
308 JVM_END
309
310
311 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
312 JavaValue r(T_OBJECT);
313 // public synchronized Object put(Object key, Object value);
314 HandleMark hm(THREAD);
315 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK);
316 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != nullptr ? value : ""), CHECK);
317 JavaCalls::call_virtual(&r,
318 props,
319 vmClasses::Properties_klass(),
320 vmSymbols::put_name(),
321 vmSymbols::object_object_object_signature(),
322 key_str,
323 value_str,
324 THREAD);
325 }
326
327
328 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
329
330 /*
331 * Return all of the system properties in a Java String array with alternating
332 * names and values from the jvm SystemProperty.
333 * Which includes some internal and all commandline -D defined properties.
334 */
335 JVM_ENTRY(jobjectArray, JVM_GetProperties(JNIEnv *env))
336 ResourceMark rm(THREAD);
337 HandleMark hm(THREAD);
338 int ndx = 0;
339 int fixedCount = 2;
340
341 SystemProperty* p = Arguments::system_properties();
342 int count = Arguments::PropertyList_count(p);
343
344 // Allocate result String array
345 InstanceKlass* ik = vmClasses::String_klass();
346 objArrayOop r = oopFactory::new_objArray(ik, (count + fixedCount) * 2, CHECK_NULL);
347 objArrayHandle result_h(THREAD, r);
348
349 while (p != nullptr) {
350 const char * key = p->key();
351 if (strcmp(key, "sun.nio.MaxDirectMemorySize") != 0) {
352 const char * value = p->value();
353 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK_NULL);
354 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != nullptr ? value : ""), CHECK_NULL);
355 result_h->obj_at_put(ndx * 2, key_str());
403 Handle key_str = java_lang_String::create_from_platform_dependent_str("sun.management.compiler", CHECK_NULL);
404 Handle value_str = java_lang_String::create_from_platform_dependent_str(compiler_name, CHECK_NULL);
405 result_h->obj_at_put(ndx * 2, key_str());
406 result_h->obj_at_put(ndx * 2 + 1, value_str());
407 ndx++;
408 }
409 }
410
411 return (jobjectArray) JNIHandles::make_local(THREAD, result_h());
412 JVM_END
413
414
415 /*
416 * Return the temporary directory that the VM uses for the attach
417 * and perf data files.
418 *
419 * It is important that this directory is well-known and the
420 * same for all VM instances. It cannot be affected by configuration
421 * variables such as java.io.tmpdir.
422 */
423 JVM_ENTRY(jstring, JVM_GetTemporaryDirectory(JNIEnv *env))
424 HandleMark hm(THREAD);
425 const char* temp_dir = os::get_temp_directory();
426 Handle h = java_lang_String::create_from_platform_dependent_str(temp_dir, CHECK_NULL);
427 return (jstring) JNIHandles::make_local(THREAD, h());
428 JVM_END
429
430
431 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
432
433 extern volatile jint vm_created;
434
435 JVM_ENTRY_NO_ENV(void, JVM_BeforeHalt())
436 EventShutdown event;
437 if (event.should_commit()) {
438 event.set_reason("Shutdown requested from Java");
439 event.commit();
440 }
441 JVM_END
442
443
444 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code))
445 before_exit(thread, true);
446 vm_exit(code);
447 JVM_END
448
449
450 JVM_ENTRY_NO_ENV(void, JVM_GC(void))
451 if (!DisableExplicitGC) {
452 EventSystemGC event;
453 event.set_invokedConcurrent(ExplicitGCInvokesConcurrent);
454 Universe::heap()->collect(GCCause::_java_lang_system_gc);
455 event.commit();
456 }
457 JVM_END
458
459
460 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void))
461 return Universe::heap()->millis_since_last_whole_heap_examined();
462 JVM_END
463
464
465 static inline jlong convert_size_t_to_jlong(size_t val) {
466 // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
467 NOT_LP64 (return (jlong)val;)
468 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
469 }
470
471 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void))
472 size_t n = Universe::heap()->capacity();
473 return convert_size_t_to_jlong(n);
474 JVM_END
475
476
477 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void))
478 size_t n = Universe::heap()->unused();
479 return convert_size_t_to_jlong(n);
480 JVM_END
481
482
483 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void))
484 size_t n = Universe::heap()->max_capacity();
485 return convert_size_t_to_jlong(n);
486 JVM_END
487
488
489 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void))
490 return os::active_processor_count();
491 JVM_END
492
493 JVM_LEAF(jboolean, JVM_IsUseContainerSupport(void))
494 #ifdef LINUX
495 if (UseContainerSupport) {
496 return JNI_TRUE;
497 }
498 #endif
499 return JNI_FALSE;
500 JVM_END
501
502 JVM_LEAF(jboolean, JVM_IsContainerized(void))
503 #ifdef LINUX
504 if (OSContainer::is_containerized()) {
505 return JNI_TRUE;
506 }
507 #endif
508 return JNI_FALSE;
509 JVM_END
510
511 // java.lang.Throwable //////////////////////////////////////////////////////
512
513 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
514 Handle exception(thread, JNIHandles::resolve_non_null(receiver));
515 java_lang_Throwable::fill_in_stack_trace(exception);
516 JVM_END
517
518 // java.lang.NullPointerException ///////////////////////////////////////////
519
520 JVM_ENTRY(jstring, JVM_GetExtendedNPEMessage(JNIEnv *env, jthrowable throwable))
521 if (!ShowCodeDetailsInExceptionMessages) return nullptr;
522
523 oop exc = JNIHandles::resolve_non_null(throwable);
524
525 Method* method;
526 int bci;
527 if (!java_lang_Throwable::get_top_method_and_bci(exc, &method, &bci)) {
528 return nullptr;
529 }
530 if (method->is_native()) {
531 return nullptr;
532 }
533
534 stringStream ss;
535 bool ok = BytecodeUtils::get_NPE_message_at(&ss, method, bci);
536 if (ok) {
537 oop result = java_lang_String::create_oop_from_str(ss.base(), CHECK_NULL);
538 return (jstring) JNIHandles::make_local(THREAD, result);
539 } else {
540 return nullptr;
541 }
542 JVM_END
543
544 // java.lang.StackTraceElement //////////////////////////////////////////////
545
546
547 JVM_ENTRY(void, JVM_InitStackTraceElementArray(JNIEnv *env, jobjectArray elements, jobject backtrace, jint depth))
548 Handle backtraceh(THREAD, JNIHandles::resolve(backtrace));
549 objArrayOop st = objArrayOop(JNIHandles::resolve(elements));
550 objArrayHandle stack_trace(THREAD, st);
551 // Fill in the allocated stack trace
552 java_lang_Throwable::get_stack_trace_elements(depth, backtraceh, stack_trace, CHECK);
553 JVM_END
554
555
556 JVM_ENTRY(void, JVM_InitStackTraceElement(JNIEnv* env, jobject element, jobject stackFrameInfo))
557 Handle stack_frame_info(THREAD, JNIHandles::resolve_non_null(stackFrameInfo));
558 Handle stack_trace_element(THREAD, JNIHandles::resolve_non_null(element));
559 java_lang_StackFrameInfo::to_stack_trace_element(stack_frame_info, stack_trace_element, CHECK);
560 JVM_END
561
562
563 // java.lang.StackWalker //////////////////////////////////////////////////////
564 JVM_ENTRY(void, JVM_ExpandStackFrameInfo(JNIEnv *env, jobject obj))
565 Handle stack_frame_info(THREAD, JNIHandles::resolve_non_null(obj));
566
567 bool have_name = (java_lang_StackFrameInfo::name(stack_frame_info()) != nullptr);
568 bool have_type = (java_lang_StackFrameInfo::type(stack_frame_info()) != nullptr);
569 Method* method = java_lang_StackFrameInfo::get_method(stack_frame_info());
570 if (!have_name) {
571 oop name = StringTable::intern(method->name(), CHECK);
572 java_lang_StackFrameInfo::set_name(stack_frame_info(), name);
573 }
574 if (!have_type) {
575 Handle type = java_lang_String::create_from_symbol(method->signature(), CHECK);
576 java_lang_StackFrameInfo::set_type(stack_frame_info(), type());
577 }
578 JVM_END
579
580 JVM_ENTRY(jobject, JVM_CallStackWalk(JNIEnv *env, jobject stackStream, jint mode,
581 jint skip_frames, jobject contScope, jobject cont,
582 jint buffer_size, jint start_index, jobjectArray frames))
583 if (!thread->has_last_Java_frame()) {
584 THROW_MSG_(vmSymbols::java_lang_InternalError(), "doStackWalk: no stack trace", nullptr);
585 }
586
587 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
588 Handle contScope_h(THREAD, JNIHandles::resolve(contScope));
589 Handle cont_h(THREAD, JNIHandles::resolve(cont));
590 // frames array is a ClassFrameInfo[] array when only getting caller reference,
591 // and a StackFrameInfo[] array (or derivative) otherwise. It should never
592 // be null.
593 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
594 objArrayHandle frames_array_h(THREAD, fa);
595
596 if (frames_array_h->length() < buffer_size) {
597 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers", nullptr);
598 }
599
600 oop result = StackWalk::walk(stackStream_h, mode, skip_frames, contScope_h, cont_h,
601 buffer_size, start_index, frames_array_h, CHECK_NULL);
602 return JNIHandles::make_local(THREAD, result);
603 JVM_END
604
605
606 JVM_ENTRY(jint, JVM_MoreStackWalk(JNIEnv *env, jobject stackStream, jint mode, jlong anchor,
607 jint last_batch_count, jint buffer_size, jint start_index,
608 jobjectArray frames))
609 // frames array is a ClassFrameInfo[] array when only getting caller reference,
610 // and a StackFrameInfo[] array (or derivative) otherwise. It should never
611 // be null.
612 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
613 objArrayHandle frames_array_h(THREAD, fa);
614
615 if (frames_array_h->length() < buffer_size) {
616 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers");
617 }
618
619 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
620 return StackWalk::fetchNextBatch(stackStream_h, mode, anchor, last_batch_count, buffer_size,
621 start_index, frames_array_h, THREAD);
622 JVM_END
623
624 JVM_ENTRY(void, JVM_SetStackWalkContinuation(JNIEnv *env, jobject stackStream, jlong anchor, jobjectArray frames, jobject cont))
625 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
626 objArrayHandle frames_array_h(THREAD, fa);
627 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
628 Handle cont_h(THREAD, JNIHandles::resolve_non_null(cont));
629
630 StackWalk::setContinuation(stackStream_h, anchor, frames_array_h, cont_h, THREAD);
631 JVM_END
632
633 // java.lang.Object ///////////////////////////////////////////////
634
635
636 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle))
637 // as implemented in the classic virtual machine; return 0 if object is null
638 return handle == nullptr ? 0 :
639 checked_cast<jint>(ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)));
640 JVM_END
641
642
643 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
644 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
645 JavaThreadInObjectWaitState jtiows(thread, ms != 0);
646 if (JvmtiExport::should_post_monitor_wait()) {
647 JvmtiExport::post_monitor_wait(thread, obj(), ms);
648
649 // The current thread already owns the monitor and it has not yet
650 // been added to the wait queue so the current thread cannot be
651 // made the successor. This means that the JVMTI_EVENT_MONITOR_WAIT
652 // event handler cannot accidentally consume an unpark() meant for
653 // the ParkEvent associated with this ObjectMonitor.
654 }
655 ObjectSynchronizer::wait(obj, ms, CHECK);
656 JVM_END
657
658
659 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
660 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
661 ObjectSynchronizer::notify(obj, CHECK);
662 JVM_END
663
664
665 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
666 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
667 ObjectSynchronizer::notifyall(obj, CHECK);
668 JVM_END
669
670
671 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle))
672 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
673 Klass* klass = obj->klass();
674 JvmtiVMObjectAllocEventCollector oam;
675
676 #ifdef ASSERT
677 // Just checking that the cloneable flag is set correct
678 if (obj->is_array()) {
679 guarantee(klass->is_cloneable(), "all arrays are cloneable");
680 } else {
681 guarantee(obj->is_instance(), "should be instanceOop");
682 bool cloneable = klass->is_subtype_of(vmClasses::Cloneable_klass());
683 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
684 }
685 #endif
686
687 // Check if class of obj supports the Cloneable interface.
688 // All arrays are considered to be cloneable (See JLS 20.1.5).
689 // All j.l.r.Reference classes are considered non-cloneable.
690 if (!klass->is_cloneable() ||
691 (klass->is_instance_klass() &&
704 } else {
705 new_obj_oop = Universe::heap()->obj_allocate(klass, size, CHECK_NULL);
706 }
707
708 HeapAccess<>::clone(obj(), new_obj_oop, size);
709
710 Handle new_obj(THREAD, new_obj_oop);
711 // Caution: this involves a java upcall, so the clone should be
712 // "gc-robust" by this stage.
713 if (klass->has_finalizer()) {
714 assert(obj->is_instance(), "should be instanceOop");
715 new_obj_oop = InstanceKlass::register_finalizer(instanceOop(new_obj()), CHECK_NULL);
716 new_obj = Handle(THREAD, new_obj_oop);
717 }
718
719 return JNIHandles::make_local(THREAD, new_obj());
720 JVM_END
721
722 // java.lang.ref.Finalizer ////////////////////////////////////////////////////
723
724 JVM_ENTRY(void, JVM_ReportFinalizationComplete(JNIEnv * env, jobject finalizee))
725 MANAGEMENT_ONLY(FinalizerService::on_complete(JNIHandles::resolve_non_null(finalizee), THREAD);)
726 JVM_END
727
728 JVM_LEAF(jboolean, JVM_IsFinalizationEnabled(JNIEnv * env))
729 return InstanceKlass::is_finalization_enabled();
730 JVM_END
731
732 // jdk.internal.vm.Continuation /////////////////////////////////////////////////////
733
734 JVM_ENTRY(void, JVM_RegisterContinuationMethods(JNIEnv *env, jclass cls))
735 CONT_RegisterNativeMethods(env, cls);
736 JVM_END
737
738 // java.io.File ///////////////////////////////////////////////////////////////
739
740 JVM_LEAF(char*, JVM_NativePath(char* path))
741 return os::native_path(path);
742 JVM_END
743
744
745 // Misc. class handling ///////////////////////////////////////////////////////////
746
747
748 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env))
749 // Getting the class of the caller frame.
750 //
751 // The call stack at this point looks something like this:
752 //
753 // [0] [ @CallerSensitive public jdk.internal.reflect.Reflection.getCallerClass ]
754 // [1] [ @CallerSensitive API.method ]
755 // [.] [ (skipped intermediate frames) ]
756 // [n] [ caller ]
757 vframeStream vfst(thread);
758 // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass
759 for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) {
760 Method* m = vfst.method();
761 assert(m != nullptr, "sanity");
762 switch (n) {
763 case 0:
764 // This must only be called from Reflection.getCallerClass
765 if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) {
766 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass");
767 }
768 // fall-through
769 case 1:
770 // Frame 0 and 1 must be caller sensitive.
771 if (!m->caller_sensitive()) {
772 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n));
773 }
774 break;
775 default:
776 if (!m->is_ignored_by_security_stack_walk()) {
777 // We have reached the desired frame; return the holder class.
778 return (jclass) JNIHandles::make_local(THREAD, m->method_holder()->java_mirror());
779 }
780 break;
781 }
782 }
783 return nullptr;
784 JVM_END
785
786
787 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
788 oop mirror = nullptr;
789 BasicType t = name2type(utf);
790 if (t != T_ILLEGAL && !is_reference_type(t)) {
791 mirror = Universe::java_mirror(t);
792 }
793 if (mirror == nullptr) {
794 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
795 } else {
796 return (jclass) JNIHandles::make_local(THREAD, mirror);
797 }
798 JVM_END
799
800
801 // Returns a class loaded by the bootstrap class loader; or null
802 // if not found. ClassNotFoundException is not thrown.
803 // FindClassFromBootLoader is exported to the launcher for windows.
804 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
805 const char* name))
806 // Java libraries should ensure that name is never null or illegal.
807 if (name == nullptr || (int)strlen(name) > Symbol::max_length()) {
808 // It's impossible to create this class; the name cannot fit
809 // into the constant pool.
810 return nullptr;
811 }
812 assert(UTF8::is_legal_utf8((const unsigned char*)name, (int)strlen(name), false), "illegal UTF name");
813
814 TempNewSymbol h_name = SymbolTable::new_symbol(name);
815 Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
816 if (k == nullptr) {
817 return nullptr;
818 }
819
820 if (log_is_enabled(Debug, class, resolve)) {
821 trace_class_resolution(k);
822 }
823 return (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
824 JVM_END
825
826 // Find a class with this name in this loader, using the caller's protection domain.
827 JVM_ENTRY(jclass, JVM_FindClassFromCaller(JNIEnv* env, const char* name,
828 jboolean init, jobject loader,
829 jclass caller))
830 TempNewSymbol h_name =
831 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_ClassNotFoundException(),
832 CHECK_NULL);
833
834 oop loader_oop = JNIHandles::resolve(loader);
835 oop from_class = JNIHandles::resolve(caller);
836 oop protection_domain = nullptr;
837 // If loader is null, shouldn't call ClassLoader.checkPackageAccess; otherwise get
838 // NPE. Put it in another way, the bootstrap class loader has all permission and
839 // thus no checkPackageAccess equivalence in the VM class loader.
840 // The caller is also passed as null by the java code if there is no security
841 // manager to avoid the performance cost of getting the calling class.
842 if (from_class != nullptr && loader_oop != nullptr) {
843 protection_domain = java_lang_Class::as_Klass(from_class)->protection_domain();
844 }
845
846 Handle h_loader(THREAD, loader_oop);
847 Handle h_prot(THREAD, protection_domain);
848 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
849 h_prot, false, THREAD);
850
851 if (log_is_enabled(Debug, class, resolve) && result != nullptr) {
852 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
853 }
854 return result;
855 JVM_END
856
857 // Currently only called from the old verifier.
858 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
859 jboolean init, jclass from))
860 TempNewSymbol h_name =
861 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_ClassNotFoundException(),
862 CHECK_NULL);
863 oop from_class_oop = JNIHandles::resolve(from);
864 Klass* from_class = (from_class_oop == nullptr)
865 ? (Klass*)nullptr
866 : java_lang_Class::as_Klass(from_class_oop);
867 oop class_loader = nullptr;
868 oop protection_domain = nullptr;
869 if (from_class != nullptr) {
870 class_loader = from_class->class_loader();
871 protection_domain = from_class->protection_domain();
872 }
873 Handle h_loader(THREAD, class_loader);
874 Handle h_prot (THREAD, protection_domain);
875 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
876 h_prot, true, thread);
877
878 if (log_is_enabled(Debug, class, resolve) && result != nullptr) {
879 // this function is generally only used for class loading during verification.
1042 ik->external_name(),
1043 host_class->external_name(),
1044 ik->is_hidden() ? "is hidden" : "is not hidden");
1045 }
1046 }
1047
1048 if ((!is_hidden || is_nestmate) && !Reflection::is_same_class_package(lookup_k, ik)) {
1049 // non-hidden class or nestmate class must be in the same package as the Lookup class
1050 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Lookup class and defined class are in different packages");
1051 }
1052
1053 if (init) {
1054 ik->initialize(CHECK_NULL);
1055 } else {
1056 ik->link_class(CHECK_NULL);
1057 }
1058
1059 return (jclass) JNIHandles::make_local(THREAD, ik->java_mirror());
1060 }
1061
1062 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
1063 return jvm_define_class_common(name, loader, buf, len, pd, nullptr, THREAD);
1064 JVM_END
1065
1066 /*
1067 * Define a class with the specified lookup class.
1068 * lookup: Lookup class
1069 * name: the name of the class
1070 * buf: class bytes
1071 * len: length of class bytes
1072 * pd: protection domain
1073 * init: initialize the class
1074 * flags: properties of the class
1075 * classData: private static pre-initialized field
1076 */
1077 JVM_ENTRY(jclass, JVM_LookupDefineClass(JNIEnv *env, jclass lookup, const char *name, const jbyte *buf,
1078 jsize len, jobject pd, jboolean initialize, int flags, jobject classData))
1079
1080 if (lookup == nullptr) {
1081 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Lookup class is null");
1082 }
1083
1084 assert(buf != nullptr, "buf must not be null");
1085
1086 return jvm_lookup_define_class(lookup, name, buf, len, pd, initialize, flags, classData, THREAD);
1087 JVM_END
1088
1089 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
1090
1091 return jvm_define_class_common(name, loader, buf, len, pd, source, THREAD);
1092 JVM_END
1093
1094 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
1095 ResourceMark rm(THREAD);
1096
1097 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
1098 char* str = java_lang_String::as_utf8_string(h_name());
1099
1100 // Sanity check, don't expect null
1101 if (str == nullptr) return nullptr;
1102
1103 // Internalize the string, converting '.' to '/' in string.
1104 char* p = (char*)str;
1105 while (*p != '\0') {
1106 if (*p == '.') {
1107 *p = '/';
1108 }
1109 p++;
1110 }
1111
1112 const int str_len = (int)(p - str);
1113 if (str_len > Symbol::max_length()) {
1114 // It's impossible to create this class; the name cannot fit
1120 // Security Note:
1121 // The Java level wrapper will perform the necessary security check allowing
1122 // us to pass the null as the initiating class loader.
1123 Handle h_loader(THREAD, JNIHandles::resolve(loader));
1124 Klass* k = SystemDictionary::find_instance_or_array_klass(THREAD, klass_name,
1125 h_loader,
1126 Handle());
1127 #if INCLUDE_CDS
1128 if (k == nullptr) {
1129 // If the class is not already loaded, try to see if it's in the shared
1130 // archive for the current classloader (h_loader).
1131 k = SystemDictionaryShared::find_or_load_shared_class(klass_name, h_loader, CHECK_NULL);
1132 }
1133 #endif
1134 return (k == nullptr) ? nullptr :
1135 (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
1136 JVM_END
1137
1138 // Module support //////////////////////////////////////////////////////////////////////////////
1139
1140 JVM_ENTRY(void, JVM_DefineModule(JNIEnv *env, jobject module, jboolean is_open, jstring version,
1141 jstring location, jobjectArray packages))
1142 Handle h_module (THREAD, JNIHandles::resolve(module));
1143 Modules::define_module(h_module, is_open, version, location, packages, CHECK);
1144 JVM_END
1145
1146 JVM_ENTRY(void, JVM_SetBootLoaderUnnamedModule(JNIEnv *env, jobject module))
1147 Handle h_module (THREAD, JNIHandles::resolve(module));
1148 Modules::set_bootloader_unnamed_module(h_module, CHECK);
1149 JVM_END
1150
1151 JVM_ENTRY(void, JVM_AddModuleExports(JNIEnv *env, jobject from_module, jstring package, jobject to_module))
1152 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1153 Handle h_to_module (THREAD, JNIHandles::resolve(to_module));
1154 Modules::add_module_exports_qualified(h_from_module, package, h_to_module, CHECK);
1155 JVM_END
1156
1157 JVM_ENTRY(void, JVM_AddModuleExportsToAllUnnamed(JNIEnv *env, jobject from_module, jstring package))
1158 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1159 Modules::add_module_exports_to_all_unnamed(h_from_module, package, CHECK);
1160 JVM_END
1161
1162 JVM_ENTRY(void, JVM_AddModuleExportsToAll(JNIEnv *env, jobject from_module, jstring package))
1163 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1164 Modules::add_module_exports(h_from_module, package, Handle(), CHECK);
1165 JVM_END
1166
1167 JVM_ENTRY (void, JVM_AddReadsModule(JNIEnv *env, jobject from_module, jobject source_module))
1168 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1169 Handle h_source_module (THREAD, JNIHandles::resolve(source_module));
1170 Modules::add_reads_module(h_from_module, h_source_module, CHECK);
1171 JVM_END
1172
1173 JVM_ENTRY(void, JVM_DefineArchivedModules(JNIEnv *env, jobject platform_loader, jobject system_loader))
1174 Handle h_platform_loader (THREAD, JNIHandles::resolve(platform_loader));
1175 Handle h_system_loader (THREAD, JNIHandles::resolve(system_loader));
1176 Modules::define_archived_modules(h_platform_loader, h_system_loader, CHECK);
1177 JVM_END
1178
1179 // Reflection support //////////////////////////////////////////////////////////////////////////////
1180
1181 JVM_ENTRY(jstring, JVM_InitClassName(JNIEnv *env, jclass cls))
1182 assert (cls != nullptr, "illegal class");
1183 JvmtiVMObjectAllocEventCollector oam;
1184 ResourceMark rm(THREAD);
1185 HandleMark hm(THREAD);
1186 Handle java_class(THREAD, JNIHandles::resolve(cls));
1187 oop result = java_lang_Class::name(java_class, CHECK_NULL);
1188 return (jstring) JNIHandles::make_local(THREAD, result);
1189 JVM_END
1190
1191
1192 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
1193 JvmtiVMObjectAllocEventCollector oam;
1194 oop mirror = JNIHandles::resolve_non_null(cls);
1195
1196 // Special handling for primitive objects
1197 if (java_lang_Class::is_primitive(mirror)) {
1198 // Primitive objects does not have any interfaces
1199 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(), 0, CHECK_NULL);
1200 return (jobjectArray) JNIHandles::make_local(THREAD, r);
1201 }
1202
1203 Klass* klass = java_lang_Class::as_Klass(mirror);
1204 // Figure size of result array
1205 int size;
1206 if (klass->is_instance_klass()) {
1207 size = InstanceKlass::cast(klass)->local_interfaces()->length();
1208 } else {
1209 assert(klass->is_objArray_klass() || klass->is_typeArray_klass(), "Illegal mirror klass");
1210 size = 2;
1211 }
1212
1213 // Allocate result array
1214 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(), size, CHECK_NULL);
1215 objArrayHandle result (THREAD, r);
1216 // Fill in result
1217 if (klass->is_instance_klass()) {
1218 // Regular instance klass, fill in all local interfaces
1219 for (int index = 0; index < size; index++) {
1220 Klass* k = InstanceKlass::cast(klass)->local_interfaces()->at(index);
1221 result->obj_at_put(index, k->java_mirror());
1222 }
1223 } else {
1224 // All arrays implement java.lang.Cloneable and java.io.Serializable
1225 result->obj_at_put(0, vmClasses::Cloneable_klass()->java_mirror());
1226 result->obj_at_put(1, vmClasses::Serializable_klass()->java_mirror());
1227 }
1228 return (jobjectArray) JNIHandles::make_local(THREAD, result());
1229 JVM_END
1230
1231
1232 JVM_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
1233 oop mirror = JNIHandles::resolve_non_null(cls);
1234 if (java_lang_Class::is_primitive(mirror)) {
1235 return JNI_FALSE;
1236 }
1237 Klass* k = java_lang_Class::as_Klass(mirror);
1238 jboolean result = k->is_interface();
1239 assert(!result || k->is_instance_klass(),
1240 "all interfaces are instance types");
1241 // The compiler intrinsic for isInterface tests the
1242 // Klass::_access_flags bits in the same way.
1243 return result;
1244 JVM_END
1245
1246 JVM_ENTRY(jboolean, JVM_IsHiddenClass(JNIEnv *env, jclass cls))
1247 oop mirror = JNIHandles::resolve_non_null(cls);
1248 if (java_lang_Class::is_primitive(mirror)) {
1249 return JNI_FALSE;
1250 }
1251 Klass* k = java_lang_Class::as_Klass(mirror);
1252 return k->is_hidden();
1253 JVM_END
1254
1255 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
1256 JvmtiVMObjectAllocEventCollector oam;
1257 oop mirror = JNIHandles::resolve_non_null(cls);
1258 if (java_lang_Class::is_primitive(mirror)) {
1259 // There are no signers for primitive types
1260 return nullptr;
1261 }
1262
1263 objArrayHandle signers(THREAD, java_lang_Class::signers(mirror));
1264
1265 // If there are no signers set in the class, or if the class
1266 // is an array, return null.
1267 if (signers == nullptr) return nullptr;
1268
1269 // copy of the signers array
1270 Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass();
1271 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1272 for (int index = 0; index < signers->length(); index++) {
1273 signers_copy->obj_at_put(index, signers->obj_at(index));
1274 }
1275
1276 // return the copy
1277 return (jobjectArray) JNIHandles::make_local(THREAD, signers_copy);
1278 JVM_END
1279
1280
1281 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1282 oop mirror = JNIHandles::resolve_non_null(cls);
1283 if (!java_lang_Class::is_primitive(mirror)) {
1284 // This call is ignored for primitive types and arrays.
1285 // Signers are only set once, ClassLoader.java, and thus shouldn't
1286 // be called with an array. Only the bootstrap loader creates arrays.
1287 Klass* k = java_lang_Class::as_Klass(mirror);
1288 if (k->is_instance_klass()) {
1289 java_lang_Class::set_signers(k->java_mirror(), objArrayOop(JNIHandles::resolve(signers)));
1290 }
1291 }
1292 JVM_END
1293
1294
1295 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1296 oop mirror = JNIHandles::resolve_non_null(cls);
1297 if (mirror == nullptr) {
1298 THROW_(vmSymbols::java_lang_NullPointerException(), nullptr);
1299 }
1300
1301 if (java_lang_Class::is_primitive(mirror)) {
1302 // Primitive types does not have a protection domain.
1303 return nullptr;
1304 }
1305
1306 oop pd = java_lang_Class::protection_domain(mirror);
1307 return (jobject) JNIHandles::make_local(THREAD, pd);
1308 JVM_END
1309
1310
1311 // Returns the inherited_access_control_context field of the running thread.
1312 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1313 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1314 return JNIHandles::make_local(THREAD, result);
1315 JVM_END
1316
1317 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1318 if (!UsePrivilegedStack) return nullptr;
1319
1320 ResourceMark rm(THREAD);
1321 GrowableArray<Handle>* local_array = new GrowableArray<Handle>(12);
1322 JvmtiVMObjectAllocEventCollector oam;
1323
1324 // count the protection domains on the execution stack. We collapse
1325 // duplicate consecutive protection domains into a single one, as
1326 // well as stopping when we hit a privileged frame.
1327
1328 oop previous_protection_domain = nullptr;
1329 Handle privileged_context(thread, nullptr);
1330 bool is_privileged = false;
1331 oop protection_domain = nullptr;
1332
1333 // Iterate through Java frames
1334 vframeStream vfst(thread);
1335 for(; !vfst.at_end(); vfst.next()) {
1336 // get method of frame
1337 Method* method = vfst.method();
1381 local_array->length(), CHECK_NULL);
1382 objArrayHandle h_context(thread, context);
1383 for (int index = 0; index < local_array->length(); index++) {
1384 h_context->obj_at_put(index, local_array->at(index)());
1385 }
1386
1387 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1388
1389 return JNIHandles::make_local(THREAD, result);
1390 JVM_END
1391
1392 class ScopedValueBindingsResolver {
1393 public:
1394 InstanceKlass* Carrier_klass;
1395 ScopedValueBindingsResolver(JavaThread* THREAD) {
1396 Klass *k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_ScopedValue_Carrier(), true, THREAD);
1397 Carrier_klass = InstanceKlass::cast(k);
1398 }
1399 };
1400
1401 JVM_ENTRY(jobject, JVM_FindScopedValueBindings(JNIEnv *env, jclass cls))
1402 ResourceMark rm(THREAD);
1403 GrowableArray<Handle>* local_array = new GrowableArray<Handle>(12);
1404 JvmtiVMObjectAllocEventCollector oam;
1405
1406 static ScopedValueBindingsResolver resolver(THREAD);
1407
1408 // Iterate through Java frames
1409 vframeStream vfst(thread);
1410 for(; !vfst.at_end(); vfst.next()) {
1411 int loc = -1;
1412 // get method of frame
1413 Method* method = vfst.method();
1414
1415 Symbol *name = method->name();
1416
1417 InstanceKlass* holder = method->method_holder();
1418 if (name == vmSymbols::runWith_method_name()) {
1419 if (holder == vmClasses::Thread_klass()
1420 || holder == resolver.Carrier_klass) {
1421 loc = 1;
1422 }
1423 }
1424
1425 if (loc != -1) {
1426 javaVFrame *frame = vfst.asJavaVFrame();
1427 StackValueCollection* locals = frame->locals();
1428 StackValue* head_sv = locals->at(loc); // java/lang/ScopedValue$Snapshot
1429 Handle result = head_sv->get_obj();
1430 assert(!head_sv->obj_is_scalar_replaced(), "found scalar-replaced object");
1431 if (result() != nullptr) {
1432 return JNIHandles::make_local(THREAD, result());
1433 }
1434 }
1435 }
1436
1437 return nullptr;
1438 JVM_END
1439
1440 JVM_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1441 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1442 return (k != nullptr) && k->is_array_klass() ? true : false;
1443 JVM_END
1444
1445
1446 JVM_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1447 oop mirror = JNIHandles::resolve_non_null(cls);
1448 return (jboolean) java_lang_Class::is_primitive(mirror);
1449 JVM_END
1450
1451
1452 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1453 oop mirror = JNIHandles::resolve_non_null(cls);
1454 if (java_lang_Class::is_primitive(mirror)) {
1455 // Primitive type
1456 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1457 }
1458
1459 Klass* k = java_lang_Class::as_Klass(mirror);
1460 debug_only(int computed_modifiers = k->compute_modifier_flags());
1461 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1462 return k->modifier_flags();
1463 JVM_END
1464
1465
1466 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1467
1468 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1469 JvmtiVMObjectAllocEventCollector oam;
1470 // ofClass is a reference to a java_lang_Class object. The mirror object
1471 // of an InstanceKlass
1472 oop ofMirror = JNIHandles::resolve_non_null(ofClass);
1473 if (java_lang_Class::is_primitive(ofMirror) ||
1474 ! java_lang_Class::as_Klass(ofMirror)->is_instance_klass()) {
1475 oop result = oopFactory::new_objArray(vmClasses::Class_klass(), 0, CHECK_NULL);
1476 return (jobjectArray)JNIHandles::make_local(THREAD, result);
1477 }
1478
1479 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(ofMirror));
1480 InnerClassesIterator iter(k);
1481
1482 if (iter.length() == 0) {
1483 // Neither an inner nor outer class
1484 oop result = oopFactory::new_objArray(vmClasses::Class_klass(), 0, CHECK_NULL);
1485 return (jobjectArray)JNIHandles::make_local(THREAD, result);
1486 }
1487
1488 // find inner class info
1514 result->obj_at_put(members, inner_klass->java_mirror());
1515 members++;
1516 }
1517 }
1518 }
1519 }
1520
1521 if (members != length) {
1522 // Return array of right length
1523 objArrayOop res = oopFactory::new_objArray(vmClasses::Class_klass(), members, CHECK_NULL);
1524 for(int i = 0; i < members; i++) {
1525 res->obj_at_put(i, result->obj_at(i));
1526 }
1527 return (jobjectArray)JNIHandles::make_local(THREAD, res);
1528 }
1529
1530 return (jobjectArray)JNIHandles::make_local(THREAD, result());
1531 JVM_END
1532
1533
1534 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1535 {
1536 // ofClass is a reference to a java_lang_Class object.
1537 oop ofMirror = JNIHandles::resolve_non_null(ofClass);
1538 if (java_lang_Class::is_primitive(ofMirror)) {
1539 return nullptr;
1540 }
1541 Klass* klass = java_lang_Class::as_Klass(ofMirror);
1542 if (!klass->is_instance_klass()) {
1543 return nullptr;
1544 }
1545
1546 bool inner_is_member = false;
1547 Klass* outer_klass
1548 = InstanceKlass::cast(klass)->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1549 if (outer_klass == nullptr) return nullptr; // already a top-level class
1550 if (!inner_is_member) return nullptr; // a hidden class (inside a method)
1551 return (jclass) JNIHandles::make_local(THREAD, outer_klass->java_mirror());
1552 }
1553 JVM_END
1554
1555 JVM_ENTRY(jstring, JVM_GetSimpleBinaryName(JNIEnv *env, jclass cls))
1556 {
1557 oop mirror = JNIHandles::resolve_non_null(cls);
1558 if (java_lang_Class::is_primitive(mirror)) {
1559 return nullptr;
1560 }
1561 Klass* klass = java_lang_Class::as_Klass(mirror);
1562 if (!klass->is_instance_klass()) {
1563 return nullptr;
1564 }
1565 InstanceKlass* k = InstanceKlass::cast(klass);
1566 int ooff = 0, noff = 0;
1567 if (k->find_inner_classes_attr(&ooff, &noff, THREAD)) {
1568 if (noff != 0) {
1569 constantPoolHandle i_cp(thread, k->constants());
1570 Symbol* name = i_cp->symbol_at(noff);
1571 Handle str = java_lang_String::create_from_symbol(name, CHECK_NULL);
1572 return (jstring) JNIHandles::make_local(THREAD, str());
1573 }
1574 }
1575 return nullptr;
1576 }
1577 JVM_END
1578
1579 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1580 assert (cls != nullptr, "illegal class");
1581 JvmtiVMObjectAllocEventCollector oam;
1582 ResourceMark rm(THREAD);
1583 oop mirror = JNIHandles::resolve_non_null(cls);
1584 // Return null for arrays and primitives
1585 if (!java_lang_Class::is_primitive(mirror)) {
1586 Klass* k = java_lang_Class::as_Klass(mirror);
1587 if (k->is_instance_klass()) {
1588 Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1589 if (sym == nullptr) return nullptr;
1590 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1591 return (jstring) JNIHandles::make_local(THREAD, str());
1592 }
1593 }
1594 return nullptr;
1595 JVM_END
1596
1597
1598 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1599 assert (cls != nullptr, "illegal class");
1600 oop mirror = JNIHandles::resolve_non_null(cls);
1601 // Return null for arrays and primitives
1602 if (!java_lang_Class::is_primitive(mirror)) {
1603 Klass* k = java_lang_Class::as_Klass(mirror);
1604 if (k->is_instance_klass()) {
1605 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1606 return (jbyteArray) JNIHandles::make_local(THREAD, a);
1607 }
1608 }
1609 return nullptr;
1610 JVM_END
1611
1612
1613 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd) {
1614 // some of this code was adapted from from jni_FromReflectedField
1615
1616 oop reflected = JNIHandles::resolve_non_null(field);
1617 oop mirror = java_lang_reflect_Field::clazz(reflected);
1618 Klass* k = java_lang_Class::as_Klass(mirror);
1647 int slot = 0;
1648
1649 if (reflected->klass() == vmClasses::reflect_Constructor_klass()) {
1650 mirror = java_lang_reflect_Constructor::clazz(reflected);
1651 slot = java_lang_reflect_Constructor::slot(reflected);
1652 } else {
1653 assert(reflected->klass() == vmClasses::reflect_Method_klass(),
1654 "wrong type");
1655 mirror = java_lang_reflect_Method::clazz(reflected);
1656 slot = java_lang_reflect_Method::slot(reflected);
1657 }
1658 Klass* k = java_lang_Class::as_Klass(mirror);
1659
1660 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1661 assert(m != nullptr, "cannot find method");
1662 return m; // caller has to deal with null in product mode
1663 }
1664
1665 /* Type use annotations support (JDK 1.8) */
1666
1667 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1668 assert (cls != nullptr, "illegal class");
1669 ResourceMark rm(THREAD);
1670 // Return null for arrays and primitives
1671 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1672 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1673 if (k->is_instance_klass()) {
1674 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1675 if (type_annotations != nullptr) {
1676 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1677 return (jbyteArray) JNIHandles::make_local(THREAD, a);
1678 }
1679 }
1680 }
1681 return nullptr;
1682 JVM_END
1683
1684 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1685 assert (method != nullptr, "illegal method");
1686 // method is a handle to a java.lang.reflect.Method object
1687 Method* m = jvm_get_method_common(method);
1688 if (m == nullptr) {
1689 return nullptr;
1690 }
1691
1692 AnnotationArray* type_annotations = m->type_annotations();
1693 if (type_annotations != nullptr) {
1694 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1695 return (jbyteArray) JNIHandles::make_local(THREAD, a);
1696 }
1697
1698 return nullptr;
1699 JVM_END
1700
1701 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1702 assert (field != nullptr, "illegal field");
1703 fieldDescriptor fd;
1704 bool gotFd = jvm_get_field_common(field, fd);
1705 if (!gotFd) {
1706 return nullptr;
1707 }
1708
1709 return (jbyteArray) JNIHandles::make_local(THREAD, Annotations::make_java_array(fd.type_annotations(), THREAD));
1710 JVM_END
1711
1712 static void bounds_check(const constantPoolHandle& cp, jint index, TRAPS) {
1713 if (!cp->is_within_bounds(index)) {
1714 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1715 }
1716 }
1717
1718 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1719 {
1720 // method is a handle to a java.lang.reflect.Method object
1721 Method* method_ptr = jvm_get_method_common(method);
1722 methodHandle mh (THREAD, method_ptr);
1723 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1724 const int num_params = mh->method_parameters_length();
1725
1726 if (num_params < 0) {
1727 // A -1 return value from method_parameters_length means there is no
1728 // parameter data. Return null to indicate this to the reflection
1729 // API.
1730 assert(num_params == -1, "num_params should be -1 if it is less than zero");
1731 return (jobjectArray)nullptr;
1732 } else {
1733 // Otherwise, we return something up to reflection, even if it is
1734 // a zero-length array. Why? Because in some cases this can
1735 // trigger a MalformedParametersException.
1736
1737 // make sure all the symbols are properly formatted
1738 for (int i = 0; i < num_params; i++) {
1751 objArrayOop result_oop = oopFactory::new_objArray(vmClasses::reflect_Parameter_klass(), num_params, CHECK_NULL);
1752 objArrayHandle result (THREAD, result_oop);
1753
1754 for (int i = 0; i < num_params; i++) {
1755 MethodParametersElement* params = mh->method_parameters_start();
1756 // For a 0 index, give a null symbol
1757 Symbol* sym = 0 != params[i].name_cp_index ?
1758 mh->constants()->symbol_at(params[i].name_cp_index) : nullptr;
1759 int flags = params[i].flags;
1760 oop param = Reflection::new_parameter(reflected_method, i, sym,
1761 flags, CHECK_NULL);
1762 result->obj_at_put(i, param);
1763 }
1764 return (jobjectArray)JNIHandles::make_local(THREAD, result());
1765 }
1766 }
1767 JVM_END
1768
1769 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1770
1771 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1772 {
1773 JvmtiVMObjectAllocEventCollector oam;
1774
1775 oop ofMirror = JNIHandles::resolve_non_null(ofClass);
1776 // Exclude primitive types and array types
1777 if (java_lang_Class::is_primitive(ofMirror) ||
1778 java_lang_Class::as_Klass(ofMirror)->is_array_klass()) {
1779 // Return empty array
1780 oop res = oopFactory::new_objArray(vmClasses::reflect_Field_klass(), 0, CHECK_NULL);
1781 return (jobjectArray) JNIHandles::make_local(THREAD, res);
1782 }
1783
1784 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(ofMirror));
1785 constantPoolHandle cp(THREAD, k->constants());
1786
1787 // Ensure class is linked
1788 k->link_class(CHECK_NULL);
1789
1790 // Allocate result
1791 int num_fields;
1802 objArrayOop r = oopFactory::new_objArray(vmClasses::reflect_Field_klass(), num_fields, CHECK_NULL);
1803 objArrayHandle result (THREAD, r);
1804
1805 int out_idx = 0;
1806 fieldDescriptor fd;
1807 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1808 if (!publicOnly || fs.access_flags().is_public()) {
1809 fd.reinitialize(k, fs.index());
1810 oop field = Reflection::new_field(&fd, CHECK_NULL);
1811 result->obj_at_put(out_idx, field);
1812 ++out_idx;
1813 }
1814 }
1815 assert(out_idx == num_fields, "just checking");
1816 return (jobjectArray) JNIHandles::make_local(THREAD, result());
1817 }
1818 JVM_END
1819
1820 // A class is a record if and only if it is final and a direct subclass of
1821 // java.lang.Record and has a Record attribute; otherwise, it is not a record.
1822 JVM_ENTRY(jboolean, JVM_IsRecord(JNIEnv *env, jclass cls))
1823 {
1824 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1825 if (k != nullptr && k->is_instance_klass()) {
1826 InstanceKlass* ik = InstanceKlass::cast(k);
1827 return ik->is_record();
1828 } else {
1829 return false;
1830 }
1831 }
1832 JVM_END
1833
1834 // Returns an array containing the components of the Record attribute,
1835 // or null if the attribute is not present.
1836 //
1837 // Note that this function returns the components of the Record attribute
1838 // even if the class is not a record.
1839 JVM_ENTRY(jobjectArray, JVM_GetRecordComponents(JNIEnv* env, jclass ofClass))
1840 {
1841 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass));
1842 assert(c->is_instance_klass(), "must be");
1843 InstanceKlass* ik = InstanceKlass::cast(c);
1844
1845 Array<RecordComponent*>* components = ik->record_components();
1846 if (components != nullptr) {
1847 JvmtiVMObjectAllocEventCollector oam;
1848 constantPoolHandle cp(THREAD, ik->constants());
1849 int length = components->length();
1850 assert(length >= 0, "unexpected record_components length");
1851 objArrayOop record_components =
1852 oopFactory::new_objArray(vmClasses::RecordComponent_klass(), length, CHECK_NULL);
1853 objArrayHandle components_h (THREAD, record_components);
1854
1855 for (int x = 0; x < length; x++) {
1856 RecordComponent* component = components->at(x);
1857 assert(component != nullptr, "unexpected null record component");
1858 oop component_oop = java_lang_reflect_RecordComponent::create(ik, component, CHECK_NULL);
1859 components_h->obj_at_put(x, component_oop);
1926 for (int i = 0; i < num_methods; i++) {
1927 methodHandle method(THREAD, k->method_with_idnum(idnums->at(i)));
1928 if (method.is_null()) {
1929 // Method may have been deleted and seems this API can handle null
1930 // Otherwise should probably put a method that throws NSME
1931 result->obj_at_put(i, nullptr);
1932 } else {
1933 oop m;
1934 if (want_constructor) {
1935 m = Reflection::new_constructor(method, CHECK_NULL);
1936 } else {
1937 m = Reflection::new_method(method, false, CHECK_NULL);
1938 }
1939 result->obj_at_put(i, m);
1940 }
1941 }
1942
1943 return (jobjectArray) JNIHandles::make_local(THREAD, result());
1944 }
1945
1946 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1947 {
1948 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1949 /*want_constructor*/ false,
1950 vmClasses::reflect_Method_klass(), THREAD);
1951 }
1952 JVM_END
1953
1954 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1955 {
1956 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1957 /*want_constructor*/ true,
1958 vmClasses::reflect_Constructor_klass(), THREAD);
1959 }
1960 JVM_END
1961
1962 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1963 {
1964 oop mirror = JNIHandles::resolve_non_null(cls);
1965 if (java_lang_Class::is_primitive(mirror)) {
1966 // Primitive type
1967 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1968 }
1969
1970 Klass* k = java_lang_Class::as_Klass(mirror);
1971 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1972 }
1973 JVM_END
1974
1975 JVM_ENTRY(jboolean, JVM_AreNestMates(JNIEnv *env, jclass current, jclass member))
1976 {
1977 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1978 assert(c->is_instance_klass(), "must be");
1979 InstanceKlass* ck = InstanceKlass::cast(c);
1980 Klass* m = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(member));
1981 assert(m->is_instance_klass(), "must be");
1982 InstanceKlass* mk = InstanceKlass::cast(m);
1983 return ck->has_nestmate_access_to(mk, THREAD);
1984 }
1985 JVM_END
1986
1987 JVM_ENTRY(jclass, JVM_GetNestHost(JNIEnv* env, jclass current))
1988 {
1989 // current is not a primitive or array class
1990 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1991 assert(c->is_instance_klass(), "must be");
1992 InstanceKlass* ck = InstanceKlass::cast(c);
1993 InstanceKlass* host = ck->nest_host(THREAD);
1994 return (jclass) (host == nullptr ? nullptr :
1995 JNIHandles::make_local(THREAD, host->java_mirror()));
1996 }
1997 JVM_END
1998
1999 JVM_ENTRY(jobjectArray, JVM_GetNestMembers(JNIEnv* env, jclass current))
2000 {
2001 // current is not a primitive or array class
2002 ResourceMark rm(THREAD);
2003 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
2004 assert(c->is_instance_klass(), "must be");
2005 InstanceKlass* ck = InstanceKlass::cast(c);
2006 InstanceKlass* host = ck->nest_host(THREAD);
2007
2008 log_trace(class, nestmates)("Calling GetNestMembers for type %s with nest-host %s",
2009 ck->external_name(), host->external_name());
2010 {
2011 JvmtiVMObjectAllocEventCollector oam;
2012 Array<u2>* members = host->nest_members();
2013 int length = members == nullptr ? 0 : members->length();
2014
2015 log_trace(class, nestmates)(" - host has %d listed nest members", length);
2016
2017 // nest host is first in the array so make it one bigger
2018 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(),
2019 length + 1, CHECK_NULL);
2059 log_trace(class, nestmates)(" - compacting array from length %d to %d",
2060 length + 1, count + 1);
2061
2062 objArrayOop r2 = oopFactory::new_objArray(vmClasses::Class_klass(),
2063 count + 1, CHECK_NULL);
2064 objArrayHandle result2(THREAD, r2);
2065 for (int i = 0; i < count + 1; i++) {
2066 result2->obj_at_put(i, result->obj_at(i));
2067 }
2068 return (jobjectArray)JNIHandles::make_local(THREAD, result2());
2069 }
2070 }
2071 else {
2072 assert(host == ck || ck->is_hidden(), "must be singleton nest or dynamic nestmate");
2073 }
2074 return (jobjectArray)JNIHandles::make_local(THREAD, result());
2075 }
2076 }
2077 JVM_END
2078
2079 JVM_ENTRY(jobjectArray, JVM_GetPermittedSubclasses(JNIEnv* env, jclass current))
2080 {
2081 oop mirror = JNIHandles::resolve_non_null(current);
2082 assert(!java_lang_Class::is_primitive(mirror), "should not be");
2083 Klass* c = java_lang_Class::as_Klass(mirror);
2084 assert(c->is_instance_klass(), "must be");
2085 InstanceKlass* ik = InstanceKlass::cast(c);
2086 ResourceMark rm(THREAD);
2087 log_trace(class, sealed)("Calling GetPermittedSubclasses for %s type %s",
2088 ik->is_sealed() ? "sealed" : "non-sealed", ik->external_name());
2089 if (ik->is_sealed()) {
2090 JvmtiVMObjectAllocEventCollector oam;
2091 Array<u2>* subclasses = ik->permitted_subclasses();
2092 int length = subclasses->length();
2093
2094 log_trace(class, sealed)(" - sealed class has %d permitted subclasses", length);
2095
2096 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(),
2097 length, CHECK_NULL);
2098 objArrayHandle result(THREAD, r);
2099 int count = 0;
2122 }
2123 if (count < length) {
2124 // we had invalid entries so we need to compact the array
2125 objArrayOop r2 = oopFactory::new_objArray(vmClasses::Class_klass(),
2126 count, CHECK_NULL);
2127 objArrayHandle result2(THREAD, r2);
2128 for (int i = 0; i < count; i++) {
2129 result2->obj_at_put(i, result->obj_at(i));
2130 }
2131 return (jobjectArray)JNIHandles::make_local(THREAD, result2());
2132 }
2133 return (jobjectArray)JNIHandles::make_local(THREAD, result());
2134 } else {
2135 return nullptr;
2136 }
2137 }
2138 JVM_END
2139
2140 // Constant pool access //////////////////////////////////////////////////////////
2141
2142 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
2143 {
2144 JvmtiVMObjectAllocEventCollector oam;
2145 oop mirror = JNIHandles::resolve_non_null(cls);
2146 // Return null for primitives and arrays
2147 if (!java_lang_Class::is_primitive(mirror)) {
2148 Klass* k = java_lang_Class::as_Klass(mirror);
2149 if (k->is_instance_klass()) {
2150 InstanceKlass* k_h = InstanceKlass::cast(k);
2151 Handle jcp = reflect_ConstantPool::create(CHECK_NULL);
2152 reflect_ConstantPool::set_cp(jcp(), k_h->constants());
2153 return JNIHandles::make_local(THREAD, jcp());
2154 }
2155 }
2156 return nullptr;
2157 }
2158 JVM_END
2159
2160
2161 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
2162 {
2163 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2164 return cp->length();
2165 }
2166 JVM_END
2167
2168
2169 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2170 {
2171 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2172 bounds_check(cp, index, CHECK_NULL);
2173 constantTag tag = cp->tag_at(index);
2174 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
2175 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2176 }
2177 Klass* k = cp->klass_at(index, CHECK_NULL);
2178 return (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
2179 }
2180 JVM_END
2181
2182 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2183 {
2184 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2185 bounds_check(cp, index, CHECK_NULL);
2186 constantTag tag = cp->tag_at(index);
2187 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
2188 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2189 }
2190 Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
2191 if (k == nullptr) return nullptr;
2192 return (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
2193 }
2194 JVM_END
2195
2196 static jobject get_method_at_helper(const constantPoolHandle& cp, jint index, bool force_resolution, TRAPS) {
2197 constantTag tag = cp->tag_at(index);
2198 if (!tag.is_method() && !tag.is_interface_method()) {
2199 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2200 }
2201 int klass_ref = cp->uncached_klass_ref_index_at(index);
2202 Klass* k_o;
2205 } else {
2206 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2207 if (k_o == nullptr) return nullptr;
2208 }
2209 InstanceKlass* k = InstanceKlass::cast(k_o);
2210 Symbol* name = cp->uncached_name_ref_at(index);
2211 Symbol* sig = cp->uncached_signature_ref_at(index);
2212 methodHandle m (THREAD, k->find_method(name, sig));
2213 if (m.is_null()) {
2214 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
2215 }
2216 oop method;
2217 if (!m->is_initializer() || m->is_static()) {
2218 method = Reflection::new_method(m, true, CHECK_NULL);
2219 } else {
2220 method = Reflection::new_constructor(m, CHECK_NULL);
2221 }
2222 return JNIHandles::make_local(THREAD, method);
2223 }
2224
2225 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2226 {
2227 JvmtiVMObjectAllocEventCollector oam;
2228 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2229 bounds_check(cp, index, CHECK_NULL);
2230 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
2231 return res;
2232 }
2233 JVM_END
2234
2235 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2236 {
2237 JvmtiVMObjectAllocEventCollector oam;
2238 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2239 bounds_check(cp, index, CHECK_NULL);
2240 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
2241 return res;
2242 }
2243 JVM_END
2244
2245 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2246 constantTag tag = cp->tag_at(index);
2247 if (!tag.is_field()) {
2248 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2249 }
2250 int klass_ref = cp->uncached_klass_ref_index_at(index);
2251 Klass* k_o;
2252 if (force_resolution) {
2253 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2254 } else {
2255 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2256 if (k_o == nullptr) return nullptr;
2257 }
2258 InstanceKlass* k = InstanceKlass::cast(k_o);
2259 Symbol* name = cp->uncached_name_ref_at(index);
2260 Symbol* sig = cp->uncached_signature_ref_at(index);
2261 fieldDescriptor fd;
2262 Klass* target_klass = k->find_field(name, sig, &fd);
2263 if (target_klass == nullptr) {
2264 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2265 }
2266 oop field = Reflection::new_field(&fd, CHECK_NULL);
2267 return JNIHandles::make_local(THREAD, field);
2268 }
2269
2270 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
2271 {
2272 JvmtiVMObjectAllocEventCollector oam;
2273 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2274 bounds_check(cp, index, CHECK_NULL);
2275 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2276 return res;
2277 }
2278 JVM_END
2279
2280 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2281 {
2282 JvmtiVMObjectAllocEventCollector oam;
2283 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2284 bounds_check(cp, index, CHECK_NULL);
2285 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2286 return res;
2287 }
2288 JVM_END
2289
2290 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2291 {
2292 JvmtiVMObjectAllocEventCollector oam;
2293 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2294 bounds_check(cp, index, CHECK_NULL);
2295 constantTag tag = cp->tag_at(index);
2296 if (!tag.is_field_or_method()) {
2297 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2298 }
2299 int klass_ref = cp->uncached_klass_ref_index_at(index);
2300 Symbol* klass_name = cp->klass_name_at(klass_ref);
2301 Symbol* member_name = cp->uncached_name_ref_at(index);
2302 Symbol* member_sig = cp->uncached_signature_ref_at(index);
2303 objArrayOop dest_o = oopFactory::new_objArray(vmClasses::String_klass(), 3, CHECK_NULL);
2304 objArrayHandle dest(THREAD, dest_o);
2305 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2306 dest->obj_at_put(0, str());
2307 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2308 dest->obj_at_put(1, str());
2309 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2310 dest->obj_at_put(2, str());
2311 return (jobjectArray) JNIHandles::make_local(THREAD, dest());
2312 }
2313 JVM_END
2314
2315 JVM_ENTRY(jint, JVM_ConstantPoolGetClassRefIndexAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2316 {
2317 JvmtiVMObjectAllocEventCollector oam;
2318 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2319 bounds_check(cp, index, CHECK_0);
2320 constantTag tag = cp->tag_at(index);
2321 if (!tag.is_field_or_method()) {
2322 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2323 }
2324 return (jint) cp->uncached_klass_ref_index_at(index);
2325 }
2326 JVM_END
2327
2328 JVM_ENTRY(jint, JVM_ConstantPoolGetNameAndTypeRefIndexAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2329 {
2330 JvmtiVMObjectAllocEventCollector oam;
2331 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2332 bounds_check(cp, index, CHECK_0);
2333 constantTag tag = cp->tag_at(index);
2334 if (!tag.is_invoke_dynamic() && !tag.is_field_or_method()) {
2335 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2336 }
2337 return (jint) cp->uncached_name_and_type_ref_index_at(index);
2338 }
2339 JVM_END
2340
2341 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetNameAndTypeRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2342 {
2343 JvmtiVMObjectAllocEventCollector oam;
2344 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2345 bounds_check(cp, index, CHECK_NULL);
2346 constantTag tag = cp->tag_at(index);
2347 if (!tag.is_name_and_type()) {
2348 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2349 }
2350 Symbol* member_name = cp->symbol_at(cp->name_ref_index_at(index));
2351 Symbol* member_sig = cp->symbol_at(cp->signature_ref_index_at(index));
2352 objArrayOop dest_o = oopFactory::new_objArray(vmClasses::String_klass(), 2, CHECK_NULL);
2353 objArrayHandle dest(THREAD, dest_o);
2354 Handle str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2355 dest->obj_at_put(0, str());
2356 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2357 dest->obj_at_put(1, str());
2358 return (jobjectArray) JNIHandles::make_local(THREAD, dest());
2359 }
2360 JVM_END
2361
2362 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2363 {
2364 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2365 bounds_check(cp, index, CHECK_0);
2366 constantTag tag = cp->tag_at(index);
2367 if (!tag.is_int()) {
2368 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2369 }
2370 return cp->int_at(index);
2371 }
2372 JVM_END
2373
2374 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2375 {
2376 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2377 bounds_check(cp, index, CHECK_(0L));
2378 constantTag tag = cp->tag_at(index);
2379 if (!tag.is_long()) {
2380 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2381 }
2382 return cp->long_at(index);
2383 }
2384 JVM_END
2385
2386 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2387 {
2388 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2389 bounds_check(cp, index, CHECK_(0.0f));
2390 constantTag tag = cp->tag_at(index);
2391 if (!tag.is_float()) {
2392 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2393 }
2394 return cp->float_at(index);
2395 }
2396 JVM_END
2397
2398 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2399 {
2400 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2401 bounds_check(cp, index, CHECK_(0.0));
2402 constantTag tag = cp->tag_at(index);
2403 if (!tag.is_double()) {
2404 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2405 }
2406 return cp->double_at(index);
2407 }
2408 JVM_END
2409
2410 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2411 {
2412 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2413 bounds_check(cp, index, CHECK_NULL);
2414 constantTag tag = cp->tag_at(index);
2415 if (!tag.is_string()) {
2416 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2417 }
2418 oop str = cp->string_at(index, CHECK_NULL);
2419 return (jstring) JNIHandles::make_local(THREAD, str);
2420 }
2421 JVM_END
2422
2423 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
2424 {
2425 JvmtiVMObjectAllocEventCollector oam;
2426 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2427 bounds_check(cp, index, CHECK_NULL);
2428 constantTag tag = cp->tag_at(index);
2429 if (!tag.is_symbol()) {
2430 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2431 }
2432 Symbol* sym = cp->symbol_at(index);
2433 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2434 return (jstring) JNIHandles::make_local(THREAD, str());
2435 }
2436 JVM_END
2437
2438 JVM_ENTRY(jbyte, JVM_ConstantPoolGetTagAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2439 {
2440 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2441 bounds_check(cp, index, CHECK_0);
2442 constantTag tag = cp->tag_at(index);
2443 jbyte result = tag.value();
2444 // If returned tag values are not from the JVM spec, e.g. tags from 100 to 105,
2445 // they are changed to the corresponding tags from the JVM spec, so that java code in
2446 // sun.reflect.ConstantPool will return only tags from the JVM spec, not internal ones.
2447 if (tag.is_klass_or_reference()) {
2448 result = JVM_CONSTANT_Class;
2449 } else if (tag.is_string_index()) {
2450 result = JVM_CONSTANT_String;
2451 } else if (tag.is_method_type_in_error()) {
2452 result = JVM_CONSTANT_MethodType;
2453 } else if (tag.is_method_handle_in_error()) {
2454 result = JVM_CONSTANT_MethodHandle;
2455 } else if (tag.is_dynamic_constant_in_error()) {
2456 result = JVM_CONSTANT_Dynamic;
2457 }
2458 return result;
2459 }
2460 JVM_END
2461
2462 // Assertion support. //////////////////////////////////////////////////////////
2463
2464 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2465 assert(cls != nullptr, "bad class");
2466
2467 oop r = JNIHandles::resolve(cls);
2468 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2469 if (java_lang_Class::is_primitive(r)) return false;
2470
2471 Klass* k = java_lang_Class::as_Klass(r);
2472 assert(k->is_instance_klass(), "must be an instance klass");
2473 if (!k->is_instance_klass()) return false;
2474
2475 ResourceMark rm(THREAD);
2476 const char* name = k->name()->as_C_string();
2477 bool system_class = k->class_loader() == nullptr;
2478 return JavaAssertions::enabled(name, system_class);
2479
2480 JVM_END
2481
2482
2483 // Return a new AssertionStatusDirectives object with the fields filled in with
2484 // command-line assertion arguments (i.e., -ea, -da).
2485 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2486 JvmtiVMObjectAllocEventCollector oam;
2487 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2488 return JNIHandles::make_local(THREAD, asd);
2489 JVM_END
2490
2491 // Verification ////////////////////////////////////////////////////////////////////////////////
2492
2493 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2494
2495 // RedefineClasses support: bug 6214132 caused verification to fail.
2496 // All functions from this section should call the jvmtiThreadSate function:
2497 // Klass* class_to_verify_considering_redefinition(Klass* klass).
2498 // The function returns a Klass* of the _scratch_class if the verifier
2499 // was invoked in the middle of the class redefinition.
2500 // Otherwise it returns its argument value which is the _the_class Klass*.
2501 // Please, refer to the description in the jvmtiThreadSate.hpp.
2502
2503 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2504 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2505 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2506 return k->name()->as_utf8();
2507 JVM_END
2508
2509
2510 JVM_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2511 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2512 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2513 // types will have length zero if this is not an InstanceKlass
2514 // (length is determined by call to JVM_GetClassCPEntriesCount)
2515 if (k->is_instance_klass()) {
2516 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2517 for (int index = cp->length() - 1; index >= 0; index--) {
2518 constantTag tag = cp->tag_at(index);
2519 types[index] = (tag.is_unresolved_klass()) ? (unsigned char) JVM_CONSTANT_Class : tag.value();
2520 }
2521 }
2522 JVM_END
2523
2524
2525 JVM_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2526 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2527 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2528 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->constants()->length();
2529 JVM_END
2530
2531
2532 JVM_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2533 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2534 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2535 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->java_fields_count();
2536 JVM_END
2537
2538
2539 JVM_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2540 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2541 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2542 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->methods()->length();
2543 JVM_END
2544
2545
2546 // The following methods, used for the verifier, are never called with
2547 // array klasses, so a direct cast to InstanceKlass is safe.
2548 // Typically, these methods are called in a loop with bounds determined
2549 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2550 // zero for arrays.
2551 JVM_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2552 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2553 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2554 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2555 int length = method->checked_exceptions_length();
2556 if (length > 0) {
2557 CheckedExceptionElement* table= method->checked_exceptions_start();
2558 for (int i = 0; i < length; i++) {
2559 exceptions[i] = table[i].class_cp_index;
2560 }
2561 }
2562 JVM_END
2563
2564
2565 JVM_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2566 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2567 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2568 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2569 return method->checked_exceptions_length();
2570 JVM_END
2571
2572
2573 JVM_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2574 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2575 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2576 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2577 memcpy(code, method->code_base(), method->code_size());
2578 JVM_END
2579
2580
2581 JVM_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2582 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2583 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2584 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2585 return method->code_size();
2586 JVM_END
2587
2588
2589 JVM_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2590 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2591 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2592 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2593 ExceptionTable extable(method);
2594 entry->start_pc = extable.start_pc(entry_index);
2595 entry->end_pc = extable.end_pc(entry_index);
2596 entry->handler_pc = extable.handler_pc(entry_index);
2597 entry->catchType = extable.catch_type_index(entry_index);
2598 JVM_END
2599
2600
2601 JVM_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2602 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2603 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2604 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2605 return method->exception_table_length();
2606 JVM_END
2607
2608
2609 JVM_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2610 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2611 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2612 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2613 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2614 JVM_END
2615
2616
2617 JVM_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2618 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2619 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2620 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2621 JVM_END
2622
2623
2624 JVM_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2625 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2626 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2627 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2628 return method->max_locals();
2629 JVM_END
2630
2631
2632 JVM_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2633 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2634 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2635 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2636 return method->size_of_parameters();
2637 JVM_END
2638
2639
2640 JVM_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2641 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2642 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2643 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2644 return method->verifier_max_stack();
2645 JVM_END
2646
2647
2648 JVM_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2649 ResourceMark rm(THREAD);
2650 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2651 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2652 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2653 return method->name() == vmSymbols::object_initializer_name();
2654 JVM_END
2655
2656
2657 JVM_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2658 ResourceMark rm(THREAD);
2659 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2660 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2661 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2662 return method->is_overpass();
2663 JVM_END
2664
2665 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2666 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2667 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2668 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2669 return method->name()->as_utf8();
2670 JVM_END
2671
2672
2673 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2674 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2675 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2676 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2677 return method->signature()->as_utf8();
2678 JVM_END
2679
2680 /**
2681 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2682 * read entries in the constant pool. Since the old verifier always
2683 * works on a copy of the code, it will not see any rewriting that
2684 * may possibly occur in the middle of verification. So it is important
2685 * that nothing it calls tries to use the cpCache instead of the raw
2686 * constant pool, so we must use cp->uncached_x methods when appropriate.
2687 */
2688 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2689 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2690 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2691 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2692 switch (cp->tag_at(cp_index).value()) {
2693 case JVM_CONSTANT_Fieldref:
2694 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2695 default:
2696 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2697 }
2698 ShouldNotReachHere();
2699 return nullptr;
2700 JVM_END
2701
2702
2703 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2704 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2705 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2706 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2707 switch (cp->tag_at(cp_index).value()) {
2708 case JVM_CONSTANT_InterfaceMethodref:
2709 case JVM_CONSTANT_Methodref:
2710 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2711 default:
2712 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2713 }
2714 ShouldNotReachHere();
2715 return nullptr;
2716 JVM_END
2717
2718
2719 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2720 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2721 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2722 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2723 switch (cp->tag_at(cp_index).value()) {
2724 case JVM_CONSTANT_InterfaceMethodref:
2725 case JVM_CONSTANT_Methodref:
2726 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2727 default:
2728 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2729 }
2730 ShouldNotReachHere();
2731 return nullptr;
2732 JVM_END
2733
2734
2735 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2736 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2737 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2738 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2739 switch (cp->tag_at(cp_index).value()) {
2740 case JVM_CONSTANT_Fieldref:
2741 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2742 default:
2743 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2744 }
2745 ShouldNotReachHere();
2746 return nullptr;
2747 JVM_END
2748
2749
2750 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2751 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2752 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2753 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2754 Symbol* classname = cp->klass_name_at(cp_index);
2755 return classname->as_utf8();
2756 JVM_END
2757
2758
2759 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2760 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2761 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2762 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2763 switch (cp->tag_at(cp_index).value()) {
2764 case JVM_CONSTANT_Fieldref: {
2765 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2766 Symbol* classname = cp->klass_name_at(class_index);
2767 return classname->as_utf8();
2768 }
2769 default:
2770 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2771 }
2772 ShouldNotReachHere();
2773 return nullptr;
2774 JVM_END
2775
2776
2777 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2778 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2779 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2780 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2781 switch (cp->tag_at(cp_index).value()) {
2782 case JVM_CONSTANT_Methodref:
2783 case JVM_CONSTANT_InterfaceMethodref: {
2784 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2785 Symbol* classname = cp->klass_name_at(class_index);
2786 return classname->as_utf8();
2787 }
2788 default:
2789 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2790 }
2791 ShouldNotReachHere();
2792 return nullptr;
2793 JVM_END
2794
2795
2796 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2797 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2798 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2799 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2800 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2801 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2802 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2803 switch (cp->tag_at(cp_index).value()) {
2804 case JVM_CONSTANT_Fieldref: {
2805 Symbol* name = cp->uncached_name_ref_at(cp_index);
2806 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2807 InstanceKlass* ik = InstanceKlass::cast(k_called);
2808 for (JavaFieldStream fs(ik); !fs.done(); fs.next()) {
2809 if (fs.name() == name && fs.signature() == signature) {
2810 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2811 }
2812 }
2813 return -1;
2814 }
2815 default:
2816 fatal("JVM_GetCPFieldModifiers: illegal constant");
2817 }
2818 ShouldNotReachHere();
2819 return 0;
2820 JVM_END
2821
2822
2823 JVM_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2824 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2825 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2826 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2827 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2828 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2829 switch (cp->tag_at(cp_index).value()) {
2830 case JVM_CONSTANT_Methodref:
2831 case JVM_CONSTANT_InterfaceMethodref: {
2832 Symbol* name = cp->uncached_name_ref_at(cp_index);
2833 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2834 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2835 int methods_count = methods->length();
2836 for (int i = 0; i < methods_count; i++) {
2837 Method* method = methods->at(i);
2838 if (method->name() == name && method->signature() == signature) {
2839 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2840 }
2841 }
2842 return -1;
2843 }
2844 default:
2845 fatal("JVM_GetCPMethodModifiers: illegal constant");
2846 }
2847 ShouldNotReachHere();
2848 return 0;
2849 JVM_END
2850
2851
2852 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2853
2854 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2855 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2856 JVM_END
2857
2858
2859 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2860 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2861 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2862 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2863 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2864 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2865 JVM_END
2866
2867 // Printing support //////////////////////////////////////////////////
2868 extern "C" {
2869
2870 ATTRIBUTE_PRINTF(3, 0)
2871 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2872 // Reject count values that are negative signed values converted to
2873 // unsigned; see bug 4399518, 4417214
2874 if ((intptr_t)count <= 0) return -1;
2875
2876 int result = os::vsnprintf(str, count, fmt, args);
2877 if (result > 0 && (size_t)result >= count) {
2878 result = -1;
2879 }
2938 // In most of the JVM thread support functions we need to access the
2939 // thread through a ThreadsListHandle to prevent it from exiting and
2940 // being reclaimed while we try to operate on it. The exceptions to this
2941 // rule are when operating on the current thread, or if the monitor of
2942 // the target java.lang.Thread is locked at the Java level - in both
2943 // cases the target cannot exit.
2944
2945 static void thread_entry(JavaThread* thread, TRAPS) {
2946 HandleMark hm(THREAD);
2947 Handle obj(THREAD, thread->threadObj());
2948 JavaValue result(T_VOID);
2949 JavaCalls::call_virtual(&result,
2950 obj,
2951 vmClasses::Thread_klass(),
2952 vmSymbols::run_method_name(),
2953 vmSymbols::void_method_signature(),
2954 THREAD);
2955 }
2956
2957
2958 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2959 #if INCLUDE_CDS
2960 if (CDSConfig::is_dumping_static_archive()) {
2961 // During java -Xshare:dump, if we allow multiple Java threads to
2962 // execute in parallel, symbols and classes may be loaded in
2963 // random orders which will make the resulting CDS archive
2964 // non-deterministic.
2965 //
2966 // Lucikly, during java -Xshare:dump, it's important to run only
2967 // the code in the main Java thread (which is NOT started here) that
2968 // creates the module graph, etc. It's safe to not start the other
2969 // threads which are launched by class static initializers
2970 // (ReferenceHandler, FinalizerThread and CleanerImpl).
2971 if (log_is_enabled(Info, cds)) {
2972 ResourceMark rm;
2973 oop t = JNIHandles::resolve_non_null(jthread);
2974 log_info(cds)("JVM_StartThread() ignored: %s", t->klass()->external_name());
2975 }
2976 return;
2977 }
2978 #endif
2979 JavaThread *native_thread = nullptr;
2980
3034 log_warning(os, thread)("Failed to start the native thread for java.lang.Thread \"%s\"",
3035 JavaThread::name_for(JNIHandles::resolve_non_null(jthread)));
3036 // No one should hold a reference to the 'native_thread'.
3037 native_thread->smr_delete();
3038 if (JvmtiExport::should_post_resource_exhausted()) {
3039 JvmtiExport::post_resource_exhausted(
3040 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
3041 os::native_thread_creation_failed_msg());
3042 }
3043 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
3044 os::native_thread_creation_failed_msg());
3045 }
3046
3047 JFR_ONLY(Jfr::on_java_thread_start(thread, native_thread);)
3048
3049 Thread::start(native_thread);
3050
3051 JVM_END
3052
3053
3054 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
3055 ThreadsListHandle tlh(thread);
3056 oop java_thread = nullptr;
3057 JavaThread* receiver = nullptr;
3058 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, &java_thread);
3059 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
3060
3061 if (is_alive) {
3062 // jthread refers to a live JavaThread.
3063 Thread::set_priority(receiver, (ThreadPriority)prio);
3064 }
3065 // Implied else: If the JavaThread hasn't started yet, then the
3066 // priority set in the java.lang.Thread object above will be pushed
3067 // down when it does start.
3068 JVM_END
3069
3070
3071 JVM_LEAF(void, JVM_Yield(JNIEnv *env, jclass threadClass))
3072 if (os::dont_yield()) return;
3073 HOTSPOT_THREAD_YIELD();
3074 os::naked_yield();
3075 JVM_END
3076
3077 JVM_ENTRY(void, JVM_SleepNanos(JNIEnv* env, jclass threadClass, jlong nanos))
3078 if (nanos < 0) {
3079 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "nanosecond timeout value out of range");
3080 }
3081
3082 if (thread->is_interrupted(true) && !HAS_PENDING_EXCEPTION) {
3083 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3084 }
3085
3086 // Save current thread state and restore it at the end of this block.
3087 // And set new thread state to SLEEPING.
3088 JavaThreadSleepState jtss(thread);
3089
3090 HOTSPOT_THREAD_SLEEP_BEGIN(nanos / NANOSECS_PER_MILLISEC);
3091
3092 if (nanos == 0) {
3093 os::naked_yield();
3094 } else {
3095 ThreadState old_state = thread->osthread()->get_state();
3096 thread->osthread()->set_state(SLEEPING);
3097 if (!thread->sleep_nanos(nanos)) { // interrupted
3098 // An asynchronous exception could have been thrown on
3099 // us while we were sleeping. We do not overwrite those.
3100 if (!HAS_PENDING_EXCEPTION) {
3101 HOTSPOT_THREAD_SLEEP_END(1);
3102
3103 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
3104 // to properly restore the thread state. That's likely wrong.
3105 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3106 }
3107 }
3108 thread->osthread()->set_state(old_state);
3109 }
3110 HOTSPOT_THREAD_SLEEP_END(0);
3111 JVM_END
3112
3113 JVM_ENTRY(jobject, JVM_CurrentCarrierThread(JNIEnv* env, jclass threadClass))
3114 oop jthread = thread->threadObj();
3115 assert(jthread != nullptr, "no current carrier thread!");
3116 return JNIHandles::make_local(THREAD, jthread);
3117 JVM_END
3118
3119 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
3120 oop theThread = thread->vthread();
3121 assert(theThread != (oop)nullptr, "no current thread!");
3122 return JNIHandles::make_local(THREAD, theThread);
3123 JVM_END
3124
3125 JVM_ENTRY(void, JVM_SetCurrentThread(JNIEnv* env, jobject thisThread,
3126 jobject theThread))
3127 oop threadObj = JNIHandles::resolve(theThread);
3128 thread->set_vthread(threadObj);
3129 JFR_ONLY(Jfr::on_set_current_thread(thread, threadObj);)
3130 JVM_END
3131
3132 JVM_ENTRY(jlong, JVM_GetNextThreadIdOffset(JNIEnv* env, jclass threadClass))
3133 return ThreadIdentifier::unsafe_offset();
3134 JVM_END
3135
3136 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
3137 ThreadsListHandle tlh(thread);
3138 JavaThread* receiver = nullptr;
3139 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, nullptr);
3140 if (is_alive) {
3141 // jthread refers to a live JavaThread.
3142 receiver->interrupt();
3143 }
3144 JVM_END
3145
3146 // Return true iff the current thread has locked the object passed in
3147
3148 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3149 if (obj == nullptr) {
3150 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3151 }
3152 Handle h_obj(THREAD, JNIHandles::resolve(obj));
3153 return ObjectSynchronizer::current_thread_holds_lock(thread, h_obj);
3154 JVM_END
3155
3156 JVM_ENTRY(jobject, JVM_GetStackTrace(JNIEnv *env, jobject jthread))
3157 oop trace = java_lang_Thread::async_get_stack_trace(JNIHandles::resolve(jthread), THREAD);
3158 return JNIHandles::make_local(THREAD, trace);
3159 JVM_END
3160
3161 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
3162 VM_PrintThreads op;
3163 VMThread::execute(&op);
3164 if (JvmtiExport::should_post_data_dump()) {
3165 JvmtiExport::post_data_dump();
3166 }
3167 JVM_END
3168
3169 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3170 // We don't use a ThreadsListHandle here because the current thread
3171 // must be alive.
3172 oop java_thread = JNIHandles::resolve_non_null(jthread);
3173 JavaThread* thr = java_lang_Thread::thread(java_thread);
3174 if (thread == thr && !thr->has_attached_via_jni()) {
3175 // Thread naming is only supported for the current thread and
3176 // we don't set the name of an attached thread to avoid stepping
3177 // on other programs.
3178 ResourceMark rm(thread);
3179 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3180 os::set_native_thread_name(thread_name);
3181 }
3182 JVM_END
3183
3184 JVM_ENTRY(jobject, JVM_ScopedValueCache(JNIEnv* env, jclass threadClass))
3185 oop theCache = thread->scopedValueCache();
3186 return JNIHandles::make_local(THREAD, theCache);
3187 JVM_END
3188
3189 JVM_ENTRY(void, JVM_SetScopedValueCache(JNIEnv* env, jclass threadClass,
3190 jobject theCache))
3191 arrayOop objs = arrayOop(JNIHandles::resolve(theCache));
3192 thread->set_scopedValueCache(objs);
3193 JVM_END
3194
3195 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3196
3197 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3198 ResourceMark rm(THREAD);
3199 JvmtiVMObjectAllocEventCollector oam;
3200 vframeStream vfst(thread);
3201
3202 if (vmClasses::reflect_CallerSensitive_klass() != nullptr) {
3203 // This must only be called from SecurityManager.getClassContext
3204 Method* m = vfst.method();
3205 if (!(m->method_holder() == vmClasses::SecurityManager_klass() &&
3206 m->name() == vmSymbols::getClassContext_name() &&
3207 m->signature() == vmSymbols::void_class_array_signature())) {
3208 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext");
3209 }
3210 }
3211
3212 // Collect method holders
3213 GrowableArray<Klass*>* klass_array = new GrowableArray<Klass*>();
3214 for (; !vfst.at_end(); vfst.security_next()) {
3215 Method* m = vfst.method();
3216 // Native frames are not returned
3217 if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) {
3218 Klass* holder = m->method_holder();
3219 assert(holder->is_klass(), "just checking");
3220 klass_array->append(holder);
3221 }
3222 }
3223
3224 // Create result array of type [Ljava/lang/Class;
3225 objArrayOop result = oopFactory::new_objArray(vmClasses::Class_klass(), klass_array->length(), CHECK_NULL);
3226 // Fill in mirrors corresponding to method holders
3227 for (int i = 0; i < klass_array->length(); i++) {
3228 result->obj_at_put(i, klass_array->at(i)->java_mirror());
3229 }
3230
3231 return (jobjectArray) JNIHandles::make_local(THREAD, result);
3232 JVM_END
3233
3234
3235 // java.lang.Package ////////////////////////////////////////////////////////////////
3236
3237
3238 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3239 ResourceMark rm(THREAD);
3240 JvmtiVMObjectAllocEventCollector oam;
3241 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3242 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3243 return (jstring) JNIHandles::make_local(THREAD, result);
3244 JVM_END
3245
3246
3247 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3248 JvmtiVMObjectAllocEventCollector oam;
3249 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3250 return (jobjectArray) JNIHandles::make_local(THREAD, result);
3251 JVM_END
3252
3253
3254 // java.lang.ref.Reference ///////////////////////////////////////////////////////////////
3255
3256
3257 JVM_ENTRY(jobject, JVM_GetAndClearReferencePendingList(JNIEnv* env))
3258 MonitorLocker ml(Heap_lock);
3259 oop ref = Universe::reference_pending_list();
3260 if (ref != nullptr) {
3261 Universe::clear_reference_pending_list();
3262 }
3263 return JNIHandles::make_local(THREAD, ref);
3264 JVM_END
3265
3266 JVM_ENTRY(jboolean, JVM_HasReferencePendingList(JNIEnv* env))
3267 MonitorLocker ml(Heap_lock);
3268 return Universe::has_reference_pending_list();
3269 JVM_END
3270
3271 JVM_ENTRY(void, JVM_WaitForReferencePendingList(JNIEnv* env))
3272 MonitorLocker ml(Heap_lock);
3273 while (!Universe::has_reference_pending_list()) {
3274 ml.wait();
3275 }
3276 JVM_END
3277
3278 JVM_ENTRY(jboolean, JVM_ReferenceRefersTo(JNIEnv* env, jobject ref, jobject o))
3279 oop ref_oop = JNIHandles::resolve_non_null(ref);
3280 // PhantomReference has it's own implementation of refersTo().
3281 // See: JVM_PhantomReferenceRefersTo
3282 assert(!java_lang_ref_Reference::is_phantom(ref_oop), "precondition");
3283 oop referent = java_lang_ref_Reference::weak_referent_no_keepalive(ref_oop);
3284 return referent == JNIHandles::resolve(o);
3285 JVM_END
3286
3287 JVM_ENTRY(void, JVM_ReferenceClear(JNIEnv* env, jobject ref))
3288 oop ref_oop = JNIHandles::resolve_non_null(ref);
3289 // FinalReference has it's own implementation of clear().
3290 assert(!java_lang_ref_Reference::is_final(ref_oop), "precondition");
3291 if (java_lang_ref_Reference::unknown_referent_no_keepalive(ref_oop) == nullptr) {
3292 // If the referent has already been cleared then done.
3293 // However, if the referent is dead but has not yet been cleared by
3294 // concurrent reference processing, it should NOT be cleared here.
3295 // Instead, clearing should be left to the GC. Clearing it here could
3296 // detectably lose an expected notification, which is impossible with
3297 // STW reference processing. The clearing in enqueue() doesn't have
3298 // this problem, since the enqueue covers the notification, but it's not
3299 // worth the effort to handle that case specially.
3300 return;
3301 }
3302 java_lang_ref_Reference::clear_referent(ref_oop);
3303 JVM_END
3304
3305
3306 // java.lang.ref.PhantomReference //////////////////////////////////////////////////
3307
3308
3309 JVM_ENTRY(jboolean, JVM_PhantomReferenceRefersTo(JNIEnv* env, jobject ref, jobject o))
3310 oop ref_oop = JNIHandles::resolve_non_null(ref);
3311 oop referent = java_lang_ref_Reference::phantom_referent_no_keepalive(ref_oop);
3312 return referent == JNIHandles::resolve(o);
3313 JVM_END
3314
3315
3316 // ObjectInputStream ///////////////////////////////////////////////////////////////
3317
3318 // Return the first user-defined class loader up the execution stack, or null
3319 // if only code from the bootstrap or platform class loader is on the stack.
3320
3321 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3322 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3323 InstanceKlass* ik = vfst.method()->method_holder();
3324 oop loader = ik->class_loader();
3325 if (loader != nullptr && !SystemDictionary::is_platform_class_loader(loader)) {
3326 // Skip reflection related frames
3327 if (!ik->is_subclass_of(vmClasses::reflect_SerializationConstructorAccessorImpl_klass())) {
3328 return JNIHandles::make_local(THREAD, loader);
3329 }
3330 }
3331 }
3332 return nullptr;
3333 JVM_END
3334
3335
3336 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3337
3338
3339 // resolve array handle and check arguments
3340 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3341 if (arr == nullptr) {
3342 THROW_0(vmSymbols::java_lang_NullPointerException());
3343 }
3344 oop a = JNIHandles::resolve_non_null(arr);
3345 if (!a->is_array()) {
3346 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3347 } else if (type_array_only && !a->is_typeArray()) {
3348 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array of primitive type");
3349 }
3350 return arrayOop(a);
3351 }
3352
3353
3354 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3355 arrayOop a = check_array(env, arr, false, CHECK_0);
3356 return a->length();
3357 JVM_END
3358
3359
3360 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3361 JvmtiVMObjectAllocEventCollector oam;
3362 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3363 jvalue value;
3364 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3365 oop box = Reflection::box(&value, type, CHECK_NULL);
3366 return JNIHandles::make_local(THREAD, box);
3367 JVM_END
3368
3369
3370 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3371 jvalue value;
3372 value.i = 0; // to initialize value before getting used in CHECK
3373 arrayOop a = check_array(env, arr, true, CHECK_(value));
3374 assert(a->is_typeArray(), "just checking");
3375 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3376 BasicType wide_type = (BasicType) wCode;
3377 if (type != wide_type) {
3378 Reflection::widen(&value, type, wide_type, CHECK_(value));
3379 }
3380 return value;
3381 JVM_END
3382
3383
3384 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3385 arrayOop a = check_array(env, arr, false, CHECK);
3386 oop box = JNIHandles::resolve(val);
3387 jvalue value;
3388 value.i = 0; // to initialize value before getting used in CHECK
3389 BasicType value_type;
3390 if (a->is_objArray()) {
3391 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3392 value_type = Reflection::unbox_for_regular_object(box, &value);
3393 } else {
3394 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3395 }
3396 Reflection::array_set(&value, a, index, value_type, CHECK);
3397 JVM_END
3398
3399
3400 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3401 arrayOop a = check_array(env, arr, true, CHECK);
3402 assert(a->is_typeArray(), "just checking");
3403 BasicType value_type = (BasicType) vCode;
3404 Reflection::array_set(&v, a, index, value_type, CHECK);
3405 JVM_END
3406
3407
3408 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3409 JvmtiVMObjectAllocEventCollector oam;
3410 oop element_mirror = JNIHandles::resolve(eltClass);
3411 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3412 return JNIHandles::make_local(THREAD, result);
3413 JVM_END
3414
3415
3416 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3417 JvmtiVMObjectAllocEventCollector oam;
3418 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3419 oop element_mirror = JNIHandles::resolve(eltClass);
3420 assert(dim_array->is_typeArray(), "just checking");
3421 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3422 return JNIHandles::make_local(THREAD, result);
3423 JVM_END
3424
3425
3426 // Library support ///////////////////////////////////////////////////////////////////////////
3427
3428 JVM_LEAF(void*, JVM_LoadZipLibrary())
3429 return ZipLibrary::handle();
3430 JVM_END
3431
3432 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name, jboolean throwException))
3433 //%note jvm_ct
3434 char ebuf[1024];
3435 void *load_result;
3436 {
3437 ThreadToNativeFromVM ttnfvm(thread);
3438 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3439 }
3440 if (load_result == nullptr) {
3441 if (throwException) {
3442 char msg[1024];
3443 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3444 // Since 'ebuf' may contain a string encoded using
3445 // platform encoding scheme, we need to pass
3446 // Exceptions::unsafe_to_utf8 to the new_exception method
3447 // as the last argument. See bug 6367357.
3448 Handle h_exception =
3449 Exceptions::new_exception(thread,
3450 vmSymbols::java_lang_UnsatisfiedLinkError(),
3451 msg, Exceptions::unsafe_to_utf8);
3452
3453 THROW_HANDLE_0(h_exception);
3454 } else {
3455 log_info(library)("Failed to load library %s", name);
3456 return load_result;
3457 }
3458 }
3459 log_info(library)("Loaded library %s, handle " INTPTR_FORMAT, name, p2i(load_result));
3460 return load_result;
3461 JVM_END
3462
3463
3464 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3465 os::dll_unload(handle);
3466 log_info(library)("Unloaded library with handle " INTPTR_FORMAT, p2i(handle));
3467 JVM_END
3468
3469
3470 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3471 void* find_result = os::dll_lookup(handle, name);
3472 log_info(library)("%s %s in library with handle " INTPTR_FORMAT,
3473 find_result != nullptr ? "Found" : "Failed to find",
3474 name, p2i(handle));
3475 return find_result;
3476 JVM_END
3477
3478
3479 // JNI version ///////////////////////////////////////////////////////////////////////////////
3480
3481 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3482 return Threads::is_supported_jni_version_including_1_1(version);
3483 JVM_END
3484
3485
3486 JVM_LEAF(jboolean, JVM_IsPreviewEnabled(void))
3487 return Arguments::enable_preview() ? JNI_TRUE : JNI_FALSE;
3488 JVM_END
3489
3490 JVM_LEAF(jboolean, JVM_IsContinuationsSupported(void))
3491 return VMContinuations ? JNI_TRUE : JNI_FALSE;
3492 JVM_END
3493
3494 JVM_LEAF(jboolean, JVM_IsForeignLinkerSupported(void))
3495 return ForeignGlobals::is_foreign_linker_supported() ? JNI_TRUE : JNI_FALSE;
3496 JVM_END
3497
3498 // String support ///////////////////////////////////////////////////////////////////////////
3499
3500 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3501 JvmtiVMObjectAllocEventCollector oam;
3502 if (str == nullptr) return nullptr;
3503 oop string = JNIHandles::resolve_non_null(str);
3504 oop result = StringTable::intern(string, CHECK_NULL);
3505 return (jstring) JNIHandles::make_local(THREAD, result);
3506 JVM_END
3507
3508
3509 // VM Raw monitor support //////////////////////////////////////////////////////////////////////
3510
3511 // VM Raw monitors (not to be confused with JvmtiRawMonitors) are a simple mutual exclusion
3512 // lock (not actually monitors: no wait/notify) that is exported by the VM for use by JDK
3513 // library code. They may be used by JavaThreads and non-JavaThreads and do not participate
3514 // in the safepoint protocol, thread suspension, thread interruption, or anything of that
3515 // nature. JavaThreads will be "in native" when using this API from JDK code.
3516
3517
3518 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3519 VM_Exit::block_if_vm_exited();
3520 return new PlatformMutex();
3546 Handle loader, Handle protection_domain,
3547 jboolean throwError, TRAPS) {
3548 // Security Note:
3549 // The Java level wrapper will perform the necessary security check allowing
3550 // us to pass the null as the initiating class loader. The VM is responsible for
3551 // the checkPackageAccess relative to the initiating class loader via the
3552 // protection_domain. The protection_domain is passed as null by the java code
3553 // if there is no security manager in 3-arg Class.forName().
3554 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
3555
3556 // Check if we should initialize the class
3557 if (init && klass->is_instance_klass()) {
3558 klass->initialize(CHECK_NULL);
3559 }
3560 return (jclass) JNIHandles::make_local(THREAD, klass->java_mirror());
3561 }
3562
3563
3564 // Method ///////////////////////////////////////////////////////////////////////////////////////////
3565
3566 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
3567 Handle method_handle;
3568 if (thread->stack_overflow_state()->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
3569 method_handle = Handle(THREAD, JNIHandles::resolve(method));
3570 Handle receiver(THREAD, JNIHandles::resolve(obj));
3571 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3572 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
3573 jobject res = JNIHandles::make_local(THREAD, result);
3574 if (JvmtiExport::should_post_vm_object_alloc()) {
3575 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
3576 assert(ret_type != nullptr, "sanity check: ret_type oop must not be null!");
3577 if (java_lang_Class::is_primitive(ret_type)) {
3578 // Only for primitive type vm allocates memory for java object.
3579 // See box() method.
3580 JvmtiExport::post_vm_object_alloc(thread, result);
3581 }
3582 }
3583 return res;
3584 } else {
3585 THROW_0(vmSymbols::java_lang_StackOverflowError());
3586 }
3587 JVM_END
3588
3589
3590 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
3591 oop constructor_mirror = JNIHandles::resolve(c);
3592 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3593 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
3594 jobject res = JNIHandles::make_local(THREAD, result);
3595 if (JvmtiExport::should_post_vm_object_alloc()) {
3596 JvmtiExport::post_vm_object_alloc(thread, result);
3597 }
3598 return res;
3599 JVM_END
3600
3601 JVM_ENTRY(void, JVM_InitializeFromArchive(JNIEnv* env, jclass cls))
3602 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
3603 assert(k->is_klass(), "just checking");
3604 HeapShared::initialize_from_archived_subgraph(THREAD, k);
3605 JVM_END
3606
3607 JVM_ENTRY(void, JVM_RegisterLambdaProxyClassForArchiving(JNIEnv* env,
3608 jclass caller,
3609 jstring interfaceMethodName,
3610 jobject factoryType,
3611 jobject interfaceMethodType,
3612 jobject implementationMember,
3613 jobject dynamicMethodType,
3614 jclass lambdaProxyClass))
3615 #if INCLUDE_CDS
3616 if (!CDSConfig::is_dumping_archive()) {
3617 return;
3618 }
3619
3620 Klass* caller_k = java_lang_Class::as_Klass(JNIHandles::resolve(caller));
3621 InstanceKlass* caller_ik = InstanceKlass::cast(caller_k);
3622 if (caller_ik->is_hidden()) {
3623 // Hidden classes not of type lambda proxy classes are currently not being archived.
3624 // If the caller_ik is of one of the above types, the corresponding lambda proxy class won't be
3625 // registered for archiving.
3626 return;
3627 }
3635 interface_method_name = java_lang_String::as_symbol(JNIHandles::resolve_non_null(interfaceMethodName));
3636 }
3637 Handle factory_type_oop(THREAD, JNIHandles::resolve_non_null(factoryType));
3638 Symbol* factory_type = java_lang_invoke_MethodType::as_signature(factory_type_oop(), true);
3639
3640 Handle interface_method_type_oop(THREAD, JNIHandles::resolve_non_null(interfaceMethodType));
3641 Symbol* interface_method_type = java_lang_invoke_MethodType::as_signature(interface_method_type_oop(), true);
3642
3643 Handle implementation_member_oop(THREAD, JNIHandles::resolve_non_null(implementationMember));
3644 assert(java_lang_invoke_MemberName::is_method(implementation_member_oop()), "must be");
3645 Method* m = java_lang_invoke_MemberName::vmtarget(implementation_member_oop());
3646
3647 Handle dynamic_method_type_oop(THREAD, JNIHandles::resolve_non_null(dynamicMethodType));
3648 Symbol* dynamic_method_type = java_lang_invoke_MethodType::as_signature(dynamic_method_type_oop(), true);
3649
3650 SystemDictionaryShared::add_lambda_proxy_class(caller_ik, lambda_ik, interface_method_name, factory_type,
3651 interface_method_type, m, dynamic_method_type, THREAD);
3652 #endif // INCLUDE_CDS
3653 JVM_END
3654
3655 JVM_ENTRY(jclass, JVM_LookupLambdaProxyClassFromArchive(JNIEnv* env,
3656 jclass caller,
3657 jstring interfaceMethodName,
3658 jobject factoryType,
3659 jobject interfaceMethodType,
3660 jobject implementationMember,
3661 jobject dynamicMethodType))
3662 #if INCLUDE_CDS
3663
3664 if (interfaceMethodName == nullptr || factoryType == nullptr || interfaceMethodType == nullptr ||
3665 implementationMember == nullptr || dynamicMethodType == nullptr) {
3666 THROW_(vmSymbols::java_lang_NullPointerException(), nullptr);
3667 }
3668
3669 Klass* caller_k = java_lang_Class::as_Klass(JNIHandles::resolve(caller));
3670 InstanceKlass* caller_ik = InstanceKlass::cast(caller_k);
3671 if (!caller_ik->is_shared()) {
3672 // there won't be a shared lambda class if the caller_ik is not in the shared archive.
3673 return nullptr;
3674 }
3675
3683 Handle implementation_member_oop(THREAD, JNIHandles::resolve_non_null(implementationMember));
3684 assert(java_lang_invoke_MemberName::is_method(implementation_member_oop()), "must be");
3685 Method* m = java_lang_invoke_MemberName::vmtarget(implementation_member_oop());
3686
3687 Handle dynamic_method_type_oop(THREAD, JNIHandles::resolve_non_null(dynamicMethodType));
3688 Symbol* dynamic_method_type = java_lang_invoke_MethodType::as_signature(dynamic_method_type_oop(), true);
3689
3690 InstanceKlass* lambda_ik = SystemDictionaryShared::get_shared_lambda_proxy_class(caller_ik, interface_method_name, factory_type,
3691 interface_method_type, m, dynamic_method_type);
3692 jclass jcls = nullptr;
3693 if (lambda_ik != nullptr) {
3694 InstanceKlass* loaded_lambda = SystemDictionaryShared::prepare_shared_lambda_proxy_class(lambda_ik, caller_ik, THREAD);
3695 jcls = loaded_lambda == nullptr ? nullptr : (jclass) JNIHandles::make_local(THREAD, loaded_lambda->java_mirror());
3696 }
3697 return jcls;
3698 #else
3699 return nullptr;
3700 #endif // INCLUDE_CDS
3701 JVM_END
3702
3703 JVM_ENTRY_NO_ENV(jlong, JVM_GetRandomSeedForDumping())
3704 if (CDSConfig::is_dumping_static_archive()) {
3705 // We do this so that the default CDS archive can be deterministic.
3706 const char* release = VM_Version::vm_release();
3707 const char* dbg_level = VM_Version::jdk_debug_level();
3708 const char* version = VM_Version::internal_vm_info_string();
3709 jlong seed = (jlong)(java_lang_String::hash_code((const jbyte*)release, (int)strlen(release)) ^
3710 java_lang_String::hash_code((const jbyte*)dbg_level, (int)strlen(dbg_level)) ^
3711 java_lang_String::hash_code((const jbyte*)version, (int)strlen(version)));
3712 seed += (jlong)VM_Version::vm_major_version();
3713 seed += (jlong)VM_Version::vm_minor_version();
3714 seed += (jlong)VM_Version::vm_security_version();
3715 seed += (jlong)VM_Version::vm_patch_version();
3716 if (seed == 0) { // don't let this ever be zero.
3717 seed = 0x87654321;
3718 }
3719 log_debug(cds)("JVM_GetRandomSeedForDumping() = " JLONG_FORMAT, seed);
3720 return seed;
3721 } else {
3722 return 0;
3723 }
3724 JVM_END
3725
3726 JVM_ENTRY_NO_ENV(jint, JVM_GetCDSConfigStatus())
3727 return CDSConfig::get_status();
3728 JVM_END
3729
3730 JVM_ENTRY(void, JVM_LogLambdaFormInvoker(JNIEnv *env, jstring line))
3731 #if INCLUDE_CDS
3732 assert(CDSConfig::is_logging_lambda_form_invokers(), "sanity");
3733 if (line != nullptr) {
3734 ResourceMark rm(THREAD);
3735 Handle h_line (THREAD, JNIHandles::resolve_non_null(line));
3736 char* c_line = java_lang_String::as_utf8_string(h_line());
3737 if (CDSConfig::is_dumping_dynamic_archive()) {
3738 // Note: LambdaFormInvokers::append take same format which is not
3739 // same as below the print format. The line does not include LAMBDA_FORM_TAG.
3740 LambdaFormInvokers::append(os::strdup((const char*)c_line, mtInternal));
3741 }
3742 if (ClassListWriter::is_enabled()) {
3743 ClassListWriter w;
3744 w.stream()->print_cr("%s %s", ClassListParser::lambda_form_tag(), c_line);
3745 }
3746 }
3747 #endif // INCLUDE_CDS
3748 JVM_END
3749
3750 JVM_ENTRY(void, JVM_DumpClassListToFile(JNIEnv *env, jstring listFileName))
3751 #if INCLUDE_CDS
3752 ResourceMark rm(THREAD);
3753 Handle file_handle(THREAD, JNIHandles::resolve_non_null(listFileName));
3754 char* file_name = java_lang_String::as_utf8_string(file_handle());
3755 MetaspaceShared::dump_loaded_classes(file_name, THREAD);
3756 #endif // INCLUDE_CDS
3757 JVM_END
3758
3759 JVM_ENTRY(void, JVM_DumpDynamicArchive(JNIEnv *env, jstring archiveName))
3760 #if INCLUDE_CDS
3761 ResourceMark rm(THREAD);
3762 Handle file_handle(THREAD, JNIHandles::resolve_non_null(archiveName));
3763 char* archive_name = java_lang_String::as_utf8_string(file_handle());
3764 DynamicArchive::dump_for_jcmd(archive_name, CHECK);
3765 #endif // INCLUDE_CDS
3766 JVM_END
3767
3768 // Returns an array of all live Thread objects (VM internal JavaThreads,
3769 // jvmti agent threads, and JNI attaching threads are skipped)
3770 // See CR 6404306 regarding JNI attaching threads
3771 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
3772 ResourceMark rm(THREAD);
3773 ThreadsListEnumerator tle(THREAD, false, false);
3774 JvmtiVMObjectAllocEventCollector oam;
3775
3776 int num_threads = tle.num_threads();
3777 objArrayOop r = oopFactory::new_objArray(vmClasses::Thread_klass(), num_threads, CHECK_NULL);
3778 objArrayHandle threads_ah(THREAD, r);
3779
3780 for (int i = 0; i < num_threads; i++) {
3781 Handle h = tle.get_threadObj(i);
3782 threads_ah->obj_at_put(i, h());
3783 }
3784
3785 return (jobjectArray) JNIHandles::make_local(THREAD, threads_ah());
3786 JVM_END
3787
3788
3789 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
3790 // Return StackTraceElement[][], each element is the stack trace of a thread in
3791 // the corresponding entry in the given threads array
3792 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
3793 JvmtiVMObjectAllocEventCollector oam;
3794
3795 // Check if threads is null
3796 if (threads == nullptr) {
3797 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
3798 }
3799
3800 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
3801 objArrayHandle ah(THREAD, a);
3802 int num_threads = ah->length();
3803 // check if threads is non-empty array
3804 if (num_threads == 0) {
3805 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
3806 }
3807
3808 // check if threads is not an array of objects of Thread class
3809 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
3810 if (k != vmClasses::Thread_klass()) {
3811 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
3812 }
3813
3814 ResourceMark rm(THREAD);
3815
3816 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
3817 for (int i = 0; i < num_threads; i++) {
3818 oop thread_obj = ah->obj_at(i);
3819 instanceHandle h(THREAD, (instanceOop) thread_obj);
3820 thread_handle_array->append(h);
3821 }
3822
3823 // The JavaThread references in thread_handle_array are validated
3824 // in VM_ThreadDump::doit().
3825 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
3826 return (jobjectArray)JNIHandles::make_local(THREAD, stacktraces());
3827
3828 JVM_END
3829
3830 // JVM monitoring and management support
3831 JVM_LEAF(void*, JVM_GetManagement(jint version))
3832 return Management::get_jmm_interface(version);
3833 JVM_END
3834
3835 // com.sun.tools.attach.VirtualMachine agent properties support
3836 //
3837 // Initialize the agent properties with the properties maintained in the VM
3838 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
3839 ResourceMark rm;
3840
3841 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
3842
3843 PUTPROP(props, "sun.java.command", Arguments::java_command());
3844 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
3845 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
3846 return properties;
3847 JVM_END
3848
3849 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
3850 {
3851 JvmtiVMObjectAllocEventCollector oam;
3852
3853 if (ofClass == nullptr) {
3854 return nullptr;
3855 }
3856 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
3857 // Special handling for primitive objects
3858 if (java_lang_Class::is_primitive(mirror())) {
3859 return nullptr;
3860 }
3861 Klass* k = java_lang_Class::as_Klass(mirror());
3862 if (!k->is_instance_klass()) {
3863 return nullptr;
3864 }
3865 InstanceKlass* ik = InstanceKlass::cast(k);
3866 int encl_method_class_idx = ik->enclosing_method_class_index();
3867 if (encl_method_class_idx == 0) {
3868 return nullptr;
3869 }
3872 Klass* enc_k = ik->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
3873 dest->obj_at_put(0, enc_k->java_mirror());
3874 int encl_method_method_idx = ik->enclosing_method_method_index();
3875 if (encl_method_method_idx != 0) {
3876 Symbol* sym = ik->constants()->symbol_at(
3877 extract_low_short_from_int(
3878 ik->constants()->name_and_type_at(encl_method_method_idx)));
3879 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3880 dest->obj_at_put(1, str());
3881 sym = ik->constants()->symbol_at(
3882 extract_high_short_from_int(
3883 ik->constants()->name_and_type_at(encl_method_method_idx)));
3884 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3885 dest->obj_at_put(2, str());
3886 }
3887 return (jobjectArray) JNIHandles::make_local(THREAD, dest());
3888 }
3889 JVM_END
3890
3891 // Returns an array of java.lang.String objects containing the input arguments to the VM.
3892 JVM_ENTRY(jobjectArray, JVM_GetVmArguments(JNIEnv *env))
3893 ResourceMark rm(THREAD);
3894
3895 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) {
3896 return nullptr;
3897 }
3898
3899 char** vm_flags = Arguments::jvm_flags_array();
3900 char** vm_args = Arguments::jvm_args_array();
3901 int num_flags = Arguments::num_jvm_flags();
3902 int num_args = Arguments::num_jvm_args();
3903
3904 InstanceKlass* ik = vmClasses::String_klass();
3905 objArrayOop r = oopFactory::new_objArray(ik, num_args + num_flags, CHECK_NULL);
3906 objArrayHandle result_h(THREAD, r);
3907
3908 int index = 0;
3909 for (int j = 0; j < num_flags; j++, index++) {
3910 Handle h = java_lang_String::create_from_platform_dependent_str(vm_flags[j], CHECK_NULL);
3911 result_h->obj_at_put(index, h());
3912 }
3913 for (int i = 0; i < num_args; i++, index++) {
3914 Handle h = java_lang_String::create_from_platform_dependent_str(vm_args[i], CHECK_NULL);
3915 result_h->obj_at_put(index, h());
3916 }
3917 return (jobjectArray) JNIHandles::make_local(THREAD, result_h());
3918 JVM_END
3919
3920 JVM_LEAF(jint, JVM_FindSignal(const char *name))
3921 return os::get_signal_number(name);
3922 JVM_END
3923
3924 JVM_ENTRY(void, JVM_VirtualThreadStart(JNIEnv* env, jobject vthread))
3925 #if INCLUDE_JVMTI
3926 if (!DoJVMTIVirtualThreadTransitions) {
3927 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
3928 return;
3929 }
3930 if (JvmtiVTMSTransitionDisabler::VTMS_notify_jvmti_events()) {
3931 JvmtiVTMSTransitionDisabler::VTMS_vthread_start(vthread);
3932 } else {
3933 // set VTMS transition bit value in JavaThread and java.lang.VirtualThread object
3934 JvmtiVTMSTransitionDisabler::set_is_in_VTMS_transition(thread, vthread, false);
3935 }
3936 #endif
3937 JVM_END
3938
3939 JVM_ENTRY(void, JVM_VirtualThreadEnd(JNIEnv* env, jobject vthread))
3940 #if INCLUDE_JVMTI
3941 if (!DoJVMTIVirtualThreadTransitions) {
3942 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
3943 return;
3944 }
3945 if (JvmtiVTMSTransitionDisabler::VTMS_notify_jvmti_events()) {
3946 JvmtiVTMSTransitionDisabler::VTMS_vthread_end(vthread);
3947 } else {
3948 // set VTMS transition bit value in JavaThread and java.lang.VirtualThread object
3949 JvmtiVTMSTransitionDisabler::set_is_in_VTMS_transition(thread, vthread, true);
3950 }
3951 #endif
3952 JVM_END
3953
3954 // If notifications are disabled then just update the VTMS transition bit and return.
3955 // Otherwise, the bit is updated in the given jvmtiVTMSTransitionDisabler function call.
3956 JVM_ENTRY(void, JVM_VirtualThreadMount(JNIEnv* env, jobject vthread, jboolean hide))
3957 #if INCLUDE_JVMTI
3958 if (!DoJVMTIVirtualThreadTransitions) {
3959 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
3960 return;
3961 }
3962 if (JvmtiVTMSTransitionDisabler::VTMS_notify_jvmti_events()) {
3963 JvmtiVTMSTransitionDisabler::VTMS_vthread_mount(vthread, hide);
3964 } else {
3965 // set VTMS transition bit value in JavaThread and java.lang.VirtualThread object
3966 JvmtiVTMSTransitionDisabler::set_is_in_VTMS_transition(thread, vthread, hide);
3967 }
3968 #endif
3969 JVM_END
3970
3971 // If notifications are disabled then just update the VTMS transition bit and return.
3972 // Otherwise, the bit is updated in the given jvmtiVTMSTransitionDisabler function call below.
3973 JVM_ENTRY(void, JVM_VirtualThreadUnmount(JNIEnv* env, jobject vthread, jboolean hide))
3974 #if INCLUDE_JVMTI
3975 if (!DoJVMTIVirtualThreadTransitions) {
3976 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
3977 return;
3978 }
3979 if (JvmtiVTMSTransitionDisabler::VTMS_notify_jvmti_events()) {
3980 JvmtiVTMSTransitionDisabler::VTMS_vthread_unmount(vthread, hide);
3981 } else {
3982 // set VTMS transition bit value in JavaThread and java.lang.VirtualThread object
3983 JvmtiVTMSTransitionDisabler::set_is_in_VTMS_transition(thread, vthread, hide);
3984 }
3985 #endif
3986 JVM_END
3987
3988 // Always update the temporary VTMS transition bit.
3989 JVM_ENTRY(void, JVM_VirtualThreadHideFrames(JNIEnv* env, jclass clazz, jboolean hide))
3990 #if INCLUDE_JVMTI
3991 if (!DoJVMTIVirtualThreadTransitions) {
3992 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
3993 return;
3994 }
3995 assert(!thread->is_in_VTMS_transition(), "sanity check");
3996 assert(thread->is_in_tmp_VTMS_transition() != (bool)hide, "sanity check");
3997 thread->toggle_is_in_tmp_VTMS_transition();
3998 #endif
3999 JVM_END
4000
4001 // Notification from VirtualThread about disabling JVMTI Suspend in a sync critical section.
4002 // Needed to avoid deadlocks with JVMTI suspend mechanism.
4003 JVM_ENTRY(void, JVM_VirtualThreadDisableSuspend(JNIEnv* env, jclass clazz, jboolean enter))
4004 #if INCLUDE_JVMTI
4005 if (!DoJVMTIVirtualThreadTransitions) {
4006 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
4007 return;
4008 }
4009 assert(thread->is_disable_suspend() != (bool)enter,
4010 "nested or unbalanced monitor enter/exit is not allowed");
4011 thread->toggle_is_disable_suspend();
4012 #endif
4013 JVM_END
4014
4015 /*
4016 * Return the current class's class file version. The low order 16 bits of the
4017 * returned jint contain the class's major version. The high order 16 bits
4018 * contain the class's minor version.
4019 */
4020 JVM_ENTRY(jint, JVM_GetClassFileVersion(JNIEnv* env, jclass current))
4021 oop mirror = JNIHandles::resolve_non_null(current);
4022 if (java_lang_Class::is_primitive(mirror)) {
4023 // return latest major version and minor version of 0.
4024 return JVM_CLASSFILE_MAJOR_VERSION;
4025 }
4026 assert(!java_lang_Class::as_Klass(mirror)->is_array_klass(), "unexpected array class");
4027
4028 Klass* c = java_lang_Class::as_Klass(mirror);
4029 assert(c->is_instance_klass(), "must be");
4030 InstanceKlass* ik = InstanceKlass::cast(c);
4031 return (ik->minor_version() << 16) | ik->major_version();
4032 JVM_END
4033
4034 /*
4035 * Ensure that code doing a stackwalk and using javaVFrame::locals() to
4036 * get the value will see a materialized value and not a scalar-replaced
4037 * null value.
4038 */
4039 JVM_ENTRY(void, JVM_EnsureMaterializedForStackWalk_func(JNIEnv* env, jobject vthread, jobject value))
4040 JVM_EnsureMaterializedForStackWalk(env, value);
4041 JVM_END
4042
4043 /*
4044 * Return JNI_TRUE if warnings are printed when agents are dynamically loaded.
4045 */
4046 JVM_LEAF(jboolean, JVM_PrintWarningAtDynamicAgentLoad(void))
4047 return (EnableDynamicAgentLoading && !FLAG_IS_CMDLINE(EnableDynamicAgentLoading)) ? JNI_TRUE : JNI_FALSE;
4048 JVM_END
|
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "cds/cdsConfig.hpp"
27 #include "cds/classListParser.hpp"
28 #include "cds/classListWriter.hpp"
29 #include "cds/classPrelinker.hpp"
30 #include "cds/dynamicArchive.hpp"
31 #include "cds/heapShared.hpp"
32 #include "cds/lambdaFormInvokers.hpp"
33 #include "classfile/classFileStream.hpp"
34 #include "classfile/classLoader.inline.hpp"
35 #include "classfile/classLoaderData.hpp"
36 #include "classfile/classLoaderData.inline.hpp"
37 #include "classfile/classLoadInfo.hpp"
38 #include "classfile/javaAssertions.hpp"
39 #include "classfile/javaClasses.inline.hpp"
40 #include "classfile/moduleEntry.hpp"
41 #include "classfile/modules.hpp"
42 #include "classfile/packageEntry.hpp"
43 #include "classfile/stringTable.hpp"
44 #include "classfile/symbolTable.hpp"
45 #include "classfile/systemDictionary.hpp"
46 #include "classfile/vmClasses.hpp"
47 #include "classfile/vmSymbols.hpp"
48 #include "gc/shared/collectedHeap.inline.hpp"
49 #include "interpreter/bytecode.hpp"
69 #include "prims/jvm_misc.hpp"
70 #include "prims/jvmtiExport.hpp"
71 #include "prims/jvmtiThreadState.inline.hpp"
72 #include "prims/stackwalk.hpp"
73 #include "runtime/arguments.hpp"
74 #include "runtime/atomic.hpp"
75 #include "runtime/continuation.hpp"
76 #include "runtime/globals_extension.hpp"
77 #include "runtime/handles.inline.hpp"
78 #include "runtime/init.hpp"
79 #include "runtime/interfaceSupport.inline.hpp"
80 #include "runtime/deoptimization.hpp"
81 #include "runtime/handshake.hpp"
82 #include "runtime/java.hpp"
83 #include "runtime/javaCalls.hpp"
84 #include "runtime/javaThread.hpp"
85 #include "runtime/jfieldIDWorkaround.hpp"
86 #include "runtime/jniHandles.inline.hpp"
87 #include "runtime/os.inline.hpp"
88 #include "runtime/osThread.hpp"
89 #include "runtime/perfData.inline.hpp"
90 #include "runtime/reflection.hpp"
91 #include "runtime/synchronizer.hpp"
92 #include "runtime/threadIdentifier.hpp"
93 #include "runtime/threadSMR.hpp"
94 #include "runtime/vframe.inline.hpp"
95 #include "runtime/vmOperations.hpp"
96 #include "runtime/vm_version.hpp"
97 #include "services/attachListener.hpp"
98 #include "services/management.hpp"
99 #include "services/threadService.hpp"
100 #include "utilities/checkedCast.hpp"
101 #include "utilities/copy.hpp"
102 #include "utilities/defaultStream.hpp"
103 #include "utilities/dtrace.hpp"
104 #include "utilities/events.hpp"
105 #include "utilities/macros.hpp"
106 #include "utilities/utf8.hpp"
107 #include "utilities/zipLibrary.hpp"
108 #if INCLUDE_CDS
109 #include "classfile/systemDictionaryShared.hpp"
227 if (source_file != nullptr) {
228 log_debug(class, resolve)("%s %s %s:%d (%s)", from, to, source_file, line_number, trace);
229 } else {
230 log_debug(class, resolve)("%s %s (%s)", from, to, trace);
231 }
232 }
233 }
234 }
235
236 void trace_class_resolution(Klass* to_class) {
237 EXCEPTION_MARK;
238 trace_class_resolution_impl(to_class, THREAD);
239 if (HAS_PENDING_EXCEPTION) {
240 CLEAR_PENDING_EXCEPTION;
241 }
242 }
243
244 // java.lang.System //////////////////////////////////////////////////////////////////////
245
246
247 JVM_LEAF_PROF(jlong, JVM_CurrentTimeMillis, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
248 return os::javaTimeMillis();
249 JVM_END
250
251 JVM_LEAF_PROF(jlong, JVM_NanoTime, JVM_NanoTime(JNIEnv *env, jclass ignored))
252 return os::javaTimeNanos();
253 JVM_END
254
255 // The function below is actually exposed by jdk.internal.misc.VM and not
256 // java.lang.System, but we choose to keep it here so that it stays next
257 // to JVM_CurrentTimeMillis and JVM_NanoTime
258
259 const jlong MAX_DIFF_SECS = CONST64(0x0100000000); // 2^32
260 const jlong MIN_DIFF_SECS = -MAX_DIFF_SECS; // -2^32
261
262 JVM_LEAF_PROF(jlong, JVM_GetNanoTimeAdjustment, JVM_GetNanoTimeAdjustment(JNIEnv *env, jclass ignored, jlong offset_secs))
263 jlong seconds;
264 jlong nanos;
265
266 os::javaTimeSystemUTC(seconds, nanos);
267
268 // We're going to verify that the result can fit in a long.
269 // For that we need the difference in seconds between 'seconds'
270 // and 'offset_secs' to be such that:
271 // |seconds - offset_secs| < (2^63/10^9)
272 // We're going to approximate 10^9 ~< 2^30 (1000^3 ~< 1024^3)
273 // which makes |seconds - offset_secs| < 2^33
274 // and we will prefer +/- 2^32 as the maximum acceptable diff
275 // as 2^32 has a more natural feel than 2^33...
276 //
277 // So if |seconds - offset_secs| >= 2^32 - we return a special
278 // sentinel value (-1) which the caller should take as an
279 // exception value indicating that the offset given to us is
280 // too far from range of the current time - leading to too big
281 // a nano adjustment. The caller is expected to recover by
282 // computing a more accurate offset and calling this method
283 // again. (For the record 2^32 secs is ~136 years, so that
284 // should rarely happen)
285 //
286 jlong diff = seconds - offset_secs;
287 if (diff >= MAX_DIFF_SECS || diff <= MIN_DIFF_SECS) {
288 return -1; // sentinel value: the offset is too far off the target
289 }
290
291 // return the adjustment. If you compute a time by adding
292 // this number of nanoseconds along with the number of seconds
293 // in the offset you should get the current UTC time.
294 return (diff * (jlong)1000000000) + nanos;
295 JVM_END
296
297 JVM_ENTRY_PROF(void, JVM_ArrayCopy, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
298 jobject dst, jint dst_pos, jint length))
299 // Check if we have null pointers
300 if (src == nullptr || dst == nullptr) {
301 THROW(vmSymbols::java_lang_NullPointerException());
302 }
303 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
304 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
305 assert(oopDesc::is_oop(s), "JVM_ArrayCopy: src not an oop");
306 assert(oopDesc::is_oop(d), "JVM_ArrayCopy: dst not an oop");
307 // Do copy
308 s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread);
309 JVM_END
310
311
312 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
313 JavaValue r(T_OBJECT);
314 // public synchronized Object put(Object key, Object value);
315 HandleMark hm(THREAD);
316 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK);
317 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != nullptr ? value : ""), CHECK);
318 JavaCalls::call_virtual(&r,
319 props,
320 vmClasses::Properties_klass(),
321 vmSymbols::put_name(),
322 vmSymbols::object_object_object_signature(),
323 key_str,
324 value_str,
325 THREAD);
326 }
327
328
329 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
330
331 /*
332 * Return all of the system properties in a Java String array with alternating
333 * names and values from the jvm SystemProperty.
334 * Which includes some internal and all commandline -D defined properties.
335 */
336 JVM_ENTRY_PROF(jobjectArray, JVM_GetProperties, JVM_GetProperties(JNIEnv *env))
337 ResourceMark rm(THREAD);
338 HandleMark hm(THREAD);
339 int ndx = 0;
340 int fixedCount = 2;
341
342 SystemProperty* p = Arguments::system_properties();
343 int count = Arguments::PropertyList_count(p);
344
345 // Allocate result String array
346 InstanceKlass* ik = vmClasses::String_klass();
347 objArrayOop r = oopFactory::new_objArray(ik, (count + fixedCount) * 2, CHECK_NULL);
348 objArrayHandle result_h(THREAD, r);
349
350 while (p != nullptr) {
351 const char * key = p->key();
352 if (strcmp(key, "sun.nio.MaxDirectMemorySize") != 0) {
353 const char * value = p->value();
354 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK_NULL);
355 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != nullptr ? value : ""), CHECK_NULL);
356 result_h->obj_at_put(ndx * 2, key_str());
404 Handle key_str = java_lang_String::create_from_platform_dependent_str("sun.management.compiler", CHECK_NULL);
405 Handle value_str = java_lang_String::create_from_platform_dependent_str(compiler_name, CHECK_NULL);
406 result_h->obj_at_put(ndx * 2, key_str());
407 result_h->obj_at_put(ndx * 2 + 1, value_str());
408 ndx++;
409 }
410 }
411
412 return (jobjectArray) JNIHandles::make_local(THREAD, result_h());
413 JVM_END
414
415
416 /*
417 * Return the temporary directory that the VM uses for the attach
418 * and perf data files.
419 *
420 * It is important that this directory is well-known and the
421 * same for all VM instances. It cannot be affected by configuration
422 * variables such as java.io.tmpdir.
423 */
424 JVM_ENTRY_PROF(jstring, JVM_GetTemporaryDirectory, JVM_GetTemporaryDirectory(JNIEnv *env))
425 HandleMark hm(THREAD);
426 const char* temp_dir = os::get_temp_directory();
427 Handle h = java_lang_String::create_from_platform_dependent_str(temp_dir, CHECK_NULL);
428 return (jstring) JNIHandles::make_local(THREAD, h());
429 JVM_END
430
431
432 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
433
434 extern volatile jint vm_created;
435
436 JVM_ENTRY_NO_ENV_PROF(void, JVM_BeforeHalt, JVM_BeforeHalt())
437 EventShutdown event;
438 if (event.should_commit()) {
439 event.set_reason("Shutdown requested from Java");
440 event.commit();
441 }
442 JVM_END
443
444
445 JVM_ENTRY_NO_ENV_PROF(void, JVM_Halt, JVM_Halt(jint code))
446 before_exit(thread, true);
447 vm_exit(code);
448 JVM_END
449
450
451 JVM_ENTRY_NO_ENV_PROF(void, JVM_GC, JVM_GC(void))
452 if (!DisableExplicitGC) {
453 EventSystemGC event;
454 event.set_invokedConcurrent(ExplicitGCInvokesConcurrent);
455 Universe::heap()->collect(GCCause::_java_lang_system_gc);
456 event.commit();
457 }
458 JVM_END
459
460
461 JVM_LEAF_PROF(jlong, JVM_MaxObjectInspectionAge, JVM_MaxObjectInspectionAge(void))
462 return Universe::heap()->millis_since_last_whole_heap_examined();
463 JVM_END
464
465
466 static inline jlong convert_size_t_to_jlong(size_t val) {
467 // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
468 NOT_LP64 (return (jlong)val;)
469 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
470 }
471
472 JVM_ENTRY_NO_ENV_PROF(jlong, JVM_TotalMemory, JVM_TotalMemory(void))
473 size_t n = Universe::heap()->capacity();
474 return convert_size_t_to_jlong(n);
475 JVM_END
476
477
478 JVM_ENTRY_NO_ENV_PROF(jlong, JVM_FreeMemory, JVM_FreeMemory(void))
479 size_t n = Universe::heap()->unused();
480 return convert_size_t_to_jlong(n);
481 JVM_END
482
483
484 JVM_ENTRY_NO_ENV_PROF(jlong, JVM_MaxMemory, JVM_MaxMemory(void))
485 size_t n = Universe::heap()->max_capacity();
486 return convert_size_t_to_jlong(n);
487 JVM_END
488
489
490 JVM_ENTRY_NO_ENV_PROF(jint, JVM_ActiveProcessorCount, JVM_ActiveProcessorCount(void))
491 return os::active_processor_count();
492 JVM_END
493
494 JVM_LEAF_PROF(jboolean, JVM_IsUseContainerSupport, JVM_IsUseContainerSupport(void))
495 #ifdef LINUX
496 if (UseContainerSupport) {
497 return JNI_TRUE;
498 }
499 #endif
500 return JNI_FALSE;
501 JVM_END
502
503 JVM_LEAF(jboolean, JVM_IsContainerized(void))
504 #ifdef LINUX
505 if (OSContainer::is_containerized()) {
506 return JNI_TRUE;
507 }
508 #endif
509 return JNI_FALSE;
510 JVM_END
511
512 // java.lang.Throwable //////////////////////////////////////////////////////
513
514 JVM_ENTRY_PROF(void, JVM_FillInStackTrace, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
515 Handle exception(thread, JNIHandles::resolve_non_null(receiver));
516 java_lang_Throwable::fill_in_stack_trace(exception);
517 JVM_END
518
519 // java.lang.NullPointerException ///////////////////////////////////////////
520
521 JVM_ENTRY_PROF(jstring, JVM_GetExtendedNPEMessage, JVM_GetExtendedNPEMessage(JNIEnv *env, jthrowable throwable))
522 if (!ShowCodeDetailsInExceptionMessages) return nullptr;
523
524 oop exc = JNIHandles::resolve_non_null(throwable);
525
526 Method* method;
527 int bci;
528 if (!java_lang_Throwable::get_top_method_and_bci(exc, &method, &bci)) {
529 return nullptr;
530 }
531 if (method->is_native()) {
532 return nullptr;
533 }
534
535 stringStream ss;
536 bool ok = BytecodeUtils::get_NPE_message_at(&ss, method, bci);
537 if (ok) {
538 oop result = java_lang_String::create_oop_from_str(ss.base(), CHECK_NULL);
539 return (jstring) JNIHandles::make_local(THREAD, result);
540 } else {
541 return nullptr;
542 }
543 JVM_END
544
545 // java.lang.StackTraceElement //////////////////////////////////////////////
546
547
548 JVM_ENTRY_PROF(void, JVM_InitStackTraceElementArray, JVM_InitStackTraceElementArray(JNIEnv *env, jobjectArray elements, jobject backtrace, jint depth))
549 Handle backtraceh(THREAD, JNIHandles::resolve(backtrace));
550 objArrayOop st = objArrayOop(JNIHandles::resolve(elements));
551 objArrayHandle stack_trace(THREAD, st);
552 // Fill in the allocated stack trace
553 java_lang_Throwable::get_stack_trace_elements(depth, backtraceh, stack_trace, CHECK);
554 JVM_END
555
556
557 JVM_ENTRY_PROF(void, JVM_InitStackTraceElement, JVM_InitStackTraceElement(JNIEnv* env, jobject element, jobject stackFrameInfo))
558 Handle stack_frame_info(THREAD, JNIHandles::resolve_non_null(stackFrameInfo));
559 Handle stack_trace_element(THREAD, JNIHandles::resolve_non_null(element));
560 java_lang_StackFrameInfo::to_stack_trace_element(stack_frame_info, stack_trace_element, CHECK);
561 JVM_END
562
563
564 // java.lang.StackWalker //////////////////////////////////////////////////////
565 JVM_ENTRY_PROF(void, JVM_ExpandStackFrameInfo, JVM_ExpandStackFrameInfo(JNIEnv *env, jobject obj))
566 Handle stack_frame_info(THREAD, JNIHandles::resolve_non_null(obj));
567
568 bool have_name = (java_lang_StackFrameInfo::name(stack_frame_info()) != nullptr);
569 bool have_type = (java_lang_StackFrameInfo::type(stack_frame_info()) != nullptr);
570 Method* method = java_lang_StackFrameInfo::get_method(stack_frame_info());
571 if (!have_name) {
572 oop name = StringTable::intern(method->name(), CHECK);
573 java_lang_StackFrameInfo::set_name(stack_frame_info(), name);
574 }
575 if (!have_type) {
576 Handle type = java_lang_String::create_from_symbol(method->signature(), CHECK);
577 java_lang_StackFrameInfo::set_type(stack_frame_info(), type());
578 }
579 JVM_END
580
581 JVM_ENTRY_PROF(jobject, JVM_CallStackWalk, JVM_CallStackWalk(JNIEnv *env, jobject stackStream, jint mode,
582 jint skip_frames, jobject contScope, jobject cont,
583 jint buffer_size, jint start_index, jobjectArray frames))
584 if (!thread->has_last_Java_frame()) {
585 THROW_MSG_(vmSymbols::java_lang_InternalError(), "doStackWalk: no stack trace", nullptr);
586 }
587
588 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
589 Handle contScope_h(THREAD, JNIHandles::resolve(contScope));
590 Handle cont_h(THREAD, JNIHandles::resolve(cont));
591 // frames array is a ClassFrameInfo[] array when only getting caller reference,
592 // and a StackFrameInfo[] array (or derivative) otherwise. It should never
593 // be null.
594 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
595 objArrayHandle frames_array_h(THREAD, fa);
596
597 if (frames_array_h->length() < buffer_size) {
598 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers", nullptr);
599 }
600
601 oop result = StackWalk::walk(stackStream_h, mode, skip_frames, contScope_h, cont_h,
602 buffer_size, start_index, frames_array_h, CHECK_NULL);
603 return JNIHandles::make_local(THREAD, result);
604 JVM_END
605
606
607 JVM_ENTRY_PROF(jint, JVM_MoreStackWalk, JVM_MoreStackWalk(JNIEnv *env, jobject stackStream, jint mode, jlong anchor,
608 jint last_batch_count, jint buffer_size, jint start_index,
609 jobjectArray frames))
610 // frames array is a ClassFrameInfo[] array when only getting caller reference,
611 // and a StackFrameInfo[] array (or derivative) otherwise. It should never
612 // be null.
613 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
614 objArrayHandle frames_array_h(THREAD, fa);
615
616 if (frames_array_h->length() < buffer_size) {
617 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers");
618 }
619
620 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
621 return StackWalk::fetchNextBatch(stackStream_h, mode, anchor, last_batch_count, buffer_size,
622 start_index, frames_array_h, THREAD);
623 JVM_END
624
625 JVM_ENTRY_PROF(void, JVM_SetStackWalkContinuation, JVM_SetStackWalkContinuation(JNIEnv *env, jobject stackStream, jlong anchor, jobjectArray frames, jobject cont))
626 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
627 objArrayHandle frames_array_h(THREAD, fa);
628 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
629 Handle cont_h(THREAD, JNIHandles::resolve_non_null(cont));
630
631 StackWalk::setContinuation(stackStream_h, anchor, frames_array_h, cont_h, THREAD);
632 JVM_END
633
634 // java.lang.Object ///////////////////////////////////////////////
635
636
637 JVM_ENTRY_PROF(jint, JVM_IHashCode, JVM_IHashCode(JNIEnv* env, jobject handle))
638 // as implemented in the classic virtual machine; return 0 if object is null
639 return handle == nullptr ? 0 :
640 checked_cast<jint>(ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)));
641 JVM_END
642
643
644 JVM_ENTRY_PROF(void, JVM_MonitorWait, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
645 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
646 JavaThreadInObjectWaitState jtiows(thread, ms != 0);
647 if (JvmtiExport::should_post_monitor_wait()) {
648 JvmtiExport::post_monitor_wait(thread, obj(), ms);
649
650 // The current thread already owns the monitor and it has not yet
651 // been added to the wait queue so the current thread cannot be
652 // made the successor. This means that the JVMTI_EVENT_MONITOR_WAIT
653 // event handler cannot accidentally consume an unpark() meant for
654 // the ParkEvent associated with this ObjectMonitor.
655 }
656 ObjectSynchronizer::wait(obj, ms, CHECK);
657 JVM_END
658
659
660 JVM_ENTRY_PROF(void, JVM_MonitorNotify, JVM_MonitorNotify(JNIEnv* env, jobject handle))
661 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
662 ObjectSynchronizer::notify(obj, CHECK);
663 JVM_END
664
665
666 JVM_ENTRY_PROF(void, JVM_MonitorNotifyAll, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
667 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
668 ObjectSynchronizer::notifyall(obj, CHECK);
669 JVM_END
670
671
672 JVM_ENTRY_PROF(jobject, JVM_Clone, JVM_Clone(JNIEnv* env, jobject handle))
673 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
674 Klass* klass = obj->klass();
675 JvmtiVMObjectAllocEventCollector oam;
676
677 #ifdef ASSERT
678 // Just checking that the cloneable flag is set correct
679 if (obj->is_array()) {
680 guarantee(klass->is_cloneable(), "all arrays are cloneable");
681 } else {
682 guarantee(obj->is_instance(), "should be instanceOop");
683 bool cloneable = klass->is_subtype_of(vmClasses::Cloneable_klass());
684 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
685 }
686 #endif
687
688 // Check if class of obj supports the Cloneable interface.
689 // All arrays are considered to be cloneable (See JLS 20.1.5).
690 // All j.l.r.Reference classes are considered non-cloneable.
691 if (!klass->is_cloneable() ||
692 (klass->is_instance_klass() &&
705 } else {
706 new_obj_oop = Universe::heap()->obj_allocate(klass, size, CHECK_NULL);
707 }
708
709 HeapAccess<>::clone(obj(), new_obj_oop, size);
710
711 Handle new_obj(THREAD, new_obj_oop);
712 // Caution: this involves a java upcall, so the clone should be
713 // "gc-robust" by this stage.
714 if (klass->has_finalizer()) {
715 assert(obj->is_instance(), "should be instanceOop");
716 new_obj_oop = InstanceKlass::register_finalizer(instanceOop(new_obj()), CHECK_NULL);
717 new_obj = Handle(THREAD, new_obj_oop);
718 }
719
720 return JNIHandles::make_local(THREAD, new_obj());
721 JVM_END
722
723 // java.lang.ref.Finalizer ////////////////////////////////////////////////////
724
725 JVM_ENTRY_PROF(void, JVM_ReportFinalizationComplete, JVM_ReportFinalizationComplete(JNIEnv * env, jobject finalizee))
726 MANAGEMENT_ONLY(FinalizerService::on_complete(JNIHandles::resolve_non_null(finalizee), THREAD);)
727 JVM_END
728
729 JVM_LEAF_PROF(jboolean, JVM_IsFinalizationEnabled, JVM_IsFinalizationEnabled(JNIEnv * env))
730 return InstanceKlass::is_finalization_enabled();
731 JVM_END
732
733 // jdk.internal.vm.Continuation /////////////////////////////////////////////////////
734
735 JVM_ENTRY_PROF(void, JVM_RegisterContinuationMethods, JVM_RegisterContinuationMethods(JNIEnv *env, jclass cls))
736 CONT_RegisterNativeMethods(env, cls);
737 JVM_END
738
739 // java.io.File ///////////////////////////////////////////////////////////////
740
741 JVM_LEAF_PROF(char*, JVM_NativePath, JVM_NativePath(char* path))
742 return os::native_path(path);
743 JVM_END
744
745
746 // Misc. class handling ///////////////////////////////////////////////////////////
747
748
749 JVM_ENTRY_PROF(jclass, JVM_GetCallerClass, JVM_GetCallerClass(JNIEnv* env))
750 // Getting the class of the caller frame.
751 //
752 // The call stack at this point looks something like this:
753 //
754 // [0] [ @CallerSensitive public jdk.internal.reflect.Reflection.getCallerClass ]
755 // [1] [ @CallerSensitive API.method ]
756 // [.] [ (skipped intermediate frames) ]
757 // [n] [ caller ]
758 vframeStream vfst(thread);
759 // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass
760 for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) {
761 Method* m = vfst.method();
762 assert(m != nullptr, "sanity");
763 switch (n) {
764 case 0:
765 // This must only be called from Reflection.getCallerClass
766 if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) {
767 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass");
768 }
769 // fall-through
770 case 1:
771 // Frame 0 and 1 must be caller sensitive.
772 if (!m->caller_sensitive()) {
773 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n));
774 }
775 break;
776 default:
777 if (!m->is_ignored_by_security_stack_walk()) {
778 // We have reached the desired frame; return the holder class.
779 return (jclass) JNIHandles::make_local(THREAD, m->method_holder()->java_mirror());
780 }
781 break;
782 }
783 }
784 return nullptr;
785 JVM_END
786
787
788 JVM_ENTRY_PROF(jclass, JVM_FindPrimitiveClass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
789 oop mirror = nullptr;
790 BasicType t = name2type(utf);
791 if (t != T_ILLEGAL && !is_reference_type(t)) {
792 mirror = Universe::java_mirror(t);
793 }
794 if (mirror == nullptr) {
795 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
796 } else {
797 return (jclass) JNIHandles::make_local(THREAD, mirror);
798 }
799 JVM_END
800
801
802 // Returns a class loaded by the bootstrap class loader; or null
803 // if not found. ClassNotFoundException is not thrown.
804 // FindClassFromBootLoader is exported to the launcher for windows.
805 JVM_ENTRY_PROF(jclass, JVM_FindClassFromBootLoader, JVM_FindClassFromBootLoader(JNIEnv* env, const char* name))
806 // Java libraries should ensure that name is never null or illegal.
807 if (name == nullptr || (int)strlen(name) > Symbol::max_length()) {
808 // It's impossible to create this class; the name cannot fit
809 // into the constant pool.
810 return nullptr;
811 }
812 assert(UTF8::is_legal_utf8((const unsigned char*)name, (int)strlen(name), false), "illegal UTF name");
813
814 TempNewSymbol h_name = SymbolTable::new_symbol(name);
815 Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
816 if (k == nullptr) {
817 return nullptr;
818 }
819
820 if (log_is_enabled(Debug, class, resolve)) {
821 trace_class_resolution(k);
822 }
823 return (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
824 JVM_END
825
826 // Find a class with this name in this loader, using the caller's protection domain.
827 JVM_ENTRY_PROF(jclass, JVM_FindClassFromCaller, JVM_FindClassFromCaller(JNIEnv* env, const char* name,
828 jboolean init, jobject loader,
829 jclass caller))
830 TempNewSymbol h_name =
831 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_ClassNotFoundException(),
832 CHECK_NULL);
833
834 oop loader_oop = JNIHandles::resolve(loader);
835 oop from_class = JNIHandles::resolve(caller);
836 oop protection_domain = nullptr;
837 // If loader is null, shouldn't call ClassLoader.checkPackageAccess; otherwise get
838 // NPE. Put it in another way, the bootstrap class loader has all permission and
839 // thus no checkPackageAccess equivalence in the VM class loader.
840 // The caller is also passed as null by the java code if there is no security
841 // manager to avoid the performance cost of getting the calling class.
842 if (from_class != nullptr && loader_oop != nullptr) {
843 protection_domain = java_lang_Class::as_Klass(from_class)->protection_domain();
844 }
845
846 Handle h_loader(THREAD, loader_oop);
847 Handle h_prot(THREAD, protection_domain);
848 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
849 h_prot, false, THREAD);
850
851 if (log_is_enabled(Debug, class, resolve) && result != nullptr) {
852 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
853 }
854 return result;
855 JVM_END
856
857 // Currently only called from the old verifier.
858 JVM_ENTRY_PROF(jclass, JVM_FindClassFromClass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
859 jboolean init, jclass from))
860 TempNewSymbol h_name =
861 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_ClassNotFoundException(),
862 CHECK_NULL);
863 oop from_class_oop = JNIHandles::resolve(from);
864 Klass* from_class = (from_class_oop == nullptr)
865 ? (Klass*)nullptr
866 : java_lang_Class::as_Klass(from_class_oop);
867 oop class_loader = nullptr;
868 oop protection_domain = nullptr;
869 if (from_class != nullptr) {
870 class_loader = from_class->class_loader();
871 protection_domain = from_class->protection_domain();
872 }
873 Handle h_loader(THREAD, class_loader);
874 Handle h_prot (THREAD, protection_domain);
875 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
876 h_prot, true, thread);
877
878 if (log_is_enabled(Debug, class, resolve) && result != nullptr) {
879 // this function is generally only used for class loading during verification.
1042 ik->external_name(),
1043 host_class->external_name(),
1044 ik->is_hidden() ? "is hidden" : "is not hidden");
1045 }
1046 }
1047
1048 if ((!is_hidden || is_nestmate) && !Reflection::is_same_class_package(lookup_k, ik)) {
1049 // non-hidden class or nestmate class must be in the same package as the Lookup class
1050 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Lookup class and defined class are in different packages");
1051 }
1052
1053 if (init) {
1054 ik->initialize(CHECK_NULL);
1055 } else {
1056 ik->link_class(CHECK_NULL);
1057 }
1058
1059 return (jclass) JNIHandles::make_local(THREAD, ik->java_mirror());
1060 }
1061
1062 JVM_ENTRY_PROF(jclass, JVM_DefineClass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
1063 return jvm_define_class_common(name, loader, buf, len, pd, nullptr, THREAD);
1064 JVM_END
1065
1066 /*
1067 * Define a class with the specified lookup class.
1068 * lookup: Lookup class
1069 * name: the name of the class
1070 * buf: class bytes
1071 * len: length of class bytes
1072 * pd: protection domain
1073 * init: initialize the class
1074 * flags: properties of the class
1075 * classData: private static pre-initialized field
1076 */
1077 JVM_ENTRY_PROF(jclass, JVM_LookupDefineClass, JVM_LookupDefineClass(JNIEnv *env, jclass lookup, const char *name, const jbyte *buf,
1078 jsize len, jobject pd, jboolean initialize, int flags, jobject classData))
1079
1080 if (lookup == nullptr) {
1081 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Lookup class is null");
1082 }
1083
1084 assert(buf != nullptr, "buf must not be null");
1085
1086 return jvm_lookup_define_class(lookup, name, buf, len, pd, initialize, flags, classData, THREAD);
1087 JVM_END
1088
1089 JVM_ENTRY_PROF(jclass, JVM_DefineClassWithSource, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
1090 return jvm_define_class_common(name, loader, buf, len, pd, source, THREAD);
1091 JVM_END
1092
1093 JVM_ENTRY_PROF(jclass, JVM_FindLoadedClass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
1094 ResourceMark rm(THREAD);
1095
1096 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
1097 char* str = java_lang_String::as_utf8_string(h_name());
1098
1099 // Sanity check, don't expect null
1100 if (str == nullptr) return nullptr;
1101
1102 // Internalize the string, converting '.' to '/' in string.
1103 char* p = (char*)str;
1104 while (*p != '\0') {
1105 if (*p == '.') {
1106 *p = '/';
1107 }
1108 p++;
1109 }
1110
1111 const int str_len = (int)(p - str);
1112 if (str_len > Symbol::max_length()) {
1113 // It's impossible to create this class; the name cannot fit
1119 // Security Note:
1120 // The Java level wrapper will perform the necessary security check allowing
1121 // us to pass the null as the initiating class loader.
1122 Handle h_loader(THREAD, JNIHandles::resolve(loader));
1123 Klass* k = SystemDictionary::find_instance_or_array_klass(THREAD, klass_name,
1124 h_loader,
1125 Handle());
1126 #if INCLUDE_CDS
1127 if (k == nullptr) {
1128 // If the class is not already loaded, try to see if it's in the shared
1129 // archive for the current classloader (h_loader).
1130 k = SystemDictionaryShared::find_or_load_shared_class(klass_name, h_loader, CHECK_NULL);
1131 }
1132 #endif
1133 return (k == nullptr) ? nullptr :
1134 (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
1135 JVM_END
1136
1137 // Module support //////////////////////////////////////////////////////////////////////////////
1138
1139 JVM_ENTRY_PROF(void, JVM_DefineModule, JVM_DefineModule(JNIEnv *env, jobject module, jboolean is_open, jstring version,
1140 jstring location, jobjectArray packages))
1141 Handle h_module (THREAD, JNIHandles::resolve(module));
1142 Modules::define_module(h_module, is_open, version, location, packages, CHECK);
1143 JVM_END
1144
1145 JVM_ENTRY_PROF(void, JVM_SetBootLoaderUnnamedModule, JVM_SetBootLoaderUnnamedModule(JNIEnv *env, jobject module))
1146 Handle h_module (THREAD, JNIHandles::resolve(module));
1147 Modules::set_bootloader_unnamed_module(h_module, CHECK);
1148 JVM_END
1149
1150 JVM_ENTRY_PROF(void, JVM_AddModuleExports, JVM_AddModuleExports(JNIEnv *env, jobject from_module, jstring package, jobject to_module))
1151 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1152 Handle h_to_module (THREAD, JNIHandles::resolve(to_module));
1153 Modules::add_module_exports_qualified(h_from_module, package, h_to_module, CHECK);
1154 JVM_END
1155
1156 JVM_ENTRY_PROF(void, JVM_AddModuleExportsToAllUnnamed, JVM_AddModuleExportsToAllUnnamed(JNIEnv *env, jobject from_module, jstring package))
1157 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1158 Modules::add_module_exports_to_all_unnamed(h_from_module, package, CHECK);
1159 JVM_END
1160
1161 JVM_ENTRY_PROF(void, JVM_AddModuleExportsToAll, JVM_AddModuleExportsToAll(JNIEnv *env, jobject from_module, jstring package))
1162 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1163 Modules::add_module_exports(h_from_module, package, Handle(), CHECK);
1164 JVM_END
1165
1166 JVM_ENTRY_PROF(void, JVM_AddReadsModule, JVM_AddReadsModule(JNIEnv *env, jobject from_module, jobject source_module))
1167 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1168 Handle h_source_module (THREAD, JNIHandles::resolve(source_module));
1169 Modules::add_reads_module(h_from_module, h_source_module, CHECK);
1170 JVM_END
1171
1172 JVM_ENTRY_PROF(void, JVM_DefineArchivedModules, JVM_DefineArchivedModules(JNIEnv *env, jobject platform_loader, jobject system_loader))
1173 Handle h_platform_loader (THREAD, JNIHandles::resolve(platform_loader));
1174 Handle h_system_loader (THREAD, JNIHandles::resolve(system_loader));
1175 Modules::define_archived_modules(h_platform_loader, h_system_loader, CHECK);
1176 JVM_END
1177
1178 // Reflection support //////////////////////////////////////////////////////////////////////////////
1179
1180 JVM_ENTRY_PROF(jstring, JVM_InitClassName, JVM_InitClassName(JNIEnv *env, jclass cls))
1181 assert (cls != nullptr, "illegal class");
1182 JvmtiVMObjectAllocEventCollector oam;
1183 ResourceMark rm(THREAD);
1184 HandleMark hm(THREAD);
1185 Handle java_class(THREAD, JNIHandles::resolve(cls));
1186 oop result = java_lang_Class::name(java_class, CHECK_NULL);
1187 return (jstring) JNIHandles::make_local(THREAD, result);
1188 JVM_END
1189
1190
1191 JVM_ENTRY_PROF(jobjectArray, JVM_GetClassInterfaces, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
1192 JvmtiVMObjectAllocEventCollector oam;
1193 oop mirror = JNIHandles::resolve_non_null(cls);
1194
1195 // Special handling for primitive objects
1196 if (java_lang_Class::is_primitive(mirror)) {
1197 // Primitive objects does not have any interfaces
1198 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(), 0, CHECK_NULL);
1199 return (jobjectArray) JNIHandles::make_local(THREAD, r);
1200 }
1201
1202 Klass* klass = java_lang_Class::as_Klass(mirror);
1203 // Figure size of result array
1204 int size;
1205 if (klass->is_instance_klass()) {
1206 size = InstanceKlass::cast(klass)->local_interfaces()->length();
1207 } else {
1208 assert(klass->is_objArray_klass() || klass->is_typeArray_klass(), "Illegal mirror klass");
1209 size = 2;
1210 }
1211
1212 // Allocate result array
1213 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(), size, CHECK_NULL);
1214 objArrayHandle result (THREAD, r);
1215 // Fill in result
1216 if (klass->is_instance_klass()) {
1217 // Regular instance klass, fill in all local interfaces
1218 for (int index = 0; index < size; index++) {
1219 Klass* k = InstanceKlass::cast(klass)->local_interfaces()->at(index);
1220 result->obj_at_put(index, k->java_mirror());
1221 }
1222 } else {
1223 // All arrays implement java.lang.Cloneable and java.io.Serializable
1224 result->obj_at_put(0, vmClasses::Cloneable_klass()->java_mirror());
1225 result->obj_at_put(1, vmClasses::Serializable_klass()->java_mirror());
1226 }
1227 return (jobjectArray) JNIHandles::make_local(THREAD, result());
1228 JVM_END
1229
1230
1231 JVM_ENTRY_PROF(jboolean, JVM_IsInterface, JVM_IsInterface(JNIEnv *env, jclass cls))
1232 oop mirror = JNIHandles::resolve_non_null(cls);
1233 if (java_lang_Class::is_primitive(mirror)) {
1234 return JNI_FALSE;
1235 }
1236 Klass* k = java_lang_Class::as_Klass(mirror);
1237 jboolean result = k->is_interface();
1238 assert(!result || k->is_instance_klass(),
1239 "all interfaces are instance types");
1240 // The compiler intrinsic for isInterface tests the
1241 // Klass::_access_flags bits in the same way.
1242 return result;
1243 JVM_END
1244
1245 JVM_ENTRY_PROF(jboolean, JVM_IsHiddenClass, JVM_IsHiddenClass(JNIEnv *env, jclass cls))
1246 oop mirror = JNIHandles::resolve_non_null(cls);
1247 if (java_lang_Class::is_primitive(mirror)) {
1248 return JNI_FALSE;
1249 }
1250 Klass* k = java_lang_Class::as_Klass(mirror);
1251 return k->is_hidden();
1252 JVM_END
1253
1254 JVM_ENTRY_PROF(jobjectArray, JVM_GetClassSigners, JVM_GetClassSigners(JNIEnv *env, jclass cls))
1255 JvmtiVMObjectAllocEventCollector oam;
1256 oop mirror = JNIHandles::resolve_non_null(cls);
1257 if (java_lang_Class::is_primitive(mirror)) {
1258 // There are no signers for primitive types
1259 return nullptr;
1260 }
1261
1262 objArrayHandle signers(THREAD, java_lang_Class::signers(mirror));
1263
1264 // If there are no signers set in the class, or if the class
1265 // is an array, return null.
1266 if (signers == nullptr) return nullptr;
1267
1268 // copy of the signers array
1269 Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass();
1270 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1271 for (int index = 0; index < signers->length(); index++) {
1272 signers_copy->obj_at_put(index, signers->obj_at(index));
1273 }
1274
1275 // return the copy
1276 return (jobjectArray) JNIHandles::make_local(THREAD, signers_copy);
1277 JVM_END
1278
1279
1280 JVM_ENTRY_PROF(void, JVM_SetClassSigners, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1281 oop mirror = JNIHandles::resolve_non_null(cls);
1282 if (!java_lang_Class::is_primitive(mirror)) {
1283 // This call is ignored for primitive types and arrays.
1284 // Signers are only set once, ClassLoader.java, and thus shouldn't
1285 // be called with an array. Only the bootstrap loader creates arrays.
1286 Klass* k = java_lang_Class::as_Klass(mirror);
1287 if (k->is_instance_klass()) {
1288 java_lang_Class::set_signers(k->java_mirror(), objArrayOop(JNIHandles::resolve(signers)));
1289 }
1290 }
1291 JVM_END
1292
1293
1294 JVM_ENTRY_PROF(jobject, JVM_GetProtectionDomain, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1295 oop mirror = JNIHandles::resolve_non_null(cls);
1296 if (mirror == nullptr) {
1297 THROW_(vmSymbols::java_lang_NullPointerException(), nullptr);
1298 }
1299
1300 if (java_lang_Class::is_primitive(mirror)) {
1301 // Primitive types does not have a protection domain.
1302 return nullptr;
1303 }
1304
1305 oop pd = java_lang_Class::protection_domain(mirror);
1306 return (jobject) JNIHandles::make_local(THREAD, pd);
1307 JVM_END
1308
1309
1310 // Returns the inherited_access_control_context field of the running thread.
1311 JVM_ENTRY_PROF(jobject, JVM_GetInheritedAccessControlContext, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1312 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1313 return JNIHandles::make_local(THREAD, result);
1314 JVM_END
1315
1316 JVM_ENTRY_PROF(jobject, JVM_GetStackAccessControlContext, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1317 if (!UsePrivilegedStack) return nullptr;
1318
1319 ResourceMark rm(THREAD);
1320 GrowableArray<Handle>* local_array = new GrowableArray<Handle>(12);
1321 JvmtiVMObjectAllocEventCollector oam;
1322
1323 // count the protection domains on the execution stack. We collapse
1324 // duplicate consecutive protection domains into a single one, as
1325 // well as stopping when we hit a privileged frame.
1326
1327 oop previous_protection_domain = nullptr;
1328 Handle privileged_context(thread, nullptr);
1329 bool is_privileged = false;
1330 oop protection_domain = nullptr;
1331
1332 // Iterate through Java frames
1333 vframeStream vfst(thread);
1334 for(; !vfst.at_end(); vfst.next()) {
1335 // get method of frame
1336 Method* method = vfst.method();
1380 local_array->length(), CHECK_NULL);
1381 objArrayHandle h_context(thread, context);
1382 for (int index = 0; index < local_array->length(); index++) {
1383 h_context->obj_at_put(index, local_array->at(index)());
1384 }
1385
1386 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1387
1388 return JNIHandles::make_local(THREAD, result);
1389 JVM_END
1390
1391 class ScopedValueBindingsResolver {
1392 public:
1393 InstanceKlass* Carrier_klass;
1394 ScopedValueBindingsResolver(JavaThread* THREAD) {
1395 Klass *k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_ScopedValue_Carrier(), true, THREAD);
1396 Carrier_klass = InstanceKlass::cast(k);
1397 }
1398 };
1399
1400 JVM_ENTRY_PROF(jobject, JVM_FindScopedValueBindings, JVM_FindScopedValueBindings(JNIEnv *env, jclass cls))
1401 ResourceMark rm(THREAD);
1402 GrowableArray<Handle>* local_array = new GrowableArray<Handle>(12);
1403 JvmtiVMObjectAllocEventCollector oam;
1404
1405 static ScopedValueBindingsResolver resolver(THREAD);
1406
1407 // Iterate through Java frames
1408 vframeStream vfst(thread);
1409 for(; !vfst.at_end(); vfst.next()) {
1410 int loc = -1;
1411 // get method of frame
1412 Method* method = vfst.method();
1413
1414 Symbol *name = method->name();
1415
1416 InstanceKlass* holder = method->method_holder();
1417 if (name == vmSymbols::runWith_method_name()) {
1418 if (holder == vmClasses::Thread_klass()
1419 || holder == resolver.Carrier_klass) {
1420 loc = 1;
1421 }
1422 }
1423
1424 if (loc != -1) {
1425 javaVFrame *frame = vfst.asJavaVFrame();
1426 StackValueCollection* locals = frame->locals();
1427 StackValue* head_sv = locals->at(loc); // java/lang/ScopedValue$Snapshot
1428 Handle result = head_sv->get_obj();
1429 assert(!head_sv->obj_is_scalar_replaced(), "found scalar-replaced object");
1430 if (result() != nullptr) {
1431 return JNIHandles::make_local(THREAD, result());
1432 }
1433 }
1434 }
1435
1436 return nullptr;
1437 JVM_END
1438
1439 JVM_ENTRY_PROF(jboolean, JVM_IsArrayClass, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1440 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1441 return (k != nullptr) && k->is_array_klass() ? true : false;
1442 JVM_END
1443
1444
1445 JVM_ENTRY_PROF(jboolean, JVM_IsPrimitiveClass, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1446 oop mirror = JNIHandles::resolve_non_null(cls);
1447 return (jboolean) java_lang_Class::is_primitive(mirror);
1448 JVM_END
1449
1450
1451 JVM_ENTRY_PROF(jint, JVM_GetClassModifiers, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1452 oop mirror = JNIHandles::resolve_non_null(cls);
1453 if (java_lang_Class::is_primitive(mirror)) {
1454 // Primitive type
1455 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1456 }
1457
1458 Klass* k = java_lang_Class::as_Klass(mirror);
1459 debug_only(int computed_modifiers = k->compute_modifier_flags());
1460 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1461 return k->modifier_flags();
1462 JVM_END
1463
1464
1465 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1466
1467 JVM_ENTRY_PROF(jobjectArray, JVM_GetDeclaredClasses, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1468 JvmtiVMObjectAllocEventCollector oam;
1469 // ofClass is a reference to a java_lang_Class object. The mirror object
1470 // of an InstanceKlass
1471 oop ofMirror = JNIHandles::resolve_non_null(ofClass);
1472 if (java_lang_Class::is_primitive(ofMirror) ||
1473 ! java_lang_Class::as_Klass(ofMirror)->is_instance_klass()) {
1474 oop result = oopFactory::new_objArray(vmClasses::Class_klass(), 0, CHECK_NULL);
1475 return (jobjectArray)JNIHandles::make_local(THREAD, result);
1476 }
1477
1478 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(ofMirror));
1479 InnerClassesIterator iter(k);
1480
1481 if (iter.length() == 0) {
1482 // Neither an inner nor outer class
1483 oop result = oopFactory::new_objArray(vmClasses::Class_klass(), 0, CHECK_NULL);
1484 return (jobjectArray)JNIHandles::make_local(THREAD, result);
1485 }
1486
1487 // find inner class info
1513 result->obj_at_put(members, inner_klass->java_mirror());
1514 members++;
1515 }
1516 }
1517 }
1518 }
1519
1520 if (members != length) {
1521 // Return array of right length
1522 objArrayOop res = oopFactory::new_objArray(vmClasses::Class_klass(), members, CHECK_NULL);
1523 for(int i = 0; i < members; i++) {
1524 res->obj_at_put(i, result->obj_at(i));
1525 }
1526 return (jobjectArray)JNIHandles::make_local(THREAD, res);
1527 }
1528
1529 return (jobjectArray)JNIHandles::make_local(THREAD, result());
1530 JVM_END
1531
1532
1533 JVM_ENTRY_PROF(jclass, JVM_GetDeclaringClass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1534 {
1535 // ofClass is a reference to a java_lang_Class object.
1536 oop ofMirror = JNIHandles::resolve_non_null(ofClass);
1537 if (java_lang_Class::is_primitive(ofMirror)) {
1538 return nullptr;
1539 }
1540 Klass* klass = java_lang_Class::as_Klass(ofMirror);
1541 if (!klass->is_instance_klass()) {
1542 return nullptr;
1543 }
1544
1545 bool inner_is_member = false;
1546 Klass* outer_klass
1547 = InstanceKlass::cast(klass)->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1548 if (outer_klass == nullptr) return nullptr; // already a top-level class
1549 if (!inner_is_member) return nullptr; // a hidden class (inside a method)
1550 return (jclass) JNIHandles::make_local(THREAD, outer_klass->java_mirror());
1551 }
1552 JVM_END
1553
1554 JVM_ENTRY_PROF(jstring, JVM_GetSimpleBinaryName, JVM_GetSimpleBinaryName(JNIEnv *env, jclass cls))
1555 {
1556 oop mirror = JNIHandles::resolve_non_null(cls);
1557 if (java_lang_Class::is_primitive(mirror)) {
1558 return nullptr;
1559 }
1560 Klass* klass = java_lang_Class::as_Klass(mirror);
1561 if (!klass->is_instance_klass()) {
1562 return nullptr;
1563 }
1564 InstanceKlass* k = InstanceKlass::cast(klass);
1565 int ooff = 0, noff = 0;
1566 if (k->find_inner_classes_attr(&ooff, &noff, THREAD)) {
1567 if (noff != 0) {
1568 constantPoolHandle i_cp(thread, k->constants());
1569 Symbol* name = i_cp->symbol_at(noff);
1570 Handle str = java_lang_String::create_from_symbol(name, CHECK_NULL);
1571 return (jstring) JNIHandles::make_local(THREAD, str());
1572 }
1573 }
1574 return nullptr;
1575 }
1576 JVM_END
1577
1578 JVM_ENTRY_PROF(jstring, JVM_GetClassSignature, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1579 assert (cls != nullptr, "illegal class");
1580 JvmtiVMObjectAllocEventCollector oam;
1581 ResourceMark rm(THREAD);
1582 oop mirror = JNIHandles::resolve_non_null(cls);
1583 // Return null for arrays and primitives
1584 if (!java_lang_Class::is_primitive(mirror)) {
1585 Klass* k = java_lang_Class::as_Klass(mirror);
1586 if (k->is_instance_klass()) {
1587 Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1588 if (sym == nullptr) return nullptr;
1589 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1590 return (jstring) JNIHandles::make_local(THREAD, str());
1591 }
1592 }
1593 return nullptr;
1594 JVM_END
1595
1596
1597 JVM_ENTRY_PROF(jbyteArray, JVM_GetClassAnnotations, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1598 assert (cls != nullptr, "illegal class");
1599 oop mirror = JNIHandles::resolve_non_null(cls);
1600 // Return null for arrays and primitives
1601 if (!java_lang_Class::is_primitive(mirror)) {
1602 Klass* k = java_lang_Class::as_Klass(mirror);
1603 if (k->is_instance_klass()) {
1604 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1605 return (jbyteArray) JNIHandles::make_local(THREAD, a);
1606 }
1607 }
1608 return nullptr;
1609 JVM_END
1610
1611
1612 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd) {
1613 // some of this code was adapted from from jni_FromReflectedField
1614
1615 oop reflected = JNIHandles::resolve_non_null(field);
1616 oop mirror = java_lang_reflect_Field::clazz(reflected);
1617 Klass* k = java_lang_Class::as_Klass(mirror);
1646 int slot = 0;
1647
1648 if (reflected->klass() == vmClasses::reflect_Constructor_klass()) {
1649 mirror = java_lang_reflect_Constructor::clazz(reflected);
1650 slot = java_lang_reflect_Constructor::slot(reflected);
1651 } else {
1652 assert(reflected->klass() == vmClasses::reflect_Method_klass(),
1653 "wrong type");
1654 mirror = java_lang_reflect_Method::clazz(reflected);
1655 slot = java_lang_reflect_Method::slot(reflected);
1656 }
1657 Klass* k = java_lang_Class::as_Klass(mirror);
1658
1659 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1660 assert(m != nullptr, "cannot find method");
1661 return m; // caller has to deal with null in product mode
1662 }
1663
1664 /* Type use annotations support (JDK 1.8) */
1665
1666 JVM_ENTRY_PROF(jbyteArray, JVM_GetClassTypeAnnotations, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1667 assert (cls != nullptr, "illegal class");
1668 ResourceMark rm(THREAD);
1669 // Return null for arrays and primitives
1670 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1671 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1672 if (k->is_instance_klass()) {
1673 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1674 if (type_annotations != nullptr) {
1675 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1676 return (jbyteArray) JNIHandles::make_local(THREAD, a);
1677 }
1678 }
1679 }
1680 return nullptr;
1681 JVM_END
1682
1683 JVM_ENTRY_PROF(jbyteArray, JVM_GetMethodTypeAnnotations, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1684 assert (method != nullptr, "illegal method");
1685 // method is a handle to a java.lang.reflect.Method object
1686 Method* m = jvm_get_method_common(method);
1687 if (m == nullptr) {
1688 return nullptr;
1689 }
1690
1691 AnnotationArray* type_annotations = m->type_annotations();
1692 if (type_annotations != nullptr) {
1693 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1694 return (jbyteArray) JNIHandles::make_local(THREAD, a);
1695 }
1696
1697 return nullptr;
1698 JVM_END
1699
1700 JVM_ENTRY_PROF(jbyteArray, JVM_GetFieldTypeAnnotations, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1701 assert (field != nullptr, "illegal field");
1702 fieldDescriptor fd;
1703 bool gotFd = jvm_get_field_common(field, fd);
1704 if (!gotFd) {
1705 return nullptr;
1706 }
1707
1708 return (jbyteArray) JNIHandles::make_local(THREAD, Annotations::make_java_array(fd.type_annotations(), THREAD));
1709 JVM_END
1710
1711 static void bounds_check(const constantPoolHandle& cp, jint index, TRAPS) {
1712 if (!cp->is_within_bounds(index)) {
1713 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1714 }
1715 }
1716
1717 JVM_ENTRY_PROF(jobjectArray, JVM_GetMethodParameters, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1718 {
1719 // method is a handle to a java.lang.reflect.Method object
1720 Method* method_ptr = jvm_get_method_common(method);
1721 methodHandle mh (THREAD, method_ptr);
1722 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1723 const int num_params = mh->method_parameters_length();
1724
1725 if (num_params < 0) {
1726 // A -1 return value from method_parameters_length means there is no
1727 // parameter data. Return null to indicate this to the reflection
1728 // API.
1729 assert(num_params == -1, "num_params should be -1 if it is less than zero");
1730 return (jobjectArray)nullptr;
1731 } else {
1732 // Otherwise, we return something up to reflection, even if it is
1733 // a zero-length array. Why? Because in some cases this can
1734 // trigger a MalformedParametersException.
1735
1736 // make sure all the symbols are properly formatted
1737 for (int i = 0; i < num_params; i++) {
1750 objArrayOop result_oop = oopFactory::new_objArray(vmClasses::reflect_Parameter_klass(), num_params, CHECK_NULL);
1751 objArrayHandle result (THREAD, result_oop);
1752
1753 for (int i = 0; i < num_params; i++) {
1754 MethodParametersElement* params = mh->method_parameters_start();
1755 // For a 0 index, give a null symbol
1756 Symbol* sym = 0 != params[i].name_cp_index ?
1757 mh->constants()->symbol_at(params[i].name_cp_index) : nullptr;
1758 int flags = params[i].flags;
1759 oop param = Reflection::new_parameter(reflected_method, i, sym,
1760 flags, CHECK_NULL);
1761 result->obj_at_put(i, param);
1762 }
1763 return (jobjectArray)JNIHandles::make_local(THREAD, result());
1764 }
1765 }
1766 JVM_END
1767
1768 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1769
1770 JVM_ENTRY_PROF(jobjectArray, JVM_GetClassDeclaredFields, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1771 {
1772 JvmtiVMObjectAllocEventCollector oam;
1773
1774 oop ofMirror = JNIHandles::resolve_non_null(ofClass);
1775 // Exclude primitive types and array types
1776 if (java_lang_Class::is_primitive(ofMirror) ||
1777 java_lang_Class::as_Klass(ofMirror)->is_array_klass()) {
1778 // Return empty array
1779 oop res = oopFactory::new_objArray(vmClasses::reflect_Field_klass(), 0, CHECK_NULL);
1780 return (jobjectArray) JNIHandles::make_local(THREAD, res);
1781 }
1782
1783 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(ofMirror));
1784 constantPoolHandle cp(THREAD, k->constants());
1785
1786 // Ensure class is linked
1787 k->link_class(CHECK_NULL);
1788
1789 // Allocate result
1790 int num_fields;
1801 objArrayOop r = oopFactory::new_objArray(vmClasses::reflect_Field_klass(), num_fields, CHECK_NULL);
1802 objArrayHandle result (THREAD, r);
1803
1804 int out_idx = 0;
1805 fieldDescriptor fd;
1806 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1807 if (!publicOnly || fs.access_flags().is_public()) {
1808 fd.reinitialize(k, fs.index());
1809 oop field = Reflection::new_field(&fd, CHECK_NULL);
1810 result->obj_at_put(out_idx, field);
1811 ++out_idx;
1812 }
1813 }
1814 assert(out_idx == num_fields, "just checking");
1815 return (jobjectArray) JNIHandles::make_local(THREAD, result());
1816 }
1817 JVM_END
1818
1819 // A class is a record if and only if it is final and a direct subclass of
1820 // java.lang.Record and has a Record attribute; otherwise, it is not a record.
1821 JVM_ENTRY_PROF(jboolean, JVM_IsRecord, JVM_IsRecord(JNIEnv *env, jclass cls))
1822 {
1823 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1824 if (k != nullptr && k->is_instance_klass()) {
1825 InstanceKlass* ik = InstanceKlass::cast(k);
1826 return ik->is_record();
1827 } else {
1828 return false;
1829 }
1830 }
1831 JVM_END
1832
1833 // Returns an array containing the components of the Record attribute,
1834 // or null if the attribute is not present.
1835 //
1836 // Note that this function returns the components of the Record attribute
1837 // even if the class is not a record.
1838 JVM_ENTRY_PROF(jobjectArray, JVM_GetRecordComponents, JVM_GetRecordComponents(JNIEnv* env, jclass ofClass))
1839 {
1840 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass));
1841 assert(c->is_instance_klass(), "must be");
1842 InstanceKlass* ik = InstanceKlass::cast(c);
1843
1844 Array<RecordComponent*>* components = ik->record_components();
1845 if (components != nullptr) {
1846 JvmtiVMObjectAllocEventCollector oam;
1847 constantPoolHandle cp(THREAD, ik->constants());
1848 int length = components->length();
1849 assert(length >= 0, "unexpected record_components length");
1850 objArrayOop record_components =
1851 oopFactory::new_objArray(vmClasses::RecordComponent_klass(), length, CHECK_NULL);
1852 objArrayHandle components_h (THREAD, record_components);
1853
1854 for (int x = 0; x < length; x++) {
1855 RecordComponent* component = components->at(x);
1856 assert(component != nullptr, "unexpected null record component");
1857 oop component_oop = java_lang_reflect_RecordComponent::create(ik, component, CHECK_NULL);
1858 components_h->obj_at_put(x, component_oop);
1925 for (int i = 0; i < num_methods; i++) {
1926 methodHandle method(THREAD, k->method_with_idnum(idnums->at(i)));
1927 if (method.is_null()) {
1928 // Method may have been deleted and seems this API can handle null
1929 // Otherwise should probably put a method that throws NSME
1930 result->obj_at_put(i, nullptr);
1931 } else {
1932 oop m;
1933 if (want_constructor) {
1934 m = Reflection::new_constructor(method, CHECK_NULL);
1935 } else {
1936 m = Reflection::new_method(method, false, CHECK_NULL);
1937 }
1938 result->obj_at_put(i, m);
1939 }
1940 }
1941
1942 return (jobjectArray) JNIHandles::make_local(THREAD, result());
1943 }
1944
1945 JVM_ENTRY_PROF(jobjectArray, JVM_GetClassDeclaredMethods, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1946 {
1947 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1948 /*want_constructor*/ false,
1949 vmClasses::reflect_Method_klass(), THREAD);
1950 }
1951 JVM_END
1952
1953 JVM_ENTRY_PROF(jobjectArray, JVM_GetClassDeclaredConstructors, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1954 {
1955 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1956 /*want_constructor*/ true,
1957 vmClasses::reflect_Constructor_klass(), THREAD);
1958 }
1959 JVM_END
1960
1961 JVM_ENTRY_PROF(jint, JVM_GetClassAccessFlags, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1962 {
1963 oop mirror = JNIHandles::resolve_non_null(cls);
1964 if (java_lang_Class::is_primitive(mirror)) {
1965 // Primitive type
1966 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1967 }
1968
1969 Klass* k = java_lang_Class::as_Klass(mirror);
1970 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1971 }
1972 JVM_END
1973
1974 JVM_ENTRY_PROF(jboolean, JVM_AreNestMates, JVM_AreNestMates(JNIEnv *env, jclass current, jclass member))
1975 {
1976 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1977 assert(c->is_instance_klass(), "must be");
1978 InstanceKlass* ck = InstanceKlass::cast(c);
1979 Klass* m = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(member));
1980 assert(m->is_instance_klass(), "must be");
1981 InstanceKlass* mk = InstanceKlass::cast(m);
1982 return ck->has_nestmate_access_to(mk, THREAD);
1983 }
1984 JVM_END
1985
1986 JVM_ENTRY_PROF(jclass, JVM_GetNestHost, JVM_GetNestHost(JNIEnv* env, jclass current))
1987 {
1988 // current is not a primitive or array class
1989 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1990 assert(c->is_instance_klass(), "must be");
1991 InstanceKlass* ck = InstanceKlass::cast(c);
1992 InstanceKlass* host = ck->nest_host(THREAD);
1993 return (jclass) (host == nullptr ? nullptr :
1994 JNIHandles::make_local(THREAD, host->java_mirror()));
1995 }
1996 JVM_END
1997
1998 JVM_ENTRY_PROF(jobjectArray, JVM_GetNestMembers, JVM_GetNestMembers(JNIEnv* env, jclass current))
1999 {
2000 // current is not a primitive or array class
2001 ResourceMark rm(THREAD);
2002 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
2003 assert(c->is_instance_klass(), "must be");
2004 InstanceKlass* ck = InstanceKlass::cast(c);
2005 InstanceKlass* host = ck->nest_host(THREAD);
2006
2007 log_trace(class, nestmates)("Calling GetNestMembers for type %s with nest-host %s",
2008 ck->external_name(), host->external_name());
2009 {
2010 JvmtiVMObjectAllocEventCollector oam;
2011 Array<u2>* members = host->nest_members();
2012 int length = members == nullptr ? 0 : members->length();
2013
2014 log_trace(class, nestmates)(" - host has %d listed nest members", length);
2015
2016 // nest host is first in the array so make it one bigger
2017 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(),
2018 length + 1, CHECK_NULL);
2058 log_trace(class, nestmates)(" - compacting array from length %d to %d",
2059 length + 1, count + 1);
2060
2061 objArrayOop r2 = oopFactory::new_objArray(vmClasses::Class_klass(),
2062 count + 1, CHECK_NULL);
2063 objArrayHandle result2(THREAD, r2);
2064 for (int i = 0; i < count + 1; i++) {
2065 result2->obj_at_put(i, result->obj_at(i));
2066 }
2067 return (jobjectArray)JNIHandles::make_local(THREAD, result2());
2068 }
2069 }
2070 else {
2071 assert(host == ck || ck->is_hidden(), "must be singleton nest or dynamic nestmate");
2072 }
2073 return (jobjectArray)JNIHandles::make_local(THREAD, result());
2074 }
2075 }
2076 JVM_END
2077
2078 JVM_ENTRY_PROF(jobjectArray, JVM_GetPermittedSubclasses, JVM_GetPermittedSubclasses(JNIEnv* env, jclass current))
2079 {
2080 oop mirror = JNIHandles::resolve_non_null(current);
2081 assert(!java_lang_Class::is_primitive(mirror), "should not be");
2082 Klass* c = java_lang_Class::as_Klass(mirror);
2083 assert(c->is_instance_klass(), "must be");
2084 InstanceKlass* ik = InstanceKlass::cast(c);
2085 ResourceMark rm(THREAD);
2086 log_trace(class, sealed)("Calling GetPermittedSubclasses for %s type %s",
2087 ik->is_sealed() ? "sealed" : "non-sealed", ik->external_name());
2088 if (ik->is_sealed()) {
2089 JvmtiVMObjectAllocEventCollector oam;
2090 Array<u2>* subclasses = ik->permitted_subclasses();
2091 int length = subclasses->length();
2092
2093 log_trace(class, sealed)(" - sealed class has %d permitted subclasses", length);
2094
2095 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(),
2096 length, CHECK_NULL);
2097 objArrayHandle result(THREAD, r);
2098 int count = 0;
2121 }
2122 if (count < length) {
2123 // we had invalid entries so we need to compact the array
2124 objArrayOop r2 = oopFactory::new_objArray(vmClasses::Class_klass(),
2125 count, CHECK_NULL);
2126 objArrayHandle result2(THREAD, r2);
2127 for (int i = 0; i < count; i++) {
2128 result2->obj_at_put(i, result->obj_at(i));
2129 }
2130 return (jobjectArray)JNIHandles::make_local(THREAD, result2());
2131 }
2132 return (jobjectArray)JNIHandles::make_local(THREAD, result());
2133 } else {
2134 return nullptr;
2135 }
2136 }
2137 JVM_END
2138
2139 // Constant pool access //////////////////////////////////////////////////////////
2140
2141 JVM_ENTRY_PROF(jobject, JVM_GetClassConstantPool, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
2142 {
2143 JvmtiVMObjectAllocEventCollector oam;
2144 oop mirror = JNIHandles::resolve_non_null(cls);
2145 // Return null for primitives and arrays
2146 if (!java_lang_Class::is_primitive(mirror)) {
2147 Klass* k = java_lang_Class::as_Klass(mirror);
2148 if (k->is_instance_klass()) {
2149 InstanceKlass* k_h = InstanceKlass::cast(k);
2150 Handle jcp = reflect_ConstantPool::create(CHECK_NULL);
2151 reflect_ConstantPool::set_cp(jcp(), k_h->constants());
2152 return JNIHandles::make_local(THREAD, jcp());
2153 }
2154 }
2155 return nullptr;
2156 }
2157 JVM_END
2158
2159
2160 JVM_ENTRY_PROF(jint, JVM_ConstantPoolGetSize, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
2161 {
2162 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2163 return cp->length();
2164 }
2165 JVM_END
2166
2167
2168 JVM_ENTRY_PROF(jclass, JVM_ConstantPoolGetClassAt, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2169 {
2170 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2171 bounds_check(cp, index, CHECK_NULL);
2172 constantTag tag = cp->tag_at(index);
2173 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
2174 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2175 }
2176 Klass* k = cp->klass_at(index, CHECK_NULL);
2177 return (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
2178 }
2179 JVM_END
2180
2181 JVM_ENTRY_PROF(jclass, JVM_ConstantPoolGetClassAtIfLoaded, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2182 {
2183 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2184 bounds_check(cp, index, CHECK_NULL);
2185 constantTag tag = cp->tag_at(index);
2186 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
2187 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2188 }
2189 Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
2190 if (k == nullptr) return nullptr;
2191 return (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
2192 }
2193 JVM_END
2194
2195 static jobject get_method_at_helper(const constantPoolHandle& cp, jint index, bool force_resolution, TRAPS) {
2196 constantTag tag = cp->tag_at(index);
2197 if (!tag.is_method() && !tag.is_interface_method()) {
2198 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2199 }
2200 int klass_ref = cp->uncached_klass_ref_index_at(index);
2201 Klass* k_o;
2204 } else {
2205 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2206 if (k_o == nullptr) return nullptr;
2207 }
2208 InstanceKlass* k = InstanceKlass::cast(k_o);
2209 Symbol* name = cp->uncached_name_ref_at(index);
2210 Symbol* sig = cp->uncached_signature_ref_at(index);
2211 methodHandle m (THREAD, k->find_method(name, sig));
2212 if (m.is_null()) {
2213 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
2214 }
2215 oop method;
2216 if (!m->is_initializer() || m->is_static()) {
2217 method = Reflection::new_method(m, true, CHECK_NULL);
2218 } else {
2219 method = Reflection::new_constructor(m, CHECK_NULL);
2220 }
2221 return JNIHandles::make_local(THREAD, method);
2222 }
2223
2224 JVM_ENTRY_PROF(jobject, JVM_ConstantPoolGetMethodAt, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2225 {
2226 JvmtiVMObjectAllocEventCollector oam;
2227 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2228 bounds_check(cp, index, CHECK_NULL);
2229 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
2230 return res;
2231 }
2232 JVM_END
2233
2234 JVM_ENTRY_PROF(jobject, JVM_ConstantPoolGetMethodAtIfLoaded, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2235 {
2236 JvmtiVMObjectAllocEventCollector oam;
2237 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2238 bounds_check(cp, index, CHECK_NULL);
2239 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
2240 return res;
2241 }
2242 JVM_END
2243
2244 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2245 constantTag tag = cp->tag_at(index);
2246 if (!tag.is_field()) {
2247 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2248 }
2249 int klass_ref = cp->uncached_klass_ref_index_at(index);
2250 Klass* k_o;
2251 if (force_resolution) {
2252 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2253 } else {
2254 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2255 if (k_o == nullptr) return nullptr;
2256 }
2257 InstanceKlass* k = InstanceKlass::cast(k_o);
2258 Symbol* name = cp->uncached_name_ref_at(index);
2259 Symbol* sig = cp->uncached_signature_ref_at(index);
2260 fieldDescriptor fd;
2261 Klass* target_klass = k->find_field(name, sig, &fd);
2262 if (target_klass == nullptr) {
2263 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2264 }
2265 oop field = Reflection::new_field(&fd, CHECK_NULL);
2266 return JNIHandles::make_local(THREAD, field);
2267 }
2268
2269 JVM_ENTRY_PROF(jobject, JVM_ConstantPoolGetFieldAt, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
2270 {
2271 JvmtiVMObjectAllocEventCollector oam;
2272 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2273 bounds_check(cp, index, CHECK_NULL);
2274 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2275 return res;
2276 }
2277 JVM_END
2278
2279 JVM_ENTRY_PROF(jobject, JVM_ConstantPoolGetFieldAtIfLoaded, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2280 {
2281 JvmtiVMObjectAllocEventCollector oam;
2282 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2283 bounds_check(cp, index, CHECK_NULL);
2284 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2285 return res;
2286 }
2287 JVM_END
2288
2289 JVM_ENTRY_PROF(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2290 {
2291 JvmtiVMObjectAllocEventCollector oam;
2292 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2293 bounds_check(cp, index, CHECK_NULL);
2294 constantTag tag = cp->tag_at(index);
2295 if (!tag.is_field_or_method()) {
2296 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2297 }
2298 int klass_ref = cp->uncached_klass_ref_index_at(index);
2299 Symbol* klass_name = cp->klass_name_at(klass_ref);
2300 Symbol* member_name = cp->uncached_name_ref_at(index);
2301 Symbol* member_sig = cp->uncached_signature_ref_at(index);
2302 objArrayOop dest_o = oopFactory::new_objArray(vmClasses::String_klass(), 3, CHECK_NULL);
2303 objArrayHandle dest(THREAD, dest_o);
2304 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2305 dest->obj_at_put(0, str());
2306 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2307 dest->obj_at_put(1, str());
2308 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2309 dest->obj_at_put(2, str());
2310 return (jobjectArray) JNIHandles::make_local(THREAD, dest());
2311 }
2312 JVM_END
2313
2314 JVM_ENTRY_PROF(jint, JVM_ConstantPoolGetClassRefIndexAt, JVM_ConstantPoolGetClassRefIndexAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2315 {
2316 JvmtiVMObjectAllocEventCollector oam;
2317 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2318 bounds_check(cp, index, CHECK_0);
2319 constantTag tag = cp->tag_at(index);
2320 if (!tag.is_field_or_method()) {
2321 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2322 }
2323 return (jint) cp->uncached_klass_ref_index_at(index);
2324 }
2325 JVM_END
2326
2327 JVM_ENTRY_PROF(jint, JVM_ConstantPoolGetNameAndTypeRefIndexAt, JVM_ConstantPoolGetNameAndTypeRefIndexAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2328 {
2329 JvmtiVMObjectAllocEventCollector oam;
2330 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2331 bounds_check(cp, index, CHECK_0);
2332 constantTag tag = cp->tag_at(index);
2333 if (!tag.is_invoke_dynamic() && !tag.is_field_or_method()) {
2334 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2335 }
2336 return (jint) cp->uncached_name_and_type_ref_index_at(index);
2337 }
2338 JVM_END
2339
2340 JVM_ENTRY_PROF(jobjectArray, JVM_ConstantPoolGetNameAndTypeRefInfoAt, JVM_ConstantPoolGetNameAndTypeRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2341 {
2342 JvmtiVMObjectAllocEventCollector oam;
2343 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2344 bounds_check(cp, index, CHECK_NULL);
2345 constantTag tag = cp->tag_at(index);
2346 if (!tag.is_name_and_type()) {
2347 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2348 }
2349 Symbol* member_name = cp->symbol_at(cp->name_ref_index_at(index));
2350 Symbol* member_sig = cp->symbol_at(cp->signature_ref_index_at(index));
2351 objArrayOop dest_o = oopFactory::new_objArray(vmClasses::String_klass(), 2, CHECK_NULL);
2352 objArrayHandle dest(THREAD, dest_o);
2353 Handle str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2354 dest->obj_at_put(0, str());
2355 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2356 dest->obj_at_put(1, str());
2357 return (jobjectArray) JNIHandles::make_local(THREAD, dest());
2358 }
2359 JVM_END
2360
2361 JVM_ENTRY_PROF(jint, JVM_ConstantPoolGetIntAt, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2362 {
2363 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2364 bounds_check(cp, index, CHECK_0);
2365 constantTag tag = cp->tag_at(index);
2366 if (!tag.is_int()) {
2367 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2368 }
2369 return cp->int_at(index);
2370 }
2371 JVM_END
2372
2373 JVM_ENTRY_PROF(jlong, JVM_ConstantPoolGetLongAt, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2374 {
2375 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2376 bounds_check(cp, index, CHECK_(0L));
2377 constantTag tag = cp->tag_at(index);
2378 if (!tag.is_long()) {
2379 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2380 }
2381 return cp->long_at(index);
2382 }
2383 JVM_END
2384
2385 JVM_ENTRY_PROF(jfloat, JVM_ConstantPoolGetFloatAt, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2386 {
2387 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2388 bounds_check(cp, index, CHECK_(0.0f));
2389 constantTag tag = cp->tag_at(index);
2390 if (!tag.is_float()) {
2391 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2392 }
2393 return cp->float_at(index);
2394 }
2395 JVM_END
2396
2397 JVM_ENTRY_PROF(jdouble, JVM_ConstantPoolGetDoubleAt, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2398 {
2399 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2400 bounds_check(cp, index, CHECK_(0.0));
2401 constantTag tag = cp->tag_at(index);
2402 if (!tag.is_double()) {
2403 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2404 }
2405 return cp->double_at(index);
2406 }
2407 JVM_END
2408
2409 JVM_ENTRY_PROF(jstring, JVM_ConstantPoolGetStringAt, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2410 {
2411 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2412 bounds_check(cp, index, CHECK_NULL);
2413 constantTag tag = cp->tag_at(index);
2414 if (!tag.is_string()) {
2415 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2416 }
2417 oop str = cp->string_at(index, CHECK_NULL);
2418 return (jstring) JNIHandles::make_local(THREAD, str);
2419 }
2420 JVM_END
2421
2422 JVM_ENTRY_PROF(jstring, JVM_ConstantPoolGetUTF8At, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
2423 {
2424 JvmtiVMObjectAllocEventCollector oam;
2425 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2426 bounds_check(cp, index, CHECK_NULL);
2427 constantTag tag = cp->tag_at(index);
2428 if (!tag.is_symbol()) {
2429 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2430 }
2431 Symbol* sym = cp->symbol_at(index);
2432 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2433 return (jstring) JNIHandles::make_local(THREAD, str());
2434 }
2435 JVM_END
2436
2437 JVM_ENTRY_PROF(jbyte, JVM_ConstantPoolGetTagAt, JVM_ConstantPoolGetTagAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2438 {
2439 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2440 bounds_check(cp, index, CHECK_0);
2441 constantTag tag = cp->tag_at(index);
2442 jbyte result = tag.value();
2443 // If returned tag values are not from the JVM spec, e.g. tags from 100 to 105,
2444 // they are changed to the corresponding tags from the JVM spec, so that java code in
2445 // sun.reflect.ConstantPool will return only tags from the JVM spec, not internal ones.
2446 if (tag.is_klass_or_reference()) {
2447 result = JVM_CONSTANT_Class;
2448 } else if (tag.is_string_index()) {
2449 result = JVM_CONSTANT_String;
2450 } else if (tag.is_method_type_in_error()) {
2451 result = JVM_CONSTANT_MethodType;
2452 } else if (tag.is_method_handle_in_error()) {
2453 result = JVM_CONSTANT_MethodHandle;
2454 } else if (tag.is_dynamic_constant_in_error()) {
2455 result = JVM_CONSTANT_Dynamic;
2456 }
2457 return result;
2458 }
2459 JVM_END
2460
2461 // Assertion support. //////////////////////////////////////////////////////////
2462
2463 JVM_ENTRY_PROF(jboolean, JVM_DesiredAssertionStatus, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2464 assert(cls != nullptr, "bad class");
2465
2466 oop r = JNIHandles::resolve(cls);
2467 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2468 if (java_lang_Class::is_primitive(r)) return false;
2469
2470 Klass* k = java_lang_Class::as_Klass(r);
2471 assert(k->is_instance_klass(), "must be an instance klass");
2472 if (!k->is_instance_klass()) return false;
2473
2474 ResourceMark rm(THREAD);
2475 const char* name = k->name()->as_C_string();
2476 bool system_class = k->class_loader() == nullptr;
2477 return JavaAssertions::enabled(name, system_class);
2478
2479 JVM_END
2480
2481
2482 // Return a new AssertionStatusDirectives object with the fields filled in with
2483 // command-line assertion arguments (i.e., -ea, -da).
2484 JVM_ENTRY_PROF(jobject, JVM_AssertionStatusDirectives, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2485 JvmtiVMObjectAllocEventCollector oam;
2486 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2487 return JNIHandles::make_local(THREAD, asd);
2488 JVM_END
2489
2490 // Verification ////////////////////////////////////////////////////////////////////////////////
2491
2492 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2493
2494 // RedefineClasses support: bug 6214132 caused verification to fail.
2495 // All functions from this section should call the jvmtiThreadSate function:
2496 // Klass* class_to_verify_considering_redefinition(Klass* klass).
2497 // The function returns a Klass* of the _scratch_class if the verifier
2498 // was invoked in the middle of the class redefinition.
2499 // Otherwise it returns its argument value which is the _the_class Klass*.
2500 // Please, refer to the description in the jvmtiThreadSate.hpp.
2501
2502 JVM_ENTRY_PROF(const char*, JVM_GetClassNameUTF, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2503 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2504 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2505 return k->name()->as_utf8();
2506 JVM_END
2507
2508
2509 JVM_ENTRY_PROF(void, JVM_GetClassCPTypes, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2510 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2511 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2512 // types will have length zero if this is not an InstanceKlass
2513 // (length is determined by call to JVM_GetClassCPEntriesCount)
2514 if (k->is_instance_klass()) {
2515 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2516 for (int index = cp->length() - 1; index >= 0; index--) {
2517 constantTag tag = cp->tag_at(index);
2518 types[index] = (tag.is_unresolved_klass()) ? (unsigned char) JVM_CONSTANT_Class : tag.value();
2519 }
2520 }
2521 JVM_END
2522
2523
2524 JVM_ENTRY_PROF(jint, JVM_GetClassCPEntriesCount, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2525 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2526 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2527 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->constants()->length();
2528 JVM_END
2529
2530
2531 JVM_ENTRY_PROF(jint, JVM_GetClassFieldsCount, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2532 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2533 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2534 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->java_fields_count();
2535 JVM_END
2536
2537
2538 JVM_ENTRY_PROF(jint, JVM_GetClassMethodsCount, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2539 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2540 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2541 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->methods()->length();
2542 JVM_END
2543
2544
2545 // The following methods, used for the verifier, are never called with
2546 // array klasses, so a direct cast to InstanceKlass is safe.
2547 // Typically, these methods are called in a loop with bounds determined
2548 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2549 // zero for arrays.
2550 JVM_ENTRY_PROF(void, JVM_GetMethodIxExceptionIndexes, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2551 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2552 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2553 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2554 int length = method->checked_exceptions_length();
2555 if (length > 0) {
2556 CheckedExceptionElement* table= method->checked_exceptions_start();
2557 for (int i = 0; i < length; i++) {
2558 exceptions[i] = table[i].class_cp_index;
2559 }
2560 }
2561 JVM_END
2562
2563
2564 JVM_ENTRY_PROF(jint, JVM_GetMethodIxExceptionsCount, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2565 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2566 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2567 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2568 return method->checked_exceptions_length();
2569 JVM_END
2570
2571
2572 JVM_ENTRY_PROF(void, JVM_GetMethodIxByteCode, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2573 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2574 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2575 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2576 memcpy(code, method->code_base(), method->code_size());
2577 JVM_END
2578
2579
2580 JVM_ENTRY_PROF(jint, JVM_GetMethodIxByteCodeLength, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2581 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2582 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2583 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2584 return method->code_size();
2585 JVM_END
2586
2587
2588 JVM_ENTRY_PROF(void, JVM_GetMethodIxExceptionTableEntry, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2589 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2590 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2591 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2592 ExceptionTable extable(method);
2593 entry->start_pc = extable.start_pc(entry_index);
2594 entry->end_pc = extable.end_pc(entry_index);
2595 entry->handler_pc = extable.handler_pc(entry_index);
2596 entry->catchType = extable.catch_type_index(entry_index);
2597 JVM_END
2598
2599
2600 JVM_ENTRY_PROF(jint, JVM_GetMethodIxExceptionTableLength, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2601 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2602 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2603 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2604 return method->exception_table_length();
2605 JVM_END
2606
2607
2608 JVM_ENTRY_PROF(jint, JVM_GetMethodIxModifiers, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2609 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2610 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2611 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2612 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2613 JVM_END
2614
2615
2616 JVM_ENTRY_PROF(jint, JVM_GetFieldIxModifiers, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2617 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2618 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2619 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2620 JVM_END
2621
2622
2623 JVM_ENTRY_PROF(jint, JVM_GetMethodIxLocalsCount, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2624 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2625 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2626 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2627 return method->max_locals();
2628 JVM_END
2629
2630
2631 JVM_ENTRY_PROF(jint, JVM_GetMethodIxArgsSize, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2632 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2633 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2634 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2635 return method->size_of_parameters();
2636 JVM_END
2637
2638
2639 JVM_ENTRY_PROF(jint, JVM_GetMethodIxMaxStack, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2640 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2641 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2642 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2643 return method->verifier_max_stack();
2644 JVM_END
2645
2646
2647 JVM_ENTRY_PROF(jboolean, JVM_IsConstructorIx, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2648 ResourceMark rm(THREAD);
2649 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2650 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2651 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2652 return method->name() == vmSymbols::object_initializer_name();
2653 JVM_END
2654
2655
2656 JVM_ENTRY_PROF(jboolean, JVM_IsVMGeneratedMethodIx, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2657 ResourceMark rm(THREAD);
2658 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2659 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2660 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2661 return method->is_overpass();
2662 JVM_END
2663
2664 JVM_ENTRY_PROF(const char*, JVM_GetMethodIxNameUTF, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2665 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2666 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2667 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2668 return method->name()->as_utf8();
2669 JVM_END
2670
2671
2672 JVM_ENTRY_PROF(const char*, JVM_GetMethodIxSignatureUTF, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2673 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2674 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2675 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2676 return method->signature()->as_utf8();
2677 JVM_END
2678
2679 /**
2680 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2681 * read entries in the constant pool. Since the old verifier always
2682 * works on a copy of the code, it will not see any rewriting that
2683 * may possibly occur in the middle of verification. So it is important
2684 * that nothing it calls tries to use the cpCache instead of the raw
2685 * constant pool, so we must use cp->uncached_x methods when appropriate.
2686 */
2687 JVM_ENTRY_PROF(const char*, JVM_GetCPFieldNameUTF, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2688 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2689 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2690 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2691 switch (cp->tag_at(cp_index).value()) {
2692 case JVM_CONSTANT_Fieldref:
2693 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2694 default:
2695 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2696 }
2697 ShouldNotReachHere();
2698 return nullptr;
2699 JVM_END
2700
2701
2702 JVM_ENTRY_PROF(const char*, JVM_GetCPMethodNameUTF, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2703 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2704 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2705 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2706 switch (cp->tag_at(cp_index).value()) {
2707 case JVM_CONSTANT_InterfaceMethodref:
2708 case JVM_CONSTANT_Methodref:
2709 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2710 default:
2711 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2712 }
2713 ShouldNotReachHere();
2714 return nullptr;
2715 JVM_END
2716
2717
2718 JVM_ENTRY_PROF(const char*, JVM_GetCPMethodSignatureUTF, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2719 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2720 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2721 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2722 switch (cp->tag_at(cp_index).value()) {
2723 case JVM_CONSTANT_InterfaceMethodref:
2724 case JVM_CONSTANT_Methodref:
2725 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2726 default:
2727 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2728 }
2729 ShouldNotReachHere();
2730 return nullptr;
2731 JVM_END
2732
2733
2734 JVM_ENTRY_PROF(const char*, JVM_GetCPFieldSignatureUTF, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2735 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2736 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2737 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2738 switch (cp->tag_at(cp_index).value()) {
2739 case JVM_CONSTANT_Fieldref:
2740 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2741 default:
2742 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2743 }
2744 ShouldNotReachHere();
2745 return nullptr;
2746 JVM_END
2747
2748
2749 JVM_ENTRY_PROF(const char*, JVM_GetCPClassNameUTF, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2750 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2751 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2752 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2753 Symbol* classname = cp->klass_name_at(cp_index);
2754 return classname->as_utf8();
2755 JVM_END
2756
2757
2758 JVM_ENTRY_PROF(const char*, JVM_GetCPFieldClassNameUTF, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2759 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2760 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2761 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2762 switch (cp->tag_at(cp_index).value()) {
2763 case JVM_CONSTANT_Fieldref: {
2764 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2765 Symbol* classname = cp->klass_name_at(class_index);
2766 return classname->as_utf8();
2767 }
2768 default:
2769 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2770 }
2771 ShouldNotReachHere();
2772 return nullptr;
2773 JVM_END
2774
2775
2776 JVM_ENTRY_PROF(const char*, JVM_GetCPMethodClassNameUTF, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2777 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2778 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2779 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2780 switch (cp->tag_at(cp_index).value()) {
2781 case JVM_CONSTANT_Methodref:
2782 case JVM_CONSTANT_InterfaceMethodref: {
2783 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2784 Symbol* classname = cp->klass_name_at(class_index);
2785 return classname->as_utf8();
2786 }
2787 default:
2788 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2789 }
2790 ShouldNotReachHere();
2791 return nullptr;
2792 JVM_END
2793
2794
2795 JVM_ENTRY_PROF(jint, JVM_GetCPFieldModifiers, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2796 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2797 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2798 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2799 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2800 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2801 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2802 switch (cp->tag_at(cp_index).value()) {
2803 case JVM_CONSTANT_Fieldref: {
2804 Symbol* name = cp->uncached_name_ref_at(cp_index);
2805 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2806 InstanceKlass* ik = InstanceKlass::cast(k_called);
2807 for (JavaFieldStream fs(ik); !fs.done(); fs.next()) {
2808 if (fs.name() == name && fs.signature() == signature) {
2809 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2810 }
2811 }
2812 return -1;
2813 }
2814 default:
2815 fatal("JVM_GetCPFieldModifiers: illegal constant");
2816 }
2817 ShouldNotReachHere();
2818 return 0;
2819 JVM_END
2820
2821
2822 JVM_ENTRY_PROF(jint, JVM_GetCPMethodModifiers, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2823 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2824 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2825 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2826 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2827 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2828 switch (cp->tag_at(cp_index).value()) {
2829 case JVM_CONSTANT_Methodref:
2830 case JVM_CONSTANT_InterfaceMethodref: {
2831 Symbol* name = cp->uncached_name_ref_at(cp_index);
2832 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2833 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2834 int methods_count = methods->length();
2835 for (int i = 0; i < methods_count; i++) {
2836 Method* method = methods->at(i);
2837 if (method->name() == name && method->signature() == signature) {
2838 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2839 }
2840 }
2841 return -1;
2842 }
2843 default:
2844 fatal("JVM_GetCPMethodModifiers: illegal constant");
2845 }
2846 ShouldNotReachHere();
2847 return 0;
2848 JVM_END
2849
2850
2851 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2852
2853 JVM_LEAF_PROF(void, JVM_ReleaseUTF, JVM_ReleaseUTF(const char *utf))
2854 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2855 JVM_END
2856
2857
2858 JVM_ENTRY_PROF(jboolean, JVM_IsSameClassPackage, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2859 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2860 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2861 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2862 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2863 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2864 JVM_END
2865
2866 // Printing support //////////////////////////////////////////////////
2867 extern "C" {
2868
2869 ATTRIBUTE_PRINTF(3, 0)
2870 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2871 // Reject count values that are negative signed values converted to
2872 // unsigned; see bug 4399518, 4417214
2873 if ((intptr_t)count <= 0) return -1;
2874
2875 int result = os::vsnprintf(str, count, fmt, args);
2876 if (result > 0 && (size_t)result >= count) {
2877 result = -1;
2878 }
2937 // In most of the JVM thread support functions we need to access the
2938 // thread through a ThreadsListHandle to prevent it from exiting and
2939 // being reclaimed while we try to operate on it. The exceptions to this
2940 // rule are when operating on the current thread, or if the monitor of
2941 // the target java.lang.Thread is locked at the Java level - in both
2942 // cases the target cannot exit.
2943
2944 static void thread_entry(JavaThread* thread, TRAPS) {
2945 HandleMark hm(THREAD);
2946 Handle obj(THREAD, thread->threadObj());
2947 JavaValue result(T_VOID);
2948 JavaCalls::call_virtual(&result,
2949 obj,
2950 vmClasses::Thread_klass(),
2951 vmSymbols::run_method_name(),
2952 vmSymbols::void_method_signature(),
2953 THREAD);
2954 }
2955
2956
2957 JVM_ENTRY_PROF(void, JVM_StartThread, JVM_StartThread(JNIEnv* env, jobject jthread))
2958 #if INCLUDE_CDS
2959 if (CDSConfig::is_dumping_classic_static_archive()) {
2960 // During java -Xshare:dump, if we allow multiple Java threads to
2961 // execute in parallel, symbols and classes may be loaded in
2962 // random orders which will make the resulting CDS archive
2963 // non-deterministic.
2964 //
2965 // Lucikly, during java -Xshare:dump, it's important to run only
2966 // the code in the main Java thread (which is NOT started here) that
2967 // creates the module graph, etc. It's safe to not start the other
2968 // threads which are launched by class static initializers
2969 // (ReferenceHandler, FinalizerThread and CleanerImpl).
2970 if (log_is_enabled(Info, cds)) {
2971 ResourceMark rm;
2972 oop t = JNIHandles::resolve_non_null(jthread);
2973 log_info(cds)("JVM_StartThread() ignored: %s", t->klass()->external_name());
2974 }
2975 return;
2976 }
2977 #endif
2978 JavaThread *native_thread = nullptr;
2979
3033 log_warning(os, thread)("Failed to start the native thread for java.lang.Thread \"%s\"",
3034 JavaThread::name_for(JNIHandles::resolve_non_null(jthread)));
3035 // No one should hold a reference to the 'native_thread'.
3036 native_thread->smr_delete();
3037 if (JvmtiExport::should_post_resource_exhausted()) {
3038 JvmtiExport::post_resource_exhausted(
3039 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
3040 os::native_thread_creation_failed_msg());
3041 }
3042 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
3043 os::native_thread_creation_failed_msg());
3044 }
3045
3046 JFR_ONLY(Jfr::on_java_thread_start(thread, native_thread);)
3047
3048 Thread::start(native_thread);
3049
3050 JVM_END
3051
3052
3053 JVM_ENTRY_PROF(void, JVM_SetThreadPriority, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
3054 ThreadsListHandle tlh(thread);
3055 oop java_thread = nullptr;
3056 JavaThread* receiver = nullptr;
3057 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, &java_thread);
3058 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
3059
3060 if (is_alive) {
3061 // jthread refers to a live JavaThread.
3062 Thread::set_priority(receiver, (ThreadPriority)prio);
3063 }
3064 // Implied else: If the JavaThread hasn't started yet, then the
3065 // priority set in the java.lang.Thread object above will be pushed
3066 // down when it does start.
3067 JVM_END
3068
3069
3070 JVM_LEAF_PROF(void, JVM_Yield, JVM_Yield(JNIEnv *env, jclass threadClass))
3071 if (os::dont_yield()) return;
3072 HOTSPOT_THREAD_YIELD();
3073 os::naked_yield();
3074 JVM_END
3075
3076 JVM_ENTRY_PROF(void, JVM_SleepNanos, JVM_SleepNanos(JNIEnv* env, jclass threadClass, jlong nanos))
3077 if (nanos < 0) {
3078 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "nanosecond timeout value out of range");
3079 }
3080
3081 if (thread->is_interrupted(true) && !HAS_PENDING_EXCEPTION) {
3082 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3083 }
3084
3085 // Save current thread state and restore it at the end of this block.
3086 // And set new thread state to SLEEPING.
3087 JavaThreadSleepState jtss(thread);
3088
3089 HOTSPOT_THREAD_SLEEP_BEGIN(nanos / NANOSECS_PER_MILLISEC);
3090
3091 if (nanos == 0) {
3092 os::naked_yield();
3093 } else {
3094 ThreadState old_state = thread->osthread()->get_state();
3095 thread->osthread()->set_state(SLEEPING);
3096 if (!thread->sleep_nanos(nanos)) { // interrupted
3097 // An asynchronous exception could have been thrown on
3098 // us while we were sleeping. We do not overwrite those.
3099 if (!HAS_PENDING_EXCEPTION) {
3100 HOTSPOT_THREAD_SLEEP_END(1);
3101
3102 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
3103 // to properly restore the thread state. That's likely wrong.
3104 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3105 }
3106 }
3107 thread->osthread()->set_state(old_state);
3108 }
3109 HOTSPOT_THREAD_SLEEP_END(0);
3110 JVM_END
3111
3112 JVM_ENTRY_PROF(jobject, JVM_CurrentCarrierThread, JVM_CurrentCarrierThread(JNIEnv* env, jclass threadClass))
3113 oop jthread = thread->threadObj();
3114 assert(jthread != nullptr, "no current carrier thread!");
3115 return JNIHandles::make_local(THREAD, jthread);
3116 JVM_END
3117
3118 JVM_ENTRY_PROF(jobject, JVM_CurrentThread, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
3119 oop theThread = thread->vthread();
3120 assert(theThread != (oop)nullptr, "no current thread!");
3121 return JNIHandles::make_local(THREAD, theThread);
3122 JVM_END
3123
3124 JVM_ENTRY_PROF(void, JVM_SetCurrentThread, JVM_SetCurrentThread(JNIEnv* env, jobject thisThread,
3125 jobject theThread))
3126 oop threadObj = JNIHandles::resolve(theThread);
3127 thread->set_vthread(threadObj);
3128 JFR_ONLY(Jfr::on_set_current_thread(thread, threadObj);)
3129 JVM_END
3130
3131 JVM_ENTRY_PROF(jlong, JVM_GetNextThreadIdOffset, JVM_GetNextThreadIdOffset(JNIEnv* env, jclass threadClass))
3132 return ThreadIdentifier::unsafe_offset();
3133 JVM_END
3134
3135 JVM_ENTRY_PROF(void, JVM_Interrupt, JVM_Interrupt(JNIEnv* env, jobject jthread))
3136 ThreadsListHandle tlh(thread);
3137 JavaThread* receiver = nullptr;
3138 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, nullptr);
3139 if (is_alive) {
3140 // jthread refers to a live JavaThread.
3141 receiver->interrupt();
3142 }
3143 JVM_END
3144
3145 // Return true iff the current thread has locked the object passed in
3146
3147 JVM_ENTRY_PROF(jboolean, JVM_HoldsLock, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3148 if (obj == nullptr) {
3149 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3150 }
3151 Handle h_obj(THREAD, JNIHandles::resolve(obj));
3152 return ObjectSynchronizer::current_thread_holds_lock(thread, h_obj);
3153 JVM_END
3154
3155 JVM_ENTRY_PROF(jobject, JVM_GetStackTrace, JVM_GetStackTrace(JNIEnv *env, jobject jthread))
3156 oop trace = java_lang_Thread::async_get_stack_trace(JNIHandles::resolve(jthread), THREAD);
3157 return JNIHandles::make_local(THREAD, trace);
3158 JVM_END
3159
3160 JVM_ENTRY_PROF(void, JVM_DumpAllStacks, JVM_DumpAllStacks(JNIEnv* env, jclass))
3161 VM_PrintThreads op;
3162 VMThread::execute(&op);
3163 if (JvmtiExport::should_post_data_dump()) {
3164 JvmtiExport::post_data_dump();
3165 }
3166 JVM_END
3167
3168 JVM_ENTRY_PROF(void, JVM_SetNativeThreadName, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3169 // We don't use a ThreadsListHandle here because the current thread
3170 // must be alive.
3171 oop java_thread = JNIHandles::resolve_non_null(jthread);
3172 JavaThread* thr = java_lang_Thread::thread(java_thread);
3173 if (thread == thr && !thr->has_attached_via_jni()) {
3174 // Thread naming is only supported for the current thread and
3175 // we don't set the name of an attached thread to avoid stepping
3176 // on other programs.
3177 ResourceMark rm(thread);
3178 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3179 os::set_native_thread_name(thread_name);
3180 }
3181 JVM_END
3182
3183 JVM_ENTRY_PROF(jobject, JVM_ScopedValueCache, JVM_ScopedValueCache(JNIEnv* env, jclass threadClass))
3184 oop theCache = thread->scopedValueCache();
3185 return JNIHandles::make_local(THREAD, theCache);
3186 JVM_END
3187
3188 JVM_ENTRY_PROF(void, JVM_SetScopedValueCache, JVM_SetScopedValueCache(JNIEnv* env, jclass threadClass,
3189 jobject theCache))
3190 arrayOop objs = arrayOop(JNIHandles::resolve(theCache));
3191 thread->set_scopedValueCache(objs);
3192 JVM_END
3193
3194 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3195
3196 JVM_ENTRY_PROF(jobjectArray, JVM_GetClassContext, JVM_GetClassContext(JNIEnv *env))
3197 ResourceMark rm(THREAD);
3198 JvmtiVMObjectAllocEventCollector oam;
3199 vframeStream vfst(thread);
3200
3201 if (vmClasses::reflect_CallerSensitive_klass() != nullptr) {
3202 // This must only be called from SecurityManager.getClassContext
3203 Method* m = vfst.method();
3204 if (!(m->method_holder() == vmClasses::SecurityManager_klass() &&
3205 m->name() == vmSymbols::getClassContext_name() &&
3206 m->signature() == vmSymbols::void_class_array_signature())) {
3207 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext");
3208 }
3209 }
3210
3211 // Collect method holders
3212 GrowableArray<Klass*>* klass_array = new GrowableArray<Klass*>();
3213 for (; !vfst.at_end(); vfst.security_next()) {
3214 Method* m = vfst.method();
3215 // Native frames are not returned
3216 if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) {
3217 Klass* holder = m->method_holder();
3218 assert(holder->is_klass(), "just checking");
3219 klass_array->append(holder);
3220 }
3221 }
3222
3223 // Create result array of type [Ljava/lang/Class;
3224 objArrayOop result = oopFactory::new_objArray(vmClasses::Class_klass(), klass_array->length(), CHECK_NULL);
3225 // Fill in mirrors corresponding to method holders
3226 for (int i = 0; i < klass_array->length(); i++) {
3227 result->obj_at_put(i, klass_array->at(i)->java_mirror());
3228 }
3229
3230 return (jobjectArray) JNIHandles::make_local(THREAD, result);
3231 JVM_END
3232
3233
3234 // java.lang.Package ////////////////////////////////////////////////////////////////
3235
3236
3237 JVM_ENTRY_PROF(jstring, JVM_GetSystemPackage, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3238 ResourceMark rm(THREAD);
3239 JvmtiVMObjectAllocEventCollector oam;
3240 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3241 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3242 return (jstring) JNIHandles::make_local(THREAD, result);
3243 JVM_END
3244
3245
3246 JVM_ENTRY_PROF(jobjectArray, JVM_GetSystemPackages, JVM_GetSystemPackages(JNIEnv *env))
3247 JvmtiVMObjectAllocEventCollector oam;
3248 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3249 return (jobjectArray) JNIHandles::make_local(THREAD, result);
3250 JVM_END
3251
3252
3253 // java.lang.ref.Reference ///////////////////////////////////////////////////////////////
3254
3255
3256 JVM_ENTRY_PROF(jobject, JVM_GetAndClearReferencePendingList, JVM_GetAndClearReferencePendingList(JNIEnv* env))
3257 MonitorLocker ml(Heap_lock);
3258 oop ref = Universe::reference_pending_list();
3259 if (ref != nullptr) {
3260 Universe::clear_reference_pending_list();
3261 }
3262 return JNIHandles::make_local(THREAD, ref);
3263 JVM_END
3264
3265 JVM_ENTRY_PROF(jboolean, JVM_HasReferencePendingList, JVM_HasReferencePendingList(JNIEnv* env))
3266 MonitorLocker ml(Heap_lock);
3267 return Universe::has_reference_pending_list();
3268 JVM_END
3269
3270 JVM_ENTRY_PROF(void, JVM_WaitForReferencePendingList, JVM_WaitForReferencePendingList(JNIEnv* env))
3271 MonitorLocker ml(Heap_lock);
3272 while (!Universe::has_reference_pending_list()) {
3273 ml.wait();
3274 }
3275 JVM_END
3276
3277 JVM_ENTRY_PROF(jboolean, JVM_ReferenceRefersTo, JVM_ReferenceRefersTo(JNIEnv* env, jobject ref, jobject o))
3278 oop ref_oop = JNIHandles::resolve_non_null(ref);
3279 // PhantomReference has it's own implementation of refersTo().
3280 // See: JVM_PhantomReferenceRefersTo
3281 assert(!java_lang_ref_Reference::is_phantom(ref_oop), "precondition");
3282 oop referent = java_lang_ref_Reference::weak_referent_no_keepalive(ref_oop);
3283 return referent == JNIHandles::resolve(o);
3284 JVM_END
3285
3286 JVM_ENTRY_PROF(void, JVM_ReferenceClear, JVM_ReferenceClear(JNIEnv* env, jobject ref))
3287 oop ref_oop = JNIHandles::resolve_non_null(ref);
3288 // FinalReference has it's own implementation of clear().
3289 assert(!java_lang_ref_Reference::is_final(ref_oop), "precondition");
3290 if (java_lang_ref_Reference::unknown_referent_no_keepalive(ref_oop) == nullptr) {
3291 // If the referent has already been cleared then done.
3292 // However, if the referent is dead but has not yet been cleared by
3293 // concurrent reference processing, it should NOT be cleared here.
3294 // Instead, clearing should be left to the GC. Clearing it here could
3295 // detectably lose an expected notification, which is impossible with
3296 // STW reference processing. The clearing in enqueue() doesn't have
3297 // this problem, since the enqueue covers the notification, but it's not
3298 // worth the effort to handle that case specially.
3299 return;
3300 }
3301 java_lang_ref_Reference::clear_referent(ref_oop);
3302 JVM_END
3303
3304
3305 // java.lang.ref.PhantomReference //////////////////////////////////////////////////
3306
3307
3308 JVM_ENTRY_PROF(jboolean, JVM_PhantomReferenceRefersTo, JVM_PhantomReferenceRefersTo(JNIEnv* env, jobject ref, jobject o))
3309 oop ref_oop = JNIHandles::resolve_non_null(ref);
3310 oop referent = java_lang_ref_Reference::phantom_referent_no_keepalive(ref_oop);
3311 return referent == JNIHandles::resolve(o);
3312 JVM_END
3313
3314
3315 // ObjectInputStream ///////////////////////////////////////////////////////////////
3316
3317 // Return the first user-defined class loader up the execution stack, or null
3318 // if only code from the bootstrap or platform class loader is on the stack.
3319
3320 JVM_ENTRY_PROF(jobject, JVM_LatestUserDefinedLoader, JVM_LatestUserDefinedLoader(JNIEnv *env))
3321 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3322 InstanceKlass* ik = vfst.method()->method_holder();
3323 oop loader = ik->class_loader();
3324 if (loader != nullptr && !SystemDictionary::is_platform_class_loader(loader)) {
3325 // Skip reflection related frames
3326 if (!ik->is_subclass_of(vmClasses::reflect_SerializationConstructorAccessorImpl_klass())) {
3327 return JNIHandles::make_local(THREAD, loader);
3328 }
3329 }
3330 }
3331 return nullptr;
3332 JVM_END
3333
3334
3335 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3336
3337
3338 // resolve array handle and check arguments
3339 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3340 if (arr == nullptr) {
3341 THROW_0(vmSymbols::java_lang_NullPointerException());
3342 }
3343 oop a = JNIHandles::resolve_non_null(arr);
3344 if (!a->is_array()) {
3345 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3346 } else if (type_array_only && !a->is_typeArray()) {
3347 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array of primitive type");
3348 }
3349 return arrayOop(a);
3350 }
3351
3352
3353 JVM_ENTRY_PROF(jint, JVM_GetArrayLength, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3354 arrayOop a = check_array(env, arr, false, CHECK_0);
3355 return a->length();
3356 JVM_END
3357
3358
3359 JVM_ENTRY_PROF(jobject, JVM_GetArrayElement, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3360 JvmtiVMObjectAllocEventCollector oam;
3361 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3362 jvalue value;
3363 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3364 oop box = Reflection::box(&value, type, CHECK_NULL);
3365 return JNIHandles::make_local(THREAD, box);
3366 JVM_END
3367
3368
3369 JVM_ENTRY_PROF(jvalue, JVM_GetPrimitiveArrayElement, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3370 jvalue value;
3371 value.i = 0; // to initialize value before getting used in CHECK
3372 arrayOop a = check_array(env, arr, true, CHECK_(value));
3373 assert(a->is_typeArray(), "just checking");
3374 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3375 BasicType wide_type = (BasicType) wCode;
3376 if (type != wide_type) {
3377 Reflection::widen(&value, type, wide_type, CHECK_(value));
3378 }
3379 return value;
3380 JVM_END
3381
3382
3383 JVM_ENTRY_PROF(void, JVM_SetArrayElement, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3384 arrayOop a = check_array(env, arr, false, CHECK);
3385 oop box = JNIHandles::resolve(val);
3386 jvalue value;
3387 value.i = 0; // to initialize value before getting used in CHECK
3388 BasicType value_type;
3389 if (a->is_objArray()) {
3390 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3391 value_type = Reflection::unbox_for_regular_object(box, &value);
3392 } else {
3393 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3394 }
3395 Reflection::array_set(&value, a, index, value_type, CHECK);
3396 JVM_END
3397
3398
3399 JVM_ENTRY_PROF(void, JVM_SetPrimitiveArrayElement, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3400 arrayOop a = check_array(env, arr, true, CHECK);
3401 assert(a->is_typeArray(), "just checking");
3402 BasicType value_type = (BasicType) vCode;
3403 Reflection::array_set(&v, a, index, value_type, CHECK);
3404 JVM_END
3405
3406
3407 JVM_ENTRY_PROF(jobject, JVM_NewArray, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3408 JvmtiVMObjectAllocEventCollector oam;
3409 oop element_mirror = JNIHandles::resolve(eltClass);
3410 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3411 return JNIHandles::make_local(THREAD, result);
3412 JVM_END
3413
3414
3415 JVM_ENTRY_PROF(jobject, JVM_NewMultiArray, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3416 JvmtiVMObjectAllocEventCollector oam;
3417 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3418 oop element_mirror = JNIHandles::resolve(eltClass);
3419 assert(dim_array->is_typeArray(), "just checking");
3420 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3421 return JNIHandles::make_local(THREAD, result);
3422 JVM_END
3423
3424
3425 // Library support ///////////////////////////////////////////////////////////////////////////
3426
3427 JVM_LEAF_PROF(void*, JVM_LoadZipLibrary, JVM_LoadZipLibrary())
3428 return ZipLibrary::handle();
3429 JVM_END
3430
3431 JVM_ENTRY_NO_ENV_PROF(void*, JVM_LoadLibrary, JVM_LoadLibrary(const char* name, jboolean throwException))
3432 //%note jvm_ct
3433 char ebuf[1024];
3434 void *load_result;
3435 {
3436 ThreadToNativeFromVM ttnfvm(thread);
3437 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3438 }
3439 if (load_result == nullptr) {
3440 if (throwException) {
3441 char msg[1024];
3442 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3443 // Since 'ebuf' may contain a string encoded using
3444 // platform encoding scheme, we need to pass
3445 // Exceptions::unsafe_to_utf8 to the new_exception method
3446 // as the last argument. See bug 6367357.
3447 Handle h_exception =
3448 Exceptions::new_exception(thread,
3449 vmSymbols::java_lang_UnsatisfiedLinkError(),
3450 msg, Exceptions::unsafe_to_utf8);
3451
3452 THROW_HANDLE_0(h_exception);
3453 } else {
3454 log_info(library)("Failed to load library %s", name);
3455 return load_result;
3456 }
3457 }
3458 log_info(library)("Loaded library %s, handle " INTPTR_FORMAT, name, p2i(load_result));
3459 return load_result;
3460 JVM_END
3461
3462
3463 JVM_LEAF_PROF(void, JVM_UnloadLibrary, JVM_UnloadLibrary(void* handle))
3464 os::dll_unload(handle);
3465 log_info(library)("Unloaded library with handle " INTPTR_FORMAT, p2i(handle));
3466 JVM_END
3467
3468
3469 JVM_LEAF_PROF(void*, JVM_FindLibraryEntry, JVM_FindLibraryEntry(void* handle, const char* name))
3470 void* find_result = os::dll_lookup(handle, name);
3471 log_info(library)("%s %s in library with handle " INTPTR_FORMAT,
3472 find_result != nullptr ? "Found" : "Failed to find",
3473 name, p2i(handle));
3474 return find_result;
3475 JVM_END
3476
3477
3478 // JNI version ///////////////////////////////////////////////////////////////////////////////
3479
3480 JVM_LEAF_PROF(jboolean, JVM_IsSupportedJNIVersion, JVM_IsSupportedJNIVersion(jint version))
3481 return Threads::is_supported_jni_version_including_1_1(version);
3482 JVM_END
3483
3484
3485 JVM_LEAF_PROF(jboolean, JVM_IsPreviewEnabled, JVM_IsPreviewEnabled(void))
3486 return Arguments::enable_preview() ? JNI_TRUE : JNI_FALSE;
3487 JVM_END
3488
3489 JVM_LEAF_PROF(jboolean, JVM_IsContinuationsSupported, JVM_IsContinuationsSupported(void))
3490 return VMContinuations ? JNI_TRUE : JNI_FALSE;
3491 JVM_END
3492
3493 JVM_LEAF_PROF(jboolean, JVM_IsForeignLinkerSupported, JVM_IsForeignLinkerSupported(void))
3494 return ForeignGlobals::is_foreign_linker_supported() ? JNI_TRUE : JNI_FALSE;
3495 JVM_END
3496
3497 // String support ///////////////////////////////////////////////////////////////////////////
3498
3499 JVM_ENTRY_PROF(jstring, JVM_InternString, JVM_InternString(JNIEnv *env, jstring str))
3500 JvmtiVMObjectAllocEventCollector oam;
3501 if (str == nullptr) return nullptr;
3502 oop string = JNIHandles::resolve_non_null(str);
3503 oop result = StringTable::intern(string, CHECK_NULL);
3504 return (jstring) JNIHandles::make_local(THREAD, result);
3505 JVM_END
3506
3507
3508 // VM Raw monitor support //////////////////////////////////////////////////////////////////////
3509
3510 // VM Raw monitors (not to be confused with JvmtiRawMonitors) are a simple mutual exclusion
3511 // lock (not actually monitors: no wait/notify) that is exported by the VM for use by JDK
3512 // library code. They may be used by JavaThreads and non-JavaThreads and do not participate
3513 // in the safepoint protocol, thread suspension, thread interruption, or anything of that
3514 // nature. JavaThreads will be "in native" when using this API from JDK code.
3515
3516
3517 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3518 VM_Exit::block_if_vm_exited();
3519 return new PlatformMutex();
3545 Handle loader, Handle protection_domain,
3546 jboolean throwError, TRAPS) {
3547 // Security Note:
3548 // The Java level wrapper will perform the necessary security check allowing
3549 // us to pass the null as the initiating class loader. The VM is responsible for
3550 // the checkPackageAccess relative to the initiating class loader via the
3551 // protection_domain. The protection_domain is passed as null by the java code
3552 // if there is no security manager in 3-arg Class.forName().
3553 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
3554
3555 // Check if we should initialize the class
3556 if (init && klass->is_instance_klass()) {
3557 klass->initialize(CHECK_NULL);
3558 }
3559 return (jclass) JNIHandles::make_local(THREAD, klass->java_mirror());
3560 }
3561
3562
3563 // Method ///////////////////////////////////////////////////////////////////////////////////////////
3564
3565 JVM_ENTRY_PROF(jobject, JVM_InvokeMethod, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
3566 Handle method_handle;
3567 if (thread->stack_overflow_state()->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
3568 method_handle = Handle(THREAD, JNIHandles::resolve(method));
3569 Handle receiver(THREAD, JNIHandles::resolve(obj));
3570 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3571 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
3572 jobject res = JNIHandles::make_local(THREAD, result);
3573 if (JvmtiExport::should_post_vm_object_alloc()) {
3574 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
3575 assert(ret_type != nullptr, "sanity check: ret_type oop must not be null!");
3576 if (java_lang_Class::is_primitive(ret_type)) {
3577 // Only for primitive type vm allocates memory for java object.
3578 // See box() method.
3579 JvmtiExport::post_vm_object_alloc(thread, result);
3580 }
3581 }
3582 return res;
3583 } else {
3584 THROW_0(vmSymbols::java_lang_StackOverflowError());
3585 }
3586 JVM_END
3587
3588
3589 JVM_ENTRY_PROF(jobject, JVM_NewInstanceFromConstructor, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
3590 oop constructor_mirror = JNIHandles::resolve(c);
3591 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3592 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
3593 jobject res = JNIHandles::make_local(THREAD, result);
3594 if (JvmtiExport::should_post_vm_object_alloc()) {
3595 JvmtiExport::post_vm_object_alloc(thread, result);
3596 }
3597 return res;
3598 JVM_END
3599
3600 JVM_ENTRY_PROF(void, JVM_InitializeFromArchive, JVM_InitializeFromArchive(JNIEnv* env, jclass cls))
3601 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
3602 assert(k->is_klass(), "just checking");
3603 HeapShared::initialize_from_archived_subgraph(THREAD, k);
3604 JVM_END
3605
3606 JVM_ENTRY_PROF(void, JVM_RegisterLambdaProxyClassForArchiving, JVM_RegisterLambdaProxyClassForArchiving(JNIEnv* env,
3607 jclass caller,
3608 jstring interfaceMethodName,
3609 jobject factoryType,
3610 jobject interfaceMethodType,
3611 jobject implementationMember,
3612 jobject dynamicMethodType,
3613 jclass lambdaProxyClass))
3614 #if INCLUDE_CDS
3615 if (!CDSConfig::is_dumping_archive()) {
3616 return;
3617 }
3618
3619 Klass* caller_k = java_lang_Class::as_Klass(JNIHandles::resolve(caller));
3620 InstanceKlass* caller_ik = InstanceKlass::cast(caller_k);
3621 if (caller_ik->is_hidden()) {
3622 // Hidden classes not of type lambda proxy classes are currently not being archived.
3623 // If the caller_ik is of one of the above types, the corresponding lambda proxy class won't be
3624 // registered for archiving.
3625 return;
3626 }
3634 interface_method_name = java_lang_String::as_symbol(JNIHandles::resolve_non_null(interfaceMethodName));
3635 }
3636 Handle factory_type_oop(THREAD, JNIHandles::resolve_non_null(factoryType));
3637 Symbol* factory_type = java_lang_invoke_MethodType::as_signature(factory_type_oop(), true);
3638
3639 Handle interface_method_type_oop(THREAD, JNIHandles::resolve_non_null(interfaceMethodType));
3640 Symbol* interface_method_type = java_lang_invoke_MethodType::as_signature(interface_method_type_oop(), true);
3641
3642 Handle implementation_member_oop(THREAD, JNIHandles::resolve_non_null(implementationMember));
3643 assert(java_lang_invoke_MemberName::is_method(implementation_member_oop()), "must be");
3644 Method* m = java_lang_invoke_MemberName::vmtarget(implementation_member_oop());
3645
3646 Handle dynamic_method_type_oop(THREAD, JNIHandles::resolve_non_null(dynamicMethodType));
3647 Symbol* dynamic_method_type = java_lang_invoke_MethodType::as_signature(dynamic_method_type_oop(), true);
3648
3649 SystemDictionaryShared::add_lambda_proxy_class(caller_ik, lambda_ik, interface_method_name, factory_type,
3650 interface_method_type, m, dynamic_method_type, THREAD);
3651 #endif // INCLUDE_CDS
3652 JVM_END
3653
3654 JVM_ENTRY_PROF(jclass, JVM_LookupLambdaProxyClassFromArchive, JVM_LookupLambdaProxyClassFromArchive(JNIEnv* env,
3655 jclass caller,
3656 jstring interfaceMethodName,
3657 jobject factoryType,
3658 jobject interfaceMethodType,
3659 jobject implementationMember,
3660 jobject dynamicMethodType))
3661 #if INCLUDE_CDS
3662
3663 if (interfaceMethodName == nullptr || factoryType == nullptr || interfaceMethodType == nullptr ||
3664 implementationMember == nullptr || dynamicMethodType == nullptr) {
3665 THROW_(vmSymbols::java_lang_NullPointerException(), nullptr);
3666 }
3667
3668 Klass* caller_k = java_lang_Class::as_Klass(JNIHandles::resolve(caller));
3669 InstanceKlass* caller_ik = InstanceKlass::cast(caller_k);
3670 if (!caller_ik->is_shared()) {
3671 // there won't be a shared lambda class if the caller_ik is not in the shared archive.
3672 return nullptr;
3673 }
3674
3682 Handle implementation_member_oop(THREAD, JNIHandles::resolve_non_null(implementationMember));
3683 assert(java_lang_invoke_MemberName::is_method(implementation_member_oop()), "must be");
3684 Method* m = java_lang_invoke_MemberName::vmtarget(implementation_member_oop());
3685
3686 Handle dynamic_method_type_oop(THREAD, JNIHandles::resolve_non_null(dynamicMethodType));
3687 Symbol* dynamic_method_type = java_lang_invoke_MethodType::as_signature(dynamic_method_type_oop(), true);
3688
3689 InstanceKlass* lambda_ik = SystemDictionaryShared::get_shared_lambda_proxy_class(caller_ik, interface_method_name, factory_type,
3690 interface_method_type, m, dynamic_method_type);
3691 jclass jcls = nullptr;
3692 if (lambda_ik != nullptr) {
3693 InstanceKlass* loaded_lambda = SystemDictionaryShared::prepare_shared_lambda_proxy_class(lambda_ik, caller_ik, THREAD);
3694 jcls = loaded_lambda == nullptr ? nullptr : (jclass) JNIHandles::make_local(THREAD, loaded_lambda->java_mirror());
3695 }
3696 return jcls;
3697 #else
3698 return nullptr;
3699 #endif // INCLUDE_CDS
3700 JVM_END
3701
3702 JVM_ENTRY_NO_ENV_PROF(jlong, JVM_GetRandomSeedForDumping, JVM_GetRandomSeedForDumping())
3703 if (CDSConfig::is_dumping_static_archive()) {
3704 // We do this so that the default CDS archive can be deterministic.
3705 const char* release = VM_Version::vm_release();
3706 const char* dbg_level = VM_Version::jdk_debug_level();
3707 const char* version = VM_Version::internal_vm_info_string();
3708 jlong seed = (jlong)(java_lang_String::hash_code((const jbyte*)release, (int)strlen(release)) ^
3709 java_lang_String::hash_code((const jbyte*)dbg_level, (int)strlen(dbg_level)) ^
3710 java_lang_String::hash_code((const jbyte*)version, (int)strlen(version)));
3711 seed += (jlong)VM_Version::vm_major_version();
3712 seed += (jlong)VM_Version::vm_minor_version();
3713 seed += (jlong)VM_Version::vm_security_version();
3714 seed += (jlong)VM_Version::vm_patch_version();
3715 if (seed == 0) { // don't let this ever be zero.
3716 seed = 0x87654321;
3717 }
3718 log_debug(cds)("JVM_GetRandomSeedForDumping() = " JLONG_FORMAT, seed);
3719 return seed;
3720 } else {
3721 return 0;
3722 }
3723 JVM_END
3724
3725 JVM_ENTRY_NO_ENV_PROF(jint, JVM_GetCDSConfigStatus, JVM_GetCDSConfigStatus())
3726 return CDSConfig::get_status();
3727 JVM_END
3728
3729 JVM_ENTRY_PROF(void, JVM_LogLambdaFormInvoker, JVM_LogLambdaFormInvoker(JNIEnv *env, jstring line))
3730 #if INCLUDE_CDS
3731 assert(CDSConfig::is_logging_lambda_form_invokers(), "sanity");
3732 if (line != nullptr) {
3733 ResourceMark rm(THREAD);
3734 Handle h_line (THREAD, JNIHandles::resolve_non_null(line));
3735 char* c_line = java_lang_String::as_utf8_string(h_line());
3736 if (CDSConfig::is_dumping_dynamic_archive() || CDSConfig::is_dumping_preimage_static_archive()) {
3737 // Note: LambdaFormInvokers::append take same format which is not
3738 // same as below the print format. The line does not include LAMBDA_FORM_TAG.
3739 LambdaFormInvokers::append(os::strdup((const char*)c_line, mtInternal));
3740 }
3741 if (ClassListWriter::is_enabled()) {
3742 ClassListWriter w;
3743 w.stream()->print_cr("%s %s", ClassListParser::lambda_form_tag(), c_line);
3744 }
3745 }
3746 #endif // INCLUDE_CDS
3747 JVM_END
3748
3749 JVM_ENTRY_PROF(void, JVM_LogDynamicProxy, JVM_LogDynamicProxy(JNIEnv *env, jobject loader, jstring proxy_name, jobjectArray interfaces, jint access_flags))
3750 #if INCLUDE_CDS
3751 assert(CDSConfig::is_tracing_dynamic_proxy(), "sanity");
3752
3753 ResourceMark rm(THREAD);
3754 oop proxy_name_oop = JNIHandles::resolve_non_null(proxy_name);
3755 char* proxy_name_str = java_lang_String::as_utf8_string(proxy_name_oop);
3756 oop loader_oop = JNIHandles::resolve(loader);
3757 objArrayOop interfaces_oop = objArrayOop(JNIHandles::resolve_non_null(interfaces));
3758
3759 ClassPrelinker::trace_dynamic_proxy_class(loader_oop, proxy_name_str, interfaces_oop, access_flags);
3760 #endif // INCLUDE_CDS
3761 JVM_END
3762
3763 JVM_ENTRY_PROF(void, JVM_DumpClassListToFile, JVM_DumpClassListToFile(JNIEnv *env, jstring listFileName))
3764 #if INCLUDE_CDS
3765 ResourceMark rm(THREAD);
3766 Handle file_handle(THREAD, JNIHandles::resolve_non_null(listFileName));
3767 char* file_name = java_lang_String::as_utf8_string(file_handle());
3768 MetaspaceShared::dump_loaded_classes(file_name, THREAD);
3769 #endif // INCLUDE_CDS
3770 JVM_END
3771
3772 JVM_ENTRY_PROF(void, JVM_DumpDynamicArchive, JVM_DumpDynamicArchive(JNIEnv *env, jstring archiveName))
3773 #if INCLUDE_CDS
3774 ResourceMark rm(THREAD);
3775 Handle file_handle(THREAD, JNIHandles::resolve_non_null(archiveName));
3776 char* archive_name = java_lang_String::as_utf8_string(file_handle());
3777 DynamicArchive::dump_for_jcmd(archive_name, CHECK);
3778 #endif // INCLUDE_CDS
3779 JVM_END
3780
3781 // Returns an array of all live Thread objects (VM internal JavaThreads,
3782 // jvmti agent threads, and JNI attaching threads are skipped)
3783 // See CR 6404306 regarding JNI attaching threads
3784 JVM_ENTRY_PROF(jobjectArray, JVM_GetAllThreads, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
3785 ResourceMark rm(THREAD);
3786 ThreadsListEnumerator tle(THREAD, false, false);
3787 JvmtiVMObjectAllocEventCollector oam;
3788
3789 int num_threads = tle.num_threads();
3790 objArrayOop r = oopFactory::new_objArray(vmClasses::Thread_klass(), num_threads, CHECK_NULL);
3791 objArrayHandle threads_ah(THREAD, r);
3792
3793 for (int i = 0; i < num_threads; i++) {
3794 Handle h = tle.get_threadObj(i);
3795 threads_ah->obj_at_put(i, h());
3796 }
3797
3798 return (jobjectArray) JNIHandles::make_local(THREAD, threads_ah());
3799 JVM_END
3800
3801
3802 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
3803 // Return StackTraceElement[][], each element is the stack trace of a thread in
3804 // the corresponding entry in the given threads array
3805 JVM_ENTRY_PROF(jobjectArray, JVM_DumpThreads, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
3806 JvmtiVMObjectAllocEventCollector oam;
3807
3808 // Check if threads is null
3809 if (threads == nullptr) {
3810 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
3811 }
3812
3813 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
3814 objArrayHandle ah(THREAD, a);
3815 int num_threads = ah->length();
3816 // check if threads is non-empty array
3817 if (num_threads == 0) {
3818 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
3819 }
3820
3821 // check if threads is not an array of objects of Thread class
3822 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
3823 if (k != vmClasses::Thread_klass()) {
3824 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
3825 }
3826
3827 ResourceMark rm(THREAD);
3828
3829 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
3830 for (int i = 0; i < num_threads; i++) {
3831 oop thread_obj = ah->obj_at(i);
3832 instanceHandle h(THREAD, (instanceOop) thread_obj);
3833 thread_handle_array->append(h);
3834 }
3835
3836 // The JavaThread references in thread_handle_array are validated
3837 // in VM_ThreadDump::doit().
3838 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
3839 return (jobjectArray)JNIHandles::make_local(THREAD, stacktraces());
3840
3841 JVM_END
3842
3843 // JVM monitoring and management support
3844 JVM_LEAF_PROF(void*, JVM_GetManagement, JVM_GetManagement(jint version))
3845 return Management::get_jmm_interface(version);
3846 JVM_END
3847
3848 // com.sun.tools.attach.VirtualMachine agent properties support
3849 //
3850 // Initialize the agent properties with the properties maintained in the VM
3851 JVM_ENTRY_PROF(jobject, JVM_InitAgentProperties, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
3852 ResourceMark rm;
3853
3854 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
3855
3856 PUTPROP(props, "sun.java.command", Arguments::java_command());
3857 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
3858 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
3859 return properties;
3860 JVM_END
3861
3862 JVM_ENTRY_PROF(jobjectArray, JVM_GetEnclosingMethodInfo, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
3863 {
3864 JvmtiVMObjectAllocEventCollector oam;
3865
3866 if (ofClass == nullptr) {
3867 return nullptr;
3868 }
3869 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
3870 // Special handling for primitive objects
3871 if (java_lang_Class::is_primitive(mirror())) {
3872 return nullptr;
3873 }
3874 Klass* k = java_lang_Class::as_Klass(mirror());
3875 if (!k->is_instance_klass()) {
3876 return nullptr;
3877 }
3878 InstanceKlass* ik = InstanceKlass::cast(k);
3879 int encl_method_class_idx = ik->enclosing_method_class_index();
3880 if (encl_method_class_idx == 0) {
3881 return nullptr;
3882 }
3885 Klass* enc_k = ik->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
3886 dest->obj_at_put(0, enc_k->java_mirror());
3887 int encl_method_method_idx = ik->enclosing_method_method_index();
3888 if (encl_method_method_idx != 0) {
3889 Symbol* sym = ik->constants()->symbol_at(
3890 extract_low_short_from_int(
3891 ik->constants()->name_and_type_at(encl_method_method_idx)));
3892 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3893 dest->obj_at_put(1, str());
3894 sym = ik->constants()->symbol_at(
3895 extract_high_short_from_int(
3896 ik->constants()->name_and_type_at(encl_method_method_idx)));
3897 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3898 dest->obj_at_put(2, str());
3899 }
3900 return (jobjectArray) JNIHandles::make_local(THREAD, dest());
3901 }
3902 JVM_END
3903
3904 // Returns an array of java.lang.String objects containing the input arguments to the VM.
3905 JVM_ENTRY_PROF(jobjectArray, JVM_GetVmArguments, JVM_GetVmArguments(JNIEnv *env))
3906 ResourceMark rm(THREAD);
3907
3908 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) {
3909 return nullptr;
3910 }
3911
3912 char** vm_flags = Arguments::jvm_flags_array();
3913 char** vm_args = Arguments::jvm_args_array();
3914 int num_flags = Arguments::num_jvm_flags();
3915 int num_args = Arguments::num_jvm_args();
3916
3917 InstanceKlass* ik = vmClasses::String_klass();
3918 objArrayOop r = oopFactory::new_objArray(ik, num_args + num_flags, CHECK_NULL);
3919 objArrayHandle result_h(THREAD, r);
3920
3921 int index = 0;
3922 for (int j = 0; j < num_flags; j++, index++) {
3923 Handle h = java_lang_String::create_from_platform_dependent_str(vm_flags[j], CHECK_NULL);
3924 result_h->obj_at_put(index, h());
3925 }
3926 for (int i = 0; i < num_args; i++, index++) {
3927 Handle h = java_lang_String::create_from_platform_dependent_str(vm_args[i], CHECK_NULL);
3928 result_h->obj_at_put(index, h());
3929 }
3930 return (jobjectArray) JNIHandles::make_local(THREAD, result_h());
3931 JVM_END
3932
3933 JVM_LEAF_PROF(jint, JVM_FindSignal, JVM_FindSignal(const char *name))
3934 return os::get_signal_number(name);
3935 JVM_END
3936
3937 JVM_ENTRY_PROF(void, JVM_VirtualThreadStart, JVM_VirtualThreadStart(JNIEnv* env, jobject vthread))
3938 #if INCLUDE_JVMTI
3939 if (!DoJVMTIVirtualThreadTransitions) {
3940 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
3941 return;
3942 }
3943 if (JvmtiVTMSTransitionDisabler::VTMS_notify_jvmti_events()) {
3944 JvmtiVTMSTransitionDisabler::VTMS_vthread_start(vthread);
3945 } else {
3946 // set VTMS transition bit value in JavaThread and java.lang.VirtualThread object
3947 JvmtiVTMSTransitionDisabler::set_is_in_VTMS_transition(thread, vthread, false);
3948 }
3949 #endif
3950 JVM_END
3951
3952 JVM_ENTRY_PROF(void, JVM_VirtualThreadEnd, JVM_VirtualThreadEnd(JNIEnv* env, jobject vthread))
3953 #if INCLUDE_JVMTI
3954 if (!DoJVMTIVirtualThreadTransitions) {
3955 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
3956 return;
3957 }
3958 if (JvmtiVTMSTransitionDisabler::VTMS_notify_jvmti_events()) {
3959 JvmtiVTMSTransitionDisabler::VTMS_vthread_end(vthread);
3960 } else {
3961 // set VTMS transition bit value in JavaThread and java.lang.VirtualThread object
3962 JvmtiVTMSTransitionDisabler::set_is_in_VTMS_transition(thread, vthread, true);
3963 }
3964 #endif
3965 JVM_END
3966
3967 // If notifications are disabled then just update the VTMS transition bit and return.
3968 // Otherwise, the bit is updated in the given jvmtiVTMSTransitionDisabler function call.
3969 JVM_ENTRY_PROF(void, JVM_VirtualThreadMount, JVM_VirtualThreadMount(JNIEnv* env, jobject vthread, jboolean hide))
3970 #if INCLUDE_JVMTI
3971 if (!DoJVMTIVirtualThreadTransitions) {
3972 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
3973 return;
3974 }
3975 if (JvmtiVTMSTransitionDisabler::VTMS_notify_jvmti_events()) {
3976 JvmtiVTMSTransitionDisabler::VTMS_vthread_mount(vthread, hide);
3977 } else {
3978 // set VTMS transition bit value in JavaThread and java.lang.VirtualThread object
3979 JvmtiVTMSTransitionDisabler::set_is_in_VTMS_transition(thread, vthread, hide);
3980 }
3981 #endif
3982 JVM_END
3983
3984 // If notifications are disabled then just update the VTMS transition bit and return.
3985 // Otherwise, the bit is updated in the given jvmtiVTMSTransitionDisabler function call below.
3986 JVM_ENTRY_PROF(void, JVM_VirtualThreadUnmount, JVM_VirtualThreadUnmount(JNIEnv* env, jobject vthread, jboolean hide))
3987 #if INCLUDE_JVMTI
3988 if (!DoJVMTIVirtualThreadTransitions) {
3989 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
3990 return;
3991 }
3992 if (JvmtiVTMSTransitionDisabler::VTMS_notify_jvmti_events()) {
3993 JvmtiVTMSTransitionDisabler::VTMS_vthread_unmount(vthread, hide);
3994 } else {
3995 // set VTMS transition bit value in JavaThread and java.lang.VirtualThread object
3996 JvmtiVTMSTransitionDisabler::set_is_in_VTMS_transition(thread, vthread, hide);
3997 }
3998 #endif
3999 JVM_END
4000
4001 // Always update the temporary VTMS transition bit.
4002 JVM_ENTRY_PROF(void, JVM_VirtualThreadHideFrames, JVM_VirtualThreadHideFrames(JNIEnv* env, jclass clazz, jboolean hide))
4003 #if INCLUDE_JVMTI
4004 if (!DoJVMTIVirtualThreadTransitions) {
4005 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
4006 return;
4007 }
4008 assert(!thread->is_in_VTMS_transition(), "sanity check");
4009 assert(thread->is_in_tmp_VTMS_transition() != (bool)hide, "sanity check");
4010 thread->toggle_is_in_tmp_VTMS_transition();
4011 #endif
4012 JVM_END
4013
4014 // Notification from VirtualThread about disabling JVMTI Suspend in a sync critical section.
4015 // Needed to avoid deadlocks with JVMTI suspend mechanism.
4016 JVM_ENTRY(void, JVM_VirtualThreadDisableSuspend(JNIEnv* env, jclass clazz, jboolean enter))
4017 #if INCLUDE_JVMTI
4018 if (!DoJVMTIVirtualThreadTransitions) {
4019 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
4020 return;
4021 }
4022 assert(thread->is_disable_suspend() != (bool)enter,
4023 "nested or unbalanced monitor enter/exit is not allowed");
4024 thread->toggle_is_disable_suspend();
4025 #endif
4026 JVM_END
4027
4028 /*
4029 * Return the current class's class file version. The low order 16 bits of the
4030 * returned jint contain the class's major version. The high order 16 bits
4031 * contain the class's minor version.
4032 */
4033 JVM_ENTRY_PROF(jint, JVM_GetClassFileVersion, JVM_GetClassFileVersion(JNIEnv* env, jclass current))
4034 oop mirror = JNIHandles::resolve_non_null(current);
4035 if (java_lang_Class::is_primitive(mirror)) {
4036 // return latest major version and minor version of 0.
4037 return JVM_CLASSFILE_MAJOR_VERSION;
4038 }
4039 assert(!java_lang_Class::as_Klass(mirror)->is_array_klass(), "unexpected array class");
4040
4041 Klass* c = java_lang_Class::as_Klass(mirror);
4042 assert(c->is_instance_klass(), "must be");
4043 InstanceKlass* ik = InstanceKlass::cast(c);
4044 return (ik->minor_version() << 16) | ik->major_version();
4045 JVM_END
4046
4047 /*
4048 * Ensure that code doing a stackwalk and using javaVFrame::locals() to
4049 * get the value will see a materialized value and not a scalar-replaced
4050 * null value.
4051 */
4052 JVM_ENTRY_PROF(void, JVM_EnsureMaterializedForStackWalk_func, JVM_EnsureMaterializedForStackWalk_func(JNIEnv* env, jobject vthread, jobject value))
4053 JVM_EnsureMaterializedForStackWalk(env, value);
4054 JVM_END
4055
4056 /*
4057 * Return JNI_TRUE if warnings are printed when agents are dynamically loaded.
4058 */
4059 JVM_LEAF_PROF(jboolean, JVM_PrintWarningAtDynamicAgentLoad, JVM_PrintWarningAtDynamicAgentLoad(void))
4060 return (EnableDynamicAgentLoading && !FLAG_IS_CMDLINE(EnableDynamicAgentLoading)) ? JNI_TRUE : JNI_FALSE;
4061 JVM_END
4062
4063 #define DO_COUNTERS(macro) \
4064 macro(JVM_CurrentTimeMillis) \
4065 macro(JVM_NanoTime) \
4066 macro(JVM_GetNanoTimeAdjustment) \
4067 macro(JVM_ArrayCopy) \
4068 macro(JVM_GetProperties) \
4069 macro(JVM_GetTemporaryDirectory) \
4070 macro(JVM_BeforeHalt) \
4071 macro(JVM_Halt) \
4072 macro(JVM_GC) \
4073 macro(JVM_MaxObjectInspectionAge) \
4074 macro(JVM_TotalMemory) \
4075 macro(JVM_FreeMemory) \
4076 macro(JVM_MaxMemory) \
4077 macro(JVM_ActiveProcessorCount) \
4078 macro(JVM_IsUseContainerSupport) \
4079 macro(JVM_FillInStackTrace) \
4080 macro(JVM_GetExtendedNPEMessage) \
4081 macro(JVM_InitStackTraceElementArray) \
4082 macro(JVM_InitStackTraceElement) \
4083 macro(JVM_ExpandStackFrameInfo) \
4084 macro(JVM_CallStackWalk) \
4085 macro(JVM_MoreStackWalk) \
4086 macro(JVM_SetStackWalkContinuation) \
4087 macro(JVM_IHashCode) \
4088 macro(JVM_MonitorWait) \
4089 macro(JVM_MonitorNotify) \
4090 macro(JVM_MonitorNotifyAll) \
4091 macro(JVM_Clone) \
4092 macro(JVM_ReportFinalizationComplete) \
4093 macro(JVM_IsFinalizationEnabled) \
4094 macro(JVM_RegisterContinuationMethods) \
4095 macro(JVM_NativePath) \
4096 macro(JVM_GetCallerClass) \
4097 macro(JVM_FindPrimitiveClass) \
4098 macro(JVM_FindClassFromBootLoader) \
4099 macro(JVM_FindClassFromCaller) \
4100 macro(JVM_FindClassFromClass) \
4101 macro(JVM_DefineClass) \
4102 macro(JVM_LookupDefineClass) \
4103 macro(JVM_DefineClassWithSource) \
4104 macro(JVM_FindLoadedClass) \
4105 macro(JVM_DefineModule) \
4106 macro(JVM_SetBootLoaderUnnamedModule) \
4107 macro(JVM_AddModuleExports) \
4108 macro(JVM_AddModuleExportsToAllUnnamed) \
4109 macro(JVM_AddModuleExportsToAll) \
4110 macro(JVM_AddReadsModule) \
4111 macro(JVM_DefineArchivedModules) \
4112 macro(JVM_InitClassName) \
4113 macro(JVM_GetClassInterfaces) \
4114 macro(JVM_IsInterface) \
4115 macro(JVM_IsHiddenClass) \
4116 macro(JVM_GetClassSigners) \
4117 macro(JVM_SetClassSigners) \
4118 macro(JVM_GetProtectionDomain) \
4119 macro(JVM_GetInheritedAccessControlContext) \
4120 macro(JVM_GetStackAccessControlContext) \
4121 macro(JVM_FindScopedValueBindings) \
4122 macro(JVM_IsArrayClass) \
4123 macro(JVM_IsPrimitiveClass) \
4124 macro(JVM_GetClassModifiers) \
4125 macro(JVM_GetDeclaredClasses) \
4126 macro(JVM_GetDeclaringClass) \
4127 macro(JVM_GetSimpleBinaryName) \
4128 macro(JVM_GetClassSignature) \
4129 macro(JVM_GetClassAnnotations) \
4130 macro(JVM_GetClassTypeAnnotations) \
4131 macro(JVM_GetMethodTypeAnnotations) \
4132 macro(JVM_GetFieldTypeAnnotations) \
4133 macro(JVM_GetMethodParameters) \
4134 macro(JVM_GetClassDeclaredFields) \
4135 macro(JVM_IsRecord) \
4136 macro(JVM_GetRecordComponents) \
4137 macro(JVM_GetClassDeclaredMethods) \
4138 macro(JVM_GetClassDeclaredConstructors) \
4139 macro(JVM_GetClassAccessFlags) \
4140 macro(JVM_AreNestMates) \
4141 macro(JVM_GetNestHost) \
4142 macro(JVM_GetNestMembers) \
4143 macro(JVM_GetPermittedSubclasses) \
4144 macro(JVM_GetClassConstantPool) \
4145 macro(JVM_ConstantPoolGetSize) \
4146 macro(JVM_ConstantPoolGetClassAt) \
4147 macro(JVM_ConstantPoolGetClassAtIfLoaded) \
4148 macro(JVM_ConstantPoolGetMethodAt) \
4149 macro(JVM_ConstantPoolGetMethodAtIfLoaded) \
4150 macro(JVM_ConstantPoolGetFieldAt) \
4151 macro(JVM_ConstantPoolGetFieldAtIfLoaded) \
4152 macro(JVM_ConstantPoolGetMemberRefInfoAt) \
4153 macro(JVM_ConstantPoolGetClassRefIndexAt) \
4154 macro(JVM_ConstantPoolGetNameAndTypeRefIndexAt) \
4155 macro(JVM_ConstantPoolGetNameAndTypeRefInfoAt) \
4156 macro(JVM_ConstantPoolGetIntAt) \
4157 macro(JVM_ConstantPoolGetLongAt) \
4158 macro(JVM_ConstantPoolGetFloatAt) \
4159 macro(JVM_ConstantPoolGetDoubleAt) \
4160 macro(JVM_ConstantPoolGetStringAt) \
4161 macro(JVM_ConstantPoolGetUTF8At) \
4162 macro(JVM_ConstantPoolGetTagAt) \
4163 macro(JVM_DesiredAssertionStatus) \
4164 macro(JVM_AssertionStatusDirectives) \
4165 macro(JVM_GetClassNameUTF) \
4166 macro(JVM_GetClassCPTypes) \
4167 macro(JVM_GetClassCPEntriesCount) \
4168 macro(JVM_GetClassFieldsCount) \
4169 macro(JVM_GetClassMethodsCount) \
4170 macro(JVM_GetMethodIxExceptionIndexes) \
4171 macro(JVM_GetMethodIxExceptionsCount) \
4172 macro(JVM_GetMethodIxByteCode) \
4173 macro(JVM_GetMethodIxByteCodeLength) \
4174 macro(JVM_GetMethodIxExceptionTableEntry) \
4175 macro(JVM_GetMethodIxExceptionTableLength) \
4176 macro(JVM_GetMethodIxModifiers) \
4177 macro(JVM_GetFieldIxModifiers) \
4178 macro(JVM_GetMethodIxLocalsCount) \
4179 macro(JVM_GetMethodIxArgsSize) \
4180 macro(JVM_GetMethodIxMaxStack) \
4181 macro(JVM_IsConstructorIx) \
4182 macro(JVM_IsVMGeneratedMethodIx) \
4183 macro(JVM_GetMethodIxNameUTF) \
4184 macro(JVM_GetMethodIxSignatureUTF) \
4185 macro(JVM_GetCPFieldNameUTF) \
4186 macro(JVM_GetCPMethodNameUTF) \
4187 macro(JVM_GetCPMethodSignatureUTF) \
4188 macro(JVM_GetCPFieldSignatureUTF) \
4189 macro(JVM_GetCPClassNameUTF) \
4190 macro(JVM_GetCPFieldClassNameUTF) \
4191 macro(JVM_GetCPMethodClassNameUTF) \
4192 macro(JVM_GetCPFieldModifiers) \
4193 macro(JVM_GetCPMethodModifiers) \
4194 macro(JVM_ReleaseUTF) \
4195 macro(JVM_IsSameClassPackage) \
4196 macro(JVM_StartThread) \
4197 macro(JVM_SetThreadPriority) \
4198 macro(JVM_Yield) \
4199 macro(JVM_SleepNanos) \
4200 macro(JVM_CurrentCarrierThread) \
4201 macro(JVM_CurrentThread) \
4202 macro(JVM_SetCurrentThread) \
4203 macro(JVM_GetNextThreadIdOffset) \
4204 macro(JVM_Interrupt) \
4205 macro(JVM_HoldsLock) \
4206 macro(JVM_GetStackTrace) \
4207 macro(JVM_DumpAllStacks) \
4208 macro(JVM_SetNativeThreadName) \
4209 macro(JVM_ScopedValueCache) \
4210 macro(JVM_SetScopedValueCache) \
4211 macro(JVM_GetClassContext) \
4212 macro(JVM_GetSystemPackage) \
4213 macro(JVM_GetSystemPackages) \
4214 macro(JVM_GetAndClearReferencePendingList) \
4215 macro(JVM_HasReferencePendingList) \
4216 macro(JVM_WaitForReferencePendingList) \
4217 macro(JVM_ReferenceRefersTo) \
4218 macro(JVM_ReferenceClear) \
4219 macro(JVM_PhantomReferenceRefersTo) \
4220 macro(JVM_LatestUserDefinedLoader) \
4221 macro(JVM_GetArrayLength) \
4222 macro(JVM_GetArrayElement) \
4223 macro(JVM_GetPrimitiveArrayElement) \
4224 macro(JVM_SetArrayElement) \
4225 macro(JVM_SetPrimitiveArrayElement) \
4226 macro(JVM_NewArray) \
4227 macro(JVM_NewMultiArray) \
4228 macro(JVM_LoadZipLibrary) \
4229 macro(JVM_LoadLibrary) \
4230 macro(JVM_UnloadLibrary) \
4231 macro(JVM_FindLibraryEntry) \
4232 macro(JVM_IsSupportedJNIVersion) \
4233 macro(JVM_IsPreviewEnabled) \
4234 macro(JVM_IsContinuationsSupported) \
4235 macro(JVM_IsForeignLinkerSupported) \
4236 macro(JVM_InternString) \
4237 macro(JVM_InvokeMethod) \
4238 macro(JVM_NewInstanceFromConstructor) \
4239 macro(JVM_InitializeFromArchive) \
4240 macro(JVM_RegisterLambdaProxyClassForArchiving) \
4241 macro(JVM_LookupLambdaProxyClassFromArchive) \
4242 macro(JVM_GetRandomSeedForDumping) \
4243 macro(JVM_LogLambdaFormInvoker) \
4244 macro(JVM_LogDynamicProxy) \
4245 macro(JVM_DumpClassListToFile) \
4246 macro(JVM_DumpDynamicArchive) \
4247 macro(JVM_GetAllThreads) \
4248 macro(JVM_DumpThreads) \
4249 macro(JVM_GetManagement) \
4250 macro(JVM_InitAgentProperties) \
4251 macro(JVM_GetEnclosingMethodInfo) \
4252 macro(JVM_GetVmArguments) \
4253 macro(JVM_FindSignal) \
4254 macro(JVM_VirtualThreadStart) \
4255 macro(JVM_VirtualThreadEnd) \
4256 macro(JVM_VirtualThreadMount) \
4257 macro(JVM_VirtualThreadUnmount) \
4258 macro(JVM_VirtualThreadHideFrames) \
4259 macro(JVM_GetClassFileVersion) \
4260 macro(JVM_EnsureMaterializedForStackWalk_func) \
4261 macro(JVM_PrintWarningAtDynamicAgentLoad)
4262
4263 #define INIT_COUNTER(name) \
4264 NEWPERFTICKCOUNTERS(_perf_##name##_timer, SUN_RT, #name); \
4265 NEWPERFEVENTCOUNTER(_perf_##name##_count, SUN_RT, #name "_count"); \
4266
4267 void perf_jvm_init() {
4268 if (ProfileVMCalls && UsePerfData) {
4269 EXCEPTION_MARK;
4270
4271 DO_COUNTERS(INIT_COUNTER)
4272
4273 if (HAS_PENDING_EXCEPTION) {
4274 vm_exit_during_initialization("jvm_perf_init failed unexpectedly");
4275 }
4276 }
4277 }
4278
4279 #undef INIT_COUNTER
4280
4281 #define PRINT_COUNTER(name) {\
4282 jlong count = _perf_##name##_count->get_value(); \
4283 if (count > 0) { \
4284 st->print_cr(" %-40s = %4ldms (elapsed) %4ldms (thread) (%5ld events)", #name, \
4285 _perf_##name##_timer->elapsed_counter_value_ms(), _perf_##name##_timer->thread_counter_value_ms(), count); \
4286 }}
4287
4288 void perf_jvm_print_on(outputStream* st) {
4289 if (ProfileVMCalls && UsePerfData) {
4290 DO_COUNTERS(PRINT_COUNTER)
4291 } else {
4292 st->print_cr(" JVM: no info (%s is disabled)", (UsePerfData ? "ProfileVMCalls" : "UsePerfData"));
4293 }
4294 }
4295
4296 #undef PRINT_COUNTER
|