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"
223 if (source_file != nullptr) {
224 log_debug(class, resolve)("%s %s %s:%d (%s)", from, to, source_file, line_number, trace);
225 } else {
226 log_debug(class, resolve)("%s %s (%s)", from, to, trace);
227 }
228 }
229 }
230 }
231
232 void trace_class_resolution(Klass* to_class) {
233 EXCEPTION_MARK;
234 trace_class_resolution_impl(to_class, THREAD);
235 if (HAS_PENDING_EXCEPTION) {
236 CLEAR_PENDING_EXCEPTION;
237 }
238 }
239
240 // java.lang.System //////////////////////////////////////////////////////////////////////
241
242
243 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
244 return os::javaTimeMillis();
245 JVM_END
246
247 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored))
248 return os::javaTimeNanos();
249 JVM_END
250
251 // The function below is actually exposed by jdk.internal.misc.VM and not
252 // java.lang.System, but we choose to keep it here so that it stays next
253 // to JVM_CurrentTimeMillis and JVM_NanoTime
254
255 const jlong MAX_DIFF_SECS = CONST64(0x0100000000); // 2^32
256 const jlong MIN_DIFF_SECS = -MAX_DIFF_SECS; // -2^32
257
258 JVM_LEAF(jlong, JVM_GetNanoTimeAdjustment(JNIEnv *env, jclass ignored, jlong offset_secs))
259 jlong seconds;
260 jlong nanos;
261
262 os::javaTimeSystemUTC(seconds, nanos);
263
264 // We're going to verify that the result can fit in a long.
265 // For that we need the difference in seconds between 'seconds'
266 // and 'offset_secs' to be such that:
267 // |seconds - offset_secs| < (2^63/10^9)
268 // We're going to approximate 10^9 ~< 2^30 (1000^3 ~< 1024^3)
269 // which makes |seconds - offset_secs| < 2^33
270 // and we will prefer +/- 2^32 as the maximum acceptable diff
271 // as 2^32 has a more natural feel than 2^33...
272 //
273 // So if |seconds - offset_secs| >= 2^32 - we return a special
274 // sentinel value (-1) which the caller should take as an
275 // exception value indicating that the offset given to us is
276 // too far from range of the current time - leading to too big
277 // a nano adjustment. The caller is expected to recover by
278 // computing a more accurate offset and calling this method
279 // again. (For the record 2^32 secs is ~136 years, so that
280 // should rarely happen)
281 //
282 jlong diff = seconds - offset_secs;
283 if (diff >= MAX_DIFF_SECS || diff <= MIN_DIFF_SECS) {
284 return -1; // sentinel value: the offset is too far off the target
285 }
286
287 // return the adjustment. If you compute a time by adding
288 // this number of nanoseconds along with the number of seconds
289 // in the offset you should get the current UTC time.
290 return (diff * (jlong)1000000000) + nanos;
291 JVM_END
292
293 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
294 jobject dst, jint dst_pos, jint length))
295 // Check if we have null pointers
296 if (src == nullptr || dst == nullptr) {
297 THROW(vmSymbols::java_lang_NullPointerException());
298 }
299 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
300 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
301 assert(oopDesc::is_oop(s), "JVM_ArrayCopy: src not an oop");
302 assert(oopDesc::is_oop(d), "JVM_ArrayCopy: dst not an oop");
303 // Do copy
304 s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread);
305 JVM_END
306
307
308 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
309 JavaValue r(T_OBJECT);
310 // public synchronized Object put(Object key, Object value);
311 HandleMark hm(THREAD);
312 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK);
313 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != nullptr ? value : ""), CHECK);
314 JavaCalls::call_virtual(&r,
315 props,
316 vmClasses::Properties_klass(),
317 vmSymbols::put_name(),
318 vmSymbols::object_object_object_signature(),
319 key_str,
320 value_str,
321 THREAD);
322 }
323
324
325 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
326
327 /*
328 * Return all of the system properties in a Java String array with alternating
329 * names and values from the jvm SystemProperty.
330 * Which includes some internal and all commandline -D defined properties.
331 */
332 JVM_ENTRY(jobjectArray, JVM_GetProperties(JNIEnv *env))
333 ResourceMark rm(THREAD);
334 HandleMark hm(THREAD);
335 int ndx = 0;
336 int fixedCount = 2;
337
338 SystemProperty* p = Arguments::system_properties();
339 int count = Arguments::PropertyList_count(p);
340
341 // Allocate result String array
342 InstanceKlass* ik = vmClasses::String_klass();
343 objArrayOop r = oopFactory::new_objArray(ik, (count + fixedCount) * 2, CHECK_NULL);
344 objArrayHandle result_h(THREAD, r);
345
346 while (p != nullptr) {
347 const char * key = p->key();
348 if (strcmp(key, "sun.nio.MaxDirectMemorySize") != 0) {
349 const char * value = p->value();
350 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK_NULL);
351 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != nullptr ? value : ""), CHECK_NULL);
352 result_h->obj_at_put(ndx * 2, key_str());
400 Handle key_str = java_lang_String::create_from_platform_dependent_str("sun.management.compiler", CHECK_NULL);
401 Handle value_str = java_lang_String::create_from_platform_dependent_str(compiler_name, CHECK_NULL);
402 result_h->obj_at_put(ndx * 2, key_str());
403 result_h->obj_at_put(ndx * 2 + 1, value_str());
404 ndx++;
405 }
406 }
407
408 return (jobjectArray) JNIHandles::make_local(THREAD, result_h());
409 JVM_END
410
411
412 /*
413 * Return the temporary directory that the VM uses for the attach
414 * and perf data files.
415 *
416 * It is important that this directory is well-known and the
417 * same for all VM instances. It cannot be affected by configuration
418 * variables such as java.io.tmpdir.
419 */
420 JVM_ENTRY(jstring, JVM_GetTemporaryDirectory(JNIEnv *env))
421 HandleMark hm(THREAD);
422 const char* temp_dir = os::get_temp_directory();
423 Handle h = java_lang_String::create_from_platform_dependent_str(temp_dir, CHECK_NULL);
424 return (jstring) JNIHandles::make_local(THREAD, h());
425 JVM_END
426
427
428 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
429
430 extern volatile jint vm_created;
431
432 JVM_ENTRY_NO_ENV(void, JVM_BeforeHalt())
433 EventShutdown event;
434 if (event.should_commit()) {
435 event.set_reason("Shutdown requested from Java");
436 event.commit();
437 }
438 JVM_END
439
440
441 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code))
442 before_exit(thread, true);
443 vm_exit(code);
444 JVM_END
445
446
447 JVM_ENTRY_NO_ENV(void, JVM_GC(void))
448 if (!DisableExplicitGC) {
449 EventSystemGC event;
450 event.set_invokedConcurrent(ExplicitGCInvokesConcurrent);
451 Universe::heap()->collect(GCCause::_java_lang_system_gc);
452 event.commit();
453 }
454 JVM_END
455
456
457 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void))
458 return Universe::heap()->millis_since_last_whole_heap_examined();
459 JVM_END
460
461
462 static inline jlong convert_size_t_to_jlong(size_t val) {
463 // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
464 NOT_LP64 (return (jlong)val;)
465 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
466 }
467
468 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void))
469 size_t n = Universe::heap()->capacity();
470 return convert_size_t_to_jlong(n);
471 JVM_END
472
473
474 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void))
475 size_t n = Universe::heap()->unused();
476 return convert_size_t_to_jlong(n);
477 JVM_END
478
479
480 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void))
481 size_t n = Universe::heap()->max_capacity();
482 return convert_size_t_to_jlong(n);
483 JVM_END
484
485
486 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void))
487 return os::active_processor_count();
488 JVM_END
489
490 JVM_LEAF(jboolean, JVM_IsUseContainerSupport(void))
491 #ifdef LINUX
492 if (UseContainerSupport) {
493 return JNI_TRUE;
494 }
495 #endif
496 return JNI_FALSE;
497 JVM_END
498
499 // java.lang.Throwable //////////////////////////////////////////////////////
500
501 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
502 Handle exception(thread, JNIHandles::resolve_non_null(receiver));
503 java_lang_Throwable::fill_in_stack_trace(exception);
504 JVM_END
505
506 // java.lang.NullPointerException ///////////////////////////////////////////
507
508 JVM_ENTRY(jstring, JVM_GetExtendedNPEMessage(JNIEnv *env, jthrowable throwable))
509 if (!ShowCodeDetailsInExceptionMessages) return nullptr;
510
511 oop exc = JNIHandles::resolve_non_null(throwable);
512
513 Method* method;
514 int bci;
515 if (!java_lang_Throwable::get_top_method_and_bci(exc, &method, &bci)) {
516 return nullptr;
517 }
518 if (method->is_native()) {
519 return nullptr;
520 }
521
522 stringStream ss;
523 bool ok = BytecodeUtils::get_NPE_message_at(&ss, method, bci);
524 if (ok) {
525 oop result = java_lang_String::create_oop_from_str(ss.base(), CHECK_NULL);
526 return (jstring) JNIHandles::make_local(THREAD, result);
527 } else {
528 return nullptr;
529 }
530 JVM_END
531
532 // java.lang.StackTraceElement //////////////////////////////////////////////
533
534
535 JVM_ENTRY(void, JVM_InitStackTraceElementArray(JNIEnv *env, jobjectArray elements, jobject backtrace, jint depth))
536 Handle backtraceh(THREAD, JNIHandles::resolve(backtrace));
537 objArrayOop st = objArrayOop(JNIHandles::resolve(elements));
538 objArrayHandle stack_trace(THREAD, st);
539 // Fill in the allocated stack trace
540 java_lang_Throwable::get_stack_trace_elements(depth, backtraceh, stack_trace, CHECK);
541 JVM_END
542
543
544 JVM_ENTRY(void, JVM_InitStackTraceElement(JNIEnv* env, jobject element, jobject stackFrameInfo))
545 Handle stack_frame_info(THREAD, JNIHandles::resolve_non_null(stackFrameInfo));
546 Handle stack_trace_element(THREAD, JNIHandles::resolve_non_null(element));
547 java_lang_StackFrameInfo::to_stack_trace_element(stack_frame_info, stack_trace_element, CHECK);
548 JVM_END
549
550
551 // java.lang.StackWalker //////////////////////////////////////////////////////
552 JVM_ENTRY(void, JVM_ExpandStackFrameInfo(JNIEnv *env, jobject obj))
553 Handle stack_frame_info(THREAD, JNIHandles::resolve_non_null(obj));
554
555 bool have_name = (java_lang_StackFrameInfo::name(stack_frame_info()) != nullptr);
556 bool have_type = (java_lang_StackFrameInfo::type(stack_frame_info()) != nullptr);
557 Method* method = java_lang_StackFrameInfo::get_method(stack_frame_info());
558 if (!have_name) {
559 oop name = StringTable::intern(method->name(), CHECK);
560 java_lang_StackFrameInfo::set_name(stack_frame_info(), name);
561 }
562 if (!have_type) {
563 Handle type = java_lang_String::create_from_symbol(method->signature(), CHECK);
564 java_lang_StackFrameInfo::set_type(stack_frame_info(), type());
565 }
566 JVM_END
567
568 JVM_ENTRY(jobject, JVM_CallStackWalk(JNIEnv *env, jobject stackStream, jint mode,
569 jint skip_frames, jobject contScope, jobject cont,
570 jint buffer_size, jint start_index, jobjectArray frames))
571 if (!thread->has_last_Java_frame()) {
572 THROW_MSG_(vmSymbols::java_lang_InternalError(), "doStackWalk: no stack trace", nullptr);
573 }
574
575 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
576 Handle contScope_h(THREAD, JNIHandles::resolve(contScope));
577 Handle cont_h(THREAD, JNIHandles::resolve(cont));
578 // frames array is a ClassFrameInfo[] array when only getting caller reference,
579 // and a StackFrameInfo[] array (or derivative) otherwise. It should never
580 // be null.
581 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
582 objArrayHandle frames_array_h(THREAD, fa);
583
584 if (frames_array_h->length() < buffer_size) {
585 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers", nullptr);
586 }
587
588 oop result = StackWalk::walk(stackStream_h, mode, skip_frames, contScope_h, cont_h,
589 buffer_size, start_index, frames_array_h, CHECK_NULL);
590 return JNIHandles::make_local(THREAD, result);
591 JVM_END
592
593
594 JVM_ENTRY(jint, JVM_MoreStackWalk(JNIEnv *env, jobject stackStream, jint mode, jlong anchor,
595 jint last_batch_count, jint buffer_size, jint start_index,
596 jobjectArray frames))
597 // frames array is a ClassFrameInfo[] array when only getting caller reference,
598 // and a StackFrameInfo[] array (or derivative) otherwise. It should never
599 // be null.
600 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
601 objArrayHandle frames_array_h(THREAD, fa);
602
603 if (frames_array_h->length() < buffer_size) {
604 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers");
605 }
606
607 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
608 return StackWalk::fetchNextBatch(stackStream_h, mode, anchor, last_batch_count, buffer_size,
609 start_index, frames_array_h, THREAD);
610 JVM_END
611
612 JVM_ENTRY(void, JVM_SetStackWalkContinuation(JNIEnv *env, jobject stackStream, jlong anchor, jobjectArray frames, jobject cont))
613 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
614 objArrayHandle frames_array_h(THREAD, fa);
615 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
616 Handle cont_h(THREAD, JNIHandles::resolve_non_null(cont));
617
618 StackWalk::setContinuation(stackStream_h, anchor, frames_array_h, cont_h, THREAD);
619 JVM_END
620
621 // java.lang.Object ///////////////////////////////////////////////
622
623
624 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle))
625 // as implemented in the classic virtual machine; return 0 if object is null
626 return handle == nullptr ? 0 :
627 checked_cast<jint>(ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)));
628 JVM_END
629
630
631 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
632 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
633 JavaThreadInObjectWaitState jtiows(thread, ms != 0);
634 if (JvmtiExport::should_post_monitor_wait()) {
635 JvmtiExport::post_monitor_wait(thread, obj(), ms);
636
637 // The current thread already owns the monitor and it has not yet
638 // been added to the wait queue so the current thread cannot be
639 // made the successor. This means that the JVMTI_EVENT_MONITOR_WAIT
640 // event handler cannot accidentally consume an unpark() meant for
641 // the ParkEvent associated with this ObjectMonitor.
642 }
643 ObjectSynchronizer::wait(obj, ms, CHECK);
644 JVM_END
645
646
647 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
648 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
649 ObjectSynchronizer::notify(obj, CHECK);
650 JVM_END
651
652
653 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
654 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
655 ObjectSynchronizer::notifyall(obj, CHECK);
656 JVM_END
657
658
659 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle))
660 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
661 Klass* klass = obj->klass();
662 JvmtiVMObjectAllocEventCollector oam;
663
664 #ifdef ASSERT
665 // Just checking that the cloneable flag is set correct
666 if (obj->is_array()) {
667 guarantee(klass->is_cloneable(), "all arrays are cloneable");
668 } else {
669 guarantee(obj->is_instance(), "should be instanceOop");
670 bool cloneable = klass->is_subtype_of(vmClasses::Cloneable_klass());
671 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
672 }
673 #endif
674
675 // Check if class of obj supports the Cloneable interface.
676 // All arrays are considered to be cloneable (See JLS 20.1.5).
677 // All j.l.r.Reference classes are considered non-cloneable.
678 if (!klass->is_cloneable() ||
679 (klass->is_instance_klass() &&
692 } else {
693 new_obj_oop = Universe::heap()->obj_allocate(klass, size, CHECK_NULL);
694 }
695
696 HeapAccess<>::clone(obj(), new_obj_oop, size);
697
698 Handle new_obj(THREAD, new_obj_oop);
699 // Caution: this involves a java upcall, so the clone should be
700 // "gc-robust" by this stage.
701 if (klass->has_finalizer()) {
702 assert(obj->is_instance(), "should be instanceOop");
703 new_obj_oop = InstanceKlass::register_finalizer(instanceOop(new_obj()), CHECK_NULL);
704 new_obj = Handle(THREAD, new_obj_oop);
705 }
706
707 return JNIHandles::make_local(THREAD, new_obj());
708 JVM_END
709
710 // java.lang.ref.Finalizer ////////////////////////////////////////////////////
711
712 JVM_ENTRY(void, JVM_ReportFinalizationComplete(JNIEnv * env, jobject finalizee))
713 MANAGEMENT_ONLY(FinalizerService::on_complete(JNIHandles::resolve_non_null(finalizee), THREAD);)
714 JVM_END
715
716 JVM_LEAF(jboolean, JVM_IsFinalizationEnabled(JNIEnv * env))
717 return InstanceKlass::is_finalization_enabled();
718 JVM_END
719
720 // jdk.internal.vm.Continuation /////////////////////////////////////////////////////
721
722 JVM_ENTRY(void, JVM_RegisterContinuationMethods(JNIEnv *env, jclass cls))
723 CONT_RegisterNativeMethods(env, cls);
724 JVM_END
725
726 // java.io.File ///////////////////////////////////////////////////////////////
727
728 JVM_LEAF(char*, JVM_NativePath(char* path))
729 return os::native_path(path);
730 JVM_END
731
732
733 // Misc. class handling ///////////////////////////////////////////////////////////
734
735
736 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env))
737 // Getting the class of the caller frame.
738 //
739 // The call stack at this point looks something like this:
740 //
741 // [0] [ @CallerSensitive public jdk.internal.reflect.Reflection.getCallerClass ]
742 // [1] [ @CallerSensitive API.method ]
743 // [.] [ (skipped intermediate frames) ]
744 // [n] [ caller ]
745 vframeStream vfst(thread);
746 // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass
747 for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) {
748 Method* m = vfst.method();
749 assert(m != nullptr, "sanity");
750 switch (n) {
751 case 0:
752 // This must only be called from Reflection.getCallerClass
753 if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) {
754 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass");
755 }
756 // fall-through
757 case 1:
758 // Frame 0 and 1 must be caller sensitive.
759 if (!m->caller_sensitive()) {
760 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n));
761 }
762 break;
763 default:
764 if (!m->is_ignored_by_security_stack_walk()) {
765 // We have reached the desired frame; return the holder class.
766 return (jclass) JNIHandles::make_local(THREAD, m->method_holder()->java_mirror());
767 }
768 break;
769 }
770 }
771 return nullptr;
772 JVM_END
773
774
775 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
776 oop mirror = nullptr;
777 BasicType t = name2type(utf);
778 if (t != T_ILLEGAL && !is_reference_type(t)) {
779 mirror = Universe::java_mirror(t);
780 }
781 if (mirror == nullptr) {
782 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
783 } else {
784 return (jclass) JNIHandles::make_local(THREAD, mirror);
785 }
786 JVM_END
787
788
789 // Returns a class loaded by the bootstrap class loader; or null
790 // if not found. ClassNotFoundException is not thrown.
791 // FindClassFromBootLoader is exported to the launcher for windows.
792 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
793 const char* name))
794 // Java libraries should ensure that name is never null or illegal.
795 if (name == nullptr || (int)strlen(name) > Symbol::max_length()) {
796 // It's impossible to create this class; the name cannot fit
797 // into the constant pool.
798 return nullptr;
799 }
800 assert(UTF8::is_legal_utf8((const unsigned char*)name, (int)strlen(name), false), "illegal UTF name");
801
802 TempNewSymbol h_name = SymbolTable::new_symbol(name);
803 Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
804 if (k == nullptr) {
805 return nullptr;
806 }
807
808 if (log_is_enabled(Debug, class, resolve)) {
809 trace_class_resolution(k);
810 }
811 return (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
812 JVM_END
813
814 // Find a class with this name in this loader, using the caller's protection domain.
815 JVM_ENTRY(jclass, JVM_FindClassFromCaller(JNIEnv* env, const char* name,
816 jboolean init, jobject loader,
817 jclass caller))
818 TempNewSymbol h_name =
819 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_ClassNotFoundException(),
820 CHECK_NULL);
821
822 oop loader_oop = JNIHandles::resolve(loader);
823 oop from_class = JNIHandles::resolve(caller);
824 oop protection_domain = nullptr;
825 // If loader is null, shouldn't call ClassLoader.checkPackageAccess; otherwise get
826 // NPE. Put it in another way, the bootstrap class loader has all permission and
827 // thus no checkPackageAccess equivalence in the VM class loader.
828 // The caller is also passed as null by the java code if there is no security
829 // manager to avoid the performance cost of getting the calling class.
830 if (from_class != nullptr && loader_oop != nullptr) {
831 protection_domain = java_lang_Class::as_Klass(from_class)->protection_domain();
832 }
833
834 Handle h_loader(THREAD, loader_oop);
835 Handle h_prot(THREAD, protection_domain);
836 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
837 h_prot, false, THREAD);
838
839 if (log_is_enabled(Debug, class, resolve) && result != nullptr) {
840 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
841 }
842 return result;
843 JVM_END
844
845 // Currently only called from the old verifier.
846 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
847 jboolean init, jclass from))
848 TempNewSymbol h_name =
849 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_ClassNotFoundException(),
850 CHECK_NULL);
851 oop from_class_oop = JNIHandles::resolve(from);
852 Klass* from_class = (from_class_oop == nullptr)
853 ? (Klass*)nullptr
854 : java_lang_Class::as_Klass(from_class_oop);
855 oop class_loader = nullptr;
856 oop protection_domain = nullptr;
857 if (from_class != nullptr) {
858 class_loader = from_class->class_loader();
859 protection_domain = from_class->protection_domain();
860 }
861 Handle h_loader(THREAD, class_loader);
862 Handle h_prot (THREAD, protection_domain);
863 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
864 h_prot, true, thread);
865
866 if (log_is_enabled(Debug, class, resolve) && result != nullptr) {
867 // this function is generally only used for class loading during verification.
1030 ik->external_name(),
1031 host_class->external_name(),
1032 ik->is_hidden() ? "is hidden" : "is not hidden");
1033 }
1034 }
1035
1036 if ((!is_hidden || is_nestmate) && !Reflection::is_same_class_package(lookup_k, ik)) {
1037 // non-hidden class or nestmate class must be in the same package as the Lookup class
1038 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Lookup class and defined class are in different packages");
1039 }
1040
1041 if (init) {
1042 ik->initialize(CHECK_NULL);
1043 } else {
1044 ik->link_class(CHECK_NULL);
1045 }
1046
1047 return (jclass) JNIHandles::make_local(THREAD, ik->java_mirror());
1048 }
1049
1050 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
1051 return jvm_define_class_common(name, loader, buf, len, pd, nullptr, THREAD);
1052 JVM_END
1053
1054 /*
1055 * Define a class with the specified lookup class.
1056 * lookup: Lookup class
1057 * name: the name of the class
1058 * buf: class bytes
1059 * len: length of class bytes
1060 * pd: protection domain
1061 * init: initialize the class
1062 * flags: properties of the class
1063 * classData: private static pre-initialized field
1064 */
1065 JVM_ENTRY(jclass, JVM_LookupDefineClass(JNIEnv *env, jclass lookup, const char *name, const jbyte *buf,
1066 jsize len, jobject pd, jboolean initialize, int flags, jobject classData))
1067
1068 if (lookup == nullptr) {
1069 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Lookup class is null");
1070 }
1071
1072 assert(buf != nullptr, "buf must not be null");
1073
1074 return jvm_lookup_define_class(lookup, name, buf, len, pd, initialize, flags, classData, THREAD);
1075 JVM_END
1076
1077 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
1078
1079 return jvm_define_class_common(name, loader, buf, len, pd, source, THREAD);
1080 JVM_END
1081
1082 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
1083 ResourceMark rm(THREAD);
1084
1085 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
1086 char* str = java_lang_String::as_utf8_string(h_name());
1087
1088 // Sanity check, don't expect null
1089 if (str == nullptr) return nullptr;
1090
1091 // Internalize the string, converting '.' to '/' in string.
1092 char* p = (char*)str;
1093 while (*p != '\0') {
1094 if (*p == '.') {
1095 *p = '/';
1096 }
1097 p++;
1098 }
1099
1100 const int str_len = (int)(p - str);
1101 if (str_len > Symbol::max_length()) {
1102 // It's impossible to create this class; the name cannot fit
1108 // Security Note:
1109 // The Java level wrapper will perform the necessary security check allowing
1110 // us to pass the null as the initiating class loader.
1111 Handle h_loader(THREAD, JNIHandles::resolve(loader));
1112 Klass* k = SystemDictionary::find_instance_or_array_klass(THREAD, klass_name,
1113 h_loader,
1114 Handle());
1115 #if INCLUDE_CDS
1116 if (k == nullptr) {
1117 // If the class is not already loaded, try to see if it's in the shared
1118 // archive for the current classloader (h_loader).
1119 k = SystemDictionaryShared::find_or_load_shared_class(klass_name, h_loader, CHECK_NULL);
1120 }
1121 #endif
1122 return (k == nullptr) ? nullptr :
1123 (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
1124 JVM_END
1125
1126 // Module support //////////////////////////////////////////////////////////////////////////////
1127
1128 JVM_ENTRY(void, JVM_DefineModule(JNIEnv *env, jobject module, jboolean is_open, jstring version,
1129 jstring location, jobjectArray packages))
1130 Handle h_module (THREAD, JNIHandles::resolve(module));
1131 Modules::define_module(h_module, is_open, version, location, packages, CHECK);
1132 JVM_END
1133
1134 JVM_ENTRY(void, JVM_SetBootLoaderUnnamedModule(JNIEnv *env, jobject module))
1135 Handle h_module (THREAD, JNIHandles::resolve(module));
1136 Modules::set_bootloader_unnamed_module(h_module, CHECK);
1137 JVM_END
1138
1139 JVM_ENTRY(void, JVM_AddModuleExports(JNIEnv *env, jobject from_module, jstring package, jobject to_module))
1140 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1141 Handle h_to_module (THREAD, JNIHandles::resolve(to_module));
1142 Modules::add_module_exports_qualified(h_from_module, package, h_to_module, CHECK);
1143 JVM_END
1144
1145 JVM_ENTRY(void, JVM_AddModuleExportsToAllUnnamed(JNIEnv *env, jobject from_module, jstring package))
1146 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1147 Modules::add_module_exports_to_all_unnamed(h_from_module, package, CHECK);
1148 JVM_END
1149
1150 JVM_ENTRY(void, JVM_AddModuleExportsToAll(JNIEnv *env, jobject from_module, jstring package))
1151 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1152 Modules::add_module_exports(h_from_module, package, Handle(), CHECK);
1153 JVM_END
1154
1155 JVM_ENTRY (void, JVM_AddReadsModule(JNIEnv *env, jobject from_module, jobject source_module))
1156 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1157 Handle h_source_module (THREAD, JNIHandles::resolve(source_module));
1158 Modules::add_reads_module(h_from_module, h_source_module, CHECK);
1159 JVM_END
1160
1161 JVM_ENTRY(void, JVM_DefineArchivedModules(JNIEnv *env, jobject platform_loader, jobject system_loader))
1162 Handle h_platform_loader (THREAD, JNIHandles::resolve(platform_loader));
1163 Handle h_system_loader (THREAD, JNIHandles::resolve(system_loader));
1164 Modules::define_archived_modules(h_platform_loader, h_system_loader, CHECK);
1165 JVM_END
1166
1167 // Reflection support //////////////////////////////////////////////////////////////////////////////
1168
1169 JVM_ENTRY(jstring, JVM_InitClassName(JNIEnv *env, jclass cls))
1170 assert (cls != nullptr, "illegal class");
1171 JvmtiVMObjectAllocEventCollector oam;
1172 ResourceMark rm(THREAD);
1173 HandleMark hm(THREAD);
1174 Handle java_class(THREAD, JNIHandles::resolve(cls));
1175 oop result = java_lang_Class::name(java_class, CHECK_NULL);
1176 return (jstring) JNIHandles::make_local(THREAD, result);
1177 JVM_END
1178
1179
1180 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
1181 JvmtiVMObjectAllocEventCollector oam;
1182 oop mirror = JNIHandles::resolve_non_null(cls);
1183
1184 // Special handling for primitive objects
1185 if (java_lang_Class::is_primitive(mirror)) {
1186 // Primitive objects does not have any interfaces
1187 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(), 0, CHECK_NULL);
1188 return (jobjectArray) JNIHandles::make_local(THREAD, r);
1189 }
1190
1191 Klass* klass = java_lang_Class::as_Klass(mirror);
1192 // Figure size of result array
1193 int size;
1194 if (klass->is_instance_klass()) {
1195 size = InstanceKlass::cast(klass)->local_interfaces()->length();
1196 } else {
1197 assert(klass->is_objArray_klass() || klass->is_typeArray_klass(), "Illegal mirror klass");
1198 size = 2;
1199 }
1200
1201 // Allocate result array
1202 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(), size, CHECK_NULL);
1203 objArrayHandle result (THREAD, r);
1204 // Fill in result
1205 if (klass->is_instance_klass()) {
1206 // Regular instance klass, fill in all local interfaces
1207 for (int index = 0; index < size; index++) {
1208 Klass* k = InstanceKlass::cast(klass)->local_interfaces()->at(index);
1209 result->obj_at_put(index, k->java_mirror());
1210 }
1211 } else {
1212 // All arrays implement java.lang.Cloneable and java.io.Serializable
1213 result->obj_at_put(0, vmClasses::Cloneable_klass()->java_mirror());
1214 result->obj_at_put(1, vmClasses::Serializable_klass()->java_mirror());
1215 }
1216 return (jobjectArray) JNIHandles::make_local(THREAD, result());
1217 JVM_END
1218
1219
1220 JVM_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
1221 oop mirror = JNIHandles::resolve_non_null(cls);
1222 if (java_lang_Class::is_primitive(mirror)) {
1223 return JNI_FALSE;
1224 }
1225 Klass* k = java_lang_Class::as_Klass(mirror);
1226 jboolean result = k->is_interface();
1227 assert(!result || k->is_instance_klass(),
1228 "all interfaces are instance types");
1229 // The compiler intrinsic for isInterface tests the
1230 // Klass::_access_flags bits in the same way.
1231 return result;
1232 JVM_END
1233
1234 JVM_ENTRY(jboolean, JVM_IsHiddenClass(JNIEnv *env, jclass cls))
1235 oop mirror = JNIHandles::resolve_non_null(cls);
1236 if (java_lang_Class::is_primitive(mirror)) {
1237 return JNI_FALSE;
1238 }
1239 Klass* k = java_lang_Class::as_Klass(mirror);
1240 return k->is_hidden();
1241 JVM_END
1242
1243 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
1244 JvmtiVMObjectAllocEventCollector oam;
1245 oop mirror = JNIHandles::resolve_non_null(cls);
1246 if (java_lang_Class::is_primitive(mirror)) {
1247 // There are no signers for primitive types
1248 return nullptr;
1249 }
1250
1251 objArrayHandle signers(THREAD, java_lang_Class::signers(mirror));
1252
1253 // If there are no signers set in the class, or if the class
1254 // is an array, return null.
1255 if (signers == nullptr) return nullptr;
1256
1257 // copy of the signers array
1258 Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass();
1259 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1260 for (int index = 0; index < signers->length(); index++) {
1261 signers_copy->obj_at_put(index, signers->obj_at(index));
1262 }
1263
1264 // return the copy
1265 return (jobjectArray) JNIHandles::make_local(THREAD, signers_copy);
1266 JVM_END
1267
1268
1269 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1270 oop mirror = JNIHandles::resolve_non_null(cls);
1271 if (!java_lang_Class::is_primitive(mirror)) {
1272 // This call is ignored for primitive types and arrays.
1273 // Signers are only set once, ClassLoader.java, and thus shouldn't
1274 // be called with an array. Only the bootstrap loader creates arrays.
1275 Klass* k = java_lang_Class::as_Klass(mirror);
1276 if (k->is_instance_klass()) {
1277 java_lang_Class::set_signers(k->java_mirror(), objArrayOop(JNIHandles::resolve(signers)));
1278 }
1279 }
1280 JVM_END
1281
1282
1283 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1284 oop mirror = JNIHandles::resolve_non_null(cls);
1285 if (mirror == nullptr) {
1286 THROW_(vmSymbols::java_lang_NullPointerException(), nullptr);
1287 }
1288
1289 if (java_lang_Class::is_primitive(mirror)) {
1290 // Primitive types does not have a protection domain.
1291 return nullptr;
1292 }
1293
1294 oop pd = java_lang_Class::protection_domain(mirror);
1295 return (jobject) JNIHandles::make_local(THREAD, pd);
1296 JVM_END
1297
1298
1299 // Returns the inherited_access_control_context field of the running thread.
1300 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1301 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1302 return JNIHandles::make_local(THREAD, result);
1303 JVM_END
1304
1305 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1306 if (!UsePrivilegedStack) return nullptr;
1307
1308 ResourceMark rm(THREAD);
1309 GrowableArray<Handle>* local_array = new GrowableArray<Handle>(12);
1310 JvmtiVMObjectAllocEventCollector oam;
1311
1312 // count the protection domains on the execution stack. We collapse
1313 // duplicate consecutive protection domains into a single one, as
1314 // well as stopping when we hit a privileged frame.
1315
1316 oop previous_protection_domain = nullptr;
1317 Handle privileged_context(thread, nullptr);
1318 bool is_privileged = false;
1319 oop protection_domain = nullptr;
1320
1321 // Iterate through Java frames
1322 vframeStream vfst(thread);
1323 for(; !vfst.at_end(); vfst.next()) {
1324 // get method of frame
1325 Method* method = vfst.method();
1369 local_array->length(), CHECK_NULL);
1370 objArrayHandle h_context(thread, context);
1371 for (int index = 0; index < local_array->length(); index++) {
1372 h_context->obj_at_put(index, local_array->at(index)());
1373 }
1374
1375 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1376
1377 return JNIHandles::make_local(THREAD, result);
1378 JVM_END
1379
1380 class ScopedValueBindingsResolver {
1381 public:
1382 InstanceKlass* Carrier_klass;
1383 ScopedValueBindingsResolver(JavaThread* THREAD) {
1384 Klass *k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_ScopedValue_Carrier(), true, THREAD);
1385 Carrier_klass = InstanceKlass::cast(k);
1386 }
1387 };
1388
1389 JVM_ENTRY(jobject, JVM_FindScopedValueBindings(JNIEnv *env, jclass cls))
1390 ResourceMark rm(THREAD);
1391 GrowableArray<Handle>* local_array = new GrowableArray<Handle>(12);
1392 JvmtiVMObjectAllocEventCollector oam;
1393
1394 static ScopedValueBindingsResolver resolver(THREAD);
1395
1396 // Iterate through Java frames
1397 vframeStream vfst(thread);
1398 for(; !vfst.at_end(); vfst.next()) {
1399 int loc = -1;
1400 // get method of frame
1401 Method* method = vfst.method();
1402
1403 Symbol *name = method->name();
1404
1405 InstanceKlass* holder = method->method_holder();
1406 if (name == vmSymbols::runWith_method_name()) {
1407 if (holder == vmClasses::Thread_klass()
1408 || holder == resolver.Carrier_klass) {
1409 loc = 1;
1410 }
1411 }
1412
1413 if (loc != -1) {
1414 javaVFrame *frame = vfst.asJavaVFrame();
1415 StackValueCollection* locals = frame->locals();
1416 StackValue* head_sv = locals->at(loc); // java/lang/ScopedValue$Snapshot
1417 Handle result = head_sv->get_obj();
1418 assert(!head_sv->obj_is_scalar_replaced(), "found scalar-replaced object");
1419 if (result() != nullptr) {
1420 return JNIHandles::make_local(THREAD, result());
1421 }
1422 }
1423 }
1424
1425 return nullptr;
1426 JVM_END
1427
1428 JVM_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1429 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1430 return (k != nullptr) && k->is_array_klass() ? true : false;
1431 JVM_END
1432
1433
1434 JVM_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1435 oop mirror = JNIHandles::resolve_non_null(cls);
1436 return (jboolean) java_lang_Class::is_primitive(mirror);
1437 JVM_END
1438
1439
1440 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1441 oop mirror = JNIHandles::resolve_non_null(cls);
1442 if (java_lang_Class::is_primitive(mirror)) {
1443 // Primitive type
1444 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1445 }
1446
1447 Klass* k = java_lang_Class::as_Klass(mirror);
1448 debug_only(int computed_modifiers = k->compute_modifier_flags());
1449 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1450 return k->modifier_flags();
1451 JVM_END
1452
1453
1454 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1455
1456 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1457 JvmtiVMObjectAllocEventCollector oam;
1458 // ofClass is a reference to a java_lang_Class object. The mirror object
1459 // of an InstanceKlass
1460 oop ofMirror = JNIHandles::resolve_non_null(ofClass);
1461 if (java_lang_Class::is_primitive(ofMirror) ||
1462 ! java_lang_Class::as_Klass(ofMirror)->is_instance_klass()) {
1463 oop result = oopFactory::new_objArray(vmClasses::Class_klass(), 0, CHECK_NULL);
1464 return (jobjectArray)JNIHandles::make_local(THREAD, result);
1465 }
1466
1467 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(ofMirror));
1468 InnerClassesIterator iter(k);
1469
1470 if (iter.length() == 0) {
1471 // Neither an inner nor outer class
1472 oop result = oopFactory::new_objArray(vmClasses::Class_klass(), 0, CHECK_NULL);
1473 return (jobjectArray)JNIHandles::make_local(THREAD, result);
1474 }
1475
1476 // find inner class info
1502 result->obj_at_put(members, inner_klass->java_mirror());
1503 members++;
1504 }
1505 }
1506 }
1507 }
1508
1509 if (members != length) {
1510 // Return array of right length
1511 objArrayOop res = oopFactory::new_objArray(vmClasses::Class_klass(), members, CHECK_NULL);
1512 for(int i = 0; i < members; i++) {
1513 res->obj_at_put(i, result->obj_at(i));
1514 }
1515 return (jobjectArray)JNIHandles::make_local(THREAD, res);
1516 }
1517
1518 return (jobjectArray)JNIHandles::make_local(THREAD, result());
1519 JVM_END
1520
1521
1522 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1523 {
1524 // ofClass is a reference to a java_lang_Class object.
1525 oop ofMirror = JNIHandles::resolve_non_null(ofClass);
1526 if (java_lang_Class::is_primitive(ofMirror)) {
1527 return nullptr;
1528 }
1529 Klass* klass = java_lang_Class::as_Klass(ofMirror);
1530 if (!klass->is_instance_klass()) {
1531 return nullptr;
1532 }
1533
1534 bool inner_is_member = false;
1535 Klass* outer_klass
1536 = InstanceKlass::cast(klass)->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1537 if (outer_klass == nullptr) return nullptr; // already a top-level class
1538 if (!inner_is_member) return nullptr; // a hidden class (inside a method)
1539 return (jclass) JNIHandles::make_local(THREAD, outer_klass->java_mirror());
1540 }
1541 JVM_END
1542
1543 JVM_ENTRY(jstring, JVM_GetSimpleBinaryName(JNIEnv *env, jclass cls))
1544 {
1545 oop mirror = JNIHandles::resolve_non_null(cls);
1546 if (java_lang_Class::is_primitive(mirror)) {
1547 return nullptr;
1548 }
1549 Klass* klass = java_lang_Class::as_Klass(mirror);
1550 if (!klass->is_instance_klass()) {
1551 return nullptr;
1552 }
1553 InstanceKlass* k = InstanceKlass::cast(klass);
1554 int ooff = 0, noff = 0;
1555 if (k->find_inner_classes_attr(&ooff, &noff, THREAD)) {
1556 if (noff != 0) {
1557 constantPoolHandle i_cp(thread, k->constants());
1558 Symbol* name = i_cp->symbol_at(noff);
1559 Handle str = java_lang_String::create_from_symbol(name, CHECK_NULL);
1560 return (jstring) JNIHandles::make_local(THREAD, str());
1561 }
1562 }
1563 return nullptr;
1564 }
1565 JVM_END
1566
1567 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1568 assert (cls != nullptr, "illegal class");
1569 JvmtiVMObjectAllocEventCollector oam;
1570 ResourceMark rm(THREAD);
1571 oop mirror = JNIHandles::resolve_non_null(cls);
1572 // Return null for arrays and primitives
1573 if (!java_lang_Class::is_primitive(mirror)) {
1574 Klass* k = java_lang_Class::as_Klass(mirror);
1575 if (k->is_instance_klass()) {
1576 Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1577 if (sym == nullptr) return nullptr;
1578 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1579 return (jstring) JNIHandles::make_local(THREAD, str());
1580 }
1581 }
1582 return nullptr;
1583 JVM_END
1584
1585
1586 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1587 assert (cls != nullptr, "illegal class");
1588 oop mirror = JNIHandles::resolve_non_null(cls);
1589 // Return null for arrays and primitives
1590 if (!java_lang_Class::is_primitive(mirror)) {
1591 Klass* k = java_lang_Class::as_Klass(mirror);
1592 if (k->is_instance_klass()) {
1593 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1594 return (jbyteArray) JNIHandles::make_local(THREAD, a);
1595 }
1596 }
1597 return nullptr;
1598 JVM_END
1599
1600
1601 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd) {
1602 // some of this code was adapted from from jni_FromReflectedField
1603
1604 oop reflected = JNIHandles::resolve_non_null(field);
1605 oop mirror = java_lang_reflect_Field::clazz(reflected);
1606 Klass* k = java_lang_Class::as_Klass(mirror);
1635 int slot = 0;
1636
1637 if (reflected->klass() == vmClasses::reflect_Constructor_klass()) {
1638 mirror = java_lang_reflect_Constructor::clazz(reflected);
1639 slot = java_lang_reflect_Constructor::slot(reflected);
1640 } else {
1641 assert(reflected->klass() == vmClasses::reflect_Method_klass(),
1642 "wrong type");
1643 mirror = java_lang_reflect_Method::clazz(reflected);
1644 slot = java_lang_reflect_Method::slot(reflected);
1645 }
1646 Klass* k = java_lang_Class::as_Klass(mirror);
1647
1648 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1649 assert(m != nullptr, "cannot find method");
1650 return m; // caller has to deal with null in product mode
1651 }
1652
1653 /* Type use annotations support (JDK 1.8) */
1654
1655 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1656 assert (cls != nullptr, "illegal class");
1657 ResourceMark rm(THREAD);
1658 // Return null for arrays and primitives
1659 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1660 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1661 if (k->is_instance_klass()) {
1662 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1663 if (type_annotations != nullptr) {
1664 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1665 return (jbyteArray) JNIHandles::make_local(THREAD, a);
1666 }
1667 }
1668 }
1669 return nullptr;
1670 JVM_END
1671
1672 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1673 assert (method != nullptr, "illegal method");
1674 // method is a handle to a java.lang.reflect.Method object
1675 Method* m = jvm_get_method_common(method);
1676 if (m == nullptr) {
1677 return nullptr;
1678 }
1679
1680 AnnotationArray* type_annotations = m->type_annotations();
1681 if (type_annotations != nullptr) {
1682 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1683 return (jbyteArray) JNIHandles::make_local(THREAD, a);
1684 }
1685
1686 return nullptr;
1687 JVM_END
1688
1689 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1690 assert (field != nullptr, "illegal field");
1691 fieldDescriptor fd;
1692 bool gotFd = jvm_get_field_common(field, fd);
1693 if (!gotFd) {
1694 return nullptr;
1695 }
1696
1697 return (jbyteArray) JNIHandles::make_local(THREAD, Annotations::make_java_array(fd.type_annotations(), THREAD));
1698 JVM_END
1699
1700 static void bounds_check(const constantPoolHandle& cp, jint index, TRAPS) {
1701 if (!cp->is_within_bounds(index)) {
1702 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1703 }
1704 }
1705
1706 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1707 {
1708 // method is a handle to a java.lang.reflect.Method object
1709 Method* method_ptr = jvm_get_method_common(method);
1710 methodHandle mh (THREAD, method_ptr);
1711 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1712 const int num_params = mh->method_parameters_length();
1713
1714 if (num_params < 0) {
1715 // A -1 return value from method_parameters_length means there is no
1716 // parameter data. Return null to indicate this to the reflection
1717 // API.
1718 assert(num_params == -1, "num_params should be -1 if it is less than zero");
1719 return (jobjectArray)nullptr;
1720 } else {
1721 // Otherwise, we return something up to reflection, even if it is
1722 // a zero-length array. Why? Because in some cases this can
1723 // trigger a MalformedParametersException.
1724
1725 // make sure all the symbols are properly formatted
1726 for (int i = 0; i < num_params; i++) {
1739 objArrayOop result_oop = oopFactory::new_objArray(vmClasses::reflect_Parameter_klass(), num_params, CHECK_NULL);
1740 objArrayHandle result (THREAD, result_oop);
1741
1742 for (int i = 0; i < num_params; i++) {
1743 MethodParametersElement* params = mh->method_parameters_start();
1744 // For a 0 index, give a null symbol
1745 Symbol* sym = 0 != params[i].name_cp_index ?
1746 mh->constants()->symbol_at(params[i].name_cp_index) : nullptr;
1747 int flags = params[i].flags;
1748 oop param = Reflection::new_parameter(reflected_method, i, sym,
1749 flags, CHECK_NULL);
1750 result->obj_at_put(i, param);
1751 }
1752 return (jobjectArray)JNIHandles::make_local(THREAD, result());
1753 }
1754 }
1755 JVM_END
1756
1757 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1758
1759 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1760 {
1761 JvmtiVMObjectAllocEventCollector oam;
1762
1763 oop ofMirror = JNIHandles::resolve_non_null(ofClass);
1764 // Exclude primitive types and array types
1765 if (java_lang_Class::is_primitive(ofMirror) ||
1766 java_lang_Class::as_Klass(ofMirror)->is_array_klass()) {
1767 // Return empty array
1768 oop res = oopFactory::new_objArray(vmClasses::reflect_Field_klass(), 0, CHECK_NULL);
1769 return (jobjectArray) JNIHandles::make_local(THREAD, res);
1770 }
1771
1772 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(ofMirror));
1773 constantPoolHandle cp(THREAD, k->constants());
1774
1775 // Ensure class is linked
1776 k->link_class(CHECK_NULL);
1777
1778 // Allocate result
1779 int num_fields;
1790 objArrayOop r = oopFactory::new_objArray(vmClasses::reflect_Field_klass(), num_fields, CHECK_NULL);
1791 objArrayHandle result (THREAD, r);
1792
1793 int out_idx = 0;
1794 fieldDescriptor fd;
1795 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1796 if (!publicOnly || fs.access_flags().is_public()) {
1797 fd.reinitialize(k, fs.index());
1798 oop field = Reflection::new_field(&fd, CHECK_NULL);
1799 result->obj_at_put(out_idx, field);
1800 ++out_idx;
1801 }
1802 }
1803 assert(out_idx == num_fields, "just checking");
1804 return (jobjectArray) JNIHandles::make_local(THREAD, result());
1805 }
1806 JVM_END
1807
1808 // A class is a record if and only if it is final and a direct subclass of
1809 // java.lang.Record and has a Record attribute; otherwise, it is not a record.
1810 JVM_ENTRY(jboolean, JVM_IsRecord(JNIEnv *env, jclass cls))
1811 {
1812 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1813 if (k != nullptr && k->is_instance_klass()) {
1814 InstanceKlass* ik = InstanceKlass::cast(k);
1815 return ik->is_record();
1816 } else {
1817 return false;
1818 }
1819 }
1820 JVM_END
1821
1822 // Returns an array containing the components of the Record attribute,
1823 // or null if the attribute is not present.
1824 //
1825 // Note that this function returns the components of the Record attribute
1826 // even if the class is not a record.
1827 JVM_ENTRY(jobjectArray, JVM_GetRecordComponents(JNIEnv* env, jclass ofClass))
1828 {
1829 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass));
1830 assert(c->is_instance_klass(), "must be");
1831 InstanceKlass* ik = InstanceKlass::cast(c);
1832
1833 Array<RecordComponent*>* components = ik->record_components();
1834 if (components != nullptr) {
1835 JvmtiVMObjectAllocEventCollector oam;
1836 constantPoolHandle cp(THREAD, ik->constants());
1837 int length = components->length();
1838 assert(length >= 0, "unexpected record_components length");
1839 objArrayOop record_components =
1840 oopFactory::new_objArray(vmClasses::RecordComponent_klass(), length, CHECK_NULL);
1841 objArrayHandle components_h (THREAD, record_components);
1842
1843 for (int x = 0; x < length; x++) {
1844 RecordComponent* component = components->at(x);
1845 assert(component != nullptr, "unexpected null record component");
1846 oop component_oop = java_lang_reflect_RecordComponent::create(ik, component, CHECK_NULL);
1847 components_h->obj_at_put(x, component_oop);
1914 for (int i = 0; i < num_methods; i++) {
1915 methodHandle method(THREAD, k->method_with_idnum(idnums->at(i)));
1916 if (method.is_null()) {
1917 // Method may have been deleted and seems this API can handle null
1918 // Otherwise should probably put a method that throws NSME
1919 result->obj_at_put(i, nullptr);
1920 } else {
1921 oop m;
1922 if (want_constructor) {
1923 m = Reflection::new_constructor(method, CHECK_NULL);
1924 } else {
1925 m = Reflection::new_method(method, false, CHECK_NULL);
1926 }
1927 result->obj_at_put(i, m);
1928 }
1929 }
1930
1931 return (jobjectArray) JNIHandles::make_local(THREAD, result());
1932 }
1933
1934 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1935 {
1936 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1937 /*want_constructor*/ false,
1938 vmClasses::reflect_Method_klass(), THREAD);
1939 }
1940 JVM_END
1941
1942 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1943 {
1944 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1945 /*want_constructor*/ true,
1946 vmClasses::reflect_Constructor_klass(), THREAD);
1947 }
1948 JVM_END
1949
1950 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1951 {
1952 oop mirror = JNIHandles::resolve_non_null(cls);
1953 if (java_lang_Class::is_primitive(mirror)) {
1954 // Primitive type
1955 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1956 }
1957
1958 Klass* k = java_lang_Class::as_Klass(mirror);
1959 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1960 }
1961 JVM_END
1962
1963 JVM_ENTRY(jboolean, JVM_AreNestMates(JNIEnv *env, jclass current, jclass member))
1964 {
1965 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1966 assert(c->is_instance_klass(), "must be");
1967 InstanceKlass* ck = InstanceKlass::cast(c);
1968 Klass* m = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(member));
1969 assert(m->is_instance_klass(), "must be");
1970 InstanceKlass* mk = InstanceKlass::cast(m);
1971 return ck->has_nestmate_access_to(mk, THREAD);
1972 }
1973 JVM_END
1974
1975 JVM_ENTRY(jclass, JVM_GetNestHost(JNIEnv* env, jclass current))
1976 {
1977 // current is not a primitive or array class
1978 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1979 assert(c->is_instance_klass(), "must be");
1980 InstanceKlass* ck = InstanceKlass::cast(c);
1981 InstanceKlass* host = ck->nest_host(THREAD);
1982 return (jclass) (host == nullptr ? nullptr :
1983 JNIHandles::make_local(THREAD, host->java_mirror()));
1984 }
1985 JVM_END
1986
1987 JVM_ENTRY(jobjectArray, JVM_GetNestMembers(JNIEnv* env, jclass current))
1988 {
1989 // current is not a primitive or array class
1990 ResourceMark rm(THREAD);
1991 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1992 assert(c->is_instance_klass(), "must be");
1993 InstanceKlass* ck = InstanceKlass::cast(c);
1994 InstanceKlass* host = ck->nest_host(THREAD);
1995
1996 log_trace(class, nestmates)("Calling GetNestMembers for type %s with nest-host %s",
1997 ck->external_name(), host->external_name());
1998 {
1999 JvmtiVMObjectAllocEventCollector oam;
2000 Array<u2>* members = host->nest_members();
2001 int length = members == nullptr ? 0 : members->length();
2002
2003 log_trace(class, nestmates)(" - host has %d listed nest members", length);
2004
2005 // nest host is first in the array so make it one bigger
2006 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(),
2007 length + 1, CHECK_NULL);
2047 log_trace(class, nestmates)(" - compacting array from length %d to %d",
2048 length + 1, count + 1);
2049
2050 objArrayOop r2 = oopFactory::new_objArray(vmClasses::Class_klass(),
2051 count + 1, CHECK_NULL);
2052 objArrayHandle result2(THREAD, r2);
2053 for (int i = 0; i < count + 1; i++) {
2054 result2->obj_at_put(i, result->obj_at(i));
2055 }
2056 return (jobjectArray)JNIHandles::make_local(THREAD, result2());
2057 }
2058 }
2059 else {
2060 assert(host == ck || ck->is_hidden(), "must be singleton nest or dynamic nestmate");
2061 }
2062 return (jobjectArray)JNIHandles::make_local(THREAD, result());
2063 }
2064 }
2065 JVM_END
2066
2067 JVM_ENTRY(jobjectArray, JVM_GetPermittedSubclasses(JNIEnv* env, jclass current))
2068 {
2069 oop mirror = JNIHandles::resolve_non_null(current);
2070 assert(!java_lang_Class::is_primitive(mirror), "should not be");
2071 Klass* c = java_lang_Class::as_Klass(mirror);
2072 assert(c->is_instance_klass(), "must be");
2073 InstanceKlass* ik = InstanceKlass::cast(c);
2074 ResourceMark rm(THREAD);
2075 log_trace(class, sealed)("Calling GetPermittedSubclasses for %s type %s",
2076 ik->is_sealed() ? "sealed" : "non-sealed", ik->external_name());
2077 if (ik->is_sealed()) {
2078 JvmtiVMObjectAllocEventCollector oam;
2079 Array<u2>* subclasses = ik->permitted_subclasses();
2080 int length = subclasses->length();
2081
2082 log_trace(class, sealed)(" - sealed class has %d permitted subclasses", length);
2083
2084 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(),
2085 length, CHECK_NULL);
2086 objArrayHandle result(THREAD, r);
2087 int count = 0;
2110 }
2111 if (count < length) {
2112 // we had invalid entries so we need to compact the array
2113 objArrayOop r2 = oopFactory::new_objArray(vmClasses::Class_klass(),
2114 count, CHECK_NULL);
2115 objArrayHandle result2(THREAD, r2);
2116 for (int i = 0; i < count; i++) {
2117 result2->obj_at_put(i, result->obj_at(i));
2118 }
2119 return (jobjectArray)JNIHandles::make_local(THREAD, result2());
2120 }
2121 return (jobjectArray)JNIHandles::make_local(THREAD, result());
2122 } else {
2123 return nullptr;
2124 }
2125 }
2126 JVM_END
2127
2128 // Constant pool access //////////////////////////////////////////////////////////
2129
2130 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
2131 {
2132 JvmtiVMObjectAllocEventCollector oam;
2133 oop mirror = JNIHandles::resolve_non_null(cls);
2134 // Return null for primitives and arrays
2135 if (!java_lang_Class::is_primitive(mirror)) {
2136 Klass* k = java_lang_Class::as_Klass(mirror);
2137 if (k->is_instance_klass()) {
2138 InstanceKlass* k_h = InstanceKlass::cast(k);
2139 Handle jcp = reflect_ConstantPool::create(CHECK_NULL);
2140 reflect_ConstantPool::set_cp(jcp(), k_h->constants());
2141 return JNIHandles::make_local(THREAD, jcp());
2142 }
2143 }
2144 return nullptr;
2145 }
2146 JVM_END
2147
2148
2149 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
2150 {
2151 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2152 return cp->length();
2153 }
2154 JVM_END
2155
2156
2157 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2158 {
2159 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2160 bounds_check(cp, index, CHECK_NULL);
2161 constantTag tag = cp->tag_at(index);
2162 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
2163 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2164 }
2165 Klass* k = cp->klass_at(index, CHECK_NULL);
2166 return (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
2167 }
2168 JVM_END
2169
2170 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2171 {
2172 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2173 bounds_check(cp, index, CHECK_NULL);
2174 constantTag tag = cp->tag_at(index);
2175 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
2176 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2177 }
2178 Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
2179 if (k == nullptr) return nullptr;
2180 return (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
2181 }
2182 JVM_END
2183
2184 static jobject get_method_at_helper(const constantPoolHandle& cp, jint index, bool force_resolution, TRAPS) {
2185 constantTag tag = cp->tag_at(index);
2186 if (!tag.is_method() && !tag.is_interface_method()) {
2187 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2188 }
2189 int klass_ref = cp->uncached_klass_ref_index_at(index);
2190 Klass* k_o;
2193 } else {
2194 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2195 if (k_o == nullptr) return nullptr;
2196 }
2197 InstanceKlass* k = InstanceKlass::cast(k_o);
2198 Symbol* name = cp->uncached_name_ref_at(index);
2199 Symbol* sig = cp->uncached_signature_ref_at(index);
2200 methodHandle m (THREAD, k->find_method(name, sig));
2201 if (m.is_null()) {
2202 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
2203 }
2204 oop method;
2205 if (!m->is_initializer() || m->is_static()) {
2206 method = Reflection::new_method(m, true, CHECK_NULL);
2207 } else {
2208 method = Reflection::new_constructor(m, CHECK_NULL);
2209 }
2210 return JNIHandles::make_local(THREAD, method);
2211 }
2212
2213 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2214 {
2215 JvmtiVMObjectAllocEventCollector oam;
2216 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2217 bounds_check(cp, index, CHECK_NULL);
2218 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
2219 return res;
2220 }
2221 JVM_END
2222
2223 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2224 {
2225 JvmtiVMObjectAllocEventCollector oam;
2226 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2227 bounds_check(cp, index, CHECK_NULL);
2228 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
2229 return res;
2230 }
2231 JVM_END
2232
2233 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2234 constantTag tag = cp->tag_at(index);
2235 if (!tag.is_field()) {
2236 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2237 }
2238 int klass_ref = cp->uncached_klass_ref_index_at(index);
2239 Klass* k_o;
2240 if (force_resolution) {
2241 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2242 } else {
2243 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2244 if (k_o == nullptr) return nullptr;
2245 }
2246 InstanceKlass* k = InstanceKlass::cast(k_o);
2247 Symbol* name = cp->uncached_name_ref_at(index);
2248 Symbol* sig = cp->uncached_signature_ref_at(index);
2249 fieldDescriptor fd;
2250 Klass* target_klass = k->find_field(name, sig, &fd);
2251 if (target_klass == nullptr) {
2252 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2253 }
2254 oop field = Reflection::new_field(&fd, CHECK_NULL);
2255 return JNIHandles::make_local(THREAD, field);
2256 }
2257
2258 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
2259 {
2260 JvmtiVMObjectAllocEventCollector oam;
2261 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2262 bounds_check(cp, index, CHECK_NULL);
2263 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2264 return res;
2265 }
2266 JVM_END
2267
2268 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2269 {
2270 JvmtiVMObjectAllocEventCollector oam;
2271 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2272 bounds_check(cp, index, CHECK_NULL);
2273 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2274 return res;
2275 }
2276 JVM_END
2277
2278 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2279 {
2280 JvmtiVMObjectAllocEventCollector oam;
2281 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2282 bounds_check(cp, index, CHECK_NULL);
2283 constantTag tag = cp->tag_at(index);
2284 if (!tag.is_field_or_method()) {
2285 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2286 }
2287 int klass_ref = cp->uncached_klass_ref_index_at(index);
2288 Symbol* klass_name = cp->klass_name_at(klass_ref);
2289 Symbol* member_name = cp->uncached_name_ref_at(index);
2290 Symbol* member_sig = cp->uncached_signature_ref_at(index);
2291 objArrayOop dest_o = oopFactory::new_objArray(vmClasses::String_klass(), 3, CHECK_NULL);
2292 objArrayHandle dest(THREAD, dest_o);
2293 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2294 dest->obj_at_put(0, str());
2295 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2296 dest->obj_at_put(1, str());
2297 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2298 dest->obj_at_put(2, str());
2299 return (jobjectArray) JNIHandles::make_local(THREAD, dest());
2300 }
2301 JVM_END
2302
2303 JVM_ENTRY(jint, JVM_ConstantPoolGetClassRefIndexAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2304 {
2305 JvmtiVMObjectAllocEventCollector oam;
2306 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2307 bounds_check(cp, index, CHECK_0);
2308 constantTag tag = cp->tag_at(index);
2309 if (!tag.is_field_or_method()) {
2310 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2311 }
2312 return (jint) cp->uncached_klass_ref_index_at(index);
2313 }
2314 JVM_END
2315
2316 JVM_ENTRY(jint, JVM_ConstantPoolGetNameAndTypeRefIndexAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2317 {
2318 JvmtiVMObjectAllocEventCollector oam;
2319 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2320 bounds_check(cp, index, CHECK_0);
2321 constantTag tag = cp->tag_at(index);
2322 if (!tag.is_invoke_dynamic() && !tag.is_field_or_method()) {
2323 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2324 }
2325 return (jint) cp->uncached_name_and_type_ref_index_at(index);
2326 }
2327 JVM_END
2328
2329 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetNameAndTypeRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2330 {
2331 JvmtiVMObjectAllocEventCollector oam;
2332 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2333 bounds_check(cp, index, CHECK_NULL);
2334 constantTag tag = cp->tag_at(index);
2335 if (!tag.is_name_and_type()) {
2336 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2337 }
2338 Symbol* member_name = cp->symbol_at(cp->name_ref_index_at(index));
2339 Symbol* member_sig = cp->symbol_at(cp->signature_ref_index_at(index));
2340 objArrayOop dest_o = oopFactory::new_objArray(vmClasses::String_klass(), 2, CHECK_NULL);
2341 objArrayHandle dest(THREAD, dest_o);
2342 Handle str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2343 dest->obj_at_put(0, str());
2344 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2345 dest->obj_at_put(1, str());
2346 return (jobjectArray) JNIHandles::make_local(THREAD, dest());
2347 }
2348 JVM_END
2349
2350 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2351 {
2352 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2353 bounds_check(cp, index, CHECK_0);
2354 constantTag tag = cp->tag_at(index);
2355 if (!tag.is_int()) {
2356 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2357 }
2358 return cp->int_at(index);
2359 }
2360 JVM_END
2361
2362 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(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_(0L));
2366 constantTag tag = cp->tag_at(index);
2367 if (!tag.is_long()) {
2368 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2369 }
2370 return cp->long_at(index);
2371 }
2372 JVM_END
2373
2374 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(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_(0.0f));
2378 constantTag tag = cp->tag_at(index);
2379 if (!tag.is_float()) {
2380 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2381 }
2382 return cp->float_at(index);
2383 }
2384 JVM_END
2385
2386 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(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_(0.0));
2390 constantTag tag = cp->tag_at(index);
2391 if (!tag.is_double()) {
2392 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2393 }
2394 return cp->double_at(index);
2395 }
2396 JVM_END
2397
2398 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(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_NULL);
2402 constantTag tag = cp->tag_at(index);
2403 if (!tag.is_string()) {
2404 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2405 }
2406 oop str = cp->string_at(index, CHECK_NULL);
2407 return (jstring) JNIHandles::make_local(THREAD, str);
2408 }
2409 JVM_END
2410
2411 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
2412 {
2413 JvmtiVMObjectAllocEventCollector oam;
2414 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2415 bounds_check(cp, index, CHECK_NULL);
2416 constantTag tag = cp->tag_at(index);
2417 if (!tag.is_symbol()) {
2418 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2419 }
2420 Symbol* sym = cp->symbol_at(index);
2421 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2422 return (jstring) JNIHandles::make_local(THREAD, str());
2423 }
2424 JVM_END
2425
2426 JVM_ENTRY(jbyte, JVM_ConstantPoolGetTagAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2427 {
2428 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2429 bounds_check(cp, index, CHECK_0);
2430 constantTag tag = cp->tag_at(index);
2431 jbyte result = tag.value();
2432 // If returned tag values are not from the JVM spec, e.g. tags from 100 to 105,
2433 // they are changed to the corresponding tags from the JVM spec, so that java code in
2434 // sun.reflect.ConstantPool will return only tags from the JVM spec, not internal ones.
2435 if (tag.is_klass_or_reference()) {
2436 result = JVM_CONSTANT_Class;
2437 } else if (tag.is_string_index()) {
2438 result = JVM_CONSTANT_String;
2439 } else if (tag.is_method_type_in_error()) {
2440 result = JVM_CONSTANT_MethodType;
2441 } else if (tag.is_method_handle_in_error()) {
2442 result = JVM_CONSTANT_MethodHandle;
2443 } else if (tag.is_dynamic_constant_in_error()) {
2444 result = JVM_CONSTANT_Dynamic;
2445 }
2446 return result;
2447 }
2448 JVM_END
2449
2450 // Assertion support. //////////////////////////////////////////////////////////
2451
2452 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2453 assert(cls != nullptr, "bad class");
2454
2455 oop r = JNIHandles::resolve(cls);
2456 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2457 if (java_lang_Class::is_primitive(r)) return false;
2458
2459 Klass* k = java_lang_Class::as_Klass(r);
2460 assert(k->is_instance_klass(), "must be an instance klass");
2461 if (!k->is_instance_klass()) return false;
2462
2463 ResourceMark rm(THREAD);
2464 const char* name = k->name()->as_C_string();
2465 bool system_class = k->class_loader() == nullptr;
2466 return JavaAssertions::enabled(name, system_class);
2467
2468 JVM_END
2469
2470
2471 // Return a new AssertionStatusDirectives object with the fields filled in with
2472 // command-line assertion arguments (i.e., -ea, -da).
2473 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2474 JvmtiVMObjectAllocEventCollector oam;
2475 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2476 return JNIHandles::make_local(THREAD, asd);
2477 JVM_END
2478
2479 // Verification ////////////////////////////////////////////////////////////////////////////////
2480
2481 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2482
2483 // RedefineClasses support: bug 6214132 caused verification to fail.
2484 // All functions from this section should call the jvmtiThreadSate function:
2485 // Klass* class_to_verify_considering_redefinition(Klass* klass).
2486 // The function returns a Klass* of the _scratch_class if the verifier
2487 // was invoked in the middle of the class redefinition.
2488 // Otherwise it returns its argument value which is the _the_class Klass*.
2489 // Please, refer to the description in the jvmtiThreadSate.hpp.
2490
2491 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2492 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2493 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2494 return k->name()->as_utf8();
2495 JVM_END
2496
2497
2498 JVM_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2499 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2500 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2501 // types will have length zero if this is not an InstanceKlass
2502 // (length is determined by call to JVM_GetClassCPEntriesCount)
2503 if (k->is_instance_klass()) {
2504 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2505 for (int index = cp->length() - 1; index >= 0; index--) {
2506 constantTag tag = cp->tag_at(index);
2507 types[index] = (tag.is_unresolved_klass()) ? (unsigned char) JVM_CONSTANT_Class : tag.value();
2508 }
2509 }
2510 JVM_END
2511
2512
2513 JVM_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2514 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2515 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2516 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->constants()->length();
2517 JVM_END
2518
2519
2520 JVM_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2521 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2522 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2523 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->java_fields_count();
2524 JVM_END
2525
2526
2527 JVM_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2528 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2529 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2530 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->methods()->length();
2531 JVM_END
2532
2533
2534 // The following methods, used for the verifier, are never called with
2535 // array klasses, so a direct cast to InstanceKlass is safe.
2536 // Typically, these methods are called in a loop with bounds determined
2537 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2538 // zero for arrays.
2539 JVM_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2540 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2541 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2542 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2543 int length = method->checked_exceptions_length();
2544 if (length > 0) {
2545 CheckedExceptionElement* table= method->checked_exceptions_start();
2546 for (int i = 0; i < length; i++) {
2547 exceptions[i] = table[i].class_cp_index;
2548 }
2549 }
2550 JVM_END
2551
2552
2553 JVM_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2554 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2555 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2556 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2557 return method->checked_exceptions_length();
2558 JVM_END
2559
2560
2561 JVM_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2562 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2563 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2564 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2565 memcpy(code, method->code_base(), method->code_size());
2566 JVM_END
2567
2568
2569 JVM_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2570 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2571 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2572 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2573 return method->code_size();
2574 JVM_END
2575
2576
2577 JVM_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2578 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2579 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2580 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2581 ExceptionTable extable(method);
2582 entry->start_pc = extable.start_pc(entry_index);
2583 entry->end_pc = extable.end_pc(entry_index);
2584 entry->handler_pc = extable.handler_pc(entry_index);
2585 entry->catchType = extable.catch_type_index(entry_index);
2586 JVM_END
2587
2588
2589 JVM_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
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 return method->exception_table_length();
2594 JVM_END
2595
2596
2597 JVM_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2598 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2599 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2600 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2601 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2602 JVM_END
2603
2604
2605 JVM_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2606 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2607 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2608 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2609 JVM_END
2610
2611
2612 JVM_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2613 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2614 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2615 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2616 return method->max_locals();
2617 JVM_END
2618
2619
2620 JVM_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2621 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2622 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2623 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2624 return method->size_of_parameters();
2625 JVM_END
2626
2627
2628 JVM_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2629 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2630 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2631 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2632 return method->verifier_max_stack();
2633 JVM_END
2634
2635
2636 JVM_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2637 ResourceMark rm(THREAD);
2638 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2639 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2640 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2641 return method->name() == vmSymbols::object_initializer_name();
2642 JVM_END
2643
2644
2645 JVM_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2646 ResourceMark rm(THREAD);
2647 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2648 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2649 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2650 return method->is_overpass();
2651 JVM_END
2652
2653 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2654 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2655 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2656 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2657 return method->name()->as_utf8();
2658 JVM_END
2659
2660
2661 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2662 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2663 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2664 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2665 return method->signature()->as_utf8();
2666 JVM_END
2667
2668 /**
2669 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2670 * read entries in the constant pool. Since the old verifier always
2671 * works on a copy of the code, it will not see any rewriting that
2672 * may possibly occur in the middle of verification. So it is important
2673 * that nothing it calls tries to use the cpCache instead of the raw
2674 * constant pool, so we must use cp->uncached_x methods when appropriate.
2675 */
2676 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2677 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2678 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2679 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2680 switch (cp->tag_at(cp_index).value()) {
2681 case JVM_CONSTANT_Fieldref:
2682 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2683 default:
2684 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2685 }
2686 ShouldNotReachHere();
2687 return nullptr;
2688 JVM_END
2689
2690
2691 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2692 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2693 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2694 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2695 switch (cp->tag_at(cp_index).value()) {
2696 case JVM_CONSTANT_InterfaceMethodref:
2697 case JVM_CONSTANT_Methodref:
2698 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2699 default:
2700 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2701 }
2702 ShouldNotReachHere();
2703 return nullptr;
2704 JVM_END
2705
2706
2707 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2708 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2709 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2710 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2711 switch (cp->tag_at(cp_index).value()) {
2712 case JVM_CONSTANT_InterfaceMethodref:
2713 case JVM_CONSTANT_Methodref:
2714 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2715 default:
2716 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2717 }
2718 ShouldNotReachHere();
2719 return nullptr;
2720 JVM_END
2721
2722
2723 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2724 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2725 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2726 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2727 switch (cp->tag_at(cp_index).value()) {
2728 case JVM_CONSTANT_Fieldref:
2729 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2730 default:
2731 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2732 }
2733 ShouldNotReachHere();
2734 return nullptr;
2735 JVM_END
2736
2737
2738 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2739 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2740 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2741 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2742 Symbol* classname = cp->klass_name_at(cp_index);
2743 return classname->as_utf8();
2744 JVM_END
2745
2746
2747 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2748 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2749 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2750 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2751 switch (cp->tag_at(cp_index).value()) {
2752 case JVM_CONSTANT_Fieldref: {
2753 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2754 Symbol* classname = cp->klass_name_at(class_index);
2755 return classname->as_utf8();
2756 }
2757 default:
2758 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2759 }
2760 ShouldNotReachHere();
2761 return nullptr;
2762 JVM_END
2763
2764
2765 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2766 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2767 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2768 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2769 switch (cp->tag_at(cp_index).value()) {
2770 case JVM_CONSTANT_Methodref:
2771 case JVM_CONSTANT_InterfaceMethodref: {
2772 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2773 Symbol* classname = cp->klass_name_at(class_index);
2774 return classname->as_utf8();
2775 }
2776 default:
2777 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2778 }
2779 ShouldNotReachHere();
2780 return nullptr;
2781 JVM_END
2782
2783
2784 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2785 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2786 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2787 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2788 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2789 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2790 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2791 switch (cp->tag_at(cp_index).value()) {
2792 case JVM_CONSTANT_Fieldref: {
2793 Symbol* name = cp->uncached_name_ref_at(cp_index);
2794 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2795 InstanceKlass* ik = InstanceKlass::cast(k_called);
2796 for (JavaFieldStream fs(ik); !fs.done(); fs.next()) {
2797 if (fs.name() == name && fs.signature() == signature) {
2798 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2799 }
2800 }
2801 return -1;
2802 }
2803 default:
2804 fatal("JVM_GetCPFieldModifiers: illegal constant");
2805 }
2806 ShouldNotReachHere();
2807 return 0;
2808 JVM_END
2809
2810
2811 JVM_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2812 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2813 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2814 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2815 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2816 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2817 switch (cp->tag_at(cp_index).value()) {
2818 case JVM_CONSTANT_Methodref:
2819 case JVM_CONSTANT_InterfaceMethodref: {
2820 Symbol* name = cp->uncached_name_ref_at(cp_index);
2821 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2822 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2823 int methods_count = methods->length();
2824 for (int i = 0; i < methods_count; i++) {
2825 Method* method = methods->at(i);
2826 if (method->name() == name && method->signature() == signature) {
2827 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2828 }
2829 }
2830 return -1;
2831 }
2832 default:
2833 fatal("JVM_GetCPMethodModifiers: illegal constant");
2834 }
2835 ShouldNotReachHere();
2836 return 0;
2837 JVM_END
2838
2839
2840 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2841
2842 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2843 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2844 JVM_END
2845
2846
2847 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2848 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2849 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2850 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2851 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2852 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2853 JVM_END
2854
2855 // Printing support //////////////////////////////////////////////////
2856 extern "C" {
2857
2858 ATTRIBUTE_PRINTF(3, 0)
2859 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2860 // Reject count values that are negative signed values converted to
2861 // unsigned; see bug 4399518, 4417214
2862 if ((intptr_t)count <= 0) return -1;
2863
2864 int result = os::vsnprintf(str, count, fmt, args);
2865 if (result > 0 && (size_t)result >= count) {
2866 result = -1;
2867 }
2926 // In most of the JVM thread support functions we need to access the
2927 // thread through a ThreadsListHandle to prevent it from exiting and
2928 // being reclaimed while we try to operate on it. The exceptions to this
2929 // rule are when operating on the current thread, or if the monitor of
2930 // the target java.lang.Thread is locked at the Java level - in both
2931 // cases the target cannot exit.
2932
2933 static void thread_entry(JavaThread* thread, TRAPS) {
2934 HandleMark hm(THREAD);
2935 Handle obj(THREAD, thread->threadObj());
2936 JavaValue result(T_VOID);
2937 JavaCalls::call_virtual(&result,
2938 obj,
2939 vmClasses::Thread_klass(),
2940 vmSymbols::run_method_name(),
2941 vmSymbols::void_method_signature(),
2942 THREAD);
2943 }
2944
2945
2946 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2947 #if INCLUDE_CDS
2948 if (CDSConfig::is_dumping_static_archive()) {
2949 // During java -Xshare:dump, if we allow multiple Java threads to
2950 // execute in parallel, symbols and classes may be loaded in
2951 // random orders which will make the resulting CDS archive
2952 // non-deterministic.
2953 //
2954 // Lucikly, during java -Xshare:dump, it's important to run only
2955 // the code in the main Java thread (which is NOT started here) that
2956 // creates the module graph, etc. It's safe to not start the other
2957 // threads which are launched by class static initializers
2958 // (ReferenceHandler, FinalizerThread and CleanerImpl).
2959 if (log_is_enabled(Info, cds)) {
2960 ResourceMark rm;
2961 oop t = JNIHandles::resolve_non_null(jthread);
2962 log_info(cds)("JVM_StartThread() ignored: %s", t->klass()->external_name());
2963 }
2964 return;
2965 }
2966 #endif
2967 JavaThread *native_thread = nullptr;
2968
3022 log_warning(os, thread)("Failed to start the native thread for java.lang.Thread \"%s\"",
3023 JavaThread::name_for(JNIHandles::resolve_non_null(jthread)));
3024 // No one should hold a reference to the 'native_thread'.
3025 native_thread->smr_delete();
3026 if (JvmtiExport::should_post_resource_exhausted()) {
3027 JvmtiExport::post_resource_exhausted(
3028 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
3029 os::native_thread_creation_failed_msg());
3030 }
3031 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
3032 os::native_thread_creation_failed_msg());
3033 }
3034
3035 JFR_ONLY(Jfr::on_java_thread_start(thread, native_thread);)
3036
3037 Thread::start(native_thread);
3038
3039 JVM_END
3040
3041
3042 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
3043 ThreadsListHandle tlh(thread);
3044 oop java_thread = nullptr;
3045 JavaThread* receiver = nullptr;
3046 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, &java_thread);
3047 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
3048
3049 if (is_alive) {
3050 // jthread refers to a live JavaThread.
3051 Thread::set_priority(receiver, (ThreadPriority)prio);
3052 }
3053 // Implied else: If the JavaThread hasn't started yet, then the
3054 // priority set in the java.lang.Thread object above will be pushed
3055 // down when it does start.
3056 JVM_END
3057
3058
3059 JVM_LEAF(void, JVM_Yield(JNIEnv *env, jclass threadClass))
3060 if (os::dont_yield()) return;
3061 HOTSPOT_THREAD_YIELD();
3062 os::naked_yield();
3063 JVM_END
3064
3065 JVM_ENTRY(void, JVM_SleepNanos(JNIEnv* env, jclass threadClass, jlong nanos))
3066 if (nanos < 0) {
3067 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "nanosecond timeout value out of range");
3068 }
3069
3070 if (thread->is_interrupted(true) && !HAS_PENDING_EXCEPTION) {
3071 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3072 }
3073
3074 // Save current thread state and restore it at the end of this block.
3075 // And set new thread state to SLEEPING.
3076 JavaThreadSleepState jtss(thread);
3077
3078 HOTSPOT_THREAD_SLEEP_BEGIN(nanos / NANOSECS_PER_MILLISEC);
3079
3080 if (nanos == 0) {
3081 os::naked_yield();
3082 } else {
3083 ThreadState old_state = thread->osthread()->get_state();
3084 thread->osthread()->set_state(SLEEPING);
3085 if (!thread->sleep_nanos(nanos)) { // interrupted
3086 // An asynchronous exception could have been thrown on
3087 // us while we were sleeping. We do not overwrite those.
3088 if (!HAS_PENDING_EXCEPTION) {
3089 HOTSPOT_THREAD_SLEEP_END(1);
3090
3091 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
3092 // to properly restore the thread state. That's likely wrong.
3093 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3094 }
3095 }
3096 thread->osthread()->set_state(old_state);
3097 }
3098 HOTSPOT_THREAD_SLEEP_END(0);
3099 JVM_END
3100
3101 JVM_ENTRY(jobject, JVM_CurrentCarrierThread(JNIEnv* env, jclass threadClass))
3102 oop jthread = thread->threadObj();
3103 assert(jthread != nullptr, "no current carrier thread!");
3104 return JNIHandles::make_local(THREAD, jthread);
3105 JVM_END
3106
3107 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
3108 oop theThread = thread->vthread();
3109 assert(theThread != (oop)nullptr, "no current thread!");
3110 return JNIHandles::make_local(THREAD, theThread);
3111 JVM_END
3112
3113 JVM_ENTRY(void, JVM_SetCurrentThread(JNIEnv* env, jobject thisThread,
3114 jobject theThread))
3115 oop threadObj = JNIHandles::resolve(theThread);
3116 thread->set_vthread(threadObj);
3117 JFR_ONLY(Jfr::on_set_current_thread(thread, threadObj);)
3118 JVM_END
3119
3120 JVM_ENTRY(jlong, JVM_GetNextThreadIdOffset(JNIEnv* env, jclass threadClass))
3121 return ThreadIdentifier::unsafe_offset();
3122 JVM_END
3123
3124 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
3125 ThreadsListHandle tlh(thread);
3126 JavaThread* receiver = nullptr;
3127 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, nullptr);
3128 if (is_alive) {
3129 // jthread refers to a live JavaThread.
3130 receiver->interrupt();
3131 }
3132 JVM_END
3133
3134 // Return true iff the current thread has locked the object passed in
3135
3136 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3137 if (obj == nullptr) {
3138 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3139 }
3140 Handle h_obj(THREAD, JNIHandles::resolve(obj));
3141 return ObjectSynchronizer::current_thread_holds_lock(thread, h_obj);
3142 JVM_END
3143
3144 JVM_ENTRY(jobject, JVM_GetStackTrace(JNIEnv *env, jobject jthread))
3145 oop trace = java_lang_Thread::async_get_stack_trace(JNIHandles::resolve(jthread), THREAD);
3146 return JNIHandles::make_local(THREAD, trace);
3147 JVM_END
3148
3149 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
3150 VM_PrintThreads op;
3151 VMThread::execute(&op);
3152 if (JvmtiExport::should_post_data_dump()) {
3153 JvmtiExport::post_data_dump();
3154 }
3155 JVM_END
3156
3157 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3158 // We don't use a ThreadsListHandle here because the current thread
3159 // must be alive.
3160 oop java_thread = JNIHandles::resolve_non_null(jthread);
3161 JavaThread* thr = java_lang_Thread::thread(java_thread);
3162 if (thread == thr && !thr->has_attached_via_jni()) {
3163 // Thread naming is only supported for the current thread and
3164 // we don't set the name of an attached thread to avoid stepping
3165 // on other programs.
3166 ResourceMark rm(thread);
3167 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3168 os::set_native_thread_name(thread_name);
3169 }
3170 JVM_END
3171
3172 JVM_ENTRY(jobject, JVM_ScopedValueCache(JNIEnv* env, jclass threadClass))
3173 oop theCache = thread->scopedValueCache();
3174 return JNIHandles::make_local(THREAD, theCache);
3175 JVM_END
3176
3177 JVM_ENTRY(void, JVM_SetScopedValueCache(JNIEnv* env, jclass threadClass,
3178 jobject theCache))
3179 arrayOop objs = arrayOop(JNIHandles::resolve(theCache));
3180 thread->set_scopedValueCache(objs);
3181 JVM_END
3182
3183 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3184
3185 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3186 ResourceMark rm(THREAD);
3187 JvmtiVMObjectAllocEventCollector oam;
3188 vframeStream vfst(thread);
3189
3190 if (vmClasses::reflect_CallerSensitive_klass() != nullptr) {
3191 // This must only be called from SecurityManager.getClassContext
3192 Method* m = vfst.method();
3193 if (!(m->method_holder() == vmClasses::SecurityManager_klass() &&
3194 m->name() == vmSymbols::getClassContext_name() &&
3195 m->signature() == vmSymbols::void_class_array_signature())) {
3196 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext");
3197 }
3198 }
3199
3200 // Collect method holders
3201 GrowableArray<Klass*>* klass_array = new GrowableArray<Klass*>();
3202 for (; !vfst.at_end(); vfst.security_next()) {
3203 Method* m = vfst.method();
3204 // Native frames are not returned
3205 if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) {
3206 Klass* holder = m->method_holder();
3207 assert(holder->is_klass(), "just checking");
3208 klass_array->append(holder);
3209 }
3210 }
3211
3212 // Create result array of type [Ljava/lang/Class;
3213 objArrayOop result = oopFactory::new_objArray(vmClasses::Class_klass(), klass_array->length(), CHECK_NULL);
3214 // Fill in mirrors corresponding to method holders
3215 for (int i = 0; i < klass_array->length(); i++) {
3216 result->obj_at_put(i, klass_array->at(i)->java_mirror());
3217 }
3218
3219 return (jobjectArray) JNIHandles::make_local(THREAD, result);
3220 JVM_END
3221
3222
3223 // java.lang.Package ////////////////////////////////////////////////////////////////
3224
3225
3226 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3227 ResourceMark rm(THREAD);
3228 JvmtiVMObjectAllocEventCollector oam;
3229 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3230 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3231 return (jstring) JNIHandles::make_local(THREAD, result);
3232 JVM_END
3233
3234
3235 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3236 JvmtiVMObjectAllocEventCollector oam;
3237 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3238 return (jobjectArray) JNIHandles::make_local(THREAD, result);
3239 JVM_END
3240
3241
3242 // java.lang.ref.Reference ///////////////////////////////////////////////////////////////
3243
3244
3245 JVM_ENTRY(jobject, JVM_GetAndClearReferencePendingList(JNIEnv* env))
3246 MonitorLocker ml(Heap_lock);
3247 oop ref = Universe::reference_pending_list();
3248 if (ref != nullptr) {
3249 Universe::clear_reference_pending_list();
3250 }
3251 return JNIHandles::make_local(THREAD, ref);
3252 JVM_END
3253
3254 JVM_ENTRY(jboolean, JVM_HasReferencePendingList(JNIEnv* env))
3255 MonitorLocker ml(Heap_lock);
3256 return Universe::has_reference_pending_list();
3257 JVM_END
3258
3259 JVM_ENTRY(void, JVM_WaitForReferencePendingList(JNIEnv* env))
3260 MonitorLocker ml(Heap_lock);
3261 while (!Universe::has_reference_pending_list()) {
3262 ml.wait();
3263 }
3264 JVM_END
3265
3266 JVM_ENTRY(jboolean, JVM_ReferenceRefersTo(JNIEnv* env, jobject ref, jobject o))
3267 oop ref_oop = JNIHandles::resolve_non_null(ref);
3268 // PhantomReference has it's own implementation of refersTo().
3269 // See: JVM_PhantomReferenceRefersTo
3270 assert(!java_lang_ref_Reference::is_phantom(ref_oop), "precondition");
3271 oop referent = java_lang_ref_Reference::weak_referent_no_keepalive(ref_oop);
3272 return referent == JNIHandles::resolve(o);
3273 JVM_END
3274
3275 JVM_ENTRY(void, JVM_ReferenceClear(JNIEnv* env, jobject ref))
3276 oop ref_oop = JNIHandles::resolve_non_null(ref);
3277 // FinalReference has it's own implementation of clear().
3278 assert(!java_lang_ref_Reference::is_final(ref_oop), "precondition");
3279 if (java_lang_ref_Reference::unknown_referent_no_keepalive(ref_oop) == nullptr) {
3280 // If the referent has already been cleared then done.
3281 // However, if the referent is dead but has not yet been cleared by
3282 // concurrent reference processing, it should NOT be cleared here.
3283 // Instead, clearing should be left to the GC. Clearing it here could
3284 // detectably lose an expected notification, which is impossible with
3285 // STW reference processing. The clearing in enqueue() doesn't have
3286 // this problem, since the enqueue covers the notification, but it's not
3287 // worth the effort to handle that case specially.
3288 return;
3289 }
3290 java_lang_ref_Reference::clear_referent(ref_oop);
3291 JVM_END
3292
3293
3294 // java.lang.ref.PhantomReference //////////////////////////////////////////////////
3295
3296
3297 JVM_ENTRY(jboolean, JVM_PhantomReferenceRefersTo(JNIEnv* env, jobject ref, jobject o))
3298 oop ref_oop = JNIHandles::resolve_non_null(ref);
3299 oop referent = java_lang_ref_Reference::phantom_referent_no_keepalive(ref_oop);
3300 return referent == JNIHandles::resolve(o);
3301 JVM_END
3302
3303
3304 // ObjectInputStream ///////////////////////////////////////////////////////////////
3305
3306 // Return the first user-defined class loader up the execution stack, or null
3307 // if only code from the bootstrap or platform class loader is on the stack.
3308
3309 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3310 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3311 InstanceKlass* ik = vfst.method()->method_holder();
3312 oop loader = ik->class_loader();
3313 if (loader != nullptr && !SystemDictionary::is_platform_class_loader(loader)) {
3314 // Skip reflection related frames
3315 if (!ik->is_subclass_of(vmClasses::reflect_SerializationConstructorAccessorImpl_klass())) {
3316 return JNIHandles::make_local(THREAD, loader);
3317 }
3318 }
3319 }
3320 return nullptr;
3321 JVM_END
3322
3323
3324 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3325
3326
3327 // resolve array handle and check arguments
3328 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3329 if (arr == nullptr) {
3330 THROW_0(vmSymbols::java_lang_NullPointerException());
3331 }
3332 oop a = JNIHandles::resolve_non_null(arr);
3333 if (!a->is_array()) {
3334 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3335 } else if (type_array_only && !a->is_typeArray()) {
3336 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array of primitive type");
3337 }
3338 return arrayOop(a);
3339 }
3340
3341
3342 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3343 arrayOop a = check_array(env, arr, false, CHECK_0);
3344 return a->length();
3345 JVM_END
3346
3347
3348 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3349 JvmtiVMObjectAllocEventCollector oam;
3350 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3351 jvalue value;
3352 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3353 oop box = Reflection::box(&value, type, CHECK_NULL);
3354 return JNIHandles::make_local(THREAD, box);
3355 JVM_END
3356
3357
3358 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3359 jvalue value;
3360 value.i = 0; // to initialize value before getting used in CHECK
3361 arrayOop a = check_array(env, arr, true, CHECK_(value));
3362 assert(a->is_typeArray(), "just checking");
3363 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3364 BasicType wide_type = (BasicType) wCode;
3365 if (type != wide_type) {
3366 Reflection::widen(&value, type, wide_type, CHECK_(value));
3367 }
3368 return value;
3369 JVM_END
3370
3371
3372 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3373 arrayOop a = check_array(env, arr, false, CHECK);
3374 oop box = JNIHandles::resolve(val);
3375 jvalue value;
3376 value.i = 0; // to initialize value before getting used in CHECK
3377 BasicType value_type;
3378 if (a->is_objArray()) {
3379 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3380 value_type = Reflection::unbox_for_regular_object(box, &value);
3381 } else {
3382 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3383 }
3384 Reflection::array_set(&value, a, index, value_type, CHECK);
3385 JVM_END
3386
3387
3388 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3389 arrayOop a = check_array(env, arr, true, CHECK);
3390 assert(a->is_typeArray(), "just checking");
3391 BasicType value_type = (BasicType) vCode;
3392 Reflection::array_set(&v, a, index, value_type, CHECK);
3393 JVM_END
3394
3395
3396 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3397 JvmtiVMObjectAllocEventCollector oam;
3398 oop element_mirror = JNIHandles::resolve(eltClass);
3399 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3400 return JNIHandles::make_local(THREAD, result);
3401 JVM_END
3402
3403
3404 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3405 JvmtiVMObjectAllocEventCollector oam;
3406 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3407 oop element_mirror = JNIHandles::resolve(eltClass);
3408 assert(dim_array->is_typeArray(), "just checking");
3409 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3410 return JNIHandles::make_local(THREAD, result);
3411 JVM_END
3412
3413
3414 // Library support ///////////////////////////////////////////////////////////////////////////
3415
3416 JVM_LEAF(void*, JVM_LoadZipLibrary())
3417 return ZipLibrary::handle();
3418 JVM_END
3419
3420 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name, jboolean throwException))
3421 //%note jvm_ct
3422 char ebuf[1024];
3423 void *load_result;
3424 {
3425 ThreadToNativeFromVM ttnfvm(thread);
3426 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3427 }
3428 if (load_result == nullptr) {
3429 if (throwException) {
3430 char msg[1024];
3431 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3432 // Since 'ebuf' may contain a string encoded using
3433 // platform encoding scheme, we need to pass
3434 // Exceptions::unsafe_to_utf8 to the new_exception method
3435 // as the last argument. See bug 6367357.
3436 Handle h_exception =
3437 Exceptions::new_exception(thread,
3438 vmSymbols::java_lang_UnsatisfiedLinkError(),
3439 msg, Exceptions::unsafe_to_utf8);
3440
3441 THROW_HANDLE_0(h_exception);
3442 } else {
3443 log_info(library)("Failed to load library %s", name);
3444 return load_result;
3445 }
3446 }
3447 log_info(library)("Loaded library %s, handle " INTPTR_FORMAT, name, p2i(load_result));
3448 return load_result;
3449 JVM_END
3450
3451
3452 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3453 os::dll_unload(handle);
3454 log_info(library)("Unloaded library with handle " INTPTR_FORMAT, p2i(handle));
3455 JVM_END
3456
3457
3458 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3459 void* find_result = os::dll_lookup(handle, name);
3460 log_info(library)("%s %s in library with handle " INTPTR_FORMAT,
3461 find_result != nullptr ? "Found" : "Failed to find",
3462 name, p2i(handle));
3463 return find_result;
3464 JVM_END
3465
3466
3467 // JNI version ///////////////////////////////////////////////////////////////////////////////
3468
3469 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3470 return Threads::is_supported_jni_version_including_1_1(version);
3471 JVM_END
3472
3473
3474 JVM_LEAF(jboolean, JVM_IsPreviewEnabled(void))
3475 return Arguments::enable_preview() ? JNI_TRUE : JNI_FALSE;
3476 JVM_END
3477
3478 JVM_LEAF(jboolean, JVM_IsContinuationsSupported(void))
3479 return VMContinuations ? JNI_TRUE : JNI_FALSE;
3480 JVM_END
3481
3482 JVM_LEAF(jboolean, JVM_IsForeignLinkerSupported(void))
3483 return ForeignGlobals::is_foreign_linker_supported() ? JNI_TRUE : JNI_FALSE;
3484 JVM_END
3485
3486 // String support ///////////////////////////////////////////////////////////////////////////
3487
3488 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3489 JvmtiVMObjectAllocEventCollector oam;
3490 if (str == nullptr) return nullptr;
3491 oop string = JNIHandles::resolve_non_null(str);
3492 oop result = StringTable::intern(string, CHECK_NULL);
3493 return (jstring) JNIHandles::make_local(THREAD, result);
3494 JVM_END
3495
3496
3497 // VM Raw monitor support //////////////////////////////////////////////////////////////////////
3498
3499 // VM Raw monitors (not to be confused with JvmtiRawMonitors) are a simple mutual exclusion
3500 // lock (not actually monitors: no wait/notify) that is exported by the VM for use by JDK
3501 // library code. They may be used by JavaThreads and non-JavaThreads and do not participate
3502 // in the safepoint protocol, thread suspension, thread interruption, or anything of that
3503 // nature. JavaThreads will be "in native" when using this API from JDK code.
3504
3505
3506 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3507 VM_Exit::block_if_vm_exited();
3508 return new PlatformMutex();
3534 Handle loader, Handle protection_domain,
3535 jboolean throwError, TRAPS) {
3536 // Security Note:
3537 // The Java level wrapper will perform the necessary security check allowing
3538 // us to pass the null as the initiating class loader. The VM is responsible for
3539 // the checkPackageAccess relative to the initiating class loader via the
3540 // protection_domain. The protection_domain is passed as null by the java code
3541 // if there is no security manager in 3-arg Class.forName().
3542 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
3543
3544 // Check if we should initialize the class
3545 if (init && klass->is_instance_klass()) {
3546 klass->initialize(CHECK_NULL);
3547 }
3548 return (jclass) JNIHandles::make_local(THREAD, klass->java_mirror());
3549 }
3550
3551
3552 // Method ///////////////////////////////////////////////////////////////////////////////////////////
3553
3554 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
3555 Handle method_handle;
3556 if (thread->stack_overflow_state()->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
3557 method_handle = Handle(THREAD, JNIHandles::resolve(method));
3558 Handle receiver(THREAD, JNIHandles::resolve(obj));
3559 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3560 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
3561 jobject res = JNIHandles::make_local(THREAD, result);
3562 if (JvmtiExport::should_post_vm_object_alloc()) {
3563 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
3564 assert(ret_type != nullptr, "sanity check: ret_type oop must not be null!");
3565 if (java_lang_Class::is_primitive(ret_type)) {
3566 // Only for primitive type vm allocates memory for java object.
3567 // See box() method.
3568 JvmtiExport::post_vm_object_alloc(thread, result);
3569 }
3570 }
3571 return res;
3572 } else {
3573 THROW_0(vmSymbols::java_lang_StackOverflowError());
3574 }
3575 JVM_END
3576
3577
3578 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
3579 oop constructor_mirror = JNIHandles::resolve(c);
3580 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3581 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
3582 jobject res = JNIHandles::make_local(THREAD, result);
3583 if (JvmtiExport::should_post_vm_object_alloc()) {
3584 JvmtiExport::post_vm_object_alloc(thread, result);
3585 }
3586 return res;
3587 JVM_END
3588
3589 JVM_ENTRY(void, JVM_InitializeFromArchive(JNIEnv* env, jclass cls))
3590 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
3591 assert(k->is_klass(), "just checking");
3592 HeapShared::initialize_from_archived_subgraph(THREAD, k);
3593 JVM_END
3594
3595 JVM_ENTRY(void, JVM_RegisterLambdaProxyClassForArchiving(JNIEnv* env,
3596 jclass caller,
3597 jstring interfaceMethodName,
3598 jobject factoryType,
3599 jobject interfaceMethodType,
3600 jobject implementationMember,
3601 jobject dynamicMethodType,
3602 jclass lambdaProxyClass))
3603 #if INCLUDE_CDS
3604 if (!CDSConfig::is_dumping_archive()) {
3605 return;
3606 }
3607
3608 Klass* caller_k = java_lang_Class::as_Klass(JNIHandles::resolve(caller));
3609 InstanceKlass* caller_ik = InstanceKlass::cast(caller_k);
3610 if (caller_ik->is_hidden()) {
3611 // Hidden classes not of type lambda proxy classes are currently not being archived.
3612 // If the caller_ik is of one of the above types, the corresponding lambda proxy class won't be
3613 // registered for archiving.
3614 return;
3615 }
3623 interface_method_name = java_lang_String::as_symbol(JNIHandles::resolve_non_null(interfaceMethodName));
3624 }
3625 Handle factory_type_oop(THREAD, JNIHandles::resolve_non_null(factoryType));
3626 Symbol* factory_type = java_lang_invoke_MethodType::as_signature(factory_type_oop(), true);
3627
3628 Handle interface_method_type_oop(THREAD, JNIHandles::resolve_non_null(interfaceMethodType));
3629 Symbol* interface_method_type = java_lang_invoke_MethodType::as_signature(interface_method_type_oop(), true);
3630
3631 Handle implementation_member_oop(THREAD, JNIHandles::resolve_non_null(implementationMember));
3632 assert(java_lang_invoke_MemberName::is_method(implementation_member_oop()), "must be");
3633 Method* m = java_lang_invoke_MemberName::vmtarget(implementation_member_oop());
3634
3635 Handle dynamic_method_type_oop(THREAD, JNIHandles::resolve_non_null(dynamicMethodType));
3636 Symbol* dynamic_method_type = java_lang_invoke_MethodType::as_signature(dynamic_method_type_oop(), true);
3637
3638 SystemDictionaryShared::add_lambda_proxy_class(caller_ik, lambda_ik, interface_method_name, factory_type,
3639 interface_method_type, m, dynamic_method_type, THREAD);
3640 #endif // INCLUDE_CDS
3641 JVM_END
3642
3643 JVM_ENTRY(jclass, JVM_LookupLambdaProxyClassFromArchive(JNIEnv* env,
3644 jclass caller,
3645 jstring interfaceMethodName,
3646 jobject factoryType,
3647 jobject interfaceMethodType,
3648 jobject implementationMember,
3649 jobject dynamicMethodType))
3650 #if INCLUDE_CDS
3651
3652 if (interfaceMethodName == nullptr || factoryType == nullptr || interfaceMethodType == nullptr ||
3653 implementationMember == nullptr || dynamicMethodType == nullptr) {
3654 THROW_(vmSymbols::java_lang_NullPointerException(), nullptr);
3655 }
3656
3657 Klass* caller_k = java_lang_Class::as_Klass(JNIHandles::resolve(caller));
3658 InstanceKlass* caller_ik = InstanceKlass::cast(caller_k);
3659 if (!caller_ik->is_shared()) {
3660 // there won't be a shared lambda class if the caller_ik is not in the shared archive.
3661 return nullptr;
3662 }
3663
3671 Handle implementation_member_oop(THREAD, JNIHandles::resolve_non_null(implementationMember));
3672 assert(java_lang_invoke_MemberName::is_method(implementation_member_oop()), "must be");
3673 Method* m = java_lang_invoke_MemberName::vmtarget(implementation_member_oop());
3674
3675 Handle dynamic_method_type_oop(THREAD, JNIHandles::resolve_non_null(dynamicMethodType));
3676 Symbol* dynamic_method_type = java_lang_invoke_MethodType::as_signature(dynamic_method_type_oop(), true);
3677
3678 InstanceKlass* lambda_ik = SystemDictionaryShared::get_shared_lambda_proxy_class(caller_ik, interface_method_name, factory_type,
3679 interface_method_type, m, dynamic_method_type);
3680 jclass jcls = nullptr;
3681 if (lambda_ik != nullptr) {
3682 InstanceKlass* loaded_lambda = SystemDictionaryShared::prepare_shared_lambda_proxy_class(lambda_ik, caller_ik, THREAD);
3683 jcls = loaded_lambda == nullptr ? nullptr : (jclass) JNIHandles::make_local(THREAD, loaded_lambda->java_mirror());
3684 }
3685 return jcls;
3686 #else
3687 return nullptr;
3688 #endif // INCLUDE_CDS
3689 JVM_END
3690
3691 JVM_ENTRY_NO_ENV(jlong, JVM_GetRandomSeedForDumping())
3692 if (CDSConfig::is_dumping_static_archive()) {
3693 // We do this so that the default CDS archive can be deterministic.
3694 const char* release = VM_Version::vm_release();
3695 const char* dbg_level = VM_Version::jdk_debug_level();
3696 const char* version = VM_Version::internal_vm_info_string();
3697 jlong seed = (jlong)(java_lang_String::hash_code((const jbyte*)release, (int)strlen(release)) ^
3698 java_lang_String::hash_code((const jbyte*)dbg_level, (int)strlen(dbg_level)) ^
3699 java_lang_String::hash_code((const jbyte*)version, (int)strlen(version)));
3700 seed += (jlong)VM_Version::vm_major_version();
3701 seed += (jlong)VM_Version::vm_minor_version();
3702 seed += (jlong)VM_Version::vm_security_version();
3703 seed += (jlong)VM_Version::vm_patch_version();
3704 if (seed == 0) { // don't let this ever be zero.
3705 seed = 0x87654321;
3706 }
3707 log_debug(cds)("JVM_GetRandomSeedForDumping() = " JLONG_FORMAT, seed);
3708 return seed;
3709 } else {
3710 return 0;
3711 }
3712 JVM_END
3713
3714 JVM_ENTRY_NO_ENV(jint, JVM_GetCDSConfigStatus())
3715 return CDSConfig::get_status();
3716 JVM_END
3717
3718 JVM_ENTRY(void, JVM_LogLambdaFormInvoker(JNIEnv *env, jstring line))
3719 #if INCLUDE_CDS
3720 assert(CDSConfig::is_logging_lambda_form_invokers(), "sanity");
3721 if (line != nullptr) {
3722 ResourceMark rm(THREAD);
3723 Handle h_line (THREAD, JNIHandles::resolve_non_null(line));
3724 char* c_line = java_lang_String::as_utf8_string(h_line());
3725 if (CDSConfig::is_dumping_dynamic_archive()) {
3726 // Note: LambdaFormInvokers::append take same format which is not
3727 // same as below the print format. The line does not include LAMBDA_FORM_TAG.
3728 LambdaFormInvokers::append(os::strdup((const char*)c_line, mtInternal));
3729 }
3730 if (ClassListWriter::is_enabled()) {
3731 ClassListWriter w;
3732 w.stream()->print_cr("%s %s", LAMBDA_FORM_TAG, c_line);
3733 }
3734 }
3735 #endif // INCLUDE_CDS
3736 JVM_END
3737
3738 JVM_ENTRY(void, JVM_DumpClassListToFile(JNIEnv *env, jstring listFileName))
3739 #if INCLUDE_CDS
3740 ResourceMark rm(THREAD);
3741 Handle file_handle(THREAD, JNIHandles::resolve_non_null(listFileName));
3742 char* file_name = java_lang_String::as_utf8_string(file_handle());
3743 MetaspaceShared::dump_loaded_classes(file_name, THREAD);
3744 #endif // INCLUDE_CDS
3745 JVM_END
3746
3747 JVM_ENTRY(void, JVM_DumpDynamicArchive(JNIEnv *env, jstring archiveName))
3748 #if INCLUDE_CDS
3749 ResourceMark rm(THREAD);
3750 Handle file_handle(THREAD, JNIHandles::resolve_non_null(archiveName));
3751 char* archive_name = java_lang_String::as_utf8_string(file_handle());
3752 DynamicArchive::dump_for_jcmd(archive_name, CHECK);
3753 #endif // INCLUDE_CDS
3754 JVM_END
3755
3756 // Returns an array of all live Thread objects (VM internal JavaThreads,
3757 // jvmti agent threads, and JNI attaching threads are skipped)
3758 // See CR 6404306 regarding JNI attaching threads
3759 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
3760 ResourceMark rm(THREAD);
3761 ThreadsListEnumerator tle(THREAD, false, false);
3762 JvmtiVMObjectAllocEventCollector oam;
3763
3764 int num_threads = tle.num_threads();
3765 objArrayOop r = oopFactory::new_objArray(vmClasses::Thread_klass(), num_threads, CHECK_NULL);
3766 objArrayHandle threads_ah(THREAD, r);
3767
3768 for (int i = 0; i < num_threads; i++) {
3769 Handle h = tle.get_threadObj(i);
3770 threads_ah->obj_at_put(i, h());
3771 }
3772
3773 return (jobjectArray) JNIHandles::make_local(THREAD, threads_ah());
3774 JVM_END
3775
3776
3777 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
3778 // Return StackTraceElement[][], each element is the stack trace of a thread in
3779 // the corresponding entry in the given threads array
3780 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
3781 JvmtiVMObjectAllocEventCollector oam;
3782
3783 // Check if threads is null
3784 if (threads == nullptr) {
3785 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
3786 }
3787
3788 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
3789 objArrayHandle ah(THREAD, a);
3790 int num_threads = ah->length();
3791 // check if threads is non-empty array
3792 if (num_threads == 0) {
3793 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
3794 }
3795
3796 // check if threads is not an array of objects of Thread class
3797 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
3798 if (k != vmClasses::Thread_klass()) {
3799 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
3800 }
3801
3802 ResourceMark rm(THREAD);
3803
3804 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
3805 for (int i = 0; i < num_threads; i++) {
3806 oop thread_obj = ah->obj_at(i);
3807 instanceHandle h(THREAD, (instanceOop) thread_obj);
3808 thread_handle_array->append(h);
3809 }
3810
3811 // The JavaThread references in thread_handle_array are validated
3812 // in VM_ThreadDump::doit().
3813 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
3814 return (jobjectArray)JNIHandles::make_local(THREAD, stacktraces());
3815
3816 JVM_END
3817
3818 // JVM monitoring and management support
3819 JVM_LEAF(void*, JVM_GetManagement(jint version))
3820 return Management::get_jmm_interface(version);
3821 JVM_END
3822
3823 // com.sun.tools.attach.VirtualMachine agent properties support
3824 //
3825 // Initialize the agent properties with the properties maintained in the VM
3826 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
3827 ResourceMark rm;
3828
3829 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
3830
3831 PUTPROP(props, "sun.java.command", Arguments::java_command());
3832 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
3833 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
3834 return properties;
3835 JVM_END
3836
3837 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
3838 {
3839 JvmtiVMObjectAllocEventCollector oam;
3840
3841 if (ofClass == nullptr) {
3842 return nullptr;
3843 }
3844 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
3845 // Special handling for primitive objects
3846 if (java_lang_Class::is_primitive(mirror())) {
3847 return nullptr;
3848 }
3849 Klass* k = java_lang_Class::as_Klass(mirror());
3850 if (!k->is_instance_klass()) {
3851 return nullptr;
3852 }
3853 InstanceKlass* ik = InstanceKlass::cast(k);
3854 int encl_method_class_idx = ik->enclosing_method_class_index();
3855 if (encl_method_class_idx == 0) {
3856 return nullptr;
3857 }
3860 Klass* enc_k = ik->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
3861 dest->obj_at_put(0, enc_k->java_mirror());
3862 int encl_method_method_idx = ik->enclosing_method_method_index();
3863 if (encl_method_method_idx != 0) {
3864 Symbol* sym = ik->constants()->symbol_at(
3865 extract_low_short_from_int(
3866 ik->constants()->name_and_type_at(encl_method_method_idx)));
3867 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3868 dest->obj_at_put(1, str());
3869 sym = ik->constants()->symbol_at(
3870 extract_high_short_from_int(
3871 ik->constants()->name_and_type_at(encl_method_method_idx)));
3872 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3873 dest->obj_at_put(2, str());
3874 }
3875 return (jobjectArray) JNIHandles::make_local(THREAD, dest());
3876 }
3877 JVM_END
3878
3879 // Returns an array of java.lang.String objects containing the input arguments to the VM.
3880 JVM_ENTRY(jobjectArray, JVM_GetVmArguments(JNIEnv *env))
3881 ResourceMark rm(THREAD);
3882
3883 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) {
3884 return nullptr;
3885 }
3886
3887 char** vm_flags = Arguments::jvm_flags_array();
3888 char** vm_args = Arguments::jvm_args_array();
3889 int num_flags = Arguments::num_jvm_flags();
3890 int num_args = Arguments::num_jvm_args();
3891
3892 InstanceKlass* ik = vmClasses::String_klass();
3893 objArrayOop r = oopFactory::new_objArray(ik, num_args + num_flags, CHECK_NULL);
3894 objArrayHandle result_h(THREAD, r);
3895
3896 int index = 0;
3897 for (int j = 0; j < num_flags; j++, index++) {
3898 Handle h = java_lang_String::create_from_platform_dependent_str(vm_flags[j], CHECK_NULL);
3899 result_h->obj_at_put(index, h());
3900 }
3901 for (int i = 0; i < num_args; i++, index++) {
3902 Handle h = java_lang_String::create_from_platform_dependent_str(vm_args[i], CHECK_NULL);
3903 result_h->obj_at_put(index, h());
3904 }
3905 return (jobjectArray) JNIHandles::make_local(THREAD, result_h());
3906 JVM_END
3907
3908 JVM_LEAF(jint, JVM_FindSignal(const char *name))
3909 return os::get_signal_number(name);
3910 JVM_END
3911
3912 JVM_ENTRY(void, JVM_VirtualThreadStart(JNIEnv* env, jobject vthread))
3913 #if INCLUDE_JVMTI
3914 if (!DoJVMTIVirtualThreadTransitions) {
3915 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
3916 return;
3917 }
3918 if (JvmtiVTMSTransitionDisabler::VTMS_notify_jvmti_events()) {
3919 JvmtiVTMSTransitionDisabler::VTMS_vthread_start(vthread);
3920 } else {
3921 // set VTMS transition bit value in JavaThread and java.lang.VirtualThread object
3922 JvmtiVTMSTransitionDisabler::set_is_in_VTMS_transition(thread, vthread, false);
3923 }
3924 #endif
3925 JVM_END
3926
3927 JVM_ENTRY(void, JVM_VirtualThreadEnd(JNIEnv* env, jobject vthread))
3928 #if INCLUDE_JVMTI
3929 if (!DoJVMTIVirtualThreadTransitions) {
3930 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
3931 return;
3932 }
3933 if (JvmtiVTMSTransitionDisabler::VTMS_notify_jvmti_events()) {
3934 JvmtiVTMSTransitionDisabler::VTMS_vthread_end(vthread);
3935 } else {
3936 // set VTMS transition bit value in JavaThread and java.lang.VirtualThread object
3937 JvmtiVTMSTransitionDisabler::set_is_in_VTMS_transition(thread, vthread, true);
3938 }
3939 #endif
3940 JVM_END
3941
3942 // If notifications are disabled then just update the VTMS transition bit and return.
3943 // Otherwise, the bit is updated in the given jvmtiVTMSTransitionDisabler function call.
3944 JVM_ENTRY(void, JVM_VirtualThreadMount(JNIEnv* env, jobject vthread, jboolean hide))
3945 #if INCLUDE_JVMTI
3946 if (!DoJVMTIVirtualThreadTransitions) {
3947 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
3948 return;
3949 }
3950 if (JvmtiVTMSTransitionDisabler::VTMS_notify_jvmti_events()) {
3951 JvmtiVTMSTransitionDisabler::VTMS_vthread_mount(vthread, hide);
3952 } else {
3953 // set VTMS transition bit value in JavaThread and java.lang.VirtualThread object
3954 JvmtiVTMSTransitionDisabler::set_is_in_VTMS_transition(thread, vthread, hide);
3955 }
3956 #endif
3957 JVM_END
3958
3959 // If notifications are disabled then just update the VTMS transition bit and return.
3960 // Otherwise, the bit is updated in the given jvmtiVTMSTransitionDisabler function call below.
3961 JVM_ENTRY(void, JVM_VirtualThreadUnmount(JNIEnv* env, jobject vthread, jboolean hide))
3962 #if INCLUDE_JVMTI
3963 if (!DoJVMTIVirtualThreadTransitions) {
3964 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
3965 return;
3966 }
3967 if (JvmtiVTMSTransitionDisabler::VTMS_notify_jvmti_events()) {
3968 JvmtiVTMSTransitionDisabler::VTMS_vthread_unmount(vthread, hide);
3969 } else {
3970 // set VTMS transition bit value in JavaThread and java.lang.VirtualThread object
3971 JvmtiVTMSTransitionDisabler::set_is_in_VTMS_transition(thread, vthread, hide);
3972 }
3973 #endif
3974 JVM_END
3975
3976 // Always update the temporary VTMS transition bit.
3977 JVM_ENTRY(void, JVM_VirtualThreadHideFrames(JNIEnv* env, jclass clazz, jboolean hide))
3978 #if INCLUDE_JVMTI
3979 if (!DoJVMTIVirtualThreadTransitions) {
3980 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
3981 return;
3982 }
3983 assert(!thread->is_in_VTMS_transition(), "sanity check");
3984 assert(thread->is_in_tmp_VTMS_transition() != (bool)hide, "sanity check");
3985 thread->toggle_is_in_tmp_VTMS_transition();
3986 #endif
3987 JVM_END
3988
3989 // Notification from VirtualThread about disabling JVMTI Suspend in a sync critical section.
3990 // Needed to avoid deadlocks with JVMTI suspend mechanism.
3991 JVM_ENTRY(void, JVM_VirtualThreadDisableSuspend(JNIEnv* env, jclass clazz, jboolean enter))
3992 #if INCLUDE_JVMTI
3993 if (!DoJVMTIVirtualThreadTransitions) {
3994 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
3995 return;
3996 }
3997 assert(thread->is_disable_suspend() != (bool)enter,
3998 "nested or unbalanced monitor enter/exit is not allowed");
3999 thread->toggle_is_disable_suspend();
4000 #endif
4001 JVM_END
4002
4003 /*
4004 * Return the current class's class file version. The low order 16 bits of the
4005 * returned jint contain the class's major version. The high order 16 bits
4006 * contain the class's minor version.
4007 */
4008 JVM_ENTRY(jint, JVM_GetClassFileVersion(JNIEnv* env, jclass current))
4009 oop mirror = JNIHandles::resolve_non_null(current);
4010 if (java_lang_Class::is_primitive(mirror)) {
4011 // return latest major version and minor version of 0.
4012 return JVM_CLASSFILE_MAJOR_VERSION;
4013 }
4014 assert(!java_lang_Class::as_Klass(mirror)->is_array_klass(), "unexpected array class");
4015
4016 Klass* c = java_lang_Class::as_Klass(mirror);
4017 assert(c->is_instance_klass(), "must be");
4018 InstanceKlass* ik = InstanceKlass::cast(c);
4019 return (ik->minor_version() << 16) | ik->major_version();
4020 JVM_END
4021
4022 /*
4023 * Ensure that code doing a stackwalk and using javaVFrame::locals() to
4024 * get the value will see a materialized value and not a scalar-replaced
4025 * null value.
4026 */
4027 JVM_ENTRY(void, JVM_EnsureMaterializedForStackWalk_func(JNIEnv* env, jobject vthread, jobject value))
4028 JVM_EnsureMaterializedForStackWalk(env, value);
4029 JVM_END
4030
4031 /*
4032 * Return JNI_TRUE if warnings are printed when agents are dynamically loaded.
4033 */
4034 JVM_LEAF(jboolean, JVM_PrintWarningAtDynamicAgentLoad(void))
4035 return (EnableDynamicAgentLoading && !FLAG_IS_CMDLINE(EnableDynamicAgentLoading)) ? JNI_TRUE : JNI_FALSE;
4036 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"
224 if (source_file != nullptr) {
225 log_debug(class, resolve)("%s %s %s:%d (%s)", from, to, source_file, line_number, trace);
226 } else {
227 log_debug(class, resolve)("%s %s (%s)", from, to, trace);
228 }
229 }
230 }
231 }
232
233 void trace_class_resolution(Klass* to_class) {
234 EXCEPTION_MARK;
235 trace_class_resolution_impl(to_class, THREAD);
236 if (HAS_PENDING_EXCEPTION) {
237 CLEAR_PENDING_EXCEPTION;
238 }
239 }
240
241 // java.lang.System //////////////////////////////////////////////////////////////////////
242
243
244 JVM_LEAF_PROF(jlong, JVM_CurrentTimeMillis, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
245 return os::javaTimeMillis();
246 JVM_END
247
248 JVM_LEAF_PROF(jlong, JVM_NanoTime, JVM_NanoTime(JNIEnv *env, jclass ignored))
249 return os::javaTimeNanos();
250 JVM_END
251
252 // The function below is actually exposed by jdk.internal.misc.VM and not
253 // java.lang.System, but we choose to keep it here so that it stays next
254 // to JVM_CurrentTimeMillis and JVM_NanoTime
255
256 const jlong MAX_DIFF_SECS = CONST64(0x0100000000); // 2^32
257 const jlong MIN_DIFF_SECS = -MAX_DIFF_SECS; // -2^32
258
259 JVM_LEAF_PROF(jlong, JVM_GetNanoTimeAdjustment, JVM_GetNanoTimeAdjustment(JNIEnv *env, jclass ignored, jlong offset_secs))
260 jlong seconds;
261 jlong nanos;
262
263 os::javaTimeSystemUTC(seconds, nanos);
264
265 // We're going to verify that the result can fit in a long.
266 // For that we need the difference in seconds between 'seconds'
267 // and 'offset_secs' to be such that:
268 // |seconds - offset_secs| < (2^63/10^9)
269 // We're going to approximate 10^9 ~< 2^30 (1000^3 ~< 1024^3)
270 // which makes |seconds - offset_secs| < 2^33
271 // and we will prefer +/- 2^32 as the maximum acceptable diff
272 // as 2^32 has a more natural feel than 2^33...
273 //
274 // So if |seconds - offset_secs| >= 2^32 - we return a special
275 // sentinel value (-1) which the caller should take as an
276 // exception value indicating that the offset given to us is
277 // too far from range of the current time - leading to too big
278 // a nano adjustment. The caller is expected to recover by
279 // computing a more accurate offset and calling this method
280 // again. (For the record 2^32 secs is ~136 years, so that
281 // should rarely happen)
282 //
283 jlong diff = seconds - offset_secs;
284 if (diff >= MAX_DIFF_SECS || diff <= MIN_DIFF_SECS) {
285 return -1; // sentinel value: the offset is too far off the target
286 }
287
288 // return the adjustment. If you compute a time by adding
289 // this number of nanoseconds along with the number of seconds
290 // in the offset you should get the current UTC time.
291 return (diff * (jlong)1000000000) + nanos;
292 JVM_END
293
294 JVM_ENTRY_PROF(void, JVM_ArrayCopy, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
295 jobject dst, jint dst_pos, jint length))
296 // Check if we have null pointers
297 if (src == nullptr || dst == nullptr) {
298 THROW(vmSymbols::java_lang_NullPointerException());
299 }
300 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
301 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
302 assert(oopDesc::is_oop(s), "JVM_ArrayCopy: src not an oop");
303 assert(oopDesc::is_oop(d), "JVM_ArrayCopy: dst not an oop");
304 // Do copy
305 s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread);
306 JVM_END
307
308
309 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
310 JavaValue r(T_OBJECT);
311 // public synchronized Object put(Object key, Object value);
312 HandleMark hm(THREAD);
313 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK);
314 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != nullptr ? value : ""), CHECK);
315 JavaCalls::call_virtual(&r,
316 props,
317 vmClasses::Properties_klass(),
318 vmSymbols::put_name(),
319 vmSymbols::object_object_object_signature(),
320 key_str,
321 value_str,
322 THREAD);
323 }
324
325
326 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
327
328 /*
329 * Return all of the system properties in a Java String array with alternating
330 * names and values from the jvm SystemProperty.
331 * Which includes some internal and all commandline -D defined properties.
332 */
333 JVM_ENTRY_PROF(jobjectArray, JVM_GetProperties, JVM_GetProperties(JNIEnv *env))
334 ResourceMark rm(THREAD);
335 HandleMark hm(THREAD);
336 int ndx = 0;
337 int fixedCount = 2;
338
339 SystemProperty* p = Arguments::system_properties();
340 int count = Arguments::PropertyList_count(p);
341
342 // Allocate result String array
343 InstanceKlass* ik = vmClasses::String_klass();
344 objArrayOop r = oopFactory::new_objArray(ik, (count + fixedCount) * 2, CHECK_NULL);
345 objArrayHandle result_h(THREAD, r);
346
347 while (p != nullptr) {
348 const char * key = p->key();
349 if (strcmp(key, "sun.nio.MaxDirectMemorySize") != 0) {
350 const char * value = p->value();
351 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK_NULL);
352 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != nullptr ? value : ""), CHECK_NULL);
353 result_h->obj_at_put(ndx * 2, key_str());
401 Handle key_str = java_lang_String::create_from_platform_dependent_str("sun.management.compiler", CHECK_NULL);
402 Handle value_str = java_lang_String::create_from_platform_dependent_str(compiler_name, CHECK_NULL);
403 result_h->obj_at_put(ndx * 2, key_str());
404 result_h->obj_at_put(ndx * 2 + 1, value_str());
405 ndx++;
406 }
407 }
408
409 return (jobjectArray) JNIHandles::make_local(THREAD, result_h());
410 JVM_END
411
412
413 /*
414 * Return the temporary directory that the VM uses for the attach
415 * and perf data files.
416 *
417 * It is important that this directory is well-known and the
418 * same for all VM instances. It cannot be affected by configuration
419 * variables such as java.io.tmpdir.
420 */
421 JVM_ENTRY_PROF(jstring, JVM_GetTemporaryDirectory, JVM_GetTemporaryDirectory(JNIEnv *env))
422 HandleMark hm(THREAD);
423 const char* temp_dir = os::get_temp_directory();
424 Handle h = java_lang_String::create_from_platform_dependent_str(temp_dir, CHECK_NULL);
425 return (jstring) JNIHandles::make_local(THREAD, h());
426 JVM_END
427
428
429 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
430
431 extern volatile jint vm_created;
432
433 JVM_ENTRY_NO_ENV_PROF(void, JVM_BeforeHalt, JVM_BeforeHalt())
434 EventShutdown event;
435 if (event.should_commit()) {
436 event.set_reason("Shutdown requested from Java");
437 event.commit();
438 }
439 JVM_END
440
441
442 JVM_ENTRY_NO_ENV_PROF(void, JVM_Halt, JVM_Halt(jint code))
443 before_exit(thread, true);
444 vm_exit(code);
445 JVM_END
446
447
448 JVM_ENTRY_NO_ENV_PROF(void, JVM_GC, JVM_GC(void))
449 if (!DisableExplicitGC) {
450 EventSystemGC event;
451 event.set_invokedConcurrent(ExplicitGCInvokesConcurrent);
452 Universe::heap()->collect(GCCause::_java_lang_system_gc);
453 event.commit();
454 }
455 JVM_END
456
457
458 JVM_LEAF_PROF(jlong, JVM_MaxObjectInspectionAge, JVM_MaxObjectInspectionAge(void))
459 return Universe::heap()->millis_since_last_whole_heap_examined();
460 JVM_END
461
462
463 static inline jlong convert_size_t_to_jlong(size_t val) {
464 // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
465 NOT_LP64 (return (jlong)val;)
466 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
467 }
468
469 JVM_ENTRY_NO_ENV_PROF(jlong, JVM_TotalMemory, JVM_TotalMemory(void))
470 size_t n = Universe::heap()->capacity();
471 return convert_size_t_to_jlong(n);
472 JVM_END
473
474
475 JVM_ENTRY_NO_ENV_PROF(jlong, JVM_FreeMemory, JVM_FreeMemory(void))
476 size_t n = Universe::heap()->unused();
477 return convert_size_t_to_jlong(n);
478 JVM_END
479
480
481 JVM_ENTRY_NO_ENV_PROF(jlong, JVM_MaxMemory, JVM_MaxMemory(void))
482 size_t n = Universe::heap()->max_capacity();
483 return convert_size_t_to_jlong(n);
484 JVM_END
485
486
487 JVM_ENTRY_NO_ENV_PROF(jint, JVM_ActiveProcessorCount, JVM_ActiveProcessorCount(void))
488 return os::active_processor_count();
489 JVM_END
490
491 JVM_LEAF_PROF(jboolean, JVM_IsUseContainerSupport, JVM_IsUseContainerSupport(void))
492 #ifdef LINUX
493 if (UseContainerSupport) {
494 return JNI_TRUE;
495 }
496 #endif
497 return JNI_FALSE;
498 JVM_END
499
500 // java.lang.Throwable //////////////////////////////////////////////////////
501
502 JVM_ENTRY_PROF(void, JVM_FillInStackTrace, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
503 Handle exception(thread, JNIHandles::resolve_non_null(receiver));
504 java_lang_Throwable::fill_in_stack_trace(exception);
505 JVM_END
506
507 // java.lang.NullPointerException ///////////////////////////////////////////
508
509 JVM_ENTRY_PROF(jstring, JVM_GetExtendedNPEMessage, JVM_GetExtendedNPEMessage(JNIEnv *env, jthrowable throwable))
510 if (!ShowCodeDetailsInExceptionMessages) return nullptr;
511
512 oop exc = JNIHandles::resolve_non_null(throwable);
513
514 Method* method;
515 int bci;
516 if (!java_lang_Throwable::get_top_method_and_bci(exc, &method, &bci)) {
517 return nullptr;
518 }
519 if (method->is_native()) {
520 return nullptr;
521 }
522
523 stringStream ss;
524 bool ok = BytecodeUtils::get_NPE_message_at(&ss, method, bci);
525 if (ok) {
526 oop result = java_lang_String::create_oop_from_str(ss.base(), CHECK_NULL);
527 return (jstring) JNIHandles::make_local(THREAD, result);
528 } else {
529 return nullptr;
530 }
531 JVM_END
532
533 // java.lang.StackTraceElement //////////////////////////////////////////////
534
535
536 JVM_ENTRY_PROF(void, JVM_InitStackTraceElementArray, JVM_InitStackTraceElementArray(JNIEnv *env, jobjectArray elements, jobject backtrace, jint depth))
537 Handle backtraceh(THREAD, JNIHandles::resolve(backtrace));
538 objArrayOop st = objArrayOop(JNIHandles::resolve(elements));
539 objArrayHandle stack_trace(THREAD, st);
540 // Fill in the allocated stack trace
541 java_lang_Throwable::get_stack_trace_elements(depth, backtraceh, stack_trace, CHECK);
542 JVM_END
543
544
545 JVM_ENTRY_PROF(void, JVM_InitStackTraceElement, JVM_InitStackTraceElement(JNIEnv* env, jobject element, jobject stackFrameInfo))
546 Handle stack_frame_info(THREAD, JNIHandles::resolve_non_null(stackFrameInfo));
547 Handle stack_trace_element(THREAD, JNIHandles::resolve_non_null(element));
548 java_lang_StackFrameInfo::to_stack_trace_element(stack_frame_info, stack_trace_element, CHECK);
549 JVM_END
550
551
552 // java.lang.StackWalker //////////////////////////////////////////////////////
553 JVM_ENTRY_PROF(void, JVM_ExpandStackFrameInfo, JVM_ExpandStackFrameInfo(JNIEnv *env, jobject obj))
554 Handle stack_frame_info(THREAD, JNIHandles::resolve_non_null(obj));
555
556 bool have_name = (java_lang_StackFrameInfo::name(stack_frame_info()) != nullptr);
557 bool have_type = (java_lang_StackFrameInfo::type(stack_frame_info()) != nullptr);
558 Method* method = java_lang_StackFrameInfo::get_method(stack_frame_info());
559 if (!have_name) {
560 oop name = StringTable::intern(method->name(), CHECK);
561 java_lang_StackFrameInfo::set_name(stack_frame_info(), name);
562 }
563 if (!have_type) {
564 Handle type = java_lang_String::create_from_symbol(method->signature(), CHECK);
565 java_lang_StackFrameInfo::set_type(stack_frame_info(), type());
566 }
567 JVM_END
568
569 JVM_ENTRY_PROF(jobject, JVM_CallStackWalk, JVM_CallStackWalk(JNIEnv *env, jobject stackStream, jint mode,
570 jint skip_frames, jobject contScope, jobject cont,
571 jint buffer_size, jint start_index, jobjectArray frames))
572 if (!thread->has_last_Java_frame()) {
573 THROW_MSG_(vmSymbols::java_lang_InternalError(), "doStackWalk: no stack trace", nullptr);
574 }
575
576 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
577 Handle contScope_h(THREAD, JNIHandles::resolve(contScope));
578 Handle cont_h(THREAD, JNIHandles::resolve(cont));
579 // frames array is a ClassFrameInfo[] array when only getting caller reference,
580 // and a StackFrameInfo[] array (or derivative) otherwise. It should never
581 // be null.
582 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
583 objArrayHandle frames_array_h(THREAD, fa);
584
585 if (frames_array_h->length() < buffer_size) {
586 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers", nullptr);
587 }
588
589 oop result = StackWalk::walk(stackStream_h, mode, skip_frames, contScope_h, cont_h,
590 buffer_size, start_index, frames_array_h, CHECK_NULL);
591 return JNIHandles::make_local(THREAD, result);
592 JVM_END
593
594
595 JVM_ENTRY_PROF(jint, JVM_MoreStackWalk, JVM_MoreStackWalk(JNIEnv *env, jobject stackStream, jint mode, jlong anchor,
596 jint last_batch_count, jint buffer_size, jint start_index,
597 jobjectArray frames))
598 // frames array is a ClassFrameInfo[] array when only getting caller reference,
599 // and a StackFrameInfo[] array (or derivative) otherwise. It should never
600 // be null.
601 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
602 objArrayHandle frames_array_h(THREAD, fa);
603
604 if (frames_array_h->length() < buffer_size) {
605 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers");
606 }
607
608 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
609 return StackWalk::fetchNextBatch(stackStream_h, mode, anchor, last_batch_count, buffer_size,
610 start_index, frames_array_h, THREAD);
611 JVM_END
612
613 JVM_ENTRY_PROF(void, JVM_SetStackWalkContinuation, JVM_SetStackWalkContinuation(JNIEnv *env, jobject stackStream, jlong anchor, jobjectArray frames, jobject cont))
614 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
615 objArrayHandle frames_array_h(THREAD, fa);
616 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
617 Handle cont_h(THREAD, JNIHandles::resolve_non_null(cont));
618
619 StackWalk::setContinuation(stackStream_h, anchor, frames_array_h, cont_h, THREAD);
620 JVM_END
621
622 // java.lang.Object ///////////////////////////////////////////////
623
624
625 JVM_ENTRY_PROF(jint, JVM_IHashCode, JVM_IHashCode(JNIEnv* env, jobject handle))
626 // as implemented in the classic virtual machine; return 0 if object is null
627 return handle == nullptr ? 0 :
628 checked_cast<jint>(ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)));
629 JVM_END
630
631
632 JVM_ENTRY_PROF(void, JVM_MonitorWait, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
633 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
634 JavaThreadInObjectWaitState jtiows(thread, ms != 0);
635 if (JvmtiExport::should_post_monitor_wait()) {
636 JvmtiExport::post_monitor_wait(thread, obj(), ms);
637
638 // The current thread already owns the monitor and it has not yet
639 // been added to the wait queue so the current thread cannot be
640 // made the successor. This means that the JVMTI_EVENT_MONITOR_WAIT
641 // event handler cannot accidentally consume an unpark() meant for
642 // the ParkEvent associated with this ObjectMonitor.
643 }
644 ObjectSynchronizer::wait(obj, ms, CHECK);
645 JVM_END
646
647
648 JVM_ENTRY_PROF(void, JVM_MonitorNotify, JVM_MonitorNotify(JNIEnv* env, jobject handle))
649 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
650 ObjectSynchronizer::notify(obj, CHECK);
651 JVM_END
652
653
654 JVM_ENTRY_PROF(void, JVM_MonitorNotifyAll, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
655 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
656 ObjectSynchronizer::notifyall(obj, CHECK);
657 JVM_END
658
659
660 JVM_ENTRY_PROF(jobject, JVM_Clone, JVM_Clone(JNIEnv* env, jobject handle))
661 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
662 Klass* klass = obj->klass();
663 JvmtiVMObjectAllocEventCollector oam;
664
665 #ifdef ASSERT
666 // Just checking that the cloneable flag is set correct
667 if (obj->is_array()) {
668 guarantee(klass->is_cloneable(), "all arrays are cloneable");
669 } else {
670 guarantee(obj->is_instance(), "should be instanceOop");
671 bool cloneable = klass->is_subtype_of(vmClasses::Cloneable_klass());
672 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
673 }
674 #endif
675
676 // Check if class of obj supports the Cloneable interface.
677 // All arrays are considered to be cloneable (See JLS 20.1.5).
678 // All j.l.r.Reference classes are considered non-cloneable.
679 if (!klass->is_cloneable() ||
680 (klass->is_instance_klass() &&
693 } else {
694 new_obj_oop = Universe::heap()->obj_allocate(klass, size, CHECK_NULL);
695 }
696
697 HeapAccess<>::clone(obj(), new_obj_oop, size);
698
699 Handle new_obj(THREAD, new_obj_oop);
700 // Caution: this involves a java upcall, so the clone should be
701 // "gc-robust" by this stage.
702 if (klass->has_finalizer()) {
703 assert(obj->is_instance(), "should be instanceOop");
704 new_obj_oop = InstanceKlass::register_finalizer(instanceOop(new_obj()), CHECK_NULL);
705 new_obj = Handle(THREAD, new_obj_oop);
706 }
707
708 return JNIHandles::make_local(THREAD, new_obj());
709 JVM_END
710
711 // java.lang.ref.Finalizer ////////////////////////////////////////////////////
712
713 JVM_ENTRY_PROF(void, JVM_ReportFinalizationComplete, JVM_ReportFinalizationComplete(JNIEnv * env, jobject finalizee))
714 MANAGEMENT_ONLY(FinalizerService::on_complete(JNIHandles::resolve_non_null(finalizee), THREAD);)
715 JVM_END
716
717 JVM_LEAF_PROF(jboolean, JVM_IsFinalizationEnabled, JVM_IsFinalizationEnabled(JNIEnv * env))
718 return InstanceKlass::is_finalization_enabled();
719 JVM_END
720
721 // jdk.internal.vm.Continuation /////////////////////////////////////////////////////
722
723 JVM_ENTRY_PROF(void, JVM_RegisterContinuationMethods, JVM_RegisterContinuationMethods(JNIEnv *env, jclass cls))
724 CONT_RegisterNativeMethods(env, cls);
725 JVM_END
726
727 // java.io.File ///////////////////////////////////////////////////////////////
728
729 JVM_LEAF_PROF(char*, JVM_NativePath, JVM_NativePath(char* path))
730 return os::native_path(path);
731 JVM_END
732
733
734 // Misc. class handling ///////////////////////////////////////////////////////////
735
736
737 JVM_ENTRY_PROF(jclass, JVM_GetCallerClass, JVM_GetCallerClass(JNIEnv* env))
738 // Getting the class of the caller frame.
739 //
740 // The call stack at this point looks something like this:
741 //
742 // [0] [ @CallerSensitive public jdk.internal.reflect.Reflection.getCallerClass ]
743 // [1] [ @CallerSensitive API.method ]
744 // [.] [ (skipped intermediate frames) ]
745 // [n] [ caller ]
746 vframeStream vfst(thread);
747 // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass
748 for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) {
749 Method* m = vfst.method();
750 assert(m != nullptr, "sanity");
751 switch (n) {
752 case 0:
753 // This must only be called from Reflection.getCallerClass
754 if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) {
755 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass");
756 }
757 // fall-through
758 case 1:
759 // Frame 0 and 1 must be caller sensitive.
760 if (!m->caller_sensitive()) {
761 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n));
762 }
763 break;
764 default:
765 if (!m->is_ignored_by_security_stack_walk()) {
766 // We have reached the desired frame; return the holder class.
767 return (jclass) JNIHandles::make_local(THREAD, m->method_holder()->java_mirror());
768 }
769 break;
770 }
771 }
772 return nullptr;
773 JVM_END
774
775
776 JVM_ENTRY_PROF(jclass, JVM_FindPrimitiveClass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
777 oop mirror = nullptr;
778 BasicType t = name2type(utf);
779 if (t != T_ILLEGAL && !is_reference_type(t)) {
780 mirror = Universe::java_mirror(t);
781 }
782 if (mirror == nullptr) {
783 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
784 } else {
785 return (jclass) JNIHandles::make_local(THREAD, mirror);
786 }
787 JVM_END
788
789
790 // Returns a class loaded by the bootstrap class loader; or null
791 // if not found. ClassNotFoundException is not thrown.
792 // FindClassFromBootLoader is exported to the launcher for windows.
793 JVM_ENTRY_PROF(jclass, JVM_FindClassFromBootLoader, JVM_FindClassFromBootLoader(JNIEnv* env, const char* name))
794 // Java libraries should ensure that name is never null or illegal.
795 if (name == nullptr || (int)strlen(name) > Symbol::max_length()) {
796 // It's impossible to create this class; the name cannot fit
797 // into the constant pool.
798 return nullptr;
799 }
800 assert(UTF8::is_legal_utf8((const unsigned char*)name, (int)strlen(name), false), "illegal UTF name");
801
802 TempNewSymbol h_name = SymbolTable::new_symbol(name);
803 Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
804 if (k == nullptr) {
805 return nullptr;
806 }
807
808 if (log_is_enabled(Debug, class, resolve)) {
809 trace_class_resolution(k);
810 }
811 return (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
812 JVM_END
813
814 // Find a class with this name in this loader, using the caller's protection domain.
815 JVM_ENTRY_PROF(jclass, JVM_FindClassFromCaller, JVM_FindClassFromCaller(JNIEnv* env, const char* name,
816 jboolean init, jobject loader,
817 jclass caller))
818 TempNewSymbol h_name =
819 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_ClassNotFoundException(),
820 CHECK_NULL);
821
822 oop loader_oop = JNIHandles::resolve(loader);
823 oop from_class = JNIHandles::resolve(caller);
824 oop protection_domain = nullptr;
825 // If loader is null, shouldn't call ClassLoader.checkPackageAccess; otherwise get
826 // NPE. Put it in another way, the bootstrap class loader has all permission and
827 // thus no checkPackageAccess equivalence in the VM class loader.
828 // The caller is also passed as null by the java code if there is no security
829 // manager to avoid the performance cost of getting the calling class.
830 if (from_class != nullptr && loader_oop != nullptr) {
831 protection_domain = java_lang_Class::as_Klass(from_class)->protection_domain();
832 }
833
834 Handle h_loader(THREAD, loader_oop);
835 Handle h_prot(THREAD, protection_domain);
836 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
837 h_prot, false, THREAD);
838
839 if (log_is_enabled(Debug, class, resolve) && result != nullptr) {
840 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
841 }
842 return result;
843 JVM_END
844
845 // Currently only called from the old verifier.
846 JVM_ENTRY_PROF(jclass, JVM_FindClassFromClass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
847 jboolean init, jclass from))
848 TempNewSymbol h_name =
849 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_ClassNotFoundException(),
850 CHECK_NULL);
851 oop from_class_oop = JNIHandles::resolve(from);
852 Klass* from_class = (from_class_oop == nullptr)
853 ? (Klass*)nullptr
854 : java_lang_Class::as_Klass(from_class_oop);
855 oop class_loader = nullptr;
856 oop protection_domain = nullptr;
857 if (from_class != nullptr) {
858 class_loader = from_class->class_loader();
859 protection_domain = from_class->protection_domain();
860 }
861 Handle h_loader(THREAD, class_loader);
862 Handle h_prot (THREAD, protection_domain);
863 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
864 h_prot, true, thread);
865
866 if (log_is_enabled(Debug, class, resolve) && result != nullptr) {
867 // this function is generally only used for class loading during verification.
1030 ik->external_name(),
1031 host_class->external_name(),
1032 ik->is_hidden() ? "is hidden" : "is not hidden");
1033 }
1034 }
1035
1036 if ((!is_hidden || is_nestmate) && !Reflection::is_same_class_package(lookup_k, ik)) {
1037 // non-hidden class or nestmate class must be in the same package as the Lookup class
1038 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Lookup class and defined class are in different packages");
1039 }
1040
1041 if (init) {
1042 ik->initialize(CHECK_NULL);
1043 } else {
1044 ik->link_class(CHECK_NULL);
1045 }
1046
1047 return (jclass) JNIHandles::make_local(THREAD, ik->java_mirror());
1048 }
1049
1050 JVM_ENTRY_PROF(jclass, JVM_DefineClass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
1051 return jvm_define_class_common(name, loader, buf, len, pd, nullptr, THREAD);
1052 JVM_END
1053
1054 /*
1055 * Define a class with the specified lookup class.
1056 * lookup: Lookup class
1057 * name: the name of the class
1058 * buf: class bytes
1059 * len: length of class bytes
1060 * pd: protection domain
1061 * init: initialize the class
1062 * flags: properties of the class
1063 * classData: private static pre-initialized field
1064 */
1065 JVM_ENTRY_PROF(jclass, JVM_LookupDefineClass, JVM_LookupDefineClass(JNIEnv *env, jclass lookup, const char *name, const jbyte *buf,
1066 jsize len, jobject pd, jboolean initialize, int flags, jobject classData))
1067
1068 if (lookup == nullptr) {
1069 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Lookup class is null");
1070 }
1071
1072 assert(buf != nullptr, "buf must not be null");
1073
1074 return jvm_lookup_define_class(lookup, name, buf, len, pd, initialize, flags, classData, THREAD);
1075 JVM_END
1076
1077 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))
1078 return jvm_define_class_common(name, loader, buf, len, pd, source, THREAD);
1079 JVM_END
1080
1081 JVM_ENTRY_PROF(jclass, JVM_FindLoadedClass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
1082 ResourceMark rm(THREAD);
1083
1084 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
1085 char* str = java_lang_String::as_utf8_string(h_name());
1086
1087 // Sanity check, don't expect null
1088 if (str == nullptr) return nullptr;
1089
1090 // Internalize the string, converting '.' to '/' in string.
1091 char* p = (char*)str;
1092 while (*p != '\0') {
1093 if (*p == '.') {
1094 *p = '/';
1095 }
1096 p++;
1097 }
1098
1099 const int str_len = (int)(p - str);
1100 if (str_len > Symbol::max_length()) {
1101 // It's impossible to create this class; the name cannot fit
1107 // Security Note:
1108 // The Java level wrapper will perform the necessary security check allowing
1109 // us to pass the null as the initiating class loader.
1110 Handle h_loader(THREAD, JNIHandles::resolve(loader));
1111 Klass* k = SystemDictionary::find_instance_or_array_klass(THREAD, klass_name,
1112 h_loader,
1113 Handle());
1114 #if INCLUDE_CDS
1115 if (k == nullptr) {
1116 // If the class is not already loaded, try to see if it's in the shared
1117 // archive for the current classloader (h_loader).
1118 k = SystemDictionaryShared::find_or_load_shared_class(klass_name, h_loader, CHECK_NULL);
1119 }
1120 #endif
1121 return (k == nullptr) ? nullptr :
1122 (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
1123 JVM_END
1124
1125 // Module support //////////////////////////////////////////////////////////////////////////////
1126
1127 JVM_ENTRY_PROF(void, JVM_DefineModule, JVM_DefineModule(JNIEnv *env, jobject module, jboolean is_open, jstring version,
1128 jstring location, jobjectArray packages))
1129 Handle h_module (THREAD, JNIHandles::resolve(module));
1130 Modules::define_module(h_module, is_open, version, location, packages, CHECK);
1131 JVM_END
1132
1133 JVM_ENTRY_PROF(void, JVM_SetBootLoaderUnnamedModule, JVM_SetBootLoaderUnnamedModule(JNIEnv *env, jobject module))
1134 Handle h_module (THREAD, JNIHandles::resolve(module));
1135 Modules::set_bootloader_unnamed_module(h_module, CHECK);
1136 JVM_END
1137
1138 JVM_ENTRY_PROF(void, JVM_AddModuleExports, JVM_AddModuleExports(JNIEnv *env, jobject from_module, jstring package, jobject to_module))
1139 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1140 Handle h_to_module (THREAD, JNIHandles::resolve(to_module));
1141 Modules::add_module_exports_qualified(h_from_module, package, h_to_module, CHECK);
1142 JVM_END
1143
1144 JVM_ENTRY_PROF(void, JVM_AddModuleExportsToAllUnnamed, JVM_AddModuleExportsToAllUnnamed(JNIEnv *env, jobject from_module, jstring package))
1145 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1146 Modules::add_module_exports_to_all_unnamed(h_from_module, package, CHECK);
1147 JVM_END
1148
1149 JVM_ENTRY_PROF(void, JVM_AddModuleExportsToAll, JVM_AddModuleExportsToAll(JNIEnv *env, jobject from_module, jstring package))
1150 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1151 Modules::add_module_exports(h_from_module, package, Handle(), CHECK);
1152 JVM_END
1153
1154 JVM_ENTRY_PROF(void, JVM_AddReadsModule, JVM_AddReadsModule(JNIEnv *env, jobject from_module, jobject source_module))
1155 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1156 Handle h_source_module (THREAD, JNIHandles::resolve(source_module));
1157 Modules::add_reads_module(h_from_module, h_source_module, CHECK);
1158 JVM_END
1159
1160 JVM_ENTRY_PROF(void, JVM_DefineArchivedModules, JVM_DefineArchivedModules(JNIEnv *env, jobject platform_loader, jobject system_loader))
1161 Handle h_platform_loader (THREAD, JNIHandles::resolve(platform_loader));
1162 Handle h_system_loader (THREAD, JNIHandles::resolve(system_loader));
1163 Modules::define_archived_modules(h_platform_loader, h_system_loader, CHECK);
1164 JVM_END
1165
1166 // Reflection support //////////////////////////////////////////////////////////////////////////////
1167
1168 JVM_ENTRY_PROF(jstring, JVM_InitClassName, JVM_InitClassName(JNIEnv *env, jclass cls))
1169 assert (cls != nullptr, "illegal class");
1170 JvmtiVMObjectAllocEventCollector oam;
1171 ResourceMark rm(THREAD);
1172 HandleMark hm(THREAD);
1173 Handle java_class(THREAD, JNIHandles::resolve(cls));
1174 oop result = java_lang_Class::name(java_class, CHECK_NULL);
1175 return (jstring) JNIHandles::make_local(THREAD, result);
1176 JVM_END
1177
1178
1179 JVM_ENTRY_PROF(jobjectArray, JVM_GetClassInterfaces, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
1180 JvmtiVMObjectAllocEventCollector oam;
1181 oop mirror = JNIHandles::resolve_non_null(cls);
1182
1183 // Special handling for primitive objects
1184 if (java_lang_Class::is_primitive(mirror)) {
1185 // Primitive objects does not have any interfaces
1186 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(), 0, CHECK_NULL);
1187 return (jobjectArray) JNIHandles::make_local(THREAD, r);
1188 }
1189
1190 Klass* klass = java_lang_Class::as_Klass(mirror);
1191 // Figure size of result array
1192 int size;
1193 if (klass->is_instance_klass()) {
1194 size = InstanceKlass::cast(klass)->local_interfaces()->length();
1195 } else {
1196 assert(klass->is_objArray_klass() || klass->is_typeArray_klass(), "Illegal mirror klass");
1197 size = 2;
1198 }
1199
1200 // Allocate result array
1201 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(), size, CHECK_NULL);
1202 objArrayHandle result (THREAD, r);
1203 // Fill in result
1204 if (klass->is_instance_klass()) {
1205 // Regular instance klass, fill in all local interfaces
1206 for (int index = 0; index < size; index++) {
1207 Klass* k = InstanceKlass::cast(klass)->local_interfaces()->at(index);
1208 result->obj_at_put(index, k->java_mirror());
1209 }
1210 } else {
1211 // All arrays implement java.lang.Cloneable and java.io.Serializable
1212 result->obj_at_put(0, vmClasses::Cloneable_klass()->java_mirror());
1213 result->obj_at_put(1, vmClasses::Serializable_klass()->java_mirror());
1214 }
1215 return (jobjectArray) JNIHandles::make_local(THREAD, result());
1216 JVM_END
1217
1218
1219 JVM_ENTRY_PROF(jboolean, JVM_IsInterface, JVM_IsInterface(JNIEnv *env, jclass cls))
1220 oop mirror = JNIHandles::resolve_non_null(cls);
1221 if (java_lang_Class::is_primitive(mirror)) {
1222 return JNI_FALSE;
1223 }
1224 Klass* k = java_lang_Class::as_Klass(mirror);
1225 jboolean result = k->is_interface();
1226 assert(!result || k->is_instance_klass(),
1227 "all interfaces are instance types");
1228 // The compiler intrinsic for isInterface tests the
1229 // Klass::_access_flags bits in the same way.
1230 return result;
1231 JVM_END
1232
1233 JVM_ENTRY_PROF(jboolean, JVM_IsHiddenClass, JVM_IsHiddenClass(JNIEnv *env, jclass cls))
1234 oop mirror = JNIHandles::resolve_non_null(cls);
1235 if (java_lang_Class::is_primitive(mirror)) {
1236 return JNI_FALSE;
1237 }
1238 Klass* k = java_lang_Class::as_Klass(mirror);
1239 return k->is_hidden();
1240 JVM_END
1241
1242 JVM_ENTRY_PROF(jobjectArray, JVM_GetClassSigners, JVM_GetClassSigners(JNIEnv *env, jclass cls))
1243 JvmtiVMObjectAllocEventCollector oam;
1244 oop mirror = JNIHandles::resolve_non_null(cls);
1245 if (java_lang_Class::is_primitive(mirror)) {
1246 // There are no signers for primitive types
1247 return nullptr;
1248 }
1249
1250 objArrayHandle signers(THREAD, java_lang_Class::signers(mirror));
1251
1252 // If there are no signers set in the class, or if the class
1253 // is an array, return null.
1254 if (signers == nullptr) return nullptr;
1255
1256 // copy of the signers array
1257 Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass();
1258 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1259 for (int index = 0; index < signers->length(); index++) {
1260 signers_copy->obj_at_put(index, signers->obj_at(index));
1261 }
1262
1263 // return the copy
1264 return (jobjectArray) JNIHandles::make_local(THREAD, signers_copy);
1265 JVM_END
1266
1267
1268 JVM_ENTRY_PROF(void, JVM_SetClassSigners, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1269 oop mirror = JNIHandles::resolve_non_null(cls);
1270 if (!java_lang_Class::is_primitive(mirror)) {
1271 // This call is ignored for primitive types and arrays.
1272 // Signers are only set once, ClassLoader.java, and thus shouldn't
1273 // be called with an array. Only the bootstrap loader creates arrays.
1274 Klass* k = java_lang_Class::as_Klass(mirror);
1275 if (k->is_instance_klass()) {
1276 java_lang_Class::set_signers(k->java_mirror(), objArrayOop(JNIHandles::resolve(signers)));
1277 }
1278 }
1279 JVM_END
1280
1281
1282 JVM_ENTRY_PROF(jobject, JVM_GetProtectionDomain, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1283 oop mirror = JNIHandles::resolve_non_null(cls);
1284 if (mirror == nullptr) {
1285 THROW_(vmSymbols::java_lang_NullPointerException(), nullptr);
1286 }
1287
1288 if (java_lang_Class::is_primitive(mirror)) {
1289 // Primitive types does not have a protection domain.
1290 return nullptr;
1291 }
1292
1293 oop pd = java_lang_Class::protection_domain(mirror);
1294 return (jobject) JNIHandles::make_local(THREAD, pd);
1295 JVM_END
1296
1297
1298 // Returns the inherited_access_control_context field of the running thread.
1299 JVM_ENTRY_PROF(jobject, JVM_GetInheritedAccessControlContext, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1300 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1301 return JNIHandles::make_local(THREAD, result);
1302 JVM_END
1303
1304 JVM_ENTRY_PROF(jobject, JVM_GetStackAccessControlContext, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1305 if (!UsePrivilegedStack) return nullptr;
1306
1307 ResourceMark rm(THREAD);
1308 GrowableArray<Handle>* local_array = new GrowableArray<Handle>(12);
1309 JvmtiVMObjectAllocEventCollector oam;
1310
1311 // count the protection domains on the execution stack. We collapse
1312 // duplicate consecutive protection domains into a single one, as
1313 // well as stopping when we hit a privileged frame.
1314
1315 oop previous_protection_domain = nullptr;
1316 Handle privileged_context(thread, nullptr);
1317 bool is_privileged = false;
1318 oop protection_domain = nullptr;
1319
1320 // Iterate through Java frames
1321 vframeStream vfst(thread);
1322 for(; !vfst.at_end(); vfst.next()) {
1323 // get method of frame
1324 Method* method = vfst.method();
1368 local_array->length(), CHECK_NULL);
1369 objArrayHandle h_context(thread, context);
1370 for (int index = 0; index < local_array->length(); index++) {
1371 h_context->obj_at_put(index, local_array->at(index)());
1372 }
1373
1374 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1375
1376 return JNIHandles::make_local(THREAD, result);
1377 JVM_END
1378
1379 class ScopedValueBindingsResolver {
1380 public:
1381 InstanceKlass* Carrier_klass;
1382 ScopedValueBindingsResolver(JavaThread* THREAD) {
1383 Klass *k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_ScopedValue_Carrier(), true, THREAD);
1384 Carrier_klass = InstanceKlass::cast(k);
1385 }
1386 };
1387
1388 JVM_ENTRY_PROF(jobject, JVM_FindScopedValueBindings, JVM_FindScopedValueBindings(JNIEnv *env, jclass cls))
1389 ResourceMark rm(THREAD);
1390 GrowableArray<Handle>* local_array = new GrowableArray<Handle>(12);
1391 JvmtiVMObjectAllocEventCollector oam;
1392
1393 static ScopedValueBindingsResolver resolver(THREAD);
1394
1395 // Iterate through Java frames
1396 vframeStream vfst(thread);
1397 for(; !vfst.at_end(); vfst.next()) {
1398 int loc = -1;
1399 // get method of frame
1400 Method* method = vfst.method();
1401
1402 Symbol *name = method->name();
1403
1404 InstanceKlass* holder = method->method_holder();
1405 if (name == vmSymbols::runWith_method_name()) {
1406 if (holder == vmClasses::Thread_klass()
1407 || holder == resolver.Carrier_klass) {
1408 loc = 1;
1409 }
1410 }
1411
1412 if (loc != -1) {
1413 javaVFrame *frame = vfst.asJavaVFrame();
1414 StackValueCollection* locals = frame->locals();
1415 StackValue* head_sv = locals->at(loc); // java/lang/ScopedValue$Snapshot
1416 Handle result = head_sv->get_obj();
1417 assert(!head_sv->obj_is_scalar_replaced(), "found scalar-replaced object");
1418 if (result() != nullptr) {
1419 return JNIHandles::make_local(THREAD, result());
1420 }
1421 }
1422 }
1423
1424 return nullptr;
1425 JVM_END
1426
1427 JVM_ENTRY_PROF(jboolean, JVM_IsArrayClass, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1428 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1429 return (k != nullptr) && k->is_array_klass() ? true : false;
1430 JVM_END
1431
1432
1433 JVM_ENTRY_PROF(jboolean, JVM_IsPrimitiveClass, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1434 oop mirror = JNIHandles::resolve_non_null(cls);
1435 return (jboolean) java_lang_Class::is_primitive(mirror);
1436 JVM_END
1437
1438
1439 JVM_ENTRY_PROF(jint, JVM_GetClassModifiers, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1440 oop mirror = JNIHandles::resolve_non_null(cls);
1441 if (java_lang_Class::is_primitive(mirror)) {
1442 // Primitive type
1443 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1444 }
1445
1446 Klass* k = java_lang_Class::as_Klass(mirror);
1447 debug_only(int computed_modifiers = k->compute_modifier_flags());
1448 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1449 return k->modifier_flags();
1450 JVM_END
1451
1452
1453 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1454
1455 JVM_ENTRY_PROF(jobjectArray, JVM_GetDeclaredClasses, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1456 JvmtiVMObjectAllocEventCollector oam;
1457 // ofClass is a reference to a java_lang_Class object. The mirror object
1458 // of an InstanceKlass
1459 oop ofMirror = JNIHandles::resolve_non_null(ofClass);
1460 if (java_lang_Class::is_primitive(ofMirror) ||
1461 ! java_lang_Class::as_Klass(ofMirror)->is_instance_klass()) {
1462 oop result = oopFactory::new_objArray(vmClasses::Class_klass(), 0, CHECK_NULL);
1463 return (jobjectArray)JNIHandles::make_local(THREAD, result);
1464 }
1465
1466 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(ofMirror));
1467 InnerClassesIterator iter(k);
1468
1469 if (iter.length() == 0) {
1470 // Neither an inner nor outer class
1471 oop result = oopFactory::new_objArray(vmClasses::Class_klass(), 0, CHECK_NULL);
1472 return (jobjectArray)JNIHandles::make_local(THREAD, result);
1473 }
1474
1475 // find inner class info
1501 result->obj_at_put(members, inner_klass->java_mirror());
1502 members++;
1503 }
1504 }
1505 }
1506 }
1507
1508 if (members != length) {
1509 // Return array of right length
1510 objArrayOop res = oopFactory::new_objArray(vmClasses::Class_klass(), members, CHECK_NULL);
1511 for(int i = 0; i < members; i++) {
1512 res->obj_at_put(i, result->obj_at(i));
1513 }
1514 return (jobjectArray)JNIHandles::make_local(THREAD, res);
1515 }
1516
1517 return (jobjectArray)JNIHandles::make_local(THREAD, result());
1518 JVM_END
1519
1520
1521 JVM_ENTRY_PROF(jclass, JVM_GetDeclaringClass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1522 {
1523 // ofClass is a reference to a java_lang_Class object.
1524 oop ofMirror = JNIHandles::resolve_non_null(ofClass);
1525 if (java_lang_Class::is_primitive(ofMirror)) {
1526 return nullptr;
1527 }
1528 Klass* klass = java_lang_Class::as_Klass(ofMirror);
1529 if (!klass->is_instance_klass()) {
1530 return nullptr;
1531 }
1532
1533 bool inner_is_member = false;
1534 Klass* outer_klass
1535 = InstanceKlass::cast(klass)->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1536 if (outer_klass == nullptr) return nullptr; // already a top-level class
1537 if (!inner_is_member) return nullptr; // a hidden class (inside a method)
1538 return (jclass) JNIHandles::make_local(THREAD, outer_klass->java_mirror());
1539 }
1540 JVM_END
1541
1542 JVM_ENTRY_PROF(jstring, JVM_GetSimpleBinaryName, JVM_GetSimpleBinaryName(JNIEnv *env, jclass cls))
1543 {
1544 oop mirror = JNIHandles::resolve_non_null(cls);
1545 if (java_lang_Class::is_primitive(mirror)) {
1546 return nullptr;
1547 }
1548 Klass* klass = java_lang_Class::as_Klass(mirror);
1549 if (!klass->is_instance_klass()) {
1550 return nullptr;
1551 }
1552 InstanceKlass* k = InstanceKlass::cast(klass);
1553 int ooff = 0, noff = 0;
1554 if (k->find_inner_classes_attr(&ooff, &noff, THREAD)) {
1555 if (noff != 0) {
1556 constantPoolHandle i_cp(thread, k->constants());
1557 Symbol* name = i_cp->symbol_at(noff);
1558 Handle str = java_lang_String::create_from_symbol(name, CHECK_NULL);
1559 return (jstring) JNIHandles::make_local(THREAD, str());
1560 }
1561 }
1562 return nullptr;
1563 }
1564 JVM_END
1565
1566 JVM_ENTRY_PROF(jstring, JVM_GetClassSignature, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1567 assert (cls != nullptr, "illegal class");
1568 JvmtiVMObjectAllocEventCollector oam;
1569 ResourceMark rm(THREAD);
1570 oop mirror = JNIHandles::resolve_non_null(cls);
1571 // Return null for arrays and primitives
1572 if (!java_lang_Class::is_primitive(mirror)) {
1573 Klass* k = java_lang_Class::as_Klass(mirror);
1574 if (k->is_instance_klass()) {
1575 Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1576 if (sym == nullptr) return nullptr;
1577 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1578 return (jstring) JNIHandles::make_local(THREAD, str());
1579 }
1580 }
1581 return nullptr;
1582 JVM_END
1583
1584
1585 JVM_ENTRY_PROF(jbyteArray, JVM_GetClassAnnotations, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1586 assert (cls != nullptr, "illegal class");
1587 oop mirror = JNIHandles::resolve_non_null(cls);
1588 // Return null for arrays and primitives
1589 if (!java_lang_Class::is_primitive(mirror)) {
1590 Klass* k = java_lang_Class::as_Klass(mirror);
1591 if (k->is_instance_klass()) {
1592 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1593 return (jbyteArray) JNIHandles::make_local(THREAD, a);
1594 }
1595 }
1596 return nullptr;
1597 JVM_END
1598
1599
1600 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd) {
1601 // some of this code was adapted from from jni_FromReflectedField
1602
1603 oop reflected = JNIHandles::resolve_non_null(field);
1604 oop mirror = java_lang_reflect_Field::clazz(reflected);
1605 Klass* k = java_lang_Class::as_Klass(mirror);
1634 int slot = 0;
1635
1636 if (reflected->klass() == vmClasses::reflect_Constructor_klass()) {
1637 mirror = java_lang_reflect_Constructor::clazz(reflected);
1638 slot = java_lang_reflect_Constructor::slot(reflected);
1639 } else {
1640 assert(reflected->klass() == vmClasses::reflect_Method_klass(),
1641 "wrong type");
1642 mirror = java_lang_reflect_Method::clazz(reflected);
1643 slot = java_lang_reflect_Method::slot(reflected);
1644 }
1645 Klass* k = java_lang_Class::as_Klass(mirror);
1646
1647 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1648 assert(m != nullptr, "cannot find method");
1649 return m; // caller has to deal with null in product mode
1650 }
1651
1652 /* Type use annotations support (JDK 1.8) */
1653
1654 JVM_ENTRY_PROF(jbyteArray, JVM_GetClassTypeAnnotations, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1655 assert (cls != nullptr, "illegal class");
1656 ResourceMark rm(THREAD);
1657 // Return null for arrays and primitives
1658 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1659 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1660 if (k->is_instance_klass()) {
1661 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1662 if (type_annotations != nullptr) {
1663 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1664 return (jbyteArray) JNIHandles::make_local(THREAD, a);
1665 }
1666 }
1667 }
1668 return nullptr;
1669 JVM_END
1670
1671 JVM_ENTRY_PROF(jbyteArray, JVM_GetMethodTypeAnnotations, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1672 assert (method != nullptr, "illegal method");
1673 // method is a handle to a java.lang.reflect.Method object
1674 Method* m = jvm_get_method_common(method);
1675 if (m == nullptr) {
1676 return nullptr;
1677 }
1678
1679 AnnotationArray* type_annotations = m->type_annotations();
1680 if (type_annotations != nullptr) {
1681 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1682 return (jbyteArray) JNIHandles::make_local(THREAD, a);
1683 }
1684
1685 return nullptr;
1686 JVM_END
1687
1688 JVM_ENTRY_PROF(jbyteArray, JVM_GetFieldTypeAnnotations, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1689 assert (field != nullptr, "illegal field");
1690 fieldDescriptor fd;
1691 bool gotFd = jvm_get_field_common(field, fd);
1692 if (!gotFd) {
1693 return nullptr;
1694 }
1695
1696 return (jbyteArray) JNIHandles::make_local(THREAD, Annotations::make_java_array(fd.type_annotations(), THREAD));
1697 JVM_END
1698
1699 static void bounds_check(const constantPoolHandle& cp, jint index, TRAPS) {
1700 if (!cp->is_within_bounds(index)) {
1701 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1702 }
1703 }
1704
1705 JVM_ENTRY_PROF(jobjectArray, JVM_GetMethodParameters, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1706 {
1707 // method is a handle to a java.lang.reflect.Method object
1708 Method* method_ptr = jvm_get_method_common(method);
1709 methodHandle mh (THREAD, method_ptr);
1710 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1711 const int num_params = mh->method_parameters_length();
1712
1713 if (num_params < 0) {
1714 // A -1 return value from method_parameters_length means there is no
1715 // parameter data. Return null to indicate this to the reflection
1716 // API.
1717 assert(num_params == -1, "num_params should be -1 if it is less than zero");
1718 return (jobjectArray)nullptr;
1719 } else {
1720 // Otherwise, we return something up to reflection, even if it is
1721 // a zero-length array. Why? Because in some cases this can
1722 // trigger a MalformedParametersException.
1723
1724 // make sure all the symbols are properly formatted
1725 for (int i = 0; i < num_params; i++) {
1738 objArrayOop result_oop = oopFactory::new_objArray(vmClasses::reflect_Parameter_klass(), num_params, CHECK_NULL);
1739 objArrayHandle result (THREAD, result_oop);
1740
1741 for (int i = 0; i < num_params; i++) {
1742 MethodParametersElement* params = mh->method_parameters_start();
1743 // For a 0 index, give a null symbol
1744 Symbol* sym = 0 != params[i].name_cp_index ?
1745 mh->constants()->symbol_at(params[i].name_cp_index) : nullptr;
1746 int flags = params[i].flags;
1747 oop param = Reflection::new_parameter(reflected_method, i, sym,
1748 flags, CHECK_NULL);
1749 result->obj_at_put(i, param);
1750 }
1751 return (jobjectArray)JNIHandles::make_local(THREAD, result());
1752 }
1753 }
1754 JVM_END
1755
1756 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1757
1758 JVM_ENTRY_PROF(jobjectArray, JVM_GetClassDeclaredFields, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1759 {
1760 JvmtiVMObjectAllocEventCollector oam;
1761
1762 oop ofMirror = JNIHandles::resolve_non_null(ofClass);
1763 // Exclude primitive types and array types
1764 if (java_lang_Class::is_primitive(ofMirror) ||
1765 java_lang_Class::as_Klass(ofMirror)->is_array_klass()) {
1766 // Return empty array
1767 oop res = oopFactory::new_objArray(vmClasses::reflect_Field_klass(), 0, CHECK_NULL);
1768 return (jobjectArray) JNIHandles::make_local(THREAD, res);
1769 }
1770
1771 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(ofMirror));
1772 constantPoolHandle cp(THREAD, k->constants());
1773
1774 // Ensure class is linked
1775 k->link_class(CHECK_NULL);
1776
1777 // Allocate result
1778 int num_fields;
1789 objArrayOop r = oopFactory::new_objArray(vmClasses::reflect_Field_klass(), num_fields, CHECK_NULL);
1790 objArrayHandle result (THREAD, r);
1791
1792 int out_idx = 0;
1793 fieldDescriptor fd;
1794 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1795 if (!publicOnly || fs.access_flags().is_public()) {
1796 fd.reinitialize(k, fs.index());
1797 oop field = Reflection::new_field(&fd, CHECK_NULL);
1798 result->obj_at_put(out_idx, field);
1799 ++out_idx;
1800 }
1801 }
1802 assert(out_idx == num_fields, "just checking");
1803 return (jobjectArray) JNIHandles::make_local(THREAD, result());
1804 }
1805 JVM_END
1806
1807 // A class is a record if and only if it is final and a direct subclass of
1808 // java.lang.Record and has a Record attribute; otherwise, it is not a record.
1809 JVM_ENTRY_PROF(jboolean, JVM_IsRecord, JVM_IsRecord(JNIEnv *env, jclass cls))
1810 {
1811 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1812 if (k != nullptr && k->is_instance_klass()) {
1813 InstanceKlass* ik = InstanceKlass::cast(k);
1814 return ik->is_record();
1815 } else {
1816 return false;
1817 }
1818 }
1819 JVM_END
1820
1821 // Returns an array containing the components of the Record attribute,
1822 // or null if the attribute is not present.
1823 //
1824 // Note that this function returns the components of the Record attribute
1825 // even if the class is not a record.
1826 JVM_ENTRY_PROF(jobjectArray, JVM_GetRecordComponents, JVM_GetRecordComponents(JNIEnv* env, jclass ofClass))
1827 {
1828 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass));
1829 assert(c->is_instance_klass(), "must be");
1830 InstanceKlass* ik = InstanceKlass::cast(c);
1831
1832 Array<RecordComponent*>* components = ik->record_components();
1833 if (components != nullptr) {
1834 JvmtiVMObjectAllocEventCollector oam;
1835 constantPoolHandle cp(THREAD, ik->constants());
1836 int length = components->length();
1837 assert(length >= 0, "unexpected record_components length");
1838 objArrayOop record_components =
1839 oopFactory::new_objArray(vmClasses::RecordComponent_klass(), length, CHECK_NULL);
1840 objArrayHandle components_h (THREAD, record_components);
1841
1842 for (int x = 0; x < length; x++) {
1843 RecordComponent* component = components->at(x);
1844 assert(component != nullptr, "unexpected null record component");
1845 oop component_oop = java_lang_reflect_RecordComponent::create(ik, component, CHECK_NULL);
1846 components_h->obj_at_put(x, component_oop);
1913 for (int i = 0; i < num_methods; i++) {
1914 methodHandle method(THREAD, k->method_with_idnum(idnums->at(i)));
1915 if (method.is_null()) {
1916 // Method may have been deleted and seems this API can handle null
1917 // Otherwise should probably put a method that throws NSME
1918 result->obj_at_put(i, nullptr);
1919 } else {
1920 oop m;
1921 if (want_constructor) {
1922 m = Reflection::new_constructor(method, CHECK_NULL);
1923 } else {
1924 m = Reflection::new_method(method, false, CHECK_NULL);
1925 }
1926 result->obj_at_put(i, m);
1927 }
1928 }
1929
1930 return (jobjectArray) JNIHandles::make_local(THREAD, result());
1931 }
1932
1933 JVM_ENTRY_PROF(jobjectArray, JVM_GetClassDeclaredMethods, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1934 {
1935 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1936 /*want_constructor*/ false,
1937 vmClasses::reflect_Method_klass(), THREAD);
1938 }
1939 JVM_END
1940
1941 JVM_ENTRY_PROF(jobjectArray, JVM_GetClassDeclaredConstructors, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1942 {
1943 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1944 /*want_constructor*/ true,
1945 vmClasses::reflect_Constructor_klass(), THREAD);
1946 }
1947 JVM_END
1948
1949 JVM_ENTRY_PROF(jint, JVM_GetClassAccessFlags, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1950 {
1951 oop mirror = JNIHandles::resolve_non_null(cls);
1952 if (java_lang_Class::is_primitive(mirror)) {
1953 // Primitive type
1954 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1955 }
1956
1957 Klass* k = java_lang_Class::as_Klass(mirror);
1958 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1959 }
1960 JVM_END
1961
1962 JVM_ENTRY_PROF(jboolean, JVM_AreNestMates, JVM_AreNestMates(JNIEnv *env, jclass current, jclass member))
1963 {
1964 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1965 assert(c->is_instance_klass(), "must be");
1966 InstanceKlass* ck = InstanceKlass::cast(c);
1967 Klass* m = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(member));
1968 assert(m->is_instance_klass(), "must be");
1969 InstanceKlass* mk = InstanceKlass::cast(m);
1970 return ck->has_nestmate_access_to(mk, THREAD);
1971 }
1972 JVM_END
1973
1974 JVM_ENTRY_PROF(jclass, JVM_GetNestHost, JVM_GetNestHost(JNIEnv* env, jclass current))
1975 {
1976 // current is not a primitive or array class
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 InstanceKlass* host = ck->nest_host(THREAD);
1981 return (jclass) (host == nullptr ? nullptr :
1982 JNIHandles::make_local(THREAD, host->java_mirror()));
1983 }
1984 JVM_END
1985
1986 JVM_ENTRY_PROF(jobjectArray, JVM_GetNestMembers, JVM_GetNestMembers(JNIEnv* env, jclass current))
1987 {
1988 // current is not a primitive or array class
1989 ResourceMark rm(THREAD);
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
1995 log_trace(class, nestmates)("Calling GetNestMembers for type %s with nest-host %s",
1996 ck->external_name(), host->external_name());
1997 {
1998 JvmtiVMObjectAllocEventCollector oam;
1999 Array<u2>* members = host->nest_members();
2000 int length = members == nullptr ? 0 : members->length();
2001
2002 log_trace(class, nestmates)(" - host has %d listed nest members", length);
2003
2004 // nest host is first in the array so make it one bigger
2005 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(),
2006 length + 1, CHECK_NULL);
2046 log_trace(class, nestmates)(" - compacting array from length %d to %d",
2047 length + 1, count + 1);
2048
2049 objArrayOop r2 = oopFactory::new_objArray(vmClasses::Class_klass(),
2050 count + 1, CHECK_NULL);
2051 objArrayHandle result2(THREAD, r2);
2052 for (int i = 0; i < count + 1; i++) {
2053 result2->obj_at_put(i, result->obj_at(i));
2054 }
2055 return (jobjectArray)JNIHandles::make_local(THREAD, result2());
2056 }
2057 }
2058 else {
2059 assert(host == ck || ck->is_hidden(), "must be singleton nest or dynamic nestmate");
2060 }
2061 return (jobjectArray)JNIHandles::make_local(THREAD, result());
2062 }
2063 }
2064 JVM_END
2065
2066 JVM_ENTRY_PROF(jobjectArray, JVM_GetPermittedSubclasses, JVM_GetPermittedSubclasses(JNIEnv* env, jclass current))
2067 {
2068 oop mirror = JNIHandles::resolve_non_null(current);
2069 assert(!java_lang_Class::is_primitive(mirror), "should not be");
2070 Klass* c = java_lang_Class::as_Klass(mirror);
2071 assert(c->is_instance_klass(), "must be");
2072 InstanceKlass* ik = InstanceKlass::cast(c);
2073 ResourceMark rm(THREAD);
2074 log_trace(class, sealed)("Calling GetPermittedSubclasses for %s type %s",
2075 ik->is_sealed() ? "sealed" : "non-sealed", ik->external_name());
2076 if (ik->is_sealed()) {
2077 JvmtiVMObjectAllocEventCollector oam;
2078 Array<u2>* subclasses = ik->permitted_subclasses();
2079 int length = subclasses->length();
2080
2081 log_trace(class, sealed)(" - sealed class has %d permitted subclasses", length);
2082
2083 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(),
2084 length, CHECK_NULL);
2085 objArrayHandle result(THREAD, r);
2086 int count = 0;
2109 }
2110 if (count < length) {
2111 // we had invalid entries so we need to compact the array
2112 objArrayOop r2 = oopFactory::new_objArray(vmClasses::Class_klass(),
2113 count, CHECK_NULL);
2114 objArrayHandle result2(THREAD, r2);
2115 for (int i = 0; i < count; i++) {
2116 result2->obj_at_put(i, result->obj_at(i));
2117 }
2118 return (jobjectArray)JNIHandles::make_local(THREAD, result2());
2119 }
2120 return (jobjectArray)JNIHandles::make_local(THREAD, result());
2121 } else {
2122 return nullptr;
2123 }
2124 }
2125 JVM_END
2126
2127 // Constant pool access //////////////////////////////////////////////////////////
2128
2129 JVM_ENTRY_PROF(jobject, JVM_GetClassConstantPool, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
2130 {
2131 JvmtiVMObjectAllocEventCollector oam;
2132 oop mirror = JNIHandles::resolve_non_null(cls);
2133 // Return null for primitives and arrays
2134 if (!java_lang_Class::is_primitive(mirror)) {
2135 Klass* k = java_lang_Class::as_Klass(mirror);
2136 if (k->is_instance_klass()) {
2137 InstanceKlass* k_h = InstanceKlass::cast(k);
2138 Handle jcp = reflect_ConstantPool::create(CHECK_NULL);
2139 reflect_ConstantPool::set_cp(jcp(), k_h->constants());
2140 return JNIHandles::make_local(THREAD, jcp());
2141 }
2142 }
2143 return nullptr;
2144 }
2145 JVM_END
2146
2147
2148 JVM_ENTRY_PROF(jint, JVM_ConstantPoolGetSize, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
2149 {
2150 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2151 return cp->length();
2152 }
2153 JVM_END
2154
2155
2156 JVM_ENTRY_PROF(jclass, JVM_ConstantPoolGetClassAt, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2157 {
2158 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2159 bounds_check(cp, index, CHECK_NULL);
2160 constantTag tag = cp->tag_at(index);
2161 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
2162 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2163 }
2164 Klass* k = cp->klass_at(index, CHECK_NULL);
2165 return (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
2166 }
2167 JVM_END
2168
2169 JVM_ENTRY_PROF(jclass, JVM_ConstantPoolGetClassAtIfLoaded, JVM_ConstantPoolGetClassAtIfLoaded(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 = ConstantPool::klass_at_if_loaded(cp, index);
2178 if (k == nullptr) return nullptr;
2179 return (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
2180 }
2181 JVM_END
2182
2183 static jobject get_method_at_helper(const constantPoolHandle& cp, jint index, bool force_resolution, TRAPS) {
2184 constantTag tag = cp->tag_at(index);
2185 if (!tag.is_method() && !tag.is_interface_method()) {
2186 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2187 }
2188 int klass_ref = cp->uncached_klass_ref_index_at(index);
2189 Klass* k_o;
2192 } else {
2193 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2194 if (k_o == nullptr) return nullptr;
2195 }
2196 InstanceKlass* k = InstanceKlass::cast(k_o);
2197 Symbol* name = cp->uncached_name_ref_at(index);
2198 Symbol* sig = cp->uncached_signature_ref_at(index);
2199 methodHandle m (THREAD, k->find_method(name, sig));
2200 if (m.is_null()) {
2201 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
2202 }
2203 oop method;
2204 if (!m->is_initializer() || m->is_static()) {
2205 method = Reflection::new_method(m, true, CHECK_NULL);
2206 } else {
2207 method = Reflection::new_constructor(m, CHECK_NULL);
2208 }
2209 return JNIHandles::make_local(THREAD, method);
2210 }
2211
2212 JVM_ENTRY_PROF(jobject, JVM_ConstantPoolGetMethodAt, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2213 {
2214 JvmtiVMObjectAllocEventCollector oam;
2215 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2216 bounds_check(cp, index, CHECK_NULL);
2217 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
2218 return res;
2219 }
2220 JVM_END
2221
2222 JVM_ENTRY_PROF(jobject, JVM_ConstantPoolGetMethodAtIfLoaded, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2223 {
2224 JvmtiVMObjectAllocEventCollector oam;
2225 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2226 bounds_check(cp, index, CHECK_NULL);
2227 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
2228 return res;
2229 }
2230 JVM_END
2231
2232 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2233 constantTag tag = cp->tag_at(index);
2234 if (!tag.is_field()) {
2235 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2236 }
2237 int klass_ref = cp->uncached_klass_ref_index_at(index);
2238 Klass* k_o;
2239 if (force_resolution) {
2240 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2241 } else {
2242 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2243 if (k_o == nullptr) return nullptr;
2244 }
2245 InstanceKlass* k = InstanceKlass::cast(k_o);
2246 Symbol* name = cp->uncached_name_ref_at(index);
2247 Symbol* sig = cp->uncached_signature_ref_at(index);
2248 fieldDescriptor fd;
2249 Klass* target_klass = k->find_field(name, sig, &fd);
2250 if (target_klass == nullptr) {
2251 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2252 }
2253 oop field = Reflection::new_field(&fd, CHECK_NULL);
2254 return JNIHandles::make_local(THREAD, field);
2255 }
2256
2257 JVM_ENTRY_PROF(jobject, JVM_ConstantPoolGetFieldAt, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
2258 {
2259 JvmtiVMObjectAllocEventCollector oam;
2260 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2261 bounds_check(cp, index, CHECK_NULL);
2262 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2263 return res;
2264 }
2265 JVM_END
2266
2267 JVM_ENTRY_PROF(jobject, JVM_ConstantPoolGetFieldAtIfLoaded, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2268 {
2269 JvmtiVMObjectAllocEventCollector oam;
2270 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2271 bounds_check(cp, index, CHECK_NULL);
2272 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2273 return res;
2274 }
2275 JVM_END
2276
2277 JVM_ENTRY_PROF(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2278 {
2279 JvmtiVMObjectAllocEventCollector oam;
2280 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2281 bounds_check(cp, index, CHECK_NULL);
2282 constantTag tag = cp->tag_at(index);
2283 if (!tag.is_field_or_method()) {
2284 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2285 }
2286 int klass_ref = cp->uncached_klass_ref_index_at(index);
2287 Symbol* klass_name = cp->klass_name_at(klass_ref);
2288 Symbol* member_name = cp->uncached_name_ref_at(index);
2289 Symbol* member_sig = cp->uncached_signature_ref_at(index);
2290 objArrayOop dest_o = oopFactory::new_objArray(vmClasses::String_klass(), 3, CHECK_NULL);
2291 objArrayHandle dest(THREAD, dest_o);
2292 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2293 dest->obj_at_put(0, str());
2294 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2295 dest->obj_at_put(1, str());
2296 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2297 dest->obj_at_put(2, str());
2298 return (jobjectArray) JNIHandles::make_local(THREAD, dest());
2299 }
2300 JVM_END
2301
2302 JVM_ENTRY_PROF(jint, JVM_ConstantPoolGetClassRefIndexAt, JVM_ConstantPoolGetClassRefIndexAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2303 {
2304 JvmtiVMObjectAllocEventCollector oam;
2305 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2306 bounds_check(cp, index, CHECK_0);
2307 constantTag tag = cp->tag_at(index);
2308 if (!tag.is_field_or_method()) {
2309 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2310 }
2311 return (jint) cp->uncached_klass_ref_index_at(index);
2312 }
2313 JVM_END
2314
2315 JVM_ENTRY_PROF(jint, JVM_ConstantPoolGetNameAndTypeRefIndexAt, JVM_ConstantPoolGetNameAndTypeRefIndexAt(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_invoke_dynamic() && !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_name_and_type_ref_index_at(index);
2325 }
2326 JVM_END
2327
2328 JVM_ENTRY_PROF(jobjectArray, JVM_ConstantPoolGetNameAndTypeRefInfoAt, JVM_ConstantPoolGetNameAndTypeRefInfoAt(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_NULL);
2333 constantTag tag = cp->tag_at(index);
2334 if (!tag.is_name_and_type()) {
2335 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2336 }
2337 Symbol* member_name = cp->symbol_at(cp->name_ref_index_at(index));
2338 Symbol* member_sig = cp->symbol_at(cp->signature_ref_index_at(index));
2339 objArrayOop dest_o = oopFactory::new_objArray(vmClasses::String_klass(), 2, CHECK_NULL);
2340 objArrayHandle dest(THREAD, dest_o);
2341 Handle str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2342 dest->obj_at_put(0, str());
2343 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2344 dest->obj_at_put(1, str());
2345 return (jobjectArray) JNIHandles::make_local(THREAD, dest());
2346 }
2347 JVM_END
2348
2349 JVM_ENTRY_PROF(jint, JVM_ConstantPoolGetIntAt, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2350 {
2351 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2352 bounds_check(cp, index, CHECK_0);
2353 constantTag tag = cp->tag_at(index);
2354 if (!tag.is_int()) {
2355 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2356 }
2357 return cp->int_at(index);
2358 }
2359 JVM_END
2360
2361 JVM_ENTRY_PROF(jlong, JVM_ConstantPoolGetLongAt, JVM_ConstantPoolGetLongAt(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_(0L));
2365 constantTag tag = cp->tag_at(index);
2366 if (!tag.is_long()) {
2367 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2368 }
2369 return cp->long_at(index);
2370 }
2371 JVM_END
2372
2373 JVM_ENTRY_PROF(jfloat, JVM_ConstantPoolGetFloatAt, JVM_ConstantPoolGetFloatAt(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_(0.0f));
2377 constantTag tag = cp->tag_at(index);
2378 if (!tag.is_float()) {
2379 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2380 }
2381 return cp->float_at(index);
2382 }
2383 JVM_END
2384
2385 JVM_ENTRY_PROF(jdouble, JVM_ConstantPoolGetDoubleAt, JVM_ConstantPoolGetDoubleAt(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_(0.0));
2389 constantTag tag = cp->tag_at(index);
2390 if (!tag.is_double()) {
2391 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2392 }
2393 return cp->double_at(index);
2394 }
2395 JVM_END
2396
2397 JVM_ENTRY_PROF(jstring, JVM_ConstantPoolGetStringAt, JVM_ConstantPoolGetStringAt(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_NULL);
2401 constantTag tag = cp->tag_at(index);
2402 if (!tag.is_string()) {
2403 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2404 }
2405 oop str = cp->string_at(index, CHECK_NULL);
2406 return (jstring) JNIHandles::make_local(THREAD, str);
2407 }
2408 JVM_END
2409
2410 JVM_ENTRY_PROF(jstring, JVM_ConstantPoolGetUTF8At, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
2411 {
2412 JvmtiVMObjectAllocEventCollector oam;
2413 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2414 bounds_check(cp, index, CHECK_NULL);
2415 constantTag tag = cp->tag_at(index);
2416 if (!tag.is_symbol()) {
2417 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2418 }
2419 Symbol* sym = cp->symbol_at(index);
2420 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2421 return (jstring) JNIHandles::make_local(THREAD, str());
2422 }
2423 JVM_END
2424
2425 JVM_ENTRY_PROF(jbyte, JVM_ConstantPoolGetTagAt, JVM_ConstantPoolGetTagAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2426 {
2427 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2428 bounds_check(cp, index, CHECK_0);
2429 constantTag tag = cp->tag_at(index);
2430 jbyte result = tag.value();
2431 // If returned tag values are not from the JVM spec, e.g. tags from 100 to 105,
2432 // they are changed to the corresponding tags from the JVM spec, so that java code in
2433 // sun.reflect.ConstantPool will return only tags from the JVM spec, not internal ones.
2434 if (tag.is_klass_or_reference()) {
2435 result = JVM_CONSTANT_Class;
2436 } else if (tag.is_string_index()) {
2437 result = JVM_CONSTANT_String;
2438 } else if (tag.is_method_type_in_error()) {
2439 result = JVM_CONSTANT_MethodType;
2440 } else if (tag.is_method_handle_in_error()) {
2441 result = JVM_CONSTANT_MethodHandle;
2442 } else if (tag.is_dynamic_constant_in_error()) {
2443 result = JVM_CONSTANT_Dynamic;
2444 }
2445 return result;
2446 }
2447 JVM_END
2448
2449 // Assertion support. //////////////////////////////////////////////////////////
2450
2451 JVM_ENTRY_PROF(jboolean, JVM_DesiredAssertionStatus, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2452 assert(cls != nullptr, "bad class");
2453
2454 oop r = JNIHandles::resolve(cls);
2455 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2456 if (java_lang_Class::is_primitive(r)) return false;
2457
2458 Klass* k = java_lang_Class::as_Klass(r);
2459 assert(k->is_instance_klass(), "must be an instance klass");
2460 if (!k->is_instance_klass()) return false;
2461
2462 ResourceMark rm(THREAD);
2463 const char* name = k->name()->as_C_string();
2464 bool system_class = k->class_loader() == nullptr;
2465 return JavaAssertions::enabled(name, system_class);
2466
2467 JVM_END
2468
2469
2470 // Return a new AssertionStatusDirectives object with the fields filled in with
2471 // command-line assertion arguments (i.e., -ea, -da).
2472 JVM_ENTRY_PROF(jobject, JVM_AssertionStatusDirectives, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2473 JvmtiVMObjectAllocEventCollector oam;
2474 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2475 return JNIHandles::make_local(THREAD, asd);
2476 JVM_END
2477
2478 // Verification ////////////////////////////////////////////////////////////////////////////////
2479
2480 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2481
2482 // RedefineClasses support: bug 6214132 caused verification to fail.
2483 // All functions from this section should call the jvmtiThreadSate function:
2484 // Klass* class_to_verify_considering_redefinition(Klass* klass).
2485 // The function returns a Klass* of the _scratch_class if the verifier
2486 // was invoked in the middle of the class redefinition.
2487 // Otherwise it returns its argument value which is the _the_class Klass*.
2488 // Please, refer to the description in the jvmtiThreadSate.hpp.
2489
2490 JVM_ENTRY_PROF(const char*, JVM_GetClassNameUTF, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2491 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2492 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2493 return k->name()->as_utf8();
2494 JVM_END
2495
2496
2497 JVM_ENTRY_PROF(void, JVM_GetClassCPTypes, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2498 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2499 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2500 // types will have length zero if this is not an InstanceKlass
2501 // (length is determined by call to JVM_GetClassCPEntriesCount)
2502 if (k->is_instance_klass()) {
2503 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2504 for (int index = cp->length() - 1; index >= 0; index--) {
2505 constantTag tag = cp->tag_at(index);
2506 types[index] = (tag.is_unresolved_klass()) ? (unsigned char) JVM_CONSTANT_Class : tag.value();
2507 }
2508 }
2509 JVM_END
2510
2511
2512 JVM_ENTRY_PROF(jint, JVM_GetClassCPEntriesCount, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2513 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2514 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2515 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->constants()->length();
2516 JVM_END
2517
2518
2519 JVM_ENTRY_PROF(jint, JVM_GetClassFieldsCount, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2520 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2521 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2522 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->java_fields_count();
2523 JVM_END
2524
2525
2526 JVM_ENTRY_PROF(jint, JVM_GetClassMethodsCount, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2527 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2528 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2529 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->methods()->length();
2530 JVM_END
2531
2532
2533 // The following methods, used for the verifier, are never called with
2534 // array klasses, so a direct cast to InstanceKlass is safe.
2535 // Typically, these methods are called in a loop with bounds determined
2536 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2537 // zero for arrays.
2538 JVM_ENTRY_PROF(void, JVM_GetMethodIxExceptionIndexes, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2539 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2540 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2541 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2542 int length = method->checked_exceptions_length();
2543 if (length > 0) {
2544 CheckedExceptionElement* table= method->checked_exceptions_start();
2545 for (int i = 0; i < length; i++) {
2546 exceptions[i] = table[i].class_cp_index;
2547 }
2548 }
2549 JVM_END
2550
2551
2552 JVM_ENTRY_PROF(jint, JVM_GetMethodIxExceptionsCount, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2553 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2554 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2555 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2556 return method->checked_exceptions_length();
2557 JVM_END
2558
2559
2560 JVM_ENTRY_PROF(void, JVM_GetMethodIxByteCode, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2561 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2562 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2563 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2564 memcpy(code, method->code_base(), method->code_size());
2565 JVM_END
2566
2567
2568 JVM_ENTRY_PROF(jint, JVM_GetMethodIxByteCodeLength, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2569 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2570 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2571 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2572 return method->code_size();
2573 JVM_END
2574
2575
2576 JVM_ENTRY_PROF(void, JVM_GetMethodIxExceptionTableEntry, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2577 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2578 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2579 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2580 ExceptionTable extable(method);
2581 entry->start_pc = extable.start_pc(entry_index);
2582 entry->end_pc = extable.end_pc(entry_index);
2583 entry->handler_pc = extable.handler_pc(entry_index);
2584 entry->catchType = extable.catch_type_index(entry_index);
2585 JVM_END
2586
2587
2588 JVM_ENTRY_PROF(jint, JVM_GetMethodIxExceptionTableLength, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
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 return method->exception_table_length();
2593 JVM_END
2594
2595
2596 JVM_ENTRY_PROF(jint, JVM_GetMethodIxModifiers, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2597 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2598 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2599 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2600 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2601 JVM_END
2602
2603
2604 JVM_ENTRY_PROF(jint, JVM_GetFieldIxModifiers, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2605 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2606 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2607 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2608 JVM_END
2609
2610
2611 JVM_ENTRY_PROF(jint, JVM_GetMethodIxLocalsCount, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2612 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2613 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2614 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2615 return method->max_locals();
2616 JVM_END
2617
2618
2619 JVM_ENTRY_PROF(jint, JVM_GetMethodIxArgsSize, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2620 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2621 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2622 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2623 return method->size_of_parameters();
2624 JVM_END
2625
2626
2627 JVM_ENTRY_PROF(jint, JVM_GetMethodIxMaxStack, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2628 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2629 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2630 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2631 return method->verifier_max_stack();
2632 JVM_END
2633
2634
2635 JVM_ENTRY_PROF(jboolean, JVM_IsConstructorIx, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2636 ResourceMark rm(THREAD);
2637 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2638 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2639 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2640 return method->name() == vmSymbols::object_initializer_name();
2641 JVM_END
2642
2643
2644 JVM_ENTRY_PROF(jboolean, JVM_IsVMGeneratedMethodIx, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2645 ResourceMark rm(THREAD);
2646 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2647 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2648 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2649 return method->is_overpass();
2650 JVM_END
2651
2652 JVM_ENTRY_PROF(const char*, JVM_GetMethodIxNameUTF, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2653 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2654 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2655 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2656 return method->name()->as_utf8();
2657 JVM_END
2658
2659
2660 JVM_ENTRY_PROF(const char*, JVM_GetMethodIxSignatureUTF, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2661 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2662 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2663 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2664 return method->signature()->as_utf8();
2665 JVM_END
2666
2667 /**
2668 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2669 * read entries in the constant pool. Since the old verifier always
2670 * works on a copy of the code, it will not see any rewriting that
2671 * may possibly occur in the middle of verification. So it is important
2672 * that nothing it calls tries to use the cpCache instead of the raw
2673 * constant pool, so we must use cp->uncached_x methods when appropriate.
2674 */
2675 JVM_ENTRY_PROF(const char*, JVM_GetCPFieldNameUTF, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2676 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2677 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2678 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2679 switch (cp->tag_at(cp_index).value()) {
2680 case JVM_CONSTANT_Fieldref:
2681 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2682 default:
2683 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2684 }
2685 ShouldNotReachHere();
2686 return nullptr;
2687 JVM_END
2688
2689
2690 JVM_ENTRY_PROF(const char*, JVM_GetCPMethodNameUTF, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2691 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2692 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2693 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2694 switch (cp->tag_at(cp_index).value()) {
2695 case JVM_CONSTANT_InterfaceMethodref:
2696 case JVM_CONSTANT_Methodref:
2697 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2698 default:
2699 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2700 }
2701 ShouldNotReachHere();
2702 return nullptr;
2703 JVM_END
2704
2705
2706 JVM_ENTRY_PROF(const char*, JVM_GetCPMethodSignatureUTF, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2707 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2708 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2709 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2710 switch (cp->tag_at(cp_index).value()) {
2711 case JVM_CONSTANT_InterfaceMethodref:
2712 case JVM_CONSTANT_Methodref:
2713 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2714 default:
2715 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2716 }
2717 ShouldNotReachHere();
2718 return nullptr;
2719 JVM_END
2720
2721
2722 JVM_ENTRY_PROF(const char*, JVM_GetCPFieldSignatureUTF, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2723 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2724 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2725 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2726 switch (cp->tag_at(cp_index).value()) {
2727 case JVM_CONSTANT_Fieldref:
2728 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2729 default:
2730 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2731 }
2732 ShouldNotReachHere();
2733 return nullptr;
2734 JVM_END
2735
2736
2737 JVM_ENTRY_PROF(const char*, JVM_GetCPClassNameUTF, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2738 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2739 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2740 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2741 Symbol* classname = cp->klass_name_at(cp_index);
2742 return classname->as_utf8();
2743 JVM_END
2744
2745
2746 JVM_ENTRY_PROF(const char*, JVM_GetCPFieldClassNameUTF, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2747 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2748 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2749 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2750 switch (cp->tag_at(cp_index).value()) {
2751 case JVM_CONSTANT_Fieldref: {
2752 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2753 Symbol* classname = cp->klass_name_at(class_index);
2754 return classname->as_utf8();
2755 }
2756 default:
2757 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2758 }
2759 ShouldNotReachHere();
2760 return nullptr;
2761 JVM_END
2762
2763
2764 JVM_ENTRY_PROF(const char*, JVM_GetCPMethodClassNameUTF, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2765 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2766 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2767 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2768 switch (cp->tag_at(cp_index).value()) {
2769 case JVM_CONSTANT_Methodref:
2770 case JVM_CONSTANT_InterfaceMethodref: {
2771 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2772 Symbol* classname = cp->klass_name_at(class_index);
2773 return classname->as_utf8();
2774 }
2775 default:
2776 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2777 }
2778 ShouldNotReachHere();
2779 return nullptr;
2780 JVM_END
2781
2782
2783 JVM_ENTRY_PROF(jint, JVM_GetCPFieldModifiers, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2784 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2785 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2786 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2787 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2788 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2789 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2790 switch (cp->tag_at(cp_index).value()) {
2791 case JVM_CONSTANT_Fieldref: {
2792 Symbol* name = cp->uncached_name_ref_at(cp_index);
2793 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2794 InstanceKlass* ik = InstanceKlass::cast(k_called);
2795 for (JavaFieldStream fs(ik); !fs.done(); fs.next()) {
2796 if (fs.name() == name && fs.signature() == signature) {
2797 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2798 }
2799 }
2800 return -1;
2801 }
2802 default:
2803 fatal("JVM_GetCPFieldModifiers: illegal constant");
2804 }
2805 ShouldNotReachHere();
2806 return 0;
2807 JVM_END
2808
2809
2810 JVM_ENTRY_PROF(jint, JVM_GetCPMethodModifiers, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2811 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2812 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2813 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2814 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2815 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2816 switch (cp->tag_at(cp_index).value()) {
2817 case JVM_CONSTANT_Methodref:
2818 case JVM_CONSTANT_InterfaceMethodref: {
2819 Symbol* name = cp->uncached_name_ref_at(cp_index);
2820 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2821 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2822 int methods_count = methods->length();
2823 for (int i = 0; i < methods_count; i++) {
2824 Method* method = methods->at(i);
2825 if (method->name() == name && method->signature() == signature) {
2826 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2827 }
2828 }
2829 return -1;
2830 }
2831 default:
2832 fatal("JVM_GetCPMethodModifiers: illegal constant");
2833 }
2834 ShouldNotReachHere();
2835 return 0;
2836 JVM_END
2837
2838
2839 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2840
2841 JVM_LEAF_PROF(void, JVM_ReleaseUTF, JVM_ReleaseUTF(const char *utf))
2842 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2843 JVM_END
2844
2845
2846 JVM_ENTRY_PROF(jboolean, JVM_IsSameClassPackage, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2847 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2848 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2849 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2850 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2851 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2852 JVM_END
2853
2854 // Printing support //////////////////////////////////////////////////
2855 extern "C" {
2856
2857 ATTRIBUTE_PRINTF(3, 0)
2858 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2859 // Reject count values that are negative signed values converted to
2860 // unsigned; see bug 4399518, 4417214
2861 if ((intptr_t)count <= 0) return -1;
2862
2863 int result = os::vsnprintf(str, count, fmt, args);
2864 if (result > 0 && (size_t)result >= count) {
2865 result = -1;
2866 }
2925 // In most of the JVM thread support functions we need to access the
2926 // thread through a ThreadsListHandle to prevent it from exiting and
2927 // being reclaimed while we try to operate on it. The exceptions to this
2928 // rule are when operating on the current thread, or if the monitor of
2929 // the target java.lang.Thread is locked at the Java level - in both
2930 // cases the target cannot exit.
2931
2932 static void thread_entry(JavaThread* thread, TRAPS) {
2933 HandleMark hm(THREAD);
2934 Handle obj(THREAD, thread->threadObj());
2935 JavaValue result(T_VOID);
2936 JavaCalls::call_virtual(&result,
2937 obj,
2938 vmClasses::Thread_klass(),
2939 vmSymbols::run_method_name(),
2940 vmSymbols::void_method_signature(),
2941 THREAD);
2942 }
2943
2944
2945 JVM_ENTRY_PROF(void, JVM_StartThread, JVM_StartThread(JNIEnv* env, jobject jthread))
2946 #if INCLUDE_CDS
2947 if (CDSConfig::is_dumping_classic_static_archive()) {
2948 // During java -Xshare:dump, if we allow multiple Java threads to
2949 // execute in parallel, symbols and classes may be loaded in
2950 // random orders which will make the resulting CDS archive
2951 // non-deterministic.
2952 //
2953 // Lucikly, during java -Xshare:dump, it's important to run only
2954 // the code in the main Java thread (which is NOT started here) that
2955 // creates the module graph, etc. It's safe to not start the other
2956 // threads which are launched by class static initializers
2957 // (ReferenceHandler, FinalizerThread and CleanerImpl).
2958 if (log_is_enabled(Info, cds)) {
2959 ResourceMark rm;
2960 oop t = JNIHandles::resolve_non_null(jthread);
2961 log_info(cds)("JVM_StartThread() ignored: %s", t->klass()->external_name());
2962 }
2963 return;
2964 }
2965 #endif
2966 JavaThread *native_thread = nullptr;
2967
3021 log_warning(os, thread)("Failed to start the native thread for java.lang.Thread \"%s\"",
3022 JavaThread::name_for(JNIHandles::resolve_non_null(jthread)));
3023 // No one should hold a reference to the 'native_thread'.
3024 native_thread->smr_delete();
3025 if (JvmtiExport::should_post_resource_exhausted()) {
3026 JvmtiExport::post_resource_exhausted(
3027 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
3028 os::native_thread_creation_failed_msg());
3029 }
3030 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
3031 os::native_thread_creation_failed_msg());
3032 }
3033
3034 JFR_ONLY(Jfr::on_java_thread_start(thread, native_thread);)
3035
3036 Thread::start(native_thread);
3037
3038 JVM_END
3039
3040
3041 JVM_ENTRY_PROF(void, JVM_SetThreadPriority, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
3042 ThreadsListHandle tlh(thread);
3043 oop java_thread = nullptr;
3044 JavaThread* receiver = nullptr;
3045 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, &java_thread);
3046 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
3047
3048 if (is_alive) {
3049 // jthread refers to a live JavaThread.
3050 Thread::set_priority(receiver, (ThreadPriority)prio);
3051 }
3052 // Implied else: If the JavaThread hasn't started yet, then the
3053 // priority set in the java.lang.Thread object above will be pushed
3054 // down when it does start.
3055 JVM_END
3056
3057
3058 JVM_LEAF_PROF(void, JVM_Yield, JVM_Yield(JNIEnv *env, jclass threadClass))
3059 if (os::dont_yield()) return;
3060 HOTSPOT_THREAD_YIELD();
3061 os::naked_yield();
3062 JVM_END
3063
3064 JVM_ENTRY_PROF(void, JVM_SleepNanos, JVM_SleepNanos(JNIEnv* env, jclass threadClass, jlong nanos))
3065 if (nanos < 0) {
3066 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "nanosecond timeout value out of range");
3067 }
3068
3069 if (thread->is_interrupted(true) && !HAS_PENDING_EXCEPTION) {
3070 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3071 }
3072
3073 // Save current thread state and restore it at the end of this block.
3074 // And set new thread state to SLEEPING.
3075 JavaThreadSleepState jtss(thread);
3076
3077 HOTSPOT_THREAD_SLEEP_BEGIN(nanos / NANOSECS_PER_MILLISEC);
3078
3079 if (nanos == 0) {
3080 os::naked_yield();
3081 } else {
3082 ThreadState old_state = thread->osthread()->get_state();
3083 thread->osthread()->set_state(SLEEPING);
3084 if (!thread->sleep_nanos(nanos)) { // interrupted
3085 // An asynchronous exception could have been thrown on
3086 // us while we were sleeping. We do not overwrite those.
3087 if (!HAS_PENDING_EXCEPTION) {
3088 HOTSPOT_THREAD_SLEEP_END(1);
3089
3090 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
3091 // to properly restore the thread state. That's likely wrong.
3092 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3093 }
3094 }
3095 thread->osthread()->set_state(old_state);
3096 }
3097 HOTSPOT_THREAD_SLEEP_END(0);
3098 JVM_END
3099
3100 JVM_ENTRY_PROF(jobject, JVM_CurrentCarrierThread, JVM_CurrentCarrierThread(JNIEnv* env, jclass threadClass))
3101 oop jthread = thread->threadObj();
3102 assert(jthread != nullptr, "no current carrier thread!");
3103 return JNIHandles::make_local(THREAD, jthread);
3104 JVM_END
3105
3106 JVM_ENTRY_PROF(jobject, JVM_CurrentThread, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
3107 oop theThread = thread->vthread();
3108 assert(theThread != (oop)nullptr, "no current thread!");
3109 return JNIHandles::make_local(THREAD, theThread);
3110 JVM_END
3111
3112 JVM_ENTRY_PROF(void, JVM_SetCurrentThread, JVM_SetCurrentThread(JNIEnv* env, jobject thisThread,
3113 jobject theThread))
3114 oop threadObj = JNIHandles::resolve(theThread);
3115 thread->set_vthread(threadObj);
3116 JFR_ONLY(Jfr::on_set_current_thread(thread, threadObj);)
3117 JVM_END
3118
3119 JVM_ENTRY_PROF(jlong, JVM_GetNextThreadIdOffset, JVM_GetNextThreadIdOffset(JNIEnv* env, jclass threadClass))
3120 return ThreadIdentifier::unsafe_offset();
3121 JVM_END
3122
3123 JVM_ENTRY_PROF(void, JVM_Interrupt, JVM_Interrupt(JNIEnv* env, jobject jthread))
3124 ThreadsListHandle tlh(thread);
3125 JavaThread* receiver = nullptr;
3126 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, nullptr);
3127 if (is_alive) {
3128 // jthread refers to a live JavaThread.
3129 receiver->interrupt();
3130 }
3131 JVM_END
3132
3133 // Return true iff the current thread has locked the object passed in
3134
3135 JVM_ENTRY_PROF(jboolean, JVM_HoldsLock, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3136 if (obj == nullptr) {
3137 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3138 }
3139 Handle h_obj(THREAD, JNIHandles::resolve(obj));
3140 return ObjectSynchronizer::current_thread_holds_lock(thread, h_obj);
3141 JVM_END
3142
3143 JVM_ENTRY_PROF(jobject, JVM_GetStackTrace, JVM_GetStackTrace(JNIEnv *env, jobject jthread))
3144 oop trace = java_lang_Thread::async_get_stack_trace(JNIHandles::resolve(jthread), THREAD);
3145 return JNIHandles::make_local(THREAD, trace);
3146 JVM_END
3147
3148 JVM_ENTRY_PROF(void, JVM_DumpAllStacks, JVM_DumpAllStacks(JNIEnv* env, jclass))
3149 VM_PrintThreads op;
3150 VMThread::execute(&op);
3151 if (JvmtiExport::should_post_data_dump()) {
3152 JvmtiExport::post_data_dump();
3153 }
3154 JVM_END
3155
3156 JVM_ENTRY_PROF(void, JVM_SetNativeThreadName, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3157 // We don't use a ThreadsListHandle here because the current thread
3158 // must be alive.
3159 oop java_thread = JNIHandles::resolve_non_null(jthread);
3160 JavaThread* thr = java_lang_Thread::thread(java_thread);
3161 if (thread == thr && !thr->has_attached_via_jni()) {
3162 // Thread naming is only supported for the current thread and
3163 // we don't set the name of an attached thread to avoid stepping
3164 // on other programs.
3165 ResourceMark rm(thread);
3166 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3167 os::set_native_thread_name(thread_name);
3168 }
3169 JVM_END
3170
3171 JVM_ENTRY_PROF(jobject, JVM_ScopedValueCache, JVM_ScopedValueCache(JNIEnv* env, jclass threadClass))
3172 oop theCache = thread->scopedValueCache();
3173 return JNIHandles::make_local(THREAD, theCache);
3174 JVM_END
3175
3176 JVM_ENTRY_PROF(void, JVM_SetScopedValueCache, JVM_SetScopedValueCache(JNIEnv* env, jclass threadClass,
3177 jobject theCache))
3178 arrayOop objs = arrayOop(JNIHandles::resolve(theCache));
3179 thread->set_scopedValueCache(objs);
3180 JVM_END
3181
3182 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3183
3184 JVM_ENTRY_PROF(jobjectArray, JVM_GetClassContext, JVM_GetClassContext(JNIEnv *env))
3185 ResourceMark rm(THREAD);
3186 JvmtiVMObjectAllocEventCollector oam;
3187 vframeStream vfst(thread);
3188
3189 if (vmClasses::reflect_CallerSensitive_klass() != nullptr) {
3190 // This must only be called from SecurityManager.getClassContext
3191 Method* m = vfst.method();
3192 if (!(m->method_holder() == vmClasses::SecurityManager_klass() &&
3193 m->name() == vmSymbols::getClassContext_name() &&
3194 m->signature() == vmSymbols::void_class_array_signature())) {
3195 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext");
3196 }
3197 }
3198
3199 // Collect method holders
3200 GrowableArray<Klass*>* klass_array = new GrowableArray<Klass*>();
3201 for (; !vfst.at_end(); vfst.security_next()) {
3202 Method* m = vfst.method();
3203 // Native frames are not returned
3204 if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) {
3205 Klass* holder = m->method_holder();
3206 assert(holder->is_klass(), "just checking");
3207 klass_array->append(holder);
3208 }
3209 }
3210
3211 // Create result array of type [Ljava/lang/Class;
3212 objArrayOop result = oopFactory::new_objArray(vmClasses::Class_klass(), klass_array->length(), CHECK_NULL);
3213 // Fill in mirrors corresponding to method holders
3214 for (int i = 0; i < klass_array->length(); i++) {
3215 result->obj_at_put(i, klass_array->at(i)->java_mirror());
3216 }
3217
3218 return (jobjectArray) JNIHandles::make_local(THREAD, result);
3219 JVM_END
3220
3221
3222 // java.lang.Package ////////////////////////////////////////////////////////////////
3223
3224
3225 JVM_ENTRY_PROF(jstring, JVM_GetSystemPackage, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3226 ResourceMark rm(THREAD);
3227 JvmtiVMObjectAllocEventCollector oam;
3228 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3229 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3230 return (jstring) JNIHandles::make_local(THREAD, result);
3231 JVM_END
3232
3233
3234 JVM_ENTRY_PROF(jobjectArray, JVM_GetSystemPackages, JVM_GetSystemPackages(JNIEnv *env))
3235 JvmtiVMObjectAllocEventCollector oam;
3236 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3237 return (jobjectArray) JNIHandles::make_local(THREAD, result);
3238 JVM_END
3239
3240
3241 // java.lang.ref.Reference ///////////////////////////////////////////////////////////////
3242
3243
3244 JVM_ENTRY_PROF(jobject, JVM_GetAndClearReferencePendingList, JVM_GetAndClearReferencePendingList(JNIEnv* env))
3245 MonitorLocker ml(Heap_lock);
3246 oop ref = Universe::reference_pending_list();
3247 if (ref != nullptr) {
3248 Universe::clear_reference_pending_list();
3249 }
3250 return JNIHandles::make_local(THREAD, ref);
3251 JVM_END
3252
3253 JVM_ENTRY_PROF(jboolean, JVM_HasReferencePendingList, JVM_HasReferencePendingList(JNIEnv* env))
3254 MonitorLocker ml(Heap_lock);
3255 return Universe::has_reference_pending_list();
3256 JVM_END
3257
3258 JVM_ENTRY_PROF(void, JVM_WaitForReferencePendingList, JVM_WaitForReferencePendingList(JNIEnv* env))
3259 MonitorLocker ml(Heap_lock);
3260 while (!Universe::has_reference_pending_list()) {
3261 ml.wait();
3262 }
3263 JVM_END
3264
3265 JVM_ENTRY_PROF(jboolean, JVM_ReferenceRefersTo, JVM_ReferenceRefersTo(JNIEnv* env, jobject ref, jobject o))
3266 oop ref_oop = JNIHandles::resolve_non_null(ref);
3267 // PhantomReference has it's own implementation of refersTo().
3268 // See: JVM_PhantomReferenceRefersTo
3269 assert(!java_lang_ref_Reference::is_phantom(ref_oop), "precondition");
3270 oop referent = java_lang_ref_Reference::weak_referent_no_keepalive(ref_oop);
3271 return referent == JNIHandles::resolve(o);
3272 JVM_END
3273
3274 JVM_ENTRY_PROF(void, JVM_ReferenceClear, JVM_ReferenceClear(JNIEnv* env, jobject ref))
3275 oop ref_oop = JNIHandles::resolve_non_null(ref);
3276 // FinalReference has it's own implementation of clear().
3277 assert(!java_lang_ref_Reference::is_final(ref_oop), "precondition");
3278 if (java_lang_ref_Reference::unknown_referent_no_keepalive(ref_oop) == nullptr) {
3279 // If the referent has already been cleared then done.
3280 // However, if the referent is dead but has not yet been cleared by
3281 // concurrent reference processing, it should NOT be cleared here.
3282 // Instead, clearing should be left to the GC. Clearing it here could
3283 // detectably lose an expected notification, which is impossible with
3284 // STW reference processing. The clearing in enqueue() doesn't have
3285 // this problem, since the enqueue covers the notification, but it's not
3286 // worth the effort to handle that case specially.
3287 return;
3288 }
3289 java_lang_ref_Reference::clear_referent(ref_oop);
3290 JVM_END
3291
3292
3293 // java.lang.ref.PhantomReference //////////////////////////////////////////////////
3294
3295
3296 JVM_ENTRY_PROF(jboolean, JVM_PhantomReferenceRefersTo, JVM_PhantomReferenceRefersTo(JNIEnv* env, jobject ref, jobject o))
3297 oop ref_oop = JNIHandles::resolve_non_null(ref);
3298 oop referent = java_lang_ref_Reference::phantom_referent_no_keepalive(ref_oop);
3299 return referent == JNIHandles::resolve(o);
3300 JVM_END
3301
3302
3303 // ObjectInputStream ///////////////////////////////////////////////////////////////
3304
3305 // Return the first user-defined class loader up the execution stack, or null
3306 // if only code from the bootstrap or platform class loader is on the stack.
3307
3308 JVM_ENTRY_PROF(jobject, JVM_LatestUserDefinedLoader, JVM_LatestUserDefinedLoader(JNIEnv *env))
3309 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3310 InstanceKlass* ik = vfst.method()->method_holder();
3311 oop loader = ik->class_loader();
3312 if (loader != nullptr && !SystemDictionary::is_platform_class_loader(loader)) {
3313 // Skip reflection related frames
3314 if (!ik->is_subclass_of(vmClasses::reflect_SerializationConstructorAccessorImpl_klass())) {
3315 return JNIHandles::make_local(THREAD, loader);
3316 }
3317 }
3318 }
3319 return nullptr;
3320 JVM_END
3321
3322
3323 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3324
3325
3326 // resolve array handle and check arguments
3327 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3328 if (arr == nullptr) {
3329 THROW_0(vmSymbols::java_lang_NullPointerException());
3330 }
3331 oop a = JNIHandles::resolve_non_null(arr);
3332 if (!a->is_array()) {
3333 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3334 } else if (type_array_only && !a->is_typeArray()) {
3335 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array of primitive type");
3336 }
3337 return arrayOop(a);
3338 }
3339
3340
3341 JVM_ENTRY_PROF(jint, JVM_GetArrayLength, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3342 arrayOop a = check_array(env, arr, false, CHECK_0);
3343 return a->length();
3344 JVM_END
3345
3346
3347 JVM_ENTRY_PROF(jobject, JVM_GetArrayElement, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3348 JvmtiVMObjectAllocEventCollector oam;
3349 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3350 jvalue value;
3351 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3352 oop box = Reflection::box(&value, type, CHECK_NULL);
3353 return JNIHandles::make_local(THREAD, box);
3354 JVM_END
3355
3356
3357 JVM_ENTRY_PROF(jvalue, JVM_GetPrimitiveArrayElement, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3358 jvalue value;
3359 value.i = 0; // to initialize value before getting used in CHECK
3360 arrayOop a = check_array(env, arr, true, CHECK_(value));
3361 assert(a->is_typeArray(), "just checking");
3362 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3363 BasicType wide_type = (BasicType) wCode;
3364 if (type != wide_type) {
3365 Reflection::widen(&value, type, wide_type, CHECK_(value));
3366 }
3367 return value;
3368 JVM_END
3369
3370
3371 JVM_ENTRY_PROF(void, JVM_SetArrayElement, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3372 arrayOop a = check_array(env, arr, false, CHECK);
3373 oop box = JNIHandles::resolve(val);
3374 jvalue value;
3375 value.i = 0; // to initialize value before getting used in CHECK
3376 BasicType value_type;
3377 if (a->is_objArray()) {
3378 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3379 value_type = Reflection::unbox_for_regular_object(box, &value);
3380 } else {
3381 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3382 }
3383 Reflection::array_set(&value, a, index, value_type, CHECK);
3384 JVM_END
3385
3386
3387 JVM_ENTRY_PROF(void, JVM_SetPrimitiveArrayElement, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3388 arrayOop a = check_array(env, arr, true, CHECK);
3389 assert(a->is_typeArray(), "just checking");
3390 BasicType value_type = (BasicType) vCode;
3391 Reflection::array_set(&v, a, index, value_type, CHECK);
3392 JVM_END
3393
3394
3395 JVM_ENTRY_PROF(jobject, JVM_NewArray, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3396 JvmtiVMObjectAllocEventCollector oam;
3397 oop element_mirror = JNIHandles::resolve(eltClass);
3398 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3399 return JNIHandles::make_local(THREAD, result);
3400 JVM_END
3401
3402
3403 JVM_ENTRY_PROF(jobject, JVM_NewMultiArray, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3404 JvmtiVMObjectAllocEventCollector oam;
3405 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3406 oop element_mirror = JNIHandles::resolve(eltClass);
3407 assert(dim_array->is_typeArray(), "just checking");
3408 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3409 return JNIHandles::make_local(THREAD, result);
3410 JVM_END
3411
3412
3413 // Library support ///////////////////////////////////////////////////////////////////////////
3414
3415 JVM_LEAF_PROF(void*, JVM_LoadZipLibrary, JVM_LoadZipLibrary())
3416 return ZipLibrary::handle();
3417 JVM_END
3418
3419 JVM_ENTRY_NO_ENV_PROF(void*, JVM_LoadLibrary, JVM_LoadLibrary(const char* name, jboolean throwException))
3420 //%note jvm_ct
3421 char ebuf[1024];
3422 void *load_result;
3423 {
3424 ThreadToNativeFromVM ttnfvm(thread);
3425 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3426 }
3427 if (load_result == nullptr) {
3428 if (throwException) {
3429 char msg[1024];
3430 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3431 // Since 'ebuf' may contain a string encoded using
3432 // platform encoding scheme, we need to pass
3433 // Exceptions::unsafe_to_utf8 to the new_exception method
3434 // as the last argument. See bug 6367357.
3435 Handle h_exception =
3436 Exceptions::new_exception(thread,
3437 vmSymbols::java_lang_UnsatisfiedLinkError(),
3438 msg, Exceptions::unsafe_to_utf8);
3439
3440 THROW_HANDLE_0(h_exception);
3441 } else {
3442 log_info(library)("Failed to load library %s", name);
3443 return load_result;
3444 }
3445 }
3446 log_info(library)("Loaded library %s, handle " INTPTR_FORMAT, name, p2i(load_result));
3447 return load_result;
3448 JVM_END
3449
3450
3451 JVM_LEAF_PROF(void, JVM_UnloadLibrary, JVM_UnloadLibrary(void* handle))
3452 os::dll_unload(handle);
3453 log_info(library)("Unloaded library with handle " INTPTR_FORMAT, p2i(handle));
3454 JVM_END
3455
3456
3457 JVM_LEAF_PROF(void*, JVM_FindLibraryEntry, JVM_FindLibraryEntry(void* handle, const char* name))
3458 void* find_result = os::dll_lookup(handle, name);
3459 log_info(library)("%s %s in library with handle " INTPTR_FORMAT,
3460 find_result != nullptr ? "Found" : "Failed to find",
3461 name, p2i(handle));
3462 return find_result;
3463 JVM_END
3464
3465
3466 // JNI version ///////////////////////////////////////////////////////////////////////////////
3467
3468 JVM_LEAF_PROF(jboolean, JVM_IsSupportedJNIVersion, JVM_IsSupportedJNIVersion(jint version))
3469 return Threads::is_supported_jni_version_including_1_1(version);
3470 JVM_END
3471
3472
3473 JVM_LEAF_PROF(jboolean, JVM_IsPreviewEnabled, JVM_IsPreviewEnabled(void))
3474 return Arguments::enable_preview() ? JNI_TRUE : JNI_FALSE;
3475 JVM_END
3476
3477 JVM_LEAF_PROF(jboolean, JVM_IsContinuationsSupported, JVM_IsContinuationsSupported(void))
3478 return VMContinuations ? JNI_TRUE : JNI_FALSE;
3479 JVM_END
3480
3481 JVM_LEAF_PROF(jboolean, JVM_IsForeignLinkerSupported, JVM_IsForeignLinkerSupported(void))
3482 return ForeignGlobals::is_foreign_linker_supported() ? JNI_TRUE : JNI_FALSE;
3483 JVM_END
3484
3485 // String support ///////////////////////////////////////////////////////////////////////////
3486
3487 JVM_ENTRY_PROF(jstring, JVM_InternString, JVM_InternString(JNIEnv *env, jstring str))
3488 JvmtiVMObjectAllocEventCollector oam;
3489 if (str == nullptr) return nullptr;
3490 oop string = JNIHandles::resolve_non_null(str);
3491 oop result = StringTable::intern(string, CHECK_NULL);
3492 return (jstring) JNIHandles::make_local(THREAD, result);
3493 JVM_END
3494
3495
3496 // VM Raw monitor support //////////////////////////////////////////////////////////////////////
3497
3498 // VM Raw monitors (not to be confused with JvmtiRawMonitors) are a simple mutual exclusion
3499 // lock (not actually monitors: no wait/notify) that is exported by the VM for use by JDK
3500 // library code. They may be used by JavaThreads and non-JavaThreads and do not participate
3501 // in the safepoint protocol, thread suspension, thread interruption, or anything of that
3502 // nature. JavaThreads will be "in native" when using this API from JDK code.
3503
3504
3505 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3506 VM_Exit::block_if_vm_exited();
3507 return new PlatformMutex();
3533 Handle loader, Handle protection_domain,
3534 jboolean throwError, TRAPS) {
3535 // Security Note:
3536 // The Java level wrapper will perform the necessary security check allowing
3537 // us to pass the null as the initiating class loader. The VM is responsible for
3538 // the checkPackageAccess relative to the initiating class loader via the
3539 // protection_domain. The protection_domain is passed as null by the java code
3540 // if there is no security manager in 3-arg Class.forName().
3541 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
3542
3543 // Check if we should initialize the class
3544 if (init && klass->is_instance_klass()) {
3545 klass->initialize(CHECK_NULL);
3546 }
3547 return (jclass) JNIHandles::make_local(THREAD, klass->java_mirror());
3548 }
3549
3550
3551 // Method ///////////////////////////////////////////////////////////////////////////////////////////
3552
3553 JVM_ENTRY_PROF(jobject, JVM_InvokeMethod, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
3554 Handle method_handle;
3555 if (thread->stack_overflow_state()->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
3556 method_handle = Handle(THREAD, JNIHandles::resolve(method));
3557 Handle receiver(THREAD, JNIHandles::resolve(obj));
3558 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3559 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
3560 jobject res = JNIHandles::make_local(THREAD, result);
3561 if (JvmtiExport::should_post_vm_object_alloc()) {
3562 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
3563 assert(ret_type != nullptr, "sanity check: ret_type oop must not be null!");
3564 if (java_lang_Class::is_primitive(ret_type)) {
3565 // Only for primitive type vm allocates memory for java object.
3566 // See box() method.
3567 JvmtiExport::post_vm_object_alloc(thread, result);
3568 }
3569 }
3570 return res;
3571 } else {
3572 THROW_0(vmSymbols::java_lang_StackOverflowError());
3573 }
3574 JVM_END
3575
3576
3577 JVM_ENTRY_PROF(jobject, JVM_NewInstanceFromConstructor, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
3578 oop constructor_mirror = JNIHandles::resolve(c);
3579 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3580 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
3581 jobject res = JNIHandles::make_local(THREAD, result);
3582 if (JvmtiExport::should_post_vm_object_alloc()) {
3583 JvmtiExport::post_vm_object_alloc(thread, result);
3584 }
3585 return res;
3586 JVM_END
3587
3588 JVM_ENTRY_PROF(void, JVM_InitializeFromArchive, JVM_InitializeFromArchive(JNIEnv* env, jclass cls))
3589 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
3590 assert(k->is_klass(), "just checking");
3591 HeapShared::initialize_from_archived_subgraph(THREAD, k);
3592 JVM_END
3593
3594 JVM_ENTRY_PROF(void, JVM_RegisterLambdaProxyClassForArchiving, JVM_RegisterLambdaProxyClassForArchiving(JNIEnv* env,
3595 jclass caller,
3596 jstring interfaceMethodName,
3597 jobject factoryType,
3598 jobject interfaceMethodType,
3599 jobject implementationMember,
3600 jobject dynamicMethodType,
3601 jclass lambdaProxyClass))
3602 #if INCLUDE_CDS
3603 if (!CDSConfig::is_dumping_archive()) {
3604 return;
3605 }
3606
3607 Klass* caller_k = java_lang_Class::as_Klass(JNIHandles::resolve(caller));
3608 InstanceKlass* caller_ik = InstanceKlass::cast(caller_k);
3609 if (caller_ik->is_hidden()) {
3610 // Hidden classes not of type lambda proxy classes are currently not being archived.
3611 // If the caller_ik is of one of the above types, the corresponding lambda proxy class won't be
3612 // registered for archiving.
3613 return;
3614 }
3622 interface_method_name = java_lang_String::as_symbol(JNIHandles::resolve_non_null(interfaceMethodName));
3623 }
3624 Handle factory_type_oop(THREAD, JNIHandles::resolve_non_null(factoryType));
3625 Symbol* factory_type = java_lang_invoke_MethodType::as_signature(factory_type_oop(), true);
3626
3627 Handle interface_method_type_oop(THREAD, JNIHandles::resolve_non_null(interfaceMethodType));
3628 Symbol* interface_method_type = java_lang_invoke_MethodType::as_signature(interface_method_type_oop(), true);
3629
3630 Handle implementation_member_oop(THREAD, JNIHandles::resolve_non_null(implementationMember));
3631 assert(java_lang_invoke_MemberName::is_method(implementation_member_oop()), "must be");
3632 Method* m = java_lang_invoke_MemberName::vmtarget(implementation_member_oop());
3633
3634 Handle dynamic_method_type_oop(THREAD, JNIHandles::resolve_non_null(dynamicMethodType));
3635 Symbol* dynamic_method_type = java_lang_invoke_MethodType::as_signature(dynamic_method_type_oop(), true);
3636
3637 SystemDictionaryShared::add_lambda_proxy_class(caller_ik, lambda_ik, interface_method_name, factory_type,
3638 interface_method_type, m, dynamic_method_type, THREAD);
3639 #endif // INCLUDE_CDS
3640 JVM_END
3641
3642 JVM_ENTRY_PROF(jclass, JVM_LookupLambdaProxyClassFromArchive, JVM_LookupLambdaProxyClassFromArchive(JNIEnv* env,
3643 jclass caller,
3644 jstring interfaceMethodName,
3645 jobject factoryType,
3646 jobject interfaceMethodType,
3647 jobject implementationMember,
3648 jobject dynamicMethodType))
3649 #if INCLUDE_CDS
3650
3651 if (interfaceMethodName == nullptr || factoryType == nullptr || interfaceMethodType == nullptr ||
3652 implementationMember == nullptr || dynamicMethodType == nullptr) {
3653 THROW_(vmSymbols::java_lang_NullPointerException(), nullptr);
3654 }
3655
3656 Klass* caller_k = java_lang_Class::as_Klass(JNIHandles::resolve(caller));
3657 InstanceKlass* caller_ik = InstanceKlass::cast(caller_k);
3658 if (!caller_ik->is_shared()) {
3659 // there won't be a shared lambda class if the caller_ik is not in the shared archive.
3660 return nullptr;
3661 }
3662
3670 Handle implementation_member_oop(THREAD, JNIHandles::resolve_non_null(implementationMember));
3671 assert(java_lang_invoke_MemberName::is_method(implementation_member_oop()), "must be");
3672 Method* m = java_lang_invoke_MemberName::vmtarget(implementation_member_oop());
3673
3674 Handle dynamic_method_type_oop(THREAD, JNIHandles::resolve_non_null(dynamicMethodType));
3675 Symbol* dynamic_method_type = java_lang_invoke_MethodType::as_signature(dynamic_method_type_oop(), true);
3676
3677 InstanceKlass* lambda_ik = SystemDictionaryShared::get_shared_lambda_proxy_class(caller_ik, interface_method_name, factory_type,
3678 interface_method_type, m, dynamic_method_type);
3679 jclass jcls = nullptr;
3680 if (lambda_ik != nullptr) {
3681 InstanceKlass* loaded_lambda = SystemDictionaryShared::prepare_shared_lambda_proxy_class(lambda_ik, caller_ik, THREAD);
3682 jcls = loaded_lambda == nullptr ? nullptr : (jclass) JNIHandles::make_local(THREAD, loaded_lambda->java_mirror());
3683 }
3684 return jcls;
3685 #else
3686 return nullptr;
3687 #endif // INCLUDE_CDS
3688 JVM_END
3689
3690 JVM_ENTRY_NO_ENV_PROF(jlong, JVM_GetRandomSeedForDumping, JVM_GetRandomSeedForDumping())
3691 if (CDSConfig::is_dumping_static_archive()) {
3692 // We do this so that the default CDS archive can be deterministic.
3693 const char* release = VM_Version::vm_release();
3694 const char* dbg_level = VM_Version::jdk_debug_level();
3695 const char* version = VM_Version::internal_vm_info_string();
3696 jlong seed = (jlong)(java_lang_String::hash_code((const jbyte*)release, (int)strlen(release)) ^
3697 java_lang_String::hash_code((const jbyte*)dbg_level, (int)strlen(dbg_level)) ^
3698 java_lang_String::hash_code((const jbyte*)version, (int)strlen(version)));
3699 seed += (jlong)VM_Version::vm_major_version();
3700 seed += (jlong)VM_Version::vm_minor_version();
3701 seed += (jlong)VM_Version::vm_security_version();
3702 seed += (jlong)VM_Version::vm_patch_version();
3703 if (seed == 0) { // don't let this ever be zero.
3704 seed = 0x87654321;
3705 }
3706 log_debug(cds)("JVM_GetRandomSeedForDumping() = " JLONG_FORMAT, seed);
3707 return seed;
3708 } else {
3709 return 0;
3710 }
3711 JVM_END
3712
3713 JVM_ENTRY_NO_ENV_PROF(jint, JVM_GetCDSConfigStatus, JVM_GetCDSConfigStatus())
3714 return CDSConfig::get_status();
3715 JVM_END
3716
3717 JVM_ENTRY_PROF(void, JVM_LogLambdaFormInvoker, JVM_LogLambdaFormInvoker(JNIEnv *env, jstring line))
3718 #if INCLUDE_CDS
3719 assert(CDSConfig::is_logging_lambda_form_invokers(), "sanity");
3720 if (line != nullptr) {
3721 ResourceMark rm(THREAD);
3722 Handle h_line (THREAD, JNIHandles::resolve_non_null(line));
3723 char* c_line = java_lang_String::as_utf8_string(h_line());
3724 if (CDSConfig::is_dumping_dynamic_archive() || CDSConfig::is_dumping_preimage_static_archive()) {
3725 // Note: LambdaFormInvokers::append take same format which is not
3726 // same as below the print format. The line does not include LAMBDA_FORM_TAG.
3727 LambdaFormInvokers::append(os::strdup((const char*)c_line, mtInternal));
3728 }
3729 if (ClassListWriter::is_enabled()) {
3730 ClassListWriter w;
3731 w.stream()->print_cr("%s %s", ClassListParser::lambda_form_tag(), c_line);
3732 }
3733 }
3734 #endif // INCLUDE_CDS
3735 JVM_END
3736
3737 JVM_ENTRY_PROF(void, JVM_LogDynamicProxy, JVM_LogDynamicProxy(JNIEnv *env, jobject loader, jstring proxy_name, jobjectArray interfaces, jint access_flags))
3738 #if INCLUDE_CDS
3739 assert(CDSConfig::is_tracing_dynamic_proxy(), "sanity");
3740
3741 ResourceMark rm(THREAD);
3742 oop proxy_name_oop = JNIHandles::resolve_non_null(proxy_name);
3743 char* proxy_name_str = java_lang_String::as_utf8_string(proxy_name_oop);
3744 oop loader_oop = JNIHandles::resolve(loader);
3745 objArrayOop interfaces_oop = objArrayOop(JNIHandles::resolve_non_null(interfaces));
3746
3747 ClassPrelinker::trace_dynamic_proxy_class(loader_oop, proxy_name_str, interfaces_oop, access_flags);
3748 #endif // INCLUDE_CDS
3749 JVM_END
3750
3751 JVM_ENTRY_PROF(void, JVM_DumpClassListToFile, JVM_DumpClassListToFile(JNIEnv *env, jstring listFileName))
3752 #if INCLUDE_CDS
3753 ResourceMark rm(THREAD);
3754 Handle file_handle(THREAD, JNIHandles::resolve_non_null(listFileName));
3755 char* file_name = java_lang_String::as_utf8_string(file_handle());
3756 MetaspaceShared::dump_loaded_classes(file_name, THREAD);
3757 #endif // INCLUDE_CDS
3758 JVM_END
3759
3760 JVM_ENTRY_PROF(void, JVM_DumpDynamicArchive, JVM_DumpDynamicArchive(JNIEnv *env, jstring archiveName))
3761 #if INCLUDE_CDS
3762 ResourceMark rm(THREAD);
3763 Handle file_handle(THREAD, JNIHandles::resolve_non_null(archiveName));
3764 char* archive_name = java_lang_String::as_utf8_string(file_handle());
3765 DynamicArchive::dump_for_jcmd(archive_name, CHECK);
3766 #endif // INCLUDE_CDS
3767 JVM_END
3768
3769 // Returns an array of all live Thread objects (VM internal JavaThreads,
3770 // jvmti agent threads, and JNI attaching threads are skipped)
3771 // See CR 6404306 regarding JNI attaching threads
3772 JVM_ENTRY_PROF(jobjectArray, JVM_GetAllThreads, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
3773 ResourceMark rm(THREAD);
3774 ThreadsListEnumerator tle(THREAD, false, false);
3775 JvmtiVMObjectAllocEventCollector oam;
3776
3777 int num_threads = tle.num_threads();
3778 objArrayOop r = oopFactory::new_objArray(vmClasses::Thread_klass(), num_threads, CHECK_NULL);
3779 objArrayHandle threads_ah(THREAD, r);
3780
3781 for (int i = 0; i < num_threads; i++) {
3782 Handle h = tle.get_threadObj(i);
3783 threads_ah->obj_at_put(i, h());
3784 }
3785
3786 return (jobjectArray) JNIHandles::make_local(THREAD, threads_ah());
3787 JVM_END
3788
3789
3790 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
3791 // Return StackTraceElement[][], each element is the stack trace of a thread in
3792 // the corresponding entry in the given threads array
3793 JVM_ENTRY_PROF(jobjectArray, JVM_DumpThreads, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
3794 JvmtiVMObjectAllocEventCollector oam;
3795
3796 // Check if threads is null
3797 if (threads == nullptr) {
3798 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
3799 }
3800
3801 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
3802 objArrayHandle ah(THREAD, a);
3803 int num_threads = ah->length();
3804 // check if threads is non-empty array
3805 if (num_threads == 0) {
3806 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
3807 }
3808
3809 // check if threads is not an array of objects of Thread class
3810 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
3811 if (k != vmClasses::Thread_klass()) {
3812 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
3813 }
3814
3815 ResourceMark rm(THREAD);
3816
3817 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
3818 for (int i = 0; i < num_threads; i++) {
3819 oop thread_obj = ah->obj_at(i);
3820 instanceHandle h(THREAD, (instanceOop) thread_obj);
3821 thread_handle_array->append(h);
3822 }
3823
3824 // The JavaThread references in thread_handle_array are validated
3825 // in VM_ThreadDump::doit().
3826 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
3827 return (jobjectArray)JNIHandles::make_local(THREAD, stacktraces());
3828
3829 JVM_END
3830
3831 // JVM monitoring and management support
3832 JVM_LEAF_PROF(void*, JVM_GetManagement, JVM_GetManagement(jint version))
3833 return Management::get_jmm_interface(version);
3834 JVM_END
3835
3836 // com.sun.tools.attach.VirtualMachine agent properties support
3837 //
3838 // Initialize the agent properties with the properties maintained in the VM
3839 JVM_ENTRY_PROF(jobject, JVM_InitAgentProperties, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
3840 ResourceMark rm;
3841
3842 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
3843
3844 PUTPROP(props, "sun.java.command", Arguments::java_command());
3845 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
3846 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
3847 return properties;
3848 JVM_END
3849
3850 JVM_ENTRY_PROF(jobjectArray, JVM_GetEnclosingMethodInfo, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
3851 {
3852 JvmtiVMObjectAllocEventCollector oam;
3853
3854 if (ofClass == nullptr) {
3855 return nullptr;
3856 }
3857 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
3858 // Special handling for primitive objects
3859 if (java_lang_Class::is_primitive(mirror())) {
3860 return nullptr;
3861 }
3862 Klass* k = java_lang_Class::as_Klass(mirror());
3863 if (!k->is_instance_klass()) {
3864 return nullptr;
3865 }
3866 InstanceKlass* ik = InstanceKlass::cast(k);
3867 int encl_method_class_idx = ik->enclosing_method_class_index();
3868 if (encl_method_class_idx == 0) {
3869 return nullptr;
3870 }
3873 Klass* enc_k = ik->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
3874 dest->obj_at_put(0, enc_k->java_mirror());
3875 int encl_method_method_idx = ik->enclosing_method_method_index();
3876 if (encl_method_method_idx != 0) {
3877 Symbol* sym = ik->constants()->symbol_at(
3878 extract_low_short_from_int(
3879 ik->constants()->name_and_type_at(encl_method_method_idx)));
3880 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3881 dest->obj_at_put(1, str());
3882 sym = ik->constants()->symbol_at(
3883 extract_high_short_from_int(
3884 ik->constants()->name_and_type_at(encl_method_method_idx)));
3885 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3886 dest->obj_at_put(2, str());
3887 }
3888 return (jobjectArray) JNIHandles::make_local(THREAD, dest());
3889 }
3890 JVM_END
3891
3892 // Returns an array of java.lang.String objects containing the input arguments to the VM.
3893 JVM_ENTRY_PROF(jobjectArray, JVM_GetVmArguments, JVM_GetVmArguments(JNIEnv *env))
3894 ResourceMark rm(THREAD);
3895
3896 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) {
3897 return nullptr;
3898 }
3899
3900 char** vm_flags = Arguments::jvm_flags_array();
3901 char** vm_args = Arguments::jvm_args_array();
3902 int num_flags = Arguments::num_jvm_flags();
3903 int num_args = Arguments::num_jvm_args();
3904
3905 InstanceKlass* ik = vmClasses::String_klass();
3906 objArrayOop r = oopFactory::new_objArray(ik, num_args + num_flags, CHECK_NULL);
3907 objArrayHandle result_h(THREAD, r);
3908
3909 int index = 0;
3910 for (int j = 0; j < num_flags; j++, index++) {
3911 Handle h = java_lang_String::create_from_platform_dependent_str(vm_flags[j], CHECK_NULL);
3912 result_h->obj_at_put(index, h());
3913 }
3914 for (int i = 0; i < num_args; i++, index++) {
3915 Handle h = java_lang_String::create_from_platform_dependent_str(vm_args[i], CHECK_NULL);
3916 result_h->obj_at_put(index, h());
3917 }
3918 return (jobjectArray) JNIHandles::make_local(THREAD, result_h());
3919 JVM_END
3920
3921 JVM_LEAF_PROF(jint, JVM_FindSignal, JVM_FindSignal(const char *name))
3922 return os::get_signal_number(name);
3923 JVM_END
3924
3925 JVM_ENTRY_PROF(void, JVM_VirtualThreadStart, JVM_VirtualThreadStart(JNIEnv* env, jobject vthread))
3926 #if INCLUDE_JVMTI
3927 if (!DoJVMTIVirtualThreadTransitions) {
3928 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
3929 return;
3930 }
3931 if (JvmtiVTMSTransitionDisabler::VTMS_notify_jvmti_events()) {
3932 JvmtiVTMSTransitionDisabler::VTMS_vthread_start(vthread);
3933 } else {
3934 // set VTMS transition bit value in JavaThread and java.lang.VirtualThread object
3935 JvmtiVTMSTransitionDisabler::set_is_in_VTMS_transition(thread, vthread, false);
3936 }
3937 #endif
3938 JVM_END
3939
3940 JVM_ENTRY_PROF(void, JVM_VirtualThreadEnd, JVM_VirtualThreadEnd(JNIEnv* env, jobject vthread))
3941 #if INCLUDE_JVMTI
3942 if (!DoJVMTIVirtualThreadTransitions) {
3943 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
3944 return;
3945 }
3946 if (JvmtiVTMSTransitionDisabler::VTMS_notify_jvmti_events()) {
3947 JvmtiVTMSTransitionDisabler::VTMS_vthread_end(vthread);
3948 } else {
3949 // set VTMS transition bit value in JavaThread and java.lang.VirtualThread object
3950 JvmtiVTMSTransitionDisabler::set_is_in_VTMS_transition(thread, vthread, true);
3951 }
3952 #endif
3953 JVM_END
3954
3955 // If notifications are disabled then just update the VTMS transition bit and return.
3956 // Otherwise, the bit is updated in the given jvmtiVTMSTransitionDisabler function call.
3957 JVM_ENTRY_PROF(void, JVM_VirtualThreadMount, JVM_VirtualThreadMount(JNIEnv* env, jobject vthread, jboolean hide))
3958 #if INCLUDE_JVMTI
3959 if (!DoJVMTIVirtualThreadTransitions) {
3960 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
3961 return;
3962 }
3963 if (JvmtiVTMSTransitionDisabler::VTMS_notify_jvmti_events()) {
3964 JvmtiVTMSTransitionDisabler::VTMS_vthread_mount(vthread, hide);
3965 } else {
3966 // set VTMS transition bit value in JavaThread and java.lang.VirtualThread object
3967 JvmtiVTMSTransitionDisabler::set_is_in_VTMS_transition(thread, vthread, hide);
3968 }
3969 #endif
3970 JVM_END
3971
3972 // If notifications are disabled then just update the VTMS transition bit and return.
3973 // Otherwise, the bit is updated in the given jvmtiVTMSTransitionDisabler function call below.
3974 JVM_ENTRY_PROF(void, JVM_VirtualThreadUnmount, JVM_VirtualThreadUnmount(JNIEnv* env, jobject vthread, jboolean hide))
3975 #if INCLUDE_JVMTI
3976 if (!DoJVMTIVirtualThreadTransitions) {
3977 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
3978 return;
3979 }
3980 if (JvmtiVTMSTransitionDisabler::VTMS_notify_jvmti_events()) {
3981 JvmtiVTMSTransitionDisabler::VTMS_vthread_unmount(vthread, hide);
3982 } else {
3983 // set VTMS transition bit value in JavaThread and java.lang.VirtualThread object
3984 JvmtiVTMSTransitionDisabler::set_is_in_VTMS_transition(thread, vthread, hide);
3985 }
3986 #endif
3987 JVM_END
3988
3989 // Always update the temporary VTMS transition bit.
3990 JVM_ENTRY_PROF(void, JVM_VirtualThreadHideFrames, JVM_VirtualThreadHideFrames(JNIEnv* env, jclass clazz, jboolean hide))
3991 #if INCLUDE_JVMTI
3992 if (!DoJVMTIVirtualThreadTransitions) {
3993 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
3994 return;
3995 }
3996 assert(!thread->is_in_VTMS_transition(), "sanity check");
3997 assert(thread->is_in_tmp_VTMS_transition() != (bool)hide, "sanity check");
3998 thread->toggle_is_in_tmp_VTMS_transition();
3999 #endif
4000 JVM_END
4001
4002 // Notification from VirtualThread about disabling JVMTI Suspend in a sync critical section.
4003 // Needed to avoid deadlocks with JVMTI suspend mechanism.
4004 JVM_ENTRY(void, JVM_VirtualThreadDisableSuspend(JNIEnv* env, jclass clazz, jboolean enter))
4005 #if INCLUDE_JVMTI
4006 if (!DoJVMTIVirtualThreadTransitions) {
4007 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
4008 return;
4009 }
4010 assert(thread->is_disable_suspend() != (bool)enter,
4011 "nested or unbalanced monitor enter/exit is not allowed");
4012 thread->toggle_is_disable_suspend();
4013 #endif
4014 JVM_END
4015
4016 /*
4017 * Return the current class's class file version. The low order 16 bits of the
4018 * returned jint contain the class's major version. The high order 16 bits
4019 * contain the class's minor version.
4020 */
4021 JVM_ENTRY_PROF(jint, JVM_GetClassFileVersion, JVM_GetClassFileVersion(JNIEnv* env, jclass current))
4022 oop mirror = JNIHandles::resolve_non_null(current);
4023 if (java_lang_Class::is_primitive(mirror)) {
4024 // return latest major version and minor version of 0.
4025 return JVM_CLASSFILE_MAJOR_VERSION;
4026 }
4027 assert(!java_lang_Class::as_Klass(mirror)->is_array_klass(), "unexpected array class");
4028
4029 Klass* c = java_lang_Class::as_Klass(mirror);
4030 assert(c->is_instance_klass(), "must be");
4031 InstanceKlass* ik = InstanceKlass::cast(c);
4032 return (ik->minor_version() << 16) | ik->major_version();
4033 JVM_END
4034
4035 /*
4036 * Ensure that code doing a stackwalk and using javaVFrame::locals() to
4037 * get the value will see a materialized value and not a scalar-replaced
4038 * null value.
4039 */
4040 JVM_ENTRY_PROF(void, JVM_EnsureMaterializedForStackWalk_func, JVM_EnsureMaterializedForStackWalk_func(JNIEnv* env, jobject vthread, jobject value))
4041 JVM_EnsureMaterializedForStackWalk(env, value);
4042 JVM_END
4043
4044 /*
4045 * Return JNI_TRUE if warnings are printed when agents are dynamically loaded.
4046 */
4047 JVM_LEAF_PROF(jboolean, JVM_PrintWarningAtDynamicAgentLoad, JVM_PrintWarningAtDynamicAgentLoad(void))
4048 return (EnableDynamicAgentLoading && !FLAG_IS_CMDLINE(EnableDynamicAgentLoading)) ? JNI_TRUE : JNI_FALSE;
4049 JVM_END
4050
4051 #define DO_COUNTERS(macro) \
4052 macro(JVM_CurrentTimeMillis) \
4053 macro(JVM_NanoTime) \
4054 macro(JVM_GetNanoTimeAdjustment) \
4055 macro(JVM_ArrayCopy) \
4056 macro(JVM_GetProperties) \
4057 macro(JVM_GetTemporaryDirectory) \
4058 macro(JVM_BeforeHalt) \
4059 macro(JVM_Halt) \
4060 macro(JVM_GC) \
4061 macro(JVM_MaxObjectInspectionAge) \
4062 macro(JVM_TotalMemory) \
4063 macro(JVM_FreeMemory) \
4064 macro(JVM_MaxMemory) \
4065 macro(JVM_ActiveProcessorCount) \
4066 macro(JVM_IsUseContainerSupport) \
4067 macro(JVM_FillInStackTrace) \
4068 macro(JVM_GetExtendedNPEMessage) \
4069 macro(JVM_InitStackTraceElementArray) \
4070 macro(JVM_InitStackTraceElement) \
4071 macro(JVM_ExpandStackFrameInfo) \
4072 macro(JVM_CallStackWalk) \
4073 macro(JVM_MoreStackWalk) \
4074 macro(JVM_SetStackWalkContinuation) \
4075 macro(JVM_IHashCode) \
4076 macro(JVM_MonitorWait) \
4077 macro(JVM_MonitorNotify) \
4078 macro(JVM_MonitorNotifyAll) \
4079 macro(JVM_Clone) \
4080 macro(JVM_ReportFinalizationComplete) \
4081 macro(JVM_IsFinalizationEnabled) \
4082 macro(JVM_RegisterContinuationMethods) \
4083 macro(JVM_NativePath) \
4084 macro(JVM_GetCallerClass) \
4085 macro(JVM_FindPrimitiveClass) \
4086 macro(JVM_FindClassFromBootLoader) \
4087 macro(JVM_FindClassFromCaller) \
4088 macro(JVM_FindClassFromClass) \
4089 macro(JVM_DefineClass) \
4090 macro(JVM_LookupDefineClass) \
4091 macro(JVM_DefineClassWithSource) \
4092 macro(JVM_FindLoadedClass) \
4093 macro(JVM_DefineModule) \
4094 macro(JVM_SetBootLoaderUnnamedModule) \
4095 macro(JVM_AddModuleExports) \
4096 macro(JVM_AddModuleExportsToAllUnnamed) \
4097 macro(JVM_AddModuleExportsToAll) \
4098 macro(JVM_AddReadsModule) \
4099 macro(JVM_DefineArchivedModules) \
4100 macro(JVM_InitClassName) \
4101 macro(JVM_GetClassInterfaces) \
4102 macro(JVM_IsInterface) \
4103 macro(JVM_IsHiddenClass) \
4104 macro(JVM_GetClassSigners) \
4105 macro(JVM_SetClassSigners) \
4106 macro(JVM_GetProtectionDomain) \
4107 macro(JVM_GetInheritedAccessControlContext) \
4108 macro(JVM_GetStackAccessControlContext) \
4109 macro(JVM_FindScopedValueBindings) \
4110 macro(JVM_IsArrayClass) \
4111 macro(JVM_IsPrimitiveClass) \
4112 macro(JVM_GetClassModifiers) \
4113 macro(JVM_GetDeclaredClasses) \
4114 macro(JVM_GetDeclaringClass) \
4115 macro(JVM_GetSimpleBinaryName) \
4116 macro(JVM_GetClassSignature) \
4117 macro(JVM_GetClassAnnotations) \
4118 macro(JVM_GetClassTypeAnnotations) \
4119 macro(JVM_GetMethodTypeAnnotations) \
4120 macro(JVM_GetFieldTypeAnnotations) \
4121 macro(JVM_GetMethodParameters) \
4122 macro(JVM_GetClassDeclaredFields) \
4123 macro(JVM_IsRecord) \
4124 macro(JVM_GetRecordComponents) \
4125 macro(JVM_GetClassDeclaredMethods) \
4126 macro(JVM_GetClassDeclaredConstructors) \
4127 macro(JVM_GetClassAccessFlags) \
4128 macro(JVM_AreNestMates) \
4129 macro(JVM_GetNestHost) \
4130 macro(JVM_GetNestMembers) \
4131 macro(JVM_GetPermittedSubclasses) \
4132 macro(JVM_GetClassConstantPool) \
4133 macro(JVM_ConstantPoolGetSize) \
4134 macro(JVM_ConstantPoolGetClassAt) \
4135 macro(JVM_ConstantPoolGetClassAtIfLoaded) \
4136 macro(JVM_ConstantPoolGetMethodAt) \
4137 macro(JVM_ConstantPoolGetMethodAtIfLoaded) \
4138 macro(JVM_ConstantPoolGetFieldAt) \
4139 macro(JVM_ConstantPoolGetFieldAtIfLoaded) \
4140 macro(JVM_ConstantPoolGetMemberRefInfoAt) \
4141 macro(JVM_ConstantPoolGetClassRefIndexAt) \
4142 macro(JVM_ConstantPoolGetNameAndTypeRefIndexAt) \
4143 macro(JVM_ConstantPoolGetNameAndTypeRefInfoAt) \
4144 macro(JVM_ConstantPoolGetIntAt) \
4145 macro(JVM_ConstantPoolGetLongAt) \
4146 macro(JVM_ConstantPoolGetFloatAt) \
4147 macro(JVM_ConstantPoolGetDoubleAt) \
4148 macro(JVM_ConstantPoolGetStringAt) \
4149 macro(JVM_ConstantPoolGetUTF8At) \
4150 macro(JVM_ConstantPoolGetTagAt) \
4151 macro(JVM_DesiredAssertionStatus) \
4152 macro(JVM_AssertionStatusDirectives) \
4153 macro(JVM_GetClassNameUTF) \
4154 macro(JVM_GetClassCPTypes) \
4155 macro(JVM_GetClassCPEntriesCount) \
4156 macro(JVM_GetClassFieldsCount) \
4157 macro(JVM_GetClassMethodsCount) \
4158 macro(JVM_GetMethodIxExceptionIndexes) \
4159 macro(JVM_GetMethodIxExceptionsCount) \
4160 macro(JVM_GetMethodIxByteCode) \
4161 macro(JVM_GetMethodIxByteCodeLength) \
4162 macro(JVM_GetMethodIxExceptionTableEntry) \
4163 macro(JVM_GetMethodIxExceptionTableLength) \
4164 macro(JVM_GetMethodIxModifiers) \
4165 macro(JVM_GetFieldIxModifiers) \
4166 macro(JVM_GetMethodIxLocalsCount) \
4167 macro(JVM_GetMethodIxArgsSize) \
4168 macro(JVM_GetMethodIxMaxStack) \
4169 macro(JVM_IsConstructorIx) \
4170 macro(JVM_IsVMGeneratedMethodIx) \
4171 macro(JVM_GetMethodIxNameUTF) \
4172 macro(JVM_GetMethodIxSignatureUTF) \
4173 macro(JVM_GetCPFieldNameUTF) \
4174 macro(JVM_GetCPMethodNameUTF) \
4175 macro(JVM_GetCPMethodSignatureUTF) \
4176 macro(JVM_GetCPFieldSignatureUTF) \
4177 macro(JVM_GetCPClassNameUTF) \
4178 macro(JVM_GetCPFieldClassNameUTF) \
4179 macro(JVM_GetCPMethodClassNameUTF) \
4180 macro(JVM_GetCPFieldModifiers) \
4181 macro(JVM_GetCPMethodModifiers) \
4182 macro(JVM_ReleaseUTF) \
4183 macro(JVM_IsSameClassPackage) \
4184 macro(JVM_StartThread) \
4185 macro(JVM_SetThreadPriority) \
4186 macro(JVM_Yield) \
4187 macro(JVM_SleepNanos) \
4188 macro(JVM_CurrentCarrierThread) \
4189 macro(JVM_CurrentThread) \
4190 macro(JVM_SetCurrentThread) \
4191 macro(JVM_GetNextThreadIdOffset) \
4192 macro(JVM_Interrupt) \
4193 macro(JVM_HoldsLock) \
4194 macro(JVM_GetStackTrace) \
4195 macro(JVM_DumpAllStacks) \
4196 macro(JVM_SetNativeThreadName) \
4197 macro(JVM_ScopedValueCache) \
4198 macro(JVM_SetScopedValueCache) \
4199 macro(JVM_GetClassContext) \
4200 macro(JVM_GetSystemPackage) \
4201 macro(JVM_GetSystemPackages) \
4202 macro(JVM_GetAndClearReferencePendingList) \
4203 macro(JVM_HasReferencePendingList) \
4204 macro(JVM_WaitForReferencePendingList) \
4205 macro(JVM_ReferenceRefersTo) \
4206 macro(JVM_ReferenceClear) \
4207 macro(JVM_PhantomReferenceRefersTo) \
4208 macro(JVM_LatestUserDefinedLoader) \
4209 macro(JVM_GetArrayLength) \
4210 macro(JVM_GetArrayElement) \
4211 macro(JVM_GetPrimitiveArrayElement) \
4212 macro(JVM_SetArrayElement) \
4213 macro(JVM_SetPrimitiveArrayElement) \
4214 macro(JVM_NewArray) \
4215 macro(JVM_NewMultiArray) \
4216 macro(JVM_LoadZipLibrary) \
4217 macro(JVM_LoadLibrary) \
4218 macro(JVM_UnloadLibrary) \
4219 macro(JVM_FindLibraryEntry) \
4220 macro(JVM_IsSupportedJNIVersion) \
4221 macro(JVM_IsPreviewEnabled) \
4222 macro(JVM_IsContinuationsSupported) \
4223 macro(JVM_IsForeignLinkerSupported) \
4224 macro(JVM_InternString) \
4225 macro(JVM_InvokeMethod) \
4226 macro(JVM_NewInstanceFromConstructor) \
4227 macro(JVM_InitializeFromArchive) \
4228 macro(JVM_RegisterLambdaProxyClassForArchiving) \
4229 macro(JVM_LookupLambdaProxyClassFromArchive) \
4230 macro(JVM_GetRandomSeedForDumping) \
4231 macro(JVM_LogLambdaFormInvoker) \
4232 macro(JVM_LogDynamicProxy) \
4233 macro(JVM_DumpClassListToFile) \
4234 macro(JVM_DumpDynamicArchive) \
4235 macro(JVM_GetAllThreads) \
4236 macro(JVM_DumpThreads) \
4237 macro(JVM_GetManagement) \
4238 macro(JVM_InitAgentProperties) \
4239 macro(JVM_GetEnclosingMethodInfo) \
4240 macro(JVM_GetVmArguments) \
4241 macro(JVM_FindSignal) \
4242 macro(JVM_VirtualThreadStart) \
4243 macro(JVM_VirtualThreadEnd) \
4244 macro(JVM_VirtualThreadMount) \
4245 macro(JVM_VirtualThreadUnmount) \
4246 macro(JVM_VirtualThreadHideFrames) \
4247 macro(JVM_GetClassFileVersion) \
4248 macro(JVM_EnsureMaterializedForStackWalk_func) \
4249 macro(JVM_PrintWarningAtDynamicAgentLoad)
4250
4251 #define INIT_COUNTER(name) \
4252 NEWPERFTICKCOUNTERS(_perf_##name##_timer, SUN_RT, #name); \
4253 NEWPERFEVENTCOUNTER(_perf_##name##_count, SUN_RT, #name "_count"); \
4254
4255 void perf_jvm_init() {
4256 if (ProfileVMCalls && UsePerfData) {
4257 EXCEPTION_MARK;
4258
4259 DO_COUNTERS(INIT_COUNTER)
4260
4261 if (HAS_PENDING_EXCEPTION) {
4262 vm_exit_during_initialization("jvm_perf_init failed unexpectedly");
4263 }
4264 }
4265 }
4266
4267 #undef INIT_COUNTER
4268
4269 #define PRINT_COUNTER(name) {\
4270 jlong count = _perf_##name##_count->get_value(); \
4271 if (count > 0) { \
4272 st->print_cr(" %-40s = %4ldms (elapsed) %4ldms (thread) (%5ld events)", #name, \
4273 _perf_##name##_timer->elapsed_counter_value_ms(), _perf_##name##_timer->thread_counter_value_ms(), count); \
4274 }}
4275
4276 void perf_jvm_print_on(outputStream* st) {
4277 if (ProfileVMCalls && UsePerfData) {
4278 DO_COUNTERS(PRINT_COUNTER)
4279 } else {
4280 st->print_cr(" JVM: no info (%s is disabled)", (UsePerfData ? "ProfileVMCalls" : "UsePerfData"));
4281 }
4282 }
4283
4284 #undef PRINT_COUNTER
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