6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
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 "cds/aotClassInitializer.hpp"
26 #include "cds/aotMetaspace.hpp"
27 #include "cds/cdsConfig.hpp"
28 #include "cds/classListParser.hpp"
29 #include "cds/classListWriter.hpp"
30 #include "cds/dynamicArchive.hpp"
31 #include "cds/heapShared.hpp"
32 #include "cds/lambdaFormInvokers.hpp"
33 #include "cds/lambdaProxyClassDictionary.hpp"
34 #include "classfile/classFileStream.hpp"
35 #include "classfile/classLoader.inline.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"
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/deoptimization.hpp"
77 #include "runtime/globals_extension.hpp"
78 #include "runtime/handles.inline.hpp"
79 #include "runtime/handshake.hpp"
80 #include "runtime/init.hpp"
81 #include "runtime/interfaceSupport.inline.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.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/vm_version.hpp"
96 #include "runtime/vmOperations.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"
212 }
213 }
214 }
215 if (caller != nullptr) {
216 if (to_class != caller) {
217 const char * from = caller->external_name();
218 const char * to = to_class->external_name();
219 // print in a single call to reduce interleaving between threads
220 if (source_file != nullptr) {
221 log_debug(class, resolve)("%s %s %s:%d (%s)", from, to, source_file, line_number, trace);
222 } else {
223 log_debug(class, resolve)("%s %s (%s)", from, to, trace);
224 }
225 }
226 }
227 }
228
229 // java.lang.System //////////////////////////////////////////////////////////////////////
230
231
232 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
233 return os::javaTimeMillis();
234 JVM_END
235
236 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored))
237 return os::javaTimeNanos();
238 JVM_END
239
240 // The function below is actually exposed by jdk.internal.misc.VM and not
241 // java.lang.System, but we choose to keep it here so that it stays next
242 // to JVM_CurrentTimeMillis and JVM_NanoTime
243
244 const jlong MAX_DIFF_SECS = CONST64(0x0100000000); // 2^32
245 const jlong MIN_DIFF_SECS = -MAX_DIFF_SECS; // -2^32
246
247 JVM_LEAF(jlong, JVM_GetNanoTimeAdjustment(JNIEnv *env, jclass ignored, jlong offset_secs))
248 jlong seconds;
249 jlong nanos;
250
251 os::javaTimeSystemUTC(seconds, nanos);
252
253 // We're going to verify that the result can fit in a long.
254 // For that we need the difference in seconds between 'seconds'
255 // and 'offset_secs' to be such that:
256 // |seconds - offset_secs| < (2^63/10^9)
257 // We're going to approximate 10^9 ~< 2^30 (1000^3 ~< 1024^3)
258 // which makes |seconds - offset_secs| < 2^33
259 // and we will prefer +/- 2^32 as the maximum acceptable diff
260 // as 2^32 has a more natural feel than 2^33...
261 //
262 // So if |seconds - offset_secs| >= 2^32 - we return a special
263 // sentinel value (-1) which the caller should take as an
264 // exception value indicating that the offset given to us is
265 // too far from range of the current time - leading to too big
266 // a nano adjustment. The caller is expected to recover by
267 // computing a more accurate offset and calling this method
268 // again. (For the record 2^32 secs is ~136 years, so that
269 // should rarely happen)
270 //
271 jlong diff = seconds - offset_secs;
272 if (diff >= MAX_DIFF_SECS || diff <= MIN_DIFF_SECS) {
273 return -1; // sentinel value: the offset is too far off the target
274 }
275
276 // return the adjustment. If you compute a time by adding
277 // this number of nanoseconds along with the number of seconds
278 // in the offset you should get the current UTC time.
279 return (diff * (jlong)1000000000) + nanos;
280 JVM_END
281
282 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
283 jobject dst, jint dst_pos, jint length))
284 // Check if we have null pointers
285 if (src == nullptr || dst == nullptr) {
286 THROW(vmSymbols::java_lang_NullPointerException());
287 }
288 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
289 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
290 assert(oopDesc::is_oop(s), "JVM_ArrayCopy: src not an oop");
291 assert(oopDesc::is_oop(d), "JVM_ArrayCopy: dst not an oop");
292 // Do copy
293 s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread);
294 JVM_END
295
296
297 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
298 JavaValue r(T_OBJECT);
299 // public synchronized Object put(Object key, Object value);
300 HandleMark hm(THREAD);
301 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK);
302 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != nullptr ? value : ""), CHECK);
303 JavaCalls::call_virtual(&r,
304 props,
305 vmClasses::Properties_klass(),
306 vmSymbols::put_name(),
307 vmSymbols::object_object_object_signature(),
308 key_str,
309 value_str,
310 THREAD);
311 }
312
313
314 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
315
316 /*
317 * Return all of the system properties in a Java String array with alternating
318 * names and values from the jvm SystemProperty.
319 * Which includes some internal and all commandline -D defined properties.
320 */
321 JVM_ENTRY(jobjectArray, JVM_GetProperties(JNIEnv *env))
322 ResourceMark rm(THREAD);
323 HandleMark hm(THREAD);
324 int ndx = 0;
325 int fixedCount = 2;
326
327 SystemProperty* p = Arguments::system_properties();
328 int count = Arguments::PropertyList_count(p);
329
330 // Allocate result String array
331 InstanceKlass* ik = vmClasses::String_klass();
332 objArrayOop r = oopFactory::new_objArray(ik, (count + fixedCount) * 2, CHECK_NULL);
333 objArrayHandle result_h(THREAD, r);
334
335 while (p != nullptr) {
336 const char * key = p->key();
337 if (strcmp(key, "sun.nio.MaxDirectMemorySize") != 0) {
338 const char * value = p->value();
339 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK_NULL);
340 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != nullptr ? value : ""), CHECK_NULL);
341 result_h->obj_at_put(ndx * 2, key_str());
389 Handle key_str = java_lang_String::create_from_platform_dependent_str("sun.management.compiler", CHECK_NULL);
390 Handle value_str = java_lang_String::create_from_platform_dependent_str(compiler_name, CHECK_NULL);
391 result_h->obj_at_put(ndx * 2, key_str());
392 result_h->obj_at_put(ndx * 2 + 1, value_str());
393 ndx++;
394 }
395 }
396
397 return (jobjectArray) JNIHandles::make_local(THREAD, result_h());
398 JVM_END
399
400
401 /*
402 * Return the temporary directory that the VM uses for the attach
403 * and perf data files.
404 *
405 * It is important that this directory is well-known and the
406 * same for all VM instances. It cannot be affected by configuration
407 * variables such as java.io.tmpdir.
408 */
409 JVM_ENTRY(jstring, JVM_GetTemporaryDirectory(JNIEnv *env))
410 HandleMark hm(THREAD);
411 const char* temp_dir = os::get_temp_directory();
412 Handle h = java_lang_String::create_from_platform_dependent_str(temp_dir, CHECK_NULL);
413 return (jstring) JNIHandles::make_local(THREAD, h());
414 JVM_END
415
416
417 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
418
419 extern volatile jint vm_created;
420
421 JVM_ENTRY_NO_ENV(void, JVM_BeforeHalt())
422 EventShutdown event;
423 if (event.should_commit()) {
424 event.set_reason("Shutdown requested from Java");
425 event.commit();
426 }
427 JVM_END
428
429
430 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code))
431 before_exit(thread, true);
432 vm_exit(code);
433 JVM_END
434
435
436 JVM_ENTRY_NO_ENV(void, JVM_GC(void))
437 if (!DisableExplicitGC) {
438 EventSystemGC event;
439 event.set_invokedConcurrent(ExplicitGCInvokesConcurrent);
440 Universe::heap()->collect(GCCause::_java_lang_system_gc);
441 event.commit();
442 }
443 JVM_END
444
445
446 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void))
447 return Universe::heap()->millis_since_last_whole_heap_examined();
448 JVM_END
449
450
451 static inline jlong convert_size_t_to_jlong(size_t val) {
452 // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
453 NOT_LP64 (return (jlong)val;)
454 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
455 }
456
457 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void))
458 size_t n = Universe::heap()->capacity();
459 return convert_size_t_to_jlong(n);
460 JVM_END
461
462
463 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void))
464 size_t n = Universe::heap()->unused();
465 return convert_size_t_to_jlong(n);
466 JVM_END
467
468
469 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void))
470 size_t n = Universe::heap()->max_capacity();
471 return convert_size_t_to_jlong(n);
472 JVM_END
473
474
475 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void))
476 return os::active_processor_count();
477 JVM_END
478
479 JVM_LEAF(jboolean, JVM_IsUseContainerSupport(void))
480 #ifdef LINUX
481 if (UseContainerSupport) {
482 return JNI_TRUE;
483 }
484 #endif
485 return JNI_FALSE;
486 JVM_END
487
488 JVM_LEAF(jboolean, JVM_IsContainerized(void))
489 #ifdef LINUX
490 if (OSContainer::is_containerized()) {
491 return JNI_TRUE;
492 }
493 #endif
494 return JNI_FALSE;
495 JVM_END
496
497 // java.lang.Throwable //////////////////////////////////////////////////////
498
499 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
500 Handle exception(thread, JNIHandles::resolve_non_null(receiver));
501 java_lang_Throwable::fill_in_stack_trace(exception);
502 JVM_END
503
504 // java.lang.NullPointerException ///////////////////////////////////////////
505
506 JVM_ENTRY(jstring, JVM_GetExtendedNPEMessage(JNIEnv *env, jthrowable throwable))
507 if (!ShowCodeDetailsInExceptionMessages) return nullptr;
508
509 oop exc = JNIHandles::resolve_non_null(throwable);
510
511 Method* method;
512 int bci;
513 if (!java_lang_Throwable::get_top_method_and_bci(exc, &method, &bci)) {
514 return nullptr;
515 }
516 if (method->is_native()) {
517 return nullptr;
518 }
519
520 stringStream ss;
521 bool ok = BytecodeUtils::get_NPE_message_at(&ss, method, bci);
522 if (ok) {
523 oop result = java_lang_String::create_oop_from_str(ss.base(), CHECK_NULL);
524 return (jstring) JNIHandles::make_local(THREAD, result);
525 } else {
526 return nullptr;
527 }
528 JVM_END
529
530 // java.lang.StackTraceElement //////////////////////////////////////////////
531
532
533 JVM_ENTRY(void, JVM_InitStackTraceElementArray(JNIEnv *env, jobjectArray elements, jobject backtrace, jint depth))
534 Handle backtraceh(THREAD, JNIHandles::resolve(backtrace));
535 objArrayOop st = objArrayOop(JNIHandles::resolve(elements));
536 objArrayHandle stack_trace(THREAD, st);
537 // Fill in the allocated stack trace
538 java_lang_Throwable::get_stack_trace_elements(depth, backtraceh, stack_trace, CHECK);
539 JVM_END
540
541
542 JVM_ENTRY(void, JVM_InitStackTraceElement(JNIEnv* env, jobject element, jobject stackFrameInfo))
543 Handle stack_frame_info(THREAD, JNIHandles::resolve_non_null(stackFrameInfo));
544 Handle stack_trace_element(THREAD, JNIHandles::resolve_non_null(element));
545 java_lang_StackFrameInfo::to_stack_trace_element(stack_frame_info, stack_trace_element, CHECK);
546 JVM_END
547
548
549 // java.lang.StackWalker //////////////////////////////////////////////////////
550 JVM_ENTRY(void, JVM_ExpandStackFrameInfo(JNIEnv *env, jobject obj))
551 Handle stack_frame_info(THREAD, JNIHandles::resolve_non_null(obj));
552
553 bool have_name = (java_lang_StackFrameInfo::name(stack_frame_info()) != nullptr);
554 bool have_type = (java_lang_StackFrameInfo::type(stack_frame_info()) != nullptr);
555 Method* method = java_lang_StackFrameInfo::get_method(stack_frame_info());
556 if (!have_name) {
557 oop name = StringTable::intern(method->name(), CHECK);
558 java_lang_StackFrameInfo::set_name(stack_frame_info(), name);
559 }
560 if (!have_type) {
561 Handle type = java_lang_String::create_from_symbol(method->signature(), CHECK);
562 java_lang_StackFrameInfo::set_type(stack_frame_info(), type());
563 }
564 JVM_END
565
566 JVM_ENTRY(jobject, JVM_CallStackWalk(JNIEnv *env, jobject stackStream, jint mode,
567 jint skip_frames, jobject contScope, jobject cont,
568 jint buffer_size, jint start_index, jobjectArray frames))
569 if (!thread->has_last_Java_frame()) {
570 THROW_MSG_(vmSymbols::java_lang_InternalError(), "doStackWalk: no stack trace", nullptr);
571 }
572
573 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
574 Handle contScope_h(THREAD, JNIHandles::resolve(contScope));
575 Handle cont_h(THREAD, JNIHandles::resolve(cont));
576 // frames array is a ClassFrameInfo[] array when only getting caller reference,
577 // and a StackFrameInfo[] array (or derivative) otherwise. It should never
578 // be null.
579 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
580 objArrayHandle frames_array_h(THREAD, fa);
581
582 if (frames_array_h->length() < buffer_size) {
583 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers", nullptr);
584 }
585
586 oop result = StackWalk::walk(stackStream_h, mode, skip_frames, contScope_h, cont_h,
587 buffer_size, start_index, frames_array_h, CHECK_NULL);
588 return JNIHandles::make_local(THREAD, result);
589 JVM_END
590
591
592 JVM_ENTRY(jint, JVM_MoreStackWalk(JNIEnv *env, jobject stackStream, jint mode, jlong anchor,
593 jint last_batch_count, jint buffer_size, jint start_index,
594 jobjectArray frames))
595 // frames array is a ClassFrameInfo[] array when only getting caller reference,
596 // and a StackFrameInfo[] array (or derivative) otherwise. It should never
597 // be null.
598 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
599 objArrayHandle frames_array_h(THREAD, fa);
600
601 if (frames_array_h->length() < buffer_size) {
602 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers");
603 }
604
605 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
606 return StackWalk::fetchNextBatch(stackStream_h, mode, anchor, last_batch_count, buffer_size,
607 start_index, frames_array_h, THREAD);
608 JVM_END
609
610 JVM_ENTRY(void, JVM_SetStackWalkContinuation(JNIEnv *env, jobject stackStream, jlong anchor, jobjectArray frames, jobject cont))
611 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
612 objArrayHandle frames_array_h(THREAD, fa);
613 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
614 Handle cont_h(THREAD, JNIHandles::resolve_non_null(cont));
615
616 StackWalk::setContinuation(stackStream_h, anchor, frames_array_h, cont_h, THREAD);
617 JVM_END
618
619 // java.lang.Object ///////////////////////////////////////////////
620
621
622 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle))
623 // as implemented in the classic virtual machine; return 0 if object is null
624 return handle == nullptr ? 0 :
625 checked_cast<jint>(ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)));
626 JVM_END
627
628
629 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
630 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
631 ObjectSynchronizer::wait(obj, ms, CHECK);
632 JVM_END
633
634
635 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
636 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
637 ObjectSynchronizer::notify(obj, CHECK);
638 JVM_END
639
640
641 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
642 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
643 ObjectSynchronizer::notifyall(obj, CHECK);
644 JVM_END
645
646
647 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle))
648 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
649 Klass* klass = obj->klass();
650 JvmtiVMObjectAllocEventCollector oam;
651
652 #ifdef ASSERT
653 // Just checking that the cloneable flag is set correct
654 if (obj->is_array()) {
655 guarantee(klass->is_cloneable(), "all arrays are cloneable");
656 } else {
657 guarantee(obj->is_instance(), "should be instanceOop");
658 bool cloneable = klass->is_subtype_of(vmClasses::Cloneable_klass());
659 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
660 }
661 #endif
662
663 // Check if class of obj supports the Cloneable interface.
664 // All arrays are considered to be cloneable (See JLS 20.1.5).
665 // All j.l.r.Reference classes are considered non-cloneable.
666 if (!klass->is_cloneable() ||
667 (klass->is_instance_klass() &&
680 } else {
681 new_obj_oop = Universe::heap()->obj_allocate(klass, size, CHECK_NULL);
682 }
683
684 HeapAccess<>::clone(obj(), new_obj_oop, size);
685
686 Handle new_obj(THREAD, new_obj_oop);
687 // Caution: this involves a java upcall, so the clone should be
688 // "gc-robust" by this stage.
689 if (klass->has_finalizer()) {
690 assert(obj->is_instance(), "should be instanceOop");
691 new_obj_oop = InstanceKlass::register_finalizer(instanceOop(new_obj()), CHECK_NULL);
692 new_obj = Handle(THREAD, new_obj_oop);
693 }
694
695 return JNIHandles::make_local(THREAD, new_obj());
696 JVM_END
697
698 // java.lang.ref.Finalizer ////////////////////////////////////////////////////
699
700 JVM_ENTRY(void, JVM_ReportFinalizationComplete(JNIEnv * env, jobject finalizee))
701 MANAGEMENT_ONLY(FinalizerService::on_complete(JNIHandles::resolve_non_null(finalizee), THREAD);)
702 JVM_END
703
704 JVM_LEAF(jboolean, JVM_IsFinalizationEnabled(JNIEnv * env))
705 return InstanceKlass::is_finalization_enabled();
706 JVM_END
707
708 // jdk.internal.vm.Continuation /////////////////////////////////////////////////////
709
710 JVM_ENTRY(void, JVM_RegisterContinuationMethods(JNIEnv *env, jclass cls))
711 CONT_RegisterNativeMethods(env, cls);
712 JVM_END
713
714 // java.io.File ///////////////////////////////////////////////////////////////
715
716 JVM_LEAF(char*, JVM_NativePath(char* path))
717 return os::native_path(path);
718 JVM_END
719
720
721 // Misc. class handling ///////////////////////////////////////////////////////////
722
723
724 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env))
725 // Getting the class of the caller frame.
726 //
727 // The call stack at this point looks something like this:
728 //
729 // [0] [ @CallerSensitive public jdk.internal.reflect.Reflection.getCallerClass ]
730 // [1] [ @CallerSensitive API.method ]
731 // [.] [ (skipped intermediate frames) ]
732 // [n] [ caller ]
733 vframeStream vfst(thread);
734 // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass
735 for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) {
736 Method* m = vfst.method();
737 assert(m != nullptr, "sanity");
738 switch (n) {
739 case 0:
740 // This must only be called from Reflection.getCallerClass
741 if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) {
742 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass");
743 }
744 // fall-through
745 case 1:
746 // Frame 0 and 1 must be caller sensitive.
747 if (!m->caller_sensitive()) {
748 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n));
749 }
750 break;
751 default:
752 if (!m->is_ignored_by_security_stack_walk()) {
753 // We have reached the desired frame; return the holder class.
754 return (jclass) JNIHandles::make_local(THREAD, m->method_holder()->java_mirror());
755 }
756 break;
757 }
758 }
759 return nullptr;
760 JVM_END
761
762
763 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
764 oop mirror = nullptr;
765 BasicType t = name2type(utf);
766 if (t != T_ILLEGAL && !is_reference_type(t)) {
767 mirror = Universe::java_mirror(t);
768 }
769 if (mirror == nullptr) {
770 THROW_MSG_NULL(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
771 } else {
772 return (jclass) JNIHandles::make_local(THREAD, mirror);
773 }
774 JVM_END
775
776
777 // Returns a class loaded by the bootstrap class loader; or null
778 // if not found. ClassNotFoundException is not thrown.
779 // FindClassFromBootLoader is exported to the launcher for windows.
780 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
781 const char* name))
782 // Java libraries should ensure that name is never null or illegal.
783 if (name == nullptr || (int)strlen(name) > Symbol::max_length()) {
784 // It's impossible to create this class; the name cannot fit
785 // into the constant pool.
786 return nullptr;
787 }
788 assert(UTF8::is_legal_utf8((const unsigned char*)name, strlen(name), false), "illegal UTF name");
789
790 TempNewSymbol h_name = SymbolTable::new_symbol(name);
791 Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
792 if (k == nullptr) {
793 return nullptr;
794 }
795
796 if (log_is_enabled(Debug, class, resolve)) {
797 trace_class_resolution(k);
798 }
799 return (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
800 JVM_END
801
802 // Find a class with this name in this loader, using the caller's protection domain.
803 JVM_ENTRY(jclass, JVM_FindClassFromCaller(JNIEnv* env, const char* name,
804 jboolean init, jobject loader,
805 jclass caller))
806 TempNewSymbol h_name =
807 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_ClassNotFoundException(),
808 CHECK_NULL);
809
810 oop loader_oop = JNIHandles::resolve(loader);
811 oop from_class = JNIHandles::resolve(caller);
812 Handle h_loader(THREAD, loader_oop);
813
814 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
815 false, THREAD);
816
817 if (log_is_enabled(Debug, class, resolve) && result != nullptr) {
818 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
819 }
820 return result;
821 JVM_END
822
823 // Currently only called from the old verifier.
824 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
825 jboolean init, jclass from))
826 TempNewSymbol h_name =
827 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_ClassNotFoundException(),
828 CHECK_NULL);
829 oop from_class_oop = JNIHandles::resolve(from);
830 Klass* from_class = (from_class_oop == nullptr)
831 ? (Klass*)nullptr
832 : java_lang_Class::as_Klass(from_class_oop);
833 oop class_loader = nullptr;
834 if (from_class != nullptr) {
835 class_loader = from_class->class_loader();
836 }
837 Handle h_loader(THREAD, class_loader);
838 jclass result = find_class_from_class_loader(env, h_name, init, h_loader, true, thread);
839
840 if (log_is_enabled(Debug, class, resolve) && result != nullptr) {
841 // this function is generally only used for class loading during verification.
842 ResourceMark rm;
843 oop from_mirror = JNIHandles::resolve_non_null(from);
844 Klass* from_class = java_lang_Class::as_Klass(from_mirror);
845 const char * from_name = from_class->external_name();
1004 ik->external_name(),
1005 host_class->external_name(),
1006 ik->is_hidden() ? "is hidden" : "is not hidden");
1007 }
1008 }
1009
1010 if ((!is_hidden || is_nestmate) && !Reflection::is_same_class_package(lookup_k, ik)) {
1011 // non-hidden class or nestmate class must be in the same package as the Lookup class
1012 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Lookup class and defined class are in different packages");
1013 }
1014
1015 if (init) {
1016 ik->initialize(CHECK_NULL);
1017 } else {
1018 ik->link_class(CHECK_NULL);
1019 }
1020
1021 return (jclass) JNIHandles::make_local(THREAD, ik->java_mirror());
1022 }
1023
1024 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
1025 return jvm_define_class_common(name, loader, buf, len, pd, nullptr, THREAD);
1026 JVM_END
1027
1028 /*
1029 * Define a class with the specified lookup class.
1030 * lookup: Lookup class
1031 * name: the name of the class
1032 * buf: class bytes
1033 * len: length of class bytes
1034 * pd: protection domain
1035 * init: initialize the class
1036 * flags: properties of the class
1037 * classData: private static pre-initialized field
1038 */
1039 JVM_ENTRY(jclass, JVM_LookupDefineClass(JNIEnv *env, jclass lookup, const char *name, const jbyte *buf,
1040 jsize len, jobject pd, jboolean initialize, int flags, jobject classData))
1041
1042 if (lookup == nullptr) {
1043 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Lookup class is null");
1044 }
1045
1046 assert(buf != nullptr, "buf must not be null");
1047
1048 return jvm_lookup_define_class(lookup, name, buf, len, pd, initialize, flags, classData, THREAD);
1049 JVM_END
1050
1051 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
1052
1053 return jvm_define_class_common(name, loader, buf, len, pd, source, THREAD);
1054 JVM_END
1055
1056 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
1057 ResourceMark rm(THREAD);
1058
1059 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
1060 char* str = java_lang_String::as_utf8_string(h_name());
1061
1062 // Sanity check, don't expect null
1063 if (str == nullptr) return nullptr;
1064
1065 // Internalize the string, converting '.' to '/' in string.
1066 char* p = (char*)str;
1067 while (*p != '\0') {
1068 if (*p == '.') {
1069 *p = '/';
1070 }
1071 p++;
1072 }
1073
1074 const int str_len = (int)(p - str);
1075 if (str_len > Symbol::max_length()) {
1076 // It's impossible to create this class; the name cannot fit
1080 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len);
1081
1082 // Security Note:
1083 // The Java level wrapper will perform the necessary security check allowing
1084 // us to pass the null as the initiating class loader.
1085 Handle h_loader(THREAD, JNIHandles::resolve(loader));
1086 Klass* k = SystemDictionary::find_instance_or_array_klass(THREAD, klass_name, h_loader);
1087 #if INCLUDE_CDS
1088 if (k == nullptr) {
1089 // If the class is not already loaded, try to see if it's in the shared
1090 // archive for the current classloader (h_loader).
1091 k = SystemDictionaryShared::find_or_load_shared_class(klass_name, h_loader, CHECK_NULL);
1092 }
1093 #endif
1094 return (k == nullptr) ? nullptr :
1095 (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
1096 JVM_END
1097
1098 // Module support //////////////////////////////////////////////////////////////////////////////
1099
1100 JVM_ENTRY(void, JVM_DefineModule(JNIEnv *env, jobject module, jboolean is_open, jstring version,
1101 jstring location, jobjectArray packages))
1102 Handle h_module (THREAD, JNIHandles::resolve(module));
1103 Modules::define_module(h_module, is_open, version, location, packages, CHECK);
1104 JVM_END
1105
1106 JVM_ENTRY(void, JVM_SetBootLoaderUnnamedModule(JNIEnv *env, jobject module))
1107 Handle h_module (THREAD, JNIHandles::resolve(module));
1108 Modules::set_bootloader_unnamed_module(h_module, CHECK);
1109 JVM_END
1110
1111 JVM_ENTRY(void, JVM_AddModuleExports(JNIEnv *env, jobject from_module, jstring package, jobject to_module))
1112 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1113 Handle h_to_module (THREAD, JNIHandles::resolve(to_module));
1114 Modules::add_module_exports_qualified(h_from_module, package, h_to_module, CHECK);
1115 JVM_END
1116
1117 JVM_ENTRY(void, JVM_AddModuleExportsToAllUnnamed(JNIEnv *env, jobject from_module, jstring package))
1118 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1119 Modules::add_module_exports_to_all_unnamed(h_from_module, package, CHECK);
1120 JVM_END
1121
1122 JVM_ENTRY(void, JVM_AddModuleExportsToAll(JNIEnv *env, jobject from_module, jstring package))
1123 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1124 Modules::add_module_exports(h_from_module, package, Handle(), CHECK);
1125 JVM_END
1126
1127 JVM_ENTRY (void, JVM_AddReadsModule(JNIEnv *env, jobject from_module, jobject source_module))
1128 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1129 Handle h_source_module (THREAD, JNIHandles::resolve(source_module));
1130 Modules::add_reads_module(h_from_module, h_source_module, CHECK);
1131 JVM_END
1132
1133 JVM_ENTRY(void, JVM_DefineArchivedModules(JNIEnv *env, jobject platform_loader, jobject system_loader))
1134 Handle h_platform_loader (THREAD, JNIHandles::resolve(platform_loader));
1135 Handle h_system_loader (THREAD, JNIHandles::resolve(system_loader));
1136 Modules::define_archived_modules(h_platform_loader, h_system_loader, CHECK);
1137 JVM_END
1138
1139 // Reflection support //////////////////////////////////////////////////////////////////////////////
1140
1141 JVM_ENTRY(jstring, JVM_InitClassName(JNIEnv *env, jclass cls))
1142 assert (cls != nullptr, "illegal class");
1143 JvmtiVMObjectAllocEventCollector oam;
1144 ResourceMark rm(THREAD);
1145 HandleMark hm(THREAD);
1146 Handle java_class(THREAD, JNIHandles::resolve(cls));
1147 oop result = java_lang_Class::name(java_class, CHECK_NULL);
1148 return (jstring) JNIHandles::make_local(THREAD, result);
1149 JVM_END
1150
1151
1152 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
1153 JvmtiVMObjectAllocEventCollector oam;
1154 oop mirror = JNIHandles::resolve_non_null(cls);
1155
1156 // Special handling for primitive objects
1157 if (java_lang_Class::is_primitive(mirror)) {
1158 // Primitive objects does not have any interfaces
1159 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(), 0, CHECK_NULL);
1160 return (jobjectArray) JNIHandles::make_local(THREAD, r);
1161 }
1162
1163 Klass* klass = java_lang_Class::as_Klass(mirror);
1164 // Figure size of result array
1165 int size;
1166 if (klass->is_instance_klass()) {
1167 size = InstanceKlass::cast(klass)->local_interfaces()->length();
1168 } else {
1169 assert(klass->is_objArray_klass() || klass->is_typeArray_klass(), "Illegal mirror klass");
1170 size = 2;
1171 }
1172
1173 // Allocate result array
1174 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(), size, CHECK_NULL);
1175 objArrayHandle result (THREAD, r);
1176 // Fill in result
1177 if (klass->is_instance_klass()) {
1178 // Regular instance klass, fill in all local interfaces
1179 for (int index = 0; index < size; index++) {
1180 InstanceKlass* k = InstanceKlass::cast(klass)->local_interfaces()->at(index);
1181 result->obj_at_put(index, k->java_mirror());
1182 }
1183 } else {
1184 // All arrays implement java.lang.Cloneable and java.io.Serializable
1185 result->obj_at_put(0, vmClasses::Cloneable_klass()->java_mirror());
1186 result->obj_at_put(1, vmClasses::Serializable_klass()->java_mirror());
1187 }
1188 return (jobjectArray) JNIHandles::make_local(THREAD, result());
1189 JVM_END
1190
1191
1192 JVM_ENTRY(jboolean, JVM_IsHiddenClass(JNIEnv *env, jclass cls))
1193 oop mirror = JNIHandles::resolve_non_null(cls);
1194 if (java_lang_Class::is_primitive(mirror)) {
1195 return JNI_FALSE;
1196 }
1197 Klass* k = java_lang_Class::as_Klass(mirror);
1198 return k->is_hidden();
1199 JVM_END
1200
1201
1202 class ScopedValueBindingsResolver {
1203 public:
1204 InstanceKlass* Carrier_klass;
1205 ScopedValueBindingsResolver(JavaThread* THREAD) {
1206 Klass *k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_ScopedValue_Carrier(), true, THREAD);
1207 Carrier_klass = InstanceKlass::cast(k);
1208 }
1209 };
1210
1211 JVM_ENTRY(jobject, JVM_FindScopedValueBindings(JNIEnv *env, jclass cls))
1212 ResourceMark rm(THREAD);
1213 GrowableArray<Handle>* local_array = new GrowableArray<Handle>(12);
1214 JvmtiVMObjectAllocEventCollector oam;
1215
1216 static ScopedValueBindingsResolver resolver(THREAD);
1217
1218 // Iterate through Java frames
1219 vframeStream vfst(thread);
1220 for(; !vfst.at_end(); vfst.next()) {
1221 int loc = -1;
1222 // get method of frame
1223 Method* method = vfst.method();
1224
1225 Symbol *name = method->name();
1226
1227 InstanceKlass* holder = method->method_holder();
1228 if (name == vmSymbols::runWith_method_name()) {
1229 if (holder == vmClasses::Thread_klass()
1230 || holder == resolver.Carrier_klass) {
1231 loc = 1;
1232 }
1233 }
1234
1235 if (loc != -1) {
1236 javaVFrame *frame = vfst.asJavaVFrame();
1237 StackValueCollection* locals = frame->locals();
1238 StackValue* head_sv = locals->at(loc); // java/lang/ScopedValue$Snapshot
1239 Handle result = head_sv->get_obj();
1240 assert(!head_sv->obj_is_scalar_replaced(), "found scalar-replaced object");
1241 if (result() != nullptr) {
1242 return JNIHandles::make_local(THREAD, result());
1243 }
1244 }
1245 }
1246
1247 return nullptr;
1248 JVM_END
1249
1250 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1251 JvmtiVMObjectAllocEventCollector oam;
1252 // ofClass is a reference to a java_lang_Class object. The mirror object
1253 // of an InstanceKlass
1254 oop ofMirror = JNIHandles::resolve_non_null(ofClass);
1255 if (java_lang_Class::is_primitive(ofMirror) ||
1256 ! java_lang_Class::as_Klass(ofMirror)->is_instance_klass()) {
1257 oop result = oopFactory::new_objArray(vmClasses::Class_klass(), 0, CHECK_NULL);
1258 return (jobjectArray)JNIHandles::make_local(THREAD, result);
1259 }
1260
1261 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(ofMirror));
1262 InnerClassesIterator iter(k);
1263
1264 if (iter.length() == 0) {
1265 // Neither an inner nor outer class
1266 oop result = oopFactory::new_objArray(vmClasses::Class_klass(), 0, CHECK_NULL);
1267 return (jobjectArray)JNIHandles::make_local(THREAD, result);
1268 }
1269
1270 // find inner class info
1296 result->obj_at_put(members, inner_klass->java_mirror());
1297 members++;
1298 }
1299 }
1300 }
1301 }
1302
1303 if (members != length) {
1304 // Return array of right length
1305 objArrayOop res = oopFactory::new_objArray(vmClasses::Class_klass(), members, CHECK_NULL);
1306 for(int i = 0; i < members; i++) {
1307 res->obj_at_put(i, result->obj_at(i));
1308 }
1309 return (jobjectArray)JNIHandles::make_local(THREAD, res);
1310 }
1311
1312 return (jobjectArray)JNIHandles::make_local(THREAD, result());
1313 JVM_END
1314
1315
1316 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1317 {
1318 // ofClass is a reference to a java_lang_Class object.
1319 oop ofMirror = JNIHandles::resolve_non_null(ofClass);
1320 if (java_lang_Class::is_primitive(ofMirror)) {
1321 return nullptr;
1322 }
1323 Klass* klass = java_lang_Class::as_Klass(ofMirror);
1324 if (!klass->is_instance_klass()) {
1325 return nullptr;
1326 }
1327
1328 bool inner_is_member = false;
1329 Klass* outer_klass
1330 = InstanceKlass::cast(klass)->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1331 if (outer_klass == nullptr) return nullptr; // already a top-level class
1332 if (!inner_is_member) return nullptr; // a hidden class (inside a method)
1333 return (jclass) JNIHandles::make_local(THREAD, outer_klass->java_mirror());
1334 }
1335 JVM_END
1336
1337 JVM_ENTRY(jstring, JVM_GetSimpleBinaryName(JNIEnv *env, jclass cls))
1338 {
1339 oop mirror = JNIHandles::resolve_non_null(cls);
1340 if (java_lang_Class::is_primitive(mirror)) {
1341 return nullptr;
1342 }
1343 Klass* klass = java_lang_Class::as_Klass(mirror);
1344 if (!klass->is_instance_klass()) {
1345 return nullptr;
1346 }
1347 InstanceKlass* k = InstanceKlass::cast(klass);
1348 int ooff = 0, noff = 0;
1349 if (k->find_inner_classes_attr(&ooff, &noff, THREAD)) {
1350 if (noff != 0) {
1351 constantPoolHandle i_cp(thread, k->constants());
1352 Symbol* name = i_cp->symbol_at(noff);
1353 Handle str = java_lang_String::create_from_symbol(name, CHECK_NULL);
1354 return (jstring) JNIHandles::make_local(THREAD, str());
1355 }
1356 }
1357 return nullptr;
1358 }
1359 JVM_END
1360
1361 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1362 assert (cls != nullptr, "illegal class");
1363 JvmtiVMObjectAllocEventCollector oam;
1364 ResourceMark rm(THREAD);
1365 oop mirror = JNIHandles::resolve_non_null(cls);
1366 // Return null for arrays and primitives
1367 if (!java_lang_Class::is_primitive(mirror)) {
1368 Klass* k = java_lang_Class::as_Klass(mirror);
1369 if (k->is_instance_klass()) {
1370 Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1371 if (sym == nullptr) return nullptr;
1372 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1373 return (jstring) JNIHandles::make_local(THREAD, str());
1374 }
1375 }
1376 return nullptr;
1377 JVM_END
1378
1379
1380 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1381 assert (cls != nullptr, "illegal class");
1382 oop mirror = JNIHandles::resolve_non_null(cls);
1383 // Return null for arrays and primitives
1384 if (!java_lang_Class::is_primitive(mirror)) {
1385 Klass* k = java_lang_Class::as_Klass(mirror);
1386 if (k->is_instance_klass()) {
1387 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1388 return (jbyteArray) JNIHandles::make_local(THREAD, a);
1389 }
1390 }
1391 return nullptr;
1392 JVM_END
1393
1394
1395 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd) {
1396 // some of this code was adapted from from jni_FromReflectedField
1397
1398 oop reflected = JNIHandles::resolve_non_null(field);
1399 oop mirror = java_lang_reflect_Field::clazz(reflected);
1400 Klass* k = java_lang_Class::as_Klass(mirror);
1429 int slot = 0;
1430
1431 if (reflected->klass() == vmClasses::reflect_Constructor_klass()) {
1432 mirror = java_lang_reflect_Constructor::clazz(reflected);
1433 slot = java_lang_reflect_Constructor::slot(reflected);
1434 } else {
1435 assert(reflected->klass() == vmClasses::reflect_Method_klass(),
1436 "wrong type");
1437 mirror = java_lang_reflect_Method::clazz(reflected);
1438 slot = java_lang_reflect_Method::slot(reflected);
1439 }
1440 Klass* k = java_lang_Class::as_Klass(mirror);
1441
1442 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1443 assert(m != nullptr, "cannot find method");
1444 return m; // caller has to deal with null in product mode
1445 }
1446
1447 /* Type use annotations support (JDK 1.8) */
1448
1449 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1450 assert (cls != nullptr, "illegal class");
1451 ResourceMark rm(THREAD);
1452 // Return null for arrays and primitives
1453 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1454 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1455 if (k->is_instance_klass()) {
1456 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1457 if (type_annotations != nullptr) {
1458 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1459 return (jbyteArray) JNIHandles::make_local(THREAD, a);
1460 }
1461 }
1462 }
1463 return nullptr;
1464 JVM_END
1465
1466 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1467 assert (method != nullptr, "illegal method");
1468 // method is a handle to a java.lang.reflect.Method object
1469 Method* m = jvm_get_method_common(method);
1470 if (m == nullptr) {
1471 return nullptr;
1472 }
1473
1474 AnnotationArray* type_annotations = m->type_annotations();
1475 if (type_annotations != nullptr) {
1476 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1477 return (jbyteArray) JNIHandles::make_local(THREAD, a);
1478 }
1479
1480 return nullptr;
1481 JVM_END
1482
1483 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1484 assert (field != nullptr, "illegal field");
1485 fieldDescriptor fd;
1486 bool gotFd = jvm_get_field_common(field, fd);
1487 if (!gotFd) {
1488 return nullptr;
1489 }
1490
1491 return (jbyteArray) JNIHandles::make_local(THREAD, Annotations::make_java_array(fd.type_annotations(), THREAD));
1492 JVM_END
1493
1494 static void bounds_check(const constantPoolHandle& cp, jint index, TRAPS) {
1495 if (!cp->is_within_bounds(index)) {
1496 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1497 }
1498 }
1499
1500 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1501 {
1502 // method is a handle to a java.lang.reflect.Method object
1503 Method* method_ptr = jvm_get_method_common(method);
1504 methodHandle mh (THREAD, method_ptr);
1505 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1506 const int num_params = mh->method_parameters_length();
1507
1508 if (num_params < 0) {
1509 // A -1 return value from method_parameters_length means there is no
1510 // parameter data. Return null to indicate this to the reflection
1511 // API.
1512 assert(num_params == -1, "num_params should be -1 if it is less than zero");
1513 return (jobjectArray)nullptr;
1514 } else {
1515 // Otherwise, we return something up to reflection, even if it is
1516 // a zero-length array. Why? Because in some cases this can
1517 // trigger a MalformedParametersException.
1518
1519 // make sure all the symbols are properly formatted
1520 for (int i = 0; i < num_params; i++) {
1533 objArrayOop result_oop = oopFactory::new_objArray(vmClasses::reflect_Parameter_klass(), num_params, CHECK_NULL);
1534 objArrayHandle result (THREAD, result_oop);
1535
1536 for (int i = 0; i < num_params; i++) {
1537 MethodParametersElement* params = mh->method_parameters_start();
1538 // For a 0 index, give a null symbol
1539 Symbol* sym = 0 != params[i].name_cp_index ?
1540 mh->constants()->symbol_at(params[i].name_cp_index) : nullptr;
1541 int flags = params[i].flags;
1542 oop param = Reflection::new_parameter(reflected_method, i, sym,
1543 flags, CHECK_NULL);
1544 result->obj_at_put(i, param);
1545 }
1546 return (jobjectArray)JNIHandles::make_local(THREAD, result());
1547 }
1548 }
1549 JVM_END
1550
1551 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1552
1553 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1554 {
1555 JvmtiVMObjectAllocEventCollector oam;
1556
1557 oop ofMirror = JNIHandles::resolve_non_null(ofClass);
1558 // Exclude primitive types and array types
1559 if (java_lang_Class::is_primitive(ofMirror) ||
1560 java_lang_Class::as_Klass(ofMirror)->is_array_klass()) {
1561 // Return empty array
1562 oop res = oopFactory::new_objArray(vmClasses::reflect_Field_klass(), 0, CHECK_NULL);
1563 return (jobjectArray) JNIHandles::make_local(THREAD, res);
1564 }
1565
1566 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(ofMirror));
1567 constantPoolHandle cp(THREAD, k->constants());
1568
1569 // Ensure class is linked
1570 k->link_class(CHECK_NULL);
1571
1572 // Allocate result
1573 int num_fields;
1584 objArrayOop r = oopFactory::new_objArray(vmClasses::reflect_Field_klass(), num_fields, CHECK_NULL);
1585 objArrayHandle result (THREAD, r);
1586
1587 int out_idx = 0;
1588 fieldDescriptor fd;
1589 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1590 if (!publicOnly || fs.access_flags().is_public()) {
1591 fd.reinitialize(k, fs.to_FieldInfo());
1592 oop field = Reflection::new_field(&fd, CHECK_NULL);
1593 result->obj_at_put(out_idx, field);
1594 ++out_idx;
1595 }
1596 }
1597 assert(out_idx == num_fields, "just checking");
1598 return (jobjectArray) JNIHandles::make_local(THREAD, result());
1599 }
1600 JVM_END
1601
1602 // A class is a record if and only if it is final and a direct subclass of
1603 // java.lang.Record and has a Record attribute; otherwise, it is not a record.
1604 JVM_ENTRY(jboolean, JVM_IsRecord(JNIEnv *env, jclass cls))
1605 {
1606 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1607 if (k != nullptr && k->is_instance_klass()) {
1608 InstanceKlass* ik = InstanceKlass::cast(k);
1609 return ik->is_record();
1610 } else {
1611 return false;
1612 }
1613 }
1614 JVM_END
1615
1616 // Returns an array containing the components of the Record attribute,
1617 // or null if the attribute is not present.
1618 //
1619 // Note that this function returns the components of the Record attribute
1620 // even if the class is not a record.
1621 JVM_ENTRY(jobjectArray, JVM_GetRecordComponents(JNIEnv* env, jclass ofClass))
1622 {
1623 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass));
1624 assert(c->is_instance_klass(), "must be");
1625 InstanceKlass* ik = InstanceKlass::cast(c);
1626
1627 Array<RecordComponent*>* components = ik->record_components();
1628 if (components != nullptr) {
1629 JvmtiVMObjectAllocEventCollector oam;
1630 constantPoolHandle cp(THREAD, ik->constants());
1631 int length = components->length();
1632 assert(length >= 0, "unexpected record_components length");
1633 objArrayOop record_components =
1634 oopFactory::new_objArray(vmClasses::RecordComponent_klass(), length, CHECK_NULL);
1635 objArrayHandle components_h (THREAD, record_components);
1636
1637 for (int x = 0; x < length; x++) {
1638 RecordComponent* component = components->at(x);
1639 assert(component != nullptr, "unexpected null record component");
1640 oop component_oop = java_lang_reflect_RecordComponent::create(ik, component, CHECK_NULL);
1641 components_h->obj_at_put(x, component_oop);
1708 for (int i = 0; i < num_methods; i++) {
1709 methodHandle method(THREAD, k->method_with_idnum(idnums->at(i)));
1710 if (method.is_null()) {
1711 // Method may have been deleted and seems this API can handle null
1712 // Otherwise should probably put a method that throws NSME
1713 result->obj_at_put(i, nullptr);
1714 } else {
1715 oop m;
1716 if (want_constructor) {
1717 m = Reflection::new_constructor(method, CHECK_NULL);
1718 } else {
1719 m = Reflection::new_method(method, false, CHECK_NULL);
1720 }
1721 result->obj_at_put(i, m);
1722 }
1723 }
1724
1725 return (jobjectArray) JNIHandles::make_local(THREAD, result());
1726 }
1727
1728 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1729 {
1730 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1731 /*want_constructor*/ false,
1732 vmClasses::reflect_Method_klass(), THREAD);
1733 }
1734 JVM_END
1735
1736 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1737 {
1738 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1739 /*want_constructor*/ true,
1740 vmClasses::reflect_Constructor_klass(), THREAD);
1741 }
1742 JVM_END
1743
1744 JVM_ENTRY(jboolean, JVM_AreNestMates(JNIEnv *env, jclass current, jclass member))
1745 {
1746 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1747 assert(c->is_instance_klass(), "must be");
1748 InstanceKlass* ck = InstanceKlass::cast(c);
1749 Klass* m = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(member));
1750 assert(m->is_instance_klass(), "must be");
1751 InstanceKlass* mk = InstanceKlass::cast(m);
1752 return ck->has_nestmate_access_to(mk, THREAD);
1753 }
1754 JVM_END
1755
1756 JVM_ENTRY(jclass, JVM_GetNestHost(JNIEnv* env, jclass current))
1757 {
1758 // current is not a primitive or array class
1759 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1760 assert(c->is_instance_klass(), "must be");
1761 InstanceKlass* ck = InstanceKlass::cast(c);
1762 InstanceKlass* host = ck->nest_host(THREAD);
1763 return (jclass) (host == nullptr ? nullptr :
1764 JNIHandles::make_local(THREAD, host->java_mirror()));
1765 }
1766 JVM_END
1767
1768 JVM_ENTRY(jobjectArray, JVM_GetNestMembers(JNIEnv* env, jclass current))
1769 {
1770 // current is not a primitive or array class
1771 ResourceMark rm(THREAD);
1772 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1773 assert(c->is_instance_klass(), "must be");
1774 InstanceKlass* ck = InstanceKlass::cast(c);
1775 InstanceKlass* host = ck->nest_host(THREAD);
1776
1777 log_trace(class, nestmates)("Calling GetNestMembers for type %s with nest-host %s",
1778 ck->external_name(), host->external_name());
1779 {
1780 JvmtiVMObjectAllocEventCollector oam;
1781 Array<u2>* members = host->nest_members();
1782 int length = members == nullptr ? 0 : members->length();
1783
1784 log_trace(class, nestmates)(" - host has %d listed nest members", length);
1785
1786 // nest host is first in the array so make it one bigger
1787 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(),
1788 length + 1, CHECK_NULL);
1828 log_trace(class, nestmates)(" - compacting array from length %d to %d",
1829 length + 1, count + 1);
1830
1831 objArrayOop r2 = oopFactory::new_objArray(vmClasses::Class_klass(),
1832 count + 1, CHECK_NULL);
1833 objArrayHandle result2(THREAD, r2);
1834 for (int i = 0; i < count + 1; i++) {
1835 result2->obj_at_put(i, result->obj_at(i));
1836 }
1837 return (jobjectArray)JNIHandles::make_local(THREAD, result2());
1838 }
1839 }
1840 else {
1841 assert(host == ck || ck->is_hidden(), "must be singleton nest or dynamic nestmate");
1842 }
1843 return (jobjectArray)JNIHandles::make_local(THREAD, result());
1844 }
1845 }
1846 JVM_END
1847
1848 JVM_ENTRY(jobjectArray, JVM_GetPermittedSubclasses(JNIEnv* env, jclass current))
1849 {
1850 oop mirror = JNIHandles::resolve_non_null(current);
1851 assert(!java_lang_Class::is_primitive(mirror), "should not be");
1852 Klass* c = java_lang_Class::as_Klass(mirror);
1853 assert(c->is_instance_klass(), "must be");
1854 InstanceKlass* ik = InstanceKlass::cast(c);
1855 ResourceMark rm(THREAD);
1856 log_trace(class, sealed)("Calling GetPermittedSubclasses for %s type %s",
1857 ik->is_sealed() ? "sealed" : "non-sealed", ik->external_name());
1858 if (ik->is_sealed()) {
1859 JvmtiVMObjectAllocEventCollector oam;
1860 Array<u2>* subclasses = ik->permitted_subclasses();
1861 int length = subclasses->length();
1862
1863 log_trace(class, sealed)(" - sealed class has %d permitted subclasses", length);
1864
1865 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(),
1866 length, CHECK_NULL);
1867 objArrayHandle result(THREAD, r);
1868 int count = 0;
1891 }
1892 if (count < length) {
1893 // we had invalid entries so we need to compact the array
1894 objArrayOop r2 = oopFactory::new_objArray(vmClasses::Class_klass(),
1895 count, CHECK_NULL);
1896 objArrayHandle result2(THREAD, r2);
1897 for (int i = 0; i < count; i++) {
1898 result2->obj_at_put(i, result->obj_at(i));
1899 }
1900 return (jobjectArray)JNIHandles::make_local(THREAD, result2());
1901 }
1902 return (jobjectArray)JNIHandles::make_local(THREAD, result());
1903 } else {
1904 return nullptr;
1905 }
1906 }
1907 JVM_END
1908
1909 // Constant pool access //////////////////////////////////////////////////////////
1910
1911 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1912 {
1913 JvmtiVMObjectAllocEventCollector oam;
1914 oop mirror = JNIHandles::resolve_non_null(cls);
1915 // Return null for primitives and arrays
1916 if (!java_lang_Class::is_primitive(mirror)) {
1917 Klass* k = java_lang_Class::as_Klass(mirror);
1918 if (k->is_instance_klass()) {
1919 InstanceKlass* k_h = InstanceKlass::cast(k);
1920 Handle jcp = reflect_ConstantPool::create(CHECK_NULL);
1921 reflect_ConstantPool::set_cp(jcp(), k_h->constants());
1922 return JNIHandles::make_local(THREAD, jcp());
1923 }
1924 }
1925 return nullptr;
1926 }
1927 JVM_END
1928
1929
1930 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj))
1931 {
1932 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1933 return cp->length();
1934 }
1935 JVM_END
1936
1937
1938 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jint index))
1939 {
1940 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1941 bounds_check(cp, index, CHECK_NULL);
1942 constantTag tag = cp->tag_at(index);
1943 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1944 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1945 }
1946 Klass* k = cp->klass_at(index, CHECK_NULL);
1947 return (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
1948 }
1949 JVM_END
1950
1951 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jint index))
1952 {
1953 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1954 bounds_check(cp, index, CHECK_NULL);
1955 constantTag tag = cp->tag_at(index);
1956 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1957 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1958 }
1959 Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
1960 if (k == nullptr) return nullptr;
1961 return (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
1962 }
1963 JVM_END
1964
1965 static jobject get_method_at_helper(const constantPoolHandle& cp, jint index, bool force_resolution, TRAPS) {
1966 constantTag tag = cp->tag_at(index);
1967 if (!tag.is_method() && !tag.is_interface_method()) {
1968 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1969 }
1970 int klass_ref = cp->uncached_klass_ref_index_at(index);
1971 Klass* k_o;
1975 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
1976 if (k_o == nullptr) return nullptr;
1977 }
1978 InstanceKlass* k = InstanceKlass::cast(k_o);
1979 Symbol* name = cp->uncached_name_ref_at(index);
1980 Symbol* sig = cp->uncached_signature_ref_at(index);
1981 methodHandle m (THREAD, k->find_method(name, sig));
1982 if (m.is_null()) {
1983 THROW_MSG_NULL(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
1984 }
1985 oop method;
1986 if (m->is_object_initializer()) {
1987 method = Reflection::new_constructor(m, CHECK_NULL);
1988 } else {
1989 // new_method accepts <clinit> as Method here
1990 method = Reflection::new_method(m, true, CHECK_NULL);
1991 }
1992 return JNIHandles::make_local(THREAD, method);
1993 }
1994
1995 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jint index))
1996 {
1997 JvmtiVMObjectAllocEventCollector oam;
1998 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1999 bounds_check(cp, index, CHECK_NULL);
2000 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
2001 return res;
2002 }
2003 JVM_END
2004
2005 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jint index))
2006 {
2007 JvmtiVMObjectAllocEventCollector oam;
2008 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2009 bounds_check(cp, index, CHECK_NULL);
2010 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
2011 return res;
2012 }
2013 JVM_END
2014
2015 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2016 constantTag tag = cp->tag_at(index);
2017 if (!tag.is_field()) {
2018 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2019 }
2020 int klass_ref = cp->uncached_klass_ref_index_at(index);
2021 Klass* k_o;
2022 if (force_resolution) {
2023 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2024 } else {
2025 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2026 if (k_o == nullptr) return nullptr;
2027 }
2028 InstanceKlass* k = InstanceKlass::cast(k_o);
2029 Symbol* name = cp->uncached_name_ref_at(index);
2030 Symbol* sig = cp->uncached_signature_ref_at(index);
2031 fieldDescriptor fd;
2032 Klass* target_klass = k->find_field(name, sig, &fd);
2033 if (target_klass == nullptr) {
2034 THROW_MSG_NULL(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2035 }
2036 oop field = Reflection::new_field(&fd, CHECK_NULL);
2037 return JNIHandles::make_local(THREAD, field);
2038 }
2039
2040 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jint index))
2041 {
2042 JvmtiVMObjectAllocEventCollector oam;
2043 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2044 bounds_check(cp, index, CHECK_NULL);
2045 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2046 return res;
2047 }
2048 JVM_END
2049
2050 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jint index))
2051 {
2052 JvmtiVMObjectAllocEventCollector oam;
2053 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2054 bounds_check(cp, index, CHECK_NULL);
2055 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2056 return res;
2057 }
2058 JVM_END
2059
2060 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jint index))
2061 {
2062 JvmtiVMObjectAllocEventCollector oam;
2063 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2064 bounds_check(cp, index, CHECK_NULL);
2065 constantTag tag = cp->tag_at(index);
2066 if (!tag.is_field_or_method()) {
2067 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2068 }
2069 int klass_ref = cp->uncached_klass_ref_index_at(index);
2070 Symbol* klass_name = cp->klass_name_at(klass_ref);
2071 Symbol* member_name = cp->uncached_name_ref_at(index);
2072 Symbol* member_sig = cp->uncached_signature_ref_at(index);
2073 objArrayOop dest_o = oopFactory::new_objArray(vmClasses::String_klass(), 3, CHECK_NULL);
2074 objArrayHandle dest(THREAD, dest_o);
2075 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2076 dest->obj_at_put(0, str());
2077 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2078 dest->obj_at_put(1, str());
2079 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2080 dest->obj_at_put(2, str());
2081 return (jobjectArray) JNIHandles::make_local(THREAD, dest());
2082 }
2083 JVM_END
2084
2085 JVM_ENTRY(jint, JVM_ConstantPoolGetClassRefIndexAt(JNIEnv *env, jobject obj, jint index))
2086 {
2087 JvmtiVMObjectAllocEventCollector oam;
2088 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2089 bounds_check(cp, index, CHECK_0);
2090 constantTag tag = cp->tag_at(index);
2091 if (!tag.is_field_or_method()) {
2092 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2093 }
2094 return (jint) cp->uncached_klass_ref_index_at(index);
2095 }
2096 JVM_END
2097
2098 JVM_ENTRY(jint, JVM_ConstantPoolGetNameAndTypeRefIndexAt(JNIEnv *env, jobject obj, jint index))
2099 {
2100 JvmtiVMObjectAllocEventCollector oam;
2101 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2102 bounds_check(cp, index, CHECK_0);
2103 constantTag tag = cp->tag_at(index);
2104 if (!tag.is_invoke_dynamic() && !tag.is_field_or_method()) {
2105 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2106 }
2107 return (jint) cp->uncached_name_and_type_ref_index_at(index);
2108 }
2109 JVM_END
2110
2111 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetNameAndTypeRefInfoAt(JNIEnv *env, jobject obj, jint index))
2112 {
2113 JvmtiVMObjectAllocEventCollector oam;
2114 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2115 bounds_check(cp, index, CHECK_NULL);
2116 constantTag tag = cp->tag_at(index);
2117 if (!tag.is_name_and_type()) {
2118 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2119 }
2120 Symbol* member_name = cp->symbol_at(cp->name_ref_index_at(index));
2121 Symbol* member_sig = cp->symbol_at(cp->signature_ref_index_at(index));
2122 objArrayOop dest_o = oopFactory::new_objArray(vmClasses::String_klass(), 2, CHECK_NULL);
2123 objArrayHandle dest(THREAD, dest_o);
2124 Handle str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2125 dest->obj_at_put(0, str());
2126 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2127 dest->obj_at_put(1, str());
2128 return (jobjectArray) JNIHandles::make_local(THREAD, dest());
2129 }
2130 JVM_END
2131
2132 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jint index))
2133 {
2134 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2135 bounds_check(cp, index, CHECK_0);
2136 constantTag tag = cp->tag_at(index);
2137 if (!tag.is_int()) {
2138 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2139 }
2140 return cp->int_at(index);
2141 }
2142 JVM_END
2143
2144 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jint index))
2145 {
2146 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2147 bounds_check(cp, index, CHECK_(0L));
2148 constantTag tag = cp->tag_at(index);
2149 if (!tag.is_long()) {
2150 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2151 }
2152 return cp->long_at(index);
2153 }
2154 JVM_END
2155
2156 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jint index))
2157 {
2158 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2159 bounds_check(cp, index, CHECK_(0.0f));
2160 constantTag tag = cp->tag_at(index);
2161 if (!tag.is_float()) {
2162 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2163 }
2164 return cp->float_at(index);
2165 }
2166 JVM_END
2167
2168 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jint index))
2169 {
2170 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2171 bounds_check(cp, index, CHECK_(0.0));
2172 constantTag tag = cp->tag_at(index);
2173 if (!tag.is_double()) {
2174 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2175 }
2176 return cp->double_at(index);
2177 }
2178 JVM_END
2179
2180 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jint index))
2181 {
2182 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2183 bounds_check(cp, index, CHECK_NULL);
2184 constantTag tag = cp->tag_at(index);
2185 if (!tag.is_string()) {
2186 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2187 }
2188 oop str = cp->string_at(index, CHECK_NULL);
2189 return (jstring) JNIHandles::make_local(THREAD, str);
2190 }
2191 JVM_END
2192
2193 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jint index))
2194 {
2195 JvmtiVMObjectAllocEventCollector oam;
2196 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2197 bounds_check(cp, index, CHECK_NULL);
2198 constantTag tag = cp->tag_at(index);
2199 if (!tag.is_symbol()) {
2200 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2201 }
2202 Symbol* sym = cp->symbol_at(index);
2203 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2204 return (jstring) JNIHandles::make_local(THREAD, str());
2205 }
2206 JVM_END
2207
2208 JVM_ENTRY(jbyte, JVM_ConstantPoolGetTagAt(JNIEnv *env, jobject obj, jint index))
2209 {
2210 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2211 bounds_check(cp, index, CHECK_0);
2212 constantTag tag = cp->tag_at(index);
2213 jbyte result = tag.value();
2214 // If returned tag values are not from the JVM spec, e.g. tags from 100 to 105,
2215 // they are changed to the corresponding tags from the JVM spec, so that java code in
2216 // sun.reflect.ConstantPool will return only tags from the JVM spec, not internal ones.
2217 if (tag.is_klass_or_reference()) {
2218 result = JVM_CONSTANT_Class;
2219 } else if (tag.is_string_index()) {
2220 result = JVM_CONSTANT_String;
2221 } else if (tag.is_method_type_in_error()) {
2222 result = JVM_CONSTANT_MethodType;
2223 } else if (tag.is_method_handle_in_error()) {
2224 result = JVM_CONSTANT_MethodHandle;
2225 } else if (tag.is_dynamic_constant_in_error()) {
2226 result = JVM_CONSTANT_Dynamic;
2227 }
2228 return result;
2229 }
2230 JVM_END
2231
2232 // Assertion support. //////////////////////////////////////////////////////////
2233
2234 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2235 assert(cls != nullptr, "bad class");
2236
2237 oop r = JNIHandles::resolve(cls);
2238 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2239 if (java_lang_Class::is_primitive(r)) return false;
2240
2241 Klass* k = java_lang_Class::as_Klass(r);
2242 assert(k->is_instance_klass(), "must be an instance klass");
2243 if (!k->is_instance_klass()) return false;
2244
2245 ResourceMark rm(THREAD);
2246 const char* name = k->name()->as_C_string();
2247 bool system_class = k->class_loader() == nullptr;
2248 return JavaAssertions::enabled(name, system_class);
2249
2250 JVM_END
2251
2252
2253 // Return a new AssertionStatusDirectives object with the fields filled in with
2254 // command-line assertion arguments (i.e., -ea, -da).
2255 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2256 JvmtiVMObjectAllocEventCollector oam;
2257 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2258 return JNIHandles::make_local(THREAD, asd);
2259 JVM_END
2260
2261 // Verification ////////////////////////////////////////////////////////////////////////////////
2262
2263 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2264
2265 // RedefineClasses support: bug 6214132 caused verification to fail.
2266 // All functions from this section should call the jvmtiThreadSate function:
2267 // Klass* class_to_verify_considering_redefinition(Klass* klass).
2268 // The function returns a Klass* of the _scratch_class if the verifier
2269 // was invoked in the middle of the class redefinition.
2270 // Otherwise it returns its argument value which is the _the_class Klass*.
2271 // Please, refer to the description in the jvmtiThreadState.hpp.
2272
2273 JVM_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
2274 oop mirror = JNIHandles::resolve_non_null(cls);
2275 if (java_lang_Class::is_primitive(mirror)) {
2276 return JNI_FALSE;
2277 }
2278 Klass* k = java_lang_Class::as_Klass(mirror);
2279 // This isn't necessary since answer is the same since redefinition
2280 // has already checked this matches for the scratch class.
2281 // k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2282 jboolean result = k->is_interface();
2283 assert(!result || k->is_instance_klass(),
2284 "all interfaces are instance types");
2285 return result;
2286 JVM_END
2287
2288
2289 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2290 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2291 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2292 return k->name()->as_utf8();
2293 JVM_END
2294
2295
2296 JVM_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2297 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2298 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2299 // types will have length zero if this is not an InstanceKlass
2300 // (length is determined by call to JVM_GetClassCPEntriesCount)
2301 if (k->is_instance_klass()) {
2302 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2303 for (int index = cp->length() - 1; index >= 0; index--) {
2304 constantTag tag = cp->tag_at(index);
2305 types[index] = (tag.is_unresolved_klass()) ? (unsigned char) JVM_CONSTANT_Class : tag.value();
2306 }
2307 }
2308 JVM_END
2309
2310
2311 JVM_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2312 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2313 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2314 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->constants()->length();
2315 JVM_END
2316
2317
2318 JVM_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2319 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2320 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2321 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->java_fields_count();
2322 JVM_END
2323
2324
2325 JVM_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2326 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2327 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2328 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->methods()->length();
2329 JVM_END
2330
2331
2332 // The following methods, used for the verifier, are never called with
2333 // array klasses, so a direct cast to InstanceKlass is safe.
2334 // Typically, these methods are called in a loop with bounds determined
2335 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2336 // zero for arrays.
2337 JVM_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2338 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2339 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2340 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2341 int length = method->checked_exceptions_length();
2342 if (length > 0) {
2343 CheckedExceptionElement* table= method->checked_exceptions_start();
2344 for (int i = 0; i < length; i++) {
2345 exceptions[i] = table[i].class_cp_index;
2346 }
2347 }
2348 JVM_END
2349
2350
2351 JVM_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2352 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2353 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2354 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2355 return method->checked_exceptions_length();
2356 JVM_END
2357
2358
2359 JVM_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2360 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2361 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2362 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2363 memcpy(code, method->code_base(), method->code_size());
2364 JVM_END
2365
2366
2367 JVM_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2368 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2369 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2370 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2371 return method->code_size();
2372 JVM_END
2373
2374
2375 JVM_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2376 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2377 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2378 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2379 ExceptionTable extable(method);
2380 entry->start_pc = extable.start_pc(entry_index);
2381 entry->end_pc = extable.end_pc(entry_index);
2382 entry->handler_pc = extable.handler_pc(entry_index);
2383 entry->catchType = extable.catch_type_index(entry_index);
2384 JVM_END
2385
2386
2387 JVM_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2388 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2389 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2390 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2391 return method->exception_table_length();
2392 JVM_END
2393
2394
2395 JVM_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2396 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2397 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2398 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2399 return method->access_flags().as_method_flags();
2400 JVM_END
2401
2402
2403 JVM_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2404 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2405 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2406 return InstanceKlass::cast(k)->field_access_flags(field_index);
2407 JVM_END
2408
2409
2410 JVM_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2411 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2412 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2413 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2414 return method->max_locals();
2415 JVM_END
2416
2417
2418 JVM_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2419 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2420 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2421 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2422 return method->size_of_parameters();
2423 JVM_END
2424
2425
2426 JVM_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2427 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2428 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2429 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2430 return method->verifier_max_stack();
2431 JVM_END
2432
2433
2434 JVM_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2435 ResourceMark rm(THREAD);
2436 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2437 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2438 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2439 return method->name() == vmSymbols::object_initializer_name();
2440 JVM_END
2441
2442
2443 JVM_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2444 ResourceMark rm(THREAD);
2445 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2446 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2447 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2448 return method->is_overpass();
2449 JVM_END
2450
2451 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2452 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2453 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2454 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2455 return method->name()->as_utf8();
2456 JVM_END
2457
2458
2459 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2460 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2461 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2462 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2463 return method->signature()->as_utf8();
2464 JVM_END
2465
2466 /**
2467 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2468 * read entries in the constant pool. Since the old verifier always
2469 * works on a copy of the code, it will not see any rewriting that
2470 * may possibly occur in the middle of verification. So it is important
2471 * that nothing it calls tries to use the cpCache instead of the raw
2472 * constant pool, so we must use cp->uncached_x methods when appropriate.
2473 */
2474 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2475 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2476 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2477 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2478 switch (cp->tag_at(cp_index).value()) {
2479 case JVM_CONSTANT_Fieldref:
2480 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2481 default:
2482 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2483 }
2484 ShouldNotReachHere();
2485 return nullptr;
2486 JVM_END
2487
2488
2489 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2490 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2491 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2492 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2493 switch (cp->tag_at(cp_index).value()) {
2494 case JVM_CONSTANT_InterfaceMethodref:
2495 case JVM_CONSTANT_Methodref:
2496 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2497 default:
2498 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2499 }
2500 ShouldNotReachHere();
2501 return nullptr;
2502 JVM_END
2503
2504
2505 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2506 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2507 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2508 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2509 switch (cp->tag_at(cp_index).value()) {
2510 case JVM_CONSTANT_InterfaceMethodref:
2511 case JVM_CONSTANT_Methodref:
2512 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2513 default:
2514 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2515 }
2516 ShouldNotReachHere();
2517 return nullptr;
2518 JVM_END
2519
2520
2521 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2522 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2523 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2524 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2525 switch (cp->tag_at(cp_index).value()) {
2526 case JVM_CONSTANT_Fieldref:
2527 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2528 default:
2529 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2530 }
2531 ShouldNotReachHere();
2532 return nullptr;
2533 JVM_END
2534
2535
2536 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2537 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2538 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2539 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2540 Symbol* classname = cp->klass_name_at(cp_index);
2541 return classname->as_utf8();
2542 JVM_END
2543
2544
2545 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2546 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2547 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2548 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2549 switch (cp->tag_at(cp_index).value()) {
2550 case JVM_CONSTANT_Fieldref: {
2551 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2552 Symbol* classname = cp->klass_name_at(class_index);
2553 return classname->as_utf8();
2554 }
2555 default:
2556 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2557 }
2558 ShouldNotReachHere();
2559 return nullptr;
2560 JVM_END
2561
2562
2563 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2564 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2565 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2566 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2567 switch (cp->tag_at(cp_index).value()) {
2568 case JVM_CONSTANT_Methodref:
2569 case JVM_CONSTANT_InterfaceMethodref: {
2570 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2571 Symbol* classname = cp->klass_name_at(class_index);
2572 return classname->as_utf8();
2573 }
2574 default:
2575 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2576 }
2577 ShouldNotReachHere();
2578 return nullptr;
2579 JVM_END
2580
2581
2582 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2583 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2584 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2585 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2586 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2587 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2588 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2589 switch (cp->tag_at(cp_index).value()) {
2590 case JVM_CONSTANT_Fieldref: {
2591 Symbol* name = cp->uncached_name_ref_at(cp_index);
2592 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2593 InstanceKlass* ik = InstanceKlass::cast(k_called);
2594 for (JavaFieldStream fs(ik); !fs.done(); fs.next()) {
2595 if (fs.name() == name && fs.signature() == signature) {
2596 return fs.access_flags().as_field_flags();
2597 }
2598 }
2599 return -1;
2600 }
2601 default:
2602 fatal("JVM_GetCPFieldModifiers: illegal constant");
2603 }
2604 ShouldNotReachHere();
2605 return 0;
2606 JVM_END
2607
2608
2609 JVM_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2610 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2611 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2612 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2613 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2614 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2615 switch (cp->tag_at(cp_index).value()) {
2616 case JVM_CONSTANT_Methodref:
2617 case JVM_CONSTANT_InterfaceMethodref: {
2618 Symbol* name = cp->uncached_name_ref_at(cp_index);
2619 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2620 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2621 int methods_count = methods->length();
2622 for (int i = 0; i < methods_count; i++) {
2623 Method* method = methods->at(i);
2624 if (method->name() == name && method->signature() == signature) {
2625 return method->access_flags().as_method_flags();
2626 }
2627 }
2628 return -1;
2629 }
2630 default:
2631 fatal("JVM_GetCPMethodModifiers: illegal constant");
2632 }
2633 ShouldNotReachHere();
2634 return 0;
2635 JVM_END
2636
2637
2638 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2639
2640 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2641 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2642 JVM_END
2643
2644
2645 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2646 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2647 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2648 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2649 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2650 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2651 JVM_END
2652
2653 // Printing support //////////////////////////////////////////////////
2654 extern "C" {
2655
2656 ATTRIBUTE_PRINTF(3, 0)
2657 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2658 // Reject count values that are negative signed values converted to
2659 // unsigned; see bug 4399518, 4417214
2660 if ((intptr_t)count <= 0) return -1;
2661
2662 int result = os::vsnprintf(str, count, fmt, args);
2663 if (result > 0 && (size_t)result >= count) {
2664 result = -1;
2665 }
2724 // In most of the JVM thread support functions we need to access the
2725 // thread through a ThreadsListHandle to prevent it from exiting and
2726 // being reclaimed while we try to operate on it. The exceptions to this
2727 // rule are when operating on the current thread, or if the monitor of
2728 // the target java.lang.Thread is locked at the Java level - in both
2729 // cases the target cannot exit.
2730
2731 static void thread_entry(JavaThread* thread, TRAPS) {
2732 HandleMark hm(THREAD);
2733 Handle obj(THREAD, thread->threadObj());
2734 JavaValue result(T_VOID);
2735 JavaCalls::call_virtual(&result,
2736 obj,
2737 vmClasses::Thread_klass(),
2738 vmSymbols::run_method_name(),
2739 vmSymbols::void_method_signature(),
2740 THREAD);
2741 }
2742
2743
2744 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2745 #if INCLUDE_CDS
2746 if (CDSConfig::allow_only_single_java_thread()) {
2747 // During java -Xshare:dump, if we allow multiple Java threads to
2748 // execute in parallel, symbols and classes may be loaded in
2749 // random orders which will make the resulting CDS archive
2750 // non-deterministic.
2751 //
2752 // Lucikly, during java -Xshare:dump, it's important to run only
2753 // the code in the main Java thread (which is NOT started here) that
2754 // creates the module graph, etc. It's safe to not start the other
2755 // threads which are launched by class static initializers
2756 // (ReferenceHandler, FinalizerThread and CleanerImpl).
2757 if (log_is_enabled(Info, aot)) {
2758 ResourceMark rm;
2759 oop t = JNIHandles::resolve_non_null(jthread);
2760 log_info(aot)("JVM_StartThread() ignored: %s", t->klass()->external_name());
2761 }
2762 return;
2763 }
2764 #endif
2821 log_warning(os, thread)("Failed to start the native thread for java.lang.Thread \"%s\"",
2822 JavaThread::name_for(JNIHandles::resolve_non_null(jthread)));
2823 // No one should hold a reference to the 'native_thread'.
2824 native_thread->smr_delete();
2825 if (JvmtiExport::should_post_resource_exhausted()) {
2826 JvmtiExport::post_resource_exhausted(
2827 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2828 os::native_thread_creation_failed_msg());
2829 }
2830 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2831 os::native_thread_creation_failed_msg());
2832 }
2833
2834 JFR_ONLY(Jfr::on_java_thread_start(thread, native_thread);)
2835
2836 Thread::start(native_thread);
2837
2838 JVM_END
2839
2840
2841 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
2842 ThreadsListHandle tlh(thread);
2843 oop java_thread = nullptr;
2844 JavaThread* receiver = nullptr;
2845 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, &java_thread);
2846 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
2847
2848 if (is_alive) {
2849 // jthread refers to a live JavaThread.
2850 Thread::set_priority(receiver, (ThreadPriority)prio);
2851 }
2852 // Implied else: If the JavaThread hasn't started yet, then the
2853 // priority set in the java.lang.Thread object above will be pushed
2854 // down when it does start.
2855 JVM_END
2856
2857
2858 JVM_LEAF(void, JVM_Yield(JNIEnv *env, jclass threadClass))
2859 HOTSPOT_THREAD_YIELD();
2860 os::naked_yield();
2861 JVM_END
2862
2863 JVM_ENTRY(void, JVM_SleepNanos(JNIEnv* env, jclass threadClass, jlong nanos))
2864 if (nanos < 0) {
2865 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "nanosecond timeout value out of range");
2866 }
2867
2868 if (thread->is_interrupted(true) && !HAS_PENDING_EXCEPTION) {
2869 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2870 }
2871
2872 // Save current thread state and restore it at the end of this block.
2873 // And set new thread state to SLEEPING.
2874 JavaThreadSleepState jtss(thread);
2875
2876 HOTSPOT_THREAD_SLEEP_BEGIN(nanos / NANOSECS_PER_MILLISEC);
2877
2878 if (nanos == 0) {
2879 os::naked_yield();
2880 } else {
2881 ThreadState old_state = thread->osthread()->get_state();
2882 thread->osthread()->set_state(SLEEPING);
2883 if (!thread->sleep_nanos(nanos)) { // interrupted or async exception was installed
2884 // An asynchronous exception could have been thrown on
2885 // us while we were sleeping. We do not overwrite those.
2886 if (!HAS_PENDING_EXCEPTION) {
2887 HOTSPOT_THREAD_SLEEP_END(1);
2888 if (!thread->has_async_exception_condition()) {
2889 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
2890 // to properly restore the thread state. That's likely wrong.
2891 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2892 }
2893 }
2894 }
2895 thread->osthread()->set_state(old_state);
2896 }
2897 HOTSPOT_THREAD_SLEEP_END(0);
2898 JVM_END
2899
2900 JVM_ENTRY(jobject, JVM_CurrentCarrierThread(JNIEnv* env, jclass threadClass))
2901 oop jthread = thread->threadObj();
2902 assert(jthread != nullptr, "no current carrier thread!");
2903 return JNIHandles::make_local(THREAD, jthread);
2904 JVM_END
2905
2906 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
2907 oop theThread = thread->vthread();
2908 assert(theThread != (oop)nullptr, "no current thread!");
2909 return JNIHandles::make_local(THREAD, theThread);
2910 JVM_END
2911
2912 JVM_ENTRY(void, JVM_SetCurrentThread(JNIEnv* env, jobject thisThread,
2913 jobject theThread))
2914 oop threadObj = JNIHandles::resolve(theThread);
2915 thread->set_vthread(threadObj);
2916
2917 // Set _monitor_owner_id of new current Thread
2918 thread->set_monitor_owner_id(java_lang_Thread::thread_id(threadObj));
2919
2920 JFR_ONLY(Jfr::on_set_current_thread(thread, threadObj);)
2921 JVM_END
2922
2923 JVM_ENTRY(jlong, JVM_GetNextThreadIdOffset(JNIEnv* env, jclass threadClass))
2924 return ThreadIdentifier::unsafe_offset();
2925 JVM_END
2926
2927 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
2928 ThreadsListHandle tlh(thread);
2929 JavaThread* receiver = nullptr;
2930 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, nullptr);
2931 if (is_alive) {
2932 // jthread refers to a live JavaThread.
2933 receiver->interrupt();
2934 }
2935 JVM_END
2936
2937 // Return true iff the current thread has locked the object passed in
2938
2939 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
2940 if (obj == nullptr) {
2941 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
2942 }
2943 Handle h_obj(THREAD, JNIHandles::resolve(obj));
2944 return ObjectSynchronizer::current_thread_holds_lock(thread, h_obj);
2945 JVM_END
2946
2947 JVM_ENTRY(jobject, JVM_GetStackTrace(JNIEnv *env, jobject jthread))
2948 oop trace = java_lang_Thread::async_get_stack_trace(jthread, THREAD);
2949 return JNIHandles::make_local(THREAD, trace);
2950 JVM_END
2951
2952 JVM_ENTRY(jobject, JVM_CreateThreadSnapshot(JNIEnv* env, jobject jthread))
2953 #if INCLUDE_JVMTI
2954 oop snapshot = ThreadSnapshotFactory::get_thread_snapshot(jthread, THREAD);
2955 return JNIHandles::make_local(THREAD, snapshot);
2956 #else
2957 THROW_NULL(vmSymbols::java_lang_UnsupportedOperationException());
2958 #endif
2959 JVM_END
2960
2961 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
2962 // We don't use a ThreadsListHandle here because the current thread
2963 // must be alive.
2964 oop java_thread = JNIHandles::resolve_non_null(jthread);
2965 JavaThread* thr = java_lang_Thread::thread(java_thread);
2966 if (thread == thr && !thr->has_attached_via_jni()) {
2967 // Thread naming is only supported for the current thread and
2968 // we don't set the name of an attached thread to avoid stepping
2969 // on other programs.
2970 ResourceMark rm(thread);
2971 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
2972 os::set_native_thread_name(thread_name);
2973 }
2974 JVM_END
2975
2976 JVM_ENTRY(jobject, JVM_ScopedValueCache(JNIEnv* env, jclass threadClass))
2977 oop theCache = thread->scopedValueCache();
2978 return JNIHandles::make_local(THREAD, theCache);
2979 JVM_END
2980
2981 JVM_ENTRY(void, JVM_SetScopedValueCache(JNIEnv* env, jclass threadClass,
2982 jobject theCache))
2983 arrayOop objs = arrayOop(JNIHandles::resolve(theCache));
2984 thread->set_scopedValueCache(objs);
2985 JVM_END
2986
2987
2988 // java.lang.Package ////////////////////////////////////////////////////////////////
2989
2990
2991 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
2992 ResourceMark rm(THREAD);
2993 JvmtiVMObjectAllocEventCollector oam;
2994 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
2995 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
2996 return (jstring) JNIHandles::make_local(THREAD, result);
2997 JVM_END
2998
2999
3000 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3001 JvmtiVMObjectAllocEventCollector oam;
3002 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3003 return (jobjectArray) JNIHandles::make_local(THREAD, result);
3004 JVM_END
3005
3006
3007 // java.lang.ref.Reference ///////////////////////////////////////////////////////////////
3008
3009
3010 JVM_ENTRY(jobject, JVM_GetAndClearReferencePendingList(JNIEnv* env))
3011 MonitorLocker ml(Heap_lock);
3012 oop ref = Universe::reference_pending_list();
3013 if (ref != nullptr) {
3014 Universe::clear_reference_pending_list();
3015 }
3016 return JNIHandles::make_local(THREAD, ref);
3017 JVM_END
3018
3019 JVM_ENTRY(jboolean, JVM_HasReferencePendingList(JNIEnv* env))
3020 MonitorLocker ml(Heap_lock);
3021 return Universe::has_reference_pending_list();
3022 JVM_END
3023
3024 JVM_ENTRY(void, JVM_WaitForReferencePendingList(JNIEnv* env))
3025 MonitorLocker ml(Heap_lock);
3026 while (!Universe::has_reference_pending_list()) {
3027 ml.wait();
3028 }
3029 JVM_END
3030
3031 JVM_ENTRY(jobject, JVM_ReferenceGet(JNIEnv* env, jobject ref))
3032 oop ref_oop = JNIHandles::resolve_non_null(ref);
3033 // PhantomReference has its own implementation of get().
3034 assert(!java_lang_ref_Reference::is_phantom(ref_oop), "precondition");
3035 oop referent = java_lang_ref_Reference::weak_referent(ref_oop);
3036 return JNIHandles::make_local(THREAD, referent);
3037 JVM_END
3038
3039 JVM_ENTRY(jboolean, JVM_ReferenceRefersTo(JNIEnv* env, jobject ref, jobject o))
3040 oop ref_oop = JNIHandles::resolve_non_null(ref);
3041 // PhantomReference has its own implementation of refersTo().
3042 // See: JVM_PhantomReferenceRefersTo
3043 assert(!java_lang_ref_Reference::is_phantom(ref_oop), "precondition");
3044 oop referent = java_lang_ref_Reference::weak_referent_no_keepalive(ref_oop);
3045 return referent == JNIHandles::resolve(o);
3046 JVM_END
3047
3048 JVM_ENTRY(void, JVM_ReferenceClear(JNIEnv* env, jobject ref))
3049 oop ref_oop = JNIHandles::resolve_non_null(ref);
3050 // FinalReference has it's own implementation of clear().
3051 assert(!java_lang_ref_Reference::is_final(ref_oop), "precondition");
3052 if (java_lang_ref_Reference::unknown_referent_no_keepalive(ref_oop) == nullptr) {
3053 // If the referent has already been cleared then done.
3054 // However, if the referent is dead but has not yet been cleared by
3055 // concurrent reference processing, it should NOT be cleared here.
3056 // Instead, clearing should be left to the GC. Clearing it here could
3057 // detectably lose an expected notification, which is impossible with
3058 // STW reference processing. The clearing in enqueue() doesn't have
3059 // this problem, since the enqueue covers the notification, but it's not
3060 // worth the effort to handle that case specially.
3061 return;
3062 }
3063 java_lang_ref_Reference::clear_referent(ref_oop);
3064 JVM_END
3065
3066
3067 // java.lang.ref.PhantomReference //////////////////////////////////////////////////
3068
3069
3070 JVM_ENTRY(jboolean, JVM_PhantomReferenceRefersTo(JNIEnv* env, jobject ref, jobject o))
3071 oop ref_oop = JNIHandles::resolve_non_null(ref);
3072 oop referent = java_lang_ref_Reference::phantom_referent_no_keepalive(ref_oop);
3073 return referent == JNIHandles::resolve(o);
3074 JVM_END
3075
3076
3077 // ObjectInputStream ///////////////////////////////////////////////////////////////
3078
3079 // Return the first user-defined class loader up the execution stack, or null
3080 // if only code from the bootstrap or platform class loader is on the stack.
3081
3082 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3083 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3084 InstanceKlass* ik = vfst.method()->method_holder();
3085 oop loader = ik->class_loader();
3086 if (loader != nullptr && !SystemDictionary::is_platform_class_loader(loader)) {
3087 return JNIHandles::make_local(THREAD, loader);
3088 }
3089 }
3090 return nullptr;
3091 JVM_END
3092
3093
3094 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3095
3096
3097 // resolve array handle and check arguments
3098 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3099 if (arr == nullptr) {
3100 THROW_NULL(vmSymbols::java_lang_NullPointerException());
3101 }
3102 oop a = JNIHandles::resolve_non_null(arr);
3103 if (!a->is_array()) {
3104 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3105 } else if (type_array_only && !a->is_typeArray()) {
3106 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array of primitive type");
3107 }
3108 return arrayOop(a);
3109 }
3110
3111
3112 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3113 arrayOop a = check_array(env, arr, false, CHECK_0);
3114 return a->length();
3115 JVM_END
3116
3117
3118 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3119 JvmtiVMObjectAllocEventCollector oam;
3120 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3121 jvalue value;
3122 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3123 oop box = Reflection::box(&value, type, CHECK_NULL);
3124 return JNIHandles::make_local(THREAD, box);
3125 JVM_END
3126
3127
3128 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3129 jvalue value;
3130 value.i = 0; // to initialize value before getting used in CHECK
3131 arrayOop a = check_array(env, arr, true, CHECK_(value));
3132 assert(a->is_typeArray(), "just checking");
3133 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3134 BasicType wide_type = (BasicType) wCode;
3135 if (type != wide_type) {
3136 Reflection::widen(&value, type, wide_type, CHECK_(value));
3137 }
3138 return value;
3139 JVM_END
3140
3141
3142 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3143 arrayOop a = check_array(env, arr, false, CHECK);
3144 oop box = JNIHandles::resolve(val);
3145 jvalue value;
3146 value.i = 0; // to initialize value before getting used in CHECK
3147 BasicType value_type;
3148 if (a->is_objArray()) {
3149 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3150 value_type = Reflection::unbox_for_regular_object(box, &value);
3151 } else {
3152 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3153 }
3154 Reflection::array_set(&value, a, index, value_type, CHECK);
3155 JVM_END
3156
3157
3158 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3159 arrayOop a = check_array(env, arr, true, CHECK);
3160 assert(a->is_typeArray(), "just checking");
3161 BasicType value_type = (BasicType) vCode;
3162 Reflection::array_set(&v, a, index, value_type, CHECK);
3163 JVM_END
3164
3165
3166 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3167 JvmtiVMObjectAllocEventCollector oam;
3168 oop element_mirror = JNIHandles::resolve(eltClass);
3169 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3170 return JNIHandles::make_local(THREAD, result);
3171 JVM_END
3172
3173
3174 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3175 JvmtiVMObjectAllocEventCollector oam;
3176 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3177 oop element_mirror = JNIHandles::resolve(eltClass);
3178 assert(dim_array->is_typeArray(), "just checking");
3179 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3180 return JNIHandles::make_local(THREAD, result);
3181 JVM_END
3182
3183
3184 // Library support ///////////////////////////////////////////////////////////////////////////
3185
3186 JVM_LEAF(void*, JVM_LoadZipLibrary())
3187 return ZipLibrary::handle();
3188 JVM_END
3189
3190 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name, jboolean throwException))
3191 //%note jvm_ct
3192 char ebuf[1024];
3193 void *load_result;
3194 {
3195 ThreadToNativeFromVM ttnfvm(thread);
3196 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3197 }
3198 if (load_result == nullptr) {
3199 if (throwException) {
3200 char msg[1024];
3201 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3202 // Since 'ebuf' may contain a string encoded using
3203 // platform encoding scheme, we need to pass
3204 // Exceptions::unsafe_to_utf8 to the new_exception method
3205 // as the last argument. See bug 6367357.
3206 Handle h_exception =
3207 Exceptions::new_exception(thread,
3208 vmSymbols::java_lang_UnsatisfiedLinkError(),
3209 msg, Exceptions::unsafe_to_utf8);
3210
3211 THROW_HANDLE_NULL(h_exception);
3212 } else {
3213 log_info(library)("Failed to load library %s", name);
3214 return load_result;
3215 }
3216 }
3217 log_info(library)("Loaded library %s, handle " INTPTR_FORMAT, name, p2i(load_result));
3218 return load_result;
3219 JVM_END
3220
3221
3222 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3223 os::dll_unload(handle);
3224 log_info(library)("Unloaded library with handle " INTPTR_FORMAT, p2i(handle));
3225 JVM_END
3226
3227
3228 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3229 void* find_result = os::dll_lookup(handle, name);
3230 log_info(library)("%s %s in library with handle " INTPTR_FORMAT,
3231 find_result != nullptr ? "Found" : "Failed to find",
3232 name, p2i(handle));
3233 return find_result;
3234 JVM_END
3235
3236
3237 // JNI version ///////////////////////////////////////////////////////////////////////////////
3238
3239 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3240 return Threads::is_supported_jni_version_including_1_1(version);
3241 JVM_END
3242
3243
3244 JVM_LEAF(jboolean, JVM_IsPreviewEnabled(void))
3245 return Arguments::enable_preview() ? JNI_TRUE : JNI_FALSE;
3246 JVM_END
3247
3248 JVM_LEAF(jboolean, JVM_IsContinuationsSupported(void))
3249 return VMContinuations ? JNI_TRUE : JNI_FALSE;
3250 JVM_END
3251
3252 JVM_LEAF(jboolean, JVM_IsForeignLinkerSupported(void))
3253 return ForeignGlobals::is_foreign_linker_supported() ? JNI_TRUE : JNI_FALSE;
3254 JVM_END
3255
3256 JVM_LEAF(jboolean, JVM_IsStaticallyLinked(void))
3257 return is_vm_statically_linked() ? JNI_TRUE : JNI_FALSE;
3258 JVM_END
3259
3260 // String support ///////////////////////////////////////////////////////////////////////////
3261
3262 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3263 JvmtiVMObjectAllocEventCollector oam;
3264 if (str == nullptr) return nullptr;
3265 oop string = JNIHandles::resolve_non_null(str);
3266 oop result = StringTable::intern(string, CHECK_NULL);
3267 return (jstring) JNIHandles::make_local(THREAD, result);
3268 JVM_END
3269
3270
3271 // VM Raw monitor support //////////////////////////////////////////////////////////////////////
3272
3273 // VM Raw monitors (not to be confused with JvmtiRawMonitors) are a simple mutual exclusion
3274 // lock (not actually monitors: no wait/notify) that is exported by the VM for use by JDK
3275 // library code. They may be used by JavaThreads and non-JavaThreads and do not participate
3276 // in the safepoint protocol, thread suspension, thread interruption, or most things of that
3277 // nature, except JavaThreads will be blocked by VM_Exit::block_if_vm_exited if the VM has
3278 // shutdown. JavaThreads will be "in native" when using this API from JDK code.
3279
3280
3281 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3282 VM_Exit::block_if_vm_exited();
3302 ((PlatformMutex*) mon)->unlock();
3303 }
3304
3305
3306 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
3307
3308 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init,
3309 Handle loader, jboolean throwError, TRAPS) {
3310 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, throwError != 0, CHECK_NULL);
3311
3312 // Check if we should initialize the class
3313 if (init && klass->is_instance_klass()) {
3314 klass->initialize(CHECK_NULL);
3315 }
3316 return (jclass) JNIHandles::make_local(THREAD, klass->java_mirror());
3317 }
3318
3319
3320 // Method ///////////////////////////////////////////////////////////////////////////////////////////
3321
3322 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
3323 Handle method_handle;
3324 if (thread->stack_overflow_state()->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
3325 method_handle = Handle(THREAD, JNIHandles::resolve(method));
3326 Handle receiver(THREAD, JNIHandles::resolve(obj));
3327 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3328 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
3329 jobject res = JNIHandles::make_local(THREAD, result);
3330 if (JvmtiExport::should_post_vm_object_alloc()) {
3331 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
3332 assert(ret_type != nullptr, "sanity check: ret_type oop must not be null!");
3333 if (java_lang_Class::is_primitive(ret_type)) {
3334 // Only for primitive type vm allocates memory for java object.
3335 // See box() method.
3336 JvmtiExport::post_vm_object_alloc(thread, result);
3337 }
3338 }
3339 return res;
3340 } else {
3341 THROW_NULL(vmSymbols::java_lang_StackOverflowError());
3342 }
3343 JVM_END
3344
3345
3346 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
3347 oop constructor_mirror = JNIHandles::resolve(c);
3348 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3349 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
3350 jobject res = JNIHandles::make_local(THREAD, result);
3351 if (JvmtiExport::should_post_vm_object_alloc()) {
3352 JvmtiExport::post_vm_object_alloc(thread, result);
3353 }
3354 return res;
3355 JVM_END
3356
3357 JVM_ENTRY(void, JVM_InitializeFromArchive(JNIEnv* env, jclass cls))
3358 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
3359 HeapShared::initialize_from_archived_subgraph(THREAD, k);
3360 JVM_END
3361
3362 JVM_ENTRY(void, JVM_RegisterLambdaProxyClassForArchiving(JNIEnv* env,
3363 jclass caller,
3364 jstring interfaceMethodName,
3365 jobject factoryType,
3366 jobject interfaceMethodType,
3367 jobject implementationMember,
3368 jobject dynamicMethodType,
3369 jclass lambdaProxyClass))
3370 #if INCLUDE_CDS
3371 if (!CDSConfig::is_dumping_archive() || !CDSConfig::is_dumping_lambdas_in_legacy_mode()) {
3372 return;
3373 }
3374
3375 Klass* caller_k = java_lang_Class::as_Klass(JNIHandles::resolve(caller));
3376 InstanceKlass* caller_ik = InstanceKlass::cast(caller_k);
3377 if (caller_ik->is_hidden()) {
3378 // Hidden classes not of type lambda proxy classes are currently not being archived.
3379 // If the caller_ik is of one of the above types, the corresponding lambda proxy class won't be
3380 // registered for archiving.
3381 return;
3382 }
3390 interface_method_name = java_lang_String::as_symbol(JNIHandles::resolve_non_null(interfaceMethodName));
3391 }
3392 Handle factory_type_oop(THREAD, JNIHandles::resolve_non_null(factoryType));
3393 Symbol* factory_type = java_lang_invoke_MethodType::as_signature(factory_type_oop(), true);
3394
3395 Handle interface_method_type_oop(THREAD, JNIHandles::resolve_non_null(interfaceMethodType));
3396 Symbol* interface_method_type = java_lang_invoke_MethodType::as_signature(interface_method_type_oop(), true);
3397
3398 Handle implementation_member_oop(THREAD, JNIHandles::resolve_non_null(implementationMember));
3399 assert(java_lang_invoke_MemberName::is_method(implementation_member_oop()), "must be");
3400 Method* m = java_lang_invoke_MemberName::vmtarget(implementation_member_oop());
3401
3402 Handle dynamic_method_type_oop(THREAD, JNIHandles::resolve_non_null(dynamicMethodType));
3403 Symbol* dynamic_method_type = java_lang_invoke_MethodType::as_signature(dynamic_method_type_oop(), true);
3404
3405 LambdaProxyClassDictionary::add_lambda_proxy_class(caller_ik, lambda_ik, interface_method_name, factory_type,
3406 interface_method_type, m, dynamic_method_type, THREAD);
3407 #endif // INCLUDE_CDS
3408 JVM_END
3409
3410 JVM_ENTRY(jclass, JVM_LookupLambdaProxyClassFromArchive(JNIEnv* env,
3411 jclass caller,
3412 jstring interfaceMethodName,
3413 jobject factoryType,
3414 jobject interfaceMethodType,
3415 jobject implementationMember,
3416 jobject dynamicMethodType))
3417 #if INCLUDE_CDS
3418
3419 if (interfaceMethodName == nullptr || factoryType == nullptr || interfaceMethodType == nullptr ||
3420 implementationMember == nullptr || dynamicMethodType == nullptr) {
3421 THROW_(vmSymbols::java_lang_NullPointerException(), nullptr);
3422 }
3423
3424 Klass* caller_k = java_lang_Class::as_Klass(JNIHandles::resolve(caller));
3425 InstanceKlass* caller_ik = InstanceKlass::cast(caller_k);
3426 if (!caller_ik->in_aot_cache()) {
3427 // there won't be a shared lambda class if the caller_ik is not in the shared archive.
3428 return nullptr;
3429 }
3430
3435 Handle interface_method_type_oop(THREAD, JNIHandles::resolve_non_null(interfaceMethodType));
3436 Symbol* interface_method_type = java_lang_invoke_MethodType::as_signature(interface_method_type_oop(), true);
3437
3438 Handle implementation_member_oop(THREAD, JNIHandles::resolve_non_null(implementationMember));
3439 assert(java_lang_invoke_MemberName::is_method(implementation_member_oop()), "must be");
3440 Method* m = java_lang_invoke_MemberName::vmtarget(implementation_member_oop());
3441
3442 Handle dynamic_method_type_oop(THREAD, JNIHandles::resolve_non_null(dynamicMethodType));
3443 Symbol* dynamic_method_type = java_lang_invoke_MethodType::as_signature(dynamic_method_type_oop(), true);
3444
3445 InstanceKlass* loaded_lambda =
3446 LambdaProxyClassDictionary::load_shared_lambda_proxy_class(caller_ik, interface_method_name, factory_type,
3447 interface_method_type, m, dynamic_method_type,
3448 CHECK_(nullptr));
3449 return loaded_lambda == nullptr ? nullptr : (jclass) JNIHandles::make_local(THREAD, loaded_lambda->java_mirror());
3450 #else
3451 return nullptr;
3452 #endif // INCLUDE_CDS
3453 JVM_END
3454
3455 JVM_ENTRY_NO_ENV(jlong, JVM_GetRandomSeedForDumping())
3456 if (CDSConfig::is_dumping_static_archive()) {
3457 // We do this so that the default CDS archive can be deterministic.
3458 const char* release = VM_Version::vm_release();
3459 const char* dbg_level = VM_Version::jdk_debug_level();
3460 const char* version = VM_Version::internal_vm_info_string();
3461 jlong seed = (jlong)(java_lang_String::hash_code((const jbyte*)release, (int)strlen(release)) ^
3462 java_lang_String::hash_code((const jbyte*)dbg_level, (int)strlen(dbg_level)) ^
3463 java_lang_String::hash_code((const jbyte*)version, (int)strlen(version)));
3464 seed += (jlong)VM_Version::vm_major_version();
3465 seed += (jlong)VM_Version::vm_minor_version();
3466 seed += (jlong)VM_Version::vm_security_version();
3467 seed += (jlong)VM_Version::vm_patch_version();
3468 if (seed == 0) { // don't let this ever be zero.
3469 seed = 0x87654321;
3470 }
3471 log_debug(aot)("JVM_GetRandomSeedForDumping() = " JLONG_FORMAT, seed);
3472 return seed;
3473 } else {
3474 return 0;
3475 }
3476 JVM_END
3477
3478 JVM_ENTRY_NO_ENV(jint, JVM_GetCDSConfigStatus())
3479 return CDSConfig::get_status();
3480 JVM_END
3481
3482 JVM_ENTRY(void, JVM_LogLambdaFormInvoker(JNIEnv *env, jstring line))
3483 #if INCLUDE_CDS
3484 assert(CDSConfig::is_logging_lambda_form_invokers(), "sanity");
3485 if (line != nullptr) {
3486 ResourceMark rm(THREAD);
3487 Handle h_line (THREAD, JNIHandles::resolve_non_null(line));
3488 char* c_line = java_lang_String::as_utf8_string(h_line());
3489 if (CDSConfig::is_dumping_dynamic_archive()) {
3490 // Note: LambdaFormInvokers::append take same format which is not
3491 // same as below the print format. The line does not include LAMBDA_FORM_TAG.
3492 LambdaFormInvokers::append(os::strdup((const char*)c_line, mtInternal));
3493 }
3494 if (ClassListWriter::is_enabled()) {
3495 ClassListWriter w;
3496 w.stream()->print_cr("%s %s", ClassListParser::lambda_form_tag(), c_line);
3497 }
3498 }
3499 #endif // INCLUDE_CDS
3500 JVM_END
3501
3502 JVM_ENTRY(void, JVM_DumpClassListToFile(JNIEnv *env, jstring listFileName))
3503 #if INCLUDE_CDS
3504 ResourceMark rm(THREAD);
3505 Handle file_handle(THREAD, JNIHandles::resolve_non_null(listFileName));
3506 char* file_name = java_lang_String::as_utf8_string(file_handle());
3507 AOTMetaspace::dump_loaded_classes(file_name, THREAD);
3508 #endif // INCLUDE_CDS
3509 JVM_END
3510
3511 JVM_ENTRY(void, JVM_DumpDynamicArchive(JNIEnv *env, jstring archiveName))
3512 #if INCLUDE_CDS
3513 ResourceMark rm(THREAD);
3514 Handle file_handle(THREAD, JNIHandles::resolve_non_null(archiveName));
3515 char* archive_name = java_lang_String::as_utf8_string(file_handle());
3516 DynamicArchive::dump_for_jcmd(archive_name, CHECK);
3517 #endif // INCLUDE_CDS
3518 JVM_END
3519
3520 JVM_ENTRY(jboolean, JVM_NeedsClassInitBarrierForCDS(JNIEnv* env, jclass cls))
3521 #if INCLUDE_CDS
3522 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
3523 if (!k->is_instance_klass()) {
3524 return false;
3525 } else {
3526 if (InstanceKlass::cast(k)->is_enum_subclass() ||
3527 AOTClassInitializer::can_archive_initialized_mirror(InstanceKlass::cast(k))) {
3528 // This class will be cached in AOT-initialized state. No need for init barriers.
3529 return false;
3530 } else {
3531 // If we cannot cache the class in AOT-initialized state, java.lang.invoke handles
3532 // must emit barriers to ensure class initialization during production run.
3533 ResourceMark rm(THREAD);
3534 log_debug(aot)("NeedsClassInitBarrierForCDS: %s", k->external_name());
3535 return true;
3536 }
3537 }
3538 #else
3539 return false;
3540 #endif // INCLUDE_CDS
3541 JVM_END
3542
3543 // Returns an array of all live Thread objects (VM internal JavaThreads,
3544 // jvmti agent threads, and JNI attaching threads are skipped)
3545 // See CR 6404306 regarding JNI attaching threads
3546 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
3547 ResourceMark rm(THREAD);
3548 ThreadsListEnumerator tle(THREAD, false, false);
3549 JvmtiVMObjectAllocEventCollector oam;
3550
3551 int num_threads = tle.num_threads();
3552 objArrayOop r = oopFactory::new_objArray(vmClasses::Thread_klass(), num_threads, CHECK_NULL);
3553 objArrayHandle threads_ah(THREAD, r);
3554
3555 for (int i = 0; i < num_threads; i++) {
3556 Handle h = tle.get_threadObj(i);
3557 threads_ah->obj_at_put(i, h());
3558 }
3559
3560 return (jobjectArray) JNIHandles::make_local(THREAD, threads_ah());
3561 JVM_END
3562
3563
3564 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
3565 // Return StackTraceElement[][], each element is the stack trace of a thread in
3566 // the corresponding entry in the given threads array
3567 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
3568 JvmtiVMObjectAllocEventCollector oam;
3569
3570 // Check if threads is null
3571 if (threads == nullptr) {
3572 THROW_NULL(vmSymbols::java_lang_NullPointerException());
3573 }
3574
3575 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
3576 objArrayHandle ah(THREAD, a);
3577 int num_threads = ah->length();
3578 // check if threads is non-empty array
3579 if (num_threads == 0) {
3580 THROW_NULL(vmSymbols::java_lang_IllegalArgumentException());
3581 }
3582
3583 // check if threads is not an array of objects of Thread class
3584 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
3585 if (k != vmClasses::Thread_klass()) {
3586 THROW_NULL(vmSymbols::java_lang_IllegalArgumentException());
3587 }
3588
3589 ResourceMark rm(THREAD);
3590
3591 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
3592 for (int i = 0; i < num_threads; i++) {
3593 oop thread_obj = ah->obj_at(i);
3594 instanceHandle h(THREAD, (instanceOop) thread_obj);
3595 thread_handle_array->append(h);
3596 }
3597
3598 // The JavaThread references in thread_handle_array are validated
3599 // in VM_ThreadDump::doit().
3600 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
3601 return (jobjectArray)JNIHandles::make_local(THREAD, stacktraces());
3602
3603 JVM_END
3604
3605 // JVM monitoring and management support
3606 JVM_LEAF(void*, JVM_GetManagement(jint version))
3607 return Management::get_jmm_interface(version);
3608 JVM_END
3609
3610 // com.sun.tools.attach.VirtualMachine agent properties support
3611 //
3612 // Initialize the agent properties with the properties maintained in the VM
3613 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
3614 ResourceMark rm;
3615
3616 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
3617
3618 PUTPROP(props, "sun.java.command", Arguments::java_command());
3619 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
3620 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
3621 return properties;
3622 JVM_END
3623
3624 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
3625 {
3626 JvmtiVMObjectAllocEventCollector oam;
3627
3628 if (ofClass == nullptr) {
3629 return nullptr;
3630 }
3631 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
3632 // Special handling for primitive objects
3633 if (java_lang_Class::is_primitive(mirror())) {
3634 return nullptr;
3635 }
3636 Klass* k = java_lang_Class::as_Klass(mirror());
3637 if (!k->is_instance_klass()) {
3638 return nullptr;
3639 }
3640 InstanceKlass* ik = InstanceKlass::cast(k);
3641 int encl_method_class_idx = ik->enclosing_method_class_index();
3642 if (encl_method_class_idx == 0) {
3643 return nullptr;
3644 }
3647 Klass* enc_k = ik->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
3648 dest->obj_at_put(0, enc_k->java_mirror());
3649 int encl_method_method_idx = ik->enclosing_method_method_index();
3650 if (encl_method_method_idx != 0) {
3651 Symbol* sym = ik->constants()->symbol_at(
3652 extract_low_short_from_int(
3653 ik->constants()->name_and_type_at(encl_method_method_idx)));
3654 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3655 dest->obj_at_put(1, str());
3656 sym = ik->constants()->symbol_at(
3657 extract_high_short_from_int(
3658 ik->constants()->name_and_type_at(encl_method_method_idx)));
3659 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3660 dest->obj_at_put(2, str());
3661 }
3662 return (jobjectArray) JNIHandles::make_local(THREAD, dest());
3663 }
3664 JVM_END
3665
3666 // Returns an array of java.lang.String objects containing the input arguments to the VM.
3667 JVM_ENTRY(jobjectArray, JVM_GetVmArguments(JNIEnv *env))
3668 ResourceMark rm(THREAD);
3669
3670 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) {
3671 return nullptr;
3672 }
3673
3674 char** vm_flags = Arguments::jvm_flags_array();
3675 char** vm_args = Arguments::jvm_args_array();
3676 int num_flags = Arguments::num_jvm_flags();
3677 int num_args = Arguments::num_jvm_args();
3678
3679 InstanceKlass* ik = vmClasses::String_klass();
3680 objArrayOop r = oopFactory::new_objArray(ik, num_args + num_flags, CHECK_NULL);
3681 objArrayHandle result_h(THREAD, r);
3682
3683 int index = 0;
3684 for (int j = 0; j < num_flags; j++, index++) {
3685 Handle h = java_lang_String::create_from_platform_dependent_str(vm_flags[j], CHECK_NULL);
3686 result_h->obj_at_put(index, h());
3687 }
3688 for (int i = 0; i < num_args; i++, index++) {
3689 Handle h = java_lang_String::create_from_platform_dependent_str(vm_args[i], CHECK_NULL);
3690 result_h->obj_at_put(index, h());
3691 }
3692 return (jobjectArray) JNIHandles::make_local(THREAD, result_h());
3693 JVM_END
3694
3695 JVM_LEAF(jint, JVM_FindSignal(const char *name))
3696 return os::get_signal_number(name);
3697 JVM_END
3698
3699 JVM_ENTRY(void, JVM_VirtualThreadStart(JNIEnv* env, jobject vthread))
3700 #if INCLUDE_JVMTI
3701 if (!DoJVMTIVirtualThreadTransitions) {
3702 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
3703 return;
3704 }
3705 if (JvmtiVTMSTransitionDisabler::VTMS_notify_jvmti_events()) {
3706 JvmtiVTMSTransitionDisabler::VTMS_vthread_start(vthread);
3707 } else {
3708 // set VTMS transition bit value in JavaThread and java.lang.VirtualThread object
3709 JvmtiVTMSTransitionDisabler::set_is_in_VTMS_transition(thread, vthread, false);
3710 }
3711 #endif
3712 JVM_END
3713
3714 JVM_ENTRY(void, JVM_VirtualThreadEnd(JNIEnv* env, jobject vthread))
3715 #if INCLUDE_JVMTI
3716 if (!DoJVMTIVirtualThreadTransitions) {
3717 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
3718 return;
3719 }
3720 if (JvmtiVTMSTransitionDisabler::VTMS_notify_jvmti_events()) {
3721 JvmtiVTMSTransitionDisabler::VTMS_vthread_end(vthread);
3722 } else {
3723 // set VTMS transition bit value in JavaThread and java.lang.VirtualThread object
3724 JvmtiVTMSTransitionDisabler::set_is_in_VTMS_transition(thread, vthread, true);
3725 }
3726 #endif
3727 JVM_END
3728
3729 // If notifications are disabled then just update the VTMS transition bit and return.
3730 // Otherwise, the bit is updated in the given jvmtiVTMSTransitionDisabler function call.
3731 JVM_ENTRY(void, JVM_VirtualThreadMount(JNIEnv* env, jobject vthread, jboolean hide))
3732 #if INCLUDE_JVMTI
3733 if (!DoJVMTIVirtualThreadTransitions) {
3734 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
3735 return;
3736 }
3737 if (JvmtiVTMSTransitionDisabler::VTMS_notify_jvmti_events()) {
3738 JvmtiVTMSTransitionDisabler::VTMS_vthread_mount(vthread, hide);
3739 } else {
3740 // set VTMS transition bit value in JavaThread and java.lang.VirtualThread object
3741 JvmtiVTMSTransitionDisabler::set_is_in_VTMS_transition(thread, vthread, hide);
3742 }
3743 #endif
3744 JVM_END
3745
3746 // If notifications are disabled then just update the VTMS transition bit and return.
3747 // Otherwise, the bit is updated in the given jvmtiVTMSTransitionDisabler function call below.
3748 JVM_ENTRY(void, JVM_VirtualThreadUnmount(JNIEnv* env, jobject vthread, jboolean hide))
3749 #if INCLUDE_JVMTI
3750 if (!DoJVMTIVirtualThreadTransitions) {
3751 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
3752 return;
3753 }
3754 if (JvmtiVTMSTransitionDisabler::VTMS_notify_jvmti_events()) {
3755 JvmtiVTMSTransitionDisabler::VTMS_vthread_unmount(vthread, hide);
3756 } else {
3757 // set VTMS transition bit value in JavaThread and java.lang.VirtualThread object
3758 JvmtiVTMSTransitionDisabler::set_is_in_VTMS_transition(thread, vthread, hide);
3759 }
3760 #endif
3761 JVM_END
3762
3763 // Notification from VirtualThread about disabling JVMTI Suspend in a sync critical section.
3764 // Needed to avoid deadlocks with JVMTI suspend mechanism.
3765 JVM_ENTRY(void, JVM_VirtualThreadDisableSuspend(JNIEnv* env, jclass clazz, jboolean enter))
3766 #if INCLUDE_JVMTI
3767 if (!DoJVMTIVirtualThreadTransitions) {
3768 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
3795 OopHandle& list_head = ObjectMonitor::vthread_list_head();
3796 oop vthread_head = nullptr;
3797 while (true) {
3798 if (list_head.peek() != nullptr) {
3799 for (;;) {
3800 oop head = list_head.resolve();
3801 if (list_head.cmpxchg(head, nullptr) == head) {
3802 return JNIHandles::make_local(THREAD, head);
3803 }
3804 }
3805 }
3806 ThreadBlockInVM tbivm(THREAD);
3807 parkEvent->park();
3808 }
3809 JVM_END
3810 /*
3811 * Return the current class's class file version. The low order 16 bits of the
3812 * returned jint contain the class's major version. The high order 16 bits
3813 * contain the class's minor version.
3814 */
3815 JVM_ENTRY(jint, JVM_GetClassFileVersion(JNIEnv* env, jclass current))
3816 oop mirror = JNIHandles::resolve_non_null(current);
3817 if (java_lang_Class::is_primitive(mirror)) {
3818 // return latest major version and minor version of 0.
3819 return JVM_CLASSFILE_MAJOR_VERSION;
3820 }
3821 assert(!java_lang_Class::as_Klass(mirror)->is_array_klass(), "unexpected array class");
3822
3823 Klass* c = java_lang_Class::as_Klass(mirror);
3824 assert(c->is_instance_klass(), "must be");
3825 InstanceKlass* ik = InstanceKlass::cast(c);
3826 return (ik->minor_version() << 16) | ik->major_version();
3827 JVM_END
3828
3829 /*
3830 * Ensure that code doing a stackwalk and using javaVFrame::locals() to
3831 * get the value will see a materialized value and not a scalar-replaced
3832 * null value.
3833 */
3834 JVM_ENTRY(void, JVM_EnsureMaterializedForStackWalk_func(JNIEnv* env, jobject vthread, jobject value))
3835 JVM_EnsureMaterializedForStackWalk(env, value);
3836 JVM_END
3837
3838 /*
3839 * Return JNI_TRUE if warnings are printed when agents are dynamically loaded.
3840 */
3841 JVM_LEAF(jboolean, JVM_PrintWarningAtDynamicAgentLoad(void))
3842 return (EnableDynamicAgentLoading && !FLAG_IS_CMDLINE(EnableDynamicAgentLoading)) ? JNI_TRUE : JNI_FALSE;
3843 JVM_END
|
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
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 "cds/aotClassInitializer.hpp"
26 #include "cds/aotConstantPoolResolver.hpp"
27 #include "cds/aotMetaspace.hpp"
28 #include "cds/cdsConfig.hpp"
29 #include "cds/classListParser.hpp"
30 #include "cds/classListWriter.hpp"
31 #include "cds/dynamicArchive.hpp"
32 #include "cds/heapShared.hpp"
33 #include "cds/lambdaFormInvokers.hpp"
34 #include "cds/lambdaProxyClassDictionary.hpp"
35 #include "classfile/classFileStream.hpp"
36 #include "classfile/classLoader.inline.hpp"
37 #include "classfile/classLoaderData.inline.hpp"
38 #include "classfile/classLoadInfo.hpp"
39 #include "classfile/javaAssertions.hpp"
40 #include "classfile/javaClasses.inline.hpp"
41 #include "classfile/moduleEntry.hpp"
42 #include "classfile/modules.hpp"
43 #include "classfile/packageEntry.hpp"
44 #include "classfile/stringTable.hpp"
45 #include "classfile/symbolTable.hpp"
46 #include "classfile/systemDictionary.hpp"
70 #include "prims/jvm_misc.hpp"
71 #include "prims/jvmtiExport.hpp"
72 #include "prims/jvmtiThreadState.inline.hpp"
73 #include "prims/stackwalk.hpp"
74 #include "runtime/arguments.hpp"
75 #include "runtime/atomic.hpp"
76 #include "runtime/continuation.hpp"
77 #include "runtime/deoptimization.hpp"
78 #include "runtime/globals_extension.hpp"
79 #include "runtime/handles.inline.hpp"
80 #include "runtime/handshake.hpp"
81 #include "runtime/init.hpp"
82 #include "runtime/interfaceSupport.inline.hpp"
83 #include "runtime/java.hpp"
84 #include "runtime/javaCalls.hpp"
85 #include "runtime/javaThread.hpp"
86 #include "runtime/jfieldIDWorkaround.hpp"
87 #include "runtime/jniHandles.inline.hpp"
88 #include "runtime/os.inline.hpp"
89 #include "runtime/osThread.hpp"
90 #include "runtime/perfData.inline.hpp"
91 #include "runtime/reflection.hpp"
92 #include "runtime/synchronizer.hpp"
93 #include "runtime/threadIdentifier.hpp"
94 #include "runtime/threadSMR.hpp"
95 #include "runtime/vframe.inline.hpp"
96 #include "runtime/vm_version.hpp"
97 #include "runtime/vmOperations.hpp"
98 #include "services/attachListener.hpp"
99 #include "services/management.hpp"
100 #include "services/threadService.hpp"
101 #include "utilities/checkedCast.hpp"
102 #include "utilities/copy.hpp"
103 #include "utilities/defaultStream.hpp"
104 #include "utilities/dtrace.hpp"
105 #include "utilities/events.hpp"
106 #include "utilities/macros.hpp"
107 #include "utilities/utf8.hpp"
108 #include "utilities/zipLibrary.hpp"
109 #if INCLUDE_CDS
110 #include "classfile/systemDictionaryShared.hpp"
213 }
214 }
215 }
216 if (caller != nullptr) {
217 if (to_class != caller) {
218 const char * from = caller->external_name();
219 const char * to = to_class->external_name();
220 // print in a single call to reduce interleaving between threads
221 if (source_file != nullptr) {
222 log_debug(class, resolve)("%s %s %s:%d (%s)", from, to, source_file, line_number, trace);
223 } else {
224 log_debug(class, resolve)("%s %s (%s)", from, to, trace);
225 }
226 }
227 }
228 }
229
230 // java.lang.System //////////////////////////////////////////////////////////////////////
231
232
233 JVM_LEAF_PROF(jboolean, JVM_AOTIsTraining, JVM_AOTIsTraining(JNIEnv *env))
234 #if INCLUDE_CDS
235 return AOTMetaspace::is_recording_preimage_static_archive();
236 #else
237 return JNI_FALSE;
238 #endif // INCLUDE_CDS
239 JVM_END
240
241 JVM_ENTRY_PROF(jboolean, JVM_AOTEndTraining, JVM_AOTEndTraining(JNIEnv *env))
242 #if INCLUDE_CDS
243 if (AOTMetaspace::is_recording_preimage_static_archive()) {
244 AOTMetaspace::preload_and_dump(THREAD);
245 return JNI_TRUE;
246 }
247 return JNI_FALSE;
248 #else
249 return JNI_FALSE;
250 #endif // INCLUDE_CDS
251 JVM_END
252
253 JVM_ENTRY_PROF(jstring, JVM_AOTGetMode, JVM_AOTGetMode(JNIEnv *env))
254 HandleMark hm(THREAD);
255 #if INCLUDE_CDS
256 const char* mode = AOTMode == nullptr ? "auto" : AOTMode;
257 Handle h = java_lang_String::create_from_platform_dependent_str(mode, CHECK_NULL);
258 return (jstring) JNIHandles::make_local(THREAD, h());
259 #else
260 return nullptr;
261 #endif // INCLUDE_CDS
262 JVM_END
263
264 JVM_LEAF_PROF(jlong, JVM_AOTGetRecordingDuration, JVM_AOTGetRecordingDuration(JNIEnv *env))
265 #if INCLUDE_CDS
266 return AOTMetaspace::get_preimage_static_archive_recording_duration();
267 #else
268 return 0;
269 #endif // INCLUDE_CDS
270 JVM_END
271
272 JVM_LEAF_PROF(jlong, JVM_CurrentTimeMillis, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
273 return os::javaTimeMillis();
274 JVM_END
275
276 JVM_LEAF_PROF(jlong, JVM_NanoTime, JVM_NanoTime(JNIEnv *env, jclass ignored))
277 return os::javaTimeNanos();
278 JVM_END
279
280 // The function below is actually exposed by jdk.internal.misc.VM and not
281 // java.lang.System, but we choose to keep it here so that it stays next
282 // to JVM_CurrentTimeMillis and JVM_NanoTime
283
284 const jlong MAX_DIFF_SECS = CONST64(0x0100000000); // 2^32
285 const jlong MIN_DIFF_SECS = -MAX_DIFF_SECS; // -2^32
286
287 JVM_LEAF_PROF(jlong, JVM_GetNanoTimeAdjustment, JVM_GetNanoTimeAdjustment(JNIEnv *env, jclass ignored, jlong offset_secs))
288 jlong seconds;
289 jlong nanos;
290
291 os::javaTimeSystemUTC(seconds, nanos);
292
293 // We're going to verify that the result can fit in a long.
294 // For that we need the difference in seconds between 'seconds'
295 // and 'offset_secs' to be such that:
296 // |seconds - offset_secs| < (2^63/10^9)
297 // We're going to approximate 10^9 ~< 2^30 (1000^3 ~< 1024^3)
298 // which makes |seconds - offset_secs| < 2^33
299 // and we will prefer +/- 2^32 as the maximum acceptable diff
300 // as 2^32 has a more natural feel than 2^33...
301 //
302 // So if |seconds - offset_secs| >= 2^32 - we return a special
303 // sentinel value (-1) which the caller should take as an
304 // exception value indicating that the offset given to us is
305 // too far from range of the current time - leading to too big
306 // a nano adjustment. The caller is expected to recover by
307 // computing a more accurate offset and calling this method
308 // again. (For the record 2^32 secs is ~136 years, so that
309 // should rarely happen)
310 //
311 jlong diff = seconds - offset_secs;
312 if (diff >= MAX_DIFF_SECS || diff <= MIN_DIFF_SECS) {
313 return -1; // sentinel value: the offset is too far off the target
314 }
315
316 // return the adjustment. If you compute a time by adding
317 // this number of nanoseconds along with the number of seconds
318 // in the offset you should get the current UTC time.
319 return (diff * (jlong)1000000000) + nanos;
320 JVM_END
321
322 JVM_ENTRY_PROF(void, JVM_ArrayCopy, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
323 jobject dst, jint dst_pos, jint length))
324 // Check if we have null pointers
325 if (src == nullptr || dst == nullptr) {
326 THROW(vmSymbols::java_lang_NullPointerException());
327 }
328 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
329 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
330 assert(oopDesc::is_oop(s), "JVM_ArrayCopy: src not an oop");
331 assert(oopDesc::is_oop(d), "JVM_ArrayCopy: dst not an oop");
332 // Do copy
333 s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread);
334 JVM_END
335
336
337 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
338 JavaValue r(T_OBJECT);
339 // public synchronized Object put(Object key, Object value);
340 HandleMark hm(THREAD);
341 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK);
342 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != nullptr ? value : ""), CHECK);
343 JavaCalls::call_virtual(&r,
344 props,
345 vmClasses::Properties_klass(),
346 vmSymbols::put_name(),
347 vmSymbols::object_object_object_signature(),
348 key_str,
349 value_str,
350 THREAD);
351 }
352
353
354 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
355
356 /*
357 * Return all of the system properties in a Java String array with alternating
358 * names and values from the jvm SystemProperty.
359 * Which includes some internal and all commandline -D defined properties.
360 */
361 JVM_ENTRY_PROF(jobjectArray, JVM_GetProperties, JVM_GetProperties(JNIEnv *env))
362 ResourceMark rm(THREAD);
363 HandleMark hm(THREAD);
364 int ndx = 0;
365 int fixedCount = 2;
366
367 SystemProperty* p = Arguments::system_properties();
368 int count = Arguments::PropertyList_count(p);
369
370 // Allocate result String array
371 InstanceKlass* ik = vmClasses::String_klass();
372 objArrayOop r = oopFactory::new_objArray(ik, (count + fixedCount) * 2, CHECK_NULL);
373 objArrayHandle result_h(THREAD, r);
374
375 while (p != nullptr) {
376 const char * key = p->key();
377 if (strcmp(key, "sun.nio.MaxDirectMemorySize") != 0) {
378 const char * value = p->value();
379 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK_NULL);
380 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != nullptr ? value : ""), CHECK_NULL);
381 result_h->obj_at_put(ndx * 2, key_str());
429 Handle key_str = java_lang_String::create_from_platform_dependent_str("sun.management.compiler", CHECK_NULL);
430 Handle value_str = java_lang_String::create_from_platform_dependent_str(compiler_name, CHECK_NULL);
431 result_h->obj_at_put(ndx * 2, key_str());
432 result_h->obj_at_put(ndx * 2 + 1, value_str());
433 ndx++;
434 }
435 }
436
437 return (jobjectArray) JNIHandles::make_local(THREAD, result_h());
438 JVM_END
439
440
441 /*
442 * Return the temporary directory that the VM uses for the attach
443 * and perf data files.
444 *
445 * It is important that this directory is well-known and the
446 * same for all VM instances. It cannot be affected by configuration
447 * variables such as java.io.tmpdir.
448 */
449 JVM_ENTRY_PROF(jstring, JVM_GetTemporaryDirectory, JVM_GetTemporaryDirectory(JNIEnv *env))
450 HandleMark hm(THREAD);
451 const char* temp_dir = os::get_temp_directory();
452 Handle h = java_lang_String::create_from_platform_dependent_str(temp_dir, CHECK_NULL);
453 return (jstring) JNIHandles::make_local(THREAD, h());
454 JVM_END
455
456
457 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
458
459 extern volatile jint vm_created;
460
461 JVM_ENTRY_NO_ENV_PROF(void, JVM_BeforeHalt, JVM_BeforeHalt())
462 EventShutdown event;
463 if (event.should_commit()) {
464 event.set_reason("Shutdown requested from Java");
465 event.commit();
466 }
467 JVM_END
468
469
470 JVM_ENTRY_NO_ENV_PROF(void, JVM_Halt, JVM_Halt(jint code))
471 before_exit(thread, true);
472 vm_exit(code);
473 JVM_END
474
475
476 JVM_ENTRY_NO_ENV_PROF(void, JVM_GC, JVM_GC(void))
477 if (!DisableExplicitGC) {
478 EventSystemGC event;
479 event.set_invokedConcurrent(ExplicitGCInvokesConcurrent);
480 Universe::heap()->collect(GCCause::_java_lang_system_gc);
481 event.commit();
482 }
483 JVM_END
484
485
486 JVM_LEAF_PROF(jlong, JVM_MaxObjectInspectionAge, JVM_MaxObjectInspectionAge(void))
487 return Universe::heap()->millis_since_last_whole_heap_examined();
488 JVM_END
489
490
491 static inline jlong convert_size_t_to_jlong(size_t val) {
492 // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
493 NOT_LP64 (return (jlong)val;)
494 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
495 }
496
497 JVM_ENTRY_NO_ENV_PROF(jlong, JVM_TotalMemory, JVM_TotalMemory(void))
498 size_t n = Universe::heap()->capacity();
499 return convert_size_t_to_jlong(n);
500 JVM_END
501
502
503 JVM_ENTRY_NO_ENV_PROF(jlong, JVM_FreeMemory, JVM_FreeMemory(void))
504 size_t n = Universe::heap()->unused();
505 return convert_size_t_to_jlong(n);
506 JVM_END
507
508
509 JVM_ENTRY_NO_ENV_PROF(jlong, JVM_MaxMemory, JVM_MaxMemory(void))
510 size_t n = Universe::heap()->max_capacity();
511 return convert_size_t_to_jlong(n);
512 JVM_END
513
514
515 JVM_ENTRY_NO_ENV_PROF(jint, JVM_ActiveProcessorCount, JVM_ActiveProcessorCount(void))
516 return os::active_processor_count();
517 JVM_END
518
519 JVM_LEAF_PROF(jboolean, JVM_IsUseContainerSupport, JVM_IsUseContainerSupport(void))
520 #ifdef LINUX
521 if (UseContainerSupport) {
522 return JNI_TRUE;
523 }
524 #endif
525 return JNI_FALSE;
526 JVM_END
527
528 JVM_LEAF(jboolean, JVM_IsContainerized(void))
529 #ifdef LINUX
530 if (OSContainer::is_containerized()) {
531 return JNI_TRUE;
532 }
533 #endif
534 return JNI_FALSE;
535 JVM_END
536
537 // java.lang.Throwable //////////////////////////////////////////////////////
538
539 JVM_ENTRY_PROF(void, JVM_FillInStackTrace, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
540 Handle exception(thread, JNIHandles::resolve_non_null(receiver));
541 java_lang_Throwable::fill_in_stack_trace(exception);
542 JVM_END
543
544 // java.lang.NullPointerException ///////////////////////////////////////////
545
546 JVM_ENTRY_PROF(jstring, JVM_GetExtendedNPEMessage, JVM_GetExtendedNPEMessage(JNIEnv *env, jthrowable throwable))
547 if (!ShowCodeDetailsInExceptionMessages) return nullptr;
548
549 oop exc = JNIHandles::resolve_non_null(throwable);
550
551 Method* method;
552 int bci;
553 if (!java_lang_Throwable::get_top_method_and_bci(exc, &method, &bci)) {
554 return nullptr;
555 }
556 if (method->is_native()) {
557 return nullptr;
558 }
559
560 stringStream ss;
561 bool ok = BytecodeUtils::get_NPE_message_at(&ss, method, bci);
562 if (ok) {
563 oop result = java_lang_String::create_oop_from_str(ss.base(), CHECK_NULL);
564 return (jstring) JNIHandles::make_local(THREAD, result);
565 } else {
566 return nullptr;
567 }
568 JVM_END
569
570 // java.lang.StackTraceElement //////////////////////////////////////////////
571
572
573 JVM_ENTRY_PROF(void, JVM_InitStackTraceElementArray, JVM_InitStackTraceElementArray(JNIEnv *env, jobjectArray elements, jobject backtrace, jint depth))
574 Handle backtraceh(THREAD, JNIHandles::resolve(backtrace));
575 objArrayOop st = objArrayOop(JNIHandles::resolve(elements));
576 objArrayHandle stack_trace(THREAD, st);
577 // Fill in the allocated stack trace
578 java_lang_Throwable::get_stack_trace_elements(depth, backtraceh, stack_trace, CHECK);
579 JVM_END
580
581
582 JVM_ENTRY_PROF(void, JVM_InitStackTraceElement, JVM_InitStackTraceElement(JNIEnv* env, jobject element, jobject stackFrameInfo))
583 Handle stack_frame_info(THREAD, JNIHandles::resolve_non_null(stackFrameInfo));
584 Handle stack_trace_element(THREAD, JNIHandles::resolve_non_null(element));
585 java_lang_StackFrameInfo::to_stack_trace_element(stack_frame_info, stack_trace_element, CHECK);
586 JVM_END
587
588
589 // java.lang.StackWalker //////////////////////////////////////////////////////
590 JVM_ENTRY_PROF(void, JVM_ExpandStackFrameInfo, JVM_ExpandStackFrameInfo(JNIEnv *env, jobject obj))
591 Handle stack_frame_info(THREAD, JNIHandles::resolve_non_null(obj));
592
593 bool have_name = (java_lang_StackFrameInfo::name(stack_frame_info()) != nullptr);
594 bool have_type = (java_lang_StackFrameInfo::type(stack_frame_info()) != nullptr);
595 Method* method = java_lang_StackFrameInfo::get_method(stack_frame_info());
596 if (!have_name) {
597 oop name = StringTable::intern(method->name(), CHECK);
598 java_lang_StackFrameInfo::set_name(stack_frame_info(), name);
599 }
600 if (!have_type) {
601 Handle type = java_lang_String::create_from_symbol(method->signature(), CHECK);
602 java_lang_StackFrameInfo::set_type(stack_frame_info(), type());
603 }
604 JVM_END
605
606 JVM_ENTRY_PROF(jobject, JVM_CallStackWalk, JVM_CallStackWalk(JNIEnv *env, jobject stackStream, jint mode,
607 jint skip_frames, jobject contScope, jobject cont,
608 jint buffer_size, jint start_index, jobjectArray frames))
609 if (!thread->has_last_Java_frame()) {
610 THROW_MSG_(vmSymbols::java_lang_InternalError(), "doStackWalk: no stack trace", nullptr);
611 }
612
613 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
614 Handle contScope_h(THREAD, JNIHandles::resolve(contScope));
615 Handle cont_h(THREAD, JNIHandles::resolve(cont));
616 // frames array is a ClassFrameInfo[] array when only getting caller reference,
617 // and a StackFrameInfo[] array (or derivative) otherwise. It should never
618 // be null.
619 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
620 objArrayHandle frames_array_h(THREAD, fa);
621
622 if (frames_array_h->length() < buffer_size) {
623 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers", nullptr);
624 }
625
626 oop result = StackWalk::walk(stackStream_h, mode, skip_frames, contScope_h, cont_h,
627 buffer_size, start_index, frames_array_h, CHECK_NULL);
628 return JNIHandles::make_local(THREAD, result);
629 JVM_END
630
631
632 JVM_ENTRY_PROF(jint, JVM_MoreStackWalk, JVM_MoreStackWalk(JNIEnv *env, jobject stackStream, jint mode, jlong anchor,
633 jint last_batch_count, jint buffer_size, jint start_index,
634 jobjectArray frames))
635 // frames array is a ClassFrameInfo[] array when only getting caller reference,
636 // and a StackFrameInfo[] array (or derivative) otherwise. It should never
637 // be null.
638 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
639 objArrayHandle frames_array_h(THREAD, fa);
640
641 if (frames_array_h->length() < buffer_size) {
642 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers");
643 }
644
645 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
646 return StackWalk::fetchNextBatch(stackStream_h, mode, anchor, last_batch_count, buffer_size,
647 start_index, frames_array_h, THREAD);
648 JVM_END
649
650 JVM_ENTRY_PROF(void, JVM_SetStackWalkContinuation, JVM_SetStackWalkContinuation(JNIEnv *env, jobject stackStream, jlong anchor, jobjectArray frames, jobject cont))
651 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
652 objArrayHandle frames_array_h(THREAD, fa);
653 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
654 Handle cont_h(THREAD, JNIHandles::resolve_non_null(cont));
655
656 StackWalk::setContinuation(stackStream_h, anchor, frames_array_h, cont_h, THREAD);
657 JVM_END
658
659 // java.lang.Object ///////////////////////////////////////////////
660
661
662 JVM_ENTRY_PROF(jint, JVM_IHashCode, JVM_IHashCode(JNIEnv* env, jobject handle))
663 // as implemented in the classic virtual machine; return 0 if object is null
664 return handle == nullptr ? 0 :
665 checked_cast<jint>(ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)));
666 JVM_END
667
668
669 JVM_ENTRY_PROF(void, JVM_MonitorWait, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
670 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
671 ObjectSynchronizer::wait(obj, ms, CHECK);
672 JVM_END
673
674
675 JVM_ENTRY_PROF(void, JVM_MonitorNotify, JVM_MonitorNotify(JNIEnv* env, jobject handle))
676 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
677 ObjectSynchronizer::notify(obj, CHECK);
678 JVM_END
679
680
681 JVM_ENTRY_PROF(void, JVM_MonitorNotifyAll, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
682 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
683 ObjectSynchronizer::notifyall(obj, CHECK);
684 JVM_END
685
686
687 JVM_ENTRY_PROF(jobject, JVM_Clone, JVM_Clone(JNIEnv* env, jobject handle))
688 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
689 Klass* klass = obj->klass();
690 JvmtiVMObjectAllocEventCollector oam;
691
692 #ifdef ASSERT
693 // Just checking that the cloneable flag is set correct
694 if (obj->is_array()) {
695 guarantee(klass->is_cloneable(), "all arrays are cloneable");
696 } else {
697 guarantee(obj->is_instance(), "should be instanceOop");
698 bool cloneable = klass->is_subtype_of(vmClasses::Cloneable_klass());
699 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
700 }
701 #endif
702
703 // Check if class of obj supports the Cloneable interface.
704 // All arrays are considered to be cloneable (See JLS 20.1.5).
705 // All j.l.r.Reference classes are considered non-cloneable.
706 if (!klass->is_cloneable() ||
707 (klass->is_instance_klass() &&
720 } else {
721 new_obj_oop = Universe::heap()->obj_allocate(klass, size, CHECK_NULL);
722 }
723
724 HeapAccess<>::clone(obj(), new_obj_oop, size);
725
726 Handle new_obj(THREAD, new_obj_oop);
727 // Caution: this involves a java upcall, so the clone should be
728 // "gc-robust" by this stage.
729 if (klass->has_finalizer()) {
730 assert(obj->is_instance(), "should be instanceOop");
731 new_obj_oop = InstanceKlass::register_finalizer(instanceOop(new_obj()), CHECK_NULL);
732 new_obj = Handle(THREAD, new_obj_oop);
733 }
734
735 return JNIHandles::make_local(THREAD, new_obj());
736 JVM_END
737
738 // java.lang.ref.Finalizer ////////////////////////////////////////////////////
739
740 JVM_ENTRY_PROF(void, JVM_ReportFinalizationComplete, JVM_ReportFinalizationComplete(JNIEnv * env, jobject finalizee))
741 MANAGEMENT_ONLY(FinalizerService::on_complete(JNIHandles::resolve_non_null(finalizee), THREAD);)
742 JVM_END
743
744 JVM_LEAF_PROF(jboolean, JVM_IsFinalizationEnabled, JVM_IsFinalizationEnabled(JNIEnv * env))
745 return InstanceKlass::is_finalization_enabled();
746 JVM_END
747
748 // jdk.internal.vm.Continuation /////////////////////////////////////////////////////
749
750 JVM_ENTRY_PROF(void, JVM_RegisterContinuationMethods, JVM_RegisterContinuationMethods(JNIEnv *env, jclass cls))
751 CONT_RegisterNativeMethods(env, cls);
752 JVM_END
753
754 // java.io.File ///////////////////////////////////////////////////////////////
755
756 JVM_LEAF_PROF(char*, JVM_NativePath, JVM_NativePath(char* path))
757 return os::native_path(path);
758 JVM_END
759
760
761 // Misc. class handling ///////////////////////////////////////////////////////////
762
763
764 JVM_ENTRY_PROF(jclass, JVM_GetCallerClass, JVM_GetCallerClass(JNIEnv* env))
765 // Getting the class of the caller frame.
766 //
767 // The call stack at this point looks something like this:
768 //
769 // [0] [ @CallerSensitive public jdk.internal.reflect.Reflection.getCallerClass ]
770 // [1] [ @CallerSensitive API.method ]
771 // [.] [ (skipped intermediate frames) ]
772 // [n] [ caller ]
773 vframeStream vfst(thread);
774 // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass
775 for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) {
776 Method* m = vfst.method();
777 assert(m != nullptr, "sanity");
778 switch (n) {
779 case 0:
780 // This must only be called from Reflection.getCallerClass
781 if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) {
782 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass");
783 }
784 // fall-through
785 case 1:
786 // Frame 0 and 1 must be caller sensitive.
787 if (!m->caller_sensitive()) {
788 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n));
789 }
790 break;
791 default:
792 if (!m->is_ignored_by_security_stack_walk()) {
793 // We have reached the desired frame; return the holder class.
794 return (jclass) JNIHandles::make_local(THREAD, m->method_holder()->java_mirror());
795 }
796 break;
797 }
798 }
799 return nullptr;
800 JVM_END
801
802
803 JVM_ENTRY_PROF(jclass, JVM_FindPrimitiveClass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
804 oop mirror = nullptr;
805 BasicType t = name2type(utf);
806 if (t != T_ILLEGAL && !is_reference_type(t)) {
807 mirror = Universe::java_mirror(t);
808 }
809 if (mirror == nullptr) {
810 THROW_MSG_NULL(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
811 } else {
812 return (jclass) JNIHandles::make_local(THREAD, mirror);
813 }
814 JVM_END
815
816
817 // Returns a class loaded by the bootstrap class loader; or null
818 // if not found. ClassNotFoundException is not thrown.
819 // FindClassFromBootLoader is exported to the launcher for windows.
820 JVM_ENTRY_PROF(jclass, JVM_FindClassFromBootLoader, JVM_FindClassFromBootLoader(JNIEnv* env, const char* name))
821 // Java libraries should ensure that name is never null or illegal.
822 if (name == nullptr || (int)strlen(name) > Symbol::max_length()) {
823 // It's impossible to create this class; the name cannot fit
824 // into the constant pool.
825 return nullptr;
826 }
827 assert(UTF8::is_legal_utf8((const unsigned char*)name, strlen(name), false), "illegal UTF name");
828
829 TempNewSymbol h_name = SymbolTable::new_symbol(name);
830 Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
831 if (k == nullptr) {
832 return nullptr;
833 }
834
835 if (log_is_enabled(Debug, class, resolve)) {
836 trace_class_resolution(k);
837 }
838 return (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
839 JVM_END
840
841 // Find a class with this name in this loader, using the caller's protection domain.
842 JVM_ENTRY_PROF(jclass, JVM_FindClassFromCaller, JVM_FindClassFromCaller(JNIEnv* env, const char* name,
843 jboolean init, jobject loader,
844 jclass caller))
845 TempNewSymbol h_name =
846 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_ClassNotFoundException(),
847 CHECK_NULL);
848
849 oop loader_oop = JNIHandles::resolve(loader);
850 oop from_class = JNIHandles::resolve(caller);
851 Handle h_loader(THREAD, loader_oop);
852
853 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
854 false, THREAD);
855
856 if (log_is_enabled(Debug, class, resolve) && result != nullptr) {
857 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
858 }
859 return result;
860 JVM_END
861
862 // Currently only called from the old verifier.
863 JVM_ENTRY_PROF(jclass, JVM_FindClassFromClass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
864 jboolean init, jclass from))
865 TempNewSymbol h_name =
866 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_ClassNotFoundException(),
867 CHECK_NULL);
868 oop from_class_oop = JNIHandles::resolve(from);
869 Klass* from_class = (from_class_oop == nullptr)
870 ? (Klass*)nullptr
871 : java_lang_Class::as_Klass(from_class_oop);
872 oop class_loader = nullptr;
873 if (from_class != nullptr) {
874 class_loader = from_class->class_loader();
875 }
876 Handle h_loader(THREAD, class_loader);
877 jclass result = find_class_from_class_loader(env, h_name, init, h_loader, true, thread);
878
879 if (log_is_enabled(Debug, class, resolve) && result != nullptr) {
880 // this function is generally only used for class loading during verification.
881 ResourceMark rm;
882 oop from_mirror = JNIHandles::resolve_non_null(from);
883 Klass* from_class = java_lang_Class::as_Klass(from_mirror);
884 const char * from_name = from_class->external_name();
1043 ik->external_name(),
1044 host_class->external_name(),
1045 ik->is_hidden() ? "is hidden" : "is not hidden");
1046 }
1047 }
1048
1049 if ((!is_hidden || is_nestmate) && !Reflection::is_same_class_package(lookup_k, ik)) {
1050 // non-hidden class or nestmate class must be in the same package as the Lookup class
1051 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Lookup class and defined class are in different packages");
1052 }
1053
1054 if (init) {
1055 ik->initialize(CHECK_NULL);
1056 } else {
1057 ik->link_class(CHECK_NULL);
1058 }
1059
1060 return (jclass) JNIHandles::make_local(THREAD, ik->java_mirror());
1061 }
1062
1063 JVM_ENTRY_PROF(jclass, JVM_DefineClass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
1064 return jvm_define_class_common(name, loader, buf, len, pd, nullptr, THREAD);
1065 JVM_END
1066
1067 /*
1068 * Define a class with the specified lookup class.
1069 * lookup: Lookup class
1070 * name: the name of the class
1071 * buf: class bytes
1072 * len: length of class bytes
1073 * pd: protection domain
1074 * init: initialize the class
1075 * flags: properties of the class
1076 * classData: private static pre-initialized field
1077 */
1078 JVM_ENTRY_PROF(jclass, JVM_LookupDefineClass, JVM_LookupDefineClass(JNIEnv *env, jclass lookup, const char *name, const jbyte *buf,
1079 jsize len, jobject pd, jboolean initialize, int flags, jobject classData))
1080
1081 if (lookup == nullptr) {
1082 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Lookup class is null");
1083 }
1084
1085 assert(buf != nullptr, "buf must not be null");
1086
1087 return jvm_lookup_define_class(lookup, name, buf, len, pd, initialize, flags, classData, THREAD);
1088 JVM_END
1089
1090 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))
1091 return jvm_define_class_common(name, loader, buf, len, pd, source, THREAD);
1092 JVM_END
1093
1094 JVM_ENTRY_PROF(jclass, JVM_FindLoadedClass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
1095 ResourceMark rm(THREAD);
1096
1097 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
1098 char* str = java_lang_String::as_utf8_string(h_name());
1099
1100 // Sanity check, don't expect null
1101 if (str == nullptr) return nullptr;
1102
1103 // Internalize the string, converting '.' to '/' in string.
1104 char* p = (char*)str;
1105 while (*p != '\0') {
1106 if (*p == '.') {
1107 *p = '/';
1108 }
1109 p++;
1110 }
1111
1112 const int str_len = (int)(p - str);
1113 if (str_len > Symbol::max_length()) {
1114 // It's impossible to create this class; the name cannot fit
1118 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len);
1119
1120 // Security Note:
1121 // The Java level wrapper will perform the necessary security check allowing
1122 // us to pass the null as the initiating class loader.
1123 Handle h_loader(THREAD, JNIHandles::resolve(loader));
1124 Klass* k = SystemDictionary::find_instance_or_array_klass(THREAD, klass_name, h_loader);
1125 #if INCLUDE_CDS
1126 if (k == nullptr) {
1127 // If the class is not already loaded, try to see if it's in the shared
1128 // archive for the current classloader (h_loader).
1129 k = SystemDictionaryShared::find_or_load_shared_class(klass_name, h_loader, CHECK_NULL);
1130 }
1131 #endif
1132 return (k == nullptr) ? nullptr :
1133 (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
1134 JVM_END
1135
1136 // Module support //////////////////////////////////////////////////////////////////////////////
1137
1138 JVM_ENTRY_PROF(void, JVM_DefineModule, JVM_DefineModule(JNIEnv *env, jobject module, jboolean is_open, jstring version,
1139 jstring location, jobjectArray packages))
1140 Handle h_module (THREAD, JNIHandles::resolve(module));
1141 Modules::define_module(h_module, is_open, version, location, packages, CHECK);
1142 JVM_END
1143
1144 JVM_ENTRY_PROF(void, JVM_SetBootLoaderUnnamedModule, JVM_SetBootLoaderUnnamedModule(JNIEnv *env, jobject module))
1145 Handle h_module (THREAD, JNIHandles::resolve(module));
1146 Modules::set_bootloader_unnamed_module(h_module, CHECK);
1147 JVM_END
1148
1149 JVM_ENTRY_PROF(void, JVM_AddModuleExports, JVM_AddModuleExports(JNIEnv *env, jobject from_module, jstring package, jobject to_module))
1150 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1151 Handle h_to_module (THREAD, JNIHandles::resolve(to_module));
1152 Modules::add_module_exports_qualified(h_from_module, package, h_to_module, CHECK);
1153 JVM_END
1154
1155 JVM_ENTRY_PROF(void, JVM_AddModuleExportsToAllUnnamed, JVM_AddModuleExportsToAllUnnamed(JNIEnv *env, jobject from_module, jstring package))
1156 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1157 Modules::add_module_exports_to_all_unnamed(h_from_module, package, CHECK);
1158 JVM_END
1159
1160 JVM_ENTRY_PROF(void, JVM_AddModuleExportsToAll, JVM_AddModuleExportsToAll(JNIEnv *env, jobject from_module, jstring package))
1161 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1162 Modules::add_module_exports(h_from_module, package, Handle(), CHECK);
1163 JVM_END
1164
1165 JVM_ENTRY_PROF(void, JVM_AddReadsModule, JVM_AddReadsModule(JNIEnv *env, jobject from_module, jobject source_module))
1166 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1167 Handle h_source_module (THREAD, JNIHandles::resolve(source_module));
1168 Modules::add_reads_module(h_from_module, h_source_module, CHECK);
1169 JVM_END
1170
1171 JVM_ENTRY_PROF(void, JVM_DefineArchivedModules, JVM_DefineArchivedModules(JNIEnv *env, jobject platform_loader, jobject system_loader))
1172 Handle h_platform_loader (THREAD, JNIHandles::resolve(platform_loader));
1173 Handle h_system_loader (THREAD, JNIHandles::resolve(system_loader));
1174 Modules::define_archived_modules(h_platform_loader, h_system_loader, CHECK);
1175 JVM_END
1176
1177 // Reflection support //////////////////////////////////////////////////////////////////////////////
1178
1179 JVM_ENTRY_PROF(jstring, JVM_InitClassName, JVM_InitClassName(JNIEnv *env, jclass cls))
1180 assert (cls != nullptr, "illegal class");
1181 JvmtiVMObjectAllocEventCollector oam;
1182 ResourceMark rm(THREAD);
1183 HandleMark hm(THREAD);
1184 Handle java_class(THREAD, JNIHandles::resolve(cls));
1185 oop result = java_lang_Class::name(java_class, CHECK_NULL);
1186 return (jstring) JNIHandles::make_local(THREAD, result);
1187 JVM_END
1188
1189
1190 JVM_ENTRY_PROF(jobjectArray, JVM_GetClassInterfaces, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
1191 JvmtiVMObjectAllocEventCollector oam;
1192 oop mirror = JNIHandles::resolve_non_null(cls);
1193
1194 // Special handling for primitive objects
1195 if (java_lang_Class::is_primitive(mirror)) {
1196 // Primitive objects does not have any interfaces
1197 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(), 0, CHECK_NULL);
1198 return (jobjectArray) JNIHandles::make_local(THREAD, r);
1199 }
1200
1201 Klass* klass = java_lang_Class::as_Klass(mirror);
1202 // Figure size of result array
1203 int size;
1204 if (klass->is_instance_klass()) {
1205 size = InstanceKlass::cast(klass)->local_interfaces()->length();
1206 } else {
1207 assert(klass->is_objArray_klass() || klass->is_typeArray_klass(), "Illegal mirror klass");
1208 size = 2;
1209 }
1210
1211 // Allocate result array
1212 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(), size, CHECK_NULL);
1213 objArrayHandle result (THREAD, r);
1214 // Fill in result
1215 if (klass->is_instance_klass()) {
1216 // Regular instance klass, fill in all local interfaces
1217 for (int index = 0; index < size; index++) {
1218 InstanceKlass* k = InstanceKlass::cast(klass)->local_interfaces()->at(index);
1219 result->obj_at_put(index, k->java_mirror());
1220 }
1221 } else {
1222 // All arrays implement java.lang.Cloneable and java.io.Serializable
1223 result->obj_at_put(0, vmClasses::Cloneable_klass()->java_mirror());
1224 result->obj_at_put(1, vmClasses::Serializable_klass()->java_mirror());
1225 }
1226 return (jobjectArray) JNIHandles::make_local(THREAD, result());
1227 JVM_END
1228
1229
1230 JVM_ENTRY_PROF(jboolean, JVM_IsHiddenClass, JVM_IsHiddenClass(JNIEnv *env, jclass cls))
1231 oop mirror = JNIHandles::resolve_non_null(cls);
1232 if (java_lang_Class::is_primitive(mirror)) {
1233 return JNI_FALSE;
1234 }
1235 Klass* k = java_lang_Class::as_Klass(mirror);
1236 return k->is_hidden();
1237 JVM_END
1238
1239 class ScopedValueBindingsResolver {
1240 public:
1241 InstanceKlass* Carrier_klass;
1242 ScopedValueBindingsResolver(JavaThread* THREAD) {
1243 Klass *k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_ScopedValue_Carrier(), true, THREAD);
1244 Carrier_klass = InstanceKlass::cast(k);
1245 }
1246 };
1247
1248 JVM_ENTRY_PROF(jobject, JVM_FindScopedValueBindings, JVM_FindScopedValueBindings(JNIEnv *env, jclass cls))
1249 ResourceMark rm(THREAD);
1250 GrowableArray<Handle>* local_array = new GrowableArray<Handle>(12);
1251 JvmtiVMObjectAllocEventCollector oam;
1252
1253 static ScopedValueBindingsResolver resolver(THREAD);
1254
1255 // Iterate through Java frames
1256 vframeStream vfst(thread);
1257 for(; !vfst.at_end(); vfst.next()) {
1258 int loc = -1;
1259 // get method of frame
1260 Method* method = vfst.method();
1261
1262 Symbol *name = method->name();
1263
1264 InstanceKlass* holder = method->method_holder();
1265 if (name == vmSymbols::runWith_method_name()) {
1266 if (holder == vmClasses::Thread_klass()
1267 || holder == resolver.Carrier_klass) {
1268 loc = 1;
1269 }
1270 }
1271
1272 if (loc != -1) {
1273 javaVFrame *frame = vfst.asJavaVFrame();
1274 StackValueCollection* locals = frame->locals();
1275 StackValue* head_sv = locals->at(loc); // java/lang/ScopedValue$Snapshot
1276 Handle result = head_sv->get_obj();
1277 assert(!head_sv->obj_is_scalar_replaced(), "found scalar-replaced object");
1278 if (result() != nullptr) {
1279 return JNIHandles::make_local(THREAD, result());
1280 }
1281 }
1282 }
1283
1284 return nullptr;
1285 JVM_END
1286
1287
1288 JVM_ENTRY_PROF(jobjectArray, JVM_GetDeclaredClasses, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1289 JvmtiVMObjectAllocEventCollector oam;
1290 // ofClass is a reference to a java_lang_Class object. The mirror object
1291 // of an InstanceKlass
1292 oop ofMirror = JNIHandles::resolve_non_null(ofClass);
1293 if (java_lang_Class::is_primitive(ofMirror) ||
1294 ! java_lang_Class::as_Klass(ofMirror)->is_instance_klass()) {
1295 oop result = oopFactory::new_objArray(vmClasses::Class_klass(), 0, CHECK_NULL);
1296 return (jobjectArray)JNIHandles::make_local(THREAD, result);
1297 }
1298
1299 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(ofMirror));
1300 InnerClassesIterator iter(k);
1301
1302 if (iter.length() == 0) {
1303 // Neither an inner nor outer class
1304 oop result = oopFactory::new_objArray(vmClasses::Class_klass(), 0, CHECK_NULL);
1305 return (jobjectArray)JNIHandles::make_local(THREAD, result);
1306 }
1307
1308 // find inner class info
1334 result->obj_at_put(members, inner_klass->java_mirror());
1335 members++;
1336 }
1337 }
1338 }
1339 }
1340
1341 if (members != length) {
1342 // Return array of right length
1343 objArrayOop res = oopFactory::new_objArray(vmClasses::Class_klass(), members, CHECK_NULL);
1344 for(int i = 0; i < members; i++) {
1345 res->obj_at_put(i, result->obj_at(i));
1346 }
1347 return (jobjectArray)JNIHandles::make_local(THREAD, res);
1348 }
1349
1350 return (jobjectArray)JNIHandles::make_local(THREAD, result());
1351 JVM_END
1352
1353
1354 JVM_ENTRY_PROF(jclass, JVM_GetDeclaringClass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1355 {
1356 // ofClass is a reference to a java_lang_Class object.
1357 oop ofMirror = JNIHandles::resolve_non_null(ofClass);
1358 if (java_lang_Class::is_primitive(ofMirror)) {
1359 return nullptr;
1360 }
1361 Klass* klass = java_lang_Class::as_Klass(ofMirror);
1362 if (!klass->is_instance_klass()) {
1363 return nullptr;
1364 }
1365
1366 bool inner_is_member = false;
1367 Klass* outer_klass
1368 = InstanceKlass::cast(klass)->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1369 if (outer_klass == nullptr) return nullptr; // already a top-level class
1370 if (!inner_is_member) return nullptr; // a hidden class (inside a method)
1371 return (jclass) JNIHandles::make_local(THREAD, outer_klass->java_mirror());
1372 }
1373 JVM_END
1374
1375 JVM_ENTRY_PROF(jstring, JVM_GetSimpleBinaryName, JVM_GetSimpleBinaryName(JNIEnv *env, jclass cls))
1376 {
1377 oop mirror = JNIHandles::resolve_non_null(cls);
1378 if (java_lang_Class::is_primitive(mirror)) {
1379 return nullptr;
1380 }
1381 Klass* klass = java_lang_Class::as_Klass(mirror);
1382 if (!klass->is_instance_klass()) {
1383 return nullptr;
1384 }
1385 InstanceKlass* k = InstanceKlass::cast(klass);
1386 int ooff = 0, noff = 0;
1387 if (k->find_inner_classes_attr(&ooff, &noff, THREAD)) {
1388 if (noff != 0) {
1389 constantPoolHandle i_cp(thread, k->constants());
1390 Symbol* name = i_cp->symbol_at(noff);
1391 Handle str = java_lang_String::create_from_symbol(name, CHECK_NULL);
1392 return (jstring) JNIHandles::make_local(THREAD, str());
1393 }
1394 }
1395 return nullptr;
1396 }
1397 JVM_END
1398
1399 JVM_ENTRY_PROF(jstring, JVM_GetClassSignature, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1400 assert (cls != nullptr, "illegal class");
1401 JvmtiVMObjectAllocEventCollector oam;
1402 ResourceMark rm(THREAD);
1403 oop mirror = JNIHandles::resolve_non_null(cls);
1404 // Return null for arrays and primitives
1405 if (!java_lang_Class::is_primitive(mirror)) {
1406 Klass* k = java_lang_Class::as_Klass(mirror);
1407 if (k->is_instance_klass()) {
1408 Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1409 if (sym == nullptr) return nullptr;
1410 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1411 return (jstring) JNIHandles::make_local(THREAD, str());
1412 }
1413 }
1414 return nullptr;
1415 JVM_END
1416
1417
1418 JVM_ENTRY_PROF(jbyteArray, JVM_GetClassAnnotations, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1419 assert (cls != nullptr, "illegal class");
1420 oop mirror = JNIHandles::resolve_non_null(cls);
1421 // Return null for arrays and primitives
1422 if (!java_lang_Class::is_primitive(mirror)) {
1423 Klass* k = java_lang_Class::as_Klass(mirror);
1424 if (k->is_instance_klass()) {
1425 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1426 return (jbyteArray) JNIHandles::make_local(THREAD, a);
1427 }
1428 }
1429 return nullptr;
1430 JVM_END
1431
1432
1433 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd) {
1434 // some of this code was adapted from from jni_FromReflectedField
1435
1436 oop reflected = JNIHandles::resolve_non_null(field);
1437 oop mirror = java_lang_reflect_Field::clazz(reflected);
1438 Klass* k = java_lang_Class::as_Klass(mirror);
1467 int slot = 0;
1468
1469 if (reflected->klass() == vmClasses::reflect_Constructor_klass()) {
1470 mirror = java_lang_reflect_Constructor::clazz(reflected);
1471 slot = java_lang_reflect_Constructor::slot(reflected);
1472 } else {
1473 assert(reflected->klass() == vmClasses::reflect_Method_klass(),
1474 "wrong type");
1475 mirror = java_lang_reflect_Method::clazz(reflected);
1476 slot = java_lang_reflect_Method::slot(reflected);
1477 }
1478 Klass* k = java_lang_Class::as_Klass(mirror);
1479
1480 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1481 assert(m != nullptr, "cannot find method");
1482 return m; // caller has to deal with null in product mode
1483 }
1484
1485 /* Type use annotations support (JDK 1.8) */
1486
1487 JVM_ENTRY_PROF(jbyteArray, JVM_GetClassTypeAnnotations, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1488 assert (cls != nullptr, "illegal class");
1489 ResourceMark rm(THREAD);
1490 // Return null for arrays and primitives
1491 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1492 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1493 if (k->is_instance_klass()) {
1494 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1495 if (type_annotations != nullptr) {
1496 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1497 return (jbyteArray) JNIHandles::make_local(THREAD, a);
1498 }
1499 }
1500 }
1501 return nullptr;
1502 JVM_END
1503
1504 JVM_ENTRY_PROF(jbyteArray, JVM_GetMethodTypeAnnotations, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1505 assert (method != nullptr, "illegal method");
1506 // method is a handle to a java.lang.reflect.Method object
1507 Method* m = jvm_get_method_common(method);
1508 if (m == nullptr) {
1509 return nullptr;
1510 }
1511
1512 AnnotationArray* type_annotations = m->type_annotations();
1513 if (type_annotations != nullptr) {
1514 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1515 return (jbyteArray) JNIHandles::make_local(THREAD, a);
1516 }
1517
1518 return nullptr;
1519 JVM_END
1520
1521 JVM_ENTRY_PROF(jbyteArray, JVM_GetFieldTypeAnnotations, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1522 assert (field != nullptr, "illegal field");
1523 fieldDescriptor fd;
1524 bool gotFd = jvm_get_field_common(field, fd);
1525 if (!gotFd) {
1526 return nullptr;
1527 }
1528
1529 return (jbyteArray) JNIHandles::make_local(THREAD, Annotations::make_java_array(fd.type_annotations(), THREAD));
1530 JVM_END
1531
1532 static void bounds_check(const constantPoolHandle& cp, jint index, TRAPS) {
1533 if (!cp->is_within_bounds(index)) {
1534 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1535 }
1536 }
1537
1538 JVM_ENTRY_PROF(jobjectArray, JVM_GetMethodParameters, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1539 {
1540 // method is a handle to a java.lang.reflect.Method object
1541 Method* method_ptr = jvm_get_method_common(method);
1542 methodHandle mh (THREAD, method_ptr);
1543 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1544 const int num_params = mh->method_parameters_length();
1545
1546 if (num_params < 0) {
1547 // A -1 return value from method_parameters_length means there is no
1548 // parameter data. Return null to indicate this to the reflection
1549 // API.
1550 assert(num_params == -1, "num_params should be -1 if it is less than zero");
1551 return (jobjectArray)nullptr;
1552 } else {
1553 // Otherwise, we return something up to reflection, even if it is
1554 // a zero-length array. Why? Because in some cases this can
1555 // trigger a MalformedParametersException.
1556
1557 // make sure all the symbols are properly formatted
1558 for (int i = 0; i < num_params; i++) {
1571 objArrayOop result_oop = oopFactory::new_objArray(vmClasses::reflect_Parameter_klass(), num_params, CHECK_NULL);
1572 objArrayHandle result (THREAD, result_oop);
1573
1574 for (int i = 0; i < num_params; i++) {
1575 MethodParametersElement* params = mh->method_parameters_start();
1576 // For a 0 index, give a null symbol
1577 Symbol* sym = 0 != params[i].name_cp_index ?
1578 mh->constants()->symbol_at(params[i].name_cp_index) : nullptr;
1579 int flags = params[i].flags;
1580 oop param = Reflection::new_parameter(reflected_method, i, sym,
1581 flags, CHECK_NULL);
1582 result->obj_at_put(i, param);
1583 }
1584 return (jobjectArray)JNIHandles::make_local(THREAD, result());
1585 }
1586 }
1587 JVM_END
1588
1589 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1590
1591 JVM_ENTRY_PROF(jobjectArray, JVM_GetClassDeclaredFields, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1592 {
1593 JvmtiVMObjectAllocEventCollector oam;
1594
1595 oop ofMirror = JNIHandles::resolve_non_null(ofClass);
1596 // Exclude primitive types and array types
1597 if (java_lang_Class::is_primitive(ofMirror) ||
1598 java_lang_Class::as_Klass(ofMirror)->is_array_klass()) {
1599 // Return empty array
1600 oop res = oopFactory::new_objArray(vmClasses::reflect_Field_klass(), 0, CHECK_NULL);
1601 return (jobjectArray) JNIHandles::make_local(THREAD, res);
1602 }
1603
1604 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(ofMirror));
1605 constantPoolHandle cp(THREAD, k->constants());
1606
1607 // Ensure class is linked
1608 k->link_class(CHECK_NULL);
1609
1610 // Allocate result
1611 int num_fields;
1622 objArrayOop r = oopFactory::new_objArray(vmClasses::reflect_Field_klass(), num_fields, CHECK_NULL);
1623 objArrayHandle result (THREAD, r);
1624
1625 int out_idx = 0;
1626 fieldDescriptor fd;
1627 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1628 if (!publicOnly || fs.access_flags().is_public()) {
1629 fd.reinitialize(k, fs.to_FieldInfo());
1630 oop field = Reflection::new_field(&fd, CHECK_NULL);
1631 result->obj_at_put(out_idx, field);
1632 ++out_idx;
1633 }
1634 }
1635 assert(out_idx == num_fields, "just checking");
1636 return (jobjectArray) JNIHandles::make_local(THREAD, result());
1637 }
1638 JVM_END
1639
1640 // A class is a record if and only if it is final and a direct subclass of
1641 // java.lang.Record and has a Record attribute; otherwise, it is not a record.
1642 JVM_ENTRY_PROF(jboolean, JVM_IsRecord, JVM_IsRecord(JNIEnv *env, jclass cls))
1643 {
1644 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1645 if (k != nullptr && k->is_instance_klass()) {
1646 InstanceKlass* ik = InstanceKlass::cast(k);
1647 return ik->is_record();
1648 } else {
1649 return false;
1650 }
1651 }
1652 JVM_END
1653
1654 // Returns an array containing the components of the Record attribute,
1655 // or null if the attribute is not present.
1656 //
1657 // Note that this function returns the components of the Record attribute
1658 // even if the class is not a record.
1659 JVM_ENTRY_PROF(jobjectArray, JVM_GetRecordComponents, JVM_GetRecordComponents(JNIEnv* env, jclass ofClass))
1660 {
1661 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass));
1662 assert(c->is_instance_klass(), "must be");
1663 InstanceKlass* ik = InstanceKlass::cast(c);
1664
1665 Array<RecordComponent*>* components = ik->record_components();
1666 if (components != nullptr) {
1667 JvmtiVMObjectAllocEventCollector oam;
1668 constantPoolHandle cp(THREAD, ik->constants());
1669 int length = components->length();
1670 assert(length >= 0, "unexpected record_components length");
1671 objArrayOop record_components =
1672 oopFactory::new_objArray(vmClasses::RecordComponent_klass(), length, CHECK_NULL);
1673 objArrayHandle components_h (THREAD, record_components);
1674
1675 for (int x = 0; x < length; x++) {
1676 RecordComponent* component = components->at(x);
1677 assert(component != nullptr, "unexpected null record component");
1678 oop component_oop = java_lang_reflect_RecordComponent::create(ik, component, CHECK_NULL);
1679 components_h->obj_at_put(x, component_oop);
1746 for (int i = 0; i < num_methods; i++) {
1747 methodHandle method(THREAD, k->method_with_idnum(idnums->at(i)));
1748 if (method.is_null()) {
1749 // Method may have been deleted and seems this API can handle null
1750 // Otherwise should probably put a method that throws NSME
1751 result->obj_at_put(i, nullptr);
1752 } else {
1753 oop m;
1754 if (want_constructor) {
1755 m = Reflection::new_constructor(method, CHECK_NULL);
1756 } else {
1757 m = Reflection::new_method(method, false, CHECK_NULL);
1758 }
1759 result->obj_at_put(i, m);
1760 }
1761 }
1762
1763 return (jobjectArray) JNIHandles::make_local(THREAD, result());
1764 }
1765
1766 JVM_ENTRY_PROF(jobjectArray, JVM_GetClassDeclaredMethods, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1767 {
1768 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1769 /*want_constructor*/ false,
1770 vmClasses::reflect_Method_klass(), THREAD);
1771 }
1772 JVM_END
1773
1774 JVM_ENTRY_PROF(jobjectArray, JVM_GetClassDeclaredConstructors, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1775 {
1776 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1777 /*want_constructor*/ true,
1778 vmClasses::reflect_Constructor_klass(), THREAD);
1779 }
1780 JVM_END
1781
1782 JVM_ENTRY_PROF(jboolean, JVM_AreNestMates, JVM_AreNestMates(JNIEnv *env, jclass current, jclass member))
1783 {
1784 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1785 assert(c->is_instance_klass(), "must be");
1786 InstanceKlass* ck = InstanceKlass::cast(c);
1787 Klass* m = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(member));
1788 assert(m->is_instance_klass(), "must be");
1789 InstanceKlass* mk = InstanceKlass::cast(m);
1790 return ck->has_nestmate_access_to(mk, THREAD);
1791 }
1792 JVM_END
1793
1794 JVM_ENTRY_PROF(jclass, JVM_GetNestHost, JVM_GetNestHost(JNIEnv* env, jclass current))
1795 {
1796 // current is not a primitive or array class
1797 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1798 assert(c->is_instance_klass(), "must be");
1799 InstanceKlass* ck = InstanceKlass::cast(c);
1800 InstanceKlass* host = ck->nest_host(THREAD);
1801 return (jclass) (host == nullptr ? nullptr :
1802 JNIHandles::make_local(THREAD, host->java_mirror()));
1803 }
1804 JVM_END
1805
1806 JVM_ENTRY_PROF(jobjectArray, JVM_GetNestMembers, JVM_GetNestMembers(JNIEnv* env, jclass current))
1807 {
1808 // current is not a primitive or array class
1809 ResourceMark rm(THREAD);
1810 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1811 assert(c->is_instance_klass(), "must be");
1812 InstanceKlass* ck = InstanceKlass::cast(c);
1813 InstanceKlass* host = ck->nest_host(THREAD);
1814
1815 log_trace(class, nestmates)("Calling GetNestMembers for type %s with nest-host %s",
1816 ck->external_name(), host->external_name());
1817 {
1818 JvmtiVMObjectAllocEventCollector oam;
1819 Array<u2>* members = host->nest_members();
1820 int length = members == nullptr ? 0 : members->length();
1821
1822 log_trace(class, nestmates)(" - host has %d listed nest members", length);
1823
1824 // nest host is first in the array so make it one bigger
1825 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(),
1826 length + 1, CHECK_NULL);
1866 log_trace(class, nestmates)(" - compacting array from length %d to %d",
1867 length + 1, count + 1);
1868
1869 objArrayOop r2 = oopFactory::new_objArray(vmClasses::Class_klass(),
1870 count + 1, CHECK_NULL);
1871 objArrayHandle result2(THREAD, r2);
1872 for (int i = 0; i < count + 1; i++) {
1873 result2->obj_at_put(i, result->obj_at(i));
1874 }
1875 return (jobjectArray)JNIHandles::make_local(THREAD, result2());
1876 }
1877 }
1878 else {
1879 assert(host == ck || ck->is_hidden(), "must be singleton nest or dynamic nestmate");
1880 }
1881 return (jobjectArray)JNIHandles::make_local(THREAD, result());
1882 }
1883 }
1884 JVM_END
1885
1886 JVM_ENTRY_PROF(jobjectArray, JVM_GetPermittedSubclasses, JVM_GetPermittedSubclasses(JNIEnv* env, jclass current))
1887 {
1888 oop mirror = JNIHandles::resolve_non_null(current);
1889 assert(!java_lang_Class::is_primitive(mirror), "should not be");
1890 Klass* c = java_lang_Class::as_Klass(mirror);
1891 assert(c->is_instance_klass(), "must be");
1892 InstanceKlass* ik = InstanceKlass::cast(c);
1893 ResourceMark rm(THREAD);
1894 log_trace(class, sealed)("Calling GetPermittedSubclasses for %s type %s",
1895 ik->is_sealed() ? "sealed" : "non-sealed", ik->external_name());
1896 if (ik->is_sealed()) {
1897 JvmtiVMObjectAllocEventCollector oam;
1898 Array<u2>* subclasses = ik->permitted_subclasses();
1899 int length = subclasses->length();
1900
1901 log_trace(class, sealed)(" - sealed class has %d permitted subclasses", length);
1902
1903 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(),
1904 length, CHECK_NULL);
1905 objArrayHandle result(THREAD, r);
1906 int count = 0;
1929 }
1930 if (count < length) {
1931 // we had invalid entries so we need to compact the array
1932 objArrayOop r2 = oopFactory::new_objArray(vmClasses::Class_klass(),
1933 count, CHECK_NULL);
1934 objArrayHandle result2(THREAD, r2);
1935 for (int i = 0; i < count; i++) {
1936 result2->obj_at_put(i, result->obj_at(i));
1937 }
1938 return (jobjectArray)JNIHandles::make_local(THREAD, result2());
1939 }
1940 return (jobjectArray)JNIHandles::make_local(THREAD, result());
1941 } else {
1942 return nullptr;
1943 }
1944 }
1945 JVM_END
1946
1947 // Constant pool access //////////////////////////////////////////////////////////
1948
1949 JVM_ENTRY_PROF(jobject, JVM_GetClassConstantPool, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1950 {
1951 JvmtiVMObjectAllocEventCollector oam;
1952 oop mirror = JNIHandles::resolve_non_null(cls);
1953 // Return null for primitives and arrays
1954 if (!java_lang_Class::is_primitive(mirror)) {
1955 Klass* k = java_lang_Class::as_Klass(mirror);
1956 if (k->is_instance_klass()) {
1957 InstanceKlass* k_h = InstanceKlass::cast(k);
1958 Handle jcp = reflect_ConstantPool::create(CHECK_NULL);
1959 reflect_ConstantPool::set_cp(jcp(), k_h->constants());
1960 return JNIHandles::make_local(THREAD, jcp());
1961 }
1962 }
1963 return nullptr;
1964 }
1965 JVM_END
1966
1967
1968 JVM_ENTRY_PROF(jint, JVM_ConstantPoolGetSize, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj))
1969 {
1970 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1971 return cp->length();
1972 }
1973 JVM_END
1974
1975
1976 JVM_ENTRY_PROF(jclass, JVM_ConstantPoolGetClassAt, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jint index))
1977 {
1978 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1979 bounds_check(cp, index, CHECK_NULL);
1980 constantTag tag = cp->tag_at(index);
1981 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1982 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1983 }
1984 Klass* k = cp->klass_at(index, CHECK_NULL);
1985 return (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
1986 }
1987 JVM_END
1988
1989 JVM_ENTRY_PROF(jclass, JVM_ConstantPoolGetClassAtIfLoaded, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jint index))
1990 {
1991 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1992 bounds_check(cp, index, CHECK_NULL);
1993 constantTag tag = cp->tag_at(index);
1994 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1995 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1996 }
1997 Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
1998 if (k == nullptr) return nullptr;
1999 return (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
2000 }
2001 JVM_END
2002
2003 static jobject get_method_at_helper(const constantPoolHandle& cp, jint index, bool force_resolution, TRAPS) {
2004 constantTag tag = cp->tag_at(index);
2005 if (!tag.is_method() && !tag.is_interface_method()) {
2006 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2007 }
2008 int klass_ref = cp->uncached_klass_ref_index_at(index);
2009 Klass* k_o;
2013 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2014 if (k_o == nullptr) return nullptr;
2015 }
2016 InstanceKlass* k = InstanceKlass::cast(k_o);
2017 Symbol* name = cp->uncached_name_ref_at(index);
2018 Symbol* sig = cp->uncached_signature_ref_at(index);
2019 methodHandle m (THREAD, k->find_method(name, sig));
2020 if (m.is_null()) {
2021 THROW_MSG_NULL(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
2022 }
2023 oop method;
2024 if (m->is_object_initializer()) {
2025 method = Reflection::new_constructor(m, CHECK_NULL);
2026 } else {
2027 // new_method accepts <clinit> as Method here
2028 method = Reflection::new_method(m, true, CHECK_NULL);
2029 }
2030 return JNIHandles::make_local(THREAD, method);
2031 }
2032
2033 JVM_ENTRY_PROF(jobject, JVM_ConstantPoolGetMethodAt, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jint index))
2034 {
2035 JvmtiVMObjectAllocEventCollector oam;
2036 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2037 bounds_check(cp, index, CHECK_NULL);
2038 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
2039 return res;
2040 }
2041 JVM_END
2042
2043 JVM_ENTRY_PROF(jobject, JVM_ConstantPoolGetMethodAtIfLoaded, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jint index))
2044 {
2045 JvmtiVMObjectAllocEventCollector oam;
2046 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2047 bounds_check(cp, index, CHECK_NULL);
2048 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
2049 return res;
2050 }
2051 JVM_END
2052
2053 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2054 constantTag tag = cp->tag_at(index);
2055 if (!tag.is_field()) {
2056 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2057 }
2058 int klass_ref = cp->uncached_klass_ref_index_at(index);
2059 Klass* k_o;
2060 if (force_resolution) {
2061 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2062 } else {
2063 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2064 if (k_o == nullptr) return nullptr;
2065 }
2066 InstanceKlass* k = InstanceKlass::cast(k_o);
2067 Symbol* name = cp->uncached_name_ref_at(index);
2068 Symbol* sig = cp->uncached_signature_ref_at(index);
2069 fieldDescriptor fd;
2070 Klass* target_klass = k->find_field(name, sig, &fd);
2071 if (target_klass == nullptr) {
2072 THROW_MSG_NULL(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2073 }
2074 oop field = Reflection::new_field(&fd, CHECK_NULL);
2075 return JNIHandles::make_local(THREAD, field);
2076 }
2077
2078 JVM_ENTRY_PROF(jobject, JVM_ConstantPoolGetFieldAt, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jint index))
2079 {
2080 JvmtiVMObjectAllocEventCollector oam;
2081 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2082 bounds_check(cp, index, CHECK_NULL);
2083 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2084 return res;
2085 }
2086 JVM_END
2087
2088 JVM_ENTRY_PROF(jobject, JVM_ConstantPoolGetFieldAtIfLoaded, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jint index))
2089 {
2090 JvmtiVMObjectAllocEventCollector oam;
2091 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2092 bounds_check(cp, index, CHECK_NULL);
2093 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2094 return res;
2095 }
2096 JVM_END
2097
2098 JVM_ENTRY_PROF(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jint index))
2099 {
2100 JvmtiVMObjectAllocEventCollector oam;
2101 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2102 bounds_check(cp, index, CHECK_NULL);
2103 constantTag tag = cp->tag_at(index);
2104 if (!tag.is_field_or_method()) {
2105 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2106 }
2107 int klass_ref = cp->uncached_klass_ref_index_at(index);
2108 Symbol* klass_name = cp->klass_name_at(klass_ref);
2109 Symbol* member_name = cp->uncached_name_ref_at(index);
2110 Symbol* member_sig = cp->uncached_signature_ref_at(index);
2111 objArrayOop dest_o = oopFactory::new_objArray(vmClasses::String_klass(), 3, CHECK_NULL);
2112 objArrayHandle dest(THREAD, dest_o);
2113 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2114 dest->obj_at_put(0, str());
2115 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2116 dest->obj_at_put(1, str());
2117 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2118 dest->obj_at_put(2, str());
2119 return (jobjectArray) JNIHandles::make_local(THREAD, dest());
2120 }
2121 JVM_END
2122
2123 JVM_ENTRY_PROF(jint, JVM_ConstantPoolGetClassRefIndexAt, JVM_ConstantPoolGetClassRefIndexAt(JNIEnv *env, jobject obj, jint index))
2124 {
2125 JvmtiVMObjectAllocEventCollector oam;
2126 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2127 bounds_check(cp, index, CHECK_0);
2128 constantTag tag = cp->tag_at(index);
2129 if (!tag.is_field_or_method()) {
2130 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2131 }
2132 return (jint) cp->uncached_klass_ref_index_at(index);
2133 }
2134 JVM_END
2135
2136 JVM_ENTRY_PROF(jint, JVM_ConstantPoolGetNameAndTypeRefIndexAt, JVM_ConstantPoolGetNameAndTypeRefIndexAt(JNIEnv *env, jobject obj, jint index))
2137 {
2138 JvmtiVMObjectAllocEventCollector oam;
2139 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2140 bounds_check(cp, index, CHECK_0);
2141 constantTag tag = cp->tag_at(index);
2142 if (!tag.is_invoke_dynamic() && !tag.is_field_or_method()) {
2143 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2144 }
2145 return (jint) cp->uncached_name_and_type_ref_index_at(index);
2146 }
2147 JVM_END
2148
2149 JVM_ENTRY_PROF(jobjectArray, JVM_ConstantPoolGetNameAndTypeRefInfoAt, JVM_ConstantPoolGetNameAndTypeRefInfoAt(JNIEnv *env, jobject obj, jint index))
2150 {
2151 JvmtiVMObjectAllocEventCollector oam;
2152 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2153 bounds_check(cp, index, CHECK_NULL);
2154 constantTag tag = cp->tag_at(index);
2155 if (!tag.is_name_and_type()) {
2156 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2157 }
2158 Symbol* member_name = cp->symbol_at(cp->name_ref_index_at(index));
2159 Symbol* member_sig = cp->symbol_at(cp->signature_ref_index_at(index));
2160 objArrayOop dest_o = oopFactory::new_objArray(vmClasses::String_klass(), 2, CHECK_NULL);
2161 objArrayHandle dest(THREAD, dest_o);
2162 Handle str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2163 dest->obj_at_put(0, str());
2164 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2165 dest->obj_at_put(1, str());
2166 return (jobjectArray) JNIHandles::make_local(THREAD, dest());
2167 }
2168 JVM_END
2169
2170 JVM_ENTRY_PROF(jint, JVM_ConstantPoolGetIntAt, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jint index))
2171 {
2172 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2173 bounds_check(cp, index, CHECK_0);
2174 constantTag tag = cp->tag_at(index);
2175 if (!tag.is_int()) {
2176 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2177 }
2178 return cp->int_at(index);
2179 }
2180 JVM_END
2181
2182 JVM_ENTRY_PROF(jlong, JVM_ConstantPoolGetLongAt, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jint index))
2183 {
2184 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2185 bounds_check(cp, index, CHECK_(0L));
2186 constantTag tag = cp->tag_at(index);
2187 if (!tag.is_long()) {
2188 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2189 }
2190 return cp->long_at(index);
2191 }
2192 JVM_END
2193
2194 JVM_ENTRY_PROF(jfloat, JVM_ConstantPoolGetFloatAt, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jint index))
2195 {
2196 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2197 bounds_check(cp, index, CHECK_(0.0f));
2198 constantTag tag = cp->tag_at(index);
2199 if (!tag.is_float()) {
2200 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2201 }
2202 return cp->float_at(index);
2203 }
2204 JVM_END
2205
2206 JVM_ENTRY_PROF(jdouble, JVM_ConstantPoolGetDoubleAt, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jint index))
2207 {
2208 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2209 bounds_check(cp, index, CHECK_(0.0));
2210 constantTag tag = cp->tag_at(index);
2211 if (!tag.is_double()) {
2212 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2213 }
2214 return cp->double_at(index);
2215 }
2216 JVM_END
2217
2218 JVM_ENTRY_PROF(jstring, JVM_ConstantPoolGetStringAt, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jint index))
2219 {
2220 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2221 bounds_check(cp, index, CHECK_NULL);
2222 constantTag tag = cp->tag_at(index);
2223 if (!tag.is_string()) {
2224 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2225 }
2226 oop str = cp->string_at(index, CHECK_NULL);
2227 return (jstring) JNIHandles::make_local(THREAD, str);
2228 }
2229 JVM_END
2230
2231 JVM_ENTRY_PROF(jstring, JVM_ConstantPoolGetUTF8At, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jint index))
2232 {
2233 JvmtiVMObjectAllocEventCollector oam;
2234 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2235 bounds_check(cp, index, CHECK_NULL);
2236 constantTag tag = cp->tag_at(index);
2237 if (!tag.is_symbol()) {
2238 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2239 }
2240 Symbol* sym = cp->symbol_at(index);
2241 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2242 return (jstring) JNIHandles::make_local(THREAD, str());
2243 }
2244 JVM_END
2245
2246 JVM_ENTRY_PROF(jbyte, JVM_ConstantPoolGetTagAt, JVM_ConstantPoolGetTagAt(JNIEnv *env, jobject obj, jint index))
2247 {
2248 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2249 bounds_check(cp, index, CHECK_0);
2250 constantTag tag = cp->tag_at(index);
2251 jbyte result = tag.value();
2252 // If returned tag values are not from the JVM spec, e.g. tags from 100 to 105,
2253 // they are changed to the corresponding tags from the JVM spec, so that java code in
2254 // sun.reflect.ConstantPool will return only tags from the JVM spec, not internal ones.
2255 if (tag.is_klass_or_reference()) {
2256 result = JVM_CONSTANT_Class;
2257 } else if (tag.is_string_index()) {
2258 result = JVM_CONSTANT_String;
2259 } else if (tag.is_method_type_in_error()) {
2260 result = JVM_CONSTANT_MethodType;
2261 } else if (tag.is_method_handle_in_error()) {
2262 result = JVM_CONSTANT_MethodHandle;
2263 } else if (tag.is_dynamic_constant_in_error()) {
2264 result = JVM_CONSTANT_Dynamic;
2265 }
2266 return result;
2267 }
2268 JVM_END
2269
2270 // Assertion support. //////////////////////////////////////////////////////////
2271
2272 JVM_ENTRY_PROF(jboolean, JVM_DesiredAssertionStatus, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2273 assert(cls != nullptr, "bad class");
2274
2275 oop r = JNIHandles::resolve(cls);
2276 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2277 if (java_lang_Class::is_primitive(r)) return false;
2278
2279 Klass* k = java_lang_Class::as_Klass(r);
2280 assert(k->is_instance_klass(), "must be an instance klass");
2281 if (!k->is_instance_klass()) return false;
2282
2283 ResourceMark rm(THREAD);
2284 const char* name = k->name()->as_C_string();
2285 bool system_class = k->class_loader() == nullptr;
2286 return JavaAssertions::enabled(name, system_class);
2287
2288 JVM_END
2289
2290
2291 // Return a new AssertionStatusDirectives object with the fields filled in with
2292 // command-line assertion arguments (i.e., -ea, -da).
2293 JVM_ENTRY_PROF(jobject, JVM_AssertionStatusDirectives, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2294 JvmtiVMObjectAllocEventCollector oam;
2295 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2296 return JNIHandles::make_local(THREAD, asd);
2297 JVM_END
2298
2299 // Verification ////////////////////////////////////////////////////////////////////////////////
2300
2301 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2302
2303 // RedefineClasses support: bug 6214132 caused verification to fail.
2304 // All functions from this section should call the jvmtiThreadSate function:
2305 // Klass* class_to_verify_considering_redefinition(Klass* klass).
2306 // The function returns a Klass* of the _scratch_class if the verifier
2307 // was invoked in the middle of the class redefinition.
2308 // Otherwise it returns its argument value which is the _the_class Klass*.
2309 // Please, refer to the description in the jvmtiThreadState.hpp.
2310
2311 JVM_ENTRY_PROF(jboolean, JVM_IsInterface, JVM_IsInterface(JNIEnv *env, jclass cls))
2312 oop mirror = JNIHandles::resolve_non_null(cls);
2313 if (java_lang_Class::is_primitive(mirror)) {
2314 return JNI_FALSE;
2315 }
2316 Klass* k = java_lang_Class::as_Klass(mirror);
2317 // This isn't necessary since answer is the same since redefinition
2318 // has already checked this matches for the scratch class.
2319 // k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2320 jboolean result = k->is_interface();
2321 assert(!result || k->is_instance_klass(),
2322 "all interfaces are instance types");
2323 return result;
2324 JVM_END
2325
2326
2327 JVM_ENTRY_PROF(const char*, JVM_GetClassNameUTF, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2328 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2329 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2330 return k->name()->as_utf8();
2331 JVM_END
2332
2333
2334 JVM_ENTRY_PROF(void, JVM_GetClassCPTypes, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2335 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2336 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2337 // types will have length zero if this is not an InstanceKlass
2338 // (length is determined by call to JVM_GetClassCPEntriesCount)
2339 if (k->is_instance_klass()) {
2340 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2341 for (int index = cp->length() - 1; index >= 0; index--) {
2342 constantTag tag = cp->tag_at(index);
2343 types[index] = (tag.is_unresolved_klass()) ? (unsigned char) JVM_CONSTANT_Class : tag.value();
2344 }
2345 }
2346 JVM_END
2347
2348
2349 JVM_ENTRY_PROF(jint, JVM_GetClassCPEntriesCount, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2350 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2351 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2352 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->constants()->length();
2353 JVM_END
2354
2355
2356 JVM_ENTRY_PROF(jint, JVM_GetClassFieldsCount, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2357 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2358 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2359 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->java_fields_count();
2360 JVM_END
2361
2362
2363 JVM_ENTRY_PROF(jint, JVM_GetClassMethodsCount, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2364 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2365 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2366 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->methods()->length();
2367 JVM_END
2368
2369
2370 // The following methods, used for the verifier, are never called with
2371 // array klasses, so a direct cast to InstanceKlass is safe.
2372 // Typically, these methods are called in a loop with bounds determined
2373 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2374 // zero for arrays.
2375 JVM_ENTRY_PROF(void, JVM_GetMethodIxExceptionIndexes, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2376 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2377 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2378 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2379 int length = method->checked_exceptions_length();
2380 if (length > 0) {
2381 CheckedExceptionElement* table= method->checked_exceptions_start();
2382 for (int i = 0; i < length; i++) {
2383 exceptions[i] = table[i].class_cp_index;
2384 }
2385 }
2386 JVM_END
2387
2388
2389 JVM_ENTRY_PROF(jint, JVM_GetMethodIxExceptionsCount, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2390 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2391 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2392 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2393 return method->checked_exceptions_length();
2394 JVM_END
2395
2396
2397 JVM_ENTRY_PROF(void, JVM_GetMethodIxByteCode, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2398 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2399 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2400 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2401 memcpy(code, method->code_base(), method->code_size());
2402 JVM_END
2403
2404
2405 JVM_ENTRY_PROF(jint, JVM_GetMethodIxByteCodeLength, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2406 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2407 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2408 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2409 return method->code_size();
2410 JVM_END
2411
2412
2413 JVM_ENTRY_PROF(void, JVM_GetMethodIxExceptionTableEntry, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2414 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2415 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2416 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2417 ExceptionTable extable(method);
2418 entry->start_pc = extable.start_pc(entry_index);
2419 entry->end_pc = extable.end_pc(entry_index);
2420 entry->handler_pc = extable.handler_pc(entry_index);
2421 entry->catchType = extable.catch_type_index(entry_index);
2422 JVM_END
2423
2424
2425 JVM_ENTRY_PROF(jint, JVM_GetMethodIxExceptionTableLength, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2426 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2427 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2428 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2429 return method->exception_table_length();
2430 JVM_END
2431
2432
2433 JVM_ENTRY_PROF(jint, JVM_GetMethodIxModifiers, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2434 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2435 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2436 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2437 return method->access_flags().as_method_flags();
2438 JVM_END
2439
2440
2441 JVM_ENTRY_PROF(jint, JVM_GetFieldIxModifiers, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2442 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2443 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2444 return InstanceKlass::cast(k)->field_access_flags(field_index);
2445 JVM_END
2446
2447
2448 JVM_ENTRY_PROF(jint, JVM_GetMethodIxLocalsCount, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2449 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2450 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2451 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2452 return method->max_locals();
2453 JVM_END
2454
2455
2456 JVM_ENTRY_PROF(jint, JVM_GetMethodIxArgsSize, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2457 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2458 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2459 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2460 return method->size_of_parameters();
2461 JVM_END
2462
2463
2464 JVM_ENTRY_PROF(jint, JVM_GetMethodIxMaxStack, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2465 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2466 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2467 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2468 return method->verifier_max_stack();
2469 JVM_END
2470
2471
2472 JVM_ENTRY_PROF(jboolean, JVM_IsConstructorIx, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2473 ResourceMark rm(THREAD);
2474 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2475 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2476 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2477 return method->name() == vmSymbols::object_initializer_name();
2478 JVM_END
2479
2480
2481 JVM_ENTRY_PROF(jboolean, JVM_IsVMGeneratedMethodIx, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2482 ResourceMark rm(THREAD);
2483 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2484 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2485 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2486 return method->is_overpass();
2487 JVM_END
2488
2489 JVM_ENTRY_PROF(const char*, JVM_GetMethodIxNameUTF, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2490 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2491 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2492 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2493 return method->name()->as_utf8();
2494 JVM_END
2495
2496
2497 JVM_ENTRY_PROF(const char*, JVM_GetMethodIxSignatureUTF, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2498 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2499 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2500 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2501 return method->signature()->as_utf8();
2502 JVM_END
2503
2504 /**
2505 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2506 * read entries in the constant pool. Since the old verifier always
2507 * works on a copy of the code, it will not see any rewriting that
2508 * may possibly occur in the middle of verification. So it is important
2509 * that nothing it calls tries to use the cpCache instead of the raw
2510 * constant pool, so we must use cp->uncached_x methods when appropriate.
2511 */
2512 JVM_ENTRY_PROF(const char*, JVM_GetCPFieldNameUTF, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2513 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2514 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2515 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2516 switch (cp->tag_at(cp_index).value()) {
2517 case JVM_CONSTANT_Fieldref:
2518 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2519 default:
2520 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2521 }
2522 ShouldNotReachHere();
2523 return nullptr;
2524 JVM_END
2525
2526
2527 JVM_ENTRY_PROF(const char*, JVM_GetCPMethodNameUTF, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2528 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2529 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2530 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2531 switch (cp->tag_at(cp_index).value()) {
2532 case JVM_CONSTANT_InterfaceMethodref:
2533 case JVM_CONSTANT_Methodref:
2534 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2535 default:
2536 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2537 }
2538 ShouldNotReachHere();
2539 return nullptr;
2540 JVM_END
2541
2542
2543 JVM_ENTRY_PROF(const char*, JVM_GetCPMethodSignatureUTF, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2544 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2545 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2546 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2547 switch (cp->tag_at(cp_index).value()) {
2548 case JVM_CONSTANT_InterfaceMethodref:
2549 case JVM_CONSTANT_Methodref:
2550 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2551 default:
2552 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2553 }
2554 ShouldNotReachHere();
2555 return nullptr;
2556 JVM_END
2557
2558
2559 JVM_ENTRY_PROF(const char*, JVM_GetCPFieldSignatureUTF, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2560 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2561 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2562 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2563 switch (cp->tag_at(cp_index).value()) {
2564 case JVM_CONSTANT_Fieldref:
2565 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2566 default:
2567 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2568 }
2569 ShouldNotReachHere();
2570 return nullptr;
2571 JVM_END
2572
2573
2574 JVM_ENTRY_PROF(const char*, JVM_GetCPClassNameUTF, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2575 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2576 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2577 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2578 Symbol* classname = cp->klass_name_at(cp_index);
2579 return classname->as_utf8();
2580 JVM_END
2581
2582
2583 JVM_ENTRY_PROF(const char*, JVM_GetCPFieldClassNameUTF, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2584 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2585 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2586 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2587 switch (cp->tag_at(cp_index).value()) {
2588 case JVM_CONSTANT_Fieldref: {
2589 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2590 Symbol* classname = cp->klass_name_at(class_index);
2591 return classname->as_utf8();
2592 }
2593 default:
2594 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2595 }
2596 ShouldNotReachHere();
2597 return nullptr;
2598 JVM_END
2599
2600
2601 JVM_ENTRY_PROF(const char*, JVM_GetCPMethodClassNameUTF, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2602 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2603 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2604 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2605 switch (cp->tag_at(cp_index).value()) {
2606 case JVM_CONSTANT_Methodref:
2607 case JVM_CONSTANT_InterfaceMethodref: {
2608 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2609 Symbol* classname = cp->klass_name_at(class_index);
2610 return classname->as_utf8();
2611 }
2612 default:
2613 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2614 }
2615 ShouldNotReachHere();
2616 return nullptr;
2617 JVM_END
2618
2619
2620 JVM_ENTRY_PROF(jint, JVM_GetCPFieldModifiers, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2621 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2622 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2623 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2624 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2625 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2626 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2627 switch (cp->tag_at(cp_index).value()) {
2628 case JVM_CONSTANT_Fieldref: {
2629 Symbol* name = cp->uncached_name_ref_at(cp_index);
2630 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2631 InstanceKlass* ik = InstanceKlass::cast(k_called);
2632 for (JavaFieldStream fs(ik); !fs.done(); fs.next()) {
2633 if (fs.name() == name && fs.signature() == signature) {
2634 return fs.access_flags().as_field_flags();
2635 }
2636 }
2637 return -1;
2638 }
2639 default:
2640 fatal("JVM_GetCPFieldModifiers: illegal constant");
2641 }
2642 ShouldNotReachHere();
2643 return 0;
2644 JVM_END
2645
2646
2647 JVM_ENTRY_PROF(jint, JVM_GetCPMethodModifiers, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2648 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2649 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2650 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2651 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2652 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2653 switch (cp->tag_at(cp_index).value()) {
2654 case JVM_CONSTANT_Methodref:
2655 case JVM_CONSTANT_InterfaceMethodref: {
2656 Symbol* name = cp->uncached_name_ref_at(cp_index);
2657 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2658 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2659 int methods_count = methods->length();
2660 for (int i = 0; i < methods_count; i++) {
2661 Method* method = methods->at(i);
2662 if (method->name() == name && method->signature() == signature) {
2663 return method->access_flags().as_method_flags();
2664 }
2665 }
2666 return -1;
2667 }
2668 default:
2669 fatal("JVM_GetCPMethodModifiers: illegal constant");
2670 }
2671 ShouldNotReachHere();
2672 return 0;
2673 JVM_END
2674
2675
2676 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2677
2678 JVM_LEAF_PROF(void, JVM_ReleaseUTF, JVM_ReleaseUTF(const char *utf))
2679 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2680 JVM_END
2681
2682
2683 JVM_ENTRY_PROF(jboolean, JVM_IsSameClassPackage, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2684 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2685 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2686 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2687 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2688 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2689 JVM_END
2690
2691 // Printing support //////////////////////////////////////////////////
2692 extern "C" {
2693
2694 ATTRIBUTE_PRINTF(3, 0)
2695 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2696 // Reject count values that are negative signed values converted to
2697 // unsigned; see bug 4399518, 4417214
2698 if ((intptr_t)count <= 0) return -1;
2699
2700 int result = os::vsnprintf(str, count, fmt, args);
2701 if (result > 0 && (size_t)result >= count) {
2702 result = -1;
2703 }
2762 // In most of the JVM thread support functions we need to access the
2763 // thread through a ThreadsListHandle to prevent it from exiting and
2764 // being reclaimed while we try to operate on it. The exceptions to this
2765 // rule are when operating on the current thread, or if the monitor of
2766 // the target java.lang.Thread is locked at the Java level - in both
2767 // cases the target cannot exit.
2768
2769 static void thread_entry(JavaThread* thread, TRAPS) {
2770 HandleMark hm(THREAD);
2771 Handle obj(THREAD, thread->threadObj());
2772 JavaValue result(T_VOID);
2773 JavaCalls::call_virtual(&result,
2774 obj,
2775 vmClasses::Thread_klass(),
2776 vmSymbols::run_method_name(),
2777 vmSymbols::void_method_signature(),
2778 THREAD);
2779 }
2780
2781
2782 JVM_ENTRY_PROF(void, JVM_StartThread, JVM_StartThread(JNIEnv* env, jobject jthread))
2783 #if INCLUDE_CDS
2784 if (CDSConfig::allow_only_single_java_thread()) {
2785 // During java -Xshare:dump, if we allow multiple Java threads to
2786 // execute in parallel, symbols and classes may be loaded in
2787 // random orders which will make the resulting CDS archive
2788 // non-deterministic.
2789 //
2790 // Lucikly, during java -Xshare:dump, it's important to run only
2791 // the code in the main Java thread (which is NOT started here) that
2792 // creates the module graph, etc. It's safe to not start the other
2793 // threads which are launched by class static initializers
2794 // (ReferenceHandler, FinalizerThread and CleanerImpl).
2795 if (log_is_enabled(Info, aot)) {
2796 ResourceMark rm;
2797 oop t = JNIHandles::resolve_non_null(jthread);
2798 log_info(aot)("JVM_StartThread() ignored: %s", t->klass()->external_name());
2799 }
2800 return;
2801 }
2802 #endif
2859 log_warning(os, thread)("Failed to start the native thread for java.lang.Thread \"%s\"",
2860 JavaThread::name_for(JNIHandles::resolve_non_null(jthread)));
2861 // No one should hold a reference to the 'native_thread'.
2862 native_thread->smr_delete();
2863 if (JvmtiExport::should_post_resource_exhausted()) {
2864 JvmtiExport::post_resource_exhausted(
2865 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2866 os::native_thread_creation_failed_msg());
2867 }
2868 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2869 os::native_thread_creation_failed_msg());
2870 }
2871
2872 JFR_ONLY(Jfr::on_java_thread_start(thread, native_thread);)
2873
2874 Thread::start(native_thread);
2875
2876 JVM_END
2877
2878
2879 JVM_ENTRY_PROF(void, JVM_SetThreadPriority, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
2880 ThreadsListHandle tlh(thread);
2881 oop java_thread = nullptr;
2882 JavaThread* receiver = nullptr;
2883 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, &java_thread);
2884 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
2885
2886 if (is_alive) {
2887 // jthread refers to a live JavaThread.
2888 Thread::set_priority(receiver, (ThreadPriority)prio);
2889 }
2890 // Implied else: If the JavaThread hasn't started yet, then the
2891 // priority set in the java.lang.Thread object above will be pushed
2892 // down when it does start.
2893 JVM_END
2894
2895
2896 JVM_LEAF_PROF(void, JVM_Yield, JVM_Yield(JNIEnv *env, jclass threadClass))
2897 HOTSPOT_THREAD_YIELD();
2898 os::naked_yield();
2899 JVM_END
2900
2901 JVM_ENTRY_PROF(void, JVM_SleepNanos, JVM_SleepNanos(JNIEnv* env, jclass threadClass, jlong nanos))
2902 if (nanos < 0) {
2903 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "nanosecond timeout value out of range");
2904 }
2905
2906 if (thread->is_interrupted(true) && !HAS_PENDING_EXCEPTION) {
2907 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2908 }
2909
2910 // Save current thread state and restore it at the end of this block.
2911 // And set new thread state to SLEEPING.
2912 JavaThreadSleepState jtss(thread);
2913
2914 HOTSPOT_THREAD_SLEEP_BEGIN(nanos / NANOSECS_PER_MILLISEC);
2915
2916 if (nanos == 0) {
2917 os::naked_yield();
2918 } else {
2919 ThreadState old_state = thread->osthread()->get_state();
2920 thread->osthread()->set_state(SLEEPING);
2921 if (!thread->sleep_nanos(nanos)) { // interrupted or async exception was installed
2922 // An asynchronous exception could have been thrown on
2923 // us while we were sleeping. We do not overwrite those.
2924 if (!HAS_PENDING_EXCEPTION) {
2925 HOTSPOT_THREAD_SLEEP_END(1);
2926 if (!thread->has_async_exception_condition()) {
2927 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
2928 // to properly restore the thread state. That's likely wrong.
2929 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2930 }
2931 }
2932 }
2933 thread->osthread()->set_state(old_state);
2934 }
2935 HOTSPOT_THREAD_SLEEP_END(0);
2936 JVM_END
2937
2938 JVM_ENTRY_PROF(jobject, JVM_CurrentCarrierThread, JVM_CurrentCarrierThread(JNIEnv* env, jclass threadClass))
2939 oop jthread = thread->threadObj();
2940 assert(jthread != nullptr, "no current carrier thread!");
2941 return JNIHandles::make_local(THREAD, jthread);
2942 JVM_END
2943
2944 JVM_ENTRY_PROF(jobject, JVM_CurrentThread, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
2945 oop theThread = thread->vthread();
2946 assert(theThread != (oop)nullptr, "no current thread!");
2947 return JNIHandles::make_local(THREAD, theThread);
2948 JVM_END
2949
2950 JVM_ENTRY_PROF(void, JVM_SetCurrentThread, JVM_SetCurrentThread(JNIEnv* env, jobject thisThread,
2951 jobject theThread))
2952 oop threadObj = JNIHandles::resolve(theThread);
2953 thread->set_vthread(threadObj);
2954
2955 // Set _monitor_owner_id of new current Thread
2956 thread->set_monitor_owner_id(java_lang_Thread::thread_id(threadObj));
2957
2958 JFR_ONLY(Jfr::on_set_current_thread(thread, threadObj);)
2959 JVM_END
2960
2961 JVM_ENTRY_PROF(jlong, JVM_GetNextThreadIdOffset, JVM_GetNextThreadIdOffset(JNIEnv* env, jclass threadClass))
2962 return ThreadIdentifier::unsafe_offset();
2963 JVM_END
2964
2965 JVM_ENTRY_PROF(void, JVM_Interrupt, JVM_Interrupt(JNIEnv* env, jobject jthread))
2966 ThreadsListHandle tlh(thread);
2967 JavaThread* receiver = nullptr;
2968 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, nullptr);
2969 if (is_alive) {
2970 // jthread refers to a live JavaThread.
2971 receiver->interrupt();
2972 }
2973 JVM_END
2974
2975 // Return true iff the current thread has locked the object passed in
2976
2977 JVM_ENTRY_PROF(jboolean, JVM_HoldsLock, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
2978 if (obj == nullptr) {
2979 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
2980 }
2981 Handle h_obj(THREAD, JNIHandles::resolve(obj));
2982 return ObjectSynchronizer::current_thread_holds_lock(thread, h_obj);
2983 JVM_END
2984
2985 JVM_ENTRY_PROF(jobject, JVM_GetStackTrace, JVM_GetStackTrace(JNIEnv *env, jobject jthread))
2986 oop trace = java_lang_Thread::async_get_stack_trace(jthread, THREAD);
2987 return JNIHandles::make_local(THREAD, trace);
2988 JVM_END
2989
2990 JVM_ENTRY_PROF(jobject, JVM_CreateThreadSnapshot, JVM_CreateThreadSnapshot(JNIEnv* env, jobject jthread))
2991 #if INCLUDE_JVMTI
2992 oop snapshot = ThreadSnapshotFactory::get_thread_snapshot(jthread, THREAD);
2993 return JNIHandles::make_local(THREAD, snapshot);
2994 #else
2995 THROW_NULL(vmSymbols::java_lang_UnsupportedOperationException());
2996 #endif
2997 JVM_END
2998
2999 JVM_ENTRY_PROF(void, JVM_SetNativeThreadName, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3000 // We don't use a ThreadsListHandle here because the current thread
3001 // must be alive.
3002 oop java_thread = JNIHandles::resolve_non_null(jthread);
3003 JavaThread* thr = java_lang_Thread::thread(java_thread);
3004 if (thread == thr && !thr->has_attached_via_jni()) {
3005 // Thread naming is only supported for the current thread and
3006 // we don't set the name of an attached thread to avoid stepping
3007 // on other programs.
3008 ResourceMark rm(thread);
3009 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3010 os::set_native_thread_name(thread_name);
3011 }
3012 JVM_END
3013
3014 JVM_ENTRY_PROF(jobject, JVM_ScopedValueCache, JVM_ScopedValueCache(JNIEnv* env, jclass threadClass))
3015 oop theCache = thread->scopedValueCache();
3016 return JNIHandles::make_local(THREAD, theCache);
3017 JVM_END
3018
3019 JVM_ENTRY_PROF(void, JVM_SetScopedValueCache, JVM_SetScopedValueCache(JNIEnv* env, jclass threadClass,
3020 jobject theCache))
3021 arrayOop objs = arrayOop(JNIHandles::resolve(theCache));
3022 thread->set_scopedValueCache(objs);
3023 JVM_END
3024
3025 // java.lang.Package ////////////////////////////////////////////////////////////////
3026
3027
3028 JVM_ENTRY_PROF(jstring, JVM_GetSystemPackage, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3029 ResourceMark rm(THREAD);
3030 JvmtiVMObjectAllocEventCollector oam;
3031 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3032 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3033 return (jstring) JNIHandles::make_local(THREAD, result);
3034 JVM_END
3035
3036
3037 JVM_ENTRY_PROF(jobjectArray, JVM_GetSystemPackages, JVM_GetSystemPackages(JNIEnv *env))
3038 JvmtiVMObjectAllocEventCollector oam;
3039 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3040 return (jobjectArray) JNIHandles::make_local(THREAD, result);
3041 JVM_END
3042
3043
3044 // java.lang.ref.Reference ///////////////////////////////////////////////////////////////
3045
3046
3047 JVM_ENTRY_PROF(jobject, JVM_GetAndClearReferencePendingList, JVM_GetAndClearReferencePendingList(JNIEnv* env))
3048 MonitorLocker ml(Heap_lock);
3049 oop ref = Universe::reference_pending_list();
3050 if (ref != nullptr) {
3051 Universe::clear_reference_pending_list();
3052 }
3053 return JNIHandles::make_local(THREAD, ref);
3054 JVM_END
3055
3056 JVM_ENTRY_PROF(jboolean, JVM_HasReferencePendingList, JVM_HasReferencePendingList(JNIEnv* env))
3057 MonitorLocker ml(Heap_lock);
3058 return Universe::has_reference_pending_list();
3059 JVM_END
3060
3061 JVM_ENTRY_PROF(void, JVM_WaitForReferencePendingList, JVM_WaitForReferencePendingList(JNIEnv* env))
3062 MonitorLocker ml(Heap_lock);
3063 while (!Universe::has_reference_pending_list()) {
3064 ml.wait();
3065 }
3066 JVM_END
3067
3068 JVM_ENTRY_PROF(jobject, JVM_ReferenceGet, JVM_ReferenceGet(JNIEnv* env, jobject ref))
3069 oop ref_oop = JNIHandles::resolve_non_null(ref);
3070 // PhantomReference has its own implementation of get().
3071 assert(!java_lang_ref_Reference::is_phantom(ref_oop), "precondition");
3072 oop referent = java_lang_ref_Reference::weak_referent(ref_oop);
3073 return JNIHandles::make_local(THREAD, referent);
3074 JVM_END
3075
3076 JVM_ENTRY_PROF(jboolean, JVM_ReferenceRefersTo, JVM_ReferenceRefersTo(JNIEnv* env, jobject ref, jobject o))
3077 oop ref_oop = JNIHandles::resolve_non_null(ref);
3078 // PhantomReference has its own implementation of refersTo().
3079 // See: JVM_PhantomReferenceRefersTo
3080 assert(!java_lang_ref_Reference::is_phantom(ref_oop), "precondition");
3081 oop referent = java_lang_ref_Reference::weak_referent_no_keepalive(ref_oop);
3082 return referent == JNIHandles::resolve(o);
3083 JVM_END
3084
3085 JVM_ENTRY_PROF(void, JVM_ReferenceClear, JVM_ReferenceClear(JNIEnv* env, jobject ref))
3086 oop ref_oop = JNIHandles::resolve_non_null(ref);
3087 // FinalReference has it's own implementation of clear().
3088 assert(!java_lang_ref_Reference::is_final(ref_oop), "precondition");
3089 if (java_lang_ref_Reference::unknown_referent_no_keepalive(ref_oop) == nullptr) {
3090 // If the referent has already been cleared then done.
3091 // However, if the referent is dead but has not yet been cleared by
3092 // concurrent reference processing, it should NOT be cleared here.
3093 // Instead, clearing should be left to the GC. Clearing it here could
3094 // detectably lose an expected notification, which is impossible with
3095 // STW reference processing. The clearing in enqueue() doesn't have
3096 // this problem, since the enqueue covers the notification, but it's not
3097 // worth the effort to handle that case specially.
3098 return;
3099 }
3100 java_lang_ref_Reference::clear_referent(ref_oop);
3101 JVM_END
3102
3103
3104 // java.lang.ref.PhantomReference //////////////////////////////////////////////////
3105
3106
3107 JVM_ENTRY_PROF(jboolean, JVM_PhantomReferenceRefersTo, JVM_PhantomReferenceRefersTo(JNIEnv* env, jobject ref, jobject o))
3108 oop ref_oop = JNIHandles::resolve_non_null(ref);
3109 oop referent = java_lang_ref_Reference::phantom_referent_no_keepalive(ref_oop);
3110 return referent == JNIHandles::resolve(o);
3111 JVM_END
3112
3113
3114 // ObjectInputStream ///////////////////////////////////////////////////////////////
3115
3116 // Return the first user-defined class loader up the execution stack, or null
3117 // if only code from the bootstrap or platform class loader is on the stack.
3118
3119 JVM_ENTRY_PROF(jobject, JVM_LatestUserDefinedLoader, JVM_LatestUserDefinedLoader(JNIEnv *env))
3120 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3121 InstanceKlass* ik = vfst.method()->method_holder();
3122 oop loader = ik->class_loader();
3123 if (loader != nullptr && !SystemDictionary::is_platform_class_loader(loader)) {
3124 return JNIHandles::make_local(THREAD, loader);
3125 }
3126 }
3127 return nullptr;
3128 JVM_END
3129
3130
3131 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3132
3133
3134 // resolve array handle and check arguments
3135 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3136 if (arr == nullptr) {
3137 THROW_NULL(vmSymbols::java_lang_NullPointerException());
3138 }
3139 oop a = JNIHandles::resolve_non_null(arr);
3140 if (!a->is_array()) {
3141 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3142 } else if (type_array_only && !a->is_typeArray()) {
3143 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array of primitive type");
3144 }
3145 return arrayOop(a);
3146 }
3147
3148
3149 JVM_ENTRY_PROF(jint, JVM_GetArrayLength, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3150 arrayOop a = check_array(env, arr, false, CHECK_0);
3151 return a->length();
3152 JVM_END
3153
3154
3155 JVM_ENTRY_PROF(jobject, JVM_GetArrayElement, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3156 JvmtiVMObjectAllocEventCollector oam;
3157 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3158 jvalue value;
3159 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3160 oop box = Reflection::box(&value, type, CHECK_NULL);
3161 return JNIHandles::make_local(THREAD, box);
3162 JVM_END
3163
3164
3165 JVM_ENTRY_PROF(jvalue, JVM_GetPrimitiveArrayElement, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3166 jvalue value;
3167 value.i = 0; // to initialize value before getting used in CHECK
3168 arrayOop a = check_array(env, arr, true, CHECK_(value));
3169 assert(a->is_typeArray(), "just checking");
3170 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3171 BasicType wide_type = (BasicType) wCode;
3172 if (type != wide_type) {
3173 Reflection::widen(&value, type, wide_type, CHECK_(value));
3174 }
3175 return value;
3176 JVM_END
3177
3178
3179 JVM_ENTRY_PROF(void, JVM_SetArrayElement, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3180 arrayOop a = check_array(env, arr, false, CHECK);
3181 oop box = JNIHandles::resolve(val);
3182 jvalue value;
3183 value.i = 0; // to initialize value before getting used in CHECK
3184 BasicType value_type;
3185 if (a->is_objArray()) {
3186 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3187 value_type = Reflection::unbox_for_regular_object(box, &value);
3188 } else {
3189 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3190 }
3191 Reflection::array_set(&value, a, index, value_type, CHECK);
3192 JVM_END
3193
3194
3195 JVM_ENTRY_PROF(void, JVM_SetPrimitiveArrayElement, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3196 arrayOop a = check_array(env, arr, true, CHECK);
3197 assert(a->is_typeArray(), "just checking");
3198 BasicType value_type = (BasicType) vCode;
3199 Reflection::array_set(&v, a, index, value_type, CHECK);
3200 JVM_END
3201
3202
3203 JVM_ENTRY_PROF(jobject, JVM_NewArray, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3204 JvmtiVMObjectAllocEventCollector oam;
3205 oop element_mirror = JNIHandles::resolve(eltClass);
3206 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3207 return JNIHandles::make_local(THREAD, result);
3208 JVM_END
3209
3210
3211 JVM_ENTRY_PROF(jobject, JVM_NewMultiArray, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3212 JvmtiVMObjectAllocEventCollector oam;
3213 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3214 oop element_mirror = JNIHandles::resolve(eltClass);
3215 assert(dim_array->is_typeArray(), "just checking");
3216 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3217 return JNIHandles::make_local(THREAD, result);
3218 JVM_END
3219
3220
3221 // Library support ///////////////////////////////////////////////////////////////////////////
3222
3223 JVM_LEAF_PROF(void*, JVM_LoadZipLibrary, JVM_LoadZipLibrary())
3224 return ZipLibrary::handle();
3225 JVM_END
3226
3227 JVM_ENTRY_NO_ENV_PROF(void*, JVM_LoadLibrary, JVM_LoadLibrary(const char* name, jboolean throwException))
3228 //%note jvm_ct
3229 char ebuf[1024];
3230 void *load_result;
3231 {
3232 ThreadToNativeFromVM ttnfvm(thread);
3233 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3234 }
3235 if (load_result == nullptr) {
3236 if (throwException) {
3237 char msg[1024];
3238 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3239 // Since 'ebuf' may contain a string encoded using
3240 // platform encoding scheme, we need to pass
3241 // Exceptions::unsafe_to_utf8 to the new_exception method
3242 // as the last argument. See bug 6367357.
3243 Handle h_exception =
3244 Exceptions::new_exception(thread,
3245 vmSymbols::java_lang_UnsatisfiedLinkError(),
3246 msg, Exceptions::unsafe_to_utf8);
3247
3248 THROW_HANDLE_NULL(h_exception);
3249 } else {
3250 log_info(library)("Failed to load library %s", name);
3251 return load_result;
3252 }
3253 }
3254 log_info(library)("Loaded library %s, handle " INTPTR_FORMAT, name, p2i(load_result));
3255 return load_result;
3256 JVM_END
3257
3258
3259 JVM_LEAF_PROF(void, JVM_UnloadLibrary, JVM_UnloadLibrary(void* handle))
3260 os::dll_unload(handle);
3261 log_info(library)("Unloaded library with handle " INTPTR_FORMAT, p2i(handle));
3262 JVM_END
3263
3264
3265 JVM_LEAF_PROF(void*, JVM_FindLibraryEntry, JVM_FindLibraryEntry(void* handle, const char* name))
3266 void* find_result = os::dll_lookup(handle, name);
3267 log_info(library)("%s %s in library with handle " INTPTR_FORMAT,
3268 find_result != nullptr ? "Found" : "Failed to find",
3269 name, p2i(handle));
3270 return find_result;
3271 JVM_END
3272
3273
3274 // JNI version ///////////////////////////////////////////////////////////////////////////////
3275
3276 JVM_LEAF_PROF(jboolean, JVM_IsSupportedJNIVersion, JVM_IsSupportedJNIVersion(jint version))
3277 return Threads::is_supported_jni_version_including_1_1(version);
3278 JVM_END
3279
3280
3281 JVM_LEAF_PROF(jboolean, JVM_IsPreviewEnabled, JVM_IsPreviewEnabled(void))
3282 return Arguments::enable_preview() ? JNI_TRUE : JNI_FALSE;
3283 JVM_END
3284
3285 JVM_LEAF_PROF(jboolean, JVM_IsContinuationsSupported, JVM_IsContinuationsSupported(void))
3286 return VMContinuations ? JNI_TRUE : JNI_FALSE;
3287 JVM_END
3288
3289 JVM_LEAF_PROF(jboolean, JVM_IsForeignLinkerSupported, JVM_IsForeignLinkerSupported(void))
3290 return ForeignGlobals::is_foreign_linker_supported() ? JNI_TRUE : JNI_FALSE;
3291 JVM_END
3292
3293 JVM_LEAF(jboolean, JVM_IsStaticallyLinked(void))
3294 return is_vm_statically_linked() ? JNI_TRUE : JNI_FALSE;
3295 JVM_END
3296
3297 // String support ///////////////////////////////////////////////////////////////////////////
3298
3299 JVM_ENTRY_PROF(jstring, JVM_InternString, JVM_InternString(JNIEnv *env, jstring str))
3300 JvmtiVMObjectAllocEventCollector oam;
3301 if (str == nullptr) return nullptr;
3302 oop string = JNIHandles::resolve_non_null(str);
3303 oop result = StringTable::intern(string, CHECK_NULL);
3304 return (jstring) JNIHandles::make_local(THREAD, result);
3305 JVM_END
3306
3307
3308 // VM Raw monitor support //////////////////////////////////////////////////////////////////////
3309
3310 // VM Raw monitors (not to be confused with JvmtiRawMonitors) are a simple mutual exclusion
3311 // lock (not actually monitors: no wait/notify) that is exported by the VM for use by JDK
3312 // library code. They may be used by JavaThreads and non-JavaThreads and do not participate
3313 // in the safepoint protocol, thread suspension, thread interruption, or most things of that
3314 // nature, except JavaThreads will be blocked by VM_Exit::block_if_vm_exited if the VM has
3315 // shutdown. JavaThreads will be "in native" when using this API from JDK code.
3316
3317
3318 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3319 VM_Exit::block_if_vm_exited();
3339 ((PlatformMutex*) mon)->unlock();
3340 }
3341
3342
3343 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
3344
3345 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init,
3346 Handle loader, jboolean throwError, TRAPS) {
3347 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, throwError != 0, CHECK_NULL);
3348
3349 // Check if we should initialize the class
3350 if (init && klass->is_instance_klass()) {
3351 klass->initialize(CHECK_NULL);
3352 }
3353 return (jclass) JNIHandles::make_local(THREAD, klass->java_mirror());
3354 }
3355
3356
3357 // Method ///////////////////////////////////////////////////////////////////////////////////////////
3358
3359 JVM_ENTRY_PROF(jobject, JVM_InvokeMethod, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
3360 Handle method_handle;
3361 if (thread->stack_overflow_state()->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
3362 method_handle = Handle(THREAD, JNIHandles::resolve(method));
3363 Handle receiver(THREAD, JNIHandles::resolve(obj));
3364 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3365 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
3366 jobject res = JNIHandles::make_local(THREAD, result);
3367 if (JvmtiExport::should_post_vm_object_alloc()) {
3368 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
3369 assert(ret_type != nullptr, "sanity check: ret_type oop must not be null!");
3370 if (java_lang_Class::is_primitive(ret_type)) {
3371 // Only for primitive type vm allocates memory for java object.
3372 // See box() method.
3373 JvmtiExport::post_vm_object_alloc(thread, result);
3374 }
3375 }
3376 return res;
3377 } else {
3378 THROW_NULL(vmSymbols::java_lang_StackOverflowError());
3379 }
3380 JVM_END
3381
3382
3383 JVM_ENTRY_PROF(jobject, JVM_NewInstanceFromConstructor, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
3384 oop constructor_mirror = JNIHandles::resolve(c);
3385 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3386 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
3387 jobject res = JNIHandles::make_local(THREAD, result);
3388 if (JvmtiExport::should_post_vm_object_alloc()) {
3389 JvmtiExport::post_vm_object_alloc(thread, result);
3390 }
3391 return res;
3392 JVM_END
3393
3394 JVM_ENTRY_PROF(void, JVM_InitializeFromArchive, JVM_InitializeFromArchive(JNIEnv* env, jclass cls))
3395 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
3396 HeapShared::initialize_from_archived_subgraph(THREAD, k);
3397 JVM_END
3398
3399 JVM_ENTRY_PROF(void, JVM_RegisterLambdaProxyClassForArchiving, JVM_RegisterLambdaProxyClassForArchiving(JNIEnv* env,
3400 jclass caller,
3401 jstring interfaceMethodName,
3402 jobject factoryType,
3403 jobject interfaceMethodType,
3404 jobject implementationMember,
3405 jobject dynamicMethodType,
3406 jclass lambdaProxyClass))
3407 #if INCLUDE_CDS
3408 if (!CDSConfig::is_dumping_archive() || !CDSConfig::is_dumping_lambdas_in_legacy_mode()) {
3409 return;
3410 }
3411
3412 Klass* caller_k = java_lang_Class::as_Klass(JNIHandles::resolve(caller));
3413 InstanceKlass* caller_ik = InstanceKlass::cast(caller_k);
3414 if (caller_ik->is_hidden()) {
3415 // Hidden classes not of type lambda proxy classes are currently not being archived.
3416 // If the caller_ik is of one of the above types, the corresponding lambda proxy class won't be
3417 // registered for archiving.
3418 return;
3419 }
3427 interface_method_name = java_lang_String::as_symbol(JNIHandles::resolve_non_null(interfaceMethodName));
3428 }
3429 Handle factory_type_oop(THREAD, JNIHandles::resolve_non_null(factoryType));
3430 Symbol* factory_type = java_lang_invoke_MethodType::as_signature(factory_type_oop(), true);
3431
3432 Handle interface_method_type_oop(THREAD, JNIHandles::resolve_non_null(interfaceMethodType));
3433 Symbol* interface_method_type = java_lang_invoke_MethodType::as_signature(interface_method_type_oop(), true);
3434
3435 Handle implementation_member_oop(THREAD, JNIHandles::resolve_non_null(implementationMember));
3436 assert(java_lang_invoke_MemberName::is_method(implementation_member_oop()), "must be");
3437 Method* m = java_lang_invoke_MemberName::vmtarget(implementation_member_oop());
3438
3439 Handle dynamic_method_type_oop(THREAD, JNIHandles::resolve_non_null(dynamicMethodType));
3440 Symbol* dynamic_method_type = java_lang_invoke_MethodType::as_signature(dynamic_method_type_oop(), true);
3441
3442 LambdaProxyClassDictionary::add_lambda_proxy_class(caller_ik, lambda_ik, interface_method_name, factory_type,
3443 interface_method_type, m, dynamic_method_type, THREAD);
3444 #endif // INCLUDE_CDS
3445 JVM_END
3446
3447 JVM_ENTRY_PROF(jclass, JVM_LookupLambdaProxyClassFromArchive, JVM_LookupLambdaProxyClassFromArchive(JNIEnv* env,
3448 jclass caller,
3449 jstring interfaceMethodName,
3450 jobject factoryType,
3451 jobject interfaceMethodType,
3452 jobject implementationMember,
3453 jobject dynamicMethodType))
3454 #if INCLUDE_CDS
3455
3456 if (interfaceMethodName == nullptr || factoryType == nullptr || interfaceMethodType == nullptr ||
3457 implementationMember == nullptr || dynamicMethodType == nullptr) {
3458 THROW_(vmSymbols::java_lang_NullPointerException(), nullptr);
3459 }
3460
3461 Klass* caller_k = java_lang_Class::as_Klass(JNIHandles::resolve(caller));
3462 InstanceKlass* caller_ik = InstanceKlass::cast(caller_k);
3463 if (!caller_ik->in_aot_cache()) {
3464 // there won't be a shared lambda class if the caller_ik is not in the shared archive.
3465 return nullptr;
3466 }
3467
3472 Handle interface_method_type_oop(THREAD, JNIHandles::resolve_non_null(interfaceMethodType));
3473 Symbol* interface_method_type = java_lang_invoke_MethodType::as_signature(interface_method_type_oop(), true);
3474
3475 Handle implementation_member_oop(THREAD, JNIHandles::resolve_non_null(implementationMember));
3476 assert(java_lang_invoke_MemberName::is_method(implementation_member_oop()), "must be");
3477 Method* m = java_lang_invoke_MemberName::vmtarget(implementation_member_oop());
3478
3479 Handle dynamic_method_type_oop(THREAD, JNIHandles::resolve_non_null(dynamicMethodType));
3480 Symbol* dynamic_method_type = java_lang_invoke_MethodType::as_signature(dynamic_method_type_oop(), true);
3481
3482 InstanceKlass* loaded_lambda =
3483 LambdaProxyClassDictionary::load_shared_lambda_proxy_class(caller_ik, interface_method_name, factory_type,
3484 interface_method_type, m, dynamic_method_type,
3485 CHECK_(nullptr));
3486 return loaded_lambda == nullptr ? nullptr : (jclass) JNIHandles::make_local(THREAD, loaded_lambda->java_mirror());
3487 #else
3488 return nullptr;
3489 #endif // INCLUDE_CDS
3490 JVM_END
3491
3492 JVM_ENTRY_NO_ENV_PROF(jlong, JVM_GetRandomSeedForDumping, JVM_GetRandomSeedForDumping())
3493 if (CDSConfig::is_dumping_static_archive()) {
3494 // We do this so that the default CDS archive can be deterministic.
3495 const char* release = VM_Version::vm_release();
3496 const char* dbg_level = VM_Version::jdk_debug_level();
3497 const char* version = VM_Version::internal_vm_info_string();
3498 jlong seed = (jlong)(java_lang_String::hash_code((const jbyte*)release, (int)strlen(release)) ^
3499 java_lang_String::hash_code((const jbyte*)dbg_level, (int)strlen(dbg_level)) ^
3500 java_lang_String::hash_code((const jbyte*)version, (int)strlen(version)));
3501 seed += (jlong)VM_Version::vm_major_version();
3502 seed += (jlong)VM_Version::vm_minor_version();
3503 seed += (jlong)VM_Version::vm_security_version();
3504 seed += (jlong)VM_Version::vm_patch_version();
3505 if (seed == 0) { // don't let this ever be zero.
3506 seed = 0x87654321;
3507 }
3508 log_debug(aot)("JVM_GetRandomSeedForDumping() = " JLONG_FORMAT, seed);
3509 return seed;
3510 } else {
3511 return 0;
3512 }
3513 JVM_END
3514
3515 JVM_ENTRY_NO_ENV_PROF(jint, JVM_GetCDSConfigStatus, JVM_GetCDSConfigStatus())
3516 return CDSConfig::get_status();
3517 JVM_END
3518
3519 JVM_ENTRY_PROF(void, JVM_LogLambdaFormInvoker, JVM_LogLambdaFormInvoker(JNIEnv *env, jstring line))
3520 #if INCLUDE_CDS
3521 assert(CDSConfig::is_logging_lambda_form_invokers(), "sanity");
3522 if (line != nullptr) {
3523 ResourceMark rm(THREAD);
3524 Handle h_line (THREAD, JNIHandles::resolve_non_null(line));
3525 char* c_line = java_lang_String::as_utf8_string(h_line());
3526 if (CDSConfig::is_dumping_dynamic_archive() || CDSConfig::is_dumping_preimage_static_archive()) {
3527 // Note: LambdaFormInvokers::append take same format which is not
3528 // same as below the print format. The line does not include LAMBDA_FORM_TAG.
3529 LambdaFormInvokers::append(os::strdup((const char*)c_line, mtInternal));
3530 }
3531 if (ClassListWriter::is_enabled()) {
3532 ClassListWriter w;
3533 w.stream()->print_cr("%s %s", ClassListParser::lambda_form_tag(), c_line);
3534 }
3535 }
3536 #endif // INCLUDE_CDS
3537 JVM_END
3538
3539 JVM_ENTRY_PROF(void, JVM_LogDynamicProxy, JVM_LogDynamicProxy(JNIEnv *env, jobject loader, jstring proxy_name, jobjectArray interfaces, jint access_flags))
3540 #if INCLUDE_CDS
3541 assert(CDSConfig::is_logging_dynamic_proxies(), "sanity");
3542
3543 ResourceMark rm(THREAD);
3544 oop proxy_name_oop = JNIHandles::resolve_non_null(proxy_name);
3545 char* proxy_name_str = java_lang_String::as_utf8_string(proxy_name_oop);
3546 oop loader_oop = JNIHandles::resolve(loader);
3547 objArrayOop interfaces_oop = objArrayOop(JNIHandles::resolve_non_null(interfaces));
3548
3549 AOTConstantPoolResolver::trace_dynamic_proxy_class(loader_oop, proxy_name_str, interfaces_oop, access_flags);
3550 #endif // INCLUDE_CDS
3551 JVM_END
3552
3553 JVM_ENTRY_PROF(void, JVM_DumpClassListToFile, JVM_DumpClassListToFile(JNIEnv *env, jstring listFileName))
3554 #if INCLUDE_CDS
3555 ResourceMark rm(THREAD);
3556 Handle file_handle(THREAD, JNIHandles::resolve_non_null(listFileName));
3557 char* file_name = java_lang_String::as_utf8_string(file_handle());
3558 AOTMetaspace::dump_loaded_classes(file_name, THREAD);
3559 #endif // INCLUDE_CDS
3560 JVM_END
3561
3562 JVM_ENTRY_PROF(void, JVM_DumpDynamicArchive, JVM_DumpDynamicArchive(JNIEnv *env, jstring archiveName))
3563 #if INCLUDE_CDS
3564 ResourceMark rm(THREAD);
3565 Handle file_handle(THREAD, JNIHandles::resolve_non_null(archiveName));
3566 char* archive_name = java_lang_String::as_utf8_string(file_handle());
3567 DynamicArchive::dump_for_jcmd(archive_name, CHECK);
3568 #endif // INCLUDE_CDS
3569 JVM_END
3570
3571 JVM_ENTRY(jboolean, JVM_NeedsClassInitBarrierForCDS(JNIEnv* env, jclass cls))
3572 #if INCLUDE_CDS
3573 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
3574 if (!k->is_instance_klass()) {
3575 return false;
3576 } else {
3577 if (InstanceKlass::cast(k)->is_enum_subclass() ||
3578 AOTClassInitializer::can_archive_initialized_mirror(InstanceKlass::cast(k))) {
3579 // This class will be cached in AOT-initialized state. No need for init barriers.
3580 return false;
3581 } else {
3582 // If we cannot cache the class in AOT-initialized state, java.lang.invoke handles
3583 // must emit barriers to ensure class initialization during production run.
3584 ResourceMark rm(THREAD);
3585 log_debug(aot)("NeedsClassInitBarrierForCDS: %s", k->external_name());
3586 return true;
3587 }
3588 }
3589 #else
3590 return false;
3591 #endif // INCLUDE_CDS
3592 JVM_END
3593
3594 // Returns an array of all live Thread objects (VM internal JavaThreads,
3595 // jvmti agent threads, and JNI attaching threads are skipped)
3596 // See CR 6404306 regarding JNI attaching threads
3597 JVM_ENTRY_PROF(jobjectArray, JVM_GetAllThreads, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
3598 ResourceMark rm(THREAD);
3599 ThreadsListEnumerator tle(THREAD, false, false);
3600 JvmtiVMObjectAllocEventCollector oam;
3601
3602 int num_threads = tle.num_threads();
3603 objArrayOop r = oopFactory::new_objArray(vmClasses::Thread_klass(), num_threads, CHECK_NULL);
3604 objArrayHandle threads_ah(THREAD, r);
3605
3606 for (int i = 0; i < num_threads; i++) {
3607 Handle h = tle.get_threadObj(i);
3608 threads_ah->obj_at_put(i, h());
3609 }
3610
3611 return (jobjectArray) JNIHandles::make_local(THREAD, threads_ah());
3612 JVM_END
3613
3614
3615 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
3616 // Return StackTraceElement[][], each element is the stack trace of a thread in
3617 // the corresponding entry in the given threads array
3618 JVM_ENTRY_PROF(jobjectArray, JVM_DumpThreads, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
3619 JvmtiVMObjectAllocEventCollector oam;
3620
3621 // Check if threads is null
3622 if (threads == nullptr) {
3623 THROW_NULL(vmSymbols::java_lang_NullPointerException());
3624 }
3625
3626 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
3627 objArrayHandle ah(THREAD, a);
3628 int num_threads = ah->length();
3629 // check if threads is non-empty array
3630 if (num_threads == 0) {
3631 THROW_NULL(vmSymbols::java_lang_IllegalArgumentException());
3632 }
3633
3634 // check if threads is not an array of objects of Thread class
3635 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
3636 if (k != vmClasses::Thread_klass()) {
3637 THROW_NULL(vmSymbols::java_lang_IllegalArgumentException());
3638 }
3639
3640 ResourceMark rm(THREAD);
3641
3642 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
3643 for (int i = 0; i < num_threads; i++) {
3644 oop thread_obj = ah->obj_at(i);
3645 instanceHandle h(THREAD, (instanceOop) thread_obj);
3646 thread_handle_array->append(h);
3647 }
3648
3649 // The JavaThread references in thread_handle_array are validated
3650 // in VM_ThreadDump::doit().
3651 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
3652 return (jobjectArray)JNIHandles::make_local(THREAD, stacktraces());
3653
3654 JVM_END
3655
3656 // JVM monitoring and management support
3657 JVM_LEAF_PROF(void*, JVM_GetManagement, JVM_GetManagement(jint version))
3658 return Management::get_jmm_interface(version);
3659 JVM_END
3660
3661 // com.sun.tools.attach.VirtualMachine agent properties support
3662 //
3663 // Initialize the agent properties with the properties maintained in the VM
3664 JVM_ENTRY_PROF(jobject, JVM_InitAgentProperties, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
3665 ResourceMark rm;
3666
3667 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
3668
3669 PUTPROP(props, "sun.java.command", Arguments::java_command());
3670 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
3671 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
3672 return properties;
3673 JVM_END
3674
3675 JVM_ENTRY_PROF(jobjectArray, JVM_GetEnclosingMethodInfo, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
3676 {
3677 JvmtiVMObjectAllocEventCollector oam;
3678
3679 if (ofClass == nullptr) {
3680 return nullptr;
3681 }
3682 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
3683 // Special handling for primitive objects
3684 if (java_lang_Class::is_primitive(mirror())) {
3685 return nullptr;
3686 }
3687 Klass* k = java_lang_Class::as_Klass(mirror());
3688 if (!k->is_instance_klass()) {
3689 return nullptr;
3690 }
3691 InstanceKlass* ik = InstanceKlass::cast(k);
3692 int encl_method_class_idx = ik->enclosing_method_class_index();
3693 if (encl_method_class_idx == 0) {
3694 return nullptr;
3695 }
3698 Klass* enc_k = ik->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
3699 dest->obj_at_put(0, enc_k->java_mirror());
3700 int encl_method_method_idx = ik->enclosing_method_method_index();
3701 if (encl_method_method_idx != 0) {
3702 Symbol* sym = ik->constants()->symbol_at(
3703 extract_low_short_from_int(
3704 ik->constants()->name_and_type_at(encl_method_method_idx)));
3705 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3706 dest->obj_at_put(1, str());
3707 sym = ik->constants()->symbol_at(
3708 extract_high_short_from_int(
3709 ik->constants()->name_and_type_at(encl_method_method_idx)));
3710 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3711 dest->obj_at_put(2, str());
3712 }
3713 return (jobjectArray) JNIHandles::make_local(THREAD, dest());
3714 }
3715 JVM_END
3716
3717 // Returns an array of java.lang.String objects containing the input arguments to the VM.
3718 JVM_ENTRY_PROF(jobjectArray, JVM_GetVmArguments, JVM_GetVmArguments(JNIEnv *env))
3719 ResourceMark rm(THREAD);
3720
3721 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) {
3722 return nullptr;
3723 }
3724
3725 char** vm_flags = Arguments::jvm_flags_array();
3726 char** vm_args = Arguments::jvm_args_array();
3727 int num_flags = Arguments::num_jvm_flags();
3728 int num_args = Arguments::num_jvm_args();
3729
3730 InstanceKlass* ik = vmClasses::String_klass();
3731 objArrayOop r = oopFactory::new_objArray(ik, num_args + num_flags, CHECK_NULL);
3732 objArrayHandle result_h(THREAD, r);
3733
3734 int index = 0;
3735 for (int j = 0; j < num_flags; j++, index++) {
3736 Handle h = java_lang_String::create_from_platform_dependent_str(vm_flags[j], CHECK_NULL);
3737 result_h->obj_at_put(index, h());
3738 }
3739 for (int i = 0; i < num_args; i++, index++) {
3740 Handle h = java_lang_String::create_from_platform_dependent_str(vm_args[i], CHECK_NULL);
3741 result_h->obj_at_put(index, h());
3742 }
3743 return (jobjectArray) JNIHandles::make_local(THREAD, result_h());
3744 JVM_END
3745
3746 JVM_LEAF_PROF(jint, JVM_FindSignal, JVM_FindSignal(const char *name))
3747 return os::get_signal_number(name);
3748 JVM_END
3749
3750 JVM_ENTRY_PROF(void, JVM_VirtualThreadStart, JVM_VirtualThreadStart(JNIEnv* env, jobject vthread))
3751 #if INCLUDE_JVMTI
3752 if (!DoJVMTIVirtualThreadTransitions) {
3753 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
3754 return;
3755 }
3756 if (JvmtiVTMSTransitionDisabler::VTMS_notify_jvmti_events()) {
3757 JvmtiVTMSTransitionDisabler::VTMS_vthread_start(vthread);
3758 } else {
3759 // set VTMS transition bit value in JavaThread and java.lang.VirtualThread object
3760 JvmtiVTMSTransitionDisabler::set_is_in_VTMS_transition(thread, vthread, false);
3761 }
3762 #endif
3763 JVM_END
3764
3765 JVM_ENTRY_PROF(void, JVM_VirtualThreadEnd, JVM_VirtualThreadEnd(JNIEnv* env, jobject vthread))
3766 #if INCLUDE_JVMTI
3767 if (!DoJVMTIVirtualThreadTransitions) {
3768 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
3769 return;
3770 }
3771 if (JvmtiVTMSTransitionDisabler::VTMS_notify_jvmti_events()) {
3772 JvmtiVTMSTransitionDisabler::VTMS_vthread_end(vthread);
3773 } else {
3774 // set VTMS transition bit value in JavaThread and java.lang.VirtualThread object
3775 JvmtiVTMSTransitionDisabler::set_is_in_VTMS_transition(thread, vthread, true);
3776 }
3777 #endif
3778 JVM_END
3779
3780 // If notifications are disabled then just update the VTMS transition bit and return.
3781 // Otherwise, the bit is updated in the given jvmtiVTMSTransitionDisabler function call.
3782 JVM_ENTRY_PROF(void, JVM_VirtualThreadMount, JVM_VirtualThreadMount(JNIEnv* env, jobject vthread, jboolean hide))
3783 #if INCLUDE_JVMTI
3784 if (!DoJVMTIVirtualThreadTransitions) {
3785 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
3786 return;
3787 }
3788 if (JvmtiVTMSTransitionDisabler::VTMS_notify_jvmti_events()) {
3789 JvmtiVTMSTransitionDisabler::VTMS_vthread_mount(vthread, hide);
3790 } else {
3791 // set VTMS transition bit value in JavaThread and java.lang.VirtualThread object
3792 JvmtiVTMSTransitionDisabler::set_is_in_VTMS_transition(thread, vthread, hide);
3793 }
3794 #endif
3795 JVM_END
3796
3797 // If notifications are disabled then just update the VTMS transition bit and return.
3798 // Otherwise, the bit is updated in the given jvmtiVTMSTransitionDisabler function call below.
3799 JVM_ENTRY_PROF(void, JVM_VirtualThreadUnmount, JVM_VirtualThreadUnmount(JNIEnv* env, jobject vthread, jboolean hide))
3800 #if INCLUDE_JVMTI
3801 if (!DoJVMTIVirtualThreadTransitions) {
3802 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
3803 return;
3804 }
3805 if (JvmtiVTMSTransitionDisabler::VTMS_notify_jvmti_events()) {
3806 JvmtiVTMSTransitionDisabler::VTMS_vthread_unmount(vthread, hide);
3807 } else {
3808 // set VTMS transition bit value in JavaThread and java.lang.VirtualThread object
3809 JvmtiVTMSTransitionDisabler::set_is_in_VTMS_transition(thread, vthread, hide);
3810 }
3811 #endif
3812 JVM_END
3813
3814 // Notification from VirtualThread about disabling JVMTI Suspend in a sync critical section.
3815 // Needed to avoid deadlocks with JVMTI suspend mechanism.
3816 JVM_ENTRY(void, JVM_VirtualThreadDisableSuspend(JNIEnv* env, jclass clazz, jboolean enter))
3817 #if INCLUDE_JVMTI
3818 if (!DoJVMTIVirtualThreadTransitions) {
3819 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
3846 OopHandle& list_head = ObjectMonitor::vthread_list_head();
3847 oop vthread_head = nullptr;
3848 while (true) {
3849 if (list_head.peek() != nullptr) {
3850 for (;;) {
3851 oop head = list_head.resolve();
3852 if (list_head.cmpxchg(head, nullptr) == head) {
3853 return JNIHandles::make_local(THREAD, head);
3854 }
3855 }
3856 }
3857 ThreadBlockInVM tbivm(THREAD);
3858 parkEvent->park();
3859 }
3860 JVM_END
3861 /*
3862 * Return the current class's class file version. The low order 16 bits of the
3863 * returned jint contain the class's major version. The high order 16 bits
3864 * contain the class's minor version.
3865 */
3866 JVM_ENTRY_PROF(jint, JVM_GetClassFileVersion, JVM_GetClassFileVersion(JNIEnv* env, jclass current))
3867 oop mirror = JNIHandles::resolve_non_null(current);
3868 if (java_lang_Class::is_primitive(mirror)) {
3869 // return latest major version and minor version of 0.
3870 return JVM_CLASSFILE_MAJOR_VERSION;
3871 }
3872 assert(!java_lang_Class::as_Klass(mirror)->is_array_klass(), "unexpected array class");
3873
3874 Klass* c = java_lang_Class::as_Klass(mirror);
3875 assert(c->is_instance_klass(), "must be");
3876 InstanceKlass* ik = InstanceKlass::cast(c);
3877 return (ik->minor_version() << 16) | ik->major_version();
3878 JVM_END
3879
3880 /*
3881 * Ensure that code doing a stackwalk and using javaVFrame::locals() to
3882 * get the value will see a materialized value and not a scalar-replaced
3883 * null value.
3884 */
3885 JVM_ENTRY_PROF(void, JVM_EnsureMaterializedForStackWalk_func, JVM_EnsureMaterializedForStackWalk_func(JNIEnv* env, jobject vthread, jobject value))
3886 JVM_EnsureMaterializedForStackWalk(env, value);
3887 JVM_END
3888
3889 /*
3890 * Return JNI_TRUE if warnings are printed when agents are dynamically loaded.
3891 */
3892 JVM_LEAF_PROF(jboolean, JVM_PrintWarningAtDynamicAgentLoad, JVM_PrintWarningAtDynamicAgentLoad(void))
3893 return (EnableDynamicAgentLoading && !FLAG_IS_CMDLINE(EnableDynamicAgentLoading)) ? JNI_TRUE : JNI_FALSE;
3894 JVM_END
3895
3896 #define DO_COUNTERS(macro) \
3897 macro(JVM_CurrentTimeMillis) \
3898 macro(JVM_NanoTime) \
3899 macro(JVM_GetNanoTimeAdjustment) \
3900 macro(JVM_ArrayCopy) \
3901 macro(JVM_GetProperties) \
3902 macro(JVM_GetTemporaryDirectory) \
3903 macro(JVM_BeforeHalt) \
3904 macro(JVM_Halt) \
3905 macro(JVM_GC) \
3906 macro(JVM_MaxObjectInspectionAge) \
3907 macro(JVM_TotalMemory) \
3908 macro(JVM_FreeMemory) \
3909 macro(JVM_MaxMemory) \
3910 macro(JVM_ActiveProcessorCount) \
3911 macro(JVM_IsUseContainerSupport) \
3912 macro(JVM_FillInStackTrace) \
3913 macro(JVM_GetExtendedNPEMessage) \
3914 macro(JVM_InitStackTraceElementArray) \
3915 macro(JVM_InitStackTraceElement) \
3916 macro(JVM_ExpandStackFrameInfo) \
3917 macro(JVM_CallStackWalk) \
3918 macro(JVM_MoreStackWalk) \
3919 macro(JVM_SetStackWalkContinuation) \
3920 macro(JVM_IHashCode) \
3921 macro(JVM_MonitorWait) \
3922 macro(JVM_MonitorNotify) \
3923 macro(JVM_MonitorNotifyAll) \
3924 macro(JVM_Clone) \
3925 macro(JVM_ReportFinalizationComplete) \
3926 macro(JVM_IsFinalizationEnabled) \
3927 macro(JVM_RegisterContinuationMethods) \
3928 macro(JVM_NativePath) \
3929 macro(JVM_GetCallerClass) \
3930 macro(JVM_FindPrimitiveClass) \
3931 macro(JVM_FindClassFromBootLoader) \
3932 macro(JVM_FindClassFromCaller) \
3933 macro(JVM_FindClassFromClass) \
3934 macro(JVM_DefineClass) \
3935 macro(JVM_LookupDefineClass) \
3936 macro(JVM_DefineClassWithSource) \
3937 macro(JVM_FindLoadedClass) \
3938 macro(JVM_DefineModule) \
3939 macro(JVM_SetBootLoaderUnnamedModule) \
3940 macro(JVM_AddModuleExports) \
3941 macro(JVM_AddModuleExportsToAllUnnamed) \
3942 macro(JVM_AddModuleExportsToAll) \
3943 macro(JVM_AddReadsModule) \
3944 macro(JVM_DefineArchivedModules) \
3945 macro(JVM_InitClassName) \
3946 macro(JVM_GetClassInterfaces) \
3947 macro(JVM_IsInterface) \
3948 macro(JVM_IsHiddenClass) \
3949 macro(JVM_FindScopedValueBindings) \
3950 macro(JVM_GetDeclaredClasses) \
3951 macro(JVM_GetDeclaringClass) \
3952 macro(JVM_GetSimpleBinaryName) \
3953 macro(JVM_GetClassSignature) \
3954 macro(JVM_GetClassAnnotations) \
3955 macro(JVM_GetClassTypeAnnotations) \
3956 macro(JVM_GetMethodTypeAnnotations) \
3957 macro(JVM_GetFieldTypeAnnotations) \
3958 macro(JVM_GetMethodParameters) \
3959 macro(JVM_GetClassDeclaredFields) \
3960 macro(JVM_IsRecord) \
3961 macro(JVM_GetRecordComponents) \
3962 macro(JVM_GetClassDeclaredMethods) \
3963 macro(JVM_GetClassDeclaredConstructors) \
3964 macro(JVM_AreNestMates) \
3965 macro(JVM_GetNestHost) \
3966 macro(JVM_GetNestMembers) \
3967 macro(JVM_GetPermittedSubclasses) \
3968 macro(JVM_GetClassConstantPool) \
3969 macro(JVM_ConstantPoolGetSize) \
3970 macro(JVM_ConstantPoolGetClassAt) \
3971 macro(JVM_ConstantPoolGetClassAtIfLoaded) \
3972 macro(JVM_ConstantPoolGetMethodAt) \
3973 macro(JVM_ConstantPoolGetMethodAtIfLoaded) \
3974 macro(JVM_ConstantPoolGetFieldAt) \
3975 macro(JVM_ConstantPoolGetFieldAtIfLoaded) \
3976 macro(JVM_ConstantPoolGetMemberRefInfoAt) \
3977 macro(JVM_ConstantPoolGetClassRefIndexAt) \
3978 macro(JVM_ConstantPoolGetNameAndTypeRefIndexAt) \
3979 macro(JVM_ConstantPoolGetNameAndTypeRefInfoAt) \
3980 macro(JVM_ConstantPoolGetIntAt) \
3981 macro(JVM_ConstantPoolGetLongAt) \
3982 macro(JVM_ConstantPoolGetFloatAt) \
3983 macro(JVM_ConstantPoolGetDoubleAt) \
3984 macro(JVM_ConstantPoolGetStringAt) \
3985 macro(JVM_ConstantPoolGetUTF8At) \
3986 macro(JVM_ConstantPoolGetTagAt) \
3987 macro(JVM_DesiredAssertionStatus) \
3988 macro(JVM_AssertionStatusDirectives) \
3989 macro(JVM_GetClassNameUTF) \
3990 macro(JVM_GetClassCPTypes) \
3991 macro(JVM_GetClassCPEntriesCount) \
3992 macro(JVM_GetClassFieldsCount) \
3993 macro(JVM_GetClassMethodsCount) \
3994 macro(JVM_GetMethodIxExceptionIndexes) \
3995 macro(JVM_GetMethodIxExceptionsCount) \
3996 macro(JVM_GetMethodIxByteCode) \
3997 macro(JVM_GetMethodIxByteCodeLength) \
3998 macro(JVM_GetMethodIxExceptionTableEntry) \
3999 macro(JVM_GetMethodIxExceptionTableLength) \
4000 macro(JVM_GetMethodIxModifiers) \
4001 macro(JVM_GetFieldIxModifiers) \
4002 macro(JVM_GetMethodIxLocalsCount) \
4003 macro(JVM_GetMethodIxArgsSize) \
4004 macro(JVM_GetMethodIxMaxStack) \
4005 macro(JVM_IsConstructorIx) \
4006 macro(JVM_IsVMGeneratedMethodIx) \
4007 macro(JVM_GetMethodIxNameUTF) \
4008 macro(JVM_GetMethodIxSignatureUTF) \
4009 macro(JVM_GetCPFieldNameUTF) \
4010 macro(JVM_GetCPMethodNameUTF) \
4011 macro(JVM_GetCPMethodSignatureUTF) \
4012 macro(JVM_GetCPFieldSignatureUTF) \
4013 macro(JVM_GetCPClassNameUTF) \
4014 macro(JVM_GetCPFieldClassNameUTF) \
4015 macro(JVM_GetCPMethodClassNameUTF) \
4016 macro(JVM_GetCPFieldModifiers) \
4017 macro(JVM_GetCPMethodModifiers) \
4018 macro(JVM_ReleaseUTF) \
4019 macro(JVM_IsSameClassPackage) \
4020 macro(JVM_StartThread) \
4021 macro(JVM_SetThreadPriority) \
4022 macro(JVM_Yield) \
4023 macro(JVM_SleepNanos) \
4024 macro(JVM_CurrentCarrierThread) \
4025 macro(JVM_CurrentThread) \
4026 macro(JVM_SetCurrentThread) \
4027 macro(JVM_GetNextThreadIdOffset) \
4028 macro(JVM_Interrupt) \
4029 macro(JVM_HoldsLock) \
4030 macro(JVM_GetStackTrace) \
4031 macro(JVM_CreateThreadSnapshot) \
4032 macro(JVM_SetNativeThreadName) \
4033 macro(JVM_ScopedValueCache) \
4034 macro(JVM_SetScopedValueCache) \
4035 macro(JVM_GetSystemPackage) \
4036 macro(JVM_GetSystemPackages) \
4037 macro(JVM_GetAndClearReferencePendingList) \
4038 macro(JVM_HasReferencePendingList) \
4039 macro(JVM_WaitForReferencePendingList) \
4040 macro(JVM_ReferenceGet) \
4041 macro(JVM_ReferenceRefersTo) \
4042 macro(JVM_ReferenceClear) \
4043 macro(JVM_PhantomReferenceRefersTo) \
4044 macro(JVM_LatestUserDefinedLoader) \
4045 macro(JVM_GetArrayLength) \
4046 macro(JVM_GetArrayElement) \
4047 macro(JVM_GetPrimitiveArrayElement) \
4048 macro(JVM_SetArrayElement) \
4049 macro(JVM_SetPrimitiveArrayElement) \
4050 macro(JVM_NewArray) \
4051 macro(JVM_NewMultiArray) \
4052 macro(JVM_LoadZipLibrary) \
4053 macro(JVM_LoadLibrary) \
4054 macro(JVM_UnloadLibrary) \
4055 macro(JVM_FindLibraryEntry) \
4056 macro(JVM_IsSupportedJNIVersion) \
4057 macro(JVM_IsPreviewEnabled) \
4058 macro(JVM_IsContinuationsSupported) \
4059 macro(JVM_IsForeignLinkerSupported) \
4060 macro(JVM_InternString) \
4061 macro(JVM_InvokeMethod) \
4062 macro(JVM_NewInstanceFromConstructor) \
4063 macro(JVM_InitializeFromArchive) \
4064 macro(JVM_RegisterLambdaProxyClassForArchiving) \
4065 macro(JVM_LookupLambdaProxyClassFromArchive) \
4066 macro(JVM_GetRandomSeedForDumping) \
4067 macro(JVM_LogLambdaFormInvoker) \
4068 macro(JVM_LogDynamicProxy) \
4069 macro(JVM_DumpClassListToFile) \
4070 macro(JVM_DumpDynamicArchive) \
4071 macro(JVM_GetAllThreads) \
4072 macro(JVM_DumpThreads) \
4073 macro(JVM_GetManagement) \
4074 macro(JVM_InitAgentProperties) \
4075 macro(JVM_GetEnclosingMethodInfo) \
4076 macro(JVM_GetVmArguments) \
4077 macro(JVM_FindSignal) \
4078 macro(JVM_VirtualThreadStart) \
4079 macro(JVM_VirtualThreadEnd) \
4080 macro(JVM_VirtualThreadMount) \
4081 macro(JVM_VirtualThreadUnmount) \
4082 macro(JVM_GetClassFileVersion) \
4083 macro(JVM_EnsureMaterializedForStackWalk_func) \
4084 macro(JVM_PrintWarningAtDynamicAgentLoad)
4085
4086 #define INIT_COUNTER(name) \
4087 NEWPERFTICKCOUNTERS(_perf_##name##_timer, SUN_RT, #name); \
4088 NEWPERFEVENTCOUNTER(_perf_##name##_count, SUN_RT, #name "_count"); \
4089
4090 void perf_jvm_init() {
4091 if (ProfileVMCalls && UsePerfData) {
4092 EXCEPTION_MARK;
4093
4094 DO_COUNTERS(INIT_COUNTER)
4095
4096 if (HAS_PENDING_EXCEPTION) {
4097 vm_exit_during_initialization("jvm_perf_init failed unexpectedly");
4098 }
4099 }
4100 }
4101
4102 #undef INIT_COUNTER
4103
4104 #define PRINT_COUNTER(name) {\
4105 jlong count = _perf_##name##_count->get_value(); \
4106 if (count > 0) { \
4107 st->print_cr(" %-40s = " JLONG_FORMAT_W(6) "us (elapsed) " JLONG_FORMAT_W(6) "us (thread) (" JLONG_FORMAT_W(5) " events)", \
4108 #name, \
4109 _perf_##name##_timer->elapsed_counter_value_us(), \
4110 _perf_##name##_timer->thread_counter_value_us(), count); \
4111 }}
4112
4113 void perf_jvm_print_on(outputStream* st) {
4114 if (ProfileVMCalls && UsePerfData) {
4115 DO_COUNTERS(PRINT_COUNTER)
4116 } else {
4117 st->print_cr(" JVM: no info (%s is disabled)", (UsePerfData ? "ProfileVMCalls" : "UsePerfData"));
4118 }
4119 }
4120
4121 #undef PRINT_COUNTER
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