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"
70 #include "prims/jvmtiExport.hpp"
71 #include "prims/jvmtiThreadState.inline.hpp"
72 #include "prims/stackwalk.hpp"
73 #include "runtime/arguments.hpp"
74 #include "runtime/atomicAccess.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/mountUnmountDisabler.hpp"
88 #include "runtime/os.inline.hpp"
89 #include "runtime/osThread.hpp"
90 #include "runtime/perfData.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"
223 }
224 }
225 }
226
227 // java.lang.System //////////////////////////////////////////////////////////////////////
228
229 JVM_ENTRY(jboolean, JVM_AOTEndRecording(JNIEnv *env))
230 #if INCLUDE_CDS
231 if (CDSConfig::is_dumping_preimage_static_archive()) {
232 if (!AOTMetaspace::preimage_static_archive_dumped()) {
233 AOTMetaspace::dump_static_archive(THREAD);
234 return JNI_TRUE;
235 }
236 }
237 return JNI_FALSE;
238 #else
239 return JNI_FALSE;
240 #endif // INCLUDE_CDS
241 JVM_END
242
243 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
244 return os::javaTimeMillis();
245 JVM_END
246
247 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored))
248 return os::javaTimeNanos();
249 JVM_END
250
251 // The function below is actually exposed by jdk.internal.misc.VM and not
252 // java.lang.System, but we choose to keep it here so that it stays next
253 // to JVM_CurrentTimeMillis and JVM_NanoTime
254
255 const jlong MAX_DIFF_SECS = CONST64(0x0100000000); // 2^32
256 const jlong MIN_DIFF_SECS = -MAX_DIFF_SECS; // -2^32
257
258 JVM_LEAF(jlong, JVM_GetNanoTimeAdjustment(JNIEnv *env, jclass ignored, jlong offset_secs))
259 jlong seconds;
260 jlong nanos;
261
262 os::javaTimeSystemUTC(seconds, nanos);
263
264 // We're going to verify that the result can fit in a long.
265 // For that we need the difference in seconds between 'seconds'
266 // and 'offset_secs' to be such that:
267 // |seconds - offset_secs| < (2^63/10^9)
268 // We're going to approximate 10^9 ~< 2^30 (1000^3 ~< 1024^3)
269 // which makes |seconds - offset_secs| < 2^33
270 // and we will prefer +/- 2^32 as the maximum acceptable diff
271 // as 2^32 has a more natural feel than 2^33...
272 //
273 // So if |seconds - offset_secs| >= 2^32 - we return a special
274 // sentinel value (-1) which the caller should take as an
275 // exception value indicating that the offset given to us is
276 // too far from range of the current time - leading to too big
277 // a nano adjustment. The caller is expected to recover by
278 // computing a more accurate offset and calling this method
279 // again. (For the record 2^32 secs is ~136 years, so that
280 // should rarely happen)
281 //
282 jlong diff = seconds - offset_secs;
283 if (diff >= MAX_DIFF_SECS || diff <= MIN_DIFF_SECS) {
284 return -1; // sentinel value: the offset is too far off the target
285 }
286
287 // return the adjustment. If you compute a time by adding
288 // this number of nanoseconds along with the number of seconds
289 // in the offset you should get the current UTC time.
290 return (diff * (jlong)1000000000) + nanos;
291 JVM_END
292
293 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
294 jobject dst, jint dst_pos, jint length))
295 // Check if we have null pointers
296 if (src == nullptr || dst == nullptr) {
297 THROW(vmSymbols::java_lang_NullPointerException());
298 }
299 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
300 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
301 assert(oopDesc::is_oop(s), "JVM_ArrayCopy: src not an oop");
302 assert(oopDesc::is_oop(d), "JVM_ArrayCopy: dst not an oop");
303 // Do copy
304 s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread);
305 JVM_END
306
307
308 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
309 JavaValue r(T_OBJECT);
310 // public synchronized Object put(Object key, Object value);
311 HandleMark hm(THREAD);
312 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK);
313 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != nullptr ? value : ""), CHECK);
314 JavaCalls::call_virtual(&r,
315 props,
316 vmClasses::Properties_klass(),
317 vmSymbols::put_name(),
318 vmSymbols::object_object_object_signature(),
319 key_str,
320 value_str,
321 THREAD);
322 }
323
324
325 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
326
327 /*
328 * Return all of the system properties in a Java String array with alternating
329 * names and values from the jvm SystemProperty.
330 * Which includes some internal and all commandline -D defined properties.
331 */
332 JVM_ENTRY(jobjectArray, JVM_GetProperties(JNIEnv *env))
333 ResourceMark rm(THREAD);
334 HandleMark hm(THREAD);
335 int ndx = 0;
336 int fixedCount = 2;
337
338 SystemProperty* p = Arguments::system_properties();
339 int count = Arguments::PropertyList_count(p);
340
341 // Allocate result String array
342 InstanceKlass* ik = vmClasses::String_klass();
343 objArrayOop r = oopFactory::new_objArray(ik, (count + fixedCount) * 2, CHECK_NULL);
344 objArrayHandle result_h(THREAD, r);
345
346 while (p != nullptr) {
347 const char * key = p->key();
348 if (strcmp(key, "sun.nio.MaxDirectMemorySize") != 0) {
349 const char * value = p->value();
350 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK_NULL);
351 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != nullptr ? value : ""), CHECK_NULL);
352 result_h->obj_at_put(ndx * 2, key_str());
400 Handle key_str = java_lang_String::create_from_platform_dependent_str("sun.management.compiler", CHECK_NULL);
401 Handle value_str = java_lang_String::create_from_platform_dependent_str(compiler_name, CHECK_NULL);
402 result_h->obj_at_put(ndx * 2, key_str());
403 result_h->obj_at_put(ndx * 2 + 1, value_str());
404 ndx++;
405 }
406 }
407
408 return (jobjectArray) JNIHandles::make_local(THREAD, result_h());
409 JVM_END
410
411
412 /*
413 * Return the temporary directory that the VM uses for the attach
414 * and perf data files.
415 *
416 * It is important that this directory is well-known and the
417 * same for all VM instances. It cannot be affected by configuration
418 * variables such as java.io.tmpdir.
419 */
420 JVM_ENTRY(jstring, JVM_GetTemporaryDirectory(JNIEnv *env))
421 HandleMark hm(THREAD);
422 const char* temp_dir = os::get_temp_directory();
423 Handle h = java_lang_String::create_from_platform_dependent_str(temp_dir, CHECK_NULL);
424 return (jstring) JNIHandles::make_local(THREAD, h());
425 JVM_END
426
427
428 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
429
430 extern volatile jint vm_created;
431
432 JVM_ENTRY_NO_ENV(void, JVM_BeforeHalt())
433 EventShutdown event;
434 if (event.should_commit()) {
435 event.set_reason("Shutdown requested from Java");
436 event.commit();
437 }
438 JVM_END
439
440
441 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code))
442 before_exit(thread, true);
443 vm_exit(code);
444 JVM_END
445
446
447 JVM_ENTRY_NO_ENV(void, JVM_GC(void))
448 if (!DisableExplicitGC) {
449 EventSystemGC event;
450 event.set_invokedConcurrent(ExplicitGCInvokesConcurrent);
451 Universe::heap()->collect(GCCause::_java_lang_system_gc);
452 event.commit();
453 }
454 JVM_END
455
456
457 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void))
458 return Universe::heap()->millis_since_last_whole_heap_examined();
459 JVM_END
460
461
462 static inline jlong convert_size_t_to_jlong(size_t val) {
463 // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
464 NOT_LP64 (return (jlong)val;)
465 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
466 }
467
468 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void))
469 size_t n = Universe::heap()->capacity();
470 return convert_size_t_to_jlong(n);
471 JVM_END
472
473
474 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void))
475 size_t n = Universe::heap()->unused();
476 return convert_size_t_to_jlong(n);
477 JVM_END
478
479
480 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void))
481 size_t n = Universe::heap()->max_capacity();
482 return convert_size_t_to_jlong(n);
483 JVM_END
484
485
486 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void))
487 return os::active_processor_count();
488 JVM_END
489
490 JVM_LEAF(jboolean, JVM_IsUseContainerSupport(void))
491 #ifdef LINUX
492 if (UseContainerSupport) {
493 return JNI_TRUE;
494 }
495 #endif
496 return JNI_FALSE;
497 JVM_END
498
499 JVM_LEAF(jboolean, JVM_IsContainerized(void))
500 if (os::is_containerized()) {
501 return JNI_TRUE;
502 }
503 return JNI_FALSE;
504 JVM_END
505
506 // java.lang.Throwable //////////////////////////////////////////////////////
507
508 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
509 Handle exception(thread, JNIHandles::resolve_non_null(receiver));
510 java_lang_Throwable::fill_in_stack_trace(exception);
511 JVM_END
512
513 // java.lang.NullPointerException ///////////////////////////////////////////
514
515 JVM_ENTRY(jstring, JVM_GetExtendedNPEMessage(JNIEnv *env, jthrowable throwable))
516 if (!ShowCodeDetailsInExceptionMessages) return nullptr;
517
518 oop exc = JNIHandles::resolve_non_null(throwable);
519
520 Method* method;
521 int bci;
522 if (!java_lang_Throwable::get_top_method_and_bci(exc, &method, &bci)) {
523 return nullptr;
524 }
525 if (method->is_native()) {
526 return nullptr;
527 }
528
529 stringStream ss;
530 bool ok = BytecodeUtils::get_NPE_message_at(&ss, method, bci);
531 if (ok) {
532 oop result = java_lang_String::create_oop_from_str(ss.base(), CHECK_NULL);
533 return (jstring) JNIHandles::make_local(THREAD, result);
534 } else {
535 return nullptr;
536 }
537 JVM_END
538
539 // java.lang.StackTraceElement //////////////////////////////////////////////
540
541
542 JVM_ENTRY(void, JVM_InitStackTraceElementArray(JNIEnv *env, jobjectArray elements, jobject backtrace, jint depth))
543 Handle backtraceh(THREAD, JNIHandles::resolve(backtrace));
544 objArrayOop st = objArrayOop(JNIHandles::resolve(elements));
545 objArrayHandle stack_trace(THREAD, st);
546 // Fill in the allocated stack trace
547 java_lang_Throwable::get_stack_trace_elements(depth, backtraceh, stack_trace, CHECK);
548 JVM_END
549
550
551 JVM_ENTRY(void, JVM_InitStackTraceElement(JNIEnv* env, jobject element, jobject stackFrameInfo))
552 Handle stack_frame_info(THREAD, JNIHandles::resolve_non_null(stackFrameInfo));
553 Handle stack_trace_element(THREAD, JNIHandles::resolve_non_null(element));
554 java_lang_StackFrameInfo::to_stack_trace_element(stack_frame_info, stack_trace_element, CHECK);
555 JVM_END
556
557
558 // java.lang.StackWalker //////////////////////////////////////////////////////
559 JVM_ENTRY(void, JVM_ExpandStackFrameInfo(JNIEnv *env, jobject obj))
560 Handle stack_frame_info(THREAD, JNIHandles::resolve_non_null(obj));
561
562 bool have_name = (java_lang_StackFrameInfo::name(stack_frame_info()) != nullptr);
563 bool have_type = (java_lang_StackFrameInfo::type(stack_frame_info()) != nullptr);
564 Method* method = java_lang_StackFrameInfo::get_method(stack_frame_info());
565 if (!have_name) {
566 oop name = StringTable::intern(method->name(), CHECK);
567 java_lang_StackFrameInfo::set_name(stack_frame_info(), name);
568 }
569 if (!have_type) {
570 Handle type = java_lang_String::create_from_symbol(method->signature(), CHECK);
571 java_lang_StackFrameInfo::set_type(stack_frame_info(), type());
572 }
573 JVM_END
574
575 JVM_ENTRY(jobject, JVM_CallStackWalk(JNIEnv *env, jobject stackStream, jint mode,
576 jint skip_frames, jobject contScope, jobject cont,
577 jint buffer_size, jint start_index, jobjectArray frames))
578 if (!thread->has_last_Java_frame()) {
579 THROW_MSG_(vmSymbols::java_lang_InternalError(), "doStackWalk: no stack trace", nullptr);
580 }
581
582 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
583 Handle contScope_h(THREAD, JNIHandles::resolve(contScope));
584 Handle cont_h(THREAD, JNIHandles::resolve(cont));
585 // frames array is a ClassFrameInfo[] array when only getting caller reference,
586 // and a StackFrameInfo[] array (or derivative) otherwise. It should never
587 // be null.
588 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
589 objArrayHandle frames_array_h(THREAD, fa);
590
591 if (frames_array_h->length() < buffer_size) {
592 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers", nullptr);
593 }
594
595 oop result = StackWalk::walk(stackStream_h, mode, skip_frames, contScope_h, cont_h,
596 buffer_size, start_index, frames_array_h, CHECK_NULL);
597 return JNIHandles::make_local(THREAD, result);
598 JVM_END
599
600
601 JVM_ENTRY(jint, JVM_MoreStackWalk(JNIEnv *env, jobject stackStream, jint mode, jlong anchor,
602 jint last_batch_count, jint buffer_size, jint start_index,
603 jobjectArray frames))
604 // frames array is a ClassFrameInfo[] array when only getting caller reference,
605 // and a StackFrameInfo[] array (or derivative) otherwise. It should never
606 // be null.
607 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
608 objArrayHandle frames_array_h(THREAD, fa);
609
610 if (frames_array_h->length() < buffer_size) {
611 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers");
612 }
613
614 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
615 return StackWalk::fetchNextBatch(stackStream_h, mode, anchor, last_batch_count, buffer_size,
616 start_index, frames_array_h, THREAD);
617 JVM_END
618
619 JVM_ENTRY(void, JVM_SetStackWalkContinuation(JNIEnv *env, jobject stackStream, jlong anchor, jobjectArray frames, jobject cont))
620 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
621 objArrayHandle frames_array_h(THREAD, fa);
622 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
623 Handle cont_h(THREAD, JNIHandles::resolve_non_null(cont));
624
625 StackWalk::setContinuation(stackStream_h, anchor, frames_array_h, cont_h, THREAD);
626 JVM_END
627
628 // java.lang.Object ///////////////////////////////////////////////
629
630
631 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle))
632 // as implemented in the classic virtual machine; return 0 if object is null
633 return handle == nullptr ? 0 :
634 checked_cast<jint>(ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)));
635 JVM_END
636
637
638 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
639 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
640 ObjectSynchronizer::wait(obj, ms, CHECK);
641 JVM_END
642
643
644 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
645 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
646 ObjectSynchronizer::notify(obj, CHECK);
647 JVM_END
648
649
650 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
651 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
652 ObjectSynchronizer::notifyall(obj, CHECK);
653 JVM_END
654
655
656 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle))
657 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
658 Klass* klass = obj->klass();
659 JvmtiVMObjectAllocEventCollector oam;
660
661 #ifdef ASSERT
662 // Just checking that the cloneable flag is set correct
663 if (obj->is_array()) {
664 guarantee(klass->is_cloneable(), "all arrays are cloneable");
665 } else {
666 guarantee(obj->is_instance(), "should be instanceOop");
667 bool cloneable = klass->is_subtype_of(vmClasses::Cloneable_klass());
668 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
669 }
670 #endif
671
672 // Check if class of obj supports the Cloneable interface.
673 // All arrays are considered to be cloneable (See JLS 20.1.5).
674 // All j.l.r.Reference classes are considered non-cloneable.
675 if (!klass->is_cloneable() ||
676 (klass->is_instance_klass() &&
689 } else {
690 new_obj_oop = Universe::heap()->obj_allocate(klass, size, CHECK_NULL);
691 }
692
693 HeapAccess<>::clone(obj(), new_obj_oop, size);
694
695 Handle new_obj(THREAD, new_obj_oop);
696 // Caution: this involves a java upcall, so the clone should be
697 // "gc-robust" by this stage.
698 if (klass->has_finalizer()) {
699 assert(obj->is_instance(), "should be instanceOop");
700 new_obj_oop = InstanceKlass::register_finalizer(instanceOop(new_obj()), CHECK_NULL);
701 new_obj = Handle(THREAD, new_obj_oop);
702 }
703
704 return JNIHandles::make_local(THREAD, new_obj());
705 JVM_END
706
707 // java.lang.ref.Finalizer ////////////////////////////////////////////////////
708
709 JVM_ENTRY(void, JVM_ReportFinalizationComplete(JNIEnv * env, jobject finalizee))
710 MANAGEMENT_ONLY(FinalizerService::on_complete(JNIHandles::resolve_non_null(finalizee), THREAD);)
711 JVM_END
712
713 JVM_LEAF(jboolean, JVM_IsFinalizationEnabled(JNIEnv * env))
714 return InstanceKlass::is_finalization_enabled();
715 JVM_END
716
717 // jdk.internal.vm.Continuation /////////////////////////////////////////////////////
718
719 JVM_ENTRY(void, JVM_RegisterContinuationMethods(JNIEnv *env, jclass cls))
720 CONT_RegisterNativeMethods(env, cls);
721 JVM_END
722
723 // java.io.File ///////////////////////////////////////////////////////////////
724
725 JVM_LEAF(char*, JVM_NativePath(char* path))
726 return os::native_path(path);
727 JVM_END
728
729
730 // Misc. class handling ///////////////////////////////////////////////////////////
731
732
733 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env))
734 // Getting the class of the caller frame.
735 //
736 // The call stack at this point looks something like this:
737 //
738 // [0] [ @CallerSensitive public jdk.internal.reflect.Reflection.getCallerClass ]
739 // [1] [ @CallerSensitive API.method ]
740 // [.] [ (skipped intermediate frames) ]
741 // [n] [ caller ]
742 vframeStream vfst(thread);
743 // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass
744 for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) {
745 Method* m = vfst.method();
746 assert(m != nullptr, "sanity");
747 switch (n) {
748 case 0:
749 // This must only be called from Reflection.getCallerClass
750 if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) {
751 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass");
752 }
753 // fall-through
754 case 1:
755 // Frame 0 and 1 must be caller sensitive.
756 if (!m->caller_sensitive()) {
757 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n));
758 }
759 break;
760 default:
761 if (!m->is_ignored_by_security_stack_walk()) {
762 // We have reached the desired frame; return the holder class.
763 return (jclass) JNIHandles::make_local(THREAD, m->method_holder()->java_mirror());
764 }
765 break;
766 }
767 }
768 return nullptr;
769 JVM_END
770
771
772 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
773 oop mirror = nullptr;
774 BasicType t = name2type(utf);
775 if (t != T_ILLEGAL && !is_reference_type(t)) {
776 mirror = Universe::java_mirror(t);
777 }
778 if (mirror == nullptr) {
779 THROW_MSG_NULL(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
780 } else {
781 return (jclass) JNIHandles::make_local(THREAD, mirror);
782 }
783 JVM_END
784
785
786 // Returns a class loaded by the bootstrap class loader; or null
787 // if not found. ClassNotFoundException is not thrown.
788 // FindClassFromBootLoader is exported to the launcher for windows.
789 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
790 const char* name))
791 // Java libraries should ensure that name is never null or illegal.
792 if (name == nullptr || (int)strlen(name) > Symbol::max_length()) {
793 // It's impossible to create this class; the name cannot fit
794 // into the constant pool.
795 return nullptr;
796 }
797 assert(UTF8::is_legal_utf8((const unsigned char*)name, strlen(name), false), "illegal UTF name");
798
799 TempNewSymbol h_name = SymbolTable::new_symbol(name);
800 Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
801 if (k == nullptr) {
802 return nullptr;
803 }
804
805 if (log_is_enabled(Debug, class, resolve)) {
806 trace_class_resolution(k);
807 }
808 return (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
809 JVM_END
810
811 // Find a class with this name in this loader.
812 JVM_ENTRY(jclass, JVM_FindClassFromLoader(JNIEnv* env, const char* name,
813 jboolean init, jobject loader))
814 TempNewSymbol h_name =
815 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_ClassNotFoundException(),
816 CHECK_NULL);
817
818 oop loader_oop = JNIHandles::resolve(loader);
819 Handle h_loader(THREAD, loader_oop);
820
821 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
822 false, THREAD);
823
824 if (log_is_enabled(Debug, class, resolve) && result != nullptr) {
825 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
826 }
827 return result;
828 JVM_END
829
830 // Currently only called from the old verifier.
831 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
832 jboolean init, jclass from))
833 TempNewSymbol h_name =
834 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_ClassNotFoundException(),
835 CHECK_NULL);
836 oop from_class_oop = JNIHandles::resolve(from);
837 assert(from_class_oop != nullptr, "must be");
838 Klass* from_class = java_lang_Class::as_Klass(from_class_oop);
839 assert(from_class != nullptr, "must be");
840 oop class_loader = from_class->class_loader();
841
842 Handle h_loader(THREAD, class_loader);
843 jclass result = find_class_from_class_loader(env, h_name, init, h_loader, true, thread);
844
845 if (log_is_enabled(Debug, class, resolve) && result != nullptr) {
846 // this function is generally only used for class loading during verification.
847 ResourceMark rm;
848 const char* from_name = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(from))->external_name();
849 const char* to_name = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))->external_name();
850 log_debug(class, resolve)("%s %s (verification)", from_name, to_name);
851 }
852
1011 ik->external_name(),
1012 host_class->external_name(),
1013 ik->is_hidden() ? "is hidden" : "is not hidden");
1014 }
1015 }
1016
1017 if ((!is_hidden || is_nestmate) && !Reflection::is_same_class_package(lookup_k, ik)) {
1018 // non-hidden class or nestmate class must be in the same package as the Lookup class
1019 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Lookup class and defined class are in different packages");
1020 }
1021
1022 if (init) {
1023 ik->initialize(CHECK_NULL);
1024 } else {
1025 ik->link_class(CHECK_NULL);
1026 }
1027
1028 return (jclass) JNIHandles::make_local(THREAD, ik->java_mirror());
1029 }
1030
1031 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
1032 return jvm_define_class_common(name, loader, buf, len, pd, nullptr, THREAD);
1033 JVM_END
1034
1035 /*
1036 * Define a class with the specified lookup class.
1037 * lookup: Lookup class
1038 * name: the name of the class
1039 * buf: class bytes
1040 * len: length of class bytes
1041 * pd: protection domain
1042 * init: initialize the class
1043 * flags: properties of the class
1044 * classData: private static pre-initialized field
1045 */
1046 JVM_ENTRY(jclass, JVM_LookupDefineClass(JNIEnv *env, jclass lookup, const char *name, const jbyte *buf,
1047 jsize len, jobject pd, jboolean initialize, int flags, jobject classData))
1048
1049 if (lookup == nullptr) {
1050 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Lookup class is null");
1051 }
1052
1053 assert(buf != nullptr, "buf must not be null");
1054
1055 return jvm_lookup_define_class(lookup, name, buf, len, pd, initialize, flags, classData, THREAD);
1056 JVM_END
1057
1058 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
1059
1060 return jvm_define_class_common(name, loader, buf, len, pd, source, THREAD);
1061 JVM_END
1062
1063 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
1064 ResourceMark rm(THREAD);
1065
1066 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
1067 char* str = java_lang_String::as_utf8_string(h_name());
1068
1069 // Sanity check, don't expect null
1070 if (str == nullptr) return nullptr;
1071
1072 // Internalize the string, converting '.' to '/' in string.
1073 char* p = (char*)str;
1074 while (*p != '\0') {
1075 if (*p == '.') {
1076 *p = '/';
1077 }
1078 p++;
1079 }
1080
1081 const int str_len = (int)(p - str);
1082 if (str_len > Symbol::max_length()) {
1083 // It's impossible to create this class; the name cannot fit
1087 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len);
1088
1089 // Security Note:
1090 // The Java level wrapper will perform the necessary security check allowing
1091 // us to pass the null as the initiating class loader.
1092 Handle h_loader(THREAD, JNIHandles::resolve(loader));
1093 Klass* k = SystemDictionary::find_instance_or_array_klass(THREAD, klass_name, h_loader);
1094 #if INCLUDE_CDS
1095 if (k == nullptr) {
1096 // If the class is not already loaded, try to see if it's in the shared
1097 // archive for the current classloader (h_loader).
1098 k = SystemDictionaryShared::find_or_load_shared_class(klass_name, h_loader, CHECK_NULL);
1099 }
1100 #endif
1101 return (k == nullptr) ? nullptr :
1102 (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
1103 JVM_END
1104
1105 // Module support //////////////////////////////////////////////////////////////////////////////
1106
1107 JVM_ENTRY(void, JVM_DefineModule(JNIEnv *env, jobject module, jboolean is_open, jstring version,
1108 jstring location, jobjectArray packages))
1109 Handle h_module (THREAD, JNIHandles::resolve(module));
1110 Modules::define_module(h_module, is_open, version, location, packages, CHECK);
1111 JVM_END
1112
1113 JVM_ENTRY(void, JVM_SetBootLoaderUnnamedModule(JNIEnv *env, jobject module))
1114 Handle h_module (THREAD, JNIHandles::resolve(module));
1115 Modules::set_bootloader_unnamed_module(h_module, CHECK);
1116 JVM_END
1117
1118 JVM_ENTRY(void, JVM_AddModuleExports(JNIEnv *env, jobject from_module, jstring package, jobject to_module))
1119 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1120 Handle h_to_module (THREAD, JNIHandles::resolve(to_module));
1121 Modules::add_module_exports_qualified(h_from_module, package, h_to_module, CHECK);
1122 JVM_END
1123
1124 JVM_ENTRY(void, JVM_AddModuleExportsToAllUnnamed(JNIEnv *env, jobject from_module, jstring package))
1125 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1126 Modules::add_module_exports_to_all_unnamed(h_from_module, package, CHECK);
1127 JVM_END
1128
1129 JVM_ENTRY(void, JVM_AddModuleExportsToAll(JNIEnv *env, jobject from_module, jstring package))
1130 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1131 Modules::add_module_exports(h_from_module, package, Handle(), CHECK);
1132 JVM_END
1133
1134 JVM_ENTRY (void, JVM_AddReadsModule(JNIEnv *env, jobject from_module, jobject source_module))
1135 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1136 Handle h_source_module (THREAD, JNIHandles::resolve(source_module));
1137 Modules::add_reads_module(h_from_module, h_source_module, CHECK);
1138 JVM_END
1139
1140 JVM_ENTRY(void, JVM_DefineArchivedModules(JNIEnv *env, jobject platform_loader, jobject system_loader))
1141 Handle h_platform_loader (THREAD, JNIHandles::resolve(platform_loader));
1142 Handle h_system_loader (THREAD, JNIHandles::resolve(system_loader));
1143 Modules::define_archived_modules(h_platform_loader, h_system_loader, CHECK);
1144 JVM_END
1145
1146 // Reflection support //////////////////////////////////////////////////////////////////////////////
1147
1148 JVM_ENTRY(jstring, JVM_InitClassName(JNIEnv *env, jclass cls))
1149 assert (cls != nullptr, "illegal class");
1150 JvmtiVMObjectAllocEventCollector oam;
1151 ResourceMark rm(THREAD);
1152 HandleMark hm(THREAD);
1153 Handle java_class(THREAD, JNIHandles::resolve(cls));
1154 oop result = java_lang_Class::name(java_class, CHECK_NULL);
1155 return (jstring) JNIHandles::make_local(THREAD, result);
1156 JVM_END
1157
1158
1159 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
1160 JvmtiVMObjectAllocEventCollector oam;
1161 oop mirror = JNIHandles::resolve_non_null(cls);
1162
1163 // Special handling for primitive objects
1164 if (java_lang_Class::is_primitive(mirror)) {
1165 // Primitive objects does not have any interfaces
1166 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(), 0, CHECK_NULL);
1167 return (jobjectArray) JNIHandles::make_local(THREAD, r);
1168 }
1169
1170 Klass* klass = java_lang_Class::as_Klass(mirror);
1171 // Figure size of result array
1172 int size;
1173 if (klass->is_instance_klass()) {
1174 size = InstanceKlass::cast(klass)->local_interfaces()->length();
1175 } else {
1176 assert(klass->is_objArray_klass() || klass->is_typeArray_klass(), "Illegal mirror klass");
1177 size = 2;
1178 }
1179
1180 // Allocate result array
1181 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(), size, CHECK_NULL);
1182 objArrayHandle result (THREAD, r);
1183 // Fill in result
1184 if (klass->is_instance_klass()) {
1185 // Regular instance klass, fill in all local interfaces
1186 for (int index = 0; index < size; index++) {
1187 InstanceKlass* k = InstanceKlass::cast(klass)->local_interfaces()->at(index);
1188 result->obj_at_put(index, k->java_mirror());
1189 }
1190 } else {
1191 // All arrays implement java.lang.Cloneable and java.io.Serializable
1192 result->obj_at_put(0, vmClasses::Cloneable_klass()->java_mirror());
1193 result->obj_at_put(1, vmClasses::Serializable_klass()->java_mirror());
1194 }
1195 return (jobjectArray) JNIHandles::make_local(THREAD, result());
1196 JVM_END
1197
1198
1199 JVM_ENTRY(jboolean, JVM_IsHiddenClass(JNIEnv *env, jclass cls))
1200 oop mirror = JNIHandles::resolve_non_null(cls);
1201 if (java_lang_Class::is_primitive(mirror)) {
1202 return JNI_FALSE;
1203 }
1204 Klass* k = java_lang_Class::as_Klass(mirror);
1205 return k->is_hidden();
1206 JVM_END
1207
1208
1209 JVM_ENTRY(jobject, JVM_FindScopedValueBindings(JNIEnv *env, jclass cls))
1210 ResourceMark rm(THREAD);
1211 GrowableArray<Handle>* local_array = new GrowableArray<Handle>(12);
1212 JvmtiVMObjectAllocEventCollector oam;
1213
1214 // Iterate through Java frames
1215 vframeStream vfst(thread);
1216 for(; !vfst.at_end(); vfst.next()) {
1217 int loc = -1;
1218 // get method of frame
1219 Method* method = vfst.method();
1220
1221 Symbol *name = method->name();
1222
1223 InstanceKlass* holder = method->method_holder();
1224 if (name == vmSymbols::runWith_method_name()) {
1225 if (holder == vmClasses::Thread_klass()
1226 || holder == vmClasses::ScopedValue_Carrier_klass()) {
1227 loc = 1;
1228 }
1229 }
1230
1231 if (loc != -1) {
1232 javaVFrame *frame = vfst.asJavaVFrame();
1233 StackValueCollection* locals = frame->locals();
1234 StackValue* head_sv = locals->at(loc); // java/lang/ScopedValue$Snapshot
1235 Handle result = head_sv->get_obj();
1236 assert(!head_sv->obj_is_scalar_replaced(), "found scalar-replaced object");
1237 if (result() != nullptr) {
1238 return JNIHandles::make_local(THREAD, result());
1239 }
1240 }
1241 }
1242
1243 return nullptr;
1244 JVM_END
1245
1246 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1247 JvmtiVMObjectAllocEventCollector oam;
1248 // ofClass is a reference to a java_lang_Class object. The mirror object
1249 // of an InstanceKlass
1250 oop ofMirror = JNIHandles::resolve_non_null(ofClass);
1251 if (java_lang_Class::is_primitive(ofMirror) ||
1252 ! java_lang_Class::as_Klass(ofMirror)->is_instance_klass()) {
1253 oop result = oopFactory::new_objArray(vmClasses::Class_klass(), 0, CHECK_NULL);
1254 return (jobjectArray)JNIHandles::make_local(THREAD, result);
1255 }
1256
1257 InstanceKlass* k = java_lang_Class::as_InstanceKlass(ofMirror);
1258 InnerClassesIterator iter(k);
1259
1260 if (iter.length() == 0) {
1261 // Neither an inner nor outer class
1262 oop result = oopFactory::new_objArray(vmClasses::Class_klass(), 0, CHECK_NULL);
1263 return (jobjectArray)JNIHandles::make_local(THREAD, result);
1264 }
1265
1266 // find inner class info
1292 result->obj_at_put(members, inner_klass->java_mirror());
1293 members++;
1294 }
1295 }
1296 }
1297 }
1298
1299 if (members != length) {
1300 // Return array of right length
1301 objArrayOop res = oopFactory::new_objArray(vmClasses::Class_klass(), members, CHECK_NULL);
1302 for(int i = 0; i < members; i++) {
1303 res->obj_at_put(i, result->obj_at(i));
1304 }
1305 return (jobjectArray)JNIHandles::make_local(THREAD, res);
1306 }
1307
1308 return (jobjectArray)JNIHandles::make_local(THREAD, result());
1309 JVM_END
1310
1311
1312 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1313 {
1314 // ofClass is a reference to a java_lang_Class object.
1315 oop ofMirror = JNIHandles::resolve_non_null(ofClass);
1316 if (java_lang_Class::is_primitive(ofMirror)) {
1317 return nullptr;
1318 }
1319 Klass* klass = java_lang_Class::as_Klass(ofMirror);
1320 if (!klass->is_instance_klass()) {
1321 return nullptr;
1322 }
1323
1324 bool inner_is_member = false;
1325 Klass* outer_klass
1326 = InstanceKlass::cast(klass)->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1327 if (outer_klass == nullptr) return nullptr; // already a top-level class
1328 if (!inner_is_member) return nullptr; // a hidden class (inside a method)
1329 return (jclass) JNIHandles::make_local(THREAD, outer_klass->java_mirror());
1330 }
1331 JVM_END
1332
1333 JVM_ENTRY(jstring, JVM_GetSimpleBinaryName(JNIEnv *env, jclass cls))
1334 {
1335 oop mirror = JNIHandles::resolve_non_null(cls);
1336 if (java_lang_Class::is_primitive(mirror)) {
1337 return nullptr;
1338 }
1339 Klass* klass = java_lang_Class::as_Klass(mirror);
1340 if (!klass->is_instance_klass()) {
1341 return nullptr;
1342 }
1343 InstanceKlass* k = InstanceKlass::cast(klass);
1344 int ooff = 0, noff = 0;
1345 if (k->find_inner_classes_attr(&ooff, &noff, THREAD)) {
1346 if (noff != 0) {
1347 constantPoolHandle i_cp(thread, k->constants());
1348 Symbol* name = i_cp->symbol_at(noff);
1349 Handle str = java_lang_String::create_from_symbol(name, CHECK_NULL);
1350 return (jstring) JNIHandles::make_local(THREAD, str());
1351 }
1352 }
1353 return nullptr;
1354 }
1355 JVM_END
1356
1357 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1358 assert (cls != nullptr, "illegal class");
1359 JvmtiVMObjectAllocEventCollector oam;
1360 ResourceMark rm(THREAD);
1361 oop mirror = JNIHandles::resolve_non_null(cls);
1362 // Return null for arrays and primitives
1363 if (!java_lang_Class::is_primitive(mirror)) {
1364 Klass* k = java_lang_Class::as_Klass(mirror);
1365 if (k->is_instance_klass()) {
1366 Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1367 if (sym == nullptr) return nullptr;
1368 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1369 return (jstring) JNIHandles::make_local(THREAD, str());
1370 }
1371 }
1372 return nullptr;
1373 JVM_END
1374
1375
1376 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1377 assert (cls != nullptr, "illegal class");
1378 oop mirror = JNIHandles::resolve_non_null(cls);
1379 // Return null for arrays and primitives
1380 if (!java_lang_Class::is_primitive(mirror)) {
1381 Klass* k = java_lang_Class::as_Klass(mirror);
1382 if (k->is_instance_klass()) {
1383 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1384 return (jbyteArray) JNIHandles::make_local(THREAD, a);
1385 }
1386 }
1387 return nullptr;
1388 JVM_END
1389
1390
1391 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd) {
1392 // some of this code was adapted from from jni_FromReflectedField
1393
1394 oop reflected = JNIHandles::resolve_non_null(field);
1395 oop mirror = java_lang_reflect_Field::clazz(reflected);
1396 int slot = java_lang_reflect_Field::slot(reflected);
1424 int slot = 0;
1425
1426 if (reflected->klass() == vmClasses::reflect_Constructor_klass()) {
1427 mirror = java_lang_reflect_Constructor::clazz(reflected);
1428 slot = java_lang_reflect_Constructor::slot(reflected);
1429 } else {
1430 assert(reflected->klass() == vmClasses::reflect_Method_klass(),
1431 "wrong type");
1432 mirror = java_lang_reflect_Method::clazz(reflected);
1433 slot = java_lang_reflect_Method::slot(reflected);
1434 }
1435 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(mirror);
1436
1437 Method* m = ik->method_with_idnum(slot);
1438 assert(m != nullptr, "cannot find method");
1439 return m; // caller has to deal with null in product mode
1440 }
1441
1442 /* Type use annotations support (JDK 1.8) */
1443
1444 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1445 assert (cls != nullptr, "illegal class");
1446 ResourceMark rm(THREAD);
1447 // Return null for arrays and primitives
1448 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1449 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1450 if (k->is_instance_klass()) {
1451 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1452 if (type_annotations != nullptr) {
1453 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1454 return (jbyteArray) JNIHandles::make_local(THREAD, a);
1455 }
1456 }
1457 }
1458 return nullptr;
1459 JVM_END
1460
1461 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1462 assert (method != nullptr, "illegal method");
1463 // method is a handle to a java.lang.reflect.Method object
1464 Method* m = jvm_get_method_common(method);
1465 if (m == nullptr) {
1466 return nullptr;
1467 }
1468
1469 AnnotationArray* type_annotations = m->type_annotations();
1470 if (type_annotations != nullptr) {
1471 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1472 return (jbyteArray) JNIHandles::make_local(THREAD, a);
1473 }
1474
1475 return nullptr;
1476 JVM_END
1477
1478 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1479 assert (field != nullptr, "illegal field");
1480 fieldDescriptor fd;
1481 bool gotFd = jvm_get_field_common(field, fd);
1482 if (!gotFd) {
1483 return nullptr;
1484 }
1485
1486 return (jbyteArray) JNIHandles::make_local(THREAD, Annotations::make_java_array(fd.type_annotations(), THREAD));
1487 JVM_END
1488
1489 static void bounds_check(const constantPoolHandle& cp, jint index, TRAPS) {
1490 if (!cp->is_within_bounds(index)) {
1491 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1492 }
1493 }
1494
1495 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1496 {
1497 // method is a handle to a java.lang.reflect.Method object
1498 Method* method_ptr = jvm_get_method_common(method);
1499 methodHandle mh (THREAD, method_ptr);
1500 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1501 const int num_params = mh->method_parameters_length();
1502
1503 if (num_params < 0) {
1504 // A -1 return value from method_parameters_length means there is no
1505 // parameter data. Return null to indicate this to the reflection
1506 // API.
1507 assert(num_params == -1, "num_params should be -1 if it is less than zero");
1508 return (jobjectArray)nullptr;
1509 } else {
1510 // Otherwise, we return something up to reflection, even if it is
1511 // a zero-length array. Why? Because in some cases this can
1512 // trigger a MalformedParametersException.
1513
1514 // make sure all the symbols are properly formatted
1515 for (int i = 0; i < num_params; i++) {
1528 objArrayOop result_oop = oopFactory::new_objArray(vmClasses::reflect_Parameter_klass(), num_params, CHECK_NULL);
1529 objArrayHandle result (THREAD, result_oop);
1530
1531 for (int i = 0; i < num_params; i++) {
1532 MethodParametersElement* params = mh->method_parameters_start();
1533 // For a 0 index, give a null symbol
1534 Symbol* sym = 0 != params[i].name_cp_index ?
1535 mh->constants()->symbol_at(params[i].name_cp_index) : nullptr;
1536 int flags = params[i].flags;
1537 oop param = Reflection::new_parameter(reflected_method, i, sym,
1538 flags, CHECK_NULL);
1539 result->obj_at_put(i, param);
1540 }
1541 return (jobjectArray)JNIHandles::make_local(THREAD, result());
1542 }
1543 }
1544 JVM_END
1545
1546 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1547
1548 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1549 {
1550 JvmtiVMObjectAllocEventCollector oam;
1551
1552 oop ofMirror = JNIHandles::resolve_non_null(ofClass);
1553 // Exclude primitive types and array types
1554 if (java_lang_Class::is_primitive(ofMirror) ||
1555 java_lang_Class::as_Klass(ofMirror)->is_array_klass()) {
1556 // Return empty array
1557 oop res = oopFactory::new_objArray(vmClasses::reflect_Field_klass(), 0, CHECK_NULL);
1558 return (jobjectArray) JNIHandles::make_local(THREAD, res);
1559 }
1560
1561 InstanceKlass* k = java_lang_Class::as_InstanceKlass(ofMirror);
1562 constantPoolHandle cp(THREAD, k->constants());
1563
1564 // Ensure class is linked
1565 k->link_class(CHECK_NULL);
1566
1567 // Allocate result
1568 int num_fields;
1579 objArrayOop r = oopFactory::new_objArray(vmClasses::reflect_Field_klass(), num_fields, CHECK_NULL);
1580 objArrayHandle result (THREAD, r);
1581
1582 int out_idx = 0;
1583 fieldDescriptor fd;
1584 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1585 if (!publicOnly || fs.access_flags().is_public()) {
1586 fd.reinitialize(k, fs.to_FieldInfo());
1587 oop field = Reflection::new_field(&fd, CHECK_NULL);
1588 result->obj_at_put(out_idx, field);
1589 ++out_idx;
1590 }
1591 }
1592 assert(out_idx == num_fields, "just checking");
1593 return (jobjectArray) JNIHandles::make_local(THREAD, result());
1594 }
1595 JVM_END
1596
1597 // A class is a record if and only if it is final and a direct subclass of
1598 // java.lang.Record and has a Record attribute; otherwise, it is not a record.
1599 JVM_ENTRY(jboolean, JVM_IsRecord(JNIEnv *env, jclass cls))
1600 {
1601 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1602 if (k != nullptr && k->is_instance_klass()) {
1603 InstanceKlass* ik = InstanceKlass::cast(k);
1604 return ik->is_record();
1605 } else {
1606 return false;
1607 }
1608 }
1609 JVM_END
1610
1611 // Returns an array containing the components of the Record attribute,
1612 // or null if the attribute is not present.
1613 //
1614 // Note that this function returns the components of the Record attribute
1615 // even if the class is not a record.
1616 JVM_ENTRY(jobjectArray, JVM_GetRecordComponents(JNIEnv* env, jclass ofClass))
1617 {
1618 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve_non_null(ofClass));
1619
1620 Array<RecordComponent*>* components = ik->record_components();
1621 if (components != nullptr) {
1622 JvmtiVMObjectAllocEventCollector oam;
1623 constantPoolHandle cp(THREAD, ik->constants());
1624 int length = components->length();
1625 assert(length >= 0, "unexpected record_components length");
1626 objArrayOop record_components =
1627 oopFactory::new_objArray(vmClasses::RecordComponent_klass(), length, CHECK_NULL);
1628 objArrayHandle components_h (THREAD, record_components);
1629
1630 for (int x = 0; x < length; x++) {
1631 RecordComponent* component = components->at(x);
1632 assert(component != nullptr, "unexpected null record component");
1633 oop component_oop = java_lang_reflect_RecordComponent::create(ik, component, CHECK_NULL);
1634 components_h->obj_at_put(x, component_oop);
1635 }
1636 return (jobjectArray)JNIHandles::make_local(THREAD, components_h());
1701 for (int i = 0; i < num_methods; i++) {
1702 methodHandle method(THREAD, k->method_with_idnum(idnums->at(i)));
1703 if (method.is_null()) {
1704 // Method may have been deleted and seems this API can handle null
1705 // Otherwise should probably put a method that throws NSME
1706 result->obj_at_put(i, nullptr);
1707 } else {
1708 oop m;
1709 if (want_constructor) {
1710 m = Reflection::new_constructor(method, CHECK_NULL);
1711 } else {
1712 m = Reflection::new_method(method, false, CHECK_NULL);
1713 }
1714 result->obj_at_put(i, m);
1715 }
1716 }
1717
1718 return (jobjectArray) JNIHandles::make_local(THREAD, result());
1719 }
1720
1721 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1722 {
1723 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1724 /*want_constructor*/ false,
1725 vmClasses::reflect_Method_klass(), THREAD);
1726 }
1727 JVM_END
1728
1729 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1730 {
1731 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1732 /*want_constructor*/ true,
1733 vmClasses::reflect_Constructor_klass(), THREAD);
1734 }
1735 JVM_END
1736
1737 JVM_ENTRY(jboolean, JVM_AreNestMates(JNIEnv *env, jclass current, jclass member))
1738 {
1739 InstanceKlass* c = java_lang_Class::as_InstanceKlass(JNIHandles::resolve_non_null(current));
1740 InstanceKlass* m = java_lang_Class::as_InstanceKlass(JNIHandles::resolve_non_null(member));
1741 return c->has_nestmate_access_to(m, THREAD);
1742 }
1743 JVM_END
1744
1745 JVM_ENTRY(jclass, JVM_GetNestHost(JNIEnv* env, jclass current))
1746 {
1747 // current is not a primitive or array class
1748 InstanceKlass* c = java_lang_Class::as_InstanceKlass(JNIHandles::resolve_non_null(current));
1749 InstanceKlass* host = c->nest_host(THREAD);
1750 return (jclass) (host == nullptr ? nullptr :
1751 JNIHandles::make_local(THREAD, host->java_mirror()));
1752 }
1753 JVM_END
1754
1755 JVM_ENTRY(jobjectArray, JVM_GetNestMembers(JNIEnv* env, jclass current))
1756 {
1757 // current is not a primitive or array class
1758 ResourceMark rm(THREAD);
1759 InstanceKlass* c = java_lang_Class::as_InstanceKlass(JNIHandles::resolve_non_null(current));
1760 InstanceKlass* host = c->nest_host(THREAD);
1761
1762 log_trace(class, nestmates)("Calling GetNestMembers for type %s with nest-host %s",
1763 c->external_name(), host->external_name());
1764 {
1765 JvmtiVMObjectAllocEventCollector oam;
1766 Array<u2>* members = host->nest_members();
1767 int length = members == nullptr ? 0 : members->length();
1768
1769 log_trace(class, nestmates)(" - host has %d listed nest members", length);
1770
1771 // nest host is first in the array so make it one bigger
1772 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(),
1773 length + 1, CHECK_NULL);
1774 objArrayHandle result(THREAD, r);
1775 result->obj_at_put(0, host->java_mirror());
1813 log_trace(class, nestmates)(" - compacting array from length %d to %d",
1814 length + 1, count + 1);
1815
1816 objArrayOop r2 = oopFactory::new_objArray(vmClasses::Class_klass(),
1817 count + 1, CHECK_NULL);
1818 objArrayHandle result2(THREAD, r2);
1819 for (int i = 0; i < count + 1; i++) {
1820 result2->obj_at_put(i, result->obj_at(i));
1821 }
1822 return (jobjectArray)JNIHandles::make_local(THREAD, result2());
1823 }
1824 }
1825 else {
1826 assert(host == c || c->is_hidden(), "must be singleton nest or dynamic nestmate");
1827 }
1828 return (jobjectArray)JNIHandles::make_local(THREAD, result());
1829 }
1830 }
1831 JVM_END
1832
1833 JVM_ENTRY(jobjectArray, JVM_GetPermittedSubclasses(JNIEnv* env, jclass current))
1834 {
1835 oop mirror = JNIHandles::resolve_non_null(current);
1836 assert(!java_lang_Class::is_primitive(mirror), "should not be");
1837 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(mirror);
1838
1839 ResourceMark rm(THREAD);
1840 log_trace(class, sealed)("Calling GetPermittedSubclasses for %s type %s",
1841 ik->is_sealed() ? "sealed" : "non-sealed", ik->external_name());
1842 if (ik->is_sealed()) {
1843 JvmtiVMObjectAllocEventCollector oam;
1844 Array<u2>* subclasses = ik->permitted_subclasses();
1845 int length = subclasses->length();
1846
1847 log_trace(class, sealed)(" - sealed class has %d permitted subclasses", length);
1848
1849 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(),
1850 length, CHECK_NULL);
1851 objArrayHandle result(THREAD, r);
1852 int count = 0;
1853 for (int i = 0; i < length; i++) {
1875 }
1876 if (count < length) {
1877 // we had invalid entries so we need to compact the array
1878 objArrayOop r2 = oopFactory::new_objArray(vmClasses::Class_klass(),
1879 count, CHECK_NULL);
1880 objArrayHandle result2(THREAD, r2);
1881 for (int i = 0; i < count; i++) {
1882 result2->obj_at_put(i, result->obj_at(i));
1883 }
1884 return (jobjectArray)JNIHandles::make_local(THREAD, result2());
1885 }
1886 return (jobjectArray)JNIHandles::make_local(THREAD, result());
1887 } else {
1888 return nullptr;
1889 }
1890 }
1891 JVM_END
1892
1893 // Constant pool access //////////////////////////////////////////////////////////
1894
1895 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1896 {
1897 JvmtiVMObjectAllocEventCollector oam;
1898 oop mirror = JNIHandles::resolve_non_null(cls);
1899 // Return null for primitives and arrays
1900 if (!java_lang_Class::is_primitive(mirror)) {
1901 Klass* k = java_lang_Class::as_Klass(mirror);
1902 if (k->is_instance_klass()) {
1903 InstanceKlass* k_h = InstanceKlass::cast(k);
1904 Handle jcp = reflect_ConstantPool::create(CHECK_NULL);
1905 reflect_ConstantPool::set_cp(jcp(), k_h->constants());
1906 return JNIHandles::make_local(THREAD, jcp());
1907 }
1908 }
1909 return nullptr;
1910 }
1911 JVM_END
1912
1913
1914 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj))
1915 {
1916 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1917 return cp->length();
1918 }
1919 JVM_END
1920
1921
1922 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jint index))
1923 {
1924 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1925 bounds_check(cp, index, CHECK_NULL);
1926 constantTag tag = cp->tag_at(index);
1927 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1928 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1929 }
1930 Klass* k = cp->klass_at(index, CHECK_NULL);
1931 return (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
1932 }
1933 JVM_END
1934
1935 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jint index))
1936 {
1937 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1938 bounds_check(cp, index, CHECK_NULL);
1939 constantTag tag = cp->tag_at(index);
1940 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1941 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1942 }
1943 Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
1944 if (k == nullptr) return nullptr;
1945 return (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
1946 }
1947 JVM_END
1948
1949 static jobject get_method_at_helper(const constantPoolHandle& cp, jint index, bool force_resolution, TRAPS) {
1950 constantTag tag = cp->tag_at(index);
1951 if (!tag.is_method() && !tag.is_interface_method()) {
1952 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1953 }
1954 int klass_ref = cp->uncached_klass_ref_index_at(index);
1955 Klass* k_o;
1959 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
1960 if (k_o == nullptr) return nullptr;
1961 }
1962 InstanceKlass* k = InstanceKlass::cast(k_o);
1963 Symbol* name = cp->uncached_name_ref_at(index);
1964 Symbol* sig = cp->uncached_signature_ref_at(index);
1965 methodHandle m (THREAD, k->find_method(name, sig));
1966 if (m.is_null()) {
1967 THROW_MSG_NULL(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
1968 }
1969 oop method;
1970 if (m->is_object_initializer()) {
1971 method = Reflection::new_constructor(m, CHECK_NULL);
1972 } else {
1973 // new_method accepts <clinit> as Method here
1974 method = Reflection::new_method(m, true, CHECK_NULL);
1975 }
1976 return JNIHandles::make_local(THREAD, method);
1977 }
1978
1979 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jint index))
1980 {
1981 JvmtiVMObjectAllocEventCollector oam;
1982 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1983 bounds_check(cp, index, CHECK_NULL);
1984 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
1985 return res;
1986 }
1987 JVM_END
1988
1989 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jint index))
1990 {
1991 JvmtiVMObjectAllocEventCollector oam;
1992 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1993 bounds_check(cp, index, CHECK_NULL);
1994 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
1995 return res;
1996 }
1997 JVM_END
1998
1999 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2000 constantTag tag = cp->tag_at(index);
2001 if (!tag.is_field()) {
2002 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2003 }
2004 int klass_ref = cp->uncached_klass_ref_index_at(index);
2005 Klass* k_o;
2006 if (force_resolution) {
2007 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2008 } else {
2009 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2010 if (k_o == nullptr) return nullptr;
2011 }
2012 InstanceKlass* k = InstanceKlass::cast(k_o);
2013 Symbol* name = cp->uncached_name_ref_at(index);
2014 Symbol* sig = cp->uncached_signature_ref_at(index);
2015 fieldDescriptor fd;
2016 Klass* target_klass = k->find_field(name, sig, &fd);
2017 if (target_klass == nullptr) {
2018 THROW_MSG_NULL(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2019 }
2020 oop field = Reflection::new_field(&fd, CHECK_NULL);
2021 return JNIHandles::make_local(THREAD, field);
2022 }
2023
2024 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jint index))
2025 {
2026 JvmtiVMObjectAllocEventCollector oam;
2027 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2028 bounds_check(cp, index, CHECK_NULL);
2029 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2030 return res;
2031 }
2032 JVM_END
2033
2034 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jint index))
2035 {
2036 JvmtiVMObjectAllocEventCollector oam;
2037 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2038 bounds_check(cp, index, CHECK_NULL);
2039 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2040 return res;
2041 }
2042 JVM_END
2043
2044 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jint index))
2045 {
2046 JvmtiVMObjectAllocEventCollector oam;
2047 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2048 bounds_check(cp, index, CHECK_NULL);
2049 constantTag tag = cp->tag_at(index);
2050 if (!tag.is_field_or_method()) {
2051 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2052 }
2053 int klass_ref = cp->uncached_klass_ref_index_at(index);
2054 Symbol* klass_name = cp->klass_name_at(klass_ref);
2055 Symbol* member_name = cp->uncached_name_ref_at(index);
2056 Symbol* member_sig = cp->uncached_signature_ref_at(index);
2057 objArrayOop dest_o = oopFactory::new_objArray(vmClasses::String_klass(), 3, CHECK_NULL);
2058 objArrayHandle dest(THREAD, dest_o);
2059 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2060 dest->obj_at_put(0, str());
2061 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2062 dest->obj_at_put(1, str());
2063 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2064 dest->obj_at_put(2, str());
2065 return (jobjectArray) JNIHandles::make_local(THREAD, dest());
2066 }
2067 JVM_END
2068
2069 JVM_ENTRY(jint, JVM_ConstantPoolGetClassRefIndexAt(JNIEnv *env, jobject obj, jint index))
2070 {
2071 JvmtiVMObjectAllocEventCollector oam;
2072 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2073 bounds_check(cp, index, CHECK_0);
2074 constantTag tag = cp->tag_at(index);
2075 if (!tag.is_field_or_method()) {
2076 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2077 }
2078 return (jint) cp->uncached_klass_ref_index_at(index);
2079 }
2080 JVM_END
2081
2082 JVM_ENTRY(jint, JVM_ConstantPoolGetNameAndTypeRefIndexAt(JNIEnv *env, jobject obj, jint index))
2083 {
2084 JvmtiVMObjectAllocEventCollector oam;
2085 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2086 bounds_check(cp, index, CHECK_0);
2087 constantTag tag = cp->tag_at(index);
2088 if (!tag.is_invoke_dynamic() && !tag.is_field_or_method()) {
2089 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2090 }
2091 return (jint) cp->uncached_name_and_type_ref_index_at(index);
2092 }
2093 JVM_END
2094
2095 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetNameAndTypeRefInfoAt(JNIEnv *env, jobject obj, jint index))
2096 {
2097 JvmtiVMObjectAllocEventCollector oam;
2098 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2099 bounds_check(cp, index, CHECK_NULL);
2100 constantTag tag = cp->tag_at(index);
2101 if (!tag.is_name_and_type()) {
2102 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2103 }
2104 Symbol* member_name = cp->symbol_at(cp->name_ref_index_at(index));
2105 Symbol* member_sig = cp->symbol_at(cp->signature_ref_index_at(index));
2106 objArrayOop dest_o = oopFactory::new_objArray(vmClasses::String_klass(), 2, CHECK_NULL);
2107 objArrayHandle dest(THREAD, dest_o);
2108 Handle str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2109 dest->obj_at_put(0, str());
2110 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2111 dest->obj_at_put(1, str());
2112 return (jobjectArray) JNIHandles::make_local(THREAD, dest());
2113 }
2114 JVM_END
2115
2116 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jint index))
2117 {
2118 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2119 bounds_check(cp, index, CHECK_0);
2120 constantTag tag = cp->tag_at(index);
2121 if (!tag.is_int()) {
2122 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2123 }
2124 return cp->int_at(index);
2125 }
2126 JVM_END
2127
2128 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jint index))
2129 {
2130 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2131 bounds_check(cp, index, CHECK_(0L));
2132 constantTag tag = cp->tag_at(index);
2133 if (!tag.is_long()) {
2134 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2135 }
2136 return cp->long_at(index);
2137 }
2138 JVM_END
2139
2140 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jint index))
2141 {
2142 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2143 bounds_check(cp, index, CHECK_(0.0f));
2144 constantTag tag = cp->tag_at(index);
2145 if (!tag.is_float()) {
2146 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2147 }
2148 return cp->float_at(index);
2149 }
2150 JVM_END
2151
2152 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jint index))
2153 {
2154 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2155 bounds_check(cp, index, CHECK_(0.0));
2156 constantTag tag = cp->tag_at(index);
2157 if (!tag.is_double()) {
2158 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2159 }
2160 return cp->double_at(index);
2161 }
2162 JVM_END
2163
2164 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jint index))
2165 {
2166 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2167 bounds_check(cp, index, CHECK_NULL);
2168 constantTag tag = cp->tag_at(index);
2169 if (!tag.is_string()) {
2170 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2171 }
2172 oop str = cp->string_at(index, CHECK_NULL);
2173 return (jstring) JNIHandles::make_local(THREAD, str);
2174 }
2175 JVM_END
2176
2177 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jint index))
2178 {
2179 JvmtiVMObjectAllocEventCollector oam;
2180 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2181 bounds_check(cp, index, CHECK_NULL);
2182 constantTag tag = cp->tag_at(index);
2183 if (!tag.is_symbol()) {
2184 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2185 }
2186 Symbol* sym = cp->symbol_at(index);
2187 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2188 return (jstring) JNIHandles::make_local(THREAD, str());
2189 }
2190 JVM_END
2191
2192 JVM_ENTRY(jbyte, JVM_ConstantPoolGetTagAt(JNIEnv *env, jobject obj, jint index))
2193 {
2194 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2195 bounds_check(cp, index, CHECK_0);
2196 constantTag tag = cp->tag_at(index);
2197 jbyte result = tag.value();
2198 // If returned tag values are not from the JVM spec, e.g. tags from 100 to 105,
2199 // they are changed to the corresponding tags from the JVM spec, so that java code in
2200 // sun.reflect.ConstantPool will return only tags from the JVM spec, not internal ones.
2201 if (tag.is_klass_or_reference()) {
2202 result = JVM_CONSTANT_Class;
2203 } else if (tag.is_string_index()) {
2204 result = JVM_CONSTANT_String;
2205 } else if (tag.is_method_type_in_error()) {
2206 result = JVM_CONSTANT_MethodType;
2207 } else if (tag.is_method_handle_in_error()) {
2208 result = JVM_CONSTANT_MethodHandle;
2209 } else if (tag.is_dynamic_constant_in_error()) {
2210 result = JVM_CONSTANT_Dynamic;
2211 }
2212 return result;
2213 }
2214 JVM_END
2215
2216 // Assertion support. //////////////////////////////////////////////////////////
2217
2218 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2219 assert(cls != nullptr, "bad class");
2220
2221 oop r = JNIHandles::resolve(cls);
2222 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2223 if (java_lang_Class::is_primitive(r)) return false;
2224
2225 Klass* k = java_lang_Class::as_Klass(r);
2226 assert(k->is_instance_klass(), "must be an instance klass");
2227 if (!k->is_instance_klass()) return false;
2228
2229 ResourceMark rm(THREAD);
2230 const char* name = k->name()->as_C_string();
2231 bool system_class = k->class_loader() == nullptr;
2232 return JavaAssertions::enabled(name, system_class);
2233
2234 JVM_END
2235
2236
2237 // Return a new AssertionStatusDirectives object with the fields filled in with
2238 // command-line assertion arguments (i.e., -ea, -da).
2239 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2240 JvmtiVMObjectAllocEventCollector oam;
2241 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2242 return JNIHandles::make_local(THREAD, asd);
2243 JVM_END
2244
2245 // Verification ////////////////////////////////////////////////////////////////////////////////
2246
2247 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2248
2249 // RedefineClasses support: bug 6214132 caused verification to fail.
2250 // All functions from this section, unless noted otherwise, should call the functions
2251 // get_klass_considering_redefinition(), or
2252 // get_instance_klass_considering_redefinition()
2253 // These functions return JvmtiThreadState::_scratch_class if the verifier
2254 // was invoked in the middle of the redefinition of cls.
2255 // See jvmtiThreadState.hpp for details.
2256
2257 inline Klass* get_klass_considering_redefinition(jclass cls, JavaThread* thread) {
2258 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2259 if (k->is_instance_klass()) {
2260 return JvmtiThreadState::class_to_verify_considering_redefinition(InstanceKlass::cast(k), thread);
2261 } else {
2262 return k;
2263 }
2264 }
2265
2266 inline InstanceKlass* get_instance_klass_considering_redefinition(jclass cls, JavaThread* thread) {
2267 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve_non_null(cls));
2268 return JvmtiThreadState::class_to_verify_considering_redefinition(ik, thread);
2269 }
2270
2271 JVM_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
2272 oop mirror = JNIHandles::resolve_non_null(cls);
2273 if (java_lang_Class::is_primitive(mirror)) {
2274 return JNI_FALSE;
2275 }
2276 Klass* k = java_lang_Class::as_Klass(mirror);
2277 // This isn't necessary since answer is the same because redefinition
2278 // has already checked this matches for the scratch class.
2279 // k = get_klass_considering_redefinition(cls, thread)
2280 jboolean result = k->is_interface();
2281 assert(!result || k->is_instance_klass(),
2282 "all interfaces are instance types");
2283 return result;
2284 JVM_END
2285
2286 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2287 // No need to call get_klass_considering_redefinition() as redefinition cannot change a class's name.
2288 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2289 return k->name()->as_utf8();
2290 JVM_END
2291
2292
2293 JVM_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2294 Klass* k = get_klass_considering_redefinition(cls, thread);
2295 // types will have length zero if this is not an InstanceKlass
2296 // (length is determined by call to JVM_GetClassCPEntriesCount)
2297 if (k->is_instance_klass()) {
2298 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2299 for (int index = cp->length() - 1; index >= 0; index--) {
2300 constantTag tag = cp->tag_at(index);
2301 types[index] = (tag.is_unresolved_klass()) ? (unsigned char) JVM_CONSTANT_Class : tag.value();
2302 }
2303 }
2304 JVM_END
2305
2306
2307 JVM_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2308 Klass* k = get_klass_considering_redefinition(cls, thread);
2309 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->constants()->length();
2310 JVM_END
2311
2312
2313 JVM_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2314 Klass* k = get_klass_considering_redefinition(cls, thread);
2315 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->java_fields_count();
2316 JVM_END
2317
2318
2319 JVM_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2320 Klass* k = get_klass_considering_redefinition(cls, thread);
2321 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->methods()->length();
2322 JVM_END
2323
2324
2325 // The following methods, used for the verifier, are never called with
2326 // array klasses, so a direct cast to InstanceKlass is safe.
2327 // Typically, these methods are called in a loop with bounds determined
2328 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2329 // zero for arrays.
2330 JVM_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2331 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2332 Method* method = ik->methods()->at(method_index);
2333 int length = method->checked_exceptions_length();
2334 if (length > 0) {
2335 CheckedExceptionElement* table= method->checked_exceptions_start();
2336 for (int i = 0; i < length; i++) {
2337 exceptions[i] = table[i].class_cp_index;
2338 }
2339 }
2340 JVM_END
2341
2342
2343 JVM_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2344 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2345 Method* method = ik->methods()->at(method_index);
2346 return method->checked_exceptions_length();
2347 JVM_END
2348
2349
2350 JVM_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2351 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2352 Method* method = ik->methods()->at(method_index);
2353 memcpy(code, method->code_base(), method->code_size());
2354 JVM_END
2355
2356
2357 JVM_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2358 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2359 Method* method = ik->methods()->at(method_index);
2360 return method->code_size();
2361 JVM_END
2362
2363
2364 JVM_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2365 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2366 Method* method = ik->methods()->at(method_index);
2367 ExceptionTable extable(method);
2368 entry->start_pc = extable.start_pc(entry_index);
2369 entry->end_pc = extable.end_pc(entry_index);
2370 entry->handler_pc = extable.handler_pc(entry_index);
2371 entry->catchType = extable.catch_type_index(entry_index);
2372 JVM_END
2373
2374
2375 JVM_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2376 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2377 Method* method = ik->methods()->at(method_index);
2378 return method->exception_table_length();
2379 JVM_END
2380
2381
2382 JVM_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2383 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2384 Method* method = ik->methods()->at(method_index);
2385 return method->access_flags().as_method_flags();
2386 JVM_END
2387
2388
2389 JVM_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2390 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2391 return ik->field_access_flags(field_index);
2392 JVM_END
2393
2394
2395 JVM_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2396 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2397 Method* method = ik->methods()->at(method_index);
2398 return method->max_locals();
2399 JVM_END
2400
2401
2402 JVM_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2403 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2404 Method* method = ik->methods()->at(method_index);
2405 return method->size_of_parameters();
2406 JVM_END
2407
2408
2409 JVM_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2410 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2411 Method* method = ik->methods()->at(method_index);
2412 return method->verifier_max_stack();
2413 JVM_END
2414
2415
2416 JVM_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2417 ResourceMark rm(THREAD);
2418 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2419 Method* method = ik->methods()->at(method_index);
2420 return method->name() == vmSymbols::object_initializer_name();
2421 JVM_END
2422
2423
2424 JVM_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2425 ResourceMark rm(THREAD);
2426 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2427 Method* method = ik->methods()->at(method_index);
2428 return method->is_overpass();
2429 JVM_END
2430
2431 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2432 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2433 Method* method = ik->methods()->at(method_index);
2434 return method->name()->as_utf8();
2435 JVM_END
2436
2437
2438 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2439 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2440 Method* method = ik->methods()->at(method_index);
2441 return method->signature()->as_utf8();
2442 JVM_END
2443
2444 /**
2445 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2446 * read entries in the constant pool. Since the old verifier always
2447 * works on a copy of the code, it will not see any rewriting that
2448 * may possibly occur in the middle of verification. So it is important
2449 * that nothing it calls tries to use the cpCache instead of the raw
2450 * constant pool, so we must use cp->uncached_x methods when appropriate.
2451 */
2452 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2453 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2454 ConstantPool* cp = ik->constants();
2455 switch (cp->tag_at(cp_index).value()) {
2456 case JVM_CONSTANT_Fieldref:
2457 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2458 default:
2459 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2460 }
2461 ShouldNotReachHere();
2462 return nullptr;
2463 JVM_END
2464
2465
2466 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2467 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2468 ConstantPool* cp = ik->constants();
2469 switch (cp->tag_at(cp_index).value()) {
2470 case JVM_CONSTANT_InterfaceMethodref:
2471 case JVM_CONSTANT_Methodref:
2472 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2473 default:
2474 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2475 }
2476 ShouldNotReachHere();
2477 return nullptr;
2478 JVM_END
2479
2480
2481 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2482 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2483 ConstantPool* cp = ik->constants();
2484 switch (cp->tag_at(cp_index).value()) {
2485 case JVM_CONSTANT_InterfaceMethodref:
2486 case JVM_CONSTANT_Methodref:
2487 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2488 default:
2489 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2490 }
2491 ShouldNotReachHere();
2492 return nullptr;
2493 JVM_END
2494
2495
2496 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2497 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2498 ConstantPool* cp = ik->constants();
2499 switch (cp->tag_at(cp_index).value()) {
2500 case JVM_CONSTANT_Fieldref:
2501 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2502 default:
2503 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2504 }
2505 ShouldNotReachHere();
2506 return nullptr;
2507 JVM_END
2508
2509
2510 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2511 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2512 ConstantPool* cp = ik->constants();
2513 Symbol* classname = cp->klass_name_at(cp_index);
2514 return classname->as_utf8();
2515 JVM_END
2516
2517
2518 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2519 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2520 ConstantPool* cp = ik->constants();
2521 switch (cp->tag_at(cp_index).value()) {
2522 case JVM_CONSTANT_Fieldref: {
2523 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2524 Symbol* classname = cp->klass_name_at(class_index);
2525 return classname->as_utf8();
2526 }
2527 default:
2528 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2529 }
2530 ShouldNotReachHere();
2531 return nullptr;
2532 JVM_END
2533
2534
2535 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2536 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2537 ConstantPool* cp = ik->constants();
2538 switch (cp->tag_at(cp_index).value()) {
2539 case JVM_CONSTANT_Methodref:
2540 case JVM_CONSTANT_InterfaceMethodref: {
2541 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2542 Symbol* classname = cp->klass_name_at(class_index);
2543 return classname->as_utf8();
2544 }
2545 default:
2546 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2547 }
2548 ShouldNotReachHere();
2549 return nullptr;
2550 JVM_END
2551
2552
2553 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2554 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2555 InstanceKlass* ik_called = get_instance_klass_considering_redefinition(called_cls, thread);
2556 ConstantPool* cp = ik->constants();
2557 ConstantPool* cp_called = ik_called->constants();
2558 switch (cp->tag_at(cp_index).value()) {
2559 case JVM_CONSTANT_Fieldref: {
2560 Symbol* name = cp->uncached_name_ref_at(cp_index);
2561 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2562 for (JavaFieldStream fs(ik_called); !fs.done(); fs.next()) {
2563 if (fs.name() == name && fs.signature() == signature) {
2564 return fs.access_flags().as_field_flags();
2565 }
2566 }
2567 return -1;
2568 }
2569 default:
2570 fatal("JVM_GetCPFieldModifiers: illegal constant");
2571 }
2572 ShouldNotReachHere();
2573 return 0;
2574 JVM_END
2575
2576
2577 JVM_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2578 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2579 InstanceKlass* ik_called = get_instance_klass_considering_redefinition(called_cls, thread);
2580 ConstantPool* cp = ik->constants();
2581 switch (cp->tag_at(cp_index).value()) {
2582 case JVM_CONSTANT_Methodref:
2583 case JVM_CONSTANT_InterfaceMethodref: {
2584 Symbol* name = cp->uncached_name_ref_at(cp_index);
2585 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2586 Array<Method*>* methods = ik_called->methods();
2587 int methods_count = methods->length();
2588 for (int i = 0; i < methods_count; i++) {
2589 Method* method = methods->at(i);
2590 if (method->name() == name && method->signature() == signature) {
2591 return method->access_flags().as_method_flags();
2592 }
2593 }
2594 return -1;
2595 }
2596 default:
2597 fatal("JVM_GetCPMethodModifiers: illegal constant");
2598 }
2599 ShouldNotReachHere();
2600 return 0;
2601 JVM_END
2602
2603
2604 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2605
2606 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2607 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2608 JVM_END
2609
2610
2611 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2612 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2613 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2614 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2615 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2616 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2617 JVM_END
2618
2619 // Printing support //////////////////////////////////////////////////
2620 extern "C" {
2621
2622 ATTRIBUTE_PRINTF(3, 0)
2623 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2624 // Reject count values that are negative signed values converted to
2625 // unsigned; see bug 4399518, 4417214
2626 if ((intptr_t)count <= 0) return -1;
2627
2628 int result = os::vsnprintf(str, count, fmt, args);
2629 if (result > 0 && (size_t)result >= count) {
2630 result = -1;
2631 }
2690 // In most of the JVM thread support functions we need to access the
2691 // thread through a ThreadsListHandle to prevent it from exiting and
2692 // being reclaimed while we try to operate on it. The exceptions to this
2693 // rule are when operating on the current thread, or if the monitor of
2694 // the target java.lang.Thread is locked at the Java level - in both
2695 // cases the target cannot exit.
2696
2697 static void thread_entry(JavaThread* thread, TRAPS) {
2698 HandleMark hm(THREAD);
2699 Handle obj(THREAD, thread->threadObj());
2700 JavaValue result(T_VOID);
2701 JavaCalls::call_virtual(&result,
2702 obj,
2703 vmClasses::Thread_klass(),
2704 vmSymbols::run_method_name(),
2705 vmSymbols::void_method_signature(),
2706 THREAD);
2707 }
2708
2709
2710 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2711 #if INCLUDE_CDS
2712 if (CDSConfig::allow_only_single_java_thread()) {
2713 // During java -Xshare:dump, if we allow multiple Java threads to
2714 // execute in parallel, symbols and classes may be loaded in
2715 // random orders which will make the resulting CDS archive
2716 // non-deterministic.
2717 //
2718 // Lucikly, during java -Xshare:dump, it's important to run only
2719 // the code in the main Java thread (which is NOT started here) that
2720 // creates the module graph, etc. It's safe to not start the other
2721 // threads which are launched by class static initializers
2722 // (ReferenceHandler, FinalizerThread and CleanerImpl).
2723 if (log_is_enabled(Info, aot)) {
2724 ResourceMark rm;
2725 oop t = JNIHandles::resolve_non_null(jthread);
2726 log_info(aot)("JVM_StartThread() ignored: %s", t->klass()->external_name());
2727 }
2728 return;
2729 }
2730 #endif
2787 log_warning(os, thread)("Failed to start the native thread for java.lang.Thread \"%s\"",
2788 JavaThread::name_for(JNIHandles::resolve_non_null(jthread)));
2789 // No one should hold a reference to the 'native_thread'.
2790 native_thread->smr_delete();
2791 if (JvmtiExport::should_post_resource_exhausted()) {
2792 JvmtiExport::post_resource_exhausted(
2793 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2794 os::native_thread_creation_failed_msg());
2795 }
2796 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2797 os::native_thread_creation_failed_msg());
2798 }
2799
2800 JFR_ONLY(Jfr::on_java_thread_start(thread, native_thread);)
2801
2802 Thread::start(native_thread);
2803
2804 JVM_END
2805
2806
2807 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
2808 ThreadsListHandle tlh(thread);
2809 oop java_thread = nullptr;
2810 JavaThread* receiver = nullptr;
2811 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, &java_thread);
2812 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
2813
2814 if (is_alive) {
2815 // jthread refers to a live JavaThread.
2816 Thread::set_priority(receiver, (ThreadPriority)prio);
2817 }
2818 // Implied else: If the JavaThread hasn't started yet, then the
2819 // priority set in the java.lang.Thread object above will be pushed
2820 // down when it does start.
2821 JVM_END
2822
2823
2824 JVM_LEAF(void, JVM_Yield(JNIEnv *env, jclass threadClass))
2825 HOTSPOT_THREAD_YIELD();
2826 os::naked_yield();
2827 JVM_END
2828
2829 JVM_ENTRY(void, JVM_SleepNanos(JNIEnv* env, jclass threadClass, jlong nanos))
2830 if (nanos < 0) {
2831 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "nanosecond timeout value out of range");
2832 }
2833
2834 if (thread->is_interrupted(true) && !HAS_PENDING_EXCEPTION) {
2835 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2836 }
2837
2838 // Save current thread state and restore it at the end of this block.
2839 // And set new thread state to SLEEPING.
2840 JavaThreadSleepState jtss(thread);
2841
2842 HOTSPOT_THREAD_SLEEP_BEGIN(nanos / NANOSECS_PER_MILLISEC);
2843
2844 if (nanos == 0) {
2845 os::naked_yield();
2846 } else {
2847 ThreadState old_state = thread->osthread()->get_state();
2848 thread->osthread()->set_state(SLEEPING);
2849 if (!thread->sleep_nanos(nanos)) { // interrupted or async exception was installed
2850 // An asynchronous exception could have been thrown on
2851 // us while we were sleeping. We do not overwrite those.
2852 if (!HAS_PENDING_EXCEPTION) {
2853 HOTSPOT_THREAD_SLEEP_END(1);
2854 if (!thread->has_async_exception_condition()) {
2855 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
2856 // to properly restore the thread state. That's likely wrong.
2857 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2858 }
2859 }
2860 }
2861 thread->osthread()->set_state(old_state);
2862 }
2863 HOTSPOT_THREAD_SLEEP_END(0);
2864 JVM_END
2865
2866 JVM_ENTRY(jobject, JVM_CurrentCarrierThread(JNIEnv* env, jclass threadClass))
2867 oop jthread = thread->threadObj();
2868 assert(jthread != nullptr, "no current carrier thread!");
2869 return JNIHandles::make_local(THREAD, jthread);
2870 JVM_END
2871
2872 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
2873 oop theThread = thread->vthread();
2874 assert(theThread != (oop)nullptr, "no current thread!");
2875 return JNIHandles::make_local(THREAD, theThread);
2876 JVM_END
2877
2878 JVM_ENTRY(void, JVM_SetCurrentThread(JNIEnv* env, jobject thisThread,
2879 jobject theThread))
2880 oop threadObj = JNIHandles::resolve(theThread);
2881 thread->set_vthread(threadObj);
2882
2883 // Set _monitor_owner_id of new current Thread
2884 thread->set_monitor_owner_id(java_lang_Thread::thread_id(threadObj));
2885
2886 JFR_ONLY(Jfr::on_set_current_thread(thread, threadObj);)
2887 JVM_END
2888
2889 JVM_ENTRY(jlong, JVM_GetNextThreadIdOffset(JNIEnv* env, jclass threadClass))
2890 return ThreadIdentifier::unsafe_offset();
2891 JVM_END
2892
2893 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
2894 ThreadsListHandle tlh(thread);
2895 JavaThread* receiver = nullptr;
2896 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, nullptr);
2897 if (is_alive) {
2898 // jthread refers to a live JavaThread.
2899 receiver->interrupt();
2900 }
2901 JVM_END
2902
2903 // Return true iff the current thread has locked the object passed in
2904
2905 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
2906 if (obj == nullptr) {
2907 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
2908 }
2909 Handle h_obj(THREAD, JNIHandles::resolve(obj));
2910 return ObjectSynchronizer::current_thread_holds_lock(thread, h_obj);
2911 JVM_END
2912
2913 JVM_ENTRY(jobject, JVM_GetStackTrace(JNIEnv *env, jobject jthread))
2914 oop trace = java_lang_Thread::async_get_stack_trace(jthread, THREAD);
2915 return JNIHandles::make_local(THREAD, trace);
2916 JVM_END
2917
2918 JVM_ENTRY(jobject, JVM_CreateThreadSnapshot(JNIEnv* env, jobject jthread))
2919 #if INCLUDE_JVMTI
2920 oop snapshot = ThreadSnapshotFactory::get_thread_snapshot(jthread, THREAD);
2921 return JNIHandles::make_local(THREAD, snapshot);
2922 #else
2923 THROW_NULL(vmSymbols::java_lang_UnsupportedOperationException());
2924 #endif
2925 JVM_END
2926
2927 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
2928 // We don't use a ThreadsListHandle here because the current thread
2929 // must be alive.
2930 oop java_thread = JNIHandles::resolve_non_null(jthread);
2931 JavaThread* thr = java_lang_Thread::thread(java_thread);
2932 if (thread == thr && !thr->has_attached_via_jni()) {
2933 // Thread naming is only supported for the current thread and
2934 // we don't set the name of an attached thread to avoid stepping
2935 // on other programs.
2936 ResourceMark rm(thread);
2937 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
2938 os::set_native_thread_name(thread_name);
2939 }
2940 JVM_END
2941
2942 JVM_ENTRY(jobject, JVM_ScopedValueCache(JNIEnv* env, jclass threadClass))
2943 oop theCache = thread->scopedValueCache();
2944 return JNIHandles::make_local(THREAD, theCache);
2945 JVM_END
2946
2947 JVM_ENTRY(void, JVM_SetScopedValueCache(JNIEnv* env, jclass threadClass,
2948 jobject theCache))
2949 arrayOop objs = arrayOop(JNIHandles::resolve(theCache));
2950 thread->set_scopedValueCache(objs);
2951 JVM_END
2952
2953
2954 // java.lang.Package ////////////////////////////////////////////////////////////////
2955
2956
2957 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
2958 ResourceMark rm(THREAD);
2959 JvmtiVMObjectAllocEventCollector oam;
2960 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
2961 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
2962 return (jstring) JNIHandles::make_local(THREAD, result);
2963 JVM_END
2964
2965
2966 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
2967 JvmtiVMObjectAllocEventCollector oam;
2968 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
2969 return (jobjectArray) JNIHandles::make_local(THREAD, result);
2970 JVM_END
2971
2972
2973 // java.lang.ref.Reference ///////////////////////////////////////////////////////////////
2974
2975
2976 JVM_ENTRY(jobject, JVM_GetAndClearReferencePendingList(JNIEnv* env))
2977 MonitorLocker ml(Heap_lock);
2978 oop ref = Universe::reference_pending_list();
2979 if (ref != nullptr) {
2980 Universe::clear_reference_pending_list();
2981 }
2982 return JNIHandles::make_local(THREAD, ref);
2983 JVM_END
2984
2985 JVM_ENTRY(jboolean, JVM_HasReferencePendingList(JNIEnv* env))
2986 MonitorLocker ml(Heap_lock);
2987 return Universe::has_reference_pending_list();
2988 JVM_END
2989
2990 JVM_ENTRY(void, JVM_WaitForReferencePendingList(JNIEnv* env))
2991 MonitorLocker ml(Heap_lock);
2992 while (!Universe::has_reference_pending_list()) {
2993 ml.wait();
2994 }
2995 JVM_END
2996
2997 JVM_ENTRY(jobject, JVM_ReferenceGet(JNIEnv* env, jobject ref))
2998 oop ref_oop = JNIHandles::resolve_non_null(ref);
2999 // PhantomReference has its own implementation of get().
3000 assert(!java_lang_ref_Reference::is_phantom(ref_oop), "precondition");
3001 oop referent = java_lang_ref_Reference::weak_referent(ref_oop);
3002 return JNIHandles::make_local(THREAD, referent);
3003 JVM_END
3004
3005 JVM_ENTRY(jboolean, JVM_ReferenceRefersTo(JNIEnv* env, jobject ref, jobject o))
3006 oop ref_oop = JNIHandles::resolve_non_null(ref);
3007 // PhantomReference has its own implementation of refersTo().
3008 // See: JVM_PhantomReferenceRefersTo
3009 assert(!java_lang_ref_Reference::is_phantom(ref_oop), "precondition");
3010 oop referent = java_lang_ref_Reference::weak_referent_no_keepalive(ref_oop);
3011 return referent == JNIHandles::resolve(o);
3012 JVM_END
3013
3014 JVM_ENTRY(void, JVM_ReferenceClear(JNIEnv* env, jobject ref))
3015 oop ref_oop = JNIHandles::resolve_non_null(ref);
3016 // FinalReference has it's own implementation of clear().
3017 assert(!java_lang_ref_Reference::is_final(ref_oop), "precondition");
3018 if (java_lang_ref_Reference::unknown_referent_no_keepalive(ref_oop) == nullptr) {
3019 // If the referent has already been cleared then done.
3020 // However, if the referent is dead but has not yet been cleared by
3021 // concurrent reference processing, it should NOT be cleared here.
3022 // Instead, clearing should be left to the GC. Clearing it here could
3023 // detectably lose an expected notification, which is impossible with
3024 // STW reference processing. The clearing in enqueue() doesn't have
3025 // this problem, since the enqueue covers the notification, but it's not
3026 // worth the effort to handle that case specially.
3027 return;
3028 }
3029 java_lang_ref_Reference::clear_referent(ref_oop);
3030 JVM_END
3031
3032
3033 // java.lang.ref.PhantomReference //////////////////////////////////////////////////
3034
3035
3036 JVM_ENTRY(jboolean, JVM_PhantomReferenceRefersTo(JNIEnv* env, jobject ref, jobject o))
3037 oop ref_oop = JNIHandles::resolve_non_null(ref);
3038 oop referent = java_lang_ref_Reference::phantom_referent_no_keepalive(ref_oop);
3039 return referent == JNIHandles::resolve(o);
3040 JVM_END
3041
3042
3043 // ObjectInputStream ///////////////////////////////////////////////////////////////
3044
3045 // Return the first user-defined class loader up the execution stack, or null
3046 // if only code from the bootstrap or platform class loader is on the stack.
3047
3048 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3049 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3050 InstanceKlass* ik = vfst.method()->method_holder();
3051 oop loader = ik->class_loader();
3052 if (loader != nullptr && !SystemDictionary::is_platform_class_loader(loader)) {
3053 return JNIHandles::make_local(THREAD, loader);
3054 }
3055 }
3056 return nullptr;
3057 JVM_END
3058
3059
3060 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3061
3062
3063 // resolve array handle and check arguments
3064 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3065 if (arr == nullptr) {
3066 THROW_NULL(vmSymbols::java_lang_NullPointerException());
3067 }
3068 oop a = JNIHandles::resolve_non_null(arr);
3069 if (!a->is_array()) {
3070 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3071 } else if (type_array_only && !a->is_typeArray()) {
3072 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array of primitive type");
3073 }
3074 return arrayOop(a);
3075 }
3076
3077
3078 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3079 arrayOop a = check_array(env, arr, false, CHECK_0);
3080 return a->length();
3081 JVM_END
3082
3083
3084 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3085 JvmtiVMObjectAllocEventCollector oam;
3086 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3087 jvalue value;
3088 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3089 oop box = Reflection::box(&value, type, CHECK_NULL);
3090 return JNIHandles::make_local(THREAD, box);
3091 JVM_END
3092
3093
3094 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3095 jvalue value;
3096 value.i = 0; // to initialize value before getting used in CHECK
3097 arrayOop a = check_array(env, arr, true, CHECK_(value));
3098 assert(a->is_typeArray(), "just checking");
3099 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3100 BasicType wide_type = (BasicType) wCode;
3101 if (type != wide_type) {
3102 Reflection::widen(&value, type, wide_type, CHECK_(value));
3103 }
3104 return value;
3105 JVM_END
3106
3107
3108 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3109 arrayOop a = check_array(env, arr, false, CHECK);
3110 oop box = JNIHandles::resolve(val);
3111 jvalue value;
3112 value.i = 0; // to initialize value before getting used in CHECK
3113 BasicType value_type;
3114 if (a->is_objArray()) {
3115 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3116 value_type = Reflection::unbox_for_regular_object(box, &value);
3117 } else {
3118 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3119 }
3120 Reflection::array_set(&value, a, index, value_type, CHECK);
3121 JVM_END
3122
3123
3124 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3125 arrayOop a = check_array(env, arr, true, CHECK);
3126 assert(a->is_typeArray(), "just checking");
3127 BasicType value_type = (BasicType) vCode;
3128 Reflection::array_set(&v, a, index, value_type, CHECK);
3129 JVM_END
3130
3131
3132 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3133 JvmtiVMObjectAllocEventCollector oam;
3134 oop element_mirror = JNIHandles::resolve(eltClass);
3135 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3136 return JNIHandles::make_local(THREAD, result);
3137 JVM_END
3138
3139
3140 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3141 JvmtiVMObjectAllocEventCollector oam;
3142 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3143 oop element_mirror = JNIHandles::resolve(eltClass);
3144 assert(dim_array->is_typeArray(), "just checking");
3145 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3146 return JNIHandles::make_local(THREAD, result);
3147 JVM_END
3148
3149
3150 // Library support ///////////////////////////////////////////////////////////////////////////
3151
3152 JVM_LEAF(void*, JVM_LoadZipLibrary())
3153 return ZipLibrary::handle();
3154 JVM_END
3155
3156 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name, jboolean throwException))
3157 //%note jvm_ct
3158 char ebuf[1024];
3159 void *load_result;
3160 {
3161 ThreadToNativeFromVM ttnfvm(thread);
3162 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3163 }
3164 if (load_result == nullptr) {
3165 if (throwException) {
3166 char msg[1024];
3167 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3168 // Since 'ebuf' may contain a string encoded using
3169 // platform encoding scheme, we need to pass
3170 // Exceptions::unsafe_to_utf8 to the new_exception method
3171 // as the last argument. See bug 6367357.
3172 Handle h_exception =
3173 Exceptions::new_exception(thread,
3174 vmSymbols::java_lang_UnsatisfiedLinkError(),
3175 msg, Exceptions::unsafe_to_utf8);
3176
3177 THROW_HANDLE_NULL(h_exception);
3178 } else {
3179 log_info(library)("Failed to load library %s", name);
3180 return load_result;
3181 }
3182 }
3183 log_info(library)("Loaded library %s, handle " INTPTR_FORMAT, name, p2i(load_result));
3184 return load_result;
3185 JVM_END
3186
3187
3188 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3189 os::dll_unload(handle);
3190 log_info(library)("Unloaded library with handle " INTPTR_FORMAT, p2i(handle));
3191 JVM_END
3192
3193
3194 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3195 void* find_result = os::dll_lookup(handle, name);
3196 log_info(library)("%s %s in library with handle " INTPTR_FORMAT,
3197 find_result != nullptr ? "Found" : "Failed to find",
3198 name, p2i(handle));
3199 return find_result;
3200 JVM_END
3201
3202
3203 // JNI version ///////////////////////////////////////////////////////////////////////////////
3204
3205 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3206 return Threads::is_supported_jni_version_including_1_1(version);
3207 JVM_END
3208
3209
3210 JVM_LEAF(jboolean, JVM_IsPreviewEnabled(void))
3211 return Arguments::enable_preview() ? JNI_TRUE : JNI_FALSE;
3212 JVM_END
3213
3214 JVM_LEAF(jboolean, JVM_IsContinuationsSupported(void))
3215 return VMContinuations ? JNI_TRUE : JNI_FALSE;
3216 JVM_END
3217
3218 JVM_LEAF(jboolean, JVM_IsForeignLinkerSupported(void))
3219 return ForeignGlobals::is_foreign_linker_supported() ? JNI_TRUE : JNI_FALSE;
3220 JVM_END
3221
3222 JVM_LEAF(jboolean, JVM_IsStaticallyLinked(void))
3223 return is_vm_statically_linked() ? JNI_TRUE : JNI_FALSE;
3224 JVM_END
3225
3226 // String support ///////////////////////////////////////////////////////////////////////////
3227
3228 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3229 JvmtiVMObjectAllocEventCollector oam;
3230 if (str == nullptr) return nullptr;
3231 oop string = JNIHandles::resolve_non_null(str);
3232 oop result = StringTable::intern(string, CHECK_NULL);
3233 return (jstring) JNIHandles::make_local(THREAD, result);
3234 JVM_END
3235
3236
3237 // VM Raw monitor support //////////////////////////////////////////////////////////////////////
3238
3239 // VM Raw monitors (not to be confused with JvmtiRawMonitors) are a simple mutual exclusion
3240 // lock (not actually monitors: no wait/notify) that is exported by the VM for use by JDK
3241 // library code. They may be used by JavaThreads and non-JavaThreads and do not participate
3242 // in the safepoint protocol, thread suspension, thread interruption, or most things of that
3243 // nature, except JavaThreads will be blocked by VM_Exit::block_if_vm_exited if the VM has
3244 // shutdown. JavaThreads will be "in native" when using this API from JDK code.
3245
3246
3247 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3248 VM_Exit::block_if_vm_exited();
3268 ((PlatformMutex*) mon)->unlock();
3269 }
3270
3271
3272 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
3273
3274 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init,
3275 Handle loader, jboolean throwError, TRAPS) {
3276 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, throwError != 0, CHECK_NULL);
3277
3278 // Check if we should initialize the class
3279 if (init && klass->is_instance_klass()) {
3280 klass->initialize(CHECK_NULL);
3281 }
3282 return (jclass) JNIHandles::make_local(THREAD, klass->java_mirror());
3283 }
3284
3285
3286 // Method ///////////////////////////////////////////////////////////////////////////////////////////
3287
3288 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
3289 Handle method_handle;
3290 if (thread->stack_overflow_state()->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
3291 method_handle = Handle(THREAD, JNIHandles::resolve(method));
3292 Handle receiver(THREAD, JNIHandles::resolve(obj));
3293 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3294 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
3295 jobject res = JNIHandles::make_local(THREAD, result);
3296 if (JvmtiExport::should_post_vm_object_alloc()) {
3297 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
3298 assert(ret_type != nullptr, "sanity check: ret_type oop must not be null!");
3299 if (java_lang_Class::is_primitive(ret_type)) {
3300 // Only for primitive type vm allocates memory for java object.
3301 // See box() method.
3302 JvmtiExport::post_vm_object_alloc(thread, result);
3303 }
3304 }
3305 return res;
3306 } else {
3307 THROW_NULL(vmSymbols::java_lang_StackOverflowError());
3308 }
3309 JVM_END
3310
3311
3312 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
3313 oop constructor_mirror = JNIHandles::resolve(c);
3314 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3315 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
3316 jobject res = JNIHandles::make_local(THREAD, result);
3317 if (JvmtiExport::should_post_vm_object_alloc()) {
3318 JvmtiExport::post_vm_object_alloc(thread, result);
3319 }
3320 return res;
3321 JVM_END
3322
3323 JVM_ENTRY(void, JVM_InitializeFromArchive(JNIEnv* env, jclass cls))
3324 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
3325 HeapShared::initialize_from_archived_subgraph(THREAD, k);
3326 JVM_END
3327
3328 JVM_ENTRY(void, JVM_RegisterLambdaProxyClassForArchiving(JNIEnv* env,
3329 jclass caller,
3330 jstring interfaceMethodName,
3331 jobject factoryType,
3332 jobject interfaceMethodType,
3333 jobject implementationMember,
3334 jobject dynamicMethodType,
3335 jclass lambdaProxyClass))
3336 #if INCLUDE_CDS
3337 if (!CDSConfig::is_dumping_archive() || !CDSConfig::is_dumping_lambdas_in_legacy_mode()) {
3338 return;
3339 }
3340
3341 InstanceKlass* caller_ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(caller));
3342 if (caller_ik->is_hidden()) {
3343 // Hidden classes not of type lambda proxy classes are currently not being archived.
3344 // If the caller_ik is of one of the above types, the corresponding lambda proxy class won't be
3345 // registered for archiving.
3346 return;
3347 }
3348 InstanceKlass* lambda_ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(lambdaProxyClass));
3354 interface_method_name = java_lang_String::as_symbol(JNIHandles::resolve_non_null(interfaceMethodName));
3355 }
3356 Handle factory_type_oop(THREAD, JNIHandles::resolve_non_null(factoryType));
3357 Symbol* factory_type = java_lang_invoke_MethodType::as_signature(factory_type_oop(), true);
3358
3359 Handle interface_method_type_oop(THREAD, JNIHandles::resolve_non_null(interfaceMethodType));
3360 Symbol* interface_method_type = java_lang_invoke_MethodType::as_signature(interface_method_type_oop(), true);
3361
3362 Handle implementation_member_oop(THREAD, JNIHandles::resolve_non_null(implementationMember));
3363 assert(java_lang_invoke_MemberName::is_method(implementation_member_oop()), "must be");
3364 Method* m = java_lang_invoke_MemberName::vmtarget(implementation_member_oop());
3365
3366 Handle dynamic_method_type_oop(THREAD, JNIHandles::resolve_non_null(dynamicMethodType));
3367 Symbol* dynamic_method_type = java_lang_invoke_MethodType::as_signature(dynamic_method_type_oop(), true);
3368
3369 LambdaProxyClassDictionary::add_lambda_proxy_class(caller_ik, lambda_ik, interface_method_name, factory_type,
3370 interface_method_type, m, dynamic_method_type, THREAD);
3371 #endif // INCLUDE_CDS
3372 JVM_END
3373
3374 JVM_ENTRY(jclass, JVM_LookupLambdaProxyClassFromArchive(JNIEnv* env,
3375 jclass caller,
3376 jstring interfaceMethodName,
3377 jobject factoryType,
3378 jobject interfaceMethodType,
3379 jobject implementationMember,
3380 jobject dynamicMethodType))
3381 #if INCLUDE_CDS
3382
3383 if (interfaceMethodName == nullptr || factoryType == nullptr || interfaceMethodType == nullptr ||
3384 implementationMember == nullptr || dynamicMethodType == nullptr) {
3385 THROW_(vmSymbols::java_lang_NullPointerException(), nullptr);
3386 }
3387
3388 InstanceKlass* caller_ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(caller));
3389 if (!caller_ik->in_aot_cache()) {
3390 // there won't be a shared lambda class if the caller_ik is not in the shared archive.
3391 return nullptr;
3392 }
3393
3394 Symbol* interface_method_name = java_lang_String::as_symbol(JNIHandles::resolve_non_null(interfaceMethodName));
3398 Handle interface_method_type_oop(THREAD, JNIHandles::resolve_non_null(interfaceMethodType));
3399 Symbol* interface_method_type = java_lang_invoke_MethodType::as_signature(interface_method_type_oop(), true);
3400
3401 Handle implementation_member_oop(THREAD, JNIHandles::resolve_non_null(implementationMember));
3402 assert(java_lang_invoke_MemberName::is_method(implementation_member_oop()), "must be");
3403 Method* m = java_lang_invoke_MemberName::vmtarget(implementation_member_oop());
3404
3405 Handle dynamic_method_type_oop(THREAD, JNIHandles::resolve_non_null(dynamicMethodType));
3406 Symbol* dynamic_method_type = java_lang_invoke_MethodType::as_signature(dynamic_method_type_oop(), true);
3407
3408 InstanceKlass* loaded_lambda =
3409 LambdaProxyClassDictionary::load_shared_lambda_proxy_class(caller_ik, interface_method_name, factory_type,
3410 interface_method_type, m, dynamic_method_type,
3411 CHECK_(nullptr));
3412 return loaded_lambda == nullptr ? nullptr : (jclass) JNIHandles::make_local(THREAD, loaded_lambda->java_mirror());
3413 #else
3414 return nullptr;
3415 #endif // INCLUDE_CDS
3416 JVM_END
3417
3418 JVM_ENTRY_NO_ENV(jlong, JVM_GetRandomSeedForDumping())
3419 if (CDSConfig::is_dumping_static_archive()) {
3420 // We do this so that the default CDS archive can be deterministic.
3421 const char* release = VM_Version::vm_release();
3422 const char* dbg_level = VM_Version::jdk_debug_level();
3423 const char* version = VM_Version::internal_vm_info_string();
3424 jlong seed = (jlong)(java_lang_String::hash_code((const jbyte*)release, (int)strlen(release)) ^
3425 java_lang_String::hash_code((const jbyte*)dbg_level, (int)strlen(dbg_level)) ^
3426 java_lang_String::hash_code((const jbyte*)version, (int)strlen(version)));
3427 seed += (jlong)VM_Version::vm_major_version();
3428 seed += (jlong)VM_Version::vm_minor_version();
3429 seed += (jlong)VM_Version::vm_security_version();
3430 seed += (jlong)VM_Version::vm_patch_version();
3431 if (seed == 0) { // don't let this ever be zero.
3432 seed = 0x87654321;
3433 }
3434 log_debug(aot)("JVM_GetRandomSeedForDumping() = " JLONG_FORMAT, seed);
3435 return seed;
3436 } else {
3437 return 0;
3438 }
3439 JVM_END
3440
3441 JVM_ENTRY_NO_ENV(jint, JVM_GetCDSConfigStatus())
3442 return CDSConfig::get_status();
3443 JVM_END
3444
3445 JVM_ENTRY(void, JVM_LogLambdaFormInvoker(JNIEnv *env, jstring line))
3446 #if INCLUDE_CDS
3447 assert(CDSConfig::is_logging_lambda_form_invokers(), "sanity");
3448 if (line != nullptr) {
3449 ResourceMark rm(THREAD);
3450 Handle h_line (THREAD, JNIHandles::resolve_non_null(line));
3451 char* c_line = java_lang_String::as_utf8_string(h_line());
3452 if (CDSConfig::is_dumping_dynamic_archive()) {
3453 // Note: LambdaFormInvokers::append take same format which is not
3454 // same as below the print format. The line does not include LAMBDA_FORM_TAG.
3455 LambdaFormInvokers::append(os::strdup((const char*)c_line, mtInternal));
3456 }
3457 if (ClassListWriter::is_enabled()) {
3458 ClassListWriter w;
3459 w.stream()->print_cr("%s %s", ClassListParser::lambda_form_tag(), c_line);
3460 }
3461 }
3462 #endif // INCLUDE_CDS
3463 JVM_END
3464
3465 JVM_ENTRY(void, JVM_DumpClassListToFile(JNIEnv *env, jstring listFileName))
3466 #if INCLUDE_CDS
3467 ResourceMark rm(THREAD);
3468 Handle file_handle(THREAD, JNIHandles::resolve_non_null(listFileName));
3469 char* file_name = java_lang_String::as_utf8_string(file_handle());
3470 AOTMetaspace::dump_loaded_classes(file_name, THREAD);
3471 #endif // INCLUDE_CDS
3472 JVM_END
3473
3474 JVM_ENTRY(void, JVM_DumpDynamicArchive(JNIEnv *env, jstring archiveName))
3475 #if INCLUDE_CDS
3476 ResourceMark rm(THREAD);
3477 Handle file_handle(THREAD, JNIHandles::resolve_non_null(archiveName));
3478 char* archive_name = java_lang_String::as_utf8_string(file_handle());
3479 DynamicArchive::dump_for_jcmd(archive_name, CHECK);
3480 #endif // INCLUDE_CDS
3481 JVM_END
3482
3483 JVM_ENTRY(jboolean, JVM_NeedsClassInitBarrierForCDS(JNIEnv* env, jclass cls))
3484 #if INCLUDE_CDS
3485 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
3486 if (!k->is_instance_klass()) {
3487 return false;
3488 } else {
3489 if (InstanceKlass::cast(k)->is_enum_subclass() ||
3490 AOTClassInitializer::can_archive_initialized_mirror(InstanceKlass::cast(k))) {
3491 // This class will be cached in AOT-initialized state. No need for init barriers.
3492 return false;
3493 } else {
3494 // If we cannot cache the class in AOT-initialized state, java.lang.invoke handles
3495 // must emit barriers to ensure class initialization during production run.
3496 ResourceMark rm(THREAD);
3497 log_debug(aot)("NeedsClassInitBarrierForCDS: %s", k->external_name());
3498 return true;
3499 }
3500 }
3501 #else
3502 return false;
3503 #endif // INCLUDE_CDS
3504 JVM_END
3505
3506 // Returns an array of all live Thread objects (VM internal JavaThreads,
3507 // jvmti agent threads, and JNI attaching threads are skipped)
3508 // See CR 6404306 regarding JNI attaching threads
3509 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
3510 ResourceMark rm(THREAD);
3511 ThreadsListEnumerator tle(THREAD, false, false);
3512 JvmtiVMObjectAllocEventCollector oam;
3513
3514 int num_threads = tle.num_threads();
3515 objArrayOop r = oopFactory::new_objArray(vmClasses::Thread_klass(), num_threads, CHECK_NULL);
3516 objArrayHandle threads_ah(THREAD, r);
3517
3518 for (int i = 0; i < num_threads; i++) {
3519 Handle h = tle.get_threadObj(i);
3520 threads_ah->obj_at_put(i, h());
3521 }
3522
3523 return (jobjectArray) JNIHandles::make_local(THREAD, threads_ah());
3524 JVM_END
3525
3526
3527 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
3528 // Return StackTraceElement[][], each element is the stack trace of a thread in
3529 // the corresponding entry in the given threads array
3530 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
3531 JvmtiVMObjectAllocEventCollector oam;
3532
3533 // Check if threads is null
3534 if (threads == nullptr) {
3535 THROW_NULL(vmSymbols::java_lang_NullPointerException());
3536 }
3537
3538 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
3539 objArrayHandle ah(THREAD, a);
3540 int num_threads = ah->length();
3541 // check if threads is non-empty array
3542 if (num_threads == 0) {
3543 THROW_NULL(vmSymbols::java_lang_IllegalArgumentException());
3544 }
3545
3546 // check if threads is not an array of objects of Thread class
3547 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
3548 if (k != vmClasses::Thread_klass()) {
3549 THROW_NULL(vmSymbols::java_lang_IllegalArgumentException());
3550 }
3551
3552 ResourceMark rm(THREAD);
3553
3554 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
3555 for (int i = 0; i < num_threads; i++) {
3556 oop thread_obj = ah->obj_at(i);
3557 instanceHandle h(THREAD, (instanceOop) thread_obj);
3558 thread_handle_array->append(h);
3559 }
3560
3561 // The JavaThread references in thread_handle_array are validated
3562 // in VM_ThreadDump::doit().
3563 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
3564 return (jobjectArray)JNIHandles::make_local(THREAD, stacktraces());
3565
3566 JVM_END
3567
3568 // JVM monitoring and management support
3569 JVM_LEAF(void*, JVM_GetManagement(jint version))
3570 return Management::get_jmm_interface(version);
3571 JVM_END
3572
3573 // com.sun.tools.attach.VirtualMachine agent properties support
3574 //
3575 // Initialize the agent properties with the properties maintained in the VM
3576 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
3577 ResourceMark rm;
3578
3579 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
3580
3581 PUTPROP(props, "sun.java.command", Arguments::java_command());
3582 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
3583 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
3584 return properties;
3585 JVM_END
3586
3587 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
3588 {
3589 JvmtiVMObjectAllocEventCollector oam;
3590
3591 if (ofClass == nullptr) {
3592 return nullptr;
3593 }
3594 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
3595 // Special handling for primitive objects
3596 if (java_lang_Class::is_primitive(mirror())) {
3597 return nullptr;
3598 }
3599 Klass* k = java_lang_Class::as_Klass(mirror());
3600 if (!k->is_instance_klass()) {
3601 return nullptr;
3602 }
3603 InstanceKlass* ik = InstanceKlass::cast(k);
3604 int encl_method_class_idx = ik->enclosing_method_class_index();
3605 if (encl_method_class_idx == 0) {
3606 return nullptr;
3607 }
3610 Klass* enc_k = ik->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
3611 dest->obj_at_put(0, enc_k->java_mirror());
3612 int encl_method_method_idx = ik->enclosing_method_method_index();
3613 if (encl_method_method_idx != 0) {
3614 Symbol* sym = ik->constants()->symbol_at(
3615 extract_low_short_from_int(
3616 ik->constants()->name_and_type_at(encl_method_method_idx)));
3617 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3618 dest->obj_at_put(1, str());
3619 sym = ik->constants()->symbol_at(
3620 extract_high_short_from_int(
3621 ik->constants()->name_and_type_at(encl_method_method_idx)));
3622 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3623 dest->obj_at_put(2, str());
3624 }
3625 return (jobjectArray) JNIHandles::make_local(THREAD, dest());
3626 }
3627 JVM_END
3628
3629 // Returns an array of java.lang.String objects containing the input arguments to the VM.
3630 JVM_ENTRY(jobjectArray, JVM_GetVmArguments(JNIEnv *env))
3631 ResourceMark rm(THREAD);
3632
3633 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) {
3634 return nullptr;
3635 }
3636
3637 char** vm_flags = Arguments::jvm_flags_array();
3638 char** vm_args = Arguments::jvm_args_array();
3639 int num_flags = Arguments::num_jvm_flags();
3640 int num_args = Arguments::num_jvm_args();
3641
3642 InstanceKlass* ik = vmClasses::String_klass();
3643 objArrayOop r = oopFactory::new_objArray(ik, num_args + num_flags, CHECK_NULL);
3644 objArrayHandle result_h(THREAD, r);
3645
3646 int index = 0;
3647 for (int j = 0; j < num_flags; j++, index++) {
3648 Handle h = java_lang_String::create_from_platform_dependent_str(vm_flags[j], CHECK_NULL);
3649 result_h->obj_at_put(index, h());
3650 }
3651 for (int i = 0; i < num_args; i++, index++) {
3652 Handle h = java_lang_String::create_from_platform_dependent_str(vm_args[i], CHECK_NULL);
3653 result_h->obj_at_put(index, h());
3654 }
3655 return (jobjectArray) JNIHandles::make_local(THREAD, result_h());
3656 JVM_END
3657
3658 JVM_LEAF(jint, JVM_FindSignal(const char *name))
3659 return os::get_signal_number(name);
3660 JVM_END
3661
3662 JVM_ENTRY(void, JVM_VirtualThreadEndFirstTransition(JNIEnv* env, jobject vthread))
3663 oop vt = JNIHandles::resolve_external_guard(vthread);
3664 MountUnmountDisabler::end_transition(thread, vt, true /*is_mount*/, true /*is_thread_start*/);
3665 JVM_END
3666
3667 JVM_ENTRY(void, JVM_VirtualThreadStartFinalTransition(JNIEnv* env, jobject vthread))
3668 oop vt = JNIHandles::resolve_external_guard(vthread);
3669 MountUnmountDisabler::start_transition(thread, vt, false /*is_mount */, true /*is_thread_end*/);
3670 JVM_END
3671
3672 JVM_ENTRY(void, JVM_VirtualThreadStartTransition(JNIEnv* env, jobject vthread, jboolean is_mount))
3673 oop vt = JNIHandles::resolve_external_guard(vthread);
3674 MountUnmountDisabler::start_transition(thread, vt, is_mount, false /*is_thread_end*/);
3675 JVM_END
3676
3677 JVM_ENTRY(void, JVM_VirtualThreadEndTransition(JNIEnv* env, jobject vthread, jboolean is_mount))
3678 oop vt = JNIHandles::resolve_external_guard(vthread);
3679 MountUnmountDisabler::end_transition(thread, vt, is_mount, false /*is_thread_start*/);
3680 JVM_END
3681
3682 // Notification from VirtualThread about disabling JVMTI Suspend in a sync critical section.
3683 // Needed to avoid deadlocks with JVMTI suspend mechanism.
3684 JVM_ENTRY(void, JVM_VirtualThreadDisableSuspend(JNIEnv* env, jclass clazz, jboolean enter))
3685 #if INCLUDE_JVMTI
3686 if (!DoJVMTIVirtualThreadTransitions) {
3687 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
3688 return;
3689 }
3690 assert(thread->is_disable_suspend() != (bool)enter,
3691 "nested or unbalanced monitor enter/exit is not allowed");
3692 thread->toggle_is_disable_suspend();
3693 #endif
3694 JVM_END
3695
3696 JVM_ENTRY(void, JVM_VirtualThreadPinnedEvent(JNIEnv* env, jclass ignored, jstring op))
3697 #if INCLUDE_JFR
3698 freeze_result result = THREAD->last_freeze_fail_result();
3699 assert(result != freeze_ok, "sanity check");
3700 EventVirtualThreadPinned event(UNTIMED);
3701 event.set_starttime(THREAD->last_freeze_fail_time());
3702 if (event.should_commit()) {
3703 ResourceMark rm(THREAD);
3704 const char *str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(op));
3705 THREAD->post_vthread_pinned_event(&event, str, result);
3706 }
3707 #endif
3708 JVM_END
3709
3710 JVM_ENTRY(jobject, JVM_TakeVirtualThreadListToUnblock(JNIEnv* env, jclass ignored))
3711 ParkEvent* parkEvent = ObjectMonitor::vthread_unparker_ParkEvent();
3712 assert(parkEvent != nullptr, "not initialized");
3713
3714 OopHandle& list_head = ObjectMonitor::vthread_list_head();
3715 oop vthread_head = nullptr;
3716 while (true) {
3717 if (list_head.peek() != nullptr) {
3718 for (;;) {
3719 oop head = list_head.resolve();
3720 if (list_head.cmpxchg(head, nullptr) == head) {
3721 return JNIHandles::make_local(THREAD, head);
3722 }
3723 }
3724 }
3725 ThreadBlockInVM tbivm(THREAD);
3726 parkEvent->park();
3727 }
3728 JVM_END
3729
3730 /*
3731 * Return the current class's class file version. The low order 16 bits of the
3732 * returned jint contain the class's major version. The high order 16 bits
3733 * contain the class's minor version.
3734 */
3735 JVM_ENTRY(jint, JVM_GetClassFileVersion(JNIEnv* env, jclass current))
3736 oop mirror = JNIHandles::resolve_non_null(current);
3737 if (java_lang_Class::is_primitive(mirror)) {
3738 // return latest major version and minor version of 0.
3739 return JVM_CLASSFILE_MAJOR_VERSION;
3740 }
3741 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(mirror);
3742 return (ik->minor_version() << 16) | ik->major_version();
3743 JVM_END
3744
3745 /*
3746 * Ensure that code doing a stackwalk and using javaVFrame::locals() to
3747 * get the value will see a materialized value and not a scalar-replaced
3748 * null value.
3749 */
3750 JVM_ENTRY(void, JVM_EnsureMaterializedForStackWalk_func(JNIEnv* env, jobject vthread, jobject value))
3751 JVM_EnsureMaterializedForStackWalk(env, value);
3752 JVM_END
3753
3754 /*
3755 * Return JNI_TRUE if warnings are printed when agents are dynamically loaded.
3756 */
3757 JVM_LEAF(jboolean, JVM_PrintWarningAtDynamicAgentLoad(void))
3758 return (EnableDynamicAgentLoading && !FLAG_IS_CMDLINE(EnableDynamicAgentLoading)) ? JNI_TRUE : JNI_FALSE;
3759 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"
71 #include "prims/jvmtiExport.hpp"
72 #include "prims/jvmtiThreadState.inline.hpp"
73 #include "prims/stackwalk.hpp"
74 #include "runtime/arguments.hpp"
75 #include "runtime/atomicAccess.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/mountUnmountDisabler.hpp"
89 #include "runtime/os.inline.hpp"
90 #include "runtime/osThread.hpp"
91 #include "runtime/perfData.inline.hpp"
92 #include "runtime/reflection.hpp"
93 #include "runtime/synchronizer.hpp"
94 #include "runtime/threadIdentifier.hpp"
95 #include "runtime/threadSMR.hpp"
96 #include "runtime/vframe.inline.hpp"
97 #include "runtime/vm_version.hpp"
98 #include "runtime/vmOperations.hpp"
99 #include "services/attachListener.hpp"
100 #include "services/management.hpp"
101 #include "services/threadService.hpp"
102 #include "utilities/checkedCast.hpp"
103 #include "utilities/copy.hpp"
104 #include "utilities/defaultStream.hpp"
105 #include "utilities/dtrace.hpp"
106 #include "utilities/events.hpp"
107 #include "utilities/macros.hpp"
108 #include "utilities/utf8.hpp"
109 #include "utilities/zipLibrary.hpp"
110 #if INCLUDE_CDS
111 #include "classfile/systemDictionaryShared.hpp"
224 }
225 }
226 }
227
228 // java.lang.System //////////////////////////////////////////////////////////////////////
229
230 JVM_ENTRY(jboolean, JVM_AOTEndRecording(JNIEnv *env))
231 #if INCLUDE_CDS
232 if (CDSConfig::is_dumping_preimage_static_archive()) {
233 if (!AOTMetaspace::preimage_static_archive_dumped()) {
234 AOTMetaspace::dump_static_archive(THREAD);
235 return JNI_TRUE;
236 }
237 }
238 return JNI_FALSE;
239 #else
240 return JNI_FALSE;
241 #endif // INCLUDE_CDS
242 JVM_END
243
244 JVM_LEAF_PROF(jlong, JVM_CurrentTimeMillis, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
245 return os::javaTimeMillis();
246 JVM_END
247
248 JVM_LEAF_PROF(jlong, JVM_NanoTime, JVM_NanoTime(JNIEnv *env, jclass ignored))
249 return os::javaTimeNanos();
250 JVM_END
251
252 // The function below is actually exposed by jdk.internal.misc.VM and not
253 // java.lang.System, but we choose to keep it here so that it stays next
254 // to JVM_CurrentTimeMillis and JVM_NanoTime
255
256 const jlong MAX_DIFF_SECS = CONST64(0x0100000000); // 2^32
257 const jlong MIN_DIFF_SECS = -MAX_DIFF_SECS; // -2^32
258
259 JVM_LEAF_PROF(jlong, JVM_GetNanoTimeAdjustment, JVM_GetNanoTimeAdjustment(JNIEnv *env, jclass ignored, jlong offset_secs))
260 jlong seconds;
261 jlong nanos;
262
263 os::javaTimeSystemUTC(seconds, nanos);
264
265 // We're going to verify that the result can fit in a long.
266 // For that we need the difference in seconds between 'seconds'
267 // and 'offset_secs' to be such that:
268 // |seconds - offset_secs| < (2^63/10^9)
269 // We're going to approximate 10^9 ~< 2^30 (1000^3 ~< 1024^3)
270 // which makes |seconds - offset_secs| < 2^33
271 // and we will prefer +/- 2^32 as the maximum acceptable diff
272 // as 2^32 has a more natural feel than 2^33...
273 //
274 // So if |seconds - offset_secs| >= 2^32 - we return a special
275 // sentinel value (-1) which the caller should take as an
276 // exception value indicating that the offset given to us is
277 // too far from range of the current time - leading to too big
278 // a nano adjustment. The caller is expected to recover by
279 // computing a more accurate offset and calling this method
280 // again. (For the record 2^32 secs is ~136 years, so that
281 // should rarely happen)
282 //
283 jlong diff = seconds - offset_secs;
284 if (diff >= MAX_DIFF_SECS || diff <= MIN_DIFF_SECS) {
285 return -1; // sentinel value: the offset is too far off the target
286 }
287
288 // return the adjustment. If you compute a time by adding
289 // this number of nanoseconds along with the number of seconds
290 // in the offset you should get the current UTC time.
291 return (diff * (jlong)1000000000) + nanos;
292 JVM_END
293
294 JVM_ENTRY_PROF(void, JVM_ArrayCopy, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
295 jobject dst, jint dst_pos, jint length))
296 // Check if we have null pointers
297 if (src == nullptr || dst == nullptr) {
298 THROW(vmSymbols::java_lang_NullPointerException());
299 }
300 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
301 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
302 assert(oopDesc::is_oop(s), "JVM_ArrayCopy: src not an oop");
303 assert(oopDesc::is_oop(d), "JVM_ArrayCopy: dst not an oop");
304 // Do copy
305 s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread);
306 JVM_END
307
308
309 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
310 JavaValue r(T_OBJECT);
311 // public synchronized Object put(Object key, Object value);
312 HandleMark hm(THREAD);
313 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK);
314 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != nullptr ? value : ""), CHECK);
315 JavaCalls::call_virtual(&r,
316 props,
317 vmClasses::Properties_klass(),
318 vmSymbols::put_name(),
319 vmSymbols::object_object_object_signature(),
320 key_str,
321 value_str,
322 THREAD);
323 }
324
325
326 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
327
328 /*
329 * Return all of the system properties in a Java String array with alternating
330 * names and values from the jvm SystemProperty.
331 * Which includes some internal and all commandline -D defined properties.
332 */
333 JVM_ENTRY_PROF(jobjectArray, JVM_GetProperties, JVM_GetProperties(JNIEnv *env))
334 ResourceMark rm(THREAD);
335 HandleMark hm(THREAD);
336 int ndx = 0;
337 int fixedCount = 2;
338
339 SystemProperty* p = Arguments::system_properties();
340 int count = Arguments::PropertyList_count(p);
341
342 // Allocate result String array
343 InstanceKlass* ik = vmClasses::String_klass();
344 objArrayOop r = oopFactory::new_objArray(ik, (count + fixedCount) * 2, CHECK_NULL);
345 objArrayHandle result_h(THREAD, r);
346
347 while (p != nullptr) {
348 const char * key = p->key();
349 if (strcmp(key, "sun.nio.MaxDirectMemorySize") != 0) {
350 const char * value = p->value();
351 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK_NULL);
352 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != nullptr ? value : ""), CHECK_NULL);
353 result_h->obj_at_put(ndx * 2, key_str());
401 Handle key_str = java_lang_String::create_from_platform_dependent_str("sun.management.compiler", CHECK_NULL);
402 Handle value_str = java_lang_String::create_from_platform_dependent_str(compiler_name, CHECK_NULL);
403 result_h->obj_at_put(ndx * 2, key_str());
404 result_h->obj_at_put(ndx * 2 + 1, value_str());
405 ndx++;
406 }
407 }
408
409 return (jobjectArray) JNIHandles::make_local(THREAD, result_h());
410 JVM_END
411
412
413 /*
414 * Return the temporary directory that the VM uses for the attach
415 * and perf data files.
416 *
417 * It is important that this directory is well-known and the
418 * same for all VM instances. It cannot be affected by configuration
419 * variables such as java.io.tmpdir.
420 */
421 JVM_ENTRY_PROF(jstring, JVM_GetTemporaryDirectory, JVM_GetTemporaryDirectory(JNIEnv *env))
422 HandleMark hm(THREAD);
423 const char* temp_dir = os::get_temp_directory();
424 Handle h = java_lang_String::create_from_platform_dependent_str(temp_dir, CHECK_NULL);
425 return (jstring) JNIHandles::make_local(THREAD, h());
426 JVM_END
427
428
429 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
430
431 extern volatile jint vm_created;
432
433 JVM_ENTRY_NO_ENV_PROF(void, JVM_BeforeHalt, JVM_BeforeHalt())
434 EventShutdown event;
435 if (event.should_commit()) {
436 event.set_reason("Shutdown requested from Java");
437 event.commit();
438 }
439 JVM_END
440
441
442 JVM_ENTRY_NO_ENV_PROF(void, JVM_Halt, JVM_Halt(jint code))
443 before_exit(thread, true);
444 vm_exit(code);
445 JVM_END
446
447
448 JVM_ENTRY_NO_ENV_PROF(void, JVM_GC, JVM_GC(void))
449 if (!DisableExplicitGC) {
450 EventSystemGC event;
451 event.set_invokedConcurrent(ExplicitGCInvokesConcurrent);
452 Universe::heap()->collect(GCCause::_java_lang_system_gc);
453 event.commit();
454 }
455 JVM_END
456
457
458 JVM_LEAF_PROF(jlong, JVM_MaxObjectInspectionAge, JVM_MaxObjectInspectionAge(void))
459 return Universe::heap()->millis_since_last_whole_heap_examined();
460 JVM_END
461
462
463 static inline jlong convert_size_t_to_jlong(size_t val) {
464 // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
465 NOT_LP64 (return (jlong)val;)
466 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
467 }
468
469 JVM_ENTRY_NO_ENV_PROF(jlong, JVM_TotalMemory, JVM_TotalMemory(void))
470 size_t n = Universe::heap()->capacity();
471 return convert_size_t_to_jlong(n);
472 JVM_END
473
474
475 JVM_ENTRY_NO_ENV_PROF(jlong, JVM_FreeMemory, JVM_FreeMemory(void))
476 size_t n = Universe::heap()->unused();
477 return convert_size_t_to_jlong(n);
478 JVM_END
479
480
481 JVM_ENTRY_NO_ENV_PROF(jlong, JVM_MaxMemory, JVM_MaxMemory(void))
482 size_t n = Universe::heap()->max_capacity();
483 return convert_size_t_to_jlong(n);
484 JVM_END
485
486
487 JVM_ENTRY_NO_ENV_PROF(jint, JVM_ActiveProcessorCount, JVM_ActiveProcessorCount(void))
488 return os::active_processor_count();
489 JVM_END
490
491 JVM_LEAF_PROF(jboolean, JVM_IsUseContainerSupport, JVM_IsUseContainerSupport(void))
492 #ifdef LINUX
493 if (UseContainerSupport) {
494 return JNI_TRUE;
495 }
496 #endif
497 return JNI_FALSE;
498 JVM_END
499
500 JVM_LEAF(jboolean, JVM_IsContainerized(void))
501 if (os::is_containerized()) {
502 return JNI_TRUE;
503 }
504 return JNI_FALSE;
505 JVM_END
506
507 // java.lang.Throwable //////////////////////////////////////////////////////
508
509 JVM_ENTRY_PROF(void, JVM_FillInStackTrace, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
510 Handle exception(thread, JNIHandles::resolve_non_null(receiver));
511 java_lang_Throwable::fill_in_stack_trace(exception);
512 JVM_END
513
514 // java.lang.NullPointerException ///////////////////////////////////////////
515
516 JVM_ENTRY_PROF(jstring, JVM_GetExtendedNPEMessage, JVM_GetExtendedNPEMessage(JNIEnv *env, jthrowable throwable))
517 if (!ShowCodeDetailsInExceptionMessages) return nullptr;
518
519 oop exc = JNIHandles::resolve_non_null(throwable);
520
521 Method* method;
522 int bci;
523 if (!java_lang_Throwable::get_top_method_and_bci(exc, &method, &bci)) {
524 return nullptr;
525 }
526 if (method->is_native()) {
527 return nullptr;
528 }
529
530 stringStream ss;
531 bool ok = BytecodeUtils::get_NPE_message_at(&ss, method, bci);
532 if (ok) {
533 oop result = java_lang_String::create_oop_from_str(ss.base(), CHECK_NULL);
534 return (jstring) JNIHandles::make_local(THREAD, result);
535 } else {
536 return nullptr;
537 }
538 JVM_END
539
540 // java.lang.StackTraceElement //////////////////////////////////////////////
541
542
543 JVM_ENTRY_PROF(void, JVM_InitStackTraceElementArray, JVM_InitStackTraceElementArray(JNIEnv *env, jobjectArray elements, jobject backtrace, jint depth))
544 Handle backtraceh(THREAD, JNIHandles::resolve(backtrace));
545 objArrayOop st = objArrayOop(JNIHandles::resolve(elements));
546 objArrayHandle stack_trace(THREAD, st);
547 // Fill in the allocated stack trace
548 java_lang_Throwable::get_stack_trace_elements(depth, backtraceh, stack_trace, CHECK);
549 JVM_END
550
551
552 JVM_ENTRY_PROF(void, JVM_InitStackTraceElement, JVM_InitStackTraceElement(JNIEnv* env, jobject element, jobject stackFrameInfo))
553 Handle stack_frame_info(THREAD, JNIHandles::resolve_non_null(stackFrameInfo));
554 Handle stack_trace_element(THREAD, JNIHandles::resolve_non_null(element));
555 java_lang_StackFrameInfo::to_stack_trace_element(stack_frame_info, stack_trace_element, CHECK);
556 JVM_END
557
558
559 // java.lang.StackWalker //////////////////////////////////////////////////////
560 JVM_ENTRY_PROF(void, JVM_ExpandStackFrameInfo, JVM_ExpandStackFrameInfo(JNIEnv *env, jobject obj))
561 Handle stack_frame_info(THREAD, JNIHandles::resolve_non_null(obj));
562
563 bool have_name = (java_lang_StackFrameInfo::name(stack_frame_info()) != nullptr);
564 bool have_type = (java_lang_StackFrameInfo::type(stack_frame_info()) != nullptr);
565 Method* method = java_lang_StackFrameInfo::get_method(stack_frame_info());
566 if (!have_name) {
567 oop name = StringTable::intern(method->name(), CHECK);
568 java_lang_StackFrameInfo::set_name(stack_frame_info(), name);
569 }
570 if (!have_type) {
571 Handle type = java_lang_String::create_from_symbol(method->signature(), CHECK);
572 java_lang_StackFrameInfo::set_type(stack_frame_info(), type());
573 }
574 JVM_END
575
576 JVM_ENTRY_PROF(jobject, JVM_CallStackWalk, JVM_CallStackWalk(JNIEnv *env, jobject stackStream, jint mode,
577 jint skip_frames, jobject contScope, jobject cont,
578 jint buffer_size, jint start_index, jobjectArray frames))
579 if (!thread->has_last_Java_frame()) {
580 THROW_MSG_(vmSymbols::java_lang_InternalError(), "doStackWalk: no stack trace", nullptr);
581 }
582
583 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
584 Handle contScope_h(THREAD, JNIHandles::resolve(contScope));
585 Handle cont_h(THREAD, JNIHandles::resolve(cont));
586 // frames array is a ClassFrameInfo[] array when only getting caller reference,
587 // and a StackFrameInfo[] array (or derivative) otherwise. It should never
588 // be null.
589 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
590 objArrayHandle frames_array_h(THREAD, fa);
591
592 if (frames_array_h->length() < buffer_size) {
593 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers", nullptr);
594 }
595
596 oop result = StackWalk::walk(stackStream_h, mode, skip_frames, contScope_h, cont_h,
597 buffer_size, start_index, frames_array_h, CHECK_NULL);
598 return JNIHandles::make_local(THREAD, result);
599 JVM_END
600
601
602 JVM_ENTRY_PROF(jint, JVM_MoreStackWalk, JVM_MoreStackWalk(JNIEnv *env, jobject stackStream, jint mode, jlong anchor,
603 jint last_batch_count, jint buffer_size, jint start_index,
604 jobjectArray frames))
605 // frames array is a ClassFrameInfo[] array when only getting caller reference,
606 // and a StackFrameInfo[] array (or derivative) otherwise. It should never
607 // be null.
608 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
609 objArrayHandle frames_array_h(THREAD, fa);
610
611 if (frames_array_h->length() < buffer_size) {
612 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers");
613 }
614
615 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
616 return StackWalk::fetchNextBatch(stackStream_h, mode, anchor, last_batch_count, buffer_size,
617 start_index, frames_array_h, THREAD);
618 JVM_END
619
620 JVM_ENTRY_PROF(void, JVM_SetStackWalkContinuation, JVM_SetStackWalkContinuation(JNIEnv *env, jobject stackStream, jlong anchor, jobjectArray frames, jobject cont))
621 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
622 objArrayHandle frames_array_h(THREAD, fa);
623 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
624 Handle cont_h(THREAD, JNIHandles::resolve_non_null(cont));
625
626 StackWalk::setContinuation(stackStream_h, anchor, frames_array_h, cont_h, THREAD);
627 JVM_END
628
629 // java.lang.Object ///////////////////////////////////////////////
630
631
632 JVM_ENTRY_PROF(jint, JVM_IHashCode, JVM_IHashCode(JNIEnv* env, jobject handle))
633 // as implemented in the classic virtual machine; return 0 if object is null
634 return handle == nullptr ? 0 :
635 checked_cast<jint>(ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)));
636 JVM_END
637
638
639 JVM_ENTRY_PROF(void, JVM_MonitorWait, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
640 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
641 ObjectSynchronizer::wait(obj, ms, CHECK);
642 JVM_END
643
644
645 JVM_ENTRY_PROF(void, JVM_MonitorNotify, JVM_MonitorNotify(JNIEnv* env, jobject handle))
646 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
647 ObjectSynchronizer::notify(obj, CHECK);
648 JVM_END
649
650
651 JVM_ENTRY_PROF(void, JVM_MonitorNotifyAll, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
652 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
653 ObjectSynchronizer::notifyall(obj, CHECK);
654 JVM_END
655
656
657 JVM_ENTRY_PROF(jobject, JVM_Clone, JVM_Clone(JNIEnv* env, jobject handle))
658 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
659 Klass* klass = obj->klass();
660 JvmtiVMObjectAllocEventCollector oam;
661
662 #ifdef ASSERT
663 // Just checking that the cloneable flag is set correct
664 if (obj->is_array()) {
665 guarantee(klass->is_cloneable(), "all arrays are cloneable");
666 } else {
667 guarantee(obj->is_instance(), "should be instanceOop");
668 bool cloneable = klass->is_subtype_of(vmClasses::Cloneable_klass());
669 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
670 }
671 #endif
672
673 // Check if class of obj supports the Cloneable interface.
674 // All arrays are considered to be cloneable (See JLS 20.1.5).
675 // All j.l.r.Reference classes are considered non-cloneable.
676 if (!klass->is_cloneable() ||
677 (klass->is_instance_klass() &&
690 } else {
691 new_obj_oop = Universe::heap()->obj_allocate(klass, size, CHECK_NULL);
692 }
693
694 HeapAccess<>::clone(obj(), new_obj_oop, size);
695
696 Handle new_obj(THREAD, new_obj_oop);
697 // Caution: this involves a java upcall, so the clone should be
698 // "gc-robust" by this stage.
699 if (klass->has_finalizer()) {
700 assert(obj->is_instance(), "should be instanceOop");
701 new_obj_oop = InstanceKlass::register_finalizer(instanceOop(new_obj()), CHECK_NULL);
702 new_obj = Handle(THREAD, new_obj_oop);
703 }
704
705 return JNIHandles::make_local(THREAD, new_obj());
706 JVM_END
707
708 // java.lang.ref.Finalizer ////////////////////////////////////////////////////
709
710 JVM_ENTRY_PROF(void, JVM_ReportFinalizationComplete, JVM_ReportFinalizationComplete(JNIEnv * env, jobject finalizee))
711 MANAGEMENT_ONLY(FinalizerService::on_complete(JNIHandles::resolve_non_null(finalizee), THREAD);)
712 JVM_END
713
714 JVM_LEAF_PROF(jboolean, JVM_IsFinalizationEnabled, JVM_IsFinalizationEnabled(JNIEnv * env))
715 return InstanceKlass::is_finalization_enabled();
716 JVM_END
717
718 // jdk.internal.vm.Continuation /////////////////////////////////////////////////////
719
720 JVM_ENTRY_PROF(void, JVM_RegisterContinuationMethods, JVM_RegisterContinuationMethods(JNIEnv *env, jclass cls))
721 CONT_RegisterNativeMethods(env, cls);
722 JVM_END
723
724 // java.io.File ///////////////////////////////////////////////////////////////
725
726 JVM_LEAF_PROF(char*, JVM_NativePath, JVM_NativePath(char* path))
727 return os::native_path(path);
728 JVM_END
729
730
731 // Misc. class handling ///////////////////////////////////////////////////////////
732
733
734 JVM_ENTRY_PROF(jclass, JVM_GetCallerClass, JVM_GetCallerClass(JNIEnv* env))
735 // Getting the class of the caller frame.
736 //
737 // The call stack at this point looks something like this:
738 //
739 // [0] [ @CallerSensitive public jdk.internal.reflect.Reflection.getCallerClass ]
740 // [1] [ @CallerSensitive API.method ]
741 // [.] [ (skipped intermediate frames) ]
742 // [n] [ caller ]
743 vframeStream vfst(thread);
744 // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass
745 for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) {
746 Method* m = vfst.method();
747 assert(m != nullptr, "sanity");
748 switch (n) {
749 case 0:
750 // This must only be called from Reflection.getCallerClass
751 if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) {
752 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass");
753 }
754 // fall-through
755 case 1:
756 // Frame 0 and 1 must be caller sensitive.
757 if (!m->caller_sensitive()) {
758 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n));
759 }
760 break;
761 default:
762 if (!m->is_ignored_by_security_stack_walk()) {
763 // We have reached the desired frame; return the holder class.
764 return (jclass) JNIHandles::make_local(THREAD, m->method_holder()->java_mirror());
765 }
766 break;
767 }
768 }
769 return nullptr;
770 JVM_END
771
772
773 JVM_ENTRY_PROF(jclass, JVM_FindPrimitiveClass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
774 oop mirror = nullptr;
775 BasicType t = name2type(utf);
776 if (t != T_ILLEGAL && !is_reference_type(t)) {
777 mirror = Universe::java_mirror(t);
778 }
779 if (mirror == nullptr) {
780 THROW_MSG_NULL(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
781 } else {
782 return (jclass) JNIHandles::make_local(THREAD, mirror);
783 }
784 JVM_END
785
786
787 // Returns a class loaded by the bootstrap class loader; or null
788 // if not found. ClassNotFoundException is not thrown.
789 // FindClassFromBootLoader is exported to the launcher for windows.
790 JVM_ENTRY_PROF(jclass, JVM_FindClassFromBootLoader, JVM_FindClassFromBootLoader(JNIEnv* env, const char* name))
791 // Java libraries should ensure that name is never null or illegal.
792 if (name == nullptr || (int)strlen(name) > Symbol::max_length()) {
793 // It's impossible to create this class; the name cannot fit
794 // into the constant pool.
795 return nullptr;
796 }
797 assert(UTF8::is_legal_utf8((const unsigned char*)name, strlen(name), false), "illegal UTF name");
798
799 TempNewSymbol h_name = SymbolTable::new_symbol(name);
800 Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
801 if (k == nullptr) {
802 return nullptr;
803 }
804
805 if (log_is_enabled(Debug, class, resolve)) {
806 trace_class_resolution(k);
807 }
808 return (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
809 JVM_END
810
811 // Find a class with this name in this loader.
812 JVM_ENTRY_PROF(jclass, JVM_FindClassFromLoader, JVM_FindClassFromLoader(JNIEnv* env, const char* name,
813 jboolean init, jobject loader))
814 TempNewSymbol h_name =
815 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_ClassNotFoundException(),
816 CHECK_NULL);
817
818 oop loader_oop = JNIHandles::resolve(loader);
819 Handle h_loader(THREAD, loader_oop);
820
821 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
822 false, THREAD);
823
824 if (log_is_enabled(Debug, class, resolve) && result != nullptr) {
825 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
826 }
827 return result;
828 JVM_END
829
830 // Currently only called from the old verifier.
831 JVM_ENTRY_PROF(jclass, JVM_FindClassFromClass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
832 jboolean init, jclass from))
833 TempNewSymbol h_name =
834 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_ClassNotFoundException(),
835 CHECK_NULL);
836 oop from_class_oop = JNIHandles::resolve(from);
837 assert(from_class_oop != nullptr, "must be");
838 Klass* from_class = java_lang_Class::as_Klass(from_class_oop);
839 assert(from_class != nullptr, "must be");
840 oop class_loader = from_class->class_loader();
841
842 Handle h_loader(THREAD, class_loader);
843 jclass result = find_class_from_class_loader(env, h_name, init, h_loader, true, thread);
844
845 if (log_is_enabled(Debug, class, resolve) && result != nullptr) {
846 // this function is generally only used for class loading during verification.
847 ResourceMark rm;
848 const char* from_name = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(from))->external_name();
849 const char* to_name = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))->external_name();
850 log_debug(class, resolve)("%s %s (verification)", from_name, to_name);
851 }
852
1011 ik->external_name(),
1012 host_class->external_name(),
1013 ik->is_hidden() ? "is hidden" : "is not hidden");
1014 }
1015 }
1016
1017 if ((!is_hidden || is_nestmate) && !Reflection::is_same_class_package(lookup_k, ik)) {
1018 // non-hidden class or nestmate class must be in the same package as the Lookup class
1019 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Lookup class and defined class are in different packages");
1020 }
1021
1022 if (init) {
1023 ik->initialize(CHECK_NULL);
1024 } else {
1025 ik->link_class(CHECK_NULL);
1026 }
1027
1028 return (jclass) JNIHandles::make_local(THREAD, ik->java_mirror());
1029 }
1030
1031 JVM_ENTRY_PROF(jclass, JVM_DefineClass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
1032 return jvm_define_class_common(name, loader, buf, len, pd, nullptr, THREAD);
1033 JVM_END
1034
1035 /*
1036 * Define a class with the specified lookup class.
1037 * lookup: Lookup class
1038 * name: the name of the class
1039 * buf: class bytes
1040 * len: length of class bytes
1041 * pd: protection domain
1042 * init: initialize the class
1043 * flags: properties of the class
1044 * classData: private static pre-initialized field
1045 */
1046 JVM_ENTRY_PROF(jclass, JVM_LookupDefineClass, JVM_LookupDefineClass(JNIEnv *env, jclass lookup, const char *name, const jbyte *buf,
1047 jsize len, jobject pd, jboolean initialize, int flags, jobject classData))
1048
1049 if (lookup == nullptr) {
1050 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Lookup class is null");
1051 }
1052
1053 assert(buf != nullptr, "buf must not be null");
1054
1055 return jvm_lookup_define_class(lookup, name, buf, len, pd, initialize, flags, classData, THREAD);
1056 JVM_END
1057
1058 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))
1059 return jvm_define_class_common(name, loader, buf, len, pd, source, THREAD);
1060 JVM_END
1061
1062 JVM_ENTRY_PROF(jclass, JVM_FindLoadedClass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
1063 ResourceMark rm(THREAD);
1064
1065 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
1066 char* str = java_lang_String::as_utf8_string(h_name());
1067
1068 // Sanity check, don't expect null
1069 if (str == nullptr) return nullptr;
1070
1071 // Internalize the string, converting '.' to '/' in string.
1072 char* p = (char*)str;
1073 while (*p != '\0') {
1074 if (*p == '.') {
1075 *p = '/';
1076 }
1077 p++;
1078 }
1079
1080 const int str_len = (int)(p - str);
1081 if (str_len > Symbol::max_length()) {
1082 // It's impossible to create this class; the name cannot fit
1086 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len);
1087
1088 // Security Note:
1089 // The Java level wrapper will perform the necessary security check allowing
1090 // us to pass the null as the initiating class loader.
1091 Handle h_loader(THREAD, JNIHandles::resolve(loader));
1092 Klass* k = SystemDictionary::find_instance_or_array_klass(THREAD, klass_name, h_loader);
1093 #if INCLUDE_CDS
1094 if (k == nullptr) {
1095 // If the class is not already loaded, try to see if it's in the shared
1096 // archive for the current classloader (h_loader).
1097 k = SystemDictionaryShared::find_or_load_shared_class(klass_name, h_loader, CHECK_NULL);
1098 }
1099 #endif
1100 return (k == nullptr) ? nullptr :
1101 (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
1102 JVM_END
1103
1104 // Module support //////////////////////////////////////////////////////////////////////////////
1105
1106 JVM_ENTRY_PROF(void, JVM_DefineModule, JVM_DefineModule(JNIEnv *env, jobject module, jboolean is_open, jstring version,
1107 jstring location, jobjectArray packages))
1108 Handle h_module (THREAD, JNIHandles::resolve(module));
1109 Modules::define_module(h_module, is_open, version, location, packages, CHECK);
1110 JVM_END
1111
1112 JVM_ENTRY_PROF(void, JVM_SetBootLoaderUnnamedModule, JVM_SetBootLoaderUnnamedModule(JNIEnv *env, jobject module))
1113 Handle h_module (THREAD, JNIHandles::resolve(module));
1114 Modules::set_bootloader_unnamed_module(h_module, CHECK);
1115 JVM_END
1116
1117 JVM_ENTRY_PROF(void, JVM_AddModuleExports, JVM_AddModuleExports(JNIEnv *env, jobject from_module, jstring package, jobject to_module))
1118 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1119 Handle h_to_module (THREAD, JNIHandles::resolve(to_module));
1120 Modules::add_module_exports_qualified(h_from_module, package, h_to_module, CHECK);
1121 JVM_END
1122
1123 JVM_ENTRY_PROF(void, JVM_AddModuleExportsToAllUnnamed, JVM_AddModuleExportsToAllUnnamed(JNIEnv *env, jobject from_module, jstring package))
1124 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1125 Modules::add_module_exports_to_all_unnamed(h_from_module, package, CHECK);
1126 JVM_END
1127
1128 JVM_ENTRY_PROF(void, JVM_AddModuleExportsToAll, JVM_AddModuleExportsToAll(JNIEnv *env, jobject from_module, jstring package))
1129 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1130 Modules::add_module_exports(h_from_module, package, Handle(), CHECK);
1131 JVM_END
1132
1133 JVM_ENTRY_PROF(void, JVM_AddReadsModule, JVM_AddReadsModule(JNIEnv *env, jobject from_module, jobject source_module))
1134 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1135 Handle h_source_module (THREAD, JNIHandles::resolve(source_module));
1136 Modules::add_reads_module(h_from_module, h_source_module, CHECK);
1137 JVM_END
1138
1139 JVM_ENTRY_PROF(void, JVM_DefineArchivedModules, JVM_DefineArchivedModules(JNIEnv *env, jobject platform_loader, jobject system_loader))
1140 Handle h_platform_loader (THREAD, JNIHandles::resolve(platform_loader));
1141 Handle h_system_loader (THREAD, JNIHandles::resolve(system_loader));
1142 Modules::define_archived_modules(h_platform_loader, h_system_loader, CHECK);
1143 JVM_END
1144
1145 // Reflection support //////////////////////////////////////////////////////////////////////////////
1146
1147 JVM_ENTRY_PROF(jstring, JVM_InitClassName, JVM_InitClassName(JNIEnv *env, jclass cls))
1148 assert (cls != nullptr, "illegal class");
1149 JvmtiVMObjectAllocEventCollector oam;
1150 ResourceMark rm(THREAD);
1151 HandleMark hm(THREAD);
1152 Handle java_class(THREAD, JNIHandles::resolve(cls));
1153 oop result = java_lang_Class::name(java_class, CHECK_NULL);
1154 return (jstring) JNIHandles::make_local(THREAD, result);
1155 JVM_END
1156
1157
1158 JVM_ENTRY_PROF(jobjectArray, JVM_GetClassInterfaces, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
1159 JvmtiVMObjectAllocEventCollector oam;
1160 oop mirror = JNIHandles::resolve_non_null(cls);
1161
1162 // Special handling for primitive objects
1163 if (java_lang_Class::is_primitive(mirror)) {
1164 // Primitive objects does not have any interfaces
1165 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(), 0, CHECK_NULL);
1166 return (jobjectArray) JNIHandles::make_local(THREAD, r);
1167 }
1168
1169 Klass* klass = java_lang_Class::as_Klass(mirror);
1170 // Figure size of result array
1171 int size;
1172 if (klass->is_instance_klass()) {
1173 size = InstanceKlass::cast(klass)->local_interfaces()->length();
1174 } else {
1175 assert(klass->is_objArray_klass() || klass->is_typeArray_klass(), "Illegal mirror klass");
1176 size = 2;
1177 }
1178
1179 // Allocate result array
1180 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(), size, CHECK_NULL);
1181 objArrayHandle result (THREAD, r);
1182 // Fill in result
1183 if (klass->is_instance_klass()) {
1184 // Regular instance klass, fill in all local interfaces
1185 for (int index = 0; index < size; index++) {
1186 InstanceKlass* k = InstanceKlass::cast(klass)->local_interfaces()->at(index);
1187 result->obj_at_put(index, k->java_mirror());
1188 }
1189 } else {
1190 // All arrays implement java.lang.Cloneable and java.io.Serializable
1191 result->obj_at_put(0, vmClasses::Cloneable_klass()->java_mirror());
1192 result->obj_at_put(1, vmClasses::Serializable_klass()->java_mirror());
1193 }
1194 return (jobjectArray) JNIHandles::make_local(THREAD, result());
1195 JVM_END
1196
1197
1198 JVM_ENTRY_PROF(jboolean, JVM_IsHiddenClass, JVM_IsHiddenClass(JNIEnv *env, jclass cls))
1199 oop mirror = JNIHandles::resolve_non_null(cls);
1200 if (java_lang_Class::is_primitive(mirror)) {
1201 return JNI_FALSE;
1202 }
1203 Klass* k = java_lang_Class::as_Klass(mirror);
1204 return k->is_hidden();
1205 JVM_END
1206
1207 JVM_ENTRY_PROF(jobject, JVM_FindScopedValueBindings, JVM_FindScopedValueBindings(JNIEnv *env, jclass cls))
1208 ResourceMark rm(THREAD);
1209 GrowableArray<Handle>* local_array = new GrowableArray<Handle>(12);
1210 JvmtiVMObjectAllocEventCollector oam;
1211
1212 // Iterate through Java frames
1213 vframeStream vfst(thread);
1214 for(; !vfst.at_end(); vfst.next()) {
1215 int loc = -1;
1216 // get method of frame
1217 Method* method = vfst.method();
1218
1219 Symbol *name = method->name();
1220
1221 InstanceKlass* holder = method->method_holder();
1222 if (name == vmSymbols::runWith_method_name()) {
1223 if (holder == vmClasses::Thread_klass()
1224 || holder == vmClasses::ScopedValue_Carrier_klass()) {
1225 loc = 1;
1226 }
1227 }
1228
1229 if (loc != -1) {
1230 javaVFrame *frame = vfst.asJavaVFrame();
1231 StackValueCollection* locals = frame->locals();
1232 StackValue* head_sv = locals->at(loc); // java/lang/ScopedValue$Snapshot
1233 Handle result = head_sv->get_obj();
1234 assert(!head_sv->obj_is_scalar_replaced(), "found scalar-replaced object");
1235 if (result() != nullptr) {
1236 return JNIHandles::make_local(THREAD, result());
1237 }
1238 }
1239 }
1240
1241 return nullptr;
1242 JVM_END
1243
1244
1245 JVM_ENTRY_PROF(jobjectArray, JVM_GetDeclaredClasses, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1246 JvmtiVMObjectAllocEventCollector oam;
1247 // ofClass is a reference to a java_lang_Class object. The mirror object
1248 // of an InstanceKlass
1249 oop ofMirror = JNIHandles::resolve_non_null(ofClass);
1250 if (java_lang_Class::is_primitive(ofMirror) ||
1251 ! java_lang_Class::as_Klass(ofMirror)->is_instance_klass()) {
1252 oop result = oopFactory::new_objArray(vmClasses::Class_klass(), 0, CHECK_NULL);
1253 return (jobjectArray)JNIHandles::make_local(THREAD, result);
1254 }
1255
1256 InstanceKlass* k = java_lang_Class::as_InstanceKlass(ofMirror);
1257 InnerClassesIterator iter(k);
1258
1259 if (iter.length() == 0) {
1260 // Neither an inner nor outer class
1261 oop result = oopFactory::new_objArray(vmClasses::Class_klass(), 0, CHECK_NULL);
1262 return (jobjectArray)JNIHandles::make_local(THREAD, result);
1263 }
1264
1265 // find inner class info
1291 result->obj_at_put(members, inner_klass->java_mirror());
1292 members++;
1293 }
1294 }
1295 }
1296 }
1297
1298 if (members != length) {
1299 // Return array of right length
1300 objArrayOop res = oopFactory::new_objArray(vmClasses::Class_klass(), members, CHECK_NULL);
1301 for(int i = 0; i < members; i++) {
1302 res->obj_at_put(i, result->obj_at(i));
1303 }
1304 return (jobjectArray)JNIHandles::make_local(THREAD, res);
1305 }
1306
1307 return (jobjectArray)JNIHandles::make_local(THREAD, result());
1308 JVM_END
1309
1310
1311 JVM_ENTRY_PROF(jclass, JVM_GetDeclaringClass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1312 {
1313 // ofClass is a reference to a java_lang_Class object.
1314 oop ofMirror = JNIHandles::resolve_non_null(ofClass);
1315 if (java_lang_Class::is_primitive(ofMirror)) {
1316 return nullptr;
1317 }
1318 Klass* klass = java_lang_Class::as_Klass(ofMirror);
1319 if (!klass->is_instance_klass()) {
1320 return nullptr;
1321 }
1322
1323 bool inner_is_member = false;
1324 Klass* outer_klass
1325 = InstanceKlass::cast(klass)->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1326 if (outer_klass == nullptr) return nullptr; // already a top-level class
1327 if (!inner_is_member) return nullptr; // a hidden class (inside a method)
1328 return (jclass) JNIHandles::make_local(THREAD, outer_klass->java_mirror());
1329 }
1330 JVM_END
1331
1332 JVM_ENTRY_PROF(jstring, JVM_GetSimpleBinaryName, JVM_GetSimpleBinaryName(JNIEnv *env, jclass cls))
1333 {
1334 oop mirror = JNIHandles::resolve_non_null(cls);
1335 if (java_lang_Class::is_primitive(mirror)) {
1336 return nullptr;
1337 }
1338 Klass* klass = java_lang_Class::as_Klass(mirror);
1339 if (!klass->is_instance_klass()) {
1340 return nullptr;
1341 }
1342 InstanceKlass* k = InstanceKlass::cast(klass);
1343 int ooff = 0, noff = 0;
1344 if (k->find_inner_classes_attr(&ooff, &noff, THREAD)) {
1345 if (noff != 0) {
1346 constantPoolHandle i_cp(thread, k->constants());
1347 Symbol* name = i_cp->symbol_at(noff);
1348 Handle str = java_lang_String::create_from_symbol(name, CHECK_NULL);
1349 return (jstring) JNIHandles::make_local(THREAD, str());
1350 }
1351 }
1352 return nullptr;
1353 }
1354 JVM_END
1355
1356 JVM_ENTRY_PROF(jstring, JVM_GetClassSignature, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1357 assert (cls != nullptr, "illegal class");
1358 JvmtiVMObjectAllocEventCollector oam;
1359 ResourceMark rm(THREAD);
1360 oop mirror = JNIHandles::resolve_non_null(cls);
1361 // Return null for arrays and primitives
1362 if (!java_lang_Class::is_primitive(mirror)) {
1363 Klass* k = java_lang_Class::as_Klass(mirror);
1364 if (k->is_instance_klass()) {
1365 Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1366 if (sym == nullptr) return nullptr;
1367 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1368 return (jstring) JNIHandles::make_local(THREAD, str());
1369 }
1370 }
1371 return nullptr;
1372 JVM_END
1373
1374
1375 JVM_ENTRY_PROF(jbyteArray, JVM_GetClassAnnotations, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1376 assert (cls != nullptr, "illegal class");
1377 oop mirror = JNIHandles::resolve_non_null(cls);
1378 // Return null for arrays and primitives
1379 if (!java_lang_Class::is_primitive(mirror)) {
1380 Klass* k = java_lang_Class::as_Klass(mirror);
1381 if (k->is_instance_klass()) {
1382 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1383 return (jbyteArray) JNIHandles::make_local(THREAD, a);
1384 }
1385 }
1386 return nullptr;
1387 JVM_END
1388
1389
1390 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd) {
1391 // some of this code was adapted from from jni_FromReflectedField
1392
1393 oop reflected = JNIHandles::resolve_non_null(field);
1394 oop mirror = java_lang_reflect_Field::clazz(reflected);
1395 int slot = java_lang_reflect_Field::slot(reflected);
1423 int slot = 0;
1424
1425 if (reflected->klass() == vmClasses::reflect_Constructor_klass()) {
1426 mirror = java_lang_reflect_Constructor::clazz(reflected);
1427 slot = java_lang_reflect_Constructor::slot(reflected);
1428 } else {
1429 assert(reflected->klass() == vmClasses::reflect_Method_klass(),
1430 "wrong type");
1431 mirror = java_lang_reflect_Method::clazz(reflected);
1432 slot = java_lang_reflect_Method::slot(reflected);
1433 }
1434 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(mirror);
1435
1436 Method* m = ik->method_with_idnum(slot);
1437 assert(m != nullptr, "cannot find method");
1438 return m; // caller has to deal with null in product mode
1439 }
1440
1441 /* Type use annotations support (JDK 1.8) */
1442
1443 JVM_ENTRY_PROF(jbyteArray, JVM_GetClassTypeAnnotations, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1444 assert (cls != nullptr, "illegal class");
1445 ResourceMark rm(THREAD);
1446 // Return null for arrays and primitives
1447 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1448 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1449 if (k->is_instance_klass()) {
1450 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1451 if (type_annotations != nullptr) {
1452 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1453 return (jbyteArray) JNIHandles::make_local(THREAD, a);
1454 }
1455 }
1456 }
1457 return nullptr;
1458 JVM_END
1459
1460 JVM_ENTRY_PROF(jbyteArray, JVM_GetMethodTypeAnnotations, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1461 assert (method != nullptr, "illegal method");
1462 // method is a handle to a java.lang.reflect.Method object
1463 Method* m = jvm_get_method_common(method);
1464 if (m == nullptr) {
1465 return nullptr;
1466 }
1467
1468 AnnotationArray* type_annotations = m->type_annotations();
1469 if (type_annotations != nullptr) {
1470 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1471 return (jbyteArray) JNIHandles::make_local(THREAD, a);
1472 }
1473
1474 return nullptr;
1475 JVM_END
1476
1477 JVM_ENTRY_PROF(jbyteArray, JVM_GetFieldTypeAnnotations, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1478 assert (field != nullptr, "illegal field");
1479 fieldDescriptor fd;
1480 bool gotFd = jvm_get_field_common(field, fd);
1481 if (!gotFd) {
1482 return nullptr;
1483 }
1484
1485 return (jbyteArray) JNIHandles::make_local(THREAD, Annotations::make_java_array(fd.type_annotations(), THREAD));
1486 JVM_END
1487
1488 static void bounds_check(const constantPoolHandle& cp, jint index, TRAPS) {
1489 if (!cp->is_within_bounds(index)) {
1490 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1491 }
1492 }
1493
1494 JVM_ENTRY_PROF(jobjectArray, JVM_GetMethodParameters, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1495 {
1496 // method is a handle to a java.lang.reflect.Method object
1497 Method* method_ptr = jvm_get_method_common(method);
1498 methodHandle mh (THREAD, method_ptr);
1499 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1500 const int num_params = mh->method_parameters_length();
1501
1502 if (num_params < 0) {
1503 // A -1 return value from method_parameters_length means there is no
1504 // parameter data. Return null to indicate this to the reflection
1505 // API.
1506 assert(num_params == -1, "num_params should be -1 if it is less than zero");
1507 return (jobjectArray)nullptr;
1508 } else {
1509 // Otherwise, we return something up to reflection, even if it is
1510 // a zero-length array. Why? Because in some cases this can
1511 // trigger a MalformedParametersException.
1512
1513 // make sure all the symbols are properly formatted
1514 for (int i = 0; i < num_params; i++) {
1527 objArrayOop result_oop = oopFactory::new_objArray(vmClasses::reflect_Parameter_klass(), num_params, CHECK_NULL);
1528 objArrayHandle result (THREAD, result_oop);
1529
1530 for (int i = 0; i < num_params; i++) {
1531 MethodParametersElement* params = mh->method_parameters_start();
1532 // For a 0 index, give a null symbol
1533 Symbol* sym = 0 != params[i].name_cp_index ?
1534 mh->constants()->symbol_at(params[i].name_cp_index) : nullptr;
1535 int flags = params[i].flags;
1536 oop param = Reflection::new_parameter(reflected_method, i, sym,
1537 flags, CHECK_NULL);
1538 result->obj_at_put(i, param);
1539 }
1540 return (jobjectArray)JNIHandles::make_local(THREAD, result());
1541 }
1542 }
1543 JVM_END
1544
1545 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1546
1547 JVM_ENTRY_PROF(jobjectArray, JVM_GetClassDeclaredFields, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1548 {
1549 JvmtiVMObjectAllocEventCollector oam;
1550
1551 oop ofMirror = JNIHandles::resolve_non_null(ofClass);
1552 // Exclude primitive types and array types
1553 if (java_lang_Class::is_primitive(ofMirror) ||
1554 java_lang_Class::as_Klass(ofMirror)->is_array_klass()) {
1555 // Return empty array
1556 oop res = oopFactory::new_objArray(vmClasses::reflect_Field_klass(), 0, CHECK_NULL);
1557 return (jobjectArray) JNIHandles::make_local(THREAD, res);
1558 }
1559
1560 InstanceKlass* k = java_lang_Class::as_InstanceKlass(ofMirror);
1561 constantPoolHandle cp(THREAD, k->constants());
1562
1563 // Ensure class is linked
1564 k->link_class(CHECK_NULL);
1565
1566 // Allocate result
1567 int num_fields;
1578 objArrayOop r = oopFactory::new_objArray(vmClasses::reflect_Field_klass(), num_fields, CHECK_NULL);
1579 objArrayHandle result (THREAD, r);
1580
1581 int out_idx = 0;
1582 fieldDescriptor fd;
1583 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1584 if (!publicOnly || fs.access_flags().is_public()) {
1585 fd.reinitialize(k, fs.to_FieldInfo());
1586 oop field = Reflection::new_field(&fd, CHECK_NULL);
1587 result->obj_at_put(out_idx, field);
1588 ++out_idx;
1589 }
1590 }
1591 assert(out_idx == num_fields, "just checking");
1592 return (jobjectArray) JNIHandles::make_local(THREAD, result());
1593 }
1594 JVM_END
1595
1596 // A class is a record if and only if it is final and a direct subclass of
1597 // java.lang.Record and has a Record attribute; otherwise, it is not a record.
1598 JVM_ENTRY_PROF(jboolean, JVM_IsRecord, JVM_IsRecord(JNIEnv *env, jclass cls))
1599 {
1600 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1601 if (k != nullptr && k->is_instance_klass()) {
1602 InstanceKlass* ik = InstanceKlass::cast(k);
1603 return ik->is_record();
1604 } else {
1605 return false;
1606 }
1607 }
1608 JVM_END
1609
1610 // Returns an array containing the components of the Record attribute,
1611 // or null if the attribute is not present.
1612 //
1613 // Note that this function returns the components of the Record attribute
1614 // even if the class is not a record.
1615 JVM_ENTRY_PROF(jobjectArray, JVM_GetRecordComponents, JVM_GetRecordComponents(JNIEnv* env, jclass ofClass))
1616 {
1617 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve_non_null(ofClass));
1618
1619 Array<RecordComponent*>* components = ik->record_components();
1620 if (components != nullptr) {
1621 JvmtiVMObjectAllocEventCollector oam;
1622 constantPoolHandle cp(THREAD, ik->constants());
1623 int length = components->length();
1624 assert(length >= 0, "unexpected record_components length");
1625 objArrayOop record_components =
1626 oopFactory::new_objArray(vmClasses::RecordComponent_klass(), length, CHECK_NULL);
1627 objArrayHandle components_h (THREAD, record_components);
1628
1629 for (int x = 0; x < length; x++) {
1630 RecordComponent* component = components->at(x);
1631 assert(component != nullptr, "unexpected null record component");
1632 oop component_oop = java_lang_reflect_RecordComponent::create(ik, component, CHECK_NULL);
1633 components_h->obj_at_put(x, component_oop);
1634 }
1635 return (jobjectArray)JNIHandles::make_local(THREAD, components_h());
1700 for (int i = 0; i < num_methods; i++) {
1701 methodHandle method(THREAD, k->method_with_idnum(idnums->at(i)));
1702 if (method.is_null()) {
1703 // Method may have been deleted and seems this API can handle null
1704 // Otherwise should probably put a method that throws NSME
1705 result->obj_at_put(i, nullptr);
1706 } else {
1707 oop m;
1708 if (want_constructor) {
1709 m = Reflection::new_constructor(method, CHECK_NULL);
1710 } else {
1711 m = Reflection::new_method(method, false, CHECK_NULL);
1712 }
1713 result->obj_at_put(i, m);
1714 }
1715 }
1716
1717 return (jobjectArray) JNIHandles::make_local(THREAD, result());
1718 }
1719
1720 JVM_ENTRY_PROF(jobjectArray, JVM_GetClassDeclaredMethods, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1721 {
1722 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1723 /*want_constructor*/ false,
1724 vmClasses::reflect_Method_klass(), THREAD);
1725 }
1726 JVM_END
1727
1728 JVM_ENTRY_PROF(jobjectArray, JVM_GetClassDeclaredConstructors, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1729 {
1730 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1731 /*want_constructor*/ true,
1732 vmClasses::reflect_Constructor_klass(), THREAD);
1733 }
1734 JVM_END
1735
1736 JVM_ENTRY_PROF(jboolean, JVM_AreNestMates, JVM_AreNestMates(JNIEnv *env, jclass current, jclass member))
1737 {
1738 InstanceKlass* c = java_lang_Class::as_InstanceKlass(JNIHandles::resolve_non_null(current));
1739 InstanceKlass* m = java_lang_Class::as_InstanceKlass(JNIHandles::resolve_non_null(member));
1740 return c->has_nestmate_access_to(m, THREAD);
1741 }
1742 JVM_END
1743
1744 JVM_ENTRY_PROF(jclass, JVM_GetNestHost, JVM_GetNestHost(JNIEnv* env, jclass current))
1745 {
1746 // current is not a primitive or array class
1747 InstanceKlass* c = java_lang_Class::as_InstanceKlass(JNIHandles::resolve_non_null(current));
1748 InstanceKlass* host = c->nest_host(THREAD);
1749 return (jclass) (host == nullptr ? nullptr :
1750 JNIHandles::make_local(THREAD, host->java_mirror()));
1751 }
1752 JVM_END
1753
1754 JVM_ENTRY_PROF(jobjectArray, JVM_GetNestMembers, JVM_GetNestMembers(JNIEnv* env, jclass current))
1755 {
1756 // current is not a primitive or array class
1757 ResourceMark rm(THREAD);
1758 InstanceKlass* c = java_lang_Class::as_InstanceKlass(JNIHandles::resolve_non_null(current));
1759 InstanceKlass* host = c->nest_host(THREAD);
1760
1761 log_trace(class, nestmates)("Calling GetNestMembers for type %s with nest-host %s",
1762 c->external_name(), host->external_name());
1763 {
1764 JvmtiVMObjectAllocEventCollector oam;
1765 Array<u2>* members = host->nest_members();
1766 int length = members == nullptr ? 0 : members->length();
1767
1768 log_trace(class, nestmates)(" - host has %d listed nest members", length);
1769
1770 // nest host is first in the array so make it one bigger
1771 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(),
1772 length + 1, CHECK_NULL);
1773 objArrayHandle result(THREAD, r);
1774 result->obj_at_put(0, host->java_mirror());
1812 log_trace(class, nestmates)(" - compacting array from length %d to %d",
1813 length + 1, count + 1);
1814
1815 objArrayOop r2 = oopFactory::new_objArray(vmClasses::Class_klass(),
1816 count + 1, CHECK_NULL);
1817 objArrayHandle result2(THREAD, r2);
1818 for (int i = 0; i < count + 1; i++) {
1819 result2->obj_at_put(i, result->obj_at(i));
1820 }
1821 return (jobjectArray)JNIHandles::make_local(THREAD, result2());
1822 }
1823 }
1824 else {
1825 assert(host == c || c->is_hidden(), "must be singleton nest or dynamic nestmate");
1826 }
1827 return (jobjectArray)JNIHandles::make_local(THREAD, result());
1828 }
1829 }
1830 JVM_END
1831
1832 JVM_ENTRY_PROF(jobjectArray, JVM_GetPermittedSubclasses, JVM_GetPermittedSubclasses(JNIEnv* env, jclass current))
1833 {
1834 oop mirror = JNIHandles::resolve_non_null(current);
1835 assert(!java_lang_Class::is_primitive(mirror), "should not be");
1836 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(mirror);
1837
1838 ResourceMark rm(THREAD);
1839 log_trace(class, sealed)("Calling GetPermittedSubclasses for %s type %s",
1840 ik->is_sealed() ? "sealed" : "non-sealed", ik->external_name());
1841 if (ik->is_sealed()) {
1842 JvmtiVMObjectAllocEventCollector oam;
1843 Array<u2>* subclasses = ik->permitted_subclasses();
1844 int length = subclasses->length();
1845
1846 log_trace(class, sealed)(" - sealed class has %d permitted subclasses", length);
1847
1848 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(),
1849 length, CHECK_NULL);
1850 objArrayHandle result(THREAD, r);
1851 int count = 0;
1852 for (int i = 0; i < length; i++) {
1874 }
1875 if (count < length) {
1876 // we had invalid entries so we need to compact the array
1877 objArrayOop r2 = oopFactory::new_objArray(vmClasses::Class_klass(),
1878 count, CHECK_NULL);
1879 objArrayHandle result2(THREAD, r2);
1880 for (int i = 0; i < count; i++) {
1881 result2->obj_at_put(i, result->obj_at(i));
1882 }
1883 return (jobjectArray)JNIHandles::make_local(THREAD, result2());
1884 }
1885 return (jobjectArray)JNIHandles::make_local(THREAD, result());
1886 } else {
1887 return nullptr;
1888 }
1889 }
1890 JVM_END
1891
1892 // Constant pool access //////////////////////////////////////////////////////////
1893
1894 JVM_ENTRY_PROF(jobject, JVM_GetClassConstantPool, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1895 {
1896 JvmtiVMObjectAllocEventCollector oam;
1897 oop mirror = JNIHandles::resolve_non_null(cls);
1898 // Return null for primitives and arrays
1899 if (!java_lang_Class::is_primitive(mirror)) {
1900 Klass* k = java_lang_Class::as_Klass(mirror);
1901 if (k->is_instance_klass()) {
1902 InstanceKlass* k_h = InstanceKlass::cast(k);
1903 Handle jcp = reflect_ConstantPool::create(CHECK_NULL);
1904 reflect_ConstantPool::set_cp(jcp(), k_h->constants());
1905 return JNIHandles::make_local(THREAD, jcp());
1906 }
1907 }
1908 return nullptr;
1909 }
1910 JVM_END
1911
1912
1913 JVM_ENTRY_PROF(jint, JVM_ConstantPoolGetSize, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj))
1914 {
1915 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1916 return cp->length();
1917 }
1918 JVM_END
1919
1920
1921 JVM_ENTRY_PROF(jclass, JVM_ConstantPoolGetClassAt, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jint index))
1922 {
1923 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1924 bounds_check(cp, index, CHECK_NULL);
1925 constantTag tag = cp->tag_at(index);
1926 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1927 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1928 }
1929 Klass* k = cp->klass_at(index, CHECK_NULL);
1930 return (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
1931 }
1932 JVM_END
1933
1934 JVM_ENTRY_PROF(jclass, JVM_ConstantPoolGetClassAtIfLoaded, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jint index))
1935 {
1936 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1937 bounds_check(cp, index, CHECK_NULL);
1938 constantTag tag = cp->tag_at(index);
1939 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1940 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1941 }
1942 Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
1943 if (k == nullptr) return nullptr;
1944 return (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
1945 }
1946 JVM_END
1947
1948 static jobject get_method_at_helper(const constantPoolHandle& cp, jint index, bool force_resolution, TRAPS) {
1949 constantTag tag = cp->tag_at(index);
1950 if (!tag.is_method() && !tag.is_interface_method()) {
1951 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1952 }
1953 int klass_ref = cp->uncached_klass_ref_index_at(index);
1954 Klass* k_o;
1958 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
1959 if (k_o == nullptr) return nullptr;
1960 }
1961 InstanceKlass* k = InstanceKlass::cast(k_o);
1962 Symbol* name = cp->uncached_name_ref_at(index);
1963 Symbol* sig = cp->uncached_signature_ref_at(index);
1964 methodHandle m (THREAD, k->find_method(name, sig));
1965 if (m.is_null()) {
1966 THROW_MSG_NULL(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
1967 }
1968 oop method;
1969 if (m->is_object_initializer()) {
1970 method = Reflection::new_constructor(m, CHECK_NULL);
1971 } else {
1972 // new_method accepts <clinit> as Method here
1973 method = Reflection::new_method(m, true, CHECK_NULL);
1974 }
1975 return JNIHandles::make_local(THREAD, method);
1976 }
1977
1978 JVM_ENTRY_PROF(jobject, JVM_ConstantPoolGetMethodAt, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jint index))
1979 {
1980 JvmtiVMObjectAllocEventCollector oam;
1981 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1982 bounds_check(cp, index, CHECK_NULL);
1983 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
1984 return res;
1985 }
1986 JVM_END
1987
1988 JVM_ENTRY_PROF(jobject, JVM_ConstantPoolGetMethodAtIfLoaded, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jint index))
1989 {
1990 JvmtiVMObjectAllocEventCollector oam;
1991 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1992 bounds_check(cp, index, CHECK_NULL);
1993 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
1994 return res;
1995 }
1996 JVM_END
1997
1998 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
1999 constantTag tag = cp->tag_at(index);
2000 if (!tag.is_field()) {
2001 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2002 }
2003 int klass_ref = cp->uncached_klass_ref_index_at(index);
2004 Klass* k_o;
2005 if (force_resolution) {
2006 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2007 } else {
2008 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2009 if (k_o == nullptr) return nullptr;
2010 }
2011 InstanceKlass* k = InstanceKlass::cast(k_o);
2012 Symbol* name = cp->uncached_name_ref_at(index);
2013 Symbol* sig = cp->uncached_signature_ref_at(index);
2014 fieldDescriptor fd;
2015 Klass* target_klass = k->find_field(name, sig, &fd);
2016 if (target_klass == nullptr) {
2017 THROW_MSG_NULL(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2018 }
2019 oop field = Reflection::new_field(&fd, CHECK_NULL);
2020 return JNIHandles::make_local(THREAD, field);
2021 }
2022
2023 JVM_ENTRY_PROF(jobject, JVM_ConstantPoolGetFieldAt, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jint index))
2024 {
2025 JvmtiVMObjectAllocEventCollector oam;
2026 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2027 bounds_check(cp, index, CHECK_NULL);
2028 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2029 return res;
2030 }
2031 JVM_END
2032
2033 JVM_ENTRY_PROF(jobject, JVM_ConstantPoolGetFieldAtIfLoaded, JVM_ConstantPoolGetFieldAtIfLoaded(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_field_at_helper(cp, index, false, CHECK_NULL);
2039 return res;
2040 }
2041 JVM_END
2042
2043 JVM_ENTRY_PROF(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt, JVM_ConstantPoolGetMemberRefInfoAt(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 constantTag tag = cp->tag_at(index);
2049 if (!tag.is_field_or_method()) {
2050 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2051 }
2052 int klass_ref = cp->uncached_klass_ref_index_at(index);
2053 Symbol* klass_name = cp->klass_name_at(klass_ref);
2054 Symbol* member_name = cp->uncached_name_ref_at(index);
2055 Symbol* member_sig = cp->uncached_signature_ref_at(index);
2056 objArrayOop dest_o = oopFactory::new_objArray(vmClasses::String_klass(), 3, CHECK_NULL);
2057 objArrayHandle dest(THREAD, dest_o);
2058 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2059 dest->obj_at_put(0, str());
2060 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2061 dest->obj_at_put(1, str());
2062 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2063 dest->obj_at_put(2, str());
2064 return (jobjectArray) JNIHandles::make_local(THREAD, dest());
2065 }
2066 JVM_END
2067
2068 JVM_ENTRY_PROF(jint, JVM_ConstantPoolGetClassRefIndexAt, JVM_ConstantPoolGetClassRefIndexAt(JNIEnv *env, jobject obj, jint index))
2069 {
2070 JvmtiVMObjectAllocEventCollector oam;
2071 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2072 bounds_check(cp, index, CHECK_0);
2073 constantTag tag = cp->tag_at(index);
2074 if (!tag.is_field_or_method()) {
2075 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2076 }
2077 return (jint) cp->uncached_klass_ref_index_at(index);
2078 }
2079 JVM_END
2080
2081 JVM_ENTRY_PROF(jint, JVM_ConstantPoolGetNameAndTypeRefIndexAt, JVM_ConstantPoolGetNameAndTypeRefIndexAt(JNIEnv *env, jobject obj, jint index))
2082 {
2083 JvmtiVMObjectAllocEventCollector oam;
2084 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2085 bounds_check(cp, index, CHECK_0);
2086 constantTag tag = cp->tag_at(index);
2087 if (!tag.is_invoke_dynamic() && !tag.is_field_or_method()) {
2088 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2089 }
2090 return (jint) cp->uncached_name_and_type_ref_index_at(index);
2091 }
2092 JVM_END
2093
2094 JVM_ENTRY_PROF(jobjectArray, JVM_ConstantPoolGetNameAndTypeRefInfoAt, JVM_ConstantPoolGetNameAndTypeRefInfoAt(JNIEnv *env, jobject obj, jint index))
2095 {
2096 JvmtiVMObjectAllocEventCollector oam;
2097 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2098 bounds_check(cp, index, CHECK_NULL);
2099 constantTag tag = cp->tag_at(index);
2100 if (!tag.is_name_and_type()) {
2101 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2102 }
2103 Symbol* member_name = cp->symbol_at(cp->name_ref_index_at(index));
2104 Symbol* member_sig = cp->symbol_at(cp->signature_ref_index_at(index));
2105 objArrayOop dest_o = oopFactory::new_objArray(vmClasses::String_klass(), 2, CHECK_NULL);
2106 objArrayHandle dest(THREAD, dest_o);
2107 Handle str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2108 dest->obj_at_put(0, str());
2109 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2110 dest->obj_at_put(1, str());
2111 return (jobjectArray) JNIHandles::make_local(THREAD, dest());
2112 }
2113 JVM_END
2114
2115 JVM_ENTRY_PROF(jint, JVM_ConstantPoolGetIntAt, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jint index))
2116 {
2117 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2118 bounds_check(cp, index, CHECK_0);
2119 constantTag tag = cp->tag_at(index);
2120 if (!tag.is_int()) {
2121 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2122 }
2123 return cp->int_at(index);
2124 }
2125 JVM_END
2126
2127 JVM_ENTRY_PROF(jlong, JVM_ConstantPoolGetLongAt, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jint index))
2128 {
2129 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2130 bounds_check(cp, index, CHECK_(0L));
2131 constantTag tag = cp->tag_at(index);
2132 if (!tag.is_long()) {
2133 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2134 }
2135 return cp->long_at(index);
2136 }
2137 JVM_END
2138
2139 JVM_ENTRY_PROF(jfloat, JVM_ConstantPoolGetFloatAt, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jint index))
2140 {
2141 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2142 bounds_check(cp, index, CHECK_(0.0f));
2143 constantTag tag = cp->tag_at(index);
2144 if (!tag.is_float()) {
2145 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2146 }
2147 return cp->float_at(index);
2148 }
2149 JVM_END
2150
2151 JVM_ENTRY_PROF(jdouble, JVM_ConstantPoolGetDoubleAt, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jint index))
2152 {
2153 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2154 bounds_check(cp, index, CHECK_(0.0));
2155 constantTag tag = cp->tag_at(index);
2156 if (!tag.is_double()) {
2157 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2158 }
2159 return cp->double_at(index);
2160 }
2161 JVM_END
2162
2163 JVM_ENTRY_PROF(jstring, JVM_ConstantPoolGetStringAt, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jint index))
2164 {
2165 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2166 bounds_check(cp, index, CHECK_NULL);
2167 constantTag tag = cp->tag_at(index);
2168 if (!tag.is_string()) {
2169 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2170 }
2171 oop str = cp->string_at(index, CHECK_NULL);
2172 return (jstring) JNIHandles::make_local(THREAD, str);
2173 }
2174 JVM_END
2175
2176 JVM_ENTRY_PROF(jstring, JVM_ConstantPoolGetUTF8At, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jint index))
2177 {
2178 JvmtiVMObjectAllocEventCollector oam;
2179 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2180 bounds_check(cp, index, CHECK_NULL);
2181 constantTag tag = cp->tag_at(index);
2182 if (!tag.is_symbol()) {
2183 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2184 }
2185 Symbol* sym = cp->symbol_at(index);
2186 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2187 return (jstring) JNIHandles::make_local(THREAD, str());
2188 }
2189 JVM_END
2190
2191 JVM_ENTRY_PROF(jbyte, JVM_ConstantPoolGetTagAt, JVM_ConstantPoolGetTagAt(JNIEnv *env, jobject obj, jint index))
2192 {
2193 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2194 bounds_check(cp, index, CHECK_0);
2195 constantTag tag = cp->tag_at(index);
2196 jbyte result = tag.value();
2197 // If returned tag values are not from the JVM spec, e.g. tags from 100 to 105,
2198 // they are changed to the corresponding tags from the JVM spec, so that java code in
2199 // sun.reflect.ConstantPool will return only tags from the JVM spec, not internal ones.
2200 if (tag.is_klass_or_reference()) {
2201 result = JVM_CONSTANT_Class;
2202 } else if (tag.is_string_index()) {
2203 result = JVM_CONSTANT_String;
2204 } else if (tag.is_method_type_in_error()) {
2205 result = JVM_CONSTANT_MethodType;
2206 } else if (tag.is_method_handle_in_error()) {
2207 result = JVM_CONSTANT_MethodHandle;
2208 } else if (tag.is_dynamic_constant_in_error()) {
2209 result = JVM_CONSTANT_Dynamic;
2210 }
2211 return result;
2212 }
2213 JVM_END
2214
2215 // Assertion support. //////////////////////////////////////////////////////////
2216
2217 JVM_ENTRY_PROF(jboolean, JVM_DesiredAssertionStatus, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2218 assert(cls != nullptr, "bad class");
2219
2220 oop r = JNIHandles::resolve(cls);
2221 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2222 if (java_lang_Class::is_primitive(r)) return false;
2223
2224 Klass* k = java_lang_Class::as_Klass(r);
2225 assert(k->is_instance_klass(), "must be an instance klass");
2226 if (!k->is_instance_klass()) return false;
2227
2228 ResourceMark rm(THREAD);
2229 const char* name = k->name()->as_C_string();
2230 bool system_class = k->class_loader() == nullptr;
2231 return JavaAssertions::enabled(name, system_class);
2232
2233 JVM_END
2234
2235
2236 // Return a new AssertionStatusDirectives object with the fields filled in with
2237 // command-line assertion arguments (i.e., -ea, -da).
2238 JVM_ENTRY_PROF(jobject, JVM_AssertionStatusDirectives, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2239 JvmtiVMObjectAllocEventCollector oam;
2240 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2241 return JNIHandles::make_local(THREAD, asd);
2242 JVM_END
2243
2244 // Verification ////////////////////////////////////////////////////////////////////////////////
2245
2246 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2247
2248 // RedefineClasses support: bug 6214132 caused verification to fail.
2249 // All functions from this section, unless noted otherwise, should call the functions
2250 // get_klass_considering_redefinition(), or
2251 // get_instance_klass_considering_redefinition()
2252 // These functions return JvmtiThreadState::_scratch_class if the verifier
2253 // was invoked in the middle of the redefinition of cls.
2254 // See jvmtiThreadState.hpp for details.
2255
2256 inline Klass* get_klass_considering_redefinition(jclass cls, JavaThread* thread) {
2257 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2258 if (k->is_instance_klass()) {
2259 return JvmtiThreadState::class_to_verify_considering_redefinition(InstanceKlass::cast(k), thread);
2260 } else {
2261 return k;
2262 }
2263 }
2264
2265 inline InstanceKlass* get_instance_klass_considering_redefinition(jclass cls, JavaThread* thread) {
2266 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve_non_null(cls));
2267 return JvmtiThreadState::class_to_verify_considering_redefinition(ik, thread);
2268 }
2269
2270 JVM_ENTRY_PROF(jboolean, JVM_IsInterface, JVM_IsInterface(JNIEnv *env, jclass cls))
2271 oop mirror = JNIHandles::resolve_non_null(cls);
2272 if (java_lang_Class::is_primitive(mirror)) {
2273 return JNI_FALSE;
2274 }
2275 Klass* k = java_lang_Class::as_Klass(mirror);
2276 // This isn't necessary since answer is the same because redefinition
2277 // has already checked this matches for the scratch class.
2278 // k = get_klass_considering_redefinition(cls, thread)
2279 jboolean result = k->is_interface();
2280 assert(!result || k->is_instance_klass(),
2281 "all interfaces are instance types");
2282 return result;
2283 JVM_END
2284
2285 JVM_ENTRY_PROF(const char*, JVM_GetClassNameUTF, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2286 // No need to call get_klass_considering_redefinition() as redefinition cannot change a class's name.
2287 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2288 return k->name()->as_utf8();
2289 JVM_END
2290
2291
2292 JVM_ENTRY_PROF(void, JVM_GetClassCPTypes, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2293 Klass* k = get_klass_considering_redefinition(cls, thread);
2294 // types will have length zero if this is not an InstanceKlass
2295 // (length is determined by call to JVM_GetClassCPEntriesCount)
2296 if (k->is_instance_klass()) {
2297 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2298 for (int index = cp->length() - 1; index >= 0; index--) {
2299 constantTag tag = cp->tag_at(index);
2300 types[index] = (tag.is_unresolved_klass()) ? (unsigned char) JVM_CONSTANT_Class : tag.value();
2301 }
2302 }
2303 JVM_END
2304
2305
2306 JVM_ENTRY_PROF(jint, JVM_GetClassCPEntriesCount, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2307 Klass* k = get_klass_considering_redefinition(cls, thread);
2308 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->constants()->length();
2309 JVM_END
2310
2311
2312 JVM_ENTRY_PROF(jint, JVM_GetClassFieldsCount, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2313 Klass* k = get_klass_considering_redefinition(cls, thread);
2314 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->java_fields_count();
2315 JVM_END
2316
2317
2318 JVM_ENTRY_PROF(jint, JVM_GetClassMethodsCount, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2319 Klass* k = get_klass_considering_redefinition(cls, thread);
2320 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->methods()->length();
2321 JVM_END
2322
2323
2324 // The following methods, used for the verifier, are never called with
2325 // array klasses, so a direct cast to InstanceKlass is safe.
2326 // Typically, these methods are called in a loop with bounds determined
2327 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2328 // zero for arrays.
2329 JVM_ENTRY_PROF(void, JVM_GetMethodIxExceptionIndexes, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2330 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2331 Method* method = ik->methods()->at(method_index);
2332 int length = method->checked_exceptions_length();
2333 if (length > 0) {
2334 CheckedExceptionElement* table= method->checked_exceptions_start();
2335 for (int i = 0; i < length; i++) {
2336 exceptions[i] = table[i].class_cp_index;
2337 }
2338 }
2339 JVM_END
2340
2341
2342 JVM_ENTRY_PROF(jint, JVM_GetMethodIxExceptionsCount, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2343 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2344 Method* method = ik->methods()->at(method_index);
2345 return method->checked_exceptions_length();
2346 JVM_END
2347
2348
2349 JVM_ENTRY_PROF(void, JVM_GetMethodIxByteCode, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2350 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2351 Method* method = ik->methods()->at(method_index);
2352 memcpy(code, method->code_base(), method->code_size());
2353 JVM_END
2354
2355
2356 JVM_ENTRY_PROF(jint, JVM_GetMethodIxByteCodeLength, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2357 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2358 Method* method = ik->methods()->at(method_index);
2359 return method->code_size();
2360 JVM_END
2361
2362
2363 JVM_ENTRY_PROF(void, JVM_GetMethodIxExceptionTableEntry, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2364 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2365 Method* method = ik->methods()->at(method_index);
2366 ExceptionTable extable(method);
2367 entry->start_pc = extable.start_pc(entry_index);
2368 entry->end_pc = extable.end_pc(entry_index);
2369 entry->handler_pc = extable.handler_pc(entry_index);
2370 entry->catchType = extable.catch_type_index(entry_index);
2371 JVM_END
2372
2373
2374 JVM_ENTRY_PROF(jint, JVM_GetMethodIxExceptionTableLength, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2375 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2376 Method* method = ik->methods()->at(method_index);
2377 return method->exception_table_length();
2378 JVM_END
2379
2380
2381 JVM_ENTRY_PROF(jint, JVM_GetMethodIxModifiers, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2382 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2383 Method* method = ik->methods()->at(method_index);
2384 return method->access_flags().as_method_flags();
2385 JVM_END
2386
2387
2388
2389 JVM_ENTRY_PROF(jint, JVM_GetFieldIxModifiers, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2390 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2391 return ik->field_access_flags(field_index);
2392 JVM_END
2393
2394
2395 JVM_ENTRY_PROF(jint, JVM_GetMethodIxLocalsCount, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2396 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2397 Method* method = ik->methods()->at(method_index);
2398 return method->max_locals();
2399 JVM_END
2400
2401
2402 JVM_ENTRY_PROF(jint, JVM_GetMethodIxArgsSize, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2403 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2404 Method* method = ik->methods()->at(method_index);
2405 return method->size_of_parameters();
2406 JVM_END
2407
2408
2409 JVM_ENTRY_PROF(jint, JVM_GetMethodIxMaxStack, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2410 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2411 Method* method = ik->methods()->at(method_index);
2412 return method->verifier_max_stack();
2413 JVM_END
2414
2415
2416 JVM_ENTRY_PROF(jboolean, JVM_IsConstructorIx, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2417 ResourceMark rm(THREAD);
2418 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2419 Method* method = ik->methods()->at(method_index);
2420 return method->name() == vmSymbols::object_initializer_name();
2421 JVM_END
2422
2423
2424 JVM_ENTRY_PROF(jboolean, JVM_IsVMGeneratedMethodIx, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2425 ResourceMark rm(THREAD);
2426 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2427 Method* method = ik->methods()->at(method_index);
2428 return method->is_overpass();
2429 JVM_END
2430
2431 JVM_ENTRY_PROF(const char*, JVM_GetMethodIxNameUTF, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2432 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2433 Method* method = ik->methods()->at(method_index);
2434 return method->name()->as_utf8();
2435 JVM_END
2436
2437
2438 JVM_ENTRY_PROF(const char*, JVM_GetMethodIxSignatureUTF, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2439 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2440 Method* method = ik->methods()->at(method_index);
2441 return method->signature()->as_utf8();
2442 JVM_END
2443
2444 /**
2445 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2446 * read entries in the constant pool. Since the old verifier always
2447 * works on a copy of the code, it will not see any rewriting that
2448 * may possibly occur in the middle of verification. So it is important
2449 * that nothing it calls tries to use the cpCache instead of the raw
2450 * constant pool, so we must use cp->uncached_x methods when appropriate.
2451 */
2452 JVM_ENTRY_PROF(const char*, JVM_GetCPFieldNameUTF, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2453 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2454 ConstantPool* cp = ik->constants();
2455 switch (cp->tag_at(cp_index).value()) {
2456 case JVM_CONSTANT_Fieldref:
2457 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2458 default:
2459 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2460 }
2461 ShouldNotReachHere();
2462 return nullptr;
2463 JVM_END
2464
2465
2466 JVM_ENTRY_PROF(const char*, JVM_GetCPMethodNameUTF, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2467 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2468 ConstantPool* cp = ik->constants();
2469 switch (cp->tag_at(cp_index).value()) {
2470 case JVM_CONSTANT_InterfaceMethodref:
2471 case JVM_CONSTANT_Methodref:
2472 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2473 default:
2474 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2475 }
2476 ShouldNotReachHere();
2477 return nullptr;
2478 JVM_END
2479
2480
2481 JVM_ENTRY_PROF(const char*, JVM_GetCPMethodSignatureUTF, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2482 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2483 ConstantPool* cp = ik->constants();
2484 switch (cp->tag_at(cp_index).value()) {
2485 case JVM_CONSTANT_InterfaceMethodref:
2486 case JVM_CONSTANT_Methodref:
2487 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2488 default:
2489 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2490 }
2491 ShouldNotReachHere();
2492 return nullptr;
2493 JVM_END
2494
2495
2496 JVM_ENTRY_PROF(const char*, JVM_GetCPFieldSignatureUTF, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2497 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2498 ConstantPool* cp = ik->constants();
2499 switch (cp->tag_at(cp_index).value()) {
2500 case JVM_CONSTANT_Fieldref:
2501 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2502 default:
2503 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2504 }
2505 ShouldNotReachHere();
2506 return nullptr;
2507 JVM_END
2508
2509
2510 JVM_ENTRY_PROF(const char*, JVM_GetCPClassNameUTF, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2511 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2512 ConstantPool* cp = ik->constants();
2513 Symbol* classname = cp->klass_name_at(cp_index);
2514 return classname->as_utf8();
2515 JVM_END
2516
2517
2518 JVM_ENTRY_PROF(const char*, JVM_GetCPFieldClassNameUTF, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2519 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2520 ConstantPool* cp = ik->constants();
2521 switch (cp->tag_at(cp_index).value()) {
2522 case JVM_CONSTANT_Fieldref: {
2523 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2524 Symbol* classname = cp->klass_name_at(class_index);
2525 return classname->as_utf8();
2526 }
2527 default:
2528 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2529 }
2530 ShouldNotReachHere();
2531 return nullptr;
2532 JVM_END
2533
2534
2535 JVM_ENTRY_PROF(const char*, JVM_GetCPMethodClassNameUTF, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2536 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2537 ConstantPool* cp = ik->constants();
2538 switch (cp->tag_at(cp_index).value()) {
2539 case JVM_CONSTANT_Methodref:
2540 case JVM_CONSTANT_InterfaceMethodref: {
2541 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2542 Symbol* classname = cp->klass_name_at(class_index);
2543 return classname->as_utf8();
2544 }
2545 default:
2546 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2547 }
2548 ShouldNotReachHere();
2549 return nullptr;
2550 JVM_END
2551
2552
2553 JVM_ENTRY_PROF(jint, JVM_GetCPFieldModifiers, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2554 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2555 InstanceKlass* ik_called = get_instance_klass_considering_redefinition(called_cls, thread);
2556 ConstantPool* cp = ik->constants();
2557 ConstantPool* cp_called = ik_called->constants();
2558 switch (cp->tag_at(cp_index).value()) {
2559 case JVM_CONSTANT_Fieldref: {
2560 Symbol* name = cp->uncached_name_ref_at(cp_index);
2561 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2562 for (JavaFieldStream fs(ik_called); !fs.done(); fs.next()) {
2563 if (fs.name() == name && fs.signature() == signature) {
2564 return fs.access_flags().as_field_flags();
2565 }
2566 }
2567 return -1;
2568 }
2569 default:
2570 fatal("JVM_GetCPFieldModifiers: illegal constant");
2571 }
2572 ShouldNotReachHere();
2573 return 0;
2574 JVM_END
2575
2576
2577 JVM_ENTRY_PROF(jint, JVM_GetCPMethodModifiers, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2578 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2579 InstanceKlass* ik_called = get_instance_klass_considering_redefinition(called_cls, thread);
2580 ConstantPool* cp = ik->constants();
2581 switch (cp->tag_at(cp_index).value()) {
2582 case JVM_CONSTANT_Methodref:
2583 case JVM_CONSTANT_InterfaceMethodref: {
2584 Symbol* name = cp->uncached_name_ref_at(cp_index);
2585 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2586 Array<Method*>* methods = ik_called->methods();
2587 int methods_count = methods->length();
2588 for (int i = 0; i < methods_count; i++) {
2589 Method* method = methods->at(i);
2590 if (method->name() == name && method->signature() == signature) {
2591 return method->access_flags().as_method_flags();
2592 }
2593 }
2594 return -1;
2595 }
2596 default:
2597 fatal("JVM_GetCPMethodModifiers: illegal constant");
2598 }
2599 ShouldNotReachHere();
2600 return 0;
2601 JVM_END
2602
2603
2604 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2605
2606 JVM_LEAF_PROF(void, JVM_ReleaseUTF, JVM_ReleaseUTF(const char *utf))
2607 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2608 JVM_END
2609
2610
2611 JVM_ENTRY_PROF(jboolean, JVM_IsSameClassPackage, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2612 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2613 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2614 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2615 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2616 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2617 JVM_END
2618
2619 // Printing support //////////////////////////////////////////////////
2620 extern "C" {
2621
2622 ATTRIBUTE_PRINTF(3, 0)
2623 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2624 // Reject count values that are negative signed values converted to
2625 // unsigned; see bug 4399518, 4417214
2626 if ((intptr_t)count <= 0) return -1;
2627
2628 int result = os::vsnprintf(str, count, fmt, args);
2629 if (result > 0 && (size_t)result >= count) {
2630 result = -1;
2631 }
2690 // In most of the JVM thread support functions we need to access the
2691 // thread through a ThreadsListHandle to prevent it from exiting and
2692 // being reclaimed while we try to operate on it. The exceptions to this
2693 // rule are when operating on the current thread, or if the monitor of
2694 // the target java.lang.Thread is locked at the Java level - in both
2695 // cases the target cannot exit.
2696
2697 static void thread_entry(JavaThread* thread, TRAPS) {
2698 HandleMark hm(THREAD);
2699 Handle obj(THREAD, thread->threadObj());
2700 JavaValue result(T_VOID);
2701 JavaCalls::call_virtual(&result,
2702 obj,
2703 vmClasses::Thread_klass(),
2704 vmSymbols::run_method_name(),
2705 vmSymbols::void_method_signature(),
2706 THREAD);
2707 }
2708
2709
2710 JVM_ENTRY_PROF(void, JVM_StartThread, JVM_StartThread(JNIEnv* env, jobject jthread))
2711 #if INCLUDE_CDS
2712 if (CDSConfig::allow_only_single_java_thread()) {
2713 // During java -Xshare:dump, if we allow multiple Java threads to
2714 // execute in parallel, symbols and classes may be loaded in
2715 // random orders which will make the resulting CDS archive
2716 // non-deterministic.
2717 //
2718 // Lucikly, during java -Xshare:dump, it's important to run only
2719 // the code in the main Java thread (which is NOT started here) that
2720 // creates the module graph, etc. It's safe to not start the other
2721 // threads which are launched by class static initializers
2722 // (ReferenceHandler, FinalizerThread and CleanerImpl).
2723 if (log_is_enabled(Info, aot)) {
2724 ResourceMark rm;
2725 oop t = JNIHandles::resolve_non_null(jthread);
2726 log_info(aot)("JVM_StartThread() ignored: %s", t->klass()->external_name());
2727 }
2728 return;
2729 }
2730 #endif
2787 log_warning(os, thread)("Failed to start the native thread for java.lang.Thread \"%s\"",
2788 JavaThread::name_for(JNIHandles::resolve_non_null(jthread)));
2789 // No one should hold a reference to the 'native_thread'.
2790 native_thread->smr_delete();
2791 if (JvmtiExport::should_post_resource_exhausted()) {
2792 JvmtiExport::post_resource_exhausted(
2793 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2794 os::native_thread_creation_failed_msg());
2795 }
2796 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2797 os::native_thread_creation_failed_msg());
2798 }
2799
2800 JFR_ONLY(Jfr::on_java_thread_start(thread, native_thread);)
2801
2802 Thread::start(native_thread);
2803
2804 JVM_END
2805
2806
2807 JVM_ENTRY_PROF(void, JVM_SetThreadPriority, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
2808 ThreadsListHandle tlh(thread);
2809 oop java_thread = nullptr;
2810 JavaThread* receiver = nullptr;
2811 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, &java_thread);
2812 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
2813
2814 if (is_alive) {
2815 // jthread refers to a live JavaThread.
2816 Thread::set_priority(receiver, (ThreadPriority)prio);
2817 }
2818 // Implied else: If the JavaThread hasn't started yet, then the
2819 // priority set in the java.lang.Thread object above will be pushed
2820 // down when it does start.
2821 JVM_END
2822
2823
2824 JVM_LEAF_PROF(void, JVM_Yield, JVM_Yield(JNIEnv *env, jclass threadClass))
2825 HOTSPOT_THREAD_YIELD();
2826 os::naked_yield();
2827 JVM_END
2828
2829 JVM_ENTRY_PROF(void, JVM_SleepNanos, JVM_SleepNanos(JNIEnv* env, jclass threadClass, jlong nanos))
2830 if (nanos < 0) {
2831 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "nanosecond timeout value out of range");
2832 }
2833
2834 if (thread->is_interrupted(true) && !HAS_PENDING_EXCEPTION) {
2835 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2836 }
2837
2838 // Save current thread state and restore it at the end of this block.
2839 // And set new thread state to SLEEPING.
2840 JavaThreadSleepState jtss(thread);
2841
2842 HOTSPOT_THREAD_SLEEP_BEGIN(nanos / NANOSECS_PER_MILLISEC);
2843
2844 if (nanos == 0) {
2845 os::naked_yield();
2846 } else {
2847 ThreadState old_state = thread->osthread()->get_state();
2848 thread->osthread()->set_state(SLEEPING);
2849 if (!thread->sleep_nanos(nanos)) { // interrupted or async exception was installed
2850 // An asynchronous exception could have been thrown on
2851 // us while we were sleeping. We do not overwrite those.
2852 if (!HAS_PENDING_EXCEPTION) {
2853 HOTSPOT_THREAD_SLEEP_END(1);
2854 if (!thread->has_async_exception_condition()) {
2855 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
2856 // to properly restore the thread state. That's likely wrong.
2857 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2858 }
2859 }
2860 }
2861 thread->osthread()->set_state(old_state);
2862 }
2863 HOTSPOT_THREAD_SLEEP_END(0);
2864 JVM_END
2865
2866 JVM_ENTRY_PROF(jobject, JVM_CurrentCarrierThread, JVM_CurrentCarrierThread(JNIEnv* env, jclass threadClass))
2867 oop jthread = thread->threadObj();
2868 assert(jthread != nullptr, "no current carrier thread!");
2869 return JNIHandles::make_local(THREAD, jthread);
2870 JVM_END
2871
2872 JVM_ENTRY_PROF(jobject, JVM_CurrentThread, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
2873 oop theThread = thread->vthread();
2874 assert(theThread != (oop)nullptr, "no current thread!");
2875 return JNIHandles::make_local(THREAD, theThread);
2876 JVM_END
2877
2878 JVM_ENTRY_PROF(void, JVM_SetCurrentThread, JVM_SetCurrentThread(JNIEnv* env, jobject thisThread,
2879 jobject theThread))
2880 oop threadObj = JNIHandles::resolve(theThread);
2881 thread->set_vthread(threadObj);
2882
2883 // Set _monitor_owner_id of new current Thread
2884 thread->set_monitor_owner_id(java_lang_Thread::thread_id(threadObj));
2885
2886 JFR_ONLY(Jfr::on_set_current_thread(thread, threadObj);)
2887 JVM_END
2888
2889 JVM_ENTRY_PROF(jlong, JVM_GetNextThreadIdOffset, JVM_GetNextThreadIdOffset(JNIEnv* env, jclass threadClass))
2890 return ThreadIdentifier::unsafe_offset();
2891 JVM_END
2892
2893 JVM_ENTRY_PROF(void, JVM_Interrupt, JVM_Interrupt(JNIEnv* env, jobject jthread))
2894 ThreadsListHandle tlh(thread);
2895 JavaThread* receiver = nullptr;
2896 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, nullptr);
2897 if (is_alive) {
2898 // jthread refers to a live JavaThread.
2899 receiver->interrupt();
2900 }
2901 JVM_END
2902
2903 // Return true iff the current thread has locked the object passed in
2904
2905 JVM_ENTRY_PROF(jboolean, JVM_HoldsLock, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
2906 if (obj == nullptr) {
2907 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
2908 }
2909 Handle h_obj(THREAD, JNIHandles::resolve(obj));
2910 return ObjectSynchronizer::current_thread_holds_lock(thread, h_obj);
2911 JVM_END
2912
2913 JVM_ENTRY_PROF(jobject, JVM_GetStackTrace, JVM_GetStackTrace(JNIEnv *env, jobject jthread))
2914 oop trace = java_lang_Thread::async_get_stack_trace(jthread, THREAD);
2915 return JNIHandles::make_local(THREAD, trace);
2916 JVM_END
2917
2918 JVM_ENTRY_PROF(jobject, JVM_CreateThreadSnapshot, JVM_CreateThreadSnapshot(JNIEnv* env, jobject jthread))
2919 #if INCLUDE_JVMTI
2920 oop snapshot = ThreadSnapshotFactory::get_thread_snapshot(jthread, THREAD);
2921 return JNIHandles::make_local(THREAD, snapshot);
2922 #else
2923 THROW_NULL(vmSymbols::java_lang_UnsupportedOperationException());
2924 #endif
2925 JVM_END
2926
2927 JVM_ENTRY_PROF(void, JVM_SetNativeThreadName, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
2928 // We don't use a ThreadsListHandle here because the current thread
2929 // must be alive.
2930 oop java_thread = JNIHandles::resolve_non_null(jthread);
2931 JavaThread* thr = java_lang_Thread::thread(java_thread);
2932 if (thread == thr && !thr->has_attached_via_jni()) {
2933 // Thread naming is only supported for the current thread and
2934 // we don't set the name of an attached thread to avoid stepping
2935 // on other programs.
2936 ResourceMark rm(thread);
2937 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
2938 os::set_native_thread_name(thread_name);
2939 }
2940 JVM_END
2941
2942 JVM_ENTRY_PROF(jobject, JVM_ScopedValueCache, JVM_ScopedValueCache(JNIEnv* env, jclass threadClass))
2943 oop theCache = thread->scopedValueCache();
2944 return JNIHandles::make_local(THREAD, theCache);
2945 JVM_END
2946
2947 JVM_ENTRY_PROF(void, JVM_SetScopedValueCache, JVM_SetScopedValueCache(JNIEnv* env, jclass threadClass,
2948 jobject theCache))
2949 arrayOop objs = arrayOop(JNIHandles::resolve(theCache));
2950 thread->set_scopedValueCache(objs);
2951 JVM_END
2952
2953 // java.lang.Package ////////////////////////////////////////////////////////////////
2954
2955
2956 JVM_ENTRY_PROF(jstring, JVM_GetSystemPackage, JVM_GetSystemPackage(JNIEnv *env, jstring name))
2957 ResourceMark rm(THREAD);
2958 JvmtiVMObjectAllocEventCollector oam;
2959 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
2960 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
2961 return (jstring) JNIHandles::make_local(THREAD, result);
2962 JVM_END
2963
2964
2965 JVM_ENTRY_PROF(jobjectArray, JVM_GetSystemPackages, JVM_GetSystemPackages(JNIEnv *env))
2966 JvmtiVMObjectAllocEventCollector oam;
2967 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
2968 return (jobjectArray) JNIHandles::make_local(THREAD, result);
2969 JVM_END
2970
2971
2972 // java.lang.ref.Reference ///////////////////////////////////////////////////////////////
2973
2974
2975 JVM_ENTRY_PROF(jobject, JVM_GetAndClearReferencePendingList, JVM_GetAndClearReferencePendingList(JNIEnv* env))
2976 MonitorLocker ml(Heap_lock);
2977 oop ref = Universe::reference_pending_list();
2978 if (ref != nullptr) {
2979 Universe::clear_reference_pending_list();
2980 }
2981 return JNIHandles::make_local(THREAD, ref);
2982 JVM_END
2983
2984 JVM_ENTRY_PROF(jboolean, JVM_HasReferencePendingList, JVM_HasReferencePendingList(JNIEnv* env))
2985 MonitorLocker ml(Heap_lock);
2986 return Universe::has_reference_pending_list();
2987 JVM_END
2988
2989 JVM_ENTRY_PROF(void, JVM_WaitForReferencePendingList, JVM_WaitForReferencePendingList(JNIEnv* env))
2990 MonitorLocker ml(Heap_lock);
2991 while (!Universe::has_reference_pending_list()) {
2992 ml.wait();
2993 }
2994 JVM_END
2995
2996 JVM_ENTRY_PROF(jobject, JVM_ReferenceGet, JVM_ReferenceGet(JNIEnv* env, jobject ref))
2997 oop ref_oop = JNIHandles::resolve_non_null(ref);
2998 // PhantomReference has its own implementation of get().
2999 assert(!java_lang_ref_Reference::is_phantom(ref_oop), "precondition");
3000 oop referent = java_lang_ref_Reference::weak_referent(ref_oop);
3001 return JNIHandles::make_local(THREAD, referent);
3002 JVM_END
3003
3004 JVM_ENTRY_PROF(jboolean, JVM_ReferenceRefersTo, JVM_ReferenceRefersTo(JNIEnv* env, jobject ref, jobject o))
3005 oop ref_oop = JNIHandles::resolve_non_null(ref);
3006 // PhantomReference has its own implementation of refersTo().
3007 // See: JVM_PhantomReferenceRefersTo
3008 assert(!java_lang_ref_Reference::is_phantom(ref_oop), "precondition");
3009 oop referent = java_lang_ref_Reference::weak_referent_no_keepalive(ref_oop);
3010 return referent == JNIHandles::resolve(o);
3011 JVM_END
3012
3013 JVM_ENTRY_PROF(void, JVM_ReferenceClear, JVM_ReferenceClear(JNIEnv* env, jobject ref))
3014 oop ref_oop = JNIHandles::resolve_non_null(ref);
3015 // FinalReference has it's own implementation of clear().
3016 assert(!java_lang_ref_Reference::is_final(ref_oop), "precondition");
3017 if (java_lang_ref_Reference::unknown_referent_no_keepalive(ref_oop) == nullptr) {
3018 // If the referent has already been cleared then done.
3019 // However, if the referent is dead but has not yet been cleared by
3020 // concurrent reference processing, it should NOT be cleared here.
3021 // Instead, clearing should be left to the GC. Clearing it here could
3022 // detectably lose an expected notification, which is impossible with
3023 // STW reference processing. The clearing in enqueue() doesn't have
3024 // this problem, since the enqueue covers the notification, but it's not
3025 // worth the effort to handle that case specially.
3026 return;
3027 }
3028 java_lang_ref_Reference::clear_referent(ref_oop);
3029 JVM_END
3030
3031
3032 // java.lang.ref.PhantomReference //////////////////////////////////////////////////
3033
3034
3035 JVM_ENTRY_PROF(jboolean, JVM_PhantomReferenceRefersTo, JVM_PhantomReferenceRefersTo(JNIEnv* env, jobject ref, jobject o))
3036 oop ref_oop = JNIHandles::resolve_non_null(ref);
3037 oop referent = java_lang_ref_Reference::phantom_referent_no_keepalive(ref_oop);
3038 return referent == JNIHandles::resolve(o);
3039 JVM_END
3040
3041
3042 // ObjectInputStream ///////////////////////////////////////////////////////////////
3043
3044 // Return the first user-defined class loader up the execution stack, or null
3045 // if only code from the bootstrap or platform class loader is on the stack.
3046
3047 JVM_ENTRY_PROF(jobject, JVM_LatestUserDefinedLoader, JVM_LatestUserDefinedLoader(JNIEnv *env))
3048 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3049 InstanceKlass* ik = vfst.method()->method_holder();
3050 oop loader = ik->class_loader();
3051 if (loader != nullptr && !SystemDictionary::is_platform_class_loader(loader)) {
3052 return JNIHandles::make_local(THREAD, loader);
3053 }
3054 }
3055 return nullptr;
3056 JVM_END
3057
3058
3059 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3060
3061
3062 // resolve array handle and check arguments
3063 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3064 if (arr == nullptr) {
3065 THROW_NULL(vmSymbols::java_lang_NullPointerException());
3066 }
3067 oop a = JNIHandles::resolve_non_null(arr);
3068 if (!a->is_array()) {
3069 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3070 } else if (type_array_only && !a->is_typeArray()) {
3071 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array of primitive type");
3072 }
3073 return arrayOop(a);
3074 }
3075
3076
3077 JVM_ENTRY_PROF(jint, JVM_GetArrayLength, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3078 arrayOop a = check_array(env, arr, false, CHECK_0);
3079 return a->length();
3080 JVM_END
3081
3082
3083 JVM_ENTRY_PROF(jobject, JVM_GetArrayElement, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3084 JvmtiVMObjectAllocEventCollector oam;
3085 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3086 jvalue value;
3087 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3088 oop box = Reflection::box(&value, type, CHECK_NULL);
3089 return JNIHandles::make_local(THREAD, box);
3090 JVM_END
3091
3092
3093 JVM_ENTRY_PROF(jvalue, JVM_GetPrimitiveArrayElement, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3094 jvalue value;
3095 value.i = 0; // to initialize value before getting used in CHECK
3096 arrayOop a = check_array(env, arr, true, CHECK_(value));
3097 assert(a->is_typeArray(), "just checking");
3098 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3099 BasicType wide_type = (BasicType) wCode;
3100 if (type != wide_type) {
3101 Reflection::widen(&value, type, wide_type, CHECK_(value));
3102 }
3103 return value;
3104 JVM_END
3105
3106
3107 JVM_ENTRY_PROF(void, JVM_SetArrayElement, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3108 arrayOop a = check_array(env, arr, false, CHECK);
3109 oop box = JNIHandles::resolve(val);
3110 jvalue value;
3111 value.i = 0; // to initialize value before getting used in CHECK
3112 BasicType value_type;
3113 if (a->is_objArray()) {
3114 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3115 value_type = Reflection::unbox_for_regular_object(box, &value);
3116 } else {
3117 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3118 }
3119 Reflection::array_set(&value, a, index, value_type, CHECK);
3120 JVM_END
3121
3122
3123 JVM_ENTRY_PROF(void, JVM_SetPrimitiveArrayElement, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3124 arrayOop a = check_array(env, arr, true, CHECK);
3125 assert(a->is_typeArray(), "just checking");
3126 BasicType value_type = (BasicType) vCode;
3127 Reflection::array_set(&v, a, index, value_type, CHECK);
3128 JVM_END
3129
3130
3131 JVM_ENTRY_PROF(jobject, JVM_NewArray, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3132 JvmtiVMObjectAllocEventCollector oam;
3133 oop element_mirror = JNIHandles::resolve(eltClass);
3134 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3135 return JNIHandles::make_local(THREAD, result);
3136 JVM_END
3137
3138
3139 JVM_ENTRY_PROF(jobject, JVM_NewMultiArray, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3140 JvmtiVMObjectAllocEventCollector oam;
3141 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3142 oop element_mirror = JNIHandles::resolve(eltClass);
3143 assert(dim_array->is_typeArray(), "just checking");
3144 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3145 return JNIHandles::make_local(THREAD, result);
3146 JVM_END
3147
3148
3149 // Library support ///////////////////////////////////////////////////////////////////////////
3150
3151 JVM_LEAF_PROF(void*, JVM_LoadZipLibrary, JVM_LoadZipLibrary())
3152 return ZipLibrary::handle();
3153 JVM_END
3154
3155 JVM_ENTRY_NO_ENV_PROF(void*, JVM_LoadLibrary, JVM_LoadLibrary(const char* name, jboolean throwException))
3156 //%note jvm_ct
3157 char ebuf[1024];
3158 void *load_result;
3159 {
3160 ThreadToNativeFromVM ttnfvm(thread);
3161 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3162 }
3163 if (load_result == nullptr) {
3164 if (throwException) {
3165 char msg[1024];
3166 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3167 // Since 'ebuf' may contain a string encoded using
3168 // platform encoding scheme, we need to pass
3169 // Exceptions::unsafe_to_utf8 to the new_exception method
3170 // as the last argument. See bug 6367357.
3171 Handle h_exception =
3172 Exceptions::new_exception(thread,
3173 vmSymbols::java_lang_UnsatisfiedLinkError(),
3174 msg, Exceptions::unsafe_to_utf8);
3175
3176 THROW_HANDLE_NULL(h_exception);
3177 } else {
3178 log_info(library)("Failed to load library %s", name);
3179 return load_result;
3180 }
3181 }
3182 log_info(library)("Loaded library %s, handle " INTPTR_FORMAT, name, p2i(load_result));
3183 return load_result;
3184 JVM_END
3185
3186
3187 JVM_LEAF_PROF(void, JVM_UnloadLibrary, JVM_UnloadLibrary(void* handle))
3188 os::dll_unload(handle);
3189 log_info(library)("Unloaded library with handle " INTPTR_FORMAT, p2i(handle));
3190 JVM_END
3191
3192
3193 JVM_LEAF_PROF(void*, JVM_FindLibraryEntry, JVM_FindLibraryEntry(void* handle, const char* name))
3194 void* find_result = os::dll_lookup(handle, name);
3195 log_info(library)("%s %s in library with handle " INTPTR_FORMAT,
3196 find_result != nullptr ? "Found" : "Failed to find",
3197 name, p2i(handle));
3198 return find_result;
3199 JVM_END
3200
3201
3202 // JNI version ///////////////////////////////////////////////////////////////////////////////
3203
3204 JVM_LEAF_PROF(jboolean, JVM_IsSupportedJNIVersion, JVM_IsSupportedJNIVersion(jint version))
3205 return Threads::is_supported_jni_version_including_1_1(version);
3206 JVM_END
3207
3208
3209 JVM_LEAF_PROF(jboolean, JVM_IsPreviewEnabled, JVM_IsPreviewEnabled(void))
3210 return Arguments::enable_preview() ? JNI_TRUE : JNI_FALSE;
3211 JVM_END
3212
3213 JVM_LEAF_PROF(jboolean, JVM_IsContinuationsSupported, JVM_IsContinuationsSupported(void))
3214 return VMContinuations ? JNI_TRUE : JNI_FALSE;
3215 JVM_END
3216
3217 JVM_LEAF_PROF(jboolean, JVM_IsForeignLinkerSupported, JVM_IsForeignLinkerSupported(void))
3218 return ForeignGlobals::is_foreign_linker_supported() ? JNI_TRUE : JNI_FALSE;
3219 JVM_END
3220
3221 JVM_LEAF(jboolean, JVM_IsStaticallyLinked(void))
3222 return is_vm_statically_linked() ? JNI_TRUE : JNI_FALSE;
3223 JVM_END
3224
3225 // String support ///////////////////////////////////////////////////////////////////////////
3226
3227 JVM_ENTRY_PROF(jstring, JVM_InternString, JVM_InternString(JNIEnv *env, jstring str))
3228 JvmtiVMObjectAllocEventCollector oam;
3229 if (str == nullptr) return nullptr;
3230 oop string = JNIHandles::resolve_non_null(str);
3231 oop result = StringTable::intern(string, CHECK_NULL);
3232 return (jstring) JNIHandles::make_local(THREAD, result);
3233 JVM_END
3234
3235
3236 // VM Raw monitor support //////////////////////////////////////////////////////////////////////
3237
3238 // VM Raw monitors (not to be confused with JvmtiRawMonitors) are a simple mutual exclusion
3239 // lock (not actually monitors: no wait/notify) that is exported by the VM for use by JDK
3240 // library code. They may be used by JavaThreads and non-JavaThreads and do not participate
3241 // in the safepoint protocol, thread suspension, thread interruption, or most things of that
3242 // nature, except JavaThreads will be blocked by VM_Exit::block_if_vm_exited if the VM has
3243 // shutdown. JavaThreads will be "in native" when using this API from JDK code.
3244
3245
3246 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3247 VM_Exit::block_if_vm_exited();
3267 ((PlatformMutex*) mon)->unlock();
3268 }
3269
3270
3271 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
3272
3273 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init,
3274 Handle loader, jboolean throwError, TRAPS) {
3275 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, throwError != 0, CHECK_NULL);
3276
3277 // Check if we should initialize the class
3278 if (init && klass->is_instance_klass()) {
3279 klass->initialize(CHECK_NULL);
3280 }
3281 return (jclass) JNIHandles::make_local(THREAD, klass->java_mirror());
3282 }
3283
3284
3285 // Method ///////////////////////////////////////////////////////////////////////////////////////////
3286
3287 JVM_ENTRY_PROF(jobject, JVM_InvokeMethod, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
3288 Handle method_handle;
3289 if (thread->stack_overflow_state()->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
3290 method_handle = Handle(THREAD, JNIHandles::resolve(method));
3291 Handle receiver(THREAD, JNIHandles::resolve(obj));
3292 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3293 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
3294 jobject res = JNIHandles::make_local(THREAD, result);
3295 if (JvmtiExport::should_post_vm_object_alloc()) {
3296 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
3297 assert(ret_type != nullptr, "sanity check: ret_type oop must not be null!");
3298 if (java_lang_Class::is_primitive(ret_type)) {
3299 // Only for primitive type vm allocates memory for java object.
3300 // See box() method.
3301 JvmtiExport::post_vm_object_alloc(thread, result);
3302 }
3303 }
3304 return res;
3305 } else {
3306 THROW_NULL(vmSymbols::java_lang_StackOverflowError());
3307 }
3308 JVM_END
3309
3310
3311 JVM_ENTRY_PROF(jobject, JVM_NewInstanceFromConstructor, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
3312 oop constructor_mirror = JNIHandles::resolve(c);
3313 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3314 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
3315 jobject res = JNIHandles::make_local(THREAD, result);
3316 if (JvmtiExport::should_post_vm_object_alloc()) {
3317 JvmtiExport::post_vm_object_alloc(thread, result);
3318 }
3319 return res;
3320 JVM_END
3321
3322 JVM_ENTRY_PROF(void, JVM_InitializeFromArchive, JVM_InitializeFromArchive(JNIEnv* env, jclass cls))
3323 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
3324 HeapShared::initialize_from_archived_subgraph(THREAD, k);
3325 JVM_END
3326
3327 JVM_ENTRY_PROF(void, JVM_RegisterLambdaProxyClassForArchiving, JVM_RegisterLambdaProxyClassForArchiving(JNIEnv* env,
3328 jclass caller,
3329 jstring interfaceMethodName,
3330 jobject factoryType,
3331 jobject interfaceMethodType,
3332 jobject implementationMember,
3333 jobject dynamicMethodType,
3334 jclass lambdaProxyClass))
3335 #if INCLUDE_CDS
3336 if (!CDSConfig::is_dumping_archive() || !CDSConfig::is_dumping_lambdas_in_legacy_mode()) {
3337 return;
3338 }
3339
3340 InstanceKlass* caller_ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(caller));
3341 if (caller_ik->is_hidden()) {
3342 // Hidden classes not of type lambda proxy classes are currently not being archived.
3343 // If the caller_ik is of one of the above types, the corresponding lambda proxy class won't be
3344 // registered for archiving.
3345 return;
3346 }
3347 InstanceKlass* lambda_ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(lambdaProxyClass));
3353 interface_method_name = java_lang_String::as_symbol(JNIHandles::resolve_non_null(interfaceMethodName));
3354 }
3355 Handle factory_type_oop(THREAD, JNIHandles::resolve_non_null(factoryType));
3356 Symbol* factory_type = java_lang_invoke_MethodType::as_signature(factory_type_oop(), true);
3357
3358 Handle interface_method_type_oop(THREAD, JNIHandles::resolve_non_null(interfaceMethodType));
3359 Symbol* interface_method_type = java_lang_invoke_MethodType::as_signature(interface_method_type_oop(), true);
3360
3361 Handle implementation_member_oop(THREAD, JNIHandles::resolve_non_null(implementationMember));
3362 assert(java_lang_invoke_MemberName::is_method(implementation_member_oop()), "must be");
3363 Method* m = java_lang_invoke_MemberName::vmtarget(implementation_member_oop());
3364
3365 Handle dynamic_method_type_oop(THREAD, JNIHandles::resolve_non_null(dynamicMethodType));
3366 Symbol* dynamic_method_type = java_lang_invoke_MethodType::as_signature(dynamic_method_type_oop(), true);
3367
3368 LambdaProxyClassDictionary::add_lambda_proxy_class(caller_ik, lambda_ik, interface_method_name, factory_type,
3369 interface_method_type, m, dynamic_method_type, THREAD);
3370 #endif // INCLUDE_CDS
3371 JVM_END
3372
3373 JVM_ENTRY_PROF(jclass, JVM_LookupLambdaProxyClassFromArchive, JVM_LookupLambdaProxyClassFromArchive(JNIEnv* env,
3374 jclass caller,
3375 jstring interfaceMethodName,
3376 jobject factoryType,
3377 jobject interfaceMethodType,
3378 jobject implementationMember,
3379 jobject dynamicMethodType))
3380 #if INCLUDE_CDS
3381
3382 if (interfaceMethodName == nullptr || factoryType == nullptr || interfaceMethodType == nullptr ||
3383 implementationMember == nullptr || dynamicMethodType == nullptr) {
3384 THROW_(vmSymbols::java_lang_NullPointerException(), nullptr);
3385 }
3386
3387 InstanceKlass* caller_ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(caller));
3388 if (!caller_ik->in_aot_cache()) {
3389 // there won't be a shared lambda class if the caller_ik is not in the shared archive.
3390 return nullptr;
3391 }
3392
3393 Symbol* interface_method_name = java_lang_String::as_symbol(JNIHandles::resolve_non_null(interfaceMethodName));
3397 Handle interface_method_type_oop(THREAD, JNIHandles::resolve_non_null(interfaceMethodType));
3398 Symbol* interface_method_type = java_lang_invoke_MethodType::as_signature(interface_method_type_oop(), true);
3399
3400 Handle implementation_member_oop(THREAD, JNIHandles::resolve_non_null(implementationMember));
3401 assert(java_lang_invoke_MemberName::is_method(implementation_member_oop()), "must be");
3402 Method* m = java_lang_invoke_MemberName::vmtarget(implementation_member_oop());
3403
3404 Handle dynamic_method_type_oop(THREAD, JNIHandles::resolve_non_null(dynamicMethodType));
3405 Symbol* dynamic_method_type = java_lang_invoke_MethodType::as_signature(dynamic_method_type_oop(), true);
3406
3407 InstanceKlass* loaded_lambda =
3408 LambdaProxyClassDictionary::load_shared_lambda_proxy_class(caller_ik, interface_method_name, factory_type,
3409 interface_method_type, m, dynamic_method_type,
3410 CHECK_(nullptr));
3411 return loaded_lambda == nullptr ? nullptr : (jclass) JNIHandles::make_local(THREAD, loaded_lambda->java_mirror());
3412 #else
3413 return nullptr;
3414 #endif // INCLUDE_CDS
3415 JVM_END
3416
3417 JVM_ENTRY_NO_ENV_PROF(jlong, JVM_GetRandomSeedForDumping, JVM_GetRandomSeedForDumping())
3418 if (CDSConfig::is_dumping_static_archive()) {
3419 // We do this so that the default CDS archive can be deterministic.
3420 const char* release = VM_Version::vm_release();
3421 const char* dbg_level = VM_Version::jdk_debug_level();
3422 const char* version = VM_Version::internal_vm_info_string();
3423 jlong seed = (jlong)(java_lang_String::hash_code((const jbyte*)release, (int)strlen(release)) ^
3424 java_lang_String::hash_code((const jbyte*)dbg_level, (int)strlen(dbg_level)) ^
3425 java_lang_String::hash_code((const jbyte*)version, (int)strlen(version)));
3426 seed += (jlong)VM_Version::vm_major_version();
3427 seed += (jlong)VM_Version::vm_minor_version();
3428 seed += (jlong)VM_Version::vm_security_version();
3429 seed += (jlong)VM_Version::vm_patch_version();
3430 if (seed == 0) { // don't let this ever be zero.
3431 seed = 0x87654321;
3432 }
3433 log_debug(aot)("JVM_GetRandomSeedForDumping() = " JLONG_FORMAT, seed);
3434 return seed;
3435 } else {
3436 return 0;
3437 }
3438 JVM_END
3439
3440 JVM_ENTRY_NO_ENV_PROF(jint, JVM_GetCDSConfigStatus, JVM_GetCDSConfigStatus())
3441 return CDSConfig::get_status();
3442 JVM_END
3443
3444 JVM_ENTRY_PROF(void, JVM_LogLambdaFormInvoker, JVM_LogLambdaFormInvoker(JNIEnv *env, jstring line))
3445 #if INCLUDE_CDS
3446 assert(CDSConfig::is_logging_lambda_form_invokers(), "sanity");
3447 if (line != nullptr) {
3448 ResourceMark rm(THREAD);
3449 Handle h_line (THREAD, JNIHandles::resolve_non_null(line));
3450 char* c_line = java_lang_String::as_utf8_string(h_line());
3451 if (CDSConfig::is_dumping_dynamic_archive() || CDSConfig::is_dumping_preimage_static_archive()) {
3452 // Note: LambdaFormInvokers::append take same format which is not
3453 // same as below the print format. The line does not include LAMBDA_FORM_TAG.
3454 LambdaFormInvokers::append(os::strdup((const char*)c_line, mtInternal));
3455 }
3456 if (ClassListWriter::is_enabled()) {
3457 ClassListWriter w;
3458 w.stream()->print_cr("%s %s", ClassListParser::lambda_form_tag(), c_line);
3459 }
3460 }
3461 #endif // INCLUDE_CDS
3462 JVM_END
3463
3464 JVM_ENTRY_PROF(void, JVM_LogDynamicProxy, JVM_LogDynamicProxy(JNIEnv *env, jobject loader, jstring proxy_name, jobjectArray interfaces, jint access_flags))
3465 #if INCLUDE_CDS
3466 assert(CDSConfig::is_logging_dynamic_proxies(), "sanity");
3467
3468 ResourceMark rm(THREAD);
3469 oop proxy_name_oop = JNIHandles::resolve_non_null(proxy_name);
3470 char* proxy_name_str = java_lang_String::as_utf8_string(proxy_name_oop);
3471 oop loader_oop = JNIHandles::resolve(loader);
3472 objArrayOop interfaces_oop = objArrayOop(JNIHandles::resolve_non_null(interfaces));
3473
3474 AOTConstantPoolResolver::trace_dynamic_proxy_class(loader_oop, proxy_name_str, interfaces_oop, access_flags);
3475 #endif // INCLUDE_CDS
3476 JVM_END
3477
3478 JVM_ENTRY_PROF(void, JVM_DumpClassListToFile, JVM_DumpClassListToFile(JNIEnv *env, jstring listFileName))
3479 #if INCLUDE_CDS
3480 ResourceMark rm(THREAD);
3481 Handle file_handle(THREAD, JNIHandles::resolve_non_null(listFileName));
3482 char* file_name = java_lang_String::as_utf8_string(file_handle());
3483 AOTMetaspace::dump_loaded_classes(file_name, THREAD);
3484 #endif // INCLUDE_CDS
3485 JVM_END
3486
3487 JVM_ENTRY_PROF(void, JVM_DumpDynamicArchive, JVM_DumpDynamicArchive(JNIEnv *env, jstring archiveName))
3488 #if INCLUDE_CDS
3489 ResourceMark rm(THREAD);
3490 Handle file_handle(THREAD, JNIHandles::resolve_non_null(archiveName));
3491 char* archive_name = java_lang_String::as_utf8_string(file_handle());
3492 DynamicArchive::dump_for_jcmd(archive_name, CHECK);
3493 #endif // INCLUDE_CDS
3494 JVM_END
3495
3496 JVM_ENTRY(jboolean, JVM_NeedsClassInitBarrierForCDS(JNIEnv* env, jclass cls))
3497 #if INCLUDE_CDS
3498 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
3499 if (!k->is_instance_klass()) {
3500 return false;
3501 } else {
3502 if (InstanceKlass::cast(k)->is_enum_subclass() ||
3503 AOTClassInitializer::can_archive_initialized_mirror(InstanceKlass::cast(k))) {
3504 // This class will be cached in AOT-initialized state. No need for init barriers.
3505 return false;
3506 } else {
3507 // If we cannot cache the class in AOT-initialized state, java.lang.invoke handles
3508 // must emit barriers to ensure class initialization during production run.
3509 ResourceMark rm(THREAD);
3510 log_debug(aot)("NeedsClassInitBarrierForCDS: %s", k->external_name());
3511 return true;
3512 }
3513 }
3514 #else
3515 return false;
3516 #endif // INCLUDE_CDS
3517 JVM_END
3518
3519 // Returns an array of all live Thread objects (VM internal JavaThreads,
3520 // jvmti agent threads, and JNI attaching threads are skipped)
3521 // See CR 6404306 regarding JNI attaching threads
3522 JVM_ENTRY_PROF(jobjectArray, JVM_GetAllThreads, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
3523 ResourceMark rm(THREAD);
3524 ThreadsListEnumerator tle(THREAD, false, false);
3525 JvmtiVMObjectAllocEventCollector oam;
3526
3527 int num_threads = tle.num_threads();
3528 objArrayOop r = oopFactory::new_objArray(vmClasses::Thread_klass(), num_threads, CHECK_NULL);
3529 objArrayHandle threads_ah(THREAD, r);
3530
3531 for (int i = 0; i < num_threads; i++) {
3532 Handle h = tle.get_threadObj(i);
3533 threads_ah->obj_at_put(i, h());
3534 }
3535
3536 return (jobjectArray) JNIHandles::make_local(THREAD, threads_ah());
3537 JVM_END
3538
3539
3540 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
3541 // Return StackTraceElement[][], each element is the stack trace of a thread in
3542 // the corresponding entry in the given threads array
3543 JVM_ENTRY_PROF(jobjectArray, JVM_DumpThreads, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
3544 JvmtiVMObjectAllocEventCollector oam;
3545
3546 // Check if threads is null
3547 if (threads == nullptr) {
3548 THROW_NULL(vmSymbols::java_lang_NullPointerException());
3549 }
3550
3551 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
3552 objArrayHandle ah(THREAD, a);
3553 int num_threads = ah->length();
3554 // check if threads is non-empty array
3555 if (num_threads == 0) {
3556 THROW_NULL(vmSymbols::java_lang_IllegalArgumentException());
3557 }
3558
3559 // check if threads is not an array of objects of Thread class
3560 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
3561 if (k != vmClasses::Thread_klass()) {
3562 THROW_NULL(vmSymbols::java_lang_IllegalArgumentException());
3563 }
3564
3565 ResourceMark rm(THREAD);
3566
3567 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
3568 for (int i = 0; i < num_threads; i++) {
3569 oop thread_obj = ah->obj_at(i);
3570 instanceHandle h(THREAD, (instanceOop) thread_obj);
3571 thread_handle_array->append(h);
3572 }
3573
3574 // The JavaThread references in thread_handle_array are validated
3575 // in VM_ThreadDump::doit().
3576 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
3577 return (jobjectArray)JNIHandles::make_local(THREAD, stacktraces());
3578
3579 JVM_END
3580
3581 // JVM monitoring and management support
3582 JVM_LEAF_PROF(void*, JVM_GetManagement, JVM_GetManagement(jint version))
3583 return Management::get_jmm_interface(version);
3584 JVM_END
3585
3586 // com.sun.tools.attach.VirtualMachine agent properties support
3587 //
3588 // Initialize the agent properties with the properties maintained in the VM
3589 JVM_ENTRY_PROF(jobject, JVM_InitAgentProperties, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
3590 ResourceMark rm;
3591
3592 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
3593
3594 PUTPROP(props, "sun.java.command", Arguments::java_command());
3595 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
3596 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
3597 return properties;
3598 JVM_END
3599
3600 JVM_ENTRY_PROF(jobjectArray, JVM_GetEnclosingMethodInfo, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
3601 {
3602 JvmtiVMObjectAllocEventCollector oam;
3603
3604 if (ofClass == nullptr) {
3605 return nullptr;
3606 }
3607 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
3608 // Special handling for primitive objects
3609 if (java_lang_Class::is_primitive(mirror())) {
3610 return nullptr;
3611 }
3612 Klass* k = java_lang_Class::as_Klass(mirror());
3613 if (!k->is_instance_klass()) {
3614 return nullptr;
3615 }
3616 InstanceKlass* ik = InstanceKlass::cast(k);
3617 int encl_method_class_idx = ik->enclosing_method_class_index();
3618 if (encl_method_class_idx == 0) {
3619 return nullptr;
3620 }
3623 Klass* enc_k = ik->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
3624 dest->obj_at_put(0, enc_k->java_mirror());
3625 int encl_method_method_idx = ik->enclosing_method_method_index();
3626 if (encl_method_method_idx != 0) {
3627 Symbol* sym = ik->constants()->symbol_at(
3628 extract_low_short_from_int(
3629 ik->constants()->name_and_type_at(encl_method_method_idx)));
3630 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3631 dest->obj_at_put(1, str());
3632 sym = ik->constants()->symbol_at(
3633 extract_high_short_from_int(
3634 ik->constants()->name_and_type_at(encl_method_method_idx)));
3635 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3636 dest->obj_at_put(2, str());
3637 }
3638 return (jobjectArray) JNIHandles::make_local(THREAD, dest());
3639 }
3640 JVM_END
3641
3642 // Returns an array of java.lang.String objects containing the input arguments to the VM.
3643 JVM_ENTRY_PROF(jobjectArray, JVM_GetVmArguments, JVM_GetVmArguments(JNIEnv *env))
3644 ResourceMark rm(THREAD);
3645
3646 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) {
3647 return nullptr;
3648 }
3649
3650 char** vm_flags = Arguments::jvm_flags_array();
3651 char** vm_args = Arguments::jvm_args_array();
3652 int num_flags = Arguments::num_jvm_flags();
3653 int num_args = Arguments::num_jvm_args();
3654
3655 InstanceKlass* ik = vmClasses::String_klass();
3656 objArrayOop r = oopFactory::new_objArray(ik, num_args + num_flags, CHECK_NULL);
3657 objArrayHandle result_h(THREAD, r);
3658
3659 int index = 0;
3660 for (int j = 0; j < num_flags; j++, index++) {
3661 Handle h = java_lang_String::create_from_platform_dependent_str(vm_flags[j], CHECK_NULL);
3662 result_h->obj_at_put(index, h());
3663 }
3664 for (int i = 0; i < num_args; i++, index++) {
3665 Handle h = java_lang_String::create_from_platform_dependent_str(vm_args[i], CHECK_NULL);
3666 result_h->obj_at_put(index, h());
3667 }
3668 return (jobjectArray) JNIHandles::make_local(THREAD, result_h());
3669 JVM_END
3670
3671 JVM_LEAF_PROF(jint, JVM_FindSignal, JVM_FindSignal(const char *name))
3672 return os::get_signal_number(name);
3673 JVM_END
3674
3675 JVM_ENTRY_PROF(void, JVM_VirtualThreadEndFirstTransition, JVM_VirtualThreadEndFirstTransition(JNIEnv* env, jobject vthread))
3676 oop vt = JNIHandles::resolve_external_guard(vthread);
3677 MountUnmountDisabler::end_transition(thread, vt, true /*is_mount*/, true /*is_thread_start*/);
3678 JVM_END
3679
3680 JVM_ENTRY_PROF(void, JVM_VirtualThreadStartFinalTransition, JVM_VirtualThreadStartFinalTransition(JNIEnv* env, jobject vthread))
3681 oop vt = JNIHandles::resolve_external_guard(vthread);
3682 MountUnmountDisabler::start_transition(thread, vt, false /*is_mount */, true /*is_thread_end*/);
3683 JVM_END
3684
3685 JVM_ENTRY_PROF(void, JVM_VirtualThreadStartTransition, JVM_VirtualThreadStartTransition(JNIEnv* env, jobject vthread, jboolean is_mount))
3686 oop vt = JNIHandles::resolve_external_guard(vthread);
3687 MountUnmountDisabler::start_transition(thread, vt, is_mount, false /*is_thread_end*/);
3688 JVM_END
3689
3690 JVM_ENTRY_PROF(void, JVM_VirtualThreadEndTransition, JVM_VirtualThreadEndTransition(JNIEnv* env, jobject vthread, jboolean is_mount))
3691 oop vt = JNIHandles::resolve_external_guard(vthread);
3692 MountUnmountDisabler::end_transition(thread, vt, is_mount, false /*is_thread_start*/);
3693 JVM_END
3694
3695 // Notification from VirtualThread about disabling JVMTI Suspend in a sync critical section.
3696 // Needed to avoid deadlocks with JVMTI suspend mechanism.
3697 JVM_ENTRY_PROF(void, JVM_VirtualThreadDisableSuspend, JVM_VirtualThreadDisableSuspend(JNIEnv* env, jclass clazz, jboolean enter))
3698 #if INCLUDE_JVMTI
3699 if (!DoJVMTIVirtualThreadTransitions) {
3700 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
3701 return;
3702 }
3703 assert(thread->is_disable_suspend() != (bool)enter,
3704 "nested or unbalanced monitor enter/exit is not allowed");
3705 thread->toggle_is_disable_suspend();
3706 #endif
3707 JVM_END
3708
3709 JVM_ENTRY_PROF(void, JVM_VirtualThreadPinnedEvent, JVM_VirtualThreadPinnedEvent(JNIEnv* env, jclass ignored, jstring op))
3710 #if INCLUDE_JFR
3711 freeze_result result = THREAD->last_freeze_fail_result();
3712 assert(result != freeze_ok, "sanity check");
3713 EventVirtualThreadPinned event(UNTIMED);
3714 event.set_starttime(THREAD->last_freeze_fail_time());
3715 if (event.should_commit()) {
3716 ResourceMark rm(THREAD);
3717 const char *str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(op));
3718 THREAD->post_vthread_pinned_event(&event, str, result);
3719 }
3720 #endif
3721 JVM_END
3722
3723 JVM_ENTRY_PROF(jobject, JVM_TakeVirtualThreadListToUnblock, JVM_TakeVirtualThreadListToUnblock(JNIEnv* env, jclass ignored))
3724 ParkEvent* parkEvent = ObjectMonitor::vthread_unparker_ParkEvent();
3725 assert(parkEvent != nullptr, "not initialized");
3726
3727 OopHandle& list_head = ObjectMonitor::vthread_list_head();
3728 oop vthread_head = nullptr;
3729 while (true) {
3730 if (list_head.peek() != nullptr) {
3731 for (;;) {
3732 oop head = list_head.resolve();
3733 if (list_head.cmpxchg(head, nullptr) == head) {
3734 return JNIHandles::make_local(THREAD, head);
3735 }
3736 }
3737 }
3738 ThreadBlockInVM tbivm(THREAD);
3739 parkEvent->park();
3740 }
3741 JVM_END
3742
3743 /*
3744 * Return the current class's class file version. The low order 16 bits of the
3745 * returned jint contain the class's major version. The high order 16 bits
3746 * contain the class's minor version.
3747 */
3748 JVM_ENTRY_PROF(jint, JVM_GetClassFileVersion, JVM_GetClassFileVersion(JNIEnv* env, jclass current))
3749 oop mirror = JNIHandles::resolve_non_null(current);
3750 if (java_lang_Class::is_primitive(mirror)) {
3751 // return latest major version and minor version of 0.
3752 return JVM_CLASSFILE_MAJOR_VERSION;
3753 }
3754 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(mirror);
3755 return (ik->minor_version() << 16) | ik->major_version();
3756 JVM_END
3757
3758 /*
3759 * Ensure that code doing a stackwalk and using javaVFrame::locals() to
3760 * get the value will see a materialized value and not a scalar-replaced
3761 * null value.
3762 */
3763 JVM_ENTRY_PROF(void, JVM_EnsureMaterializedForStackWalk_func, JVM_EnsureMaterializedForStackWalk_func(JNIEnv* env, jobject vthread, jobject value))
3764 JVM_EnsureMaterializedForStackWalk(env, value);
3765 JVM_END
3766
3767 /*
3768 * Return JNI_TRUE if warnings are printed when agents are dynamically loaded.
3769 */
3770 JVM_LEAF_PROF(jboolean, JVM_PrintWarningAtDynamicAgentLoad, JVM_PrintWarningAtDynamicAgentLoad(void))
3771 return (EnableDynamicAgentLoading && !FLAG_IS_CMDLINE(EnableDynamicAgentLoading)) ? JNI_TRUE : JNI_FALSE;
3772 JVM_END
3773
3774 #define DO_COUNTERS(macro) \
3775 macro(JVM_CurrentTimeMillis) \
3776 macro(JVM_NanoTime) \
3777 macro(JVM_GetNanoTimeAdjustment) \
3778 macro(JVM_ArrayCopy) \
3779 macro(JVM_GetProperties) \
3780 macro(JVM_GetTemporaryDirectory) \
3781 macro(JVM_BeforeHalt) \
3782 macro(JVM_Halt) \
3783 macro(JVM_GC) \
3784 macro(JVM_MaxObjectInspectionAge) \
3785 macro(JVM_TotalMemory) \
3786 macro(JVM_FreeMemory) \
3787 macro(JVM_MaxMemory) \
3788 macro(JVM_ActiveProcessorCount) \
3789 macro(JVM_IsUseContainerSupport) \
3790 macro(JVM_FillInStackTrace) \
3791 macro(JVM_GetExtendedNPEMessage) \
3792 macro(JVM_InitStackTraceElementArray) \
3793 macro(JVM_InitStackTraceElement) \
3794 macro(JVM_ExpandStackFrameInfo) \
3795 macro(JVM_CallStackWalk) \
3796 macro(JVM_MoreStackWalk) \
3797 macro(JVM_SetStackWalkContinuation) \
3798 macro(JVM_IHashCode) \
3799 macro(JVM_MonitorWait) \
3800 macro(JVM_MonitorNotify) \
3801 macro(JVM_MonitorNotifyAll) \
3802 macro(JVM_Clone) \
3803 macro(JVM_ReportFinalizationComplete) \
3804 macro(JVM_IsFinalizationEnabled) \
3805 macro(JVM_RegisterContinuationMethods) \
3806 macro(JVM_NativePath) \
3807 macro(JVM_GetCallerClass) \
3808 macro(JVM_FindPrimitiveClass) \
3809 macro(JVM_FindClassFromBootLoader) \
3810 macro(JVM_FindClassFromLoader) \
3811 macro(JVM_FindClassFromClass) \
3812 macro(JVM_DefineClass) \
3813 macro(JVM_LookupDefineClass) \
3814 macro(JVM_DefineClassWithSource) \
3815 macro(JVM_FindLoadedClass) \
3816 macro(JVM_DefineModule) \
3817 macro(JVM_SetBootLoaderUnnamedModule) \
3818 macro(JVM_AddModuleExports) \
3819 macro(JVM_AddModuleExportsToAllUnnamed) \
3820 macro(JVM_AddModuleExportsToAll) \
3821 macro(JVM_AddReadsModule) \
3822 macro(JVM_DefineArchivedModules) \
3823 macro(JVM_InitClassName) \
3824 macro(JVM_GetClassInterfaces) \
3825 macro(JVM_IsInterface) \
3826 macro(JVM_IsHiddenClass) \
3827 macro(JVM_FindScopedValueBindings) \
3828 macro(JVM_GetDeclaredClasses) \
3829 macro(JVM_GetDeclaringClass) \
3830 macro(JVM_GetSimpleBinaryName) \
3831 macro(JVM_GetClassSignature) \
3832 macro(JVM_GetClassAnnotations) \
3833 macro(JVM_GetClassTypeAnnotations) \
3834 macro(JVM_GetMethodTypeAnnotations) \
3835 macro(JVM_GetFieldTypeAnnotations) \
3836 macro(JVM_GetMethodParameters) \
3837 macro(JVM_GetClassDeclaredFields) \
3838 macro(JVM_IsRecord) \
3839 macro(JVM_GetRecordComponents) \
3840 macro(JVM_GetClassDeclaredMethods) \
3841 macro(JVM_GetClassDeclaredConstructors) \
3842 macro(JVM_AreNestMates) \
3843 macro(JVM_GetNestHost) \
3844 macro(JVM_GetNestMembers) \
3845 macro(JVM_GetPermittedSubclasses) \
3846 macro(JVM_GetClassConstantPool) \
3847 macro(JVM_ConstantPoolGetSize) \
3848 macro(JVM_ConstantPoolGetClassAt) \
3849 macro(JVM_ConstantPoolGetClassAtIfLoaded) \
3850 macro(JVM_ConstantPoolGetMethodAt) \
3851 macro(JVM_ConstantPoolGetMethodAtIfLoaded) \
3852 macro(JVM_ConstantPoolGetFieldAt) \
3853 macro(JVM_ConstantPoolGetFieldAtIfLoaded) \
3854 macro(JVM_ConstantPoolGetMemberRefInfoAt) \
3855 macro(JVM_ConstantPoolGetClassRefIndexAt) \
3856 macro(JVM_ConstantPoolGetNameAndTypeRefIndexAt) \
3857 macro(JVM_ConstantPoolGetNameAndTypeRefInfoAt) \
3858 macro(JVM_ConstantPoolGetIntAt) \
3859 macro(JVM_ConstantPoolGetLongAt) \
3860 macro(JVM_ConstantPoolGetFloatAt) \
3861 macro(JVM_ConstantPoolGetDoubleAt) \
3862 macro(JVM_ConstantPoolGetStringAt) \
3863 macro(JVM_ConstantPoolGetUTF8At) \
3864 macro(JVM_ConstantPoolGetTagAt) \
3865 macro(JVM_DesiredAssertionStatus) \
3866 macro(JVM_AssertionStatusDirectives) \
3867 macro(JVM_GetClassNameUTF) \
3868 macro(JVM_GetClassCPTypes) \
3869 macro(JVM_GetClassCPEntriesCount) \
3870 macro(JVM_GetClassFieldsCount) \
3871 macro(JVM_GetClassMethodsCount) \
3872 macro(JVM_GetMethodIxExceptionIndexes) \
3873 macro(JVM_GetMethodIxExceptionsCount) \
3874 macro(JVM_GetMethodIxByteCode) \
3875 macro(JVM_GetMethodIxByteCodeLength) \
3876 macro(JVM_GetMethodIxExceptionTableEntry) \
3877 macro(JVM_GetMethodIxExceptionTableLength) \
3878 macro(JVM_GetMethodIxModifiers) \
3879 macro(JVM_GetFieldIxModifiers) \
3880 macro(JVM_GetMethodIxLocalsCount) \
3881 macro(JVM_GetMethodIxArgsSize) \
3882 macro(JVM_GetMethodIxMaxStack) \
3883 macro(JVM_IsConstructorIx) \
3884 macro(JVM_IsVMGeneratedMethodIx) \
3885 macro(JVM_GetMethodIxNameUTF) \
3886 macro(JVM_GetMethodIxSignatureUTF) \
3887 macro(JVM_GetCPFieldNameUTF) \
3888 macro(JVM_GetCPMethodNameUTF) \
3889 macro(JVM_GetCPMethodSignatureUTF) \
3890 macro(JVM_GetCPFieldSignatureUTF) \
3891 macro(JVM_GetCPClassNameUTF) \
3892 macro(JVM_GetCPFieldClassNameUTF) \
3893 macro(JVM_GetCPMethodClassNameUTF) \
3894 macro(JVM_GetCPFieldModifiers) \
3895 macro(JVM_GetCPMethodModifiers) \
3896 macro(JVM_ReleaseUTF) \
3897 macro(JVM_IsSameClassPackage) \
3898 macro(JVM_StartThread) \
3899 macro(JVM_SetThreadPriority) \
3900 macro(JVM_Yield) \
3901 macro(JVM_SleepNanos) \
3902 macro(JVM_CurrentCarrierThread) \
3903 macro(JVM_CurrentThread) \
3904 macro(JVM_SetCurrentThread) \
3905 macro(JVM_GetNextThreadIdOffset) \
3906 macro(JVM_Interrupt) \
3907 macro(JVM_HoldsLock) \
3908 macro(JVM_GetStackTrace) \
3909 macro(JVM_CreateThreadSnapshot) \
3910 macro(JVM_SetNativeThreadName) \
3911 macro(JVM_ScopedValueCache) \
3912 macro(JVM_SetScopedValueCache) \
3913 macro(JVM_GetSystemPackage) \
3914 macro(JVM_GetSystemPackages) \
3915 macro(JVM_GetAndClearReferencePendingList) \
3916 macro(JVM_HasReferencePendingList) \
3917 macro(JVM_WaitForReferencePendingList) \
3918 macro(JVM_ReferenceGet) \
3919 macro(JVM_ReferenceRefersTo) \
3920 macro(JVM_ReferenceClear) \
3921 macro(JVM_PhantomReferenceRefersTo) \
3922 macro(JVM_LatestUserDefinedLoader) \
3923 macro(JVM_GetArrayLength) \
3924 macro(JVM_GetArrayElement) \
3925 macro(JVM_GetPrimitiveArrayElement) \
3926 macro(JVM_SetArrayElement) \
3927 macro(JVM_SetPrimitiveArrayElement) \
3928 macro(JVM_NewArray) \
3929 macro(JVM_NewMultiArray) \
3930 macro(JVM_LoadZipLibrary) \
3931 macro(JVM_LoadLibrary) \
3932 macro(JVM_UnloadLibrary) \
3933 macro(JVM_FindLibraryEntry) \
3934 macro(JVM_IsSupportedJNIVersion) \
3935 macro(JVM_IsPreviewEnabled) \
3936 macro(JVM_IsContinuationsSupported) \
3937 macro(JVM_IsForeignLinkerSupported) \
3938 macro(JVM_InternString) \
3939 macro(JVM_InvokeMethod) \
3940 macro(JVM_NewInstanceFromConstructor) \
3941 macro(JVM_InitializeFromArchive) \
3942 macro(JVM_RegisterLambdaProxyClassForArchiving) \
3943 macro(JVM_LookupLambdaProxyClassFromArchive) \
3944 macro(JVM_GetRandomSeedForDumping) \
3945 macro(JVM_LogLambdaFormInvoker) \
3946 macro(JVM_LogDynamicProxy) \
3947 macro(JVM_DumpClassListToFile) \
3948 macro(JVM_DumpDynamicArchive) \
3949 macro(JVM_GetAllThreads) \
3950 macro(JVM_DumpThreads) \
3951 macro(JVM_GetManagement) \
3952 macro(JVM_InitAgentProperties) \
3953 macro(JVM_GetEnclosingMethodInfo) \
3954 macro(JVM_GetVmArguments) \
3955 macro(JVM_FindSignal) \
3956 macro(JVM_GetClassFileVersion) \
3957 macro(JVM_VirtualThreadEndFirstTransition) \
3958 macro(JVM_VirtualThreadStartFinalTransition) \
3959 macro(JVM_VirtualThreadStartTransition) \
3960 macro(JVM_VirtualThreadEndTransition) \
3961 macro(JVM_VirtualThreadDisableSuspend) \
3962 macro(JVM_VirtualThreadPinnedEvent) \
3963 macro(JVM_TakeVirtualThreadListToUnblock) \
3964 macro(JVM_EnsureMaterializedForStackWalk_func) \
3965 macro(JVM_PrintWarningAtDynamicAgentLoad)
3966
3967 #define INIT_COUNTER(name) \
3968 NEWPERFTICKCOUNTERS(_perf_##name##_timer, SUN_RT, #name); \
3969 NEWPERFEVENTCOUNTER(_perf_##name##_count, SUN_RT, #name "_count"); \
3970
3971 void perf_jvm_init() {
3972 if (ProfileVMCalls && UsePerfData) {
3973 EXCEPTION_MARK;
3974
3975 DO_COUNTERS(INIT_COUNTER)
3976
3977 if (HAS_PENDING_EXCEPTION) {
3978 vm_exit_during_initialization("jvm_perf_init failed unexpectedly");
3979 }
3980 }
3981 }
3982
3983 #undef INIT_COUNTER
3984
3985 #define PRINT_COUNTER(name) {\
3986 jlong count = _perf_##name##_count->get_value(); \
3987 if (count > 0) { \
3988 st->print_cr(" %-40s = " JLONG_FORMAT_W(6) "us (elapsed) " JLONG_FORMAT_W(6) "us (thread) (" JLONG_FORMAT_W(5) " events)", \
3989 #name, \
3990 _perf_##name##_timer->elapsed_counter_value_us(), \
3991 _perf_##name##_timer->thread_counter_value_us(), count); \
3992 }}
3993
3994 void perf_jvm_print_on(outputStream* st) {
3995 if (ProfileVMCalls && UsePerfData) {
3996 DO_COUNTERS(PRINT_COUNTER)
3997 } else {
3998 st->print_cr(" JVM: no info (%s is disabled)", (UsePerfData ? "ProfileVMCalls" : "UsePerfData"));
3999 }
4000 }
4001
4002 #undef PRINT_COUNTER
|