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src/share/vm/prims/jvmtiExport.cpp@f49e0508a38a
src/share/vm/prims/jvmtiExport.cpp
Wed, 15 May 2013 11:30:54 +0200
- author
- rbackman
- date
- Wed, 15 May 2013 11:30:54 +0200
- changeset 5131
- f49e0508a38a
- parent 5095
- 0b7f78069732
- child 5421
- 825e6cb66923
- permissions
- -rw-r--r--
4965252: JvmtiExport::post_raw_field_modification jni ref handling is odd
Reviewed-by: coleenp, sspitsyn
1 /*
2 * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
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 */
25 #include "precompiled.hpp"
26 #include "classfile/systemDictionary.hpp"
27 #include "code/nmethod.hpp"
28 #include "code/pcDesc.hpp"
29 #include "code/scopeDesc.hpp"
30 #include "interpreter/interpreter.hpp"
31 #include "jvmtifiles/jvmtiEnv.hpp"
32 #include "memory/resourceArea.hpp"
33 #include "oops/objArrayKlass.hpp"
34 #include "oops/objArrayOop.hpp"
35 #include "prims/jvmtiCodeBlobEvents.hpp"
36 #include "prims/jvmtiEventController.hpp"
37 #include "prims/jvmtiEventController.inline.hpp"
38 #include "prims/jvmtiExport.hpp"
39 #include "prims/jvmtiImpl.hpp"
40 #include "prims/jvmtiManageCapabilities.hpp"
41 #include "prims/jvmtiRawMonitor.hpp"
42 #include "prims/jvmtiTagMap.hpp"
43 #include "prims/jvmtiThreadState.inline.hpp"
44 #include "runtime/arguments.hpp"
45 #include "runtime/handles.hpp"
46 #include "runtime/interfaceSupport.hpp"
47 #include "runtime/objectMonitor.hpp"
48 #include "runtime/objectMonitor.inline.hpp"
49 #include "runtime/thread.hpp"
50 #include "runtime/vframe.hpp"
51 #include "services/attachListener.hpp"
52 #include "services/serviceUtil.hpp"
53 #include "utilities/macros.hpp"
54 #if INCLUDE_ALL_GCS
55 #include "gc_implementation/parallelScavenge/psMarkSweep.hpp"
56 #endif // INCLUDE_ALL_GCS
58 #ifdef JVMTI_TRACE
59 #define EVT_TRACE(evt,out) if ((JvmtiTrace::event_trace_flags(evt) & JvmtiTrace::SHOW_EVENT_SENT) != 0) { SafeResourceMark rm; tty->print_cr out; }
60 #define EVT_TRIG_TRACE(evt,out) if ((JvmtiTrace::event_trace_flags(evt) & JvmtiTrace::SHOW_EVENT_TRIGGER) != 0) { SafeResourceMark rm; tty->print_cr out; }
61 #else
62 #define EVT_TRIG_TRACE(evt,out)
63 #define EVT_TRACE(evt,out)
64 #endif
66 ///////////////////////////////////////////////////////////////
67 //
68 // JvmtiEventTransition
69 //
70 // TO DO --
71 // more handle purging
73 // Use this for JavaThreads and state is _thread_in_vm.
74 class JvmtiJavaThreadEventTransition : StackObj {
75 private:
76 ResourceMark _rm;
77 ThreadToNativeFromVM _transition;
78 HandleMark _hm;
80 public:
81 JvmtiJavaThreadEventTransition(JavaThread *thread) :
82 _rm(),
83 _transition(thread),
84 _hm(thread) {};
85 };
87 // For JavaThreads which are not in _thread_in_vm state
88 // and other system threads use this.
89 class JvmtiThreadEventTransition : StackObj {
90 private:
91 ResourceMark _rm;
92 HandleMark _hm;
93 JavaThreadState _saved_state;
94 JavaThread *_jthread;
96 public:
97 JvmtiThreadEventTransition(Thread *thread) : _rm(), _hm() {
98 if (thread->is_Java_thread()) {
99 _jthread = (JavaThread *)thread;
100 _saved_state = _jthread->thread_state();
101 if (_saved_state == _thread_in_Java) {
102 ThreadStateTransition::transition_from_java(_jthread, _thread_in_native);
103 } else {
104 ThreadStateTransition::transition(_jthread, _saved_state, _thread_in_native);
105 }
106 } else {
107 _jthread = NULL;
108 }
109 }
111 ~JvmtiThreadEventTransition() {
112 if (_jthread != NULL)
113 ThreadStateTransition::transition_from_native(_jthread, _saved_state);
114 }
115 };
118 ///////////////////////////////////////////////////////////////
119 //
120 // JvmtiEventMark
121 //
123 class JvmtiEventMark : public StackObj {
124 private:
125 JavaThread *_thread;
126 JNIEnv* _jni_env;
127 bool _exception_detected;
128 bool _exception_caught;
129 #if 0
130 JNIHandleBlock* _hblock;
131 #endif
133 public:
134 JvmtiEventMark(JavaThread *thread) : _thread(thread),
135 _jni_env(thread->jni_environment()) {
136 #if 0
137 _hblock = thread->active_handles();
138 _hblock->clear_thoroughly(); // so we can be safe
139 #else
140 // we want to use the code above - but that needs the JNIHandle changes - later...
141 // for now, steal JNI push local frame code
142 JvmtiThreadState *state = thread->jvmti_thread_state();
143 // we are before an event.
144 // Save current jvmti thread exception state.
145 if (state != NULL) {
146 _exception_detected = state->is_exception_detected();
147 _exception_caught = state->is_exception_caught();
148 } else {
149 _exception_detected = false;
150 _exception_caught = false;
151 }
153 JNIHandleBlock* old_handles = thread->active_handles();
154 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread);
155 assert(new_handles != NULL, "should not be NULL");
156 new_handles->set_pop_frame_link(old_handles);
157 thread->set_active_handles(new_handles);
158 #endif
159 assert(thread == JavaThread::current(), "thread must be current!");
160 thread->frame_anchor()->make_walkable(thread);
161 };
163 ~JvmtiEventMark() {
164 #if 0
165 _hblock->clear(); // for consistency with future correct behavior
166 #else
167 // we want to use the code above - but that needs the JNIHandle changes - later...
168 // for now, steal JNI pop local frame code
169 JNIHandleBlock* old_handles = _thread->active_handles();
170 JNIHandleBlock* new_handles = old_handles->pop_frame_link();
171 assert(new_handles != NULL, "should not be NULL");
172 _thread->set_active_handles(new_handles);
173 // Note that we set the pop_frame_link to NULL explicitly, otherwise
174 // the release_block call will release the blocks.
175 old_handles->set_pop_frame_link(NULL);
176 JNIHandleBlock::release_block(old_handles, _thread); // may block
177 #endif
179 JvmtiThreadState* state = _thread->jvmti_thread_state();
180 // we are continuing after an event.
181 if (state != NULL) {
182 // Restore the jvmti thread exception state.
183 if (_exception_detected) {
184 state->set_exception_detected();
185 }
186 if (_exception_caught) {
187 state->set_exception_caught();
188 }
189 }
190 }
192 #if 0
193 jobject to_jobject(oop obj) { return obj == NULL? NULL : _hblock->allocate_handle_fast(obj); }
194 #else
195 // we want to use the code above - but that needs the JNIHandle changes - later...
196 // for now, use regular make_local
197 jobject to_jobject(oop obj) { return JNIHandles::make_local(_thread,obj); }
198 #endif
200 jclass to_jclass(Klass* klass) { return (klass == NULL ? NULL : (jclass)to_jobject(klass->java_mirror())); }
202 jmethodID to_jmethodID(methodHandle method) { return method->jmethod_id(); }
204 JNIEnv* jni_env() { return _jni_env; }
205 };
207 class JvmtiThreadEventMark : public JvmtiEventMark {
208 private:
209 jthread _jt;
211 public:
212 JvmtiThreadEventMark(JavaThread *thread) :
213 JvmtiEventMark(thread) {
214 _jt = (jthread)(to_jobject(thread->threadObj()));
215 };
216 jthread jni_thread() { return _jt; }
217 };
219 class JvmtiClassEventMark : public JvmtiThreadEventMark {
220 private:
221 jclass _jc;
223 public:
224 JvmtiClassEventMark(JavaThread *thread, Klass* klass) :
225 JvmtiThreadEventMark(thread) {
226 _jc = to_jclass(klass);
227 };
228 jclass jni_class() { return _jc; }
229 };
231 class JvmtiMethodEventMark : public JvmtiThreadEventMark {
232 private:
233 jmethodID _mid;
235 public:
236 JvmtiMethodEventMark(JavaThread *thread, methodHandle method) :
237 JvmtiThreadEventMark(thread),
238 _mid(to_jmethodID(method)) {};
239 jmethodID jni_methodID() { return _mid; }
240 };
242 class JvmtiLocationEventMark : public JvmtiMethodEventMark {
243 private:
244 jlocation _loc;
246 public:
247 JvmtiLocationEventMark(JavaThread *thread, methodHandle method, address location) :
248 JvmtiMethodEventMark(thread, method),
249 _loc(location - method->code_base()) {};
250 jlocation location() { return _loc; }
251 };
253 class JvmtiExceptionEventMark : public JvmtiLocationEventMark {
254 private:
255 jobject _exc;
257 public:
258 JvmtiExceptionEventMark(JavaThread *thread, methodHandle method, address location, Handle exception) :
259 JvmtiLocationEventMark(thread, method, location),
260 _exc(to_jobject(exception())) {};
261 jobject exception() { return _exc; }
262 };
264 class JvmtiClassFileLoadEventMark : public JvmtiThreadEventMark {
265 private:
266 const char *_class_name;
267 jobject _jloader;
268 jobject _protection_domain;
269 jclass _class_being_redefined;
271 public:
272 JvmtiClassFileLoadEventMark(JavaThread *thread, Symbol* name,
273 Handle class_loader, Handle prot_domain, KlassHandle *class_being_redefined) : JvmtiThreadEventMark(thread) {
274 _class_name = name != NULL? name->as_utf8() : NULL;
275 _jloader = (jobject)to_jobject(class_loader());
276 _protection_domain = (jobject)to_jobject(prot_domain());
277 if (class_being_redefined == NULL) {
278 _class_being_redefined = NULL;
279 } else {
280 _class_being_redefined = (jclass)to_jclass((*class_being_redefined)());
281 }
282 };
283 const char *class_name() {
284 return _class_name;
285 }
286 jobject jloader() {
287 return _jloader;
288 }
289 jobject protection_domain() {
290 return _protection_domain;
291 }
292 jclass class_being_redefined() {
293 return _class_being_redefined;
294 }
295 };
297 //////////////////////////////////////////////////////////////////////////////
299 int JvmtiExport::_field_access_count = 0;
300 int JvmtiExport::_field_modification_count = 0;
302 bool JvmtiExport::_can_access_local_variables = false;
303 bool JvmtiExport::_can_hotswap_or_post_breakpoint = false;
304 bool JvmtiExport::_can_modify_any_class = false;
305 bool JvmtiExport::_can_walk_any_space = false;
307 bool JvmtiExport::_has_redefined_a_class = false;
308 bool JvmtiExport::_all_dependencies_are_recorded = false;
310 //
311 // field access management
312 //
314 // interpreter generator needs the address of the counter
315 address JvmtiExport::get_field_access_count_addr() {
316 // We don't grab a lock because we don't want to
317 // serialize field access between all threads. This means that a
318 // thread on another processor can see the wrong count value and
319 // may either miss making a needed call into post_field_access()
320 // or will make an unneeded call into post_field_access(). We pay
321 // this price to avoid slowing down the VM when we aren't watching
322 // field accesses.
323 // Other access/mutation safe by virtue of being in VM state.
324 return (address)(&_field_access_count);
325 }
327 //
328 // field modification management
329 //
331 // interpreter generator needs the address of the counter
332 address JvmtiExport::get_field_modification_count_addr() {
333 // We don't grab a lock because we don't
334 // want to serialize field modification between all threads. This
335 // means that a thread on another processor can see the wrong
336 // count value and may either miss making a needed call into
337 // post_field_modification() or will make an unneeded call into
338 // post_field_modification(). We pay this price to avoid slowing
339 // down the VM when we aren't watching field modifications.
340 // Other access/mutation safe by virtue of being in VM state.
341 return (address)(&_field_modification_count);
342 }
345 ///////////////////////////////////////////////////////////////
346 // Functions needed by java.lang.instrument for starting up javaagent.
347 ///////////////////////////////////////////////////////////////
349 jint
350 JvmtiExport::get_jvmti_interface(JavaVM *jvm, void **penv, jint version) {
351 // The JVMTI_VERSION_INTERFACE_JVMTI part of the version number
352 // has already been validated in JNI GetEnv().
353 int major, minor, micro;
355 // micro version doesn't matter here (yet?)
356 decode_version_values(version, &major, &minor, µ);
357 switch (major) {
358 case 1:
359 switch (minor) {
360 case 0: // version 1.0.<micro> is recognized
361 case 1: // version 1.1.<micro> is recognized
362 case 2: // version 1.2.<micro> is recognized
363 break;
365 default:
366 return JNI_EVERSION; // unsupported minor version number
367 }
368 break;
369 default:
370 return JNI_EVERSION; // unsupported major version number
371 }
373 if (JvmtiEnv::get_phase() == JVMTI_PHASE_LIVE) {
374 JavaThread* current_thread = (JavaThread*) ThreadLocalStorage::thread();
375 // transition code: native to VM
376 ThreadInVMfromNative __tiv(current_thread);
377 VM_ENTRY_BASE(jvmtiEnv*, JvmtiExport::get_jvmti_interface, current_thread)
378 debug_only(VMNativeEntryWrapper __vew;)
380 JvmtiEnv *jvmti_env = JvmtiEnv::create_a_jvmti(version);
381 *penv = jvmti_env->jvmti_external(); // actual type is jvmtiEnv* -- not to be confused with JvmtiEnv*
382 return JNI_OK;
384 } else if (JvmtiEnv::get_phase() == JVMTI_PHASE_ONLOAD) {
385 // not live, no thread to transition
386 JvmtiEnv *jvmti_env = JvmtiEnv::create_a_jvmti(version);
387 *penv = jvmti_env->jvmti_external(); // actual type is jvmtiEnv* -- not to be confused with JvmtiEnv*
388 return JNI_OK;
390 } else {
391 // Called at the wrong time
392 *penv = NULL;
393 return JNI_EDETACHED;
394 }
395 }
398 void
399 JvmtiExport::decode_version_values(jint version, int * major, int * minor,
400 int * micro) {
401 *major = (version & JVMTI_VERSION_MASK_MAJOR) >> JVMTI_VERSION_SHIFT_MAJOR;
402 *minor = (version & JVMTI_VERSION_MASK_MINOR) >> JVMTI_VERSION_SHIFT_MINOR;
403 *micro = (version & JVMTI_VERSION_MASK_MICRO) >> JVMTI_VERSION_SHIFT_MICRO;
404 }
406 void JvmtiExport::enter_primordial_phase() {
407 JvmtiEnvBase::set_phase(JVMTI_PHASE_PRIMORDIAL);
408 }
410 void JvmtiExport::enter_start_phase() {
411 JvmtiManageCapabilities::recompute_always_capabilities();
412 JvmtiEnvBase::set_phase(JVMTI_PHASE_START);
413 }
415 void JvmtiExport::enter_onload_phase() {
416 JvmtiEnvBase::set_phase(JVMTI_PHASE_ONLOAD);
417 }
419 void JvmtiExport::enter_live_phase() {
420 JvmtiEnvBase::set_phase(JVMTI_PHASE_LIVE);
421 }
423 //
424 // JVMTI events that the VM posts to the debugger and also startup agent
425 // and call the agent's premain() for java.lang.instrument.
426 //
428 void JvmtiExport::post_vm_start() {
429 EVT_TRIG_TRACE(JVMTI_EVENT_VM_START, ("JVMTI Trg VM start event triggered" ));
431 // can now enable some events
432 JvmtiEventController::vm_start();
434 JvmtiEnvIterator it;
435 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
436 if (env->is_enabled(JVMTI_EVENT_VM_START)) {
437 EVT_TRACE(JVMTI_EVENT_VM_START, ("JVMTI Evt VM start event sent" ));
439 JavaThread *thread = JavaThread::current();
440 JvmtiThreadEventMark jem(thread);
441 JvmtiJavaThreadEventTransition jet(thread);
442 jvmtiEventVMStart callback = env->callbacks()->VMStart;
443 if (callback != NULL) {
444 (*callback)(env->jvmti_external(), jem.jni_env());
445 }
446 }
447 }
448 }
451 void JvmtiExport::post_vm_initialized() {
452 EVT_TRIG_TRACE(JVMTI_EVENT_VM_INIT, ("JVMTI Trg VM init event triggered" ));
454 // can now enable events
455 JvmtiEventController::vm_init();
457 JvmtiEnvIterator it;
458 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
459 if (env->is_enabled(JVMTI_EVENT_VM_INIT)) {
460 EVT_TRACE(JVMTI_EVENT_VM_INIT, ("JVMTI Evt VM init event sent" ));
462 JavaThread *thread = JavaThread::current();
463 JvmtiThreadEventMark jem(thread);
464 JvmtiJavaThreadEventTransition jet(thread);
465 jvmtiEventVMInit callback = env->callbacks()->VMInit;
466 if (callback != NULL) {
467 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread());
468 }
469 }
470 }
471 }
474 void JvmtiExport::post_vm_death() {
475 EVT_TRIG_TRACE(JVMTI_EVENT_VM_DEATH, ("JVMTI Trg VM death event triggered" ));
477 JvmtiEnvIterator it;
478 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
479 if (env->is_enabled(JVMTI_EVENT_VM_DEATH)) {
480 EVT_TRACE(JVMTI_EVENT_VM_DEATH, ("JVMTI Evt VM death event sent" ));
482 JavaThread *thread = JavaThread::current();
483 JvmtiEventMark jem(thread);
484 JvmtiJavaThreadEventTransition jet(thread);
485 jvmtiEventVMDeath callback = env->callbacks()->VMDeath;
486 if (callback != NULL) {
487 (*callback)(env->jvmti_external(), jem.jni_env());
488 }
489 }
490 }
492 JvmtiEnvBase::set_phase(JVMTI_PHASE_DEAD);
493 JvmtiEventController::vm_death();
494 }
496 char**
497 JvmtiExport::get_all_native_method_prefixes(int* count_ptr) {
498 // Have to grab JVMTI thread state lock to be sure environment doesn't
499 // go away while we iterate them. No locks during VM bring-up.
500 if (Threads::number_of_threads() == 0 || SafepointSynchronize::is_at_safepoint()) {
501 return JvmtiEnvBase::get_all_native_method_prefixes(count_ptr);
502 } else {
503 MutexLocker mu(JvmtiThreadState_lock);
504 return JvmtiEnvBase::get_all_native_method_prefixes(count_ptr);
505 }
506 }
508 class JvmtiClassFileLoadHookPoster : public StackObj {
509 private:
510 Symbol* _h_name;
511 Handle _class_loader;
512 Handle _h_protection_domain;
513 unsigned char ** _data_ptr;
514 unsigned char ** _end_ptr;
515 JavaThread * _thread;
516 jint _curr_len;
517 unsigned char * _curr_data;
518 JvmtiEnv * _curr_env;
519 jint * _cached_length_ptr;
520 unsigned char ** _cached_data_ptr;
521 JvmtiThreadState * _state;
522 KlassHandle * _h_class_being_redefined;
523 JvmtiClassLoadKind _load_kind;
525 public:
526 inline JvmtiClassFileLoadHookPoster(Symbol* h_name, Handle class_loader,
527 Handle h_protection_domain,
528 unsigned char **data_ptr, unsigned char **end_ptr,
529 unsigned char **cached_data_ptr,
530 jint *cached_length_ptr) {
531 _h_name = h_name;
532 _class_loader = class_loader;
533 _h_protection_domain = h_protection_domain;
534 _data_ptr = data_ptr;
535 _end_ptr = end_ptr;
536 _thread = JavaThread::current();
537 _curr_len = *end_ptr - *data_ptr;
538 _curr_data = *data_ptr;
539 _curr_env = NULL;
540 _cached_length_ptr = cached_length_ptr;
541 _cached_data_ptr = cached_data_ptr;
543 _state = _thread->jvmti_thread_state();
544 if (_state != NULL) {
545 _h_class_being_redefined = _state->get_class_being_redefined();
546 _load_kind = _state->get_class_load_kind();
547 // Clear class_being_redefined flag here. The action
548 // from agent handler could generate a new class file load
549 // hook event and if it is not cleared the new event generated
550 // from regular class file load could have this stale redefined
551 // class handle info.
552 _state->clear_class_being_redefined();
553 } else {
554 // redefine and retransform will always set the thread state
555 _h_class_being_redefined = (KlassHandle *) NULL;
556 _load_kind = jvmti_class_load_kind_load;
557 }
558 }
560 void post() {
561 // EVT_TRIG_TRACE(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK,
562 // ("JVMTI [%s] class file load hook event triggered",
563 // JvmtiTrace::safe_get_thread_name(_thread)));
564 post_all_envs();
565 copy_modified_data();
566 }
568 private:
569 void post_all_envs() {
570 if (_load_kind != jvmti_class_load_kind_retransform) {
571 // for class load and redefine,
572 // call the non-retransformable agents
573 JvmtiEnvIterator it;
574 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
575 if (!env->is_retransformable() && env->is_enabled(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK)) {
576 // non-retransformable agents cannot retransform back,
577 // so no need to cache the original class file bytes
578 post_to_env(env, false);
579 }
580 }
581 }
582 JvmtiEnvIterator it;
583 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
584 // retransformable agents get all events
585 if (env->is_retransformable() && env->is_enabled(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK)) {
586 // retransformable agents need to cache the original class file
587 // bytes if changes are made via the ClassFileLoadHook
588 post_to_env(env, true);
589 }
590 }
591 }
593 void post_to_env(JvmtiEnv* env, bool caching_needed) {
594 unsigned char *new_data = NULL;
595 jint new_len = 0;
596 // EVT_TRACE(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK,
597 // ("JVMTI [%s] class file load hook event sent %s data_ptr = %d, data_len = %d",
598 // JvmtiTrace::safe_get_thread_name(_thread),
599 // _h_name == NULL ? "NULL" : _h_name->as_utf8(),
600 // _curr_data, _curr_len ));
601 JvmtiClassFileLoadEventMark jem(_thread, _h_name, _class_loader,
602 _h_protection_domain,
603 _h_class_being_redefined);
604 JvmtiJavaThreadEventTransition jet(_thread);
605 JNIEnv* jni_env = (JvmtiEnv::get_phase() == JVMTI_PHASE_PRIMORDIAL)?
606 NULL : jem.jni_env();
607 jvmtiEventClassFileLoadHook callback = env->callbacks()->ClassFileLoadHook;
608 if (callback != NULL) {
609 (*callback)(env->jvmti_external(), jni_env,
610 jem.class_being_redefined(),
611 jem.jloader(), jem.class_name(),
612 jem.protection_domain(),
613 _curr_len, _curr_data,
614 &new_len, &new_data);
615 }
616 if (new_data != NULL) {
617 // this agent has modified class data.
618 if (caching_needed && *_cached_data_ptr == NULL) {
619 // data has been changed by the new retransformable agent
620 // and it hasn't already been cached, cache it
621 *_cached_data_ptr = (unsigned char *)os::malloc(_curr_len, mtInternal);
622 if (*_cached_data_ptr == NULL) {
623 vm_exit_out_of_memory(_curr_len, OOM_MALLOC_ERROR, "unable to allocate cached copy of original class bytes");
624 }
625 memcpy(*_cached_data_ptr, _curr_data, _curr_len);
626 *_cached_length_ptr = _curr_len;
627 }
629 if (_curr_data != *_data_ptr) {
630 // curr_data is previous agent modified class data.
631 // And this has been changed by the new agent so
632 // we can delete it now.
633 _curr_env->Deallocate(_curr_data);
634 }
636 // Class file data has changed by the current agent.
637 _curr_data = new_data;
638 _curr_len = new_len;
639 // Save the current agent env we need this to deallocate the
640 // memory allocated by this agent.
641 _curr_env = env;
642 }
643 }
645 void copy_modified_data() {
646 // if one of the agent has modified class file data.
647 // Copy modified class data to new resources array.
648 if (_curr_data != *_data_ptr) {
649 *_data_ptr = NEW_RESOURCE_ARRAY(u1, _curr_len);
650 memcpy(*_data_ptr, _curr_data, _curr_len);
651 *_end_ptr = *_data_ptr + _curr_len;
652 _curr_env->Deallocate(_curr_data);
653 }
654 }
655 };
657 bool JvmtiExport::_should_post_class_file_load_hook = false;
659 // this entry is for class file load hook on class load, redefine and retransform
660 void JvmtiExport::post_class_file_load_hook(Symbol* h_name,
661 Handle class_loader,
662 Handle h_protection_domain,
663 unsigned char **data_ptr,
664 unsigned char **end_ptr,
665 unsigned char **cached_data_ptr,
666 jint *cached_length_ptr) {
667 JvmtiClassFileLoadHookPoster poster(h_name, class_loader,
668 h_protection_domain,
669 data_ptr, end_ptr,
670 cached_data_ptr,
671 cached_length_ptr);
672 poster.post();
673 }
675 void JvmtiExport::report_unsupported(bool on) {
676 // If any JVMTI service is turned on, we need to exit before native code
677 // tries to access nonexistant services.
678 if (on) {
679 vm_exit_during_initialization("Java Kernel does not support JVMTI.");
680 }
681 }
684 static inline Klass* oop_to_klass(oop obj) {
685 Klass* k = obj->klass();
687 // if the object is a java.lang.Class then return the java mirror
688 if (k == SystemDictionary::Class_klass()) {
689 if (!java_lang_Class::is_primitive(obj)) {
690 k = java_lang_Class::as_Klass(obj);
691 assert(k != NULL, "class for non-primitive mirror must exist");
692 }
693 }
694 return k;
695 }
697 class JvmtiVMObjectAllocEventMark : public JvmtiClassEventMark {
698 private:
699 jobject _jobj;
700 jlong _size;
701 public:
702 JvmtiVMObjectAllocEventMark(JavaThread *thread, oop obj) : JvmtiClassEventMark(thread, oop_to_klass(obj)) {
703 _jobj = (jobject)to_jobject(obj);
704 _size = obj->size() * wordSize;
705 };
706 jobject jni_jobject() { return _jobj; }
707 jlong size() { return _size; }
708 };
710 class JvmtiCompiledMethodLoadEventMark : public JvmtiMethodEventMark {
711 private:
712 jint _code_size;
713 const void *_code_data;
714 jint _map_length;
715 jvmtiAddrLocationMap *_map;
716 const void *_compile_info;
717 public:
718 JvmtiCompiledMethodLoadEventMark(JavaThread *thread, nmethod *nm, void* compile_info_ptr = NULL)
719 : JvmtiMethodEventMark(thread,methodHandle(thread, nm->method())) {
720 _code_data = nm->insts_begin();
721 _code_size = nm->insts_size();
722 _compile_info = compile_info_ptr; // Set void pointer of compiledMethodLoad Event. Default value is NULL.
723 JvmtiCodeBlobEvents::build_jvmti_addr_location_map(nm, &_map, &_map_length);
724 }
725 ~JvmtiCompiledMethodLoadEventMark() {
726 FREE_C_HEAP_ARRAY(jvmtiAddrLocationMap, _map, mtInternal);
727 }
729 jint code_size() { return _code_size; }
730 const void *code_data() { return _code_data; }
731 jint map_length() { return _map_length; }
732 const jvmtiAddrLocationMap* map() { return _map; }
733 const void *compile_info() { return _compile_info; }
734 };
738 class JvmtiMonitorEventMark : public JvmtiThreadEventMark {
739 private:
740 jobject _jobj;
741 public:
742 JvmtiMonitorEventMark(JavaThread *thread, oop object)
743 : JvmtiThreadEventMark(thread){
744 _jobj = to_jobject(object);
745 }
746 jobject jni_object() { return _jobj; }
747 };
749 ///////////////////////////////////////////////////////////////
750 //
751 // pending CompiledMethodUnload support
752 //
754 void JvmtiExport::post_compiled_method_unload(
755 jmethodID method, const void *code_begin) {
756 JavaThread* thread = JavaThread::current();
757 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_UNLOAD,
758 ("JVMTI [%s] method compile unload event triggered",
759 JvmtiTrace::safe_get_thread_name(thread)));
761 // post the event for each environment that has this event enabled.
762 JvmtiEnvIterator it;
763 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
764 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_UNLOAD)) {
766 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_UNLOAD,
767 ("JVMTI [%s] class compile method unload event sent jmethodID " PTR_FORMAT,
768 JvmtiTrace::safe_get_thread_name(thread), method));
770 ResourceMark rm(thread);
772 JvmtiEventMark jem(thread);
773 JvmtiJavaThreadEventTransition jet(thread);
774 jvmtiEventCompiledMethodUnload callback = env->callbacks()->CompiledMethodUnload;
775 if (callback != NULL) {
776 (*callback)(env->jvmti_external(), method, code_begin);
777 }
778 }
779 }
780 }
782 ///////////////////////////////////////////////////////////////
783 //
784 // JvmtiExport
785 //
787 void JvmtiExport::post_raw_breakpoint(JavaThread *thread, Method* method, address location) {
788 HandleMark hm(thread);
789 methodHandle mh(thread, method);
791 JvmtiThreadState *state = thread->jvmti_thread_state();
792 if (state == NULL) {
793 return;
794 }
795 EVT_TRIG_TRACE(JVMTI_EVENT_BREAKPOINT, ("JVMTI [%s] Trg Breakpoint triggered",
796 JvmtiTrace::safe_get_thread_name(thread)));
797 JvmtiEnvThreadStateIterator it(state);
798 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
799 ets->compare_and_set_current_location(mh(), location, JVMTI_EVENT_BREAKPOINT);
800 if (!ets->breakpoint_posted() && ets->is_enabled(JVMTI_EVENT_BREAKPOINT)) {
801 ThreadState old_os_state = thread->osthread()->get_state();
802 thread->osthread()->set_state(BREAKPOINTED);
803 EVT_TRACE(JVMTI_EVENT_BREAKPOINT, ("JVMTI [%s] Evt Breakpoint sent %s.%s @ %d",
804 JvmtiTrace::safe_get_thread_name(thread),
805 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
806 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
807 location - mh()->code_base() ));
809 JvmtiEnv *env = ets->get_env();
810 JvmtiLocationEventMark jem(thread, mh, location);
811 JvmtiJavaThreadEventTransition jet(thread);
812 jvmtiEventBreakpoint callback = env->callbacks()->Breakpoint;
813 if (callback != NULL) {
814 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
815 jem.jni_methodID(), jem.location());
816 }
818 ets->set_breakpoint_posted();
819 thread->osthread()->set_state(old_os_state);
820 }
821 }
822 }
824 //////////////////////////////////////////////////////////////////////////////
826 bool JvmtiExport::_can_get_source_debug_extension = false;
827 bool JvmtiExport::_can_maintain_original_method_order = false;
828 bool JvmtiExport::_can_post_interpreter_events = false;
829 bool JvmtiExport::_can_post_on_exceptions = false;
830 bool JvmtiExport::_can_post_breakpoint = false;
831 bool JvmtiExport::_can_post_field_access = false;
832 bool JvmtiExport::_can_post_field_modification = false;
833 bool JvmtiExport::_can_post_method_entry = false;
834 bool JvmtiExport::_can_post_method_exit = false;
835 bool JvmtiExport::_can_pop_frame = false;
836 bool JvmtiExport::_can_force_early_return = false;
838 bool JvmtiExport::_should_post_single_step = false;
839 bool JvmtiExport::_should_post_field_access = false;
840 bool JvmtiExport::_should_post_field_modification = false;
841 bool JvmtiExport::_should_post_class_load = false;
842 bool JvmtiExport::_should_post_class_prepare = false;
843 bool JvmtiExport::_should_post_class_unload = false;
844 bool JvmtiExport::_should_post_thread_life = false;
845 bool JvmtiExport::_should_clean_up_heap_objects = false;
846 bool JvmtiExport::_should_post_native_method_bind = false;
847 bool JvmtiExport::_should_post_dynamic_code_generated = false;
848 bool JvmtiExport::_should_post_data_dump = false;
849 bool JvmtiExport::_should_post_compiled_method_load = false;
850 bool JvmtiExport::_should_post_compiled_method_unload = false;
851 bool JvmtiExport::_should_post_monitor_contended_enter = false;
852 bool JvmtiExport::_should_post_monitor_contended_entered = false;
853 bool JvmtiExport::_should_post_monitor_wait = false;
854 bool JvmtiExport::_should_post_monitor_waited = false;
855 bool JvmtiExport::_should_post_garbage_collection_start = false;
856 bool JvmtiExport::_should_post_garbage_collection_finish = false;
857 bool JvmtiExport::_should_post_object_free = false;
858 bool JvmtiExport::_should_post_resource_exhausted = false;
859 bool JvmtiExport::_should_post_vm_object_alloc = false;
860 bool JvmtiExport::_should_post_on_exceptions = false;
862 ////////////////////////////////////////////////////////////////////////////////////////////////
865 //
866 // JVMTI single step management
867 //
868 void JvmtiExport::at_single_stepping_point(JavaThread *thread, Method* method, address location) {
869 assert(JvmtiExport::should_post_single_step(), "must be single stepping");
871 HandleMark hm(thread);
872 methodHandle mh(thread, method);
874 // update information about current location and post a step event
875 JvmtiThreadState *state = thread->jvmti_thread_state();
876 if (state == NULL) {
877 return;
878 }
879 EVT_TRIG_TRACE(JVMTI_EVENT_SINGLE_STEP, ("JVMTI [%s] Trg Single Step triggered",
880 JvmtiTrace::safe_get_thread_name(thread)));
881 if (!state->hide_single_stepping()) {
882 if (state->is_pending_step_for_popframe()) {
883 state->process_pending_step_for_popframe();
884 }
885 if (state->is_pending_step_for_earlyret()) {
886 state->process_pending_step_for_earlyret();
887 }
888 JvmtiExport::post_single_step(thread, mh(), location);
889 }
890 }
893 void JvmtiExport::expose_single_stepping(JavaThread *thread) {
894 JvmtiThreadState *state = thread->jvmti_thread_state();
895 if (state != NULL) {
896 state->clear_hide_single_stepping();
897 }
898 }
901 bool JvmtiExport::hide_single_stepping(JavaThread *thread) {
902 JvmtiThreadState *state = thread->jvmti_thread_state();
903 if (state != NULL && state->is_enabled(JVMTI_EVENT_SINGLE_STEP)) {
904 state->set_hide_single_stepping();
905 return true;
906 } else {
907 return false;
908 }
909 }
911 void JvmtiExport::post_class_load(JavaThread *thread, Klass* klass) {
912 HandleMark hm(thread);
913 KlassHandle kh(thread, klass);
915 EVT_TRIG_TRACE(JVMTI_EVENT_CLASS_LOAD, ("JVMTI [%s] Trg Class Load triggered",
916 JvmtiTrace::safe_get_thread_name(thread)));
917 JvmtiThreadState* state = thread->jvmti_thread_state();
918 if (state == NULL) {
919 return;
920 }
921 JvmtiEnvThreadStateIterator it(state);
922 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
923 if (ets->is_enabled(JVMTI_EVENT_CLASS_LOAD)) {
924 EVT_TRACE(JVMTI_EVENT_CLASS_LOAD, ("JVMTI [%s] Evt Class Load sent %s",
925 JvmtiTrace::safe_get_thread_name(thread),
926 kh()==NULL? "NULL" : kh()->external_name() ));
928 JvmtiEnv *env = ets->get_env();
929 JvmtiClassEventMark jem(thread, kh());
930 JvmtiJavaThreadEventTransition jet(thread);
931 jvmtiEventClassLoad callback = env->callbacks()->ClassLoad;
932 if (callback != NULL) {
933 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_class());
934 }
935 }
936 }
937 }
940 void JvmtiExport::post_class_prepare(JavaThread *thread, Klass* klass) {
941 HandleMark hm(thread);
942 KlassHandle kh(thread, klass);
944 EVT_TRIG_TRACE(JVMTI_EVENT_CLASS_PREPARE, ("JVMTI [%s] Trg Class Prepare triggered",
945 JvmtiTrace::safe_get_thread_name(thread)));
946 JvmtiThreadState* state = thread->jvmti_thread_state();
947 if (state == NULL) {
948 return;
949 }
950 JvmtiEnvThreadStateIterator it(state);
951 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
952 if (ets->is_enabled(JVMTI_EVENT_CLASS_PREPARE)) {
953 EVT_TRACE(JVMTI_EVENT_CLASS_PREPARE, ("JVMTI [%s] Evt Class Prepare sent %s",
954 JvmtiTrace::safe_get_thread_name(thread),
955 kh()==NULL? "NULL" : kh()->external_name() ));
957 JvmtiEnv *env = ets->get_env();
958 JvmtiClassEventMark jem(thread, kh());
959 JvmtiJavaThreadEventTransition jet(thread);
960 jvmtiEventClassPrepare callback = env->callbacks()->ClassPrepare;
961 if (callback != NULL) {
962 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_class());
963 }
964 }
965 }
966 }
968 void JvmtiExport::post_class_unload(Klass* klass) {
969 Thread *thread = Thread::current();
970 HandleMark hm(thread);
971 KlassHandle kh(thread, klass);
973 EVT_TRIG_TRACE(EXT_EVENT_CLASS_UNLOAD, ("JVMTI [?] Trg Class Unload triggered" ));
974 if (JvmtiEventController::is_enabled((jvmtiEvent)EXT_EVENT_CLASS_UNLOAD)) {
975 assert(thread->is_VM_thread(), "wrong thread");
977 // get JavaThread for whom we are proxy
978 JavaThread *real_thread =
979 (JavaThread *)((VMThread *)thread)->vm_operation()->calling_thread();
981 JvmtiEnvIterator it;
982 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
983 if (env->is_enabled((jvmtiEvent)EXT_EVENT_CLASS_UNLOAD)) {
984 EVT_TRACE(EXT_EVENT_CLASS_UNLOAD, ("JVMTI [?] Evt Class Unload sent %s",
985 kh()==NULL? "NULL" : kh()->external_name() ));
987 // do everything manually, since this is a proxy - needs special care
988 JNIEnv* jni_env = real_thread->jni_environment();
989 jthread jt = (jthread)JNIHandles::make_local(real_thread, real_thread->threadObj());
990 jclass jk = (jclass)JNIHandles::make_local(real_thread, kh()->java_mirror());
992 // Before we call the JVMTI agent, we have to set the state in the
993 // thread for which we are proxying.
994 JavaThreadState prev_state = real_thread->thread_state();
995 assert(prev_state == _thread_blocked, "JavaThread should be at safepoint");
996 real_thread->set_thread_state(_thread_in_native);
998 jvmtiExtensionEvent callback = env->ext_callbacks()->ClassUnload;
999 if (callback != NULL) {
1000 (*callback)(env->jvmti_external(), jni_env, jt, jk);
1001 }
1003 assert(real_thread->thread_state() == _thread_in_native,
1004 "JavaThread should be in native");
1005 real_thread->set_thread_state(prev_state);
1007 JNIHandles::destroy_local(jk);
1008 JNIHandles::destroy_local(jt);
1009 }
1010 }
1011 }
1012 }
1015 void JvmtiExport::post_thread_start(JavaThread *thread) {
1016 assert(thread->thread_state() == _thread_in_vm, "must be in vm state");
1018 EVT_TRIG_TRACE(JVMTI_EVENT_THREAD_START, ("JVMTI [%s] Trg Thread Start event triggered",
1019 JvmtiTrace::safe_get_thread_name(thread)));
1021 // do JVMTI thread initialization (if needed)
1022 JvmtiEventController::thread_started(thread);
1024 // Do not post thread start event for hidden java thread.
1025 if (JvmtiEventController::is_enabled(JVMTI_EVENT_THREAD_START) &&
1026 !thread->is_hidden_from_external_view()) {
1027 JvmtiEnvIterator it;
1028 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1029 if (env->is_enabled(JVMTI_EVENT_THREAD_START)) {
1030 EVT_TRACE(JVMTI_EVENT_THREAD_START, ("JVMTI [%s] Evt Thread Start event sent",
1031 JvmtiTrace::safe_get_thread_name(thread) ));
1033 JvmtiThreadEventMark jem(thread);
1034 JvmtiJavaThreadEventTransition jet(thread);
1035 jvmtiEventThreadStart callback = env->callbacks()->ThreadStart;
1036 if (callback != NULL) {
1037 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread());
1038 }
1039 }
1040 }
1041 }
1042 }
1045 void JvmtiExport::post_thread_end(JavaThread *thread) {
1046 EVT_TRIG_TRACE(JVMTI_EVENT_THREAD_END, ("JVMTI [%s] Trg Thread End event triggered",
1047 JvmtiTrace::safe_get_thread_name(thread)));
1049 JvmtiThreadState *state = thread->jvmti_thread_state();
1050 if (state == NULL) {
1051 return;
1052 }
1054 // Do not post thread end event for hidden java thread.
1055 if (state->is_enabled(JVMTI_EVENT_THREAD_END) &&
1056 !thread->is_hidden_from_external_view()) {
1058 JvmtiEnvThreadStateIterator it(state);
1059 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1060 if (ets->is_enabled(JVMTI_EVENT_THREAD_END)) {
1061 EVT_TRACE(JVMTI_EVENT_THREAD_END, ("JVMTI [%s] Evt Thread End event sent",
1062 JvmtiTrace::safe_get_thread_name(thread) ));
1064 JvmtiEnv *env = ets->get_env();
1065 JvmtiThreadEventMark jem(thread);
1066 JvmtiJavaThreadEventTransition jet(thread);
1067 jvmtiEventThreadEnd callback = env->callbacks()->ThreadEnd;
1068 if (callback != NULL) {
1069 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread());
1070 }
1071 }
1072 }
1073 }
1074 }
1076 void JvmtiExport::post_object_free(JvmtiEnv* env, jlong tag) {
1077 assert(SafepointSynchronize::is_at_safepoint(), "must be executed at safepoint");
1078 assert(env->is_enabled(JVMTI_EVENT_OBJECT_FREE), "checking");
1080 EVT_TRIG_TRACE(JVMTI_EVENT_OBJECT_FREE, ("JVMTI [?] Trg Object Free triggered" ));
1081 EVT_TRACE(JVMTI_EVENT_OBJECT_FREE, ("JVMTI [?] Evt Object Free sent"));
1083 jvmtiEventObjectFree callback = env->callbacks()->ObjectFree;
1084 if (callback != NULL) {
1085 (*callback)(env->jvmti_external(), tag);
1086 }
1087 }
1089 void JvmtiExport::post_resource_exhausted(jint resource_exhausted_flags, const char* description) {
1090 EVT_TRIG_TRACE(JVMTI_EVENT_RESOURCE_EXHAUSTED, ("JVMTI Trg resource exhausted event triggered" ));
1092 JvmtiEnvIterator it;
1093 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1094 if (env->is_enabled(JVMTI_EVENT_RESOURCE_EXHAUSTED)) {
1095 EVT_TRACE(JVMTI_EVENT_RESOURCE_EXHAUSTED, ("JVMTI Evt resource exhausted event sent" ));
1097 JavaThread *thread = JavaThread::current();
1098 JvmtiThreadEventMark jem(thread);
1099 JvmtiJavaThreadEventTransition jet(thread);
1100 jvmtiEventResourceExhausted callback = env->callbacks()->ResourceExhausted;
1101 if (callback != NULL) {
1102 (*callback)(env->jvmti_external(), jem.jni_env(),
1103 resource_exhausted_flags, NULL, description);
1104 }
1105 }
1106 }
1107 }
1109 void JvmtiExport::post_method_entry(JavaThread *thread, Method* method, frame current_frame) {
1110 HandleMark hm(thread);
1111 methodHandle mh(thread, method);
1113 EVT_TRIG_TRACE(JVMTI_EVENT_METHOD_ENTRY, ("JVMTI [%s] Trg Method Entry triggered %s.%s",
1114 JvmtiTrace::safe_get_thread_name(thread),
1115 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1116 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1118 JvmtiThreadState* state = thread->jvmti_thread_state();
1119 if (state == NULL || !state->is_interp_only_mode()) {
1120 // for any thread that actually wants method entry, interp_only_mode is set
1121 return;
1122 }
1124 state->incr_cur_stack_depth();
1126 if (state->is_enabled(JVMTI_EVENT_METHOD_ENTRY)) {
1127 JvmtiEnvThreadStateIterator it(state);
1128 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1129 if (ets->is_enabled(JVMTI_EVENT_METHOD_ENTRY)) {
1130 EVT_TRACE(JVMTI_EVENT_METHOD_ENTRY, ("JVMTI [%s] Evt Method Entry sent %s.%s",
1131 JvmtiTrace::safe_get_thread_name(thread),
1132 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1133 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1135 JvmtiEnv *env = ets->get_env();
1136 JvmtiMethodEventMark jem(thread, mh);
1137 JvmtiJavaThreadEventTransition jet(thread);
1138 jvmtiEventMethodEntry callback = env->callbacks()->MethodEntry;
1139 if (callback != NULL) {
1140 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_methodID());
1141 }
1142 }
1143 }
1144 }
1145 }
1147 void JvmtiExport::post_method_exit(JavaThread *thread, Method* method, frame current_frame) {
1148 HandleMark hm(thread);
1149 methodHandle mh(thread, method);
1151 EVT_TRIG_TRACE(JVMTI_EVENT_METHOD_EXIT, ("JVMTI [%s] Trg Method Exit triggered %s.%s",
1152 JvmtiTrace::safe_get_thread_name(thread),
1153 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1154 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1156 JvmtiThreadState *state = thread->jvmti_thread_state();
1157 if (state == NULL || !state->is_interp_only_mode()) {
1158 // for any thread that actually wants method exit, interp_only_mode is set
1159 return;
1160 }
1162 // return a flag when a method terminates by throwing an exception
1163 // i.e. if an exception is thrown and it's not caught by the current method
1164 bool exception_exit = state->is_exception_detected() && !state->is_exception_caught();
1167 if (state->is_enabled(JVMTI_EVENT_METHOD_EXIT)) {
1168 Handle result;
1169 jvalue value;
1170 value.j = 0L;
1172 // if the method hasn't been popped because of an exception then we populate
1173 // the return_value parameter for the callback. At this point we only have
1174 // the address of a "raw result" and we just call into the interpreter to
1175 // convert this into a jvalue.
1176 if (!exception_exit) {
1177 oop oop_result;
1178 BasicType type = current_frame.interpreter_frame_result(&oop_result, &value);
1179 if (type == T_OBJECT || type == T_ARRAY) {
1180 result = Handle(thread, oop_result);
1181 }
1182 }
1184 JvmtiEnvThreadStateIterator it(state);
1185 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1186 if (ets->is_enabled(JVMTI_EVENT_METHOD_EXIT)) {
1187 EVT_TRACE(JVMTI_EVENT_METHOD_EXIT, ("JVMTI [%s] Evt Method Exit sent %s.%s",
1188 JvmtiTrace::safe_get_thread_name(thread),
1189 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1190 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1192 JvmtiEnv *env = ets->get_env();
1193 JvmtiMethodEventMark jem(thread, mh);
1194 if (result.not_null()) {
1195 value.l = JNIHandles::make_local(thread, result());
1196 }
1197 JvmtiJavaThreadEventTransition jet(thread);
1198 jvmtiEventMethodExit callback = env->callbacks()->MethodExit;
1199 if (callback != NULL) {
1200 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1201 jem.jni_methodID(), exception_exit, value);
1202 }
1203 }
1204 }
1205 }
1207 if (state->is_enabled(JVMTI_EVENT_FRAME_POP)) {
1208 JvmtiEnvThreadStateIterator it(state);
1209 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1210 int cur_frame_number = state->cur_stack_depth();
1212 if (ets->is_frame_pop(cur_frame_number)) {
1213 // we have a NotifyFramePop entry for this frame.
1214 // now check that this env/thread wants this event
1215 if (ets->is_enabled(JVMTI_EVENT_FRAME_POP)) {
1216 EVT_TRACE(JVMTI_EVENT_FRAME_POP, ("JVMTI [%s] Evt Frame Pop sent %s.%s",
1217 JvmtiTrace::safe_get_thread_name(thread),
1218 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1219 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1221 // we also need to issue a frame pop event for this frame
1222 JvmtiEnv *env = ets->get_env();
1223 JvmtiMethodEventMark jem(thread, mh);
1224 JvmtiJavaThreadEventTransition jet(thread);
1225 jvmtiEventFramePop callback = env->callbacks()->FramePop;
1226 if (callback != NULL) {
1227 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1228 jem.jni_methodID(), exception_exit);
1229 }
1230 }
1231 // remove the frame's entry
1232 ets->clear_frame_pop(cur_frame_number);
1233 }
1234 }
1235 }
1237 state->decr_cur_stack_depth();
1238 }
1241 // Todo: inline this for optimization
1242 void JvmtiExport::post_single_step(JavaThread *thread, Method* method, address location) {
1243 HandleMark hm(thread);
1244 methodHandle mh(thread, method);
1246 JvmtiThreadState *state = thread->jvmti_thread_state();
1247 if (state == NULL) {
1248 return;
1249 }
1250 JvmtiEnvThreadStateIterator it(state);
1251 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1252 ets->compare_and_set_current_location(mh(), location, JVMTI_EVENT_SINGLE_STEP);
1253 if (!ets->single_stepping_posted() && ets->is_enabled(JVMTI_EVENT_SINGLE_STEP)) {
1254 EVT_TRACE(JVMTI_EVENT_SINGLE_STEP, ("JVMTI [%s] Evt Single Step sent %s.%s @ %d",
1255 JvmtiTrace::safe_get_thread_name(thread),
1256 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1257 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1258 location - mh()->code_base() ));
1260 JvmtiEnv *env = ets->get_env();
1261 JvmtiLocationEventMark jem(thread, mh, location);
1262 JvmtiJavaThreadEventTransition jet(thread);
1263 jvmtiEventSingleStep callback = env->callbacks()->SingleStep;
1264 if (callback != NULL) {
1265 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1266 jem.jni_methodID(), jem.location());
1267 }
1269 ets->set_single_stepping_posted();
1270 }
1271 }
1272 }
1275 void JvmtiExport::post_exception_throw(JavaThread *thread, Method* method, address location, oop exception) {
1276 HandleMark hm(thread);
1277 methodHandle mh(thread, method);
1278 Handle exception_handle(thread, exception);
1280 JvmtiThreadState *state = thread->jvmti_thread_state();
1281 if (state == NULL) {
1282 return;
1283 }
1285 EVT_TRIG_TRACE(JVMTI_EVENT_EXCEPTION, ("JVMTI [%s] Trg Exception thrown triggered",
1286 JvmtiTrace::safe_get_thread_name(thread)));
1287 if (!state->is_exception_detected()) {
1288 state->set_exception_detected();
1289 JvmtiEnvThreadStateIterator it(state);
1290 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1291 if (ets->is_enabled(JVMTI_EVENT_EXCEPTION) && (exception != NULL)) {
1293 EVT_TRACE(JVMTI_EVENT_EXCEPTION,
1294 ("JVMTI [%s] Evt Exception thrown sent %s.%s @ %d",
1295 JvmtiTrace::safe_get_thread_name(thread),
1296 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1297 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1298 location - mh()->code_base() ));
1300 JvmtiEnv *env = ets->get_env();
1301 JvmtiExceptionEventMark jem(thread, mh, location, exception_handle);
1303 // It's okay to clear these exceptions here because we duplicate
1304 // this lookup in InterpreterRuntime::exception_handler_for_exception.
1305 EXCEPTION_MARK;
1307 bool should_repeat;
1308 vframeStream st(thread);
1309 assert(!st.at_end(), "cannot be at end");
1310 Method* current_method = NULL;
1311 // A GC may occur during the Method::fast_exception_handler_bci_for()
1312 // call below if it needs to load the constraint class. Using a
1313 // methodHandle to keep the 'current_method' from being deallocated
1314 // if GC happens.
1315 methodHandle current_mh = methodHandle(thread, current_method);
1316 int current_bci = -1;
1317 do {
1318 current_method = st.method();
1319 current_mh = methodHandle(thread, current_method);
1320 current_bci = st.bci();
1321 do {
1322 should_repeat = false;
1323 KlassHandle eh_klass(thread, exception_handle()->klass());
1324 current_bci = Method::fast_exception_handler_bci_for(
1325 current_mh, eh_klass, current_bci, THREAD);
1326 if (HAS_PENDING_EXCEPTION) {
1327 exception_handle = Handle(thread, PENDING_EXCEPTION);
1328 CLEAR_PENDING_EXCEPTION;
1329 should_repeat = true;
1330 }
1331 } while (should_repeat && (current_bci != -1));
1332 st.next();
1333 } while ((current_bci < 0) && (!st.at_end()));
1335 jmethodID catch_jmethodID;
1336 if (current_bci < 0) {
1337 catch_jmethodID = 0;
1338 current_bci = 0;
1339 } else {
1340 catch_jmethodID = jem.to_jmethodID(current_mh);
1341 }
1343 JvmtiJavaThreadEventTransition jet(thread);
1344 jvmtiEventException callback = env->callbacks()->Exception;
1345 if (callback != NULL) {
1346 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1347 jem.jni_methodID(), jem.location(),
1348 jem.exception(),
1349 catch_jmethodID, current_bci);
1350 }
1351 }
1352 }
1353 }
1355 // frames may get popped because of this throw, be safe - invalidate cached depth
1356 state->invalidate_cur_stack_depth();
1357 }
1360 void JvmtiExport::notice_unwind_due_to_exception(JavaThread *thread, Method* method, address location, oop exception, bool in_handler_frame) {
1361 HandleMark hm(thread);
1362 methodHandle mh(thread, method);
1363 Handle exception_handle(thread, exception);
1365 JvmtiThreadState *state = thread->jvmti_thread_state();
1366 if (state == NULL) {
1367 return;
1368 }
1369 EVT_TRIG_TRACE(JVMTI_EVENT_EXCEPTION_CATCH,
1370 ("JVMTI [%s] Trg unwind_due_to_exception triggered %s.%s @ %s%d - %s",
1371 JvmtiTrace::safe_get_thread_name(thread),
1372 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1373 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1374 location==0? "no location:" : "",
1375 location==0? 0 : location - mh()->code_base(),
1376 in_handler_frame? "in handler frame" : "not handler frame" ));
1378 if (state->is_exception_detected()) {
1380 state->invalidate_cur_stack_depth();
1381 if (!in_handler_frame) {
1382 // Not in exception handler.
1383 if(state->is_interp_only_mode()) {
1384 // method exit and frame pop events are posted only in interp mode.
1385 // When these events are enabled code should be in running in interp mode.
1386 JvmtiExport::post_method_exit(thread, method, thread->last_frame());
1387 // The cached cur_stack_depth might have changed from the
1388 // operations of frame pop or method exit. We are not 100% sure
1389 // the cached cur_stack_depth is still valid depth so invalidate
1390 // it.
1391 state->invalidate_cur_stack_depth();
1392 }
1393 } else {
1394 // In exception handler frame. Report exception catch.
1395 assert(location != NULL, "must be a known location");
1396 // Update cur_stack_depth - the frames above the current frame
1397 // have been unwound due to this exception:
1398 assert(!state->is_exception_caught(), "exception must not be caught yet.");
1399 state->set_exception_caught();
1401 JvmtiEnvThreadStateIterator it(state);
1402 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1403 if (ets->is_enabled(JVMTI_EVENT_EXCEPTION_CATCH) && (exception_handle() != NULL)) {
1404 EVT_TRACE(JVMTI_EVENT_EXCEPTION_CATCH,
1405 ("JVMTI [%s] Evt ExceptionCatch sent %s.%s @ %d",
1406 JvmtiTrace::safe_get_thread_name(thread),
1407 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1408 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1409 location - mh()->code_base() ));
1411 JvmtiEnv *env = ets->get_env();
1412 JvmtiExceptionEventMark jem(thread, mh, location, exception_handle);
1413 JvmtiJavaThreadEventTransition jet(thread);
1414 jvmtiEventExceptionCatch callback = env->callbacks()->ExceptionCatch;
1415 if (callback != NULL) {
1416 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1417 jem.jni_methodID(), jem.location(),
1418 jem.exception());
1419 }
1420 }
1421 }
1422 }
1423 }
1424 }
1426 oop JvmtiExport::jni_GetField_probe(JavaThread *thread, jobject jobj, oop obj,
1427 Klass* klass, jfieldID fieldID, bool is_static) {
1428 if (*((int *)get_field_access_count_addr()) > 0 && thread->has_last_Java_frame()) {
1429 // At least one field access watch is set so we have more work
1430 // to do. This wrapper is used by entry points that allow us
1431 // to create handles in post_field_access_by_jni().
1432 post_field_access_by_jni(thread, obj, klass, fieldID, is_static);
1433 // event posting can block so refetch oop if we were passed a jobj
1434 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj);
1435 }
1436 return obj;
1437 }
1439 oop JvmtiExport::jni_GetField_probe_nh(JavaThread *thread, jobject jobj, oop obj,
1440 Klass* klass, jfieldID fieldID, bool is_static) {
1441 if (*((int *)get_field_access_count_addr()) > 0 && thread->has_last_Java_frame()) {
1442 // At least one field access watch is set so we have more work
1443 // to do. This wrapper is used by "quick" entry points that don't
1444 // allow us to create handles in post_field_access_by_jni(). We
1445 // override that with a ResetNoHandleMark.
1446 ResetNoHandleMark rnhm;
1447 post_field_access_by_jni(thread, obj, klass, fieldID, is_static);
1448 // event posting can block so refetch oop if we were passed a jobj
1449 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj);
1450 }
1451 return obj;
1452 }
1454 void JvmtiExport::post_field_access_by_jni(JavaThread *thread, oop obj,
1455 Klass* klass, jfieldID fieldID, bool is_static) {
1456 // We must be called with a Java context in order to provide reasonable
1457 // values for the klazz, method, and location fields. The callers of this
1458 // function don't make the call unless there is a Java context.
1459 assert(thread->has_last_Java_frame(), "must be called with a Java context");
1461 ResourceMark rm;
1462 fieldDescriptor fd;
1463 // if get_field_descriptor finds fieldID to be invalid, then we just bail
1464 bool valid_fieldID = JvmtiEnv::get_field_descriptor(klass, fieldID, &fd);
1465 assert(valid_fieldID == true,"post_field_access_by_jni called with invalid fieldID");
1466 if (!valid_fieldID) return;
1467 // field accesses are not watched so bail
1468 if (!fd.is_field_access_watched()) return;
1470 HandleMark hm(thread);
1471 KlassHandle h_klass(thread, klass);
1472 Handle h_obj;
1473 if (!is_static) {
1474 // non-static field accessors have an object, but we need a handle
1475 assert(obj != NULL, "non-static needs an object");
1476 h_obj = Handle(thread, obj);
1477 }
1478 post_field_access(thread,
1479 thread->last_frame().interpreter_frame_method(),
1480 thread->last_frame().interpreter_frame_bcp(),
1481 h_klass, h_obj, fieldID);
1482 }
1484 void JvmtiExport::post_field_access(JavaThread *thread, Method* method,
1485 address location, KlassHandle field_klass, Handle object, jfieldID field) {
1487 HandleMark hm(thread);
1488 methodHandle mh(thread, method);
1490 JvmtiThreadState *state = thread->jvmti_thread_state();
1491 if (state == NULL) {
1492 return;
1493 }
1494 EVT_TRIG_TRACE(JVMTI_EVENT_FIELD_ACCESS, ("JVMTI [%s] Trg Field Access event triggered",
1495 JvmtiTrace::safe_get_thread_name(thread)));
1496 JvmtiEnvThreadStateIterator it(state);
1497 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1498 if (ets->is_enabled(JVMTI_EVENT_FIELD_ACCESS)) {
1499 EVT_TRACE(JVMTI_EVENT_FIELD_ACCESS, ("JVMTI [%s] Evt Field Access event sent %s.%s @ %d",
1500 JvmtiTrace::safe_get_thread_name(thread),
1501 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1502 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1503 location - mh()->code_base() ));
1505 JvmtiEnv *env = ets->get_env();
1506 JvmtiLocationEventMark jem(thread, mh, location);
1507 jclass field_jclass = jem.to_jclass(field_klass());
1508 jobject field_jobject = jem.to_jobject(object());
1509 JvmtiJavaThreadEventTransition jet(thread);
1510 jvmtiEventFieldAccess callback = env->callbacks()->FieldAccess;
1511 if (callback != NULL) {
1512 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1513 jem.jni_methodID(), jem.location(),
1514 field_jclass, field_jobject, field);
1515 }
1516 }
1517 }
1518 }
1520 oop JvmtiExport::jni_SetField_probe(JavaThread *thread, jobject jobj, oop obj,
1521 Klass* klass, jfieldID fieldID, bool is_static,
1522 char sig_type, jvalue *value) {
1523 if (*((int *)get_field_modification_count_addr()) > 0 && thread->has_last_Java_frame()) {
1524 // At least one field modification watch is set so we have more work
1525 // to do. This wrapper is used by entry points that allow us
1526 // to create handles in post_field_modification_by_jni().
1527 post_field_modification_by_jni(thread, obj, klass, fieldID, is_static, sig_type, value);
1528 // event posting can block so refetch oop if we were passed a jobj
1529 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj);
1530 }
1531 return obj;
1532 }
1534 oop JvmtiExport::jni_SetField_probe_nh(JavaThread *thread, jobject jobj, oop obj,
1535 Klass* klass, jfieldID fieldID, bool is_static,
1536 char sig_type, jvalue *value) {
1537 if (*((int *)get_field_modification_count_addr()) > 0 && thread->has_last_Java_frame()) {
1538 // At least one field modification watch is set so we have more work
1539 // to do. This wrapper is used by "quick" entry points that don't
1540 // allow us to create handles in post_field_modification_by_jni(). We
1541 // override that with a ResetNoHandleMark.
1542 ResetNoHandleMark rnhm;
1543 post_field_modification_by_jni(thread, obj, klass, fieldID, is_static, sig_type, value);
1544 // event posting can block so refetch oop if we were passed a jobj
1545 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj);
1546 }
1547 return obj;
1548 }
1550 void JvmtiExport::post_field_modification_by_jni(JavaThread *thread, oop obj,
1551 Klass* klass, jfieldID fieldID, bool is_static,
1552 char sig_type, jvalue *value) {
1553 // We must be called with a Java context in order to provide reasonable
1554 // values for the klazz, method, and location fields. The callers of this
1555 // function don't make the call unless there is a Java context.
1556 assert(thread->has_last_Java_frame(), "must be called with Java context");
1558 ResourceMark rm;
1559 fieldDescriptor fd;
1560 // if get_field_descriptor finds fieldID to be invalid, then we just bail
1561 bool valid_fieldID = JvmtiEnv::get_field_descriptor(klass, fieldID, &fd);
1562 assert(valid_fieldID == true,"post_field_modification_by_jni called with invalid fieldID");
1563 if (!valid_fieldID) return;
1564 // field modifications are not watched so bail
1565 if (!fd.is_field_modification_watched()) return;
1567 HandleMark hm(thread);
1569 Handle h_obj;
1570 if (!is_static) {
1571 // non-static field accessors have an object, but we need a handle
1572 assert(obj != NULL, "non-static needs an object");
1573 h_obj = Handle(thread, obj);
1574 }
1575 KlassHandle h_klass(thread, klass);
1576 post_field_modification(thread,
1577 thread->last_frame().interpreter_frame_method(),
1578 thread->last_frame().interpreter_frame_bcp(),
1579 h_klass, h_obj, fieldID, sig_type, value);
1580 }
1582 void JvmtiExport::post_raw_field_modification(JavaThread *thread, Method* method,
1583 address location, KlassHandle field_klass, Handle object, jfieldID field,
1584 char sig_type, jvalue *value) {
1586 if (sig_type == 'I' || sig_type == 'Z' || sig_type == 'C' || sig_type == 'S') {
1587 // 'I' instructions are used for byte, char, short and int.
1588 // determine which it really is, and convert
1589 fieldDescriptor fd;
1590 bool found = JvmtiEnv::get_field_descriptor(field_klass(), field, &fd);
1591 // should be found (if not, leave as is)
1592 if (found) {
1593 jint ival = value->i;
1594 // convert value from int to appropriate type
1595 switch (fd.field_type()) {
1596 case T_BOOLEAN:
1597 sig_type = 'Z';
1598 value->i = 0; // clear it
1599 value->z = (jboolean)ival;
1600 break;
1601 case T_BYTE:
1602 sig_type = 'B';
1603 value->i = 0; // clear it
1604 value->b = (jbyte)ival;
1605 break;
1606 case T_CHAR:
1607 sig_type = 'C';
1608 value->i = 0; // clear it
1609 value->c = (jchar)ival;
1610 break;
1611 case T_SHORT:
1612 sig_type = 'S';
1613 value->i = 0; // clear it
1614 value->s = (jshort)ival;
1615 break;
1616 case T_INT:
1617 // nothing to do
1618 break;
1619 default:
1620 // this is an integer instruction, should be one of above
1621 ShouldNotReachHere();
1622 break;
1623 }
1624 }
1625 }
1627 assert(sig_type != '[', "array should have sig_type == 'L'");
1628 bool handle_created = false;
1630 // convert oop to JNI handle.
1631 if (sig_type == 'L') {
1632 handle_created = true;
1633 value->l = (jobject)JNIHandles::make_local(thread, (oop)value->l);
1634 }
1636 post_field_modification(thread, method, location, field_klass, object, field, sig_type, value);
1638 // Destroy the JNI handle allocated above.
1639 if (handle_created) {
1640 JNIHandles::destroy_local(value->l);
1641 }
1642 }
1644 void JvmtiExport::post_field_modification(JavaThread *thread, Method* method,
1645 address location, KlassHandle field_klass, Handle object, jfieldID field,
1646 char sig_type, jvalue *value_ptr) {
1648 HandleMark hm(thread);
1649 methodHandle mh(thread, method);
1651 JvmtiThreadState *state = thread->jvmti_thread_state();
1652 if (state == NULL) {
1653 return;
1654 }
1655 EVT_TRIG_TRACE(JVMTI_EVENT_FIELD_MODIFICATION,
1656 ("JVMTI [%s] Trg Field Modification event triggered",
1657 JvmtiTrace::safe_get_thread_name(thread)));
1659 JvmtiEnvThreadStateIterator it(state);
1660 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1661 if (ets->is_enabled(JVMTI_EVENT_FIELD_MODIFICATION)) {
1662 EVT_TRACE(JVMTI_EVENT_FIELD_MODIFICATION,
1663 ("JVMTI [%s] Evt Field Modification event sent %s.%s @ %d",
1664 JvmtiTrace::safe_get_thread_name(thread),
1665 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1666 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1667 location - mh()->code_base() ));
1669 JvmtiEnv *env = ets->get_env();
1670 JvmtiLocationEventMark jem(thread, mh, location);
1671 jclass field_jclass = jem.to_jclass(field_klass());
1672 jobject field_jobject = jem.to_jobject(object());
1673 JvmtiJavaThreadEventTransition jet(thread);
1674 jvmtiEventFieldModification callback = env->callbacks()->FieldModification;
1675 if (callback != NULL) {
1676 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1677 jem.jni_methodID(), jem.location(),
1678 field_jclass, field_jobject, field, sig_type, *value_ptr);
1679 }
1680 }
1681 }
1682 }
1684 void JvmtiExport::post_native_method_bind(Method* method, address* function_ptr) {
1685 JavaThread* thread = JavaThread::current();
1686 assert(thread->thread_state() == _thread_in_vm, "must be in vm state");
1688 HandleMark hm(thread);
1689 methodHandle mh(thread, method);
1691 EVT_TRIG_TRACE(JVMTI_EVENT_NATIVE_METHOD_BIND, ("JVMTI [%s] Trg Native Method Bind event triggered",
1692 JvmtiTrace::safe_get_thread_name(thread)));
1694 if (JvmtiEventController::is_enabled(JVMTI_EVENT_NATIVE_METHOD_BIND)) {
1695 JvmtiEnvIterator it;
1696 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1697 if (env->is_enabled(JVMTI_EVENT_NATIVE_METHOD_BIND)) {
1698 EVT_TRACE(JVMTI_EVENT_NATIVE_METHOD_BIND, ("JVMTI [%s] Evt Native Method Bind event sent",
1699 JvmtiTrace::safe_get_thread_name(thread) ));
1701 JvmtiMethodEventMark jem(thread, mh);
1702 JvmtiJavaThreadEventTransition jet(thread);
1703 JNIEnv* jni_env = JvmtiEnv::get_phase() == JVMTI_PHASE_PRIMORDIAL? NULL : jem.jni_env();
1704 jvmtiEventNativeMethodBind callback = env->callbacks()->NativeMethodBind;
1705 if (callback != NULL) {
1706 (*callback)(env->jvmti_external(), jni_env, jem.jni_thread(),
1707 jem.jni_methodID(), (void*)(*function_ptr), (void**)function_ptr);
1708 }
1709 }
1710 }
1711 }
1712 }
1714 // Returns a record containing inlining information for the given nmethod
1715 jvmtiCompiledMethodLoadInlineRecord* create_inline_record(nmethod* nm) {
1716 jint numstackframes = 0;
1717 jvmtiCompiledMethodLoadInlineRecord* record = (jvmtiCompiledMethodLoadInlineRecord*)NEW_RESOURCE_OBJ(jvmtiCompiledMethodLoadInlineRecord);
1718 record->header.kind = JVMTI_CMLR_INLINE_INFO;
1719 record->header.next = NULL;
1720 record->header.majorinfoversion = JVMTI_CMLR_MAJOR_VERSION_1;
1721 record->header.minorinfoversion = JVMTI_CMLR_MINOR_VERSION_0;
1722 record->numpcs = 0;
1723 for(PcDesc* p = nm->scopes_pcs_begin(); p < nm->scopes_pcs_end(); p++) {
1724 if(p->scope_decode_offset() == DebugInformationRecorder::serialized_null) continue;
1725 record->numpcs++;
1726 }
1727 record->pcinfo = (PCStackInfo*)(NEW_RESOURCE_ARRAY(PCStackInfo, record->numpcs));
1728 int scope = 0;
1729 for(PcDesc* p = nm->scopes_pcs_begin(); p < nm->scopes_pcs_end(); p++) {
1730 if(p->scope_decode_offset() == DebugInformationRecorder::serialized_null) continue;
1731 void* pc_address = (void*)p->real_pc(nm);
1732 assert(pc_address != NULL, "pc_address must be non-null");
1733 record->pcinfo[scope].pc = pc_address;
1734 numstackframes=0;
1735 for(ScopeDesc* sd = nm->scope_desc_at(p->real_pc(nm));sd != NULL;sd = sd->sender()) {
1736 numstackframes++;
1737 }
1738 assert(numstackframes != 0, "numstackframes must be nonzero.");
1739 record->pcinfo[scope].methods = (jmethodID *)NEW_RESOURCE_ARRAY(jmethodID, numstackframes);
1740 record->pcinfo[scope].bcis = (jint *)NEW_RESOURCE_ARRAY(jint, numstackframes);
1741 record->pcinfo[scope].numstackframes = numstackframes;
1742 int stackframe = 0;
1743 for(ScopeDesc* sd = nm->scope_desc_at(p->real_pc(nm));sd != NULL;sd = sd->sender()) {
1744 // sd->method() can be NULL for stubs but not for nmethods. To be completely robust, include an assert that we should never see a null sd->method()
1745 assert(sd->method() != NULL, "sd->method() cannot be null.");
1746 record->pcinfo[scope].methods[stackframe] = sd->method()->jmethod_id();
1747 record->pcinfo[scope].bcis[stackframe] = sd->bci();
1748 stackframe++;
1749 }
1750 scope++;
1751 }
1752 return record;
1753 }
1755 void JvmtiExport::post_compiled_method_load(nmethod *nm) {
1756 JavaThread* thread = JavaThread::current();
1758 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
1759 ("JVMTI [%s] method compile load event triggered",
1760 JvmtiTrace::safe_get_thread_name(thread)));
1762 JvmtiEnvIterator it;
1763 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1764 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_LOAD)) {
1766 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
1767 ("JVMTI [%s] class compile method load event sent %s.%s ",
1768 JvmtiTrace::safe_get_thread_name(thread),
1769 (nm->method() == NULL) ? "NULL" : nm->method()->klass_name()->as_C_string(),
1770 (nm->method() == NULL) ? "NULL" : nm->method()->name()->as_C_string()));
1771 ResourceMark rm(thread);
1772 HandleMark hm(thread);
1774 // Add inlining information
1775 jvmtiCompiledMethodLoadInlineRecord* inlinerecord = create_inline_record(nm);
1776 // Pass inlining information through the void pointer
1777 JvmtiCompiledMethodLoadEventMark jem(thread, nm, inlinerecord);
1778 JvmtiJavaThreadEventTransition jet(thread);
1779 jvmtiEventCompiledMethodLoad callback = env->callbacks()->CompiledMethodLoad;
1780 if (callback != NULL) {
1781 (*callback)(env->jvmti_external(), jem.jni_methodID(),
1782 jem.code_size(), jem.code_data(), jem.map_length(),
1783 jem.map(), jem.compile_info());
1784 }
1785 }
1786 }
1787 }
1790 // post a COMPILED_METHOD_LOAD event for a given environment
1791 void JvmtiExport::post_compiled_method_load(JvmtiEnv* env, const jmethodID method, const jint length,
1792 const void *code_begin, const jint map_length,
1793 const jvmtiAddrLocationMap* map)
1794 {
1795 JavaThread* thread = JavaThread::current();
1796 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
1797 ("JVMTI [%s] method compile load event triggered (by GenerateEvents)",
1798 JvmtiTrace::safe_get_thread_name(thread)));
1799 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_LOAD)) {
1801 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
1802 ("JVMTI [%s] class compile method load event sent (by GenerateEvents), jmethodID=" PTR_FORMAT,
1803 JvmtiTrace::safe_get_thread_name(thread), method));
1805 JvmtiEventMark jem(thread);
1806 JvmtiJavaThreadEventTransition jet(thread);
1807 jvmtiEventCompiledMethodLoad callback = env->callbacks()->CompiledMethodLoad;
1808 if (callback != NULL) {
1809 (*callback)(env->jvmti_external(), method,
1810 length, code_begin, map_length,
1811 map, NULL);
1812 }
1813 }
1814 }
1816 void JvmtiExport::post_dynamic_code_generated_internal(const char *name, const void *code_begin, const void *code_end) {
1817 assert(name != NULL && name[0] != '\0', "sanity check");
1819 JavaThread* thread = JavaThread::current();
1820 // In theory everyone coming thru here is in_vm but we need to be certain
1821 // because a callee will do a vm->native transition
1822 ThreadInVMfromUnknown __tiv;
1824 EVT_TRIG_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED,
1825 ("JVMTI [%s] method dynamic code generated event triggered",
1826 JvmtiTrace::safe_get_thread_name(thread)));
1827 JvmtiEnvIterator it;
1828 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1829 if (env->is_enabled(JVMTI_EVENT_DYNAMIC_CODE_GENERATED)) {
1830 EVT_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED,
1831 ("JVMTI [%s] dynamic code generated event sent for %s",
1832 JvmtiTrace::safe_get_thread_name(thread), name));
1833 JvmtiEventMark jem(thread);
1834 JvmtiJavaThreadEventTransition jet(thread);
1835 jint length = (jint)pointer_delta(code_end, code_begin, sizeof(char));
1836 jvmtiEventDynamicCodeGenerated callback = env->callbacks()->DynamicCodeGenerated;
1837 if (callback != NULL) {
1838 (*callback)(env->jvmti_external(), name, (void*)code_begin, length);
1839 }
1840 }
1841 }
1842 }
1844 void JvmtiExport::post_dynamic_code_generated(const char *name, const void *code_begin, const void *code_end) {
1845 jvmtiPhase phase = JvmtiEnv::get_phase();
1846 if (phase == JVMTI_PHASE_PRIMORDIAL || phase == JVMTI_PHASE_START) {
1847 post_dynamic_code_generated_internal(name, code_begin, code_end);
1848 } else {
1849 // It may not be safe to post the event from this thread. Defer all
1850 // postings to the service thread so that it can perform them in a safe
1851 // context and in-order.
1852 MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag);
1853 JvmtiDeferredEvent event = JvmtiDeferredEvent::dynamic_code_generated_event(
1854 name, code_begin, code_end);
1855 JvmtiDeferredEventQueue::enqueue(event);
1856 }
1857 }
1860 // post a DYNAMIC_CODE_GENERATED event for a given environment
1861 // used by GenerateEvents
1862 void JvmtiExport::post_dynamic_code_generated(JvmtiEnv* env, const char *name,
1863 const void *code_begin, const void *code_end)
1864 {
1865 JavaThread* thread = JavaThread::current();
1866 EVT_TRIG_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED,
1867 ("JVMTI [%s] dynamic code generated event triggered (by GenerateEvents)",
1868 JvmtiTrace::safe_get_thread_name(thread)));
1869 if (env->is_enabled(JVMTI_EVENT_DYNAMIC_CODE_GENERATED)) {
1870 EVT_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED,
1871 ("JVMTI [%s] dynamic code generated event sent for %s",
1872 JvmtiTrace::safe_get_thread_name(thread), name));
1873 JvmtiEventMark jem(thread);
1874 JvmtiJavaThreadEventTransition jet(thread);
1875 jint length = (jint)pointer_delta(code_end, code_begin, sizeof(char));
1876 jvmtiEventDynamicCodeGenerated callback = env->callbacks()->DynamicCodeGenerated;
1877 if (callback != NULL) {
1878 (*callback)(env->jvmti_external(), name, (void*)code_begin, length);
1879 }
1880 }
1881 }
1883 // post a DynamicCodeGenerated event while holding locks in the VM.
1884 void JvmtiExport::post_dynamic_code_generated_while_holding_locks(const char* name,
1885 address code_begin, address code_end)
1886 {
1887 // register the stub with the current dynamic code event collector
1888 JvmtiThreadState* state = JvmtiThreadState::state_for(JavaThread::current());
1889 // state can only be NULL if the current thread is exiting which
1890 // should not happen since we're trying to post an event
1891 guarantee(state != NULL, "attempt to register stub via an exiting thread");
1892 JvmtiDynamicCodeEventCollector* collector = state->get_dynamic_code_event_collector();
1893 guarantee(collector != NULL, "attempt to register stub without event collector");
1894 collector->register_stub(name, code_begin, code_end);
1895 }
1897 // Collect all the vm internally allocated objects which are visible to java world
1898 void JvmtiExport::record_vm_internal_object_allocation(oop obj) {
1899 Thread* thread = ThreadLocalStorage::thread();
1900 if (thread != NULL && thread->is_Java_thread()) {
1901 // Can not take safepoint here.
1902 No_Safepoint_Verifier no_sfpt;
1903 // Can not take safepoint here so can not use state_for to get
1904 // jvmti thread state.
1905 JvmtiThreadState *state = ((JavaThread*)thread)->jvmti_thread_state();
1906 if (state != NULL ) {
1907 // state is non NULL when VMObjectAllocEventCollector is enabled.
1908 JvmtiVMObjectAllocEventCollector *collector;
1909 collector = state->get_vm_object_alloc_event_collector();
1910 if (collector != NULL && collector->is_enabled()) {
1911 // Don't record classes as these will be notified via the ClassLoad
1912 // event.
1913 if (obj->klass() != SystemDictionary::Class_klass()) {
1914 collector->record_allocation(obj);
1915 }
1916 }
1917 }
1918 }
1919 }
1921 void JvmtiExport::post_garbage_collection_finish() {
1922 Thread *thread = Thread::current(); // this event is posted from VM-Thread.
1923 EVT_TRIG_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH,
1924 ("JVMTI [%s] garbage collection finish event triggered",
1925 JvmtiTrace::safe_get_thread_name(thread)));
1926 JvmtiEnvIterator it;
1927 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1928 if (env->is_enabled(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH)) {
1929 EVT_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH,
1930 ("JVMTI [%s] garbage collection finish event sent ",
1931 JvmtiTrace::safe_get_thread_name(thread)));
1932 JvmtiThreadEventTransition jet(thread);
1933 // JNIEnv is NULL here because this event is posted from VM Thread
1934 jvmtiEventGarbageCollectionFinish callback = env->callbacks()->GarbageCollectionFinish;
1935 if (callback != NULL) {
1936 (*callback)(env->jvmti_external());
1937 }
1938 }
1939 }
1940 }
1942 void JvmtiExport::post_garbage_collection_start() {
1943 Thread* thread = Thread::current(); // this event is posted from vm-thread.
1944 EVT_TRIG_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_START,
1945 ("JVMTI [%s] garbage collection start event triggered",
1946 JvmtiTrace::safe_get_thread_name(thread)));
1947 JvmtiEnvIterator it;
1948 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1949 if (env->is_enabled(JVMTI_EVENT_GARBAGE_COLLECTION_START)) {
1950 EVT_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_START,
1951 ("JVMTI [%s] garbage collection start event sent ",
1952 JvmtiTrace::safe_get_thread_name(thread)));
1953 JvmtiThreadEventTransition jet(thread);
1954 // JNIEnv is NULL here because this event is posted from VM Thread
1955 jvmtiEventGarbageCollectionStart callback = env->callbacks()->GarbageCollectionStart;
1956 if (callback != NULL) {
1957 (*callback)(env->jvmti_external());
1958 }
1959 }
1960 }
1961 }
1963 void JvmtiExport::post_data_dump() {
1964 Thread *thread = Thread::current();
1965 EVT_TRIG_TRACE(JVMTI_EVENT_DATA_DUMP_REQUEST,
1966 ("JVMTI [%s] data dump request event triggered",
1967 JvmtiTrace::safe_get_thread_name(thread)));
1968 JvmtiEnvIterator it;
1969 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1970 if (env->is_enabled(JVMTI_EVENT_DATA_DUMP_REQUEST)) {
1971 EVT_TRACE(JVMTI_EVENT_DATA_DUMP_REQUEST,
1972 ("JVMTI [%s] data dump request event sent ",
1973 JvmtiTrace::safe_get_thread_name(thread)));
1974 JvmtiThreadEventTransition jet(thread);
1975 // JNIEnv is NULL here because this event is posted from VM Thread
1976 jvmtiEventDataDumpRequest callback = env->callbacks()->DataDumpRequest;
1977 if (callback != NULL) {
1978 (*callback)(env->jvmti_external());
1979 }
1980 }
1981 }
1982 }
1984 void JvmtiExport::post_monitor_contended_enter(JavaThread *thread, ObjectMonitor *obj_mntr) {
1985 oop object = (oop)obj_mntr->object();
1986 if (!ServiceUtil::visible_oop(object)) {
1987 // Ignore monitor contended enter for vm internal object.
1988 return;
1989 }
1990 JvmtiThreadState *state = thread->jvmti_thread_state();
1991 if (state == NULL) {
1992 return;
1993 }
1995 HandleMark hm(thread);
1996 Handle h(thread, object);
1998 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTER,
1999 ("JVMTI [%s] montior contended enter event triggered",
2000 JvmtiTrace::safe_get_thread_name(thread)));
2002 JvmtiEnvThreadStateIterator it(state);
2003 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
2004 if (ets->is_enabled(JVMTI_EVENT_MONITOR_CONTENDED_ENTER)) {
2005 EVT_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTER,
2006 ("JVMTI [%s] monitor contended enter event sent",
2007 JvmtiTrace::safe_get_thread_name(thread)));
2008 JvmtiMonitorEventMark jem(thread, h());
2009 JvmtiEnv *env = ets->get_env();
2010 JvmtiThreadEventTransition jet(thread);
2011 jvmtiEventMonitorContendedEnter callback = env->callbacks()->MonitorContendedEnter;
2012 if (callback != NULL) {
2013 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_object());
2014 }
2015 }
2016 }
2017 }
2019 void JvmtiExport::post_monitor_contended_entered(JavaThread *thread, ObjectMonitor *obj_mntr) {
2020 oop object = (oop)obj_mntr->object();
2021 if (!ServiceUtil::visible_oop(object)) {
2022 // Ignore monitor contended entered for vm internal object.
2023 return;
2024 }
2025 JvmtiThreadState *state = thread->jvmti_thread_state();
2026 if (state == NULL) {
2027 return;
2028 }
2030 HandleMark hm(thread);
2031 Handle h(thread, object);
2033 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED,
2034 ("JVMTI [%s] montior contended entered event triggered",
2035 JvmtiTrace::safe_get_thread_name(thread)));
2037 JvmtiEnvThreadStateIterator it(state);
2038 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
2039 if (ets->is_enabled(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED)) {
2040 EVT_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED,
2041 ("JVMTI [%s] monitor contended enter event sent",
2042 JvmtiTrace::safe_get_thread_name(thread)));
2043 JvmtiMonitorEventMark jem(thread, h());
2044 JvmtiEnv *env = ets->get_env();
2045 JvmtiThreadEventTransition jet(thread);
2046 jvmtiEventMonitorContendedEntered callback = env->callbacks()->MonitorContendedEntered;
2047 if (callback != NULL) {
2048 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_object());
2049 }
2050 }
2051 }
2052 }
2054 void JvmtiExport::post_monitor_wait(JavaThread *thread, oop object,
2055 jlong timeout) {
2056 JvmtiThreadState *state = thread->jvmti_thread_state();
2057 if (state == NULL) {
2058 return;
2059 }
2061 HandleMark hm(thread);
2062 Handle h(thread, object);
2064 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_WAIT,
2065 ("JVMTI [%s] montior wait event triggered",
2066 JvmtiTrace::safe_get_thread_name(thread)));
2068 JvmtiEnvThreadStateIterator it(state);
2069 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
2070 if (ets->is_enabled(JVMTI_EVENT_MONITOR_WAIT)) {
2071 EVT_TRACE(JVMTI_EVENT_MONITOR_WAIT,
2072 ("JVMTI [%s] monitor wait event sent ",
2073 JvmtiTrace::safe_get_thread_name(thread)));
2074 JvmtiMonitorEventMark jem(thread, h());
2075 JvmtiEnv *env = ets->get_env();
2076 JvmtiThreadEventTransition jet(thread);
2077 jvmtiEventMonitorWait callback = env->callbacks()->MonitorWait;
2078 if (callback != NULL) {
2079 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
2080 jem.jni_object(), timeout);
2081 }
2082 }
2083 }
2084 }
2086 void JvmtiExport::post_monitor_waited(JavaThread *thread, ObjectMonitor *obj_mntr, jboolean timed_out) {
2087 oop object = (oop)obj_mntr->object();
2088 if (!ServiceUtil::visible_oop(object)) {
2089 // Ignore monitor waited for vm internal object.
2090 return;
2091 }
2092 JvmtiThreadState *state = thread->jvmti_thread_state();
2093 if (state == NULL) {
2094 return;
2095 }
2097 HandleMark hm(thread);
2098 Handle h(thread, object);
2100 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_WAITED,
2101 ("JVMTI [%s] montior waited event triggered",
2102 JvmtiTrace::safe_get_thread_name(thread)));
2104 JvmtiEnvThreadStateIterator it(state);
2105 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
2106 if (ets->is_enabled(JVMTI_EVENT_MONITOR_WAITED)) {
2107 EVT_TRACE(JVMTI_EVENT_MONITOR_WAITED,
2108 ("JVMTI [%s] monitor waited event sent ",
2109 JvmtiTrace::safe_get_thread_name(thread)));
2110 JvmtiMonitorEventMark jem(thread, h());
2111 JvmtiEnv *env = ets->get_env();
2112 JvmtiThreadEventTransition jet(thread);
2113 jvmtiEventMonitorWaited callback = env->callbacks()->MonitorWaited;
2114 if (callback != NULL) {
2115 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
2116 jem.jni_object(), timed_out);
2117 }
2118 }
2119 }
2120 }
2123 void JvmtiExport::post_vm_object_alloc(JavaThread *thread, oop object) {
2124 EVT_TRIG_TRACE(JVMTI_EVENT_VM_OBJECT_ALLOC, ("JVMTI [%s] Trg vm object alloc triggered",
2125 JvmtiTrace::safe_get_thread_name(thread)));
2126 if (object == NULL) {
2127 return;
2128 }
2129 HandleMark hm(thread);
2130 Handle h(thread, object);
2131 JvmtiEnvIterator it;
2132 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
2133 if (env->is_enabled(JVMTI_EVENT_VM_OBJECT_ALLOC)) {
2134 EVT_TRACE(JVMTI_EVENT_VM_OBJECT_ALLOC, ("JVMTI [%s] Evt vmobject alloc sent %s",
2135 JvmtiTrace::safe_get_thread_name(thread),
2136 object==NULL? "NULL" : java_lang_Class::as_Klass(object)->external_name()));
2138 JvmtiVMObjectAllocEventMark jem(thread, h());
2139 JvmtiJavaThreadEventTransition jet(thread);
2140 jvmtiEventVMObjectAlloc callback = env->callbacks()->VMObjectAlloc;
2141 if (callback != NULL) {
2142 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
2143 jem.jni_jobject(), jem.jni_class(), jem.size());
2144 }
2145 }
2146 }
2147 }
2149 ////////////////////////////////////////////////////////////////////////////////////////////////
2151 void JvmtiExport::cleanup_thread(JavaThread* thread) {
2152 assert(JavaThread::current() == thread, "thread is not current");
2153 MutexLocker mu(JvmtiThreadState_lock);
2155 if (thread->jvmti_thread_state() != NULL) {
2156 // This has to happen after the thread state is removed, which is
2157 // why it is not in post_thread_end_event like its complement
2158 // Maybe both these functions should be rolled into the posts?
2159 JvmtiEventController::thread_ended(thread);
2160 }
2161 }
2163 void JvmtiExport::oops_do(OopClosure* f) {
2164 JvmtiCurrentBreakpoints::oops_do(f);
2165 JvmtiVMObjectAllocEventCollector::oops_do_for_all_threads(f);
2166 }
2168 void JvmtiExport::weak_oops_do(BoolObjectClosure* is_alive, OopClosure* f) {
2169 JvmtiTagMap::weak_oops_do(is_alive, f);
2170 }
2172 void JvmtiExport::gc_epilogue() {
2173 JvmtiCurrentBreakpoints::gc_epilogue();
2174 }
2176 // Onload raw monitor transition.
2177 void JvmtiExport::transition_pending_onload_raw_monitors() {
2178 JvmtiPendingMonitors::transition_raw_monitors();
2179 }
2181 ////////////////////////////////////////////////////////////////////////////////////////////////
2183 // type for the Agent_OnAttach entry point
2184 extern "C" {
2185 typedef jint (JNICALL *OnAttachEntry_t)(JavaVM*, char *, void *);
2186 }
2188 jint JvmtiExport::load_agent_library(AttachOperation* op, outputStream* st) {
2189 char ebuf[1024];
2190 char buffer[JVM_MAXPATHLEN];
2191 void* library = NULL;
2192 jint result = JNI_ERR;
2194 // get agent name and options
2195 const char* agent = op->arg(0);
2196 const char* absParam = op->arg(1);
2197 const char* options = op->arg(2);
2199 // The abs paramter should be "true" or "false"
2200 bool is_absolute_path = (absParam != NULL) && (strcmp(absParam,"true")==0);
2203 // If the path is absolute we attempt to load the library. Otherwise we try to
2204 // load it from the standard dll directory.
2206 if (is_absolute_path) {
2207 library = os::dll_load(agent, ebuf, sizeof ebuf);
2208 } else {
2209 // Try to load the agent from the standard dll directory
2210 if (os::dll_build_name(buffer, sizeof(buffer), Arguments::get_dll_dir(),
2211 agent)) {
2212 library = os::dll_load(buffer, ebuf, sizeof ebuf);
2213 }
2214 if (library == NULL) {
2215 // not found - try local path
2216 char ns[1] = {0};
2217 if (os::dll_build_name(buffer, sizeof(buffer), ns, agent)) {
2218 library = os::dll_load(buffer, ebuf, sizeof ebuf);
2219 }
2220 }
2221 }
2223 // If the library was loaded then we attempt to invoke the Agent_OnAttach
2224 // function
2225 if (library != NULL) {
2227 // Lookup the Agent_OnAttach function
2228 OnAttachEntry_t on_attach_entry = NULL;
2229 const char *on_attach_symbols[] = AGENT_ONATTACH_SYMBOLS;
2230 for (uint symbol_index = 0; symbol_index < ARRAY_SIZE(on_attach_symbols); symbol_index++) {
2231 on_attach_entry =
2232 CAST_TO_FN_PTR(OnAttachEntry_t, os::dll_lookup(library, on_attach_symbols[symbol_index]));
2233 if (on_attach_entry != NULL) break;
2234 }
2236 if (on_attach_entry == NULL) {
2237 // Agent_OnAttach missing - unload library
2238 os::dll_unload(library);
2239 } else {
2240 // Invoke the Agent_OnAttach function
2241 JavaThread* THREAD = JavaThread::current();
2242 {
2243 extern struct JavaVM_ main_vm;
2244 JvmtiThreadEventMark jem(THREAD);
2245 JvmtiJavaThreadEventTransition jet(THREAD);
2247 result = (*on_attach_entry)(&main_vm, (char*)options, NULL);
2248 }
2250 // Agent_OnAttach may have used JNI
2251 if (HAS_PENDING_EXCEPTION) {
2252 CLEAR_PENDING_EXCEPTION;
2253 }
2255 // If OnAttach returns JNI_OK then we add it to the list of
2256 // agent libraries so that we can call Agent_OnUnload later.
2257 if (result == JNI_OK) {
2258 Arguments::add_loaded_agent(agent, (char*)options, is_absolute_path, library);
2259 }
2261 // Agent_OnAttach executed so completion status is JNI_OK
2262 st->print_cr("%d", result);
2263 result = JNI_OK;
2264 }
2265 }
2266 return result;
2267 }
2269 ////////////////////////////////////////////////////////////////////////////////////////////////
2271 // Setup current current thread for event collection.
2272 void JvmtiEventCollector::setup_jvmti_thread_state() {
2273 // set this event collector to be the current one.
2274 JvmtiThreadState* state = JvmtiThreadState::state_for(JavaThread::current());
2275 // state can only be NULL if the current thread is exiting which
2276 // should not happen since we're trying to configure for event collection
2277 guarantee(state != NULL, "exiting thread called setup_jvmti_thread_state");
2278 if (is_vm_object_alloc_event()) {
2279 _prev = state->get_vm_object_alloc_event_collector();
2280 state->set_vm_object_alloc_event_collector((JvmtiVMObjectAllocEventCollector *)this);
2281 } else if (is_dynamic_code_event()) {
2282 _prev = state->get_dynamic_code_event_collector();
2283 state->set_dynamic_code_event_collector((JvmtiDynamicCodeEventCollector *)this);
2284 }
2285 }
2287 // Unset current event collection in this thread and reset it with previous
2288 // collector.
2289 void JvmtiEventCollector::unset_jvmti_thread_state() {
2290 JvmtiThreadState* state = JavaThread::current()->jvmti_thread_state();
2291 if (state != NULL) {
2292 // restore the previous event collector (if any)
2293 if (is_vm_object_alloc_event()) {
2294 if (state->get_vm_object_alloc_event_collector() == this) {
2295 state->set_vm_object_alloc_event_collector((JvmtiVMObjectAllocEventCollector *)_prev);
2296 } else {
2297 // this thread's jvmti state was created during the scope of
2298 // the event collector.
2299 }
2300 } else {
2301 if (is_dynamic_code_event()) {
2302 if (state->get_dynamic_code_event_collector() == this) {
2303 state->set_dynamic_code_event_collector((JvmtiDynamicCodeEventCollector *)_prev);
2304 } else {
2305 // this thread's jvmti state was created during the scope of
2306 // the event collector.
2307 }
2308 }
2309 }
2310 }
2311 }
2313 // create the dynamic code event collector
2314 JvmtiDynamicCodeEventCollector::JvmtiDynamicCodeEventCollector() : _code_blobs(NULL) {
2315 if (JvmtiExport::should_post_dynamic_code_generated()) {
2316 setup_jvmti_thread_state();
2317 }
2318 }
2320 // iterate over any code blob descriptors collected and post a
2321 // DYNAMIC_CODE_GENERATED event to the profiler.
2322 JvmtiDynamicCodeEventCollector::~JvmtiDynamicCodeEventCollector() {
2323 assert(!JavaThread::current()->owns_locks(), "all locks must be released to post deferred events");
2324 // iterate over any code blob descriptors that we collected
2325 if (_code_blobs != NULL) {
2326 for (int i=0; i<_code_blobs->length(); i++) {
2327 JvmtiCodeBlobDesc* blob = _code_blobs->at(i);
2328 JvmtiExport::post_dynamic_code_generated(blob->name(), blob->code_begin(), blob->code_end());
2329 FreeHeap(blob);
2330 }
2331 delete _code_blobs;
2332 }
2333 unset_jvmti_thread_state();
2334 }
2336 // register a stub
2337 void JvmtiDynamicCodeEventCollector::register_stub(const char* name, address start, address end) {
2338 if (_code_blobs == NULL) {
2339 _code_blobs = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<JvmtiCodeBlobDesc*>(1,true);
2340 }
2341 _code_blobs->append(new JvmtiCodeBlobDesc(name, start, end));
2342 }
2344 // Setup current thread to record vm allocated objects.
2345 JvmtiVMObjectAllocEventCollector::JvmtiVMObjectAllocEventCollector() : _allocated(NULL) {
2346 if (JvmtiExport::should_post_vm_object_alloc()) {
2347 _enable = true;
2348 setup_jvmti_thread_state();
2349 } else {
2350 _enable = false;
2351 }
2352 }
2354 // Post vm_object_alloc event for vm allocated objects visible to java
2355 // world.
2356 JvmtiVMObjectAllocEventCollector::~JvmtiVMObjectAllocEventCollector() {
2357 if (_allocated != NULL) {
2358 set_enabled(false);
2359 for (int i = 0; i < _allocated->length(); i++) {
2360 oop obj = _allocated->at(i);
2361 if (ServiceUtil::visible_oop(obj)) {
2362 JvmtiExport::post_vm_object_alloc(JavaThread::current(), obj);
2363 }
2364 }
2365 delete _allocated;
2366 }
2367 unset_jvmti_thread_state();
2368 }
2370 void JvmtiVMObjectAllocEventCollector::record_allocation(oop obj) {
2371 assert(is_enabled(), "VM object alloc event collector is not enabled");
2372 if (_allocated == NULL) {
2373 _allocated = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<oop>(1, true);
2374 }
2375 _allocated->push(obj);
2376 }
2378 // GC support.
2379 void JvmtiVMObjectAllocEventCollector::oops_do(OopClosure* f) {
2380 if (_allocated != NULL) {
2381 for(int i=_allocated->length() - 1; i >= 0; i--) {
2382 if (_allocated->at(i) != NULL) {
2383 f->do_oop(_allocated->adr_at(i));
2384 }
2385 }
2386 }
2387 }
2389 void JvmtiVMObjectAllocEventCollector::oops_do_for_all_threads(OopClosure* f) {
2390 // no-op if jvmti not enabled
2391 if (!JvmtiEnv::environments_might_exist()) {
2392 return;
2393 }
2395 // Runs at safepoint. So no need to acquire Threads_lock.
2396 for (JavaThread *jthr = Threads::first(); jthr != NULL; jthr = jthr->next()) {
2397 JvmtiThreadState *state = jthr->jvmti_thread_state();
2398 if (state != NULL) {
2399 JvmtiVMObjectAllocEventCollector *collector;
2400 collector = state->get_vm_object_alloc_event_collector();
2401 while (collector != NULL) {
2402 collector->oops_do(f);
2403 collector = (JvmtiVMObjectAllocEventCollector *)collector->get_prev();
2404 }
2405 }
2406 }
2407 }
2410 // Disable collection of VMObjectAlloc events
2411 NoJvmtiVMObjectAllocMark::NoJvmtiVMObjectAllocMark() : _collector(NULL) {
2412 // a no-op if VMObjectAlloc event is not enabled
2413 if (!JvmtiExport::should_post_vm_object_alloc()) {
2414 return;
2415 }
2416 Thread* thread = ThreadLocalStorage::thread();
2417 if (thread != NULL && thread->is_Java_thread()) {
2418 JavaThread* current_thread = (JavaThread*)thread;
2419 JvmtiThreadState *state = current_thread->jvmti_thread_state();
2420 if (state != NULL) {
2421 JvmtiVMObjectAllocEventCollector *collector;
2422 collector = state->get_vm_object_alloc_event_collector();
2423 if (collector != NULL && collector->is_enabled()) {
2424 _collector = collector;
2425 _collector->set_enabled(false);
2426 }
2427 }
2428 }
2429 }
2431 // Re-Enable collection of VMObjectAlloc events (if previously enabled)
2432 NoJvmtiVMObjectAllocMark::~NoJvmtiVMObjectAllocMark() {
2433 if (was_enabled()) {
2434 _collector->set_enabled(true);
2435 }
2436 };
2438 JvmtiGCMarker::JvmtiGCMarker() {
2439 // if there aren't any JVMTI environments then nothing to do
2440 if (!JvmtiEnv::environments_might_exist()) {
2441 return;
2442 }
2444 if (JvmtiExport::should_post_garbage_collection_start()) {
2445 JvmtiExport::post_garbage_collection_start();
2446 }
2448 if (SafepointSynchronize::is_at_safepoint()) {
2449 // Do clean up tasks that need to be done at a safepoint
2450 JvmtiEnvBase::check_for_periodic_clean_up();
2451 }
2452 }
2454 JvmtiGCMarker::~JvmtiGCMarker() {
2455 // if there aren't any JVMTI environments then nothing to do
2456 if (!JvmtiEnv::environments_might_exist()) {
2457 return;
2458 }
2460 // JVMTI notify gc finish
2461 if (JvmtiExport::should_post_garbage_collection_finish()) {
2462 JvmtiExport::post_garbage_collection_finish();
2463 }
2464 }
