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src/share/vm/prims/jvmtiExport.cpp@9ce110b1d14a
src/share/vm/prims/jvmtiExport.cpp
Thu, 02 May 2013 18:50:05 -0700
- author
- kvn
- date
- Thu, 02 May 2013 18:50:05 -0700
- changeset 5040
- 9ce110b1d14a
- parent 4544
- 3c9bc17b9403
- child 5095
- 0b7f78069732
- permissions
- -rw-r--r--
Merge
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 memcpy(*_cached_data_ptr, _curr_data, _curr_len);
623 *_cached_length_ptr = _curr_len;
624 }
626 if (_curr_data != *_data_ptr) {
627 // curr_data is previous agent modified class data.
628 // And this has been changed by the new agent so
629 // we can delete it now.
630 _curr_env->Deallocate(_curr_data);
631 }
633 // Class file data has changed by the current agent.
634 _curr_data = new_data;
635 _curr_len = new_len;
636 // Save the current agent env we need this to deallocate the
637 // memory allocated by this agent.
638 _curr_env = env;
639 }
640 }
642 void copy_modified_data() {
643 // if one of the agent has modified class file data.
644 // Copy modified class data to new resources array.
645 if (_curr_data != *_data_ptr) {
646 *_data_ptr = NEW_RESOURCE_ARRAY(u1, _curr_len);
647 memcpy(*_data_ptr, _curr_data, _curr_len);
648 *_end_ptr = *_data_ptr + _curr_len;
649 _curr_env->Deallocate(_curr_data);
650 }
651 }
652 };
654 bool JvmtiExport::_should_post_class_file_load_hook = false;
656 // this entry is for class file load hook on class load, redefine and retransform
657 void JvmtiExport::post_class_file_load_hook(Symbol* h_name,
658 Handle class_loader,
659 Handle h_protection_domain,
660 unsigned char **data_ptr,
661 unsigned char **end_ptr,
662 unsigned char **cached_data_ptr,
663 jint *cached_length_ptr) {
664 JvmtiClassFileLoadHookPoster poster(h_name, class_loader,
665 h_protection_domain,
666 data_ptr, end_ptr,
667 cached_data_ptr,
668 cached_length_ptr);
669 poster.post();
670 }
672 void JvmtiExport::report_unsupported(bool on) {
673 // If any JVMTI service is turned on, we need to exit before native code
674 // tries to access nonexistant services.
675 if (on) {
676 vm_exit_during_initialization("Java Kernel does not support JVMTI.");
677 }
678 }
681 static inline Klass* oop_to_klass(oop obj) {
682 Klass* k = obj->klass();
684 // if the object is a java.lang.Class then return the java mirror
685 if (k == SystemDictionary::Class_klass()) {
686 if (!java_lang_Class::is_primitive(obj)) {
687 k = java_lang_Class::as_Klass(obj);
688 assert(k != NULL, "class for non-primitive mirror must exist");
689 }
690 }
691 return k;
692 }
694 class JvmtiVMObjectAllocEventMark : public JvmtiClassEventMark {
695 private:
696 jobject _jobj;
697 jlong _size;
698 public:
699 JvmtiVMObjectAllocEventMark(JavaThread *thread, oop obj) : JvmtiClassEventMark(thread, oop_to_klass(obj)) {
700 _jobj = (jobject)to_jobject(obj);
701 _size = obj->size() * wordSize;
702 };
703 jobject jni_jobject() { return _jobj; }
704 jlong size() { return _size; }
705 };
707 class JvmtiCompiledMethodLoadEventMark : public JvmtiMethodEventMark {
708 private:
709 jint _code_size;
710 const void *_code_data;
711 jint _map_length;
712 jvmtiAddrLocationMap *_map;
713 const void *_compile_info;
714 public:
715 JvmtiCompiledMethodLoadEventMark(JavaThread *thread, nmethod *nm, void* compile_info_ptr = NULL)
716 : JvmtiMethodEventMark(thread,methodHandle(thread, nm->method())) {
717 _code_data = nm->insts_begin();
718 _code_size = nm->insts_size();
719 _compile_info = compile_info_ptr; // Set void pointer of compiledMethodLoad Event. Default value is NULL.
720 JvmtiCodeBlobEvents::build_jvmti_addr_location_map(nm, &_map, &_map_length);
721 }
722 ~JvmtiCompiledMethodLoadEventMark() {
723 FREE_C_HEAP_ARRAY(jvmtiAddrLocationMap, _map, mtInternal);
724 }
726 jint code_size() { return _code_size; }
727 const void *code_data() { return _code_data; }
728 jint map_length() { return _map_length; }
729 const jvmtiAddrLocationMap* map() { return _map; }
730 const void *compile_info() { return _compile_info; }
731 };
735 class JvmtiMonitorEventMark : public JvmtiThreadEventMark {
736 private:
737 jobject _jobj;
738 public:
739 JvmtiMonitorEventMark(JavaThread *thread, oop object)
740 : JvmtiThreadEventMark(thread){
741 _jobj = to_jobject(object);
742 }
743 jobject jni_object() { return _jobj; }
744 };
746 ///////////////////////////////////////////////////////////////
747 //
748 // pending CompiledMethodUnload support
749 //
751 void JvmtiExport::post_compiled_method_unload(
752 jmethodID method, const void *code_begin) {
753 JavaThread* thread = JavaThread::current();
754 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_UNLOAD,
755 ("JVMTI [%s] method compile unload event triggered",
756 JvmtiTrace::safe_get_thread_name(thread)));
758 // post the event for each environment that has this event enabled.
759 JvmtiEnvIterator it;
760 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
761 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_UNLOAD)) {
763 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_UNLOAD,
764 ("JVMTI [%s] class compile method unload event sent jmethodID " PTR_FORMAT,
765 JvmtiTrace::safe_get_thread_name(thread), method));
767 ResourceMark rm(thread);
769 JvmtiEventMark jem(thread);
770 JvmtiJavaThreadEventTransition jet(thread);
771 jvmtiEventCompiledMethodUnload callback = env->callbacks()->CompiledMethodUnload;
772 if (callback != NULL) {
773 (*callback)(env->jvmti_external(), method, code_begin);
774 }
775 }
776 }
777 }
779 ///////////////////////////////////////////////////////////////
780 //
781 // JvmtiExport
782 //
784 void JvmtiExport::post_raw_breakpoint(JavaThread *thread, Method* method, address location) {
785 HandleMark hm(thread);
786 methodHandle mh(thread, method);
788 JvmtiThreadState *state = thread->jvmti_thread_state();
789 if (state == NULL) {
790 return;
791 }
792 EVT_TRIG_TRACE(JVMTI_EVENT_BREAKPOINT, ("JVMTI [%s] Trg Breakpoint triggered",
793 JvmtiTrace::safe_get_thread_name(thread)));
794 JvmtiEnvThreadStateIterator it(state);
795 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
796 ets->compare_and_set_current_location(mh(), location, JVMTI_EVENT_BREAKPOINT);
797 if (!ets->breakpoint_posted() && ets->is_enabled(JVMTI_EVENT_BREAKPOINT)) {
798 ThreadState old_os_state = thread->osthread()->get_state();
799 thread->osthread()->set_state(BREAKPOINTED);
800 EVT_TRACE(JVMTI_EVENT_BREAKPOINT, ("JVMTI [%s] Evt Breakpoint sent %s.%s @ %d",
801 JvmtiTrace::safe_get_thread_name(thread),
802 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
803 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
804 location - mh()->code_base() ));
806 JvmtiEnv *env = ets->get_env();
807 JvmtiLocationEventMark jem(thread, mh, location);
808 JvmtiJavaThreadEventTransition jet(thread);
809 jvmtiEventBreakpoint callback = env->callbacks()->Breakpoint;
810 if (callback != NULL) {
811 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
812 jem.jni_methodID(), jem.location());
813 }
815 ets->set_breakpoint_posted();
816 thread->osthread()->set_state(old_os_state);
817 }
818 }
819 }
821 //////////////////////////////////////////////////////////////////////////////
823 bool JvmtiExport::_can_get_source_debug_extension = false;
824 bool JvmtiExport::_can_maintain_original_method_order = false;
825 bool JvmtiExport::_can_post_interpreter_events = false;
826 bool JvmtiExport::_can_post_on_exceptions = false;
827 bool JvmtiExport::_can_post_breakpoint = false;
828 bool JvmtiExport::_can_post_field_access = false;
829 bool JvmtiExport::_can_post_field_modification = false;
830 bool JvmtiExport::_can_post_method_entry = false;
831 bool JvmtiExport::_can_post_method_exit = false;
832 bool JvmtiExport::_can_pop_frame = false;
833 bool JvmtiExport::_can_force_early_return = false;
835 bool JvmtiExport::_should_post_single_step = false;
836 bool JvmtiExport::_should_post_field_access = false;
837 bool JvmtiExport::_should_post_field_modification = false;
838 bool JvmtiExport::_should_post_class_load = false;
839 bool JvmtiExport::_should_post_class_prepare = false;
840 bool JvmtiExport::_should_post_class_unload = false;
841 bool JvmtiExport::_should_post_thread_life = false;
842 bool JvmtiExport::_should_clean_up_heap_objects = false;
843 bool JvmtiExport::_should_post_native_method_bind = false;
844 bool JvmtiExport::_should_post_dynamic_code_generated = false;
845 bool JvmtiExport::_should_post_data_dump = false;
846 bool JvmtiExport::_should_post_compiled_method_load = false;
847 bool JvmtiExport::_should_post_compiled_method_unload = false;
848 bool JvmtiExport::_should_post_monitor_contended_enter = false;
849 bool JvmtiExport::_should_post_monitor_contended_entered = false;
850 bool JvmtiExport::_should_post_monitor_wait = false;
851 bool JvmtiExport::_should_post_monitor_waited = false;
852 bool JvmtiExport::_should_post_garbage_collection_start = false;
853 bool JvmtiExport::_should_post_garbage_collection_finish = false;
854 bool JvmtiExport::_should_post_object_free = false;
855 bool JvmtiExport::_should_post_resource_exhausted = false;
856 bool JvmtiExport::_should_post_vm_object_alloc = false;
857 bool JvmtiExport::_should_post_on_exceptions = false;
859 ////////////////////////////////////////////////////////////////////////////////////////////////
862 //
863 // JVMTI single step management
864 //
865 void JvmtiExport::at_single_stepping_point(JavaThread *thread, Method* method, address location) {
866 assert(JvmtiExport::should_post_single_step(), "must be single stepping");
868 HandleMark hm(thread);
869 methodHandle mh(thread, method);
871 // update information about current location and post a step event
872 JvmtiThreadState *state = thread->jvmti_thread_state();
873 if (state == NULL) {
874 return;
875 }
876 EVT_TRIG_TRACE(JVMTI_EVENT_SINGLE_STEP, ("JVMTI [%s] Trg Single Step triggered",
877 JvmtiTrace::safe_get_thread_name(thread)));
878 if (!state->hide_single_stepping()) {
879 if (state->is_pending_step_for_popframe()) {
880 state->process_pending_step_for_popframe();
881 }
882 if (state->is_pending_step_for_earlyret()) {
883 state->process_pending_step_for_earlyret();
884 }
885 JvmtiExport::post_single_step(thread, mh(), location);
886 }
887 }
890 void JvmtiExport::expose_single_stepping(JavaThread *thread) {
891 JvmtiThreadState *state = thread->jvmti_thread_state();
892 if (state != NULL) {
893 state->clear_hide_single_stepping();
894 }
895 }
898 bool JvmtiExport::hide_single_stepping(JavaThread *thread) {
899 JvmtiThreadState *state = thread->jvmti_thread_state();
900 if (state != NULL && state->is_enabled(JVMTI_EVENT_SINGLE_STEP)) {
901 state->set_hide_single_stepping();
902 return true;
903 } else {
904 return false;
905 }
906 }
908 void JvmtiExport::post_class_load(JavaThread *thread, Klass* klass) {
909 HandleMark hm(thread);
910 KlassHandle kh(thread, klass);
912 EVT_TRIG_TRACE(JVMTI_EVENT_CLASS_LOAD, ("JVMTI [%s] Trg Class Load triggered",
913 JvmtiTrace::safe_get_thread_name(thread)));
914 JvmtiThreadState* state = thread->jvmti_thread_state();
915 if (state == NULL) {
916 return;
917 }
918 JvmtiEnvThreadStateIterator it(state);
919 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
920 if (ets->is_enabled(JVMTI_EVENT_CLASS_LOAD)) {
921 EVT_TRACE(JVMTI_EVENT_CLASS_LOAD, ("JVMTI [%s] Evt Class Load sent %s",
922 JvmtiTrace::safe_get_thread_name(thread),
923 kh()==NULL? "NULL" : kh()->external_name() ));
925 JvmtiEnv *env = ets->get_env();
926 JvmtiClassEventMark jem(thread, kh());
927 JvmtiJavaThreadEventTransition jet(thread);
928 jvmtiEventClassLoad callback = env->callbacks()->ClassLoad;
929 if (callback != NULL) {
930 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_class());
931 }
932 }
933 }
934 }
937 void JvmtiExport::post_class_prepare(JavaThread *thread, Klass* klass) {
938 HandleMark hm(thread);
939 KlassHandle kh(thread, klass);
941 EVT_TRIG_TRACE(JVMTI_EVENT_CLASS_PREPARE, ("JVMTI [%s] Trg Class Prepare triggered",
942 JvmtiTrace::safe_get_thread_name(thread)));
943 JvmtiThreadState* state = thread->jvmti_thread_state();
944 if (state == NULL) {
945 return;
946 }
947 JvmtiEnvThreadStateIterator it(state);
948 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
949 if (ets->is_enabled(JVMTI_EVENT_CLASS_PREPARE)) {
950 EVT_TRACE(JVMTI_EVENT_CLASS_PREPARE, ("JVMTI [%s] Evt Class Prepare sent %s",
951 JvmtiTrace::safe_get_thread_name(thread),
952 kh()==NULL? "NULL" : kh()->external_name() ));
954 JvmtiEnv *env = ets->get_env();
955 JvmtiClassEventMark jem(thread, kh());
956 JvmtiJavaThreadEventTransition jet(thread);
957 jvmtiEventClassPrepare callback = env->callbacks()->ClassPrepare;
958 if (callback != NULL) {
959 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_class());
960 }
961 }
962 }
963 }
965 void JvmtiExport::post_class_unload(Klass* klass) {
966 Thread *thread = Thread::current();
967 HandleMark hm(thread);
968 KlassHandle kh(thread, klass);
970 EVT_TRIG_TRACE(EXT_EVENT_CLASS_UNLOAD, ("JVMTI [?] Trg Class Unload triggered" ));
971 if (JvmtiEventController::is_enabled((jvmtiEvent)EXT_EVENT_CLASS_UNLOAD)) {
972 assert(thread->is_VM_thread(), "wrong thread");
974 // get JavaThread for whom we are proxy
975 JavaThread *real_thread =
976 (JavaThread *)((VMThread *)thread)->vm_operation()->calling_thread();
978 JvmtiEnvIterator it;
979 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
980 if (env->is_enabled((jvmtiEvent)EXT_EVENT_CLASS_UNLOAD)) {
981 EVT_TRACE(EXT_EVENT_CLASS_UNLOAD, ("JVMTI [?] Evt Class Unload sent %s",
982 kh()==NULL? "NULL" : kh()->external_name() ));
984 // do everything manually, since this is a proxy - needs special care
985 JNIEnv* jni_env = real_thread->jni_environment();
986 jthread jt = (jthread)JNIHandles::make_local(real_thread, real_thread->threadObj());
987 jclass jk = (jclass)JNIHandles::make_local(real_thread, kh()->java_mirror());
989 // Before we call the JVMTI agent, we have to set the state in the
990 // thread for which we are proxying.
991 JavaThreadState prev_state = real_thread->thread_state();
992 assert(prev_state == _thread_blocked, "JavaThread should be at safepoint");
993 real_thread->set_thread_state(_thread_in_native);
995 jvmtiExtensionEvent callback = env->ext_callbacks()->ClassUnload;
996 if (callback != NULL) {
997 (*callback)(env->jvmti_external(), jni_env, jt, jk);
998 }
1000 assert(real_thread->thread_state() == _thread_in_native,
1001 "JavaThread should be in native");
1002 real_thread->set_thread_state(prev_state);
1004 JNIHandles::destroy_local(jk);
1005 JNIHandles::destroy_local(jt);
1006 }
1007 }
1008 }
1009 }
1012 void JvmtiExport::post_thread_start(JavaThread *thread) {
1013 assert(thread->thread_state() == _thread_in_vm, "must be in vm state");
1015 EVT_TRIG_TRACE(JVMTI_EVENT_THREAD_START, ("JVMTI [%s] Trg Thread Start event triggered",
1016 JvmtiTrace::safe_get_thread_name(thread)));
1018 // do JVMTI thread initialization (if needed)
1019 JvmtiEventController::thread_started(thread);
1021 // Do not post thread start event for hidden java thread.
1022 if (JvmtiEventController::is_enabled(JVMTI_EVENT_THREAD_START) &&
1023 !thread->is_hidden_from_external_view()) {
1024 JvmtiEnvIterator it;
1025 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1026 if (env->is_enabled(JVMTI_EVENT_THREAD_START)) {
1027 EVT_TRACE(JVMTI_EVENT_THREAD_START, ("JVMTI [%s] Evt Thread Start event sent",
1028 JvmtiTrace::safe_get_thread_name(thread) ));
1030 JvmtiThreadEventMark jem(thread);
1031 JvmtiJavaThreadEventTransition jet(thread);
1032 jvmtiEventThreadStart callback = env->callbacks()->ThreadStart;
1033 if (callback != NULL) {
1034 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread());
1035 }
1036 }
1037 }
1038 }
1039 }
1042 void JvmtiExport::post_thread_end(JavaThread *thread) {
1043 EVT_TRIG_TRACE(JVMTI_EVENT_THREAD_END, ("JVMTI [%s] Trg Thread End event triggered",
1044 JvmtiTrace::safe_get_thread_name(thread)));
1046 JvmtiThreadState *state = thread->jvmti_thread_state();
1047 if (state == NULL) {
1048 return;
1049 }
1051 // Do not post thread end event for hidden java thread.
1052 if (state->is_enabled(JVMTI_EVENT_THREAD_END) &&
1053 !thread->is_hidden_from_external_view()) {
1055 JvmtiEnvThreadStateIterator it(state);
1056 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1057 if (ets->is_enabled(JVMTI_EVENT_THREAD_END)) {
1058 EVT_TRACE(JVMTI_EVENT_THREAD_END, ("JVMTI [%s] Evt Thread End event sent",
1059 JvmtiTrace::safe_get_thread_name(thread) ));
1061 JvmtiEnv *env = ets->get_env();
1062 JvmtiThreadEventMark jem(thread);
1063 JvmtiJavaThreadEventTransition jet(thread);
1064 jvmtiEventThreadEnd callback = env->callbacks()->ThreadEnd;
1065 if (callback != NULL) {
1066 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread());
1067 }
1068 }
1069 }
1070 }
1071 }
1073 void JvmtiExport::post_object_free(JvmtiEnv* env, jlong tag) {
1074 assert(SafepointSynchronize::is_at_safepoint(), "must be executed at safepoint");
1075 assert(env->is_enabled(JVMTI_EVENT_OBJECT_FREE), "checking");
1077 EVT_TRIG_TRACE(JVMTI_EVENT_OBJECT_FREE, ("JVMTI [?] Trg Object Free triggered" ));
1078 EVT_TRACE(JVMTI_EVENT_OBJECT_FREE, ("JVMTI [?] Evt Object Free sent"));
1080 jvmtiEventObjectFree callback = env->callbacks()->ObjectFree;
1081 if (callback != NULL) {
1082 (*callback)(env->jvmti_external(), tag);
1083 }
1084 }
1086 void JvmtiExport::post_resource_exhausted(jint resource_exhausted_flags, const char* description) {
1087 EVT_TRIG_TRACE(JVMTI_EVENT_RESOURCE_EXHAUSTED, ("JVMTI Trg resource exhausted event triggered" ));
1089 JvmtiEnvIterator it;
1090 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1091 if (env->is_enabled(JVMTI_EVENT_RESOURCE_EXHAUSTED)) {
1092 EVT_TRACE(JVMTI_EVENT_RESOURCE_EXHAUSTED, ("JVMTI Evt resource exhausted event sent" ));
1094 JavaThread *thread = JavaThread::current();
1095 JvmtiThreadEventMark jem(thread);
1096 JvmtiJavaThreadEventTransition jet(thread);
1097 jvmtiEventResourceExhausted callback = env->callbacks()->ResourceExhausted;
1098 if (callback != NULL) {
1099 (*callback)(env->jvmti_external(), jem.jni_env(),
1100 resource_exhausted_flags, NULL, description);
1101 }
1102 }
1103 }
1104 }
1106 void JvmtiExport::post_method_entry(JavaThread *thread, Method* method, frame current_frame) {
1107 HandleMark hm(thread);
1108 methodHandle mh(thread, method);
1110 EVT_TRIG_TRACE(JVMTI_EVENT_METHOD_ENTRY, ("JVMTI [%s] Trg Method Entry triggered %s.%s",
1111 JvmtiTrace::safe_get_thread_name(thread),
1112 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1113 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1115 JvmtiThreadState* state = thread->jvmti_thread_state();
1116 if (state == NULL || !state->is_interp_only_mode()) {
1117 // for any thread that actually wants method entry, interp_only_mode is set
1118 return;
1119 }
1121 state->incr_cur_stack_depth();
1123 if (state->is_enabled(JVMTI_EVENT_METHOD_ENTRY)) {
1124 JvmtiEnvThreadStateIterator it(state);
1125 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1126 if (ets->is_enabled(JVMTI_EVENT_METHOD_ENTRY)) {
1127 EVT_TRACE(JVMTI_EVENT_METHOD_ENTRY, ("JVMTI [%s] Evt Method Entry sent %s.%s",
1128 JvmtiTrace::safe_get_thread_name(thread),
1129 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1130 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1132 JvmtiEnv *env = ets->get_env();
1133 JvmtiMethodEventMark jem(thread, mh);
1134 JvmtiJavaThreadEventTransition jet(thread);
1135 jvmtiEventMethodEntry callback = env->callbacks()->MethodEntry;
1136 if (callback != NULL) {
1137 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_methodID());
1138 }
1139 }
1140 }
1141 }
1142 }
1144 void JvmtiExport::post_method_exit(JavaThread *thread, Method* method, frame current_frame) {
1145 HandleMark hm(thread);
1146 methodHandle mh(thread, method);
1148 EVT_TRIG_TRACE(JVMTI_EVENT_METHOD_EXIT, ("JVMTI [%s] Trg Method Exit triggered %s.%s",
1149 JvmtiTrace::safe_get_thread_name(thread),
1150 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1151 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1153 JvmtiThreadState *state = thread->jvmti_thread_state();
1154 if (state == NULL || !state->is_interp_only_mode()) {
1155 // for any thread that actually wants method exit, interp_only_mode is set
1156 return;
1157 }
1159 // return a flag when a method terminates by throwing an exception
1160 // i.e. if an exception is thrown and it's not caught by the current method
1161 bool exception_exit = state->is_exception_detected() && !state->is_exception_caught();
1164 if (state->is_enabled(JVMTI_EVENT_METHOD_EXIT)) {
1165 Handle result;
1166 jvalue value;
1167 value.j = 0L;
1169 // if the method hasn't been popped because of an exception then we populate
1170 // the return_value parameter for the callback. At this point we only have
1171 // the address of a "raw result" and we just call into the interpreter to
1172 // convert this into a jvalue.
1173 if (!exception_exit) {
1174 oop oop_result;
1175 BasicType type = current_frame.interpreter_frame_result(&oop_result, &value);
1176 if (type == T_OBJECT || type == T_ARRAY) {
1177 result = Handle(thread, oop_result);
1178 }
1179 }
1181 JvmtiEnvThreadStateIterator it(state);
1182 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1183 if (ets->is_enabled(JVMTI_EVENT_METHOD_EXIT)) {
1184 EVT_TRACE(JVMTI_EVENT_METHOD_EXIT, ("JVMTI [%s] Evt Method Exit sent %s.%s",
1185 JvmtiTrace::safe_get_thread_name(thread),
1186 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1187 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1189 JvmtiEnv *env = ets->get_env();
1190 JvmtiMethodEventMark jem(thread, mh);
1191 if (result.not_null()) {
1192 value.l = JNIHandles::make_local(thread, result());
1193 }
1194 JvmtiJavaThreadEventTransition jet(thread);
1195 jvmtiEventMethodExit callback = env->callbacks()->MethodExit;
1196 if (callback != NULL) {
1197 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1198 jem.jni_methodID(), exception_exit, value);
1199 }
1200 }
1201 }
1202 }
1204 if (state->is_enabled(JVMTI_EVENT_FRAME_POP)) {
1205 JvmtiEnvThreadStateIterator it(state);
1206 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1207 int cur_frame_number = state->cur_stack_depth();
1209 if (ets->is_frame_pop(cur_frame_number)) {
1210 // we have a NotifyFramePop entry for this frame.
1211 // now check that this env/thread wants this event
1212 if (ets->is_enabled(JVMTI_EVENT_FRAME_POP)) {
1213 EVT_TRACE(JVMTI_EVENT_FRAME_POP, ("JVMTI [%s] Evt Frame Pop sent %s.%s",
1214 JvmtiTrace::safe_get_thread_name(thread),
1215 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1216 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1218 // we also need to issue a frame pop event for this frame
1219 JvmtiEnv *env = ets->get_env();
1220 JvmtiMethodEventMark jem(thread, mh);
1221 JvmtiJavaThreadEventTransition jet(thread);
1222 jvmtiEventFramePop callback = env->callbacks()->FramePop;
1223 if (callback != NULL) {
1224 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1225 jem.jni_methodID(), exception_exit);
1226 }
1227 }
1228 // remove the frame's entry
1229 ets->clear_frame_pop(cur_frame_number);
1230 }
1231 }
1232 }
1234 state->decr_cur_stack_depth();
1235 }
1238 // Todo: inline this for optimization
1239 void JvmtiExport::post_single_step(JavaThread *thread, Method* method, address location) {
1240 HandleMark hm(thread);
1241 methodHandle mh(thread, method);
1243 JvmtiThreadState *state = thread->jvmti_thread_state();
1244 if (state == NULL) {
1245 return;
1246 }
1247 JvmtiEnvThreadStateIterator it(state);
1248 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1249 ets->compare_and_set_current_location(mh(), location, JVMTI_EVENT_SINGLE_STEP);
1250 if (!ets->single_stepping_posted() && ets->is_enabled(JVMTI_EVENT_SINGLE_STEP)) {
1251 EVT_TRACE(JVMTI_EVENT_SINGLE_STEP, ("JVMTI [%s] Evt Single Step sent %s.%s @ %d",
1252 JvmtiTrace::safe_get_thread_name(thread),
1253 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1254 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1255 location - mh()->code_base() ));
1257 JvmtiEnv *env = ets->get_env();
1258 JvmtiLocationEventMark jem(thread, mh, location);
1259 JvmtiJavaThreadEventTransition jet(thread);
1260 jvmtiEventSingleStep callback = env->callbacks()->SingleStep;
1261 if (callback != NULL) {
1262 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1263 jem.jni_methodID(), jem.location());
1264 }
1266 ets->set_single_stepping_posted();
1267 }
1268 }
1269 }
1272 void JvmtiExport::post_exception_throw(JavaThread *thread, Method* method, address location, oop exception) {
1273 HandleMark hm(thread);
1274 methodHandle mh(thread, method);
1275 Handle exception_handle(thread, exception);
1277 JvmtiThreadState *state = thread->jvmti_thread_state();
1278 if (state == NULL) {
1279 return;
1280 }
1282 EVT_TRIG_TRACE(JVMTI_EVENT_EXCEPTION, ("JVMTI [%s] Trg Exception thrown triggered",
1283 JvmtiTrace::safe_get_thread_name(thread)));
1284 if (!state->is_exception_detected()) {
1285 state->set_exception_detected();
1286 JvmtiEnvThreadStateIterator it(state);
1287 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1288 if (ets->is_enabled(JVMTI_EVENT_EXCEPTION) && (exception != NULL)) {
1290 EVT_TRACE(JVMTI_EVENT_EXCEPTION,
1291 ("JVMTI [%s] Evt Exception thrown sent %s.%s @ %d",
1292 JvmtiTrace::safe_get_thread_name(thread),
1293 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1294 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1295 location - mh()->code_base() ));
1297 JvmtiEnv *env = ets->get_env();
1298 JvmtiExceptionEventMark jem(thread, mh, location, exception_handle);
1300 // It's okay to clear these exceptions here because we duplicate
1301 // this lookup in InterpreterRuntime::exception_handler_for_exception.
1302 EXCEPTION_MARK;
1304 bool should_repeat;
1305 vframeStream st(thread);
1306 assert(!st.at_end(), "cannot be at end");
1307 Method* current_method = NULL;
1308 // A GC may occur during the Method::fast_exception_handler_bci_for()
1309 // call below if it needs to load the constraint class. Using a
1310 // methodHandle to keep the 'current_method' from being deallocated
1311 // if GC happens.
1312 methodHandle current_mh = methodHandle(thread, current_method);
1313 int current_bci = -1;
1314 do {
1315 current_method = st.method();
1316 current_mh = methodHandle(thread, current_method);
1317 current_bci = st.bci();
1318 do {
1319 should_repeat = false;
1320 KlassHandle eh_klass(thread, exception_handle()->klass());
1321 current_bci = Method::fast_exception_handler_bci_for(
1322 current_mh, eh_klass, current_bci, THREAD);
1323 if (HAS_PENDING_EXCEPTION) {
1324 exception_handle = Handle(thread, PENDING_EXCEPTION);
1325 CLEAR_PENDING_EXCEPTION;
1326 should_repeat = true;
1327 }
1328 } while (should_repeat && (current_bci != -1));
1329 st.next();
1330 } while ((current_bci < 0) && (!st.at_end()));
1332 jmethodID catch_jmethodID;
1333 if (current_bci < 0) {
1334 catch_jmethodID = 0;
1335 current_bci = 0;
1336 } else {
1337 catch_jmethodID = jem.to_jmethodID(current_mh);
1338 }
1340 JvmtiJavaThreadEventTransition jet(thread);
1341 jvmtiEventException callback = env->callbacks()->Exception;
1342 if (callback != NULL) {
1343 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1344 jem.jni_methodID(), jem.location(),
1345 jem.exception(),
1346 catch_jmethodID, current_bci);
1347 }
1348 }
1349 }
1350 }
1352 // frames may get popped because of this throw, be safe - invalidate cached depth
1353 state->invalidate_cur_stack_depth();
1354 }
1357 void JvmtiExport::notice_unwind_due_to_exception(JavaThread *thread, Method* method, address location, oop exception, bool in_handler_frame) {
1358 HandleMark hm(thread);
1359 methodHandle mh(thread, method);
1360 Handle exception_handle(thread, exception);
1362 JvmtiThreadState *state = thread->jvmti_thread_state();
1363 if (state == NULL) {
1364 return;
1365 }
1366 EVT_TRIG_TRACE(JVMTI_EVENT_EXCEPTION_CATCH,
1367 ("JVMTI [%s] Trg unwind_due_to_exception triggered %s.%s @ %s%d - %s",
1368 JvmtiTrace::safe_get_thread_name(thread),
1369 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1370 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1371 location==0? "no location:" : "",
1372 location==0? 0 : location - mh()->code_base(),
1373 in_handler_frame? "in handler frame" : "not handler frame" ));
1375 if (state->is_exception_detected()) {
1377 state->invalidate_cur_stack_depth();
1378 if (!in_handler_frame) {
1379 // Not in exception handler.
1380 if(state->is_interp_only_mode()) {
1381 // method exit and frame pop events are posted only in interp mode.
1382 // When these events are enabled code should be in running in interp mode.
1383 JvmtiExport::post_method_exit(thread, method, thread->last_frame());
1384 // The cached cur_stack_depth might have changed from the
1385 // operations of frame pop or method exit. We are not 100% sure
1386 // the cached cur_stack_depth is still valid depth so invalidate
1387 // it.
1388 state->invalidate_cur_stack_depth();
1389 }
1390 } else {
1391 // In exception handler frame. Report exception catch.
1392 assert(location != NULL, "must be a known location");
1393 // Update cur_stack_depth - the frames above the current frame
1394 // have been unwound due to this exception:
1395 assert(!state->is_exception_caught(), "exception must not be caught yet.");
1396 state->set_exception_caught();
1398 JvmtiEnvThreadStateIterator it(state);
1399 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1400 if (ets->is_enabled(JVMTI_EVENT_EXCEPTION_CATCH) && (exception_handle() != NULL)) {
1401 EVT_TRACE(JVMTI_EVENT_EXCEPTION_CATCH,
1402 ("JVMTI [%s] Evt ExceptionCatch sent %s.%s @ %d",
1403 JvmtiTrace::safe_get_thread_name(thread),
1404 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1405 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1406 location - mh()->code_base() ));
1408 JvmtiEnv *env = ets->get_env();
1409 JvmtiExceptionEventMark jem(thread, mh, location, exception_handle);
1410 JvmtiJavaThreadEventTransition jet(thread);
1411 jvmtiEventExceptionCatch callback = env->callbacks()->ExceptionCatch;
1412 if (callback != NULL) {
1413 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1414 jem.jni_methodID(), jem.location(),
1415 jem.exception());
1416 }
1417 }
1418 }
1419 }
1420 }
1421 }
1423 oop JvmtiExport::jni_GetField_probe(JavaThread *thread, jobject jobj, oop obj,
1424 Klass* klass, jfieldID fieldID, bool is_static) {
1425 if (*((int *)get_field_access_count_addr()) > 0 && thread->has_last_Java_frame()) {
1426 // At least one field access watch is set so we have more work
1427 // to do. This wrapper is used by entry points that allow us
1428 // to create handles in post_field_access_by_jni().
1429 post_field_access_by_jni(thread, obj, klass, fieldID, is_static);
1430 // event posting can block so refetch oop if we were passed a jobj
1431 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj);
1432 }
1433 return obj;
1434 }
1436 oop JvmtiExport::jni_GetField_probe_nh(JavaThread *thread, jobject jobj, oop obj,
1437 Klass* klass, jfieldID fieldID, bool is_static) {
1438 if (*((int *)get_field_access_count_addr()) > 0 && thread->has_last_Java_frame()) {
1439 // At least one field access watch is set so we have more work
1440 // to do. This wrapper is used by "quick" entry points that don't
1441 // allow us to create handles in post_field_access_by_jni(). We
1442 // override that with a ResetNoHandleMark.
1443 ResetNoHandleMark rnhm;
1444 post_field_access_by_jni(thread, obj, klass, fieldID, is_static);
1445 // event posting can block so refetch oop if we were passed a jobj
1446 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj);
1447 }
1448 return obj;
1449 }
1451 void JvmtiExport::post_field_access_by_jni(JavaThread *thread, oop obj,
1452 Klass* klass, jfieldID fieldID, bool is_static) {
1453 // We must be called with a Java context in order to provide reasonable
1454 // values for the klazz, method, and location fields. The callers of this
1455 // function don't make the call unless there is a Java context.
1456 assert(thread->has_last_Java_frame(), "must be called with a Java context");
1458 ResourceMark rm;
1459 fieldDescriptor fd;
1460 // if get_field_descriptor finds fieldID to be invalid, then we just bail
1461 bool valid_fieldID = JvmtiEnv::get_field_descriptor(klass, fieldID, &fd);
1462 assert(valid_fieldID == true,"post_field_access_by_jni called with invalid fieldID");
1463 if (!valid_fieldID) return;
1464 // field accesses are not watched so bail
1465 if (!fd.is_field_access_watched()) return;
1467 HandleMark hm(thread);
1468 KlassHandle h_klass(thread, klass);
1469 Handle h_obj;
1470 if (!is_static) {
1471 // non-static field accessors have an object, but we need a handle
1472 assert(obj != NULL, "non-static needs an object");
1473 h_obj = Handle(thread, obj);
1474 }
1475 post_field_access(thread,
1476 thread->last_frame().interpreter_frame_method(),
1477 thread->last_frame().interpreter_frame_bcp(),
1478 h_klass, h_obj, fieldID);
1479 }
1481 void JvmtiExport::post_field_access(JavaThread *thread, Method* method,
1482 address location, KlassHandle field_klass, Handle object, jfieldID field) {
1484 HandleMark hm(thread);
1485 methodHandle mh(thread, method);
1487 JvmtiThreadState *state = thread->jvmti_thread_state();
1488 if (state == NULL) {
1489 return;
1490 }
1491 EVT_TRIG_TRACE(JVMTI_EVENT_FIELD_ACCESS, ("JVMTI [%s] Trg Field Access event triggered",
1492 JvmtiTrace::safe_get_thread_name(thread)));
1493 JvmtiEnvThreadStateIterator it(state);
1494 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1495 if (ets->is_enabled(JVMTI_EVENT_FIELD_ACCESS)) {
1496 EVT_TRACE(JVMTI_EVENT_FIELD_ACCESS, ("JVMTI [%s] Evt Field Access event sent %s.%s @ %d",
1497 JvmtiTrace::safe_get_thread_name(thread),
1498 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1499 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1500 location - mh()->code_base() ));
1502 JvmtiEnv *env = ets->get_env();
1503 JvmtiLocationEventMark jem(thread, mh, location);
1504 jclass field_jclass = jem.to_jclass(field_klass());
1505 jobject field_jobject = jem.to_jobject(object());
1506 JvmtiJavaThreadEventTransition jet(thread);
1507 jvmtiEventFieldAccess callback = env->callbacks()->FieldAccess;
1508 if (callback != NULL) {
1509 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1510 jem.jni_methodID(), jem.location(),
1511 field_jclass, field_jobject, field);
1512 }
1513 }
1514 }
1515 }
1517 oop JvmtiExport::jni_SetField_probe(JavaThread *thread, jobject jobj, oop obj,
1518 Klass* klass, jfieldID fieldID, bool is_static,
1519 char sig_type, jvalue *value) {
1520 if (*((int *)get_field_modification_count_addr()) > 0 && thread->has_last_Java_frame()) {
1521 // At least one field modification watch is set so we have more work
1522 // to do. This wrapper is used by entry points that allow us
1523 // to create handles in post_field_modification_by_jni().
1524 post_field_modification_by_jni(thread, obj, klass, fieldID, is_static, sig_type, value);
1525 // event posting can block so refetch oop if we were passed a jobj
1526 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj);
1527 }
1528 return obj;
1529 }
1531 oop JvmtiExport::jni_SetField_probe_nh(JavaThread *thread, jobject jobj, oop obj,
1532 Klass* klass, jfieldID fieldID, bool is_static,
1533 char sig_type, jvalue *value) {
1534 if (*((int *)get_field_modification_count_addr()) > 0 && thread->has_last_Java_frame()) {
1535 // At least one field modification watch is set so we have more work
1536 // to do. This wrapper is used by "quick" entry points that don't
1537 // allow us to create handles in post_field_modification_by_jni(). We
1538 // override that with a ResetNoHandleMark.
1539 ResetNoHandleMark rnhm;
1540 post_field_modification_by_jni(thread, obj, klass, fieldID, is_static, sig_type, value);
1541 // event posting can block so refetch oop if we were passed a jobj
1542 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj);
1543 }
1544 return obj;
1545 }
1547 void JvmtiExport::post_field_modification_by_jni(JavaThread *thread, oop obj,
1548 Klass* klass, jfieldID fieldID, bool is_static,
1549 char sig_type, jvalue *value) {
1550 // We must be called with a Java context in order to provide reasonable
1551 // values for the klazz, method, and location fields. The callers of this
1552 // function don't make the call unless there is a Java context.
1553 assert(thread->has_last_Java_frame(), "must be called with Java context");
1555 ResourceMark rm;
1556 fieldDescriptor fd;
1557 // if get_field_descriptor finds fieldID to be invalid, then we just bail
1558 bool valid_fieldID = JvmtiEnv::get_field_descriptor(klass, fieldID, &fd);
1559 assert(valid_fieldID == true,"post_field_modification_by_jni called with invalid fieldID");
1560 if (!valid_fieldID) return;
1561 // field modifications are not watched so bail
1562 if (!fd.is_field_modification_watched()) return;
1564 HandleMark hm(thread);
1566 Handle h_obj;
1567 if (!is_static) {
1568 // non-static field accessors have an object, but we need a handle
1569 assert(obj != NULL, "non-static needs an object");
1570 h_obj = Handle(thread, obj);
1571 }
1572 KlassHandle h_klass(thread, klass);
1573 post_field_modification(thread,
1574 thread->last_frame().interpreter_frame_method(),
1575 thread->last_frame().interpreter_frame_bcp(),
1576 h_klass, h_obj, fieldID, sig_type, value);
1577 }
1579 void JvmtiExport::post_raw_field_modification(JavaThread *thread, Method* method,
1580 address location, KlassHandle field_klass, Handle object, jfieldID field,
1581 char sig_type, jvalue *value) {
1583 if (sig_type == 'I' || sig_type == 'Z' || sig_type == 'C' || sig_type == 'S') {
1584 // 'I' instructions are used for byte, char, short and int.
1585 // determine which it really is, and convert
1586 fieldDescriptor fd;
1587 bool found = JvmtiEnv::get_field_descriptor(field_klass(), field, &fd);
1588 // should be found (if not, leave as is)
1589 if (found) {
1590 jint ival = value->i;
1591 // convert value from int to appropriate type
1592 switch (fd.field_type()) {
1593 case T_BOOLEAN:
1594 sig_type = 'Z';
1595 value->i = 0; // clear it
1596 value->z = (jboolean)ival;
1597 break;
1598 case T_BYTE:
1599 sig_type = 'B';
1600 value->i = 0; // clear it
1601 value->b = (jbyte)ival;
1602 break;
1603 case T_CHAR:
1604 sig_type = 'C';
1605 value->i = 0; // clear it
1606 value->c = (jchar)ival;
1607 break;
1608 case T_SHORT:
1609 sig_type = 'S';
1610 value->i = 0; // clear it
1611 value->s = (jshort)ival;
1612 break;
1613 case T_INT:
1614 // nothing to do
1615 break;
1616 default:
1617 // this is an integer instruction, should be one of above
1618 ShouldNotReachHere();
1619 break;
1620 }
1621 }
1622 }
1624 // convert oop to JNI handle.
1625 if (sig_type == 'L' || sig_type == '[') {
1626 value->l = (jobject)JNIHandles::make_local(thread, (oop)value->l);
1627 }
1629 post_field_modification(thread, method, location, field_klass, object, field, sig_type, value);
1631 // Destroy the JNI handle allocated above.
1632 if (sig_type == 'L') {
1633 JNIHandles::destroy_local(value->l);
1634 }
1635 }
1637 void JvmtiExport::post_field_modification(JavaThread *thread, Method* method,
1638 address location, KlassHandle field_klass, Handle object, jfieldID field,
1639 char sig_type, jvalue *value_ptr) {
1641 HandleMark hm(thread);
1642 methodHandle mh(thread, method);
1644 JvmtiThreadState *state = thread->jvmti_thread_state();
1645 if (state == NULL) {
1646 return;
1647 }
1648 EVT_TRIG_TRACE(JVMTI_EVENT_FIELD_MODIFICATION,
1649 ("JVMTI [%s] Trg Field Modification event triggered",
1650 JvmtiTrace::safe_get_thread_name(thread)));
1652 JvmtiEnvThreadStateIterator it(state);
1653 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1654 if (ets->is_enabled(JVMTI_EVENT_FIELD_MODIFICATION)) {
1655 EVT_TRACE(JVMTI_EVENT_FIELD_MODIFICATION,
1656 ("JVMTI [%s] Evt Field Modification event sent %s.%s @ %d",
1657 JvmtiTrace::safe_get_thread_name(thread),
1658 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1659 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1660 location - mh()->code_base() ));
1662 JvmtiEnv *env = ets->get_env();
1663 JvmtiLocationEventMark jem(thread, mh, location);
1664 jclass field_jclass = jem.to_jclass(field_klass());
1665 jobject field_jobject = jem.to_jobject(object());
1666 JvmtiJavaThreadEventTransition jet(thread);
1667 jvmtiEventFieldModification callback = env->callbacks()->FieldModification;
1668 if (callback != NULL) {
1669 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1670 jem.jni_methodID(), jem.location(),
1671 field_jclass, field_jobject, field, sig_type, *value_ptr);
1672 }
1673 }
1674 }
1675 }
1677 void JvmtiExport::post_native_method_bind(Method* method, address* function_ptr) {
1678 JavaThread* thread = JavaThread::current();
1679 assert(thread->thread_state() == _thread_in_vm, "must be in vm state");
1681 HandleMark hm(thread);
1682 methodHandle mh(thread, method);
1684 EVT_TRIG_TRACE(JVMTI_EVENT_NATIVE_METHOD_BIND, ("JVMTI [%s] Trg Native Method Bind event triggered",
1685 JvmtiTrace::safe_get_thread_name(thread)));
1687 if (JvmtiEventController::is_enabled(JVMTI_EVENT_NATIVE_METHOD_BIND)) {
1688 JvmtiEnvIterator it;
1689 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1690 if (env->is_enabled(JVMTI_EVENT_NATIVE_METHOD_BIND)) {
1691 EVT_TRACE(JVMTI_EVENT_NATIVE_METHOD_BIND, ("JVMTI [%s] Evt Native Method Bind event sent",
1692 JvmtiTrace::safe_get_thread_name(thread) ));
1694 JvmtiMethodEventMark jem(thread, mh);
1695 JvmtiJavaThreadEventTransition jet(thread);
1696 JNIEnv* jni_env = JvmtiEnv::get_phase() == JVMTI_PHASE_PRIMORDIAL? NULL : jem.jni_env();
1697 jvmtiEventNativeMethodBind callback = env->callbacks()->NativeMethodBind;
1698 if (callback != NULL) {
1699 (*callback)(env->jvmti_external(), jni_env, jem.jni_thread(),
1700 jem.jni_methodID(), (void*)(*function_ptr), (void**)function_ptr);
1701 }
1702 }
1703 }
1704 }
1705 }
1707 // Returns a record containing inlining information for the given nmethod
1708 jvmtiCompiledMethodLoadInlineRecord* create_inline_record(nmethod* nm) {
1709 jint numstackframes = 0;
1710 jvmtiCompiledMethodLoadInlineRecord* record = (jvmtiCompiledMethodLoadInlineRecord*)NEW_RESOURCE_OBJ(jvmtiCompiledMethodLoadInlineRecord);
1711 record->header.kind = JVMTI_CMLR_INLINE_INFO;
1712 record->header.next = NULL;
1713 record->header.majorinfoversion = JVMTI_CMLR_MAJOR_VERSION_1;
1714 record->header.minorinfoversion = JVMTI_CMLR_MINOR_VERSION_0;
1715 record->numpcs = 0;
1716 for(PcDesc* p = nm->scopes_pcs_begin(); p < nm->scopes_pcs_end(); p++) {
1717 if(p->scope_decode_offset() == DebugInformationRecorder::serialized_null) continue;
1718 record->numpcs++;
1719 }
1720 record->pcinfo = (PCStackInfo*)(NEW_RESOURCE_ARRAY(PCStackInfo, record->numpcs));
1721 int scope = 0;
1722 for(PcDesc* p = nm->scopes_pcs_begin(); p < nm->scopes_pcs_end(); p++) {
1723 if(p->scope_decode_offset() == DebugInformationRecorder::serialized_null) continue;
1724 void* pc_address = (void*)p->real_pc(nm);
1725 assert(pc_address != NULL, "pc_address must be non-null");
1726 record->pcinfo[scope].pc = pc_address;
1727 numstackframes=0;
1728 for(ScopeDesc* sd = nm->scope_desc_at(p->real_pc(nm));sd != NULL;sd = sd->sender()) {
1729 numstackframes++;
1730 }
1731 assert(numstackframes != 0, "numstackframes must be nonzero.");
1732 record->pcinfo[scope].methods = (jmethodID *)NEW_RESOURCE_ARRAY(jmethodID, numstackframes);
1733 record->pcinfo[scope].bcis = (jint *)NEW_RESOURCE_ARRAY(jint, numstackframes);
1734 record->pcinfo[scope].numstackframes = numstackframes;
1735 int stackframe = 0;
1736 for(ScopeDesc* sd = nm->scope_desc_at(p->real_pc(nm));sd != NULL;sd = sd->sender()) {
1737 // 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()
1738 assert(sd->method() != NULL, "sd->method() cannot be null.");
1739 record->pcinfo[scope].methods[stackframe] = sd->method()->jmethod_id();
1740 record->pcinfo[scope].bcis[stackframe] = sd->bci();
1741 stackframe++;
1742 }
1743 scope++;
1744 }
1745 return record;
1746 }
1748 void JvmtiExport::post_compiled_method_load(nmethod *nm) {
1749 JavaThread* thread = JavaThread::current();
1751 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
1752 ("JVMTI [%s] method compile load event triggered",
1753 JvmtiTrace::safe_get_thread_name(thread)));
1755 JvmtiEnvIterator it;
1756 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1757 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_LOAD)) {
1759 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
1760 ("JVMTI [%s] class compile method load event sent %s.%s ",
1761 JvmtiTrace::safe_get_thread_name(thread),
1762 (nm->method() == NULL) ? "NULL" : nm->method()->klass_name()->as_C_string(),
1763 (nm->method() == NULL) ? "NULL" : nm->method()->name()->as_C_string()));
1764 ResourceMark rm(thread);
1765 HandleMark hm(thread);
1767 // Add inlining information
1768 jvmtiCompiledMethodLoadInlineRecord* inlinerecord = create_inline_record(nm);
1769 // Pass inlining information through the void pointer
1770 JvmtiCompiledMethodLoadEventMark jem(thread, nm, inlinerecord);
1771 JvmtiJavaThreadEventTransition jet(thread);
1772 jvmtiEventCompiledMethodLoad callback = env->callbacks()->CompiledMethodLoad;
1773 if (callback != NULL) {
1774 (*callback)(env->jvmti_external(), jem.jni_methodID(),
1775 jem.code_size(), jem.code_data(), jem.map_length(),
1776 jem.map(), jem.compile_info());
1777 }
1778 }
1779 }
1780 }
1783 // post a COMPILED_METHOD_LOAD event for a given environment
1784 void JvmtiExport::post_compiled_method_load(JvmtiEnv* env, const jmethodID method, const jint length,
1785 const void *code_begin, const jint map_length,
1786 const jvmtiAddrLocationMap* map)
1787 {
1788 JavaThread* thread = JavaThread::current();
1789 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
1790 ("JVMTI [%s] method compile load event triggered (by GenerateEvents)",
1791 JvmtiTrace::safe_get_thread_name(thread)));
1792 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_LOAD)) {
1794 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
1795 ("JVMTI [%s] class compile method load event sent (by GenerateEvents), jmethodID=" PTR_FORMAT,
1796 JvmtiTrace::safe_get_thread_name(thread), method));
1798 JvmtiEventMark jem(thread);
1799 JvmtiJavaThreadEventTransition jet(thread);
1800 jvmtiEventCompiledMethodLoad callback = env->callbacks()->CompiledMethodLoad;
1801 if (callback != NULL) {
1802 (*callback)(env->jvmti_external(), method,
1803 length, code_begin, map_length,
1804 map, NULL);
1805 }
1806 }
1807 }
1809 void JvmtiExport::post_dynamic_code_generated_internal(const char *name, const void *code_begin, const void *code_end) {
1810 assert(name != NULL && name[0] != '\0', "sanity check");
1812 JavaThread* thread = JavaThread::current();
1813 // In theory everyone coming thru here is in_vm but we need to be certain
1814 // because a callee will do a vm->native transition
1815 ThreadInVMfromUnknown __tiv;
1817 EVT_TRIG_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED,
1818 ("JVMTI [%s] method dynamic code generated event triggered",
1819 JvmtiTrace::safe_get_thread_name(thread)));
1820 JvmtiEnvIterator it;
1821 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1822 if (env->is_enabled(JVMTI_EVENT_DYNAMIC_CODE_GENERATED)) {
1823 EVT_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED,
1824 ("JVMTI [%s] dynamic code generated event sent for %s",
1825 JvmtiTrace::safe_get_thread_name(thread), name));
1826 JvmtiEventMark jem(thread);
1827 JvmtiJavaThreadEventTransition jet(thread);
1828 jint length = (jint)pointer_delta(code_end, code_begin, sizeof(char));
1829 jvmtiEventDynamicCodeGenerated callback = env->callbacks()->DynamicCodeGenerated;
1830 if (callback != NULL) {
1831 (*callback)(env->jvmti_external(), name, (void*)code_begin, length);
1832 }
1833 }
1834 }
1835 }
1837 void JvmtiExport::post_dynamic_code_generated(const char *name, const void *code_begin, const void *code_end) {
1838 jvmtiPhase phase = JvmtiEnv::get_phase();
1839 if (phase == JVMTI_PHASE_PRIMORDIAL || phase == JVMTI_PHASE_START) {
1840 post_dynamic_code_generated_internal(name, code_begin, code_end);
1841 } else {
1842 // It may not be safe to post the event from this thread. Defer all
1843 // postings to the service thread so that it can perform them in a safe
1844 // context and in-order.
1845 MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag);
1846 JvmtiDeferredEvent event = JvmtiDeferredEvent::dynamic_code_generated_event(
1847 name, code_begin, code_end);
1848 JvmtiDeferredEventQueue::enqueue(event);
1849 }
1850 }
1853 // post a DYNAMIC_CODE_GENERATED event for a given environment
1854 // used by GenerateEvents
1855 void JvmtiExport::post_dynamic_code_generated(JvmtiEnv* env, const char *name,
1856 const void *code_begin, const void *code_end)
1857 {
1858 JavaThread* thread = JavaThread::current();
1859 EVT_TRIG_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED,
1860 ("JVMTI [%s] dynamic code generated event triggered (by GenerateEvents)",
1861 JvmtiTrace::safe_get_thread_name(thread)));
1862 if (env->is_enabled(JVMTI_EVENT_DYNAMIC_CODE_GENERATED)) {
1863 EVT_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED,
1864 ("JVMTI [%s] dynamic code generated event sent for %s",
1865 JvmtiTrace::safe_get_thread_name(thread), name));
1866 JvmtiEventMark jem(thread);
1867 JvmtiJavaThreadEventTransition jet(thread);
1868 jint length = (jint)pointer_delta(code_end, code_begin, sizeof(char));
1869 jvmtiEventDynamicCodeGenerated callback = env->callbacks()->DynamicCodeGenerated;
1870 if (callback != NULL) {
1871 (*callback)(env->jvmti_external(), name, (void*)code_begin, length);
1872 }
1873 }
1874 }
1876 // post a DynamicCodeGenerated event while holding locks in the VM.
1877 void JvmtiExport::post_dynamic_code_generated_while_holding_locks(const char* name,
1878 address code_begin, address code_end)
1879 {
1880 // register the stub with the current dynamic code event collector
1881 JvmtiThreadState* state = JvmtiThreadState::state_for(JavaThread::current());
1882 // state can only be NULL if the current thread is exiting which
1883 // should not happen since we're trying to post an event
1884 guarantee(state != NULL, "attempt to register stub via an exiting thread");
1885 JvmtiDynamicCodeEventCollector* collector = state->get_dynamic_code_event_collector();
1886 guarantee(collector != NULL, "attempt to register stub without event collector");
1887 collector->register_stub(name, code_begin, code_end);
1888 }
1890 // Collect all the vm internally allocated objects which are visible to java world
1891 void JvmtiExport::record_vm_internal_object_allocation(oop obj) {
1892 Thread* thread = ThreadLocalStorage::thread();
1893 if (thread != NULL && thread->is_Java_thread()) {
1894 // Can not take safepoint here.
1895 No_Safepoint_Verifier no_sfpt;
1896 // Can not take safepoint here so can not use state_for to get
1897 // jvmti thread state.
1898 JvmtiThreadState *state = ((JavaThread*)thread)->jvmti_thread_state();
1899 if (state != NULL ) {
1900 // state is non NULL when VMObjectAllocEventCollector is enabled.
1901 JvmtiVMObjectAllocEventCollector *collector;
1902 collector = state->get_vm_object_alloc_event_collector();
1903 if (collector != NULL && collector->is_enabled()) {
1904 // Don't record classes as these will be notified via the ClassLoad
1905 // event.
1906 if (obj->klass() != SystemDictionary::Class_klass()) {
1907 collector->record_allocation(obj);
1908 }
1909 }
1910 }
1911 }
1912 }
1914 void JvmtiExport::post_garbage_collection_finish() {
1915 Thread *thread = Thread::current(); // this event is posted from VM-Thread.
1916 EVT_TRIG_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH,
1917 ("JVMTI [%s] garbage collection finish event triggered",
1918 JvmtiTrace::safe_get_thread_name(thread)));
1919 JvmtiEnvIterator it;
1920 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1921 if (env->is_enabled(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH)) {
1922 EVT_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH,
1923 ("JVMTI [%s] garbage collection finish event sent ",
1924 JvmtiTrace::safe_get_thread_name(thread)));
1925 JvmtiThreadEventTransition jet(thread);
1926 // JNIEnv is NULL here because this event is posted from VM Thread
1927 jvmtiEventGarbageCollectionFinish callback = env->callbacks()->GarbageCollectionFinish;
1928 if (callback != NULL) {
1929 (*callback)(env->jvmti_external());
1930 }
1931 }
1932 }
1933 }
1935 void JvmtiExport::post_garbage_collection_start() {
1936 Thread* thread = Thread::current(); // this event is posted from vm-thread.
1937 EVT_TRIG_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_START,
1938 ("JVMTI [%s] garbage collection start event triggered",
1939 JvmtiTrace::safe_get_thread_name(thread)));
1940 JvmtiEnvIterator it;
1941 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1942 if (env->is_enabled(JVMTI_EVENT_GARBAGE_COLLECTION_START)) {
1943 EVT_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_START,
1944 ("JVMTI [%s] garbage collection start event sent ",
1945 JvmtiTrace::safe_get_thread_name(thread)));
1946 JvmtiThreadEventTransition jet(thread);
1947 // JNIEnv is NULL here because this event is posted from VM Thread
1948 jvmtiEventGarbageCollectionStart callback = env->callbacks()->GarbageCollectionStart;
1949 if (callback != NULL) {
1950 (*callback)(env->jvmti_external());
1951 }
1952 }
1953 }
1954 }
1956 void JvmtiExport::post_data_dump() {
1957 Thread *thread = Thread::current();
1958 EVT_TRIG_TRACE(JVMTI_EVENT_DATA_DUMP_REQUEST,
1959 ("JVMTI [%s] data dump request event triggered",
1960 JvmtiTrace::safe_get_thread_name(thread)));
1961 JvmtiEnvIterator it;
1962 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1963 if (env->is_enabled(JVMTI_EVENT_DATA_DUMP_REQUEST)) {
1964 EVT_TRACE(JVMTI_EVENT_DATA_DUMP_REQUEST,
1965 ("JVMTI [%s] data dump request event sent ",
1966 JvmtiTrace::safe_get_thread_name(thread)));
1967 JvmtiThreadEventTransition jet(thread);
1968 // JNIEnv is NULL here because this event is posted from VM Thread
1969 jvmtiEventDataDumpRequest callback = env->callbacks()->DataDumpRequest;
1970 if (callback != NULL) {
1971 (*callback)(env->jvmti_external());
1972 }
1973 }
1974 }
1975 }
1977 void JvmtiExport::post_monitor_contended_enter(JavaThread *thread, ObjectMonitor *obj_mntr) {
1978 oop object = (oop)obj_mntr->object();
1979 if (!ServiceUtil::visible_oop(object)) {
1980 // Ignore monitor contended enter for vm internal object.
1981 return;
1982 }
1983 JvmtiThreadState *state = thread->jvmti_thread_state();
1984 if (state == NULL) {
1985 return;
1986 }
1988 HandleMark hm(thread);
1989 Handle h(thread, object);
1991 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTER,
1992 ("JVMTI [%s] montior contended enter event triggered",
1993 JvmtiTrace::safe_get_thread_name(thread)));
1995 JvmtiEnvThreadStateIterator it(state);
1996 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1997 if (ets->is_enabled(JVMTI_EVENT_MONITOR_CONTENDED_ENTER)) {
1998 EVT_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTER,
1999 ("JVMTI [%s] monitor contended enter event sent",
2000 JvmtiTrace::safe_get_thread_name(thread)));
2001 JvmtiMonitorEventMark jem(thread, h());
2002 JvmtiEnv *env = ets->get_env();
2003 JvmtiThreadEventTransition jet(thread);
2004 jvmtiEventMonitorContendedEnter callback = env->callbacks()->MonitorContendedEnter;
2005 if (callback != NULL) {
2006 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_object());
2007 }
2008 }
2009 }
2010 }
2012 void JvmtiExport::post_monitor_contended_entered(JavaThread *thread, ObjectMonitor *obj_mntr) {
2013 oop object = (oop)obj_mntr->object();
2014 if (!ServiceUtil::visible_oop(object)) {
2015 // Ignore monitor contended entered for vm internal object.
2016 return;
2017 }
2018 JvmtiThreadState *state = thread->jvmti_thread_state();
2019 if (state == NULL) {
2020 return;
2021 }
2023 HandleMark hm(thread);
2024 Handle h(thread, object);
2026 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED,
2027 ("JVMTI [%s] montior contended entered event triggered",
2028 JvmtiTrace::safe_get_thread_name(thread)));
2030 JvmtiEnvThreadStateIterator it(state);
2031 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
2032 if (ets->is_enabled(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED)) {
2033 EVT_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED,
2034 ("JVMTI [%s] monitor contended enter event sent",
2035 JvmtiTrace::safe_get_thread_name(thread)));
2036 JvmtiMonitorEventMark jem(thread, h());
2037 JvmtiEnv *env = ets->get_env();
2038 JvmtiThreadEventTransition jet(thread);
2039 jvmtiEventMonitorContendedEntered callback = env->callbacks()->MonitorContendedEntered;
2040 if (callback != NULL) {
2041 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_object());
2042 }
2043 }
2044 }
2045 }
2047 void JvmtiExport::post_monitor_wait(JavaThread *thread, oop object,
2048 jlong timeout) {
2049 JvmtiThreadState *state = thread->jvmti_thread_state();
2050 if (state == NULL) {
2051 return;
2052 }
2054 HandleMark hm(thread);
2055 Handle h(thread, object);
2057 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_WAIT,
2058 ("JVMTI [%s] montior wait event triggered",
2059 JvmtiTrace::safe_get_thread_name(thread)));
2061 JvmtiEnvThreadStateIterator it(state);
2062 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
2063 if (ets->is_enabled(JVMTI_EVENT_MONITOR_WAIT)) {
2064 EVT_TRACE(JVMTI_EVENT_MONITOR_WAIT,
2065 ("JVMTI [%s] monitor wait event sent ",
2066 JvmtiTrace::safe_get_thread_name(thread)));
2067 JvmtiMonitorEventMark jem(thread, h());
2068 JvmtiEnv *env = ets->get_env();
2069 JvmtiThreadEventTransition jet(thread);
2070 jvmtiEventMonitorWait callback = env->callbacks()->MonitorWait;
2071 if (callback != NULL) {
2072 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
2073 jem.jni_object(), timeout);
2074 }
2075 }
2076 }
2077 }
2079 void JvmtiExport::post_monitor_waited(JavaThread *thread, ObjectMonitor *obj_mntr, jboolean timed_out) {
2080 oop object = (oop)obj_mntr->object();
2081 if (!ServiceUtil::visible_oop(object)) {
2082 // Ignore monitor waited for vm internal object.
2083 return;
2084 }
2085 JvmtiThreadState *state = thread->jvmti_thread_state();
2086 if (state == NULL) {
2087 return;
2088 }
2090 HandleMark hm(thread);
2091 Handle h(thread, object);
2093 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_WAITED,
2094 ("JVMTI [%s] montior waited event triggered",
2095 JvmtiTrace::safe_get_thread_name(thread)));
2097 JvmtiEnvThreadStateIterator it(state);
2098 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
2099 if (ets->is_enabled(JVMTI_EVENT_MONITOR_WAITED)) {
2100 EVT_TRACE(JVMTI_EVENT_MONITOR_WAITED,
2101 ("JVMTI [%s] monitor waited event sent ",
2102 JvmtiTrace::safe_get_thread_name(thread)));
2103 JvmtiMonitorEventMark jem(thread, h());
2104 JvmtiEnv *env = ets->get_env();
2105 JvmtiThreadEventTransition jet(thread);
2106 jvmtiEventMonitorWaited callback = env->callbacks()->MonitorWaited;
2107 if (callback != NULL) {
2108 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
2109 jem.jni_object(), timed_out);
2110 }
2111 }
2112 }
2113 }
2116 void JvmtiExport::post_vm_object_alloc(JavaThread *thread, oop object) {
2117 EVT_TRIG_TRACE(JVMTI_EVENT_VM_OBJECT_ALLOC, ("JVMTI [%s] Trg vm object alloc triggered",
2118 JvmtiTrace::safe_get_thread_name(thread)));
2119 if (object == NULL) {
2120 return;
2121 }
2122 HandleMark hm(thread);
2123 Handle h(thread, object);
2124 JvmtiEnvIterator it;
2125 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
2126 if (env->is_enabled(JVMTI_EVENT_VM_OBJECT_ALLOC)) {
2127 EVT_TRACE(JVMTI_EVENT_VM_OBJECT_ALLOC, ("JVMTI [%s] Evt vmobject alloc sent %s",
2128 JvmtiTrace::safe_get_thread_name(thread),
2129 object==NULL? "NULL" : java_lang_Class::as_Klass(object)->external_name()));
2131 JvmtiVMObjectAllocEventMark jem(thread, h());
2132 JvmtiJavaThreadEventTransition jet(thread);
2133 jvmtiEventVMObjectAlloc callback = env->callbacks()->VMObjectAlloc;
2134 if (callback != NULL) {
2135 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
2136 jem.jni_jobject(), jem.jni_class(), jem.size());
2137 }
2138 }
2139 }
2140 }
2142 ////////////////////////////////////////////////////////////////////////////////////////////////
2144 void JvmtiExport::cleanup_thread(JavaThread* thread) {
2145 assert(JavaThread::current() == thread, "thread is not current");
2146 MutexLocker mu(JvmtiThreadState_lock);
2148 if (thread->jvmti_thread_state() != NULL) {
2149 // This has to happen after the thread state is removed, which is
2150 // why it is not in post_thread_end_event like its complement
2151 // Maybe both these functions should be rolled into the posts?
2152 JvmtiEventController::thread_ended(thread);
2153 }
2154 }
2156 void JvmtiExport::oops_do(OopClosure* f) {
2157 JvmtiCurrentBreakpoints::oops_do(f);
2158 JvmtiVMObjectAllocEventCollector::oops_do_for_all_threads(f);
2159 }
2161 void JvmtiExport::weak_oops_do(BoolObjectClosure* is_alive, OopClosure* f) {
2162 JvmtiTagMap::weak_oops_do(is_alive, f);
2163 }
2165 void JvmtiExport::gc_epilogue() {
2166 JvmtiCurrentBreakpoints::gc_epilogue();
2167 }
2169 // Onload raw monitor transition.
2170 void JvmtiExport::transition_pending_onload_raw_monitors() {
2171 JvmtiPendingMonitors::transition_raw_monitors();
2172 }
2174 ////////////////////////////////////////////////////////////////////////////////////////////////
2176 // type for the Agent_OnAttach entry point
2177 extern "C" {
2178 typedef jint (JNICALL *OnAttachEntry_t)(JavaVM*, char *, void *);
2179 }
2181 jint JvmtiExport::load_agent_library(AttachOperation* op, outputStream* st) {
2182 char ebuf[1024];
2183 char buffer[JVM_MAXPATHLEN];
2184 void* library = NULL;
2185 jint result = JNI_ERR;
2187 // get agent name and options
2188 const char* agent = op->arg(0);
2189 const char* absParam = op->arg(1);
2190 const char* options = op->arg(2);
2192 // The abs paramter should be "true" or "false"
2193 bool is_absolute_path = (absParam != NULL) && (strcmp(absParam,"true")==0);
2196 // If the path is absolute we attempt to load the library. Otherwise we try to
2197 // load it from the standard dll directory.
2199 if (is_absolute_path) {
2200 library = os::dll_load(agent, ebuf, sizeof ebuf);
2201 } else {
2202 // Try to load the agent from the standard dll directory
2203 if (os::dll_build_name(buffer, sizeof(buffer), Arguments::get_dll_dir(),
2204 agent)) {
2205 library = os::dll_load(buffer, ebuf, sizeof ebuf);
2206 }
2207 if (library == NULL) {
2208 // not found - try local path
2209 char ns[1] = {0};
2210 if (os::dll_build_name(buffer, sizeof(buffer), ns, agent)) {
2211 library = os::dll_load(buffer, ebuf, sizeof ebuf);
2212 }
2213 }
2214 }
2216 // If the library was loaded then we attempt to invoke the Agent_OnAttach
2217 // function
2218 if (library != NULL) {
2220 // Lookup the Agent_OnAttach function
2221 OnAttachEntry_t on_attach_entry = NULL;
2222 const char *on_attach_symbols[] = AGENT_ONATTACH_SYMBOLS;
2223 for (uint symbol_index = 0; symbol_index < ARRAY_SIZE(on_attach_symbols); symbol_index++) {
2224 on_attach_entry =
2225 CAST_TO_FN_PTR(OnAttachEntry_t, os::dll_lookup(library, on_attach_symbols[symbol_index]));
2226 if (on_attach_entry != NULL) break;
2227 }
2229 if (on_attach_entry == NULL) {
2230 // Agent_OnAttach missing - unload library
2231 os::dll_unload(library);
2232 } else {
2233 // Invoke the Agent_OnAttach function
2234 JavaThread* THREAD = JavaThread::current();
2235 {
2236 extern struct JavaVM_ main_vm;
2237 JvmtiThreadEventMark jem(THREAD);
2238 JvmtiJavaThreadEventTransition jet(THREAD);
2240 result = (*on_attach_entry)(&main_vm, (char*)options, NULL);
2241 }
2243 // Agent_OnAttach may have used JNI
2244 if (HAS_PENDING_EXCEPTION) {
2245 CLEAR_PENDING_EXCEPTION;
2246 }
2248 // If OnAttach returns JNI_OK then we add it to the list of
2249 // agent libraries so that we can call Agent_OnUnload later.
2250 if (result == JNI_OK) {
2251 Arguments::add_loaded_agent(agent, (char*)options, is_absolute_path, library);
2252 }
2254 // Agent_OnAttach executed so completion status is JNI_OK
2255 st->print_cr("%d", result);
2256 result = JNI_OK;
2257 }
2258 }
2259 return result;
2260 }
2262 ////////////////////////////////////////////////////////////////////////////////////////////////
2264 // Setup current current thread for event collection.
2265 void JvmtiEventCollector::setup_jvmti_thread_state() {
2266 // set this event collector to be the current one.
2267 JvmtiThreadState* state = JvmtiThreadState::state_for(JavaThread::current());
2268 // state can only be NULL if the current thread is exiting which
2269 // should not happen since we're trying to configure for event collection
2270 guarantee(state != NULL, "exiting thread called setup_jvmti_thread_state");
2271 if (is_vm_object_alloc_event()) {
2272 _prev = state->get_vm_object_alloc_event_collector();
2273 state->set_vm_object_alloc_event_collector((JvmtiVMObjectAllocEventCollector *)this);
2274 } else if (is_dynamic_code_event()) {
2275 _prev = state->get_dynamic_code_event_collector();
2276 state->set_dynamic_code_event_collector((JvmtiDynamicCodeEventCollector *)this);
2277 }
2278 }
2280 // Unset current event collection in this thread and reset it with previous
2281 // collector.
2282 void JvmtiEventCollector::unset_jvmti_thread_state() {
2283 JvmtiThreadState* state = JavaThread::current()->jvmti_thread_state();
2284 if (state != NULL) {
2285 // restore the previous event collector (if any)
2286 if (is_vm_object_alloc_event()) {
2287 if (state->get_vm_object_alloc_event_collector() == this) {
2288 state->set_vm_object_alloc_event_collector((JvmtiVMObjectAllocEventCollector *)_prev);
2289 } else {
2290 // this thread's jvmti state was created during the scope of
2291 // the event collector.
2292 }
2293 } else {
2294 if (is_dynamic_code_event()) {
2295 if (state->get_dynamic_code_event_collector() == this) {
2296 state->set_dynamic_code_event_collector((JvmtiDynamicCodeEventCollector *)_prev);
2297 } else {
2298 // this thread's jvmti state was created during the scope of
2299 // the event collector.
2300 }
2301 }
2302 }
2303 }
2304 }
2306 // create the dynamic code event collector
2307 JvmtiDynamicCodeEventCollector::JvmtiDynamicCodeEventCollector() : _code_blobs(NULL) {
2308 if (JvmtiExport::should_post_dynamic_code_generated()) {
2309 setup_jvmti_thread_state();
2310 }
2311 }
2313 // iterate over any code blob descriptors collected and post a
2314 // DYNAMIC_CODE_GENERATED event to the profiler.
2315 JvmtiDynamicCodeEventCollector::~JvmtiDynamicCodeEventCollector() {
2316 assert(!JavaThread::current()->owns_locks(), "all locks must be released to post deferred events");
2317 // iterate over any code blob descriptors that we collected
2318 if (_code_blobs != NULL) {
2319 for (int i=0; i<_code_blobs->length(); i++) {
2320 JvmtiCodeBlobDesc* blob = _code_blobs->at(i);
2321 JvmtiExport::post_dynamic_code_generated(blob->name(), blob->code_begin(), blob->code_end());
2322 FreeHeap(blob);
2323 }
2324 delete _code_blobs;
2325 }
2326 unset_jvmti_thread_state();
2327 }
2329 // register a stub
2330 void JvmtiDynamicCodeEventCollector::register_stub(const char* name, address start, address end) {
2331 if (_code_blobs == NULL) {
2332 _code_blobs = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<JvmtiCodeBlobDesc*>(1,true);
2333 }
2334 _code_blobs->append(new JvmtiCodeBlobDesc(name, start, end));
2335 }
2337 // Setup current thread to record vm allocated objects.
2338 JvmtiVMObjectAllocEventCollector::JvmtiVMObjectAllocEventCollector() : _allocated(NULL) {
2339 if (JvmtiExport::should_post_vm_object_alloc()) {
2340 _enable = true;
2341 setup_jvmti_thread_state();
2342 } else {
2343 _enable = false;
2344 }
2345 }
2347 // Post vm_object_alloc event for vm allocated objects visible to java
2348 // world.
2349 JvmtiVMObjectAllocEventCollector::~JvmtiVMObjectAllocEventCollector() {
2350 if (_allocated != NULL) {
2351 set_enabled(false);
2352 for (int i = 0; i < _allocated->length(); i++) {
2353 oop obj = _allocated->at(i);
2354 if (ServiceUtil::visible_oop(obj)) {
2355 JvmtiExport::post_vm_object_alloc(JavaThread::current(), obj);
2356 }
2357 }
2358 delete _allocated;
2359 }
2360 unset_jvmti_thread_state();
2361 }
2363 void JvmtiVMObjectAllocEventCollector::record_allocation(oop obj) {
2364 assert(is_enabled(), "VM object alloc event collector is not enabled");
2365 if (_allocated == NULL) {
2366 _allocated = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<oop>(1, true);
2367 }
2368 _allocated->push(obj);
2369 }
2371 // GC support.
2372 void JvmtiVMObjectAllocEventCollector::oops_do(OopClosure* f) {
2373 if (_allocated != NULL) {
2374 for(int i=_allocated->length() - 1; i >= 0; i--) {
2375 if (_allocated->at(i) != NULL) {
2376 f->do_oop(_allocated->adr_at(i));
2377 }
2378 }
2379 }
2380 }
2382 void JvmtiVMObjectAllocEventCollector::oops_do_for_all_threads(OopClosure* f) {
2383 // no-op if jvmti not enabled
2384 if (!JvmtiEnv::environments_might_exist()) {
2385 return;
2386 }
2388 // Runs at safepoint. So no need to acquire Threads_lock.
2389 for (JavaThread *jthr = Threads::first(); jthr != NULL; jthr = jthr->next()) {
2390 JvmtiThreadState *state = jthr->jvmti_thread_state();
2391 if (state != NULL) {
2392 JvmtiVMObjectAllocEventCollector *collector;
2393 collector = state->get_vm_object_alloc_event_collector();
2394 while (collector != NULL) {
2395 collector->oops_do(f);
2396 collector = (JvmtiVMObjectAllocEventCollector *)collector->get_prev();
2397 }
2398 }
2399 }
2400 }
2403 // Disable collection of VMObjectAlloc events
2404 NoJvmtiVMObjectAllocMark::NoJvmtiVMObjectAllocMark() : _collector(NULL) {
2405 // a no-op if VMObjectAlloc event is not enabled
2406 if (!JvmtiExport::should_post_vm_object_alloc()) {
2407 return;
2408 }
2409 Thread* thread = ThreadLocalStorage::thread();
2410 if (thread != NULL && thread->is_Java_thread()) {
2411 JavaThread* current_thread = (JavaThread*)thread;
2412 JvmtiThreadState *state = current_thread->jvmti_thread_state();
2413 if (state != NULL) {
2414 JvmtiVMObjectAllocEventCollector *collector;
2415 collector = state->get_vm_object_alloc_event_collector();
2416 if (collector != NULL && collector->is_enabled()) {
2417 _collector = collector;
2418 _collector->set_enabled(false);
2419 }
2420 }
2421 }
2422 }
2424 // Re-Enable collection of VMObjectAlloc events (if previously enabled)
2425 NoJvmtiVMObjectAllocMark::~NoJvmtiVMObjectAllocMark() {
2426 if (was_enabled()) {
2427 _collector->set_enabled(true);
2428 }
2429 };
2431 JvmtiGCMarker::JvmtiGCMarker() {
2432 // if there aren't any JVMTI environments then nothing to do
2433 if (!JvmtiEnv::environments_might_exist()) {
2434 return;
2435 }
2437 if (JvmtiExport::should_post_garbage_collection_start()) {
2438 JvmtiExport::post_garbage_collection_start();
2439 }
2441 if (SafepointSynchronize::is_at_safepoint()) {
2442 // Do clean up tasks that need to be done at a safepoint
2443 JvmtiEnvBase::check_for_periodic_clean_up();
2444 }
2445 }
2447 JvmtiGCMarker::~JvmtiGCMarker() {
2448 // if there aren't any JVMTI environments then nothing to do
2449 if (!JvmtiEnv::environments_might_exist()) {
2450 return;
2451 }
2453 // JVMTI notify gc finish
2454 if (JvmtiExport::should_post_garbage_collection_finish()) {
2455 JvmtiExport::post_garbage_collection_finish();
2456 }
2457 }
