1 /*
2 * Copyright (c) 2003, 2016, 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 */
24
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 "prims/jvmtiRedefineClasses.hpp"
45 #include "runtime/arguments.hpp"
46 #include "runtime/handles.hpp"
47 #include "runtime/interfaceSupport.hpp"
48 #include "runtime/objectMonitor.hpp"
49 #include "runtime/objectMonitor.inline.hpp"
50 #include "runtime/thread.inline.hpp"
51 #include "runtime/vframe.hpp"
52 #include "services/attachListener.hpp"
53 #include "services/serviceUtil.hpp"
54 #include "utilities/macros.hpp"
55 #if INCLUDE_ALL_GCS
56 #include "gc_implementation/parallelScavenge/psMarkSweep.hpp"
57 #endif // INCLUDE_ALL_GCS
58
59 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
60
61 #ifdef JVMTI_TRACE
62 #define EVT_TRACE(evt,out) if ((JvmtiTrace::event_trace_flags(evt) & JvmtiTrace::SHOW_EVENT_SENT) != 0) { SafeResourceMark rm; tty->print_cr out; }
63 #define EVT_TRIG_TRACE(evt,out) if ((JvmtiTrace::event_trace_flags(evt) & JvmtiTrace::SHOW_EVENT_TRIGGER) != 0) { SafeResourceMark rm; tty->print_cr out; }
64 #else
65 #define EVT_TRIG_TRACE(evt,out)
66 #define EVT_TRACE(evt,out)
67 #endif
68
69 ///////////////////////////////////////////////////////////////
70 //
71 // JvmtiEventTransition
72 //
73 // TO DO --
74 // more handle purging
75
76 // Use this for JavaThreads and state is _thread_in_vm.
77 class JvmtiJavaThreadEventTransition : StackObj {
78 private:
79 ResourceMark _rm;
80 ThreadToNativeFromVM _transition;
81 HandleMark _hm;
82
83 public:
84 JvmtiJavaThreadEventTransition(JavaThread *thread) :
85 _rm(),
86 _transition(thread),
87 _hm(thread) {};
88 };
89
90 // For JavaThreads which are not in _thread_in_vm state
91 // and other system threads use this.
92 class JvmtiThreadEventTransition : StackObj {
93 private:
94 ResourceMark _rm;
95 HandleMark _hm;
96 JavaThreadState _saved_state;
97 JavaThread *_jthread;
98
99 public:
100 JvmtiThreadEventTransition(Thread *thread) : _rm(), _hm() {
101 if (thread->is_Java_thread()) {
102 _jthread = (JavaThread *)thread;
103 _saved_state = _jthread->thread_state();
104 if (_saved_state == _thread_in_Java) {
105 ThreadStateTransition::transition_from_java(_jthread, _thread_in_native);
106 } else {
107 ThreadStateTransition::transition(_jthread, _saved_state, _thread_in_native);
108 }
109 } else {
110 _jthread = NULL;
111 }
112 }
113
114 ~JvmtiThreadEventTransition() {
115 if (_jthread != NULL)
116 ThreadStateTransition::transition_from_native(_jthread, _saved_state);
117 }
118 };
119
120
121 ///////////////////////////////////////////////////////////////
122 //
123 // JvmtiEventMark
124 //
125
126 class JvmtiEventMark : public StackObj {
127 private:
128 JavaThread *_thread;
129 JNIEnv* _jni_env;
130 bool _exception_detected;
131 bool _exception_caught;
132 #if 0
133 JNIHandleBlock* _hblock;
134 #endif
135
136 public:
137 JvmtiEventMark(JavaThread *thread) : _thread(thread),
138 _jni_env(thread->jni_environment()) {
139 #if 0
140 _hblock = thread->active_handles();
141 _hblock->clear_thoroughly(); // so we can be safe
142 #else
143 // we want to use the code above - but that needs the JNIHandle changes - later...
144 // for now, steal JNI push local frame code
145 JvmtiThreadState *state = thread->jvmti_thread_state();
146 // we are before an event.
147 // Save current jvmti thread exception state.
148 if (state != NULL) {
149 _exception_detected = state->is_exception_detected();
150 _exception_caught = state->is_exception_caught();
151 } else {
152 _exception_detected = false;
153 _exception_caught = false;
154 }
155
156 JNIHandleBlock* old_handles = thread->active_handles();
157 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread);
158 assert(new_handles != NULL, "should not be NULL");
159 new_handles->set_pop_frame_link(old_handles);
160 thread->set_active_handles(new_handles);
161 #endif
162 assert(thread == JavaThread::current(), "thread must be current!");
163 thread->frame_anchor()->make_walkable(thread);
164 };
165
166 ~JvmtiEventMark() {
167 #if 0
168 _hblock->clear(); // for consistency with future correct behavior
169 #else
170 // we want to use the code above - but that needs the JNIHandle changes - later...
171 // for now, steal JNI pop local frame code
172 JNIHandleBlock* old_handles = _thread->active_handles();
173 JNIHandleBlock* new_handles = old_handles->pop_frame_link();
174 assert(new_handles != NULL, "should not be NULL");
175 _thread->set_active_handles(new_handles);
176 // Note that we set the pop_frame_link to NULL explicitly, otherwise
177 // the release_block call will release the blocks.
178 old_handles->set_pop_frame_link(NULL);
179 JNIHandleBlock::release_block(old_handles, _thread); // may block
180 #endif
181
182 JvmtiThreadState* state = _thread->jvmti_thread_state();
183 // we are continuing after an event.
184 if (state != NULL) {
185 // Restore the jvmti thread exception state.
186 if (_exception_detected) {
187 state->set_exception_detected();
188 }
189 if (_exception_caught) {
190 state->set_exception_caught();
191 }
192 }
193 }
194
195 #if 0
196 jobject to_jobject(oop obj) { return obj == NULL? NULL : _hblock->allocate_handle_fast(obj); }
197 #else
198 // we want to use the code above - but that needs the JNIHandle changes - later...
199 // for now, use regular make_local
200 jobject to_jobject(oop obj) { return JNIHandles::make_local(_thread,obj); }
201 #endif
202
203 jclass to_jclass(Klass* klass) { return (klass == NULL ? NULL : (jclass)to_jobject(klass->java_mirror())); }
204
205 jmethodID to_jmethodID(methodHandle method) { return method->jmethod_id(); }
206
207 JNIEnv* jni_env() { return _jni_env; }
208 };
209
210 class JvmtiThreadEventMark : public JvmtiEventMark {
211 private:
212 jthread _jt;
213
214 public:
215 JvmtiThreadEventMark(JavaThread *thread) :
216 JvmtiEventMark(thread) {
217 _jt = (jthread)(to_jobject(thread->threadObj()));
218 };
219 jthread jni_thread() { return _jt; }
220 };
221
222 class JvmtiClassEventMark : public JvmtiThreadEventMark {
223 private:
224 jclass _jc;
225
226 public:
227 JvmtiClassEventMark(JavaThread *thread, Klass* klass) :
228 JvmtiThreadEventMark(thread) {
229 _jc = to_jclass(klass);
230 };
231 jclass jni_class() { return _jc; }
232 };
233
234 class JvmtiMethodEventMark : public JvmtiThreadEventMark {
235 private:
236 jmethodID _mid;
237
238 public:
239 JvmtiMethodEventMark(JavaThread *thread, methodHandle method) :
240 JvmtiThreadEventMark(thread),
241 _mid(to_jmethodID(method)) {};
242 jmethodID jni_methodID() { return _mid; }
243 };
244
245 class JvmtiLocationEventMark : public JvmtiMethodEventMark {
246 private:
247 jlocation _loc;
248
249 public:
250 JvmtiLocationEventMark(JavaThread *thread, methodHandle method, address location) :
251 JvmtiMethodEventMark(thread, method),
252 _loc(location - method->code_base()) {};
253 jlocation location() { return _loc; }
254 };
255
256 class JvmtiExceptionEventMark : public JvmtiLocationEventMark {
257 private:
258 jobject _exc;
259
260 public:
261 JvmtiExceptionEventMark(JavaThread *thread, methodHandle method, address location, Handle exception) :
262 JvmtiLocationEventMark(thread, method, location),
263 _exc(to_jobject(exception())) {};
264 jobject exception() { return _exc; }
265 };
266
267 class JvmtiClassFileLoadEventMark : public JvmtiThreadEventMark {
268 private:
269 const char *_class_name;
270 jobject _jloader;
271 jobject _protection_domain;
272 jclass _class_being_redefined;
273
274 public:
275 JvmtiClassFileLoadEventMark(JavaThread *thread, Symbol* name,
276 Handle class_loader, Handle prot_domain, KlassHandle *class_being_redefined) : JvmtiThreadEventMark(thread) {
277 _class_name = name != NULL? name->as_utf8() : NULL;
278 _jloader = (jobject)to_jobject(class_loader());
279 _protection_domain = (jobject)to_jobject(prot_domain());
280 if (class_being_redefined == NULL) {
281 _class_being_redefined = NULL;
282 } else {
283 _class_being_redefined = (jclass)to_jclass((*class_being_redefined)());
284 }
285 };
286 const char *class_name() {
287 return _class_name;
288 }
289 jobject jloader() {
290 return _jloader;
291 }
292 jobject protection_domain() {
293 return _protection_domain;
294 }
295 jclass class_being_redefined() {
296 return _class_being_redefined;
297 }
298 };
299
300 //////////////////////////////////////////////////////////////////////////////
301
302 int JvmtiExport::_field_access_count = 0;
303 int JvmtiExport::_field_modification_count = 0;
304
305 bool JvmtiExport::_can_access_local_variables = false;
306 bool JvmtiExport::_can_hotswap_or_post_breakpoint = false;
307 bool JvmtiExport::_can_modify_any_class = false;
308 bool JvmtiExport::_can_walk_any_space = false;
309
310 bool JvmtiExport::_has_redefined_a_class = false;
311 bool JvmtiExport::_all_dependencies_are_recorded = false;
312
313 //
314 // field access management
315 //
316
317 // interpreter generator needs the address of the counter
318 address JvmtiExport::get_field_access_count_addr() {
319 // We don't grab a lock because we don't want to
320 // serialize field access between all threads. This means that a
321 // thread on another processor can see the wrong count value and
322 // may either miss making a needed call into post_field_access()
323 // or will make an unneeded call into post_field_access(). We pay
324 // this price to avoid slowing down the VM when we aren't watching
325 // field accesses.
326 // Other access/mutation safe by virtue of being in VM state.
327 return (address)(&_field_access_count);
328 }
329
330 //
331 // field modification management
332 //
333
334 // interpreter generator needs the address of the counter
335 address JvmtiExport::get_field_modification_count_addr() {
336 // We don't grab a lock because we don't
337 // want to serialize field modification between all threads. This
338 // means that a thread on another processor can see the wrong
339 // count value and may either miss making a needed call into
340 // post_field_modification() or will make an unneeded call into
341 // post_field_modification(). We pay this price to avoid slowing
342 // down the VM when we aren't watching field modifications.
343 // Other access/mutation safe by virtue of being in VM state.
344 return (address)(&_field_modification_count);
345 }
346
347
348 ///////////////////////////////////////////////////////////////
349 // Functions needed by java.lang.instrument for starting up javaagent.
350 ///////////////////////////////////////////////////////////////
351
352 jint
353 JvmtiExport::get_jvmti_interface(JavaVM *jvm, void **penv, jint version) {
354 // The JVMTI_VERSION_INTERFACE_JVMTI part of the version number
355 // has already been validated in JNI GetEnv().
356 int major, minor, micro;
357
358 // micro version doesn't matter here (yet?)
359 decode_version_values(version, &major, &minor, µ);
360 switch (major) {
361 case 1:
362 switch (minor) {
363 case 0: // version 1.0.<micro> is recognized
364 case 1: // version 1.1.<micro> is recognized
365 case 2: // version 1.2.<micro> is recognized
366 break;
367
368 default:
369 return JNI_EVERSION; // unsupported minor version number
370 }
371 break;
372 default:
373 return JNI_EVERSION; // unsupported major version number
374 }
375
376 if (JvmtiEnv::get_phase() == JVMTI_PHASE_LIVE) {
377 JavaThread* current_thread = (JavaThread*) ThreadLocalStorage::thread();
378 // transition code: native to VM
379 ThreadInVMfromNative __tiv(current_thread);
380 VM_ENTRY_BASE(jvmtiEnv*, JvmtiExport::get_jvmti_interface, current_thread)
381 debug_only(VMNativeEntryWrapper __vew;)
382
383 JvmtiEnv *jvmti_env = JvmtiEnv::create_a_jvmti(version);
384 *penv = jvmti_env->jvmti_external(); // actual type is jvmtiEnv* -- not to be confused with JvmtiEnv*
385 return JNI_OK;
386
387 } else if (JvmtiEnv::get_phase() == JVMTI_PHASE_ONLOAD) {
388 // not live, no thread to transition
389 JvmtiEnv *jvmti_env = JvmtiEnv::create_a_jvmti(version);
390 *penv = jvmti_env->jvmti_external(); // actual type is jvmtiEnv* -- not to be confused with JvmtiEnv*
391 return JNI_OK;
392
393 } else {
394 // Called at the wrong time
395 *penv = NULL;
396 return JNI_EDETACHED;
397 }
398 }
399
400
401 void
402 JvmtiExport::decode_version_values(jint version, int * major, int * minor,
403 int * micro) {
404 *major = (version & JVMTI_VERSION_MASK_MAJOR) >> JVMTI_VERSION_SHIFT_MAJOR;
405 *minor = (version & JVMTI_VERSION_MASK_MINOR) >> JVMTI_VERSION_SHIFT_MINOR;
406 *micro = (version & JVMTI_VERSION_MASK_MICRO) >> JVMTI_VERSION_SHIFT_MICRO;
407 }
408
409 void JvmtiExport::enter_primordial_phase() {
410 JvmtiEnvBase::set_phase(JVMTI_PHASE_PRIMORDIAL);
411 }
412
413 void JvmtiExport::enter_start_phase() {
414 JvmtiManageCapabilities::recompute_always_capabilities();
415 JvmtiEnvBase::set_phase(JVMTI_PHASE_START);
416 }
417
418 void JvmtiExport::enter_onload_phase() {
419 JvmtiEnvBase::set_phase(JVMTI_PHASE_ONLOAD);
420 }
421
422 void JvmtiExport::enter_live_phase() {
423 JvmtiEnvBase::set_phase(JVMTI_PHASE_LIVE);
424 }
425
426 //
427 // JVMTI events that the VM posts to the debugger and also startup agent
428 // and call the agent's premain() for java.lang.instrument.
429 //
430
431 void JvmtiExport::post_vm_start() {
432 EVT_TRIG_TRACE(JVMTI_EVENT_VM_START, ("JVMTI Trg VM start event triggered" ));
433
434 // can now enable some events
435 JvmtiEventController::vm_start();
436
437 JvmtiEnvIterator it;
438 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
439 if (env->is_enabled(JVMTI_EVENT_VM_START)) {
440 EVT_TRACE(JVMTI_EVENT_VM_START, ("JVMTI Evt VM start event sent" ));
441
442 JavaThread *thread = JavaThread::current();
443 JvmtiThreadEventMark jem(thread);
444 JvmtiJavaThreadEventTransition jet(thread);
445 jvmtiEventVMStart callback = env->callbacks()->VMStart;
446 if (callback != NULL) {
447 (*callback)(env->jvmti_external(), jem.jni_env());
448 }
449 }
450 }
451 }
452
453
454 void JvmtiExport::post_vm_initialized() {
455 EVT_TRIG_TRACE(JVMTI_EVENT_VM_INIT, ("JVMTI Trg VM init event triggered" ));
456
457 // can now enable events
458 JvmtiEventController::vm_init();
459
460 JvmtiEnvIterator it;
461 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
462 if (env->is_enabled(JVMTI_EVENT_VM_INIT)) {
463 EVT_TRACE(JVMTI_EVENT_VM_INIT, ("JVMTI Evt VM init event sent" ));
464
465 JavaThread *thread = JavaThread::current();
466 JvmtiThreadEventMark jem(thread);
467 JvmtiJavaThreadEventTransition jet(thread);
468 jvmtiEventVMInit callback = env->callbacks()->VMInit;
469 if (callback != NULL) {
470 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread());
471 }
472 }
473 }
474 }
475
476
477 void JvmtiExport::post_vm_death() {
478 EVT_TRIG_TRACE(JVMTI_EVENT_VM_DEATH, ("JVMTI Trg VM death event triggered" ));
479
480 JvmtiEnvIterator it;
481 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
482 if (env->is_enabled(JVMTI_EVENT_VM_DEATH)) {
483 EVT_TRACE(JVMTI_EVENT_VM_DEATH, ("JVMTI Evt VM death event sent" ));
484
485 JavaThread *thread = JavaThread::current();
486 JvmtiEventMark jem(thread);
487 JvmtiJavaThreadEventTransition jet(thread);
488 jvmtiEventVMDeath callback = env->callbacks()->VMDeath;
489 if (callback != NULL) {
490 (*callback)(env->jvmti_external(), jem.jni_env());
491 }
492 }
493 }
494
495 JvmtiEnvBase::set_phase(JVMTI_PHASE_DEAD);
496 JvmtiEventController::vm_death();
497 }
498
499 char**
500 JvmtiExport::get_all_native_method_prefixes(int* count_ptr) {
501 // Have to grab JVMTI thread state lock to be sure environment doesn't
502 // go away while we iterate them. No locks during VM bring-up.
503 if (Threads::number_of_threads() == 0 || SafepointSynchronize::is_at_safepoint()) {
504 return JvmtiEnvBase::get_all_native_method_prefixes(count_ptr);
505 } else {
506 MutexLocker mu(JvmtiThreadState_lock);
507 return JvmtiEnvBase::get_all_native_method_prefixes(count_ptr);
508 }
509 }
510
511 class JvmtiClassFileLoadHookPoster : public StackObj {
512 private:
513 Symbol* _h_name;
514 Handle _class_loader;
515 Handle _h_protection_domain;
516 unsigned char ** _data_ptr;
517 unsigned char ** _end_ptr;
518 JavaThread * _thread;
519 jint _curr_len;
520 unsigned char * _curr_data;
521 JvmtiEnv * _curr_env;
522 JvmtiCachedClassFileData ** _cached_class_file_ptr;
523 JvmtiThreadState * _state;
524 KlassHandle * _h_class_being_redefined;
525 JvmtiClassLoadKind _load_kind;
526
527 public:
528 inline JvmtiClassFileLoadHookPoster(Symbol* h_name, Handle class_loader,
529 Handle h_protection_domain,
530 unsigned char **data_ptr, unsigned char **end_ptr,
531 JvmtiCachedClassFileData **cache_ptr) {
532 _h_name = h_name;
533 _class_loader = class_loader;
534 _h_protection_domain = h_protection_domain;
535 _data_ptr = data_ptr;
536 _end_ptr = end_ptr;
537 _thread = JavaThread::current();
538 _curr_len = *end_ptr - *data_ptr;
539 _curr_data = *data_ptr;
540 _curr_env = NULL;
541 _cached_class_file_ptr = cache_ptr;
542
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 }
559
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 }
567
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 }
592
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_class_file_ptr == NULL) {
619 // data has been changed by the new retransformable agent
620 // and it hasn't already been cached, cache it
621 JvmtiCachedClassFileData *p;
622 p = (JvmtiCachedClassFileData *)os::malloc(
623 offset_of(JvmtiCachedClassFileData, data) + _curr_len, mtInternal);
624 if (p == NULL) {
625 vm_exit_out_of_memory(offset_of(JvmtiCachedClassFileData, data) + _curr_len,
626 OOM_MALLOC_ERROR,
627 "unable to allocate cached copy of original class bytes");
628 }
629 p->length = _curr_len;
630 memcpy(p->data, _curr_data, _curr_len);
631 *_cached_class_file_ptr = p;
632 }
633
634 if (_curr_data != *_data_ptr) {
635 // curr_data is previous agent modified class data.
636 // And this has been changed by the new agent so
637 // we can delete it now.
638 _curr_env->Deallocate(_curr_data);
639 }
640
641 // Class file data has changed by the current agent.
642 _curr_data = new_data;
643 _curr_len = new_len;
644 // Save the current agent env we need this to deallocate the
645 // memory allocated by this agent.
646 _curr_env = env;
647 }
648 }
649
650 void copy_modified_data() {
651 // if one of the agent has modified class file data.
652 // Copy modified class data to new resources array.
653 if (_curr_data != *_data_ptr) {
654 *_data_ptr = NEW_RESOURCE_ARRAY(u1, _curr_len);
655 memcpy(*_data_ptr, _curr_data, _curr_len);
656 *_end_ptr = *_data_ptr + _curr_len;
657 _curr_env->Deallocate(_curr_data);
658 }
659 }
660 };
661
662 bool JvmtiExport::_should_post_class_file_load_hook = false;
663
664 // this entry is for class file load hook on class load, redefine and retransform
665 void JvmtiExport::post_class_file_load_hook(Symbol* h_name,
666 Handle class_loader,
667 Handle h_protection_domain,
668 unsigned char **data_ptr,
669 unsigned char **end_ptr,
670 JvmtiCachedClassFileData **cache_ptr) {
671 JvmtiClassFileLoadHookPoster poster(h_name, class_loader,
672 h_protection_domain,
673 data_ptr, end_ptr,
674 cache_ptr);
675 poster.post();
676 }
677
678 void JvmtiExport::report_unsupported(bool on) {
679 // If any JVMTI service is turned on, we need to exit before native code
680 // tries to access nonexistant services.
681 if (on) {
682 vm_exit_during_initialization("Java Kernel does not support JVMTI.");
683 }
684 }
685
686
687 static inline Klass* oop_to_klass(oop obj) {
688 Klass* k = obj->klass();
689
690 // if the object is a java.lang.Class then return the java mirror
691 if (k == SystemDictionary::Class_klass()) {
692 if (!java_lang_Class::is_primitive(obj)) {
693 k = java_lang_Class::as_Klass(obj);
694 assert(k != NULL, "class for non-primitive mirror must exist");
695 }
696 }
697 return k;
698 }
699
700 class JvmtiVMObjectAllocEventMark : public JvmtiClassEventMark {
701 private:
702 jobject _jobj;
703 jlong _size;
704 public:
705 JvmtiVMObjectAllocEventMark(JavaThread *thread, oop obj) : JvmtiClassEventMark(thread, oop_to_klass(obj)) {
706 _jobj = (jobject)to_jobject(obj);
707 _size = obj->size() * wordSize;
708 };
709 jobject jni_jobject() { return _jobj; }
710 jlong size() { return _size; }
711 };
712
713 class JvmtiCompiledMethodLoadEventMark : public JvmtiMethodEventMark {
714 private:
715 jint _code_size;
716 const void *_code_data;
717 jint _map_length;
718 jvmtiAddrLocationMap *_map;
719 const void *_compile_info;
720 public:
721 JvmtiCompiledMethodLoadEventMark(JavaThread *thread, nmethod *nm, void* compile_info_ptr = NULL)
722 : JvmtiMethodEventMark(thread,methodHandle(thread, nm->method())) {
723 _code_data = nm->insts_begin();
724 _code_size = nm->insts_size();
725 _compile_info = compile_info_ptr; // Set void pointer of compiledMethodLoad Event. Default value is NULL.
726 JvmtiCodeBlobEvents::build_jvmti_addr_location_map(nm, &_map, &_map_length);
727 }
728 ~JvmtiCompiledMethodLoadEventMark() {
729 FREE_C_HEAP_ARRAY(jvmtiAddrLocationMap, _map, mtInternal);
730 }
731
732 jint code_size() { return _code_size; }
733 const void *code_data() { return _code_data; }
734 jint map_length() { return _map_length; }
735 const jvmtiAddrLocationMap* map() { return _map; }
736 const void *compile_info() { return _compile_info; }
737 };
738
739
740
741 class JvmtiMonitorEventMark : public JvmtiThreadEventMark {
742 private:
743 jobject _jobj;
744 public:
745 JvmtiMonitorEventMark(JavaThread *thread, oop object)
746 : JvmtiThreadEventMark(thread){
747 _jobj = to_jobject(object);
748 }
749 jobject jni_object() { return _jobj; }
750 };
751
752 ///////////////////////////////////////////////////////////////
753 //
754 // pending CompiledMethodUnload support
755 //
756
757 void JvmtiExport::post_compiled_method_unload(
758 jmethodID method, const void *code_begin) {
759 JavaThread* thread = JavaThread::current();
760 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_UNLOAD,
761 ("JVMTI [%s] method compile unload event triggered",
762 JvmtiTrace::safe_get_thread_name(thread)));
763
764 // post the event for each environment that has this event enabled.
765 JvmtiEnvIterator it;
766 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
767 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_UNLOAD)) {
768
769 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_UNLOAD,
770 ("JVMTI [%s] class compile method unload event sent jmethodID " PTR_FORMAT,
771 JvmtiTrace::safe_get_thread_name(thread), method));
772
773 ResourceMark rm(thread);
774
775 JvmtiEventMark jem(thread);
776 JvmtiJavaThreadEventTransition jet(thread);
777 jvmtiEventCompiledMethodUnload callback = env->callbacks()->CompiledMethodUnload;
778 if (callback != NULL) {
779 (*callback)(env->jvmti_external(), method, code_begin);
780 }
781 }
782 }
783 }
784
785 ///////////////////////////////////////////////////////////////
786 //
787 // JvmtiExport
788 //
789
790 void JvmtiExport::post_raw_breakpoint(JavaThread *thread, Method* method, address location) {
791 HandleMark hm(thread);
792 methodHandle mh(thread, method);
793
794 JvmtiThreadState *state = thread->jvmti_thread_state();
795 if (state == NULL) {
796 return;
797 }
798 EVT_TRIG_TRACE(JVMTI_EVENT_BREAKPOINT, ("JVMTI [%s] Trg Breakpoint triggered",
799 JvmtiTrace::safe_get_thread_name(thread)));
800 JvmtiEnvThreadStateIterator it(state);
801 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
802 ets->compare_and_set_current_location(mh(), location, JVMTI_EVENT_BREAKPOINT);
803 if (!ets->breakpoint_posted() && ets->is_enabled(JVMTI_EVENT_BREAKPOINT)) {
804 ThreadState old_os_state = thread->osthread()->get_state();
805 thread->osthread()->set_state(BREAKPOINTED);
806 EVT_TRACE(JVMTI_EVENT_BREAKPOINT, ("JVMTI [%s] Evt Breakpoint sent %s.%s @ %d",
807 JvmtiTrace::safe_get_thread_name(thread),
808 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
809 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
810 location - mh()->code_base() ));
811
812 JvmtiEnv *env = ets->get_env();
813 JvmtiLocationEventMark jem(thread, mh, location);
814 JvmtiJavaThreadEventTransition jet(thread);
815 jvmtiEventBreakpoint callback = env->callbacks()->Breakpoint;
816 if (callback != NULL) {
817 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
818 jem.jni_methodID(), jem.location());
819 }
820
821 ets->set_breakpoint_posted();
822 thread->osthread()->set_state(old_os_state);
823 }
824 }
825 }
826
827 //////////////////////////////////////////////////////////////////////////////
828
829 bool JvmtiExport::_can_get_source_debug_extension = false;
830 bool JvmtiExport::_can_maintain_original_method_order = false;
831 bool JvmtiExport::_can_post_interpreter_events = false;
832 bool JvmtiExport::_can_post_on_exceptions = false;
833 bool JvmtiExport::_can_post_breakpoint = false;
834 bool JvmtiExport::_can_post_field_access = false;
835 bool JvmtiExport::_can_post_field_modification = false;
836 bool JvmtiExport::_can_post_method_entry = false;
837 bool JvmtiExport::_can_post_method_exit = false;
838 bool JvmtiExport::_can_pop_frame = false;
839 bool JvmtiExport::_can_force_early_return = false;
840
841 bool JvmtiExport::_should_post_single_step = false;
842 bool JvmtiExport::_should_post_field_access = false;
843 bool JvmtiExport::_should_post_field_modification = false;
844 bool JvmtiExport::_should_post_class_load = false;
845 bool JvmtiExport::_should_post_class_prepare = false;
846 bool JvmtiExport::_should_post_class_unload = false;
847 bool JvmtiExport::_should_post_thread_life = false;
848 bool JvmtiExport::_should_clean_up_heap_objects = false;
849 bool JvmtiExport::_should_post_native_method_bind = false;
850 bool JvmtiExport::_should_post_dynamic_code_generated = false;
851 bool JvmtiExport::_should_post_data_dump = false;
852 bool JvmtiExport::_should_post_compiled_method_load = false;
853 bool JvmtiExport::_should_post_compiled_method_unload = false;
854 bool JvmtiExport::_should_post_monitor_contended_enter = false;
855 bool JvmtiExport::_should_post_monitor_contended_entered = false;
856 bool JvmtiExport::_should_post_monitor_wait = false;
857 bool JvmtiExport::_should_post_monitor_waited = false;
858 bool JvmtiExport::_should_post_garbage_collection_start = false;
859 bool JvmtiExport::_should_post_garbage_collection_finish = false;
860 bool JvmtiExport::_should_post_object_free = false;
861 bool JvmtiExport::_should_post_resource_exhausted = false;
862 bool JvmtiExport::_should_post_vm_object_alloc = false;
863 bool JvmtiExport::_should_post_on_exceptions = false;
864
865 ////////////////////////////////////////////////////////////////////////////////////////////////
866
867
868 //
869 // JVMTI single step management
870 //
871 void JvmtiExport::at_single_stepping_point(JavaThread *thread, Method* method, address location) {
872 assert(JvmtiExport::should_post_single_step(), "must be single stepping");
873
874 HandleMark hm(thread);
875 methodHandle mh(thread, method);
876
877 // update information about current location and post a step event
878 JvmtiThreadState *state = thread->jvmti_thread_state();
879 if (state == NULL) {
880 return;
881 }
882 EVT_TRIG_TRACE(JVMTI_EVENT_SINGLE_STEP, ("JVMTI [%s] Trg Single Step triggered",
883 JvmtiTrace::safe_get_thread_name(thread)));
884 if (!state->hide_single_stepping()) {
885 if (state->is_pending_step_for_popframe()) {
886 state->process_pending_step_for_popframe();
887 }
888 if (state->is_pending_step_for_earlyret()) {
889 state->process_pending_step_for_earlyret();
890 }
891 JvmtiExport::post_single_step(thread, mh(), location);
892 }
893 }
894
895
896 void JvmtiExport::expose_single_stepping(JavaThread *thread) {
897 JvmtiThreadState *state = thread->jvmti_thread_state();
898 if (state != NULL) {
899 state->clear_hide_single_stepping();
900 }
901 }
902
903
904 bool JvmtiExport::hide_single_stepping(JavaThread *thread) {
905 JvmtiThreadState *state = thread->jvmti_thread_state();
906 if (state != NULL && state->is_enabled(JVMTI_EVENT_SINGLE_STEP)) {
907 state->set_hide_single_stepping();
908 return true;
909 } else {
910 return false;
911 }
912 }
913
914 void JvmtiExport::post_class_load(JavaThread *thread, Klass* klass) {
915 HandleMark hm(thread);
916 KlassHandle kh(thread, klass);
917
918 EVT_TRIG_TRACE(JVMTI_EVENT_CLASS_LOAD, ("JVMTI [%s] Trg Class Load triggered",
919 JvmtiTrace::safe_get_thread_name(thread)));
920 JvmtiThreadState* state = thread->jvmti_thread_state();
921 if (state == NULL) {
922 return;
923 }
924 JvmtiEnvThreadStateIterator it(state);
925 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
926 if (ets->is_enabled(JVMTI_EVENT_CLASS_LOAD)) {
927 EVT_TRACE(JVMTI_EVENT_CLASS_LOAD, ("JVMTI [%s] Evt Class Load sent %s",
928 JvmtiTrace::safe_get_thread_name(thread),
929 kh()==NULL? "NULL" : kh()->external_name() ));
930
931 JvmtiEnv *env = ets->get_env();
932 JvmtiClassEventMark jem(thread, kh());
933 JvmtiJavaThreadEventTransition jet(thread);
934 jvmtiEventClassLoad callback = env->callbacks()->ClassLoad;
935 if (callback != NULL) {
936 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_class());
937 }
938 }
939 }
940 }
941
942
943 void JvmtiExport::post_class_prepare(JavaThread *thread, Klass* klass) {
944 HandleMark hm(thread);
945 KlassHandle kh(thread, klass);
946
947 EVT_TRIG_TRACE(JVMTI_EVENT_CLASS_PREPARE, ("JVMTI [%s] Trg Class Prepare triggered",
948 JvmtiTrace::safe_get_thread_name(thread)));
949 JvmtiThreadState* state = thread->jvmti_thread_state();
950 if (state == NULL) {
951 return;
952 }
953 JvmtiEnvThreadStateIterator it(state);
954 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
955 if (ets->is_enabled(JVMTI_EVENT_CLASS_PREPARE)) {
956 EVT_TRACE(JVMTI_EVENT_CLASS_PREPARE, ("JVMTI [%s] Evt Class Prepare sent %s",
957 JvmtiTrace::safe_get_thread_name(thread),
958 kh()==NULL? "NULL" : kh()->external_name() ));
959
960 JvmtiEnv *env = ets->get_env();
961 JvmtiClassEventMark jem(thread, kh());
962 JvmtiJavaThreadEventTransition jet(thread);
963 jvmtiEventClassPrepare callback = env->callbacks()->ClassPrepare;
964 if (callback != NULL) {
965 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_class());
966 }
967 }
968 }
969 }
970
971 void JvmtiExport::post_class_unload(Klass* klass) {
972 Thread *thread = Thread::current();
973 HandleMark hm(thread);
974 KlassHandle kh(thread, klass);
975
976 EVT_TRIG_TRACE(EXT_EVENT_CLASS_UNLOAD, ("JVMTI [?] Trg Class Unload triggered" ));
977 if (JvmtiEventController::is_enabled((jvmtiEvent)EXT_EVENT_CLASS_UNLOAD)) {
978 assert(thread->is_VM_thread(), "wrong thread");
979
980 // get JavaThread for whom we are proxy
981 JavaThread *real_thread =
982 (JavaThread *)((VMThread *)thread)->vm_operation()->calling_thread();
983
984 JvmtiEnvIterator it;
985 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
986 if (env->is_enabled((jvmtiEvent)EXT_EVENT_CLASS_UNLOAD)) {
987 EVT_TRACE(EXT_EVENT_CLASS_UNLOAD, ("JVMTI [?] Evt Class Unload sent %s",
988 kh()==NULL? "NULL" : kh()->external_name() ));
989
990 // do everything manually, since this is a proxy - needs special care
991 JNIEnv* jni_env = real_thread->jni_environment();
992 jthread jt = (jthread)JNIHandles::make_local(real_thread, real_thread->threadObj());
993 jclass jk = (jclass)JNIHandles::make_local(real_thread, kh()->java_mirror());
994
995 // Before we call the JVMTI agent, we have to set the state in the
996 // thread for which we are proxying.
997 JavaThreadState prev_state = real_thread->thread_state();
998 assert(((Thread *)real_thread)->is_ConcurrentGC_thread() ||
999 (real_thread->is_Java_thread() && prev_state == _thread_blocked),
1000 "should be ConcurrentGCThread or JavaThread at safepoint");
1001 real_thread->set_thread_state(_thread_in_native);
1002
1003 jvmtiExtensionEvent callback = env->ext_callbacks()->ClassUnload;
1004 if (callback != NULL) {
1005 (*callback)(env->jvmti_external(), jni_env, jt, jk);
1006 }
1007
1008 assert(real_thread->thread_state() == _thread_in_native,
1009 "JavaThread should be in native");
1010 real_thread->set_thread_state(prev_state);
1011
1012 JNIHandles::destroy_local(jk);
1013 JNIHandles::destroy_local(jt);
1014 }
1015 }
1016 }
1017 }
1018
1019
1020 void JvmtiExport::post_thread_start(JavaThread *thread) {
1021 assert(thread->thread_state() == _thread_in_vm, "must be in vm state");
1022
1023 EVT_TRIG_TRACE(JVMTI_EVENT_THREAD_START, ("JVMTI [%s] Trg Thread Start event triggered",
1024 JvmtiTrace::safe_get_thread_name(thread)));
1025
1026 // do JVMTI thread initialization (if needed)
1027 JvmtiEventController::thread_started(thread);
1028
1029 // Do not post thread start event for hidden java thread.
1030 if (JvmtiEventController::is_enabled(JVMTI_EVENT_THREAD_START) &&
1031 !thread->is_hidden_from_external_view()) {
1032 JvmtiEnvIterator it;
1033 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1034 if (env->is_enabled(JVMTI_EVENT_THREAD_START)) {
1035 EVT_TRACE(JVMTI_EVENT_THREAD_START, ("JVMTI [%s] Evt Thread Start event sent",
1036 JvmtiTrace::safe_get_thread_name(thread) ));
1037
1038 JvmtiThreadEventMark jem(thread);
1039 JvmtiJavaThreadEventTransition jet(thread);
1040 jvmtiEventThreadStart callback = env->callbacks()->ThreadStart;
1041 if (callback != NULL) {
1042 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread());
1043 }
1044 }
1045 }
1046 }
1047 }
1048
1049
1050 void JvmtiExport::post_thread_end(JavaThread *thread) {
1051 EVT_TRIG_TRACE(JVMTI_EVENT_THREAD_END, ("JVMTI [%s] Trg Thread End event triggered",
1052 JvmtiTrace::safe_get_thread_name(thread)));
1053
1054 JvmtiThreadState *state = thread->jvmti_thread_state();
1055 if (state == NULL) {
1056 return;
1057 }
1058
1059 // Do not post thread end event for hidden java thread.
1060 if (state->is_enabled(JVMTI_EVENT_THREAD_END) &&
1061 !thread->is_hidden_from_external_view()) {
1062
1063 JvmtiEnvThreadStateIterator it(state);
1064 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1065 if (ets->is_enabled(JVMTI_EVENT_THREAD_END)) {
1066 EVT_TRACE(JVMTI_EVENT_THREAD_END, ("JVMTI [%s] Evt Thread End event sent",
1067 JvmtiTrace::safe_get_thread_name(thread) ));
1068
1069 JvmtiEnv *env = ets->get_env();
1070 JvmtiThreadEventMark jem(thread);
1071 JvmtiJavaThreadEventTransition jet(thread);
1072 jvmtiEventThreadEnd callback = env->callbacks()->ThreadEnd;
1073 if (callback != NULL) {
1074 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread());
1075 }
1076 }
1077 }
1078 }
1079 }
1080
1081 void JvmtiExport::post_object_free(JvmtiEnv* env, jlong tag) {
1082 assert(SafepointSynchronize::is_at_safepoint(), "must be executed at safepoint");
1083 assert(env->is_enabled(JVMTI_EVENT_OBJECT_FREE), "checking");
1084
1085 EVT_TRIG_TRACE(JVMTI_EVENT_OBJECT_FREE, ("JVMTI [?] Trg Object Free triggered" ));
1086 EVT_TRACE(JVMTI_EVENT_OBJECT_FREE, ("JVMTI [?] Evt Object Free sent"));
1087
1088 jvmtiEventObjectFree callback = env->callbacks()->ObjectFree;
1089 if (callback != NULL) {
1090 (*callback)(env->jvmti_external(), tag);
1091 }
1092 }
1093
1094 void JvmtiExport::post_resource_exhausted(jint resource_exhausted_flags, const char* description) {
1095 EVT_TRIG_TRACE(JVMTI_EVENT_RESOURCE_EXHAUSTED, ("JVMTI Trg resource exhausted event triggered" ));
1096
1097 JvmtiEnvIterator it;
1098 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1099 if (env->is_enabled(JVMTI_EVENT_RESOURCE_EXHAUSTED)) {
1100 EVT_TRACE(JVMTI_EVENT_RESOURCE_EXHAUSTED, ("JVMTI Evt resource exhausted event sent" ));
1101
1102 JavaThread *thread = JavaThread::current();
1103 JvmtiThreadEventMark jem(thread);
1104 JvmtiJavaThreadEventTransition jet(thread);
1105 jvmtiEventResourceExhausted callback = env->callbacks()->ResourceExhausted;
1106 if (callback != NULL) {
1107 (*callback)(env->jvmti_external(), jem.jni_env(),
1108 resource_exhausted_flags, NULL, description);
1109 }
1110 }
1111 }
1112 }
1113
1114 void JvmtiExport::post_method_entry(JavaThread *thread, Method* method, frame current_frame) {
1115 HandleMark hm(thread);
1116 methodHandle mh(thread, method);
1117
1118 EVT_TRIG_TRACE(JVMTI_EVENT_METHOD_ENTRY, ("JVMTI [%s] Trg Method Entry triggered %s.%s",
1119 JvmtiTrace::safe_get_thread_name(thread),
1120 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1121 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1122
1123 JvmtiThreadState* state = thread->jvmti_thread_state();
1124 if (state == NULL || !state->is_interp_only_mode()) {
1125 // for any thread that actually wants method entry, interp_only_mode is set
1126 return;
1127 }
1128
1129 state->incr_cur_stack_depth();
1130
1131 if (state->is_enabled(JVMTI_EVENT_METHOD_ENTRY)) {
1132 JvmtiEnvThreadStateIterator it(state);
1133 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1134 if (ets->is_enabled(JVMTI_EVENT_METHOD_ENTRY)) {
1135 EVT_TRACE(JVMTI_EVENT_METHOD_ENTRY, ("JVMTI [%s] Evt Method Entry sent %s.%s",
1136 JvmtiTrace::safe_get_thread_name(thread),
1137 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1138 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1139
1140 JvmtiEnv *env = ets->get_env();
1141 JvmtiMethodEventMark jem(thread, mh);
1142 JvmtiJavaThreadEventTransition jet(thread);
1143 jvmtiEventMethodEntry callback = env->callbacks()->MethodEntry;
1144 if (callback != NULL) {
1145 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_methodID());
1146 }
1147 }
1148 }
1149 }
1150 }
1151
1152 void JvmtiExport::post_method_exit(JavaThread *thread, Method* method, frame current_frame) {
1153 HandleMark hm(thread);
1154 methodHandle mh(thread, method);
1155
1156 EVT_TRIG_TRACE(JVMTI_EVENT_METHOD_EXIT, ("JVMTI [%s] Trg Method Exit triggered %s.%s",
1157 JvmtiTrace::safe_get_thread_name(thread),
1158 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1159 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1160
1161 JvmtiThreadState *state = thread->jvmti_thread_state();
1162 if (state == NULL || !state->is_interp_only_mode()) {
1163 // for any thread that actually wants method exit, interp_only_mode is set
1164 return;
1165 }
1166
1167 // return a flag when a method terminates by throwing an exception
1168 // i.e. if an exception is thrown and it's not caught by the current method
1169 bool exception_exit = state->is_exception_detected() && !state->is_exception_caught();
1170
1171
1172 if (state->is_enabled(JVMTI_EVENT_METHOD_EXIT)) {
1173 Handle result;
1174 jvalue value;
1175 value.j = 0L;
1176
1177 // if the method hasn't been popped because of an exception then we populate
1178 // the return_value parameter for the callback. At this point we only have
1179 // the address of a "raw result" and we just call into the interpreter to
1180 // convert this into a jvalue.
1181 if (!exception_exit) {
1182 oop oop_result;
1183 BasicType type = current_frame.interpreter_frame_result(&oop_result, &value);
1184 if (type == T_OBJECT || type == T_ARRAY) {
1185 result = Handle(thread, oop_result);
1186 }
1187 }
1188
1189 JvmtiEnvThreadStateIterator it(state);
1190 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1191 if (ets->is_enabled(JVMTI_EVENT_METHOD_EXIT)) {
1192 EVT_TRACE(JVMTI_EVENT_METHOD_EXIT, ("JVMTI [%s] Evt Method Exit sent %s.%s",
1193 JvmtiTrace::safe_get_thread_name(thread),
1194 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1195 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1196
1197 JvmtiEnv *env = ets->get_env();
1198 JvmtiMethodEventMark jem(thread, mh);
1199 if (result.not_null()) {
1200 value.l = JNIHandles::make_local(thread, result());
1201 }
1202 JvmtiJavaThreadEventTransition jet(thread);
1203 jvmtiEventMethodExit callback = env->callbacks()->MethodExit;
1204 if (callback != NULL) {
1205 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1206 jem.jni_methodID(), exception_exit, value);
1207 }
1208 }
1209 }
1210 }
1211
1212 if (state->is_enabled(JVMTI_EVENT_FRAME_POP)) {
1213 JvmtiEnvThreadStateIterator it(state);
1214 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1215 int cur_frame_number = state->cur_stack_depth();
1216
1217 if (ets->is_frame_pop(cur_frame_number)) {
1218 // we have a NotifyFramePop entry for this frame.
1219 // now check that this env/thread wants this event
1220 if (ets->is_enabled(JVMTI_EVENT_FRAME_POP)) {
1221 EVT_TRACE(JVMTI_EVENT_FRAME_POP, ("JVMTI [%s] Evt Frame Pop sent %s.%s",
1222 JvmtiTrace::safe_get_thread_name(thread),
1223 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1224 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1225
1226 // we also need to issue a frame pop event for this frame
1227 JvmtiEnv *env = ets->get_env();
1228 JvmtiMethodEventMark jem(thread, mh);
1229 JvmtiJavaThreadEventTransition jet(thread);
1230 jvmtiEventFramePop callback = env->callbacks()->FramePop;
1231 if (callback != NULL) {
1232 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1233 jem.jni_methodID(), exception_exit);
1234 }
1235 }
1236 // remove the frame's entry
1237 ets->clear_frame_pop(cur_frame_number);
1238 }
1239 }
1240 }
1241
1242 #ifdef AARCH64
1243 // FIXME: this is just a kludge to get JVMTI going. Compiled
1244 // MethodHandle code doesn't call the JVMTI notify routines, so the
1245 // stack depth we see here is wrong.
1246 state->invalidate_cur_stack_depth();
1247 #else
1248 state->decr_cur_stack_depth();
1249 #endif
1250 }
1251
1252
1253 // Todo: inline this for optimization
1254 void JvmtiExport::post_single_step(JavaThread *thread, Method* method, address location) {
1255 HandleMark hm(thread);
1256 methodHandle mh(thread, method);
1257
1258 JvmtiThreadState *state = thread->jvmti_thread_state();
1259 if (state == NULL) {
1260 return;
1261 }
1262 JvmtiEnvThreadStateIterator it(state);
1263 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1264 ets->compare_and_set_current_location(mh(), location, JVMTI_EVENT_SINGLE_STEP);
1265 if (!ets->single_stepping_posted() && ets->is_enabled(JVMTI_EVENT_SINGLE_STEP)) {
1266 EVT_TRACE(JVMTI_EVENT_SINGLE_STEP, ("JVMTI [%s] Evt Single Step sent %s.%s @ %d",
1267 JvmtiTrace::safe_get_thread_name(thread),
1268 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1269 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1270 location - mh()->code_base() ));
1271
1272 JvmtiEnv *env = ets->get_env();
1273 JvmtiLocationEventMark jem(thread, mh, location);
1274 JvmtiJavaThreadEventTransition jet(thread);
1275 jvmtiEventSingleStep callback = env->callbacks()->SingleStep;
1276 if (callback != NULL) {
1277 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1278 jem.jni_methodID(), jem.location());
1279 }
1280
1281 ets->set_single_stepping_posted();
1282 }
1283 }
1284 }
1285
1286
1287 void JvmtiExport::post_exception_throw(JavaThread *thread, Method* method, address location, oop exception) {
1288 HandleMark hm(thread);
1289 methodHandle mh(thread, method);
1290 Handle exception_handle(thread, exception);
1291
1292 JvmtiThreadState *state = thread->jvmti_thread_state();
1293 if (state == NULL) {
1294 return;
1295 }
1296
1297 EVT_TRIG_TRACE(JVMTI_EVENT_EXCEPTION, ("JVMTI [%s] Trg Exception thrown triggered",
1298 JvmtiTrace::safe_get_thread_name(thread)));
1299 if (!state->is_exception_detected()) {
1300 state->set_exception_detected();
1301 JvmtiEnvThreadStateIterator it(state);
1302 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1303 if (ets->is_enabled(JVMTI_EVENT_EXCEPTION) && (exception != NULL)) {
1304
1305 EVT_TRACE(JVMTI_EVENT_EXCEPTION,
1306 ("JVMTI [%s] Evt Exception thrown sent %s.%s @ %d",
1307 JvmtiTrace::safe_get_thread_name(thread),
1308 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1309 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1310 location - mh()->code_base() ));
1311
1312 JvmtiEnv *env = ets->get_env();
1313 JvmtiExceptionEventMark jem(thread, mh, location, exception_handle);
1314
1315 // It's okay to clear these exceptions here because we duplicate
1316 // this lookup in InterpreterRuntime::exception_handler_for_exception.
1317 EXCEPTION_MARK;
1318
1319 bool should_repeat;
1320 vframeStream st(thread);
1321 assert(!st.at_end(), "cannot be at end");
1322 Method* current_method = NULL;
1323 // A GC may occur during the Method::fast_exception_handler_bci_for()
1324 // call below if it needs to load the constraint class. Using a
1325 // methodHandle to keep the 'current_method' from being deallocated
1326 // if GC happens.
1327 methodHandle current_mh = methodHandle(thread, current_method);
1328 int current_bci = -1;
1329 do {
1330 current_method = st.method();
1331 current_mh = methodHandle(thread, current_method);
1332 current_bci = st.bci();
1333 do {
1334 should_repeat = false;
1335 KlassHandle eh_klass(thread, exception_handle()->klass());
1336 current_bci = Method::fast_exception_handler_bci_for(
1337 current_mh, eh_klass, current_bci, THREAD);
1338 if (HAS_PENDING_EXCEPTION) {
1339 exception_handle = Handle(thread, PENDING_EXCEPTION);
1340 CLEAR_PENDING_EXCEPTION;
1341 should_repeat = true;
1342 }
1343 } while (should_repeat && (current_bci != -1));
1344 st.next();
1345 } while ((current_bci < 0) && (!st.at_end()));
1346
1347 jmethodID catch_jmethodID;
1348 if (current_bci < 0) {
1349 catch_jmethodID = 0;
1350 current_bci = 0;
1351 } else {
1352 catch_jmethodID = jem.to_jmethodID(current_mh);
1353 }
1354
1355 JvmtiJavaThreadEventTransition jet(thread);
1356 jvmtiEventException callback = env->callbacks()->Exception;
1357 if (callback != NULL) {
1358 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1359 jem.jni_methodID(), jem.location(),
1360 jem.exception(),
1361 catch_jmethodID, current_bci);
1362 }
1363 }
1364 }
1365 }
1366
1367 // frames may get popped because of this throw, be safe - invalidate cached depth
1368 state->invalidate_cur_stack_depth();
1369 }
1370
1371
1372 void JvmtiExport::notice_unwind_due_to_exception(JavaThread *thread, Method* method, address location, oop exception, bool in_handler_frame) {
1373 HandleMark hm(thread);
1374 methodHandle mh(thread, method);
1375 Handle exception_handle(thread, exception);
1376
1377 JvmtiThreadState *state = thread->jvmti_thread_state();
1378 if (state == NULL) {
1379 return;
1380 }
1381 EVT_TRIG_TRACE(JVMTI_EVENT_EXCEPTION_CATCH,
1382 ("JVMTI [%s] Trg unwind_due_to_exception triggered %s.%s @ %s%d - %s",
1383 JvmtiTrace::safe_get_thread_name(thread),
1384 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1385 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1386 location==0? "no location:" : "",
1387 location==0? 0 : location - mh()->code_base(),
1388 in_handler_frame? "in handler frame" : "not handler frame" ));
1389
1390 if (state->is_exception_detected()) {
1391
1392 state->invalidate_cur_stack_depth();
1393 if (!in_handler_frame) {
1394 // Not in exception handler.
1395 if(state->is_interp_only_mode()) {
1396 // method exit and frame pop events are posted only in interp mode.
1397 // When these events are enabled code should be in running in interp mode.
1398 JvmtiExport::post_method_exit(thread, method, thread->last_frame());
1399 // The cached cur_stack_depth might have changed from the
1400 // operations of frame pop or method exit. We are not 100% sure
1401 // the cached cur_stack_depth is still valid depth so invalidate
1402 // it.
1403 state->invalidate_cur_stack_depth();
1404 }
1405 } else {
1406 // In exception handler frame. Report exception catch.
1407 assert(location != NULL, "must be a known location");
1408 // Update cur_stack_depth - the frames above the current frame
1409 // have been unwound due to this exception:
1410 assert(!state->is_exception_caught(), "exception must not be caught yet.");
1411 state->set_exception_caught();
1412
1413 JvmtiEnvThreadStateIterator it(state);
1414 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1415 if (ets->is_enabled(JVMTI_EVENT_EXCEPTION_CATCH) && (exception_handle() != NULL)) {
1416 EVT_TRACE(JVMTI_EVENT_EXCEPTION_CATCH,
1417 ("JVMTI [%s] Evt ExceptionCatch sent %s.%s @ %d",
1418 JvmtiTrace::safe_get_thread_name(thread),
1419 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1420 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1421 location - mh()->code_base() ));
1422
1423 JvmtiEnv *env = ets->get_env();
1424 JvmtiExceptionEventMark jem(thread, mh, location, exception_handle);
1425 JvmtiJavaThreadEventTransition jet(thread);
1426 jvmtiEventExceptionCatch callback = env->callbacks()->ExceptionCatch;
1427 if (callback != NULL) {
1428 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1429 jem.jni_methodID(), jem.location(),
1430 jem.exception());
1431 }
1432 }
1433 }
1434 }
1435 }
1436 }
1437
1438 oop JvmtiExport::jni_GetField_probe(JavaThread *thread, jobject jobj, oop obj,
1439 Klass* klass, jfieldID fieldID, bool is_static) {
1440 if (*((int *)get_field_access_count_addr()) > 0 && thread->has_last_Java_frame()) {
1441 // At least one field access watch is set so we have more work
1442 // to do. This wrapper is used by entry points that allow us
1443 // to create handles in post_field_access_by_jni().
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 }
1450
1451 oop JvmtiExport::jni_GetField_probe_nh(JavaThread *thread, jobject jobj, oop obj,
1452 Klass* klass, jfieldID fieldID, bool is_static) {
1453 if (*((int *)get_field_access_count_addr()) > 0 && thread->has_last_Java_frame()) {
1454 // At least one field access watch is set so we have more work
1455 // to do. This wrapper is used by "quick" entry points that don't
1456 // allow us to create handles in post_field_access_by_jni(). We
1457 // override that with a ResetNoHandleMark.
1458 ResetNoHandleMark rnhm;
1459 post_field_access_by_jni(thread, obj, klass, fieldID, is_static);
1460 // event posting can block so refetch oop if we were passed a jobj
1461 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj);
1462 }
1463 return obj;
1464 }
1465
1466 void JvmtiExport::post_field_access_by_jni(JavaThread *thread, oop obj,
1467 Klass* klass, jfieldID fieldID, bool is_static) {
1468 // We must be called with a Java context in order to provide reasonable
1469 // values for the klazz, method, and location fields. The callers of this
1470 // function don't make the call unless there is a Java context.
1471 assert(thread->has_last_Java_frame(), "must be called with a Java context");
1472
1473 ResourceMark rm;
1474 fieldDescriptor fd;
1475 // if get_field_descriptor finds fieldID to be invalid, then we just bail
1476 bool valid_fieldID = JvmtiEnv::get_field_descriptor(klass, fieldID, &fd);
1477 assert(valid_fieldID == true,"post_field_access_by_jni called with invalid fieldID");
1478 if (!valid_fieldID) return;
1479 // field accesses are not watched so bail
1480 if (!fd.is_field_access_watched()) return;
1481
1482 HandleMark hm(thread);
1483 KlassHandle h_klass(thread, klass);
1484 Handle h_obj;
1485 if (!is_static) {
1486 // non-static field accessors have an object, but we need a handle
1487 assert(obj != NULL, "non-static needs an object");
1488 h_obj = Handle(thread, obj);
1489 }
1490 post_field_access(thread,
1491 thread->last_frame().interpreter_frame_method(),
1492 thread->last_frame().interpreter_frame_bcp(),
1493 h_klass, h_obj, fieldID);
1494 }
1495
1496 void JvmtiExport::post_field_access(JavaThread *thread, Method* method,
1497 address location, KlassHandle field_klass, Handle object, jfieldID field) {
1498
1499 HandleMark hm(thread);
1500 methodHandle mh(thread, method);
1501
1502 JvmtiThreadState *state = thread->jvmti_thread_state();
1503 if (state == NULL) {
1504 return;
1505 }
1506 EVT_TRIG_TRACE(JVMTI_EVENT_FIELD_ACCESS, ("JVMTI [%s] Trg Field Access event triggered",
1507 JvmtiTrace::safe_get_thread_name(thread)));
1508 JvmtiEnvThreadStateIterator it(state);
1509 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1510 if (ets->is_enabled(JVMTI_EVENT_FIELD_ACCESS)) {
1511 EVT_TRACE(JVMTI_EVENT_FIELD_ACCESS, ("JVMTI [%s] Evt Field Access event sent %s.%s @ %d",
1512 JvmtiTrace::safe_get_thread_name(thread),
1513 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1514 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1515 location - mh()->code_base() ));
1516
1517 JvmtiEnv *env = ets->get_env();
1518 JvmtiLocationEventMark jem(thread, mh, location);
1519 jclass field_jclass = jem.to_jclass(field_klass());
1520 jobject field_jobject = jem.to_jobject(object());
1521 JvmtiJavaThreadEventTransition jet(thread);
1522 jvmtiEventFieldAccess callback = env->callbacks()->FieldAccess;
1523 if (callback != NULL) {
1524 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1525 jem.jni_methodID(), jem.location(),
1526 field_jclass, field_jobject, field);
1527 }
1528 }
1529 }
1530 }
1531
1532 oop JvmtiExport::jni_SetField_probe(JavaThread *thread, jobject jobj, oop obj,
1533 Klass* klass, jfieldID fieldID, bool is_static,
1534 char sig_type, jvalue *value) {
1535 if (*((int *)get_field_modification_count_addr()) > 0 && thread->has_last_Java_frame()) {
1536 // At least one field modification watch is set so we have more work
1537 // to do. This wrapper is used by entry points that allow us
1538 // to create handles in post_field_modification_by_jni().
1539 post_field_modification_by_jni(thread, obj, klass, fieldID, is_static, sig_type, value);
1540 // event posting can block so refetch oop if we were passed a jobj
1541 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj);
1542 }
1543 return obj;
1544 }
1545
1546 oop JvmtiExport::jni_SetField_probe_nh(JavaThread *thread, jobject jobj, oop obj,
1547 Klass* klass, jfieldID fieldID, bool is_static,
1548 char sig_type, jvalue *value) {
1549 if (*((int *)get_field_modification_count_addr()) > 0 && thread->has_last_Java_frame()) {
1550 // At least one field modification watch is set so we have more work
1551 // to do. This wrapper is used by "quick" entry points that don't
1552 // allow us to create handles in post_field_modification_by_jni(). We
1553 // override that with a ResetNoHandleMark.
1554 ResetNoHandleMark rnhm;
1555 post_field_modification_by_jni(thread, obj, klass, fieldID, is_static, sig_type, value);
1556 // event posting can block so refetch oop if we were passed a jobj
1557 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj);
1558 }
1559 return obj;
1560 }
1561
1562 void JvmtiExport::post_field_modification_by_jni(JavaThread *thread, oop obj,
1563 Klass* klass, jfieldID fieldID, bool is_static,
1564 char sig_type, jvalue *value) {
1565 // We must be called with a Java context in order to provide reasonable
1566 // values for the klazz, method, and location fields. The callers of this
1567 // function don't make the call unless there is a Java context.
1568 assert(thread->has_last_Java_frame(), "must be called with Java context");
1569
1570 ResourceMark rm;
1571 fieldDescriptor fd;
1572 // if get_field_descriptor finds fieldID to be invalid, then we just bail
1573 bool valid_fieldID = JvmtiEnv::get_field_descriptor(klass, fieldID, &fd);
1574 assert(valid_fieldID == true,"post_field_modification_by_jni called with invalid fieldID");
1575 if (!valid_fieldID) return;
1576 // field modifications are not watched so bail
1577 if (!fd.is_field_modification_watched()) return;
1578
1579 HandleMark hm(thread);
1580
1581 Handle h_obj;
1582 if (!is_static) {
1583 // non-static field accessors have an object, but we need a handle
1584 assert(obj != NULL, "non-static needs an object");
1585 h_obj = Handle(thread, obj);
1586 }
1587 KlassHandle h_klass(thread, klass);
1588 post_field_modification(thread,
1589 thread->last_frame().interpreter_frame_method(),
1590 thread->last_frame().interpreter_frame_bcp(),
1591 h_klass, h_obj, fieldID, sig_type, value);
1592 }
1593
1594 void JvmtiExport::post_raw_field_modification(JavaThread *thread, Method* method,
1595 address location, KlassHandle field_klass, Handle object, jfieldID field,
1596 char sig_type, jvalue *value) {
1597
1598 if (sig_type == 'I' || sig_type == 'Z' || sig_type == 'B' || sig_type == 'C' || sig_type == 'S') {
1599 // 'I' instructions are used for byte, char, short and int.
1600 // determine which it really is, and convert
1601 fieldDescriptor fd;
1602 bool found = JvmtiEnv::get_field_descriptor(field_klass(), field, &fd);
1603 // should be found (if not, leave as is)
1604 if (found) {
1605 jint ival = value->i;
1606 // convert value from int to appropriate type
1607 switch (fd.field_type()) {
1608 case T_BOOLEAN:
1609 sig_type = 'Z';
1610 value->i = 0; // clear it
1611 value->z = (jboolean)ival;
1612 break;
1613 case T_BYTE:
1614 sig_type = 'B';
1615 value->i = 0; // clear it
1616 value->b = (jbyte)ival;
1617 break;
1618 case T_CHAR:
1619 sig_type = 'C';
1620 value->i = 0; // clear it
1621 value->c = (jchar)ival;
1622 break;
1623 case T_SHORT:
1624 sig_type = 'S';
1625 value->i = 0; // clear it
1626 value->s = (jshort)ival;
1627 break;
1628 case T_INT:
1629 // nothing to do
1630 break;
1631 default:
1632 // this is an integer instruction, should be one of above
1633 ShouldNotReachHere();
1634 break;
1635 }
1636 }
1637 }
1638
1639 assert(sig_type != '[', "array should have sig_type == 'L'");
1640 bool handle_created = false;
1641
1642 // convert oop to JNI handle.
1643 if (sig_type == 'L') {
1644 handle_created = true;
1645 value->l = (jobject)JNIHandles::make_local(thread, (oop)value->l);
1646 }
1647
1648 post_field_modification(thread, method, location, field_klass, object, field, sig_type, value);
1649
1650 // Destroy the JNI handle allocated above.
1651 if (handle_created) {
1652 JNIHandles::destroy_local(value->l);
1653 }
1654 }
1655
1656 void JvmtiExport::post_field_modification(JavaThread *thread, Method* method,
1657 address location, KlassHandle field_klass, Handle object, jfieldID field,
1658 char sig_type, jvalue *value_ptr) {
1659
1660 HandleMark hm(thread);
1661 methodHandle mh(thread, method);
1662
1663 JvmtiThreadState *state = thread->jvmti_thread_state();
1664 if (state == NULL) {
1665 return;
1666 }
1667 EVT_TRIG_TRACE(JVMTI_EVENT_FIELD_MODIFICATION,
1668 ("JVMTI [%s] Trg Field Modification event triggered",
1669 JvmtiTrace::safe_get_thread_name(thread)));
1670
1671 JvmtiEnvThreadStateIterator it(state);
1672 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1673 if (ets->is_enabled(JVMTI_EVENT_FIELD_MODIFICATION)) {
1674 EVT_TRACE(JVMTI_EVENT_FIELD_MODIFICATION,
1675 ("JVMTI [%s] Evt Field Modification event sent %s.%s @ %d",
1676 JvmtiTrace::safe_get_thread_name(thread),
1677 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1678 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1679 location - mh()->code_base() ));
1680
1681 JvmtiEnv *env = ets->get_env();
1682 JvmtiLocationEventMark jem(thread, mh, location);
1683 jclass field_jclass = jem.to_jclass(field_klass());
1684 jobject field_jobject = jem.to_jobject(object());
1685 JvmtiJavaThreadEventTransition jet(thread);
1686 jvmtiEventFieldModification callback = env->callbacks()->FieldModification;
1687 if (callback != NULL) {
1688 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1689 jem.jni_methodID(), jem.location(),
1690 field_jclass, field_jobject, field, sig_type, *value_ptr);
1691 }
1692 }
1693 }
1694 }
1695
1696 void JvmtiExport::post_native_method_bind(Method* method, address* function_ptr) {
1697 JavaThread* thread = JavaThread::current();
1698 assert(thread->thread_state() == _thread_in_vm, "must be in vm state");
1699
1700 HandleMark hm(thread);
1701 methodHandle mh(thread, method);
1702
1703 EVT_TRIG_TRACE(JVMTI_EVENT_NATIVE_METHOD_BIND, ("JVMTI [%s] Trg Native Method Bind event triggered",
1704 JvmtiTrace::safe_get_thread_name(thread)));
1705
1706 if (JvmtiEventController::is_enabled(JVMTI_EVENT_NATIVE_METHOD_BIND)) {
1707 JvmtiEnvIterator it;
1708 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1709 if (env->is_enabled(JVMTI_EVENT_NATIVE_METHOD_BIND)) {
1710 EVT_TRACE(JVMTI_EVENT_NATIVE_METHOD_BIND, ("JVMTI [%s] Evt Native Method Bind event sent",
1711 JvmtiTrace::safe_get_thread_name(thread) ));
1712
1713 JvmtiMethodEventMark jem(thread, mh);
1714 JvmtiJavaThreadEventTransition jet(thread);
1715 JNIEnv* jni_env = JvmtiEnv::get_phase() == JVMTI_PHASE_PRIMORDIAL? NULL : jem.jni_env();
1716 jvmtiEventNativeMethodBind callback = env->callbacks()->NativeMethodBind;
1717 if (callback != NULL) {
1718 (*callback)(env->jvmti_external(), jni_env, jem.jni_thread(),
1719 jem.jni_methodID(), (void*)(*function_ptr), (void**)function_ptr);
1720 }
1721 }
1722 }
1723 }
1724 }
1725
1726 // Returns a record containing inlining information for the given nmethod
1727 jvmtiCompiledMethodLoadInlineRecord* create_inline_record(nmethod* nm) {
1728 jint numstackframes = 0;
1729 jvmtiCompiledMethodLoadInlineRecord* record = (jvmtiCompiledMethodLoadInlineRecord*)NEW_RESOURCE_OBJ(jvmtiCompiledMethodLoadInlineRecord);
1730 record->header.kind = JVMTI_CMLR_INLINE_INFO;
1731 record->header.next = NULL;
1732 record->header.majorinfoversion = JVMTI_CMLR_MAJOR_VERSION_1;
1733 record->header.minorinfoversion = JVMTI_CMLR_MINOR_VERSION_0;
1734 record->numpcs = 0;
1735 for(PcDesc* p = nm->scopes_pcs_begin(); p < nm->scopes_pcs_end(); p++) {
1736 if(p->scope_decode_offset() == DebugInformationRecorder::serialized_null) continue;
1737 record->numpcs++;
1738 }
1739 record->pcinfo = (PCStackInfo*)(NEW_RESOURCE_ARRAY(PCStackInfo, record->numpcs));
1740 int scope = 0;
1741 for(PcDesc* p = nm->scopes_pcs_begin(); p < nm->scopes_pcs_end(); p++) {
1742 if(p->scope_decode_offset() == DebugInformationRecorder::serialized_null) continue;
1743 void* pc_address = (void*)p->real_pc(nm);
1744 assert(pc_address != NULL, "pc_address must be non-null");
1745 record->pcinfo[scope].pc = pc_address;
1746 numstackframes=0;
1747 for(ScopeDesc* sd = nm->scope_desc_at(p->real_pc(nm));sd != NULL;sd = sd->sender()) {
1748 numstackframes++;
1749 }
1750 assert(numstackframes != 0, "numstackframes must be nonzero.");
1751 record->pcinfo[scope].methods = (jmethodID *)NEW_RESOURCE_ARRAY(jmethodID, numstackframes);
1752 record->pcinfo[scope].bcis = (jint *)NEW_RESOURCE_ARRAY(jint, numstackframes);
1753 record->pcinfo[scope].numstackframes = numstackframes;
1754 int stackframe = 0;
1755 for(ScopeDesc* sd = nm->scope_desc_at(p->real_pc(nm));sd != NULL;sd = sd->sender()) {
1756 // 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()
1757 assert(sd->method() != NULL, "sd->method() cannot be null.");
1758 record->pcinfo[scope].methods[stackframe] = sd->method()->jmethod_id();
1759 record->pcinfo[scope].bcis[stackframe] = sd->bci();
1760 stackframe++;
1761 }
1762 scope++;
1763 }
1764 return record;
1765 }
1766
1767 void JvmtiExport::post_compiled_method_load(nmethod *nm) {
1768 JavaThread* thread = JavaThread::current();
1769
1770 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
1771 ("JVMTI [%s] method compile load event triggered",
1772 JvmtiTrace::safe_get_thread_name(thread)));
1773
1774 JvmtiEnvIterator it;
1775 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1776 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_LOAD)) {
1777
1778 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
1779 ("JVMTI [%s] class compile method load event sent %s.%s ",
1780 JvmtiTrace::safe_get_thread_name(thread),
1781 (nm->method() == NULL) ? "NULL" : nm->method()->klass_name()->as_C_string(),
1782 (nm->method() == NULL) ? "NULL" : nm->method()->name()->as_C_string()));
1783 ResourceMark rm(thread);
1784 HandleMark hm(thread);
1785
1786 // Add inlining information
1787 jvmtiCompiledMethodLoadInlineRecord* inlinerecord = create_inline_record(nm);
1788 // Pass inlining information through the void pointer
1789 JvmtiCompiledMethodLoadEventMark jem(thread, nm, inlinerecord);
1790 JvmtiJavaThreadEventTransition jet(thread);
1791 jvmtiEventCompiledMethodLoad callback = env->callbacks()->CompiledMethodLoad;
1792 if (callback != NULL) {
1793 (*callback)(env->jvmti_external(), jem.jni_methodID(),
1794 jem.code_size(), jem.code_data(), jem.map_length(),
1795 jem.map(), jem.compile_info());
1796 }
1797 }
1798 }
1799 }
1800
1801
1802 // post a COMPILED_METHOD_LOAD event for a given environment
1803 void JvmtiExport::post_compiled_method_load(JvmtiEnv* env, const jmethodID method, const jint length,
1804 const void *code_begin, const jint map_length,
1805 const jvmtiAddrLocationMap* map)
1806 {
1807 JavaThread* thread = JavaThread::current();
1808 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
1809 ("JVMTI [%s] method compile load event triggered (by GenerateEvents)",
1810 JvmtiTrace::safe_get_thread_name(thread)));
1811 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_LOAD)) {
1812
1813 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
1814 ("JVMTI [%s] class compile method load event sent (by GenerateEvents), jmethodID=" PTR_FORMAT,
1815 JvmtiTrace::safe_get_thread_name(thread), method));
1816
1817 JvmtiEventMark jem(thread);
1818 JvmtiJavaThreadEventTransition jet(thread);
1819 jvmtiEventCompiledMethodLoad callback = env->callbacks()->CompiledMethodLoad;
1820 if (callback != NULL) {
1821 (*callback)(env->jvmti_external(), method,
1822 length, code_begin, map_length,
1823 map, NULL);
1824 }
1825 }
1826 }
1827
1828 void JvmtiExport::post_dynamic_code_generated_internal(const char *name, const void *code_begin, const void *code_end) {
1829 assert(name != NULL && name[0] != '\0', "sanity check");
1830
1831 JavaThread* thread = JavaThread::current();
1832 // In theory everyone coming thru here is in_vm but we need to be certain
1833 // because a callee will do a vm->native transition
1834 ThreadInVMfromUnknown __tiv;
1835
1836 EVT_TRIG_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED,
1837 ("JVMTI [%s] method dynamic code generated event triggered",
1838 JvmtiTrace::safe_get_thread_name(thread)));
1839 JvmtiEnvIterator it;
1840 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1841 if (env->is_enabled(JVMTI_EVENT_DYNAMIC_CODE_GENERATED)) {
1842 EVT_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED,
1843 ("JVMTI [%s] dynamic code generated event sent for %s",
1844 JvmtiTrace::safe_get_thread_name(thread), name));
1845 JvmtiEventMark jem(thread);
1846 JvmtiJavaThreadEventTransition jet(thread);
1847 jint length = (jint)pointer_delta(code_end, code_begin, sizeof(char));
1848 jvmtiEventDynamicCodeGenerated callback = env->callbacks()->DynamicCodeGenerated;
1849 if (callback != NULL) {
1850 (*callback)(env->jvmti_external(), name, (void*)code_begin, length);
1851 }
1852 }
1853 }
1854 }
1855
1856 void JvmtiExport::post_dynamic_code_generated(const char *name, const void *code_begin, const void *code_end) {
1857 jvmtiPhase phase = JvmtiEnv::get_phase();
1858 if (phase == JVMTI_PHASE_PRIMORDIAL || phase == JVMTI_PHASE_START) {
1859 post_dynamic_code_generated_internal(name, code_begin, code_end);
1860 } else {
1861 // It may not be safe to post the event from this thread. Defer all
1862 // postings to the service thread so that it can perform them in a safe
1863 // context and in-order.
1864 MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag);
1865 JvmtiDeferredEvent event = JvmtiDeferredEvent::dynamic_code_generated_event(
1866 name, code_begin, code_end);
1867 JvmtiDeferredEventQueue::enqueue(event);
1868 }
1869 }
1870
1871
1872 // post a DYNAMIC_CODE_GENERATED event for a given environment
1873 // used by GenerateEvents
1874 void JvmtiExport::post_dynamic_code_generated(JvmtiEnv* env, const char *name,
1875 const void *code_begin, const void *code_end)
1876 {
1877 JavaThread* thread = JavaThread::current();
1878 EVT_TRIG_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED,
1879 ("JVMTI [%s] dynamic code generated event triggered (by GenerateEvents)",
1880 JvmtiTrace::safe_get_thread_name(thread)));
1881 if (env->is_enabled(JVMTI_EVENT_DYNAMIC_CODE_GENERATED)) {
1882 EVT_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED,
1883 ("JVMTI [%s] dynamic code generated event sent for %s",
1884 JvmtiTrace::safe_get_thread_name(thread), name));
1885 JvmtiEventMark jem(thread);
1886 JvmtiJavaThreadEventTransition jet(thread);
1887 jint length = (jint)pointer_delta(code_end, code_begin, sizeof(char));
1888 jvmtiEventDynamicCodeGenerated callback = env->callbacks()->DynamicCodeGenerated;
1889 if (callback != NULL) {
1890 (*callback)(env->jvmti_external(), name, (void*)code_begin, length);
1891 }
1892 }
1893 }
1894
1895 // post a DynamicCodeGenerated event while holding locks in the VM.
1896 void JvmtiExport::post_dynamic_code_generated_while_holding_locks(const char* name,
1897 address code_begin, address code_end)
1898 {
1899 // register the stub with the current dynamic code event collector
1900 JvmtiThreadState* state = JvmtiThreadState::state_for(JavaThread::current());
1901 // state can only be NULL if the current thread is exiting which
1902 // should not happen since we're trying to post an event
1903 guarantee(state != NULL, "attempt to register stub via an exiting thread");
1904 JvmtiDynamicCodeEventCollector* collector = state->get_dynamic_code_event_collector();
1905 guarantee(collector != NULL, "attempt to register stub without event collector");
1906 collector->register_stub(name, code_begin, code_end);
1907 }
1908
1909 // Collect all the vm internally allocated objects which are visible to java world
1910 void JvmtiExport::record_vm_internal_object_allocation(oop obj) {
1911 Thread* thread = ThreadLocalStorage::thread();
1912 if (thread != NULL && thread->is_Java_thread()) {
1913 // Can not take safepoint here.
1914 No_Safepoint_Verifier no_sfpt;
1915 // Can not take safepoint here so can not use state_for to get
1916 // jvmti thread state.
1917 JvmtiThreadState *state = ((JavaThread*)thread)->jvmti_thread_state();
1918 if (state != NULL ) {
1919 // state is non NULL when VMObjectAllocEventCollector is enabled.
1920 JvmtiVMObjectAllocEventCollector *collector;
1921 collector = state->get_vm_object_alloc_event_collector();
1922 if (collector != NULL && collector->is_enabled()) {
1923 // Don't record classes as these will be notified via the ClassLoad
1924 // event.
1925 if (obj->klass() != SystemDictionary::Class_klass()) {
1926 collector->record_allocation(obj);
1927 }
1928 }
1929 }
1930 }
1931 }
1932
1933 void JvmtiExport::post_garbage_collection_finish() {
1934 Thread *thread = Thread::current(); // this event is posted from VM-Thread.
1935 EVT_TRIG_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH,
1936 ("JVMTI [%s] garbage collection finish event triggered",
1937 JvmtiTrace::safe_get_thread_name(thread)));
1938 JvmtiEnvIterator it;
1939 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1940 if (env->is_enabled(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH)) {
1941 EVT_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH,
1942 ("JVMTI [%s] garbage collection finish event sent ",
1943 JvmtiTrace::safe_get_thread_name(thread)));
1944 JvmtiThreadEventTransition jet(thread);
1945 // JNIEnv is NULL here because this event is posted from VM Thread
1946 jvmtiEventGarbageCollectionFinish callback = env->callbacks()->GarbageCollectionFinish;
1947 if (callback != NULL) {
1948 (*callback)(env->jvmti_external());
1949 }
1950 }
1951 }
1952 }
1953
1954 void JvmtiExport::post_garbage_collection_start() {
1955 Thread* thread = Thread::current(); // this event is posted from vm-thread.
1956 EVT_TRIG_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_START,
1957 ("JVMTI [%s] garbage collection start event triggered",
1958 JvmtiTrace::safe_get_thread_name(thread)));
1959 JvmtiEnvIterator it;
1960 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1961 if (env->is_enabled(JVMTI_EVENT_GARBAGE_COLLECTION_START)) {
1962 EVT_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_START,
1963 ("JVMTI [%s] garbage collection start event sent ",
1964 JvmtiTrace::safe_get_thread_name(thread)));
1965 JvmtiThreadEventTransition jet(thread);
1966 // JNIEnv is NULL here because this event is posted from VM Thread
1967 jvmtiEventGarbageCollectionStart callback = env->callbacks()->GarbageCollectionStart;
1968 if (callback != NULL) {
1969 (*callback)(env->jvmti_external());
1970 }
1971 }
1972 }
1973 }
1974
1975 void JvmtiExport::post_data_dump() {
1976 Thread *thread = Thread::current();
1977 EVT_TRIG_TRACE(JVMTI_EVENT_DATA_DUMP_REQUEST,
1978 ("JVMTI [%s] data dump request event triggered",
1979 JvmtiTrace::safe_get_thread_name(thread)));
1980 JvmtiEnvIterator it;
1981 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1982 if (env->is_enabled(JVMTI_EVENT_DATA_DUMP_REQUEST)) {
1983 EVT_TRACE(JVMTI_EVENT_DATA_DUMP_REQUEST,
1984 ("JVMTI [%s] data dump request event sent ",
1985 JvmtiTrace::safe_get_thread_name(thread)));
1986 JvmtiThreadEventTransition jet(thread);
1987 // JNIEnv is NULL here because this event is posted from VM Thread
1988 jvmtiEventDataDumpRequest callback = env->callbacks()->DataDumpRequest;
1989 if (callback != NULL) {
1990 (*callback)(env->jvmti_external());
1991 }
1992 }
1993 }
1994 }
1995
1996 void JvmtiExport::post_monitor_contended_enter(JavaThread *thread, ObjectMonitor *obj_mntr) {
1997 oop object = (oop)obj_mntr->object();
1998 if (!ServiceUtil::visible_oop(object)) {
1999 // Ignore monitor contended enter for vm internal object.
2000 return;
2001 }
2002 JvmtiThreadState *state = thread->jvmti_thread_state();
2003 if (state == NULL) {
2004 return;
2005 }
2006
2007 HandleMark hm(thread);
2008 Handle h(thread, object);
2009
2010 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTER,
2011 ("JVMTI [%s] montior contended enter event triggered",
2012 JvmtiTrace::safe_get_thread_name(thread)));
2013
2014 JvmtiEnvThreadStateIterator it(state);
2015 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
2016 if (ets->is_enabled(JVMTI_EVENT_MONITOR_CONTENDED_ENTER)) {
2017 EVT_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTER,
2018 ("JVMTI [%s] monitor contended enter event sent",
2019 JvmtiTrace::safe_get_thread_name(thread)));
2020 JvmtiMonitorEventMark jem(thread, h());
2021 JvmtiEnv *env = ets->get_env();
2022 JvmtiThreadEventTransition jet(thread);
2023 jvmtiEventMonitorContendedEnter callback = env->callbacks()->MonitorContendedEnter;
2024 if (callback != NULL) {
2025 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_object());
2026 }
2027 }
2028 }
2029 }
2030
2031 void JvmtiExport::post_monitor_contended_entered(JavaThread *thread, ObjectMonitor *obj_mntr) {
2032 oop object = (oop)obj_mntr->object();
2033 if (!ServiceUtil::visible_oop(object)) {
2034 // Ignore monitor contended entered for vm internal object.
2035 return;
2036 }
2037 JvmtiThreadState *state = thread->jvmti_thread_state();
2038 if (state == NULL) {
2039 return;
2040 }
2041
2042 HandleMark hm(thread);
2043 Handle h(thread, object);
2044
2045 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED,
2046 ("JVMTI [%s] montior contended entered event triggered",
2047 JvmtiTrace::safe_get_thread_name(thread)));
2048
2049 JvmtiEnvThreadStateIterator it(state);
2050 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
2051 if (ets->is_enabled(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED)) {
2052 EVT_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED,
2053 ("JVMTI [%s] monitor contended enter event sent",
2054 JvmtiTrace::safe_get_thread_name(thread)));
2055 JvmtiMonitorEventMark jem(thread, h());
2056 JvmtiEnv *env = ets->get_env();
2057 JvmtiThreadEventTransition jet(thread);
2058 jvmtiEventMonitorContendedEntered callback = env->callbacks()->MonitorContendedEntered;
2059 if (callback != NULL) {
2060 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_object());
2061 }
2062 }
2063 }
2064 }
2065
2066 void JvmtiExport::post_monitor_wait(JavaThread *thread, oop object,
2067 jlong timeout) {
2068 JvmtiThreadState *state = thread->jvmti_thread_state();
2069 if (state == NULL) {
2070 return;
2071 }
2072
2073 HandleMark hm(thread);
2074 Handle h(thread, object);
2075
2076 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_WAIT,
2077 ("JVMTI [%s] montior wait event triggered",
2078 JvmtiTrace::safe_get_thread_name(thread)));
2079
2080 JvmtiEnvThreadStateIterator it(state);
2081 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
2082 if (ets->is_enabled(JVMTI_EVENT_MONITOR_WAIT)) {
2083 EVT_TRACE(JVMTI_EVENT_MONITOR_WAIT,
2084 ("JVMTI [%s] monitor wait event sent ",
2085 JvmtiTrace::safe_get_thread_name(thread)));
2086 JvmtiMonitorEventMark jem(thread, h());
2087 JvmtiEnv *env = ets->get_env();
2088 JvmtiThreadEventTransition jet(thread);
2089 jvmtiEventMonitorWait callback = env->callbacks()->MonitorWait;
2090 if (callback != NULL) {
2091 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
2092 jem.jni_object(), timeout);
2093 }
2094 }
2095 }
2096 }
2097
2098 void JvmtiExport::post_monitor_waited(JavaThread *thread, ObjectMonitor *obj_mntr, jboolean timed_out) {
2099 oop object = (oop)obj_mntr->object();
2100 if (!ServiceUtil::visible_oop(object)) {
2101 // Ignore monitor waited for vm internal object.
2102 return;
2103 }
2104 JvmtiThreadState *state = thread->jvmti_thread_state();
2105 if (state == NULL) {
2106 return;
2107 }
2108
2109 HandleMark hm(thread);
2110 Handle h(thread, object);
2111
2112 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_WAITED,
2113 ("JVMTI [%s] montior waited event triggered",
2114 JvmtiTrace::safe_get_thread_name(thread)));
2115
2116 JvmtiEnvThreadStateIterator it(state);
2117 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
2118 if (ets->is_enabled(JVMTI_EVENT_MONITOR_WAITED)) {
2119 EVT_TRACE(JVMTI_EVENT_MONITOR_WAITED,
2120 ("JVMTI [%s] monitor waited event sent ",
2121 JvmtiTrace::safe_get_thread_name(thread)));
2122 JvmtiMonitorEventMark jem(thread, h());
2123 JvmtiEnv *env = ets->get_env();
2124 JvmtiThreadEventTransition jet(thread);
2125 jvmtiEventMonitorWaited callback = env->callbacks()->MonitorWaited;
2126 if (callback != NULL) {
2127 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
2128 jem.jni_object(), timed_out);
2129 }
2130 }
2131 }
2132 }
2133
2134
2135 void JvmtiExport::post_vm_object_alloc(JavaThread *thread, oop object) {
2136 EVT_TRIG_TRACE(JVMTI_EVENT_VM_OBJECT_ALLOC, ("JVMTI [%s] Trg vm object alloc triggered",
2137 JvmtiTrace::safe_get_thread_name(thread)));
2138 if (object == NULL) {
2139 return;
2140 }
2141 HandleMark hm(thread);
2142 Handle h(thread, object);
2143 JvmtiEnvIterator it;
2144 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
2145 if (env->is_enabled(JVMTI_EVENT_VM_OBJECT_ALLOC)) {
2146 EVT_TRACE(JVMTI_EVENT_VM_OBJECT_ALLOC, ("JVMTI [%s] Evt vmobject alloc sent %s",
2147 JvmtiTrace::safe_get_thread_name(thread),
2148 object==NULL? "NULL" : java_lang_Class::as_Klass(object)->external_name()));
2149
2150 JvmtiVMObjectAllocEventMark jem(thread, h());
2151 JvmtiJavaThreadEventTransition jet(thread);
2152 jvmtiEventVMObjectAlloc callback = env->callbacks()->VMObjectAlloc;
2153 if (callback != NULL) {
2154 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
2155 jem.jni_jobject(), jem.jni_class(), jem.size());
2156 }
2157 }
2158 }
2159 }
2160
2161 ////////////////////////////////////////////////////////////////////////////////////////////////
2162
2163 void JvmtiExport::cleanup_thread(JavaThread* thread) {
2164 assert(JavaThread::current() == thread, "thread is not current");
2165 MutexLocker mu(JvmtiThreadState_lock);
2166
2167 if (thread->jvmti_thread_state() != NULL) {
2168 // This has to happen after the thread state is removed, which is
2169 // why it is not in post_thread_end_event like its complement
2170 // Maybe both these functions should be rolled into the posts?
2171 JvmtiEventController::thread_ended(thread);
2172 }
2173 }
2174
2175 void JvmtiExport::clear_detected_exception(JavaThread* thread) {
2176 assert(JavaThread::current() == thread, "thread is not current");
2177
2178 JvmtiThreadState* state = thread->jvmti_thread_state();
2179 if (state != NULL) {
2180 state->clear_exception_detected();
2181 }
2182 }
2183
2184 void JvmtiExport::oops_do(OopClosure* f) {
2185 JvmtiCurrentBreakpoints::oops_do(f);
2186 JvmtiVMObjectAllocEventCollector::oops_do_for_all_threads(f);
2187 }
2188
2189 void JvmtiExport::weak_oops_do(BoolObjectClosure* is_alive, OopClosure* f) {
2190 JvmtiTagMap::weak_oops_do(is_alive, f);
2191 }
2192
2193 void JvmtiExport::gc_epilogue() {
2194 JvmtiCurrentBreakpoints::gc_epilogue();
2195 }
2196
2197 // Onload raw monitor transition.
2198 void JvmtiExport::transition_pending_onload_raw_monitors() {
2199 JvmtiPendingMonitors::transition_raw_monitors();
2200 }
2201
2202 ////////////////////////////////////////////////////////////////////////////////////////////////
2203
2204 // type for the Agent_OnAttach entry point
2205 extern "C" {
2206 typedef jint (JNICALL *OnAttachEntry_t)(JavaVM*, char *, void *);
2207 }
2208
2209 jint JvmtiExport::load_agent_library(AttachOperation* op, outputStream* st) {
2210 char ebuf[1024];
2211 char buffer[JVM_MAXPATHLEN];
2212 void* library = NULL;
2213 jint result = JNI_ERR;
2214 const char *on_attach_symbols[] = AGENT_ONATTACH_SYMBOLS;
2215 size_t num_symbol_entries = ARRAY_SIZE(on_attach_symbols);
2216
2217 // get agent name and options
2218 const char* agent = op->arg(0);
2219 const char* absParam = op->arg(1);
2220 const char* options = op->arg(2);
2221
2222 // The abs paramter should be "true" or "false"
2223 bool is_absolute_path = (absParam != NULL) && (strcmp(absParam,"true")==0);
2224
2225 // Initially marked as invalid. It will be set to valid if we can find the agent
2226 AgentLibrary *agent_lib = new AgentLibrary(agent, options, is_absolute_path, NULL);
2227
2228 // Check for statically linked in agent. If not found then if the path is
2229 // absolute we attempt to load the library. Otherwise we try to load it
2230 // from the standard dll directory.
2231
2232 if (!os::find_builtin_agent(agent_lib, on_attach_symbols, num_symbol_entries)) {
2233 if (is_absolute_path) {
2234 library = os::dll_load(agent, ebuf, sizeof ebuf);
2235 } else {
2236 // Try to load the agent from the standard dll directory
2237 if (os::dll_build_name(buffer, sizeof(buffer), Arguments::get_dll_dir(),
2238 agent)) {
2239 library = os::dll_load(buffer, ebuf, sizeof ebuf);
2240 }
2241 if (library == NULL) {
2242 // not found - try local path
2243 char ns[1] = {0};
2244 if (os::dll_build_name(buffer, sizeof(buffer), ns, agent)) {
2245 library = os::dll_load(buffer, ebuf, sizeof ebuf);
2246 }
2247 }
2248 }
2249 if (library != NULL) {
2250 agent_lib->set_os_lib(library);
2251 agent_lib->set_valid();
2252 }
2253 }
2254 // If the library was loaded then we attempt to invoke the Agent_OnAttach
2255 // function
2256 if (agent_lib->valid()) {
2257 // Lookup the Agent_OnAttach function
2258 OnAttachEntry_t on_attach_entry = NULL;
2259 on_attach_entry = CAST_TO_FN_PTR(OnAttachEntry_t,
2260 os::find_agent_function(agent_lib, false, on_attach_symbols, num_symbol_entries));
2261 if (on_attach_entry == NULL) {
2262 // Agent_OnAttach missing - unload library
2263 if (!agent_lib->is_static_lib()) {
2264 os::dll_unload(library);
2265 }
2266 delete agent_lib;
2267 } else {
2268 // Invoke the Agent_OnAttach function
2269 JavaThread* THREAD = JavaThread::current();
2270 {
2271 extern struct JavaVM_ main_vm;
2272 JvmtiThreadEventMark jem(THREAD);
2273 JvmtiJavaThreadEventTransition jet(THREAD);
2274
2275 result = (*on_attach_entry)(&main_vm, (char*)options, NULL);
2276 }
2277
2278 // Agent_OnAttach may have used JNI
2279 if (HAS_PENDING_EXCEPTION) {
2280 CLEAR_PENDING_EXCEPTION;
2281 }
2282
2283 // If OnAttach returns JNI_OK then we add it to the list of
2284 // agent libraries so that we can call Agent_OnUnload later.
2285 if (result == JNI_OK) {
2286 Arguments::add_loaded_agent(agent_lib);
2287 } else {
2288 delete agent_lib;
2289 }
2290
2291 // Agent_OnAttach executed so completion status is JNI_OK
2292 st->print_cr("%d", result);
2293 result = JNI_OK;
2294 }
2295 }
2296 return result;
2297 }
2298
2299 ////////////////////////////////////////////////////////////////////////////////////////////////
2300
2301 // Setup current current thread for event collection.
2302 void JvmtiEventCollector::setup_jvmti_thread_state() {
2303 // set this event collector to be the current one.
2304 JvmtiThreadState* state = JvmtiThreadState::state_for(JavaThread::current());
2305 // state can only be NULL if the current thread is exiting which
2306 // should not happen since we're trying to configure for event collection
2307 guarantee(state != NULL, "exiting thread called setup_jvmti_thread_state");
2308 if (is_vm_object_alloc_event()) {
2309 _prev = state->get_vm_object_alloc_event_collector();
2310 state->set_vm_object_alloc_event_collector((JvmtiVMObjectAllocEventCollector *)this);
2311 } else if (is_dynamic_code_event()) {
2312 _prev = state->get_dynamic_code_event_collector();
2313 state->set_dynamic_code_event_collector((JvmtiDynamicCodeEventCollector *)this);
2314 }
2315 }
2316
2317 // Unset current event collection in this thread and reset it with previous
2318 // collector.
2319 void JvmtiEventCollector::unset_jvmti_thread_state() {
2320 JvmtiThreadState* state = JavaThread::current()->jvmti_thread_state();
2321 if (state != NULL) {
2322 // restore the previous event collector (if any)
2323 if (is_vm_object_alloc_event()) {
2324 if (state->get_vm_object_alloc_event_collector() == this) {
2325 state->set_vm_object_alloc_event_collector((JvmtiVMObjectAllocEventCollector *)_prev);
2326 } else {
2327 // this thread's jvmti state was created during the scope of
2328 // the event collector.
2329 }
2330 } else {
2331 if (is_dynamic_code_event()) {
2332 if (state->get_dynamic_code_event_collector() == this) {
2333 state->set_dynamic_code_event_collector((JvmtiDynamicCodeEventCollector *)_prev);
2334 } else {
2335 // this thread's jvmti state was created during the scope of
2336 // the event collector.
2337 }
2338 }
2339 }
2340 }
2341 }
2342
2343 // create the dynamic code event collector
2344 JvmtiDynamicCodeEventCollector::JvmtiDynamicCodeEventCollector() : _code_blobs(NULL) {
2345 if (JvmtiExport::should_post_dynamic_code_generated()) {
2346 setup_jvmti_thread_state();
2347 }
2348 }
2349
2350 // iterate over any code blob descriptors collected and post a
2351 // DYNAMIC_CODE_GENERATED event to the profiler.
2352 JvmtiDynamicCodeEventCollector::~JvmtiDynamicCodeEventCollector() {
2353 assert(!JavaThread::current()->owns_locks(), "all locks must be released to post deferred events");
2354 // iterate over any code blob descriptors that we collected
2355 if (_code_blobs != NULL) {
2356 for (int i=0; i<_code_blobs->length(); i++) {
2357 JvmtiCodeBlobDesc* blob = _code_blobs->at(i);
2358 JvmtiExport::post_dynamic_code_generated(blob->name(), blob->code_begin(), blob->code_end());
2359 FreeHeap(blob);
2360 }
2361 delete _code_blobs;
2362 }
2363 unset_jvmti_thread_state();
2364 }
2365
2366 // register a stub
2367 void JvmtiDynamicCodeEventCollector::register_stub(const char* name, address start, address end) {
2368 if (_code_blobs == NULL) {
2369 _code_blobs = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<JvmtiCodeBlobDesc*>(1,true);
2370 }
2371 _code_blobs->append(new JvmtiCodeBlobDesc(name, start, end));
2372 }
2373
2374 // Setup current thread to record vm allocated objects.
2375 JvmtiVMObjectAllocEventCollector::JvmtiVMObjectAllocEventCollector() : _allocated(NULL) {
2376 if (JvmtiExport::should_post_vm_object_alloc()) {
2377 _enable = true;
2378 setup_jvmti_thread_state();
2379 } else {
2380 _enable = false;
2381 }
2382 }
2383
2384 // Post vm_object_alloc event for vm allocated objects visible to java
2385 // world.
2386 JvmtiVMObjectAllocEventCollector::~JvmtiVMObjectAllocEventCollector() {
2387 if (_allocated != NULL) {
2388 set_enabled(false);
2389 for (int i = 0; i < _allocated->length(); i++) {
2390 oop obj = _allocated->at(i);
2391 if (ServiceUtil::visible_oop(obj)) {
2392 JvmtiExport::post_vm_object_alloc(JavaThread::current(), obj);
2393 }
2394 }
2395 delete _allocated;
2396 }
2397 unset_jvmti_thread_state();
2398 }
2399
2400 void JvmtiVMObjectAllocEventCollector::record_allocation(oop obj) {
2401 assert(is_enabled(), "VM object alloc event collector is not enabled");
2402 if (_allocated == NULL) {
2403 _allocated = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<oop>(1, true);
2404 }
2405 _allocated->push(obj);
2406 }
2407
2408 // GC support.
2409 void JvmtiVMObjectAllocEventCollector::oops_do(OopClosure* f) {
2410 if (_allocated != NULL) {
2411 for(int i=_allocated->length() - 1; i >= 0; i--) {
2412 if (_allocated->at(i) != NULL) {
2413 f->do_oop(_allocated->adr_at(i));
2414 }
2415 }
2416 }
2417 }
2418
2419 void JvmtiVMObjectAllocEventCollector::oops_do_for_all_threads(OopClosure* f) {
2420 // no-op if jvmti not enabled
2421 if (!JvmtiEnv::environments_might_exist()) {
2422 return;
2423 }
2424
2425 // Runs at safepoint. So no need to acquire Threads_lock.
2426 for (JavaThread *jthr = Threads::first(); jthr != NULL; jthr = jthr->next()) {
2427 JvmtiThreadState *state = jthr->jvmti_thread_state();
2428 if (state != NULL) {
2429 JvmtiVMObjectAllocEventCollector *collector;
2430 collector = state->get_vm_object_alloc_event_collector();
2431 while (collector != NULL) {
2432 collector->oops_do(f);
2433 collector = (JvmtiVMObjectAllocEventCollector *)collector->get_prev();
2434 }
2435 }
2436 }
2437 }
2438
2439
2440 // Disable collection of VMObjectAlloc events
2441 NoJvmtiVMObjectAllocMark::NoJvmtiVMObjectAllocMark() : _collector(NULL) {
2442 // a no-op if VMObjectAlloc event is not enabled
2443 if (!JvmtiExport::should_post_vm_object_alloc()) {
2444 return;
2445 }
2446 Thread* thread = ThreadLocalStorage::thread();
2447 if (thread != NULL && thread->is_Java_thread()) {
2448 JavaThread* current_thread = (JavaThread*)thread;
2449 JvmtiThreadState *state = current_thread->jvmti_thread_state();
2450 if (state != NULL) {
2451 JvmtiVMObjectAllocEventCollector *collector;
2452 collector = state->get_vm_object_alloc_event_collector();
2453 if (collector != NULL && collector->is_enabled()) {
2454 _collector = collector;
2455 _collector->set_enabled(false);
2456 }
2457 }
2458 }
2459 }
2460
2461 // Re-Enable collection of VMObjectAlloc events (if previously enabled)
2462 NoJvmtiVMObjectAllocMark::~NoJvmtiVMObjectAllocMark() {
2463 if (was_enabled()) {
2464 _collector->set_enabled(true);
2465 }
2466 };
2467
2468 JvmtiGCMarker::JvmtiGCMarker() {
2469 // if there aren't any JVMTI environments then nothing to do
2470 if (!JvmtiEnv::environments_might_exist()) {
2471 return;
2472 }
2473
2474 if (JvmtiExport::should_post_garbage_collection_start()) {
2475 JvmtiExport::post_garbage_collection_start();
2476 }
2477
2478 if (SafepointSynchronize::is_at_safepoint()) {
2479 // Do clean up tasks that need to be done at a safepoint
2480 JvmtiEnvBase::check_for_periodic_clean_up();
2481 }
2482 }
2483
2484 JvmtiGCMarker::~JvmtiGCMarker() {
2485 // if there aren't any JVMTI environments then nothing to do
2486 if (!JvmtiEnv::environments_might_exist()) {
2487 return;
2488 }
2489
2490 // JVMTI notify gc finish
2491 if (JvmtiExport::should_post_garbage_collection_finish()) {
2492 JvmtiExport::post_garbage_collection_finish();
2493 }
2494 }