Mercurial > hg > graal-compiler
annotate src/share/vm/prims/jvmtiExport.cpp @ 948:89e0543e1737
6884624: Update copyright year
Summary: Update copyright for files that have been modified in 2009 through Septermber
Reviewed-by: tbell, ohair
author | xdono |
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date | Tue, 22 Sep 2009 14:06:10 -0700 |
parents | 16c930df1e9b |
children | dcb15a6f342d 4ce7240d622c |
rev | line source |
---|---|
0 | 1 /* |
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2b4230d1e589
6862295: JDWP threadid changes during debugging session (leading to ingored breakpoints)
dcubed
parents:
342
diff
changeset
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2 * Copyright 2003-2009 Sun Microsystems, Inc. All Rights Reserved. |
0 | 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 # include "incls/_precompiled.incl" | |
26 # include "incls/_jvmtiExport.cpp.incl" | |
27 | |
28 #ifdef JVMTI_TRACE | |
29 #define EVT_TRACE(evt,out) if ((JvmtiTrace::event_trace_flags(evt) & JvmtiTrace::SHOW_EVENT_SENT) != 0) { SafeResourceMark rm; tty->print_cr out; } | |
30 #define EVT_TRIG_TRACE(evt,out) if ((JvmtiTrace::event_trace_flags(evt) & JvmtiTrace::SHOW_EVENT_TRIGGER) != 0) { SafeResourceMark rm; tty->print_cr out; } | |
31 #else | |
32 #define EVT_TRIG_TRACE(evt,out) | |
33 #define EVT_TRACE(evt,out) | |
34 #endif | |
35 | |
36 /////////////////////////////////////////////////////////////// | |
37 // | |
38 // JvmtiEventTransition | |
39 // | |
40 // TO DO -- | |
41 // more handle purging | |
42 | |
43 // Use this for JavaThreads and state is _thread_in_vm. | |
44 class JvmtiJavaThreadEventTransition : StackObj { | |
45 private: | |
46 ResourceMark _rm; | |
47 ThreadToNativeFromVM _transition; | |
48 HandleMark _hm; | |
49 | |
50 public: | |
51 JvmtiJavaThreadEventTransition(JavaThread *thread) : | |
52 _rm(), | |
53 _transition(thread), | |
54 _hm(thread) {}; | |
55 }; | |
56 | |
57 // For JavaThreads which are not in _thread_in_vm state | |
58 // and other system threads use this. | |
59 class JvmtiThreadEventTransition : StackObj { | |
60 private: | |
61 ResourceMark _rm; | |
62 HandleMark _hm; | |
63 JavaThreadState _saved_state; | |
64 JavaThread *_jthread; | |
65 | |
66 public: | |
67 JvmtiThreadEventTransition(Thread *thread) : _rm(), _hm() { | |
68 if (thread->is_Java_thread()) { | |
69 _jthread = (JavaThread *)thread; | |
70 _saved_state = _jthread->thread_state(); | |
71 if (_saved_state == _thread_in_Java) { | |
72 ThreadStateTransition::transition_from_java(_jthread, _thread_in_native); | |
73 } else { | |
74 ThreadStateTransition::transition(_jthread, _saved_state, _thread_in_native); | |
75 } | |
76 } else { | |
77 _jthread = NULL; | |
78 } | |
79 } | |
80 | |
81 ~JvmtiThreadEventTransition() { | |
82 if (_jthread != NULL) | |
83 ThreadStateTransition::transition_from_native(_jthread, _saved_state); | |
84 } | |
85 }; | |
86 | |
87 | |
88 /////////////////////////////////////////////////////////////// | |
89 // | |
90 // JvmtiEventMark | |
91 // | |
92 | |
93 class JvmtiEventMark : public StackObj { | |
94 private: | |
95 JavaThread *_thread; | |
96 JNIEnv* _jni_env; | |
97 bool _exception_detected; | |
98 bool _exception_caught; | |
99 #if 0 | |
100 JNIHandleBlock* _hblock; | |
101 #endif | |
102 | |
103 public: | |
104 JvmtiEventMark(JavaThread *thread) : _thread(thread), | |
105 _jni_env(thread->jni_environment()) { | |
106 #if 0 | |
107 _hblock = thread->active_handles(); | |
108 _hblock->clear_thoroughly(); // so we can be safe | |
109 #else | |
110 // we want to use the code above - but that needs the JNIHandle changes - later... | |
111 // for now, steal JNI push local frame code | |
112 JvmtiThreadState *state = thread->jvmti_thread_state(); | |
113 // we are before an event. | |
114 // Save current jvmti thread exception state. | |
115 if (state != NULL) { | |
116 _exception_detected = state->is_exception_detected(); | |
117 _exception_caught = state->is_exception_caught(); | |
118 } else { | |
119 _exception_detected = false; | |
120 _exception_caught = false; | |
121 } | |
122 | |
123 JNIHandleBlock* old_handles = thread->active_handles(); | |
124 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread); | |
125 assert(new_handles != NULL, "should not be NULL"); | |
126 new_handles->set_pop_frame_link(old_handles); | |
127 thread->set_active_handles(new_handles); | |
128 #endif | |
129 assert(thread == JavaThread::current(), "thread must be current!"); | |
130 thread->frame_anchor()->make_walkable(thread); | |
131 }; | |
132 | |
133 ~JvmtiEventMark() { | |
134 #if 0 | |
135 _hblock->clear(); // for consistency with future correct behavior | |
136 #else | |
137 // we want to use the code above - but that needs the JNIHandle changes - later... | |
138 // for now, steal JNI pop local frame code | |
139 JNIHandleBlock* old_handles = _thread->active_handles(); | |
140 JNIHandleBlock* new_handles = old_handles->pop_frame_link(); | |
141 assert(new_handles != NULL, "should not be NULL"); | |
142 _thread->set_active_handles(new_handles); | |
143 // Note that we set the pop_frame_link to NULL explicitly, otherwise | |
144 // the release_block call will release the blocks. | |
145 old_handles->set_pop_frame_link(NULL); | |
146 JNIHandleBlock::release_block(old_handles, _thread); // may block | |
147 #endif | |
148 | |
149 JvmtiThreadState* state = _thread->jvmti_thread_state(); | |
150 // we are continuing after an event. | |
151 if (state != NULL) { | |
152 // Restore the jvmti thread exception state. | |
153 if (_exception_detected) { | |
154 state->set_exception_detected(); | |
155 } | |
156 if (_exception_caught) { | |
157 state->set_exception_caught(); | |
158 } | |
159 } | |
160 } | |
161 | |
162 #if 0 | |
163 jobject to_jobject(oop obj) { return obj == NULL? NULL : _hblock->allocate_handle_fast(obj); } | |
164 #else | |
165 // we want to use the code above - but that needs the JNIHandle changes - later... | |
166 // for now, use regular make_local | |
167 jobject to_jobject(oop obj) { return JNIHandles::make_local(_thread,obj); } | |
168 #endif | |
169 | |
170 jclass to_jclass(klassOop klass) { return (klass == NULL ? NULL : (jclass)to_jobject(Klass::cast(klass)->java_mirror())); } | |
171 | |
172 jmethodID to_jmethodID(methodHandle method) { return method->jmethod_id(); } | |
173 | |
174 JNIEnv* jni_env() { return _jni_env; } | |
175 }; | |
176 | |
177 class JvmtiThreadEventMark : public JvmtiEventMark { | |
178 private: | |
179 jthread _jt; | |
180 | |
181 public: | |
182 JvmtiThreadEventMark(JavaThread *thread) : | |
183 JvmtiEventMark(thread) { | |
184 _jt = (jthread)(to_jobject(thread->threadObj())); | |
185 }; | |
186 jthread jni_thread() { return _jt; } | |
187 }; | |
188 | |
189 class JvmtiClassEventMark : public JvmtiThreadEventMark { | |
190 private: | |
191 jclass _jc; | |
192 | |
193 public: | |
194 JvmtiClassEventMark(JavaThread *thread, klassOop klass) : | |
195 JvmtiThreadEventMark(thread) { | |
196 _jc = to_jclass(klass); | |
197 }; | |
198 jclass jni_class() { return _jc; } | |
199 }; | |
200 | |
201 class JvmtiMethodEventMark : public JvmtiThreadEventMark { | |
202 private: | |
203 jmethodID _mid; | |
204 | |
205 public: | |
206 JvmtiMethodEventMark(JavaThread *thread, methodHandle method) : | |
207 JvmtiThreadEventMark(thread), | |
208 _mid(to_jmethodID(method)) {}; | |
209 jmethodID jni_methodID() { return _mid; } | |
210 }; | |
211 | |
212 class JvmtiLocationEventMark : public JvmtiMethodEventMark { | |
213 private: | |
214 jlocation _loc; | |
215 | |
216 public: | |
217 JvmtiLocationEventMark(JavaThread *thread, methodHandle method, address location) : | |
218 JvmtiMethodEventMark(thread, method), | |
219 _loc(location - method->code_base()) {}; | |
220 jlocation location() { return _loc; } | |
221 }; | |
222 | |
223 class JvmtiExceptionEventMark : public JvmtiLocationEventMark { | |
224 private: | |
225 jobject _exc; | |
226 | |
227 public: | |
228 JvmtiExceptionEventMark(JavaThread *thread, methodHandle method, address location, Handle exception) : | |
229 JvmtiLocationEventMark(thread, method, location), | |
230 _exc(to_jobject(exception())) {}; | |
231 jobject exception() { return _exc; } | |
232 }; | |
233 | |
234 class JvmtiClassFileLoadEventMark : public JvmtiThreadEventMark { | |
235 private: | |
236 const char *_class_name; | |
237 jobject _jloader; | |
238 jobject _protection_domain; | |
239 jclass _class_being_redefined; | |
240 | |
241 public: | |
242 JvmtiClassFileLoadEventMark(JavaThread *thread, symbolHandle name, | |
243 Handle class_loader, Handle prot_domain, KlassHandle *class_being_redefined) : JvmtiThreadEventMark(thread) { | |
244 _class_name = name() != NULL? name->as_utf8() : NULL; | |
245 _jloader = (jobject)to_jobject(class_loader()); | |
246 _protection_domain = (jobject)to_jobject(prot_domain()); | |
247 if (class_being_redefined == NULL) { | |
248 _class_being_redefined = NULL; | |
249 } else { | |
250 _class_being_redefined = (jclass)to_jclass((*class_being_redefined)()); | |
251 } | |
252 }; | |
253 const char *class_name() { | |
254 return _class_name; | |
255 } | |
256 jobject jloader() { | |
257 return _jloader; | |
258 } | |
259 jobject protection_domain() { | |
260 return _protection_domain; | |
261 } | |
262 jclass class_being_redefined() { | |
263 return _class_being_redefined; | |
264 } | |
265 }; | |
266 | |
267 ////////////////////////////////////////////////////////////////////////////// | |
268 | |
269 int JvmtiExport::_field_access_count = 0; | |
270 int JvmtiExport::_field_modification_count = 0; | |
271 | |
272 bool JvmtiExport::_can_access_local_variables = false; | |
273 bool JvmtiExport::_can_examine_or_deopt_anywhere = false; | |
274 bool JvmtiExport::_can_hotswap_or_post_breakpoint = false; | |
275 bool JvmtiExport::_can_modify_any_class = false; | |
276 bool JvmtiExport::_can_walk_any_space = false; | |
277 | |
278 bool JvmtiExport::_has_redefined_a_class = false; | |
279 bool JvmtiExport::_all_dependencies_are_recorded = false; | |
280 | |
281 // | |
282 // field access management | |
283 // | |
284 | |
285 // interpreter generator needs the address of the counter | |
286 address JvmtiExport::get_field_access_count_addr() { | |
287 // We don't grab a lock because we don't want to | |
288 // serialize field access between all threads. This means that a | |
289 // thread on another processor can see the wrong count value and | |
290 // may either miss making a needed call into post_field_access() | |
291 // or will make an unneeded call into post_field_access(). We pay | |
292 // this price to avoid slowing down the VM when we aren't watching | |
293 // field accesses. | |
294 // Other access/mutation safe by virtue of being in VM state. | |
295 return (address)(&_field_access_count); | |
296 } | |
297 | |
298 // | |
299 // field modification management | |
300 // | |
301 | |
302 // interpreter generator needs the address of the counter | |
303 address JvmtiExport::get_field_modification_count_addr() { | |
304 // We don't grab a lock because we don't | |
305 // want to serialize field modification between all threads. This | |
306 // means that a thread on another processor can see the wrong | |
307 // count value and may either miss making a needed call into | |
308 // post_field_modification() or will make an unneeded call into | |
309 // post_field_modification(). We pay this price to avoid slowing | |
310 // down the VM when we aren't watching field modifications. | |
311 // Other access/mutation safe by virtue of being in VM state. | |
312 return (address)(&_field_modification_count); | |
313 } | |
314 | |
315 | |
316 /////////////////////////////////////////////////////////////// | |
317 // Functions needed by java.lang.instrument for starting up javaagent. | |
318 /////////////////////////////////////////////////////////////// | |
319 | |
320 jint | |
321 JvmtiExport::get_jvmti_interface(JavaVM *jvm, void **penv, jint version) { | |
322 /* To Do: add version checks */ | |
323 | |
324 if (JvmtiEnv::get_phase() == JVMTI_PHASE_LIVE) { | |
325 JavaThread* current_thread = (JavaThread*) ThreadLocalStorage::thread(); | |
326 // transition code: native to VM | |
327 ThreadInVMfromNative __tiv(current_thread); | |
328 __ENTRY(jvmtiEnv*, JvmtiExport::get_jvmti_interface, current_thread) | |
329 debug_only(VMNativeEntryWrapper __vew;) | |
330 | |
331 JvmtiEnv *jvmti_env = JvmtiEnv::create_a_jvmti(); | |
332 *penv = jvmti_env->jvmti_external(); // actual type is jvmtiEnv* -- not to be confused with JvmtiEnv* | |
333 return JNI_OK; | |
334 | |
335 } else if (JvmtiEnv::get_phase() == JVMTI_PHASE_ONLOAD) { | |
336 // not live, no thread to transition | |
337 JvmtiEnv *jvmti_env = JvmtiEnv::create_a_jvmti(); | |
338 *penv = jvmti_env->jvmti_external(); // actual type is jvmtiEnv* -- not to be confused with JvmtiEnv* | |
339 return JNI_OK; | |
340 | |
341 } else { | |
342 // Called at the wrong time | |
343 *penv = NULL; | |
344 return JNI_EDETACHED; | |
345 } | |
346 } | |
347 | |
348 void JvmtiExport::enter_primordial_phase() { | |
349 JvmtiEnvBase::set_phase(JVMTI_PHASE_PRIMORDIAL); | |
350 } | |
351 | |
352 void JvmtiExport::enter_start_phase() { | |
353 JvmtiManageCapabilities::recompute_always_capabilities(); | |
354 JvmtiEnvBase::set_phase(JVMTI_PHASE_START); | |
355 } | |
356 | |
357 void JvmtiExport::enter_onload_phase() { | |
358 JvmtiEnvBase::set_phase(JVMTI_PHASE_ONLOAD); | |
359 } | |
360 | |
361 void JvmtiExport::enter_live_phase() { | |
362 JvmtiEnvBase::set_phase(JVMTI_PHASE_LIVE); | |
363 } | |
364 | |
365 // | |
366 // JVMTI events that the VM posts to the debugger and also startup agent | |
367 // and call the agent's premain() for java.lang.instrument. | |
368 // | |
369 | |
370 void JvmtiExport::post_vm_start() { | |
371 EVT_TRIG_TRACE(JVMTI_EVENT_VM_START, ("JVMTI Trg VM start event triggered" )); | |
372 | |
373 // can now enable some events | |
374 JvmtiEventController::vm_start(); | |
375 | |
376 JvmtiEnvIterator it; | |
377 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { | |
378 if (env->is_enabled(JVMTI_EVENT_VM_START)) { | |
379 EVT_TRACE(JVMTI_EVENT_VM_START, ("JVMTI Evt VM start event sent" )); | |
380 | |
381 JavaThread *thread = JavaThread::current(); | |
382 JvmtiThreadEventMark jem(thread); | |
383 JvmtiJavaThreadEventTransition jet(thread); | |
384 jvmtiEventVMStart callback = env->callbacks()->VMStart; | |
385 if (callback != NULL) { | |
386 (*callback)(env->jvmti_external(), jem.jni_env()); | |
387 } | |
388 } | |
389 } | |
390 } | |
391 | |
392 | |
393 void JvmtiExport::post_vm_initialized() { | |
394 EVT_TRIG_TRACE(JVMTI_EVENT_VM_INIT, ("JVMTI Trg VM init event triggered" )); | |
395 | |
396 // can now enable events | |
397 JvmtiEventController::vm_init(); | |
398 | |
399 JvmtiEnvIterator it; | |
400 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { | |
401 if (env->is_enabled(JVMTI_EVENT_VM_INIT)) { | |
402 EVT_TRACE(JVMTI_EVENT_VM_INIT, ("JVMTI Evt VM init event sent" )); | |
403 | |
404 JavaThread *thread = JavaThread::current(); | |
405 JvmtiThreadEventMark jem(thread); | |
406 JvmtiJavaThreadEventTransition jet(thread); | |
407 jvmtiEventVMInit callback = env->callbacks()->VMInit; | |
408 if (callback != NULL) { | |
409 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread()); | |
410 } | |
411 } | |
412 } | |
413 } | |
414 | |
415 | |
416 void JvmtiExport::post_vm_death() { | |
417 EVT_TRIG_TRACE(JVMTI_EVENT_VM_DEATH, ("JVMTI Trg VM death event triggered" )); | |
418 | |
419 JvmtiEnvIterator it; | |
420 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { | |
421 if (env->is_enabled(JVMTI_EVENT_VM_DEATH)) { | |
422 EVT_TRACE(JVMTI_EVENT_VM_DEATH, ("JVMTI Evt VM death event sent" )); | |
423 | |
424 JavaThread *thread = JavaThread::current(); | |
425 JvmtiEventMark jem(thread); | |
426 JvmtiJavaThreadEventTransition jet(thread); | |
427 jvmtiEventVMDeath callback = env->callbacks()->VMDeath; | |
428 if (callback != NULL) { | |
429 (*callback)(env->jvmti_external(), jem.jni_env()); | |
430 } | |
431 } | |
432 } | |
433 | |
434 JvmtiEnvBase::set_phase(JVMTI_PHASE_DEAD); | |
435 JvmtiEventController::vm_death(); | |
436 } | |
437 | |
438 char** | |
439 JvmtiExport::get_all_native_method_prefixes(int* count_ptr) { | |
440 // Have to grab JVMTI thread state lock to be sure environment doesn't | |
441 // go away while we iterate them. No locks during VM bring-up. | |
442 if (Threads::number_of_threads() == 0 || SafepointSynchronize::is_at_safepoint()) { | |
443 return JvmtiEnvBase::get_all_native_method_prefixes(count_ptr); | |
444 } else { | |
445 MutexLocker mu(JvmtiThreadState_lock); | |
446 return JvmtiEnvBase::get_all_native_method_prefixes(count_ptr); | |
447 } | |
448 } | |
449 | |
450 class JvmtiClassFileLoadHookPoster : public StackObj { | |
451 private: | |
452 symbolHandle _h_name; | |
453 Handle _class_loader; | |
454 Handle _h_protection_domain; | |
455 unsigned char ** _data_ptr; | |
456 unsigned char ** _end_ptr; | |
457 JavaThread * _thread; | |
458 jint _curr_len; | |
459 unsigned char * _curr_data; | |
460 JvmtiEnv * _curr_env; | |
461 jint * _cached_length_ptr; | |
462 unsigned char ** _cached_data_ptr; | |
463 JvmtiThreadState * _state; | |
464 KlassHandle * _h_class_being_redefined; | |
465 JvmtiClassLoadKind _load_kind; | |
466 | |
467 public: | |
468 inline JvmtiClassFileLoadHookPoster(symbolHandle h_name, Handle class_loader, | |
469 Handle h_protection_domain, | |
470 unsigned char **data_ptr, unsigned char **end_ptr, | |
471 unsigned char **cached_data_ptr, | |
472 jint *cached_length_ptr) { | |
473 _h_name = h_name; | |
474 _class_loader = class_loader; | |
475 _h_protection_domain = h_protection_domain; | |
476 _data_ptr = data_ptr; | |
477 _end_ptr = end_ptr; | |
478 _thread = JavaThread::current(); | |
479 _curr_len = *end_ptr - *data_ptr; | |
480 _curr_data = *data_ptr; | |
481 _curr_env = NULL; | |
482 _cached_length_ptr = cached_length_ptr; | |
483 _cached_data_ptr = cached_data_ptr; | |
484 *_cached_length_ptr = 0; | |
485 *_cached_data_ptr = NULL; | |
486 | |
487 _state = _thread->jvmti_thread_state(); | |
488 if (_state != NULL) { | |
489 _h_class_being_redefined = _state->get_class_being_redefined(); | |
490 _load_kind = _state->get_class_load_kind(); | |
491 // Clear class_being_redefined flag here. The action | |
492 // from agent handler could generate a new class file load | |
493 // hook event and if it is not cleared the new event generated | |
494 // from regular class file load could have this stale redefined | |
495 // class handle info. | |
496 _state->clear_class_being_redefined(); | |
497 } else { | |
498 // redefine and retransform will always set the thread state | |
499 _h_class_being_redefined = (KlassHandle *) NULL; | |
500 _load_kind = jvmti_class_load_kind_load; | |
501 } | |
502 } | |
503 | |
504 void post() { | |
505 // EVT_TRIG_TRACE(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK, | |
506 // ("JVMTI [%s] class file load hook event triggered", | |
507 // JvmtiTrace::safe_get_thread_name(_thread))); | |
508 post_all_envs(); | |
509 copy_modified_data(); | |
510 } | |
511 | |
512 private: | |
513 void post_all_envs() { | |
514 if (_load_kind != jvmti_class_load_kind_retransform) { | |
515 // for class load and redefine, | |
516 // call the non-retransformable agents | |
517 JvmtiEnvIterator it; | |
518 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { | |
519 if (!env->is_retransformable() && env->is_enabled(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK)) { | |
520 // non-retransformable agents cannot retransform back, | |
521 // so no need to cache the original class file bytes | |
522 post_to_env(env, false); | |
523 } | |
524 } | |
525 } | |
526 JvmtiEnvIterator it; | |
527 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { | |
528 // retransformable agents get all events | |
529 if (env->is_retransformable() && env->is_enabled(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK)) { | |
530 // retransformable agents need to cache the original class file | |
531 // bytes if changes are made via the ClassFileLoadHook | |
532 post_to_env(env, true); | |
533 } | |
534 } | |
535 } | |
536 | |
537 void post_to_env(JvmtiEnv* env, bool caching_needed) { | |
538 unsigned char *new_data = NULL; | |
539 jint new_len = 0; | |
540 // EVT_TRACE(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK, | |
541 // ("JVMTI [%s] class file load hook event sent %s data_ptr = %d, data_len = %d", | |
542 // JvmtiTrace::safe_get_thread_name(_thread), | |
543 // _h_name.is_null() ? "NULL" : _h_name->as_utf8(), | |
544 // _curr_data, _curr_len )); | |
545 JvmtiClassFileLoadEventMark jem(_thread, _h_name, _class_loader, | |
546 _h_protection_domain, | |
547 _h_class_being_redefined); | |
548 JvmtiJavaThreadEventTransition jet(_thread); | |
549 JNIEnv* jni_env = (JvmtiEnv::get_phase() == JVMTI_PHASE_PRIMORDIAL)? | |
550 NULL : jem.jni_env(); | |
551 jvmtiEventClassFileLoadHook callback = env->callbacks()->ClassFileLoadHook; | |
552 if (callback != NULL) { | |
553 (*callback)(env->jvmti_external(), jni_env, | |
554 jem.class_being_redefined(), | |
555 jem.jloader(), jem.class_name(), | |
556 jem.protection_domain(), | |
557 _curr_len, _curr_data, | |
558 &new_len, &new_data); | |
559 } | |
560 if (new_data != NULL) { | |
561 // this agent has modified class data. | |
562 if (caching_needed && *_cached_data_ptr == NULL) { | |
563 // data has been changed by the new retransformable agent | |
564 // and it hasn't already been cached, cache it | |
565 *_cached_data_ptr = (unsigned char *)os::malloc(_curr_len); | |
566 memcpy(*_cached_data_ptr, _curr_data, _curr_len); | |
567 *_cached_length_ptr = _curr_len; | |
568 } | |
569 | |
570 if (_curr_data != *_data_ptr) { | |
571 // curr_data is previous agent modified class data. | |
572 // And this has been changed by the new agent so | |
573 // we can delete it now. | |
574 _curr_env->Deallocate(_curr_data); | |
575 } | |
576 | |
577 // Class file data has changed by the current agent. | |
578 _curr_data = new_data; | |
579 _curr_len = new_len; | |
580 // Save the current agent env we need this to deallocate the | |
581 // memory allocated by this agent. | |
582 _curr_env = env; | |
583 } | |
584 } | |
585 | |
586 void copy_modified_data() { | |
587 // if one of the agent has modified class file data. | |
588 // Copy modified class data to new resources array. | |
589 if (_curr_data != *_data_ptr) { | |
590 *_data_ptr = NEW_RESOURCE_ARRAY(u1, _curr_len); | |
591 memcpy(*_data_ptr, _curr_data, _curr_len); | |
592 *_end_ptr = *_data_ptr + _curr_len; | |
593 _curr_env->Deallocate(_curr_data); | |
594 } | |
595 } | |
596 }; | |
597 | |
598 bool JvmtiExport::_should_post_class_file_load_hook = false; | |
599 | |
600 // this entry is for class file load hook on class load, redefine and retransform | |
601 void JvmtiExport::post_class_file_load_hook(symbolHandle h_name, | |
602 Handle class_loader, | |
603 Handle h_protection_domain, | |
604 unsigned char **data_ptr, | |
605 unsigned char **end_ptr, | |
606 unsigned char **cached_data_ptr, | |
607 jint *cached_length_ptr) { | |
608 JvmtiClassFileLoadHookPoster poster(h_name, class_loader, | |
609 h_protection_domain, | |
610 data_ptr, end_ptr, | |
611 cached_data_ptr, | |
612 cached_length_ptr); | |
613 poster.post(); | |
614 } | |
615 | |
616 void JvmtiExport::report_unsupported(bool on) { | |
617 // If any JVMTI service is turned on, we need to exit before native code | |
618 // tries to access nonexistant services. | |
619 if (on) { | |
620 vm_exit_during_initialization("Java Kernel does not support JVMTI."); | |
621 } | |
622 } | |
623 | |
624 | |
625 #ifndef JVMTI_KERNEL | |
626 static inline klassOop oop_to_klassOop(oop obj) { | |
627 klassOop k = obj->klass(); | |
628 | |
629 // if the object is a java.lang.Class then return the java mirror | |
630 if (k == SystemDictionary::class_klass()) { | |
631 if (!java_lang_Class::is_primitive(obj)) { | |
632 k = java_lang_Class::as_klassOop(obj); | |
633 assert(k != NULL, "class for non-primitive mirror must exist"); | |
634 } | |
635 } | |
636 return k; | |
637 } | |
638 | |
639 class JvmtiVMObjectAllocEventMark : public JvmtiClassEventMark { | |
640 private: | |
641 jobject _jobj; | |
642 jlong _size; | |
643 public: | |
644 JvmtiVMObjectAllocEventMark(JavaThread *thread, oop obj) : JvmtiClassEventMark(thread, oop_to_klassOop(obj)) { | |
645 _jobj = (jobject)to_jobject(obj); | |
646 _size = obj->size() * wordSize; | |
647 }; | |
648 jobject jni_jobject() { return _jobj; } | |
649 jlong size() { return _size; } | |
650 }; | |
651 | |
652 class JvmtiCompiledMethodLoadEventMark : public JvmtiMethodEventMark { | |
653 private: | |
654 jint _code_size; | |
655 const void *_code_data; | |
656 jint _map_length; | |
657 jvmtiAddrLocationMap *_map; | |
658 const void *_compile_info; | |
659 public: | |
660 JvmtiCompiledMethodLoadEventMark(JavaThread *thread, nmethod *nm) | |
661 : JvmtiMethodEventMark(thread,methodHandle(thread, nm->method())) { | |
662 _code_data = nm->code_begin(); | |
663 _code_size = nm->code_size(); | |
664 _compile_info = NULL; /* no info for our VM. */ | |
665 JvmtiCodeBlobEvents::build_jvmti_addr_location_map(nm, &_map, &_map_length); | |
666 } | |
667 ~JvmtiCompiledMethodLoadEventMark() { | |
668 FREE_C_HEAP_ARRAY(jvmtiAddrLocationMap, _map); | |
669 } | |
670 | |
671 jint code_size() { return _code_size; } | |
672 const void *code_data() { return _code_data; } | |
673 jint map_length() { return _map_length; } | |
674 const jvmtiAddrLocationMap* map() { return _map; } | |
675 const void *compile_info() { return _compile_info; } | |
676 }; | |
677 | |
678 | |
679 | |
680 class JvmtiMonitorEventMark : public JvmtiThreadEventMark { | |
681 private: | |
682 jobject _jobj; | |
683 public: | |
684 JvmtiMonitorEventMark(JavaThread *thread, oop object) | |
685 : JvmtiThreadEventMark(thread){ | |
686 _jobj = to_jobject(object); | |
687 } | |
688 jobject jni_object() { return _jobj; } | |
689 }; | |
690 | |
691 /////////////////////////////////////////////////////////////// | |
692 // | |
693 // pending CompiledMethodUnload support | |
694 // | |
695 | |
696 bool JvmtiExport::_have_pending_compiled_method_unload_events; | |
697 GrowableArray<jmethodID>* JvmtiExport::_pending_compiled_method_unload_method_ids; | |
698 GrowableArray<const void *>* JvmtiExport::_pending_compiled_method_unload_code_begins; | |
699 JavaThread* JvmtiExport::_current_poster; | |
700 | |
701 // post any pending CompiledMethodUnload events | |
702 | |
703 void JvmtiExport::post_pending_compiled_method_unload_events() { | |
704 JavaThread* self = JavaThread::current(); | |
705 assert(!self->owns_locks(), "can't hold locks"); | |
706 | |
707 // Indicates if this is the first activiation of this function. | |
708 // In theory the profiler's callback could call back into VM and provoke | |
709 // another CompiledMethodLoad event to be posted from this thread. As the | |
710 // stack rewinds we need to ensure that the original activation does the | |
711 // completion and notifies any waiters. | |
712 bool first_activation = false; | |
713 | |
714 // the jmethodID (may not be valid) to be used for a single event | |
715 jmethodID method; | |
716 const void *code_begin; | |
717 | |
718 // grab the monitor and check if another thread is already posting | |
719 // events. If there is another thread posting events then we wait | |
720 // until it completes. (In theory we could check the pending events to | |
721 // see if any of the addresses overlap with the event that we want to | |
722 // post but as it will happen so rarely we just block any thread waiting | |
723 // to post a CompiledMethodLoad or DynamicCodeGenerated event until all | |
724 // pending CompiledMethodUnload events have been posted). | |
725 // | |
726 // If another thread isn't posting we examine the list of pending jmethodIDs. | |
727 // If the list is empty then we are done. If it's not empty then this thread | |
728 // (self) becomes the pending event poster and we remove the top (last) | |
729 // event from the list. Note that this means we remove the newest event first | |
730 // but as they are all CompiledMethodUnload events the order doesn't matter. | |
731 // Once we have removed a jmethodID then we exit the monitor. Any other thread | |
732 // wanting to post a CompiledMethodLoad or DynamicCodeGenerated event will | |
733 // be forced to wait on the monitor. | |
734 { | |
735 MutexLocker mu(JvmtiPendingEvent_lock); | |
736 if (_current_poster != self) { | |
737 while (_current_poster != NULL) { | |
738 JvmtiPendingEvent_lock->wait(); | |
739 } | |
740 } | |
741 if ((_pending_compiled_method_unload_method_ids == NULL) || | |
742 (_pending_compiled_method_unload_method_ids->length() == 0)) { | |
743 return; | |
744 } | |
745 if (_current_poster == NULL) { | |
746 _current_poster = self; | |
747 first_activation = true; | |
748 } else { | |
749 // re-entrant | |
750 guarantee(_current_poster == self, "checking"); | |
751 } | |
752 method = _pending_compiled_method_unload_method_ids->pop(); | |
753 code_begin = _pending_compiled_method_unload_code_begins->pop(); | |
754 } | |
755 | |
756 // This thread is the pending event poster so it first posts the CompiledMethodUnload | |
757 // event for the jmethodID that has been removed from the list. Once posted it | |
758 // re-grabs the monitor and checks the list again. If the list is empty then and this | |
759 // is the first activation of the function then we reset the _have_pending_events | |
760 // flag, cleanup _current_poster to indicate that no thread is now servicing the | |
761 // pending events list, and finally notify any thread that might be waiting. | |
762 for (;;) { | |
763 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_UNLOAD, | |
764 ("JVMTI [%s] method compile unload event triggered", | |
765 JvmtiTrace::safe_get_thread_name(self))); | |
766 | |
767 // post the event for each environment that has this event enabled. | |
768 JvmtiEnvIterator it; | |
769 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { | |
770 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_UNLOAD)) { | |
771 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_UNLOAD, | |
772 ("JVMTI [%s] class compile method unload event sent jmethodID " PTR_FORMAT, | |
773 JvmtiTrace::safe_get_thread_name(self), method)); | |
774 | |
775 JvmtiEventMark jem(self); | |
776 JvmtiJavaThreadEventTransition jet(self); | |
777 jvmtiEventCompiledMethodUnload callback = env->callbacks()->CompiledMethodUnload; | |
778 if (callback != NULL) { | |
779 (*callback)(env->jvmti_external(), method, code_begin); | |
780 } | |
781 } | |
782 } | |
783 | |
784 // event posted, now re-grab monitor and get the next event | |
785 // If there's no next event then we are done. If this is the first | |
786 // activiation of this function by this thread notify any waiters | |
787 // so that they can post. | |
788 { | |
789 MutexLocker ml(JvmtiPendingEvent_lock); | |
790 if (_pending_compiled_method_unload_method_ids->length() == 0) { | |
791 if (first_activation) { | |
792 _have_pending_compiled_method_unload_events = false; | |
793 _current_poster = NULL; | |
794 JvmtiPendingEvent_lock->notify_all(); | |
795 } | |
796 return; | |
797 } | |
798 method = _pending_compiled_method_unload_method_ids->pop(); | |
799 code_begin = _pending_compiled_method_unload_code_begins->pop(); | |
800 } | |
801 } | |
802 } | |
803 | |
804 /////////////////////////////////////////////////////////////// | |
805 // | |
806 // JvmtiExport | |
807 // | |
808 | |
809 void JvmtiExport::post_raw_breakpoint(JavaThread *thread, methodOop method, address location) { | |
810 HandleMark hm(thread); | |
811 methodHandle mh(thread, method); | |
812 | |
813 JvmtiThreadState *state = thread->jvmti_thread_state(); | |
814 if (state == NULL) { | |
815 return; | |
816 } | |
817 EVT_TRIG_TRACE(JVMTI_EVENT_BREAKPOINT, ("JVMTI [%s] Trg Breakpoint triggered", | |
818 JvmtiTrace::safe_get_thread_name(thread))); | |
819 JvmtiEnvThreadStateIterator it(state); | |
820 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { | |
821 ets->compare_and_set_current_location(mh(), location, JVMTI_EVENT_BREAKPOINT); | |
822 if (!ets->breakpoint_posted() && ets->is_enabled(JVMTI_EVENT_BREAKPOINT)) { | |
823 ThreadState old_os_state = thread->osthread()->get_state(); | |
824 thread->osthread()->set_state(BREAKPOINTED); | |
825 EVT_TRACE(JVMTI_EVENT_BREAKPOINT, ("JVMTI [%s] Evt Breakpoint sent %s.%s @ %d", | |
826 JvmtiTrace::safe_get_thread_name(thread), | |
827 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), | |
828 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), | |
829 location - mh()->code_base() )); | |
830 | |
831 JvmtiEnv *env = ets->get_env(); | |
832 JvmtiLocationEventMark jem(thread, mh, location); | |
833 JvmtiJavaThreadEventTransition jet(thread); | |
834 jvmtiEventBreakpoint callback = env->callbacks()->Breakpoint; | |
835 if (callback != NULL) { | |
836 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), | |
837 jem.jni_methodID(), jem.location()); | |
838 } | |
839 | |
840 ets->set_breakpoint_posted(); | |
841 thread->osthread()->set_state(old_os_state); | |
842 } | |
843 } | |
844 } | |
845 | |
846 ////////////////////////////////////////////////////////////////////////////// | |
847 | |
848 bool JvmtiExport::_can_get_source_debug_extension = false; | |
849 bool JvmtiExport::_can_maintain_original_method_order = false; | |
850 bool JvmtiExport::_can_post_interpreter_events = false; | |
851 bool JvmtiExport::_can_post_exceptions = false; | |
852 bool JvmtiExport::_can_post_breakpoint = false; | |
853 bool JvmtiExport::_can_post_field_access = false; | |
854 bool JvmtiExport::_can_post_field_modification = false; | |
855 bool JvmtiExport::_can_post_method_entry = false; | |
856 bool JvmtiExport::_can_post_method_exit = false; | |
857 bool JvmtiExport::_can_pop_frame = false; | |
858 bool JvmtiExport::_can_force_early_return = false; | |
859 | |
860 bool JvmtiExport::_should_post_single_step = false; | |
861 bool JvmtiExport::_should_post_field_access = false; | |
862 bool JvmtiExport::_should_post_field_modification = false; | |
863 bool JvmtiExport::_should_post_class_load = false; | |
864 bool JvmtiExport::_should_post_class_prepare = false; | |
865 bool JvmtiExport::_should_post_class_unload = false; | |
866 bool JvmtiExport::_should_post_thread_life = false; | |
867 bool JvmtiExport::_should_clean_up_heap_objects = false; | |
868 bool JvmtiExport::_should_post_native_method_bind = false; | |
869 bool JvmtiExport::_should_post_dynamic_code_generated = false; | |
870 bool JvmtiExport::_should_post_data_dump = false; | |
871 bool JvmtiExport::_should_post_compiled_method_load = false; | |
872 bool JvmtiExport::_should_post_compiled_method_unload = false; | |
873 bool JvmtiExport::_should_post_monitor_contended_enter = false; | |
874 bool JvmtiExport::_should_post_monitor_contended_entered = false; | |
875 bool JvmtiExport::_should_post_monitor_wait = false; | |
876 bool JvmtiExport::_should_post_monitor_waited = false; | |
877 bool JvmtiExport::_should_post_garbage_collection_start = false; | |
878 bool JvmtiExport::_should_post_garbage_collection_finish = false; | |
879 bool JvmtiExport::_should_post_object_free = false; | |
880 bool JvmtiExport::_should_post_resource_exhausted = false; | |
881 bool JvmtiExport::_should_post_vm_object_alloc = false; | |
882 | |
883 //////////////////////////////////////////////////////////////////////////////////////////////// | |
884 | |
885 | |
886 // | |
887 // JVMTI single step management | |
888 // | |
889 void JvmtiExport::at_single_stepping_point(JavaThread *thread, methodOop method, address location) { | |
890 assert(JvmtiExport::should_post_single_step(), "must be single stepping"); | |
891 | |
892 HandleMark hm(thread); | |
893 methodHandle mh(thread, method); | |
894 | |
895 // update information about current location and post a step event | |
896 JvmtiThreadState *state = thread->jvmti_thread_state(); | |
897 if (state == NULL) { | |
898 return; | |
899 } | |
900 EVT_TRIG_TRACE(JVMTI_EVENT_SINGLE_STEP, ("JVMTI [%s] Trg Single Step triggered", | |
901 JvmtiTrace::safe_get_thread_name(thread))); | |
902 if (!state->hide_single_stepping()) { | |
903 if (state->is_pending_step_for_popframe()) { | |
904 state->process_pending_step_for_popframe(); | |
905 } | |
906 if (state->is_pending_step_for_earlyret()) { | |
907 state->process_pending_step_for_earlyret(); | |
908 } | |
909 JvmtiExport::post_single_step(thread, mh(), location); | |
910 } | |
911 } | |
912 | |
913 | |
914 void JvmtiExport::expose_single_stepping(JavaThread *thread) { | |
915 JvmtiThreadState *state = thread->jvmti_thread_state(); | |
916 if (state != NULL) { | |
917 state->clear_hide_single_stepping(); | |
918 } | |
919 } | |
920 | |
921 | |
922 bool JvmtiExport::hide_single_stepping(JavaThread *thread) { | |
923 JvmtiThreadState *state = thread->jvmti_thread_state(); | |
924 if (state != NULL && state->is_enabled(JVMTI_EVENT_SINGLE_STEP)) { | |
925 state->set_hide_single_stepping(); | |
926 return true; | |
927 } else { | |
928 return false; | |
929 } | |
930 } | |
931 | |
932 void JvmtiExport::post_class_load(JavaThread *thread, klassOop klass) { | |
933 HandleMark hm(thread); | |
934 KlassHandle kh(thread, klass); | |
935 | |
936 EVT_TRIG_TRACE(JVMTI_EVENT_CLASS_LOAD, ("JVMTI [%s] Trg Class Load triggered", | |
937 JvmtiTrace::safe_get_thread_name(thread))); | |
938 JvmtiThreadState* state = thread->jvmti_thread_state(); | |
939 if (state == NULL) { | |
940 return; | |
941 } | |
942 JvmtiEnvThreadStateIterator it(state); | |
943 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { | |
944 if (ets->is_enabled(JVMTI_EVENT_CLASS_LOAD)) { | |
945 EVT_TRACE(JVMTI_EVENT_CLASS_LOAD, ("JVMTI [%s] Evt Class Load sent %s", | |
946 JvmtiTrace::safe_get_thread_name(thread), | |
947 kh()==NULL? "NULL" : Klass::cast(kh())->external_name() )); | |
948 | |
949 JvmtiEnv *env = ets->get_env(); | |
950 JvmtiClassEventMark jem(thread, kh()); | |
951 JvmtiJavaThreadEventTransition jet(thread); | |
952 jvmtiEventClassLoad callback = env->callbacks()->ClassLoad; | |
953 if (callback != NULL) { | |
954 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_class()); | |
955 } | |
956 } | |
957 } | |
958 } | |
959 | |
960 | |
961 void JvmtiExport::post_class_prepare(JavaThread *thread, klassOop klass) { | |
962 HandleMark hm(thread); | |
963 KlassHandle kh(thread, klass); | |
964 | |
965 EVT_TRIG_TRACE(JVMTI_EVENT_CLASS_PREPARE, ("JVMTI [%s] Trg Class Prepare triggered", | |
966 JvmtiTrace::safe_get_thread_name(thread))); | |
967 JvmtiThreadState* state = thread->jvmti_thread_state(); | |
968 if (state == NULL) { | |
969 return; | |
970 } | |
971 JvmtiEnvThreadStateIterator it(state); | |
972 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { | |
973 if (ets->is_enabled(JVMTI_EVENT_CLASS_PREPARE)) { | |
974 EVT_TRACE(JVMTI_EVENT_CLASS_PREPARE, ("JVMTI [%s] Evt Class Prepare sent %s", | |
975 JvmtiTrace::safe_get_thread_name(thread), | |
976 kh()==NULL? "NULL" : Klass::cast(kh())->external_name() )); | |
977 | |
978 JvmtiEnv *env = ets->get_env(); | |
979 JvmtiClassEventMark jem(thread, kh()); | |
980 JvmtiJavaThreadEventTransition jet(thread); | |
981 jvmtiEventClassPrepare callback = env->callbacks()->ClassPrepare; | |
982 if (callback != NULL) { | |
983 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_class()); | |
984 } | |
985 } | |
986 } | |
987 } | |
988 | |
989 void JvmtiExport::post_class_unload(klassOop klass) { | |
990 Thread *thread = Thread::current(); | |
991 HandleMark hm(thread); | |
992 KlassHandle kh(thread, klass); | |
993 | |
994 EVT_TRIG_TRACE(EXT_EVENT_CLASS_UNLOAD, ("JVMTI [?] Trg Class Unload triggered" )); | |
995 if (JvmtiEventController::is_enabled((jvmtiEvent)EXT_EVENT_CLASS_UNLOAD)) { | |
996 assert(thread->is_VM_thread(), "wrong thread"); | |
997 | |
998 // get JavaThread for whom we are proxy | |
999 JavaThread *real_thread = | |
1000 (JavaThread *)((VMThread *)thread)->vm_operation()->calling_thread(); | |
1001 | |
1002 JvmtiEnvIterator it; | |
1003 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { | |
1004 if (env->is_enabled((jvmtiEvent)EXT_EVENT_CLASS_UNLOAD)) { | |
1005 EVT_TRACE(EXT_EVENT_CLASS_UNLOAD, ("JVMTI [?] Evt Class Unload sent %s", | |
1006 kh()==NULL? "NULL" : Klass::cast(kh())->external_name() )); | |
1007 | |
1008 // do everything manually, since this is a proxy - needs special care | |
1009 JNIEnv* jni_env = real_thread->jni_environment(); | |
1010 jthread jt = (jthread)JNIHandles::make_local(real_thread, real_thread->threadObj()); | |
1011 jclass jk = (jclass)JNIHandles::make_local(real_thread, Klass::cast(kh())->java_mirror()); | |
1012 | |
1013 // Before we call the JVMTI agent, we have to set the state in the | |
1014 // thread for which we are proxying. | |
1015 JavaThreadState prev_state = real_thread->thread_state(); | |
1016 assert(prev_state == _thread_blocked, "JavaThread should be at safepoint"); | |
1017 real_thread->set_thread_state(_thread_in_native); | |
1018 | |
1019 jvmtiExtensionEvent callback = env->ext_callbacks()->ClassUnload; | |
1020 if (callback != NULL) { | |
1021 (*callback)(env->jvmti_external(), jni_env, jt, jk); | |
1022 } | |
1023 | |
1024 assert(real_thread->thread_state() == _thread_in_native, | |
1025 "JavaThread should be in native"); | |
1026 real_thread->set_thread_state(prev_state); | |
1027 | |
1028 JNIHandles::destroy_local(jk); | |
1029 JNIHandles::destroy_local(jt); | |
1030 } | |
1031 } | |
1032 } | |
1033 } | |
1034 | |
1035 | |
1036 void JvmtiExport::post_thread_start(JavaThread *thread) { | |
1037 assert(thread->thread_state() == _thread_in_vm, "must be in vm state"); | |
1038 | |
1039 EVT_TRIG_TRACE(JVMTI_EVENT_THREAD_START, ("JVMTI [%s] Trg Thread Start event triggered", | |
1040 JvmtiTrace::safe_get_thread_name(thread))); | |
1041 | |
1042 // do JVMTI thread initialization (if needed) | |
1043 JvmtiEventController::thread_started(thread); | |
1044 | |
1045 // Do not post thread start event for hidden java thread. | |
1046 if (JvmtiEventController::is_enabled(JVMTI_EVENT_THREAD_START) && | |
1047 !thread->is_hidden_from_external_view()) { | |
1048 JvmtiEnvIterator it; | |
1049 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { | |
1050 if (env->is_enabled(JVMTI_EVENT_THREAD_START)) { | |
1051 EVT_TRACE(JVMTI_EVENT_THREAD_START, ("JVMTI [%s] Evt Thread Start event sent", | |
1052 JvmtiTrace::safe_get_thread_name(thread) )); | |
1053 | |
1054 JvmtiThreadEventMark jem(thread); | |
1055 JvmtiJavaThreadEventTransition jet(thread); | |
1056 jvmtiEventThreadStart callback = env->callbacks()->ThreadStart; | |
1057 if (callback != NULL) { | |
1058 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread()); | |
1059 } | |
1060 } | |
1061 } | |
1062 } | |
1063 } | |
1064 | |
1065 | |
1066 void JvmtiExport::post_thread_end(JavaThread *thread) { | |
1067 EVT_TRIG_TRACE(JVMTI_EVENT_THREAD_END, ("JVMTI [%s] Trg Thread End event triggered", | |
1068 JvmtiTrace::safe_get_thread_name(thread))); | |
1069 | |
1070 JvmtiThreadState *state = thread->jvmti_thread_state(); | |
1071 if (state == NULL) { | |
1072 return; | |
1073 } | |
1074 | |
1075 // Do not post thread end event for hidden java thread. | |
1076 if (state->is_enabled(JVMTI_EVENT_THREAD_END) && | |
1077 !thread->is_hidden_from_external_view()) { | |
1078 | |
1079 JvmtiEnvThreadStateIterator it(state); | |
1080 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { | |
1081 if (ets->is_enabled(JVMTI_EVENT_THREAD_END)) { | |
1082 EVT_TRACE(JVMTI_EVENT_THREAD_END, ("JVMTI [%s] Evt Thread End event sent", | |
1083 JvmtiTrace::safe_get_thread_name(thread) )); | |
1084 | |
1085 JvmtiEnv *env = ets->get_env(); | |
1086 JvmtiThreadEventMark jem(thread); | |
1087 JvmtiJavaThreadEventTransition jet(thread); | |
1088 jvmtiEventThreadEnd callback = env->callbacks()->ThreadEnd; | |
1089 if (callback != NULL) { | |
1090 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread()); | |
1091 } | |
1092 } | |
1093 } | |
1094 } | |
1095 } | |
1096 | |
1097 void JvmtiExport::post_object_free(JvmtiEnv* env, jlong tag) { | |
1098 assert(SafepointSynchronize::is_at_safepoint(), "must be executed at safepoint"); | |
1099 assert(env->is_enabled(JVMTI_EVENT_OBJECT_FREE), "checking"); | |
1100 | |
1101 EVT_TRIG_TRACE(JVMTI_EVENT_OBJECT_FREE, ("JVMTI [?] Trg Object Free triggered" )); | |
1102 EVT_TRACE(JVMTI_EVENT_OBJECT_FREE, ("JVMTI [?] Evt Object Free sent")); | |
1103 | |
1104 jvmtiEventObjectFree callback = env->callbacks()->ObjectFree; | |
1105 if (callback != NULL) { | |
1106 (*callback)(env->jvmti_external(), tag); | |
1107 } | |
1108 } | |
1109 | |
1110 void JvmtiExport::post_resource_exhausted(jint resource_exhausted_flags, const char* description) { | |
1111 EVT_TRIG_TRACE(JVMTI_EVENT_RESOURCE_EXHAUSTED, ("JVMTI Trg resource exhausted event triggered" )); | |
1112 | |
1113 JvmtiEnvIterator it; | |
1114 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { | |
1115 if (env->is_enabled(JVMTI_EVENT_RESOURCE_EXHAUSTED)) { | |
1116 EVT_TRACE(JVMTI_EVENT_RESOURCE_EXHAUSTED, ("JVMTI Evt resource exhausted event sent" )); | |
1117 | |
1118 JavaThread *thread = JavaThread::current(); | |
1119 JvmtiThreadEventMark jem(thread); | |
1120 JvmtiJavaThreadEventTransition jet(thread); | |
1121 jvmtiEventResourceExhausted callback = env->callbacks()->ResourceExhausted; | |
1122 if (callback != NULL) { | |
1123 (*callback)(env->jvmti_external(), jem.jni_env(), | |
1124 resource_exhausted_flags, NULL, description); | |
1125 } | |
1126 } | |
1127 } | |
1128 } | |
1129 | |
1130 void JvmtiExport::post_method_entry(JavaThread *thread, methodOop method, frame current_frame) { | |
1131 HandleMark hm(thread); | |
1132 methodHandle mh(thread, method); | |
1133 | |
1134 EVT_TRIG_TRACE(JVMTI_EVENT_METHOD_ENTRY, ("JVMTI [%s] Trg Method Entry triggered %s.%s", | |
1135 JvmtiTrace::safe_get_thread_name(thread), | |
1136 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), | |
1137 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() )); | |
1138 | |
1139 JvmtiThreadState* state = thread->jvmti_thread_state(); | |
1140 if (state == NULL || !state->is_interp_only_mode()) { | |
1141 // for any thread that actually wants method entry, interp_only_mode is set | |
1142 return; | |
1143 } | |
1144 | |
1145 state->incr_cur_stack_depth(); | |
1146 | |
1147 if (state->is_enabled(JVMTI_EVENT_METHOD_ENTRY)) { | |
1148 JvmtiEnvThreadStateIterator it(state); | |
1149 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { | |
1150 if (ets->is_enabled(JVMTI_EVENT_METHOD_ENTRY)) { | |
1151 EVT_TRACE(JVMTI_EVENT_METHOD_ENTRY, ("JVMTI [%s] Evt Method Entry sent %s.%s", | |
1152 JvmtiTrace::safe_get_thread_name(thread), | |
1153 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), | |
1154 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() )); | |
1155 | |
1156 JvmtiEnv *env = ets->get_env(); | |
1157 JvmtiMethodEventMark jem(thread, mh); | |
1158 JvmtiJavaThreadEventTransition jet(thread); | |
1159 jvmtiEventMethodEntry callback = env->callbacks()->MethodEntry; | |
1160 if (callback != NULL) { | |
1161 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_methodID()); | |
1162 } | |
1163 } | |
1164 } | |
1165 } | |
1166 } | |
1167 | |
1168 void JvmtiExport::post_method_exit(JavaThread *thread, methodOop method, frame current_frame) { | |
1169 HandleMark hm(thread); | |
1170 methodHandle mh(thread, method); | |
1171 | |
1172 EVT_TRIG_TRACE(JVMTI_EVENT_METHOD_EXIT, ("JVMTI [%s] Trg Method Exit triggered %s.%s", | |
1173 JvmtiTrace::safe_get_thread_name(thread), | |
1174 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), | |
1175 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() )); | |
1176 | |
1177 JvmtiThreadState *state = thread->jvmti_thread_state(); | |
1178 if (state == NULL || !state->is_interp_only_mode()) { | |
1179 // for any thread that actually wants method exit, interp_only_mode is set | |
1180 return; | |
1181 } | |
1182 | |
1183 // return a flag when a method terminates by throwing an exception | |
1184 // i.e. if an exception is thrown and it's not caught by the current method | |
1185 bool exception_exit = state->is_exception_detected() && !state->is_exception_caught(); | |
1186 | |
1187 | |
1188 if (state->is_enabled(JVMTI_EVENT_METHOD_EXIT)) { | |
1189 Handle result; | |
1190 jvalue value; | |
1191 value.j = 0L; | |
1192 | |
1193 // if the method hasn't been popped because of an exception then we populate | |
1194 // the return_value parameter for the callback. At this point we only have | |
1195 // the address of a "raw result" and we just call into the interpreter to | |
1196 // convert this into a jvalue. | |
1197 if (!exception_exit) { | |
1198 oop oop_result; | |
1199 BasicType type = current_frame.interpreter_frame_result(&oop_result, &value); | |
1200 if (type == T_OBJECT || type == T_ARRAY) { | |
1201 result = Handle(thread, oop_result); | |
1202 } | |
1203 } | |
1204 | |
1205 JvmtiEnvThreadStateIterator it(state); | |
1206 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { | |
1207 if (ets->is_enabled(JVMTI_EVENT_METHOD_EXIT)) { | |
1208 EVT_TRACE(JVMTI_EVENT_METHOD_EXIT, ("JVMTI [%s] Evt Method Exit sent %s.%s", | |
1209 JvmtiTrace::safe_get_thread_name(thread), | |
1210 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), | |
1211 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() )); | |
1212 | |
1213 JvmtiEnv *env = ets->get_env(); | |
1214 JvmtiMethodEventMark jem(thread, mh); | |
1215 if (result.not_null()) { | |
1216 value.l = JNIHandles::make_local(thread, result()); | |
1217 } | |
1218 JvmtiJavaThreadEventTransition jet(thread); | |
1219 jvmtiEventMethodExit callback = env->callbacks()->MethodExit; | |
1220 if (callback != NULL) { | |
1221 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), | |
1222 jem.jni_methodID(), exception_exit, value); | |
1223 } | |
1224 } | |
1225 } | |
1226 } | |
1227 | |
1228 if (state->is_enabled(JVMTI_EVENT_FRAME_POP)) { | |
1229 JvmtiEnvThreadStateIterator it(state); | |
1230 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { | |
1231 int cur_frame_number = state->cur_stack_depth(); | |
1232 | |
1233 if (ets->is_frame_pop(cur_frame_number)) { | |
1234 // we have a NotifyFramePop entry for this frame. | |
1235 // now check that this env/thread wants this event | |
1236 if (ets->is_enabled(JVMTI_EVENT_FRAME_POP)) { | |
1237 EVT_TRACE(JVMTI_EVENT_FRAME_POP, ("JVMTI [%s] Evt Frame Pop sent %s.%s", | |
1238 JvmtiTrace::safe_get_thread_name(thread), | |
1239 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), | |
1240 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() )); | |
1241 | |
1242 // we also need to issue a frame pop event for this frame | |
1243 JvmtiEnv *env = ets->get_env(); | |
1244 JvmtiMethodEventMark jem(thread, mh); | |
1245 JvmtiJavaThreadEventTransition jet(thread); | |
1246 jvmtiEventFramePop callback = env->callbacks()->FramePop; | |
1247 if (callback != NULL) { | |
1248 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), | |
1249 jem.jni_methodID(), exception_exit); | |
1250 } | |
1251 } | |
1252 // remove the frame's entry | |
1253 ets->clear_frame_pop(cur_frame_number); | |
1254 } | |
1255 } | |
1256 } | |
1257 | |
1258 state->decr_cur_stack_depth(); | |
1259 } | |
1260 | |
1261 | |
1262 // Todo: inline this for optimization | |
1263 void JvmtiExport::post_single_step(JavaThread *thread, methodOop method, address location) { | |
1264 HandleMark hm(thread); | |
1265 methodHandle mh(thread, method); | |
1266 | |
1267 JvmtiThreadState *state = thread->jvmti_thread_state(); | |
1268 if (state == NULL) { | |
1269 return; | |
1270 } | |
1271 JvmtiEnvThreadStateIterator it(state); | |
1272 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { | |
1273 ets->compare_and_set_current_location(mh(), location, JVMTI_EVENT_SINGLE_STEP); | |
1274 if (!ets->single_stepping_posted() && ets->is_enabled(JVMTI_EVENT_SINGLE_STEP)) { | |
1275 EVT_TRACE(JVMTI_EVENT_SINGLE_STEP, ("JVMTI [%s] Evt Single Step sent %s.%s @ %d", | |
1276 JvmtiTrace::safe_get_thread_name(thread), | |
1277 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), | |
1278 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), | |
1279 location - mh()->code_base() )); | |
1280 | |
1281 JvmtiEnv *env = ets->get_env(); | |
1282 JvmtiLocationEventMark jem(thread, mh, location); | |
1283 JvmtiJavaThreadEventTransition jet(thread); | |
1284 jvmtiEventSingleStep callback = env->callbacks()->SingleStep; | |
1285 if (callback != NULL) { | |
1286 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), | |
1287 jem.jni_methodID(), jem.location()); | |
1288 } | |
1289 | |
1290 ets->set_single_stepping_posted(); | |
1291 } | |
1292 } | |
1293 } | |
1294 | |
1295 | |
1296 void JvmtiExport::post_exception_throw(JavaThread *thread, methodOop method, address location, oop exception) { | |
1297 HandleMark hm(thread); | |
1298 methodHandle mh(thread, method); | |
1299 Handle exception_handle(thread, exception); | |
1300 | |
1301 JvmtiThreadState *state = thread->jvmti_thread_state(); | |
1302 if (state == NULL) { | |
1303 return; | |
1304 } | |
1305 | |
1306 EVT_TRIG_TRACE(JVMTI_EVENT_EXCEPTION, ("JVMTI [%s] Trg Exception thrown triggered", | |
1307 JvmtiTrace::safe_get_thread_name(thread))); | |
1308 if (!state->is_exception_detected()) { | |
1309 state->set_exception_detected(); | |
1310 JvmtiEnvThreadStateIterator it(state); | |
1311 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { | |
1312 if (ets->is_enabled(JVMTI_EVENT_EXCEPTION) && (exception != NULL)) { | |
1313 | |
1314 EVT_TRACE(JVMTI_EVENT_EXCEPTION, | |
1315 ("JVMTI [%s] Evt Exception thrown sent %s.%s @ %d", | |
1316 JvmtiTrace::safe_get_thread_name(thread), | |
1317 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), | |
1318 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), | |
1319 location - mh()->code_base() )); | |
1320 | |
1321 JvmtiEnv *env = ets->get_env(); | |
1322 JvmtiExceptionEventMark jem(thread, mh, location, exception_handle); | |
1323 | |
1324 // It's okay to clear these exceptions here because we duplicate | |
1325 // this lookup in InterpreterRuntime::exception_handler_for_exception. | |
1326 EXCEPTION_MARK; | |
1327 | |
1328 bool should_repeat; | |
1329 vframeStream st(thread); | |
1330 assert(!st.at_end(), "cannot be at end"); | |
1331 methodOop current_method = NULL; | |
1332 int current_bci = -1; | |
1333 do { | |
1334 current_method = st.method(); | |
1335 current_bci = st.bci(); | |
1336 do { | |
1337 should_repeat = false; | |
1338 KlassHandle eh_klass(thread, exception_handle()->klass()); | |
1339 current_bci = current_method->fast_exception_handler_bci_for( | |
1340 eh_klass, current_bci, THREAD); | |
1341 if (HAS_PENDING_EXCEPTION) { | |
1342 exception_handle = KlassHandle(thread, PENDING_EXCEPTION); | |
1343 CLEAR_PENDING_EXCEPTION; | |
1344 should_repeat = true; | |
1345 } | |
1346 } while (should_repeat && (current_bci != -1)); | |
1347 st.next(); | |
1348 } while ((current_bci < 0) && (!st.at_end())); | |
1349 | |
1350 jmethodID catch_jmethodID; | |
1351 if (current_bci < 0) { | |
1352 catch_jmethodID = 0; | |
1353 current_bci = 0; | |
1354 } else { | |
1355 catch_jmethodID = jem.to_jmethodID( | |
1356 methodHandle(thread, current_method)); | |
1357 } | |
1358 | |
1359 JvmtiJavaThreadEventTransition jet(thread); | |
1360 jvmtiEventException callback = env->callbacks()->Exception; | |
1361 if (callback != NULL) { | |
1362 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), | |
1363 jem.jni_methodID(), jem.location(), | |
1364 jem.exception(), | |
1365 catch_jmethodID, current_bci); | |
1366 } | |
1367 } | |
1368 } | |
1369 } | |
1370 | |
1371 // frames may get popped because of this throw, be safe - invalidate cached depth | |
1372 state->invalidate_cur_stack_depth(); | |
1373 } | |
1374 | |
1375 | |
1376 void JvmtiExport::notice_unwind_due_to_exception(JavaThread *thread, methodOop method, address location, oop exception, bool in_handler_frame) { | |
1377 HandleMark hm(thread); | |
1378 methodHandle mh(thread, method); | |
1379 Handle exception_handle(thread, exception); | |
1380 | |
1381 JvmtiThreadState *state = thread->jvmti_thread_state(); | |
1382 if (state == NULL) { | |
1383 return; | |
1384 } | |
1385 EVT_TRIG_TRACE(JVMTI_EVENT_EXCEPTION_CATCH, | |
1386 ("JVMTI [%s] Trg unwind_due_to_exception triggered %s.%s @ %s%d - %s", | |
1387 JvmtiTrace::safe_get_thread_name(thread), | |
1388 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), | |
1389 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), | |
1390 location==0? "no location:" : "", | |
1391 location==0? 0 : location - mh()->code_base(), | |
1392 in_handler_frame? "in handler frame" : "not handler frame" )); | |
1393 | |
1394 if (state->is_exception_detected()) { | |
1395 | |
1396 state->invalidate_cur_stack_depth(); | |
1397 if (!in_handler_frame) { | |
1398 // Not in exception handler. | |
1399 if(state->is_interp_only_mode()) { | |
1400 // method exit and frame pop events are posted only in interp mode. | |
1401 // When these events are enabled code should be in running in interp mode. | |
1402 JvmtiExport::post_method_exit(thread, method, thread->last_frame()); | |
1403 // The cached cur_stack_depth might have changed from the | |
1404 // operations of frame pop or method exit. We are not 100% sure | |
1405 // the cached cur_stack_depth is still valid depth so invalidate | |
1406 // it. | |
1407 state->invalidate_cur_stack_depth(); | |
1408 } | |
1409 } else { | |
1410 // In exception handler frame. Report exception catch. | |
1411 assert(location != NULL, "must be a known location"); | |
1412 // Update cur_stack_depth - the frames above the current frame | |
1413 // have been unwound due to this exception: | |
1414 assert(!state->is_exception_caught(), "exception must not be caught yet."); | |
1415 state->set_exception_caught(); | |
1416 | |
1417 JvmtiEnvThreadStateIterator it(state); | |
1418 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { | |
1419 if (ets->is_enabled(JVMTI_EVENT_EXCEPTION_CATCH) && (exception_handle() != NULL)) { | |
1420 EVT_TRACE(JVMTI_EVENT_EXCEPTION_CATCH, | |
1421 ("JVMTI [%s] Evt ExceptionCatch sent %s.%s @ %d", | |
1422 JvmtiTrace::safe_get_thread_name(thread), | |
1423 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), | |
1424 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), | |
1425 location - mh()->code_base() )); | |
1426 | |
1427 JvmtiEnv *env = ets->get_env(); | |
1428 JvmtiExceptionEventMark jem(thread, mh, location, exception_handle); | |
1429 JvmtiJavaThreadEventTransition jet(thread); | |
1430 jvmtiEventExceptionCatch callback = env->callbacks()->ExceptionCatch; | |
1431 if (callback != NULL) { | |
1432 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), | |
1433 jem.jni_methodID(), jem.location(), | |
1434 jem.exception()); | |
1435 } | |
1436 } | |
1437 } | |
1438 } | |
1439 } | |
1440 } | |
1441 | |
1442 oop JvmtiExport::jni_GetField_probe(JavaThread *thread, jobject jobj, oop obj, | |
1443 klassOop klass, jfieldID fieldID, bool is_static) { | |
1444 if (*((int *)get_field_access_count_addr()) > 0 && thread->has_last_Java_frame()) { | |
1445 // At least one field access watch is set so we have more work | |
1446 // to do. This wrapper is used by entry points that allow us | |
1447 // to create handles in post_field_access_by_jni(). | |
1448 post_field_access_by_jni(thread, obj, klass, fieldID, is_static); | |
1449 // event posting can block so refetch oop if we were passed a jobj | |
1450 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj); | |
1451 } | |
1452 return obj; | |
1453 } | |
1454 | |
1455 oop JvmtiExport::jni_GetField_probe_nh(JavaThread *thread, jobject jobj, oop obj, | |
1456 klassOop klass, jfieldID fieldID, bool is_static) { | |
1457 if (*((int *)get_field_access_count_addr()) > 0 && thread->has_last_Java_frame()) { | |
1458 // At least one field access watch is set so we have more work | |
1459 // to do. This wrapper is used by "quick" entry points that don't | |
1460 // allow us to create handles in post_field_access_by_jni(). We | |
1461 // override that with a ResetNoHandleMark. | |
1462 ResetNoHandleMark rnhm; | |
1463 post_field_access_by_jni(thread, obj, klass, fieldID, is_static); | |
1464 // event posting can block so refetch oop if we were passed a jobj | |
1465 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj); | |
1466 } | |
1467 return obj; | |
1468 } | |
1469 | |
1470 void JvmtiExport::post_field_access_by_jni(JavaThread *thread, oop obj, | |
1471 klassOop klass, jfieldID fieldID, bool is_static) { | |
1472 // We must be called with a Java context in order to provide reasonable | |
1473 // values for the klazz, method, and location fields. The callers of this | |
1474 // function don't make the call unless there is a Java context. | |
1475 assert(thread->has_last_Java_frame(), "must be called with a Java context"); | |
1476 | |
1477 ResourceMark rm; | |
1478 fieldDescriptor fd; | |
1479 // if get_field_descriptor finds fieldID to be invalid, then we just bail | |
1480 bool valid_fieldID = JvmtiEnv::get_field_descriptor(klass, fieldID, &fd); | |
1481 assert(valid_fieldID == true,"post_field_access_by_jni called with invalid fieldID"); | |
1482 if (!valid_fieldID) return; | |
1483 // field accesses are not watched so bail | |
1484 if (!fd.is_field_access_watched()) return; | |
1485 | |
1486 HandleMark hm(thread); | |
1487 KlassHandle h_klass(thread, klass); | |
1488 Handle h_obj; | |
1489 if (!is_static) { | |
1490 // non-static field accessors have an object, but we need a handle | |
1491 assert(obj != NULL, "non-static needs an object"); | |
1492 h_obj = Handle(thread, obj); | |
1493 } | |
1494 post_field_access(thread, | |
1495 thread->last_frame().interpreter_frame_method(), | |
1496 thread->last_frame().interpreter_frame_bcp(), | |
1497 h_klass, h_obj, fieldID); | |
1498 } | |
1499 | |
1500 void JvmtiExport::post_field_access(JavaThread *thread, methodOop method, | |
1501 address location, KlassHandle field_klass, Handle object, jfieldID field) { | |
1502 | |
1503 HandleMark hm(thread); | |
1504 methodHandle mh(thread, method); | |
1505 | |
1506 JvmtiThreadState *state = thread->jvmti_thread_state(); | |
1507 if (state == NULL) { | |
1508 return; | |
1509 } | |
1510 EVT_TRIG_TRACE(JVMTI_EVENT_FIELD_ACCESS, ("JVMTI [%s] Trg Field Access event triggered", | |
1511 JvmtiTrace::safe_get_thread_name(thread))); | |
1512 JvmtiEnvThreadStateIterator it(state); | |
1513 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { | |
1514 if (ets->is_enabled(JVMTI_EVENT_FIELD_ACCESS)) { | |
1515 EVT_TRACE(JVMTI_EVENT_FIELD_ACCESS, ("JVMTI [%s] Evt Field Access event sent %s.%s @ %d", | |
1516 JvmtiTrace::safe_get_thread_name(thread), | |
1517 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), | |
1518 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), | |
1519 location - mh()->code_base() )); | |
1520 | |
1521 JvmtiEnv *env = ets->get_env(); | |
1522 JvmtiLocationEventMark jem(thread, mh, location); | |
1523 jclass field_jclass = jem.to_jclass(field_klass()); | |
1524 jobject field_jobject = jem.to_jobject(object()); | |
1525 JvmtiJavaThreadEventTransition jet(thread); | |
1526 jvmtiEventFieldAccess callback = env->callbacks()->FieldAccess; | |
1527 if (callback != NULL) { | |
1528 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), | |
1529 jem.jni_methodID(), jem.location(), | |
1530 field_jclass, field_jobject, field); | |
1531 } | |
1532 } | |
1533 } | |
1534 } | |
1535 | |
1536 oop JvmtiExport::jni_SetField_probe(JavaThread *thread, jobject jobj, oop obj, | |
1537 klassOop klass, jfieldID fieldID, bool is_static, | |
1538 char sig_type, jvalue *value) { | |
1539 if (*((int *)get_field_modification_count_addr()) > 0 && thread->has_last_Java_frame()) { | |
1540 // At least one field modification watch is set so we have more work | |
1541 // to do. This wrapper is used by entry points that allow us | |
1542 // to create handles in post_field_modification_by_jni(). | |
1543 post_field_modification_by_jni(thread, obj, klass, fieldID, is_static, sig_type, value); | |
1544 // event posting can block so refetch oop if we were passed a jobj | |
1545 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj); | |
1546 } | |
1547 return obj; | |
1548 } | |
1549 | |
1550 oop JvmtiExport::jni_SetField_probe_nh(JavaThread *thread, jobject jobj, oop obj, | |
1551 klassOop klass, jfieldID fieldID, bool is_static, | |
1552 char sig_type, jvalue *value) { | |
1553 if (*((int *)get_field_modification_count_addr()) > 0 && thread->has_last_Java_frame()) { | |
1554 // At least one field modification watch is set so we have more work | |
1555 // to do. This wrapper is used by "quick" entry points that don't | |
1556 // allow us to create handles in post_field_modification_by_jni(). We | |
1557 // override that with a ResetNoHandleMark. | |
1558 ResetNoHandleMark rnhm; | |
1559 post_field_modification_by_jni(thread, obj, klass, fieldID, is_static, sig_type, value); | |
1560 // event posting can block so refetch oop if we were passed a jobj | |
1561 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj); | |
1562 } | |
1563 return obj; | |
1564 } | |
1565 | |
1566 void JvmtiExport::post_field_modification_by_jni(JavaThread *thread, oop obj, | |
1567 klassOop klass, jfieldID fieldID, bool is_static, | |
1568 char sig_type, jvalue *value) { | |
1569 // We must be called with a Java context in order to provide reasonable | |
1570 // values for the klazz, method, and location fields. The callers of this | |
1571 // function don't make the call unless there is a Java context. | |
1572 assert(thread->has_last_Java_frame(), "must be called with Java context"); | |
1573 | |
1574 ResourceMark rm; | |
1575 fieldDescriptor fd; | |
1576 // if get_field_descriptor finds fieldID to be invalid, then we just bail | |
1577 bool valid_fieldID = JvmtiEnv::get_field_descriptor(klass, fieldID, &fd); | |
1578 assert(valid_fieldID == true,"post_field_modification_by_jni called with invalid fieldID"); | |
1579 if (!valid_fieldID) return; | |
1580 // field modifications are not watched so bail | |
1581 if (!fd.is_field_modification_watched()) return; | |
1582 | |
1583 HandleMark hm(thread); | |
1584 | |
1585 Handle h_obj; | |
1586 if (!is_static) { | |
1587 // non-static field accessors have an object, but we need a handle | |
1588 assert(obj != NULL, "non-static needs an object"); | |
1589 h_obj = Handle(thread, obj); | |
1590 } | |
1591 KlassHandle h_klass(thread, klass); | |
1592 post_field_modification(thread, | |
1593 thread->last_frame().interpreter_frame_method(), | |
1594 thread->last_frame().interpreter_frame_bcp(), | |
1595 h_klass, h_obj, fieldID, sig_type, value); | |
1596 } | |
1597 | |
1598 void JvmtiExport::post_raw_field_modification(JavaThread *thread, methodOop method, | |
1599 address location, KlassHandle field_klass, Handle object, jfieldID field, | |
1600 char sig_type, jvalue *value) { | |
1601 | |
1602 if (sig_type == 'I' || sig_type == 'Z' || sig_type == 'C' || sig_type == 'S') { | |
1603 // 'I' instructions are used for byte, char, short and int. | |
1604 // determine which it really is, and convert | |
1605 fieldDescriptor fd; | |
1606 bool found = JvmtiEnv::get_field_descriptor(field_klass(), field, &fd); | |
1607 // should be found (if not, leave as is) | |
1608 if (found) { | |
1609 jint ival = value->i; | |
1610 // convert value from int to appropriate type | |
1611 switch (fd.field_type()) { | |
1612 case T_BOOLEAN: | |
1613 sig_type = 'Z'; | |
1614 value->i = 0; // clear it | |
1615 value->z = (jboolean)ival; | |
1616 break; | |
1617 case T_BYTE: | |
1618 sig_type = 'B'; | |
1619 value->i = 0; // clear it | |
1620 value->b = (jbyte)ival; | |
1621 break; | |
1622 case T_CHAR: | |
1623 sig_type = 'C'; | |
1624 value->i = 0; // clear it | |
1625 value->c = (jchar)ival; | |
1626 break; | |
1627 case T_SHORT: | |
1628 sig_type = 'S'; | |
1629 value->i = 0; // clear it | |
1630 value->s = (jshort)ival; | |
1631 break; | |
1632 case T_INT: | |
1633 // nothing to do | |
1634 break; | |
1635 default: | |
1636 // this is an integer instruction, should be one of above | |
1637 ShouldNotReachHere(); | |
1638 break; | |
1639 } | |
1640 } | |
1641 } | |
1642 | |
1643 // convert oop to JNI handle. | |
1644 if (sig_type == 'L' || sig_type == '[') { | |
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 (sig_type == 'L') { | |
1652 JNIHandles::destroy_local(value->l); | |
1653 } | |
1654 } | |
1655 | |
1656 void JvmtiExport::post_field_modification(JavaThread *thread, methodOop 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(methodOop 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 | |
1727 void JvmtiExport::post_compiled_method_load(nmethod *nm) { | |
1728 // If there are pending CompiledMethodUnload events then these are | |
1729 // posted before this CompiledMethodLoad event. We "lock" the nmethod and | |
1730 // maintain a handle to the methodOop to ensure that the nmethod isn't | |
1731 // flushed or unloaded while posting the events. | |
1732 JavaThread* thread = JavaThread::current(); | |
1733 if (have_pending_compiled_method_unload_events()) { | |
1734 methodHandle mh(thread, nm->method()); | |
1735 nmethodLocker nml(nm); | |
1736 post_pending_compiled_method_unload_events(); | |
1737 } | |
1738 | |
1739 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD, | |
1740 ("JVMTI [%s] method compile load event triggered", | |
1741 JvmtiTrace::safe_get_thread_name(thread))); | |
1742 | |
1743 JvmtiEnvIterator it; | |
1744 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { | |
1745 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_LOAD)) { | |
1746 | |
1747 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD, | |
1748 ("JVMTI [%s] class compile method load event sent %s.%s ", | |
1749 JvmtiTrace::safe_get_thread_name(thread), | |
1750 (nm->method() == NULL) ? "NULL" : nm->method()->klass_name()->as_C_string(), | |
1751 (nm->method() == NULL) ? "NULL" : nm->method()->name()->as_C_string())); | |
1752 | |
1753 ResourceMark rm(thread); | |
1754 JvmtiCompiledMethodLoadEventMark jem(thread, nm); | |
1755 JvmtiJavaThreadEventTransition jet(thread); | |
1756 jvmtiEventCompiledMethodLoad callback = env->callbacks()->CompiledMethodLoad; | |
1757 if (callback != NULL) { | |
1758 (*callback)(env->jvmti_external(), jem.jni_methodID(), | |
1759 jem.code_size(), jem.code_data(), jem.map_length(), | |
1760 jem.map(), jem.compile_info()); | |
1761 } | |
1762 } | |
1763 } | |
1764 } | |
1765 | |
1766 | |
1767 // post a COMPILED_METHOD_LOAD event for a given environment | |
1768 void JvmtiExport::post_compiled_method_load(JvmtiEnv* env, const jmethodID method, const jint length, | |
1769 const void *code_begin, const jint map_length, | |
1770 const jvmtiAddrLocationMap* map) | |
1771 { | |
1772 JavaThread* thread = JavaThread::current(); | |
1773 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD, | |
1774 ("JVMTI [%s] method compile load event triggered (by GenerateEvents)", | |
1775 JvmtiTrace::safe_get_thread_name(thread))); | |
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 (by GenerateEvents), jmethodID=" PTR_FORMAT, | |
1780 JvmtiTrace::safe_get_thread_name(thread), method)); | |
1781 | |
1782 JvmtiEventMark jem(thread); | |
1783 JvmtiJavaThreadEventTransition jet(thread); | |
1784 jvmtiEventCompiledMethodLoad callback = env->callbacks()->CompiledMethodLoad; | |
1785 if (callback != NULL) { | |
1786 (*callback)(env->jvmti_external(), method, | |
1787 length, code_begin, map_length, | |
1788 map, NULL); | |
1789 } | |
1790 } | |
1791 } | |
1792 | |
1793 // used at a safepoint to post a CompiledMethodUnload event | |
1794 void JvmtiExport::post_compiled_method_unload_at_safepoint(jmethodID mid, const void *code_begin) { | |
1795 assert(SafepointSynchronize::is_at_safepoint(), "must be executed at a safepoint"); | |
1796 | |
1797 // create list lazily | |
1798 if (_pending_compiled_method_unload_method_ids == NULL) { | |
1799 _pending_compiled_method_unload_method_ids = new (ResourceObj::C_HEAP) GrowableArray<jmethodID>(10,true); | |
1800 _pending_compiled_method_unload_code_begins = new (ResourceObj::C_HEAP) GrowableArray<const void *>(10,true); | |
1801 } | |
1802 _pending_compiled_method_unload_method_ids->append(mid); | |
1803 _pending_compiled_method_unload_code_begins->append(code_begin); | |
1804 _have_pending_compiled_method_unload_events = true; | |
1805 } | |
1806 | |
1807 void JvmtiExport::post_dynamic_code_generated_internal(const char *name, const void *code_begin, const void *code_end) { | |
1808 JavaThread* thread = JavaThread::current(); | |
1809 EVT_TRIG_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED, | |
1810 ("JVMTI [%s] method dynamic code generated event triggered", | |
1811 JvmtiTrace::safe_get_thread_name(thread))); | |
1812 JvmtiEnvIterator it; | |
1813 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { | |
1814 if (env->is_enabled(JVMTI_EVENT_DYNAMIC_CODE_GENERATED)) { | |
1815 EVT_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED, | |
1816 ("JVMTI [%s] dynamic code generated event sent for %s", | |
1817 JvmtiTrace::safe_get_thread_name(thread), name)); | |
1818 JvmtiEventMark jem(thread); | |
1819 JvmtiJavaThreadEventTransition jet(thread); | |
1820 jint length = (jint)pointer_delta(code_end, code_begin, sizeof(char)); | |
1821 jvmtiEventDynamicCodeGenerated callback = env->callbacks()->DynamicCodeGenerated; | |
1822 if (callback != NULL) { | |
1823 (*callback)(env->jvmti_external(), name, (void*)code_begin, length); | |
1824 } | |
1825 } | |
1826 } | |
1827 } | |
1828 | |
1829 void JvmtiExport::post_dynamic_code_generated(const char *name, const void *code_begin, const void *code_end) { | |
1830 // In theory everyone coming thru here is in_vm but we need to be certain | |
1831 // because a callee will do a vm->native transition | |
1832 ThreadInVMfromUnknown __tiv; | |
1833 jvmtiPhase phase = JvmtiEnv::get_phase(); | |
1834 if (phase == JVMTI_PHASE_PRIMORDIAL || phase == JVMTI_PHASE_START) { | |
1835 post_dynamic_code_generated_internal(name, code_begin, code_end); | |
1836 return; | |
1837 } | |
1838 | |
1839 if (have_pending_compiled_method_unload_events()) { | |
1840 post_pending_compiled_method_unload_events(); | |
1841 } | |
1842 post_dynamic_code_generated_internal(name, code_begin, code_end); | |
1843 } | |
1844 | |
1845 | |
1846 // post a DYNAMIC_CODE_GENERATED event for a given environment | |
1847 // used by GenerateEvents | |
1848 void JvmtiExport::post_dynamic_code_generated(JvmtiEnv* env, const char *name, | |
1849 const void *code_begin, const void *code_end) | |
1850 { | |
1851 JavaThread* thread = JavaThread::current(); | |
1852 EVT_TRIG_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED, | |
1853 ("JVMTI [%s] dynamic code generated event triggered (by GenerateEvents)", | |
1854 JvmtiTrace::safe_get_thread_name(thread))); | |
1855 if (env->is_enabled(JVMTI_EVENT_DYNAMIC_CODE_GENERATED)) { | |
1856 EVT_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED, | |
1857 ("JVMTI [%s] dynamic code generated event sent for %s", | |
1858 JvmtiTrace::safe_get_thread_name(thread), name)); | |
1859 JvmtiEventMark jem(thread); | |
1860 JvmtiJavaThreadEventTransition jet(thread); | |
1861 jint length = (jint)pointer_delta(code_end, code_begin, sizeof(char)); | |
1862 jvmtiEventDynamicCodeGenerated callback = env->callbacks()->DynamicCodeGenerated; | |
1863 if (callback != NULL) { | |
1864 (*callback)(env->jvmti_external(), name, (void*)code_begin, length); | |
1865 } | |
1866 } | |
1867 } | |
1868 | |
1869 // post a DynamicCodeGenerated event while holding locks in the VM. | |
1870 void JvmtiExport::post_dynamic_code_generated_while_holding_locks(const char* name, | |
1871 address code_begin, address code_end) | |
1872 { | |
1873 // register the stub with the current dynamic code event collector | |
1874 JvmtiThreadState* state = JvmtiThreadState::state_for(JavaThread::current()); | |
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1875 // state can only be NULL if the current thread is exiting which |
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1876 // should not happen since we're trying to post an event |
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1877 guarantee(state != NULL, "attempt to register stub via an exiting thread"); |
0 | 1878 JvmtiDynamicCodeEventCollector* collector = state->get_dynamic_code_event_collector(); |
1879 guarantee(collector != NULL, "attempt to register stub without event collector"); | |
1880 collector->register_stub(name, code_begin, code_end); | |
1881 } | |
1882 | |
1883 // Collect all the vm internally allocated objects which are visible to java world | |
1884 void JvmtiExport::record_vm_internal_object_allocation(oop obj) { | |
1885 Thread* thread = ThreadLocalStorage::thread(); | |
1886 if (thread != NULL && thread->is_Java_thread()) { | |
1887 // Can not take safepoint here. | |
1888 No_Safepoint_Verifier no_sfpt; | |
1889 // Can not take safepoint here so can not use state_for to get | |
1890 // jvmti thread state. | |
1891 JvmtiThreadState *state = ((JavaThread*)thread)->jvmti_thread_state(); | |
1892 if (state != NULL ) { | |
1893 // state is non NULL when VMObjectAllocEventCollector is enabled. | |
1894 JvmtiVMObjectAllocEventCollector *collector; | |
1895 collector = state->get_vm_object_alloc_event_collector(); | |
1896 if (collector != NULL && collector->is_enabled()) { | |
1897 // Don't record classes as these will be notified via the ClassLoad | |
1898 // event. | |
1899 if (obj->klass() != SystemDictionary::class_klass()) { | |
1900 collector->record_allocation(obj); | |
1901 } | |
1902 } | |
1903 } | |
1904 } | |
1905 } | |
1906 | |
1907 void JvmtiExport::post_garbage_collection_finish() { | |
1908 Thread *thread = Thread::current(); // this event is posted from VM-Thread. | |
1909 EVT_TRIG_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH, | |
1910 ("JVMTI [%s] garbage collection finish event triggered", | |
1911 JvmtiTrace::safe_get_thread_name(thread))); | |
1912 JvmtiEnvIterator it; | |
1913 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { | |
1914 if (env->is_enabled(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH)) { | |
1915 EVT_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH, | |
1916 ("JVMTI [%s] garbage collection finish event sent ", | |
1917 JvmtiTrace::safe_get_thread_name(thread))); | |
1918 JvmtiThreadEventTransition jet(thread); | |
1919 // JNIEnv is NULL here because this event is posted from VM Thread | |
1920 jvmtiEventGarbageCollectionFinish callback = env->callbacks()->GarbageCollectionFinish; | |
1921 if (callback != NULL) { | |
1922 (*callback)(env->jvmti_external()); | |
1923 } | |
1924 } | |
1925 } | |
1926 } | |
1927 | |
1928 void JvmtiExport::post_garbage_collection_start() { | |
1929 Thread* thread = Thread::current(); // this event is posted from vm-thread. | |
1930 EVT_TRIG_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_START, | |
1931 ("JVMTI [%s] garbage collection start event triggered", | |
1932 JvmtiTrace::safe_get_thread_name(thread))); | |
1933 JvmtiEnvIterator it; | |
1934 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { | |
1935 if (env->is_enabled(JVMTI_EVENT_GARBAGE_COLLECTION_START)) { | |
1936 EVT_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_START, | |
1937 ("JVMTI [%s] garbage collection start event sent ", | |
1938 JvmtiTrace::safe_get_thread_name(thread))); | |
1939 JvmtiThreadEventTransition jet(thread); | |
1940 // JNIEnv is NULL here because this event is posted from VM Thread | |
1941 jvmtiEventGarbageCollectionStart callback = env->callbacks()->GarbageCollectionStart; | |
1942 if (callback != NULL) { | |
1943 (*callback)(env->jvmti_external()); | |
1944 } | |
1945 } | |
1946 } | |
1947 } | |
1948 | |
1949 void JvmtiExport::post_data_dump() { | |
1950 Thread *thread = Thread::current(); | |
1951 EVT_TRIG_TRACE(JVMTI_EVENT_DATA_DUMP_REQUEST, | |
1952 ("JVMTI [%s] data dump request event triggered", | |
1953 JvmtiTrace::safe_get_thread_name(thread))); | |
1954 JvmtiEnvIterator it; | |
1955 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { | |
1956 if (env->is_enabled(JVMTI_EVENT_DATA_DUMP_REQUEST)) { | |
1957 EVT_TRACE(JVMTI_EVENT_DATA_DUMP_REQUEST, | |
1958 ("JVMTI [%s] data dump request event sent ", | |
1959 JvmtiTrace::safe_get_thread_name(thread))); | |
1960 JvmtiThreadEventTransition jet(thread); | |
1961 // JNIEnv is NULL here because this event is posted from VM Thread | |
1962 jvmtiEventDataDumpRequest callback = env->callbacks()->DataDumpRequest; | |
1963 if (callback != NULL) { | |
1964 (*callback)(env->jvmti_external()); | |
1965 } | |
1966 } | |
1967 } | |
1968 } | |
1969 | |
1970 void JvmtiExport::post_monitor_contended_enter(JavaThread *thread, ObjectMonitor *obj_mntr) { | |
1971 oop object = (oop)obj_mntr->object(); | |
1972 if (!ServiceUtil::visible_oop(object)) { | |
1973 // Ignore monitor contended enter for vm internal object. | |
1974 return; | |
1975 } | |
1976 JvmtiThreadState *state = thread->jvmti_thread_state(); | |
1977 if (state == NULL) { | |
1978 return; | |
1979 } | |
1980 | |
1981 HandleMark hm(thread); | |
1982 Handle h(thread, object); | |
1983 | |
1984 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTER, | |
1985 ("JVMTI [%s] montior contended enter event triggered", | |
1986 JvmtiTrace::safe_get_thread_name(thread))); | |
1987 | |
1988 JvmtiEnvThreadStateIterator it(state); | |
1989 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { | |
1990 if (ets->is_enabled(JVMTI_EVENT_MONITOR_CONTENDED_ENTER)) { | |
1991 EVT_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTER, | |
1992 ("JVMTI [%s] monitor contended enter event sent", | |
1993 JvmtiTrace::safe_get_thread_name(thread))); | |
1994 JvmtiMonitorEventMark jem(thread, h()); | |
1995 JvmtiEnv *env = ets->get_env(); | |
1996 JvmtiThreadEventTransition jet(thread); | |
1997 jvmtiEventMonitorContendedEnter callback = env->callbacks()->MonitorContendedEnter; | |
1998 if (callback != NULL) { | |
1999 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_object()); | |
2000 } | |
2001 } | |
2002 } | |
2003 } | |
2004 | |
2005 void JvmtiExport::post_monitor_contended_entered(JavaThread *thread, ObjectMonitor *obj_mntr) { | |
2006 oop object = (oop)obj_mntr->object(); | |
2007 if (!ServiceUtil::visible_oop(object)) { | |
2008 // Ignore monitor contended entered for vm internal object. | |
2009 return; | |
2010 } | |
2011 JvmtiThreadState *state = thread->jvmti_thread_state(); | |
2012 if (state == NULL) { | |
2013 return; | |
2014 } | |
2015 | |
2016 HandleMark hm(thread); | |
2017 Handle h(thread, object); | |
2018 | |
2019 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED, | |
2020 ("JVMTI [%s] montior contended entered event triggered", | |
2021 JvmtiTrace::safe_get_thread_name(thread))); | |
2022 | |
2023 JvmtiEnvThreadStateIterator it(state); | |
2024 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { | |
2025 if (ets->is_enabled(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED)) { | |
2026 EVT_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED, | |
2027 ("JVMTI [%s] monitor contended enter event sent", | |
2028 JvmtiTrace::safe_get_thread_name(thread))); | |
2029 JvmtiMonitorEventMark jem(thread, h()); | |
2030 JvmtiEnv *env = ets->get_env(); | |
2031 JvmtiThreadEventTransition jet(thread); | |
2032 jvmtiEventMonitorContendedEntered callback = env->callbacks()->MonitorContendedEntered; | |
2033 if (callback != NULL) { | |
2034 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_object()); | |
2035 } | |
2036 } | |
2037 } | |
2038 } | |
2039 | |
2040 void JvmtiExport::post_monitor_wait(JavaThread *thread, oop object, | |
2041 jlong timeout) { | |
2042 JvmtiThreadState *state = thread->jvmti_thread_state(); | |
2043 if (state == NULL) { | |
2044 return; | |
2045 } | |
2046 | |
2047 HandleMark hm(thread); | |
2048 Handle h(thread, object); | |
2049 | |
2050 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_WAIT, | |
2051 ("JVMTI [%s] montior wait event triggered", | |
2052 JvmtiTrace::safe_get_thread_name(thread))); | |
2053 | |
2054 JvmtiEnvThreadStateIterator it(state); | |
2055 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { | |
2056 if (ets->is_enabled(JVMTI_EVENT_MONITOR_WAIT)) { | |
2057 EVT_TRACE(JVMTI_EVENT_MONITOR_WAIT, | |
2058 ("JVMTI [%s] monitor wait event sent ", | |
2059 JvmtiTrace::safe_get_thread_name(thread))); | |
2060 JvmtiMonitorEventMark jem(thread, h()); | |
2061 JvmtiEnv *env = ets->get_env(); | |
2062 JvmtiThreadEventTransition jet(thread); | |
2063 jvmtiEventMonitorWait callback = env->callbacks()->MonitorWait; | |
2064 if (callback != NULL) { | |
2065 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), | |
2066 jem.jni_object(), timeout); | |
2067 } | |
2068 } | |
2069 } | |
2070 } | |
2071 | |
2072 void JvmtiExport::post_monitor_waited(JavaThread *thread, ObjectMonitor *obj_mntr, jboolean timed_out) { | |
2073 oop object = (oop)obj_mntr->object(); | |
2074 if (!ServiceUtil::visible_oop(object)) { | |
2075 // Ignore monitor waited for vm internal object. | |
2076 return; | |
2077 } | |
2078 JvmtiThreadState *state = thread->jvmti_thread_state(); | |
2079 if (state == NULL) { | |
2080 return; | |
2081 } | |
2082 | |
2083 HandleMark hm(thread); | |
2084 Handle h(thread, object); | |
2085 | |
2086 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_WAITED, | |
2087 ("JVMTI [%s] montior waited event triggered", | |
2088 JvmtiTrace::safe_get_thread_name(thread))); | |
2089 | |
2090 JvmtiEnvThreadStateIterator it(state); | |
2091 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { | |
2092 if (ets->is_enabled(JVMTI_EVENT_MONITOR_WAITED)) { | |
2093 EVT_TRACE(JVMTI_EVENT_MONITOR_WAITED, | |
2094 ("JVMTI [%s] monitor waited event sent ", | |
2095 JvmtiTrace::safe_get_thread_name(thread))); | |
2096 JvmtiMonitorEventMark jem(thread, h()); | |
2097 JvmtiEnv *env = ets->get_env(); | |
2098 JvmtiThreadEventTransition jet(thread); | |
2099 jvmtiEventMonitorWaited callback = env->callbacks()->MonitorWaited; | |
2100 if (callback != NULL) { | |
2101 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), | |
2102 jem.jni_object(), timed_out); | |
2103 } | |
2104 } | |
2105 } | |
2106 } | |
2107 | |
2108 | |
2109 void JvmtiExport::post_vm_object_alloc(JavaThread *thread, oop object) { | |
2110 EVT_TRIG_TRACE(JVMTI_EVENT_VM_OBJECT_ALLOC, ("JVMTI [%s] Trg vm object alloc triggered", | |
2111 JvmtiTrace::safe_get_thread_name(thread))); | |
2112 if (object == NULL) { | |
2113 return; | |
2114 } | |
2115 HandleMark hm(thread); | |
2116 Handle h(thread, object); | |
2117 JvmtiEnvIterator it; | |
2118 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { | |
2119 if (env->is_enabled(JVMTI_EVENT_VM_OBJECT_ALLOC)) { | |
2120 EVT_TRACE(JVMTI_EVENT_VM_OBJECT_ALLOC, ("JVMTI [%s] Evt vmobject alloc sent %s", | |
2121 JvmtiTrace::safe_get_thread_name(thread), | |
2122 object==NULL? "NULL" : Klass::cast(java_lang_Class::as_klassOop(object))->external_name())); | |
2123 | |
2124 JvmtiVMObjectAllocEventMark jem(thread, h()); | |
2125 JvmtiJavaThreadEventTransition jet(thread); | |
2126 jvmtiEventVMObjectAlloc callback = env->callbacks()->VMObjectAlloc; | |
2127 if (callback != NULL) { | |
2128 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), | |
2129 jem.jni_jobject(), jem.jni_class(), jem.size()); | |
2130 } | |
2131 } | |
2132 } | |
2133 } | |
2134 | |
2135 //////////////////////////////////////////////////////////////////////////////////////////////// | |
2136 | |
2137 void JvmtiExport::cleanup_thread(JavaThread* thread) { | |
2138 assert(JavaThread::current() == thread, "thread is not current"); | |
2139 | |
2140 | |
2141 // This has to happen after the thread state is removed, which is | |
2142 // why it is not in post_thread_end_event like its complement | |
2143 // Maybe both these functions should be rolled into the posts? | |
2144 JvmtiEventController::thread_ended(thread); | |
2145 } | |
2146 | |
2147 void JvmtiExport::oops_do(OopClosure* f) { | |
2148 JvmtiCurrentBreakpoints::oops_do(f); | |
2149 JvmtiVMObjectAllocEventCollector::oops_do_for_all_threads(f); | |
2150 } | |
2151 | |
2152 // Onload raw monitor transition. | |
2153 void JvmtiExport::transition_pending_onload_raw_monitors() { | |
2154 JvmtiPendingMonitors::transition_raw_monitors(); | |
2155 } | |
2156 | |
2157 //////////////////////////////////////////////////////////////////////////////////////////////// | |
2158 | |
2159 // type for the Agent_OnAttach entry point | |
2160 extern "C" { | |
2161 typedef jint (JNICALL *OnAttachEntry_t)(JavaVM*, char *, void *); | |
2162 } | |
2163 | |
2164 #ifndef SERVICES_KERNEL | |
2165 jint JvmtiExport::load_agent_library(AttachOperation* op, outputStream* st) { | |
2166 char ebuf[1024]; | |
2167 char buffer[JVM_MAXPATHLEN]; | |
2168 void* library; | |
2169 jint result = JNI_ERR; | |
2170 | |
2171 // get agent name and options | |
2172 const char* agent = op->arg(0); | |
2173 const char* absParam = op->arg(1); | |
2174 const char* options = op->arg(2); | |
2175 | |
2176 // The abs paramter should be "true" or "false" | |
2177 bool is_absolute_path = (absParam != NULL) && (strcmp(absParam,"true")==0); | |
2178 | |
2179 | |
2180 // If the path is absolute we attempt to load the library. Otherwise we try to | |
2181 // load it from the standard dll directory. | |
2182 | |
2183 if (is_absolute_path) { | |
2184 library = hpi::dll_load(agent, ebuf, sizeof ebuf); | |
2185 } else { | |
2186 // Try to load the agent from the standard dll directory | |
2187 hpi::dll_build_name(buffer, sizeof(buffer), Arguments::get_dll_dir(), agent); | |
2188 library = hpi::dll_load(buffer, ebuf, sizeof ebuf); | |
2189 if (library == NULL) { | |
2190 // not found - try local path | |
2191 char ns[1] = {0}; | |
2192 hpi::dll_build_name(buffer, sizeof(buffer), ns, agent); | |
2193 library = hpi::dll_load(buffer, ebuf, sizeof ebuf); | |
2194 } | |
2195 } | |
2196 | |
2197 // If the library was loaded then we attempt to invoke the Agent_OnAttach | |
2198 // function | |
2199 if (library != NULL) { | |
2200 | |
2201 // Lookup the Agent_OnAttach function | |
2202 OnAttachEntry_t on_attach_entry = NULL; | |
2203 const char *on_attach_symbols[] = AGENT_ONATTACH_SYMBOLS; | |
2204 for (uint symbol_index = 0; symbol_index < ARRAY_SIZE(on_attach_symbols); symbol_index++) { | |
2205 on_attach_entry = | |
2206 CAST_TO_FN_PTR(OnAttachEntry_t, hpi::dll_lookup(library, on_attach_symbols[symbol_index])); | |
2207 if (on_attach_entry != NULL) break; | |
2208 } | |
2209 | |
2210 if (on_attach_entry == NULL) { | |
2211 // Agent_OnAttach missing - unload library | |
2212 hpi::dll_unload(library); | |
2213 } else { | |
2214 // Invoke the Agent_OnAttach function | |
2215 JavaThread* THREAD = JavaThread::current(); | |
2216 { | |
2217 extern struct JavaVM_ main_vm; | |
2218 JvmtiThreadEventMark jem(THREAD); | |
2219 JvmtiJavaThreadEventTransition jet(THREAD); | |
2220 | |
2221 result = (*on_attach_entry)(&main_vm, (char*)options, NULL); | |
2222 } | |
2223 | |
2224 // Agent_OnAttach may have used JNI | |
2225 if (HAS_PENDING_EXCEPTION) { | |
2226 CLEAR_PENDING_EXCEPTION; | |
2227 } | |
2228 | |
2229 // If OnAttach returns JNI_OK then we add it to the list of | |
2230 // agent libraries so that we can call Agent_OnUnload later. | |
2231 if (result == JNI_OK) { | |
2232 Arguments::add_loaded_agent(agent, (char*)options, is_absolute_path, library); | |
2233 } | |
2234 | |
2235 // Agent_OnAttach executed so completion status is JNI_OK | |
2236 st->print_cr("%d", result); | |
2237 result = JNI_OK; | |
2238 } | |
2239 } | |
2240 return result; | |
2241 } | |
2242 #endif // SERVICES_KERNEL | |
2243 | |
2244 // CMS has completed referencing processing so may need to update | |
2245 // tag maps. | |
2246 void JvmtiExport::cms_ref_processing_epilogue() { | |
2247 if (JvmtiEnv::environments_might_exist()) { | |
2248 JvmtiTagMap::cms_ref_processing_epilogue(); | |
2249 } | |
2250 } | |
2251 | |
2252 | |
2253 //////////////////////////////////////////////////////////////////////////////////////////////// | |
2254 | |
2255 // Setup current current thread for event collection. | |
2256 void JvmtiEventCollector::setup_jvmti_thread_state() { | |
2257 // set this event collector to be the current one. | |
2258 JvmtiThreadState* state = JvmtiThreadState::state_for(JavaThread::current()); | |
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2259 // state can only be NULL if the current thread is exiting which |
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2260 // should not happen since we're trying to configure for event collection |
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2261 guarantee(state != NULL, "exiting thread called setup_jvmti_thread_state"); |
0 | 2262 if (is_vm_object_alloc_event()) { |
2263 _prev = state->get_vm_object_alloc_event_collector(); | |
2264 state->set_vm_object_alloc_event_collector((JvmtiVMObjectAllocEventCollector *)this); | |
2265 } else if (is_dynamic_code_event()) { | |
2266 _prev = state->get_dynamic_code_event_collector(); | |
2267 state->set_dynamic_code_event_collector((JvmtiDynamicCodeEventCollector *)this); | |
2268 } | |
2269 } | |
2270 | |
2271 // Unset current event collection in this thread and reset it with previous | |
2272 // collector. | |
2273 void JvmtiEventCollector::unset_jvmti_thread_state() { | |
2274 JvmtiThreadState* state = JavaThread::current()->jvmti_thread_state(); | |
2275 if (state != NULL) { | |
2276 // restore the previous event collector (if any) | |
2277 if (is_vm_object_alloc_event()) { | |
2278 if (state->get_vm_object_alloc_event_collector() == this) { | |
2279 state->set_vm_object_alloc_event_collector((JvmtiVMObjectAllocEventCollector *)_prev); | |
2280 } else { | |
2281 // this thread's jvmti state was created during the scope of | |
2282 // the event collector. | |
2283 } | |
2284 } else { | |
2285 if (is_dynamic_code_event()) { | |
2286 if (state->get_dynamic_code_event_collector() == this) { | |
2287 state->set_dynamic_code_event_collector((JvmtiDynamicCodeEventCollector *)_prev); | |
2288 } else { | |
2289 // this thread's jvmti state was created during the scope of | |
2290 // the event collector. | |
2291 } | |
2292 } | |
2293 } | |
2294 } | |
2295 } | |
2296 | |
2297 // create the dynamic code event collector | |
2298 JvmtiDynamicCodeEventCollector::JvmtiDynamicCodeEventCollector() : _code_blobs(NULL) { | |
2299 if (JvmtiExport::should_post_dynamic_code_generated()) { | |
2300 setup_jvmti_thread_state(); | |
2301 } | |
2302 } | |
2303 | |
2304 // iterate over any code blob descriptors collected and post a | |
2305 // DYNAMIC_CODE_GENERATED event to the profiler. | |
2306 JvmtiDynamicCodeEventCollector::~JvmtiDynamicCodeEventCollector() { | |
2307 assert(!JavaThread::current()->owns_locks(), "all locks must be released to post deferred events"); | |
2308 // iterate over any code blob descriptors that we collected | |
2309 if (_code_blobs != NULL) { | |
2310 for (int i=0; i<_code_blobs->length(); i++) { | |
2311 JvmtiCodeBlobDesc* blob = _code_blobs->at(i); | |
2312 JvmtiExport::post_dynamic_code_generated(blob->name(), blob->code_begin(), blob->code_end()); | |
2313 FreeHeap(blob); | |
2314 } | |
2315 delete _code_blobs; | |
2316 } | |
2317 unset_jvmti_thread_state(); | |
2318 } | |
2319 | |
2320 // register a stub | |
2321 void JvmtiDynamicCodeEventCollector::register_stub(const char* name, address start, address end) { | |
2322 if (_code_blobs == NULL) { | |
2323 _code_blobs = new (ResourceObj::C_HEAP) GrowableArray<JvmtiCodeBlobDesc*>(1,true); | |
2324 } | |
2325 _code_blobs->append(new JvmtiCodeBlobDesc(name, start, end)); | |
2326 } | |
2327 | |
2328 // Setup current thread to record vm allocated objects. | |
2329 JvmtiVMObjectAllocEventCollector::JvmtiVMObjectAllocEventCollector() : _allocated(NULL) { | |
2330 if (JvmtiExport::should_post_vm_object_alloc()) { | |
2331 _enable = true; | |
2332 setup_jvmti_thread_state(); | |
2333 } else { | |
2334 _enable = false; | |
2335 } | |
2336 } | |
2337 | |
2338 // Post vm_object_alloc event for vm allocated objects visible to java | |
2339 // world. | |
2340 JvmtiVMObjectAllocEventCollector::~JvmtiVMObjectAllocEventCollector() { | |
2341 if (_allocated != NULL) { | |
2342 set_enabled(false); | |
2343 for (int i = 0; i < _allocated->length(); i++) { | |
2344 oop obj = _allocated->at(i); | |
2345 if (ServiceUtil::visible_oop(obj)) { | |
2346 JvmtiExport::post_vm_object_alloc(JavaThread::current(), obj); | |
2347 } | |
2348 } | |
2349 delete _allocated; | |
2350 } | |
2351 unset_jvmti_thread_state(); | |
2352 } | |
2353 | |
2354 void JvmtiVMObjectAllocEventCollector::record_allocation(oop obj) { | |
2355 assert(is_enabled(), "VM object alloc event collector is not enabled"); | |
2356 if (_allocated == NULL) { | |
2357 _allocated = new (ResourceObj::C_HEAP) GrowableArray<oop>(1, true); | |
2358 } | |
2359 _allocated->push(obj); | |
2360 } | |
2361 | |
2362 // GC support. | |
2363 void JvmtiVMObjectAllocEventCollector::oops_do(OopClosure* f) { | |
2364 if (_allocated != NULL) { | |
2365 for(int i=_allocated->length() - 1; i >= 0; i--) { | |
2366 if (_allocated->at(i) != NULL) { | |
2367 f->do_oop(_allocated->adr_at(i)); | |
2368 } | |
2369 } | |
2370 } | |
2371 } | |
2372 | |
2373 void JvmtiVMObjectAllocEventCollector::oops_do_for_all_threads(OopClosure* f) { | |
2374 // no-op if jvmti not enabled | |
2375 if (!JvmtiEnv::environments_might_exist()) { | |
2376 return; | |
2377 } | |
2378 | |
2379 // Runs at safepoint. So no need to acquire Threads_lock. | |
2380 for (JavaThread *jthr = Threads::first(); jthr != NULL; jthr = jthr->next()) { | |
2381 JvmtiThreadState *state = jthr->jvmti_thread_state(); | |
2382 if (state != NULL) { | |
2383 JvmtiVMObjectAllocEventCollector *collector; | |
2384 collector = state->get_vm_object_alloc_event_collector(); | |
2385 while (collector != NULL) { | |
2386 collector->oops_do(f); | |
2387 collector = (JvmtiVMObjectAllocEventCollector *)collector->get_prev(); | |
2388 } | |
2389 } | |
2390 } | |
2391 } | |
2392 | |
2393 | |
2394 // Disable collection of VMObjectAlloc events | |
2395 NoJvmtiVMObjectAllocMark::NoJvmtiVMObjectAllocMark() : _collector(NULL) { | |
2396 // a no-op if VMObjectAlloc event is not enabled | |
2397 if (!JvmtiExport::should_post_vm_object_alloc()) { | |
2398 return; | |
2399 } | |
2400 Thread* thread = ThreadLocalStorage::thread(); | |
2401 if (thread != NULL && thread->is_Java_thread()) { | |
2402 JavaThread* current_thread = (JavaThread*)thread; | |
2403 JvmtiThreadState *state = current_thread->jvmti_thread_state(); | |
2404 if (state != NULL) { | |
2405 JvmtiVMObjectAllocEventCollector *collector; | |
2406 collector = state->get_vm_object_alloc_event_collector(); | |
2407 if (collector != NULL && collector->is_enabled()) { | |
2408 _collector = collector; | |
2409 _collector->set_enabled(false); | |
2410 } | |
2411 } | |
2412 } | |
2413 } | |
2414 | |
2415 // Re-Enable collection of VMObjectAlloc events (if previously enabled) | |
2416 NoJvmtiVMObjectAllocMark::~NoJvmtiVMObjectAllocMark() { | |
2417 if (was_enabled()) { | |
2418 _collector->set_enabled(true); | |
2419 } | |
2420 }; | |
2421 | |
2422 JvmtiGCMarker::JvmtiGCMarker(bool full) : _full(full), _invocation_count(0) { | |
2423 assert(Thread::current()->is_VM_thread(), "wrong thread"); | |
2424 | |
2425 // if there aren't any JVMTI environments then nothing to do | |
2426 if (!JvmtiEnv::environments_might_exist()) { | |
2427 return; | |
2428 } | |
2429 | |
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2430 if (ForceFullGCJVMTIEpilogues) { |
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2431 // force 'Full GC' was done semantics for JVMTI GC epilogues |
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2432 _full = true; |
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2433 } |
2b4230d1e589
6862295: JDWP threadid changes during debugging session (leading to ingored breakpoints)
dcubed
parents:
342
diff
changeset
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2434 |
0 | 2435 // GarbageCollectionStart event posted from VM thread - okay because |
2436 // JVMTI is clear that the "world is stopped" and callback shouldn't | |
2437 // try to call into the VM. | |
2438 if (JvmtiExport::should_post_garbage_collection_start()) { | |
2439 JvmtiExport::post_garbage_collection_start(); | |
2440 } | |
2441 | |
2442 // if "full" is false it probably means this is a scavenge of the young | |
2443 // generation. However it could turn out that a "full" GC is required | |
2444 // so we record the number of collections so that it can be checked in | |
2445 // the destructor. | |
2446 if (!_full) { | |
342 | 2447 _invocation_count = Universe::heap()->total_full_collections(); |
0 | 2448 } |
2449 | |
2450 // Do clean up tasks that need to be done at a safepoint | |
2451 JvmtiEnvBase::check_for_periodic_clean_up(); | |
2452 } | |
2453 | |
2454 JvmtiGCMarker::~JvmtiGCMarker() { | |
2455 // if there aren't any JVMTI environments then nothing to do | |
2456 if (!JvmtiEnv::environments_might_exist()) { | |
2457 return; | |
2458 } | |
2459 | |
2460 // JVMTI notify gc finish | |
2461 if (JvmtiExport::should_post_garbage_collection_finish()) { | |
2462 JvmtiExport::post_garbage_collection_finish(); | |
2463 } | |
2464 | |
2465 // we might have initially started out doing a scavenge of the young | |
2466 // generation but could have ended up doing a "full" GC - check the | |
2467 // GC count to see. | |
2468 if (!_full) { | |
342 | 2469 _full = (_invocation_count != Universe::heap()->total_full_collections()); |
0 | 2470 } |
2471 | |
2472 // Full collection probably means the perm generation has been GC'ed | |
2473 // so we clear the breakpoint cache. | |
2474 if (_full) { | |
2475 JvmtiCurrentBreakpoints::gc_epilogue(); | |
2476 } | |
2477 | |
2478 // Notify heap/object tagging support | |
2479 JvmtiTagMap::gc_epilogue(_full); | |
2480 } | |
2481 #endif // JVMTI_KERNEL |