1 /*
2 * Copyright (c) 2003, 2012, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/systemDictionary.hpp"
27 #include "code/nmethod.hpp"
28 #include "code/pcDesc.hpp"
29 #include "code/scopeDesc.hpp"
30 #include "interpreter/interpreter.hpp"
31 #include "jvmtifiles/jvmtiEnv.hpp"
32 #include "memory/resourceArea.hpp"
33 #include "oops/objArrayKlass.hpp"
34 #include "oops/objArrayOop.hpp"
35 #include "prims/jvmtiCodeBlobEvents.hpp"
36 #include "prims/jvmtiEventController.hpp"
37 #include "prims/jvmtiEventController.inline.hpp"
38 #include "prims/jvmtiExport.hpp"
39 #include "prims/jvmtiImpl.hpp"
40 #include "prims/jvmtiManageCapabilities.hpp"
41 #include "prims/jvmtiRawMonitor.hpp"
42 #include "prims/jvmtiTagMap.hpp"
43 #include "prims/jvmtiThreadState.inline.hpp"
44 #include "runtime/arguments.hpp"
45 #include "runtime/handles.hpp"
46 #include "runtime/interfaceSupport.hpp"
47 #include "runtime/objectMonitor.hpp"
48 #include "runtime/objectMonitor.inline.hpp"
49 #include "runtime/thread.hpp"
50 #include "runtime/vframe.hpp"
51 #include "services/attachListener.hpp"
52 #include "services/serviceUtil.hpp"
53 #ifndef SERIALGC
54 #include "gc_implementation/parallelScavenge/psMarkSweep.hpp"
55 #endif
56
57 #ifdef JVMTI_TRACE
58 #define EVT_TRACE(evt,out) if ((JvmtiTrace::event_trace_flags(evt) & JvmtiTrace::SHOW_EVENT_SENT) != 0) { SafeResourceMark rm; tty->print_cr out; }
59 #define EVT_TRIG_TRACE(evt,out) if ((JvmtiTrace::event_trace_flags(evt) & JvmtiTrace::SHOW_EVENT_TRIGGER) != 0) { SafeResourceMark rm; tty->print_cr out; }
60 #else
61 #define EVT_TRIG_TRACE(evt,out)
62 #define EVT_TRACE(evt,out)
63 #endif
64
65 ///////////////////////////////////////////////////////////////
66 //
67 // JvmtiEventTransition
68 //
69 // TO DO --
70 // more handle purging
71
72 // Use this for JavaThreads and state is _thread_in_vm.
73 class JvmtiJavaThreadEventTransition : StackObj {
74 private:
75 ResourceMark _rm;
76 ThreadToNativeFromVM _transition;
77 HandleMark _hm;
78
79 public:
80 JvmtiJavaThreadEventTransition(JavaThread *thread) :
81 _rm(),
82 _transition(thread),
83 _hm(thread) {};
84 };
85
86 // For JavaThreads which are not in _thread_in_vm state
87 // and other system threads use this.
88 class JvmtiThreadEventTransition : StackObj {
89 private:
90 ResourceMark _rm;
91 HandleMark _hm;
92 JavaThreadState _saved_state;
93 JavaThread *_jthread;
94
95 public:
96 JvmtiThreadEventTransition(Thread *thread) : _rm(), _hm() {
97 if (thread->is_Java_thread()) {
98 _jthread = (JavaThread *)thread;
99 _saved_state = _jthread->thread_state();
100 if (_saved_state == _thread_in_Java) {
101 ThreadStateTransition::transition_from_java(_jthread, _thread_in_native);
102 } else {
103 ThreadStateTransition::transition(_jthread, _saved_state, _thread_in_native);
104 }
105 } else {
106 _jthread = NULL;
107 }
108 }
109
110 ~JvmtiThreadEventTransition() {
111 if (_jthread != NULL)
112 ThreadStateTransition::transition_from_native(_jthread, _saved_state);
113 }
114 };
115
116
117 ///////////////////////////////////////////////////////////////
118 //
119 // JvmtiEventMark
120 //
121
122 class JvmtiEventMark : public StackObj {
123 private:
124 JavaThread *_thread;
125 JNIEnv* _jni_env;
126 bool _exception_detected;
127 bool _exception_caught;
128 #if 0
129 JNIHandleBlock* _hblock;
130 #endif
131
132 public:
133 JvmtiEventMark(JavaThread *thread) : _thread(thread),
134 _jni_env(thread->jni_environment()) {
135 #if 0
136 _hblock = thread->active_handles();
137 _hblock->clear_thoroughly(); // so we can be safe
138 #else
139 // we want to use the code above - but that needs the JNIHandle changes - later...
140 // for now, steal JNI push local frame code
141 JvmtiThreadState *state = thread->jvmti_thread_state();
142 // we are before an event.
143 // Save current jvmti thread exception state.
144 if (state != NULL) {
145 _exception_detected = state->is_exception_detected();
146 _exception_caught = state->is_exception_caught();
147 } else {
148 _exception_detected = false;
149 _exception_caught = false;
150 }
151
152 JNIHandleBlock* old_handles = thread->active_handles();
153 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread);
154 assert(new_handles != NULL, "should not be NULL");
155 new_handles->set_pop_frame_link(old_handles);
156 thread->set_active_handles(new_handles);
157 #endif
158 assert(thread == JavaThread::current(), "thread must be current!");
159 thread->frame_anchor()->make_walkable(thread);
160 };
161
162 ~JvmtiEventMark() {
163 #if 0
164 _hblock->clear(); // for consistency with future correct behavior
165 #else
166 // we want to use the code above - but that needs the JNIHandle changes - later...
167 // for now, steal JNI pop local frame code
168 JNIHandleBlock* old_handles = _thread->active_handles();
169 JNIHandleBlock* new_handles = old_handles->pop_frame_link();
170 assert(new_handles != NULL, "should not be NULL");
171 _thread->set_active_handles(new_handles);
172 // Note that we set the pop_frame_link to NULL explicitly, otherwise
173 // the release_block call will release the blocks.
174 old_handles->set_pop_frame_link(NULL);
175 JNIHandleBlock::release_block(old_handles, _thread); // may block
176 #endif
177
178 JvmtiThreadState* state = _thread->jvmti_thread_state();
179 // we are continuing after an event.
180 if (state != NULL) {
181 // Restore the jvmti thread exception state.
182 if (_exception_detected) {
183 state->set_exception_detected();
184 }
185 if (_exception_caught) {
186 state->set_exception_caught();
187 }
188 }
189 }
190
191 #if 0
192 jobject to_jobject(oop obj) { return obj == NULL? NULL : _hblock->allocate_handle_fast(obj); }
193 #else
194 // we want to use the code above - but that needs the JNIHandle changes - later...
195 // for now, use regular make_local
196 jobject to_jobject(oop obj) { return JNIHandles::make_local(_thread,obj); }
197 #endif
198
199 jclass to_jclass(Klass* klass) { return (klass == NULL ? NULL : (jclass)to_jobject(klass->java_mirror())); }
200
201 jmethodID to_jmethodID(methodHandle method) { return method->jmethod_id(); }
202
203 JNIEnv* jni_env() { return _jni_env; }
204 };
205
206 class JvmtiThreadEventMark : public JvmtiEventMark {
207 private:
208 jthread _jt;
209
210 public:
211 JvmtiThreadEventMark(JavaThread *thread) :
212 JvmtiEventMark(thread) {
213 _jt = (jthread)(to_jobject(thread->threadObj()));
214 };
215 jthread jni_thread() { return _jt; }
216 };
217
218 class JvmtiClassEventMark : public JvmtiThreadEventMark {
219 private:
220 jclass _jc;
221
222 public:
223 JvmtiClassEventMark(JavaThread *thread, Klass* klass) :
224 JvmtiThreadEventMark(thread) {
225 _jc = to_jclass(klass);
226 };
227 jclass jni_class() { return _jc; }
228 };
229
230 class JvmtiMethodEventMark : public JvmtiThreadEventMark {
231 private:
232 jmethodID _mid;
233
234 public:
235 JvmtiMethodEventMark(JavaThread *thread, methodHandle method) :
236 JvmtiThreadEventMark(thread),
237 _mid(to_jmethodID(method)) {};
238 jmethodID jni_methodID() { return _mid; }
239 };
240
241 class JvmtiLocationEventMark : public JvmtiMethodEventMark {
242 private:
243 jlocation _loc;
244
245 public:
246 JvmtiLocationEventMark(JavaThread *thread, methodHandle method, address location) :
247 JvmtiMethodEventMark(thread, method),
248 _loc(location - method->code_base()) {};
249 jlocation location() { return _loc; }
250 };
251
252 class JvmtiExceptionEventMark : public JvmtiLocationEventMark {
253 private:
254 jobject _exc;
255
256 public:
257 JvmtiExceptionEventMark(JavaThread *thread, methodHandle method, address location, Handle exception) :
258 JvmtiLocationEventMark(thread, method, location),
259 _exc(to_jobject(exception())) {};
260 jobject exception() { return _exc; }
261 };
262
263 class JvmtiClassFileLoadEventMark : public JvmtiThreadEventMark {
264 private:
265 const char *_class_name;
266 jobject _jloader;
267 jobject _protection_domain;
268 jclass _class_being_redefined;
269
270 public:
271 JvmtiClassFileLoadEventMark(JavaThread *thread, Symbol* name,
272 Handle class_loader, Handle prot_domain, KlassHandle *class_being_redefined) : JvmtiThreadEventMark(thread) {
273 _class_name = name != NULL? name->as_utf8() : NULL;
274 _jloader = (jobject)to_jobject(class_loader());
275 _protection_domain = (jobject)to_jobject(prot_domain());
276 if (class_being_redefined == NULL) {
277 _class_being_redefined = NULL;
278 } else {
279 _class_being_redefined = (jclass)to_jclass((*class_being_redefined)());
280 }
281 };
282 const char *class_name() {
283 return _class_name;
284 }
285 jobject jloader() {
286 return _jloader;
287 }
288 jobject protection_domain() {
289 return _protection_domain;
290 }
291 jclass class_being_redefined() {
292 return _class_being_redefined;
293 }
294 };
295
296 //////////////////////////////////////////////////////////////////////////////
297
298 int JvmtiExport::_field_access_count = 0;
299 int JvmtiExport::_field_modification_count = 0;
300
301 bool JvmtiExport::_can_access_local_variables = false;
302 bool JvmtiExport::_can_hotswap_or_post_breakpoint = false;
303 bool JvmtiExport::_can_modify_any_class = false;
304 bool JvmtiExport::_can_walk_any_space = false;
305
306 bool JvmtiExport::_has_redefined_a_class = false;
307 bool JvmtiExport::_all_dependencies_are_recorded = false;
308
309 //
310 // field access management
311 //
312
313 // interpreter generator needs the address of the counter
314 address JvmtiExport::get_field_access_count_addr() {
315 // We don't grab a lock because we don't want to
316 // serialize field access between all threads. This means that a
317 // thread on another processor can see the wrong count value and
318 // may either miss making a needed call into post_field_access()
319 // or will make an unneeded call into post_field_access(). We pay
320 // this price to avoid slowing down the VM when we aren't watching
321 // field accesses.
322 // Other access/mutation safe by virtue of being in VM state.
323 return (address)(&_field_access_count);
324 }
325
326 //
327 // field modification management
328 //
329
330 // interpreter generator needs the address of the counter
331 address JvmtiExport::get_field_modification_count_addr() {
332 // We don't grab a lock because we don't
333 // want to serialize field modification between all threads. This
334 // means that a thread on another processor can see the wrong
335 // count value and may either miss making a needed call into
336 // post_field_modification() or will make an unneeded call into
337 // post_field_modification(). We pay this price to avoid slowing
338 // down the VM when we aren't watching field modifications.
339 // Other access/mutation safe by virtue of being in VM state.
340 return (address)(&_field_modification_count);
341 }
342
343
344 ///////////////////////////////////////////////////////////////
345 // Functions needed by java.lang.instrument for starting up javaagent.
346 ///////////////////////////////////////////////////////////////
347
348 jint
349 JvmtiExport::get_jvmti_interface(JavaVM *jvm, void **penv, jint version) {
350 // The JVMTI_VERSION_INTERFACE_JVMTI part of the version number
351 // has already been validated in JNI GetEnv().
352 int major, minor, micro;
353
354 // micro version doesn't matter here (yet?)
355 decode_version_values(version, &major, &minor, µ);
356 switch (major) {
357 case 1:
358 switch (minor) {
359 case 0: // version 1.0.<micro> is recognized
360 case 1: // version 1.1.<micro> is recognized
361 case 2: // version 1.2.<micro> is recognized
362 break;
363
364 default:
365 return JNI_EVERSION; // unsupported minor version number
366 }
367 break;
368 default:
369 return JNI_EVERSION; // unsupported major version number
370 }
371
372 if (JvmtiEnv::get_phase() == JVMTI_PHASE_LIVE) {
373 JavaThread* current_thread = (JavaThread*) ThreadLocalStorage::thread();
374 // transition code: native to VM
375 ThreadInVMfromNative __tiv(current_thread);
376 VM_ENTRY_BASE(jvmtiEnv*, JvmtiExport::get_jvmti_interface, current_thread)
377 debug_only(VMNativeEntryWrapper __vew;)
378
379 JvmtiEnv *jvmti_env = JvmtiEnv::create_a_jvmti(version);
380 *penv = jvmti_env->jvmti_external(); // actual type is jvmtiEnv* -- not to be confused with JvmtiEnv*
381 return JNI_OK;
382
383 } else if (JvmtiEnv::get_phase() == JVMTI_PHASE_ONLOAD) {
384 // not live, no thread to transition
385 JvmtiEnv *jvmti_env = JvmtiEnv::create_a_jvmti(version);
386 *penv = jvmti_env->jvmti_external(); // actual type is jvmtiEnv* -- not to be confused with JvmtiEnv*
387 return JNI_OK;
388
389 } else {
390 // Called at the wrong time
391 *penv = NULL;
392 return JNI_EDETACHED;
393 }
394 }
395
396
397 void
398 JvmtiExport::decode_version_values(jint version, int * major, int * minor,
399 int * micro) {
400 *major = (version & JVMTI_VERSION_MASK_MAJOR) >> JVMTI_VERSION_SHIFT_MAJOR;
401 *minor = (version & JVMTI_VERSION_MASK_MINOR) >> JVMTI_VERSION_SHIFT_MINOR;
402 *micro = (version & JVMTI_VERSION_MASK_MICRO) >> JVMTI_VERSION_SHIFT_MICRO;
403 }
404
405 void JvmtiExport::enter_primordial_phase() {
406 JvmtiEnvBase::set_phase(JVMTI_PHASE_PRIMORDIAL);
407 }
408
409 void JvmtiExport::enter_start_phase() {
410 JvmtiManageCapabilities::recompute_always_capabilities();
411 JvmtiEnvBase::set_phase(JVMTI_PHASE_START);
412 }
413
414 void JvmtiExport::enter_onload_phase() {
415 JvmtiEnvBase::set_phase(JVMTI_PHASE_ONLOAD);
416 }
417
418 void JvmtiExport::enter_live_phase() {
419 JvmtiEnvBase::set_phase(JVMTI_PHASE_LIVE);
420 }
421
422 //
423 // JVMTI events that the VM posts to the debugger and also startup agent
424 // and call the agent's premain() for java.lang.instrument.
425 //
426
427 void JvmtiExport::post_vm_start() {
428 EVT_TRIG_TRACE(JVMTI_EVENT_VM_START, ("JVMTI Trg VM start event triggered" ));
429
430 // can now enable some events
431 JvmtiEventController::vm_start();
432
433 JvmtiEnvIterator it;
434 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
435 if (env->is_enabled(JVMTI_EVENT_VM_START)) {
436 EVT_TRACE(JVMTI_EVENT_VM_START, ("JVMTI Evt VM start event sent" ));
437
438 JavaThread *thread = JavaThread::current();
439 JvmtiThreadEventMark jem(thread);
440 JvmtiJavaThreadEventTransition jet(thread);
441 jvmtiEventVMStart callback = env->callbacks()->VMStart;
442 if (callback != NULL) {
443 (*callback)(env->jvmti_external(), jem.jni_env());
444 }
445 }
446 }
447 }
448
449
450 void JvmtiExport::post_vm_initialized() {
451 EVT_TRIG_TRACE(JVMTI_EVENT_VM_INIT, ("JVMTI Trg VM init event triggered" ));
452
453 // can now enable events
454 JvmtiEventController::vm_init();
455
456 JvmtiEnvIterator it;
457 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
458 if (env->is_enabled(JVMTI_EVENT_VM_INIT)) {
459 EVT_TRACE(JVMTI_EVENT_VM_INIT, ("JVMTI Evt VM init event sent" ));
460
461 JavaThread *thread = JavaThread::current();
462 JvmtiThreadEventMark jem(thread);
463 JvmtiJavaThreadEventTransition jet(thread);
464 jvmtiEventVMInit callback = env->callbacks()->VMInit;
465 if (callback != NULL) {
466 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread());
467 }
468 }
469 }
470 }
471
472
473 void JvmtiExport::post_vm_death() {
474 EVT_TRIG_TRACE(JVMTI_EVENT_VM_DEATH, ("JVMTI Trg VM death event triggered" ));
475
476 JvmtiEnvIterator it;
477 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
478 if (env->is_enabled(JVMTI_EVENT_VM_DEATH)) {
479 EVT_TRACE(JVMTI_EVENT_VM_DEATH, ("JVMTI Evt VM death event sent" ));
480
481 JavaThread *thread = JavaThread::current();
482 JvmtiEventMark jem(thread);
483 JvmtiJavaThreadEventTransition jet(thread);
484 jvmtiEventVMDeath callback = env->callbacks()->VMDeath;
485 if (callback != NULL) {
486 (*callback)(env->jvmti_external(), jem.jni_env());
487 }
488 }
489 }
490
491 JvmtiEnvBase::set_phase(JVMTI_PHASE_DEAD);
492 JvmtiEventController::vm_death();
493 }
494
495 char**
496 JvmtiExport::get_all_native_method_prefixes(int* count_ptr) {
497 // Have to grab JVMTI thread state lock to be sure environment doesn't
498 // go away while we iterate them. No locks during VM bring-up.
499 if (Threads::number_of_threads() == 0 || SafepointSynchronize::is_at_safepoint()) {
500 return JvmtiEnvBase::get_all_native_method_prefixes(count_ptr);
501 } else {
502 MutexLocker mu(JvmtiThreadState_lock);
503 return JvmtiEnvBase::get_all_native_method_prefixes(count_ptr);
504 }
505 }
506
507 class JvmtiClassFileLoadHookPoster : public StackObj {
508 private:
509 Symbol* _h_name;
510 Handle _class_loader;
511 Handle _h_protection_domain;
512 unsigned char ** _data_ptr;
513 unsigned char ** _end_ptr;
514 JavaThread * _thread;
515 jint _curr_len;
516 unsigned char * _curr_data;
517 JvmtiEnv * _curr_env;
518 jint * _cached_length_ptr;
519 unsigned char ** _cached_data_ptr;
520 JvmtiThreadState * _state;
521 KlassHandle * _h_class_being_redefined;
522 JvmtiClassLoadKind _load_kind;
523
524 public:
525 inline JvmtiClassFileLoadHookPoster(Symbol* h_name, Handle class_loader,
526 Handle h_protection_domain,
527 unsigned char **data_ptr, unsigned char **end_ptr,
528 unsigned char **cached_data_ptr,
529 jint *cached_length_ptr) {
530 _h_name = h_name;
531 _class_loader = class_loader;
532 _h_protection_domain = h_protection_domain;
533 _data_ptr = data_ptr;
534 _end_ptr = end_ptr;
535 _thread = JavaThread::current();
536 _curr_len = *end_ptr - *data_ptr;
537 _curr_data = *data_ptr;
538 _curr_env = NULL;
539 _cached_length_ptr = cached_length_ptr;
540 _cached_data_ptr = cached_data_ptr;
541
542 _state = _thread->jvmti_thread_state();
543 if (_state != NULL) {
544 _h_class_being_redefined = _state->get_class_being_redefined();
545 _load_kind = _state->get_class_load_kind();
546 // Clear class_being_redefined flag here. The action
547 // from agent handler could generate a new class file load
548 // hook event and if it is not cleared the new event generated
549 // from regular class file load could have this stale redefined
550 // class handle info.
551 _state->clear_class_being_redefined();
552 } else {
553 // redefine and retransform will always set the thread state
554 _h_class_being_redefined = (KlassHandle *) NULL;
555 _load_kind = jvmti_class_load_kind_load;
556 }
557 }
558
559 void post() {
560 // EVT_TRIG_TRACE(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK,
561 // ("JVMTI [%s] class file load hook event triggered",
562 // JvmtiTrace::safe_get_thread_name(_thread)));
563 post_all_envs();
564 copy_modified_data();
565 }
566
567 private:
568 void post_all_envs() {
569 if (_load_kind != jvmti_class_load_kind_retransform) {
570 // for class load and redefine,
571 // call the non-retransformable agents
572 JvmtiEnvIterator it;
573 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
574 if (!env->is_retransformable() && env->is_enabled(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK)) {
575 // non-retransformable agents cannot retransform back,
576 // so no need to cache the original class file bytes
577 post_to_env(env, false);
578 }
579 }
580 }
581 JvmtiEnvIterator it;
582 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
583 // retransformable agents get all events
584 if (env->is_retransformable() && env->is_enabled(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK)) {
585 // retransformable agents need to cache the original class file
586 // bytes if changes are made via the ClassFileLoadHook
587 post_to_env(env, true);
588 }
589 }
590 }
591
592 void post_to_env(JvmtiEnv* env, bool caching_needed) {
593 unsigned char *new_data = NULL;
594 jint new_len = 0;
595 // EVT_TRACE(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK,
596 // ("JVMTI [%s] class file load hook event sent %s data_ptr = %d, data_len = %d",
597 // JvmtiTrace::safe_get_thread_name(_thread),
598 // _h_name == NULL ? "NULL" : _h_name->as_utf8(),
599 // _curr_data, _curr_len ));
600 JvmtiClassFileLoadEventMark jem(_thread, _h_name, _class_loader,
601 _h_protection_domain,
602 _h_class_being_redefined);
603 JvmtiJavaThreadEventTransition jet(_thread);
604 JNIEnv* jni_env = (JvmtiEnv::get_phase() == JVMTI_PHASE_PRIMORDIAL)?
605 NULL : jem.jni_env();
606 jvmtiEventClassFileLoadHook callback = env->callbacks()->ClassFileLoadHook;
607 if (callback != NULL) {
608 (*callback)(env->jvmti_external(), jni_env,
609 jem.class_being_redefined(),
610 jem.jloader(), jem.class_name(),
611 jem.protection_domain(),
612 _curr_len, _curr_data,
613 &new_len, &new_data);
614 }
615 if (new_data != NULL) {
616 // this agent has modified class data.
617 if (caching_needed && *_cached_data_ptr == NULL) {
618 // data has been changed by the new retransformable agent
619 // and it hasn't already been cached, cache it
620 *_cached_data_ptr = (unsigned char *)os::malloc(_curr_len, mtInternal);
621 memcpy(*_cached_data_ptr, _curr_data, _curr_len);
622 *_cached_length_ptr = _curr_len;
623 }
624
625 if (_curr_data != *_data_ptr) {
626 // curr_data is previous agent modified class data.
627 // And this has been changed by the new agent so
628 // we can delete it now.
629 _curr_env->Deallocate(_curr_data);
630 }
631
632 // Class file data has changed by the current agent.
633 _curr_data = new_data;
634 _curr_len = new_len;
635 // Save the current agent env we need this to deallocate the
636 // memory allocated by this agent.
637 _curr_env = env;
638 }
639 }
640
641 void copy_modified_data() {
642 // if one of the agent has modified class file data.
643 // Copy modified class data to new resources array.
644 if (_curr_data != *_data_ptr) {
645 *_data_ptr = NEW_RESOURCE_ARRAY(u1, _curr_len);
646 memcpy(*_data_ptr, _curr_data, _curr_len);
647 *_end_ptr = *_data_ptr + _curr_len;
648 _curr_env->Deallocate(_curr_data);
649 }
650 }
651 };
652
653 bool JvmtiExport::_should_post_class_file_load_hook = false;
654
655 // this entry is for class file load hook on class load, redefine and retransform
656 void JvmtiExport::post_class_file_load_hook(Symbol* h_name,
657 Handle class_loader,
658 Handle h_protection_domain,
659 unsigned char **data_ptr,
660 unsigned char **end_ptr,
661 unsigned char **cached_data_ptr,
662 jint *cached_length_ptr) {
663 JvmtiClassFileLoadHookPoster poster(h_name, class_loader,
664 h_protection_domain,
665 data_ptr, end_ptr,
666 cached_data_ptr,
667 cached_length_ptr);
668 poster.post();
669 }
670
671 void JvmtiExport::report_unsupported(bool on) {
672 // If any JVMTI service is turned on, we need to exit before native code
673 // tries to access nonexistant services.
674 if (on) {
675 vm_exit_during_initialization("Java Kernel does not support JVMTI.");
676 }
677 }
678
679
680 #ifndef JVMTI_KERNEL
681 static inline Klass* oop_to_klass(oop obj) {
682 Klass* k = obj->klass();
683
684 // if the object is a java.lang.Class then return the java mirror
685 if (k == SystemDictionary::Class_klass()) {
686 if (!java_lang_Class::is_primitive(obj)) {
687 k = java_lang_Class::as_Klass(obj);
688 assert(k != NULL, "class for non-primitive mirror must exist");
689 }
690 }
691 return k;
692 }
693
694 class JvmtiVMObjectAllocEventMark : public JvmtiClassEventMark {
695 private:
696 jobject _jobj;
697 jlong _size;
698 public:
699 JvmtiVMObjectAllocEventMark(JavaThread *thread, oop obj) : JvmtiClassEventMark(thread, oop_to_klass(obj)) {
700 _jobj = (jobject)to_jobject(obj);
701 _size = obj->size() * wordSize;
702 };
703 jobject jni_jobject() { return _jobj; }
704 jlong size() { return _size; }
705 };
706
707 class JvmtiCompiledMethodLoadEventMark : public JvmtiMethodEventMark {
708 private:
709 jint _code_size;
710 const void *_code_data;
711 jint _map_length;
712 jvmtiAddrLocationMap *_map;
713 const void *_compile_info;
714 public:
715 JvmtiCompiledMethodLoadEventMark(JavaThread *thread, nmethod *nm, void* compile_info_ptr = NULL)
716 : JvmtiMethodEventMark(thread,methodHandle(thread, nm->method())) {
717 _code_data = nm->insts_begin();
718 _code_size = nm->insts_size();
719 _compile_info = compile_info_ptr; // Set void pointer of compiledMethodLoad Event. Default value is NULL.
720 JvmtiCodeBlobEvents::build_jvmti_addr_location_map(nm, &_map, &_map_length);
721 }
722 ~JvmtiCompiledMethodLoadEventMark() {
723 FREE_C_HEAP_ARRAY(jvmtiAddrLocationMap, _map, mtInternal);
724 }
725
726 jint code_size() { return _code_size; }
727 const void *code_data() { return _code_data; }
728 jint map_length() { return _map_length; }
729 const jvmtiAddrLocationMap* map() { return _map; }
730 const void *compile_info() { return _compile_info; }
731 };
732
733
734
735 class JvmtiMonitorEventMark : public JvmtiThreadEventMark {
736 private:
737 jobject _jobj;
738 public:
739 JvmtiMonitorEventMark(JavaThread *thread, oop object)
740 : JvmtiThreadEventMark(thread){
741 _jobj = to_jobject(object);
742 }
743 jobject jni_object() { return _jobj; }
744 };
745
746 ///////////////////////////////////////////////////////////////
747 //
748 // pending CompiledMethodUnload support
749 //
750
751 void JvmtiExport::post_compiled_method_unload(
752 jmethodID method, const void *code_begin) {
753 JavaThread* thread = JavaThread::current();
754 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_UNLOAD,
755 ("JVMTI [%s] method compile unload event triggered",
756 JvmtiTrace::safe_get_thread_name(thread)));
757
758 // post the event for each environment that has this event enabled.
759 JvmtiEnvIterator it;
760 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
761 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_UNLOAD)) {
762
763 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_UNLOAD,
764 ("JVMTI [%s] class compile method unload event sent jmethodID " PTR_FORMAT,
765 JvmtiTrace::safe_get_thread_name(thread), method));
766
767 ResourceMark rm(thread);
768
769 JvmtiEventMark jem(thread);
770 JvmtiJavaThreadEventTransition jet(thread);
771 jvmtiEventCompiledMethodUnload callback = env->callbacks()->CompiledMethodUnload;
772 if (callback != NULL) {
773 (*callback)(env->jvmti_external(), method, code_begin);
774 }
775 }
776 }
777 }
778
779 ///////////////////////////////////////////////////////////////
780 //
781 // JvmtiExport
782 //
783
784 void JvmtiExport::post_raw_breakpoint(JavaThread *thread, Method* method, address location) {
785 HandleMark hm(thread);
786 methodHandle mh(thread, method);
787
788 JvmtiThreadState *state = thread->jvmti_thread_state();
789 if (state == NULL) {
790 return;
791 }
792 EVT_TRIG_TRACE(JVMTI_EVENT_BREAKPOINT, ("JVMTI [%s] Trg Breakpoint triggered",
793 JvmtiTrace::safe_get_thread_name(thread)));
794 JvmtiEnvThreadStateIterator it(state);
795 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
796 ets->compare_and_set_current_location(mh(), location, JVMTI_EVENT_BREAKPOINT);
797 if (!ets->breakpoint_posted() && ets->is_enabled(JVMTI_EVENT_BREAKPOINT)) {
798 ThreadState old_os_state = thread->osthread()->get_state();
799 thread->osthread()->set_state(BREAKPOINTED);
800 EVT_TRACE(JVMTI_EVENT_BREAKPOINT, ("JVMTI [%s] Evt Breakpoint sent %s.%s @ %d",
801 JvmtiTrace::safe_get_thread_name(thread),
802 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
803 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
804 location - mh()->code_base() ));
805
806 JvmtiEnv *env = ets->get_env();
807 JvmtiLocationEventMark jem(thread, mh, location);
808 JvmtiJavaThreadEventTransition jet(thread);
809 jvmtiEventBreakpoint callback = env->callbacks()->Breakpoint;
810 if (callback != NULL) {
811 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
812 jem.jni_methodID(), jem.location());
813 }
814
815 ets->set_breakpoint_posted();
816 thread->osthread()->set_state(old_os_state);
817 }
818 }
819 }
820
821 //////////////////////////////////////////////////////////////////////////////
822
823 bool JvmtiExport::_can_get_source_debug_extension = false;
824 bool JvmtiExport::_can_maintain_original_method_order = false;
825 bool JvmtiExport::_can_post_interpreter_events = false;
826 bool JvmtiExport::_can_post_on_exceptions = false;
827 bool JvmtiExport::_can_post_breakpoint = false;
828 bool JvmtiExport::_can_post_field_access = false;
829 bool JvmtiExport::_can_post_field_modification = false;
830 bool JvmtiExport::_can_post_method_entry = false;
831 bool JvmtiExport::_can_post_method_exit = false;
832 bool JvmtiExport::_can_pop_frame = false;
833 bool JvmtiExport::_can_force_early_return = false;
834
835 bool JvmtiExport::_should_post_single_step = false;
836 bool JvmtiExport::_should_post_field_access = false;
837 bool JvmtiExport::_should_post_field_modification = false;
838 bool JvmtiExport::_should_post_class_load = false;
839 bool JvmtiExport::_should_post_class_prepare = false;
840 bool JvmtiExport::_should_post_class_unload = false;
841 bool JvmtiExport::_should_post_thread_life = false;
842 bool JvmtiExport::_should_clean_up_heap_objects = false;
843 bool JvmtiExport::_should_post_native_method_bind = false;
844 bool JvmtiExport::_should_post_dynamic_code_generated = false;
845 bool JvmtiExport::_should_post_data_dump = false;
846 bool JvmtiExport::_should_post_compiled_method_load = false;
847 bool JvmtiExport::_should_post_compiled_method_unload = false;
848 bool JvmtiExport::_should_post_monitor_contended_enter = false;
849 bool JvmtiExport::_should_post_monitor_contended_entered = false;
850 bool JvmtiExport::_should_post_monitor_wait = false;
851 bool JvmtiExport::_should_post_monitor_waited = false;
852 bool JvmtiExport::_should_post_garbage_collection_start = false;
853 bool JvmtiExport::_should_post_garbage_collection_finish = false;
854 bool JvmtiExport::_should_post_object_free = false;
855 bool JvmtiExport::_should_post_resource_exhausted = false;
856 bool JvmtiExport::_should_post_vm_object_alloc = false;
857 bool JvmtiExport::_should_post_on_exceptions = false;
858
859 ////////////////////////////////////////////////////////////////////////////////////////////////
860
861
862 //
863 // JVMTI single step management
864 //
865 void JvmtiExport::at_single_stepping_point(JavaThread *thread, Method* method, address location) {
866 assert(JvmtiExport::should_post_single_step(), "must be single stepping");
867
868 HandleMark hm(thread);
869 methodHandle mh(thread, method);
870
871 // update information about current location and post a step event
872 JvmtiThreadState *state = thread->jvmti_thread_state();
873 if (state == NULL) {
874 return;
875 }
876 EVT_TRIG_TRACE(JVMTI_EVENT_SINGLE_STEP, ("JVMTI [%s] Trg Single Step triggered",
877 JvmtiTrace::safe_get_thread_name(thread)));
878 if (!state->hide_single_stepping()) {
879 if (state->is_pending_step_for_popframe()) {
880 state->process_pending_step_for_popframe();
881 }
882 if (state->is_pending_step_for_earlyret()) {
883 state->process_pending_step_for_earlyret();
884 }
885 JvmtiExport::post_single_step(thread, mh(), location);
886 }
887 }
888
889
890 void JvmtiExport::expose_single_stepping(JavaThread *thread) {
891 JvmtiThreadState *state = thread->jvmti_thread_state();
892 if (state != NULL) {
893 state->clear_hide_single_stepping();
894 }
895 }
896
897
898 bool JvmtiExport::hide_single_stepping(JavaThread *thread) {
899 JvmtiThreadState *state = thread->jvmti_thread_state();
900 if (state != NULL && state->is_enabled(JVMTI_EVENT_SINGLE_STEP)) {
901 state->set_hide_single_stepping();
902 return true;
903 } else {
904 return false;
905 }
906 }
907
908 void JvmtiExport::post_class_load(JavaThread *thread, Klass* klass) {
909 HandleMark hm(thread);
910 KlassHandle kh(thread, klass);
911
912 EVT_TRIG_TRACE(JVMTI_EVENT_CLASS_LOAD, ("JVMTI [%s] Trg Class Load triggered",
913 JvmtiTrace::safe_get_thread_name(thread)));
914 JvmtiThreadState* state = thread->jvmti_thread_state();
915 if (state == NULL) {
916 return;
917 }
918 JvmtiEnvThreadStateIterator it(state);
919 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
920 if (ets->is_enabled(JVMTI_EVENT_CLASS_LOAD)) {
921 EVT_TRACE(JVMTI_EVENT_CLASS_LOAD, ("JVMTI [%s] Evt Class Load sent %s",
922 JvmtiTrace::safe_get_thread_name(thread),
923 kh()==NULL? "NULL" : kh()->external_name() ));
924
925 JvmtiEnv *env = ets->get_env();
926 JvmtiClassEventMark jem(thread, kh());
927 JvmtiJavaThreadEventTransition jet(thread);
928 jvmtiEventClassLoad callback = env->callbacks()->ClassLoad;
929 if (callback != NULL) {
930 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_class());
931 }
932 }
933 }
934 }
935
936
937 void JvmtiExport::post_class_prepare(JavaThread *thread, Klass* klass) {
938 HandleMark hm(thread);
939 KlassHandle kh(thread, klass);
940
941 EVT_TRIG_TRACE(JVMTI_EVENT_CLASS_PREPARE, ("JVMTI [%s] Trg Class Prepare triggered",
942 JvmtiTrace::safe_get_thread_name(thread)));
943 JvmtiThreadState* state = thread->jvmti_thread_state();
944 if (state == NULL) {
945 return;
946 }
947 JvmtiEnvThreadStateIterator it(state);
948 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
949 if (ets->is_enabled(JVMTI_EVENT_CLASS_PREPARE)) {
950 EVT_TRACE(JVMTI_EVENT_CLASS_PREPARE, ("JVMTI [%s] Evt Class Prepare sent %s",
951 JvmtiTrace::safe_get_thread_name(thread),
952 kh()==NULL? "NULL" : kh()->external_name() ));
953
954 JvmtiEnv *env = ets->get_env();
955 JvmtiClassEventMark jem(thread, kh());
956 JvmtiJavaThreadEventTransition jet(thread);
957 jvmtiEventClassPrepare callback = env->callbacks()->ClassPrepare;
958 if (callback != NULL) {
959 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_class());
960 }
961 }
962 }
963 }
964
965 void JvmtiExport::post_class_unload(Klass* klass) {
966 Thread *thread = Thread::current();
967 HandleMark hm(thread);
968 KlassHandle kh(thread, klass);
969
970 EVT_TRIG_TRACE(EXT_EVENT_CLASS_UNLOAD, ("JVMTI [?] Trg Class Unload triggered" ));
971 if (JvmtiEventController::is_enabled((jvmtiEvent)EXT_EVENT_CLASS_UNLOAD)) {
972 assert(thread->is_VM_thread(), "wrong thread");
973
974 // get JavaThread for whom we are proxy
975 JavaThread *real_thread =
976 (JavaThread *)((VMThread *)thread)->vm_operation()->calling_thread();
977
978 JvmtiEnvIterator it;
979 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
980 if (env->is_enabled((jvmtiEvent)EXT_EVENT_CLASS_UNLOAD)) {
981 EVT_TRACE(EXT_EVENT_CLASS_UNLOAD, ("JVMTI [?] Evt Class Unload sent %s",
982 kh()==NULL? "NULL" : kh()->external_name() ));
983
984 // do everything manually, since this is a proxy - needs special care
985 JNIEnv* jni_env = real_thread->jni_environment();
986 jthread jt = (jthread)JNIHandles::make_local(real_thread, real_thread->threadObj());
987 jclass jk = (jclass)JNIHandles::make_local(real_thread, kh()->java_mirror());
988
989 // Before we call the JVMTI agent, we have to set the state in the
990 // thread for which we are proxying.
991 JavaThreadState prev_state = real_thread->thread_state();
992 assert(prev_state == _thread_blocked, "JavaThread should be at safepoint");
993 real_thread->set_thread_state(_thread_in_native);
994
995 jvmtiExtensionEvent callback = env->ext_callbacks()->ClassUnload;
996 if (callback != NULL) {
997 (*callback)(env->jvmti_external(), jni_env, jt, jk);
998 }
999
1000 assert(real_thread->thread_state() == _thread_in_native,
1001 "JavaThread should be in native");
1002 real_thread->set_thread_state(prev_state);
1003
1004 JNIHandles::destroy_local(jk);
1005 JNIHandles::destroy_local(jt);
1006 }
1007 }
1008 }
1009 }
1010
1011
1012 void JvmtiExport::post_thread_start(JavaThread *thread) {
1013 assert(thread->thread_state() == _thread_in_vm, "must be in vm state");
1014
1015 EVT_TRIG_TRACE(JVMTI_EVENT_THREAD_START, ("JVMTI [%s] Trg Thread Start event triggered",
1016 JvmtiTrace::safe_get_thread_name(thread)));
1017
1018 // do JVMTI thread initialization (if needed)
1019 JvmtiEventController::thread_started(thread);
1020
1021 // Do not post thread start event for hidden java thread.
1022 if (JvmtiEventController::is_enabled(JVMTI_EVENT_THREAD_START) &&
1023 !thread->is_hidden_from_external_view()) {
1024 JvmtiEnvIterator it;
1025 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1026 if (env->is_enabled(JVMTI_EVENT_THREAD_START)) {
1027 EVT_TRACE(JVMTI_EVENT_THREAD_START, ("JVMTI [%s] Evt Thread Start event sent",
1028 JvmtiTrace::safe_get_thread_name(thread) ));
1029
1030 JvmtiThreadEventMark jem(thread);
1031 JvmtiJavaThreadEventTransition jet(thread);
1032 jvmtiEventThreadStart callback = env->callbacks()->ThreadStart;
1033 if (callback != NULL) {
1034 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread());
1035 }
1036 }
1037 }
1038 }
1039 }
1040
1041
1042 void JvmtiExport::post_thread_end(JavaThread *thread) {
1043 EVT_TRIG_TRACE(JVMTI_EVENT_THREAD_END, ("JVMTI [%s] Trg Thread End event triggered",
1044 JvmtiTrace::safe_get_thread_name(thread)));
1045
1046 JvmtiThreadState *state = thread->jvmti_thread_state();
1047 if (state == NULL) {
1048 return;
1049 }
1050
1051 // Do not post thread end event for hidden java thread.
1052 if (state->is_enabled(JVMTI_EVENT_THREAD_END) &&
1053 !thread->is_hidden_from_external_view()) {
1054
1055 JvmtiEnvThreadStateIterator it(state);
1056 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1057 if (ets->is_enabled(JVMTI_EVENT_THREAD_END)) {
1058 EVT_TRACE(JVMTI_EVENT_THREAD_END, ("JVMTI [%s] Evt Thread End event sent",
1059 JvmtiTrace::safe_get_thread_name(thread) ));
1060
1061 JvmtiEnv *env = ets->get_env();
1062 JvmtiThreadEventMark jem(thread);
1063 JvmtiJavaThreadEventTransition jet(thread);
1064 jvmtiEventThreadEnd callback = env->callbacks()->ThreadEnd;
1065 if (callback != NULL) {
1066 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread());
1067 }
1068 }
1069 }
1070 }
1071 }
1072
1073 void JvmtiExport::post_object_free(JvmtiEnv* env, jlong tag) {
1074 assert(SafepointSynchronize::is_at_safepoint(), "must be executed at safepoint");
1075 assert(env->is_enabled(JVMTI_EVENT_OBJECT_FREE), "checking");
1076
1077 EVT_TRIG_TRACE(JVMTI_EVENT_OBJECT_FREE, ("JVMTI [?] Trg Object Free triggered" ));
1078 EVT_TRACE(JVMTI_EVENT_OBJECT_FREE, ("JVMTI [?] Evt Object Free sent"));
1079
1080 jvmtiEventObjectFree callback = env->callbacks()->ObjectFree;
1081 if (callback != NULL) {
1082 (*callback)(env->jvmti_external(), tag);
1083 }
1084 }
1085
1086 void JvmtiExport::post_resource_exhausted(jint resource_exhausted_flags, const char* description) {
1087 EVT_TRIG_TRACE(JVMTI_EVENT_RESOURCE_EXHAUSTED, ("JVMTI Trg resource exhausted event triggered" ));
1088
1089 JvmtiEnvIterator it;
1090 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1091 if (env->is_enabled(JVMTI_EVENT_RESOURCE_EXHAUSTED)) {
1092 EVT_TRACE(JVMTI_EVENT_RESOURCE_EXHAUSTED, ("JVMTI Evt resource exhausted event sent" ));
1093
1094 JavaThread *thread = JavaThread::current();
1095 JvmtiThreadEventMark jem(thread);
1096 JvmtiJavaThreadEventTransition jet(thread);
1097 jvmtiEventResourceExhausted callback = env->callbacks()->ResourceExhausted;
1098 if (callback != NULL) {
1099 (*callback)(env->jvmti_external(), jem.jni_env(),
1100 resource_exhausted_flags, NULL, description);
1101 }
1102 }
1103 }
1104 }
1105
1106 void JvmtiExport::post_method_entry(JavaThread *thread, Method* method, frame current_frame) {
1107 HandleMark hm(thread);
1108 methodHandle mh(thread, method);
1109
1110 EVT_TRIG_TRACE(JVMTI_EVENT_METHOD_ENTRY, ("JVMTI [%s] Trg Method Entry triggered %s.%s",
1111 JvmtiTrace::safe_get_thread_name(thread),
1112 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1113 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1114
1115 JvmtiThreadState* state = thread->jvmti_thread_state();
1116 if (state == NULL || !state->is_interp_only_mode()) {
1117 // for any thread that actually wants method entry, interp_only_mode is set
1118 return;
1119 }
1120
1121 state->incr_cur_stack_depth();
1122
1123 if (state->is_enabled(JVMTI_EVENT_METHOD_ENTRY)) {
1124 JvmtiEnvThreadStateIterator it(state);
1125 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1126 if (ets->is_enabled(JVMTI_EVENT_METHOD_ENTRY)) {
1127 EVT_TRACE(JVMTI_EVENT_METHOD_ENTRY, ("JVMTI [%s] Evt Method Entry sent %s.%s",
1128 JvmtiTrace::safe_get_thread_name(thread),
1129 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1130 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1131
1132 JvmtiEnv *env = ets->get_env();
1133 JvmtiMethodEventMark jem(thread, mh);
1134 JvmtiJavaThreadEventTransition jet(thread);
1135 jvmtiEventMethodEntry callback = env->callbacks()->MethodEntry;
1136 if (callback != NULL) {
1137 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_methodID());
1138 }
1139 }
1140 }
1141 }
1142 }
1143
1144 void JvmtiExport::post_method_exit(JavaThread *thread, Method* method, frame current_frame) {
1145 HandleMark hm(thread);
1146 methodHandle mh(thread, method);
1147
1148 EVT_TRIG_TRACE(JVMTI_EVENT_METHOD_EXIT, ("JVMTI [%s] Trg Method Exit triggered %s.%s",
1149 JvmtiTrace::safe_get_thread_name(thread),
1150 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1151 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1152
1153 JvmtiThreadState *state = thread->jvmti_thread_state();
1154 if (state == NULL || !state->is_interp_only_mode()) {
1155 // for any thread that actually wants method exit, interp_only_mode is set
1156 return;
1157 }
1158
1159 // return a flag when a method terminates by throwing an exception
1160 // i.e. if an exception is thrown and it's not caught by the current method
1161 bool exception_exit = state->is_exception_detected() && !state->is_exception_caught();
1162
1163
1164 if (state->is_enabled(JVMTI_EVENT_METHOD_EXIT)) {
1165 Handle result;
1166 jvalue value;
1167 value.j = 0L;
1168
1169 // if the method hasn't been popped because of an exception then we populate
1170 // the return_value parameter for the callback. At this point we only have
1171 // the address of a "raw result" and we just call into the interpreter to
1172 // convert this into a jvalue.
1173 if (!exception_exit) {
1174 oop oop_result;
1175 BasicType type = current_frame.interpreter_frame_result(&oop_result, &value);
1176 if (type == T_OBJECT || type == T_ARRAY) {
1177 result = Handle(thread, oop_result);
1178 }
1179 }
1180
1181 JvmtiEnvThreadStateIterator it(state);
1182 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1183 if (ets->is_enabled(JVMTI_EVENT_METHOD_EXIT)) {
1184 EVT_TRACE(JVMTI_EVENT_METHOD_EXIT, ("JVMTI [%s] Evt Method Exit sent %s.%s",
1185 JvmtiTrace::safe_get_thread_name(thread),
1186 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1187 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1188
1189 JvmtiEnv *env = ets->get_env();
1190 JvmtiMethodEventMark jem(thread, mh);
1191 if (result.not_null()) {
1192 value.l = JNIHandles::make_local(thread, result());
1193 }
1194 JvmtiJavaThreadEventTransition jet(thread);
1195 jvmtiEventMethodExit callback = env->callbacks()->MethodExit;
1196 if (callback != NULL) {
1197 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1198 jem.jni_methodID(), exception_exit, value);
1199 }
1200 }
1201 }
1202 }
1203
1204 if (state->is_enabled(JVMTI_EVENT_FRAME_POP)) {
1205 JvmtiEnvThreadStateIterator it(state);
1206 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1207 int cur_frame_number = state->cur_stack_depth();
1208
1209 if (ets->is_frame_pop(cur_frame_number)) {
1210 // we have a NotifyFramePop entry for this frame.
1211 // now check that this env/thread wants this event
1212 if (ets->is_enabled(JVMTI_EVENT_FRAME_POP)) {
1213 EVT_TRACE(JVMTI_EVENT_FRAME_POP, ("JVMTI [%s] Evt Frame Pop sent %s.%s",
1214 JvmtiTrace::safe_get_thread_name(thread),
1215 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1216 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1217
1218 // we also need to issue a frame pop event for this frame
1219 JvmtiEnv *env = ets->get_env();
1220 JvmtiMethodEventMark jem(thread, mh);
1221 JvmtiJavaThreadEventTransition jet(thread);
1222 jvmtiEventFramePop callback = env->callbacks()->FramePop;
1223 if (callback != NULL) {
1224 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1225 jem.jni_methodID(), exception_exit);
1226 }
1227 }
1228 // remove the frame's entry
1229 ets->clear_frame_pop(cur_frame_number);
1230 }
1231 }
1232 }
1233
1234 state->decr_cur_stack_depth();
1235 }
1236
1237
1238 // Todo: inline this for optimization
1239 void JvmtiExport::post_single_step(JavaThread *thread, Method* method, address location) {
1240 HandleMark hm(thread);
1241 methodHandle mh(thread, method);
1242
1243 JvmtiThreadState *state = thread->jvmti_thread_state();
1244 if (state == NULL) {
1245 return;
1246 }
1247 JvmtiEnvThreadStateIterator it(state);
1248 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1249 ets->compare_and_set_current_location(mh(), location, JVMTI_EVENT_SINGLE_STEP);
1250 if (!ets->single_stepping_posted() && ets->is_enabled(JVMTI_EVENT_SINGLE_STEP)) {
1251 EVT_TRACE(JVMTI_EVENT_SINGLE_STEP, ("JVMTI [%s] Evt Single Step sent %s.%s @ %d",
1252 JvmtiTrace::safe_get_thread_name(thread),
1253 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1254 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1255 location - mh()->code_base() ));
1256
1257 JvmtiEnv *env = ets->get_env();
1258 JvmtiLocationEventMark jem(thread, mh, location);
1259 JvmtiJavaThreadEventTransition jet(thread);
1260 jvmtiEventSingleStep callback = env->callbacks()->SingleStep;
1261 if (callback != NULL) {
1262 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1263 jem.jni_methodID(), jem.location());
1264 }
1265
1266 ets->set_single_stepping_posted();
1267 }
1268 }
1269 }
1270
1271
1272 void JvmtiExport::post_exception_throw(JavaThread *thread, Method* method, address location, oop exception) {
1273 HandleMark hm(thread);
1274 methodHandle mh(thread, method);
1275 Handle exception_handle(thread, exception);
1276
1277 JvmtiThreadState *state = thread->jvmti_thread_state();
1278 if (state == NULL) {
1279 return;
1280 }
1281
1282 EVT_TRIG_TRACE(JVMTI_EVENT_EXCEPTION, ("JVMTI [%s] Trg Exception thrown triggered",
1283 JvmtiTrace::safe_get_thread_name(thread)));
1284 if (!state->is_exception_detected()) {
1285 state->set_exception_detected();
1286 JvmtiEnvThreadStateIterator it(state);
1287 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1288 if (ets->is_enabled(JVMTI_EVENT_EXCEPTION) && (exception != NULL)) {
1289
1290 EVT_TRACE(JVMTI_EVENT_EXCEPTION,
1291 ("JVMTI [%s] Evt Exception thrown sent %s.%s @ %d",
1292 JvmtiTrace::safe_get_thread_name(thread),
1293 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1294 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1295 location - mh()->code_base() ));
1296
1297 JvmtiEnv *env = ets->get_env();
1298 JvmtiExceptionEventMark jem(thread, mh, location, exception_handle);
1299
1300 // It's okay to clear these exceptions here because we duplicate
1301 // this lookup in InterpreterRuntime::exception_handler_for_exception.
1302 EXCEPTION_MARK;
1303
1304 bool should_repeat;
1305 vframeStream st(thread);
1306 assert(!st.at_end(), "cannot be at end");
1307 Method* current_method = NULL;
1308 int current_bci = -1;
1309 do {
1310 current_method = st.method();
1311 current_bci = st.bci();
1312 do {
1313 should_repeat = false;
1314 KlassHandle eh_klass(thread, exception_handle()->klass());
1315 current_bci = current_method->fast_exception_handler_bci_for(
1316 eh_klass, current_bci, THREAD);
1317 if (HAS_PENDING_EXCEPTION) {
1318 exception_handle = Handle(thread, PENDING_EXCEPTION);
1319 CLEAR_PENDING_EXCEPTION;
1320 should_repeat = true;
1321 }
1322 } while (should_repeat && (current_bci != -1));
1323 st.next();
1324 } while ((current_bci < 0) && (!st.at_end()));
1325
1326 jmethodID catch_jmethodID;
1327 if (current_bci < 0) {
1328 catch_jmethodID = 0;
1329 current_bci = 0;
1330 } else {
1331 catch_jmethodID = jem.to_jmethodID(
1332 methodHandle(thread, current_method));
1333 }
1334
1335 JvmtiJavaThreadEventTransition jet(thread);
1336 jvmtiEventException callback = env->callbacks()->Exception;
1337 if (callback != NULL) {
1338 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1339 jem.jni_methodID(), jem.location(),
1340 jem.exception(),
1341 catch_jmethodID, current_bci);
1342 }
1343 }
1344 }
1345 }
1346
1347 // frames may get popped because of this throw, be safe - invalidate cached depth
1348 state->invalidate_cur_stack_depth();
1349 }
1350
1351
1352 void JvmtiExport::notice_unwind_due_to_exception(JavaThread *thread, Method* method, address location, oop exception, bool in_handler_frame) {
1353 HandleMark hm(thread);
1354 methodHandle mh(thread, method);
1355 Handle exception_handle(thread, exception);
1356
1357 JvmtiThreadState *state = thread->jvmti_thread_state();
1358 if (state == NULL) {
1359 return;
1360 }
1361 EVT_TRIG_TRACE(JVMTI_EVENT_EXCEPTION_CATCH,
1362 ("JVMTI [%s] Trg unwind_due_to_exception triggered %s.%s @ %s%d - %s",
1363 JvmtiTrace::safe_get_thread_name(thread),
1364 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1365 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1366 location==0? "no location:" : "",
1367 location==0? 0 : location - mh()->code_base(),
1368 in_handler_frame? "in handler frame" : "not handler frame" ));
1369
1370 if (state->is_exception_detected()) {
1371
1372 state->invalidate_cur_stack_depth();
1373 if (!in_handler_frame) {
1374 // Not in exception handler.
1375 if(state->is_interp_only_mode()) {
1376 // method exit and frame pop events are posted only in interp mode.
1377 // When these events are enabled code should be in running in interp mode.
1378 JvmtiExport::post_method_exit(thread, method, thread->last_frame());
1379 // The cached cur_stack_depth might have changed from the
1380 // operations of frame pop or method exit. We are not 100% sure
1381 // the cached cur_stack_depth is still valid depth so invalidate
1382 // it.
1383 state->invalidate_cur_stack_depth();
1384 }
1385 } else {
1386 // In exception handler frame. Report exception catch.
1387 assert(location != NULL, "must be a known location");
1388 // Update cur_stack_depth - the frames above the current frame
1389 // have been unwound due to this exception:
1390 assert(!state->is_exception_caught(), "exception must not be caught yet.");
1391 state->set_exception_caught();
1392
1393 JvmtiEnvThreadStateIterator it(state);
1394 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1395 if (ets->is_enabled(JVMTI_EVENT_EXCEPTION_CATCH) && (exception_handle() != NULL)) {
1396 EVT_TRACE(JVMTI_EVENT_EXCEPTION_CATCH,
1397 ("JVMTI [%s] Evt ExceptionCatch sent %s.%s @ %d",
1398 JvmtiTrace::safe_get_thread_name(thread),
1399 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1400 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1401 location - mh()->code_base() ));
1402
1403 JvmtiEnv *env = ets->get_env();
1404 JvmtiExceptionEventMark jem(thread, mh, location, exception_handle);
1405 JvmtiJavaThreadEventTransition jet(thread);
1406 jvmtiEventExceptionCatch callback = env->callbacks()->ExceptionCatch;
1407 if (callback != NULL) {
1408 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1409 jem.jni_methodID(), jem.location(),
1410 jem.exception());
1411 }
1412 }
1413 }
1414 }
1415 }
1416 }
1417
1418 oop JvmtiExport::jni_GetField_probe(JavaThread *thread, jobject jobj, oop obj,
1419 Klass* klass, jfieldID fieldID, bool is_static) {
1420 if (*((int *)get_field_access_count_addr()) > 0 && thread->has_last_Java_frame()) {
1421 // At least one field access watch is set so we have more work
1422 // to do. This wrapper is used by entry points that allow us
1423 // to create handles in post_field_access_by_jni().
1424 post_field_access_by_jni(thread, obj, klass, fieldID, is_static);
1425 // event posting can block so refetch oop if we were passed a jobj
1426 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj);
1427 }
1428 return obj;
1429 }
1430
1431 oop JvmtiExport::jni_GetField_probe_nh(JavaThread *thread, jobject jobj, oop obj,
1432 Klass* klass, jfieldID fieldID, bool is_static) {
1433 if (*((int *)get_field_access_count_addr()) > 0 && thread->has_last_Java_frame()) {
1434 // At least one field access watch is set so we have more work
1435 // to do. This wrapper is used by "quick" entry points that don't
1436 // allow us to create handles in post_field_access_by_jni(). We
1437 // override that with a ResetNoHandleMark.
1438 ResetNoHandleMark rnhm;
1439 post_field_access_by_jni(thread, obj, klass, fieldID, is_static);
1440 // event posting can block so refetch oop if we were passed a jobj
1441 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj);
1442 }
1443 return obj;
1444 }
1445
1446 void JvmtiExport::post_field_access_by_jni(JavaThread *thread, oop obj,
1447 Klass* klass, jfieldID fieldID, bool is_static) {
1448 // We must be called with a Java context in order to provide reasonable
1449 // values for the klazz, method, and location fields. The callers of this
1450 // function don't make the call unless there is a Java context.
1451 assert(thread->has_last_Java_frame(), "must be called with a Java context");
1452
1453 ResourceMark rm;
1454 fieldDescriptor fd;
1455 // if get_field_descriptor finds fieldID to be invalid, then we just bail
1456 bool valid_fieldID = JvmtiEnv::get_field_descriptor(klass, fieldID, &fd);
1457 assert(valid_fieldID == true,"post_field_access_by_jni called with invalid fieldID");
1458 if (!valid_fieldID) return;
1459 // field accesses are not watched so bail
1460 if (!fd.is_field_access_watched()) return;
1461
1462 HandleMark hm(thread);
1463 KlassHandle h_klass(thread, klass);
1464 Handle h_obj;
1465 if (!is_static) {
1466 // non-static field accessors have an object, but we need a handle
1467 assert(obj != NULL, "non-static needs an object");
1468 h_obj = Handle(thread, obj);
1469 }
1470 post_field_access(thread,
1471 thread->last_frame().interpreter_frame_method(),
1472 thread->last_frame().interpreter_frame_bcp(),
1473 h_klass, h_obj, fieldID);
1474 }
1475
1476 void JvmtiExport::post_field_access(JavaThread *thread, Method* method,
1477 address location, KlassHandle field_klass, Handle object, jfieldID field) {
1478
1479 HandleMark hm(thread);
1480 methodHandle mh(thread, method);
1481
1482 JvmtiThreadState *state = thread->jvmti_thread_state();
1483 if (state == NULL) {
1484 return;
1485 }
1486 EVT_TRIG_TRACE(JVMTI_EVENT_FIELD_ACCESS, ("JVMTI [%s] Trg Field Access event triggered",
1487 JvmtiTrace::safe_get_thread_name(thread)));
1488 JvmtiEnvThreadStateIterator it(state);
1489 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1490 if (ets->is_enabled(JVMTI_EVENT_FIELD_ACCESS)) {
1491 EVT_TRACE(JVMTI_EVENT_FIELD_ACCESS, ("JVMTI [%s] Evt Field Access event sent %s.%s @ %d",
1492 JvmtiTrace::safe_get_thread_name(thread),
1493 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1494 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1495 location - mh()->code_base() ));
1496
1497 JvmtiEnv *env = ets->get_env();
1498 JvmtiLocationEventMark jem(thread, mh, location);
1499 jclass field_jclass = jem.to_jclass(field_klass());
1500 jobject field_jobject = jem.to_jobject(object());
1501 JvmtiJavaThreadEventTransition jet(thread);
1502 jvmtiEventFieldAccess callback = env->callbacks()->FieldAccess;
1503 if (callback != NULL) {
1504 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1505 jem.jni_methodID(), jem.location(),
1506 field_jclass, field_jobject, field);
1507 }
1508 }
1509 }
1510 }
1511
1512 oop JvmtiExport::jni_SetField_probe(JavaThread *thread, jobject jobj, oop obj,
1513 Klass* klass, jfieldID fieldID, bool is_static,
1514 char sig_type, jvalue *value) {
1515 if (*((int *)get_field_modification_count_addr()) > 0 && thread->has_last_Java_frame()) {
1516 // At least one field modification watch is set so we have more work
1517 // to do. This wrapper is used by entry points that allow us
1518 // to create handles in post_field_modification_by_jni().
1519 post_field_modification_by_jni(thread, obj, klass, fieldID, is_static, sig_type, value);
1520 // event posting can block so refetch oop if we were passed a jobj
1521 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj);
1522 }
1523 return obj;
1524 }
1525
1526 oop JvmtiExport::jni_SetField_probe_nh(JavaThread *thread, jobject jobj, oop obj,
1527 Klass* klass, jfieldID fieldID, bool is_static,
1528 char sig_type, jvalue *value) {
1529 if (*((int *)get_field_modification_count_addr()) > 0 && thread->has_last_Java_frame()) {
1530 // At least one field modification watch is set so we have more work
1531 // to do. This wrapper is used by "quick" entry points that don't
1532 // allow us to create handles in post_field_modification_by_jni(). We
1533 // override that with a ResetNoHandleMark.
1534 ResetNoHandleMark rnhm;
1535 post_field_modification_by_jni(thread, obj, klass, fieldID, is_static, sig_type, value);
1536 // event posting can block so refetch oop if we were passed a jobj
1537 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj);
1538 }
1539 return obj;
1540 }
1541
1542 void JvmtiExport::post_field_modification_by_jni(JavaThread *thread, oop obj,
1543 Klass* klass, jfieldID fieldID, bool is_static,
1544 char sig_type, jvalue *value) {
1545 // We must be called with a Java context in order to provide reasonable
1546 // values for the klazz, method, and location fields. The callers of this
1547 // function don't make the call unless there is a Java context.
1548 assert(thread->has_last_Java_frame(), "must be called with Java context");
1549
1550 ResourceMark rm;
1551 fieldDescriptor fd;
1552 // if get_field_descriptor finds fieldID to be invalid, then we just bail
1553 bool valid_fieldID = JvmtiEnv::get_field_descriptor(klass, fieldID, &fd);
1554 assert(valid_fieldID == true,"post_field_modification_by_jni called with invalid fieldID");
1555 if (!valid_fieldID) return;
1556 // field modifications are not watched so bail
1557 if (!fd.is_field_modification_watched()) return;
1558
1559 HandleMark hm(thread);
1560
1561 Handle h_obj;
1562 if (!is_static) {
1563 // non-static field accessors have an object, but we need a handle
1564 assert(obj != NULL, "non-static needs an object");
1565 h_obj = Handle(thread, obj);
1566 }
1567 KlassHandle h_klass(thread, klass);
1568 post_field_modification(thread,
1569 thread->last_frame().interpreter_frame_method(),
1570 thread->last_frame().interpreter_frame_bcp(),
1571 h_klass, h_obj, fieldID, sig_type, value);
1572 }
1573
1574 void JvmtiExport::post_raw_field_modification(JavaThread *thread, Method* method,
1575 address location, KlassHandle field_klass, Handle object, jfieldID field,
1576 char sig_type, jvalue *value) {
1577
1578 if (sig_type == 'I' || sig_type == 'Z' || sig_type == 'C' || sig_type == 'S') {
1579 // 'I' instructions are used for byte, char, short and int.
1580 // determine which it really is, and convert
1581 fieldDescriptor fd;
1582 bool found = JvmtiEnv::get_field_descriptor(field_klass(), field, &fd);
1583 // should be found (if not, leave as is)
1584 if (found) {
1585 jint ival = value->i;
1586 // convert value from int to appropriate type
1587 switch (fd.field_type()) {
1588 case T_BOOLEAN:
1589 sig_type = 'Z';
1590 value->i = 0; // clear it
1591 value->z = (jboolean)ival;
1592 break;
1593 case T_BYTE:
1594 sig_type = 'B';
1595 value->i = 0; // clear it
1596 value->b = (jbyte)ival;
1597 break;
1598 case T_CHAR:
1599 sig_type = 'C';
1600 value->i = 0; // clear it
1601 value->c = (jchar)ival;
1602 break;
1603 case T_SHORT:
1604 sig_type = 'S';
1605 value->i = 0; // clear it
1606 value->s = (jshort)ival;
1607 break;
1608 case T_INT:
1609 // nothing to do
1610 break;
1611 default:
1612 // this is an integer instruction, should be one of above
1613 ShouldNotReachHere();
1614 break;
1615 }
1616 }
1617 }
1618
1619 // convert oop to JNI handle.
1620 if (sig_type == 'L' || sig_type == '[') {
1621 value->l = (jobject)JNIHandles::make_local(thread, (oop)value->l);
1622 }
1623
1624 post_field_modification(thread, method, location, field_klass, object, field, sig_type, value);
1625
1626 // Destroy the JNI handle allocated above.
1627 if (sig_type == 'L') {
1628 JNIHandles::destroy_local(value->l);
1629 }
1630 }
1631
1632 void JvmtiExport::post_field_modification(JavaThread *thread, Method* method,
1633 address location, KlassHandle field_klass, Handle object, jfieldID field,
1634 char sig_type, jvalue *value_ptr) {
1635
1636 HandleMark hm(thread);
1637 methodHandle mh(thread, method);
1638
1639 JvmtiThreadState *state = thread->jvmti_thread_state();
1640 if (state == NULL) {
1641 return;
1642 }
1643 EVT_TRIG_TRACE(JVMTI_EVENT_FIELD_MODIFICATION,
1644 ("JVMTI [%s] Trg Field Modification event triggered",
1645 JvmtiTrace::safe_get_thread_name(thread)));
1646
1647 JvmtiEnvThreadStateIterator it(state);
1648 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1649 if (ets->is_enabled(JVMTI_EVENT_FIELD_MODIFICATION)) {
1650 EVT_TRACE(JVMTI_EVENT_FIELD_MODIFICATION,
1651 ("JVMTI [%s] Evt Field Modification event sent %s.%s @ %d",
1652 JvmtiTrace::safe_get_thread_name(thread),
1653 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1654 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1655 location - mh()->code_base() ));
1656
1657 JvmtiEnv *env = ets->get_env();
1658 JvmtiLocationEventMark jem(thread, mh, location);
1659 jclass field_jclass = jem.to_jclass(field_klass());
1660 jobject field_jobject = jem.to_jobject(object());
1661 JvmtiJavaThreadEventTransition jet(thread);
1662 jvmtiEventFieldModification callback = env->callbacks()->FieldModification;
1663 if (callback != NULL) {
1664 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1665 jem.jni_methodID(), jem.location(),
1666 field_jclass, field_jobject, field, sig_type, *value_ptr);
1667 }
1668 }
1669 }
1670 }
1671
1672 void JvmtiExport::post_native_method_bind(Method* method, address* function_ptr) {
1673 JavaThread* thread = JavaThread::current();
1674 assert(thread->thread_state() == _thread_in_vm, "must be in vm state");
1675
1676 HandleMark hm(thread);
1677 methodHandle mh(thread, method);
1678
1679 EVT_TRIG_TRACE(JVMTI_EVENT_NATIVE_METHOD_BIND, ("JVMTI [%s] Trg Native Method Bind event triggered",
1680 JvmtiTrace::safe_get_thread_name(thread)));
1681
1682 if (JvmtiEventController::is_enabled(JVMTI_EVENT_NATIVE_METHOD_BIND)) {
1683 JvmtiEnvIterator it;
1684 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1685 if (env->is_enabled(JVMTI_EVENT_NATIVE_METHOD_BIND)) {
1686 EVT_TRACE(JVMTI_EVENT_NATIVE_METHOD_BIND, ("JVMTI [%s] Evt Native Method Bind event sent",
1687 JvmtiTrace::safe_get_thread_name(thread) ));
1688
1689 JvmtiMethodEventMark jem(thread, mh);
1690 JvmtiJavaThreadEventTransition jet(thread);
1691 JNIEnv* jni_env = JvmtiEnv::get_phase() == JVMTI_PHASE_PRIMORDIAL? NULL : jem.jni_env();
1692 jvmtiEventNativeMethodBind callback = env->callbacks()->NativeMethodBind;
1693 if (callback != NULL) {
1694 (*callback)(env->jvmti_external(), jni_env, jem.jni_thread(),
1695 jem.jni_methodID(), (void*)(*function_ptr), (void**)function_ptr);
1696 }
1697 }
1698 }
1699 }
1700 }
1701
1702 // Returns a record containing inlining information for the given nmethod
1703 jvmtiCompiledMethodLoadInlineRecord* create_inline_record(nmethod* nm) {
1704 jint numstackframes = 0;
1705 jvmtiCompiledMethodLoadInlineRecord* record = (jvmtiCompiledMethodLoadInlineRecord*)NEW_RESOURCE_OBJ(jvmtiCompiledMethodLoadInlineRecord);
1706 record->header.kind = JVMTI_CMLR_INLINE_INFO;
1707 record->header.next = NULL;
1708 record->header.majorinfoversion = JVMTI_CMLR_MAJOR_VERSION_1;
1709 record->header.minorinfoversion = JVMTI_CMLR_MINOR_VERSION_0;
1710 record->numpcs = 0;
1711 for(PcDesc* p = nm->scopes_pcs_begin(); p < nm->scopes_pcs_end(); p++) {
1712 if(p->scope_decode_offset() == DebugInformationRecorder::serialized_null) continue;
1713 record->numpcs++;
1714 }
1715 record->pcinfo = (PCStackInfo*)(NEW_RESOURCE_ARRAY(PCStackInfo, record->numpcs));
1716 int scope = 0;
1717 for(PcDesc* p = nm->scopes_pcs_begin(); p < nm->scopes_pcs_end(); p++) {
1718 if(p->scope_decode_offset() == DebugInformationRecorder::serialized_null) continue;
1719 void* pc_address = (void*)p->real_pc(nm);
1720 assert(pc_address != NULL, "pc_address must be non-null");
1721 record->pcinfo[scope].pc = pc_address;
1722 numstackframes=0;
1723 for(ScopeDesc* sd = nm->scope_desc_at(p->real_pc(nm));sd != NULL;sd = sd->sender()) {
1724 numstackframes++;
1725 }
1726 assert(numstackframes != 0, "numstackframes must be nonzero.");
1727 record->pcinfo[scope].methods = (jmethodID *)NEW_RESOURCE_ARRAY(jmethodID, numstackframes);
1728 record->pcinfo[scope].bcis = (jint *)NEW_RESOURCE_ARRAY(jint, numstackframes);
1729 record->pcinfo[scope].numstackframes = numstackframes;
1730 int stackframe = 0;
1731 for(ScopeDesc* sd = nm->scope_desc_at(p->real_pc(nm));sd != NULL;sd = sd->sender()) {
1732 // sd->method() can be NULL for stubs but not for nmethods. To be completely robust, include an assert that we should never see a null sd->method()
1733 assert(sd->method() != NULL, "sd->method() cannot be null.");
1734 record->pcinfo[scope].methods[stackframe] = sd->method()->jmethod_id();
1735 record->pcinfo[scope].bcis[stackframe] = sd->bci();
1736 stackframe++;
1737 }
1738 scope++;
1739 }
1740 return record;
1741 }
1742
1743 void JvmtiExport::post_compiled_method_load(nmethod *nm) {
1744 JavaThread* thread = JavaThread::current();
1745
1746 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
1747 ("JVMTI [%s] method compile load event triggered",
1748 JvmtiTrace::safe_get_thread_name(thread)));
1749
1750 JvmtiEnvIterator it;
1751 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1752 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_LOAD)) {
1753
1754 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
1755 ("JVMTI [%s] class compile method load event sent %s.%s ",
1756 JvmtiTrace::safe_get_thread_name(thread),
1757 (nm->method() == NULL) ? "NULL" : nm->method()->klass_name()->as_C_string(),
1758 (nm->method() == NULL) ? "NULL" : nm->method()->name()->as_C_string()));
1759 ResourceMark rm(thread);
1760 HandleMark hm(thread);
1761
1762 // Add inlining information
1763 jvmtiCompiledMethodLoadInlineRecord* inlinerecord = create_inline_record(nm);
1764 // Pass inlining information through the void pointer
1765 JvmtiCompiledMethodLoadEventMark jem(thread, nm, inlinerecord);
1766 JvmtiJavaThreadEventTransition jet(thread);
1767 jvmtiEventCompiledMethodLoad callback = env->callbacks()->CompiledMethodLoad;
1768 if (callback != NULL) {
1769 (*callback)(env->jvmti_external(), jem.jni_methodID(),
1770 jem.code_size(), jem.code_data(), jem.map_length(),
1771 jem.map(), jem.compile_info());
1772 }
1773 }
1774 }
1775 }
1776
1777
1778 // post a COMPILED_METHOD_LOAD event for a given environment
1779 void JvmtiExport::post_compiled_method_load(JvmtiEnv* env, const jmethodID method, const jint length,
1780 const void *code_begin, const jint map_length,
1781 const jvmtiAddrLocationMap* map)
1782 {
1783 JavaThread* thread = JavaThread::current();
1784 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
1785 ("JVMTI [%s] method compile load event triggered (by GenerateEvents)",
1786 JvmtiTrace::safe_get_thread_name(thread)));
1787 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_LOAD)) {
1788
1789 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
1790 ("JVMTI [%s] class compile method load event sent (by GenerateEvents), jmethodID=" PTR_FORMAT,
1791 JvmtiTrace::safe_get_thread_name(thread), method));
1792
1793 JvmtiEventMark jem(thread);
1794 JvmtiJavaThreadEventTransition jet(thread);
1795 jvmtiEventCompiledMethodLoad callback = env->callbacks()->CompiledMethodLoad;
1796 if (callback != NULL) {
1797 (*callback)(env->jvmti_external(), method,
1798 length, code_begin, map_length,
1799 map, NULL);
1800 }
1801 }
1802 }
1803
1804 void JvmtiExport::post_dynamic_code_generated_internal(const char *name, const void *code_begin, const void *code_end) {
1805 assert(name != NULL && name[0] != '\0', "sanity check");
1806
1807 JavaThread* thread = JavaThread::current();
1808 // In theory everyone coming thru here is in_vm but we need to be certain
1809 // because a callee will do a vm->native transition
1810 ThreadInVMfromUnknown __tiv;
1811
1812 EVT_TRIG_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED,
1813 ("JVMTI [%s] method dynamic code generated event triggered",
1814 JvmtiTrace::safe_get_thread_name(thread)));
1815 JvmtiEnvIterator it;
1816 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1817 if (env->is_enabled(JVMTI_EVENT_DYNAMIC_CODE_GENERATED)) {
1818 EVT_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED,
1819 ("JVMTI [%s] dynamic code generated event sent for %s",
1820 JvmtiTrace::safe_get_thread_name(thread), name));
1821 JvmtiEventMark jem(thread);
1822 JvmtiJavaThreadEventTransition jet(thread);
1823 jint length = (jint)pointer_delta(code_end, code_begin, sizeof(char));
1824 jvmtiEventDynamicCodeGenerated callback = env->callbacks()->DynamicCodeGenerated;
1825 if (callback != NULL) {
1826 (*callback)(env->jvmti_external(), name, (void*)code_begin, length);
1827 }
1828 }
1829 }
1830 }
1831
1832 void JvmtiExport::post_dynamic_code_generated(const char *name, const void *code_begin, const void *code_end) {
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 } else {
1837 // It may not be safe to post the event from this thread. Defer all
1838 // postings to the service thread so that it can perform them in a safe
1839 // context and in-order.
1840 MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag);
1841 JvmtiDeferredEvent event = JvmtiDeferredEvent::dynamic_code_generated_event(
1842 name, code_begin, code_end);
1843 JvmtiDeferredEventQueue::enqueue(event);
1844 }
1845 }
1846
1847
1848 // post a DYNAMIC_CODE_GENERATED event for a given environment
1849 // used by GenerateEvents
1850 void JvmtiExport::post_dynamic_code_generated(JvmtiEnv* env, const char *name,
1851 const void *code_begin, const void *code_end)
1852 {
1853 JavaThread* thread = JavaThread::current();
1854 EVT_TRIG_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED,
1855 ("JVMTI [%s] dynamic code generated event triggered (by GenerateEvents)",
1856 JvmtiTrace::safe_get_thread_name(thread)));
1857 if (env->is_enabled(JVMTI_EVENT_DYNAMIC_CODE_GENERATED)) {
1858 EVT_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED,
1859 ("JVMTI [%s] dynamic code generated event sent for %s",
1860 JvmtiTrace::safe_get_thread_name(thread), name));
1861 JvmtiEventMark jem(thread);
1862 JvmtiJavaThreadEventTransition jet(thread);
1863 jint length = (jint)pointer_delta(code_end, code_begin, sizeof(char));
1864 jvmtiEventDynamicCodeGenerated callback = env->callbacks()->DynamicCodeGenerated;
1865 if (callback != NULL) {
1866 (*callback)(env->jvmti_external(), name, (void*)code_begin, length);
1867 }
1868 }
1869 }
1870
1871 // post a DynamicCodeGenerated event while holding locks in the VM.
1872 void JvmtiExport::post_dynamic_code_generated_while_holding_locks(const char* name,
1873 address code_begin, address code_end)
1874 {
1875 // register the stub with the current dynamic code event collector
1876 JvmtiThreadState* state = JvmtiThreadState::state_for(JavaThread::current());
1877 // state can only be NULL if the current thread is exiting which
1878 // should not happen since we're trying to post an event
1879 guarantee(state != NULL, "attempt to register stub via an exiting thread");
1880 JvmtiDynamicCodeEventCollector* collector = state->get_dynamic_code_event_collector();
1881 guarantee(collector != NULL, "attempt to register stub without event collector");
1882 collector->register_stub(name, code_begin, code_end);
1883 }
1884
1885 // Collect all the vm internally allocated objects which are visible to java world
1886 void JvmtiExport::record_vm_internal_object_allocation(oop obj) {
1887 Thread* thread = ThreadLocalStorage::thread();
1888 if (thread != NULL && thread->is_Java_thread()) {
1889 // Can not take safepoint here.
1890 No_Safepoint_Verifier no_sfpt;
1891 // Can not take safepoint here so can not use state_for to get
1892 // jvmti thread state.
1893 JvmtiThreadState *state = ((JavaThread*)thread)->jvmti_thread_state();
1894 if (state != NULL ) {
1895 // state is non NULL when VMObjectAllocEventCollector is enabled.
1896 JvmtiVMObjectAllocEventCollector *collector;
1897 collector = state->get_vm_object_alloc_event_collector();
1898 if (collector != NULL && collector->is_enabled()) {
1899 // Don't record classes as these will be notified via the ClassLoad
1900 // event.
1901 if (obj->klass() != SystemDictionary::Class_klass()) {
1902 collector->record_allocation(obj);
1903 }
1904 }
1905 }
1906 }
1907 }
1908
1909 void JvmtiExport::post_garbage_collection_finish() {
1910 Thread *thread = Thread::current(); // this event is posted from VM-Thread.
1911 EVT_TRIG_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH,
1912 ("JVMTI [%s] garbage collection finish event triggered",
1913 JvmtiTrace::safe_get_thread_name(thread)));
1914 JvmtiEnvIterator it;
1915 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1916 if (env->is_enabled(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH)) {
1917 EVT_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH,
1918 ("JVMTI [%s] garbage collection finish event sent ",
1919 JvmtiTrace::safe_get_thread_name(thread)));
1920 JvmtiThreadEventTransition jet(thread);
1921 // JNIEnv is NULL here because this event is posted from VM Thread
1922 jvmtiEventGarbageCollectionFinish callback = env->callbacks()->GarbageCollectionFinish;
1923 if (callback != NULL) {
1924 (*callback)(env->jvmti_external());
1925 }
1926 }
1927 }
1928 }
1929
1930 void JvmtiExport::post_garbage_collection_start() {
1931 Thread* thread = Thread::current(); // this event is posted from vm-thread.
1932 EVT_TRIG_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_START,
1933 ("JVMTI [%s] garbage collection start event triggered",
1934 JvmtiTrace::safe_get_thread_name(thread)));
1935 JvmtiEnvIterator it;
1936 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1937 if (env->is_enabled(JVMTI_EVENT_GARBAGE_COLLECTION_START)) {
1938 EVT_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_START,
1939 ("JVMTI [%s] garbage collection start event sent ",
1940 JvmtiTrace::safe_get_thread_name(thread)));
1941 JvmtiThreadEventTransition jet(thread);
1942 // JNIEnv is NULL here because this event is posted from VM Thread
1943 jvmtiEventGarbageCollectionStart callback = env->callbacks()->GarbageCollectionStart;
1944 if (callback != NULL) {
1945 (*callback)(env->jvmti_external());
1946 }
1947 }
1948 }
1949 }
1950
1951 void JvmtiExport::post_data_dump() {
1952 Thread *thread = Thread::current();
1953 EVT_TRIG_TRACE(JVMTI_EVENT_DATA_DUMP_REQUEST,
1954 ("JVMTI [%s] data dump request event triggered",
1955 JvmtiTrace::safe_get_thread_name(thread)));
1956 JvmtiEnvIterator it;
1957 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1958 if (env->is_enabled(JVMTI_EVENT_DATA_DUMP_REQUEST)) {
1959 EVT_TRACE(JVMTI_EVENT_DATA_DUMP_REQUEST,
1960 ("JVMTI [%s] data dump request event sent ",
1961 JvmtiTrace::safe_get_thread_name(thread)));
1962 JvmtiThreadEventTransition jet(thread);
1963 // JNIEnv is NULL here because this event is posted from VM Thread
1964 jvmtiEventDataDumpRequest callback = env->callbacks()->DataDumpRequest;
1965 if (callback != NULL) {
1966 (*callback)(env->jvmti_external());
1967 }
1968 }
1969 }
1970 }
1971
1972 void JvmtiExport::post_monitor_contended_enter(JavaThread *thread, ObjectMonitor *obj_mntr) {
1973 oop object = (oop)obj_mntr->object();
1974 if (!ServiceUtil::visible_oop(object)) {
1975 // Ignore monitor contended enter for vm internal object.
1976 return;
1977 }
1978 JvmtiThreadState *state = thread->jvmti_thread_state();
1979 if (state == NULL) {
1980 return;
1981 }
1982
1983 HandleMark hm(thread);
1984 Handle h(thread, object);
1985
1986 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTER,
1987 ("JVMTI [%s] montior contended enter event triggered",
1988 JvmtiTrace::safe_get_thread_name(thread)));
1989
1990 JvmtiEnvThreadStateIterator it(state);
1991 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1992 if (ets->is_enabled(JVMTI_EVENT_MONITOR_CONTENDED_ENTER)) {
1993 EVT_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTER,
1994 ("JVMTI [%s] monitor contended enter event sent",
1995 JvmtiTrace::safe_get_thread_name(thread)));
1996 JvmtiMonitorEventMark jem(thread, h());
1997 JvmtiEnv *env = ets->get_env();
1998 JvmtiThreadEventTransition jet(thread);
1999 jvmtiEventMonitorContendedEnter callback = env->callbacks()->MonitorContendedEnter;
2000 if (callback != NULL) {
2001 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_object());
2002 }
2003 }
2004 }
2005 }
2006
2007 void JvmtiExport::post_monitor_contended_entered(JavaThread *thread, ObjectMonitor *obj_mntr) {
2008 oop object = (oop)obj_mntr->object();
2009 if (!ServiceUtil::visible_oop(object)) {
2010 // Ignore monitor contended entered for vm internal object.
2011 return;
2012 }
2013 JvmtiThreadState *state = thread->jvmti_thread_state();
2014 if (state == NULL) {
2015 return;
2016 }
2017
2018 HandleMark hm(thread);
2019 Handle h(thread, object);
2020
2021 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED,
2022 ("JVMTI [%s] montior contended entered event triggered",
2023 JvmtiTrace::safe_get_thread_name(thread)));
2024
2025 JvmtiEnvThreadStateIterator it(state);
2026 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
2027 if (ets->is_enabled(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED)) {
2028 EVT_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED,
2029 ("JVMTI [%s] monitor contended enter event sent",
2030 JvmtiTrace::safe_get_thread_name(thread)));
2031 JvmtiMonitorEventMark jem(thread, h());
2032 JvmtiEnv *env = ets->get_env();
2033 JvmtiThreadEventTransition jet(thread);
2034 jvmtiEventMonitorContendedEntered callback = env->callbacks()->MonitorContendedEntered;
2035 if (callback != NULL) {
2036 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_object());
2037 }
2038 }
2039 }
2040 }
2041
2042 void JvmtiExport::post_monitor_wait(JavaThread *thread, oop object,
2043 jlong timeout) {
2044 JvmtiThreadState *state = thread->jvmti_thread_state();
2045 if (state == NULL) {
2046 return;
2047 }
2048
2049 HandleMark hm(thread);
2050 Handle h(thread, object);
2051
2052 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_WAIT,
2053 ("JVMTI [%s] montior wait event triggered",
2054 JvmtiTrace::safe_get_thread_name(thread)));
2055
2056 JvmtiEnvThreadStateIterator it(state);
2057 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
2058 if (ets->is_enabled(JVMTI_EVENT_MONITOR_WAIT)) {
2059 EVT_TRACE(JVMTI_EVENT_MONITOR_WAIT,
2060 ("JVMTI [%s] monitor wait event sent ",
2061 JvmtiTrace::safe_get_thread_name(thread)));
2062 JvmtiMonitorEventMark jem(thread, h());
2063 JvmtiEnv *env = ets->get_env();
2064 JvmtiThreadEventTransition jet(thread);
2065 jvmtiEventMonitorWait callback = env->callbacks()->MonitorWait;
2066 if (callback != NULL) {
2067 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
2068 jem.jni_object(), timeout);
2069 }
2070 }
2071 }
2072 }
2073
2074 void JvmtiExport::post_monitor_waited(JavaThread *thread, ObjectMonitor *obj_mntr, jboolean timed_out) {
2075 oop object = (oop)obj_mntr->object();
2076 if (!ServiceUtil::visible_oop(object)) {
2077 // Ignore monitor waited for vm internal object.
2078 return;
2079 }
2080 JvmtiThreadState *state = thread->jvmti_thread_state();
2081 if (state == NULL) {
2082 return;
2083 }
2084
2085 HandleMark hm(thread);
2086 Handle h(thread, object);
2087
2088 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_WAITED,
2089 ("JVMTI [%s] montior waited event triggered",
2090 JvmtiTrace::safe_get_thread_name(thread)));
2091
2092 JvmtiEnvThreadStateIterator it(state);
2093 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
2094 if (ets->is_enabled(JVMTI_EVENT_MONITOR_WAITED)) {
2095 EVT_TRACE(JVMTI_EVENT_MONITOR_WAITED,
2096 ("JVMTI [%s] monitor waited event sent ",
2097 JvmtiTrace::safe_get_thread_name(thread)));
2098 JvmtiMonitorEventMark jem(thread, h());
2099 JvmtiEnv *env = ets->get_env();
2100 JvmtiThreadEventTransition jet(thread);
2101 jvmtiEventMonitorWaited callback = env->callbacks()->MonitorWaited;
2102 if (callback != NULL) {
2103 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
2104 jem.jni_object(), timed_out);
2105 }
2106 }
2107 }
2108 }
2109
2110
2111 void JvmtiExport::post_vm_object_alloc(JavaThread *thread, oop object) {
2112 EVT_TRIG_TRACE(JVMTI_EVENT_VM_OBJECT_ALLOC, ("JVMTI [%s] Trg vm object alloc triggered",
2113 JvmtiTrace::safe_get_thread_name(thread)));
2114 if (object == NULL) {
2115 return;
2116 }
2117 HandleMark hm(thread);
2118 Handle h(thread, object);
2119 JvmtiEnvIterator it;
2120 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
2121 if (env->is_enabled(JVMTI_EVENT_VM_OBJECT_ALLOC)) {
2122 EVT_TRACE(JVMTI_EVENT_VM_OBJECT_ALLOC, ("JVMTI [%s] Evt vmobject alloc sent %s",
2123 JvmtiTrace::safe_get_thread_name(thread),
2124 object==NULL? "NULL" : java_lang_Class::as_Klass(object)->external_name()));
2125
2126 JvmtiVMObjectAllocEventMark jem(thread, h());
2127 JvmtiJavaThreadEventTransition jet(thread);
2128 jvmtiEventVMObjectAlloc callback = env->callbacks()->VMObjectAlloc;
2129 if (callback != NULL) {
2130 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
2131 jem.jni_jobject(), jem.jni_class(), jem.size());
2132 }
2133 }
2134 }
2135 }
2136
2137 ////////////////////////////////////////////////////////////////////////////////////////////////
2138
2139 void JvmtiExport::cleanup_thread(JavaThread* thread) {
2140 assert(JavaThread::current() == thread, "thread is not current");
2141 MutexLocker mu(JvmtiThreadState_lock);
2142
2143 if (thread->jvmti_thread_state() != NULL) {
2144 // This has to happen after the thread state is removed, which is
2145 // why it is not in post_thread_end_event like its complement
2146 // Maybe both these functions should be rolled into the posts?
2147 JvmtiEventController::thread_ended(thread);
2148 }
2149 }
2150
2151 void JvmtiExport::oops_do(OopClosure* f) {
2152 JvmtiCurrentBreakpoints::oops_do(f);
2153 JvmtiVMObjectAllocEventCollector::oops_do_for_all_threads(f);
2154 }
2155
2156 void JvmtiExport::weak_oops_do(BoolObjectClosure* is_alive, OopClosure* f) {
2157 JvmtiTagMap::weak_oops_do(is_alive, f);
2158 }
2159
2160 void JvmtiExport::gc_epilogue() {
2161 JvmtiCurrentBreakpoints::gc_epilogue();
2162 }
2163
2164 // Onload raw monitor transition.
2165 void JvmtiExport::transition_pending_onload_raw_monitors() {
2166 JvmtiPendingMonitors::transition_raw_monitors();
2167 }
2168
2169 ////////////////////////////////////////////////////////////////////////////////////////////////
2170
2171 // type for the Agent_OnAttach entry point
2172 extern "C" {
2173 typedef jint (JNICALL *OnAttachEntry_t)(JavaVM*, char *, void *);
2174 }
2175
2176 #ifndef SERVICES_KERNEL
2177 jint JvmtiExport::load_agent_library(AttachOperation* op, outputStream* st) {
2178 char ebuf[1024];
2179 char buffer[JVM_MAXPATHLEN];
2180 void* library = NULL;
2181 jint result = JNI_ERR;
2182
2183 // get agent name and options
2184 const char* agent = op->arg(0);
2185 const char* absParam = op->arg(1);
2186 const char* options = op->arg(2);
2187
2188 // The abs paramter should be "true" or "false"
2189 bool is_absolute_path = (absParam != NULL) && (strcmp(absParam,"true")==0);
2190
2191
2192 // If the path is absolute we attempt to load the library. Otherwise we try to
2193 // load it from the standard dll directory.
2194
2195 if (is_absolute_path) {
2196 library = os::dll_load(agent, ebuf, sizeof ebuf);
2197 } else {
2198 // Try to load the agent from the standard dll directory
2199 if (os::dll_build_name(buffer, sizeof(buffer), Arguments::get_dll_dir(),
2200 agent)) {
2201 library = os::dll_load(buffer, ebuf, sizeof ebuf);
2202 }
2203 if (library == NULL) {
2204 // not found - try local path
2205 char ns[1] = {0};
2206 if (os::dll_build_name(buffer, sizeof(buffer), ns, agent)) {
2207 library = os::dll_load(buffer, ebuf, sizeof ebuf);
2208 }
2209 }
2210 }
2211
2212 // If the library was loaded then we attempt to invoke the Agent_OnAttach
2213 // function
2214 if (library != NULL) {
2215
2216 // Lookup the Agent_OnAttach function
2217 OnAttachEntry_t on_attach_entry = NULL;
2218 const char *on_attach_symbols[] = AGENT_ONATTACH_SYMBOLS;
2219 for (uint symbol_index = 0; symbol_index < ARRAY_SIZE(on_attach_symbols); symbol_index++) {
2220 on_attach_entry =
2221 CAST_TO_FN_PTR(OnAttachEntry_t, os::dll_lookup(library, on_attach_symbols[symbol_index]));
2222 if (on_attach_entry != NULL) break;
2223 }
2224
2225 if (on_attach_entry == NULL) {
2226 // Agent_OnAttach missing - unload library
2227 os::dll_unload(library);
2228 } else {
2229 // Invoke the Agent_OnAttach function
2230 JavaThread* THREAD = JavaThread::current();
2231 {
2232 extern struct JavaVM_ main_vm;
2233 JvmtiThreadEventMark jem(THREAD);
2234 JvmtiJavaThreadEventTransition jet(THREAD);
2235
2236 result = (*on_attach_entry)(&main_vm, (char*)options, NULL);
2237 }
2238
2239 // Agent_OnAttach may have used JNI
2240 if (HAS_PENDING_EXCEPTION) {
2241 CLEAR_PENDING_EXCEPTION;
2242 }
2243
2244 // If OnAttach returns JNI_OK then we add it to the list of
2245 // agent libraries so that we can call Agent_OnUnload later.
2246 if (result == JNI_OK) {
2247 Arguments::add_loaded_agent(agent, (char*)options, is_absolute_path, library);
2248 }
2249
2250 // Agent_OnAttach executed so completion status is JNI_OK
2251 st->print_cr("%d", result);
2252 result = JNI_OK;
2253 }
2254 }
2255 return result;
2256 }
2257 #endif // SERVICES_KERNEL
2258
2259 ////////////////////////////////////////////////////////////////////////////////////////////////
2260
2261 // Setup current current thread for event collection.
2262 void JvmtiEventCollector::setup_jvmti_thread_state() {
2263 // set this event collector to be the current one.
2264 JvmtiThreadState* state = JvmtiThreadState::state_for(JavaThread::current());
2265 // state can only be NULL if the current thread is exiting which
2266 // should not happen since we're trying to configure for event collection
2267 guarantee(state != NULL, "exiting thread called setup_jvmti_thread_state");
2268 if (is_vm_object_alloc_event()) {
2269 _prev = state->get_vm_object_alloc_event_collector();
2270 state->set_vm_object_alloc_event_collector((JvmtiVMObjectAllocEventCollector *)this);
2271 } else if (is_dynamic_code_event()) {
2272 _prev = state->get_dynamic_code_event_collector();
2273 state->set_dynamic_code_event_collector((JvmtiDynamicCodeEventCollector *)this);
2274 }
2275 }
2276
2277 // Unset current event collection in this thread and reset it with previous
2278 // collector.
2279 void JvmtiEventCollector::unset_jvmti_thread_state() {
2280 JvmtiThreadState* state = JavaThread::current()->jvmti_thread_state();
2281 if (state != NULL) {
2282 // restore the previous event collector (if any)
2283 if (is_vm_object_alloc_event()) {
2284 if (state->get_vm_object_alloc_event_collector() == this) {
2285 state->set_vm_object_alloc_event_collector((JvmtiVMObjectAllocEventCollector *)_prev);
2286 } else {
2287 // this thread's jvmti state was created during the scope of
2288 // the event collector.
2289 }
2290 } else {
2291 if (is_dynamic_code_event()) {
2292 if (state->get_dynamic_code_event_collector() == this) {
2293 state->set_dynamic_code_event_collector((JvmtiDynamicCodeEventCollector *)_prev);
2294 } else {
2295 // this thread's jvmti state was created during the scope of
2296 // the event collector.
2297 }
2298 }
2299 }
2300 }
2301 }
2302
2303 // create the dynamic code event collector
2304 JvmtiDynamicCodeEventCollector::JvmtiDynamicCodeEventCollector() : _code_blobs(NULL) {
2305 if (JvmtiExport::should_post_dynamic_code_generated()) {
2306 setup_jvmti_thread_state();
2307 }
2308 }
2309
2310 // iterate over any code blob descriptors collected and post a
2311 // DYNAMIC_CODE_GENERATED event to the profiler.
2312 JvmtiDynamicCodeEventCollector::~JvmtiDynamicCodeEventCollector() {
2313 assert(!JavaThread::current()->owns_locks(), "all locks must be released to post deferred events");
2314 // iterate over any code blob descriptors that we collected
2315 if (_code_blobs != NULL) {
2316 for (int i=0; i<_code_blobs->length(); i++) {
2317 JvmtiCodeBlobDesc* blob = _code_blobs->at(i);
2318 JvmtiExport::post_dynamic_code_generated(blob->name(), blob->code_begin(), blob->code_end());
2319 FreeHeap(blob);
2320 }
2321 delete _code_blobs;
2322 }
2323 unset_jvmti_thread_state();
2324 }
2325
2326 // register a stub
2327 void JvmtiDynamicCodeEventCollector::register_stub(const char* name, address start, address end) {
2328 if (_code_blobs == NULL) {
2329 _code_blobs = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<JvmtiCodeBlobDesc*>(1,true);
2330 }
2331 _code_blobs->append(new JvmtiCodeBlobDesc(name, start, end));
2332 }
2333
2334 // Setup current thread to record vm allocated objects.
2335 JvmtiVMObjectAllocEventCollector::JvmtiVMObjectAllocEventCollector() : _allocated(NULL) {
2336 if (JvmtiExport::should_post_vm_object_alloc()) {
2337 _enable = true;
2338 setup_jvmti_thread_state();
2339 } else {
2340 _enable = false;
2341 }
2342 }
2343
2344 // Post vm_object_alloc event for vm allocated objects visible to java
2345 // world.
2346 JvmtiVMObjectAllocEventCollector::~JvmtiVMObjectAllocEventCollector() {
2347 if (_allocated != NULL) {
2348 set_enabled(false);
2349 for (int i = 0; i < _allocated->length(); i++) {
2350 oop obj = _allocated->at(i);
2351 if (ServiceUtil::visible_oop(obj)) {
2352 JvmtiExport::post_vm_object_alloc(JavaThread::current(), obj);
2353 }
2354 }
2355 delete _allocated;
2356 }
2357 unset_jvmti_thread_state();
2358 }
2359
2360 void JvmtiVMObjectAllocEventCollector::record_allocation(oop obj) {
2361 assert(is_enabled(), "VM object alloc event collector is not enabled");
2362 if (_allocated == NULL) {
2363 _allocated = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<oop>(1, true);
2364 }
2365 _allocated->push(obj);
2366 }
2367
2368 // GC support.
2369 void JvmtiVMObjectAllocEventCollector::oops_do(OopClosure* f) {
2370 if (_allocated != NULL) {
2371 for(int i=_allocated->length() - 1; i >= 0; i--) {
2372 if (_allocated->at(i) != NULL) {
2373 f->do_oop(_allocated->adr_at(i));
2374 }
2375 }
2376 }
2377 }
2378
2379 void JvmtiVMObjectAllocEventCollector::oops_do_for_all_threads(OopClosure* f) {
2380 // no-op if jvmti not enabled
2381 if (!JvmtiEnv::environments_might_exist()) {
2382 return;
2383 }
2384
2385 // Runs at safepoint. So no need to acquire Threads_lock.
2386 for (JavaThread *jthr = Threads::first(); jthr != NULL; jthr = jthr->next()) {
2387 JvmtiThreadState *state = jthr->jvmti_thread_state();
2388 if (state != NULL) {
2389 JvmtiVMObjectAllocEventCollector *collector;
2390 collector = state->get_vm_object_alloc_event_collector();
2391 while (collector != NULL) {
2392 collector->oops_do(f);
2393 collector = (JvmtiVMObjectAllocEventCollector *)collector->get_prev();
2394 }
2395 }
2396 }
2397 }
2398
2399
2400 // Disable collection of VMObjectAlloc events
2401 NoJvmtiVMObjectAllocMark::NoJvmtiVMObjectAllocMark() : _collector(NULL) {
2402 // a no-op if VMObjectAlloc event is not enabled
2403 if (!JvmtiExport::should_post_vm_object_alloc()) {
2404 return;
2405 }
2406 Thread* thread = ThreadLocalStorage::thread();
2407 if (thread != NULL && thread->is_Java_thread()) {
2408 JavaThread* current_thread = (JavaThread*)thread;
2409 JvmtiThreadState *state = current_thread->jvmti_thread_state();
2410 if (state != NULL) {
2411 JvmtiVMObjectAllocEventCollector *collector;
2412 collector = state->get_vm_object_alloc_event_collector();
2413 if (collector != NULL && collector->is_enabled()) {
2414 _collector = collector;
2415 _collector->set_enabled(false);
2416 }
2417 }
2418 }
2419 }
2420
2421 // Re-Enable collection of VMObjectAlloc events (if previously enabled)
2422 NoJvmtiVMObjectAllocMark::~NoJvmtiVMObjectAllocMark() {
2423 if (was_enabled()) {
2424 _collector->set_enabled(true);
2425 }
2426 };
2427
2428 JvmtiGCMarker::JvmtiGCMarker() {
2429 // if there aren't any JVMTI environments then nothing to do
2430 if (!JvmtiEnv::environments_might_exist()) {
2431 return;
2432 }
2433
2434 if (JvmtiExport::should_post_garbage_collection_start()) {
2435 JvmtiExport::post_garbage_collection_start();
2436 }
2437
2438 if (SafepointSynchronize::is_at_safepoint()) {
2439 // Do clean up tasks that need to be done at a safepoint
2440 JvmtiEnvBase::check_for_periodic_clean_up();
2441 }
2442 }
2443
2444 JvmtiGCMarker::~JvmtiGCMarker() {
2445 // if there aren't any JVMTI environments then nothing to do
2446 if (!JvmtiEnv::environments_might_exist()) {
2447 return;
2448 }
2449
2450 // JVMTI notify gc finish
2451 if (JvmtiExport::should_post_garbage_collection_finish()) {
2452 JvmtiExport::post_garbage_collection_finish();
2453 }
2454 }
2455 #endif // JVMTI_KERNEL