1 /*
2 * Copyright (c) 2003, 2014, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/systemDictionary.hpp"
27 #include "code/nmethod.hpp"
28 #include "code/pcDesc.hpp"
29 #include "code/scopeDesc.hpp"
30 #include "interpreter/interpreter.hpp"
31 #include "jvmtifiles/jvmtiEnv.hpp"
32 #include "memory/resourceArea.hpp"
33 #include "oops/objArrayKlass.hpp"
34 #include "oops/objArrayOop.hpp"
35 #include "prims/jvmtiCodeBlobEvents.hpp"
36 #include "prims/jvmtiEventController.hpp"
37 #include "prims/jvmtiEventController.inline.hpp"
38 #include "prims/jvmtiExport.hpp"
39 #include "prims/jvmtiImpl.hpp"
40 #include "prims/jvmtiManageCapabilities.hpp"
41 #include "prims/jvmtiRawMonitor.hpp"
42 #include "prims/jvmtiTagMap.hpp"
43 #include "prims/jvmtiThreadState.inline.hpp"
44 #include "prims/jvmtiRedefineClasses.hpp"
45 #include "runtime/arguments.hpp"
46 #include "runtime/handles.hpp"
47 #include "runtime/interfaceSupport.hpp"
48 #include "runtime/objectMonitor.hpp"
49 #include "runtime/objectMonitor.inline.hpp"
50 #include "runtime/os.inline.hpp"
51 #include "runtime/thread.inline.hpp"
52 #include "runtime/vframe.hpp"
53 #include "services/attachListener.hpp"
54 #include "services/serviceUtil.hpp"
55 #include "utilities/macros.hpp"
56 #if INCLUDE_ALL_GCS
57 #include "gc_implementation/parallelScavenge/psMarkSweep.hpp"
58 #endif // INCLUDE_ALL_GCS
59
60 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
61
62 #ifdef JVMTI_TRACE
63 #define EVT_TRACE(evt,out) if ((JvmtiTrace::event_trace_flags(evt) & JvmtiTrace::SHOW_EVENT_SENT) != 0) { SafeResourceMark rm; tty->print_cr out; }
64 #define EVT_TRIG_TRACE(evt,out) if ((JvmtiTrace::event_trace_flags(evt) & JvmtiTrace::SHOW_EVENT_TRIGGER) != 0) { SafeResourceMark rm; tty->print_cr out; }
65 #else
66 #define EVT_TRIG_TRACE(evt,out)
67 #define EVT_TRACE(evt,out)
68 #endif
69
70 ///////////////////////////////////////////////////////////////
71 //
72 // JvmtiEventTransition
73 //
74 // TO DO --
75 // more handle purging
76
77 // Use this for JavaThreads and state is _thread_in_vm.
78 class JvmtiJavaThreadEventTransition : StackObj {
79 private:
80 ResourceMark _rm;
81 ThreadToNativeFromVM _transition;
82 HandleMark _hm;
83
84 public:
85 JvmtiJavaThreadEventTransition(JavaThread *thread) :
86 _rm(),
87 _transition(thread),
88 _hm(thread) {};
89 };
90
91 // For JavaThreads which are not in _thread_in_vm state
92 // and other system threads use this.
93 class JvmtiThreadEventTransition : StackObj {
94 private:
95 ResourceMark _rm;
96 HandleMark _hm;
97 JavaThreadState _saved_state;
98 JavaThread *_jthread;
99
100 public:
101 JvmtiThreadEventTransition(Thread *thread) : _rm(), _hm() {
102 if (thread->is_Java_thread()) {
103 _jthread = (JavaThread *)thread;
104 _saved_state = _jthread->thread_state();
105 if (_saved_state == _thread_in_Java) {
106 ThreadStateTransition::transition_from_java(_jthread, _thread_in_native);
107 } else {
108 ThreadStateTransition::transition(_jthread, _saved_state, _thread_in_native);
109 }
110 } else {
111 _jthread = NULL;
112 }
113 }
114
115 ~JvmtiThreadEventTransition() {
116 if (_jthread != NULL)
117 ThreadStateTransition::transition_from_native(_jthread, _saved_state);
118 }
119 };
120
121
122 ///////////////////////////////////////////////////////////////
123 //
124 // JvmtiEventMark
125 //
126
127 class JvmtiEventMark : public StackObj {
128 private:
129 JavaThread *_thread;
130 JNIEnv* _jni_env;
131 bool _exception_detected;
132 bool _exception_caught;
133 #if 0
134 JNIHandleBlock* _hblock;
135 #endif
136
137 public:
138 JvmtiEventMark(JavaThread *thread) : _thread(thread),
139 _jni_env(thread->jni_environment()) {
140 #if 0
141 _hblock = thread->active_handles();
142 _hblock->clear_thoroughly(); // so we can be safe
143 #else
144 // we want to use the code above - but that needs the JNIHandle changes - later...
145 // for now, steal JNI push local frame code
146 JvmtiThreadState *state = thread->jvmti_thread_state();
147 // we are before an event.
148 // Save current jvmti thread exception state.
149 if (state != NULL) {
150 _exception_detected = state->is_exception_detected();
151 _exception_caught = state->is_exception_caught();
152 } else {
153 _exception_detected = false;
154 _exception_caught = false;
155 }
156
157 JNIHandleBlock* old_handles = thread->active_handles();
158 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread);
159 assert(new_handles != NULL, "should not be NULL");
160 new_handles->set_pop_frame_link(old_handles);
161 thread->set_active_handles(new_handles);
162 #endif
163 assert(thread == JavaThread::current(), "thread must be current!");
164 thread->frame_anchor()->make_walkable(thread);
165 };
166
167 ~JvmtiEventMark() {
168 #if 0
169 _hblock->clear(); // for consistency with future correct behavior
170 #else
171 // we want to use the code above - but that needs the JNIHandle changes - later...
172 // for now, steal JNI pop local frame code
173 JNIHandleBlock* old_handles = _thread->active_handles();
174 JNIHandleBlock* new_handles = old_handles->pop_frame_link();
175 assert(new_handles != NULL, "should not be NULL");
176 _thread->set_active_handles(new_handles);
177 // Note that we set the pop_frame_link to NULL explicitly, otherwise
178 // the release_block call will release the blocks.
179 old_handles->set_pop_frame_link(NULL);
180 JNIHandleBlock::release_block(old_handles, _thread); // may block
181 #endif
182
183 JvmtiThreadState* state = _thread->jvmti_thread_state();
184 // we are continuing after an event.
185 if (state != NULL) {
186 // Restore the jvmti thread exception state.
187 if (_exception_detected) {
188 state->set_exception_detected();
189 }
190 if (_exception_caught) {
191 state->set_exception_caught();
192 }
193 }
194 }
195
196 #if 0
197 jobject to_jobject(oop obj) { return obj == NULL? NULL : _hblock->allocate_handle_fast(obj); }
198 #else
199 // we want to use the code above - but that needs the JNIHandle changes - later...
200 // for now, use regular make_local
201 jobject to_jobject(oop obj) { return JNIHandles::make_local(_thread,obj); }
202 #endif
203
204 jclass to_jclass(Klass* klass) { return (klass == NULL ? NULL : (jclass)to_jobject(klass->java_mirror())); }
205
206 jmethodID to_jmethodID(methodHandle method) { return method->jmethod_id(); }
207
208 JNIEnv* jni_env() { return _jni_env; }
209 };
210
211 class JvmtiThreadEventMark : public JvmtiEventMark {
212 private:
213 jthread _jt;
214
215 public:
216 JvmtiThreadEventMark(JavaThread *thread) :
217 JvmtiEventMark(thread) {
218 _jt = (jthread)(to_jobject(thread->threadObj()));
219 };
220 jthread jni_thread() { return _jt; }
221 };
222
223 class JvmtiClassEventMark : public JvmtiThreadEventMark {
224 private:
225 jclass _jc;
226
227 public:
228 JvmtiClassEventMark(JavaThread *thread, Klass* klass) :
229 JvmtiThreadEventMark(thread) {
230 _jc = to_jclass(klass);
231 };
232 jclass jni_class() { return _jc; }
233 };
234
235 class JvmtiMethodEventMark : public JvmtiThreadEventMark {
236 private:
237 jmethodID _mid;
238
239 public:
240 JvmtiMethodEventMark(JavaThread *thread, methodHandle method) :
241 JvmtiThreadEventMark(thread),
242 _mid(to_jmethodID(method)) {};
243 jmethodID jni_methodID() { return _mid; }
244 };
245
246 class JvmtiLocationEventMark : public JvmtiMethodEventMark {
247 private:
248 jlocation _loc;
249
250 public:
251 JvmtiLocationEventMark(JavaThread *thread, methodHandle method, address location) :
252 JvmtiMethodEventMark(thread, method),
253 _loc(location - method->code_base()) {};
254 jlocation location() { return _loc; }
255 };
256
257 class JvmtiExceptionEventMark : public JvmtiLocationEventMark {
258 private:
259 jobject _exc;
260
261 public:
262 JvmtiExceptionEventMark(JavaThread *thread, methodHandle method, address location, Handle exception) :
263 JvmtiLocationEventMark(thread, method, location),
264 _exc(to_jobject(exception())) {};
265 jobject exception() { return _exc; }
266 };
267
268 class JvmtiClassFileLoadEventMark : public JvmtiThreadEventMark {
269 private:
270 const char *_class_name;
271 jobject _jloader;
272 jobject _protection_domain;
273 jclass _class_being_redefined;
274
275 public:
276 JvmtiClassFileLoadEventMark(JavaThread *thread, Symbol* name,
277 Handle class_loader, Handle prot_domain, KlassHandle *class_being_redefined) : JvmtiThreadEventMark(thread) {
278 _class_name = name != NULL? name->as_utf8() : NULL;
279 _jloader = (jobject)to_jobject(class_loader());
280 _protection_domain = (jobject)to_jobject(prot_domain());
281 if (class_being_redefined == NULL) {
282 _class_being_redefined = NULL;
283 } else {
284 _class_being_redefined = (jclass)to_jclass((*class_being_redefined)());
285 }
286 };
287 const char *class_name() {
288 return _class_name;
289 }
290 jobject jloader() {
291 return _jloader;
292 }
293 jobject protection_domain() {
294 return _protection_domain;
295 }
296 jclass class_being_redefined() {
297 return _class_being_redefined;
298 }
299 };
300
301 //////////////////////////////////////////////////////////////////////////////
302
303 int JvmtiExport::_field_access_count = 0;
304 int JvmtiExport::_field_modification_count = 0;
305
306 bool JvmtiExport::_can_access_local_variables = false;
307 bool JvmtiExport::_can_hotswap_or_post_breakpoint = false;
308 bool JvmtiExport::_can_modify_any_class = false;
309 bool JvmtiExport::_can_walk_any_space = false;
310
311 bool JvmtiExport::_has_redefined_a_class = false;
312 bool JvmtiExport::_all_dependencies_are_recorded = false;
313
314 //
315 // field access management
316 //
317
318 // interpreter generator needs the address of the counter
319 address JvmtiExport::get_field_access_count_addr() {
320 // We don't grab a lock because we don't want to
321 // serialize field access between all threads. This means that a
322 // thread on another processor can see the wrong count value and
323 // may either miss making a needed call into post_field_access()
324 // or will make an unneeded call into post_field_access(). We pay
325 // this price to avoid slowing down the VM when we aren't watching
326 // field accesses.
327 // Other access/mutation safe by virtue of being in VM state.
328 return (address)(&_field_access_count);
329 }
330
331 //
332 // field modification management
333 //
334
335 // interpreter generator needs the address of the counter
336 address JvmtiExport::get_field_modification_count_addr() {
337 // We don't grab a lock because we don't
338 // want to serialize field modification between all threads. This
339 // means that a thread on another processor can see the wrong
340 // count value and may either miss making a needed call into
341 // post_field_modification() or will make an unneeded call into
342 // post_field_modification(). We pay this price to avoid slowing
343 // down the VM when we aren't watching field modifications.
344 // Other access/mutation safe by virtue of being in VM state.
345 return (address)(&_field_modification_count);
346 }
347
348
349 ///////////////////////////////////////////////////////////////
350 // Functions needed by java.lang.instrument for starting up javaagent.
351 ///////////////////////////////////////////////////////////////
352
353 jint
354 JvmtiExport::get_jvmti_interface(JavaVM *jvm, void **penv, jint version) {
355 // The JVMTI_VERSION_INTERFACE_JVMTI part of the version number
356 // has already been validated in JNI GetEnv().
357 int major, minor, micro;
358
359 // micro version doesn't matter here (yet?)
360 decode_version_values(version, &major, &minor, µ);
361 switch (major) {
362 case 1:
363 switch (minor) {
364 case 0: // version 1.0.<micro> is recognized
365 case 1: // version 1.1.<micro> is recognized
366 case 2: // version 1.2.<micro> is recognized
367 break;
368
369 default:
370 return JNI_EVERSION; // unsupported minor version number
371 }
372 break;
373 default:
374 return JNI_EVERSION; // unsupported major version number
375 }
376
377 if (JvmtiEnv::get_phase() == JVMTI_PHASE_LIVE) {
378 JavaThread* current_thread = (JavaThread*) ThreadLocalStorage::thread();
379 // transition code: native to VM
380 ThreadInVMfromNative __tiv(current_thread);
381 VM_ENTRY_BASE(jvmtiEnv*, JvmtiExport::get_jvmti_interface, current_thread)
382 debug_only(VMNativeEntryWrapper __vew;)
383
384 JvmtiEnv *jvmti_env = JvmtiEnv::create_a_jvmti(version);
385 *penv = jvmti_env->jvmti_external(); // actual type is jvmtiEnv* -- not to be confused with JvmtiEnv*
386 return JNI_OK;
387
388 } else if (JvmtiEnv::get_phase() == JVMTI_PHASE_ONLOAD) {
389 // not live, no thread to transition
390 JvmtiEnv *jvmti_env = JvmtiEnv::create_a_jvmti(version);
391 *penv = jvmti_env->jvmti_external(); // actual type is jvmtiEnv* -- not to be confused with JvmtiEnv*
392 return JNI_OK;
393
394 } else {
395 // Called at the wrong time
396 *penv = NULL;
397 return JNI_EDETACHED;
398 }
399 }
400
401
402 void
403 JvmtiExport::decode_version_values(jint version, int * major, int * minor,
404 int * micro) {
405 *major = (version & JVMTI_VERSION_MASK_MAJOR) >> JVMTI_VERSION_SHIFT_MAJOR;
406 *minor = (version & JVMTI_VERSION_MASK_MINOR) >> JVMTI_VERSION_SHIFT_MINOR;
407 *micro = (version & JVMTI_VERSION_MASK_MICRO) >> JVMTI_VERSION_SHIFT_MICRO;
408 }
409
410 void JvmtiExport::enter_primordial_phase() {
411 JvmtiEnvBase::set_phase(JVMTI_PHASE_PRIMORDIAL);
412 }
413
414 void JvmtiExport::enter_start_phase() {
415 JvmtiManageCapabilities::recompute_always_capabilities();
416 JvmtiEnvBase::set_phase(JVMTI_PHASE_START);
417 }
418
419 void JvmtiExport::enter_onload_phase() {
420 JvmtiEnvBase::set_phase(JVMTI_PHASE_ONLOAD);
421 }
422
423 void JvmtiExport::enter_live_phase() {
424 JvmtiEnvBase::set_phase(JVMTI_PHASE_LIVE);
425 }
426
427 //
428 // JVMTI events that the VM posts to the debugger and also startup agent
429 // and call the agent's premain() for java.lang.instrument.
430 //
431
432 void JvmtiExport::post_vm_start() {
433 EVT_TRIG_TRACE(JVMTI_EVENT_VM_START, ("JVMTI Trg VM start event triggered" ));
434
435 // can now enable some events
436 JvmtiEventController::vm_start();
437
438 JvmtiEnvIterator it;
439 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
440 if (env->is_enabled(JVMTI_EVENT_VM_START)) {
441 EVT_TRACE(JVMTI_EVENT_VM_START, ("JVMTI Evt VM start event sent" ));
442
443 JavaThread *thread = JavaThread::current();
444 JvmtiThreadEventMark jem(thread);
445 JvmtiJavaThreadEventTransition jet(thread);
446 jvmtiEventVMStart callback = env->callbacks()->VMStart;
447 if (callback != NULL) {
448 (*callback)(env->jvmti_external(), jem.jni_env());
449 }
450 }
451 }
452 }
453
454
455 void JvmtiExport::post_vm_initialized() {
456 EVT_TRIG_TRACE(JVMTI_EVENT_VM_INIT, ("JVMTI Trg VM init event triggered" ));
457
458 // can now enable events
459 JvmtiEventController::vm_init();
460
461 JvmtiEnvIterator it;
462 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
463 if (env->is_enabled(JVMTI_EVENT_VM_INIT)) {
464 EVT_TRACE(JVMTI_EVENT_VM_INIT, ("JVMTI Evt VM init event sent" ));
465
466 JavaThread *thread = JavaThread::current();
467 JvmtiThreadEventMark jem(thread);
468 JvmtiJavaThreadEventTransition jet(thread);
469 jvmtiEventVMInit callback = env->callbacks()->VMInit;
470 if (callback != NULL) {
471 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread());
472 }
473 }
474 }
475 }
476
477
478 void JvmtiExport::post_vm_death() {
479 EVT_TRIG_TRACE(JVMTI_EVENT_VM_DEATH, ("JVMTI Trg VM death event triggered" ));
480
481 JvmtiEnvIterator it;
482 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
483 if (env->is_enabled(JVMTI_EVENT_VM_DEATH)) {
484 EVT_TRACE(JVMTI_EVENT_VM_DEATH, ("JVMTI Evt VM death event sent" ));
485
486 JavaThread *thread = JavaThread::current();
487 JvmtiEventMark jem(thread);
488 JvmtiJavaThreadEventTransition jet(thread);
489 jvmtiEventVMDeath callback = env->callbacks()->VMDeath;
490 if (callback != NULL) {
491 (*callback)(env->jvmti_external(), jem.jni_env());
492 }
493 }
494 }
495
496 JvmtiEnvBase::set_phase(JVMTI_PHASE_DEAD);
497 JvmtiEventController::vm_death();
498 }
499
500 char**
501 JvmtiExport::get_all_native_method_prefixes(int* count_ptr) {
502 // Have to grab JVMTI thread state lock to be sure environment doesn't
503 // go away while we iterate them. No locks during VM bring-up.
504 if (Threads::number_of_threads() == 0 || SafepointSynchronize::is_at_safepoint()) {
505 return JvmtiEnvBase::get_all_native_method_prefixes(count_ptr);
506 } else {
507 MutexLocker mu(JvmtiThreadState_lock);
508 return JvmtiEnvBase::get_all_native_method_prefixes(count_ptr);
509 }
510 }
511
512 class JvmtiClassFileLoadHookPoster : public StackObj {
513 private:
514 Symbol* _h_name;
515 Handle _class_loader;
516 Handle _h_protection_domain;
517 unsigned char ** _data_ptr;
518 unsigned char ** _end_ptr;
519 JavaThread * _thread;
520 jint _curr_len;
521 unsigned char * _curr_data;
522 JvmtiEnv * _curr_env;
523 JvmtiCachedClassFileData ** _cached_class_file_ptr;
524 JvmtiThreadState * _state;
525 KlassHandle * _h_class_being_redefined;
526 JvmtiClassLoadKind _load_kind;
527
528 public:
529 inline JvmtiClassFileLoadHookPoster(Symbol* h_name, Handle class_loader,
530 Handle h_protection_domain,
531 unsigned char **data_ptr, unsigned char **end_ptr,
532 JvmtiCachedClassFileData **cache_ptr) {
533 _h_name = h_name;
534 _class_loader = class_loader;
535 _h_protection_domain = h_protection_domain;
536 _data_ptr = data_ptr;
537 _end_ptr = end_ptr;
538 _thread = JavaThread::current();
539 _curr_len = *end_ptr - *data_ptr;
540 _curr_data = *data_ptr;
541 _curr_env = NULL;
542 _cached_class_file_ptr = cache_ptr;
543
544 _state = _thread->jvmti_thread_state();
545 if (_state != NULL) {
546 _h_class_being_redefined = _state->get_class_being_redefined();
547 _load_kind = _state->get_class_load_kind();
548 // Clear class_being_redefined flag here. The action
549 // from agent handler could generate a new class file load
550 // hook event and if it is not cleared the new event generated
551 // from regular class file load could have this stale redefined
552 // class handle info.
553 _state->clear_class_being_redefined();
554 } else {
555 // redefine and retransform will always set the thread state
556 _h_class_being_redefined = (KlassHandle *) NULL;
557 _load_kind = jvmti_class_load_kind_load;
558 }
559 }
560
561 void post() {
562 // EVT_TRIG_TRACE(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK,
563 // ("JVMTI [%s] class file load hook event triggered",
564 // JvmtiTrace::safe_get_thread_name(_thread)));
565 post_all_envs();
566 copy_modified_data();
567 }
568
569 private:
570 void post_all_envs() {
571 if (_load_kind != jvmti_class_load_kind_retransform) {
572 // for class load and redefine,
573 // call the non-retransformable agents
574 JvmtiEnvIterator it;
575 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
576 if (!env->is_retransformable() && env->is_enabled(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK)) {
577 // non-retransformable agents cannot retransform back,
578 // so no need to cache the original class file bytes
579 post_to_env(env, false);
580 }
581 }
582 }
583 JvmtiEnvIterator it;
584 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
585 // retransformable agents get all events
586 if (env->is_retransformable() && env->is_enabled(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK)) {
587 // retransformable agents need to cache the original class file
588 // bytes if changes are made via the ClassFileLoadHook
589 post_to_env(env, true);
590 }
591 }
592 }
593
594 void post_to_env(JvmtiEnv* env, bool caching_needed) {
595 unsigned char *new_data = NULL;
596 jint new_len = 0;
597 // EVT_TRACE(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK,
598 // ("JVMTI [%s] class file load hook event sent %s data_ptr = %d, data_len = %d",
599 // JvmtiTrace::safe_get_thread_name(_thread),
600 // _h_name == NULL ? "NULL" : _h_name->as_utf8(),
601 // _curr_data, _curr_len ));
602 JvmtiClassFileLoadEventMark jem(_thread, _h_name, _class_loader,
603 _h_protection_domain,
604 _h_class_being_redefined);
605 JvmtiJavaThreadEventTransition jet(_thread);
606 JNIEnv* jni_env = (JvmtiEnv::get_phase() == JVMTI_PHASE_PRIMORDIAL)?
607 NULL : jem.jni_env();
608 jvmtiEventClassFileLoadHook callback = env->callbacks()->ClassFileLoadHook;
609 if (callback != NULL) {
610 (*callback)(env->jvmti_external(), jni_env,
611 jem.class_being_redefined(),
612 jem.jloader(), jem.class_name(),
613 jem.protection_domain(),
614 _curr_len, _curr_data,
615 &new_len, &new_data);
616 }
617 if (new_data != NULL) {
618 // this agent has modified class data.
619 if (caching_needed && *_cached_class_file_ptr == NULL) {
620 // data has been changed by the new retransformable agent
621 // and it hasn't already been cached, cache it
622 JvmtiCachedClassFileData *p;
623 p = (JvmtiCachedClassFileData *)os::malloc(
624 offset_of(JvmtiCachedClassFileData, data) + _curr_len, mtInternal);
625 if (p == NULL) {
626 vm_exit_out_of_memory(offset_of(JvmtiCachedClassFileData, data) + _curr_len,
627 OOM_MALLOC_ERROR,
628 "unable to allocate cached copy of original class bytes");
629 }
630 p->length = _curr_len;
631 memcpy(p->data, _curr_data, _curr_len);
632 *_cached_class_file_ptr = p;
633 }
634
635 if (_curr_data != *_data_ptr) {
636 // curr_data is previous agent modified class data.
637 // And this has been changed by the new agent so
638 // we can delete it now.
639 _curr_env->Deallocate(_curr_data);
640 }
641
642 // Class file data has changed by the current agent.
643 _curr_data = new_data;
644 _curr_len = new_len;
645 // Save the current agent env we need this to deallocate the
646 // memory allocated by this agent.
647 _curr_env = env;
648 }
649 }
650
651 void copy_modified_data() {
652 // if one of the agent has modified class file data.
653 // Copy modified class data to new resources array.
654 if (_curr_data != *_data_ptr) {
655 *_data_ptr = NEW_RESOURCE_ARRAY(u1, _curr_len);
656 memcpy(*_data_ptr, _curr_data, _curr_len);
657 *_end_ptr = *_data_ptr + _curr_len;
658 _curr_env->Deallocate(_curr_data);
659 }
660 }
661 };
662
663 bool JvmtiExport::_should_post_class_file_load_hook = false;
664
665 // this entry is for class file load hook on class load, redefine and retransform
666 void JvmtiExport::post_class_file_load_hook(Symbol* h_name,
667 Handle class_loader,
668 Handle h_protection_domain,
669 unsigned char **data_ptr,
670 unsigned char **end_ptr,
671 JvmtiCachedClassFileData **cache_ptr) {
672 JvmtiClassFileLoadHookPoster poster(h_name, class_loader,
673 h_protection_domain,
674 data_ptr, end_ptr,
675 cache_ptr);
676 poster.post();
677 }
678
679 void JvmtiExport::report_unsupported(bool on) {
680 // If any JVMTI service is turned on, we need to exit before native code
681 // tries to access nonexistant services.
682 if (on) {
683 vm_exit_during_initialization("Java Kernel does not support JVMTI.");
684 }
685 }
686
687
688 static inline Klass* oop_to_klass(oop obj) {
689 Klass* k = obj->klass();
690
691 // if the object is a java.lang.Class then return the java mirror
692 if (k == SystemDictionary::Class_klass()) {
693 if (!java_lang_Class::is_primitive(obj)) {
694 k = java_lang_Class::as_Klass(obj);
695 assert(k != NULL, "class for non-primitive mirror must exist");
696 }
697 }
698 return k;
699 }
700
701 class JvmtiVMObjectAllocEventMark : public JvmtiClassEventMark {
702 private:
703 jobject _jobj;
704 jlong _size;
705 public:
706 JvmtiVMObjectAllocEventMark(JavaThread *thread, oop obj) : JvmtiClassEventMark(thread, oop_to_klass(obj)) {
707 _jobj = (jobject)to_jobject(obj);
708 _size = obj->size() * wordSize;
709 };
710 jobject jni_jobject() { return _jobj; }
711 jlong size() { return _size; }
712 };
713
714 class JvmtiCompiledMethodLoadEventMark : public JvmtiMethodEventMark {
715 private:
716 jint _code_size;
717 const void *_code_data;
718 jint _map_length;
719 jvmtiAddrLocationMap *_map;
720 const void *_compile_info;
721 public:
722 JvmtiCompiledMethodLoadEventMark(JavaThread *thread, nmethod *nm, void* compile_info_ptr = NULL)
723 : JvmtiMethodEventMark(thread,methodHandle(thread, nm->method())) {
724 _code_data = nm->insts_begin();
725 _code_size = nm->insts_size();
726 _compile_info = compile_info_ptr; // Set void pointer of compiledMethodLoad Event. Default value is NULL.
727 JvmtiCodeBlobEvents::build_jvmti_addr_location_map(nm, &_map, &_map_length);
728 }
729 ~JvmtiCompiledMethodLoadEventMark() {
730 FREE_C_HEAP_ARRAY(jvmtiAddrLocationMap, _map);
731 }
732
733 jint code_size() { return _code_size; }
734 const void *code_data() { return _code_data; }
735 jint map_length() { return _map_length; }
736 const jvmtiAddrLocationMap* map() { return _map; }
737 const void *compile_info() { return _compile_info; }
738 };
739
740
741
742 class JvmtiMonitorEventMark : public JvmtiThreadEventMark {
743 private:
744 jobject _jobj;
745 public:
746 JvmtiMonitorEventMark(JavaThread *thread, oop object)
747 : JvmtiThreadEventMark(thread){
748 _jobj = to_jobject(object);
749 }
750 jobject jni_object() { return _jobj; }
751 };
752
753 ///////////////////////////////////////////////////////////////
754 //
755 // pending CompiledMethodUnload support
756 //
757
758 void JvmtiExport::post_compiled_method_unload(
759 jmethodID method, const void *code_begin) {
760 JavaThread* thread = JavaThread::current();
761 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_UNLOAD,
762 ("JVMTI [%s] method compile unload event triggered",
763 JvmtiTrace::safe_get_thread_name(thread)));
764
765 // post the event for each environment that has this event enabled.
766 JvmtiEnvIterator it;
767 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
768 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_UNLOAD)) {
769
770 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_UNLOAD,
771 ("JVMTI [%s] class compile method unload event sent jmethodID " PTR_FORMAT,
772 JvmtiTrace::safe_get_thread_name(thread), method));
773
774 ResourceMark rm(thread);
775
776 JvmtiEventMark jem(thread);
777 JvmtiJavaThreadEventTransition jet(thread);
778 jvmtiEventCompiledMethodUnload callback = env->callbacks()->CompiledMethodUnload;
779 if (callback != NULL) {
780 (*callback)(env->jvmti_external(), method, code_begin);
781 }
782 }
783 }
784 }
785
786 ///////////////////////////////////////////////////////////////
787 //
788 // JvmtiExport
789 //
790
791 void JvmtiExport::post_raw_breakpoint(JavaThread *thread, Method* method, address location) {
792 HandleMark hm(thread);
793 methodHandle mh(thread, method);
794
795 JvmtiThreadState *state = thread->jvmti_thread_state();
796 if (state == NULL) {
797 return;
798 }
799 EVT_TRIG_TRACE(JVMTI_EVENT_BREAKPOINT, ("JVMTI [%s] Trg Breakpoint triggered",
800 JvmtiTrace::safe_get_thread_name(thread)));
801 JvmtiEnvThreadStateIterator it(state);
802 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
803 ets->compare_and_set_current_location(mh(), location, JVMTI_EVENT_BREAKPOINT);
804 if (!ets->breakpoint_posted() && ets->is_enabled(JVMTI_EVENT_BREAKPOINT)) {
805 ThreadState old_os_state = thread->osthread()->get_state();
806 thread->osthread()->set_state(BREAKPOINTED);
807 EVT_TRACE(JVMTI_EVENT_BREAKPOINT, ("JVMTI [%s] Evt Breakpoint sent %s.%s @ %d",
808 JvmtiTrace::safe_get_thread_name(thread),
809 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
810 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
811 location - mh()->code_base() ));
812
813 JvmtiEnv *env = ets->get_env();
814 JvmtiLocationEventMark jem(thread, mh, location);
815 JvmtiJavaThreadEventTransition jet(thread);
816 jvmtiEventBreakpoint callback = env->callbacks()->Breakpoint;
817 if (callback != NULL) {
818 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
819 jem.jni_methodID(), jem.location());
820 }
821
822 ets->set_breakpoint_posted();
823 thread->osthread()->set_state(old_os_state);
824 }
825 }
826 }
827
828 //////////////////////////////////////////////////////////////////////////////
829
830 bool JvmtiExport::_can_get_source_debug_extension = false;
831 bool JvmtiExport::_can_maintain_original_method_order = false;
832 bool JvmtiExport::_can_post_interpreter_events = false;
833 bool JvmtiExport::_can_post_on_exceptions = false;
834 bool JvmtiExport::_can_post_breakpoint = false;
835 bool JvmtiExport::_can_post_field_access = false;
836 bool JvmtiExport::_can_post_field_modification = false;
837 bool JvmtiExport::_can_post_method_entry = false;
838 bool JvmtiExport::_can_post_method_exit = false;
839 bool JvmtiExport::_can_pop_frame = false;
840 bool JvmtiExport::_can_force_early_return = false;
841
842 bool JvmtiExport::_should_post_single_step = false;
843 bool JvmtiExport::_should_post_field_access = false;
844 bool JvmtiExport::_should_post_field_modification = false;
845 bool JvmtiExport::_should_post_class_load = false;
846 bool JvmtiExport::_should_post_class_prepare = false;
847 bool JvmtiExport::_should_post_class_unload = false;
848 bool JvmtiExport::_should_post_thread_life = false;
849 bool JvmtiExport::_should_clean_up_heap_objects = false;
850 bool JvmtiExport::_should_post_native_method_bind = false;
851 bool JvmtiExport::_should_post_dynamic_code_generated = false;
852 bool JvmtiExport::_should_post_data_dump = false;
853 bool JvmtiExport::_should_post_compiled_method_load = false;
854 bool JvmtiExport::_should_post_compiled_method_unload = false;
855 bool JvmtiExport::_should_post_monitor_contended_enter = false;
856 bool JvmtiExport::_should_post_monitor_contended_entered = false;
857 bool JvmtiExport::_should_post_monitor_wait = false;
858 bool JvmtiExport::_should_post_monitor_waited = false;
859 bool JvmtiExport::_should_post_garbage_collection_start = false;
860 bool JvmtiExport::_should_post_garbage_collection_finish = false;
861 bool JvmtiExport::_should_post_object_free = false;
862 bool JvmtiExport::_should_post_resource_exhausted = false;
863 bool JvmtiExport::_should_post_vm_object_alloc = false;
864 bool JvmtiExport::_should_post_on_exceptions = false;
865
866 ////////////////////////////////////////////////////////////////////////////////////////////////
867
868
869 //
870 // JVMTI single step management
871 //
872 void JvmtiExport::at_single_stepping_point(JavaThread *thread, Method* method, address location) {
873 assert(JvmtiExport::should_post_single_step(), "must be single stepping");
874
875 HandleMark hm(thread);
876 methodHandle mh(thread, method);
877
878 // update information about current location and post a step event
879 JvmtiThreadState *state = thread->jvmti_thread_state();
880 if (state == NULL) {
881 return;
882 }
883 EVT_TRIG_TRACE(JVMTI_EVENT_SINGLE_STEP, ("JVMTI [%s] Trg Single Step triggered",
884 JvmtiTrace::safe_get_thread_name(thread)));
885 if (!state->hide_single_stepping()) {
886 if (state->is_pending_step_for_popframe()) {
887 state->process_pending_step_for_popframe();
888 }
889 if (state->is_pending_step_for_earlyret()) {
890 state->process_pending_step_for_earlyret();
891 }
892 JvmtiExport::post_single_step(thread, mh(), location);
893 }
894 }
895
896
897 void JvmtiExport::expose_single_stepping(JavaThread *thread) {
898 JvmtiThreadState *state = thread->jvmti_thread_state();
899 if (state != NULL) {
900 state->clear_hide_single_stepping();
901 }
902 }
903
904
905 bool JvmtiExport::hide_single_stepping(JavaThread *thread) {
906 JvmtiThreadState *state = thread->jvmti_thread_state();
907 if (state != NULL && state->is_enabled(JVMTI_EVENT_SINGLE_STEP)) {
908 state->set_hide_single_stepping();
909 return true;
910 } else {
911 return false;
912 }
913 }
914
915 void JvmtiExport::post_class_load(JavaThread *thread, Klass* klass) {
916 HandleMark hm(thread);
917 KlassHandle kh(thread, klass);
918
919 EVT_TRIG_TRACE(JVMTI_EVENT_CLASS_LOAD, ("JVMTI [%s] Trg Class Load triggered",
920 JvmtiTrace::safe_get_thread_name(thread)));
921 JvmtiThreadState* state = thread->jvmti_thread_state();
922 if (state == NULL) {
923 return;
924 }
925 JvmtiEnvThreadStateIterator it(state);
926 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
927 if (ets->is_enabled(JVMTI_EVENT_CLASS_LOAD)) {
928 EVT_TRACE(JVMTI_EVENT_CLASS_LOAD, ("JVMTI [%s] Evt Class Load sent %s",
929 JvmtiTrace::safe_get_thread_name(thread),
930 kh()==NULL? "NULL" : kh()->external_name() ));
931
932 JvmtiEnv *env = ets->get_env();
933 JvmtiClassEventMark jem(thread, kh());
934 JvmtiJavaThreadEventTransition jet(thread);
935 jvmtiEventClassLoad callback = env->callbacks()->ClassLoad;
936 if (callback != NULL) {
937 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_class());
938 }
939 }
940 }
941 }
942
943
944 void JvmtiExport::post_class_prepare(JavaThread *thread, Klass* klass) {
945 HandleMark hm(thread);
946 KlassHandle kh(thread, klass);
947
948 EVT_TRIG_TRACE(JVMTI_EVENT_CLASS_PREPARE, ("JVMTI [%s] Trg Class Prepare triggered",
949 JvmtiTrace::safe_get_thread_name(thread)));
950 JvmtiThreadState* state = thread->jvmti_thread_state();
951 if (state == NULL) {
952 return;
953 }
954 JvmtiEnvThreadStateIterator it(state);
955 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
956 if (ets->is_enabled(JVMTI_EVENT_CLASS_PREPARE)) {
957 EVT_TRACE(JVMTI_EVENT_CLASS_PREPARE, ("JVMTI [%s] Evt Class Prepare sent %s",
958 JvmtiTrace::safe_get_thread_name(thread),
959 kh()==NULL? "NULL" : kh()->external_name() ));
960
961 JvmtiEnv *env = ets->get_env();
962 JvmtiClassEventMark jem(thread, kh());
963 JvmtiJavaThreadEventTransition jet(thread);
964 jvmtiEventClassPrepare callback = env->callbacks()->ClassPrepare;
965 if (callback != NULL) {
966 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_class());
967 }
968 }
969 }
970 }
971
972 void JvmtiExport::post_class_unload(Klass* klass) {
973 Thread *thread = Thread::current();
974 HandleMark hm(thread);
975 KlassHandle kh(thread, klass);
976
977 EVT_TRIG_TRACE(EXT_EVENT_CLASS_UNLOAD, ("JVMTI [?] Trg Class Unload triggered" ));
978 if (JvmtiEventController::is_enabled((jvmtiEvent)EXT_EVENT_CLASS_UNLOAD)) {
979 assert(thread->is_VM_thread(), "wrong thread");
980
981 // get JavaThread for whom we are proxy
982 JavaThread *real_thread =
983 (JavaThread *)((VMThread *)thread)->vm_operation()->calling_thread();
984
985 JvmtiEnvIterator it;
986 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
987 if (env->is_enabled((jvmtiEvent)EXT_EVENT_CLASS_UNLOAD)) {
988 EVT_TRACE(EXT_EVENT_CLASS_UNLOAD, ("JVMTI [?] Evt Class Unload sent %s",
989 kh()==NULL? "NULL" : kh()->external_name() ));
990
991 // do everything manually, since this is a proxy - needs special care
992 JNIEnv* jni_env = real_thread->jni_environment();
993 jthread jt = (jthread)JNIHandles::make_local(real_thread, real_thread->threadObj());
994 jclass jk = (jclass)JNIHandles::make_local(real_thread, kh()->java_mirror());
995
996 // Before we call the JVMTI agent, we have to set the state in the
997 // thread for which we are proxying.
998 JavaThreadState prev_state = real_thread->thread_state();
999 assert(((Thread *)real_thread)->is_ConcurrentGC_thread() ||
1000 (real_thread->is_Java_thread() && prev_state == _thread_blocked),
1001 "should be ConcurrentGCThread or JavaThread at safepoint");
1002 real_thread->set_thread_state(_thread_in_native);
1003
1004 jvmtiExtensionEvent callback = env->ext_callbacks()->ClassUnload;
1005 if (callback != NULL) {
1006 (*callback)(env->jvmti_external(), jni_env, jt, jk);
1007 }
1008
1009 assert(real_thread->thread_state() == _thread_in_native,
1010 "JavaThread should be in native");
1011 real_thread->set_thread_state(prev_state);
1012
1013 JNIHandles::destroy_local(jk);
1014 JNIHandles::destroy_local(jt);
1015 }
1016 }
1017 }
1018 }
1019
1020
1021 void JvmtiExport::post_thread_start(JavaThread *thread) {
1022 assert(thread->thread_state() == _thread_in_vm, "must be in vm state");
1023
1024 EVT_TRIG_TRACE(JVMTI_EVENT_THREAD_START, ("JVMTI [%s] Trg Thread Start event triggered",
1025 JvmtiTrace::safe_get_thread_name(thread)));
1026
1027 // do JVMTI thread initialization (if needed)
1028 JvmtiEventController::thread_started(thread);
1029
1030 // Do not post thread start event for hidden java thread.
1031 if (JvmtiEventController::is_enabled(JVMTI_EVENT_THREAD_START) &&
1032 !thread->is_hidden_from_external_view()) {
1033 JvmtiEnvIterator it;
1034 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1035 if (env->is_enabled(JVMTI_EVENT_THREAD_START)) {
1036 EVT_TRACE(JVMTI_EVENT_THREAD_START, ("JVMTI [%s] Evt Thread Start event sent",
1037 JvmtiTrace::safe_get_thread_name(thread) ));
1038
1039 JvmtiThreadEventMark jem(thread);
1040 JvmtiJavaThreadEventTransition jet(thread);
1041 jvmtiEventThreadStart callback = env->callbacks()->ThreadStart;
1042 if (callback != NULL) {
1043 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread());
1044 }
1045 }
1046 }
1047 }
1048 }
1049
1050
1051 void JvmtiExport::post_thread_end(JavaThread *thread) {
1052 EVT_TRIG_TRACE(JVMTI_EVENT_THREAD_END, ("JVMTI [%s] Trg Thread End event triggered",
1053 JvmtiTrace::safe_get_thread_name(thread)));
1054
1055 JvmtiThreadState *state = thread->jvmti_thread_state();
1056 if (state == NULL) {
1057 return;
1058 }
1059
1060 // Do not post thread end event for hidden java thread.
1061 if (state->is_enabled(JVMTI_EVENT_THREAD_END) &&
1062 !thread->is_hidden_from_external_view()) {
1063
1064 JvmtiEnvThreadStateIterator it(state);
1065 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1066 if (ets->is_enabled(JVMTI_EVENT_THREAD_END)) {
1067 EVT_TRACE(JVMTI_EVENT_THREAD_END, ("JVMTI [%s] Evt Thread End event sent",
1068 JvmtiTrace::safe_get_thread_name(thread) ));
1069
1070 JvmtiEnv *env = ets->get_env();
1071 JvmtiThreadEventMark jem(thread);
1072 JvmtiJavaThreadEventTransition jet(thread);
1073 jvmtiEventThreadEnd callback = env->callbacks()->ThreadEnd;
1074 if (callback != NULL) {
1075 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread());
1076 }
1077 }
1078 }
1079 }
1080 }
1081
1082 void JvmtiExport::post_object_free(JvmtiEnv* env, jlong tag) {
1083 assert(SafepointSynchronize::is_at_safepoint(), "must be executed at safepoint");
1084 assert(env->is_enabled(JVMTI_EVENT_OBJECT_FREE), "checking");
1085
1086 EVT_TRIG_TRACE(JVMTI_EVENT_OBJECT_FREE, ("JVMTI [?] Trg Object Free triggered" ));
1087 EVT_TRACE(JVMTI_EVENT_OBJECT_FREE, ("JVMTI [?] Evt Object Free sent"));
1088
1089 jvmtiEventObjectFree callback = env->callbacks()->ObjectFree;
1090 if (callback != NULL) {
1091 (*callback)(env->jvmti_external(), tag);
1092 }
1093 }
1094
1095 void JvmtiExport::post_resource_exhausted(jint resource_exhausted_flags, const char* description) {
1096 EVT_TRIG_TRACE(JVMTI_EVENT_RESOURCE_EXHAUSTED, ("JVMTI Trg resource exhausted event triggered" ));
1097
1098 JvmtiEnvIterator it;
1099 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1100 if (env->is_enabled(JVMTI_EVENT_RESOURCE_EXHAUSTED)) {
1101 EVT_TRACE(JVMTI_EVENT_RESOURCE_EXHAUSTED, ("JVMTI Evt resource exhausted event sent" ));
1102
1103 JavaThread *thread = JavaThread::current();
1104 JvmtiThreadEventMark jem(thread);
1105 JvmtiJavaThreadEventTransition jet(thread);
1106 jvmtiEventResourceExhausted callback = env->callbacks()->ResourceExhausted;
1107 if (callback != NULL) {
1108 (*callback)(env->jvmti_external(), jem.jni_env(),
1109 resource_exhausted_flags, NULL, description);
1110 }
1111 }
1112 }
1113 }
1114
1115 void JvmtiExport::post_method_entry(JavaThread *thread, Method* method, frame current_frame) {
1116 HandleMark hm(thread);
1117 methodHandle mh(thread, method);
1118
1119 EVT_TRIG_TRACE(JVMTI_EVENT_METHOD_ENTRY, ("JVMTI [%s] Trg Method Entry triggered %s.%s",
1120 JvmtiTrace::safe_get_thread_name(thread),
1121 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1122 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1123
1124 JvmtiThreadState* state = thread->jvmti_thread_state();
1125 if (state == NULL || !state->is_interp_only_mode()) {
1126 // for any thread that actually wants method entry, interp_only_mode is set
1127 return;
1128 }
1129
1130 state->incr_cur_stack_depth();
1131
1132 if (state->is_enabled(JVMTI_EVENT_METHOD_ENTRY)) {
1133 JvmtiEnvThreadStateIterator it(state);
1134 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1135 if (ets->is_enabled(JVMTI_EVENT_METHOD_ENTRY)) {
1136 EVT_TRACE(JVMTI_EVENT_METHOD_ENTRY, ("JVMTI [%s] Evt Method Entry sent %s.%s",
1137 JvmtiTrace::safe_get_thread_name(thread),
1138 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1139 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1140
1141 JvmtiEnv *env = ets->get_env();
1142 JvmtiMethodEventMark jem(thread, mh);
1143 JvmtiJavaThreadEventTransition jet(thread);
1144 jvmtiEventMethodEntry callback = env->callbacks()->MethodEntry;
1145 if (callback != NULL) {
1146 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_methodID());
1147 }
1148 }
1149 }
1150 }
1151 }
1152
1153 void JvmtiExport::post_method_exit(JavaThread *thread, Method* method, frame current_frame) {
1154 HandleMark hm(thread);
1155 methodHandle mh(thread, method);
1156
1157 EVT_TRIG_TRACE(JVMTI_EVENT_METHOD_EXIT, ("JVMTI [%s] Trg Method Exit triggered %s.%s",
1158 JvmtiTrace::safe_get_thread_name(thread),
1159 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1160 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1161
1162 JvmtiThreadState *state = thread->jvmti_thread_state();
1163 if (state == NULL || !state->is_interp_only_mode()) {
1164 // for any thread that actually wants method exit, interp_only_mode is set
1165 return;
1166 }
1167
1168 // return a flag when a method terminates by throwing an exception
1169 // i.e. if an exception is thrown and it's not caught by the current method
1170 bool exception_exit = state->is_exception_detected() && !state->is_exception_caught();
1171
1172
1173 if (state->is_enabled(JVMTI_EVENT_METHOD_EXIT)) {
1174 Handle result;
1175 jvalue value;
1176 value.j = 0L;
1177
1178 // if the method hasn't been popped because of an exception then we populate
1179 // the return_value parameter for the callback. At this point we only have
1180 // the address of a "raw result" and we just call into the interpreter to
1181 // convert this into a jvalue.
1182 if (!exception_exit) {
1183 oop oop_result;
1184 BasicType type = current_frame.interpreter_frame_result(&oop_result, &value);
1185 if (type == T_OBJECT || type == T_ARRAY) {
1186 result = Handle(thread, oop_result);
1187 }
1188 }
1189
1190 JvmtiEnvThreadStateIterator it(state);
1191 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1192 if (ets->is_enabled(JVMTI_EVENT_METHOD_EXIT)) {
1193 EVT_TRACE(JVMTI_EVENT_METHOD_EXIT, ("JVMTI [%s] Evt Method Exit sent %s.%s",
1194 JvmtiTrace::safe_get_thread_name(thread),
1195 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1196 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1197
1198 JvmtiEnv *env = ets->get_env();
1199 JvmtiMethodEventMark jem(thread, mh);
1200 if (result.not_null()) {
1201 value.l = JNIHandles::make_local(thread, result());
1202 }
1203 JvmtiJavaThreadEventTransition jet(thread);
1204 jvmtiEventMethodExit callback = env->callbacks()->MethodExit;
1205 if (callback != NULL) {
1206 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1207 jem.jni_methodID(), exception_exit, value);
1208 }
1209 }
1210 }
1211 }
1212
1213 if (state->is_enabled(JVMTI_EVENT_FRAME_POP)) {
1214 JvmtiEnvThreadStateIterator it(state);
1215 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1216 int cur_frame_number = state->cur_stack_depth();
1217
1218 if (ets->is_frame_pop(cur_frame_number)) {
1219 // we have a NotifyFramePop entry for this frame.
1220 // now check that this env/thread wants this event
1221 if (ets->is_enabled(JVMTI_EVENT_FRAME_POP)) {
1222 EVT_TRACE(JVMTI_EVENT_FRAME_POP, ("JVMTI [%s] Evt Frame Pop sent %s.%s",
1223 JvmtiTrace::safe_get_thread_name(thread),
1224 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1225 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1226
1227 // we also need to issue a frame pop event for this frame
1228 JvmtiEnv *env = ets->get_env();
1229 JvmtiMethodEventMark jem(thread, mh);
1230 JvmtiJavaThreadEventTransition jet(thread);
1231 jvmtiEventFramePop callback = env->callbacks()->FramePop;
1232 if (callback != NULL) {
1233 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1234 jem.jni_methodID(), exception_exit);
1235 }
1236 }
1237 // remove the frame's entry
1238 ets->clear_frame_pop(cur_frame_number);
1239 }
1240 }
1241 }
1242
1243 state->decr_cur_stack_depth();
1244 }
1245
1246
1247 // Todo: inline this for optimization
1248 void JvmtiExport::post_single_step(JavaThread *thread, Method* method, address location) {
1249 HandleMark hm(thread);
1250 methodHandle mh(thread, method);
1251
1252 JvmtiThreadState *state = thread->jvmti_thread_state();
1253 if (state == NULL) {
1254 return;
1255 }
1256 JvmtiEnvThreadStateIterator it(state);
1257 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1258 ets->compare_and_set_current_location(mh(), location, JVMTI_EVENT_SINGLE_STEP);
1259 if (!ets->single_stepping_posted() && ets->is_enabled(JVMTI_EVENT_SINGLE_STEP)) {
1260 EVT_TRACE(JVMTI_EVENT_SINGLE_STEP, ("JVMTI [%s] Evt Single Step sent %s.%s @ %d",
1261 JvmtiTrace::safe_get_thread_name(thread),
1262 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1263 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1264 location - mh()->code_base() ));
1265
1266 JvmtiEnv *env = ets->get_env();
1267 JvmtiLocationEventMark jem(thread, mh, location);
1268 JvmtiJavaThreadEventTransition jet(thread);
1269 jvmtiEventSingleStep callback = env->callbacks()->SingleStep;
1270 if (callback != NULL) {
1271 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1272 jem.jni_methodID(), jem.location());
1273 }
1274
1275 ets->set_single_stepping_posted();
1276 }
1277 }
1278 }
1279
1280
1281 void JvmtiExport::post_exception_throw(JavaThread *thread, Method* method, address location, oop exception) {
1282 HandleMark hm(thread);
1283 methodHandle mh(thread, method);
1284 Handle exception_handle(thread, exception);
1285
1286 JvmtiThreadState *state = thread->jvmti_thread_state();
1287 if (state == NULL) {
1288 return;
1289 }
1290
1291 EVT_TRIG_TRACE(JVMTI_EVENT_EXCEPTION, ("JVMTI [%s] Trg Exception thrown triggered",
1292 JvmtiTrace::safe_get_thread_name(thread)));
1293 if (!state->is_exception_detected()) {
1294 state->set_exception_detected();
1295 JvmtiEnvThreadStateIterator it(state);
1296 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1297 if (ets->is_enabled(JVMTI_EVENT_EXCEPTION) && (exception != NULL)) {
1298
1299 EVT_TRACE(JVMTI_EVENT_EXCEPTION,
1300 ("JVMTI [%s] Evt Exception thrown sent %s.%s @ %d",
1301 JvmtiTrace::safe_get_thread_name(thread),
1302 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1303 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1304 location - mh()->code_base() ));
1305
1306 JvmtiEnv *env = ets->get_env();
1307 JvmtiExceptionEventMark jem(thread, mh, location, exception_handle);
1308
1309 // It's okay to clear these exceptions here because we duplicate
1310 // this lookup in InterpreterRuntime::exception_handler_for_exception.
1311 EXCEPTION_MARK;
1312
1313 bool should_repeat;
1314 vframeStream st(thread);
1315 assert(!st.at_end(), "cannot be at end");
1316 Method* current_method = NULL;
1317 // A GC may occur during the Method::fast_exception_handler_bci_for()
1318 // call below if it needs to load the constraint class. Using a
1319 // methodHandle to keep the 'current_method' from being deallocated
1320 // if GC happens.
1321 methodHandle current_mh = methodHandle(thread, current_method);
1322 int current_bci = -1;
1323 do {
1324 current_method = st.method();
1325 current_mh = methodHandle(thread, current_method);
1326 current_bci = st.bci();
1327 do {
1328 should_repeat = false;
1329 KlassHandle eh_klass(thread, exception_handle()->klass());
1330 current_bci = Method::fast_exception_handler_bci_for(
1331 current_mh, eh_klass, current_bci, THREAD);
1332 if (HAS_PENDING_EXCEPTION) {
1333 exception_handle = Handle(thread, PENDING_EXCEPTION);
1334 CLEAR_PENDING_EXCEPTION;
1335 should_repeat = true;
1336 }
1337 } while (should_repeat && (current_bci != -1));
1338 st.next();
1339 } while ((current_bci < 0) && (!st.at_end()));
1340
1341 jmethodID catch_jmethodID;
1342 if (current_bci < 0) {
1343 catch_jmethodID = 0;
1344 current_bci = 0;
1345 } else {
1346 catch_jmethodID = jem.to_jmethodID(current_mh);
1347 }
1348
1349 JvmtiJavaThreadEventTransition jet(thread);
1350 jvmtiEventException callback = env->callbacks()->Exception;
1351 if (callback != NULL) {
1352 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1353 jem.jni_methodID(), jem.location(),
1354 jem.exception(),
1355 catch_jmethodID, current_bci);
1356 }
1357 }
1358 }
1359 }
1360
1361 // frames may get popped because of this throw, be safe - invalidate cached depth
1362 state->invalidate_cur_stack_depth();
1363 }
1364
1365
1366 void JvmtiExport::notice_unwind_due_to_exception(JavaThread *thread, Method* method, address location, oop exception, bool in_handler_frame) {
1367 HandleMark hm(thread);
1368 methodHandle mh(thread, method);
1369 Handle exception_handle(thread, exception);
1370
1371 JvmtiThreadState *state = thread->jvmti_thread_state();
1372 if (state == NULL) {
1373 return;
1374 }
1375 EVT_TRIG_TRACE(JVMTI_EVENT_EXCEPTION_CATCH,
1376 ("JVMTI [%s] Trg unwind_due_to_exception triggered %s.%s @ %s%d - %s",
1377 JvmtiTrace::safe_get_thread_name(thread),
1378 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1379 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1380 location==0? "no location:" : "",
1381 location==0? 0 : location - mh()->code_base(),
1382 in_handler_frame? "in handler frame" : "not handler frame" ));
1383
1384 if (state->is_exception_detected()) {
1385
1386 state->invalidate_cur_stack_depth();
1387 if (!in_handler_frame) {
1388 // Not in exception handler.
1389 if(state->is_interp_only_mode()) {
1390 // method exit and frame pop events are posted only in interp mode.
1391 // When these events are enabled code should be in running in interp mode.
1392 JvmtiExport::post_method_exit(thread, method, thread->last_frame());
1393 // The cached cur_stack_depth might have changed from the
1394 // operations of frame pop or method exit. We are not 100% sure
1395 // the cached cur_stack_depth is still valid depth so invalidate
1396 // it.
1397 state->invalidate_cur_stack_depth();
1398 }
1399 } else {
1400 // In exception handler frame. Report exception catch.
1401 assert(location != NULL, "must be a known location");
1402 // Update cur_stack_depth - the frames above the current frame
1403 // have been unwound due to this exception:
1404 assert(!state->is_exception_caught(), "exception must not be caught yet.");
1405 state->set_exception_caught();
1406
1407 JvmtiEnvThreadStateIterator it(state);
1408 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1409 if (ets->is_enabled(JVMTI_EVENT_EXCEPTION_CATCH) && (exception_handle() != NULL)) {
1410 EVT_TRACE(JVMTI_EVENT_EXCEPTION_CATCH,
1411 ("JVMTI [%s] Evt ExceptionCatch sent %s.%s @ %d",
1412 JvmtiTrace::safe_get_thread_name(thread),
1413 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1414 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1415 location - mh()->code_base() ));
1416
1417 JvmtiEnv *env = ets->get_env();
1418 JvmtiExceptionEventMark jem(thread, mh, location, exception_handle);
1419 JvmtiJavaThreadEventTransition jet(thread);
1420 jvmtiEventExceptionCatch callback = env->callbacks()->ExceptionCatch;
1421 if (callback != NULL) {
1422 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1423 jem.jni_methodID(), jem.location(),
1424 jem.exception());
1425 }
1426 }
1427 }
1428 }
1429 }
1430 }
1431
1432 oop JvmtiExport::jni_GetField_probe(JavaThread *thread, jobject jobj, oop obj,
1433 Klass* klass, jfieldID fieldID, bool is_static) {
1434 if (*((int *)get_field_access_count_addr()) > 0 && thread->has_last_Java_frame()) {
1435 // At least one field access watch is set so we have more work
1436 // to do. This wrapper is used by entry points that allow us
1437 // to create handles in post_field_access_by_jni().
1438 post_field_access_by_jni(thread, obj, klass, fieldID, is_static);
1439 // event posting can block so refetch oop if we were passed a jobj
1440 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj);
1441 }
1442 return obj;
1443 }
1444
1445 oop JvmtiExport::jni_GetField_probe_nh(JavaThread *thread, jobject jobj, oop obj,
1446 Klass* klass, jfieldID fieldID, bool is_static) {
1447 if (*((int *)get_field_access_count_addr()) > 0 && thread->has_last_Java_frame()) {
1448 // At least one field access watch is set so we have more work
1449 // to do. This wrapper is used by "quick" entry points that don't
1450 // allow us to create handles in post_field_access_by_jni(). We
1451 // override that with a ResetNoHandleMark.
1452 ResetNoHandleMark rnhm;
1453 post_field_access_by_jni(thread, obj, klass, fieldID, is_static);
1454 // event posting can block so refetch oop if we were passed a jobj
1455 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj);
1456 }
1457 return obj;
1458 }
1459
1460 void JvmtiExport::post_field_access_by_jni(JavaThread *thread, oop obj,
1461 Klass* klass, jfieldID fieldID, bool is_static) {
1462 // We must be called with a Java context in order to provide reasonable
1463 // values for the klazz, method, and location fields. The callers of this
1464 // function don't make the call unless there is a Java context.
1465 assert(thread->has_last_Java_frame(), "must be called with a Java context");
1466
1467 ResourceMark rm;
1468 fieldDescriptor fd;
1469 // if get_field_descriptor finds fieldID to be invalid, then we just bail
1470 bool valid_fieldID = JvmtiEnv::get_field_descriptor(klass, fieldID, &fd);
1471 assert(valid_fieldID == true,"post_field_access_by_jni called with invalid fieldID");
1472 if (!valid_fieldID) return;
1473 // field accesses are not watched so bail
1474 if (!fd.is_field_access_watched()) return;
1475
1476 HandleMark hm(thread);
1477 KlassHandle h_klass(thread, klass);
1478 Handle h_obj;
1479 if (!is_static) {
1480 // non-static field accessors have an object, but we need a handle
1481 assert(obj != NULL, "non-static needs an object");
1482 h_obj = Handle(thread, obj);
1483 }
1484 post_field_access(thread,
1485 thread->last_frame().interpreter_frame_method(),
1486 thread->last_frame().interpreter_frame_bcp(),
1487 h_klass, h_obj, fieldID);
1488 }
1489
1490 void JvmtiExport::post_field_access(JavaThread *thread, Method* method,
1491 address location, KlassHandle field_klass, Handle object, jfieldID field) {
1492
1493 HandleMark hm(thread);
1494 methodHandle mh(thread, method);
1495
1496 JvmtiThreadState *state = thread->jvmti_thread_state();
1497 if (state == NULL) {
1498 return;
1499 }
1500 EVT_TRIG_TRACE(JVMTI_EVENT_FIELD_ACCESS, ("JVMTI [%s] Trg Field Access event triggered",
1501 JvmtiTrace::safe_get_thread_name(thread)));
1502 JvmtiEnvThreadStateIterator it(state);
1503 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1504 if (ets->is_enabled(JVMTI_EVENT_FIELD_ACCESS)) {
1505 EVT_TRACE(JVMTI_EVENT_FIELD_ACCESS, ("JVMTI [%s] Evt Field Access event sent %s.%s @ %d",
1506 JvmtiTrace::safe_get_thread_name(thread),
1507 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1508 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1509 location - mh()->code_base() ));
1510
1511 JvmtiEnv *env = ets->get_env();
1512 JvmtiLocationEventMark jem(thread, mh, location);
1513 jclass field_jclass = jem.to_jclass(field_klass());
1514 jobject field_jobject = jem.to_jobject(object());
1515 JvmtiJavaThreadEventTransition jet(thread);
1516 jvmtiEventFieldAccess callback = env->callbacks()->FieldAccess;
1517 if (callback != NULL) {
1518 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1519 jem.jni_methodID(), jem.location(),
1520 field_jclass, field_jobject, field);
1521 }
1522 }
1523 }
1524 }
1525
1526 oop JvmtiExport::jni_SetField_probe(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 entry points that allow us
1532 // to create handles in post_field_modification_by_jni().
1533 post_field_modification_by_jni(thread, obj, klass, fieldID, is_static, sig_type, value);
1534 // event posting can block so refetch oop if we were passed a jobj
1535 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj);
1536 }
1537 return obj;
1538 }
1539
1540 oop JvmtiExport::jni_SetField_probe_nh(JavaThread *thread, jobject jobj, oop obj,
1541 Klass* klass, jfieldID fieldID, bool is_static,
1542 char sig_type, jvalue *value) {
1543 if (*((int *)get_field_modification_count_addr()) > 0 && thread->has_last_Java_frame()) {
1544 // At least one field modification watch is set so we have more work
1545 // to do. This wrapper is used by "quick" entry points that don't
1546 // allow us to create handles in post_field_modification_by_jni(). We
1547 // override that with a ResetNoHandleMark.
1548 ResetNoHandleMark rnhm;
1549 post_field_modification_by_jni(thread, obj, klass, fieldID, is_static, sig_type, value);
1550 // event posting can block so refetch oop if we were passed a jobj
1551 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj);
1552 }
1553 return obj;
1554 }
1555
1556 void JvmtiExport::post_field_modification_by_jni(JavaThread *thread, oop obj,
1557 Klass* klass, jfieldID fieldID, bool is_static,
1558 char sig_type, jvalue *value) {
1559 // We must be called with a Java context in order to provide reasonable
1560 // values for the klazz, method, and location fields. The callers of this
1561 // function don't make the call unless there is a Java context.
1562 assert(thread->has_last_Java_frame(), "must be called with Java context");
1563
1564 ResourceMark rm;
1565 fieldDescriptor fd;
1566 // if get_field_descriptor finds fieldID to be invalid, then we just bail
1567 bool valid_fieldID = JvmtiEnv::get_field_descriptor(klass, fieldID, &fd);
1568 assert(valid_fieldID == true,"post_field_modification_by_jni called with invalid fieldID");
1569 if (!valid_fieldID) return;
1570 // field modifications are not watched so bail
1571 if (!fd.is_field_modification_watched()) return;
1572
1573 HandleMark hm(thread);
1574
1575 Handle h_obj;
1576 if (!is_static) {
1577 // non-static field accessors have an object, but we need a handle
1578 assert(obj != NULL, "non-static needs an object");
1579 h_obj = Handle(thread, obj);
1580 }
1581 KlassHandle h_klass(thread, klass);
1582 post_field_modification(thread,
1583 thread->last_frame().interpreter_frame_method(),
1584 thread->last_frame().interpreter_frame_bcp(),
1585 h_klass, h_obj, fieldID, sig_type, value);
1586 }
1587
1588 void JvmtiExport::post_raw_field_modification(JavaThread *thread, Method* method,
1589 address location, KlassHandle field_klass, Handle object, jfieldID field,
1590 char sig_type, jvalue *value) {
1591
1592 if (sig_type == 'I' || sig_type == 'Z' || sig_type == 'C' || sig_type == 'S') {
1593 // 'I' instructions are used for byte, char, short and int.
1594 // determine which it really is, and convert
1595 fieldDescriptor fd;
1596 bool found = JvmtiEnv::get_field_descriptor(field_klass(), field, &fd);
1597 // should be found (if not, leave as is)
1598 if (found) {
1599 jint ival = value->i;
1600 // convert value from int to appropriate type
1601 switch (fd.field_type()) {
1602 case T_BOOLEAN:
1603 sig_type = 'Z';
1604 value->i = 0; // clear it
1605 value->z = (jboolean)ival;
1606 break;
1607 case T_BYTE:
1608 sig_type = 'B';
1609 value->i = 0; // clear it
1610 value->b = (jbyte)ival;
1611 break;
1612 case T_CHAR:
1613 sig_type = 'C';
1614 value->i = 0; // clear it
1615 value->c = (jchar)ival;
1616 break;
1617 case T_SHORT:
1618 sig_type = 'S';
1619 value->i = 0; // clear it
1620 value->s = (jshort)ival;
1621 break;
1622 case T_INT:
1623 // nothing to do
1624 break;
1625 default:
1626 // this is an integer instruction, should be one of above
1627 ShouldNotReachHere();
1628 break;
1629 }
1630 }
1631 }
1632
1633 assert(sig_type != '[', "array should have sig_type == 'L'");
1634 bool handle_created = false;
1635
1636 // convert oop to JNI handle.
1637 if (sig_type == 'L') {
1638 handle_created = true;
1639 value->l = (jobject)JNIHandles::make_local(thread, (oop)value->l);
1640 }
1641
1642 post_field_modification(thread, method, location, field_klass, object, field, sig_type, value);
1643
1644 // Destroy the JNI handle allocated above.
1645 if (handle_created) {
1646 JNIHandles::destroy_local(value->l);
1647 }
1648 }
1649
1650 void JvmtiExport::post_field_modification(JavaThread *thread, Method* method,
1651 address location, KlassHandle field_klass, Handle object, jfieldID field,
1652 char sig_type, jvalue *value_ptr) {
1653
1654 HandleMark hm(thread);
1655 methodHandle mh(thread, method);
1656
1657 JvmtiThreadState *state = thread->jvmti_thread_state();
1658 if (state == NULL) {
1659 return;
1660 }
1661 EVT_TRIG_TRACE(JVMTI_EVENT_FIELD_MODIFICATION,
1662 ("JVMTI [%s] Trg Field Modification event triggered",
1663 JvmtiTrace::safe_get_thread_name(thread)));
1664
1665 JvmtiEnvThreadStateIterator it(state);
1666 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1667 if (ets->is_enabled(JVMTI_EVENT_FIELD_MODIFICATION)) {
1668 EVT_TRACE(JVMTI_EVENT_FIELD_MODIFICATION,
1669 ("JVMTI [%s] Evt Field Modification event sent %s.%s @ %d",
1670 JvmtiTrace::safe_get_thread_name(thread),
1671 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1672 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1673 location - mh()->code_base() ));
1674
1675 JvmtiEnv *env = ets->get_env();
1676 JvmtiLocationEventMark jem(thread, mh, location);
1677 jclass field_jclass = jem.to_jclass(field_klass());
1678 jobject field_jobject = jem.to_jobject(object());
1679 JvmtiJavaThreadEventTransition jet(thread);
1680 jvmtiEventFieldModification callback = env->callbacks()->FieldModification;
1681 if (callback != NULL) {
1682 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1683 jem.jni_methodID(), jem.location(),
1684 field_jclass, field_jobject, field, sig_type, *value_ptr);
1685 }
1686 }
1687 }
1688 }
1689
1690 void JvmtiExport::post_native_method_bind(Method* method, address* function_ptr) {
1691 JavaThread* thread = JavaThread::current();
1692 assert(thread->thread_state() == _thread_in_vm, "must be in vm state");
1693
1694 HandleMark hm(thread);
1695 methodHandle mh(thread, method);
1696
1697 EVT_TRIG_TRACE(JVMTI_EVENT_NATIVE_METHOD_BIND, ("JVMTI [%s] Trg Native Method Bind event triggered",
1698 JvmtiTrace::safe_get_thread_name(thread)));
1699
1700 if (JvmtiEventController::is_enabled(JVMTI_EVENT_NATIVE_METHOD_BIND)) {
1701 JvmtiEnvIterator it;
1702 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1703 if (env->is_enabled(JVMTI_EVENT_NATIVE_METHOD_BIND)) {
1704 EVT_TRACE(JVMTI_EVENT_NATIVE_METHOD_BIND, ("JVMTI [%s] Evt Native Method Bind event sent",
1705 JvmtiTrace::safe_get_thread_name(thread) ));
1706
1707 JvmtiMethodEventMark jem(thread, mh);
1708 JvmtiJavaThreadEventTransition jet(thread);
1709 JNIEnv* jni_env = JvmtiEnv::get_phase() == JVMTI_PHASE_PRIMORDIAL? NULL : jem.jni_env();
1710 jvmtiEventNativeMethodBind callback = env->callbacks()->NativeMethodBind;
1711 if (callback != NULL) {
1712 (*callback)(env->jvmti_external(), jni_env, jem.jni_thread(),
1713 jem.jni_methodID(), (void*)(*function_ptr), (void**)function_ptr);
1714 }
1715 }
1716 }
1717 }
1718 }
1719
1720 // Returns a record containing inlining information for the given nmethod
1721 jvmtiCompiledMethodLoadInlineRecord* create_inline_record(nmethod* nm) {
1722 jint numstackframes = 0;
1723 jvmtiCompiledMethodLoadInlineRecord* record = (jvmtiCompiledMethodLoadInlineRecord*)NEW_RESOURCE_OBJ(jvmtiCompiledMethodLoadInlineRecord);
1724 record->header.kind = JVMTI_CMLR_INLINE_INFO;
1725 record->header.next = NULL;
1726 record->header.majorinfoversion = JVMTI_CMLR_MAJOR_VERSION_1;
1727 record->header.minorinfoversion = JVMTI_CMLR_MINOR_VERSION_0;
1728 record->numpcs = 0;
1729 for(PcDesc* p = nm->scopes_pcs_begin(); p < nm->scopes_pcs_end(); p++) {
1730 if(p->scope_decode_offset() == DebugInformationRecorder::serialized_null) continue;
1731 record->numpcs++;
1732 }
1733 record->pcinfo = (PCStackInfo*)(NEW_RESOURCE_ARRAY(PCStackInfo, record->numpcs));
1734 int scope = 0;
1735 for(PcDesc* p = nm->scopes_pcs_begin(); p < nm->scopes_pcs_end(); p++) {
1736 if(p->scope_decode_offset() == DebugInformationRecorder::serialized_null) continue;
1737 void* pc_address = (void*)p->real_pc(nm);
1738 assert(pc_address != NULL, "pc_address must be non-null");
1739 record->pcinfo[scope].pc = pc_address;
1740 numstackframes=0;
1741 for(ScopeDesc* sd = nm->scope_desc_at(p->real_pc(nm));sd != NULL;sd = sd->sender()) {
1742 numstackframes++;
1743 }
1744 assert(numstackframes != 0, "numstackframes must be nonzero.");
1745 record->pcinfo[scope].methods = (jmethodID *)NEW_RESOURCE_ARRAY(jmethodID, numstackframes);
1746 record->pcinfo[scope].bcis = (jint *)NEW_RESOURCE_ARRAY(jint, numstackframes);
1747 record->pcinfo[scope].numstackframes = numstackframes;
1748 int stackframe = 0;
1749 for(ScopeDesc* sd = nm->scope_desc_at(p->real_pc(nm));sd != NULL;sd = sd->sender()) {
1750 // 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()
1751 assert(sd->method() != NULL, "sd->method() cannot be null.");
1752 record->pcinfo[scope].methods[stackframe] = sd->method()->jmethod_id();
1753 record->pcinfo[scope].bcis[stackframe] = sd->bci();
1754 stackframe++;
1755 }
1756 scope++;
1757 }
1758 return record;
1759 }
1760
1761 void JvmtiExport::post_compiled_method_load(nmethod *nm) {
1762 JavaThread* thread = JavaThread::current();
1763
1764 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
1765 ("JVMTI [%s] method compile load event triggered",
1766 JvmtiTrace::safe_get_thread_name(thread)));
1767
1768 JvmtiEnvIterator it;
1769 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1770 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_LOAD)) {
1771
1772 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
1773 ("JVMTI [%s] class compile method load event sent %s.%s ",
1774 JvmtiTrace::safe_get_thread_name(thread),
1775 (nm->method() == NULL) ? "NULL" : nm->method()->klass_name()->as_C_string(),
1776 (nm->method() == NULL) ? "NULL" : nm->method()->name()->as_C_string()));
1777 ResourceMark rm(thread);
1778 HandleMark hm(thread);
1779
1780 // Add inlining information
1781 jvmtiCompiledMethodLoadInlineRecord* inlinerecord = create_inline_record(nm);
1782 // Pass inlining information through the void pointer
1783 JvmtiCompiledMethodLoadEventMark jem(thread, nm, inlinerecord);
1784 JvmtiJavaThreadEventTransition jet(thread);
1785 jvmtiEventCompiledMethodLoad callback = env->callbacks()->CompiledMethodLoad;
1786 if (callback != NULL) {
1787 (*callback)(env->jvmti_external(), jem.jni_methodID(),
1788 jem.code_size(), jem.code_data(), jem.map_length(),
1789 jem.map(), jem.compile_info());
1790 }
1791 }
1792 }
1793 }
1794
1795
1796 // post a COMPILED_METHOD_LOAD event for a given environment
1797 void JvmtiExport::post_compiled_method_load(JvmtiEnv* env, const jmethodID method, const jint length,
1798 const void *code_begin, const jint map_length,
1799 const jvmtiAddrLocationMap* map)
1800 {
1801 JavaThread* thread = JavaThread::current();
1802 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
1803 ("JVMTI [%s] method compile load event triggered (by GenerateEvents)",
1804 JvmtiTrace::safe_get_thread_name(thread)));
1805 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_LOAD)) {
1806
1807 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
1808 ("JVMTI [%s] class compile method load event sent (by GenerateEvents), jmethodID=" PTR_FORMAT,
1809 JvmtiTrace::safe_get_thread_name(thread), method));
1810
1811 JvmtiEventMark jem(thread);
1812 JvmtiJavaThreadEventTransition jet(thread);
1813 jvmtiEventCompiledMethodLoad callback = env->callbacks()->CompiledMethodLoad;
1814 if (callback != NULL) {
1815 (*callback)(env->jvmti_external(), method,
1816 length, code_begin, map_length,
1817 map, NULL);
1818 }
1819 }
1820 }
1821
1822 void JvmtiExport::post_dynamic_code_generated_internal(const char *name, const void *code_begin, const void *code_end) {
1823 assert(name != NULL && name[0] != '\0', "sanity check");
1824
1825 JavaThread* thread = JavaThread::current();
1826 // In theory everyone coming thru here is in_vm but we need to be certain
1827 // because a callee will do a vm->native transition
1828 ThreadInVMfromUnknown __tiv;
1829
1830 EVT_TRIG_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED,
1831 ("JVMTI [%s] method dynamic code generated event triggered",
1832 JvmtiTrace::safe_get_thread_name(thread)));
1833 JvmtiEnvIterator it;
1834 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1835 if (env->is_enabled(JVMTI_EVENT_DYNAMIC_CODE_GENERATED)) {
1836 EVT_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED,
1837 ("JVMTI [%s] dynamic code generated event sent for %s",
1838 JvmtiTrace::safe_get_thread_name(thread), name));
1839 JvmtiEventMark jem(thread);
1840 JvmtiJavaThreadEventTransition jet(thread);
1841 jint length = (jint)pointer_delta(code_end, code_begin, sizeof(char));
1842 jvmtiEventDynamicCodeGenerated callback = env->callbacks()->DynamicCodeGenerated;
1843 if (callback != NULL) {
1844 (*callback)(env->jvmti_external(), name, (void*)code_begin, length);
1845 }
1846 }
1847 }
1848 }
1849
1850 void JvmtiExport::post_dynamic_code_generated(const char *name, const void *code_begin, const void *code_end) {
1851 jvmtiPhase phase = JvmtiEnv::get_phase();
1852 if (phase == JVMTI_PHASE_PRIMORDIAL || phase == JVMTI_PHASE_START) {
1853 post_dynamic_code_generated_internal(name, code_begin, code_end);
1854 } else {
1855 // It may not be safe to post the event from this thread. Defer all
1856 // postings to the service thread so that it can perform them in a safe
1857 // context and in-order.
1858 MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag);
1859 JvmtiDeferredEvent event = JvmtiDeferredEvent::dynamic_code_generated_event(
1860 name, code_begin, code_end);
1861 JvmtiDeferredEventQueue::enqueue(event);
1862 }
1863 }
1864
1865
1866 // post a DYNAMIC_CODE_GENERATED event for a given environment
1867 // used by GenerateEvents
1868 void JvmtiExport::post_dynamic_code_generated(JvmtiEnv* env, const char *name,
1869 const void *code_begin, const void *code_end)
1870 {
1871 JavaThread* thread = JavaThread::current();
1872 EVT_TRIG_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED,
1873 ("JVMTI [%s] dynamic code generated event triggered (by GenerateEvents)",
1874 JvmtiTrace::safe_get_thread_name(thread)));
1875 if (env->is_enabled(JVMTI_EVENT_DYNAMIC_CODE_GENERATED)) {
1876 EVT_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED,
1877 ("JVMTI [%s] dynamic code generated event sent for %s",
1878 JvmtiTrace::safe_get_thread_name(thread), name));
1879 JvmtiEventMark jem(thread);
1880 JvmtiJavaThreadEventTransition jet(thread);
1881 jint length = (jint)pointer_delta(code_end, code_begin, sizeof(char));
1882 jvmtiEventDynamicCodeGenerated callback = env->callbacks()->DynamicCodeGenerated;
1883 if (callback != NULL) {
1884 (*callback)(env->jvmti_external(), name, (void*)code_begin, length);
1885 }
1886 }
1887 }
1888
1889 // post a DynamicCodeGenerated event while holding locks in the VM.
1890 void JvmtiExport::post_dynamic_code_generated_while_holding_locks(const char* name,
1891 address code_begin, address code_end)
1892 {
1893 // register the stub with the current dynamic code event collector
1894 JvmtiThreadState* state = JvmtiThreadState::state_for(JavaThread::current());
1895 // state can only be NULL if the current thread is exiting which
1896 // should not happen since we're trying to post an event
1897 guarantee(state != NULL, "attempt to register stub via an exiting thread");
1898 JvmtiDynamicCodeEventCollector* collector = state->get_dynamic_code_event_collector();
1899 guarantee(collector != NULL, "attempt to register stub without event collector");
1900 collector->register_stub(name, code_begin, code_end);
1901 }
1902
1903 // Collect all the vm internally allocated objects which are visible to java world
1904 void JvmtiExport::record_vm_internal_object_allocation(oop obj) {
1905 Thread* thread = ThreadLocalStorage::thread();
1906 if (thread != NULL && thread->is_Java_thread()) {
1907 // Can not take safepoint here.
1908 No_Safepoint_Verifier no_sfpt;
1909 // Can not take safepoint here so can not use state_for to get
1910 // jvmti thread state.
1911 JvmtiThreadState *state = ((JavaThread*)thread)->jvmti_thread_state();
1912 if (state != NULL ) {
1913 // state is non NULL when VMObjectAllocEventCollector is enabled.
1914 JvmtiVMObjectAllocEventCollector *collector;
1915 collector = state->get_vm_object_alloc_event_collector();
1916 if (collector != NULL && collector->is_enabled()) {
1917 // Don't record classes as these will be notified via the ClassLoad
1918 // event.
1919 if (obj->klass() != SystemDictionary::Class_klass()) {
1920 collector->record_allocation(obj);
1921 }
1922 }
1923 }
1924 }
1925 }
1926
1927 void JvmtiExport::post_garbage_collection_finish() {
1928 Thread *thread = Thread::current(); // this event is posted from VM-Thread.
1929 EVT_TRIG_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH,
1930 ("JVMTI [%s] garbage collection finish event triggered",
1931 JvmtiTrace::safe_get_thread_name(thread)));
1932 JvmtiEnvIterator it;
1933 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1934 if (env->is_enabled(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH)) {
1935 EVT_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH,
1936 ("JVMTI [%s] garbage collection finish event sent ",
1937 JvmtiTrace::safe_get_thread_name(thread)));
1938 JvmtiThreadEventTransition jet(thread);
1939 // JNIEnv is NULL here because this event is posted from VM Thread
1940 jvmtiEventGarbageCollectionFinish callback = env->callbacks()->GarbageCollectionFinish;
1941 if (callback != NULL) {
1942 (*callback)(env->jvmti_external());
1943 }
1944 }
1945 }
1946 }
1947
1948 void JvmtiExport::post_garbage_collection_start() {
1949 Thread* thread = Thread::current(); // this event is posted from vm-thread.
1950 EVT_TRIG_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_START,
1951 ("JVMTI [%s] garbage collection start event triggered",
1952 JvmtiTrace::safe_get_thread_name(thread)));
1953 JvmtiEnvIterator it;
1954 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1955 if (env->is_enabled(JVMTI_EVENT_GARBAGE_COLLECTION_START)) {
1956 EVT_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_START,
1957 ("JVMTI [%s] garbage collection start event sent ",
1958 JvmtiTrace::safe_get_thread_name(thread)));
1959 JvmtiThreadEventTransition jet(thread);
1960 // JNIEnv is NULL here because this event is posted from VM Thread
1961 jvmtiEventGarbageCollectionStart callback = env->callbacks()->GarbageCollectionStart;
1962 if (callback != NULL) {
1963 (*callback)(env->jvmti_external());
1964 }
1965 }
1966 }
1967 }
1968
1969 void JvmtiExport::post_data_dump() {
1970 Thread *thread = Thread::current();
1971 EVT_TRIG_TRACE(JVMTI_EVENT_DATA_DUMP_REQUEST,
1972 ("JVMTI [%s] data dump request event triggered",
1973 JvmtiTrace::safe_get_thread_name(thread)));
1974 JvmtiEnvIterator it;
1975 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1976 if (env->is_enabled(JVMTI_EVENT_DATA_DUMP_REQUEST)) {
1977 EVT_TRACE(JVMTI_EVENT_DATA_DUMP_REQUEST,
1978 ("JVMTI [%s] data dump request event sent ",
1979 JvmtiTrace::safe_get_thread_name(thread)));
1980 JvmtiThreadEventTransition jet(thread);
1981 // JNIEnv is NULL here because this event is posted from VM Thread
1982 jvmtiEventDataDumpRequest callback = env->callbacks()->DataDumpRequest;
1983 if (callback != NULL) {
1984 (*callback)(env->jvmti_external());
1985 }
1986 }
1987 }
1988 }
1989
1990 void JvmtiExport::post_monitor_contended_enter(JavaThread *thread, ObjectMonitor *obj_mntr) {
1991 oop object = (oop)obj_mntr->object();
1992 if (!ServiceUtil::visible_oop(object)) {
1993 // Ignore monitor contended enter for vm internal object.
1994 return;
1995 }
1996 JvmtiThreadState *state = thread->jvmti_thread_state();
1997 if (state == NULL) {
1998 return;
1999 }
2000
2001 HandleMark hm(thread);
2002 Handle h(thread, object);
2003
2004 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTER,
2005 ("JVMTI [%s] montior contended enter event triggered",
2006 JvmtiTrace::safe_get_thread_name(thread)));
2007
2008 JvmtiEnvThreadStateIterator it(state);
2009 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
2010 if (ets->is_enabled(JVMTI_EVENT_MONITOR_CONTENDED_ENTER)) {
2011 EVT_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTER,
2012 ("JVMTI [%s] monitor contended enter event sent",
2013 JvmtiTrace::safe_get_thread_name(thread)));
2014 JvmtiMonitorEventMark jem(thread, h());
2015 JvmtiEnv *env = ets->get_env();
2016 JvmtiThreadEventTransition jet(thread);
2017 jvmtiEventMonitorContendedEnter callback = env->callbacks()->MonitorContendedEnter;
2018 if (callback != NULL) {
2019 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_object());
2020 }
2021 }
2022 }
2023 }
2024
2025 void JvmtiExport::post_monitor_contended_entered(JavaThread *thread, ObjectMonitor *obj_mntr) {
2026 oop object = (oop)obj_mntr->object();
2027 if (!ServiceUtil::visible_oop(object)) {
2028 // Ignore monitor contended entered for vm internal object.
2029 return;
2030 }
2031 JvmtiThreadState *state = thread->jvmti_thread_state();
2032 if (state == NULL) {
2033 return;
2034 }
2035
2036 HandleMark hm(thread);
2037 Handle h(thread, object);
2038
2039 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED,
2040 ("JVMTI [%s] montior contended entered event triggered",
2041 JvmtiTrace::safe_get_thread_name(thread)));
2042
2043 JvmtiEnvThreadStateIterator it(state);
2044 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
2045 if (ets->is_enabled(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED)) {
2046 EVT_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED,
2047 ("JVMTI [%s] monitor contended enter event sent",
2048 JvmtiTrace::safe_get_thread_name(thread)));
2049 JvmtiMonitorEventMark jem(thread, h());
2050 JvmtiEnv *env = ets->get_env();
2051 JvmtiThreadEventTransition jet(thread);
2052 jvmtiEventMonitorContendedEntered callback = env->callbacks()->MonitorContendedEntered;
2053 if (callback != NULL) {
2054 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_object());
2055 }
2056 }
2057 }
2058 }
2059
2060 void JvmtiExport::post_monitor_wait(JavaThread *thread, oop object,
2061 jlong timeout) {
2062 JvmtiThreadState *state = thread->jvmti_thread_state();
2063 if (state == NULL) {
2064 return;
2065 }
2066
2067 HandleMark hm(thread);
2068 Handle h(thread, object);
2069
2070 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_WAIT,
2071 ("JVMTI [%s] montior wait event triggered",
2072 JvmtiTrace::safe_get_thread_name(thread)));
2073
2074 JvmtiEnvThreadStateIterator it(state);
2075 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
2076 if (ets->is_enabled(JVMTI_EVENT_MONITOR_WAIT)) {
2077 EVT_TRACE(JVMTI_EVENT_MONITOR_WAIT,
2078 ("JVMTI [%s] monitor wait event sent ",
2079 JvmtiTrace::safe_get_thread_name(thread)));
2080 JvmtiMonitorEventMark jem(thread, h());
2081 JvmtiEnv *env = ets->get_env();
2082 JvmtiThreadEventTransition jet(thread);
2083 jvmtiEventMonitorWait callback = env->callbacks()->MonitorWait;
2084 if (callback != NULL) {
2085 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
2086 jem.jni_object(), timeout);
2087 }
2088 }
2089 }
2090 }
2091
2092 void JvmtiExport::post_monitor_waited(JavaThread *thread, ObjectMonitor *obj_mntr, jboolean timed_out) {
2093 oop object = (oop)obj_mntr->object();
2094 if (!ServiceUtil::visible_oop(object)) {
2095 // Ignore monitor waited for vm internal object.
2096 return;
2097 }
2098 JvmtiThreadState *state = thread->jvmti_thread_state();
2099 if (state == NULL) {
2100 return;
2101 }
2102
2103 HandleMark hm(thread);
2104 Handle h(thread, object);
2105
2106 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_WAITED,
2107 ("JVMTI [%s] montior waited event triggered",
2108 JvmtiTrace::safe_get_thread_name(thread)));
2109
2110 JvmtiEnvThreadStateIterator it(state);
2111 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
2112 if (ets->is_enabled(JVMTI_EVENT_MONITOR_WAITED)) {
2113 EVT_TRACE(JVMTI_EVENT_MONITOR_WAITED,
2114 ("JVMTI [%s] monitor waited event sent ",
2115 JvmtiTrace::safe_get_thread_name(thread)));
2116 JvmtiMonitorEventMark jem(thread, h());
2117 JvmtiEnv *env = ets->get_env();
2118 JvmtiThreadEventTransition jet(thread);
2119 jvmtiEventMonitorWaited callback = env->callbacks()->MonitorWaited;
2120 if (callback != NULL) {
2121 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
2122 jem.jni_object(), timed_out);
2123 }
2124 }
2125 }
2126 }
2127
2128
2129 void JvmtiExport::post_vm_object_alloc(JavaThread *thread, oop object) {
2130 EVT_TRIG_TRACE(JVMTI_EVENT_VM_OBJECT_ALLOC, ("JVMTI [%s] Trg vm object alloc triggered",
2131 JvmtiTrace::safe_get_thread_name(thread)));
2132 if (object == NULL) {
2133 return;
2134 }
2135 HandleMark hm(thread);
2136 Handle h(thread, object);
2137 JvmtiEnvIterator it;
2138 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
2139 if (env->is_enabled(JVMTI_EVENT_VM_OBJECT_ALLOC)) {
2140 EVT_TRACE(JVMTI_EVENT_VM_OBJECT_ALLOC, ("JVMTI [%s] Evt vmobject alloc sent %s",
2141 JvmtiTrace::safe_get_thread_name(thread),
2142 object==NULL? "NULL" : java_lang_Class::as_Klass(object)->external_name()));
2143
2144 JvmtiVMObjectAllocEventMark jem(thread, h());
2145 JvmtiJavaThreadEventTransition jet(thread);
2146 jvmtiEventVMObjectAlloc callback = env->callbacks()->VMObjectAlloc;
2147 if (callback != NULL) {
2148 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
2149 jem.jni_jobject(), jem.jni_class(), jem.size());
2150 }
2151 }
2152 }
2153 }
2154
2155 ////////////////////////////////////////////////////////////////////////////////////////////////
2156
2157 void JvmtiExport::cleanup_thread(JavaThread* thread) {
2158 assert(JavaThread::current() == thread, "thread is not current");
2159 MutexLocker mu(JvmtiThreadState_lock);
2160
2161 if (thread->jvmti_thread_state() != NULL) {
2162 // This has to happen after the thread state is removed, which is
2163 // why it is not in post_thread_end_event like its complement
2164 // Maybe both these functions should be rolled into the posts?
2165 JvmtiEventController::thread_ended(thread);
2166 }
2167 }
2168
2169 void JvmtiExport::clear_detected_exception(JavaThread* thread) {
2170 assert(JavaThread::current() == thread, "thread is not current");
2171
2172 JvmtiThreadState* state = thread->jvmti_thread_state();
2173 if (state != NULL) {
2174 state->clear_exception_detected();
2175 }
2176 }
2177
2178 void JvmtiExport::oops_do(OopClosure* f) {
2179 JvmtiCurrentBreakpoints::oops_do(f);
2180 JvmtiVMObjectAllocEventCollector::oops_do_for_all_threads(f);
2181 }
2182
2183 void JvmtiExport::weak_oops_do(BoolObjectClosure* is_alive, OopClosure* f) {
2184 JvmtiTagMap::weak_oops_do(is_alive, f);
2185 }
2186
2187 void JvmtiExport::gc_epilogue() {
2188 JvmtiCurrentBreakpoints::gc_epilogue();
2189 }
2190
2191 // Onload raw monitor transition.
2192 void JvmtiExport::transition_pending_onload_raw_monitors() {
2193 JvmtiPendingMonitors::transition_raw_monitors();
2194 }
2195
2196 ////////////////////////////////////////////////////////////////////////////////////////////////
2197
2198 // type for the Agent_OnAttach entry point
2199 extern "C" {
2200 typedef jint (JNICALL *OnAttachEntry_t)(JavaVM*, char *, void *);
2201 }
2202
2203 jint JvmtiExport::load_agent_library(AttachOperation* op, outputStream* st) {
2204 char ebuf[1024];
2205 char buffer[JVM_MAXPATHLEN];
2206 void* library = NULL;
2207 jint result = JNI_ERR;
2208 const char *on_attach_symbols[] = AGENT_ONATTACH_SYMBOLS;
2209 size_t num_symbol_entries = ARRAY_SIZE(on_attach_symbols);
2210
2211 // get agent name and options
2212 const char* agent = op->arg(0);
2213 const char* absParam = op->arg(1);
2214 const char* options = op->arg(2);
2215
2216 // The abs paramter should be "true" or "false"
2217 bool is_absolute_path = (absParam != NULL) && (strcmp(absParam,"true")==0);
2218
2219 // Initially marked as invalid. It will be set to valid if we can find the agent
2220 AgentLibrary *agent_lib = new AgentLibrary(agent, options, is_absolute_path, NULL);
2221
2222 // Check for statically linked in agent. If not found then if the path is
2223 // absolute we attempt to load the library. Otherwise we try to load it
2224 // from the standard dll directory.
2225
2226 if (!os::find_builtin_agent(agent_lib, on_attach_symbols, num_symbol_entries)) {
2227 if (is_absolute_path) {
2228 library = os::dll_load(agent, ebuf, sizeof ebuf);
2229 } else {
2230 // Try to load the agent from the standard dll directory
2231 if (os::dll_build_name(buffer, sizeof(buffer), Arguments::get_dll_dir(),
2232 agent)) {
2233 library = os::dll_load(buffer, ebuf, sizeof ebuf);
2234 }
2235 if (library == NULL) {
2236 // not found - try local path
2237 char ns[1] = {0};
2238 if (os::dll_build_name(buffer, sizeof(buffer), ns, agent)) {
2239 library = os::dll_load(buffer, ebuf, sizeof ebuf);
2240 }
2241 }
2242 }
2243 if (library != NULL) {
2244 agent_lib->set_os_lib(library);
2245 agent_lib->set_valid();
2246 }
2247 }
2248 // If the library was loaded then we attempt to invoke the Agent_OnAttach
2249 // function
2250 if (agent_lib->valid()) {
2251 // Lookup the Agent_OnAttach function
2252 OnAttachEntry_t on_attach_entry = NULL;
2253 on_attach_entry = CAST_TO_FN_PTR(OnAttachEntry_t,
2254 os::find_agent_function(agent_lib, false, on_attach_symbols, num_symbol_entries));
2255 if (on_attach_entry == NULL) {
2256 // Agent_OnAttach missing - unload library
2257 if (!agent_lib->is_static_lib()) {
2258 os::dll_unload(library);
2259 }
2260 delete agent_lib;
2261 } else {
2262 // Invoke the Agent_OnAttach function
2263 JavaThread* THREAD = JavaThread::current();
2264 {
2265 extern struct JavaVM_ main_vm;
2266 JvmtiThreadEventMark jem(THREAD);
2267 JvmtiJavaThreadEventTransition jet(THREAD);
2268
2269 result = (*on_attach_entry)(&main_vm, (char*)options, NULL);
2270 }
2271
2272 // Agent_OnAttach may have used JNI
2273 if (HAS_PENDING_EXCEPTION) {
2274 CLEAR_PENDING_EXCEPTION;
2275 }
2276
2277 // If OnAttach returns JNI_OK then we add it to the list of
2278 // agent libraries so that we can call Agent_OnUnload later.
2279 if (result == JNI_OK) {
2280 Arguments::add_loaded_agent(agent_lib);
2281 } else {
2282 delete agent_lib;
2283 }
2284
2285 // Agent_OnAttach executed so completion status is JNI_OK
2286 st->print_cr("%d", result);
2287 result = JNI_OK;
2288 }
2289 }
2290 return result;
2291 }
2292
2293 ////////////////////////////////////////////////////////////////////////////////////////////////
2294
2295 // Setup current current thread for event collection.
2296 void JvmtiEventCollector::setup_jvmti_thread_state() {
2297 // set this event collector to be the current one.
2298 JvmtiThreadState* state = JvmtiThreadState::state_for(JavaThread::current());
2299 // state can only be NULL if the current thread is exiting which
2300 // should not happen since we're trying to configure for event collection
2301 guarantee(state != NULL, "exiting thread called setup_jvmti_thread_state");
2302 if (is_vm_object_alloc_event()) {
2303 _prev = state->get_vm_object_alloc_event_collector();
2304 state->set_vm_object_alloc_event_collector((JvmtiVMObjectAllocEventCollector *)this);
2305 } else if (is_dynamic_code_event()) {
2306 _prev = state->get_dynamic_code_event_collector();
2307 state->set_dynamic_code_event_collector((JvmtiDynamicCodeEventCollector *)this);
2308 }
2309 }
2310
2311 // Unset current event collection in this thread and reset it with previous
2312 // collector.
2313 void JvmtiEventCollector::unset_jvmti_thread_state() {
2314 JvmtiThreadState* state = JavaThread::current()->jvmti_thread_state();
2315 if (state != NULL) {
2316 // restore the previous event collector (if any)
2317 if (is_vm_object_alloc_event()) {
2318 if (state->get_vm_object_alloc_event_collector() == this) {
2319 state->set_vm_object_alloc_event_collector((JvmtiVMObjectAllocEventCollector *)_prev);
2320 } else {
2321 // this thread's jvmti state was created during the scope of
2322 // the event collector.
2323 }
2324 } else {
2325 if (is_dynamic_code_event()) {
2326 if (state->get_dynamic_code_event_collector() == this) {
2327 state->set_dynamic_code_event_collector((JvmtiDynamicCodeEventCollector *)_prev);
2328 } else {
2329 // this thread's jvmti state was created during the scope of
2330 // the event collector.
2331 }
2332 }
2333 }
2334 }
2335 }
2336
2337 // create the dynamic code event collector
2338 JvmtiDynamicCodeEventCollector::JvmtiDynamicCodeEventCollector() : _code_blobs(NULL) {
2339 if (JvmtiExport::should_post_dynamic_code_generated()) {
2340 setup_jvmti_thread_state();
2341 }
2342 }
2343
2344 // iterate over any code blob descriptors collected and post a
2345 // DYNAMIC_CODE_GENERATED event to the profiler.
2346 JvmtiDynamicCodeEventCollector::~JvmtiDynamicCodeEventCollector() {
2347 assert(!JavaThread::current()->owns_locks(), "all locks must be released to post deferred events");
2348 // iterate over any code blob descriptors that we collected
2349 if (_code_blobs != NULL) {
2350 for (int i=0; i<_code_blobs->length(); i++) {
2351 JvmtiCodeBlobDesc* blob = _code_blobs->at(i);
2352 JvmtiExport::post_dynamic_code_generated(blob->name(), blob->code_begin(), blob->code_end());
2353 FreeHeap(blob);
2354 }
2355 delete _code_blobs;
2356 }
2357 unset_jvmti_thread_state();
2358 }
2359
2360 // register a stub
2361 void JvmtiDynamicCodeEventCollector::register_stub(const char* name, address start, address end) {
2362 if (_code_blobs == NULL) {
2363 _code_blobs = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<JvmtiCodeBlobDesc*>(1,true);
2364 }
2365 _code_blobs->append(new JvmtiCodeBlobDesc(name, start, end));
2366 }
2367
2368 // Setup current thread to record vm allocated objects.
2369 JvmtiVMObjectAllocEventCollector::JvmtiVMObjectAllocEventCollector() : _allocated(NULL) {
2370 if (JvmtiExport::should_post_vm_object_alloc()) {
2371 _enable = true;
2372 setup_jvmti_thread_state();
2373 } else {
2374 _enable = false;
2375 }
2376 }
2377
2378 // Post vm_object_alloc event for vm allocated objects visible to java
2379 // world.
2380 JvmtiVMObjectAllocEventCollector::~JvmtiVMObjectAllocEventCollector() {
2381 if (_allocated != NULL) {
2382 set_enabled(false);
2383 for (int i = 0; i < _allocated->length(); i++) {
2384 oop obj = _allocated->at(i);
2385 if (ServiceUtil::visible_oop(obj)) {
2386 JvmtiExport::post_vm_object_alloc(JavaThread::current(), obj);
2387 }
2388 }
2389 delete _allocated;
2390 }
2391 unset_jvmti_thread_state();
2392 }
2393
2394 void JvmtiVMObjectAllocEventCollector::record_allocation(oop obj) {
2395 assert(is_enabled(), "VM object alloc event collector is not enabled");
2396 if (_allocated == NULL) {
2397 _allocated = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<oop>(1, true);
2398 }
2399 _allocated->push(obj);
2400 }
2401
2402 // GC support.
2403 void JvmtiVMObjectAllocEventCollector::oops_do(OopClosure* f) {
2404 if (_allocated != NULL) {
2405 for(int i=_allocated->length() - 1; i >= 0; i--) {
2406 if (_allocated->at(i) != NULL) {
2407 f->do_oop(_allocated->adr_at(i));
2408 }
2409 }
2410 }
2411 }
2412
2413 void JvmtiVMObjectAllocEventCollector::oops_do_for_all_threads(OopClosure* f) {
2414 // no-op if jvmti not enabled
2415 if (!JvmtiEnv::environments_might_exist()) {
2416 return;
2417 }
2418
2419 // Runs at safepoint. So no need to acquire Threads_lock.
2420 for (JavaThread *jthr = Threads::first(); jthr != NULL; jthr = jthr->next()) {
2421 JvmtiThreadState *state = jthr->jvmti_thread_state();
2422 if (state != NULL) {
2423 JvmtiVMObjectAllocEventCollector *collector;
2424 collector = state->get_vm_object_alloc_event_collector();
2425 while (collector != NULL) {
2426 collector->oops_do(f);
2427 collector = (JvmtiVMObjectAllocEventCollector *)collector->get_prev();
2428 }
2429 }
2430 }
2431 }
2432
2433
2434 // Disable collection of VMObjectAlloc events
2435 NoJvmtiVMObjectAllocMark::NoJvmtiVMObjectAllocMark() : _collector(NULL) {
2436 // a no-op if VMObjectAlloc event is not enabled
2437 if (!JvmtiExport::should_post_vm_object_alloc()) {
2438 return;
2439 }
2440 Thread* thread = ThreadLocalStorage::thread();
2441 if (thread != NULL && thread->is_Java_thread()) {
2442 JavaThread* current_thread = (JavaThread*)thread;
2443 JvmtiThreadState *state = current_thread->jvmti_thread_state();
2444 if (state != NULL) {
2445 JvmtiVMObjectAllocEventCollector *collector;
2446 collector = state->get_vm_object_alloc_event_collector();
2447 if (collector != NULL && collector->is_enabled()) {
2448 _collector = collector;
2449 _collector->set_enabled(false);
2450 }
2451 }
2452 }
2453 }
2454
2455 // Re-Enable collection of VMObjectAlloc events (if previously enabled)
2456 NoJvmtiVMObjectAllocMark::~NoJvmtiVMObjectAllocMark() {
2457 if (was_enabled()) {
2458 _collector->set_enabled(true);
2459 }
2460 };
2461
2462 JvmtiGCMarker::JvmtiGCMarker() {
2463 // if there aren't any JVMTI environments then nothing to do
2464 if (!JvmtiEnv::environments_might_exist()) {
2465 return;
2466 }
2467
2468 if (JvmtiExport::should_post_garbage_collection_start()) {
2469 JvmtiExport::post_garbage_collection_start();
2470 }
2471
2472 if (SafepointSynchronize::is_at_safepoint()) {
2473 // Do clean up tasks that need to be done at a safepoint
2474 JvmtiEnvBase::check_for_periodic_clean_up();
2475 }
2476 }
2477
2478 JvmtiGCMarker::~JvmtiGCMarker() {
2479 // if there aren't any JVMTI environments then nothing to do
2480 if (!JvmtiEnv::environments_might_exist()) {
2481 return;
2482 }
2483
2484 // JVMTI notify gc finish
2485 if (JvmtiExport::should_post_garbage_collection_finish()) {
2486 JvmtiExport::post_garbage_collection_finish();
2487 }
2488 }