1 /*
2 * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/systemDictionary.hpp"
27 #include "code/nmethod.hpp"
28 #include "code/pcDesc.hpp"
29 #include "code/scopeDesc.hpp"
30 #include "interpreter/interpreter.hpp"
31 #include "jvmtifiles/jvmtiEnv.hpp"
32 #include "memory/resourceArea.hpp"
33 #include "oops/objArrayKlass.hpp"
34 #include "oops/objArrayOop.hpp"
35 #include "prims/jvmtiCodeBlobEvents.hpp"
36 #include "prims/jvmtiEventController.hpp"
37 #include "prims/jvmtiEventController.inline.hpp"
38 #include "prims/jvmtiExport.hpp"
39 #include "prims/jvmtiImpl.hpp"
40 #include "prims/jvmtiManageCapabilities.hpp"
41 #include "prims/jvmtiRawMonitor.hpp"
42 #include "prims/jvmtiTagMap.hpp"
43 #include "prims/jvmtiThreadState.inline.hpp"
44 #include "prims/jvmtiRedefineClasses.hpp"
45 #include "runtime/arguments.hpp"
46 #include "runtime/handles.hpp"
47 #include "runtime/interfaceSupport.hpp"
48 #include "runtime/objectMonitor.hpp"
49 #include "runtime/objectMonitor.inline.hpp"
50 #include "runtime/thread.hpp"
51 #include "runtime/vframe.hpp"
52 #include "services/attachListener.hpp"
53 #include "services/serviceUtil.hpp"
54 #include "utilities/macros.hpp"
55 #if INCLUDE_ALL_GCS
56 #include "gc_implementation/parallelScavenge/psMarkSweep.hpp"
57 #endif // INCLUDE_ALL_GCS
58
59 #ifdef JVMTI_TRACE
60 #define EVT_TRACE(evt,out) if ((JvmtiTrace::event_trace_flags(evt) & JvmtiTrace::SHOW_EVENT_SENT) != 0) { SafeResourceMark rm; tty->print_cr out; }
61 #define EVT_TRIG_TRACE(evt,out) if ((JvmtiTrace::event_trace_flags(evt) & JvmtiTrace::SHOW_EVENT_TRIGGER) != 0) { SafeResourceMark rm; tty->print_cr out; }
62 #else
63 #define EVT_TRIG_TRACE(evt,out)
64 #define EVT_TRACE(evt,out)
65 #endif
66
67 ///////////////////////////////////////////////////////////////
68 //
69 // JvmtiEventTransition
70 //
71 // TO DO --
72 // more handle purging
73
74 // Use this for JavaThreads and state is _thread_in_vm.
75 class JvmtiJavaThreadEventTransition : StackObj {
76 private:
77 ResourceMark _rm;
78 ThreadToNativeFromVM _transition;
79 HandleMark _hm;
80
81 public:
82 JvmtiJavaThreadEventTransition(JavaThread *thread) :
83 _rm(),
84 _transition(thread),
85 _hm(thread) {};
86 };
87
88 // For JavaThreads which are not in _thread_in_vm state
89 // and other system threads use this.
90 class JvmtiThreadEventTransition : StackObj {
91 private:
92 ResourceMark _rm;
93 HandleMark _hm;
94 JavaThreadState _saved_state;
95 JavaThread *_jthread;
96
97 public:
98 JvmtiThreadEventTransition(Thread *thread) : _rm(), _hm() {
99 if (thread->is_Java_thread()) {
100 _jthread = (JavaThread *)thread;
101 _saved_state = _jthread->thread_state();
102 if (_saved_state == _thread_in_Java) {
103 ThreadStateTransition::transition_from_java(_jthread, _thread_in_native);
104 } else {
105 ThreadStateTransition::transition(_jthread, _saved_state, _thread_in_native);
106 }
107 } else {
108 _jthread = NULL;
109 }
110 }
111
112 ~JvmtiThreadEventTransition() {
113 if (_jthread != NULL)
114 ThreadStateTransition::transition_from_native(_jthread, _saved_state);
115 }
116 };
117
118
119 ///////////////////////////////////////////////////////////////
120 //
121 // JvmtiEventMark
122 //
123
124 class JvmtiEventMark : public StackObj {
125 private:
126 JavaThread *_thread;
127 JNIEnv* _jni_env;
128 bool _exception_detected;
129 bool _exception_caught;
130 #if 0
131 JNIHandleBlock* _hblock;
132 #endif
133
134 public:
135 JvmtiEventMark(JavaThread *thread) : _thread(thread),
136 _jni_env(thread->jni_environment()) {
137 #if 0
138 _hblock = thread->active_handles();
139 _hblock->clear_thoroughly(); // so we can be safe
140 #else
141 // we want to use the code above - but that needs the JNIHandle changes - later...
142 // for now, steal JNI push local frame code
143 JvmtiThreadState *state = thread->jvmti_thread_state();
144 // we are before an event.
145 // Save current jvmti thread exception state.
146 if (state != NULL) {
147 _exception_detected = state->is_exception_detected();
148 _exception_caught = state->is_exception_caught();
149 } else {
150 _exception_detected = false;
151 _exception_caught = false;
152 }
153
154 JNIHandleBlock* old_handles = thread->active_handles();
155 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread);
156 assert(new_handles != NULL, "should not be NULL");
157 new_handles->set_pop_frame_link(old_handles);
158 thread->set_active_handles(new_handles);
159 #endif
160 assert(thread == JavaThread::current(), "thread must be current!");
161 thread->frame_anchor()->make_walkable(thread);
162 };
163
164 ~JvmtiEventMark() {
165 #if 0
166 _hblock->clear(); // for consistency with future correct behavior
167 #else
168 // we want to use the code above - but that needs the JNIHandle changes - later...
169 // for now, steal JNI pop local frame code
170 JNIHandleBlock* old_handles = _thread->active_handles();
171 JNIHandleBlock* new_handles = old_handles->pop_frame_link();
172 assert(new_handles != NULL, "should not be NULL");
173 _thread->set_active_handles(new_handles);
174 // Note that we set the pop_frame_link to NULL explicitly, otherwise
175 // the release_block call will release the blocks.
176 old_handles->set_pop_frame_link(NULL);
177 JNIHandleBlock::release_block(old_handles, _thread); // may block
178 #endif
179
180 JvmtiThreadState* state = _thread->jvmti_thread_state();
181 // we are continuing after an event.
182 if (state != NULL) {
183 // Restore the jvmti thread exception state.
184 if (_exception_detected) {
185 state->set_exception_detected();
186 }
187 if (_exception_caught) {
188 state->set_exception_caught();
189 }
190 }
191 }
192
193 #if 0
194 jobject to_jobject(oop obj) { return obj == NULL? NULL : _hblock->allocate_handle_fast(obj); }
195 #else
196 // we want to use the code above - but that needs the JNIHandle changes - later...
197 // for now, use regular make_local
198 jobject to_jobject(oop obj) { return JNIHandles::make_local(_thread,obj); }
199 #endif
200
201 jclass to_jclass(Klass* klass) { return (klass == NULL ? NULL : (jclass)to_jobject(klass->java_mirror())); }
202
203 jmethodID to_jmethodID(methodHandle method) { return method->jmethod_id(); }
204
205 JNIEnv* jni_env() { return _jni_env; }
206 };
207
208 class JvmtiThreadEventMark : public JvmtiEventMark {
209 private:
210 jthread _jt;
211
212 public:
213 JvmtiThreadEventMark(JavaThread *thread) :
214 JvmtiEventMark(thread) {
215 _jt = (jthread)(to_jobject(thread->threadObj()));
216 };
217 jthread jni_thread() { return _jt; }
218 };
219
220 class JvmtiClassEventMark : public JvmtiThreadEventMark {
221 private:
222 jclass _jc;
223
224 public:
225 JvmtiClassEventMark(JavaThread *thread, Klass* klass) :
226 JvmtiThreadEventMark(thread) {
227 _jc = to_jclass(klass);
228 };
229 jclass jni_class() { return _jc; }
230 };
231
232 class JvmtiMethodEventMark : public JvmtiThreadEventMark {
233 private:
234 jmethodID _mid;
235
236 public:
237 JvmtiMethodEventMark(JavaThread *thread, methodHandle method) :
238 JvmtiThreadEventMark(thread),
239 _mid(to_jmethodID(method)) {};
240 jmethodID jni_methodID() { return _mid; }
241 };
242
243 class JvmtiLocationEventMark : public JvmtiMethodEventMark {
244 private:
245 jlocation _loc;
246
247 public:
248 JvmtiLocationEventMark(JavaThread *thread, methodHandle method, address location) :
249 JvmtiMethodEventMark(thread, method),
250 _loc(location - method->code_base()) {};
251 jlocation location() { return _loc; }
252 };
253
254 class JvmtiExceptionEventMark : public JvmtiLocationEventMark {
255 private:
256 jobject _exc;
257
258 public:
259 JvmtiExceptionEventMark(JavaThread *thread, methodHandle method, address location, Handle exception) :
260 JvmtiLocationEventMark(thread, method, location),
261 _exc(to_jobject(exception())) {};
262 jobject exception() { return _exc; }
263 };
264
265 class JvmtiClassFileLoadEventMark : public JvmtiThreadEventMark {
266 private:
267 const char *_class_name;
268 jobject _jloader;
269 jobject _protection_domain;
270 jclass _class_being_redefined;
271
272 public:
273 JvmtiClassFileLoadEventMark(JavaThread *thread, Symbol* name,
274 Handle class_loader, Handle prot_domain, KlassHandle *class_being_redefined) : JvmtiThreadEventMark(thread) {
275 _class_name = name != NULL? name->as_utf8() : NULL;
276 _jloader = (jobject)to_jobject(class_loader());
277 _protection_domain = (jobject)to_jobject(prot_domain());
278 if (class_being_redefined == NULL) {
279 _class_being_redefined = NULL;
280 } else {
281 _class_being_redefined = (jclass)to_jclass((*class_being_redefined)());
282 }
283 };
284 const char *class_name() {
285 return _class_name;
286 }
287 jobject jloader() {
288 return _jloader;
289 }
290 jobject protection_domain() {
291 return _protection_domain;
292 }
293 jclass class_being_redefined() {
294 return _class_being_redefined;
295 }
296 };
297
298 //////////////////////////////////////////////////////////////////////////////
299
300 int JvmtiExport::_field_access_count = 0;
301 int JvmtiExport::_field_modification_count = 0;
302
303 bool JvmtiExport::_can_access_local_variables = false;
304 bool JvmtiExport::_can_hotswap_or_post_breakpoint = false;
305 bool JvmtiExport::_can_modify_any_class = false;
306 bool JvmtiExport::_can_walk_any_space = false;
307
308 bool JvmtiExport::_has_redefined_a_class = false;
309 bool JvmtiExport::_all_dependencies_are_recorded = false;
310
311 //
312 // field access management
313 //
314
315 // interpreter generator needs the address of the counter
316 address JvmtiExport::get_field_access_count_addr() {
317 // We don't grab a lock because we don't want to
318 // serialize field access between all threads. This means that a
319 // thread on another processor can see the wrong count value and
320 // may either miss making a needed call into post_field_access()
321 // or will make an unneeded call into post_field_access(). We pay
322 // this price to avoid slowing down the VM when we aren't watching
323 // field accesses.
324 // Other access/mutation safe by virtue of being in VM state.
325 return (address)(&_field_access_count);
326 }
327
328 //
329 // field modification management
330 //
331
332 // interpreter generator needs the address of the counter
333 address JvmtiExport::get_field_modification_count_addr() {
334 // We don't grab a lock because we don't
335 // want to serialize field modification between all threads. This
336 // means that a thread on another processor can see the wrong
337 // count value and may either miss making a needed call into
338 // post_field_modification() or will make an unneeded call into
339 // post_field_modification(). We pay this price to avoid slowing
340 // down the VM when we aren't watching field modifications.
341 // Other access/mutation safe by virtue of being in VM state.
342 return (address)(&_field_modification_count);
343 }
344
345
346 ///////////////////////////////////////////////////////////////
347 // Functions needed by java.lang.instrument for starting up javaagent.
348 ///////////////////////////////////////////////////////////////
349
350 jint
351 JvmtiExport::get_jvmti_interface(JavaVM *jvm, void **penv, jint version) {
352 // The JVMTI_VERSION_INTERFACE_JVMTI part of the version number
353 // has already been validated in JNI GetEnv().
354 int major, minor, micro;
355
356 // micro version doesn't matter here (yet?)
357 decode_version_values(version, &major, &minor, µ);
358 switch (major) {
359 case 1:
360 switch (minor) {
361 case 0: // version 1.0.<micro> is recognized
362 case 1: // version 1.1.<micro> is recognized
363 case 2: // version 1.2.<micro> is recognized
364 break;
365
366 default:
367 return JNI_EVERSION; // unsupported minor version number
368 }
369 break;
370 default:
371 return JNI_EVERSION; // unsupported major version number
372 }
373
374 if (JvmtiEnv::get_phase() == JVMTI_PHASE_LIVE) {
375 JavaThread* current_thread = (JavaThread*) ThreadLocalStorage::thread();
376 // transition code: native to VM
377 ThreadInVMfromNative __tiv(current_thread);
378 VM_ENTRY_BASE(jvmtiEnv*, JvmtiExport::get_jvmti_interface, current_thread)
379 debug_only(VMNativeEntryWrapper __vew;)
380
381 JvmtiEnv *jvmti_env = JvmtiEnv::create_a_jvmti(version);
382 *penv = jvmti_env->jvmti_external(); // actual type is jvmtiEnv* -- not to be confused with JvmtiEnv*
383 return JNI_OK;
384
385 } else if (JvmtiEnv::get_phase() == JVMTI_PHASE_ONLOAD) {
386 // not live, no thread to transition
387 JvmtiEnv *jvmti_env = JvmtiEnv::create_a_jvmti(version);
388 *penv = jvmti_env->jvmti_external(); // actual type is jvmtiEnv* -- not to be confused with JvmtiEnv*
389 return JNI_OK;
390
391 } else {
392 // Called at the wrong time
393 *penv = NULL;
394 return JNI_EDETACHED;
395 }
396 }
397
398
399 void
400 JvmtiExport::decode_version_values(jint version, int * major, int * minor,
401 int * micro) {
402 *major = (version & JVMTI_VERSION_MASK_MAJOR) >> JVMTI_VERSION_SHIFT_MAJOR;
403 *minor = (version & JVMTI_VERSION_MASK_MINOR) >> JVMTI_VERSION_SHIFT_MINOR;
404 *micro = (version & JVMTI_VERSION_MASK_MICRO) >> JVMTI_VERSION_SHIFT_MICRO;
405 }
406
407 void JvmtiExport::enter_primordial_phase() {
408 JvmtiEnvBase::set_phase(JVMTI_PHASE_PRIMORDIAL);
409 }
410
411 void JvmtiExport::enter_start_phase() {
412 JvmtiManageCapabilities::recompute_always_capabilities();
413 JvmtiEnvBase::set_phase(JVMTI_PHASE_START);
414 }
415
416 void JvmtiExport::enter_onload_phase() {
417 JvmtiEnvBase::set_phase(JVMTI_PHASE_ONLOAD);
418 }
419
420 void JvmtiExport::enter_live_phase() {
421 JvmtiEnvBase::set_phase(JVMTI_PHASE_LIVE);
422 }
423
424 //
425 // JVMTI events that the VM posts to the debugger and also startup agent
426 // and call the agent's premain() for java.lang.instrument.
427 //
428
429 void JvmtiExport::post_vm_start() {
430 EVT_TRIG_TRACE(JVMTI_EVENT_VM_START, ("JVMTI Trg VM start event triggered" ));
431
432 // can now enable some events
433 JvmtiEventController::vm_start();
434
435 JvmtiEnvIterator it;
436 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
437 if (env->is_enabled(JVMTI_EVENT_VM_START)) {
438 EVT_TRACE(JVMTI_EVENT_VM_START, ("JVMTI Evt VM start event sent" ));
439
440 JavaThread *thread = JavaThread::current();
441 JvmtiThreadEventMark jem(thread);
442 JvmtiJavaThreadEventTransition jet(thread);
443 jvmtiEventVMStart callback = env->callbacks()->VMStart;
444 if (callback != NULL) {
445 (*callback)(env->jvmti_external(), jem.jni_env());
446 }
447 }
448 }
449 }
450
451
452 void JvmtiExport::post_vm_initialized() {
453 EVT_TRIG_TRACE(JVMTI_EVENT_VM_INIT, ("JVMTI Trg VM init event triggered" ));
454
455 // can now enable events
456 JvmtiEventController::vm_init();
457
458 JvmtiEnvIterator it;
459 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
460 if (env->is_enabled(JVMTI_EVENT_VM_INIT)) {
461 EVT_TRACE(JVMTI_EVENT_VM_INIT, ("JVMTI Evt VM init event sent" ));
462
463 JavaThread *thread = JavaThread::current();
464 JvmtiThreadEventMark jem(thread);
465 JvmtiJavaThreadEventTransition jet(thread);
466 jvmtiEventVMInit callback = env->callbacks()->VMInit;
467 if (callback != NULL) {
468 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread());
469 }
470 }
471 }
472 }
473
474
475 void JvmtiExport::post_vm_death() {
476 EVT_TRIG_TRACE(JVMTI_EVENT_VM_DEATH, ("JVMTI Trg VM death event triggered" ));
477
478 JvmtiEnvIterator it;
479 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
480 if (env->is_enabled(JVMTI_EVENT_VM_DEATH)) {
481 EVT_TRACE(JVMTI_EVENT_VM_DEATH, ("JVMTI Evt VM death event sent" ));
482
483 JavaThread *thread = JavaThread::current();
484 JvmtiEventMark jem(thread);
485 JvmtiJavaThreadEventTransition jet(thread);
486 jvmtiEventVMDeath callback = env->callbacks()->VMDeath;
487 if (callback != NULL) {
488 (*callback)(env->jvmti_external(), jem.jni_env());
489 }
490 }
491 }
492
493 JvmtiEnvBase::set_phase(JVMTI_PHASE_DEAD);
494 JvmtiEventController::vm_death();
495 }
496
497 char**
498 JvmtiExport::get_all_native_method_prefixes(int* count_ptr) {
499 // Have to grab JVMTI thread state lock to be sure environment doesn't
500 // go away while we iterate them. No locks during VM bring-up.
501 if (Threads::number_of_threads() == 0 || SafepointSynchronize::is_at_safepoint()) {
502 return JvmtiEnvBase::get_all_native_method_prefixes(count_ptr);
503 } else {
504 MutexLocker mu(JvmtiThreadState_lock);
505 return JvmtiEnvBase::get_all_native_method_prefixes(count_ptr);
506 }
507 }
508
509 class JvmtiClassFileLoadHookPoster : public StackObj {
510 private:
511 Symbol* _h_name;
512 Handle _class_loader;
513 Handle _h_protection_domain;
514 unsigned char ** _data_ptr;
515 unsigned char ** _end_ptr;
516 JavaThread * _thread;
517 jint _curr_len;
518 unsigned char * _curr_data;
519 JvmtiEnv * _curr_env;
520 JvmtiCachedClassFileData ** _cached_class_file_ptr;
521 JvmtiThreadState * _state;
522 KlassHandle * _h_class_being_redefined;
523 JvmtiClassLoadKind _load_kind;
524
525 public:
526 inline JvmtiClassFileLoadHookPoster(Symbol* h_name, Handle class_loader,
527 Handle h_protection_domain,
528 unsigned char **data_ptr, unsigned char **end_ptr,
529 JvmtiCachedClassFileData **cache_ptr) {
530 _h_name = h_name;
531 _class_loader = class_loader;
532 _h_protection_domain = h_protection_domain;
533 _data_ptr = data_ptr;
534 _end_ptr = end_ptr;
535 _thread = JavaThread::current();
536 _curr_len = *end_ptr - *data_ptr;
537 _curr_data = *data_ptr;
538 _curr_env = NULL;
539 _cached_class_file_ptr = cache_ptr;
540
541 _state = _thread->jvmti_thread_state();
542 if (_state != NULL) {
543 _h_class_being_redefined = _state->get_class_being_redefined();
544 _load_kind = _state->get_class_load_kind();
545 // Clear class_being_redefined flag here. The action
546 // from agent handler could generate a new class file load
547 // hook event and if it is not cleared the new event generated
548 // from regular class file load could have this stale redefined
549 // class handle info.
550 _state->clear_class_being_redefined();
551 } else {
552 // redefine and retransform will always set the thread state
553 _h_class_being_redefined = (KlassHandle *) NULL;
554 _load_kind = jvmti_class_load_kind_load;
555 }
556 }
557
558 void post() {
559 // EVT_TRIG_TRACE(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK,
560 // ("JVMTI [%s] class file load hook event triggered",
561 // JvmtiTrace::safe_get_thread_name(_thread)));
562 post_all_envs();
563 copy_modified_data();
564 }
565
566 private:
567 void post_all_envs() {
568 if (_load_kind != jvmti_class_load_kind_retransform) {
569 // for class load and redefine,
570 // call the non-retransformable agents
571 JvmtiEnvIterator it;
572 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
573 if (!env->is_retransformable() && env->is_enabled(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK)) {
574 // non-retransformable agents cannot retransform back,
575 // so no need to cache the original class file bytes
576 post_to_env(env, false);
577 }
578 }
579 }
580 JvmtiEnvIterator it;
581 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
582 // retransformable agents get all events
583 if (env->is_retransformable() && env->is_enabled(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK)) {
584 // retransformable agents need to cache the original class file
585 // bytes if changes are made via the ClassFileLoadHook
586 post_to_env(env, true);
587 }
588 }
589 }
590
591 void post_to_env(JvmtiEnv* env, bool caching_needed) {
592 unsigned char *new_data = NULL;
593 jint new_len = 0;
594 // EVT_TRACE(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK,
595 // ("JVMTI [%s] class file load hook event sent %s data_ptr = %d, data_len = %d",
596 // JvmtiTrace::safe_get_thread_name(_thread),
597 // _h_name == NULL ? "NULL" : _h_name->as_utf8(),
598 // _curr_data, _curr_len ));
599 JvmtiClassFileLoadEventMark jem(_thread, _h_name, _class_loader,
600 _h_protection_domain,
601 _h_class_being_redefined);
602 JvmtiJavaThreadEventTransition jet(_thread);
603 JNIEnv* jni_env = (JvmtiEnv::get_phase() == JVMTI_PHASE_PRIMORDIAL)?
604 NULL : jem.jni_env();
605 jvmtiEventClassFileLoadHook callback = env->callbacks()->ClassFileLoadHook;
606 if (callback != NULL) {
607 (*callback)(env->jvmti_external(), jni_env,
608 jem.class_being_redefined(),
609 jem.jloader(), jem.class_name(),
610 jem.protection_domain(),
611 _curr_len, _curr_data,
612 &new_len, &new_data);
613 }
614 if (new_data != NULL) {
615 // this agent has modified class data.
616 if (caching_needed && *_cached_class_file_ptr == NULL) {
617 // data has been changed by the new retransformable agent
618 // and it hasn't already been cached, cache it
619 JvmtiCachedClassFileData *p;
620 p = (JvmtiCachedClassFileData *)os::malloc(
621 offset_of(JvmtiCachedClassFileData, data) + _curr_len, mtInternal);
622 if (p == NULL) {
623 vm_exit_out_of_memory(offset_of(JvmtiCachedClassFileData, data) + _curr_len,
624 OOM_MALLOC_ERROR,
625 "unable to allocate cached copy of original class bytes");
626 }
627 p->length = _curr_len;
628 memcpy(p->data, _curr_data, _curr_len);
629 *_cached_class_file_ptr = p;
630 }
631
632 if (_curr_data != *_data_ptr) {
633 // curr_data is previous agent modified class data.
634 // And this has been changed by the new agent so
635 // we can delete it now.
636 _curr_env->Deallocate(_curr_data);
637 }
638
639 // Class file data has changed by the current agent.
640 _curr_data = new_data;
641 _curr_len = new_len;
642 // Save the current agent env we need this to deallocate the
643 // memory allocated by this agent.
644 _curr_env = env;
645 }
646 }
647
648 void copy_modified_data() {
649 // if one of the agent has modified class file data.
650 // Copy modified class data to new resources array.
651 if (_curr_data != *_data_ptr) {
652 *_data_ptr = NEW_RESOURCE_ARRAY(u1, _curr_len);
653 memcpy(*_data_ptr, _curr_data, _curr_len);
654 *_end_ptr = *_data_ptr + _curr_len;
655 _curr_env->Deallocate(_curr_data);
656 }
657 }
658 };
659
660 bool JvmtiExport::_should_post_class_file_load_hook = false;
661
662 // this entry is for class file load hook on class load, redefine and retransform
663 void JvmtiExport::post_class_file_load_hook(Symbol* h_name,
664 Handle class_loader,
665 Handle h_protection_domain,
666 unsigned char **data_ptr,
667 unsigned char **end_ptr,
668 JvmtiCachedClassFileData **cache_ptr) {
669 JvmtiClassFileLoadHookPoster poster(h_name, class_loader,
670 h_protection_domain,
671 data_ptr, end_ptr,
672 cache_ptr);
673 poster.post();
674 }
675
676 void JvmtiExport::report_unsupported(bool on) {
677 // If any JVMTI service is turned on, we need to exit before native code
678 // tries to access nonexistant services.
679 if (on) {
680 vm_exit_during_initialization("Java Kernel does not support JVMTI.");
681 }
682 }
683
684
685 static inline Klass* oop_to_klass(oop obj) {
686 Klass* k = obj->klass();
687
688 // if the object is a java.lang.Class then return the java mirror
689 if (k == SystemDictionary::Class_klass()) {
690 if (!java_lang_Class::is_primitive(obj)) {
691 k = java_lang_Class::as_Klass(obj);
692 assert(k != NULL, "class for non-primitive mirror must exist");
693 }
694 }
695 return k;
696 }
697
698 class JvmtiVMObjectAllocEventMark : public JvmtiClassEventMark {
699 private:
700 jobject _jobj;
701 jlong _size;
702 public:
703 JvmtiVMObjectAllocEventMark(JavaThread *thread, oop obj) : JvmtiClassEventMark(thread, oop_to_klass(obj)) {
704 _jobj = (jobject)to_jobject(obj);
705 _size = obj->size() * wordSize;
706 };
707 jobject jni_jobject() { return _jobj; }
708 jlong size() { return _size; }
709 };
710
711 class JvmtiCompiledMethodLoadEventMark : public JvmtiMethodEventMark {
712 private:
713 jint _code_size;
714 const void *_code_data;
715 jint _map_length;
716 jvmtiAddrLocationMap *_map;
717 const void *_compile_info;
718 public:
719 JvmtiCompiledMethodLoadEventMark(JavaThread *thread, nmethod *nm, void* compile_info_ptr = NULL)
720 : JvmtiMethodEventMark(thread,methodHandle(thread, nm->method())) {
721 _code_data = nm->insts_begin();
722 _code_size = nm->insts_size();
723 _compile_info = compile_info_ptr; // Set void pointer of compiledMethodLoad Event. Default value is NULL.
724 JvmtiCodeBlobEvents::build_jvmti_addr_location_map(nm, &_map, &_map_length);
725 }
726 ~JvmtiCompiledMethodLoadEventMark() {
727 FREE_C_HEAP_ARRAY(jvmtiAddrLocationMap, _map, mtInternal);
728 }
729
730 jint code_size() { return _code_size; }
731 const void *code_data() { return _code_data; }
732 jint map_length() { return _map_length; }
733 const jvmtiAddrLocationMap* map() { return _map; }
734 const void *compile_info() { return _compile_info; }
735 };
736
737
738
739 class JvmtiMonitorEventMark : public JvmtiThreadEventMark {
740 private:
741 jobject _jobj;
742 public:
743 JvmtiMonitorEventMark(JavaThread *thread, oop object)
744 : JvmtiThreadEventMark(thread){
745 _jobj = to_jobject(object);
746 }
747 jobject jni_object() { return _jobj; }
748 };
749
750 ///////////////////////////////////////////////////////////////
751 //
752 // pending CompiledMethodUnload support
753 //
754
755 void JvmtiExport::post_compiled_method_unload(
756 jmethodID method, const void *code_begin) {
757 JavaThread* thread = JavaThread::current();
758 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_UNLOAD,
759 ("JVMTI [%s] method compile unload event triggered",
760 JvmtiTrace::safe_get_thread_name(thread)));
761
762 // post the event for each environment that has this event enabled.
763 JvmtiEnvIterator it;
764 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
765 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_UNLOAD)) {
766
767 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_UNLOAD,
768 ("JVMTI [%s] class compile method unload event sent jmethodID " PTR_FORMAT,
769 JvmtiTrace::safe_get_thread_name(thread), method));
770
771 ResourceMark rm(thread);
772
773 JvmtiEventMark jem(thread);
774 JvmtiJavaThreadEventTransition jet(thread);
775 jvmtiEventCompiledMethodUnload callback = env->callbacks()->CompiledMethodUnload;
776 if (callback != NULL) {
777 (*callback)(env->jvmti_external(), method, code_begin);
778 }
779 }
780 }
781 }
782
783 ///////////////////////////////////////////////////////////////
784 //
785 // JvmtiExport
786 //
787
788 void JvmtiExport::post_raw_breakpoint(JavaThread *thread, Method* method, address location) {
789 HandleMark hm(thread);
790 methodHandle mh(thread, method);
791
792 JvmtiThreadState *state = thread->jvmti_thread_state();
793 if (state == NULL) {
794 return;
795 }
796 EVT_TRIG_TRACE(JVMTI_EVENT_BREAKPOINT, ("JVMTI [%s] Trg Breakpoint triggered",
797 JvmtiTrace::safe_get_thread_name(thread)));
798 JvmtiEnvThreadStateIterator it(state);
799 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
800 ets->compare_and_set_current_location(mh(), location, JVMTI_EVENT_BREAKPOINT);
801 if (!ets->breakpoint_posted() && ets->is_enabled(JVMTI_EVENT_BREAKPOINT)) {
802 ThreadState old_os_state = thread->osthread()->get_state();
803 thread->osthread()->set_state(BREAKPOINTED);
804 EVT_TRACE(JVMTI_EVENT_BREAKPOINT, ("JVMTI [%s] Evt Breakpoint sent %s.%s @ %d",
805 JvmtiTrace::safe_get_thread_name(thread),
806 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
807 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
808 location - mh()->code_base() ));
809
810 JvmtiEnv *env = ets->get_env();
811 JvmtiLocationEventMark jem(thread, mh, location);
812 JvmtiJavaThreadEventTransition jet(thread);
813 jvmtiEventBreakpoint callback = env->callbacks()->Breakpoint;
814 if (callback != NULL) {
815 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
816 jem.jni_methodID(), jem.location());
817 }
818
819 ets->set_breakpoint_posted();
820 thread->osthread()->set_state(old_os_state);
821 }
822 }
823 }
824
825 //////////////////////////////////////////////////////////////////////////////
826
827 bool JvmtiExport::_can_get_source_debug_extension = false;
828 bool JvmtiExport::_can_maintain_original_method_order = false;
829 bool JvmtiExport::_can_post_interpreter_events = false;
830 bool JvmtiExport::_can_post_on_exceptions = false;
831 bool JvmtiExport::_can_post_breakpoint = false;
832 bool JvmtiExport::_can_post_field_access = false;
833 bool JvmtiExport::_can_post_field_modification = false;
834 bool JvmtiExport::_can_post_method_entry = false;
835 bool JvmtiExport::_can_post_method_exit = false;
836 bool JvmtiExport::_can_pop_frame = false;
837 bool JvmtiExport::_can_force_early_return = false;
838
839 bool JvmtiExport::_should_post_single_step = false;
840 bool JvmtiExport::_should_post_field_access = false;
841 bool JvmtiExport::_should_post_field_modification = false;
842 bool JvmtiExport::_should_post_class_load = false;
843 bool JvmtiExport::_should_post_class_prepare = false;
844 bool JvmtiExport::_should_post_class_unload = false;
845 bool JvmtiExport::_should_post_thread_life = false;
846 bool JvmtiExport::_should_clean_up_heap_objects = false;
847 bool JvmtiExport::_should_post_native_method_bind = false;
848 bool JvmtiExport::_should_post_dynamic_code_generated = false;
849 bool JvmtiExport::_should_post_data_dump = false;
850 bool JvmtiExport::_should_post_compiled_method_load = false;
851 bool JvmtiExport::_should_post_compiled_method_unload = false;
852 bool JvmtiExport::_should_post_monitor_contended_enter = false;
853 bool JvmtiExport::_should_post_monitor_contended_entered = false;
854 bool JvmtiExport::_should_post_monitor_wait = false;
855 bool JvmtiExport::_should_post_monitor_waited = false;
856 bool JvmtiExport::_should_post_garbage_collection_start = false;
857 bool JvmtiExport::_should_post_garbage_collection_finish = false;
858 bool JvmtiExport::_should_post_object_free = false;
859 bool JvmtiExport::_should_post_resource_exhausted = false;
860 bool JvmtiExport::_should_post_vm_object_alloc = false;
861 bool JvmtiExport::_should_post_on_exceptions = false;
862
863 ////////////////////////////////////////////////////////////////////////////////////////////////
864
865
866 //
867 // JVMTI single step management
868 //
869 void JvmtiExport::at_single_stepping_point(JavaThread *thread, Method* method, address location) {
870 assert(JvmtiExport::should_post_single_step(), "must be single stepping");
871
872 HandleMark hm(thread);
873 methodHandle mh(thread, method);
874
875 // update information about current location and post a step event
876 JvmtiThreadState *state = thread->jvmti_thread_state();
877 if (state == NULL) {
878 return;
879 }
880 EVT_TRIG_TRACE(JVMTI_EVENT_SINGLE_STEP, ("JVMTI [%s] Trg Single Step triggered",
881 JvmtiTrace::safe_get_thread_name(thread)));
882 if (!state->hide_single_stepping()) {
883 if (state->is_pending_step_for_popframe()) {
884 state->process_pending_step_for_popframe();
885 }
886 if (state->is_pending_step_for_earlyret()) {
887 state->process_pending_step_for_earlyret();
888 }
889 JvmtiExport::post_single_step(thread, mh(), location);
890 }
891 }
892
893
894 void JvmtiExport::expose_single_stepping(JavaThread *thread) {
895 JvmtiThreadState *state = thread->jvmti_thread_state();
896 if (state != NULL) {
897 state->clear_hide_single_stepping();
898 }
899 }
900
901
902 bool JvmtiExport::hide_single_stepping(JavaThread *thread) {
903 JvmtiThreadState *state = thread->jvmti_thread_state();
904 if (state != NULL && state->is_enabled(JVMTI_EVENT_SINGLE_STEP)) {
905 state->set_hide_single_stepping();
906 return true;
907 } else {
908 return false;
909 }
910 }
911
912 void JvmtiExport::post_class_load(JavaThread *thread, Klass* klass) {
913 HandleMark hm(thread);
914 KlassHandle kh(thread, klass);
915
916 EVT_TRIG_TRACE(JVMTI_EVENT_CLASS_LOAD, ("JVMTI [%s] Trg Class Load triggered",
917 JvmtiTrace::safe_get_thread_name(thread)));
918 JvmtiThreadState* state = thread->jvmti_thread_state();
919 if (state == NULL) {
920 return;
921 }
922 JvmtiEnvThreadStateIterator it(state);
923 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
924 if (ets->is_enabled(JVMTI_EVENT_CLASS_LOAD)) {
925 EVT_TRACE(JVMTI_EVENT_CLASS_LOAD, ("JVMTI [%s] Evt Class Load sent %s",
926 JvmtiTrace::safe_get_thread_name(thread),
927 kh()==NULL? "NULL" : kh()->external_name() ));
928
929 JvmtiEnv *env = ets->get_env();
930 JvmtiClassEventMark jem(thread, kh());
931 JvmtiJavaThreadEventTransition jet(thread);
932 jvmtiEventClassLoad callback = env->callbacks()->ClassLoad;
933 if (callback != NULL) {
934 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_class());
935 }
936 }
937 }
938 }
939
940
941 void JvmtiExport::post_class_prepare(JavaThread *thread, Klass* klass) {
942 HandleMark hm(thread);
943 KlassHandle kh(thread, klass);
944
945 EVT_TRIG_TRACE(JVMTI_EVENT_CLASS_PREPARE, ("JVMTI [%s] Trg Class Prepare triggered",
946 JvmtiTrace::safe_get_thread_name(thread)));
947 JvmtiThreadState* state = thread->jvmti_thread_state();
948 if (state == NULL) {
949 return;
950 }
951 JvmtiEnvThreadStateIterator it(state);
952 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
953 if (ets->is_enabled(JVMTI_EVENT_CLASS_PREPARE)) {
954 EVT_TRACE(JVMTI_EVENT_CLASS_PREPARE, ("JVMTI [%s] Evt Class Prepare sent %s",
955 JvmtiTrace::safe_get_thread_name(thread),
956 kh()==NULL? "NULL" : kh()->external_name() ));
957
958 JvmtiEnv *env = ets->get_env();
959 JvmtiClassEventMark jem(thread, kh());
960 JvmtiJavaThreadEventTransition jet(thread);
961 jvmtiEventClassPrepare callback = env->callbacks()->ClassPrepare;
962 if (callback != NULL) {
963 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_class());
964 }
965 }
966 }
967 }
968
969 void JvmtiExport::post_class_unload(Klass* klass) {
970 Thread *thread = Thread::current();
971 HandleMark hm(thread);
972 KlassHandle kh(thread, klass);
973
974 EVT_TRIG_TRACE(EXT_EVENT_CLASS_UNLOAD, ("JVMTI [?] Trg Class Unload triggered" ));
975 if (JvmtiEventController::is_enabled((jvmtiEvent)EXT_EVENT_CLASS_UNLOAD)) {
976 assert(thread->is_VM_thread(), "wrong thread");
977
978 // get JavaThread for whom we are proxy
979 JavaThread *real_thread =
980 (JavaThread *)((VMThread *)thread)->vm_operation()->calling_thread();
981
982 JvmtiEnvIterator it;
983 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
984 if (env->is_enabled((jvmtiEvent)EXT_EVENT_CLASS_UNLOAD)) {
985 EVT_TRACE(EXT_EVENT_CLASS_UNLOAD, ("JVMTI [?] Evt Class Unload sent %s",
986 kh()==NULL? "NULL" : kh()->external_name() ));
987
988 // do everything manually, since this is a proxy - needs special care
989 JNIEnv* jni_env = real_thread->jni_environment();
990 jthread jt = (jthread)JNIHandles::make_local(real_thread, real_thread->threadObj());
991 jclass jk = (jclass)JNIHandles::make_local(real_thread, kh()->java_mirror());
992
993 // Before we call the JVMTI agent, we have to set the state in the
994 // thread for which we are proxying.
995 JavaThreadState prev_state = real_thread->thread_state();
996 assert(prev_state == _thread_blocked, "JavaThread should be at safepoint");
997 real_thread->set_thread_state(_thread_in_native);
998
999 jvmtiExtensionEvent callback = env->ext_callbacks()->ClassUnload;
1000 if (callback != NULL) {
1001 (*callback)(env->jvmti_external(), jni_env, jt, jk);
1002 }
1003
1004 assert(real_thread->thread_state() == _thread_in_native,
1005 "JavaThread should be in native");
1006 real_thread->set_thread_state(prev_state);
1007
1008 JNIHandles::destroy_local(jk);
1009 JNIHandles::destroy_local(jt);
1010 }
1011 }
1012 }
1013 }
1014
1015
1016 void JvmtiExport::post_thread_start(JavaThread *thread) {
1017 assert(thread->thread_state() == _thread_in_vm, "must be in vm state");
1018
1019 EVT_TRIG_TRACE(JVMTI_EVENT_THREAD_START, ("JVMTI [%s] Trg Thread Start event triggered",
1020 JvmtiTrace::safe_get_thread_name(thread)));
1021
1022 // do JVMTI thread initialization (if needed)
1023 JvmtiEventController::thread_started(thread);
1024
1025 // Do not post thread start event for hidden java thread.
1026 if (JvmtiEventController::is_enabled(JVMTI_EVENT_THREAD_START) &&
1027 !thread->is_hidden_from_external_view()) {
1028 JvmtiEnvIterator it;
1029 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1030 if (env->is_enabled(JVMTI_EVENT_THREAD_START)) {
1031 EVT_TRACE(JVMTI_EVENT_THREAD_START, ("JVMTI [%s] Evt Thread Start event sent",
1032 JvmtiTrace::safe_get_thread_name(thread) ));
1033
1034 JvmtiThreadEventMark jem(thread);
1035 JvmtiJavaThreadEventTransition jet(thread);
1036 jvmtiEventThreadStart callback = env->callbacks()->ThreadStart;
1037 if (callback != NULL) {
1038 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread());
1039 }
1040 }
1041 }
1042 }
1043 }
1044
1045
1046 void JvmtiExport::post_thread_end(JavaThread *thread) {
1047 EVT_TRIG_TRACE(JVMTI_EVENT_THREAD_END, ("JVMTI [%s] Trg Thread End event triggered",
1048 JvmtiTrace::safe_get_thread_name(thread)));
1049
1050 JvmtiThreadState *state = thread->jvmti_thread_state();
1051 if (state == NULL) {
1052 return;
1053 }
1054
1055 // Do not post thread end event for hidden java thread.
1056 if (state->is_enabled(JVMTI_EVENT_THREAD_END) &&
1057 !thread->is_hidden_from_external_view()) {
1058
1059 JvmtiEnvThreadStateIterator it(state);
1060 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1061 if (ets->is_enabled(JVMTI_EVENT_THREAD_END)) {
1062 EVT_TRACE(JVMTI_EVENT_THREAD_END, ("JVMTI [%s] Evt Thread End event sent",
1063 JvmtiTrace::safe_get_thread_name(thread) ));
1064
1065 JvmtiEnv *env = ets->get_env();
1066 JvmtiThreadEventMark jem(thread);
1067 JvmtiJavaThreadEventTransition jet(thread);
1068 jvmtiEventThreadEnd callback = env->callbacks()->ThreadEnd;
1069 if (callback != NULL) {
1070 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread());
1071 }
1072 }
1073 }
1074 }
1075 }
1076
1077 void JvmtiExport::post_object_free(JvmtiEnv* env, jlong tag) {
1078 assert(SafepointSynchronize::is_at_safepoint(), "must be executed at safepoint");
1079 assert(env->is_enabled(JVMTI_EVENT_OBJECT_FREE), "checking");
1080
1081 EVT_TRIG_TRACE(JVMTI_EVENT_OBJECT_FREE, ("JVMTI [?] Trg Object Free triggered" ));
1082 EVT_TRACE(JVMTI_EVENT_OBJECT_FREE, ("JVMTI [?] Evt Object Free sent"));
1083
1084 jvmtiEventObjectFree callback = env->callbacks()->ObjectFree;
1085 if (callback != NULL) {
1086 (*callback)(env->jvmti_external(), tag);
1087 }
1088 }
1089
1090 void JvmtiExport::post_resource_exhausted(jint resource_exhausted_flags, const char* description) {
1091 EVT_TRIG_TRACE(JVMTI_EVENT_RESOURCE_EXHAUSTED, ("JVMTI Trg resource exhausted event triggered" ));
1092
1093 JvmtiEnvIterator it;
1094 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1095 if (env->is_enabled(JVMTI_EVENT_RESOURCE_EXHAUSTED)) {
1096 EVT_TRACE(JVMTI_EVENT_RESOURCE_EXHAUSTED, ("JVMTI Evt resource exhausted event sent" ));
1097
1098 JavaThread *thread = JavaThread::current();
1099 JvmtiThreadEventMark jem(thread);
1100 JvmtiJavaThreadEventTransition jet(thread);
1101 jvmtiEventResourceExhausted callback = env->callbacks()->ResourceExhausted;
1102 if (callback != NULL) {
1103 (*callback)(env->jvmti_external(), jem.jni_env(),
1104 resource_exhausted_flags, NULL, description);
1105 }
1106 }
1107 }
1108 }
1109
1110 void JvmtiExport::post_method_entry(JavaThread *thread, Method* method, frame current_frame) {
1111 HandleMark hm(thread);
1112 methodHandle mh(thread, method);
1113
1114 EVT_TRIG_TRACE(JVMTI_EVENT_METHOD_ENTRY, ("JVMTI [%s] Trg Method Entry triggered %s.%s",
1115 JvmtiTrace::safe_get_thread_name(thread),
1116 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1117 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1118
1119 JvmtiThreadState* state = thread->jvmti_thread_state();
1120 if (state == NULL || !state->is_interp_only_mode()) {
1121 // for any thread that actually wants method entry, interp_only_mode is set
1122 return;
1123 }
1124
1125 state->incr_cur_stack_depth();
1126
1127 if (state->is_enabled(JVMTI_EVENT_METHOD_ENTRY)) {
1128 JvmtiEnvThreadStateIterator it(state);
1129 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1130 if (ets->is_enabled(JVMTI_EVENT_METHOD_ENTRY)) {
1131 EVT_TRACE(JVMTI_EVENT_METHOD_ENTRY, ("JVMTI [%s] Evt Method Entry sent %s.%s",
1132 JvmtiTrace::safe_get_thread_name(thread),
1133 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1134 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1135
1136 JvmtiEnv *env = ets->get_env();
1137 JvmtiMethodEventMark jem(thread, mh);
1138 JvmtiJavaThreadEventTransition jet(thread);
1139 jvmtiEventMethodEntry callback = env->callbacks()->MethodEntry;
1140 if (callback != NULL) {
1141 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_methodID());
1142 }
1143 }
1144 }
1145 }
1146 }
1147
1148 void JvmtiExport::post_method_exit(JavaThread *thread, Method* method, frame current_frame) {
1149 HandleMark hm(thread);
1150 methodHandle mh(thread, method);
1151
1152 EVT_TRIG_TRACE(JVMTI_EVENT_METHOD_EXIT, ("JVMTI [%s] Trg Method Exit triggered %s.%s",
1153 JvmtiTrace::safe_get_thread_name(thread),
1154 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1155 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1156
1157 JvmtiThreadState *state = thread->jvmti_thread_state();
1158 if (state == NULL || !state->is_interp_only_mode()) {
1159 // for any thread that actually wants method exit, interp_only_mode is set
1160 return;
1161 }
1162
1163 // return a flag when a method terminates by throwing an exception
1164 // i.e. if an exception is thrown and it's not caught by the current method
1165 bool exception_exit = state->is_exception_detected() && !state->is_exception_caught();
1166
1167
1168 if (state->is_enabled(JVMTI_EVENT_METHOD_EXIT)) {
1169 Handle result;
1170 jvalue value;
1171 value.j = 0L;
1172
1173 // if the method hasn't been popped because of an exception then we populate
1174 // the return_value parameter for the callback. At this point we only have
1175 // the address of a "raw result" and we just call into the interpreter to
1176 // convert this into a jvalue.
1177 if (!exception_exit) {
1178 oop oop_result;
1179 BasicType type = current_frame.interpreter_frame_result(&oop_result, &value);
1180 if (type == T_OBJECT || type == T_ARRAY) {
1181 result = Handle(thread, oop_result);
1182 }
1183 }
1184
1185 JvmtiEnvThreadStateIterator it(state);
1186 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1187 if (ets->is_enabled(JVMTI_EVENT_METHOD_EXIT)) {
1188 EVT_TRACE(JVMTI_EVENT_METHOD_EXIT, ("JVMTI [%s] Evt Method Exit sent %s.%s",
1189 JvmtiTrace::safe_get_thread_name(thread),
1190 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1191 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1192
1193 JvmtiEnv *env = ets->get_env();
1194 JvmtiMethodEventMark jem(thread, mh);
1195 if (result.not_null()) {
1196 value.l = JNIHandles::make_local(thread, result());
1197 }
1198 JvmtiJavaThreadEventTransition jet(thread);
1199 jvmtiEventMethodExit callback = env->callbacks()->MethodExit;
1200 if (callback != NULL) {
1201 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1202 jem.jni_methodID(), exception_exit, value);
1203 }
1204 }
1205 }
1206 }
1207
1208 if (state->is_enabled(JVMTI_EVENT_FRAME_POP)) {
1209 JvmtiEnvThreadStateIterator it(state);
1210 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1211 int cur_frame_number = state->cur_stack_depth();
1212
1213 if (ets->is_frame_pop(cur_frame_number)) {
1214 // we have a NotifyFramePop entry for this frame.
1215 // now check that this env/thread wants this event
1216 if (ets->is_enabled(JVMTI_EVENT_FRAME_POP)) {
1217 EVT_TRACE(JVMTI_EVENT_FRAME_POP, ("JVMTI [%s] Evt Frame Pop sent %s.%s",
1218 JvmtiTrace::safe_get_thread_name(thread),
1219 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1220 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1221
1222 // we also need to issue a frame pop event for this frame
1223 JvmtiEnv *env = ets->get_env();
1224 JvmtiMethodEventMark jem(thread, mh);
1225 JvmtiJavaThreadEventTransition jet(thread);
1226 jvmtiEventFramePop callback = env->callbacks()->FramePop;
1227 if (callback != NULL) {
1228 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1229 jem.jni_methodID(), exception_exit);
1230 }
1231 }
1232 // remove the frame's entry
1233 ets->clear_frame_pop(cur_frame_number);
1234 }
1235 }
1236 }
1237
1238 state->decr_cur_stack_depth();
1239 }
1240
1241
1242 // Todo: inline this for optimization
1243 void JvmtiExport::post_single_step(JavaThread *thread, Method* method, address location) {
1244 HandleMark hm(thread);
1245 methodHandle mh(thread, method);
1246
1247 JvmtiThreadState *state = thread->jvmti_thread_state();
1248 if (state == NULL) {
1249 return;
1250 }
1251 JvmtiEnvThreadStateIterator it(state);
1252 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1253 ets->compare_and_set_current_location(mh(), location, JVMTI_EVENT_SINGLE_STEP);
1254 if (!ets->single_stepping_posted() && ets->is_enabled(JVMTI_EVENT_SINGLE_STEP)) {
1255 EVT_TRACE(JVMTI_EVENT_SINGLE_STEP, ("JVMTI [%s] Evt Single Step sent %s.%s @ %d",
1256 JvmtiTrace::safe_get_thread_name(thread),
1257 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1258 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1259 location - mh()->code_base() ));
1260
1261 JvmtiEnv *env = ets->get_env();
1262 JvmtiLocationEventMark jem(thread, mh, location);
1263 JvmtiJavaThreadEventTransition jet(thread);
1264 jvmtiEventSingleStep callback = env->callbacks()->SingleStep;
1265 if (callback != NULL) {
1266 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1267 jem.jni_methodID(), jem.location());
1268 }
1269
1270 ets->set_single_stepping_posted();
1271 }
1272 }
1273 }
1274
1275
1276 void JvmtiExport::post_exception_throw(JavaThread *thread, Method* method, address location, oop exception) {
1277 HandleMark hm(thread);
1278 methodHandle mh(thread, method);
1279 Handle exception_handle(thread, exception);
1280
1281 JvmtiThreadState *state = thread->jvmti_thread_state();
1282 if (state == NULL) {
1283 return;
1284 }
1285
1286 EVT_TRIG_TRACE(JVMTI_EVENT_EXCEPTION, ("JVMTI [%s] Trg Exception thrown triggered",
1287 JvmtiTrace::safe_get_thread_name(thread)));
1288 if (!state->is_exception_detected()) {
1289 state->set_exception_detected();
1290 JvmtiEnvThreadStateIterator it(state);
1291 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1292 if (ets->is_enabled(JVMTI_EVENT_EXCEPTION) && (exception != NULL)) {
1293
1294 EVT_TRACE(JVMTI_EVENT_EXCEPTION,
1295 ("JVMTI [%s] Evt Exception thrown sent %s.%s @ %d",
1296 JvmtiTrace::safe_get_thread_name(thread),
1297 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1298 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1299 location - mh()->code_base() ));
1300
1301 JvmtiEnv *env = ets->get_env();
1302 JvmtiExceptionEventMark jem(thread, mh, location, exception_handle);
1303
1304 // It's okay to clear these exceptions here because we duplicate
1305 // this lookup in InterpreterRuntime::exception_handler_for_exception.
1306 EXCEPTION_MARK;
1307
1308 bool should_repeat;
1309 vframeStream st(thread);
1310 assert(!st.at_end(), "cannot be at end");
1311 Method* current_method = NULL;
1312 // A GC may occur during the Method::fast_exception_handler_bci_for()
1313 // call below if it needs to load the constraint class. Using a
1314 // methodHandle to keep the 'current_method' from being deallocated
1315 // if GC happens.
1316 methodHandle current_mh = methodHandle(thread, current_method);
1317 int current_bci = -1;
1318 do {
1319 current_method = st.method();
1320 current_mh = methodHandle(thread, current_method);
1321 current_bci = st.bci();
1322 do {
1323 should_repeat = false;
1324 KlassHandle eh_klass(thread, exception_handle()->klass());
1325 current_bci = Method::fast_exception_handler_bci_for(
1326 current_mh, eh_klass, current_bci, THREAD);
1327 if (HAS_PENDING_EXCEPTION) {
1328 exception_handle = Handle(thread, PENDING_EXCEPTION);
1329 CLEAR_PENDING_EXCEPTION;
1330 should_repeat = true;
1331 }
1332 } while (should_repeat && (current_bci != -1));
1333 st.next();
1334 } while ((current_bci < 0) && (!st.at_end()));
1335
1336 jmethodID catch_jmethodID;
1337 if (current_bci < 0) {
1338 catch_jmethodID = 0;
1339 current_bci = 0;
1340 } else {
1341 catch_jmethodID = jem.to_jmethodID(current_mh);
1342 }
1343
1344 JvmtiJavaThreadEventTransition jet(thread);
1345 jvmtiEventException callback = env->callbacks()->Exception;
1346 if (callback != NULL) {
1347 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1348 jem.jni_methodID(), jem.location(),
1349 jem.exception(),
1350 catch_jmethodID, current_bci);
1351 }
1352 }
1353 }
1354 }
1355
1356 // frames may get popped because of this throw, be safe - invalidate cached depth
1357 state->invalidate_cur_stack_depth();
1358 }
1359
1360
1361 void JvmtiExport::notice_unwind_due_to_exception(JavaThread *thread, Method* method, address location, oop exception, bool in_handler_frame) {
1362 HandleMark hm(thread);
1363 methodHandle mh(thread, method);
1364 Handle exception_handle(thread, exception);
1365
1366 JvmtiThreadState *state = thread->jvmti_thread_state();
1367 if (state == NULL) {
1368 return;
1369 }
1370 EVT_TRIG_TRACE(JVMTI_EVENT_EXCEPTION_CATCH,
1371 ("JVMTI [%s] Trg unwind_due_to_exception triggered %s.%s @ %s%d - %s",
1372 JvmtiTrace::safe_get_thread_name(thread),
1373 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1374 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1375 location==0? "no location:" : "",
1376 location==0? 0 : location - mh()->code_base(),
1377 in_handler_frame? "in handler frame" : "not handler frame" ));
1378
1379 if (state->is_exception_detected()) {
1380
1381 state->invalidate_cur_stack_depth();
1382 if (!in_handler_frame) {
1383 // Not in exception handler.
1384 if(state->is_interp_only_mode()) {
1385 // method exit and frame pop events are posted only in interp mode.
1386 // When these events are enabled code should be in running in interp mode.
1387 JvmtiExport::post_method_exit(thread, method, thread->last_frame());
1388 // The cached cur_stack_depth might have changed from the
1389 // operations of frame pop or method exit. We are not 100% sure
1390 // the cached cur_stack_depth is still valid depth so invalidate
1391 // it.
1392 state->invalidate_cur_stack_depth();
1393 }
1394 } else {
1395 // In exception handler frame. Report exception catch.
1396 assert(location != NULL, "must be a known location");
1397 // Update cur_stack_depth - the frames above the current frame
1398 // have been unwound due to this exception:
1399 assert(!state->is_exception_caught(), "exception must not be caught yet.");
1400 state->set_exception_caught();
1401
1402 JvmtiEnvThreadStateIterator it(state);
1403 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1404 if (ets->is_enabled(JVMTI_EVENT_EXCEPTION_CATCH) && (exception_handle() != NULL)) {
1405 EVT_TRACE(JVMTI_EVENT_EXCEPTION_CATCH,
1406 ("JVMTI [%s] Evt ExceptionCatch sent %s.%s @ %d",
1407 JvmtiTrace::safe_get_thread_name(thread),
1408 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1409 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1410 location - mh()->code_base() ));
1411
1412 JvmtiEnv *env = ets->get_env();
1413 JvmtiExceptionEventMark jem(thread, mh, location, exception_handle);
1414 JvmtiJavaThreadEventTransition jet(thread);
1415 jvmtiEventExceptionCatch callback = env->callbacks()->ExceptionCatch;
1416 if (callback != NULL) {
1417 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1418 jem.jni_methodID(), jem.location(),
1419 jem.exception());
1420 }
1421 }
1422 }
1423 }
1424 }
1425 }
1426
1427 oop JvmtiExport::jni_GetField_probe(JavaThread *thread, jobject jobj, oop obj,
1428 Klass* klass, jfieldID fieldID, bool is_static) {
1429 if (*((int *)get_field_access_count_addr()) > 0 && thread->has_last_Java_frame()) {
1430 // At least one field access watch is set so we have more work
1431 // to do. This wrapper is used by entry points that allow us
1432 // to create handles in post_field_access_by_jni().
1433 post_field_access_by_jni(thread, obj, klass, fieldID, is_static);
1434 // event posting can block so refetch oop if we were passed a jobj
1435 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj);
1436 }
1437 return obj;
1438 }
1439
1440 oop JvmtiExport::jni_GetField_probe_nh(JavaThread *thread, jobject jobj, oop obj,
1441 Klass* klass, jfieldID fieldID, bool is_static) {
1442 if (*((int *)get_field_access_count_addr()) > 0 && thread->has_last_Java_frame()) {
1443 // At least one field access watch is set so we have more work
1444 // to do. This wrapper is used by "quick" entry points that don't
1445 // allow us to create handles in post_field_access_by_jni(). We
1446 // override that with a ResetNoHandleMark.
1447 ResetNoHandleMark rnhm;
1448 post_field_access_by_jni(thread, obj, klass, fieldID, is_static);
1449 // event posting can block so refetch oop if we were passed a jobj
1450 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj);
1451 }
1452 return obj;
1453 }
1454
1455 void JvmtiExport::post_field_access_by_jni(JavaThread *thread, oop obj,
1456 Klass* klass, jfieldID fieldID, bool is_static) {
1457 // We must be called with a Java context in order to provide reasonable
1458 // values for the klazz, method, and location fields. The callers of this
1459 // function don't make the call unless there is a Java context.
1460 assert(thread->has_last_Java_frame(), "must be called with a Java context");
1461
1462 ResourceMark rm;
1463 fieldDescriptor fd;
1464 // if get_field_descriptor finds fieldID to be invalid, then we just bail
1465 bool valid_fieldID = JvmtiEnv::get_field_descriptor(klass, fieldID, &fd);
1466 assert(valid_fieldID == true,"post_field_access_by_jni called with invalid fieldID");
1467 if (!valid_fieldID) return;
1468 // field accesses are not watched so bail
1469 if (!fd.is_field_access_watched()) return;
1470
1471 HandleMark hm(thread);
1472 KlassHandle h_klass(thread, klass);
1473 Handle h_obj;
1474 if (!is_static) {
1475 // non-static field accessors have an object, but we need a handle
1476 assert(obj != NULL, "non-static needs an object");
1477 h_obj = Handle(thread, obj);
1478 }
1479 post_field_access(thread,
1480 thread->last_frame().interpreter_frame_method(),
1481 thread->last_frame().interpreter_frame_bcp(),
1482 h_klass, h_obj, fieldID);
1483 }
1484
1485 void JvmtiExport::post_field_access(JavaThread *thread, Method* method,
1486 address location, KlassHandle field_klass, Handle object, jfieldID field) {
1487
1488 HandleMark hm(thread);
1489 methodHandle mh(thread, method);
1490
1491 JvmtiThreadState *state = thread->jvmti_thread_state();
1492 if (state == NULL) {
1493 return;
1494 }
1495 EVT_TRIG_TRACE(JVMTI_EVENT_FIELD_ACCESS, ("JVMTI [%s] Trg Field Access event triggered",
1496 JvmtiTrace::safe_get_thread_name(thread)));
1497 JvmtiEnvThreadStateIterator it(state);
1498 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1499 if (ets->is_enabled(JVMTI_EVENT_FIELD_ACCESS)) {
1500 EVT_TRACE(JVMTI_EVENT_FIELD_ACCESS, ("JVMTI [%s] Evt Field Access event sent %s.%s @ %d",
1501 JvmtiTrace::safe_get_thread_name(thread),
1502 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1503 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1504 location - mh()->code_base() ));
1505
1506 JvmtiEnv *env = ets->get_env();
1507 JvmtiLocationEventMark jem(thread, mh, location);
1508 jclass field_jclass = jem.to_jclass(field_klass());
1509 jobject field_jobject = jem.to_jobject(object());
1510 JvmtiJavaThreadEventTransition jet(thread);
1511 jvmtiEventFieldAccess callback = env->callbacks()->FieldAccess;
1512 if (callback != NULL) {
1513 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1514 jem.jni_methodID(), jem.location(),
1515 field_jclass, field_jobject, field);
1516 }
1517 }
1518 }
1519 }
1520
1521 oop JvmtiExport::jni_SetField_probe(JavaThread *thread, jobject jobj, oop obj,
1522 Klass* klass, jfieldID fieldID, bool is_static,
1523 char sig_type, jvalue *value) {
1524 if (*((int *)get_field_modification_count_addr()) > 0 && thread->has_last_Java_frame()) {
1525 // At least one field modification watch is set so we have more work
1526 // to do. This wrapper is used by entry points that allow us
1527 // to create handles in post_field_modification_by_jni().
1528 post_field_modification_by_jni(thread, obj, klass, fieldID, is_static, sig_type, value);
1529 // event posting can block so refetch oop if we were passed a jobj
1530 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj);
1531 }
1532 return obj;
1533 }
1534
1535 oop JvmtiExport::jni_SetField_probe_nh(JavaThread *thread, jobject jobj, oop obj,
1536 Klass* klass, jfieldID fieldID, bool is_static,
1537 char sig_type, jvalue *value) {
1538 if (*((int *)get_field_modification_count_addr()) > 0 && thread->has_last_Java_frame()) {
1539 // At least one field modification watch is set so we have more work
1540 // to do. This wrapper is used by "quick" entry points that don't
1541 // allow us to create handles in post_field_modification_by_jni(). We
1542 // override that with a ResetNoHandleMark.
1543 ResetNoHandleMark rnhm;
1544 post_field_modification_by_jni(thread, obj, klass, fieldID, is_static, sig_type, value);
1545 // event posting can block so refetch oop if we were passed a jobj
1546 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj);
1547 }
1548 return obj;
1549 }
1550
1551 void JvmtiExport::post_field_modification_by_jni(JavaThread *thread, oop obj,
1552 Klass* klass, jfieldID fieldID, bool is_static,
1553 char sig_type, jvalue *value) {
1554 // We must be called with a Java context in order to provide reasonable
1555 // values for the klazz, method, and location fields. The callers of this
1556 // function don't make the call unless there is a Java context.
1557 assert(thread->has_last_Java_frame(), "must be called with Java context");
1558
1559 ResourceMark rm;
1560 fieldDescriptor fd;
1561 // if get_field_descriptor finds fieldID to be invalid, then we just bail
1562 bool valid_fieldID = JvmtiEnv::get_field_descriptor(klass, fieldID, &fd);
1563 assert(valid_fieldID == true,"post_field_modification_by_jni called with invalid fieldID");
1564 if (!valid_fieldID) return;
1565 // field modifications are not watched so bail
1566 if (!fd.is_field_modification_watched()) return;
1567
1568 HandleMark hm(thread);
1569
1570 Handle h_obj;
1571 if (!is_static) {
1572 // non-static field accessors have an object, but we need a handle
1573 assert(obj != NULL, "non-static needs an object");
1574 h_obj = Handle(thread, obj);
1575 }
1576 KlassHandle h_klass(thread, klass);
1577 post_field_modification(thread,
1578 thread->last_frame().interpreter_frame_method(),
1579 thread->last_frame().interpreter_frame_bcp(),
1580 h_klass, h_obj, fieldID, sig_type, value);
1581 }
1582
1583 void JvmtiExport::post_raw_field_modification(JavaThread *thread, Method* method,
1584 address location, KlassHandle field_klass, Handle object, jfieldID field,
1585 char sig_type, jvalue *value) {
1586
1587 if (sig_type == 'I' || sig_type == 'Z' || sig_type == 'C' || sig_type == 'S') {
1588 // 'I' instructions are used for byte, char, short and int.
1589 // determine which it really is, and convert
1590 fieldDescriptor fd;
1591 bool found = JvmtiEnv::get_field_descriptor(field_klass(), field, &fd);
1592 // should be found (if not, leave as is)
1593 if (found) {
1594 jint ival = value->i;
1595 // convert value from int to appropriate type
1596 switch (fd.field_type()) {
1597 case T_BOOLEAN:
1598 sig_type = 'Z';
1599 value->i = 0; // clear it
1600 value->z = (jboolean)ival;
1601 break;
1602 case T_BYTE:
1603 sig_type = 'B';
1604 value->i = 0; // clear it
1605 value->b = (jbyte)ival;
1606 break;
1607 case T_CHAR:
1608 sig_type = 'C';
1609 value->i = 0; // clear it
1610 value->c = (jchar)ival;
1611 break;
1612 case T_SHORT:
1613 sig_type = 'S';
1614 value->i = 0; // clear it
1615 value->s = (jshort)ival;
1616 break;
1617 case T_INT:
1618 // nothing to do
1619 break;
1620 default:
1621 // this is an integer instruction, should be one of above
1622 ShouldNotReachHere();
1623 break;
1624 }
1625 }
1626 }
1627
1628 assert(sig_type != '[', "array should have sig_type == 'L'");
1629 bool handle_created = false;
1630
1631 // convert oop to JNI handle.
1632 if (sig_type == 'L') {
1633 handle_created = true;
1634 value->l = (jobject)JNIHandles::make_local(thread, (oop)value->l);
1635 }
1636
1637 post_field_modification(thread, method, location, field_klass, object, field, sig_type, value);
1638
1639 // Destroy the JNI handle allocated above.
1640 if (handle_created) {
1641 JNIHandles::destroy_local(value->l);
1642 }
1643 }
1644
1645 void JvmtiExport::post_field_modification(JavaThread *thread, Method* method,
1646 address location, KlassHandle field_klass, Handle object, jfieldID field,
1647 char sig_type, jvalue *value_ptr) {
1648
1649 HandleMark hm(thread);
1650 methodHandle mh(thread, method);
1651
1652 JvmtiThreadState *state = thread->jvmti_thread_state();
1653 if (state == NULL) {
1654 return;
1655 }
1656 EVT_TRIG_TRACE(JVMTI_EVENT_FIELD_MODIFICATION,
1657 ("JVMTI [%s] Trg Field Modification event triggered",
1658 JvmtiTrace::safe_get_thread_name(thread)));
1659
1660 JvmtiEnvThreadStateIterator it(state);
1661 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1662 if (ets->is_enabled(JVMTI_EVENT_FIELD_MODIFICATION)) {
1663 EVT_TRACE(JVMTI_EVENT_FIELD_MODIFICATION,
1664 ("JVMTI [%s] Evt Field Modification event sent %s.%s @ %d",
1665 JvmtiTrace::safe_get_thread_name(thread),
1666 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1667 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1668 location - mh()->code_base() ));
1669
1670 JvmtiEnv *env = ets->get_env();
1671 JvmtiLocationEventMark jem(thread, mh, location);
1672 jclass field_jclass = jem.to_jclass(field_klass());
1673 jobject field_jobject = jem.to_jobject(object());
1674 JvmtiJavaThreadEventTransition jet(thread);
1675 jvmtiEventFieldModification callback = env->callbacks()->FieldModification;
1676 if (callback != NULL) {
1677 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1678 jem.jni_methodID(), jem.location(),
1679 field_jclass, field_jobject, field, sig_type, *value_ptr);
1680 }
1681 }
1682 }
1683 }
1684
1685 void JvmtiExport::post_native_method_bind(Method* method, address* function_ptr) {
1686 JavaThread* thread = JavaThread::current();
1687 assert(thread->thread_state() == _thread_in_vm, "must be in vm state");
1688
1689 HandleMark hm(thread);
1690 methodHandle mh(thread, method);
1691
1692 EVT_TRIG_TRACE(JVMTI_EVENT_NATIVE_METHOD_BIND, ("JVMTI [%s] Trg Native Method Bind event triggered",
1693 JvmtiTrace::safe_get_thread_name(thread)));
1694
1695 if (JvmtiEventController::is_enabled(JVMTI_EVENT_NATIVE_METHOD_BIND)) {
1696 JvmtiEnvIterator it;
1697 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1698 if (env->is_enabled(JVMTI_EVENT_NATIVE_METHOD_BIND)) {
1699 EVT_TRACE(JVMTI_EVENT_NATIVE_METHOD_BIND, ("JVMTI [%s] Evt Native Method Bind event sent",
1700 JvmtiTrace::safe_get_thread_name(thread) ));
1701
1702 JvmtiMethodEventMark jem(thread, mh);
1703 JvmtiJavaThreadEventTransition jet(thread);
1704 JNIEnv* jni_env = JvmtiEnv::get_phase() == JVMTI_PHASE_PRIMORDIAL? NULL : jem.jni_env();
1705 jvmtiEventNativeMethodBind callback = env->callbacks()->NativeMethodBind;
1706 if (callback != NULL) {
1707 (*callback)(env->jvmti_external(), jni_env, jem.jni_thread(),
1708 jem.jni_methodID(), (void*)(*function_ptr), (void**)function_ptr);
1709 }
1710 }
1711 }
1712 }
1713 }
1714
1715 // Returns a record containing inlining information for the given nmethod
1716 jvmtiCompiledMethodLoadInlineRecord* create_inline_record(nmethod* nm) {
1717 jint numstackframes = 0;
1718 jvmtiCompiledMethodLoadInlineRecord* record = (jvmtiCompiledMethodLoadInlineRecord*)NEW_RESOURCE_OBJ(jvmtiCompiledMethodLoadInlineRecord);
1719 record->header.kind = JVMTI_CMLR_INLINE_INFO;
1720 record->header.next = NULL;
1721 record->header.majorinfoversion = JVMTI_CMLR_MAJOR_VERSION_1;
1722 record->header.minorinfoversion = JVMTI_CMLR_MINOR_VERSION_0;
1723 record->numpcs = 0;
1724 for(PcDesc* p = nm->scopes_pcs_begin(); p < nm->scopes_pcs_end(); p++) {
1725 if(p->scope_decode_offset() == DebugInformationRecorder::serialized_null) continue;
1726 record->numpcs++;
1727 }
1728 record->pcinfo = (PCStackInfo*)(NEW_RESOURCE_ARRAY(PCStackInfo, record->numpcs));
1729 int scope = 0;
1730 for(PcDesc* p = nm->scopes_pcs_begin(); p < nm->scopes_pcs_end(); p++) {
1731 if(p->scope_decode_offset() == DebugInformationRecorder::serialized_null) continue;
1732 void* pc_address = (void*)p->real_pc(nm);
1733 assert(pc_address != NULL, "pc_address must be non-null");
1734 record->pcinfo[scope].pc = pc_address;
1735 numstackframes=0;
1736 for(ScopeDesc* sd = nm->scope_desc_at(p->real_pc(nm));sd != NULL;sd = sd->sender()) {
1737 numstackframes++;
1738 }
1739 assert(numstackframes != 0, "numstackframes must be nonzero.");
1740 record->pcinfo[scope].methods = (jmethodID *)NEW_RESOURCE_ARRAY(jmethodID, numstackframes);
1741 record->pcinfo[scope].bcis = (jint *)NEW_RESOURCE_ARRAY(jint, numstackframes);
1742 record->pcinfo[scope].numstackframes = numstackframes;
1743 int stackframe = 0;
1744 for(ScopeDesc* sd = nm->scope_desc_at(p->real_pc(nm));sd != NULL;sd = sd->sender()) {
1745 // 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()
1746 assert(sd->method() != NULL, "sd->method() cannot be null.");
1747 record->pcinfo[scope].methods[stackframe] = sd->method()->jmethod_id();
1748 record->pcinfo[scope].bcis[stackframe] = sd->bci();
1749 stackframe++;
1750 }
1751 scope++;
1752 }
1753 return record;
1754 }
1755
1756 void JvmtiExport::post_compiled_method_load(nmethod *nm) {
1757 JavaThread* thread = JavaThread::current();
1758
1759 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
1760 ("JVMTI [%s] method compile load event triggered",
1761 JvmtiTrace::safe_get_thread_name(thread)));
1762
1763 JvmtiEnvIterator it;
1764 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1765 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_LOAD)) {
1766
1767 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
1768 ("JVMTI [%s] class compile method load event sent %s.%s ",
1769 JvmtiTrace::safe_get_thread_name(thread),
1770 (nm->method() == NULL) ? "NULL" : nm->method()->klass_name()->as_C_string(),
1771 (nm->method() == NULL) ? "NULL" : nm->method()->name()->as_C_string()));
1772 ResourceMark rm(thread);
1773 HandleMark hm(thread);
1774
1775 // Add inlining information
1776 jvmtiCompiledMethodLoadInlineRecord* inlinerecord = create_inline_record(nm);
1777 // Pass inlining information through the void pointer
1778 JvmtiCompiledMethodLoadEventMark jem(thread, nm, inlinerecord);
1779 JvmtiJavaThreadEventTransition jet(thread);
1780 jvmtiEventCompiledMethodLoad callback = env->callbacks()->CompiledMethodLoad;
1781 if (callback != NULL) {
1782 (*callback)(env->jvmti_external(), jem.jni_methodID(),
1783 jem.code_size(), jem.code_data(), jem.map_length(),
1784 jem.map(), jem.compile_info());
1785 }
1786 }
1787 }
1788 }
1789
1790
1791 // post a COMPILED_METHOD_LOAD event for a given environment
1792 void JvmtiExport::post_compiled_method_load(JvmtiEnv* env, const jmethodID method, const jint length,
1793 const void *code_begin, const jint map_length,
1794 const jvmtiAddrLocationMap* map)
1795 {
1796 JavaThread* thread = JavaThread::current();
1797 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
1798 ("JVMTI [%s] method compile load event triggered (by GenerateEvents)",
1799 JvmtiTrace::safe_get_thread_name(thread)));
1800 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_LOAD)) {
1801
1802 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
1803 ("JVMTI [%s] class compile method load event sent (by GenerateEvents), jmethodID=" PTR_FORMAT,
1804 JvmtiTrace::safe_get_thread_name(thread), method));
1805
1806 JvmtiEventMark jem(thread);
1807 JvmtiJavaThreadEventTransition jet(thread);
1808 jvmtiEventCompiledMethodLoad callback = env->callbacks()->CompiledMethodLoad;
1809 if (callback != NULL) {
1810 (*callback)(env->jvmti_external(), method,
1811 length, code_begin, map_length,
1812 map, NULL);
1813 }
1814 }
1815 }
1816
1817 void JvmtiExport::post_dynamic_code_generated_internal(const char *name, const void *code_begin, const void *code_end) {
1818 assert(name != NULL && name[0] != '\0', "sanity check");
1819
1820 JavaThread* thread = JavaThread::current();
1821 // In theory everyone coming thru here is in_vm but we need to be certain
1822 // because a callee will do a vm->native transition
1823 ThreadInVMfromUnknown __tiv;
1824
1825 EVT_TRIG_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED,
1826 ("JVMTI [%s] method dynamic code generated event triggered",
1827 JvmtiTrace::safe_get_thread_name(thread)));
1828 JvmtiEnvIterator it;
1829 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1830 if (env->is_enabled(JVMTI_EVENT_DYNAMIC_CODE_GENERATED)) {
1831 EVT_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED,
1832 ("JVMTI [%s] dynamic code generated event sent for %s",
1833 JvmtiTrace::safe_get_thread_name(thread), name));
1834 JvmtiEventMark jem(thread);
1835 JvmtiJavaThreadEventTransition jet(thread);
1836 jint length = (jint)pointer_delta(code_end, code_begin, sizeof(char));
1837 jvmtiEventDynamicCodeGenerated callback = env->callbacks()->DynamicCodeGenerated;
1838 if (callback != NULL) {
1839 (*callback)(env->jvmti_external(), name, (void*)code_begin, length);
1840 }
1841 }
1842 }
1843 }
1844
1845 void JvmtiExport::post_dynamic_code_generated(const char *name, const void *code_begin, const void *code_end) {
1846 jvmtiPhase phase = JvmtiEnv::get_phase();
1847 if (phase == JVMTI_PHASE_PRIMORDIAL || phase == JVMTI_PHASE_START) {
1848 post_dynamic_code_generated_internal(name, code_begin, code_end);
1849 } else {
1850 // It may not be safe to post the event from this thread. Defer all
1851 // postings to the service thread so that it can perform them in a safe
1852 // context and in-order.
1853 MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag);
1854 JvmtiDeferredEvent event = JvmtiDeferredEvent::dynamic_code_generated_event(
1855 name, code_begin, code_end);
1856 JvmtiDeferredEventQueue::enqueue(event);
1857 }
1858 }
1859
1860
1861 // post a DYNAMIC_CODE_GENERATED event for a given environment
1862 // used by GenerateEvents
1863 void JvmtiExport::post_dynamic_code_generated(JvmtiEnv* env, const char *name,
1864 const void *code_begin, const void *code_end)
1865 {
1866 JavaThread* thread = JavaThread::current();
1867 EVT_TRIG_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED,
1868 ("JVMTI [%s] dynamic code generated event triggered (by GenerateEvents)",
1869 JvmtiTrace::safe_get_thread_name(thread)));
1870 if (env->is_enabled(JVMTI_EVENT_DYNAMIC_CODE_GENERATED)) {
1871 EVT_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED,
1872 ("JVMTI [%s] dynamic code generated event sent for %s",
1873 JvmtiTrace::safe_get_thread_name(thread), name));
1874 JvmtiEventMark jem(thread);
1875 JvmtiJavaThreadEventTransition jet(thread);
1876 jint length = (jint)pointer_delta(code_end, code_begin, sizeof(char));
1877 jvmtiEventDynamicCodeGenerated callback = env->callbacks()->DynamicCodeGenerated;
1878 if (callback != NULL) {
1879 (*callback)(env->jvmti_external(), name, (void*)code_begin, length);
1880 }
1881 }
1882 }
1883
1884 // post a DynamicCodeGenerated event while holding locks in the VM.
1885 void JvmtiExport::post_dynamic_code_generated_while_holding_locks(const char* name,
1886 address code_begin, address code_end)
1887 {
1888 // register the stub with the current dynamic code event collector
1889 JvmtiThreadState* state = JvmtiThreadState::state_for(JavaThread::current());
1890 // state can only be NULL if the current thread is exiting which
1891 // should not happen since we're trying to post an event
1892 guarantee(state != NULL, "attempt to register stub via an exiting thread");
1893 JvmtiDynamicCodeEventCollector* collector = state->get_dynamic_code_event_collector();
1894 guarantee(collector != NULL, "attempt to register stub without event collector");
1895 collector->register_stub(name, code_begin, code_end);
1896 }
1897
1898 // Collect all the vm internally allocated objects which are visible to java world
1899 void JvmtiExport::record_vm_internal_object_allocation(oop obj) {
1900 Thread* thread = ThreadLocalStorage::thread();
1901 if (thread != NULL && thread->is_Java_thread()) {
1902 // Can not take safepoint here.
1903 No_Safepoint_Verifier no_sfpt;
1904 // Can not take safepoint here so can not use state_for to get
1905 // jvmti thread state.
1906 JvmtiThreadState *state = ((JavaThread*)thread)->jvmti_thread_state();
1907 if (state != NULL ) {
1908 // state is non NULL when VMObjectAllocEventCollector is enabled.
1909 JvmtiVMObjectAllocEventCollector *collector;
1910 collector = state->get_vm_object_alloc_event_collector();
1911 if (collector != NULL && collector->is_enabled()) {
1912 // Don't record classes as these will be notified via the ClassLoad
1913 // event.
1914 if (obj->klass() != SystemDictionary::Class_klass()) {
1915 collector->record_allocation(obj);
1916 }
1917 }
1918 }
1919 }
1920 }
1921
1922 void JvmtiExport::post_garbage_collection_finish() {
1923 Thread *thread = Thread::current(); // this event is posted from VM-Thread.
1924 EVT_TRIG_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH,
1925 ("JVMTI [%s] garbage collection finish event triggered",
1926 JvmtiTrace::safe_get_thread_name(thread)));
1927 JvmtiEnvIterator it;
1928 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1929 if (env->is_enabled(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH)) {
1930 EVT_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH,
1931 ("JVMTI [%s] garbage collection finish event sent ",
1932 JvmtiTrace::safe_get_thread_name(thread)));
1933 JvmtiThreadEventTransition jet(thread);
1934 // JNIEnv is NULL here because this event is posted from VM Thread
1935 jvmtiEventGarbageCollectionFinish callback = env->callbacks()->GarbageCollectionFinish;
1936 if (callback != NULL) {
1937 (*callback)(env->jvmti_external());
1938 }
1939 }
1940 }
1941 }
1942
1943 void JvmtiExport::post_garbage_collection_start() {
1944 Thread* thread = Thread::current(); // this event is posted from vm-thread.
1945 EVT_TRIG_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_START,
1946 ("JVMTI [%s] garbage collection start event triggered",
1947 JvmtiTrace::safe_get_thread_name(thread)));
1948 JvmtiEnvIterator it;
1949 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1950 if (env->is_enabled(JVMTI_EVENT_GARBAGE_COLLECTION_START)) {
1951 EVT_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_START,
1952 ("JVMTI [%s] garbage collection start event sent ",
1953 JvmtiTrace::safe_get_thread_name(thread)));
1954 JvmtiThreadEventTransition jet(thread);
1955 // JNIEnv is NULL here because this event is posted from VM Thread
1956 jvmtiEventGarbageCollectionStart callback = env->callbacks()->GarbageCollectionStart;
1957 if (callback != NULL) {
1958 (*callback)(env->jvmti_external());
1959 }
1960 }
1961 }
1962 }
1963
1964 void JvmtiExport::post_data_dump() {
1965 Thread *thread = Thread::current();
1966 EVT_TRIG_TRACE(JVMTI_EVENT_DATA_DUMP_REQUEST,
1967 ("JVMTI [%s] data dump request event triggered",
1968 JvmtiTrace::safe_get_thread_name(thread)));
1969 JvmtiEnvIterator it;
1970 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1971 if (env->is_enabled(JVMTI_EVENT_DATA_DUMP_REQUEST)) {
1972 EVT_TRACE(JVMTI_EVENT_DATA_DUMP_REQUEST,
1973 ("JVMTI [%s] data dump request event sent ",
1974 JvmtiTrace::safe_get_thread_name(thread)));
1975 JvmtiThreadEventTransition jet(thread);
1976 // JNIEnv is NULL here because this event is posted from VM Thread
1977 jvmtiEventDataDumpRequest callback = env->callbacks()->DataDumpRequest;
1978 if (callback != NULL) {
1979 (*callback)(env->jvmti_external());
1980 }
1981 }
1982 }
1983 }
1984
1985 void JvmtiExport::post_monitor_contended_enter(JavaThread *thread, ObjectMonitor *obj_mntr) {
1986 oop object = (oop)obj_mntr->object();
1987 if (!ServiceUtil::visible_oop(object)) {
1988 // Ignore monitor contended enter for vm internal object.
1989 return;
1990 }
1991 JvmtiThreadState *state = thread->jvmti_thread_state();
1992 if (state == NULL) {
1993 return;
1994 }
1995
1996 HandleMark hm(thread);
1997 Handle h(thread, object);
1998
1999 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTER,
2000 ("JVMTI [%s] montior contended enter event triggered",
2001 JvmtiTrace::safe_get_thread_name(thread)));
2002
2003 JvmtiEnvThreadStateIterator it(state);
2004 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
2005 if (ets->is_enabled(JVMTI_EVENT_MONITOR_CONTENDED_ENTER)) {
2006 EVT_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTER,
2007 ("JVMTI [%s] monitor contended enter event sent",
2008 JvmtiTrace::safe_get_thread_name(thread)));
2009 JvmtiMonitorEventMark jem(thread, h());
2010 JvmtiEnv *env = ets->get_env();
2011 JvmtiThreadEventTransition jet(thread);
2012 jvmtiEventMonitorContendedEnter callback = env->callbacks()->MonitorContendedEnter;
2013 if (callback != NULL) {
2014 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_object());
2015 }
2016 }
2017 }
2018 }
2019
2020 void JvmtiExport::post_monitor_contended_entered(JavaThread *thread, ObjectMonitor *obj_mntr) {
2021 oop object = (oop)obj_mntr->object();
2022 if (!ServiceUtil::visible_oop(object)) {
2023 // Ignore monitor contended entered for vm internal object.
2024 return;
2025 }
2026 JvmtiThreadState *state = thread->jvmti_thread_state();
2027 if (state == NULL) {
2028 return;
2029 }
2030
2031 HandleMark hm(thread);
2032 Handle h(thread, object);
2033
2034 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED,
2035 ("JVMTI [%s] montior contended entered event triggered",
2036 JvmtiTrace::safe_get_thread_name(thread)));
2037
2038 JvmtiEnvThreadStateIterator it(state);
2039 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
2040 if (ets->is_enabled(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED)) {
2041 EVT_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED,
2042 ("JVMTI [%s] monitor contended enter event sent",
2043 JvmtiTrace::safe_get_thread_name(thread)));
2044 JvmtiMonitorEventMark jem(thread, h());
2045 JvmtiEnv *env = ets->get_env();
2046 JvmtiThreadEventTransition jet(thread);
2047 jvmtiEventMonitorContendedEntered callback = env->callbacks()->MonitorContendedEntered;
2048 if (callback != NULL) {
2049 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_object());
2050 }
2051 }
2052 }
2053 }
2054
2055 void JvmtiExport::post_monitor_wait(JavaThread *thread, oop object,
2056 jlong timeout) {
2057 JvmtiThreadState *state = thread->jvmti_thread_state();
2058 if (state == NULL) {
2059 return;
2060 }
2061
2062 HandleMark hm(thread);
2063 Handle h(thread, object);
2064
2065 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_WAIT,
2066 ("JVMTI [%s] montior wait event triggered",
2067 JvmtiTrace::safe_get_thread_name(thread)));
2068
2069 JvmtiEnvThreadStateIterator it(state);
2070 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
2071 if (ets->is_enabled(JVMTI_EVENT_MONITOR_WAIT)) {
2072 EVT_TRACE(JVMTI_EVENT_MONITOR_WAIT,
2073 ("JVMTI [%s] monitor wait event sent ",
2074 JvmtiTrace::safe_get_thread_name(thread)));
2075 JvmtiMonitorEventMark jem(thread, h());
2076 JvmtiEnv *env = ets->get_env();
2077 JvmtiThreadEventTransition jet(thread);
2078 jvmtiEventMonitorWait callback = env->callbacks()->MonitorWait;
2079 if (callback != NULL) {
2080 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
2081 jem.jni_object(), timeout);
2082 }
2083 }
2084 }
2085 }
2086
2087 void JvmtiExport::post_monitor_waited(JavaThread *thread, ObjectMonitor *obj_mntr, jboolean timed_out) {
2088 oop object = (oop)obj_mntr->object();
2089 if (!ServiceUtil::visible_oop(object)) {
2090 // Ignore monitor waited for vm internal object.
2091 return;
2092 }
2093 JvmtiThreadState *state = thread->jvmti_thread_state();
2094 if (state == NULL) {
2095 return;
2096 }
2097
2098 HandleMark hm(thread);
2099 Handle h(thread, object);
2100
2101 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_WAITED,
2102 ("JVMTI [%s] montior waited event triggered",
2103 JvmtiTrace::safe_get_thread_name(thread)));
2104
2105 JvmtiEnvThreadStateIterator it(state);
2106 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
2107 if (ets->is_enabled(JVMTI_EVENT_MONITOR_WAITED)) {
2108 EVT_TRACE(JVMTI_EVENT_MONITOR_WAITED,
2109 ("JVMTI [%s] monitor waited event sent ",
2110 JvmtiTrace::safe_get_thread_name(thread)));
2111 JvmtiMonitorEventMark jem(thread, h());
2112 JvmtiEnv *env = ets->get_env();
2113 JvmtiThreadEventTransition jet(thread);
2114 jvmtiEventMonitorWaited callback = env->callbacks()->MonitorWaited;
2115 if (callback != NULL) {
2116 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
2117 jem.jni_object(), timed_out);
2118 }
2119 }
2120 }
2121 }
2122
2123
2124 void JvmtiExport::post_vm_object_alloc(JavaThread *thread, oop object) {
2125 EVT_TRIG_TRACE(JVMTI_EVENT_VM_OBJECT_ALLOC, ("JVMTI [%s] Trg vm object alloc triggered",
2126 JvmtiTrace::safe_get_thread_name(thread)));
2127 if (object == NULL) {
2128 return;
2129 }
2130 HandleMark hm(thread);
2131 Handle h(thread, object);
2132 JvmtiEnvIterator it;
2133 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
2134 if (env->is_enabled(JVMTI_EVENT_VM_OBJECT_ALLOC)) {
2135 EVT_TRACE(JVMTI_EVENT_VM_OBJECT_ALLOC, ("JVMTI [%s] Evt vmobject alloc sent %s",
2136 JvmtiTrace::safe_get_thread_name(thread),
2137 object==NULL? "NULL" : java_lang_Class::as_Klass(object)->external_name()));
2138
2139 JvmtiVMObjectAllocEventMark jem(thread, h());
2140 JvmtiJavaThreadEventTransition jet(thread);
2141 jvmtiEventVMObjectAlloc callback = env->callbacks()->VMObjectAlloc;
2142 if (callback != NULL) {
2143 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
2144 jem.jni_jobject(), jem.jni_class(), jem.size());
2145 }
2146 }
2147 }
2148 }
2149
2150 ////////////////////////////////////////////////////////////////////////////////////////////////
2151
2152 void JvmtiExport::cleanup_thread(JavaThread* thread) {
2153 assert(JavaThread::current() == thread, "thread is not current");
2154 MutexLocker mu(JvmtiThreadState_lock);
2155
2156 if (thread->jvmti_thread_state() != NULL) {
2157 // This has to happen after the thread state is removed, which is
2158 // why it is not in post_thread_end_event like its complement
2159 // Maybe both these functions should be rolled into the posts?
2160 JvmtiEventController::thread_ended(thread);
2161 }
2162 }
2163
2164 void JvmtiExport::oops_do(OopClosure* f) {
2165 JvmtiCurrentBreakpoints::oops_do(f);
2166 JvmtiVMObjectAllocEventCollector::oops_do_for_all_threads(f);
2167 }
2168
2169 void JvmtiExport::weak_oops_do(BoolObjectClosure* is_alive, OopClosure* f) {
2170 JvmtiTagMap::weak_oops_do(is_alive, f);
2171 }
2172
2173 void JvmtiExport::gc_epilogue() {
2174 JvmtiCurrentBreakpoints::gc_epilogue();
2175 }
2176
2177 // Onload raw monitor transition.
2178 void JvmtiExport::transition_pending_onload_raw_monitors() {
2179 JvmtiPendingMonitors::transition_raw_monitors();
2180 }
2181
2182 ////////////////////////////////////////////////////////////////////////////////////////////////
2183
2184 // type for the Agent_OnAttach entry point
2185 extern "C" {
2186 typedef jint (JNICALL *OnAttachEntry_t)(JavaVM*, char *, void *);
2187 }
2188
2189 jint JvmtiExport::load_agent_library(AttachOperation* op, outputStream* st) {
2190 char ebuf[1024];
2191 char buffer[JVM_MAXPATHLEN];
2192 void* library = NULL;
2193 jint result = JNI_ERR;
2194 const char *on_attach_symbols[] = AGENT_ONATTACH_SYMBOLS;
2195 size_t num_symbol_entries = ARRAY_SIZE(on_attach_symbols);
2196
2197 // get agent name and options
2198 const char* agent = op->arg(0);
2199 const char* absParam = op->arg(1);
2200 const char* options = op->arg(2);
2201
2202 // The abs paramter should be "true" or "false"
2203 bool is_absolute_path = (absParam != NULL) && (strcmp(absParam,"true")==0);
2204
2205 // Initially marked as invalid. It will be set to valid if we can find the agent
2206 AgentLibrary *agent_lib = new AgentLibrary(agent, options, is_absolute_path, NULL);
2207
2208 // Check for statically linked in agent. If not found then if the path is
2209 // absolute we attempt to load the library. Otherwise we try to load it
2210 // from the standard dll directory.
2211
2212 if (!os::find_builtin_agent(agent_lib, on_attach_symbols, num_symbol_entries)) {
2213 if (is_absolute_path) {
2214 library = os::dll_load(agent, ebuf, sizeof ebuf);
2215 } else {
2216 // Try to load the agent from the standard dll directory
2217 if (os::dll_build_name(buffer, sizeof(buffer), Arguments::get_dll_dir(),
2218 agent)) {
2219 library = os::dll_load(buffer, ebuf, sizeof ebuf);
2220 }
2221 if (library == NULL) {
2222 // not found - try local path
2223 char ns[1] = {0};
2224 if (os::dll_build_name(buffer, sizeof(buffer), ns, agent)) {
2225 library = os::dll_load(buffer, ebuf, sizeof ebuf);
2226 }
2227 }
2228 }
2229 if (library != NULL) {
2230 agent_lib->set_os_lib(library);
2231 agent_lib->set_valid();
2232 }
2233 }
2234 // If the library was loaded then we attempt to invoke the Agent_OnAttach
2235 // function
2236 if (agent_lib->valid()) {
2237 // Lookup the Agent_OnAttach function
2238 OnAttachEntry_t on_attach_entry = NULL;
2239 on_attach_entry = CAST_TO_FN_PTR(OnAttachEntry_t,
2240 os::find_agent_function(agent_lib, false, on_attach_symbols, num_symbol_entries));
2241 if (on_attach_entry == NULL) {
2242 // Agent_OnAttach missing - unload library
2243 if (!agent_lib->is_static_lib()) {
2244 os::dll_unload(library);
2245 }
2246 delete agent_lib;
2247 } else {
2248 // Invoke the Agent_OnAttach function
2249 JavaThread* THREAD = JavaThread::current();
2250 {
2251 extern struct JavaVM_ main_vm;
2252 JvmtiThreadEventMark jem(THREAD);
2253 JvmtiJavaThreadEventTransition jet(THREAD);
2254
2255 result = (*on_attach_entry)(&main_vm, (char*)options, NULL);
2256 }
2257
2258 // Agent_OnAttach may have used JNI
2259 if (HAS_PENDING_EXCEPTION) {
2260 CLEAR_PENDING_EXCEPTION;
2261 }
2262
2263 // If OnAttach returns JNI_OK then we add it to the list of
2264 // agent libraries so that we can call Agent_OnUnload later.
2265 if (result == JNI_OK) {
2266 Arguments::add_loaded_agent(agent_lib);
2267 } else {
2268 delete agent_lib;
2269 }
2270
2271 // Agent_OnAttach executed so completion status is JNI_OK
2272 st->print_cr("%d", result);
2273 result = JNI_OK;
2274 }
2275 }
2276 return result;
2277 }
2278
2279 ////////////////////////////////////////////////////////////////////////////////////////////////
2280
2281 // Setup current current thread for event collection.
2282 void JvmtiEventCollector::setup_jvmti_thread_state() {
2283 // set this event collector to be the current one.
2284 JvmtiThreadState* state = JvmtiThreadState::state_for(JavaThread::current());
2285 // state can only be NULL if the current thread is exiting which
2286 // should not happen since we're trying to configure for event collection
2287 guarantee(state != NULL, "exiting thread called setup_jvmti_thread_state");
2288 if (is_vm_object_alloc_event()) {
2289 _prev = state->get_vm_object_alloc_event_collector();
2290 state->set_vm_object_alloc_event_collector((JvmtiVMObjectAllocEventCollector *)this);
2291 } else if (is_dynamic_code_event()) {
2292 _prev = state->get_dynamic_code_event_collector();
2293 state->set_dynamic_code_event_collector((JvmtiDynamicCodeEventCollector *)this);
2294 }
2295 }
2296
2297 // Unset current event collection in this thread and reset it with previous
2298 // collector.
2299 void JvmtiEventCollector::unset_jvmti_thread_state() {
2300 JvmtiThreadState* state = JavaThread::current()->jvmti_thread_state();
2301 if (state != NULL) {
2302 // restore the previous event collector (if any)
2303 if (is_vm_object_alloc_event()) {
2304 if (state->get_vm_object_alloc_event_collector() == this) {
2305 state->set_vm_object_alloc_event_collector((JvmtiVMObjectAllocEventCollector *)_prev);
2306 } else {
2307 // this thread's jvmti state was created during the scope of
2308 // the event collector.
2309 }
2310 } else {
2311 if (is_dynamic_code_event()) {
2312 if (state->get_dynamic_code_event_collector() == this) {
2313 state->set_dynamic_code_event_collector((JvmtiDynamicCodeEventCollector *)_prev);
2314 } else {
2315 // this thread's jvmti state was created during the scope of
2316 // the event collector.
2317 }
2318 }
2319 }
2320 }
2321 }
2322
2323 // create the dynamic code event collector
2324 JvmtiDynamicCodeEventCollector::JvmtiDynamicCodeEventCollector() : _code_blobs(NULL) {
2325 if (JvmtiExport::should_post_dynamic_code_generated()) {
2326 setup_jvmti_thread_state();
2327 }
2328 }
2329
2330 // iterate over any code blob descriptors collected and post a
2331 // DYNAMIC_CODE_GENERATED event to the profiler.
2332 JvmtiDynamicCodeEventCollector::~JvmtiDynamicCodeEventCollector() {
2333 assert(!JavaThread::current()->owns_locks(), "all locks must be released to post deferred events");
2334 // iterate over any code blob descriptors that we collected
2335 if (_code_blobs != NULL) {
2336 for (int i=0; i<_code_blobs->length(); i++) {
2337 JvmtiCodeBlobDesc* blob = _code_blobs->at(i);
2338 JvmtiExport::post_dynamic_code_generated(blob->name(), blob->code_begin(), blob->code_end());
2339 FreeHeap(blob);
2340 }
2341 delete _code_blobs;
2342 }
2343 unset_jvmti_thread_state();
2344 }
2345
2346 // register a stub
2347 void JvmtiDynamicCodeEventCollector::register_stub(const char* name, address start, address end) {
2348 if (_code_blobs == NULL) {
2349 _code_blobs = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<JvmtiCodeBlobDesc*>(1,true);
2350 }
2351 _code_blobs->append(new JvmtiCodeBlobDesc(name, start, end));
2352 }
2353
2354 // Setup current thread to record vm allocated objects.
2355 JvmtiVMObjectAllocEventCollector::JvmtiVMObjectAllocEventCollector() : _allocated(NULL) {
2356 if (JvmtiExport::should_post_vm_object_alloc()) {
2357 _enable = true;
2358 setup_jvmti_thread_state();
2359 } else {
2360 _enable = false;
2361 }
2362 }
2363
2364 // Post vm_object_alloc event for vm allocated objects visible to java
2365 // world.
2366 JvmtiVMObjectAllocEventCollector::~JvmtiVMObjectAllocEventCollector() {
2367 if (_allocated != NULL) {
2368 set_enabled(false);
2369 for (int i = 0; i < _allocated->length(); i++) {
2370 oop obj = _allocated->at(i);
2371 if (ServiceUtil::visible_oop(obj)) {
2372 JvmtiExport::post_vm_object_alloc(JavaThread::current(), obj);
2373 }
2374 }
2375 delete _allocated;
2376 }
2377 unset_jvmti_thread_state();
2378 }
2379
2380 void JvmtiVMObjectAllocEventCollector::record_allocation(oop obj) {
2381 assert(is_enabled(), "VM object alloc event collector is not enabled");
2382 if (_allocated == NULL) {
2383 _allocated = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<oop>(1, true);
2384 }
2385 _allocated->push(obj);
2386 }
2387
2388 // GC support.
2389 void JvmtiVMObjectAllocEventCollector::oops_do(OopClosure* f) {
2390 if (_allocated != NULL) {
2391 for(int i=_allocated->length() - 1; i >= 0; i--) {
2392 if (_allocated->at(i) != NULL) {
2393 f->do_oop(_allocated->adr_at(i));
2394 }
2395 }
2396 }
2397 }
2398
2399 void JvmtiVMObjectAllocEventCollector::oops_do_for_all_threads(OopClosure* f) {
2400 // no-op if jvmti not enabled
2401 if (!JvmtiEnv::environments_might_exist()) {
2402 return;
2403 }
2404
2405 // Runs at safepoint. So no need to acquire Threads_lock.
2406 for (JavaThread *jthr = Threads::first(); jthr != NULL; jthr = jthr->next()) {
2407 JvmtiThreadState *state = jthr->jvmti_thread_state();
2408 if (state != NULL) {
2409 JvmtiVMObjectAllocEventCollector *collector;
2410 collector = state->get_vm_object_alloc_event_collector();
2411 while (collector != NULL) {
2412 collector->oops_do(f);
2413 collector = (JvmtiVMObjectAllocEventCollector *)collector->get_prev();
2414 }
2415 }
2416 }
2417 }
2418
2419
2420 // Disable collection of VMObjectAlloc events
2421 NoJvmtiVMObjectAllocMark::NoJvmtiVMObjectAllocMark() : _collector(NULL) {
2422 // a no-op if VMObjectAlloc event is not enabled
2423 if (!JvmtiExport::should_post_vm_object_alloc()) {
2424 return;
2425 }
2426 Thread* thread = ThreadLocalStorage::thread();
2427 if (thread != NULL && thread->is_Java_thread()) {
2428 JavaThread* current_thread = (JavaThread*)thread;
2429 JvmtiThreadState *state = current_thread->jvmti_thread_state();
2430 if (state != NULL) {
2431 JvmtiVMObjectAllocEventCollector *collector;
2432 collector = state->get_vm_object_alloc_event_collector();
2433 if (collector != NULL && collector->is_enabled()) {
2434 _collector = collector;
2435 _collector->set_enabled(false);
2436 }
2437 }
2438 }
2439 }
2440
2441 // Re-Enable collection of VMObjectAlloc events (if previously enabled)
2442 NoJvmtiVMObjectAllocMark::~NoJvmtiVMObjectAllocMark() {
2443 if (was_enabled()) {
2444 _collector->set_enabled(true);
2445 }
2446 };
2447
2448 JvmtiGCMarker::JvmtiGCMarker() {
2449 // if there aren't any JVMTI environments then nothing to do
2450 if (!JvmtiEnv::environments_might_exist()) {
2451 return;
2452 }
2453
2454 if (JvmtiExport::should_post_garbage_collection_start()) {
2455 JvmtiExport::post_garbage_collection_start();
2456 }
2457
2458 if (SafepointSynchronize::is_at_safepoint()) {
2459 // Do clean up tasks that need to be done at a safepoint
2460 JvmtiEnvBase::check_for_periodic_clean_up();
2461 }
2462 }
2463
2464 JvmtiGCMarker::~JvmtiGCMarker() {
2465 // if there aren't any JVMTI environments then nothing to do
2466 if (!JvmtiEnv::environments_might_exist()) {
2467 return;
2468 }
2469
2470 // JVMTI notify gc finish
2471 if (JvmtiExport::should_post_garbage_collection_finish()) {
2472 JvmtiExport::post_garbage_collection_finish();
2473 }
2474 }