Mercurial > jdk8-mips64-public > hotspot / file revision
src/share/vm/prims/jvmtiExport.cpp@0cddebc420d8
src/share/vm/prims/jvmtiExport.cpp
Thu, 28 Apr 2011 08:24:46 -0700
- author
- dcubed
- date
- Thu, 28 Apr 2011 08:24:46 -0700
- changeset 2836
- 0cddebc420d8
- parent 2583
- f91db74a6810
- child 3241
- a6eef545f1a2
- permissions
- -rw-r--r--
7039447: 2/1 java profiling is broken in build 139 (garbage in function name)
Summary: The name in a deferred JVM/TI DynamicCodeGenerated event needs to be explicitly saved.
Reviewed-by: acorn, never, dsamersoff, dholmes
1 /*
2 * Copyright (c) 2003, 2011, 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 */
25 #include "precompiled.hpp"
26 #include "classfile/systemDictionary.hpp"
27 #include "code/nmethod.hpp"
28 #include "code/pcDesc.hpp"
29 #include "code/scopeDesc.hpp"
30 #include "interpreter/interpreter.hpp"
31 #include "jvmtifiles/jvmtiEnv.hpp"
32 #include "memory/resourceArea.hpp"
33 #include "oops/objArrayKlass.hpp"
34 #include "oops/objArrayOop.hpp"
35 #include "prims/jvmtiCodeBlobEvents.hpp"
36 #include "prims/jvmtiEventController.hpp"
37 #include "prims/jvmtiEventController.inline.hpp"
38 #include "prims/jvmtiExport.hpp"
39 #include "prims/jvmtiImpl.hpp"
40 #include "prims/jvmtiManageCapabilities.hpp"
41 #include "prims/jvmtiRawMonitor.hpp"
42 #include "prims/jvmtiTagMap.hpp"
43 #include "prims/jvmtiThreadState.inline.hpp"
44 #include "runtime/arguments.hpp"
45 #include "runtime/handles.hpp"
46 #include "runtime/interfaceSupport.hpp"
47 #include "runtime/objectMonitor.hpp"
48 #include "runtime/objectMonitor.inline.hpp"
49 #include "runtime/thread.hpp"
50 #include "runtime/vframe.hpp"
51 #include "services/attachListener.hpp"
52 #include "services/serviceUtil.hpp"
53 #ifndef SERIALGC
54 #include "gc_implementation/parallelScavenge/psMarkSweep.hpp"
55 #endif
57 #ifdef JVMTI_TRACE
58 #define EVT_TRACE(evt,out) if ((JvmtiTrace::event_trace_flags(evt) & JvmtiTrace::SHOW_EVENT_SENT) != 0) { SafeResourceMark rm; tty->print_cr out; }
59 #define EVT_TRIG_TRACE(evt,out) if ((JvmtiTrace::event_trace_flags(evt) & JvmtiTrace::SHOW_EVENT_TRIGGER) != 0) { SafeResourceMark rm; tty->print_cr out; }
60 #else
61 #define EVT_TRIG_TRACE(evt,out)
62 #define EVT_TRACE(evt,out)
63 #endif
65 ///////////////////////////////////////////////////////////////
66 //
67 // JvmtiEventTransition
68 //
69 // TO DO --
70 // more handle purging
72 // Use this for JavaThreads and state is _thread_in_vm.
73 class JvmtiJavaThreadEventTransition : StackObj {
74 private:
75 ResourceMark _rm;
76 ThreadToNativeFromVM _transition;
77 HandleMark _hm;
79 public:
80 JvmtiJavaThreadEventTransition(JavaThread *thread) :
81 _rm(),
82 _transition(thread),
83 _hm(thread) {};
84 };
86 // For JavaThreads which are not in _thread_in_vm state
87 // and other system threads use this.
88 class JvmtiThreadEventTransition : StackObj {
89 private:
90 ResourceMark _rm;
91 HandleMark _hm;
92 JavaThreadState _saved_state;
93 JavaThread *_jthread;
95 public:
96 JvmtiThreadEventTransition(Thread *thread) : _rm(), _hm() {
97 if (thread->is_Java_thread()) {
98 _jthread = (JavaThread *)thread;
99 _saved_state = _jthread->thread_state();
100 if (_saved_state == _thread_in_Java) {
101 ThreadStateTransition::transition_from_java(_jthread, _thread_in_native);
102 } else {
103 ThreadStateTransition::transition(_jthread, _saved_state, _thread_in_native);
104 }
105 } else {
106 _jthread = NULL;
107 }
108 }
110 ~JvmtiThreadEventTransition() {
111 if (_jthread != NULL)
112 ThreadStateTransition::transition_from_native(_jthread, _saved_state);
113 }
114 };
117 ///////////////////////////////////////////////////////////////
118 //
119 // JvmtiEventMark
120 //
122 class JvmtiEventMark : public StackObj {
123 private:
124 JavaThread *_thread;
125 JNIEnv* _jni_env;
126 bool _exception_detected;
127 bool _exception_caught;
128 #if 0
129 JNIHandleBlock* _hblock;
130 #endif
132 public:
133 JvmtiEventMark(JavaThread *thread) : _thread(thread),
134 _jni_env(thread->jni_environment()) {
135 #if 0
136 _hblock = thread->active_handles();
137 _hblock->clear_thoroughly(); // so we can be safe
138 #else
139 // we want to use the code above - but that needs the JNIHandle changes - later...
140 // for now, steal JNI push local frame code
141 JvmtiThreadState *state = thread->jvmti_thread_state();
142 // we are before an event.
143 // Save current jvmti thread exception state.
144 if (state != NULL) {
145 _exception_detected = state->is_exception_detected();
146 _exception_caught = state->is_exception_caught();
147 } else {
148 _exception_detected = false;
149 _exception_caught = false;
150 }
152 JNIHandleBlock* old_handles = thread->active_handles();
153 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread);
154 assert(new_handles != NULL, "should not be NULL");
155 new_handles->set_pop_frame_link(old_handles);
156 thread->set_active_handles(new_handles);
157 #endif
158 assert(thread == JavaThread::current(), "thread must be current!");
159 thread->frame_anchor()->make_walkable(thread);
160 };
162 ~JvmtiEventMark() {
163 #if 0
164 _hblock->clear(); // for consistency with future correct behavior
165 #else
166 // we want to use the code above - but that needs the JNIHandle changes - later...
167 // for now, steal JNI pop local frame code
168 JNIHandleBlock* old_handles = _thread->active_handles();
169 JNIHandleBlock* new_handles = old_handles->pop_frame_link();
170 assert(new_handles != NULL, "should not be NULL");
171 _thread->set_active_handles(new_handles);
172 // Note that we set the pop_frame_link to NULL explicitly, otherwise
173 // the release_block call will release the blocks.
174 old_handles->set_pop_frame_link(NULL);
175 JNIHandleBlock::release_block(old_handles, _thread); // may block
176 #endif
178 JvmtiThreadState* state = _thread->jvmti_thread_state();
179 // we are continuing after an event.
180 if (state != NULL) {
181 // Restore the jvmti thread exception state.
182 if (_exception_detected) {
183 state->set_exception_detected();
184 }
185 if (_exception_caught) {
186 state->set_exception_caught();
187 }
188 }
189 }
191 #if 0
192 jobject to_jobject(oop obj) { return obj == NULL? NULL : _hblock->allocate_handle_fast(obj); }
193 #else
194 // we want to use the code above - but that needs the JNIHandle changes - later...
195 // for now, use regular make_local
196 jobject to_jobject(oop obj) { return JNIHandles::make_local(_thread,obj); }
197 #endif
199 jclass to_jclass(klassOop klass) { return (klass == NULL ? NULL : (jclass)to_jobject(Klass::cast(klass)->java_mirror())); }
201 jmethodID to_jmethodID(methodHandle method) { return method->jmethod_id(); }
203 JNIEnv* jni_env() { return _jni_env; }
204 };
206 class JvmtiThreadEventMark : public JvmtiEventMark {
207 private:
208 jthread _jt;
210 public:
211 JvmtiThreadEventMark(JavaThread *thread) :
212 JvmtiEventMark(thread) {
213 _jt = (jthread)(to_jobject(thread->threadObj()));
214 };
215 jthread jni_thread() { return _jt; }
216 };
218 class JvmtiClassEventMark : public JvmtiThreadEventMark {
219 private:
220 jclass _jc;
222 public:
223 JvmtiClassEventMark(JavaThread *thread, klassOop klass) :
224 JvmtiThreadEventMark(thread) {
225 _jc = to_jclass(klass);
226 };
227 jclass jni_class() { return _jc; }
228 };
230 class JvmtiMethodEventMark : public JvmtiThreadEventMark {
231 private:
232 jmethodID _mid;
234 public:
235 JvmtiMethodEventMark(JavaThread *thread, methodHandle method) :
236 JvmtiThreadEventMark(thread),
237 _mid(to_jmethodID(method)) {};
238 jmethodID jni_methodID() { return _mid; }
239 };
241 class JvmtiLocationEventMark : public JvmtiMethodEventMark {
242 private:
243 jlocation _loc;
245 public:
246 JvmtiLocationEventMark(JavaThread *thread, methodHandle method, address location) :
247 JvmtiMethodEventMark(thread, method),
248 _loc(location - method->code_base()) {};
249 jlocation location() { return _loc; }
250 };
252 class JvmtiExceptionEventMark : public JvmtiLocationEventMark {
253 private:
254 jobject _exc;
256 public:
257 JvmtiExceptionEventMark(JavaThread *thread, methodHandle method, address location, Handle exception) :
258 JvmtiLocationEventMark(thread, method, location),
259 _exc(to_jobject(exception())) {};
260 jobject exception() { return _exc; }
261 };
263 class JvmtiClassFileLoadEventMark : public JvmtiThreadEventMark {
264 private:
265 const char *_class_name;
266 jobject _jloader;
267 jobject _protection_domain;
268 jclass _class_being_redefined;
270 public:
271 JvmtiClassFileLoadEventMark(JavaThread *thread, Symbol* name,
272 Handle class_loader, Handle prot_domain, KlassHandle *class_being_redefined) : JvmtiThreadEventMark(thread) {
273 _class_name = name != NULL? name->as_utf8() : NULL;
274 _jloader = (jobject)to_jobject(class_loader());
275 _protection_domain = (jobject)to_jobject(prot_domain());
276 if (class_being_redefined == NULL) {
277 _class_being_redefined = NULL;
278 } else {
279 _class_being_redefined = (jclass)to_jclass((*class_being_redefined)());
280 }
281 };
282 const char *class_name() {
283 return _class_name;
284 }
285 jobject jloader() {
286 return _jloader;
287 }
288 jobject protection_domain() {
289 return _protection_domain;
290 }
291 jclass class_being_redefined() {
292 return _class_being_redefined;
293 }
294 };
296 //////////////////////////////////////////////////////////////////////////////
298 int JvmtiExport::_field_access_count = 0;
299 int JvmtiExport::_field_modification_count = 0;
301 bool JvmtiExport::_can_access_local_variables = false;
302 bool JvmtiExport::_can_hotswap_or_post_breakpoint = false;
303 bool JvmtiExport::_can_modify_any_class = false;
304 bool JvmtiExport::_can_walk_any_space = false;
306 bool JvmtiExport::_has_redefined_a_class = false;
307 bool JvmtiExport::_all_dependencies_are_recorded = false;
309 //
310 // field access management
311 //
313 // interpreter generator needs the address of the counter
314 address JvmtiExport::get_field_access_count_addr() {
315 // We don't grab a lock because we don't want to
316 // serialize field access between all threads. This means that a
317 // thread on another processor can see the wrong count value and
318 // may either miss making a needed call into post_field_access()
319 // or will make an unneeded call into post_field_access(). We pay
320 // this price to avoid slowing down the VM when we aren't watching
321 // field accesses.
322 // Other access/mutation safe by virtue of being in VM state.
323 return (address)(&_field_access_count);
324 }
326 //
327 // field modification management
328 //
330 // interpreter generator needs the address of the counter
331 address JvmtiExport::get_field_modification_count_addr() {
332 // We don't grab a lock because we don't
333 // want to serialize field modification between all threads. This
334 // means that a thread on another processor can see the wrong
335 // count value and may either miss making a needed call into
336 // post_field_modification() or will make an unneeded call into
337 // post_field_modification(). We pay this price to avoid slowing
338 // down the VM when we aren't watching field modifications.
339 // Other access/mutation safe by virtue of being in VM state.
340 return (address)(&_field_modification_count);
341 }
344 ///////////////////////////////////////////////////////////////
345 // Functions needed by java.lang.instrument for starting up javaagent.
346 ///////////////////////////////////////////////////////////////
348 jint
349 JvmtiExport::get_jvmti_interface(JavaVM *jvm, void **penv, jint version) {
350 // The JVMTI_VERSION_INTERFACE_JVMTI part of the version number
351 // has already been validated in JNI GetEnv().
352 int major, minor, micro;
354 // micro version doesn't matter here (yet?)
355 decode_version_values(version, &major, &minor, µ);
356 switch (major) {
357 case 1:
358 switch (minor) {
359 case 0: // version 1.0.<micro> is recognized
360 case 1: // version 1.1.<micro> is recognized
361 case 2: // version 1.2.<micro> is recognized
362 break;
364 default:
365 return JNI_EVERSION; // unsupported minor version number
366 }
367 break;
368 default:
369 return JNI_EVERSION; // unsupported major version number
370 }
372 if (JvmtiEnv::get_phase() == JVMTI_PHASE_LIVE) {
373 JavaThread* current_thread = (JavaThread*) ThreadLocalStorage::thread();
374 // transition code: native to VM
375 ThreadInVMfromNative __tiv(current_thread);
376 __ENTRY(jvmtiEnv*, JvmtiExport::get_jvmti_interface, current_thread)
377 debug_only(VMNativeEntryWrapper __vew;)
379 JvmtiEnv *jvmti_env = JvmtiEnv::create_a_jvmti(version);
380 *penv = jvmti_env->jvmti_external(); // actual type is jvmtiEnv* -- not to be confused with JvmtiEnv*
381 return JNI_OK;
383 } else if (JvmtiEnv::get_phase() == JVMTI_PHASE_ONLOAD) {
384 // not live, no thread to transition
385 JvmtiEnv *jvmti_env = JvmtiEnv::create_a_jvmti(version);
386 *penv = jvmti_env->jvmti_external(); // actual type is jvmtiEnv* -- not to be confused with JvmtiEnv*
387 return JNI_OK;
389 } else {
390 // Called at the wrong time
391 *penv = NULL;
392 return JNI_EDETACHED;
393 }
394 }
397 void
398 JvmtiExport::decode_version_values(jint version, int * major, int * minor,
399 int * micro) {
400 *major = (version & JVMTI_VERSION_MASK_MAJOR) >> JVMTI_VERSION_SHIFT_MAJOR;
401 *minor = (version & JVMTI_VERSION_MASK_MINOR) >> JVMTI_VERSION_SHIFT_MINOR;
402 *micro = (version & JVMTI_VERSION_MASK_MICRO) >> JVMTI_VERSION_SHIFT_MICRO;
403 }
405 void JvmtiExport::enter_primordial_phase() {
406 JvmtiEnvBase::set_phase(JVMTI_PHASE_PRIMORDIAL);
407 }
409 void JvmtiExport::enter_start_phase() {
410 JvmtiManageCapabilities::recompute_always_capabilities();
411 JvmtiEnvBase::set_phase(JVMTI_PHASE_START);
412 }
414 void JvmtiExport::enter_onload_phase() {
415 JvmtiEnvBase::set_phase(JVMTI_PHASE_ONLOAD);
416 }
418 void JvmtiExport::enter_live_phase() {
419 JvmtiEnvBase::set_phase(JVMTI_PHASE_LIVE);
420 }
422 //
423 // JVMTI events that the VM posts to the debugger and also startup agent
424 // and call the agent's premain() for java.lang.instrument.
425 //
427 void JvmtiExport::post_vm_start() {
428 EVT_TRIG_TRACE(JVMTI_EVENT_VM_START, ("JVMTI Trg VM start event triggered" ));
430 // can now enable some events
431 JvmtiEventController::vm_start();
433 JvmtiEnvIterator it;
434 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
435 if (env->is_enabled(JVMTI_EVENT_VM_START)) {
436 EVT_TRACE(JVMTI_EVENT_VM_START, ("JVMTI Evt VM start event sent" ));
438 JavaThread *thread = JavaThread::current();
439 JvmtiThreadEventMark jem(thread);
440 JvmtiJavaThreadEventTransition jet(thread);
441 jvmtiEventVMStart callback = env->callbacks()->VMStart;
442 if (callback != NULL) {
443 (*callback)(env->jvmti_external(), jem.jni_env());
444 }
445 }
446 }
447 }
450 void JvmtiExport::post_vm_initialized() {
451 EVT_TRIG_TRACE(JVMTI_EVENT_VM_INIT, ("JVMTI Trg VM init event triggered" ));
453 // can now enable events
454 JvmtiEventController::vm_init();
456 JvmtiEnvIterator it;
457 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
458 if (env->is_enabled(JVMTI_EVENT_VM_INIT)) {
459 EVT_TRACE(JVMTI_EVENT_VM_INIT, ("JVMTI Evt VM init event sent" ));
461 JavaThread *thread = JavaThread::current();
462 JvmtiThreadEventMark jem(thread);
463 JvmtiJavaThreadEventTransition jet(thread);
464 jvmtiEventVMInit callback = env->callbacks()->VMInit;
465 if (callback != NULL) {
466 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread());
467 }
468 }
469 }
470 }
473 void JvmtiExport::post_vm_death() {
474 EVT_TRIG_TRACE(JVMTI_EVENT_VM_DEATH, ("JVMTI Trg VM death event triggered" ));
476 JvmtiEnvIterator it;
477 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
478 if (env->is_enabled(JVMTI_EVENT_VM_DEATH)) {
479 EVT_TRACE(JVMTI_EVENT_VM_DEATH, ("JVMTI Evt VM death event sent" ));
481 JavaThread *thread = JavaThread::current();
482 JvmtiEventMark jem(thread);
483 JvmtiJavaThreadEventTransition jet(thread);
484 jvmtiEventVMDeath callback = env->callbacks()->VMDeath;
485 if (callback != NULL) {
486 (*callback)(env->jvmti_external(), jem.jni_env());
487 }
488 }
489 }
491 JvmtiEnvBase::set_phase(JVMTI_PHASE_DEAD);
492 JvmtiEventController::vm_death();
493 }
495 char**
496 JvmtiExport::get_all_native_method_prefixes(int* count_ptr) {
497 // Have to grab JVMTI thread state lock to be sure environment doesn't
498 // go away while we iterate them. No locks during VM bring-up.
499 if (Threads::number_of_threads() == 0 || SafepointSynchronize::is_at_safepoint()) {
500 return JvmtiEnvBase::get_all_native_method_prefixes(count_ptr);
501 } else {
502 MutexLocker mu(JvmtiThreadState_lock);
503 return JvmtiEnvBase::get_all_native_method_prefixes(count_ptr);
504 }
505 }
507 class JvmtiClassFileLoadHookPoster : public StackObj {
508 private:
509 Symbol* _h_name;
510 Handle _class_loader;
511 Handle _h_protection_domain;
512 unsigned char ** _data_ptr;
513 unsigned char ** _end_ptr;
514 JavaThread * _thread;
515 jint _curr_len;
516 unsigned char * _curr_data;
517 JvmtiEnv * _curr_env;
518 jint * _cached_length_ptr;
519 unsigned char ** _cached_data_ptr;
520 JvmtiThreadState * _state;
521 KlassHandle * _h_class_being_redefined;
522 JvmtiClassLoadKind _load_kind;
524 public:
525 inline JvmtiClassFileLoadHookPoster(Symbol* h_name, Handle class_loader,
526 Handle h_protection_domain,
527 unsigned char **data_ptr, unsigned char **end_ptr,
528 unsigned char **cached_data_ptr,
529 jint *cached_length_ptr) {
530 _h_name = h_name;
531 _class_loader = class_loader;
532 _h_protection_domain = h_protection_domain;
533 _data_ptr = data_ptr;
534 _end_ptr = end_ptr;
535 _thread = JavaThread::current();
536 _curr_len = *end_ptr - *data_ptr;
537 _curr_data = *data_ptr;
538 _curr_env = NULL;
539 _cached_length_ptr = cached_length_ptr;
540 _cached_data_ptr = cached_data_ptr;
541 *_cached_length_ptr = 0;
542 *_cached_data_ptr = NULL;
544 _state = _thread->jvmti_thread_state();
545 if (_state != NULL) {
546 _h_class_being_redefined = _state->get_class_being_redefined();
547 _load_kind = _state->get_class_load_kind();
548 // Clear class_being_redefined flag here. The action
549 // from agent handler could generate a new class file load
550 // hook event and if it is not cleared the new event generated
551 // from regular class file load could have this stale redefined
552 // class handle info.
553 _state->clear_class_being_redefined();
554 } else {
555 // redefine and retransform will always set the thread state
556 _h_class_being_redefined = (KlassHandle *) NULL;
557 _load_kind = jvmti_class_load_kind_load;
558 }
559 }
561 void post() {
562 // EVT_TRIG_TRACE(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK,
563 // ("JVMTI [%s] class file load hook event triggered",
564 // JvmtiTrace::safe_get_thread_name(_thread)));
565 post_all_envs();
566 copy_modified_data();
567 }
569 private:
570 void post_all_envs() {
571 if (_load_kind != jvmti_class_load_kind_retransform) {
572 // for class load and redefine,
573 // call the non-retransformable agents
574 JvmtiEnvIterator it;
575 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
576 if (!env->is_retransformable() && env->is_enabled(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK)) {
577 // non-retransformable agents cannot retransform back,
578 // so no need to cache the original class file bytes
579 post_to_env(env, false);
580 }
581 }
582 }
583 JvmtiEnvIterator it;
584 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
585 // retransformable agents get all events
586 if (env->is_retransformable() && env->is_enabled(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK)) {
587 // retransformable agents need to cache the original class file
588 // bytes if changes are made via the ClassFileLoadHook
589 post_to_env(env, true);
590 }
591 }
592 }
594 void post_to_env(JvmtiEnv* env, bool caching_needed) {
595 unsigned char *new_data = NULL;
596 jint new_len = 0;
597 // EVT_TRACE(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK,
598 // ("JVMTI [%s] class file load hook event sent %s data_ptr = %d, data_len = %d",
599 // JvmtiTrace::safe_get_thread_name(_thread),
600 // _h_name == NULL ? "NULL" : _h_name->as_utf8(),
601 // _curr_data, _curr_len ));
602 JvmtiClassFileLoadEventMark jem(_thread, _h_name, _class_loader,
603 _h_protection_domain,
604 _h_class_being_redefined);
605 JvmtiJavaThreadEventTransition jet(_thread);
606 JNIEnv* jni_env = (JvmtiEnv::get_phase() == JVMTI_PHASE_PRIMORDIAL)?
607 NULL : jem.jni_env();
608 jvmtiEventClassFileLoadHook callback = env->callbacks()->ClassFileLoadHook;
609 if (callback != NULL) {
610 (*callback)(env->jvmti_external(), jni_env,
611 jem.class_being_redefined(),
612 jem.jloader(), jem.class_name(),
613 jem.protection_domain(),
614 _curr_len, _curr_data,
615 &new_len, &new_data);
616 }
617 if (new_data != NULL) {
618 // this agent has modified class data.
619 if (caching_needed && *_cached_data_ptr == NULL) {
620 // data has been changed by the new retransformable agent
621 // and it hasn't already been cached, cache it
622 *_cached_data_ptr = (unsigned char *)os::malloc(_curr_len);
623 memcpy(*_cached_data_ptr, _curr_data, _curr_len);
624 *_cached_length_ptr = _curr_len;
625 }
627 if (_curr_data != *_data_ptr) {
628 // curr_data is previous agent modified class data.
629 // And this has been changed by the new agent so
630 // we can delete it now.
631 _curr_env->Deallocate(_curr_data);
632 }
634 // Class file data has changed by the current agent.
635 _curr_data = new_data;
636 _curr_len = new_len;
637 // Save the current agent env we need this to deallocate the
638 // memory allocated by this agent.
639 _curr_env = env;
640 }
641 }
643 void copy_modified_data() {
644 // if one of the agent has modified class file data.
645 // Copy modified class data to new resources array.
646 if (_curr_data != *_data_ptr) {
647 *_data_ptr = NEW_RESOURCE_ARRAY(u1, _curr_len);
648 memcpy(*_data_ptr, _curr_data, _curr_len);
649 *_end_ptr = *_data_ptr + _curr_len;
650 _curr_env->Deallocate(_curr_data);
651 }
652 }
653 };
655 bool JvmtiExport::_should_post_class_file_load_hook = false;
657 // this entry is for class file load hook on class load, redefine and retransform
658 void JvmtiExport::post_class_file_load_hook(Symbol* h_name,
659 Handle class_loader,
660 Handle h_protection_domain,
661 unsigned char **data_ptr,
662 unsigned char **end_ptr,
663 unsigned char **cached_data_ptr,
664 jint *cached_length_ptr) {
665 JvmtiClassFileLoadHookPoster poster(h_name, class_loader,
666 h_protection_domain,
667 data_ptr, end_ptr,
668 cached_data_ptr,
669 cached_length_ptr);
670 poster.post();
671 }
673 void JvmtiExport::report_unsupported(bool on) {
674 // If any JVMTI service is turned on, we need to exit before native code
675 // tries to access nonexistant services.
676 if (on) {
677 vm_exit_during_initialization("Java Kernel does not support JVMTI.");
678 }
679 }
682 #ifndef JVMTI_KERNEL
683 static inline klassOop oop_to_klassOop(oop obj) {
684 klassOop k = obj->klass();
686 // if the object is a java.lang.Class then return the java mirror
687 if (k == SystemDictionary::Class_klass()) {
688 if (!java_lang_Class::is_primitive(obj)) {
689 k = java_lang_Class::as_klassOop(obj);
690 assert(k != NULL, "class for non-primitive mirror must exist");
691 }
692 }
693 return k;
694 }
696 class JvmtiVMObjectAllocEventMark : public JvmtiClassEventMark {
697 private:
698 jobject _jobj;
699 jlong _size;
700 public:
701 JvmtiVMObjectAllocEventMark(JavaThread *thread, oop obj) : JvmtiClassEventMark(thread, oop_to_klassOop(obj)) {
702 _jobj = (jobject)to_jobject(obj);
703 _size = obj->size() * wordSize;
704 };
705 jobject jni_jobject() { return _jobj; }
706 jlong size() { return _size; }
707 };
709 class JvmtiCompiledMethodLoadEventMark : public JvmtiMethodEventMark {
710 private:
711 jint _code_size;
712 const void *_code_data;
713 jint _map_length;
714 jvmtiAddrLocationMap *_map;
715 const void *_compile_info;
716 public:
717 JvmtiCompiledMethodLoadEventMark(JavaThread *thread, nmethod *nm, void* compile_info_ptr = NULL)
718 : JvmtiMethodEventMark(thread,methodHandle(thread, nm->method())) {
719 _code_data = nm->insts_begin();
720 _code_size = nm->insts_size();
721 _compile_info = compile_info_ptr; // Set void pointer of compiledMethodLoad Event. Default value is NULL.
722 JvmtiCodeBlobEvents::build_jvmti_addr_location_map(nm, &_map, &_map_length);
723 }
724 ~JvmtiCompiledMethodLoadEventMark() {
725 FREE_C_HEAP_ARRAY(jvmtiAddrLocationMap, _map);
726 }
728 jint code_size() { return _code_size; }
729 const void *code_data() { return _code_data; }
730 jint map_length() { return _map_length; }
731 const jvmtiAddrLocationMap* map() { return _map; }
732 const void *compile_info() { return _compile_info; }
733 };
737 class JvmtiMonitorEventMark : public JvmtiThreadEventMark {
738 private:
739 jobject _jobj;
740 public:
741 JvmtiMonitorEventMark(JavaThread *thread, oop object)
742 : JvmtiThreadEventMark(thread){
743 _jobj = to_jobject(object);
744 }
745 jobject jni_object() { return _jobj; }
746 };
748 ///////////////////////////////////////////////////////////////
749 //
750 // pending CompiledMethodUnload support
751 //
753 void JvmtiExport::post_compiled_method_unload(
754 jmethodID method, const void *code_begin) {
755 JavaThread* thread = JavaThread::current();
756 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_UNLOAD,
757 ("JVMTI [%s] method compile unload event triggered",
758 JvmtiTrace::safe_get_thread_name(thread)));
760 // post the event for each environment that has this event enabled.
761 JvmtiEnvIterator it;
762 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
763 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_UNLOAD)) {
765 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_UNLOAD,
766 ("JVMTI [%s] class compile method unload event sent jmethodID " PTR_FORMAT,
767 JvmtiTrace::safe_get_thread_name(thread), method));
769 ResourceMark rm(thread);
771 JvmtiEventMark jem(thread);
772 JvmtiJavaThreadEventTransition jet(thread);
773 jvmtiEventCompiledMethodUnload callback = env->callbacks()->CompiledMethodUnload;
774 if (callback != NULL) {
775 (*callback)(env->jvmti_external(), method, code_begin);
776 }
777 }
778 }
779 }
781 ///////////////////////////////////////////////////////////////
782 //
783 // JvmtiExport
784 //
786 void JvmtiExport::post_raw_breakpoint(JavaThread *thread, methodOop method, address location) {
787 HandleMark hm(thread);
788 methodHandle mh(thread, method);
790 JvmtiThreadState *state = thread->jvmti_thread_state();
791 if (state == NULL) {
792 return;
793 }
794 EVT_TRIG_TRACE(JVMTI_EVENT_BREAKPOINT, ("JVMTI [%s] Trg Breakpoint triggered",
795 JvmtiTrace::safe_get_thread_name(thread)));
796 JvmtiEnvThreadStateIterator it(state);
797 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
798 ets->compare_and_set_current_location(mh(), location, JVMTI_EVENT_BREAKPOINT);
799 if (!ets->breakpoint_posted() && ets->is_enabled(JVMTI_EVENT_BREAKPOINT)) {
800 ThreadState old_os_state = thread->osthread()->get_state();
801 thread->osthread()->set_state(BREAKPOINTED);
802 EVT_TRACE(JVMTI_EVENT_BREAKPOINT, ("JVMTI [%s] Evt Breakpoint sent %s.%s @ %d",
803 JvmtiTrace::safe_get_thread_name(thread),
804 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
805 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
806 location - mh()->code_base() ));
808 JvmtiEnv *env = ets->get_env();
809 JvmtiLocationEventMark jem(thread, mh, location);
810 JvmtiJavaThreadEventTransition jet(thread);
811 jvmtiEventBreakpoint callback = env->callbacks()->Breakpoint;
812 if (callback != NULL) {
813 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
814 jem.jni_methodID(), jem.location());
815 }
817 ets->set_breakpoint_posted();
818 thread->osthread()->set_state(old_os_state);
819 }
820 }
821 }
823 //////////////////////////////////////////////////////////////////////////////
825 bool JvmtiExport::_can_get_source_debug_extension = false;
826 bool JvmtiExport::_can_maintain_original_method_order = false;
827 bool JvmtiExport::_can_post_interpreter_events = false;
828 bool JvmtiExport::_can_post_on_exceptions = false;
829 bool JvmtiExport::_can_post_breakpoint = false;
830 bool JvmtiExport::_can_post_field_access = false;
831 bool JvmtiExport::_can_post_field_modification = false;
832 bool JvmtiExport::_can_post_method_entry = false;
833 bool JvmtiExport::_can_post_method_exit = false;
834 bool JvmtiExport::_can_pop_frame = false;
835 bool JvmtiExport::_can_force_early_return = false;
837 bool JvmtiExport::_should_post_single_step = false;
838 bool JvmtiExport::_should_post_field_access = false;
839 bool JvmtiExport::_should_post_field_modification = false;
840 bool JvmtiExport::_should_post_class_load = false;
841 bool JvmtiExport::_should_post_class_prepare = false;
842 bool JvmtiExport::_should_post_class_unload = false;
843 bool JvmtiExport::_should_post_thread_life = false;
844 bool JvmtiExport::_should_clean_up_heap_objects = false;
845 bool JvmtiExport::_should_post_native_method_bind = false;
846 bool JvmtiExport::_should_post_dynamic_code_generated = false;
847 bool JvmtiExport::_should_post_data_dump = false;
848 bool JvmtiExport::_should_post_compiled_method_load = false;
849 bool JvmtiExport::_should_post_compiled_method_unload = false;
850 bool JvmtiExport::_should_post_monitor_contended_enter = false;
851 bool JvmtiExport::_should_post_monitor_contended_entered = false;
852 bool JvmtiExport::_should_post_monitor_wait = false;
853 bool JvmtiExport::_should_post_monitor_waited = false;
854 bool JvmtiExport::_should_post_garbage_collection_start = false;
855 bool JvmtiExport::_should_post_garbage_collection_finish = false;
856 bool JvmtiExport::_should_post_object_free = false;
857 bool JvmtiExport::_should_post_resource_exhausted = false;
858 bool JvmtiExport::_should_post_vm_object_alloc = false;
859 bool JvmtiExport::_should_post_on_exceptions = false;
861 ////////////////////////////////////////////////////////////////////////////////////////////////
864 //
865 // JVMTI single step management
866 //
867 void JvmtiExport::at_single_stepping_point(JavaThread *thread, methodOop method, address location) {
868 assert(JvmtiExport::should_post_single_step(), "must be single stepping");
870 HandleMark hm(thread);
871 methodHandle mh(thread, method);
873 // update information about current location and post a step event
874 JvmtiThreadState *state = thread->jvmti_thread_state();
875 if (state == NULL) {
876 return;
877 }
878 EVT_TRIG_TRACE(JVMTI_EVENT_SINGLE_STEP, ("JVMTI [%s] Trg Single Step triggered",
879 JvmtiTrace::safe_get_thread_name(thread)));
880 if (!state->hide_single_stepping()) {
881 if (state->is_pending_step_for_popframe()) {
882 state->process_pending_step_for_popframe();
883 }
884 if (state->is_pending_step_for_earlyret()) {
885 state->process_pending_step_for_earlyret();
886 }
887 JvmtiExport::post_single_step(thread, mh(), location);
888 }
889 }
892 void JvmtiExport::expose_single_stepping(JavaThread *thread) {
893 JvmtiThreadState *state = thread->jvmti_thread_state();
894 if (state != NULL) {
895 state->clear_hide_single_stepping();
896 }
897 }
900 bool JvmtiExport::hide_single_stepping(JavaThread *thread) {
901 JvmtiThreadState *state = thread->jvmti_thread_state();
902 if (state != NULL && state->is_enabled(JVMTI_EVENT_SINGLE_STEP)) {
903 state->set_hide_single_stepping();
904 return true;
905 } else {
906 return false;
907 }
908 }
910 void JvmtiExport::post_class_load(JavaThread *thread, klassOop klass) {
911 HandleMark hm(thread);
912 KlassHandle kh(thread, klass);
914 EVT_TRIG_TRACE(JVMTI_EVENT_CLASS_LOAD, ("JVMTI [%s] Trg Class Load triggered",
915 JvmtiTrace::safe_get_thread_name(thread)));
916 JvmtiThreadState* state = thread->jvmti_thread_state();
917 if (state == NULL) {
918 return;
919 }
920 JvmtiEnvThreadStateIterator it(state);
921 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
922 if (ets->is_enabled(JVMTI_EVENT_CLASS_LOAD)) {
923 EVT_TRACE(JVMTI_EVENT_CLASS_LOAD, ("JVMTI [%s] Evt Class Load sent %s",
924 JvmtiTrace::safe_get_thread_name(thread),
925 kh()==NULL? "NULL" : Klass::cast(kh())->external_name() ));
927 JvmtiEnv *env = ets->get_env();
928 JvmtiClassEventMark jem(thread, kh());
929 JvmtiJavaThreadEventTransition jet(thread);
930 jvmtiEventClassLoad callback = env->callbacks()->ClassLoad;
931 if (callback != NULL) {
932 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_class());
933 }
934 }
935 }
936 }
939 void JvmtiExport::post_class_prepare(JavaThread *thread, klassOop klass) {
940 HandleMark hm(thread);
941 KlassHandle kh(thread, klass);
943 EVT_TRIG_TRACE(JVMTI_EVENT_CLASS_PREPARE, ("JVMTI [%s] Trg Class Prepare triggered",
944 JvmtiTrace::safe_get_thread_name(thread)));
945 JvmtiThreadState* state = thread->jvmti_thread_state();
946 if (state == NULL) {
947 return;
948 }
949 JvmtiEnvThreadStateIterator it(state);
950 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
951 if (ets->is_enabled(JVMTI_EVENT_CLASS_PREPARE)) {
952 EVT_TRACE(JVMTI_EVENT_CLASS_PREPARE, ("JVMTI [%s] Evt Class Prepare sent %s",
953 JvmtiTrace::safe_get_thread_name(thread),
954 kh()==NULL? "NULL" : Klass::cast(kh())->external_name() ));
956 JvmtiEnv *env = ets->get_env();
957 JvmtiClassEventMark jem(thread, kh());
958 JvmtiJavaThreadEventTransition jet(thread);
959 jvmtiEventClassPrepare callback = env->callbacks()->ClassPrepare;
960 if (callback != NULL) {
961 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_class());
962 }
963 }
964 }
965 }
967 void JvmtiExport::post_class_unload(klassOop klass) {
968 Thread *thread = Thread::current();
969 HandleMark hm(thread);
970 KlassHandle kh(thread, klass);
972 EVT_TRIG_TRACE(EXT_EVENT_CLASS_UNLOAD, ("JVMTI [?] Trg Class Unload triggered" ));
973 if (JvmtiEventController::is_enabled((jvmtiEvent)EXT_EVENT_CLASS_UNLOAD)) {
974 assert(thread->is_VM_thread(), "wrong thread");
976 // get JavaThread for whom we are proxy
977 JavaThread *real_thread =
978 (JavaThread *)((VMThread *)thread)->vm_operation()->calling_thread();
980 JvmtiEnvIterator it;
981 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
982 if (env->is_enabled((jvmtiEvent)EXT_EVENT_CLASS_UNLOAD)) {
983 EVT_TRACE(EXT_EVENT_CLASS_UNLOAD, ("JVMTI [?] Evt Class Unload sent %s",
984 kh()==NULL? "NULL" : Klass::cast(kh())->external_name() ));
986 // do everything manually, since this is a proxy - needs special care
987 JNIEnv* jni_env = real_thread->jni_environment();
988 jthread jt = (jthread)JNIHandles::make_local(real_thread, real_thread->threadObj());
989 jclass jk = (jclass)JNIHandles::make_local(real_thread, Klass::cast(kh())->java_mirror());
991 // Before we call the JVMTI agent, we have to set the state in the
992 // thread for which we are proxying.
993 JavaThreadState prev_state = real_thread->thread_state();
994 assert(prev_state == _thread_blocked, "JavaThread should be at safepoint");
995 real_thread->set_thread_state(_thread_in_native);
997 jvmtiExtensionEvent callback = env->ext_callbacks()->ClassUnload;
998 if (callback != NULL) {
999 (*callback)(env->jvmti_external(), jni_env, jt, jk);
1000 }
1002 assert(real_thread->thread_state() == _thread_in_native,
1003 "JavaThread should be in native");
1004 real_thread->set_thread_state(prev_state);
1006 JNIHandles::destroy_local(jk);
1007 JNIHandles::destroy_local(jt);
1008 }
1009 }
1010 }
1011 }
1014 void JvmtiExport::post_thread_start(JavaThread *thread) {
1015 assert(thread->thread_state() == _thread_in_vm, "must be in vm state");
1017 EVT_TRIG_TRACE(JVMTI_EVENT_THREAD_START, ("JVMTI [%s] Trg Thread Start event triggered",
1018 JvmtiTrace::safe_get_thread_name(thread)));
1020 // do JVMTI thread initialization (if needed)
1021 JvmtiEventController::thread_started(thread);
1023 // Do not post thread start event for hidden java thread.
1024 if (JvmtiEventController::is_enabled(JVMTI_EVENT_THREAD_START) &&
1025 !thread->is_hidden_from_external_view()) {
1026 JvmtiEnvIterator it;
1027 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1028 if (env->is_enabled(JVMTI_EVENT_THREAD_START)) {
1029 EVT_TRACE(JVMTI_EVENT_THREAD_START, ("JVMTI [%s] Evt Thread Start event sent",
1030 JvmtiTrace::safe_get_thread_name(thread) ));
1032 JvmtiThreadEventMark jem(thread);
1033 JvmtiJavaThreadEventTransition jet(thread);
1034 jvmtiEventThreadStart callback = env->callbacks()->ThreadStart;
1035 if (callback != NULL) {
1036 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread());
1037 }
1038 }
1039 }
1040 }
1041 }
1044 void JvmtiExport::post_thread_end(JavaThread *thread) {
1045 EVT_TRIG_TRACE(JVMTI_EVENT_THREAD_END, ("JVMTI [%s] Trg Thread End event triggered",
1046 JvmtiTrace::safe_get_thread_name(thread)));
1048 JvmtiThreadState *state = thread->jvmti_thread_state();
1049 if (state == NULL) {
1050 return;
1051 }
1053 // Do not post thread end event for hidden java thread.
1054 if (state->is_enabled(JVMTI_EVENT_THREAD_END) &&
1055 !thread->is_hidden_from_external_view()) {
1057 JvmtiEnvThreadStateIterator it(state);
1058 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1059 if (ets->is_enabled(JVMTI_EVENT_THREAD_END)) {
1060 EVT_TRACE(JVMTI_EVENT_THREAD_END, ("JVMTI [%s] Evt Thread End event sent",
1061 JvmtiTrace::safe_get_thread_name(thread) ));
1063 JvmtiEnv *env = ets->get_env();
1064 JvmtiThreadEventMark jem(thread);
1065 JvmtiJavaThreadEventTransition jet(thread);
1066 jvmtiEventThreadEnd callback = env->callbacks()->ThreadEnd;
1067 if (callback != NULL) {
1068 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread());
1069 }
1070 }
1071 }
1072 }
1073 }
1075 void JvmtiExport::post_object_free(JvmtiEnv* env, jlong tag) {
1076 assert(SafepointSynchronize::is_at_safepoint(), "must be executed at safepoint");
1077 assert(env->is_enabled(JVMTI_EVENT_OBJECT_FREE), "checking");
1079 EVT_TRIG_TRACE(JVMTI_EVENT_OBJECT_FREE, ("JVMTI [?] Trg Object Free triggered" ));
1080 EVT_TRACE(JVMTI_EVENT_OBJECT_FREE, ("JVMTI [?] Evt Object Free sent"));
1082 jvmtiEventObjectFree callback = env->callbacks()->ObjectFree;
1083 if (callback != NULL) {
1084 (*callback)(env->jvmti_external(), tag);
1085 }
1086 }
1088 void JvmtiExport::post_resource_exhausted(jint resource_exhausted_flags, const char* description) {
1089 EVT_TRIG_TRACE(JVMTI_EVENT_RESOURCE_EXHAUSTED, ("JVMTI Trg resource exhausted event triggered" ));
1091 JvmtiEnvIterator it;
1092 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1093 if (env->is_enabled(JVMTI_EVENT_RESOURCE_EXHAUSTED)) {
1094 EVT_TRACE(JVMTI_EVENT_RESOURCE_EXHAUSTED, ("JVMTI Evt resource exhausted event sent" ));
1096 JavaThread *thread = JavaThread::current();
1097 JvmtiThreadEventMark jem(thread);
1098 JvmtiJavaThreadEventTransition jet(thread);
1099 jvmtiEventResourceExhausted callback = env->callbacks()->ResourceExhausted;
1100 if (callback != NULL) {
1101 (*callback)(env->jvmti_external(), jem.jni_env(),
1102 resource_exhausted_flags, NULL, description);
1103 }
1104 }
1105 }
1106 }
1108 void JvmtiExport::post_method_entry(JavaThread *thread, methodOop method, frame current_frame) {
1109 HandleMark hm(thread);
1110 methodHandle mh(thread, method);
1112 EVT_TRIG_TRACE(JVMTI_EVENT_METHOD_ENTRY, ("JVMTI [%s] Trg Method Entry triggered %s.%s",
1113 JvmtiTrace::safe_get_thread_name(thread),
1114 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1115 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1117 JvmtiThreadState* state = thread->jvmti_thread_state();
1118 if (state == NULL || !state->is_interp_only_mode()) {
1119 // for any thread that actually wants method entry, interp_only_mode is set
1120 return;
1121 }
1123 state->incr_cur_stack_depth();
1125 if (state->is_enabled(JVMTI_EVENT_METHOD_ENTRY)) {
1126 JvmtiEnvThreadStateIterator it(state);
1127 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1128 if (ets->is_enabled(JVMTI_EVENT_METHOD_ENTRY)) {
1129 EVT_TRACE(JVMTI_EVENT_METHOD_ENTRY, ("JVMTI [%s] Evt Method Entry sent %s.%s",
1130 JvmtiTrace::safe_get_thread_name(thread),
1131 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1132 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1134 JvmtiEnv *env = ets->get_env();
1135 JvmtiMethodEventMark jem(thread, mh);
1136 JvmtiJavaThreadEventTransition jet(thread);
1137 jvmtiEventMethodEntry callback = env->callbacks()->MethodEntry;
1138 if (callback != NULL) {
1139 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_methodID());
1140 }
1141 }
1142 }
1143 }
1144 }
1146 void JvmtiExport::post_method_exit(JavaThread *thread, methodOop method, frame current_frame) {
1147 HandleMark hm(thread);
1148 methodHandle mh(thread, method);
1150 EVT_TRIG_TRACE(JVMTI_EVENT_METHOD_EXIT, ("JVMTI [%s] Trg Method Exit triggered %s.%s",
1151 JvmtiTrace::safe_get_thread_name(thread),
1152 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1153 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1155 JvmtiThreadState *state = thread->jvmti_thread_state();
1156 if (state == NULL || !state->is_interp_only_mode()) {
1157 // for any thread that actually wants method exit, interp_only_mode is set
1158 return;
1159 }
1161 // return a flag when a method terminates by throwing an exception
1162 // i.e. if an exception is thrown and it's not caught by the current method
1163 bool exception_exit = state->is_exception_detected() && !state->is_exception_caught();
1166 if (state->is_enabled(JVMTI_EVENT_METHOD_EXIT)) {
1167 Handle result;
1168 jvalue value;
1169 value.j = 0L;
1171 // if the method hasn't been popped because of an exception then we populate
1172 // the return_value parameter for the callback. At this point we only have
1173 // the address of a "raw result" and we just call into the interpreter to
1174 // convert this into a jvalue.
1175 if (!exception_exit) {
1176 oop oop_result;
1177 BasicType type = current_frame.interpreter_frame_result(&oop_result, &value);
1178 if (type == T_OBJECT || type == T_ARRAY) {
1179 result = Handle(thread, oop_result);
1180 }
1181 }
1183 JvmtiEnvThreadStateIterator it(state);
1184 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1185 if (ets->is_enabled(JVMTI_EVENT_METHOD_EXIT)) {
1186 EVT_TRACE(JVMTI_EVENT_METHOD_EXIT, ("JVMTI [%s] Evt Method Exit sent %s.%s",
1187 JvmtiTrace::safe_get_thread_name(thread),
1188 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1189 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1191 JvmtiEnv *env = ets->get_env();
1192 JvmtiMethodEventMark jem(thread, mh);
1193 if (result.not_null()) {
1194 value.l = JNIHandles::make_local(thread, result());
1195 }
1196 JvmtiJavaThreadEventTransition jet(thread);
1197 jvmtiEventMethodExit callback = env->callbacks()->MethodExit;
1198 if (callback != NULL) {
1199 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1200 jem.jni_methodID(), exception_exit, value);
1201 }
1202 }
1203 }
1204 }
1206 if (state->is_enabled(JVMTI_EVENT_FRAME_POP)) {
1207 JvmtiEnvThreadStateIterator it(state);
1208 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1209 int cur_frame_number = state->cur_stack_depth();
1211 if (ets->is_frame_pop(cur_frame_number)) {
1212 // we have a NotifyFramePop entry for this frame.
1213 // now check that this env/thread wants this event
1214 if (ets->is_enabled(JVMTI_EVENT_FRAME_POP)) {
1215 EVT_TRACE(JVMTI_EVENT_FRAME_POP, ("JVMTI [%s] Evt Frame Pop sent %s.%s",
1216 JvmtiTrace::safe_get_thread_name(thread),
1217 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1218 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1220 // we also need to issue a frame pop event for this frame
1221 JvmtiEnv *env = ets->get_env();
1222 JvmtiMethodEventMark jem(thread, mh);
1223 JvmtiJavaThreadEventTransition jet(thread);
1224 jvmtiEventFramePop callback = env->callbacks()->FramePop;
1225 if (callback != NULL) {
1226 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1227 jem.jni_methodID(), exception_exit);
1228 }
1229 }
1230 // remove the frame's entry
1231 ets->clear_frame_pop(cur_frame_number);
1232 }
1233 }
1234 }
1236 state->decr_cur_stack_depth();
1237 }
1240 // Todo: inline this for optimization
1241 void JvmtiExport::post_single_step(JavaThread *thread, methodOop method, address location) {
1242 HandleMark hm(thread);
1243 methodHandle mh(thread, method);
1245 JvmtiThreadState *state = thread->jvmti_thread_state();
1246 if (state == NULL) {
1247 return;
1248 }
1249 JvmtiEnvThreadStateIterator it(state);
1250 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1251 ets->compare_and_set_current_location(mh(), location, JVMTI_EVENT_SINGLE_STEP);
1252 if (!ets->single_stepping_posted() && ets->is_enabled(JVMTI_EVENT_SINGLE_STEP)) {
1253 EVT_TRACE(JVMTI_EVENT_SINGLE_STEP, ("JVMTI [%s] Evt Single Step sent %s.%s @ %d",
1254 JvmtiTrace::safe_get_thread_name(thread),
1255 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1256 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1257 location - mh()->code_base() ));
1259 JvmtiEnv *env = ets->get_env();
1260 JvmtiLocationEventMark jem(thread, mh, location);
1261 JvmtiJavaThreadEventTransition jet(thread);
1262 jvmtiEventSingleStep callback = env->callbacks()->SingleStep;
1263 if (callback != NULL) {
1264 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1265 jem.jni_methodID(), jem.location());
1266 }
1268 ets->set_single_stepping_posted();
1269 }
1270 }
1271 }
1274 void JvmtiExport::post_exception_throw(JavaThread *thread, methodOop method, address location, oop exception) {
1275 HandleMark hm(thread);
1276 methodHandle mh(thread, method);
1277 Handle exception_handle(thread, exception);
1279 JvmtiThreadState *state = thread->jvmti_thread_state();
1280 if (state == NULL) {
1281 return;
1282 }
1284 EVT_TRIG_TRACE(JVMTI_EVENT_EXCEPTION, ("JVMTI [%s] Trg Exception thrown triggered",
1285 JvmtiTrace::safe_get_thread_name(thread)));
1286 if (!state->is_exception_detected()) {
1287 state->set_exception_detected();
1288 JvmtiEnvThreadStateIterator it(state);
1289 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1290 if (ets->is_enabled(JVMTI_EVENT_EXCEPTION) && (exception != NULL)) {
1292 EVT_TRACE(JVMTI_EVENT_EXCEPTION,
1293 ("JVMTI [%s] Evt Exception thrown sent %s.%s @ %d",
1294 JvmtiTrace::safe_get_thread_name(thread),
1295 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1296 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1297 location - mh()->code_base() ));
1299 JvmtiEnv *env = ets->get_env();
1300 JvmtiExceptionEventMark jem(thread, mh, location, exception_handle);
1302 // It's okay to clear these exceptions here because we duplicate
1303 // this lookup in InterpreterRuntime::exception_handler_for_exception.
1304 EXCEPTION_MARK;
1306 bool should_repeat;
1307 vframeStream st(thread);
1308 assert(!st.at_end(), "cannot be at end");
1309 methodOop current_method = NULL;
1310 int current_bci = -1;
1311 do {
1312 current_method = st.method();
1313 current_bci = st.bci();
1314 do {
1315 should_repeat = false;
1316 KlassHandle eh_klass(thread, exception_handle()->klass());
1317 current_bci = current_method->fast_exception_handler_bci_for(
1318 eh_klass, current_bci, THREAD);
1319 if (HAS_PENDING_EXCEPTION) {
1320 exception_handle = KlassHandle(thread, PENDING_EXCEPTION);
1321 CLEAR_PENDING_EXCEPTION;
1322 should_repeat = true;
1323 }
1324 } while (should_repeat && (current_bci != -1));
1325 st.next();
1326 } while ((current_bci < 0) && (!st.at_end()));
1328 jmethodID catch_jmethodID;
1329 if (current_bci < 0) {
1330 catch_jmethodID = 0;
1331 current_bci = 0;
1332 } else {
1333 catch_jmethodID = jem.to_jmethodID(
1334 methodHandle(thread, current_method));
1335 }
1337 JvmtiJavaThreadEventTransition jet(thread);
1338 jvmtiEventException callback = env->callbacks()->Exception;
1339 if (callback != NULL) {
1340 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1341 jem.jni_methodID(), jem.location(),
1342 jem.exception(),
1343 catch_jmethodID, current_bci);
1344 }
1345 }
1346 }
1347 }
1349 // frames may get popped because of this throw, be safe - invalidate cached depth
1350 state->invalidate_cur_stack_depth();
1351 }
1354 void JvmtiExport::notice_unwind_due_to_exception(JavaThread *thread, methodOop method, address location, oop exception, bool in_handler_frame) {
1355 HandleMark hm(thread);
1356 methodHandle mh(thread, method);
1357 Handle exception_handle(thread, exception);
1359 JvmtiThreadState *state = thread->jvmti_thread_state();
1360 if (state == NULL) {
1361 return;
1362 }
1363 EVT_TRIG_TRACE(JVMTI_EVENT_EXCEPTION_CATCH,
1364 ("JVMTI [%s] Trg unwind_due_to_exception triggered %s.%s @ %s%d - %s",
1365 JvmtiTrace::safe_get_thread_name(thread),
1366 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1367 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1368 location==0? "no location:" : "",
1369 location==0? 0 : location - mh()->code_base(),
1370 in_handler_frame? "in handler frame" : "not handler frame" ));
1372 if (state->is_exception_detected()) {
1374 state->invalidate_cur_stack_depth();
1375 if (!in_handler_frame) {
1376 // Not in exception handler.
1377 if(state->is_interp_only_mode()) {
1378 // method exit and frame pop events are posted only in interp mode.
1379 // When these events are enabled code should be in running in interp mode.
1380 JvmtiExport::post_method_exit(thread, method, thread->last_frame());
1381 // The cached cur_stack_depth might have changed from the
1382 // operations of frame pop or method exit. We are not 100% sure
1383 // the cached cur_stack_depth is still valid depth so invalidate
1384 // it.
1385 state->invalidate_cur_stack_depth();
1386 }
1387 } else {
1388 // In exception handler frame. Report exception catch.
1389 assert(location != NULL, "must be a known location");
1390 // Update cur_stack_depth - the frames above the current frame
1391 // have been unwound due to this exception:
1392 assert(!state->is_exception_caught(), "exception must not be caught yet.");
1393 state->set_exception_caught();
1395 JvmtiEnvThreadStateIterator it(state);
1396 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1397 if (ets->is_enabled(JVMTI_EVENT_EXCEPTION_CATCH) && (exception_handle() != NULL)) {
1398 EVT_TRACE(JVMTI_EVENT_EXCEPTION_CATCH,
1399 ("JVMTI [%s] Evt ExceptionCatch sent %s.%s @ %d",
1400 JvmtiTrace::safe_get_thread_name(thread),
1401 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1402 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1403 location - mh()->code_base() ));
1405 JvmtiEnv *env = ets->get_env();
1406 JvmtiExceptionEventMark jem(thread, mh, location, exception_handle);
1407 JvmtiJavaThreadEventTransition jet(thread);
1408 jvmtiEventExceptionCatch callback = env->callbacks()->ExceptionCatch;
1409 if (callback != NULL) {
1410 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1411 jem.jni_methodID(), jem.location(),
1412 jem.exception());
1413 }
1414 }
1415 }
1416 }
1417 }
1418 }
1420 oop JvmtiExport::jni_GetField_probe(JavaThread *thread, jobject jobj, oop obj,
1421 klassOop klass, jfieldID fieldID, bool is_static) {
1422 if (*((int *)get_field_access_count_addr()) > 0 && thread->has_last_Java_frame()) {
1423 // At least one field access watch is set so we have more work
1424 // to do. This wrapper is used by entry points that allow us
1425 // to create handles in post_field_access_by_jni().
1426 post_field_access_by_jni(thread, obj, klass, fieldID, is_static);
1427 // event posting can block so refetch oop if we were passed a jobj
1428 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj);
1429 }
1430 return obj;
1431 }
1433 oop JvmtiExport::jni_GetField_probe_nh(JavaThread *thread, jobject jobj, oop obj,
1434 klassOop klass, jfieldID fieldID, bool is_static) {
1435 if (*((int *)get_field_access_count_addr()) > 0 && thread->has_last_Java_frame()) {
1436 // At least one field access watch is set so we have more work
1437 // to do. This wrapper is used by "quick" entry points that don't
1438 // allow us to create handles in post_field_access_by_jni(). We
1439 // override that with a ResetNoHandleMark.
1440 ResetNoHandleMark rnhm;
1441 post_field_access_by_jni(thread, obj, klass, fieldID, is_static);
1442 // event posting can block so refetch oop if we were passed a jobj
1443 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj);
1444 }
1445 return obj;
1446 }
1448 void JvmtiExport::post_field_access_by_jni(JavaThread *thread, oop obj,
1449 klassOop klass, jfieldID fieldID, bool is_static) {
1450 // We must be called with a Java context in order to provide reasonable
1451 // values for the klazz, method, and location fields. The callers of this
1452 // function don't make the call unless there is a Java context.
1453 assert(thread->has_last_Java_frame(), "must be called with a Java context");
1455 ResourceMark rm;
1456 fieldDescriptor fd;
1457 // if get_field_descriptor finds fieldID to be invalid, then we just bail
1458 bool valid_fieldID = JvmtiEnv::get_field_descriptor(klass, fieldID, &fd);
1459 assert(valid_fieldID == true,"post_field_access_by_jni called with invalid fieldID");
1460 if (!valid_fieldID) return;
1461 // field accesses are not watched so bail
1462 if (!fd.is_field_access_watched()) return;
1464 HandleMark hm(thread);
1465 KlassHandle h_klass(thread, klass);
1466 Handle h_obj;
1467 if (!is_static) {
1468 // non-static field accessors have an object, but we need a handle
1469 assert(obj != NULL, "non-static needs an object");
1470 h_obj = Handle(thread, obj);
1471 }
1472 post_field_access(thread,
1473 thread->last_frame().interpreter_frame_method(),
1474 thread->last_frame().interpreter_frame_bcp(),
1475 h_klass, h_obj, fieldID);
1476 }
1478 void JvmtiExport::post_field_access(JavaThread *thread, methodOop method,
1479 address location, KlassHandle field_klass, Handle object, jfieldID field) {
1481 HandleMark hm(thread);
1482 methodHandle mh(thread, method);
1484 JvmtiThreadState *state = thread->jvmti_thread_state();
1485 if (state == NULL) {
1486 return;
1487 }
1488 EVT_TRIG_TRACE(JVMTI_EVENT_FIELD_ACCESS, ("JVMTI [%s] Trg Field Access event triggered",
1489 JvmtiTrace::safe_get_thread_name(thread)));
1490 JvmtiEnvThreadStateIterator it(state);
1491 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1492 if (ets->is_enabled(JVMTI_EVENT_FIELD_ACCESS)) {
1493 EVT_TRACE(JVMTI_EVENT_FIELD_ACCESS, ("JVMTI [%s] Evt Field Access event sent %s.%s @ %d",
1494 JvmtiTrace::safe_get_thread_name(thread),
1495 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1496 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1497 location - mh()->code_base() ));
1499 JvmtiEnv *env = ets->get_env();
1500 JvmtiLocationEventMark jem(thread, mh, location);
1501 jclass field_jclass = jem.to_jclass(field_klass());
1502 jobject field_jobject = jem.to_jobject(object());
1503 JvmtiJavaThreadEventTransition jet(thread);
1504 jvmtiEventFieldAccess callback = env->callbacks()->FieldAccess;
1505 if (callback != NULL) {
1506 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1507 jem.jni_methodID(), jem.location(),
1508 field_jclass, field_jobject, field);
1509 }
1510 }
1511 }
1512 }
1514 oop JvmtiExport::jni_SetField_probe(JavaThread *thread, jobject jobj, oop obj,
1515 klassOop klass, jfieldID fieldID, bool is_static,
1516 char sig_type, jvalue *value) {
1517 if (*((int *)get_field_modification_count_addr()) > 0 && thread->has_last_Java_frame()) {
1518 // At least one field modification watch is set so we have more work
1519 // to do. This wrapper is used by entry points that allow us
1520 // to create handles in post_field_modification_by_jni().
1521 post_field_modification_by_jni(thread, obj, klass, fieldID, is_static, sig_type, value);
1522 // event posting can block so refetch oop if we were passed a jobj
1523 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj);
1524 }
1525 return obj;
1526 }
1528 oop JvmtiExport::jni_SetField_probe_nh(JavaThread *thread, jobject jobj, oop obj,
1529 klassOop klass, jfieldID fieldID, bool is_static,
1530 char sig_type, jvalue *value) {
1531 if (*((int *)get_field_modification_count_addr()) > 0 && thread->has_last_Java_frame()) {
1532 // At least one field modification watch is set so we have more work
1533 // to do. This wrapper is used by "quick" entry points that don't
1534 // allow us to create handles in post_field_modification_by_jni(). We
1535 // override that with a ResetNoHandleMark.
1536 ResetNoHandleMark rnhm;
1537 post_field_modification_by_jni(thread, obj, klass, fieldID, is_static, sig_type, value);
1538 // event posting can block so refetch oop if we were passed a jobj
1539 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj);
1540 }
1541 return obj;
1542 }
1544 void JvmtiExport::post_field_modification_by_jni(JavaThread *thread, oop obj,
1545 klassOop klass, jfieldID fieldID, bool is_static,
1546 char sig_type, jvalue *value) {
1547 // We must be called with a Java context in order to provide reasonable
1548 // values for the klazz, method, and location fields. The callers of this
1549 // function don't make the call unless there is a Java context.
1550 assert(thread->has_last_Java_frame(), "must be called with Java context");
1552 ResourceMark rm;
1553 fieldDescriptor fd;
1554 // if get_field_descriptor finds fieldID to be invalid, then we just bail
1555 bool valid_fieldID = JvmtiEnv::get_field_descriptor(klass, fieldID, &fd);
1556 assert(valid_fieldID == true,"post_field_modification_by_jni called with invalid fieldID");
1557 if (!valid_fieldID) return;
1558 // field modifications are not watched so bail
1559 if (!fd.is_field_modification_watched()) return;
1561 HandleMark hm(thread);
1563 Handle h_obj;
1564 if (!is_static) {
1565 // non-static field accessors have an object, but we need a handle
1566 assert(obj != NULL, "non-static needs an object");
1567 h_obj = Handle(thread, obj);
1568 }
1569 KlassHandle h_klass(thread, klass);
1570 post_field_modification(thread,
1571 thread->last_frame().interpreter_frame_method(),
1572 thread->last_frame().interpreter_frame_bcp(),
1573 h_klass, h_obj, fieldID, sig_type, value);
1574 }
1576 void JvmtiExport::post_raw_field_modification(JavaThread *thread, methodOop method,
1577 address location, KlassHandle field_klass, Handle object, jfieldID field,
1578 char sig_type, jvalue *value) {
1580 if (sig_type == 'I' || sig_type == 'Z' || sig_type == 'C' || sig_type == 'S') {
1581 // 'I' instructions are used for byte, char, short and int.
1582 // determine which it really is, and convert
1583 fieldDescriptor fd;
1584 bool found = JvmtiEnv::get_field_descriptor(field_klass(), field, &fd);
1585 // should be found (if not, leave as is)
1586 if (found) {
1587 jint ival = value->i;
1588 // convert value from int to appropriate type
1589 switch (fd.field_type()) {
1590 case T_BOOLEAN:
1591 sig_type = 'Z';
1592 value->i = 0; // clear it
1593 value->z = (jboolean)ival;
1594 break;
1595 case T_BYTE:
1596 sig_type = 'B';
1597 value->i = 0; // clear it
1598 value->b = (jbyte)ival;
1599 break;
1600 case T_CHAR:
1601 sig_type = 'C';
1602 value->i = 0; // clear it
1603 value->c = (jchar)ival;
1604 break;
1605 case T_SHORT:
1606 sig_type = 'S';
1607 value->i = 0; // clear it
1608 value->s = (jshort)ival;
1609 break;
1610 case T_INT:
1611 // nothing to do
1612 break;
1613 default:
1614 // this is an integer instruction, should be one of above
1615 ShouldNotReachHere();
1616 break;
1617 }
1618 }
1619 }
1621 // convert oop to JNI handle.
1622 if (sig_type == 'L' || sig_type == '[') {
1623 value->l = (jobject)JNIHandles::make_local(thread, (oop)value->l);
1624 }
1626 post_field_modification(thread, method, location, field_klass, object, field, sig_type, value);
1628 // Destroy the JNI handle allocated above.
1629 if (sig_type == 'L') {
1630 JNIHandles::destroy_local(value->l);
1631 }
1632 }
1634 void JvmtiExport::post_field_modification(JavaThread *thread, methodOop method,
1635 address location, KlassHandle field_klass, Handle object, jfieldID field,
1636 char sig_type, jvalue *value_ptr) {
1638 HandleMark hm(thread);
1639 methodHandle mh(thread, method);
1641 JvmtiThreadState *state = thread->jvmti_thread_state();
1642 if (state == NULL) {
1643 return;
1644 }
1645 EVT_TRIG_TRACE(JVMTI_EVENT_FIELD_MODIFICATION,
1646 ("JVMTI [%s] Trg Field Modification event triggered",
1647 JvmtiTrace::safe_get_thread_name(thread)));
1649 JvmtiEnvThreadStateIterator it(state);
1650 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1651 if (ets->is_enabled(JVMTI_EVENT_FIELD_MODIFICATION)) {
1652 EVT_TRACE(JVMTI_EVENT_FIELD_MODIFICATION,
1653 ("JVMTI [%s] Evt Field Modification event sent %s.%s @ %d",
1654 JvmtiTrace::safe_get_thread_name(thread),
1655 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1656 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1657 location - mh()->code_base() ));
1659 JvmtiEnv *env = ets->get_env();
1660 JvmtiLocationEventMark jem(thread, mh, location);
1661 jclass field_jclass = jem.to_jclass(field_klass());
1662 jobject field_jobject = jem.to_jobject(object());
1663 JvmtiJavaThreadEventTransition jet(thread);
1664 jvmtiEventFieldModification callback = env->callbacks()->FieldModification;
1665 if (callback != NULL) {
1666 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1667 jem.jni_methodID(), jem.location(),
1668 field_jclass, field_jobject, field, sig_type, *value_ptr);
1669 }
1670 }
1671 }
1672 }
1674 void JvmtiExport::post_native_method_bind(methodOop method, address* function_ptr) {
1675 JavaThread* thread = JavaThread::current();
1676 assert(thread->thread_state() == _thread_in_vm, "must be in vm state");
1678 HandleMark hm(thread);
1679 methodHandle mh(thread, method);
1681 EVT_TRIG_TRACE(JVMTI_EVENT_NATIVE_METHOD_BIND, ("JVMTI [%s] Trg Native Method Bind event triggered",
1682 JvmtiTrace::safe_get_thread_name(thread)));
1684 if (JvmtiEventController::is_enabled(JVMTI_EVENT_NATIVE_METHOD_BIND)) {
1685 JvmtiEnvIterator it;
1686 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1687 if (env->is_enabled(JVMTI_EVENT_NATIVE_METHOD_BIND)) {
1688 EVT_TRACE(JVMTI_EVENT_NATIVE_METHOD_BIND, ("JVMTI [%s] Evt Native Method Bind event sent",
1689 JvmtiTrace::safe_get_thread_name(thread) ));
1691 JvmtiMethodEventMark jem(thread, mh);
1692 JvmtiJavaThreadEventTransition jet(thread);
1693 JNIEnv* jni_env = JvmtiEnv::get_phase() == JVMTI_PHASE_PRIMORDIAL? NULL : jem.jni_env();
1694 jvmtiEventNativeMethodBind callback = env->callbacks()->NativeMethodBind;
1695 if (callback != NULL) {
1696 (*callback)(env->jvmti_external(), jni_env, jem.jni_thread(),
1697 jem.jni_methodID(), (void*)(*function_ptr), (void**)function_ptr);
1698 }
1699 }
1700 }
1701 }
1702 }
1704 // Returns a record containing inlining information for the given nmethod
1705 jvmtiCompiledMethodLoadInlineRecord* create_inline_record(nmethod* nm) {
1706 jint numstackframes = 0;
1707 jvmtiCompiledMethodLoadInlineRecord* record = (jvmtiCompiledMethodLoadInlineRecord*)NEW_RESOURCE_OBJ(jvmtiCompiledMethodLoadInlineRecord);
1708 record->header.kind = JVMTI_CMLR_INLINE_INFO;
1709 record->header.next = NULL;
1710 record->header.majorinfoversion = JVMTI_CMLR_MAJOR_VERSION_1;
1711 record->header.minorinfoversion = JVMTI_CMLR_MINOR_VERSION_0;
1712 record->numpcs = 0;
1713 for(PcDesc* p = nm->scopes_pcs_begin(); p < nm->scopes_pcs_end(); p++) {
1714 if(p->scope_decode_offset() == DebugInformationRecorder::serialized_null) continue;
1715 record->numpcs++;
1716 }
1717 record->pcinfo = (PCStackInfo*)(NEW_RESOURCE_ARRAY(PCStackInfo, record->numpcs));
1718 int scope = 0;
1719 for(PcDesc* p = nm->scopes_pcs_begin(); p < nm->scopes_pcs_end(); p++) {
1720 if(p->scope_decode_offset() == DebugInformationRecorder::serialized_null) continue;
1721 void* pc_address = (void*)p->real_pc(nm);
1722 assert(pc_address != NULL, "pc_address must be non-null");
1723 record->pcinfo[scope].pc = pc_address;
1724 numstackframes=0;
1725 for(ScopeDesc* sd = nm->scope_desc_at(p->real_pc(nm));sd != NULL;sd = sd->sender()) {
1726 numstackframes++;
1727 }
1728 assert(numstackframes != 0, "numstackframes must be nonzero.");
1729 record->pcinfo[scope].methods = (jmethodID *)NEW_RESOURCE_ARRAY(jmethodID, numstackframes);
1730 record->pcinfo[scope].bcis = (jint *)NEW_RESOURCE_ARRAY(jint, numstackframes);
1731 record->pcinfo[scope].numstackframes = numstackframes;
1732 int stackframe = 0;
1733 for(ScopeDesc* sd = nm->scope_desc_at(p->real_pc(nm));sd != NULL;sd = sd->sender()) {
1734 // 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()
1735 assert(!sd->method().is_null(), "sd->method() cannot be null.");
1736 record->pcinfo[scope].methods[stackframe] = sd->method()->jmethod_id();
1737 record->pcinfo[scope].bcis[stackframe] = sd->bci();
1738 stackframe++;
1739 }
1740 scope++;
1741 }
1742 return record;
1743 }
1745 void JvmtiExport::post_compiled_method_load(nmethod *nm) {
1746 JavaThread* thread = JavaThread::current();
1748 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
1749 ("JVMTI [%s] method compile load event triggered",
1750 JvmtiTrace::safe_get_thread_name(thread)));
1752 JvmtiEnvIterator it;
1753 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1754 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_LOAD)) {
1756 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
1757 ("JVMTI [%s] class compile method load event sent %s.%s ",
1758 JvmtiTrace::safe_get_thread_name(thread),
1759 (nm->method() == NULL) ? "NULL" : nm->method()->klass_name()->as_C_string(),
1760 (nm->method() == NULL) ? "NULL" : nm->method()->name()->as_C_string()));
1761 ResourceMark rm(thread);
1762 HandleMark hm(thread);
1764 // Add inlining information
1765 jvmtiCompiledMethodLoadInlineRecord* inlinerecord = create_inline_record(nm);
1766 // Pass inlining information through the void pointer
1767 JvmtiCompiledMethodLoadEventMark jem(thread, nm, inlinerecord);
1768 JvmtiJavaThreadEventTransition jet(thread);
1769 jvmtiEventCompiledMethodLoad callback = env->callbacks()->CompiledMethodLoad;
1770 if (callback != NULL) {
1771 (*callback)(env->jvmti_external(), jem.jni_methodID(),
1772 jem.code_size(), jem.code_data(), jem.map_length(),
1773 jem.map(), jem.compile_info());
1774 }
1775 }
1776 }
1777 }
1780 // post a COMPILED_METHOD_LOAD event for a given environment
1781 void JvmtiExport::post_compiled_method_load(JvmtiEnv* env, const jmethodID method, const jint length,
1782 const void *code_begin, const jint map_length,
1783 const jvmtiAddrLocationMap* map)
1784 {
1785 JavaThread* thread = JavaThread::current();
1786 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
1787 ("JVMTI [%s] method compile load event triggered (by GenerateEvents)",
1788 JvmtiTrace::safe_get_thread_name(thread)));
1789 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_LOAD)) {
1791 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
1792 ("JVMTI [%s] class compile method load event sent (by GenerateEvents), jmethodID=" PTR_FORMAT,
1793 JvmtiTrace::safe_get_thread_name(thread), method));
1795 JvmtiEventMark jem(thread);
1796 JvmtiJavaThreadEventTransition jet(thread);
1797 jvmtiEventCompiledMethodLoad callback = env->callbacks()->CompiledMethodLoad;
1798 if (callback != NULL) {
1799 (*callback)(env->jvmti_external(), method,
1800 length, code_begin, map_length,
1801 map, NULL);
1802 }
1803 }
1804 }
1806 void JvmtiExport::post_dynamic_code_generated_internal(const char *name, const void *code_begin, const void *code_end) {
1807 assert(name != NULL && name[0] != '\0', "sanity check");
1809 JavaThread* thread = JavaThread::current();
1810 // In theory everyone coming thru here is in_vm but we need to be certain
1811 // because a callee will do a vm->native transition
1812 ThreadInVMfromUnknown __tiv;
1814 EVT_TRIG_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED,
1815 ("JVMTI [%s] method dynamic code generated event triggered",
1816 JvmtiTrace::safe_get_thread_name(thread)));
1817 JvmtiEnvIterator it;
1818 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1819 if (env->is_enabled(JVMTI_EVENT_DYNAMIC_CODE_GENERATED)) {
1820 EVT_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED,
1821 ("JVMTI [%s] dynamic code generated event sent for %s",
1822 JvmtiTrace::safe_get_thread_name(thread), name));
1823 JvmtiEventMark jem(thread);
1824 JvmtiJavaThreadEventTransition jet(thread);
1825 jint length = (jint)pointer_delta(code_end, code_begin, sizeof(char));
1826 jvmtiEventDynamicCodeGenerated callback = env->callbacks()->DynamicCodeGenerated;
1827 if (callback != NULL) {
1828 (*callback)(env->jvmti_external(), name, (void*)code_begin, length);
1829 }
1830 }
1831 }
1832 }
1834 void JvmtiExport::post_dynamic_code_generated(const char *name, const void *code_begin, const void *code_end) {
1835 jvmtiPhase phase = JvmtiEnv::get_phase();
1836 if (phase == JVMTI_PHASE_PRIMORDIAL || phase == JVMTI_PHASE_START) {
1837 post_dynamic_code_generated_internal(name, code_begin, code_end);
1838 } else {
1839 // It may not be safe to post the event from this thread. Defer all
1840 // postings to the service thread so that it can perform them in a safe
1841 // context and in-order.
1842 MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag);
1843 JvmtiDeferredEvent event = JvmtiDeferredEvent::dynamic_code_generated_event(
1844 name, code_begin, code_end);
1845 JvmtiDeferredEventQueue::enqueue(event);
1846 }
1847 }
1850 // post a DYNAMIC_CODE_GENERATED event for a given environment
1851 // used by GenerateEvents
1852 void JvmtiExport::post_dynamic_code_generated(JvmtiEnv* env, const char *name,
1853 const void *code_begin, const void *code_end)
1854 {
1855 JavaThread* thread = JavaThread::current();
1856 EVT_TRIG_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED,
1857 ("JVMTI [%s] dynamic code generated event triggered (by GenerateEvents)",
1858 JvmtiTrace::safe_get_thread_name(thread)));
1859 if (env->is_enabled(JVMTI_EVENT_DYNAMIC_CODE_GENERATED)) {
1860 EVT_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED,
1861 ("JVMTI [%s] dynamic code generated event sent for %s",
1862 JvmtiTrace::safe_get_thread_name(thread), name));
1863 JvmtiEventMark jem(thread);
1864 JvmtiJavaThreadEventTransition jet(thread);
1865 jint length = (jint)pointer_delta(code_end, code_begin, sizeof(char));
1866 jvmtiEventDynamicCodeGenerated callback = env->callbacks()->DynamicCodeGenerated;
1867 if (callback != NULL) {
1868 (*callback)(env->jvmti_external(), name, (void*)code_begin, length);
1869 }
1870 }
1871 }
1873 // post a DynamicCodeGenerated event while holding locks in the VM.
1874 void JvmtiExport::post_dynamic_code_generated_while_holding_locks(const char* name,
1875 address code_begin, address code_end)
1876 {
1877 // register the stub with the current dynamic code event collector
1878 JvmtiThreadState* state = JvmtiThreadState::state_for(JavaThread::current());
1879 // state can only be NULL if the current thread is exiting which
1880 // should not happen since we're trying to post an event
1881 guarantee(state != NULL, "attempt to register stub via an exiting thread");
1882 JvmtiDynamicCodeEventCollector* collector = state->get_dynamic_code_event_collector();
1883 guarantee(collector != NULL, "attempt to register stub without event collector");
1884 collector->register_stub(name, code_begin, code_end);
1885 }
1887 // Collect all the vm internally allocated objects which are visible to java world
1888 void JvmtiExport::record_vm_internal_object_allocation(oop obj) {
1889 Thread* thread = ThreadLocalStorage::thread();
1890 if (thread != NULL && thread->is_Java_thread()) {
1891 // Can not take safepoint here.
1892 No_Safepoint_Verifier no_sfpt;
1893 // Can not take safepoint here so can not use state_for to get
1894 // jvmti thread state.
1895 JvmtiThreadState *state = ((JavaThread*)thread)->jvmti_thread_state();
1896 if (state != NULL ) {
1897 // state is non NULL when VMObjectAllocEventCollector is enabled.
1898 JvmtiVMObjectAllocEventCollector *collector;
1899 collector = state->get_vm_object_alloc_event_collector();
1900 if (collector != NULL && collector->is_enabled()) {
1901 // Don't record classes as these will be notified via the ClassLoad
1902 // event.
1903 if (obj->klass() != SystemDictionary::Class_klass()) {
1904 collector->record_allocation(obj);
1905 }
1906 }
1907 }
1908 }
1909 }
1911 void JvmtiExport::post_garbage_collection_finish() {
1912 Thread *thread = Thread::current(); // this event is posted from VM-Thread.
1913 EVT_TRIG_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH,
1914 ("JVMTI [%s] garbage collection finish event triggered",
1915 JvmtiTrace::safe_get_thread_name(thread)));
1916 JvmtiEnvIterator it;
1917 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1918 if (env->is_enabled(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH)) {
1919 EVT_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH,
1920 ("JVMTI [%s] garbage collection finish event sent ",
1921 JvmtiTrace::safe_get_thread_name(thread)));
1922 JvmtiThreadEventTransition jet(thread);
1923 // JNIEnv is NULL here because this event is posted from VM Thread
1924 jvmtiEventGarbageCollectionFinish callback = env->callbacks()->GarbageCollectionFinish;
1925 if (callback != NULL) {
1926 (*callback)(env->jvmti_external());
1927 }
1928 }
1929 }
1930 }
1932 void JvmtiExport::post_garbage_collection_start() {
1933 Thread* thread = Thread::current(); // this event is posted from vm-thread.
1934 EVT_TRIG_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_START,
1935 ("JVMTI [%s] garbage collection start event triggered",
1936 JvmtiTrace::safe_get_thread_name(thread)));
1937 JvmtiEnvIterator it;
1938 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1939 if (env->is_enabled(JVMTI_EVENT_GARBAGE_COLLECTION_START)) {
1940 EVT_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_START,
1941 ("JVMTI [%s] garbage collection start event sent ",
1942 JvmtiTrace::safe_get_thread_name(thread)));
1943 JvmtiThreadEventTransition jet(thread);
1944 // JNIEnv is NULL here because this event is posted from VM Thread
1945 jvmtiEventGarbageCollectionStart callback = env->callbacks()->GarbageCollectionStart;
1946 if (callback != NULL) {
1947 (*callback)(env->jvmti_external());
1948 }
1949 }
1950 }
1951 }
1953 void JvmtiExport::post_data_dump() {
1954 Thread *thread = Thread::current();
1955 EVT_TRIG_TRACE(JVMTI_EVENT_DATA_DUMP_REQUEST,
1956 ("JVMTI [%s] data dump request event triggered",
1957 JvmtiTrace::safe_get_thread_name(thread)));
1958 JvmtiEnvIterator it;
1959 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1960 if (env->is_enabled(JVMTI_EVENT_DATA_DUMP_REQUEST)) {
1961 EVT_TRACE(JVMTI_EVENT_DATA_DUMP_REQUEST,
1962 ("JVMTI [%s] data dump request event sent ",
1963 JvmtiTrace::safe_get_thread_name(thread)));
1964 JvmtiThreadEventTransition jet(thread);
1965 // JNIEnv is NULL here because this event is posted from VM Thread
1966 jvmtiEventDataDumpRequest callback = env->callbacks()->DataDumpRequest;
1967 if (callback != NULL) {
1968 (*callback)(env->jvmti_external());
1969 }
1970 }
1971 }
1972 }
1974 void JvmtiExport::post_monitor_contended_enter(JavaThread *thread, ObjectMonitor *obj_mntr) {
1975 oop object = (oop)obj_mntr->object();
1976 if (!ServiceUtil::visible_oop(object)) {
1977 // Ignore monitor contended enter for vm internal object.
1978 return;
1979 }
1980 JvmtiThreadState *state = thread->jvmti_thread_state();
1981 if (state == NULL) {
1982 return;
1983 }
1985 HandleMark hm(thread);
1986 Handle h(thread, object);
1988 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTER,
1989 ("JVMTI [%s] montior contended enter event triggered",
1990 JvmtiTrace::safe_get_thread_name(thread)));
1992 JvmtiEnvThreadStateIterator it(state);
1993 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1994 if (ets->is_enabled(JVMTI_EVENT_MONITOR_CONTENDED_ENTER)) {
1995 EVT_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTER,
1996 ("JVMTI [%s] monitor contended enter event sent",
1997 JvmtiTrace::safe_get_thread_name(thread)));
1998 JvmtiMonitorEventMark jem(thread, h());
1999 JvmtiEnv *env = ets->get_env();
2000 JvmtiThreadEventTransition jet(thread);
2001 jvmtiEventMonitorContendedEnter callback = env->callbacks()->MonitorContendedEnter;
2002 if (callback != NULL) {
2003 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_object());
2004 }
2005 }
2006 }
2007 }
2009 void JvmtiExport::post_monitor_contended_entered(JavaThread *thread, ObjectMonitor *obj_mntr) {
2010 oop object = (oop)obj_mntr->object();
2011 if (!ServiceUtil::visible_oop(object)) {
2012 // Ignore monitor contended entered for vm internal object.
2013 return;
2014 }
2015 JvmtiThreadState *state = thread->jvmti_thread_state();
2016 if (state == NULL) {
2017 return;
2018 }
2020 HandleMark hm(thread);
2021 Handle h(thread, object);
2023 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED,
2024 ("JVMTI [%s] montior contended entered event triggered",
2025 JvmtiTrace::safe_get_thread_name(thread)));
2027 JvmtiEnvThreadStateIterator it(state);
2028 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
2029 if (ets->is_enabled(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED)) {
2030 EVT_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED,
2031 ("JVMTI [%s] monitor contended enter event sent",
2032 JvmtiTrace::safe_get_thread_name(thread)));
2033 JvmtiMonitorEventMark jem(thread, h());
2034 JvmtiEnv *env = ets->get_env();
2035 JvmtiThreadEventTransition jet(thread);
2036 jvmtiEventMonitorContendedEntered callback = env->callbacks()->MonitorContendedEntered;
2037 if (callback != NULL) {
2038 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_object());
2039 }
2040 }
2041 }
2042 }
2044 void JvmtiExport::post_monitor_wait(JavaThread *thread, oop object,
2045 jlong timeout) {
2046 JvmtiThreadState *state = thread->jvmti_thread_state();
2047 if (state == NULL) {
2048 return;
2049 }
2051 HandleMark hm(thread);
2052 Handle h(thread, object);
2054 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_WAIT,
2055 ("JVMTI [%s] montior wait event triggered",
2056 JvmtiTrace::safe_get_thread_name(thread)));
2058 JvmtiEnvThreadStateIterator it(state);
2059 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
2060 if (ets->is_enabled(JVMTI_EVENT_MONITOR_WAIT)) {
2061 EVT_TRACE(JVMTI_EVENT_MONITOR_WAIT,
2062 ("JVMTI [%s] monitor wait event sent ",
2063 JvmtiTrace::safe_get_thread_name(thread)));
2064 JvmtiMonitorEventMark jem(thread, h());
2065 JvmtiEnv *env = ets->get_env();
2066 JvmtiThreadEventTransition jet(thread);
2067 jvmtiEventMonitorWait callback = env->callbacks()->MonitorWait;
2068 if (callback != NULL) {
2069 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
2070 jem.jni_object(), timeout);
2071 }
2072 }
2073 }
2074 }
2076 void JvmtiExport::post_monitor_waited(JavaThread *thread, ObjectMonitor *obj_mntr, jboolean timed_out) {
2077 oop object = (oop)obj_mntr->object();
2078 if (!ServiceUtil::visible_oop(object)) {
2079 // Ignore monitor waited for vm internal object.
2080 return;
2081 }
2082 JvmtiThreadState *state = thread->jvmti_thread_state();
2083 if (state == NULL) {
2084 return;
2085 }
2087 HandleMark hm(thread);
2088 Handle h(thread, object);
2090 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_WAITED,
2091 ("JVMTI [%s] montior waited event triggered",
2092 JvmtiTrace::safe_get_thread_name(thread)));
2094 JvmtiEnvThreadStateIterator it(state);
2095 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
2096 if (ets->is_enabled(JVMTI_EVENT_MONITOR_WAITED)) {
2097 EVT_TRACE(JVMTI_EVENT_MONITOR_WAITED,
2098 ("JVMTI [%s] monitor waited event sent ",
2099 JvmtiTrace::safe_get_thread_name(thread)));
2100 JvmtiMonitorEventMark jem(thread, h());
2101 JvmtiEnv *env = ets->get_env();
2102 JvmtiThreadEventTransition jet(thread);
2103 jvmtiEventMonitorWaited callback = env->callbacks()->MonitorWaited;
2104 if (callback != NULL) {
2105 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
2106 jem.jni_object(), timed_out);
2107 }
2108 }
2109 }
2110 }
2113 void JvmtiExport::post_vm_object_alloc(JavaThread *thread, oop object) {
2114 EVT_TRIG_TRACE(JVMTI_EVENT_VM_OBJECT_ALLOC, ("JVMTI [%s] Trg vm object alloc triggered",
2115 JvmtiTrace::safe_get_thread_name(thread)));
2116 if (object == NULL) {
2117 return;
2118 }
2119 HandleMark hm(thread);
2120 Handle h(thread, object);
2121 JvmtiEnvIterator it;
2122 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
2123 if (env->is_enabled(JVMTI_EVENT_VM_OBJECT_ALLOC)) {
2124 EVT_TRACE(JVMTI_EVENT_VM_OBJECT_ALLOC, ("JVMTI [%s] Evt vmobject alloc sent %s",
2125 JvmtiTrace::safe_get_thread_name(thread),
2126 object==NULL? "NULL" : Klass::cast(java_lang_Class::as_klassOop(object))->external_name()));
2128 JvmtiVMObjectAllocEventMark jem(thread, h());
2129 JvmtiJavaThreadEventTransition jet(thread);
2130 jvmtiEventVMObjectAlloc callback = env->callbacks()->VMObjectAlloc;
2131 if (callback != NULL) {
2132 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
2133 jem.jni_jobject(), jem.jni_class(), jem.size());
2134 }
2135 }
2136 }
2137 }
2139 ////////////////////////////////////////////////////////////////////////////////////////////////
2141 void JvmtiExport::cleanup_thread(JavaThread* thread) {
2142 assert(JavaThread::current() == thread, "thread is not current");
2143 MutexLocker mu(JvmtiThreadState_lock);
2145 if (thread->jvmti_thread_state() != NULL) {
2146 // This has to happen after the thread state is removed, which is
2147 // why it is not in post_thread_end_event like its complement
2148 // Maybe both these functions should be rolled into the posts?
2149 JvmtiEventController::thread_ended(thread);
2150 }
2151 }
2153 void JvmtiExport::oops_do(OopClosure* f) {
2154 JvmtiCurrentBreakpoints::oops_do(f);
2155 JvmtiVMObjectAllocEventCollector::oops_do_for_all_threads(f);
2156 }
2158 void JvmtiExport::weak_oops_do(BoolObjectClosure* is_alive, OopClosure* f) {
2159 JvmtiTagMap::weak_oops_do(is_alive, f);
2160 }
2162 void JvmtiExport::gc_epilogue() {
2163 JvmtiCurrentBreakpoints::gc_epilogue();
2164 }
2166 // Onload raw monitor transition.
2167 void JvmtiExport::transition_pending_onload_raw_monitors() {
2168 JvmtiPendingMonitors::transition_raw_monitors();
2169 }
2171 ////////////////////////////////////////////////////////////////////////////////////////////////
2173 // type for the Agent_OnAttach entry point
2174 extern "C" {
2175 typedef jint (JNICALL *OnAttachEntry_t)(JavaVM*, char *, void *);
2176 }
2178 #ifndef SERVICES_KERNEL
2179 jint JvmtiExport::load_agent_library(AttachOperation* op, outputStream* st) {
2180 char ebuf[1024];
2181 char buffer[JVM_MAXPATHLEN];
2182 void* library;
2183 jint result = JNI_ERR;
2185 // get agent name and options
2186 const char* agent = op->arg(0);
2187 const char* absParam = op->arg(1);
2188 const char* options = op->arg(2);
2190 // The abs paramter should be "true" or "false"
2191 bool is_absolute_path = (absParam != NULL) && (strcmp(absParam,"true")==0);
2194 // If the path is absolute we attempt to load the library. Otherwise we try to
2195 // load it from the standard dll directory.
2197 if (is_absolute_path) {
2198 library = os::dll_load(agent, ebuf, sizeof ebuf);
2199 } else {
2200 // Try to load the agent from the standard dll directory
2201 os::dll_build_name(buffer, sizeof(buffer), Arguments::get_dll_dir(), agent);
2202 library = os::dll_load(buffer, ebuf, sizeof ebuf);
2203 if (library == NULL) {
2204 // not found - try local path
2205 char ns[1] = {0};
2206 os::dll_build_name(buffer, sizeof(buffer), ns, agent);
2207 library = os::dll_load(buffer, ebuf, sizeof ebuf);
2208 }
2209 }
2211 // If the library was loaded then we attempt to invoke the Agent_OnAttach
2212 // function
2213 if (library != NULL) {
2215 // Lookup the Agent_OnAttach function
2216 OnAttachEntry_t on_attach_entry = NULL;
2217 const char *on_attach_symbols[] = AGENT_ONATTACH_SYMBOLS;
2218 for (uint symbol_index = 0; symbol_index < ARRAY_SIZE(on_attach_symbols); symbol_index++) {
2219 on_attach_entry =
2220 CAST_TO_FN_PTR(OnAttachEntry_t, os::dll_lookup(library, on_attach_symbols[symbol_index]));
2221 if (on_attach_entry != NULL) break;
2222 }
2224 if (on_attach_entry == NULL) {
2225 // Agent_OnAttach missing - unload library
2226 os::dll_unload(library);
2227 } else {
2228 // Invoke the Agent_OnAttach function
2229 JavaThread* THREAD = JavaThread::current();
2230 {
2231 extern struct JavaVM_ main_vm;
2232 JvmtiThreadEventMark jem(THREAD);
2233 JvmtiJavaThreadEventTransition jet(THREAD);
2235 result = (*on_attach_entry)(&main_vm, (char*)options, NULL);
2236 }
2238 // Agent_OnAttach may have used JNI
2239 if (HAS_PENDING_EXCEPTION) {
2240 CLEAR_PENDING_EXCEPTION;
2241 }
2243 // If OnAttach returns JNI_OK then we add it to the list of
2244 // agent libraries so that we can call Agent_OnUnload later.
2245 if (result == JNI_OK) {
2246 Arguments::add_loaded_agent(agent, (char*)options, is_absolute_path, library);
2247 }
2249 // Agent_OnAttach executed so completion status is JNI_OK
2250 st->print_cr("%d", result);
2251 result = JNI_OK;
2252 }
2253 }
2254 return result;
2255 }
2256 #endif // SERVICES_KERNEL
2258 ////////////////////////////////////////////////////////////////////////////////////////////////
2260 // Setup current current thread for event collection.
2261 void JvmtiEventCollector::setup_jvmti_thread_state() {
2262 // set this event collector to be the current one.
2263 JvmtiThreadState* state = JvmtiThreadState::state_for(JavaThread::current());
2264 // state can only be NULL if the current thread is exiting which
2265 // should not happen since we're trying to configure for event collection
2266 guarantee(state != NULL, "exiting thread called setup_jvmti_thread_state");
2267 if (is_vm_object_alloc_event()) {
2268 _prev = state->get_vm_object_alloc_event_collector();
2269 state->set_vm_object_alloc_event_collector((JvmtiVMObjectAllocEventCollector *)this);
2270 } else if (is_dynamic_code_event()) {
2271 _prev = state->get_dynamic_code_event_collector();
2272 state->set_dynamic_code_event_collector((JvmtiDynamicCodeEventCollector *)this);
2273 }
2274 }
2276 // Unset current event collection in this thread and reset it with previous
2277 // collector.
2278 void JvmtiEventCollector::unset_jvmti_thread_state() {
2279 JvmtiThreadState* state = JavaThread::current()->jvmti_thread_state();
2280 if (state != NULL) {
2281 // restore the previous event collector (if any)
2282 if (is_vm_object_alloc_event()) {
2283 if (state->get_vm_object_alloc_event_collector() == this) {
2284 state->set_vm_object_alloc_event_collector((JvmtiVMObjectAllocEventCollector *)_prev);
2285 } else {
2286 // this thread's jvmti state was created during the scope of
2287 // the event collector.
2288 }
2289 } else {
2290 if (is_dynamic_code_event()) {
2291 if (state->get_dynamic_code_event_collector() == this) {
2292 state->set_dynamic_code_event_collector((JvmtiDynamicCodeEventCollector *)_prev);
2293 } else {
2294 // this thread's jvmti state was created during the scope of
2295 // the event collector.
2296 }
2297 }
2298 }
2299 }
2300 }
2302 // create the dynamic code event collector
2303 JvmtiDynamicCodeEventCollector::JvmtiDynamicCodeEventCollector() : _code_blobs(NULL) {
2304 if (JvmtiExport::should_post_dynamic_code_generated()) {
2305 setup_jvmti_thread_state();
2306 }
2307 }
2309 // iterate over any code blob descriptors collected and post a
2310 // DYNAMIC_CODE_GENERATED event to the profiler.
2311 JvmtiDynamicCodeEventCollector::~JvmtiDynamicCodeEventCollector() {
2312 assert(!JavaThread::current()->owns_locks(), "all locks must be released to post deferred events");
2313 // iterate over any code blob descriptors that we collected
2314 if (_code_blobs != NULL) {
2315 for (int i=0; i<_code_blobs->length(); i++) {
2316 JvmtiCodeBlobDesc* blob = _code_blobs->at(i);
2317 JvmtiExport::post_dynamic_code_generated(blob->name(), blob->code_begin(), blob->code_end());
2318 FreeHeap(blob);
2319 }
2320 delete _code_blobs;
2321 }
2322 unset_jvmti_thread_state();
2323 }
2325 // register a stub
2326 void JvmtiDynamicCodeEventCollector::register_stub(const char* name, address start, address end) {
2327 if (_code_blobs == NULL) {
2328 _code_blobs = new (ResourceObj::C_HEAP) GrowableArray<JvmtiCodeBlobDesc*>(1,true);
2329 }
2330 _code_blobs->append(new JvmtiCodeBlobDesc(name, start, end));
2331 }
2333 // Setup current thread to record vm allocated objects.
2334 JvmtiVMObjectAllocEventCollector::JvmtiVMObjectAllocEventCollector() : _allocated(NULL) {
2335 if (JvmtiExport::should_post_vm_object_alloc()) {
2336 _enable = true;
2337 setup_jvmti_thread_state();
2338 } else {
2339 _enable = false;
2340 }
2341 }
2343 // Post vm_object_alloc event for vm allocated objects visible to java
2344 // world.
2345 JvmtiVMObjectAllocEventCollector::~JvmtiVMObjectAllocEventCollector() {
2346 if (_allocated != NULL) {
2347 set_enabled(false);
2348 for (int i = 0; i < _allocated->length(); i++) {
2349 oop obj = _allocated->at(i);
2350 if (ServiceUtil::visible_oop(obj)) {
2351 JvmtiExport::post_vm_object_alloc(JavaThread::current(), obj);
2352 }
2353 }
2354 delete _allocated;
2355 }
2356 unset_jvmti_thread_state();
2357 }
2359 void JvmtiVMObjectAllocEventCollector::record_allocation(oop obj) {
2360 assert(is_enabled(), "VM object alloc event collector is not enabled");
2361 if (_allocated == NULL) {
2362 _allocated = new (ResourceObj::C_HEAP) GrowableArray<oop>(1, true);
2363 }
2364 _allocated->push(obj);
2365 }
2367 // GC support.
2368 void JvmtiVMObjectAllocEventCollector::oops_do(OopClosure* f) {
2369 if (_allocated != NULL) {
2370 for(int i=_allocated->length() - 1; i >= 0; i--) {
2371 if (_allocated->at(i) != NULL) {
2372 f->do_oop(_allocated->adr_at(i));
2373 }
2374 }
2375 }
2376 }
2378 void JvmtiVMObjectAllocEventCollector::oops_do_for_all_threads(OopClosure* f) {
2379 // no-op if jvmti not enabled
2380 if (!JvmtiEnv::environments_might_exist()) {
2381 return;
2382 }
2384 // Runs at safepoint. So no need to acquire Threads_lock.
2385 for (JavaThread *jthr = Threads::first(); jthr != NULL; jthr = jthr->next()) {
2386 JvmtiThreadState *state = jthr->jvmti_thread_state();
2387 if (state != NULL) {
2388 JvmtiVMObjectAllocEventCollector *collector;
2389 collector = state->get_vm_object_alloc_event_collector();
2390 while (collector != NULL) {
2391 collector->oops_do(f);
2392 collector = (JvmtiVMObjectAllocEventCollector *)collector->get_prev();
2393 }
2394 }
2395 }
2396 }
2399 // Disable collection of VMObjectAlloc events
2400 NoJvmtiVMObjectAllocMark::NoJvmtiVMObjectAllocMark() : _collector(NULL) {
2401 // a no-op if VMObjectAlloc event is not enabled
2402 if (!JvmtiExport::should_post_vm_object_alloc()) {
2403 return;
2404 }
2405 Thread* thread = ThreadLocalStorage::thread();
2406 if (thread != NULL && thread->is_Java_thread()) {
2407 JavaThread* current_thread = (JavaThread*)thread;
2408 JvmtiThreadState *state = current_thread->jvmti_thread_state();
2409 if (state != NULL) {
2410 JvmtiVMObjectAllocEventCollector *collector;
2411 collector = state->get_vm_object_alloc_event_collector();
2412 if (collector != NULL && collector->is_enabled()) {
2413 _collector = collector;
2414 _collector->set_enabled(false);
2415 }
2416 }
2417 }
2418 }
2420 // Re-Enable collection of VMObjectAlloc events (if previously enabled)
2421 NoJvmtiVMObjectAllocMark::~NoJvmtiVMObjectAllocMark() {
2422 if (was_enabled()) {
2423 _collector->set_enabled(true);
2424 }
2425 };
2427 JvmtiGCMarker::JvmtiGCMarker() {
2428 // if there aren't any JVMTI environments then nothing to do
2429 if (!JvmtiEnv::environments_might_exist()) {
2430 return;
2431 }
2433 if (JvmtiExport::should_post_garbage_collection_start()) {
2434 JvmtiExport::post_garbage_collection_start();
2435 }
2437 if (SafepointSynchronize::is_at_safepoint()) {
2438 // Do clean up tasks that need to be done at a safepoint
2439 JvmtiEnvBase::check_for_periodic_clean_up();
2440 }
2441 }
2443 JvmtiGCMarker::~JvmtiGCMarker() {
2444 // if there aren't any JVMTI environments then nothing to do
2445 if (!JvmtiEnv::environments_might_exist()) {
2446 return;
2447 }
2449 // JVMTI notify gc finish
2450 if (JvmtiExport::should_post_garbage_collection_finish()) {
2451 JvmtiExport::post_garbage_collection_finish();
2452 }
2453 }
2454 #endif // JVMTI_KERNEL
