1 /*
2 * Copyright (c) 2003, 2016, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/systemDictionary.hpp"
27 #include "code/nmethod.hpp"
28 #include "code/pcDesc.hpp"
29 #include "code/scopeDesc.hpp"
30 #include "interpreter/interpreter.hpp"
31 #include "jvmtifiles/jvmtiEnv.hpp"
32 #include "memory/resourceArea.hpp"
33 #include "oops/objArrayKlass.hpp"
34 #include "oops/objArrayOop.hpp"
35 #include "oops/oop.inline.hpp"
36 #include "prims/jvmtiCodeBlobEvents.hpp"
37 #include "prims/jvmtiEventController.hpp"
38 #include "prims/jvmtiEventController.inline.hpp"
39 #include "prims/jvmtiExport.hpp"
40 #include "prims/jvmtiImpl.hpp"
41 #include "prims/jvmtiManageCapabilities.hpp"
42 #include "prims/jvmtiRawMonitor.hpp"
43 #include "prims/jvmtiRedefineClasses.hpp"
44 #include "prims/jvmtiTagMap.hpp"
45 #include "prims/jvmtiThreadState.inline.hpp"
46 #include "runtime/arguments.hpp"
47 #include "runtime/handles.hpp"
48 #include "runtime/interfaceSupport.hpp"
49 #include "runtime/javaCalls.hpp"
50 #include "runtime/objectMonitor.hpp"
51 #include "runtime/objectMonitor.inline.hpp"
52 #include "runtime/os.inline.hpp"
53 #include "runtime/thread.inline.hpp"
54 #include "runtime/vframe.hpp"
55 #include "services/attachListener.hpp"
56 #include "services/serviceUtil.hpp"
57 #include "utilities/macros.hpp"
58 #if INCLUDE_ALL_GCS
59 #include "gc/parallel/psMarkSweep.hpp"
60 #endif // INCLUDE_ALL_GCS
61
62 #ifdef JVMTI_TRACE
63 #define EVT_TRACE(evt,out) if ((JvmtiTrace::event_trace_flags(evt) & JvmtiTrace::SHOW_EVENT_SENT) != 0) { SafeResourceMark rm; tty->print_cr out; }
64 #define EVT_TRIG_TRACE(evt,out) if ((JvmtiTrace::event_trace_flags(evt) & JvmtiTrace::SHOW_EVENT_TRIGGER) != 0) { SafeResourceMark rm; tty->print_cr out; }
65 #else
66 #define EVT_TRIG_TRACE(evt,out)
67 #define EVT_TRACE(evt,out)
68 #endif
69
70 ///////////////////////////////////////////////////////////////
71 //
72 // JvmtiEventTransition
73 //
74 // TO DO --
75 // more handle purging
76
77 // Use this for JavaThreads and state is _thread_in_vm.
78 class JvmtiJavaThreadEventTransition : StackObj {
79 private:
80 ResourceMark _rm;
81 ThreadToNativeFromVM _transition;
82 HandleMark _hm;
83
84 public:
85 JvmtiJavaThreadEventTransition(JavaThread *thread) :
86 _rm(),
87 _transition(thread),
88 _hm(thread) {};
89 };
90
91 // For JavaThreads which are not in _thread_in_vm state
92 // and other system threads use this.
93 class JvmtiThreadEventTransition : StackObj {
94 private:
95 ResourceMark _rm;
96 HandleMark _hm;
97 JavaThreadState _saved_state;
98 JavaThread *_jthread;
99
100 public:
101 JvmtiThreadEventTransition(Thread *thread) : _rm(), _hm() {
102 if (thread->is_Java_thread()) {
103 _jthread = (JavaThread *)thread;
104 _saved_state = _jthread->thread_state();
105 if (_saved_state == _thread_in_Java) {
106 ThreadStateTransition::transition_from_java(_jthread, _thread_in_native);
107 } else {
108 ThreadStateTransition::transition(_jthread, _saved_state, _thread_in_native);
109 }
110 } else {
111 _jthread = NULL;
112 }
113 }
114
115 ~JvmtiThreadEventTransition() {
116 if (_jthread != NULL)
117 ThreadStateTransition::transition_from_native(_jthread, _saved_state);
118 }
119 };
120
121
122 ///////////////////////////////////////////////////////////////
123 //
124 // JvmtiEventMark
125 //
126
127 class JvmtiEventMark : public StackObj {
128 private:
129 JavaThread *_thread;
130 JNIEnv* _jni_env;
131 bool _exception_detected;
132 bool _exception_caught;
133 #if 0
134 JNIHandleBlock* _hblock;
135 #endif
136
137 public:
138 JvmtiEventMark(JavaThread *thread) : _thread(thread),
139 _jni_env(thread->jni_environment()) {
140 #if 0
141 _hblock = thread->active_handles();
142 _hblock->clear_thoroughly(); // so we can be safe
143 #else
144 // we want to use the code above - but that needs the JNIHandle changes - later...
145 // for now, steal JNI push local frame code
146 JvmtiThreadState *state = thread->jvmti_thread_state();
147 // we are before an event.
148 // Save current jvmti thread exception state.
149 if (state != NULL) {
150 _exception_detected = state->is_exception_detected();
151 _exception_caught = state->is_exception_caught();
152 } else {
153 _exception_detected = false;
154 _exception_caught = false;
155 }
156
157 JNIHandleBlock* old_handles = thread->active_handles();
158 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread);
159 assert(new_handles != NULL, "should not be NULL");
160 new_handles->set_pop_frame_link(old_handles);
161 thread->set_active_handles(new_handles);
162 #endif
163 assert(thread == JavaThread::current(), "thread must be current!");
164 thread->frame_anchor()->make_walkable(thread);
165 };
166
167 ~JvmtiEventMark() {
168 #if 0
169 _hblock->clear(); // for consistency with future correct behavior
170 #else
171 // we want to use the code above - but that needs the JNIHandle changes - later...
172 // for now, steal JNI pop local frame code
173 JNIHandleBlock* old_handles = _thread->active_handles();
174 JNIHandleBlock* new_handles = old_handles->pop_frame_link();
175 assert(new_handles != NULL, "should not be NULL");
176 _thread->set_active_handles(new_handles);
177 // Note that we set the pop_frame_link to NULL explicitly, otherwise
178 // the release_block call will release the blocks.
179 old_handles->set_pop_frame_link(NULL);
180 JNIHandleBlock::release_block(old_handles, _thread); // may block
181 #endif
182
183 JvmtiThreadState* state = _thread->jvmti_thread_state();
184 // we are continuing after an event.
185 if (state != NULL) {
186 // Restore the jvmti thread exception state.
187 if (_exception_detected) {
188 state->set_exception_detected();
189 }
190 if (_exception_caught) {
191 state->set_exception_caught();
192 }
193 }
194 }
195
196 #if 0
197 jobject to_jobject(oop obj) { return obj == NULL? NULL : _hblock->allocate_handle_fast(obj); }
198 #else
199 // we want to use the code above - but that needs the JNIHandle changes - later...
200 // for now, use regular make_local
201 jobject to_jobject(oop obj) { return JNIHandles::make_local(_thread,obj); }
202 #endif
203
204 jclass to_jclass(Klass* klass) { return (klass == NULL ? NULL : (jclass)to_jobject(klass->java_mirror())); }
205
206 jmethodID to_jmethodID(methodHandle method) { return method->jmethod_id(); }
207
208 JNIEnv* jni_env() { return _jni_env; }
209 };
210
211 class JvmtiThreadEventMark : public JvmtiEventMark {
212 private:
213 jthread _jt;
214
215 public:
216 JvmtiThreadEventMark(JavaThread *thread) :
217 JvmtiEventMark(thread) {
218 _jt = (jthread)(to_jobject(thread->threadObj()));
219 };
220 jthread jni_thread() { return _jt; }
221 };
222
223 class JvmtiClassEventMark : public JvmtiThreadEventMark {
224 private:
225 jclass _jc;
226
227 public:
228 JvmtiClassEventMark(JavaThread *thread, Klass* klass) :
229 JvmtiThreadEventMark(thread) {
230 _jc = to_jclass(klass);
231 };
232 jclass jni_class() { return _jc; }
233 };
234
235 class JvmtiMethodEventMark : public JvmtiThreadEventMark {
236 private:
237 jmethodID _mid;
238
239 public:
240 JvmtiMethodEventMark(JavaThread *thread, methodHandle method) :
241 JvmtiThreadEventMark(thread),
242 _mid(to_jmethodID(method)) {};
243 jmethodID jni_methodID() { return _mid; }
244 };
245
246 class JvmtiLocationEventMark : public JvmtiMethodEventMark {
247 private:
248 jlocation _loc;
249
250 public:
251 JvmtiLocationEventMark(JavaThread *thread, methodHandle method, address location) :
252 JvmtiMethodEventMark(thread, method),
253 _loc(location - method->code_base()) {};
254 jlocation location() { return _loc; }
255 };
256
257 class JvmtiExceptionEventMark : public JvmtiLocationEventMark {
258 private:
259 jobject _exc;
260
261 public:
262 JvmtiExceptionEventMark(JavaThread *thread, methodHandle method, address location, Handle exception) :
263 JvmtiLocationEventMark(thread, method, location),
264 _exc(to_jobject(exception())) {};
265 jobject exception() { return _exc; }
266 };
267
268 class JvmtiClassFileLoadEventMark : public JvmtiThreadEventMark {
269 private:
270 const char *_class_name;
271 jobject _jloader;
272 jobject _protection_domain;
273 jclass _class_being_redefined;
274
275 public:
276 JvmtiClassFileLoadEventMark(JavaThread *thread, Symbol* name,
277 Handle class_loader, Handle prot_domain, KlassHandle *class_being_redefined) : JvmtiThreadEventMark(thread) {
278 _class_name = name != NULL? name->as_utf8() : NULL;
279 _jloader = (jobject)to_jobject(class_loader());
280 _protection_domain = (jobject)to_jobject(prot_domain());
281 if (class_being_redefined == NULL) {
282 _class_being_redefined = NULL;
283 } else {
284 _class_being_redefined = (jclass)to_jclass((*class_being_redefined)());
285 }
286 };
287 const char *class_name() {
288 return _class_name;
289 }
290 jobject jloader() {
291 return _jloader;
292 }
293 jobject protection_domain() {
294 return _protection_domain;
295 }
296 jclass class_being_redefined() {
297 return _class_being_redefined;
298 }
299 };
300
301 //////////////////////////////////////////////////////////////////////////////
302
303 int JvmtiExport::_field_access_count = 0;
304 int JvmtiExport::_field_modification_count = 0;
305
306 bool JvmtiExport::_can_access_local_variables = false;
307 bool JvmtiExport::_can_hotswap_or_post_breakpoint = false;
308 bool JvmtiExport::_can_modify_any_class = false;
309 bool JvmtiExport::_can_walk_any_space = false;
310
311 bool JvmtiExport::_has_redefined_a_class = false;
312 bool JvmtiExport::_all_dependencies_are_recorded = false;
313
314 //
315 // field access management
316 //
317
318 // interpreter generator needs the address of the counter
319 address JvmtiExport::get_field_access_count_addr() {
320 // We don't grab a lock because we don't want to
321 // serialize field access between all threads. This means that a
322 // thread on another processor can see the wrong count value and
323 // may either miss making a needed call into post_field_access()
324 // or will make an unneeded call into post_field_access(). We pay
325 // this price to avoid slowing down the VM when we aren't watching
326 // field accesses.
327 // Other access/mutation safe by virtue of being in VM state.
328 return (address)(&_field_access_count);
329 }
330
331 //
332 // field modification management
333 //
334
335 // interpreter generator needs the address of the counter
336 address JvmtiExport::get_field_modification_count_addr() {
337 // We don't grab a lock because we don't
338 // want to serialize field modification between all threads. This
339 // means that a thread on another processor can see the wrong
340 // count value and may either miss making a needed call into
341 // post_field_modification() or will make an unneeded call into
342 // post_field_modification(). We pay this price to avoid slowing
343 // down the VM when we aren't watching field modifications.
344 // Other access/mutation safe by virtue of being in VM state.
345 return (address)(&_field_modification_count);
346 }
347
348
349 ///////////////////////////////////////////////////////////////
350 // Functions needed by java.lang.instrument for starting up javaagent.
351 ///////////////////////////////////////////////////////////////
352
353 jint
354 JvmtiExport::get_jvmti_interface(JavaVM *jvm, void **penv, jint version) {
355 // The JVMTI_VERSION_INTERFACE_JVMTI part of the version number
356 // has already been validated in JNI GetEnv().
357 int major, minor, micro;
358
359 // micro version doesn't matter here (yet?)
360 decode_version_values(version, &major, &minor, µ);
361 switch (major) {
362 case 1:
363 switch (minor) {
364 case 0: // version 1.0.<micro> is recognized
365 case 1: // version 1.1.<micro> is recognized
366 case 2: // version 1.2.<micro> is recognized
367 break;
368
369 default:
370 return JNI_EVERSION; // unsupported minor version number
371 }
372 break;
373 case 9:
374 switch (minor) {
375 case 0: // version 9.0.<micro> is recognized
376 break;
377 default:
378 return JNI_EVERSION; // unsupported minor version number
379 }
380 break;
381 default:
382 return JNI_EVERSION; // unsupported major version number
383 }
384
385 if (JvmtiEnv::get_phase() == JVMTI_PHASE_LIVE) {
386 JavaThread* current_thread = JavaThread::current();
387 // transition code: native to VM
388 ThreadInVMfromNative __tiv(current_thread);
389 VM_ENTRY_BASE(jvmtiEnv*, JvmtiExport::get_jvmti_interface, current_thread)
390 debug_only(VMNativeEntryWrapper __vew;)
391
392 JvmtiEnv *jvmti_env = JvmtiEnv::create_a_jvmti(version);
393 *penv = jvmti_env->jvmti_external(); // actual type is jvmtiEnv* -- not to be confused with JvmtiEnv*
394 return JNI_OK;
395
396 } else if (JvmtiEnv::get_phase() == JVMTI_PHASE_ONLOAD) {
397 // not live, no thread to transition
398 JvmtiEnv *jvmti_env = JvmtiEnv::create_a_jvmti(version);
399 *penv = jvmti_env->jvmti_external(); // actual type is jvmtiEnv* -- not to be confused with JvmtiEnv*
400 return JNI_OK;
401
402 } else {
403 // Called at the wrong time
404 *penv = NULL;
405 return JNI_EDETACHED;
406 }
407 }
408
409 void
410 JvmtiExport::add_default_read_edges(Handle h_module, TRAPS) {
411 if (!Universe::is_module_initialized()) {
412 return; // extra safety
413 }
414 assert(!h_module.is_null(), "module should always be set");
415
416 // Invoke the transformedByAgent method
417 JavaValue result(T_VOID);
418 JavaCalls::call_static(&result,
419 SystemDictionary::module_Modules_klass(),
420 vmSymbols::transformedByAgent_name(),
421 vmSymbols::transformedByAgent_signature(),
422 h_module,
423 THREAD);
424
425 if (HAS_PENDING_EXCEPTION) {
426 java_lang_Throwable::print(PENDING_EXCEPTION, tty);
427 CLEAR_PENDING_EXCEPTION;
428 return;
429 }
430 }
431
432 void
433 JvmtiExport::decode_version_values(jint version, int * major, int * minor,
434 int * micro) {
435 *major = (version & JVMTI_VERSION_MASK_MAJOR) >> JVMTI_VERSION_SHIFT_MAJOR;
436 *minor = (version & JVMTI_VERSION_MASK_MINOR) >> JVMTI_VERSION_SHIFT_MINOR;
437 *micro = (version & JVMTI_VERSION_MASK_MICRO) >> JVMTI_VERSION_SHIFT_MICRO;
438 }
439
440 void JvmtiExport::enter_primordial_phase() {
441 JvmtiEnvBase::set_phase(JVMTI_PHASE_PRIMORDIAL);
442 }
443
444 void JvmtiExport::enter_early_start_phase() {
445 JvmtiManageCapabilities::recompute_always_capabilities();
446 set_early_vmstart_recorded(true);
447 }
448
449 void JvmtiExport::enter_start_phase() {
450 JvmtiManageCapabilities::recompute_always_capabilities();
451 JvmtiEnvBase::set_phase(JVMTI_PHASE_START);
452 }
453
454 void JvmtiExport::enter_onload_phase() {
455 JvmtiEnvBase::set_phase(JVMTI_PHASE_ONLOAD);
456 }
457
458 void JvmtiExport::enter_live_phase() {
459 JvmtiEnvBase::set_phase(JVMTI_PHASE_LIVE);
460 }
461
462 //
463 // JVMTI events that the VM posts to the debugger and also startup agent
464 // and call the agent's premain() for java.lang.instrument.
465 //
466
467 void JvmtiExport::post_early_vm_start() {
468 EVT_TRIG_TRACE(JVMTI_EVENT_VM_START, ("JVMTI Trg Early VM start event triggered" ));
469
470 // can now enable some events
471 JvmtiEventController::vm_start();
472
473 JvmtiEnvIterator it;
474 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
475 // Only early vmstart envs post early VMStart event
476 if (env->early_vmstart_env() && env->is_enabled(JVMTI_EVENT_VM_START)) {
477 EVT_TRACE(JVMTI_EVENT_VM_START, ("JVMTI Evt Early VM start event sent" ));
478 JavaThread *thread = JavaThread::current();
479 JvmtiThreadEventMark jem(thread);
480 JvmtiJavaThreadEventTransition jet(thread);
481 jvmtiEventVMStart callback = env->callbacks()->VMStart;
482 if (callback != NULL) {
483 (*callback)(env->jvmti_external(), jem.jni_env());
484 }
485 }
486 }
487 }
488
489 void JvmtiExport::post_vm_start() {
490 EVT_TRIG_TRACE(JVMTI_EVENT_VM_START, ("JVMTI Trg VM start event triggered" ));
491
492 // can now enable some events
493 JvmtiEventController::vm_start();
494
495 JvmtiEnvIterator it;
496 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
497 // Early vmstart envs do not post normal VMStart event
498 if (!env->early_vmstart_env() && env->is_enabled(JVMTI_EVENT_VM_START)) {
499 EVT_TRACE(JVMTI_EVENT_VM_START, ("JVMTI Evt VM start event sent" ));
500
501 JavaThread *thread = JavaThread::current();
502 JvmtiThreadEventMark jem(thread);
503 JvmtiJavaThreadEventTransition jet(thread);
504 jvmtiEventVMStart callback = env->callbacks()->VMStart;
505 if (callback != NULL) {
506 (*callback)(env->jvmti_external(), jem.jni_env());
507 }
508 }
509 }
510 }
511
512
513 void JvmtiExport::post_vm_initialized() {
514 EVT_TRIG_TRACE(JVMTI_EVENT_VM_INIT, ("JVMTI Trg VM init event triggered" ));
515
516 // can now enable events
517 JvmtiEventController::vm_init();
518
519 JvmtiEnvIterator it;
520 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
521 if (env->is_enabled(JVMTI_EVENT_VM_INIT)) {
522 EVT_TRACE(JVMTI_EVENT_VM_INIT, ("JVMTI Evt VM init event sent" ));
523
524 JavaThread *thread = JavaThread::current();
525 JvmtiThreadEventMark jem(thread);
526 JvmtiJavaThreadEventTransition jet(thread);
527 jvmtiEventVMInit callback = env->callbacks()->VMInit;
528 if (callback != NULL) {
529 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread());
530 }
531 }
532 }
533 }
534
535
536 void JvmtiExport::post_vm_death() {
537 EVT_TRIG_TRACE(JVMTI_EVENT_VM_DEATH, ("JVMTI Trg VM death event triggered" ));
538
539 JvmtiEnvIterator it;
540 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
541 if (env->is_enabled(JVMTI_EVENT_VM_DEATH)) {
542 EVT_TRACE(JVMTI_EVENT_VM_DEATH, ("JVMTI Evt VM death event sent" ));
543
544 JavaThread *thread = JavaThread::current();
545 JvmtiEventMark jem(thread);
546 JvmtiJavaThreadEventTransition jet(thread);
547 jvmtiEventVMDeath callback = env->callbacks()->VMDeath;
548 if (callback != NULL) {
549 (*callback)(env->jvmti_external(), jem.jni_env());
550 }
551 }
552 }
553
554 JvmtiEnvBase::set_phase(JVMTI_PHASE_DEAD);
555 JvmtiEventController::vm_death();
556 }
557
558 char**
559 JvmtiExport::get_all_native_method_prefixes(int* count_ptr) {
560 // Have to grab JVMTI thread state lock to be sure environment doesn't
561 // go away while we iterate them. No locks during VM bring-up.
562 if (Threads::number_of_threads() == 0 || SafepointSynchronize::is_at_safepoint()) {
563 return JvmtiEnvBase::get_all_native_method_prefixes(count_ptr);
564 } else {
565 MutexLocker mu(JvmtiThreadState_lock);
566 return JvmtiEnvBase::get_all_native_method_prefixes(count_ptr);
567 }
568 }
569
570 class JvmtiClassFileLoadHookPoster : public StackObj {
571 private:
572 Symbol* _h_name;
573 Handle _class_loader;
574 Handle _h_protection_domain;
575 unsigned char ** _data_ptr;
576 unsigned char ** _end_ptr;
577 JavaThread * _thread;
578 jint _curr_len;
579 unsigned char * _curr_data;
580 JvmtiEnv * _curr_env;
581 JvmtiCachedClassFileData ** _cached_class_file_ptr;
582 JvmtiThreadState * _state;
583 KlassHandle * _h_class_being_redefined;
584 JvmtiClassLoadKind _load_kind;
585
586 public:
587 inline JvmtiClassFileLoadHookPoster(Symbol* h_name, Handle class_loader,
588 Handle h_protection_domain,
589 unsigned char **data_ptr, unsigned char **end_ptr,
590 JvmtiCachedClassFileData **cache_ptr) {
591 _h_name = h_name;
592 _class_loader = class_loader;
593 _h_protection_domain = h_protection_domain;
594 _data_ptr = data_ptr;
595 _end_ptr = end_ptr;
596 _thread = JavaThread::current();
597 _curr_len = *end_ptr - *data_ptr;
598 _curr_data = *data_ptr;
599 _curr_env = NULL;
600 _cached_class_file_ptr = cache_ptr;
601
602 _state = _thread->jvmti_thread_state();
603 if (_state != NULL) {
604 _h_class_being_redefined = _state->get_class_being_redefined();
605 _load_kind = _state->get_class_load_kind();
606 Klass* klass = (_h_class_being_redefined == NULL) ? NULL : (*_h_class_being_redefined)();
607 if (_load_kind != jvmti_class_load_kind_load && klass != NULL) {
608 ModuleEntry* module_entry = InstanceKlass::cast(klass)->module();
609 assert(module_entry != NULL, "module_entry should always be set");
610 if (module_entry->is_named() &&
611 module_entry->module() != NULL &&
612 !module_entry->has_default_read_edges()) {
613 if (!module_entry->set_has_default_read_edges()) {
614 // We won a potential race.
615 // Add read edges to the unnamed modules of the bootstrap and app class loaders
616 Handle class_module(_thread, JNIHandles::resolve(module_entry->module())); // Obtain j.l.r.Module
617 JvmtiExport::add_default_read_edges(class_module, _thread);
618 }
619 }
620 }
621 // Clear class_being_redefined flag here. The action
622 // from agent handler could generate a new class file load
623 // hook event and if it is not cleared the new event generated
624 // from regular class file load could have this stale redefined
625 // class handle info.
626 _state->clear_class_being_redefined();
627 } else {
628 // redefine and retransform will always set the thread state
629 _h_class_being_redefined = (KlassHandle *) NULL;
630 _load_kind = jvmti_class_load_kind_load;
631 }
632 }
633
634 void post() {
635 // EVT_TRIG_TRACE(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK,
636 // ("JVMTI [%s] class file load hook event triggered",
637 // JvmtiTrace::safe_get_thread_name(_thread)));
638 post_all_envs();
639 copy_modified_data();
640 }
641
642 private:
643 void post_all_envs() {
644 if (_load_kind != jvmti_class_load_kind_retransform) {
645 // for class load and redefine,
646 // call the non-retransformable agents
647 JvmtiEnvIterator it;
648 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
649 if (!env->is_retransformable() && env->is_enabled(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK)) {
650 // non-retransformable agents cannot retransform back,
651 // so no need to cache the original class file bytes
652 post_to_env(env, false);
653 }
654 }
655 }
656 JvmtiEnvIterator it;
657 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
658 // retransformable agents get all events
659 if (env->is_retransformable() && env->is_enabled(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK)) {
660 // retransformable agents need to cache the original class file
661 // bytes if changes are made via the ClassFileLoadHook
662 post_to_env(env, true);
663 }
664 }
665 }
666
667 void post_to_env(JvmtiEnv* env, bool caching_needed) {
668 if (env->phase() == JVMTI_PHASE_PRIMORDIAL && !env->early_class_hook_env()) {
669 return;
670 }
671 unsigned char *new_data = NULL;
672 jint new_len = 0;
673 // EVT_TRACE(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK,
674 // ("JVMTI [%s] class file load hook event sent %s data_ptr = %d, data_len = %d",
675 // JvmtiTrace::safe_get_thread_name(_thread),
676 // _h_name == NULL ? "NULL" : _h_name->as_utf8(),
677 // _curr_data, _curr_len ));
678 JvmtiClassFileLoadEventMark jem(_thread, _h_name, _class_loader,
679 _h_protection_domain,
680 _h_class_being_redefined);
681 JvmtiJavaThreadEventTransition jet(_thread);
682 jvmtiEventClassFileLoadHook callback = env->callbacks()->ClassFileLoadHook;
683 if (callback != NULL) {
684 (*callback)(env->jvmti_external(), jem.jni_env(),
685 jem.class_being_redefined(),
686 jem.jloader(), jem.class_name(),
687 jem.protection_domain(),
688 _curr_len, _curr_data,
689 &new_len, &new_data);
690 }
691 if (new_data != NULL) {
692 // this agent has modified class data.
693 if (caching_needed && *_cached_class_file_ptr == NULL) {
694 // data has been changed by the new retransformable agent
695 // and it hasn't already been cached, cache it
696 JvmtiCachedClassFileData *p;
697 p = (JvmtiCachedClassFileData *)os::malloc(
698 offset_of(JvmtiCachedClassFileData, data) + _curr_len, mtInternal);
699 if (p == NULL) {
700 vm_exit_out_of_memory(offset_of(JvmtiCachedClassFileData, data) + _curr_len,
701 OOM_MALLOC_ERROR,
702 "unable to allocate cached copy of original class bytes");
703 }
704 p->length = _curr_len;
705 memcpy(p->data, _curr_data, _curr_len);
706 *_cached_class_file_ptr = p;
707 }
708
709 if (_curr_data != *_data_ptr) {
710 // curr_data is previous agent modified class data.
711 // And this has been changed by the new agent so
712 // we can delete it now.
713 _curr_env->Deallocate(_curr_data);
714 }
715
716 // Class file data has changed by the current agent.
717 _curr_data = new_data;
718 _curr_len = new_len;
719 // Save the current agent env we need this to deallocate the
720 // memory allocated by this agent.
721 _curr_env = env;
722 }
723 }
724
725 void copy_modified_data() {
726 // if one of the agent has modified class file data.
727 // Copy modified class data to new resources array.
728 if (_curr_data != *_data_ptr) {
729 *_data_ptr = NEW_RESOURCE_ARRAY(u1, _curr_len);
730 memcpy(*_data_ptr, _curr_data, _curr_len);
731 *_end_ptr = *_data_ptr + _curr_len;
732 _curr_env->Deallocate(_curr_data);
733 }
734 }
735 };
736
737 bool JvmtiExport::_should_post_class_file_load_hook = false;
738
739 // this entry is for class file load hook on class load, redefine and retransform
740 void JvmtiExport::post_class_file_load_hook(Symbol* h_name,
741 Handle class_loader,
742 Handle h_protection_domain,
743 unsigned char **data_ptr,
744 unsigned char **end_ptr,
745 JvmtiCachedClassFileData **cache_ptr) {
746 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) {
747 return;
748 }
749
750 JvmtiClassFileLoadHookPoster poster(h_name, class_loader,
751 h_protection_domain,
752 data_ptr, end_ptr,
753 cache_ptr);
754 poster.post();
755 }
756
757 void JvmtiExport::report_unsupported(bool on) {
758 // If any JVMTI service is turned on, we need to exit before native code
759 // tries to access nonexistant services.
760 if (on) {
761 vm_exit_during_initialization("Java Kernel does not support JVMTI.");
762 }
763 }
764
765
766 static inline Klass* oop_to_klass(oop obj) {
767 Klass* k = obj->klass();
768
769 // if the object is a java.lang.Class then return the java mirror
770 if (k == SystemDictionary::Class_klass()) {
771 if (!java_lang_Class::is_primitive(obj)) {
772 k = java_lang_Class::as_Klass(obj);
773 assert(k != NULL, "class for non-primitive mirror must exist");
774 }
775 }
776 return k;
777 }
778
779 class JvmtiVMObjectAllocEventMark : public JvmtiClassEventMark {
780 private:
781 jobject _jobj;
782 jlong _size;
783 public:
784 JvmtiVMObjectAllocEventMark(JavaThread *thread, oop obj) : JvmtiClassEventMark(thread, oop_to_klass(obj)) {
785 _jobj = (jobject)to_jobject(obj);
786 _size = obj->size() * wordSize;
787 };
788 jobject jni_jobject() { return _jobj; }
789 jlong size() { return _size; }
790 };
791
792 class JvmtiCompiledMethodLoadEventMark : public JvmtiMethodEventMark {
793 private:
794 jint _code_size;
795 const void *_code_data;
796 jint _map_length;
797 jvmtiAddrLocationMap *_map;
798 const void *_compile_info;
799 public:
800 JvmtiCompiledMethodLoadEventMark(JavaThread *thread, nmethod *nm, void* compile_info_ptr = NULL)
801 : JvmtiMethodEventMark(thread,methodHandle(thread, nm->method())) {
802 _code_data = nm->insts_begin();
803 _code_size = nm->insts_size();
804 _compile_info = compile_info_ptr; // Set void pointer of compiledMethodLoad Event. Default value is NULL.
805 JvmtiCodeBlobEvents::build_jvmti_addr_location_map(nm, &_map, &_map_length);
806 }
807 ~JvmtiCompiledMethodLoadEventMark() {
808 FREE_C_HEAP_ARRAY(jvmtiAddrLocationMap, _map);
809 }
810
811 jint code_size() { return _code_size; }
812 const void *code_data() { return _code_data; }
813 jint map_length() { return _map_length; }
814 const jvmtiAddrLocationMap* map() { return _map; }
815 const void *compile_info() { return _compile_info; }
816 };
817
818
819
820 class JvmtiMonitorEventMark : public JvmtiThreadEventMark {
821 private:
822 jobject _jobj;
823 public:
824 JvmtiMonitorEventMark(JavaThread *thread, oop object)
825 : JvmtiThreadEventMark(thread){
826 _jobj = to_jobject(object);
827 }
828 jobject jni_object() { return _jobj; }
829 };
830
831 ///////////////////////////////////////////////////////////////
832 //
833 // pending CompiledMethodUnload support
834 //
835
836 void JvmtiExport::post_compiled_method_unload(
837 jmethodID method, const void *code_begin) {
838 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) {
839 return;
840 }
841 JavaThread* thread = JavaThread::current();
842 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_UNLOAD,
843 ("JVMTI [%s] method compile unload event triggered",
844 JvmtiTrace::safe_get_thread_name(thread)));
845
846 // post the event for each environment that has this event enabled.
847 JvmtiEnvIterator it;
848 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
849 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_UNLOAD)) {
850 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) {
851 continue;
852 }
853 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_UNLOAD,
854 ("JVMTI [%s] class compile method unload event sent jmethodID " PTR_FORMAT,
855 JvmtiTrace::safe_get_thread_name(thread), p2i(method)));
856
857 ResourceMark rm(thread);
858
859 JvmtiEventMark jem(thread);
860 JvmtiJavaThreadEventTransition jet(thread);
861 jvmtiEventCompiledMethodUnload callback = env->callbacks()->CompiledMethodUnload;
862 if (callback != NULL) {
863 (*callback)(env->jvmti_external(), method, code_begin);
864 }
865 }
866 }
867 }
868
869 ///////////////////////////////////////////////////////////////
870 //
871 // JvmtiExport
872 //
873
874 void JvmtiExport::post_raw_breakpoint(JavaThread *thread, Method* method, address location) {
875 HandleMark hm(thread);
876 methodHandle mh(thread, method);
877
878 JvmtiThreadState *state = thread->jvmti_thread_state();
879 if (state == NULL) {
880 return;
881 }
882 EVT_TRIG_TRACE(JVMTI_EVENT_BREAKPOINT, ("JVMTI [%s] Trg Breakpoint triggered",
883 JvmtiTrace::safe_get_thread_name(thread)));
884 JvmtiEnvThreadStateIterator it(state);
885 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
886 ets->compare_and_set_current_location(mh(), location, JVMTI_EVENT_BREAKPOINT);
887 if (!ets->breakpoint_posted() && ets->is_enabled(JVMTI_EVENT_BREAKPOINT)) {
888 ThreadState old_os_state = thread->osthread()->get_state();
889 thread->osthread()->set_state(BREAKPOINTED);
890 EVT_TRACE(JVMTI_EVENT_BREAKPOINT, ("JVMTI [%s] Evt Breakpoint sent %s.%s @ " INTX_FORMAT,
891 JvmtiTrace::safe_get_thread_name(thread),
892 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
893 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
894 location - mh()->code_base() ));
895
896 JvmtiEnv *env = ets->get_env();
897 JvmtiLocationEventMark jem(thread, mh, location);
898 JvmtiJavaThreadEventTransition jet(thread);
899 jvmtiEventBreakpoint callback = env->callbacks()->Breakpoint;
900 if (callback != NULL) {
901 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
902 jem.jni_methodID(), jem.location());
903 }
904
905 ets->set_breakpoint_posted();
906 thread->osthread()->set_state(old_os_state);
907 }
908 }
909 }
910
911 //////////////////////////////////////////////////////////////////////////////
912
913 bool JvmtiExport::_can_get_source_debug_extension = false;
914 bool JvmtiExport::_can_maintain_original_method_order = false;
915 bool JvmtiExport::_can_post_interpreter_events = false;
916 bool JvmtiExport::_can_post_on_exceptions = false;
917 bool JvmtiExport::_can_post_breakpoint = false;
918 bool JvmtiExport::_can_post_field_access = false;
919 bool JvmtiExport::_can_post_field_modification = false;
920 bool JvmtiExport::_can_post_method_entry = false;
921 bool JvmtiExport::_can_post_method_exit = false;
922 bool JvmtiExport::_can_pop_frame = false;
923 bool JvmtiExport::_can_force_early_return = false;
924
925 bool JvmtiExport::_early_vmstart_recorded = false;
926
927 bool JvmtiExport::_should_post_single_step = false;
928 bool JvmtiExport::_should_post_field_access = false;
929 bool JvmtiExport::_should_post_field_modification = false;
930 bool JvmtiExport::_should_post_class_load = false;
931 bool JvmtiExport::_should_post_class_prepare = false;
932 bool JvmtiExport::_should_post_class_unload = false;
933 bool JvmtiExport::_should_post_thread_life = false;
934 bool JvmtiExport::_should_clean_up_heap_objects = false;
935 bool JvmtiExport::_should_post_native_method_bind = false;
936 bool JvmtiExport::_should_post_dynamic_code_generated = false;
937 bool JvmtiExport::_should_post_data_dump = false;
938 bool JvmtiExport::_should_post_compiled_method_load = false;
939 bool JvmtiExport::_should_post_compiled_method_unload = false;
940 bool JvmtiExport::_should_post_monitor_contended_enter = false;
941 bool JvmtiExport::_should_post_monitor_contended_entered = false;
942 bool JvmtiExport::_should_post_monitor_wait = false;
943 bool JvmtiExport::_should_post_monitor_waited = false;
944 bool JvmtiExport::_should_post_garbage_collection_start = false;
945 bool JvmtiExport::_should_post_garbage_collection_finish = false;
946 bool JvmtiExport::_should_post_object_free = false;
947 bool JvmtiExport::_should_post_resource_exhausted = false;
948 bool JvmtiExport::_should_post_vm_object_alloc = false;
949 bool JvmtiExport::_should_post_on_exceptions = false;
950
951 ////////////////////////////////////////////////////////////////////////////////////////////////
952
953
954 //
955 // JVMTI single step management
956 //
957 void JvmtiExport::at_single_stepping_point(JavaThread *thread, Method* method, address location) {
958 assert(JvmtiExport::should_post_single_step(), "must be single stepping");
959
960 HandleMark hm(thread);
961 methodHandle mh(thread, method);
962
963 // update information about current location and post a step event
964 JvmtiThreadState *state = thread->jvmti_thread_state();
965 if (state == NULL) {
966 return;
967 }
968 EVT_TRIG_TRACE(JVMTI_EVENT_SINGLE_STEP, ("JVMTI [%s] Trg Single Step triggered",
969 JvmtiTrace::safe_get_thread_name(thread)));
970 if (!state->hide_single_stepping()) {
971 if (state->is_pending_step_for_popframe()) {
972 state->process_pending_step_for_popframe();
973 }
974 if (state->is_pending_step_for_earlyret()) {
975 state->process_pending_step_for_earlyret();
976 }
977 JvmtiExport::post_single_step(thread, mh(), location);
978 }
979 }
980
981
982 void JvmtiExport::expose_single_stepping(JavaThread *thread) {
983 JvmtiThreadState *state = thread->jvmti_thread_state();
984 if (state != NULL) {
985 state->clear_hide_single_stepping();
986 }
987 }
988
989
990 bool JvmtiExport::hide_single_stepping(JavaThread *thread) {
991 JvmtiThreadState *state = thread->jvmti_thread_state();
992 if (state != NULL && state->is_enabled(JVMTI_EVENT_SINGLE_STEP)) {
993 state->set_hide_single_stepping();
994 return true;
995 } else {
996 return false;
997 }
998 }
999
1000 void JvmtiExport::post_class_load(JavaThread *thread, Klass* klass) {
1001 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) {
1002 return;
1003 }
1004 HandleMark hm(thread);
1005 KlassHandle kh(thread, klass);
1006
1007 EVT_TRIG_TRACE(JVMTI_EVENT_CLASS_LOAD, ("JVMTI [%s] Trg Class Load triggered",
1008 JvmtiTrace::safe_get_thread_name(thread)));
1009 JvmtiThreadState* state = thread->jvmti_thread_state();
1010 if (state == NULL) {
1011 return;
1012 }
1013 JvmtiEnvThreadStateIterator it(state);
1014 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1015 if (ets->is_enabled(JVMTI_EVENT_CLASS_LOAD)) {
1016 JvmtiEnv *env = ets->get_env();
1017 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) {
1018 continue;
1019 }
1020 EVT_TRACE(JVMTI_EVENT_CLASS_LOAD, ("JVMTI [%s] Evt Class Load sent %s",
1021 JvmtiTrace::safe_get_thread_name(thread),
1022 kh()==NULL? "NULL" : kh()->external_name() ));
1023 JvmtiClassEventMark jem(thread, kh());
1024 JvmtiJavaThreadEventTransition jet(thread);
1025 jvmtiEventClassLoad callback = env->callbacks()->ClassLoad;
1026 if (callback != NULL) {
1027 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_class());
1028 }
1029 }
1030 }
1031 }
1032
1033
1034 void JvmtiExport::post_class_prepare(JavaThread *thread, Klass* klass) {
1035 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) {
1036 return;
1037 }
1038 HandleMark hm(thread);
1039 KlassHandle kh(thread, klass);
1040
1041 EVT_TRIG_TRACE(JVMTI_EVENT_CLASS_PREPARE, ("JVMTI [%s] Trg Class Prepare triggered",
1042 JvmtiTrace::safe_get_thread_name(thread)));
1043 JvmtiThreadState* state = thread->jvmti_thread_state();
1044 if (state == NULL) {
1045 return;
1046 }
1047 JvmtiEnvThreadStateIterator it(state);
1048 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1049 if (ets->is_enabled(JVMTI_EVENT_CLASS_PREPARE)) {
1050 JvmtiEnv *env = ets->get_env();
1051 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) {
1052 continue;
1053 }
1054 EVT_TRACE(JVMTI_EVENT_CLASS_PREPARE, ("JVMTI [%s] Evt Class Prepare sent %s",
1055 JvmtiTrace::safe_get_thread_name(thread),
1056 kh()==NULL? "NULL" : kh()->external_name() ));
1057 JvmtiClassEventMark jem(thread, kh());
1058 JvmtiJavaThreadEventTransition jet(thread);
1059 jvmtiEventClassPrepare callback = env->callbacks()->ClassPrepare;
1060 if (callback != NULL) {
1061 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_class());
1062 }
1063 }
1064 }
1065 }
1066
1067 void JvmtiExport::post_class_unload(Klass* klass) {
1068 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) {
1069 return;
1070 }
1071 Thread *thread = Thread::current();
1072 HandleMark hm(thread);
1073 KlassHandle kh(thread, klass);
1074
1075 EVT_TRIG_TRACE(EXT_EVENT_CLASS_UNLOAD, ("JVMTI [?] Trg Class Unload triggered" ));
1076 if (JvmtiEventController::is_enabled((jvmtiEvent)EXT_EVENT_CLASS_UNLOAD)) {
1077 assert(thread->is_VM_thread(), "wrong thread");
1078
1079 // get JavaThread for whom we are proxy
1080 JavaThread *real_thread =
1081 (JavaThread *)((VMThread *)thread)->vm_operation()->calling_thread();
1082
1083 JvmtiEnvIterator it;
1084 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1085 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) {
1086 continue;
1087 }
1088 if (env->is_enabled((jvmtiEvent)EXT_EVENT_CLASS_UNLOAD)) {
1089 EVT_TRACE(EXT_EVENT_CLASS_UNLOAD, ("JVMTI [?] Evt Class Unload sent %s",
1090 kh()==NULL? "NULL" : kh()->external_name() ));
1091
1092 // do everything manually, since this is a proxy - needs special care
1093 JNIEnv* jni_env = real_thread->jni_environment();
1094 jthread jt = (jthread)JNIHandles::make_local(real_thread, real_thread->threadObj());
1095 jclass jk = (jclass)JNIHandles::make_local(real_thread, kh()->java_mirror());
1096
1097 // Before we call the JVMTI agent, we have to set the state in the
1098 // thread for which we are proxying.
1099 JavaThreadState prev_state = real_thread->thread_state();
1100 assert(((Thread *)real_thread)->is_ConcurrentGC_thread() ||
1101 (real_thread->is_Java_thread() && prev_state == _thread_blocked),
1102 "should be ConcurrentGCThread or JavaThread at safepoint");
1103 real_thread->set_thread_state(_thread_in_native);
1104
1105 jvmtiExtensionEvent callback = env->ext_callbacks()->ClassUnload;
1106 if (callback != NULL) {
1107 (*callback)(env->jvmti_external(), jni_env, jt, jk);
1108 }
1109
1110 assert(real_thread->thread_state() == _thread_in_native,
1111 "JavaThread should be in native");
1112 real_thread->set_thread_state(prev_state);
1113
1114 JNIHandles::destroy_local(jk);
1115 JNIHandles::destroy_local(jt);
1116 }
1117 }
1118 }
1119 }
1120
1121
1122 void JvmtiExport::post_thread_start(JavaThread *thread) {
1123 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) {
1124 return;
1125 }
1126 assert(thread->thread_state() == _thread_in_vm, "must be in vm state");
1127
1128 EVT_TRIG_TRACE(JVMTI_EVENT_THREAD_START, ("JVMTI [%s] Trg Thread Start event triggered",
1129 JvmtiTrace::safe_get_thread_name(thread)));
1130
1131 // do JVMTI thread initialization (if needed)
1132 JvmtiEventController::thread_started(thread);
1133
1134 // Do not post thread start event for hidden java thread.
1135 if (JvmtiEventController::is_enabled(JVMTI_EVENT_THREAD_START) &&
1136 !thread->is_hidden_from_external_view()) {
1137 JvmtiEnvIterator it;
1138 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1139 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) {
1140 continue;
1141 }
1142 if (env->is_enabled(JVMTI_EVENT_THREAD_START)) {
1143 EVT_TRACE(JVMTI_EVENT_THREAD_START, ("JVMTI [%s] Evt Thread Start event sent",
1144 JvmtiTrace::safe_get_thread_name(thread) ));
1145
1146 JvmtiThreadEventMark jem(thread);
1147 JvmtiJavaThreadEventTransition jet(thread);
1148 jvmtiEventThreadStart callback = env->callbacks()->ThreadStart;
1149 if (callback != NULL) {
1150 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread());
1151 }
1152 }
1153 }
1154 }
1155 }
1156
1157
1158 void JvmtiExport::post_thread_end(JavaThread *thread) {
1159 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) {
1160 return;
1161 }
1162 EVT_TRIG_TRACE(JVMTI_EVENT_THREAD_END, ("JVMTI [%s] Trg Thread End event triggered",
1163 JvmtiTrace::safe_get_thread_name(thread)));
1164
1165 JvmtiThreadState *state = thread->jvmti_thread_state();
1166 if (state == NULL) {
1167 return;
1168 }
1169
1170 // Do not post thread end event for hidden java thread.
1171 if (state->is_enabled(JVMTI_EVENT_THREAD_END) &&
1172 !thread->is_hidden_from_external_view()) {
1173
1174 JvmtiEnvThreadStateIterator it(state);
1175 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1176 if (ets->is_enabled(JVMTI_EVENT_THREAD_END)) {
1177 JvmtiEnv *env = ets->get_env();
1178 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) {
1179 continue;
1180 }
1181 EVT_TRACE(JVMTI_EVENT_THREAD_END, ("JVMTI [%s] Evt Thread End event sent",
1182 JvmtiTrace::safe_get_thread_name(thread) ));
1183
1184 JvmtiThreadEventMark jem(thread);
1185 JvmtiJavaThreadEventTransition jet(thread);
1186 jvmtiEventThreadEnd callback = env->callbacks()->ThreadEnd;
1187 if (callback != NULL) {
1188 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread());
1189 }
1190 }
1191 }
1192 }
1193 }
1194
1195 void JvmtiExport::post_object_free(JvmtiEnv* env, jlong tag) {
1196 assert(SafepointSynchronize::is_at_safepoint(), "must be executed at safepoint");
1197 assert(env->is_enabled(JVMTI_EVENT_OBJECT_FREE), "checking");
1198
1199 EVT_TRIG_TRACE(JVMTI_EVENT_OBJECT_FREE, ("JVMTI [?] Trg Object Free triggered" ));
1200 EVT_TRACE(JVMTI_EVENT_OBJECT_FREE, ("JVMTI [?] Evt Object Free sent"));
1201
1202 jvmtiEventObjectFree callback = env->callbacks()->ObjectFree;
1203 if (callback != NULL) {
1204 (*callback)(env->jvmti_external(), tag);
1205 }
1206 }
1207
1208 void JvmtiExport::post_resource_exhausted(jint resource_exhausted_flags, const char* description) {
1209 EVT_TRIG_TRACE(JVMTI_EVENT_RESOURCE_EXHAUSTED, ("JVMTI Trg resource exhausted event triggered" ));
1210
1211 JvmtiEnvIterator it;
1212 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1213 if (env->is_enabled(JVMTI_EVENT_RESOURCE_EXHAUSTED)) {
1214 EVT_TRACE(JVMTI_EVENT_RESOURCE_EXHAUSTED, ("JVMTI Evt resource exhausted event sent" ));
1215
1216 JavaThread *thread = JavaThread::current();
1217 JvmtiThreadEventMark jem(thread);
1218 JvmtiJavaThreadEventTransition jet(thread);
1219 jvmtiEventResourceExhausted callback = env->callbacks()->ResourceExhausted;
1220 if (callback != NULL) {
1221 (*callback)(env->jvmti_external(), jem.jni_env(),
1222 resource_exhausted_flags, NULL, description);
1223 }
1224 }
1225 }
1226 }
1227
1228 void JvmtiExport::post_method_entry(JavaThread *thread, Method* method, frame current_frame) {
1229 HandleMark hm(thread);
1230 methodHandle mh(thread, method);
1231
1232 EVT_TRIG_TRACE(JVMTI_EVENT_METHOD_ENTRY, ("JVMTI [%s] Trg Method Entry triggered %s.%s",
1233 JvmtiTrace::safe_get_thread_name(thread),
1234 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1235 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1236
1237 JvmtiThreadState* state = thread->jvmti_thread_state();
1238 if (state == NULL || !state->is_interp_only_mode()) {
1239 // for any thread that actually wants method entry, interp_only_mode is set
1240 return;
1241 }
1242
1243 state->incr_cur_stack_depth();
1244
1245 if (state->is_enabled(JVMTI_EVENT_METHOD_ENTRY)) {
1246 JvmtiEnvThreadStateIterator it(state);
1247 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1248 if (ets->is_enabled(JVMTI_EVENT_METHOD_ENTRY)) {
1249 EVT_TRACE(JVMTI_EVENT_METHOD_ENTRY, ("JVMTI [%s] Evt Method Entry sent %s.%s",
1250 JvmtiTrace::safe_get_thread_name(thread),
1251 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1252 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1253
1254 JvmtiEnv *env = ets->get_env();
1255 JvmtiMethodEventMark jem(thread, mh);
1256 JvmtiJavaThreadEventTransition jet(thread);
1257 jvmtiEventMethodEntry callback = env->callbacks()->MethodEntry;
1258 if (callback != NULL) {
1259 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_methodID());
1260 }
1261 }
1262 }
1263 }
1264 }
1265
1266 void JvmtiExport::post_method_exit(JavaThread *thread, Method* method, frame current_frame) {
1267 HandleMark hm(thread);
1268 methodHandle mh(thread, method);
1269
1270 EVT_TRIG_TRACE(JVMTI_EVENT_METHOD_EXIT, ("JVMTI [%s] Trg Method Exit triggered %s.%s",
1271 JvmtiTrace::safe_get_thread_name(thread),
1272 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1273 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1274
1275 JvmtiThreadState *state = thread->jvmti_thread_state();
1276 if (state == NULL || !state->is_interp_only_mode()) {
1277 // for any thread that actually wants method exit, interp_only_mode is set
1278 return;
1279 }
1280
1281 // return a flag when a method terminates by throwing an exception
1282 // i.e. if an exception is thrown and it's not caught by the current method
1283 bool exception_exit = state->is_exception_detected() && !state->is_exception_caught();
1284
1285
1286 if (state->is_enabled(JVMTI_EVENT_METHOD_EXIT)) {
1287 Handle result;
1288 jvalue value;
1289 value.j = 0L;
1290
1291 // if the method hasn't been popped because of an exception then we populate
1292 // the return_value parameter for the callback. At this point we only have
1293 // the address of a "raw result" and we just call into the interpreter to
1294 // convert this into a jvalue.
1295 if (!exception_exit) {
1296 oop oop_result;
1297 BasicType type = current_frame.interpreter_frame_result(&oop_result, &value);
1298 if (type == T_OBJECT || type == T_ARRAY) {
1299 result = Handle(thread, oop_result);
1300 }
1301 }
1302
1303 JvmtiEnvThreadStateIterator it(state);
1304 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1305 if (ets->is_enabled(JVMTI_EVENT_METHOD_EXIT)) {
1306 EVT_TRACE(JVMTI_EVENT_METHOD_EXIT, ("JVMTI [%s] Evt Method Exit sent %s.%s",
1307 JvmtiTrace::safe_get_thread_name(thread),
1308 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1309 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1310
1311 JvmtiEnv *env = ets->get_env();
1312 JvmtiMethodEventMark jem(thread, mh);
1313 if (result.not_null()) {
1314 value.l = JNIHandles::make_local(thread, result());
1315 }
1316 JvmtiJavaThreadEventTransition jet(thread);
1317 jvmtiEventMethodExit callback = env->callbacks()->MethodExit;
1318 if (callback != NULL) {
1319 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1320 jem.jni_methodID(), exception_exit, value);
1321 }
1322 }
1323 }
1324 }
1325
1326 if (state->is_enabled(JVMTI_EVENT_FRAME_POP)) {
1327 JvmtiEnvThreadStateIterator it(state);
1328 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1329 int cur_frame_number = state->cur_stack_depth();
1330
1331 if (ets->is_frame_pop(cur_frame_number)) {
1332 // we have a NotifyFramePop entry for this frame.
1333 // now check that this env/thread wants this event
1334 if (ets->is_enabled(JVMTI_EVENT_FRAME_POP)) {
1335 EVT_TRACE(JVMTI_EVENT_FRAME_POP, ("JVMTI [%s] Evt Frame Pop sent %s.%s",
1336 JvmtiTrace::safe_get_thread_name(thread),
1337 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1338 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1339
1340 // we also need to issue a frame pop event for this frame
1341 JvmtiEnv *env = ets->get_env();
1342 JvmtiMethodEventMark jem(thread, mh);
1343 JvmtiJavaThreadEventTransition jet(thread);
1344 jvmtiEventFramePop callback = env->callbacks()->FramePop;
1345 if (callback != NULL) {
1346 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1347 jem.jni_methodID(), exception_exit);
1348 }
1349 }
1350 // remove the frame's entry
1351 ets->clear_frame_pop(cur_frame_number);
1352 }
1353 }
1354 }
1355
1356 state->decr_cur_stack_depth();
1357 }
1358
1359
1360 // Todo: inline this for optimization
1361 void JvmtiExport::post_single_step(JavaThread *thread, Method* method, address location) {
1362 HandleMark hm(thread);
1363 methodHandle mh(thread, method);
1364
1365 JvmtiThreadState *state = thread->jvmti_thread_state();
1366 if (state == NULL) {
1367 return;
1368 }
1369 JvmtiEnvThreadStateIterator it(state);
1370 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1371 ets->compare_and_set_current_location(mh(), location, JVMTI_EVENT_SINGLE_STEP);
1372 if (!ets->single_stepping_posted() && ets->is_enabled(JVMTI_EVENT_SINGLE_STEP)) {
1373 EVT_TRACE(JVMTI_EVENT_SINGLE_STEP, ("JVMTI [%s] Evt Single Step sent %s.%s @ " INTX_FORMAT,
1374 JvmtiTrace::safe_get_thread_name(thread),
1375 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1376 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1377 location - mh()->code_base() ));
1378
1379 JvmtiEnv *env = ets->get_env();
1380 JvmtiLocationEventMark jem(thread, mh, location);
1381 JvmtiJavaThreadEventTransition jet(thread);
1382 jvmtiEventSingleStep callback = env->callbacks()->SingleStep;
1383 if (callback != NULL) {
1384 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1385 jem.jni_methodID(), jem.location());
1386 }
1387
1388 ets->set_single_stepping_posted();
1389 }
1390 }
1391 }
1392
1393
1394 void JvmtiExport::post_exception_throw(JavaThread *thread, Method* method, address location, oop exception) {
1395 HandleMark hm(thread);
1396 methodHandle mh(thread, method);
1397 Handle exception_handle(thread, exception);
1398
1399 JvmtiThreadState *state = thread->jvmti_thread_state();
1400 if (state == NULL) {
1401 return;
1402 }
1403
1404 EVT_TRIG_TRACE(JVMTI_EVENT_EXCEPTION, ("JVMTI [%s] Trg Exception thrown triggered",
1405 JvmtiTrace::safe_get_thread_name(thread)));
1406 if (!state->is_exception_detected()) {
1407 state->set_exception_detected();
1408 JvmtiEnvThreadStateIterator it(state);
1409 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1410 if (ets->is_enabled(JVMTI_EVENT_EXCEPTION) && (exception != NULL)) {
1411
1412 EVT_TRACE(JVMTI_EVENT_EXCEPTION,
1413 ("JVMTI [%s] Evt Exception thrown sent %s.%s @ " INTX_FORMAT,
1414 JvmtiTrace::safe_get_thread_name(thread),
1415 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1416 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1417 location - mh()->code_base() ));
1418
1419 JvmtiEnv *env = ets->get_env();
1420 JvmtiExceptionEventMark jem(thread, mh, location, exception_handle);
1421
1422 // It's okay to clear these exceptions here because we duplicate
1423 // this lookup in InterpreterRuntime::exception_handler_for_exception.
1424 EXCEPTION_MARK;
1425
1426 bool should_repeat;
1427 vframeStream st(thread);
1428 assert(!st.at_end(), "cannot be at end");
1429 Method* current_method = NULL;
1430 // A GC may occur during the Method::fast_exception_handler_bci_for()
1431 // call below if it needs to load the constraint class. Using a
1432 // methodHandle to keep the 'current_method' from being deallocated
1433 // if GC happens.
1434 methodHandle current_mh = methodHandle(thread, current_method);
1435 int current_bci = -1;
1436 do {
1437 current_method = st.method();
1438 current_mh = methodHandle(thread, current_method);
1439 current_bci = st.bci();
1440 do {
1441 should_repeat = false;
1442 KlassHandle eh_klass(thread, exception_handle()->klass());
1443 current_bci = Method::fast_exception_handler_bci_for(
1444 current_mh, eh_klass, current_bci, THREAD);
1445 if (HAS_PENDING_EXCEPTION) {
1446 exception_handle = Handle(thread, PENDING_EXCEPTION);
1447 CLEAR_PENDING_EXCEPTION;
1448 should_repeat = true;
1449 }
1450 } while (should_repeat && (current_bci != -1));
1451 st.next();
1452 } while ((current_bci < 0) && (!st.at_end()));
1453
1454 jmethodID catch_jmethodID;
1455 if (current_bci < 0) {
1456 catch_jmethodID = 0;
1457 current_bci = 0;
1458 } else {
1459 catch_jmethodID = jem.to_jmethodID(current_mh);
1460 }
1461
1462 JvmtiJavaThreadEventTransition jet(thread);
1463 jvmtiEventException callback = env->callbacks()->Exception;
1464 if (callback != NULL) {
1465 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1466 jem.jni_methodID(), jem.location(),
1467 jem.exception(),
1468 catch_jmethodID, current_bci);
1469 }
1470 }
1471 }
1472 }
1473
1474 // frames may get popped because of this throw, be safe - invalidate cached depth
1475 state->invalidate_cur_stack_depth();
1476 }
1477
1478
1479 void JvmtiExport::notice_unwind_due_to_exception(JavaThread *thread, Method* method, address location, oop exception, bool in_handler_frame) {
1480 HandleMark hm(thread);
1481 methodHandle mh(thread, method);
1482 Handle exception_handle(thread, exception);
1483
1484 JvmtiThreadState *state = thread->jvmti_thread_state();
1485 if (state == NULL) {
1486 return;
1487 }
1488 EVT_TRIG_TRACE(JVMTI_EVENT_EXCEPTION_CATCH,
1489 ("JVMTI [%s] Trg unwind_due_to_exception triggered %s.%s @ %s" INTX_FORMAT " - %s",
1490 JvmtiTrace::safe_get_thread_name(thread),
1491 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1492 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1493 location==0? "no location:" : "",
1494 location==0? 0 : location - mh()->code_base(),
1495 in_handler_frame? "in handler frame" : "not handler frame" ));
1496
1497 if (state->is_exception_detected()) {
1498
1499 state->invalidate_cur_stack_depth();
1500 if (!in_handler_frame) {
1501 // Not in exception handler.
1502 if(state->is_interp_only_mode()) {
1503 // method exit and frame pop events are posted only in interp mode.
1504 // When these events are enabled code should be in running in interp mode.
1505 JvmtiExport::post_method_exit(thread, method, thread->last_frame());
1506 // The cached cur_stack_depth might have changed from the
1507 // operations of frame pop or method exit. We are not 100% sure
1508 // the cached cur_stack_depth is still valid depth so invalidate
1509 // it.
1510 state->invalidate_cur_stack_depth();
1511 }
1512 } else {
1513 // In exception handler frame. Report exception catch.
1514 assert(location != NULL, "must be a known location");
1515 // Update cur_stack_depth - the frames above the current frame
1516 // have been unwound due to this exception:
1517 assert(!state->is_exception_caught(), "exception must not be caught yet.");
1518 state->set_exception_caught();
1519
1520 JvmtiEnvThreadStateIterator it(state);
1521 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1522 if (ets->is_enabled(JVMTI_EVENT_EXCEPTION_CATCH) && (exception_handle() != NULL)) {
1523 EVT_TRACE(JVMTI_EVENT_EXCEPTION_CATCH,
1524 ("JVMTI [%s] Evt ExceptionCatch sent %s.%s @ " INTX_FORMAT,
1525 JvmtiTrace::safe_get_thread_name(thread),
1526 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1527 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1528 location - mh()->code_base() ));
1529
1530 JvmtiEnv *env = ets->get_env();
1531 JvmtiExceptionEventMark jem(thread, mh, location, exception_handle);
1532 JvmtiJavaThreadEventTransition jet(thread);
1533 jvmtiEventExceptionCatch callback = env->callbacks()->ExceptionCatch;
1534 if (callback != NULL) {
1535 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1536 jem.jni_methodID(), jem.location(),
1537 jem.exception());
1538 }
1539 }
1540 }
1541 }
1542 }
1543 }
1544
1545 oop JvmtiExport::jni_GetField_probe(JavaThread *thread, jobject jobj, oop obj,
1546 Klass* klass, jfieldID fieldID, bool is_static) {
1547 if (*((int *)get_field_access_count_addr()) > 0 && thread->has_last_Java_frame()) {
1548 // At least one field access watch is set so we have more work
1549 // to do. This wrapper is used by entry points that allow us
1550 // to create handles in post_field_access_by_jni().
1551 post_field_access_by_jni(thread, obj, klass, fieldID, is_static);
1552 // event posting can block so refetch oop if we were passed a jobj
1553 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj);
1554 }
1555 return obj;
1556 }
1557
1558 oop JvmtiExport::jni_GetField_probe_nh(JavaThread *thread, jobject jobj, oop obj,
1559 Klass* klass, jfieldID fieldID, bool is_static) {
1560 if (*((int *)get_field_access_count_addr()) > 0 && thread->has_last_Java_frame()) {
1561 // At least one field access watch is set so we have more work
1562 // to do. This wrapper is used by "quick" entry points that don't
1563 // allow us to create handles in post_field_access_by_jni(). We
1564 // override that with a ResetNoHandleMark.
1565 ResetNoHandleMark rnhm;
1566 post_field_access_by_jni(thread, obj, klass, fieldID, is_static);
1567 // event posting can block so refetch oop if we were passed a jobj
1568 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj);
1569 }
1570 return obj;
1571 }
1572
1573 void JvmtiExport::post_field_access_by_jni(JavaThread *thread, oop obj,
1574 Klass* klass, jfieldID fieldID, bool is_static) {
1575 // We must be called with a Java context in order to provide reasonable
1576 // values for the klazz, method, and location fields. The callers of this
1577 // function don't make the call unless there is a Java context.
1578 assert(thread->has_last_Java_frame(), "must be called with a Java context");
1579
1580 ResourceMark rm;
1581 fieldDescriptor fd;
1582 // if get_field_descriptor finds fieldID to be invalid, then we just bail
1583 bool valid_fieldID = JvmtiEnv::get_field_descriptor(klass, fieldID, &fd);
1584 assert(valid_fieldID == true,"post_field_access_by_jni called with invalid fieldID");
1585 if (!valid_fieldID) return;
1586 // field accesses are not watched so bail
1587 if (!fd.is_field_access_watched()) return;
1588
1589 HandleMark hm(thread);
1590 KlassHandle h_klass(thread, klass);
1591 Handle h_obj;
1592 if (!is_static) {
1593 // non-static field accessors have an object, but we need a handle
1594 assert(obj != NULL, "non-static needs an object");
1595 h_obj = Handle(thread, obj);
1596 }
1597 post_field_access(thread,
1598 thread->last_frame().interpreter_frame_method(),
1599 thread->last_frame().interpreter_frame_bcp(),
1600 h_klass, h_obj, fieldID);
1601 }
1602
1603 void JvmtiExport::post_field_access(JavaThread *thread, Method* method,
1604 address location, KlassHandle field_klass, Handle object, jfieldID field) {
1605
1606 HandleMark hm(thread);
1607 methodHandle mh(thread, method);
1608
1609 JvmtiThreadState *state = thread->jvmti_thread_state();
1610 if (state == NULL) {
1611 return;
1612 }
1613 EVT_TRIG_TRACE(JVMTI_EVENT_FIELD_ACCESS, ("JVMTI [%s] Trg Field Access event triggered",
1614 JvmtiTrace::safe_get_thread_name(thread)));
1615 JvmtiEnvThreadStateIterator it(state);
1616 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1617 if (ets->is_enabled(JVMTI_EVENT_FIELD_ACCESS)) {
1618 EVT_TRACE(JVMTI_EVENT_FIELD_ACCESS, ("JVMTI [%s] Evt Field Access event sent %s.%s @ " INTX_FORMAT,
1619 JvmtiTrace::safe_get_thread_name(thread),
1620 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1621 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1622 location - mh()->code_base() ));
1623
1624 JvmtiEnv *env = ets->get_env();
1625 JvmtiLocationEventMark jem(thread, mh, location);
1626 jclass field_jclass = jem.to_jclass(field_klass());
1627 jobject field_jobject = jem.to_jobject(object());
1628 JvmtiJavaThreadEventTransition jet(thread);
1629 jvmtiEventFieldAccess callback = env->callbacks()->FieldAccess;
1630 if (callback != NULL) {
1631 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1632 jem.jni_methodID(), jem.location(),
1633 field_jclass, field_jobject, field);
1634 }
1635 }
1636 }
1637 }
1638
1639 oop JvmtiExport::jni_SetField_probe(JavaThread *thread, jobject jobj, oop obj,
1640 Klass* klass, jfieldID fieldID, bool is_static,
1641 char sig_type, jvalue *value) {
1642 if (*((int *)get_field_modification_count_addr()) > 0 && thread->has_last_Java_frame()) {
1643 // At least one field modification watch is set so we have more work
1644 // to do. This wrapper is used by entry points that allow us
1645 // to create handles in post_field_modification_by_jni().
1646 post_field_modification_by_jni(thread, obj, klass, fieldID, is_static, sig_type, value);
1647 // event posting can block so refetch oop if we were passed a jobj
1648 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj);
1649 }
1650 return obj;
1651 }
1652
1653 oop JvmtiExport::jni_SetField_probe_nh(JavaThread *thread, jobject jobj, oop obj,
1654 Klass* klass, jfieldID fieldID, bool is_static,
1655 char sig_type, jvalue *value) {
1656 if (*((int *)get_field_modification_count_addr()) > 0 && thread->has_last_Java_frame()) {
1657 // At least one field modification watch is set so we have more work
1658 // to do. This wrapper is used by "quick" entry points that don't
1659 // allow us to create handles in post_field_modification_by_jni(). We
1660 // override that with a ResetNoHandleMark.
1661 ResetNoHandleMark rnhm;
1662 post_field_modification_by_jni(thread, obj, klass, fieldID, is_static, sig_type, value);
1663 // event posting can block so refetch oop if we were passed a jobj
1664 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj);
1665 }
1666 return obj;
1667 }
1668
1669 void JvmtiExport::post_field_modification_by_jni(JavaThread *thread, oop obj,
1670 Klass* klass, jfieldID fieldID, bool is_static,
1671 char sig_type, jvalue *value) {
1672 // We must be called with a Java context in order to provide reasonable
1673 // values for the klazz, method, and location fields. The callers of this
1674 // function don't make the call unless there is a Java context.
1675 assert(thread->has_last_Java_frame(), "must be called with Java context");
1676
1677 ResourceMark rm;
1678 fieldDescriptor fd;
1679 // if get_field_descriptor finds fieldID to be invalid, then we just bail
1680 bool valid_fieldID = JvmtiEnv::get_field_descriptor(klass, fieldID, &fd);
1681 assert(valid_fieldID == true,"post_field_modification_by_jni called with invalid fieldID");
1682 if (!valid_fieldID) return;
1683 // field modifications are not watched so bail
1684 if (!fd.is_field_modification_watched()) return;
1685
1686 HandleMark hm(thread);
1687
1688 Handle h_obj;
1689 if (!is_static) {
1690 // non-static field accessors have an object, but we need a handle
1691 assert(obj != NULL, "non-static needs an object");
1692 h_obj = Handle(thread, obj);
1693 }
1694 KlassHandle h_klass(thread, klass);
1695 post_field_modification(thread,
1696 thread->last_frame().interpreter_frame_method(),
1697 thread->last_frame().interpreter_frame_bcp(),
1698 h_klass, h_obj, fieldID, sig_type, value);
1699 }
1700
1701 void JvmtiExport::post_raw_field_modification(JavaThread *thread, Method* method,
1702 address location, KlassHandle field_klass, Handle object, jfieldID field,
1703 char sig_type, jvalue *value) {
1704
1705 if (sig_type == 'I' || sig_type == 'Z' || sig_type == 'C' || sig_type == 'S') {
1706 // 'I' instructions are used for byte, char, short and int.
1707 // determine which it really is, and convert
1708 fieldDescriptor fd;
1709 bool found = JvmtiEnv::get_field_descriptor(field_klass(), field, &fd);
1710 // should be found (if not, leave as is)
1711 if (found) {
1712 jint ival = value->i;
1713 // convert value from int to appropriate type
1714 switch (fd.field_type()) {
1715 case T_BOOLEAN:
1716 sig_type = 'Z';
1717 value->i = 0; // clear it
1718 value->z = (jboolean)ival;
1719 break;
1720 case T_BYTE:
1721 sig_type = 'B';
1722 value->i = 0; // clear it
1723 value->b = (jbyte)ival;
1724 break;
1725 case T_CHAR:
1726 sig_type = 'C';
1727 value->i = 0; // clear it
1728 value->c = (jchar)ival;
1729 break;
1730 case T_SHORT:
1731 sig_type = 'S';
1732 value->i = 0; // clear it
1733 value->s = (jshort)ival;
1734 break;
1735 case T_INT:
1736 // nothing to do
1737 break;
1738 default:
1739 // this is an integer instruction, should be one of above
1740 ShouldNotReachHere();
1741 break;
1742 }
1743 }
1744 }
1745
1746 assert(sig_type != '[', "array should have sig_type == 'L'");
1747 bool handle_created = false;
1748
1749 // convert oop to JNI handle.
1750 if (sig_type == 'L') {
1751 handle_created = true;
1752 value->l = (jobject)JNIHandles::make_local(thread, (oop)value->l);
1753 }
1754
1755 post_field_modification(thread, method, location, field_klass, object, field, sig_type, value);
1756
1757 // Destroy the JNI handle allocated above.
1758 if (handle_created) {
1759 JNIHandles::destroy_local(value->l);
1760 }
1761 }
1762
1763 void JvmtiExport::post_field_modification(JavaThread *thread, Method* method,
1764 address location, KlassHandle field_klass, Handle object, jfieldID field,
1765 char sig_type, jvalue *value_ptr) {
1766
1767 HandleMark hm(thread);
1768 methodHandle mh(thread, method);
1769
1770 JvmtiThreadState *state = thread->jvmti_thread_state();
1771 if (state == NULL) {
1772 return;
1773 }
1774 EVT_TRIG_TRACE(JVMTI_EVENT_FIELD_MODIFICATION,
1775 ("JVMTI [%s] Trg Field Modification event triggered",
1776 JvmtiTrace::safe_get_thread_name(thread)));
1777
1778 JvmtiEnvThreadStateIterator it(state);
1779 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1780 if (ets->is_enabled(JVMTI_EVENT_FIELD_MODIFICATION)) {
1781 EVT_TRACE(JVMTI_EVENT_FIELD_MODIFICATION,
1782 ("JVMTI [%s] Evt Field Modification event sent %s.%s @ " INTX_FORMAT,
1783 JvmtiTrace::safe_get_thread_name(thread),
1784 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1785 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1786 location - mh()->code_base() ));
1787
1788 JvmtiEnv *env = ets->get_env();
1789 JvmtiLocationEventMark jem(thread, mh, location);
1790 jclass field_jclass = jem.to_jclass(field_klass());
1791 jobject field_jobject = jem.to_jobject(object());
1792 JvmtiJavaThreadEventTransition jet(thread);
1793 jvmtiEventFieldModification callback = env->callbacks()->FieldModification;
1794 if (callback != NULL) {
1795 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1796 jem.jni_methodID(), jem.location(),
1797 field_jclass, field_jobject, field, sig_type, *value_ptr);
1798 }
1799 }
1800 }
1801 }
1802
1803 void JvmtiExport::post_native_method_bind(Method* method, address* function_ptr) {
1804 JavaThread* thread = JavaThread::current();
1805 assert(thread->thread_state() == _thread_in_vm, "must be in vm state");
1806
1807 HandleMark hm(thread);
1808 methodHandle mh(thread, method);
1809
1810 EVT_TRIG_TRACE(JVMTI_EVENT_NATIVE_METHOD_BIND, ("JVMTI [%s] Trg Native Method Bind event triggered",
1811 JvmtiTrace::safe_get_thread_name(thread)));
1812
1813 if (JvmtiEventController::is_enabled(JVMTI_EVENT_NATIVE_METHOD_BIND)) {
1814 JvmtiEnvIterator it;
1815 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1816 if (env->is_enabled(JVMTI_EVENT_NATIVE_METHOD_BIND)) {
1817 EVT_TRACE(JVMTI_EVENT_NATIVE_METHOD_BIND, ("JVMTI [%s] Evt Native Method Bind event sent",
1818 JvmtiTrace::safe_get_thread_name(thread) ));
1819
1820 JvmtiMethodEventMark jem(thread, mh);
1821 JvmtiJavaThreadEventTransition jet(thread);
1822 JNIEnv* jni_env = (env->phase() == JVMTI_PHASE_PRIMORDIAL) ? NULL : jem.jni_env();
1823 jvmtiEventNativeMethodBind callback = env->callbacks()->NativeMethodBind;
1824 if (callback != NULL) {
1825 (*callback)(env->jvmti_external(), jni_env, jem.jni_thread(),
1826 jem.jni_methodID(), (void*)(*function_ptr), (void**)function_ptr);
1827 }
1828 }
1829 }
1830 }
1831 }
1832
1833 // Returns a record containing inlining information for the given nmethod
1834 jvmtiCompiledMethodLoadInlineRecord* create_inline_record(nmethod* nm) {
1835 jint numstackframes = 0;
1836 jvmtiCompiledMethodLoadInlineRecord* record = (jvmtiCompiledMethodLoadInlineRecord*)NEW_RESOURCE_OBJ(jvmtiCompiledMethodLoadInlineRecord);
1837 record->header.kind = JVMTI_CMLR_INLINE_INFO;
1838 record->header.next = NULL;
1839 record->header.majorinfoversion = JVMTI_CMLR_MAJOR_VERSION_1;
1840 record->header.minorinfoversion = JVMTI_CMLR_MINOR_VERSION_0;
1841 record->numpcs = 0;
1842 for(PcDesc* p = nm->scopes_pcs_begin(); p < nm->scopes_pcs_end(); p++) {
1843 if(p->scope_decode_offset() == DebugInformationRecorder::serialized_null) continue;
1844 record->numpcs++;
1845 }
1846 record->pcinfo = (PCStackInfo*)(NEW_RESOURCE_ARRAY(PCStackInfo, record->numpcs));
1847 int scope = 0;
1848 for(PcDesc* p = nm->scopes_pcs_begin(); p < nm->scopes_pcs_end(); p++) {
1849 if(p->scope_decode_offset() == DebugInformationRecorder::serialized_null) continue;
1850 void* pc_address = (void*)p->real_pc(nm);
1851 assert(pc_address != NULL, "pc_address must be non-null");
1852 record->pcinfo[scope].pc = pc_address;
1853 numstackframes=0;
1854 for(ScopeDesc* sd = nm->scope_desc_at(p->real_pc(nm));sd != NULL;sd = sd->sender()) {
1855 numstackframes++;
1856 }
1857 assert(numstackframes != 0, "numstackframes must be nonzero.");
1858 record->pcinfo[scope].methods = (jmethodID *)NEW_RESOURCE_ARRAY(jmethodID, numstackframes);
1859 record->pcinfo[scope].bcis = (jint *)NEW_RESOURCE_ARRAY(jint, numstackframes);
1860 record->pcinfo[scope].numstackframes = numstackframes;
1861 int stackframe = 0;
1862 for(ScopeDesc* sd = nm->scope_desc_at(p->real_pc(nm));sd != NULL;sd = sd->sender()) {
1863 // 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()
1864 assert(sd->method() != NULL, "sd->method() cannot be null.");
1865 record->pcinfo[scope].methods[stackframe] = sd->method()->jmethod_id();
1866 record->pcinfo[scope].bcis[stackframe] = sd->bci();
1867 stackframe++;
1868 }
1869 scope++;
1870 }
1871 return record;
1872 }
1873
1874 void JvmtiExport::post_compiled_method_load(nmethod *nm) {
1875 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) {
1876 return;
1877 }
1878 JavaThread* thread = JavaThread::current();
1879
1880 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
1881 ("JVMTI [%s] method compile load event triggered",
1882 JvmtiTrace::safe_get_thread_name(thread)));
1883
1884 JvmtiEnvIterator it;
1885 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1886 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_LOAD)) {
1887 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) {
1888 continue;
1889 }
1890 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
1891 ("JVMTI [%s] class compile method load event sent %s.%s ",
1892 JvmtiTrace::safe_get_thread_name(thread),
1893 (nm->method() == NULL) ? "NULL" : nm->method()->klass_name()->as_C_string(),
1894 (nm->method() == NULL) ? "NULL" : nm->method()->name()->as_C_string()));
1895 ResourceMark rm(thread);
1896 HandleMark hm(thread);
1897
1898 // Add inlining information
1899 jvmtiCompiledMethodLoadInlineRecord* inlinerecord = create_inline_record(nm);
1900 // Pass inlining information through the void pointer
1901 JvmtiCompiledMethodLoadEventMark jem(thread, nm, inlinerecord);
1902 JvmtiJavaThreadEventTransition jet(thread);
1903 jvmtiEventCompiledMethodLoad callback = env->callbacks()->CompiledMethodLoad;
1904 if (callback != NULL) {
1905 (*callback)(env->jvmti_external(), jem.jni_methodID(),
1906 jem.code_size(), jem.code_data(), jem.map_length(),
1907 jem.map(), jem.compile_info());
1908 }
1909 }
1910 }
1911 }
1912
1913
1914 // post a COMPILED_METHOD_LOAD event for a given environment
1915 void JvmtiExport::post_compiled_method_load(JvmtiEnv* env, const jmethodID method, const jint length,
1916 const void *code_begin, const jint map_length,
1917 const jvmtiAddrLocationMap* map)
1918 {
1919 if (env->phase() <= JVMTI_PHASE_PRIMORDIAL) {
1920 return;
1921 }
1922 JavaThread* thread = JavaThread::current();
1923 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
1924 ("JVMTI [%s] method compile load event triggered (by GenerateEvents)",
1925 JvmtiTrace::safe_get_thread_name(thread)));
1926 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_LOAD)) {
1927
1928 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
1929 ("JVMTI [%s] class compile method load event sent (by GenerateEvents), jmethodID=" PTR_FORMAT,
1930 JvmtiTrace::safe_get_thread_name(thread), p2i(method)));
1931
1932 JvmtiEventMark jem(thread);
1933 JvmtiJavaThreadEventTransition jet(thread);
1934 jvmtiEventCompiledMethodLoad callback = env->callbacks()->CompiledMethodLoad;
1935 if (callback != NULL) {
1936 (*callback)(env->jvmti_external(), method,
1937 length, code_begin, map_length,
1938 map, NULL);
1939 }
1940 }
1941 }
1942
1943 void JvmtiExport::post_dynamic_code_generated_internal(const char *name, const void *code_begin, const void *code_end) {
1944 assert(name != NULL && name[0] != '\0', "sanity check");
1945
1946 JavaThread* thread = JavaThread::current();
1947 // In theory everyone coming thru here is in_vm but we need to be certain
1948 // because a callee will do a vm->native transition
1949 ThreadInVMfromUnknown __tiv;
1950
1951 EVT_TRIG_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED,
1952 ("JVMTI [%s] method dynamic code generated event triggered",
1953 JvmtiTrace::safe_get_thread_name(thread)));
1954 JvmtiEnvIterator it;
1955 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1956 if (env->is_enabled(JVMTI_EVENT_DYNAMIC_CODE_GENERATED)) {
1957 EVT_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED,
1958 ("JVMTI [%s] dynamic code generated event sent for %s",
1959 JvmtiTrace::safe_get_thread_name(thread), name));
1960 JvmtiEventMark jem(thread);
1961 JvmtiJavaThreadEventTransition jet(thread);
1962 jint length = (jint)pointer_delta(code_end, code_begin, sizeof(char));
1963 jvmtiEventDynamicCodeGenerated callback = env->callbacks()->DynamicCodeGenerated;
1964 if (callback != NULL) {
1965 (*callback)(env->jvmti_external(), name, (void*)code_begin, length);
1966 }
1967 }
1968 }
1969 }
1970
1971 void JvmtiExport::post_dynamic_code_generated(const char *name, const void *code_begin, const void *code_end) {
1972 jvmtiPhase phase = JvmtiEnv::get_phase();
1973 if (phase == JVMTI_PHASE_PRIMORDIAL || phase == JVMTI_PHASE_START) {
1974 post_dynamic_code_generated_internal(name, code_begin, code_end);
1975 } else {
1976 // It may not be safe to post the event from this thread. Defer all
1977 // postings to the service thread so that it can perform them in a safe
1978 // context and in-order.
1979 MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag);
1980 JvmtiDeferredEvent event = JvmtiDeferredEvent::dynamic_code_generated_event(
1981 name, code_begin, code_end);
1982 JvmtiDeferredEventQueue::enqueue(event);
1983 }
1984 }
1985
1986
1987 // post a DYNAMIC_CODE_GENERATED event for a given environment
1988 // used by GenerateEvents
1989 void JvmtiExport::post_dynamic_code_generated(JvmtiEnv* env, const char *name,
1990 const void *code_begin, const void *code_end)
1991 {
1992 JavaThread* thread = JavaThread::current();
1993 EVT_TRIG_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED,
1994 ("JVMTI [%s] dynamic code generated event triggered (by GenerateEvents)",
1995 JvmtiTrace::safe_get_thread_name(thread)));
1996 if (env->is_enabled(JVMTI_EVENT_DYNAMIC_CODE_GENERATED)) {
1997 EVT_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED,
1998 ("JVMTI [%s] dynamic code generated event sent for %s",
1999 JvmtiTrace::safe_get_thread_name(thread), name));
2000 JvmtiEventMark jem(thread);
2001 JvmtiJavaThreadEventTransition jet(thread);
2002 jint length = (jint)pointer_delta(code_end, code_begin, sizeof(char));
2003 jvmtiEventDynamicCodeGenerated callback = env->callbacks()->DynamicCodeGenerated;
2004 if (callback != NULL) {
2005 (*callback)(env->jvmti_external(), name, (void*)code_begin, length);
2006 }
2007 }
2008 }
2009
2010 // post a DynamicCodeGenerated event while holding locks in the VM.
2011 void JvmtiExport::post_dynamic_code_generated_while_holding_locks(const char* name,
2012 address code_begin, address code_end)
2013 {
2014 // register the stub with the current dynamic code event collector
2015 JvmtiThreadState* state = JvmtiThreadState::state_for(JavaThread::current());
2016 // state can only be NULL if the current thread is exiting which
2017 // should not happen since we're trying to post an event
2018 guarantee(state != NULL, "attempt to register stub via an exiting thread");
2019 JvmtiDynamicCodeEventCollector* collector = state->get_dynamic_code_event_collector();
2020 guarantee(collector != NULL, "attempt to register stub without event collector");
2021 collector->register_stub(name, code_begin, code_end);
2022 }
2023
2024 // Collect all the vm internally allocated objects which are visible to java world
2025 void JvmtiExport::record_vm_internal_object_allocation(oop obj) {
2026 Thread* thread = Thread::current_or_null();
2027 if (thread != NULL && thread->is_Java_thread()) {
2028 // Can not take safepoint here.
2029 NoSafepointVerifier no_sfpt;
2030 // Can not take safepoint here so can not use state_for to get
2031 // jvmti thread state.
2032 JvmtiThreadState *state = ((JavaThread*)thread)->jvmti_thread_state();
2033 if (state != NULL ) {
2034 // state is non NULL when VMObjectAllocEventCollector is enabled.
2035 JvmtiVMObjectAllocEventCollector *collector;
2036 collector = state->get_vm_object_alloc_event_collector();
2037 if (collector != NULL && collector->is_enabled()) {
2038 // Don't record classes as these will be notified via the ClassLoad
2039 // event.
2040 if (obj->klass() != SystemDictionary::Class_klass()) {
2041 collector->record_allocation(obj);
2042 }
2043 }
2044 }
2045 }
2046 }
2047
2048 void JvmtiExport::post_garbage_collection_finish() {
2049 Thread *thread = Thread::current(); // this event is posted from VM-Thread.
2050 EVT_TRIG_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH,
2051 ("JVMTI [%s] garbage collection finish event triggered",
2052 JvmtiTrace::safe_get_thread_name(thread)));
2053 JvmtiEnvIterator it;
2054 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
2055 if (env->is_enabled(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH)) {
2056 EVT_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH,
2057 ("JVMTI [%s] garbage collection finish event sent ",
2058 JvmtiTrace::safe_get_thread_name(thread)));
2059 JvmtiThreadEventTransition jet(thread);
2060 // JNIEnv is NULL here because this event is posted from VM Thread
2061 jvmtiEventGarbageCollectionFinish callback = env->callbacks()->GarbageCollectionFinish;
2062 if (callback != NULL) {
2063 (*callback)(env->jvmti_external());
2064 }
2065 }
2066 }
2067 }
2068
2069 void JvmtiExport::post_garbage_collection_start() {
2070 Thread* thread = Thread::current(); // this event is posted from vm-thread.
2071 EVT_TRIG_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_START,
2072 ("JVMTI [%s] garbage collection start event triggered",
2073 JvmtiTrace::safe_get_thread_name(thread)));
2074 JvmtiEnvIterator it;
2075 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
2076 if (env->is_enabled(JVMTI_EVENT_GARBAGE_COLLECTION_START)) {
2077 EVT_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_START,
2078 ("JVMTI [%s] garbage collection start event sent ",
2079 JvmtiTrace::safe_get_thread_name(thread)));
2080 JvmtiThreadEventTransition jet(thread);
2081 // JNIEnv is NULL here because this event is posted from VM Thread
2082 jvmtiEventGarbageCollectionStart callback = env->callbacks()->GarbageCollectionStart;
2083 if (callback != NULL) {
2084 (*callback)(env->jvmti_external());
2085 }
2086 }
2087 }
2088 }
2089
2090 void JvmtiExport::post_data_dump() {
2091 Thread *thread = Thread::current();
2092 EVT_TRIG_TRACE(JVMTI_EVENT_DATA_DUMP_REQUEST,
2093 ("JVMTI [%s] data dump request event triggered",
2094 JvmtiTrace::safe_get_thread_name(thread)));
2095 JvmtiEnvIterator it;
2096 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
2097 if (env->is_enabled(JVMTI_EVENT_DATA_DUMP_REQUEST)) {
2098 EVT_TRACE(JVMTI_EVENT_DATA_DUMP_REQUEST,
2099 ("JVMTI [%s] data dump request event sent ",
2100 JvmtiTrace::safe_get_thread_name(thread)));
2101 JvmtiThreadEventTransition jet(thread);
2102 // JNIEnv is NULL here because this event is posted from VM Thread
2103 jvmtiEventDataDumpRequest callback = env->callbacks()->DataDumpRequest;
2104 if (callback != NULL) {
2105 (*callback)(env->jvmti_external());
2106 }
2107 }
2108 }
2109 }
2110
2111 void JvmtiExport::post_monitor_contended_enter(JavaThread *thread, ObjectMonitor *obj_mntr) {
2112 oop object = (oop)obj_mntr->object();
2113 if (!ServiceUtil::visible_oop(object)) {
2114 // Ignore monitor contended enter for vm internal object.
2115 return;
2116 }
2117 JvmtiThreadState *state = thread->jvmti_thread_state();
2118 if (state == NULL) {
2119 return;
2120 }
2121
2122 HandleMark hm(thread);
2123 Handle h(thread, object);
2124
2125 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTER,
2126 ("JVMTI [%s] montior contended enter event triggered",
2127 JvmtiTrace::safe_get_thread_name(thread)));
2128
2129 JvmtiEnvThreadStateIterator it(state);
2130 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
2131 if (ets->is_enabled(JVMTI_EVENT_MONITOR_CONTENDED_ENTER)) {
2132 EVT_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTER,
2133 ("JVMTI [%s] monitor contended enter event sent",
2134 JvmtiTrace::safe_get_thread_name(thread)));
2135 JvmtiMonitorEventMark jem(thread, h());
2136 JvmtiEnv *env = ets->get_env();
2137 JvmtiThreadEventTransition jet(thread);
2138 jvmtiEventMonitorContendedEnter callback = env->callbacks()->MonitorContendedEnter;
2139 if (callback != NULL) {
2140 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_object());
2141 }
2142 }
2143 }
2144 }
2145
2146 void JvmtiExport::post_monitor_contended_entered(JavaThread *thread, ObjectMonitor *obj_mntr) {
2147 oop object = (oop)obj_mntr->object();
2148 if (!ServiceUtil::visible_oop(object)) {
2149 // Ignore monitor contended entered for vm internal object.
2150 return;
2151 }
2152 JvmtiThreadState *state = thread->jvmti_thread_state();
2153 if (state == NULL) {
2154 return;
2155 }
2156
2157 HandleMark hm(thread);
2158 Handle h(thread, object);
2159
2160 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED,
2161 ("JVMTI [%s] montior contended entered event triggered",
2162 JvmtiTrace::safe_get_thread_name(thread)));
2163
2164 JvmtiEnvThreadStateIterator it(state);
2165 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
2166 if (ets->is_enabled(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED)) {
2167 EVT_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED,
2168 ("JVMTI [%s] monitor contended enter event sent",
2169 JvmtiTrace::safe_get_thread_name(thread)));
2170 JvmtiMonitorEventMark jem(thread, h());
2171 JvmtiEnv *env = ets->get_env();
2172 JvmtiThreadEventTransition jet(thread);
2173 jvmtiEventMonitorContendedEntered callback = env->callbacks()->MonitorContendedEntered;
2174 if (callback != NULL) {
2175 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_object());
2176 }
2177 }
2178 }
2179 }
2180
2181 void JvmtiExport::post_monitor_wait(JavaThread *thread, oop object,
2182 jlong timeout) {
2183 JvmtiThreadState *state = thread->jvmti_thread_state();
2184 if (state == NULL) {
2185 return;
2186 }
2187
2188 HandleMark hm(thread);
2189 Handle h(thread, object);
2190
2191 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_WAIT,
2192 ("JVMTI [%s] montior wait event triggered",
2193 JvmtiTrace::safe_get_thread_name(thread)));
2194
2195 JvmtiEnvThreadStateIterator it(state);
2196 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
2197 if (ets->is_enabled(JVMTI_EVENT_MONITOR_WAIT)) {
2198 EVT_TRACE(JVMTI_EVENT_MONITOR_WAIT,
2199 ("JVMTI [%s] monitor wait event sent ",
2200 JvmtiTrace::safe_get_thread_name(thread)));
2201 JvmtiMonitorEventMark jem(thread, h());
2202 JvmtiEnv *env = ets->get_env();
2203 JvmtiThreadEventTransition jet(thread);
2204 jvmtiEventMonitorWait callback = env->callbacks()->MonitorWait;
2205 if (callback != NULL) {
2206 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
2207 jem.jni_object(), timeout);
2208 }
2209 }
2210 }
2211 }
2212
2213 void JvmtiExport::post_monitor_waited(JavaThread *thread, ObjectMonitor *obj_mntr, jboolean timed_out) {
2214 oop object = (oop)obj_mntr->object();
2215 if (!ServiceUtil::visible_oop(object)) {
2216 // Ignore monitor waited for vm internal object.
2217 return;
2218 }
2219 JvmtiThreadState *state = thread->jvmti_thread_state();
2220 if (state == NULL) {
2221 return;
2222 }
2223
2224 HandleMark hm(thread);
2225 Handle h(thread, object);
2226
2227 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_WAITED,
2228 ("JVMTI [%s] montior waited event triggered",
2229 JvmtiTrace::safe_get_thread_name(thread)));
2230
2231 JvmtiEnvThreadStateIterator it(state);
2232 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
2233 if (ets->is_enabled(JVMTI_EVENT_MONITOR_WAITED)) {
2234 EVT_TRACE(JVMTI_EVENT_MONITOR_WAITED,
2235 ("JVMTI [%s] monitor waited event sent ",
2236 JvmtiTrace::safe_get_thread_name(thread)));
2237 JvmtiMonitorEventMark jem(thread, h());
2238 JvmtiEnv *env = ets->get_env();
2239 JvmtiThreadEventTransition jet(thread);
2240 jvmtiEventMonitorWaited callback = env->callbacks()->MonitorWaited;
2241 if (callback != NULL) {
2242 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
2243 jem.jni_object(), timed_out);
2244 }
2245 }
2246 }
2247 }
2248
2249
2250 void JvmtiExport::post_vm_object_alloc(JavaThread *thread, oop object) {
2251 EVT_TRIG_TRACE(JVMTI_EVENT_VM_OBJECT_ALLOC, ("JVMTI [%s] Trg vm object alloc triggered",
2252 JvmtiTrace::safe_get_thread_name(thread)));
2253 if (object == NULL) {
2254 return;
2255 }
2256 HandleMark hm(thread);
2257 Handle h(thread, object);
2258 JvmtiEnvIterator it;
2259 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
2260 if (env->is_enabled(JVMTI_EVENT_VM_OBJECT_ALLOC)) {
2261 EVT_TRACE(JVMTI_EVENT_VM_OBJECT_ALLOC, ("JVMTI [%s] Evt vmobject alloc sent %s",
2262 JvmtiTrace::safe_get_thread_name(thread),
2263 object==NULL? "NULL" : java_lang_Class::as_Klass(object)->external_name()));
2264
2265 JvmtiVMObjectAllocEventMark jem(thread, h());
2266 JvmtiJavaThreadEventTransition jet(thread);
2267 jvmtiEventVMObjectAlloc callback = env->callbacks()->VMObjectAlloc;
2268 if (callback != NULL) {
2269 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
2270 jem.jni_jobject(), jem.jni_class(), jem.size());
2271 }
2272 }
2273 }
2274 }
2275
2276 ////////////////////////////////////////////////////////////////////////////////////////////////
2277
2278 void JvmtiExport::cleanup_thread(JavaThread* thread) {
2279 assert(JavaThread::current() == thread, "thread is not current");
2280 MutexLocker mu(JvmtiThreadState_lock);
2281
2282 if (thread->jvmti_thread_state() != NULL) {
2283 // This has to happen after the thread state is removed, which is
2284 // why it is not in post_thread_end_event like its complement
2285 // Maybe both these functions should be rolled into the posts?
2286 JvmtiEventController::thread_ended(thread);
2287 }
2288 }
2289
2290 void JvmtiExport::clear_detected_exception(JavaThread* thread) {
2291 assert(JavaThread::current() == thread, "thread is not current");
2292
2293 JvmtiThreadState* state = thread->jvmti_thread_state();
2294 if (state != NULL) {
2295 state->clear_exception_detected();
2296 }
2297 }
2298
2299 void JvmtiExport::oops_do(OopClosure* f) {
2300 JvmtiCurrentBreakpoints::oops_do(f);
2301 JvmtiVMObjectAllocEventCollector::oops_do_for_all_threads(f);
2302 }
2303
2304 void JvmtiExport::weak_oops_do(BoolObjectClosure* is_alive, OopClosure* f) {
2305 JvmtiTagMap::weak_oops_do(is_alive, f);
2306 }
2307
2308 void JvmtiExport::gc_epilogue() {
2309 JvmtiCurrentBreakpoints::gc_epilogue();
2310 }
2311
2312 // Onload raw monitor transition.
2313 void JvmtiExport::transition_pending_onload_raw_monitors() {
2314 JvmtiPendingMonitors::transition_raw_monitors();
2315 }
2316
2317 ////////////////////////////////////////////////////////////////////////////////////////////////
2318 #if INCLUDE_SERVICES
2319 // Attach is disabled if SERVICES is not included
2320
2321 // type for the Agent_OnAttach entry point
2322 extern "C" {
2323 typedef jint (JNICALL *OnAttachEntry_t)(JavaVM*, char *, void *);
2324 }
2325
2326 jint JvmtiExport::load_agent_library(AttachOperation* op, outputStream* st) {
2327 // get agent name and options
2328 const char* agent = op->arg(0);
2329 const char* absParam = op->arg(1);
2330 const char* options = op->arg(2);
2331
2332 return load_agent_library(agent, absParam, options, st);
2333 }
2334
2335 jint JvmtiExport::load_agent_library(const char *agent, const char *absParam,
2336 const char *options, outputStream* st) {
2337 char ebuf[1024];
2338 char buffer[JVM_MAXPATHLEN];
2339 void* library = NULL;
2340 jint result = JNI_ERR;
2341 const char *on_attach_symbols[] = AGENT_ONATTACH_SYMBOLS;
2342 size_t num_symbol_entries = ARRAY_SIZE(on_attach_symbols);
2343
2344 // The abs paramter should be "true" or "false"
2345 bool is_absolute_path = (absParam != NULL) && (strcmp(absParam,"true")==0);
2346
2347 // Initially marked as invalid. It will be set to valid if we can find the agent
2348 AgentLibrary *agent_lib = new AgentLibrary(agent, options, is_absolute_path, NULL);
2349
2350 // Check for statically linked in agent. If not found then if the path is
2351 // absolute we attempt to load the library. Otherwise we try to load it
2352 // from the standard dll directory.
2353
2354 if (!os::find_builtin_agent(agent_lib, on_attach_symbols, num_symbol_entries)) {
2355 if (is_absolute_path) {
2356 library = os::dll_load(agent, ebuf, sizeof ebuf);
2357 } else {
2358 // Try to load the agent from the standard dll directory
2359 if (os::dll_build_name(buffer, sizeof(buffer), Arguments::get_dll_dir(),
2360 agent)) {
2361 library = os::dll_load(buffer, ebuf, sizeof ebuf);
2362 }
2363 if (library == NULL) {
2364 // not found - try local path
2365 char ns[1] = {0};
2366 if (os::dll_build_name(buffer, sizeof(buffer), ns, agent)) {
2367 library = os::dll_load(buffer, ebuf, sizeof ebuf);
2368 }
2369 }
2370 }
2371 if (library != NULL) {
2372 agent_lib->set_os_lib(library);
2373 agent_lib->set_valid();
2374 }
2375 }
2376 // If the library was loaded then we attempt to invoke the Agent_OnAttach
2377 // function
2378 if (agent_lib->valid()) {
2379 // Lookup the Agent_OnAttach function
2380 OnAttachEntry_t on_attach_entry = NULL;
2381 on_attach_entry = CAST_TO_FN_PTR(OnAttachEntry_t,
2382 os::find_agent_function(agent_lib, false, on_attach_symbols, num_symbol_entries));
2383 if (on_attach_entry == NULL) {
2384 // Agent_OnAttach missing - unload library
2385 if (!agent_lib->is_static_lib()) {
2386 os::dll_unload(library);
2387 }
2388 delete agent_lib;
2389 } else {
2390 // Invoke the Agent_OnAttach function
2391 JavaThread* THREAD = JavaThread::current();
2392 {
2393 extern struct JavaVM_ main_vm;
2394 JvmtiThreadEventMark jem(THREAD);
2395 JvmtiJavaThreadEventTransition jet(THREAD);
2396
2397 result = (*on_attach_entry)(&main_vm, (char*)options, NULL);
2398 }
2399
2400 // Agent_OnAttach may have used JNI
2401 if (HAS_PENDING_EXCEPTION) {
2402 CLEAR_PENDING_EXCEPTION;
2403 }
2404
2405 // If OnAttach returns JNI_OK then we add it to the list of
2406 // agent libraries so that we can call Agent_OnUnload later.
2407 if (result == JNI_OK) {
2408 Arguments::add_loaded_agent(agent_lib);
2409 } else {
2410 delete agent_lib;
2411 }
2412
2413 // Agent_OnAttach executed so completion status is JNI_OK
2414 st->print_cr("%d", result);
2415 result = JNI_OK;
2416 }
2417 }
2418 return result;
2419 }
2420
2421 #endif // INCLUDE_SERVICES
2422 ////////////////////////////////////////////////////////////////////////////////////////////////
2423
2424 // Setup current current thread for event collection.
2425 void JvmtiEventCollector::setup_jvmti_thread_state() {
2426 // set this event collector to be the current one.
2427 JvmtiThreadState* state = JvmtiThreadState::state_for(JavaThread::current());
2428 // state can only be NULL if the current thread is exiting which
2429 // should not happen since we're trying to configure for event collection
2430 guarantee(state != NULL, "exiting thread called setup_jvmti_thread_state");
2431 if (is_vm_object_alloc_event()) {
2432 _prev = state->get_vm_object_alloc_event_collector();
2433 state->set_vm_object_alloc_event_collector((JvmtiVMObjectAllocEventCollector *)this);
2434 } else if (is_dynamic_code_event()) {
2435 _prev = state->get_dynamic_code_event_collector();
2436 state->set_dynamic_code_event_collector((JvmtiDynamicCodeEventCollector *)this);
2437 }
2438 }
2439
2440 // Unset current event collection in this thread and reset it with previous
2441 // collector.
2442 void JvmtiEventCollector::unset_jvmti_thread_state() {
2443 JvmtiThreadState* state = JavaThread::current()->jvmti_thread_state();
2444 if (state != NULL) {
2445 // restore the previous event collector (if any)
2446 if (is_vm_object_alloc_event()) {
2447 if (state->get_vm_object_alloc_event_collector() == this) {
2448 state->set_vm_object_alloc_event_collector((JvmtiVMObjectAllocEventCollector *)_prev);
2449 } else {
2450 // this thread's jvmti state was created during the scope of
2451 // the event collector.
2452 }
2453 } else {
2454 if (is_dynamic_code_event()) {
2455 if (state->get_dynamic_code_event_collector() == this) {
2456 state->set_dynamic_code_event_collector((JvmtiDynamicCodeEventCollector *)_prev);
2457 } else {
2458 // this thread's jvmti state was created during the scope of
2459 // the event collector.
2460 }
2461 }
2462 }
2463 }
2464 }
2465
2466 // create the dynamic code event collector
2467 JvmtiDynamicCodeEventCollector::JvmtiDynamicCodeEventCollector() : _code_blobs(NULL) {
2468 if (JvmtiExport::should_post_dynamic_code_generated()) {
2469 setup_jvmti_thread_state();
2470 }
2471 }
2472
2473 // iterate over any code blob descriptors collected and post a
2474 // DYNAMIC_CODE_GENERATED event to the profiler.
2475 JvmtiDynamicCodeEventCollector::~JvmtiDynamicCodeEventCollector() {
2476 assert(!JavaThread::current()->owns_locks(), "all locks must be released to post deferred events");
2477 // iterate over any code blob descriptors that we collected
2478 if (_code_blobs != NULL) {
2479 for (int i=0; i<_code_blobs->length(); i++) {
2480 JvmtiCodeBlobDesc* blob = _code_blobs->at(i);
2481 JvmtiExport::post_dynamic_code_generated(blob->name(), blob->code_begin(), blob->code_end());
2482 FreeHeap(blob);
2483 }
2484 delete _code_blobs;
2485 }
2486 unset_jvmti_thread_state();
2487 }
2488
2489 // register a stub
2490 void JvmtiDynamicCodeEventCollector::register_stub(const char* name, address start, address end) {
2491 if (_code_blobs == NULL) {
2492 _code_blobs = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<JvmtiCodeBlobDesc*>(1,true);
2493 }
2494 _code_blobs->append(new JvmtiCodeBlobDesc(name, start, end));
2495 }
2496
2497 // Setup current thread to record vm allocated objects.
2498 JvmtiVMObjectAllocEventCollector::JvmtiVMObjectAllocEventCollector() : _allocated(NULL) {
2499 if (JvmtiExport::should_post_vm_object_alloc()) {
2500 _enable = true;
2501 setup_jvmti_thread_state();
2502 } else {
2503 _enable = false;
2504 }
2505 }
2506
2507 // Post vm_object_alloc event for vm allocated objects visible to java
2508 // world.
2509 JvmtiVMObjectAllocEventCollector::~JvmtiVMObjectAllocEventCollector() {
2510 if (_allocated != NULL) {
2511 set_enabled(false);
2512 for (int i = 0; i < _allocated->length(); i++) {
2513 oop obj = _allocated->at(i);
2514 if (ServiceUtil::visible_oop(obj)) {
2515 JvmtiExport::post_vm_object_alloc(JavaThread::current(), obj);
2516 }
2517 }
2518 delete _allocated;
2519 }
2520 unset_jvmti_thread_state();
2521 }
2522
2523 void JvmtiVMObjectAllocEventCollector::record_allocation(oop obj) {
2524 assert(is_enabled(), "VM object alloc event collector is not enabled");
2525 if (_allocated == NULL) {
2526 _allocated = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<oop>(1, true);
2527 }
2528 _allocated->push(obj);
2529 }
2530
2531 // GC support.
2532 void JvmtiVMObjectAllocEventCollector::oops_do(OopClosure* f) {
2533 if (_allocated != NULL) {
2534 for(int i=_allocated->length() - 1; i >= 0; i--) {
2535 if (_allocated->at(i) != NULL) {
2536 f->do_oop(_allocated->adr_at(i));
2537 }
2538 }
2539 }
2540 }
2541
2542 void JvmtiVMObjectAllocEventCollector::oops_do_for_all_threads(OopClosure* f) {
2543 // no-op if jvmti not enabled
2544 if (!JvmtiEnv::environments_might_exist()) {
2545 return;
2546 }
2547
2548 // Runs at safepoint. So no need to acquire Threads_lock.
2549 for (JavaThread *jthr = Threads::first(); jthr != NULL; jthr = jthr->next()) {
2550 JvmtiThreadState *state = jthr->jvmti_thread_state();
2551 if (state != NULL) {
2552 JvmtiVMObjectAllocEventCollector *collector;
2553 collector = state->get_vm_object_alloc_event_collector();
2554 while (collector != NULL) {
2555 collector->oops_do(f);
2556 collector = (JvmtiVMObjectAllocEventCollector *)collector->get_prev();
2557 }
2558 }
2559 }
2560 }
2561
2562
2563 // Disable collection of VMObjectAlloc events
2564 NoJvmtiVMObjectAllocMark::NoJvmtiVMObjectAllocMark() : _collector(NULL) {
2565 // a no-op if VMObjectAlloc event is not enabled
2566 if (!JvmtiExport::should_post_vm_object_alloc()) {
2567 return;
2568 }
2569 Thread* thread = Thread::current_or_null();
2570 if (thread != NULL && thread->is_Java_thread()) {
2571 JavaThread* current_thread = (JavaThread*)thread;
2572 JvmtiThreadState *state = current_thread->jvmti_thread_state();
2573 if (state != NULL) {
2574 JvmtiVMObjectAllocEventCollector *collector;
2575 collector = state->get_vm_object_alloc_event_collector();
2576 if (collector != NULL && collector->is_enabled()) {
2577 _collector = collector;
2578 _collector->set_enabled(false);
2579 }
2580 }
2581 }
2582 }
2583
2584 // Re-Enable collection of VMObjectAlloc events (if previously enabled)
2585 NoJvmtiVMObjectAllocMark::~NoJvmtiVMObjectAllocMark() {
2586 if (was_enabled()) {
2587 _collector->set_enabled(true);
2588 }
2589 };
2590
2591 JvmtiGCMarker::JvmtiGCMarker() {
2592 // if there aren't any JVMTI environments then nothing to do
2593 if (!JvmtiEnv::environments_might_exist()) {
2594 return;
2595 }
2596
2597 if (JvmtiExport::should_post_garbage_collection_start()) {
2598 JvmtiExport::post_garbage_collection_start();
2599 }
2600
2601 if (SafepointSynchronize::is_at_safepoint()) {
2602 // Do clean up tasks that need to be done at a safepoint
2603 JvmtiEnvBase::check_for_periodic_clean_up();
2604 }
2605 }
2606
2607 JvmtiGCMarker::~JvmtiGCMarker() {
2608 // if there aren't any JVMTI environments then nothing to do
2609 if (!JvmtiEnv::environments_might_exist()) {
2610 return;
2611 }
2612
2613 // JVMTI notify gc finish
2614 if (JvmtiExport::should_post_garbage_collection_finish()) {
2615 JvmtiExport::post_garbage_collection_finish();
2616 }
2617 }