1 /*
2 * Copyright (c) 2003, 2018, 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 "logging/log.hpp"
33 #include "logging/logStream.hpp"
34 #include "memory/allocation.inline.hpp"
35 #include "memory/resourceArea.hpp"
36 #include "oops/objArrayKlass.hpp"
37 #include "oops/objArrayOop.hpp"
38 #include "oops/oop.inline.hpp"
39 #include "prims/jvmtiCodeBlobEvents.hpp"
40 #include "prims/jvmtiEventController.hpp"
41 #include "prims/jvmtiEventController.inline.hpp"
42 #include "prims/jvmtiExport.hpp"
43 #include "prims/jvmtiImpl.hpp"
44 #include "prims/jvmtiManageCapabilities.hpp"
45 #include "prims/jvmtiRawMonitor.hpp"
46 #include "prims/jvmtiRedefineClasses.hpp"
47 #include "prims/jvmtiTagMap.hpp"
48 #include "prims/jvmtiThreadState.inline.hpp"
49 #include "runtime/arguments.hpp"
50 #include "runtime/handles.hpp"
51 #include "runtime/interfaceSupport.inline.hpp"
52 #include "runtime/javaCalls.hpp"
53 #include "runtime/jniHandles.inline.hpp"
54 #include "runtime/objectMonitor.hpp"
55 #include "runtime/objectMonitor.inline.hpp"
56 #include "runtime/os.inline.hpp"
57 #include "runtime/safepointVerifiers.hpp"
58 #include "runtime/thread.inline.hpp"
59 #include "runtime/threadSMR.hpp"
60 #include "runtime/vframe.inline.hpp"
61 #include "utilities/macros.hpp"
62 #if INCLUDE_ALL_GCS
63 #include "gc/parallel/psMarkSweep.hpp"
64 #endif // INCLUDE_ALL_GCS
65
66 #ifdef JVMTI_TRACE
67 #define EVT_TRACE(evt,out) if ((JvmtiTrace::event_trace_flags(evt) & JvmtiTrace::SHOW_EVENT_SENT) != 0) { SafeResourceMark rm; log_trace(jvmti) out; }
68 #define EVT_TRIG_TRACE(evt,out) if ((JvmtiTrace::event_trace_flags(evt) & JvmtiTrace::SHOW_EVENT_TRIGGER) != 0) { SafeResourceMark rm; log_trace(jvmti) out; }
69 #else
70 #define EVT_TRIG_TRACE(evt,out)
71 #define EVT_TRACE(evt,out)
72 #endif
73
74 ///////////////////////////////////////////////////////////////
75 //
76 // JvmtiEventTransition
77 //
78 // TO DO --
79 // more handle purging
80
81 // Use this for JavaThreads and state is _thread_in_vm.
82 class JvmtiJavaThreadEventTransition : StackObj {
83 private:
84 ResourceMark _rm;
85 ThreadToNativeFromVM _transition;
86 HandleMark _hm;
87
88 public:
89 JvmtiJavaThreadEventTransition(JavaThread *thread) :
90 _rm(),
91 _transition(thread),
92 _hm(thread) {};
93 };
94
95 // For JavaThreads which are not in _thread_in_vm state
96 // and other system threads use this.
97 class JvmtiThreadEventTransition : StackObj {
98 private:
99 ResourceMark _rm;
100 HandleMark _hm;
101 JavaThreadState _saved_state;
102 JavaThread *_jthread;
103
104 public:
105 JvmtiThreadEventTransition(Thread *thread) : _rm(), _hm() {
106 if (thread->is_Java_thread()) {
107 _jthread = (JavaThread *)thread;
108 _saved_state = _jthread->thread_state();
109 if (_saved_state == _thread_in_Java) {
110 ThreadStateTransition::transition_from_java(_jthread, _thread_in_native);
111 } else {
112 ThreadStateTransition::transition(_jthread, _saved_state, _thread_in_native);
113 }
114 } else {
115 _jthread = NULL;
116 }
117 }
118
119 ~JvmtiThreadEventTransition() {
120 if (_jthread != NULL)
121 ThreadStateTransition::transition_from_native(_jthread, _saved_state);
122 }
123 };
124
125
126 ///////////////////////////////////////////////////////////////
127 //
128 // JvmtiEventMark
129 //
130
131 class JvmtiEventMark : public StackObj {
132 private:
133 JavaThread *_thread;
134 JNIEnv* _jni_env;
135 JvmtiThreadState::ExceptionState _saved_exception_state;
136 #if 0
137 JNIHandleBlock* _hblock;
138 #endif
139
140 public:
141 JvmtiEventMark(JavaThread *thread) : _thread(thread),
142 _jni_env(thread->jni_environment()),
143 _saved_exception_state(JvmtiThreadState::ES_CLEARED) {
144 #if 0
145 _hblock = thread->active_handles();
146 _hblock->clear_thoroughly(); // so we can be safe
147 #else
148 // we want to use the code above - but that needs the JNIHandle changes - later...
149 // for now, steal JNI push local frame code
150 JvmtiThreadState *state = thread->jvmti_thread_state();
151 // we are before an event.
152 // Save current jvmti thread exception state.
153 if (state != NULL) {
154 _saved_exception_state = state->get_exception_state();
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 state->restore_exception_state(_saved_exception_state);
188 }
189 }
190
191 #if 0
192 jobject to_jobject(oop obj) { return obj == NULL? NULL : _hblock->allocate_handle_fast(obj); }
193 #else
194 // we want to use the code above - but that needs the JNIHandle changes - later...
195 // for now, use regular make_local
196 jobject to_jobject(oop obj) { return JNIHandles::make_local(_thread,obj); }
197 #endif
198
199 jclass to_jclass(Klass* klass) { return (klass == NULL ? NULL : (jclass)to_jobject(klass->java_mirror())); }
200
201 jmethodID to_jmethodID(const methodHandle& method) { return method->jmethod_id(); }
202
203 JNIEnv* jni_env() { return _jni_env; }
204 };
205
206 class JvmtiThreadEventMark : public JvmtiEventMark {
207 private:
208 jthread _jt;
209
210 public:
211 JvmtiThreadEventMark(JavaThread *thread) :
212 JvmtiEventMark(thread) {
213 _jt = (jthread)(to_jobject(thread->threadObj()));
214 };
215 jthread jni_thread() { return _jt; }
216 };
217
218 class JvmtiClassEventMark : public JvmtiThreadEventMark {
219 private:
220 jclass _jc;
221
222 public:
223 JvmtiClassEventMark(JavaThread *thread, Klass* klass) :
224 JvmtiThreadEventMark(thread) {
225 _jc = to_jclass(klass);
226 };
227 jclass jni_class() { return _jc; }
228 };
229
230 class JvmtiMethodEventMark : public JvmtiThreadEventMark {
231 private:
232 jmethodID _mid;
233
234 public:
235 JvmtiMethodEventMark(JavaThread *thread, const methodHandle& method) :
236 JvmtiThreadEventMark(thread),
237 _mid(to_jmethodID(method)) {};
238 jmethodID jni_methodID() { return _mid; }
239 };
240
241 class JvmtiLocationEventMark : public JvmtiMethodEventMark {
242 private:
243 jlocation _loc;
244
245 public:
246 JvmtiLocationEventMark(JavaThread *thread, const methodHandle& method, address location) :
247 JvmtiMethodEventMark(thread, method),
248 _loc(location - method->code_base()) {};
249 jlocation location() { return _loc; }
250 };
251
252 class JvmtiExceptionEventMark : public JvmtiLocationEventMark {
253 private:
254 jobject _exc;
255
256 public:
257 JvmtiExceptionEventMark(JavaThread *thread, const methodHandle& method, address location, Handle exception) :
258 JvmtiLocationEventMark(thread, method, location),
259 _exc(to_jobject(exception())) {};
260 jobject exception() { return _exc; }
261 };
262
263 class JvmtiClassFileLoadEventMark : public JvmtiThreadEventMark {
264 private:
265 const char *_class_name;
266 jobject _jloader;
267 jobject _protection_domain;
268 jclass _class_being_redefined;
269
270 public:
271 JvmtiClassFileLoadEventMark(JavaThread *thread, Symbol* name,
272 Handle class_loader, Handle prot_domain, Klass* class_being_redefined) : JvmtiThreadEventMark(thread) {
273 _class_name = name != NULL? name->as_utf8() : NULL;
274 _jloader = (jobject)to_jobject(class_loader());
275 _protection_domain = (jobject)to_jobject(prot_domain());
276 if (class_being_redefined == NULL) {
277 _class_being_redefined = NULL;
278 } else {
279 _class_being_redefined = (jclass)to_jclass(class_being_redefined);
280 }
281 };
282 const char *class_name() {
283 return _class_name;
284 }
285 jobject jloader() {
286 return _jloader;
287 }
288 jobject protection_domain() {
289 return _protection_domain;
290 }
291 jclass class_being_redefined() {
292 return _class_being_redefined;
293 }
294 };
295
296 //////////////////////////////////////////////////////////////////////////////
297
298 int JvmtiExport::_field_access_count = 0;
299 int JvmtiExport::_field_modification_count = 0;
300
301 bool JvmtiExport::_can_access_local_variables = false;
302 bool JvmtiExport::_can_hotswap_or_post_breakpoint = false;
303 bool JvmtiExport::_can_modify_any_class = false;
304 bool JvmtiExport::_can_walk_any_space = false;
305
306 bool JvmtiExport::_has_redefined_a_class = false;
307 bool JvmtiExport::_all_dependencies_are_recorded = false;
308
309 //
310 // field access management
311 //
312
313 // interpreter generator needs the address of the counter
314 address JvmtiExport::get_field_access_count_addr() {
315 // We don't grab a lock because we don't want to
316 // serialize field access between all threads. This means that a
317 // thread on another processor can see the wrong count value and
318 // may either miss making a needed call into post_field_access()
319 // or will make an unneeded call into post_field_access(). We pay
320 // this price to avoid slowing down the VM when we aren't watching
321 // field accesses.
322 // Other access/mutation safe by virtue of being in VM state.
323 return (address)(&_field_access_count);
324 }
325
326 //
327 // field modification management
328 //
329
330 // interpreter generator needs the address of the counter
331 address JvmtiExport::get_field_modification_count_addr() {
332 // We don't grab a lock because we don't
333 // want to serialize field modification between all threads. This
334 // means that a thread on another processor can see the wrong
335 // count value and may either miss making a needed call into
336 // post_field_modification() or will make an unneeded call into
337 // post_field_modification(). We pay this price to avoid slowing
338 // down the VM when we aren't watching field modifications.
339 // Other access/mutation safe by virtue of being in VM state.
340 return (address)(&_field_modification_count);
341 }
342
343
344 ///////////////////////////////////////////////////////////////
345 // Functions needed by java.lang.instrument for starting up javaagent.
346 ///////////////////////////////////////////////////////////////
347
348 jint
349 JvmtiExport::get_jvmti_interface(JavaVM *jvm, void **penv, jint version) {
350 // The JVMTI_VERSION_INTERFACE_JVMTI part of the version number
351 // has already been validated in JNI GetEnv().
352 int major, minor, micro;
353
354 // micro version doesn't matter here (yet?)
355 decode_version_values(version, &major, &minor, µ);
356 switch (major) {
357 case 1:
358 switch (minor) {
359 case 0: // version 1.0.<micro> is recognized
360 case 1: // version 1.1.<micro> is recognized
361 case 2: // version 1.2.<micro> is recognized
362 break;
363
364 default:
365 return JNI_EVERSION; // unsupported minor version number
366 }
367 break;
368 case 9:
369 switch (minor) {
370 case 0: // version 9.0.<micro> is recognized
371 break;
372 default:
373 return JNI_EVERSION; // unsupported minor version number
374 }
375 break;
376 default:
377 return JNI_EVERSION; // unsupported major version number
378 }
379
380 if (JvmtiEnv::get_phase() == JVMTI_PHASE_LIVE) {
381 JavaThread* current_thread = JavaThread::current();
382 // transition code: native to VM
383 ThreadInVMfromNative __tiv(current_thread);
384 VM_ENTRY_BASE(jvmtiEnv*, JvmtiExport::get_jvmti_interface, current_thread)
385 debug_only(VMNativeEntryWrapper __vew;)
386
387 JvmtiEnv *jvmti_env = JvmtiEnv::create_a_jvmti(version);
388 *penv = jvmti_env->jvmti_external(); // actual type is jvmtiEnv* -- not to be confused with JvmtiEnv*
389 return JNI_OK;
390
391 } else if (JvmtiEnv::get_phase() == JVMTI_PHASE_ONLOAD) {
392 // not live, no thread to transition
393 JvmtiEnv *jvmti_env = JvmtiEnv::create_a_jvmti(version);
394 *penv = jvmti_env->jvmti_external(); // actual type is jvmtiEnv* -- not to be confused with JvmtiEnv*
395 return JNI_OK;
396
397 } else {
398 // Called at the wrong time
399 *penv = NULL;
400 return JNI_EDETACHED;
401 }
402 }
403
404 void
405 JvmtiExport::add_default_read_edges(Handle h_module, TRAPS) {
406 if (!Universe::is_module_initialized()) {
407 return; // extra safety
408 }
409 assert(!h_module.is_null(), "module should always be set");
410
411 // Invoke the transformedByAgent method
412 JavaValue result(T_VOID);
413 JavaCalls::call_static(&result,
414 SystemDictionary::module_Modules_klass(),
415 vmSymbols::transformedByAgent_name(),
416 vmSymbols::transformedByAgent_signature(),
417 h_module,
418 THREAD);
419
420 if (HAS_PENDING_EXCEPTION) {
421 LogTarget(Trace, jvmti) log;
422 LogStream log_stream(log);
423 java_lang_Throwable::print(PENDING_EXCEPTION, &log_stream);
424 log_stream.cr();
425 CLEAR_PENDING_EXCEPTION;
426 return;
427 }
428 }
429
430 jvmtiError
431 JvmtiExport::add_module_reads(Handle module, Handle to_module, TRAPS) {
432 if (!Universe::is_module_initialized()) {
433 return JVMTI_ERROR_NONE; // extra safety
434 }
435 assert(!module.is_null(), "module should always be set");
436 assert(!to_module.is_null(), "to_module should always be set");
437
438 // Invoke the addReads method
439 JavaValue result(T_VOID);
440 JavaCalls::call_static(&result,
441 SystemDictionary::module_Modules_klass(),
442 vmSymbols::addReads_name(),
443 vmSymbols::addReads_signature(),
444 module,
445 to_module,
446 THREAD);
447
448 if (HAS_PENDING_EXCEPTION) {
449 LogTarget(Trace, jvmti) log;
450 LogStream log_stream(log);
451 java_lang_Throwable::print(PENDING_EXCEPTION, &log_stream);
452 log_stream.cr();
453 CLEAR_PENDING_EXCEPTION;
454 return JVMTI_ERROR_INTERNAL;
455 }
456 return JVMTI_ERROR_NONE;
457 }
458
459 jvmtiError
460 JvmtiExport::add_module_exports(Handle module, Handle pkg_name, Handle to_module, TRAPS) {
461 if (!Universe::is_module_initialized()) {
462 return JVMTI_ERROR_NONE; // extra safety
463 }
464 assert(!module.is_null(), "module should always be set");
465 assert(!to_module.is_null(), "to_module should always be set");
466 assert(!pkg_name.is_null(), "pkg_name should always be set");
467
468 // Invoke the addExports method
469 JavaValue result(T_VOID);
470 JavaCalls::call_static(&result,
471 SystemDictionary::module_Modules_klass(),
472 vmSymbols::addExports_name(),
473 vmSymbols::addExports_signature(),
474 module,
475 pkg_name,
476 to_module,
477 THREAD);
478
479 if (HAS_PENDING_EXCEPTION) {
480 Symbol* ex_name = PENDING_EXCEPTION->klass()->name();
481 LogTarget(Trace, jvmti) log;
482 LogStream log_stream(log);
483 java_lang_Throwable::print(PENDING_EXCEPTION, &log_stream);
484 log_stream.cr();
485 CLEAR_PENDING_EXCEPTION;
486 if (ex_name == vmSymbols::java_lang_IllegalArgumentException()) {
487 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
488 }
489 return JVMTI_ERROR_INTERNAL;
490 }
491 return JVMTI_ERROR_NONE;
492 }
493
494 jvmtiError
495 JvmtiExport::add_module_opens(Handle module, Handle pkg_name, Handle to_module, TRAPS) {
496 if (!Universe::is_module_initialized()) {
497 return JVMTI_ERROR_NONE; // extra safety
498 }
499 assert(!module.is_null(), "module should always be set");
500 assert(!to_module.is_null(), "to_module should always be set");
501 assert(!pkg_name.is_null(), "pkg_name should always be set");
502
503 // Invoke the addOpens method
504 JavaValue result(T_VOID);
505 JavaCalls::call_static(&result,
506 SystemDictionary::module_Modules_klass(),
507 vmSymbols::addOpens_name(),
508 vmSymbols::addExports_signature(),
509 module,
510 pkg_name,
511 to_module,
512 THREAD);
513
514 if (HAS_PENDING_EXCEPTION) {
515 Symbol* ex_name = PENDING_EXCEPTION->klass()->name();
516 LogTarget(Trace, jvmti) log;
517 LogStream log_stream(log);
518 java_lang_Throwable::print(PENDING_EXCEPTION, &log_stream);
519 log_stream.cr();
520 CLEAR_PENDING_EXCEPTION;
521 if (ex_name == vmSymbols::java_lang_IllegalArgumentException()) {
522 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
523 }
524 return JVMTI_ERROR_INTERNAL;
525 }
526 return JVMTI_ERROR_NONE;
527 }
528
529 jvmtiError
530 JvmtiExport::add_module_uses(Handle module, Handle service, TRAPS) {
531 if (!Universe::is_module_initialized()) {
532 return JVMTI_ERROR_NONE; // extra safety
533 }
534 assert(!module.is_null(), "module should always be set");
535 assert(!service.is_null(), "service should always be set");
536
537 // Invoke the addUses method
538 JavaValue result(T_VOID);
539 JavaCalls::call_static(&result,
540 SystemDictionary::module_Modules_klass(),
541 vmSymbols::addUses_name(),
542 vmSymbols::addUses_signature(),
543 module,
544 service,
545 THREAD);
546
547 if (HAS_PENDING_EXCEPTION) {
548 LogTarget(Trace, jvmti) log;
549 LogStream log_stream(log);
550 java_lang_Throwable::print(PENDING_EXCEPTION, &log_stream);
551 log_stream.cr();
552 CLEAR_PENDING_EXCEPTION;
553 return JVMTI_ERROR_INTERNAL;
554 }
555 return JVMTI_ERROR_NONE;
556 }
557
558 jvmtiError
559 JvmtiExport::add_module_provides(Handle module, Handle service, Handle impl_class, TRAPS) {
560 if (!Universe::is_module_initialized()) {
561 return JVMTI_ERROR_NONE; // extra safety
562 }
563 assert(!module.is_null(), "module should always be set");
564 assert(!service.is_null(), "service should always be set");
565 assert(!impl_class.is_null(), "impl_class should always be set");
566
567 // Invoke the addProvides method
568 JavaValue result(T_VOID);
569 JavaCalls::call_static(&result,
570 SystemDictionary::module_Modules_klass(),
571 vmSymbols::addProvides_name(),
572 vmSymbols::addProvides_signature(),
573 module,
574 service,
575 impl_class,
576 THREAD);
577
578 if (HAS_PENDING_EXCEPTION) {
579 LogTarget(Trace, jvmti) log;
580 LogStream log_stream(log);
581 java_lang_Throwable::print(PENDING_EXCEPTION, &log_stream);
582 log_stream.cr();
583 CLEAR_PENDING_EXCEPTION;
584 return JVMTI_ERROR_INTERNAL;
585 }
586 return JVMTI_ERROR_NONE;
587 }
588
589 void
590 JvmtiExport::decode_version_values(jint version, int * major, int * minor,
591 int * micro) {
592 *major = (version & JVMTI_VERSION_MASK_MAJOR) >> JVMTI_VERSION_SHIFT_MAJOR;
593 *minor = (version & JVMTI_VERSION_MASK_MINOR) >> JVMTI_VERSION_SHIFT_MINOR;
594 *micro = (version & JVMTI_VERSION_MASK_MICRO) >> JVMTI_VERSION_SHIFT_MICRO;
595 }
596
597 void JvmtiExport::enter_primordial_phase() {
598 JvmtiEnvBase::set_phase(JVMTI_PHASE_PRIMORDIAL);
599 }
600
601 void JvmtiExport::enter_early_start_phase() {
602 set_early_vmstart_recorded(true);
603 }
604
605 void JvmtiExport::enter_start_phase() {
606 JvmtiEnvBase::set_phase(JVMTI_PHASE_START);
607 }
608
609 void JvmtiExport::enter_onload_phase() {
610 JvmtiEnvBase::set_phase(JVMTI_PHASE_ONLOAD);
611 }
612
613 void JvmtiExport::enter_live_phase() {
614 JvmtiEnvBase::set_phase(JVMTI_PHASE_LIVE);
615 }
616
617 //
618 // JVMTI events that the VM posts to the debugger and also startup agent
619 // and call the agent's premain() for java.lang.instrument.
620 //
621
622 void JvmtiExport::post_early_vm_start() {
623 EVT_TRIG_TRACE(JVMTI_EVENT_VM_START, ("Trg Early VM start event triggered" ));
624
625 // can now enable some events
626 JvmtiEventController::vm_start();
627
628 JvmtiEnvIterator it;
629 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
630 // Only early vmstart envs post early VMStart event
631 if (env->early_vmstart_env() && env->is_enabled(JVMTI_EVENT_VM_START)) {
632 EVT_TRACE(JVMTI_EVENT_VM_START, ("Evt Early VM start event sent" ));
633 JavaThread *thread = JavaThread::current();
634 JvmtiThreadEventMark jem(thread);
635 JvmtiJavaThreadEventTransition jet(thread);
636 jvmtiEventVMStart callback = env->callbacks()->VMStart;
637 if (callback != NULL) {
638 (*callback)(env->jvmti_external(), jem.jni_env());
639 }
640 }
641 }
642 }
643
644 void JvmtiExport::post_vm_start() {
645 EVT_TRIG_TRACE(JVMTI_EVENT_VM_START, ("Trg VM start event triggered" ));
646
647 // can now enable some events
648 JvmtiEventController::vm_start();
649
650 JvmtiEnvIterator it;
651 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
652 // Early vmstart envs do not post normal VMStart event
653 if (!env->early_vmstart_env() && env->is_enabled(JVMTI_EVENT_VM_START)) {
654 EVT_TRACE(JVMTI_EVENT_VM_START, ("Evt VM start event sent" ));
655
656 JavaThread *thread = JavaThread::current();
657 JvmtiThreadEventMark jem(thread);
658 JvmtiJavaThreadEventTransition jet(thread);
659 jvmtiEventVMStart callback = env->callbacks()->VMStart;
660 if (callback != NULL) {
661 (*callback)(env->jvmti_external(), jem.jni_env());
662 }
663 }
664 }
665 }
666
667
668 void JvmtiExport::post_vm_initialized() {
669 EVT_TRIG_TRACE(JVMTI_EVENT_VM_INIT, ("Trg VM init event triggered" ));
670
671 // can now enable events
672 JvmtiEventController::vm_init();
673
674 JvmtiEnvIterator it;
675 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
676 if (env->is_enabled(JVMTI_EVENT_VM_INIT)) {
677 EVT_TRACE(JVMTI_EVENT_VM_INIT, ("Evt VM init event sent" ));
678
679 JavaThread *thread = JavaThread::current();
680 JvmtiThreadEventMark jem(thread);
681 JvmtiJavaThreadEventTransition jet(thread);
682 jvmtiEventVMInit callback = env->callbacks()->VMInit;
683 if (callback != NULL) {
684 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread());
685 }
686 }
687 }
688 }
689
690
691 void JvmtiExport::post_vm_death() {
692 EVT_TRIG_TRACE(JVMTI_EVENT_VM_DEATH, ("Trg VM death event triggered" ));
693
694 JvmtiEnvIterator it;
695 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
696 if (env->is_enabled(JVMTI_EVENT_VM_DEATH)) {
697 EVT_TRACE(JVMTI_EVENT_VM_DEATH, ("Evt VM death event sent" ));
698
699 JavaThread *thread = JavaThread::current();
700 JvmtiEventMark jem(thread);
701 JvmtiJavaThreadEventTransition jet(thread);
702 jvmtiEventVMDeath callback = env->callbacks()->VMDeath;
703 if (callback != NULL) {
704 (*callback)(env->jvmti_external(), jem.jni_env());
705 }
706 }
707 }
708
709 JvmtiEnvBase::set_phase(JVMTI_PHASE_DEAD);
710 JvmtiEventController::vm_death();
711 }
712
713 char**
714 JvmtiExport::get_all_native_method_prefixes(int* count_ptr) {
715 // Have to grab JVMTI thread state lock to be sure environment doesn't
716 // go away while we iterate them. No locks during VM bring-up.
717 if (Threads::number_of_threads() == 0 || SafepointSynchronize::is_at_safepoint()) {
718 return JvmtiEnvBase::get_all_native_method_prefixes(count_ptr);
719 } else {
720 MutexLocker mu(JvmtiThreadState_lock);
721 return JvmtiEnvBase::get_all_native_method_prefixes(count_ptr);
722 }
723 }
724
725 // Convert an external thread reference to a JavaThread found on the
726 // specified ThreadsList. The ThreadsListHandle in the caller "protects"
727 // the returned JavaThread *.
728 //
729 // If thread_oop_p is not NULL, then the caller wants to use the oop
730 // after this call so the oop is returned. On success, *jt_pp is set
731 // to the converted JavaThread * and JVMTI_ERROR_NONE is returned.
732 // On error, returns various JVMTI_ERROR_* values.
733 //
734 jvmtiError
735 JvmtiExport::cv_external_thread_to_JavaThread(ThreadsList * t_list,
736 jthread thread,
737 JavaThread ** jt_pp,
738 oop * thread_oop_p) {
739 assert(t_list != NULL, "must have a ThreadsList");
740 assert(jt_pp != NULL, "must have a return JavaThread pointer");
741 // thread_oop_p is optional so no assert()
742
743 oop thread_oop = JNIHandles::resolve_external_guard(thread);
744 if (thread_oop == NULL) {
745 // NULL jthread, GC'ed jthread or a bad JNI handle.
746 return JVMTI_ERROR_INVALID_THREAD;
747 }
748 // Looks like an oop at this point.
749
750 if (!thread_oop->is_a(SystemDictionary::Thread_klass())) {
751 // The oop is not a java.lang.Thread.
752 return JVMTI_ERROR_INVALID_THREAD;
753 }
754 // Looks like a java.lang.Thread oop at this point.
755
756 if (thread_oop_p != NULL) {
757 // Return the oop to the caller; the caller may still want
758 // the oop even if this function returns an error.
759 *thread_oop_p = thread_oop;
760 }
761
762 JavaThread * java_thread = java_lang_Thread::thread(thread_oop);
763 if (java_thread == NULL) {
764 // The java.lang.Thread does not contain a JavaThread * so it has
765 // not yet run or it has died.
766 return JVMTI_ERROR_THREAD_NOT_ALIVE;
767 }
768 // Looks like a live JavaThread at this point.
769
770 // We do not check the EnableThreadSMRExtraValidityChecks option
771 // for this includes() call because JVM/TI's spec is tighter.
772 if (!t_list->includes(java_thread)) {
773 // Not on the JavaThreads list so it is not alive.
774 return JVMTI_ERROR_THREAD_NOT_ALIVE;
775 }
776
777 // Return a live JavaThread that is "protected" by the
778 // ThreadsListHandle in the caller.
779 *jt_pp = java_thread;
780
781 return JVMTI_ERROR_NONE;
782 }
783
784 // Convert an oop to a JavaThread found on the specified ThreadsList.
785 // The ThreadsListHandle in the caller "protects" the returned
786 // JavaThread *.
787 //
788 // On success, *jt_pp is set to the converted JavaThread * and
789 // JVMTI_ERROR_NONE is returned. On error, returns various
790 // JVMTI_ERROR_* values.
791 //
792 jvmtiError
793 JvmtiExport::cv_oop_to_JavaThread(ThreadsList * t_list, oop thread_oop,
794 JavaThread ** jt_pp) {
795 assert(t_list != NULL, "must have a ThreadsList");
796 assert(thread_oop != NULL, "must have an oop");
797 assert(jt_pp != NULL, "must have a return JavaThread pointer");
798
799 if (!thread_oop->is_a(SystemDictionary::Thread_klass())) {
800 // The oop is not a java.lang.Thread.
801 return JVMTI_ERROR_INVALID_THREAD;
802 }
803 // Looks like a java.lang.Thread oop at this point.
804
805 JavaThread * java_thread = java_lang_Thread::thread(thread_oop);
806 if (java_thread == NULL) {
807 // The java.lang.Thread does not contain a JavaThread * so it has
808 // not yet run or it has died.
809 return JVMTI_ERROR_THREAD_NOT_ALIVE;
810 }
811 // Looks like a live JavaThread at this point.
812
813 // We do not check the EnableThreadSMRExtraValidityChecks option
814 // for this includes() call because JVM/TI's spec is tighter.
815 if (!t_list->includes(java_thread)) {
816 // Not on the JavaThreads list so it is not alive.
817 return JVMTI_ERROR_THREAD_NOT_ALIVE;
818 }
819
820 // Return a live JavaThread that is "protected" by the
821 // ThreadsListHandle in the caller.
822 *jt_pp = java_thread;
823
824 return JVMTI_ERROR_NONE;
825 }
826
827 class JvmtiClassFileLoadHookPoster : public StackObj {
828 private:
829 Symbol* _h_name;
830 Handle _class_loader;
831 Handle _h_protection_domain;
832 unsigned char ** _data_ptr;
833 unsigned char ** _end_ptr;
834 JavaThread * _thread;
835 jint _curr_len;
836 unsigned char * _curr_data;
837 JvmtiEnv * _curr_env;
838 JvmtiCachedClassFileData ** _cached_class_file_ptr;
839 JvmtiThreadState * _state;
840 Klass* _class_being_redefined;
841 JvmtiClassLoadKind _load_kind;
842 bool _has_been_modified;
843
844 public:
845 inline JvmtiClassFileLoadHookPoster(Symbol* h_name, Handle class_loader,
846 Handle h_protection_domain,
847 unsigned char **data_ptr, unsigned char **end_ptr,
848 JvmtiCachedClassFileData **cache_ptr) {
849 _h_name = h_name;
850 _class_loader = class_loader;
851 _h_protection_domain = h_protection_domain;
852 _data_ptr = data_ptr;
853 _end_ptr = end_ptr;
854 _thread = JavaThread::current();
855 _curr_len = *end_ptr - *data_ptr;
856 _curr_data = *data_ptr;
857 _curr_env = NULL;
858 _cached_class_file_ptr = cache_ptr;
859 _has_been_modified = false;
860
861 _state = _thread->jvmti_thread_state();
862 if (_state != NULL) {
863 _class_being_redefined = _state->get_class_being_redefined();
864 _load_kind = _state->get_class_load_kind();
865 Klass* klass = (_class_being_redefined == NULL) ? NULL : _class_being_redefined;
866 if (_load_kind != jvmti_class_load_kind_load && klass != NULL) {
867 ModuleEntry* module_entry = InstanceKlass::cast(klass)->module();
868 assert(module_entry != NULL, "module_entry should always be set");
869 if (module_entry->is_named() &&
870 module_entry->module() != NULL &&
871 !module_entry->has_default_read_edges()) {
872 if (!module_entry->set_has_default_read_edges()) {
873 // We won a potential race.
874 // Add read edges to the unnamed modules of the bootstrap and app class loaders
875 Handle class_module(_thread, module_entry->module()); // Obtain j.l.r.Module
876 JvmtiExport::add_default_read_edges(class_module, _thread);
877 }
878 }
879 }
880 // Clear class_being_redefined flag here. The action
881 // from agent handler could generate a new class file load
882 // hook event and if it is not cleared the new event generated
883 // from regular class file load could have this stale redefined
884 // class handle info.
885 _state->clear_class_being_redefined();
886 } else {
887 // redefine and retransform will always set the thread state
888 _class_being_redefined = NULL;
889 _load_kind = jvmti_class_load_kind_load;
890 }
891 }
892
893 void post() {
894 post_all_envs();
895 copy_modified_data();
896 }
897
898 bool has_been_modified() { return _has_been_modified; }
899
900 private:
901 void post_all_envs() {
902 if (_load_kind != jvmti_class_load_kind_retransform) {
903 // for class load and redefine,
904 // call the non-retransformable agents
905 JvmtiEnvIterator it;
906 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
907 if (!env->is_retransformable() && env->is_enabled(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK)) {
908 // non-retransformable agents cannot retransform back,
909 // so no need to cache the original class file bytes
910 post_to_env(env, false);
911 }
912 }
913 }
914 JvmtiEnvIterator it;
915 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
916 // retransformable agents get all events
917 if (env->is_retransformable() && env->is_enabled(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK)) {
918 // retransformable agents need to cache the original class file
919 // bytes if changes are made via the ClassFileLoadHook
920 post_to_env(env, true);
921 }
922 }
923 }
924
925 void post_to_env(JvmtiEnv* env, bool caching_needed) {
926 if (env->phase() == JVMTI_PHASE_PRIMORDIAL && !env->early_class_hook_env()) {
927 return;
928 }
929 unsigned char *new_data = NULL;
930 jint new_len = 0;
931 JvmtiClassFileLoadEventMark jem(_thread, _h_name, _class_loader,
932 _h_protection_domain,
933 _class_being_redefined);
934 JvmtiJavaThreadEventTransition jet(_thread);
935 jvmtiEventClassFileLoadHook callback = env->callbacks()->ClassFileLoadHook;
936 if (callback != NULL) {
937 (*callback)(env->jvmti_external(), jem.jni_env(),
938 jem.class_being_redefined(),
939 jem.jloader(), jem.class_name(),
940 jem.protection_domain(),
941 _curr_len, _curr_data,
942 &new_len, &new_data);
943 }
944 if (new_data != NULL) {
945 // this agent has modified class data.
946 _has_been_modified = true;
947 if (caching_needed && *_cached_class_file_ptr == NULL) {
948 // data has been changed by the new retransformable agent
949 // and it hasn't already been cached, cache it
950 JvmtiCachedClassFileData *p;
951 p = (JvmtiCachedClassFileData *)os::malloc(
952 offset_of(JvmtiCachedClassFileData, data) + _curr_len, mtInternal);
953 if (p == NULL) {
954 vm_exit_out_of_memory(offset_of(JvmtiCachedClassFileData, data) + _curr_len,
955 OOM_MALLOC_ERROR,
956 "unable to allocate cached copy of original class bytes");
957 }
958 p->length = _curr_len;
959 memcpy(p->data, _curr_data, _curr_len);
960 *_cached_class_file_ptr = p;
961 }
962
963 if (_curr_data != *_data_ptr) {
964 // curr_data is previous agent modified class data.
965 // And this has been changed by the new agent so
966 // we can delete it now.
967 _curr_env->Deallocate(_curr_data);
968 }
969
970 // Class file data has changed by the current agent.
971 _curr_data = new_data;
972 _curr_len = new_len;
973 // Save the current agent env we need this to deallocate the
974 // memory allocated by this agent.
975 _curr_env = env;
976 }
977 }
978
979 void copy_modified_data() {
980 // if one of the agent has modified class file data.
981 // Copy modified class data to new resources array.
982 if (_curr_data != *_data_ptr) {
983 *_data_ptr = NEW_RESOURCE_ARRAY(u1, _curr_len);
984 memcpy(*_data_ptr, _curr_data, _curr_len);
985 *_end_ptr = *_data_ptr + _curr_len;
986 _curr_env->Deallocate(_curr_data);
987 }
988 }
989 };
990
991 bool JvmtiExport::_should_post_class_file_load_hook = false;
992
993 // this entry is for class file load hook on class load, redefine and retransform
994 bool JvmtiExport::post_class_file_load_hook(Symbol* h_name,
995 Handle class_loader,
996 Handle h_protection_domain,
997 unsigned char **data_ptr,
998 unsigned char **end_ptr,
999 JvmtiCachedClassFileData **cache_ptr) {
1000 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) {
1001 return false;
1002 }
1003
1004 JvmtiClassFileLoadHookPoster poster(h_name, class_loader,
1005 h_protection_domain,
1006 data_ptr, end_ptr,
1007 cache_ptr);
1008 poster.post();
1009 return poster.has_been_modified();
1010 }
1011
1012 void JvmtiExport::report_unsupported(bool on) {
1013 // If any JVMTI service is turned on, we need to exit before native code
1014 // tries to access nonexistant services.
1015 if (on) {
1016 vm_exit_during_initialization("Java Kernel does not support JVMTI.");
1017 }
1018 }
1019
1020
1021 static inline Klass* oop_to_klass(oop obj) {
1022 Klass* k = obj->klass();
1023
1024 // if the object is a java.lang.Class then return the java mirror
1025 if (k == SystemDictionary::Class_klass()) {
1026 if (!java_lang_Class::is_primitive(obj)) {
1027 k = java_lang_Class::as_Klass(obj);
1028 assert(k != NULL, "class for non-primitive mirror must exist");
1029 }
1030 }
1031 return k;
1032 }
1033
1034 class JvmtiObjectAllocEventMark : public JvmtiClassEventMark {
1035 private:
1036 jobject _jobj;
1037 jlong _size;
1038 public:
1039 JvmtiObjectAllocEventMark(JavaThread *thread, oop obj) : JvmtiClassEventMark(thread, oop_to_klass(obj)) {
1040 _jobj = (jobject)to_jobject(obj);
1041 _size = obj->size() * wordSize;
1042 };
1043 jobject jni_jobject() { return _jobj; }
1044 jlong size() { return _size; }
1045 };
1046
1047 class JvmtiCompiledMethodLoadEventMark : public JvmtiMethodEventMark {
1048 private:
1049 jint _code_size;
1050 const void *_code_data;
1051 jint _map_length;
1052 jvmtiAddrLocationMap *_map;
1053 const void *_compile_info;
1054 public:
1055 JvmtiCompiledMethodLoadEventMark(JavaThread *thread, nmethod *nm, void* compile_info_ptr = NULL)
1056 : JvmtiMethodEventMark(thread,methodHandle(thread, nm->method())) {
1057 _code_data = nm->insts_begin();
1058 _code_size = nm->insts_size();
1059 _compile_info = compile_info_ptr; // Set void pointer of compiledMethodLoad Event. Default value is NULL.
1060 JvmtiCodeBlobEvents::build_jvmti_addr_location_map(nm, &_map, &_map_length);
1061 }
1062 ~JvmtiCompiledMethodLoadEventMark() {
1063 FREE_C_HEAP_ARRAY(jvmtiAddrLocationMap, _map);
1064 }
1065
1066 jint code_size() { return _code_size; }
1067 const void *code_data() { return _code_data; }
1068 jint map_length() { return _map_length; }
1069 const jvmtiAddrLocationMap* map() { return _map; }
1070 const void *compile_info() { return _compile_info; }
1071 };
1072
1073
1074
1075 class JvmtiMonitorEventMark : public JvmtiThreadEventMark {
1076 private:
1077 jobject _jobj;
1078 public:
1079 JvmtiMonitorEventMark(JavaThread *thread, oop object)
1080 : JvmtiThreadEventMark(thread){
1081 _jobj = to_jobject(object);
1082 }
1083 jobject jni_object() { return _jobj; }
1084 };
1085
1086 ///////////////////////////////////////////////////////////////
1087 //
1088 // pending CompiledMethodUnload support
1089 //
1090
1091 void JvmtiExport::post_compiled_method_unload(
1092 jmethodID method, const void *code_begin) {
1093 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) {
1094 return;
1095 }
1096 JavaThread* thread = JavaThread::current();
1097 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_UNLOAD,
1098 ("[%s] method compile unload event triggered",
1099 JvmtiTrace::safe_get_thread_name(thread)));
1100
1101 // post the event for each environment that has this event enabled.
1102 JvmtiEnvIterator it;
1103 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1104 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_UNLOAD)) {
1105 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) {
1106 continue;
1107 }
1108 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_UNLOAD,
1109 ("[%s] class compile method unload event sent jmethodID " PTR_FORMAT,
1110 JvmtiTrace::safe_get_thread_name(thread), p2i(method)));
1111
1112 ResourceMark rm(thread);
1113
1114 JvmtiEventMark jem(thread);
1115 JvmtiJavaThreadEventTransition jet(thread);
1116 jvmtiEventCompiledMethodUnload callback = env->callbacks()->CompiledMethodUnload;
1117 if (callback != NULL) {
1118 (*callback)(env->jvmti_external(), method, code_begin);
1119 }
1120 }
1121 }
1122 }
1123
1124 ///////////////////////////////////////////////////////////////
1125 //
1126 // JvmtiExport
1127 //
1128
1129 void JvmtiExport::post_raw_breakpoint(JavaThread *thread, Method* method, address location) {
1130 HandleMark hm(thread);
1131 methodHandle mh(thread, method);
1132
1133 JvmtiThreadState *state = thread->jvmti_thread_state();
1134 if (state == NULL) {
1135 return;
1136 }
1137 EVT_TRIG_TRACE(JVMTI_EVENT_BREAKPOINT, ("[%s] Trg Breakpoint triggered",
1138 JvmtiTrace::safe_get_thread_name(thread)));
1139 JvmtiEnvThreadStateIterator it(state);
1140 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1141 ets->compare_and_set_current_location(mh(), location, JVMTI_EVENT_BREAKPOINT);
1142 if (!ets->breakpoint_posted() && ets->is_enabled(JVMTI_EVENT_BREAKPOINT)) {
1143 ThreadState old_os_state = thread->osthread()->get_state();
1144 thread->osthread()->set_state(BREAKPOINTED);
1145 EVT_TRACE(JVMTI_EVENT_BREAKPOINT, ("[%s] Evt Breakpoint sent %s.%s @ " INTX_FORMAT,
1146 JvmtiTrace::safe_get_thread_name(thread),
1147 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1148 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1149 location - mh()->code_base() ));
1150
1151 JvmtiEnv *env = ets->get_env();
1152 JvmtiLocationEventMark jem(thread, mh, location);
1153 JvmtiJavaThreadEventTransition jet(thread);
1154 jvmtiEventBreakpoint callback = env->callbacks()->Breakpoint;
1155 if (callback != NULL) {
1156 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1157 jem.jni_methodID(), jem.location());
1158 }
1159
1160 ets->set_breakpoint_posted();
1161 thread->osthread()->set_state(old_os_state);
1162 }
1163 }
1164 }
1165
1166 //////////////////////////////////////////////////////////////////////////////
1167
1168 bool JvmtiExport::_can_get_source_debug_extension = false;
1169 bool JvmtiExport::_can_maintain_original_method_order = false;
1170 bool JvmtiExport::_can_post_interpreter_events = false;
1171 bool JvmtiExport::_can_post_on_exceptions = false;
1172 bool JvmtiExport::_can_post_breakpoint = false;
1173 bool JvmtiExport::_can_post_field_access = false;
1174 bool JvmtiExport::_can_post_field_modification = false;
1175 bool JvmtiExport::_can_post_method_entry = false;
1176 bool JvmtiExport::_can_post_method_exit = false;
1177 bool JvmtiExport::_can_pop_frame = false;
1178 bool JvmtiExport::_can_force_early_return = false;
1179
1180 bool JvmtiExport::_early_vmstart_recorded = false;
1181
1182 bool JvmtiExport::_should_post_single_step = false;
1183 bool JvmtiExport::_should_post_field_access = false;
1184 bool JvmtiExport::_should_post_field_modification = false;
1185 bool JvmtiExport::_should_post_class_load = false;
1186 bool JvmtiExport::_should_post_class_prepare = false;
1187 bool JvmtiExport::_should_post_class_unload = false;
1188 bool JvmtiExport::_should_post_thread_life = false;
1189 bool JvmtiExport::_should_clean_up_heap_objects = false;
1190 bool JvmtiExport::_should_post_native_method_bind = false;
1191 bool JvmtiExport::_should_post_dynamic_code_generated = false;
1192 bool JvmtiExport::_should_post_data_dump = false;
1193 bool JvmtiExport::_should_post_compiled_method_load = false;
1194 bool JvmtiExport::_should_post_compiled_method_unload = false;
1195 bool JvmtiExport::_should_post_monitor_contended_enter = false;
1196 bool JvmtiExport::_should_post_monitor_contended_entered = false;
1197 bool JvmtiExport::_should_post_monitor_wait = false;
1198 bool JvmtiExport::_should_post_monitor_waited = false;
1199 bool JvmtiExport::_should_post_garbage_collection_start = false;
1200 bool JvmtiExport::_should_post_garbage_collection_finish = false;
1201 bool JvmtiExport::_should_post_object_free = false;
1202 bool JvmtiExport::_should_post_resource_exhausted = false;
1203 bool JvmtiExport::_should_post_vm_object_alloc = false;
1204 bool JvmtiExport::_should_post_sampled_object_alloc = false;
1205 bool JvmtiExport::_should_post_on_exceptions = false;
1206
1207 ////////////////////////////////////////////////////////////////////////////////////////////////
1208
1209
1210 //
1211 // JVMTI single step management
1212 //
1213 void JvmtiExport::at_single_stepping_point(JavaThread *thread, Method* method, address location) {
1214 assert(JvmtiExport::should_post_single_step(), "must be single stepping");
1215
1216 HandleMark hm(thread);
1217 methodHandle mh(thread, method);
1218
1219 // update information about current location and post a step event
1220 JvmtiThreadState *state = thread->jvmti_thread_state();
1221 if (state == NULL) {
1222 return;
1223 }
1224 EVT_TRIG_TRACE(JVMTI_EVENT_SINGLE_STEP, ("[%s] Trg Single Step triggered",
1225 JvmtiTrace::safe_get_thread_name(thread)));
1226 if (!state->hide_single_stepping()) {
1227 if (state->is_pending_step_for_popframe()) {
1228 state->process_pending_step_for_popframe();
1229 }
1230 if (state->is_pending_step_for_earlyret()) {
1231 state->process_pending_step_for_earlyret();
1232 }
1233 JvmtiExport::post_single_step(thread, mh(), location);
1234 }
1235 }
1236
1237
1238 void JvmtiExport::expose_single_stepping(JavaThread *thread) {
1239 JvmtiThreadState *state = thread->jvmti_thread_state();
1240 if (state != NULL) {
1241 state->clear_hide_single_stepping();
1242 }
1243 }
1244
1245
1246 bool JvmtiExport::hide_single_stepping(JavaThread *thread) {
1247 JvmtiThreadState *state = thread->jvmti_thread_state();
1248 if (state != NULL && state->is_enabled(JVMTI_EVENT_SINGLE_STEP)) {
1249 state->set_hide_single_stepping();
1250 return true;
1251 } else {
1252 return false;
1253 }
1254 }
1255
1256 void JvmtiExport::post_class_load(JavaThread *thread, Klass* klass) {
1257 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) {
1258 return;
1259 }
1260 HandleMark hm(thread);
1261
1262 EVT_TRIG_TRACE(JVMTI_EVENT_CLASS_LOAD, ("[%s] Trg Class Load triggered",
1263 JvmtiTrace::safe_get_thread_name(thread)));
1264 JvmtiThreadState* state = thread->jvmti_thread_state();
1265 if (state == NULL) {
1266 return;
1267 }
1268 JvmtiEnvThreadStateIterator it(state);
1269 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1270 if (ets->is_enabled(JVMTI_EVENT_CLASS_LOAD)) {
1271 JvmtiEnv *env = ets->get_env();
1272 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) {
1273 continue;
1274 }
1275 EVT_TRACE(JVMTI_EVENT_CLASS_LOAD, ("[%s] Evt Class Load sent %s",
1276 JvmtiTrace::safe_get_thread_name(thread),
1277 klass==NULL? "NULL" : klass->external_name() ));
1278 JvmtiClassEventMark jem(thread, klass);
1279 JvmtiJavaThreadEventTransition jet(thread);
1280 jvmtiEventClassLoad callback = env->callbacks()->ClassLoad;
1281 if (callback != NULL) {
1282 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_class());
1283 }
1284 }
1285 }
1286 }
1287
1288
1289 void JvmtiExport::post_class_prepare(JavaThread *thread, Klass* klass) {
1290 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) {
1291 return;
1292 }
1293 HandleMark hm(thread);
1294
1295 EVT_TRIG_TRACE(JVMTI_EVENT_CLASS_PREPARE, ("[%s] Trg Class Prepare triggered",
1296 JvmtiTrace::safe_get_thread_name(thread)));
1297 JvmtiThreadState* state = thread->jvmti_thread_state();
1298 if (state == NULL) {
1299 return;
1300 }
1301 JvmtiEnvThreadStateIterator it(state);
1302 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1303 if (ets->is_enabled(JVMTI_EVENT_CLASS_PREPARE)) {
1304 JvmtiEnv *env = ets->get_env();
1305 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) {
1306 continue;
1307 }
1308 EVT_TRACE(JVMTI_EVENT_CLASS_PREPARE, ("[%s] Evt Class Prepare sent %s",
1309 JvmtiTrace::safe_get_thread_name(thread),
1310 klass==NULL? "NULL" : klass->external_name() ));
1311 JvmtiClassEventMark jem(thread, klass);
1312 JvmtiJavaThreadEventTransition jet(thread);
1313 jvmtiEventClassPrepare callback = env->callbacks()->ClassPrepare;
1314 if (callback != NULL) {
1315 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_class());
1316 }
1317 }
1318 }
1319 }
1320
1321 void JvmtiExport::post_class_unload(Klass* klass) {
1322 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) {
1323 return;
1324 }
1325 Thread *thread = Thread::current();
1326 HandleMark hm(thread);
1327
1328 EVT_TRIG_TRACE(EXT_EVENT_CLASS_UNLOAD, ("[?] Trg Class Unload triggered" ));
1329 if (JvmtiEventController::is_enabled((jvmtiEvent)EXT_EVENT_CLASS_UNLOAD)) {
1330 assert(thread->is_VM_thread(), "wrong thread");
1331
1332 // get JavaThread for whom we are proxy
1333 Thread *calling_thread = ((VMThread *)thread)->vm_operation()->calling_thread();
1334 if (!calling_thread->is_Java_thread()) {
1335 // cannot post an event to a non-JavaThread
1336 return;
1337 }
1338 JavaThread *real_thread = (JavaThread *)calling_thread;
1339
1340 JvmtiEnvIterator it;
1341 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1342 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) {
1343 continue;
1344 }
1345 if (env->is_enabled((jvmtiEvent)EXT_EVENT_CLASS_UNLOAD)) {
1346 EVT_TRACE(EXT_EVENT_CLASS_UNLOAD, ("[?] Evt Class Unload sent %s",
1347 klass==NULL? "NULL" : klass->external_name() ));
1348
1349 // do everything manually, since this is a proxy - needs special care
1350 JNIEnv* jni_env = real_thread->jni_environment();
1351 jthread jt = (jthread)JNIHandles::make_local(real_thread, real_thread->threadObj());
1352 jclass jk = (jclass)JNIHandles::make_local(real_thread, klass->java_mirror());
1353
1354 // Before we call the JVMTI agent, we have to set the state in the
1355 // thread for which we are proxying.
1356 JavaThreadState prev_state = real_thread->thread_state();
1357 assert(((Thread *)real_thread)->is_ConcurrentGC_thread() ||
1358 (real_thread->is_Java_thread() && prev_state == _thread_blocked),
1359 "should be ConcurrentGCThread or JavaThread at safepoint");
1360 real_thread->set_thread_state(_thread_in_native);
1361
1362 jvmtiExtensionEvent callback = env->ext_callbacks()->ClassUnload;
1363 if (callback != NULL) {
1364 (*callback)(env->jvmti_external(), jni_env, jt, jk);
1365 }
1366
1367 assert(real_thread->thread_state() == _thread_in_native,
1368 "JavaThread should be in native");
1369 real_thread->set_thread_state(prev_state);
1370
1371 JNIHandles::destroy_local(jk);
1372 JNIHandles::destroy_local(jt);
1373 }
1374 }
1375 }
1376 }
1377
1378
1379 void JvmtiExport::post_thread_start(JavaThread *thread) {
1380 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) {
1381 return;
1382 }
1383 assert(thread->thread_state() == _thread_in_vm, "must be in vm state");
1384
1385 EVT_TRIG_TRACE(JVMTI_EVENT_THREAD_START, ("[%s] Trg Thread Start event triggered",
1386 JvmtiTrace::safe_get_thread_name(thread)));
1387
1388 // do JVMTI thread initialization (if needed)
1389 JvmtiEventController::thread_started(thread);
1390
1391 // Do not post thread start event for hidden java thread.
1392 if (JvmtiEventController::is_enabled(JVMTI_EVENT_THREAD_START) &&
1393 !thread->is_hidden_from_external_view()) {
1394 JvmtiEnvIterator it;
1395 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1396 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) {
1397 continue;
1398 }
1399 if (env->is_enabled(JVMTI_EVENT_THREAD_START)) {
1400 EVT_TRACE(JVMTI_EVENT_THREAD_START, ("[%s] Evt Thread Start event sent",
1401 JvmtiTrace::safe_get_thread_name(thread) ));
1402
1403 JvmtiThreadEventMark jem(thread);
1404 JvmtiJavaThreadEventTransition jet(thread);
1405 jvmtiEventThreadStart callback = env->callbacks()->ThreadStart;
1406 if (callback != NULL) {
1407 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread());
1408 }
1409 }
1410 }
1411 }
1412 }
1413
1414
1415 void JvmtiExport::post_thread_end(JavaThread *thread) {
1416 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) {
1417 return;
1418 }
1419 EVT_TRIG_TRACE(JVMTI_EVENT_THREAD_END, ("[%s] Trg Thread End event triggered",
1420 JvmtiTrace::safe_get_thread_name(thread)));
1421
1422 JvmtiThreadState *state = thread->jvmti_thread_state();
1423 if (state == NULL) {
1424 return;
1425 }
1426
1427 // Do not post thread end event for hidden java thread.
1428 if (state->is_enabled(JVMTI_EVENT_THREAD_END) &&
1429 !thread->is_hidden_from_external_view()) {
1430
1431 JvmtiEnvThreadStateIterator it(state);
1432 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1433 if (ets->is_enabled(JVMTI_EVENT_THREAD_END)) {
1434 JvmtiEnv *env = ets->get_env();
1435 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) {
1436 continue;
1437 }
1438 EVT_TRACE(JVMTI_EVENT_THREAD_END, ("[%s] Evt Thread End event sent",
1439 JvmtiTrace::safe_get_thread_name(thread) ));
1440
1441 JvmtiThreadEventMark jem(thread);
1442 JvmtiJavaThreadEventTransition jet(thread);
1443 jvmtiEventThreadEnd callback = env->callbacks()->ThreadEnd;
1444 if (callback != NULL) {
1445 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread());
1446 }
1447 }
1448 }
1449 }
1450 }
1451
1452 void JvmtiExport::post_object_free(JvmtiEnv* env, jlong tag) {
1453 assert(SafepointSynchronize::is_at_safepoint(), "must be executed at safepoint");
1454 assert(env->is_enabled(JVMTI_EVENT_OBJECT_FREE), "checking");
1455
1456 EVT_TRIG_TRACE(JVMTI_EVENT_OBJECT_FREE, ("[?] Trg Object Free triggered" ));
1457 EVT_TRACE(JVMTI_EVENT_OBJECT_FREE, ("[?] Evt Object Free sent"));
1458
1459 jvmtiEventObjectFree callback = env->callbacks()->ObjectFree;
1460 if (callback != NULL) {
1461 (*callback)(env->jvmti_external(), tag);
1462 }
1463 }
1464
1465 void JvmtiExport::post_resource_exhausted(jint resource_exhausted_flags, const char* description) {
1466 EVT_TRIG_TRACE(JVMTI_EVENT_RESOURCE_EXHAUSTED, ("Trg resource exhausted event triggered" ));
1467
1468 JvmtiEnvIterator it;
1469 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1470 if (env->is_enabled(JVMTI_EVENT_RESOURCE_EXHAUSTED)) {
1471 EVT_TRACE(JVMTI_EVENT_RESOURCE_EXHAUSTED, ("Evt resource exhausted event sent" ));
1472
1473 JavaThread *thread = JavaThread::current();
1474 JvmtiThreadEventMark jem(thread);
1475 JvmtiJavaThreadEventTransition jet(thread);
1476 jvmtiEventResourceExhausted callback = env->callbacks()->ResourceExhausted;
1477 if (callback != NULL) {
1478 (*callback)(env->jvmti_external(), jem.jni_env(),
1479 resource_exhausted_flags, NULL, description);
1480 }
1481 }
1482 }
1483 }
1484
1485 void JvmtiExport::post_method_entry(JavaThread *thread, Method* method, frame current_frame) {
1486 HandleMark hm(thread);
1487 methodHandle mh(thread, method);
1488
1489 EVT_TRIG_TRACE(JVMTI_EVENT_METHOD_ENTRY, ("[%s] Trg Method Entry triggered %s.%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
1494 JvmtiThreadState* state = thread->jvmti_thread_state();
1495 if (state == NULL || !state->is_interp_only_mode()) {
1496 // for any thread that actually wants method entry, interp_only_mode is set
1497 return;
1498 }
1499
1500 state->incr_cur_stack_depth();
1501
1502 if (state->is_enabled(JVMTI_EVENT_METHOD_ENTRY)) {
1503 JvmtiEnvThreadStateIterator it(state);
1504 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1505 if (ets->is_enabled(JVMTI_EVENT_METHOD_ENTRY)) {
1506 EVT_TRACE(JVMTI_EVENT_METHOD_ENTRY, ("[%s] Evt Method Entry sent %s.%s",
1507 JvmtiTrace::safe_get_thread_name(thread),
1508 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1509 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1510
1511 JvmtiEnv *env = ets->get_env();
1512 JvmtiMethodEventMark jem(thread, mh);
1513 JvmtiJavaThreadEventTransition jet(thread);
1514 jvmtiEventMethodEntry callback = env->callbacks()->MethodEntry;
1515 if (callback != NULL) {
1516 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_methodID());
1517 }
1518 }
1519 }
1520 }
1521 }
1522
1523 void JvmtiExport::post_method_exit(JavaThread *thread, Method* method, frame current_frame) {
1524 HandleMark hm(thread);
1525 methodHandle mh(thread, method);
1526
1527 EVT_TRIG_TRACE(JVMTI_EVENT_METHOD_EXIT, ("[%s] Trg Method Exit triggered %s.%s",
1528 JvmtiTrace::safe_get_thread_name(thread),
1529 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1530 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1531
1532 JvmtiThreadState *state = thread->jvmti_thread_state();
1533 if (state == NULL || !state->is_interp_only_mode()) {
1534 // for any thread that actually wants method exit, interp_only_mode is set
1535 return;
1536 }
1537
1538 // return a flag when a method terminates by throwing an exception
1539 // i.e. if an exception is thrown and it's not caught by the current method
1540 bool exception_exit = state->is_exception_detected() && !state->is_exception_caught();
1541
1542
1543 if (state->is_enabled(JVMTI_EVENT_METHOD_EXIT)) {
1544 Handle result;
1545 jvalue value;
1546 value.j = 0L;
1547
1548 // if the method hasn't been popped because of an exception then we populate
1549 // the return_value parameter for the callback. At this point we only have
1550 // the address of a "raw result" and we just call into the interpreter to
1551 // convert this into a jvalue.
1552 if (!exception_exit) {
1553 oop oop_result;
1554 BasicType type = current_frame.interpreter_frame_result(&oop_result, &value);
1555 if (type == T_OBJECT || type == T_ARRAY) {
1556 result = Handle(thread, oop_result);
1557 }
1558 }
1559
1560 JvmtiEnvThreadStateIterator it(state);
1561 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1562 if (ets->is_enabled(JVMTI_EVENT_METHOD_EXIT)) {
1563 EVT_TRACE(JVMTI_EVENT_METHOD_EXIT, ("[%s] Evt Method Exit sent %s.%s",
1564 JvmtiTrace::safe_get_thread_name(thread),
1565 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1566 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1567
1568 JvmtiEnv *env = ets->get_env();
1569 JvmtiMethodEventMark jem(thread, mh);
1570 if (result.not_null()) {
1571 value.l = JNIHandles::make_local(thread, result());
1572 }
1573 JvmtiJavaThreadEventTransition jet(thread);
1574 jvmtiEventMethodExit callback = env->callbacks()->MethodExit;
1575 if (callback != NULL) {
1576 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1577 jem.jni_methodID(), exception_exit, value);
1578 }
1579 }
1580 }
1581 }
1582
1583 if (state->is_enabled(JVMTI_EVENT_FRAME_POP)) {
1584 JvmtiEnvThreadStateIterator it(state);
1585 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1586 int cur_frame_number = state->cur_stack_depth();
1587
1588 if (ets->is_frame_pop(cur_frame_number)) {
1589 // we have a NotifyFramePop entry for this frame.
1590 // now check that this env/thread wants this event
1591 if (ets->is_enabled(JVMTI_EVENT_FRAME_POP)) {
1592 EVT_TRACE(JVMTI_EVENT_FRAME_POP, ("[%s] Evt Frame Pop sent %s.%s",
1593 JvmtiTrace::safe_get_thread_name(thread),
1594 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1595 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1596
1597 // we also need to issue a frame pop event for this frame
1598 JvmtiEnv *env = ets->get_env();
1599 JvmtiMethodEventMark jem(thread, mh);
1600 JvmtiJavaThreadEventTransition jet(thread);
1601 jvmtiEventFramePop callback = env->callbacks()->FramePop;
1602 if (callback != NULL) {
1603 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1604 jem.jni_methodID(), exception_exit);
1605 }
1606 }
1607 // remove the frame's entry
1608 ets->clear_frame_pop(cur_frame_number);
1609 }
1610 }
1611 }
1612
1613 state->decr_cur_stack_depth();
1614 }
1615
1616
1617 // Todo: inline this for optimization
1618 void JvmtiExport::post_single_step(JavaThread *thread, Method* method, address location) {
1619 HandleMark hm(thread);
1620 methodHandle mh(thread, method);
1621
1622 JvmtiThreadState *state = thread->jvmti_thread_state();
1623 if (state == NULL) {
1624 return;
1625 }
1626 JvmtiEnvThreadStateIterator it(state);
1627 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1628 ets->compare_and_set_current_location(mh(), location, JVMTI_EVENT_SINGLE_STEP);
1629 if (!ets->single_stepping_posted() && ets->is_enabled(JVMTI_EVENT_SINGLE_STEP)) {
1630 EVT_TRACE(JVMTI_EVENT_SINGLE_STEP, ("[%s] Evt Single Step sent %s.%s @ " INTX_FORMAT,
1631 JvmtiTrace::safe_get_thread_name(thread),
1632 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1633 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1634 location - mh()->code_base() ));
1635
1636 JvmtiEnv *env = ets->get_env();
1637 JvmtiLocationEventMark jem(thread, mh, location);
1638 JvmtiJavaThreadEventTransition jet(thread);
1639 jvmtiEventSingleStep callback = env->callbacks()->SingleStep;
1640 if (callback != NULL) {
1641 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1642 jem.jni_methodID(), jem.location());
1643 }
1644
1645 ets->set_single_stepping_posted();
1646 }
1647 }
1648 }
1649
1650 void JvmtiExport::post_exception_throw(JavaThread *thread, Method* method, address location, oop exception) {
1651 HandleMark hm(thread);
1652 methodHandle mh(thread, method);
1653 Handle exception_handle(thread, exception);
1654
1655 JvmtiThreadState *state = thread->jvmti_thread_state();
1656 if (state == NULL) {
1657 return;
1658 }
1659
1660 EVT_TRIG_TRACE(JVMTI_EVENT_EXCEPTION, ("[%s] Trg Exception thrown triggered",
1661 JvmtiTrace::safe_get_thread_name(thread)));
1662 if (!state->is_exception_detected()) {
1663 state->set_exception_detected();
1664 JvmtiEnvThreadStateIterator it(state);
1665 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1666 if (ets->is_enabled(JVMTI_EVENT_EXCEPTION) && (exception != NULL)) {
1667
1668 EVT_TRACE(JVMTI_EVENT_EXCEPTION,
1669 ("[%s] Evt Exception thrown sent %s.%s @ " INTX_FORMAT,
1670 JvmtiTrace::safe_get_thread_name(thread),
1671 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1672 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1673 location - mh()->code_base() ));
1674
1675 JvmtiEnv *env = ets->get_env();
1676 JvmtiExceptionEventMark jem(thread, mh, location, exception_handle);
1677
1678 // It's okay to clear these exceptions here because we duplicate
1679 // this lookup in InterpreterRuntime::exception_handler_for_exception.
1680 EXCEPTION_MARK;
1681
1682 bool should_repeat;
1683 vframeStream st(thread);
1684 assert(!st.at_end(), "cannot be at end");
1685 Method* current_method = NULL;
1686 // A GC may occur during the Method::fast_exception_handler_bci_for()
1687 // call below if it needs to load the constraint class. Using a
1688 // methodHandle to keep the 'current_method' from being deallocated
1689 // if GC happens.
1690 methodHandle current_mh = methodHandle(thread, current_method);
1691 int current_bci = -1;
1692 do {
1693 current_method = st.method();
1694 current_mh = methodHandle(thread, current_method);
1695 current_bci = st.bci();
1696 do {
1697 should_repeat = false;
1698 Klass* eh_klass = exception_handle()->klass();
1699 current_bci = Method::fast_exception_handler_bci_for(
1700 current_mh, eh_klass, current_bci, THREAD);
1701 if (HAS_PENDING_EXCEPTION) {
1702 exception_handle = Handle(thread, PENDING_EXCEPTION);
1703 CLEAR_PENDING_EXCEPTION;
1704 should_repeat = true;
1705 }
1706 } while (should_repeat && (current_bci != -1));
1707 st.next();
1708 } while ((current_bci < 0) && (!st.at_end()));
1709
1710 jmethodID catch_jmethodID;
1711 if (current_bci < 0) {
1712 catch_jmethodID = 0;
1713 current_bci = 0;
1714 } else {
1715 catch_jmethodID = jem.to_jmethodID(current_mh);
1716 }
1717
1718 JvmtiJavaThreadEventTransition jet(thread);
1719 jvmtiEventException callback = env->callbacks()->Exception;
1720 if (callback != NULL) {
1721 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1722 jem.jni_methodID(), jem.location(),
1723 jem.exception(),
1724 catch_jmethodID, current_bci);
1725 }
1726 }
1727 }
1728 }
1729
1730 // frames may get popped because of this throw, be safe - invalidate cached depth
1731 state->invalidate_cur_stack_depth();
1732 }
1733
1734
1735 void JvmtiExport::notice_unwind_due_to_exception(JavaThread *thread, Method* method, address location, oop exception, bool in_handler_frame) {
1736 HandleMark hm(thread);
1737 methodHandle mh(thread, method);
1738 Handle exception_handle(thread, exception);
1739
1740 JvmtiThreadState *state = thread->jvmti_thread_state();
1741 if (state == NULL) {
1742 return;
1743 }
1744 EVT_TRIG_TRACE(JVMTI_EVENT_EXCEPTION_CATCH,
1745 ("[%s] Trg unwind_due_to_exception triggered %s.%s @ %s" INTX_FORMAT " - %s",
1746 JvmtiTrace::safe_get_thread_name(thread),
1747 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1748 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1749 location==0? "no location:" : "",
1750 location==0? 0 : location - mh()->code_base(),
1751 in_handler_frame? "in handler frame" : "not handler frame" ));
1752
1753 if (state->is_exception_detected()) {
1754
1755 state->invalidate_cur_stack_depth();
1756 if (!in_handler_frame) {
1757 // Not in exception handler.
1758 if(state->is_interp_only_mode()) {
1759 // method exit and frame pop events are posted only in interp mode.
1760 // When these events are enabled code should be in running in interp mode.
1761 JvmtiExport::post_method_exit(thread, method, thread->last_frame());
1762 // The cached cur_stack_depth might have changed from the
1763 // operations of frame pop or method exit. We are not 100% sure
1764 // the cached cur_stack_depth is still valid depth so invalidate
1765 // it.
1766 state->invalidate_cur_stack_depth();
1767 }
1768 } else {
1769 // In exception handler frame. Report exception catch.
1770 assert(location != NULL, "must be a known location");
1771 // Update cur_stack_depth - the frames above the current frame
1772 // have been unwound due to this exception:
1773 assert(!state->is_exception_caught(), "exception must not be caught yet.");
1774 state->set_exception_caught();
1775
1776 JvmtiEnvThreadStateIterator it(state);
1777 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1778 if (ets->is_enabled(JVMTI_EVENT_EXCEPTION_CATCH) && (exception_handle() != NULL)) {
1779 EVT_TRACE(JVMTI_EVENT_EXCEPTION_CATCH,
1780 ("[%s] Evt ExceptionCatch sent %s.%s @ " INTX_FORMAT,
1781 JvmtiTrace::safe_get_thread_name(thread),
1782 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1783 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1784 location - mh()->code_base() ));
1785
1786 JvmtiEnv *env = ets->get_env();
1787 JvmtiExceptionEventMark jem(thread, mh, location, exception_handle);
1788 JvmtiJavaThreadEventTransition jet(thread);
1789 jvmtiEventExceptionCatch callback = env->callbacks()->ExceptionCatch;
1790 if (callback != NULL) {
1791 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1792 jem.jni_methodID(), jem.location(),
1793 jem.exception());
1794 }
1795 }
1796 }
1797 }
1798 }
1799 }
1800
1801 oop JvmtiExport::jni_GetField_probe(JavaThread *thread, jobject jobj, oop obj,
1802 Klass* klass, jfieldID fieldID, bool is_static) {
1803 if (*((int *)get_field_access_count_addr()) > 0 && thread->has_last_Java_frame()) {
1804 // At least one field access watch is set so we have more work
1805 // to do. This wrapper is used by entry points that allow us
1806 // to create handles in post_field_access_by_jni().
1807 post_field_access_by_jni(thread, obj, klass, fieldID, is_static);
1808 // event posting can block so refetch oop if we were passed a jobj
1809 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj);
1810 }
1811 return obj;
1812 }
1813
1814 oop JvmtiExport::jni_GetField_probe_nh(JavaThread *thread, jobject jobj, oop obj,
1815 Klass* klass, jfieldID fieldID, bool is_static) {
1816 if (*((int *)get_field_access_count_addr()) > 0 && thread->has_last_Java_frame()) {
1817 // At least one field access watch is set so we have more work
1818 // to do. This wrapper is used by "quick" entry points that don't
1819 // allow us to create handles in post_field_access_by_jni(). We
1820 // override that with a ResetNoHandleMark.
1821 ResetNoHandleMark rnhm;
1822 post_field_access_by_jni(thread, obj, klass, fieldID, is_static);
1823 // event posting can block so refetch oop if we were passed a jobj
1824 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj);
1825 }
1826 return obj;
1827 }
1828
1829 void JvmtiExport::post_field_access_by_jni(JavaThread *thread, oop obj,
1830 Klass* klass, jfieldID fieldID, bool is_static) {
1831 // We must be called with a Java context in order to provide reasonable
1832 // values for the klazz, method, and location fields. The callers of this
1833 // function don't make the call unless there is a Java context.
1834 assert(thread->has_last_Java_frame(), "must be called with a Java context");
1835
1836 ResourceMark rm;
1837 fieldDescriptor fd;
1838 // if get_field_descriptor finds fieldID to be invalid, then we just bail
1839 bool valid_fieldID = JvmtiEnv::get_field_descriptor(klass, fieldID, &fd);
1840 assert(valid_fieldID == true,"post_field_access_by_jni called with invalid fieldID");
1841 if (!valid_fieldID) return;
1842 // field accesses are not watched so bail
1843 if (!fd.is_field_access_watched()) return;
1844
1845 HandleMark hm(thread);
1846 Handle h_obj;
1847 if (!is_static) {
1848 // non-static field accessors have an object, but we need a handle
1849 assert(obj != NULL, "non-static needs an object");
1850 h_obj = Handle(thread, obj);
1851 }
1852 post_field_access(thread,
1853 thread->last_frame().interpreter_frame_method(),
1854 thread->last_frame().interpreter_frame_bcp(),
1855 klass, h_obj, fieldID);
1856 }
1857
1858 void JvmtiExport::post_field_access(JavaThread *thread, Method* method,
1859 address location, Klass* field_klass, Handle object, jfieldID field) {
1860
1861 HandleMark hm(thread);
1862 methodHandle mh(thread, method);
1863
1864 JvmtiThreadState *state = thread->jvmti_thread_state();
1865 if (state == NULL) {
1866 return;
1867 }
1868 EVT_TRIG_TRACE(JVMTI_EVENT_FIELD_ACCESS, ("[%s] Trg Field Access event triggered",
1869 JvmtiTrace::safe_get_thread_name(thread)));
1870 JvmtiEnvThreadStateIterator it(state);
1871 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1872 if (ets->is_enabled(JVMTI_EVENT_FIELD_ACCESS)) {
1873 EVT_TRACE(JVMTI_EVENT_FIELD_ACCESS, ("[%s] Evt Field Access event sent %s.%s @ " INTX_FORMAT,
1874 JvmtiTrace::safe_get_thread_name(thread),
1875 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1876 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1877 location - mh()->code_base() ));
1878
1879 JvmtiEnv *env = ets->get_env();
1880 JvmtiLocationEventMark jem(thread, mh, location);
1881 jclass field_jclass = jem.to_jclass(field_klass);
1882 jobject field_jobject = jem.to_jobject(object());
1883 JvmtiJavaThreadEventTransition jet(thread);
1884 jvmtiEventFieldAccess callback = env->callbacks()->FieldAccess;
1885 if (callback != NULL) {
1886 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1887 jem.jni_methodID(), jem.location(),
1888 field_jclass, field_jobject, field);
1889 }
1890 }
1891 }
1892 }
1893
1894 oop JvmtiExport::jni_SetField_probe(JavaThread *thread, jobject jobj, oop obj,
1895 Klass* klass, jfieldID fieldID, bool is_static,
1896 char sig_type, jvalue *value) {
1897 if (*((int *)get_field_modification_count_addr()) > 0 && thread->has_last_Java_frame()) {
1898 // At least one field modification watch is set so we have more work
1899 // to do. This wrapper is used by entry points that allow us
1900 // to create handles in post_field_modification_by_jni().
1901 post_field_modification_by_jni(thread, obj, klass, fieldID, is_static, sig_type, value);
1902 // event posting can block so refetch oop if we were passed a jobj
1903 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj);
1904 }
1905 return obj;
1906 }
1907
1908 oop JvmtiExport::jni_SetField_probe_nh(JavaThread *thread, jobject jobj, oop obj,
1909 Klass* klass, jfieldID fieldID, bool is_static,
1910 char sig_type, jvalue *value) {
1911 if (*((int *)get_field_modification_count_addr()) > 0 && thread->has_last_Java_frame()) {
1912 // At least one field modification watch is set so we have more work
1913 // to do. This wrapper is used by "quick" entry points that don't
1914 // allow us to create handles in post_field_modification_by_jni(). We
1915 // override that with a ResetNoHandleMark.
1916 ResetNoHandleMark rnhm;
1917 post_field_modification_by_jni(thread, obj, klass, fieldID, is_static, sig_type, value);
1918 // event posting can block so refetch oop if we were passed a jobj
1919 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj);
1920 }
1921 return obj;
1922 }
1923
1924 void JvmtiExport::post_field_modification_by_jni(JavaThread *thread, oop obj,
1925 Klass* klass, jfieldID fieldID, bool is_static,
1926 char sig_type, jvalue *value) {
1927 // We must be called with a Java context in order to provide reasonable
1928 // values for the klazz, method, and location fields. The callers of this
1929 // function don't make the call unless there is a Java context.
1930 assert(thread->has_last_Java_frame(), "must be called with Java context");
1931
1932 ResourceMark rm;
1933 fieldDescriptor fd;
1934 // if get_field_descriptor finds fieldID to be invalid, then we just bail
1935 bool valid_fieldID = JvmtiEnv::get_field_descriptor(klass, fieldID, &fd);
1936 assert(valid_fieldID == true,"post_field_modification_by_jni called with invalid fieldID");
1937 if (!valid_fieldID) return;
1938 // field modifications are not watched so bail
1939 if (!fd.is_field_modification_watched()) return;
1940
1941 HandleMark hm(thread);
1942
1943 Handle h_obj;
1944 if (!is_static) {
1945 // non-static field accessors have an object, but we need a handle
1946 assert(obj != NULL, "non-static needs an object");
1947 h_obj = Handle(thread, obj);
1948 }
1949 post_field_modification(thread,
1950 thread->last_frame().interpreter_frame_method(),
1951 thread->last_frame().interpreter_frame_bcp(),
1952 klass, h_obj, fieldID, sig_type, value);
1953 }
1954
1955 void JvmtiExport::post_raw_field_modification(JavaThread *thread, Method* method,
1956 address location, Klass* field_klass, Handle object, jfieldID field,
1957 char sig_type, jvalue *value) {
1958
1959 if (sig_type == 'I' || sig_type == 'Z' || sig_type == 'B' || sig_type == 'C' || sig_type == 'S') {
1960 // 'I' instructions are used for byte, char, short and int.
1961 // determine which it really is, and convert
1962 fieldDescriptor fd;
1963 bool found = JvmtiEnv::get_field_descriptor(field_klass, field, &fd);
1964 // should be found (if not, leave as is)
1965 if (found) {
1966 jint ival = value->i;
1967 // convert value from int to appropriate type
1968 switch (fd.field_type()) {
1969 case T_BOOLEAN:
1970 sig_type = 'Z';
1971 value->i = 0; // clear it
1972 value->z = (jboolean)ival;
1973 break;
1974 case T_BYTE:
1975 sig_type = 'B';
1976 value->i = 0; // clear it
1977 value->b = (jbyte)ival;
1978 break;
1979 case T_CHAR:
1980 sig_type = 'C';
1981 value->i = 0; // clear it
1982 value->c = (jchar)ival;
1983 break;
1984 case T_SHORT:
1985 sig_type = 'S';
1986 value->i = 0; // clear it
1987 value->s = (jshort)ival;
1988 break;
1989 case T_INT:
1990 // nothing to do
1991 break;
1992 default:
1993 // this is an integer instruction, should be one of above
1994 ShouldNotReachHere();
1995 break;
1996 }
1997 }
1998 }
1999
2000 assert(sig_type != '[', "array should have sig_type == 'L'");
2001 bool handle_created = false;
2002
2003 // convert oop to JNI handle.
2004 if (sig_type == 'L') {
2005 handle_created = true;
2006 value->l = (jobject)JNIHandles::make_local(thread, (oop)value->l);
2007 }
2008
2009 post_field_modification(thread, method, location, field_klass, object, field, sig_type, value);
2010
2011 // Destroy the JNI handle allocated above.
2012 if (handle_created) {
2013 JNIHandles::destroy_local(value->l);
2014 }
2015 }
2016
2017 void JvmtiExport::post_field_modification(JavaThread *thread, Method* method,
2018 address location, Klass* field_klass, Handle object, jfieldID field,
2019 char sig_type, jvalue *value_ptr) {
2020
2021 HandleMark hm(thread);
2022 methodHandle mh(thread, method);
2023
2024 JvmtiThreadState *state = thread->jvmti_thread_state();
2025 if (state == NULL) {
2026 return;
2027 }
2028 EVT_TRIG_TRACE(JVMTI_EVENT_FIELD_MODIFICATION,
2029 ("[%s] Trg Field Modification event triggered",
2030 JvmtiTrace::safe_get_thread_name(thread)));
2031
2032 JvmtiEnvThreadStateIterator it(state);
2033 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
2034 if (ets->is_enabled(JVMTI_EVENT_FIELD_MODIFICATION)) {
2035 EVT_TRACE(JVMTI_EVENT_FIELD_MODIFICATION,
2036 ("[%s] Evt Field Modification event sent %s.%s @ " INTX_FORMAT,
2037 JvmtiTrace::safe_get_thread_name(thread),
2038 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
2039 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
2040 location - mh()->code_base() ));
2041
2042 JvmtiEnv *env = ets->get_env();
2043 JvmtiLocationEventMark jem(thread, mh, location);
2044 jclass field_jclass = jem.to_jclass(field_klass);
2045 jobject field_jobject = jem.to_jobject(object());
2046 JvmtiJavaThreadEventTransition jet(thread);
2047 jvmtiEventFieldModification callback = env->callbacks()->FieldModification;
2048 if (callback != NULL) {
2049 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
2050 jem.jni_methodID(), jem.location(),
2051 field_jclass, field_jobject, field, sig_type, *value_ptr);
2052 }
2053 }
2054 }
2055 }
2056
2057 void JvmtiExport::post_native_method_bind(Method* method, address* function_ptr) {
2058 JavaThread* thread = JavaThread::current();
2059 assert(thread->thread_state() == _thread_in_vm, "must be in vm state");
2060
2061 HandleMark hm(thread);
2062 methodHandle mh(thread, method);
2063
2064 EVT_TRIG_TRACE(JVMTI_EVENT_NATIVE_METHOD_BIND, ("[%s] Trg Native Method Bind event triggered",
2065 JvmtiTrace::safe_get_thread_name(thread)));
2066
2067 if (JvmtiEventController::is_enabled(JVMTI_EVENT_NATIVE_METHOD_BIND)) {
2068 JvmtiEnvIterator it;
2069 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
2070 if (env->is_enabled(JVMTI_EVENT_NATIVE_METHOD_BIND)) {
2071 EVT_TRACE(JVMTI_EVENT_NATIVE_METHOD_BIND, ("[%s] Evt Native Method Bind event sent",
2072 JvmtiTrace::safe_get_thread_name(thread) ));
2073
2074 JvmtiMethodEventMark jem(thread, mh);
2075 JvmtiJavaThreadEventTransition jet(thread);
2076 JNIEnv* jni_env = (env->phase() == JVMTI_PHASE_PRIMORDIAL) ? NULL : jem.jni_env();
2077 jvmtiEventNativeMethodBind callback = env->callbacks()->NativeMethodBind;
2078 if (callback != NULL) {
2079 (*callback)(env->jvmti_external(), jni_env, jem.jni_thread(),
2080 jem.jni_methodID(), (void*)(*function_ptr), (void**)function_ptr);
2081 }
2082 }
2083 }
2084 }
2085 }
2086
2087 // Returns a record containing inlining information for the given nmethod
2088 jvmtiCompiledMethodLoadInlineRecord* create_inline_record(nmethod* nm) {
2089 jint numstackframes = 0;
2090 jvmtiCompiledMethodLoadInlineRecord* record = (jvmtiCompiledMethodLoadInlineRecord*)NEW_RESOURCE_OBJ(jvmtiCompiledMethodLoadInlineRecord);
2091 record->header.kind = JVMTI_CMLR_INLINE_INFO;
2092 record->header.next = NULL;
2093 record->header.majorinfoversion = JVMTI_CMLR_MAJOR_VERSION_1;
2094 record->header.minorinfoversion = JVMTI_CMLR_MINOR_VERSION_0;
2095 record->numpcs = 0;
2096 for(PcDesc* p = nm->scopes_pcs_begin(); p < nm->scopes_pcs_end(); p++) {
2097 if(p->scope_decode_offset() == DebugInformationRecorder::serialized_null) continue;
2098 record->numpcs++;
2099 }
2100 record->pcinfo = (PCStackInfo*)(NEW_RESOURCE_ARRAY(PCStackInfo, record->numpcs));
2101 int scope = 0;
2102 for(PcDesc* p = nm->scopes_pcs_begin(); p < nm->scopes_pcs_end(); p++) {
2103 if(p->scope_decode_offset() == DebugInformationRecorder::serialized_null) continue;
2104 void* pc_address = (void*)p->real_pc(nm);
2105 assert(pc_address != NULL, "pc_address must be non-null");
2106 record->pcinfo[scope].pc = pc_address;
2107 numstackframes=0;
2108 for(ScopeDesc* sd = nm->scope_desc_at(p->real_pc(nm));sd != NULL;sd = sd->sender()) {
2109 numstackframes++;
2110 }
2111 assert(numstackframes != 0, "numstackframes must be nonzero.");
2112 record->pcinfo[scope].methods = (jmethodID *)NEW_RESOURCE_ARRAY(jmethodID, numstackframes);
2113 record->pcinfo[scope].bcis = (jint *)NEW_RESOURCE_ARRAY(jint, numstackframes);
2114 record->pcinfo[scope].numstackframes = numstackframes;
2115 int stackframe = 0;
2116 for(ScopeDesc* sd = nm->scope_desc_at(p->real_pc(nm));sd != NULL;sd = sd->sender()) {
2117 // 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()
2118 assert(sd->method() != NULL, "sd->method() cannot be null.");
2119 record->pcinfo[scope].methods[stackframe] = sd->method()->jmethod_id();
2120 record->pcinfo[scope].bcis[stackframe] = sd->bci();
2121 stackframe++;
2122 }
2123 scope++;
2124 }
2125 return record;
2126 }
2127
2128 void JvmtiExport::post_compiled_method_load(nmethod *nm) {
2129 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) {
2130 return;
2131 }
2132 JavaThread* thread = JavaThread::current();
2133
2134 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
2135 ("[%s] method compile load event triggered",
2136 JvmtiTrace::safe_get_thread_name(thread)));
2137
2138 JvmtiEnvIterator it;
2139 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
2140 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_LOAD)) {
2141 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) {
2142 continue;
2143 }
2144 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
2145 ("[%s] class compile method load event sent %s.%s ",
2146 JvmtiTrace::safe_get_thread_name(thread),
2147 (nm->method() == NULL) ? "NULL" : nm->method()->klass_name()->as_C_string(),
2148 (nm->method() == NULL) ? "NULL" : nm->method()->name()->as_C_string()));
2149 ResourceMark rm(thread);
2150 HandleMark hm(thread);
2151
2152 // Add inlining information
2153 jvmtiCompiledMethodLoadInlineRecord* inlinerecord = create_inline_record(nm);
2154 // Pass inlining information through the void pointer
2155 JvmtiCompiledMethodLoadEventMark jem(thread, nm, inlinerecord);
2156 JvmtiJavaThreadEventTransition jet(thread);
2157 jvmtiEventCompiledMethodLoad callback = env->callbacks()->CompiledMethodLoad;
2158 if (callback != NULL) {
2159 (*callback)(env->jvmti_external(), jem.jni_methodID(),
2160 jem.code_size(), jem.code_data(), jem.map_length(),
2161 jem.map(), jem.compile_info());
2162 }
2163 }
2164 }
2165 }
2166
2167
2168 // post a COMPILED_METHOD_LOAD event for a given environment
2169 void JvmtiExport::post_compiled_method_load(JvmtiEnv* env, const jmethodID method, const jint length,
2170 const void *code_begin, const jint map_length,
2171 const jvmtiAddrLocationMap* map)
2172 {
2173 if (env->phase() <= JVMTI_PHASE_PRIMORDIAL) {
2174 return;
2175 }
2176 JavaThread* thread = JavaThread::current();
2177 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
2178 ("[%s] method compile load event triggered (by GenerateEvents)",
2179 JvmtiTrace::safe_get_thread_name(thread)));
2180 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_LOAD)) {
2181
2182 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
2183 ("[%s] class compile method load event sent (by GenerateEvents), jmethodID=" PTR_FORMAT,
2184 JvmtiTrace::safe_get_thread_name(thread), p2i(method)));
2185
2186 JvmtiEventMark jem(thread);
2187 JvmtiJavaThreadEventTransition jet(thread);
2188 jvmtiEventCompiledMethodLoad callback = env->callbacks()->CompiledMethodLoad;
2189 if (callback != NULL) {
2190 (*callback)(env->jvmti_external(), method,
2191 length, code_begin, map_length,
2192 map, NULL);
2193 }
2194 }
2195 }
2196
2197 void JvmtiExport::post_dynamic_code_generated_internal(const char *name, const void *code_begin, const void *code_end) {
2198 assert(name != NULL && name[0] != '\0', "sanity check");
2199
2200 JavaThread* thread = JavaThread::current();
2201 // In theory everyone coming thru here is in_vm but we need to be certain
2202 // because a callee will do a vm->native transition
2203 ThreadInVMfromUnknown __tiv;
2204
2205 EVT_TRIG_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED,
2206 ("[%s] method dynamic code generated event triggered",
2207 JvmtiTrace::safe_get_thread_name(thread)));
2208 JvmtiEnvIterator it;
2209 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
2210 if (env->is_enabled(JVMTI_EVENT_DYNAMIC_CODE_GENERATED)) {
2211 EVT_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED,
2212 ("[%s] dynamic code generated event sent for %s",
2213 JvmtiTrace::safe_get_thread_name(thread), name));
2214 JvmtiEventMark jem(thread);
2215 JvmtiJavaThreadEventTransition jet(thread);
2216 jint length = (jint)pointer_delta(code_end, code_begin, sizeof(char));
2217 jvmtiEventDynamicCodeGenerated callback = env->callbacks()->DynamicCodeGenerated;
2218 if (callback != NULL) {
2219 (*callback)(env->jvmti_external(), name, (void*)code_begin, length);
2220 }
2221 }
2222 }
2223 }
2224
2225 void JvmtiExport::post_dynamic_code_generated(const char *name, const void *code_begin, const void *code_end) {
2226 jvmtiPhase phase = JvmtiEnv::get_phase();
2227 if (phase == JVMTI_PHASE_PRIMORDIAL || phase == JVMTI_PHASE_START) {
2228 post_dynamic_code_generated_internal(name, code_begin, code_end);
2229 } else {
2230 // It may not be safe to post the event from this thread. Defer all
2231 // postings to the service thread so that it can perform them in a safe
2232 // context and in-order.
2233 MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag);
2234 JvmtiDeferredEvent event = JvmtiDeferredEvent::dynamic_code_generated_event(
2235 name, code_begin, code_end);
2236 JvmtiDeferredEventQueue::enqueue(event);
2237 }
2238 }
2239
2240
2241 // post a DYNAMIC_CODE_GENERATED event for a given environment
2242 // used by GenerateEvents
2243 void JvmtiExport::post_dynamic_code_generated(JvmtiEnv* env, const char *name,
2244 const void *code_begin, const void *code_end)
2245 {
2246 JavaThread* thread = JavaThread::current();
2247 EVT_TRIG_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED,
2248 ("[%s] dynamic code generated event triggered (by GenerateEvents)",
2249 JvmtiTrace::safe_get_thread_name(thread)));
2250 if (env->is_enabled(JVMTI_EVENT_DYNAMIC_CODE_GENERATED)) {
2251 EVT_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED,
2252 ("[%s] dynamic code generated event sent for %s",
2253 JvmtiTrace::safe_get_thread_name(thread), name));
2254 JvmtiEventMark jem(thread);
2255 JvmtiJavaThreadEventTransition jet(thread);
2256 jint length = (jint)pointer_delta(code_end, code_begin, sizeof(char));
2257 jvmtiEventDynamicCodeGenerated callback = env->callbacks()->DynamicCodeGenerated;
2258 if (callback != NULL) {
2259 (*callback)(env->jvmti_external(), name, (void*)code_begin, length);
2260 }
2261 }
2262 }
2263
2264 // post a DynamicCodeGenerated event while holding locks in the VM.
2265 void JvmtiExport::post_dynamic_code_generated_while_holding_locks(const char* name,
2266 address code_begin, address code_end)
2267 {
2268 // register the stub with the current dynamic code event collector
2269 JvmtiThreadState* state = JvmtiThreadState::state_for(JavaThread::current());
2270 // state can only be NULL if the current thread is exiting which
2271 // should not happen since we're trying to post an event
2272 guarantee(state != NULL, "attempt to register stub via an exiting thread");
2273 JvmtiDynamicCodeEventCollector* collector = state->get_dynamic_code_event_collector();
2274 guarantee(collector != NULL, "attempt to register stub without event collector");
2275 collector->register_stub(name, code_begin, code_end);
2276 }
2277
2278 // Collect all the vm internally allocated objects which are visible to java world
2279 void JvmtiExport::record_vm_internal_object_allocation(oop obj) {
2280 Thread* thread = Thread::current_or_null();
2281 if (thread != NULL && thread->is_Java_thread()) {
2282 // Can not take safepoint here.
2283 NoSafepointVerifier no_sfpt;
2284 // Can not take safepoint here so can not use state_for to get
2285 // jvmti thread state.
2286 JvmtiThreadState *state = ((JavaThread*)thread)->jvmti_thread_state();
2287 if (state != NULL ) {
2288 // state is non NULL when VMObjectAllocEventCollector is enabled.
2289 JvmtiVMObjectAllocEventCollector *collector;
2290 collector = state->get_vm_object_alloc_event_collector();
2291 if (collector != NULL && collector->is_enabled()) {
2292 // Don't record classes as these will be notified via the ClassLoad
2293 // event.
2294 if (obj->klass() != SystemDictionary::Class_klass()) {
2295 collector->record_allocation(obj);
2296 }
2297 }
2298 }
2299 }
2300 }
2301
2302 // Collect all the vm internally allocated objects which are visible to java world
2303 void JvmtiExport::record_sampled_internal_object_allocation(oop obj) {
2304 Thread* thread = Thread::current_or_null();
2305 if (thread != NULL && thread->is_Java_thread()) {
2306 // Can not take safepoint here.
2307 NoSafepointVerifier no_sfpt;
2308 // Can not take safepoint here so can not use state_for to get
2309 // jvmti thread state.
2310 JvmtiThreadState *state = ((JavaThread*)thread)->jvmti_thread_state();
2311 if (state != NULL ) {
2312 // state is non NULL when SampledObjectAllocEventCollector is enabled.
2313 JvmtiSampledObjectAllocEventCollector *collector;
2314 collector = state->get_sampled_object_alloc_event_collector();
2315 if (collector != NULL && collector->is_enabled()) {
2316 collector->record_allocation(obj);
2317 }
2318 }
2319 }
2320 }
2321
2322 void JvmtiExport::post_garbage_collection_finish() {
2323 Thread *thread = Thread::current(); // this event is posted from VM-Thread.
2324 EVT_TRIG_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH,
2325 ("[%s] garbage collection finish event triggered",
2326 JvmtiTrace::safe_get_thread_name(thread)));
2327 JvmtiEnvIterator it;
2328 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
2329 if (env->is_enabled(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH)) {
2330 EVT_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH,
2331 ("[%s] garbage collection finish event sent",
2332 JvmtiTrace::safe_get_thread_name(thread)));
2333 JvmtiThreadEventTransition jet(thread);
2334 // JNIEnv is NULL here because this event is posted from VM Thread
2335 jvmtiEventGarbageCollectionFinish callback = env->callbacks()->GarbageCollectionFinish;
2336 if (callback != NULL) {
2337 (*callback)(env->jvmti_external());
2338 }
2339 }
2340 }
2341 }
2342
2343 void JvmtiExport::post_garbage_collection_start() {
2344 Thread* thread = Thread::current(); // this event is posted from vm-thread.
2345 EVT_TRIG_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_START,
2346 ("[%s] garbage collection start event triggered",
2347 JvmtiTrace::safe_get_thread_name(thread)));
2348 JvmtiEnvIterator it;
2349 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
2350 if (env->is_enabled(JVMTI_EVENT_GARBAGE_COLLECTION_START)) {
2351 EVT_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_START,
2352 ("[%s] garbage collection start event sent",
2353 JvmtiTrace::safe_get_thread_name(thread)));
2354 JvmtiThreadEventTransition jet(thread);
2355 // JNIEnv is NULL here because this event is posted from VM Thread
2356 jvmtiEventGarbageCollectionStart callback = env->callbacks()->GarbageCollectionStart;
2357 if (callback != NULL) {
2358 (*callback)(env->jvmti_external());
2359 }
2360 }
2361 }
2362 }
2363
2364 void JvmtiExport::post_data_dump() {
2365 Thread *thread = Thread::current();
2366 EVT_TRIG_TRACE(JVMTI_EVENT_DATA_DUMP_REQUEST,
2367 ("[%s] data dump request event triggered",
2368 JvmtiTrace::safe_get_thread_name(thread)));
2369 JvmtiEnvIterator it;
2370 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
2371 if (env->is_enabled(JVMTI_EVENT_DATA_DUMP_REQUEST)) {
2372 EVT_TRACE(JVMTI_EVENT_DATA_DUMP_REQUEST,
2373 ("[%s] data dump request event sent",
2374 JvmtiTrace::safe_get_thread_name(thread)));
2375 JvmtiThreadEventTransition jet(thread);
2376 // JNIEnv is NULL here because this event is posted from VM Thread
2377 jvmtiEventDataDumpRequest callback = env->callbacks()->DataDumpRequest;
2378 if (callback != NULL) {
2379 (*callback)(env->jvmti_external());
2380 }
2381 }
2382 }
2383 }
2384
2385 void JvmtiExport::post_monitor_contended_enter(JavaThread *thread, ObjectMonitor *obj_mntr) {
2386 oop object = (oop)obj_mntr->object();
2387 JvmtiThreadState *state = thread->jvmti_thread_state();
2388 if (state == NULL) {
2389 return;
2390 }
2391
2392 HandleMark hm(thread);
2393 Handle h(thread, object);
2394
2395 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTER,
2396 ("[%s] montior contended enter event triggered",
2397 JvmtiTrace::safe_get_thread_name(thread)));
2398
2399 JvmtiEnvThreadStateIterator it(state);
2400 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
2401 if (ets->is_enabled(JVMTI_EVENT_MONITOR_CONTENDED_ENTER)) {
2402 EVT_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTER,
2403 ("[%s] monitor contended enter event sent",
2404 JvmtiTrace::safe_get_thread_name(thread)));
2405 JvmtiMonitorEventMark jem(thread, h());
2406 JvmtiEnv *env = ets->get_env();
2407 JvmtiThreadEventTransition jet(thread);
2408 jvmtiEventMonitorContendedEnter callback = env->callbacks()->MonitorContendedEnter;
2409 if (callback != NULL) {
2410 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_object());
2411 }
2412 }
2413 }
2414 }
2415
2416 void JvmtiExport::post_monitor_contended_entered(JavaThread *thread, ObjectMonitor *obj_mntr) {
2417 oop object = (oop)obj_mntr->object();
2418 JvmtiThreadState *state = thread->jvmti_thread_state();
2419 if (state == NULL) {
2420 return;
2421 }
2422
2423 HandleMark hm(thread);
2424 Handle h(thread, object);
2425
2426 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED,
2427 ("[%s] montior contended entered event triggered",
2428 JvmtiTrace::safe_get_thread_name(thread)));
2429
2430 JvmtiEnvThreadStateIterator it(state);
2431 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
2432 if (ets->is_enabled(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED)) {
2433 EVT_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED,
2434 ("[%s] monitor contended enter event sent",
2435 JvmtiTrace::safe_get_thread_name(thread)));
2436 JvmtiMonitorEventMark jem(thread, h());
2437 JvmtiEnv *env = ets->get_env();
2438 JvmtiThreadEventTransition jet(thread);
2439 jvmtiEventMonitorContendedEntered callback = env->callbacks()->MonitorContendedEntered;
2440 if (callback != NULL) {
2441 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_object());
2442 }
2443 }
2444 }
2445 }
2446
2447 void JvmtiExport::post_monitor_wait(JavaThread *thread, oop object,
2448 jlong timeout) {
2449 JvmtiThreadState *state = thread->jvmti_thread_state();
2450 if (state == NULL) {
2451 return;
2452 }
2453
2454 HandleMark hm(thread);
2455 Handle h(thread, object);
2456
2457 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_WAIT,
2458 ("[%s] montior wait event triggered",
2459 JvmtiTrace::safe_get_thread_name(thread)));
2460
2461 JvmtiEnvThreadStateIterator it(state);
2462 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
2463 if (ets->is_enabled(JVMTI_EVENT_MONITOR_WAIT)) {
2464 EVT_TRACE(JVMTI_EVENT_MONITOR_WAIT,
2465 ("[%s] monitor wait event sent",
2466 JvmtiTrace::safe_get_thread_name(thread)));
2467 JvmtiMonitorEventMark jem(thread, h());
2468 JvmtiEnv *env = ets->get_env();
2469 JvmtiThreadEventTransition jet(thread);
2470 jvmtiEventMonitorWait callback = env->callbacks()->MonitorWait;
2471 if (callback != NULL) {
2472 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
2473 jem.jni_object(), timeout);
2474 }
2475 }
2476 }
2477 }
2478
2479 void JvmtiExport::post_monitor_waited(JavaThread *thread, ObjectMonitor *obj_mntr, jboolean timed_out) {
2480 oop object = (oop)obj_mntr->object();
2481 JvmtiThreadState *state = thread->jvmti_thread_state();
2482 if (state == NULL) {
2483 return;
2484 }
2485
2486 HandleMark hm(thread);
2487 Handle h(thread, object);
2488
2489 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_WAITED,
2490 ("[%s] montior waited event triggered",
2491 JvmtiTrace::safe_get_thread_name(thread)));
2492
2493 JvmtiEnvThreadStateIterator it(state);
2494 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
2495 if (ets->is_enabled(JVMTI_EVENT_MONITOR_WAITED)) {
2496 EVT_TRACE(JVMTI_EVENT_MONITOR_WAITED,
2497 ("[%s] monitor waited event sent",
2498 JvmtiTrace::safe_get_thread_name(thread)));
2499 JvmtiMonitorEventMark jem(thread, h());
2500 JvmtiEnv *env = ets->get_env();
2501 JvmtiThreadEventTransition jet(thread);
2502 jvmtiEventMonitorWaited callback = env->callbacks()->MonitorWaited;
2503 if (callback != NULL) {
2504 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
2505 jem.jni_object(), timed_out);
2506 }
2507 }
2508 }
2509 }
2510
2511 void JvmtiExport::post_vm_object_alloc(JavaThread *thread, oop object) {
2512 EVT_TRIG_TRACE(JVMTI_EVENT_VM_OBJECT_ALLOC, ("[%s] Trg vm object alloc triggered",
2513 JvmtiTrace::safe_get_thread_name(thread)));
2514 if (object == NULL) {
2515 return;
2516 }
2517 HandleMark hm(thread);
2518 Handle h(thread, object);
2519 JvmtiEnvIterator it;
2520 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
2521 if (env->is_enabled(JVMTI_EVENT_VM_OBJECT_ALLOC)) {
2522 EVT_TRACE(JVMTI_EVENT_VM_OBJECT_ALLOC, ("[%s] Evt vmobject alloc sent %s",
2523 JvmtiTrace::safe_get_thread_name(thread),
2524 object==NULL? "NULL" : object->klass()->external_name()));
2525
2526 JvmtiObjectAllocEventMark jem(thread, h());
2527 JvmtiJavaThreadEventTransition jet(thread);
2528 jvmtiEventVMObjectAlloc callback = env->callbacks()->VMObjectAlloc;
2529 if (callback != NULL) {
2530 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
2531 jem.jni_jobject(), jem.jni_class(), jem.size());
2532 }
2533 }
2534 }
2535 }
2536
2537 void JvmtiExport::post_sampled_object_alloc(JavaThread *thread, oop object) {
2538 EVT_TRIG_TRACE(JVMTI_EVENT_SAMPLED_OBJECT_ALLOC,
2539 ("[%s] Trg sampled object alloc triggered",
2540 JvmtiTrace::safe_get_thread_name(thread)));
2541
2542 if (object == NULL) {
2543 return;
2544 }
2545
2546 HandleMark hm(thread);
2547 Handle h(thread, object);
2548
2549 JvmtiEnvIterator it;
2550 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
2551 if (env->is_enabled(JVMTI_EVENT_SAMPLED_OBJECT_ALLOC)) {
2552 EVT_TRACE(JVMTI_EVENT_SAMPLED_OBJECT_ALLOC,
2553 ("[%s] Evt sampled object alloc sent %s",
2554 JvmtiTrace::safe_get_thread_name(thread),
2555 object == NULL ? "NULL" : object->klass()->external_name()));
2556
2557 JvmtiObjectAllocEventMark jem(thread, h());
2558 JvmtiJavaThreadEventTransition jet(thread);
2559 jvmtiEventSampledObjectAlloc callback = env->callbacks()->SampledObjectAlloc;
2560 if (callback != NULL) {
2561 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
2562 jem.jni_jobject(), jem.jni_class(), jem.size());
2563 }
2564 }
2565 }
2566 }
2567
2568 ////////////////////////////////////////////////////////////////////////////////////////////////
2569
2570 void JvmtiExport::cleanup_thread(JavaThread* thread) {
2571 assert(JavaThread::current() == thread, "thread is not current");
2572 MutexLocker mu(JvmtiThreadState_lock);
2573
2574 if (thread->jvmti_thread_state() != NULL) {
2575 // This has to happen after the thread state is removed, which is
2576 // why it is not in post_thread_end_event like its complement
2577 // Maybe both these functions should be rolled into the posts?
2578 JvmtiEventController::thread_ended(thread);
2579 }
2580 }
2581
2582 void JvmtiExport::clear_detected_exception(JavaThread* thread) {
2583 assert(JavaThread::current() == thread, "thread is not current");
2584
2585 JvmtiThreadState* state = thread->jvmti_thread_state();
2586 if (state != NULL) {
2587 state->clear_exception_state();
2588 }
2589 }
2590
2591 void JvmtiExport::oops_do(OopClosure* f) {
2592 JvmtiCurrentBreakpoints::oops_do(f);
2593 JvmtiObjectAllocEventCollector::oops_do_for_all_threads(f);
2594 }
2595
2596 void JvmtiExport::weak_oops_do(BoolObjectClosure* is_alive, OopClosure* f) {
2597 JvmtiTagMap::weak_oops_do(is_alive, f);
2598 }
2599
2600 void JvmtiExport::gc_epilogue() {
2601 JvmtiCurrentBreakpoints::gc_epilogue();
2602 }
2603
2604 // Onload raw monitor transition.
2605 void JvmtiExport::transition_pending_onload_raw_monitors() {
2606 JvmtiPendingMonitors::transition_raw_monitors();
2607 }
2608
2609 ////////////////////////////////////////////////////////////////////////////////////////////////
2610 #if INCLUDE_SERVICES
2611 // Attach is disabled if SERVICES is not included
2612
2613 // type for the Agent_OnAttach entry point
2614 extern "C" {
2615 typedef jint (JNICALL *OnAttachEntry_t)(JavaVM*, char *, void *);
2616 }
2617
2618 jint JvmtiExport::load_agent_library(const char *agent, const char *absParam,
2619 const char *options, outputStream* st) {
2620 char ebuf[1024] = {0};
2621 char buffer[JVM_MAXPATHLEN];
2622 void* library = NULL;
2623 jint result = JNI_ERR;
2624 const char *on_attach_symbols[] = AGENT_ONATTACH_SYMBOLS;
2625 size_t num_symbol_entries = ARRAY_SIZE(on_attach_symbols);
2626
2627 // The abs paramter should be "true" or "false"
2628 bool is_absolute_path = (absParam != NULL) && (strcmp(absParam,"true")==0);
2629
2630 // Initially marked as invalid. It will be set to valid if we can find the agent
2631 AgentLibrary *agent_lib = new AgentLibrary(agent, options, is_absolute_path, NULL);
2632
2633 // Check for statically linked in agent. If not found then if the path is
2634 // absolute we attempt to load the library. Otherwise we try to load it
2635 // from the standard dll directory.
2636
2637 if (!os::find_builtin_agent(agent_lib, on_attach_symbols, num_symbol_entries)) {
2638 if (is_absolute_path) {
2639 library = os::dll_load(agent, ebuf, sizeof ebuf);
2640 } else {
2641 // Try to load the agent from the standard dll directory
2642 if (os::dll_locate_lib(buffer, sizeof(buffer), Arguments::get_dll_dir(),
2643 agent)) {
2644 library = os::dll_load(buffer, ebuf, sizeof ebuf);
2645 }
2646 if (library == NULL) {
2647 // not found - try OS default library path
2648 if (os::dll_build_name(buffer, sizeof(buffer), agent)) {
2649 library = os::dll_load(buffer, ebuf, sizeof ebuf);
2650 }
2651 }
2652 }
2653 if (library != NULL) {
2654 agent_lib->set_os_lib(library);
2655 agent_lib->set_valid();
2656 }
2657 }
2658 // If the library was loaded then we attempt to invoke the Agent_OnAttach
2659 // function
2660 if (agent_lib->valid()) {
2661 // Lookup the Agent_OnAttach function
2662 OnAttachEntry_t on_attach_entry = NULL;
2663 on_attach_entry = CAST_TO_FN_PTR(OnAttachEntry_t,
2664 os::find_agent_function(agent_lib, false, on_attach_symbols, num_symbol_entries));
2665 if (on_attach_entry == NULL) {
2666 // Agent_OnAttach missing - unload library
2667 if (!agent_lib->is_static_lib()) {
2668 os::dll_unload(library);
2669 }
2670 st->print_cr("%s is not available in %s",
2671 on_attach_symbols[0], agent_lib->name());
2672 delete agent_lib;
2673 } else {
2674 // Invoke the Agent_OnAttach function
2675 JavaThread* THREAD = JavaThread::current();
2676 {
2677 extern struct JavaVM_ main_vm;
2678 JvmtiThreadEventMark jem(THREAD);
2679 JvmtiJavaThreadEventTransition jet(THREAD);
2680
2681 result = (*on_attach_entry)(&main_vm, (char*)options, NULL);
2682 }
2683
2684 // Agent_OnAttach may have used JNI
2685 if (HAS_PENDING_EXCEPTION) {
2686 CLEAR_PENDING_EXCEPTION;
2687 }
2688
2689 // If OnAttach returns JNI_OK then we add it to the list of
2690 // agent libraries so that we can call Agent_OnUnload later.
2691 if (result == JNI_OK) {
2692 Arguments::add_loaded_agent(agent_lib);
2693 } else {
2694 delete agent_lib;
2695 }
2696
2697 // Agent_OnAttach executed so completion status is JNI_OK
2698 st->print_cr("return code: %d", result);
2699 result = JNI_OK;
2700 }
2701 } else {
2702 st->print_cr("%s was not loaded.", agent);
2703 if (*ebuf != '\0') {
2704 st->print_cr("%s", ebuf);
2705 }
2706 }
2707 return result;
2708 }
2709
2710 #endif // INCLUDE_SERVICES
2711 ////////////////////////////////////////////////////////////////////////////////////////////////
2712
2713 // Setup current current thread for event collection.
2714 void JvmtiEventCollector::setup_jvmti_thread_state() {
2715 // set this event collector to be the current one.
2716 JvmtiThreadState* state = JvmtiThreadState::state_for(JavaThread::current());
2717 // state can only be NULL if the current thread is exiting which
2718 // should not happen since we're trying to configure for event collection
2719 guarantee(state != NULL, "exiting thread called setup_jvmti_thread_state");
2720 if (is_vm_object_alloc_event()) {
2721 _prev = state->get_vm_object_alloc_event_collector();
2722 state->set_vm_object_alloc_event_collector((JvmtiVMObjectAllocEventCollector *)this);
2723 } else if (is_dynamic_code_event()) {
2724 _prev = state->get_dynamic_code_event_collector();
2725 state->set_dynamic_code_event_collector((JvmtiDynamicCodeEventCollector *)this);
2726 } else if (is_sampled_object_alloc_event()) {
2727 _prev = state->get_sampled_object_alloc_event_collector();
2728 state->set_sampled_object_alloc_event_collector((JvmtiSampledObjectAllocEventCollector*)this);
2729 }
2730 }
2731
2732 // Unset current event collection in this thread and reset it with previous
2733 // collector.
2734 void JvmtiEventCollector::unset_jvmti_thread_state() {
2735 JvmtiThreadState* state = JavaThread::current()->jvmti_thread_state();
2736 if (state != NULL) {
2737 // restore the previous event collector (if any)
2738 if (is_vm_object_alloc_event()) {
2739 if (state->get_vm_object_alloc_event_collector() == this) {
2740 state->set_vm_object_alloc_event_collector((JvmtiVMObjectAllocEventCollector *)_prev);
2741 } else {
2742 // this thread's jvmti state was created during the scope of
2743 // the event collector.
2744 }
2745 } else if (is_dynamic_code_event()) {
2746 if (state->get_dynamic_code_event_collector() == this) {
2747 state->set_dynamic_code_event_collector((JvmtiDynamicCodeEventCollector *)_prev);
2748 } else {
2749 // this thread's jvmti state was created during the scope of
2750 // the event collector.
2751 }
2752 } else if (is_sampled_object_alloc_event()) {
2753 if (state->get_sampled_object_alloc_event_collector() == this) {
2754 state->set_sampled_object_alloc_event_collector((JvmtiSampledObjectAllocEventCollector*)_prev);
2755 } else {
2756 // this thread's jvmti state was created during the scope of
2757 // the event collector.
2758 }
2759 }
2760 }
2761 }
2762
2763 // create the dynamic code event collector
2764 JvmtiDynamicCodeEventCollector::JvmtiDynamicCodeEventCollector() : _code_blobs(NULL) {
2765 if (JvmtiExport::should_post_dynamic_code_generated()) {
2766 setup_jvmti_thread_state();
2767 }
2768 }
2769
2770 // iterate over any code blob descriptors collected and post a
2771 // DYNAMIC_CODE_GENERATED event to the profiler.
2772 JvmtiDynamicCodeEventCollector::~JvmtiDynamicCodeEventCollector() {
2773 assert(!JavaThread::current()->owns_locks(), "all locks must be released to post deferred events");
2774 // iterate over any code blob descriptors that we collected
2775 if (_code_blobs != NULL) {
2776 for (int i=0; i<_code_blobs->length(); i++) {
2777 JvmtiCodeBlobDesc* blob = _code_blobs->at(i);
2778 JvmtiExport::post_dynamic_code_generated(blob->name(), blob->code_begin(), blob->code_end());
2779 FreeHeap(blob);
2780 }
2781 delete _code_blobs;
2782 }
2783 unset_jvmti_thread_state();
2784 }
2785
2786 // register a stub
2787 void JvmtiDynamicCodeEventCollector::register_stub(const char* name, address start, address end) {
2788 if (_code_blobs == NULL) {
2789 _code_blobs = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<JvmtiCodeBlobDesc*>(1,true);
2790 }
2791 _code_blobs->append(new JvmtiCodeBlobDesc(name, start, end));
2792 }
2793
2794 // Setup current thread to record vm allocated objects.
2795 JvmtiObjectAllocEventCollector::JvmtiObjectAllocEventCollector() :
2796 _allocated(NULL), _enable(false), _post_callback(NULL) {
2797 }
2798
2799 // Post vm_object_alloc event for vm allocated objects visible to java
2800 // world.
2801 void JvmtiObjectAllocEventCollector::generate_call_for_allocated() {
2802 if (_allocated != NULL) {
2803 set_enabled(false);
2804 for (int i = 0; i < _allocated->length(); i++) {
2805 oop obj = _allocated->at(i);
2806 _post_callback(JavaThread::current(), obj);
2807 }
2808 delete _allocated;
2809 }
2810 }
2811
2812 void JvmtiObjectAllocEventCollector::record_allocation(oop obj) {
2813 assert(is_enabled(), "Object alloc event collector is not enabled");
2814 if (_allocated == NULL) {
2815 _allocated = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<oop>(1, true);
2816 }
2817 _allocated->push(obj);
2818 }
2819
2820 // GC support.
2821 void JvmtiObjectAllocEventCollector::oops_do(OopClosure* f) {
2822 if (_allocated != NULL) {
2823 for(int i=_allocated->length() - 1; i >= 0; i--) {
2824 if (_allocated->at(i) != NULL) {
2825 f->do_oop(_allocated->adr_at(i));
2826 }
2827 }
2828 }
2829 }
2830
2831 void JvmtiObjectAllocEventCollector::oops_do_for_all_threads(OopClosure* f) {
2832 // no-op if jvmti not enabled
2833 if (!JvmtiEnv::environments_might_exist()) {
2834 return;
2835 }
2836
2837 for (JavaThreadIteratorWithHandle jtiwh; JavaThread *jthr = jtiwh.next(); ) {
2838 JvmtiThreadState *state = jthr->jvmti_thread_state();
2839 if (state != NULL) {
2840 JvmtiObjectAllocEventCollector *collector;
2841 collector = state->get_vm_object_alloc_event_collector();
2842 while (collector != NULL) {
2843 collector->oops_do(f);
2844 collector = (JvmtiObjectAllocEventCollector*) collector->get_prev();
2845 }
2846
2847 collector = state->get_sampled_object_alloc_event_collector();
2848 while (collector != NULL) {
2849 collector->oops_do(f);
2850 collector = (JvmtiObjectAllocEventCollector*) collector->get_prev();
2851 }
2852 }
2853 }
2854 }
2855
2856
2857 // Disable collection of VMObjectAlloc events
2858 NoJvmtiVMObjectAllocMark::NoJvmtiVMObjectAllocMark() : _collector(NULL) {
2859 // a no-op if VMObjectAlloc event is not enabled
2860 if (!JvmtiExport::should_post_vm_object_alloc()) {
2861 return;
2862 }
2863 Thread* thread = Thread::current_or_null();
2864 if (thread != NULL && thread->is_Java_thread()) {
2865 JavaThread* current_thread = (JavaThread*)thread;
2866 JvmtiThreadState *state = current_thread->jvmti_thread_state();
2867 if (state != NULL) {
2868 JvmtiVMObjectAllocEventCollector *collector;
2869 collector = state->get_vm_object_alloc_event_collector();
2870 if (collector != NULL && collector->is_enabled()) {
2871 _collector = collector;
2872 _collector->set_enabled(false);
2873 }
2874 }
2875 }
2876 }
2877
2878 // Re-Enable collection of VMObjectAlloc events (if previously enabled)
2879 NoJvmtiVMObjectAllocMark::~NoJvmtiVMObjectAllocMark() {
2880 if (was_enabled()) {
2881 _collector->set_enabled(true);
2882 }
2883 };
2884
2885 // Setup current thread to record vm allocated objects.
2886 JvmtiVMObjectAllocEventCollector::JvmtiVMObjectAllocEventCollector() {
2887 if (JvmtiExport::should_post_vm_object_alloc()) {
2888 _enable = true;
2889 _post_callback = JvmtiExport::post_vm_object_alloc;
2890 setup_jvmti_thread_state();
2891 }
2892 }
2893
2894 JvmtiVMObjectAllocEventCollector::~JvmtiVMObjectAllocEventCollector() {
2895 generate_call_for_allocated();
2896 unset_jvmti_thread_state();
2897 }
2898
2899 // Setup current thread to record sampled allocated objects.
2900 JvmtiSampledObjectAllocEventCollector::JvmtiSampledObjectAllocEventCollector() {
2901 if (JvmtiExport::should_post_sampled_object_alloc()) {
2902 _enable = true;
2903 _post_callback = JvmtiExport::post_sampled_object_alloc;
2904 setup_jvmti_thread_state();
2905 }
2906 }
2907
2908 JvmtiSampledObjectAllocEventCollector::~JvmtiSampledObjectAllocEventCollector() {
2909 generate_call_for_allocated();
2910 unset_jvmti_thread_state();
2911 }
2912
2913 JvmtiGCMarker::JvmtiGCMarker() {
2914 // if there aren't any JVMTI environments then nothing to do
2915 if (!JvmtiEnv::environments_might_exist()) {
2916 return;
2917 }
2918
2919 if (JvmtiExport::should_post_garbage_collection_start()) {
2920 JvmtiExport::post_garbage_collection_start();
2921 }
2922
2923 if (SafepointSynchronize::is_at_safepoint()) {
2924 // Do clean up tasks that need to be done at a safepoint
2925 JvmtiEnvBase::check_for_periodic_clean_up();
2926 }
2927 }
2928
2929 JvmtiGCMarker::~JvmtiGCMarker() {
2930 // if there aren't any JVMTI environments then nothing to do
2931 if (!JvmtiEnv::environments_might_exist()) {
2932 return;
2933 }
2934
2935 // JVMTI notify gc finish
2936 if (JvmtiExport::should_post_garbage_collection_finish()) {
2937 JvmtiExport::post_garbage_collection_finish();
2938 }
2939 }