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
63 #ifdef JVMTI_TRACE
64 #define EVT_TRACE(evt,out) if ((JvmtiTrace::event_trace_flags(evt) & JvmtiTrace::SHOW_EVENT_SENT) != 0) { SafeResourceMark rm; log_trace(jvmti) out; }
65 #define EVT_TRIG_TRACE(evt,out) if ((JvmtiTrace::event_trace_flags(evt) & JvmtiTrace::SHOW_EVENT_TRIGGER) != 0) { SafeResourceMark rm; log_trace(jvmti) out; }
66 #else
67 #define EVT_TRIG_TRACE(evt,out)
68 #define EVT_TRACE(evt,out)
69 #endif
70
71 ///////////////////////////////////////////////////////////////
72 //
73 // JvmtiEventTransition
74 //
75 // TO DO --
76 // more handle purging
77
78 // Use this for JavaThreads and state is _thread_in_vm.
79 class JvmtiJavaThreadEventTransition : StackObj {
80 private:
81 ResourceMark _rm;
82 ThreadToNativeFromVM _transition;
83 HandleMark _hm;
84
85 public:
86 JvmtiJavaThreadEventTransition(JavaThread *thread) :
87 _rm(),
88 _transition(thread),
89 _hm(thread) {};
90 };
91
92 // For JavaThreads which are not in _thread_in_vm state
93 // and other system threads use this.
94 class JvmtiThreadEventTransition : StackObj {
95 private:
96 ResourceMark _rm;
97 HandleMark _hm;
98 JavaThreadState _saved_state;
99 JavaThread *_jthread;
100
101 public:
102 JvmtiThreadEventTransition(Thread *thread) : _rm(), _hm() {
103 if (thread->is_Java_thread()) {
104 _jthread = (JavaThread *)thread;
105 _saved_state = _jthread->thread_state();
106 if (_saved_state == _thread_in_Java) {
107 ThreadStateTransition::transition_from_java(_jthread, _thread_in_native);
108 } else {
109 ThreadStateTransition::transition(_jthread, _saved_state, _thread_in_native);
110 }
111 } else {
112 _jthread = NULL;
113 }
114 }
115
116 ~JvmtiThreadEventTransition() {
117 if (_jthread != NULL)
118 ThreadStateTransition::transition_from_native(_jthread, _saved_state);
119 }
120 };
121
122
123 ///////////////////////////////////////////////////////////////
124 //
125 // JvmtiEventMark
126 //
127
128 class JvmtiEventMark : public StackObj {
129 private:
130 JavaThread *_thread;
131 JNIEnv* _jni_env;
132 JvmtiThreadState::ExceptionState _saved_exception_state;
133 #if 0
134 JNIHandleBlock* _hblock;
135 #endif
136
137 public:
138 JvmtiEventMark(JavaThread *thread) : _thread(thread),
139 _jni_env(thread->jni_environment()),
140 _saved_exception_state(JvmtiThreadState::ES_CLEARED) {
141 #if 0
142 _hblock = thread->active_handles();
143 _hblock->clear_thoroughly(); // so we can be safe
144 #else
145 // we want to use the code above - but that needs the JNIHandle changes - later...
146 // for now, steal JNI push local frame code
147 JvmtiThreadState *state = thread->jvmti_thread_state();
148 // we are before an event.
149 // Save current jvmti thread exception state.
150 if (state != NULL) {
151 _saved_exception_state = state->get_exception_state();
152 }
153
154 JNIHandleBlock* old_handles = thread->active_handles();
155 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread);
156 assert(new_handles != NULL, "should not be NULL");
157 new_handles->set_pop_frame_link(old_handles);
158 thread->set_active_handles(new_handles);
159 #endif
160 assert(thread == JavaThread::current(), "thread must be current!");
161 thread->frame_anchor()->make_walkable(thread);
162 };
163
164 ~JvmtiEventMark() {
165 #if 0
166 _hblock->clear(); // for consistency with future correct behavior
167 #else
168 // we want to use the code above - but that needs the JNIHandle changes - later...
169 // for now, steal JNI pop local frame code
170 JNIHandleBlock* old_handles = _thread->active_handles();
171 JNIHandleBlock* new_handles = old_handles->pop_frame_link();
172 assert(new_handles != NULL, "should not be NULL");
173 _thread->set_active_handles(new_handles);
174 // Note that we set the pop_frame_link to NULL explicitly, otherwise
175 // the release_block call will release the blocks.
176 old_handles->set_pop_frame_link(NULL);
177 JNIHandleBlock::release_block(old_handles, _thread); // may block
178 #endif
179
180 JvmtiThreadState* state = _thread->jvmti_thread_state();
181 // we are continuing after an event.
182 if (state != NULL) {
183 // Restore the jvmti thread exception state.
184 state->restore_exception_state(_saved_exception_state);
185 }
186 }
187
188 #if 0
189 jobject to_jobject(oop obj) { return obj == NULL? NULL : _hblock->allocate_handle_fast(obj); }
190 #else
191 // we want to use the code above - but that needs the JNIHandle changes - later...
192 // for now, use regular make_local
193 jobject to_jobject(oop obj) { return JNIHandles::make_local(_thread,obj); }
194 #endif
195
196 jclass to_jclass(Klass* klass) { return (klass == NULL ? NULL : (jclass)to_jobject(klass->java_mirror())); }
197
198 jmethodID to_jmethodID(const methodHandle& method) { return method->jmethod_id(); }
199
200 JNIEnv* jni_env() { return _jni_env; }
201 };
202
203 class JvmtiThreadEventMark : public JvmtiEventMark {
204 private:
205 jthread _jt;
206
207 public:
208 JvmtiThreadEventMark(JavaThread *thread) :
209 JvmtiEventMark(thread) {
210 _jt = (jthread)(to_jobject(thread->threadObj()));
211 };
212 jthread jni_thread() { return _jt; }
213 };
214
215 class JvmtiClassEventMark : public JvmtiThreadEventMark {
216 private:
217 jclass _jc;
218
219 public:
220 JvmtiClassEventMark(JavaThread *thread, Klass* klass) :
221 JvmtiThreadEventMark(thread) {
222 _jc = to_jclass(klass);
223 };
224 jclass jni_class() { return _jc; }
225 };
226
227 class JvmtiMethodEventMark : public JvmtiThreadEventMark {
228 private:
229 jmethodID _mid;
230
231 public:
232 JvmtiMethodEventMark(JavaThread *thread, const methodHandle& method) :
233 JvmtiThreadEventMark(thread),
234 _mid(to_jmethodID(method)) {};
235 jmethodID jni_methodID() { return _mid; }
236 };
237
238 class JvmtiLocationEventMark : public JvmtiMethodEventMark {
239 private:
240 jlocation _loc;
241
242 public:
243 JvmtiLocationEventMark(JavaThread *thread, const methodHandle& method, address location) :
244 JvmtiMethodEventMark(thread, method),
245 _loc(location - method->code_base()) {};
246 jlocation location() { return _loc; }
247 };
248
249 class JvmtiExceptionEventMark : public JvmtiLocationEventMark {
250 private:
251 jobject _exc;
252
253 public:
254 JvmtiExceptionEventMark(JavaThread *thread, const methodHandle& method, address location, Handle exception) :
255 JvmtiLocationEventMark(thread, method, location),
256 _exc(to_jobject(exception())) {};
257 jobject exception() { return _exc; }
258 };
259
260 class JvmtiClassFileLoadEventMark : public JvmtiThreadEventMark {
261 private:
262 const char *_class_name;
263 jobject _jloader;
264 jobject _protection_domain;
265 jclass _class_being_redefined;
266
267 public:
268 JvmtiClassFileLoadEventMark(JavaThread *thread, Symbol* name,
269 Handle class_loader, Handle prot_domain, Klass* class_being_redefined) : JvmtiThreadEventMark(thread) {
270 _class_name = name != NULL? name->as_utf8() : NULL;
271 _jloader = (jobject)to_jobject(class_loader());
272 _protection_domain = (jobject)to_jobject(prot_domain());
273 if (class_being_redefined == NULL) {
274 _class_being_redefined = NULL;
275 } else {
276 _class_being_redefined = (jclass)to_jclass(class_being_redefined);
277 }
278 };
279 const char *class_name() {
280 return _class_name;
281 }
282 jobject jloader() {
283 return _jloader;
284 }
285 jobject protection_domain() {
286 return _protection_domain;
287 }
288 jclass class_being_redefined() {
289 return _class_being_redefined;
290 }
291 };
292
293 //////////////////////////////////////////////////////////////////////////////
294
295 int JvmtiExport::_field_access_count = 0;
296 int JvmtiExport::_field_modification_count = 0;
297
298 bool JvmtiExport::_can_access_local_variables = false;
299 bool JvmtiExport::_can_hotswap_or_post_breakpoint = false;
300 bool JvmtiExport::_can_modify_any_class = false;
301 bool JvmtiExport::_can_walk_any_space = false;
302
303 bool JvmtiExport::_has_redefined_a_class = false;
304 bool JvmtiExport::_all_dependencies_are_recorded = false;
305
306 //
307 // field access management
308 //
309
310 // interpreter generator needs the address of the counter
311 address JvmtiExport::get_field_access_count_addr() {
312 // We don't grab a lock because we don't want to
313 // serialize field access between all threads. This means that a
314 // thread on another processor can see the wrong count value and
315 // may either miss making a needed call into post_field_access()
316 // or will make an unneeded call into post_field_access(). We pay
317 // this price to avoid slowing down the VM when we aren't watching
318 // field accesses.
319 // Other access/mutation safe by virtue of being in VM state.
320 return (address)(&_field_access_count);
321 }
322
323 //
324 // field modification management
325 //
326
327 // interpreter generator needs the address of the counter
328 address JvmtiExport::get_field_modification_count_addr() {
329 // We don't grab a lock because we don't
330 // want to serialize field modification between all threads. This
331 // means that a thread on another processor can see the wrong
332 // count value and may either miss making a needed call into
333 // post_field_modification() or will make an unneeded call into
334 // post_field_modification(). We pay this price to avoid slowing
335 // down the VM when we aren't watching field modifications.
336 // Other access/mutation safe by virtue of being in VM state.
337 return (address)(&_field_modification_count);
338 }
339
340
341 ///////////////////////////////////////////////////////////////
342 // Functions needed by java.lang.instrument for starting up javaagent.
343 ///////////////////////////////////////////////////////////////
344
345 jint
346 JvmtiExport::get_jvmti_interface(JavaVM *jvm, void **penv, jint version) {
347 // The JVMTI_VERSION_INTERFACE_JVMTI part of the version number
348 // has already been validated in JNI GetEnv().
349 int major, minor, micro;
350
351 // micro version doesn't matter here (yet?)
352 decode_version_values(version, &major, &minor, µ);
353 switch (major) {
354 case 1:
355 switch (minor) {
356 case 0: // version 1.0.<micro> is recognized
357 case 1: // version 1.1.<micro> is recognized
358 case 2: // version 1.2.<micro> is recognized
359 break;
360
361 default:
362 return JNI_EVERSION; // unsupported minor version number
363 }
364 break;
365 case 9:
366 switch (minor) {
367 case 0: // version 9.0.<micro> is recognized
368 break;
369 default:
370 return JNI_EVERSION; // unsupported minor version number
371 }
372 break;
373 case 11:
374 switch (minor) {
375 case 0: // version 11.0.<micro> is recognized
376 break;
377 default:
378 return JNI_EVERSION; // unsupported minor version number
379 }
380 break;
381 default:
382 return JNI_EVERSION; // unsupported major version number
383 }
384
385 if (JvmtiEnv::get_phase() == JVMTI_PHASE_LIVE) {
386 JavaThread* current_thread = JavaThread::current();
387 // transition code: native to VM
388 ThreadInVMfromNative __tiv(current_thread);
389 VM_ENTRY_BASE(jvmtiEnv*, JvmtiExport::get_jvmti_interface, current_thread)
390 debug_only(VMNativeEntryWrapper __vew;)
391
392 JvmtiEnv *jvmti_env = JvmtiEnv::create_a_jvmti(version);
393 *penv = jvmti_env->jvmti_external(); // actual type is jvmtiEnv* -- not to be confused with JvmtiEnv*
394 return JNI_OK;
395
396 } else if (JvmtiEnv::get_phase() == JVMTI_PHASE_ONLOAD) {
397 // not live, no thread to transition
398 JvmtiEnv *jvmti_env = JvmtiEnv::create_a_jvmti(version);
399 *penv = jvmti_env->jvmti_external(); // actual type is jvmtiEnv* -- not to be confused with JvmtiEnv*
400 return JNI_OK;
401
402 } else {
403 // Called at the wrong time
404 *penv = NULL;
405 return JNI_EDETACHED;
406 }
407 }
408
409 void
410 JvmtiExport::add_default_read_edges(Handle h_module, TRAPS) {
411 if (!Universe::is_module_initialized()) {
412 return; // extra safety
413 }
414 assert(!h_module.is_null(), "module should always be set");
415
416 // Invoke the transformedByAgent method
417 JavaValue result(T_VOID);
418 JavaCalls::call_static(&result,
419 SystemDictionary::module_Modules_klass(),
420 vmSymbols::transformedByAgent_name(),
421 vmSymbols::transformedByAgent_signature(),
422 h_module,
423 THREAD);
424
425 if (HAS_PENDING_EXCEPTION) {
426 LogTarget(Trace, jvmti) log;
427 LogStream log_stream(log);
428 java_lang_Throwable::print(PENDING_EXCEPTION, &log_stream);
429 log_stream.cr();
430 CLEAR_PENDING_EXCEPTION;
431 return;
432 }
433 }
434
435 jvmtiError
436 JvmtiExport::add_module_reads(Handle module, Handle to_module, TRAPS) {
437 if (!Universe::is_module_initialized()) {
438 return JVMTI_ERROR_NONE; // extra safety
439 }
440 assert(!module.is_null(), "module should always be set");
441 assert(!to_module.is_null(), "to_module should always be set");
442
443 // Invoke the addReads method
444 JavaValue result(T_VOID);
445 JavaCalls::call_static(&result,
446 SystemDictionary::module_Modules_klass(),
447 vmSymbols::addReads_name(),
448 vmSymbols::addReads_signature(),
449 module,
450 to_module,
451 THREAD);
452
453 if (HAS_PENDING_EXCEPTION) {
454 LogTarget(Trace, jvmti) log;
455 LogStream log_stream(log);
456 java_lang_Throwable::print(PENDING_EXCEPTION, &log_stream);
457 log_stream.cr();
458 CLEAR_PENDING_EXCEPTION;
459 return JVMTI_ERROR_INTERNAL;
460 }
461 return JVMTI_ERROR_NONE;
462 }
463
464 jvmtiError
465 JvmtiExport::add_module_exports(Handle module, Handle pkg_name, Handle to_module, TRAPS) {
466 if (!Universe::is_module_initialized()) {
467 return JVMTI_ERROR_NONE; // extra safety
468 }
469 assert(!module.is_null(), "module should always be set");
470 assert(!to_module.is_null(), "to_module should always be set");
471 assert(!pkg_name.is_null(), "pkg_name should always be set");
472
473 // Invoke the addExports method
474 JavaValue result(T_VOID);
475 JavaCalls::call_static(&result,
476 SystemDictionary::module_Modules_klass(),
477 vmSymbols::addExports_name(),
478 vmSymbols::addExports_signature(),
479 module,
480 pkg_name,
481 to_module,
482 THREAD);
483
484 if (HAS_PENDING_EXCEPTION) {
485 Symbol* ex_name = PENDING_EXCEPTION->klass()->name();
486 LogTarget(Trace, jvmti) log;
487 LogStream log_stream(log);
488 java_lang_Throwable::print(PENDING_EXCEPTION, &log_stream);
489 log_stream.cr();
490 CLEAR_PENDING_EXCEPTION;
491 if (ex_name == vmSymbols::java_lang_IllegalArgumentException()) {
492 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
493 }
494 return JVMTI_ERROR_INTERNAL;
495 }
496 return JVMTI_ERROR_NONE;
497 }
498
499 jvmtiError
500 JvmtiExport::add_module_opens(Handle module, Handle pkg_name, Handle to_module, TRAPS) {
501 if (!Universe::is_module_initialized()) {
502 return JVMTI_ERROR_NONE; // extra safety
503 }
504 assert(!module.is_null(), "module should always be set");
505 assert(!to_module.is_null(), "to_module should always be set");
506 assert(!pkg_name.is_null(), "pkg_name should always be set");
507
508 // Invoke the addOpens method
509 JavaValue result(T_VOID);
510 JavaCalls::call_static(&result,
511 SystemDictionary::module_Modules_klass(),
512 vmSymbols::addOpens_name(),
513 vmSymbols::addExports_signature(),
514 module,
515 pkg_name,
516 to_module,
517 THREAD);
518
519 if (HAS_PENDING_EXCEPTION) {
520 Symbol* ex_name = PENDING_EXCEPTION->klass()->name();
521 LogTarget(Trace, jvmti) log;
522 LogStream log_stream(log);
523 java_lang_Throwable::print(PENDING_EXCEPTION, &log_stream);
524 log_stream.cr();
525 CLEAR_PENDING_EXCEPTION;
526 if (ex_name == vmSymbols::java_lang_IllegalArgumentException()) {
527 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
528 }
529 return JVMTI_ERROR_INTERNAL;
530 }
531 return JVMTI_ERROR_NONE;
532 }
533
534 jvmtiError
535 JvmtiExport::add_module_uses(Handle module, Handle service, TRAPS) {
536 if (!Universe::is_module_initialized()) {
537 return JVMTI_ERROR_NONE; // extra safety
538 }
539 assert(!module.is_null(), "module should always be set");
540 assert(!service.is_null(), "service should always be set");
541
542 // Invoke the addUses method
543 JavaValue result(T_VOID);
544 JavaCalls::call_static(&result,
545 SystemDictionary::module_Modules_klass(),
546 vmSymbols::addUses_name(),
547 vmSymbols::addUses_signature(),
548 module,
549 service,
550 THREAD);
551
552 if (HAS_PENDING_EXCEPTION) {
553 LogTarget(Trace, jvmti) log;
554 LogStream log_stream(log);
555 java_lang_Throwable::print(PENDING_EXCEPTION, &log_stream);
556 log_stream.cr();
557 CLEAR_PENDING_EXCEPTION;
558 return JVMTI_ERROR_INTERNAL;
559 }
560 return JVMTI_ERROR_NONE;
561 }
562
563 jvmtiError
564 JvmtiExport::add_module_provides(Handle module, Handle service, Handle impl_class, TRAPS) {
565 if (!Universe::is_module_initialized()) {
566 return JVMTI_ERROR_NONE; // extra safety
567 }
568 assert(!module.is_null(), "module should always be set");
569 assert(!service.is_null(), "service should always be set");
570 assert(!impl_class.is_null(), "impl_class should always be set");
571
572 // Invoke the addProvides method
573 JavaValue result(T_VOID);
574 JavaCalls::call_static(&result,
575 SystemDictionary::module_Modules_klass(),
576 vmSymbols::addProvides_name(),
577 vmSymbols::addProvides_signature(),
578 module,
579 service,
580 impl_class,
581 THREAD);
582
583 if (HAS_PENDING_EXCEPTION) {
584 LogTarget(Trace, jvmti) log;
585 LogStream log_stream(log);
586 java_lang_Throwable::print(PENDING_EXCEPTION, &log_stream);
587 log_stream.cr();
588 CLEAR_PENDING_EXCEPTION;
589 return JVMTI_ERROR_INTERNAL;
590 }
591 return JVMTI_ERROR_NONE;
592 }
593
594 void
595 JvmtiExport::decode_version_values(jint version, int * major, int * minor,
596 int * micro) {
597 *major = (version & JVMTI_VERSION_MASK_MAJOR) >> JVMTI_VERSION_SHIFT_MAJOR;
598 *minor = (version & JVMTI_VERSION_MASK_MINOR) >> JVMTI_VERSION_SHIFT_MINOR;
599 *micro = (version & JVMTI_VERSION_MASK_MICRO) >> JVMTI_VERSION_SHIFT_MICRO;
600 }
601
602 void JvmtiExport::enter_primordial_phase() {
603 JvmtiEnvBase::set_phase(JVMTI_PHASE_PRIMORDIAL);
604 }
605
606 void JvmtiExport::enter_early_start_phase() {
607 set_early_vmstart_recorded(true);
608 }
609
610 void JvmtiExport::enter_start_phase() {
611 JvmtiEnvBase::set_phase(JVMTI_PHASE_START);
612 }
613
614 void JvmtiExport::enter_onload_phase() {
615 JvmtiEnvBase::set_phase(JVMTI_PHASE_ONLOAD);
616 }
617
618 void JvmtiExport::enter_live_phase() {
619 JvmtiEnvBase::set_phase(JVMTI_PHASE_LIVE);
620 }
621
622 //
623 // JVMTI events that the VM posts to the debugger and also startup agent
624 // and call the agent's premain() for java.lang.instrument.
625 //
626
627 void JvmtiExport::post_early_vm_start() {
628 EVT_TRIG_TRACE(JVMTI_EVENT_VM_START, ("Trg Early VM start event triggered" ));
629
630 // can now enable some events
631 JvmtiEventController::vm_start();
632
633 JvmtiEnvIterator it;
634 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
635 // Only early vmstart envs post early VMStart event
636 if (env->early_vmstart_env() && env->is_enabled(JVMTI_EVENT_VM_START)) {
637 EVT_TRACE(JVMTI_EVENT_VM_START, ("Evt Early VM start event sent" ));
638 JavaThread *thread = JavaThread::current();
639 JvmtiThreadEventMark jem(thread);
640 JvmtiJavaThreadEventTransition jet(thread);
641 jvmtiEventVMStart callback = env->callbacks()->VMStart;
642 if (callback != NULL) {
643 (*callback)(env->jvmti_external(), jem.jni_env());
644 }
645 }
646 }
647 }
648
649 void JvmtiExport::post_vm_start() {
650 EVT_TRIG_TRACE(JVMTI_EVENT_VM_START, ("Trg VM start event triggered" ));
651
652 // can now enable some events
653 JvmtiEventController::vm_start();
654
655 JvmtiEnvIterator it;
656 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
657 // Early vmstart envs do not post normal VMStart event
658 if (!env->early_vmstart_env() && env->is_enabled(JVMTI_EVENT_VM_START)) {
659 EVT_TRACE(JVMTI_EVENT_VM_START, ("Evt VM start event sent" ));
660
661 JavaThread *thread = JavaThread::current();
662 JvmtiThreadEventMark jem(thread);
663 JvmtiJavaThreadEventTransition jet(thread);
664 jvmtiEventVMStart callback = env->callbacks()->VMStart;
665 if (callback != NULL) {
666 (*callback)(env->jvmti_external(), jem.jni_env());
667 }
668 }
669 }
670 }
671
672
673 void JvmtiExport::post_vm_initialized() {
674 EVT_TRIG_TRACE(JVMTI_EVENT_VM_INIT, ("Trg VM init event triggered" ));
675
676 // can now enable events
677 JvmtiEventController::vm_init();
678
679 JvmtiEnvIterator it;
680 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
681 if (env->is_enabled(JVMTI_EVENT_VM_INIT)) {
682 EVT_TRACE(JVMTI_EVENT_VM_INIT, ("Evt VM init event sent" ));
683
684 JavaThread *thread = JavaThread::current();
685 JvmtiThreadEventMark jem(thread);
686 JvmtiJavaThreadEventTransition jet(thread);
687 jvmtiEventVMInit callback = env->callbacks()->VMInit;
688 if (callback != NULL) {
689 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread());
690 }
691 }
692 }
693 }
694
695
696 void JvmtiExport::post_vm_death() {
697 EVT_TRIG_TRACE(JVMTI_EVENT_VM_DEATH, ("Trg VM death event triggered" ));
698
699 JvmtiEnvIterator it;
700 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
701 if (env->is_enabled(JVMTI_EVENT_VM_DEATH)) {
702 EVT_TRACE(JVMTI_EVENT_VM_DEATH, ("Evt VM death event sent" ));
703
704 JavaThread *thread = JavaThread::current();
705 JvmtiEventMark jem(thread);
706 JvmtiJavaThreadEventTransition jet(thread);
707 jvmtiEventVMDeath callback = env->callbacks()->VMDeath;
708 if (callback != NULL) {
709 (*callback)(env->jvmti_external(), jem.jni_env());
710 }
711 }
712 }
713
714 JvmtiEnvBase::set_phase(JVMTI_PHASE_DEAD);
715 JvmtiEventController::vm_death();
716 }
717
718 char**
719 JvmtiExport::get_all_native_method_prefixes(int* count_ptr) {
720 // Have to grab JVMTI thread state lock to be sure environment doesn't
721 // go away while we iterate them. No locks during VM bring-up.
722 if (Threads::number_of_threads() == 0 || SafepointSynchronize::is_at_safepoint()) {
723 return JvmtiEnvBase::get_all_native_method_prefixes(count_ptr);
724 } else {
725 MutexLocker mu(JvmtiThreadState_lock);
726 return JvmtiEnvBase::get_all_native_method_prefixes(count_ptr);
727 }
728 }
729
730 // Convert an external thread reference to a JavaThread found on the
731 // specified ThreadsList. The ThreadsListHandle in the caller "protects"
732 // the returned JavaThread *.
733 //
734 // If thread_oop_p is not NULL, then the caller wants to use the oop
735 // after this call so the oop is returned. On success, *jt_pp is set
736 // to the converted JavaThread * and JVMTI_ERROR_NONE is returned.
737 // On error, returns various JVMTI_ERROR_* values.
738 //
739 jvmtiError
740 JvmtiExport::cv_external_thread_to_JavaThread(ThreadsList * t_list,
741 jthread thread,
742 JavaThread ** jt_pp,
743 oop * thread_oop_p) {
744 assert(t_list != NULL, "must have a ThreadsList");
745 assert(jt_pp != NULL, "must have a return JavaThread pointer");
746 // thread_oop_p is optional so no assert()
747
748 oop thread_oop = JNIHandles::resolve_external_guard(thread);
749 if (thread_oop == NULL) {
750 // NULL jthread, GC'ed jthread or a bad JNI handle.
751 return JVMTI_ERROR_INVALID_THREAD;
752 }
753 // Looks like an oop at this point.
754
755 if (!thread_oop->is_a(SystemDictionary::Thread_klass())) {
756 // The oop is not a java.lang.Thread.
757 return JVMTI_ERROR_INVALID_THREAD;
758 }
759 // Looks like a java.lang.Thread oop at this point.
760
761 if (thread_oop_p != NULL) {
762 // Return the oop to the caller; the caller may still want
763 // the oop even if this function returns an error.
764 *thread_oop_p = thread_oop;
765 }
766
767 JavaThread * java_thread = java_lang_Thread::thread(thread_oop);
768 if (java_thread == NULL) {
769 // The java.lang.Thread does not contain a JavaThread * so it has
770 // not yet run or it has died.
771 return JVMTI_ERROR_THREAD_NOT_ALIVE;
772 }
773 // Looks like a live JavaThread at this point.
774
775 // We do not check the EnableThreadSMRExtraValidityChecks option
776 // for this includes() call because JVM/TI's spec is tighter.
777 if (!t_list->includes(java_thread)) {
778 // Not on the JavaThreads list so it is not alive.
779 return JVMTI_ERROR_THREAD_NOT_ALIVE;
780 }
781
782 // Return a live JavaThread that is "protected" by the
783 // ThreadsListHandle in the caller.
784 *jt_pp = java_thread;
785
786 return JVMTI_ERROR_NONE;
787 }
788
789 // Convert an oop to a JavaThread found on the specified ThreadsList.
790 // The ThreadsListHandle in the caller "protects" the returned
791 // JavaThread *.
792 //
793 // On success, *jt_pp is set to the converted JavaThread * and
794 // JVMTI_ERROR_NONE is returned. On error, returns various
795 // JVMTI_ERROR_* values.
796 //
797 jvmtiError
798 JvmtiExport::cv_oop_to_JavaThread(ThreadsList * t_list, oop thread_oop,
799 JavaThread ** jt_pp) {
800 assert(t_list != NULL, "must have a ThreadsList");
801 assert(thread_oop != NULL, "must have an oop");
802 assert(jt_pp != NULL, "must have a return JavaThread pointer");
803
804 if (!thread_oop->is_a(SystemDictionary::Thread_klass())) {
805 // The oop is not a java.lang.Thread.
806 return JVMTI_ERROR_INVALID_THREAD;
807 }
808 // Looks like a java.lang.Thread oop at this point.
809
810 JavaThread * java_thread = java_lang_Thread::thread(thread_oop);
811 if (java_thread == NULL) {
812 // The java.lang.Thread does not contain a JavaThread * so it has
813 // not yet run or it has died.
814 return JVMTI_ERROR_THREAD_NOT_ALIVE;
815 }
816 // Looks like a live JavaThread at this point.
817
818 // We do not check the EnableThreadSMRExtraValidityChecks option
819 // for this includes() call because JVM/TI's spec is tighter.
820 if (!t_list->includes(java_thread)) {
821 // Not on the JavaThreads list so it is not alive.
822 return JVMTI_ERROR_THREAD_NOT_ALIVE;
823 }
824
825 // Return a live JavaThread that is "protected" by the
826 // ThreadsListHandle in the caller.
827 *jt_pp = java_thread;
828
829 return JVMTI_ERROR_NONE;
830 }
831
832 class JvmtiClassFileLoadHookPoster : public StackObj {
833 private:
834 Symbol* _h_name;
835 Handle _class_loader;
836 Handle _h_protection_domain;
837 unsigned char ** _data_ptr;
838 unsigned char ** _end_ptr;
839 JavaThread * _thread;
840 jint _curr_len;
841 unsigned char * _curr_data;
842 JvmtiEnv * _curr_env;
843 JvmtiCachedClassFileData ** _cached_class_file_ptr;
844 JvmtiThreadState * _state;
845 Klass* _class_being_redefined;
846 JvmtiClassLoadKind _load_kind;
847 bool _has_been_modified;
848
849 public:
850 inline JvmtiClassFileLoadHookPoster(Symbol* h_name, Handle class_loader,
851 Handle h_protection_domain,
852 unsigned char **data_ptr, unsigned char **end_ptr,
853 JvmtiCachedClassFileData **cache_ptr) {
854 _h_name = h_name;
855 _class_loader = class_loader;
856 _h_protection_domain = h_protection_domain;
857 _data_ptr = data_ptr;
858 _end_ptr = end_ptr;
859 _thread = JavaThread::current();
860 _curr_len = *end_ptr - *data_ptr;
861 _curr_data = *data_ptr;
862 _curr_env = NULL;
863 _cached_class_file_ptr = cache_ptr;
864 _has_been_modified = false;
865
866 _state = _thread->jvmti_thread_state();
867 if (_state != NULL) {
868 _class_being_redefined = _state->get_class_being_redefined();
869 _load_kind = _state->get_class_load_kind();
870 Klass* klass = (_class_being_redefined == NULL) ? NULL : _class_being_redefined;
871 if (_load_kind != jvmti_class_load_kind_load && klass != NULL) {
872 ModuleEntry* module_entry = InstanceKlass::cast(klass)->module();
873 assert(module_entry != NULL, "module_entry should always be set");
874 if (module_entry->is_named() &&
875 module_entry->module() != NULL &&
876 !module_entry->has_default_read_edges()) {
877 if (!module_entry->set_has_default_read_edges()) {
878 // We won a potential race.
879 // Add read edges to the unnamed modules of the bootstrap and app class loaders
880 Handle class_module(_thread, module_entry->module()); // Obtain j.l.r.Module
881 JvmtiExport::add_default_read_edges(class_module, _thread);
882 }
883 }
884 }
885 // Clear class_being_redefined flag here. The action
886 // from agent handler could generate a new class file load
887 // hook event and if it is not cleared the new event generated
888 // from regular class file load could have this stale redefined
889 // class handle info.
890 _state->clear_class_being_redefined();
891 } else {
892 // redefine and retransform will always set the thread state
893 _class_being_redefined = NULL;
894 _load_kind = jvmti_class_load_kind_load;
895 }
896 }
897
898 void post() {
899 post_all_envs();
900 copy_modified_data();
901 }
902
903 bool has_been_modified() { return _has_been_modified; }
904
905 private:
906 void post_all_envs() {
907 if (_load_kind != jvmti_class_load_kind_retransform) {
908 // for class load and redefine,
909 // call the non-retransformable agents
910 JvmtiEnvIterator it;
911 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
912 if (!env->is_retransformable() && env->is_enabled(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK)) {
913 // non-retransformable agents cannot retransform back,
914 // so no need to cache the original class file bytes
915 post_to_env(env, false);
916 }
917 }
918 }
919 JvmtiEnvIterator it;
920 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
921 // retransformable agents get all events
922 if (env->is_retransformable() && env->is_enabled(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK)) {
923 // retransformable agents need to cache the original class file
924 // bytes if changes are made via the ClassFileLoadHook
925 post_to_env(env, true);
926 }
927 }
928 }
929
930 void post_to_env(JvmtiEnv* env, bool caching_needed) {
931 if (env->phase() == JVMTI_PHASE_PRIMORDIAL && !env->early_class_hook_env()) {
932 return;
933 }
934 unsigned char *new_data = NULL;
935 jint new_len = 0;
936 JvmtiClassFileLoadEventMark jem(_thread, _h_name, _class_loader,
937 _h_protection_domain,
938 _class_being_redefined);
939 JvmtiJavaThreadEventTransition jet(_thread);
940 jvmtiEventClassFileLoadHook callback = env->callbacks()->ClassFileLoadHook;
941 if (callback != NULL) {
942 (*callback)(env->jvmti_external(), jem.jni_env(),
943 jem.class_being_redefined(),
944 jem.jloader(), jem.class_name(),
945 jem.protection_domain(),
946 _curr_len, _curr_data,
947 &new_len, &new_data);
948 }
949 if (new_data != NULL) {
950 // this agent has modified class data.
951 _has_been_modified = true;
952 if (caching_needed && *_cached_class_file_ptr == NULL) {
953 // data has been changed by the new retransformable agent
954 // and it hasn't already been cached, cache it
955 JvmtiCachedClassFileData *p;
956 p = (JvmtiCachedClassFileData *)os::malloc(
957 offset_of(JvmtiCachedClassFileData, data) + _curr_len, mtInternal);
958 if (p == NULL) {
959 vm_exit_out_of_memory(offset_of(JvmtiCachedClassFileData, data) + _curr_len,
960 OOM_MALLOC_ERROR,
961 "unable to allocate cached copy of original class bytes");
962 }
963 p->length = _curr_len;
964 memcpy(p->data, _curr_data, _curr_len);
965 *_cached_class_file_ptr = p;
966 }
967
968 if (_curr_data != *_data_ptr) {
969 // curr_data is previous agent modified class data.
970 // And this has been changed by the new agent so
971 // we can delete it now.
972 _curr_env->Deallocate(_curr_data);
973 }
974
975 // Class file data has changed by the current agent.
976 _curr_data = new_data;
977 _curr_len = new_len;
978 // Save the current agent env we need this to deallocate the
979 // memory allocated by this agent.
980 _curr_env = env;
981 }
982 }
983
984 void copy_modified_data() {
985 // if one of the agent has modified class file data.
986 // Copy modified class data to new resources array.
987 if (_curr_data != *_data_ptr) {
988 *_data_ptr = NEW_RESOURCE_ARRAY(u1, _curr_len);
989 memcpy(*_data_ptr, _curr_data, _curr_len);
990 *_end_ptr = *_data_ptr + _curr_len;
991 _curr_env->Deallocate(_curr_data);
992 }
993 }
994 };
995
996 bool JvmtiExport::_should_post_class_file_load_hook = false;
997
998 // this entry is for class file load hook on class load, redefine and retransform
999 bool JvmtiExport::post_class_file_load_hook(Symbol* h_name,
1000 Handle class_loader,
1001 Handle h_protection_domain,
1002 unsigned char **data_ptr,
1003 unsigned char **end_ptr,
1004 JvmtiCachedClassFileData **cache_ptr) {
1005 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) {
1006 return false;
1007 }
1008
1009 JvmtiClassFileLoadHookPoster poster(h_name, class_loader,
1010 h_protection_domain,
1011 data_ptr, end_ptr,
1012 cache_ptr);
1013 poster.post();
1014 return poster.has_been_modified();
1015 }
1016
1017 void JvmtiExport::report_unsupported(bool on) {
1018 // If any JVMTI service is turned on, we need to exit before native code
1019 // tries to access nonexistant services.
1020 if (on) {
1021 vm_exit_during_initialization("Java Kernel does not support JVMTI.");
1022 }
1023 }
1024
1025
1026 static inline Klass* oop_to_klass(oop obj) {
1027 Klass* k = obj->klass();
1028
1029 // if the object is a java.lang.Class then return the java mirror
1030 if (k == SystemDictionary::Class_klass()) {
1031 if (!java_lang_Class::is_primitive(obj)) {
1032 k = java_lang_Class::as_Klass(obj);
1033 assert(k != NULL, "class for non-primitive mirror must exist");
1034 }
1035 }
1036 return k;
1037 }
1038
1039 class JvmtiVMObjectAllocEventMark : public JvmtiClassEventMark {
1040 private:
1041 jobject _jobj;
1042 jlong _size;
1043 public:
1044 JvmtiVMObjectAllocEventMark(JavaThread *thread, oop obj) : JvmtiClassEventMark(thread, oop_to_klass(obj)) {
1045 _jobj = (jobject)to_jobject(obj);
1046 _size = obj->size() * wordSize;
1047 };
1048 jobject jni_jobject() { return _jobj; }
1049 jlong size() { return _size; }
1050 };
1051
1052 class JvmtiCompiledMethodLoadEventMark : public JvmtiMethodEventMark {
1053 private:
1054 jint _code_size;
1055 const void *_code_data;
1056 jint _map_length;
1057 jvmtiAddrLocationMap *_map;
1058 const void *_compile_info;
1059 public:
1060 JvmtiCompiledMethodLoadEventMark(JavaThread *thread, nmethod *nm, void* compile_info_ptr = NULL)
1061 : JvmtiMethodEventMark(thread,methodHandle(thread, nm->method())) {
1062 _code_data = nm->insts_begin();
1063 _code_size = nm->insts_size();
1064 _compile_info = compile_info_ptr; // Set void pointer of compiledMethodLoad Event. Default value is NULL.
1065 JvmtiCodeBlobEvents::build_jvmti_addr_location_map(nm, &_map, &_map_length);
1066 }
1067 ~JvmtiCompiledMethodLoadEventMark() {
1068 FREE_C_HEAP_ARRAY(jvmtiAddrLocationMap, _map);
1069 }
1070
1071 jint code_size() { return _code_size; }
1072 const void *code_data() { return _code_data; }
1073 jint map_length() { return _map_length; }
1074 const jvmtiAddrLocationMap* map() { return _map; }
1075 const void *compile_info() { return _compile_info; }
1076 };
1077
1078
1079
1080 class JvmtiMonitorEventMark : public JvmtiThreadEventMark {
1081 private:
1082 jobject _jobj;
1083 public:
1084 JvmtiMonitorEventMark(JavaThread *thread, oop object)
1085 : JvmtiThreadEventMark(thread){
1086 _jobj = to_jobject(object);
1087 }
1088 jobject jni_object() { return _jobj; }
1089 };
1090
1091 ///////////////////////////////////////////////////////////////
1092 //
1093 // pending CompiledMethodUnload support
1094 //
1095
1096 void JvmtiExport::post_compiled_method_unload(
1097 jmethodID method, const void *code_begin) {
1098 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) {
1099 return;
1100 }
1101 JavaThread* thread = JavaThread::current();
1102 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_UNLOAD,
1103 ("[%s] method compile unload event triggered",
1104 JvmtiTrace::safe_get_thread_name(thread)));
1105
1106 // post the event for each environment that has this event enabled.
1107 JvmtiEnvIterator it;
1108 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1109 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_UNLOAD)) {
1110 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) {
1111 continue;
1112 }
1113 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_UNLOAD,
1114 ("[%s] class compile method unload event sent jmethodID " PTR_FORMAT,
1115 JvmtiTrace::safe_get_thread_name(thread), p2i(method)));
1116
1117 ResourceMark rm(thread);
1118
1119 JvmtiEventMark jem(thread);
1120 JvmtiJavaThreadEventTransition jet(thread);
1121 jvmtiEventCompiledMethodUnload callback = env->callbacks()->CompiledMethodUnload;
1122 if (callback != NULL) {
1123 (*callback)(env->jvmti_external(), method, code_begin);
1124 }
1125 }
1126 }
1127 }
1128
1129 ///////////////////////////////////////////////////////////////
1130 //
1131 // JvmtiExport
1132 //
1133
1134 void JvmtiExport::post_raw_breakpoint(JavaThread *thread, Method* method, address location) {
1135 HandleMark hm(thread);
1136 methodHandle mh(thread, method);
1137
1138 JvmtiThreadState *state = thread->jvmti_thread_state();
1139 if (state == NULL) {
1140 return;
1141 }
1142 EVT_TRIG_TRACE(JVMTI_EVENT_BREAKPOINT, ("[%s] Trg Breakpoint triggered",
1143 JvmtiTrace::safe_get_thread_name(thread)));
1144 JvmtiEnvThreadStateIterator it(state);
1145 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1146 ets->compare_and_set_current_location(mh(), location, JVMTI_EVENT_BREAKPOINT);
1147 if (!ets->breakpoint_posted() && ets->is_enabled(JVMTI_EVENT_BREAKPOINT)) {
1148 ThreadState old_os_state = thread->osthread()->get_state();
1149 thread->osthread()->set_state(BREAKPOINTED);
1150 EVT_TRACE(JVMTI_EVENT_BREAKPOINT, ("[%s] Evt Breakpoint sent %s.%s @ " INTX_FORMAT,
1151 JvmtiTrace::safe_get_thread_name(thread),
1152 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1153 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1154 location - mh()->code_base() ));
1155
1156 JvmtiEnv *env = ets->get_env();
1157 JvmtiLocationEventMark jem(thread, mh, location);
1158 JvmtiJavaThreadEventTransition jet(thread);
1159 jvmtiEventBreakpoint callback = env->callbacks()->Breakpoint;
1160 if (callback != NULL) {
1161 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1162 jem.jni_methodID(), jem.location());
1163 }
1164
1165 ets->set_breakpoint_posted();
1166 thread->osthread()->set_state(old_os_state);
1167 }
1168 }
1169 }
1170
1171 //////////////////////////////////////////////////////////////////////////////
1172
1173 bool JvmtiExport::_can_get_source_debug_extension = false;
1174 bool JvmtiExport::_can_maintain_original_method_order = false;
1175 bool JvmtiExport::_can_post_interpreter_events = false;
1176 bool JvmtiExport::_can_post_on_exceptions = false;
1177 bool JvmtiExport::_can_post_breakpoint = false;
1178 bool JvmtiExport::_can_post_field_access = false;
1179 bool JvmtiExport::_can_post_field_modification = false;
1180 bool JvmtiExport::_can_post_method_entry = false;
1181 bool JvmtiExport::_can_post_method_exit = false;
1182 bool JvmtiExport::_can_pop_frame = false;
1183 bool JvmtiExport::_can_force_early_return = false;
1184
1185 bool JvmtiExport::_early_vmstart_recorded = false;
1186
1187 bool JvmtiExport::_should_post_single_step = false;
1188 bool JvmtiExport::_should_post_field_access = false;
1189 bool JvmtiExport::_should_post_field_modification = false;
1190 bool JvmtiExport::_should_post_class_load = false;
1191 bool JvmtiExport::_should_post_class_prepare = false;
1192 bool JvmtiExport::_should_post_class_unload = false;
1193 bool JvmtiExport::_should_post_thread_life = false;
1194 bool JvmtiExport::_should_clean_up_heap_objects = false;
1195 bool JvmtiExport::_should_post_native_method_bind = false;
1196 bool JvmtiExport::_should_post_dynamic_code_generated = false;
1197 bool JvmtiExport::_should_post_data_dump = false;
1198 bool JvmtiExport::_should_post_compiled_method_load = false;
1199 bool JvmtiExport::_should_post_compiled_method_unload = false;
1200 bool JvmtiExport::_should_post_monitor_contended_enter = false;
1201 bool JvmtiExport::_should_post_monitor_contended_entered = false;
1202 bool JvmtiExport::_should_post_monitor_wait = false;
1203 bool JvmtiExport::_should_post_monitor_waited = false;
1204 bool JvmtiExport::_should_post_garbage_collection_start = false;
1205 bool JvmtiExport::_should_post_garbage_collection_finish = false;
1206 bool JvmtiExport::_should_post_object_free = false;
1207 bool JvmtiExport::_should_post_resource_exhausted = false;
1208 bool JvmtiExport::_should_post_vm_object_alloc = false;
1209 bool JvmtiExport::_should_post_on_exceptions = false;
1210
1211 ////////////////////////////////////////////////////////////////////////////////////////////////
1212
1213
1214 //
1215 // JVMTI single step management
1216 //
1217 void JvmtiExport::at_single_stepping_point(JavaThread *thread, Method* method, address location) {
1218 assert(JvmtiExport::should_post_single_step(), "must be single stepping");
1219
1220 HandleMark hm(thread);
1221 methodHandle mh(thread, method);
1222
1223 // update information about current location and post a step event
1224 JvmtiThreadState *state = thread->jvmti_thread_state();
1225 if (state == NULL) {
1226 return;
1227 }
1228 EVT_TRIG_TRACE(JVMTI_EVENT_SINGLE_STEP, ("[%s] Trg Single Step triggered",
1229 JvmtiTrace::safe_get_thread_name(thread)));
1230 if (!state->hide_single_stepping()) {
1231 if (state->is_pending_step_for_popframe()) {
1232 state->process_pending_step_for_popframe();
1233 }
1234 if (state->is_pending_step_for_earlyret()) {
1235 state->process_pending_step_for_earlyret();
1236 }
1237 JvmtiExport::post_single_step(thread, mh(), location);
1238 }
1239 }
1240
1241
1242 void JvmtiExport::expose_single_stepping(JavaThread *thread) {
1243 JvmtiThreadState *state = thread->jvmti_thread_state();
1244 if (state != NULL) {
1245 state->clear_hide_single_stepping();
1246 }
1247 }
1248
1249
1250 bool JvmtiExport::hide_single_stepping(JavaThread *thread) {
1251 JvmtiThreadState *state = thread->jvmti_thread_state();
1252 if (state != NULL && state->is_enabled(JVMTI_EVENT_SINGLE_STEP)) {
1253 state->set_hide_single_stepping();
1254 return true;
1255 } else {
1256 return false;
1257 }
1258 }
1259
1260 void JvmtiExport::post_class_load(JavaThread *thread, Klass* klass) {
1261 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) {
1262 return;
1263 }
1264 HandleMark hm(thread);
1265
1266 EVT_TRIG_TRACE(JVMTI_EVENT_CLASS_LOAD, ("[%s] Trg Class Load triggered",
1267 JvmtiTrace::safe_get_thread_name(thread)));
1268 JvmtiThreadState* state = thread->jvmti_thread_state();
1269 if (state == NULL) {
1270 return;
1271 }
1272 JvmtiEnvThreadStateIterator it(state);
1273 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1274 if (ets->is_enabled(JVMTI_EVENT_CLASS_LOAD)) {
1275 JvmtiEnv *env = ets->get_env();
1276 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) {
1277 continue;
1278 }
1279 EVT_TRACE(JVMTI_EVENT_CLASS_LOAD, ("[%s] Evt Class Load sent %s",
1280 JvmtiTrace::safe_get_thread_name(thread),
1281 klass==NULL? "NULL" : klass->external_name() ));
1282 JvmtiClassEventMark jem(thread, klass);
1283 JvmtiJavaThreadEventTransition jet(thread);
1284 jvmtiEventClassLoad callback = env->callbacks()->ClassLoad;
1285 if (callback != NULL) {
1286 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_class());
1287 }
1288 }
1289 }
1290 }
1291
1292
1293 void JvmtiExport::post_class_prepare(JavaThread *thread, Klass* klass) {
1294 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) {
1295 return;
1296 }
1297 HandleMark hm(thread);
1298
1299 EVT_TRIG_TRACE(JVMTI_EVENT_CLASS_PREPARE, ("[%s] Trg Class Prepare triggered",
1300 JvmtiTrace::safe_get_thread_name(thread)));
1301 JvmtiThreadState* state = thread->jvmti_thread_state();
1302 if (state == NULL) {
1303 return;
1304 }
1305 JvmtiEnvThreadStateIterator it(state);
1306 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1307 if (ets->is_enabled(JVMTI_EVENT_CLASS_PREPARE)) {
1308 JvmtiEnv *env = ets->get_env();
1309 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) {
1310 continue;
1311 }
1312 EVT_TRACE(JVMTI_EVENT_CLASS_PREPARE, ("[%s] Evt Class Prepare sent %s",
1313 JvmtiTrace::safe_get_thread_name(thread),
1314 klass==NULL? "NULL" : klass->external_name() ));
1315 JvmtiClassEventMark jem(thread, klass);
1316 JvmtiJavaThreadEventTransition jet(thread);
1317 jvmtiEventClassPrepare callback = env->callbacks()->ClassPrepare;
1318 if (callback != NULL) {
1319 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_class());
1320 }
1321 }
1322 }
1323 }
1324
1325 void JvmtiExport::post_class_unload(Klass* klass) {
1326 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) {
1327 return;
1328 }
1329 Thread *thread = Thread::current();
1330 HandleMark hm(thread);
1331
1332 EVT_TRIG_TRACE(EXT_EVENT_CLASS_UNLOAD, ("[?] Trg Class Unload triggered" ));
1333 if (JvmtiEventController::is_enabled((jvmtiEvent)EXT_EVENT_CLASS_UNLOAD)) {
1334 assert(thread->is_VM_thread(), "wrong thread");
1335
1336 // get JavaThread for whom we are proxy
1337 Thread *calling_thread = ((VMThread *)thread)->vm_operation()->calling_thread();
1338 if (!calling_thread->is_Java_thread()) {
1339 // cannot post an event to a non-JavaThread
1340 return;
1341 }
1342 JavaThread *real_thread = (JavaThread *)calling_thread;
1343
1344 JvmtiEnvIterator it;
1345 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1346 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) {
1347 continue;
1348 }
1349 if (env->is_enabled((jvmtiEvent)EXT_EVENT_CLASS_UNLOAD)) {
1350 EVT_TRACE(EXT_EVENT_CLASS_UNLOAD, ("[?] Evt Class Unload sent %s",
1351 klass==NULL? "NULL" : klass->external_name() ));
1352
1353 // do everything manually, since this is a proxy - needs special care
1354 JNIEnv* jni_env = real_thread->jni_environment();
1355 jthread jt = (jthread)JNIHandles::make_local(real_thread, real_thread->threadObj());
1356 jclass jk = (jclass)JNIHandles::make_local(real_thread, klass->java_mirror());
1357
1358 // Before we call the JVMTI agent, we have to set the state in the
1359 // thread for which we are proxying.
1360 JavaThreadState prev_state = real_thread->thread_state();
1361 assert(((Thread *)real_thread)->is_ConcurrentGC_thread() ||
1362 (real_thread->is_Java_thread() && prev_state == _thread_blocked),
1363 "should be ConcurrentGCThread or JavaThread at safepoint");
1364 real_thread->set_thread_state(_thread_in_native);
1365
1366 jvmtiExtensionEvent callback = env->ext_callbacks()->ClassUnload;
1367 if (callback != NULL) {
1368 (*callback)(env->jvmti_external(), jni_env, jt, jk);
1369 }
1370
1371 assert(real_thread->thread_state() == _thread_in_native,
1372 "JavaThread should be in native");
1373 real_thread->set_thread_state(prev_state);
1374
1375 JNIHandles::destroy_local(jk);
1376 JNIHandles::destroy_local(jt);
1377 }
1378 }
1379 }
1380 }
1381
1382
1383 void JvmtiExport::post_thread_start(JavaThread *thread) {
1384 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) {
1385 return;
1386 }
1387 assert(thread->thread_state() == _thread_in_vm, "must be in vm state");
1388
1389 EVT_TRIG_TRACE(JVMTI_EVENT_THREAD_START, ("[%s] Trg Thread Start event triggered",
1390 JvmtiTrace::safe_get_thread_name(thread)));
1391
1392 // do JVMTI thread initialization (if needed)
1393 JvmtiEventController::thread_started(thread);
1394
1395 // Do not post thread start event for hidden java thread.
1396 if (JvmtiEventController::is_enabled(JVMTI_EVENT_THREAD_START) &&
1397 !thread->is_hidden_from_external_view()) {
1398 JvmtiEnvIterator it;
1399 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1400 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) {
1401 continue;
1402 }
1403 if (env->is_enabled(JVMTI_EVENT_THREAD_START)) {
1404 EVT_TRACE(JVMTI_EVENT_THREAD_START, ("[%s] Evt Thread Start event sent",
1405 JvmtiTrace::safe_get_thread_name(thread) ));
1406
1407 JvmtiThreadEventMark jem(thread);
1408 JvmtiJavaThreadEventTransition jet(thread);
1409 jvmtiEventThreadStart callback = env->callbacks()->ThreadStart;
1410 if (callback != NULL) {
1411 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread());
1412 }
1413 }
1414 }
1415 }
1416 }
1417
1418
1419 void JvmtiExport::post_thread_end(JavaThread *thread) {
1420 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) {
1421 return;
1422 }
1423 EVT_TRIG_TRACE(JVMTI_EVENT_THREAD_END, ("[%s] Trg Thread End event triggered",
1424 JvmtiTrace::safe_get_thread_name(thread)));
1425
1426 JvmtiThreadState *state = thread->jvmti_thread_state();
1427 if (state == NULL) {
1428 return;
1429 }
1430
1431 // Do not post thread end event for hidden java thread.
1432 if (state->is_enabled(JVMTI_EVENT_THREAD_END) &&
1433 !thread->is_hidden_from_external_view()) {
1434
1435 JvmtiEnvThreadStateIterator it(state);
1436 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1437 if (ets->is_enabled(JVMTI_EVENT_THREAD_END)) {
1438 JvmtiEnv *env = ets->get_env();
1439 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) {
1440 continue;
1441 }
1442 EVT_TRACE(JVMTI_EVENT_THREAD_END, ("[%s] Evt Thread End event sent",
1443 JvmtiTrace::safe_get_thread_name(thread) ));
1444
1445 JvmtiThreadEventMark jem(thread);
1446 JvmtiJavaThreadEventTransition jet(thread);
1447 jvmtiEventThreadEnd callback = env->callbacks()->ThreadEnd;
1448 if (callback != NULL) {
1449 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread());
1450 }
1451 }
1452 }
1453 }
1454 }
1455
1456 void JvmtiExport::post_object_free(JvmtiEnv* env, jlong tag) {
1457 assert(SafepointSynchronize::is_at_safepoint(), "must be executed at safepoint");
1458 assert(env->is_enabled(JVMTI_EVENT_OBJECT_FREE), "checking");
1459
1460 EVT_TRIG_TRACE(JVMTI_EVENT_OBJECT_FREE, ("[?] Trg Object Free triggered" ));
1461 EVT_TRACE(JVMTI_EVENT_OBJECT_FREE, ("[?] Evt Object Free sent"));
1462
1463 jvmtiEventObjectFree callback = env->callbacks()->ObjectFree;
1464 if (callback != NULL) {
1465 (*callback)(env->jvmti_external(), tag);
1466 }
1467 }
1468
1469 void JvmtiExport::post_resource_exhausted(jint resource_exhausted_flags, const char* description) {
1470 EVT_TRIG_TRACE(JVMTI_EVENT_RESOURCE_EXHAUSTED, ("Trg resource exhausted event triggered" ));
1471
1472 JvmtiEnvIterator it;
1473 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1474 if (env->is_enabled(JVMTI_EVENT_RESOURCE_EXHAUSTED)) {
1475 EVT_TRACE(JVMTI_EVENT_RESOURCE_EXHAUSTED, ("Evt resource exhausted event sent" ));
1476
1477 JavaThread *thread = JavaThread::current();
1478 JvmtiThreadEventMark jem(thread);
1479 JvmtiJavaThreadEventTransition jet(thread);
1480 jvmtiEventResourceExhausted callback = env->callbacks()->ResourceExhausted;
1481 if (callback != NULL) {
1482 (*callback)(env->jvmti_external(), jem.jni_env(),
1483 resource_exhausted_flags, NULL, description);
1484 }
1485 }
1486 }
1487 }
1488
1489 void JvmtiExport::post_method_entry(JavaThread *thread, Method* method, frame current_frame) {
1490 HandleMark hm(thread);
1491 methodHandle mh(thread, method);
1492
1493 EVT_TRIG_TRACE(JVMTI_EVENT_METHOD_ENTRY, ("[%s] Trg Method Entry triggered %s.%s",
1494 JvmtiTrace::safe_get_thread_name(thread),
1495 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1496 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1497
1498 JvmtiThreadState* state = thread->jvmti_thread_state();
1499 if (state == NULL || !state->is_interp_only_mode()) {
1500 // for any thread that actually wants method entry, interp_only_mode is set
1501 return;
1502 }
1503
1504 state->incr_cur_stack_depth();
1505
1506 if (state->is_enabled(JVMTI_EVENT_METHOD_ENTRY)) {
1507 JvmtiEnvThreadStateIterator it(state);
1508 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1509 if (ets->is_enabled(JVMTI_EVENT_METHOD_ENTRY)) {
1510 EVT_TRACE(JVMTI_EVENT_METHOD_ENTRY, ("[%s] Evt Method Entry sent %s.%s",
1511 JvmtiTrace::safe_get_thread_name(thread),
1512 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1513 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1514
1515 JvmtiEnv *env = ets->get_env();
1516 JvmtiMethodEventMark jem(thread, mh);
1517 JvmtiJavaThreadEventTransition jet(thread);
1518 jvmtiEventMethodEntry callback = env->callbacks()->MethodEntry;
1519 if (callback != NULL) {
1520 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_methodID());
1521 }
1522 }
1523 }
1524 }
1525 }
1526
1527 void JvmtiExport::post_method_exit(JavaThread *thread, Method* method, frame current_frame) {
1528 HandleMark hm(thread);
1529 methodHandle mh(thread, method);
1530
1531 EVT_TRIG_TRACE(JVMTI_EVENT_METHOD_EXIT, ("[%s] Trg Method Exit triggered %s.%s",
1532 JvmtiTrace::safe_get_thread_name(thread),
1533 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1534 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1535
1536 JvmtiThreadState *state = thread->jvmti_thread_state();
1537 if (state == NULL || !state->is_interp_only_mode()) {
1538 // for any thread that actually wants method exit, interp_only_mode is set
1539 return;
1540 }
1541
1542 // return a flag when a method terminates by throwing an exception
1543 // i.e. if an exception is thrown and it's not caught by the current method
1544 bool exception_exit = state->is_exception_detected() && !state->is_exception_caught();
1545
1546
1547 if (state->is_enabled(JVMTI_EVENT_METHOD_EXIT)) {
1548 Handle result;
1549 jvalue value;
1550 value.j = 0L;
1551
1552 // if the method hasn't been popped because of an exception then we populate
1553 // the return_value parameter for the callback. At this point we only have
1554 // the address of a "raw result" and we just call into the interpreter to
1555 // convert this into a jvalue.
1556 if (!exception_exit) {
1557 oop oop_result;
1558 BasicType type = current_frame.interpreter_frame_result(&oop_result, &value);
1559 if (type == T_OBJECT || type == T_ARRAY) {
1560 result = Handle(thread, oop_result);
1561 }
1562 }
1563
1564 JvmtiEnvThreadStateIterator it(state);
1565 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1566 if (ets->is_enabled(JVMTI_EVENT_METHOD_EXIT)) {
1567 EVT_TRACE(JVMTI_EVENT_METHOD_EXIT, ("[%s] Evt Method Exit sent %s.%s",
1568 JvmtiTrace::safe_get_thread_name(thread),
1569 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1570 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1571
1572 JvmtiEnv *env = ets->get_env();
1573 JvmtiMethodEventMark jem(thread, mh);
1574 if (result.not_null()) {
1575 value.l = JNIHandles::make_local(thread, result());
1576 }
1577 JvmtiJavaThreadEventTransition jet(thread);
1578 jvmtiEventMethodExit callback = env->callbacks()->MethodExit;
1579 if (callback != NULL) {
1580 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1581 jem.jni_methodID(), exception_exit, value);
1582 }
1583 }
1584 }
1585 }
1586
1587 if (state->is_enabled(JVMTI_EVENT_FRAME_POP)) {
1588 JvmtiEnvThreadStateIterator it(state);
1589 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1590 int cur_frame_number = state->cur_stack_depth();
1591
1592 if (ets->is_frame_pop(cur_frame_number)) {
1593 // we have a NotifyFramePop entry for this frame.
1594 // now check that this env/thread wants this event
1595 if (ets->is_enabled(JVMTI_EVENT_FRAME_POP)) {
1596 EVT_TRACE(JVMTI_EVENT_FRAME_POP, ("[%s] Evt Frame Pop sent %s.%s",
1597 JvmtiTrace::safe_get_thread_name(thread),
1598 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1599 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1600
1601 // we also need to issue a frame pop event for this frame
1602 JvmtiEnv *env = ets->get_env();
1603 JvmtiMethodEventMark jem(thread, mh);
1604 JvmtiJavaThreadEventTransition jet(thread);
1605 jvmtiEventFramePop callback = env->callbacks()->FramePop;
1606 if (callback != NULL) {
1607 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1608 jem.jni_methodID(), exception_exit);
1609 }
1610 }
1611 // remove the frame's entry
1612 ets->clear_frame_pop(cur_frame_number);
1613 }
1614 }
1615 }
1616
1617 state->decr_cur_stack_depth();
1618 }
1619
1620
1621 // Todo: inline this for optimization
1622 void JvmtiExport::post_single_step(JavaThread *thread, Method* method, address location) {
1623 HandleMark hm(thread);
1624 methodHandle mh(thread, method);
1625
1626 JvmtiThreadState *state = thread->jvmti_thread_state();
1627 if (state == NULL) {
1628 return;
1629 }
1630 JvmtiEnvThreadStateIterator it(state);
1631 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1632 ets->compare_and_set_current_location(mh(), location, JVMTI_EVENT_SINGLE_STEP);
1633 if (!ets->single_stepping_posted() && ets->is_enabled(JVMTI_EVENT_SINGLE_STEP)) {
1634 EVT_TRACE(JVMTI_EVENT_SINGLE_STEP, ("[%s] Evt Single Step sent %s.%s @ " INTX_FORMAT,
1635 JvmtiTrace::safe_get_thread_name(thread),
1636 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1637 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1638 location - mh()->code_base() ));
1639
1640 JvmtiEnv *env = ets->get_env();
1641 JvmtiLocationEventMark jem(thread, mh, location);
1642 JvmtiJavaThreadEventTransition jet(thread);
1643 jvmtiEventSingleStep callback = env->callbacks()->SingleStep;
1644 if (callback != NULL) {
1645 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1646 jem.jni_methodID(), jem.location());
1647 }
1648
1649 ets->set_single_stepping_posted();
1650 }
1651 }
1652 }
1653
1654 void JvmtiExport::post_exception_throw(JavaThread *thread, Method* method, address location, oop exception) {
1655 HandleMark hm(thread);
1656 methodHandle mh(thread, method);
1657 Handle exception_handle(thread, exception);
1658
1659 JvmtiThreadState *state = thread->jvmti_thread_state();
1660 if (state == NULL) {
1661 return;
1662 }
1663
1664 EVT_TRIG_TRACE(JVMTI_EVENT_EXCEPTION, ("[%s] Trg Exception thrown triggered",
1665 JvmtiTrace::safe_get_thread_name(thread)));
1666 if (!state->is_exception_detected()) {
1667 state->set_exception_detected();
1668 JvmtiEnvThreadStateIterator it(state);
1669 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1670 if (ets->is_enabled(JVMTI_EVENT_EXCEPTION) && (exception != NULL)) {
1671
1672 EVT_TRACE(JVMTI_EVENT_EXCEPTION,
1673 ("[%s] Evt Exception thrown sent %s.%s @ " INTX_FORMAT,
1674 JvmtiTrace::safe_get_thread_name(thread),
1675 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1676 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1677 location - mh()->code_base() ));
1678
1679 JvmtiEnv *env = ets->get_env();
1680 JvmtiExceptionEventMark jem(thread, mh, location, exception_handle);
1681
1682 // It's okay to clear these exceptions here because we duplicate
1683 // this lookup in InterpreterRuntime::exception_handler_for_exception.
1684 EXCEPTION_MARK;
1685
1686 bool should_repeat;
1687 vframeStream st(thread);
1688 assert(!st.at_end(), "cannot be at end");
1689 Method* current_method = NULL;
1690 // A GC may occur during the Method::fast_exception_handler_bci_for()
1691 // call below if it needs to load the constraint class. Using a
1692 // methodHandle to keep the 'current_method' from being deallocated
1693 // if GC happens.
1694 methodHandle current_mh = methodHandle(thread, current_method);
1695 int current_bci = -1;
1696 do {
1697 current_method = st.method();
1698 current_mh = methodHandle(thread, current_method);
1699 current_bci = st.bci();
1700 do {
1701 should_repeat = false;
1702 Klass* eh_klass = exception_handle()->klass();
1703 current_bci = Method::fast_exception_handler_bci_for(
1704 current_mh, eh_klass, current_bci, THREAD);
1705 if (HAS_PENDING_EXCEPTION) {
1706 exception_handle = Handle(thread, PENDING_EXCEPTION);
1707 CLEAR_PENDING_EXCEPTION;
1708 should_repeat = true;
1709 }
1710 } while (should_repeat && (current_bci != -1));
1711 st.next();
1712 } while ((current_bci < 0) && (!st.at_end()));
1713
1714 jmethodID catch_jmethodID;
1715 if (current_bci < 0) {
1716 catch_jmethodID = 0;
1717 current_bci = 0;
1718 } else {
1719 catch_jmethodID = jem.to_jmethodID(current_mh);
1720 }
1721
1722 JvmtiJavaThreadEventTransition jet(thread);
1723 jvmtiEventException callback = env->callbacks()->Exception;
1724 if (callback != NULL) {
1725 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1726 jem.jni_methodID(), jem.location(),
1727 jem.exception(),
1728 catch_jmethodID, current_bci);
1729 }
1730 }
1731 }
1732 }
1733
1734 // frames may get popped because of this throw, be safe - invalidate cached depth
1735 state->invalidate_cur_stack_depth();
1736 }
1737
1738
1739 void JvmtiExport::notice_unwind_due_to_exception(JavaThread *thread, Method* method, address location, oop exception, bool in_handler_frame) {
1740 HandleMark hm(thread);
1741 methodHandle mh(thread, method);
1742 Handle exception_handle(thread, exception);
1743
1744 JvmtiThreadState *state = thread->jvmti_thread_state();
1745 if (state == NULL) {
1746 return;
1747 }
1748 EVT_TRIG_TRACE(JVMTI_EVENT_EXCEPTION_CATCH,
1749 ("[%s] Trg unwind_due_to_exception triggered %s.%s @ %s" INTX_FORMAT " - %s",
1750 JvmtiTrace::safe_get_thread_name(thread),
1751 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1752 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1753 location==0? "no location:" : "",
1754 location==0? 0 : location - mh()->code_base(),
1755 in_handler_frame? "in handler frame" : "not handler frame" ));
1756
1757 if (state->is_exception_detected()) {
1758
1759 state->invalidate_cur_stack_depth();
1760 if (!in_handler_frame) {
1761 // Not in exception handler.
1762 if(state->is_interp_only_mode()) {
1763 // method exit and frame pop events are posted only in interp mode.
1764 // When these events are enabled code should be in running in interp mode.
1765 JvmtiExport::post_method_exit(thread, method, thread->last_frame());
1766 // The cached cur_stack_depth might have changed from the
1767 // operations of frame pop or method exit. We are not 100% sure
1768 // the cached cur_stack_depth is still valid depth so invalidate
1769 // it.
1770 state->invalidate_cur_stack_depth();
1771 }
1772 } else {
1773 // In exception handler frame. Report exception catch.
1774 assert(location != NULL, "must be a known location");
1775 // Update cur_stack_depth - the frames above the current frame
1776 // have been unwound due to this exception:
1777 assert(!state->is_exception_caught(), "exception must not be caught yet.");
1778 state->set_exception_caught();
1779
1780 JvmtiEnvThreadStateIterator it(state);
1781 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1782 if (ets->is_enabled(JVMTI_EVENT_EXCEPTION_CATCH) && (exception_handle() != NULL)) {
1783 EVT_TRACE(JVMTI_EVENT_EXCEPTION_CATCH,
1784 ("[%s] Evt ExceptionCatch sent %s.%s @ " INTX_FORMAT,
1785 JvmtiTrace::safe_get_thread_name(thread),
1786 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1787 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1788 location - mh()->code_base() ));
1789
1790 JvmtiEnv *env = ets->get_env();
1791 JvmtiExceptionEventMark jem(thread, mh, location, exception_handle);
1792 JvmtiJavaThreadEventTransition jet(thread);
1793 jvmtiEventExceptionCatch callback = env->callbacks()->ExceptionCatch;
1794 if (callback != NULL) {
1795 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1796 jem.jni_methodID(), jem.location(),
1797 jem.exception());
1798 }
1799 }
1800 }
1801 }
1802 }
1803 }
1804
1805 oop JvmtiExport::jni_GetField_probe(JavaThread *thread, jobject jobj, oop obj,
1806 Klass* klass, jfieldID fieldID, bool is_static) {
1807 if (*((int *)get_field_access_count_addr()) > 0 && thread->has_last_Java_frame()) {
1808 // At least one field access watch is set so we have more work
1809 // to do. This wrapper is used by entry points that allow us
1810 // to create handles in post_field_access_by_jni().
1811 post_field_access_by_jni(thread, obj, klass, fieldID, is_static);
1812 // event posting can block so refetch oop if we were passed a jobj
1813 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj);
1814 }
1815 return obj;
1816 }
1817
1818 oop JvmtiExport::jni_GetField_probe_nh(JavaThread *thread, jobject jobj, oop obj,
1819 Klass* klass, jfieldID fieldID, bool is_static) {
1820 if (*((int *)get_field_access_count_addr()) > 0 && thread->has_last_Java_frame()) {
1821 // At least one field access watch is set so we have more work
1822 // to do. This wrapper is used by "quick" entry points that don't
1823 // allow us to create handles in post_field_access_by_jni(). We
1824 // override that with a ResetNoHandleMark.
1825 ResetNoHandleMark rnhm;
1826 post_field_access_by_jni(thread, obj, klass, fieldID, is_static);
1827 // event posting can block so refetch oop if we were passed a jobj
1828 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj);
1829 }
1830 return obj;
1831 }
1832
1833 void JvmtiExport::post_field_access_by_jni(JavaThread *thread, oop obj,
1834 Klass* klass, jfieldID fieldID, bool is_static) {
1835 // We must be called with a Java context in order to provide reasonable
1836 // values for the klazz, method, and location fields. The callers of this
1837 // function don't make the call unless there is a Java context.
1838 assert(thread->has_last_Java_frame(), "must be called with a Java context");
1839
1840 ResourceMark rm;
1841 fieldDescriptor fd;
1842 // if get_field_descriptor finds fieldID to be invalid, then we just bail
1843 bool valid_fieldID = JvmtiEnv::get_field_descriptor(klass, fieldID, &fd);
1844 assert(valid_fieldID == true,"post_field_access_by_jni called with invalid fieldID");
1845 if (!valid_fieldID) return;
1846 // field accesses are not watched so bail
1847 if (!fd.is_field_access_watched()) return;
1848
1849 HandleMark hm(thread);
1850 Handle h_obj;
1851 if (!is_static) {
1852 // non-static field accessors have an object, but we need a handle
1853 assert(obj != NULL, "non-static needs an object");
1854 h_obj = Handle(thread, obj);
1855 }
1856 post_field_access(thread,
1857 thread->last_frame().interpreter_frame_method(),
1858 thread->last_frame().interpreter_frame_bcp(),
1859 klass, h_obj, fieldID);
1860 }
1861
1862 void JvmtiExport::post_field_access(JavaThread *thread, Method* method,
1863 address location, Klass* field_klass, Handle object, jfieldID field) {
1864
1865 HandleMark hm(thread);
1866 methodHandle mh(thread, method);
1867
1868 JvmtiThreadState *state = thread->jvmti_thread_state();
1869 if (state == NULL) {
1870 return;
1871 }
1872 EVT_TRIG_TRACE(JVMTI_EVENT_FIELD_ACCESS, ("[%s] Trg Field Access event triggered",
1873 JvmtiTrace::safe_get_thread_name(thread)));
1874 JvmtiEnvThreadStateIterator it(state);
1875 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1876 if (ets->is_enabled(JVMTI_EVENT_FIELD_ACCESS)) {
1877 EVT_TRACE(JVMTI_EVENT_FIELD_ACCESS, ("[%s] Evt Field Access event sent %s.%s @ " INTX_FORMAT,
1878 JvmtiTrace::safe_get_thread_name(thread),
1879 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1880 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1881 location - mh()->code_base() ));
1882
1883 JvmtiEnv *env = ets->get_env();
1884 JvmtiLocationEventMark jem(thread, mh, location);
1885 jclass field_jclass = jem.to_jclass(field_klass);
1886 jobject field_jobject = jem.to_jobject(object());
1887 JvmtiJavaThreadEventTransition jet(thread);
1888 jvmtiEventFieldAccess callback = env->callbacks()->FieldAccess;
1889 if (callback != NULL) {
1890 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1891 jem.jni_methodID(), jem.location(),
1892 field_jclass, field_jobject, field);
1893 }
1894 }
1895 }
1896 }
1897
1898 oop JvmtiExport::jni_SetField_probe(JavaThread *thread, jobject jobj, oop obj,
1899 Klass* klass, jfieldID fieldID, bool is_static,
1900 char sig_type, jvalue *value) {
1901 if (*((int *)get_field_modification_count_addr()) > 0 && thread->has_last_Java_frame()) {
1902 // At least one field modification watch is set so we have more work
1903 // to do. This wrapper is used by entry points that allow us
1904 // to create handles in post_field_modification_by_jni().
1905 post_field_modification_by_jni(thread, obj, klass, fieldID, is_static, sig_type, value);
1906 // event posting can block so refetch oop if we were passed a jobj
1907 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj);
1908 }
1909 return obj;
1910 }
1911
1912 oop JvmtiExport::jni_SetField_probe_nh(JavaThread *thread, jobject jobj, oop obj,
1913 Klass* klass, jfieldID fieldID, bool is_static,
1914 char sig_type, jvalue *value) {
1915 if (*((int *)get_field_modification_count_addr()) > 0 && thread->has_last_Java_frame()) {
1916 // At least one field modification watch is set so we have more work
1917 // to do. This wrapper is used by "quick" entry points that don't
1918 // allow us to create handles in post_field_modification_by_jni(). We
1919 // override that with a ResetNoHandleMark.
1920 ResetNoHandleMark rnhm;
1921 post_field_modification_by_jni(thread, obj, klass, fieldID, is_static, sig_type, value);
1922 // event posting can block so refetch oop if we were passed a jobj
1923 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj);
1924 }
1925 return obj;
1926 }
1927
1928 void JvmtiExport::post_field_modification_by_jni(JavaThread *thread, oop obj,
1929 Klass* klass, jfieldID fieldID, bool is_static,
1930 char sig_type, jvalue *value) {
1931 // We must be called with a Java context in order to provide reasonable
1932 // values for the klazz, method, and location fields. The callers of this
1933 // function don't make the call unless there is a Java context.
1934 assert(thread->has_last_Java_frame(), "must be called with Java context");
1935
1936 ResourceMark rm;
1937 fieldDescriptor fd;
1938 // if get_field_descriptor finds fieldID to be invalid, then we just bail
1939 bool valid_fieldID = JvmtiEnv::get_field_descriptor(klass, fieldID, &fd);
1940 assert(valid_fieldID == true,"post_field_modification_by_jni called with invalid fieldID");
1941 if (!valid_fieldID) return;
1942 // field modifications are not watched so bail
1943 if (!fd.is_field_modification_watched()) return;
1944
1945 HandleMark hm(thread);
1946
1947 Handle h_obj;
1948 if (!is_static) {
1949 // non-static field accessors have an object, but we need a handle
1950 assert(obj != NULL, "non-static needs an object");
1951 h_obj = Handle(thread, obj);
1952 }
1953 post_field_modification(thread,
1954 thread->last_frame().interpreter_frame_method(),
1955 thread->last_frame().interpreter_frame_bcp(),
1956 klass, h_obj, fieldID, sig_type, value);
1957 }
1958
1959 void JvmtiExport::post_raw_field_modification(JavaThread *thread, Method* method,
1960 address location, Klass* field_klass, Handle object, jfieldID field,
1961 char sig_type, jvalue *value) {
1962
1963 if (sig_type == 'I' || sig_type == 'Z' || sig_type == 'B' || sig_type == 'C' || sig_type == 'S') {
1964 // 'I' instructions are used for byte, char, short and int.
1965 // determine which it really is, and convert
1966 fieldDescriptor fd;
1967 bool found = JvmtiEnv::get_field_descriptor(field_klass, field, &fd);
1968 // should be found (if not, leave as is)
1969 if (found) {
1970 jint ival = value->i;
1971 // convert value from int to appropriate type
1972 switch (fd.field_type()) {
1973 case T_BOOLEAN:
1974 sig_type = 'Z';
1975 value->i = 0; // clear it
1976 value->z = (jboolean)ival;
1977 break;
1978 case T_BYTE:
1979 sig_type = 'B';
1980 value->i = 0; // clear it
1981 value->b = (jbyte)ival;
1982 break;
1983 case T_CHAR:
1984 sig_type = 'C';
1985 value->i = 0; // clear it
1986 value->c = (jchar)ival;
1987 break;
1988 case T_SHORT:
1989 sig_type = 'S';
1990 value->i = 0; // clear it
1991 value->s = (jshort)ival;
1992 break;
1993 case T_INT:
1994 // nothing to do
1995 break;
1996 default:
1997 // this is an integer instruction, should be one of above
1998 ShouldNotReachHere();
1999 break;
2000 }
2001 }
2002 }
2003
2004 assert(sig_type != '[', "array should have sig_type == 'L'");
2005 bool handle_created = false;
2006
2007 // convert oop to JNI handle.
2008 if (sig_type == 'L') {
2009 handle_created = true;
2010 value->l = (jobject)JNIHandles::make_local(thread, (oop)value->l);
2011 }
2012
2013 post_field_modification(thread, method, location, field_klass, object, field, sig_type, value);
2014
2015 // Destroy the JNI handle allocated above.
2016 if (handle_created) {
2017 JNIHandles::destroy_local(value->l);
2018 }
2019 }
2020
2021 void JvmtiExport::post_field_modification(JavaThread *thread, Method* method,
2022 address location, Klass* field_klass, Handle object, jfieldID field,
2023 char sig_type, jvalue *value_ptr) {
2024
2025 HandleMark hm(thread);
2026 methodHandle mh(thread, method);
2027
2028 JvmtiThreadState *state = thread->jvmti_thread_state();
2029 if (state == NULL) {
2030 return;
2031 }
2032 EVT_TRIG_TRACE(JVMTI_EVENT_FIELD_MODIFICATION,
2033 ("[%s] Trg Field Modification event triggered",
2034 JvmtiTrace::safe_get_thread_name(thread)));
2035
2036 JvmtiEnvThreadStateIterator it(state);
2037 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
2038 if (ets->is_enabled(JVMTI_EVENT_FIELD_MODIFICATION)) {
2039 EVT_TRACE(JVMTI_EVENT_FIELD_MODIFICATION,
2040 ("[%s] Evt Field Modification event sent %s.%s @ " INTX_FORMAT,
2041 JvmtiTrace::safe_get_thread_name(thread),
2042 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
2043 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
2044 location - mh()->code_base() ));
2045
2046 JvmtiEnv *env = ets->get_env();
2047 JvmtiLocationEventMark jem(thread, mh, location);
2048 jclass field_jclass = jem.to_jclass(field_klass);
2049 jobject field_jobject = jem.to_jobject(object());
2050 JvmtiJavaThreadEventTransition jet(thread);
2051 jvmtiEventFieldModification callback = env->callbacks()->FieldModification;
2052 if (callback != NULL) {
2053 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
2054 jem.jni_methodID(), jem.location(),
2055 field_jclass, field_jobject, field, sig_type, *value_ptr);
2056 }
2057 }
2058 }
2059 }
2060
2061 void JvmtiExport::post_native_method_bind(Method* method, address* function_ptr) {
2062 JavaThread* thread = JavaThread::current();
2063 assert(thread->thread_state() == _thread_in_vm, "must be in vm state");
2064
2065 HandleMark hm(thread);
2066 methodHandle mh(thread, method);
2067
2068 EVT_TRIG_TRACE(JVMTI_EVENT_NATIVE_METHOD_BIND, ("[%s] Trg Native Method Bind event triggered",
2069 JvmtiTrace::safe_get_thread_name(thread)));
2070
2071 if (JvmtiEventController::is_enabled(JVMTI_EVENT_NATIVE_METHOD_BIND)) {
2072 JvmtiEnvIterator it;
2073 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
2074 if (env->is_enabled(JVMTI_EVENT_NATIVE_METHOD_BIND)) {
2075 EVT_TRACE(JVMTI_EVENT_NATIVE_METHOD_BIND, ("[%s] Evt Native Method Bind event sent",
2076 JvmtiTrace::safe_get_thread_name(thread) ));
2077
2078 JvmtiMethodEventMark jem(thread, mh);
2079 JvmtiJavaThreadEventTransition jet(thread);
2080 JNIEnv* jni_env = (env->phase() == JVMTI_PHASE_PRIMORDIAL) ? NULL : jem.jni_env();
2081 jvmtiEventNativeMethodBind callback = env->callbacks()->NativeMethodBind;
2082 if (callback != NULL) {
2083 (*callback)(env->jvmti_external(), jni_env, jem.jni_thread(),
2084 jem.jni_methodID(), (void*)(*function_ptr), (void**)function_ptr);
2085 }
2086 }
2087 }
2088 }
2089 }
2090
2091 // Returns a record containing inlining information for the given nmethod
2092 jvmtiCompiledMethodLoadInlineRecord* create_inline_record(nmethod* nm) {
2093 jint numstackframes = 0;
2094 jvmtiCompiledMethodLoadInlineRecord* record = (jvmtiCompiledMethodLoadInlineRecord*)NEW_RESOURCE_OBJ(jvmtiCompiledMethodLoadInlineRecord);
2095 record->header.kind = JVMTI_CMLR_INLINE_INFO;
2096 record->header.next = NULL;
2097 record->header.majorinfoversion = JVMTI_CMLR_MAJOR_VERSION_1;
2098 record->header.minorinfoversion = JVMTI_CMLR_MINOR_VERSION_0;
2099 record->numpcs = 0;
2100 for(PcDesc* p = nm->scopes_pcs_begin(); p < nm->scopes_pcs_end(); p++) {
2101 if(p->scope_decode_offset() == DebugInformationRecorder::serialized_null) continue;
2102 record->numpcs++;
2103 }
2104 record->pcinfo = (PCStackInfo*)(NEW_RESOURCE_ARRAY(PCStackInfo, record->numpcs));
2105 int scope = 0;
2106 for(PcDesc* p = nm->scopes_pcs_begin(); p < nm->scopes_pcs_end(); p++) {
2107 if(p->scope_decode_offset() == DebugInformationRecorder::serialized_null) continue;
2108 void* pc_address = (void*)p->real_pc(nm);
2109 assert(pc_address != NULL, "pc_address must be non-null");
2110 record->pcinfo[scope].pc = pc_address;
2111 numstackframes=0;
2112 for(ScopeDesc* sd = nm->scope_desc_at(p->real_pc(nm));sd != NULL;sd = sd->sender()) {
2113 numstackframes++;
2114 }
2115 assert(numstackframes != 0, "numstackframes must be nonzero.");
2116 record->pcinfo[scope].methods = (jmethodID *)NEW_RESOURCE_ARRAY(jmethodID, numstackframes);
2117 record->pcinfo[scope].bcis = (jint *)NEW_RESOURCE_ARRAY(jint, numstackframes);
2118 record->pcinfo[scope].numstackframes = numstackframes;
2119 int stackframe = 0;
2120 for(ScopeDesc* sd = nm->scope_desc_at(p->real_pc(nm));sd != NULL;sd = sd->sender()) {
2121 // 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()
2122 assert(sd->method() != NULL, "sd->method() cannot be null.");
2123 record->pcinfo[scope].methods[stackframe] = sd->method()->jmethod_id();
2124 record->pcinfo[scope].bcis[stackframe] = sd->bci();
2125 stackframe++;
2126 }
2127 scope++;
2128 }
2129 return record;
2130 }
2131
2132 void JvmtiExport::post_compiled_method_load(nmethod *nm) {
2133 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) {
2134 return;
2135 }
2136 JavaThread* thread = JavaThread::current();
2137
2138 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
2139 ("[%s] method compile load event triggered",
2140 JvmtiTrace::safe_get_thread_name(thread)));
2141
2142 JvmtiEnvIterator it;
2143 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
2144 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_LOAD)) {
2145 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) {
2146 continue;
2147 }
2148 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
2149 ("[%s] class compile method load event sent %s.%s ",
2150 JvmtiTrace::safe_get_thread_name(thread),
2151 (nm->method() == NULL) ? "NULL" : nm->method()->klass_name()->as_C_string(),
2152 (nm->method() == NULL) ? "NULL" : nm->method()->name()->as_C_string()));
2153 ResourceMark rm(thread);
2154 HandleMark hm(thread);
2155
2156 // Add inlining information
2157 jvmtiCompiledMethodLoadInlineRecord* inlinerecord = create_inline_record(nm);
2158 // Pass inlining information through the void pointer
2159 JvmtiCompiledMethodLoadEventMark jem(thread, nm, inlinerecord);
2160 JvmtiJavaThreadEventTransition jet(thread);
2161 jvmtiEventCompiledMethodLoad callback = env->callbacks()->CompiledMethodLoad;
2162 if (callback != NULL) {
2163 (*callback)(env->jvmti_external(), jem.jni_methodID(),
2164 jem.code_size(), jem.code_data(), jem.map_length(),
2165 jem.map(), jem.compile_info());
2166 }
2167 }
2168 }
2169 }
2170
2171
2172 // post a COMPILED_METHOD_LOAD event for a given environment
2173 void JvmtiExport::post_compiled_method_load(JvmtiEnv* env, const jmethodID method, const jint length,
2174 const void *code_begin, const jint map_length,
2175 const jvmtiAddrLocationMap* map)
2176 {
2177 if (env->phase() <= JVMTI_PHASE_PRIMORDIAL) {
2178 return;
2179 }
2180 JavaThread* thread = JavaThread::current();
2181 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
2182 ("[%s] method compile load event triggered (by GenerateEvents)",
2183 JvmtiTrace::safe_get_thread_name(thread)));
2184 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_LOAD)) {
2185
2186 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
2187 ("[%s] class compile method load event sent (by GenerateEvents), jmethodID=" PTR_FORMAT,
2188 JvmtiTrace::safe_get_thread_name(thread), p2i(method)));
2189
2190 JvmtiEventMark jem(thread);
2191 JvmtiJavaThreadEventTransition jet(thread);
2192 jvmtiEventCompiledMethodLoad callback = env->callbacks()->CompiledMethodLoad;
2193 if (callback != NULL) {
2194 (*callback)(env->jvmti_external(), method,
2195 length, code_begin, map_length,
2196 map, NULL);
2197 }
2198 }
2199 }
2200
2201 void JvmtiExport::post_dynamic_code_generated_internal(const char *name, const void *code_begin, const void *code_end) {
2202 assert(name != NULL && name[0] != '\0', "sanity check");
2203
2204 JavaThread* thread = JavaThread::current();
2205 // In theory everyone coming thru here is in_vm but we need to be certain
2206 // because a callee will do a vm->native transition
2207 ThreadInVMfromUnknown __tiv;
2208
2209 EVT_TRIG_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED,
2210 ("[%s] method dynamic code generated event triggered",
2211 JvmtiTrace::safe_get_thread_name(thread)));
2212 JvmtiEnvIterator it;
2213 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
2214 if (env->is_enabled(JVMTI_EVENT_DYNAMIC_CODE_GENERATED)) {
2215 EVT_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED,
2216 ("[%s] dynamic code generated event sent for %s",
2217 JvmtiTrace::safe_get_thread_name(thread), name));
2218 JvmtiEventMark jem(thread);
2219 JvmtiJavaThreadEventTransition jet(thread);
2220 jint length = (jint)pointer_delta(code_end, code_begin, sizeof(char));
2221 jvmtiEventDynamicCodeGenerated callback = env->callbacks()->DynamicCodeGenerated;
2222 if (callback != NULL) {
2223 (*callback)(env->jvmti_external(), name, (void*)code_begin, length);
2224 }
2225 }
2226 }
2227 }
2228
2229 void JvmtiExport::post_dynamic_code_generated(const char *name, const void *code_begin, const void *code_end) {
2230 jvmtiPhase phase = JvmtiEnv::get_phase();
2231 if (phase == JVMTI_PHASE_PRIMORDIAL || phase == JVMTI_PHASE_START) {
2232 post_dynamic_code_generated_internal(name, code_begin, code_end);
2233 } else {
2234 // It may not be safe to post the event from this thread. Defer all
2235 // postings to the service thread so that it can perform them in a safe
2236 // context and in-order.
2237 MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag);
2238 JvmtiDeferredEvent event = JvmtiDeferredEvent::dynamic_code_generated_event(
2239 name, code_begin, code_end);
2240 JvmtiDeferredEventQueue::enqueue(event);
2241 }
2242 }
2243
2244
2245 // post a DYNAMIC_CODE_GENERATED event for a given environment
2246 // used by GenerateEvents
2247 void JvmtiExport::post_dynamic_code_generated(JvmtiEnv* env, const char *name,
2248 const void *code_begin, const void *code_end)
2249 {
2250 JavaThread* thread = JavaThread::current();
2251 EVT_TRIG_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED,
2252 ("[%s] dynamic code generated event triggered (by GenerateEvents)",
2253 JvmtiTrace::safe_get_thread_name(thread)));
2254 if (env->is_enabled(JVMTI_EVENT_DYNAMIC_CODE_GENERATED)) {
2255 EVT_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED,
2256 ("[%s] dynamic code generated event sent for %s",
2257 JvmtiTrace::safe_get_thread_name(thread), name));
2258 JvmtiEventMark jem(thread);
2259 JvmtiJavaThreadEventTransition jet(thread);
2260 jint length = (jint)pointer_delta(code_end, code_begin, sizeof(char));
2261 jvmtiEventDynamicCodeGenerated callback = env->callbacks()->DynamicCodeGenerated;
2262 if (callback != NULL) {
2263 (*callback)(env->jvmti_external(), name, (void*)code_begin, length);
2264 }
2265 }
2266 }
2267
2268 // post a DynamicCodeGenerated event while holding locks in the VM.
2269 void JvmtiExport::post_dynamic_code_generated_while_holding_locks(const char* name,
2270 address code_begin, address code_end)
2271 {
2272 // register the stub with the current dynamic code event collector
2273 JvmtiThreadState* state = JvmtiThreadState::state_for(JavaThread::current());
2274 // state can only be NULL if the current thread is exiting which
2275 // should not happen since we're trying to post an event
2276 guarantee(state != NULL, "attempt to register stub via an exiting thread");
2277 JvmtiDynamicCodeEventCollector* collector = state->get_dynamic_code_event_collector();
2278 guarantee(collector != NULL, "attempt to register stub without event collector");
2279 collector->register_stub(name, code_begin, code_end);
2280 }
2281
2282 // Collect all the vm internally allocated objects which are visible to java world
2283 void JvmtiExport::record_vm_internal_object_allocation(oop obj) {
2284 Thread* thread = Thread::current_or_null();
2285 if (thread != NULL && thread->is_Java_thread()) {
2286 // Can not take safepoint here.
2287 NoSafepointVerifier no_sfpt;
2288 // Can not take safepoint here so can not use state_for to get
2289 // jvmti thread state.
2290 JvmtiThreadState *state = ((JavaThread*)thread)->jvmti_thread_state();
2291 if (state != NULL ) {
2292 // state is non NULL when VMObjectAllocEventCollector is enabled.
2293 JvmtiVMObjectAllocEventCollector *collector;
2294 collector = state->get_vm_object_alloc_event_collector();
2295 if (collector != NULL && collector->is_enabled()) {
2296 // Don't record classes as these will be notified via the ClassLoad
2297 // event.
2298 if (obj->klass() != SystemDictionary::Class_klass()) {
2299 collector->record_allocation(obj);
2300 }
2301 }
2302 }
2303 }
2304 }
2305
2306 void JvmtiExport::post_garbage_collection_finish() {
2307 Thread *thread = Thread::current(); // this event is posted from VM-Thread.
2308 EVT_TRIG_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH,
2309 ("[%s] garbage collection finish event triggered",
2310 JvmtiTrace::safe_get_thread_name(thread)));
2311 JvmtiEnvIterator it;
2312 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
2313 if (env->is_enabled(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH)) {
2314 EVT_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH,
2315 ("[%s] garbage collection finish event sent",
2316 JvmtiTrace::safe_get_thread_name(thread)));
2317 JvmtiThreadEventTransition jet(thread);
2318 // JNIEnv is NULL here because this event is posted from VM Thread
2319 jvmtiEventGarbageCollectionFinish callback = env->callbacks()->GarbageCollectionFinish;
2320 if (callback != NULL) {
2321 (*callback)(env->jvmti_external());
2322 }
2323 }
2324 }
2325 }
2326
2327 void JvmtiExport::post_garbage_collection_start() {
2328 Thread* thread = Thread::current(); // this event is posted from vm-thread.
2329 EVT_TRIG_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_START,
2330 ("[%s] garbage collection start event triggered",
2331 JvmtiTrace::safe_get_thread_name(thread)));
2332 JvmtiEnvIterator it;
2333 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
2334 if (env->is_enabled(JVMTI_EVENT_GARBAGE_COLLECTION_START)) {
2335 EVT_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_START,
2336 ("[%s] garbage collection start event sent",
2337 JvmtiTrace::safe_get_thread_name(thread)));
2338 JvmtiThreadEventTransition jet(thread);
2339 // JNIEnv is NULL here because this event is posted from VM Thread
2340 jvmtiEventGarbageCollectionStart callback = env->callbacks()->GarbageCollectionStart;
2341 if (callback != NULL) {
2342 (*callback)(env->jvmti_external());
2343 }
2344 }
2345 }
2346 }
2347
2348 void JvmtiExport::post_data_dump() {
2349 Thread *thread = Thread::current();
2350 EVT_TRIG_TRACE(JVMTI_EVENT_DATA_DUMP_REQUEST,
2351 ("[%s] data dump request event triggered",
2352 JvmtiTrace::safe_get_thread_name(thread)));
2353 JvmtiEnvIterator it;
2354 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
2355 if (env->is_enabled(JVMTI_EVENT_DATA_DUMP_REQUEST)) {
2356 EVT_TRACE(JVMTI_EVENT_DATA_DUMP_REQUEST,
2357 ("[%s] data dump request event sent",
2358 JvmtiTrace::safe_get_thread_name(thread)));
2359 JvmtiThreadEventTransition jet(thread);
2360 // JNIEnv is NULL here because this event is posted from VM Thread
2361 jvmtiEventDataDumpRequest callback = env->callbacks()->DataDumpRequest;
2362 if (callback != NULL) {
2363 (*callback)(env->jvmti_external());
2364 }
2365 }
2366 }
2367 }
2368
2369 void JvmtiExport::post_monitor_contended_enter(JavaThread *thread, ObjectMonitor *obj_mntr) {
2370 oop object = (oop)obj_mntr->object();
2371 JvmtiThreadState *state = thread->jvmti_thread_state();
2372 if (state == NULL) {
2373 return;
2374 }
2375
2376 HandleMark hm(thread);
2377 Handle h(thread, object);
2378
2379 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTER,
2380 ("[%s] montior contended enter event triggered",
2381 JvmtiTrace::safe_get_thread_name(thread)));
2382
2383 JvmtiEnvThreadStateIterator it(state);
2384 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
2385 if (ets->is_enabled(JVMTI_EVENT_MONITOR_CONTENDED_ENTER)) {
2386 EVT_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTER,
2387 ("[%s] monitor contended enter event sent",
2388 JvmtiTrace::safe_get_thread_name(thread)));
2389 JvmtiMonitorEventMark jem(thread, h());
2390 JvmtiEnv *env = ets->get_env();
2391 JvmtiThreadEventTransition jet(thread);
2392 jvmtiEventMonitorContendedEnter callback = env->callbacks()->MonitorContendedEnter;
2393 if (callback != NULL) {
2394 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_object());
2395 }
2396 }
2397 }
2398 }
2399
2400 void JvmtiExport::post_monitor_contended_entered(JavaThread *thread, ObjectMonitor *obj_mntr) {
2401 oop object = (oop)obj_mntr->object();
2402 JvmtiThreadState *state = thread->jvmti_thread_state();
2403 if (state == NULL) {
2404 return;
2405 }
2406
2407 HandleMark hm(thread);
2408 Handle h(thread, object);
2409
2410 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED,
2411 ("[%s] montior contended entered event triggered",
2412 JvmtiTrace::safe_get_thread_name(thread)));
2413
2414 JvmtiEnvThreadStateIterator it(state);
2415 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
2416 if (ets->is_enabled(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED)) {
2417 EVT_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED,
2418 ("[%s] monitor contended enter event sent",
2419 JvmtiTrace::safe_get_thread_name(thread)));
2420 JvmtiMonitorEventMark jem(thread, h());
2421 JvmtiEnv *env = ets->get_env();
2422 JvmtiThreadEventTransition jet(thread);
2423 jvmtiEventMonitorContendedEntered callback = env->callbacks()->MonitorContendedEntered;
2424 if (callback != NULL) {
2425 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_object());
2426 }
2427 }
2428 }
2429 }
2430
2431 void JvmtiExport::post_monitor_wait(JavaThread *thread, oop object,
2432 jlong timeout) {
2433 JvmtiThreadState *state = thread->jvmti_thread_state();
2434 if (state == NULL) {
2435 return;
2436 }
2437
2438 HandleMark hm(thread);
2439 Handle h(thread, object);
2440
2441 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_WAIT,
2442 ("[%s] montior wait event triggered",
2443 JvmtiTrace::safe_get_thread_name(thread)));
2444
2445 JvmtiEnvThreadStateIterator it(state);
2446 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
2447 if (ets->is_enabled(JVMTI_EVENT_MONITOR_WAIT)) {
2448 EVT_TRACE(JVMTI_EVENT_MONITOR_WAIT,
2449 ("[%s] monitor wait event sent",
2450 JvmtiTrace::safe_get_thread_name(thread)));
2451 JvmtiMonitorEventMark jem(thread, h());
2452 JvmtiEnv *env = ets->get_env();
2453 JvmtiThreadEventTransition jet(thread);
2454 jvmtiEventMonitorWait callback = env->callbacks()->MonitorWait;
2455 if (callback != NULL) {
2456 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
2457 jem.jni_object(), timeout);
2458 }
2459 }
2460 }
2461 }
2462
2463 void JvmtiExport::post_monitor_waited(JavaThread *thread, ObjectMonitor *obj_mntr, jboolean timed_out) {
2464 oop object = (oop)obj_mntr->object();
2465 JvmtiThreadState *state = thread->jvmti_thread_state();
2466 if (state == NULL) {
2467 return;
2468 }
2469
2470 HandleMark hm(thread);
2471 Handle h(thread, object);
2472
2473 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_WAITED,
2474 ("[%s] montior waited event triggered",
2475 JvmtiTrace::safe_get_thread_name(thread)));
2476
2477 JvmtiEnvThreadStateIterator it(state);
2478 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
2479 if (ets->is_enabled(JVMTI_EVENT_MONITOR_WAITED)) {
2480 EVT_TRACE(JVMTI_EVENT_MONITOR_WAITED,
2481 ("[%s] monitor waited event sent",
2482 JvmtiTrace::safe_get_thread_name(thread)));
2483 JvmtiMonitorEventMark jem(thread, h());
2484 JvmtiEnv *env = ets->get_env();
2485 JvmtiThreadEventTransition jet(thread);
2486 jvmtiEventMonitorWaited callback = env->callbacks()->MonitorWaited;
2487 if (callback != NULL) {
2488 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
2489 jem.jni_object(), timed_out);
2490 }
2491 }
2492 }
2493 }
2494
2495
2496 void JvmtiExport::post_vm_object_alloc(JavaThread *thread, oop object) {
2497 EVT_TRIG_TRACE(JVMTI_EVENT_VM_OBJECT_ALLOC, ("[%s] Trg vm object alloc triggered",
2498 JvmtiTrace::safe_get_thread_name(thread)));
2499 if (object == NULL) {
2500 return;
2501 }
2502 HandleMark hm(thread);
2503 Handle h(thread, object);
2504 JvmtiEnvIterator it;
2505 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
2506 if (env->is_enabled(JVMTI_EVENT_VM_OBJECT_ALLOC)) {
2507 EVT_TRACE(JVMTI_EVENT_VM_OBJECT_ALLOC, ("[%s] Evt vmobject alloc sent %s",
2508 JvmtiTrace::safe_get_thread_name(thread),
2509 object==NULL? "NULL" : object->klass()->external_name()));
2510
2511 JvmtiVMObjectAllocEventMark jem(thread, h());
2512 JvmtiJavaThreadEventTransition jet(thread);
2513 jvmtiEventVMObjectAlloc callback = env->callbacks()->VMObjectAlloc;
2514 if (callback != NULL) {
2515 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
2516 jem.jni_jobject(), jem.jni_class(), jem.size());
2517 }
2518 }
2519 }
2520 }
2521
2522 ////////////////////////////////////////////////////////////////////////////////////////////////
2523
2524 void JvmtiExport::cleanup_thread(JavaThread* thread) {
2525 assert(JavaThread::current() == thread, "thread is not current");
2526 MutexLocker mu(JvmtiThreadState_lock);
2527
2528 if (thread->jvmti_thread_state() != NULL) {
2529 // This has to happen after the thread state is removed, which is
2530 // why it is not in post_thread_end_event like its complement
2531 // Maybe both these functions should be rolled into the posts?
2532 JvmtiEventController::thread_ended(thread);
2533 }
2534 }
2535
2536 void JvmtiExport::clear_detected_exception(JavaThread* thread) {
2537 assert(JavaThread::current() == thread, "thread is not current");
2538
2539 JvmtiThreadState* state = thread->jvmti_thread_state();
2540 if (state != NULL) {
2541 state->clear_exception_state();
2542 }
2543 }
2544
2545 void JvmtiExport::oops_do(OopClosure* f) {
2546 JvmtiCurrentBreakpoints::oops_do(f);
2547 JvmtiVMObjectAllocEventCollector::oops_do_for_all_threads(f);
2548 }
2549
2550 void JvmtiExport::weak_oops_do(BoolObjectClosure* is_alive, OopClosure* f) {
2551 JvmtiTagMap::weak_oops_do(is_alive, f);
2552 }
2553
2554 void JvmtiExport::gc_epilogue() {
2555 JvmtiCurrentBreakpoints::gc_epilogue();
2556 }
2557
2558 // Onload raw monitor transition.
2559 void JvmtiExport::transition_pending_onload_raw_monitors() {
2560 JvmtiPendingMonitors::transition_raw_monitors();
2561 }
2562
2563 ////////////////////////////////////////////////////////////////////////////////////////////////
2564 #if INCLUDE_SERVICES
2565 // Attach is disabled if SERVICES is not included
2566
2567 // type for the Agent_OnAttach entry point
2568 extern "C" {
2569 typedef jint (JNICALL *OnAttachEntry_t)(JavaVM*, char *, void *);
2570 }
2571
2572 jint JvmtiExport::load_agent_library(const char *agent, const char *absParam,
2573 const char *options, outputStream* st) {
2574 char ebuf[1024] = {0};
2575 char buffer[JVM_MAXPATHLEN];
2576 void* library = NULL;
2577 jint result = JNI_ERR;
2578 const char *on_attach_symbols[] = AGENT_ONATTACH_SYMBOLS;
2579 size_t num_symbol_entries = ARRAY_SIZE(on_attach_symbols);
2580
2581 // The abs paramter should be "true" or "false"
2582 bool is_absolute_path = (absParam != NULL) && (strcmp(absParam,"true")==0);
2583
2584 // Initially marked as invalid. It will be set to valid if we can find the agent
2585 AgentLibrary *agent_lib = new AgentLibrary(agent, options, is_absolute_path, NULL);
2586
2587 // Check for statically linked in agent. If not found then if the path is
2588 // absolute we attempt to load the library. Otherwise we try to load it
2589 // from the standard dll directory.
2590
2591 if (!os::find_builtin_agent(agent_lib, on_attach_symbols, num_symbol_entries)) {
2592 if (is_absolute_path) {
2593 library = os::dll_load(agent, ebuf, sizeof ebuf);
2594 } else {
2595 // Try to load the agent from the standard dll directory
2596 if (os::dll_locate_lib(buffer, sizeof(buffer), Arguments::get_dll_dir(),
2597 agent)) {
2598 library = os::dll_load(buffer, ebuf, sizeof ebuf);
2599 }
2600 if (library == NULL) {
2601 // not found - try OS default library path
2602 if (os::dll_build_name(buffer, sizeof(buffer), agent)) {
2603 library = os::dll_load(buffer, ebuf, sizeof ebuf);
2604 }
2605 }
2606 }
2607 if (library != NULL) {
2608 agent_lib->set_os_lib(library);
2609 agent_lib->set_valid();
2610 }
2611 }
2612 // If the library was loaded then we attempt to invoke the Agent_OnAttach
2613 // function
2614 if (agent_lib->valid()) {
2615 // Lookup the Agent_OnAttach function
2616 OnAttachEntry_t on_attach_entry = NULL;
2617 on_attach_entry = CAST_TO_FN_PTR(OnAttachEntry_t,
2618 os::find_agent_function(agent_lib, false, on_attach_symbols, num_symbol_entries));
2619 if (on_attach_entry == NULL) {
2620 // Agent_OnAttach missing - unload library
2621 if (!agent_lib->is_static_lib()) {
2622 os::dll_unload(library);
2623 }
2624 st->print_cr("%s is not available in %s",
2625 on_attach_symbols[0], agent_lib->name());
2626 delete agent_lib;
2627 } else {
2628 // Invoke the Agent_OnAttach function
2629 JavaThread* THREAD = JavaThread::current();
2630 {
2631 extern struct JavaVM_ main_vm;
2632 JvmtiThreadEventMark jem(THREAD);
2633 JvmtiJavaThreadEventTransition jet(THREAD);
2634
2635 result = (*on_attach_entry)(&main_vm, (char*)options, NULL);
2636 }
2637
2638 // Agent_OnAttach may have used JNI
2639 if (HAS_PENDING_EXCEPTION) {
2640 CLEAR_PENDING_EXCEPTION;
2641 }
2642
2643 // If OnAttach returns JNI_OK then we add it to the list of
2644 // agent libraries so that we can call Agent_OnUnload later.
2645 if (result == JNI_OK) {
2646 Arguments::add_loaded_agent(agent_lib);
2647 } else {
2648 delete agent_lib;
2649 }
2650
2651 // Agent_OnAttach executed so completion status is JNI_OK
2652 st->print_cr("return code: %d", result);
2653 result = JNI_OK;
2654 }
2655 } else {
2656 st->print_cr("%s was not loaded.", agent);
2657 if (*ebuf != '\0') {
2658 st->print_cr("%s", ebuf);
2659 }
2660 }
2661 return result;
2662 }
2663
2664 #endif // INCLUDE_SERVICES
2665 ////////////////////////////////////////////////////////////////////////////////////////////////
2666
2667 // Setup current current thread for event collection.
2668 void JvmtiEventCollector::setup_jvmti_thread_state() {
2669 // set this event collector to be the current one.
2670 JvmtiThreadState* state = JvmtiThreadState::state_for(JavaThread::current());
2671 // state can only be NULL if the current thread is exiting which
2672 // should not happen since we're trying to configure for event collection
2673 guarantee(state != NULL, "exiting thread called setup_jvmti_thread_state");
2674 if (is_vm_object_alloc_event()) {
2675 _prev = state->get_vm_object_alloc_event_collector();
2676 state->set_vm_object_alloc_event_collector((JvmtiVMObjectAllocEventCollector *)this);
2677 } else if (is_dynamic_code_event()) {
2678 _prev = state->get_dynamic_code_event_collector();
2679 state->set_dynamic_code_event_collector((JvmtiDynamicCodeEventCollector *)this);
2680 }
2681 }
2682
2683 // Unset current event collection in this thread and reset it with previous
2684 // collector.
2685 void JvmtiEventCollector::unset_jvmti_thread_state() {
2686 JvmtiThreadState* state = JavaThread::current()->jvmti_thread_state();
2687 if (state != NULL) {
2688 // restore the previous event collector (if any)
2689 if (is_vm_object_alloc_event()) {
2690 if (state->get_vm_object_alloc_event_collector() == this) {
2691 state->set_vm_object_alloc_event_collector((JvmtiVMObjectAllocEventCollector *)_prev);
2692 } else {
2693 // this thread's jvmti state was created during the scope of
2694 // the event collector.
2695 }
2696 } else {
2697 if (is_dynamic_code_event()) {
2698 if (state->get_dynamic_code_event_collector() == this) {
2699 state->set_dynamic_code_event_collector((JvmtiDynamicCodeEventCollector *)_prev);
2700 } else {
2701 // this thread's jvmti state was created during the scope of
2702 // the event collector.
2703 }
2704 }
2705 }
2706 }
2707 }
2708
2709 // create the dynamic code event collector
2710 JvmtiDynamicCodeEventCollector::JvmtiDynamicCodeEventCollector() : _code_blobs(NULL) {
2711 if (JvmtiExport::should_post_dynamic_code_generated()) {
2712 setup_jvmti_thread_state();
2713 }
2714 }
2715
2716 // iterate over any code blob descriptors collected and post a
2717 // DYNAMIC_CODE_GENERATED event to the profiler.
2718 JvmtiDynamicCodeEventCollector::~JvmtiDynamicCodeEventCollector() {
2719 assert(!JavaThread::current()->owns_locks(), "all locks must be released to post deferred events");
2720 // iterate over any code blob descriptors that we collected
2721 if (_code_blobs != NULL) {
2722 for (int i=0; i<_code_blobs->length(); i++) {
2723 JvmtiCodeBlobDesc* blob = _code_blobs->at(i);
2724 JvmtiExport::post_dynamic_code_generated(blob->name(), blob->code_begin(), blob->code_end());
2725 FreeHeap(blob);
2726 }
2727 delete _code_blobs;
2728 }
2729 unset_jvmti_thread_state();
2730 }
2731
2732 // register a stub
2733 void JvmtiDynamicCodeEventCollector::register_stub(const char* name, address start, address end) {
2734 if (_code_blobs == NULL) {
2735 _code_blobs = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<JvmtiCodeBlobDesc*>(1,true);
2736 }
2737 _code_blobs->append(new JvmtiCodeBlobDesc(name, start, end));
2738 }
2739
2740 // Setup current thread to record vm allocated objects.
2741 JvmtiVMObjectAllocEventCollector::JvmtiVMObjectAllocEventCollector() : _allocated(NULL) {
2742 if (JvmtiExport::should_post_vm_object_alloc()) {
2743 _enable = true;
2744 setup_jvmti_thread_state();
2745 } else {
2746 _enable = false;
2747 }
2748 }
2749
2750 // Post vm_object_alloc event for vm allocated objects visible to java
2751 // world.
2752 JvmtiVMObjectAllocEventCollector::~JvmtiVMObjectAllocEventCollector() {
2753 if (_allocated != NULL) {
2754 set_enabled(false);
2755 for (int i = 0; i < _allocated->length(); i++) {
2756 oop obj = _allocated->at(i);
2757 JvmtiExport::post_vm_object_alloc(JavaThread::current(), obj);
2758 }
2759 delete _allocated;
2760 }
2761 unset_jvmti_thread_state();
2762 }
2763
2764 void JvmtiVMObjectAllocEventCollector::record_allocation(oop obj) {
2765 assert(is_enabled(), "VM object alloc event collector is not enabled");
2766 if (_allocated == NULL) {
2767 _allocated = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<oop>(1, true);
2768 }
2769 _allocated->push(obj);
2770 }
2771
2772 // GC support.
2773 void JvmtiVMObjectAllocEventCollector::oops_do(OopClosure* f) {
2774 if (_allocated != NULL) {
2775 for(int i=_allocated->length() - 1; i >= 0; i--) {
2776 if (_allocated->at(i) != NULL) {
2777 f->do_oop(_allocated->adr_at(i));
2778 }
2779 }
2780 }
2781 }
2782
2783 void JvmtiVMObjectAllocEventCollector::oops_do_for_all_threads(OopClosure* f) {
2784 // no-op if jvmti not enabled
2785 if (!JvmtiEnv::environments_might_exist()) {
2786 return;
2787 }
2788
2789 for (JavaThreadIteratorWithHandle jtiwh; JavaThread *jthr = jtiwh.next(); ) {
2790 JvmtiThreadState *state = jthr->jvmti_thread_state();
2791 if (state != NULL) {
2792 JvmtiVMObjectAllocEventCollector *collector;
2793 collector = state->get_vm_object_alloc_event_collector();
2794 while (collector != NULL) {
2795 collector->oops_do(f);
2796 collector = (JvmtiVMObjectAllocEventCollector *)collector->get_prev();
2797 }
2798 }
2799 }
2800 }
2801
2802
2803 // Disable collection of VMObjectAlloc events
2804 NoJvmtiVMObjectAllocMark::NoJvmtiVMObjectAllocMark() : _collector(NULL) {
2805 // a no-op if VMObjectAlloc event is not enabled
2806 if (!JvmtiExport::should_post_vm_object_alloc()) {
2807 return;
2808 }
2809 Thread* thread = Thread::current_or_null();
2810 if (thread != NULL && thread->is_Java_thread()) {
2811 JavaThread* current_thread = (JavaThread*)thread;
2812 JvmtiThreadState *state = current_thread->jvmti_thread_state();
2813 if (state != NULL) {
2814 JvmtiVMObjectAllocEventCollector *collector;
2815 collector = state->get_vm_object_alloc_event_collector();
2816 if (collector != NULL && collector->is_enabled()) {
2817 _collector = collector;
2818 _collector->set_enabled(false);
2819 }
2820 }
2821 }
2822 }
2823
2824 // Re-Enable collection of VMObjectAlloc events (if previously enabled)
2825 NoJvmtiVMObjectAllocMark::~NoJvmtiVMObjectAllocMark() {
2826 if (was_enabled()) {
2827 _collector->set_enabled(true);
2828 }
2829 };
2830
2831 JvmtiGCMarker::JvmtiGCMarker() {
2832 // if there aren't any JVMTI environments then nothing to do
2833 if (!JvmtiEnv::environments_might_exist()) {
2834 return;
2835 }
2836
2837 if (JvmtiExport::should_post_garbage_collection_start()) {
2838 JvmtiExport::post_garbage_collection_start();
2839 }
2840
2841 if (SafepointSynchronize::is_at_safepoint()) {
2842 // Do clean up tasks that need to be done at a safepoint
2843 JvmtiEnvBase::check_for_periodic_clean_up();
2844 }
2845 }
2846
2847 JvmtiGCMarker::~JvmtiGCMarker() {
2848 // if there aren't any JVMTI environments then nothing to do
2849 if (!JvmtiEnv::environments_might_exist()) {
2850 return;
2851 }
2852
2853 // JVMTI notify gc finish
2854 if (JvmtiExport::should_post_garbage_collection_finish()) {
2855 JvmtiExport::post_garbage_collection_finish();
2856 }
2857 }