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/fieldDescriptor.inline.hpp"
51 #include "runtime/handles.hpp"
52 #include "runtime/interfaceSupport.inline.hpp"
53 #include "runtime/javaCalls.hpp"
54 #include "runtime/jniHandles.inline.hpp"
55 #include "runtime/objectMonitor.hpp"
56 #include "runtime/objectMonitor.inline.hpp"
57 #include "runtime/os.inline.hpp"
58 #include "runtime/safepointVerifiers.hpp"
59 #include "runtime/thread.inline.hpp"
60 #include "runtime/threadSMR.hpp"
61 #include "runtime/vframe.inline.hpp"
62 #include "utilities/macros.hpp"
63
64 #ifdef JVMTI_TRACE
65 #define EVT_TRACE(evt,out) if ((JvmtiTrace::event_trace_flags(evt) & JvmtiTrace::SHOW_EVENT_SENT) != 0) { SafeResourceMark rm; log_trace(jvmti) out; }
66 #define EVT_TRIG_TRACE(evt,out) if ((JvmtiTrace::event_trace_flags(evt) & JvmtiTrace::SHOW_EVENT_TRIGGER) != 0) { SafeResourceMark rm; log_trace(jvmti) out; }
67 #else
68 #define EVT_TRIG_TRACE(evt,out)
69 #define EVT_TRACE(evt,out)
70 #endif
71
72 ///////////////////////////////////////////////////////////////
73 //
74 // JvmtiEventTransition
75 //
76 // TO DO --
77 // more handle purging
78
79 // Use this for JavaThreads and state is _thread_in_vm.
80 class JvmtiJavaThreadEventTransition : StackObj {
81 private:
82 ResourceMark _rm;
83 ThreadToNativeFromVM _transition;
84 HandleMark _hm;
85
86 public:
87 JvmtiJavaThreadEventTransition(JavaThread *thread) :
88 _rm(),
89 _transition(thread),
90 _hm(thread) {};
91 };
92
93 // For JavaThreads which are not in _thread_in_vm state
94 // and other system threads use this.
95 class JvmtiThreadEventTransition : StackObj {
96 private:
97 ResourceMark _rm;
98 HandleMark _hm;
99 JavaThreadState _saved_state;
100 JavaThread *_jthread;
101
102 public:
103 JvmtiThreadEventTransition(Thread *thread) : _rm(), _hm() {
104 if (thread->is_Java_thread()) {
105 _jthread = (JavaThread *)thread;
106 _saved_state = _jthread->thread_state();
107 if (_saved_state == _thread_in_Java) {
108 ThreadStateTransition::transition_from_java(_jthread, _thread_in_native);
109 } else {
110 ThreadStateTransition::transition(_jthread, _saved_state, _thread_in_native);
111 }
112 } else {
113 _jthread = NULL;
114 }
115 }
116
117 ~JvmtiThreadEventTransition() {
118 if (_jthread != NULL)
119 ThreadStateTransition::transition_from_native(_jthread, _saved_state);
120 }
121 };
122
123
124 ///////////////////////////////////////////////////////////////
125 //
126 // JvmtiEventMark
127 //
128
129 class JvmtiEventMark : public StackObj {
130 private:
131 JavaThread *_thread;
132 JNIEnv* _jni_env;
133 JvmtiThreadState::ExceptionState _saved_exception_state;
134 #if 0
135 JNIHandleBlock* _hblock;
136 #endif
137
138 public:
139 JvmtiEventMark(JavaThread *thread) : _thread(thread),
140 _jni_env(thread->jni_environment()),
141 _saved_exception_state(JvmtiThreadState::ES_CLEARED) {
142 #if 0
143 _hblock = thread->active_handles();
144 _hblock->clear_thoroughly(); // so we can be safe
145 #else
146 // we want to use the code above - but that needs the JNIHandle changes - later...
147 // for now, steal JNI push local frame code
148 JvmtiThreadState *state = thread->jvmti_thread_state();
149 // we are before an event.
150 // Save current jvmti thread exception state.
151 if (state != NULL) {
152 _saved_exception_state = state->get_exception_state();
153 }
154
155 JNIHandleBlock* old_handles = thread->active_handles();
156 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread);
157 assert(new_handles != NULL, "should not be NULL");
158 new_handles->set_pop_frame_link(old_handles);
159 thread->set_active_handles(new_handles);
160 #endif
161 assert(thread == JavaThread::current(), "thread must be current!");
162 thread->frame_anchor()->make_walkable(thread);
163 };
164
165 ~JvmtiEventMark() {
166 #if 0
167 _hblock->clear(); // for consistency with future correct behavior
168 #else
169 // we want to use the code above - but that needs the JNIHandle changes - later...
170 // for now, steal JNI pop local frame code
171 JNIHandleBlock* old_handles = _thread->active_handles();
172 JNIHandleBlock* new_handles = old_handles->pop_frame_link();
173 assert(new_handles != NULL, "should not be NULL");
174 _thread->set_active_handles(new_handles);
175 // Note that we set the pop_frame_link to NULL explicitly, otherwise
176 // the release_block call will release the blocks.
177 old_handles->set_pop_frame_link(NULL);
178 JNIHandleBlock::release_block(old_handles, _thread); // may block
179 #endif
180
181 JvmtiThreadState* state = _thread->jvmti_thread_state();
182 // we are continuing after an event.
183 if (state != NULL) {
184 // Restore the jvmti thread exception state.
185 state->restore_exception_state(_saved_exception_state);
186 }
187 }
188
189 #if 0
190 jobject to_jobject(oop obj) { return obj == NULL? NULL : _hblock->allocate_handle_fast(obj); }
191 #else
192 // we want to use the code above - but that needs the JNIHandle changes - later...
193 // for now, use regular make_local
194 jobject to_jobject(oop obj) { return JNIHandles::make_local(_thread,obj); }
195 #endif
196
197 jclass to_jclass(Klass* klass) { return (klass == NULL ? NULL : (jclass)to_jobject(klass->java_mirror())); }
198
199 jmethodID to_jmethodID(const methodHandle& method) { return method->jmethod_id(); }
200
201 JNIEnv* jni_env() { return _jni_env; }
202 };
203
204 class JvmtiThreadEventMark : public JvmtiEventMark {
205 private:
206 jthread _jt;
207
208 public:
209 JvmtiThreadEventMark(JavaThread *thread) :
210 JvmtiEventMark(thread) {
211 _jt = (jthread)(to_jobject(thread->threadObj()));
212 };
213 jthread jni_thread() { return _jt; }
214 };
215
216 class JvmtiClassEventMark : public JvmtiThreadEventMark {
217 private:
218 jclass _jc;
219
220 public:
221 JvmtiClassEventMark(JavaThread *thread, Klass* klass) :
222 JvmtiThreadEventMark(thread) {
223 _jc = to_jclass(klass);
224 };
225 jclass jni_class() { return _jc; }
226 };
227
228 class JvmtiMethodEventMark : public JvmtiThreadEventMark {
229 private:
230 jmethodID _mid;
231
232 public:
233 JvmtiMethodEventMark(JavaThread *thread, const methodHandle& method) :
234 JvmtiThreadEventMark(thread),
235 _mid(to_jmethodID(method)) {};
236 jmethodID jni_methodID() { return _mid; }
237 };
238
239 class JvmtiLocationEventMark : public JvmtiMethodEventMark {
240 private:
241 jlocation _loc;
242
243 public:
244 JvmtiLocationEventMark(JavaThread *thread, const methodHandle& method, address location) :
245 JvmtiMethodEventMark(thread, method),
246 _loc(location - method->code_base()) {};
247 jlocation location() { return _loc; }
248 };
249
250 class JvmtiExceptionEventMark : public JvmtiLocationEventMark {
251 private:
252 jobject _exc;
253
254 public:
255 JvmtiExceptionEventMark(JavaThread *thread, const methodHandle& method, address location, Handle exception) :
256 JvmtiLocationEventMark(thread, method, location),
257 _exc(to_jobject(exception())) {};
258 jobject exception() { return _exc; }
259 };
260
261 class JvmtiClassFileLoadEventMark : public JvmtiThreadEventMark {
262 private:
263 const char *_class_name;
264 jobject _jloader;
265 jobject _protection_domain;
266 jclass _class_being_redefined;
267
268 public:
269 JvmtiClassFileLoadEventMark(JavaThread *thread, Symbol* name,
270 Handle class_loader, Handle prot_domain, Klass* class_being_redefined) : JvmtiThreadEventMark(thread) {
271 _class_name = name != NULL? name->as_utf8() : NULL;
272 _jloader = (jobject)to_jobject(class_loader());
273 _protection_domain = (jobject)to_jobject(prot_domain());
274 if (class_being_redefined == NULL) {
275 _class_being_redefined = NULL;
276 } else {
277 _class_being_redefined = (jclass)to_jclass(class_being_redefined);
278 }
279 };
280 const char *class_name() {
281 return _class_name;
282 }
283 jobject jloader() {
284 return _jloader;
285 }
286 jobject protection_domain() {
287 return _protection_domain;
288 }
289 jclass class_being_redefined() {
290 return _class_being_redefined;
291 }
292 };
293
294 //////////////////////////////////////////////////////////////////////////////
295
296 int JvmtiExport::_field_access_count = 0;
297 int JvmtiExport::_field_modification_count = 0;
298
299 bool JvmtiExport::_can_access_local_variables = false;
300 bool JvmtiExport::_can_hotswap_or_post_breakpoint = false;
301 bool JvmtiExport::_can_modify_any_class = false;
302 bool JvmtiExport::_can_walk_any_space = false;
303
304 bool JvmtiExport::_has_redefined_a_class = false;
305 bool JvmtiExport::_all_dependencies_are_recorded = false;
306
307 //
308 // field access management
309 //
310
311 // interpreter generator needs the address of the counter
312 address JvmtiExport::get_field_access_count_addr() {
313 // We don't grab a lock because we don't want to
314 // serialize field access between all threads. This means that a
315 // thread on another processor can see the wrong count value and
316 // may either miss making a needed call into post_field_access()
317 // or will make an unneeded call into post_field_access(). We pay
318 // this price to avoid slowing down the VM when we aren't watching
319 // field accesses.
320 // Other access/mutation safe by virtue of being in VM state.
321 return (address)(&_field_access_count);
322 }
323
324 //
325 // field modification management
326 //
327
328 // interpreter generator needs the address of the counter
329 address JvmtiExport::get_field_modification_count_addr() {
330 // We don't grab a lock because we don't
331 // want to serialize field modification between all threads. This
332 // means that a thread on another processor can see the wrong
333 // count value and may either miss making a needed call into
334 // post_field_modification() or will make an unneeded call into
335 // post_field_modification(). We pay this price to avoid slowing
336 // down the VM when we aren't watching field modifications.
337 // Other access/mutation safe by virtue of being in VM state.
338 return (address)(&_field_modification_count);
339 }
340
341
342 ///////////////////////////////////////////////////////////////
343 // Functions needed by java.lang.instrument for starting up javaagent.
344 ///////////////////////////////////////////////////////////////
345
346 jint
347 JvmtiExport::get_jvmti_interface(JavaVM *jvm, void **penv, jint version) {
348 // The JVMTI_VERSION_INTERFACE_JVMTI part of the version number
349 // has already been validated in JNI GetEnv().
350 int major, minor, micro;
351
352 // micro version doesn't matter here (yet?)
353 decode_version_values(version, &major, &minor, µ);
354 switch (major) {
355 case 1:
356 switch (minor) {
357 case 0: // version 1.0.<micro> is recognized
358 case 1: // version 1.1.<micro> is recognized
359 case 2: // version 1.2.<micro> is recognized
360 break;
361
362 default:
363 return JNI_EVERSION; // unsupported minor version number
364 }
365 break;
366 case 9:
367 switch (minor) {
368 case 0: // version 9.0.<micro> is recognized
369 break;
370 default:
371 return JNI_EVERSION; // unsupported minor version number
372 }
373 break;
374 case 11:
375 switch (minor) {
376 case 0: // version 11.0.<micro> is recognized
377 break;
378 default:
379 return JNI_EVERSION; // unsupported minor version number
380 }
381 break;
382 default:
383 return JNI_EVERSION; // unsupported major version number
384 }
385
386 if (JvmtiEnv::get_phase() == JVMTI_PHASE_LIVE) {
387 JavaThread* current_thread = JavaThread::current();
388 // transition code: native to VM
389 ThreadInVMfromNative __tiv(current_thread);
390 VM_ENTRY_BASE(jvmtiEnv*, JvmtiExport::get_jvmti_interface, current_thread)
391 debug_only(VMNativeEntryWrapper __vew;)
392
393 JvmtiEnv *jvmti_env = JvmtiEnv::create_a_jvmti(version);
394 *penv = jvmti_env->jvmti_external(); // actual type is jvmtiEnv* -- not to be confused with JvmtiEnv*
395 return JNI_OK;
396
397 } else if (JvmtiEnv::get_phase() == JVMTI_PHASE_ONLOAD) {
398 // not live, no thread to transition
399 JvmtiEnv *jvmti_env = JvmtiEnv::create_a_jvmti(version);
400 *penv = jvmti_env->jvmti_external(); // actual type is jvmtiEnv* -- not to be confused with JvmtiEnv*
401 return JNI_OK;
402
403 } else {
404 // Called at the wrong time
405 *penv = NULL;
406 return JNI_EDETACHED;
407 }
408 }
409
410 void
411 JvmtiExport::add_default_read_edges(Handle h_module, TRAPS) {
412 if (!Universe::is_module_initialized()) {
413 return; // extra safety
414 }
415 assert(!h_module.is_null(), "module should always be set");
416
417 // Invoke the transformedByAgent method
418 JavaValue result(T_VOID);
419 JavaCalls::call_static(&result,
420 SystemDictionary::module_Modules_klass(),
421 vmSymbols::transformedByAgent_name(),
422 vmSymbols::transformedByAgent_signature(),
423 h_module,
424 THREAD);
425
426 if (HAS_PENDING_EXCEPTION) {
427 LogTarget(Trace, jvmti) log;
428 LogStream log_stream(log);
429 java_lang_Throwable::print(PENDING_EXCEPTION, &log_stream);
430 log_stream.cr();
431 CLEAR_PENDING_EXCEPTION;
432 return;
433 }
434 }
435
436 jvmtiError
437 JvmtiExport::add_module_reads(Handle module, Handle to_module, TRAPS) {
438 if (!Universe::is_module_initialized()) {
439 return JVMTI_ERROR_NONE; // extra safety
440 }
441 assert(!module.is_null(), "module should always be set");
442 assert(!to_module.is_null(), "to_module should always be set");
443
444 // Invoke the addReads method
445 JavaValue result(T_VOID);
446 JavaCalls::call_static(&result,
447 SystemDictionary::module_Modules_klass(),
448 vmSymbols::addReads_name(),
449 vmSymbols::addReads_signature(),
450 module,
451 to_module,
452 THREAD);
453
454 if (HAS_PENDING_EXCEPTION) {
455 LogTarget(Trace, jvmti) log;
456 LogStream log_stream(log);
457 java_lang_Throwable::print(PENDING_EXCEPTION, &log_stream);
458 log_stream.cr();
459 CLEAR_PENDING_EXCEPTION;
460 return JVMTI_ERROR_INTERNAL;
461 }
462 return JVMTI_ERROR_NONE;
463 }
464
465 jvmtiError
466 JvmtiExport::add_module_exports(Handle module, Handle pkg_name, Handle to_module, TRAPS) {
467 if (!Universe::is_module_initialized()) {
468 return JVMTI_ERROR_NONE; // extra safety
469 }
470 assert(!module.is_null(), "module should always be set");
471 assert(!to_module.is_null(), "to_module should always be set");
472 assert(!pkg_name.is_null(), "pkg_name should always be set");
473
474 // Invoke the addExports method
475 JavaValue result(T_VOID);
476 JavaCalls::call_static(&result,
477 SystemDictionary::module_Modules_klass(),
478 vmSymbols::addExports_name(),
479 vmSymbols::addExports_signature(),
480 module,
481 pkg_name,
482 to_module,
483 THREAD);
484
485 if (HAS_PENDING_EXCEPTION) {
486 Symbol* ex_name = PENDING_EXCEPTION->klass()->name();
487 LogTarget(Trace, jvmti) log;
488 LogStream log_stream(log);
489 java_lang_Throwable::print(PENDING_EXCEPTION, &log_stream);
490 log_stream.cr();
491 CLEAR_PENDING_EXCEPTION;
492 if (ex_name == vmSymbols::java_lang_IllegalArgumentException()) {
493 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
494 }
495 return JVMTI_ERROR_INTERNAL;
496 }
497 return JVMTI_ERROR_NONE;
498 }
499
500 jvmtiError
501 JvmtiExport::add_module_opens(Handle module, Handle pkg_name, Handle to_module, TRAPS) {
502 if (!Universe::is_module_initialized()) {
503 return JVMTI_ERROR_NONE; // extra safety
504 }
505 assert(!module.is_null(), "module should always be set");
506 assert(!to_module.is_null(), "to_module should always be set");
507 assert(!pkg_name.is_null(), "pkg_name should always be set");
508
509 // Invoke the addOpens method
510 JavaValue result(T_VOID);
511 JavaCalls::call_static(&result,
512 SystemDictionary::module_Modules_klass(),
513 vmSymbols::addOpens_name(),
514 vmSymbols::addExports_signature(),
515 module,
516 pkg_name,
517 to_module,
518 THREAD);
519
520 if (HAS_PENDING_EXCEPTION) {
521 Symbol* ex_name = PENDING_EXCEPTION->klass()->name();
522 LogTarget(Trace, jvmti) log;
523 LogStream log_stream(log);
524 java_lang_Throwable::print(PENDING_EXCEPTION, &log_stream);
525 log_stream.cr();
526 CLEAR_PENDING_EXCEPTION;
527 if (ex_name == vmSymbols::java_lang_IllegalArgumentException()) {
528 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
529 }
530 return JVMTI_ERROR_INTERNAL;
531 }
532 return JVMTI_ERROR_NONE;
533 }
534
535 jvmtiError
536 JvmtiExport::add_module_uses(Handle module, Handle service, TRAPS) {
537 if (!Universe::is_module_initialized()) {
538 return JVMTI_ERROR_NONE; // extra safety
539 }
540 assert(!module.is_null(), "module should always be set");
541 assert(!service.is_null(), "service should always be set");
542
543 // Invoke the addUses method
544 JavaValue result(T_VOID);
545 JavaCalls::call_static(&result,
546 SystemDictionary::module_Modules_klass(),
547 vmSymbols::addUses_name(),
548 vmSymbols::addUses_signature(),
549 module,
550 service,
551 THREAD);
552
553 if (HAS_PENDING_EXCEPTION) {
554 LogTarget(Trace, jvmti) log;
555 LogStream log_stream(log);
556 java_lang_Throwable::print(PENDING_EXCEPTION, &log_stream);
557 log_stream.cr();
558 CLEAR_PENDING_EXCEPTION;
559 return JVMTI_ERROR_INTERNAL;
560 }
561 return JVMTI_ERROR_NONE;
562 }
563
564 jvmtiError
565 JvmtiExport::add_module_provides(Handle module, Handle service, Handle impl_class, TRAPS) {
566 if (!Universe::is_module_initialized()) {
567 return JVMTI_ERROR_NONE; // extra safety
568 }
569 assert(!module.is_null(), "module should always be set");
570 assert(!service.is_null(), "service should always be set");
571 assert(!impl_class.is_null(), "impl_class should always be set");
572
573 // Invoke the addProvides method
574 JavaValue result(T_VOID);
575 JavaCalls::call_static(&result,
576 SystemDictionary::module_Modules_klass(),
577 vmSymbols::addProvides_name(),
578 vmSymbols::addProvides_signature(),
579 module,
580 service,
581 impl_class,
582 THREAD);
583
584 if (HAS_PENDING_EXCEPTION) {
585 LogTarget(Trace, jvmti) log;
586 LogStream log_stream(log);
587 java_lang_Throwable::print(PENDING_EXCEPTION, &log_stream);
588 log_stream.cr();
589 CLEAR_PENDING_EXCEPTION;
590 return JVMTI_ERROR_INTERNAL;
591 }
592 return JVMTI_ERROR_NONE;
593 }
594
595 void
596 JvmtiExport::decode_version_values(jint version, int * major, int * minor,
597 int * micro) {
598 *major = (version & JVMTI_VERSION_MASK_MAJOR) >> JVMTI_VERSION_SHIFT_MAJOR;
599 *minor = (version & JVMTI_VERSION_MASK_MINOR) >> JVMTI_VERSION_SHIFT_MINOR;
600 *micro = (version & JVMTI_VERSION_MASK_MICRO) >> JVMTI_VERSION_SHIFT_MICRO;
601 }
602
603 void JvmtiExport::enter_primordial_phase() {
604 JvmtiEnvBase::set_phase(JVMTI_PHASE_PRIMORDIAL);
605 }
606
607 void JvmtiExport::enter_early_start_phase() {
608 set_early_vmstart_recorded(true);
609 }
610
611 void JvmtiExport::enter_start_phase() {
612 JvmtiEnvBase::set_phase(JVMTI_PHASE_START);
613 }
614
615 void JvmtiExport::enter_onload_phase() {
616 JvmtiEnvBase::set_phase(JVMTI_PHASE_ONLOAD);
617 }
618
619 void JvmtiExport::enter_live_phase() {
620 JvmtiEnvBase::set_phase(JVMTI_PHASE_LIVE);
621 }
622
623 //
624 // JVMTI events that the VM posts to the debugger and also startup agent
625 // and call the agent's premain() for java.lang.instrument.
626 //
627
628 void JvmtiExport::post_early_vm_start() {
629 EVT_TRIG_TRACE(JVMTI_EVENT_VM_START, ("Trg Early VM start event triggered" ));
630
631 // can now enable some events
632 JvmtiEventController::vm_start();
633
634 JvmtiEnvIterator it;
635 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
636 // Only early vmstart envs post early VMStart event
637 if (env->early_vmstart_env() && env->is_enabled(JVMTI_EVENT_VM_START)) {
638 EVT_TRACE(JVMTI_EVENT_VM_START, ("Evt Early VM start event sent" ));
639 JavaThread *thread = JavaThread::current();
640 JvmtiThreadEventMark jem(thread);
641 JvmtiJavaThreadEventTransition jet(thread);
642 jvmtiEventVMStart callback = env->callbacks()->VMStart;
643 if (callback != NULL) {
644 (*callback)(env->jvmti_external(), jem.jni_env());
645 }
646 }
647 }
648 }
649
650 void JvmtiExport::post_vm_start() {
651 EVT_TRIG_TRACE(JVMTI_EVENT_VM_START, ("Trg VM start event triggered" ));
652
653 // can now enable some events
654 JvmtiEventController::vm_start();
655
656 JvmtiEnvIterator it;
657 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
658 // Early vmstart envs do not post normal VMStart event
659 if (!env->early_vmstart_env() && env->is_enabled(JVMTI_EVENT_VM_START)) {
660 EVT_TRACE(JVMTI_EVENT_VM_START, ("Evt VM start event sent" ));
661
662 JavaThread *thread = JavaThread::current();
663 JvmtiThreadEventMark jem(thread);
664 JvmtiJavaThreadEventTransition jet(thread);
665 jvmtiEventVMStart callback = env->callbacks()->VMStart;
666 if (callback != NULL) {
667 (*callback)(env->jvmti_external(), jem.jni_env());
668 }
669 }
670 }
671 }
672
673
674 void JvmtiExport::post_vm_initialized() {
675 EVT_TRIG_TRACE(JVMTI_EVENT_VM_INIT, ("Trg VM init event triggered" ));
676
677 // can now enable events
678 JvmtiEventController::vm_init();
679
680 JvmtiEnvIterator it;
681 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
682 if (env->is_enabled(JVMTI_EVENT_VM_INIT)) {
683 EVT_TRACE(JVMTI_EVENT_VM_INIT, ("Evt VM init event sent" ));
684
685 JavaThread *thread = JavaThread::current();
686 JvmtiThreadEventMark jem(thread);
687 JvmtiJavaThreadEventTransition jet(thread);
688 jvmtiEventVMInit callback = env->callbacks()->VMInit;
689 if (callback != NULL) {
690 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread());
691 }
692 }
693 }
694 }
695
696
697 void JvmtiExport::post_vm_death() {
698 EVT_TRIG_TRACE(JVMTI_EVENT_VM_DEATH, ("Trg VM death event triggered" ));
699
700 JvmtiEnvIterator it;
701 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
702 if (env->is_enabled(JVMTI_EVENT_VM_DEATH)) {
703 EVT_TRACE(JVMTI_EVENT_VM_DEATH, ("Evt VM death event sent" ));
704
705 JavaThread *thread = JavaThread::current();
706 JvmtiEventMark jem(thread);
707 JvmtiJavaThreadEventTransition jet(thread);
708 jvmtiEventVMDeath callback = env->callbacks()->VMDeath;
709 if (callback != NULL) {
710 (*callback)(env->jvmti_external(), jem.jni_env());
711 }
712 }
713 }
714
715 JvmtiEnvBase::set_phase(JVMTI_PHASE_DEAD);
716 JvmtiEventController::vm_death();
717 }
718
719 char**
720 JvmtiExport::get_all_native_method_prefixes(int* count_ptr) {
721 // Have to grab JVMTI thread state lock to be sure environment doesn't
722 // go away while we iterate them. No locks during VM bring-up.
723 if (Threads::number_of_threads() == 0 || SafepointSynchronize::is_at_safepoint()) {
724 return JvmtiEnvBase::get_all_native_method_prefixes(count_ptr);
725 } else {
726 MutexLocker mu(JvmtiThreadState_lock);
727 return JvmtiEnvBase::get_all_native_method_prefixes(count_ptr);
728 }
729 }
730
731 // Convert an external thread reference to a JavaThread found on the
732 // specified ThreadsList. The ThreadsListHandle in the caller "protects"
733 // the returned JavaThread *.
734 //
735 // If thread_oop_p is not NULL, then the caller wants to use the oop
736 // after this call so the oop is returned. On success, *jt_pp is set
737 // to the converted JavaThread * and JVMTI_ERROR_NONE is returned.
738 // On error, returns various JVMTI_ERROR_* values.
739 //
740 jvmtiError
741 JvmtiExport::cv_external_thread_to_JavaThread(ThreadsList * t_list,
742 jthread thread,
743 JavaThread ** jt_pp,
744 oop * thread_oop_p) {
745 assert(t_list != NULL, "must have a ThreadsList");
746 assert(jt_pp != NULL, "must have a return JavaThread pointer");
747 // thread_oop_p is optional so no assert()
748
749 oop thread_oop = JNIHandles::resolve_external_guard(thread);
750 if (thread_oop == NULL) {
751 // NULL jthread, GC'ed jthread or a bad JNI handle.
752 return JVMTI_ERROR_INVALID_THREAD;
753 }
754 // Looks like an oop at this point.
755
756 if (!thread_oop->is_a(SystemDictionary::Thread_klass())) {
757 // The oop is not a java.lang.Thread.
758 return JVMTI_ERROR_INVALID_THREAD;
759 }
760 // Looks like a java.lang.Thread oop at this point.
761
762 if (thread_oop_p != NULL) {
763 // Return the oop to the caller; the caller may still want
764 // the oop even if this function returns an error.
765 *thread_oop_p = thread_oop;
766 }
767
768 JavaThread * java_thread = java_lang_Thread::thread(thread_oop);
769 if (java_thread == NULL) {
770 // The java.lang.Thread does not contain a JavaThread * so it has
771 // not yet run or it has died.
772 return JVMTI_ERROR_THREAD_NOT_ALIVE;
773 }
774 // Looks like a live JavaThread at this point.
775
776 // We do not check the EnableThreadSMRExtraValidityChecks option
777 // for this includes() call because JVM/TI's spec is tighter.
778 if (!t_list->includes(java_thread)) {
779 // Not on the JavaThreads list so it is not alive.
780 return JVMTI_ERROR_THREAD_NOT_ALIVE;
781 }
782
783 // Return a live JavaThread that is "protected" by the
784 // ThreadsListHandle in the caller.
785 *jt_pp = java_thread;
786
787 return JVMTI_ERROR_NONE;
788 }
789
790 // Convert an oop to a JavaThread found on the specified ThreadsList.
791 // The ThreadsListHandle in the caller "protects" the returned
792 // JavaThread *.
793 //
794 // On success, *jt_pp is set to the converted JavaThread * and
795 // JVMTI_ERROR_NONE is returned. On error, returns various
796 // JVMTI_ERROR_* values.
797 //
798 jvmtiError
799 JvmtiExport::cv_oop_to_JavaThread(ThreadsList * t_list, oop thread_oop,
800 JavaThread ** jt_pp) {
801 assert(t_list != NULL, "must have a ThreadsList");
802 assert(thread_oop != NULL, "must have an oop");
803 assert(jt_pp != NULL, "must have a return JavaThread pointer");
804
805 if (!thread_oop->is_a(SystemDictionary::Thread_klass())) {
806 // The oop is not a java.lang.Thread.
807 return JVMTI_ERROR_INVALID_THREAD;
808 }
809 // Looks like a java.lang.Thread oop at this point.
810
811 JavaThread * java_thread = java_lang_Thread::thread(thread_oop);
812 if (java_thread == NULL) {
813 // The java.lang.Thread does not contain a JavaThread * so it has
814 // not yet run or it has died.
815 return JVMTI_ERROR_THREAD_NOT_ALIVE;
816 }
817 // Looks like a live JavaThread at this point.
818
819 // We do not check the EnableThreadSMRExtraValidityChecks option
820 // for this includes() call because JVM/TI's spec is tighter.
821 if (!t_list->includes(java_thread)) {
822 // Not on the JavaThreads list so it is not alive.
823 return JVMTI_ERROR_THREAD_NOT_ALIVE;
824 }
825
826 // Return a live JavaThread that is "protected" by the
827 // ThreadsListHandle in the caller.
828 *jt_pp = java_thread;
829
830 return JVMTI_ERROR_NONE;
831 }
832
833 class JvmtiClassFileLoadHookPoster : public StackObj {
834 private:
835 Symbol* _h_name;
836 Handle _class_loader;
837 Handle _h_protection_domain;
838 unsigned char ** _data_ptr;
839 unsigned char ** _end_ptr;
840 JavaThread * _thread;
841 jint _curr_len;
842 unsigned char * _curr_data;
843 JvmtiEnv * _curr_env;
844 JvmtiCachedClassFileData ** _cached_class_file_ptr;
845 JvmtiThreadState * _state;
846 Klass* _class_being_redefined;
847 JvmtiClassLoadKind _load_kind;
848 bool _has_been_modified;
849
850 public:
851 inline JvmtiClassFileLoadHookPoster(Symbol* h_name, Handle class_loader,
852 Handle h_protection_domain,
853 unsigned char **data_ptr, unsigned char **end_ptr,
854 JvmtiCachedClassFileData **cache_ptr) {
855 _h_name = h_name;
856 _class_loader = class_loader;
857 _h_protection_domain = h_protection_domain;
858 _data_ptr = data_ptr;
859 _end_ptr = end_ptr;
860 _thread = JavaThread::current();
861 _curr_len = *end_ptr - *data_ptr;
862 _curr_data = *data_ptr;
863 _curr_env = NULL;
864 _cached_class_file_ptr = cache_ptr;
865 _has_been_modified = false;
866
867 _state = _thread->jvmti_thread_state();
868 if (_state != NULL) {
869 _class_being_redefined = _state->get_class_being_redefined();
870 _load_kind = _state->get_class_load_kind();
871 Klass* klass = (_class_being_redefined == NULL) ? NULL : _class_being_redefined;
872 if (_load_kind != jvmti_class_load_kind_load && klass != NULL) {
873 ModuleEntry* module_entry = InstanceKlass::cast(klass)->module();
874 assert(module_entry != NULL, "module_entry should always be set");
875 if (module_entry->is_named() &&
876 module_entry->module() != NULL &&
877 !module_entry->has_default_read_edges()) {
878 if (!module_entry->set_has_default_read_edges()) {
879 // We won a potential race.
880 // Add read edges to the unnamed modules of the bootstrap and app class loaders
881 Handle class_module(_thread, module_entry->module()); // Obtain j.l.r.Module
882 JvmtiExport::add_default_read_edges(class_module, _thread);
883 }
884 }
885 }
886 // Clear class_being_redefined flag here. The action
887 // from agent handler could generate a new class file load
888 // hook event and if it is not cleared the new event generated
889 // from regular class file load could have this stale redefined
890 // class handle info.
891 _state->clear_class_being_redefined();
892 } else {
893 // redefine and retransform will always set the thread state
894 _class_being_redefined = NULL;
895 _load_kind = jvmti_class_load_kind_load;
896 }
897 }
898
899 void post() {
900 post_all_envs();
901 copy_modified_data();
902 }
903
904 bool has_been_modified() { return _has_been_modified; }
905
906 private:
907 void post_all_envs() {
908 if (_load_kind != jvmti_class_load_kind_retransform) {
909 // for class load and redefine,
910 // call the non-retransformable agents
911 JvmtiEnvIterator it;
912 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
913 if (!env->is_retransformable() && env->is_enabled(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK)) {
914 // non-retransformable agents cannot retransform back,
915 // so no need to cache the original class file bytes
916 post_to_env(env, false);
917 }
918 }
919 }
920 JvmtiEnvIterator it;
921 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
922 // retransformable agents get all events
923 if (env->is_retransformable() && env->is_enabled(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK)) {
924 // retransformable agents need to cache the original class file
925 // bytes if changes are made via the ClassFileLoadHook
926 post_to_env(env, true);
927 }
928 }
929 }
930
931 void post_to_env(JvmtiEnv* env, bool caching_needed) {
932 if (env->phase() == JVMTI_PHASE_PRIMORDIAL && !env->early_class_hook_env()) {
933 return;
934 }
935 unsigned char *new_data = NULL;
936 jint new_len = 0;
937 JvmtiClassFileLoadEventMark jem(_thread, _h_name, _class_loader,
938 _h_protection_domain,
939 _class_being_redefined);
940 JvmtiJavaThreadEventTransition jet(_thread);
941 jvmtiEventClassFileLoadHook callback = env->callbacks()->ClassFileLoadHook;
942 if (callback != NULL) {
943 (*callback)(env->jvmti_external(), jem.jni_env(),
944 jem.class_being_redefined(),
945 jem.jloader(), jem.class_name(),
946 jem.protection_domain(),
947 _curr_len, _curr_data,
948 &new_len, &new_data);
949 }
950 if (new_data != NULL) {
951 // this agent has modified class data.
952 _has_been_modified = true;
953 if (caching_needed && *_cached_class_file_ptr == NULL) {
954 // data has been changed by the new retransformable agent
955 // and it hasn't already been cached, cache it
956 JvmtiCachedClassFileData *p;
957 p = (JvmtiCachedClassFileData *)os::malloc(
958 offset_of(JvmtiCachedClassFileData, data) + _curr_len, mtInternal);
959 if (p == NULL) {
960 vm_exit_out_of_memory(offset_of(JvmtiCachedClassFileData, data) + _curr_len,
961 OOM_MALLOC_ERROR,
962 "unable to allocate cached copy of original class bytes");
963 }
964 p->length = _curr_len;
965 memcpy(p->data, _curr_data, _curr_len);
966 *_cached_class_file_ptr = p;
967 }
968
969 if (_curr_data != *_data_ptr) {
970 // curr_data is previous agent modified class data.
971 // And this has been changed by the new agent so
972 // we can delete it now.
973 _curr_env->Deallocate(_curr_data);
974 }
975
976 // Class file data has changed by the current agent.
977 _curr_data = new_data;
978 _curr_len = new_len;
979 // Save the current agent env we need this to deallocate the
980 // memory allocated by this agent.
981 _curr_env = env;
982 }
983 }
984
985 void copy_modified_data() {
986 // if one of the agent has modified class file data.
987 // Copy modified class data to new resources array.
988 if (_curr_data != *_data_ptr) {
989 *_data_ptr = NEW_RESOURCE_ARRAY(u1, _curr_len);
990 memcpy(*_data_ptr, _curr_data, _curr_len);
991 *_end_ptr = *_data_ptr + _curr_len;
992 _curr_env->Deallocate(_curr_data);
993 }
994 }
995 };
996
997 bool JvmtiExport::early_class_hook_env() {
998 JvmtiEnvIterator it;
999 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1000 if (env->early_class_hook_env()) {
1001 return true;
1002 }
1003 }
1004 return false;
1005 }
1006
1007 bool JvmtiExport::_should_post_class_file_load_hook = false;
1008
1009 // this entry is for class file load hook on class load, redefine and retransform
1010 bool JvmtiExport::post_class_file_load_hook(Symbol* h_name,
1011 Handle class_loader,
1012 Handle h_protection_domain,
1013 unsigned char **data_ptr,
1014 unsigned char **end_ptr,
1015 JvmtiCachedClassFileData **cache_ptr) {
1016 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) {
1017 return false;
1018 }
1019
1020 JvmtiClassFileLoadHookPoster poster(h_name, class_loader,
1021 h_protection_domain,
1022 data_ptr, end_ptr,
1023 cache_ptr);
1024 poster.post();
1025 return poster.has_been_modified();
1026 }
1027
1028 void JvmtiExport::report_unsupported(bool on) {
1029 // If any JVMTI service is turned on, we need to exit before native code
1030 // tries to access nonexistant services.
1031 if (on) {
1032 vm_exit_during_initialization("Java Kernel does not support JVMTI.");
1033 }
1034 }
1035
1036
1037 static inline Klass* oop_to_klass(oop obj) {
1038 Klass* k = obj->klass();
1039
1040 // if the object is a java.lang.Class then return the java mirror
1041 if (k == SystemDictionary::Class_klass()) {
1042 if (!java_lang_Class::is_primitive(obj)) {
1043 k = java_lang_Class::as_Klass(obj);
1044 assert(k != NULL, "class for non-primitive mirror must exist");
1045 }
1046 }
1047 return k;
1048 }
1049
1050 class JvmtiObjectAllocEventMark : public JvmtiClassEventMark {
1051 private:
1052 jobject _jobj;
1053 jlong _size;
1054 public:
1055 JvmtiObjectAllocEventMark(JavaThread *thread, oop obj) : JvmtiClassEventMark(thread, oop_to_klass(obj)) {
1056 _jobj = (jobject)to_jobject(obj);
1057 _size = Universe::heap()->obj_size(obj) * wordSize;
1058 };
1059 jobject jni_jobject() { return _jobj; }
1060 jlong size() { return _size; }
1061 };
1062
1063 class JvmtiCompiledMethodLoadEventMark : public JvmtiMethodEventMark {
1064 private:
1065 jint _code_size;
1066 const void *_code_data;
1067 jint _map_length;
1068 jvmtiAddrLocationMap *_map;
1069 const void *_compile_info;
1070 public:
1071 JvmtiCompiledMethodLoadEventMark(JavaThread *thread, nmethod *nm, void* compile_info_ptr = NULL)
1072 : JvmtiMethodEventMark(thread,methodHandle(thread, nm->method())) {
1073 _code_data = nm->insts_begin();
1074 _code_size = nm->insts_size();
1075 _compile_info = compile_info_ptr; // Set void pointer of compiledMethodLoad Event. Default value is NULL.
1076 JvmtiCodeBlobEvents::build_jvmti_addr_location_map(nm, &_map, &_map_length);
1077 }
1078 ~JvmtiCompiledMethodLoadEventMark() {
1079 FREE_C_HEAP_ARRAY(jvmtiAddrLocationMap, _map);
1080 }
1081
1082 jint code_size() { return _code_size; }
1083 const void *code_data() { return _code_data; }
1084 jint map_length() { return _map_length; }
1085 const jvmtiAddrLocationMap* map() { return _map; }
1086 const void *compile_info() { return _compile_info; }
1087 };
1088
1089
1090
1091 class JvmtiMonitorEventMark : public JvmtiThreadEventMark {
1092 private:
1093 jobject _jobj;
1094 public:
1095 JvmtiMonitorEventMark(JavaThread *thread, oop object)
1096 : JvmtiThreadEventMark(thread){
1097 _jobj = to_jobject(object);
1098 }
1099 jobject jni_object() { return _jobj; }
1100 };
1101
1102 ///////////////////////////////////////////////////////////////
1103 //
1104 // pending CompiledMethodUnload support
1105 //
1106
1107 void JvmtiExport::post_compiled_method_unload(
1108 jmethodID method, const void *code_begin) {
1109 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) {
1110 return;
1111 }
1112 JavaThread* thread = JavaThread::current();
1113 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_UNLOAD,
1114 ("[%s] method compile unload event triggered",
1115 JvmtiTrace::safe_get_thread_name(thread)));
1116
1117 // post the event for each environment that has this event enabled.
1118 JvmtiEnvIterator it;
1119 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1120 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_UNLOAD)) {
1121 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) {
1122 continue;
1123 }
1124 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_UNLOAD,
1125 ("[%s] class compile method unload event sent jmethodID " PTR_FORMAT,
1126 JvmtiTrace::safe_get_thread_name(thread), p2i(method)));
1127
1128 ResourceMark rm(thread);
1129
1130 JvmtiEventMark jem(thread);
1131 JvmtiJavaThreadEventTransition jet(thread);
1132 jvmtiEventCompiledMethodUnload callback = env->callbacks()->CompiledMethodUnload;
1133 if (callback != NULL) {
1134 (*callback)(env->jvmti_external(), method, code_begin);
1135 }
1136 }
1137 }
1138 }
1139
1140 ///////////////////////////////////////////////////////////////
1141 //
1142 // JvmtiExport
1143 //
1144
1145 void JvmtiExport::post_raw_breakpoint(JavaThread *thread, Method* method, address location) {
1146 HandleMark hm(thread);
1147 methodHandle mh(thread, method);
1148
1149 JvmtiThreadState *state = thread->jvmti_thread_state();
1150 if (state == NULL) {
1151 return;
1152 }
1153 EVT_TRIG_TRACE(JVMTI_EVENT_BREAKPOINT, ("[%s] Trg Breakpoint triggered",
1154 JvmtiTrace::safe_get_thread_name(thread)));
1155 JvmtiEnvThreadStateIterator it(state);
1156 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1157 ets->compare_and_set_current_location(mh(), location, JVMTI_EVENT_BREAKPOINT);
1158 if (!ets->breakpoint_posted() && ets->is_enabled(JVMTI_EVENT_BREAKPOINT)) {
1159 ThreadState old_os_state = thread->osthread()->get_state();
1160 thread->osthread()->set_state(BREAKPOINTED);
1161 EVT_TRACE(JVMTI_EVENT_BREAKPOINT, ("[%s] Evt Breakpoint sent %s.%s @ " INTX_FORMAT,
1162 JvmtiTrace::safe_get_thread_name(thread),
1163 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1164 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1165 location - mh()->code_base() ));
1166
1167 JvmtiEnv *env = ets->get_env();
1168 JvmtiLocationEventMark jem(thread, mh, location);
1169 JvmtiJavaThreadEventTransition jet(thread);
1170 jvmtiEventBreakpoint callback = env->callbacks()->Breakpoint;
1171 if (callback != NULL) {
1172 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1173 jem.jni_methodID(), jem.location());
1174 }
1175
1176 ets->set_breakpoint_posted();
1177 thread->osthread()->set_state(old_os_state);
1178 }
1179 }
1180 }
1181
1182 //////////////////////////////////////////////////////////////////////////////
1183
1184 bool JvmtiExport::_can_get_source_debug_extension = false;
1185 bool JvmtiExport::_can_maintain_original_method_order = false;
1186 bool JvmtiExport::_can_post_interpreter_events = false;
1187 bool JvmtiExport::_can_post_on_exceptions = false;
1188 bool JvmtiExport::_can_post_breakpoint = false;
1189 bool JvmtiExport::_can_post_field_access = false;
1190 bool JvmtiExport::_can_post_field_modification = false;
1191 bool JvmtiExport::_can_post_method_entry = false;
1192 bool JvmtiExport::_can_post_method_exit = false;
1193 bool JvmtiExport::_can_pop_frame = false;
1194 bool JvmtiExport::_can_force_early_return = false;
1195
1196 bool JvmtiExport::_early_vmstart_recorded = false;
1197
1198 bool JvmtiExport::_should_post_single_step = false;
1199 bool JvmtiExport::_should_post_field_access = false;
1200 bool JvmtiExport::_should_post_field_modification = false;
1201 bool JvmtiExport::_should_post_class_load = false;
1202 bool JvmtiExport::_should_post_class_prepare = false;
1203 bool JvmtiExport::_should_post_class_unload = false;
1204 bool JvmtiExport::_should_post_thread_life = false;
1205 bool JvmtiExport::_should_clean_up_heap_objects = false;
1206 bool JvmtiExport::_should_post_native_method_bind = false;
1207 bool JvmtiExport::_should_post_dynamic_code_generated = false;
1208 bool JvmtiExport::_should_post_data_dump = false;
1209 bool JvmtiExport::_should_post_compiled_method_load = false;
1210 bool JvmtiExport::_should_post_compiled_method_unload = false;
1211 bool JvmtiExport::_should_post_monitor_contended_enter = false;
1212 bool JvmtiExport::_should_post_monitor_contended_entered = false;
1213 bool JvmtiExport::_should_post_monitor_wait = false;
1214 bool JvmtiExport::_should_post_monitor_waited = false;
1215 bool JvmtiExport::_should_post_garbage_collection_start = false;
1216 bool JvmtiExport::_should_post_garbage_collection_finish = false;
1217 bool JvmtiExport::_should_post_object_free = false;
1218 bool JvmtiExport::_should_post_resource_exhausted = false;
1219 bool JvmtiExport::_should_post_vm_object_alloc = false;
1220 bool JvmtiExport::_should_post_sampled_object_alloc = false;
1221 bool JvmtiExport::_should_post_on_exceptions = false;
1222
1223 ////////////////////////////////////////////////////////////////////////////////////////////////
1224
1225
1226 //
1227 // JVMTI single step management
1228 //
1229 void JvmtiExport::at_single_stepping_point(JavaThread *thread, Method* method, address location) {
1230 assert(JvmtiExport::should_post_single_step(), "must be single stepping");
1231
1232 HandleMark hm(thread);
1233 methodHandle mh(thread, method);
1234
1235 // update information about current location and post a step event
1236 JvmtiThreadState *state = thread->jvmti_thread_state();
1237 if (state == NULL) {
1238 return;
1239 }
1240 EVT_TRIG_TRACE(JVMTI_EVENT_SINGLE_STEP, ("[%s] Trg Single Step triggered",
1241 JvmtiTrace::safe_get_thread_name(thread)));
1242 if (!state->hide_single_stepping()) {
1243 if (state->is_pending_step_for_popframe()) {
1244 state->process_pending_step_for_popframe();
1245 }
1246 if (state->is_pending_step_for_earlyret()) {
1247 state->process_pending_step_for_earlyret();
1248 }
1249 JvmtiExport::post_single_step(thread, mh(), location);
1250 }
1251 }
1252
1253
1254 void JvmtiExport::expose_single_stepping(JavaThread *thread) {
1255 JvmtiThreadState *state = thread->jvmti_thread_state();
1256 if (state != NULL) {
1257 state->clear_hide_single_stepping();
1258 }
1259 }
1260
1261
1262 bool JvmtiExport::hide_single_stepping(JavaThread *thread) {
1263 JvmtiThreadState *state = thread->jvmti_thread_state();
1264 if (state != NULL && state->is_enabled(JVMTI_EVENT_SINGLE_STEP)) {
1265 state->set_hide_single_stepping();
1266 return true;
1267 } else {
1268 return false;
1269 }
1270 }
1271
1272 void JvmtiExport::post_class_load(JavaThread *thread, Klass* klass) {
1273 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) {
1274 return;
1275 }
1276 HandleMark hm(thread);
1277
1278 EVT_TRIG_TRACE(JVMTI_EVENT_CLASS_LOAD, ("[%s] Trg Class Load triggered",
1279 JvmtiTrace::safe_get_thread_name(thread)));
1280 JvmtiThreadState* state = thread->jvmti_thread_state();
1281 if (state == NULL) {
1282 return;
1283 }
1284 JvmtiEnvThreadStateIterator it(state);
1285 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1286 if (ets->is_enabled(JVMTI_EVENT_CLASS_LOAD)) {
1287 JvmtiEnv *env = ets->get_env();
1288 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) {
1289 continue;
1290 }
1291 EVT_TRACE(JVMTI_EVENT_CLASS_LOAD, ("[%s] Evt Class Load sent %s",
1292 JvmtiTrace::safe_get_thread_name(thread),
1293 klass==NULL? "NULL" : klass->external_name() ));
1294 JvmtiClassEventMark jem(thread, klass);
1295 JvmtiJavaThreadEventTransition jet(thread);
1296 jvmtiEventClassLoad callback = env->callbacks()->ClassLoad;
1297 if (callback != NULL) {
1298 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_class());
1299 }
1300 }
1301 }
1302 }
1303
1304
1305 void JvmtiExport::post_class_prepare(JavaThread *thread, Klass* klass) {
1306 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) {
1307 return;
1308 }
1309 HandleMark hm(thread);
1310
1311 EVT_TRIG_TRACE(JVMTI_EVENT_CLASS_PREPARE, ("[%s] Trg Class Prepare triggered",
1312 JvmtiTrace::safe_get_thread_name(thread)));
1313 JvmtiThreadState* state = thread->jvmti_thread_state();
1314 if (state == NULL) {
1315 return;
1316 }
1317 JvmtiEnvThreadStateIterator it(state);
1318 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1319 if (ets->is_enabled(JVMTI_EVENT_CLASS_PREPARE)) {
1320 JvmtiEnv *env = ets->get_env();
1321 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) {
1322 continue;
1323 }
1324 EVT_TRACE(JVMTI_EVENT_CLASS_PREPARE, ("[%s] Evt Class Prepare sent %s",
1325 JvmtiTrace::safe_get_thread_name(thread),
1326 klass==NULL? "NULL" : klass->external_name() ));
1327 JvmtiClassEventMark jem(thread, klass);
1328 JvmtiJavaThreadEventTransition jet(thread);
1329 jvmtiEventClassPrepare callback = env->callbacks()->ClassPrepare;
1330 if (callback != NULL) {
1331 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_class());
1332 }
1333 }
1334 }
1335 }
1336
1337 void JvmtiExport::post_class_unload(Klass* klass) {
1338 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) {
1339 return;
1340 }
1341 Thread *thread = Thread::current();
1342 HandleMark hm(thread);
1343
1344 EVT_TRIG_TRACE(EXT_EVENT_CLASS_UNLOAD, ("[?] Trg Class Unload triggered" ));
1345 if (JvmtiEventController::is_enabled((jvmtiEvent)EXT_EVENT_CLASS_UNLOAD)) {
1346 assert(thread->is_VM_thread(), "wrong thread");
1347
1348 // get JavaThread for whom we are proxy
1349 Thread *calling_thread = ((VMThread *)thread)->vm_operation()->calling_thread();
1350 if (!calling_thread->is_Java_thread()) {
1351 // cannot post an event to a non-JavaThread
1352 return;
1353 }
1354 JavaThread *real_thread = (JavaThread *)calling_thread;
1355
1356 JvmtiEnvIterator it;
1357 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1358 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) {
1359 continue;
1360 }
1361 if (env->is_enabled((jvmtiEvent)EXT_EVENT_CLASS_UNLOAD)) {
1362 EVT_TRACE(EXT_EVENT_CLASS_UNLOAD, ("[?] Evt Class Unload sent %s",
1363 klass==NULL? "NULL" : klass->external_name() ));
1364
1365 // do everything manually, since this is a proxy - needs special care
1366 JNIEnv* jni_env = real_thread->jni_environment();
1367 jthread jt = (jthread)JNIHandles::make_local(real_thread, real_thread->threadObj());
1368 jclass jk = (jclass)JNIHandles::make_local(real_thread, klass->java_mirror());
1369
1370 // Before we call the JVMTI agent, we have to set the state in the
1371 // thread for which we are proxying.
1372 JavaThreadState prev_state = real_thread->thread_state();
1373 assert(((Thread *)real_thread)->is_ConcurrentGC_thread() ||
1374 (real_thread->is_Java_thread() && prev_state == _thread_blocked),
1375 "should be ConcurrentGCThread or JavaThread at safepoint");
1376 real_thread->set_thread_state(_thread_in_native);
1377
1378 jvmtiExtensionEvent callback = env->ext_callbacks()->ClassUnload;
1379 if (callback != NULL) {
1380 (*callback)(env->jvmti_external(), jni_env, jt, jk);
1381 }
1382
1383 assert(real_thread->thread_state() == _thread_in_native,
1384 "JavaThread should be in native");
1385 real_thread->set_thread_state(prev_state);
1386
1387 JNIHandles::destroy_local(jk);
1388 JNIHandles::destroy_local(jt);
1389 }
1390 }
1391 }
1392 }
1393
1394
1395 void JvmtiExport::post_thread_start(JavaThread *thread) {
1396 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) {
1397 return;
1398 }
1399 assert(thread->thread_state() == _thread_in_vm, "must be in vm state");
1400
1401 EVT_TRIG_TRACE(JVMTI_EVENT_THREAD_START, ("[%s] Trg Thread Start event triggered",
1402 JvmtiTrace::safe_get_thread_name(thread)));
1403
1404 // do JVMTI thread initialization (if needed)
1405 JvmtiEventController::thread_started(thread);
1406
1407 // Do not post thread start event for hidden java thread.
1408 if (JvmtiEventController::is_enabled(JVMTI_EVENT_THREAD_START) &&
1409 !thread->is_hidden_from_external_view()) {
1410 JvmtiEnvIterator it;
1411 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1412 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) {
1413 continue;
1414 }
1415 if (env->is_enabled(JVMTI_EVENT_THREAD_START)) {
1416 EVT_TRACE(JVMTI_EVENT_THREAD_START, ("[%s] Evt Thread Start event sent",
1417 JvmtiTrace::safe_get_thread_name(thread) ));
1418
1419 JvmtiThreadEventMark jem(thread);
1420 JvmtiJavaThreadEventTransition jet(thread);
1421 jvmtiEventThreadStart callback = env->callbacks()->ThreadStart;
1422 if (callback != NULL) {
1423 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread());
1424 }
1425 }
1426 }
1427 }
1428 }
1429
1430
1431 void JvmtiExport::post_thread_end(JavaThread *thread) {
1432 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) {
1433 return;
1434 }
1435 EVT_TRIG_TRACE(JVMTI_EVENT_THREAD_END, ("[%s] Trg Thread End event triggered",
1436 JvmtiTrace::safe_get_thread_name(thread)));
1437
1438 JvmtiThreadState *state = thread->jvmti_thread_state();
1439 if (state == NULL) {
1440 return;
1441 }
1442
1443 // Do not post thread end event for hidden java thread.
1444 if (state->is_enabled(JVMTI_EVENT_THREAD_END) &&
1445 !thread->is_hidden_from_external_view()) {
1446
1447 JvmtiEnvThreadStateIterator it(state);
1448 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1449 if (ets->is_enabled(JVMTI_EVENT_THREAD_END)) {
1450 JvmtiEnv *env = ets->get_env();
1451 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) {
1452 continue;
1453 }
1454 EVT_TRACE(JVMTI_EVENT_THREAD_END, ("[%s] Evt Thread End event sent",
1455 JvmtiTrace::safe_get_thread_name(thread) ));
1456
1457 JvmtiThreadEventMark jem(thread);
1458 JvmtiJavaThreadEventTransition jet(thread);
1459 jvmtiEventThreadEnd callback = env->callbacks()->ThreadEnd;
1460 if (callback != NULL) {
1461 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread());
1462 }
1463 }
1464 }
1465 }
1466 }
1467
1468 void JvmtiExport::post_object_free(JvmtiEnv* env, jlong tag) {
1469 assert(SafepointSynchronize::is_at_safepoint(), "must be executed at safepoint");
1470 assert(env->is_enabled(JVMTI_EVENT_OBJECT_FREE), "checking");
1471
1472 EVT_TRIG_TRACE(JVMTI_EVENT_OBJECT_FREE, ("[?] Trg Object Free triggered" ));
1473 EVT_TRACE(JVMTI_EVENT_OBJECT_FREE, ("[?] Evt Object Free sent"));
1474
1475 jvmtiEventObjectFree callback = env->callbacks()->ObjectFree;
1476 if (callback != NULL) {
1477 (*callback)(env->jvmti_external(), tag);
1478 }
1479 }
1480
1481 void JvmtiExport::post_resource_exhausted(jint resource_exhausted_flags, const char* description) {
1482 EVT_TRIG_TRACE(JVMTI_EVENT_RESOURCE_EXHAUSTED, ("Trg resource exhausted event triggered" ));
1483
1484 JvmtiEnvIterator it;
1485 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1486 if (env->is_enabled(JVMTI_EVENT_RESOURCE_EXHAUSTED)) {
1487 EVT_TRACE(JVMTI_EVENT_RESOURCE_EXHAUSTED, ("Evt resource exhausted event sent" ));
1488
1489 JavaThread *thread = JavaThread::current();
1490 JvmtiThreadEventMark jem(thread);
1491 JvmtiJavaThreadEventTransition jet(thread);
1492 jvmtiEventResourceExhausted callback = env->callbacks()->ResourceExhausted;
1493 if (callback != NULL) {
1494 (*callback)(env->jvmti_external(), jem.jni_env(),
1495 resource_exhausted_flags, NULL, description);
1496 }
1497 }
1498 }
1499 }
1500
1501 void JvmtiExport::post_method_entry(JavaThread *thread, Method* method, frame current_frame) {
1502 HandleMark hm(thread);
1503 methodHandle mh(thread, method);
1504
1505 EVT_TRIG_TRACE(JVMTI_EVENT_METHOD_ENTRY, ("[%s] Trg Method Entry triggered %s.%s",
1506 JvmtiTrace::safe_get_thread_name(thread),
1507 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1508 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1509
1510 JvmtiThreadState* state = thread->jvmti_thread_state();
1511 if (state == NULL || !state->is_interp_only_mode()) {
1512 // for any thread that actually wants method entry, interp_only_mode is set
1513 return;
1514 }
1515
1516 state->incr_cur_stack_depth();
1517
1518 if (state->is_enabled(JVMTI_EVENT_METHOD_ENTRY)) {
1519 JvmtiEnvThreadStateIterator it(state);
1520 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1521 if (ets->is_enabled(JVMTI_EVENT_METHOD_ENTRY)) {
1522 EVT_TRACE(JVMTI_EVENT_METHOD_ENTRY, ("[%s] Evt Method Entry sent %s.%s",
1523 JvmtiTrace::safe_get_thread_name(thread),
1524 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1525 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1526
1527 JvmtiEnv *env = ets->get_env();
1528 JvmtiMethodEventMark jem(thread, mh);
1529 JvmtiJavaThreadEventTransition jet(thread);
1530 jvmtiEventMethodEntry callback = env->callbacks()->MethodEntry;
1531 if (callback != NULL) {
1532 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_methodID());
1533 }
1534 }
1535 }
1536 }
1537 }
1538
1539 void JvmtiExport::post_method_exit(JavaThread *thread, Method* method, frame current_frame) {
1540 HandleMark hm(thread);
1541 methodHandle mh(thread, method);
1542
1543 EVT_TRIG_TRACE(JVMTI_EVENT_METHOD_EXIT, ("[%s] Trg Method Exit triggered %s.%s",
1544 JvmtiTrace::safe_get_thread_name(thread),
1545 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1546 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1547
1548 JvmtiThreadState *state = thread->jvmti_thread_state();
1549 if (state == NULL || !state->is_interp_only_mode()) {
1550 // for any thread that actually wants method exit, interp_only_mode is set
1551 return;
1552 }
1553
1554 // return a flag when a method terminates by throwing an exception
1555 // i.e. if an exception is thrown and it's not caught by the current method
1556 bool exception_exit = state->is_exception_detected() && !state->is_exception_caught();
1557
1558
1559 if (state->is_enabled(JVMTI_EVENT_METHOD_EXIT)) {
1560 Handle result;
1561 jvalue value;
1562 value.j = 0L;
1563
1564 // if the method hasn't been popped because of an exception then we populate
1565 // the return_value parameter for the callback. At this point we only have
1566 // the address of a "raw result" and we just call into the interpreter to
1567 // convert this into a jvalue.
1568 if (!exception_exit) {
1569 oop oop_result;
1570 BasicType type = current_frame.interpreter_frame_result(&oop_result, &value);
1571 if (type == T_OBJECT || type == T_ARRAY) {
1572 result = Handle(thread, oop_result);
1573 }
1574 }
1575
1576 JvmtiEnvThreadStateIterator it(state);
1577 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1578 if (ets->is_enabled(JVMTI_EVENT_METHOD_EXIT)) {
1579 EVT_TRACE(JVMTI_EVENT_METHOD_EXIT, ("[%s] Evt Method Exit sent %s.%s",
1580 JvmtiTrace::safe_get_thread_name(thread),
1581 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1582 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1583
1584 JvmtiEnv *env = ets->get_env();
1585 JvmtiMethodEventMark jem(thread, mh);
1586 if (result.not_null()) {
1587 value.l = JNIHandles::make_local(thread, result());
1588 }
1589 JvmtiJavaThreadEventTransition jet(thread);
1590 jvmtiEventMethodExit callback = env->callbacks()->MethodExit;
1591 if (callback != NULL) {
1592 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1593 jem.jni_methodID(), exception_exit, value);
1594 }
1595 }
1596 }
1597 }
1598
1599 JvmtiEnvThreadStateIterator it(state);
1600 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1601 if (ets->has_frame_pops()) {
1602 int cur_frame_number = state->cur_stack_depth();
1603
1604 if (ets->is_frame_pop(cur_frame_number)) {
1605 // we have a NotifyFramePop entry for this frame.
1606 // now check that this env/thread wants this event
1607 if (ets->is_enabled(JVMTI_EVENT_FRAME_POP)) {
1608 EVT_TRACE(JVMTI_EVENT_FRAME_POP, ("[%s] Evt Frame Pop sent %s.%s",
1609 JvmtiTrace::safe_get_thread_name(thread),
1610 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1611 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1612
1613 // we also need to issue a frame pop event for this frame
1614 JvmtiEnv *env = ets->get_env();
1615 JvmtiMethodEventMark jem(thread, mh);
1616 JvmtiJavaThreadEventTransition jet(thread);
1617 jvmtiEventFramePop callback = env->callbacks()->FramePop;
1618 if (callback != NULL) {
1619 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1620 jem.jni_methodID(), exception_exit);
1621 }
1622 }
1623 // remove the frame's entry
1624 ets->clear_frame_pop(cur_frame_number);
1625 }
1626 }
1627 }
1628
1629 state->decr_cur_stack_depth();
1630 }
1631
1632
1633 // Todo: inline this for optimization
1634 void JvmtiExport::post_single_step(JavaThread *thread, Method* method, address location) {
1635 HandleMark hm(thread);
1636 methodHandle mh(thread, method);
1637
1638 JvmtiThreadState *state = thread->jvmti_thread_state();
1639 if (state == NULL) {
1640 return;
1641 }
1642 JvmtiEnvThreadStateIterator it(state);
1643 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1644 ets->compare_and_set_current_location(mh(), location, JVMTI_EVENT_SINGLE_STEP);
1645 if (!ets->single_stepping_posted() && ets->is_enabled(JVMTI_EVENT_SINGLE_STEP)) {
1646 EVT_TRACE(JVMTI_EVENT_SINGLE_STEP, ("[%s] Evt Single Step sent %s.%s @ " INTX_FORMAT,
1647 JvmtiTrace::safe_get_thread_name(thread),
1648 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1649 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1650 location - mh()->code_base() ));
1651
1652 JvmtiEnv *env = ets->get_env();
1653 JvmtiLocationEventMark jem(thread, mh, location);
1654 JvmtiJavaThreadEventTransition jet(thread);
1655 jvmtiEventSingleStep callback = env->callbacks()->SingleStep;
1656 if (callback != NULL) {
1657 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1658 jem.jni_methodID(), jem.location());
1659 }
1660
1661 ets->set_single_stepping_posted();
1662 }
1663 }
1664 }
1665
1666 void JvmtiExport::post_exception_throw(JavaThread *thread, Method* method, address location, oop exception) {
1667 HandleMark hm(thread);
1668 methodHandle mh(thread, method);
1669 Handle exception_handle(thread, exception);
1670
1671 JvmtiThreadState *state = thread->jvmti_thread_state();
1672 if (state == NULL) {
1673 return;
1674 }
1675
1676 EVT_TRIG_TRACE(JVMTI_EVENT_EXCEPTION, ("[%s] Trg Exception thrown triggered",
1677 JvmtiTrace::safe_get_thread_name(thread)));
1678 if (!state->is_exception_detected()) {
1679 state->set_exception_detected();
1680 JvmtiEnvThreadStateIterator it(state);
1681 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1682 if (ets->is_enabled(JVMTI_EVENT_EXCEPTION) && (exception != NULL)) {
1683
1684 EVT_TRACE(JVMTI_EVENT_EXCEPTION,
1685 ("[%s] Evt Exception thrown sent %s.%s @ " INTX_FORMAT,
1686 JvmtiTrace::safe_get_thread_name(thread),
1687 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1688 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1689 location - mh()->code_base() ));
1690
1691 JvmtiEnv *env = ets->get_env();
1692 JvmtiExceptionEventMark jem(thread, mh, location, exception_handle);
1693
1694 // It's okay to clear these exceptions here because we duplicate
1695 // this lookup in InterpreterRuntime::exception_handler_for_exception.
1696 EXCEPTION_MARK;
1697
1698 bool should_repeat;
1699 vframeStream st(thread);
1700 assert(!st.at_end(), "cannot be at end");
1701 Method* current_method = NULL;
1702 // A GC may occur during the Method::fast_exception_handler_bci_for()
1703 // call below if it needs to load the constraint class. Using a
1704 // methodHandle to keep the 'current_method' from being deallocated
1705 // if GC happens.
1706 methodHandle current_mh = methodHandle(thread, current_method);
1707 int current_bci = -1;
1708 do {
1709 current_method = st.method();
1710 current_mh = methodHandle(thread, current_method);
1711 current_bci = st.bci();
1712 do {
1713 should_repeat = false;
1714 Klass* eh_klass = exception_handle()->klass();
1715 current_bci = Method::fast_exception_handler_bci_for(
1716 current_mh, eh_klass, current_bci, THREAD);
1717 if (HAS_PENDING_EXCEPTION) {
1718 exception_handle = Handle(thread, PENDING_EXCEPTION);
1719 CLEAR_PENDING_EXCEPTION;
1720 should_repeat = true;
1721 }
1722 } while (should_repeat && (current_bci != -1));
1723 st.next();
1724 } while ((current_bci < 0) && (!st.at_end()));
1725
1726 jmethodID catch_jmethodID;
1727 if (current_bci < 0) {
1728 catch_jmethodID = 0;
1729 current_bci = 0;
1730 } else {
1731 catch_jmethodID = jem.to_jmethodID(current_mh);
1732 }
1733
1734 JvmtiJavaThreadEventTransition jet(thread);
1735 jvmtiEventException callback = env->callbacks()->Exception;
1736 if (callback != NULL) {
1737 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1738 jem.jni_methodID(), jem.location(),
1739 jem.exception(),
1740 catch_jmethodID, current_bci);
1741 }
1742 }
1743 }
1744 }
1745
1746 // frames may get popped because of this throw, be safe - invalidate cached depth
1747 state->invalidate_cur_stack_depth();
1748 }
1749
1750
1751 void JvmtiExport::notice_unwind_due_to_exception(JavaThread *thread, Method* method, address location, oop exception, bool in_handler_frame) {
1752 HandleMark hm(thread);
1753 methodHandle mh(thread, method);
1754 Handle exception_handle(thread, exception);
1755
1756 JvmtiThreadState *state = thread->jvmti_thread_state();
1757 if (state == NULL) {
1758 return;
1759 }
1760 EVT_TRIG_TRACE(JVMTI_EVENT_EXCEPTION_CATCH,
1761 ("[%s] Trg unwind_due_to_exception triggered %s.%s @ %s" INTX_FORMAT " - %s",
1762 JvmtiTrace::safe_get_thread_name(thread),
1763 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1764 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1765 location==0? "no location:" : "",
1766 location==0? 0 : location - mh()->code_base(),
1767 in_handler_frame? "in handler frame" : "not handler frame" ));
1768
1769 if (state->is_exception_detected()) {
1770
1771 state->invalidate_cur_stack_depth();
1772 if (!in_handler_frame) {
1773 // Not in exception handler.
1774 if(state->is_interp_only_mode()) {
1775 // method exit and frame pop events are posted only in interp mode.
1776 // When these events are enabled code should be in running in interp mode.
1777 JvmtiExport::post_method_exit(thread, method, thread->last_frame());
1778 // The cached cur_stack_depth might have changed from the
1779 // operations of frame pop or method exit. We are not 100% sure
1780 // the cached cur_stack_depth is still valid depth so invalidate
1781 // it.
1782 state->invalidate_cur_stack_depth();
1783 }
1784 } else {
1785 // In exception handler frame. Report exception catch.
1786 assert(location != NULL, "must be a known location");
1787 // Update cur_stack_depth - the frames above the current frame
1788 // have been unwound due to this exception:
1789 assert(!state->is_exception_caught(), "exception must not be caught yet.");
1790 state->set_exception_caught();
1791
1792 JvmtiEnvThreadStateIterator it(state);
1793 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1794 if (ets->is_enabled(JVMTI_EVENT_EXCEPTION_CATCH) && (exception_handle() != NULL)) {
1795 EVT_TRACE(JVMTI_EVENT_EXCEPTION_CATCH,
1796 ("[%s] Evt ExceptionCatch sent %s.%s @ " INTX_FORMAT,
1797 JvmtiTrace::safe_get_thread_name(thread),
1798 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1799 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1800 location - mh()->code_base() ));
1801
1802 JvmtiEnv *env = ets->get_env();
1803 JvmtiExceptionEventMark jem(thread, mh, location, exception_handle);
1804 JvmtiJavaThreadEventTransition jet(thread);
1805 jvmtiEventExceptionCatch callback = env->callbacks()->ExceptionCatch;
1806 if (callback != NULL) {
1807 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1808 jem.jni_methodID(), jem.location(),
1809 jem.exception());
1810 }
1811 }
1812 }
1813 }
1814 }
1815 }
1816
1817 oop JvmtiExport::jni_GetField_probe(JavaThread *thread, jobject jobj, oop obj,
1818 Klass* klass, jfieldID fieldID, bool is_static) {
1819 if (*((int *)get_field_access_count_addr()) > 0 && thread->has_last_Java_frame()) {
1820 // At least one field access watch is set so we have more work
1821 // to do. This wrapper is used by entry points that allow us
1822 // to create handles in post_field_access_by_jni().
1823 post_field_access_by_jni(thread, obj, klass, fieldID, is_static);
1824 // event posting can block so refetch oop if we were passed a jobj
1825 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj);
1826 }
1827 return obj;
1828 }
1829
1830 oop JvmtiExport::jni_GetField_probe_nh(JavaThread *thread, jobject jobj, oop obj,
1831 Klass* klass, jfieldID fieldID, bool is_static) {
1832 if (*((int *)get_field_access_count_addr()) > 0 && thread->has_last_Java_frame()) {
1833 // At least one field access watch is set so we have more work
1834 // to do. This wrapper is used by "quick" entry points that don't
1835 // allow us to create handles in post_field_access_by_jni(). We
1836 // override that with a ResetNoHandleMark.
1837 ResetNoHandleMark rnhm;
1838 post_field_access_by_jni(thread, obj, klass, fieldID, is_static);
1839 // event posting can block so refetch oop if we were passed a jobj
1840 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj);
1841 }
1842 return obj;
1843 }
1844
1845 void JvmtiExport::post_field_access_by_jni(JavaThread *thread, oop obj,
1846 Klass* klass, jfieldID fieldID, bool is_static) {
1847 // We must be called with a Java context in order to provide reasonable
1848 // values for the klazz, method, and location fields. The callers of this
1849 // function don't make the call unless there is a Java context.
1850 assert(thread->has_last_Java_frame(), "must be called with a Java context");
1851
1852 ResourceMark rm;
1853 fieldDescriptor fd;
1854 // if get_field_descriptor finds fieldID to be invalid, then we just bail
1855 bool valid_fieldID = JvmtiEnv::get_field_descriptor(klass, fieldID, &fd);
1856 assert(valid_fieldID == true,"post_field_access_by_jni called with invalid fieldID");
1857 if (!valid_fieldID) return;
1858 // field accesses are not watched so bail
1859 if (!fd.is_field_access_watched()) return;
1860
1861 HandleMark hm(thread);
1862 Handle h_obj;
1863 if (!is_static) {
1864 // non-static field accessors have an object, but we need a handle
1865 assert(obj != NULL, "non-static needs an object");
1866 h_obj = Handle(thread, obj);
1867 }
1868 post_field_access(thread,
1869 thread->last_frame().interpreter_frame_method(),
1870 thread->last_frame().interpreter_frame_bcp(),
1871 klass, h_obj, fieldID);
1872 }
1873
1874 void JvmtiExport::post_field_access(JavaThread *thread, Method* method,
1875 address location, Klass* field_klass, Handle object, jfieldID field) {
1876
1877 HandleMark hm(thread);
1878 methodHandle mh(thread, method);
1879
1880 JvmtiThreadState *state = thread->jvmti_thread_state();
1881 if (state == NULL) {
1882 return;
1883 }
1884 EVT_TRIG_TRACE(JVMTI_EVENT_FIELD_ACCESS, ("[%s] Trg Field Access event triggered",
1885 JvmtiTrace::safe_get_thread_name(thread)));
1886 JvmtiEnvThreadStateIterator it(state);
1887 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1888 if (ets->is_enabled(JVMTI_EVENT_FIELD_ACCESS)) {
1889 EVT_TRACE(JVMTI_EVENT_FIELD_ACCESS, ("[%s] Evt Field Access event sent %s.%s @ " INTX_FORMAT,
1890 JvmtiTrace::safe_get_thread_name(thread),
1891 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1892 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1893 location - mh()->code_base() ));
1894
1895 JvmtiEnv *env = ets->get_env();
1896 JvmtiLocationEventMark jem(thread, mh, location);
1897 jclass field_jclass = jem.to_jclass(field_klass);
1898 jobject field_jobject = jem.to_jobject(object());
1899 JvmtiJavaThreadEventTransition jet(thread);
1900 jvmtiEventFieldAccess callback = env->callbacks()->FieldAccess;
1901 if (callback != NULL) {
1902 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1903 jem.jni_methodID(), jem.location(),
1904 field_jclass, field_jobject, field);
1905 }
1906 }
1907 }
1908 }
1909
1910 oop JvmtiExport::jni_SetField_probe(JavaThread *thread, jobject jobj, oop obj,
1911 Klass* klass, jfieldID fieldID, bool is_static,
1912 char sig_type, jvalue *value) {
1913 if (*((int *)get_field_modification_count_addr()) > 0 && thread->has_last_Java_frame()) {
1914 // At least one field modification watch is set so we have more work
1915 // to do. This wrapper is used by entry points that allow us
1916 // to create handles in post_field_modification_by_jni().
1917 post_field_modification_by_jni(thread, obj, klass, fieldID, is_static, sig_type, value);
1918 // event posting can block so refetch oop if we were passed a jobj
1919 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj);
1920 }
1921 return obj;
1922 }
1923
1924 oop JvmtiExport::jni_SetField_probe_nh(JavaThread *thread, jobject jobj, oop obj,
1925 Klass* klass, jfieldID fieldID, bool is_static,
1926 char sig_type, jvalue *value) {
1927 if (*((int *)get_field_modification_count_addr()) > 0 && thread->has_last_Java_frame()) {
1928 // At least one field modification watch is set so we have more work
1929 // to do. This wrapper is used by "quick" entry points that don't
1930 // allow us to create handles in post_field_modification_by_jni(). We
1931 // override that with a ResetNoHandleMark.
1932 ResetNoHandleMark rnhm;
1933 post_field_modification_by_jni(thread, obj, klass, fieldID, is_static, sig_type, value);
1934 // event posting can block so refetch oop if we were passed a jobj
1935 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj);
1936 }
1937 return obj;
1938 }
1939
1940 void JvmtiExport::post_field_modification_by_jni(JavaThread *thread, oop obj,
1941 Klass* klass, jfieldID fieldID, bool is_static,
1942 char sig_type, jvalue *value) {
1943 // We must be called with a Java context in order to provide reasonable
1944 // values for the klazz, method, and location fields. The callers of this
1945 // function don't make the call unless there is a Java context.
1946 assert(thread->has_last_Java_frame(), "must be called with Java context");
1947
1948 ResourceMark rm;
1949 fieldDescriptor fd;
1950 // if get_field_descriptor finds fieldID to be invalid, then we just bail
1951 bool valid_fieldID = JvmtiEnv::get_field_descriptor(klass, fieldID, &fd);
1952 assert(valid_fieldID == true,"post_field_modification_by_jni called with invalid fieldID");
1953 if (!valid_fieldID) return;
1954 // field modifications are not watched so bail
1955 if (!fd.is_field_modification_watched()) return;
1956
1957 HandleMark hm(thread);
1958
1959 Handle h_obj;
1960 if (!is_static) {
1961 // non-static field accessors have an object, but we need a handle
1962 assert(obj != NULL, "non-static needs an object");
1963 h_obj = Handle(thread, obj);
1964 }
1965 post_field_modification(thread,
1966 thread->last_frame().interpreter_frame_method(),
1967 thread->last_frame().interpreter_frame_bcp(),
1968 klass, h_obj, fieldID, sig_type, value);
1969 }
1970
1971 void JvmtiExport::post_raw_field_modification(JavaThread *thread, Method* method,
1972 address location, Klass* field_klass, Handle object, jfieldID field,
1973 char sig_type, jvalue *value) {
1974
1975 if (sig_type == 'I' || sig_type == 'Z' || sig_type == 'B' || sig_type == 'C' || sig_type == 'S') {
1976 // 'I' instructions are used for byte, char, short and int.
1977 // determine which it really is, and convert
1978 fieldDescriptor fd;
1979 bool found = JvmtiEnv::get_field_descriptor(field_klass, field, &fd);
1980 // should be found (if not, leave as is)
1981 if (found) {
1982 jint ival = value->i;
1983 // convert value from int to appropriate type
1984 switch (fd.field_type()) {
1985 case T_BOOLEAN:
1986 sig_type = 'Z';
1987 value->i = 0; // clear it
1988 value->z = (jboolean)ival;
1989 break;
1990 case T_BYTE:
1991 sig_type = 'B';
1992 value->i = 0; // clear it
1993 value->b = (jbyte)ival;
1994 break;
1995 case T_CHAR:
1996 sig_type = 'C';
1997 value->i = 0; // clear it
1998 value->c = (jchar)ival;
1999 break;
2000 case T_SHORT:
2001 sig_type = 'S';
2002 value->i = 0; // clear it
2003 value->s = (jshort)ival;
2004 break;
2005 case T_INT:
2006 // nothing to do
2007 break;
2008 default:
2009 // this is an integer instruction, should be one of above
2010 ShouldNotReachHere();
2011 break;
2012 }
2013 }
2014 }
2015
2016 assert(sig_type != '[', "array should have sig_type == 'L'");
2017 bool handle_created = false;
2018
2019 // convert oop to JNI handle.
2020 if (sig_type == 'L') {
2021 handle_created = true;
2022 value->l = (jobject)JNIHandles::make_local(thread, (oop)value->l);
2023 }
2024
2025 post_field_modification(thread, method, location, field_klass, object, field, sig_type, value);
2026
2027 // Destroy the JNI handle allocated above.
2028 if (handle_created) {
2029 JNIHandles::destroy_local(value->l);
2030 }
2031 }
2032
2033 void JvmtiExport::post_field_modification(JavaThread *thread, Method* method,
2034 address location, Klass* field_klass, Handle object, jfieldID field,
2035 char sig_type, jvalue *value_ptr) {
2036
2037 HandleMark hm(thread);
2038 methodHandle mh(thread, method);
2039
2040 JvmtiThreadState *state = thread->jvmti_thread_state();
2041 if (state == NULL) {
2042 return;
2043 }
2044 EVT_TRIG_TRACE(JVMTI_EVENT_FIELD_MODIFICATION,
2045 ("[%s] Trg Field Modification event triggered",
2046 JvmtiTrace::safe_get_thread_name(thread)));
2047
2048 JvmtiEnvThreadStateIterator it(state);
2049 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
2050 if (ets->is_enabled(JVMTI_EVENT_FIELD_MODIFICATION)) {
2051 EVT_TRACE(JVMTI_EVENT_FIELD_MODIFICATION,
2052 ("[%s] Evt Field Modification event sent %s.%s @ " INTX_FORMAT,
2053 JvmtiTrace::safe_get_thread_name(thread),
2054 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
2055 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
2056 location - mh()->code_base() ));
2057
2058 JvmtiEnv *env = ets->get_env();
2059 JvmtiLocationEventMark jem(thread, mh, location);
2060 jclass field_jclass = jem.to_jclass(field_klass);
2061 jobject field_jobject = jem.to_jobject(object());
2062 JvmtiJavaThreadEventTransition jet(thread);
2063 jvmtiEventFieldModification callback = env->callbacks()->FieldModification;
2064 if (callback != NULL) {
2065 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
2066 jem.jni_methodID(), jem.location(),
2067 field_jclass, field_jobject, field, sig_type, *value_ptr);
2068 }
2069 }
2070 }
2071 }
2072
2073 void JvmtiExport::post_native_method_bind(Method* method, address* function_ptr) {
2074 JavaThread* thread = JavaThread::current();
2075 assert(thread->thread_state() == _thread_in_vm, "must be in vm state");
2076
2077 HandleMark hm(thread);
2078 methodHandle mh(thread, method);
2079
2080 EVT_TRIG_TRACE(JVMTI_EVENT_NATIVE_METHOD_BIND, ("[%s] Trg Native Method Bind event triggered",
2081 JvmtiTrace::safe_get_thread_name(thread)));
2082
2083 if (JvmtiEventController::is_enabled(JVMTI_EVENT_NATIVE_METHOD_BIND)) {
2084 JvmtiEnvIterator it;
2085 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
2086 if (env->is_enabled(JVMTI_EVENT_NATIVE_METHOD_BIND)) {
2087 EVT_TRACE(JVMTI_EVENT_NATIVE_METHOD_BIND, ("[%s] Evt Native Method Bind event sent",
2088 JvmtiTrace::safe_get_thread_name(thread) ));
2089
2090 JvmtiMethodEventMark jem(thread, mh);
2091 JvmtiJavaThreadEventTransition jet(thread);
2092 JNIEnv* jni_env = (env->phase() == JVMTI_PHASE_PRIMORDIAL) ? NULL : jem.jni_env();
2093 jvmtiEventNativeMethodBind callback = env->callbacks()->NativeMethodBind;
2094 if (callback != NULL) {
2095 (*callback)(env->jvmti_external(), jni_env, jem.jni_thread(),
2096 jem.jni_methodID(), (void*)(*function_ptr), (void**)function_ptr);
2097 }
2098 }
2099 }
2100 }
2101 }
2102
2103 // Returns a record containing inlining information for the given nmethod
2104 jvmtiCompiledMethodLoadInlineRecord* create_inline_record(nmethod* nm) {
2105 jint numstackframes = 0;
2106 jvmtiCompiledMethodLoadInlineRecord* record = (jvmtiCompiledMethodLoadInlineRecord*)NEW_RESOURCE_OBJ(jvmtiCompiledMethodLoadInlineRecord);
2107 record->header.kind = JVMTI_CMLR_INLINE_INFO;
2108 record->header.next = NULL;
2109 record->header.majorinfoversion = JVMTI_CMLR_MAJOR_VERSION_1;
2110 record->header.minorinfoversion = JVMTI_CMLR_MINOR_VERSION_0;
2111 record->numpcs = 0;
2112 for(PcDesc* p = nm->scopes_pcs_begin(); p < nm->scopes_pcs_end(); p++) {
2113 if(p->scope_decode_offset() == DebugInformationRecorder::serialized_null) continue;
2114 record->numpcs++;
2115 }
2116 record->pcinfo = (PCStackInfo*)(NEW_RESOURCE_ARRAY(PCStackInfo, record->numpcs));
2117 int scope = 0;
2118 for(PcDesc* p = nm->scopes_pcs_begin(); p < nm->scopes_pcs_end(); p++) {
2119 if(p->scope_decode_offset() == DebugInformationRecorder::serialized_null) continue;
2120 void* pc_address = (void*)p->real_pc(nm);
2121 assert(pc_address != NULL, "pc_address must be non-null");
2122 record->pcinfo[scope].pc = pc_address;
2123 numstackframes=0;
2124 for(ScopeDesc* sd = nm->scope_desc_at(p->real_pc(nm));sd != NULL;sd = sd->sender()) {
2125 numstackframes++;
2126 }
2127 assert(numstackframes != 0, "numstackframes must be nonzero.");
2128 record->pcinfo[scope].methods = (jmethodID *)NEW_RESOURCE_ARRAY(jmethodID, numstackframes);
2129 record->pcinfo[scope].bcis = (jint *)NEW_RESOURCE_ARRAY(jint, numstackframes);
2130 record->pcinfo[scope].numstackframes = numstackframes;
2131 int stackframe = 0;
2132 for(ScopeDesc* sd = nm->scope_desc_at(p->real_pc(nm));sd != NULL;sd = sd->sender()) {
2133 // 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()
2134 assert(sd->method() != NULL, "sd->method() cannot be null.");
2135 record->pcinfo[scope].methods[stackframe] = sd->method()->jmethod_id();
2136 record->pcinfo[scope].bcis[stackframe] = sd->bci();
2137 stackframe++;
2138 }
2139 scope++;
2140 }
2141 return record;
2142 }
2143
2144 void JvmtiExport::post_compiled_method_load(nmethod *nm) {
2145 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) {
2146 return;
2147 }
2148 JavaThread* thread = JavaThread::current();
2149
2150 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
2151 ("[%s] method compile load event triggered",
2152 JvmtiTrace::safe_get_thread_name(thread)));
2153
2154 JvmtiEnvIterator it;
2155 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
2156 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_LOAD)) {
2157 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) {
2158 continue;
2159 }
2160 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
2161 ("[%s] class compile method load event sent %s.%s ",
2162 JvmtiTrace::safe_get_thread_name(thread),
2163 (nm->method() == NULL) ? "NULL" : nm->method()->klass_name()->as_C_string(),
2164 (nm->method() == NULL) ? "NULL" : nm->method()->name()->as_C_string()));
2165 ResourceMark rm(thread);
2166 HandleMark hm(thread);
2167
2168 // Add inlining information
2169 jvmtiCompiledMethodLoadInlineRecord* inlinerecord = create_inline_record(nm);
2170 // Pass inlining information through the void pointer
2171 JvmtiCompiledMethodLoadEventMark jem(thread, nm, inlinerecord);
2172 JvmtiJavaThreadEventTransition jet(thread);
2173 jvmtiEventCompiledMethodLoad callback = env->callbacks()->CompiledMethodLoad;
2174 if (callback != NULL) {
2175 (*callback)(env->jvmti_external(), jem.jni_methodID(),
2176 jem.code_size(), jem.code_data(), jem.map_length(),
2177 jem.map(), jem.compile_info());
2178 }
2179 }
2180 }
2181 }
2182
2183
2184 // post a COMPILED_METHOD_LOAD event for a given environment
2185 void JvmtiExport::post_compiled_method_load(JvmtiEnv* env, const jmethodID method, const jint length,
2186 const void *code_begin, const jint map_length,
2187 const jvmtiAddrLocationMap* map)
2188 {
2189 if (env->phase() <= JVMTI_PHASE_PRIMORDIAL) {
2190 return;
2191 }
2192 JavaThread* thread = JavaThread::current();
2193 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
2194 ("[%s] method compile load event triggered (by GenerateEvents)",
2195 JvmtiTrace::safe_get_thread_name(thread)));
2196 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_LOAD)) {
2197
2198 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
2199 ("[%s] class compile method load event sent (by GenerateEvents), jmethodID=" PTR_FORMAT,
2200 JvmtiTrace::safe_get_thread_name(thread), p2i(method)));
2201
2202 JvmtiEventMark jem(thread);
2203 JvmtiJavaThreadEventTransition jet(thread);
2204 jvmtiEventCompiledMethodLoad callback = env->callbacks()->CompiledMethodLoad;
2205 if (callback != NULL) {
2206 (*callback)(env->jvmti_external(), method,
2207 length, code_begin, map_length,
2208 map, NULL);
2209 }
2210 }
2211 }
2212
2213 void JvmtiExport::post_dynamic_code_generated_internal(const char *name, const void *code_begin, const void *code_end) {
2214 assert(name != NULL && name[0] != '\0', "sanity check");
2215
2216 JavaThread* thread = JavaThread::current();
2217 // In theory everyone coming thru here is in_vm but we need to be certain
2218 // because a callee will do a vm->native transition
2219 ThreadInVMfromUnknown __tiv;
2220
2221 EVT_TRIG_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED,
2222 ("[%s] method dynamic code generated event triggered",
2223 JvmtiTrace::safe_get_thread_name(thread)));
2224 JvmtiEnvIterator it;
2225 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
2226 if (env->is_enabled(JVMTI_EVENT_DYNAMIC_CODE_GENERATED)) {
2227 EVT_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED,
2228 ("[%s] dynamic code generated event sent for %s",
2229 JvmtiTrace::safe_get_thread_name(thread), name));
2230 JvmtiEventMark jem(thread);
2231 JvmtiJavaThreadEventTransition jet(thread);
2232 jint length = (jint)pointer_delta(code_end, code_begin, sizeof(char));
2233 jvmtiEventDynamicCodeGenerated callback = env->callbacks()->DynamicCodeGenerated;
2234 if (callback != NULL) {
2235 (*callback)(env->jvmti_external(), name, (void*)code_begin, length);
2236 }
2237 }
2238 }
2239 }
2240
2241 void JvmtiExport::post_dynamic_code_generated(const char *name, const void *code_begin, const void *code_end) {
2242 jvmtiPhase phase = JvmtiEnv::get_phase();
2243 if (phase == JVMTI_PHASE_PRIMORDIAL || phase == JVMTI_PHASE_START) {
2244 post_dynamic_code_generated_internal(name, code_begin, code_end);
2245 } else {
2246 // It may not be safe to post the event from this thread. Defer all
2247 // postings to the service thread so that it can perform them in a safe
2248 // context and in-order.
2249 MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag);
2250 JvmtiDeferredEvent event = JvmtiDeferredEvent::dynamic_code_generated_event(
2251 name, code_begin, code_end);
2252 JvmtiDeferredEventQueue::enqueue(event);
2253 }
2254 }
2255
2256
2257 // post a DYNAMIC_CODE_GENERATED event for a given environment
2258 // used by GenerateEvents
2259 void JvmtiExport::post_dynamic_code_generated(JvmtiEnv* env, const char *name,
2260 const void *code_begin, const void *code_end)
2261 {
2262 JavaThread* thread = JavaThread::current();
2263 EVT_TRIG_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED,
2264 ("[%s] dynamic code generated event triggered (by GenerateEvents)",
2265 JvmtiTrace::safe_get_thread_name(thread)));
2266 if (env->is_enabled(JVMTI_EVENT_DYNAMIC_CODE_GENERATED)) {
2267 EVT_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED,
2268 ("[%s] dynamic code generated event sent for %s",
2269 JvmtiTrace::safe_get_thread_name(thread), name));
2270 JvmtiEventMark jem(thread);
2271 JvmtiJavaThreadEventTransition jet(thread);
2272 jint length = (jint)pointer_delta(code_end, code_begin, sizeof(char));
2273 jvmtiEventDynamicCodeGenerated callback = env->callbacks()->DynamicCodeGenerated;
2274 if (callback != NULL) {
2275 (*callback)(env->jvmti_external(), name, (void*)code_begin, length);
2276 }
2277 }
2278 }
2279
2280 // post a DynamicCodeGenerated event while holding locks in the VM.
2281 void JvmtiExport::post_dynamic_code_generated_while_holding_locks(const char* name,
2282 address code_begin, address code_end)
2283 {
2284 // register the stub with the current dynamic code event collector
2285 JvmtiThreadState* state = JvmtiThreadState::state_for(JavaThread::current());
2286 // state can only be NULL if the current thread is exiting which
2287 // should not happen since we're trying to post an event
2288 guarantee(state != NULL, "attempt to register stub via an exiting thread");
2289 JvmtiDynamicCodeEventCollector* collector = state->get_dynamic_code_event_collector();
2290 guarantee(collector != NULL, "attempt to register stub without event collector");
2291 collector->register_stub(name, code_begin, code_end);
2292 }
2293
2294 // Collect all the vm internally allocated objects which are visible to java world
2295 void JvmtiExport::record_vm_internal_object_allocation(oop obj) {
2296 Thread* thread = Thread::current_or_null();
2297 if (thread != NULL && thread->is_Java_thread()) {
2298 // Can not take safepoint here.
2299 NoSafepointVerifier no_sfpt;
2300 // Can not take safepoint here so can not use state_for to get
2301 // jvmti thread state.
2302 JvmtiThreadState *state = ((JavaThread*)thread)->jvmti_thread_state();
2303 if (state != NULL) {
2304 // state is non NULL when VMObjectAllocEventCollector is enabled.
2305 JvmtiVMObjectAllocEventCollector *collector;
2306 collector = state->get_vm_object_alloc_event_collector();
2307 if (collector != NULL && collector->is_enabled()) {
2308 // Don't record classes as these will be notified via the ClassLoad
2309 // event.
2310 if (obj->klass() != SystemDictionary::Class_klass()) {
2311 collector->record_allocation(obj);
2312 }
2313 }
2314 }
2315 }
2316 }
2317
2318 // Collect all the sampled allocated objects.
2319 void JvmtiExport::record_sampled_internal_object_allocation(oop obj) {
2320 Thread* thread = Thread::current_or_null();
2321 if (thread != NULL && thread->is_Java_thread()) {
2322 // Can not take safepoint here.
2323 NoSafepointVerifier no_sfpt;
2324 // Can not take safepoint here so can not use state_for to get
2325 // jvmti thread state.
2326 JvmtiThreadState *state = ((JavaThread*)thread)->jvmti_thread_state();
2327 if (state != NULL) {
2328 // state is non NULL when SampledObjectAllocEventCollector is enabled.
2329 JvmtiSampledObjectAllocEventCollector *collector;
2330 collector = state->get_sampled_object_alloc_event_collector();
2331
2332 if (collector != NULL && collector->is_enabled()) {
2333 collector->record_allocation(obj);
2334 }
2335 }
2336 }
2337 }
2338
2339 void JvmtiExport::post_garbage_collection_finish() {
2340 Thread *thread = Thread::current(); // this event is posted from VM-Thread.
2341 EVT_TRIG_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH,
2342 ("[%s] garbage collection finish event triggered",
2343 JvmtiTrace::safe_get_thread_name(thread)));
2344 JvmtiEnvIterator it;
2345 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
2346 if (env->is_enabled(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH)) {
2347 EVT_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH,
2348 ("[%s] garbage collection finish event sent",
2349 JvmtiTrace::safe_get_thread_name(thread)));
2350 JvmtiThreadEventTransition jet(thread);
2351 // JNIEnv is NULL here because this event is posted from VM Thread
2352 jvmtiEventGarbageCollectionFinish callback = env->callbacks()->GarbageCollectionFinish;
2353 if (callback != NULL) {
2354 (*callback)(env->jvmti_external());
2355 }
2356 }
2357 }
2358 }
2359
2360 void JvmtiExport::post_garbage_collection_start() {
2361 Thread* thread = Thread::current(); // this event is posted from vm-thread.
2362 EVT_TRIG_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_START,
2363 ("[%s] garbage collection start event triggered",
2364 JvmtiTrace::safe_get_thread_name(thread)));
2365 JvmtiEnvIterator it;
2366 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
2367 if (env->is_enabled(JVMTI_EVENT_GARBAGE_COLLECTION_START)) {
2368 EVT_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_START,
2369 ("[%s] garbage collection start event sent",
2370 JvmtiTrace::safe_get_thread_name(thread)));
2371 JvmtiThreadEventTransition jet(thread);
2372 // JNIEnv is NULL here because this event is posted from VM Thread
2373 jvmtiEventGarbageCollectionStart callback = env->callbacks()->GarbageCollectionStart;
2374 if (callback != NULL) {
2375 (*callback)(env->jvmti_external());
2376 }
2377 }
2378 }
2379 }
2380
2381 void JvmtiExport::post_data_dump() {
2382 Thread *thread = Thread::current();
2383 EVT_TRIG_TRACE(JVMTI_EVENT_DATA_DUMP_REQUEST,
2384 ("[%s] data dump request event triggered",
2385 JvmtiTrace::safe_get_thread_name(thread)));
2386 JvmtiEnvIterator it;
2387 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
2388 if (env->is_enabled(JVMTI_EVENT_DATA_DUMP_REQUEST)) {
2389 EVT_TRACE(JVMTI_EVENT_DATA_DUMP_REQUEST,
2390 ("[%s] data dump request event sent",
2391 JvmtiTrace::safe_get_thread_name(thread)));
2392 JvmtiThreadEventTransition jet(thread);
2393 // JNIEnv is NULL here because this event is posted from VM Thread
2394 jvmtiEventDataDumpRequest callback = env->callbacks()->DataDumpRequest;
2395 if (callback != NULL) {
2396 (*callback)(env->jvmti_external());
2397 }
2398 }
2399 }
2400 }
2401
2402 void JvmtiExport::post_monitor_contended_enter(JavaThread *thread, ObjectMonitor *obj_mntr) {
2403 oop object = (oop)obj_mntr->object();
2404 JvmtiThreadState *state = thread->jvmti_thread_state();
2405 if (state == NULL) {
2406 return;
2407 }
2408
2409 HandleMark hm(thread);
2410 Handle h(thread, object);
2411
2412 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTER,
2413 ("[%s] montior contended enter event triggered",
2414 JvmtiTrace::safe_get_thread_name(thread)));
2415
2416 JvmtiEnvThreadStateIterator it(state);
2417 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
2418 if (ets->is_enabled(JVMTI_EVENT_MONITOR_CONTENDED_ENTER)) {
2419 EVT_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTER,
2420 ("[%s] monitor contended enter event sent",
2421 JvmtiTrace::safe_get_thread_name(thread)));
2422 JvmtiMonitorEventMark jem(thread, h());
2423 JvmtiEnv *env = ets->get_env();
2424 JvmtiThreadEventTransition jet(thread);
2425 jvmtiEventMonitorContendedEnter callback = env->callbacks()->MonitorContendedEnter;
2426 if (callback != NULL) {
2427 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_object());
2428 }
2429 }
2430 }
2431 }
2432
2433 void JvmtiExport::post_monitor_contended_entered(JavaThread *thread, ObjectMonitor *obj_mntr) {
2434 oop object = (oop)obj_mntr->object();
2435 JvmtiThreadState *state = thread->jvmti_thread_state();
2436 if (state == NULL) {
2437 return;
2438 }
2439
2440 HandleMark hm(thread);
2441 Handle h(thread, object);
2442
2443 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED,
2444 ("[%s] montior contended entered event triggered",
2445 JvmtiTrace::safe_get_thread_name(thread)));
2446
2447 JvmtiEnvThreadStateIterator it(state);
2448 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
2449 if (ets->is_enabled(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED)) {
2450 EVT_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED,
2451 ("[%s] monitor contended enter event sent",
2452 JvmtiTrace::safe_get_thread_name(thread)));
2453 JvmtiMonitorEventMark jem(thread, h());
2454 JvmtiEnv *env = ets->get_env();
2455 JvmtiThreadEventTransition jet(thread);
2456 jvmtiEventMonitorContendedEntered callback = env->callbacks()->MonitorContendedEntered;
2457 if (callback != NULL) {
2458 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_object());
2459 }
2460 }
2461 }
2462 }
2463
2464 void JvmtiExport::post_monitor_wait(JavaThread *thread, oop object,
2465 jlong timeout) {
2466 JvmtiThreadState *state = thread->jvmti_thread_state();
2467 if (state == NULL) {
2468 return;
2469 }
2470
2471 HandleMark hm(thread);
2472 Handle h(thread, object);
2473
2474 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_WAIT,
2475 ("[%s] montior wait event triggered",
2476 JvmtiTrace::safe_get_thread_name(thread)));
2477
2478 JvmtiEnvThreadStateIterator it(state);
2479 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
2480 if (ets->is_enabled(JVMTI_EVENT_MONITOR_WAIT)) {
2481 EVT_TRACE(JVMTI_EVENT_MONITOR_WAIT,
2482 ("[%s] monitor wait event sent",
2483 JvmtiTrace::safe_get_thread_name(thread)));
2484 JvmtiMonitorEventMark jem(thread, h());
2485 JvmtiEnv *env = ets->get_env();
2486 JvmtiThreadEventTransition jet(thread);
2487 jvmtiEventMonitorWait callback = env->callbacks()->MonitorWait;
2488 if (callback != NULL) {
2489 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
2490 jem.jni_object(), timeout);
2491 }
2492 }
2493 }
2494 }
2495
2496 void JvmtiExport::post_monitor_waited(JavaThread *thread, ObjectMonitor *obj_mntr, jboolean timed_out) {
2497 oop object = (oop)obj_mntr->object();
2498 JvmtiThreadState *state = thread->jvmti_thread_state();
2499 if (state == NULL) {
2500 return;
2501 }
2502
2503 HandleMark hm(thread);
2504 Handle h(thread, object);
2505
2506 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_WAITED,
2507 ("[%s] montior waited event triggered",
2508 JvmtiTrace::safe_get_thread_name(thread)));
2509
2510 JvmtiEnvThreadStateIterator it(state);
2511 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
2512 if (ets->is_enabled(JVMTI_EVENT_MONITOR_WAITED)) {
2513 EVT_TRACE(JVMTI_EVENT_MONITOR_WAITED,
2514 ("[%s] monitor waited event sent",
2515 JvmtiTrace::safe_get_thread_name(thread)));
2516 JvmtiMonitorEventMark jem(thread, h());
2517 JvmtiEnv *env = ets->get_env();
2518 JvmtiThreadEventTransition jet(thread);
2519 jvmtiEventMonitorWaited callback = env->callbacks()->MonitorWaited;
2520 if (callback != NULL) {
2521 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
2522 jem.jni_object(), timed_out);
2523 }
2524 }
2525 }
2526 }
2527
2528 void JvmtiExport::post_vm_object_alloc(JavaThread *thread, oop object) {
2529 EVT_TRIG_TRACE(JVMTI_EVENT_VM_OBJECT_ALLOC, ("[%s] Trg vm object alloc triggered",
2530 JvmtiTrace::safe_get_thread_name(thread)));
2531 if (object == NULL) {
2532 return;
2533 }
2534 HandleMark hm(thread);
2535 Handle h(thread, object);
2536 JvmtiEnvIterator it;
2537 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
2538 if (env->is_enabled(JVMTI_EVENT_VM_OBJECT_ALLOC)) {
2539 EVT_TRACE(JVMTI_EVENT_VM_OBJECT_ALLOC, ("[%s] Evt vmobject alloc sent %s",
2540 JvmtiTrace::safe_get_thread_name(thread),
2541 object==NULL? "NULL" : object->klass()->external_name()));
2542
2543 JvmtiObjectAllocEventMark jem(thread, h());
2544 JvmtiJavaThreadEventTransition jet(thread);
2545 jvmtiEventVMObjectAlloc callback = env->callbacks()->VMObjectAlloc;
2546 if (callback != NULL) {
2547 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
2548 jem.jni_jobject(), jem.jni_class(), jem.size());
2549 }
2550 }
2551 }
2552 }
2553
2554 void JvmtiExport::post_sampled_object_alloc(JavaThread *thread, oop object) {
2555 EVT_TRIG_TRACE(JVMTI_EVENT_SAMPLED_OBJECT_ALLOC,
2556 ("[%s] Trg sampled object alloc triggered",
2557 JvmtiTrace::safe_get_thread_name(thread)));
2558 if (object == NULL) {
2559 return;
2560 }
2561 HandleMark hm(thread);
2562 Handle h(thread, object);
2563 JvmtiEnvIterator it;
2564 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
2565 if (env->is_enabled(JVMTI_EVENT_SAMPLED_OBJECT_ALLOC)) {
2566 EVT_TRACE(JVMTI_EVENT_SAMPLED_OBJECT_ALLOC,
2567 ("[%s] Evt sampled object alloc sent %s",
2568 JvmtiTrace::safe_get_thread_name(thread),
2569 object == NULL ? "NULL" : object->klass()->external_name()));
2570
2571 JvmtiObjectAllocEventMark jem(thread, h());
2572 JvmtiJavaThreadEventTransition jet(thread);
2573 jvmtiEventSampledObjectAlloc callback = env->callbacks()->SampledObjectAlloc;
2574 if (callback != NULL) {
2575 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
2576 jem.jni_jobject(), jem.jni_class(), jem.size());
2577 }
2578 }
2579 }
2580 }
2581
2582 ////////////////////////////////////////////////////////////////////////////////////////////////
2583
2584 void JvmtiExport::cleanup_thread(JavaThread* thread) {
2585 assert(JavaThread::current() == thread, "thread is not current");
2586 MutexLocker mu(JvmtiThreadState_lock);
2587
2588 if (thread->jvmti_thread_state() != NULL) {
2589 // This has to happen after the thread state is removed, which is
2590 // why it is not in post_thread_end_event like its complement
2591 // Maybe both these functions should be rolled into the posts?
2592 JvmtiEventController::thread_ended(thread);
2593 }
2594 }
2595
2596 void JvmtiExport::clear_detected_exception(JavaThread* thread) {
2597 assert(JavaThread::current() == thread, "thread is not current");
2598
2599 JvmtiThreadState* state = thread->jvmti_thread_state();
2600 if (state != NULL) {
2601 state->clear_exception_state();
2602 }
2603 }
2604
2605 void JvmtiExport::oops_do(OopClosure* f) {
2606 JvmtiCurrentBreakpoints::oops_do(f);
2607 JvmtiObjectAllocEventCollector::oops_do_for_all_threads(f);
2608 }
2609
2610 void JvmtiExport::weak_oops_do(BoolObjectClosure* is_alive, OopClosure* f) {
2611 JvmtiTagMap::weak_oops_do(is_alive, f);
2612 }
2613
2614 void JvmtiExport::gc_epilogue() {
2615 JvmtiCurrentBreakpoints::gc_epilogue();
2616 }
2617
2618 // Onload raw monitor transition.
2619 void JvmtiExport::transition_pending_onload_raw_monitors() {
2620 JvmtiPendingMonitors::transition_raw_monitors();
2621 }
2622
2623 ////////////////////////////////////////////////////////////////////////////////////////////////
2624 #if INCLUDE_SERVICES
2625 // Attach is disabled if SERVICES is not included
2626
2627 // type for the Agent_OnAttach entry point
2628 extern "C" {
2629 typedef jint (JNICALL *OnAttachEntry_t)(JavaVM*, char *, void *);
2630 }
2631
2632 jint JvmtiExport::load_agent_library(const char *agent, const char *absParam,
2633 const char *options, outputStream* st) {
2634 char ebuf[1024] = {0};
2635 char buffer[JVM_MAXPATHLEN];
2636 void* library = NULL;
2637 jint result = JNI_ERR;
2638 const char *on_attach_symbols[] = AGENT_ONATTACH_SYMBOLS;
2639 size_t num_symbol_entries = ARRAY_SIZE(on_attach_symbols);
2640
2641 // The abs paramter should be "true" or "false"
2642 bool is_absolute_path = (absParam != NULL) && (strcmp(absParam,"true")==0);
2643
2644 // Initially marked as invalid. It will be set to valid if we can find the agent
2645 AgentLibrary *agent_lib = new AgentLibrary(agent, options, is_absolute_path, NULL);
2646
2647 // Check for statically linked in agent. If not found then if the path is
2648 // absolute we attempt to load the library. Otherwise we try to load it
2649 // from the standard dll directory.
2650
2651 if (!os::find_builtin_agent(agent_lib, on_attach_symbols, num_symbol_entries)) {
2652 if (is_absolute_path) {
2653 library = os::dll_load(agent, ebuf, sizeof ebuf);
2654 } else {
2655 // Try to load the agent from the standard dll directory
2656 if (os::dll_locate_lib(buffer, sizeof(buffer), Arguments::get_dll_dir(),
2657 agent)) {
2658 library = os::dll_load(buffer, ebuf, sizeof ebuf);
2659 }
2660 if (library == NULL) {
2661 // not found - try OS default library path
2662 if (os::dll_build_name(buffer, sizeof(buffer), agent)) {
2663 library = os::dll_load(buffer, ebuf, sizeof ebuf);
2664 }
2665 }
2666 }
2667 if (library != NULL) {
2668 agent_lib->set_os_lib(library);
2669 agent_lib->set_valid();
2670 }
2671 }
2672 // If the library was loaded then we attempt to invoke the Agent_OnAttach
2673 // function
2674 if (agent_lib->valid()) {
2675 // Lookup the Agent_OnAttach function
2676 OnAttachEntry_t on_attach_entry = NULL;
2677 on_attach_entry = CAST_TO_FN_PTR(OnAttachEntry_t,
2678 os::find_agent_function(agent_lib, false, on_attach_symbols, num_symbol_entries));
2679 if (on_attach_entry == NULL) {
2680 // Agent_OnAttach missing - unload library
2681 if (!agent_lib->is_static_lib()) {
2682 os::dll_unload(library);
2683 }
2684 st->print_cr("%s is not available in %s",
2685 on_attach_symbols[0], agent_lib->name());
2686 delete agent_lib;
2687 } else {
2688 // Invoke the Agent_OnAttach function
2689 JavaThread* THREAD = JavaThread::current();
2690 {
2691 extern struct JavaVM_ main_vm;
2692 JvmtiThreadEventMark jem(THREAD);
2693 JvmtiJavaThreadEventTransition jet(THREAD);
2694
2695 result = (*on_attach_entry)(&main_vm, (char*)options, NULL);
2696 }
2697
2698 // Agent_OnAttach may have used JNI
2699 if (HAS_PENDING_EXCEPTION) {
2700 CLEAR_PENDING_EXCEPTION;
2701 }
2702
2703 // If OnAttach returns JNI_OK then we add it to the list of
2704 // agent libraries so that we can call Agent_OnUnload later.
2705 if (result == JNI_OK) {
2706 Arguments::add_loaded_agent(agent_lib);
2707 } else {
2708 delete agent_lib;
2709 }
2710
2711 // Agent_OnAttach executed so completion status is JNI_OK
2712 st->print_cr("return code: %d", result);
2713 result = JNI_OK;
2714 }
2715 } else {
2716 st->print_cr("%s was not loaded.", agent);
2717 if (*ebuf != '\0') {
2718 st->print_cr("%s", ebuf);
2719 }
2720 }
2721 return result;
2722 }
2723
2724 #endif // INCLUDE_SERVICES
2725 ////////////////////////////////////////////////////////////////////////////////////////////////
2726
2727 // Setup current current thread for event collection.
2728 void JvmtiEventCollector::setup_jvmti_thread_state() {
2729 // set this event collector to be the current one.
2730 JvmtiThreadState* state = JvmtiThreadState::state_for(JavaThread::current());
2731 // state can only be NULL if the current thread is exiting which
2732 // should not happen since we're trying to configure for event collection
2733 guarantee(state != NULL, "exiting thread called setup_jvmti_thread_state");
2734 if (is_vm_object_alloc_event()) {
2735 JvmtiVMObjectAllocEventCollector *prev = state->get_vm_object_alloc_event_collector();
2736
2737 // If we have a previous collector and it is disabled, it means this allocation came from a
2738 // callback induced VM Object allocation, do not register this collector then.
2739 if (prev && !prev->is_enabled()) {
2740 return;
2741 }
2742 _prev = prev;
2743 state->set_vm_object_alloc_event_collector((JvmtiVMObjectAllocEventCollector *)this);
2744 } else if (is_dynamic_code_event()) {
2745 _prev = state->get_dynamic_code_event_collector();
2746 state->set_dynamic_code_event_collector((JvmtiDynamicCodeEventCollector *)this);
2747 } else if (is_sampled_object_alloc_event()) {
2748 JvmtiSampledObjectAllocEventCollector *prev = state->get_sampled_object_alloc_event_collector();
2749
2750 if (prev) {
2751 // JvmtiSampledObjectAllocEventCollector wants only one active collector
2752 // enabled. This allows to have a collector detect a user code requiring
2753 // a sample in the callback.
2754 return;
2755 }
2756 state->set_sampled_object_alloc_event_collector((JvmtiSampledObjectAllocEventCollector*) this);
2757 }
2758
2759 _unset_jvmti_thread_state = true;
2760 }
2761
2762 // Unset current event collection in this thread and reset it with previous
2763 // collector.
2764 void JvmtiEventCollector::unset_jvmti_thread_state() {
2765 if (!_unset_jvmti_thread_state) {
2766 return;
2767 }
2768
2769 JvmtiThreadState* state = JavaThread::current()->jvmti_thread_state();
2770 if (state != NULL) {
2771 // restore the previous event collector (if any)
2772 if (is_vm_object_alloc_event()) {
2773 if (state->get_vm_object_alloc_event_collector() == this) {
2774 state->set_vm_object_alloc_event_collector((JvmtiVMObjectAllocEventCollector *)_prev);
2775 } else {
2776 // this thread's jvmti state was created during the scope of
2777 // the event collector.
2778 }
2779 } else if (is_dynamic_code_event()) {
2780 if (state->get_dynamic_code_event_collector() == this) {
2781 state->set_dynamic_code_event_collector((JvmtiDynamicCodeEventCollector *)_prev);
2782 } else {
2783 // this thread's jvmti state was created during the scope of
2784 // the event collector.
2785 }
2786 } else if (is_sampled_object_alloc_event()) {
2787 if (state->get_sampled_object_alloc_event_collector() == this) {
2788 state->set_sampled_object_alloc_event_collector((JvmtiSampledObjectAllocEventCollector*)_prev);
2789 } else {
2790 // this thread's jvmti state was created during the scope of
2791 // the event collector.
2792 }
2793 }
2794 }
2795 }
2796
2797 // create the dynamic code event collector
2798 JvmtiDynamicCodeEventCollector::JvmtiDynamicCodeEventCollector() : _code_blobs(NULL) {
2799 if (JvmtiExport::should_post_dynamic_code_generated()) {
2800 setup_jvmti_thread_state();
2801 }
2802 }
2803
2804 // iterate over any code blob descriptors collected and post a
2805 // DYNAMIC_CODE_GENERATED event to the profiler.
2806 JvmtiDynamicCodeEventCollector::~JvmtiDynamicCodeEventCollector() {
2807 assert(!JavaThread::current()->owns_locks(), "all locks must be released to post deferred events");
2808 // iterate over any code blob descriptors that we collected
2809 if (_code_blobs != NULL) {
2810 for (int i=0; i<_code_blobs->length(); i++) {
2811 JvmtiCodeBlobDesc* blob = _code_blobs->at(i);
2812 JvmtiExport::post_dynamic_code_generated(blob->name(), blob->code_begin(), blob->code_end());
2813 FreeHeap(blob);
2814 }
2815 delete _code_blobs;
2816 }
2817 unset_jvmti_thread_state();
2818 }
2819
2820 // register a stub
2821 void JvmtiDynamicCodeEventCollector::register_stub(const char* name, address start, address end) {
2822 if (_code_blobs == NULL) {
2823 _code_blobs = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<JvmtiCodeBlobDesc*>(1,true);
2824 }
2825 _code_blobs->append(new JvmtiCodeBlobDesc(name, start, end));
2826 }
2827
2828 // Setup current thread to record vm allocated objects.
2829 JvmtiObjectAllocEventCollector::JvmtiObjectAllocEventCollector() :
2830 _allocated(NULL), _enable(false), _post_callback(NULL) {
2831 }
2832
2833 // Post vm_object_alloc event for vm allocated objects visible to java
2834 // world.
2835 void JvmtiObjectAllocEventCollector::generate_call_for_allocated() {
2836 if (_allocated) {
2837 set_enabled(false);
2838 for (int i = 0; i < _allocated->length(); i++) {
2839 oop obj = _allocated->at(i);
2840 _post_callback(JavaThread::current(), obj);
2841 }
2842 delete _allocated, _allocated = NULL;
2843 }
2844 }
2845
2846 void JvmtiObjectAllocEventCollector::record_allocation(oop obj) {
2847 assert(is_enabled(), "Object alloc event collector is not enabled");
2848 if (_allocated == NULL) {
2849 _allocated = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<oop>(1, true);
2850 }
2851 _allocated->push(obj);
2852 }
2853
2854 // GC support.
2855 void JvmtiObjectAllocEventCollector::oops_do(OopClosure* f) {
2856 if (_allocated) {
2857 for(int i = _allocated->length() - 1; i >= 0; i--) {
2858 if (_allocated->at(i) != NULL) {
2859 f->do_oop(_allocated->adr_at(i));
2860 }
2861 }
2862 }
2863 }
2864
2865 void JvmtiObjectAllocEventCollector::oops_do_for_all_threads(OopClosure* f) {
2866 // no-op if jvmti not enabled
2867 if (!JvmtiEnv::environments_might_exist()) {
2868 return;
2869 }
2870
2871 for (JavaThreadIteratorWithHandle jtiwh; JavaThread *jthr = jtiwh.next(); ) {
2872 JvmtiThreadState *state = jthr->jvmti_thread_state();
2873 if (state != NULL) {
2874 JvmtiObjectAllocEventCollector *collector;
2875 collector = state->get_vm_object_alloc_event_collector();
2876 while (collector != NULL) {
2877 collector->oops_do(f);
2878 collector = (JvmtiObjectAllocEventCollector*) collector->get_prev();
2879 }
2880
2881 collector = state->get_sampled_object_alloc_event_collector();
2882 while (collector != NULL) {
2883 collector->oops_do(f);
2884 collector = (JvmtiObjectAllocEventCollector*) collector->get_prev();
2885 }
2886 }
2887 }
2888 }
2889
2890
2891 // Disable collection of VMObjectAlloc events
2892 NoJvmtiVMObjectAllocMark::NoJvmtiVMObjectAllocMark() : _collector(NULL) {
2893 // a no-op if VMObjectAlloc event is not enabled
2894 if (!JvmtiExport::should_post_vm_object_alloc()) {
2895 return;
2896 }
2897 Thread* thread = Thread::current_or_null();
2898 if (thread != NULL && thread->is_Java_thread()) {
2899 JavaThread* current_thread = (JavaThread*)thread;
2900 JvmtiThreadState *state = current_thread->jvmti_thread_state();
2901 if (state != NULL) {
2902 JvmtiVMObjectAllocEventCollector *collector;
2903 collector = state->get_vm_object_alloc_event_collector();
2904 if (collector != NULL && collector->is_enabled()) {
2905 _collector = collector;
2906 _collector->set_enabled(false);
2907 }
2908 }
2909 }
2910 }
2911
2912 // Re-Enable collection of VMObjectAlloc events (if previously enabled)
2913 NoJvmtiVMObjectAllocMark::~NoJvmtiVMObjectAllocMark() {
2914 if (was_enabled()) {
2915 _collector->set_enabled(true);
2916 }
2917 };
2918
2919 // Setup current thread to record vm allocated objects.
2920 JvmtiVMObjectAllocEventCollector::JvmtiVMObjectAllocEventCollector() {
2921 if (JvmtiExport::should_post_vm_object_alloc()) {
2922 _enable = true;
2923 setup_jvmti_thread_state();
2924 _post_callback = JvmtiExport::post_vm_object_alloc;
2925 }
2926 }
2927
2928 JvmtiVMObjectAllocEventCollector::~JvmtiVMObjectAllocEventCollector() {
2929 if (_enable) {
2930 generate_call_for_allocated();
2931 }
2932 unset_jvmti_thread_state();
2933 }
2934
2935 bool JvmtiSampledObjectAllocEventCollector::object_alloc_is_safe_to_sample() {
2936 Thread* thread = Thread::current();
2937 // Really only sample allocations if this is a JavaThread and not the compiler
2938 // thread.
2939 if (!thread->is_Java_thread() || thread->is_Compiler_thread()) {
2940 return false;
2941 }
2942
2943 if (Compile_lock->owner() == thread ||
2944 MultiArray_lock->owner() == thread) {
2945 return false;
2946 }
2947 return true;
2948 }
2949
2950 // Setup current thread to record sampled allocated objects.
2951 JvmtiSampledObjectAllocEventCollector::JvmtiSampledObjectAllocEventCollector() {
2952 if (JvmtiExport::should_post_sampled_object_alloc()) {
2953 if (!object_alloc_is_safe_to_sample()) {
2954 return;
2955 }
2956
2957 _enable = true;
2958 setup_jvmti_thread_state();
2959 _post_callback = JvmtiExport::post_sampled_object_alloc;
2960 }
2961 }
2962
2963 JvmtiSampledObjectAllocEventCollector::~JvmtiSampledObjectAllocEventCollector() {
2964 if (!_enable) {
2965 return;
2966 }
2967
2968 generate_call_for_allocated();
2969 unset_jvmti_thread_state();
2970
2971 // Unset the sampling collector as present in assertion mode only.
2972 assert(Thread::current()->is_Java_thread(),
2973 "Should always be in a Java thread");
2974 }
2975
2976 JvmtiGCMarker::JvmtiGCMarker() {
2977 // if there aren't any JVMTI environments then nothing to do
2978 if (!JvmtiEnv::environments_might_exist()) {
2979 return;
2980 }
2981
2982 if (JvmtiExport::should_post_garbage_collection_start()) {
2983 JvmtiExport::post_garbage_collection_start();
2984 }
2985
2986 if (SafepointSynchronize::is_at_safepoint()) {
2987 // Do clean up tasks that need to be done at a safepoint
2988 JvmtiEnvBase::check_for_periodic_clean_up();
2989 }
2990 }
2991
2992 JvmtiGCMarker::~JvmtiGCMarker() {
2993 // if there aren't any JVMTI environments then nothing to do
2994 if (!JvmtiEnv::environments_might_exist()) {
2995 return;
2996 }
2997
2998 // JVMTI notify gc finish
2999 if (JvmtiExport::should_post_garbage_collection_finish()) {
3000 JvmtiExport::post_garbage_collection_finish();
3001 }
3002 }