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::_should_post_class_file_load_hook = false;
998
999 // this entry is for class file load hook on class load, redefine and retransform
1000 bool JvmtiExport::post_class_file_load_hook(Symbol* h_name,
1001 Handle class_loader,
1002 Handle h_protection_domain,
1003 unsigned char **data_ptr,
1004 unsigned char **end_ptr,
1005 JvmtiCachedClassFileData **cache_ptr) {
1006 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) {
1007 return false;
1008 }
1009
1010 JvmtiClassFileLoadHookPoster poster(h_name, class_loader,
1011 h_protection_domain,
1012 data_ptr, end_ptr,
1013 cache_ptr);
1014 poster.post();
1015 return poster.has_been_modified();
1016 }
1017
1018 void JvmtiExport::report_unsupported(bool on) {
1019 // If any JVMTI service is turned on, we need to exit before native code
1020 // tries to access nonexistant services.
1021 if (on) {
1022 vm_exit_during_initialization("Java Kernel does not support JVMTI.");
1023 }
1024 }
1025
1026
1027 static inline Klass* oop_to_klass(oop obj) {
1028 Klass* k = obj->klass();
1029
1030 // if the object is a java.lang.Class then return the java mirror
1031 if (k == SystemDictionary::Class_klass()) {
1032 if (!java_lang_Class::is_primitive(obj)) {
1033 k = java_lang_Class::as_Klass(obj);
1034 assert(k != NULL, "class for non-primitive mirror must exist");
1035 }
1036 }
1037 return k;
1038 }
1039
1040 class JvmtiObjectAllocEventMark : public JvmtiClassEventMark {
1041 private:
1042 jobject _jobj;
1043 jlong _size;
1044 public:
1045 JvmtiObjectAllocEventMark(JavaThread *thread, oop obj) : JvmtiClassEventMark(thread, oop_to_klass(obj)) {
1046 _jobj = (jobject)to_jobject(obj);
1047 _size = Universe::heap()->obj_size(obj) * wordSize;
1048 };
1049 jobject jni_jobject() { return _jobj; }
1050 jlong size() { return _size; }
1051 };
1052
1053 class JvmtiCompiledMethodLoadEventMark : public JvmtiMethodEventMark {
1054 private:
1055 jint _code_size;
1056 const void *_code_data;
1057 jint _map_length;
1058 jvmtiAddrLocationMap *_map;
1059 const void *_compile_info;
1060 public:
1061 JvmtiCompiledMethodLoadEventMark(JavaThread *thread, nmethod *nm, void* compile_info_ptr = NULL)
1062 : JvmtiMethodEventMark(thread,methodHandle(thread, nm->method())) {
1063 _code_data = nm->insts_begin();
1064 _code_size = nm->insts_size();
1065 _compile_info = compile_info_ptr; // Set void pointer of compiledMethodLoad Event. Default value is NULL.
1066 JvmtiCodeBlobEvents::build_jvmti_addr_location_map(nm, &_map, &_map_length);
1067 }
1068 ~JvmtiCompiledMethodLoadEventMark() {
1069 FREE_C_HEAP_ARRAY(jvmtiAddrLocationMap, _map);
1070 }
1071
1072 jint code_size() { return _code_size; }
1073 const void *code_data() { return _code_data; }
1074 jint map_length() { return _map_length; }
1075 const jvmtiAddrLocationMap* map() { return _map; }
1076 const void *compile_info() { return _compile_info; }
1077 };
1078
1079
1080
1081 class JvmtiMonitorEventMark : public JvmtiThreadEventMark {
1082 private:
1083 jobject _jobj;
1084 public:
1085 JvmtiMonitorEventMark(JavaThread *thread, oop object)
1086 : JvmtiThreadEventMark(thread){
1087 _jobj = to_jobject(object);
1088 }
1089 jobject jni_object() { return _jobj; }
1090 };
1091
1092 ///////////////////////////////////////////////////////////////
1093 //
1094 // pending CompiledMethodUnload support
1095 //
1096
1097 void JvmtiExport::post_compiled_method_unload(
1098 jmethodID method, const void *code_begin) {
1099 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) {
1100 return;
1101 }
1102 JavaThread* thread = JavaThread::current();
1103 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_UNLOAD,
1104 ("[%s] method compile unload event triggered",
1105 JvmtiTrace::safe_get_thread_name(thread)));
1106
1107 // post the event for each environment that has this event enabled.
1108 JvmtiEnvIterator it;
1109 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1110 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_UNLOAD)) {
1111 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) {
1112 continue;
1113 }
1114 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_UNLOAD,
1115 ("[%s] class compile method unload event sent jmethodID " PTR_FORMAT,
1116 JvmtiTrace::safe_get_thread_name(thread), p2i(method)));
1117
1118 ResourceMark rm(thread);
1119
1120 JvmtiEventMark jem(thread);
1121 JvmtiJavaThreadEventTransition jet(thread);
1122 jvmtiEventCompiledMethodUnload callback = env->callbacks()->CompiledMethodUnload;
1123 if (callback != NULL) {
1124 (*callback)(env->jvmti_external(), method, code_begin);
1125 }
1126 }
1127 }
1128 }
1129
1130 ///////////////////////////////////////////////////////////////
1131 //
1132 // JvmtiExport
1133 //
1134
1135 void JvmtiExport::post_raw_breakpoint(JavaThread *thread, Method* method, address location) {
1136 HandleMark hm(thread);
1137 methodHandle mh(thread, method);
1138
1139 JvmtiThreadState *state = thread->jvmti_thread_state();
1140 if (state == NULL) {
1141 return;
1142 }
1143 EVT_TRIG_TRACE(JVMTI_EVENT_BREAKPOINT, ("[%s] Trg Breakpoint triggered",
1144 JvmtiTrace::safe_get_thread_name(thread)));
1145 JvmtiEnvThreadStateIterator it(state);
1146 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1147 ets->compare_and_set_current_location(mh(), location, JVMTI_EVENT_BREAKPOINT);
1148 if (!ets->breakpoint_posted() && ets->is_enabled(JVMTI_EVENT_BREAKPOINT)) {
1149 ThreadState old_os_state = thread->osthread()->get_state();
1150 thread->osthread()->set_state(BREAKPOINTED);
1151 EVT_TRACE(JVMTI_EVENT_BREAKPOINT, ("[%s] Evt Breakpoint sent %s.%s @ " INTX_FORMAT,
1152 JvmtiTrace::safe_get_thread_name(thread),
1153 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1154 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1155 location - mh()->code_base() ));
1156
1157 JvmtiEnv *env = ets->get_env();
1158 JvmtiLocationEventMark jem(thread, mh, location);
1159 JvmtiJavaThreadEventTransition jet(thread);
1160 jvmtiEventBreakpoint callback = env->callbacks()->Breakpoint;
1161 if (callback != NULL) {
1162 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1163 jem.jni_methodID(), jem.location());
1164 }
1165
1166 ets->set_breakpoint_posted();
1167 thread->osthread()->set_state(old_os_state);
1168 }
1169 }
1170 }
1171
1172 //////////////////////////////////////////////////////////////////////////////
1173
1174 bool JvmtiExport::_can_get_source_debug_extension = false;
1175 bool JvmtiExport::_can_maintain_original_method_order = false;
1176 bool JvmtiExport::_can_post_interpreter_events = false;
1177 bool JvmtiExport::_can_post_on_exceptions = false;
1178 bool JvmtiExport::_can_post_breakpoint = false;
1179 bool JvmtiExport::_can_post_field_access = false;
1180 bool JvmtiExport::_can_post_field_modification = false;
1181 bool JvmtiExport::_can_post_method_entry = false;
1182 bool JvmtiExport::_can_post_method_exit = false;
1183 bool JvmtiExport::_can_pop_frame = false;
1184 bool JvmtiExport::_can_force_early_return = false;
1185
1186 bool JvmtiExport::_early_vmstart_recorded = false;
1187
1188 bool JvmtiExport::_should_post_single_step = false;
1189 bool JvmtiExport::_should_post_field_access = false;
1190 bool JvmtiExport::_should_post_field_modification = false;
1191 bool JvmtiExport::_should_post_class_load = false;
1192 bool JvmtiExport::_should_post_class_prepare = false;
1193 bool JvmtiExport::_should_post_class_unload = false;
1194 bool JvmtiExport::_should_post_thread_life = false;
1195 bool JvmtiExport::_should_clean_up_heap_objects = false;
1196 bool JvmtiExport::_should_post_native_method_bind = false;
1197 bool JvmtiExport::_should_post_dynamic_code_generated = false;
1198 bool JvmtiExport::_should_post_data_dump = false;
1199 bool JvmtiExport::_should_post_compiled_method_load = false;
1200 bool JvmtiExport::_should_post_compiled_method_unload = false;
1201 bool JvmtiExport::_should_post_monitor_contended_enter = false;
1202 bool JvmtiExport::_should_post_monitor_contended_entered = false;
1203 bool JvmtiExport::_should_post_monitor_wait = false;
1204 bool JvmtiExport::_should_post_monitor_waited = false;
1205 bool JvmtiExport::_should_post_garbage_collection_start = false;
1206 bool JvmtiExport::_should_post_garbage_collection_finish = false;
1207 bool JvmtiExport::_should_post_object_free = false;
1208 bool JvmtiExport::_should_post_resource_exhausted = false;
1209 bool JvmtiExport::_should_post_vm_object_alloc = false;
1210 bool JvmtiExport::_should_post_sampled_object_alloc = false;
1211 bool JvmtiExport::_should_post_on_exceptions = false;
1212
1213 ////////////////////////////////////////////////////////////////////////////////////////////////
1214
1215
1216 //
1217 // JVMTI single step management
1218 //
1219 void JvmtiExport::at_single_stepping_point(JavaThread *thread, Method* method, address location) {
1220 assert(JvmtiExport::should_post_single_step(), "must be single stepping");
1221
1222 HandleMark hm(thread);
1223 methodHandle mh(thread, method);
1224
1225 // update information about current location and post a step event
1226 JvmtiThreadState *state = thread->jvmti_thread_state();
1227 if (state == NULL) {
1228 return;
1229 }
1230 EVT_TRIG_TRACE(JVMTI_EVENT_SINGLE_STEP, ("[%s] Trg Single Step triggered",
1231 JvmtiTrace::safe_get_thread_name(thread)));
1232 if (!state->hide_single_stepping()) {
1233 if (state->is_pending_step_for_popframe()) {
1234 state->process_pending_step_for_popframe();
1235 }
1236 if (state->is_pending_step_for_earlyret()) {
1237 state->process_pending_step_for_earlyret();
1238 }
1239 JvmtiExport::post_single_step(thread, mh(), location);
1240 }
1241 }
1242
1243
1244 void JvmtiExport::expose_single_stepping(JavaThread *thread) {
1245 JvmtiThreadState *state = thread->jvmti_thread_state();
1246 if (state != NULL) {
1247 state->clear_hide_single_stepping();
1248 }
1249 }
1250
1251
1252 bool JvmtiExport::hide_single_stepping(JavaThread *thread) {
1253 JvmtiThreadState *state = thread->jvmti_thread_state();
1254 if (state != NULL && state->is_enabled(JVMTI_EVENT_SINGLE_STEP)) {
1255 state->set_hide_single_stepping();
1256 return true;
1257 } else {
1258 return false;
1259 }
1260 }
1261
1262 void JvmtiExport::post_class_load(JavaThread *thread, Klass* klass) {
1263 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) {
1264 return;
1265 }
1266 HandleMark hm(thread);
1267
1268 EVT_TRIG_TRACE(JVMTI_EVENT_CLASS_LOAD, ("[%s] Trg Class Load triggered",
1269 JvmtiTrace::safe_get_thread_name(thread)));
1270 JvmtiThreadState* state = thread->jvmti_thread_state();
1271 if (state == NULL) {
1272 return;
1273 }
1274 JvmtiEnvThreadStateIterator it(state);
1275 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1276 if (ets->is_enabled(JVMTI_EVENT_CLASS_LOAD)) {
1277 JvmtiEnv *env = ets->get_env();
1278 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) {
1279 continue;
1280 }
1281 EVT_TRACE(JVMTI_EVENT_CLASS_LOAD, ("[%s] Evt Class Load sent %s",
1282 JvmtiTrace::safe_get_thread_name(thread),
1283 klass==NULL? "NULL" : klass->external_name() ));
1284 JvmtiClassEventMark jem(thread, klass);
1285 JvmtiJavaThreadEventTransition jet(thread);
1286 jvmtiEventClassLoad callback = env->callbacks()->ClassLoad;
1287 if (callback != NULL) {
1288 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_class());
1289 }
1290 }
1291 }
1292 }
1293
1294
1295 void JvmtiExport::post_class_prepare(JavaThread *thread, Klass* klass) {
1296 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) {
1297 return;
1298 }
1299 HandleMark hm(thread);
1300
1301 EVT_TRIG_TRACE(JVMTI_EVENT_CLASS_PREPARE, ("[%s] Trg Class Prepare triggered",
1302 JvmtiTrace::safe_get_thread_name(thread)));
1303 JvmtiThreadState* state = thread->jvmti_thread_state();
1304 if (state == NULL) {
1305 return;
1306 }
1307 JvmtiEnvThreadStateIterator it(state);
1308 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1309 if (ets->is_enabled(JVMTI_EVENT_CLASS_PREPARE)) {
1310 JvmtiEnv *env = ets->get_env();
1311 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) {
1312 continue;
1313 }
1314 EVT_TRACE(JVMTI_EVENT_CLASS_PREPARE, ("[%s] Evt Class Prepare sent %s",
1315 JvmtiTrace::safe_get_thread_name(thread),
1316 klass==NULL? "NULL" : klass->external_name() ));
1317 JvmtiClassEventMark jem(thread, klass);
1318 JvmtiJavaThreadEventTransition jet(thread);
1319 jvmtiEventClassPrepare callback = env->callbacks()->ClassPrepare;
1320 if (callback != NULL) {
1321 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_class());
1322 }
1323 }
1324 }
1325 }
1326
1327 void JvmtiExport::post_class_unload(Klass* klass) {
1328 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) {
1329 return;
1330 }
1331 Thread *thread = Thread::current();
1332 HandleMark hm(thread);
1333
1334 EVT_TRIG_TRACE(EXT_EVENT_CLASS_UNLOAD, ("[?] Trg Class Unload triggered" ));
1335 if (JvmtiEventController::is_enabled((jvmtiEvent)EXT_EVENT_CLASS_UNLOAD)) {
1336 assert(thread->is_VM_thread(), "wrong thread");
1337
1338 // get JavaThread for whom we are proxy
1339 Thread *calling_thread = ((VMThread *)thread)->vm_operation()->calling_thread();
1340 if (!calling_thread->is_Java_thread()) {
1341 // cannot post an event to a non-JavaThread
1342 return;
1343 }
1344 JavaThread *real_thread = (JavaThread *)calling_thread;
1345
1346 JvmtiEnvIterator it;
1347 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1348 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) {
1349 continue;
1350 }
1351 if (env->is_enabled((jvmtiEvent)EXT_EVENT_CLASS_UNLOAD)) {
1352 EVT_TRACE(EXT_EVENT_CLASS_UNLOAD, ("[?] Evt Class Unload sent %s",
1353 klass==NULL? "NULL" : klass->external_name() ));
1354
1355 // do everything manually, since this is a proxy - needs special care
1356 JNIEnv* jni_env = real_thread->jni_environment();
1357 jthread jt = (jthread)JNIHandles::make_local(real_thread, real_thread->threadObj());
1358 jclass jk = (jclass)JNIHandles::make_local(real_thread, klass->java_mirror());
1359
1360 // Before we call the JVMTI agent, we have to set the state in the
1361 // thread for which we are proxying.
1362 JavaThreadState prev_state = real_thread->thread_state();
1363 assert(((Thread *)real_thread)->is_ConcurrentGC_thread() ||
1364 (real_thread->is_Java_thread() && prev_state == _thread_blocked),
1365 "should be ConcurrentGCThread or JavaThread at safepoint");
1366 real_thread->set_thread_state(_thread_in_native);
1367
1368 jvmtiExtensionEvent callback = env->ext_callbacks()->ClassUnload;
1369 if (callback != NULL) {
1370 (*callback)(env->jvmti_external(), jni_env, jt, jk);
1371 }
1372
1373 assert(real_thread->thread_state() == _thread_in_native,
1374 "JavaThread should be in native");
1375 real_thread->set_thread_state(prev_state);
1376
1377 JNIHandles::destroy_local(jk);
1378 JNIHandles::destroy_local(jt);
1379 }
1380 }
1381 }
1382 }
1383
1384
1385 void JvmtiExport::post_thread_start(JavaThread *thread) {
1386 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) {
1387 return;
1388 }
1389 assert(thread->thread_state() == _thread_in_vm, "must be in vm state");
1390
1391 EVT_TRIG_TRACE(JVMTI_EVENT_THREAD_START, ("[%s] Trg Thread Start event triggered",
1392 JvmtiTrace::safe_get_thread_name(thread)));
1393
1394 // do JVMTI thread initialization (if needed)
1395 JvmtiEventController::thread_started(thread);
1396
1397 // Do not post thread start event for hidden java thread.
1398 if (JvmtiEventController::is_enabled(JVMTI_EVENT_THREAD_START) &&
1399 !thread->is_hidden_from_external_view()) {
1400 JvmtiEnvIterator it;
1401 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1402 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) {
1403 continue;
1404 }
1405 if (env->is_enabled(JVMTI_EVENT_THREAD_START)) {
1406 EVT_TRACE(JVMTI_EVENT_THREAD_START, ("[%s] Evt Thread Start event sent",
1407 JvmtiTrace::safe_get_thread_name(thread) ));
1408
1409 JvmtiThreadEventMark jem(thread);
1410 JvmtiJavaThreadEventTransition jet(thread);
1411 jvmtiEventThreadStart callback = env->callbacks()->ThreadStart;
1412 if (callback != NULL) {
1413 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread());
1414 }
1415 }
1416 }
1417 }
1418 }
1419
1420
1421 void JvmtiExport::post_thread_end(JavaThread *thread) {
1422 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) {
1423 return;
1424 }
1425 EVT_TRIG_TRACE(JVMTI_EVENT_THREAD_END, ("[%s] Trg Thread End event triggered",
1426 JvmtiTrace::safe_get_thread_name(thread)));
1427
1428 JvmtiThreadState *state = thread->jvmti_thread_state();
1429 if (state == NULL) {
1430 return;
1431 }
1432
1433 // Do not post thread end event for hidden java thread.
1434 if (state->is_enabled(JVMTI_EVENT_THREAD_END) &&
1435 !thread->is_hidden_from_external_view()) {
1436
1437 JvmtiEnvThreadStateIterator it(state);
1438 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1439 if (ets->is_enabled(JVMTI_EVENT_THREAD_END)) {
1440 JvmtiEnv *env = ets->get_env();
1441 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) {
1442 continue;
1443 }
1444 EVT_TRACE(JVMTI_EVENT_THREAD_END, ("[%s] Evt Thread End event sent",
1445 JvmtiTrace::safe_get_thread_name(thread) ));
1446
1447 JvmtiThreadEventMark jem(thread);
1448 JvmtiJavaThreadEventTransition jet(thread);
1449 jvmtiEventThreadEnd callback = env->callbacks()->ThreadEnd;
1450 if (callback != NULL) {
1451 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread());
1452 }
1453 }
1454 }
1455 }
1456 }
1457
1458 void JvmtiExport::post_object_free(JvmtiEnv* env, jlong tag) {
1459 assert(SafepointSynchronize::is_at_safepoint(), "must be executed at safepoint");
1460 assert(env->is_enabled(JVMTI_EVENT_OBJECT_FREE), "checking");
1461
1462 EVT_TRIG_TRACE(JVMTI_EVENT_OBJECT_FREE, ("[?] Trg Object Free triggered" ));
1463 EVT_TRACE(JVMTI_EVENT_OBJECT_FREE, ("[?] Evt Object Free sent"));
1464
1465 jvmtiEventObjectFree callback = env->callbacks()->ObjectFree;
1466 if (callback != NULL) {
1467 (*callback)(env->jvmti_external(), tag);
1468 }
1469 }
1470
1471 void JvmtiExport::post_resource_exhausted(jint resource_exhausted_flags, const char* description) {
1472 EVT_TRIG_TRACE(JVMTI_EVENT_RESOURCE_EXHAUSTED, ("Trg resource exhausted event triggered" ));
1473
1474 JvmtiEnvIterator it;
1475 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1476 if (env->is_enabled(JVMTI_EVENT_RESOURCE_EXHAUSTED)) {
1477 EVT_TRACE(JVMTI_EVENT_RESOURCE_EXHAUSTED, ("Evt resource exhausted event sent" ));
1478
1479 JavaThread *thread = JavaThread::current();
1480 JvmtiThreadEventMark jem(thread);
1481 JvmtiJavaThreadEventTransition jet(thread);
1482 jvmtiEventResourceExhausted callback = env->callbacks()->ResourceExhausted;
1483 if (callback != NULL) {
1484 (*callback)(env->jvmti_external(), jem.jni_env(),
1485 resource_exhausted_flags, NULL, description);
1486 }
1487 }
1488 }
1489 }
1490
1491 void JvmtiExport::post_method_entry(JavaThread *thread, Method* method, frame current_frame) {
1492 HandleMark hm(thread);
1493 methodHandle mh(thread, method);
1494
1495 EVT_TRIG_TRACE(JVMTI_EVENT_METHOD_ENTRY, ("[%s] Trg Method Entry triggered %s.%s",
1496 JvmtiTrace::safe_get_thread_name(thread),
1497 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1498 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1499
1500 JvmtiThreadState* state = thread->jvmti_thread_state();
1501 if (state == NULL || !state->is_interp_only_mode()) {
1502 // for any thread that actually wants method entry, interp_only_mode is set
1503 return;
1504 }
1505
1506 state->incr_cur_stack_depth();
1507
1508 if (state->is_enabled(JVMTI_EVENT_METHOD_ENTRY)) {
1509 JvmtiEnvThreadStateIterator it(state);
1510 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1511 if (ets->is_enabled(JVMTI_EVENT_METHOD_ENTRY)) {
1512 EVT_TRACE(JVMTI_EVENT_METHOD_ENTRY, ("[%s] Evt Method Entry sent %s.%s",
1513 JvmtiTrace::safe_get_thread_name(thread),
1514 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1515 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1516
1517 JvmtiEnv *env = ets->get_env();
1518 JvmtiMethodEventMark jem(thread, mh);
1519 JvmtiJavaThreadEventTransition jet(thread);
1520 jvmtiEventMethodEntry callback = env->callbacks()->MethodEntry;
1521 if (callback != NULL) {
1522 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_methodID());
1523 }
1524 }
1525 }
1526 }
1527 }
1528
1529 void JvmtiExport::post_method_exit(JavaThread *thread, Method* method, frame current_frame) {
1530 HandleMark hm(thread);
1531 methodHandle mh(thread, method);
1532
1533 EVT_TRIG_TRACE(JVMTI_EVENT_METHOD_EXIT, ("[%s] Trg Method Exit triggered %s.%s",
1534 JvmtiTrace::safe_get_thread_name(thread),
1535 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1536 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1537
1538 JvmtiThreadState *state = thread->jvmti_thread_state();
1539 if (state == NULL || !state->is_interp_only_mode()) {
1540 // for any thread that actually wants method exit, interp_only_mode is set
1541 return;
1542 }
1543
1544 // return a flag when a method terminates by throwing an exception
1545 // i.e. if an exception is thrown and it's not caught by the current method
1546 bool exception_exit = state->is_exception_detected() && !state->is_exception_caught();
1547
1548
1549 if (state->is_enabled(JVMTI_EVENT_METHOD_EXIT)) {
1550 Handle result;
1551 jvalue value;
1552 value.j = 0L;
1553
1554 // if the method hasn't been popped because of an exception then we populate
1555 // the return_value parameter for the callback. At this point we only have
1556 // the address of a "raw result" and we just call into the interpreter to
1557 // convert this into a jvalue.
1558 if (!exception_exit) {
1559 oop oop_result;
1560 BasicType type = current_frame.interpreter_frame_result(&oop_result, &value);
1561 if (type == T_OBJECT || type == T_ARRAY) {
1562 result = Handle(thread, oop_result);
1563 }
1564 }
1565
1566 JvmtiEnvThreadStateIterator it(state);
1567 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1568 if (ets->is_enabled(JVMTI_EVENT_METHOD_EXIT)) {
1569 EVT_TRACE(JVMTI_EVENT_METHOD_EXIT, ("[%s] Evt Method Exit sent %s.%s",
1570 JvmtiTrace::safe_get_thread_name(thread),
1571 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1572 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1573
1574 JvmtiEnv *env = ets->get_env();
1575 JvmtiMethodEventMark jem(thread, mh);
1576 if (result.not_null()) {
1577 value.l = JNIHandles::make_local(thread, result());
1578 }
1579 JvmtiJavaThreadEventTransition jet(thread);
1580 jvmtiEventMethodExit callback = env->callbacks()->MethodExit;
1581 if (callback != NULL) {
1582 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1583 jem.jni_methodID(), exception_exit, value);
1584 }
1585 }
1586 }
1587 }
1588
1589 JvmtiEnvThreadStateIterator it(state);
1590 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1591 if (ets->has_frame_pops()) {
1592 int cur_frame_number = state->cur_stack_depth();
1593
1594 if (ets->is_frame_pop(cur_frame_number)) {
1595 // we have a NotifyFramePop entry for this frame.
1596 // now check that this env/thread wants this event
1597 if (ets->is_enabled(JVMTI_EVENT_FRAME_POP)) {
1598 EVT_TRACE(JVMTI_EVENT_FRAME_POP, ("[%s] Evt Frame Pop sent %s.%s",
1599 JvmtiTrace::safe_get_thread_name(thread),
1600 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1601 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1602
1603 // we also need to issue a frame pop event for this frame
1604 JvmtiEnv *env = ets->get_env();
1605 JvmtiMethodEventMark jem(thread, mh);
1606 JvmtiJavaThreadEventTransition jet(thread);
1607 jvmtiEventFramePop callback = env->callbacks()->FramePop;
1608 if (callback != NULL) {
1609 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1610 jem.jni_methodID(), exception_exit);
1611 }
1612 }
1613 // remove the frame's entry
1614 ets->clear_frame_pop(cur_frame_number);
1615 }
1616 }
1617 }
1618
1619 state->decr_cur_stack_depth();
1620 }
1621
1622
1623 // Todo: inline this for optimization
1624 void JvmtiExport::post_single_step(JavaThread *thread, Method* method, address location) {
1625 HandleMark hm(thread);
1626 methodHandle mh(thread, method);
1627
1628 JvmtiThreadState *state = thread->jvmti_thread_state();
1629 if (state == NULL) {
1630 return;
1631 }
1632 JvmtiEnvThreadStateIterator it(state);
1633 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1634 ets->compare_and_set_current_location(mh(), location, JVMTI_EVENT_SINGLE_STEP);
1635 if (!ets->single_stepping_posted() && ets->is_enabled(JVMTI_EVENT_SINGLE_STEP)) {
1636 EVT_TRACE(JVMTI_EVENT_SINGLE_STEP, ("[%s] Evt Single Step sent %s.%s @ " INTX_FORMAT,
1637 JvmtiTrace::safe_get_thread_name(thread),
1638 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1639 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1640 location - mh()->code_base() ));
1641
1642 JvmtiEnv *env = ets->get_env();
1643 JvmtiLocationEventMark jem(thread, mh, location);
1644 JvmtiJavaThreadEventTransition jet(thread);
1645 jvmtiEventSingleStep callback = env->callbacks()->SingleStep;
1646 if (callback != NULL) {
1647 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1648 jem.jni_methodID(), jem.location());
1649 }
1650
1651 ets->set_single_stepping_posted();
1652 }
1653 }
1654 }
1655
1656 void JvmtiExport::post_exception_throw(JavaThread *thread, Method* method, address location, oop exception) {
1657 HandleMark hm(thread);
1658 methodHandle mh(thread, method);
1659 Handle exception_handle(thread, exception);
1660
1661 JvmtiThreadState *state = thread->jvmti_thread_state();
1662 if (state == NULL) {
1663 return;
1664 }
1665
1666 EVT_TRIG_TRACE(JVMTI_EVENT_EXCEPTION, ("[%s] Trg Exception thrown triggered",
1667 JvmtiTrace::safe_get_thread_name(thread)));
1668 if (!state->is_exception_detected()) {
1669 state->set_exception_detected();
1670 JvmtiEnvThreadStateIterator it(state);
1671 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1672 if (ets->is_enabled(JVMTI_EVENT_EXCEPTION) && (exception != NULL)) {
1673
1674 EVT_TRACE(JVMTI_EVENT_EXCEPTION,
1675 ("[%s] Evt Exception thrown sent %s.%s @ " INTX_FORMAT,
1676 JvmtiTrace::safe_get_thread_name(thread),
1677 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1678 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1679 location - mh()->code_base() ));
1680
1681 JvmtiEnv *env = ets->get_env();
1682 JvmtiExceptionEventMark jem(thread, mh, location, exception_handle);
1683
1684 // It's okay to clear these exceptions here because we duplicate
1685 // this lookup in InterpreterRuntime::exception_handler_for_exception.
1686 EXCEPTION_MARK;
1687
1688 bool should_repeat;
1689 vframeStream st(thread);
1690 assert(!st.at_end(), "cannot be at end");
1691 Method* current_method = NULL;
1692 // A GC may occur during the Method::fast_exception_handler_bci_for()
1693 // call below if it needs to load the constraint class. Using a
1694 // methodHandle to keep the 'current_method' from being deallocated
1695 // if GC happens.
1696 methodHandle current_mh = methodHandle(thread, current_method);
1697 int current_bci = -1;
1698 do {
1699 current_method = st.method();
1700 current_mh = methodHandle(thread, current_method);
1701 current_bci = st.bci();
1702 do {
1703 should_repeat = false;
1704 Klass* eh_klass = exception_handle()->klass();
1705 current_bci = Method::fast_exception_handler_bci_for(
1706 current_mh, eh_klass, current_bci, THREAD);
1707 if (HAS_PENDING_EXCEPTION) {
1708 exception_handle = Handle(thread, PENDING_EXCEPTION);
1709 CLEAR_PENDING_EXCEPTION;
1710 should_repeat = true;
1711 }
1712 } while (should_repeat && (current_bci != -1));
1713 st.next();
1714 } while ((current_bci < 0) && (!st.at_end()));
1715
1716 jmethodID catch_jmethodID;
1717 if (current_bci < 0) {
1718 catch_jmethodID = 0;
1719 current_bci = 0;
1720 } else {
1721 catch_jmethodID = jem.to_jmethodID(current_mh);
1722 }
1723
1724 JvmtiJavaThreadEventTransition jet(thread);
1725 jvmtiEventException callback = env->callbacks()->Exception;
1726 if (callback != NULL) {
1727 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1728 jem.jni_methodID(), jem.location(),
1729 jem.exception(),
1730 catch_jmethodID, current_bci);
1731 }
1732 }
1733 }
1734 }
1735
1736 // frames may get popped because of this throw, be safe - invalidate cached depth
1737 state->invalidate_cur_stack_depth();
1738 }
1739
1740
1741 void JvmtiExport::notice_unwind_due_to_exception(JavaThread *thread, Method* method, address location, oop exception, bool in_handler_frame) {
1742 HandleMark hm(thread);
1743 methodHandle mh(thread, method);
1744 Handle exception_handle(thread, exception);
1745
1746 JvmtiThreadState *state = thread->jvmti_thread_state();
1747 if (state == NULL) {
1748 return;
1749 }
1750 EVT_TRIG_TRACE(JVMTI_EVENT_EXCEPTION_CATCH,
1751 ("[%s] Trg unwind_due_to_exception triggered %s.%s @ %s" INTX_FORMAT " - %s",
1752 JvmtiTrace::safe_get_thread_name(thread),
1753 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1754 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1755 location==0? "no location:" : "",
1756 location==0? 0 : location - mh()->code_base(),
1757 in_handler_frame? "in handler frame" : "not handler frame" ));
1758
1759 if (state->is_exception_detected()) {
1760
1761 state->invalidate_cur_stack_depth();
1762 if (!in_handler_frame) {
1763 // Not in exception handler.
1764 if(state->is_interp_only_mode()) {
1765 // method exit and frame pop events are posted only in interp mode.
1766 // When these events are enabled code should be in running in interp mode.
1767 JvmtiExport::post_method_exit(thread, method, thread->last_frame());
1768 // The cached cur_stack_depth might have changed from the
1769 // operations of frame pop or method exit. We are not 100% sure
1770 // the cached cur_stack_depth is still valid depth so invalidate
1771 // it.
1772 state->invalidate_cur_stack_depth();
1773 }
1774 } else {
1775 // In exception handler frame. Report exception catch.
1776 assert(location != NULL, "must be a known location");
1777 // Update cur_stack_depth - the frames above the current frame
1778 // have been unwound due to this exception:
1779 assert(!state->is_exception_caught(), "exception must not be caught yet.");
1780 state->set_exception_caught();
1781
1782 JvmtiEnvThreadStateIterator it(state);
1783 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1784 if (ets->is_enabled(JVMTI_EVENT_EXCEPTION_CATCH) && (exception_handle() != NULL)) {
1785 EVT_TRACE(JVMTI_EVENT_EXCEPTION_CATCH,
1786 ("[%s] Evt ExceptionCatch sent %s.%s @ " INTX_FORMAT,
1787 JvmtiTrace::safe_get_thread_name(thread),
1788 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1789 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1790 location - mh()->code_base() ));
1791
1792 JvmtiEnv *env = ets->get_env();
1793 JvmtiExceptionEventMark jem(thread, mh, location, exception_handle);
1794 JvmtiJavaThreadEventTransition jet(thread);
1795 jvmtiEventExceptionCatch callback = env->callbacks()->ExceptionCatch;
1796 if (callback != NULL) {
1797 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1798 jem.jni_methodID(), jem.location(),
1799 jem.exception());
1800 }
1801 }
1802 }
1803 }
1804 }
1805 }
1806
1807 oop JvmtiExport::jni_GetField_probe(JavaThread *thread, jobject jobj, oop obj,
1808 Klass* klass, jfieldID fieldID, bool is_static) {
1809 if (*((int *)get_field_access_count_addr()) > 0 && thread->has_last_Java_frame()) {
1810 // At least one field access watch is set so we have more work
1811 // to do. This wrapper is used by entry points that allow us
1812 // to create handles in post_field_access_by_jni().
1813 post_field_access_by_jni(thread, obj, klass, fieldID, is_static);
1814 // event posting can block so refetch oop if we were passed a jobj
1815 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj);
1816 }
1817 return obj;
1818 }
1819
1820 oop JvmtiExport::jni_GetField_probe_nh(JavaThread *thread, jobject jobj, oop obj,
1821 Klass* klass, jfieldID fieldID, bool is_static) {
1822 if (*((int *)get_field_access_count_addr()) > 0 && thread->has_last_Java_frame()) {
1823 // At least one field access watch is set so we have more work
1824 // to do. This wrapper is used by "quick" entry points that don't
1825 // allow us to create handles in post_field_access_by_jni(). We
1826 // override that with a ResetNoHandleMark.
1827 ResetNoHandleMark rnhm;
1828 post_field_access_by_jni(thread, obj, klass, fieldID, is_static);
1829 // event posting can block so refetch oop if we were passed a jobj
1830 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj);
1831 }
1832 return obj;
1833 }
1834
1835 void JvmtiExport::post_field_access_by_jni(JavaThread *thread, oop obj,
1836 Klass* klass, jfieldID fieldID, bool is_static) {
1837 // We must be called with a Java context in order to provide reasonable
1838 // values for the klazz, method, and location fields. The callers of this
1839 // function don't make the call unless there is a Java context.
1840 assert(thread->has_last_Java_frame(), "must be called with a Java context");
1841
1842 ResourceMark rm;
1843 fieldDescriptor fd;
1844 // if get_field_descriptor finds fieldID to be invalid, then we just bail
1845 bool valid_fieldID = JvmtiEnv::get_field_descriptor(klass, fieldID, &fd);
1846 assert(valid_fieldID == true,"post_field_access_by_jni called with invalid fieldID");
1847 if (!valid_fieldID) return;
1848 // field accesses are not watched so bail
1849 if (!fd.is_field_access_watched()) return;
1850
1851 HandleMark hm(thread);
1852 Handle h_obj;
1853 if (!is_static) {
1854 // non-static field accessors have an object, but we need a handle
1855 assert(obj != NULL, "non-static needs an object");
1856 h_obj = Handle(thread, obj);
1857 }
1858 post_field_access(thread,
1859 thread->last_frame().interpreter_frame_method(),
1860 thread->last_frame().interpreter_frame_bcp(),
1861 klass, h_obj, fieldID);
1862 }
1863
1864 void JvmtiExport::post_field_access(JavaThread *thread, Method* method,
1865 address location, Klass* field_klass, Handle object, jfieldID field) {
1866
1867 HandleMark hm(thread);
1868 methodHandle mh(thread, method);
1869
1870 JvmtiThreadState *state = thread->jvmti_thread_state();
1871 if (state == NULL) {
1872 return;
1873 }
1874 EVT_TRIG_TRACE(JVMTI_EVENT_FIELD_ACCESS, ("[%s] Trg Field Access event triggered",
1875 JvmtiTrace::safe_get_thread_name(thread)));
1876 JvmtiEnvThreadStateIterator it(state);
1877 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1878 if (ets->is_enabled(JVMTI_EVENT_FIELD_ACCESS)) {
1879 EVT_TRACE(JVMTI_EVENT_FIELD_ACCESS, ("[%s] Evt Field Access event sent %s.%s @ " INTX_FORMAT,
1880 JvmtiTrace::safe_get_thread_name(thread),
1881 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1882 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1883 location - mh()->code_base() ));
1884
1885 JvmtiEnv *env = ets->get_env();
1886 JvmtiLocationEventMark jem(thread, mh, location);
1887 jclass field_jclass = jem.to_jclass(field_klass);
1888 jobject field_jobject = jem.to_jobject(object());
1889 JvmtiJavaThreadEventTransition jet(thread);
1890 jvmtiEventFieldAccess callback = env->callbacks()->FieldAccess;
1891 if (callback != NULL) {
1892 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1893 jem.jni_methodID(), jem.location(),
1894 field_jclass, field_jobject, field);
1895 }
1896 }
1897 }
1898 }
1899
1900 oop JvmtiExport::jni_SetField_probe(JavaThread *thread, jobject jobj, oop obj,
1901 Klass* klass, jfieldID fieldID, bool is_static,
1902 char sig_type, jvalue *value) {
1903 if (*((int *)get_field_modification_count_addr()) > 0 && thread->has_last_Java_frame()) {
1904 // At least one field modification watch is set so we have more work
1905 // to do. This wrapper is used by entry points that allow us
1906 // to create handles in post_field_modification_by_jni().
1907 post_field_modification_by_jni(thread, obj, klass, fieldID, is_static, sig_type, value);
1908 // event posting can block so refetch oop if we were passed a jobj
1909 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj);
1910 }
1911 return obj;
1912 }
1913
1914 oop JvmtiExport::jni_SetField_probe_nh(JavaThread *thread, jobject jobj, oop obj,
1915 Klass* klass, jfieldID fieldID, bool is_static,
1916 char sig_type, jvalue *value) {
1917 if (*((int *)get_field_modification_count_addr()) > 0 && thread->has_last_Java_frame()) {
1918 // At least one field modification watch is set so we have more work
1919 // to do. This wrapper is used by "quick" entry points that don't
1920 // allow us to create handles in post_field_modification_by_jni(). We
1921 // override that with a ResetNoHandleMark.
1922 ResetNoHandleMark rnhm;
1923 post_field_modification_by_jni(thread, obj, klass, fieldID, is_static, sig_type, value);
1924 // event posting can block so refetch oop if we were passed a jobj
1925 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj);
1926 }
1927 return obj;
1928 }
1929
1930 void JvmtiExport::post_field_modification_by_jni(JavaThread *thread, oop obj,
1931 Klass* klass, jfieldID fieldID, bool is_static,
1932 char sig_type, jvalue *value) {
1933 // We must be called with a Java context in order to provide reasonable
1934 // values for the klazz, method, and location fields. The callers of this
1935 // function don't make the call unless there is a Java context.
1936 assert(thread->has_last_Java_frame(), "must be called with Java context");
1937
1938 ResourceMark rm;
1939 fieldDescriptor fd;
1940 // if get_field_descriptor finds fieldID to be invalid, then we just bail
1941 bool valid_fieldID = JvmtiEnv::get_field_descriptor(klass, fieldID, &fd);
1942 assert(valid_fieldID == true,"post_field_modification_by_jni called with invalid fieldID");
1943 if (!valid_fieldID) return;
1944 // field modifications are not watched so bail
1945 if (!fd.is_field_modification_watched()) return;
1946
1947 HandleMark hm(thread);
1948
1949 Handle h_obj;
1950 if (!is_static) {
1951 // non-static field accessors have an object, but we need a handle
1952 assert(obj != NULL, "non-static needs an object");
1953 h_obj = Handle(thread, obj);
1954 }
1955 post_field_modification(thread,
1956 thread->last_frame().interpreter_frame_method(),
1957 thread->last_frame().interpreter_frame_bcp(),
1958 klass, h_obj, fieldID, sig_type, value);
1959 }
1960
1961 void JvmtiExport::post_raw_field_modification(JavaThread *thread, Method* method,
1962 address location, Klass* field_klass, Handle object, jfieldID field,
1963 char sig_type, jvalue *value) {
1964
1965 if (sig_type == 'I' || sig_type == 'Z' || sig_type == 'B' || sig_type == 'C' || sig_type == 'S') {
1966 // 'I' instructions are used for byte, char, short and int.
1967 // determine which it really is, and convert
1968 fieldDescriptor fd;
1969 bool found = JvmtiEnv::get_field_descriptor(field_klass, field, &fd);
1970 // should be found (if not, leave as is)
1971 if (found) {
1972 jint ival = value->i;
1973 // convert value from int to appropriate type
1974 switch (fd.field_type()) {
1975 case T_BOOLEAN:
1976 sig_type = 'Z';
1977 value->i = 0; // clear it
1978 value->z = (jboolean)ival;
1979 break;
1980 case T_BYTE:
1981 sig_type = 'B';
1982 value->i = 0; // clear it
1983 value->b = (jbyte)ival;
1984 break;
1985 case T_CHAR:
1986 sig_type = 'C';
1987 value->i = 0; // clear it
1988 value->c = (jchar)ival;
1989 break;
1990 case T_SHORT:
1991 sig_type = 'S';
1992 value->i = 0; // clear it
1993 value->s = (jshort)ival;
1994 break;
1995 case T_INT:
1996 // nothing to do
1997 break;
1998 default:
1999 // this is an integer instruction, should be one of above
2000 ShouldNotReachHere();
2001 break;
2002 }
2003 }
2004 }
2005
2006 assert(sig_type != '[', "array should have sig_type == 'L'");
2007 bool handle_created = false;
2008
2009 // convert oop to JNI handle.
2010 if (sig_type == 'L') {
2011 handle_created = true;
2012 value->l = (jobject)JNIHandles::make_local(thread, (oop)value->l);
2013 }
2014
2015 post_field_modification(thread, method, location, field_klass, object, field, sig_type, value);
2016
2017 // Destroy the JNI handle allocated above.
2018 if (handle_created) {
2019 JNIHandles::destroy_local(value->l);
2020 }
2021 }
2022
2023 void JvmtiExport::post_field_modification(JavaThread *thread, Method* method,
2024 address location, Klass* field_klass, Handle object, jfieldID field,
2025 char sig_type, jvalue *value_ptr) {
2026
2027 HandleMark hm(thread);
2028 methodHandle mh(thread, method);
2029
2030 JvmtiThreadState *state = thread->jvmti_thread_state();
2031 if (state == NULL) {
2032 return;
2033 }
2034 EVT_TRIG_TRACE(JVMTI_EVENT_FIELD_MODIFICATION,
2035 ("[%s] Trg Field Modification event triggered",
2036 JvmtiTrace::safe_get_thread_name(thread)));
2037
2038 JvmtiEnvThreadStateIterator it(state);
2039 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
2040 if (ets->is_enabled(JVMTI_EVENT_FIELD_MODIFICATION)) {
2041 EVT_TRACE(JVMTI_EVENT_FIELD_MODIFICATION,
2042 ("[%s] Evt Field Modification event sent %s.%s @ " INTX_FORMAT,
2043 JvmtiTrace::safe_get_thread_name(thread),
2044 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
2045 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
2046 location - mh()->code_base() ));
2047
2048 JvmtiEnv *env = ets->get_env();
2049 JvmtiLocationEventMark jem(thread, mh, location);
2050 jclass field_jclass = jem.to_jclass(field_klass);
2051 jobject field_jobject = jem.to_jobject(object());
2052 JvmtiJavaThreadEventTransition jet(thread);
2053 jvmtiEventFieldModification callback = env->callbacks()->FieldModification;
2054 if (callback != NULL) {
2055 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
2056 jem.jni_methodID(), jem.location(),
2057 field_jclass, field_jobject, field, sig_type, *value_ptr);
2058 }
2059 }
2060 }
2061 }
2062
2063 void JvmtiExport::post_native_method_bind(Method* method, address* function_ptr) {
2064 JavaThread* thread = JavaThread::current();
2065 assert(thread->thread_state() == _thread_in_vm, "must be in vm state");
2066
2067 HandleMark hm(thread);
2068 methodHandle mh(thread, method);
2069
2070 EVT_TRIG_TRACE(JVMTI_EVENT_NATIVE_METHOD_BIND, ("[%s] Trg Native Method Bind event triggered",
2071 JvmtiTrace::safe_get_thread_name(thread)));
2072
2073 if (JvmtiEventController::is_enabled(JVMTI_EVENT_NATIVE_METHOD_BIND)) {
2074 JvmtiEnvIterator it;
2075 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
2076 if (env->is_enabled(JVMTI_EVENT_NATIVE_METHOD_BIND)) {
2077 EVT_TRACE(JVMTI_EVENT_NATIVE_METHOD_BIND, ("[%s] Evt Native Method Bind event sent",
2078 JvmtiTrace::safe_get_thread_name(thread) ));
2079
2080 JvmtiMethodEventMark jem(thread, mh);
2081 JvmtiJavaThreadEventTransition jet(thread);
2082 JNIEnv* jni_env = (env->phase() == JVMTI_PHASE_PRIMORDIAL) ? NULL : jem.jni_env();
2083 jvmtiEventNativeMethodBind callback = env->callbacks()->NativeMethodBind;
2084 if (callback != NULL) {
2085 (*callback)(env->jvmti_external(), jni_env, jem.jni_thread(),
2086 jem.jni_methodID(), (void*)(*function_ptr), (void**)function_ptr);
2087 }
2088 }
2089 }
2090 }
2091 }
2092
2093 // Returns a record containing inlining information for the given nmethod
2094 jvmtiCompiledMethodLoadInlineRecord* create_inline_record(nmethod* nm) {
2095 jint numstackframes = 0;
2096 jvmtiCompiledMethodLoadInlineRecord* record = (jvmtiCompiledMethodLoadInlineRecord*)NEW_RESOURCE_OBJ(jvmtiCompiledMethodLoadInlineRecord);
2097 record->header.kind = JVMTI_CMLR_INLINE_INFO;
2098 record->header.next = NULL;
2099 record->header.majorinfoversion = JVMTI_CMLR_MAJOR_VERSION_1;
2100 record->header.minorinfoversion = JVMTI_CMLR_MINOR_VERSION_0;
2101 record->numpcs = 0;
2102 for(PcDesc* p = nm->scopes_pcs_begin(); p < nm->scopes_pcs_end(); p++) {
2103 if(p->scope_decode_offset() == DebugInformationRecorder::serialized_null) continue;
2104 record->numpcs++;
2105 }
2106 record->pcinfo = (PCStackInfo*)(NEW_RESOURCE_ARRAY(PCStackInfo, record->numpcs));
2107 int scope = 0;
2108 for(PcDesc* p = nm->scopes_pcs_begin(); p < nm->scopes_pcs_end(); p++) {
2109 if(p->scope_decode_offset() == DebugInformationRecorder::serialized_null) continue;
2110 void* pc_address = (void*)p->real_pc(nm);
2111 assert(pc_address != NULL, "pc_address must be non-null");
2112 record->pcinfo[scope].pc = pc_address;
2113 numstackframes=0;
2114 for(ScopeDesc* sd = nm->scope_desc_at(p->real_pc(nm));sd != NULL;sd = sd->sender()) {
2115 numstackframes++;
2116 }
2117 assert(numstackframes != 0, "numstackframes must be nonzero.");
2118 record->pcinfo[scope].methods = (jmethodID *)NEW_RESOURCE_ARRAY(jmethodID, numstackframes);
2119 record->pcinfo[scope].bcis = (jint *)NEW_RESOURCE_ARRAY(jint, numstackframes);
2120 record->pcinfo[scope].numstackframes = numstackframes;
2121 int stackframe = 0;
2122 for(ScopeDesc* sd = nm->scope_desc_at(p->real_pc(nm));sd != NULL;sd = sd->sender()) {
2123 // 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()
2124 assert(sd->method() != NULL, "sd->method() cannot be null.");
2125 record->pcinfo[scope].methods[stackframe] = sd->method()->jmethod_id();
2126 record->pcinfo[scope].bcis[stackframe] = sd->bci();
2127 stackframe++;
2128 }
2129 scope++;
2130 }
2131 return record;
2132 }
2133
2134 void JvmtiExport::post_compiled_method_load(nmethod *nm) {
2135 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) {
2136 return;
2137 }
2138 JavaThread* thread = JavaThread::current();
2139
2140 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
2141 ("[%s] method compile load event triggered",
2142 JvmtiTrace::safe_get_thread_name(thread)));
2143
2144 JvmtiEnvIterator it;
2145 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
2146 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_LOAD)) {
2147 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) {
2148 continue;
2149 }
2150 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
2151 ("[%s] class compile method load event sent %s.%s ",
2152 JvmtiTrace::safe_get_thread_name(thread),
2153 (nm->method() == NULL) ? "NULL" : nm->method()->klass_name()->as_C_string(),
2154 (nm->method() == NULL) ? "NULL" : nm->method()->name()->as_C_string()));
2155 ResourceMark rm(thread);
2156 HandleMark hm(thread);
2157
2158 // Add inlining information
2159 jvmtiCompiledMethodLoadInlineRecord* inlinerecord = create_inline_record(nm);
2160 // Pass inlining information through the void pointer
2161 JvmtiCompiledMethodLoadEventMark jem(thread, nm, inlinerecord);
2162 JvmtiJavaThreadEventTransition jet(thread);
2163 jvmtiEventCompiledMethodLoad callback = env->callbacks()->CompiledMethodLoad;
2164 if (callback != NULL) {
2165 (*callback)(env->jvmti_external(), jem.jni_methodID(),
2166 jem.code_size(), jem.code_data(), jem.map_length(),
2167 jem.map(), jem.compile_info());
2168 }
2169 }
2170 }
2171 }
2172
2173
2174 // post a COMPILED_METHOD_LOAD event for a given environment
2175 void JvmtiExport::post_compiled_method_load(JvmtiEnv* env, const jmethodID method, const jint length,
2176 const void *code_begin, const jint map_length,
2177 const jvmtiAddrLocationMap* map)
2178 {
2179 if (env->phase() <= JVMTI_PHASE_PRIMORDIAL) {
2180 return;
2181 }
2182 JavaThread* thread = JavaThread::current();
2183 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
2184 ("[%s] method compile load event triggered (by GenerateEvents)",
2185 JvmtiTrace::safe_get_thread_name(thread)));
2186 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_LOAD)) {
2187
2188 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
2189 ("[%s] class compile method load event sent (by GenerateEvents), jmethodID=" PTR_FORMAT,
2190 JvmtiTrace::safe_get_thread_name(thread), p2i(method)));
2191
2192 JvmtiEventMark jem(thread);
2193 JvmtiJavaThreadEventTransition jet(thread);
2194 jvmtiEventCompiledMethodLoad callback = env->callbacks()->CompiledMethodLoad;
2195 if (callback != NULL) {
2196 (*callback)(env->jvmti_external(), method,
2197 length, code_begin, map_length,
2198 map, NULL);
2199 }
2200 }
2201 }
2202
2203 void JvmtiExport::post_dynamic_code_generated_internal(const char *name, const void *code_begin, const void *code_end) {
2204 assert(name != NULL && name[0] != '\0', "sanity check");
2205
2206 JavaThread* thread = JavaThread::current();
2207 // In theory everyone coming thru here is in_vm but we need to be certain
2208 // because a callee will do a vm->native transition
2209 ThreadInVMfromUnknown __tiv;
2210
2211 EVT_TRIG_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED,
2212 ("[%s] method dynamic code generated event triggered",
2213 JvmtiTrace::safe_get_thread_name(thread)));
2214 JvmtiEnvIterator it;
2215 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
2216 if (env->is_enabled(JVMTI_EVENT_DYNAMIC_CODE_GENERATED)) {
2217 EVT_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED,
2218 ("[%s] dynamic code generated event sent for %s",
2219 JvmtiTrace::safe_get_thread_name(thread), name));
2220 JvmtiEventMark jem(thread);
2221 JvmtiJavaThreadEventTransition jet(thread);
2222 jint length = (jint)pointer_delta(code_end, code_begin, sizeof(char));
2223 jvmtiEventDynamicCodeGenerated callback = env->callbacks()->DynamicCodeGenerated;
2224 if (callback != NULL) {
2225 (*callback)(env->jvmti_external(), name, (void*)code_begin, length);
2226 }
2227 }
2228 }
2229 }
2230
2231 void JvmtiExport::post_dynamic_code_generated(const char *name, const void *code_begin, const void *code_end) {
2232 jvmtiPhase phase = JvmtiEnv::get_phase();
2233 if (phase == JVMTI_PHASE_PRIMORDIAL || phase == JVMTI_PHASE_START) {
2234 post_dynamic_code_generated_internal(name, code_begin, code_end);
2235 } else {
2236 // It may not be safe to post the event from this thread. Defer all
2237 // postings to the service thread so that it can perform them in a safe
2238 // context and in-order.
2239 MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag);
2240 JvmtiDeferredEvent event = JvmtiDeferredEvent::dynamic_code_generated_event(
2241 name, code_begin, code_end);
2242 JvmtiDeferredEventQueue::enqueue(event);
2243 }
2244 }
2245
2246
2247 // post a DYNAMIC_CODE_GENERATED event for a given environment
2248 // used by GenerateEvents
2249 void JvmtiExport::post_dynamic_code_generated(JvmtiEnv* env, const char *name,
2250 const void *code_begin, const void *code_end)
2251 {
2252 JavaThread* thread = JavaThread::current();
2253 EVT_TRIG_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED,
2254 ("[%s] dynamic code generated event triggered (by GenerateEvents)",
2255 JvmtiTrace::safe_get_thread_name(thread)));
2256 if (env->is_enabled(JVMTI_EVENT_DYNAMIC_CODE_GENERATED)) {
2257 EVT_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED,
2258 ("[%s] dynamic code generated event sent for %s",
2259 JvmtiTrace::safe_get_thread_name(thread), name));
2260 JvmtiEventMark jem(thread);
2261 JvmtiJavaThreadEventTransition jet(thread);
2262 jint length = (jint)pointer_delta(code_end, code_begin, sizeof(char));
2263 jvmtiEventDynamicCodeGenerated callback = env->callbacks()->DynamicCodeGenerated;
2264 if (callback != NULL) {
2265 (*callback)(env->jvmti_external(), name, (void*)code_begin, length);
2266 }
2267 }
2268 }
2269
2270 // post a DynamicCodeGenerated event while holding locks in the VM.
2271 void JvmtiExport::post_dynamic_code_generated_while_holding_locks(const char* name,
2272 address code_begin, address code_end)
2273 {
2274 // register the stub with the current dynamic code event collector
2275 JvmtiThreadState* state = JvmtiThreadState::state_for(JavaThread::current());
2276 // state can only be NULL if the current thread is exiting which
2277 // should not happen since we're trying to post an event
2278 guarantee(state != NULL, "attempt to register stub via an exiting thread");
2279 JvmtiDynamicCodeEventCollector* collector = state->get_dynamic_code_event_collector();
2280 guarantee(collector != NULL, "attempt to register stub without event collector");
2281 collector->register_stub(name, code_begin, code_end);
2282 }
2283
2284 // Collect all the vm internally allocated objects which are visible to java world
2285 void JvmtiExport::record_vm_internal_object_allocation(oop obj) {
2286 Thread* thread = Thread::current_or_null();
2287 if (thread != NULL && thread->is_Java_thread()) {
2288 // Can not take safepoint here.
2289 NoSafepointVerifier no_sfpt;
2290 // Can not take safepoint here so can not use state_for to get
2291 // jvmti thread state.
2292 JvmtiThreadState *state = ((JavaThread*)thread)->jvmti_thread_state();
2293 if (state != NULL) {
2294 // state is non NULL when VMObjectAllocEventCollector is enabled.
2295 JvmtiVMObjectAllocEventCollector *collector;
2296 collector = state->get_vm_object_alloc_event_collector();
2297 if (collector != NULL && collector->is_enabled()) {
2298 // Don't record classes as these will be notified via the ClassLoad
2299 // event.
2300 if (obj->klass() != SystemDictionary::Class_klass()) {
2301 collector->record_allocation(obj);
2302 }
2303 }
2304 }
2305 }
2306 }
2307
2308 // Collect all the sampled allocated objects.
2309 void JvmtiExport::record_sampled_internal_object_allocation(oop obj) {
2310 Thread* thread = Thread::current_or_null();
2311 if (thread != NULL && thread->is_Java_thread()) {
2312 // Can not take safepoint here.
2313 NoSafepointVerifier no_sfpt;
2314 // Can not take safepoint here so can not use state_for to get
2315 // jvmti thread state.
2316 JvmtiThreadState *state = ((JavaThread*)thread)->jvmti_thread_state();
2317 if (state != NULL) {
2318 // state is non NULL when SampledObjectAllocEventCollector is enabled.
2319 JvmtiSampledObjectAllocEventCollector *collector;
2320 collector = state->get_sampled_object_alloc_event_collector();
2321
2322 if (collector != NULL && collector->is_enabled()) {
2323 collector->record_allocation(obj);
2324 }
2325 }
2326 }
2327 }
2328
2329 void JvmtiExport::post_garbage_collection_finish() {
2330 Thread *thread = Thread::current(); // this event is posted from VM-Thread.
2331 EVT_TRIG_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH,
2332 ("[%s] garbage collection finish event triggered",
2333 JvmtiTrace::safe_get_thread_name(thread)));
2334 JvmtiEnvIterator it;
2335 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
2336 if (env->is_enabled(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH)) {
2337 EVT_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH,
2338 ("[%s] garbage collection finish event sent",
2339 JvmtiTrace::safe_get_thread_name(thread)));
2340 JvmtiThreadEventTransition jet(thread);
2341 // JNIEnv is NULL here because this event is posted from VM Thread
2342 jvmtiEventGarbageCollectionFinish callback = env->callbacks()->GarbageCollectionFinish;
2343 if (callback != NULL) {
2344 (*callback)(env->jvmti_external());
2345 }
2346 }
2347 }
2348 }
2349
2350 void JvmtiExport::post_garbage_collection_start() {
2351 Thread* thread = Thread::current(); // this event is posted from vm-thread.
2352 EVT_TRIG_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_START,
2353 ("[%s] garbage collection start event triggered",
2354 JvmtiTrace::safe_get_thread_name(thread)));
2355 JvmtiEnvIterator it;
2356 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
2357 if (env->is_enabled(JVMTI_EVENT_GARBAGE_COLLECTION_START)) {
2358 EVT_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_START,
2359 ("[%s] garbage collection start event sent",
2360 JvmtiTrace::safe_get_thread_name(thread)));
2361 JvmtiThreadEventTransition jet(thread);
2362 // JNIEnv is NULL here because this event is posted from VM Thread
2363 jvmtiEventGarbageCollectionStart callback = env->callbacks()->GarbageCollectionStart;
2364 if (callback != NULL) {
2365 (*callback)(env->jvmti_external());
2366 }
2367 }
2368 }
2369 }
2370
2371 void JvmtiExport::post_data_dump() {
2372 Thread *thread = Thread::current();
2373 EVT_TRIG_TRACE(JVMTI_EVENT_DATA_DUMP_REQUEST,
2374 ("[%s] data dump request event triggered",
2375 JvmtiTrace::safe_get_thread_name(thread)));
2376 JvmtiEnvIterator it;
2377 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
2378 if (env->is_enabled(JVMTI_EVENT_DATA_DUMP_REQUEST)) {
2379 EVT_TRACE(JVMTI_EVENT_DATA_DUMP_REQUEST,
2380 ("[%s] data dump request event sent",
2381 JvmtiTrace::safe_get_thread_name(thread)));
2382 JvmtiThreadEventTransition jet(thread);
2383 // JNIEnv is NULL here because this event is posted from VM Thread
2384 jvmtiEventDataDumpRequest callback = env->callbacks()->DataDumpRequest;
2385 if (callback != NULL) {
2386 (*callback)(env->jvmti_external());
2387 }
2388 }
2389 }
2390 }
2391
2392 void JvmtiExport::post_monitor_contended_enter(JavaThread *thread, ObjectMonitor *obj_mntr) {
2393 oop object = (oop)obj_mntr->object();
2394 JvmtiThreadState *state = thread->jvmti_thread_state();
2395 if (state == NULL) {
2396 return;
2397 }
2398
2399 HandleMark hm(thread);
2400 Handle h(thread, object);
2401
2402 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTER,
2403 ("[%s] montior contended enter event triggered",
2404 JvmtiTrace::safe_get_thread_name(thread)));
2405
2406 JvmtiEnvThreadStateIterator it(state);
2407 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
2408 if (ets->is_enabled(JVMTI_EVENT_MONITOR_CONTENDED_ENTER)) {
2409 EVT_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTER,
2410 ("[%s] monitor contended enter event sent",
2411 JvmtiTrace::safe_get_thread_name(thread)));
2412 JvmtiMonitorEventMark jem(thread, h());
2413 JvmtiEnv *env = ets->get_env();
2414 JvmtiThreadEventTransition jet(thread);
2415 jvmtiEventMonitorContendedEnter callback = env->callbacks()->MonitorContendedEnter;
2416 if (callback != NULL) {
2417 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_object());
2418 }
2419 }
2420 }
2421 }
2422
2423 void JvmtiExport::post_monitor_contended_entered(JavaThread *thread, ObjectMonitor *obj_mntr) {
2424 oop object = (oop)obj_mntr->object();
2425 JvmtiThreadState *state = thread->jvmti_thread_state();
2426 if (state == NULL) {
2427 return;
2428 }
2429
2430 HandleMark hm(thread);
2431 Handle h(thread, object);
2432
2433 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED,
2434 ("[%s] montior contended entered event triggered",
2435 JvmtiTrace::safe_get_thread_name(thread)));
2436
2437 JvmtiEnvThreadStateIterator it(state);
2438 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
2439 if (ets->is_enabled(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED)) {
2440 EVT_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED,
2441 ("[%s] monitor contended enter event sent",
2442 JvmtiTrace::safe_get_thread_name(thread)));
2443 JvmtiMonitorEventMark jem(thread, h());
2444 JvmtiEnv *env = ets->get_env();
2445 JvmtiThreadEventTransition jet(thread);
2446 jvmtiEventMonitorContendedEntered callback = env->callbacks()->MonitorContendedEntered;
2447 if (callback != NULL) {
2448 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_object());
2449 }
2450 }
2451 }
2452 }
2453
2454 void JvmtiExport::post_monitor_wait(JavaThread *thread, oop object,
2455 jlong timeout) {
2456 JvmtiThreadState *state = thread->jvmti_thread_state();
2457 if (state == NULL) {
2458 return;
2459 }
2460
2461 HandleMark hm(thread);
2462 Handle h(thread, object);
2463
2464 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_WAIT,
2465 ("[%s] montior wait event triggered",
2466 JvmtiTrace::safe_get_thread_name(thread)));
2467
2468 JvmtiEnvThreadStateIterator it(state);
2469 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
2470 if (ets->is_enabled(JVMTI_EVENT_MONITOR_WAIT)) {
2471 EVT_TRACE(JVMTI_EVENT_MONITOR_WAIT,
2472 ("[%s] monitor wait event sent",
2473 JvmtiTrace::safe_get_thread_name(thread)));
2474 JvmtiMonitorEventMark jem(thread, h());
2475 JvmtiEnv *env = ets->get_env();
2476 JvmtiThreadEventTransition jet(thread);
2477 jvmtiEventMonitorWait callback = env->callbacks()->MonitorWait;
2478 if (callback != NULL) {
2479 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
2480 jem.jni_object(), timeout);
2481 }
2482 }
2483 }
2484 }
2485
2486 void JvmtiExport::post_monitor_waited(JavaThread *thread, ObjectMonitor *obj_mntr, jboolean timed_out) {
2487 oop object = (oop)obj_mntr->object();
2488 JvmtiThreadState *state = thread->jvmti_thread_state();
2489 if (state == NULL) {
2490 return;
2491 }
2492
2493 HandleMark hm(thread);
2494 Handle h(thread, object);
2495
2496 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_WAITED,
2497 ("[%s] montior waited event triggered",
2498 JvmtiTrace::safe_get_thread_name(thread)));
2499
2500 JvmtiEnvThreadStateIterator it(state);
2501 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
2502 if (ets->is_enabled(JVMTI_EVENT_MONITOR_WAITED)) {
2503 EVT_TRACE(JVMTI_EVENT_MONITOR_WAITED,
2504 ("[%s] monitor waited event sent",
2505 JvmtiTrace::safe_get_thread_name(thread)));
2506 JvmtiMonitorEventMark jem(thread, h());
2507 JvmtiEnv *env = ets->get_env();
2508 JvmtiThreadEventTransition jet(thread);
2509 jvmtiEventMonitorWaited callback = env->callbacks()->MonitorWaited;
2510 if (callback != NULL) {
2511 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
2512 jem.jni_object(), timed_out);
2513 }
2514 }
2515 }
2516 }
2517
2518 void JvmtiExport::post_vm_object_alloc(JavaThread *thread, oop object) {
2519 EVT_TRIG_TRACE(JVMTI_EVENT_VM_OBJECT_ALLOC, ("[%s] Trg vm object alloc triggered",
2520 JvmtiTrace::safe_get_thread_name(thread)));
2521 if (object == NULL) {
2522 return;
2523 }
2524 HandleMark hm(thread);
2525 Handle h(thread, object);
2526 JvmtiEnvIterator it;
2527 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
2528 if (env->is_enabled(JVMTI_EVENT_VM_OBJECT_ALLOC)) {
2529 EVT_TRACE(JVMTI_EVENT_VM_OBJECT_ALLOC, ("[%s] Evt vmobject alloc sent %s",
2530 JvmtiTrace::safe_get_thread_name(thread),
2531 object==NULL? "NULL" : object->klass()->external_name()));
2532
2533 JvmtiObjectAllocEventMark jem(thread, h());
2534 JvmtiJavaThreadEventTransition jet(thread);
2535 jvmtiEventVMObjectAlloc callback = env->callbacks()->VMObjectAlloc;
2536 if (callback != NULL) {
2537 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
2538 jem.jni_jobject(), jem.jni_class(), jem.size());
2539 }
2540 }
2541 }
2542 }
2543
2544 void JvmtiExport::post_sampled_object_alloc(JavaThread *thread, oop object) {
2545 EVT_TRIG_TRACE(JVMTI_EVENT_SAMPLED_OBJECT_ALLOC,
2546 ("[%s] Trg sampled object alloc triggered",
2547 JvmtiTrace::safe_get_thread_name(thread)));
2548 if (object == NULL) {
2549 return;
2550 }
2551 HandleMark hm(thread);
2552 Handle h(thread, object);
2553 JvmtiEnvIterator it;
2554 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
2555 if (env->is_enabled(JVMTI_EVENT_SAMPLED_OBJECT_ALLOC)) {
2556 EVT_TRACE(JVMTI_EVENT_SAMPLED_OBJECT_ALLOC,
2557 ("[%s] Evt sampled object alloc sent %s",
2558 JvmtiTrace::safe_get_thread_name(thread),
2559 object == NULL ? "NULL" : object->klass()->external_name()));
2560
2561 JvmtiObjectAllocEventMark jem(thread, h());
2562 JvmtiJavaThreadEventTransition jet(thread);
2563 jvmtiEventSampledObjectAlloc callback = env->callbacks()->SampledObjectAlloc;
2564 if (callback != NULL) {
2565 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
2566 jem.jni_jobject(), jem.jni_class(), jem.size());
2567 }
2568 }
2569 }
2570 }
2571
2572 ////////////////////////////////////////////////////////////////////////////////////////////////
2573
2574 void JvmtiExport::cleanup_thread(JavaThread* thread) {
2575 assert(JavaThread::current() == thread, "thread is not current");
2576 MutexLocker mu(JvmtiThreadState_lock);
2577
2578 if (thread->jvmti_thread_state() != NULL) {
2579 // This has to happen after the thread state is removed, which is
2580 // why it is not in post_thread_end_event like its complement
2581 // Maybe both these functions should be rolled into the posts?
2582 JvmtiEventController::thread_ended(thread);
2583 }
2584 }
2585
2586 void JvmtiExport::clear_detected_exception(JavaThread* thread) {
2587 assert(JavaThread::current() == thread, "thread is not current");
2588
2589 JvmtiThreadState* state = thread->jvmti_thread_state();
2590 if (state != NULL) {
2591 state->clear_exception_state();
2592 }
2593 }
2594
2595 void JvmtiExport::oops_do(OopClosure* f) {
2596 JvmtiCurrentBreakpoints::oops_do(f);
2597 JvmtiObjectAllocEventCollector::oops_do_for_all_threads(f);
2598 }
2599
2600 void JvmtiExport::weak_oops_do(BoolObjectClosure* is_alive, OopClosure* f) {
2601 JvmtiTagMap::weak_oops_do(is_alive, f);
2602 }
2603
2604 void JvmtiExport::gc_epilogue() {
2605 JvmtiCurrentBreakpoints::gc_epilogue();
2606 }
2607
2608 // Onload raw monitor transition.
2609 void JvmtiExport::transition_pending_onload_raw_monitors() {
2610 JvmtiPendingMonitors::transition_raw_monitors();
2611 }
2612
2613 ////////////////////////////////////////////////////////////////////////////////////////////////
2614 #if INCLUDE_SERVICES
2615 // Attach is disabled if SERVICES is not included
2616
2617 // type for the Agent_OnAttach entry point
2618 extern "C" {
2619 typedef jint (JNICALL *OnAttachEntry_t)(JavaVM*, char *, void *);
2620 }
2621
2622 jint JvmtiExport::load_agent_library(const char *agent, const char *absParam,
2623 const char *options, outputStream* st) {
2624 char ebuf[1024] = {0};
2625 char buffer[JVM_MAXPATHLEN];
2626 void* library = NULL;
2627 jint result = JNI_ERR;
2628 const char *on_attach_symbols[] = AGENT_ONATTACH_SYMBOLS;
2629 size_t num_symbol_entries = ARRAY_SIZE(on_attach_symbols);
2630
2631 // The abs paramter should be "true" or "false"
2632 bool is_absolute_path = (absParam != NULL) && (strcmp(absParam,"true")==0);
2633
2634 // Initially marked as invalid. It will be set to valid if we can find the agent
2635 AgentLibrary *agent_lib = new AgentLibrary(agent, options, is_absolute_path, NULL);
2636
2637 // Check for statically linked in agent. If not found then if the path is
2638 // absolute we attempt to load the library. Otherwise we try to load it
2639 // from the standard dll directory.
2640
2641 if (!os::find_builtin_agent(agent_lib, on_attach_symbols, num_symbol_entries)) {
2642 if (is_absolute_path) {
2643 library = os::dll_load(agent, ebuf, sizeof ebuf);
2644 } else {
2645 // Try to load the agent from the standard dll directory
2646 if (os::dll_locate_lib(buffer, sizeof(buffer), Arguments::get_dll_dir(),
2647 agent)) {
2648 library = os::dll_load(buffer, ebuf, sizeof ebuf);
2649 }
2650 if (library == NULL) {
2651 // not found - try OS default library path
2652 if (os::dll_build_name(buffer, sizeof(buffer), agent)) {
2653 library = os::dll_load(buffer, ebuf, sizeof ebuf);
2654 }
2655 }
2656 }
2657 if (library != NULL) {
2658 agent_lib->set_os_lib(library);
2659 agent_lib->set_valid();
2660 }
2661 }
2662 // If the library was loaded then we attempt to invoke the Agent_OnAttach
2663 // function
2664 if (agent_lib->valid()) {
2665 // Lookup the Agent_OnAttach function
2666 OnAttachEntry_t on_attach_entry = NULL;
2667 on_attach_entry = CAST_TO_FN_PTR(OnAttachEntry_t,
2668 os::find_agent_function(agent_lib, false, on_attach_symbols, num_symbol_entries));
2669 if (on_attach_entry == NULL) {
2670 // Agent_OnAttach missing - unload library
2671 if (!agent_lib->is_static_lib()) {
2672 os::dll_unload(library);
2673 }
2674 st->print_cr("%s is not available in %s",
2675 on_attach_symbols[0], agent_lib->name());
2676 delete agent_lib;
2677 } else {
2678 // Invoke the Agent_OnAttach function
2679 JavaThread* THREAD = JavaThread::current();
2680 {
2681 extern struct JavaVM_ main_vm;
2682 JvmtiThreadEventMark jem(THREAD);
2683 JvmtiJavaThreadEventTransition jet(THREAD);
2684
2685 result = (*on_attach_entry)(&main_vm, (char*)options, NULL);
2686 }
2687
2688 // Agent_OnAttach may have used JNI
2689 if (HAS_PENDING_EXCEPTION) {
2690 CLEAR_PENDING_EXCEPTION;
2691 }
2692
2693 // If OnAttach returns JNI_OK then we add it to the list of
2694 // agent libraries so that we can call Agent_OnUnload later.
2695 if (result == JNI_OK) {
2696 Arguments::add_loaded_agent(agent_lib);
2697 } else {
2698 delete agent_lib;
2699 }
2700
2701 // Agent_OnAttach executed so completion status is JNI_OK
2702 st->print_cr("return code: %d", result);
2703 result = JNI_OK;
2704 }
2705 } else {
2706 st->print_cr("%s was not loaded.", agent);
2707 if (*ebuf != '\0') {
2708 st->print_cr("%s", ebuf);
2709 }
2710 }
2711 return result;
2712 }
2713
2714 #endif // INCLUDE_SERVICES
2715 ////////////////////////////////////////////////////////////////////////////////////////////////
2716
2717 // Setup current current thread for event collection.
2718 void JvmtiEventCollector::setup_jvmti_thread_state() {
2719 // set this event collector to be the current one.
2720 JvmtiThreadState* state = JvmtiThreadState::state_for(JavaThread::current());
2721 // state can only be NULL if the current thread is exiting which
2722 // should not happen since we're trying to configure for event collection
2723 guarantee(state != NULL, "exiting thread called setup_jvmti_thread_state");
2724 if (is_vm_object_alloc_event()) {
2725 JvmtiVMObjectAllocEventCollector *prev = state->get_vm_object_alloc_event_collector();
2726
2727 // If we have a previous collector and it is disabled, it means this allocation came from a
2728 // callback induced VM Object allocation, do not register this collector then.
2729 if (prev && !prev->is_enabled()) {
2730 return;
2731 }
2732 _prev = prev;
2733 state->set_vm_object_alloc_event_collector((JvmtiVMObjectAllocEventCollector *)this);
2734 } else if (is_dynamic_code_event()) {
2735 _prev = state->get_dynamic_code_event_collector();
2736 state->set_dynamic_code_event_collector((JvmtiDynamicCodeEventCollector *)this);
2737 } else if (is_sampled_object_alloc_event()) {
2738 JvmtiSampledObjectAllocEventCollector *prev = state->get_sampled_object_alloc_event_collector();
2739
2740 if (prev) {
2741 // JvmtiSampledObjectAllocEventCollector wants only one active collector
2742 // enabled. This allows to have a collector detect a user code requiring
2743 // a sample in the callback.
2744 return;
2745 }
2746 state->set_sampled_object_alloc_event_collector((JvmtiSampledObjectAllocEventCollector*) this);
2747 }
2748
2749 _unset_jvmti_thread_state = true;
2750 }
2751
2752 // Unset current event collection in this thread and reset it with previous
2753 // collector.
2754 void JvmtiEventCollector::unset_jvmti_thread_state() {
2755 if (!_unset_jvmti_thread_state) {
2756 return;
2757 }
2758
2759 JvmtiThreadState* state = JavaThread::current()->jvmti_thread_state();
2760 if (state != NULL) {
2761 // restore the previous event collector (if any)
2762 if (is_vm_object_alloc_event()) {
2763 if (state->get_vm_object_alloc_event_collector() == this) {
2764 state->set_vm_object_alloc_event_collector((JvmtiVMObjectAllocEventCollector *)_prev);
2765 } else {
2766 // this thread's jvmti state was created during the scope of
2767 // the event collector.
2768 }
2769 } else if (is_dynamic_code_event()) {
2770 if (state->get_dynamic_code_event_collector() == this) {
2771 state->set_dynamic_code_event_collector((JvmtiDynamicCodeEventCollector *)_prev);
2772 } else {
2773 // this thread's jvmti state was created during the scope of
2774 // the event collector.
2775 }
2776 } else if (is_sampled_object_alloc_event()) {
2777 if (state->get_sampled_object_alloc_event_collector() == this) {
2778 state->set_sampled_object_alloc_event_collector((JvmtiSampledObjectAllocEventCollector*)_prev);
2779 } else {
2780 // this thread's jvmti state was created during the scope of
2781 // the event collector.
2782 }
2783 }
2784 }
2785 }
2786
2787 // create the dynamic code event collector
2788 JvmtiDynamicCodeEventCollector::JvmtiDynamicCodeEventCollector() : _code_blobs(NULL) {
2789 if (JvmtiExport::should_post_dynamic_code_generated()) {
2790 setup_jvmti_thread_state();
2791 }
2792 }
2793
2794 // iterate over any code blob descriptors collected and post a
2795 // DYNAMIC_CODE_GENERATED event to the profiler.
2796 JvmtiDynamicCodeEventCollector::~JvmtiDynamicCodeEventCollector() {
2797 assert(!JavaThread::current()->owns_locks(), "all locks must be released to post deferred events");
2798 // iterate over any code blob descriptors that we collected
2799 if (_code_blobs != NULL) {
2800 for (int i=0; i<_code_blobs->length(); i++) {
2801 JvmtiCodeBlobDesc* blob = _code_blobs->at(i);
2802 JvmtiExport::post_dynamic_code_generated(blob->name(), blob->code_begin(), blob->code_end());
2803 FreeHeap(blob);
2804 }
2805 delete _code_blobs;
2806 }
2807 unset_jvmti_thread_state();
2808 }
2809
2810 // register a stub
2811 void JvmtiDynamicCodeEventCollector::register_stub(const char* name, address start, address end) {
2812 if (_code_blobs == NULL) {
2813 _code_blobs = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<JvmtiCodeBlobDesc*>(1,true);
2814 }
2815 _code_blobs->append(new JvmtiCodeBlobDesc(name, start, end));
2816 }
2817
2818 // Setup current thread to record vm allocated objects.
2819 JvmtiObjectAllocEventCollector::JvmtiObjectAllocEventCollector() :
2820 _allocated(NULL), _enable(false), _post_callback(NULL) {
2821 }
2822
2823 // Post vm_object_alloc event for vm allocated objects visible to java
2824 // world.
2825 void JvmtiObjectAllocEventCollector::generate_call_for_allocated() {
2826 if (_allocated) {
2827 set_enabled(false);
2828 for (int i = 0; i < _allocated->length(); i++) {
2829 oop obj = _allocated->at(i);
2830 _post_callback(JavaThread::current(), obj);
2831 }
2832 delete _allocated, _allocated = NULL;
2833 }
2834 }
2835
2836 void JvmtiObjectAllocEventCollector::record_allocation(oop obj) {
2837 assert(is_enabled(), "Object alloc event collector is not enabled");
2838 if (_allocated == NULL) {
2839 _allocated = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<oop>(1, true);
2840 }
2841 _allocated->push(obj);
2842 }
2843
2844 // GC support.
2845 void JvmtiObjectAllocEventCollector::oops_do(OopClosure* f) {
2846 if (_allocated) {
2847 for(int i = _allocated->length() - 1; i >= 0; i--) {
2848 if (_allocated->at(i) != NULL) {
2849 f->do_oop(_allocated->adr_at(i));
2850 }
2851 }
2852 }
2853 }
2854
2855 void JvmtiObjectAllocEventCollector::oops_do_for_all_threads(OopClosure* f) {
2856 // no-op if jvmti not enabled
2857 if (!JvmtiEnv::environments_might_exist()) {
2858 return;
2859 }
2860
2861 for (JavaThreadIteratorWithHandle jtiwh; JavaThread *jthr = jtiwh.next(); ) {
2862 JvmtiThreadState *state = jthr->jvmti_thread_state();
2863 if (state != NULL) {
2864 JvmtiObjectAllocEventCollector *collector;
2865 collector = state->get_vm_object_alloc_event_collector();
2866 while (collector != NULL) {
2867 collector->oops_do(f);
2868 collector = (JvmtiObjectAllocEventCollector*) collector->get_prev();
2869 }
2870
2871 collector = state->get_sampled_object_alloc_event_collector();
2872 while (collector != NULL) {
2873 collector->oops_do(f);
2874 collector = (JvmtiObjectAllocEventCollector*) collector->get_prev();
2875 }
2876 }
2877 }
2878 }
2879
2880
2881 // Disable collection of VMObjectAlloc events
2882 NoJvmtiVMObjectAllocMark::NoJvmtiVMObjectAllocMark() : _collector(NULL) {
2883 // a no-op if VMObjectAlloc event is not enabled
2884 if (!JvmtiExport::should_post_vm_object_alloc()) {
2885 return;
2886 }
2887 Thread* thread = Thread::current_or_null();
2888 if (thread != NULL && thread->is_Java_thread()) {
2889 JavaThread* current_thread = (JavaThread*)thread;
2890 JvmtiThreadState *state = current_thread->jvmti_thread_state();
2891 if (state != NULL) {
2892 JvmtiVMObjectAllocEventCollector *collector;
2893 collector = state->get_vm_object_alloc_event_collector();
2894 if (collector != NULL && collector->is_enabled()) {
2895 _collector = collector;
2896 _collector->set_enabled(false);
2897 }
2898 }
2899 }
2900 }
2901
2902 // Re-Enable collection of VMObjectAlloc events (if previously enabled)
2903 NoJvmtiVMObjectAllocMark::~NoJvmtiVMObjectAllocMark() {
2904 if (was_enabled()) {
2905 _collector->set_enabled(true);
2906 }
2907 };
2908
2909 // Setup current thread to record vm allocated objects.
2910 JvmtiVMObjectAllocEventCollector::JvmtiVMObjectAllocEventCollector() {
2911 if (JvmtiExport::should_post_vm_object_alloc()) {
2912 _enable = true;
2913 setup_jvmti_thread_state();
2914 _post_callback = JvmtiExport::post_vm_object_alloc;
2915 }
2916 }
2917
2918 JvmtiVMObjectAllocEventCollector::~JvmtiVMObjectAllocEventCollector() {
2919 if (_enable) {
2920 generate_call_for_allocated();
2921 }
2922 unset_jvmti_thread_state();
2923 }
2924
2925 bool JvmtiSampledObjectAllocEventCollector::object_alloc_is_safe_to_sample() {
2926 Thread* thread = Thread::current();
2927 // Really only sample allocations if this is a JavaThread and not the compiler
2928 // thread.
2929 if (!thread->is_Java_thread() || thread->is_Compiler_thread()) {
2930 return false;
2931 }
2932
2933 if (Compile_lock->owner() == thread ||
2934 MultiArray_lock->owner() == thread) {
2935 return false;
2936 }
2937 return true;
2938 }
2939
2940 // Setup current thread to record sampled allocated objects.
2941 JvmtiSampledObjectAllocEventCollector::JvmtiSampledObjectAllocEventCollector() {
2942 if (JvmtiExport::should_post_sampled_object_alloc()) {
2943 if (!object_alloc_is_safe_to_sample()) {
2944 return;
2945 }
2946
2947 _enable = true;
2948 setup_jvmti_thread_state();
2949 _post_callback = JvmtiExport::post_sampled_object_alloc;
2950 }
2951 }
2952
2953 JvmtiSampledObjectAllocEventCollector::~JvmtiSampledObjectAllocEventCollector() {
2954 if (!_enable) {
2955 return;
2956 }
2957
2958 generate_call_for_allocated();
2959 unset_jvmti_thread_state();
2960
2961 // Unset the sampling collector as present in assertion mode only.
2962 assert(Thread::current()->is_Java_thread(),
2963 "Should always be in a Java thread");
2964 }
2965
2966 JvmtiGCMarker::JvmtiGCMarker() {
2967 // if there aren't any JVMTI environments then nothing to do
2968 if (!JvmtiEnv::environments_might_exist()) {
2969 return;
2970 }
2971
2972 if (JvmtiExport::should_post_garbage_collection_start()) {
2973 JvmtiExport::post_garbage_collection_start();
2974 }
2975
2976 if (SafepointSynchronize::is_at_safepoint()) {
2977 // Do clean up tasks that need to be done at a safepoint
2978 JvmtiEnvBase::check_for_periodic_clean_up();
2979 }
2980 }
2981
2982 JvmtiGCMarker::~JvmtiGCMarker() {
2983 // if there aren't any JVMTI environments then nothing to do
2984 if (!JvmtiEnv::environments_might_exist()) {
2985 return;
2986 }
2987
2988 // JVMTI notify gc finish
2989 if (JvmtiExport::should_post_garbage_collection_finish()) {
2990 JvmtiExport::post_garbage_collection_finish();
2991 }
2992 }