1 /*
2 * Copyright (c) 2003, 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/systemDictionary.hpp"
27 #include "code/nmethod.hpp"
28 #include "code/pcDesc.hpp"
29 #include "code/scopeDesc.hpp"
30 #include "interpreter/interpreter.hpp"
31 #include "jvmtifiles/jvmtiEnv.hpp"
32 #include "logging/log.hpp"
33 #include "logging/logStream.hpp"
34 #include "memory/allocation.inline.hpp"
35 #include "memory/resourceArea.hpp"
36 #include "oops/objArrayKlass.hpp"
37 #include "oops/objArrayOop.hpp"
38 #include "oops/oop.inline.hpp"
39 #include "prims/jvmtiCodeBlobEvents.hpp"
40 #include "prims/jvmtiEventController.hpp"
41 #include "prims/jvmtiEventController.inline.hpp"
42 #include "prims/jvmtiExport.hpp"
43 #include "prims/jvmtiImpl.hpp"
44 #include "prims/jvmtiManageCapabilities.hpp"
45 #include "prims/jvmtiRawMonitor.hpp"
46 #include "prims/jvmtiRedefineClasses.hpp"
47 #include "prims/jvmtiTagMap.hpp"
48 #include "prims/jvmtiThreadState.inline.hpp"
49 #include "runtime/arguments.hpp"
50 #include "runtime/handles.hpp"
51 #include "runtime/interfaceSupport.inline.hpp"
52 #include "runtime/javaCalls.hpp"
53 #include "runtime/jniHandles.inline.hpp"
54 #include "runtime/objectMonitor.hpp"
55 #include "runtime/objectMonitor.inline.hpp"
56 #include "runtime/os.inline.hpp"
57 #include "runtime/safepointVerifiers.hpp"
58 #include "runtime/thread.inline.hpp"
59 #include "runtime/threadSMR.hpp"
60 #include "runtime/vframe.inline.hpp"
61 #include "utilities/macros.hpp"
62
63 #ifdef JVMTI_TRACE
64 #define EVT_TRACE(evt,out) if ((JvmtiTrace::event_trace_flags(evt) & JvmtiTrace::SHOW_EVENT_SENT) != 0) { SafeResourceMark rm; log_trace(jvmti) out; }
65 #define EVT_TRIG_TRACE(evt,out) if ((JvmtiTrace::event_trace_flags(evt) & JvmtiTrace::SHOW_EVENT_TRIGGER) != 0) { SafeResourceMark rm; log_trace(jvmti) out; }
66 #else
67 #define EVT_TRIG_TRACE(evt,out)
68 #define EVT_TRACE(evt,out)
69 #endif
70
71 ///////////////////////////////////////////////////////////////
72 //
73 // JvmtiEventTransition
74 //
75 // TO DO --
76 // more handle purging
77
78 // Use this for JavaThreads and state is _thread_in_vm.
79 class JvmtiJavaThreadEventTransition : StackObj {
80 private:
81 ResourceMark _rm;
82 ThreadToNativeFromVM _transition;
83 HandleMark _hm;
84
85 public:
86 JvmtiJavaThreadEventTransition(JavaThread *thread) :
87 _rm(),
88 _transition(thread),
89 _hm(thread) {};
90 };
91
92 // For JavaThreads which are not in _thread_in_vm state
93 // and other system threads use this.
94 class JvmtiThreadEventTransition : StackObj {
95 private:
96 ResourceMark _rm;
97 HandleMark _hm;
98 JavaThreadState _saved_state;
99 JavaThread *_jthread;
100
101 public:
102 JvmtiThreadEventTransition(Thread *thread) : _rm(), _hm() {
103 if (thread->is_Java_thread()) {
104 _jthread = (JavaThread *)thread;
105 _saved_state = _jthread->thread_state();
106 if (_saved_state == _thread_in_Java) {
107 ThreadStateTransition::transition_from_java(_jthread, _thread_in_native);
108 } else {
109 ThreadStateTransition::transition(_jthread, _saved_state, _thread_in_native);
110 }
111 } else {
112 _jthread = NULL;
113 }
114 }
115
116 ~JvmtiThreadEventTransition() {
117 if (_jthread != NULL)
118 ThreadStateTransition::transition_from_native(_jthread, _saved_state);
119 }
120 };
121
122
123 ///////////////////////////////////////////////////////////////
124 //
125 // JvmtiEventMark
126 //
127
128 class JvmtiEventMark : public StackObj {
129 private:
130 JavaThread *_thread;
131 JNIEnv* _jni_env;
132 JvmtiThreadState::ExceptionState _saved_exception_state;
133 #if 0
134 JNIHandleBlock* _hblock;
135 #endif
136
137 public:
138 JvmtiEventMark(JavaThread *thread) : _thread(thread),
139 _jni_env(thread->jni_environment()),
140 _saved_exception_state(JvmtiThreadState::ES_CLEARED) {
141 #if 0
142 _hblock = thread->active_handles();
143 _hblock->clear_thoroughly(); // so we can be safe
144 #else
145 // we want to use the code above - but that needs the JNIHandle changes - later...
146 // for now, steal JNI push local frame code
147 JvmtiThreadState *state = thread->jvmti_thread_state();
148 // we are before an event.
149 // Save current jvmti thread exception state.
150 if (state != NULL) {
151 _saved_exception_state = state->get_exception_state();
152 }
153
154 JNIHandleBlock* old_handles = thread->active_handles();
155 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread);
156 assert(new_handles != NULL, "should not be NULL");
157 new_handles->set_pop_frame_link(old_handles);
158 thread->set_active_handles(new_handles);
159 #endif
160 assert(thread == JavaThread::current(), "thread must be current!");
161 thread->frame_anchor()->make_walkable(thread);
162 };
163
164 ~JvmtiEventMark() {
165 #if 0
166 _hblock->clear(); // for consistency with future correct behavior
167 #else
168 // we want to use the code above - but that needs the JNIHandle changes - later...
169 // for now, steal JNI pop local frame code
170 JNIHandleBlock* old_handles = _thread->active_handles();
171 JNIHandleBlock* new_handles = old_handles->pop_frame_link();
172 assert(new_handles != NULL, "should not be NULL");
173 _thread->set_active_handles(new_handles);
174 // Note that we set the pop_frame_link to NULL explicitly, otherwise
175 // the release_block call will release the blocks.
176 old_handles->set_pop_frame_link(NULL);
177 JNIHandleBlock::release_block(old_handles, _thread); // may block
178 #endif
179
180 JvmtiThreadState* state = _thread->jvmti_thread_state();
181 // we are continuing after an event.
182 if (state != NULL) {
183 // Restore the jvmti thread exception state.
184 state->restore_exception_state(_saved_exception_state);
185 }
186 }
187
188 #if 0
189 jobject to_jobject(oop obj) { return obj == NULL? NULL : _hblock->allocate_handle_fast(obj); }
190 #else
191 // we want to use the code above - but that needs the JNIHandle changes - later...
192 // for now, use regular make_local
193 jobject to_jobject(oop obj) { return JNIHandles::make_local(_thread,obj); }
194 #endif
195
196 jclass to_jclass(Klass* klass) { return (klass == NULL ? NULL : (jclass)to_jobject(klass->java_mirror())); }
197
198 jmethodID to_jmethodID(const methodHandle& method) { return method->jmethod_id(); }
199
200 JNIEnv* jni_env() { return _jni_env; }
201 };
202
203 class JvmtiThreadEventMark : public JvmtiEventMark {
204 private:
205 jthread _jt;
206
207 public:
208 JvmtiThreadEventMark(JavaThread *thread) :
209 JvmtiEventMark(thread) {
210 _jt = (jthread)(to_jobject(thread->threadObj()));
211 };
212 jthread jni_thread() { return _jt; }
213 };
214
215 class JvmtiClassEventMark : public JvmtiThreadEventMark {
216 private:
217 jclass _jc;
218
219 public:
220 JvmtiClassEventMark(JavaThread *thread, Klass* klass) :
221 JvmtiThreadEventMark(thread) {
222 _jc = to_jclass(klass);
223 };
224 jclass jni_class() { return _jc; }
225 };
226
227 class JvmtiMethodEventMark : public JvmtiThreadEventMark {
228 private:
229 jmethodID _mid;
230
231 public:
232 JvmtiMethodEventMark(JavaThread *thread, const methodHandle& method) :
233 JvmtiThreadEventMark(thread),
234 _mid(to_jmethodID(method)) {};
235 jmethodID jni_methodID() { return _mid; }
236 };
237
238 class JvmtiLocationEventMark : public JvmtiMethodEventMark {
239 private:
240 jlocation _loc;
241
242 public:
243 JvmtiLocationEventMark(JavaThread *thread, const methodHandle& method, address location) :
244 JvmtiMethodEventMark(thread, method),
245 _loc(location - method->code_base()) {};
246 jlocation location() { return _loc; }
247 };
248
249 class JvmtiExceptionEventMark : public JvmtiLocationEventMark {
250 private:
251 jobject _exc;
252
253 public:
254 JvmtiExceptionEventMark(JavaThread *thread, const methodHandle& method, address location, Handle exception) :
255 JvmtiLocationEventMark(thread, method, location),
256 _exc(to_jobject(exception())) {};
257 jobject exception() { return _exc; }
258 };
259
260 class JvmtiClassFileLoadEventMark : public JvmtiThreadEventMark {
261 private:
262 const char *_class_name;
263 jobject _jloader;
264 jobject _protection_domain;
265 jclass _class_being_redefined;
266
267 public:
268 JvmtiClassFileLoadEventMark(JavaThread *thread, Symbol* name,
269 Handle class_loader, Handle prot_domain, Klass* class_being_redefined) : JvmtiThreadEventMark(thread) {
270 _class_name = name != NULL? name->as_utf8() : NULL;
271 _jloader = (jobject)to_jobject(class_loader());
272 _protection_domain = (jobject)to_jobject(prot_domain());
273 if (class_being_redefined == NULL) {
274 _class_being_redefined = NULL;
275 } else {
276 _class_being_redefined = (jclass)to_jclass(class_being_redefined);
277 }
278 };
279 const char *class_name() {
280 return _class_name;
281 }
282 jobject jloader() {
283 return _jloader;
284 }
285 jobject protection_domain() {
286 return _protection_domain;
287 }
288 jclass class_being_redefined() {
289 return _class_being_redefined;
290 }
291 };
292
293 //////////////////////////////////////////////////////////////////////////////
294
295 int JvmtiExport::_field_access_count = 0;
296 int JvmtiExport::_field_modification_count = 0;
297
298 bool JvmtiExport::_can_access_local_variables = false;
299 bool JvmtiExport::_can_hotswap_or_post_breakpoint = false;
300 bool JvmtiExport::_can_modify_any_class = false;
301 bool JvmtiExport::_can_walk_any_space = false;
302
303 bool JvmtiExport::_has_redefined_a_class = false;
304 bool JvmtiExport::_all_dependencies_are_recorded = false;
305
306 //
307 // field access management
308 //
309
310 // interpreter generator needs the address of the counter
311 address JvmtiExport::get_field_access_count_addr() {
312 // We don't grab a lock because we don't want to
313 // serialize field access between all threads. This means that a
314 // thread on another processor can see the wrong count value and
315 // may either miss making a needed call into post_field_access()
316 // or will make an unneeded call into post_field_access(). We pay
317 // this price to avoid slowing down the VM when we aren't watching
318 // field accesses.
319 // Other access/mutation safe by virtue of being in VM state.
320 return (address)(&_field_access_count);
321 }
322
323 //
324 // field modification management
325 //
326
327 // interpreter generator needs the address of the counter
328 address JvmtiExport::get_field_modification_count_addr() {
329 // We don't grab a lock because we don't
330 // want to serialize field modification between all threads. This
331 // means that a thread on another processor can see the wrong
332 // count value and may either miss making a needed call into
333 // post_field_modification() or will make an unneeded call into
334 // post_field_modification(). We pay this price to avoid slowing
335 // down the VM when we aren't watching field modifications.
336 // Other access/mutation safe by virtue of being in VM state.
337 return (address)(&_field_modification_count);
338 }
339
340
341 ///////////////////////////////////////////////////////////////
342 // Functions needed by java.lang.instrument for starting up javaagent.
343 ///////////////////////////////////////////////////////////////
344
345 jint
346 JvmtiExport::get_jvmti_interface(JavaVM *jvm, void **penv, jint version) {
347 // The JVMTI_VERSION_INTERFACE_JVMTI part of the version number
348 // has already been validated in JNI GetEnv().
349 int major, minor, micro;
350
351 // micro version doesn't matter here (yet?)
352 decode_version_values(version, &major, &minor, µ);
353 switch (major) {
354 case 1:
355 switch (minor) {
356 case 0: // version 1.0.<micro> is recognized
357 case 1: // version 1.1.<micro> is recognized
358 case 2: // version 1.2.<micro> is recognized
359 break;
360
361 default:
362 return JNI_EVERSION; // unsupported minor version number
363 }
364 break;
365 case 9:
366 switch (minor) {
367 case 0: // version 9.0.<micro> is recognized
368 break;
369 default:
370 return JNI_EVERSION; // unsupported minor version number
371 }
372 break;
373 default:
374 return JNI_EVERSION; // unsupported major version number
375 }
376
377 if (JvmtiEnv::get_phase() == JVMTI_PHASE_LIVE) {
378 JavaThread* current_thread = JavaThread::current();
379 // transition code: native to VM
380 ThreadInVMfromNative __tiv(current_thread);
381 VM_ENTRY_BASE(jvmtiEnv*, JvmtiExport::get_jvmti_interface, current_thread)
382 debug_only(VMNativeEntryWrapper __vew;)
383
384 JvmtiEnv *jvmti_env = JvmtiEnv::create_a_jvmti(version);
385 *penv = jvmti_env->jvmti_external(); // actual type is jvmtiEnv* -- not to be confused with JvmtiEnv*
386 return JNI_OK;
387
388 } else if (JvmtiEnv::get_phase() == JVMTI_PHASE_ONLOAD) {
389 // not live, no thread to transition
390 JvmtiEnv *jvmti_env = JvmtiEnv::create_a_jvmti(version);
391 *penv = jvmti_env->jvmti_external(); // actual type is jvmtiEnv* -- not to be confused with JvmtiEnv*
392 return JNI_OK;
393
394 } else {
395 // Called at the wrong time
396 *penv = NULL;
397 return JNI_EDETACHED;
398 }
399 }
400
401 void
402 JvmtiExport::add_default_read_edges(Handle h_module, TRAPS) {
403 if (!Universe::is_module_initialized()) {
404 return; // extra safety
405 }
406 assert(!h_module.is_null(), "module should always be set");
407
408 // Invoke the transformedByAgent method
409 JavaValue result(T_VOID);
410 JavaCalls::call_static(&result,
411 SystemDictionary::module_Modules_klass(),
412 vmSymbols::transformedByAgent_name(),
413 vmSymbols::transformedByAgent_signature(),
414 h_module,
415 THREAD);
416
417 if (HAS_PENDING_EXCEPTION) {
418 LogTarget(Trace, jvmti) log;
419 LogStream log_stream(log);
420 java_lang_Throwable::print(PENDING_EXCEPTION, &log_stream);
421 log_stream.cr();
422 CLEAR_PENDING_EXCEPTION;
423 return;
424 }
425 }
426
427 jvmtiError
428 JvmtiExport::add_module_reads(Handle module, Handle to_module, TRAPS) {
429 if (!Universe::is_module_initialized()) {
430 return JVMTI_ERROR_NONE; // extra safety
431 }
432 assert(!module.is_null(), "module should always be set");
433 assert(!to_module.is_null(), "to_module should always be set");
434
435 // Invoke the addReads method
436 JavaValue result(T_VOID);
437 JavaCalls::call_static(&result,
438 SystemDictionary::module_Modules_klass(),
439 vmSymbols::addReads_name(),
440 vmSymbols::addReads_signature(),
441 module,
442 to_module,
443 THREAD);
444
445 if (HAS_PENDING_EXCEPTION) {
446 LogTarget(Trace, jvmti) log;
447 LogStream log_stream(log);
448 java_lang_Throwable::print(PENDING_EXCEPTION, &log_stream);
449 log_stream.cr();
450 CLEAR_PENDING_EXCEPTION;
451 return JVMTI_ERROR_INTERNAL;
452 }
453 return JVMTI_ERROR_NONE;
454 }
455
456 jvmtiError
457 JvmtiExport::add_module_exports(Handle module, Handle pkg_name, Handle to_module, TRAPS) {
458 if (!Universe::is_module_initialized()) {
459 return JVMTI_ERROR_NONE; // extra safety
460 }
461 assert(!module.is_null(), "module should always be set");
462 assert(!to_module.is_null(), "to_module should always be set");
463 assert(!pkg_name.is_null(), "pkg_name should always be set");
464
465 // Invoke the addExports method
466 JavaValue result(T_VOID);
467 JavaCalls::call_static(&result,
468 SystemDictionary::module_Modules_klass(),
469 vmSymbols::addExports_name(),
470 vmSymbols::addExports_signature(),
471 module,
472 pkg_name,
473 to_module,
474 THREAD);
475
476 if (HAS_PENDING_EXCEPTION) {
477 Symbol* ex_name = PENDING_EXCEPTION->klass()->name();
478 LogTarget(Trace, jvmti) log;
479 LogStream log_stream(log);
480 java_lang_Throwable::print(PENDING_EXCEPTION, &log_stream);
481 log_stream.cr();
482 CLEAR_PENDING_EXCEPTION;
483 if (ex_name == vmSymbols::java_lang_IllegalArgumentException()) {
484 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
485 }
486 return JVMTI_ERROR_INTERNAL;
487 }
488 return JVMTI_ERROR_NONE;
489 }
490
491 jvmtiError
492 JvmtiExport::add_module_opens(Handle module, Handle pkg_name, Handle to_module, TRAPS) {
493 if (!Universe::is_module_initialized()) {
494 return JVMTI_ERROR_NONE; // extra safety
495 }
496 assert(!module.is_null(), "module should always be set");
497 assert(!to_module.is_null(), "to_module should always be set");
498 assert(!pkg_name.is_null(), "pkg_name should always be set");
499
500 // Invoke the addOpens method
501 JavaValue result(T_VOID);
502 JavaCalls::call_static(&result,
503 SystemDictionary::module_Modules_klass(),
504 vmSymbols::addOpens_name(),
505 vmSymbols::addExports_signature(),
506 module,
507 pkg_name,
508 to_module,
509 THREAD);
510
511 if (HAS_PENDING_EXCEPTION) {
512 Symbol* ex_name = PENDING_EXCEPTION->klass()->name();
513 LogTarget(Trace, jvmti) log;
514 LogStream log_stream(log);
515 java_lang_Throwable::print(PENDING_EXCEPTION, &log_stream);
516 log_stream.cr();
517 CLEAR_PENDING_EXCEPTION;
518 if (ex_name == vmSymbols::java_lang_IllegalArgumentException()) {
519 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
520 }
521 return JVMTI_ERROR_INTERNAL;
522 }
523 return JVMTI_ERROR_NONE;
524 }
525
526 jvmtiError
527 JvmtiExport::add_module_uses(Handle module, Handle service, TRAPS) {
528 if (!Universe::is_module_initialized()) {
529 return JVMTI_ERROR_NONE; // extra safety
530 }
531 assert(!module.is_null(), "module should always be set");
532 assert(!service.is_null(), "service should always be set");
533
534 // Invoke the addUses method
535 JavaValue result(T_VOID);
536 JavaCalls::call_static(&result,
537 SystemDictionary::module_Modules_klass(),
538 vmSymbols::addUses_name(),
539 vmSymbols::addUses_signature(),
540 module,
541 service,
542 THREAD);
543
544 if (HAS_PENDING_EXCEPTION) {
545 LogTarget(Trace, jvmti) log;
546 LogStream log_stream(log);
547 java_lang_Throwable::print(PENDING_EXCEPTION, &log_stream);
548 log_stream.cr();
549 CLEAR_PENDING_EXCEPTION;
550 return JVMTI_ERROR_INTERNAL;
551 }
552 return JVMTI_ERROR_NONE;
553 }
554
555 jvmtiError
556 JvmtiExport::add_module_provides(Handle module, Handle service, Handle impl_class, TRAPS) {
557 if (!Universe::is_module_initialized()) {
558 return JVMTI_ERROR_NONE; // extra safety
559 }
560 assert(!module.is_null(), "module should always be set");
561 assert(!service.is_null(), "service should always be set");
562 assert(!impl_class.is_null(), "impl_class should always be set");
563
564 // Invoke the addProvides method
565 JavaValue result(T_VOID);
566 JavaCalls::call_static(&result,
567 SystemDictionary::module_Modules_klass(),
568 vmSymbols::addProvides_name(),
569 vmSymbols::addProvides_signature(),
570 module,
571 service,
572 impl_class,
573 THREAD);
574
575 if (HAS_PENDING_EXCEPTION) {
576 LogTarget(Trace, jvmti) log;
577 LogStream log_stream(log);
578 java_lang_Throwable::print(PENDING_EXCEPTION, &log_stream);
579 log_stream.cr();
580 CLEAR_PENDING_EXCEPTION;
581 return JVMTI_ERROR_INTERNAL;
582 }
583 return JVMTI_ERROR_NONE;
584 }
585
586 void
587 JvmtiExport::decode_version_values(jint version, int * major, int * minor,
588 int * micro) {
589 *major = (version & JVMTI_VERSION_MASK_MAJOR) >> JVMTI_VERSION_SHIFT_MAJOR;
590 *minor = (version & JVMTI_VERSION_MASK_MINOR) >> JVMTI_VERSION_SHIFT_MINOR;
591 *micro = (version & JVMTI_VERSION_MASK_MICRO) >> JVMTI_VERSION_SHIFT_MICRO;
592 }
593
594 void JvmtiExport::enter_primordial_phase() {
595 JvmtiEnvBase::set_phase(JVMTI_PHASE_PRIMORDIAL);
596 }
597
598 void JvmtiExport::enter_early_start_phase() {
599 set_early_vmstart_recorded(true);
600 }
601
602 void JvmtiExport::enter_start_phase() {
603 JvmtiEnvBase::set_phase(JVMTI_PHASE_START);
604 }
605
606 void JvmtiExport::enter_onload_phase() {
607 JvmtiEnvBase::set_phase(JVMTI_PHASE_ONLOAD);
608 }
609
610 void JvmtiExport::enter_live_phase() {
611 JvmtiEnvBase::set_phase(JVMTI_PHASE_LIVE);
612 }
613
614 //
615 // JVMTI events that the VM posts to the debugger and also startup agent
616 // and call the agent's premain() for java.lang.instrument.
617 //
618
619 void JvmtiExport::post_early_vm_start() {
620 EVT_TRIG_TRACE(JVMTI_EVENT_VM_START, ("Trg Early VM start event triggered" ));
621
622 // can now enable some events
623 JvmtiEventController::vm_start();
624
625 JvmtiEnvIterator it;
626 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
627 // Only early vmstart envs post early VMStart event
628 if (env->early_vmstart_env() && env->is_enabled(JVMTI_EVENT_VM_START)) {
629 EVT_TRACE(JVMTI_EVENT_VM_START, ("Evt Early VM start event sent" ));
630 JavaThread *thread = JavaThread::current();
631 JvmtiThreadEventMark jem(thread);
632 JvmtiJavaThreadEventTransition jet(thread);
633 jvmtiEventVMStart callback = env->callbacks()->VMStart;
634 if (callback != NULL) {
635 (*callback)(env->jvmti_external(), jem.jni_env());
636 }
637 }
638 }
639 }
640
641 void JvmtiExport::post_vm_start() {
642 EVT_TRIG_TRACE(JVMTI_EVENT_VM_START, ("Trg VM start event triggered" ));
643
644 // can now enable some events
645 JvmtiEventController::vm_start();
646
647 JvmtiEnvIterator it;
648 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
649 // Early vmstart envs do not post normal VMStart event
650 if (!env->early_vmstart_env() && env->is_enabled(JVMTI_EVENT_VM_START)) {
651 EVT_TRACE(JVMTI_EVENT_VM_START, ("Evt VM start event sent" ));
652
653 JavaThread *thread = JavaThread::current();
654 JvmtiThreadEventMark jem(thread);
655 JvmtiJavaThreadEventTransition jet(thread);
656 jvmtiEventVMStart callback = env->callbacks()->VMStart;
657 if (callback != NULL) {
658 (*callback)(env->jvmti_external(), jem.jni_env());
659 }
660 }
661 }
662 }
663
664
665 void JvmtiExport::post_vm_initialized() {
666 EVT_TRIG_TRACE(JVMTI_EVENT_VM_INIT, ("Trg VM init event triggered" ));
667
668 // can now enable events
669 JvmtiEventController::vm_init();
670
671 JvmtiEnvIterator it;
672 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
673 if (env->is_enabled(JVMTI_EVENT_VM_INIT)) {
674 EVT_TRACE(JVMTI_EVENT_VM_INIT, ("Evt VM init event sent" ));
675
676 JavaThread *thread = JavaThread::current();
677 JvmtiThreadEventMark jem(thread);
678 JvmtiJavaThreadEventTransition jet(thread);
679 jvmtiEventVMInit callback = env->callbacks()->VMInit;
680 if (callback != NULL) {
681 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread());
682 }
683 }
684 }
685 }
686
687
688 void JvmtiExport::post_vm_death() {
689 EVT_TRIG_TRACE(JVMTI_EVENT_VM_DEATH, ("Trg VM death event triggered" ));
690
691 JvmtiEnvIterator it;
692 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
693 if (env->is_enabled(JVMTI_EVENT_VM_DEATH)) {
694 EVT_TRACE(JVMTI_EVENT_VM_DEATH, ("Evt VM death event sent" ));
695
696 JavaThread *thread = JavaThread::current();
697 JvmtiEventMark jem(thread);
698 JvmtiJavaThreadEventTransition jet(thread);
699 jvmtiEventVMDeath callback = env->callbacks()->VMDeath;
700 if (callback != NULL) {
701 (*callback)(env->jvmti_external(), jem.jni_env());
702 }
703 }
704 }
705
706 JvmtiEnvBase::set_phase(JVMTI_PHASE_DEAD);
707 JvmtiEventController::vm_death();
708 }
709
710 char**
711 JvmtiExport::get_all_native_method_prefixes(int* count_ptr) {
712 // Have to grab JVMTI thread state lock to be sure environment doesn't
713 // go away while we iterate them. No locks during VM bring-up.
714 if (Threads::number_of_threads() == 0 || SafepointSynchronize::is_at_safepoint()) {
715 return JvmtiEnvBase::get_all_native_method_prefixes(count_ptr);
716 } else {
717 MutexLocker mu(JvmtiThreadState_lock);
718 return JvmtiEnvBase::get_all_native_method_prefixes(count_ptr);
719 }
720 }
721
722 // Convert an external thread reference to a JavaThread found on the
723 // specified ThreadsList. The ThreadsListHandle in the caller "protects"
724 // the returned JavaThread *.
725 //
726 // If thread_oop_p is not NULL, then the caller wants to use the oop
727 // after this call so the oop is returned. On success, *jt_pp is set
728 // to the converted JavaThread * and JVMTI_ERROR_NONE is returned.
729 // On error, returns various JVMTI_ERROR_* values.
730 //
731 jvmtiError
732 JvmtiExport::cv_external_thread_to_JavaThread(ThreadsList * t_list,
733 jthread thread,
734 JavaThread ** jt_pp,
735 oop * thread_oop_p) {
736 assert(t_list != NULL, "must have a ThreadsList");
737 assert(jt_pp != NULL, "must have a return JavaThread pointer");
738 // thread_oop_p is optional so no assert()
739
740 oop thread_oop = JNIHandles::resolve_external_guard(thread);
741 if (thread_oop == NULL) {
742 // NULL jthread, GC'ed jthread or a bad JNI handle.
743 return JVMTI_ERROR_INVALID_THREAD;
744 }
745 // Looks like an oop at this point.
746
747 if (!thread_oop->is_a(SystemDictionary::Thread_klass())) {
748 // The oop is not a java.lang.Thread.
749 return JVMTI_ERROR_INVALID_THREAD;
750 }
751 // Looks like a java.lang.Thread oop at this point.
752
753 if (thread_oop_p != NULL) {
754 // Return the oop to the caller; the caller may still want
755 // the oop even if this function returns an error.
756 *thread_oop_p = thread_oop;
757 }
758
759 JavaThread * java_thread = java_lang_Thread::thread(thread_oop);
760 if (java_thread == NULL) {
761 // The java.lang.Thread does not contain a JavaThread * so it has
762 // not yet run or it has died.
763 return JVMTI_ERROR_THREAD_NOT_ALIVE;
764 }
765 // Looks like a live JavaThread at this point.
766
767 // We do not check the EnableThreadSMRExtraValidityChecks option
768 // for this includes() call because JVM/TI's spec is tighter.
769 if (!t_list->includes(java_thread)) {
770 // Not on the JavaThreads list so it is not alive.
771 return JVMTI_ERROR_THREAD_NOT_ALIVE;
772 }
773
774 // Return a live JavaThread that is "protected" by the
775 // ThreadsListHandle in the caller.
776 *jt_pp = java_thread;
777
778 return JVMTI_ERROR_NONE;
779 }
780
781 // Convert an oop to a JavaThread found on the specified ThreadsList.
782 // The ThreadsListHandle in the caller "protects" the returned
783 // JavaThread *.
784 //
785 // On success, *jt_pp is set to the converted JavaThread * and
786 // JVMTI_ERROR_NONE is returned. On error, returns various
787 // JVMTI_ERROR_* values.
788 //
789 jvmtiError
790 JvmtiExport::cv_oop_to_JavaThread(ThreadsList * t_list, oop thread_oop,
791 JavaThread ** jt_pp) {
792 assert(t_list != NULL, "must have a ThreadsList");
793 assert(thread_oop != NULL, "must have an oop");
794 assert(jt_pp != NULL, "must have a return JavaThread pointer");
795
796 if (!thread_oop->is_a(SystemDictionary::Thread_klass())) {
797 // The oop is not a java.lang.Thread.
798 return JVMTI_ERROR_INVALID_THREAD;
799 }
800 // Looks like a java.lang.Thread oop at this point.
801
802 JavaThread * java_thread = java_lang_Thread::thread(thread_oop);
803 if (java_thread == NULL) {
804 // The java.lang.Thread does not contain a JavaThread * so it has
805 // not yet run or it has died.
806 return JVMTI_ERROR_THREAD_NOT_ALIVE;
807 }
808 // Looks like a live JavaThread at this point.
809
810 // We do not check the EnableThreadSMRExtraValidityChecks option
811 // for this includes() call because JVM/TI's spec is tighter.
812 if (!t_list->includes(java_thread)) {
813 // Not on the JavaThreads list so it is not alive.
814 return JVMTI_ERROR_THREAD_NOT_ALIVE;
815 }
816
817 // Return a live JavaThread that is "protected" by the
818 // ThreadsListHandle in the caller.
819 *jt_pp = java_thread;
820
821 return JVMTI_ERROR_NONE;
822 }
823
824 class JvmtiClassFileLoadHookPoster : public StackObj {
825 private:
826 Symbol* _h_name;
827 Handle _class_loader;
828 Handle _h_protection_domain;
829 unsigned char ** _data_ptr;
830 unsigned char ** _end_ptr;
831 JavaThread * _thread;
832 jint _curr_len;
833 unsigned char * _curr_data;
834 JvmtiEnv * _curr_env;
835 JvmtiCachedClassFileData ** _cached_class_file_ptr;
836 JvmtiThreadState * _state;
837 Klass* _class_being_redefined;
838 JvmtiClassLoadKind _load_kind;
839 bool _has_been_modified;
840
841 public:
842 inline JvmtiClassFileLoadHookPoster(Symbol* h_name, Handle class_loader,
843 Handle h_protection_domain,
844 unsigned char **data_ptr, unsigned char **end_ptr,
845 JvmtiCachedClassFileData **cache_ptr) {
846 _h_name = h_name;
847 _class_loader = class_loader;
848 _h_protection_domain = h_protection_domain;
849 _data_ptr = data_ptr;
850 _end_ptr = end_ptr;
851 _thread = JavaThread::current();
852 _curr_len = *end_ptr - *data_ptr;
853 _curr_data = *data_ptr;
854 _curr_env = NULL;
855 _cached_class_file_ptr = cache_ptr;
856 _has_been_modified = false;
857
858 _state = _thread->jvmti_thread_state();
859 if (_state != NULL) {
860 _class_being_redefined = _state->get_class_being_redefined();
861 _load_kind = _state->get_class_load_kind();
862 Klass* klass = (_class_being_redefined == NULL) ? NULL : _class_being_redefined;
863 if (_load_kind != jvmti_class_load_kind_load && klass != NULL) {
864 ModuleEntry* module_entry = InstanceKlass::cast(klass)->module();
865 assert(module_entry != NULL, "module_entry should always be set");
866 if (module_entry->is_named() &&
867 module_entry->module() != NULL &&
868 !module_entry->has_default_read_edges()) {
869 if (!module_entry->set_has_default_read_edges()) {
870 // We won a potential race.
871 // Add read edges to the unnamed modules of the bootstrap and app class loaders
872 Handle class_module(_thread, module_entry->module()); // Obtain j.l.r.Module
873 JvmtiExport::add_default_read_edges(class_module, _thread);
874 }
875 }
876 }
877 // Clear class_being_redefined flag here. The action
878 // from agent handler could generate a new class file load
879 // hook event and if it is not cleared the new event generated
880 // from regular class file load could have this stale redefined
881 // class handle info.
882 _state->clear_class_being_redefined();
883 } else {
884 // redefine and retransform will always set the thread state
885 _class_being_redefined = NULL;
886 _load_kind = jvmti_class_load_kind_load;
887 }
888 }
889
890 void post() {
891 post_all_envs();
892 copy_modified_data();
893 }
894
895 bool has_been_modified() { return _has_been_modified; }
896
897 private:
898 void post_all_envs() {
899 if (_load_kind != jvmti_class_load_kind_retransform) {
900 // for class load and redefine,
901 // call the non-retransformable agents
902 JvmtiEnvIterator it;
903 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
904 if (!env->is_retransformable() && env->is_enabled(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK)) {
905 // non-retransformable agents cannot retransform back,
906 // so no need to cache the original class file bytes
907 post_to_env(env, false);
908 }
909 }
910 }
911 JvmtiEnvIterator it;
912 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
913 // retransformable agents get all events
914 if (env->is_retransformable() && env->is_enabled(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK)) {
915 // retransformable agents need to cache the original class file
916 // bytes if changes are made via the ClassFileLoadHook
917 post_to_env(env, true);
918 }
919 }
920 }
921
922 void post_to_env(JvmtiEnv* env, bool caching_needed) {
923 if (env->phase() == JVMTI_PHASE_PRIMORDIAL && !env->early_class_hook_env()) {
924 return;
925 }
926 unsigned char *new_data = NULL;
927 jint new_len = 0;
928 JvmtiClassFileLoadEventMark jem(_thread, _h_name, _class_loader,
929 _h_protection_domain,
930 _class_being_redefined);
931 JvmtiJavaThreadEventTransition jet(_thread);
932 jvmtiEventClassFileLoadHook callback = env->callbacks()->ClassFileLoadHook;
933 if (callback != NULL) {
934 (*callback)(env->jvmti_external(), jem.jni_env(),
935 jem.class_being_redefined(),
936 jem.jloader(), jem.class_name(),
937 jem.protection_domain(),
938 _curr_len, _curr_data,
939 &new_len, &new_data);
940 }
941 if (new_data != NULL) {
942 // this agent has modified class data.
943 _has_been_modified = true;
944 if (caching_needed && *_cached_class_file_ptr == NULL) {
945 // data has been changed by the new retransformable agent
946 // and it hasn't already been cached, cache it
947 JvmtiCachedClassFileData *p;
948 p = (JvmtiCachedClassFileData *)os::malloc(
949 offset_of(JvmtiCachedClassFileData, data) + _curr_len, mtInternal);
950 if (p == NULL) {
951 vm_exit_out_of_memory(offset_of(JvmtiCachedClassFileData, data) + _curr_len,
952 OOM_MALLOC_ERROR,
953 "unable to allocate cached copy of original class bytes");
954 }
955 p->length = _curr_len;
956 memcpy(p->data, _curr_data, _curr_len);
957 *_cached_class_file_ptr = p;
958 }
959
960 if (_curr_data != *_data_ptr) {
961 // curr_data is previous agent modified class data.
962 // And this has been changed by the new agent so
963 // we can delete it now.
964 _curr_env->Deallocate(_curr_data);
965 }
966
967 // Class file data has changed by the current agent.
968 _curr_data = new_data;
969 _curr_len = new_len;
970 // Save the current agent env we need this to deallocate the
971 // memory allocated by this agent.
972 _curr_env = env;
973 }
974 }
975
976 void copy_modified_data() {
977 // if one of the agent has modified class file data.
978 // Copy modified class data to new resources array.
979 if (_curr_data != *_data_ptr) {
980 *_data_ptr = NEW_RESOURCE_ARRAY(u1, _curr_len);
981 memcpy(*_data_ptr, _curr_data, _curr_len);
982 *_end_ptr = *_data_ptr + _curr_len;
983 _curr_env->Deallocate(_curr_data);
984 }
985 }
986 };
987
988 bool JvmtiExport::_should_post_class_file_load_hook = false;
989
990 // this entry is for class file load hook on class load, redefine and retransform
991 bool JvmtiExport::post_class_file_load_hook(Symbol* h_name,
992 Handle class_loader,
993 Handle h_protection_domain,
994 unsigned char **data_ptr,
995 unsigned char **end_ptr,
996 JvmtiCachedClassFileData **cache_ptr) {
997 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) {
998 return false;
999 }
1000
1001 JvmtiClassFileLoadHookPoster poster(h_name, class_loader,
1002 h_protection_domain,
1003 data_ptr, end_ptr,
1004 cache_ptr);
1005 poster.post();
1006 return poster.has_been_modified();
1007 }
1008
1009 void JvmtiExport::report_unsupported(bool on) {
1010 // If any JVMTI service is turned on, we need to exit before native code
1011 // tries to access nonexistant services.
1012 if (on) {
1013 vm_exit_during_initialization("Java Kernel does not support JVMTI.");
1014 }
1015 }
1016
1017
1018 static inline Klass* oop_to_klass(oop obj) {
1019 Klass* k = obj->klass();
1020
1021 // if the object is a java.lang.Class then return the java mirror
1022 if (k == SystemDictionary::Class_klass()) {
1023 if (!java_lang_Class::is_primitive(obj)) {
1024 k = java_lang_Class::as_Klass(obj);
1025 assert(k != NULL, "class for non-primitive mirror must exist");
1026 }
1027 }
1028 return k;
1029 }
1030
1031 class JvmtiObjectAllocEventMark : public JvmtiClassEventMark {
1032 private:
1033 jobject _jobj;
1034 jlong _size;
1035 public:
1036 JvmtiObjectAllocEventMark(JavaThread *thread, oop obj) : JvmtiClassEventMark(thread, oop_to_klass(obj)) {
1037 _jobj = (jobject)to_jobject(obj);
1038 _size = obj->size() * wordSize;
1039 };
1040 jobject jni_jobject() { return _jobj; }
1041 jlong size() { return _size; }
1042 };
1043
1044 class JvmtiCompiledMethodLoadEventMark : public JvmtiMethodEventMark {
1045 private:
1046 jint _code_size;
1047 const void *_code_data;
1048 jint _map_length;
1049 jvmtiAddrLocationMap *_map;
1050 const void *_compile_info;
1051 public:
1052 JvmtiCompiledMethodLoadEventMark(JavaThread *thread, nmethod *nm, void* compile_info_ptr = NULL)
1053 : JvmtiMethodEventMark(thread,methodHandle(thread, nm->method())) {
1054 _code_data = nm->insts_begin();
1055 _code_size = nm->insts_size();
1056 _compile_info = compile_info_ptr; // Set void pointer of compiledMethodLoad Event. Default value is NULL.
1057 JvmtiCodeBlobEvents::build_jvmti_addr_location_map(nm, &_map, &_map_length);
1058 }
1059 ~JvmtiCompiledMethodLoadEventMark() {
1060 FREE_C_HEAP_ARRAY(jvmtiAddrLocationMap, _map);
1061 }
1062
1063 jint code_size() { return _code_size; }
1064 const void *code_data() { return _code_data; }
1065 jint map_length() { return _map_length; }
1066 const jvmtiAddrLocationMap* map() { return _map; }
1067 const void *compile_info() { return _compile_info; }
1068 };
1069
1070
1071
1072 class JvmtiMonitorEventMark : public JvmtiThreadEventMark {
1073 private:
1074 jobject _jobj;
1075 public:
1076 JvmtiMonitorEventMark(JavaThread *thread, oop object)
1077 : JvmtiThreadEventMark(thread){
1078 _jobj = to_jobject(object);
1079 }
1080 jobject jni_object() { return _jobj; }
1081 };
1082
1083 ///////////////////////////////////////////////////////////////
1084 //
1085 // pending CompiledMethodUnload support
1086 //
1087
1088 void JvmtiExport::post_compiled_method_unload(
1089 jmethodID method, const void *code_begin) {
1090 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) {
1091 return;
1092 }
1093 JavaThread* thread = JavaThread::current();
1094 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_UNLOAD,
1095 ("[%s] method compile unload event triggered",
1096 JvmtiTrace::safe_get_thread_name(thread)));
1097
1098 // post the event for each environment that has this event enabled.
1099 JvmtiEnvIterator it;
1100 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1101 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_UNLOAD)) {
1102 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) {
1103 continue;
1104 }
1105 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_UNLOAD,
1106 ("[%s] class compile method unload event sent jmethodID " PTR_FORMAT,
1107 JvmtiTrace::safe_get_thread_name(thread), p2i(method)));
1108
1109 ResourceMark rm(thread);
1110
1111 JvmtiEventMark jem(thread);
1112 JvmtiJavaThreadEventTransition jet(thread);
1113 jvmtiEventCompiledMethodUnload callback = env->callbacks()->CompiledMethodUnload;
1114 if (callback != NULL) {
1115 (*callback)(env->jvmti_external(), method, code_begin);
1116 }
1117 }
1118 }
1119 }
1120
1121 ///////////////////////////////////////////////////////////////
1122 //
1123 // JvmtiExport
1124 //
1125
1126 void JvmtiExport::post_raw_breakpoint(JavaThread *thread, Method* method, address location) {
1127 HandleMark hm(thread);
1128 methodHandle mh(thread, method);
1129
1130 JvmtiThreadState *state = thread->jvmti_thread_state();
1131 if (state == NULL) {
1132 return;
1133 }
1134 EVT_TRIG_TRACE(JVMTI_EVENT_BREAKPOINT, ("[%s] Trg Breakpoint triggered",
1135 JvmtiTrace::safe_get_thread_name(thread)));
1136 JvmtiEnvThreadStateIterator it(state);
1137 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1138 ets->compare_and_set_current_location(mh(), location, JVMTI_EVENT_BREAKPOINT);
1139 if (!ets->breakpoint_posted() && ets->is_enabled(JVMTI_EVENT_BREAKPOINT)) {
1140 ThreadState old_os_state = thread->osthread()->get_state();
1141 thread->osthread()->set_state(BREAKPOINTED);
1142 EVT_TRACE(JVMTI_EVENT_BREAKPOINT, ("[%s] Evt Breakpoint sent %s.%s @ " INTX_FORMAT,
1143 JvmtiTrace::safe_get_thread_name(thread),
1144 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1145 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1146 location - mh()->code_base() ));
1147
1148 JvmtiEnv *env = ets->get_env();
1149 JvmtiLocationEventMark jem(thread, mh, location);
1150 JvmtiJavaThreadEventTransition jet(thread);
1151 jvmtiEventBreakpoint callback = env->callbacks()->Breakpoint;
1152 if (callback != NULL) {
1153 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1154 jem.jni_methodID(), jem.location());
1155 }
1156
1157 ets->set_breakpoint_posted();
1158 thread->osthread()->set_state(old_os_state);
1159 }
1160 }
1161 }
1162
1163 //////////////////////////////////////////////////////////////////////////////
1164
1165 bool JvmtiExport::_can_get_source_debug_extension = false;
1166 bool JvmtiExport::_can_maintain_original_method_order = false;
1167 bool JvmtiExport::_can_post_interpreter_events = false;
1168 bool JvmtiExport::_can_post_on_exceptions = false;
1169 bool JvmtiExport::_can_post_breakpoint = false;
1170 bool JvmtiExport::_can_post_field_access = false;
1171 bool JvmtiExport::_can_post_field_modification = false;
1172 bool JvmtiExport::_can_post_method_entry = false;
1173 bool JvmtiExport::_can_post_method_exit = false;
1174 bool JvmtiExport::_can_pop_frame = false;
1175 bool JvmtiExport::_can_force_early_return = false;
1176
1177 bool JvmtiExport::_early_vmstart_recorded = false;
1178
1179 bool JvmtiExport::_should_post_single_step = false;
1180 bool JvmtiExport::_should_post_field_access = false;
1181 bool JvmtiExport::_should_post_field_modification = false;
1182 bool JvmtiExport::_should_post_class_load = false;
1183 bool JvmtiExport::_should_post_class_prepare = false;
1184 bool JvmtiExport::_should_post_class_unload = false;
1185 bool JvmtiExport::_should_post_thread_life = false;
1186 bool JvmtiExport::_should_clean_up_heap_objects = false;
1187 bool JvmtiExport::_should_post_native_method_bind = false;
1188 bool JvmtiExport::_should_post_dynamic_code_generated = false;
1189 bool JvmtiExport::_should_post_data_dump = false;
1190 bool JvmtiExport::_should_post_compiled_method_load = false;
1191 bool JvmtiExport::_should_post_compiled_method_unload = false;
1192 bool JvmtiExport::_should_post_monitor_contended_enter = false;
1193 bool JvmtiExport::_should_post_monitor_contended_entered = false;
1194 bool JvmtiExport::_should_post_monitor_wait = false;
1195 bool JvmtiExport::_should_post_monitor_waited = false;
1196 bool JvmtiExport::_should_post_garbage_collection_start = false;
1197 bool JvmtiExport::_should_post_garbage_collection_finish = false;
1198 bool JvmtiExport::_should_post_object_free = false;
1199 bool JvmtiExport::_should_post_resource_exhausted = false;
1200 bool JvmtiExport::_should_post_vm_object_alloc = false;
1201 bool JvmtiExport::_should_post_sampled_object_alloc = false;
1202 bool JvmtiExport::_should_post_on_exceptions = false;
1203
1204 ////////////////////////////////////////////////////////////////////////////////////////////////
1205
1206
1207 //
1208 // JVMTI single step management
1209 //
1210 void JvmtiExport::at_single_stepping_point(JavaThread *thread, Method* method, address location) {
1211 assert(JvmtiExport::should_post_single_step(), "must be single stepping");
1212
1213 HandleMark hm(thread);
1214 methodHandle mh(thread, method);
1215
1216 // update information about current location and post a step event
1217 JvmtiThreadState *state = thread->jvmti_thread_state();
1218 if (state == NULL) {
1219 return;
1220 }
1221 EVT_TRIG_TRACE(JVMTI_EVENT_SINGLE_STEP, ("[%s] Trg Single Step triggered",
1222 JvmtiTrace::safe_get_thread_name(thread)));
1223 if (!state->hide_single_stepping()) {
1224 if (state->is_pending_step_for_popframe()) {
1225 state->process_pending_step_for_popframe();
1226 }
1227 if (state->is_pending_step_for_earlyret()) {
1228 state->process_pending_step_for_earlyret();
1229 }
1230 JvmtiExport::post_single_step(thread, mh(), location);
1231 }
1232 }
1233
1234
1235 void JvmtiExport::expose_single_stepping(JavaThread *thread) {
1236 JvmtiThreadState *state = thread->jvmti_thread_state();
1237 if (state != NULL) {
1238 state->clear_hide_single_stepping();
1239 }
1240 }
1241
1242
1243 bool JvmtiExport::hide_single_stepping(JavaThread *thread) {
1244 JvmtiThreadState *state = thread->jvmti_thread_state();
1245 if (state != NULL && state->is_enabled(JVMTI_EVENT_SINGLE_STEP)) {
1246 state->set_hide_single_stepping();
1247 return true;
1248 } else {
1249 return false;
1250 }
1251 }
1252
1253 void JvmtiExport::post_class_load(JavaThread *thread, Klass* klass) {
1254 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) {
1255 return;
1256 }
1257 HandleMark hm(thread);
1258
1259 EVT_TRIG_TRACE(JVMTI_EVENT_CLASS_LOAD, ("[%s] Trg Class Load triggered",
1260 JvmtiTrace::safe_get_thread_name(thread)));
1261 JvmtiThreadState* state = thread->jvmti_thread_state();
1262 if (state == NULL) {
1263 return;
1264 }
1265 JvmtiEnvThreadStateIterator it(state);
1266 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1267 if (ets->is_enabled(JVMTI_EVENT_CLASS_LOAD)) {
1268 JvmtiEnv *env = ets->get_env();
1269 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) {
1270 continue;
1271 }
1272 EVT_TRACE(JVMTI_EVENT_CLASS_LOAD, ("[%s] Evt Class Load sent %s",
1273 JvmtiTrace::safe_get_thread_name(thread),
1274 klass==NULL? "NULL" : klass->external_name() ));
1275 JvmtiClassEventMark jem(thread, klass);
1276 JvmtiJavaThreadEventTransition jet(thread);
1277 jvmtiEventClassLoad callback = env->callbacks()->ClassLoad;
1278 if (callback != NULL) {
1279 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_class());
1280 }
1281 }
1282 }
1283 }
1284
1285
1286 void JvmtiExport::post_class_prepare(JavaThread *thread, Klass* klass) {
1287 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) {
1288 return;
1289 }
1290 HandleMark hm(thread);
1291
1292 EVT_TRIG_TRACE(JVMTI_EVENT_CLASS_PREPARE, ("[%s] Trg Class Prepare triggered",
1293 JvmtiTrace::safe_get_thread_name(thread)));
1294 JvmtiThreadState* state = thread->jvmti_thread_state();
1295 if (state == NULL) {
1296 return;
1297 }
1298 JvmtiEnvThreadStateIterator it(state);
1299 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1300 if (ets->is_enabled(JVMTI_EVENT_CLASS_PREPARE)) {
1301 JvmtiEnv *env = ets->get_env();
1302 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) {
1303 continue;
1304 }
1305 EVT_TRACE(JVMTI_EVENT_CLASS_PREPARE, ("[%s] Evt Class Prepare sent %s",
1306 JvmtiTrace::safe_get_thread_name(thread),
1307 klass==NULL? "NULL" : klass->external_name() ));
1308 JvmtiClassEventMark jem(thread, klass);
1309 JvmtiJavaThreadEventTransition jet(thread);
1310 jvmtiEventClassPrepare callback = env->callbacks()->ClassPrepare;
1311 if (callback != NULL) {
1312 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_class());
1313 }
1314 }
1315 }
1316 }
1317
1318 void JvmtiExport::post_class_unload(Klass* klass) {
1319 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) {
1320 return;
1321 }
1322 Thread *thread = Thread::current();
1323 HandleMark hm(thread);
1324
1325 EVT_TRIG_TRACE(EXT_EVENT_CLASS_UNLOAD, ("[?] Trg Class Unload triggered" ));
1326 if (JvmtiEventController::is_enabled((jvmtiEvent)EXT_EVENT_CLASS_UNLOAD)) {
1327 assert(thread->is_VM_thread(), "wrong thread");
1328
1329 // get JavaThread for whom we are proxy
1330 Thread *calling_thread = ((VMThread *)thread)->vm_operation()->calling_thread();
1331 if (!calling_thread->is_Java_thread()) {
1332 // cannot post an event to a non-JavaThread
1333 return;
1334 }
1335 JavaThread *real_thread = (JavaThread *)calling_thread;
1336
1337 JvmtiEnvIterator it;
1338 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1339 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) {
1340 continue;
1341 }
1342 if (env->is_enabled((jvmtiEvent)EXT_EVENT_CLASS_UNLOAD)) {
1343 EVT_TRACE(EXT_EVENT_CLASS_UNLOAD, ("[?] Evt Class Unload sent %s",
1344 klass==NULL? "NULL" : klass->external_name() ));
1345
1346 // do everything manually, since this is a proxy - needs special care
1347 JNIEnv* jni_env = real_thread->jni_environment();
1348 jthread jt = (jthread)JNIHandles::make_local(real_thread, real_thread->threadObj());
1349 jclass jk = (jclass)JNIHandles::make_local(real_thread, klass->java_mirror());
1350
1351 // Before we call the JVMTI agent, we have to set the state in the
1352 // thread for which we are proxying.
1353 JavaThreadState prev_state = real_thread->thread_state();
1354 assert(((Thread *)real_thread)->is_ConcurrentGC_thread() ||
1355 (real_thread->is_Java_thread() && prev_state == _thread_blocked),
1356 "should be ConcurrentGCThread or JavaThread at safepoint");
1357 real_thread->set_thread_state(_thread_in_native);
1358
1359 jvmtiExtensionEvent callback = env->ext_callbacks()->ClassUnload;
1360 if (callback != NULL) {
1361 (*callback)(env->jvmti_external(), jni_env, jt, jk);
1362 }
1363
1364 assert(real_thread->thread_state() == _thread_in_native,
1365 "JavaThread should be in native");
1366 real_thread->set_thread_state(prev_state);
1367
1368 JNIHandles::destroy_local(jk);
1369 JNIHandles::destroy_local(jt);
1370 }
1371 }
1372 }
1373 }
1374
1375
1376 void JvmtiExport::post_thread_start(JavaThread *thread) {
1377 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) {
1378 return;
1379 }
1380 assert(thread->thread_state() == _thread_in_vm, "must be in vm state");
1381
1382 EVT_TRIG_TRACE(JVMTI_EVENT_THREAD_START, ("[%s] Trg Thread Start event triggered",
1383 JvmtiTrace::safe_get_thread_name(thread)));
1384
1385 // do JVMTI thread initialization (if needed)
1386 JvmtiEventController::thread_started(thread);
1387
1388 // Do not post thread start event for hidden java thread.
1389 if (JvmtiEventController::is_enabled(JVMTI_EVENT_THREAD_START) &&
1390 !thread->is_hidden_from_external_view()) {
1391 JvmtiEnvIterator it;
1392 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1393 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) {
1394 continue;
1395 }
1396 if (env->is_enabled(JVMTI_EVENT_THREAD_START)) {
1397 EVT_TRACE(JVMTI_EVENT_THREAD_START, ("[%s] Evt Thread Start event sent",
1398 JvmtiTrace::safe_get_thread_name(thread) ));
1399
1400 JvmtiThreadEventMark jem(thread);
1401 JvmtiJavaThreadEventTransition jet(thread);
1402 jvmtiEventThreadStart callback = env->callbacks()->ThreadStart;
1403 if (callback != NULL) {
1404 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread());
1405 }
1406 }
1407 }
1408 }
1409 }
1410
1411
1412 void JvmtiExport::post_thread_end(JavaThread *thread) {
1413 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) {
1414 return;
1415 }
1416 EVT_TRIG_TRACE(JVMTI_EVENT_THREAD_END, ("[%s] Trg Thread End event triggered",
1417 JvmtiTrace::safe_get_thread_name(thread)));
1418
1419 JvmtiThreadState *state = thread->jvmti_thread_state();
1420 if (state == NULL) {
1421 return;
1422 }
1423
1424 // Do not post thread end event for hidden java thread.
1425 if (state->is_enabled(JVMTI_EVENT_THREAD_END) &&
1426 !thread->is_hidden_from_external_view()) {
1427
1428 JvmtiEnvThreadStateIterator it(state);
1429 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1430 if (ets->is_enabled(JVMTI_EVENT_THREAD_END)) {
1431 JvmtiEnv *env = ets->get_env();
1432 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) {
1433 continue;
1434 }
1435 EVT_TRACE(JVMTI_EVENT_THREAD_END, ("[%s] Evt Thread End event sent",
1436 JvmtiTrace::safe_get_thread_name(thread) ));
1437
1438 JvmtiThreadEventMark jem(thread);
1439 JvmtiJavaThreadEventTransition jet(thread);
1440 jvmtiEventThreadEnd callback = env->callbacks()->ThreadEnd;
1441 if (callback != NULL) {
1442 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread());
1443 }
1444 }
1445 }
1446 }
1447 }
1448
1449 void JvmtiExport::post_object_free(JvmtiEnv* env, jlong tag) {
1450 assert(SafepointSynchronize::is_at_safepoint(), "must be executed at safepoint");
1451 assert(env->is_enabled(JVMTI_EVENT_OBJECT_FREE), "checking");
1452
1453 EVT_TRIG_TRACE(JVMTI_EVENT_OBJECT_FREE, ("[?] Trg Object Free triggered" ));
1454 EVT_TRACE(JVMTI_EVENT_OBJECT_FREE, ("[?] Evt Object Free sent"));
1455
1456 jvmtiEventObjectFree callback = env->callbacks()->ObjectFree;
1457 if (callback != NULL) {
1458 (*callback)(env->jvmti_external(), tag);
1459 }
1460 }
1461
1462 void JvmtiExport::post_resource_exhausted(jint resource_exhausted_flags, const char* description) {
1463 EVT_TRIG_TRACE(JVMTI_EVENT_RESOURCE_EXHAUSTED, ("Trg resource exhausted event triggered" ));
1464
1465 JvmtiEnvIterator it;
1466 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
1467 if (env->is_enabled(JVMTI_EVENT_RESOURCE_EXHAUSTED)) {
1468 EVT_TRACE(JVMTI_EVENT_RESOURCE_EXHAUSTED, ("Evt resource exhausted event sent" ));
1469
1470 JavaThread *thread = JavaThread::current();
1471 JvmtiThreadEventMark jem(thread);
1472 JvmtiJavaThreadEventTransition jet(thread);
1473 jvmtiEventResourceExhausted callback = env->callbacks()->ResourceExhausted;
1474 if (callback != NULL) {
1475 (*callback)(env->jvmti_external(), jem.jni_env(),
1476 resource_exhausted_flags, NULL, description);
1477 }
1478 }
1479 }
1480 }
1481
1482 void JvmtiExport::post_method_entry(JavaThread *thread, Method* method, frame current_frame) {
1483 HandleMark hm(thread);
1484 methodHandle mh(thread, method);
1485
1486 EVT_TRIG_TRACE(JVMTI_EVENT_METHOD_ENTRY, ("[%s] Trg Method Entry triggered %s.%s",
1487 JvmtiTrace::safe_get_thread_name(thread),
1488 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1489 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1490
1491 JvmtiThreadState* state = thread->jvmti_thread_state();
1492 if (state == NULL || !state->is_interp_only_mode()) {
1493 // for any thread that actually wants method entry, interp_only_mode is set
1494 return;
1495 }
1496
1497 state->incr_cur_stack_depth();
1498
1499 if (state->is_enabled(JVMTI_EVENT_METHOD_ENTRY)) {
1500 JvmtiEnvThreadStateIterator it(state);
1501 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1502 if (ets->is_enabled(JVMTI_EVENT_METHOD_ENTRY)) {
1503 EVT_TRACE(JVMTI_EVENT_METHOD_ENTRY, ("[%s] Evt Method Entry sent %s.%s",
1504 JvmtiTrace::safe_get_thread_name(thread),
1505 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1506 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1507
1508 JvmtiEnv *env = ets->get_env();
1509 JvmtiMethodEventMark jem(thread, mh);
1510 JvmtiJavaThreadEventTransition jet(thread);
1511 jvmtiEventMethodEntry callback = env->callbacks()->MethodEntry;
1512 if (callback != NULL) {
1513 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_methodID());
1514 }
1515 }
1516 }
1517 }
1518 }
1519
1520 void JvmtiExport::post_method_exit(JavaThread *thread, Method* method, frame current_frame) {
1521 HandleMark hm(thread);
1522 methodHandle mh(thread, method);
1523
1524 EVT_TRIG_TRACE(JVMTI_EVENT_METHOD_EXIT, ("[%s] Trg Method Exit triggered %s.%s",
1525 JvmtiTrace::safe_get_thread_name(thread),
1526 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1527 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1528
1529 JvmtiThreadState *state = thread->jvmti_thread_state();
1530 if (state == NULL || !state->is_interp_only_mode()) {
1531 // for any thread that actually wants method exit, interp_only_mode is set
1532 return;
1533 }
1534
1535 // return a flag when a method terminates by throwing an exception
1536 // i.e. if an exception is thrown and it's not caught by the current method
1537 bool exception_exit = state->is_exception_detected() && !state->is_exception_caught();
1538
1539
1540 if (state->is_enabled(JVMTI_EVENT_METHOD_EXIT)) {
1541 Handle result;
1542 jvalue value;
1543 value.j = 0L;
1544
1545 // if the method hasn't been popped because of an exception then we populate
1546 // the return_value parameter for the callback. At this point we only have
1547 // the address of a "raw result" and we just call into the interpreter to
1548 // convert this into a jvalue.
1549 if (!exception_exit) {
1550 oop oop_result;
1551 BasicType type = current_frame.interpreter_frame_result(&oop_result, &value);
1552 if (type == T_OBJECT || type == T_ARRAY) {
1553 result = Handle(thread, oop_result);
1554 }
1555 }
1556
1557 JvmtiEnvThreadStateIterator it(state);
1558 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1559 if (ets->is_enabled(JVMTI_EVENT_METHOD_EXIT)) {
1560 EVT_TRACE(JVMTI_EVENT_METHOD_EXIT, ("[%s] Evt Method Exit sent %s.%s",
1561 JvmtiTrace::safe_get_thread_name(thread),
1562 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1563 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1564
1565 JvmtiEnv *env = ets->get_env();
1566 JvmtiMethodEventMark jem(thread, mh);
1567 if (result.not_null()) {
1568 value.l = JNIHandles::make_local(thread, result());
1569 }
1570 JvmtiJavaThreadEventTransition jet(thread);
1571 jvmtiEventMethodExit callback = env->callbacks()->MethodExit;
1572 if (callback != NULL) {
1573 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1574 jem.jni_methodID(), exception_exit, value);
1575 }
1576 }
1577 }
1578 }
1579
1580 JvmtiEnvThreadStateIterator it(state);
1581 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1582 if (ets->has_frame_pops()) {
1583 int cur_frame_number = state->cur_stack_depth();
1584
1585 if (ets->is_frame_pop(cur_frame_number)) {
1586 // we have a NotifyFramePop entry for this frame.
1587 // now check that this env/thread wants this event
1588 if (ets->is_enabled(JVMTI_EVENT_FRAME_POP)) {
1589 EVT_TRACE(JVMTI_EVENT_FRAME_POP, ("[%s] Evt Frame Pop sent %s.%s",
1590 JvmtiTrace::safe_get_thread_name(thread),
1591 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1592 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
1593
1594 // we also need to issue a frame pop event for this frame
1595 JvmtiEnv *env = ets->get_env();
1596 JvmtiMethodEventMark jem(thread, mh);
1597 JvmtiJavaThreadEventTransition jet(thread);
1598 jvmtiEventFramePop callback = env->callbacks()->FramePop;
1599 if (callback != NULL) {
1600 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1601 jem.jni_methodID(), exception_exit);
1602 }
1603 }
1604 // remove the frame's entry
1605 ets->clear_frame_pop(cur_frame_number);
1606 }
1607 }
1608 }
1609
1610 state->decr_cur_stack_depth();
1611 }
1612
1613
1614 // Todo: inline this for optimization
1615 void JvmtiExport::post_single_step(JavaThread *thread, Method* method, address location) {
1616 HandleMark hm(thread);
1617 methodHandle mh(thread, method);
1618
1619 JvmtiThreadState *state = thread->jvmti_thread_state();
1620 if (state == NULL) {
1621 return;
1622 }
1623 JvmtiEnvThreadStateIterator it(state);
1624 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1625 ets->compare_and_set_current_location(mh(), location, JVMTI_EVENT_SINGLE_STEP);
1626 if (!ets->single_stepping_posted() && ets->is_enabled(JVMTI_EVENT_SINGLE_STEP)) {
1627 EVT_TRACE(JVMTI_EVENT_SINGLE_STEP, ("[%s] Evt Single Step sent %s.%s @ " INTX_FORMAT,
1628 JvmtiTrace::safe_get_thread_name(thread),
1629 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1630 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1631 location - mh()->code_base() ));
1632
1633 JvmtiEnv *env = ets->get_env();
1634 JvmtiLocationEventMark jem(thread, mh, location);
1635 JvmtiJavaThreadEventTransition jet(thread);
1636 jvmtiEventSingleStep callback = env->callbacks()->SingleStep;
1637 if (callback != NULL) {
1638 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1639 jem.jni_methodID(), jem.location());
1640 }
1641
1642 ets->set_single_stepping_posted();
1643 }
1644 }
1645 }
1646
1647 void JvmtiExport::post_exception_throw(JavaThread *thread, Method* method, address location, oop exception) {
1648 HandleMark hm(thread);
1649 methodHandle mh(thread, method);
1650 Handle exception_handle(thread, exception);
1651
1652 JvmtiThreadState *state = thread->jvmti_thread_state();
1653 if (state == NULL) {
1654 return;
1655 }
1656
1657 EVT_TRIG_TRACE(JVMTI_EVENT_EXCEPTION, ("[%s] Trg Exception thrown triggered",
1658 JvmtiTrace::safe_get_thread_name(thread)));
1659 if (!state->is_exception_detected()) {
1660 state->set_exception_detected();
1661 JvmtiEnvThreadStateIterator it(state);
1662 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1663 if (ets->is_enabled(JVMTI_EVENT_EXCEPTION) && (exception != NULL)) {
1664
1665 EVT_TRACE(JVMTI_EVENT_EXCEPTION,
1666 ("[%s] Evt Exception thrown sent %s.%s @ " INTX_FORMAT,
1667 JvmtiTrace::safe_get_thread_name(thread),
1668 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1669 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1670 location - mh()->code_base() ));
1671
1672 JvmtiEnv *env = ets->get_env();
1673 JvmtiExceptionEventMark jem(thread, mh, location, exception_handle);
1674
1675 // It's okay to clear these exceptions here because we duplicate
1676 // this lookup in InterpreterRuntime::exception_handler_for_exception.
1677 EXCEPTION_MARK;
1678
1679 bool should_repeat;
1680 vframeStream st(thread);
1681 assert(!st.at_end(), "cannot be at end");
1682 Method* current_method = NULL;
1683 // A GC may occur during the Method::fast_exception_handler_bci_for()
1684 // call below if it needs to load the constraint class. Using a
1685 // methodHandle to keep the 'current_method' from being deallocated
1686 // if GC happens.
1687 methodHandle current_mh = methodHandle(thread, current_method);
1688 int current_bci = -1;
1689 do {
1690 current_method = st.method();
1691 current_mh = methodHandle(thread, current_method);
1692 current_bci = st.bci();
1693 do {
1694 should_repeat = false;
1695 Klass* eh_klass = exception_handle()->klass();
1696 current_bci = Method::fast_exception_handler_bci_for(
1697 current_mh, eh_klass, current_bci, THREAD);
1698 if (HAS_PENDING_EXCEPTION) {
1699 exception_handle = Handle(thread, PENDING_EXCEPTION);
1700 CLEAR_PENDING_EXCEPTION;
1701 should_repeat = true;
1702 }
1703 } while (should_repeat && (current_bci != -1));
1704 st.next();
1705 } while ((current_bci < 0) && (!st.at_end()));
1706
1707 jmethodID catch_jmethodID;
1708 if (current_bci < 0) {
1709 catch_jmethodID = 0;
1710 current_bci = 0;
1711 } else {
1712 catch_jmethodID = jem.to_jmethodID(current_mh);
1713 }
1714
1715 JvmtiJavaThreadEventTransition jet(thread);
1716 jvmtiEventException callback = env->callbacks()->Exception;
1717 if (callback != NULL) {
1718 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1719 jem.jni_methodID(), jem.location(),
1720 jem.exception(),
1721 catch_jmethodID, current_bci);
1722 }
1723 }
1724 }
1725 }
1726
1727 // frames may get popped because of this throw, be safe - invalidate cached depth
1728 state->invalidate_cur_stack_depth();
1729 }
1730
1731
1732 void JvmtiExport::notice_unwind_due_to_exception(JavaThread *thread, Method* method, address location, oop exception, bool in_handler_frame) {
1733 HandleMark hm(thread);
1734 methodHandle mh(thread, method);
1735 Handle exception_handle(thread, exception);
1736
1737 JvmtiThreadState *state = thread->jvmti_thread_state();
1738 if (state == NULL) {
1739 return;
1740 }
1741 EVT_TRIG_TRACE(JVMTI_EVENT_EXCEPTION_CATCH,
1742 ("[%s] Trg unwind_due_to_exception triggered %s.%s @ %s" INTX_FORMAT " - %s",
1743 JvmtiTrace::safe_get_thread_name(thread),
1744 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1745 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1746 location==0? "no location:" : "",
1747 location==0? 0 : location - mh()->code_base(),
1748 in_handler_frame? "in handler frame" : "not handler frame" ));
1749
1750 if (state->is_exception_detected()) {
1751
1752 state->invalidate_cur_stack_depth();
1753 if (!in_handler_frame) {
1754 // Not in exception handler.
1755 if(state->is_interp_only_mode()) {
1756 // method exit and frame pop events are posted only in interp mode.
1757 // When these events are enabled code should be in running in interp mode.
1758 JvmtiExport::post_method_exit(thread, method, thread->last_frame());
1759 // The cached cur_stack_depth might have changed from the
1760 // operations of frame pop or method exit. We are not 100% sure
1761 // the cached cur_stack_depth is still valid depth so invalidate
1762 // it.
1763 state->invalidate_cur_stack_depth();
1764 }
1765 } else {
1766 // In exception handler frame. Report exception catch.
1767 assert(location != NULL, "must be a known location");
1768 // Update cur_stack_depth - the frames above the current frame
1769 // have been unwound due to this exception:
1770 assert(!state->is_exception_caught(), "exception must not be caught yet.");
1771 state->set_exception_caught();
1772
1773 JvmtiEnvThreadStateIterator it(state);
1774 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1775 if (ets->is_enabled(JVMTI_EVENT_EXCEPTION_CATCH) && (exception_handle() != NULL)) {
1776 EVT_TRACE(JVMTI_EVENT_EXCEPTION_CATCH,
1777 ("[%s] Evt ExceptionCatch sent %s.%s @ " INTX_FORMAT,
1778 JvmtiTrace::safe_get_thread_name(thread),
1779 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1780 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1781 location - mh()->code_base() ));
1782
1783 JvmtiEnv *env = ets->get_env();
1784 JvmtiExceptionEventMark jem(thread, mh, location, exception_handle);
1785 JvmtiJavaThreadEventTransition jet(thread);
1786 jvmtiEventExceptionCatch callback = env->callbacks()->ExceptionCatch;
1787 if (callback != NULL) {
1788 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1789 jem.jni_methodID(), jem.location(),
1790 jem.exception());
1791 }
1792 }
1793 }
1794 }
1795 }
1796 }
1797
1798 oop JvmtiExport::jni_GetField_probe(JavaThread *thread, jobject jobj, oop obj,
1799 Klass* klass, jfieldID fieldID, bool is_static) {
1800 if (*((int *)get_field_access_count_addr()) > 0 && thread->has_last_Java_frame()) {
1801 // At least one field access watch is set so we have more work
1802 // to do. This wrapper is used by entry points that allow us
1803 // to create handles in post_field_access_by_jni().
1804 post_field_access_by_jni(thread, obj, klass, fieldID, is_static);
1805 // event posting can block so refetch oop if we were passed a jobj
1806 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj);
1807 }
1808 return obj;
1809 }
1810
1811 oop JvmtiExport::jni_GetField_probe_nh(JavaThread *thread, jobject jobj, oop obj,
1812 Klass* klass, jfieldID fieldID, bool is_static) {
1813 if (*((int *)get_field_access_count_addr()) > 0 && thread->has_last_Java_frame()) {
1814 // At least one field access watch is set so we have more work
1815 // to do. This wrapper is used by "quick" entry points that don't
1816 // allow us to create handles in post_field_access_by_jni(). We
1817 // override that with a ResetNoHandleMark.
1818 ResetNoHandleMark rnhm;
1819 post_field_access_by_jni(thread, obj, klass, fieldID, is_static);
1820 // event posting can block so refetch oop if we were passed a jobj
1821 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj);
1822 }
1823 return obj;
1824 }
1825
1826 void JvmtiExport::post_field_access_by_jni(JavaThread *thread, oop obj,
1827 Klass* klass, jfieldID fieldID, bool is_static) {
1828 // We must be called with a Java context in order to provide reasonable
1829 // values for the klazz, method, and location fields. The callers of this
1830 // function don't make the call unless there is a Java context.
1831 assert(thread->has_last_Java_frame(), "must be called with a Java context");
1832
1833 ResourceMark rm;
1834 fieldDescriptor fd;
1835 // if get_field_descriptor finds fieldID to be invalid, then we just bail
1836 bool valid_fieldID = JvmtiEnv::get_field_descriptor(klass, fieldID, &fd);
1837 assert(valid_fieldID == true,"post_field_access_by_jni called with invalid fieldID");
1838 if (!valid_fieldID) return;
1839 // field accesses are not watched so bail
1840 if (!fd.is_field_access_watched()) return;
1841
1842 HandleMark hm(thread);
1843 Handle h_obj;
1844 if (!is_static) {
1845 // non-static field accessors have an object, but we need a handle
1846 assert(obj != NULL, "non-static needs an object");
1847 h_obj = Handle(thread, obj);
1848 }
1849 post_field_access(thread,
1850 thread->last_frame().interpreter_frame_method(),
1851 thread->last_frame().interpreter_frame_bcp(),
1852 klass, h_obj, fieldID);
1853 }
1854
1855 void JvmtiExport::post_field_access(JavaThread *thread, Method* method,
1856 address location, Klass* field_klass, Handle object, jfieldID field) {
1857
1858 HandleMark hm(thread);
1859 methodHandle mh(thread, method);
1860
1861 JvmtiThreadState *state = thread->jvmti_thread_state();
1862 if (state == NULL) {
1863 return;
1864 }
1865 EVT_TRIG_TRACE(JVMTI_EVENT_FIELD_ACCESS, ("[%s] Trg Field Access event triggered",
1866 JvmtiTrace::safe_get_thread_name(thread)));
1867 JvmtiEnvThreadStateIterator it(state);
1868 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
1869 if (ets->is_enabled(JVMTI_EVENT_FIELD_ACCESS)) {
1870 EVT_TRACE(JVMTI_EVENT_FIELD_ACCESS, ("[%s] Evt Field Access event sent %s.%s @ " INTX_FORMAT,
1871 JvmtiTrace::safe_get_thread_name(thread),
1872 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
1873 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
1874 location - mh()->code_base() ));
1875
1876 JvmtiEnv *env = ets->get_env();
1877 JvmtiLocationEventMark jem(thread, mh, location);
1878 jclass field_jclass = jem.to_jclass(field_klass);
1879 jobject field_jobject = jem.to_jobject(object());
1880 JvmtiJavaThreadEventTransition jet(thread);
1881 jvmtiEventFieldAccess callback = env->callbacks()->FieldAccess;
1882 if (callback != NULL) {
1883 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
1884 jem.jni_methodID(), jem.location(),
1885 field_jclass, field_jobject, field);
1886 }
1887 }
1888 }
1889 }
1890
1891 oop JvmtiExport::jni_SetField_probe(JavaThread *thread, jobject jobj, oop obj,
1892 Klass* klass, jfieldID fieldID, bool is_static,
1893 char sig_type, jvalue *value) {
1894 if (*((int *)get_field_modification_count_addr()) > 0 && thread->has_last_Java_frame()) {
1895 // At least one field modification watch is set so we have more work
1896 // to do. This wrapper is used by entry points that allow us
1897 // to create handles in post_field_modification_by_jni().
1898 post_field_modification_by_jni(thread, obj, klass, fieldID, is_static, sig_type, value);
1899 // event posting can block so refetch oop if we were passed a jobj
1900 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj);
1901 }
1902 return obj;
1903 }
1904
1905 oop JvmtiExport::jni_SetField_probe_nh(JavaThread *thread, jobject jobj, oop obj,
1906 Klass* klass, jfieldID fieldID, bool is_static,
1907 char sig_type, jvalue *value) {
1908 if (*((int *)get_field_modification_count_addr()) > 0 && thread->has_last_Java_frame()) {
1909 // At least one field modification watch is set so we have more work
1910 // to do. This wrapper is used by "quick" entry points that don't
1911 // allow us to create handles in post_field_modification_by_jni(). We
1912 // override that with a ResetNoHandleMark.
1913 ResetNoHandleMark rnhm;
1914 post_field_modification_by_jni(thread, obj, klass, fieldID, is_static, sig_type, value);
1915 // event posting can block so refetch oop if we were passed a jobj
1916 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj);
1917 }
1918 return obj;
1919 }
1920
1921 void JvmtiExport::post_field_modification_by_jni(JavaThread *thread, oop obj,
1922 Klass* klass, jfieldID fieldID, bool is_static,
1923 char sig_type, jvalue *value) {
1924 // We must be called with a Java context in order to provide reasonable
1925 // values for the klazz, method, and location fields. The callers of this
1926 // function don't make the call unless there is a Java context.
1927 assert(thread->has_last_Java_frame(), "must be called with Java context");
1928
1929 ResourceMark rm;
1930 fieldDescriptor fd;
1931 // if get_field_descriptor finds fieldID to be invalid, then we just bail
1932 bool valid_fieldID = JvmtiEnv::get_field_descriptor(klass, fieldID, &fd);
1933 assert(valid_fieldID == true,"post_field_modification_by_jni called with invalid fieldID");
1934 if (!valid_fieldID) return;
1935 // field modifications are not watched so bail
1936 if (!fd.is_field_modification_watched()) return;
1937
1938 HandleMark hm(thread);
1939
1940 Handle h_obj;
1941 if (!is_static) {
1942 // non-static field accessors have an object, but we need a handle
1943 assert(obj != NULL, "non-static needs an object");
1944 h_obj = Handle(thread, obj);
1945 }
1946 post_field_modification(thread,
1947 thread->last_frame().interpreter_frame_method(),
1948 thread->last_frame().interpreter_frame_bcp(),
1949 klass, h_obj, fieldID, sig_type, value);
1950 }
1951
1952 void JvmtiExport::post_raw_field_modification(JavaThread *thread, Method* method,
1953 address location, Klass* field_klass, Handle object, jfieldID field,
1954 char sig_type, jvalue *value) {
1955
1956 if (sig_type == 'I' || sig_type == 'Z' || sig_type == 'B' || sig_type == 'C' || sig_type == 'S') {
1957 // 'I' instructions are used for byte, char, short and int.
1958 // determine which it really is, and convert
1959 fieldDescriptor fd;
1960 bool found = JvmtiEnv::get_field_descriptor(field_klass, field, &fd);
1961 // should be found (if not, leave as is)
1962 if (found) {
1963 jint ival = value->i;
1964 // convert value from int to appropriate type
1965 switch (fd.field_type()) {
1966 case T_BOOLEAN:
1967 sig_type = 'Z';
1968 value->i = 0; // clear it
1969 value->z = (jboolean)ival;
1970 break;
1971 case T_BYTE:
1972 sig_type = 'B';
1973 value->i = 0; // clear it
1974 value->b = (jbyte)ival;
1975 break;
1976 case T_CHAR:
1977 sig_type = 'C';
1978 value->i = 0; // clear it
1979 value->c = (jchar)ival;
1980 break;
1981 case T_SHORT:
1982 sig_type = 'S';
1983 value->i = 0; // clear it
1984 value->s = (jshort)ival;
1985 break;
1986 case T_INT:
1987 // nothing to do
1988 break;
1989 default:
1990 // this is an integer instruction, should be one of above
1991 ShouldNotReachHere();
1992 break;
1993 }
1994 }
1995 }
1996
1997 assert(sig_type != '[', "array should have sig_type == 'L'");
1998 bool handle_created = false;
1999
2000 // convert oop to JNI handle.
2001 if (sig_type == 'L') {
2002 handle_created = true;
2003 value->l = (jobject)JNIHandles::make_local(thread, (oop)value->l);
2004 }
2005
2006 post_field_modification(thread, method, location, field_klass, object, field, sig_type, value);
2007
2008 // Destroy the JNI handle allocated above.
2009 if (handle_created) {
2010 JNIHandles::destroy_local(value->l);
2011 }
2012 }
2013
2014 void JvmtiExport::post_field_modification(JavaThread *thread, Method* method,
2015 address location, Klass* field_klass, Handle object, jfieldID field,
2016 char sig_type, jvalue *value_ptr) {
2017
2018 HandleMark hm(thread);
2019 methodHandle mh(thread, method);
2020
2021 JvmtiThreadState *state = thread->jvmti_thread_state();
2022 if (state == NULL) {
2023 return;
2024 }
2025 EVT_TRIG_TRACE(JVMTI_EVENT_FIELD_MODIFICATION,
2026 ("[%s] Trg Field Modification event triggered",
2027 JvmtiTrace::safe_get_thread_name(thread)));
2028
2029 JvmtiEnvThreadStateIterator it(state);
2030 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
2031 if (ets->is_enabled(JVMTI_EVENT_FIELD_MODIFICATION)) {
2032 EVT_TRACE(JVMTI_EVENT_FIELD_MODIFICATION,
2033 ("[%s] Evt Field Modification event sent %s.%s @ " INTX_FORMAT,
2034 JvmtiTrace::safe_get_thread_name(thread),
2035 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
2036 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
2037 location - mh()->code_base() ));
2038
2039 JvmtiEnv *env = ets->get_env();
2040 JvmtiLocationEventMark jem(thread, mh, location);
2041 jclass field_jclass = jem.to_jclass(field_klass);
2042 jobject field_jobject = jem.to_jobject(object());
2043 JvmtiJavaThreadEventTransition jet(thread);
2044 jvmtiEventFieldModification callback = env->callbacks()->FieldModification;
2045 if (callback != NULL) {
2046 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
2047 jem.jni_methodID(), jem.location(),
2048 field_jclass, field_jobject, field, sig_type, *value_ptr);
2049 }
2050 }
2051 }
2052 }
2053
2054 void JvmtiExport::post_native_method_bind(Method* method, address* function_ptr) {
2055 JavaThread* thread = JavaThread::current();
2056 assert(thread->thread_state() == _thread_in_vm, "must be in vm state");
2057
2058 HandleMark hm(thread);
2059 methodHandle mh(thread, method);
2060
2061 EVT_TRIG_TRACE(JVMTI_EVENT_NATIVE_METHOD_BIND, ("[%s] Trg Native Method Bind event triggered",
2062 JvmtiTrace::safe_get_thread_name(thread)));
2063
2064 if (JvmtiEventController::is_enabled(JVMTI_EVENT_NATIVE_METHOD_BIND)) {
2065 JvmtiEnvIterator it;
2066 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
2067 if (env->is_enabled(JVMTI_EVENT_NATIVE_METHOD_BIND)) {
2068 EVT_TRACE(JVMTI_EVENT_NATIVE_METHOD_BIND, ("[%s] Evt Native Method Bind event sent",
2069 JvmtiTrace::safe_get_thread_name(thread) ));
2070
2071 JvmtiMethodEventMark jem(thread, mh);
2072 JvmtiJavaThreadEventTransition jet(thread);
2073 JNIEnv* jni_env = (env->phase() == JVMTI_PHASE_PRIMORDIAL) ? NULL : jem.jni_env();
2074 jvmtiEventNativeMethodBind callback = env->callbacks()->NativeMethodBind;
2075 if (callback != NULL) {
2076 (*callback)(env->jvmti_external(), jni_env, jem.jni_thread(),
2077 jem.jni_methodID(), (void*)(*function_ptr), (void**)function_ptr);
2078 }
2079 }
2080 }
2081 }
2082 }
2083
2084 // Returns a record containing inlining information for the given nmethod
2085 jvmtiCompiledMethodLoadInlineRecord* create_inline_record(nmethod* nm) {
2086 jint numstackframes = 0;
2087 jvmtiCompiledMethodLoadInlineRecord* record = (jvmtiCompiledMethodLoadInlineRecord*)NEW_RESOURCE_OBJ(jvmtiCompiledMethodLoadInlineRecord);
2088 record->header.kind = JVMTI_CMLR_INLINE_INFO;
2089 record->header.next = NULL;
2090 record->header.majorinfoversion = JVMTI_CMLR_MAJOR_VERSION_1;
2091 record->header.minorinfoversion = JVMTI_CMLR_MINOR_VERSION_0;
2092 record->numpcs = 0;
2093 for(PcDesc* p = nm->scopes_pcs_begin(); p < nm->scopes_pcs_end(); p++) {
2094 if(p->scope_decode_offset() == DebugInformationRecorder::serialized_null) continue;
2095 record->numpcs++;
2096 }
2097 record->pcinfo = (PCStackInfo*)(NEW_RESOURCE_ARRAY(PCStackInfo, record->numpcs));
2098 int scope = 0;
2099 for(PcDesc* p = nm->scopes_pcs_begin(); p < nm->scopes_pcs_end(); p++) {
2100 if(p->scope_decode_offset() == DebugInformationRecorder::serialized_null) continue;
2101 void* pc_address = (void*)p->real_pc(nm);
2102 assert(pc_address != NULL, "pc_address must be non-null");
2103 record->pcinfo[scope].pc = pc_address;
2104 numstackframes=0;
2105 for(ScopeDesc* sd = nm->scope_desc_at(p->real_pc(nm));sd != NULL;sd = sd->sender()) {
2106 numstackframes++;
2107 }
2108 assert(numstackframes != 0, "numstackframes must be nonzero.");
2109 record->pcinfo[scope].methods = (jmethodID *)NEW_RESOURCE_ARRAY(jmethodID, numstackframes);
2110 record->pcinfo[scope].bcis = (jint *)NEW_RESOURCE_ARRAY(jint, numstackframes);
2111 record->pcinfo[scope].numstackframes = numstackframes;
2112 int stackframe = 0;
2113 for(ScopeDesc* sd = nm->scope_desc_at(p->real_pc(nm));sd != NULL;sd = sd->sender()) {
2114 // 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()
2115 assert(sd->method() != NULL, "sd->method() cannot be null.");
2116 record->pcinfo[scope].methods[stackframe] = sd->method()->jmethod_id();
2117 record->pcinfo[scope].bcis[stackframe] = sd->bci();
2118 stackframe++;
2119 }
2120 scope++;
2121 }
2122 return record;
2123 }
2124
2125 void JvmtiExport::post_compiled_method_load(nmethod *nm) {
2126 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) {
2127 return;
2128 }
2129 JavaThread* thread = JavaThread::current();
2130
2131 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
2132 ("[%s] method compile load event triggered",
2133 JvmtiTrace::safe_get_thread_name(thread)));
2134
2135 JvmtiEnvIterator it;
2136 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
2137 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_LOAD)) {
2138 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) {
2139 continue;
2140 }
2141 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
2142 ("[%s] class compile method load event sent %s.%s ",
2143 JvmtiTrace::safe_get_thread_name(thread),
2144 (nm->method() == NULL) ? "NULL" : nm->method()->klass_name()->as_C_string(),
2145 (nm->method() == NULL) ? "NULL" : nm->method()->name()->as_C_string()));
2146 ResourceMark rm(thread);
2147 HandleMark hm(thread);
2148
2149 // Add inlining information
2150 jvmtiCompiledMethodLoadInlineRecord* inlinerecord = create_inline_record(nm);
2151 // Pass inlining information through the void pointer
2152 JvmtiCompiledMethodLoadEventMark jem(thread, nm, inlinerecord);
2153 JvmtiJavaThreadEventTransition jet(thread);
2154 jvmtiEventCompiledMethodLoad callback = env->callbacks()->CompiledMethodLoad;
2155 if (callback != NULL) {
2156 (*callback)(env->jvmti_external(), jem.jni_methodID(),
2157 jem.code_size(), jem.code_data(), jem.map_length(),
2158 jem.map(), jem.compile_info());
2159 }
2160 }
2161 }
2162 }
2163
2164
2165 // post a COMPILED_METHOD_LOAD event for a given environment
2166 void JvmtiExport::post_compiled_method_load(JvmtiEnv* env, const jmethodID method, const jint length,
2167 const void *code_begin, const jint map_length,
2168 const jvmtiAddrLocationMap* map)
2169 {
2170 if (env->phase() <= JVMTI_PHASE_PRIMORDIAL) {
2171 return;
2172 }
2173 JavaThread* thread = JavaThread::current();
2174 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
2175 ("[%s] method compile load event triggered (by GenerateEvents)",
2176 JvmtiTrace::safe_get_thread_name(thread)));
2177 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_LOAD)) {
2178
2179 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
2180 ("[%s] class compile method load event sent (by GenerateEvents), jmethodID=" PTR_FORMAT,
2181 JvmtiTrace::safe_get_thread_name(thread), p2i(method)));
2182
2183 JvmtiEventMark jem(thread);
2184 JvmtiJavaThreadEventTransition jet(thread);
2185 jvmtiEventCompiledMethodLoad callback = env->callbacks()->CompiledMethodLoad;
2186 if (callback != NULL) {
2187 (*callback)(env->jvmti_external(), method,
2188 length, code_begin, map_length,
2189 map, NULL);
2190 }
2191 }
2192 }
2193
2194 void JvmtiExport::post_dynamic_code_generated_internal(const char *name, const void *code_begin, const void *code_end) {
2195 assert(name != NULL && name[0] != '\0', "sanity check");
2196
2197 JavaThread* thread = JavaThread::current();
2198 // In theory everyone coming thru here is in_vm but we need to be certain
2199 // because a callee will do a vm->native transition
2200 ThreadInVMfromUnknown __tiv;
2201
2202 EVT_TRIG_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED,
2203 ("[%s] method dynamic code generated event triggered",
2204 JvmtiTrace::safe_get_thread_name(thread)));
2205 JvmtiEnvIterator it;
2206 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
2207 if (env->is_enabled(JVMTI_EVENT_DYNAMIC_CODE_GENERATED)) {
2208 EVT_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED,
2209 ("[%s] dynamic code generated event sent for %s",
2210 JvmtiTrace::safe_get_thread_name(thread), name));
2211 JvmtiEventMark jem(thread);
2212 JvmtiJavaThreadEventTransition jet(thread);
2213 jint length = (jint)pointer_delta(code_end, code_begin, sizeof(char));
2214 jvmtiEventDynamicCodeGenerated callback = env->callbacks()->DynamicCodeGenerated;
2215 if (callback != NULL) {
2216 (*callback)(env->jvmti_external(), name, (void*)code_begin, length);
2217 }
2218 }
2219 }
2220 }
2221
2222 void JvmtiExport::post_dynamic_code_generated(const char *name, const void *code_begin, const void *code_end) {
2223 jvmtiPhase phase = JvmtiEnv::get_phase();
2224 if (phase == JVMTI_PHASE_PRIMORDIAL || phase == JVMTI_PHASE_START) {
2225 post_dynamic_code_generated_internal(name, code_begin, code_end);
2226 } else {
2227 // It may not be safe to post the event from this thread. Defer all
2228 // postings to the service thread so that it can perform them in a safe
2229 // context and in-order.
2230 MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag);
2231 JvmtiDeferredEvent event = JvmtiDeferredEvent::dynamic_code_generated_event(
2232 name, code_begin, code_end);
2233 JvmtiDeferredEventQueue::enqueue(event);
2234 }
2235 }
2236
2237
2238 // post a DYNAMIC_CODE_GENERATED event for a given environment
2239 // used by GenerateEvents
2240 void JvmtiExport::post_dynamic_code_generated(JvmtiEnv* env, const char *name,
2241 const void *code_begin, const void *code_end)
2242 {
2243 JavaThread* thread = JavaThread::current();
2244 EVT_TRIG_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED,
2245 ("[%s] dynamic code generated event triggered (by GenerateEvents)",
2246 JvmtiTrace::safe_get_thread_name(thread)));
2247 if (env->is_enabled(JVMTI_EVENT_DYNAMIC_CODE_GENERATED)) {
2248 EVT_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED,
2249 ("[%s] dynamic code generated event sent for %s",
2250 JvmtiTrace::safe_get_thread_name(thread), name));
2251 JvmtiEventMark jem(thread);
2252 JvmtiJavaThreadEventTransition jet(thread);
2253 jint length = (jint)pointer_delta(code_end, code_begin, sizeof(char));
2254 jvmtiEventDynamicCodeGenerated callback = env->callbacks()->DynamicCodeGenerated;
2255 if (callback != NULL) {
2256 (*callback)(env->jvmti_external(), name, (void*)code_begin, length);
2257 }
2258 }
2259 }
2260
2261 // post a DynamicCodeGenerated event while holding locks in the VM.
2262 void JvmtiExport::post_dynamic_code_generated_while_holding_locks(const char* name,
2263 address code_begin, address code_end)
2264 {
2265 // register the stub with the current dynamic code event collector
2266 JvmtiThreadState* state = JvmtiThreadState::state_for(JavaThread::current());
2267 // state can only be NULL if the current thread is exiting which
2268 // should not happen since we're trying to post an event
2269 guarantee(state != NULL, "attempt to register stub via an exiting thread");
2270 JvmtiDynamicCodeEventCollector* collector = state->get_dynamic_code_event_collector();
2271 guarantee(collector != NULL, "attempt to register stub without event collector");
2272 collector->register_stub(name, code_begin, code_end);
2273 }
2274
2275 // Collect all the vm internally allocated objects which are visible to java world
2276 void JvmtiExport::record_vm_internal_object_allocation(oop obj) {
2277 Thread* thread = Thread::current_or_null();
2278 if (thread != NULL && thread->is_Java_thread()) {
2279 // Can not take safepoint here.
2280 NoSafepointVerifier no_sfpt;
2281 // Can not take safepoint here so can not use state_for to get
2282 // jvmti thread state.
2283 JvmtiThreadState *state = ((JavaThread*)thread)->jvmti_thread_state();
2284 if (state != NULL) {
2285 // state is non NULL when VMObjectAllocEventCollector is enabled.
2286 JvmtiVMObjectAllocEventCollector *collector;
2287 collector = state->get_vm_object_alloc_event_collector();
2288 if (collector != NULL && collector->is_enabled()) {
2289 // Don't record classes as these will be notified via the ClassLoad
2290 // event.
2291 if (obj->klass() != SystemDictionary::Class_klass()) {
2292 collector->record_allocation(obj);
2293 }
2294 }
2295 }
2296 }
2297 }
2298
2299 // Collect all the sampled allocated objects.
2300 void JvmtiExport::record_sampled_internal_object_allocation(oop obj) {
2301 Thread* thread = Thread::current_or_null();
2302 if (thread != NULL && thread->is_Java_thread()) {
2303 // Can not take safepoint here.
2304 NoSafepointVerifier no_sfpt;
2305 // Can not take safepoint here so can not use state_for to get
2306 // jvmti thread state.
2307 JvmtiThreadState *state = ((JavaThread*)thread)->jvmti_thread_state();
2308 if (state != NULL) {
2309 // state is non NULL when SampledObjectAllocEventCollector is enabled.
2310 JvmtiSampledObjectAllocEventCollector *collector;
2311 collector = state->get_sampled_object_alloc_event_collector();
2312
2313 if (collector != NULL && collector->is_enabled()) {
2314 collector->record_allocation(obj);
2315 }
2316 }
2317 }
2318 }
2319
2320 void JvmtiExport::post_garbage_collection_finish() {
2321 Thread *thread = Thread::current(); // this event is posted from VM-Thread.
2322 EVT_TRIG_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH,
2323 ("[%s] garbage collection finish event triggered",
2324 JvmtiTrace::safe_get_thread_name(thread)));
2325 JvmtiEnvIterator it;
2326 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
2327 if (env->is_enabled(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH)) {
2328 EVT_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH,
2329 ("[%s] garbage collection finish event sent",
2330 JvmtiTrace::safe_get_thread_name(thread)));
2331 JvmtiThreadEventTransition jet(thread);
2332 // JNIEnv is NULL here because this event is posted from VM Thread
2333 jvmtiEventGarbageCollectionFinish callback = env->callbacks()->GarbageCollectionFinish;
2334 if (callback != NULL) {
2335 (*callback)(env->jvmti_external());
2336 }
2337 }
2338 }
2339 }
2340
2341 void JvmtiExport::post_garbage_collection_start() {
2342 Thread* thread = Thread::current(); // this event is posted from vm-thread.
2343 EVT_TRIG_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_START,
2344 ("[%s] garbage collection start event triggered",
2345 JvmtiTrace::safe_get_thread_name(thread)));
2346 JvmtiEnvIterator it;
2347 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
2348 if (env->is_enabled(JVMTI_EVENT_GARBAGE_COLLECTION_START)) {
2349 EVT_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_START,
2350 ("[%s] garbage collection start event sent",
2351 JvmtiTrace::safe_get_thread_name(thread)));
2352 JvmtiThreadEventTransition jet(thread);
2353 // JNIEnv is NULL here because this event is posted from VM Thread
2354 jvmtiEventGarbageCollectionStart callback = env->callbacks()->GarbageCollectionStart;
2355 if (callback != NULL) {
2356 (*callback)(env->jvmti_external());
2357 }
2358 }
2359 }
2360 }
2361
2362 void JvmtiExport::post_data_dump() {
2363 Thread *thread = Thread::current();
2364 EVT_TRIG_TRACE(JVMTI_EVENT_DATA_DUMP_REQUEST,
2365 ("[%s] data dump request event triggered",
2366 JvmtiTrace::safe_get_thread_name(thread)));
2367 JvmtiEnvIterator it;
2368 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
2369 if (env->is_enabled(JVMTI_EVENT_DATA_DUMP_REQUEST)) {
2370 EVT_TRACE(JVMTI_EVENT_DATA_DUMP_REQUEST,
2371 ("[%s] data dump request event sent",
2372 JvmtiTrace::safe_get_thread_name(thread)));
2373 JvmtiThreadEventTransition jet(thread);
2374 // JNIEnv is NULL here because this event is posted from VM Thread
2375 jvmtiEventDataDumpRequest callback = env->callbacks()->DataDumpRequest;
2376 if (callback != NULL) {
2377 (*callback)(env->jvmti_external());
2378 }
2379 }
2380 }
2381 }
2382
2383 void JvmtiExport::post_monitor_contended_enter(JavaThread *thread, ObjectMonitor *obj_mntr) {
2384 oop object = (oop)obj_mntr->object();
2385 JvmtiThreadState *state = thread->jvmti_thread_state();
2386 if (state == NULL) {
2387 return;
2388 }
2389
2390 HandleMark hm(thread);
2391 Handle h(thread, object);
2392
2393 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTER,
2394 ("[%s] montior contended enter event triggered",
2395 JvmtiTrace::safe_get_thread_name(thread)));
2396
2397 JvmtiEnvThreadStateIterator it(state);
2398 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
2399 if (ets->is_enabled(JVMTI_EVENT_MONITOR_CONTENDED_ENTER)) {
2400 EVT_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTER,
2401 ("[%s] monitor contended enter event sent",
2402 JvmtiTrace::safe_get_thread_name(thread)));
2403 JvmtiMonitorEventMark jem(thread, h());
2404 JvmtiEnv *env = ets->get_env();
2405 JvmtiThreadEventTransition jet(thread);
2406 jvmtiEventMonitorContendedEnter callback = env->callbacks()->MonitorContendedEnter;
2407 if (callback != NULL) {
2408 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_object());
2409 }
2410 }
2411 }
2412 }
2413
2414 void JvmtiExport::post_monitor_contended_entered(JavaThread *thread, ObjectMonitor *obj_mntr) {
2415 oop object = (oop)obj_mntr->object();
2416 JvmtiThreadState *state = thread->jvmti_thread_state();
2417 if (state == NULL) {
2418 return;
2419 }
2420
2421 HandleMark hm(thread);
2422 Handle h(thread, object);
2423
2424 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED,
2425 ("[%s] montior contended entered event triggered",
2426 JvmtiTrace::safe_get_thread_name(thread)));
2427
2428 JvmtiEnvThreadStateIterator it(state);
2429 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
2430 if (ets->is_enabled(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED)) {
2431 EVT_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED,
2432 ("[%s] monitor contended enter event sent",
2433 JvmtiTrace::safe_get_thread_name(thread)));
2434 JvmtiMonitorEventMark jem(thread, h());
2435 JvmtiEnv *env = ets->get_env();
2436 JvmtiThreadEventTransition jet(thread);
2437 jvmtiEventMonitorContendedEntered callback = env->callbacks()->MonitorContendedEntered;
2438 if (callback != NULL) {
2439 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_object());
2440 }
2441 }
2442 }
2443 }
2444
2445 void JvmtiExport::post_monitor_wait(JavaThread *thread, oop object,
2446 jlong timeout) {
2447 JvmtiThreadState *state = thread->jvmti_thread_state();
2448 if (state == NULL) {
2449 return;
2450 }
2451
2452 HandleMark hm(thread);
2453 Handle h(thread, object);
2454
2455 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_WAIT,
2456 ("[%s] montior wait event triggered",
2457 JvmtiTrace::safe_get_thread_name(thread)));
2458
2459 JvmtiEnvThreadStateIterator it(state);
2460 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
2461 if (ets->is_enabled(JVMTI_EVENT_MONITOR_WAIT)) {
2462 EVT_TRACE(JVMTI_EVENT_MONITOR_WAIT,
2463 ("[%s] monitor wait event sent",
2464 JvmtiTrace::safe_get_thread_name(thread)));
2465 JvmtiMonitorEventMark jem(thread, h());
2466 JvmtiEnv *env = ets->get_env();
2467 JvmtiThreadEventTransition jet(thread);
2468 jvmtiEventMonitorWait callback = env->callbacks()->MonitorWait;
2469 if (callback != NULL) {
2470 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
2471 jem.jni_object(), timeout);
2472 }
2473 }
2474 }
2475 }
2476
2477 void JvmtiExport::post_monitor_waited(JavaThread *thread, ObjectMonitor *obj_mntr, jboolean timed_out) {
2478 oop object = (oop)obj_mntr->object();
2479 JvmtiThreadState *state = thread->jvmti_thread_state();
2480 if (state == NULL) {
2481 return;
2482 }
2483
2484 HandleMark hm(thread);
2485 Handle h(thread, object);
2486
2487 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_WAITED,
2488 ("[%s] montior waited event triggered",
2489 JvmtiTrace::safe_get_thread_name(thread)));
2490
2491 JvmtiEnvThreadStateIterator it(state);
2492 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
2493 if (ets->is_enabled(JVMTI_EVENT_MONITOR_WAITED)) {
2494 EVT_TRACE(JVMTI_EVENT_MONITOR_WAITED,
2495 ("[%s] monitor waited event sent",
2496 JvmtiTrace::safe_get_thread_name(thread)));
2497 JvmtiMonitorEventMark jem(thread, h());
2498 JvmtiEnv *env = ets->get_env();
2499 JvmtiThreadEventTransition jet(thread);
2500 jvmtiEventMonitorWaited callback = env->callbacks()->MonitorWaited;
2501 if (callback != NULL) {
2502 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
2503 jem.jni_object(), timed_out);
2504 }
2505 }
2506 }
2507 }
2508
2509 void JvmtiExport::post_vm_object_alloc(JavaThread *thread, oop object) {
2510 EVT_TRIG_TRACE(JVMTI_EVENT_VM_OBJECT_ALLOC, ("[%s] Trg vm object alloc triggered",
2511 JvmtiTrace::safe_get_thread_name(thread)));
2512 if (object == NULL) {
2513 return;
2514 }
2515 HandleMark hm(thread);
2516 Handle h(thread, object);
2517 JvmtiEnvIterator it;
2518 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
2519 if (env->is_enabled(JVMTI_EVENT_VM_OBJECT_ALLOC)) {
2520 EVT_TRACE(JVMTI_EVENT_VM_OBJECT_ALLOC, ("[%s] Evt vmobject alloc sent %s",
2521 JvmtiTrace::safe_get_thread_name(thread),
2522 object==NULL? "NULL" : object->klass()->external_name()));
2523
2524 JvmtiObjectAllocEventMark jem(thread, h());
2525 JvmtiJavaThreadEventTransition jet(thread);
2526 jvmtiEventVMObjectAlloc callback = env->callbacks()->VMObjectAlloc;
2527 if (callback != NULL) {
2528 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
2529 jem.jni_jobject(), jem.jni_class(), jem.size());
2530 }
2531 }
2532 }
2533 }
2534
2535 void JvmtiExport::post_sampled_object_alloc(JavaThread *thread, oop object) {
2536 EVT_TRIG_TRACE(JVMTI_EVENT_SAMPLED_OBJECT_ALLOC,
2537 ("[%s] Trg sampled object alloc triggered",
2538 JvmtiTrace::safe_get_thread_name(thread)));
2539 if (object == NULL) {
2540 return;
2541 }
2542 HandleMark hm(thread);
2543 Handle h(thread, object);
2544 JvmtiEnvIterator it;
2545 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
2546 if (env->is_enabled(JVMTI_EVENT_SAMPLED_OBJECT_ALLOC)) {
2547 EVT_TRACE(JVMTI_EVENT_SAMPLED_OBJECT_ALLOC,
2548 ("[%s] Evt sampled object alloc sent %s",
2549 JvmtiTrace::safe_get_thread_name(thread),
2550 object == NULL ? "NULL" : object->klass()->external_name()));
2551
2552 JvmtiObjectAllocEventMark jem(thread, h());
2553 JvmtiJavaThreadEventTransition jet(thread);
2554 jvmtiEventSampledObjectAlloc callback = env->callbacks()->SampledObjectAlloc;
2555 if (callback != NULL) {
2556 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
2557 jem.jni_jobject(), jem.jni_class(), jem.size());
2558 }
2559 }
2560 }
2561 }
2562
2563 ////////////////////////////////////////////////////////////////////////////////////////////////
2564
2565 void JvmtiExport::cleanup_thread(JavaThread* thread) {
2566 assert(JavaThread::current() == thread, "thread is not current");
2567 MutexLocker mu(JvmtiThreadState_lock);
2568
2569 if (thread->jvmti_thread_state() != NULL) {
2570 // This has to happen after the thread state is removed, which is
2571 // why it is not in post_thread_end_event like its complement
2572 // Maybe both these functions should be rolled into the posts?
2573 JvmtiEventController::thread_ended(thread);
2574 }
2575 }
2576
2577 void JvmtiExport::clear_detected_exception(JavaThread* thread) {
2578 assert(JavaThread::current() == thread, "thread is not current");
2579
2580 JvmtiThreadState* state = thread->jvmti_thread_state();
2581 if (state != NULL) {
2582 state->clear_exception_state();
2583 }
2584 }
2585
2586 void JvmtiExport::oops_do(OopClosure* f) {
2587 JvmtiCurrentBreakpoints::oops_do(f);
2588 JvmtiObjectAllocEventCollector::oops_do_for_all_threads(f);
2589 }
2590
2591 void JvmtiExport::weak_oops_do(BoolObjectClosure* is_alive, OopClosure* f) {
2592 JvmtiTagMap::weak_oops_do(is_alive, f);
2593 }
2594
2595 void JvmtiExport::gc_epilogue() {
2596 JvmtiCurrentBreakpoints::gc_epilogue();
2597 }
2598
2599 // Onload raw monitor transition.
2600 void JvmtiExport::transition_pending_onload_raw_monitors() {
2601 JvmtiPendingMonitors::transition_raw_monitors();
2602 }
2603
2604 ////////////////////////////////////////////////////////////////////////////////////////////////
2605 #if INCLUDE_SERVICES
2606 // Attach is disabled if SERVICES is not included
2607
2608 // type for the Agent_OnAttach entry point
2609 extern "C" {
2610 typedef jint (JNICALL *OnAttachEntry_t)(JavaVM*, char *, void *);
2611 }
2612
2613 jint JvmtiExport::load_agent_library(const char *agent, const char *absParam,
2614 const char *options, outputStream* st) {
2615 char ebuf[1024] = {0};
2616 char buffer[JVM_MAXPATHLEN];
2617 void* library = NULL;
2618 jint result = JNI_ERR;
2619 const char *on_attach_symbols[] = AGENT_ONATTACH_SYMBOLS;
2620 size_t num_symbol_entries = ARRAY_SIZE(on_attach_symbols);
2621
2622 // The abs paramter should be "true" or "false"
2623 bool is_absolute_path = (absParam != NULL) && (strcmp(absParam,"true")==0);
2624
2625 // Initially marked as invalid. It will be set to valid if we can find the agent
2626 AgentLibrary *agent_lib = new AgentLibrary(agent, options, is_absolute_path, NULL);
2627
2628 // Check for statically linked in agent. If not found then if the path is
2629 // absolute we attempt to load the library. Otherwise we try to load it
2630 // from the standard dll directory.
2631
2632 if (!os::find_builtin_agent(agent_lib, on_attach_symbols, num_symbol_entries)) {
2633 if (is_absolute_path) {
2634 library = os::dll_load(agent, ebuf, sizeof ebuf);
2635 } else {
2636 // Try to load the agent from the standard dll directory
2637 if (os::dll_locate_lib(buffer, sizeof(buffer), Arguments::get_dll_dir(),
2638 agent)) {
2639 library = os::dll_load(buffer, ebuf, sizeof ebuf);
2640 }
2641 if (library == NULL) {
2642 // not found - try OS default library path
2643 if (os::dll_build_name(buffer, sizeof(buffer), agent)) {
2644 library = os::dll_load(buffer, ebuf, sizeof ebuf);
2645 }
2646 }
2647 }
2648 if (library != NULL) {
2649 agent_lib->set_os_lib(library);
2650 agent_lib->set_valid();
2651 }
2652 }
2653 // If the library was loaded then we attempt to invoke the Agent_OnAttach
2654 // function
2655 if (agent_lib->valid()) {
2656 // Lookup the Agent_OnAttach function
2657 OnAttachEntry_t on_attach_entry = NULL;
2658 on_attach_entry = CAST_TO_FN_PTR(OnAttachEntry_t,
2659 os::find_agent_function(agent_lib, false, on_attach_symbols, num_symbol_entries));
2660 if (on_attach_entry == NULL) {
2661 // Agent_OnAttach missing - unload library
2662 if (!agent_lib->is_static_lib()) {
2663 os::dll_unload(library);
2664 }
2665 st->print_cr("%s is not available in %s",
2666 on_attach_symbols[0], agent_lib->name());
2667 delete agent_lib;
2668 } else {
2669 // Invoke the Agent_OnAttach function
2670 JavaThread* THREAD = JavaThread::current();
2671 {
2672 extern struct JavaVM_ main_vm;
2673 JvmtiThreadEventMark jem(THREAD);
2674 JvmtiJavaThreadEventTransition jet(THREAD);
2675
2676 result = (*on_attach_entry)(&main_vm, (char*)options, NULL);
2677 }
2678
2679 // Agent_OnAttach may have used JNI
2680 if (HAS_PENDING_EXCEPTION) {
2681 CLEAR_PENDING_EXCEPTION;
2682 }
2683
2684 // If OnAttach returns JNI_OK then we add it to the list of
2685 // agent libraries so that we can call Agent_OnUnload later.
2686 if (result == JNI_OK) {
2687 Arguments::add_loaded_agent(agent_lib);
2688 } else {
2689 delete agent_lib;
2690 }
2691
2692 // Agent_OnAttach executed so completion status is JNI_OK
2693 st->print_cr("return code: %d", result);
2694 result = JNI_OK;
2695 }
2696 } else {
2697 st->print_cr("%s was not loaded.", agent);
2698 if (*ebuf != '\0') {
2699 st->print_cr("%s", ebuf);
2700 }
2701 }
2702 return result;
2703 }
2704
2705 #endif // INCLUDE_SERVICES
2706 ////////////////////////////////////////////////////////////////////////////////////////////////
2707
2708 // Setup current current thread for event collection.
2709 void JvmtiEventCollector::setup_jvmti_thread_state() {
2710 // set this event collector to be the current one.
2711 JvmtiThreadState* state = JvmtiThreadState::state_for(JavaThread::current());
2712 // state can only be NULL if the current thread is exiting which
2713 // should not happen since we're trying to configure for event collection
2714 guarantee(state != NULL, "exiting thread called setup_jvmti_thread_state");
2715 if (is_vm_object_alloc_event()) {
2716 _prev = state->get_vm_object_alloc_event_collector();
2717 state->set_vm_object_alloc_event_collector((JvmtiVMObjectAllocEventCollector *)this);
2718 } else if (is_dynamic_code_event()) {
2719 _prev = state->get_dynamic_code_event_collector();
2720 state->set_dynamic_code_event_collector((JvmtiDynamicCodeEventCollector *)this);
2721 } else if (is_sampled_object_alloc_event()) {
2722 JvmtiSampledObjectAllocEventCollector *prev = state->get_sampled_object_alloc_event_collector();
2723
2724 if (prev) {
2725 // JvmtiSampledObjectAllocEventCollector wants only one active collector
2726 // enabled. This allows to have a collector detect a user code requiring
2727 // a sample in the callback.
2728 return;
2729 }
2730 state->set_sampled_object_alloc_event_collector((JvmtiSampledObjectAllocEventCollector*) this);
2731 }
2732
2733 _unset_jvmti_thread_state = true;
2734 }
2735
2736 // Unset current event collection in this thread and reset it with previous
2737 // collector.
2738 void JvmtiEventCollector::unset_jvmti_thread_state() {
2739 if (!_unset_jvmti_thread_state) {
2740 return;
2741 }
2742
2743 JvmtiThreadState* state = JavaThread::current()->jvmti_thread_state();
2744 if (state != NULL) {
2745 // restore the previous event collector (if any)
2746 if (is_vm_object_alloc_event()) {
2747 if (state->get_vm_object_alloc_event_collector() == this) {
2748 state->set_vm_object_alloc_event_collector((JvmtiVMObjectAllocEventCollector *)_prev);
2749 } else {
2750 // this thread's jvmti state was created during the scope of
2751 // the event collector.
2752 }
2753 } else if (is_dynamic_code_event()) {
2754 if (state->get_dynamic_code_event_collector() == this) {
2755 state->set_dynamic_code_event_collector((JvmtiDynamicCodeEventCollector *)_prev);
2756 } else {
2757 // this thread's jvmti state was created during the scope of
2758 // the event collector.
2759 }
2760 } else if (is_sampled_object_alloc_event()) {
2761 if (state->get_sampled_object_alloc_event_collector() == this) {
2762 state->set_sampled_object_alloc_event_collector((JvmtiSampledObjectAllocEventCollector*)_prev);
2763 } else {
2764 // this thread's jvmti state was created during the scope of
2765 // the event collector.
2766 }
2767 }
2768 }
2769 }
2770
2771 // create the dynamic code event collector
2772 JvmtiDynamicCodeEventCollector::JvmtiDynamicCodeEventCollector() : _code_blobs(NULL) {
2773 if (JvmtiExport::should_post_dynamic_code_generated()) {
2774 setup_jvmti_thread_state();
2775 }
2776 }
2777
2778 // iterate over any code blob descriptors collected and post a
2779 // DYNAMIC_CODE_GENERATED event to the profiler.
2780 JvmtiDynamicCodeEventCollector::~JvmtiDynamicCodeEventCollector() {
2781 assert(!JavaThread::current()->owns_locks(), "all locks must be released to post deferred events");
2782 // iterate over any code blob descriptors that we collected
2783 if (_code_blobs != NULL) {
2784 for (int i=0; i<_code_blobs->length(); i++) {
2785 JvmtiCodeBlobDesc* blob = _code_blobs->at(i);
2786 JvmtiExport::post_dynamic_code_generated(blob->name(), blob->code_begin(), blob->code_end());
2787 FreeHeap(blob);
2788 }
2789 delete _code_blobs;
2790 }
2791 unset_jvmti_thread_state();
2792 }
2793
2794 // register a stub
2795 void JvmtiDynamicCodeEventCollector::register_stub(const char* name, address start, address end) {
2796 if (_code_blobs == NULL) {
2797 _code_blobs = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<JvmtiCodeBlobDesc*>(1,true);
2798 }
2799 _code_blobs->append(new JvmtiCodeBlobDesc(name, start, end));
2800 }
2801
2802 // Setup current thread to record vm allocated objects.
2803 JvmtiObjectAllocEventCollector::JvmtiObjectAllocEventCollector() :
2804 _allocated(NULL), _enable(false), _post_callback(NULL) {
2805 }
2806
2807 // Post vm_object_alloc event for vm allocated objects visible to java
2808 // world.
2809 void JvmtiObjectAllocEventCollector::generate_call_for_allocated() {
2810 if (_allocated) {
2811 set_enabled(false);
2812 for (int i = 0; i < _allocated->length(); i++) {
2813 oop obj = _allocated->at(i);
2814 _post_callback(JavaThread::current(), obj);
2815 }
2816 delete _allocated, _allocated = NULL;
2817 }
2818 }
2819
2820 void JvmtiObjectAllocEventCollector::record_allocation(oop obj) {
2821 assert(is_enabled(), "Object alloc event collector is not enabled");
2822 if (_allocated == NULL) {
2823 _allocated = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<oop>(1, true);
2824 }
2825 _allocated->push(obj);
2826 }
2827
2828 // GC support.
2829 void JvmtiObjectAllocEventCollector::oops_do(OopClosure* f) {
2830 if (_allocated) {
2831 for(int i = _allocated->length() - 1; i >= 0; i--) {
2832 if (_allocated->at(i) != NULL) {
2833 f->do_oop(_allocated->adr_at(i));
2834 }
2835 }
2836 }
2837 }
2838
2839 void JvmtiObjectAllocEventCollector::oops_do_for_all_threads(OopClosure* f) {
2840 // no-op if jvmti not enabled
2841 if (!JvmtiEnv::environments_might_exist()) {
2842 return;
2843 }
2844
2845 for (JavaThreadIteratorWithHandle jtiwh; JavaThread *jthr = jtiwh.next(); ) {
2846 JvmtiThreadState *state = jthr->jvmti_thread_state();
2847 if (state != NULL) {
2848 JvmtiObjectAllocEventCollector *collector;
2849 collector = state->get_vm_object_alloc_event_collector();
2850 while (collector != NULL) {
2851 collector->oops_do(f);
2852 collector = (JvmtiObjectAllocEventCollector*) collector->get_prev();
2853 }
2854
2855 collector = state->get_sampled_object_alloc_event_collector();
2856 while (collector != NULL) {
2857 collector->oops_do(f);
2858 collector = (JvmtiObjectAllocEventCollector*) collector->get_prev();
2859 }
2860 }
2861 }
2862 }
2863
2864
2865 // Disable collection of VMObjectAlloc events
2866 NoJvmtiVMObjectAllocMark::NoJvmtiVMObjectAllocMark() : _collector(NULL) {
2867 // a no-op if VMObjectAlloc event is not enabled
2868 if (!JvmtiExport::should_post_vm_object_alloc()) {
2869 return;
2870 }
2871 Thread* thread = Thread::current_or_null();
2872 if (thread != NULL && thread->is_Java_thread()) {
2873 JavaThread* current_thread = (JavaThread*)thread;
2874 JvmtiThreadState *state = current_thread->jvmti_thread_state();
2875 if (state != NULL) {
2876 JvmtiVMObjectAllocEventCollector *collector;
2877 collector = state->get_vm_object_alloc_event_collector();
2878 if (collector != NULL && collector->is_enabled()) {
2879 _collector = collector;
2880 _collector->set_enabled(false);
2881 }
2882 }
2883 }
2884 }
2885
2886 // Re-Enable collection of VMObjectAlloc events (if previously enabled)
2887 NoJvmtiVMObjectAllocMark::~NoJvmtiVMObjectAllocMark() {
2888 if (was_enabled()) {
2889 _collector->set_enabled(true);
2890 }
2891 };
2892
2893 // Setup current thread to record vm allocated objects.
2894 JvmtiVMObjectAllocEventCollector::JvmtiVMObjectAllocEventCollector() {
2895 if (JvmtiExport::should_post_vm_object_alloc()) {
2896 _enable = true;
2897 setup_jvmti_thread_state();
2898 _post_callback = JvmtiExport::post_vm_object_alloc;
2899 }
2900 }
2901
2902 JvmtiVMObjectAllocEventCollector::~JvmtiVMObjectAllocEventCollector() {
2903 if (_enable) {
2904 generate_call_for_allocated();
2905 }
2906 unset_jvmti_thread_state();
2907 }
2908
2909 bool JvmtiSampledObjectAllocEventCollector::object_alloc_is_safe_to_sample() {
2910 Thread* thread = Thread::current();
2911 // Really only sample allocations if this is a JavaThread and not the compiler
2912 // thread.
2913 if (!thread->is_Java_thread() || thread->is_Compiler_thread()) {
2914 return false;
2915 }
2916
2917 if (Compile_lock->owner() == thread ||
2918 MultiArray_lock->owner() == thread) {
2919 return false;
2920 }
2921 return true;
2922 }
2923
2924 // Setup current thread to record sampled allocated objects.
2925 JvmtiSampledObjectAllocEventCollector::JvmtiSampledObjectAllocEventCollector() {
2926 if (JvmtiExport::should_post_sampled_object_alloc()) {
2927 if (!object_alloc_is_safe_to_sample()) {
2928 return;
2929 }
2930
2931 _enable = true;
2932 setup_jvmti_thread_state();
2933 _post_callback = JvmtiExport::post_sampled_object_alloc;
2934 }
2935 }
2936
2937 JvmtiSampledObjectAllocEventCollector::~JvmtiSampledObjectAllocEventCollector() {
2938 if (!_enable) {
2939 return;
2940 }
2941
2942 generate_call_for_allocated();
2943 unset_jvmti_thread_state();
2944
2945 // Unset the sampling collector as present in assertion mode only.
2946 assert(Thread::current()->is_Java_thread(),
2947 "Should always be in a Java thread");
2948 }
2949
2950 JvmtiGCMarker::JvmtiGCMarker() {
2951 // if there aren't any JVMTI environments then nothing to do
2952 if (!JvmtiEnv::environments_might_exist()) {
2953 return;
2954 }
2955
2956 if (JvmtiExport::should_post_garbage_collection_start()) {
2957 JvmtiExport::post_garbage_collection_start();
2958 }
2959
2960 if (SafepointSynchronize::is_at_safepoint()) {
2961 // Do clean up tasks that need to be done at a safepoint
2962 JvmtiEnvBase::check_for_periodic_clean_up();
2963 }
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 // JVMTI notify gc finish
2973 if (JvmtiExport::should_post_garbage_collection_finish()) {
2974 JvmtiExport::post_garbage_collection_finish();
2975 }
2976 }