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src/share/vm/prims/jvmtiEventController.cpp@abe03600372a
src/share/vm/prims/jvmtiEventController.cpp
Sun, 15 Sep 2013 15:28:58 +0200
- author
- goetz
- date
- Sun, 15 Sep 2013 15:28:58 +0200
- changeset 6470
- abe03600372a
- parent 4871
- 6b19fe41b577
- child 6198
- 55fb97c4c58d
- permissions
- -rw-r--r--
8024468: PPC64 (part 201): cppInterpreter: implement bytecode profiling
Summary: Implement profiling for c2 jit compilation. Also enable new cppInterpreter features.
Reviewed-by: kvn
1 /*
2 * Copyright (c) 2003, 2011, 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 */
25 #include "precompiled.hpp"
26 #include "interpreter/interpreter.hpp"
27 #include "jvmtifiles/jvmtiEnv.hpp"
28 #include "memory/resourceArea.hpp"
29 #include "prims/jvmtiEventController.hpp"
30 #include "prims/jvmtiEventController.inline.hpp"
31 #include "prims/jvmtiExport.hpp"
32 #include "prims/jvmtiImpl.hpp"
33 #include "prims/jvmtiThreadState.inline.hpp"
34 #include "runtime/frame.hpp"
35 #include "runtime/thread.hpp"
36 #include "runtime/vframe.hpp"
37 #include "runtime/vframe_hp.hpp"
38 #include "runtime/vmThread.hpp"
39 #include "runtime/vm_operations.hpp"
41 #ifdef JVMTI_TRACE
42 #define EC_TRACE(out) do { \
43 if (JvmtiTrace::trace_event_controller()) { \
44 SafeResourceMark rm; \
45 tty->print_cr out; \
46 } \
47 } while (0)
48 #else
49 #define EC_TRACE(out)
50 #endif /*JVMTI_TRACE */
52 // bits for standard events
54 static const jlong SINGLE_STEP_BIT = (((jlong)1) << (JVMTI_EVENT_SINGLE_STEP - TOTAL_MIN_EVENT_TYPE_VAL));
55 static const jlong FRAME_POP_BIT = (((jlong)1) << (JVMTI_EVENT_FRAME_POP - TOTAL_MIN_EVENT_TYPE_VAL));
56 static const jlong BREAKPOINT_BIT = (((jlong)1) << (JVMTI_EVENT_BREAKPOINT - TOTAL_MIN_EVENT_TYPE_VAL));
57 static const jlong FIELD_ACCESS_BIT = (((jlong)1) << (JVMTI_EVENT_FIELD_ACCESS - TOTAL_MIN_EVENT_TYPE_VAL));
58 static const jlong FIELD_MODIFICATION_BIT = (((jlong)1) << (JVMTI_EVENT_FIELD_MODIFICATION - TOTAL_MIN_EVENT_TYPE_VAL));
59 static const jlong METHOD_ENTRY_BIT = (((jlong)1) << (JVMTI_EVENT_METHOD_ENTRY - TOTAL_MIN_EVENT_TYPE_VAL));
60 static const jlong METHOD_EXIT_BIT = (((jlong)1) << (JVMTI_EVENT_METHOD_EXIT - TOTAL_MIN_EVENT_TYPE_VAL));
61 static const jlong CLASS_FILE_LOAD_HOOK_BIT = (((jlong)1) << (JVMTI_EVENT_CLASS_FILE_LOAD_HOOK - TOTAL_MIN_EVENT_TYPE_VAL));
62 static const jlong NATIVE_METHOD_BIND_BIT = (((jlong)1) << (JVMTI_EVENT_NATIVE_METHOD_BIND - TOTAL_MIN_EVENT_TYPE_VAL));
63 static const jlong VM_START_BIT = (((jlong)1) << (JVMTI_EVENT_VM_START - TOTAL_MIN_EVENT_TYPE_VAL));
64 static const jlong VM_INIT_BIT = (((jlong)1) << (JVMTI_EVENT_VM_INIT - TOTAL_MIN_EVENT_TYPE_VAL));
65 static const jlong VM_DEATH_BIT = (((jlong)1) << (JVMTI_EVENT_VM_DEATH - TOTAL_MIN_EVENT_TYPE_VAL));
66 static const jlong CLASS_LOAD_BIT = (((jlong)1) << (JVMTI_EVENT_CLASS_LOAD - TOTAL_MIN_EVENT_TYPE_VAL));
67 static const jlong CLASS_PREPARE_BIT = (((jlong)1) << (JVMTI_EVENT_CLASS_PREPARE - TOTAL_MIN_EVENT_TYPE_VAL));
68 static const jlong THREAD_START_BIT = (((jlong)1) << (JVMTI_EVENT_THREAD_START - TOTAL_MIN_EVENT_TYPE_VAL));
69 static const jlong THREAD_END_BIT = (((jlong)1) << (JVMTI_EVENT_THREAD_END - TOTAL_MIN_EVENT_TYPE_VAL));
70 static const jlong EXCEPTION_THROW_BIT = (((jlong)1) << (JVMTI_EVENT_EXCEPTION - TOTAL_MIN_EVENT_TYPE_VAL));
71 static const jlong EXCEPTION_CATCH_BIT = (((jlong)1) << (JVMTI_EVENT_EXCEPTION_CATCH - TOTAL_MIN_EVENT_TYPE_VAL));
72 static const jlong MONITOR_CONTENDED_ENTER_BIT = (((jlong)1) << (JVMTI_EVENT_MONITOR_CONTENDED_ENTER - TOTAL_MIN_EVENT_TYPE_VAL));
73 static const jlong MONITOR_CONTENDED_ENTERED_BIT = (((jlong)1) << (JVMTI_EVENT_MONITOR_CONTENDED_ENTERED - TOTAL_MIN_EVENT_TYPE_VAL));
74 static const jlong MONITOR_WAIT_BIT = (((jlong)1) << (JVMTI_EVENT_MONITOR_WAIT - TOTAL_MIN_EVENT_TYPE_VAL));
75 static const jlong MONITOR_WAITED_BIT = (((jlong)1) << (JVMTI_EVENT_MONITOR_WAITED - TOTAL_MIN_EVENT_TYPE_VAL));
76 static const jlong DYNAMIC_CODE_GENERATED_BIT = (((jlong)1) << (JVMTI_EVENT_DYNAMIC_CODE_GENERATED - TOTAL_MIN_EVENT_TYPE_VAL));
77 static const jlong DATA_DUMP_BIT = (((jlong)1) << (JVMTI_EVENT_DATA_DUMP_REQUEST - TOTAL_MIN_EVENT_TYPE_VAL));
78 static const jlong COMPILED_METHOD_LOAD_BIT = (((jlong)1) << (JVMTI_EVENT_COMPILED_METHOD_LOAD - TOTAL_MIN_EVENT_TYPE_VAL));
79 static const jlong COMPILED_METHOD_UNLOAD_BIT = (((jlong)1) << (JVMTI_EVENT_COMPILED_METHOD_UNLOAD - TOTAL_MIN_EVENT_TYPE_VAL));
80 static const jlong GARBAGE_COLLECTION_START_BIT = (((jlong)1) << (JVMTI_EVENT_GARBAGE_COLLECTION_START - TOTAL_MIN_EVENT_TYPE_VAL));
81 static const jlong GARBAGE_COLLECTION_FINISH_BIT = (((jlong)1) << (JVMTI_EVENT_GARBAGE_COLLECTION_FINISH - TOTAL_MIN_EVENT_TYPE_VAL));
82 static const jlong OBJECT_FREE_BIT = (((jlong)1) << (JVMTI_EVENT_OBJECT_FREE - TOTAL_MIN_EVENT_TYPE_VAL));
83 static const jlong RESOURCE_EXHAUSTED_BIT = (((jlong)1) << (JVMTI_EVENT_RESOURCE_EXHAUSTED - TOTAL_MIN_EVENT_TYPE_VAL));
84 static const jlong VM_OBJECT_ALLOC_BIT = (((jlong)1) << (JVMTI_EVENT_VM_OBJECT_ALLOC - TOTAL_MIN_EVENT_TYPE_VAL));
86 // bits for extension events
87 static const jlong CLASS_UNLOAD_BIT = (((jlong)1) << (EXT_EVENT_CLASS_UNLOAD - TOTAL_MIN_EVENT_TYPE_VAL));
90 static const jlong MONITOR_BITS = MONITOR_CONTENDED_ENTER_BIT | MONITOR_CONTENDED_ENTERED_BIT |
91 MONITOR_WAIT_BIT | MONITOR_WAITED_BIT;
92 static const jlong EXCEPTION_BITS = EXCEPTION_THROW_BIT | EXCEPTION_CATCH_BIT;
93 static const jlong INTERP_EVENT_BITS = SINGLE_STEP_BIT | METHOD_ENTRY_BIT | METHOD_EXIT_BIT |
94 FRAME_POP_BIT | FIELD_ACCESS_BIT | FIELD_MODIFICATION_BIT;
95 static const jlong THREAD_FILTERED_EVENT_BITS = INTERP_EVENT_BITS | EXCEPTION_BITS | MONITOR_BITS |
96 BREAKPOINT_BIT | CLASS_LOAD_BIT | CLASS_PREPARE_BIT | THREAD_END_BIT;
97 static const jlong NEED_THREAD_LIFE_EVENTS = THREAD_FILTERED_EVENT_BITS | THREAD_START_BIT;
98 static const jlong EARLY_EVENT_BITS = CLASS_FILE_LOAD_HOOK_BIT |
99 VM_START_BIT | VM_INIT_BIT | VM_DEATH_BIT | NATIVE_METHOD_BIND_BIT |
100 THREAD_START_BIT | THREAD_END_BIT |
101 DYNAMIC_CODE_GENERATED_BIT;
102 static const jlong GLOBAL_EVENT_BITS = ~THREAD_FILTERED_EVENT_BITS;
103 static const jlong SHOULD_POST_ON_EXCEPTIONS_BITS = EXCEPTION_BITS | METHOD_EXIT_BIT | FRAME_POP_BIT;
105 ///////////////////////////////////////////////////////////////
106 //
107 // JvmtiEventEnabled
108 //
110 JvmtiEventEnabled::JvmtiEventEnabled() {
111 clear();
112 }
115 void JvmtiEventEnabled::clear() {
116 _enabled_bits = 0;
117 #ifndef PRODUCT
118 _init_guard = JEE_INIT_GUARD;
119 #endif
120 }
122 void JvmtiEventEnabled::set_enabled(jvmtiEvent event_type, bool enabled) {
123 jlong bits = get_bits();
124 jlong mask = bit_for(event_type);
125 if (enabled) {
126 bits |= mask;
127 } else {
128 bits &= ~mask;
129 }
130 set_bits(bits);
131 }
134 ///////////////////////////////////////////////////////////////
135 //
136 // JvmtiEnvThreadEventEnable
137 //
139 JvmtiEnvThreadEventEnable::JvmtiEnvThreadEventEnable() {
140 _event_user_enabled.clear();
141 _event_enabled.clear();
142 }
145 JvmtiEnvThreadEventEnable::~JvmtiEnvThreadEventEnable() {
146 _event_user_enabled.clear();
147 _event_enabled.clear();
148 }
151 ///////////////////////////////////////////////////////////////
152 //
153 // JvmtiThreadEventEnable
154 //
156 JvmtiThreadEventEnable::JvmtiThreadEventEnable() {
157 _event_enabled.clear();
158 }
161 JvmtiThreadEventEnable::~JvmtiThreadEventEnable() {
162 _event_enabled.clear();
163 }
166 ///////////////////////////////////////////////////////////////
167 //
168 // JvmtiEnvEventEnable
169 //
171 JvmtiEnvEventEnable::JvmtiEnvEventEnable() {
172 _event_user_enabled.clear();
173 _event_callback_enabled.clear();
174 _event_enabled.clear();
175 }
178 JvmtiEnvEventEnable::~JvmtiEnvEventEnable() {
179 _event_user_enabled.clear();
180 _event_callback_enabled.clear();
181 _event_enabled.clear();
182 }
185 ///////////////////////////////////////////////////////////////
186 //
187 // VM_EnterInterpOnlyMode
188 //
190 class VM_EnterInterpOnlyMode : public VM_Operation {
191 private:
192 JvmtiThreadState *_state;
194 public:
195 VM_EnterInterpOnlyMode(JvmtiThreadState *state);
197 bool allow_nested_vm_operations() const { return true; }
198 VMOp_Type type() const { return VMOp_EnterInterpOnlyMode; }
199 void doit();
201 // to do: this same function is in jvmtiImpl - should be in one place
202 bool can_be_deoptimized(vframe* vf) {
203 return (vf->is_compiled_frame() && vf->fr().can_be_deoptimized());
204 }
205 };
207 VM_EnterInterpOnlyMode::VM_EnterInterpOnlyMode(JvmtiThreadState *state)
208 : _state(state)
209 {
210 }
213 void VM_EnterInterpOnlyMode::doit() {
214 // Set up the current stack depth for later tracking
215 _state->invalidate_cur_stack_depth();
217 _state->enter_interp_only_mode();
219 JavaThread *thread = _state->get_thread();
220 if (thread->has_last_Java_frame()) {
221 // If running in fullspeed mode, single stepping is implemented
222 // as follows: first, the interpreter does not dispatch to
223 // compiled code for threads that have single stepping enabled;
224 // second, we deoptimize all methods on the thread's stack when
225 // interpreted-only mode is enabled the first time for a given
226 // thread (nothing to do if no Java frames yet).
227 int num_marked = 0;
228 ResourceMark resMark;
229 RegisterMap rm(thread, false);
230 for (vframe* vf = thread->last_java_vframe(&rm); vf; vf = vf->sender()) {
231 if (can_be_deoptimized(vf)) {
232 ((compiledVFrame*) vf)->code()->mark_for_deoptimization();
233 ++num_marked;
234 }
235 }
236 if (num_marked > 0) {
237 VM_Deoptimize op;
238 VMThread::execute(&op);
239 }
240 }
241 }
244 ///////////////////////////////////////////////////////////////
245 //
246 // VM_ChangeSingleStep
247 //
249 class VM_ChangeSingleStep : public VM_Operation {
250 private:
251 bool _on;
253 public:
254 VM_ChangeSingleStep(bool on);
255 VMOp_Type type() const { return VMOp_ChangeSingleStep; }
256 bool allow_nested_vm_operations() const { return true; }
257 void doit(); // method definition is after definition of JvmtiEventControllerPrivate because of scoping
258 };
261 VM_ChangeSingleStep::VM_ChangeSingleStep(bool on)
262 : _on(on != 0)
263 {
264 }
269 ///////////////////////////////////////////////////////////////
270 //
271 // JvmtiEventControllerPrivate
272 //
273 // Private internal implementation methods for JvmtiEventController.
274 //
275 // These methods are thread safe either because they are called
276 // in early VM initialization which is single threaded, or they
277 // hold the JvmtiThreadState_lock.
278 //
280 class JvmtiEventControllerPrivate : public AllStatic {
281 static bool _initialized;
282 public:
283 static void set_should_post_single_step(bool on);
284 static void enter_interp_only_mode(JvmtiThreadState *state);
285 static void leave_interp_only_mode(JvmtiThreadState *state);
286 static void recompute_enabled();
287 static jlong recompute_env_enabled(JvmtiEnvBase* env);
288 static jlong recompute_env_thread_enabled(JvmtiEnvThreadState* ets, JvmtiThreadState* state);
289 static jlong recompute_thread_enabled(JvmtiThreadState *state);
290 static void event_init();
292 static void set_user_enabled(JvmtiEnvBase *env, JavaThread *thread,
293 jvmtiEvent event_type, bool enabled);
294 static void set_event_callbacks(JvmtiEnvBase *env,
295 const jvmtiEventCallbacks* callbacks,
296 jint size_of_callbacks);
298 static void set_extension_event_callback(JvmtiEnvBase *env,
299 jint extension_event_index,
300 jvmtiExtensionEvent callback);
302 static void set_frame_pop(JvmtiEnvThreadState *env_thread, JvmtiFramePop fpop);
303 static void clear_frame_pop(JvmtiEnvThreadState *env_thread, JvmtiFramePop fpop);
304 static void clear_to_frame_pop(JvmtiEnvThreadState *env_thread, JvmtiFramePop fpop);
305 static void change_field_watch(jvmtiEvent event_type, bool added);
307 static void thread_started(JavaThread *thread);
308 static void thread_ended(JavaThread *thread);
310 static void env_initialize(JvmtiEnvBase *env);
311 static void env_dispose(JvmtiEnvBase *env);
313 static void vm_start();
314 static void vm_init();
315 static void vm_death();
317 static void trace_changed(JvmtiThreadState *state, jlong now_enabled, jlong changed);
318 static void trace_changed(jlong now_enabled, jlong changed);
319 };
321 bool JvmtiEventControllerPrivate::_initialized = false;
323 void JvmtiEventControllerPrivate::set_should_post_single_step(bool on) {
324 // we have permission to do this, VM op doesn't
325 JvmtiExport::set_should_post_single_step(on);
326 }
329 // This change must always be occur when at a safepoint.
330 // Being at a safepoint causes the interpreter to use the
331 // safepoint dispatch table which we overload to find single
332 // step points. Just to be sure that it has been set, we
333 // call notice_safepoints when turning on single stepping.
334 // When we leave our current safepoint, should_post_single_step
335 // will be checked by the interpreter, and the table kept
336 // or changed accordingly.
337 void VM_ChangeSingleStep::doit() {
338 JvmtiEventControllerPrivate::set_should_post_single_step(_on);
339 if (_on) {
340 Interpreter::notice_safepoints();
341 }
342 }
345 void JvmtiEventControllerPrivate::enter_interp_only_mode(JvmtiThreadState *state) {
346 EC_TRACE(("JVMTI [%s] # Entering interpreter only mode",
347 JvmtiTrace::safe_get_thread_name(state->get_thread())));
349 VM_EnterInterpOnlyMode op(state);
350 VMThread::execute(&op);
351 }
354 void
355 JvmtiEventControllerPrivate::leave_interp_only_mode(JvmtiThreadState *state) {
356 EC_TRACE(("JVMTI [%s] # Leaving interpreter only mode",
357 JvmtiTrace::safe_get_thread_name(state->get_thread())));
358 state->leave_interp_only_mode();
359 }
362 void
363 JvmtiEventControllerPrivate::trace_changed(JvmtiThreadState *state, jlong now_enabled, jlong changed) {
364 #ifdef JVMTI_TRACE
365 if (JvmtiTrace::trace_event_controller()) {
366 SafeResourceMark rm;
367 // traces standard events only
368 for (int ei = JVMTI_MIN_EVENT_TYPE_VAL; ei <= JVMTI_MAX_EVENT_TYPE_VAL; ++ei) {
369 jlong bit = JvmtiEventEnabled::bit_for((jvmtiEvent)ei);
370 if (changed & bit) {
371 // it changed, print it
372 tty->print_cr("JVMTI [%s] # %s event %s",
373 JvmtiTrace::safe_get_thread_name(state->get_thread()),
374 (now_enabled & bit)? "Enabling" : "Disabling", JvmtiTrace::event_name((jvmtiEvent)ei));
375 }
376 }
377 }
378 #endif /*JVMTI_TRACE */
379 }
382 void
383 JvmtiEventControllerPrivate::trace_changed(jlong now_enabled, jlong changed) {
384 #ifdef JVMTI_TRACE
385 if (JvmtiTrace::trace_event_controller()) {
386 SafeResourceMark rm;
387 // traces standard events only
388 for (int ei = JVMTI_MIN_EVENT_TYPE_VAL; ei <= JVMTI_MAX_EVENT_TYPE_VAL; ++ei) {
389 jlong bit = JvmtiEventEnabled::bit_for((jvmtiEvent)ei);
390 if (changed & bit) {
391 // it changed, print it
392 tty->print_cr("JVMTI [-] # %s event %s",
393 (now_enabled & bit)? "Enabling" : "Disabling", JvmtiTrace::event_name((jvmtiEvent)ei));
394 }
395 }
396 }
397 #endif /*JVMTI_TRACE */
398 }
401 // For the specified env: compute the currently truly enabled events
402 // set external state accordingly.
403 // Return value and set value must include all events.
404 // But outside this class, only non-thread-filtered events can be queried..
405 jlong
406 JvmtiEventControllerPrivate::recompute_env_enabled(JvmtiEnvBase* env) {
407 jlong was_enabled = env->env_event_enable()->_event_enabled.get_bits();
408 jlong now_enabled =
409 env->env_event_enable()->_event_callback_enabled.get_bits() &
410 env->env_event_enable()->_event_user_enabled.get_bits();
412 switch (JvmtiEnv::get_phase()) {
413 case JVMTI_PHASE_PRIMORDIAL:
414 case JVMTI_PHASE_ONLOAD:
415 // only these events allowed in primordial or onload phase
416 now_enabled &= (EARLY_EVENT_BITS & ~THREAD_FILTERED_EVENT_BITS);
417 break;
418 case JVMTI_PHASE_START:
419 // only these events allowed in start phase
420 now_enabled &= EARLY_EVENT_BITS;
421 break;
422 case JVMTI_PHASE_LIVE:
423 // all events allowed during live phase
424 break;
425 case JVMTI_PHASE_DEAD:
426 // no events allowed when dead
427 now_enabled = 0;
428 break;
429 default:
430 assert(false, "no other phases - sanity check");
431 break;
432 }
434 // will we really send these events to this env
435 env->env_event_enable()->_event_enabled.set_bits(now_enabled);
437 trace_changed(now_enabled, (now_enabled ^ was_enabled) & ~THREAD_FILTERED_EVENT_BITS);
439 return now_enabled;
440 }
443 // For the specified env and thread: compute the currently truly enabled events
444 // set external state accordingly. Only thread-filtered events are included.
445 jlong
446 JvmtiEventControllerPrivate::recompute_env_thread_enabled(JvmtiEnvThreadState* ets, JvmtiThreadState* state) {
447 JvmtiEnv *env = ets->get_env();
449 jlong was_enabled = ets->event_enable()->_event_enabled.get_bits();
450 jlong now_enabled = THREAD_FILTERED_EVENT_BITS &
451 env->env_event_enable()->_event_callback_enabled.get_bits() &
452 (env->env_event_enable()->_event_user_enabled.get_bits() |
453 ets->event_enable()->_event_user_enabled.get_bits());
455 // for frame pops and field watchs, computed enabled state
456 // is only true if an event has been requested
457 if (!ets->has_frame_pops()) {
458 now_enabled &= ~FRAME_POP_BIT;
459 }
460 if (*((int *)JvmtiExport::get_field_access_count_addr()) == 0) {
461 now_enabled &= ~FIELD_ACCESS_BIT;
462 }
463 if (*((int *)JvmtiExport::get_field_modification_count_addr()) == 0) {
464 now_enabled &= ~FIELD_MODIFICATION_BIT;
465 }
467 switch (JvmtiEnv::get_phase()) {
468 case JVMTI_PHASE_DEAD:
469 // no events allowed when dead
470 now_enabled = 0;
471 break;
472 }
474 // if anything changed do update
475 if (now_enabled != was_enabled) {
477 // will we really send these events to this thread x env
478 ets->event_enable()->_event_enabled.set_bits(now_enabled);
480 // If the enabled status of the single step or breakpoint events changed,
481 // the location status may need to change as well.
482 jlong changed = now_enabled ^ was_enabled;
483 if (changed & SINGLE_STEP_BIT) {
484 ets->reset_current_location(JVMTI_EVENT_SINGLE_STEP, (now_enabled & SINGLE_STEP_BIT) != 0);
485 }
486 if (changed & BREAKPOINT_BIT) {
487 ets->reset_current_location(JVMTI_EVENT_BREAKPOINT, (now_enabled & BREAKPOINT_BIT) != 0);
488 }
489 trace_changed(state, now_enabled, changed);
490 }
491 return now_enabled;
492 }
495 // For the specified thread: compute the currently truly enabled events
496 // set external state accordingly. Only thread-filtered events are included.
497 jlong
498 JvmtiEventControllerPrivate::recompute_thread_enabled(JvmtiThreadState *state) {
499 if (state == NULL) {
500 // associated JavaThread is exiting
501 return (jlong)0;
502 }
504 jlong was_any_env_enabled = state->thread_event_enable()->_event_enabled.get_bits();
505 jlong any_env_enabled = 0;
507 {
508 // This iteration will include JvmtiEnvThreadStates whoses environments
509 // have been disposed. These JvmtiEnvThreadStates must not be filtered
510 // as recompute must be called on them to disable their events,
511 JvmtiEnvThreadStateIterator it(state);
512 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
513 any_env_enabled |= recompute_env_thread_enabled(ets, state);
514 }
515 }
517 if (any_env_enabled != was_any_env_enabled) {
518 // mark if event is truly enabled on this thread in any environment
519 state->thread_event_enable()->_event_enabled.set_bits(any_env_enabled);
521 // compute interp_only mode
522 bool should_be_interp = (any_env_enabled & INTERP_EVENT_BITS) != 0;
523 bool is_now_interp = state->is_interp_only_mode();
525 if (should_be_interp != is_now_interp) {
526 if (should_be_interp) {
527 enter_interp_only_mode(state);
528 } else {
529 leave_interp_only_mode(state);
530 }
531 }
533 // update the JavaThread cached value for thread-specific should_post_on_exceptions value
534 bool should_post_on_exceptions = (any_env_enabled & SHOULD_POST_ON_EXCEPTIONS_BITS) != 0;
535 state->set_should_post_on_exceptions(should_post_on_exceptions);
536 }
538 return any_env_enabled;
539 }
542 // Compute truly enabled events - meaning if the event can and could be
543 // sent. An event is truly enabled if it is user enabled on the thread
544 // or globally user enabled, but only if there is a callback or event hook
545 // for it and, for field watch and frame pop, one has been set.
546 // Compute if truly enabled, per thread, per environment, per combination
547 // (thread x environment), and overall. These merges are true if any is true.
548 // True per thread if some environment has callback set and the event is globally
549 // enabled or enabled for this thread.
550 // True per environment if the callback is set and the event is globally
551 // enabled in this environment or enabled for any thread in this environment.
552 // True per combination if the environment has the callback set and the
553 // event is globally enabled in this environment or the event is enabled
554 // for this thread and environment.
555 //
556 // All states transitions dependent on these transitions are also handled here.
557 void
558 JvmtiEventControllerPrivate::recompute_enabled() {
559 assert(Threads::number_of_threads() == 0 || JvmtiThreadState_lock->is_locked(), "sanity check");
561 // event enabled for any thread in any environment
562 jlong was_any_env_thread_enabled = JvmtiEventController::_universal_global_event_enabled.get_bits();
563 jlong any_env_thread_enabled = 0;
565 EC_TRACE(("JVMTI [-] # recompute enabled - before %llx", was_any_env_thread_enabled));
567 // compute non-thread-filters events.
568 // This must be done separately from thread-filtered events, since some
569 // events can occur before any threads exist.
570 JvmtiEnvIterator it;
571 for (JvmtiEnvBase* env = it.first(); env != NULL; env = it.next(env)) {
572 any_env_thread_enabled |= recompute_env_enabled(env);
573 }
575 // We need to create any missing jvmti_thread_state if there are globally set thread
576 // filtered events and there weren't last time
577 if ( (any_env_thread_enabled & THREAD_FILTERED_EVENT_BITS) != 0 &&
578 (was_any_env_thread_enabled & THREAD_FILTERED_EVENT_BITS) == 0) {
579 assert(JvmtiEnv::is_vm_live() || (JvmtiEnv::get_phase()==JVMTI_PHASE_START),
580 "thread filtered events should not be enabled when VM not in start or live phase");
581 {
582 MutexLocker mu(Threads_lock); //hold the Threads_lock for the iteration
583 for (JavaThread *tp = Threads::first(); tp != NULL; tp = tp->next()) {
584 // state_for_while_locked() makes tp->is_exiting() check
585 JvmtiThreadState::state_for_while_locked(tp); // create the thread state if missing
586 }
587 }// release Threads_lock
588 }
590 // compute and set thread-filtered events
591 for (JvmtiThreadState *state = JvmtiThreadState::first(); state != NULL; state = state->next()) {
592 any_env_thread_enabled |= recompute_thread_enabled(state);
593 }
595 // set universal state (across all envs and threads)
596 jlong delta = any_env_thread_enabled ^ was_any_env_thread_enabled;
597 if (delta != 0) {
598 JvmtiExport::set_should_post_field_access((any_env_thread_enabled & FIELD_ACCESS_BIT) != 0);
599 JvmtiExport::set_should_post_field_modification((any_env_thread_enabled & FIELD_MODIFICATION_BIT) != 0);
600 JvmtiExport::set_should_post_class_load((any_env_thread_enabled & CLASS_LOAD_BIT) != 0);
601 JvmtiExport::set_should_post_class_file_load_hook((any_env_thread_enabled & CLASS_FILE_LOAD_HOOK_BIT) != 0);
602 JvmtiExport::set_should_post_native_method_bind((any_env_thread_enabled & NATIVE_METHOD_BIND_BIT) != 0);
603 JvmtiExport::set_should_post_dynamic_code_generated((any_env_thread_enabled & DYNAMIC_CODE_GENERATED_BIT) != 0);
604 JvmtiExport::set_should_post_data_dump((any_env_thread_enabled & DATA_DUMP_BIT) != 0);
605 JvmtiExport::set_should_post_class_prepare((any_env_thread_enabled & CLASS_PREPARE_BIT) != 0);
606 JvmtiExport::set_should_post_class_unload((any_env_thread_enabled & CLASS_UNLOAD_BIT) != 0);
607 JvmtiExport::set_should_post_monitor_contended_enter((any_env_thread_enabled & MONITOR_CONTENDED_ENTER_BIT) != 0);
608 JvmtiExport::set_should_post_monitor_contended_entered((any_env_thread_enabled & MONITOR_CONTENDED_ENTERED_BIT) != 0);
609 JvmtiExport::set_should_post_monitor_wait((any_env_thread_enabled & MONITOR_WAIT_BIT) != 0);
610 JvmtiExport::set_should_post_monitor_waited((any_env_thread_enabled & MONITOR_WAITED_BIT) != 0);
611 JvmtiExport::set_should_post_garbage_collection_start((any_env_thread_enabled & GARBAGE_COLLECTION_START_BIT) != 0);
612 JvmtiExport::set_should_post_garbage_collection_finish((any_env_thread_enabled & GARBAGE_COLLECTION_FINISH_BIT) != 0);
613 JvmtiExport::set_should_post_object_free((any_env_thread_enabled & OBJECT_FREE_BIT) != 0);
614 JvmtiExport::set_should_post_resource_exhausted((any_env_thread_enabled & RESOURCE_EXHAUSTED_BIT) != 0);
615 JvmtiExport::set_should_post_compiled_method_load((any_env_thread_enabled & COMPILED_METHOD_LOAD_BIT) != 0);
616 JvmtiExport::set_should_post_compiled_method_unload((any_env_thread_enabled & COMPILED_METHOD_UNLOAD_BIT) != 0);
617 JvmtiExport::set_should_post_vm_object_alloc((any_env_thread_enabled & VM_OBJECT_ALLOC_BIT) != 0);
619 // need this if we want thread events or we need them to init data
620 JvmtiExport::set_should_post_thread_life((any_env_thread_enabled & NEED_THREAD_LIFE_EVENTS) != 0);
622 // If single stepping is turned on or off, execute the VM op to change it.
623 if (delta & SINGLE_STEP_BIT) {
624 switch (JvmtiEnv::get_phase()) {
625 case JVMTI_PHASE_DEAD:
626 // If the VM is dying we can't execute VM ops
627 break;
628 case JVMTI_PHASE_LIVE: {
629 VM_ChangeSingleStep op((any_env_thread_enabled & SINGLE_STEP_BIT) != 0);
630 VMThread::execute(&op);
631 break;
632 }
633 default:
634 assert(false, "should never come here before live phase");
635 break;
636 }
637 }
639 // set global truly enabled, that is, any thread in any environment
640 JvmtiEventController::_universal_global_event_enabled.set_bits(any_env_thread_enabled);
642 // set global should_post_on_exceptions
643 JvmtiExport::set_should_post_on_exceptions((any_env_thread_enabled & SHOULD_POST_ON_EXCEPTIONS_BITS) != 0);
645 }
647 EC_TRACE(("JVMTI [-] # recompute enabled - after %llx", any_env_thread_enabled));
648 }
651 void
652 JvmtiEventControllerPrivate::thread_started(JavaThread *thread) {
653 assert(thread->is_Java_thread(), "Must be JavaThread");
654 assert(thread == Thread::current(), "must be current thread");
655 assert(JvmtiEnvBase::environments_might_exist(), "to enter event controller, JVM TI environments must exist");
657 EC_TRACE(("JVMTI [%s] # thread started", JvmtiTrace::safe_get_thread_name(thread)));
659 // if we have any thread filtered events globally enabled, create/update the thread state
660 if ((JvmtiEventController::_universal_global_event_enabled.get_bits() & THREAD_FILTERED_EVENT_BITS) != 0) {
661 MutexLocker mu(JvmtiThreadState_lock);
662 // create the thread state if missing
663 JvmtiThreadState *state = JvmtiThreadState::state_for_while_locked(thread);
664 if (state != NULL) { // skip threads with no JVMTI thread state
665 recompute_thread_enabled(state);
666 }
667 }
668 }
671 void
672 JvmtiEventControllerPrivate::thread_ended(JavaThread *thread) {
673 // Removes the JvmtiThreadState associated with the specified thread.
674 // May be called after all environments have been disposed.
675 assert(JvmtiThreadState_lock->is_locked(), "sanity check");
677 EC_TRACE(("JVMTI [%s] # thread ended", JvmtiTrace::safe_get_thread_name(thread)));
679 JvmtiThreadState *state = thread->jvmti_thread_state();
680 assert(state != NULL, "else why are we here?");
681 delete state;
682 }
684 void JvmtiEventControllerPrivate::set_event_callbacks(JvmtiEnvBase *env,
685 const jvmtiEventCallbacks* callbacks,
686 jint size_of_callbacks) {
687 assert(Threads::number_of_threads() == 0 || JvmtiThreadState_lock->is_locked(), "sanity check");
688 EC_TRACE(("JVMTI [*] # set event callbacks"));
690 env->set_event_callbacks(callbacks, size_of_callbacks);
691 jlong enabled_bits = 0;
692 for (int ei = JVMTI_MIN_EVENT_TYPE_VAL; ei <= JVMTI_MAX_EVENT_TYPE_VAL; ++ei) {
693 jvmtiEvent evt_t = (jvmtiEvent)ei;
694 if (env->has_callback(evt_t)) {
695 enabled_bits |= JvmtiEventEnabled::bit_for(evt_t);
696 }
697 }
698 env->env_event_enable()->_event_callback_enabled.set_bits(enabled_bits);
699 recompute_enabled();
700 }
702 void
703 JvmtiEventControllerPrivate::set_extension_event_callback(JvmtiEnvBase *env,
704 jint extension_event_index,
705 jvmtiExtensionEvent callback)
706 {
707 assert(Threads::number_of_threads() == 0 || JvmtiThreadState_lock->is_locked(), "sanity check");
708 EC_TRACE(("JVMTI [*] # set extension event callback"));
710 // extension events are allocated below JVMTI_MIN_EVENT_TYPE_VAL
711 assert(extension_event_index >= (jint)EXT_MIN_EVENT_TYPE_VAL &&
712 extension_event_index <= (jint)EXT_MAX_EVENT_TYPE_VAL, "sanity check");
715 // As the bits for both standard (jvmtiEvent) and extension
716 // (jvmtiExtEvents) are stored in the same word we cast here to
717 // jvmtiEvent to set/clear the bit for this extension event.
718 jvmtiEvent event_type = (jvmtiEvent)extension_event_index;
720 // Prevent a possible race condition where events are re-enabled by a call to
721 // set event callbacks, where the DisposeEnvironment occurs after the boiler-plate
722 // environment check and before the lock is acquired.
723 // We can safely do the is_valid check now, as JvmtiThreadState_lock is held.
724 bool enabling = (callback != NULL) && (env->is_valid());
725 env->env_event_enable()->set_user_enabled(event_type, enabling);
727 // update the callback
728 jvmtiExtEventCallbacks* ext_callbacks = env->ext_callbacks();
729 switch (extension_event_index) {
730 case EXT_EVENT_CLASS_UNLOAD :
731 ext_callbacks->ClassUnload = callback;
732 break;
733 default:
734 ShouldNotReachHere();
735 }
737 // update the callback enable/disable bit
738 jlong enabled_bits = env->env_event_enable()->_event_callback_enabled.get_bits();
739 jlong bit_for = JvmtiEventEnabled::bit_for(event_type);
740 if (enabling) {
741 enabled_bits |= bit_for;
742 } else {
743 enabled_bits &= ~bit_for;
744 }
745 env->env_event_enable()->_event_callback_enabled.set_bits(enabled_bits);
747 recompute_enabled();
748 }
751 void
752 JvmtiEventControllerPrivate::env_initialize(JvmtiEnvBase *env) {
753 assert(Threads::number_of_threads() == 0 || JvmtiThreadState_lock->is_locked(), "sanity check");
754 EC_TRACE(("JVMTI [*] # env initialize"));
756 if (JvmtiEnvBase::is_vm_live()) {
757 // if we didn't initialize event info already (this is a late
758 // launched environment), do it now.
759 event_init();
760 }
762 env->initialize();
764 // add the JvmtiEnvThreadState to each JvmtiThreadState
765 for (JvmtiThreadState *state = JvmtiThreadState::first(); state != NULL; state = state->next()) {
766 state->add_env(env);
767 assert((JvmtiEnv*)(state->env_thread_state(env)->get_env()) == env, "sanity check");
768 }
769 JvmtiEventControllerPrivate::recompute_enabled();
770 }
773 void
774 JvmtiEventControllerPrivate::env_dispose(JvmtiEnvBase *env) {
775 assert(Threads::number_of_threads() == 0 || JvmtiThreadState_lock->is_locked(), "sanity check");
776 EC_TRACE(("JVMTI [*] # env dispose"));
778 // Before the environment is marked disposed, disable all events on this
779 // environment (by zapping the callbacks). As a result, the disposed
780 // environment will not call event handlers.
781 set_event_callbacks(env, NULL, 0);
782 for (jint extension_event_index = EXT_MIN_EVENT_TYPE_VAL;
783 extension_event_index <= EXT_MAX_EVENT_TYPE_VAL;
784 ++extension_event_index) {
785 set_extension_event_callback(env, extension_event_index, NULL);
786 }
788 // Let the environment finish disposing itself.
789 env->env_dispose();
790 }
793 void
794 JvmtiEventControllerPrivate::set_user_enabled(JvmtiEnvBase *env, JavaThread *thread,
795 jvmtiEvent event_type, bool enabled) {
796 assert(Threads::number_of_threads() == 0 || JvmtiThreadState_lock->is_locked(), "sanity check");
798 EC_TRACE(("JVMTI [%s] # user %s event %s",
799 thread==NULL? "ALL": JvmtiTrace::safe_get_thread_name(thread),
800 enabled? "enabled" : "disabled", JvmtiTrace::event_name(event_type)));
802 if (thread == NULL) {
803 env->env_event_enable()->set_user_enabled(event_type, enabled);
804 } else {
805 // create the thread state (if it didn't exist before)
806 JvmtiThreadState *state = JvmtiThreadState::state_for_while_locked(thread);
807 if (state != NULL) {
808 state->env_thread_state(env)->event_enable()->set_user_enabled(event_type, enabled);
809 }
810 }
811 recompute_enabled();
812 }
815 void
816 JvmtiEventControllerPrivate::set_frame_pop(JvmtiEnvThreadState *ets, JvmtiFramePop fpop) {
817 EC_TRACE(("JVMTI [%s] # set frame pop - frame=%d",
818 JvmtiTrace::safe_get_thread_name(ets->get_thread()),
819 fpop.frame_number() ));
821 ets->get_frame_pops()->set(fpop);
822 recompute_thread_enabled(ets->get_thread()->jvmti_thread_state());
823 }
826 void
827 JvmtiEventControllerPrivate::clear_frame_pop(JvmtiEnvThreadState *ets, JvmtiFramePop fpop) {
828 EC_TRACE(("JVMTI [%s] # clear frame pop - frame=%d",
829 JvmtiTrace::safe_get_thread_name(ets->get_thread()),
830 fpop.frame_number() ));
832 ets->get_frame_pops()->clear(fpop);
833 recompute_thread_enabled(ets->get_thread()->jvmti_thread_state());
834 }
837 void
838 JvmtiEventControllerPrivate::clear_to_frame_pop(JvmtiEnvThreadState *ets, JvmtiFramePop fpop) {
839 int cleared_cnt = ets->get_frame_pops()->clear_to(fpop);
841 EC_TRACE(("JVMTI [%s] # clear to frame pop - frame=%d, count=%d",
842 JvmtiTrace::safe_get_thread_name(ets->get_thread()),
843 fpop.frame_number(),
844 cleared_cnt ));
846 if (cleared_cnt > 0) {
847 recompute_thread_enabled(ets->get_thread()->jvmti_thread_state());
848 }
849 }
851 void
852 JvmtiEventControllerPrivate::change_field_watch(jvmtiEvent event_type, bool added) {
853 int *count_addr;
855 switch (event_type) {
856 case JVMTI_EVENT_FIELD_MODIFICATION:
857 count_addr = (int *)JvmtiExport::get_field_modification_count_addr();
858 break;
859 case JVMTI_EVENT_FIELD_ACCESS:
860 count_addr = (int *)JvmtiExport::get_field_access_count_addr();
861 break;
862 default:
863 assert(false, "incorrect event");
864 return;
865 }
867 EC_TRACE(("JVMTI [-] # change field watch - %s %s count=%d",
868 event_type==JVMTI_EVENT_FIELD_MODIFICATION? "modification" : "access",
869 added? "add" : "remove",
870 *count_addr));
872 if (added) {
873 (*count_addr)++;
874 if (*count_addr == 1) {
875 recompute_enabled();
876 }
877 } else {
878 if (*count_addr > 0) {
879 (*count_addr)--;
880 if (*count_addr == 0) {
881 recompute_enabled();
882 }
883 } else {
884 assert(false, "field watch out of phase");
885 }
886 }
887 }
889 void
890 JvmtiEventControllerPrivate::event_init() {
891 assert(JvmtiThreadState_lock->is_locked(), "sanity check");
893 if (_initialized) {
894 return;
895 }
897 EC_TRACE(("JVMTI [-] # VM live"));
899 #ifdef ASSERT
900 // check that our idea and the spec's idea of threaded events match
901 for (int ei = JVMTI_MIN_EVENT_TYPE_VAL; ei <= JVMTI_MAX_EVENT_TYPE_VAL; ++ei) {
902 jlong bit = JvmtiEventEnabled::bit_for((jvmtiEvent)ei);
903 assert(((THREAD_FILTERED_EVENT_BITS & bit) != 0) == JvmtiUtil::event_threaded(ei),
904 "thread filtered event list does not match");
905 }
906 #endif
908 _initialized = true;
909 }
911 void
912 JvmtiEventControllerPrivate::vm_start() {
913 // some events are now able to be enabled (phase has changed)
914 JvmtiEventControllerPrivate::recompute_enabled();
915 }
918 void
919 JvmtiEventControllerPrivate::vm_init() {
920 event_init();
922 // all the events are now able to be enabled (phase has changed)
923 JvmtiEventControllerPrivate::recompute_enabled();
924 }
927 void
928 JvmtiEventControllerPrivate::vm_death() {
929 // events are disabled (phase has changed)
930 JvmtiEventControllerPrivate::recompute_enabled();
931 }
934 ///////////////////////////////////////////////////////////////
935 //
936 // JvmtiEventController
937 //
939 JvmtiEventEnabled JvmtiEventController::_universal_global_event_enabled;
941 bool
942 JvmtiEventController::is_global_event(jvmtiEvent event_type) {
943 assert(is_valid_event_type(event_type), "invalid event type");
944 jlong bit_for = ((jlong)1) << (event_type - TOTAL_MIN_EVENT_TYPE_VAL);
945 return((bit_for & GLOBAL_EVENT_BITS)!=0);
946 }
948 void
949 JvmtiEventController::set_user_enabled(JvmtiEnvBase *env, JavaThread *thread, jvmtiEvent event_type, bool enabled) {
950 if (Threads::number_of_threads() == 0) {
951 // during early VM start-up locks don't exist, but we are safely single threaded,
952 // call the functionality without holding the JvmtiThreadState_lock.
953 JvmtiEventControllerPrivate::set_user_enabled(env, thread, event_type, enabled);
954 } else {
955 MutexLocker mu(JvmtiThreadState_lock);
956 JvmtiEventControllerPrivate::set_user_enabled(env, thread, event_type, enabled);
957 }
958 }
961 void
962 JvmtiEventController::set_event_callbacks(JvmtiEnvBase *env,
963 const jvmtiEventCallbacks* callbacks,
964 jint size_of_callbacks) {
965 if (Threads::number_of_threads() == 0) {
966 // during early VM start-up locks don't exist, but we are safely single threaded,
967 // call the functionality without holding the JvmtiThreadState_lock.
968 JvmtiEventControllerPrivate::set_event_callbacks(env, callbacks, size_of_callbacks);
969 } else {
970 MutexLocker mu(JvmtiThreadState_lock);
971 JvmtiEventControllerPrivate::set_event_callbacks(env, callbacks, size_of_callbacks);
972 }
973 }
975 void
976 JvmtiEventController::set_extension_event_callback(JvmtiEnvBase *env,
977 jint extension_event_index,
978 jvmtiExtensionEvent callback) {
979 if (Threads::number_of_threads() == 0) {
980 JvmtiEventControllerPrivate::set_extension_event_callback(env, extension_event_index, callback);
981 } else {
982 MutexLocker mu(JvmtiThreadState_lock);
983 JvmtiEventControllerPrivate::set_extension_event_callback(env, extension_event_index, callback);
984 }
985 }
990 void
991 JvmtiEventController::set_frame_pop(JvmtiEnvThreadState *ets, JvmtiFramePop fpop) {
992 MutexLocker mu(JvmtiThreadState_lock);
993 JvmtiEventControllerPrivate::set_frame_pop(ets, fpop);
994 }
997 void
998 JvmtiEventController::clear_frame_pop(JvmtiEnvThreadState *ets, JvmtiFramePop fpop) {
999 MutexLocker mu(JvmtiThreadState_lock);
1000 JvmtiEventControllerPrivate::clear_frame_pop(ets, fpop);
1001 }
1004 void
1005 JvmtiEventController::clear_to_frame_pop(JvmtiEnvThreadState *ets, JvmtiFramePop fpop) {
1006 MutexLocker mu(JvmtiThreadState_lock);
1007 JvmtiEventControllerPrivate::clear_to_frame_pop(ets, fpop);
1008 }
1010 void
1011 JvmtiEventController::change_field_watch(jvmtiEvent event_type, bool added) {
1012 MutexLocker mu(JvmtiThreadState_lock);
1013 JvmtiEventControllerPrivate::change_field_watch(event_type, added);
1014 }
1016 void
1017 JvmtiEventController::thread_started(JavaThread *thread) {
1018 // operates only on the current thread
1019 // JvmtiThreadState_lock grabbed only if needed.
1020 JvmtiEventControllerPrivate::thread_started(thread);
1021 }
1023 void
1024 JvmtiEventController::thread_ended(JavaThread *thread) {
1025 // operates only on the current thread
1026 // JvmtiThreadState_lock grabbed only if needed.
1027 JvmtiEventControllerPrivate::thread_ended(thread);
1028 }
1030 void
1031 JvmtiEventController::env_initialize(JvmtiEnvBase *env) {
1032 if (Threads::number_of_threads() == 0) {
1033 // during early VM start-up locks don't exist, but we are safely single threaded,
1034 // call the functionality without holding the JvmtiThreadState_lock.
1035 JvmtiEventControllerPrivate::env_initialize(env);
1036 } else {
1037 MutexLocker mu(JvmtiThreadState_lock);
1038 JvmtiEventControllerPrivate::env_initialize(env);
1039 }
1040 }
1042 void
1043 JvmtiEventController::env_dispose(JvmtiEnvBase *env) {
1044 if (Threads::number_of_threads() == 0) {
1045 // during early VM start-up locks don't exist, but we are safely single threaded,
1046 // call the functionality without holding the JvmtiThreadState_lock.
1047 JvmtiEventControllerPrivate::env_dispose(env);
1048 } else {
1049 MutexLocker mu(JvmtiThreadState_lock);
1050 JvmtiEventControllerPrivate::env_dispose(env);
1051 }
1052 }
1055 void
1056 JvmtiEventController::vm_start() {
1057 if (JvmtiEnvBase::environments_might_exist()) {
1058 MutexLocker mu(JvmtiThreadState_lock);
1059 JvmtiEventControllerPrivate::vm_start();
1060 }
1061 }
1063 void
1064 JvmtiEventController::vm_init() {
1065 if (JvmtiEnvBase::environments_might_exist()) {
1066 MutexLocker mu(JvmtiThreadState_lock);
1067 JvmtiEventControllerPrivate::vm_init();
1068 }
1069 }
1071 void
1072 JvmtiEventController::vm_death() {
1073 if (JvmtiEnvBase::environments_might_exist()) {
1074 MutexLocker mu(JvmtiThreadState_lock);
1075 JvmtiEventControllerPrivate::vm_death();
1076 }
1077 }
