1 | /* |
2 | * Copyright (c) 2003, 2019, 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 "interpreter/interpreter.hpp" |
27 | #include "jvmtifiles/jvmtiEnv.hpp" |
28 | #include "logging/log.hpp" |
29 | #include "memory/resourceArea.hpp" |
30 | #include "prims/jvmtiEventController.hpp" |
31 | #include "prims/jvmtiEventController.inline.hpp" |
32 | #include "prims/jvmtiExport.hpp" |
33 | #include "prims/jvmtiImpl.hpp" |
34 | #include "prims/jvmtiThreadState.inline.hpp" |
35 | #include "runtime/frame.hpp" |
36 | #include "runtime/thread.inline.hpp" |
37 | #include "runtime/threadSMR.hpp" |
38 | #include "runtime/vframe.hpp" |
39 | #include "runtime/vframe_hp.hpp" |
40 | #include "runtime/vmThread.hpp" |
41 | #include "runtime/vmOperations.hpp" |
42 | |
43 | #ifdef JVMTI_TRACE |
44 | #define EC_TRACE(out) do { \ |
45 | if (JvmtiTrace::trace_event_controller()) { \ |
46 | SafeResourceMark rm; \ |
47 | log_trace(jvmti) out; \ |
48 | } \ |
49 | } while (0) |
50 | #else |
51 | #define EC_TRACE(out) |
52 | #endif /*JVMTI_TRACE */ |
53 | |
54 | // bits for standard events |
55 | |
56 | static const jlong SINGLE_STEP_BIT = (((jlong)1) << (JVMTI_EVENT_SINGLE_STEP - TOTAL_MIN_EVENT_TYPE_VAL)); |
57 | static const jlong FRAME_POP_BIT = (((jlong)1) << (JVMTI_EVENT_FRAME_POP - TOTAL_MIN_EVENT_TYPE_VAL)); |
58 | static const jlong BREAKPOINT_BIT = (((jlong)1) << (JVMTI_EVENT_BREAKPOINT - TOTAL_MIN_EVENT_TYPE_VAL)); |
59 | static const jlong FIELD_ACCESS_BIT = (((jlong)1) << (JVMTI_EVENT_FIELD_ACCESS - TOTAL_MIN_EVENT_TYPE_VAL)); |
60 | static const jlong FIELD_MODIFICATION_BIT = (((jlong)1) << (JVMTI_EVENT_FIELD_MODIFICATION - TOTAL_MIN_EVENT_TYPE_VAL)); |
61 | static const jlong METHOD_ENTRY_BIT = (((jlong)1) << (JVMTI_EVENT_METHOD_ENTRY - TOTAL_MIN_EVENT_TYPE_VAL)); |
62 | static const jlong METHOD_EXIT_BIT = (((jlong)1) << (JVMTI_EVENT_METHOD_EXIT - TOTAL_MIN_EVENT_TYPE_VAL)); |
63 | static const jlong CLASS_FILE_LOAD_HOOK_BIT = (((jlong)1) << (JVMTI_EVENT_CLASS_FILE_LOAD_HOOK - TOTAL_MIN_EVENT_TYPE_VAL)); |
64 | static const jlong NATIVE_METHOD_BIND_BIT = (((jlong)1) << (JVMTI_EVENT_NATIVE_METHOD_BIND - TOTAL_MIN_EVENT_TYPE_VAL)); |
65 | static const jlong VM_START_BIT = (((jlong)1) << (JVMTI_EVENT_VM_START - TOTAL_MIN_EVENT_TYPE_VAL)); |
66 | static const jlong VM_INIT_BIT = (((jlong)1) << (JVMTI_EVENT_VM_INIT - TOTAL_MIN_EVENT_TYPE_VAL)); |
67 | static const jlong VM_DEATH_BIT = (((jlong)1) << (JVMTI_EVENT_VM_DEATH - TOTAL_MIN_EVENT_TYPE_VAL)); |
68 | static const jlong CLASS_LOAD_BIT = (((jlong)1) << (JVMTI_EVENT_CLASS_LOAD - TOTAL_MIN_EVENT_TYPE_VAL)); |
69 | static const jlong CLASS_PREPARE_BIT = (((jlong)1) << (JVMTI_EVENT_CLASS_PREPARE - TOTAL_MIN_EVENT_TYPE_VAL)); |
70 | static const jlong THREAD_START_BIT = (((jlong)1) << (JVMTI_EVENT_THREAD_START - TOTAL_MIN_EVENT_TYPE_VAL)); |
71 | static const jlong THREAD_END_BIT = (((jlong)1) << (JVMTI_EVENT_THREAD_END - TOTAL_MIN_EVENT_TYPE_VAL)); |
72 | static const jlong EXCEPTION_THROW_BIT = (((jlong)1) << (JVMTI_EVENT_EXCEPTION - TOTAL_MIN_EVENT_TYPE_VAL)); |
73 | static const jlong EXCEPTION_CATCH_BIT = (((jlong)1) << (JVMTI_EVENT_EXCEPTION_CATCH - TOTAL_MIN_EVENT_TYPE_VAL)); |
74 | static const jlong MONITOR_CONTENDED_ENTER_BIT = (((jlong)1) << (JVMTI_EVENT_MONITOR_CONTENDED_ENTER - TOTAL_MIN_EVENT_TYPE_VAL)); |
75 | static const jlong MONITOR_CONTENDED_ENTERED_BIT = (((jlong)1) << (JVMTI_EVENT_MONITOR_CONTENDED_ENTERED - TOTAL_MIN_EVENT_TYPE_VAL)); |
76 | static const jlong MONITOR_WAIT_BIT = (((jlong)1) << (JVMTI_EVENT_MONITOR_WAIT - TOTAL_MIN_EVENT_TYPE_VAL)); |
77 | static const jlong MONITOR_WAITED_BIT = (((jlong)1) << (JVMTI_EVENT_MONITOR_WAITED - TOTAL_MIN_EVENT_TYPE_VAL)); |
78 | static const jlong DYNAMIC_CODE_GENERATED_BIT = (((jlong)1) << (JVMTI_EVENT_DYNAMIC_CODE_GENERATED - TOTAL_MIN_EVENT_TYPE_VAL)); |
79 | static const jlong DATA_DUMP_BIT = (((jlong)1) << (JVMTI_EVENT_DATA_DUMP_REQUEST - TOTAL_MIN_EVENT_TYPE_VAL)); |
80 | static const jlong COMPILED_METHOD_LOAD_BIT = (((jlong)1) << (JVMTI_EVENT_COMPILED_METHOD_LOAD - TOTAL_MIN_EVENT_TYPE_VAL)); |
81 | static const jlong COMPILED_METHOD_UNLOAD_BIT = (((jlong)1) << (JVMTI_EVENT_COMPILED_METHOD_UNLOAD - TOTAL_MIN_EVENT_TYPE_VAL)); |
82 | static const jlong GARBAGE_COLLECTION_START_BIT = (((jlong)1) << (JVMTI_EVENT_GARBAGE_COLLECTION_START - TOTAL_MIN_EVENT_TYPE_VAL)); |
83 | static const jlong GARBAGE_COLLECTION_FINISH_BIT = (((jlong)1) << (JVMTI_EVENT_GARBAGE_COLLECTION_FINISH - TOTAL_MIN_EVENT_TYPE_VAL)); |
84 | static const jlong OBJECT_FREE_BIT = (((jlong)1) << (JVMTI_EVENT_OBJECT_FREE - TOTAL_MIN_EVENT_TYPE_VAL)); |
85 | static const jlong RESOURCE_EXHAUSTED_BIT = (((jlong)1) << (JVMTI_EVENT_RESOURCE_EXHAUSTED - TOTAL_MIN_EVENT_TYPE_VAL)); |
86 | static const jlong VM_OBJECT_ALLOC_BIT = (((jlong)1) << (JVMTI_EVENT_VM_OBJECT_ALLOC - TOTAL_MIN_EVENT_TYPE_VAL)); |
87 | static const jlong SAMPLED_OBJECT_ALLOC_BIT = (((jlong)1) << (JVMTI_EVENT_SAMPLED_OBJECT_ALLOC - TOTAL_MIN_EVENT_TYPE_VAL)); |
88 | |
89 | // bits for extension events |
90 | static const jlong CLASS_UNLOAD_BIT = (((jlong)1) << (EXT_EVENT_CLASS_UNLOAD - TOTAL_MIN_EVENT_TYPE_VAL)); |
91 | |
92 | |
93 | static const jlong MONITOR_BITS = MONITOR_CONTENDED_ENTER_BIT | MONITOR_CONTENDED_ENTERED_BIT | |
94 | MONITOR_WAIT_BIT | MONITOR_WAITED_BIT; |
95 | static const jlong EXCEPTION_BITS = EXCEPTION_THROW_BIT | EXCEPTION_CATCH_BIT; |
96 | static const jlong INTERP_EVENT_BITS = SINGLE_STEP_BIT | METHOD_ENTRY_BIT | METHOD_EXIT_BIT | |
97 | FRAME_POP_BIT | FIELD_ACCESS_BIT | FIELD_MODIFICATION_BIT; |
98 | static const jlong THREAD_FILTERED_EVENT_BITS = INTERP_EVENT_BITS | EXCEPTION_BITS | MONITOR_BITS | |
99 | BREAKPOINT_BIT | CLASS_LOAD_BIT | CLASS_PREPARE_BIT | THREAD_END_BIT | |
100 | SAMPLED_OBJECT_ALLOC_BIT; |
101 | static const jlong NEED_THREAD_LIFE_EVENTS = THREAD_FILTERED_EVENT_BITS | THREAD_START_BIT; |
102 | static const jlong EARLY_EVENT_BITS = CLASS_FILE_LOAD_HOOK_BIT | CLASS_LOAD_BIT | CLASS_PREPARE_BIT | |
103 | VM_START_BIT | VM_INIT_BIT | VM_DEATH_BIT | NATIVE_METHOD_BIND_BIT | |
104 | THREAD_START_BIT | THREAD_END_BIT | |
105 | COMPILED_METHOD_LOAD_BIT | COMPILED_METHOD_UNLOAD_BIT | |
106 | DYNAMIC_CODE_GENERATED_BIT; |
107 | static const jlong GLOBAL_EVENT_BITS = ~THREAD_FILTERED_EVENT_BITS; |
108 | static const jlong SHOULD_POST_ON_EXCEPTIONS_BITS = EXCEPTION_BITS | METHOD_EXIT_BIT | FRAME_POP_BIT; |
109 | |
110 | /////////////////////////////////////////////////////////////// |
111 | // |
112 | // JvmtiEventEnabled |
113 | // |
114 | |
115 | JvmtiEventEnabled::JvmtiEventEnabled() { |
116 | clear(); |
117 | } |
118 | |
119 | |
120 | void JvmtiEventEnabled::clear() { |
121 | _enabled_bits = 0; |
122 | #ifndef PRODUCT |
123 | _init_guard = JEE_INIT_GUARD; |
124 | #endif |
125 | } |
126 | |
127 | void JvmtiEventEnabled::set_enabled(jvmtiEvent event_type, bool enabled) { |
128 | jlong bits = get_bits(); |
129 | jlong mask = bit_for(event_type); |
130 | if (enabled) { |
131 | bits |= mask; |
132 | } else { |
133 | bits &= ~mask; |
134 | } |
135 | set_bits(bits); |
136 | } |
137 | |
138 | |
139 | /////////////////////////////////////////////////////////////// |
140 | // |
141 | // JvmtiEnvThreadEventEnable |
142 | // |
143 | |
144 | JvmtiEnvThreadEventEnable::JvmtiEnvThreadEventEnable() { |
145 | _event_user_enabled.clear(); |
146 | _event_enabled.clear(); |
147 | } |
148 | |
149 | |
150 | JvmtiEnvThreadEventEnable::~JvmtiEnvThreadEventEnable() { |
151 | _event_user_enabled.clear(); |
152 | _event_enabled.clear(); |
153 | } |
154 | |
155 | |
156 | /////////////////////////////////////////////////////////////// |
157 | // |
158 | // JvmtiThreadEventEnable |
159 | // |
160 | |
161 | JvmtiThreadEventEnable::JvmtiThreadEventEnable() { |
162 | _event_enabled.clear(); |
163 | } |
164 | |
165 | |
166 | JvmtiThreadEventEnable::~JvmtiThreadEventEnable() { |
167 | _event_enabled.clear(); |
168 | } |
169 | |
170 | |
171 | /////////////////////////////////////////////////////////////// |
172 | // |
173 | // JvmtiEnvEventEnable |
174 | // |
175 | |
176 | JvmtiEnvEventEnable::JvmtiEnvEventEnable() { |
177 | _event_user_enabled.clear(); |
178 | _event_callback_enabled.clear(); |
179 | _event_enabled.clear(); |
180 | } |
181 | |
182 | |
183 | JvmtiEnvEventEnable::~JvmtiEnvEventEnable() { |
184 | _event_user_enabled.clear(); |
185 | _event_callback_enabled.clear(); |
186 | _event_enabled.clear(); |
187 | } |
188 | |
189 | |
190 | /////////////////////////////////////////////////////////////// |
191 | // |
192 | // VM_EnterInterpOnlyMode |
193 | // |
194 | |
195 | class VM_EnterInterpOnlyMode : public VM_Operation { |
196 | private: |
197 | JvmtiThreadState *_state; |
198 | |
199 | public: |
200 | VM_EnterInterpOnlyMode(JvmtiThreadState *state); |
201 | |
202 | bool allow_nested_vm_operations() const { return true; } |
203 | VMOp_Type type() const { return VMOp_EnterInterpOnlyMode; } |
204 | void doit(); |
205 | |
206 | // to do: this same function is in jvmtiImpl - should be in one place |
207 | bool can_be_deoptimized(vframe* vf) { |
208 | return (vf->is_compiled_frame() && vf->fr().can_be_deoptimized()); |
209 | } |
210 | }; |
211 | |
212 | VM_EnterInterpOnlyMode::VM_EnterInterpOnlyMode(JvmtiThreadState *state) |
213 | : _state(state) |
214 | { |
215 | } |
216 | |
217 | |
218 | void VM_EnterInterpOnlyMode::doit() { |
219 | // Set up the current stack depth for later tracking |
220 | _state->invalidate_cur_stack_depth(); |
221 | |
222 | _state->enter_interp_only_mode(); |
223 | |
224 | JavaThread *thread = _state->get_thread(); |
225 | if (thread->has_last_Java_frame()) { |
226 | // If running in fullspeed mode, single stepping is implemented |
227 | // as follows: first, the interpreter does not dispatch to |
228 | // compiled code for threads that have single stepping enabled; |
229 | // second, we deoptimize all methods on the thread's stack when |
230 | // interpreted-only mode is enabled the first time for a given |
231 | // thread (nothing to do if no Java frames yet). |
232 | int num_marked = 0; |
233 | ResourceMark resMark; |
234 | RegisterMap rm(thread, false); |
235 | for (vframe* vf = thread->last_java_vframe(&rm); vf; vf = vf->sender()) { |
236 | if (can_be_deoptimized(vf)) { |
237 | ((compiledVFrame*) vf)->code()->mark_for_deoptimization(); |
238 | ++num_marked; |
239 | } |
240 | } |
241 | if (num_marked > 0) { |
242 | VM_Deoptimize op; |
243 | VMThread::execute(&op); |
244 | } |
245 | } |
246 | } |
247 | |
248 | |
249 | /////////////////////////////////////////////////////////////// |
250 | // |
251 | // VM_ChangeSingleStep |
252 | // |
253 | |
254 | class VM_ChangeSingleStep : public VM_Operation { |
255 | private: |
256 | bool _on; |
257 | |
258 | public: |
259 | VM_ChangeSingleStep(bool on); |
260 | VMOp_Type type() const { return VMOp_ChangeSingleStep; } |
261 | bool allow_nested_vm_operations() const { return true; } |
262 | void doit(); // method definition is after definition of JvmtiEventControllerPrivate because of scoping |
263 | }; |
264 | |
265 | |
266 | VM_ChangeSingleStep::VM_ChangeSingleStep(bool on) |
267 | : _on(on) |
268 | { |
269 | } |
270 | |
271 | |
272 | |
273 | |
274 | /////////////////////////////////////////////////////////////// |
275 | // |
276 | // JvmtiEventControllerPrivate |
277 | // |
278 | // Private internal implementation methods for JvmtiEventController. |
279 | // |
280 | // These methods are thread safe either because they are called |
281 | // in early VM initialization which is single threaded, or they |
282 | // hold the JvmtiThreadState_lock. |
283 | // |
284 | |
285 | class JvmtiEventControllerPrivate : public AllStatic { |
286 | static bool _initialized; |
287 | public: |
288 | static void set_should_post_single_step(bool on); |
289 | static void enter_interp_only_mode(JvmtiThreadState *state); |
290 | static void leave_interp_only_mode(JvmtiThreadState *state); |
291 | static void recompute_enabled(); |
292 | static jlong recompute_env_enabled(JvmtiEnvBase* env); |
293 | static jlong recompute_env_thread_enabled(JvmtiEnvThreadState* ets, JvmtiThreadState* state); |
294 | static jlong recompute_thread_enabled(JvmtiThreadState *state); |
295 | static void event_init(); |
296 | |
297 | static void set_user_enabled(JvmtiEnvBase *env, JavaThread *thread, |
298 | jvmtiEvent event_type, bool enabled); |
299 | static void set_event_callbacks(JvmtiEnvBase *env, |
300 | const jvmtiEventCallbacks* callbacks, |
301 | jint size_of_callbacks); |
302 | |
303 | static void set_extension_event_callback(JvmtiEnvBase *env, |
304 | jint extension_event_index, |
305 | jvmtiExtensionEvent callback); |
306 | |
307 | static void set_frame_pop(JvmtiEnvThreadState *env_thread, JvmtiFramePop fpop); |
308 | static void clear_frame_pop(JvmtiEnvThreadState *env_thread, JvmtiFramePop fpop); |
309 | static void clear_to_frame_pop(JvmtiEnvThreadState *env_thread, JvmtiFramePop fpop); |
310 | static void change_field_watch(jvmtiEvent event_type, bool added); |
311 | |
312 | static void thread_started(JavaThread *thread); |
313 | static void thread_ended(JavaThread *thread); |
314 | |
315 | static void env_initialize(JvmtiEnvBase *env); |
316 | static void env_dispose(JvmtiEnvBase *env); |
317 | |
318 | static void vm_start(); |
319 | static void vm_init(); |
320 | static void vm_death(); |
321 | |
322 | static void trace_changed(JvmtiThreadState *state, jlong now_enabled, jlong changed); |
323 | static void trace_changed(jlong now_enabled, jlong changed); |
324 | }; |
325 | |
326 | bool JvmtiEventControllerPrivate::_initialized = false; |
327 | |
328 | void JvmtiEventControllerPrivate::set_should_post_single_step(bool on) { |
329 | // we have permission to do this, VM op doesn't |
330 | JvmtiExport::set_should_post_single_step(on); |
331 | } |
332 | |
333 | |
334 | // When _on == true, we use the safepoint interpreter dispatch table |
335 | // to allow us to find the single step points. Otherwise, we switch |
336 | // back to the regular interpreter dispatch table. |
337 | // Note: We call Interpreter::notice_safepoints() and ignore_safepoints() |
338 | // in a VM_Operation to safely make the dispatch table switch. We |
339 | // no longer rely on the safepoint mechanism to do any of this work |
340 | // for us. |
341 | void VM_ChangeSingleStep::doit() { |
342 | log_debug(interpreter, safepoint)("changing single step to '%s'" , _on ? "on" : "off" ); |
343 | JvmtiEventControllerPrivate::set_should_post_single_step(_on); |
344 | if (_on) { |
345 | Interpreter::notice_safepoints(); |
346 | } else { |
347 | Interpreter::ignore_safepoints(); |
348 | } |
349 | } |
350 | |
351 | |
352 | void JvmtiEventControllerPrivate::enter_interp_only_mode(JvmtiThreadState *state) { |
353 | EC_TRACE(("[%s] # Entering interpreter only mode" , |
354 | JvmtiTrace::safe_get_thread_name(state->get_thread()))); |
355 | |
356 | VM_EnterInterpOnlyMode op(state); |
357 | VMThread::execute(&op); |
358 | } |
359 | |
360 | |
361 | void |
362 | JvmtiEventControllerPrivate::leave_interp_only_mode(JvmtiThreadState *state) { |
363 | EC_TRACE(("[%s] # Leaving interpreter only mode" , |
364 | JvmtiTrace::safe_get_thread_name(state->get_thread()))); |
365 | state->leave_interp_only_mode(); |
366 | } |
367 | |
368 | |
369 | void |
370 | JvmtiEventControllerPrivate::trace_changed(JvmtiThreadState *state, jlong now_enabled, jlong changed) { |
371 | #ifdef JVMTI_TRACE |
372 | if (JvmtiTrace::trace_event_controller()) { |
373 | SafeResourceMark rm; |
374 | // traces standard events only |
375 | for (int ei = JVMTI_MIN_EVENT_TYPE_VAL; ei <= JVMTI_MAX_EVENT_TYPE_VAL; ++ei) { |
376 | jlong bit = JvmtiEventEnabled::bit_for((jvmtiEvent)ei); |
377 | if (changed & bit) { |
378 | // it changed, print it |
379 | log_trace(jvmti)("[%s] # %s event %s" , |
380 | JvmtiTrace::safe_get_thread_name(state->get_thread()), |
381 | (now_enabled & bit)? "Enabling" : "Disabling" , JvmtiTrace::event_name((jvmtiEvent)ei)); |
382 | } |
383 | } |
384 | } |
385 | #endif /*JVMTI_TRACE */ |
386 | } |
387 | |
388 | |
389 | void |
390 | JvmtiEventControllerPrivate::trace_changed(jlong now_enabled, jlong changed) { |
391 | #ifdef JVMTI_TRACE |
392 | if (JvmtiTrace::trace_event_controller()) { |
393 | SafeResourceMark rm; |
394 | // traces standard events only |
395 | for (int ei = JVMTI_MIN_EVENT_TYPE_VAL; ei <= JVMTI_MAX_EVENT_TYPE_VAL; ++ei) { |
396 | jlong bit = JvmtiEventEnabled::bit_for((jvmtiEvent)ei); |
397 | if (changed & bit) { |
398 | // it changed, print it |
399 | log_trace(jvmti)("[-] # %s event %s" , |
400 | (now_enabled & bit)? "Enabling" : "Disabling" , JvmtiTrace::event_name((jvmtiEvent)ei)); |
401 | } |
402 | } |
403 | } |
404 | #endif /*JVMTI_TRACE */ |
405 | } |
406 | |
407 | |
408 | // For the specified env: compute the currently truly enabled events |
409 | // set external state accordingly. |
410 | // Return value and set value must include all events. |
411 | // But outside this class, only non-thread-filtered events can be queried.. |
412 | jlong |
413 | JvmtiEventControllerPrivate::recompute_env_enabled(JvmtiEnvBase* env) { |
414 | jlong was_enabled = env->env_event_enable()->_event_enabled.get_bits(); |
415 | jlong now_enabled = |
416 | env->env_event_enable()->_event_callback_enabled.get_bits() & |
417 | env->env_event_enable()->_event_user_enabled.get_bits(); |
418 | |
419 | switch (env->phase()) { |
420 | case JVMTI_PHASE_PRIMORDIAL: |
421 | case JVMTI_PHASE_ONLOAD: |
422 | // only these events allowed in primordial or onload phase |
423 | now_enabled &= (EARLY_EVENT_BITS & ~THREAD_FILTERED_EVENT_BITS); |
424 | break; |
425 | case JVMTI_PHASE_START: |
426 | // only these events allowed in start phase |
427 | now_enabled &= EARLY_EVENT_BITS; |
428 | break; |
429 | case JVMTI_PHASE_LIVE: |
430 | // all events allowed during live phase |
431 | break; |
432 | case JVMTI_PHASE_DEAD: |
433 | // no events allowed when dead |
434 | now_enabled = 0; |
435 | break; |
436 | default: |
437 | assert(false, "no other phases - sanity check" ); |
438 | break; |
439 | } |
440 | |
441 | // will we really send these events to this env |
442 | env->env_event_enable()->_event_enabled.set_bits(now_enabled); |
443 | |
444 | trace_changed(now_enabled, (now_enabled ^ was_enabled) & ~THREAD_FILTERED_EVENT_BITS); |
445 | |
446 | return now_enabled; |
447 | } |
448 | |
449 | |
450 | // For the specified env and thread: compute the currently truly enabled events |
451 | // set external state accordingly. Only thread-filtered events are included. |
452 | jlong |
453 | JvmtiEventControllerPrivate::recompute_env_thread_enabled(JvmtiEnvThreadState* ets, JvmtiThreadState* state) { |
454 | JvmtiEnv *env = ets->get_env(); |
455 | |
456 | jlong was_enabled = ets->event_enable()->_event_enabled.get_bits(); |
457 | jlong now_enabled = THREAD_FILTERED_EVENT_BITS & |
458 | env->env_event_enable()->_event_callback_enabled.get_bits() & |
459 | (env->env_event_enable()->_event_user_enabled.get_bits() | |
460 | ets->event_enable()->_event_user_enabled.get_bits()); |
461 | |
462 | // for frame pops and field watchs, computed enabled state |
463 | // is only true if an event has been requested |
464 | if (!ets->has_frame_pops()) { |
465 | now_enabled &= ~FRAME_POP_BIT; |
466 | } |
467 | if (*((int *)JvmtiExport::get_field_access_count_addr()) == 0) { |
468 | now_enabled &= ~FIELD_ACCESS_BIT; |
469 | } |
470 | if (*((int *)JvmtiExport::get_field_modification_count_addr()) == 0) { |
471 | now_enabled &= ~FIELD_MODIFICATION_BIT; |
472 | } |
473 | |
474 | switch (JvmtiEnv::get_phase()) { |
475 | case JVMTI_PHASE_DEAD: |
476 | // no events allowed when dead |
477 | now_enabled = 0; |
478 | break; |
479 | default: |
480 | break; |
481 | } |
482 | |
483 | // if anything changed do update |
484 | if (now_enabled != was_enabled) { |
485 | |
486 | // will we really send these events to this thread x env |
487 | ets->event_enable()->_event_enabled.set_bits(now_enabled); |
488 | |
489 | // If the enabled status of the single step or breakpoint events changed, |
490 | // the location status may need to change as well. |
491 | jlong changed = now_enabled ^ was_enabled; |
492 | if (changed & SINGLE_STEP_BIT) { |
493 | ets->reset_current_location(JVMTI_EVENT_SINGLE_STEP, (now_enabled & SINGLE_STEP_BIT) != 0); |
494 | } |
495 | if (changed & BREAKPOINT_BIT) { |
496 | ets->reset_current_location(JVMTI_EVENT_BREAKPOINT, (now_enabled & BREAKPOINT_BIT) != 0); |
497 | } |
498 | trace_changed(state, now_enabled, changed); |
499 | } |
500 | return now_enabled; |
501 | } |
502 | |
503 | |
504 | // For the specified thread: compute the currently truly enabled events |
505 | // set external state accordingly. Only thread-filtered events are included. |
506 | jlong |
507 | JvmtiEventControllerPrivate::recompute_thread_enabled(JvmtiThreadState *state) { |
508 | if (state == NULL) { |
509 | // associated JavaThread is exiting |
510 | return (jlong)0; |
511 | } |
512 | |
513 | julong was_any_env_enabled = state->thread_event_enable()->_event_enabled.get_bits(); |
514 | julong any_env_enabled = 0; |
515 | // JVMTI_EVENT_FRAME_POP can be disabled (in the case FRAME_POP_BIT is not set), |
516 | // but we need to set interp_only if some JvmtiEnvThreadState has frame pop set |
517 | // to clear the request |
518 | bool has_frame_pops = false; |
519 | |
520 | { |
521 | // This iteration will include JvmtiEnvThreadStates whose environments |
522 | // have been disposed. These JvmtiEnvThreadStates must not be filtered |
523 | // as recompute must be called on them to disable their events, |
524 | JvmtiEnvThreadStateIterator it(state); |
525 | for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { |
526 | any_env_enabled |= recompute_env_thread_enabled(ets, state); |
527 | has_frame_pops |= ets->has_frame_pops(); |
528 | } |
529 | } |
530 | |
531 | if (any_env_enabled != was_any_env_enabled) { |
532 | // mark if event is truly enabled on this thread in any environment |
533 | state->thread_event_enable()->_event_enabled.set_bits(any_env_enabled); |
534 | |
535 | // update the JavaThread cached value for thread-specific should_post_on_exceptions value |
536 | bool should_post_on_exceptions = (any_env_enabled & SHOULD_POST_ON_EXCEPTIONS_BITS) != 0; |
537 | state->set_should_post_on_exceptions(should_post_on_exceptions); |
538 | } |
539 | |
540 | // compute interp_only mode |
541 | bool should_be_interp = (any_env_enabled & INTERP_EVENT_BITS) != 0 || has_frame_pops; |
542 | bool is_now_interp = state->is_interp_only_mode(); |
543 | |
544 | if (should_be_interp != is_now_interp) { |
545 | if (should_be_interp) { |
546 | enter_interp_only_mode(state); |
547 | } else { |
548 | leave_interp_only_mode(state); |
549 | } |
550 | } |
551 | |
552 | return any_env_enabled; |
553 | } |
554 | |
555 | |
556 | // Compute truly enabled events - meaning if the event can and could be |
557 | // sent. An event is truly enabled if it is user enabled on the thread |
558 | // or globally user enabled, but only if there is a callback or event hook |
559 | // for it and, for field watch and frame pop, one has been set. |
560 | // Compute if truly enabled, per thread, per environment, per combination |
561 | // (thread x environment), and overall. These merges are true if any is true. |
562 | // True per thread if some environment has callback set and the event is globally |
563 | // enabled or enabled for this thread. |
564 | // True per environment if the callback is set and the event is globally |
565 | // enabled in this environment or enabled for any thread in this environment. |
566 | // True per combination if the environment has the callback set and the |
567 | // event is globally enabled in this environment or the event is enabled |
568 | // for this thread and environment. |
569 | // |
570 | // All states transitions dependent on these transitions are also handled here. |
571 | void |
572 | JvmtiEventControllerPrivate::recompute_enabled() { |
573 | assert(Threads::number_of_threads() == 0 || JvmtiThreadState_lock->is_locked(), "sanity check" ); |
574 | |
575 | // event enabled for any thread in any environment |
576 | julong was_any_env_thread_enabled = JvmtiEventController::_universal_global_event_enabled.get_bits(); |
577 | julong any_env_thread_enabled = 0; |
578 | |
579 | EC_TRACE(("[-] # recompute enabled - before " JULONG_FORMAT_X, was_any_env_thread_enabled)); |
580 | |
581 | // compute non-thread-filters events. |
582 | // This must be done separately from thread-filtered events, since some |
583 | // events can occur before any threads exist. |
584 | JvmtiEnvIterator it; |
585 | for (JvmtiEnvBase* env = it.first(); env != NULL; env = it.next(env)) { |
586 | any_env_thread_enabled |= recompute_env_enabled(env); |
587 | } |
588 | |
589 | // We need to create any missing jvmti_thread_state if there are globally set thread |
590 | // filtered events and there weren't last time |
591 | if ( (any_env_thread_enabled & THREAD_FILTERED_EVENT_BITS) != 0 && |
592 | (was_any_env_thread_enabled & THREAD_FILTERED_EVENT_BITS) == 0) { |
593 | for (JavaThreadIteratorWithHandle jtiwh; JavaThread *tp = jtiwh.next(); ) { |
594 | // state_for_while_locked() makes tp->is_exiting() check |
595 | JvmtiThreadState::state_for_while_locked(tp); // create the thread state if missing |
596 | } |
597 | } |
598 | |
599 | // compute and set thread-filtered events |
600 | for (JvmtiThreadState *state = JvmtiThreadState::first(); state != NULL; state = state->next()) { |
601 | any_env_thread_enabled |= recompute_thread_enabled(state); |
602 | } |
603 | |
604 | // set universal state (across all envs and threads) |
605 | jlong delta = any_env_thread_enabled ^ was_any_env_thread_enabled; |
606 | if (delta != 0) { |
607 | JvmtiExport::set_should_post_field_access((any_env_thread_enabled & FIELD_ACCESS_BIT) != 0); |
608 | JvmtiExport::set_should_post_field_modification((any_env_thread_enabled & FIELD_MODIFICATION_BIT) != 0); |
609 | JvmtiExport::set_should_post_class_load((any_env_thread_enabled & CLASS_LOAD_BIT) != 0); |
610 | JvmtiExport::set_should_post_class_file_load_hook((any_env_thread_enabled & CLASS_FILE_LOAD_HOOK_BIT) != 0); |
611 | JvmtiExport::set_should_post_native_method_bind((any_env_thread_enabled & NATIVE_METHOD_BIND_BIT) != 0); |
612 | JvmtiExport::set_should_post_dynamic_code_generated((any_env_thread_enabled & DYNAMIC_CODE_GENERATED_BIT) != 0); |
613 | JvmtiExport::set_should_post_data_dump((any_env_thread_enabled & DATA_DUMP_BIT) != 0); |
614 | JvmtiExport::set_should_post_class_prepare((any_env_thread_enabled & CLASS_PREPARE_BIT) != 0); |
615 | JvmtiExport::set_should_post_class_unload((any_env_thread_enabled & CLASS_UNLOAD_BIT) != 0); |
616 | JvmtiExport::set_should_post_monitor_contended_enter((any_env_thread_enabled & MONITOR_CONTENDED_ENTER_BIT) != 0); |
617 | JvmtiExport::set_should_post_monitor_contended_entered((any_env_thread_enabled & MONITOR_CONTENDED_ENTERED_BIT) != 0); |
618 | JvmtiExport::set_should_post_monitor_wait((any_env_thread_enabled & MONITOR_WAIT_BIT) != 0); |
619 | JvmtiExport::set_should_post_monitor_waited((any_env_thread_enabled & MONITOR_WAITED_BIT) != 0); |
620 | JvmtiExport::set_should_post_garbage_collection_start((any_env_thread_enabled & GARBAGE_COLLECTION_START_BIT) != 0); |
621 | JvmtiExport::set_should_post_garbage_collection_finish((any_env_thread_enabled & GARBAGE_COLLECTION_FINISH_BIT) != 0); |
622 | JvmtiExport::set_should_post_object_free((any_env_thread_enabled & OBJECT_FREE_BIT) != 0); |
623 | JvmtiExport::set_should_post_resource_exhausted((any_env_thread_enabled & RESOURCE_EXHAUSTED_BIT) != 0); |
624 | JvmtiExport::set_should_post_compiled_method_load((any_env_thread_enabled & COMPILED_METHOD_LOAD_BIT) != 0); |
625 | JvmtiExport::set_should_post_compiled_method_unload((any_env_thread_enabled & COMPILED_METHOD_UNLOAD_BIT) != 0); |
626 | JvmtiExport::set_should_post_vm_object_alloc((any_env_thread_enabled & VM_OBJECT_ALLOC_BIT) != 0); |
627 | JvmtiExport::set_should_post_sampled_object_alloc((any_env_thread_enabled & SAMPLED_OBJECT_ALLOC_BIT) != 0); |
628 | |
629 | // need this if we want thread events or we need them to init data |
630 | JvmtiExport::set_should_post_thread_life((any_env_thread_enabled & NEED_THREAD_LIFE_EVENTS) != 0); |
631 | |
632 | // If single stepping is turned on or off, execute the VM op to change it. |
633 | if (delta & SINGLE_STEP_BIT) { |
634 | switch (JvmtiEnv::get_phase()) { |
635 | case JVMTI_PHASE_DEAD: |
636 | // If the VM is dying we can't execute VM ops |
637 | break; |
638 | case JVMTI_PHASE_LIVE: { |
639 | VM_ChangeSingleStep op((any_env_thread_enabled & SINGLE_STEP_BIT) != 0); |
640 | VMThread::execute(&op); |
641 | break; |
642 | } |
643 | default: |
644 | assert(false, "should never come here before live phase" ); |
645 | break; |
646 | } |
647 | } |
648 | |
649 | // set global truly enabled, that is, any thread in any environment |
650 | JvmtiEventController::_universal_global_event_enabled.set_bits(any_env_thread_enabled); |
651 | |
652 | // set global should_post_on_exceptions |
653 | JvmtiExport::set_should_post_on_exceptions((any_env_thread_enabled & SHOULD_POST_ON_EXCEPTIONS_BITS) != 0); |
654 | |
655 | } |
656 | |
657 | EC_TRACE(("[-] # recompute enabled - after " JULONG_FORMAT_X, any_env_thread_enabled)); |
658 | } |
659 | |
660 | |
661 | void |
662 | JvmtiEventControllerPrivate::thread_started(JavaThread *thread) { |
663 | assert(thread->is_Java_thread(), "Must be JavaThread" ); |
664 | assert(thread == Thread::current(), "must be current thread" ); |
665 | assert(JvmtiEnvBase::environments_might_exist(), "to enter event controller, JVM TI environments must exist" ); |
666 | |
667 | EC_TRACE(("[%s] # thread started" , JvmtiTrace::safe_get_thread_name(thread))); |
668 | |
669 | // if we have any thread filtered events globally enabled, create/update the thread state |
670 | if ((JvmtiEventController::_universal_global_event_enabled.get_bits() & THREAD_FILTERED_EVENT_BITS) != 0) { |
671 | MutexLocker mu(JvmtiThreadState_lock); |
672 | // create the thread state if missing |
673 | JvmtiThreadState *state = JvmtiThreadState::state_for_while_locked(thread); |
674 | if (state != NULL) { // skip threads with no JVMTI thread state |
675 | recompute_thread_enabled(state); |
676 | } |
677 | } |
678 | } |
679 | |
680 | |
681 | void |
682 | JvmtiEventControllerPrivate::thread_ended(JavaThread *thread) { |
683 | // Removes the JvmtiThreadState associated with the specified thread. |
684 | // May be called after all environments have been disposed. |
685 | assert(JvmtiThreadState_lock->is_locked(), "sanity check" ); |
686 | |
687 | EC_TRACE(("[%s] # thread ended" , JvmtiTrace::safe_get_thread_name(thread))); |
688 | |
689 | JvmtiThreadState *state = thread->jvmti_thread_state(); |
690 | assert(state != NULL, "else why are we here?" ); |
691 | delete state; |
692 | } |
693 | |
694 | void JvmtiEventControllerPrivate::set_event_callbacks(JvmtiEnvBase *env, |
695 | const jvmtiEventCallbacks* callbacks, |
696 | jint size_of_callbacks) { |
697 | assert(Threads::number_of_threads() == 0 || JvmtiThreadState_lock->is_locked(), "sanity check" ); |
698 | EC_TRACE(("[*] # set event callbacks" )); |
699 | |
700 | env->set_event_callbacks(callbacks, size_of_callbacks); |
701 | jlong enabled_bits = 0; |
702 | for (int ei = JVMTI_MIN_EVENT_TYPE_VAL; ei <= JVMTI_MAX_EVENT_TYPE_VAL; ++ei) { |
703 | jvmtiEvent evt_t = (jvmtiEvent)ei; |
704 | if (env->has_callback(evt_t)) { |
705 | enabled_bits |= JvmtiEventEnabled::bit_for(evt_t); |
706 | } |
707 | } |
708 | env->env_event_enable()->_event_callback_enabled.set_bits(enabled_bits); |
709 | recompute_enabled(); |
710 | } |
711 | |
712 | void |
713 | JvmtiEventControllerPrivate::set_extension_event_callback(JvmtiEnvBase *env, |
714 | jint extension_event_index, |
715 | jvmtiExtensionEvent callback) |
716 | { |
717 | assert(Threads::number_of_threads() == 0 || JvmtiThreadState_lock->is_locked(), "sanity check" ); |
718 | EC_TRACE(("[*] # set extension event callback" )); |
719 | |
720 | // extension events are allocated below JVMTI_MIN_EVENT_TYPE_VAL |
721 | assert(extension_event_index >= (jint)EXT_MIN_EVENT_TYPE_VAL && |
722 | extension_event_index <= (jint)EXT_MAX_EVENT_TYPE_VAL, "sanity check" ); |
723 | |
724 | |
725 | // As the bits for both standard (jvmtiEvent) and extension |
726 | // (jvmtiExtEvents) are stored in the same word we cast here to |
727 | // jvmtiEvent to set/clear the bit for this extension event. |
728 | jvmtiEvent event_type = (jvmtiEvent)extension_event_index; |
729 | |
730 | // Prevent a possible race condition where events are re-enabled by a call to |
731 | // set event callbacks, where the DisposeEnvironment occurs after the boiler-plate |
732 | // environment check and before the lock is acquired. |
733 | // We can safely do the is_valid check now, as JvmtiThreadState_lock is held. |
734 | bool enabling = (callback != NULL) && (env->is_valid()); |
735 | env->env_event_enable()->set_user_enabled(event_type, enabling); |
736 | |
737 | // update the callback |
738 | jvmtiExtEventCallbacks* ext_callbacks = env->ext_callbacks(); |
739 | switch (extension_event_index) { |
740 | case EXT_EVENT_CLASS_UNLOAD : |
741 | ext_callbacks->ClassUnload = callback; |
742 | break; |
743 | default: |
744 | ShouldNotReachHere(); |
745 | } |
746 | |
747 | // update the callback enable/disable bit |
748 | jlong enabled_bits = env->env_event_enable()->_event_callback_enabled.get_bits(); |
749 | jlong bit_for = JvmtiEventEnabled::bit_for(event_type); |
750 | if (enabling) { |
751 | enabled_bits |= bit_for; |
752 | } else { |
753 | enabled_bits &= ~bit_for; |
754 | } |
755 | env->env_event_enable()->_event_callback_enabled.set_bits(enabled_bits); |
756 | |
757 | recompute_enabled(); |
758 | } |
759 | |
760 | |
761 | void |
762 | JvmtiEventControllerPrivate::env_initialize(JvmtiEnvBase *env) { |
763 | assert(Threads::number_of_threads() == 0 || JvmtiThreadState_lock->is_locked(), "sanity check" ); |
764 | EC_TRACE(("[*] # env initialize" )); |
765 | |
766 | if (JvmtiEnvBase::is_vm_live()) { |
767 | // if we didn't initialize event info already (this is a late |
768 | // launched environment), do it now. |
769 | event_init(); |
770 | } |
771 | |
772 | env->initialize(); |
773 | |
774 | // add the JvmtiEnvThreadState to each JvmtiThreadState |
775 | for (JvmtiThreadState *state = JvmtiThreadState::first(); state != NULL; state = state->next()) { |
776 | state->add_env(env); |
777 | assert((JvmtiEnv*)(state->env_thread_state(env)->get_env()) == env, "sanity check" ); |
778 | } |
779 | JvmtiEventControllerPrivate::recompute_enabled(); |
780 | } |
781 | |
782 | |
783 | void |
784 | JvmtiEventControllerPrivate::env_dispose(JvmtiEnvBase *env) { |
785 | assert(Threads::number_of_threads() == 0 || JvmtiThreadState_lock->is_locked(), "sanity check" ); |
786 | EC_TRACE(("[*] # env dispose" )); |
787 | |
788 | // Before the environment is marked disposed, disable all events on this |
789 | // environment (by zapping the callbacks). As a result, the disposed |
790 | // environment will not call event handlers. |
791 | set_event_callbacks(env, NULL, 0); |
792 | for (jint extension_event_index = EXT_MIN_EVENT_TYPE_VAL; |
793 | extension_event_index <= EXT_MAX_EVENT_TYPE_VAL; |
794 | ++extension_event_index) { |
795 | set_extension_event_callback(env, extension_event_index, NULL); |
796 | } |
797 | |
798 | // Let the environment finish disposing itself. |
799 | env->env_dispose(); |
800 | } |
801 | |
802 | |
803 | void |
804 | JvmtiEventControllerPrivate::set_user_enabled(JvmtiEnvBase *env, JavaThread *thread, |
805 | jvmtiEvent event_type, bool enabled) { |
806 | assert(Threads::number_of_threads() == 0 || JvmtiThreadState_lock->is_locked(), "sanity check" ); |
807 | |
808 | EC_TRACE(("[%s] # user %s event %s" , |
809 | thread==NULL? "ALL" : JvmtiTrace::safe_get_thread_name(thread), |
810 | enabled? "enabled" : "disabled" , JvmtiTrace::event_name(event_type))); |
811 | |
812 | if (thread == NULL) { |
813 | env->env_event_enable()->set_user_enabled(event_type, enabled); |
814 | } else { |
815 | // create the thread state (if it didn't exist before) |
816 | JvmtiThreadState *state = JvmtiThreadState::state_for_while_locked(thread); |
817 | if (state != NULL) { |
818 | state->env_thread_state(env)->event_enable()->set_user_enabled(event_type, enabled); |
819 | } |
820 | } |
821 | recompute_enabled(); |
822 | } |
823 | |
824 | |
825 | void |
826 | JvmtiEventControllerPrivate::set_frame_pop(JvmtiEnvThreadState *ets, JvmtiFramePop fpop) { |
827 | EC_TRACE(("[%s] # set frame pop - frame=%d" , |
828 | JvmtiTrace::safe_get_thread_name(ets->get_thread()), |
829 | fpop.frame_number() )); |
830 | |
831 | ets->get_frame_pops()->set(fpop); |
832 | recompute_thread_enabled(ets->get_thread()->jvmti_thread_state()); |
833 | } |
834 | |
835 | |
836 | void |
837 | JvmtiEventControllerPrivate::clear_frame_pop(JvmtiEnvThreadState *ets, JvmtiFramePop fpop) { |
838 | EC_TRACE(("[%s] # clear frame pop - frame=%d" , |
839 | JvmtiTrace::safe_get_thread_name(ets->get_thread()), |
840 | fpop.frame_number() )); |
841 | |
842 | ets->get_frame_pops()->clear(fpop); |
843 | recompute_thread_enabled(ets->get_thread()->jvmti_thread_state()); |
844 | } |
845 | |
846 | |
847 | void |
848 | JvmtiEventControllerPrivate::clear_to_frame_pop(JvmtiEnvThreadState *ets, JvmtiFramePop fpop) { |
849 | int cleared_cnt = ets->get_frame_pops()->clear_to(fpop); |
850 | |
851 | EC_TRACE(("[%s] # clear to frame pop - frame=%d, count=%d" , |
852 | JvmtiTrace::safe_get_thread_name(ets->get_thread()), |
853 | fpop.frame_number(), |
854 | cleared_cnt )); |
855 | |
856 | if (cleared_cnt > 0) { |
857 | recompute_thread_enabled(ets->get_thread()->jvmti_thread_state()); |
858 | } |
859 | } |
860 | |
861 | void |
862 | JvmtiEventControllerPrivate::change_field_watch(jvmtiEvent event_type, bool added) { |
863 | int *count_addr; |
864 | |
865 | switch (event_type) { |
866 | case JVMTI_EVENT_FIELD_MODIFICATION: |
867 | count_addr = (int *)JvmtiExport::get_field_modification_count_addr(); |
868 | break; |
869 | case JVMTI_EVENT_FIELD_ACCESS: |
870 | count_addr = (int *)JvmtiExport::get_field_access_count_addr(); |
871 | break; |
872 | default: |
873 | assert(false, "incorrect event" ); |
874 | return; |
875 | } |
876 | |
877 | EC_TRACE(("[-] # change field watch - %s %s count=%d" , |
878 | event_type==JVMTI_EVENT_FIELD_MODIFICATION? "modification" : "access" , |
879 | added? "add" : "remove" , |
880 | *count_addr)); |
881 | |
882 | if (added) { |
883 | (*count_addr)++; |
884 | if (*count_addr == 1) { |
885 | recompute_enabled(); |
886 | } |
887 | } else { |
888 | if (*count_addr > 0) { |
889 | (*count_addr)--; |
890 | if (*count_addr == 0) { |
891 | recompute_enabled(); |
892 | } |
893 | } else { |
894 | assert(false, "field watch out of phase" ); |
895 | } |
896 | } |
897 | } |
898 | |
899 | void |
900 | JvmtiEventControllerPrivate::event_init() { |
901 | assert(JvmtiThreadState_lock->is_locked(), "sanity check" ); |
902 | |
903 | if (_initialized) { |
904 | return; |
905 | } |
906 | |
907 | EC_TRACE(("[-] # VM live" )); |
908 | |
909 | #ifdef ASSERT |
910 | // check that our idea and the spec's idea of threaded events match |
911 | for (int ei = JVMTI_MIN_EVENT_TYPE_VAL; ei <= JVMTI_MAX_EVENT_TYPE_VAL; ++ei) { |
912 | jlong bit = JvmtiEventEnabled::bit_for((jvmtiEvent)ei); |
913 | assert(((THREAD_FILTERED_EVENT_BITS & bit) != 0) == JvmtiUtil::event_threaded(ei), |
914 | "thread filtered event list does not match" ); |
915 | } |
916 | #endif |
917 | |
918 | _initialized = true; |
919 | } |
920 | |
921 | void |
922 | JvmtiEventControllerPrivate::vm_start() { |
923 | // some events are now able to be enabled (phase has changed) |
924 | JvmtiEventControllerPrivate::recompute_enabled(); |
925 | } |
926 | |
927 | |
928 | void |
929 | JvmtiEventControllerPrivate::vm_init() { |
930 | event_init(); |
931 | |
932 | // all the events are now able to be enabled (phase has changed) |
933 | JvmtiEventControllerPrivate::recompute_enabled(); |
934 | } |
935 | |
936 | |
937 | void |
938 | JvmtiEventControllerPrivate::vm_death() { |
939 | // events are disabled (phase has changed) |
940 | JvmtiEventControllerPrivate::recompute_enabled(); |
941 | } |
942 | |
943 | |
944 | /////////////////////////////////////////////////////////////// |
945 | // |
946 | // JvmtiEventController |
947 | // |
948 | |
949 | JvmtiEventEnabled JvmtiEventController::_universal_global_event_enabled; |
950 | |
951 | bool |
952 | JvmtiEventController::is_global_event(jvmtiEvent event_type) { |
953 | assert(is_valid_event_type(event_type), "invalid event type" ); |
954 | jlong bit_for = ((jlong)1) << (event_type - TOTAL_MIN_EVENT_TYPE_VAL); |
955 | return((bit_for & GLOBAL_EVENT_BITS)!=0); |
956 | } |
957 | |
958 | void |
959 | JvmtiEventController::set_user_enabled(JvmtiEnvBase *env, JavaThread *thread, jvmtiEvent event_type, bool enabled) { |
960 | if (Threads::number_of_threads() == 0) { |
961 | // during early VM start-up locks don't exist, but we are safely single threaded, |
962 | // call the functionality without holding the JvmtiThreadState_lock. |
963 | JvmtiEventControllerPrivate::set_user_enabled(env, thread, event_type, enabled); |
964 | } else { |
965 | MutexLocker mu(JvmtiThreadState_lock); |
966 | JvmtiEventControllerPrivate::set_user_enabled(env, thread, event_type, enabled); |
967 | } |
968 | } |
969 | |
970 | |
971 | void |
972 | JvmtiEventController::set_event_callbacks(JvmtiEnvBase *env, |
973 | const jvmtiEventCallbacks* callbacks, |
974 | jint size_of_callbacks) { |
975 | if (Threads::number_of_threads() == 0) { |
976 | // during early VM start-up locks don't exist, but we are safely single threaded, |
977 | // call the functionality without holding the JvmtiThreadState_lock. |
978 | JvmtiEventControllerPrivate::set_event_callbacks(env, callbacks, size_of_callbacks); |
979 | } else { |
980 | MutexLocker mu(JvmtiThreadState_lock); |
981 | JvmtiEventControllerPrivate::set_event_callbacks(env, callbacks, size_of_callbacks); |
982 | } |
983 | } |
984 | |
985 | void |
986 | JvmtiEventController::set_extension_event_callback(JvmtiEnvBase *env, |
987 | jint extension_event_index, |
988 | jvmtiExtensionEvent callback) { |
989 | if (Threads::number_of_threads() == 0) { |
990 | JvmtiEventControllerPrivate::set_extension_event_callback(env, extension_event_index, callback); |
991 | } else { |
992 | MutexLocker mu(JvmtiThreadState_lock); |
993 | JvmtiEventControllerPrivate::set_extension_event_callback(env, extension_event_index, callback); |
994 | } |
995 | } |
996 | |
997 | |
998 | |
999 | |
1000 | void |
1001 | JvmtiEventController::set_frame_pop(JvmtiEnvThreadState *ets, JvmtiFramePop fpop) { |
1002 | MutexLocker mu(SafepointSynchronize::is_at_safepoint() ? NULL : JvmtiThreadState_lock); |
1003 | JvmtiEventControllerPrivate::set_frame_pop(ets, fpop); |
1004 | } |
1005 | |
1006 | |
1007 | void |
1008 | JvmtiEventController::clear_frame_pop(JvmtiEnvThreadState *ets, JvmtiFramePop fpop) { |
1009 | MutexLocker mu(SafepointSynchronize::is_at_safepoint() ? NULL : JvmtiThreadState_lock); |
1010 | JvmtiEventControllerPrivate::clear_frame_pop(ets, fpop); |
1011 | } |
1012 | |
1013 | |
1014 | void |
1015 | JvmtiEventController::clear_to_frame_pop(JvmtiEnvThreadState *ets, JvmtiFramePop fpop) { |
1016 | MutexLocker mu(SafepointSynchronize::is_at_safepoint() ? NULL : JvmtiThreadState_lock); |
1017 | JvmtiEventControllerPrivate::clear_to_frame_pop(ets, fpop); |
1018 | } |
1019 | |
1020 | void |
1021 | JvmtiEventController::change_field_watch(jvmtiEvent event_type, bool added) { |
1022 | MutexLocker mu(JvmtiThreadState_lock); |
1023 | JvmtiEventControllerPrivate::change_field_watch(event_type, added); |
1024 | } |
1025 | |
1026 | void |
1027 | JvmtiEventController::thread_started(JavaThread *thread) { |
1028 | // operates only on the current thread |
1029 | // JvmtiThreadState_lock grabbed only if needed. |
1030 | JvmtiEventControllerPrivate::thread_started(thread); |
1031 | } |
1032 | |
1033 | void |
1034 | JvmtiEventController::thread_ended(JavaThread *thread) { |
1035 | // operates only on the current thread |
1036 | // JvmtiThreadState_lock grabbed only if needed. |
1037 | JvmtiEventControllerPrivate::thread_ended(thread); |
1038 | } |
1039 | |
1040 | void |
1041 | JvmtiEventController::env_initialize(JvmtiEnvBase *env) { |
1042 | if (Threads::number_of_threads() == 0) { |
1043 | // during early VM start-up locks don't exist, but we are safely single threaded, |
1044 | // call the functionality without holding the JvmtiThreadState_lock. |
1045 | JvmtiEventControllerPrivate::env_initialize(env); |
1046 | } else { |
1047 | MutexLocker mu(JvmtiThreadState_lock); |
1048 | JvmtiEventControllerPrivate::env_initialize(env); |
1049 | } |
1050 | } |
1051 | |
1052 | void |
1053 | JvmtiEventController::env_dispose(JvmtiEnvBase *env) { |
1054 | if (Threads::number_of_threads() == 0) { |
1055 | // during early VM start-up locks don't exist, but we are safely single threaded, |
1056 | // call the functionality without holding the JvmtiThreadState_lock. |
1057 | JvmtiEventControllerPrivate::env_dispose(env); |
1058 | } else { |
1059 | MutexLocker mu(JvmtiThreadState_lock); |
1060 | JvmtiEventControllerPrivate::env_dispose(env); |
1061 | } |
1062 | } |
1063 | |
1064 | |
1065 | void |
1066 | JvmtiEventController::vm_start() { |
1067 | if (JvmtiEnvBase::environments_might_exist()) { |
1068 | MutexLocker mu(JvmtiThreadState_lock); |
1069 | JvmtiEventControllerPrivate::vm_start(); |
1070 | } |
1071 | } |
1072 | |
1073 | void |
1074 | JvmtiEventController::vm_init() { |
1075 | if (JvmtiEnvBase::environments_might_exist()) { |
1076 | MutexLocker mu(JvmtiThreadState_lock); |
1077 | JvmtiEventControllerPrivate::vm_init(); |
1078 | } |
1079 | } |
1080 | |
1081 | void |
1082 | JvmtiEventController::vm_death() { |
1083 | if (JvmtiEnvBase::environments_might_exist()) { |
1084 | MutexLocker mu(JvmtiThreadState_lock); |
1085 | JvmtiEventControllerPrivate::vm_death(); |
1086 | } |
1087 | } |
1088 | |