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