| /* |
| * Copyright (c) 2003, 2016, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #include "precompiled.hpp" |
| #include "interpreter/interpreter.hpp" |
| #include "jvmtifiles/jvmtiEnv.hpp" |
| #include "logging/log.hpp" |
| #include "memory/resourceArea.hpp" |
| #include "prims/jvmtiEventController.hpp" |
| #include "prims/jvmtiEventController.inline.hpp" |
| #include "prims/jvmtiExport.hpp" |
| #include "prims/jvmtiImpl.hpp" |
| #include "prims/jvmtiThreadState.inline.hpp" |
| #include "runtime/frame.hpp" |
| #include "runtime/thread.hpp" |
| #include "runtime/vframe.hpp" |
| #include "runtime/vframe_hp.hpp" |
| #include "runtime/vmThread.hpp" |
| #include "runtime/vm_operations.hpp" |
| |
| #ifdef JVMTI_TRACE |
| #define EC_TRACE(out) do { \ |
| if (JvmtiTrace::trace_event_controller()) { \ |
| SafeResourceMark rm; \ |
| log_trace(jvmti) out; \ |
| } \ |
| } while (0) |
| #else |
| #define EC_TRACE(out) |
| #endif /*JVMTI_TRACE */ |
| |
| // bits for standard events |
| |
| static const jlong SINGLE_STEP_BIT = (((jlong)1) << (JVMTI_EVENT_SINGLE_STEP - TOTAL_MIN_EVENT_TYPE_VAL)); |
| static const jlong FRAME_POP_BIT = (((jlong)1) << (JVMTI_EVENT_FRAME_POP - TOTAL_MIN_EVENT_TYPE_VAL)); |
| static const jlong BREAKPOINT_BIT = (((jlong)1) << (JVMTI_EVENT_BREAKPOINT - TOTAL_MIN_EVENT_TYPE_VAL)); |
| static const jlong FIELD_ACCESS_BIT = (((jlong)1) << (JVMTI_EVENT_FIELD_ACCESS - TOTAL_MIN_EVENT_TYPE_VAL)); |
| static const jlong FIELD_MODIFICATION_BIT = (((jlong)1) << (JVMTI_EVENT_FIELD_MODIFICATION - TOTAL_MIN_EVENT_TYPE_VAL)); |
| static const jlong METHOD_ENTRY_BIT = (((jlong)1) << (JVMTI_EVENT_METHOD_ENTRY - TOTAL_MIN_EVENT_TYPE_VAL)); |
| static const jlong METHOD_EXIT_BIT = (((jlong)1) << (JVMTI_EVENT_METHOD_EXIT - TOTAL_MIN_EVENT_TYPE_VAL)); |
| static const jlong CLASS_FILE_LOAD_HOOK_BIT = (((jlong)1) << (JVMTI_EVENT_CLASS_FILE_LOAD_HOOK - TOTAL_MIN_EVENT_TYPE_VAL)); |
| static const jlong NATIVE_METHOD_BIND_BIT = (((jlong)1) << (JVMTI_EVENT_NATIVE_METHOD_BIND - TOTAL_MIN_EVENT_TYPE_VAL)); |
| static const jlong VM_START_BIT = (((jlong)1) << (JVMTI_EVENT_VM_START - TOTAL_MIN_EVENT_TYPE_VAL)); |
| static const jlong VM_INIT_BIT = (((jlong)1) << (JVMTI_EVENT_VM_INIT - TOTAL_MIN_EVENT_TYPE_VAL)); |
| static const jlong VM_DEATH_BIT = (((jlong)1) << (JVMTI_EVENT_VM_DEATH - TOTAL_MIN_EVENT_TYPE_VAL)); |
| static const jlong CLASS_LOAD_BIT = (((jlong)1) << (JVMTI_EVENT_CLASS_LOAD - TOTAL_MIN_EVENT_TYPE_VAL)); |
| static const jlong CLASS_PREPARE_BIT = (((jlong)1) << (JVMTI_EVENT_CLASS_PREPARE - TOTAL_MIN_EVENT_TYPE_VAL)); |
| static const jlong THREAD_START_BIT = (((jlong)1) << (JVMTI_EVENT_THREAD_START - TOTAL_MIN_EVENT_TYPE_VAL)); |
| static const jlong THREAD_END_BIT = (((jlong)1) << (JVMTI_EVENT_THREAD_END - TOTAL_MIN_EVENT_TYPE_VAL)); |
| static const jlong EXCEPTION_THROW_BIT = (((jlong)1) << (JVMTI_EVENT_EXCEPTION - TOTAL_MIN_EVENT_TYPE_VAL)); |
| static const jlong EXCEPTION_CATCH_BIT = (((jlong)1) << (JVMTI_EVENT_EXCEPTION_CATCH - TOTAL_MIN_EVENT_TYPE_VAL)); |
| static const jlong MONITOR_CONTENDED_ENTER_BIT = (((jlong)1) << (JVMTI_EVENT_MONITOR_CONTENDED_ENTER - TOTAL_MIN_EVENT_TYPE_VAL)); |
| static const jlong MONITOR_CONTENDED_ENTERED_BIT = (((jlong)1) << (JVMTI_EVENT_MONITOR_CONTENDED_ENTERED - TOTAL_MIN_EVENT_TYPE_VAL)); |
| static const jlong MONITOR_WAIT_BIT = (((jlong)1) << (JVMTI_EVENT_MONITOR_WAIT - TOTAL_MIN_EVENT_TYPE_VAL)); |
| static const jlong MONITOR_WAITED_BIT = (((jlong)1) << (JVMTI_EVENT_MONITOR_WAITED - TOTAL_MIN_EVENT_TYPE_VAL)); |
| static const jlong DYNAMIC_CODE_GENERATED_BIT = (((jlong)1) << (JVMTI_EVENT_DYNAMIC_CODE_GENERATED - TOTAL_MIN_EVENT_TYPE_VAL)); |
| static const jlong DATA_DUMP_BIT = (((jlong)1) << (JVMTI_EVENT_DATA_DUMP_REQUEST - TOTAL_MIN_EVENT_TYPE_VAL)); |
| static const jlong COMPILED_METHOD_LOAD_BIT = (((jlong)1) << (JVMTI_EVENT_COMPILED_METHOD_LOAD - TOTAL_MIN_EVENT_TYPE_VAL)); |
| static const jlong COMPILED_METHOD_UNLOAD_BIT = (((jlong)1) << (JVMTI_EVENT_COMPILED_METHOD_UNLOAD - TOTAL_MIN_EVENT_TYPE_VAL)); |
| static const jlong GARBAGE_COLLECTION_START_BIT = (((jlong)1) << (JVMTI_EVENT_GARBAGE_COLLECTION_START - TOTAL_MIN_EVENT_TYPE_VAL)); |
| static const jlong GARBAGE_COLLECTION_FINISH_BIT = (((jlong)1) << (JVMTI_EVENT_GARBAGE_COLLECTION_FINISH - TOTAL_MIN_EVENT_TYPE_VAL)); |
| static const jlong OBJECT_FREE_BIT = (((jlong)1) << (JVMTI_EVENT_OBJECT_FREE - TOTAL_MIN_EVENT_TYPE_VAL)); |
| static const jlong RESOURCE_EXHAUSTED_BIT = (((jlong)1) << (JVMTI_EVENT_RESOURCE_EXHAUSTED - TOTAL_MIN_EVENT_TYPE_VAL)); |
| static const jlong VM_OBJECT_ALLOC_BIT = (((jlong)1) << (JVMTI_EVENT_VM_OBJECT_ALLOC - TOTAL_MIN_EVENT_TYPE_VAL)); |
| |
| // bits for extension events |
| static const jlong CLASS_UNLOAD_BIT = (((jlong)1) << (EXT_EVENT_CLASS_UNLOAD - TOTAL_MIN_EVENT_TYPE_VAL)); |
| |
| |
| static const jlong MONITOR_BITS = MONITOR_CONTENDED_ENTER_BIT | MONITOR_CONTENDED_ENTERED_BIT | |
| MONITOR_WAIT_BIT | MONITOR_WAITED_BIT; |
| static const jlong EXCEPTION_BITS = EXCEPTION_THROW_BIT | EXCEPTION_CATCH_BIT; |
| static const jlong INTERP_EVENT_BITS = SINGLE_STEP_BIT | METHOD_ENTRY_BIT | METHOD_EXIT_BIT | |
| FRAME_POP_BIT | FIELD_ACCESS_BIT | FIELD_MODIFICATION_BIT; |
| static const jlong THREAD_FILTERED_EVENT_BITS = INTERP_EVENT_BITS | EXCEPTION_BITS | MONITOR_BITS | |
| BREAKPOINT_BIT | CLASS_LOAD_BIT | CLASS_PREPARE_BIT | THREAD_END_BIT; |
| static const jlong NEED_THREAD_LIFE_EVENTS = THREAD_FILTERED_EVENT_BITS | THREAD_START_BIT; |
| static const jlong EARLY_EVENT_BITS = CLASS_FILE_LOAD_HOOK_BIT | CLASS_LOAD_BIT | CLASS_PREPARE_BIT | |
| VM_START_BIT | VM_INIT_BIT | VM_DEATH_BIT | NATIVE_METHOD_BIND_BIT | |
| THREAD_START_BIT | THREAD_END_BIT | |
| COMPILED_METHOD_LOAD_BIT | COMPILED_METHOD_UNLOAD_BIT | |
| DYNAMIC_CODE_GENERATED_BIT; |
| static const jlong GLOBAL_EVENT_BITS = ~THREAD_FILTERED_EVENT_BITS; |
| static const jlong SHOULD_POST_ON_EXCEPTIONS_BITS = EXCEPTION_BITS | METHOD_EXIT_BIT | FRAME_POP_BIT; |
| |
| /////////////////////////////////////////////////////////////// |
| // |
| // JvmtiEventEnabled |
| // |
| |
| JvmtiEventEnabled::JvmtiEventEnabled() { |
| clear(); |
| } |
| |
| |
| void JvmtiEventEnabled::clear() { |
| _enabled_bits = 0; |
| #ifndef PRODUCT |
| _init_guard = JEE_INIT_GUARD; |
| #endif |
| } |
| |
| void JvmtiEventEnabled::set_enabled(jvmtiEvent event_type, bool enabled) { |
| jlong bits = get_bits(); |
| jlong mask = bit_for(event_type); |
| if (enabled) { |
| bits |= mask; |
| } else { |
| bits &= ~mask; |
| } |
| set_bits(bits); |
| } |
| |
| |
| /////////////////////////////////////////////////////////////// |
| // |
| // JvmtiEnvThreadEventEnable |
| // |
| |
| JvmtiEnvThreadEventEnable::JvmtiEnvThreadEventEnable() { |
| _event_user_enabled.clear(); |
| _event_enabled.clear(); |
| } |
| |
| |
| JvmtiEnvThreadEventEnable::~JvmtiEnvThreadEventEnable() { |
| _event_user_enabled.clear(); |
| _event_enabled.clear(); |
| } |
| |
| |
| /////////////////////////////////////////////////////////////// |
| // |
| // JvmtiThreadEventEnable |
| // |
| |
| JvmtiThreadEventEnable::JvmtiThreadEventEnable() { |
| _event_enabled.clear(); |
| } |
| |
| |
| JvmtiThreadEventEnable::~JvmtiThreadEventEnable() { |
| _event_enabled.clear(); |
| } |
| |
| |
| /////////////////////////////////////////////////////////////// |
| // |
| // JvmtiEnvEventEnable |
| // |
| |
| JvmtiEnvEventEnable::JvmtiEnvEventEnable() { |
| _event_user_enabled.clear(); |
| _event_callback_enabled.clear(); |
| _event_enabled.clear(); |
| } |
| |
| |
| JvmtiEnvEventEnable::~JvmtiEnvEventEnable() { |
| _event_user_enabled.clear(); |
| _event_callback_enabled.clear(); |
| _event_enabled.clear(); |
| } |
| |
| |
| /////////////////////////////////////////////////////////////// |
| // |
| // VM_EnterInterpOnlyMode |
| // |
| |
| class VM_EnterInterpOnlyMode : public VM_Operation { |
| private: |
| JvmtiThreadState *_state; |
| |
| public: |
| VM_EnterInterpOnlyMode(JvmtiThreadState *state); |
| |
| bool allow_nested_vm_operations() const { return true; } |
| VMOp_Type type() const { return VMOp_EnterInterpOnlyMode; } |
| void doit(); |
| |
| // to do: this same function is in jvmtiImpl - should be in one place |
| bool can_be_deoptimized(vframe* vf) { |
| return (vf->is_compiled_frame() && vf->fr().can_be_deoptimized()); |
| } |
| }; |
| |
| VM_EnterInterpOnlyMode::VM_EnterInterpOnlyMode(JvmtiThreadState *state) |
| : _state(state) |
| { |
| } |
| |
| |
| void VM_EnterInterpOnlyMode::doit() { |
| // Set up the current stack depth for later tracking |
| _state->invalidate_cur_stack_depth(); |
| |
| _state->enter_interp_only_mode(); |
| |
| JavaThread *thread = _state->get_thread(); |
| if (thread->has_last_Java_frame()) { |
| // If running in fullspeed mode, single stepping is implemented |
| // as follows: first, the interpreter does not dispatch to |
| // compiled code for threads that have single stepping enabled; |
| // second, we deoptimize all methods on the thread's stack when |
| // interpreted-only mode is enabled the first time for a given |
| // thread (nothing to do if no Java frames yet). |
| int num_marked = 0; |
| ResourceMark resMark; |
| RegisterMap rm(thread, false); |
| for (vframe* vf = thread->last_java_vframe(&rm); vf; vf = vf->sender()) { |
| if (can_be_deoptimized(vf)) { |
| ((compiledVFrame*) vf)->code()->mark_for_deoptimization(); |
| ++num_marked; |
| } |
| } |
| if (num_marked > 0) { |
| VM_Deoptimize op; |
| VMThread::execute(&op); |
| } |
| } |
| } |
| |
| |
| /////////////////////////////////////////////////////////////// |
| // |
| // VM_ChangeSingleStep |
| // |
| |
| class VM_ChangeSingleStep : public VM_Operation { |
| private: |
| bool _on; |
| |
| public: |
| VM_ChangeSingleStep(bool on); |
| VMOp_Type type() const { return VMOp_ChangeSingleStep; } |
| bool allow_nested_vm_operations() const { return true; } |
| void doit(); // method definition is after definition of JvmtiEventControllerPrivate because of scoping |
| }; |
| |
| |
| VM_ChangeSingleStep::VM_ChangeSingleStep(bool on) |
| : _on(on != 0) |
| { |
| } |
| |
| |
| |
| |
| /////////////////////////////////////////////////////////////// |
| // |
| // JvmtiEventControllerPrivate |
| // |
| // Private internal implementation methods for JvmtiEventController. |
| // |
| // These methods are thread safe either because they are called |
| // in early VM initialization which is single threaded, or they |
| // hold the JvmtiThreadState_lock. |
| // |
| |
| class JvmtiEventControllerPrivate : public AllStatic { |
| static bool _initialized; |
| public: |
| static void set_should_post_single_step(bool on); |
| static void enter_interp_only_mode(JvmtiThreadState *state); |
| static void leave_interp_only_mode(JvmtiThreadState *state); |
| static void recompute_enabled(); |
| static jlong recompute_env_enabled(JvmtiEnvBase* env); |
| static jlong recompute_env_thread_enabled(JvmtiEnvThreadState* ets, JvmtiThreadState* state); |
| static jlong recompute_thread_enabled(JvmtiThreadState *state); |
| static void event_init(); |
| |
| static void set_user_enabled(JvmtiEnvBase *env, JavaThread *thread, |
| jvmtiEvent event_type, bool enabled); |
| static void set_event_callbacks(JvmtiEnvBase *env, |
| const jvmtiEventCallbacks* callbacks, |
| jint size_of_callbacks); |
| |
| static void set_extension_event_callback(JvmtiEnvBase *env, |
| jint extension_event_index, |
| jvmtiExtensionEvent callback); |
| |
| static void set_frame_pop(JvmtiEnvThreadState *env_thread, JvmtiFramePop fpop); |
| static void clear_frame_pop(JvmtiEnvThreadState *env_thread, JvmtiFramePop fpop); |
| static void clear_to_frame_pop(JvmtiEnvThreadState *env_thread, JvmtiFramePop fpop); |
| static void change_field_watch(jvmtiEvent event_type, bool added); |
| |
| static void thread_started(JavaThread *thread); |
| static void thread_ended(JavaThread *thread); |
| |
| static void env_initialize(JvmtiEnvBase *env); |
| static void env_dispose(JvmtiEnvBase *env); |
| |
| static void vm_start(); |
| static void vm_init(); |
| static void vm_death(); |
| |
| static void trace_changed(JvmtiThreadState *state, jlong now_enabled, jlong changed); |
| static void trace_changed(jlong now_enabled, jlong changed); |
| }; |
| |
| bool JvmtiEventControllerPrivate::_initialized = false; |
| |
| void JvmtiEventControllerPrivate::set_should_post_single_step(bool on) { |
| // we have permission to do this, VM op doesn't |
| JvmtiExport::set_should_post_single_step(on); |
| } |
| |
| |
| // This change must always be occur when at a safepoint. |
| // Being at a safepoint causes the interpreter to use the |
| // safepoint dispatch table which we overload to find single |
| // step points. Just to be sure that it has been set, we |
| // call notice_safepoints when turning on single stepping. |
| // When we leave our current safepoint, should_post_single_step |
| // will be checked by the interpreter, and the table kept |
| // or changed accordingly. |
| void VM_ChangeSingleStep::doit() { |
| JvmtiEventControllerPrivate::set_should_post_single_step(_on); |
| if (_on) { |
| Interpreter::notice_safepoints(); |
| } |
| } |
| |
| |
| void JvmtiEventControllerPrivate::enter_interp_only_mode(JvmtiThreadState *state) { |
| EC_TRACE(("[%s] # Entering interpreter only mode", |
| JvmtiTrace::safe_get_thread_name(state->get_thread()))); |
| |
| VM_EnterInterpOnlyMode op(state); |
| VMThread::execute(&op); |
| } |
| |
| |
| void |
| JvmtiEventControllerPrivate::leave_interp_only_mode(JvmtiThreadState *state) { |
| EC_TRACE(("[%s] # Leaving interpreter only mode", |
| JvmtiTrace::safe_get_thread_name(state->get_thread()))); |
| state->leave_interp_only_mode(); |
| } |
| |
| |
| void |
| JvmtiEventControllerPrivate::trace_changed(JvmtiThreadState *state, jlong now_enabled, jlong changed) { |
| #ifdef JVMTI_TRACE |
| if (JvmtiTrace::trace_event_controller()) { |
| SafeResourceMark rm; |
| // traces standard events only |
| for (int ei = JVMTI_MIN_EVENT_TYPE_VAL; ei <= JVMTI_MAX_EVENT_TYPE_VAL; ++ei) { |
| jlong bit = JvmtiEventEnabled::bit_for((jvmtiEvent)ei); |
| if (changed & bit) { |
| // it changed, print it |
| log_trace(jvmti)("[%s] # %s event %s", |
| JvmtiTrace::safe_get_thread_name(state->get_thread()), |
| (now_enabled & bit)? "Enabling" : "Disabling", JvmtiTrace::event_name((jvmtiEvent)ei)); |
| } |
| } |
| } |
| #endif /*JVMTI_TRACE */ |
| } |
| |
| |
| void |
| JvmtiEventControllerPrivate::trace_changed(jlong now_enabled, jlong changed) { |
| #ifdef JVMTI_TRACE |
| if (JvmtiTrace::trace_event_controller()) { |
| SafeResourceMark rm; |
| // traces standard events only |
| for (int ei = JVMTI_MIN_EVENT_TYPE_VAL; ei <= JVMTI_MAX_EVENT_TYPE_VAL; ++ei) { |
| jlong bit = JvmtiEventEnabled::bit_for((jvmtiEvent)ei); |
| if (changed & bit) { |
| // it changed, print it |
| log_trace(jvmti)("[-] # %s event %s", |
| (now_enabled & bit)? "Enabling" : "Disabling", JvmtiTrace::event_name((jvmtiEvent)ei)); |
| } |
| } |
| } |
| #endif /*JVMTI_TRACE */ |
| } |
| |
| |
| // For the specified env: compute the currently truly enabled events |
| // set external state accordingly. |
| // Return value and set value must include all events. |
| // But outside this class, only non-thread-filtered events can be queried.. |
| jlong |
| JvmtiEventControllerPrivate::recompute_env_enabled(JvmtiEnvBase* env) { |
| jlong was_enabled = env->env_event_enable()->_event_enabled.get_bits(); |
| jlong now_enabled = |
| env->env_event_enable()->_event_callback_enabled.get_bits() & |
| env->env_event_enable()->_event_user_enabled.get_bits(); |
| |
| switch (env->phase()) { |
| case JVMTI_PHASE_PRIMORDIAL: |
| case JVMTI_PHASE_ONLOAD: |
| // only these events allowed in primordial or onload phase |
| now_enabled &= (EARLY_EVENT_BITS & ~THREAD_FILTERED_EVENT_BITS); |
| break; |
| case JVMTI_PHASE_START: |
| // only these events allowed in start phase |
| now_enabled &= EARLY_EVENT_BITS; |
| break; |
| case JVMTI_PHASE_LIVE: |
| // all events allowed during live phase |
| break; |
| case JVMTI_PHASE_DEAD: |
| // no events allowed when dead |
| now_enabled = 0; |
| break; |
| default: |
| assert(false, "no other phases - sanity check"); |
| break; |
| } |
| |
| // will we really send these events to this env |
| env->env_event_enable()->_event_enabled.set_bits(now_enabled); |
| |
| trace_changed(now_enabled, (now_enabled ^ was_enabled) & ~THREAD_FILTERED_EVENT_BITS); |
| |
| return now_enabled; |
| } |
| |
| |
| // For the specified env and thread: compute the currently truly enabled events |
| // set external state accordingly. Only thread-filtered events are included. |
| jlong |
| JvmtiEventControllerPrivate::recompute_env_thread_enabled(JvmtiEnvThreadState* ets, JvmtiThreadState* state) { |
| JvmtiEnv *env = ets->get_env(); |
| |
| jlong was_enabled = ets->event_enable()->_event_enabled.get_bits(); |
| jlong now_enabled = THREAD_FILTERED_EVENT_BITS & |
| env->env_event_enable()->_event_callback_enabled.get_bits() & |
| (env->env_event_enable()->_event_user_enabled.get_bits() | |
| ets->event_enable()->_event_user_enabled.get_bits()); |
| |
| // for frame pops and field watchs, computed enabled state |
| // is only true if an event has been requested |
| if (!ets->has_frame_pops()) { |
| now_enabled &= ~FRAME_POP_BIT; |
| } |
| if (*((int *)JvmtiExport::get_field_access_count_addr()) == 0) { |
| now_enabled &= ~FIELD_ACCESS_BIT; |
| } |
| if (*((int *)JvmtiExport::get_field_modification_count_addr()) == 0) { |
| now_enabled &= ~FIELD_MODIFICATION_BIT; |
| } |
| |
| switch (JvmtiEnv::get_phase()) { |
| case JVMTI_PHASE_DEAD: |
| // no events allowed when dead |
| now_enabled = 0; |
| break; |
| } |
| |
| // if anything changed do update |
| if (now_enabled != was_enabled) { |
| |
| // will we really send these events to this thread x env |
| ets->event_enable()->_event_enabled.set_bits(now_enabled); |
| |
| // If the enabled status of the single step or breakpoint events changed, |
| // the location status may need to change as well. |
| jlong changed = now_enabled ^ was_enabled; |
| if (changed & SINGLE_STEP_BIT) { |
| ets->reset_current_location(JVMTI_EVENT_SINGLE_STEP, (now_enabled & SINGLE_STEP_BIT) != 0); |
| } |
| if (changed & BREAKPOINT_BIT) { |
| ets->reset_current_location(JVMTI_EVENT_BREAKPOINT, (now_enabled & BREAKPOINT_BIT) != 0); |
| } |
| trace_changed(state, now_enabled, changed); |
| } |
| return now_enabled; |
| } |
| |
| |
| // For the specified thread: compute the currently truly enabled events |
| // set external state accordingly. Only thread-filtered events are included. |
| jlong |
| JvmtiEventControllerPrivate::recompute_thread_enabled(JvmtiThreadState *state) { |
| if (state == NULL) { |
| // associated JavaThread is exiting |
| return (jlong)0; |
| } |
| |
| jlong was_any_env_enabled = state->thread_event_enable()->_event_enabled.get_bits(); |
| jlong any_env_enabled = 0; |
| |
| { |
| // This iteration will include JvmtiEnvThreadStates whoses environments |
| // have been disposed. These JvmtiEnvThreadStates must not be filtered |
| // as recompute must be called on them to disable their events, |
| JvmtiEnvThreadStateIterator it(state); |
| for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { |
| any_env_enabled |= recompute_env_thread_enabled(ets, state); |
| } |
| } |
| |
| if (any_env_enabled != was_any_env_enabled) { |
| // mark if event is truly enabled on this thread in any environment |
| state->thread_event_enable()->_event_enabled.set_bits(any_env_enabled); |
| |
| // compute interp_only mode |
| bool should_be_interp = (any_env_enabled & INTERP_EVENT_BITS) != 0; |
| bool is_now_interp = state->is_interp_only_mode(); |
| |
| if (should_be_interp != is_now_interp) { |
| if (should_be_interp) { |
| enter_interp_only_mode(state); |
| } else { |
| leave_interp_only_mode(state); |
| } |
| } |
| |
| // update the JavaThread cached value for thread-specific should_post_on_exceptions value |
| bool should_post_on_exceptions = (any_env_enabled & SHOULD_POST_ON_EXCEPTIONS_BITS) != 0; |
| state->set_should_post_on_exceptions(should_post_on_exceptions); |
| } |
| |
| return any_env_enabled; |
| } |
| |
| |
| // Compute truly enabled events - meaning if the event can and could be |
| // sent. An event is truly enabled if it is user enabled on the thread |
| // or globally user enabled, but only if there is a callback or event hook |
| // for it and, for field watch and frame pop, one has been set. |
| // Compute if truly enabled, per thread, per environment, per combination |
| // (thread x environment), and overall. These merges are true if any is true. |
| // True per thread if some environment has callback set and the event is globally |
| // enabled or enabled for this thread. |
| // True per environment if the callback is set and the event is globally |
| // enabled in this environment or enabled for any thread in this environment. |
| // True per combination if the environment has the callback set and the |
| // event is globally enabled in this environment or the event is enabled |
| // for this thread and environment. |
| // |
| // All states transitions dependent on these transitions are also handled here. |
| void |
| JvmtiEventControllerPrivate::recompute_enabled() { |
| assert(Threads::number_of_threads() == 0 || JvmtiThreadState_lock->is_locked(), "sanity check"); |
| |
| // event enabled for any thread in any environment |
| jlong was_any_env_thread_enabled = JvmtiEventController::_universal_global_event_enabled.get_bits(); |
| jlong any_env_thread_enabled = 0; |
| |
| EC_TRACE(("[-] # recompute enabled - before " UINT64_FORMAT_X, was_any_env_thread_enabled)); |
| |
| // compute non-thread-filters events. |
| // This must be done separately from thread-filtered events, since some |
| // events can occur before any threads exist. |
| JvmtiEnvIterator it; |
| for (JvmtiEnvBase* env = it.first(); env != NULL; env = it.next(env)) { |
| any_env_thread_enabled |= recompute_env_enabled(env); |
| } |
| |
| // We need to create any missing jvmti_thread_state if there are globally set thread |
| // filtered events and there weren't last time |
| if ( (any_env_thread_enabled & THREAD_FILTERED_EVENT_BITS) != 0 && |
| (was_any_env_thread_enabled & THREAD_FILTERED_EVENT_BITS) == 0) { |
| { |
| MutexLocker mu(Threads_lock); //hold the Threads_lock for the iteration |
| for (JavaThread *tp = Threads::first(); tp != NULL; tp = tp->next()) { |
| // state_for_while_locked() makes tp->is_exiting() check |
| JvmtiThreadState::state_for_while_locked(tp); // create the thread state if missing |
| } |
| }// release Threads_lock |
| } |
| |
| // compute and set thread-filtered events |
| for (JvmtiThreadState *state = JvmtiThreadState::first(); state != NULL; state = state->next()) { |
| any_env_thread_enabled |= recompute_thread_enabled(state); |
| } |
| |
| // set universal state (across all envs and threads) |
| jlong delta = any_env_thread_enabled ^ was_any_env_thread_enabled; |
| if (delta != 0) { |
| JvmtiExport::set_should_post_field_access((any_env_thread_enabled & FIELD_ACCESS_BIT) != 0); |
| JvmtiExport::set_should_post_field_modification((any_env_thread_enabled & FIELD_MODIFICATION_BIT) != 0); |
| JvmtiExport::set_should_post_class_load((any_env_thread_enabled & CLASS_LOAD_BIT) != 0); |
| JvmtiExport::set_should_post_class_file_load_hook((any_env_thread_enabled & CLASS_FILE_LOAD_HOOK_BIT) != 0); |
| JvmtiExport::set_should_post_native_method_bind((any_env_thread_enabled & NATIVE_METHOD_BIND_BIT) != 0); |
| JvmtiExport::set_should_post_dynamic_code_generated((any_env_thread_enabled & DYNAMIC_CODE_GENERATED_BIT) != 0); |
| JvmtiExport::set_should_post_data_dump((any_env_thread_enabled & DATA_DUMP_BIT) != 0); |
| JvmtiExport::set_should_post_class_prepare((any_env_thread_enabled & CLASS_PREPARE_BIT) != 0); |
| JvmtiExport::set_should_post_class_unload((any_env_thread_enabled & CLASS_UNLOAD_BIT) != 0); |
| JvmtiExport::set_should_post_monitor_contended_enter((any_env_thread_enabled & MONITOR_CONTENDED_ENTER_BIT) != 0); |
| JvmtiExport::set_should_post_monitor_contended_entered((any_env_thread_enabled & MONITOR_CONTENDED_ENTERED_BIT) != 0); |
| JvmtiExport::set_should_post_monitor_wait((any_env_thread_enabled & MONITOR_WAIT_BIT) != 0); |
| JvmtiExport::set_should_post_monitor_waited((any_env_thread_enabled & MONITOR_WAITED_BIT) != 0); |
| JvmtiExport::set_should_post_garbage_collection_start((any_env_thread_enabled & GARBAGE_COLLECTION_START_BIT) != 0); |
| JvmtiExport::set_should_post_garbage_collection_finish((any_env_thread_enabled & GARBAGE_COLLECTION_FINISH_BIT) != 0); |
| JvmtiExport::set_should_post_object_free((any_env_thread_enabled & OBJECT_FREE_BIT) != 0); |
| JvmtiExport::set_should_post_resource_exhausted((any_env_thread_enabled & RESOURCE_EXHAUSTED_BIT) != 0); |
| JvmtiExport::set_should_post_compiled_method_load((any_env_thread_enabled & COMPILED_METHOD_LOAD_BIT) != 0); |
| JvmtiExport::set_should_post_compiled_method_unload((any_env_thread_enabled & COMPILED_METHOD_UNLOAD_BIT) != 0); |
| JvmtiExport::set_should_post_vm_object_alloc((any_env_thread_enabled & VM_OBJECT_ALLOC_BIT) != 0); |
| |
| // need this if we want thread events or we need them to init data |
| JvmtiExport::set_should_post_thread_life((any_env_thread_enabled & NEED_THREAD_LIFE_EVENTS) != 0); |
| |
| // If single stepping is turned on or off, execute the VM op to change it. |
| if (delta & SINGLE_STEP_BIT) { |
| switch (JvmtiEnv::get_phase()) { |
| case JVMTI_PHASE_DEAD: |
| // If the VM is dying we can't execute VM ops |
| break; |
| case JVMTI_PHASE_LIVE: { |
| VM_ChangeSingleStep op((any_env_thread_enabled & SINGLE_STEP_BIT) != 0); |
| VMThread::execute(&op); |
| break; |
| } |
| default: |
| assert(false, "should never come here before live phase"); |
| break; |
| } |
| } |
| |
| // set global truly enabled, that is, any thread in any environment |
| JvmtiEventController::_universal_global_event_enabled.set_bits(any_env_thread_enabled); |
| |
| // set global should_post_on_exceptions |
| JvmtiExport::set_should_post_on_exceptions((any_env_thread_enabled & SHOULD_POST_ON_EXCEPTIONS_BITS) != 0); |
| |
| } |
| |
| EC_TRACE(("[-] # recompute enabled - after " UINT64_FORMAT_X, any_env_thread_enabled)); |
| } |
| |
| |
| void |
| JvmtiEventControllerPrivate::thread_started(JavaThread *thread) { |
| assert(thread->is_Java_thread(), "Must be JavaThread"); |
| assert(thread == Thread::current(), "must be current thread"); |
| assert(JvmtiEnvBase::environments_might_exist(), "to enter event controller, JVM TI environments must exist"); |
| |
| EC_TRACE(("[%s] # thread started", JvmtiTrace::safe_get_thread_name(thread))); |
| |
| // if we have any thread filtered events globally enabled, create/update the thread state |
| if ((JvmtiEventController::_universal_global_event_enabled.get_bits() & THREAD_FILTERED_EVENT_BITS) != 0) { |
| MutexLocker mu(JvmtiThreadState_lock); |
| // create the thread state if missing |
| JvmtiThreadState *state = JvmtiThreadState::state_for_while_locked(thread); |
| if (state != NULL) { // skip threads with no JVMTI thread state |
| recompute_thread_enabled(state); |
| } |
| } |
| } |
| |
| |
| void |
| JvmtiEventControllerPrivate::thread_ended(JavaThread *thread) { |
| // Removes the JvmtiThreadState associated with the specified thread. |
| // May be called after all environments have been disposed. |
| assert(JvmtiThreadState_lock->is_locked(), "sanity check"); |
| |
| EC_TRACE(("[%s] # thread ended", JvmtiTrace::safe_get_thread_name(thread))); |
| |
| JvmtiThreadState *state = thread->jvmti_thread_state(); |
| assert(state != NULL, "else why are we here?"); |
| delete state; |
| } |
| |
| void JvmtiEventControllerPrivate::set_event_callbacks(JvmtiEnvBase *env, |
| const jvmtiEventCallbacks* callbacks, |
| jint size_of_callbacks) { |
| assert(Threads::number_of_threads() == 0 || JvmtiThreadState_lock->is_locked(), "sanity check"); |
| EC_TRACE(("[*] # set event callbacks")); |
| |
| env->set_event_callbacks(callbacks, size_of_callbacks); |
| jlong enabled_bits = 0; |
| for (int ei = JVMTI_MIN_EVENT_TYPE_VAL; ei <= JVMTI_MAX_EVENT_TYPE_VAL; ++ei) { |
| jvmtiEvent evt_t = (jvmtiEvent)ei; |
| if (env->has_callback(evt_t)) { |
| enabled_bits |= JvmtiEventEnabled::bit_for(evt_t); |
| } |
| } |
| env->env_event_enable()->_event_callback_enabled.set_bits(enabled_bits); |
| recompute_enabled(); |
| } |
| |
| void |
| JvmtiEventControllerPrivate::set_extension_event_callback(JvmtiEnvBase *env, |
| jint extension_event_index, |
| jvmtiExtensionEvent callback) |
| { |
| assert(Threads::number_of_threads() == 0 || JvmtiThreadState_lock->is_locked(), "sanity check"); |
| EC_TRACE(("[*] # set extension event callback")); |
| |
| // extension events are allocated below JVMTI_MIN_EVENT_TYPE_VAL |
| assert(extension_event_index >= (jint)EXT_MIN_EVENT_TYPE_VAL && |
| extension_event_index <= (jint)EXT_MAX_EVENT_TYPE_VAL, "sanity check"); |
| |
| |
| // As the bits for both standard (jvmtiEvent) and extension |
| // (jvmtiExtEvents) are stored in the same word we cast here to |
| // jvmtiEvent to set/clear the bit for this extension event. |
| jvmtiEvent event_type = (jvmtiEvent)extension_event_index; |
| |
| // Prevent a possible race condition where events are re-enabled by a call to |
| // set event callbacks, where the DisposeEnvironment occurs after the boiler-plate |
| // environment check and before the lock is acquired. |
| // We can safely do the is_valid check now, as JvmtiThreadState_lock is held. |
| bool enabling = (callback != NULL) && (env->is_valid()); |
| env->env_event_enable()->set_user_enabled(event_type, enabling); |
| |
| // update the callback |
| jvmtiExtEventCallbacks* ext_callbacks = env->ext_callbacks(); |
| switch (extension_event_index) { |
| case EXT_EVENT_CLASS_UNLOAD : |
| ext_callbacks->ClassUnload = callback; |
| break; |
| default: |
| ShouldNotReachHere(); |
| } |
| |
| // update the callback enable/disable bit |
| jlong enabled_bits = env->env_event_enable()->_event_callback_enabled.get_bits(); |
| jlong bit_for = JvmtiEventEnabled::bit_for(event_type); |
| if (enabling) { |
| enabled_bits |= bit_for; |
| } else { |
| enabled_bits &= ~bit_for; |
| } |
| env->env_event_enable()->_event_callback_enabled.set_bits(enabled_bits); |
| |
| recompute_enabled(); |
| } |
| |
| |
| void |
| JvmtiEventControllerPrivate::env_initialize(JvmtiEnvBase *env) { |
| assert(Threads::number_of_threads() == 0 || JvmtiThreadState_lock->is_locked(), "sanity check"); |
| EC_TRACE(("[*] # env initialize")); |
| |
| if (JvmtiEnvBase::is_vm_live()) { |
| // if we didn't initialize event info already (this is a late |
| // launched environment), do it now. |
| event_init(); |
| } |
| |
| env->initialize(); |
| |
| // add the JvmtiEnvThreadState to each JvmtiThreadState |
| for (JvmtiThreadState *state = JvmtiThreadState::first(); state != NULL; state = state->next()) { |
| state->add_env(env); |
| assert((JvmtiEnv*)(state->env_thread_state(env)->get_env()) == env, "sanity check"); |
| } |
| JvmtiEventControllerPrivate::recompute_enabled(); |
| } |
| |
| |
| void |
| JvmtiEventControllerPrivate::env_dispose(JvmtiEnvBase *env) { |
| assert(Threads::number_of_threads() == 0 || JvmtiThreadState_lock->is_locked(), "sanity check"); |
| EC_TRACE(("[*] # env dispose")); |
| |
| // Before the environment is marked disposed, disable all events on this |
| // environment (by zapping the callbacks). As a result, the disposed |
| // environment will not call event handlers. |
| set_event_callbacks(env, NULL, 0); |
| for (jint extension_event_index = EXT_MIN_EVENT_TYPE_VAL; |
| extension_event_index <= EXT_MAX_EVENT_TYPE_VAL; |
| ++extension_event_index) { |
| set_extension_event_callback(env, extension_event_index, NULL); |
| } |
| |
| // Let the environment finish disposing itself. |
| env->env_dispose(); |
| } |
| |
| |
| void |
| JvmtiEventControllerPrivate::set_user_enabled(JvmtiEnvBase *env, JavaThread *thread, |
| jvmtiEvent event_type, bool enabled) { |
| assert(Threads::number_of_threads() == 0 || JvmtiThreadState_lock->is_locked(), "sanity check"); |
| |
| EC_TRACE(("[%s] # user %s event %s", |
| thread==NULL? "ALL": JvmtiTrace::safe_get_thread_name(thread), |
| enabled? "enabled" : "disabled", JvmtiTrace::event_name(event_type))); |
| |
| if (thread == NULL) { |
| env->env_event_enable()->set_user_enabled(event_type, enabled); |
| } else { |
| // create the thread state (if it didn't exist before) |
| JvmtiThreadState *state = JvmtiThreadState::state_for_while_locked(thread); |
| if (state != NULL) { |
| state->env_thread_state(env)->event_enable()->set_user_enabled(event_type, enabled); |
| } |
| } |
| recompute_enabled(); |
| } |
| |
| |
| void |
| JvmtiEventControllerPrivate::set_frame_pop(JvmtiEnvThreadState *ets, JvmtiFramePop fpop) { |
| EC_TRACE(("[%s] # set frame pop - frame=%d", |
| JvmtiTrace::safe_get_thread_name(ets->get_thread()), |
| fpop.frame_number() )); |
| |
| ets->get_frame_pops()->set(fpop); |
| recompute_thread_enabled(ets->get_thread()->jvmti_thread_state()); |
| } |
| |
| |
| void |
| JvmtiEventControllerPrivate::clear_frame_pop(JvmtiEnvThreadState *ets, JvmtiFramePop fpop) { |
| EC_TRACE(("[%s] # clear frame pop - frame=%d", |
| JvmtiTrace::safe_get_thread_name(ets->get_thread()), |
| fpop.frame_number() )); |
| |
| ets->get_frame_pops()->clear(fpop); |
| recompute_thread_enabled(ets->get_thread()->jvmti_thread_state()); |
| } |
| |
| |
| void |
| JvmtiEventControllerPrivate::clear_to_frame_pop(JvmtiEnvThreadState *ets, JvmtiFramePop fpop) { |
| int cleared_cnt = ets->get_frame_pops()->clear_to(fpop); |
| |
| EC_TRACE(("[%s] # clear to frame pop - frame=%d, count=%d", |
| JvmtiTrace::safe_get_thread_name(ets->get_thread()), |
| fpop.frame_number(), |
| cleared_cnt )); |
| |
| if (cleared_cnt > 0) { |
| recompute_thread_enabled(ets->get_thread()->jvmti_thread_state()); |
| } |
| } |
| |
| void |
| JvmtiEventControllerPrivate::change_field_watch(jvmtiEvent event_type, bool added) { |
| int *count_addr; |
| |
| switch (event_type) { |
| case JVMTI_EVENT_FIELD_MODIFICATION: |
| count_addr = (int *)JvmtiExport::get_field_modification_count_addr(); |
| break; |
| case JVMTI_EVENT_FIELD_ACCESS: |
| count_addr = (int *)JvmtiExport::get_field_access_count_addr(); |
| break; |
| default: |
| assert(false, "incorrect event"); |
| return; |
| } |
| |
| EC_TRACE(("[-] # change field watch - %s %s count=%d", |
| event_type==JVMTI_EVENT_FIELD_MODIFICATION? "modification" : "access", |
| added? "add" : "remove", |
| *count_addr)); |
| |
| if (added) { |
| (*count_addr)++; |
| if (*count_addr == 1) { |
| recompute_enabled(); |
| } |
| } else { |
| if (*count_addr > 0) { |
| (*count_addr)--; |
| if (*count_addr == 0) { |
| recompute_enabled(); |
| } |
| } else { |
| assert(false, "field watch out of phase"); |
| } |
| } |
| } |
| |
| void |
| JvmtiEventControllerPrivate::event_init() { |
| assert(JvmtiThreadState_lock->is_locked(), "sanity check"); |
| |
| if (_initialized) { |
| return; |
| } |
| |
| EC_TRACE(("[-] # VM live")); |
| |
| #ifdef ASSERT |
| // check that our idea and the spec's idea of threaded events match |
| for (int ei = JVMTI_MIN_EVENT_TYPE_VAL; ei <= JVMTI_MAX_EVENT_TYPE_VAL; ++ei) { |
| jlong bit = JvmtiEventEnabled::bit_for((jvmtiEvent)ei); |
| assert(((THREAD_FILTERED_EVENT_BITS & bit) != 0) == JvmtiUtil::event_threaded(ei), |
| "thread filtered event list does not match"); |
| } |
| #endif |
| |
| _initialized = true; |
| } |
| |
| void |
| JvmtiEventControllerPrivate::vm_start() { |
| // some events are now able to be enabled (phase has changed) |
| JvmtiEventControllerPrivate::recompute_enabled(); |
| } |
| |
| |
| void |
| JvmtiEventControllerPrivate::vm_init() { |
| event_init(); |
| |
| // all the events are now able to be enabled (phase has changed) |
| JvmtiEventControllerPrivate::recompute_enabled(); |
| } |
| |
| |
| void |
| JvmtiEventControllerPrivate::vm_death() { |
| // events are disabled (phase has changed) |
| JvmtiEventControllerPrivate::recompute_enabled(); |
| } |
| |
| |
| /////////////////////////////////////////////////////////////// |
| // |
| // JvmtiEventController |
| // |
| |
| JvmtiEventEnabled JvmtiEventController::_universal_global_event_enabled; |
| |
| bool |
| JvmtiEventController::is_global_event(jvmtiEvent event_type) { |
| assert(is_valid_event_type(event_type), "invalid event type"); |
| jlong bit_for = ((jlong)1) << (event_type - TOTAL_MIN_EVENT_TYPE_VAL); |
| return((bit_for & GLOBAL_EVENT_BITS)!=0); |
| } |
| |
| void |
| JvmtiEventController::set_user_enabled(JvmtiEnvBase *env, JavaThread *thread, jvmtiEvent event_type, bool enabled) { |
| if (Threads::number_of_threads() == 0) { |
| // during early VM start-up locks don't exist, but we are safely single threaded, |
| // call the functionality without holding the JvmtiThreadState_lock. |
| JvmtiEventControllerPrivate::set_user_enabled(env, thread, event_type, enabled); |
| } else { |
| MutexLocker mu(JvmtiThreadState_lock); |
| JvmtiEventControllerPrivate::set_user_enabled(env, thread, event_type, enabled); |
| } |
| } |
| |
| |
| void |
| JvmtiEventController::set_event_callbacks(JvmtiEnvBase *env, |
| const jvmtiEventCallbacks* callbacks, |
| jint size_of_callbacks) { |
| if (Threads::number_of_threads() == 0) { |
| // during early VM start-up locks don't exist, but we are safely single threaded, |
| // call the functionality without holding the JvmtiThreadState_lock. |
| JvmtiEventControllerPrivate::set_event_callbacks(env, callbacks, size_of_callbacks); |
| } else { |
| MutexLocker mu(JvmtiThreadState_lock); |
| JvmtiEventControllerPrivate::set_event_callbacks(env, callbacks, size_of_callbacks); |
| } |
| } |
| |
| void |
| JvmtiEventController::set_extension_event_callback(JvmtiEnvBase *env, |
| jint extension_event_index, |
| jvmtiExtensionEvent callback) { |
| if (Threads::number_of_threads() == 0) { |
| JvmtiEventControllerPrivate::set_extension_event_callback(env, extension_event_index, callback); |
| } else { |
| MutexLocker mu(JvmtiThreadState_lock); |
| JvmtiEventControllerPrivate::set_extension_event_callback(env, extension_event_index, callback); |
| } |
| } |
| |
| |
| |
| |
| void |
| JvmtiEventController::set_frame_pop(JvmtiEnvThreadState *ets, JvmtiFramePop fpop) { |
| MutexLockerEx mu(SafepointSynchronize::is_at_safepoint() ? NULL : JvmtiThreadState_lock); |
| JvmtiEventControllerPrivate::set_frame_pop(ets, fpop); |
| } |
| |
| |
| void |
| JvmtiEventController::clear_frame_pop(JvmtiEnvThreadState *ets, JvmtiFramePop fpop) { |
| MutexLockerEx mu(SafepointSynchronize::is_at_safepoint() ? NULL : JvmtiThreadState_lock); |
| JvmtiEventControllerPrivate::clear_frame_pop(ets, fpop); |
| } |
| |
| |
| void |
| JvmtiEventController::clear_to_frame_pop(JvmtiEnvThreadState *ets, JvmtiFramePop fpop) { |
| MutexLockerEx mu(SafepointSynchronize::is_at_safepoint() ? NULL : JvmtiThreadState_lock); |
| JvmtiEventControllerPrivate::clear_to_frame_pop(ets, fpop); |
| } |
| |
| void |
| JvmtiEventController::change_field_watch(jvmtiEvent event_type, bool added) { |
| MutexLocker mu(JvmtiThreadState_lock); |
| JvmtiEventControllerPrivate::change_field_watch(event_type, added); |
| } |
| |
| void |
| JvmtiEventController::thread_started(JavaThread *thread) { |
| // operates only on the current thread |
| // JvmtiThreadState_lock grabbed only if needed. |
| JvmtiEventControllerPrivate::thread_started(thread); |
| } |
| |
| void |
| JvmtiEventController::thread_ended(JavaThread *thread) { |
| // operates only on the current thread |
| // JvmtiThreadState_lock grabbed only if needed. |
| JvmtiEventControllerPrivate::thread_ended(thread); |
| } |
| |
| void |
| JvmtiEventController::env_initialize(JvmtiEnvBase *env) { |
| if (Threads::number_of_threads() == 0) { |
| // during early VM start-up locks don't exist, but we are safely single threaded, |
| // call the functionality without holding the JvmtiThreadState_lock. |
| JvmtiEventControllerPrivate::env_initialize(env); |
| } else { |
| MutexLocker mu(JvmtiThreadState_lock); |
| JvmtiEventControllerPrivate::env_initialize(env); |
| } |
| } |
| |
| void |
| JvmtiEventController::env_dispose(JvmtiEnvBase *env) { |
| if (Threads::number_of_threads() == 0) { |
| // during early VM start-up locks don't exist, but we are safely single threaded, |
| // call the functionality without holding the JvmtiThreadState_lock. |
| JvmtiEventControllerPrivate::env_dispose(env); |
| } else { |
| MutexLocker mu(JvmtiThreadState_lock); |
| JvmtiEventControllerPrivate::env_dispose(env); |
| } |
| } |
| |
| |
| void |
| JvmtiEventController::vm_start() { |
| if (JvmtiEnvBase::environments_might_exist()) { |
| MutexLocker mu(JvmtiThreadState_lock); |
| JvmtiEventControllerPrivate::vm_start(); |
| } |
| } |
| |
| void |
| JvmtiEventController::vm_init() { |
| if (JvmtiEnvBase::environments_might_exist()) { |
| MutexLocker mu(JvmtiThreadState_lock); |
| JvmtiEventControllerPrivate::vm_init(); |
| } |
| } |
| |
| void |
| JvmtiEventController::vm_death() { |
| if (JvmtiEnvBase::environments_might_exist()) { |
| MutexLocker mu(JvmtiThreadState_lock); |
| JvmtiEventControllerPrivate::vm_death(); |
| } |
| } |