jdk8-mips64-public/hotspot: src/share/vm/prims/jvmtiEventController.cpp@f008d3631bd1 (annotated)

src/share/vm/prims/jvmtiEventController.cpp@f008d3631bd1 (annotated)

src/share/vm/prims/jvmtiEventController.cpp

Wed, 08 Oct 2008 08:10:51 -0700

author: ksrini
date: Wed, 08 Oct 2008 08:10:51 -0700
changeset 823: f008d3631bd1
parent 435: a61af66fc99e
child 1044: ea20d7ce26b0
permissions: -rw-r--r--

6755845: JVM_FindClassFromBoot triggers assertions
Summary: Fixes assertions caused by one jvm_entry calling another, solved by refactoring code and modified gamma test.
Reviewed-by: dholmes, xlu

 /*
  * Copyright 2003-2007 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  * CA 95054 USA or visit www.sun.com if you need additional information or
  * have any questions.
  *
  */
 # include "incls/_precompiled.incl"
 # include "incls/_jvmtiEventController.cpp.incl"
 #ifdef JVMTI_TRACE
 #define EC_TRACE(out) if (JvmtiTrace::trace_event_controller()) { SafeResourceMark rm; tty->print_cr 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 |
                                VM_START_BIT | VM_INIT_BIT | VM_DEATH_BIT | NATIVE_METHOD_BIND_BIT |
                                THREAD_START_BIT | THREAD_END_BIT |
                                DYNAMIC_CODE_GENERATED_BIT;
 static const jlong  GLOBAL_EVENT_BITS = ~THREAD_FILTERED_EVENT_BITS;
 ///////////////////////////////////////////////////////////////
 //
 // 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(("JVMTI [%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(("JVMTI [%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
         tty->print_cr("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
         tty->print_cr("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 (JvmtiEnv::get_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) {
   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);
       }
     }
   }
   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(("JVMTI [-] # recompute enabled - before %llx", 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) {
     assert(JvmtiEnv::is_vm_live() || (JvmtiEnv::get_phase()==JVMTI_PHASE_START),
       "thread filtered events should not be enabled when VM not in start or live phase");
     {
       MutexLocker mu(Threads_lock);   //hold the Threads_lock for the iteration
       for (JavaThread *tp = Threads::first(); tp != NULL; tp = tp->next()) {
         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);
   }
   EC_TRACE(("JVMTI [-] # recompute enabled - after %llx", 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(("JVMTI [%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.
   EC_TRACE(("JVMTI [%s] # thread ended", JvmtiTrace::safe_get_thread_name(thread)));
   JvmtiThreadState *state = thread->jvmti_thread_state();
   if (state != NULL) {
     MutexLocker mu(JvmtiThreadState_lock);
     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(("JVMTI [*] # 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(("JVMTI [*] # 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(("JVMTI [*] # 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(("JVMTI [*] # 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(("JVMTI [%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(("JVMTI [%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(("JVMTI [%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(("JVMTI [%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(("JVMTI [-] # 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(("JVMTI [-] # 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) {
   MutexLocker mu(JvmtiThreadState_lock);
   JvmtiEventControllerPrivate::set_frame_pop(ets, fpop);
 }
 void
 JvmtiEventController::clear_frame_pop(JvmtiEnvThreadState *ets, JvmtiFramePop fpop) {
   MutexLocker mu(JvmtiThreadState_lock);
   JvmtiEventControllerPrivate::clear_frame_pop(ets, fpop);
 }
 void
 JvmtiEventController::clear_to_frame_pop(JvmtiEnvThreadState *ets, JvmtiFramePop fpop) {
   MutexLocker mu(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();
   }
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/prims/jvmtiEventController.cpp@f008d3631bd1 (annotated)

src/share/vm/prims/jvmtiEventController.cpp