hotspot/src/share/vm/services/threadService.cpp
author dcubed
Wed, 27 Feb 2013 15:00:30 -0800
changeset 15853 1c4e16950e96
parent 13952 e3cf184080bc
child 18085 fb6d02a9e1c5
permissions -rw-r--r--
8007476: assert(the_owner != NULL) failed: Did not find owning Java thread for lock word address Summary: Make deadlock detection a little more robust in the case of being unable to find the JavaThread associated with an object lock. Reviewed-by: sla, acorn
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/*
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 * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 *
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 */
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#include "precompiled.hpp"
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#include "classfile/systemDictionary.hpp"
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#include "memory/allocation.hpp"
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#include "memory/heapInspection.hpp"
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#include "memory/oopFactory.hpp"
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#include "oops/instanceKlass.hpp"
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#include "oops/oop.inline.hpp"
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#include "runtime/handles.inline.hpp"
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#include "runtime/init.hpp"
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#include "runtime/thread.hpp"
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#include "runtime/vframe.hpp"
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#include "runtime/vmThread.hpp"
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#include "runtime/vm_operations.hpp"
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#include "services/threadService.hpp"
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// TODO: we need to define a naming convention for perf counters
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// to distinguish counters for:
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//   - standard JSR174 use
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//   - Hotspot extension (public and committed)
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//   - Hotspot extension (private/internal and uncommitted)
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// Default is disabled.
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bool ThreadService::_thread_monitoring_contention_enabled = false;
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bool ThreadService::_thread_cpu_time_enabled = false;
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bool ThreadService::_thread_allocated_memory_enabled = false;
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PerfCounter*  ThreadService::_total_threads_count = NULL;
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PerfVariable* ThreadService::_live_threads_count = NULL;
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PerfVariable* ThreadService::_peak_threads_count = NULL;
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PerfVariable* ThreadService::_daemon_threads_count = NULL;
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volatile int ThreadService::_exiting_threads_count = 0;
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volatile int ThreadService::_exiting_daemon_threads_count = 0;
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ThreadDumpResult* ThreadService::_threaddump_list = NULL;
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static const int INITIAL_ARRAY_SIZE = 10;
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void ThreadService::init() {
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  EXCEPTION_MARK;
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  // These counters are for java.lang.management API support.
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  // They are created even if -XX:-UsePerfData is set and in
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  // that case, they will be allocated on C heap.
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  _total_threads_count =
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                PerfDataManager::create_counter(JAVA_THREADS, "started",
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                                                PerfData::U_Events, CHECK);
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  _live_threads_count =
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                PerfDataManager::create_variable(JAVA_THREADS, "live",
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                                                 PerfData::U_None, CHECK);
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  _peak_threads_count =
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                PerfDataManager::create_variable(JAVA_THREADS, "livePeak",
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                                                 PerfData::U_None, CHECK);
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  _daemon_threads_count =
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                PerfDataManager::create_variable(JAVA_THREADS, "daemon",
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                                                 PerfData::U_None, CHECK);
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  if (os::is_thread_cpu_time_supported()) {
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    _thread_cpu_time_enabled = true;
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  }
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  _thread_allocated_memory_enabled = true; // Always on, so enable it
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}
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void ThreadService::reset_peak_thread_count() {
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  // Acquire the lock to update the peak thread count
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  // to synchronize with thread addition and removal.
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  MutexLockerEx mu(Threads_lock);
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  _peak_threads_count->set_value(get_live_thread_count());
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}
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void ThreadService::add_thread(JavaThread* thread, bool daemon) {
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  // Do not count VM internal or JVMTI agent threads
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  if (thread->is_hidden_from_external_view() ||
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      thread->is_jvmti_agent_thread()) {
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    return;
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  }
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  _total_threads_count->inc();
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  _live_threads_count->inc();
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  if (_live_threads_count->get_value() > _peak_threads_count->get_value()) {
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    _peak_threads_count->set_value(_live_threads_count->get_value());
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  }
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  if (daemon) {
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    _daemon_threads_count->inc();
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  }
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}
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void ThreadService::remove_thread(JavaThread* thread, bool daemon) {
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  Atomic::dec((jint*) &_exiting_threads_count);
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  if (thread->is_hidden_from_external_view() ||
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      thread->is_jvmti_agent_thread()) {
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    return;
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  }
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  _live_threads_count->set_value(_live_threads_count->get_value() - 1);
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  if (daemon) {
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    _daemon_threads_count->set_value(_daemon_threads_count->get_value() - 1);
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    Atomic::dec((jint*) &_exiting_daemon_threads_count);
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  }
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}
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void ThreadService::current_thread_exiting(JavaThread* jt) {
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  assert(jt == JavaThread::current(), "Called by current thread");
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  Atomic::inc((jint*) &_exiting_threads_count);
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  oop threadObj = jt->threadObj();
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  if (threadObj != NULL && java_lang_Thread::is_daemon(threadObj)) {
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    Atomic::inc((jint*) &_exiting_daemon_threads_count);
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  }
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}
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// FIXME: JVMTI should call this function
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Handle ThreadService::get_current_contended_monitor(JavaThread* thread) {
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  assert(thread != NULL, "should be non-NULL");
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  assert(Threads_lock->owned_by_self(), "must grab Threads_lock or be at safepoint");
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  ObjectMonitor *wait_obj = thread->current_waiting_monitor();
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  oop obj = NULL;
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  if (wait_obj != NULL) {
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    // thread is doing an Object.wait() call
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    obj = (oop) wait_obj->object();
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    assert(obj != NULL, "Object.wait() should have an object");
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  } else {
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    ObjectMonitor *enter_obj = thread->current_pending_monitor();
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    if (enter_obj != NULL) {
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      // thread is trying to enter() or raw_enter() an ObjectMonitor.
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      obj = (oop) enter_obj->object();
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    }
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    // If obj == NULL, then ObjectMonitor is raw which doesn't count.
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  }
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  Handle h(obj);
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  return h;
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}
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bool ThreadService::set_thread_monitoring_contention(bool flag) {
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  MutexLocker m(Management_lock);
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  bool prev = _thread_monitoring_contention_enabled;
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  _thread_monitoring_contention_enabled = flag;
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  return prev;
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}
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bool ThreadService::set_thread_cpu_time_enabled(bool flag) {
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  MutexLocker m(Management_lock);
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  bool prev = _thread_cpu_time_enabled;
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  _thread_cpu_time_enabled = flag;
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  return prev;
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}
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bool ThreadService::set_thread_allocated_memory_enabled(bool flag) {
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  MutexLocker m(Management_lock);
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  bool prev = _thread_allocated_memory_enabled;
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  _thread_allocated_memory_enabled = flag;
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  return prev;
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}
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1
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// GC support
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void ThreadService::oops_do(OopClosure* f) {
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  for (ThreadDumpResult* dump = _threaddump_list; dump != NULL; dump = dump->next()) {
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    dump->oops_do(f);
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  }
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}
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void ThreadService::add_thread_dump(ThreadDumpResult* dump) {
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  MutexLocker ml(Management_lock);
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  if (_threaddump_list == NULL) {
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    _threaddump_list = dump;
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  } else {
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    dump->set_next(_threaddump_list);
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    _threaddump_list = dump;
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  }
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}
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void ThreadService::remove_thread_dump(ThreadDumpResult* dump) {
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  MutexLocker ml(Management_lock);
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  ThreadDumpResult* prev = NULL;
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  bool found = false;
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  for (ThreadDumpResult* d = _threaddump_list; d != NULL; prev = d, d = d->next()) {
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    if (d == dump) {
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      if (prev == NULL) {
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        _threaddump_list = dump->next();
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      } else {
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        prev->set_next(dump->next());
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      }
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      found = true;
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      break;
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    }
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  }
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  assert(found, "The threaddump result to be removed must exist.");
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}
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// Dump stack trace of threads specified in the given threads array.
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// Returns StackTraceElement[][] each element is the stack trace of a thread in
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// the corresponding entry in the given threads array
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Handle ThreadService::dump_stack_traces(GrowableArray<instanceHandle>* threads,
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                                        int num_threads,
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                                        TRAPS) {
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  assert(num_threads > 0, "just checking");
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  ThreadDumpResult dump_result;
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  VM_ThreadDump op(&dump_result,
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                   threads,
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                   num_threads,
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                   -1,    /* entire stack */
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                   false, /* with locked monitors */
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                   false  /* with locked synchronizers */);
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  VMThread::execute(&op);
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  // Allocate the resulting StackTraceElement[][] object
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  ResourceMark rm(THREAD);
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  Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_StackTraceElement_array(), true, CHECK_NH);
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  ObjArrayKlass* ik = ObjArrayKlass::cast(k);
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  objArrayOop r = oopFactory::new_objArray(ik, num_threads, CHECK_NH);
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  objArrayHandle result_obj(THREAD, r);
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  int num_snapshots = dump_result.num_snapshots();
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  assert(num_snapshots == num_threads, "Must have num_threads thread snapshots");
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  int i = 0;
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  for (ThreadSnapshot* ts = dump_result.snapshots(); ts != NULL; i++, ts = ts->next()) {
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    ThreadStackTrace* stacktrace = ts->get_stack_trace();
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    if (stacktrace == NULL) {
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      // No stack trace
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      result_obj->obj_at_put(i, NULL);
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    } else {
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      // Construct an array of java/lang/StackTraceElement object
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      Handle backtrace_h = stacktrace->allocate_fill_stack_trace_element_array(CHECK_NH);
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      result_obj->obj_at_put(i, backtrace_h());
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    }
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  }
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  return result_obj;
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}
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void ThreadService::reset_contention_count_stat(JavaThread* thread) {
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  ThreadStatistics* stat = thread->get_thread_stat();
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  if (stat != NULL) {
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    stat->reset_count_stat();
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  }
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}
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void ThreadService::reset_contention_time_stat(JavaThread* thread) {
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  ThreadStatistics* stat = thread->get_thread_stat();
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  if (stat != NULL) {
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    stat->reset_time_stat();
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  }
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}
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// Find deadlocks involving object monitors and concurrent locks if concurrent_locks is true
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DeadlockCycle* ThreadService::find_deadlocks_at_safepoint(bool concurrent_locks) {
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  // This code was modified from the original Threads::find_deadlocks code.
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  int globalDfn = 0, thisDfn;
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  ObjectMonitor* waitingToLockMonitor = NULL;
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  oop waitingToLockBlocker = NULL;
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  bool blocked_on_monitor = false;
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  JavaThread *currentThread, *previousThread;
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  int num_deadlocks = 0;
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  for (JavaThread* p = Threads::first(); p != NULL; p = p->next()) {
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    // Initialize the depth-first-number
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    p->set_depth_first_number(-1);
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  }
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  DeadlockCycle* deadlocks = NULL;
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  DeadlockCycle* last = NULL;
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  DeadlockCycle* cycle = new DeadlockCycle();
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  for (JavaThread* jt = Threads::first(); jt != NULL; jt = jt->next()) {
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    if (jt->depth_first_number() >= 0) {
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      // this thread was already visited
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      continue;
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    }
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    thisDfn = globalDfn;
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    jt->set_depth_first_number(globalDfn++);
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    previousThread = jt;
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    currentThread = jt;
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    cycle->reset();
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    // When there is a deadlock, all the monitors involved in the dependency
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    // cycle must be contended and heavyweight. So we only care about the
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    // heavyweight monitor a thread is waiting to lock.
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    waitingToLockMonitor = (ObjectMonitor*)jt->current_pending_monitor();
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    if (concurrent_locks) {
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      waitingToLockBlocker = jt->current_park_blocker();
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    }
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   327
    while (waitingToLockMonitor != NULL || waitingToLockBlocker != NULL) {
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      cycle->add_thread(currentThread);
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      if (waitingToLockMonitor != NULL) {
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        currentThread = Threads::owning_thread_from_monitor_owner(
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                          (address)waitingToLockMonitor->owner(),
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                          false /* no locking needed */);
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   333
        if (currentThread == NULL) {
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   334
          // This function is called at a safepoint so the JavaThread
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   335
          // that owns waitingToLockMonitor should be findable, but
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   336
          // if it is not findable, then the previous currentThread is
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          // blocked permanently. We record this as a deadlock.
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   338
          num_deadlocks++;
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   339
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   340
          cycle->set_deadlock(true);
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   341
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   342
          // add this cycle to the deadlocks list
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   343
          if (deadlocks == NULL) {
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   344
            deadlocks = cycle;
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   345
          } else {
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   346
            last->set_next(cycle);
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   347
          }
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   348
          last = cycle;
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   349
          cycle = new DeadlockCycle();
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   350
          break;
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   351
        }
1
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      } else {
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   353
        if (concurrent_locks) {
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   354
          if (waitingToLockBlocker->is_a(SystemDictionary::abstract_ownable_synchronizer_klass())) {
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   355
            oop threadObj = java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(waitingToLockBlocker);
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   356
            currentThread = threadObj != NULL ? java_lang_Thread::thread(threadObj) : NULL;
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   357
          } else {
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   358
            currentThread = NULL;
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   359
          }
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        }
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   361
      }
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   362
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   363
      if (currentThread == NULL) {
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   364
        // No dependency on another thread
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   365
        break;
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   366
      }
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   367
      if (currentThread->depth_first_number() < 0) {
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   368
        // First visit to this thread
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   369
        currentThread->set_depth_first_number(globalDfn++);
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   370
      } else if (currentThread->depth_first_number() < thisDfn) {
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   371
        // Thread already visited, and not on a (new) cycle
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   372
        break;
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   373
      } else if (currentThread == previousThread) {
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   374
        // Self-loop, ignore
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   375
        break;
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   376
      } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   377
        // We have a (new) cycle
489c9b5090e2 Initial load
duke
parents:
diff changeset
   378
        num_deadlocks++;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   379
489c9b5090e2 Initial load
duke
parents:
diff changeset
   380
        cycle->set_deadlock(true);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   381
489c9b5090e2 Initial load
duke
parents:
diff changeset
   382
        // add this cycle to the deadlocks list
489c9b5090e2 Initial load
duke
parents:
diff changeset
   383
        if (deadlocks == NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   384
          deadlocks = cycle;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   385
        } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   386
          last->set_next(cycle);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   387
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   388
        last = cycle;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   389
        cycle = new DeadlockCycle();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   390
        break;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   391
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   392
      previousThread = currentThread;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   393
      waitingToLockMonitor = (ObjectMonitor*)currentThread->current_pending_monitor();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   394
      if (concurrent_locks) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   395
        waitingToLockBlocker = currentThread->current_park_blocker();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   396
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   397
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   398
489c9b5090e2 Initial load
duke
parents:
diff changeset
   399
  }
11420
22ec1bad0dce 7125594: C-heap growth issue in ThreadService::find_deadlocks_at_safepoint
fparain
parents: 10739
diff changeset
   400
  delete cycle;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   401
  return deadlocks;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   402
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   403
489c9b5090e2 Initial load
duke
parents:
diff changeset
   404
ThreadDumpResult::ThreadDumpResult() : _num_threads(0), _num_snapshots(0), _snapshots(NULL), _next(NULL), _last(NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   405
489c9b5090e2 Initial load
duke
parents:
diff changeset
   406
  // Create a new ThreadDumpResult object and append to the list.
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   407
  // If GC happens before this function returns, Method*
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   408
  // in the stack trace will be visited.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   409
  ThreadService::add_thread_dump(this);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   410
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   411
489c9b5090e2 Initial load
duke
parents:
diff changeset
   412
ThreadDumpResult::ThreadDumpResult(int num_threads) : _num_threads(num_threads), _num_snapshots(0), _snapshots(NULL), _next(NULL), _last(NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   413
  // Create a new ThreadDumpResult object and append to the list.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   414
  // If GC happens before this function returns, oops
489c9b5090e2 Initial load
duke
parents:
diff changeset
   415
  // will be visited.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   416
  ThreadService::add_thread_dump(this);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   417
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   418
489c9b5090e2 Initial load
duke
parents:
diff changeset
   419
ThreadDumpResult::~ThreadDumpResult() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   420
  ThreadService::remove_thread_dump(this);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   421
489c9b5090e2 Initial load
duke
parents:
diff changeset
   422
  // free all the ThreadSnapshot objects created during
489c9b5090e2 Initial load
duke
parents:
diff changeset
   423
  // the VM_ThreadDump operation
489c9b5090e2 Initial load
duke
parents:
diff changeset
   424
  ThreadSnapshot* ts = _snapshots;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   425
  while (ts != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   426
    ThreadSnapshot* p = ts;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   427
    ts = ts->next();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   428
    delete p;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   429
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   430
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   431
489c9b5090e2 Initial load
duke
parents:
diff changeset
   432
489c9b5090e2 Initial load
duke
parents:
diff changeset
   433
void ThreadDumpResult::add_thread_snapshot(ThreadSnapshot* ts) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   434
  assert(_num_threads == 0 || _num_snapshots < _num_threads,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   435
         "_num_snapshots must be less than _num_threads");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   436
  _num_snapshots++;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   437
  if (_snapshots == NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   438
    _snapshots = ts;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   439
  } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   440
    _last->set_next(ts);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   441
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   442
  _last = ts;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   443
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   444
489c9b5090e2 Initial load
duke
parents:
diff changeset
   445
void ThreadDumpResult::oops_do(OopClosure* f) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   446
  for (ThreadSnapshot* ts = _snapshots; ts != NULL; ts = ts->next()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   447
    ts->oops_do(f);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   448
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   449
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   450
489c9b5090e2 Initial load
duke
parents:
diff changeset
   451
StackFrameInfo::StackFrameInfo(javaVFrame* jvf, bool with_lock_info) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   452
  _method = jvf->method();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   453
  _bci = jvf->bci();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   454
  _locked_monitors = NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   455
  if (with_lock_info) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   456
    ResourceMark rm;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   457
    GrowableArray<MonitorInfo*>* list = jvf->locked_monitors();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   458
    int length = list->length();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   459
    if (length > 0) {
13195
be27e1b6a4b9 6995781: Native Memory Tracking (Phase 1)
zgu
parents: 11420
diff changeset
   460
      _locked_monitors = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<oop>(length, true);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   461
      for (int i = 0; i < length; i++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   462
        MonitorInfo* monitor = list->at(i);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   463
        assert(monitor->owner(), "This monitor must have an owning object");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   464
        _locked_monitors->append(monitor->owner());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   465
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   466
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   467
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   468
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   469
489c9b5090e2 Initial load
duke
parents:
diff changeset
   470
void StackFrameInfo::oops_do(OopClosure* f) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   471
  if (_locked_monitors != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   472
    int length = _locked_monitors->length();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   473
    for (int i = 0; i < length; i++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   474
      f->do_oop((oop*) _locked_monitors->adr_at(i));
489c9b5090e2 Initial load
duke
parents:
diff changeset
   475
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   476
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   477
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   478
489c9b5090e2 Initial load
duke
parents:
diff changeset
   479
void StackFrameInfo::print_on(outputStream* st) const {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   480
  ResourceMark rm;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   481
  java_lang_Throwable::print_stack_element(st, method(), bci());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   482
  int len = (_locked_monitors != NULL ? _locked_monitors->length() : 0);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   483
  for (int i = 0; i < len; i++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   484
    oop o = _locked_monitors->at(i);
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   485
    InstanceKlass* ik = InstanceKlass::cast(o->klass());
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   486
    st->print_cr("\t- locked <" INTPTR_FORMAT "> (a %s)", (address)o, ik->external_name());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   487
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   488
489c9b5090e2 Initial load
duke
parents:
diff changeset
   489
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   490
489c9b5090e2 Initial load
duke
parents:
diff changeset
   491
// Iterate through monitor cache to find JNI locked monitors
489c9b5090e2 Initial load
duke
parents:
diff changeset
   492
class InflatedMonitorsClosure: public MonitorClosure {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   493
private:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   494
  ThreadStackTrace* _stack_trace;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   495
  Thread* _thread;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   496
public:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   497
  InflatedMonitorsClosure(Thread* t, ThreadStackTrace* st) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   498
    _thread = t;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   499
    _stack_trace = st;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   500
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   501
  void do_monitor(ObjectMonitor* mid) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   502
    if (mid->owner() == _thread) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   503
      oop object = (oop) mid->object();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   504
      if (!_stack_trace->is_owned_monitor_on_stack(object)) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   505
        _stack_trace->add_jni_locked_monitor(object);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   506
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   507
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   508
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   509
};
489c9b5090e2 Initial load
duke
parents:
diff changeset
   510
489c9b5090e2 Initial load
duke
parents:
diff changeset
   511
ThreadStackTrace::ThreadStackTrace(JavaThread* t, bool with_locked_monitors) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   512
  _thread = t;
13195
be27e1b6a4b9 6995781: Native Memory Tracking (Phase 1)
zgu
parents: 11420
diff changeset
   513
  _frames = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<StackFrameInfo*>(INITIAL_ARRAY_SIZE, true);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   514
  _depth = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   515
  _with_locked_monitors = with_locked_monitors;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   516
  if (_with_locked_monitors) {
13195
be27e1b6a4b9 6995781: Native Memory Tracking (Phase 1)
zgu
parents: 11420
diff changeset
   517
    _jni_locked_monitors = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<oop>(INITIAL_ARRAY_SIZE, true);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   518
  } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   519
    _jni_locked_monitors = NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   520
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   521
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   522
489c9b5090e2 Initial load
duke
parents:
diff changeset
   523
ThreadStackTrace::~ThreadStackTrace() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   524
  for (int i = 0; i < _frames->length(); i++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   525
    delete _frames->at(i);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   526
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   527
  delete _frames;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   528
  if (_jni_locked_monitors != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   529
    delete _jni_locked_monitors;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   530
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   531
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   532
489c9b5090e2 Initial load
duke
parents:
diff changeset
   533
void ThreadStackTrace::dump_stack_at_safepoint(int maxDepth) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   534
  assert(SafepointSynchronize::is_at_safepoint(), "all threads are stopped");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   535
489c9b5090e2 Initial load
duke
parents:
diff changeset
   536
  if (_thread->has_last_Java_frame()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   537
    RegisterMap reg_map(_thread);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   538
    vframe* start_vf = _thread->last_java_vframe(&reg_map);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   539
    int count = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   540
    for (vframe* f = start_vf; f; f = f->sender() ) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   541
      if (f->is_java_frame()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   542
        javaVFrame* jvf = javaVFrame::cast(f);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   543
        add_stack_frame(jvf);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   544
        count++;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   545
      } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   546
        // Ignore non-Java frames
489c9b5090e2 Initial load
duke
parents:
diff changeset
   547
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   548
      if (maxDepth > 0 && count == maxDepth) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   549
        // Skip frames if more than maxDepth
489c9b5090e2 Initial load
duke
parents:
diff changeset
   550
        break;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   551
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   552
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   553
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   554
489c9b5090e2 Initial load
duke
parents:
diff changeset
   555
  if (_with_locked_monitors) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   556
    // Iterate inflated monitors and find monitors locked by this thread
489c9b5090e2 Initial load
duke
parents:
diff changeset
   557
    // not found in the stack
489c9b5090e2 Initial load
duke
parents:
diff changeset
   558
    InflatedMonitorsClosure imc(_thread, this);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   559
    ObjectSynchronizer::monitors_iterate(&imc);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   560
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   561
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   562
489c9b5090e2 Initial load
duke
parents:
diff changeset
   563
489c9b5090e2 Initial load
duke
parents:
diff changeset
   564
bool ThreadStackTrace::is_owned_monitor_on_stack(oop object) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   565
  assert(SafepointSynchronize::is_at_safepoint(), "all threads are stopped");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   566
489c9b5090e2 Initial load
duke
parents:
diff changeset
   567
  bool found = false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   568
  int num_frames = get_stack_depth();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   569
  for (int depth = 0; depth < num_frames; depth++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   570
    StackFrameInfo* frame = stack_frame_at(depth);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   571
    int len = frame->num_locked_monitors();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   572
    GrowableArray<oop>* locked_monitors = frame->locked_monitors();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   573
    for (int j = 0; j < len; j++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   574
      oop monitor = locked_monitors->at(j);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   575
      assert(monitor != NULL && monitor->is_instance(), "must be a Java object");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   576
      if (monitor == object) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   577
        found = true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   578
        break;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   579
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   580
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   581
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   582
  return found;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   583
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   584
489c9b5090e2 Initial load
duke
parents:
diff changeset
   585
Handle ThreadStackTrace::allocate_fill_stack_trace_element_array(TRAPS) {
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   586
  Klass* k = SystemDictionary::StackTraceElement_klass();
379
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 1
diff changeset
   587
  assert(k != NULL, "must be loaded in 1.4+");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   588
  instanceKlassHandle ik(THREAD, k);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   589
489c9b5090e2 Initial load
duke
parents:
diff changeset
   590
  // Allocate an array of java/lang/StackTraceElement object
489c9b5090e2 Initial load
duke
parents:
diff changeset
   591
  objArrayOop ste = oopFactory::new_objArray(ik(), _depth, CHECK_NH);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   592
  objArrayHandle backtrace(THREAD, ste);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   593
  for (int j = 0; j < _depth; j++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   594
    StackFrameInfo* frame = _frames->at(j);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   595
    methodHandle mh(THREAD, frame->method());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   596
    oop element = java_lang_StackTraceElement::create(mh, frame->bci(), CHECK_NH);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   597
    backtrace->obj_at_put(j, element);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   598
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   599
  return backtrace;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   600
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   601
489c9b5090e2 Initial load
duke
parents:
diff changeset
   602
void ThreadStackTrace::add_stack_frame(javaVFrame* jvf) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   603
  StackFrameInfo* frame = new StackFrameInfo(jvf, _with_locked_monitors);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   604
  _frames->append(frame);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   605
  _depth++;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   606
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   607
489c9b5090e2 Initial load
duke
parents:
diff changeset
   608
void ThreadStackTrace::oops_do(OopClosure* f) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   609
  int length = _frames->length();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   610
  for (int i = 0; i < length; i++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   611
    _frames->at(i)->oops_do(f);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   612
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   613
489c9b5090e2 Initial load
duke
parents:
diff changeset
   614
  length = (_jni_locked_monitors != NULL ? _jni_locked_monitors->length() : 0);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   615
  for (int j = 0; j < length; j++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   616
    f->do_oop((oop*) _jni_locked_monitors->adr_at(j));
489c9b5090e2 Initial load
duke
parents:
diff changeset
   617
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   618
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   619
489c9b5090e2 Initial load
duke
parents:
diff changeset
   620
ConcurrentLocksDump::~ConcurrentLocksDump() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   621
  if (_retain_map_on_free) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   622
    return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   623
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   624
489c9b5090e2 Initial load
duke
parents:
diff changeset
   625
  for (ThreadConcurrentLocks* t = _map; t != NULL;)  {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   626
    ThreadConcurrentLocks* tcl = t;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   627
    t = t->next();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   628
    delete tcl;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   629
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   630
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   631
489c9b5090e2 Initial load
duke
parents:
diff changeset
   632
void ConcurrentLocksDump::dump_at_safepoint() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   633
  // dump all locked concurrent locks
489c9b5090e2 Initial load
duke
parents:
diff changeset
   634
  assert(SafepointSynchronize::is_at_safepoint(), "all threads are stopped");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   635
489c9b5090e2 Initial load
duke
parents:
diff changeset
   636
  if (JDK_Version::is_gte_jdk16x_version()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   637
    ResourceMark rm;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   638
489c9b5090e2 Initial load
duke
parents:
diff changeset
   639
    GrowableArray<oop>* aos_objects = new GrowableArray<oop>(INITIAL_ARRAY_SIZE);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   640
489c9b5090e2 Initial load
duke
parents:
diff changeset
   641
    // Find all instances of AbstractOwnableSynchronizer
489c9b5090e2 Initial load
duke
parents:
diff changeset
   642
    HeapInspection::find_instances_at_safepoint(SystemDictionary::abstract_ownable_synchronizer_klass(),
489c9b5090e2 Initial load
duke
parents:
diff changeset
   643
                                                aos_objects);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   644
    // Build a map of thread to its owned AQS locks
489c9b5090e2 Initial load
duke
parents:
diff changeset
   645
    build_map(aos_objects);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   646
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   647
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   648
489c9b5090e2 Initial load
duke
parents:
diff changeset
   649
489c9b5090e2 Initial load
duke
parents:
diff changeset
   650
// build a map of JavaThread to all its owned AbstractOwnableSynchronizer
489c9b5090e2 Initial load
duke
parents:
diff changeset
   651
void ConcurrentLocksDump::build_map(GrowableArray<oop>* aos_objects) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   652
  int length = aos_objects->length();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   653
  for (int i = 0; i < length; i++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   654
    oop o = aos_objects->at(i);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   655
    oop owner_thread_obj = java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(o);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   656
    if (owner_thread_obj != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   657
      JavaThread* thread = java_lang_Thread::thread(owner_thread_obj);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   658
      assert(o->is_instance(), "Must be an instanceOop");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   659
      add_lock(thread, (instanceOop) o);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   660
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   661
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   662
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   663
489c9b5090e2 Initial load
duke
parents:
diff changeset
   664
void ConcurrentLocksDump::add_lock(JavaThread* thread, instanceOop o) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   665
  ThreadConcurrentLocks* tcl = thread_concurrent_locks(thread);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   666
  if (tcl != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   667
    tcl->add_lock(o);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   668
    return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   669
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   670
489c9b5090e2 Initial load
duke
parents:
diff changeset
   671
  // First owned lock found for this thread
489c9b5090e2 Initial load
duke
parents:
diff changeset
   672
  tcl = new ThreadConcurrentLocks(thread);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   673
  tcl->add_lock(o);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   674
  if (_map == NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   675
    _map = tcl;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   676
  } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   677
    _last->set_next(tcl);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   678
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   679
  _last = tcl;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   680
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   681
489c9b5090e2 Initial load
duke
parents:
diff changeset
   682
ThreadConcurrentLocks* ConcurrentLocksDump::thread_concurrent_locks(JavaThread* thread) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   683
  for (ThreadConcurrentLocks* tcl = _map; tcl != NULL; tcl = tcl->next()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   684
    if (tcl->java_thread() == thread) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   685
      return tcl;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   686
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   687
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   688
  return NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   689
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   690
489c9b5090e2 Initial load
duke
parents:
diff changeset
   691
void ConcurrentLocksDump::print_locks_on(JavaThread* t, outputStream* st) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   692
  st->print_cr("   Locked ownable synchronizers:");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   693
  ThreadConcurrentLocks* tcl = thread_concurrent_locks(t);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   694
  GrowableArray<instanceOop>* locks = (tcl != NULL ? tcl->owned_locks() : NULL);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   695
  if (locks == NULL || locks->is_empty()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   696
    st->print_cr("\t- None");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   697
    st->cr();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   698
    return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   699
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   700
489c9b5090e2 Initial load
duke
parents:
diff changeset
   701
  for (int i = 0; i < locks->length(); i++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   702
    instanceOop obj = locks->at(i);
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   703
    InstanceKlass* ik = InstanceKlass::cast(obj->klass());
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   704
    st->print_cr("\t- <" INTPTR_FORMAT "> (a %s)", (address)obj, ik->external_name());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   705
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   706
  st->cr();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   707
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   708
489c9b5090e2 Initial load
duke
parents:
diff changeset
   709
ThreadConcurrentLocks::ThreadConcurrentLocks(JavaThread* thread) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   710
  _thread = thread;
13195
be27e1b6a4b9 6995781: Native Memory Tracking (Phase 1)
zgu
parents: 11420
diff changeset
   711
  _owned_locks = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<instanceOop>(INITIAL_ARRAY_SIZE, true);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   712
  _next = NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   713
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   714
489c9b5090e2 Initial load
duke
parents:
diff changeset
   715
ThreadConcurrentLocks::~ThreadConcurrentLocks() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   716
  delete _owned_locks;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   717
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   718
489c9b5090e2 Initial load
duke
parents:
diff changeset
   719
void ThreadConcurrentLocks::add_lock(instanceOop o) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   720
  _owned_locks->append(o);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   721
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   722
489c9b5090e2 Initial load
duke
parents:
diff changeset
   723
void ThreadConcurrentLocks::oops_do(OopClosure* f) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   724
  int length = _owned_locks->length();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   725
  for (int i = 0; i < length; i++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   726
    f->do_oop((oop*) _owned_locks->adr_at(i));
489c9b5090e2 Initial load
duke
parents:
diff changeset
   727
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   728
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   729
489c9b5090e2 Initial load
duke
parents:
diff changeset
   730
ThreadStatistics::ThreadStatistics() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   731
  _contended_enter_count = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   732
  _monitor_wait_count = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   733
  _sleep_count = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   734
  _count_pending_reset = false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   735
  _timer_pending_reset = false;
3575
224791e7ecab 6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents: 950
diff changeset
   736
  memset((void*) _perf_recursion_counts, 0, sizeof(_perf_recursion_counts));
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   737
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   738
489c9b5090e2 Initial load
duke
parents:
diff changeset
   739
ThreadSnapshot::ThreadSnapshot(JavaThread* thread) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   740
  _thread = thread;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   741
  _threadObj = thread->threadObj();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   742
  _stack_trace = NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   743
  _concurrent_locks = NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   744
  _next = NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   745
489c9b5090e2 Initial load
duke
parents:
diff changeset
   746
  ThreadStatistics* stat = thread->get_thread_stat();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   747
  _contended_enter_ticks = stat->contended_enter_ticks();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   748
  _contended_enter_count = stat->contended_enter_count();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   749
  _monitor_wait_ticks = stat->monitor_wait_ticks();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   750
  _monitor_wait_count = stat->monitor_wait_count();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   751
  _sleep_ticks = stat->sleep_ticks();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   752
  _sleep_count = stat->sleep_count();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   753
489c9b5090e2 Initial load
duke
parents:
diff changeset
   754
  _blocker_object = NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   755
  _blocker_object_owner = NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   756
489c9b5090e2 Initial load
duke
parents:
diff changeset
   757
  _thread_status = java_lang_Thread::get_thread_status(_threadObj);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   758
  _is_ext_suspended = thread->is_being_ext_suspended();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   759
  _is_in_native = (thread->thread_state() == _thread_in_native);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   760
489c9b5090e2 Initial load
duke
parents:
diff changeset
   761
  if (_thread_status == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER ||
489c9b5090e2 Initial load
duke
parents:
diff changeset
   762
      _thread_status == java_lang_Thread::IN_OBJECT_WAIT ||
489c9b5090e2 Initial load
duke
parents:
diff changeset
   763
      _thread_status == java_lang_Thread::IN_OBJECT_WAIT_TIMED) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   764
489c9b5090e2 Initial load
duke
parents:
diff changeset
   765
    Handle obj = ThreadService::get_current_contended_monitor(thread);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   766
    if (obj() == NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   767
      // monitor no longer exists; thread is not blocked
489c9b5090e2 Initial load
duke
parents:
diff changeset
   768
      _thread_status = java_lang_Thread::RUNNABLE;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   769
    } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   770
      _blocker_object = obj();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   771
      JavaThread* owner = ObjectSynchronizer::get_lock_owner(obj, false);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   772
      if ((owner == NULL && _thread_status == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER)
10739
91935236600e 7098194: integrate macosx-port changes
dcubed
parents: 8076
diff changeset
   773
          || (owner != NULL && owner->is_attaching_via_jni())) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   774
        // ownership information of the monitor is not available
489c9b5090e2 Initial load
duke
parents:
diff changeset
   775
        // (may no longer be owned or releasing to some other thread)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   776
        // make this thread in RUNNABLE state.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   777
        // And when the owner thread is in attaching state, the java thread
489c9b5090e2 Initial load
duke
parents:
diff changeset
   778
        // is not completely initialized. For example thread name and id
489c9b5090e2 Initial load
duke
parents:
diff changeset
   779
        // and may not be set, so hide the attaching thread.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   780
        _thread_status = java_lang_Thread::RUNNABLE;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   781
        _blocker_object = NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   782
      } else if (owner != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   783
        _blocker_object_owner = owner->threadObj();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   784
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   785
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   786
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   787
489c9b5090e2 Initial load
duke
parents:
diff changeset
   788
  // Support for JSR-166 locks
950
6112b627bb36 6721093: -XX:AppendRatio=N not supported
kamg
parents: 670
diff changeset
   789
  if (JDK_Version::current().supports_thread_park_blocker() &&
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   790
        (_thread_status == java_lang_Thread::PARKED ||
489c9b5090e2 Initial load
duke
parents:
diff changeset
   791
         _thread_status == java_lang_Thread::PARKED_TIMED)) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   792
489c9b5090e2 Initial load
duke
parents:
diff changeset
   793
    _blocker_object = thread->current_park_blocker();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   794
    if (_blocker_object != NULL && _blocker_object->is_a(SystemDictionary::abstract_ownable_synchronizer_klass())) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   795
      _blocker_object_owner = java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(_blocker_object);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   796
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   797
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   798
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   799
489c9b5090e2 Initial load
duke
parents:
diff changeset
   800
ThreadSnapshot::~ThreadSnapshot() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   801
  delete _stack_trace;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   802
  delete _concurrent_locks;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   803
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   804
489c9b5090e2 Initial load
duke
parents:
diff changeset
   805
void ThreadSnapshot::dump_stack_at_safepoint(int max_depth, bool with_locked_monitors) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   806
  _stack_trace = new ThreadStackTrace(_thread, with_locked_monitors);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   807
  _stack_trace->dump_stack_at_safepoint(max_depth);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   808
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   809
489c9b5090e2 Initial load
duke
parents:
diff changeset
   810
489c9b5090e2 Initial load
duke
parents:
diff changeset
   811
void ThreadSnapshot::oops_do(OopClosure* f) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   812
  f->do_oop(&_threadObj);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   813
  f->do_oop(&_blocker_object);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   814
  f->do_oop(&_blocker_object_owner);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   815
  if (_stack_trace != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   816
    _stack_trace->oops_do(f);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   817
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   818
  if (_concurrent_locks != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   819
    _concurrent_locks->oops_do(f);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   820
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   821
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   822
489c9b5090e2 Initial load
duke
parents:
diff changeset
   823
DeadlockCycle::DeadlockCycle() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   824
  _is_deadlock = false;
13195
be27e1b6a4b9 6995781: Native Memory Tracking (Phase 1)
zgu
parents: 11420
diff changeset
   825
  _threads = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<JavaThread*>(INITIAL_ARRAY_SIZE, true);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   826
  _next = NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   827
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   828
489c9b5090e2 Initial load
duke
parents:
diff changeset
   829
DeadlockCycle::~DeadlockCycle() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   830
  delete _threads;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   831
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   832
489c9b5090e2 Initial load
duke
parents:
diff changeset
   833
void DeadlockCycle::print_on(outputStream* st) const {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   834
  st->cr();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   835
  st->print_cr("Found one Java-level deadlock:");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   836
  st->print("=============================");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   837
489c9b5090e2 Initial load
duke
parents:
diff changeset
   838
  JavaThread* currentThread;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   839
  ObjectMonitor* waitingToLockMonitor;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   840
  oop waitingToLockBlocker;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   841
  int len = _threads->length();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   842
  for (int i = 0; i < len; i++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   843
    currentThread = _threads->at(i);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   844
    waitingToLockMonitor = (ObjectMonitor*)currentThread->current_pending_monitor();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   845
    waitingToLockBlocker = currentThread->current_park_blocker();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   846
    st->cr();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   847
    st->print_cr("\"%s\":", currentThread->get_thread_name());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   848
    const char* owner_desc = ",\n  which is held by";
489c9b5090e2 Initial load
duke
parents:
diff changeset
   849
    if (waitingToLockMonitor != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   850
      st->print("  waiting to lock monitor " INTPTR_FORMAT, waitingToLockMonitor);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   851
      oop obj = (oop)waitingToLockMonitor->object();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   852
      if (obj != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   853
        st->print(" (object "INTPTR_FORMAT ", a %s)", (address)obj,
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   854
                   (InstanceKlass::cast(obj->klass()))->external_name());
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   855
489c9b5090e2 Initial load
duke
parents:
diff changeset
   856
        if (!currentThread->current_pending_monitor_is_from_java()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   857
          owner_desc = "\n  in JNI, which is held by";
489c9b5090e2 Initial load
duke
parents:
diff changeset
   858
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   859
      } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   860
        // No Java object associated - a JVMTI raw monitor
489c9b5090e2 Initial load
duke
parents:
diff changeset
   861
        owner_desc = " (JVMTI raw monitor),\n  which is held by";
489c9b5090e2 Initial load
duke
parents:
diff changeset
   862
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   863
      currentThread = Threads::owning_thread_from_monitor_owner(
15853
1c4e16950e96 8007476: assert(the_owner != NULL) failed: Did not find owning Java thread for lock word address
dcubed
parents: 13952
diff changeset
   864
                        (address)waitingToLockMonitor->owner(),
1c4e16950e96 8007476: assert(the_owner != NULL) failed: Did not find owning Java thread for lock word address
dcubed
parents: 13952
diff changeset
   865
                        false /* no locking needed */);
1c4e16950e96 8007476: assert(the_owner != NULL) failed: Did not find owning Java thread for lock word address
dcubed
parents: 13952
diff changeset
   866
      if (currentThread == NULL) {
1c4e16950e96 8007476: assert(the_owner != NULL) failed: Did not find owning Java thread for lock word address
dcubed
parents: 13952
diff changeset
   867
        // The deadlock was detected at a safepoint so the JavaThread
1c4e16950e96 8007476: assert(the_owner != NULL) failed: Did not find owning Java thread for lock word address
dcubed
parents: 13952
diff changeset
   868
        // that owns waitingToLockMonitor should be findable, but
1c4e16950e96 8007476: assert(the_owner != NULL) failed: Did not find owning Java thread for lock word address
dcubed
parents: 13952
diff changeset
   869
        // if it is not findable, then the previous currentThread is
1c4e16950e96 8007476: assert(the_owner != NULL) failed: Did not find owning Java thread for lock word address
dcubed
parents: 13952
diff changeset
   870
        // blocked permanently.
1c4e16950e96 8007476: assert(the_owner != NULL) failed: Did not find owning Java thread for lock word address
dcubed
parents: 13952
diff changeset
   871
        st->print("%s UNKNOWN_owner_addr=" PTR_FORMAT, owner_desc,
1c4e16950e96 8007476: assert(the_owner != NULL) failed: Did not find owning Java thread for lock word address
dcubed
parents: 13952
diff changeset
   872
                  (address)waitingToLockMonitor->owner());
1c4e16950e96 8007476: assert(the_owner != NULL) failed: Did not find owning Java thread for lock word address
dcubed
parents: 13952
diff changeset
   873
        continue;
1c4e16950e96 8007476: assert(the_owner != NULL) failed: Did not find owning Java thread for lock word address
dcubed
parents: 13952
diff changeset
   874
      }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   875
    } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   876
      st->print("  waiting for ownable synchronizer " INTPTR_FORMAT ", (a %s)",
489c9b5090e2 Initial load
duke
parents:
diff changeset
   877
                (address)waitingToLockBlocker,
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13195
diff changeset
   878
                (InstanceKlass::cast(waitingToLockBlocker->klass()))->external_name());
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   879
      assert(waitingToLockBlocker->is_a(SystemDictionary::abstract_ownable_synchronizer_klass()),
489c9b5090e2 Initial load
duke
parents:
diff changeset
   880
             "Must be an AbstractOwnableSynchronizer");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   881
      oop ownerObj = java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(waitingToLockBlocker);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   882
      currentThread = java_lang_Thread::thread(ownerObj);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   883
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   884
    st->print("%s \"%s\"", owner_desc, currentThread->get_thread_name());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   885
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   886
489c9b5090e2 Initial load
duke
parents:
diff changeset
   887
  st->cr();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   888
  st->cr();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   889
489c9b5090e2 Initial load
duke
parents:
diff changeset
   890
  // Print stack traces
489c9b5090e2 Initial load
duke
parents:
diff changeset
   891
  bool oldJavaMonitorsInStackTrace = JavaMonitorsInStackTrace;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   892
  JavaMonitorsInStackTrace = true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   893
  st->print_cr("Java stack information for the threads listed above:");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   894
  st->print_cr("===================================================");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   895
  for (int j = 0; j < len; j++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   896
    currentThread = _threads->at(j);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   897
    st->print_cr("\"%s\":", currentThread->get_thread_name());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   898
    currentThread->print_stack_on(st);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   899
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   900
  JavaMonitorsInStackTrace = oldJavaMonitorsInStackTrace;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   901
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   902
489c9b5090e2 Initial load
duke
parents:
diff changeset
   903
ThreadsListEnumerator::ThreadsListEnumerator(Thread* cur_thread,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   904
                                             bool include_jvmti_agent_threads,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   905
                                             bool include_jni_attaching_threads) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   906
  assert(cur_thread == Thread::current(), "Check current thread");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   907
489c9b5090e2 Initial load
duke
parents:
diff changeset
   908
  int init_size = ThreadService::get_live_thread_count();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   909
  _threads_array = new GrowableArray<instanceHandle>(init_size);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   910
489c9b5090e2 Initial load
duke
parents:
diff changeset
   911
  MutexLockerEx ml(Threads_lock);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   912
489c9b5090e2 Initial load
duke
parents:
diff changeset
   913
  for (JavaThread* jt = Threads::first(); jt != NULL; jt = jt->next()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   914
    // skips JavaThreads in the process of exiting
489c9b5090e2 Initial load
duke
parents:
diff changeset
   915
    // and also skips VM internal JavaThreads
489c9b5090e2 Initial load
duke
parents:
diff changeset
   916
    // Threads in _thread_new or _thread_new_trans state are included.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   917
    // i.e. threads have been started but not yet running.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   918
    if (jt->threadObj() == NULL   ||
489c9b5090e2 Initial load
duke
parents:
diff changeset
   919
        jt->is_exiting() ||
489c9b5090e2 Initial load
duke
parents:
diff changeset
   920
        !java_lang_Thread::is_alive(jt->threadObj())   ||
489c9b5090e2 Initial load
duke
parents:
diff changeset
   921
        jt->is_hidden_from_external_view()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   922
      continue;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   923
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   924
489c9b5090e2 Initial load
duke
parents:
diff changeset
   925
    // skip agent threads
489c9b5090e2 Initial load
duke
parents:
diff changeset
   926
    if (!include_jvmti_agent_threads && jt->is_jvmti_agent_thread()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   927
      continue;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   928
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   929
489c9b5090e2 Initial load
duke
parents:
diff changeset
   930
    // skip jni threads in the process of attaching
10739
91935236600e 7098194: integrate macosx-port changes
dcubed
parents: 8076
diff changeset
   931
    if (!include_jni_attaching_threads && jt->is_attaching_via_jni()) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   932
      continue;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   933
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   934
489c9b5090e2 Initial load
duke
parents:
diff changeset
   935
    instanceHandle h(cur_thread, (instanceOop) jt->threadObj());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   936
    _threads_array->append(h);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   937
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   938
}