Mercurial > hg > graal-jvmci-8
view src/share/vm/runtime/task.cpp @ 7588:f9eb431c3efe
8006005: Fix constant pool index validation and alignment trap for method parameter reflection
Summary: This patch addresses an alignment trap due to the storage format of method parameters data in constMethod. It also adds code to validate constant pool indexes for method parameters data.
Reviewed-by: jrose, dholmes
Contributed-by: eric.mccorkle@oracle.com
author | coleenp |
---|---|
date | Mon, 14 Jan 2013 11:01:39 -0500 |
parents | f34d701e952e |
children | f2110083203d |
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/* * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #include "precompiled.hpp" #include "memory/allocation.hpp" #include "runtime/init.hpp" #include "runtime/task.hpp" #include "runtime/thread.inline.hpp" #include "runtime/timer.hpp" #ifdef TARGET_OS_FAMILY_linux # include "os_linux.inline.hpp" #endif #ifdef TARGET_OS_FAMILY_solaris # include "os_solaris.inline.hpp" #endif #ifdef TARGET_OS_FAMILY_windows # include "os_windows.inline.hpp" #endif #ifdef TARGET_OS_FAMILY_bsd # include "os_bsd.inline.hpp" #endif int PeriodicTask::_num_tasks = 0; PeriodicTask* PeriodicTask::_tasks[PeriodicTask::max_tasks]; #ifndef PRODUCT elapsedTimer PeriodicTask::_timer; int PeriodicTask::_intervalHistogram[PeriodicTask::max_interval]; int PeriodicTask::_ticks; void PeriodicTask::print_intervals() { if (ProfilerCheckIntervals) { for (int i = 0; i < PeriodicTask::max_interval; i++) { int n = _intervalHistogram[i]; if (n > 0) tty->print_cr("%3d: %5d (%4.1f%%)", i, n, 100.0 * n / _ticks); } } } #endif void PeriodicTask::real_time_tick(int delay_time) { #ifndef PRODUCT if (ProfilerCheckIntervals) { _ticks++; _timer.stop(); int ms = (int)(_timer.seconds() * 1000.0); _timer.reset(); _timer.start(); if (ms >= PeriodicTask::max_interval) ms = PeriodicTask::max_interval - 1; _intervalHistogram[ms]++; } #endif { MutexLockerEx ml(PeriodicTask_lock, Mutex::_no_safepoint_check_flag); int orig_num_tasks = _num_tasks; for(int index = 0; index < _num_tasks; index++) { _tasks[index]->execute_if_pending(delay_time); if (_num_tasks < orig_num_tasks) { // task dis-enrolled itself index--; // re-do current slot as it has changed orig_num_tasks = _num_tasks; } } } } int PeriodicTask::time_to_wait() { MutexLockerEx ml(PeriodicTask_lock->owned_by_self() ? NULL : PeriodicTask_lock, Mutex::_no_safepoint_check_flag); if (_num_tasks == 0) { return 0; // sleep until shutdown or a task is enrolled } int delay = _tasks[0]->time_to_next_interval(); for (int index = 1; index < _num_tasks; index++) { delay = MIN2(delay, _tasks[index]->time_to_next_interval()); } return delay; } PeriodicTask::PeriodicTask(size_t interval_time) : _counter(0), _interval((int) interval_time) { // Sanity check the interval time assert(_interval >= PeriodicTask::min_interval && _interval <= PeriodicTask::max_interval && _interval % PeriodicTask::interval_gran == 0, "improper PeriodicTask interval time"); } PeriodicTask::~PeriodicTask() { disenroll(); } void PeriodicTask::enroll() { MutexLockerEx ml(PeriodicTask_lock->owned_by_self() ? NULL : PeriodicTask_lock, Mutex::_no_safepoint_check_flag); if (_num_tasks == PeriodicTask::max_tasks) { fatal("Overflow in PeriodicTask table"); } _tasks[_num_tasks++] = this; WatcherThread* thread = WatcherThread::watcher_thread(); if (thread) { thread->unpark(); } else { WatcherThread::start(); } } void PeriodicTask::disenroll() { MutexLockerEx ml(PeriodicTask_lock->owned_by_self() ? NULL : PeriodicTask_lock, Mutex::_no_safepoint_check_flag); int index; for(index = 0; index < _num_tasks && _tasks[index] != this; index++) ; if (index == _num_tasks) { return; } _num_tasks--; for (; index < _num_tasks; index++) { _tasks[index] = _tasks[index+1]; } }