Mercurial > hg > truffle
view src/os/linux/vm/osThread_linux.cpp @ 3293:1f4413413144
7039089: G1: changeset for 7037276 broke heap verification, and related cleanups
Summary: In G1 heap verification, we no longer scan perm to G1-collected heap refs as part of process_strong_roots() but rather in a separate explicit oop iteration over the perm gen. This preserves the original perm card-marks. Added a new assertion in younger_refs_iterate() to catch a simple subcase where the user may have forgotten a prior save_marks() call, as happened in the case of G1's attempt to iterate perm to G1 refs when verifying the heap before exit. The assert was deliberately weakened for ParNew+CMS and will be fixed for that combination in a future CR. Also made some (non-G1) cleanups related to code and comments obsoleted by the migration of Symbols to the native heap.
Reviewed-by: iveresov, jmasa, tonyp
author | ysr |
---|---|
date | Tue, 26 Apr 2011 21:17:24 -0700 |
parents | 1d1603768966 |
children | cd3d6a6b95d9 |
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/* * Copyright (c) 1999, 2011, 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. * */ // no precompiled headers #include "runtime/atomic.hpp" #include "runtime/handles.inline.hpp" #include "runtime/mutexLocker.hpp" #include "runtime/os.hpp" #include "runtime/osThread.hpp" #include "runtime/safepoint.hpp" #include "runtime/vmThread.hpp" #ifdef TARGET_ARCH_x86 # include "assembler_x86.inline.hpp" #endif #ifdef TARGET_ARCH_sparc # include "assembler_sparc.inline.hpp" #endif #ifdef TARGET_ARCH_zero # include "assembler_zero.inline.hpp" #endif #ifdef TARGET_ARCH_arm # include "assembler_arm.inline.hpp" #endif #ifdef TARGET_ARCH_ppc # include "assembler_ppc.inline.hpp" #endif void OSThread::pd_initialize() { assert(this != NULL, "check"); _thread_id = 0; _pthread_id = 0; _siginfo = NULL; _ucontext = NULL; _expanding_stack = 0; _alt_sig_stack = NULL; sigemptyset(&_caller_sigmask); _startThread_lock = new Monitor(Mutex::event, "startThread_lock", true); assert(_startThread_lock !=NULL, "check"); } void OSThread::pd_destroy() { delete _startThread_lock; }