Mercurial > hg > truffle
view src/os/linux/vm/globals_linux.hpp @ 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 | 139667d9836a |
children | 188c9a5d6a6d |
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/* * Copyright (c) 2005, 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. * */ #ifndef OS_LINUX_VM_GLOBALS_LINUX_HPP #define OS_LINUX_VM_GLOBALS_LINUX_HPP // // Defines Linux specific flags. They are not available on other platforms. // #define RUNTIME_OS_FLAGS(develop, develop_pd, product, product_pd, diagnostic, notproduct) \ product(bool, UseOprofile, false, \ "enable support for Oprofile profiler") \ \ product(bool, UseLinuxPosixThreadCPUClocks, true, \ "enable fast Linux Posix clocks where available") \ /* NB: The default value of UseLinuxPosixThreadCPUClocks may be \ overridden in Arguments::parse_each_vm_init_arg. */ \ \ product(bool, UseHugeTLBFS, false, \ "Use MAP_HUGETLB for large pages") \ \ product(bool, UseSHM, false, \ "Use SYSV shared memory for large pages") // // Defines Linux-specific default values. The flags are available on all // platforms, but they may have different default values on other platforms. // define_pd_global(bool, UseLargePages, false); define_pd_global(bool, UseLargePagesIndividualAllocation, false); define_pd_global(bool, UseOSErrorReporting, false); define_pd_global(bool, UseThreadPriorities, true) ; #endif // OS_LINUX_VM_GLOBALS_LINUX_HPP