Mercurial > hg > graal-compiler
view src/share/vm/utilities/elfStringTable.hpp @ 12110:4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
Summary: Replace the broken large pages implementation on Linux. New flag: -XX:+UseTransparentHugePages - Linux specific flag to turn on transparent huge page hinting with madvise(..., MAP_HUGETLB). Changed behavior: -XX:+UseLargePages - tries to use -XX:+UseTransparentHugePages before trying other large pages implementations (on Linux). Changed behavior: -XX:+UseHugeTLBFS - Use upfront allocation of Large Pages instead of using the broken implementation to dynamically committing large pages. Changed behavior: -XX:LargePageSizeInBytes - Turned off the ability to use this flag on Linux and provides warning to user if set to a value different than the OS chosen large page size. Changed behavior: Setting no large page size - Now defaults to use -XX:UseTransparentHugePages if the OS supports it. Previously, -XX:+UseHugeTLBFS was chosen if the OS was configured to use large pages.
Reviewed-by: tschatzl, dcubed, brutisso
author | stefank |
---|---|
date | Fri, 16 Aug 2013 13:22:32 +0200 |
parents | b9a9ed0f8eeb |
children | e7cbc95179c4 |
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/* * Copyright (c) 1997, 2012, 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 SHARE_VM_UTILITIES_ELF_STRING_TABLE_HPP #define SHARE_VM_UTILITIES_ELF_STRING_TABLE_HPP #if !defined(_WINDOWS) && !defined(__APPLE__) #include "memory/allocation.hpp" #include "utilities/decoder.hpp" #include "utilities/elfFile.hpp" // The string table represents a string table section in an elf file. // Whenever there is enough memory, it will load whole string table as // one blob. Otherwise, it will load string from file when requested. class ElfStringTable: CHeapObj<mtInternal> { friend class ElfFile; public: ElfStringTable(FILE* file, Elf_Shdr shdr, int index); ~ElfStringTable(); // section index int index() { return m_index; }; // get string at specified offset bool string_at(int offset, char* buf, int buflen); // get status code NullDecoder::decoder_status get_status() { return m_status; }; protected: ElfStringTable* m_next; // section index int m_index; // holds complete string table if can // allocate enough memory const char* m_table; // file contains string table FILE* m_file; // section header Elf_Shdr m_shdr; // error code NullDecoder::decoder_status m_status; }; #endif // _WINDOWS and _APPLE #endif // SHARE_VM_UTILITIES_ELF_STRING_TABLE_HPP