Mercurial > hg > graal-compiler
view src/share/vm/utilities/decoder_elf.cpp @ 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 |
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date | Fri, 16 Aug 2013 13:22:32 +0200 |
parents | b9a9ed0f8eeb |
children | e7cbc95179c4 |
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/* * Copyright (c) 2011, 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. * */ #include "precompiled.hpp" #if !defined(_WINDOWS) && !defined(__APPLE__) #include "decoder_elf.hpp" ElfDecoder::~ElfDecoder() { if (_opened_elf_files != NULL) { delete _opened_elf_files; _opened_elf_files = NULL; } } bool ElfDecoder::decode(address addr, char *buf, int buflen, int* offset, const char* filepath) { assert(filepath, "null file path"); assert(buf != NULL && buflen > 0, "Invalid buffer"); if (has_error()) return false; ElfFile* file = get_elf_file(filepath); if (file == NULL) { return false; } if (!file->decode(addr, buf, buflen, offset)) { return false; } if (buf[0] != '\0') { demangle(buf, buf, buflen); } return true; } ElfFile* ElfDecoder::get_elf_file(const char* filepath) { ElfFile* file; file = _opened_elf_files; while (file != NULL) { if (file->same_elf_file(filepath)) { return file; } file = file->next(); } file = new (std::nothrow)ElfFile(filepath); if (file != NULL) { if (_opened_elf_files != NULL) { file->set_next(_opened_elf_files); } _opened_elf_files = file; } return file; } #endif