Mercurial > hg > graal-compiler
view src/share/vm/utilities/elfStringTable.hpp @ 2149:7e37af9d69ef
7011379: G1: overly long concurrent marking cycles
Summary: This changeset introduces filtering of SATB buffers at the point when they are about to be enqueued. If this filtering clears enough entries on each buffer, the buffer can then be re-used and not enqueued. This cuts down the number of SATB buffers that need to be processed by the concurrent marking threads.
Reviewed-by: johnc, ysr
author | tonyp |
---|---|
date | Wed, 19 Jan 2011 09:35:17 -0500 |
parents | 2d4762ec74af |
children | f08d439fab8c |
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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. * */ #ifndef __ELF_STRING_TABLE_HPP #define __ELF_STRING_TABLE_HPP #ifndef _WINDOWS #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. #define MAX_SYMBOL_LEN 256 class ElfStringTable: CHeapObj { 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 const char* string_at(int offset); // get status code Decoder::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; // buffer for reading individual string char m_symbol[MAX_SYMBOL_LEN]; // error code Decoder::decoder_status m_status; }; #endif // _WINDOWS #endif // __ELF_STRING_TABLE_HPP