1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/utilities/elfFile.hpp Wed Apr 27 01:25:04 2016 +0800
1.3 @@ -0,0 +1,162 @@
1.4 +/*
1.5 + * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + *
1.26 + */
1.27 +
1.28 +#ifndef SHARE_VM_UTILITIES_ELF_FILE_HPP
1.29 +#define SHARE_VM_UTILITIES_ELF_FILE_HPP
1.30 +
1.31 +#if !defined(_WINDOWS) && !defined(__APPLE__)
1.32 +
1.33 +#if defined(__OpenBSD__)
1.34 +#include <sys/exec_elf.h>
1.35 +#else
1.36 +#include <elf.h>
1.37 +#endif
1.38 +#include <stdio.h>
1.39 +
1.40 +#ifdef _LP64
1.41 +
1.42 +typedef Elf64_Half Elf_Half;
1.43 +typedef Elf64_Word Elf_Word;
1.44 +typedef Elf64_Off Elf_Off;
1.45 +typedef Elf64_Addr Elf_Addr;
1.46 +
1.47 +typedef Elf64_Ehdr Elf_Ehdr;
1.48 +typedef Elf64_Shdr Elf_Shdr;
1.49 +typedef Elf64_Phdr Elf_Phdr;
1.50 +typedef Elf64_Sym Elf_Sym;
1.51 +
1.52 +#if !defined(_ALLBSD_SOURCE) || defined(__APPLE__)
1.53 +#define ELF_ST_TYPE ELF64_ST_TYPE
1.54 +#endif
1.55 +
1.56 +#else
1.57 +
1.58 +typedef Elf32_Half Elf_Half;
1.59 +typedef Elf32_Word Elf_Word;
1.60 +typedef Elf32_Off Elf_Off;
1.61 +typedef Elf32_Addr Elf_Addr;
1.62 +
1.63 +
1.64 +typedef Elf32_Ehdr Elf_Ehdr;
1.65 +typedef Elf32_Shdr Elf_Shdr;
1.66 +typedef Elf32_Phdr Elf_Phdr;
1.67 +typedef Elf32_Sym Elf_Sym;
1.68 +
1.69 +#if !defined(_ALLBSD_SOURCE) || defined(__APPLE__)
1.70 +#define ELF_ST_TYPE ELF32_ST_TYPE
1.71 +#endif
1.72 +#endif
1.73 +
1.74 +#include "globalDefinitions.hpp"
1.75 +#include "memory/allocation.hpp"
1.76 +#include "utilities/decoder.hpp"
1.77 +
1.78 +
1.79 +class ElfStringTable;
1.80 +class ElfSymbolTable;
1.81 +class ElfFuncDescTable;
1.82 +
1.83 +
1.84 +// On Solaris/Linux platforms, libjvm.so does contain all private symbols.
1.85 +// ElfFile is basically an elf file parser, which can lookup the symbol
1.86 +// that is the nearest to the given address.
1.87 +// Beware, this code is called from vm error reporting code, when vm is already
1.88 +// in "error" state, so there are scenarios, lookup will fail. We want this
1.89 +// part of code to be very defensive, and bait out if anything went wrong.
1.90 +
1.91 +class ElfFile: public CHeapObj<mtInternal> {
1.92 + friend class ElfDecoder;
1.93 + public:
1.94 + ElfFile(const char* filepath);
1.95 + ~ElfFile();
1.96 +
1.97 + bool decode(address addr, char* buf, int buflen, int* offset);
1.98 + const char* filepath() {
1.99 + return m_filepath;
1.100 + }
1.101 +
1.102 + bool same_elf_file(const char* filepath) {
1.103 + assert(filepath, "null file path");
1.104 + assert(m_filepath, "already out of memory");
1.105 + return (m_filepath && !strcmp(filepath, m_filepath));
1.106 + }
1.107 +
1.108 + NullDecoder::decoder_status get_status() {
1.109 + return m_status;
1.110 + }
1.111 +
1.112 + private:
1.113 + // sanity check, if the file is a real elf file
1.114 + bool is_elf_file(Elf_Ehdr&);
1.115 +
1.116 + // load string tables from the elf file
1.117 + bool load_tables();
1.118 +
1.119 + // string tables are stored in a linked list
1.120 + void add_string_table(ElfStringTable* table);
1.121 +
1.122 + // symbol tables are stored in a linked list
1.123 + void add_symbol_table(ElfSymbolTable* table);
1.124 +
1.125 + // return a string table at specified section index
1.126 + ElfStringTable* get_string_table(int index);
1.127 +
1.128 +protected:
1.129 + ElfFile* next() const { return m_next; }
1.130 + void set_next(ElfFile* file) { m_next = file; }
1.131 +
1.132 + public:
1.133 + // Returns true if the elf file is marked NOT to require an executable stack,
1.134 + // or if the file could not be opened.
1.135 + // Returns false if the elf file requires an executable stack, the stack flag
1.136 + // is not set at all, or if the file can not be read.
1.137 + // On systems other than linux it always returns false.
1.138 + bool specifies_noexecstack() NOT_LINUX({ return false; });
1.139 +
1.140 + protected:
1.141 + ElfFile* m_next;
1.142 +
1.143 + private:
1.144 + // file
1.145 + const char* m_filepath;
1.146 + FILE* m_file;
1.147 +
1.148 + // Elf header
1.149 + Elf_Ehdr m_elfHdr;
1.150 +
1.151 + // symbol tables
1.152 + ElfSymbolTable* m_symbol_tables;
1.153 +
1.154 + // string tables
1.155 + ElfStringTable* m_string_tables;
1.156 +
1.157 + // function descriptors table
1.158 + ElfFuncDescTable* m_funcDesc_table;
1.159 +
1.160 + NullDecoder::decoder_status m_status;
1.161 +};
1.162 +
1.163 +#endif // !_WINDOWS && !__APPLE__
1.164 +
1.165 +#endif // SHARE_VM_UTILITIES_ELF_FILE_HPP
