Mercurial > hg > graal-compiler
diff src/share/vm/utilities/elfFile.hpp @ 2022:2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
Summary: Implemented in-process C native stack frame decoding when symbols are available.
Reviewed-by: coleenp, never
author | zgu |
---|---|
date | Sat, 11 Dec 2010 13:20:56 -0500 |
parents | |
children | f08d439fab8c |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/vm/utilities/elfFile.hpp Sat Dec 11 13:20:56 2010 -0500 @@ -0,0 +1,140 @@ +/* + * 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_FILE_HPP +#define __ELF_FILE_HPP + +#ifndef _WINDOWS + +#include <elf.h> +#include <stdio.h> + +#ifdef _LP64 + +typedef Elf64_Half Elf_Half; +typedef Elf64_Word Elf_Word; +typedef Elf64_Off Elf_Off; +typedef Elf64_Addr Elf_Addr; + +typedef Elf64_Ehdr Elf_Ehdr; +typedef Elf64_Shdr Elf_Shdr; +typedef Elf64_Sym Elf_Sym; + +#define ELF_ST_TYPE ELF64_ST_TYPE + +#else + +typedef Elf32_Half Elf_Half; +typedef Elf32_Word Elf_Word; +typedef Elf32_Off Elf_Off; +typedef Elf32_Addr Elf_Addr; + + +typedef Elf32_Ehdr Elf_Ehdr; +typedef Elf32_Shdr Elf_Shdr; +typedef Elf32_Sym Elf_Sym; + +#define ELF_ST_TYPE ELF32_ST_TYPE +#endif + +#include "globalDefinitions.hpp" +#include "memory/allocation.hpp" +#include "utilities/decoder.hpp" + + +class ElfStringTable; +class ElfSymbolTable; + + +// On Solaris/Linux platforms, libjvm.so does contain all private symbols. +// ElfFile is basically an elf file parser, which can lookup the symbol +// that is the nearest to the given address. +// Beware, this code is called from vm error reporting code, when vm is already +// in "error" state, so there are scenarios, lookup will fail. We want this +// part of code to be very defensive, and bait out if anything went wrong. + +class ElfFile: public CHeapObj { + friend class Decoder; + public: + ElfFile(const char* filepath); + ~ElfFile(); + + const char* decode(address addr, int* offset); + const char* filepath() { + return m_filepath; + } + + bool same_elf_file(const char* filepath) { + assert(filepath, "null file path"); + assert(m_filepath, "already out of memory"); + return (m_filepath && !strcmp(filepath, m_filepath)); + } + + Decoder::decoder_status get_status() { + return m_status; + } + + private: + // sanity check, if the file is a real elf file + bool is_elf_file(Elf_Ehdr&); + + // load string tables from the elf file + bool load_tables(); + + // string tables are stored in a linked list + void add_string_table(ElfStringTable* table); + + // symbol tables are stored in a linked list + void add_symbol_table(ElfSymbolTable* table); + + // return a string table at specified section index + ElfStringTable* get_string_table(int index); + + // look up an address and return the nearest symbol + const char* look_up(Elf_Shdr shdr, address addr, int* offset); + + protected: + ElfFile* m_next; + + private: + // file + const char* m_filepath; + FILE* m_file; + + // Elf header + Elf_Ehdr m_elfHdr; + + // symbol tables + ElfSymbolTable* m_symbol_tables; + + // string tables + ElfStringTable* m_string_tables; + + Decoder::decoder_status m_status; +}; + +#endif // _WINDOWS + +#endif // __ELF_FILE_HPP +