Mercurial > jdk8-mips64-public > hotspot / file revision

 /*

  * 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