jdk8-mips64-public/hotspot: src/share/vm/utilities/elfFile.hpp@3582bf76420e (annotated)

src/share/vm/utilities/elfFile.hpp@3582bf76420e (annotated)

src/share/vm/utilities/elfFile.hpp

Thu, 27 Jan 2011 16:11:27 -0800

author: coleenp
date: Thu, 27 Jan 2011 16:11:27 -0800
changeset 2497: 3582bf76420e
parent 2364: 2d4762ec74af
child 3156: f08d439fab8c
permissions: -rw-r--r--

6990754: Use native memory and reference counting to implement SymbolTable
Summary: move symbols from permgen into C heap and reference count them
Reviewed-by: never, acorn, jmasa, stefank

 /*
  * 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

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/utilities/elfFile.hpp@3582bf76420e (annotated)

src/share/vm/utilities/elfFile.hpp