jdk8-mips64-public/hotspot: src/share/vm/utilities/elfFile.hpp@a9becfeecd1b (annotated)

src/share/vm/utilities/elfFile.hpp@a9becfeecd1b (annotated)

src/share/vm/utilities/elfFile.hpp

Wed, 22 Jan 2014 17:42:23 -0800

author: kvn
date: Wed, 22 Jan 2014 17:42:23 -0800
changeset 6503: a9becfeecd1b
parent 6491: e7cbc95179c4
parent 6198: 55fb97c4c58d
child 6876: 710a3c8b516e
permissions: -rw-r--r--

Merge

 /*
  * Copyright (c) 1997, 2013, 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 SHARE_VM_UTILITIES_ELF_FILE_HPP
 #define SHARE_VM_UTILITIES_ELF_FILE_HPP
 #if !defined(_WINDOWS) && !defined(__APPLE__)
 #if defined(__OpenBSD__)
 #include <sys/exec_elf.h>
 #else
 #include <elf.h>
 #endif
 #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_Phdr      Elf_Phdr;
 typedef Elf64_Sym       Elf_Sym;
 #if !defined(_ALLBSD_SOURCE) || defined(__APPLE__)
 #define ELF_ST_TYPE ELF64_ST_TYPE
 #endif
 #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_Phdr      Elf_Phdr;
 typedef Elf32_Sym       Elf_Sym;
 #if !defined(_ALLBSD_SOURCE) || defined(__APPLE__)
 #define ELF_ST_TYPE ELF32_ST_TYPE
 #endif
 #endif
 #include "globalDefinitions.hpp"
 #include "memory/allocation.hpp"
 #include "utilities/decoder.hpp"
 class ElfStringTable;
 class ElfSymbolTable;
 class ElfFuncDescTable;
 // 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<mtInternal> {
   friend class ElfDecoder;
  public:
   ElfFile(const char* filepath);
   ~ElfFile();
   bool decode(address addr, char* buf, int buflen, 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));
   }
   NullDecoder::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);
 protected:
    ElfFile*  next() const { return m_next; }
    void set_next(ElfFile* file) { m_next = file; }
  public:
   // Returns true if the elf file is marked NOT to require an executable stack,
   // or if the file could not be opened.
   // Returns false if the elf file requires an executable stack, the stack flag
   // is not set at all, or if the file can not be read.
   // On systems other than linux it always returns false.
   bool specifies_noexecstack() NOT_LINUX({ return false; });
  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;
   // function descriptors table
   ElfFuncDescTable*            m_funcDesc_table;
   NullDecoder::decoder_status  m_status;
 };
 #endif // !_WINDOWS && !__APPLE__
 #endif // SHARE_VM_UTILITIES_ELF_FILE_HPP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/utilities/elfFile.hpp@a9becfeecd1b (annotated)

src/share/vm/utilities/elfFile.hpp