jdk8-mips64-public/hotspot: src/share/vm/utilities/elfSymbolTable.cpp@752ba2e5f6d0 (annotated)

src/share/vm/utilities/elfSymbolTable.cpp@752ba2e5f6d0 (annotated)

src/share/vm/utilities/elfSymbolTable.cpp

Tue, 25 Feb 2014 15:11:18 -0800

author: kvn
date: Tue, 25 Feb 2014 15:11:18 -0800
changeset 6507: 752ba2e5f6d0
parent 6491: e7cbc95179c4
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.
  *
  */
 #include "precompiled.hpp"
 #if !defined(_WINDOWS) && !defined(__APPLE__)
 #include "memory/allocation.inline.hpp"
 #include "utilities/elfFuncDescTable.hpp"
 #include "utilities/elfSymbolTable.hpp"
 ElfSymbolTable::ElfSymbolTable(FILE* file, Elf_Shdr shdr) {
   assert(file, "null file handle");
   m_symbols = NULL;
   m_next = NULL;
   m_file = file;
   m_status = NullDecoder::no_error;
   // try to load the string table
   long cur_offset = ftell(file);
   if (cur_offset != -1) {
     // call malloc so we can back up if memory allocation fails.
     m_symbols = (Elf_Sym*)os::malloc(shdr.sh_size, mtInternal);
     if (m_symbols) {
       if (fseek(file, shdr.sh_offset, SEEK_SET) ||
         fread((void*)m_symbols, shdr.sh_size, 1, file) != 1 ||
         fseek(file, cur_offset, SEEK_SET)) {
         m_status = NullDecoder::file_invalid;
         os::free(m_symbols);
         m_symbols = NULL;
       }
     }
     if (!NullDecoder::is_error(m_status)) {
       memcpy(&m_shdr, &shdr, sizeof(Elf_Shdr));
     }
   } else {
     m_status = NullDecoder::file_invalid;
   }
 }
 ElfSymbolTable::~ElfSymbolTable() {
   if (m_symbols != NULL) {
     os::free(m_symbols);
   }
   if (m_next != NULL) {
     delete m_next;
   }
 }
 bool ElfSymbolTable::lookup(address addr, int* stringtableIndex, int* posIndex, int* offset, ElfFuncDescTable* funcDescTable) {
   assert(stringtableIndex, "null string table index pointer");
   assert(posIndex, "null string table offset pointer");
   assert(offset, "null offset pointer");
   if (NullDecoder::is_error(m_status)) {
     return false;
   }
   size_t  sym_size = sizeof(Elf_Sym);
   assert((m_shdr.sh_size % sym_size) == 0, "check size");
   int count = m_shdr.sh_size / sym_size;
   if (m_symbols != NULL) {
     for (int index = 0; index < count; index ++) {
       if (STT_FUNC == ELF_ST_TYPE(m_symbols[index].st_info)) {
         Elf_Word st_size = m_symbols[index].st_size;
         address sym_addr;
         if (funcDescTable != NULL && funcDescTable->get_index() == m_symbols[index].st_shndx) {
           // We need to go another step trough the function descriptor table (currently PPC64 only)
           sym_addr = funcDescTable->lookup(m_symbols[index].st_value);
         } else {
           sym_addr = (address)m_symbols[index].st_value;
         }
         if (sym_addr <= addr && (Elf_Word)(addr - sym_addr) < st_size) {
           *offset = (int)(addr - sym_addr);
           *posIndex = m_symbols[index].st_name;
           *stringtableIndex = m_shdr.sh_link;
           return true;
         }
       }
     }
   } else {
     long cur_pos;
     if ((cur_pos = ftell(m_file)) == -1 ||
       fseek(m_file, m_shdr.sh_offset, SEEK_SET)) {
       m_status = NullDecoder::file_invalid;
       return false;
     }
     Elf_Sym sym;
     for (int index = 0; index < count; index ++) {
       if (fread(&sym, sym_size, 1, m_file) == 1) {
         if (STT_FUNC == ELF_ST_TYPE(sym.st_info)) {
           Elf_Word st_size = sym.st_size;
           address sym_addr;
           if (funcDescTable != NULL && funcDescTable->get_index() == sym.st_shndx) {
             // We need to go another step trough the function descriptor table (currently PPC64 only)
             sym_addr = funcDescTable->lookup(sym.st_value);
           } else {
             sym_addr = (address)sym.st_value;
           }
           if (sym_addr <= addr && (Elf_Word)(addr - sym_addr) < st_size) {
             *offset = (int)(addr - sym_addr);
             *posIndex = sym.st_name;
             *stringtableIndex = m_shdr.sh_link;
             return true;
           }
         }
       } else {
         m_status = NullDecoder::file_invalid;
         return false;
       }
     }
     fseek(m_file, cur_pos, SEEK_SET);
   }
   return true;
 }
 #endif // !_WINDOWS && !__APPLE__

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/utilities/elfSymbolTable.cpp@752ba2e5f6d0 (annotated)

src/share/vm/utilities/elfSymbolTable.cpp