jdk8-mips64-public/hotspot: src/share/vm/utilities/elfSymbolTable.cpp@246d977b51f2

7178670: runtime/7158800/BadUtf8.java fails in SymbolTable::rehash_table
Summary: Cannot delete _buckets and HashtableEntries in shared space (CDS)
Reviewed-by: acorn, kvn, dlong, dcubed, kamg

     1 /*

     2  * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  *

    23  */

    25 #include "precompiled.hpp"

    27 #if !defined(_WINDOWS) && !defined(__APPLE__)

    29 #include "memory/allocation.inline.hpp"

    30 #include "utilities/elfSymbolTable.hpp"

    32 ElfSymbolTable::ElfSymbolTable(FILE* file, Elf_Shdr shdr) {

    33   assert(file, "null file handle");

    34   m_symbols = NULL;

    35   m_next = NULL;

    36   m_file = file;

    37   m_status = NullDecoder::no_error;

    39   // try to load the string table

    40   long cur_offset = ftell(file);

    41   if (cur_offset != -1) {

    42     // call malloc so we can back up if memory allocation fails.

    43     m_symbols = (Elf_Sym*)os::malloc(shdr.sh_size);

    44     if (m_symbols) {

    45       if (fseek(file, shdr.sh_offset, SEEK_SET) ||

    46         fread((void*)m_symbols, shdr.sh_size, 1, file) != 1 ||

    47         fseek(file, cur_offset, SEEK_SET)) {

    48         m_status = NullDecoder::file_invalid;

    49         os::free(m_symbols);

    50         m_symbols = NULL;

    51       }

    52     }

    53     if (!NullDecoder::is_error(m_status)) {

    54       memcpy(&m_shdr, &shdr, sizeof(Elf_Shdr));

    55     }

    56   } else {

    57     m_status = NullDecoder::file_invalid;

    58   }

    59 }

    61 ElfSymbolTable::~ElfSymbolTable() {

    62   if (m_symbols != NULL) {

    63     os::free(m_symbols);

    64   }

    66   if (m_next != NULL) {

    67     delete m_next;

    68   }

    69 }

    71 bool ElfSymbolTable::lookup(address addr, int* stringtableIndex, int* posIndex, int* offset) {

    72   assert(stringtableIndex, "null string table index pointer");

    73   assert(posIndex, "null string table offset pointer");

    74   assert(offset, "null offset pointer");

    76   if (NullDecoder::is_error(m_status)) {

    77     return false;

    78   }

    80   address pc = 0;

    81   size_t  sym_size = sizeof(Elf_Sym);

    82   assert((m_shdr.sh_size % sym_size) == 0, "check size");

    83   int count = m_shdr.sh_size / sym_size;

    84   if (m_symbols != NULL) {

    85     for (int index = 0; index < count; index ++) {

    86       if (STT_FUNC == ELF_ST_TYPE(m_symbols[index].st_info)) {

    87         address sym_addr = (address)m_symbols[index].st_value;

    88         if (sym_addr < addr && (addr - sym_addr) < *offset) {

    89           pc = (address)m_symbols[index].st_value;

    90           *offset = (int)(addr - pc);

    91           *posIndex = m_symbols[index].st_name;

    92           *stringtableIndex = m_shdr.sh_link;

    93         }

    94       }

    95     }

    96   } else {

    97     long cur_pos;

    98     if ((cur_pos = ftell(m_file)) == -1 ||

    99       fseek(m_file, m_shdr.sh_offset, SEEK_SET)) {

   100       m_status = NullDecoder::file_invalid;

   101       return false;

   102     }

   104     Elf_Sym sym;

   105     for (int index = 0; index < count; index ++) {

   106       if (fread(&sym, sym_size, 1, m_file) == 1) {

   107         if (STT_FUNC == ELF_ST_TYPE(sym.st_info)) {

   108           address sym_addr = (address)sym.st_value;

   109           if (sym_addr < addr && (addr - sym_addr) < *offset) {

   110             pc = (address)sym.st_value;

   111             *offset = (int)(addr - pc);

   112             *posIndex = sym.st_name;

   113             *stringtableIndex = m_shdr.sh_link;

   114           }

   115         }

   116       } else {

   117         m_status = NullDecoder::file_invalid;

   118         return false;

   119       }

   120     }

   121     fseek(m_file, cur_pos, SEEK_SET);

   122   }

   123   return true;

   124 }

   126 #endif // _WINDOWS

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

src/share/vm/utilities/elfSymbolTable.cpp@246d977b51f2

src/share/vm/utilities/elfSymbolTable.cpp