1 /*

     2  * Copyright (c) 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  */

    24 

    25 #include "precompiled.hpp"

    26 

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

    28 #include "decoder_elf.hpp"

    29 

    30 ElfDecoder::~ElfDecoder() {

    31   if (_opened_elf_files != NULL) {

    32     delete _opened_elf_files;

    33     _opened_elf_files = NULL;

    34   }

    35 }

    36 

    37 bool ElfDecoder::decode(address addr, char *buf, int buflen, int* offset, const char* filepath) {

    38   assert(filepath, "null file path");

    39   assert(buf != NULL && buflen > 0, "Invalid buffer");

    40   if (has_error()) return false;

    41   ElfFile* file = get_elf_file(filepath);

    42   if (file == NULL) {

    43     return false;

    44   }

    45 

    46   if (!file->decode(addr, buf, buflen, offset)) {

    47     return false;

    48   }

    49   if (buf[0] != '\0') {

    50     demangle(buf, buf, buflen);

    51   }

    52   return true;

    53 }

    54 

    55 ElfFile* ElfDecoder::get_elf_file(const char* filepath) {

    56   ElfFile* file;

    57 

    58   file = _opened_elf_files;

    59   while (file != NULL) {

    60     if (file->same_elf_file(filepath)) {

    61       return file;

    62     }

    63     file = file->next();

    64   }

    65 

    66   file = new (std::nothrow)ElfFile(filepath);

    67   if (file != NULL) {

    68     if (_opened_elf_files != NULL) {

    69       file->set_next(_opened_elf_files);

    70     }

    71     _opened_elf_files = file;

    72   }

    73 

    74   return file;

    75 }

    76 #endif