1 /*
   2  * Copyright (c) 1997, 2010, 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 #include "prims/jvm.h"
  27 #include "utilities/decoder.hpp"
  28 
  29 Decoder::decoder_status  Decoder::_decoder_status = Decoder::no_error;
  30 bool                     Decoder::_initialized = false;
  31 
  32 #if !defined(_WINDOWS) && !defined(__APPLE__)
  33 
  34 // Implementation of common functionalities among Solaris and Linux
  35 #include "utilities/elfFile.hpp"
  36 
  37 ElfFile* Decoder::_opened_elf_files = NULL;
  38 
  39 bool Decoder::can_decode_C_frame_in_vm() {
  40   return true;
  41 }
  42 
  43 void Decoder::initialize() {
  44   _initialized = true;
  45 }
  46 
  47 void Decoder::uninitialize() {
  48   if (_opened_elf_files != NULL) {
  49     delete _opened_elf_files;
  50     _opened_elf_files = NULL;
  51   }
  52   _initialized = false;
  53 }
  54 
  55 Decoder::decoder_status Decoder::decode(address addr, const char* filepath, char *buf, int buflen, int *offset) {
  56   if (_decoder_status != no_error) {
  57     return _decoder_status;
  58   }
  59 
  60   ElfFile* file = get_elf_file(filepath);
  61   if (_decoder_status != no_error) {
  62     return _decoder_status;
  63   }
  64 
  65   const char* symbol = file->decode(addr, offset);
  66   if (file->get_status() == out_of_memory) {
  67     _decoder_status = out_of_memory;
  68     return _decoder_status;
  69   } else if (symbol != NULL) {
  70     if (!demangle(symbol, buf, buflen)) {
  71       jio_snprintf(buf, buflen, "%s", symbol);
  72     }
  73     return no_error;
  74   } else {
  75     return symbol_not_found;
  76   }
  77 }
  78 
  79 ElfFile* Decoder::get_elf_file(const char* filepath) {
  80   if (_decoder_status != no_error) {
  81     return NULL;
  82   }
  83   ElfFile* file = _opened_elf_files;
  84   while (file != NULL) {
  85     if (file->same_elf_file(filepath)) {
  86       return file;
  87     }
  88     file = file->m_next;
  89   }
  90 
  91   file = new ElfFile(filepath);
  92   if (file == NULL) {
  93     _decoder_status = out_of_memory;
  94   }
  95   if (_opened_elf_files != NULL) {
  96     file->m_next = _opened_elf_files;
  97   }
  98 
  99   _opened_elf_files = file;
 100   return file;
 101 }
 102 
 103 #endif