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| 1 // Copyright (c) 2010 Google Inc. | |
| 2 // All rights reserved. | |
| 3 // | |
| 4 // Redistribution and use in source and binary forms, with or without | |
| 5 // modification, are permitted provided that the following conditions are | |
| 6 // met: | |
| 7 // | |
| 8 // * Redistributions of source code must retain the above copyright | |
| 9 // notice, this list of conditions and the following disclaimer. | |
| 10 // * Redistributions in binary form must reproduce the above | |
| 11 // copyright notice, this list of conditions and the following disclaimer | |
| 12 // in the documentation and/or other materials provided with the | |
| 13 // distribution. | |
| 14 // * Neither the name of Google Inc. nor the names of its | |
| 15 // contributors may be used to endorse or promote products derived from | |
| 16 // this software without specific prior written permission. | |
| 17 // | |
| 18 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| 19 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
| 20 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
| 21 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
| 22 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 23 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
| 24 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
| 25 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
| 26 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 27 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 28 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 29 | |
| 30 // Original author: Jim Blandy <jimb@mozilla.com> <jimb@red-bean.com> | |
| 31 | |
| 32 // dwarf_line_to_module.cc: Implementation of DwarfLineToModule class. | |
| 33 // See dwarf_line_to_module.h for details. | |
| 34 | |
| 35 #include "common/dwarf_line_to_module.h" | |
| 36 | |
| 37 // Trying to support Windows paths in a reasonable way adds a lot of | |
| 38 // variations to test; it would be better to just put off dealing with | |
| 39 // it until we actually have to deal with DWARF on Windows. | |
| 40 | |
| 41 // Return true if PATH is an absolute path, false if it is relative. | |
| 42 static bool PathIsAbsolute(const string &path) { | |
| 43 return (path.size() >= 1 && path[0] == '/'); | |
| 44 } | |
| 45 | |
| 46 // If PATH is an absolute path, return PATH. If PATH is a relative path, | |
| 47 // treat it as relative to BASE and return the combined path. | |
| 48 static string ExpandPath(const string &path, const string &base) { | |
| 49 if (PathIsAbsolute(path)) | |
| 50 return path; | |
| 51 return base + "/" + path; | |
| 52 } | |
| 53 | |
| 54 namespace google_breakpad { | |
| 55 | |
| 56 void DwarfLineToModule::DefineDir(const string &name, uint32 dir_num) { | |
| 57 // Directory number zero is reserved to mean the compilation | |
| 58 // directory. Silently ignore attempts to redefine it. | |
| 59 if (dir_num != 0) | |
| 60 directories_[dir_num] = name; | |
| 61 } | |
| 62 | |
| 63 void DwarfLineToModule::DefineFile(const string &name, int32 file_num, | |
| 64 uint32 dir_num, uint64 mod_time, | |
| 65 uint64 length) { | |
| 66 if (file_num == -1) | |
| 67 file_num = ++highest_file_number_; | |
| 68 else if (file_num > highest_file_number_) | |
| 69 highest_file_number_ = file_num; | |
| 70 | |
| 71 std::string full_name; | |
| 72 if (dir_num != 0) { | |
| 73 DirectoryTable::const_iterator directory_it = directories_.find(dir_num); | |
| 74 if (directory_it != directories_.end()) { | |
| 75 full_name = ExpandPath(name, directory_it->second); | |
| 76 } else { | |
| 77 if (!warned_bad_directory_number_) { | |
| 78 fprintf(stderr, "warning: DWARF line number data refers to undefined" | |
| 79 " directory numbers\n"); | |
| 80 warned_bad_directory_number_ = true; | |
| 81 } | |
| 82 full_name = name; // just treat name as relative | |
| 83 } | |
| 84 } else { | |
| 85 // Directory number zero is the compilation directory; we just report | |
| 86 // relative paths in that case. | |
| 87 full_name = name; | |
| 88 } | |
| 89 | |
| 90 // Find a Module::File object of the given name, and add it to the | |
| 91 // file table. | |
| 92 files_[file_num] = module_->FindFile(full_name); | |
| 93 } | |
| 94 | |
| 95 void DwarfLineToModule::AddLine(uint64 address, uint64 length, | |
| 96 uint32 file_num, uint32 line_num, | |
| 97 uint32 column_num) { | |
| 98 if (length == 0) | |
| 99 return; | |
| 100 | |
| 101 // Clip lines not to extend beyond the end of the address space. | |
| 102 if (address + length < address) | |
| 103 length = -address; | |
| 104 | |
| 105 // Should we omit this line? (See the comments for omitted_line_end_.) | |
| 106 if (address == 0 || address == omitted_line_end_) { | |
| 107 omitted_line_end_ = address + length; | |
| 108 return; | |
| 109 } else { | |
| 110 omitted_line_end_ = 0; | |
| 111 } | |
| 112 | |
| 113 // Find the source file being referred to. | |
| 114 Module::File *file = files_[file_num]; | |
| 115 if (!file) { | |
| 116 if (!warned_bad_file_number_) { | |
| 117 fprintf(stderr, "warning: DWARF line number data refers to " | |
| 118 "undefined file numbers\n"); | |
| 119 warned_bad_file_number_ = true; | |
| 120 } | |
| 121 return; | |
| 122 } | |
| 123 Module::Line line; | |
| 124 line.address = address; | |
| 125 // We set the size when we get the next line or the EndSequence call. | |
| 126 line.size = length; | |
| 127 line.file = file; | |
| 128 line.number = line_num; | |
| 129 lines_->push_back(line); | |
| 130 } | |
| 131 | |
| 132 } // namespace google_breakpad | |
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Chromium Code Reviews
Issue 10928195:
First round of dead file removal (Closed)
Base URL: https://github.com/samclegg/nativeclient-sdk.git@master