/thirdparty/breakpad/common/dwarf_line_to_module.cc
http://github.com/tomahawk-player/tomahawk · C++ · 135 lines · 71 code · 17 blank · 47 comment · 26 complexity · 58eca34febcf1ba2b10475eac1014591 MD5 · raw file
- // Copyright (c) 2010 Google Inc.
- // All rights reserved.
- //
- // Redistribution and use in source and binary forms, with or without
- // modification, are permitted provided that the following conditions are
- // met:
- //
- // * Redistributions of source code must retain the above copyright
- // notice, this list of conditions and the following disclaimer.
- // * Redistributions in binary form must reproduce the above
- // copyright notice, this list of conditions and the following disclaimer
- // in the documentation and/or other materials provided with the
- // distribution.
- // * Neither the name of Google Inc. nor the names of its
- // contributors may be used to endorse or promote products derived from
- // this software without specific prior written permission.
- //
- // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- // Original author: Jim Blandy <jimb@mozilla.com> <jimb@red-bean.com>
- // dwarf_line_to_module.cc: Implementation of DwarfLineToModule class.
- // See dwarf_line_to_module.h for details.
- #include "common/dwarf_line_to_module.h"
- #include <stdio.h>
- // Trying to support Windows paths in a reasonable way adds a lot of
- // variations to test; it would be better to just put off dealing with
- // it until we actually have to deal with DWARF on Windows.
- // Return true if PATH is an absolute path, false if it is relative.
- static bool PathIsAbsolute(const std::string &path) {
- return (path.size() >= 1 && path[0] == '/');
- }
- // If PATH is an absolute path, return PATH. If PATH is a relative path,
- // treat it as relative to BASE and return the combined path.
- static std::string ExpandPath(const std::string &path,
- const std::string &base) {
- if (PathIsAbsolute(path))
- return path;
- return base + "/" + path;
- }
- namespace google_breakpad {
- void DwarfLineToModule::DefineDir(const std::string &name, uint32 dir_num) {
- // Directory number zero is reserved to mean the compilation
- // directory. Silently ignore attempts to redefine it.
- if (dir_num != 0)
- directories_[dir_num] = name;
- }
- void DwarfLineToModule::DefineFile(const std::string &name, int32 file_num,
- uint32 dir_num, uint64 mod_time,
- uint64 length) {
- if (file_num == -1)
- file_num = ++highest_file_number_;
- else if (file_num > highest_file_number_)
- highest_file_number_ = file_num;
- std::string full_name;
- if (dir_num != 0) {
- DirectoryTable::const_iterator directory_it = directories_.find(dir_num);
- if (directory_it != directories_.end()) {
- full_name = ExpandPath(name, directory_it->second);
- } else {
- if (!warned_bad_directory_number_) {
- fprintf(stderr, "warning: DWARF line number data refers to undefined"
- " directory numbers\n");
- warned_bad_directory_number_ = true;
- }
- full_name = name; // just treat name as relative
- }
- } else {
- // Directory number zero is the compilation directory; we just report
- // relative paths in that case.
- full_name = name;
- }
- // Find a Module::File object of the given name, and add it to the
- // file table.
- files_[file_num] = module_->FindFile(full_name);
- }
- void DwarfLineToModule::AddLine(uint64 address, uint64 length,
- uint32 file_num, uint32 line_num,
- uint32 column_num) {
- if (length == 0)
- return;
- // Clip lines not to extend beyond the end of the address space.
- if (address + length < address)
- length = -address;
- // Should we omit this line? (See the comments for omitted_line_end_.)
- if (address == 0 || address == omitted_line_end_) {
- omitted_line_end_ = address + length;
- return;
- } else {
- omitted_line_end_ = 0;
- }
- // Find the source file being referred to.
- Module::File *file = files_[file_num];
- if (!file) {
- if (!warned_bad_file_number_) {
- fprintf(stderr, "warning: DWARF line number data refers to "
- "undefined file numbers\n");
- warned_bad_file_number_ = true;
- }
- return;
- }
- Module::Line line;
- line.address = address;
- // We set the size when we get the next line or the EndSequence call.
- line.size = length;
- line.file = file;
- line.number = line_num;
- lines_->push_back(line);
- }
- } // namespace google_breakpad