133 lines
4.9 KiB
C++
133 lines
4.9 KiB
C++
// 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"
|
|
|
|
// 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 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 string ExpandPath(const string &path, const string &base) {
|
|
if (PathIsAbsolute(path))
|
|
return path;
|
|
return base + "/" + path;
|
|
}
|
|
|
|
namespace google_breakpad {
|
|
|
|
void DwarfLineToModule::DefineDir(const 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 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
|