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// Copyright (c) 2009, 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.
#include <cerrno>
#include <cstring>
#include "common/linux/module.h"
namespace google_breakpad {
Module::Module(const string &name, const string &os,
const string &architecture, const string &id) :
name_(name),
os_(os),
architecture_(architecture),
id_(id),
load_address_(0) { }
Module::~Module() {
for (FileByNameMap::iterator it = files_.begin(); it != files_.end(); it++)
delete it->second;
for (vector<Function *>::iterator it = functions_.begin();
it != functions_.end(); it++)
delete *it;
}
void Module::SetLoadAddress(Address address) {
load_address_ = address;
}
void Module::AddFunction(Function *function) {
functions_.push_back(function);
}
void Module::AddFunctions(vector<Function *>::iterator begin,
vector<Function *>::iterator end) {
functions_.insert(functions_.end(), begin, end);
}
Module::File *Module::FindFile(const string &name) {
// A tricky bit here. The key of each map entry needs to be a
// pointer to the entry's File's name string. This means that we
// can't do the initial lookup with any operation that would create
// an empty entry for us if the name isn't found (like, say,
// operator[] or insert do), because such a created entry's key will
// be a pointer the string passed as our argument. Since the key of
// a map's value type is const, we can't fix it up once we've
// created our file. lower_bound does the lookup without doing an
// insertion, and returns a good hint iterator to pass to insert.
// Our "destiny" is where we belong, whether we're there or not now.
FileByNameMap::iterator destiny = files_.lower_bound(&name);
if (destiny == files_.end()
|| *destiny->first != name) { // Repeated string comparison, boo hoo.
File *file = new File;
file->name_ = name;
file->source_id_ = -1;
destiny = files_.insert(destiny,
FileByNameMap::value_type(&file->name_, file));
}
return destiny->second;
}
Module::File *Module::FindFile(const char *name) {
string name_string = name;
return FindFile(name_string);
}
void Module::AssignSourceIds() {
// First, give every source file an id of -1.
for (FileByNameMap::iterator file_it = files_.begin();
file_it != files_.end(); file_it++)
file_it->second->source_id_ = -1;
// Next, mark all files actually cited by our functions' line number
// info, by setting each one's source id to zero.
for (vector<Function *>::const_iterator func_it = functions_.begin();
func_it != functions_.end(); func_it++) {
Function *func = *func_it;
for (vector<Line>::iterator line_it = func->lines_.begin();
line_it != func->lines_.end(); line_it++)
line_it->file_->source_id_ = 0;
}
// Finally, assign source ids to those files that have been marked.
// We could have just assigned source id numbers while traversing
// the line numbers, but doing it this way numbers the files in
// lexicographical order by name, which is neat.
int next_source_id = 0;
for (FileByNameMap::iterator file_it = files_.begin();
file_it != files_.end(); file_it++)
if (! file_it->second->source_id_)
file_it->second->source_id_ = next_source_id++;
}
bool Module::ReportError() {
fprintf(stderr, "error writing symbol file: %s\n",
strerror (errno));
return false;
}
bool Module::Write(FILE *stream) {
if (0 > fprintf(stream, "MODULE %s %s %s %s\n",
os_.c_str(), architecture_.c_str(), id_.c_str(),
name_.c_str()))
return ReportError();
// Write out files.
AssignSourceIds();
for (FileByNameMap::iterator file_it = files_.begin();
file_it != files_.end(); file_it++) {
File *file = file_it->second;
if (file->source_id_ >= 0) {
if (0 > fprintf(stream, "FILE %d %s\n",
file->source_id_, file->name_.c_str()))
return ReportError();
}
}
// Write out functions and their lines.
for (vector<Function *>::const_iterator func_it = functions_.begin();
func_it != functions_.end(); func_it++) {
Function *func = *func_it;
if (0 > fprintf(stream, "FUNC %lx %lx %lu %s\n",
(unsigned long) (func->address_ - load_address_),
(unsigned long) func->size_,
(unsigned long) func->parameter_size_,
func->name_.c_str()))
return ReportError();
for (vector<Line>::iterator line_it = func->lines_.begin();
line_it != func->lines_.end(); line_it++)
if (0 > fprintf(stream, "%lx %lx %d %d\n",
(unsigned long) (line_it->address_ - load_address_),
(unsigned long) line_it->size_,
line_it->number_,
line_it->file_->source_id_))
return ReportError();
}
return true;
}
} // namespace google_breakpad
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