273 lines
9.9 KiB
C++
273 lines
9.9 KiB
C++
// Copyright (c) 2010 Google Inc.
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// Original author: Jim Blandy <jimb@mozilla.com> <jimb@red-bean.com>
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// module.cc: Implement google_breakpad::Module. See module.h.
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#include "common/module.h"
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#include <assert.h>
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#include <errno.h>
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#include <string.h>
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namespace google_breakpad {
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Module::Module(const string &name, const string &os,
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const string &architecture, const string &id) :
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name_(name),
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os_(os),
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architecture_(architecture),
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id_(id),
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load_address_(0) { }
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Module::~Module() {
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for (FileByNameMap::iterator it = files_.begin(); it != files_.end(); it++)
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delete it->second;
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for (FunctionSet::iterator it = functions_.begin();
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it != functions_.end(); it++)
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delete *it;
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for (vector<StackFrameEntry *>::iterator it = stack_frame_entries_.begin();
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it != stack_frame_entries_.end(); it++)
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delete *it;
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for (ExternSet::iterator it = externs_.begin();
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it != externs_.end(); it++)
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delete *it;
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}
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void Module::SetLoadAddress(Address address) {
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load_address_ = address;
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}
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void Module::AddFunction(Function *function) {
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// FUNC lines must not hold an empty name, so catch the problem early if
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// callers try to add one.
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assert(!function->name.empty());
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std::pair<FunctionSet::iterator,bool> ret = functions_.insert(function);
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if (!ret.second) {
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// Free the duplicate that was not inserted because this Module
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// now owns it.
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delete function;
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}
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}
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void Module::AddFunctions(vector<Function *>::iterator begin,
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vector<Function *>::iterator end) {
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for (vector<Function *>::iterator it = begin; it != end; it++)
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AddFunction(*it);
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}
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void Module::AddStackFrameEntry(StackFrameEntry *stack_frame_entry) {
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stack_frame_entries_.push_back(stack_frame_entry);
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}
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void Module::AddExtern(Extern *ext) {
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std::pair<ExternSet::iterator,bool> ret = externs_.insert(ext);
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if (!ret.second) {
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// Free the duplicate that was not inserted because this Module
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// now owns it.
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delete ext;
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}
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}
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void Module::GetFunctions(vector<Function *> *vec,
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vector<Function *>::iterator i) {
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vec->insert(i, functions_.begin(), functions_.end());
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}
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void Module::GetExterns(vector<Extern *> *vec,
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vector<Extern *>::iterator i) {
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vec->insert(i, externs_.begin(), externs_.end());
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}
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Module::File *Module::FindFile(const string &name) {
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// A tricky bit here. The key of each map entry needs to be a
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// pointer to the entry's File's name string. This means that we
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// can't do the initial lookup with any operation that would create
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// an empty entry for us if the name isn't found (like, say,
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// operator[] or insert do), because such a created entry's key will
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// be a pointer the string passed as our argument. Since the key of
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// a map's value type is const, we can't fix it up once we've
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// created our file. lower_bound does the lookup without doing an
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// insertion, and returns a good hint iterator to pass to insert.
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// Our "destiny" is where we belong, whether we're there or not now.
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FileByNameMap::iterator destiny = files_.lower_bound(&name);
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if (destiny == files_.end()
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|| *destiny->first != name) { // Repeated string comparison, boo hoo.
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File *file = new File;
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file->name = name;
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file->source_id = -1;
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destiny = files_.insert(destiny,
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FileByNameMap::value_type(&file->name, file));
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}
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return destiny->second;
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}
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Module::File *Module::FindFile(const char *name) {
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string name_string = name;
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return FindFile(name_string);
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}
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Module::File *Module::FindExistingFile(const string &name) {
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FileByNameMap::iterator it = files_.find(&name);
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return (it == files_.end()) ? NULL : it->second;
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}
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void Module::GetFiles(vector<File *> *vec) {
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vec->clear();
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for (FileByNameMap::iterator it = files_.begin(); it != files_.end(); it++)
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vec->push_back(it->second);
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}
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void Module::GetStackFrameEntries(vector<StackFrameEntry *> *vec) {
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*vec = stack_frame_entries_;
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}
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void Module::AssignSourceIds() {
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// First, give every source file an id of -1.
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for (FileByNameMap::iterator file_it = files_.begin();
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file_it != files_.end(); file_it++)
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file_it->second->source_id = -1;
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// Next, mark all files actually cited by our functions' line number
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// info, by setting each one's source id to zero.
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for (FunctionSet::const_iterator func_it = functions_.begin();
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func_it != functions_.end(); func_it++) {
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Function *func = *func_it;
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for (vector<Line>::iterator line_it = func->lines.begin();
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line_it != func->lines.end(); line_it++)
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line_it->file->source_id = 0;
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}
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// Finally, assign source ids to those files that have been marked.
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// We could have just assigned source id numbers while traversing
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// the line numbers, but doing it this way numbers the files in
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// lexicographical order by name, which is neat.
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int next_source_id = 0;
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for (FileByNameMap::iterator file_it = files_.begin();
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file_it != files_.end(); file_it++)
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if (!file_it->second->source_id)
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file_it->second->source_id = next_source_id++;
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}
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bool Module::ReportError() {
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fprintf(stderr, "error writing symbol file: %s\n",
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strerror(errno));
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return false;
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}
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bool Module::WriteRuleMap(const RuleMap &rule_map, FILE *stream) {
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for (RuleMap::const_iterator it = rule_map.begin();
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it != rule_map.end(); it++) {
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if (it != rule_map.begin() &&
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0 > putc(' ', stream))
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return false;
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if (0 > fprintf(stream, "%s: %s", it->first.c_str(), it->second.c_str()))
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return false;
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}
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return true;
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}
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bool Module::Write(FILE *stream) {
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if (0 > fprintf(stream, "MODULE %s %s %s %s\n",
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os_.c_str(), architecture_.c_str(), id_.c_str(),
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name_.c_str()))
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return ReportError();
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AssignSourceIds();
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// Write out files.
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for (FileByNameMap::iterator file_it = files_.begin();
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file_it != files_.end(); file_it++) {
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File *file = file_it->second;
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if (file->source_id >= 0) {
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if (0 > fprintf(stream, "FILE %d %s\n",
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file->source_id, file->name.c_str()))
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return ReportError();
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}
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}
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// Write out functions and their lines.
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for (FunctionSet::const_iterator func_it = functions_.begin();
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func_it != functions_.end(); func_it++) {
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Function *func = *func_it;
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if (0 > fprintf(stream, "FUNC %llx %llx %llx %s\n",
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(unsigned long long) (func->address - load_address_),
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(unsigned long long) func->size,
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(unsigned long long) func->parameter_size,
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func->name.c_str()))
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return ReportError();
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for (vector<Line>::iterator line_it = func->lines.begin();
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line_it != func->lines.end(); line_it++)
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if (0 > fprintf(stream, "%llx %llx %d %d\n",
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(unsigned long long) (line_it->address - load_address_),
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(unsigned long long) line_it->size,
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line_it->number,
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line_it->file->source_id))
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return ReportError();
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}
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// Write out 'PUBLIC' records.
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for (ExternSet::const_iterator extern_it = externs_.begin();
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extern_it != externs_.end(); extern_it++) {
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Extern *ext = *extern_it;
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if (0 > fprintf(stream, "PUBLIC %llx 0 %s\n",
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(unsigned long long) (ext->address - load_address_),
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ext->name.c_str()))
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return ReportError();
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}
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// Write out 'STACK CFI INIT' and 'STACK CFI' records.
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vector<StackFrameEntry *>::const_iterator frame_it;
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for (frame_it = stack_frame_entries_.begin();
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frame_it != stack_frame_entries_.end(); frame_it++) {
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StackFrameEntry *entry = *frame_it;
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if (0 > fprintf(stream, "STACK CFI INIT %llx %llx ",
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(unsigned long long) entry->address - load_address_,
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(unsigned long long) entry->size)
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|| !WriteRuleMap(entry->initial_rules, stream)
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|| 0 > putc('\n', stream))
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return ReportError();
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// Write out this entry's delta rules as 'STACK CFI' records.
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for (RuleChangeMap::const_iterator delta_it = entry->rule_changes.begin();
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delta_it != entry->rule_changes.end(); delta_it++) {
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if (0 > fprintf(stream, "STACK CFI %llx ",
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(unsigned long long) delta_it->first - load_address_)
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|| !WriteRuleMap(delta_it->second, stream)
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|| 0 > putc('\n', stream))
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return ReportError();
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}
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}
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return true;
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}
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} // namespace google_breakpad
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