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// Copyright (C) 2006 Google Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include <stdio.h>
#include <atlbase.h>
#include <dia2.h>
#include "pdb_source_line_writer.h"
namespace google_airbag {
PDBSourceLineWriter::PDBSourceLineWriter() : output_(NULL) {
}
PDBSourceLineWriter::~PDBSourceLineWriter() {
}
bool PDBSourceLineWriter::Open(const wstring &pdb_file) {
Close();
if (FAILED(CoInitialize(NULL))) {
fprintf(stderr, "CoInitialize failed\n");
return false;
}
CComPtr<IDiaDataSource> data_source;
if (FAILED(data_source.CoCreateInstance(CLSID_DiaSource))) {
fprintf(stderr, "CoCreateInstance CLSID_DiaSource failed "
"(msdia80.dll unregistered?)\n");
return false;
}
if (FAILED(data_source->loadDataFromPdb(pdb_file.c_str()))) {
fprintf(stderr, "loadDataFromPdb failed\n");
return false;
}
if (FAILED(data_source->openSession(&session_))) {
fprintf(stderr, "openSession failed\n");
}
return true;
}
bool PDBSourceLineWriter::PrintLines(IDiaEnumLineNumbers *lines) {
// The line number format is:
// <rva> <line number> <source file id>
CComPtr<IDiaLineNumber> line;
ULONG count;
while (SUCCEEDED(lines->Next(1, &line, &count)) && count == 1) {
DWORD rva;
if (FAILED(line->get_relativeVirtualAddress(&rva))) {
fprintf(stderr, "failed to get line rva\n");
return false;
}
DWORD source_id;
if (FAILED(line->get_sourceFileId(&source_id))) {
fprintf(stderr, "failed to get line source file id\n");
return false;
}
DWORD line_num;
if (FAILED(line->get_lineNumber(&line_num))) {
fprintf(stderr, "failed to get line number\n");
return false;
}
fprintf(output_, "%x %d %d\n", rva, line_num, source_id);
line.Release();
}
return true;
}
bool PDBSourceLineWriter::PrintFunction(IDiaSymbol *function) {
// The function format is:
// FUNC <address> <function>
CComBSTR name;
if (FAILED(function->get_name(&name))) {
fprintf(stderr, "failed to get function name\n");
return false;
}
if (name.Length() == 0) {
fprintf(stderr, "empty function name\n");
return false;
}
ULONGLONG length;
if (FAILED(function->get_length(&length))) {
fprintf(stderr, "failed to get function length\n");
return false;
}
DWORD rva;
if (FAILED(function->get_relativeVirtualAddress(&rva))) {
fprintf(stderr, "couldn't get rva\n");
return false;
}
CComPtr<IDiaEnumLineNumbers> lines;
if (FAILED(session_->findLinesByRVA(rva, DWORD(length), &lines))) {
return false;
}
fwprintf(output_, L"FUNC %x %s\n", rva, name);
if (!PrintLines(lines)) {
return false;
}
return true;
}
bool PDBSourceLineWriter::PrintSourceFiles() {
CComPtr<IDiaSymbol> global;
if (FAILED(session_->get_globalScope(&global))) {
fprintf(stderr, "get_globalScope failed\n");
return false;
}
CComPtr<IDiaEnumSymbols> compilands;
if (FAILED(global->findChildren(SymTagCompiland, NULL,
nsNone, &compilands))) {
fprintf(stderr, "findChildren failed\n");
return false;
}
CComPtr<IDiaSymbol> compiland;
ULONG count;
while (SUCCEEDED(compilands->Next(1, &compiland, &count)) && count == 1) {
CComPtr<IDiaEnumSourceFiles> source_files;
if (FAILED(session_->findFile(compiland, NULL, nsNone, &source_files))) {
return false;
}
CComPtr<IDiaSourceFile> file;
while (SUCCEEDED(source_files->Next(1, &file, &count)) && count == 1) {
DWORD file_id;
if (FAILED(file->get_uniqueId(&file_id))) {
return false;
}
CComBSTR file_name;
if (FAILED(file->get_fileName(&file_name))) {
return false;
}
fwprintf(output_, L"FILE %d %s\n", file_id, file_name);
file.Release();
}
compiland.Release();
}
return true;
}
bool PDBSourceLineWriter::PrintFunctions() {
CComPtr<IDiaEnumSymbolsByAddr> symbols;
if (FAILED(session_->getSymbolsByAddr(&symbols))) {
fprintf(stderr, "failed to get symbol enumerator\n");
return false;
}
CComPtr<IDiaSymbol> symbol;
if (FAILED(symbols->symbolByAddr(1, 0, &symbol))) {
fprintf(stderr, "failed to enumerate symbols\n");
return false;
}
DWORD rva_last = 0;
if (FAILED(symbol->get_relativeVirtualAddress(&rva_last))) {
fprintf(stderr, "failed to get symbol rva\n");
return false;
}
ULONG count;
do {
DWORD tag;
if (FAILED(symbol->get_symTag(&tag))) {
fprintf(stderr, "failed to get symbol tag\n");
return false;
}
if (tag == SymTagFunction) {
if (!PrintFunction(symbol)) {
return false;
}
}
symbol.Release();
} while (SUCCEEDED(symbols->Next(1, &symbol, &count)) && count == 1);
return true;
}
bool PDBSourceLineWriter::WriteMap(FILE *map_file) {
bool ret = false;
output_ = map_file;
if (PrintSourceFiles() && PrintFunctions()) {
ret = true;
}
output_ = NULL;
return ret;
}
void PDBSourceLineWriter::Close() {
session_.Release();
}
} // namespace google_airbag
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