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// Copyright (c) 2006, 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.
// simple_symbol_supplier.h: A simple SymbolSupplier implementation
//
// SimpleSymbolSupplier is a straightforward implementation of SymbolSupplier
// that stores symbol files in a filesystem tree. A SimpleSymbolSupplier is
// created with one or more base directories, which are the root paths for all
// symbol files. Each symbol file contained therein has a directory entry in
// the base directory with a name identical to the corresponding debugging
// file (pdb). Within each of these directories, there are subdirectories
// named for the debugging file's identifier. For recent pdb files, this is
// a concatenation of the pdb's uuid and age, presented in hexadecimal form,
// without any dashes or separators. The uuid is in uppercase hexadecimal
// and the age is in lowercase hexadecimal. Within that subdirectory,
// SimpleSymbolSupplier expects to find the symbol file, which is named
// identically to the debug file, but with a .sym extension. If the original
// debug file had a name ending in .pdb, the .pdb extension will be replaced
// with .sym. This sample hierarchy is rooted at the "symbols" base
// directory:
//
// symbols
// symbols/test_app.pdb
// symbols/test_app.pdb/63FE4780728D49379B9D7BB6460CB42A1
// symbols/test_app.pdb/63FE4780728D49379B9D7BB6460CB42A1/test_app.sym
// symbols/kernel32.pdb
// symbols/kernel32.pdb/BCE8785C57B44245A669896B6A19B9542
// symbols/kernel32.pdb/BCE8785C57B44245A669896B6A19B9542/kernel32.sym
//
// In this case, the uuid of test_app.pdb is
// 63fe4780-728d-4937-9b9d-7bb6460cb42a and its age is 1.
//
// This scheme was chosen to be roughly analogous to the way that
// symbol files may be accessed from Microsoft Symbol Server. A hierarchy
// used for Microsoft Symbol Server storage is usable as a hierarchy for
// SimpleSymbolServer, provided that the pdb files are transformed to dumped
// format using a tool such as dump_syms, and given a .sym extension.
//
// SimpleSymbolSupplier will iterate over all root paths searching for
// a symbol file existing in that path.
//
// SimpleSymbolSupplier supports any debugging file which can be identified
// by a CodeModule object's debug_file and debug_identifier accessors. The
// expected ultimate source of these CodeModule objects are MinidumpModule
// objects; it is this class that is responsible for assigning appropriate
// values for debug_file and debug_identifier.
//
// Author: Mark Mentovai
#ifndef PROCESSOR_SIMPLE_SYMBOL_SUPPLIER_H__
#define PROCESSOR_SIMPLE_SYMBOL_SUPPLIER_H__
#include <map>
#include <string>
#include <vector>
#include "common/using_std_string.h"
#include "google_breakpad/processor/symbol_supplier.h"
namespace google_breakpad {
using std::map;
using std::vector;
class CodeModule;
class SimpleSymbolSupplier : public SymbolSupplier {
public:
// Creates a new SimpleSymbolSupplier, using path as the root path where
// symbols are stored.
explicit SimpleSymbolSupplier(const string &path) : paths_(1, path) {}
// Creates a new SimpleSymbolSupplier, using paths as a list of root
// paths where symbols may be stored.
explicit SimpleSymbolSupplier(const vector<string> &paths) : paths_(paths) {}
virtual ~SimpleSymbolSupplier() {}
// Returns the path to the symbol file for the given module. See the
// description above.
virtual SymbolResult GetSymbolFile(const CodeModule *module,
const SystemInfo *system_info,
string *symbol_file);
virtual SymbolResult GetSymbolFile(const CodeModule *module,
const SystemInfo *system_info,
string *symbol_file,
string *symbol_data);
// Allocates data buffer on heap and writes symbol data into buffer.
// Symbol supplier ALWAYS takes ownership of the data buffer.
virtual SymbolResult GetCStringSymbolData(const CodeModule *module,
const SystemInfo *system_info,
string *symbol_file,
char **symbol_data);
// Free the data buffer allocated in the above GetCStringSymbolData();
virtual void FreeSymbolData(const CodeModule *module);
protected:
SymbolResult GetSymbolFileAtPathFromRoot(const CodeModule *module,
const SystemInfo *system_info,
const string &root_path,
string *symbol_file);
private:
map<string, char *> memory_buffers_;
vector<string> paths_;
};
} // namespace google_breakpad
#endif // PROCESSOR_SIMPLE_SYMBOL_SUPPLIER_H__
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