breakpad/src/processor/source_line_resolver.h

// 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.
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// 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
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

// SourceLineResolver returns function/file/line info for a memory address.
// It uses address map files produced by a compatible writer, e.g.
// PDBSourceLineWriter.

#ifndef PROCESSOR_SOURCE_LINE_RESOLVER_H__
#define PROCESSOR_SOURCE_LINE_RESOLVER_H__

#include <string>
#include <ext/hash_map>
#include "google/airbag_types.h"

namespace google_airbag {

using std::string;
using __gnu_cxx::hash_map;

struct StackFrame;
struct StackFrameInfo;

class SourceLineResolver {
 public:
  typedef u_int64_t MemAddr;

  SourceLineResolver();
  ~SourceLineResolver();

  // Adds a module to this resolver, returning true on success.
  //
  // module_name may be an arbitrary string.  Typically, it will be the
  // filename of the module, optionally with version identifiers.
  //
  // map_file should contain line/address mappings for this module.
  bool LoadModule(const string &module_name, const string &map_file);

  // Returns true if a module with the given name has been loaded.
  bool HasModule(const string &module_name) const;

  // Fills in the function_base, function_name, source_file_name,
  // and source_line fields of the StackFrame.  The instruction and
  // module_name fields must already be filled in.  Additional debugging
  // information, if available, is returned.  If the information is not
  // available, returns NULL.  A NULL return value does not indicate an
  // error.  The caller takes ownership of any returned StackFrameInfo
  // object.
  StackFrameInfo* FillSourceLineInfo(StackFrame *frame) const;

 private:
  template<class T> class MemAddrMap;
  struct Line;
  struct Function;
  struct PublicSymbol;
  struct File;
  struct HashString {
    size_t operator()(const string &s) const;
  };
  class Module;

  // All of the modules we've loaded
  typedef hash_map<string, Module*, HashString> ModuleMap;
  ModuleMap *modules_;

  // Disallow unwanted copy ctor and assignment operator
  SourceLineResolver(const SourceLineResolver&);
  void operator=(const SourceLineResolver&);
};

}  // namespace google_airbag

#endif  // PROCESSOR_SOURCE_LINE_RESOLVER_H__