Module API (#32). r=waylonis, bryner

- Introduces a standard API for dealing with modules.  MinidumpModule
   is now a concrete implementation of this API.  Code may interact with
   single modules using the CodeModule interface, and collections of
   modules using its container, the CodeModules interface.
 - CodeModule is used directly by SymbolSupplier implementations and
   SourceLineResolver.  Reliance on the specific implementation in
   MinidumpModule has been eliminated.
 - Module lists are now added to ProcessState objects.  Module references
   in each stack frame are now pointers to objects in these module lists.
 - The sample minidump_stackwalk tool prints the module list after printing
   all threads' stacks.

http://groups.google.com/group/airbag-dev/browse_frm/thread/a9c0550edde54cf8


git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@74 4c0a9323-5329-0410-9bdc-e9ce6186880e

src/processor/basic_code_module.h

@@ -0,0 +1,95 @@
+// 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.
+
+// basic_code_module.h: Carries information about code modules that are loaded
+// into a process.
+//
+// This is a basic concrete implementation of CodeModule.  It cannot be
+// instantiated directly, only based on other objects that implement
+// the CodeModule interface.  It exists to provide a CodeModule implementation
+// a place to store information when the life of the original object (such as
+// a MinidumpModule) cannot be guaranteed.
+//
+// Author: Mark Mentovai
+
+#ifndef PROCESSOR_BASIC_CODE_MODULE_H__
+#define PROCESSOR_BASIC_CODE_MODULE_H__
+
+#include <string>
+
+#include "google_airbag/processor/code_module.h"
+
+namespace google_airbag {
+
+using std::string;
+
+class BasicCodeModule : public CodeModule {
+ public:
+  // Creates a new BasicCodeModule given any existing CodeModule
+  // implementation.  This is useful to make a copy of the data relevant to
+  // the CodeModule interface without requiring all of the resources that
+  // other CodeModule implementations may require.
+  explicit BasicCodeModule(const CodeModule *that)
+      : base_address_(that->base_address()),
+        size_(that->size()),
+        code_file_(that->code_file()),
+        code_identifier_(that->code_identifier()),
+        debug_file_(that->debug_file()),
+        debug_identifier_(that->debug_identifier()),
+        version_(that->version()) {}
+  virtual ~BasicCodeModule() {}
+
+  // See code_module.h for descriptions of these methods and the associated
+  // members.
+  virtual u_int64_t base_address() const { return base_address_; }
+  virtual u_int64_t size() const { return size_; }
+  virtual string code_file() const { return code_file_; }
+  virtual string code_identifier() const { return code_identifier_; }
+  virtual string debug_file() const { return debug_file_; }
+  virtual string debug_identifier() const { return debug_identifier_; }
+  virtual string version() const { return version_; }
+  virtual const CodeModule* Copy() const { return new BasicCodeModule(this); }
+
+ private:
+  u_int64_t base_address_;
+  u_int64_t size_;
+  string code_file_;
+  string code_identifier_;
+  string debug_file_;
+  string debug_identifier_;
+  string version_;
+
+  // Disallow copy constructor and assignment operator.
+  BasicCodeModule(const BasicCodeModule &that);
+  void operator=(const BasicCodeModule &that);
+};
+
+}  // namespace google_airbag
+
+#endif  // PROCESSOR_BASIC_CODE_MODULE_H__