snapshot: Add a minimal ModuleSnapshotMinidump and accessor from ProcessSnapshotMinidump

snapshot/minidump/module_snapshot_minidump.h

Index: snapshot/minidump/module_snapshot_minidump.h
diff --git a/snapshot/minidump/module_snapshot_minidump.h b/snapshot/minidump/module_snapshot_minidump.h
new file mode 100644
index 0000000000000000000000000000000000000000..b9869d5fb0ee52c0b3dc9d7efc42f079c45ba530
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+++ b/snapshot/minidump/module_snapshot_minidump.h
@@ -0,0 +1,99 @@
+// Copyright 2014 The Crashpad Authors. All rights reserved.

[Robert Sesek, 2015/03/04 01:52:25]

2015

+//
+// 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.
+
+#ifndef CRASHPAD_SNAPSHOT_MINIDUMP_MODULE_SNAPSHOT_MINIDUMP_H_
+#define CRASHPAD_SNAPSHOT_MINIDUMP_MODULE_SNAPSHOT_MINIDUMP_H_
+
+#include <windows.h>
+#include <dbghelp.h>
+#include <stdint.h>
+#include <sys/types.h>
+
+#include <map>
+#include <string>
+#include <vector>
+
+#include "base/basictypes.h"
+#include "snapshot/module_snapshot.h"
+#include "util/file/file_reader.h"
+#include "util/misc/initialization_state_dcheck.h"
+
+namespace crashpad {
+namespace internal {
+
+//! \brief A ModuleSnapshot based on a module in a minidump file.
+class ModuleSnapshotMinidump final : public ModuleSnapshot {
+ public:
+  ModuleSnapshotMinidump();
+  ~ModuleSnapshotMinidump() override;
+
+  //! \brief Initializes the object.
+  //!
+  //! \param[in] file_reader A file reader corresponding to a minidump file.
+  //!     The file reader must support seeking.

[Robert Sesek, 2015/03/04 01:52:25]

Optional and out of scope: Go does a nice thing where it composes Reader and
Seeker into a ReaderSeeker. The same could be done here to have a
FileReaderSeeker pure virtual interface.

+  //! \param[in] minidump_module_rva The file offset in \a file_reader at which
+  //!     the module’s MINIDUMP_MODULE structure is located.
+  //! \param[in] minidump_crashpad_module_info_location The location in \a
+  //!     file_reader at which the module’s corresponding
+  //!     MinidumpModuleCrashpadInfo structure is located. If no such
+  //!     corresponding structure is available for a module, this may be
+  //!     `nullptr`.
+  //!
+  //! \return `true` if the snapshot could be created, `false` otherwise with
+  //!     an appropriate message logged. A failure to read
+  //!     MinidumpModuleCrashpadInfo is not considered a failure, although
+  //!     a message will be logged in this case.
+  bool Initialize(FileReaderInterface* file_reader,
+                  RVA minidump_module_rva,
+                  const MINIDUMP_LOCATION_DESCRIPTOR*
+                      minidump_crashpad_module_info_location);
+
+  // ModuleSnapshot:
+
+  std::string Name() const override;
+  uint64_t Address() const override;
+  uint64_t Size() const override;
+  time_t Timestamp() const override;
+  void FileVersion(uint16_t* version_0,
+                   uint16_t* version_1,
+                   uint16_t* version_2,
+                   uint16_t* version_3) const override;
+  void SourceVersion(uint16_t* version_0,
+                     uint16_t* version_1,
+                     uint16_t* version_2,
+                     uint16_t* version_3) const override;
+  ModuleType GetModuleType() const override;
+  void UUID(crashpad::UUID* uuid) const override;
+  std::vector<std::string> AnnotationsVector() const override;
+  std::map<std::string, std::string> AnnotationsSimpleMap() const override;
+
+ private:
+  // Initializes data carried in a MinidumpModuleCrashpadInfo structure on
+  // behalf of Initialize().
+  void InitializeModuleCrashpadInfo(FileReaderInterface* file_reader,
+                                    const MINIDUMP_LOCATION_DESCRIPTOR*
+                                        minidump_module_crashpad_info_location);
+
+  MINIDUMP_MODULE minidump_module_;
+  std::vector<std::string> annotations_vector_;
+  std::map<std::string, std::string> annotations_simple_map_;
+  InitializationStateDcheck initialized_;
+
+  DISALLOW_COPY_AND_ASSIGN(ModuleSnapshotMinidump);
+};
+
+}  // namespace internal
+}  // namespace crashpad
+
+#endif  // CRASHPAD_SNAPSHOT_MINIDUMP_MODULE_SNAPSHOT_MINIDUMP_H_