Add MemorySnapshotMac

snapshot/memory_snapshot_mac.h

Index: snapshot/memory_snapshot_mac.h
diff --git a/snapshot/memory_snapshot_mac.h b/snapshot/memory_snapshot_mac.h
new file mode 100644
index 0000000000000000000000000000000000000000..4964a777ff1a40c1eeabd06169ca7ee3c1185076
--- /dev/null
+++ b/snapshot/memory_snapshot_mac.h
@@ -0,0 +1,68 @@
+// Copyright 2014 The Crashpad Authors. All rights reserved.
+//
+// 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_MEMORY_SNAPSHOT_MAC_H_
+#define CRASHPAD_SNAPSHOT_MEMORY_SNAPSHOT_MAC_H_
+
+#include <stdint.h>
+#include <sys/types.h>
+
+#include "base/basictypes.h"
+#include "snapshot/memory_snapshot.h"
+#include "util/mac/process_reader.h"
+#include "util/misc/initialization_state_dcheck.h"
+
+namespace crashpad {
+namespace internal {
+
+//! \brief A MemorySnapshot of a memory region in a process on the running
+//!     system, when the system runs Mac OS X.
+class MemorySnapshotMac final : public MemorySnapshot {
+ public:
+  MemorySnapshotMac();
+  ~MemorySnapshotMac();
+
+  //! \brief Initializes the object.
+  //!
+  //! Memory is read lazily. No attempt is made to read the memory snapshot data
+  //! until Read() is called, and the memory snapshot data is discared when
+  //! Read() returns.
+  //!
+  //! \param[in] process_reader A reader for the process being snapshotted.
+  //! \param[in] address The base address of the memory region to snapshot, in
+  //!     the snapshot process’ address space.
+  //! \param[in] size The size of the memory region to snapshot.
+  void Initialize(ProcessReader* process_reader,
+                  uint64_t address,
+                  uint64_t size);
+
+  // MemorySnapshot:
+
+  virtual uint64_t Address() const override;
+  virtual size_t Size() const override;
+  virtual bool Read(Delegate* delegate) const override;
+
+ private:
+  ProcessReader* process_reader_;  // weak
+  uint64_t address_;
+  uint64_t size_;
+  InitializationStateDcheck initialized_;
+
+  DISALLOW_COPY_AND_ASSIGN(MemorySnapshotMac);
+};
+
+}  // namespace internal
+}  // namespace crashpad
+
+#endif  // CRASHPAD_SNAPSHOT_MEMORY_SNAPSHOT_MAC_H_