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+// Copyright (c) 2014 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.
+
+// dump_context.h: A (mini/micro) dump CPU-specific context.
+
+#ifndef GOOGLE_BREAKPAD_PROCESSOR_DUMP_CONTEXT_H__
+#define GOOGLE_BREAKPAD_PROCESSOR_DUMP_CONTEXT_H__
+
+#include "google_breakpad/common/minidump_format.h"
+#include "google_breakpad/processor/dump_object.h"
+
+namespace google_breakpad {
+
+// DumpContext carries a CPU-specific MDRawContext structure, which contains CPU
+// context such as register states.
+class DumpContext : public DumpObject {
+ public:
+  virtual ~DumpContext();
+
+  // Returns an MD_CONTEXT_* value such as MD_CONTEXT_X86 or MD_CONTEXT_PPC
+  // identifying the CPU type that the context was collected from.  The
+  // returned value will identify the CPU only, and will have any other
+  // MD_CONTEXT_* bits masked out.  Returns 0 on failure.
+  uint32_t GetContextCPU() const;
+
+  // Return the raw value of |context_flags_|
+  uint32_t GetContextFlags() const;
+
+  // Returns raw CPU-specific context data for the named CPU type.  If the
+  // context data does not match the CPU type or does not exist, returns NULL.
+  const MDRawContextAMD64* GetContextAMD64() const;
+  const MDRawContextARM*   GetContextARM() const;
+  const MDRawContextARM64* GetContextARM64() const;
+  const MDRawContextMIPS*  GetContextMIPS() const;
+  const MDRawContextPPC*   GetContextPPC() const;
+  const MDRawContextPPC64* GetContextPPC64() const;
+  const MDRawContextSPARC* GetContextSPARC() const;
+  const MDRawContextX86*   GetContextX86() const;
+
+  // A convenience method to get the instruction pointer out of the
+  // MDRawContext, since it varies per-CPU architecture.
+  bool GetInstructionPointer(uint64_t* ip) const;
+
+  // Similar to the GetInstructionPointer method, this method gets the stack
+  // pointer for all CPU architectures.
+  bool GetStackPointer(uint64_t* sp) const;
+
+  // Print a human-readable representation of the object to stdout.
+  void Print();
+
+ protected:
+  DumpContext();
+
+  // Sets row CPU-specific context data for the names CPU type.
+  void SetContextFlags(uint32_t context_flags);
+  void SetContextX86(MDRawContextX86* x86);
+  void SetContextPPC(MDRawContextPPC* ppc);
+  void SetContextPPC64(MDRawContextPPC64* ppc64);
+  void SetContextAMD64(MDRawContextAMD64* amd64);
+  void SetContextSPARC(MDRawContextSPARC* ctx_sparc);
+  void SetContextARM(MDRawContextARM* arm);
+  void SetContextARM64(MDRawContextARM64* arm64);
+  void SetContextMIPS(MDRawContextMIPS* ctx_mips);
+
+  // Free the CPU-specific context structure.
+  void FreeContext();
+
+ private:
+  // The CPU-specific context structure.
+  union {
+    MDRawContextBase*  base;
+    MDRawContextX86*   x86;
+    MDRawContextPPC*   ppc;
+    MDRawContextPPC64* ppc64;
+    MDRawContextAMD64* amd64;
+    // on Solaris SPARC, sparc is defined as a numeric constant,
+    // so variables can NOT be named as sparc
+    MDRawContextSPARC* ctx_sparc;
+    MDRawContextARM*   arm;
+    MDRawContextARM64* arm64;
+    MDRawContextMIPS*  ctx_mips;
+  } context_;
+
+  // Store this separately because of the weirdo AMD64 context
+  uint32_t context_flags_;
+};
+
+}  // namespace google_breakpad
+
+#endif  // GOOGLE_BREAKPAD_PROCESSOR_DUMP_CONTEXT_H__