win: Implement exception snapshot

snapshot/win/exception_snapshot_win.h

-// Copyright 2014 The Crashpad Authors. All rights reserved.
+// Copyright 2015 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_MAC_EXCEPTION_SNAPSHOT_MAC_H_
-#define CRASHPAD_SNAPSHOT_MAC_EXCEPTION_SNAPSHOT_MAC_H_
+#ifndef CRASHPAD_SNAPSHOT_WIN_EXCEPTION_SNAPSHOT_WIN_H_
+#define CRASHPAD_SNAPSHOT_WIN_EXCEPTION_SNAPSHOT_WIN_H_
 
-#include <mach/mach.h>
 #include <stdint.h>
-
-#include <vector>
+#include <windows.h>
 
 #include "base/basictypes.h"
 #include "build/build_config.h"
 #include "snapshot/cpu_context.h"
 #include "snapshot/exception_snapshot.h"
-#include "util/mach/mach_extensions.h"
 #include "util/misc/initialization_state_dcheck.h"
+#include "util/win/address_types.h"
 
 namespace crashpad {
 
-class ProcessReader;
+class ProcessReaderWin;
 
 namespace internal {
 
-//! \brief An ExceptionSnapshot of an exception sustained by a running (or
-//!     crashed) process on a Mac OS X system.
-class ExceptionSnapshotMac final : public ExceptionSnapshot {
+class ExceptionSnapshotWin final : public ExceptionSnapshot {
  public:
-  ExceptionSnapshotMac();
-  ~ExceptionSnapshotMac() override;
+  ExceptionSnapshotWin();
+  ~ExceptionSnapshotWin() override;
 
   //! \brief Initializes the object.
   //!
-  //! Other than \a process_reader, the parameters may be passed directly
-  //! through from a Mach exception handler.
-  //!
   //! \param[in] process_reader A ProcessReader for the task that sustained the

[Mark Mentovai, 2015/08/18 16:17:19]

Is “task” the right nomenclature on Windows?

[scottmg, 2015/08/18 16:56:00]

Done.

   //!     exception.
+  //! \param[in] thread_id The thread id in which the exception occurred.

[Mark Mentovai, 2015/08/18 16:17:20]

Nits: ID here, `EXCEPTION_POINTERS` on the next line.

[scottmg, 2015/08/18 16:56:00]

Done.

+  //! \param[in] exception_pointers_address The address of an EXCEPTION_POINTERS
+  //!     record in the target process, passed through from the exception
+  //!     handler.
   //!
   //! \return `true` if the snapshot could be created, `false` otherwise with
   //!     an appropriate message logged.
-  bool Initialize(ProcessReader* process_reader,
-                  exception_behavior_t behavior,
-                  thread_t exception_thread,
-                  exception_type_t exception,
-                  const mach_exception_data_type_t* code,
-                  mach_msg_type_number_t code_count,
-                  thread_state_flavor_t flavor,
-                  ConstThreadState state,
-                  mach_msg_type_number_t state_count);
+  bool Initialize(ProcessReaderWin* process_reader,
+                  DWORD thread_id,
+                  WinVMAddress exception_pointers);
 
   // ExceptionSnapshot:
 
   const CPUContext* Context() const override;
   uint64_t ThreadID() const override;
   uint32_t Exception() const override;
   uint32_t ExceptionInfo() const override;
   uint64_t ExceptionAddress() const override;
   const std::vector<uint64_t>& Codes() const override;
 
  private:
 #if defined(ARCH_CPU_X86_FAMILY)
   union {
     CPUContextX86 x86;
     CPUContextX86_64 x86_64;
   } context_union_;
 #endif
   CPUContext context_;
   std::vector<uint64_t> codes_;
   uint64_t thread_id_;
   uint64_t exception_address_;
-  exception_type_t exception_;
-  uint32_t exception_code_0_;
+  uint32_t exception_flags_;
+  DWORD exception_code_;
   InitializationStateDcheck initialized_;
 
-  DISALLOW_COPY_AND_ASSIGN(ExceptionSnapshotMac);
+  DISALLOW_COPY_AND_ASSIGN(ExceptionSnapshotWin);
 };
 
 }  // namespace internal
 }  // namespace crashpad
 
-#endif  // CRASHPAD_SNAPSHOT_MAC_EXCEPTION_SNAPSHOT_MAC_H_
+#endif  // CRASHPAD_SNAPSHOT_WIN_EXCEPTION_SNAPSHOT_WIN_H_