win: Implement exception snapshot

client/crashpad_info.h

 // 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,
@@ skipping 81 matching lines @@
   //! the Crashpad handler may choose not to forward all exceptions to the
   //! system’s crash reporter in cases where it has reason to believe that the
   //! system’s crash reporter would not normally have handled the exception in
   //! Crashpad’s absence.
   void set_system_crash_reporter_forwarding(
       TriState system_crash_reporter_forwarding) {
     system_crash_reporter_forwarding_ = system_crash_reporter_forwarding;
   }
 
 #if defined(OS_WIN)
-  //! \brief Save an EXCEPTION_POINTERS record for the crash handler.
+  //! \brief Save the crashing thread ID for the crash handler.
+  void set_thread_id(DWORD thread_id) { thread_id_ = thread_id; }
+  DWORD thread_id() const { return thread_id_; }
+
+  //! \brief Save an `EXCEPTION_POINTERS` record for the crash handler.
   void set_exception_pointers(EXCEPTION_POINTERS* exception_pointers) {
     exception_pointers_ = exception_pointers;
   }
+  EXCEPTION_POINTERS* exception_pointers() const { return exception_pointers_; }
 #endif  // OS_WIN
 
   enum : uint32_t {
     kSignature = 'CPad',
   };
 
  private:
   // The compiler won’t necessarily see anyone using these fields, but it
   // shouldn’t warn about that. These fields aren’t intended for use by the
   // process they’re found in, they’re supposed to be read by the crash
   // reporting process.
 #if defined(__clang__)
 #pragma clang diagnostic push
 #pragma clang diagnostic ignored "-Wunused-private-field"
 #endif
 
   // Fields present in version 1:
   uint32_t signature_;  // kSignature
   uint32_t size_;  // The size of the entire CrashpadInfo structure.
   uint32_t version_;  // kVersion
   TriState crashpad_handler_behavior_;
   TriState system_crash_reporter_forwarding_;
   uint16_t padding_0_;
   SimpleStringDictionary* simple_annotations_;  // weak
 
 #if defined(OS_WIN)
   EXCEPTION_POINTERS* exception_pointers_;
+  DWORD thread_id_;
 #endif  // OS_WIN
 
 #if defined(__clang__)
 #pragma clang diagnostic pop
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(CrashpadInfo);
 };
 
 }  // namespace crashpad
 
 #endif  // CRASHPAD_CLIENT_CRASHPAD_INFO_H_