src/client/mac/crash_generation/crash_generation_client.cc

// Copyright (c) 2010 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.
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// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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#include "client/mac/crash_generation/crash_generation_client.h"

#include "client/mac/crash_generation/crash_generation_server.h"
#include "common/mac/MachIPC.h"

namespace google_breakpad {

bool CrashGenerationClient::RequestDumpForException(
    int exception_type,
    int exception_code,
    int exception_subcode,
    mach_port_t crashing_thread) {
  // The server will send a message to this port indicating that it
  // has finished its work.
  ReceivePort acknowledge_port;

  MachSendMessage message(kDumpRequestMessage);
  message.AddDescriptor(mach_task_self());            // this task
  message.AddDescriptor(crashing_thread);             // crashing thread
  message.AddDescriptor(mach_thread_self());          // handler thread
  message.AddDescriptor(acknowledge_port.GetPort());  // message receive port

  ExceptionInfo info;
  info.exception_type = exception_type;
  info.exception_code = exception_code;
  info.exception_subcode = exception_subcode;
  message.SetData(&info, sizeof(info));

  const mach_msg_timeout_t kSendTimeoutMs = 2 * 1000;
  kern_return_t result = sender_.SendMessage(message, kSendTimeoutMs);
  if (result != KERN_SUCCESS)
    return false;

  // Give the server slightly longer to reply since it has to
  // inspect this task and write the minidump.
  const mach_msg_timeout_t kReceiveTimeoutMs = 5 * 1000;
  MachReceiveMessage acknowledge_message;
  result = acknowledge_port.WaitForMessage(&acknowledge_message,
					   kReceiveTimeoutMs);
  return result == KERN_SUCCESS;
}

}  // namespace google_breakpad