Implement CrashGeneration{Server,Client}, OOP ExceptionHandler for Mac

src/client/mac/crash_generation/crash_generation_server.cc

Index: src/client/mac/crash_generation/crash_generation_server.cc
===================================================================
new file mode 100644
--- /dev/null
+++ b/src/client/mac/crash_generation/crash_generation_server.cc
@@ -0,0 +1,157 @@
+// 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.
+//     * 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.
+
+#include "client/mac/crash_generation/crash_generation_server.h"
+
+#include "client/mac/crash_generation/client_info.h"
+#include "client/mac/handler/minidump_generator.h"
+#include "common/mac/scoped_task_suspend-inl.h"
+
+namespace google_breakpad {
+
+CrashGenerationServer::CrashGenerationServer(
+    const char *mach_port_name,
+    OnClientDumpRequestCallback dump_callback,
+    void *dump_context,
+    OnClientExitingCallback exit_callback,
+    void *exit_context,
+    bool generate_dumps,
+    const std::string &dump_path)
+    : dump_callback_(dump_callback),
+      dump_context_(dump_context),
+      exit_callback_(exit_callback),
+      exit_context_(exit_context),
+      generate_dumps_(generate_dumps),
+      dump_dir_(dump_path.empty() ? "/tmp" : dump_path),
+      started_(false),
+      receive_port_(mach_port_name),
+      mach_port_name_(mach_port_name) {
+}
+
+CrashGenerationServer::~CrashGenerationServer() {
+  if (started_)
+    Stop();
+}
+
+bool CrashGenerationServer::Start() {
+  int thread_create_result = pthread_create(&server_thread_, NULL,
+                                            &WaitForMessages, this);
+  started_ = thread_create_result == 0;
+  return started_;
+}
+
+bool CrashGenerationServer::Stop() {
+  if (!started_)
+    return false;
+
+  // Send a quit message to the background thread, and then join it.
+  MachPortSender sender(mach_port_name_.c_str());
+  MachSendMessage quit_message(kQuitMessage);
+  const mach_msg_timeout_t kSendTimeoutMs = 2 * 1000;
+  kern_return_t result = sender.SendMessage(quit_message, kSendTimeoutMs);
+  if (result == KERN_SUCCESS) {
+    int thread_join_result = pthread_join(server_thread_, NULL);
+    started_ = thread_join_result != 0;
+  }
+
+  return !started_;
+}
+
+// static
+void *CrashGenerationServer::WaitForMessages(void *server) {
+  CrashGenerationServer *self =
+      reinterpret_cast<CrashGenerationServer*>(server);
+  while (self->WaitForOneMessage()) {}
+  return NULL;
+}
+
+bool CrashGenerationServer::WaitForOneMessage() {
+  MachReceiveMessage message;
+  kern_return_t result = receive_port_.WaitForMessage(&message,
+                                                      MACH_MSG_TIMEOUT_NONE);
+  if (result == KERN_SUCCESS) {
+    switch (message.GetMessageID()) {
+      case kDumpRequestMessage: {
+        ClientInfo &info = (ClientInfo &)*message.GetData();
+      
+        mach_port_t remote_task = message.GetTranslatedPort(0);
+        mach_port_t crashing_thread = message.GetTranslatedPort(1);
+        mach_port_t handler_thread = message.GetTranslatedPort(2);
+        mach_port_t ack_port = message.GetTranslatedPort(3);
+
+        bool result;
+        std::string dump_path;
+        if (generate_dumps_) {
+          ScopedTaskSuspend suspend(remote_task);
+
+          MinidumpGenerator generator(remote_task, handler_thread);
+          dump_path = generator.UniqueNameInDirectory(dump_dir_, NULL);
+        
+          if (info.exception_type && info.exception_code) {
+            generator.SetExceptionInformation(info.exception_type,
+                                              info.exception_code,
+                                              info.exception_subcode,
+                                              crashing_thread);
+          }
+          result = generator.Write(dump_path.c_str());
+        } else {
+          result = true;
+        }
+
+        if (result && dump_callback_) {
+          dump_callback_(dump_context_, info, dump_path);
+        }
+
+        // TODO(ted): support a way for the client to send additional data, perhaps

[Mark Mentovai, 2010/08/13 20:07:28]

80

+        // with a callback so users of the server can read the data themselves?
+      
+        if (ack_port != MACH_PORT_DEAD && ack_port != MACH_PORT_NULL) {
+          MachPortSender sender(ack_port);
+          MachSendMessage ack_message(kAcknowledgementMessage);
+          const mach_msg_timeout_t kSendTimeoutMs = 2 * 1000;
+
+          sender.SendMessage(ack_message, kSendTimeoutMs);
+        }
+
+        if (exit_callback_) {
+          exit_callback_(exit_context_, info);
+        }
+        break;
+      }
+      case kQuitMessage:
+        return false;
+    }
+  } else {  // result != KERN_SUCCESS
+    mach_error("WaitForMessage", result);
+    return false;
+  }
+  return true;
+}
+
+}  // namespace google_breakpad