NaCl: Split the debug exception handler thread into a separate file

chrome/nacl/nacl_broker_listener.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/nacl/nacl_broker_listener.h"
 
 #include "base/base_switches.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/message_loop.h"
 #include "base/message_loop_proxy.h"
 #include "base/path_service.h"
 #include "base/process_util.h"
-#include "base/threading/platform_thread.h"
 #include "chrome/common/nacl_cmd_line.h"
+#include "chrome/common/nacl_debug_exception_handler_win.h"
 #include "chrome/common/nacl_messages.h"
 #include "content/common/sandbox_policy.h"
 #include "content/public/common/content_switches.h"
 #include "ipc/ipc_switches.h"
-#include "native_client/src/trusted/service_runtime/win/debug_exception_handler.h"
 
 namespace {
 
 void SendReply(IPC::Channel* channel, int32 pid) {
   channel->Send(new NaClProcessMsg_DebugExceptionHandlerLaunched(pid));
 }
 
-class DebugExceptionHandler : public base::PlatformThread::Delegate {
- public:
-  DebugExceptionHandler(base::MessageLoopProxy* message_loop,
-                        IPC::Channel* channel, int32 pid)
-      : message_loop_(message_loop), channel_(channel), pid_(pid) {
-  }
-
-  virtual void ThreadMain() OVERRIDE {
-    // In the Windows API, the set of processes being debugged is
-    // thread-local, so we have to attach to the process (using
-    // DebugActiveProcess()) on the same thread on which
-    // NaClDebugLoop() receives debug events for the process.
-    BOOL attached = false;
-    base::ProcessHandle process_handle = base::kNullProcessHandle;
-    if (!base::OpenProcessHandleWithAccess(
-             pid_,
-             base::kProcessAccessQueryInformation |
-             base::kProcessAccessSuspendResume |
-             base::kProcessAccessTerminate |
-             base::kProcessAccessVMOperation |
-             base::kProcessAccessVMRead |
-             base::kProcessAccessVMWrite |
-             base::kProcessAccessWaitForTermination,
-             &process_handle)) {
-      LOG(ERROR) << "Failed to get process handle";
-    } else {
-      attached = DebugActiveProcess(pid_);
-      if (!attached) {
-        LOG(ERROR) << "Failed to connect to the process";
-      }
-    }
-    // At the moment we do not say in the reply whether attaching as a
-    // debugger succeeded.  In the future, when we attach on demand
-    // when an exception handler is first registered, we can make the
-    // NaCl syscall indicate whether attaching succeeded.
-    message_loop_->PostDelayedTask(FROM_HERE,
-        base::Bind(SendReply, channel_, pid_), base::TimeDelta());
-
-    if (attached) {
-      DWORD exit_code;
-      NaClDebugLoop(process_handle, &exit_code);
-    }
-    if (process_handle != base::kNullProcessHandle) {
-      base::CloseProcessHandle(process_handle);
-    }
-    delete this;
-  }
-
- private:
-  base::MessageLoopProxy* message_loop_;
-  IPC::Channel* channel_;
-  int32 pid_;
-
-  DISALLOW_COPY_AND_ASSIGN(DebugExceptionHandler);
-};
-
 }  // namespace
 
 NaClBrokerListener::NaClBrokerListener()
     : browser_handle_(base::kNullProcessHandle) {
 }
 
 NaClBrokerListener::~NaClBrokerListener() {
   base::CloseProcessHandle(browser_handle_);
 }
 
@@ skipping 55 matching lines @@
           browser_handle_, &loader_handle_in_browser,
           PROCESS_DUP_HANDLE | PROCESS_QUERY_INFORMATION , FALSE, 0);
       base::CloseProcessHandle(loader_process);
     }
   }
   channel_->Send(new NaClProcessMsg_LoaderLaunched(loader_channel_id,
                                                    loader_handle_in_browser));
 }
 
 void NaClBrokerListener::OnLaunchDebugExceptionHandler(int32 pid) {
-  // The new PlatformThread will take ownership of the
-  // DebugExceptionHandler object, which will delete itself on exit.
-  DebugExceptionHandler* handler = new DebugExceptionHandler(
-      base::MessageLoopProxy::current(), channel_.get(), pid);
-  if (!base::PlatformThread::CreateNonJoinable(0, handler)) {
-    SendReply(channel_.get(), pid);
-    delete handler;
-  }
+  base::Closure reply_sender(base::Bind(SendReply, channel_.get(), pid));
+  NaClStartDebugExceptionHandlerThread(pid, base::MessageLoopProxy::current(),
+                                       reply_sender);
 }
 
 void NaClBrokerListener::OnStopBroker() {
   MessageLoop::current()->Quit();
 }