Add support for --debug switch.

atom/browser/node_debugger.cc

@@ -0,0 +1,69 @@
+// Copyright (c) 2014 GitHub, Inc. All rights reserved.
+// Use of this source code is governed by the MIT license that can be
+// found in the LICENSE file.
+
+#include "atom/browser/node_debugger.h"
+
+#include "atom/common/atom_version.h"
+#include "base/command_line.h"
+#include "base/strings/string_number_conversions.h"
+#include "v8/include/v8.h"
+#include "v8/include/v8-debug.h"
+
+#include "atom/common/node_includes.h"
+
+namespace atom {
+
+// static
+uv_async_t NodeDebugger::dispatch_debug_messages_async_;
+
+NodeDebugger::NodeDebugger() {
+  uv_async_init(uv_default_loop(),
+                &dispatch_debug_messages_async_,
+                DispatchDebugMessagesInMainThread);
+  uv_unref(reinterpret_cast<uv_handle_t*>(&dispatch_debug_messages_async_));
+
+  bool use_debug_agent = false;
+  int port = 5858;
+  bool wait_for_connection = false;
+
+  std::string port_str;
+  base::CommandLine* cmd = base::CommandLine::ForCurrentProcess();
+  if (cmd->HasSwitch("debug")) {
+    use_debug_agent = true;
+    port_str = cmd->GetSwitchValueASCII("debug");
+  }
+  if (cmd->HasSwitch("debug-brk")) {
+    use_debug_agent = true;
+    wait_for_connection = true;
+    port_str = cmd->GetSwitchValueASCII("debug-brk");
+  }
+
+  if (use_debug_agent) {
+    if (!port_str.empty())
+      base::StringToInt(port_str, &port);
+    v8::Debug::EnableAgent("atom-shell " ATOM_VERSION, port,
+                           wait_for_connection);
+    v8::Debug::SetDebugMessageDispatchHandler(DispatchDebugMessagesInMsgThread,
+                                              false);
+  }
+}
+
+NodeDebugger::~NodeDebugger() {
+}
+
+// static
+void NodeDebugger::DispatchDebugMessagesInMainThread(uv_async_t* handle) {
+  if (!global_env)
+    return;
+
+  v8::Isolate::Scope isolate_scope(global_env->isolate());
+  v8::Debug::ProcessDebugMessages();
+}
+
+// static
+void NodeDebugger::DispatchDebugMessagesInMsgThread() {
+  uv_async_send(&dispatch_debug_messages_async_);
+}
+
+}  // namespace atom