Add flags to control whether to set low level hooks and disable exceptions.

Author: zcbenz

src/node.cc

@@ -108,6 +108,11 @@ using v8::V8;
 using v8::Value;
 using v8::kExternalUint32Array;
 
+bool g_standalone_mode = true;
+bool g_upstream_node_mode = true;
+bool use_debug_agent = false;
+bool debug_wait_connect = false;
+
 static bool print_eval = false;
 static bool force_repl = false;
 static bool trace_deprecation = false;
@@ -116,8 +121,6 @@ static bool abort_on_uncaught_exception = false;
 static const char* eval_string = nullptr;
 static unsigned int preload_module_count = 0;
 static const char** preload_modules = nullptr;
-static bool use_debug_agent = false;
-static bool debug_wait_connect = false;
 static int debug_port = 5858;
 static bool v8_is_profiling = false;
 static bool node_is_initialized = false;
@@ -1089,6 +1092,7 @@ Handle<Value> MakeCallback(Environment* env,
   env->tick_callback_function()->Call(process, 0, nullptr);
   CHECK_EQ(env->context(), env->isolate()->GetCurrentContext());
 
+  if (!g_standalone_mode) try_catch.Reset();
   if (try_catch.HasCaught()) {
     return Undefined(env->isolate());
   }
@@ -1115,6 +1119,7 @@ Handle<Value> MakeCallback(Environment* env,
 
   tick_info->set_in_tick(false);
 
+  if (!g_standalone_mode) try_catch.Reset();
   if (try_catch.HasCaught()) {
     tick_info->set_last_threw(true);
     return Undefined(env->isolate());
@@ -2891,8 +2896,12 @@ static void RawDebug(const FunctionCallbackInfo<Value>& args) {
 void LoadEnvironment(Environment* env) {
   HandleScope handle_scope(env->isolate());
 
+  if (g_upstream_node_mode) {  // No indent to minimize diff.
   env->isolate()->SetFatalErrorHandler(node::OnFatalError);
+  }  // g_upstream_node_mode
+  if (g_standalone_mode) {  // No indent to minimize diff.
   env->isolate()->AddMessageListener(OnMessage);
+  }  // g_standalone_mode
 
   // Compile, execute the src/node.js file. (Which was included as static C
   // string in node_natives.h. 'natve_node' is the string containing that
@@ -3188,7 +3197,7 @@ static void DispatchMessagesDebugAgentCallback(Environment* env) {
 }
 
 
-static void StartDebug(Environment* env, bool wait) {
+void StartDebug(Environment* env, bool wait) {
   CHECK(!debugger_running);
 
   env->debugger_agent()->set_dispatch_handler(
@@ -3203,7 +3212,7 @@ static void StartDebug(Environment* env, bool wait) {
 
 
 // Called from the main thread.
-static void EnableDebug(Environment* env) {
+void EnableDebug(Environment* env) {
   CHECK(debugger_running);
 
   // Send message to enable debug in workers
@@ -3531,6 +3540,7 @@ void Init(int* argc,
   // Initialize prog_start_time to get relative uptime.
   prog_start_time = static_cast<double>(uv_now(uv_default_loop()));
 
+  if (g_upstream_node_mode) {  // No indent to minimize diff.
   // Make inherited handles noninheritable.
   uv_disable_stdio_inheritance();
 
@@ -3595,12 +3605,17 @@ void Init(int* argc,
     const char expose_debug_as[] = "--expose_debug_as=v8debug";
     V8::SetFlagsFromString(expose_debug_as, sizeof(expose_debug_as) - 1);
   }
+  }  // g_upstream_node_mode
 
+#if 0
   V8::SetArrayBufferAllocator(&ArrayBufferAllocator::the_singleton);
+#endif
 
+  if (g_upstream_node_mode) {  // No indent to minimize diff.
   if (!use_debug_agent) {
     RegisterDebugSignalHandler();
   }
+  }  // g_upstream_node_mode
 
   // We should set node_is_initialized here instead of in node::Start,
   // otherwise embedders using node::Init to initialize everything will not be

src/node.h

@@ -152,6 +152,13 @@ namespace node {
 
 NODE_EXTERN extern bool no_deprecation;
 
+// Whether node should open some low level hooks.
+NODE_EXTERN extern bool g_standalone_mode;
+NODE_EXTERN extern bool g_upstream_node_mode;
+// Expose the debug flags.
+NODE_EXTERN extern bool use_debug_agent;
+NODE_EXTERN extern bool debug_wait_connect;
+
 NODE_EXTERN int Start(int argc, char *argv[]);
 NODE_EXTERN void Init(int* argc,
                       const char** argv,
@@ -184,6 +191,9 @@ NODE_EXTERN void EmitBeforeExit(Environment* env);
 NODE_EXTERN int EmitExit(Environment* env);
 NODE_EXTERN void RunAtExit(Environment* env);
 
+NODE_EXTERN void StartDebug(Environment* env, bool wait);
+NODE_EXTERN void EnableDebug(Environment* env);
+
 /* Converts a unixtime to V8 Date */
 #define NODE_UNIXTIME_V8(t) v8::Date::New(v8::Isolate::GetCurrent(),          \
     1000 * static_cast<double>(t))