diff --git a/iOS/Pod/Classes/Engine/DoricJSRemoteExecutor.h b/iOS/Pod/Classes/Engine/DoricJSRemoteExecutor.h
index e626791e..b9145867 100644
--- a/iOS/Pod/Classes/Engine/DoricJSRemoteExecutor.h
+++ b/iOS/Pod/Classes/Engine/DoricJSRemoteExecutor.h
@@ -29,6 +29,7 @@ NS_ASSUME_NONNULL_BEGIN
 
 @property(nonatomic, strong) dispatch_semaphore_t semaphore;
 
+- (void)close;
 @end
 
 NS_ASSUME_NONNULL_END
diff --git a/iOS/Pod/Classes/Engine/DoricJSRemoteExecutor.m b/iOS/Pod/Classes/Engine/DoricJSRemoteExecutor.m
index bd085a2f..57fbe9c2 100644
--- a/iOS/Pod/Classes/Engine/DoricJSRemoteExecutor.m
+++ b/iOS/Pod/Classes/Engine/DoricJSRemoteExecutor.m
@@ -26,8 +26,9 @@
 static NSString * const kUrlStr = @"ws://192.168.24.240:2080";
 
 @interface DoricJSRemoteExecutor () <SRWebSocketDelegate>
-@property(nonatomic, strong) NSMapTable *mapTable;
 @property(nonatomic, strong) SRWebSocket *websocket;
+@property(nonatomic, strong) NSMapTable *mapTable;
+@property(nonatomic, strong) dispatch_semaphore_t mapTableLock;
 @end
 
 @implementation DoricJSRemoteExecutor
@@ -35,14 +36,15 @@ - (instancetype)init {
     if (self = [super init]) {
         [self websocket];
         _semaphore = dispatch_semaphore_create(0);
-        dispatch_semaphore_wait(_semaphore, DISPATCH_TIME_FOREVER);
+        _mapTableLock = dispatch_semaphore_create(1);
+        DC_LOCK(self.semaphore);
     }
     return self;
 }
 
 - (void)webSocketDidOpen:(SRWebSocket *)webSocket {
     DoricLog(@"debugger webSocketDidOpen");
-    dispatch_semaphore_signal(_semaphore);
+    DC_UNLOCK(self.semaphore);
 }
 
 - (void)webSocket:(SRWebSocket *)webSocket didReceivePong:(NSData *)pongPayload {
@@ -64,7 +66,7 @@ - (void)webSocket:(SRWebSocket *)webSocket didReceiveMessage:(id)message {
 
 - (void)webSocket:(SRWebSocket *)webSocket didFailWithError:(NSError *)error {
     DoricLog(@"debugger webSocketdidFailWithError");
-    dispatch_semaphore_signal(_semaphore);
+    DC_UNLOCK(self.semaphore);
 }
 
 - (void)webSocket:(SRWebSocket *)webSocket didCloseWithCode:(NSInteger)code reason:(NSString *)reason wasClean:(BOOL)wasClean {
@@ -77,7 +79,20 @@ - (NSString *)loadJSScript:(NSString *)script source:(NSString *)source {
 }
 
 - (void)injectGlobalJSObject:(NSString *)name obj:(id)obj {
+    DC_LOCK(self.mapTableLock);
+    [self.mapTable setObject:obj forKey:name];
+    DC_UNLOCK(self.mapTableLock);
     
+    NSDictionary *jsonDic =@{
+        @"cmd": @"injectGlobalJSFunction",
+        @"name": name
+    };
+    NSError * err;
+    NSData * jsonData = [NSJSONSerialization dataWithJSONObject:jsonDic options:0 error:&err];
+    if (err) {
+        DoricLog(@"debugger ", NSStringFromSelector(_cmd), @" failed");
+    }
+    [self.websocket send:jsonData];
 }
 
 - (JSValue *)invokeObject:(NSString *)objName method:(NSString *)funcName args:(NSArray *)args {
@@ -105,11 +120,15 @@ - (JSValue *)invokeObject:(NSString *)objName method:(NSString *)funcName args:(
     }
     
     [self.websocket send:jsonData];
-    dispatch_semaphore_wait(_semaphore, DISPATCH_TIME_FOREVER);
+    DC_LOCK(self.semaphore);
     
     return nil;
 }
 
+- (void)close {
+    [self.websocket close];
+}
+
 #pragma mark - Properties
 - (SRWebSocket *)websocket {
     if (!_websocket) {
@@ -123,7 +142,7 @@ - (SRWebSocket *)websocket {
 
 - (NSMapTable *)mapTable {
     if (!_mapTable) {
-        _mapTable = [NSMapTable new];
+        _mapTable = [[NSMapTable alloc] initWithKeyOptions:NSPointerFunctionsStrongMemory valueOptions:NSPointerFunctionsWeakMemory capacity:0];
     }
     return _mapTable;
 }
diff --git a/iOS/Pod/Classes/Util/DoricUtil.h b/iOS/Pod/Classes/Util/DoricUtil.h
index dba4e355..ae606cc9 100644
--- a/iOS/Pod/Classes/Util/DoricUtil.h
+++ b/iOS/Pod/Classes/Util/DoricUtil.h
@@ -27,3 +27,11 @@ void DoricLog(NSString *_Nonnull format, ...);
 UIColor *_Nonnull DoricColor(NSNumber *_Nonnull number);
 
 NSBundle *DoricBundle();
+
+#ifndef DC_LOCK
+#define DC_LOCK(lock) dispatch_semaphore_wait(lock, DISPATCH_TIME_FOREVER);
+#endif
+
+#ifndef DC_UNLOCK
+#define DC_UNLOCK(lock) dispatch_semaphore_signal(lock);
+#endif