[debugger enhance] don't block gdbserver thread while executing (#989)

Allow to set break point again when all break points are removed and
wasm app starts running.

core/shared/platform/common/posix/posix_socket.c

@@ -71,6 +71,22 @@ fail:
     return BHT_ERROR;
 }
 
+int
+os_socket_settimeout(bh_socket_t socket, uint64 timeout_us)
+{
+    struct timeval tv;
+    tv.tv_sec = timeout_us / 1000000UL;
+    tv.tv_usec = timeout_us % 1000000UL;
+
+    if (setsockopt(socket, SOL_SOCKET, SO_RCVTIMEO, (const char *)&tv,
+                   sizeof(tv))
+        != 0) {
+        return BHT_ERROR;
+    }
+
+    return BHT_OK;
+}
+
 int
 os_socket_listen(bh_socket_t socket, int max_client)
 {

core/shared/platform/include/platform_api_extension.h

@@ -226,6 +226,17 @@ os_socket_create(bh_socket_t *sock, int tcp_or_udp);
 int
 os_socket_bind(bh_socket_t socket, const char *addr, int *port);
 
+/**
+ * Set timeout for the given socket
+ *
+ * @param socket the socket to set timeout
+ * @param timeout_us timeout in microseconds
+ *
+ * @return 0 if success, -1 otherwise
+ */
+int
+os_socket_settimeout(bh_socket_t socket, uint64 timeout_us);
+
 /**
  * Make the socket as a passive socket to accept incoming connection requests
  *

core/shared/platform/windows/win_socket.c

@@ -85,6 +85,20 @@ fail:
     return BHT_ERROR;
 }
 
+int
+os_socket_settimeout(bh_socket_t socket, uint64 timeout_us)
+{
+    DWORD tv = (DWORD)(timeout_us / 1000UL);
+
+    if (setsockopt(socket, SOL_SOCKET, SO_RCVTIMEO, (const char *)&tv,
+                   sizeof(tv))
+        != 0) {
+        return BHT_ERROR;
+    }
+
+    return BHT_OK;
+}
+
 int
 os_socket_listen(bh_socket_t socket, int max_client)
 {