inspector: fix Coverity defects

One defect remains - Coverity believes that a session object is never
freed while in reality its lifespan is tied to a libuv socket.

PR-URL: https://github.com/nodejs/node/pull/10240
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Ali Ijaz Sheikh <ofrobots@google.com>

src/inspector_socket_server.cc

@@ -210,6 +210,7 @@ InspectorSocketServer::InspectorSocketServer(SocketServerDelegate* delegate,
                                              int port) : loop_(nullptr),
                                                          delegate_(delegate),
                                                          port_(port),
+                                                         server_(uv_tcp_t()),
                                                          closer_(nullptr),
                                                          next_session_id_(0) { }
 
@@ -400,6 +401,7 @@ void InspectorSocketServer::SocketConnectedCallback(uv_stream_t* server,
                                                     int status) {
   if (status == 0) {
     InspectorSocketServer* socket_server = InspectorSocketServer::From(server);
+    // Memory is freed when the socket closes.
     SocketSession* session =
         new SocketSession(socket_server, socket_server->next_session_id_++);
     if (inspector_accept(server, session->Socket(), HandshakeCallback) != 0) {

test/cctest/test_inspector_socket.cc

@@ -370,13 +370,13 @@ class InspectorSocketTest : public ::testing::Test {
     uv_tcp_init(&loop, &client_socket);
     uv_ip4_addr("127.0.0.1", PORT, &addr);
     uv_tcp_bind(&server, reinterpret_cast<const struct sockaddr*>(&addr), 0);
-    int err = uv_listen(reinterpret_cast<uv_stream_t*>(&server),
-                        1, on_new_connection);
-    GTEST_ASSERT_EQ(0, err);
+    GTEST_ASSERT_EQ(0, uv_listen(reinterpret_cast<uv_stream_t*>(&server),
+                                 1, on_new_connection));
     uv_connect_t connect;
     connect.data = nullptr;
-    uv_tcp_connect(&connect, &client_socket,
-                   reinterpret_cast<const sockaddr*>(&addr), on_connection);
+    GTEST_ASSERT_EQ(0, uv_tcp_connect(&connect, &client_socket,
+                                      reinterpret_cast<const sockaddr*>(&addr),
+                                      on_connection));
     uv_tcp_nodelay(&client_socket, 1);  // The buffering messes up the test
     SPIN_WHILE(!connect.data || !connected);
     really_close(reinterpret_cast<uv_handle_t*>(&server));

test/cctest/test_inspector_socket_server.cc

@@ -86,7 +86,8 @@ class TestInspectorServerDelegate : public SocketServerDelegate {
  public:
   TestInspectorServerDelegate() : connected(0), disconnected(0),
                                   targets_({ MAIN_TARGET_ID,
-                                             UNCONNECTABLE_TARGET_ID }) {}
+                                             UNCONNECTABLE_TARGET_ID }),
+                                  session_id_(0) {}
 
   void Connect(InspectorSocketServer* server) {
     server_ = server;
@@ -152,6 +153,7 @@ class SocketWrapper {
   explicit SocketWrapper(uv_loop_t* loop) : closed_(false),
                                             eof_(false),
                                             loop_(loop),
+                                            socket_(uv_tcp_t()),
                                             connected_(false),
                                             sending_(false) { }