Fix some memory leaks in UV TCP code

src/core/lib/iomgr/resolve_address_uv.c

@@ -54,7 +54,7 @@ static int retry_named_port_failure(int status, request *r,
         int retry_status;
         uv_getaddrinfo_t *req = gpr_malloc(sizeof(uv_getaddrinfo_t));
         req->data = r;
-        r->port = svc[i][1];
+        r->port = gpr_strdup(svc[i][1]);
         retry_status = uv_getaddrinfo(uv_default_loop(), req, getaddrinfo_cb,
                                       r->host, r->port, r->hints);
         if (retry_status < 0 || getaddrinfo_cb == NULL) {
@@ -127,6 +127,8 @@ static void getaddrinfo_callback(uv_getaddrinfo_t *req, int status,
   GRPC_CLOSURE_SCHED(&exec_ctx, r->on_done, error);
   grpc_exec_ctx_finish(&exec_ctx);
   gpr_free(r->hints);
+  gpr_free(r->host);
+  gpr_free(r->port);
   gpr_free(r);
   uv_freeaddrinfo(res);
 }

src/core/lib/iomgr/tcp_client_uv.c

@@ -48,6 +48,7 @@ typedef struct grpc_uv_tcp_connect {
 static void uv_tcp_connect_cleanup(grpc_exec_ctx *exec_ctx,
                                    grpc_uv_tcp_connect *connect) {
   grpc_resource_quota_unref_internal(exec_ctx, connect->resource_quota);
+  gpr_free(connect->addr_name);
   gpr_free(connect);
 }
 
@@ -105,6 +106,7 @@ static void uv_tc_on_connect(uv_connect_t *req, int status) {
   }
   done = (--connect->refs == 0);
   if (done) {
+    grpc_exec_ctx_flush(&exec_ctx);
     uv_tcp_connect_cleanup(&exec_ctx, connect);
   }
   GRPC_CLOSURE_SCHED(&exec_ctx, closure, error);
@@ -140,6 +142,7 @@ static void tcp_client_connect_impl(grpc_exec_ctx *exec_ctx,
   connect->resource_quota = resource_quota;
   uv_tcp_init(uv_default_loop(), connect->tcp_handle);
   connect->connect_req.data = connect;
+  connect->refs = 1;
 
   if (GRPC_TRACER_ON(grpc_tcp_trace)) {
     gpr_log(GPR_DEBUG, "CLIENT_CONNECT: %s: asynchronously connecting",

src/core/lib/iomgr/tcp_server_uv.c

@@ -234,6 +234,7 @@ static void on_connect(uv_stream_t *server, int status) {
     sp->server->on_accept_cb(&exec_ctx, sp->server->on_accept_cb_arg, ep, NULL,
                              acceptor);
     grpc_exec_ctx_finish(&exec_ctx);
+    gpr_free(peer_name_string);
   }
 }
 

src/core/lib/iomgr/tcp_uv.c

@@ -67,6 +67,8 @@ typedef struct {
 static void tcp_free(grpc_exec_ctx *exec_ctx, grpc_tcp *tcp) {
   grpc_slice_unref_internal(exec_ctx, tcp->read_slice);
   grpc_resource_user_unref(exec_ctx, tcp->resource_user);
+  gpr_free(tcp->handle);
+  gpr_free(tcp->peer_string);
   gpr_free(tcp);
 }