Fix several memory leaks in the unit tests.

Also add a comment to buffer.c about why we call
evbuffer_file_segment_free on failure to add the segment.

buffer.c

@@ -3203,7 +3203,7 @@ evbuffer_add_file_segment(struct evbuffer *buf,
 	return 0;
 err:
 	EVBUFFER_UNLOCK(buf);
-	evbuffer_file_segment_free(seg);
+	evbuffer_file_segment_free(seg); /* Lowers the refcount */
 	return -1;
 }
 

test/regress.c

@@ -1673,7 +1673,7 @@ static void
 test_active_later(void *ptr)
 {
 	struct basic_test_data *data = ptr;
-	struct event *ev1, *ev2;
+	struct event *ev1 = NULL, *ev2 = NULL;
 	struct event ev3, ev4;
 	struct timeval qsec = {0, 100000};
 	ev1 = event_new(data->base, data->pair[0], EV_READ|EV_PERSIST, read_and_drain_cb, NULL);
@@ -1708,10 +1708,15 @@ test_active_later(void *ptr)
 	 * it. */
 	event_active_later_(&ev3, EV_READ);
 	event_base_assert_ok_(data->base);
+
+end:
+	if (ev1)
+		event_free(ev1);
+	if (ev2)
+		event_free(ev2);
+
 	event_base_free(data->base);
 	data->base = NULL;
-end:
-	;
 }
 
 

test/regress_buffer.c

@@ -819,7 +819,6 @@ test_evbuffer_add_file(void *ptr)
 	if (use_segment) {
 		tt_assert(evbuffer_add_file_segment(src, seg,
 			segment_offset, segment_len)!=-1);
-		seg = NULL; /* Avoid double-free */
 	} else {
 		tt_assert(evbuffer_add_file(src, fd, starting_offset,
 			mapping_len) != -1);
@@ -864,6 +863,10 @@ test_evbuffer_add_file(void *ptr)
 		evutil_closesocket(pair[0]);
 	if (pair[1] >= 0)
 		evutil_closesocket(pair[1]);
+	if (wev)
+		event_free(wev);
+	if (rev)
+		event_free(rev);
 	if (tmpfilename) {
 		unlink(tmpfilename);
 		free(tmpfilename);

test/regress_dns.c

@@ -870,8 +870,12 @@ dns_inflight_test_impl(void *arg, int flags)
 end:
 	if (dns)
 		evdns_base_free(dns, 0);
-	if (exit_port)
+	if (exit_port) {
 		evdns_close_server_port(exit_port);
+		exit_port = NULL;
+	} else if (! disable_when_inactive) {
+		evdns_close_server_port(dns_port);
+	}
 }
 
 static void
@@ -1861,6 +1865,7 @@ dbg_leak_resume(void *env_, int cancel, int send_err_shutdown)
 end:
 	evdns_base_free(env->dns_base, send_err_shutdown);
 	env->dns_base = 0;
+
 	event_base_free(env->base);
 	env->base = 0;
 }

test/regress_http.c

@@ -399,7 +399,7 @@ http_basic_test(void *arg)
 {
 	struct basic_test_data *data = arg;
 	struct timeval tv;
-	struct bufferevent *bev;
+	struct bufferevent *bev = NULL;
 	evutil_socket_t fd;
 	const char *http_request;
 	ev_uint16_t port = 0, port2 = 0;
@@ -484,7 +484,8 @@ http_basic_test(void *arg)
 
 	evhttp_free(http);
  end:
-	;
+	if (bev)
+		bufferevent_free(bev);
 }
 
 

test/regress_ssl.c

@@ -194,6 +194,7 @@ respond_to_number(struct bufferevent *bev, void *ctx)
 	n = atoi(line);
 	if (n <= 0)
 		TT_FAIL(("Bad number: %s", line));
+	free(line);
 	TT_BLATHER(("The number was %d", n));
 	if (n == 1001) {
 		++test_is_done;

test/regress_thread.c

@@ -382,7 +382,8 @@ thread_conditions_simple(void *arg)
 	tt_int_op(n_signal, ==, 1);
 
 end:
-	;
+	EVTHREAD_FREE_LOCK(cond.lock, EVTHREAD_LOCKTYPE_RECURSIVE);
+	EVTHREAD_FREE_COND(cond.cond);
 }
 
 #define CB_COUNT 128