Fix: test flaky sleep and wait patterns

[lttng-tools.git] / tests / utils / testapp / gen-ust-events / gen-ust-events.c

diff --git a/tests/utils/testapp/gen-ust-events/gen-ust-events.c b/tests/utils/testapp/gen-ust-events/gen-ust-events.c
index edf40eee42a1c3dcbf224adb2f08e0720a6040d4..3be0f0f1130958769e8d9298a1945fd441af6742 100644 (file)
--- a/tests/utils/testapp/gen-ust-events/gen-ust-events.c
+++ b/tests/utils/testapp/gen-ust-events/gen-ust-events.c
@@ -15,7 +15,10 @@
  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
  */
 
+#define _LGPL_SOURCE
+#include <assert.h>
 #include <arpa/inet.h>
+#include <fcntl.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -24,33 +27,67 @@
 #include <sys/stat.h>
 #include <sys/types.h>
 #include <unistd.h>
+#include <stdbool.h>
 
 #define TRACEPOINT_DEFINE
 #include "tp.h"
 
+void create_file(const char *path)
+{
+       int ret;
+
+       assert(path);
+
+       ret = creat(path, S_IRWXU);
+       if (ret < 0) {
+               fprintf(stderr, "Failed to create file %s\n", path);
+               return;
+       }
+
+       (void) close(ret);
+}
+
 int main(int argc, char **argv)
 {
-       int i, netint;
+       unsigned int i, netint;
        long values[] = { 1, 2, 3 };
        char text[10] = "test";
        double dbl = 2.0;
        float flt = 2222.0;
-       unsigned int nr_iter = 100;
+       int nr_iter = 100;
        useconds_t nr_usec = 0;
+       char *tmp_file_path = NULL;
+       bool file_created = false;
 
        if (argc >= 2) {
+               /*
+                * If nr_iter is negative, do an infinite tracing loop.
+                */
                nr_iter = atoi(argv[1]);
        }
 
-       if (argc == 3) {
+       if (argc >= 3) {
                /* By default, don't wait unless user specifies. */
                nr_usec = atoi(argv[2]);
        }
 
-       for (i = 0; i < nr_iter; i++) {
+       if (argc >= 4) {
+               tmp_file_path = argv[3];
+       }
+
+       for (i = 0; nr_iter < 0 || i < nr_iter; i++) {
                netint = htonl(i);
-               tracepoint(tp, tptest, i, netint, values, text, strlen(text),
-                          dbl, flt);
+               tracepoint(tp, tptest, i, netint, values, text, strlen(text), dbl,
+                               flt);
+
+               /*
+                * First loop we create the file if asked to indicate that at least one
+                * tracepoint has been hit.
+                */
+               if (!file_created && tmp_file_path) {
+                       create_file(tmp_file_path);
+                       file_created = true;
+               }
                usleep(nr_usec);
        }