Add gettime() routine to test utils

Impending benchmark code will need a function to get current time
in seconds, and this patch introduces such routine. We try to use
the POSIX gettimeofday() function when available, and fall back to
clock() when not.

diff --git a/configure.ac b/configure.ac
index 47213a0..4b38abd 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -609,7 +609,7 @@ AC_SUBST(DEP_CFLAGS)
 AC_SUBST(DEP_LIBS)
 
 dnl =====================================
-dnl posix_memalign, sigaction, alarm
+dnl posix_memalign, sigaction, alarm, gettimeofday
 
 AC_CHECK_FUNC(posix_memalign, have_posix_memalign=yes, have_posix_memalign=no)
 if test x$have_posix_memalign = xyes; then
@@ -639,6 +639,12 @@ if test x$have_getpagesize = xyes; then
    AC_DEFINE(HAVE_GETPAGESIZE, 1, [Whether we have getpagesize()])
 fi
 
+AC_CHECK_FUNC(gettimeofday, have_gettimeofday=yes, have_gettimeofday=no)
+AC_CHECK_HEADER(sys/time.h, have_sys_time_h=yes, have_sys_time_h=no)
+if test x$have_gettimeofday = xyes && test x$have_sys_time_h = xyes; then
+   AC_DEFINE(HAVE_GETTIMEOFDAY, 1, [Whether we have gettimeofday()])
+fi
+
 dnl =====================================
 dnl Thread local storage
 

diff --git a/test/utils.c b/test/utils.c
index ccc637e..2cd763d 100644 (file)
--- a/test/utils.c
+++ b/test/utils.c
@@ -1,6 +1,12 @@
 #include "utils.h"
 #include <signal.h>
 
+#ifdef HAVE_GETTIMEOFDAY
+#include <sys/time.h>
+#else
+#include <time.h>
+#endif
+
 #ifdef HAVE_UNISTD_H
 #include <unistd.h>
 #endif
@@ -431,6 +437,20 @@ fuzzer_test_main (const char *test_name,
     return 0;
 }
 
+/* Try to obtain current time in seconds */
+double
+gettime (void)
+{
+#ifdef HAVE_GETTIMEOFDAY
+    struct timeval tv;
+
+    gettimeofday (&tv, NULL);
+    return (double)((int64_t)tv.tv_sec * 1000000 + tv.tv_usec) / 1000000.;
+#else
+    return (double)clock() / (double)CLOCKS_PER_SEC;
+#endif
+}
+
 static const char *global_msg;
 
 static void

diff --git a/test/utils.h b/test/utils.h
index 06cd857..e7920f0 100644 (file)
--- a/test/utils.h
+++ b/test/utils.h
@@ -64,6 +64,10 @@ fence_free (void *data);
 uint8_t *
 make_random_bytes (int n_bytes);
 
+/* Return current time in seconds */
+double
+gettime (void);
+
 /* main body of the fuzzer test */
 int
 fuzzer_test_main (const char *test_name,