[Pkg-gnupg-commit] [gnupg2] 13/20: agent: Use clock or clock_gettime for calibration.
Daniel Kahn Gillmor
dkg at fifthhorseman.net
Fri Dec 1 01:51:50 UTC 2017
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dkg pushed a commit to branch master
in repository gnupg2.
commit 760aa8aadafb747f33a1461ab0c2570b5ae43716
Author: NIIBE Yutaka <gniibe at fsij.org>
Date: Tue Nov 7 10:49:36 2017 +0900
agent: Use clock or clock_gettime for calibration.
* agent/protect.c (calibrate_get_time): Use clock or clock_gettime.
--
For calibration, clock(3) is better than times(3) among UNIXen.
Tested on NetBSD 7.1 and FreeBSD 11.1, using QEMU.
Thanks to Damien Goutte-Gattat for the information of use of
CLOCKS_PER_SEC; The old code with times(3) is not 100% correct,
in terms of POSIX. It should have used sysconf (_SC_CLK_TCK) instead
of CLOCKS_PER_SEC. CLOCKS_PER_SEC is specifically for clock(3).
GnuPG-bug-id: 3056, 3276, 3472
Signed-off-by: NIIBE Yutaka <gniibe at fsij.org>
(cherry picked from commit 380bce13d94ff03c96e39ac1d834f382c5c730a1)
---
agent/protect.c | 14 +++++++++-----
agent/t-protect.c | 2 +-
2 files changed, 10 insertions(+), 6 deletions(-)
diff --git a/agent/protect.c b/agent/protect.c
index 3073fc4..9bb2da6 100644
--- a/agent/protect.c
+++ b/agent/protect.c
@@ -23,6 +23,7 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
+#include <time.h>
#include <ctype.h>
#include <assert.h>
#include <unistd.h>
@@ -104,11 +105,14 @@ calibrate_get_time (struct calibrate_time_s *data)
&data->creation_time, &data->exit_time,
&data->kernel_time, &data->user_time);
# endif
-#else
- struct tms tmp;
+#elif defined (CLOCK_THREAD_CPUTIME_ID)
+ struct timespec tmp;
- times (&tmp);
- data->ticks = tmp.tms_utime;
+ clock_gettime (CLOCK_THREAD_CPUTIME_ID, &tmp);
+ data->ticks = (clock_t)(((unsigned long long)tmp.tv_sec * 1000000000 +
+ tmp.tv_nsec) * CLOCKS_PER_SEC / 1000000000);
+#else
+ data->ticks = clock ();
#endif
}
@@ -135,7 +139,7 @@ calibrate_elapsed_time (struct calibrate_time_s *starttime)
}
#else
return (unsigned long)((((double) (stoptime.ticks - starttime->ticks))
- /CLOCKS_PER_SEC)*10000000);
+ /CLOCKS_PER_SEC)*1000);
#endif
}
diff --git a/agent/t-protect.c b/agent/t-protect.c
index 1d3c8ec..92d312c 100644
--- a/agent/t-protect.c
+++ b/agent/t-protect.c
@@ -322,9 +322,9 @@ test_agent_protect_shared_secret (void)
int
main (int argc, char **argv)
{
- (void)argc;
(void)argv;
+ opt.verbose = argc - 1; /* We can do "./t-protect -v -v" */
gcry_control (GCRYCTL_DISABLE_SECMEM);
test_agent_protect ();
--
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