1 files changed, 215 insertions, 0 deletions

diff --git a/src/regress/lib/libc/sys/t_clock_gettime.c b/src/regress/lib/libc/sys/t_clock_gettime.c
new file mode 100644
index 0000000000..206710799e
--- /dev/null
+++ b/src/regress/lib/libc/sys/t_clock_gettime.c
@@ -0,0 +1,215 @@
+/* $NetBSD: t_clock_gettime.c,v 1.3 2017/01/13 21:30:41 christos Exp $ */
+
+/*-
+ * Copyright (c) 2008 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Frank Kardel.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*-
+ * Copyright (c) 2006 Frank Kardel
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "macros.h"
+
+#include <sys/cdefs.h>
+__COPYRIGHT("@(#) Copyright (c) 2008\
+ The NetBSD Foundation, inc. All rights reserved.");
+__RCSID("$NetBSD: t_clock_gettime.c,v 1.3 2017/01/13 21:30:41 christos Exp $");
+
+#include <sys/param.h>
+#include <sys/sysctl.h>
+
+
+#include "atf-c.h"
+#include <errno.h>
+#include <limits.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
+
+#include "h_macros.h"
+
+#define MINPOSDIFF      15000000        /* 15 ms for now */
+#define TIMEOUT         5
+
+#define TC_HARDWARE     "kern.timecounter.hardware"
+#define TC_CHOICE       "kern.timecounter.choice"
+
+static void
+check_timecounter(void)
+{
+        struct timespec tsa, tsb, tsl, res;
+        long long mindiff = INTMAX_MAX;
+        time_t endlimit;
+
+#define CL(x) \
+        do { \
+                if ((x) != -1) \
+                        break; \
+                atf_tc_fail_nonfatal("%s: %s", #x, strerror(errno)); \
+                return; \
+        } while (0)
+
+        CL(clock_gettime(CLOCK_REALTIME, &tsa));
+        tsl = tsa;
+
+        CL(time(&endlimit));
+        endlimit += TIMEOUT + 1;
+
+        while ((time_t)tsa.tv_sec < endlimit) {
+                long long diff;
+
+                CL(clock_gettime(CLOCK_REALTIME, &tsb));
+                diff = 1000000000LL * (tsb.tv_sec - tsa.tv_sec)
+                    + tsb.tv_nsec - tsa.tv_nsec;
+
+                if (diff > 0 && mindiff > diff)
+                        mindiff = diff;
+
+                if (diff < 0 || diff > MINPOSDIFF) {
+                        long long elapsed;
+                        (void)printf("%stime TSA: 0x%jx.%08jx, TSB: 0x%jx.%08jx, "
+                            "diff = %lld nsec, ", (diff < 0) ? "BAD " : "",
+                            (uintmax_t)tsa.tv_sec, (uintmax_t)tsa.tv_nsec,
+                            (uintmax_t)tsb.tv_sec, (uintmax_t)tsb.tv_nsec, diff);
+
+                        elapsed = 1000000000LL * (tsb.tv_sec - tsl.tv_sec)
+                            + tsb.tv_nsec - tsl.tv_nsec;
+
+
+                        (void)printf("%lld nsec\n", elapsed);
+                        tsl = tsb;
+
+                        ATF_CHECK(diff >= 0);
+                        if (diff < 0)
+                                return;
+                }
+
+                tsa.tv_sec = tsb.tv_sec;
+                tsa.tv_nsec = tsb.tv_nsec;
+        }
+
+        if (clock_getres(CLOCK_REALTIME, &res) == 0) {
+                long long r = res.tv_sec * 1000000000 + res.tv_nsec;
+
+                (void)printf("Claimed resolution: %lld nsec (%f Hz) or "
+                    "better\n", r, 1.0 / r * 1e9);
+                (void)printf("Observed minimum non zero delta: %lld "
+                    "nsec\n", mindiff);
+        }
+
+#undef CL
+}
+
+ATF_TC(clock_gettime_real);
+ATF_TC_HEAD(clock_gettime_real, tc)
+{
+        atf_tc_set_md_var(tc, "require.user", "root");
+        atf_tc_set_md_var(tc, "descr",
+            "Checks the monotonicity of the CLOCK_REALTIME implementation");
+        atf_tc_set_md_var(tc, "timeout", "300");
+}
+
+ATF_TC_BODY(clock_gettime_real, tc)
+{
+        char name[128], cbuf[512], ctrbuf[10240];
+        size_t cbufsiz = sizeof(cbuf);
+        size_t ctrbufsiz = sizeof(ctrbuf);
+        const char *p;
+        char *save;
+        int quality, n;
+
+        if (sysctlbyname(TC_HARDWARE, cbuf, &cbufsiz, NULL, 0) != 0) {
+                (void)printf("\nChecking legacy time implementation "
+                    "for %d seconds\n", TIMEOUT);
+                check_timecounter();
+                return;
+                /* NOTREACHED */
+        }
+        (void)printf("%s = %s\n", TC_HARDWARE, cbuf);
+        REQUIRE_LIBC(save = strdup(cbuf), NULL);
+
+        RL(sysctlbyname(TC_CHOICE, ctrbuf, &ctrbufsiz, NULL, 0));
+        (void)printf("%s = %s\n", TC_CHOICE, ctrbuf);
+
+        for (p = ctrbuf, n = 0; sscanf(p, "%127[^(](q=%d, f=%*u Hz)%*[ ]%n",
+            name, &quality, &n) == 2; p += n) {
+                struct timespec ts;
+                int ret;
+
+                if (quality < 0)
+                        continue;
+
+                (void)printf("\nChecking %s for %d seconds\n", name, TIMEOUT);
+                CHECK_LIBC(ret = sysctlbyname(TC_HARDWARE, NULL, 0,
+                    name, strlen(name)), -1);
+                if (ret == -1)
+                        continue;
+
+                /* wait a bit to select new counter in clockinterrupt */
+                ts.tv_sec = 0;
+                ts.tv_nsec = 100000000;
+                (void)nanosleep(&ts, NULL);
+
+                check_timecounter();
+        }
+
+        RL(sysctlbyname(TC_HARDWARE, NULL, 0, save, strlen(save)));
+}
+
+ATF_TP_ADD_TCS(tp)
+{
+
+        ATF_TP_ADD_TC(tp, clock_gettime_real);
+
+        return atf_no_error();
+}