Integrate acct(2) testcase in as tests/sys/kern/acct/acct_test

The :encode_tv_random_million testcase fails the epsilon tests a few thousand
times out of one million, so expect the testcase to fail

MFC after: 1 week
Submitted by: keramida
Sponsored by: EMC / Isilon Storage Division

etc/mtree/BSD.tests.dist

@@ -373,6 +373,8 @@
         file
         ..
         kern
+            acct
+            ..
             execve
             ..
         ..

tests/sys/kern/Makefile

@@ -13,6 +13,7 @@ LDADD.unix_seqpacket_test+=		-lpthread
 
 WARNS?=	5
 
+TESTS_SUBDIRS+=	acct
 TESTS_SUBDIRS+=	execve
 
 .include <bsd.test.mk>

tests/sys/kern/acct/Makefile

@@ -0,0 +1,17 @@
+# $FreeBSD$
+
+TESTSDIR=	${TESTSBASE}/sys/kern/acct
+
+ATF_TESTS_C=	acct_test
+
+CFLAGS+=	-I${.OBJDIR}
+
+CLEANFILES+=	convert.c
+
+DPSRCS.acct_test=	convert.c
+
+convert.c: ${SRCTOP}/sys/kern/kern_acct.c
+	sed -n -e 's/log(/syslog(/g' \
+	       -e '/FLOAT_CONVERSION_START/,/FLOAT_CONVERSION_END/p' ${.ALLSRC} >>${.TARGET}
+
+.include <bsd.test.mk>

tests/sys/kern/acct/acct_test.c

@@ -0,0 +1,237 @@
+/*-
+ * Copyright (c) 2011 Giorgos Keramidas. All rights reserved.
+ * Copyright (c) 2007 Diomidis Spinellis. 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 AUTHOR 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 AUTHOR 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 <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/types.h>
+
+#include <assert.h>
+#include <errno.h>
+#include <float.h>
+#include <limits.h>
+#include <math.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <strings.h>
+#include <syslog.h>
+#include <time.h>
+
+#include <atf-c.h>
+
+#define KASSERT(val, msg) assert(val)
+
+typedef u_int32_t comp_t;
+
+#define AHZ 1000000
+
+#include "convert.c"
+
+union cf {
+	comp_t c;
+	float f;
+};
+
+static void
+check_result(const char *name, float expected, union cf v)
+{
+	double eps;
+
+	eps = fabs(expected - v.f) / expected;
+	ATF_CHECK(eps <= FLT_EPSILON);
+	if (eps > FLT_EPSILON) {
+		printf("Error in %s\n", name);
+		printf("Got      0x%08x %12g\n", v.c, v.f);
+		v.f = expected;
+		printf("Expected 0x%08x %12g (%.15lg)\n", v.c, v.f, expected);
+		printf("Epsilon=%lg, rather than %g\n", eps, FLT_EPSILON);
+	}
+}
+
+/*
+ * Test case for encoding {0 sec, 0 usec} within a reasonable epsilon.
+ */
+
+ATF_TC_WITHOUT_HEAD(encode_tv_zero);
+ATF_TC_BODY(encode_tv_zero, tc)
+{
+	union cf v;
+	struct timeval tv;
+
+	tv.tv_sec = 0;
+	tv.tv_usec = 0;
+	v.c = encode_timeval(tv);
+	ATF_CHECK(fabs(v.f - 0.0) < FLT_EPSILON);
+}
+
+/*
+ * Test case for encoding a random long number.
+ */
+
+ATF_TC_WITHOUT_HEAD(encode_long);
+ATF_TC_BODY(encode_long, tc)
+{
+	union cf v;
+	long l;
+
+	l = random();
+	v.c = encode_long(l);
+	check_result(atf_tc_get_ident(tc), l, v);
+}
+
+/*
+ * Test case for encoding a small number of seconds {1 sec, 0 usec}.
+ */
+
+ATF_TC_WITHOUT_HEAD(encode_tv_only_sec);
+ATF_TC_BODY(encode_tv_only_sec, tc)
+{
+	union cf v;
+	struct timeval tv;
+
+	tv.tv_sec = 1;
+	tv.tv_usec = 0;
+	v.c = encode_timeval(tv);
+	check_result(atf_tc_get_ident(tc),
+	    (float)tv.tv_sec * AHZ + tv.tv_usec, v);
+}
+
+/*
+ * Test case for encoding a small number of usec {0 sec, 1 usec}.
+ */
+
+ATF_TC_WITHOUT_HEAD(encode_tv_only_usec);
+ATF_TC_BODY(encode_tv_only_usec, tc)
+{
+	union cf v;
+	struct timeval tv;
+
+	tv.tv_sec = 0;
+	tv.tv_usec = 1;
+	v.c = encode_timeval(tv);
+	check_result(atf_tc_get_ident(tc),
+	    (float)tv.tv_sec * AHZ + tv.tv_usec, v);
+}
+
+/*
+ * Test case for encoding a large number of usec {1 sec, 999.999 usec}.
+ */
+
+ATF_TC_WITHOUT_HEAD(encode_tv_many_usec);
+ATF_TC_BODY(encode_tv_many_usec, tc)
+{
+	union cf v;
+	struct timeval tv;
+
+	tv.tv_sec = 1;
+	tv.tv_usec = 999999L;
+	v.c = encode_timeval(tv);
+	check_result(atf_tc_get_ident(tc),
+	    (float)tv.tv_sec * AHZ + tv.tv_usec, v);
+}
+
+/*
+ * Test case for encoding a huge number of usec {1 sec, 1.000.000 usec} that
+ * overflows the usec counter and should show up as an increase in timeval's
+ * seconds instead.
+ */
+
+ATF_TC_WITHOUT_HEAD(encode_tv_usec_overflow);
+ATF_TC_BODY(encode_tv_usec_overflow, tc)
+{
+	union cf v;
+	struct timeval tv;
+
+	tv.tv_sec = 1;
+	tv.tv_usec = 1000000L;
+	v.c = encode_timeval(tv);
+	check_result(atf_tc_get_ident(tc),
+	    (float)tv.tv_sec * AHZ + tv.tv_usec, v);
+}
+
+/*
+ * Test case for encoding a very large number of seconds, one that is very
+ * near to the limit of 32-bit signed values.  With a usec value of 999.999
+ * microseconds this should result in the largest value we can represent with
+ * a timeval struct.
+ */
+
+ATF_TC_WITHOUT_HEAD(encode_tv_upper_limit);
+ATF_TC_BODY(encode_tv_upper_limit, tc)
+{
+	union cf v;
+	struct timeval tv;
+
+	tv.tv_sec = 2147483647L;
+	tv.tv_usec = 999999L;
+	v.c = encode_timeval(tv);
+	check_result(atf_tc_get_ident(tc),
+	    (float)tv.tv_sec * AHZ + tv.tv_usec, v);
+}
+
+/*
+ * Test case for encoding a million random timeval objects, and checking that
+ * the conversion does not diverge too much from the expected values.
+ */
+
+ATF_TC_WITHOUT_HEAD(encode_tv_random_million);
+ATF_TC_BODY(encode_tv_random_million, tc)
+{
+	union cf v;
+	struct timeval tv;
+	long k;
+
+	atf_tc_expect_fail("the testcase violates FLT_EPSILON");
+
+	ATF_REQUIRE_MSG(unsetenv("TZ") == 0, "unsetting TZ failed; errno=%d", errno);
+
+	for (k = 1; k < 1000000L; k++) {
+		tv.tv_sec = random();
+		tv.tv_usec = (random() % 1000000L);
+		v.c = encode_timeval(tv);
+		check_result(atf_tc_get_ident(tc),
+		    (float)tv.tv_sec * AHZ + tv.tv_usec, v);
+	}
+}
+
+/* ---------------------------------------------------------------------
+ * Main.
+ * --------------------------------------------------------------------- */
+
+ATF_TP_ADD_TCS(tp)
+{
+
+	ATF_TP_ADD_TC(tp, encode_long);
+	ATF_TP_ADD_TC(tp, encode_tv_zero);
+	ATF_TP_ADD_TC(tp, encode_tv_only_sec);
+	ATF_TP_ADD_TC(tp, encode_tv_only_usec);
+	ATF_TP_ADD_TC(tp, encode_tv_many_usec);
+	ATF_TP_ADD_TC(tp, encode_tv_usec_overflow);
+	ATF_TP_ADD_TC(tp, encode_tv_upper_limit);
+	ATF_TP_ADD_TC(tp, encode_tv_random_million);
+
+	return atf_no_error();
+}