1/*	$NetBSD: t_kern.c,v 1.6 2020/08/28 19:29:58 martin Exp $	*/
2
3/*-
4 * Copyright (c) 2011 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND
17 * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
18 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY
21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
23 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
25 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
26 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
27 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30#include <sys/types.h>
31#include <sys/signal.h>
32#include <sys/wait.h>
33
34#include <rump/rump.h>
35
36#include <atf-c.h>
37#include <stdio.h>
38#include <stdlib.h>
39#include <unistd.h>
40#include <regex.h>
41
42#include "h_macros.h"
43#include "../kernspace/kernspace.h"
44
45#define LOCKFUN(_name_, _descr_,_needld_, _expect_)			\
46	ATF_TC(lockme_##_name_);					\
47	ATF_TC_HEAD(lockme_##_name_, tc) {				\
48		atf_tc_set_md_var(tc, "descr", _descr_);		\
49	}								\
50	ATF_TC_BODY(lockme_##_name_, tc) {				\
51		locktest(tc, LOCKME_##_name_, _needld_, _expect_);	\
52	}
53
54static void
55locktest(const atf_tc_t *tc, enum locktest lt, int needld, const char *expect)
56{
57	extern const int rump_lockdebug;
58	int pipetti[2];
59	int status;
60	ssize_t len;
61	regex_t preg;
62
63	if (needld && !rump_lockdebug)
64		atf_tc_skip("test requires LOCKDEBUG kernel");
65	RL(pipe(pipetti));
66
67	switch (fork()) {
68	case 0:
69		RL(dup2(pipetti[1], STDOUT_FILENO));
70		RL(dup2(pipetti[1], STDOUT_FILENO));
71		rump_init();
72		rump_schedule();
73		rumptest_lockme(lt);
74		rump_unschedule();
75		break;
76	default:
77		RL(wait(&status));
78		ATF_REQUIRE(WIFSIGNALED(status) && WTERMSIG(status) == SIGABRT);
79		if (rump_lockdebug) {
80			char buf[8192];
81
82			len = read(pipetti[0], buf, sizeof(buf) - 1);
83			ATF_REQUIRE(len > 0);
84			buf[len] = '\0';
85			/*
86			 * We use regex matching here, since the rump
87			 * kernel messages include routine names and line
88			 * numbers which may not remain constant.
89			 */
90			if ((status = regcomp(&preg, expect, REG_BASIC)) != 0) {
91				regerror(status, &preg, buf, sizeof(buf));
92				printf("regcomp error: %s\n", buf);
93				atf_tc_fail("regcomp failed");
94			}
95			if ((status = regexec(&preg, buf, 0, NULL, 0)) != 0) {
96				printf("expected: \"%s\"\n", expect);
97				printf("received: \"%s\"\n", buf);
98				regerror(status, &preg, buf, sizeof(buf));
99				printf("regexec error: %s\n", buf);
100				atf_tc_fail("unexpected output");
101			}
102			regfree(&preg);
103		}
104		break;
105	case -1:
106		atf_tc_fail("fork");
107	}
108}
109
110LOCKFUN(DESTROYHELD, "destroy lock while held", 0,
111    "mutex error: mutex_destroy,.*: is locked or in use");
112LOCKFUN(DOUBLEFREE, "free lock twice", 0,
113    "panic: mutex_destroy,.*: uninitialized lock");
114LOCKFUN(DOUBLEINIT, "init lock twice", 1,
115    "mutex error: .*mutex_init,.*: already initialized");
116LOCKFUN(MEMFREE, "free memory active lock is in", 1,
117    "mutex error: kmem_intr_free,.*: allocation contains active lock");
118LOCKFUN(MTX, "locking-against-self mutex", 0,
119    "mutex error: mutex_enter,.*: locking against myself");
120LOCKFUN(RWDOUBLEX, "locking-against-self exclusive rwlock", 0,
121    "rwlock error: rw_enter,.*: locking against myself");
122LOCKFUN(RWRX, "rw: first shared, then exclusive", 1,
123    "rwlock error: rw_enter,.*: locking against myself");
124LOCKFUN(RWXR, "rw: first execusive, then shared", 0,
125    "rwlock error: rw_enter,.*: locking against myself");
126
127ATF_TP_ADD_TCS(tp)
128{
129
130	ATF_TP_ADD_TC(tp, lockme_MTX);
131	ATF_TP_ADD_TC(tp, lockme_RWDOUBLEX);
132	ATF_TP_ADD_TC(tp, lockme_RWRX);
133	ATF_TP_ADD_TC(tp, lockme_RWXR);
134	ATF_TP_ADD_TC(tp, lockme_DOUBLEINIT);
135	ATF_TP_ADD_TC(tp, lockme_DOUBLEFREE);
136	ATF_TP_ADD_TC(tp, lockme_DESTROYHELD);
137	ATF_TP_ADD_TC(tp, lockme_MEMFREE);
138
139	return atf_no_error();
140}
141