t_lwproc.c revision 313498 
1/*	$NetBSD: t_lwproc.c,v 1.7 2015/01/21 15:19:01 pooka Exp $	*/
2
3/*
4 * Copyright (c) 2010 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/wait.h>
32
33#include <rump/rump.h>
34#include <rump/rump_syscalls.h>
35
36#include <atf-c.h>
37#include <err.h>
38#include <errno.h>
39#include <fcntl.h>
40#include <stdio.h>
41#include <stdlib.h>
42#include <string.h>
43#include <unistd.h>
44#include <util.h>
45
46#include "../../h_macros.h"
47
48ATF_TC(makelwp);
49ATF_TC_HEAD(makelwp, tc)
50{
51
52	atf_tc_set_md_var(tc, "descr", "tests that lwps can be attached to "
53	    "processes");
54}
55
56ATF_TC_BODY(makelwp, tc)
57{
58	struct lwp *l;
59	pid_t pid;
60
61	rump_init();
62	RZ(rump_pub_lwproc_newlwp(0));
63	ATF_REQUIRE_EQ(rump_pub_lwproc_newlwp(37), ESRCH);
64	l = rump_pub_lwproc_curlwp();
65
66	RZ(rump_pub_lwproc_rfork(RUMP_RFCFDG));
67	ATF_REQUIRE(rump_pub_lwproc_curlwp() != l);
68	l = rump_pub_lwproc_curlwp();
69
70	RZ(rump_pub_lwproc_newlwp(rump_sys_getpid()));
71	ATF_REQUIRE(rump_pub_lwproc_curlwp() != l);
72
73	pid = rump_sys_getpid();
74	ATF_REQUIRE(pid != -1 && pid != 0);
75}
76
77ATF_TC(proccreds);
78ATF_TC_HEAD(proccreds, tc)
79{
80
81	atf_tc_set_md_var(tc, "descr", "check that procs have different creds");
82}
83
84ATF_TC_BODY(proccreds, tc)
85{
86	struct lwp *l1, *l2;
87
88	rump_init();
89	RZ(rump_pub_lwproc_rfork(RUMP_RFCFDG));
90	l1 = rump_pub_lwproc_curlwp();
91	RZ(rump_pub_lwproc_newlwp(rump_sys_getpid()));
92
93	RZ(rump_pub_lwproc_rfork(RUMP_RFCFDG));
94	l2 = rump_pub_lwproc_curlwp();
95
96	RL(rump_sys_setuid(22));
97	ATF_REQUIRE_EQ(rump_sys_getuid(), 22);
98
99	rump_pub_lwproc_switch(l1);
100	ATF_REQUIRE_EQ(rump_sys_getuid(), 0); /* from parent, proc0 */
101	RL(rump_sys_setuid(11));
102	ATF_REQUIRE_EQ(rump_sys_getuid(), 11);
103
104	rump_pub_lwproc_switch(l2);
105	ATF_REQUIRE_EQ(rump_sys_getuid(), 22);
106	rump_pub_lwproc_newlwp(rump_sys_getpid());
107	ATF_REQUIRE_EQ(rump_sys_getuid(), 22);
108}
109
110
111ATF_TC(inherit);
112ATF_TC_HEAD(inherit, tc)
113{
114
115	atf_tc_set_md_var(tc, "descr", "new processes inherit creds from "
116	    "parents");
117}
118
119ATF_TC_BODY(inherit, tc)
120{
121
122	rump_init();
123
124	RZ(rump_pub_lwproc_rfork(RUMP_RFCFDG));
125	RL(rump_sys_setuid(66));
126	ATF_REQUIRE_EQ(rump_sys_getuid(), 66);
127
128	RZ(rump_pub_lwproc_rfork(RUMP_RFCFDG));
129	ATF_REQUIRE_EQ(rump_sys_getuid(), 66);
130
131	/* release lwp and proc */
132	rump_pub_lwproc_releaselwp();
133	ATF_REQUIRE_EQ(rump_sys_getuid(), 0);
134}
135
136ATF_TC(lwps);
137ATF_TC_HEAD(lwps, tc)
138{
139
140	atf_tc_set_md_var(tc, "descr", "proc can hold many lwps and is "
141	    "automatically g/c'd when the last one exits");
142}
143
144#define LOOPS 128
145ATF_TC_BODY(lwps, tc)
146{
147	struct lwp *l[LOOPS];
148	pid_t mypid;
149	struct lwp *l_orig;
150	int i;
151
152	rump_init();
153
154	RZ(rump_pub_lwproc_rfork(RUMP_RFCFDG));
155	mypid = rump_sys_getpid();
156	RL(rump_sys_setuid(375));
157
158	l_orig = rump_pub_lwproc_curlwp();
159	for (i = 0; i < LOOPS; i++) {
160		mypid = rump_sys_getpid();
161		ATF_REQUIRE(mypid != -1 && mypid != 0);
162		RZ(rump_pub_lwproc_newlwp(mypid));
163		l[i] = rump_pub_lwproc_curlwp();
164		ATF_REQUIRE_EQ(rump_sys_getuid(), 375);
165	}
166
167	rump_pub_lwproc_switch(l_orig);
168	rump_pub_lwproc_releaselwp();
169	for (i = 0; i < LOOPS; i++) {
170		rump_pub_lwproc_switch(l[i]);
171		ATF_REQUIRE_EQ(rump_sys_getpid(), mypid);
172		ATF_REQUIRE_EQ(rump_sys_getuid(), 375);
173		rump_pub_lwproc_releaselwp();
174		ATF_REQUIRE_EQ(rump_sys_getpid(), 1);
175		ATF_REQUIRE_EQ(rump_sys_getuid(), 0);
176	}
177
178	ATF_REQUIRE_EQ(rump_pub_lwproc_newlwp(mypid), ESRCH);
179}
180
181ATF_TC(nolwprelease);
182ATF_TC_HEAD(nolwprelease, tc)
183{
184
185	atf_tc_set_md_var(tc, "descr", "check that lwp context is required "
186	    "for lwproc_releaselwp()");
187}
188
189ATF_TC_BODY(nolwprelease, tc)
190{
191	int status;
192
193	switch (fork()) {
194	case 0:
195		rump_init();
196		rump_pub_lwproc_releaselwp();
197		atf_tc_fail("survived");
198		break;
199	case -1:
200		atf_tc_fail_errno("fork");
201		break;
202	default:
203		wait(&status);
204		ATF_REQUIRE(WIFSIGNALED(status));
205		ATF_REQUIRE_EQ(WTERMSIG(status), SIGABRT);
206
207	}
208}
209
210ATF_TC(nolwp);
211ATF_TC_HEAD(nolwp, tc)
212{
213
214	atf_tc_set_md_var(tc, "descr", "check that curlwp for an implicit "
215	    "context is NULL");
216}
217
218ATF_TC_BODY(nolwp, tc)
219{
220
221	rump_init();
222	ATF_REQUIRE_EQ(rump_pub_lwproc_curlwp(), NULL);
223}
224
225ATF_TC(nullswitch);
226ATF_TC_HEAD(nullswitch, tc)
227{
228
229	atf_tc_set_md_var(tc, "descr", "check that switching to NULL marks "
230	    "current lwp as not running");
231}
232
233ATF_TC_BODY(nullswitch, tc)
234{
235	struct lwp *l;
236
237	rump_init();
238	RZ(rump_pub_lwproc_newlwp(0));
239	l = rump_pub_lwproc_curlwp();
240	rump_pub_lwproc_switch(NULL);
241	/* if remains LP_RUNNING, next call will panic */
242	rump_pub_lwproc_switch(l);
243}
244
245ATF_TC(rfork);
246ATF_TC_HEAD(rfork, tc)
247{
248
249	atf_tc_set_md_var(tc, "descr", "check that fork shares fd's");
250}
251
252ATF_TC_BODY(rfork, tc)
253{
254	struct stat sb;
255	struct lwp *l, *l2;
256	int fd;
257
258	RZ(rump_init());
259
260	ATF_REQUIRE_EQ(rump_pub_lwproc_rfork(RUMP_RFFDG|RUMP_RFCFDG), EINVAL);
261
262	RZ(rump_pub_lwproc_rfork(0));
263	l = rump_pub_lwproc_curlwp();
264
265	RL(fd = rump_sys_open("/file", O_RDWR | O_CREAT, 0777));
266
267	/* ok, first check rfork(RUMP_RFCFDG) does *not* preserve fd's */
268	RZ(rump_pub_lwproc_rfork(RUMP_RFCFDG));
269	ATF_REQUIRE_ERRNO(EBADF, rump_sys_write(fd, &fd, sizeof(fd)) == -1);
270
271	/* then check that rfork(0) does */
272	rump_pub_lwproc_switch(l);
273	RZ(rump_pub_lwproc_rfork(0));
274	ATF_REQUIRE_EQ(rump_sys_write(fd, &fd, sizeof(fd)), sizeof(fd));
275	RL(rump_sys_fstat(fd, &sb));
276	l2 = rump_pub_lwproc_curlwp();
277
278	/*
279	 * check that the shared fd table is really shared by
280	 * closing fd in parent
281	 */
282	rump_pub_lwproc_switch(l);
283	RL(rump_sys_close(fd));
284	rump_pub_lwproc_switch(l2);
285	ATF_REQUIRE_ERRNO(EBADF, rump_sys_fstat(fd, &sb) == -1);
286
287	/* redo, this time copying the fd table instead of sharing it */
288	rump_pub_lwproc_releaselwp();
289	rump_pub_lwproc_switch(l);
290	RL(fd = rump_sys_open("/file", O_RDWR, 0777));
291	RZ(rump_pub_lwproc_rfork(RUMP_RFFDG));
292	ATF_REQUIRE_EQ(rump_sys_write(fd, &fd, sizeof(fd)), sizeof(fd));
293	RL(rump_sys_fstat(fd, &sb));
294	l2 = rump_pub_lwproc_curlwp();
295
296	/* check that the fd table is copied */
297	rump_pub_lwproc_switch(l);
298	RL(rump_sys_close(fd));
299	rump_pub_lwproc_switch(l2);
300	RL(rump_sys_fstat(fd, &sb));
301	ATF_REQUIRE_EQ(sb.st_size, sizeof(fd));
302}
303
304ATF_TP_ADD_TCS(tp)
305{
306
307	ATF_TP_ADD_TC(tp, makelwp);
308	ATF_TP_ADD_TC(tp, proccreds);
309	ATF_TP_ADD_TC(tp, inherit);
310	ATF_TP_ADD_TC(tp, lwps);
311	ATF_TP_ADD_TC(tp, nolwprelease);
312	ATF_TP_ADD_TC(tp, nolwp);
313	ATF_TP_ADD_TC(tp, nullswitch);
314	ATF_TP_ADD_TC(tp, rfork);
315
316	return atf_no_error();
317}
318