t_lwproc.c revision 314817 
1/*	$NetBSD: t_lwproc.c,v 1.9 2017/01/13 21:30:43 christos 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#include <sys/stat.h>
33
34#include <rump/rump.h>
35#include <rump/rump_syscalls.h>
36
37#include <atf-c.h>
38#include <err.h>
39#include <errno.h>
40#include <fcntl.h>
41#include <stdio.h>
42#include <stdlib.h>
43#include <string.h>
44#include <unistd.h>
45#include <util.h>
46
47#include "h_macros.h"
48
49ATF_TC(makelwp);
50ATF_TC_HEAD(makelwp, tc)
51{
52
53	atf_tc_set_md_var(tc, "descr", "tests that lwps can be attached to "
54	    "processes");
55}
56
57ATF_TC_BODY(makelwp, tc)
58{
59	struct lwp *l;
60	pid_t pid;
61
62	rump_init();
63	RZ(rump_pub_lwproc_newlwp(0));
64	ATF_REQUIRE_EQ(rump_pub_lwproc_newlwp(37), ESRCH);
65	l = rump_pub_lwproc_curlwp();
66
67	RZ(rump_pub_lwproc_rfork(RUMP_RFCFDG));
68	ATF_REQUIRE(rump_pub_lwproc_curlwp() != l);
69	l = rump_pub_lwproc_curlwp();
70
71	RZ(rump_pub_lwproc_newlwp(rump_sys_getpid()));
72	ATF_REQUIRE(rump_pub_lwproc_curlwp() != l);
73
74	pid = rump_sys_getpid();
75	ATF_REQUIRE(pid != -1 && pid != 0);
76}
77
78ATF_TC(proccreds);
79ATF_TC_HEAD(proccreds, tc)
80{
81
82	atf_tc_set_md_var(tc, "descr", "check that procs have different creds");
83}
84
85ATF_TC_BODY(proccreds, tc)
86{
87	struct lwp *l1, *l2;
88
89	rump_init();
90	RZ(rump_pub_lwproc_rfork(RUMP_RFCFDG));
91	l1 = rump_pub_lwproc_curlwp();
92	RZ(rump_pub_lwproc_newlwp(rump_sys_getpid()));
93
94	RZ(rump_pub_lwproc_rfork(RUMP_RFCFDG));
95	l2 = rump_pub_lwproc_curlwp();
96
97	RL(rump_sys_setuid(22));
98	ATF_REQUIRE_EQ(rump_sys_getuid(), 22);
99
100	rump_pub_lwproc_switch(l1);
101	ATF_REQUIRE_EQ(rump_sys_getuid(), 0); /* from parent, proc0 */
102	RL(rump_sys_setuid(11));
103	ATF_REQUIRE_EQ(rump_sys_getuid(), 11);
104
105	rump_pub_lwproc_switch(l2);
106	ATF_REQUIRE_EQ(rump_sys_getuid(), 22);
107	rump_pub_lwproc_newlwp(rump_sys_getpid());
108	ATF_REQUIRE_EQ(rump_sys_getuid(), 22);
109}
110
111
112ATF_TC(inherit);
113ATF_TC_HEAD(inherit, tc)
114{
115
116	atf_tc_set_md_var(tc, "descr", "new processes inherit creds from "
117	    "parents");
118}
119
120ATF_TC_BODY(inherit, tc)
121{
122
123	rump_init();
124
125	RZ(rump_pub_lwproc_rfork(RUMP_RFCFDG));
126	RL(rump_sys_setuid(66));
127	ATF_REQUIRE_EQ(rump_sys_getuid(), 66);
128
129	RZ(rump_pub_lwproc_rfork(RUMP_RFCFDG));
130	ATF_REQUIRE_EQ(rump_sys_getuid(), 66);
131
132	/* release lwp and proc */
133	rump_pub_lwproc_releaselwp();
134	ATF_REQUIRE_EQ(rump_sys_getuid(), 0);
135}
136
137ATF_TC(lwps);
138ATF_TC_HEAD(lwps, tc)
139{
140
141	atf_tc_set_md_var(tc, "descr", "proc can hold many lwps and is "
142	    "automatically g/c'd when the last one exits");
143}
144
145#define LOOPS 128
146ATF_TC_BODY(lwps, tc)
147{
148	struct lwp *l[LOOPS];
149	pid_t mypid;
150	struct lwp *l_orig;
151	int i;
152
153	rump_init();
154
155	RZ(rump_pub_lwproc_rfork(RUMP_RFCFDG));
156	mypid = rump_sys_getpid();
157	RL(rump_sys_setuid(375));
158
159	l_orig = rump_pub_lwproc_curlwp();
160	for (i = 0; i < LOOPS; i++) {
161		mypid = rump_sys_getpid();
162		ATF_REQUIRE(mypid != -1 && mypid != 0);
163		RZ(rump_pub_lwproc_newlwp(mypid));
164		l[i] = rump_pub_lwproc_curlwp();
165		ATF_REQUIRE_EQ(rump_sys_getuid(), 375);
166	}
167
168	rump_pub_lwproc_switch(l_orig);
169	rump_pub_lwproc_releaselwp();
170	for (i = 0; i < LOOPS; i++) {
171		rump_pub_lwproc_switch(l[i]);
172		ATF_REQUIRE_EQ(rump_sys_getpid(), mypid);
173		ATF_REQUIRE_EQ(rump_sys_getuid(), 375);
174		rump_pub_lwproc_releaselwp();
175		ATF_REQUIRE_EQ(rump_sys_getpid(), 1);
176		ATF_REQUIRE_EQ(rump_sys_getuid(), 0);
177	}
178
179	ATF_REQUIRE_EQ(rump_pub_lwproc_newlwp(mypid), ESRCH);
180}
181
182ATF_TC(nolwprelease);
183ATF_TC_HEAD(nolwprelease, tc)
184{
185
186	atf_tc_set_md_var(tc, "descr", "check that lwp context is required "
187	    "for lwproc_releaselwp()");
188}
189
190ATF_TC_BODY(nolwprelease, tc)
191{
192	int status;
193
194	switch (fork()) {
195	case 0:
196		rump_init();
197		rump_pub_lwproc_releaselwp();
198		atf_tc_fail("survived");
199		break;
200	case -1:
201		atf_tc_fail_errno("fork");
202		break;
203	default:
204		wait(&status);
205		ATF_REQUIRE(WIFSIGNALED(status));
206		ATF_REQUIRE_EQ(WTERMSIG(status), SIGABRT);
207
208	}
209}
210
211ATF_TC(nolwp);
212ATF_TC_HEAD(nolwp, tc)
213{
214
215	atf_tc_set_md_var(tc, "descr", "check that curlwp for an implicit "
216	    "context is NULL");
217}
218
219ATF_TC_BODY(nolwp, tc)
220{
221
222	rump_init();
223	ATF_REQUIRE_EQ(rump_pub_lwproc_curlwp(), NULL);
224}
225
226ATF_TC(nullswitch);
227ATF_TC_HEAD(nullswitch, tc)
228{
229
230	atf_tc_set_md_var(tc, "descr", "check that switching to NULL marks "
231	    "current lwp as not running");
232}
233
234ATF_TC_BODY(nullswitch, tc)
235{
236	struct lwp *l;
237
238	rump_init();
239	RZ(rump_pub_lwproc_newlwp(0));
240	l = rump_pub_lwproc_curlwp();
241	rump_pub_lwproc_switch(NULL);
242	/* if remains LP_RUNNING, next call will panic */
243	rump_pub_lwproc_switch(l);
244}
245
246ATF_TC(rfork);
247ATF_TC_HEAD(rfork, tc)
248{
249
250	atf_tc_set_md_var(tc, "descr", "check that fork shares fd's");
251}
252
253ATF_TC_BODY(rfork, tc)
254{
255	struct stat sb;
256	struct lwp *l, *l2;
257	int fd;
258
259	RZ(rump_init());
260
261	ATF_REQUIRE_EQ(rump_pub_lwproc_rfork(RUMP_RFFDG|RUMP_RFCFDG), EINVAL);
262
263	RZ(rump_pub_lwproc_rfork(0));
264	l = rump_pub_lwproc_curlwp();
265
266	RL(fd = rump_sys_open("/file", O_RDWR | O_CREAT, 0777));
267
268	/* ok, first check rfork(RUMP_RFCFDG) does *not* preserve fd's */
269	RZ(rump_pub_lwproc_rfork(RUMP_RFCFDG));
270	ATF_REQUIRE_ERRNO(EBADF, rump_sys_write(fd, &fd, sizeof(fd)) == -1);
271
272	/* then check that rfork(0) does */
273	rump_pub_lwproc_switch(l);
274	RZ(rump_pub_lwproc_rfork(0));
275	ATF_REQUIRE_EQ(rump_sys_write(fd, &fd, sizeof(fd)), sizeof(fd));
276	RL(rump_sys_fstat(fd, &sb));
277	l2 = rump_pub_lwproc_curlwp();
278
279	/*
280	 * check that the shared fd table is really shared by
281	 * closing fd in parent
282	 */
283	rump_pub_lwproc_switch(l);
284	RL(rump_sys_close(fd));
285	rump_pub_lwproc_switch(l2);
286	ATF_REQUIRE_ERRNO(EBADF, rump_sys_fstat(fd, &sb) == -1);
287
288	/* redo, this time copying the fd table instead of sharing it */
289	rump_pub_lwproc_releaselwp();
290	rump_pub_lwproc_switch(l);
291	RL(fd = rump_sys_open("/file", O_RDWR, 0777));
292	RZ(rump_pub_lwproc_rfork(RUMP_RFFDG));
293	ATF_REQUIRE_EQ(rump_sys_write(fd, &fd, sizeof(fd)), sizeof(fd));
294	RL(rump_sys_fstat(fd, &sb));
295	l2 = rump_pub_lwproc_curlwp();
296
297	/* check that the fd table is copied */
298	rump_pub_lwproc_switch(l);
299	RL(rump_sys_close(fd));
300	rump_pub_lwproc_switch(l2);
301	RL(rump_sys_fstat(fd, &sb));
302	ATF_REQUIRE_EQ(sb.st_size, sizeof(fd));
303}
304
305ATF_TP_ADD_TCS(tp)
306{
307
308	ATF_TP_ADD_TC(tp, makelwp);
309	ATF_TP_ADD_TC(tp, proccreds);
310	ATF_TP_ADD_TC(tp, inherit);
311	ATF_TP_ADD_TC(tp, lwps);
312	ATF_TP_ADD_TC(tp, nolwprelease);
313	ATF_TP_ADD_TC(tp, nolwp);
314	ATF_TP_ADD_TC(tp, nullswitch);
315	ATF_TP_ADD_TC(tp, rfork);
316
317	return atf_no_error();
318}
319