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
49 ATF_TC(makelwp);
ATF_TC_HEAD(makelwp,tc)50 ATF_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
ATF_TC_BODY(makelwp,tc)57 ATF_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
78 ATF_TC(proccreds);
ATF_TC_HEAD(proccreds,tc)79 ATF_TC_HEAD(proccreds, tc)
80 {
81
82 atf_tc_set_md_var(tc, "descr", "check that procs have different creds");
83 }
84
ATF_TC_BODY(proccreds,tc)85 ATF_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
112 ATF_TC(inherit);
ATF_TC_HEAD(inherit,tc)113 ATF_TC_HEAD(inherit, tc)
114 {
115
116 atf_tc_set_md_var(tc, "descr", "new processes inherit creds from "
117 "parents");
118 }
119
ATF_TC_BODY(inherit,tc)120 ATF_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
137 ATF_TC(lwps);
ATF_TC_HEAD(lwps,tc)138 ATF_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
ATF_TC_BODY(lwps,tc)146 ATF_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
182 ATF_TC(nolwprelease);
ATF_TC_HEAD(nolwprelease,tc)183 ATF_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
ATF_TC_BODY(nolwprelease,tc)190 ATF_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
211 ATF_TC(nolwp);
ATF_TC_HEAD(nolwp,tc)212 ATF_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
ATF_TC_BODY(nolwp,tc)219 ATF_TC_BODY(nolwp, tc)
220 {
221
222 rump_init();
223 ATF_REQUIRE_EQ(rump_pub_lwproc_curlwp(), NULL);
224 }
225
226 ATF_TC(nullswitch);
ATF_TC_HEAD(nullswitch,tc)227 ATF_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
ATF_TC_BODY(nullswitch,tc)234 ATF_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
246 ATF_TC(rfork);
ATF_TC_HEAD(rfork,tc)247 ATF_TC_HEAD(rfork, tc)
248 {
249
250 atf_tc_set_md_var(tc, "descr", "check that fork shares fd's");
251 }
252
ATF_TC_BODY(rfork,tc)253 ATF_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
ATF_TP_ADD_TCS(tp)305 ATF_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