1 /* $NetBSD: t_clone.c,v 1.3 2011/12/12 20:55:44 joerg Exp $ */
4 * Copyright (c) 2008 The NetBSD Foundation, Inc.
7 * This code is derived from software contributed to The NetBSD Foundation
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
32 #include <sys/cdefs.h>
33 __COPYRIGHT("@(#) Copyright (c) 2008\
34 The NetBSD Foundation, inc. All rights reserved.");
35 __RCSID("$NetBSD: t_clone.c,v 1.3 2011/12/12 20:55:44 joerg Exp $");
38 #include <sys/resource.h>
39 #include <sys/types.h>
52 #define STACKSIZE (8 * 1024)
54 #define CHILDEXIT 0xa5
66 long *frobp = arg, diff;
68 printf("child: stack ~= %p, frobme = %p\n", &frobp, frobp);
71 if (frobp[0] != getppid())
74 if (frobp[0] == getpid())
77 diff = labs(frobp[1] - (long) &frobp);
88 ATF_TC_HEAD(clone_basic, tc)
91 atf_tc_set_md_var(tc, "descr", "Checks clone(2)");
94 ATF_TC_BODY(clone_basic, tc)
97 void *allocstack, *stack;
99 volatile long frobme[2];
102 allocstack = mmap(NULL, STACKSIZE, PROT_READ|PROT_WRITE|PROT_EXEC,
103 MAP_PRIVATE|MAP_ANON, -1, (off_t) 0);
105 ATF_REQUIRE_ERRNO(errno, allocstack != MAP_FAILED);
108 #ifndef __MACHINE_STACK_GROWS_UP
109 stack = (char *)stack + STACKSIZE;
112 printf("parent: stack = %p, frobme = %p\n", stack, frobme);
115 frobme[0] = (long)getpid();
116 frobme[1] = (long)stack;
119 sigaddset(&mask, SIGUSR1);
121 ATF_REQUIRE_ERRNO(errno, sigprocmask(SIG_BLOCK, &mask, NULL) != -1);
123 switch (pid = __clone(clone_func, stack,
124 CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|SIGUSR1,
125 __UNVOLATILE(frobme))) {
127 atf_tc_fail("clone() returned 0");
130 atf_tc_fail("clone() failed: %s", strerror(errno));
133 while (waitpid(pid, &stat, __WCLONE) != pid)
137 ATF_REQUIRE_MSG(WIFEXITED(stat) != 0, "child didn't exit");
139 printf("parent: childexit = 0x%x, frobme = %ld\n",
140 WEXITSTATUS(stat), frobme[1]);
142 switch (WEXITSTATUS(stat)) {
144 ATF_REQUIRE_EQ(frobme[1], FROBVAL);
147 atf_tc_fail("child: argument does not contain parent's pid");
150 atf_tc_fail("child: called in parent's pid");
153 atf_tc_fail("child: called with bad stack");
156 atf_tc_fail("child returned unknown code: %d",
161 ATF_REQUIRE_ERRNO(errno, munmap(allocstack, STACKSIZE) != -1);
164 ATF_TC(clone_null_stack);
165 ATF_TC_HEAD(clone_null_stack, tc)
168 atf_tc_set_md_var(tc, "descr",
169 "Checks that clone(2) fails when stack pointer is NULL");
172 ATF_TC_BODY(clone_null_stack, tc)
176 rv = __clone(dummy, NULL,
177 CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|SIGCHLD, NULL);
179 ATF_REQUIRE_EQ(rv, -1);
180 ATF_REQUIRE_EQ(errno, EINVAL);
183 ATF_TC(clone_null_func);
184 ATF_TC_HEAD(clone_null_func, tc)
187 atf_tc_set_md_var(tc, "descr",
188 "Checks that clone(2) fails when function pointer is NULL");
191 ATF_TC_BODY(clone_null_func, tc)
193 void *allocstack, *stack;
196 allocstack = mmap(NULL, STACKSIZE, PROT_READ|PROT_WRITE|PROT_EXEC,
197 MAP_PRIVATE|MAP_ANON, -1, (off_t) 0);
198 ATF_REQUIRE_ERRNO(errno, allocstack != MAP_FAILED);
200 #ifndef __MACHINE_STACK_GROWS_UP
201 stack = (char *)stack + STACKSIZE;
205 rv = __clone(0, stack,
206 CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|SIGCHLD, NULL);
208 ATF_REQUIRE_EQ(rv, -1);
209 ATF_REQUIRE_EQ(errno, EINVAL);
211 ATF_REQUIRE_ERRNO(errno, munmap(allocstack, STACKSIZE) != -1);
214 ATF_TC(clone_out_of_proc);
215 ATF_TC_HEAD(clone_out_of_proc, tc)
218 atf_tc_set_md_var(tc, "descr",
219 "Checks that clone(2) fails when running out of processes");
220 atf_tc_set_md_var(tc, "require.user", "unprivileged");
223 ATF_TC_BODY(clone_out_of_proc, tc)
228 ATF_REQUIRE_ERRNO(errno, getrlimit(RLIMIT_NPROC, &rl) != -1);
233 ATF_REQUIRE_ERRNO(errno, setrlimit(RLIMIT_NPROC, &rl) != -1);
236 rv = __clone(dummy, malloc(10240),
237 CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|SIGCHLD, (void *)&rl);
239 ATF_REQUIRE_EQ(rv, -1);
240 ATF_REQUIRE_EQ(errno, EAGAIN);
246 ATF_TP_ADD_TC(tp, clone_basic);
247 ATF_TP_ADD_TC(tp, clone_null_stack);
248 ATF_TP_ADD_TC(tp, clone_null_func);
249 ATF_TP_ADD_TC(tp, clone_out_of_proc);
251 return atf_no_error();