1 | /* Test if CLONE_VM does not change pthread pid/tid field (BZ #19957) |
2 | Copyright (C) 2016-2022 Free Software Foundation, Inc. |
3 | This file is part of the GNU C Library. |
4 | |
5 | The GNU C Library is free software; you can redistribute it and/or |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either |
8 | version 2.1 of the License, or (at your option) any later version. |
9 | |
10 | The GNU C Library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | Lesser General Public License for more details. |
14 | |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with the GNU C Library; if not, see |
17 | <https://www.gnu.org/licenses/>. */ |
18 | |
19 | #include <sched.h> |
20 | #include <signal.h> |
21 | #include <string.h> |
22 | #include <stdio.h> |
23 | #include <fcntl.h> |
24 | #include <unistd.h> |
25 | #include <stddef.h> |
26 | #include <stdbool.h> |
27 | #include <stdint.h> |
28 | #include <stdlib.h> |
29 | #include <sys/types.h> |
30 | #include <sys/wait.h> |
31 | #include <sys/syscall.h> |
32 | |
33 | #include <stackinfo.h> /* For _STACK_GROWS_{UP,DOWN}. */ |
34 | |
35 | #include <support/check.h> |
36 | |
37 | static int sig; |
38 | static int pipefd[2]; |
39 | |
40 | static int |
41 | f (void *a) |
42 | { |
43 | close (fd: pipefd[0]); |
44 | |
45 | pid_t ppid = getppid (); |
46 | pid_t pid = getpid (); |
47 | pid_t tid = syscall (__NR_gettid); |
48 | |
49 | if (write (pipefd[1], &ppid, sizeof ppid) != sizeof (ppid)) |
50 | FAIL_EXIT1 ("write ppid failed\n" ); |
51 | if (write (pipefd[1], &pid, sizeof pid) != sizeof (pid)) |
52 | FAIL_EXIT1 ("write pid failed\n" ); |
53 | if (write (pipefd[1], &tid, sizeof tid) != sizeof (tid)) |
54 | FAIL_EXIT1 ("write tid failed\n" ); |
55 | |
56 | return 0; |
57 | } |
58 | |
59 | |
60 | static int |
61 | do_test (void) |
62 | { |
63 | sig = SIGRTMIN; |
64 | sigset_t ss; |
65 | sigemptyset (&ss); |
66 | sigaddset (&ss, sig); |
67 | if (sigprocmask (SIG_BLOCK, set: &ss, NULL) != 0) |
68 | FAIL_EXIT1 ("sigprocmask failed: %m" ); |
69 | |
70 | if (pipe2 (pipedes: pipefd, O_CLOEXEC)) |
71 | FAIL_EXIT1 ("pipe failed: %m" ); |
72 | |
73 | int clone_flags = 0; |
74 | #ifdef __ia64__ |
75 | extern int __clone2 (int (*__fn) (void *__arg), void *__child_stack_base, |
76 | size_t __child_stack_size, int __flags, |
77 | void *__arg, ...); |
78 | char st[256 * 1024] __attribute__ ((aligned)); |
79 | pid_t p = __clone2 (f, st, sizeof (st), clone_flags, 0); |
80 | #else |
81 | char st[128 * 1024] __attribute__ ((aligned)); |
82 | #if _STACK_GROWS_DOWN |
83 | pid_t p = clone (fn: f, child_stack: st + sizeof (st), flags: clone_flags, arg: 0); |
84 | #elif _STACK_GROWS_UP |
85 | pid_t p = clone (f, st, clone_flags, 0); |
86 | #else |
87 | #error "Define either _STACK_GROWS_DOWN or _STACK_GROWS_UP" |
88 | #endif |
89 | #endif |
90 | |
91 | close (fd: pipefd[1]); |
92 | |
93 | if (p == -1) |
94 | FAIL_EXIT1("clone failed: %m" ); |
95 | |
96 | pid_t ppid, pid, tid; |
97 | if (read (pipefd[0], &ppid, sizeof pid) != sizeof pid) |
98 | { |
99 | kill (pid: p, SIGKILL); |
100 | FAIL_EXIT1 ("read ppid failed: %m" ); |
101 | } |
102 | if (read (pipefd[0], &pid, sizeof pid) != sizeof pid) |
103 | { |
104 | kill (pid: p, SIGKILL); |
105 | FAIL_EXIT1 ("read pid failed: %m" ); |
106 | } |
107 | if (read (pipefd[0], &tid, sizeof tid) != sizeof tid) |
108 | { |
109 | kill (pid: p, SIGKILL); |
110 | FAIL_EXIT1 ("read tid failed: %m" ); |
111 | } |
112 | |
113 | close (fd: pipefd[0]); |
114 | |
115 | int ret = 0; |
116 | |
117 | pid_t own_pid = getpid (); |
118 | pid_t own_tid = syscall (__NR_gettid); |
119 | |
120 | /* Some sanity checks for clone syscall: returned ppid should be current |
121 | pid and both returned tid/pid should be different from current one. */ |
122 | if ((ppid != own_pid) || (pid == own_pid) || (tid == own_tid)) |
123 | FAIL_RET ("ppid=%i pid=%i tid=%i | own_pid=%i own_tid=%i" , |
124 | (int)ppid, (int)pid, (int)tid, (int)own_pid, (int)own_tid); |
125 | |
126 | int e; |
127 | if (waitpid (pid: p, stat_loc: &e, __WCLONE) != p) |
128 | { |
129 | kill (pid: p, SIGKILL); |
130 | FAIL_EXIT1 ("waitpid failed" ); |
131 | } |
132 | if (!WIFEXITED (e)) |
133 | { |
134 | if (WIFSIGNALED (e)) |
135 | printf (format: "died from signal %s\n" , strsignal (WTERMSIG (e))); |
136 | else |
137 | puts (s: "did not terminate correctly" ); |
138 | exit (EXIT_FAILURE); |
139 | } |
140 | if (WEXITSTATUS (e) != 0) |
141 | FAIL_EXIT1 ("exit code %d" , WEXITSTATUS (e)); |
142 | |
143 | return ret; |
144 | } |
145 | |
146 | #include <support/test-driver.c> |
147 | |