1 | /* Verify that the parent pid is unchanged by __clone_internal. |
2 | Copyright (C) 2021-2024 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 <unistd.h> |
24 | #include <sys/types.h> |
25 | #include <sys/wait.h> |
26 | #include <clone_internal.h> |
27 | #include <support/xunistd.h> |
28 | |
29 | #ifndef TEST_CLONE_FLAGS |
30 | #define TEST_CLONE_FLAGS 0 |
31 | #endif |
32 | |
33 | static int sig; |
34 | |
35 | static int |
36 | f (void *a) |
37 | { |
38 | puts (s: "in f" ); |
39 | union sigval sival; |
40 | sival.sival_int = getpid (); |
41 | printf (format: "pid = %d\n" , sival.sival_int); |
42 | if (sigqueue (pid: getppid (), sig: sig, val: sival) != 0) |
43 | return 1; |
44 | return 0; |
45 | } |
46 | |
47 | |
48 | static int |
49 | do_test (void) |
50 | { |
51 | int mypid = getpid (); |
52 | |
53 | sig = SIGRTMIN; |
54 | sigset_t ss; |
55 | sigemptyset (&ss); |
56 | sigaddset (&ss, sig); |
57 | if (sigprocmask (SIG_BLOCK, set: &ss, NULL) != 0) |
58 | { |
59 | printf (format: "sigprocmask failed: %m\n" ); |
60 | return 1; |
61 | } |
62 | |
63 | #define STACK_SIZE 128 * 1024 |
64 | char st[STACK_SIZE] __attribute__ ((aligned)); |
65 | struct clone_args clone_args = |
66 | { |
67 | .flags = TEST_CLONE_FLAGS & ~CSIGNAL, |
68 | .exit_signal = TEST_CLONE_FLAGS & CSIGNAL, |
69 | .stack = (uintptr_t) st, |
70 | .stack_size = sizeof (st), |
71 | }; |
72 | pid_t p = __clone_internal (&clone_args, f, 0); |
73 | if (p == -1) |
74 | { |
75 | printf(format: "clone failed: %m\n" ); |
76 | return 1; |
77 | } |
78 | printf (format: "new thread: %d\n" , (int) p); |
79 | |
80 | siginfo_t si; |
81 | do |
82 | if (sigwaitinfo (set: &ss, info: &si) < 0) |
83 | { |
84 | printf(format: "sigwaitinfo failed: %m\n" ); |
85 | kill (pid: p, SIGKILL); |
86 | return 1; |
87 | } |
88 | while (si.si_signo != sig || si.si_code != SI_QUEUE); |
89 | |
90 | int e; |
91 | xwaitpid (p, status: &e, __WCLONE); |
92 | if (!WIFEXITED (e)) |
93 | { |
94 | if (WIFSIGNALED (e)) |
95 | printf (format: "died from signal %s\n" , strsignal (WTERMSIG (e))); |
96 | else |
97 | puts (s: "did not terminate correctly" ); |
98 | return 1; |
99 | } |
100 | if (WEXITSTATUS (e) != 0) |
101 | { |
102 | printf (format: "exit code %d\n" , WEXITSTATUS (e)); |
103 | return 1; |
104 | } |
105 | |
106 | if (si.si_int != (int) p) |
107 | { |
108 | printf (format: "expected PID %d, got si_int %d\n" , (int) p, si.si_int); |
109 | kill (pid: p, SIGKILL); |
110 | return 1; |
111 | } |
112 | |
113 | if (si.si_pid != p) |
114 | { |
115 | printf (format: "expected PID %d, got si_pid %d\n" , (int) p, (int) si.si_pid); |
116 | kill (pid: p, SIGKILL); |
117 | return 1; |
118 | } |
119 | |
120 | if (getpid () != mypid) |
121 | { |
122 | puts (s: "my PID changed" ); |
123 | return 1; |
124 | } |
125 | |
126 | return 0; |
127 | } |
128 | |
129 | #include <support/test-driver.c> |
130 | |