1#include <sched.h>
2#include <signal.h>
3#include <string.h>
4#include <stdio.h>
5#include <unistd.h>
6#include <sys/types.h>
7#include <sys/wait.h>
8#include <stackinfo.h>
9
10#ifndef TEST_CLONE_FLAGS
11#define TEST_CLONE_FLAGS 0
12#endif
13
14static int sig;
15
16static int
17f (void *a)
18{
19 puts (s: "in f");
20 union sigval sival;
21 sival.sival_int = getpid ();
22 printf (format: "pid = %d\n", sival.sival_int);
23 if (sigqueue (pid: getppid (), sig: sig, val: sival) != 0)
24 return 1;
25 return 0;
26}
27
28
29static int
30do_test (void)
31{
32 int mypid = getpid ();
33
34 sig = SIGRTMIN;
35 sigset_t ss;
36 sigemptyset (&ss);
37 sigaddset (&ss, sig);
38 if (sigprocmask (SIG_BLOCK, set: &ss, NULL) != 0)
39 {
40 printf (format: "sigprocmask failed: %m\n");
41 return 1;
42 }
43
44 char st[128 * 1024] __attribute__ ((aligned));
45# if _STACK_GROWS_DOWN
46 pid_t p = clone (fn: f, child_stack: st + sizeof (st), TEST_CLONE_FLAGS, arg: 0);
47# elif _STACK_GROWS_UP
48 pid_t p = clone (f, st, TEST_CLONE_FLAGS, 0);
49# else
50# error "Define either _STACK_GROWS_DOWN or _STACK_GROWS_UP"
51# endif
52 if (p == -1)
53 {
54 printf(format: "clone failed: %m\n");
55 return 1;
56 }
57 printf (format: "new thread: %d\n", (int) p);
58
59 siginfo_t si;
60 do
61 if (sigwaitinfo (set: &ss, info: &si) < 0)
62 {
63 printf(format: "sigwaitinfo failed: %m\n");
64 kill (pid: p, SIGKILL);
65 return 1;
66 }
67 while (si.si_signo != sig || si.si_code != SI_QUEUE);
68
69 int e;
70 if (waitpid (pid: p, stat_loc: &e, __WCLONE) != p)
71 {
72 puts (s: "waitpid failed");
73 kill (pid: p, SIGKILL);
74 return 1;
75 }
76 if (!WIFEXITED (e))
77 {
78 if (WIFSIGNALED (e))
79 printf (format: "died from signal %s\n", strsignal (WTERMSIG (e)));
80 else
81 puts (s: "did not terminate correctly");
82 return 1;
83 }
84 if (WEXITSTATUS (e) != 0)
85 {
86 printf (format: "exit code %d\n", WEXITSTATUS (e));
87 return 1;
88 }
89
90 if (si.si_int != (int) p)
91 {
92 printf (format: "expected PID %d, got si_int %d\n", (int) p, si.si_int);
93 kill (pid: p, SIGKILL);
94 return 1;
95 }
96
97 if (si.si_pid != p)
98 {
99 printf (format: "expected PID %d, got si_pid %d\n", (int) p, (int) si.si_pid);
100 kill (pid: p, SIGKILL);
101 return 1;
102 }
103
104 if (getpid () != mypid)
105 {
106 puts (s: "my PID changed");
107 return 1;
108 }
109
110 return 0;
111}
112
113#define TEST_FUNCTION do_test ()
114#include "../test-skeleton.c"
115

source code of glibc/sysdeps/unix/sysv/linux/tst-getpid1.c