1*d21b3d34SFangrui Song // RUN: %clangxx_msan -O0 -std=c++11 -g %s -o %t
2*d21b3d34SFangrui Song // RUN: %run %t _ 2>&1 | FileCheck %s --check-prefix=CLEAN
3*d21b3d34SFangrui Song // RUN: not %run %t A 2>&1 | FileCheck %s --check-prefix=A
4*d21b3d34SFangrui Song // RUN: not %run %t B 2>&1 | FileCheck %s --check-prefix=B
5*d21b3d34SFangrui Song
6*d21b3d34SFangrui Song #include <assert.h>
7*d21b3d34SFangrui Song #include <poll.h>
8*d21b3d34SFangrui Song #include <signal.h>
9*d21b3d34SFangrui Song #include <stdio.h>
10*d21b3d34SFangrui Song
11*d21b3d34SFangrui Song #include <sanitizer/msan_interface.h>
12*d21b3d34SFangrui Song
main(int argc,char ** argv)13*d21b3d34SFangrui Song int main(int argc, char **argv) {
14*d21b3d34SFangrui Song char T = argv[1][0];
15*d21b3d34SFangrui Song
16*d21b3d34SFangrui Song struct timespec ts;
17*d21b3d34SFangrui Song ts.tv_sec = 0;
18*d21b3d34SFangrui Song ts.tv_nsec = 1000;
19*d21b3d34SFangrui Song int res = ppoll(nullptr, 0, &ts, nullptr);
20*d21b3d34SFangrui Song assert(res == 0);
21*d21b3d34SFangrui Song
22*d21b3d34SFangrui Song if (T == 'A') {
23*d21b3d34SFangrui Song __msan_poison(&ts.tv_sec, sizeof(ts.tv_sec));
24*d21b3d34SFangrui Song ppoll(nullptr, 0, &ts, nullptr);
25*d21b3d34SFangrui Song // A: use-of-uninitialized-value
26*d21b3d34SFangrui Song }
27*d21b3d34SFangrui Song
28*d21b3d34SFangrui Song // A-NOT: ==1
29*d21b3d34SFangrui Song // B: ==1
30*d21b3d34SFangrui Song fprintf(stderr, "==1\n");
31*d21b3d34SFangrui Song
32*d21b3d34SFangrui Song sigset_t sig;
33*d21b3d34SFangrui Song if (T != 'B')
34*d21b3d34SFangrui Song sigemptyset(&sig);
35*d21b3d34SFangrui Song ppoll(nullptr, 0, &ts, &sig);
36*d21b3d34SFangrui Song // B: use-of-uninitialized-value
37*d21b3d34SFangrui Song
38*d21b3d34SFangrui Song // B-NOT: ==2
39*d21b3d34SFangrui Song // CLEAN: ==2
40*d21b3d34SFangrui Song fprintf(stderr, "==2\n");
41*d21b3d34SFangrui Song return 0;
42*d21b3d34SFangrui Song }
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