1*d21b3d34SFangrui Song // RUN: %clangxx_msan -O0 -g %s -o %t && %run %t
2*d21b3d34SFangrui Song // RUN: %clangxx_msan -O3 -g %s -o %t && %run %t
3*d21b3d34SFangrui Song
4*d21b3d34SFangrui Song // RUN: %clangxx_msan -DPOSITIVE -O0 -g %s -o %t && not %run %t 2>&1 | FileCheck %s
5*d21b3d34SFangrui Song // RUN: %clangxx_msan -DPOSITIVE -O3 -g %s -o %t && not %run %t 2>&1 | FileCheck %s
6*d21b3d34SFangrui Song
7*d21b3d34SFangrui Song // Reports different report (not analyzed)
8*d21b3d34SFangrui Song // XFAIL: netbsd
9*d21b3d34SFangrui Song
10*d21b3d34SFangrui Song #include <assert.h>
11*d21b3d34SFangrui Song #include <stdlib.h>
12*d21b3d34SFangrui Song #include <net/if.h>
13*d21b3d34SFangrui Song #include <stdio.h>
14*d21b3d34SFangrui Song #include <string.h>
15*d21b3d34SFangrui Song #include <sys/ioctl.h>
16*d21b3d34SFangrui Song #include <sys/socket.h>
17*d21b3d34SFangrui Song #include <unistd.h>
18*d21b3d34SFangrui Song
main(int argc,char ** argv)19*d21b3d34SFangrui Song int main(int argc, char **argv) {
20*d21b3d34SFangrui Song int fd = socket(AF_UNIX, SOCK_STREAM, 0);
21*d21b3d34SFangrui Song
22*d21b3d34SFangrui Song struct ifreq ifreqs[20];
23*d21b3d34SFangrui Song struct ifconf ifc;
24*d21b3d34SFangrui Song ifc.ifc_ifcu.ifcu_req = ifreqs;
25*d21b3d34SFangrui Song #ifndef POSITIVE
26*d21b3d34SFangrui Song ifc.ifc_len = sizeof(ifreqs);
27*d21b3d34SFangrui Song #endif
28*d21b3d34SFangrui Song int res = ioctl(fd, SIOCGIFCONF, (void *)&ifc);
29*d21b3d34SFangrui Song // CHECK: Uninitialized bytes in ioctl{{.*}} at offset 0 inside [0x{{.*}}, 4)
30*d21b3d34SFangrui Song // CHECK: WARNING: MemorySanitizer: use-of-uninitialized-value
31*d21b3d34SFangrui Song // CHECK: #{{.*}} in main {{.*}}ioctl_custom.cpp:[[@LINE-3]]
32*d21b3d34SFangrui Song assert(res == 0);
33*d21b3d34SFangrui Song for (int i = 0; i < ifc.ifc_len / sizeof(*ifc.ifc_ifcu.ifcu_req); ++i)
34*d21b3d34SFangrui Song printf("%d %zu %s\n", i, strlen(ifreqs[i].ifr_name), ifreqs[i].ifr_name);
35*d21b3d34SFangrui Song return 0;
36*d21b3d34SFangrui Song }
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