1 | // RUN: %clangxx_msan -O0 -g %s -o %t && %run %t |
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2 | // RUN: %clangxx_msan -O3 -g %s -o %t && %run %t |
3 | |
4 | // RUN: %clangxx_msan -DPOSITIVE -O0 -g %s -o %t && not %run %t 2>&1 | FileCheck %s |
5 | // RUN: %clangxx_msan -DPOSITIVE -O3 -g %s -o %t && not %run %t 2>&1 | FileCheck %s |
6 | |
7 | // Reports different report (not analyzed) |
8 | // XFAIL: target={{.*netbsd.*}} |
9 | |
10 | #include <assert.h> |
11 | #include <stdlib.h> |
12 | #include <net/if.h> |
13 | #include <stdio.h> |
14 | #include <string.h> |
15 | #include <sys/ioctl.h> |
16 | #include <sys/socket.h> |
17 | #include <unistd.h> |
18 | |
19 | int main(int argc, char **argv) { |
20 | int fd = socket(AF_UNIX, SOCK_STREAM, protocol: 0); |
21 | |
22 | struct ifreq ifreqs[20]; |
23 | struct ifconf ifc; |
24 | ifc.ifc_ifcu.ifcu_req = ifreqs; |
25 | #ifndef POSITIVE |
26 | ifc.ifc_len = sizeof(ifreqs); |
27 | #endif |
28 | int res = ioctl(fd: fd, SIOCGIFCONF, (void *)&ifc); |
29 | // CHECK: Uninitialized bytes in ioctl{{.*}} at offset 0 inside [0x{{.*}}, 4) |
30 | // CHECK: WARNING: MemorySanitizer: use-of-uninitialized-value |
31 | // CHECK: #{{.*}} in main {{.*}}ioctl_custom.cpp:[[@LINE-3]] |
32 | assert(res == 0); |
33 | for (int i = 0; i < ifc.ifc_len / sizeof(*ifc.ifc_ifcu.ifcu_req); ++i) |
34 | printf(format: "%d %zu %s\n", i, strlen(s: ifreqs[i].ifr_name), ifreqs[i].ifr_name); |
35 | return 0; |
36 | } |
37 |