| 1 | // RUN: %clangxx_msan -O0 -g %s -o %t && %run %t |
|---|---|
| 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 |