| // RUN: %clangxx_msan -m64 -O0 -g %s -o %t && %t |
| // RUN: %clangxx_msan -m64 -O3 -g %s -o %t && %t |
| |
| // RUN: %clangxx_msan -DPOSITIVE -m64 -O0 -g %s -o %t && not %t 2>&1 | FileCheck %s |
| // RUN: %clangxx_msan -DPOSITIVE -m64 -O3 -g %s -o %t && not %t 2>&1 | FileCheck %s |
| |
| #include <assert.h> |
| #include <stdlib.h> |
| #include <net/if.h> |
| #include <stdio.h> |
| #include <string.h> |
| #include <sys/ioctl.h> |
| #include <sys/socket.h> |
| #include <unistd.h> |
| |
| int main(int argc, char **argv) { |
| int fd = socket(AF_INET, SOCK_STREAM, 0); |
| |
| struct ifreq ifreqs[20]; |
| struct ifconf ifc; |
| ifc.ifc_ifcu.ifcu_req = ifreqs; |
| #ifndef POSITIVE |
| ifc.ifc_len = sizeof(ifreqs); |
| #endif |
| int res = ioctl(fd, SIOCGIFCONF, (void *)&ifc); |
| // CHECK: UMR in ioctl{{.*}} at offset 0 |
| // CHECK: WARNING: MemorySanitizer: use-of-uninitialized-value |
| // CHECK: #{{.*}} in main {{.*}}ioctl_custom.cc:[[@LINE-3]] |
| assert(res == 0); |
| for (int i = 0; i < ifc.ifc_len / sizeof(*ifc.ifc_ifcu.ifcu_req); ++i) |
| printf("%d %zu %s\n", i, strlen(ifreqs[i].ifr_name), ifreqs[i].ifr_name); |
| return 0; |
| } |