37 lines · cpp
1// RUN: %clangxx_msan -O0 -g %s -o %t && %run %t2// RUN: %clangxx_msan -O3 -g %s -o %t && %run %t3 4// RUN: %clangxx_msan -DPOSITIVE -O0 -g %s -o %t && not %run %t 2>&1 | FileCheck %s5// RUN: %clangxx_msan -DPOSITIVE -O3 -g %s -o %t && not %run %t 2>&1 | FileCheck %s6 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 19int main(int argc, char **argv) {20 int fd = socket(AF_UNIX, SOCK_STREAM, 0);21 22 struct ifreq ifreqs[20];23 struct ifconf ifc;24 ifc.ifc_ifcu.ifcu_req = ifreqs;25#ifndef POSITIVE26 ifc.ifc_len = sizeof(ifreqs);27#endif28 int res = ioctl(fd, SIOCGIFCONF, (void *)&ifc);29 // CHECK: Uninitialized bytes in ioctl{{.*}} at offset 0 inside [0x{{.*}}, 4)30 // CHECK: WARNING: MemorySanitizer: use-of-uninitialized-value31 // 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("%d %zu %s\n", i, strlen(ifreqs[i].ifr_name), ifreqs[i].ifr_name);35 return 0;36}37