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// RUN: %clangxx_msan -O0 -g %s -o %t && %run %t
// RUN: %clangxx_msan -O3 -g %s -o %t && %run %t
// RUN: %clangxx_msan -DPOSITIVE -O0 -g %s -o %t && not %run %t 2>&1 | FileCheck %s
// RUN: %clangxx_msan -DPOSITIVE -O3 -g %s -o %t && not %run %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_UNIX, 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: Uninitialized bytes in ioctl{{.*}} at offset 0 inside [0x{{.*}}, 4)
// 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;
}
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