forked from OSchip/llvm-project
34 lines
1.1 KiB
C++
34 lines
1.1 KiB
C++
// RUN: %clangxx_msan -O0 -g %s -o %t && %run %t
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// RUN: %clangxx_msan -O3 -g %s -o %t && %run %t
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// RUN: %clangxx_msan -DPOSITIVE -O0 -g %s -o %t && not %run %t 2>&1 | FileCheck %s
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// RUN: %clangxx_msan -DPOSITIVE -O3 -g %s -o %t && not %run %t 2>&1 | FileCheck %s
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#include <assert.h>
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#include <stdlib.h>
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#include <net/if.h>
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#include <stdio.h>
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#include <string.h>
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#include <sys/ioctl.h>
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#include <sys/socket.h>
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#include <unistd.h>
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int main(int argc, char **argv) {
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int fd = socket(AF_UNIX, SOCK_STREAM, 0);
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struct ifreq ifreqs[20];
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struct ifconf ifc;
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ifc.ifc_ifcu.ifcu_req = ifreqs;
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#ifndef POSITIVE
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ifc.ifc_len = sizeof(ifreqs);
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#endif
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int res = ioctl(fd, SIOCGIFCONF, (void *)&ifc);
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// CHECK: Uninitialized bytes in ioctl{{.*}} at offset 0 inside [0x{{.*}}, 4)
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// CHECK: WARNING: MemorySanitizer: use-of-uninitialized-value
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// CHECK: #{{.*}} in main {{.*}}ioctl_custom.cc:[[@LINE-3]]
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assert(res == 0);
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for (int i = 0; i < ifc.ifc_len / sizeof(*ifc.ifc_ifcu.ifcu_req); ++i)
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printf("%d %zu %s\n", i, strlen(ifreqs[i].ifr_name), ifreqs[i].ifr_name);
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return 0;
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}
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