35 lines · cpp
1// RUN: %clangxx_msan -g %s -o %t2// RUN: not %run %t 2>&1 | FileCheck %s3// RUN: %t 14 5#include <stdio.h>6#include <stdlib.h>7 8int test_fread() {9 FILE *f = fopen("/dev/zero", "r");10 char c;11 unsigned read = fread(&c, sizeof(c), 1, f);12 fclose(f);13 if (c == '1') // No error14 return 1;15 return 0;16}17 18int test_fwrite() {19 FILE *f = fopen("/dev/null", "w");20 char c;21 if (fwrite(&c, sizeof(c), 1, f) != sizeof(c)) // BOOM22 return 1;23 return fclose(f);24}25 26int main(int argc, char *argv[]) {27 if (argc > 1)28 test_fread();29 else30 test_fwrite();31 return 0;32}33 34// CHECK: Uninitialized bytes in fwrite at offset 0 inside35