// RUN: %clangxx_msan -O0 -g %s -o %t // RUN: not %run %t 2>&1 | FileCheck %s // RUN: MSAN_OPTIONS=intercept_memcmp=0 %run %t #include #include int main(int argc, char **argv) { char a1[4]; char a2[4]; for (int i = 0; i < argc * 3; i++) a2[i] = a1[i] = i; int res = memcmp(a1, a2, 4); if (!res) printf("equals"); return 0; // CHECK: Uninitialized bytes in __interceptor_memcmp at offset 3 // CHECK: MemorySanitizer: use-of-uninitialized-value }