xref: /aosp_15_r20/external/compiler-rt/test/msan/memcmp_test.cc (revision 7c3d14c8b49c529e04be81a3ce6f5cc23712e4c6) 
1*7c3d14c8STreehugger Robot // RUN: %clangxx_msan -O0 -g %s -o %t
2*7c3d14c8STreehugger Robot // RUN: not %run %t 2>&1 | FileCheck %s
3*7c3d14c8STreehugger Robot // RUN: MSAN_OPTIONS=intercept_memcmp=0 %run %t
4*7c3d14c8STreehugger Robot 
5*7c3d14c8STreehugger Robot #include <string.h>
6*7c3d14c8STreehugger Robot #include <stdio.h>
main(int argc,char ** argv)7*7c3d14c8STreehugger Robot int main(int argc, char **argv) {
8*7c3d14c8STreehugger Robot   char a1[4];
9*7c3d14c8STreehugger Robot   char a2[4];
10*7c3d14c8STreehugger Robot   for (int i = 0; i < argc * 3; i++)
11*7c3d14c8STreehugger Robot     a2[i] = a1[i] = i;
12*7c3d14c8STreehugger Robot   int res = memcmp(a1, a2, 4);
13*7c3d14c8STreehugger Robot   if (!res)
14*7c3d14c8STreehugger Robot     printf("equals");
15*7c3d14c8STreehugger Robot   return 0;
16*7c3d14c8STreehugger Robot   // CHECK: Uninitialized bytes in __interceptor_memcmp at offset 3
17*7c3d14c8STreehugger Robot   // CHECK: MemorySanitizer: use-of-uninitialized-value
18*7c3d14c8STreehugger Robot }
19