compiler-rt/test/dfsan/force_zero.c

   1 // RUN: %clang_dfsan %s -fsanitize-ignorelist=%S/Inputs/flags_abilist.txt -DFORCE_ZERO_LABELS -o %t && %run %t
   2 // RUN: %clang_dfsan %s -o %t && %run %t
   3 //
   4 // REQUIRES: x86_64-target-arch
   5
   6 #include <sanitizer/dfsan_interface.h>
   7
   8 #include <assert.h>
   9
  10 int function_to_force_zero(int i, int* out) {
  11   *out = i;
  12   return i;
  13 }
  14
  15 int main(void) {
  16   int i = 1;
  17   dfsan_label i_label = 2;
  18   dfsan_set_label(i_label, &i, sizeof(i));
  19
  20   int out = 0;
  21   int ret = function_to_force_zero(i, &out);
  22
  23 #ifdef FORCE_ZERO_LABELS
  24   assert(dfsan_get_label(out) == 0);
  25   assert(dfsan_get_label(ret) == 0);
  26 #else
  27   assert(dfsan_get_label(out) == i_label);
  28   assert(dfsan_get_label(ret) == i_label);
  29 #endif
  30
  31   return 0;
  32 }