compiler-rt/test/dfsan/fncall.c

   1 // RUN: %clang_dfsan %s -o %t && %run %t
   2 //
   3 // REQUIRES: x86_64-target-arch
   4 //
   5 // Tests that labels are propagated through function calls.
   6
   7 #include <sanitizer/dfsan_interface.h>
   8 #include <assert.h>
   9
  10 int f(int x) {
  11   int j = 2;
  12   dfsan_label j_label = 2;
  13   dfsan_set_label(j_label, &j, sizeof(j));
  14   return x + j;
  15 }
  16
  17 int main(void) {
  18   int i = 1;
  19   dfsan_label i_label = 4;
  20   dfsan_set_label(i_label, &i, sizeof(i));
  21
  22   dfsan_label ij_label = dfsan_get_label(f(i));
  23   assert(dfsan_has_label(ij_label, i_label));
  24
  25   /* Must be consistent with the one in f(). */
  26   dfsan_label j_label = 2;
  27   assert(dfsan_has_label(ij_label, 2));
  28
  29   return 0;
  30 }