test/dfsan/propagate.c

   1 // RUN: %clang_dfsan -m64 %s -o %t && %t
   2 // RUN: %clang_dfsan -mllvm -dfsan-args-abi -m64 %s -o %t && %t
   3
   4 // Tests that labels are propagated through computation and that union labels
   5 // are properly created.
   6
   7 #include <sanitizer/dfsan_interface.h>
   8 #include <assert.h>
   9
  10 int main(void) {
  11   assert(dfsan_union(0, 0) == 0);
  12
  13   int i = 1;
  14   dfsan_label i_label = dfsan_create_label("i", 0);
  15   dfsan_set_label(i_label, &i, sizeof(i));
  16
  17   int j = 2;
  18   dfsan_label j_label = dfsan_create_label("j", 0);
  19   dfsan_set_label(j_label, &j, sizeof(j));
  20
  21   int k = 3;
  22   dfsan_label k_label = dfsan_create_label("k", 0);
  23   dfsan_set_label(k_label, &k, sizeof(k));
  24
  25   int k2 = 4;
  26   dfsan_set_label(k_label, &k2, sizeof(k2));
  27
  28   dfsan_label ij_label = dfsan_get_label(i + j);
  29   assert(dfsan_has_label(ij_label, i_label));
  30   assert(dfsan_has_label(ij_label, j_label));
  31   assert(!dfsan_has_label(ij_label, k_label));
  32   // Test uniquing.
  33   assert(dfsan_union(i_label, j_label) == ij_label);
  34   assert(dfsan_union(j_label, i_label) == ij_label);
  35
  36   dfsan_label ijk_label = dfsan_get_label(i + j + k);
  37   assert(dfsan_has_label(ijk_label, i_label));
  38   assert(dfsan_has_label(ijk_label, j_label));
  39   assert(dfsan_has_label(ijk_label, k_label));
  40
  41   assert(dfsan_get_label(k + k2) == k_label);
  42
  43   struct { int i, j; } s = { i, j };
  44   assert(dfsan_read_label(&s, sizeof(s)) == ij_label);
  45
  46   return 0;
  47 }