1// RUN: %clang_dfsan -m64 %s -o %t && %run %t
2// RUN: %clang_dfsan -mllvm -dfsan-args-abi -m64 %s -o %t && %run %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
10int 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}
48