1 // RUN: %clang_dfsan %s -o %t && %run %t
2 //
3 // REQUIRES: x86_64-target-arch
4
5 // Tests that labels are propagated through computation and that union labels
6 // are properly created.
7
8 #include <sanitizer/dfsan_interface.h>
9 #include <assert.h>
10
main(void)11 int main(void) {
12 assert(dfsan_union(0, 0) == 0);
13
14 int i = 1;
15 dfsan_label i_label = 1;
16 dfsan_set_label(i_label, &i, sizeof(i));
17
18 int j = 2;
19 dfsan_label j_label = 2;
20 dfsan_set_label(j_label, &j, sizeof(j));
21
22 int k = 3;
23 dfsan_label k_label = 4;
24 dfsan_set_label(k_label, &k, sizeof(k));
25
26 int k2 = 4;
27 dfsan_set_label(k_label, &k2, sizeof(k2));
28
29 dfsan_label ij_label = dfsan_get_label(i + j);
30 assert(dfsan_has_label(ij_label, i_label));
31 assert(dfsan_has_label(ij_label, j_label));
32 assert(!dfsan_has_label(ij_label, k_label));
33 // Test uniquing.
34 assert(dfsan_union(i_label, j_label) == ij_label);
35 assert(dfsan_union(j_label, i_label) == ij_label);
36
37 dfsan_label ijk_label = dfsan_get_label(i + j + k);
38 assert(dfsan_has_label(ijk_label, i_label));
39 assert(dfsan_has_label(ijk_label, j_label));
40 assert(dfsan_has_label(ijk_label, k_label));
41
42 assert(dfsan_get_label(k + k2) == k_label);
43
44 struct { int i, j; } s = { i, j };
45 assert(dfsan_read_label(&s, sizeof(s)) == ij_label);
46
47 return 0;
48 }
49