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// RUN: %clang_dfsan %s -o %t && %run %t
// Tests that labels are propagated through computation and that union labels
// are properly created.
#include <sanitizer/dfsan_interface.h>
#include <assert.h>
int main(void) {
assert(dfsan_union(0, 0) == 0);
int i = 1;
dfsan_label i_label = 1;
dfsan_set_label(i_label, &i, sizeof(i));
int j = 2;
dfsan_label j_label = 2;
dfsan_set_label(j_label, &j, sizeof(j));
int k = 3;
dfsan_label k_label = 4;
dfsan_set_label(k_label, &k, sizeof(k));
int k2 = 4;
dfsan_set_label(k_label, &k2, sizeof(k2));
dfsan_label ij_label = dfsan_get_label(i + j);
assert(dfsan_has_label(ij_label, i_label));
assert(dfsan_has_label(ij_label, j_label));
assert(!dfsan_has_label(ij_label, k_label));
// Test uniquing.
assert(dfsan_union(i_label, j_label) == ij_label);
assert(dfsan_union(j_label, i_label) == ij_label);
dfsan_label ijk_label = dfsan_get_label(i + j + k);
assert(dfsan_has_label(ijk_label, i_label));
assert(dfsan_has_label(ijk_label, j_label));
assert(dfsan_has_label(ijk_label, k_label));
assert(dfsan_get_label(k + k2) == k_label);
struct { int i, j; } s = { i, j };
assert(dfsan_read_label(&s, sizeof(s)) == ij_label);
return 0;
}
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