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