| 1 | // RUN: %clang_dfsan %s -mllvm -dfsan-combine-offset-labels-on-gep=false -Wno-error=int-conversion -o %t && %run %t |
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| 2 | // RUN: %clang_dfsan %s -DPROP_OFFSET_LABELS -Wno-error=int-conversion -o %t && %run %t |
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| 3 | |
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| 4 | // Tests that labels are propagated through GEP. |
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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 | int i = 1; |
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| 11 | int *p = &i; |
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| 12 | int j = 2; |
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| 13 | // test that pointer arithmetic propagates labels in terms of the flag. |
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| 14 | dfsan_set_label(label: 1, addr: &i, size: sizeof(i)); |
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| 15 | p += i; |
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| 16 | #ifdef PROP_OFFSET_LABELS |
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| 17 | assert(dfsan_get_label(p) == 1); |
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| 18 | #else |
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| 19 | assert(dfsan_get_label(p) == 0); |
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| 20 | #endif |
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| 21 | // test that non-pointer operations always propagate labels. |
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| 22 | dfsan_set_label(label: 2, addr: &j, size: sizeof(j)); |
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| 23 | j += i; |
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| 24 | assert(dfsan_get_label(j) == 3); |
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| 25 | return 0; |
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| 26 | } |
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| 27 | |
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