derek.holloway
7502bf64a4
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92 lines
2.1 KiB
C
92 lines
2.1 KiB
C
// RUN: %clang_dfsan %s -O1 -o %t && %run %t
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// RUN: %clang_dfsan %s -O0 -DO0 -o %t && %run %t
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#include <assert.h>
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#include <sanitizer/dfsan_interface.h>
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// SystemZ identifies labels for struct elements precisely across all
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// optimization labels.
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typedef struct Pair {
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int i;
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char *ptr;
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} Pair;
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__attribute__((noinline))
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Pair make_pair(int i, char *ptr) {
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Pair pair;
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pair.i = i;
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pair.ptr = ptr;
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return pair;
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}
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__attribute__((noinline))
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Pair copy_pair1(const Pair *pair0) {
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Pair pair;
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pair.i = pair0->i;
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pair.ptr = pair0->ptr;
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return pair;
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}
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__attribute__((noinline))
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Pair copy_pair2(const Pair pair0) {
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Pair pair;
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pair.i = pair0.i;
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pair.ptr = pair0.ptr;
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return pair;
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}
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int main(void) {
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int i = 1;
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char *ptr = NULL;
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dfsan_label i_label = 1;
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dfsan_label ptr_label = 2;
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dfsan_set_label(i_label, &i, sizeof(i));
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dfsan_set_label(ptr_label, &ptr, sizeof(ptr));
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Pair pair1 = make_pair(i, ptr);
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int i1 = pair1.i;
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char *ptr1 = pair1.ptr;
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dfsan_label i1_label = dfsan_read_label(&i1, sizeof(i1));
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dfsan_label ptr1_label = dfsan_read_label(&ptr1, sizeof(ptr1));
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#if defined(O0) && !defined(__s390x__)
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assert(i1_label == (i_label | ptr_label));
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assert(ptr1_label == (i_label | ptr_label));
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#else
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assert(i1_label == i_label);
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assert(ptr1_label == ptr_label);
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#endif
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Pair pair2 = copy_pair1(&pair1);
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int i2 = pair2.i;
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char *ptr2 = pair2.ptr;
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dfsan_label i2_label = dfsan_read_label(&i2, sizeof(i2));
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dfsan_label ptr2_label = dfsan_read_label(&ptr2, sizeof(ptr2));
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#if defined(O0) && !defined(__s390x__)
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assert(i2_label == (i_label | ptr_label));
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assert(ptr2_label == (i_label | ptr_label));
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#else
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assert(i2_label == i_label);
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assert(ptr2_label == ptr_label);
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#endif
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Pair pair3 = copy_pair2(pair1);
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int i3 = pair3.i;
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char *ptr3 = pair3.ptr;
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dfsan_label i3_label = dfsan_read_label(&i3, sizeof(i3));
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dfsan_label ptr3_label = dfsan_read_label(&ptr3, sizeof(ptr3));
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#if defined(O0) && !defined(__s390x__)
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assert(i3_label == (i_label | ptr_label));
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assert(ptr3_label == (i_label | ptr_label));
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#else
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assert(i3_label == i_label);
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assert(ptr3_label == ptr_label);
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#endif
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return 0;
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}
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