| 1 | // RUN: %clang_tysan -O0 %s -o %t && %run %t >%t.out 2>&1 |
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| 2 | // RUN: FileCheck %s < %t.out |
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| 3 | |
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| 4 | #include <stdio.h> |
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| 5 | #include <stdlib.h> |
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| 6 | |
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| 7 | struct X { |
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| 8 | int i; |
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| 9 | int j; |
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| 10 | }; |
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| 11 | |
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| 12 | int foo(struct X *p, struct X *q) { |
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| 13 | q->j = 1; |
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| 14 | p->i = 0; |
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| 15 | // CHECK: ERROR: TypeSanitizer: type-aliasing-violation |
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| 16 | // CHECK: WRITE of size 4 at {{.*}} with type int (in X at offset 0) accesses an existing object of type int (in X at offset 4) |
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| 17 | // CHECK: {{#0 0x.* in foo .*struct-offset.c:}}[[@LINE-3]] |
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| 18 | return q->j; |
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| 19 | } |
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| 20 | |
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| 21 | int main() { |
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| 22 | unsigned char *p = malloc(size: 3 * sizeof(int)); |
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| 23 | printf(format: "%i\n" , foo(p: (struct X *)(p + sizeof(int)), q: (struct X *)p)); |
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| 24 | } |
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| 25 | |
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| 26 | // CHECK-NOT: ERROR: TypeSanitizer: type-aliasing-violation |
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| 27 | |
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