| 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 | |
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| 6 | typedef struct S1 { |
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| 7 | int i1; |
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| 8 | } s1; |
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| 9 | typedef struct S2 { |
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| 10 | int i2; |
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| 11 | } s2; |
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| 12 | |
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| 13 | void g(int *i) { |
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| 14 | *i = 5; |
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| 15 | printf(format: "%i\n" , *i); |
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| 16 | } |
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| 17 | |
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| 18 | void h(char *c) { |
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| 19 | *c = 5; |
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| 20 | printf(format: "%i\n" , (int)*c); |
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| 21 | } |
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| 22 | |
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| 23 | void f(s1 *s1p, s2 *s2p) { |
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| 24 | s1p->i1 = 2; |
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| 25 | s2p->i2 = 3; |
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| 26 | // CHECK: ERROR: TypeSanitizer: type-aliasing-violation |
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| 27 | // CHECK: WRITE of size 4 at {{.*}} with type int (in S2 at offset 0) accesses an existing object of type int (in S1 at offset 0) |
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| 28 | // CHECK: {{#0 0x.* in f .*struct.c:}}[[@LINE-3]] |
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| 29 | printf(format: "%i\n" , s1p->i1); |
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| 30 | } |
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| 31 | |
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| 32 | int main() { |
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| 33 | s1 s = {.i1 = 1}; |
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| 34 | f(s1p: &s, s2p: (s2 *)&s); |
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| 35 | g(i: &s.i1); |
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| 36 | h(c: (char *)&s.i1); |
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| 37 | } |
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| 38 | |
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| 39 | // CHECK-NOT: ERROR: TypeSanitizer: type-aliasing-violation |
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| 40 | |
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