derek.holloway
7502bf64a4
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32 lines
1.0 KiB
C
32 lines
1.0 KiB
C
// RUN: %clang_tysan -O0 %s -o %t && %run %t >%t.out 2>&1
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// RUN: FileCheck %s < %t.out
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#include <stdlib.h>
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#include <string.h>
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float P;
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long L;
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int main() {
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*(int *)&P = 5;
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// CHECK: ERROR: TypeSanitizer: type-aliasing-violation
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// CHECK: WRITE of size 4 at {{.*}} with type int accesses an existing object of type float
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// CHECK: {{#0 0x.* in main .*global.c:}}[[@LINE-3]]
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void *mem = malloc(sizeof(long));
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*(int *)mem = 6;
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memcpy(mem, &L, sizeof(L));
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*(int *)mem = 8;
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// CHECK: ERROR: TypeSanitizer: type-aliasing-violation
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// CHECK: WRITE of size 4 at {{.*}} with type int accesses an existing object of type long
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// CHECK: {{#0 0x.* in main .*global.c:}}[[@LINE-3]]
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int r = *(((int *)mem) + 1);
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// CHECK: ERROR: TypeSanitizer: type-aliasing-violation
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// CHECK: READ of size 4 at {{.*}} with type int accesses part of an existing object of type long that starts at offset -4
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// CHECK: {{#0 0x.* in main .*global.c:}}[[@LINE-3]]
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free(mem);
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return r;
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}
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// CHECK-NOT: ERROR: TypeSanitizer: type-aliasing-violation
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