| 1 | // RUN: %clang_hwasan -O0 -DNEGATIVE %s -o %t && %run %t 2>&1 |
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| 2 | // RUN: %clang_hwasan -O0 %s -o %t && not %run %t 2>&1 | FileCheck %s |
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| 3 | |
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| 4 | // REQUIRES: pointer-tagging |
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| 5 | |
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| 6 | #include <stdlib.h> |
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| 7 | #include <assert.h> |
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| 8 | #include <sanitizer/hwasan_interface.h> |
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| 9 | |
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| 10 | __attribute__((noinline)) |
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| 11 | int f(void *caller_frame) { |
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| 12 | int z = 0; |
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| 13 | int *volatile p = &z; |
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| 14 | // Tag of local is never zero. |
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| 15 | assert(__hwasan_tag_pointer(p, 0) != p); |
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| 16 | #ifndef NEGATIVE |
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| 17 | // This will destroy shadow of "z", and the following load will crash. |
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| 18 | __hwasan_handle_longjmp(sp_dst: caller_frame); |
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| 19 | #endif |
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| 20 | return p[0]; |
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| 21 | } |
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| 22 | |
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| 23 | int main() { |
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| 24 | return f(caller_frame: __builtin_frame_address(0)); |
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| 25 | // CHECK: READ of size 8 at {{.*}} tags: {{.*}}/00 (ptr/mem) |
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| 26 | } |
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| 27 | |
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