| 1 | // REQUIRES: gwp_asan |
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| 2 | // RUN: %clangxx_gwp_asan %s -o %t |
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| 3 | // RUN: %expect_crash %run %t 2>&1 | FileCheck %s |
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| 4 | |
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| 5 | // RUN: %clangxx_gwp_asan %s -o %t -DTOUCH_GUARD_PAGE |
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| 6 | // RUN: %expect_crash %run %t 2>&1 | FileCheck %s |
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| 7 | |
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| 8 | // CHECK: GWP-ASan detected a memory error |
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| 9 | // CHECK: Use After Free |
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| 10 | // CHECK-SAME: warning: buffer overflow/underflow detected on a free()'d allocation |
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| 11 | // CHECK-SAME: at 0x{{[a-f0-9]+}} (1 byte to the left |
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| 12 | |
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| 13 | #include <cstdlib> |
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| 14 | |
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| 15 | #include "page_size.h" |
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| 16 | |
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| 17 | int main() { |
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| 18 | unsigned malloc_size = 1; |
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| 19 | #ifdef TOUCH_GUARD_PAGE |
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| 20 | malloc_size = pageSize(); |
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| 21 | #endif // TOUCH_GUARD_PAGE |
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| 22 | char *Ptr = reinterpret_cast<char *>(malloc(malloc_size)); |
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| 23 | free(Ptr); |
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| 24 | volatile char x = *(Ptr - 1); |
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| 25 | return 0; |
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| 26 | } |
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| 27 | |
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