| 1 | // Check that ASan correctly detects SEGV on the zero page. |
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| 2 | // RUN: %clangxx_asan %s -o %t && not %run %t 2>&1 | FileCheck %s |
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| 3 | |
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| 4 | // Handled as a codesigning violation and exits with SIGKILL not SEGV |
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| 5 | // UNSUPPORTED: ios |
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| 6 | |
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| 7 | |
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| 8 | #if defined(_MSC_VER) && !defined(__CLANG__) |
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| 9 | # define __has_feature(x) 0 |
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| 10 | #endif |
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| 11 | |
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| 12 | #if __has_feature(ptrauth_calls) |
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| 13 | # include <ptrauth.h> |
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| 14 | #endif |
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| 15 | |
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| 16 | typedef void void_f(); |
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| 17 | int main() { |
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| 18 | void_f *func = (void_f *)0x4; |
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| 19 | #if __has_feature(ptrauth_calls) |
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| 20 | func = ptrauth_sign_unauthenticated( |
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| 21 | func, ptrauth_key_function_pointer, 0); |
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| 22 | #endif |
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| 23 | func(); |
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| 24 | // x86 reports the SEGV with both address=4 and pc=4. |
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| 25 | // On PowerPC64 ELFv1, the pointer is taken to be a function-descriptor |
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| 26 | // pointer out of which three 64-bit quantities are read. This will SEGV, but |
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| 27 | // the compiler is free to choose the order. As a result, the address is |
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| 28 | // either 0x4, 0xc or 0x14. The pc is still in main() because it has not |
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| 29 | // actually made the call when the faulting access occurs. |
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| 30 | // CHECK: {{AddressSanitizer: (SEGV|access-violation).*(address|pc) 0x0*[45c]}} |
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| 31 | return 0; |
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| 32 | } |
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| 33 | |
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