compiler-rt/test/asan/TestCases/zero_page_pc.cpp

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