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      1 // RUN: %clangxx_asan -O0 %s -o %t && not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-%os --check-prefix=CHECK
      2 // RUN: %clangxx_asan -O1 %s -o %t && not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-%os --check-prefix=CHECK
      3 // RUN: %clangxx_asan -O2 %s -o %t && not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-%os --check-prefix=CHECK
      4 // RUN: %clangxx_asan -O3 %s -o %t && not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-%os --check-prefix=CHECK
      5 
      6 __attribute__((noinline))
      7 static void NullDeref(int *ptr) {
      8   // CHECK: ERROR: AddressSanitizer: SEGV on unknown address
      9   // CHECK:   {{0x0*000.. .*pc 0x.*}}
     10   ptr[10]++;  // BOOM
     11   // atos on Mac cannot extract the symbol name correctly.
     12   // CHECK-Linux: {{    #0 0x.* in NullDeref.*null_deref.cc:}}[[@LINE-2]]
     13   // CHECK-Darwin: {{    #0 0x.* in .*NullDeref.*null_deref.cc:}}[[@LINE-3]]
     14 }
     15 int main() {
     16   NullDeref((int*)0);
     17   // CHECK: {{    #1 0x.* in main.*null_deref.cc:}}[[@LINE-1]]
     18   // CHECK: {{AddressSanitizer can not provide additional info.}}
     19 }
     20