compiler-rt/test/asan/TestCases/global-underflow.cpp

   1 // RUN: %clangxx_asan -O0 %s %p/Helpers/underflow.cpp -o %t && not %run %t 2>&1 | FileCheck %s
   2 // RUN: %clangxx_asan -O1 %s %p/Helpers/underflow.cpp -o %t && not %run %t 2>&1 | FileCheck %s
   3 // RUN: %clangxx_asan -O2 %s %p/Helpers/underflow.cpp -o %t && not %run %t 2>&1 | FileCheck %s
   4 // RUN: %clangxx_asan -O3 %s %p/Helpers/underflow.cpp -o %t && not %run %t 2>&1 | FileCheck %s
   5
   6 int XXX[2] = {2, 3};
   7 extern int YYY[];
   8 #include <string.h>
   9 int main(int argc, char **argv) {
  10   memset(XXX, 0, 2*sizeof(int));
  11   // CHECK: {{READ of size 4 at 0x.* thread T0}}
  12   // CHECK: {{    #0 0x.* in main .*global-underflow.cpp:}}[[@LINE+3]]
  13   // CHECK: {{0x.* is located 4 bytes before global variable}}
  14   // CHECK:   {{.*YYY.* of size 12}}
  15   int res = YYY[-1];
  16   return res;
  17 }