compiler-rt/test/ubsan/TestCases/Pointer/unsigned-index-expression.cpp

   1 // RUN: %clangxx -std=c++11 -fsanitize=pointer-overflow %s -o %t
   2 // RUN: %run %t 2>&1 | FileCheck %s --implicit-check-not="runtime error:"
   3
   4 int main(int argc, char *argv[]) {
   5   char c;
   6   char *p = &c;
   7   unsigned long long neg_1 = -1;
   8
   9   // CHECK: unsigned-index-expression.cpp:[[@LINE+1]]:15: runtime error: addition of unsigned offset to 0x{{.*}} overflowed to 0x{{.*}}
  10   char *q = p + neg_1;
  11
  12   // CHECK: unsigned-index-expression.cpp:[[@LINE+1]]:16: runtime error: subtraction of unsigned offset from 0x{{.*}} overflowed to 0x{{.*}}
  13   char *q1 = p - neg_1;
  14
  15   // CHECK: unsigned-index-expression.cpp:[[@LINE+2]]:16: runtime error: applying non-zero offset {{.*}} to null pointer
  16   char *n = nullptr;
  17   char *q2 = n - 1ULL;
  18
  19   return 0;
  20 }