compiler-rt/test/ubsan_minimal/TestCases/local_bounds.cpp

   1 // RUN: %clangxx -fsanitize=local-bounds %s -O3 -o %t && %run %t 1
   2 // RUN: %clangxx -fsanitize=local-bounds %s -O3 -o %t && not --crash %run %t 3
   3 // RUN: %clangxx -fsanitize=local-bounds -fno-sanitize-trap=local-bounds %s -O3 -o %t && not --crash %run %t 3 2>&1 | FileCheck %s
   4 // RUN: %clangxx -fsanitize=local-bounds -fno-sanitize-trap=local-bounds -fsanitize-recover=local-bounds %s -O3 -o %t && %run %t 3 2>&1 | FileCheck %s
   5
   6 #include <cstdlib>
   7
   8 struct S {
   9   int k;
  10   int l;
  11 };
  12
  13 __attribute__((noinline)) void init(S *s) {
  14   __asm__ __volatile__("" : : "r"(s) : "memory");
  15 }
  16
  17 __attribute__((noinline, no_sanitize("memory"))) int test(char i) {
  18   S a;
  19   init(&a);
  20   S b;
  21   init(&b);
  22   return ((int *)(&a))[i];
  23   // CHECK: ubsan: local-out-of-bounds by 0x{{[[:xdigit:]]+$}}
  24 }
  25
  26 int main(int argc, char **argv) {
  27   test(argv[1][0] - '0');
  28   return 0;
  29 }