compiler-rt/test/asan/TestCases/invalid-pointer-pairs-subtract-success.cpp

   1 // RUN: %clangxx_asan -O0 %s -o %t -mllvm -asan-detect-invalid-pointer-pair
   2
   3 // RUN: %env_asan_opts=detect_invalid_pointer_pairs=2 %run %t
   4 // RUN: %env_asan_opts=detect_invalid_pointer_pairs=2,detect_stack_use_after_return=0 %run %t
   5
   6 #include <assert.h>
   7 #include <stdlib.h>
   8
   9 int bar(char *p, char *q) {
  10   return p - q;
  11 }
  12
  13 char global[10000] = {};
  14
  15 int main() {
  16   // Heap allocated memory.
  17   char *p = (char *)malloc(42);
  18   int r = bar(p, p + 20);
  19   free(p);
  20
  21   // Global variable.
  22   bar(&global[0], &global[100]);
  23   bar(&global[1000], &global[9000]);
  24   bar(&global[500], &global[10]);
  25   bar(&global[0], &global[10000]);
  26
  27   // Stack variable.
  28   char stack[10000];
  29   bar(&stack[0], &stack[100]);
  30   bar(&stack[1000], &stack[9000]);
  31   bar(&stack[500], &stack[10]);
  32
  33   return 0;
  34 }