1 // RUN: %clangxx_asan -O0 %s -o %t -mllvm -asan-detect-invalid-pointer-pair
2 
3 // RUN: %env_asan_opts=detect_invalid_pointer_pairs=1 %run %t
4 
5 #include <assert.h>
6 #include <stdlib.h>
7 
8 int foo(char *p, char *q) {
9   return p <= q;
10 }
11 
12 char global[8192] = {};
13 char small_global[7] = {};
14 
15 int main() {
16   // Heap allocated memory.
17   char *p = (char *)malloc(42);
18   int r = foo(p, NULL);
19   free(p);
20 
21   p = (char *)malloc(1024);
22   foo(NULL, p);
23   free(p);
24 
25   p = (char *)malloc(4096);
26   foo(p, NULL);
27   free(p);
28 
29   // Global variable.
30   foo(&global[0], NULL);
31   foo(&global[1000], NULL);
32 
33   p = &small_global[0];
34   foo(p, NULL);
35 
36   // Stack variable.
37   char stack[10000];
38   foo(&stack[0], NULL);
39   foo(NULL, &stack[9000]);
40 
41   return 0;
42 }
43