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
9int bar(char *p, char *q) {
10 return p - q;
11}
12
13char global[10000] = {};
14
15int main() {
16 // Heap allocated memory.
17 char *p = (char *)malloc(size: 42);
18 int r = bar(p, q: p + 20);
19 free(ptr: p);
20
21 // Global variable.
22 bar(p: &global[0], q: &global[100]);
23 bar(p: &global[1000], q: &global[9000]);
24 bar(p: &global[500], q: &global[10]);
25 bar(p: &global[0], q: &global[10000]);
26
27 // Stack variable.
28 char stack[10000];
29 bar(p: &stack[0], q: &stack[100]);
30 bar(p: &stack[1000], q: &stack[9000]);
31 bar(p: &stack[500], q: &stack[10]);
32
33 return 0;
34}
35

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