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// RUN: %clangxx_asan -O0 %s -o %t -mllvm -asan-detect-invalid-pointer-pair
// RUN: %env_asan_opts=detect_invalid_pointer_pairs=2 %run %t
#include <assert.h>
#include <stdlib.h>
int foo(char *p) {
char *p2 = p + 20;
return p > p2;
}
int bar(char *p, char *q) {
return p <= q;
}
int baz(char *p, char *q) {
return p != 0 && p < q;
}
char global[8192] = {};
char small_global[7] = {};
int main() {
// Heap allocated memory.
char *p = (char *)malloc(42);
int r = foo(p);
free(p);
p = (char *)malloc(1024);
bar(p, p + 1024);
bar(p + 1024, p + 1023);
bar(p + 1, p + 1023);
free(p);
p = (char *)malloc(4096);
bar(p, p + 4096);
bar(p + 10, p + 100);
bar(p + 1024, p + 4096);
bar(p + 4095, p + 4096);
bar(p + 4095, p + 4094);
bar(p + 100, p + 4096);
bar(p + 100, p + 4094);
free(p);
// Global variable.
bar(&global[0], &global[1]);
bar(&global[1], &global[2]);
bar(&global[2], &global[1]);
bar(&global[0], &global[100]);
bar(&global[1000], &global[7000]);
bar(&global[500], &global[10]);
p = &global[0];
bar(p, p + 8192);
p = &global[8000];
bar(p, p + 192);
p = &small_global[0];
bar(p, p + 1);
bar(p, p + 7);
bar(p + 7, p + 1);
bar(p + 6, p + 7);
bar(p + 7, p + 7);
// Stack variable.
char stack[10000];
bar(&stack[0], &stack[100]);
bar(&stack[1000], &stack[9000]);
bar(&stack[500], &stack[10]);
baz(0, &stack[10]);
return 0;
}
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