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// Test for mmap/munmap interceptors.
// RUN: %clang_asan %s -o %t
// RUN: %run %t 2>&1
#include <assert.h>
#include <sanitizer/asan_interface.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/mman.h>
int main(int argc, char **argv) {
int size = 4096;
int val = 42;
// Get any mmaped pointer.
void *r =
mmap(0, size, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, -1, 0);
assert(r != MAP_FAILED);
// Make sure the memory is unpoisoned.
if (__asan_region_is_poisoned(r, size) != 0) {
fprintf(stderr, "Memory returned by mmap should be unpoisoned.\n");
abort();
}
// First munmmap and then mmap the same pointer using MAP_FIXED.
__asan_poison_memory_region(r, size);
munmap(r, size);
if (__asan_region_is_poisoned(r, size) != 0) {
fprintf(stderr, "Shadow memory was not cleaned by munmap.\n");
abort();
}
__asan_poison_memory_region(r, size);
void *p = mmap(r, size, PROT_READ | PROT_WRITE,
MAP_FIXED | MAP_ANON | MAP_PRIVATE, -1, 0);
assert(r == p);
// Make sure the memory is unpoisoned.
if (__asan_region_is_poisoned(r, size) != 0) {
fprintf(stderr, "Memory returned by mmap should be unpoisoned.\n");
abort();
}
return 0;
}
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