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1// Test for mmap/munmap interceptors.2// RUN: %clang_asan %s -o %t3// RUN: %run %t 2>&14 5#include <assert.h>6#include <sanitizer/asan_interface.h>7#include <stdio.h>8#include <stdlib.h>9#include <sys/mman.h>10 11int main(int argc, char **argv) {12 int size = 4096;13 int val = 42;14 15 // Get any mmaped pointer.16 void *r =17 mmap(0, size, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, -1, 0);18 assert(r != MAP_FAILED);19 20 // Make sure the memory is unpoisoned.21 if (__asan_region_is_poisoned(r, size) != 0) {22 fprintf(stderr, "Memory returned by mmap should be unpoisoned.\n");23 abort();24 }25 26 // First munmmap and then mmap the same pointer using MAP_FIXED.27 __asan_poison_memory_region(r, size);28 munmap(r, size);29 if (__asan_region_is_poisoned(r, size) != 0) {30 fprintf(stderr, "Shadow memory was not cleaned by munmap.\n");31 abort();32 }33 __asan_poison_memory_region(r, size);34 void *p = mmap(r, size, PROT_READ | PROT_WRITE,35 MAP_FIXED | MAP_ANON | MAP_PRIVATE, -1, 0);36 assert(r == p);37 38 // Make sure the memory is unpoisoned.39 if (__asan_region_is_poisoned(r, size) != 0) {40 fprintf(stderr, "Memory returned by mmap should be unpoisoned.\n");41 abort();42 }43 44 return 0;45}46