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1a4d82fc JJ |
1 | // Test that LargeAllocator unpoisons memory before releasing it to the OS. |
2 | // RUN: %clangxx_asan %s -o %t | |
3 | // The memory is released only when the deallocated chunk leaves the quarantine, | |
4 | // otherwise the mmap(p, ...) call overwrites the malloc header. | |
5 | // RUN: ASAN_OPTIONS=quarantine_size=1 %run %t | |
6 | ||
7 | #include <assert.h> | |
8 | #include <string.h> | |
9 | #include <sys/mman.h> | |
10 | #include <stdlib.h> | |
11 | ||
12 | #ifdef __ANDROID__ | |
13 | #include <malloc.h> | |
14 | void *my_memalign(size_t boundary, size_t size) { | |
15 | return memalign(boundary, size); | |
16 | } | |
17 | #else | |
18 | void *my_memalign(size_t boundary, size_t size) { | |
19 | void *p; | |
20 | posix_memalign(&p, boundary, size); | |
21 | return p; | |
22 | } | |
23 | #endif | |
24 | ||
25 | int main() { | |
26 | const int kPageSize = 4096; | |
27 | void *p = my_memalign(kPageSize, 1024 * 1024); | |
28 | free(p); | |
29 | ||
30 | char *q = (char *)mmap(p, kPageSize, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANON | MAP_FIXED, 0, 0); | |
31 | assert(q == p); | |
32 | ||
33 | memset(q, 42, kPageSize); | |
34 | ||
35 | munmap(q, kPageSize); | |
36 | return 0; | |
37 | } |