1 | // Test basic realloc functionality. |
2 | // RUN: %clang_hwasan %s -o %t && %run %t |
3 | // RUN: %clang_hwasan %s -DREALLOCARRAY -o %t && %run %t |
4 | |
5 | #include <assert.h> |
6 | #include <sanitizer/hwasan_interface.h> |
7 | #include <stdlib.h> |
8 | |
9 | #ifdef REALLOCARRAY |
10 | extern "C" void *reallocarray(void *, size_t nmemb, size_t size); |
11 | #define REALLOC(p, s) reallocarray(p, 1, s) |
12 | #else |
13 | #define REALLOC(p, s) realloc(p, s) |
14 | #endif |
15 | |
16 | int main() { |
17 | __hwasan_enable_allocator_tagging(); |
18 | char *x = (char*)REALLOC(nullptr, 4); |
19 | x[0] = 10; |
20 | x[1] = 20; |
21 | x[2] = 30; |
22 | x[3] = 40; |
23 | char *x1 = (char*)REALLOC(x, 5); |
24 | assert(x1 != x); // not necessary true for C, |
25 | // but true today for hwasan. |
26 | assert(x1[0] == 10 && x1[1] == 20 && x1[2] == 30 && x1[3] == 40); |
27 | x1[4] = 50; |
28 | |
29 | char *x2 = (char*)REALLOC(x1, 6); |
30 | x2[5] = 60; |
31 | assert(x2 != x1); |
32 | assert(x2[0] == 10 && x2[1] == 20 && x2[2] == 30 && x2[3] == 40 && |
33 | x2[4] == 50 && x2[5] == 60); |
34 | |
35 | char *x3 = (char*)REALLOC(x2, 6); |
36 | assert(x3 != x2); |
37 | assert(x3[0] == 10 && x3[1] == 20 && x3[2] == 30 && x3[3] == 40 && |
38 | x3[4] == 50 && x3[5] == 60); |
39 | |
40 | char *x4 = (char*)REALLOC(x3, 5); |
41 | assert(x4 != x3); |
42 | assert(x4[0] == 10 && x4[1] == 20 && x4[2] == 30 && x4[3] == 40 && |
43 | x4[4] == 50); |
44 | free(ptr: x4); |
45 | } |
46 | |