1 // RUN: %clang_scudo %s -o %t
2 // RUN: SCUDO_OPTIONS=allocator_may_return_null=0 not %run %t malloc 2>&1 | FileCheck %s
3 // RUN: SCUDO_OPTIONS=allocator_may_return_null=1 %run %t malloc 2>&1
4 // RUN: SCUDO_OPTIONS=allocator_may_return_null=0 not %run %t calloc 2>&1 | FileCheck %s
5 // RUN: SCUDO_OPTIONS=allocator_may_return_null=1 %run %t calloc 2>&1
6 // RUN: %run %t usable 2>&1
7
8 // Tests for various edge cases related to sizes, notably the maximum size the
9 // allocator can allocate. Tests that an integer overflow in the parameters of
10 // calloc is caught.
11
12 #include <assert.h>
13 #include <malloc.h>
14 #include <stdlib.h>
15 #include <string.h>
16
17 #include <limits>
18
main(int argc,char ** argv)19 int main(int argc, char **argv)
20 {
21 assert(argc == 2);
22 if (!strcmp(argv[1], "malloc")) {
23 // Currently the maximum size the allocator can allocate is 1ULL<<40 bytes.
24 size_t size = std::numeric_limits<size_t>::max();
25 void *p = malloc(size);
26 if (p)
27 return 1;
28 size = (1ULL << 40) - 16;
29 p = malloc(size);
30 if (p)
31 return 1;
32 }
33 if (!strcmp(argv[1], "calloc")) {
34 // Trigger an overflow in calloc.
35 size_t size = std::numeric_limits<size_t>::max();
36 void *p = calloc((size / 0x1000) + 1, 0x1000);
37 if (p)
38 return 1;
39 }
40 if (!strcmp(argv[1], "usable")) {
41 // Playing with the actual usable size of a chunk.
42 void *p = malloc(1007);
43 if (!p)
44 return 1;
45 size_t size = malloc_usable_size(p);
46 if (size < 1007)
47 return 1;
48 memset(p, 'A', size);
49 p = realloc(p, 2014);
50 if (!p)
51 return 1;
52 size = malloc_usable_size(p);
53 if (size < 2014)
54 return 1;
55 memset(p, 'B', size);
56 free(p);
57 }
58 return 0;
59 }
60
61 // CHECK: allocator is terminating the process
62