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 
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