1 // RUN: %clangxx_scudo %s -lstdc++ -o %t
2 // RUN: %env_scudo_opts=allocator_may_return_null=0 not %run %t malloc 2>&1 | FileCheck %s --check-prefix=CHECK-max
3 // RUN: %env_scudo_opts=allocator_may_return_null=1 %run %t malloc 2>&1
4 // RUN: %env_scudo_opts=allocator_may_return_null=0 not %run %t calloc 2>&1 | FileCheck %s --check-prefix=CHECK-calloc
5 // RUN: %env_scudo_opts=allocator_may_return_null=1 %run %t calloc 2>&1
6 // RUN: %env_scudo_opts=allocator_may_return_null=0 not %run %t new 2>&1 | FileCheck %s --check-prefix=CHECK-max
7 // RUN: %env_scudo_opts=allocator_may_return_null=1 not %run %t new 2>&1 | FileCheck %s --check-prefix=CHECK-oom
8 // RUN: %env_scudo_opts=allocator_may_return_null=0 not %run %t new-nothrow 2>&1 | FileCheck %s --check-prefix=CHECK-max
9 // RUN: %env_scudo_opts=allocator_may_return_null=1 %run %t new-nothrow 2>&1
10 // RUN: %run %t usable 2>&1
11
12 // Tests for various edge cases related to sizes, notably the maximum size the
13 // allocator can allocate. Tests that an integer overflow in the parameters of
14 // calloc is caught.
15
16 #include <assert.h>
17 #include <malloc.h>
18 #include <stdlib.h>
19 #include <string.h>
20
21 #include <limits>
22 #include <new>
23
24 #include <sanitizer/allocator_interface.h>
25
main(int argc,char ** argv)26 int main(int argc, char **argv) {
27 assert(argc == 2);
28
29 #if __LP64__ || defined(_WIN64)
30 static const size_t kMaxAllowedMallocSize = 1ULL << 40;
31 static const size_t kChunkHeaderSize = 16;
32 #else
33 static const size_t kMaxAllowedMallocSize = 2UL << 30;
34 static const size_t kChunkHeaderSize = 8;
35 #endif
36
37 if (!strcmp(argv[1], "malloc")) {
38 void *p = malloc(kMaxAllowedMallocSize);
39 assert(!p);
40 p = malloc(kMaxAllowedMallocSize - kChunkHeaderSize);
41 assert(!p);
42 } else if (!strcmp(argv[1], "calloc")) {
43 // Trigger an overflow in calloc.
44 size_t size = std::numeric_limits<size_t>::max();
45 void *p = calloc((size / 0x1000) + 1, 0x1000);
46 assert(!p);
47 } else if (!strcmp(argv[1], "new")) {
48 void *p = operator new(kMaxAllowedMallocSize);
49 assert(!p);
50 } else if (!strcmp(argv[1], "new-nothrow")) {
51 void *p = operator new(kMaxAllowedMallocSize, std::nothrow);
52 assert(!p);
53 } else if (!strcmp(argv[1], "usable")) {
54 // Playing with the actual usable size of a chunk.
55 void *p = malloc(1007);
56 assert(p);
57 size_t size = __sanitizer_get_allocated_size(p);
58 assert(size >= 1007);
59 memset(p, 'A', size);
60 p = realloc(p, 2014);
61 assert(p);
62 size = __sanitizer_get_allocated_size(p);
63 assert(size >= 2014);
64 memset(p, 'B', size);
65 free(p);
66 } else {
67 assert(0);
68 }
69
70 return 0;
71 }
72
73 // CHECK-max: {{Scudo ERROR: requested allocation size .* exceeds maximum supported size}}
74 // CHECK-oom: Scudo ERROR: allocator is out of memory
75 // CHECK-calloc: Scudo ERROR: calloc parameters overflow
76