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
26int 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(s1: argv[1], s2: "malloc")) {
38 void *p = malloc(size: kMaxAllowedMallocSize);
39 assert(!p);
40 p = malloc(size: kMaxAllowedMallocSize - kChunkHeaderSize);
41 assert(!p);
42 } else if (!strcmp(s1: argv[1], s2: "calloc")) {
43 // Trigger an overflow in calloc.
44 size_t size = std::numeric_limits<size_t>::max();
45 void *p = calloc(nmemb: (size / 0x1000) + 1, size: 0x1000);
46 assert(!p);
47 } else if (!strcmp(s1: argv[1], s2: "new")) {
48 void *p = operator new(kMaxAllowedMallocSize);
49 assert(!p);
50 } else if (!strcmp(s1: argv[1], s2: "new-nothrow")) {
51 void *p = operator new(kMaxAllowedMallocSize, std::nothrow);
52 assert(!p);
53 } else if (!strcmp(s1: argv[1], s2: "usable")) {
54 // Playing with the actual usable size of a chunk.
55 void *p = malloc(size: 1007);
56 assert(p);
57 size_t size = __sanitizer_get_allocated_size(p);
58 assert(size >= 1007);
59 memset(s: p, c: 'A', n: size);
60 p = realloc(ptr: p, size: 2014);
61 assert(p);
62 size = __sanitizer_get_allocated_size(p);
63 assert(size >= 2014);
64 memset(s: p, c: 'B', n: size);
65 free(ptr: 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

source code of compiler-rt/test/scudo/sizes.cpp