1 // This test requires operator new to be intercepted by the hwasan runtime,
2 // so we need to avoid linking against libc++.
3 // RUN: %clangxx_hwasan %s -nostdlib++ -lstdc++ -o %t
4 // RUN: %env_hwasan_opts=allocator_may_return_null=0 not %run %t malloc 2>&1          | FileCheck %s --check-prefix=CHECK-max
5 // RUN: %env_hwasan_opts=allocator_may_return_null=1     %run %t malloc 2>&1
6 // RUN: %env_hwasan_opts=allocator_may_return_null=0 not %run %t malloc max 2>&1      | FileCheck %s --check-prefix=CHECK-max
7 // RUN: %env_hwasan_opts=allocator_may_return_null=1     %run %t malloc max 2>&1
8 // RUN: %env_hwasan_opts=allocator_may_return_null=0 not %run %t calloc 2>&1          | FileCheck %s --check-prefix=CHECK-calloc
9 // RUN: %env_hwasan_opts=allocator_may_return_null=1     %run %t calloc 2>&1
10 // RUN: %env_hwasan_opts=allocator_may_return_null=0 not %run %t new 2>&1             | FileCheck %s --check-prefix=CHECK-max
11 // RUN: %env_hwasan_opts=allocator_may_return_null=1 not %run %t new 2>&1             | FileCheck %s --check-prefix=CHECK-oom
12 // RUN: %env_hwasan_opts=allocator_may_return_null=0 not %run %t new max 2>&1         | FileCheck %s --check-prefix=CHECK-max
13 // RUN: %env_hwasan_opts=allocator_may_return_null=1 not %run %t new max 2>&1         | FileCheck %s --check-prefix=CHECK-oom
14 // RUN: %env_hwasan_opts=allocator_may_return_null=0 not %run %t new-nothrow 2>&1     | FileCheck %s --check-prefix=CHECK-max
15 // RUN: %env_hwasan_opts=allocator_may_return_null=1     %run %t new-nothrow 2>&1
16 // RUN: %env_hwasan_opts=allocator_may_return_null=0 not %run %t new-nothrow max 2>&1 | FileCheck %s --check-prefix=CHECK-max
17 // RUN: %env_hwasan_opts=allocator_may_return_null=1     %run %t new-nothrow max 2>&1
18 // RUN:                                                 %run %t usable 2>&1
19 
20 // Tests for various edge cases related to sizes, notably the maximum size the
21 // allocator can allocate. Tests that an integer overflow in the parameters of
22 // calloc is caught.
23 
24 #include <assert.h>
25 #include <malloc.h>
26 #include <stdlib.h>
27 #include <string.h>
28 
29 #include <limits>
30 #include <new>
31 
32 #include <sanitizer/allocator_interface.h>
33 
34 int main(int argc, char **argv) {
35   assert(argc <= 3);
36   bool test_size_max = argc == 3 && !strcmp(argv[2], "max");
37 
38   static const size_t kMaxAllowedMallocSize = 1ULL << 40;
39   static const size_t kChunkHeaderSize = 16;
40 
41   size_t MallocSize = test_size_max ? std::numeric_limits<size_t>::max()
42                                     : kMaxAllowedMallocSize;
43 
44   if (!strcmp(argv[1], "malloc")) {
45     void *p = malloc(MallocSize);
46     assert(!p);
47     p = malloc(kMaxAllowedMallocSize - kChunkHeaderSize);
48     assert(!p);
49   } else if (!strcmp(argv[1], "calloc")) {
50     // Trigger an overflow in calloc.
51     size_t size = std::numeric_limits<size_t>::max();
52     void *p = calloc((size / 0x1000) + 1, 0x1000);
53     assert(!p);
54   } else if (!strcmp(argv[1], "new")) {
55     void *p = operator new(MallocSize);
56     assert(!p);
57   } else if (!strcmp(argv[1], "new-nothrow")) {
58     void *p = operator new(MallocSize, std::nothrow);
59     assert(!p);
60   } else if (!strcmp(argv[1], "usable")) {
61     // Playing with the actual usable size of a chunk.
62     void *p = malloc(1007);
63     assert(p);
64     size_t size = __sanitizer_get_allocated_size(p);
65     assert(size >= 1007);
66     memset(p, 'A', size);
67     p = realloc(p, 2014);
68     assert(p);
69     size = __sanitizer_get_allocated_size(p);
70     assert(size >= 2014);
71     memset(p, 'B', size);
72     free(p);
73   } else {
74     assert(0);
75   }
76 
77   return 0;
78 }
79 
80 // CHECK-max: {{ERROR: HWAddressSanitizer: requested allocation size .* exceeds maximum supported size}}
81 // CHECK-oom: ERROR: HWAddressSanitizer: allocator is out of memory
82 // CHECK-calloc: ERROR: HWAddressSanitizer: calloc parameters overflow
83