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