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 || %clangxx_hwasan %s -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 reallocarray 2>&1 | FileCheck %s --check-prefix=CHECK-reallocarray
11// RUN: %env_hwasan_opts=allocator_may_return_null=1 %run %t reallocarray 2>&1
12// RUN: %env_hwasan_opts=allocator_may_return_null=0 not %run %t new 2>&1 | FileCheck %s --check-prefix=CHECK-max
13// RUN: %env_hwasan_opts=allocator_may_return_null=1 not %run %t new 2>&1 | FileCheck %s --check-prefix=CHECK-oom
14// RUN: %env_hwasan_opts=allocator_may_return_null=0 not %run %t new max 2>&1 | FileCheck %s --check-prefix=CHECK-max
15// RUN: %env_hwasan_opts=allocator_may_return_null=1 not %run %t new max 2>&1 | FileCheck %s --check-prefix=CHECK-oom
16// RUN: %env_hwasan_opts=allocator_may_return_null=0 not %run %t new-nothrow 2>&1 | FileCheck %s --check-prefix=CHECK-max
17// RUN: %env_hwasan_opts=allocator_may_return_null=1 %run %t new-nothrow 2>&1
18// RUN: %env_hwasan_opts=allocator_may_return_null=0 not %run %t new-nothrow max 2>&1 | FileCheck %s --check-prefix=CHECK-max
19// RUN: %env_hwasan_opts=allocator_may_return_null=1 %run %t new-nothrow max 2>&1
20// RUN: %run %t usable 2>&1
21
22// Tests for various edge cases related to sizes, notably the maximum size the
23// allocator can allocate. Tests that an integer overflow in the parameters of
24// calloc is caught.
25
26#include <assert.h>
27#include <malloc.h>
28#include <stdlib.h>
29#include <string.h>
30
31#include <limits>
32#include <new>
33
34#include <sanitizer/allocator_interface.h>
35#include <sanitizer/hwasan_interface.h>
36
37int main(int argc, char **argv) {
38 assert(argc <= 3);
39 bool test_size_max = argc == 3 && !strcmp(s1: argv[2], s2: "max");
40
41 static const size_t kMaxAllowedMallocSize = 1ULL << 40;
42 static const size_t kChunkHeaderSize = 16;
43
44 size_t MallocSize = test_size_max ? std::numeric_limits<size_t>::max()
45 : (kMaxAllowedMallocSize + 1);
46
47 if (!strcmp(s1: argv[1], s2: "malloc")) {
48 void *p = malloc(size: MallocSize);
49 assert(!p);
50 } else if (!strcmp(s1: argv[1], s2: "calloc")) {
51 // Trigger an overflow in calloc.
52 size_t size = std::numeric_limits<size_t>::max();
53 void *p = calloc(nmemb: (size / 0x1000) + 1, size: 0x1000);
54 assert(!p);
55 } else if (!strcmp(s1: argv[1], s2: "reallocarray")) {
56 // Trigger an overflow in reallocarray.
57 size_t size = std::numeric_limits<size_t>::max();
58 void *p = __sanitizer_reallocarray(ptr: nullptr, nmemb: (size / 0x1000) + 1, size: 0x1000);
59 assert(!p);
60 } else if (!strcmp(s1: argv[1], s2: "new")) {
61 void *p = operator new(MallocSize);
62 assert(!p);
63 } else if (!strcmp(s1: argv[1], s2: "new-nothrow")) {
64 void *p = operator new(MallocSize, std::nothrow);
65 assert(!p);
66 } else if (!strcmp(s1: argv[1], s2: "usable")) {
67 // Playing with the actual usable size of a chunk.
68 void *p = malloc(size: 1007);
69 assert(p);
70 size_t size = __sanitizer_get_allocated_size(p);
71 assert(size >= 1007);
72 memset(s: p, c: 'A', n: size);
73 p = realloc(ptr: p, size: 2014);
74 assert(p);
75 size = __sanitizer_get_allocated_size(p);
76 assert(size >= 2014);
77 memset(s: p, c: 'B', n: size);
78 free(ptr: p);
79 } else {
80 assert(0);
81 }
82
83 return 0;
84}
85
86// CHECK-max: {{ERROR: HWAddressSanitizer: requested allocation size .* exceeds maximum supported size}}
87// CHECK-oom: ERROR: HWAddressSanitizer: out of memory: allocator is trying to allocate
88// CHECK-calloc: ERROR: HWAddressSanitizer: calloc parameters overflow
89// CHECK-reallocarray: ERROR: HWAddressSanitizer: reallocarray parameters overflow
90

source code of compiler-rt/test/hwasan/TestCases/sizes.cpp