1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
|
// RUN: %clang_dfsan -mllvm -dfsan-combine-pointer-labels-on-load=false %s -o %t && %run %t
// RUN: %clang_dfsan -DORIGIN_TRACKING -mllvm -dfsan-track-origins=1 -mllvm -dfsan-combine-pointer-labels-on-load=false %s -o %t && %run %t
//
// Tests custom implementations of various glibc functions.
#include <sanitizer/dfsan_interface.h>
#include <assert.h>
#include <malloc.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mman.h>
#define ASSERT_ZERO_LABEL(data) \
assert(0 == dfsan_get_label((long) (data)))
#define ASSERT_READ_ZERO_LABEL(ptr, size) \
assert(0 == dfsan_read_label(ptr, size))
const int kAlignment = 8;
const int kSize = 16;
void test_aligned_alloc() {
char *p = (char *) aligned_alloc(kAlignment, kSize);
ASSERT_ZERO_LABEL(p);
ASSERT_READ_ZERO_LABEL(p, kSize);
free(p);
}
void test_calloc() {
char *p = (char *) calloc(kSize, 1);
ASSERT_ZERO_LABEL(p);
ASSERT_READ_ZERO_LABEL(p, kSize);
free(p);
}
void test_cfree() {
// The current glibc does not support cfree.
}
void test_free() {
char *p = (char *) malloc(kSize);
dfsan_set_label(1, p, kSize);
free(p);
ASSERT_READ_ZERO_LABEL(p, kSize);
}
void test_mallinfo() {
// The mallinfo interceptor takes an argument instead of returning a struct.
// This doesn't work on AArch64 which uses different registers for the two
// function types.
#if defined(__GLIBC__) && !defined(__aarch64__)
struct mallinfo mi = mallinfo();
for (int i = 0; i < sizeof(struct mallinfo); ++i) {
char c = ((char *)(&mi))[i];
assert(!c);
ASSERT_ZERO_LABEL(c);
}
#endif
}
void test_malloc() {
char *p = (char *) malloc(kSize);
ASSERT_ZERO_LABEL(p);
ASSERT_READ_ZERO_LABEL(p, kSize);
free(p);
}
void test_malloc_stats() {
// Only ensures it does not crash. Our interceptor of malloc_stats is empty.
malloc_stats();
}
void test_malloc_usable_size() {
char *p = (char *) malloc(kSize);
size_t s = malloc_usable_size(p);
assert(s == kSize);
ASSERT_ZERO_LABEL(s);
free(p);
}
void test_mallopt() {
int r = mallopt(0, 0);
assert(!r);
ASSERT_ZERO_LABEL(r);
}
void test_memalign() {
char *p = (char *) memalign(kAlignment, kSize);
ASSERT_ZERO_LABEL(p);
ASSERT_READ_ZERO_LABEL(p, kSize);
free(p);
}
void test_mmap() {
char *p = mmap(NULL, kSize, PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
ASSERT_READ_ZERO_LABEL(p, kSize);
char val = 0xff;
dfsan_set_label(1, &val, sizeof(val));
memset(p, val, kSize);
p = mmap(p, kSize, PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
ASSERT_READ_ZERO_LABEL(p, kSize);
munmap(p, kSize);
}
void test_mmap64() {
// The current glibc does not support mmap64.
}
void test_unmmap() {
char *p = mmap(NULL, kSize, PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
char val = 0xff;
dfsan_set_label(1, &val, sizeof(val));
memset(p, val, kSize);
munmap(p, kSize);
ASSERT_READ_ZERO_LABEL(p, kSize);
}
void test_posix_memalign() {
char *p;
dfsan_set_label(1, &p, sizeof(p));
int r = posix_memalign((void **)&p, kAlignment, kSize);
assert(!r);
ASSERT_ZERO_LABEL(p);
ASSERT_READ_ZERO_LABEL(p, kSize);
free(p);
}
void test_pvalloc() {
char *p = (char *) pvalloc(kSize);
ASSERT_ZERO_LABEL(p);
ASSERT_READ_ZERO_LABEL(p, kSize);
free(p);
}
void test_realloc() {
char *p = (char *) malloc(kSize);
char *q = (char *) realloc(p, kSize * 2);
ASSERT_ZERO_LABEL(q);
ASSERT_READ_ZERO_LABEL(q, kSize * 2);
char *x = (char *) realloc(q, kSize);
ASSERT_ZERO_LABEL(x);
ASSERT_READ_ZERO_LABEL(x, kSize);
free(x);
}
void test_reallocarray() {
// The current glibc does not support reallocarray.
}
void test_valloc() {
char *p = (char *) valloc(kSize);
ASSERT_ZERO_LABEL(p);
ASSERT_READ_ZERO_LABEL(p, kSize);
free(p);
}
void test___libc_memalign() {
// The current glibc does not support __libc_memalign.
}
void test___tls_get_addr() {
// The current glibc does not support __tls_get_addr.
}
int main(void) {
// With any luck this sequence of calls will cause allocators to return the
// same pointer. This is probably the best we can do to test these functions.
test_aligned_alloc();
test_calloc();
test_cfree();
test_free();
test_mallinfo();
test_malloc();
test_malloc_stats();
test_malloc_usable_size();
test_mallopt();
test_memalign();
test_mmap();
test_mmap64();
test_unmmap();
test_posix_memalign();
test_pvalloc();
test_realloc();
test_reallocarray();
test_valloc();
test___libc_memalign();
test___tls_get_addr();
}
|
