1 // RUN: %clangxx_dfsan %s -mllvm -dfsan-track-select-control-flow=false -mllvm -dfsan-combine-pointer-labels-on-load=false -O0 -DO0 -o %t && %run %t
2 // RUN: %clangxx_dfsan %s -mllvm -dfsan-track-select-control-flow=false -mllvm -dfsan-combine-pointer-labels-on-load=false -O1 -o %t && %run %t
3
4 #include <algorithm>
5 #include <assert.h>
6 #include <sanitizer/dfsan_interface.h>
7 #include <utility>
8
9 __attribute__((noinline))
10 std::pair<int *, int>
make_pair(int * p,int i)11 make_pair(int *p, int i) { return {p, i}; }
12
13 __attribute__((noinline))
14 std::pair<int *, int>
copy_pair1(const std::pair<int *,int> & pair)15 copy_pair1(const std::pair<int *, int> &pair) {
16 return pair;
17 }
18
19 __attribute__((noinline))
20 std::pair<int *, int>
copy_pair2(std::pair<int *,int> * pair)21 copy_pair2(std::pair<int *, int> *pair) {
22 return *pair;
23 }
24
25 __attribute__((noinline))
26 std::pair<int *, int>
copy_pair3(std::pair<int *,int> && pair)27 copy_pair3(std::pair<int *, int> &&pair) {
28 return std::move(pair);
29 }
30
31 __attribute__((noinline))
32 std::pair<const char *, uint32_t>
return_ptr_and_i32(const char * p,uint32_t res)33 return_ptr_and_i32(const char *p, uint32_t res) {
34 for (uint32_t i = 2; i < 5; i++) {
35 uint32_t byte = static_cast<uint8_t>(p[i]);
36 res += (byte - 1) << (7 * i);
37 if (byte < 128) {
38 return {p + i + 1, res};
39 }
40 }
41 return {nullptr, 0};
42 }
43
44 __attribute__((noinline))
45 std::pair<const char *, uint64_t>
return_ptr_and_i64(const char * p,uint32_t res32)46 return_ptr_and_i64(const char *p, uint32_t res32) {
47 uint64_t res = res32;
48 for (uint32_t i = 2; i < 10; i++) {
49 uint64_t byte = static_cast<uint8_t>(p[i]);
50 res += (byte - 1) << (7 * i);
51 if (byte < 128) {
52 return {p + i + 1, res};
53 }
54 }
55 return {nullptr, 0};
56 }
57
test_simple_constructors()58 void test_simple_constructors() {
59 int i = 1;
60 int *ptr = NULL;
61 dfsan_set_label(8, &i, sizeof(i));
62 dfsan_set_label(2, &ptr, sizeof(ptr));
63
64 std::pair<int *, int> pair1 = make_pair(ptr, i);
65 int i1 = pair1.second;
66 int *ptr1 = pair1.first;
67
68 #ifdef O0
69 assert(dfsan_read_label(&i1, sizeof(i1)) == 10);
70 assert(dfsan_read_label(&ptr1, sizeof(ptr1)) == 10);
71 #else
72 assert(dfsan_read_label(&i1, sizeof(i1)) == 8);
73 assert(dfsan_read_label(&ptr1, sizeof(ptr1)) == 2);
74 #endif
75
76 std::pair<int *, int> pair2 = copy_pair1(pair1);
77 int i2 = pair2.second;
78 int *ptr2 = pair2.first;
79
80 #ifdef O0
81 assert(dfsan_read_label(&i2, sizeof(i2)) == 10);
82 assert(dfsan_read_label(&ptr2, sizeof(ptr2)) == 10);
83 #else
84 assert(dfsan_read_label(&i2, sizeof(i2)) == 8);
85 assert(dfsan_read_label(&ptr2, sizeof(ptr2)) == 2);
86 #endif
87
88 std::pair<int *, int> pair3 = copy_pair2(&pair1);
89 int i3 = pair3.second;
90 int *ptr3 = pair3.first;
91
92 #ifdef O0
93 assert(dfsan_read_label(&i3, sizeof(i3)) == 10);
94 assert(dfsan_read_label(&ptr3, sizeof(ptr3)) == 10);
95 #else
96 assert(dfsan_read_label(&i3, sizeof(i3)) == 8);
97 assert(dfsan_read_label(&ptr3, sizeof(ptr3)) == 2);
98 #endif
99
100 std::pair<int *, int> pair4 = copy_pair3(std::move(pair1));
101 int i4 = pair4.second;
102 int *ptr4 = pair4.first;
103
104 #ifdef O0
105 assert(dfsan_read_label(&i4, sizeof(i4)) == 10);
106 assert(dfsan_read_label(&ptr4, sizeof(ptr4)) == 10);
107 #else
108 assert(dfsan_read_label(&i4, sizeof(i4)) == 8);
109 assert(dfsan_read_label(&ptr4, sizeof(ptr4)) == 2);
110 #endif
111 }
112
test_branches()113 void test_branches() {
114 uint32_t res = 4;
115 dfsan_set_label(8, &res, sizeof(res));
116
117 char p[100];
118 const char *q = p;
119 dfsan_set_label(2, &q, sizeof(q));
120
121 {
122 std::fill_n(p, 100, static_cast<char>(128));
123
124 {
125 std::pair<const char *, uint32_t> r = return_ptr_and_i32(q, res);
126 assert(dfsan_read_label(&r.first, sizeof(r.first)) == 0);
127 assert(dfsan_read_label(&r.second, sizeof(r.second)) == 0);
128 }
129
130 {
131 std::pair<const char *, uint64_t> r = return_ptr_and_i64(q, res);
132 assert(dfsan_read_label(&r.first, sizeof(r.first)) == 0);
133 assert(dfsan_read_label(&r.second, sizeof(r.second)) == 0);
134 }
135 }
136
137 {
138 std::fill_n(p, 100, 0);
139
140 {
141 std::pair<const char *, uint32_t> r = return_ptr_and_i32(q, res);
142 #ifdef O0
143 assert(dfsan_read_label(&r.first, sizeof(r.first)) == 10);
144 assert(dfsan_read_label(&r.second, sizeof(r.second)) == 10);
145 #else
146 assert(dfsan_read_label(&r.first, sizeof(r.first)) == 2);
147 assert(dfsan_read_label(&r.second, sizeof(r.second)) == 8);
148 #endif
149 }
150
151 {
152 std::pair<const char *, uint64_t> r = return_ptr_and_i64(q, res);
153 #ifdef O0
154 assert(dfsan_read_label(&r.first, sizeof(r.first)) == 10);
155 assert(dfsan_read_label(&r.second, sizeof(r.second)) == 10);
156 #else
157 assert(dfsan_read_label(&r.first, sizeof(r.first)) == 2);
158 assert(dfsan_read_label(&r.second, sizeof(r.second)) == 8);
159 #endif
160 }
161 }
162 }
163
main(void)164 int main(void) {
165 test_simple_constructors();
166 test_branches();
167
168 return 0;
169 }
170