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
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
| // RUN: %clang_cc1 -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s --check-prefix=CHECK
// RUN: %clang_cc1 -fsanitize=implicit-unsigned-integer-truncation,implicit-signed-integer-truncation -fno-sanitize-recover=implicit-unsigned-integer-truncation,implicit-signed-integer-truncation -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s -implicit-check-not="call void @__ubsan_handle_implicit_conversion" --check-prefixes=CHECK,CHECK-SANITIZE,CHECK-SANITIZE-ANYRECOVER,CHECK-SANITIZE-NORECOVER,CHECK-SANITIZE-UNREACHABLE
// RUN: %clang_cc1 -fsanitize=implicit-unsigned-integer-truncation,implicit-signed-integer-truncation -fsanitize-recover=implicit-unsigned-integer-truncation,implicit-signed-integer-truncation -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s -implicit-check-not="call void @__ubsan_handle_implicit_conversion" --check-prefixes=CHECK,CHECK-SANITIZE,CHECK-SANITIZE-ANYRECOVER,CHECK-SANITIZE-RECOVER
// RUN: %clang_cc1 -fsanitize=implicit-unsigned-integer-truncation,implicit-signed-integer-truncation -fsanitize-trap=implicit-unsigned-integer-truncation,implicit-signed-integer-truncation -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s -implicit-check-not="call void @__ubsan_handle_implicit_conversion" --check-prefixes=CHECK,CHECK-SANITIZE,CHECK-SANITIZE-TRAP,CHECK-SANITIZE-UNREACHABLE
// CHECK-SANITIZE-ANYRECOVER: @[[UNSIGNED_INT:.*]] = {{.*}} c"'unsigned int'\00" }
// CHECK-SANITIZE-ANYRECOVER: @[[UNSIGNED_CHAR:.*]] = {{.*}} c"'unsigned char'\00" }
// CHECK-SANITIZE-ANYRECOVER: @[[LINE_100_UNSIGNED_TRUNCATION:.*]] = {{.*}}, i32 100, i32 10 }, {{.*}}* @[[UNSIGNED_INT]], {{.*}}* @[[UNSIGNED_CHAR]], i8 1 }
// CHECK-SANITIZE-ANYRECOVER: @[[SIGNED_INT:.*]] = {{.*}} c"'int'\00" }
// CHECK-SANITIZE-ANYRECOVER: @[[LINE_200_SIGNED_TRUNCATION:.*]] = {{.*}}, i32 200, i32 10 }, {{.*}}* @[[SIGNED_INT]], {{.*}}* @[[UNSIGNED_CHAR]], i8 2 }
// CHECK-SANITIZE-ANYRECOVER: @[[SIGNED_CHAR:.*]] = {{.*}} c"'signed char'\00" }
// CHECK-SANITIZE-ANYRECOVER: @[[LINE_300_SIGNED_TRUNCATION:.*]] = {{.*}}, i32 300, i32 10 }, {{.*}}* @[[UNSIGNED_INT]], {{.*}}* @[[SIGNED_CHAR]], i8 2 }
// CHECK-SANITIZE-ANYRECOVER: @[[LINE_400_SIGNED_TRUNCATION:.*]] = {{.*}}, i32 400, i32 10 }, {{.*}}* @[[SIGNED_INT]], {{.*}}* @[[SIGNED_CHAR]], i8 2 }
// CHECK-SANITIZE-ANYRECOVER: @[[UINT32:.*]] = {{.*}} c"'uint32_t' (aka 'unsigned int')\00" }
// CHECK-SANITIZE-ANYRECOVER: @[[UINT8:.*]] = {{.*}} c"'uint8_t' (aka 'unsigned char')\00" }
// CHECK-SANITIZE-ANYRECOVER: @[[LINE_500_UNSIGNED_TRUNCATION:.*]] = {{.*}}, i32 500, i32 10 }, {{.*}}* @[[UINT32]], {{.*}}* @[[UINT8]], i8 1 }
// ========================================================================== //
// The expected true-positives. These are implicit conversions, and they truncate.
// ========================================================================== //
// CHECK-LABEL: @unsigned_int_to_unsigned_char
unsigned char unsigned_int_to_unsigned_char(unsigned int src) {
// CHECK: %[[DST:.*]] = trunc i32 %[[SRC:.*]] to i8
// CHECK-SANITIZE-NEXT: %[[ANYEXT:.*]] = zext i8 %[[DST]] to i32, !nosanitize
// CHECK-SANITIZE-NEXT: %[[TRUNCHECK:.*]] = icmp eq i32 %[[ANYEXT]], %[[SRC]], !nosanitize
// CHECK-SANITIZE-NEXT: br i1 %[[TRUNCHECK]], label %[[CONT:.*]], label %[[HANDLER_IMPLICIT_CONVERSION:[^,]+]],{{.*}} !nosanitize
// CHECK-SANITIZE: [[HANDLER_IMPLICIT_CONVERSION]]:
// CHECK-SANITIZE-ANYRECOVER-NEXT: %[[EXTSRC:.*]] = zext i32 %[[SRC]] to i64, !nosanitize
// CHECK-SANITIZE-ANYRECOVER-NEXT: %[[EXTDST:.*]] = zext i8 %[[DST]] to i64, !nosanitize
// CHECK-SANITIZE-NORECOVER-NEXT: call void @__ubsan_handle_implicit_conversion_abort(i8* bitcast ({ {{{.*}}}, {{{.*}}}*, {{{.*}}}*, i8 }* @[[LINE_100_UNSIGNED_TRUNCATION]] to i8*), i64 %[[EXTSRC]], i64 %[[EXTDST]]){{.*}}, !nosanitize
// CHECK-SANITIZE-RECOVER-NEXT: call void @__ubsan_handle_implicit_conversion(i8* bitcast ({ {{{.*}}}, {{{.*}}}*, {{{.*}}}*, i8 }* @[[LINE_100_UNSIGNED_TRUNCATION]] to i8*), i64 %[[EXTSRC]], i64 %[[EXTDST]]){{.*}}, !nosanitize
// CHECK-SANITIZE-TRAP-NEXT: call void @llvm.trap(){{.*}}, !nosanitize
// CHECK-SANITIZE-UNREACHABLE-NEXT: unreachable, !nosanitize
// CHECK-SANITIZE: [[CONT]]:
// CHECK-NEXT: ret i8 %[[DST]]
// CHECK-NEXT: }
#line 100
return src;
}
// CHECK-LABEL: @signed_int_to_unsigned_char
unsigned char signed_int_to_unsigned_char(signed int src) {
// CHECK: %[[DST:.*]] = trunc i32 %[[SRC:.*]] to i8
// CHECK-SANITIZE-NEXT: %[[ANYEXT:.*]] = zext i8 %[[DST]] to i32, !nosanitize
// CHECK-SANITIZE-NEXT: %[[TRUNCHECK:.*]] = icmp eq i32 %[[ANYEXT]], %[[SRC]], !nosanitize
// CHECK-SANITIZE-NEXT: br i1 %[[TRUNCHECK]], label %[[CONT:.*]], label %[[HANDLER_IMPLICIT_CONVERSION:[^,]+]],{{.*}} !nosanitize
// CHECK-SANITIZE: [[HANDLER_IMPLICIT_CONVERSION]]:
// CHECK-SANITIZE-ANYRECOVER-NEXT: %[[EXTSRC:.*]] = zext i32 %[[SRC]] to i64, !nosanitize
// CHECK-SANITIZE-ANYRECOVER-NEXT: %[[EXTDST:.*]] = zext i8 %[[DST]] to i64, !nosanitize
// CHECK-SANITIZE-NORECOVER-NEXT: call void @__ubsan_handle_implicit_conversion_abort(i8* bitcast ({ {{{.*}}}, {{{.*}}}*, {{{.*}}}*, i8 }* @[[LINE_200_SIGNED_TRUNCATION]] to i8*), i64 %[[EXTSRC]], i64 %[[EXTDST]]){{.*}}, !nosanitize
// CHECK-SANITIZE-RECOVER-NEXT: call void @__ubsan_handle_implicit_conversion(i8* bitcast ({ {{{.*}}}, {{{.*}}}*, {{{.*}}}*, i8 }* @[[LINE_200_SIGNED_TRUNCATION]] to i8*), i64 %[[EXTSRC]], i64 %[[EXTDST]]){{.*}}, !nosanitize
// CHECK-SANITIZE-TRAP-NEXT: call void @llvm.trap(){{.*}}, !nosanitize
// CHECK-SANITIZE-UNREACHABLE-NEXT: unreachable, !nosanitize
// CHECK-SANITIZE: [[CONT]]:
// CHECK-NEXT: ret i8 %[[DST]]
// CHECK-NEXT: }
#line 200
return src;
}
// CHECK-LABEL: @unsigned_int_to_signed_char
signed char unsigned_int_to_signed_char(unsigned int src) {
// CHECK: %[[DST:.*]] = trunc i32 %[[SRC:.*]] to i8
// CHECK-SANITIZE-NEXT: %[[ANYEXT:.*]] = sext i8 %[[DST]] to i32, !nosanitize
// CHECK-SANITIZE-NEXT: %[[TRUNCHECK:.*]] = icmp eq i32 %[[ANYEXT]], %[[SRC]], !nosanitize
// CHECK-SANITIZE-NEXT: br i1 %[[TRUNCHECK]], label %[[CONT:.*]], label %[[HANDLER_IMPLICIT_CONVERSION:[^,]+]],{{.*}} !nosanitize
// CHECK-SANITIZE: [[HANDLER_IMPLICIT_CONVERSION]]:
// CHECK-SANITIZE-ANYRECOVER-NEXT: %[[EXTSRC:.*]] = zext i32 %[[SRC]] to i64, !nosanitize
// CHECK-SANITIZE-ANYRECOVER-NEXT: %[[EXTDST:.*]] = zext i8 %[[DST]] to i64, !nosanitize
// CHECK-SANITIZE-NORECOVER-NEXT: call void @__ubsan_handle_implicit_conversion_abort(i8* bitcast ({ {{{.*}}}, {{{.*}}}*, {{{.*}}}*, i8 }* @[[LINE_300_SIGNED_TRUNCATION]] to i8*), i64 %[[EXTSRC]], i64 %[[EXTDST]]){{.*}}, !nosanitize
// CHECK-SANITIZE-RECOVER-NEXT: call void @__ubsan_handle_implicit_conversion(i8* bitcast ({ {{{.*}}}, {{{.*}}}*, {{{.*}}}*, i8 }* @[[LINE_300_SIGNED_TRUNCATION]] to i8*), i64 %[[EXTSRC]], i64 %[[EXTDST]]){{.*}}, !nosanitize
// CHECK-SANITIZE-TRAP-NEXT: call void @llvm.trap(){{.*}}, !nosanitize
// CHECK-SANITIZE-UNREACHABLE-NEXT: unreachable, !nosanitize
// CHECK-SANITIZE: [[CONT]]:
// CHECK-NEXT: ret i8 %[[DST]]
// CHECK-NEXT: }
#line 300
return src;
}
// CHECK-LABEL: @signed_int_to_signed_char
signed char signed_int_to_signed_char(signed int src) {
// CHECK: %[[DST:.*]] = trunc i32 %[[SRC:.*]] to i8
// CHECK-SANITIZE-NEXT: %[[ANYEXT:.*]] = sext i8 %[[DST]] to i32, !nosanitize
// CHECK-SANITIZE-NEXT: %[[TRUNCHECK:.*]] = icmp eq i32 %[[ANYEXT]], %[[SRC]], !nosanitize
// CHECK-SANITIZE-NEXT: br i1 %[[TRUNCHECK]], label %[[CONT:.*]], label %[[HANDLER_IMPLICIT_CONVERSION:[^,]+]],{{.*}} !nosanitize
// CHECK-SANITIZE: [[HANDLER_IMPLICIT_CONVERSION]]:
// CHECK-SANITIZE-ANYRECOVER-NEXT: %[[EXTSRC:.*]] = zext i32 %[[SRC]] to i64, !nosanitize
// CHECK-SANITIZE-ANYRECOVER-NEXT: %[[EXTDST:.*]] = zext i8 %[[DST]] to i64, !nosanitize
// CHECK-SANITIZE-NORECOVER-NEXT: call void @__ubsan_handle_implicit_conversion_abort(i8* bitcast ({ {{{.*}}}, {{{.*}}}*, {{{.*}}}*, i8 }* @[[LINE_400_SIGNED_TRUNCATION]] to i8*), i64 %[[EXTSRC]], i64 %[[EXTDST]]){{.*}}, !nosanitize
// CHECK-SANITIZE-RECOVER-NEXT: call void @__ubsan_handle_implicit_conversion(i8* bitcast ({ {{{.*}}}, {{{.*}}}*, {{{.*}}}*, i8 }* @[[LINE_400_SIGNED_TRUNCATION]] to i8*), i64 %[[EXTSRC]], i64 %[[EXTDST]]){{.*}}, !nosanitize
// CHECK-SANITIZE-TRAP-NEXT: call void @llvm.trap(){{.*}}, !nosanitize
// CHECK-SANITIZE-UNREACHABLE-NEXT: unreachable, !nosanitize
// CHECK-SANITIZE: [[CONT]]:
// CHECK-NEXT: ret i8 %[[DST]]
// CHECK-NEXT: }
#line 400
return src;
}
// ========================================================================== //
// Check canonical type stuff
// ========================================================================== //
typedef unsigned int uint32_t;
typedef unsigned char uint8_t;
// CHECK-LABEL: @uint32_to_uint8
uint8_t uint32_to_uint8(uint32_t src) {
// CHECK: %[[DST:.*]] = trunc i32 %[[SRC:.*]] to i8
// CHECK-SANITIZE-NEXT: %[[ANYEXT:.*]] = zext i8 %[[DST]] to i32, !nosanitize
// CHECK-SANITIZE-NEXT: %[[TRUNCHECK:.*]] = icmp eq i32 %[[ANYEXT]], %[[SRC]], !nosanitize
// CHECK-SANITIZE-NEXT: br i1 %[[TRUNCHECK]], label %[[CONT:.*]], label %[[HANDLER_IMPLICIT_CONVERSION:[^,]+]],{{.*}} !nosanitize
// CHECK-SANITIZE: [[HANDLER_IMPLICIT_CONVERSION]]:
// CHECK-SANITIZE-ANYRECOVER-NEXT: %[[EXTSRC:.*]] = zext i32 %[[SRC]] to i64, !nosanitize
// CHECK-SANITIZE-ANYRECOVER-NEXT: %[[EXTDST:.*]] = zext i8 %[[DST]] to i64, !nosanitize
// CHECK-SANITIZE-NORECOVER-NEXT: call void @__ubsan_handle_implicit_conversion_abort(i8* bitcast ({ {{{.*}}}, {{{.*}}}*, {{{.*}}}*, i8 }* @[[LINE_500_UNSIGNED_TRUNCATION]] to i8*), i64 %[[EXTSRC]], i64 %[[EXTDST]]){{.*}}, !nosanitize
// CHECK-SANITIZE-RECOVER-NEXT: call void @__ubsan_handle_implicit_conversion(i8* bitcast ({ {{{.*}}}, {{{.*}}}*, {{{.*}}}*, i8 }* @[[LINE_500_UNSIGNED_TRUNCATION]] to i8*), i64 %[[EXTSRC]], i64 %[[EXTDST]]){{.*}}, !nosanitize
// CHECK-SANITIZE-TRAP-NEXT: call void @llvm.trap(){{.*}}, !nosanitize
// CHECK-SANITIZE-UNREACHABLE-NEXT: unreachable, !nosanitize
// CHECK-SANITIZE: [[CONT]]:
// CHECK-NEXT: ret i8 %[[DST]]
// CHECK-NEXT: }
#line 500
return src;
}
// ========================================================================== //
// Check that explicit conversion does not interfere with implicit conversion
// ========================================================================== //
// These contain one implicit truncating conversion, and one explicit truncating conversion.
// We want to make sure that we still diagnose the implicit conversion.
// Implicit truncation after explicit truncation.
// CHECK-LABEL: @explicit_conversion_interference0
unsigned char explicit_conversion_interference0(unsigned int c) {
// CHECK-SANITIZE: %[[ANYEXT:.*]] = zext i8 %[[DST:.*]] to i16, !nosanitize
// CHECK-SANITIZE: call
return (unsigned short)c;
}
// Implicit truncation before explicit truncation.
// CHECK-LABEL: @explicit_conversion_interference1
unsigned char explicit_conversion_interference1(unsigned int c) {
// CHECK-SANITIZE: %[[ANYEXT:.*]] = zext i16 %[[DST:.*]] to i32, !nosanitize
// CHECK-SANITIZE: call
unsigned short b;
return (unsigned char)(b = c);
}
// ========================================================================== //
// The expected true-negatives.
// ========================================================================== //
// Sanitization is explicitly disabled.
// ========================================================================== //
// CHECK-LABEL: @blacklist_0
__attribute__((no_sanitize("undefined"))) unsigned char blacklist_0(unsigned int src) {
// We are not in "undefined" group, so that doesn't work.
// CHECK-SANITIZE: call
return src;
}
// CHECK-LABEL: @blacklist_1
__attribute__((no_sanitize("integer"))) unsigned char blacklist_1(unsigned int src) {
return src;
}
// CHECK-LABEL: @blacklist_2
__attribute__((no_sanitize("implicit-conversion"))) unsigned char blacklist_2(unsigned int src) {
return src;
}
// CHECK-LABEL: @blacklist_3
__attribute__((no_sanitize("implicit-integer-truncation"))) unsigned char blacklist_3(unsigned int src) {
return src;
}
// Explicit truncating conversions.
// ========================================================================== //
// CHECK-LABEL: @explicit_unsigned_int_to_unsigned_char
unsigned char explicit_unsigned_int_to_unsigned_char(unsigned int src) {
return (unsigned char)src;
}
// CHECK-LABEL: @explicit_signed_int_to_unsigned_char
unsigned char explicit_signed_int_to_unsigned_char(signed int src) {
return (unsigned char)src;
}
// CHECK-LABEL: @explicit_unsigned_int_to_signed_char
signed char explicit_unsigned_int_to_signed_char(unsigned int src) {
return (signed char)src;
}
// CHECK-LABEL: @explicit_signed_int_to_signed_char
signed char explicit_signed_int_to_signed_char(signed int src) {
return (signed char)src;
}
// Explicit NOP conversions.
// ========================================================================== //
// CHECK-LABEL: @explicit_unsigned_int_to_unsigned_int
unsigned int explicit_unsigned_int_to_unsigned_int(unsigned int src) {
return (unsigned int)src;
}
// CHECK-LABEL: @explicit_signed_int_to_signed_int
signed int explicit_signed_int_to_signed_int(signed int src) {
return (signed int)src;
}
// CHECK-LABEL: @explicit_unsigned_char_to_signed_char
unsigned char explicit_unsigned_char_to_signed_char(unsigned char src) {
return (unsigned char)src;
}
// CHECK-LABEL: @explicit_signed_char_to_signed_char
signed char explicit_signed_char_to_signed_char(signed char src) {
return (signed char)src;
}
// upcasts.
// ========================================================================== //
// CHECK-LABEL: @unsigned_char_to_unsigned_int
unsigned int unsigned_char_to_unsigned_int(unsigned char src) {
return src;
}
// CHECK-LABEL: @signed_char_to_unsigned_int
unsigned int signed_char_to_unsigned_int(signed char src) {
return src;
}
// CHECK-LABEL: @unsigned_char_to_signed_int
signed int unsigned_char_to_signed_int(unsigned char src) {
return src;
}
// CHECK-LABEL: @signed_char_to_signed_int
signed int signed_char_to_signed_int(signed char src) {
return src;
}
// Explicit upcasts.
// ========================================================================== //
// CHECK-LABEL: @explicit_unsigned_char_to_unsigned_int
unsigned int explicit_unsigned_char_to_unsigned_int(unsigned char src) {
return (unsigned int)src;
}
// CHECK-LABEL: @explicit_signed_char_to_unsigned_int
unsigned int explicit_signed_char_to_unsigned_int(signed char src) {
return (unsigned int)src;
}
// CHECK-LABEL: @explicit_unsigned_char_to_signed_int
signed int explicit_unsigned_char_to_signed_int(unsigned char src) {
return (signed int)src;
}
// CHECK-LABEL: @explicit_signed_char_to_signed_int
signed int explicit_signed_char_to_signed_int(signed char src) {
return (signed int)src;
}
// conversions to to boolean type are not counted as truncation.
// ========================================================================== //
// CHECK-LABEL: @unsigned_int_to_bool
_Bool unsigned_int_to_bool(unsigned int src) {
return src;
}
// CHECK-LABEL: @signed_int_to_bool
_Bool signed_int_to_bool(signed int src) {
return src;
}
// CHECK-LABEL: @explicit_unsigned_int_to_bool
_Bool explicit_unsigned_int_to_bool(unsigned int src) {
return (_Bool)src;
}
// CHECK-LABEL: @explicit_signed_int_to_bool
_Bool explicit_signed_int_to_bool(signed int src) {
return (_Bool)src;
}
// Explicit truncating conversions from pointer to a much-smaller integer.
// Can not have an implicit conversion from pointer to an integer.
// Can not have an implicit conversion between two enums.
// ========================================================================== //
// CHECK-LABEL: @explicit_voidptr_to_unsigned_char
unsigned char explicit_voidptr_to_unsigned_char(void *src) {
return (unsigned char)src;
}
// CHECK-LABEL: @explicit_voidptr_to_signed_char
signed char explicit_voidptr_to_signed_char(void *src) {
return (signed char)src;
}
// Implicit truncating conversions from floating-point may result in precision loss.
// ========================================================================== //
// CHECK-LABEL: @float_to_unsigned_int
unsigned int float_to_unsigned_int(float src) {
return src;
}
// CHECK-LABEL: @float_to_signed_int
signed int float_to_signed_int(float src) {
return src;
}
// CHECK-LABEL: @double_to_unsigned_int
unsigned int double_to_unsigned_int(double src) {
return src;
}
// CHECK-LABEL: @double_to_signed_int
signed int double_to_signed_int(double src) {
return src;
}
// Implicit truncating conversions between fp may result in precision loss.
// ========================================================================== //
// CHECK-LABEL: @double_to_float
float double_to_float(double src) {
return src;
}
|