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
|
; Test handling of llvm.lifetime intrinsics.
; RUN: opt < %s -passes='asan-pipeline' -asan-use-after-scope -asan-use-after-return=never -S | FileCheck %s --check-prefixes=CHECK,CHECK-DEFAULT
; RUN: opt < %s -passes='asan-pipeline' -asan-use-after-scope -asan-use-after-return=never -asan-instrument-dynamic-allocas=0 -S | FileCheck %s --check-prefixes=CHECK,CHECK-NO-DYNAMIC
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture) nounwind
declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture) nounwind
define void @lifetime_no_size() sanitize_address {
; CHECK-LABEL: define void @lifetime_no_size()
entry:
%i = alloca i32, align 4
%i.ptr = bitcast i32* %i to i8*
; Poison memory in prologue: F1F1F1F104F3F3F3
; CHECK: store i64 -868083100587789839, i64* %{{[0-9]+}}
call void @llvm.lifetime.start.p0i8(i64 -1, i8* %i.ptr)
; Check that lifetime with no size are ignored.
; CHECK-NOT: store
; CHECK: call void @llvm.lifetime.start
store volatile i8 0, i8* %i.ptr
; CHECK: store volatile
call void @llvm.lifetime.end.p0i8(i64 -1, i8* %i.ptr)
; Check that lifetime with no size are ignored.
; CHECK-NOT: store
; CHECK: call void @llvm.lifetime.end
; Unpoison stack frame on exit.
; CHECK: store i64 0, i64* %{{[0-9]+}}
; CHECK: ret void
ret void
}
; Generic case of lifetime analysis.
define void @lifetime() sanitize_address {
; CHECK-LABEL: define void @lifetime()
; Regular variable lifetime intrinsics.
%i = alloca i32, align 4
%i.ptr = bitcast i32* %i to i8*
; Poison memory in prologue: F1F1F1F1F8F3F3F3
; CHECK: store i64 -868082052615769615, i64* %{{[0-9]+}}
; Memory is unpoisoned at llvm.lifetime.start
call void @llvm.lifetime.start.p0i8(i64 3, i8* %i.ptr)
; CHECK: store i8 4, i8* %{{[0-9]+}}
; CHECK-NEXT: llvm.lifetime.start
store volatile i8 0, i8* %i.ptr
; CHECK: store volatile
call void @llvm.lifetime.end.p0i8(i64 4, i8* %i.ptr)
; CHECK: store i8 -8, i8* %{{[0-9]+}}
; CHECK-NEXT: call void @llvm.lifetime.end
; Memory is poisoned at every call to llvm.lifetime.end
call void @llvm.lifetime.end.p0i8(i64 2, i8* %i.ptr)
; CHECK: store i8 -8, i8* %{{[0-9]+}}
; CHECK-NEXT: call void @llvm.lifetime.end
; Lifetime intrinsics for array.
%arr = alloca [10 x i32], align 16
%arr.ptr = bitcast [10 x i32]* %arr to i8*
call void @llvm.lifetime.start.p0i8(i64 40, i8* %arr.ptr)
; CHECK-DEFAULT: call void @__asan_unpoison_stack_memory(i64 %{{[^ ]+}}, i64 40)
; CHECK-NO-DYNAMIC-NOT: call void @__asan_unpoison_stack_memory(i64 %{{[^ ]+}}, i64 40)
store volatile i8 0, i8* %arr.ptr
; CHECK: store volatile
call void @llvm.lifetime.end.p0i8(i64 40, i8* %arr.ptr)
; CHECK-DEFAULT: call void @__asan_poison_stack_memory(i64 %{{[^ ]+}}, i64 40)
; CHECK-NO-DYNAMIC-NOT: call void @__asan_poison_stack_memory(i64 %{{[^ ]+}}, i64 40)
; One more lifetime start/end for the same variable %i.
call void @llvm.lifetime.start.p0i8(i64 2, i8* %i.ptr)
; CHECK: store i8 4, i8* %{{[0-9]+}}
; CHECK-NEXT: llvm.lifetime.start
store volatile i8 0, i8* %i.ptr
; CHECK: store volatile
call void @llvm.lifetime.end.p0i8(i64 4, i8* %i.ptr)
; CHECK: store i8 -8, i8* %{{[0-9]+}}
; CHECK-NEXT: llvm.lifetime.end
; Memory is unpoisoned at function exit (only once).
; CHECK: store i64 0, i64* %{{[0-9]+}}
; CHECK-NEXT: ret void
ret void
}
; Check that arguments of lifetime may come from phi nodes.
define void @phi_args(i1 %x) sanitize_address {
; CHECK-LABEL: define void @phi_args(i1 %x)
entry:
%i = alloca i64, align 4
%i.ptr = bitcast i64* %i to i8*
; Poison memory in prologue: F1F1F1F1F8F3F3F3
; CHECK: store i64 -868082052615769615, i64* %{{[0-9]+}}
call void @llvm.lifetime.start.p0i8(i64 8, i8* %i.ptr)
; CHECK: store i8 0, i8* %{{[0-9]+}}
; CHECK-NEXT: llvm.lifetime.start
store volatile i8 0, i8* %i.ptr
; CHECK: store volatile
br i1 %x, label %bb0, label %bb1
bb0:
%i.ptr2 = bitcast i64* %i to i8*
br label %bb1
bb1:
%i.phi = phi i8* [ %i.ptr, %entry ], [ %i.ptr2, %bb0 ]
call void @llvm.lifetime.end.p0i8(i64 8, i8* %i.phi)
; CHECK: store i8 -8, i8* %{{[0-9]+}}
; CHECK-NEXT: llvm.lifetime.end
ret void
; CHECK: store i64 0, i64* %{{[0-9]+}}
; CHECK-NEXT: ret void
}
; Check that arguments of lifetime may come from getelementptr nodes.
define void @getelementptr_args() sanitize_address{
; CHECK-LABEL: define void @getelementptr_args
entry:
%x = alloca [1024 x i8], align 16
%d = alloca i8*, align 8
; F1F1F1F1
; CHECK: store i32 -235802127, i32* %{{[0-9]+}}
; F3F3F3F3F3F3F3F3
; CHECK: store i64 -868082074056920077, i64* %{{[0-9]+}}
; F3F3F3F3F3F3F3F3
; CHECK: store i64 -868082074056920077, i64* %{{[0-9]+}}
%0 = getelementptr inbounds [1024 x i8], [1024 x i8]* %x, i64 0, i64 0
call void @llvm.lifetime.start.p0i8(i64 1024, i8* %0)
; CHECK: call void @__asan_set_shadow_00(i64 %{{[0-9]+}}, i64 128)
; CHECK-NEXT: call void @llvm.lifetime.start
store i8* %0, i8** %d, align 8
; CHECK: store i8
call void @llvm.lifetime.end.p0i8(i64 1024, i8* %0)
; CHECK: call void @__asan_set_shadow_f8(i64 %{{[0-9]+}}, i64 128)
; CHECK-NEXT: call void @llvm.lifetime.end
ret void
; CHECK: call void @__asan_set_shadow_00(i64 %{{[0-9]+}}, i64 148)
; CHECK-NEXT: ret void
}
define void @zero_sized(i64 %a) #0 {
; CHECK-LABEL: define void @zero_sized(i64 %a)
entry:
%a.addr = alloca i64, align 8
%b = alloca [0 x i8], align 1
store i64 %a, i64* %a.addr, align 8
%0 = bitcast [0 x i8]* %b to i8*
call void @llvm.lifetime.start.p0i8(i64 0, i8* %0) #2
; CHECK: %{{[0-9]+}} = bitcast
; CHECK-NEXT: call void @llvm.lifetime.start
%1 = bitcast [0 x i8]* %b to i8*
call void @llvm.lifetime.end.p0i8(i64 0, i8* %1) #2
; CHECK-NEXT: %{{[0-9]+}} = bitcast
; CHECK-NEXT: call void @llvm.lifetime.end
ret void
; CHECK-NEXT: ret void
}
|
