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
|
; RUN: opt < %s -asan -asan-module -asan-initialization-order -S | FileCheck %s
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"
target triple = "x86_64-unknown-linux-gnu"
@xxx = internal global i32 0, align 4 ; With dynamic initializer.
@XXX = global i32 0, align 4 ; With dynamic initializer.
@yyy = internal global i32 0, align 4 ; W/o dynamic initializer.
@YYY = global i32 0, align 4 ; W/o dynamic initializer.
; Clang will emit the following metadata identifying @xxx as dynamically
; initialized.
!0 = metadata !{i32* @xxx}
!1 = metadata !{i32* @XXX}
!llvm.asan.dynamically_initialized_globals = !{!0, !1}
define i32 @initializer() uwtable {
entry:
ret i32 42
}
define internal void @__cxx_global_var_init() section ".text.startup" {
entry:
%call = call i32 @initializer()
store i32 %call, i32* @xxx, align 4
ret void
}
define internal void @_GLOBAL__I_a() sanitize_address section ".text.startup" {
entry:
call void @__cxx_global_var_init()
ret void
}
; Clang indicated that @xxx was dynamically initailized.
; __asan_{before,after}_dynamic_init should be called from _GLOBAL__I_a
; CHECK: define internal void @_GLOBAL__I_a
; CHECK-NOT: ret
; CHECK: call void @__asan_before_dynamic_init
; CHECK: call void @__cxx_global_var_init
; CHECK: call void @__asan_after_dynamic_init
; CHECK: ret
; Check that xxx is instrumented.
define void @touch_xxx() sanitize_address {
store i32 0, i32 *@xxx, align 4
ret void
; CHECK: define void @touch_xxx
; CHECK: call void @__asan_report_store4
; CHECK: ret void
}
; Check that XXX is instrumented.
define void @touch_XXX() sanitize_address {
store i32 0, i32 *@XXX, align 4
ret void
; CHECK: define void @touch_XXX
; CHECK: call void @__asan_report_store4
; CHECK: ret void
}
; Check that yyy is NOT instrumented (as it does not have dynamic initializer).
define void @touch_yyy() sanitize_address {
store i32 0, i32 *@yyy, align 4
ret void
; CHECK: define void @touch_yyy
; CHECK-NOT: call void @__asan_report_store4
; CHECK: ret void
}
; Check that YYY is NOT instrumented (as it does not have dynamic initializer).
define void @touch_YYY() sanitize_address {
store i32 0, i32 *@YYY, align 4
ret void
; CHECK: define void @touch_YYY
; CHECK-NOT: call void @__asan_report_store4
; CHECK: ret void
}
|
