1; RUN: opt < %s -asan -asan-module -S | FileCheck %s
2target 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"
3target triple = "x86_64-unknown-linux-gnu"
4@xxx = internal global i32 0, align 4  ; With dynamic initializer.
5@XXX = global i32 0, align 4           ; With dynamic initializer.
6@yyy = internal global i32 0, align 4  ; W/o dynamic initializer.
7@YYY = global i32 0, align 4           ; W/o dynamic initializer.
8; Clang will emit the following metadata identifying @xxx as dynamically
9; initialized.
10!0 = metadata !{i32* @xxx}
11!1 = metadata !{i32* @XXX}
12!llvm.asan.dynamically_initialized_globals = !{!0, !1}
13
14define i32 @initializer() uwtable {
15entry:
16  ret i32 42
17}
18
19define internal void @__cxx_global_var_init() section ".text.startup" {
20entry:
21  %call = call i32 @initializer()
22  store i32 %call, i32* @xxx, align 4
23  ret void
24}
25
26define internal void @_GLOBAL__I_a() sanitize_address section ".text.startup" {
27entry:
28  call void @__cxx_global_var_init()
29  ret void
30}
31
32; Clang indicated that @xxx was dynamically initailized.
33; __asan_{before,after}_dynamic_init should be called from _GLOBAL__I_a
34
35; CHECK: define internal void @_GLOBAL__I_a
36; CHECK-NOT: ret
37; CHECK: call void @__asan_before_dynamic_init
38; CHECK: call void @__cxx_global_var_init
39; CHECK: call void @__asan_after_dynamic_init
40; CHECK: ret
41
42; Check that xxx is instrumented.
43define void @touch_xxx() sanitize_address {
44  store i32 0, i32 *@xxx, align 4
45  ret void
46; CHECK: define void @touch_xxx
47; CHECK: call void @__asan_report_store4
48; CHECK: ret void
49}
50
51; Check that XXX is instrumented.
52define void @touch_XXX() sanitize_address {
53  store i32 0, i32 *@XXX, align 4
54  ret void
55; CHECK: define void @touch_XXX
56; CHECK: call void @__asan_report_store4
57; CHECK: ret void
58}
59
60
61; Check that yyy is NOT instrumented (as it does not have dynamic initializer).
62define void @touch_yyy() sanitize_address {
63  store i32 0, i32 *@yyy, align 4
64  ret void
65; CHECK: define void @touch_yyy
66; CHECK-NOT: call void @__asan_report_store4
67; CHECK: ret void
68}
69
70; Check that YYY is NOT instrumented (as it does not have dynamic initializer).
71define void @touch_YYY() sanitize_address {
72  store i32 0, i32 *@YYY, align 4
73  ret void
74; CHECK: define void @touch_YYY
75; CHECK-NOT: call void @__asan_report_store4
76; CHECK: ret void
77}
78