1 ; RUN: opt < %s -asan -asan-module -S | FileCheck %s
2 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"
3 target 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
10 !0 = !{i32* @xxx, null, null, i1 true, i1 false}
11 !1 = !{i32* @XXX, null, null, i1 true, i1 false}
12 !2 = !{i32* @yyy, null, null, i1 false, i1 false}
13 !3 = !{i32* @YYY, null, null, i1 false, i1 false}
14 !llvm.asan.globals = !{!0, !1, !2, !3}
16 define i32 @initializer() uwtable {
21 define internal void @__cxx_global_var_init() section ".text.startup" {
23 %call = call i32 @initializer()
24 store i32 %call, i32* @xxx, align 4
28 @llvm.global_ctors = appending global [2 x { i32, void ()* }] [{ i32, void ()* } { i32 65535, void ()* @__late_ctor }, { i32, void ()* } { i32 0, void ()* @__early_ctor }]
30 define internal void @__late_ctor() sanitize_address section ".text.startup" {
32 call void @__cxx_global_var_init()
36 ; Clang indicated that @xxx was dynamically initailized.
37 ; __asan_{before,after}_dynamic_init should be called from __late_ctor
39 ; CHECK-LABEL: define internal void @__late_ctor
41 ; CHECK: call void @__asan_before_dynamic_init
42 ; CHECK: call void @__cxx_global_var_init
43 ; CHECK: call void @__asan_after_dynamic_init
46 ; CTOR with priority 0 should not be instrumented.
47 define internal void @__early_ctor() sanitize_address section ".text.startup" {
49 call void @__cxx_global_var_init()
52 ; CHECK-LABEL: define internal void @__early_ctor
56 ; Check that xxx is instrumented.
57 define void @touch_xxx() sanitize_address {
58 store i32 0, i32 *@xxx, align 4
60 ; CHECK-LABEL: touch_xxx
61 ; CHECK: call void @__asan_report_store4
65 ; Check that XXX is instrumented.
66 define void @touch_XXX() sanitize_address {
67 store i32 0, i32 *@XXX, align 4
69 ; CHECK: define void @touch_XXX
70 ; CHECK: call void @__asan_report_store4
75 ; Check that yyy is NOT instrumented (as it does not have dynamic initializer).
76 define void @touch_yyy() sanitize_address {
77 store i32 0, i32 *@yyy, align 4
79 ; CHECK: define void @touch_yyy
80 ; CHECK-NOT: call void @__asan_report_store4
84 ; Check that YYY is NOT instrumented (as it does not have dynamic initializer).
85 define void @touch_YYY() sanitize_address {
86 store i32 0, i32 *@YYY, align 4
88 ; CHECK: define void @touch_YYY
89 ; CHECK-NOT: call void @__asan_report_store4