1; Test alloca instrumentation.
2;
3; RUN: opt < %s -hwasan -hwasan-with-ifunc=1 -S | FileCheck %s --check-prefixes=CHECK,DYNAMIC-SHADOW,NO-UAR-TAGS
4; RUN: opt < %s -hwasan -hwasan-mapping-offset=0 -S | FileCheck %s --check-prefixes=CHECK,ZERO-BASED-SHADOW,NO-UAR-TAGS
5; RUN: opt < %s -hwasan -hwasan-with-ifunc=1 -hwasan-uar-retag-to-zero=0 -S | FileCheck %s --check-prefixes=CHECK,DYNAMIC-SHADOW,UAR-TAGS
6
7target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128"
8target triple = "aarch64--linux-android10000"
9
10declare void @use32(i32*)
11
12define void @test_alloca() sanitize_hwaddress !dbg !15 {
13; CHECK-LABEL: @test_alloca(
14; CHECK: %[[FP:[^ ]*]] = call i8* @llvm.frameaddress.p0i8(i32 0)
15; CHECK: %[[A:[^ ]*]] = ptrtoint i8* %[[FP]] to i64
16; CHECK: %[[B:[^ ]*]] = lshr i64 %[[A]], 20
17; CHECK: %[[BASE_TAG:[^ ]*]] = xor i64 %[[A]], %[[B]]
18
19; CHECK: %[[X:[^ ]*]] = alloca { i32, [12 x i8] }, align 16
20; CHECK: %[[X_BC:[^ ]*]] = bitcast { i32, [12 x i8] }* %[[X]] to i32*
21; CHECK: %[[X_TAG:[^ ]*]] = xor i64 %[[BASE_TAG]], 0
22; CHECK: %[[X1:[^ ]*]] = ptrtoint i32* %[[X_BC]] to i64
23; CHECK: %[[C:[^ ]*]] = shl i64 %[[X_TAG]], 56
24; CHECK: %[[D:[^ ]*]] = or i64 %[[X1]], %[[C]]
25; CHECK: %[[X_HWASAN:[^ ]*]] = inttoptr i64 %[[D]] to i32*
26
27; CHECK: %[[X_TAG2:[^ ]*]] = trunc i64 %[[X_TAG]] to i8
28; CHECK: %[[E:[^ ]*]] = ptrtoint i32* %[[X_BC]] to i64
29; CHECK: %[[F:[^ ]*]] = lshr i64 %[[E]], 4
30; DYNAMIC-SHADOW: %[[X_SHADOW:[^ ]*]] = getelementptr i8, i8* %.hwasan.shadow, i64 %[[F]]
31; ZERO-BASED-SHADOW: %[[X_SHADOW:[^ ]*]] = inttoptr i64 %[[F]] to i8*
32; CHECK: %[[X_SHADOW_GEP:[^ ]*]] = getelementptr i8, i8* %[[X_SHADOW]], i32 0
33; CHECK: store i8 4, i8* %[[X_SHADOW_GEP]]
34; CHECK: %[[X_I8:[^ ]*]] = bitcast i32* %[[X_BC]] to i8*
35; CHECK: %[[X_I8_GEP:[^ ]*]] = getelementptr i8, i8* %[[X_I8]], i32 15
36; CHECK: store i8 %[[X_TAG2]], i8* %[[X_I8_GEP]]
37; CHECK: call void @llvm.dbg.value(
38; CHECK-SAME: metadata !DIArgList(i32* %[[X_BC]], i32* %[[X_BC]])
39; CHECK-SAME: metadata !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_tag_offset, 0, DW_OP_LLVM_arg, 1, DW_OP_LLVM_tag_offset, 0,
40; CHECK: call void @use32(i32* nonnull %[[X_HWASAN]])
41
42; UAR-TAGS: %[[BASE_TAG_COMPL:[^ ]*]] = xor i64 %[[BASE_TAG]], 255
43; UAR-TAGS: %[[X_TAG_UAR:[^ ]*]] = trunc i64 %[[BASE_TAG_COMPL]] to i8
44; CHECK: %[[E2:[^ ]*]] = ptrtoint i32* %[[X_BC]] to i64
45; CHECK: %[[F2:[^ ]*]] = lshr i64 %[[E2]], 4
46; DYNAMIC-SHADOW: %[[X_SHADOW2:[^ ]*]] = getelementptr i8, i8* %.hwasan.shadow, i64 %[[F2]]
47; ZERO-BASED-SHADOW: %[[X_SHADOW2:[^ ]*]] = inttoptr i64 %[[F2]] to i8*
48; NO-UAR-TAGS: call void @llvm.memset.p0i8.i64(i8* align 1 %[[X_SHADOW2]], i8 0, i64 1, i1 false)
49; UAR-TAGS: call void @llvm.memset.p0i8.i64(i8* align 1 %[[X_SHADOW2]], i8 %[[X_TAG_UAR]], i64 1, i1 false)
50; CHECK: ret void
51
52
53entry:
54  %x = alloca i32, align 4
55  call void @llvm.dbg.value(metadata !DIArgList(i32* %x, i32* %x), metadata !22, metadata !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_plus, DW_OP_deref)), !dbg !21
56  call void @use32(i32* nonnull %x), !dbg !23
57  ret void, !dbg !24
58}
59
60declare void @llvm.dbg.value(metadata, metadata, metadata)
61
62!llvm.dbg.cu = !{!0}
63!llvm.module.flags = !{!3, !4}
64!llvm.ident = !{!14}
65
66!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, producer: "clang version 13.0.0", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None)
67!1 = !DIFile(filename: "alloca.cpp", directory: "/")
68!2 = !{}
69!3 = !{i32 7, !"Dwarf Version", i32 4}
70!4 = !{i32 2, !"Debug Info Version", i32 3}
71!14 = !{!"clang version 13.0.0"}
72!15 = distinct !DISubprogram(name: "test_alloca", linkageName: "_Z11test_allocav", scope: !1, file: !1, line: 4, type: !16, scopeLine: 4, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2)
73!16 = !DISubroutineType(types: !17)
74!17 = !{null}
75!19 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !20, size: 64)
76!20 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
77!21 = !DILocation(line: 0, scope: !15)
78!22 = !DILocalVariable(name: "x", scope: !15, file: !1, line: 5, type: !20)
79!23 = !DILocation(line: 7, column: 5, scope: !15)
80!24 = !DILocation(line: 8, column: 1, scope: !15)
81