| ; Test alloca instrumentation. |
| ; |
| ; RUN: opt < %s -passes=hwasan -hwasan-with-ifunc=1 -S | FileCheck %s --check-prefixes=CHECK,DYNAMIC-SHADOW,NO-UAR-TAGS |
| ; RUN: opt < %s -passes=hwasan -hwasan-mapping-offset=0 -S | FileCheck %s --check-prefixes=CHECK,ZERO-BASED-SHADOW,NO-UAR-TAGS |
| ; RUN: opt < %s -passes=hwasan -hwasan-with-ifunc=1 -hwasan-uar-retag-to-zero=0 -S | FileCheck %s --check-prefixes=CHECK,DYNAMIC-SHADOW,UAR-TAGS |
| |
| target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128" |
| target triple = "aarch64--linux-android10000" |
| |
| declare void @use32(i32*) |
| |
| define void @test_alloca() sanitize_hwaddress !dbg !15 { |
| ; CHECK-LABEL: @test_alloca( |
| ; CHECK: %[[FP:[^ ]*]] = call i8* @llvm.frameaddress.p0i8(i32 0) |
| ; CHECK: %[[A:[^ ]*]] = ptrtoint i8* %[[FP]] to i64 |
| ; CHECK: %[[B:[^ ]*]] = lshr i64 %[[A]], 20 |
| ; CHECK: %[[BASE_TAG:[^ ]*]] = xor i64 %[[A]], %[[B]] |
| |
| ; CHECK: %[[X:[^ ]*]] = alloca { i32, [12 x i8] }, align 16 |
| ; CHECK: %[[X_BC:[^ ]*]] = bitcast { i32, [12 x i8] }* %[[X]] to i32* |
| ; CHECK: %[[X_TAG:[^ ]*]] = xor i64 %[[BASE_TAG]], 0 |
| ; CHECK: %[[X1:[^ ]*]] = ptrtoint i32* %[[X_BC]] to i64 |
| ; CHECK: %[[C:[^ ]*]] = shl i64 %[[X_TAG]], 56 |
| ; CHECK: %[[D:[^ ]*]] = or i64 %[[X1]], %[[C]] |
| ; CHECK: %[[X_HWASAN:[^ ]*]] = inttoptr i64 %[[D]] to i32* |
| |
| ; CHECK: %[[X_TAG2:[^ ]*]] = trunc i64 %[[X_TAG]] to i8 |
| ; CHECK: %[[E:[^ ]*]] = ptrtoint i32* %[[X_BC]] to i64 |
| ; CHECK: %[[F:[^ ]*]] = lshr i64 %[[E]], 4 |
| ; DYNAMIC-SHADOW: %[[X_SHADOW:[^ ]*]] = getelementptr i8, i8* %.hwasan.shadow, i64 %[[F]] |
| ; ZERO-BASED-SHADOW: %[[X_SHADOW:[^ ]*]] = inttoptr i64 %[[F]] to i8* |
| ; CHECK: %[[X_SHADOW_GEP:[^ ]*]] = getelementptr i8, i8* %[[X_SHADOW]], i32 0 |
| ; CHECK: store i8 4, i8* %[[X_SHADOW_GEP]] |
| ; CHECK: %[[X_I8:[^ ]*]] = bitcast i32* %[[X_BC]] to i8* |
| ; CHECK: %[[X_I8_GEP:[^ ]*]] = getelementptr i8, i8* %[[X_I8]], i32 15 |
| ; CHECK: store i8 %[[X_TAG2]], i8* %[[X_I8_GEP]] |
| ; CHECK: call void @llvm.dbg.value( |
| ; CHECK-SAME: metadata !DIArgList(i32* %[[X_BC]], i32* %[[X_BC]]) |
| ; 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, |
| ; CHECK: call void @use32(i32* nonnull %[[X_HWASAN]]) |
| |
| ; UAR-TAGS: %[[BASE_TAG_COMPL:[^ ]*]] = xor i64 %[[BASE_TAG]], 255 |
| ; UAR-TAGS: %[[X_TAG_UAR:[^ ]*]] = trunc i64 %[[BASE_TAG_COMPL]] to i8 |
| ; CHECK: %[[E2:[^ ]*]] = ptrtoint i32* %[[X_BC]] to i64 |
| ; CHECK: %[[F2:[^ ]*]] = lshr i64 %[[E2]], 4 |
| ; DYNAMIC-SHADOW: %[[X_SHADOW2:[^ ]*]] = getelementptr i8, i8* %.hwasan.shadow, i64 %[[F2]] |
| ; ZERO-BASED-SHADOW: %[[X_SHADOW2:[^ ]*]] = inttoptr i64 %[[F2]] to i8* |
| ; NO-UAR-TAGS: call void @llvm.memset.p0i8.i64(i8* align 1 %[[X_SHADOW2]], i8 0, i64 1, i1 false) |
| ; UAR-TAGS: call void @llvm.memset.p0i8.i64(i8* align 1 %[[X_SHADOW2]], i8 %[[X_TAG_UAR]], i64 1, i1 false) |
| ; CHECK: ret void |
| |
| |
| entry: |
| %x = alloca i32, align 4 |
| 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 |
| call void @use32(i32* nonnull %x), !dbg !23 |
| ret void, !dbg !24 |
| } |
| |
| declare void @llvm.dbg.value(metadata, metadata, metadata) |
| |
| !llvm.dbg.cu = !{!0} |
| !llvm.module.flags = !{!3, !4} |
| !llvm.ident = !{!14} |
| |
| !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) |
| !1 = !DIFile(filename: "alloca.cpp", directory: "/") |
| !2 = !{} |
| !3 = !{i32 7, !"Dwarf Version", i32 4} |
| !4 = !{i32 2, !"Debug Info Version", i32 3} |
| !14 = !{!"clang version 13.0.0"} |
| !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) |
| !16 = !DISubroutineType(types: !17) |
| !17 = !{null} |
| !19 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !20, size: 64) |
| !20 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) |
| !21 = !DILocation(line: 0, scope: !15) |
| !22 = !DILocalVariable(name: "x", scope: !15, file: !1, line: 5, type: !20) |
| !23 = !DILocation(line: 7, column: 5, scope: !15) |
| !24 = !DILocation(line: 8, column: 1, scope: !15) |