1 ; RUN: opt -S -asan %s | FileCheck %s 2 3 ; The IR of this testcase is generated from the following C code: 4 ; void bar (int); 5 ; 6 ; void foo() { 7 ; __block int x; 8 ; bar(x); 9 ; } 10 ; by compiling it with 'clang -emit-llvm -g -S' and then by manually 11 ; adding the sanitize_address attribute to the @foo() function (so 12 ; that ASAN accepts to instrument the function in the above opt run). 13 14 ; Check that the location of the ASAN instrumented __block variable is 15 ; correct. 16 ; CHECK: !DIExpression(DW_OP_deref, DW_OP_plus, 8, DW_OP_deref, DW_OP_plus, 24) 17 18 target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128" 19 20 %struct.__block_byref_x = type { i8*, %struct.__block_byref_x*, i32, i32, i32 } 21 22 ; Function Attrs: nounwind ssp uwtable 23 define void @foo() #0 !dbg !4 { 24 entry: 25 %x = alloca %struct.__block_byref_x, align 8 26 call void @llvm.dbg.declare(metadata %struct.__block_byref_x* %x, metadata !12, metadata !22), !dbg !23 27 %byref.isa = getelementptr inbounds %struct.__block_byref_x, %struct.__block_byref_x* %x, i32 0, i32 0, !dbg !24 28 store i8* null, i8** %byref.isa, !dbg !24 29 %byref.forwarding = getelementptr inbounds %struct.__block_byref_x, %struct.__block_byref_x* %x, i32 0, i32 1, !dbg !24 30 store %struct.__block_byref_x* %x, %struct.__block_byref_x** %byref.forwarding, !dbg !24 31 %byref.flags = getelementptr inbounds %struct.__block_byref_x, %struct.__block_byref_x* %x, i32 0, i32 2, !dbg !24 32 store i32 0, i32* %byref.flags, !dbg !24 33 %byref.size = getelementptr inbounds %struct.__block_byref_x, %struct.__block_byref_x* %x, i32 0, i32 3, !dbg !24 34 store i32 32, i32* %byref.size, !dbg !24 35 %forwarding = getelementptr inbounds %struct.__block_byref_x, %struct.__block_byref_x* %x, i32 0, i32 1, !dbg !25 36 %0 = load %struct.__block_byref_x*, %struct.__block_byref_x** %forwarding, !dbg !25 37 %x1 = getelementptr inbounds %struct.__block_byref_x, %struct.__block_byref_x* %0, i32 0, i32 4, !dbg !25 38 %1 = load i32, i32* %x1, align 4, !dbg !25 39 call void @bar(i32 %1), !dbg !25 40 %2 = bitcast %struct.__block_byref_x* %x to i8*, !dbg !26 41 call void @_Block_object_dispose(i8* %2, i32 8) #3, !dbg !26 42 ret void, !dbg !26 43 } 44 45 ; Function Attrs: nounwind readnone 46 declare void @llvm.dbg.declare(metadata, metadata, metadata) #1 47 48 declare void @bar(i32) #2 49 50 declare void @_Block_object_dispose(i8*, i32) 51 52 attributes #0 = { nounwind ssp uwtable sanitize_address "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" } 53 attributes #1 = { nounwind readnone } 54 attributes #2 = { "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" } 55 attributes #3 = { nounwind } 56 57 !llvm.dbg.cu = !{!0} 58 !llvm.module.flags = !{!8, !9, !10} 59 !llvm.ident = !{!11} 60 61 !0 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang version 3.6.0 (trunk 223120) (llvm/trunk 223119)", isOptimized: false, emissionKind: FullDebug, file: !1, enums: !2, retainedTypes: !2, globals: !2, imports: !2) 62 !1 = !DIFile(filename: "block.c", directory: "/tmp") 63 !2 = !{} 64 !4 = distinct !DISubprogram(name: "foo", line: 3, isLocal: false, isDefinition: true, isOptimized: false, unit: !0, scopeLine: 3, file: !1, scope: !5, type: !6, variables: !2) 65 !5 = !DIFile(filename: "block.c", directory: "/tmp") 66 !6 = !DISubroutineType(types: !7) 67 !7 = !{null} 68 !8 = !{i32 2, !"Dwarf Version", i32 2} 69 !9 = !{i32 2, !"Debug Info Version", i32 3} 70 !10 = !{i32 1, !"PIC Level", i32 2} 71 !11 = !{!"clang version 3.6.0 (trunk 223120) (llvm/trunk 223119)"} 72 !12 = !DILocalVariable(name: "x", line: 4, scope: !4, file: !5, type: !13) 73 !13 = !DICompositeType(tag: DW_TAG_structure_type, size: 224, flags: DIFlagBlockByrefStruct, file: !1, scope: !5, elements: !14) 74 !14 = !{!15, !17, !18, !20, !21} 75 !15 = !DIDerivedType(tag: DW_TAG_member, name: "__isa", size: 64, align: 64, file: !1, scope: !5, baseType: !16) 76 !16 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: null) 77 !17 = !DIDerivedType(tag: DW_TAG_member, name: "__forwarding", size: 64, align: 64, offset: 64, file: !1, scope: !5, baseType: !16) 78 !18 = !DIDerivedType(tag: DW_TAG_member, name: "__flags", size: 32, align: 32, offset: 128, file: !1, scope: !5, baseType: !19) 79 !19 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed) 80 !20 = !DIDerivedType(tag: DW_TAG_member, name: "__size", size: 32, align: 32, offset: 160, file: !1, scope: !5, baseType: !19) 81 !21 = !DIDerivedType(tag: DW_TAG_member, name: "x", size: 32, align: 32, offset: 192, file: !1, scope: !5, baseType: !19) 82 !22 = !DIExpression(DW_OP_plus, 8, DW_OP_deref, DW_OP_plus, 24) 83 !23 = !DILocation(line: 4, column: 15, scope: !4) 84 !24 = !DILocation(line: 4, column: 3, scope: !4) 85 !25 = !DILocation(line: 5, column: 3, scope: !4) 86 !26 = !DILocation(line: 6, column: 1, scope: !4) 87
