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