1 ; RUN: llc -O0 -mtriple=x86_64-unknown-linux-gnu < %s | FileCheck %s 2 3 ; Verify that we have correct debug info for local variables in code 4 ; instrumented with AddressSanitizer. 5 6 ; Generated from the source file test.cc: 7 ; int bar(int y) { 8 ; return y + 2; 9 ; } 10 ; with "clang++ -S -emit-llvm -mllvm -asan-skip-promotable-allocas=0 -fsanitize=address -O0 -g test.cc" 11 12 ; The address of the (potentially now malloc'ed) alloca ends up 13 ; in RDI, after which it is spilled to the stack. We record the 14 ; spill OFFSET on the stack for checking the debug info below. 15 ; CHECK: #DEBUG_VALUE: bar:y <- [%RDI+0] 16 ; CHECK: movq %rdi, [[OFFSET:[0-9]+]](%rsp) 17 ; CHECK-NEXT: [[START_LABEL:.Ltmp[0-9]+]] 18 ; CHECK-NEXT: #DEBUG_VALUE: bar:y <- [complex expression] 19 ; This location should be valid until the end of the function. 20 21 ; CHECK: movq %rbp, %rsp 22 ; CHECK-NEXT: [[END_LABEL:.Ltmp[0-9]+]]: 23 24 ; CHECK: .Ldebug_loc{{[0-9]+}}: 25 ; We expect two location ranges for the variable. 26 27 ; First, its address is stored in %rdi: 28 ; CHECK: .quad .Lfunc_begin0-.Lfunc_begin0 29 ; CHECK-NEXT: .quad [[START_LABEL]]-.Lfunc_begin0 30 ; CHECK: DW_OP_breg5 31 32 ; Then it's addressed via %rsp: 33 ; CHECK: .quad [[START_LABEL]]-.Lfunc_begin0 34 ; CHECK-NEXT: .quad [[END_LABEL]]-.Lfunc_begin0 35 ; CHECK: DW_OP_breg7 36 ; CHECK-NEXT: [[OFFSET]] 37 ; CHECK: DW_OP_deref 38 39 ; ModuleID = 'test.cc' 40 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" 41 target triple = "x86_64-unknown-linux-gnu" 42 43 @llvm.global_ctors = appending global [1 x { i32, void ()* }] [{ i32, void ()* } { i32 1, void ()* @asan.module_ctor }] 44 @__asan_option_detect_stack_use_after_return = external global i32 45 @__asan_gen_ = private unnamed_addr constant [16 x i8] c"1 32 4 6 y.addr\00", align 1 46 47 ; Function Attrs: nounwind sanitize_address uwtable 48 define i32 @_Z3bari(i32 %y) #0 !dbg !4 { 49 entry: 50 %MyAlloca = alloca [64 x i8], align 32 51 %0 = ptrtoint [64 x i8]* %MyAlloca to i64 52 %1 = load i32, i32* @__asan_option_detect_stack_use_after_return 53 %2 = icmp ne i32 %1, 0 54 br i1 %2, label %3, label %5 55 56 ; <label>:3 ; preds = %entry 57 %4 = call i64 @__asan_stack_malloc_0(i64 64, i64 %0) 58 br label %5 59 60 ; <label>:5 ; preds = %entry, %3 61 %6 = phi i64 [ %0, %entry ], [ %4, %3 ] 62 %7 = add i64 %6, 32 63 %8 = inttoptr i64 %7 to i32* 64 %9 = inttoptr i64 %6 to i64* 65 store i64 1102416563, i64* %9 66 %10 = add i64 %6, 8 67 %11 = inttoptr i64 %10 to i64* 68 store i64 ptrtoint ([16 x i8]* @__asan_gen_ to i64), i64* %11 69 %12 = add i64 %6, 16 70 %13 = inttoptr i64 %12 to i64* 71 store i64 ptrtoint (i32 (i32)* @_Z3bari to i64), i64* %13 72 %14 = lshr i64 %6, 3 73 %15 = add i64 %14, 2147450880 74 %16 = add i64 %15, 0 75 %17 = inttoptr i64 %16 to i64* 76 store i64 -868083100587789839, i64* %17 77 %18 = ptrtoint i32* %8 to i64 78 %19 = lshr i64 %18, 3 79 %20 = add i64 %19, 2147450880 80 %21 = inttoptr i64 %20 to i8* 81 %22 = load i8, i8* %21 82 %23 = icmp ne i8 %22, 0 83 call void @llvm.dbg.declare(metadata i32* %8, metadata !12, metadata !14), !dbg !DILocation(scope: !4) 84 br i1 %23, label %24, label %30 85 86 ; <label>:24 ; preds = %5 87 %25 = and i64 %18, 7 88 %26 = add i64 %25, 3 89 %27 = trunc i64 %26 to i8 90 %28 = icmp sge i8 %27, %22 91 br i1 %28, label %29, label %30 92 93 ; <label>:29 ; preds = %24 94 call void @__asan_report_store4(i64 %18) 95 call void asm sideeffect "", ""() 96 unreachable 97 98 ; <label>:30 ; preds = %24, %5 99 store i32 %y, i32* %8, align 4 100 %31 = ptrtoint i32* %8 to i64, !dbg !13 101 %32 = lshr i64 %31, 3, !dbg !13 102 %33 = add i64 %32, 2147450880, !dbg !13 103 %34 = inttoptr i64 %33 to i8*, !dbg !13 104 %35 = load i8, i8* %34, !dbg !13 105 %36 = icmp ne i8 %35, 0, !dbg !13 106 br i1 %36, label %37, label %43, !dbg !13 107 108 ; <label>:37 ; preds = %30 109 %38 = and i64 %31, 7, !dbg !13 110 %39 = add i64 %38, 3, !dbg !13 111 %40 = trunc i64 %39 to i8, !dbg !13 112 %41 = icmp sge i8 %40, %35, !dbg !13 113 br i1 %41, label %42, label %43 114 115 ; <label>:42 ; preds = %37 116 call void @__asan_report_load4(i64 %31), !dbg !13 117 call void asm sideeffect "", ""() 118 unreachable 119 120 ; <label>:43 ; preds = %37, %30 121 %44 = load i32, i32* %8, align 4, !dbg !13 122 %add = add nsw i32 %44, 2, !dbg !13 123 store i64 1172321806, i64* %9, !dbg !13 124 %45 = icmp ne i64 %6, %0, !dbg !13 125 br i1 %45, label %46, label %53, !dbg !13 126 127 ; <label>:46 ; preds = %43 128 %47 = add i64 %15, 0, !dbg !13 129 %48 = inttoptr i64 %47 to i64*, !dbg !13 130 store i64 -723401728380766731, i64* %48, !dbg !13 131 %49 = add i64 %6, 56, !dbg !13 132 %50 = inttoptr i64 %49 to i64*, !dbg !13 133 %51 = load i64, i64* %50, !dbg !13 134 %52 = inttoptr i64 %51 to i8*, !dbg !13 135 store i8 0, i8* %52, !dbg !13 136 br label %56, !dbg !13 137 138 ; <label>:53 ; preds = %43 139 %54 = add i64 %15, 0, !dbg !13 140 %55 = inttoptr i64 %54 to i64*, !dbg !13 141 store i64 0, i64* %55, !dbg !13 142 br label %56, !dbg !13 143 144 ; <label>:56 ; preds = %53, %46 145 ret i32 %add, !dbg !13 146 } 147 148 ; Function Attrs: nounwind readnone 149 declare void @llvm.dbg.declare(metadata, metadata, metadata) #1 150 151 define internal void @asan.module_ctor() { 152 call void @__asan_init_v3() 153 ret void 154 } 155 156 declare void @__asan_init_v3() 157 158 declare void @__asan_report_load4(i64) 159 160 declare void @__asan_report_store4(i64) 161 162 declare i64 @__asan_stack_malloc_0(i64, i64) 163 164 attributes #0 = { nounwind sanitize_address uwtable "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" } 165 attributes #1 = { nounwind readnone } 166 167 !llvm.dbg.cu = !{!0} 168 !llvm.module.flags = !{!9, !10} 169 !llvm.ident = !{!11} 170 171 !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.5.0 (209308)", isOptimized: false, emissionKind: FullDebug, file: !1, enums: !2, retainedTypes: !2, globals: !2, imports: !2) 172 !1 = !DIFile(filename: "test.cc", directory: "/llvm_cmake_gcc") 173 !2 = !{} 174 !4 = distinct !DISubprogram(name: "bar", linkageName: "_Z3bari", line: 1, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 1, file: !1, scope: !5, type: !6, variables: !2) 175 !5 = !DIFile(filename: "test.cc", directory: "/llvm_cmake_gcc") 176 !6 = !DISubroutineType(types: !7) 177 !7 = !{!8, !8} 178 !8 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed) 179 !9 = !{i32 2, !"Dwarf Version", i32 4} 180 !10 = !{i32 2, !"Debug Info Version", i32 3} 181 !11 = !{!"clang version 3.5.0 (209308)"} 182 !12 = !DILocalVariable(name: "y", line: 1, arg: 1, scope: !4, file: !5, type: !8) 183 !13 = !DILocation(line: 2, scope: !4) 184 !14 = !DIExpression(DW_OP_deref) 185
