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 ; This location should be valid until the end of the function. 19 20 ; CHECK: .Ldebug_loc{{[0-9]+}}: 21 ; We expect two location ranges for the variable. 22 23 ; First, its address is stored in %rdi: 24 ; CHECK: .quad .Lfunc_begin0-.Lfunc_begin0 25 ; CHECK-NEXT: .quad [[START_LABEL]]-.Lfunc_begin0 26 ; CHECK: DW_OP_breg5 27 28 ; Then it's addressed via %rsp: 29 ; CHECK: .quad [[START_LABEL]]-.Lfunc_begin0 30 ; CHECK-NEXT: .Lfunc_end0-.Lfunc_begin0 31 ; CHECK: DW_OP_breg7 32 ; CHECK-NEXT: [[OFFSET]] 33 ; CHECK: DW_OP_deref 34 35 ; ModuleID = 'test.cc' 36 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" 37 target triple = "x86_64-unknown-linux-gnu" 38 39 @llvm.global_ctors = appending global [1 x { i32, void ()* }] [{ i32, void ()* } { i32 1, void ()* @asan.module_ctor }] 40 @__asan_option_detect_stack_use_after_return = external global i32 41 @__asan_gen_ = private unnamed_addr constant [16 x i8] c"1 32 4 6 y.addr\00", align 1 42 43 ; Function Attrs: nounwind sanitize_address uwtable 44 define i32 @_Z3bari(i32 %y) #0 !dbg !4 { 45 entry: 46 %MyAlloca = alloca [64 x i8], align 32 47 %0 = ptrtoint [64 x i8]* %MyAlloca to i64 48 %1 = load i32, i32* @__asan_option_detect_stack_use_after_return 49 %2 = icmp ne i32 %1, 0 50 br i1 %2, label %3, label %5 51 52 ; <label>:3 ; preds = %entry 53 %4 = call i64 @__asan_stack_malloc_0(i64 64, i64 %0) 54 br label %5 55 56 ; <label>:5 ; preds = %entry, %3 57 %6 = phi i64 [ %0, %entry ], [ %4, %3 ] 58 %7 = add i64 %6, 32 59 %8 = inttoptr i64 %7 to i32* 60 %9 = inttoptr i64 %6 to i64* 61 store i64 1102416563, i64* %9 62 %10 = add i64 %6, 8 63 %11 = inttoptr i64 %10 to i64* 64 store i64 ptrtoint ([16 x i8]* @__asan_gen_ to i64), i64* %11 65 %12 = add i64 %6, 16 66 %13 = inttoptr i64 %12 to i64* 67 store i64 ptrtoint (i32 (i32)* @_Z3bari to i64), i64* %13 68 %14 = lshr i64 %6, 3 69 %15 = add i64 %14, 2147450880 70 %16 = add i64 %15, 0 71 %17 = inttoptr i64 %16 to i64* 72 store i64 -868083100587789839, i64* %17 73 %18 = ptrtoint i32* %8 to i64 74 %19 = lshr i64 %18, 3 75 %20 = add i64 %19, 2147450880 76 %21 = inttoptr i64 %20 to i8* 77 %22 = load i8, i8* %21 78 %23 = icmp ne i8 %22, 0 79 call void @llvm.dbg.declare(metadata i32* %8, metadata !12, metadata !14), !dbg !DILocation(scope: !4) 80 br i1 %23, label %24, label %30 81 82 ; <label>:24 ; preds = %5 83 %25 = and i64 %18, 7 84 %26 = add i64 %25, 3 85 %27 = trunc i64 %26 to i8 86 %28 = icmp sge i8 %27, %22 87 br i1 %28, label %29, label %30 88 89 ; <label>:29 ; preds = %24 90 call void @__asan_report_store4(i64 %18) 91 call void asm sideeffect "", ""() 92 unreachable 93 94 ; <label>:30 ; preds = %24, %5 95 store i32 %y, i32* %8, align 4 96 %31 = ptrtoint i32* %8 to i64, !dbg !13 97 %32 = lshr i64 %31, 3, !dbg !13 98 %33 = add i64 %32, 2147450880, !dbg !13 99 %34 = inttoptr i64 %33 to i8*, !dbg !13 100 %35 = load i8, i8* %34, !dbg !13 101 %36 = icmp ne i8 %35, 0, !dbg !13 102 br i1 %36, label %37, label %43, !dbg !13 103 104 ; <label>:37 ; preds = %30 105 %38 = and i64 %31, 7, !dbg !13 106 %39 = add i64 %38, 3, !dbg !13 107 %40 = trunc i64 %39 to i8, !dbg !13 108 %41 = icmp sge i8 %40, %35, !dbg !13 109 br i1 %41, label %42, label %43 110 111 ; <label>:42 ; preds = %37 112 call void @__asan_report_load4(i64 %31), !dbg !13 113 call void asm sideeffect "", ""() 114 unreachable 115 116 ; <label>:43 ; preds = %37, %30 117 %44 = load i32, i32* %8, align 4, !dbg !13 118 %add = add nsw i32 %44, 2, !dbg !13 119 store i64 1172321806, i64* %9, !dbg !13 120 %45 = icmp ne i64 %6, %0, !dbg !13 121 br i1 %45, label %46, label %53, !dbg !13 122 123 ; <label>:46 ; preds = %43 124 %47 = add i64 %15, 0, !dbg !13 125 %48 = inttoptr i64 %47 to i64*, !dbg !13 126 store i64 -723401728380766731, i64* %48, !dbg !13 127 %49 = add i64 %6, 56, !dbg !13 128 %50 = inttoptr i64 %49 to i64*, !dbg !13 129 %51 = load i64, i64* %50, !dbg !13 130 %52 = inttoptr i64 %51 to i8*, !dbg !13 131 store i8 0, i8* %52, !dbg !13 132 br label %56, !dbg !13 133 134 ; <label>:53 ; preds = %43 135 %54 = add i64 %15, 0, !dbg !13 136 %55 = inttoptr i64 %54 to i64*, !dbg !13 137 store i64 0, i64* %55, !dbg !13 138 br label %56, !dbg !13 139 140 ; <label>:56 ; preds = %53, %46 141 ret i32 %add, !dbg !13 142 } 143 144 ; Function Attrs: nounwind readnone 145 declare void @llvm.dbg.declare(metadata, metadata, metadata) #1 146 147 define internal void @asan.module_ctor() { 148 call void @__asan_init_v3() 149 ret void 150 } 151 152 declare void @__asan_init_v3() 153 154 declare void @__asan_report_load4(i64) 155 156 declare void @__asan_report_store4(i64) 157 158 declare i64 @__asan_stack_malloc_0(i64, i64) 159 160 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" } 161 attributes #1 = { nounwind readnone } 162 163 !llvm.dbg.cu = !{!0} 164 !llvm.module.flags = !{!9, !10} 165 !llvm.ident = !{!11} 166 167 !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.5.0 (209308)", isOptimized: false, emissionKind: 1, file: !1, enums: !2, retainedTypes: !2, subprograms: !3, globals: !2, imports: !2) 168 !1 = !DIFile(filename: "test.cc", directory: "/llvm_cmake_gcc") 169 !2 = !{} 170 !3 = !{!4} 171 !4 = distinct !DISubprogram(name: "bar", linkageName: "_Z3bari", line: 1, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 1, file: !1, scope: !5, type: !6, variables: !2) 172 !5 = !DIFile(filename: "test.cc", directory: "/llvm_cmake_gcc") 173 !6 = !DISubroutineType(types: !7) 174 !7 = !{!8, !8} 175 !8 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed) 176 !9 = !{i32 2, !"Dwarf Version", i32 4} 177 !10 = !{i32 2, !"Debug Info Version", i32 3} 178 !11 = !{!"clang version 3.5.0 (209308)"} 179 !12 = !DILocalVariable(name: "y", line: 1, arg: 1, scope: !4, file: !5, type: !8) 180 !13 = !DILocation(line: 2, scope: !4) 181 !14 = !DIExpression(DW_OP_deref) 182
