185 lines
6.8 KiB
LLVM
185 lines
6.8 KiB
LLVM
; RUN: llc -O0 -mtriple=x86_64-unknown-linux-gnu < %s | FileCheck %s
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; Verify that we have correct debug info for local variables in code
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; instrumented with AddressSanitizer.
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; Generated from the source file test.cc:
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; int bar(int y) {
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; return y + 2;
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; }
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; with "clang++ -S -emit-llvm -mllvm -asan-skip-promotable-allocas=0 -fsanitize=address -O0 -g test.cc"
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; The address of the (potentially now malloc'ed) alloca ends up
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; in RDI, after which it is spilled to the stack. We record the
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; spill OFFSET on the stack for checking the debug info below.
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; CHECK: #DEBUG_VALUE: bar:y <- [%RDI+0]
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; CHECK: movq %rdi, [[OFFSET:[0-9]+]](%rsp)
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; CHECK-NEXT: [[START_LABEL:.Ltmp[0-9]+]]
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; CHECK-NEXT: #DEBUG_VALUE: bar:y <- [complex expression]
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; This location should be valid until the end of the function.
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; CHECK: movq %rbp, %rsp
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; CHECK-NEXT: [[END_LABEL:.Ltmp[0-9]+]]:
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; CHECK: .Ldebug_loc{{[0-9]+}}:
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; We expect two location ranges for the variable.
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; First, its address is stored in %rdi:
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; CHECK: .quad .Lfunc_begin0-.Lfunc_begin0
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; CHECK-NEXT: .quad [[START_LABEL]]-.Lfunc_begin0
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; CHECK: DW_OP_breg5
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; Then it's addressed via %rsp:
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; CHECK: .quad [[START_LABEL]]-.Lfunc_begin0
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; CHECK-NEXT: .quad [[END_LABEL]]-.Lfunc_begin0
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; CHECK: DW_OP_breg7
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; CHECK-NEXT: [[OFFSET]]
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; CHECK: DW_OP_deref
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; ModuleID = 'test.cc'
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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@llvm.global_ctors = appending global [1 x { i32, void ()* }] [{ i32, void ()* } { i32 1, void ()* @asan.module_ctor }]
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@__asan_option_detect_stack_use_after_return = external global i32
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@__asan_gen_ = private unnamed_addr constant [16 x i8] c"1 32 4 6 y.addr\00", align 1
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; Function Attrs: nounwind sanitize_address uwtable
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define i32 @_Z3bari(i32 %y) #0 !dbg !4 {
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entry:
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%MyAlloca = alloca [64 x i8], align 32
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%0 = ptrtoint [64 x i8]* %MyAlloca to i64
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%1 = load i32, i32* @__asan_option_detect_stack_use_after_return
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%2 = icmp ne i32 %1, 0
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br i1 %2, label %3, label %5
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; <label>:3 ; preds = %entry
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%4 = call i64 @__asan_stack_malloc_0(i64 64, i64 %0)
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br label %5
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; <label>:5 ; preds = %entry, %3
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%6 = phi i64 [ %0, %entry ], [ %4, %3 ]
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%7 = add i64 %6, 32
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%8 = inttoptr i64 %7 to i32*
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%9 = inttoptr i64 %6 to i64*
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store i64 1102416563, i64* %9
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%10 = add i64 %6, 8
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%11 = inttoptr i64 %10 to i64*
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store i64 ptrtoint ([16 x i8]* @__asan_gen_ to i64), i64* %11
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%12 = add i64 %6, 16
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%13 = inttoptr i64 %12 to i64*
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store i64 ptrtoint (i32 (i32)* @_Z3bari to i64), i64* %13
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%14 = lshr i64 %6, 3
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%15 = add i64 %14, 2147450880
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%16 = add i64 %15, 0
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%17 = inttoptr i64 %16 to i64*
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store i64 -868083100587789839, i64* %17
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%18 = ptrtoint i32* %8 to i64
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%19 = lshr i64 %18, 3
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%20 = add i64 %19, 2147450880
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%21 = inttoptr i64 %20 to i8*
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%22 = load i8, i8* %21
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%23 = icmp ne i8 %22, 0
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call void @llvm.dbg.declare(metadata i32* %8, metadata !12, metadata !14), !dbg !DILocation(scope: !4)
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br i1 %23, label %24, label %30
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; <label>:24 ; preds = %5
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%25 = and i64 %18, 7
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%26 = add i64 %25, 3
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%27 = trunc i64 %26 to i8
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%28 = icmp sge i8 %27, %22
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br i1 %28, label %29, label %30
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; <label>:29 ; preds = %24
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call void @__asan_report_store4(i64 %18)
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call void asm sideeffect "", ""()
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unreachable
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; <label>:30 ; preds = %24, %5
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store i32 %y, i32* %8, align 4
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%31 = ptrtoint i32* %8 to i64, !dbg !13
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%32 = lshr i64 %31, 3, !dbg !13
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%33 = add i64 %32, 2147450880, !dbg !13
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%34 = inttoptr i64 %33 to i8*, !dbg !13
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%35 = load i8, i8* %34, !dbg !13
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%36 = icmp ne i8 %35, 0, !dbg !13
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br i1 %36, label %37, label %43, !dbg !13
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; <label>:37 ; preds = %30
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%38 = and i64 %31, 7, !dbg !13
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%39 = add i64 %38, 3, !dbg !13
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%40 = trunc i64 %39 to i8, !dbg !13
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%41 = icmp sge i8 %40, %35, !dbg !13
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br i1 %41, label %42, label %43
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; <label>:42 ; preds = %37
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call void @__asan_report_load4(i64 %31), !dbg !13
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call void asm sideeffect "", ""()
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unreachable
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; <label>:43 ; preds = %37, %30
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%44 = load i32, i32* %8, align 4, !dbg !13
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%add = add nsw i32 %44, 2, !dbg !13
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store i64 1172321806, i64* %9, !dbg !13
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%45 = icmp ne i64 %6, %0, !dbg !13
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br i1 %45, label %46, label %53, !dbg !13
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; <label>:46 ; preds = %43
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%47 = add i64 %15, 0, !dbg !13
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%48 = inttoptr i64 %47 to i64*, !dbg !13
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store i64 -723401728380766731, i64* %48, !dbg !13
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%49 = add i64 %6, 56, !dbg !13
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%50 = inttoptr i64 %49 to i64*, !dbg !13
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%51 = load i64, i64* %50, !dbg !13
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%52 = inttoptr i64 %51 to i8*, !dbg !13
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store i8 0, i8* %52, !dbg !13
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br label %56, !dbg !13
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; <label>:53 ; preds = %43
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%54 = add i64 %15, 0, !dbg !13
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%55 = inttoptr i64 %54 to i64*, !dbg !13
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store i64 0, i64* %55, !dbg !13
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br label %56, !dbg !13
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; <label>:56 ; preds = %53, %46
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ret i32 %add, !dbg !13
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}
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; Function Attrs: nounwind readnone
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declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
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define internal void @asan.module_ctor() {
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call void @__asan_init_v3()
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ret void
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}
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declare void @__asan_init_v3()
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declare void @__asan_report_load4(i64)
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declare void @__asan_report_store4(i64)
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declare i64 @__asan_stack_malloc_0(i64, i64)
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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" }
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attributes #1 = { nounwind readnone }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!9, !10}
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!llvm.ident = !{!11}
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!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)
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!1 = !DIFile(filename: "test.cc", directory: "/llvm_cmake_gcc")
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!2 = !{}
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!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)
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!5 = !DIFile(filename: "test.cc", directory: "/llvm_cmake_gcc")
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!6 = !DISubroutineType(types: !7)
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!7 = !{!8, !8}
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!8 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
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!9 = !{i32 2, !"Dwarf Version", i32 4}
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!10 = !{i32 2, !"Debug Info Version", i32 3}
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!11 = !{!"clang version 3.5.0 (209308)"}
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!12 = !DILocalVariable(name: "y", line: 1, arg: 1, scope: !4, file: !5, type: !8)
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!13 = !DILocation(line: 2, scope: !4)
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!14 = !DIExpression(DW_OP_deref)
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