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c389de3c21
Summary:
Currently these function return the raw content of the appropriate table
header, which means they are relative to the DW_AT_{loc,rng}list_base,
and one has to relocate them in order to do anything.
This changes the functions to perform the relocation themselves, which
seems more clearer, particularly as they are sitting right next to the
find{Rng,Loc}listFromOffset functions, but one *cannot* simply take the
result of these functions and take pass them there.
The only effect of this patch is to change what value is dumped for the
DW_AT_ranges attribute, which I think is for the better, as previously
the values appeared to point into thin air.
(The main reason I am looking at this is because I was trying to
implement equivalent functionality in lldb's DWARFUnit, and was stumped
by this behavior.
Reviewers: dblaikie, JDevlieghere, aprantl
Subscribers: hiraditya, llvm-commits, SouraVX
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D71006
79 lines
3.8 KiB
LLVM
79 lines
3.8 KiB
LLVM
; RUN: llc -split-dwarf-file=foo.dwo -mtriple=x86_64-unknown-linux-gnu -filetype=obj < %s \
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; RUN: | llvm-dwarfdump -v -debug-info -debug-rnglists - | FileCheck %s
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; CHECK: .debug_info contents:
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; CHECK: .debug_info.dwo contents:
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; CHECK: DW_AT_ranges [DW_FORM_rnglistx] (indexed (0x0) rangelist = 0x00000010
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; CHECK: [0x0000000000000001, 0x000000000000000c) ".text"
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; CHECK: [0x000000000000000e, 0x0000000000000013) ".text")
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; CHECK: .debug_rnglists.dwo contents:
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; CHECK: 0x00000000: range list header: length = 0x00000015, version = 0x0005, addr_size = 0x08, seg_size = 0x00, offset_entry_count = 0x00000001
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; CHECK: offsets: [
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; CHECK: 0x00000004 => 0x00000010
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; CHECK: ]
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; CHECK: ranges:
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; CHECK: 0x00000010: [DW_RLE_base_addressx]: 0x0000000000000000
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; CHECK: 0x00000012: [DW_RLE_offset_pair ]: 0x0000000000000001, 0x000000000000000c => [0x0000000000000001, 0x000000000000000c)
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; CHECK: 0x00000015: [DW_RLE_offset_pair ]: 0x000000000000000e, 0x0000000000000013 => [0x000000000000000e, 0x0000000000000013)
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; CHECK: 0x00000018: [DW_RLE_end_of_list ]
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; Function Attrs: noinline optnone uwtable
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define dso_local void @_Z2f3v() !dbg !7 {
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entry:
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%x = alloca i32, align 4
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call void @llvm.dbg.declare(metadata i32* %x, metadata !10, metadata !DIExpression()), !dbg !13
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%call = call i32 @_Z2f2v(), !dbg !14
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store i32 %call, i32* %x, align 4, !dbg !13
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%0 = load i32, i32* %x, align 4, !dbg !13
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%tobool = icmp ne i32 %0, 0, !dbg !13
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br i1 %tobool, label %if.then, label %if.end, !dbg !15
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if.then: ; preds = %entry
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call void @_Z2f1v(), !dbg !16
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br label %if.end, !dbg !18
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if.end: ; preds = %if.then, %entry
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ret void, !dbg !19
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}
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; Function Attrs: nounwind readnone speculatable
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declare void @llvm.dbg.declare(metadata, metadata, metadata)
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declare dso_local i32 @_Z2f2v()
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declare dso_local void @_Z2f1v()
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; Function Attrs: noinline nounwind optnone uwtable
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define dso_local void @_Z2f4v() #3 section "x" !dbg !20 {
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entry:
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ret void, !dbg !21
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}
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4, !5}
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!llvm.ident = !{!6}
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!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 8.0.0 (trunk 344806) (llvm/trunk 344835)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: GNU)
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!1 = !DIFile(filename: "ranges.cpp", directory: "/usr/local/google/home/blaikie/dev/scratch", checksumkind: CSK_MD5, checksum: "a1e825b91fba21d696f05eb06d440aa3")
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!2 = !{}
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!3 = !{i32 2, !"Dwarf Version", i32 5}
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!4 = !{i32 2, !"Debug Info Version", i32 3}
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!5 = !{i32 1, !"wchar_size", i32 4}
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!6 = !{!"clang version 8.0.0 (trunk 344806) (llvm/trunk 344835)"}
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!7 = distinct !DISubprogram(name: "f3", linkageName: "_Z2f3v", scope: !1, file: !1, line: 3, type: !8, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)
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!8 = !DISubroutineType(types: !9)
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!9 = !{null}
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!10 = !DILocalVariable(name: "x", scope: !11, file: !1, line: 4, type: !12)
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!11 = distinct !DILexicalBlock(scope: !7, file: !1, line: 4, column: 11)
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!12 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!13 = !DILocation(line: 4, column: 11, scope: !11)
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!14 = !DILocation(line: 4, column: 15, scope: !11)
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!15 = !DILocation(line: 4, column: 11, scope: !7)
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!16 = !DILocation(line: 5, column: 5, scope: !17)
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!17 = distinct !DILexicalBlock(scope: !11, file: !1, line: 4, column: 21)
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!18 = !DILocation(line: 6, column: 3, scope: !17)
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!19 = !DILocation(line: 7, column: 1, scope: !7)
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!20 = distinct !DISubprogram(name: "f4", linkageName: "_Z2f4v", scope: !1, file: !1, line: 8, type: !8, isLocal: false, isDefinition: true, scopeLine: 8, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)
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!21 = !DILocation(line: 8, column: 42, scope: !20)
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