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DebugInfo: llvm-dwarfdump support for gnu_pubnames section

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llvm-svn: 191050
This commit is contained in:
David Blaikie 2013-09-19 23:01:29 +00:00
parent 64a3fccd60
commit f60a2aeec3
6 changed files with 52 additions and 24 deletions
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1
include/llvm/DebugInfo/DIContext.h
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@ -109,6 +109,7 @@ enum DIDumpType {
DIDT_Loc,
DIDT_Ranges,
DIDT_Pubnames,
DIDT_GnuPubnames,
DIDT_Str,
DIDT_StrDwo,
DIDT_StrOffsetsDwo

17
include/llvm/Support/Dwarf.h
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@ -821,19 +821,18 @@ StringRef GDBIndexEntryLinkageString(GDBIndexEntryLinkage Linkage);
/// offset of the cu within the debug_info section stored in those 24 bits.
struct PubIndexEntryDescriptor {
GDBIndexEntryKind Kind;
GDBIndexEntryLinkage Static;
PubIndexEntryDescriptor(GDBIndexEntryKind Kind, GDBIndexEntryLinkage Static)
: Kind(Kind), Static(Static) {}
GDBIndexEntryLinkage Linkage;
PubIndexEntryDescriptor(GDBIndexEntryKind Kind, GDBIndexEntryLinkage Linkage)
: Kind(Kind), Linkage(Linkage) {}
/* implicit */ PubIndexEntryDescriptor(GDBIndexEntryKind Kind)
: Kind(Kind), Static(GIEL_EXTERNAL) {}
: Kind(Kind), Linkage(GIEL_EXTERNAL) {}
explicit PubIndexEntryDescriptor(uint8_t Value)
: Kind(static_cast<GDBIndexEntryKind>((Value & KIND_MASK) >>
KIND_OFFSET)),
Static(static_cast<GDBIndexEntryLinkage>((Value & LINKAGE_MASK) >>
LINKAGE_OFFSET)) {}
uint8_t toBits() {
return Kind << KIND_OFFSET | Static << LINKAGE_OFFSET;
}
Linkage(static_cast<GDBIndexEntryLinkage>((Value & LINKAGE_MASK) >>
LINKAGE_OFFSET)) {}
uint8_t toBits() { return Kind << KIND_OFFSET | Linkage << LINKAGE_OFFSET; }
private:
enum {
KIND_OFFSET = 4,

4
lib/CodeGen/AsmPrinter/DwarfDebug.cpp
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@ -2404,7 +2404,7 @@ void DwarfDebug::emitDebugPubNames(bool GnuStyle) {
dwarf::PubIndexEntryDescriptor Desc = computeIndexValue(TheCU, Entity);
Asm->OutStreamer.AddComment(
"Kind: " + dwarf::GDBIndexEntryKindString(Desc.Kind) + ", " +
dwarf::GDBIndexEntryLinkageString(Desc.Static));
dwarf::GDBIndexEntryLinkageString(Desc.Linkage));
Asm->EmitInt8(Desc.toBits());
}
@ -2466,7 +2466,7 @@ void DwarfDebug::emitDebugPubTypes(bool GnuStyle) {
dwarf::PubIndexEntryDescriptor Desc = computeIndexValue(TheCU, Entity);
Asm->OutStreamer.AddComment(
"Kind: " + dwarf::GDBIndexEntryKindString(Desc.Kind) + ", " +
dwarf::GDBIndexEntryLinkageString(Desc.Static));
dwarf::GDBIndexEntryLinkageString(Desc.Linkage));
Asm->EmitInt8(Desc.toBits());
}

22
lib/DebugInfo/DWARFContext.cpp
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@ -120,6 +120,27 @@ void DWARFContext::dump(raw_ostream &OS, DIDumpType DumpType) {
}
}
if (DumpType == DIDT_All || DumpType == DIDT_GnuPubnames) {
OS << "\n.debug_gnu_pubnames contents:\n";
DataExtractor pubNames(getGnuPubNamesSection(), isLittleEndian(), 0);
offset = 0;
OS << "Length: " << pubNames.getU32(&offset) << "\n";
OS << "Version: " << pubNames.getU16(&offset) << "\n";
OS << "Offset in .debug_info: " << pubNames.getU32(&offset) << "\n";
OS << "Size: " << pubNames.getU32(&offset) << "\n";
OS << "Offset Linkage Kind Name\n";
while (offset < getGnuPubNamesSection().size()) {
uint32_t dieRef = pubNames.getU32(&offset);
if (dieRef == 0)
break;
PubIndexEntryDescriptor desc(pubNames.getU8(&offset));
OS << format("0x%8.8x ", dieRef)
<< format("%-8s", dwarf::GDBIndexEntryLinkageString(desc.Linkage))
<< ' ' << dwarf::GDBIndexEntryKindString(desc.Kind) << ' '
<< pubNames.getCStr(&offset) << "\n";
}
}
if (DumpType == DIDT_All || DumpType == DIDT_AbbrevDwo) {
const DWARFDebugAbbrev *D = getDebugAbbrevDWO();
if (D) {
@ -566,6 +587,7 @@ DWARFContextInMemory::DWARFContextInMemory(object::ObjectFile *Obj) :
.Case("debug_str", &StringSection)
.Case("debug_ranges", &RangeSection)
.Case("debug_pubnames", &PubNamesSection)
.Case("debug_gnu_pubnames", &GnuPubNamesSection)
.Case("debug_info.dwo", &InfoDWOSection)
.Case("debug_abbrev.dwo", &AbbrevDWOSection)
.Case("debug_str.dwo", &StringDWOSection)

3
lib/DebugInfo/DWARFContext.h
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@ -125,6 +125,7 @@ public:
virtual StringRef getStringSection() = 0;
virtual StringRef getRangeSection() = 0;
virtual StringRef getPubNamesSection() = 0;
virtual StringRef getGnuPubNamesSection() = 0;
// Sections for DWARF5 split dwarf proposal.
virtual StringRef getInfoDWOSection() = 0;
@ -166,6 +167,7 @@ class DWARFContextInMemory : public DWARFContext {
StringRef StringSection;
StringRef RangeSection;
StringRef PubNamesSection;
StringRef GnuPubNamesSection;
// Sections for DWARF5 split dwarf proposal.
RelocAddrMap InfoDWORelocMap;
@ -195,6 +197,7 @@ public:
virtual StringRef getStringSection() { return StringSection; }
virtual StringRef getRangeSection() { return RangeSection; }
virtual StringRef getPubNamesSection() { return PubNamesSection; }
virtual StringRef getGnuPubNamesSection() { return GnuPubNamesSection; }
// Sections for DWARF5 split dwarf proposal.
virtual StringRef getInfoDWOSection() { return InfoDWOSection; }

29
test/DebugInfo/X86/gnu-public-names.ll
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@ -1,4 +1,5 @@
; RUN: llc -mtriple=x86_64-pc-linux-gnu -generate-gnu-dwarf-pub-sections -o - %s | FileCheck %s
; RUN: llc -mtriple=x86_64-pc-linux-gnu -generate-gnu-dwarf-pub-sections < %s | FileCheck -check-prefix=ASM %s
; RUN: llc -mtriple=x86_64-pc-linux-gnu -generate-gnu-dwarf-pub-sections -filetype=obj < %s | llvm-dwarfdump - | FileCheck %s
; ModuleID = 'dwarf-public-names.cpp'
;
; Generated from:
@ -33,18 +34,20 @@
; }
; CHECK: .byte 32 # Kind: VARIABLE, EXTERNAL
; CHECK-NEXT: .asciz "global_namespace_variable" # External Name
; CHECK: .byte 48 # Kind: FUNCTION, EXTERNAL
; CHECK-NEXT: .asciz "global_namespace_function" # External Name
; CHECK: .byte 176 # Kind: FUNCTION, STATIC
; CHECK-NEXT: .asciz "static_member_function" # External Name
; CHECK: .byte 32 # Kind: VARIABLE, EXTERNAL
; CHECK-NEXT: .asciz "global_variable" # External Name
; CHECK: .byte 48 # Kind: FUNCTION, EXTERNAL
; CHECK-NEXT: .asciz "global_function" # External Name
; CHECK: .byte 176 # Kind: FUNCTION, STATIC
; CHECK-NEXT: .asciz "member_function" # External Name
; ASM: .byte 32 # Kind: VARIABLE, EXTERNAL
; CHECK: .debug_gnu_pubnames contents:
; CHECK-NEXT: Length: 167
; CHECK-NEXT: Version: 2
; CHECK-NEXT: Offset in .debug_info: 0
; CHECK-NEXT: Size: 317
; CHECK-NEXT: Offset Linkage Kind Name
; CHECK-DAG: 0x00000094 EXTERNAL VARIABLE global_namespace_variable
; CHECK-DAG: 0x000000a3 EXTERNAL FUNCTION global_namespace_function
; CHECK-DAG: 0x000000e8 STATIC FUNCTION static_member_function
; CHECK-DAG: 0x0000007c EXTERNAL VARIABLE global_variable
; CHECK-DAG: 0x000000ff EXTERNAL FUNCTION global_function
; CHECK-DAG: 0x000000be STATIC FUNCTION member_function
%struct.C = type { i8 }