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Add DWARF debug info support for C++11 inline namespaces.

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This implements the DWARF 5 DW_AT_export_symbols feature:
http://dwarfstd.org/ShowIssue.php?issue=141212.1

<rdar://problem/18616046>

llvm-svn: 285959
This commit is contained in:
Adrian Prantl 2016-11-03 19:42:02 +00:00
parent 824adf1015
commit 858b29de65
16 changed files with 135 additions and 43 deletions
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14
include/llvm/Bitcode/LLVMBitCodes.h
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@ -239,13 +239,13 @@ enum MetadataCodes {
METADATA_SUBPROGRAM = 21, // [distinct, ...]
METADATA_LEXICAL_BLOCK = 22, // [distinct, scope, file, line, column]
METADATA_LEXICAL_BLOCK_FILE = 23, //[distinct, scope, file, discriminator]
METADATA_NAMESPACE = 24, // [distinct, scope, file, name, line]
METADATA_TEMPLATE_TYPE = 25, // [distinct, scope, name, type, ...]
METADATA_TEMPLATE_VALUE = 26, // [distinct, scope, name, type, value, ...]
METADATA_GLOBAL_VAR = 27, // [distinct, ...]
METADATA_LOCAL_VAR = 28, // [distinct, ...]
METADATA_EXPRESSION = 29, // [distinct, n x element]
METADATA_OBJC_PROPERTY = 30, // [distinct, name, file, line, ...]
METADATA_NAMESPACE = 24, // [distinct, scope, file, name, line, exportSymbols]
METADATA_TEMPLATE_TYPE = 25, // [distinct, scope, name, type, ...]
METADATA_TEMPLATE_VALUE = 26, // [distinct, scope, name, type, value, ...]
METADATA_GLOBAL_VAR = 27, // [distinct, ...]
METADATA_LOCAL_VAR = 28, // [distinct, ...]
METADATA_EXPRESSION = 29, // [distinct, n x element]
METADATA_OBJC_PROPERTY = 30, // [distinct, name, file, line, ...]
METADATA_IMPORTED_ENTITY = 31, // [distinct, tag, scope, entity, line, name]
METADATA_MODULE = 32, // [distinct, scope, name, ...]
METADATA_MACRO = 33, // [distinct, macinfo, line, name, value]

3
include/llvm/IR/DIBuilder.h
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@ -598,8 +598,9 @@ namespace llvm {
/// \param Name Name of this namespace
/// \param File Source file
/// \param LineNo Line number
/// \param ExportSymbols True for C++ inline namespaces.
DINamespace *createNameSpace(DIScope *Scope, StringRef Name, DIFile *File,
unsigned LineNo);
unsigned LineNo, bool ExportSymbols);
/// This creates new descriptor for a module with the specified
/// parent scope.

27
include/llvm/IR/DebugInfoMetadata.h
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@ -1636,40 +1636,45 @@ class DINamespace : public DIScope {
friend class MDNode;
unsigned Line;
unsigned ExportSymbols : 1;
DINamespace(LLVMContext &Context, StorageType Storage, unsigned Line,
ArrayRef<Metadata *> Ops)
bool ExportSymbols, ArrayRef<Metadata *> Ops)
: DIScope(Context, DINamespaceKind, Storage, dwarf::DW_TAG_namespace,
Ops),
Line(Line) {}
Line(Line), ExportSymbols(ExportSymbols) {}
~DINamespace() = default;
static DINamespace *getImpl(LLVMContext &Context, DIScope *Scope,
DIFile *File, StringRef Name, unsigned Line,
StorageType Storage, bool ShouldCreate = true) {
bool ExportSymbols, StorageType Storage,
bool ShouldCreate = true) {
return getImpl(Context, Scope, File, getCanonicalMDString(Context, Name),
Line, Storage, ShouldCreate);
Line, ExportSymbols, Storage, ShouldCreate);
}
static DINamespace *getImpl(LLVMContext &Context, Metadata *Scope,
Metadata *File, MDString *Name, unsigned Line,
StorageType Storage, bool ShouldCreate = true);
bool ExportSymbols, StorageType Storage,
bool ShouldCreate = true);
TempDINamespace cloneImpl() const {
return getTemporary(getContext(), getScope(), getFile(), getName(),
getLine());
getLine(), getExportSymbols());
}
public:
DEFINE_MDNODE_GET(DINamespace, (DIScope * Scope, DIFile *File, StringRef Name,
unsigned Line),
(Scope, File, Name, Line))
DEFINE_MDNODE_GET(DINamespace, (Metadata * Scope, Metadata *File,
MDString *Name, unsigned Line),
(Scope, File, Name, Line))
unsigned Line, bool ExportSymbols),
(Scope, File, Name, Line, ExportSymbols))
DEFINE_MDNODE_GET(DINamespace,
(Metadata * Scope, Metadata *File, MDString *Name,
unsigned Line, bool ExportSymbols),
(Scope, File, Name, Line, ExportSymbols))
TempDINamespace clone() const { return cloneImpl(); }
unsigned getLine() const { return Line; }
bool getExportSymbols() const { return ExportSymbols; }
DIScope *getScope() const { return cast_or_null<DIScope>(getRawScope()); }
StringRef getName() const { return getStringOperand(2); }

5
lib/AsmParser/LLParser.cpp
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@ -4092,12 +4092,13 @@ bool LLParser::ParseDINamespace(MDNode *&Result, bool IsDistinct) {
REQUIRED(scope, MDField, ); \
OPTIONAL(file, MDField, ); \
OPTIONAL(name, MDStringField, ); \
OPTIONAL(line, LineField, );
OPTIONAL(line, LineField, ); \
OPTIONAL(exportSymbols, MDBoolField, );
PARSE_MD_FIELDS();
#undef VISIT_MD_FIELDS
Result = GET_OR_DISTINCT(DINamespace,
(Context, scope.Val, file.Val, name.Val, line.Val));
(Context, scope.Val, file.Val, name.Val, line.Val, exportSymbols.Val));
return false;
}

10
lib/Bitcode/Reader/BitcodeReader.cpp
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@ -2628,11 +2628,13 @@ std::error_code BitcodeReader::parseMetadata(bool ModuleLevel) {
if (Record.size() != 5)
return error("Invalid record");
IsDistinct = Record[0];
IsDistinct = Record[0] & 1;
bool ExportSymbols = Record[0] & 2;
MetadataList.assignValue(
GET_OR_DISTINCT(DINamespace, (Context, getMDOrNull(Record[1]),
getMDOrNull(Record[2]),
getMDString(Record[3]), Record[4])),
GET_OR_DISTINCT(DINamespace,
(Context, getMDOrNull(Record[1]),
getMDOrNull(Record[2]), getMDString(Record[3]),
Record[4], ExportSymbols)),
NextMetadataNo++);
break;
}

2
lib/Bitcode/Writer/BitcodeWriter.cpp
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@ -1627,7 +1627,7 @@ void ModuleBitcodeWriter::writeDILexicalBlockFile(
void ModuleBitcodeWriter::writeDINamespace(const DINamespace *N,
SmallVectorImpl<uint64_t> &Record,
unsigned Abbrev) {
Record.push_back(N->isDistinct());
Record.push_back(N->isDistinct() | N->getExportSymbols() << 1);
Record.push_back(VE.getMetadataOrNullID(N->getScope()));
Record.push_back(VE.getMetadataOrNullID(N->getFile()));
Record.push_back(VE.getMetadataOrNullID(N->getRawName()));

2
lib/CodeGen/AsmPrinter/DwarfUnit.cpp
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@ -1083,6 +1083,8 @@ DIE *DwarfUnit::getOrCreateNameSpace(const DINamespace *NS) {
DD->addAccelNamespace(Name, NDie);
addGlobalName(Name, NDie, NS->getScope());
addSourceLine(NDie, NS);
if (NS->getExportSymbols())
addFlag(NDie, dwarf::DW_AT_export_symbols);
return &NDie;
}

1
lib/IR/AsmWriter.cpp
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@ -1740,6 +1740,7 @@ static void writeDINamespace(raw_ostream &Out, const DINamespace *N,
Printer.printMetadata("scope", N->getRawScope(), /* ShouldSkipNull */ false);
Printer.printMetadata("file", N->getRawFile());
Printer.printInt("line", N->getLine());
Printer.printBool("exportSymbols", N->getExportSymbols(), false);
Out << ")";
}

5
lib/IR/DIBuilder.cpp
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@ -685,9 +685,10 @@ DISubprogram *DIBuilder::createMethod(DIScope *Context, StringRef Name,
}
DINamespace *DIBuilder::createNameSpace(DIScope *Scope, StringRef Name,
DIFile *File, unsigned LineNo) {
DIFile *File, unsigned LineNo,
bool ExportSymbols) {
return DINamespace::get(VMContext, getNonCompileUnitScope(Scope), File, Name,
LineNo);
LineNo, ExportSymbols);
}
DIModule *DIBuilder::createModule(DIScope *Scope, StringRef Name,

7
lib/IR/DebugInfoMetadata.cpp
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@ -471,11 +471,12 @@ DILexicalBlockFile *DILexicalBlockFile::getImpl(LLVMContext &Context,
DINamespace *DINamespace::getImpl(LLVMContext &Context, Metadata *Scope,
Metadata *File, MDString *Name, unsigned Line,
StorageType Storage, bool ShouldCreate) {
bool ExportSymbols, StorageType Storage,
bool ShouldCreate) {
assert(isCanonical(Name) && "Expected canonical MDString");
DEFINE_GETIMPL_LOOKUP(DINamespace, (Scope, File, Name, Line));
DEFINE_GETIMPL_LOOKUP(DINamespace, (Scope, File, Name, Line, ExportSymbols));
Metadata *Ops[] = {File, Scope, Name};
DEFINE_GETIMPL_STORE(DINamespace, (Line), Ops);
DEFINE_GETIMPL_STORE(DINamespace, (Line, ExportSymbols), Ops);
}
DIModule *DIModule::getImpl(LLVMContext &Context, Metadata *Scope,

12
lib/IR/LLVMContextImpl.h
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@ -674,16 +674,20 @@ template <> struct MDNodeKeyImpl<DINamespace> {
Metadata *File;
MDString *Name;
unsigned Line;
bool ExportSymbols;
MDNodeKeyImpl(Metadata *Scope, Metadata *File, MDString *Name, unsigned Line)
: Scope(Scope), File(File), Name(Name), Line(Line) {}
MDNodeKeyImpl(Metadata *Scope, Metadata *File, MDString *Name, unsigned Line,
bool ExportSymbols)
: Scope(Scope), File(File), Name(Name), Line(Line),
ExportSymbols(ExportSymbols) {}
MDNodeKeyImpl(const DINamespace *N)
: Scope(N->getRawScope()), File(N->getRawFile()), Name(N->getRawName()),
Line(N->getLine()) {}
Line(N->getLine()), ExportSymbols(N->getExportSymbols()) {}
bool isKeyOf(const DINamespace *RHS) const {
return Scope == RHS->getRawScope() && File == RHS->getRawFile() &&
Name == RHS->getRawName() && Line == RHS->getLine();
Name == RHS->getRawName() && Line == RHS->getLine() &&
ExportSymbols == RHS->getExportSymbols();
}
unsigned getHashValue() const {
return hash_combine(Scope, File, Name, Line);

7
test/Assembler/dinamespace.ll
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@ -1,8 +1,8 @@
; RUN: llvm-as < %s | llvm-dis | llvm-as | llvm-dis | FileCheck %s
; RUN: verify-uselistorder %s
; CHECK: !named = !{!0, !1, !2, !3, !4, !4}
!named = !{!0, !1, !2, !3, !4, !5}
; CHECK: !named = !{!0, !1, !2, !3, !4, !4, !4, !5}
!named = !{!0, !1, !2, !3, !4, !5, !6, !7}
!0 = !DIFile(filename: "file.cpp", directory: "/path/to/dir")
!1 = distinct !{}
@ -14,3 +14,6 @@
; CHECK: !4 = !DINamespace(scope: !0)
!4 = !DINamespace(name: "", scope: !0, file: null, line: 0)
!5 = !DINamespace(scope: !0)
!6 = !DINamespace(scope: !0, exportSymbols: false)
; CHECK: !5 = !DINamespace(scope: !0, exportSymbols: true)
!7 = !DINamespace(name: "", scope: !0, exportSymbols: true)

23
test/Bitcode/DINamespace.ll Normal file
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@ -0,0 +1,23 @@
; RUN: llvm-dis %s.bc -o - | FileCheck %s
target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-apple-macosx10.12.0"
@_ZN1N1iE = global i32 0, align 4, !dbg !0
!llvm.dbg.cu = !{!4}
!llvm.module.flags = !{!7, !8, !9}
!llvm.ident = !{!10}
!0 = distinct !DIGlobalVariable(name: "i", linkageName: "_ZN1N1iE", scope: !1, file: !2, line: 2, type: !3, isLocal: false, isDefinition: true)
; Test bitcode upgrade for DINamespace without an exportSymbols field.
; CHECK: !DINamespace(name: "N", scope: null, file: !{{[0-9]+}}, line: 1)
!1 = !DINamespace(name: "N", scope: null, file: !2, line: 1)
!2 = !DIFile(filename: "dinamespace.cpp", directory: "/")
!3 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
!4 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !2, producer: "clang version 4.0.0 (trunk 283228) (llvm/trunk 283225)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !5, globals: !6)
!5 = !{}
!6 = !{!0}
!7 = !{i32 2, !"Dwarf Version", i32 4}
!8 = !{i32 2, !"Debug Info Version", i32 3}
!9 = !{i32 1, !"PIC Level", i32 2}
!10 = !{!"clang version 4.0.0 (trunk 283228) (llvm/trunk 283225)"}

BIN
test/Bitcode/DINamespace.ll.bc Normal file
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Binary file not shown.

40
test/DebugInfo/X86/inline-namespace.ll Normal file
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@ -0,0 +1,40 @@
; RUN: %llc_dwarf %s -o - -filetype=obj | llvm-dwarfdump -debug-dump=info - | FileCheck %s
; Generated from:
; namespace normal { inline namespace inlined { int i; } }
; Check that an inline namespace is emitted with DW_AT_export_symbols
; CHECK: DW_TAG_namespace
; CHECK-NEXT: DW_AT_name {{.*}} "normal"
; CHECK-NOT: DW_AT_export_symbols
; CHECK-NOT: NULL
; CHECK: DW_TAG_namespace
; CHECK-NEXT: DW_AT_name {{.*}} "inlined"
; CHECK-NOT: DW_TAG
; CHECK-NOT: NULL
; CHECK: DW_AT_export_symbols [DW_FORM_flag_present] (true)
; CHECK-NOT: DW_TAG
; CHECK: DW_TAG_variable
; CHECK-NEXT: DW_AT_name {{.*}} "i"
source_filename = "namespace.cpp"
target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-apple-macosx10.12.0"
@_ZN6normal7inlined1iE = global i32 0, align 4, !dbg !0
!llvm.dbg.cu = !{!5}
!llvm.module.flags = !{!8, !9, !10}
!llvm.ident = !{!11}
!0 = distinct !DIGlobalVariable(name: "i", linkageName: "_ZN6normal7inlined1iE", scope: !1, file: !2, line: 1, type: !4, isLocal: false, isDefinition: true)
!1 = !DINamespace(name: "inlined", scope: !3, file: !2, line: 1, exportSymbols: true)
!2 = !DIFile(filename: "namespace.cpp", directory: "/")
!3 = !DINamespace(name: "normal", scope: null, file: !2, line: 1)
!4 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!5 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !2, producer: "clang version 4.0.0 (trunk 285825) (llvm/trunk 285822)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !6, globals: !7)
!6 = !{}
!7 = !{!0}
!8 = !{i32 2, !"Dwarf Version", i32 5}
!9 = !{i32 2, !"Debug Info Version", i32 3}
!10 = !{i32 1, !"PIC Level", i32 2}
!11 = !{!"clang version 4.0.0 (trunk 285825) (llvm/trunk 285822)"}

20
unittests/IR/MetadataTest.cpp
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@ -1706,20 +1706,28 @@ TEST_F(DINamespaceTest, get) {
DIFile *File = getFile();
StringRef Name = "namespace";
unsigned Line = 5;
bool ExportSymbols = true;
auto *N = DINamespace::get(Context, Scope, File, Name, Line);
auto *N = DINamespace::get(Context, Scope, File, Name, Line, ExportSymbols);
EXPECT_EQ(dwarf::DW_TAG_namespace, N->getTag());
EXPECT_EQ(Scope, N->getScope());
EXPECT_EQ(File, N->getFile());
EXPECT_EQ(Name, N->getName());
EXPECT_EQ(Line, N->getLine());
EXPECT_EQ(N, DINamespace::get(Context, Scope, File, Name, Line));
EXPECT_EQ(N,
DINamespace::get(Context, Scope, File, Name, Line, ExportSymbols));
EXPECT_NE(N, DINamespace::get(Context, getFile(), File, Name, Line));
EXPECT_NE(N, DINamespace::get(Context, Scope, getFile(), Name, Line));
EXPECT_NE(N, DINamespace::get(Context, Scope, File, "other", Line));
EXPECT_NE(N, DINamespace::get(Context, Scope, File, Name, Line + 1));
EXPECT_NE(N,
DINamespace::get(Context, getFile(), File, Name, Line, ExportSymbols));
EXPECT_NE(N,
DINamespace::get(Context, Scope, getFile(), Name, Line, ExportSymbols));
EXPECT_NE(N,
DINamespace::get(Context, Scope, File, "other", Line, ExportSymbols));
EXPECT_NE(N,
DINamespace::get(Context, Scope, File, Name, Line + 1, ExportSymbols));
EXPECT_NE(N,
DINamespace::get(Context, Scope, File, Name, Line, !ExportSymbols));
TempDINamespace Temp = N->clone();
EXPECT_EQ(N, MDNode::replaceWithUniqued(std::move(Temp)));