index e98df8cd47ef319be2547b9a6141bc19ce364d31..a588c46718bbcae1e0fe1e71d532d173bb14bb1c 100644 (file)
#include "DwarfDebug.h"
#include "DIE.h"
#include "DIEHash.h"
-#include "DwarfAccelTable.h"
#include "DwarfUnit.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/Statistic.h"
return Ty;
}
+static LLVM_CONSTEXPR DwarfAccelTable::Atom TypeAtoms[] = {
+ DwarfAccelTable::Atom(dwarf::DW_ATOM_die_offset, dwarf::DW_FORM_data4),
+ DwarfAccelTable::Atom(dwarf::DW_ATOM_die_tag, dwarf::DW_FORM_data2),
+ DwarfAccelTable::Atom(dwarf::DW_ATOM_type_flags, dwarf::DW_FORM_data1)};
+
DwarfDebug::DwarfDebug(AsmPrinter *A, Module *M)
- : Asm(A), MMI(Asm->MMI), FirstCU(0), PrevLabel(NULL), GlobalRangeCount(0),
- InfoHolder(A, "info_string", DIEValueAllocator),
+ : Asm(A), MMI(Asm->MMI), FirstCU(nullptr), PrevLabel(nullptr),
+ GlobalRangeCount(0), InfoHolder(A, "info_string", DIEValueAllocator),
UsedNonDefaultText(false),
- SkeletonHolder(A, "skel_string", DIEValueAllocator) {
-
- DwarfInfoSectionSym = DwarfAbbrevSectionSym = DwarfStrSectionSym = 0;
- DwarfDebugRangeSectionSym = DwarfDebugLocSectionSym = DwarfLineSectionSym = 0;
- DwarfAddrSectionSym = 0;
- DwarfAbbrevDWOSectionSym = DwarfStrDWOSectionSym = 0;
- FunctionBeginSym = FunctionEndSym = 0;
- CurFn = 0;
- CurMI = 0;
+ SkeletonHolder(A, "skel_string", DIEValueAllocator),
+ AccelNames(DwarfAccelTable::Atom(dwarf::DW_ATOM_die_offset,
+ dwarf::DW_FORM_data4)),
+ AccelObjC(DwarfAccelTable::Atom(dwarf::DW_ATOM_die_offset,
+ dwarf::DW_FORM_data4)),
+ AccelNamespace(DwarfAccelTable::Atom(dwarf::DW_ATOM_die_offset,
+ dwarf::DW_FORM_data4)),
+ AccelTypes(TypeAtoms) {
+
+ DwarfInfoSectionSym = DwarfAbbrevSectionSym = DwarfStrSectionSym = nullptr;
+ DwarfDebugRangeSectionSym = DwarfDebugLocSectionSym = nullptr;
+ DwarfLineSectionSym = nullptr;
+ DwarfAddrSectionSym = nullptr;
+ DwarfAbbrevDWOSectionSym = DwarfStrDWOSectionSym = nullptr;
+ FunctionBeginSym = FunctionEndSym = nullptr;
+ CurFn = nullptr;
+ CurMI = nullptr;
// Turn on accelerator tables for Darwin by default, pubnames by
// default for non-Darwin, and handle split dwarf.
// Switch to the specified MCSection and emit an assembler
// temporary label to it if SymbolStem is specified.
static MCSymbol *emitSectionSym(AsmPrinter *Asm, const MCSection *Section,
- const char *SymbolStem = 0) {
+ const char *SymbolStem = nullptr) {
Asm->OutStreamer.SwitchSection(Section);
if (!SymbolStem)
- return 0;
+ return nullptr;
MCSymbol *TmpSym = Asm->GetTempSymbol(SymbolStem);
Asm->OutStreamer.EmitLabel(TmpSym);
// TODO: Determine whether or not we should add names for programs
// that do not have a DW_AT_name or DW_AT_linkage_name field - this
// is only slightly different than the lookup of non-standard ObjC names.
-static void addSubprogramNames(DwarfUnit &TheU, DISubprogram SP, DIE *Die) {
+void DwarfDebug::addSubprogramNames(DISubprogram SP, DIE &Die) {
if (!SP.isDefinition())
return;
- TheU.addAccelName(SP.getName(), Die);
+ addAccelName(SP.getName(), Die);
// If the linkage name is different than the name, go ahead and output
// that as well into the name table.
if (SP.getLinkageName() != "" && SP.getName() != SP.getLinkageName())
- TheU.addAccelName(SP.getLinkageName(), Die);
+ addAccelName(SP.getLinkageName(), Die);
// If this is an Objective-C selector name add it to the ObjC accelerator
// too.
if (isObjCClass(SP.getName())) {
StringRef Class, Category;
getObjCClassCategory(SP.getName(), Class, Category);
- TheU.addAccelObjC(Class, Die);
+ addAccelObjC(Class, Die);
if (Category != "")
- TheU.addAccelObjC(Category, Die);
+ addAccelObjC(Category, Die);
// Also add the base method name to the name table.
- TheU.addAccelName(getObjCMethodName(SP.getName()), Die);
+ addAccelName(getObjCMethodName(SP.getName()), Die);
}
}
// concrete DIE twice.
if (DIE *AbsSPDIE = AbstractSPDies.lookup(SP)) {
// Pick up abstract subprogram DIE.
- SPDie = SPCU.createAndAddDIE(dwarf::DW_TAG_subprogram, *SPCU.getUnitDie());
- SPCU.addDIEEntry(SPDie, dwarf::DW_AT_abstract_origin, AbsSPDIE);
+ SPDie = &SPCU.createAndAddDIE(dwarf::DW_TAG_subprogram, SPCU.getUnitDie());
+ SPCU.addDIEEntry(*SPDie, dwarf::DW_AT_abstract_origin, *AbsSPDIE);
} else {
DISubprogram SPDecl = SP.getFunctionDeclaration();
if (!SPDecl.isSubprogram()) {
DIScope SPContext = resolve(SP.getContext());
if (SP.isDefinition() && !SPContext.isCompileUnit() &&
!SPContext.isFile() && !isSubprogramContext(SPContext)) {
- SPCU.addFlag(SPDie, dwarf::DW_AT_declaration);
+ SPCU.addFlag(*SPDie, dwarf::DW_AT_declaration);
// Add arguments.
DICompositeType SPTy = SP.getType();
SPCU.constructSubprogramArguments(*SPDie, Args);
DIE *SPDeclDie = SPDie;
SPDie =
- SPCU.createAndAddDIE(dwarf::DW_TAG_subprogram, *SPCU.getUnitDie());
- SPCU.addDIEEntry(SPDie, dwarf::DW_AT_specification, SPDeclDie);
+ &SPCU.createAndAddDIE(dwarf::DW_TAG_subprogram, SPCU.getUnitDie());
+ SPCU.addDIEEntry(*SPDie, dwarf::DW_AT_specification, *SPDeclDie);
}
}
}
- attachLowHighPC(SPCU, SPDie, FunctionBeginSym, FunctionEndSym);
+ attachLowHighPC(SPCU, *SPDie, FunctionBeginSym, FunctionEndSym);
const TargetRegisterInfo *RI = Asm->TM.getRegisterInfo();
MachineLocation Location(RI->getFrameRegister(*Asm->MF));
- SPCU.addAddress(SPDie, dwarf::DW_AT_frame_base, Location);
+ SPCU.addAddress(*SPDie, dwarf::DW_AT_frame_base, Location);
// Add name to the name table, we do this here because we're guaranteed
// to have concrete versions of our DW_TAG_subprogram nodes.
- addSubprogramNames(SPCU, SP, SPDie);
+ addSubprogramNames(SP, *SPDie);
return SPDie;
}
return !End;
}
-static void addSectionLabel(AsmPrinter &Asm, DwarfUnit &U, DIE *D,
+static void addSectionLabel(AsmPrinter &Asm, DwarfUnit &U, DIE &D,
dwarf::Attribute A, const MCSymbol *L,
const MCSymbol *Sec) {
if (Asm.MAI->doesDwarfUseRelocationsAcrossSections())
U.addSectionDelta(D, A, L, Sec);
}
-void DwarfDebug::addScopeRangeList(DwarfCompileUnit &TheCU, DIE *ScopeDIE,
+void DwarfDebug::addScopeRangeList(DwarfCompileUnit &TheCU, DIE &ScopeDIE,
const SmallVectorImpl<InsnRange> &Range) {
// Emit offset in .debug_range as a relocatable label. emitDIE will handle
// emitting it appropriately.
DIE *DwarfDebug::constructLexicalScopeDIE(DwarfCompileUnit &TheCU,
LexicalScope *Scope) {
if (isLexicalScopeDIENull(Scope))
- return 0;
+ return nullptr;
DIE *ScopeDIE = new DIE(dwarf::DW_TAG_lexical_block);
if (Scope->isAbstractScope())
// If we have multiple ranges, emit them into the range section.
if (ScopeRanges.size() > 1) {
- addScopeRangeList(TheCU, ScopeDIE, ScopeRanges);
+ addScopeRangeList(TheCU, *ScopeDIE, ScopeRanges);
return ScopeDIE;
}
assert(Start->isDefined() && "Invalid starting label for an inlined scope!");
assert(End->isDefined() && "Invalid end label for an inlined scope!");
- attachLowHighPC(TheCU, ScopeDIE, Start, End);
+ attachLowHighPC(TheCU, *ScopeDIE, Start, End);
return ScopeDIE;
}
"LexicalScope does not have instruction markers!");
if (!Scope->getScopeNode())
- return NULL;
+ return nullptr;
DIScope DS(Scope->getScopeNode());
DISubprogram InlinedSP = getDISubprogram(DS);
DIE *OriginDIE = TheCU.getDIE(InlinedSP);
if (!OriginDIE) {
DEBUG(dbgs() << "Unable to find original DIE for an inlined subprogram.");
- return NULL;
+ return nullptr;
}
DIE *ScopeDIE = new DIE(dwarf::DW_TAG_inlined_subroutine);
- TheCU.addDIEEntry(ScopeDIE, dwarf::DW_AT_abstract_origin, OriginDIE);
+ TheCU.addDIEEntry(*ScopeDIE, dwarf::DW_AT_abstract_origin, *OriginDIE);
// If we have multiple ranges, emit them into the range section.
if (ScopeRanges.size() > 1)
- addScopeRangeList(TheCU, ScopeDIE, ScopeRanges);
+ addScopeRangeList(TheCU, *ScopeDIE, ScopeRanges);
else {
SmallVectorImpl<InsnRange>::const_iterator RI = ScopeRanges.begin();
MCSymbol *StartLabel = getLabelBeforeInsn(RI->first);
MCSymbol *EndLabel = getLabelAfterInsn(RI->second);
- if (StartLabel == 0 || EndLabel == 0)
+ if (!StartLabel || !EndLabel)
llvm_unreachable("Unexpected Start and End labels for an inlined scope!");
assert(StartLabel->isDefined() &&
"Invalid starting label for an inlined scope!");
assert(EndLabel->isDefined() && "Invalid end label for an inlined scope!");
- attachLowHighPC(TheCU, ScopeDIE, StartLabel, EndLabel);
+ attachLowHighPC(TheCU, *ScopeDIE, StartLabel, EndLabel);
}
InlinedSubprogramDIEs.insert(OriginDIE);
// Add the call site information to the DIE.
DILocation DL(Scope->getInlinedAt());
- TheCU.addUInt(ScopeDIE, dwarf::DW_AT_call_file, None,
+ TheCU.addUInt(*ScopeDIE, dwarf::DW_AT_call_file, None,
TheCU.getOrCreateSourceID(DL.getFilename(), DL.getDirectory()));
- TheCU.addUInt(ScopeDIE, dwarf::DW_AT_call_line, None, DL.getLineNumber());
+ TheCU.addUInt(*ScopeDIE, dwarf::DW_AT_call_line, None, DL.getLineNumber());
// Add name to the name table, we do this here because we're guaranteed
// to have concrete versions of our DW_TAG_inlined_subprogram nodes.
- addSubprogramNames(TheCU, InlinedSP, ScopeDIE);
+ addSubprogramNames(InlinedSP, *ScopeDIE);
return ScopeDIE;
}
-DIE *DwarfDebug::createScopeChildrenDIE(DwarfCompileUnit &TheCU,
- LexicalScope *Scope,
- SmallVectorImpl<DIE *> &Children) {
- DIE *ObjectPointer = NULL;
+DIE *DwarfDebug::createScopeChildrenDIE(
+ DwarfCompileUnit &TheCU, LexicalScope *Scope,
+ SmallVectorImpl<std::unique_ptr<DIE>> &Children) {
+ DIE *ObjectPointer = nullptr;
// Collect arguments for current function.
if (LScopes.isCurrentFunctionScope(Scope)) {
for (DbgVariable *ArgDV : CurrentFnArguments)
- if (ArgDV)
- if (DIE *Arg =
- TheCU.constructVariableDIE(*ArgDV, Scope->isAbstractScope())) {
- Children.push_back(Arg);
- if (ArgDV->isObjectPointer())
- ObjectPointer = Arg;
- }
+ if (ArgDV) {
+ Children.push_back(
+ TheCU.constructVariableDIE(*ArgDV, Scope->isAbstractScope()));
+ if (ArgDV->isObjectPointer())
+ ObjectPointer = Children.back().get();
+ }
// If this is a variadic function, add an unspecified parameter.
DISubprogram SP(Scope->getScopeNode());
DIArray FnArgs = SP.getType().getTypeArray();
if (FnArgs.getElement(FnArgs.getNumElements() - 1)
.isUnspecifiedParameter()) {
- DIE *Ellipsis = new DIE(dwarf::DW_TAG_unspecified_parameters);
- Children.push_back(Ellipsis);
+ Children.push_back(
+ make_unique<DIE>(dwarf::DW_TAG_unspecified_parameters));
}
}
// Collect lexical scope children first.
- for (DbgVariable *DV : ScopeVariables.lookup(Scope))
- if (DIE *Variable =
- TheCU.constructVariableDIE(*DV, Scope->isAbstractScope())) {
- Children.push_back(Variable);
- if (DV->isObjectPointer())
- ObjectPointer = Variable;
- }
+ for (DbgVariable *DV : ScopeVariables.lookup(Scope)) {
+ Children.push_back(
+ TheCU.constructVariableDIE(*DV, Scope->isAbstractScope()));
+ if (DV->isObjectPointer())
+ ObjectPointer = Children.back().get();
+ }
for (LexicalScope *LS : Scope->getChildren())
if (DIE *Nested = constructScopeDIE(TheCU, LS))
- Children.push_back(Nested);
+ Children.push_back(std::unique_ptr<DIE>(Nested));
return ObjectPointer;
}
DIE *DwarfDebug::constructScopeDIE(DwarfCompileUnit &TheCU,
LexicalScope *Scope) {
if (!Scope || !Scope->getScopeNode())
- return NULL;
+ return nullptr;
DIScope DS(Scope->getScopeNode());
- SmallVector<DIE *, 8> Children;
- DIE *ObjectPointer = NULL;
+ SmallVector<std::unique_ptr<DIE>, 8> Children;
+ DIE *ObjectPointer = nullptr;
bool ChildrenCreated = false;
// We try to create the scope DIE first, then the children DIEs. This will
// avoid creating un-used children then removing them later when we find out
// the scope DIE is null.
- DIE *ScopeDIE = NULL;
+ DIE *ScopeDIE = nullptr;
if (Scope->getInlinedAt())
ScopeDIE = constructInlinedScopeDIE(TheCU, Scope);
else if (DS.isSubprogram()) {
} else {
// Early exit when we know the scope DIE is going to be null.
if (isLexicalScopeDIENull(Scope))
- return NULL;
+ return nullptr;
// We create children here when we know the scope DIE is not going to be
// null and the children will be added to the scope DIE.
std::equal_range(
ScopesWithImportedEntities.begin(),
ScopesWithImportedEntities.end(),
- std::pair<const MDNode *, const MDNode *>(DS, (const MDNode *)0),
+ std::pair<const MDNode *, const MDNode *>(DS, nullptr),
less_first());
if (Children.empty() && Range.first == Range.second)
- return NULL;
+ return nullptr;
ScopeDIE = constructLexicalScopeDIE(TheCU, Scope);
assert(ScopeDIE && "Scope DIE should not be null.");
for (ImportedEntityMap::const_iterator i = Range.first; i != Range.second;
if (!ScopeDIE) {
assert(Children.empty() &&
"We create children only when the scope DIE is not null.");
- return NULL;
+ return nullptr;
}
if (!ChildrenCreated)
// We create children when the scope DIE is not null.
ObjectPointer = createScopeChildrenDIE(TheCU, Scope, Children);
// Add children
- for (DIE *I : Children)
- ScopeDIE->addChild(I);
+ for (auto &I : Children)
+ ScopeDIE->addChild(std::move(I));
- if (DS.isSubprogram() && ObjectPointer != NULL)
- TheCU.addDIEEntry(ScopeDIE, dwarf::DW_AT_object_pointer, ObjectPointer);
+ if (DS.isSubprogram() && ObjectPointer != nullptr)
+ TheCU.addDIEEntry(*ScopeDIE, dwarf::DW_AT_object_pointer, *ObjectPointer);
return ScopeDIE;
}
-void DwarfDebug::addGnuPubAttributes(DwarfUnit &U, DIE *D) const {
+void DwarfDebug::addGnuPubAttributes(DwarfUnit &U, DIE &D) const {
if (!GenerateGnuPubSections)
return;
@@ -634,10 +644,10 @@ DwarfCompileUnit &DwarfDebug::constructDwarfCompileUnit(DICompileUnit DIUnit) {
Asm->OutStreamer.getContext().setMCLineTableCompilationDir(
NewCU.getUniqueID(), CompilationDir);
- NewCU.addString(Die, dwarf::DW_AT_producer, DIUnit.getProducer());
- NewCU.addUInt(Die, dwarf::DW_AT_language, dwarf::DW_FORM_data2,
+ NewCU.addString(*Die, dwarf::DW_AT_producer, DIUnit.getProducer());
+ NewCU.addUInt(*Die, dwarf::DW_AT_language, dwarf::DW_FORM_data2,
DIUnit.getLanguage());
- NewCU.addString(Die, dwarf::DW_AT_name, FN);
+ NewCU.addString(*Die, dwarf::DW_AT_name, FN);
if (!useSplitDwarf()) {
NewCU.initStmtList(DwarfLineSectionSym);
@@ -645,20 +655,20 @@ DwarfCompileUnit &DwarfDebug::constructDwarfCompileUnit(DICompileUnit DIUnit) {
// If we're using split dwarf the compilation dir is going to be in the
// skeleton CU and so we don't need to duplicate it here.
if (!CompilationDir.empty())
- NewCU.addString(Die, dwarf::DW_AT_comp_dir, CompilationDir);
+ NewCU.addString(*Die, dwarf::DW_AT_comp_dir, CompilationDir);
- addGnuPubAttributes(NewCU, Die);
+ addGnuPubAttributes(NewCU, *Die);
}
if (DIUnit.isOptimized())
- NewCU.addFlag(Die, dwarf::DW_AT_APPLE_optimized);
+ NewCU.addFlag(*Die, dwarf::DW_AT_APPLE_optimized);
StringRef Flags = DIUnit.getFlags();
if (!Flags.empty())
- NewCU.addString(Die, dwarf::DW_AT_APPLE_flags, Flags);
+ NewCU.addString(*Die, dwarf::DW_AT_APPLE_flags, Flags);
if (unsigned RVer = DIUnit.getRunTimeVersion())
- NewCU.addUInt(Die, dwarf::DW_AT_APPLE_major_runtime_vers,
+ NewCU.addUInt(*Die, dwarf::DW_AT_APPLE_major_runtime_vers,
dwarf::DW_FORM_data1, RVer);
if (!FirstCU)
// class type.
return;
- DIE *SubprogramDie = TheCU.getOrCreateSubprogramDIE(SP);
+ DIE &SubprogramDie = *TheCU.getOrCreateSubprogramDIE(SP);
// Expose as a global name.
TheCU.addGlobalName(SP.getName(), SubprogramDie, resolve(SP.getContext()));
assert(Module.Verify() &&
"Use one of the MDNode * overloads to handle invalid metadata");
assert(Context && "Should always have a context for an imported_module");
- DIE *IMDie = TheCU.createAndAddDIE(Module.getTag(), *Context, Module);
+ DIE &IMDie = TheCU.createAndAddDIE(Module.getTag(), *Context, Module);
DIE *EntityDie;
DIDescriptor Entity = resolve(Module.getEntity());
if (Entity.isNameSpace())
TheCU.addSourceLine(IMDie, Module.getLineNumber(),
Module.getContext().getFilename(),
Module.getContext().getDirectory());
- TheCU.addDIEEntry(IMDie, dwarf::DW_AT_import, EntityDie);
+ TheCU.addDIEEntry(IMDie, dwarf::DW_AT_import, *EntityDie);
StringRef Name = Module.getName();
if (!Name.empty())
TheCU.addString(IMDie, dwarf::DW_AT_name, Name);
void DwarfDebug::computeInlinedDIEs() {
// Attach DW_AT_inline attribute with inlined subprogram DIEs.
for (DIE *ISP : InlinedSubprogramDIEs)
- FirstCU->addUInt(ISP, dwarf::DW_AT_inline, None, dwarf::DW_INL_inlined);
+ FirstCU->addUInt(*ISP, dwarf::DW_AT_inline, None, dwarf::DW_INL_inlined);
for (const auto &AI : AbstractSPDies) {
- DIE *ISP = AI.second;
- if (InlinedSubprogramDIEs.count(ISP))
+ DIE &ISP = *AI.second;
+ if (InlinedSubprogramDIEs.count(&ISP))
continue;
FirstCU->addUInt(ISP, dwarf::DW_AT_inline, None, dwarf::DW_INL_inlined);
}
DIVariable DV(Variables.getElement(vi));
if (!DV.isVariable())
continue;
- DbgVariable NewVar(DV, NULL, this);
- if (DIE *VariableDIE = SPCU->constructVariableDIE(NewVar, false))
- SPDIE->addChild(VariableDIE);
+ DbgVariable NewVar(DV, nullptr, this);
+ SPDIE->addChild(SPCU->constructVariableDIE(NewVar, false));
}
}
}
TheU->constructContainingTypeDIEs();
// Add CU specific attributes if we need to add any.
- if (TheU->getUnitDie()->getTag() == dwarf::DW_TAG_compile_unit) {
+ if (TheU->getUnitDie().getTag() == dwarf::DW_TAG_compile_unit) {
// If we're splitting the dwarf out now that we've got the entire
// CU then add the dwo id to it.
DwarfCompileUnit *SkCU =
static_cast<DwarfCompileUnit *>(TheU->getSkeleton());
if (useSplitDwarf()) {
// Emit a unique identifier for this CU.
- uint64_t ID = DIEHash(Asm).computeCUSignature(*TheU->getUnitDie());
+ uint64_t ID = DIEHash(Asm).computeCUSignature(TheU->getUnitDie());
TheU->addUInt(TheU->getUnitDie(), dwarf::DW_AT_GNU_dwo_id,
dwarf::DW_FORM_data8, ID);
SkCU->addUInt(SkCU->getUnitDie(), dwarf::DW_AT_GNU_dwo_id,
// We don't keep track of which addresses are used in which CU so this
// is a bit pessimistic under LTO.
- if (!InfoHolder.getAddressPool().isEmpty())
+ if (!AddrPool.isEmpty())
addSectionLabel(*Asm, *SkCU, SkCU->getUnitDie(),
dwarf::DW_AT_GNU_addr_base, DwarfAddrSectionSym,
DwarfAddrSectionSym);
// Some symbols (e.g. common/bss on mach-o) can have no section but still
// appear in the output. This sucks as we rely on sections to build
// arange spans. We can do it without, but it's icky.
- SectionMap[NULL].push_back(SCU);
+ SectionMap[nullptr].push_back(SCU);
}
}
// Add terminating symbols for each section.
for (unsigned ID = 0, E = Sections.size(); ID != E; ID++) {
const MCSection *Section = Sections[ID];
- MCSymbol *Sym = NULL;
+ MCSymbol *Sym = nullptr;
if (Section) {
// We can't call MCSection::getLabelEndName, as it's only safe to do so
}
// Insert a final terminator.
- SectionMap[Section].push_back(SymbolCU(NULL, Sym));
+ SectionMap[Section].push_back(SymbolCU(nullptr, Sym));
}
}
emitDebugAbbrevDWO();
emitDebugLineDWO();
// Emit DWO addresses.
- InfoHolder.getAddressPool().emit(
- *Asm, Asm->getObjFileLowering().getDwarfAddrSection());
+ AddrPool.emit(*Asm, Asm->getObjFileLowering().getDwarfAddrSection());
emitDebugLocDWO();
} else
// Emit info into a debug loc section.
SPMap.clear();
// Reset these for the next Module if we have one.
- FirstCU = NULL;
+ FirstCU = nullptr;
}
// Find abstract variable, if any, associated with Var.
LexicalScope *Scope = LScopes.findAbstractScope(ScopeLoc.getScope(Ctx));
if (!Scope)
- return NULL;
+ return nullptr;
- AbsDbgVariable = new DbgVariable(Var, NULL, this);
+ AbsDbgVariable = new DbgVariable(Var, nullptr, this);
addScopeVariable(Scope, AbsDbgVariable);
AbstractVariables[Var] = AbsDbgVariable;
return AbsDbgVariable;
LexicalScope *Scope = LScopes.findLexicalScope(VI.Loc);
// If variable scope is not found then skip this variable.
- if (Scope == 0)
+ if (!Scope)
continue;
DbgVariable *AbsDbgVariable = findAbstractVariable(DV, VI.Loc);
}
// Get .debug_loc entry for the instruction range starting at MI.
-static DebugLocEntry getDebugLocEntry(AsmPrinter *Asm,
- const MCSymbol *FLabel,
- const MCSymbol *SLabel,
- const MachineInstr *MI,
- DwarfCompileUnit *Unit) {
+static DebugLocEntry::Value getDebugLocValue(const MachineInstr *MI) {
const MDNode *Var = MI->getDebugVariable();
assert(MI->getNumOperands() == 3);
MLoc.set(MI->getOperand(0).getReg());
else
MLoc.set(MI->getOperand(0).getReg(), MI->getOperand(1).getImm());
- return DebugLocEntry(FLabel, SLabel, MLoc, Var, Unit);
+ return DebugLocEntry::Value(Var, MLoc);
}
if (MI->getOperand(0).isImm())
- return DebugLocEntry(FLabel, SLabel, MI->getOperand(0).getImm(), Var, Unit);
+ return DebugLocEntry::Value(Var, MI->getOperand(0).getImm());
if (MI->getOperand(0).isFPImm())
- return DebugLocEntry(FLabel, SLabel, MI->getOperand(0).getFPImm(),
- Var, Unit);
+ return DebugLocEntry::Value(Var, MI->getOperand(0).getFPImm());
if (MI->getOperand(0).isCImm())
- return DebugLocEntry(FLabel, SLabel, MI->getOperand(0).getCImm(),
- Var, Unit);
+ return DebugLocEntry::Value(Var, MI->getOperand(0).getCImm());
llvm_unreachable("Unexpected 3 operand DBG_VALUE instruction!");
}
// Find variables for each lexical scope.
void
DwarfDebug::collectVariableInfo(SmallPtrSet<const MDNode *, 16> &Processed) {
+ LexicalScope *FnScope = LScopes.getCurrentFunctionScope();
+ DwarfCompileUnit *TheCU = SPMap.lookup(FnScope->getScopeNode());
// Grab the variable info that was squirreled away in the MMI side-table.
collectVariableInfoFromMMITable(Processed);
const MachineInstr *MInsn = History.front();
DIVariable DV(Var);
- LexicalScope *Scope = NULL;
+ LexicalScope *Scope = nullptr;
if (DV.getTag() == dwarf::DW_TAG_arg_variable &&
DISubprogram(DV.getContext()).describes(CurFn->getFunction()))
Scope = LScopes.getCurrentFunctionScope();
// Compute the range for a register location.
const MCSymbol *FLabel = getLabelBeforeInsn(Begin);
- const MCSymbol *SLabel = 0;
+ const MCSymbol *SLabel = nullptr;
if (HI + 1 == HE)
// If Begin is the last instruction in History then its value is valid
@@ -1244,23 +1248,20 @@ DwarfDebug::collectVariableInfo(SmallPtrSet<const MDNode *, 16> &Processed) {
}
// The value is valid until the next DBG_VALUE or clobber.
- LexicalScope *FnScope = LScopes.getCurrentFunctionScope();
- DwarfCompileUnit *TheCU = SPMap.lookup(FnScope->getScopeNode());
- DebugLocEntry Loc = getDebugLocEntry(Asm, FLabel, SLabel, Begin, TheCU);
+ DebugLocEntry Loc(FLabel, SLabel, getDebugLocValue(Begin), TheCU);
if (DebugLoc.empty() || !DebugLoc.back().Merge(Loc))
DebugLoc.push_back(std::move(Loc));
}
}
// Collect info for variables that were optimized out.
- LexicalScope *FnScope = LScopes.getCurrentFunctionScope();
DIArray Variables = DISubprogram(FnScope->getScopeNode()).getVariables();
for (unsigned i = 0, e = Variables.getNumElements(); i != e; ++i) {
DIVariable DV(Variables.getElement(i));
if (!DV || !DV.isVariable() || !Processed.insert(DV))
continue;
if (LexicalScope *Scope = LScopes.findLexicalScope(DV.getContext()))
- addScopeVariable(Scope, new DbgVariable(DV, NULL, this));
+ addScopeVariable(Scope, new DbgVariable(DV, nullptr, this));
}
}
const MDNode *Scope = DL.getScope(Asm->MF->getFunction()->getContext());
recordSourceLine(DL.getLine(), DL.getCol(), Scope, Flags);
} else
- recordSourceLine(0, 0, 0, 0);
+ recordSourceLine(0, 0, nullptr, 0);
}
}
// Don't create a new label after DBG_VALUE instructions.
// They don't generate code.
if (!CurMI->isDebugValue())
- PrevLabel = 0;
+ PrevLabel = nullptr;
DenseMap<const MachineInstr *, MCSymbol *>::iterator I =
LabelsAfterInsn.find(CurMI);
- CurMI = 0;
+ CurMI = nullptr;
// No label needed.
if (I == LabelsAfterInsn.end())
if (!Var)
continue;
// Reg is now clobbered.
- LiveUserVar[Reg] = 0;
+ LiveUserVar[Reg] = nullptr;
// Was MD last defined by a DBG_VALUE referring to Reg?
DbgValueHistoryMap::iterator HistI = DbgValues.find(Var);
// Every beginFunction(MF) call should be followed by an endFunction(MF) call,
// though the beginFunction may not be called at all.
// We should handle both cases.
- if (CurFn == 0)
+ if (!CurFn)
CurFn = MF;
else
assert(CurFn == MF);
// previously used section to nullptr.
PrevSection = nullptr;
PrevCU = nullptr;
- CurFn = 0;
+ CurFn = nullptr;
return;
}
if (AbstractVariables.lookup(CleanDV))
continue;
if (LexicalScope *Scope = LScopes.findAbstractScope(DV.getContext()))
- addScopeVariable(Scope, new DbgVariable(DV, NULL, this));
+ addScopeVariable(Scope, new DbgVariable(DV, nullptr, this));
}
}
if (ProcessedSPNodes.count(AScope->getScopeNode()) == 0)
constructScopeDIE(TheCU, AScope);
}
- DIE *CurFnDIE = constructScopeDIE(TheCU, FnScope);
+ DIE &CurFnDIE = *constructScopeDIE(TheCU, FnScope);
if (!CurFn->getTarget().Options.DisableFramePointerElim(*CurFn))
TheCU.addFlag(CurFnDIE, dwarf::DW_AT_APPLE_omit_frame_ptr);
AbstractVariables.clear();
LabelsBeforeInsn.clear();
LabelsAfterInsn.clear();
- PrevLabel = NULL;
- CurFn = 0;
+ PrevLabel = nullptr;
+ CurFn = nullptr;
}
// Register a source line with debug info. Returns the unique label that was
// Emit visible names into a hashed accelerator table section.
void DwarfDebug::emitAccelNames() {
- DwarfAccelTable AT(
- DwarfAccelTable::Atom(dwarf::DW_ATOM_die_offset, dwarf::DW_FORM_data4));
- for (const auto &TheU : getUnits()) {
- for (const auto &GI : TheU->getAccelNames()) {
- StringRef Name = GI.getKey();
- for (const DIE *D : GI.second)
- AT.AddName(Name, D);
- }
- }
-
- AT.FinalizeTable(Asm, "Names");
+ AccelNames.FinalizeTable(Asm, "Names");
Asm->OutStreamer.SwitchSection(
Asm->getObjFileLowering().getDwarfAccelNamesSection());
MCSymbol *SectionBegin = Asm->GetTempSymbol("names_begin");
Asm->OutStreamer.EmitLabel(SectionBegin);
// Emit the full data.
- AT.Emit(Asm, SectionBegin, &InfoHolder);
+ AccelNames.Emit(Asm, SectionBegin, &InfoHolder);
}
// Emit objective C classes and categories into a hashed accelerator table
// section.
void DwarfDebug::emitAccelObjC() {
- DwarfAccelTable AT(
- DwarfAccelTable::Atom(dwarf::DW_ATOM_die_offset, dwarf::DW_FORM_data4));
- for (const auto &TheU : getUnits()) {
- for (const auto &GI : TheU->getAccelObjC()) {
- StringRef Name = GI.getKey();
- for (const DIE *D : GI.second)
- AT.AddName(Name, D);
- }
- }
-
- AT.FinalizeTable(Asm, "ObjC");
+ AccelObjC.FinalizeTable(Asm, "ObjC");
Asm->OutStreamer.SwitchSection(
Asm->getObjFileLowering().getDwarfAccelObjCSection());
MCSymbol *SectionBegin = Asm->GetTempSymbol("objc_begin");
Asm->OutStreamer.EmitLabel(SectionBegin);
// Emit the full data.
- AT.Emit(Asm, SectionBegin, &InfoHolder);
+ AccelObjC.Emit(Asm, SectionBegin, &InfoHolder);
}
// Emit namespace dies into a hashed accelerator table.
void DwarfDebug::emitAccelNamespaces() {
- DwarfAccelTable AT(
- DwarfAccelTable::Atom(dwarf::DW_ATOM_die_offset, dwarf::DW_FORM_data4));
- for (const auto &TheU : getUnits()) {
- for (const auto &GI : TheU->getAccelNamespace()) {
- StringRef Name = GI.getKey();
- for (const DIE *D : GI.second)
- AT.AddName(Name, D);
- }
- }
-
- AT.FinalizeTable(Asm, "namespac");
+ AccelNamespace.FinalizeTable(Asm, "namespac");
Asm->OutStreamer.SwitchSection(
Asm->getObjFileLowering().getDwarfAccelNamespaceSection());
MCSymbol *SectionBegin = Asm->GetTempSymbol("namespac_begin");
Asm->OutStreamer.EmitLabel(SectionBegin);
// Emit the full data.
- AT.Emit(Asm, SectionBegin, &InfoHolder);
+ AccelNamespace.Emit(Asm, SectionBegin, &InfoHolder);
}
// Emit type dies into a hashed accelerator table.
void DwarfDebug::emitAccelTypes() {
- std::vector<DwarfAccelTable::Atom> Atoms;
- Atoms.push_back(
- DwarfAccelTable::Atom(dwarf::DW_ATOM_die_offset, dwarf::DW_FORM_data4));
- Atoms.push_back(
- DwarfAccelTable::Atom(dwarf::DW_ATOM_die_tag, dwarf::DW_FORM_data2));
- Atoms.push_back(
- DwarfAccelTable::Atom(dwarf::DW_ATOM_type_flags, dwarf::DW_FORM_data1));
- DwarfAccelTable AT(Atoms);
- for (const auto &TheU : getUnits()) {
- for (const auto &GI : TheU->getAccelTypes()) {
- StringRef Name = GI.getKey();
- for (const auto &DI : GI.second)
- AT.AddName(Name, DI.first, DI.second);
- }
- }
- AT.FinalizeTable(Asm, "types");
+ AccelTypes.FinalizeTable(Asm, "types");
Asm->OutStreamer.SwitchSection(
Asm->getObjFileLowering().getDwarfAccelTypesSection());
MCSymbol *SectionBegin = Asm->GetTempSymbol("types_begin");
Asm->OutStreamer.EmitLabel(SectionBegin);
// Emit the full data.
- AT.Emit(Asm, SectionBegin, &InfoHolder);
+ AccelTypes.Emit(Asm, SectionBegin, &InfoHolder);
}
// Public name handling.
// look for that now.
DIEValue *SpecVal = Die->findAttribute(dwarf::DW_AT_specification);
if (SpecVal) {
- DIE *SpecDIE = cast<DIEEntry>(SpecVal)->getEntry();
- if (SpecDIE->findAttribute(dwarf::DW_AT_external))
+ DIE &SpecDIE = cast<DIEEntry>(SpecVal)->getEntry();
+ if (SpecDIE.findAttribute(dwarf::DW_AT_external))
Linkage = dwarf::GIEL_EXTERNAL;
} else if (Die->findAttribute(dwarf::DW_AT_external))
Linkage = dwarf::GIEL_EXTERNAL;
void DwarfDebug::emitDebugLocEntry(ByteStreamer &Streamer,
const DebugLocEntry &Entry) {
- DIVariable DV(Entry.getVariable());
- if (Entry.isInt()) {
+ assert(Entry.getValues().size() == 1 &&
+ "multi-value entries are not supported yet.");
+ const DebugLocEntry::Value Value = Entry.getValues()[0];
+ DIVariable DV(Value.getVariable());
+ if (Value.isInt()) {
DIBasicType BTy(resolve(DV.getType()));
if (BTy.Verify() && (BTy.getEncoding() == dwarf::DW_ATE_signed ||
BTy.getEncoding() == dwarf::DW_ATE_signed_char)) {
Streamer.EmitInt8(dwarf::DW_OP_consts, "DW_OP_consts");
- Streamer.EmitSLEB128(Entry.getInt());
+ Streamer.EmitSLEB128(Value.getInt());
} else {
Streamer.EmitInt8(dwarf::DW_OP_constu, "DW_OP_constu");
- Streamer.EmitULEB128(Entry.getInt());
+ Streamer.EmitULEB128(Value.getInt());
}
- } else if (Entry.isLocation()) {
- MachineLocation Loc = Entry.getLoc();
+ } else if (Value.isLocation()) {
+ MachineLocation Loc = Value.getLoc();
if (!DV.hasComplexAddress())
// Regular entry.
Asm->EmitDwarfRegOp(Streamer, Loc, DV.isIndirect());
// address we know we've emitted elsewhere (the start of the function?
// The start of the CU or CU subrange that encloses this range?)
Asm->EmitInt8(dwarf::DW_LLE_start_length_entry);
- unsigned idx = InfoHolder.getAddressPool().getIndex(Entry.getBeginSym());
+ unsigned idx = AddrPool.getIndex(Entry.getBeginSym());
Asm->EmitULEB128(idx);
Asm->EmitLabelDifference(Entry.getEndSym(), Entry.getBeginSym(), 4);
// If we have no section (e.g. common), just write out
// individual spans for each symbol.
- if (Section == NULL) {
+ if (!Section) {
for (const SymbolCU &Cur : List) {
ArangeSpan Span;
Span.Start = Cur.Sym;
- Span.End = NULL;
+ Span.End = nullptr;
if (Cur.CU)
Spans[Cur.CU].push_back(Span);
}
const MCSymbol *End = Range.getEnd();
assert(Begin && "Range without a begin symbol?");
assert(End && "Range without an end symbol?");
- Asm->OutStreamer.EmitSymbolValue(Begin, Size);
- Asm->OutStreamer.EmitSymbolValue(End, Size);
+ if (TheCU->getRanges().size() == 1) {
+ // Grab the begin symbol from the first range as our base.
+ const MCSymbol *Base = TheCU->getRanges()[0].getStart();
+ Asm->EmitLabelDifference(Begin, Base, Size);
+ Asm->EmitLabelDifference(End, Base, Size);
+ } else {
+ Asm->OutStreamer.EmitSymbolValue(Begin, Size);
+ Asm->OutStreamer.EmitSymbolValue(End, Size);
+ }
}
// And terminate the list with two 0 values.
// DWARF5 Experimental Separate Dwarf emitters.
-void DwarfDebug::initSkeletonUnit(const DwarfUnit &U, DIE *Die,
+void DwarfDebug::initSkeletonUnit(const DwarfUnit &U, DIE &Die,
std::unique_ptr<DwarfUnit> NewU) {
NewU->addLocalString(Die, dwarf::DW_AT_GNU_dwo_name,
U.getCUNode().getSplitDebugFilename());
@@ -2445,7 +2411,7 @@ DwarfCompileUnit &DwarfDebug::constructSkeletonCU(const DwarfCompileUnit &CU) {
NewCU.initStmtList(DwarfLineSectionSym);
- initSkeletonUnit(CU, Die, std::move(OwnedUnit));
+ initSkeletonUnit(CU, *Die, std::move(OwnedUnit));
return NewCU;
}
this, &SkeletonHolder);
DwarfTypeUnit &NewTU = *OwnedUnit;
NewTU.setTypeSignature(TU.getTypeSignature());
- NewTU.setType(NULL);
+ NewTU.setType(nullptr);
NewTU.initSection(
Asm->getObjFileLowering().getDwarfTypesSection(TU.getTypeSignature()));
- initSkeletonUnit(TU, Die, std::move(OwnedUnit));
+ initSkeletonUnit(TU, *Die, std::move(OwnedUnit));
return NewTU;
}
@@ -2512,14 +2478,25 @@ MCDwarfDwoLineTable *DwarfDebug::getDwoLineTable(const DwarfCompileUnit &CU) {
return &SplitTypeUnitFileTable;
}
+static uint64_t makeTypeSignature(StringRef Identifier) {
+ MD5 Hash;
+ Hash.update(Identifier);
+ // ... take the least significant 8 bytes and return those. Our MD5
+ // implementation always returns its results in little endian, swap bytes
+ // appropriately.
+ MD5::MD5Result Result;
+ Hash.final(Result);
+ return *reinterpret_cast<support::ulittle64_t *>(Result + 8);
+}
+
void DwarfDebug::addDwarfTypeUnitType(DwarfCompileUnit &CU,
- StringRef Identifier, DIE *RefDie,
+ StringRef Identifier, DIE &RefDie,
DICompositeType CTy) {
- // Flag the type unit reference as a declaration so that if it contains
- // members (implicit special members, static data member definitions, member
- // declarations for definitions in this CU, etc) consumers don't get confused
- // and think this is a full definition.
- CU.addFlag(RefDie, dwarf::DW_AT_declaration);
+ // Fast path if we're building some type units and one has already used the
+ // address pool we know we're going to throw away all this work anyway, so
+ // don't bother building dependent types.
+ if (!TypeUnitsUnderConstruction.empty() && AddrPool.hasBeenUsed())
+ return;
const DwarfTypeUnit *&TU = DwarfTypeUnits[CTy];
if (TU) {
return;
}
+ bool TopLevelType = TypeUnitsUnderConstruction.empty();
+ AddrPool.resetUsedFlag();
+
DIE *UnitDie = new DIE(dwarf::DW_TAG_type_unit);
auto OwnedUnit =
make_unique<DwarfTypeUnit>(InfoHolder.getUnits().size(), UnitDie, CU, Asm,
this, &InfoHolder, getDwoLineTable(CU));
DwarfTypeUnit &NewTU = *OwnedUnit;
TU = &NewTU;
- InfoHolder.addUnit(std::move(OwnedUnit));
+ TypeUnitsUnderConstruction.push_back(std::make_pair(std::move(OwnedUnit), CTy));
- NewTU.addUInt(UnitDie, dwarf::DW_AT_language, dwarf::DW_FORM_data2,
+ NewTU.addUInt(*UnitDie, dwarf::DW_AT_language, dwarf::DW_FORM_data2,
CU.getLanguage());
- MD5 Hash;
- Hash.update(Identifier);
- // ... take the least significant 8 bytes and return those. Our MD5
- // implementation always returns its results in little endian, swap bytes
- // appropriately.
- MD5::MD5Result Result;
- Hash.final(Result);
- uint64_t Signature = *reinterpret_cast<support::ulittle64_t *>(Result + 8);
+ uint64_t Signature = makeTypeSignature(Identifier);
NewTU.setTypeSignature(Signature);
- if (useSplitDwarf())
- NewTU.setSkeleton(constructSkeletonTU(NewTU));
- else
- CU.applyStmtList(*UnitDie);
- NewTU.setType(NewTU.createTypeDIE(CTy));
+ if (!useSplitDwarf())
+ CU.applyStmtList(*UnitDie);
NewTU.initSection(
useSplitDwarf()
? Asm->getObjFileLowering().getDwarfTypesDWOSection(Signature)
: Asm->getObjFileLowering().getDwarfTypesSection(Signature));
+ NewTU.setType(NewTU.createTypeDIE(CTy));
+
+ if (TopLevelType) {
+ auto TypeUnitsToAdd = std::move(TypeUnitsUnderConstruction);
+ TypeUnitsUnderConstruction.clear();
+
+ // Types referencing entries in the address table cannot be placed in type
+ // units.
+ if (AddrPool.hasBeenUsed()) {
+
+ // Remove all the types built while building this type.
+ // This is pessimistic as some of these types might not be dependent on
+ // the type that used an address.
+ for (const auto &TU : TypeUnitsToAdd)
+ DwarfTypeUnits.erase(TU.second);
+
+ // Construct this type in the CU directly.
+ // This is inefficient because all the dependent types will be rebuilt
+ // from scratch, including building them in type units, discovering that
+ // they depend on addresses, throwing them out and rebuilding them.
+ CU.constructTypeDIE(RefDie, CTy);
+ return;
+ }
+
+ // If the type wasn't dependent on fission addresses, finish adding the type
+ // and all its dependent types.
+ for (auto &TU : TypeUnitsToAdd) {
+ if (useSplitDwarf())
+ TU.first->setSkeleton(constructSkeletonTU(*TU.first));
+ InfoHolder.addUnit(std::move(TU.first));
+ }
+ }
CU.addDIETypeSignature(RefDie, NewTU);
}
-void DwarfDebug::attachLowHighPC(DwarfCompileUnit &Unit, DIE *D,
+void DwarfDebug::attachLowHighPC(DwarfCompileUnit &Unit, DIE &D,
MCSymbol *Begin, MCSymbol *End) {
Unit.addLabelAddress(D, dwarf::DW_AT_low_pc, Begin);
if (DwarfVersion < 4)
else
Unit.addLabelDelta(D, dwarf::DW_AT_high_pc, End, Begin);
}
+
+// Accelerator table mutators - add each name along with its companion
+// DIE to the proper table while ensuring that the name that we're going
+// to reference is in the string table. We do this since the names we
+// add may not only be identical to the names in the DIE.
+void DwarfDebug::addAccelName(StringRef Name, const DIE &Die) {
+ if (!useDwarfAccelTables())
+ return;
+ AccelNames.AddName(Name, InfoHolder.getStringPool().getSymbol(*Asm, Name),
+ &Die);
+}
+
+void DwarfDebug::addAccelObjC(StringRef Name, const DIE &Die) {
+ if (!useDwarfAccelTables())
+ return;
+ AccelObjC.AddName(Name, InfoHolder.getStringPool().getSymbol(*Asm, Name),
+ &Die);
+}
+
+void DwarfDebug::addAccelNamespace(StringRef Name, const DIE &Die) {
+ if (!useDwarfAccelTables())
+ return;
+ AccelNamespace.AddName(Name, InfoHolder.getStringPool().getSymbol(*Asm, Name),
+ &Die);
+}
+
+void DwarfDebug::addAccelType(StringRef Name, const DIE &Die, char Flags) {
+ if (!useDwarfAccelTables())
+ return;
+ AccelTypes.AddName(Name, InfoHolder.getStringPool().getSymbol(*Asm, Name),
+ &Die);
+}