DIArray Elements = DICompositeType(subType).getTypeArray();
for (unsigned i = 0, N = Elements.getNumElements(); i < N; ++i) {
- DIDerivedType DT = DIDerivedType(Elements.getElement(i));
+ DIDerivedType DT(Elements.getElement(i));
if (getName() == DT.getName())
return (resolve(DT.getTypeDerivedFrom()));
}
AbbreviationsSet(InitAbbreviationsSetSize),
SourceIdMap(DIEValueAllocator),
PrevLabel(NULL), GlobalCUIndexCount(0),
- InfoHolder(A, &AbbreviationsSet, &Abbreviations, "info_string",
+ InfoHolder(A, &AbbreviationsSet, Abbreviations, "info_string",
DIEValueAllocator),
SkeletonAbbrevSet(InitAbbreviationsSetSize),
- SkeletonHolder(A, &SkeletonAbbrevSet, &SkeletonAbbrevs, "skel_string",
+ SkeletonHolder(A, &SkeletonAbbrevSet, SkeletonAbbrevs, "skel_string",
DIEValueAllocator) {
DwarfInfoSectionSym = DwarfAbbrevSectionSym = 0;
// If it's newly added.
if (InSet == &Abbrev) {
// Add to abbreviation list.
- Abbreviations->push_back(&Abbrev);
+ Abbreviations.push_back(&Abbrev);
// Assign the vector position + 1 as its number.
- Abbrev.setNumber(Abbreviations->size());
+ Abbrev.setNumber(Abbreviations.size());
} else {
// Assign existing abbreviation number.
Abbrev.setNumber(InSet->getNumber());
// Find DIE for the given subprogram and attach appropriate DW_AT_low_pc
// and DW_AT_high_pc attributes. If there are global variables in this
// scope then create and insert DIEs for these variables.
-DIE *DwarfDebug::updateSubprogramScopeDIE(CompileUnit *SPCU,
- const MDNode *SPNode) {
- DIE *SPDie = SPCU->getDIE(SPNode);
+DIE *DwarfDebug::updateSubprogramScopeDIE(CompileUnit *SPCU, DISubprogram SP) {
+ DIE *SPDie = SPCU->getDIE(SP);
assert(SPDie && "Unable to find subprogram DIE!");
- DISubprogram SP(SPNode);
// If we're updating an abstract DIE, then we will be adding the children and
// object pointer later on. But what we don't want to do is process the
// concrete DIE twice.
- if (DIE *AbsSPDIE = AbstractSPDies.lookup(SPNode)) {
+ if (DIE *AbsSPDIE = AbstractSPDies.lookup(SP)) {
// Pick up abstract subprogram DIE.
SPDie = SPCU->createAndAddDIE(dwarf::DW_TAG_subprogram, *SPCU->getCUDie());
SPCU->addDIEEntry(SPDie, dwarf::DW_AT_abstract_origin, AbsSPDIE);
for (unsigned i = 1, N = Args.getNumElements(); i < N; ++i) {
DIE *Arg =
SPCU->createAndAddDIE(dwarf::DW_TAG_formal_parameter, *SPDie);
- DIType ATy = DIType(Args.getElement(i));
+ DIType ATy(Args.getElement(i));
SPCU->addType(Arg, ATy);
if (ATy.isArtificial())
SPCU->addFlag(Arg, dwarf::DW_AT_artificial);
for (unsigned i = 0, N = CurrentFnArguments.size(); i < N; ++i)
if (DbgVariable *ArgDV = CurrentFnArguments[i])
if (DIE *Arg =
- TheCU->constructVariableDIE(ArgDV, Scope->isAbstractScope())) {
+ TheCU->constructVariableDIE(*ArgDV, Scope->isAbstractScope())) {
Children.push_back(Arg);
if (ArgDV->isObjectPointer()) ObjectPointer = Arg;
}
const SmallVectorImpl<DbgVariable *> &Variables =ScopeVariables.lookup(Scope);
for (unsigned i = 0, N = Variables.size(); i < N; ++i)
if (DIE *Variable =
- TheCU->constructVariableDIE(Variables[i], Scope->isAbstractScope())) {
+ TheCU->constructVariableDIE(*Variables[i], Scope->isAbstractScope())) {
Children.push_back(Variable);
if (Variables[i]->isObjectPointer()) ObjectPointer = Variable;
}
// Note down abstract DIE.
if (ScopeDIE)
AbstractSPDies.insert(std::make_pair(DS, ScopeDIE));
- }
- else
- ScopeDIE = updateSubprogramScopeDIE(TheCU, DS);
- }
- else {
+ } else
+ ScopeDIE = updateSubprogramScopeDIE(TheCU, DISubprogram(DS));
+ } else {
// Early exit when we know the scope DIE is going to be null.
if (isLexicalScopeDIENull(Scope))
return NULL;
// Create new CompileUnit for the given metadata node with tag
// DW_TAG_compile_unit.
-CompileUnit *DwarfDebug::constructCompileUnit(const MDNode *N) {
- DICompileUnit DIUnit(N);
+CompileUnit *DwarfDebug::constructCompileUnit(DICompileUnit DIUnit) {
StringRef FN = DIUnit.getFilename();
CompilationDir = DIUnit.getDirectory();
DIE *Die = new DIE(dwarf::DW_TAG_compile_unit);
- CompileUnit *NewCU =
- new CompileUnit(GlobalCUIndexCount++, Die, N, Asm, this, &InfoHolder);
+ CompileUnit *NewCU = new CompileUnit(GlobalCUIndexCount++, Die, DIUnit, Asm,
+ this, &InfoHolder);
FileIDCUMap[NewCU->getUniqueID()] = 0;
// Call this to emit a .file directive if it wasn't emitted for the source
InfoHolder.addUnit(NewCU);
- CUMap.insert(std::make_pair(N, NewCU));
+ CUMap.insert(std::make_pair(DIUnit, NewCU));
+ CUDieMap.insert(std::make_pair(Die, NewCU));
return NewCU;
}
ScopesWithImportedEntities.end(), less_first());
DIArray GVs = CUNode.getGlobalVariables();
for (unsigned i = 0, e = GVs.getNumElements(); i != e; ++i)
- CU->createGlobalVariableDIE(GVs.getElement(i));
+ CU->createGlobalVariableDIE(DIGlobalVariable(GVs.getElement(i)));
DIArray SPs = CUNode.getSubprograms();
for (unsigned i = 0, e = SPs.getNumElements(); i != e; ++i)
constructSubprogramDIE(CU, SPs.getElement(i));
continue;
DbgVariable NewVar(DV, NULL, this);
if (DIE *VariableDIE =
- SPCU->constructVariableDIE(&NewVar, false))
+ SPCU->constructVariableDIE(NewVar, false))
SPDIE->addChild(VariableDIE);
}
}
// Gather pre-function debug information. Assumes being called immediately
// after the function entry point has been emitted.
void DwarfDebug::beginFunction(const MachineFunction *MF) {
- if (!MMI->hasDebugInfo()) return;
+
+ // If there's no debug info for the function we're not going to do anything.
+ if (!MMI->hasDebugInfo())
+ return;
+
+ // Grab the lexical scopes for the function, if we don't have any of those
+ // then we're not going to be able to do anything.
LScopes.initialize(*MF);
- if (LScopes.empty()) return;
+ if (LScopes.empty())
+ return;
+
+ assert(UserVariables.empty() && DbgValues.empty() && "Maps weren't cleaned");
+
+ // Make sure that each lexical scope will have a begin/end label.
identifyScopeMarkers();
// Set DwarfCompileUnitID in MCContext to the Compile Unit this function
- // belongs to.
+ // belongs to so that we add to the correct per-cu line table in the
+ // non-asm case.
LexicalScope *FnScope = LScopes.getCurrentFunctionScope();
CompileUnit *TheCU = SPMap.lookup(FnScope->getScopeNode());
assert(TheCU && "Unable to find compile unit!");
else
Asm->OutStreamer.getContext().setDwarfCompileUnitID(TheCU->getUniqueID());
- FunctionBeginSym = Asm->GetTempSymbol("func_begin",
- Asm->getFunctionNumber());
+ // Emit a label for the function so that we have a beginning address.
+ FunctionBeginSym = Asm->GetTempSymbol("func_begin", Asm->getFunctionNumber());
// Assumes in correct section after the entry point.
Asm->OutStreamer.EmitLabel(FunctionBeginSym);
- assert(UserVariables.empty() && DbgValues.empty() && "Maps weren't cleaned");
-
const TargetRegisterInfo *TRI = Asm->TM.getRegisterInfo();
// LiveUserVar - Map physreg numbers to the MDNode they contain.
- std::vector<const MDNode*> LiveUserVar(TRI->getNumRegs());
+ std::vector<const MDNode *> LiveUserVar(TRI->getNumRegs());
- for (MachineFunction::const_iterator I = MF->begin(), E = MF->end();
- I != E; ++I) {
+ for (MachineFunction::const_iterator I = MF->begin(), E = MF->end(); I != E;
+ ++I) {
bool AtBlockEntry = true;
for (MachineBasicBlock::const_iterator II = I->begin(), IE = I->end();
II != IE; ++II) {
// Keep track of user variables.
const MDNode *Var =
- MI->getOperand(MI->getNumOperands() - 1).getMetadata();
+ MI->getOperand(MI->getNumOperands() - 1).getMetadata();
// Variable is in a register, we need to check for clobbers.
if (isDbgValueInDefinedReg(MI))
LiveUserVar[MI->getOperand(0).getReg()] = Var;
// Check the history of this variable.
- SmallVectorImpl<const MachineInstr*> &History = DbgValues[Var];
+ SmallVectorImpl<const MachineInstr *> &History = DbgValues[Var];
if (History.empty()) {
UserVariables.push_back(Var);
// The first mention of a function argument gets the FunctionBeginSym
// label, so arguments are visible when breaking at function entry.
DIVariable DV(Var);
if (DV.isVariable() && DV.getTag() == dwarf::DW_TAG_arg_variable &&
- DISubprogram(getDISubprogram(DV.getContext()))
- .describes(MF->getFunction()))
+ getDISubprogram(DV.getContext()).describes(MF->getFunction()))
LabelsBeforeInsn[MI] = FunctionBeginSym;
} else {
// We have seen this variable before. Try to coalesce DBG_VALUEs.
if (History.size() >= 2 &&
Prev->isIdenticalTo(History[History.size() - 2])) {
DEBUG(dbgs() << "Coalescing identical DBG_VALUE entries:\n"
- << "\t" << *Prev
- << "\t" << *History[History.size() - 2] << "\n");
+ << "\t" << *Prev << "\t"
+ << *History[History.size() - 2] << "\n");
History.pop_back();
}
// Previous register assignment needs to terminate at the end of
// its basic block.
MachineBasicBlock::const_iterator LastMI =
- PrevMBB->getLastNonDebugInstr();
+ PrevMBB->getLastNonDebugInstr();
if (LastMI == PrevMBB->end()) {
// Drop DBG_VALUE for empty range.
DEBUG(dbgs() << "Dropping DBG_VALUE for empty range:\n"
- << "\t" << *Prev << "\n");
+ << "\t" << *Prev << "\n");
History.pop_back();
} else if (llvm::next(PrevMBB) != PrevMBB->getParent()->end())
// Terminate after LastMI.
// Check if the instruction clobbers any registers with debug vars.
for (MachineInstr::const_mop_iterator MOI = MI->operands_begin(),
- MOE = MI->operands_end(); MOI != MOE; ++MOI) {
+ MOE = MI->operands_end();
+ MOI != MOE; ++MOI) {
if (!MOI->isReg() || !MOI->isDef() || !MOI->getReg())
continue;
- for (MCRegAliasIterator AI(MOI->getReg(), TRI, true);
- AI.isValid(); ++AI) {
+ for (MCRegAliasIterator AI(MOI->getReg(), TRI, true); AI.isValid();
+ ++AI) {
unsigned Reg = *AI;
const MDNode *Var = LiveUserVar[Reg];
if (!Var)
DbgValueHistoryMap::iterator HistI = DbgValues.find(Var);
if (HistI == DbgValues.end())
continue;
- SmallVectorImpl<const MachineInstr*> &History = HistI->second;
+ SmallVectorImpl<const MachineInstr *> &History = HistI->second;
if (History.empty())
continue;
const MachineInstr *Prev = History.back();
for (DbgValueHistoryMap::iterator I = DbgValues.begin(), E = DbgValues.end();
I != E; ++I) {
- SmallVectorImpl<const MachineInstr*> &History = I->second;
+ SmallVectorImpl<const MachineInstr *> &History = I->second;
if (History.empty())
continue;
if (Prev->isDebugValue() && isDbgValueInDefinedReg(Prev)) {
const MachineBasicBlock *PrevMBB = Prev->getParent();
MachineBasicBlock::const_iterator LastMI =
- PrevMBB->getLastNonDebugInstr();
+ PrevMBB->getLastNonDebugInstr();
if (LastMI == PrevMBB->end())
// Drop DBG_VALUE for empty range.
History.pop_back();
// Record beginning of function.
if (!PrologEndLoc.isUnknown()) {
- DebugLoc FnStartDL = getFnDebugLoc(PrologEndLoc,
- MF->getFunction()->getContext());
- recordSourceLine(FnStartDL.getLine(), FnStartDL.getCol(),
- FnStartDL.getScope(MF->getFunction()->getContext()),
- // We'd like to list the prologue as "not statements" but GDB behaves
- // poorly if we do that. Revisit this with caution/GDB (7.5+) testing.
- DWARF2_FLAG_IS_STMT);
+ DebugLoc FnStartDL =
+ getFnDebugLoc(PrologEndLoc, MF->getFunction()->getContext());
+ recordSourceLine(
+ FnStartDL.getLine(), FnStartDL.getCol(),
+ FnStartDL.getScope(MF->getFunction()->getContext()),
+ // We'd like to list the prologue as "not statements" but GDB behaves
+ // poorly if we do that. Revisit this with caution/GDB (7.5+) testing.
+ DWARF2_FLAG_IS_STMT);
}
}
// Emit Methods
//===----------------------------------------------------------------------===//
-// Compute the size and offset of a DIE.
+// Compute the size and offset of a DIE. The offset is relative to start of the
+// CU. It returns the offset after laying out the DIE.
unsigned
DwarfUnits::computeSizeAndOffset(DIE *Die, unsigned Offset) {
// Get the children.
// Get the abbreviation for this DIE.
unsigned AbbrevNumber = Die->getAbbrevNumber();
- const DIEAbbrev *Abbrev = Abbreviations->at(AbbrevNumber - 1);
+ const DIEAbbrev *Abbrev = Abbreviations[AbbrevNumber - 1];
// Set DIE offset
Die->setOffset(Offset);
// Compute the size and offset for each DIE.
void DwarfUnits::computeSizeAndOffsets() {
+ // Offset from the first CU in the debug info section is 0 initially.
+ unsigned SecOffset = 0;
+
// Iterate over each compile unit and set the size and offsets for each
// DIE within each compile unit. All offsets are CU relative.
for (SmallVectorImpl<CompileUnit *>::iterator I = CUs.begin(),
E = CUs.end(); I != E; ++I) {
- unsigned Offset =
- sizeof(int32_t) + // Length of Compilation Unit Info
- sizeof(int16_t) + // DWARF version number
- sizeof(int32_t) + // Offset Into Abbrev. Section
- sizeof(int8_t); // Pointer Size (in bytes)
- computeSizeAndOffset((*I)->getCUDie(), Offset);
+ (*I)->setDebugInfoOffset(SecOffset);
+
+ // CU-relative offset is reset to 0 here.
+ unsigned Offset = sizeof(int32_t) + // Length of Unit Info
+ (*I)->getHeaderSize(); // Unit-specific headers
+
+ // EndOffset here is CU-relative, after laying out
+ // all of the CU DIE.
+ unsigned EndOffset = computeSizeAndOffset((*I)->getCUDie(), Offset);
+ SecOffset += EndOffset;
}
}
}
// Recursively emits a debug information entry.
-void DwarfDebug::emitDIE(DIE *Die, std::vector<DIEAbbrev *> *Abbrevs) {
+void DwarfDebug::emitDIE(DIE *Die, ArrayRef<DIEAbbrev *> Abbrevs) {
// Get the abbreviation for this DIE.
unsigned AbbrevNumber = Die->getAbbrevNumber();
- const DIEAbbrev *Abbrev = Abbrevs->at(AbbrevNumber - 1);
+ const DIEAbbrev *Abbrev = Abbrevs[AbbrevNumber - 1];
// Emit the code (index) for the abbreviation.
if (Asm->isVerbose())
Asm->OutStreamer.AddComment(dwarf::AttributeString(Attr));
switch (Attr) {
+ case dwarf::DW_AT_abstract_origin:
+ case dwarf::DW_AT_type:
+ case dwarf::DW_AT_friend:
+ case dwarf::DW_AT_specification:
+ case dwarf::DW_AT_import:
+ case dwarf::DW_AT_containing_type: {
+ DIEEntry *E = cast<DIEEntry>(Values[i]);
+ DIE *Origin = E->getEntry();
+ unsigned Addr = Origin->getOffset();
+ if (Form == dwarf::DW_FORM_ref_addr) {
+ assert(!useSplitDwarf() && "TODO: dwo files can't have relocations.");
+ // For DW_FORM_ref_addr, output the offset from beginning of debug info
+ // section. Origin->getOffset() returns the offset from start of the
+ // compile unit.
+ CompileUnit *CU = CUDieMap.lookup(Origin->getCompileUnit());
+ assert(CU && "CUDie should belong to a CU.");
+ Addr += CU->getDebugInfoOffset();
+ if (Asm->MAI->doesDwarfUseRelocationsAcrossSections())
+ Asm->EmitLabelPlusOffset(DwarfInfoSectionSym, Addr,
+ DIEEntry::getRefAddrSize(Asm));
+ else
+ Asm->EmitLabelOffsetDifference(DwarfInfoSectionSym, Addr,
+ DwarfInfoSectionSym,
+ DIEEntry::getRefAddrSize(Asm));
+ } else {
+ // Make sure Origin belong to the same CU.
+ assert(Die->getCompileUnit() == Origin->getCompileUnit() &&
+ "The referenced DIE should belong to the same CU in ref4");
+ Asm->EmitInt32(Addr);
+ }
+ break;
+ }
case dwarf::DW_AT_ranges: {
// DW_AT_range Value encodes offset in debug_range section.
DIEInteger *V = cast<DIEInteger>(Values[i]);
case dwarf::DW_AT_location: {
if (DIELabel *L = dyn_cast<DIELabel>(Values[i])) {
if (Asm->MAI->doesDwarfUseRelocationsAcrossSections())
- Asm->EmitLabelReference(L->getValue(), 4);
+ Asm->EmitSectionOffset(L->getValue(), DwarfDebugLocSectionSym);
else
Asm->EmitLabelDifference(L->getValue(), DwarfDebugLocSectionSym, 4);
} else {
TheCU->getUniqueID()));
// Emit size of content not including length itself
- unsigned ContentSize = Die->getSize() +
- sizeof(int16_t) + // DWARF version number
- sizeof(int32_t) + // Offset Into Abbrev. Section
- sizeof(int8_t); // Pointer Size (in bytes)
+ Asm->OutStreamer.AddComment("Length of Unit");
+ Asm->EmitInt32(TheCU->getHeaderSize() + Die->getSize());
- Asm->OutStreamer.AddComment("Length of Compilation Unit Info");
- Asm->EmitInt32(ContentSize);
- Asm->OutStreamer.AddComment("DWARF version number");
- Asm->EmitInt16(DD->getDwarfVersion());
- Asm->OutStreamer.AddComment("Offset Into Abbrev. Section");
- Asm->EmitSectionOffset(Asm->GetTempSymbol(ASection->getLabelBeginName()),
- ASectionSym);
- Asm->OutStreamer.AddComment("Address Size (in bytes)");
- Asm->EmitInt8(Asm->getDataLayout().getPointerSize());
+ TheCU->emitHeader(ASection, ASectionSym);
DD->emitDIE(Die, Abbreviations);
Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol(USection->getLabelEndName(),
Asm, this, &SkeletonHolder);
NewCU->addLocalString(Die, dwarf::DW_AT_GNU_dwo_name,
- DICompileUnit(CU->getNode()).getSplitDebugFilename());
+ CU->getNode().getSplitDebugFilename());
// Relocate to the beginning of the addr_base section, else 0 for the
// beginning of the one for this compile unit.