DwarfCompileUnit::DwarfCompileUnit(unsigned UID, DICompileUnit Node,
AsmPrinter *A, DwarfDebug *DW,
DwarfFile *DWU)
- : DwarfUnit(UID, dwarf::DW_TAG_compile_unit, Node, A, DW, DWU) {
+ : DwarfUnit(UID, dwarf::DW_TAG_compile_unit, Node, A, DW, DWU),
+ Skeleton(nullptr), LabelBegin(nullptr), BaseAddress(nullptr) {
insertDIE(Node, &getUnitDie());
}
DD->getLabelAfterInsn(R.second)));
// Add the range list to the set of ranges to be emitted.
- addRangeList(std::move(List));
+ (Skeleton ? Skeleton : this)->CURangeLists.push_back(std::move(List));
}
void DwarfCompileUnit::attachRangesOrLowHighPC(
}
}
+void DwarfCompileUnit::emitHeader(const MCSymbol *ASectionSym) const {
+ // Don't bother labeling the .dwo unit, as its offset isn't used.
+ if (!Skeleton)
+ Asm->OutStreamer.EmitLabel(LabelBegin);
+
+ DwarfUnit::emitHeader(ASectionSym);
+}
+
+/// addGlobalName - Add a new global name to the compile unit.
+void DwarfCompileUnit::addGlobalName(StringRef Name, DIE &Die,
+ DIScope Context) {
+ if (getCUNode().getEmissionKind() == DIBuilder::LineTablesOnly)
+ return;
+ std::string FullName = getParentContextString(Context) + Name.str();
+ GlobalNames[FullName] = &Die;
+}
+
+/// Add a new global type to the unit.
+void DwarfCompileUnit::addGlobalType(DIType Ty, const DIE &Die,
+ DIScope Context) {
+ if (getCUNode().getEmissionKind() == DIBuilder::LineTablesOnly)
+ return;
+ std::string FullName = getParentContextString(Context) + Ty.getName().str();
+ GlobalTypes[FullName] = &Die;
+}
+
+/// addVariableAddress - Add DW_AT_location attribute for a
+/// DbgVariable based on provided MachineLocation.
+void DwarfCompileUnit::addVariableAddress(const DbgVariable &DV, DIE &Die,
+ MachineLocation Location) {
+ if (DV.variableHasComplexAddress())
+ addComplexAddress(DV, Die, dwarf::DW_AT_location, Location);
+ else if (DV.isBlockByrefVariable())
+ addBlockByrefAddress(DV, Die, dwarf::DW_AT_location, Location);
+ else
+ addAddress(Die, dwarf::DW_AT_location, Location,
+ DV.getVariable().isIndirect());
+}
+
+/// Add an address attribute to a die based on the location provided.
+void DwarfCompileUnit::addAddress(DIE &Die, dwarf::Attribute Attribute,
+ const MachineLocation &Location,
+ bool Indirect) {
+ DIELoc *Loc = new (DIEValueAllocator) DIELoc();
+
+ if (Location.isReg() && !Indirect)
+ addRegisterOpPiece(*Loc, Location.getReg());
+ else {
+ addRegisterOffset(*Loc, Location.getReg(), Location.getOffset());
+ if (Indirect && !Location.isReg()) {
+ addUInt(*Loc, dwarf::DW_FORM_data1, dwarf::DW_OP_deref);
+ }
+ }
+
+ // Now attach the location information to the DIE.
+ addBlock(Die, Attribute, Loc);
+}
+
+/// Start with the address based on the location provided, and generate the
+/// DWARF information necessary to find the actual variable given the extra
+/// address information encoded in the DbgVariable, starting from the starting
+/// location. Add the DWARF information to the die.
+void DwarfCompileUnit::addComplexAddress(const DbgVariable &DV, DIE &Die,
+ dwarf::Attribute Attribute,
+ const MachineLocation &Location) {
+ DIELoc *Loc = new (DIEValueAllocator) DIELoc();
+ unsigned N = DV.getNumAddrElements();
+ unsigned i = 0;
+ if (Location.isReg()) {
+ if (N >= 2 && DV.getAddrElement(0) == dwarf::DW_OP_plus) {
+ assert(!DV.getVariable().isIndirect() &&
+ "double indirection not handled");
+ // If first address element is OpPlus then emit
+ // DW_OP_breg + Offset instead of DW_OP_reg + Offset.
+ addRegisterOffset(*Loc, Location.getReg(), DV.getAddrElement(1));
+ i = 2;
+ } else if (N >= 2 && DV.getAddrElement(0) == dwarf::DW_OP_deref) {
+ assert(!DV.getVariable().isIndirect() &&
+ "double indirection not handled");
+ addRegisterOpPiece(*Loc, Location.getReg(),
+ DV.getExpression().getPieceSize(),
+ DV.getExpression().getPieceOffset());
+ i = 3;
+ } else
+ addRegisterOpPiece(*Loc, Location.getReg());
+ } else
+ addRegisterOffset(*Loc, Location.getReg(), Location.getOffset());
+
+ for (; i < N; ++i) {
+ uint64_t Element = DV.getAddrElement(i);
+ if (Element == dwarf::DW_OP_plus) {
+ addUInt(*Loc, dwarf::DW_FORM_data1, dwarf::DW_OP_plus_uconst);
+ addUInt(*Loc, dwarf::DW_FORM_udata, DV.getAddrElement(++i));
+
+ } else if (Element == dwarf::DW_OP_deref) {
+ if (!Location.isReg())
+ addUInt(*Loc, dwarf::DW_FORM_data1, dwarf::DW_OP_deref);
+
+ } else if (Element == dwarf::DW_OP_piece) {
+ const unsigned SizeOfByte = 8;
+ unsigned PieceOffsetInBits = DV.getAddrElement(++i) * SizeOfByte;
+ unsigned PieceSizeInBits = DV.getAddrElement(++i) * SizeOfByte;
+ // Emit DW_OP_bit_piece Size Offset.
+ assert(PieceSizeInBits > 0 && "piece has zero size");
+ addUInt(*Loc, dwarf::DW_FORM_data1, dwarf::DW_OP_bit_piece);
+ addUInt(*Loc, dwarf::DW_FORM_udata, PieceSizeInBits);
+ addUInt(*Loc, dwarf::DW_FORM_udata, PieceOffsetInBits);
+ } else
+ llvm_unreachable("unknown DIBuilder Opcode");
+ }
+
+ // Now attach the location information to the DIE.
+ addBlock(Die, Attribute, Loc);
+}
+
+/// Add a Dwarf loclistptr attribute data and value.
+void DwarfCompileUnit::addLocationList(DIE &Die, dwarf::Attribute Attribute,
+ unsigned Index) {
+ DIEValue *Value = new (DIEValueAllocator) DIELocList(Index);
+ dwarf::Form Form = DD->getDwarfVersion() >= 4 ? dwarf::DW_FORM_sec_offset
+ : dwarf::DW_FORM_data4;
+ Die.addValue(Attribute, Form, Value);
+}
+
+void DwarfCompileUnit::applyVariableAttributes(const DbgVariable &Var,
+ DIE &VariableDie) {
+ StringRef Name = Var.getName();
+ if (!Name.empty())
+ addString(VariableDie, dwarf::DW_AT_name, Name);
+ addSourceLine(VariableDie, Var.getVariable());
+ addType(VariableDie, Var.getType());
+ if (Var.isArtificial())
+ addFlag(VariableDie, dwarf::DW_AT_artificial);
+}
+
+/// Add a Dwarf expression attribute data and value.
+void DwarfCompileUnit::addExpr(DIELoc &Die, dwarf::Form Form,
+ const MCExpr *Expr) {
+ DIEValue *Value = new (DIEValueAllocator) DIEExpr(Expr);
+ Die.addValue((dwarf::Attribute)0, Form, Value);
+}
+
+void DwarfCompileUnit::applySubprogramAttributesToDefinition(DISubprogram SP,
+ DIE &SPDie) {
+ DISubprogram SPDecl = SP.getFunctionDeclaration();
+ DIScope Context = resolve(SPDecl ? SPDecl.getContext() : SP.getContext());
+ applySubprogramAttributes(SP, SPDie, getCUNode().getEmissionKind() ==
+ DIBuilder::LineTablesOnly);
+ addGlobalName(SP.getName(), SPDie, Context);
+}
+
+bool DwarfCompileUnit::isDwoUnit() const {
+ return DD->useSplitDwarf() && Skeleton;
+}
} // end llvm namespace
projects / oota-llvm.git / blobdiff