diff options
Diffstat (limited to 'lib/CodeGen/AsmPrinter')
| -rw-r--r-- | lib/CodeGen/AsmPrinter/ARMException.cpp | 4 | ||||
| -rw-r--r-- | lib/CodeGen/AsmPrinter/AsmPrinter.cpp | 188 | ||||
| -rw-r--r-- | lib/CodeGen/AsmPrinter/AsmPrinterDwarf.cpp | 118 | ||||
| -rw-r--r-- | lib/CodeGen/AsmPrinter/CMakeLists.txt | 3 | ||||
| -rw-r--r-- | lib/CodeGen/AsmPrinter/DwarfCFIException.cpp | 104 | ||||
| -rw-r--r-- | lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp | 1054 | ||||
| -rw-r--r-- | lib/CodeGen/AsmPrinter/DwarfCompileUnit.h | 280 | ||||
| -rw-r--r-- | lib/CodeGen/AsmPrinter/DwarfDebug.cpp | 1975 | ||||
| -rw-r--r-- | lib/CodeGen/AsmPrinter/DwarfDebug.h | 250 | ||||
| -rw-r--r-- | lib/CodeGen/AsmPrinter/DwarfException.h | 76 | ||||
| -rw-r--r-- | lib/CodeGen/AsmPrinter/DwarfTableException.cpp | 349 | ||||
| -rw-r--r-- | lib/CodeGen/AsmPrinter/Win64Exception.cpp | 116 |
12 files changed, 2179 insertions, 2338 deletions
diff --git a/lib/CodeGen/AsmPrinter/ARMException.cpp b/lib/CodeGen/AsmPrinter/ARMException.cpp index 0db28a6..5861fa4 100644 --- a/lib/CodeGen/AsmPrinter/ARMException.cpp +++ b/lib/CodeGen/AsmPrinter/ARMException.cpp @@ -52,7 +52,7 @@ void ARMException::EndModule() { /// being emitted immediately after the function entry point. void ARMException::BeginFunction(const MachineFunction *MF) { Asm->OutStreamer.EmitFnStart(); - if (!Asm->MF->getFunction()->doesNotThrow() || UnwindTablesMandatory) + if (Asm->MF->getFunction()->needsUnwindTableEntry()) Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("eh_func_begin", Asm->getFunctionNumber())); } @@ -60,7 +60,7 @@ void ARMException::BeginFunction(const MachineFunction *MF) { /// EndFunction - Gather and emit post-function exception information. /// void ARMException::EndFunction() { - if (Asm->MF->getFunction()->doesNotThrow() && !UnwindTablesMandatory) + if (!Asm->MF->getFunction()->needsUnwindTableEntry()) Asm->OutStreamer.EmitCantUnwind(); else { Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("eh_func_end", diff --git a/lib/CodeGen/AsmPrinter/AsmPrinter.cpp b/lib/CodeGen/AsmPrinter/AsmPrinter.cpp index 61f5672..b544ff1 100644 --- a/lib/CodeGen/AsmPrinter/AsmPrinter.cpp +++ b/lib/CodeGen/AsmPrinter/AsmPrinter.cpp @@ -35,10 +35,12 @@ #include "llvm/MC/MCStreamer.h" #include "llvm/MC/MCSymbol.h" #include "llvm/Target/Mangler.h" +#include "llvm/Target/TargetAsmInfo.h" #include "llvm/Target/TargetData.h" #include "llvm/Target/TargetInstrInfo.h" #include "llvm/Target/TargetLowering.h" #include "llvm/Target/TargetLoweringObjectFile.h" +#include "llvm/Target/TargetOptions.h" #include "llvm/Target/TargetRegisterInfo.h" #include "llvm/Assembly/Writer.h" #include "llvm/ADT/SmallString.h" @@ -191,22 +193,25 @@ bool AsmPrinter::doInitialization(Module &M) { if (MAI->doesSupportDebugInformation()) DD = new DwarfDebug(this, &M); - if (MAI->doesSupportExceptionHandling()) - switch (MAI->getExceptionHandlingType()) { - default: - case ExceptionHandling::DwarfTable: - DE = new DwarfTableException(this); - break; - case ExceptionHandling::DwarfCFI: - DE = new DwarfCFIException(this); - break; - case ExceptionHandling::ARM: - DE = new ARMException(this); - break; - } + switch (MAI->getExceptionHandlingType()) { + case ExceptionHandling::None: + return false; + case ExceptionHandling::SjLj: + case ExceptionHandling::DwarfCFI: + DE = new DwarfCFIException(this); + return false; + case ExceptionHandling::ARM: + DE = new ARMException(this); + return false; + case ExceptionHandling::Win64: + DE = new Win64Exception(this); + return false; + } +#else + return false; #endif // ANDROID_TARGET_BUILD - return false; + llvm_unreachable("Unknown exception type."); } void AsmPrinter::EmitLinkage(unsigned Linkage, MCSymbol *GVSym) const { @@ -271,7 +276,7 @@ void AsmPrinter::EmitGlobalVariable(const GlobalVariable *GV) { } MCSymbol *GVSym = Mang->getSymbol(GV); - EmitVisibility(GVSym, GV->getVisibility()); + EmitVisibility(GVSym, GV->getVisibility(), !GV->isDeclaration()); if (!GV->hasInitializer()) // External globals require no extra code. return; @@ -293,12 +298,6 @@ void AsmPrinter::EmitGlobalVariable(const GlobalVariable *GV) { if (GVKind.isCommon() || GVKind.isBSSLocal()) { if (Size == 0) Size = 1; // .comm Foo, 0 is undefined, avoid it. - if (isVerbose()) { - WriteAsOperand(OutStreamer.GetCommentOS(), GV, - /*PrintType=*/false, GV->getParent()); - OutStreamer.GetCommentOS() << '\n'; - } - // Handle common symbols. if (GVKind.isCommon()) { unsigned Align = 1 << AlignLog; @@ -492,39 +491,11 @@ void AsmPrinter::EmitFunctionEntryLabel() { } -static void EmitDebugLoc(DebugLoc DL, const MachineFunction *MF, - raw_ostream &CommentOS) { - const LLVMContext &Ctx = MF->getFunction()->getContext(); - if (!DL.isUnknown()) { // Print source line info. - DIScope Scope(DL.getScope(Ctx)); - // Omit the directory, because it's likely to be long and uninteresting. - if (Scope.Verify()) - CommentOS << Scope.getFilename(); - else - CommentOS << "<unknown>"; - CommentOS << ':' << DL.getLine(); - if (DL.getCol() != 0) - CommentOS << ':' << DL.getCol(); - DebugLoc InlinedAtDL = DebugLoc::getFromDILocation(DL.getInlinedAt(Ctx)); - if (!InlinedAtDL.isUnknown()) { - CommentOS << "[ "; - EmitDebugLoc(InlinedAtDL, MF, CommentOS); - CommentOS << " ]"; - } - } -} - /// EmitComments - Pretty-print comments for instructions. static void EmitComments(const MachineInstr &MI, raw_ostream &CommentOS) { const MachineFunction *MF = MI.getParent()->getParent(); const TargetMachine &TM = MF->getTarget(); - DebugLoc DL = MI.getDebugLoc(); - if (!DL.isUnknown()) { // Print source line info. - EmitDebugLoc(DL, MF, CommentOS); - CommentOS << '\n'; - } - // Check for spills and reloads int FI; @@ -631,6 +602,45 @@ static bool EmitDebugValueComment(const MachineInstr *MI, AsmPrinter &AP) { return true; } +AsmPrinter::CFIMoveType AsmPrinter::needsCFIMoves() { + if (MAI->getExceptionHandlingType() == ExceptionHandling::DwarfCFI && + MF->getFunction()->needsUnwindTableEntry()) + return CFI_M_EH; + + if (MMI->hasDebugInfo()) + return CFI_M_Debug; + + return CFI_M_None; +} + +bool AsmPrinter::needsSEHMoves() { + return MAI->getExceptionHandlingType() == ExceptionHandling::Win64 && + MF->getFunction()->needsUnwindTableEntry(); +} + +void AsmPrinter::emitPrologLabel(const MachineInstr &MI) { + MCSymbol *Label = MI.getOperand(0).getMCSymbol(); + + if (MAI->getExceptionHandlingType() != ExceptionHandling::DwarfCFI) + return; + + if (needsCFIMoves() == CFI_M_None) + return; + + MachineModuleInfo &MMI = MF->getMMI(); + std::vector<MachineMove> &Moves = MMI.getFrameMoves(); + bool FoundOne = false; + (void)FoundOne; + for (std::vector<MachineMove>::iterator I = Moves.begin(), + E = Moves.end(); I != E; ++I) { + if (I->getLabel() == Label) { + EmitCFIFrameMove(*I); + FoundOne = true; + } + } + assert(FoundOne); +} + /// EmitFunctionBody - This method emits the body and trailer for a /// function. void AsmPrinter::EmitFunctionBody() { @@ -669,6 +679,9 @@ void AsmPrinter::EmitFunctionBody() { switch (II->getOpcode()) { case TargetOpcode::PROLOG_LABEL: + emitPrologLabel(*II); + break; + case TargetOpcode::EH_LABEL: case TargetOpcode::GC_LABEL: OutStreamer.EmitLabel(II->getOperand(0).getMCSymbol()); @@ -689,6 +702,9 @@ void AsmPrinter::EmitFunctionBody() { if (isVerbose()) EmitKill(II, *this); break; default: + if (!TM.hasMCUseLoc()) + MCLineEntry::Make(&OutStreamer, getCurrentSection()); + EmitInstruction(II); break; } @@ -767,6 +783,53 @@ getDebugValueLocation(const MachineInstr *MI) const { return MachineLocation(); } +/// EmitDwarfRegOp - Emit dwarf register operation. +void AsmPrinter::EmitDwarfRegOp(const MachineLocation &MLoc) const { + const TargetRegisterInfo *TRI = TM.getRegisterInfo(); + int Reg = TRI->getDwarfRegNum(MLoc.getReg(), false); + + for (const unsigned *SR = TRI->getSuperRegisters(MLoc.getReg()); + *SR && Reg < 0; ++SR) { + Reg = TRI->getDwarfRegNum(*SR, false); + // FIXME: Get the bit range this register uses of the superregister + // so that we can produce a DW_OP_bit_piece + } + + // FIXME: Handle cases like a super register being encoded as + // DW_OP_reg 32 DW_OP_piece 4 DW_OP_reg 33 + + // FIXME: We have no reasonable way of handling errors in here. The + // caller might be in the middle of an dwarf expression. We should + // probably assert that Reg >= 0 once debug info generation is more mature. + + if (int Offset = MLoc.getOffset()) { + if (Reg < 32) { + OutStreamer.AddComment( + dwarf::OperationEncodingString(dwarf::DW_OP_breg0 + Reg)); + EmitInt8(dwarf::DW_OP_breg0 + Reg); + } else { + OutStreamer.AddComment("DW_OP_bregx"); + EmitInt8(dwarf::DW_OP_bregx); + OutStreamer.AddComment(Twine(Reg)); + EmitULEB128(Reg); + } + EmitSLEB128(Offset); + } else { + if (Reg < 32) { + OutStreamer.AddComment( + dwarf::OperationEncodingString(dwarf::DW_OP_reg0 + Reg)); + EmitInt8(dwarf::DW_OP_reg0 + Reg); + } else { + OutStreamer.AddComment("DW_OP_regx"); + EmitInt8(dwarf::DW_OP_regx); + OutStreamer.AddComment(Twine(Reg)); + EmitULEB128(Reg); + } + } + + // FIXME: Produce a DW_OP_bit_piece if we used a superregister +} + bool AsmPrinter::doFinalization(Module &M) { // Emit global variables. for (Module::const_global_iterator I = M.global_begin(), E = M.global_end(); @@ -1879,7 +1942,7 @@ isBlockOnlyReachableByFallthrough(const MachineBasicBlock *MBB) const { return false; // The predecessor has to be immediately before this block. - const MachineBasicBlock *Pred = *PI; + MachineBasicBlock *Pred = *PI; if (!Pred->isLayoutSuccessor(MBB)) return false; @@ -1888,9 +1951,28 @@ isBlockOnlyReachableByFallthrough(const MachineBasicBlock *MBB) const { if (Pred->empty()) return true; - // Otherwise, check the last instruction. - const MachineInstr &LastInst = Pred->back(); - return !LastInst.getDesc().isBarrier(); + // Check the terminators in the previous blocks + for (MachineBasicBlock::iterator II = Pred->getFirstTerminator(), + IE = Pred->end(); II != IE; ++II) { + MachineInstr &MI = *II; + + // If it is not a simple branch, we are in a table somewhere. + if (!MI.getDesc().isBranch() || MI.getDesc().isIndirectBranch()) + return false; + + // If we are the operands of one of the branches, this is not + // a fall through. + for (MachineInstr::mop_iterator OI = MI.operands_begin(), + OE = MI.operands_end(); OI != OE; ++OI) { + const MachineOperand& OP = *OI; + if (OP.isJTI()) + return false; + if (OP.isMBB() && OP.getMBB() == MBB) + return false; + } + } + + return true; } diff --git a/lib/CodeGen/AsmPrinter/AsmPrinterDwarf.cpp b/lib/CodeGen/AsmPrinter/AsmPrinterDwarf.cpp index 9c8184a..dd5b0e2 100644 --- a/lib/CodeGen/AsmPrinter/AsmPrinterDwarf.cpp +++ b/lib/CodeGen/AsmPrinter/AsmPrinterDwarf.cpp @@ -155,7 +155,7 @@ void AsmPrinter::EmitReference(const MCSymbol *Sym, unsigned Encoding) const { const TargetLoweringObjectFile &TLOF = getObjFileLowering(); const MCExpr *Exp = - TLOF.getExprForDwarfReference(Sym, Mang, MMI, Encoding, OutStreamer); + TLOF.getExprForDwarfReference(Sym, Encoding, OutStreamer); OutStreamer.EmitAbsValue(Exp, GetSizeOfEncodedValue(Encoding)); } @@ -206,108 +206,28 @@ void AsmPrinter::EmitSectionOffset(const MCSymbol *Label, // Dwarf Lowering Routines //===----------------------------------------------------------------------===// - -/// EmitFrameMoves - Emit frame instructions to describe the layout of the -/// frame. -void AsmPrinter::EmitFrameMoves(const std::vector<MachineMove> &Moves, - MCSymbol *BaseLabel, bool isEH) const { - const TargetRegisterInfo *RI = TM.getRegisterInfo(); - - int stackGrowth = TM.getTargetData()->getPointerSize(); - if (TM.getFrameLowering()->getStackGrowthDirection() != - TargetFrameLowering::StackGrowsUp) - stackGrowth *= -1; - - for (unsigned i = 0, N = Moves.size(); i < N; ++i) { - const MachineMove &Move = Moves[i]; - MCSymbol *Label = Move.getLabel(); - // Throw out move if the label is invalid. - if (Label && !Label->isDefined()) continue; // Not emitted, in dead code. - - const MachineLocation &Dst = Move.getDestination(); - const MachineLocation &Src = Move.getSource(); - - // Advance row if new location. - if (BaseLabel && Label) { - MCSymbol *ThisSym = Label; - if (ThisSym != BaseLabel) { - EmitCFAByte(dwarf::DW_CFA_advance_loc4); - EmitLabelDifference(ThisSym, BaseLabel, 4); - BaseLabel = ThisSym; - } - } - - // If advancing cfa. - if (Dst.isReg() && Dst.getReg() == MachineLocation::VirtualFP) { - assert(!Src.isReg() && "Machine move not supported yet."); - - if (Src.getReg() == MachineLocation::VirtualFP) { - EmitCFAByte(dwarf::DW_CFA_def_cfa_offset); - } else { - EmitCFAByte(dwarf::DW_CFA_def_cfa); - EmitULEB128(RI->getDwarfRegNum(Src.getReg(), isEH), "Register"); - } - - EmitULEB128(-Src.getOffset(), "Offset"); - continue; - } - - if (Src.isReg() && Src.getReg() == MachineLocation::VirtualFP) { - assert(Dst.isReg() && "Machine move not supported yet."); - EmitCFAByte(dwarf::DW_CFA_def_cfa_register); - EmitULEB128(RI->getDwarfRegNum(Dst.getReg(), isEH), "Register"); - continue; - } - - unsigned Reg = RI->getDwarfRegNum(Src.getReg(), isEH); - int Offset = Dst.getOffset() / stackGrowth; - - if (Offset < 0) { - EmitCFAByte(dwarf::DW_CFA_offset_extended_sf); - EmitULEB128(Reg, "Reg"); - EmitSLEB128(Offset, "Offset"); - } else if (Reg < 64) { - EmitCFAByte(dwarf::DW_CFA_offset + Reg); - EmitULEB128(Offset, "Offset"); - } else { - EmitCFAByte(dwarf::DW_CFA_offset_extended); - EmitULEB128(Reg, "Reg"); - EmitULEB128(Offset, "Offset"); - } - } -} - -/// EmitFrameMoves - Emit frame instructions to describe the layout of the -/// frame. -void AsmPrinter::EmitCFIFrameMoves(const std::vector<MachineMove> &Moves) const { +/// EmitCFIFrameMove - Emit a frame instruction. +void AsmPrinter::EmitCFIFrameMove(const MachineMove &Move) const { const TargetRegisterInfo *RI = TM.getRegisterInfo(); - for (unsigned i = 0, N = Moves.size(); i < N; ++i) { - const MachineMove &Move = Moves[i]; - MCSymbol *Label = Move.getLabel(); - // Throw out move if the label is invalid. - if (Label && !Label->isDefined()) continue; // Not emitted, in dead code. - - const MachineLocation &Dst = Move.getDestination(); - const MachineLocation &Src = Move.getSource(); - - // If advancing cfa. - if (Dst.isReg() && Dst.getReg() == MachineLocation::VirtualFP) { - assert(!Src.isReg() && "Machine move not supported yet."); + const MachineLocation &Dst = Move.getDestination(); + const MachineLocation &Src = Move.getSource(); - if (Src.getReg() == MachineLocation::VirtualFP) { - OutStreamer.EmitCFIDefCfaOffset(-Src.getOffset()); - } else { - assert("Machine move not supported yet"); - // Reg + Offset - } - } else if (Src.isReg() && Src.getReg() == MachineLocation::VirtualFP) { - assert(Dst.isReg() && "Machine move not supported yet."); - OutStreamer.EmitCFIDefCfaRegister(RI->getDwarfRegNum(Dst.getReg(), true)); + // If advancing cfa. + if (Dst.isReg() && Dst.getReg() == MachineLocation::VirtualFP) { + if (Src.getReg() == MachineLocation::VirtualFP) { + OutStreamer.EmitCFIDefCfaOffset(-Src.getOffset()); } else { - assert(!Dst.isReg() && "Machine move not supported yet."); - OutStreamer.EmitCFIOffset(RI->getDwarfRegNum(Src.getReg(), true), - Dst.getOffset()); + // Reg + Offset + OutStreamer.EmitCFIDefCfa(RI->getDwarfRegNum(Src.getReg(), true), + Src.getOffset()); } + } else if (Src.isReg() && Src.getReg() == MachineLocation::VirtualFP) { + assert(Dst.isReg() && "Machine move not supported yet."); + OutStreamer.EmitCFIDefCfaRegister(RI->getDwarfRegNum(Dst.getReg(), true)); + } else { + assert(!Dst.isReg() && "Machine move not supported yet."); + OutStreamer.EmitCFIOffset(RI->getDwarfRegNum(Src.getReg(), true), + Dst.getOffset()); } } diff --git a/lib/CodeGen/AsmPrinter/CMakeLists.txt b/lib/CodeGen/AsmPrinter/CMakeLists.txt index 1377e4d..4da7876 100644 --- a/lib/CodeGen/AsmPrinter/CMakeLists.txt +++ b/lib/CodeGen/AsmPrinter/CMakeLists.txt @@ -5,9 +5,10 @@ add_llvm_library(LLVMAsmPrinter AsmPrinterInlineAsm.cpp DIE.cpp DwarfCFIException.cpp + DwarfCompileUnit.cpp DwarfDebug.cpp DwarfException.cpp - DwarfTableException.cpp OcamlGCPrinter.cpp + Win64Exception.cpp ) diff --git a/lib/CodeGen/AsmPrinter/DwarfCFIException.cpp b/lib/CodeGen/AsmPrinter/DwarfCFIException.cpp index 68be2ee..91b7d08 100644 --- a/lib/CodeGen/AsmPrinter/DwarfCFIException.cpp +++ b/lib/CodeGen/AsmPrinter/DwarfCFIException.cpp @@ -32,6 +32,7 @@ #include "llvm/Target/TargetOptions.h" #include "llvm/Target/TargetRegisterInfo.h" #include "llvm/Support/Dwarf.h" +#include "llvm/Support/ErrorHandling.h" #include "llvm/Support/FormattedStream.h" #include "llvm/ADT/SmallString.h" #include "llvm/ADT/StringExtras.h" @@ -40,92 +41,105 @@ using namespace llvm; DwarfCFIException::DwarfCFIException(AsmPrinter *A) : DwarfException(A), - shouldEmitTable(false), shouldEmitMoves(false), shouldEmitTableModule(false) - {} + shouldEmitPersonality(false), shouldEmitLSDA(false), shouldEmitMoves(false), + moveTypeModule(AsmPrinter::CFI_M_None) {} DwarfCFIException::~DwarfCFIException() {} /// EndModule - Emit all exception information that should come after the /// content. void DwarfCFIException::EndModule() { - if (!Asm->MAI->isExceptionHandlingDwarf()) - return; + if (moveTypeModule == AsmPrinter::CFI_M_Debug) + Asm->OutStreamer.EmitCFISections(false, true); - if (!shouldEmitTableModule) + if (!Asm->MAI->isExceptionHandlingDwarf()) return; const TargetLoweringObjectFile &TLOF = Asm->getObjFileLowering(); + unsigned PerEncoding = TLOF.getPersonalityEncoding(); - // Begin eh frame section. - Asm->OutStreamer.SwitchSection(TLOF.getEHFrameSection()); + if ((PerEncoding & 0x70) != dwarf::DW_EH_PE_pcrel) + return; // Emit references to all used personality functions + bool AtLeastOne = false; const std::vector<const Function*> &Personalities = MMI->getPersonalities(); for (size_t i = 0, e = Personalities.size(); i != e; ++i) { - Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("personality", i)); - Asm->EmitReference(Personalities[i], PerEncoding); + if (!Personalities[i]) + continue; + MCSymbol *Sym = Asm->Mang->getSymbol(Personalities[i]); + TLOF.emitPersonalityValue(Asm->OutStreamer, Asm->TM, Sym); + AtLeastOne = true; + } + + if (AtLeastOne && !TLOF.isFunctionEHFrameSymbolPrivate()) { + // This is a temporary hack to keep sections in the same order they + // were before. This lets us produce bit identical outputs while + // transitioning to CFI. + Asm->OutStreamer.SwitchSection(TLOF.getEHFrameSection()); } } /// BeginFunction - Gather pre-function exception information. Assumes it's /// being emitted immediately after the function entry point. void DwarfCFIException::BeginFunction(const MachineFunction *MF) { - shouldEmitTable = shouldEmitMoves = false; + shouldEmitMoves = shouldEmitPersonality = shouldEmitLSDA = false; // If any landing pads survive, we need an EH table. - shouldEmitTable = !MMI->getLandingPads().empty(); + bool hasLandingPads = !MMI->getLandingPads().empty(); // See if we need frame move info. - shouldEmitMoves = - !Asm->MF->getFunction()->doesNotThrow() || UnwindTablesMandatory; + AsmPrinter::CFIMoveType MoveType = Asm->needsCFIMoves(); + if (MoveType == AsmPrinter::CFI_M_EH || + (MoveType == AsmPrinter::CFI_M_Debug && + moveTypeModule == AsmPrinter::CFI_M_None)) + moveTypeModule = MoveType; - if (shouldEmitMoves || shouldEmitTable) - // Assumes in correct section after the entry point. - Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("eh_func_begin", - Asm->getFunctionNumber())); + shouldEmitMoves = MoveType != AsmPrinter::CFI_M_None; - shouldEmitTableModule |= shouldEmitTable; + const TargetLoweringObjectFile &TLOF = Asm->getObjFileLowering(); + unsigned PerEncoding = TLOF.getPersonalityEncoding(); + const Function *Per = MMI->getPersonalities()[MMI->getPersonalityIndex()]; - if (shouldEmitMoves) { - const TargetFrameLowering *TFL = Asm->TM.getFrameLowering(); - Asm->OutStreamer.EmitCFIStartProc(); + shouldEmitPersonality = hasLandingPads && + PerEncoding != dwarf::DW_EH_PE_omit && Per; - // Indicate locations of general callee saved registers in frame. - std::vector<MachineMove> Moves; - TFL->getInitialFrameState(Moves); - Asm->EmitCFIFrameMoves(Moves); - Asm->EmitCFIFrameMoves(MMI->getFrameMoves()); - } + unsigned LSDAEncoding = TLOF.getLSDAEncoding(); + shouldEmitLSDA = shouldEmitPersonality && + LSDAEncoding != dwarf::DW_EH_PE_omit; - if (!shouldEmitTable) + if (!shouldEmitPersonality && !shouldEmitMoves) return; - const TargetLoweringObjectFile &TLOF = Asm->getObjFileLowering(); + Asm->OutStreamer.EmitCFIStartProc(); + + // Indicate personality routine, if any. + if (!shouldEmitPersonality) + return; + + const MCSymbol *Sym = TLOF.getCFIPersonalitySymbol(Per, Asm->Mang, MMI); + Asm->OutStreamer.EmitCFIPersonality(Sym, PerEncoding); + + Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("eh_func_begin", + Asm->getFunctionNumber())); // Provide LSDA information. - unsigned LSDAEncoding = TLOF.getLSDAEncoding(); - if (LSDAEncoding != dwarf::DW_EH_PE_omit) - Asm->OutStreamer.EmitCFILsda(Asm->GetTempSymbol("exception", - Asm->getFunctionNumber()), - LSDAEncoding); + if (!shouldEmitLSDA) + return; - // Indicate personality routine, if any. - unsigned PerEncoding = TLOF.getPersonalityEncoding(); - if (PerEncoding != dwarf::DW_EH_PE_omit && - MMI->getPersonalities()[MMI->getPersonalityIndex()]) - Asm->OutStreamer.EmitCFIPersonality(Asm->GetTempSymbol("personality", - MMI->getPersonalityIndex()), - PerEncoding); + Asm->OutStreamer.EmitCFILsda(Asm->GetTempSymbol("exception", + Asm->getFunctionNumber()), + LSDAEncoding); } /// EndFunction - Gather and emit post-function exception information. /// void DwarfCFIException::EndFunction() { - if (!shouldEmitMoves && !shouldEmitTable) return; + if (!shouldEmitPersonality && !shouldEmitMoves) + return; - if (shouldEmitMoves) - Asm->OutStreamer.EmitCFIEndProc(); + Asm->OutStreamer.EmitCFIEndProc(); Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("eh_func_end", Asm->getFunctionNumber())); @@ -133,6 +147,6 @@ void DwarfCFIException::EndFunction() { // Map all labels and get rid of any dead landing pads. MMI->TidyLandingPads(); - if (shouldEmitTable) + if (shouldEmitPersonality) EmitExceptionTable(); } diff --git a/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp b/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp new file mode 100644 index 0000000..bff1a35 --- /dev/null +++ b/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp @@ -0,0 +1,1054 @@ +//===-- llvm/CodeGen/DwarfCompileUnit.cpp - Dwarf Compile Unit ------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file contains support for writing dwarf compile unit. +// +//===----------------------------------------------------------------------===// + +#define DEBUG_TYPE "dwarfdebug" + +#include "DwarfCompileUnit.h" +#include "DwarfDebug.h" +#include "llvm/Constants.h" +#include "llvm/Analysis/DIBuilder.h" +#include "llvm/Target/TargetData.h" +#include "llvm/Target/TargetFrameLowering.h" +#include "llvm/Target/TargetMachine.h" +#include "llvm/Target/TargetRegisterInfo.h" +#include "llvm/ADT/APFloat.h" +#include "llvm/Support/ErrorHandling.h" + +using namespace llvm; + +/// CompileUnit - Compile unit constructor. +CompileUnit::CompileUnit(unsigned I, DIE *D, AsmPrinter *A, DwarfDebug *DW) + : ID(I), CUDie(D), Asm(A), DD(DW), IndexTyDie(0) { + DIEIntegerOne = new (DIEValueAllocator) DIEInteger(1); +} + +/// ~CompileUnit - Destructor for compile unit. +CompileUnit::~CompileUnit() { + for (unsigned j = 0, M = DIEBlocks.size(); j < M; ++j) + DIEBlocks[j]->~DIEBlock(); +} + +/// createDIEEntry - Creates a new DIEEntry to be a proxy for a debug +/// information entry. +DIEEntry *CompileUnit::createDIEEntry(DIE *Entry) { + DIEEntry *Value = new (DIEValueAllocator) DIEEntry(Entry); + return Value; +} + +/// addUInt - Add an unsigned integer attribute data and value. +/// +void CompileUnit::addUInt(DIE *Die, unsigned Attribute, + unsigned Form, uint64_t Integer) { + if (!Form) Form = DIEInteger::BestForm(false, Integer); + DIEValue *Value = Integer == 1 ? + DIEIntegerOne : new (DIEValueAllocator) DIEInteger(Integer); + Die->addValue(Attribute, Form, Value); +} + +/// addSInt - Add an signed integer attribute data and value. +/// +void CompileUnit::addSInt(DIE *Die, unsigned Attribute, + unsigned Form, int64_t Integer) { + if (!Form) Form = DIEInteger::BestForm(true, Integer); + DIEValue *Value = new (DIEValueAllocator) DIEInteger(Integer); + Die->addValue(Attribute, Form, Value); +} + +/// addString - Add a string attribute data and value. DIEString only +/// keeps string reference. +void CompileUnit::addString(DIE *Die, unsigned Attribute, unsigned Form, + StringRef String) { + DIEValue *Value = new (DIEValueAllocator) DIEString(String); + Die->addValue(Attribute, Form, Value); +} + +/// addLabel - Add a Dwarf label attribute data and value. +/// +void CompileUnit::addLabel(DIE *Die, unsigned Attribute, unsigned Form, + const MCSymbol *Label) { + DIEValue *Value = new (DIEValueAllocator) DIELabel(Label); + Die->addValue(Attribute, Form, Value); +} + +/// addDelta - Add a label delta attribute data and value. +/// +void CompileUnit::addDelta(DIE *Die, unsigned Attribute, unsigned Form, + const MCSymbol *Hi, const MCSymbol *Lo) { + DIEValue *Value = new (DIEValueAllocator) DIEDelta(Hi, Lo); + Die->addValue(Attribute, Form, Value); +} + +/// addDIEEntry - Add a DIE attribute data and value. +/// +void CompileUnit::addDIEEntry(DIE *Die, unsigned Attribute, unsigned Form, + DIE *Entry) { + Die->addValue(Attribute, Form, createDIEEntry(Entry)); +} + + +/// addBlock - Add block data. +/// +void CompileUnit::addBlock(DIE *Die, unsigned Attribute, unsigned Form, + DIEBlock *Block) { + Block->ComputeSize(Asm); + DIEBlocks.push_back(Block); // Memoize so we can call the destructor later on. + Die->addValue(Attribute, Block->BestForm(), Block); +} + +/// addSourceLine - Add location information to specified debug information +/// entry. +void CompileUnit::addSourceLine(DIE *Die, DIVariable V) { + // Verify variable. + if (!V.Verify()) + return; + + unsigned Line = V.getLineNumber(); + if (Line == 0) + return; + unsigned FileID = DD->GetOrCreateSourceID(V.getContext().getFilename(), + V.getContext().getDirectory()); + assert(FileID && "Invalid file id"); + addUInt(Die, dwarf::DW_AT_decl_file, 0, FileID); + addUInt(Die, dwarf::DW_AT_decl_line, 0, Line); +} + +/// addSourceLine - Add location information to specified debug information +/// entry. +void CompileUnit::addSourceLine(DIE *Die, DIGlobalVariable G) { + // Verify global variable. + if (!G.Verify()) + return; + + unsigned Line = G.getLineNumber(); + if (Line == 0) + return; + unsigned FileID = DD->GetOrCreateSourceID(G.getContext().getFilename(), + G.getContext().getDirectory()); + assert(FileID && "Invalid file id"); + addUInt(Die, dwarf::DW_AT_decl_file, 0, FileID); + addUInt(Die, dwarf::DW_AT_decl_line, 0, Line); +} + +/// addSourceLine - Add location information to specified debug information +/// entry. +void CompileUnit::addSourceLine(DIE *Die, DISubprogram SP) { + // Verify subprogram. + if (!SP.Verify()) + return; + // If the line number is 0, don't add it. + if (SP.getLineNumber() == 0) + return; + + unsigned Line = SP.getLineNumber(); + if (!SP.getContext().Verify()) + return; + unsigned FileID = DD->GetOrCreateSourceID(SP.getFilename(), SP.getDirectory()); + assert(FileID && "Invalid file id"); + addUInt(Die, dwarf::DW_AT_decl_file, 0, FileID); + addUInt(Die, dwarf::DW_AT_decl_line, 0, Line); +} + +/// addSourceLine - Add location information to specified debug information +/// entry. +void CompileUnit::addSourceLine(DIE *Die, DIType Ty) { + // Verify type. + if (!Ty.Verify()) + return; + + unsigned Line = Ty.getLineNumber(); + if (Line == 0 || !Ty.getContext().Verify()) + return; + unsigned FileID = DD->GetOrCreateSourceID(Ty.getFilename(), Ty.getDirectory()); + assert(FileID && "Invalid file id"); + addUInt(Die, dwarf::DW_AT_decl_file, 0, FileID); + addUInt(Die, dwarf::DW_AT_decl_line, 0, Line); +} + +/// addSourceLine - Add location information to specified debug information +/// entry. +void CompileUnit::addSourceLine(DIE *Die, DINameSpace NS) { + // Verify namespace. + if (!NS.Verify()) + return; + + unsigned Line = NS.getLineNumber(); + if (Line == 0) + return; + StringRef FN = NS.getFilename(); + + unsigned FileID = DD->GetOrCreateSourceID(FN, NS.getDirectory()); + assert(FileID && "Invalid file id"); + addUInt(Die, dwarf::DW_AT_decl_file, 0, FileID); + addUInt(Die, dwarf::DW_AT_decl_line, 0, Line); +} + +/// addVariableAddress - Add DW_AT_location attribute for a +/// DbgVariable based on provided MachineLocation. +void CompileUnit::addVariableAddress(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); +} + +/// addRegisterOp - Add register operand. +void CompileUnit::addRegisterOp(DIE *TheDie, unsigned Reg) { + const TargetRegisterInfo *RI = Asm->TM.getRegisterInfo(); + unsigned DWReg = RI->getDwarfRegNum(Reg, false); + if (DWReg < 32) + addUInt(TheDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_reg0 + DWReg); + else { + addUInt(TheDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_regx); + addUInt(TheDie, 0, dwarf::DW_FORM_udata, DWReg); + } +} + +/// addRegisterOffset - Add register offset. +void CompileUnit::addRegisterOffset(DIE *TheDie, unsigned Reg, + int64_t Offset) { + const TargetRegisterInfo *RI = Asm->TM.getRegisterInfo(); + unsigned DWReg = RI->getDwarfRegNum(Reg, false); + const TargetRegisterInfo *TRI = Asm->TM.getRegisterInfo(); + if (Reg == TRI->getFrameRegister(*Asm->MF)) + // If variable offset is based in frame register then use fbreg. + addUInt(TheDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_fbreg); + else if (DWReg < 32) + addUInt(TheDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_breg0 + DWReg); + else { + addUInt(TheDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_bregx); + addUInt(TheDie, 0, dwarf::DW_FORM_udata, DWReg); + } + addSInt(TheDie, 0, dwarf::DW_FORM_sdata, Offset); +} + +/// addAddress - Add an address attribute to a die based on the location +/// provided. +void CompileUnit::addAddress(DIE *Die, unsigned Attribute, + const MachineLocation &Location) { + DIEBlock *Block = new (DIEValueAllocator) DIEBlock(); + + if (Location.isReg()) + addRegisterOp(Block, Location.getReg()); + else + addRegisterOffset(Block, Location.getReg(), Location.getOffset()); + + // Now attach the location information to the DIE. + addBlock(Die, Attribute, 0, Block); +} + +/// addComplexAddress - 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 DIVariable, starting from +/// the starting location. Add the DWARF information to the die. +/// +void CompileUnit::addComplexAddress(DbgVariable *&DV, DIE *Die, + unsigned Attribute, + const MachineLocation &Location) { + DIEBlock *Block = new (DIEValueAllocator) DIEBlock(); + unsigned N = DV->getNumAddrElements(); + unsigned i = 0; + if (Location.isReg()) { + if (N >= 2 && DV->getAddrElement(0) == DIBuilder::OpPlus) { + // If first address element is OpPlus then emit + // DW_OP_breg + Offset instead of DW_OP_reg + Offset. + addRegisterOffset(Block, Location.getReg(), DV->getAddrElement(1)); + i = 2; + } else + addRegisterOp(Block, Location.getReg()); + } + else + addRegisterOffset(Block, Location.getReg(), Location.getOffset()); + + for (;i < N; ++i) { + uint64_t Element = DV->getAddrElement(i); + if (Element == DIBuilder::OpPlus) { + addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_plus_uconst); + addUInt(Block, 0, dwarf::DW_FORM_udata, DV->getAddrElement(++i)); + } else if (Element == DIBuilder::OpDeref) { + addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_deref); + } else llvm_unreachable("unknown DIBuilder Opcode"); + } + + // Now attach the location information to the DIE. + addBlock(Die, Attribute, 0, Block); +} + +/* Byref variables, in Blocks, are declared by the programmer as "SomeType + VarName;", but the compiler creates a __Block_byref_x_VarName struct, and + gives the variable VarName either the struct, or a pointer to the struct, as + its type. This is necessary for various behind-the-scenes things the + compiler needs to do with by-reference variables in Blocks. + + However, as far as the original *programmer* is concerned, the variable + should still have type 'SomeType', as originally declared. + + The function getBlockByrefType dives into the __Block_byref_x_VarName + struct to find the original type of the variable, which is then assigned to + the variable's Debug Information Entry as its real type. So far, so good. + However now the debugger will expect the variable VarName to have the type + SomeType. So we need the location attribute for the variable to be an + expression that explains to the debugger how to navigate through the + pointers and struct to find the actual variable of type SomeType. + + The following function does just that. We start by getting + the "normal" location for the variable. This will be the location + of either the struct __Block_byref_x_VarName or the pointer to the + struct __Block_byref_x_VarName. + + The struct will look something like: + + struct __Block_byref_x_VarName { + ... <various fields> + struct __Block_byref_x_VarName *forwarding; + ... <various other fields> + SomeType VarName; + ... <maybe more fields> + }; + + If we are given the struct directly (as our starting point) we + need to tell the debugger to: + + 1). Add the offset of the forwarding field. + + 2). Follow that pointer to get the real __Block_byref_x_VarName + struct to use (the real one may have been copied onto the heap). + + 3). Add the offset for the field VarName, to find the actual variable. + + If we started with a pointer to the struct, then we need to + dereference that pointer first, before the other steps. + Translating this into DWARF ops, we will need to append the following + to the current location description for the variable: + + DW_OP_deref -- optional, if we start with a pointer + DW_OP_plus_uconst <forward_fld_offset> + DW_OP_deref + DW_OP_plus_uconst <varName_fld_offset> + + That is what this function does. */ + +/// addBlockByrefAddress - Start with the address based on the location +/// provided, and generate the DWARF information necessary to find the +/// actual Block variable (navigating the Block struct) based on the +/// starting location. Add the DWARF information to the die. For +/// more information, read large comment just above here. +/// +void CompileUnit::addBlockByrefAddress(DbgVariable *&DV, DIE *Die, + unsigned Attribute, + const MachineLocation &Location) { + DIType Ty = DV->getType(); + DIType TmpTy = Ty; + unsigned Tag = Ty.getTag(); + bool isPointer = false; + + StringRef varName = DV->getName(); + + if (Tag == dwarf::DW_TAG_pointer_type) { + DIDerivedType DTy = DIDerivedType(Ty); + TmpTy = DTy.getTypeDerivedFrom(); + isPointer = true; + } + + DICompositeType blockStruct = DICompositeType(TmpTy); + + // Find the __forwarding field and the variable field in the __Block_byref + // struct. + DIArray Fields = blockStruct.getTypeArray(); + DIDescriptor varField = DIDescriptor(); + DIDescriptor forwardingField = DIDescriptor(); + + for (unsigned i = 0, N = Fields.getNumElements(); i < N; ++i) { + DIDescriptor Element = Fields.getElement(i); + DIDerivedType DT = DIDerivedType(Element); + StringRef fieldName = DT.getName(); + if (fieldName == "__forwarding") + forwardingField = Element; + else if (fieldName == varName) + varField = Element; + } + + // Get the offsets for the forwarding field and the variable field. + unsigned forwardingFieldOffset = + DIDerivedType(forwardingField).getOffsetInBits() >> 3; + unsigned varFieldOffset = + DIDerivedType(varField).getOffsetInBits() >> 3; + + // Decode the original location, and use that as the start of the byref + // variable's location. + const TargetRegisterInfo *RI = Asm->TM.getRegisterInfo(); + unsigned Reg = RI->getDwarfRegNum(Location.getReg(), false); + DIEBlock *Block = new (DIEValueAllocator) DIEBlock(); + + if (Location.isReg()) { + if (Reg < 32) + addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_reg0 + Reg); + else { + addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_regx); + addUInt(Block, 0, dwarf::DW_FORM_udata, Reg); + } + } else { + if (Reg < 32) + addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_breg0 + Reg); + else { + addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_bregx); + addUInt(Block, 0, dwarf::DW_FORM_udata, Reg); + } + + addUInt(Block, 0, dwarf::DW_FORM_sdata, Location.getOffset()); + } + + // If we started with a pointer to the __Block_byref... struct, then + // the first thing we need to do is dereference the pointer (DW_OP_deref). + if (isPointer) + addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_deref); + + // Next add the offset for the '__forwarding' field: + // DW_OP_plus_uconst ForwardingFieldOffset. Note there's no point in + // adding the offset if it's 0. + if (forwardingFieldOffset > 0) { + addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_plus_uconst); + addUInt(Block, 0, dwarf::DW_FORM_udata, forwardingFieldOffset); + } + + // Now dereference the __forwarding field to get to the real __Block_byref + // struct: DW_OP_deref. + addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_deref); + + // Now that we've got the real __Block_byref... struct, add the offset + // for the variable's field to get to the location of the actual variable: + // DW_OP_plus_uconst varFieldOffset. Again, don't add if it's 0. + if (varFieldOffset > 0) { + addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_plus_uconst); + addUInt(Block, 0, dwarf::DW_FORM_udata, varFieldOffset); + } + + // Now attach the location information to the DIE. + addBlock(Die, Attribute, 0, Block); +} + +/// addConstantValue - Add constant value entry in variable DIE. +bool CompileUnit::addConstantValue(DIE *Die, const MachineOperand &MO, + DIType Ty) { + assert (MO.isImm() && "Invalid machine operand!"); + DIEBlock *Block = new (DIEValueAllocator) DIEBlock(); + unsigned form = dwarf::DW_FORM_udata; + switch (Ty.getSizeInBits()) { + case 8: form = dwarf::DW_FORM_data1; break; + case 16: form = dwarf::DW_FORM_data2; break; + case 32: form = dwarf::DW_FORM_data4; break; + case 64: form = dwarf::DW_FORM_data8; break; + default: break; + } + + DIBasicType BTy(Ty); + if (BTy.Verify() && + (BTy.getEncoding() == dwarf::DW_ATE_signed + || BTy.getEncoding() == dwarf::DW_ATE_signed_char)) + addSInt(Block, 0, form, MO.getImm()); + else + addUInt(Block, 0, form, MO.getImm()); + + addBlock(Die, dwarf::DW_AT_const_value, 0, Block); + return true; +} + +/// addConstantFPValue - Add constant value entry in variable DIE. +bool CompileUnit::addConstantFPValue(DIE *Die, const MachineOperand &MO) { + assert (MO.isFPImm() && "Invalid machine operand!"); + DIEBlock *Block = new (DIEValueAllocator) DIEBlock(); + APFloat FPImm = MO.getFPImm()->getValueAPF(); + + // Get the raw data form of the floating point. + const APInt FltVal = FPImm.bitcastToAPInt(); + const char *FltPtr = (const char*)FltVal.getRawData(); + + int NumBytes = FltVal.getBitWidth() / 8; // 8 bits per byte. + bool LittleEndian = Asm->getTargetData().isLittleEndian(); + int Incr = (LittleEndian ? 1 : -1); + int Start = (LittleEndian ? 0 : NumBytes - 1); + int Stop = (LittleEndian ? NumBytes : -1); + + // Output the constant to DWARF one byte at a time. + for (; Start != Stop; Start += Incr) + addUInt(Block, 0, dwarf::DW_FORM_data1, + (unsigned char)0xFF & FltPtr[Start]); + + addBlock(Die, dwarf::DW_AT_const_value, 0, Block); + return true; +} + +/// addConstantValue - Add constant value entry in variable DIE. +bool CompileUnit::addConstantValue(DIE *Die, ConstantInt *CI, + bool Unsigned) { + unsigned CIBitWidth = CI->getBitWidth(); + if (CIBitWidth <= 64) { + unsigned form = 0; + switch (CIBitWidth) { + case 8: form = dwarf::DW_FORM_data1; break; + case 16: form = dwarf::DW_FORM_data2; break; + case 32: form = dwarf::DW_FORM_data4; break; + case 64: form = dwarf::DW_FORM_data8; break; + default: + form = Unsigned ? dwarf::DW_FORM_udata : dwarf::DW_FORM_sdata; + } + if (Unsigned) + addUInt(Die, dwarf::DW_AT_const_value, form, CI->getZExtValue()); + else + addSInt(Die, dwarf::DW_AT_const_value, form, CI->getSExtValue()); + return true; + } + + DIEBlock *Block = new (DIEValueAllocator) DIEBlock(); + + // Get the raw data form of the large APInt. + const APInt Val = CI->getValue(); + const char *Ptr = (const char*)Val.getRawData(); + + int NumBytes = Val.getBitWidth() / 8; // 8 bits per byte. + bool LittleEndian = Asm->getTargetData().isLittleEndian(); + int Incr = (LittleEndian ? 1 : -1); + int Start = (LittleEndian ? 0 : NumBytes - 1); + int Stop = (LittleEndian ? NumBytes : -1); + + // Output the constant to DWARF one byte at a time. + for (; Start != Stop; Start += Incr) + addUInt(Block, 0, dwarf::DW_FORM_data1, + (unsigned char)0xFF & Ptr[Start]); + + addBlock(Die, dwarf::DW_AT_const_value, 0, Block); + return true; +} + +/// addTemplateParams - Add template parameters in buffer. +void CompileUnit::addTemplateParams(DIE &Buffer, DIArray TParams) { + // Add template parameters. + for (unsigned i = 0, e = TParams.getNumElements(); i != e; ++i) { + DIDescriptor Element = TParams.getElement(i); + if (Element.isTemplateTypeParameter()) + Buffer.addChild(getOrCreateTemplateTypeParameterDIE( + DITemplateTypeParameter(Element))); + else if (Element.isTemplateValueParameter()) + Buffer.addChild(getOrCreateTemplateValueParameterDIE( + DITemplateValueParameter(Element))); + } + +} +/// addToContextOwner - Add Die into the list of its context owner's children. +void CompileUnit::addToContextOwner(DIE *Die, DIDescriptor Context) { + if (Context.isType()) { + DIE *ContextDIE = getOrCreateTypeDIE(DIType(Context)); + ContextDIE->addChild(Die); + } else if (Context.isNameSpace()) { + DIE *ContextDIE = getOrCreateNameSpace(DINameSpace(Context)); + ContextDIE->addChild(Die); + } else if (Context.isSubprogram()) { + DIE *ContextDIE = DD->createSubprogramDIE(DISubprogram(Context)); + ContextDIE->addChild(Die); + } else if (DIE *ContextDIE = getDIE(Context)) + ContextDIE->addChild(Die); + else + addDie(Die); +} + +/// getOrCreateTypeDIE - Find existing DIE or create new DIE for the +/// given DIType. +DIE *CompileUnit::getOrCreateTypeDIE(DIType Ty) { + DIE *TyDIE = getDIE(Ty); + if (TyDIE) + return TyDIE; + + // Create new type. + TyDIE = new DIE(dwarf::DW_TAG_base_type); + insertDIE(Ty, TyDIE); + if (Ty.isBasicType()) + constructTypeDIE(*TyDIE, DIBasicType(Ty)); + else if (Ty.isCompositeType()) + constructTypeDIE(*TyDIE, DICompositeType(Ty)); + else { + assert(Ty.isDerivedType() && "Unknown kind of DIType"); + constructTypeDIE(*TyDIE, DIDerivedType(Ty)); + } + + addToContextOwner(TyDIE, Ty.getContext()); + return TyDIE; +} + +/// addType - Add a new type attribute to the specified entity. +void CompileUnit::addType(DIE *Entity, DIType Ty) { + if (!Ty.Verify()) + return; + + // Check for pre-existence. + DIEEntry *Entry = getDIEEntry(Ty); + // If it exists then use the existing value. + if (Entry) { + Entity->addValue(dwarf::DW_AT_type, dwarf::DW_FORM_ref4, Entry); + return; + } + + // Construct type. + DIE *Buffer = getOrCreateTypeDIE(Ty); + + // Set up proxy. + Entry = createDIEEntry(Buffer); + insertDIEEntry(Ty, Entry); + Entity->addValue(dwarf::DW_AT_type, dwarf::DW_FORM_ref4, Entry); + + // If this is a complete composite type then include it in the + // list of global types. + addGlobalType(Ty); +} + +/// addGlobalType - Add a new global type to the compile unit. +/// +void CompileUnit::addGlobalType(DIType Ty) { + DIDescriptor Context = Ty.getContext(); + if (Ty.isCompositeType() && !Ty.getName().empty() && !Ty.isForwardDecl() + && (Context.isCompileUnit() || Context.isFile() || Context.isNameSpace())) + if (DIEEntry *Entry = getDIEEntry(Ty)) + GlobalTypes[Ty.getName()] = Entry->getEntry(); +} + +/// addPubTypes - Add type for pubtypes section. +void CompileUnit::addPubTypes(DISubprogram SP) { + DICompositeType SPTy = SP.getType(); + unsigned SPTag = SPTy.getTag(); + if (SPTag != dwarf::DW_TAG_subroutine_type) + return; + + DIArray Args = SPTy.getTypeArray(); + for (unsigned i = 0, e = Args.getNumElements(); i != e; ++i) { + DIType ATy(Args.getElement(i)); + if (!ATy.Verify()) + continue; + addGlobalType(ATy); + } +} + +/// constructTypeDIE - Construct basic type die from DIBasicType. +void CompileUnit::constructTypeDIE(DIE &Buffer, DIBasicType BTy) { + // Get core information. + StringRef Name = BTy.getName(); + Buffer.setTag(dwarf::DW_TAG_base_type); + addUInt(&Buffer, dwarf::DW_AT_encoding, dwarf::DW_FORM_data1, + BTy.getEncoding()); + + // Add name if not anonymous or intermediate type. + if (!Name.empty()) + addString(&Buffer, dwarf::DW_AT_name, dwarf::DW_FORM_string, Name); + uint64_t Size = BTy.getSizeInBits() >> 3; + addUInt(&Buffer, dwarf::DW_AT_byte_size, 0, Size); +} + +/// constructTypeDIE - Construct derived type die from DIDerivedType. +void CompileUnit::constructTypeDIE(DIE &Buffer, DIDerivedType DTy) { + // Get core information. + StringRef Name = DTy.getName(); + uint64_t Size = DTy.getSizeInBits() >> 3; + unsigned Tag = DTy.getTag(); + + // FIXME - Workaround for templates. + if (Tag == dwarf::DW_TAG_inheritance) Tag = dwarf::DW_TAG_reference_type; + + Buffer.setTag(Tag); + + // Map to main type, void will not have a type. + DIType FromTy = DTy.getTypeDerivedFrom(); + addType(&Buffer, FromTy); + + // Add name if not anonymous or intermediate type. + if (!Name.empty()) + addString(&Buffer, dwarf::DW_AT_name, dwarf::DW_FORM_string, Name); + + // Add size if non-zero (derived types might be zero-sized.) + if (Size) + addUInt(&Buffer, dwarf::DW_AT_byte_size, 0, Size); + + // Add source line info if available and TyDesc is not a forward declaration. + if (!DTy.isForwardDecl()) + addSourceLine(&Buffer, DTy); +} + +/// constructTypeDIE - Construct type DIE from DICompositeType. +void CompileUnit::constructTypeDIE(DIE &Buffer, DICompositeType CTy) { + // Get core information. + StringRef Name = CTy.getName(); + + uint64_t Size = CTy.getSizeInBits() >> 3; + unsigned Tag = CTy.getTag(); + Buffer.setTag(Tag); + + switch (Tag) { + case dwarf::DW_TAG_vector_type: + case dwarf::DW_TAG_array_type: + constructArrayTypeDIE(Buffer, &CTy); + break; + case dwarf::DW_TAG_enumeration_type: { + DIArray Elements = CTy.getTypeArray(); + + // Add enumerators to enumeration type. + for (unsigned i = 0, N = Elements.getNumElements(); i < N; ++i) { + DIE *ElemDie = NULL; + DIDescriptor Enum(Elements.getElement(i)); + if (Enum.isEnumerator()) { + ElemDie = constructEnumTypeDIE(DIEnumerator(Enum)); + Buffer.addChild(ElemDie); + } + } + } + break; + case dwarf::DW_TAG_subroutine_type: { + // Add return type. + DIArray Elements = CTy.getTypeArray(); + DIDescriptor RTy = Elements.getElement(0); + addType(&Buffer, DIType(RTy)); + + bool isPrototyped = true; + // Add arguments. + for (unsigned i = 1, N = Elements.getNumElements(); i < N; ++i) { + DIDescriptor Ty = Elements.getElement(i); + if (Ty.isUnspecifiedParameter()) { + DIE *Arg = new DIE(dwarf::DW_TAG_unspecified_parameters); + Buffer.addChild(Arg); + isPrototyped = false; + } else { + DIE *Arg = new DIE(dwarf::DW_TAG_formal_parameter); + addType(Arg, DIType(Ty)); + Buffer.addChild(Arg); + } + } + // Add prototype flag. + if (isPrototyped) + addUInt(&Buffer, dwarf::DW_AT_prototyped, dwarf::DW_FORM_flag, 1); + } + break; + case dwarf::DW_TAG_structure_type: + case dwarf::DW_TAG_union_type: + case dwarf::DW_TAG_class_type: { + // Add elements to structure type. + DIArray Elements = CTy.getTypeArray(); + + // A forward struct declared type may not have elements available. + unsigned N = Elements.getNumElements(); + if (N == 0) + break; + + // Add elements to structure type. + for (unsigned i = 0; i < N; ++i) { + DIDescriptor Element = Elements.getElement(i); + DIE *ElemDie = NULL; + if (Element.isSubprogram()) { + DISubprogram SP(Element); + ElemDie = DD->createSubprogramDIE(DISubprogram(Element)); + if (SP.isProtected()) + addUInt(ElemDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_flag, + dwarf::DW_ACCESS_protected); + else if (SP.isPrivate()) + addUInt(ElemDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_flag, + dwarf::DW_ACCESS_private); + else + addUInt(ElemDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_flag, + dwarf::DW_ACCESS_public); + if (SP.isExplicit()) + addUInt(ElemDie, dwarf::DW_AT_explicit, dwarf::DW_FORM_flag, 1); + } + else if (Element.isVariable()) { + DIVariable DV(Element); + ElemDie = new DIE(dwarf::DW_TAG_variable); + addString(ElemDie, dwarf::DW_AT_name, dwarf::DW_FORM_string, + DV.getName()); + addType(ElemDie, DV.getType()); + addUInt(ElemDie, dwarf::DW_AT_declaration, dwarf::DW_FORM_flag, 1); + addUInt(ElemDie, dwarf::DW_AT_external, dwarf::DW_FORM_flag, 1); + addSourceLine(ElemDie, DV); + } else if (Element.isDerivedType()) + ElemDie = createMemberDIE(DIDerivedType(Element)); + else + continue; + Buffer.addChild(ElemDie); + } + + if (CTy.isAppleBlockExtension()) + addUInt(&Buffer, dwarf::DW_AT_APPLE_block, dwarf::DW_FORM_flag, 1); + + unsigned RLang = CTy.getRunTimeLang(); + if (RLang) + addUInt(&Buffer, dwarf::DW_AT_APPLE_runtime_class, + dwarf::DW_FORM_data1, RLang); + + DICompositeType ContainingType = CTy.getContainingType(); + if (DIDescriptor(ContainingType).isCompositeType()) + addDIEEntry(&Buffer, dwarf::DW_AT_containing_type, dwarf::DW_FORM_ref4, + getOrCreateTypeDIE(DIType(ContainingType))); + else { + DIDescriptor Context = CTy.getContext(); + addToContextOwner(&Buffer, Context); + } + + if (CTy.isObjcClassComplete()) + addUInt(&Buffer, dwarf::DW_AT_APPLE_objc_complete_type, + dwarf::DW_FORM_flag, 1); + + if (Tag == dwarf::DW_TAG_class_type) + addTemplateParams(Buffer, CTy.getTemplateParams()); + + break; + } + default: + break; + } + + // Add name if not anonymous or intermediate type. + if (!Name.empty()) + addString(&Buffer, dwarf::DW_AT_name, dwarf::DW_FORM_string, Name); + + if (Tag == dwarf::DW_TAG_enumeration_type || Tag == dwarf::DW_TAG_class_type + || Tag == dwarf::DW_TAG_structure_type || Tag == dwarf::DW_TAG_union_type) + { + // Add size if non-zero (derived types might be zero-sized.) + if (Size) + addUInt(&Buffer, dwarf::DW_AT_byte_size, 0, Size); + else { + // Add zero size if it is not a forward declaration. + if (CTy.isForwardDecl()) + addUInt(&Buffer, dwarf::DW_AT_declaration, dwarf::DW_FORM_flag, 1); + else + addUInt(&Buffer, dwarf::DW_AT_byte_size, 0, 0); + } + + // Add source line info if available. + if (!CTy.isForwardDecl()) + addSourceLine(&Buffer, CTy); + } +} + +/// getOrCreateTemplateTypeParameterDIE - Find existing DIE or create new DIE +/// for the given DITemplateTypeParameter. +DIE * +CompileUnit::getOrCreateTemplateTypeParameterDIE(DITemplateTypeParameter TP) { + DIE *ParamDIE = getDIE(TP); + if (ParamDIE) + return ParamDIE; + + ParamDIE = new DIE(dwarf::DW_TAG_template_type_parameter); + addType(ParamDIE, TP.getType()); + addString(ParamDIE, dwarf::DW_AT_name, dwarf::DW_FORM_string, TP.getName()); + return ParamDIE; +} + +/// getOrCreateTemplateValueParameterDIE - Find existing DIE or create new DIE +/// for the given DITemplateValueParameter. +DIE * +CompileUnit::getOrCreateTemplateValueParameterDIE(DITemplateValueParameter TPV) { + DIE *ParamDIE = getDIE(TPV); + if (ParamDIE) + return ParamDIE; + + ParamDIE = new DIE(dwarf::DW_TAG_template_value_parameter); + addType(ParamDIE, TPV.getType()); + if (!TPV.getName().empty()) + addString(ParamDIE, dwarf::DW_AT_name, dwarf::DW_FORM_string, TPV.getName()); + addUInt(ParamDIE, dwarf::DW_AT_const_value, dwarf::DW_FORM_udata, + TPV.getValue()); + return ParamDIE; +} + +/// getOrCreateNameSpace - Create a DIE for DINameSpace. +DIE *CompileUnit::getOrCreateNameSpace(DINameSpace NS) { + DIE *NDie = getDIE(NS); + if (NDie) + return NDie; + NDie = new DIE(dwarf::DW_TAG_namespace); + insertDIE(NS, NDie); + if (!NS.getName().empty()) + addString(NDie, dwarf::DW_AT_name, dwarf::DW_FORM_string, NS.getName()); + addSourceLine(NDie, NS); + addToContextOwner(NDie, NS.getContext()); + return NDie; +} + +/// constructSubrangeDIE - Construct subrange DIE from DISubrange. +void CompileUnit::constructSubrangeDIE(DIE &Buffer, DISubrange SR, DIE *IndexTy){ + DIE *DW_Subrange = new DIE(dwarf::DW_TAG_subrange_type); + addDIEEntry(DW_Subrange, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, IndexTy); + int64_t L = SR.getLo(); + int64_t H = SR.getHi(); + + // The L value defines the lower bounds which is typically zero for C/C++. The + // H value is the upper bounds. Values are 64 bit. H - L + 1 is the size + // of the array. If L > H then do not emit DW_AT_lower_bound and + // DW_AT_upper_bound attributes. If L is zero and H is also zero then the + // array has one element and in such case do not emit lower bound. + + if (L > H) { + Buffer.addChild(DW_Subrange); + return; + } + if (L) + addSInt(DW_Subrange, dwarf::DW_AT_lower_bound, 0, L); + addSInt(DW_Subrange, dwarf::DW_AT_upper_bound, 0, H); + Buffer.addChild(DW_Subrange); +} + +/// constructArrayTypeDIE - Construct array type DIE from DICompositeType. +void CompileUnit::constructArrayTypeDIE(DIE &Buffer, + DICompositeType *CTy) { + Buffer.setTag(dwarf::DW_TAG_array_type); + if (CTy->getTag() == dwarf::DW_TAG_vector_type) + addUInt(&Buffer, dwarf::DW_AT_GNU_vector, dwarf::DW_FORM_flag, 1); + + // Emit derived type. + addType(&Buffer, CTy->getTypeDerivedFrom()); + DIArray Elements = CTy->getTypeArray(); + + // Get an anonymous type for index type. + DIE *IdxTy = getIndexTyDie(); + if (!IdxTy) { + // Construct an anonymous type for index type. + IdxTy = new DIE(dwarf::DW_TAG_base_type); + addUInt(IdxTy, dwarf::DW_AT_byte_size, 0, sizeof(int32_t)); + addUInt(IdxTy, dwarf::DW_AT_encoding, dwarf::DW_FORM_data1, + dwarf::DW_ATE_signed); + addDie(IdxTy); + setIndexTyDie(IdxTy); + } + + // Add subranges to array type. + for (unsigned i = 0, N = Elements.getNumElements(); i < N; ++i) { + DIDescriptor Element = Elements.getElement(i); + if (Element.getTag() == dwarf::DW_TAG_subrange_type) + constructSubrangeDIE(Buffer, DISubrange(Element), IdxTy); + } +} + +/// constructEnumTypeDIE - Construct enum type DIE from DIEnumerator. +DIE *CompileUnit::constructEnumTypeDIE(DIEnumerator ETy) { + DIE *Enumerator = new DIE(dwarf::DW_TAG_enumerator); + StringRef Name = ETy.getName(); + addString(Enumerator, dwarf::DW_AT_name, dwarf::DW_FORM_string, Name); + int64_t Value = ETy.getEnumValue(); + addSInt(Enumerator, dwarf::DW_AT_const_value, dwarf::DW_FORM_sdata, Value); + return Enumerator; +} + +/// createMemberDIE - Create new member DIE. +DIE *CompileUnit::createMemberDIE(DIDerivedType DT) { + DIE *MemberDie = new DIE(DT.getTag()); + StringRef Name = DT.getName(); + if (!Name.empty()) + addString(MemberDie, dwarf::DW_AT_name, dwarf::DW_FORM_string, Name); + + addType(MemberDie, DT.getTypeDerivedFrom()); + + addSourceLine(MemberDie, DT); + + DIEBlock *MemLocationDie = new (DIEValueAllocator) DIEBlock(); + addUInt(MemLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_plus_uconst); + + uint64_t Size = DT.getSizeInBits(); + uint64_t FieldSize = DT.getOriginalTypeSize(); + + if (Size != FieldSize) { + // Handle bitfield. + addUInt(MemberDie, dwarf::DW_AT_byte_size, 0, DT.getOriginalTypeSize()>>3); + addUInt(MemberDie, dwarf::DW_AT_bit_size, 0, DT.getSizeInBits()); + + uint64_t Offset = DT.getOffsetInBits(); + uint64_t AlignMask = ~(DT.getAlignInBits() - 1); + uint64_t HiMark = (Offset + FieldSize) & AlignMask; + uint64_t FieldOffset = (HiMark - FieldSize); + Offset -= FieldOffset; + + // Maybe we need to work from the other end. + if (Asm->getTargetData().isLittleEndian()) + Offset = FieldSize - (Offset + Size); + addUInt(MemberDie, dwarf::DW_AT_bit_offset, 0, Offset); + + // Here WD_AT_data_member_location points to the anonymous + // field that includes this bit field. + addUInt(MemLocationDie, 0, dwarf::DW_FORM_udata, FieldOffset >> 3); + + } else + // This is not a bitfield. + addUInt(MemLocationDie, 0, dwarf::DW_FORM_udata, DT.getOffsetInBits() >> 3); + + if (DT.getTag() == dwarf::DW_TAG_inheritance + && DT.isVirtual()) { + + // For C++, virtual base classes are not at fixed offset. Use following + // expression to extract appropriate offset from vtable. + // BaseAddr = ObAddr + *((*ObAddr) - Offset) + + DIEBlock *VBaseLocationDie = new (DIEValueAllocator) DIEBlock(); + addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_dup); + addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_deref); + addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_constu); + addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_udata, DT.getOffsetInBits()); + addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_minus); + addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_deref); + addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_plus); + + addBlock(MemberDie, dwarf::DW_AT_data_member_location, 0, + VBaseLocationDie); + } else + addBlock(MemberDie, dwarf::DW_AT_data_member_location, 0, MemLocationDie); + + if (DT.isProtected()) + addUInt(MemberDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_flag, + dwarf::DW_ACCESS_protected); + else if (DT.isPrivate()) + addUInt(MemberDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_flag, + dwarf::DW_ACCESS_private); + // Otherwise C++ member and base classes are considered public. + else if (DT.getCompileUnit().getLanguage() == dwarf::DW_LANG_C_plus_plus) + addUInt(MemberDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_flag, + dwarf::DW_ACCESS_public); + if (DT.isVirtual()) + addUInt(MemberDie, dwarf::DW_AT_virtuality, dwarf::DW_FORM_flag, + dwarf::DW_VIRTUALITY_virtual); + + // Objective-C properties. + StringRef PropertyName = DT.getObjCPropertyName(); + if (!PropertyName.empty()) { + addString(MemberDie, dwarf::DW_AT_APPLE_property_name, dwarf::DW_FORM_string, + PropertyName); + StringRef GetterName = DT.getObjCPropertyGetterName(); + if (!GetterName.empty()) + addString(MemberDie, dwarf::DW_AT_APPLE_property_getter, + dwarf::DW_FORM_string, GetterName); + StringRef SetterName = DT.getObjCPropertySetterName(); + if (!SetterName.empty()) + addString(MemberDie, dwarf::DW_AT_APPLE_property_setter, + dwarf::DW_FORM_string, SetterName); + unsigned PropertyAttributes = 0; + if (DT.isReadOnlyObjCProperty()) + PropertyAttributes |= dwarf::DW_APPLE_PROPERTY_readonly; + if (DT.isReadWriteObjCProperty()) + PropertyAttributes |= dwarf::DW_APPLE_PROPERTY_readwrite; + if (DT.isAssignObjCProperty()) + PropertyAttributes |= dwarf::DW_APPLE_PROPERTY_assign; + if (DT.isRetainObjCProperty()) + PropertyAttributes |= dwarf::DW_APPLE_PROPERTY_retain; + if (DT.isCopyObjCProperty()) + PropertyAttributes |= dwarf::DW_APPLE_PROPERTY_copy; + if (DT.isNonAtomicObjCProperty()) + PropertyAttributes |= dwarf::DW_APPLE_PROPERTY_nonatomic; + if (PropertyAttributes) + addUInt(MemberDie, dwarf::DW_AT_APPLE_property_attribute, 0, + PropertyAttributes); + } + return MemberDie; +} diff --git a/lib/CodeGen/AsmPrinter/DwarfCompileUnit.h b/lib/CodeGen/AsmPrinter/DwarfCompileUnit.h new file mode 100644 index 0000000..60a9b28 --- /dev/null +++ b/lib/CodeGen/AsmPrinter/DwarfCompileUnit.h @@ -0,0 +1,280 @@ +//===-- llvm/CodeGen/DwarfCompileUnit.h - Dwarf Compile Unit ---*- C++ -*--===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file contains support for writing dwarf compile unit. +// +//===----------------------------------------------------------------------===// + +#ifndef CODEGEN_ASMPRINTER_DWARFCOMPILEUNIT_H +#define CODEGEN_ASMPRINTER_DWARFCOMPILEUNIT_H + +#include "DIE.h" +#include "llvm/Analysis/DebugInfo.h" +#include "llvm/ADT/DenseMap.h" +#include "llvm/ADT/StringMap.h" +#include "llvm/ADT/OwningPtr.h" + +namespace llvm { + +class DwarfDebug; +class MachineLocation; +class MachineOperand; +class ConstantInt; +class DbgVariable; + +//===----------------------------------------------------------------------===// +/// CompileUnit - This dwarf writer support class manages information associate +/// with a source file. +class CompileUnit { + /// ID - File identifier for source. + /// + unsigned ID; + + /// Die - Compile unit debug information entry. + /// + const OwningPtr<DIE> CUDie; + + /// Asm - Target of Dwarf emission. + AsmPrinter *Asm; + + DwarfDebug *DD; + + /// IndexTyDie - An anonymous type for index type. Owned by CUDie. + DIE *IndexTyDie; + + /// MDNodeToDieMap - Tracks the mapping of unit level debug informaton + /// variables to debug information entries. + DenseMap<const MDNode *, DIE *> MDNodeToDieMap; + + /// MDNodeToDIEEntryMap - Tracks the mapping of unit level debug informaton + /// descriptors to debug information entries using a DIEEntry proxy. + DenseMap<const MDNode *, DIEEntry *> MDNodeToDIEEntryMap; + + /// Globals - A map of globally visible named entities for this unit. + /// + StringMap<DIE*> Globals; + + /// GlobalTypes - A map of globally visible types for this unit. + /// + StringMap<DIE*> GlobalTypes; + + /// DIEBlocks - A list of all the DIEBlocks in use. + std::vector<DIEBlock *> DIEBlocks; + +public: + CompileUnit(unsigned I, DIE *D, AsmPrinter *A, DwarfDebug *DW); + ~CompileUnit(); + + // Accessors. + unsigned getID() const { return ID; } + DIE* getCUDie() const { return CUDie.get(); } + const StringMap<DIE*> &getGlobals() const { return Globals; } + const StringMap<DIE*> &getGlobalTypes() const { return GlobalTypes; } + + /// hasContent - Return true if this compile unit has something to write out. + /// + bool hasContent() const { return !CUDie->getChildren().empty(); } + + /// addGlobal - Add a new global entity to the compile unit. + /// + void addGlobal(StringRef Name, DIE *Die) { Globals[Name] = Die; } + + /// addGlobalType - Add a new global type to the compile unit. + /// + void addGlobalType(DIType Ty); + + /// getDIE - Returns the debug information entry map slot for the + /// specified debug variable. + DIE *getDIE(const MDNode *N) { return MDNodeToDieMap.lookup(N); } + + DIEBlock *getDIEBlock() { + return new (DIEValueAllocator) DIEBlock(); + } + + /// insertDIE - Insert DIE into the map. + void insertDIE(const MDNode *N, DIE *D) { + MDNodeToDieMap.insert(std::make_pair(N, D)); + } + + /// getDIEEntry - Returns the debug information entry for the specified + /// debug variable. + DIEEntry *getDIEEntry(const MDNode *N) { + DenseMap<const MDNode *, DIEEntry *>::iterator I = + MDNodeToDIEEntryMap.find(N); + if (I == MDNodeToDIEEntryMap.end()) + return NULL; + return I->second; + } + + /// insertDIEEntry - Insert debug information entry into the map. + void insertDIEEntry(const MDNode *N, DIEEntry *E) { + MDNodeToDIEEntryMap.insert(std::make_pair(N, E)); + } + + /// addDie - Adds or interns the DIE to the compile unit. + /// + void addDie(DIE *Buffer) { + this->CUDie->addChild(Buffer); + } + + // getIndexTyDie - Get an anonymous type for index type. + DIE *getIndexTyDie() { + return IndexTyDie; + } + + // setIndexTyDie - Set D as anonymous type for index which can be reused + // later. + void setIndexTyDie(DIE *D) { + IndexTyDie = D; + } +public: + + /// addUInt - Add an unsigned integer attribute data and value. + /// + void addUInt(DIE *Die, unsigned Attribute, unsigned Form, uint64_t Integer); + + /// addSInt - Add an signed integer attribute data and value. + /// + void addSInt(DIE *Die, unsigned Attribute, unsigned Form, int64_t Integer); + + /// addString - Add a string attribute data and value. + /// + void addString(DIE *Die, unsigned Attribute, unsigned Form, + const StringRef Str); + + /// addLabel - Add a Dwarf label attribute data and value. + /// + void addLabel(DIE *Die, unsigned Attribute, unsigned Form, + const MCSymbol *Label); + + /// addDelta - Add a label delta attribute data and value. + /// + void addDelta(DIE *Die, unsigned Attribute, unsigned Form, + const MCSymbol *Hi, const MCSymbol *Lo); + + /// addDIEEntry - Add a DIE attribute data and value. + /// + void addDIEEntry(DIE *Die, unsigned Attribute, unsigned Form, DIE *Entry); + + /// addBlock - Add block data. + /// + void addBlock(DIE *Die, unsigned Attribute, unsigned Form, DIEBlock *Block); + + /// addSourceLine - Add location information to specified debug information + /// entry. + void addSourceLine(DIE *Die, DIVariable V); + void addSourceLine(DIE *Die, DIGlobalVariable G); + void addSourceLine(DIE *Die, DISubprogram SP); + void addSourceLine(DIE *Die, DIType Ty); + void addSourceLine(DIE *Die, DINameSpace NS); + + /// addAddress - Add an address attribute to a die based on the location + /// provided. + void addAddress(DIE *Die, unsigned Attribute, + const MachineLocation &Location); + + /// addConstantValue - Add constant value entry in variable DIE. + bool addConstantValue(DIE *Die, const MachineOperand &MO, DIType Ty); + bool addConstantValue(DIE *Die, ConstantInt *CI, bool Unsigned); + + /// addConstantFPValue - Add constant value entry in variable DIE. + bool addConstantFPValue(DIE *Die, const MachineOperand &MO); + + /// addTemplateParams - Add template parameters in buffer. + void addTemplateParams(DIE &Buffer, DIArray TParams); + + /// addRegisterOp - Add register operand. + void addRegisterOp(DIE *TheDie, unsigned Reg); + + /// addRegisterOffset - Add register offset. + void addRegisterOffset(DIE *TheDie, unsigned Reg, int64_t Offset); + + /// addComplexAddress - Start with the address based on the location provided, + /// and generate the DWARF information necessary to find the actual variable + /// (navigating the extra location information encoded in the type) based on + /// the starting location. Add the DWARF information to the die. + /// + void addComplexAddress(DbgVariable *&DV, DIE *Die, unsigned Attribute, + const MachineLocation &Location); + + // FIXME: Should be reformulated in terms of addComplexAddress. + /// addBlockByrefAddress - Start with the address based on the location + /// provided, and generate the DWARF information necessary to find the + /// actual Block variable (navigating the Block struct) based on the + /// starting location. Add the DWARF information to the die. Obsolete, + /// please use addComplexAddress instead. + /// + void addBlockByrefAddress(DbgVariable *&DV, DIE *Die, unsigned Attribute, + const MachineLocation &Location); + + /// addVariableAddress - Add DW_AT_location attribute for a + /// DbgVariable based on provided MachineLocation. + void addVariableAddress(DbgVariable *&DV, DIE *Die, MachineLocation Location); + + /// addToContextOwner - Add Die into the list of its context owner's children. + void addToContextOwner(DIE *Die, DIDescriptor Context); + + /// addType - Add a new type attribute to the specified entity. + void addType(DIE *Entity, DIType Ty); + + /// getOrCreateNameSpace - Create a DIE for DINameSpace. + DIE *getOrCreateNameSpace(DINameSpace NS); + + /// getOrCreateTypeDIE - Find existing DIE or create new DIE for the + /// given DIType. + DIE *getOrCreateTypeDIE(DIType Ty); + + /// getOrCreateTemplateTypeParameterDIE - Find existing DIE or create new DIE + /// for the given DITemplateTypeParameter. + DIE *getOrCreateTemplateTypeParameterDIE(DITemplateTypeParameter TP); + + /// getOrCreateTemplateValueParameterDIE - Find existing DIE or create new DIE + /// for the given DITemplateValueParameter. + DIE *getOrCreateTemplateValueParameterDIE(DITemplateValueParameter TVP); + + /// createDIEEntry - Creates a new DIEEntry to be a proxy for a debug + /// information entry. + DIEEntry *createDIEEntry(DIE *Entry); + + void addPubTypes(DISubprogram SP); + + /// constructTypeDIE - Construct basic type die from DIBasicType. + void constructTypeDIE(DIE &Buffer, + DIBasicType BTy); + + /// constructTypeDIE - Construct derived type die from DIDerivedType. + void constructTypeDIE(DIE &Buffer, + DIDerivedType DTy); + + /// constructTypeDIE - Construct type DIE from DICompositeType. + void constructTypeDIE(DIE &Buffer, + DICompositeType CTy); + + /// constructSubrangeDIE - Construct subrange DIE from DISubrange. + void constructSubrangeDIE(DIE &Buffer, DISubrange SR, DIE *IndexTy); + + /// constructArrayTypeDIE - Construct array type DIE from DICompositeType. + void constructArrayTypeDIE(DIE &Buffer, + DICompositeType *CTy); + + /// constructEnumTypeDIE - Construct enum type DIE from DIEnumerator. + DIE *constructEnumTypeDIE(DIEnumerator ETy); + + /// createMemberDIE - Create new member DIE. + DIE *createMemberDIE(DIDerivedType DT); + +private: + + // DIEValueAllocator - All DIEValues are allocated through this allocator. + BumpPtrAllocator DIEValueAllocator; + DIEInteger *DIEIntegerOne; +}; + +} // end llvm namespace +#endif diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp index bad87c1..8845bfa 100644 --- a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp +++ b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp @@ -14,6 +14,7 @@ #define DEBUG_TYPE "dwarfdebug" #include "DwarfDebug.h" #include "DIE.h" +#include "DwarfCompileUnit.h" #include "llvm/Constants.h" #include "llvm/Module.h" #include "llvm/Instructions.h" @@ -52,13 +53,9 @@ static cl::opt<bool> DisableDebugInfoPrinting("disable-debug-info-print", cl::desc("Disable debug info printing")); static cl::opt<bool> UnknownLocations("use-unknown-locations", cl::Hidden, - cl::desc("Make an absense of debug location information explicit."), + cl::desc("Make an absence of debug location information explicit."), cl::init(false)); -#ifndef NDEBUG -STATISTIC(BlocksWithoutLineNo, "Number of blocks without any line number"); -#endif - namespace { const char *DWARFGroupName = "DWARF Emission"; const char *DbgTimerName = "DWARF Debug Writer"; @@ -72,189 +69,56 @@ static const unsigned InitAbbreviationsSetSize = 9; // log2(512) namespace llvm { -//===----------------------------------------------------------------------===// -/// CompileUnit - This dwarf writer support class manages information associate -/// with a source file. -class CompileUnit { - /// ID - File identifier for source. - /// - unsigned ID; - - /// Die - Compile unit debug information entry. - /// - const OwningPtr<DIE> CUDie; - - /// IndexTyDie - An anonymous type for index type. Owned by CUDie. - DIE *IndexTyDie; - - /// MDNodeToDieMap - Tracks the mapping of unit level debug informaton - /// variables to debug information entries. - DenseMap<const MDNode *, DIE *> MDNodeToDieMap; - - /// MDNodeToDIEEntryMap - Tracks the mapping of unit level debug informaton - /// descriptors to debug information entries using a DIEEntry proxy. - DenseMap<const MDNode *, DIEEntry *> MDNodeToDIEEntryMap; - - /// Globals - A map of globally visible named entities for this unit. - /// - StringMap<DIE*> Globals; - - /// GlobalTypes - A map of globally visible types for this unit. - /// - StringMap<DIE*> GlobalTypes; - -public: - CompileUnit(unsigned I, DIE *D) - : ID(I), CUDie(D), IndexTyDie(0) {} - - // Accessors. - unsigned getID() const { return ID; } - DIE* getCUDie() const { return CUDie.get(); } - const StringMap<DIE*> &getGlobals() const { return Globals; } - const StringMap<DIE*> &getGlobalTypes() const { return GlobalTypes; } - - /// hasContent - Return true if this compile unit has something to write out. - /// - bool hasContent() const { return !CUDie->getChildren().empty(); } - - /// addGlobal - Add a new global entity to the compile unit. - /// - void addGlobal(StringRef Name, DIE *Die) { Globals[Name] = Die; } - - /// addGlobalType - Add a new global type to the compile unit. - /// - void addGlobalType(StringRef Name, DIE *Die) { - GlobalTypes[Name] = Die; - } - - /// getDIE - Returns the debug information entry map slot for the - /// specified debug variable. - DIE *getDIE(const MDNode *N) { return MDNodeToDieMap.lookup(N); } - - /// insertDIE - Insert DIE into the map. - void insertDIE(const MDNode *N, DIE *D) { - MDNodeToDieMap.insert(std::make_pair(N, D)); - } - - /// getDIEEntry - Returns the debug information entry for the speciefied - /// debug variable. - DIEEntry *getDIEEntry(const MDNode *N) { - DenseMap<const MDNode *, DIEEntry *>::iterator I = - MDNodeToDIEEntryMap.find(N); - if (I == MDNodeToDIEEntryMap.end()) - return NULL; - return I->second; - } - - /// insertDIEEntry - Insert debug information entry into the map. - void insertDIEEntry(const MDNode *N, DIEEntry *E) { - MDNodeToDIEEntryMap.insert(std::make_pair(N, E)); - } - - /// addDie - Adds or interns the DIE to the compile unit. - /// - void addDie(DIE *Buffer) { - this->CUDie->addChild(Buffer); - } - - // getIndexTyDie - Get an anonymous type for index type. - DIE *getIndexTyDie() { - return IndexTyDie; - } - - // setIndexTyDie - Set D as anonymous type for index which can be reused - // later. - void setIndexTyDie(DIE *D) { - IndexTyDie = D; - } - -}; - -//===----------------------------------------------------------------------===// -/// DbgVariable - This class is used to track local variable information. -/// -class DbgVariable { - DIVariable Var; // Variable Descriptor. - DIE *TheDIE; // Variable DIE. - unsigned DotDebugLocOffset; // Offset in DotDebugLocEntries. -public: - // AbsVar may be NULL. - DbgVariable(DIVariable V) : Var(V), TheDIE(0), DotDebugLocOffset(~0U) {} - - // Accessors. - DIVariable getVariable() const { return Var; } - void setDIE(DIE *D) { TheDIE = D; } - DIE *getDIE() const { return TheDIE; } - void setDotDebugLocOffset(unsigned O) { DotDebugLocOffset = O; } - unsigned getDotDebugLocOffset() const { return DotDebugLocOffset; } - StringRef getName() const { return Var.getName(); } - unsigned getTag() const { return Var.getTag(); } - bool variableHasComplexAddress() const { - assert(Var.Verify() && "Invalid complex DbgVariable!"); - return Var.hasComplexAddress(); - } - bool isBlockByrefVariable() const { - assert(Var.Verify() && "Invalid complex DbgVariable!"); - return Var.isBlockByrefVariable(); - } - unsigned getNumAddrElements() const { - assert(Var.Verify() && "Invalid complex DbgVariable!"); - return Var.getNumAddrElements(); - } - uint64_t getAddrElement(unsigned i) const { - return Var.getAddrElement(i); - } - DIType getType() const { - DIType Ty = Var.getType(); - // FIXME: isBlockByrefVariable should be reformulated in terms of complex - // addresses instead. - if (Var.isBlockByrefVariable()) { - /* Byref variables, in Blocks, are declared by the programmer as - "SomeType VarName;", but the compiler creates a - __Block_byref_x_VarName struct, and gives the variable VarName - either the struct, or a pointer to the struct, as its type. This - is necessary for various behind-the-scenes things the compiler - needs to do with by-reference variables in blocks. - - However, as far as the original *programmer* is concerned, the - variable should still have type 'SomeType', as originally declared. - - The following function dives into the __Block_byref_x_VarName - struct to find the original type of the variable. This will be - passed back to the code generating the type for the Debug - Information Entry for the variable 'VarName'. 'VarName' will then - have the original type 'SomeType' in its debug information. - - The original type 'SomeType' will be the type of the field named - 'VarName' inside the __Block_byref_x_VarName struct. - - NOTE: In order for this to not completely fail on the debugger - side, the Debug Information Entry for the variable VarName needs to - have a DW_AT_location that tells the debugger how to unwind through - the pointers and __Block_byref_x_VarName struct to find the actual - value of the variable. The function addBlockByrefType does this. */ - DIType subType = Ty; - unsigned tag = Ty.getTag(); - - if (tag == dwarf::DW_TAG_pointer_type) { - DIDerivedType DTy = DIDerivedType(Ty); - subType = DTy.getTypeDerivedFrom(); - } - - DICompositeType blockStruct = DICompositeType(subType); - DIArray Elements = blockStruct.getTypeArray(); - - for (unsigned i = 0, N = Elements.getNumElements(); i < N; ++i) { - DIDescriptor Element = Elements.getElement(i); - DIDerivedType DT = DIDerivedType(Element); - if (getName() == DT.getName()) - return (DT.getTypeDerivedFrom()); - } - return Ty; +DIType DbgVariable::getType() const { + DIType Ty = Var.getType(); + // FIXME: isBlockByrefVariable should be reformulated in terms of complex + // addresses instead. + if (Var.isBlockByrefVariable()) { + /* Byref variables, in Blocks, are declared by the programmer as + "SomeType VarName;", but the compiler creates a + __Block_byref_x_VarName struct, and gives the variable VarName + either the struct, or a pointer to the struct, as its type. This + is necessary for various behind-the-scenes things the compiler + needs to do with by-reference variables in blocks. + + However, as far as the original *programmer* is concerned, the + variable should still have type 'SomeType', as originally declared. + + The following function dives into the __Block_byref_x_VarName + struct to find the original type of the variable. This will be + passed back to the code generating the type for the Debug + Information Entry for the variable 'VarName'. 'VarName' will then + have the original type 'SomeType' in its debug information. + + The original type 'SomeType' will be the type of the field named + 'VarName' inside the __Block_byref_x_VarName struct. + + NOTE: In order for this to not completely fail on the debugger + side, the Debug Information Entry for the variable VarName needs to + have a DW_AT_location that tells the debugger how to unwind through + the pointers and __Block_byref_x_VarName struct to find the actual + value of the variable. The function addBlockByrefType does this. */ + DIType subType = Ty; + unsigned tag = Ty.getTag(); + + if (tag == dwarf::DW_TAG_pointer_type) { + DIDerivedType DTy = DIDerivedType(Ty); + subType = DTy.getTypeDerivedFrom(); + } + + DICompositeType blockStruct = DICompositeType(subType); + DIArray Elements = blockStruct.getTypeArray(); + + for (unsigned i = 0, N = Elements.getNumElements(); i < N; ++i) { + DIDescriptor Element = Elements.getElement(i); + DIDerivedType DT = DIDerivedType(Element); + if (getName() == DT.getName()) + return (DT.getTypeDerivedFrom()); } return Ty; } -}; + return Ty; +} //===----------------------------------------------------------------------===// /// DbgRange - This is used to track range of instructions with identical @@ -392,19 +256,16 @@ DwarfDebug::DwarfDebug(AsmPrinter *A, Module *M) CurrentFnDbgScope(0), PrevLabel(NULL) { NextStringPoolNumber = 0; - DwarfFrameSectionSym = DwarfInfoSectionSym = DwarfAbbrevSectionSym = 0; + DwarfInfoSectionSym = DwarfAbbrevSectionSym = 0; DwarfStrSectionSym = TextSectionSym = 0; DwarfDebugRangeSectionSym = DwarfDebugLocSectionSym = 0; FunctionBeginSym = FunctionEndSym = 0; - DIEIntegerOne = new (DIEValueAllocator) DIEInteger(1); { NamedRegionTimer T(DbgTimerName, DWARFGroupName, TimePassesIsEnabled); beginModule(M); } } DwarfDebug::~DwarfDebug() { - for (unsigned j = 0, M = DIEBlocks.size(); j < M; ++j) - DIEBlocks[j]->~DIEBlock(); } MCSymbol *DwarfDebug::getStringPoolEntry(StringRef Str) { @@ -439,858 +300,6 @@ void DwarfDebug::assignAbbrevNumber(DIEAbbrev &Abbrev) { } } -/// createDIEEntry - Creates a new DIEEntry to be a proxy for a debug -/// information entry. -DIEEntry *DwarfDebug::createDIEEntry(DIE *Entry) { - DIEEntry *Value = new (DIEValueAllocator) DIEEntry(Entry); - return Value; -} - -/// addUInt - Add an unsigned integer attribute data and value. -/// -void DwarfDebug::addUInt(DIE *Die, unsigned Attribute, - unsigned Form, uint64_t Integer) { - if (!Form) Form = DIEInteger::BestForm(false, Integer); - DIEValue *Value = Integer == 1 ? - DIEIntegerOne : new (DIEValueAllocator) DIEInteger(Integer); - Die->addValue(Attribute, Form, Value); -} - -/// addSInt - Add an signed integer attribute data and value. -/// -void DwarfDebug::addSInt(DIE *Die, unsigned Attribute, - unsigned Form, int64_t Integer) { - if (!Form) Form = DIEInteger::BestForm(true, Integer); - DIEValue *Value = new (DIEValueAllocator) DIEInteger(Integer); - Die->addValue(Attribute, Form, Value); -} - -/// addString - Add a string attribute data and value. DIEString only -/// keeps string reference. -void DwarfDebug::addString(DIE *Die, unsigned Attribute, unsigned Form, - StringRef String) { - DIEValue *Value = new (DIEValueAllocator) DIEString(String); - Die->addValue(Attribute, Form, Value); -} - -/// addLabel - Add a Dwarf label attribute data and value. -/// -void DwarfDebug::addLabel(DIE *Die, unsigned Attribute, unsigned Form, - const MCSymbol *Label) { - DIEValue *Value = new (DIEValueAllocator) DIELabel(Label); - Die->addValue(Attribute, Form, Value); -} - -/// addDelta - Add a label delta attribute data and value. -/// -void DwarfDebug::addDelta(DIE *Die, unsigned Attribute, unsigned Form, - const MCSymbol *Hi, const MCSymbol *Lo) { - DIEValue *Value = new (DIEValueAllocator) DIEDelta(Hi, Lo); - Die->addValue(Attribute, Form, Value); -} - -/// addDIEEntry - Add a DIE attribute data and value. -/// -void DwarfDebug::addDIEEntry(DIE *Die, unsigned Attribute, unsigned Form, - DIE *Entry) { - Die->addValue(Attribute, Form, createDIEEntry(Entry)); -} - - -/// addBlock - Add block data. -/// -void DwarfDebug::addBlock(DIE *Die, unsigned Attribute, unsigned Form, - DIEBlock *Block) { - Block->ComputeSize(Asm); - DIEBlocks.push_back(Block); // Memoize so we can call the destructor later on. - Die->addValue(Attribute, Block->BestForm(), Block); -} - -/// addSourceLine - Add location information to specified debug information -/// entry. -void DwarfDebug::addSourceLine(DIE *Die, DIVariable V) { - // Verify variable. - if (!V.Verify()) - return; - - unsigned Line = V.getLineNumber(); - if (Line == 0) - return; - unsigned FileID = GetOrCreateSourceID(V.getContext().getFilename(), - V.getContext().getDirectory()); - assert(FileID && "Invalid file id"); - addUInt(Die, dwarf::DW_AT_decl_file, 0, FileID); - addUInt(Die, dwarf::DW_AT_decl_line, 0, Line); -} - -/// addSourceLine - Add location information to specified debug information -/// entry. -void DwarfDebug::addSourceLine(DIE *Die, DIGlobalVariable G) { - // Verify global variable. - if (!G.Verify()) - return; - - unsigned Line = G.getLineNumber(); - if (Line == 0) - return; - unsigned FileID = GetOrCreateSourceID(G.getContext().getFilename(), - G.getContext().getDirectory()); - assert(FileID && "Invalid file id"); - addUInt(Die, dwarf::DW_AT_decl_file, 0, FileID); - addUInt(Die, dwarf::DW_AT_decl_line, 0, Line); -} - -/// addSourceLine - Add location information to specified debug information -/// entry. -void DwarfDebug::addSourceLine(DIE *Die, DISubprogram SP) { - // Verify subprogram. - if (!SP.Verify()) - return; - // If the line number is 0, don't add it. - if (SP.getLineNumber() == 0) - return; - - unsigned Line = SP.getLineNumber(); - if (!SP.getContext().Verify()) - return; - unsigned FileID = GetOrCreateSourceID(SP.getFilename(), SP.getDirectory()); - assert(FileID && "Invalid file id"); - addUInt(Die, dwarf::DW_AT_decl_file, 0, FileID); - addUInt(Die, dwarf::DW_AT_decl_line, 0, Line); -} - -/// addSourceLine - Add location information to specified debug information -/// entry. -void DwarfDebug::addSourceLine(DIE *Die, DIType Ty) { - // Verify type. - if (!Ty.Verify()) - return; - - unsigned Line = Ty.getLineNumber(); - if (Line == 0 || !Ty.getContext().Verify()) - return; - unsigned FileID = GetOrCreateSourceID(Ty.getFilename(), Ty.getDirectory()); - assert(FileID && "Invalid file id"); - addUInt(Die, dwarf::DW_AT_decl_file, 0, FileID); - addUInt(Die, dwarf::DW_AT_decl_line, 0, Line); -} - -/// addSourceLine - Add location information to specified debug information -/// entry. -void DwarfDebug::addSourceLine(DIE *Die, DINameSpace NS) { - // Verify namespace. - if (!NS.Verify()) - return; - - unsigned Line = NS.getLineNumber(); - if (Line == 0) - return; - StringRef FN = NS.getFilename(); - - unsigned FileID = GetOrCreateSourceID(FN, NS.getDirectory()); - assert(FileID && "Invalid file id"); - addUInt(Die, dwarf::DW_AT_decl_file, 0, FileID); - addUInt(Die, dwarf::DW_AT_decl_line, 0, Line); -} - -/// addVariableAddress - Add DW_AT_location attribute for a DbgVariable based -/// on provided frame index. -void DwarfDebug::addVariableAddress(DbgVariable *&DV, DIE *Die, int64_t FI) { - MachineLocation Location; - unsigned FrameReg; - const TargetFrameLowering *TFI = Asm->TM.getFrameLowering(); - int Offset = TFI->getFrameIndexReference(*Asm->MF, FI, FrameReg); - Location.set(FrameReg, Offset); - - 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); -} - -/// addComplexAddress - 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 DIVariable, starting from -/// the starting location. Add the DWARF information to the die. -/// -void DwarfDebug::addComplexAddress(DbgVariable *&DV, DIE *Die, - unsigned Attribute, - const MachineLocation &Location) { - DIType Ty = DV->getType(); - - // Decode the original location, and use that as the start of the byref - // variable's location. - const TargetRegisterInfo *RI = Asm->TM.getRegisterInfo(); - unsigned Reg = RI->getDwarfRegNum(Location.getReg(), false); - DIEBlock *Block = new (DIEValueAllocator) DIEBlock(); - - if (Location.isReg()) { - if (Reg < 32) { - addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_reg0 + Reg); - } else { - addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_regx); - addUInt(Block, 0, dwarf::DW_FORM_udata, Reg); - } - } else { - if (Reg < 32) - addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_breg0 + Reg); - else { - addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_bregx); - addUInt(Block, 0, dwarf::DW_FORM_udata, Reg); - } - - addUInt(Block, 0, dwarf::DW_FORM_sdata, Location.getOffset()); - } - - for (unsigned i = 0, N = DV->getNumAddrElements(); i < N; ++i) { - uint64_t Element = DV->getAddrElement(i); - - if (Element == DIBuilder::OpPlus) { - addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_plus_uconst); - addUInt(Block, 0, dwarf::DW_FORM_udata, DV->getAddrElement(++i)); - } else if (Element == DIBuilder::OpDeref) { - addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_deref); - } else llvm_unreachable("unknown DIBuilder Opcode"); - } - - // Now attach the location information to the DIE. - addBlock(Die, Attribute, 0, Block); -} - -/* Byref variables, in Blocks, are declared by the programmer as "SomeType - VarName;", but the compiler creates a __Block_byref_x_VarName struct, and - gives the variable VarName either the struct, or a pointer to the struct, as - its type. This is necessary for various behind-the-scenes things the - compiler needs to do with by-reference variables in Blocks. - - However, as far as the original *programmer* is concerned, the variable - should still have type 'SomeType', as originally declared. - - The function getBlockByrefType dives into the __Block_byref_x_VarName - struct to find the original type of the variable, which is then assigned to - the variable's Debug Information Entry as its real type. So far, so good. - However now the debugger will expect the variable VarName to have the type - SomeType. So we need the location attribute for the variable to be an - expression that explains to the debugger how to navigate through the - pointers and struct to find the actual variable of type SomeType. - - The following function does just that. We start by getting - the "normal" location for the variable. This will be the location - of either the struct __Block_byref_x_VarName or the pointer to the - struct __Block_byref_x_VarName. - - The struct will look something like: - - struct __Block_byref_x_VarName { - ... <various fields> - struct __Block_byref_x_VarName *forwarding; - ... <various other fields> - SomeType VarName; - ... <maybe more fields> - }; - - If we are given the struct directly (as our starting point) we - need to tell the debugger to: - - 1). Add the offset of the forwarding field. - - 2). Follow that pointer to get the real __Block_byref_x_VarName - struct to use (the real one may have been copied onto the heap). - - 3). Add the offset for the field VarName, to find the actual variable. - - If we started with a pointer to the struct, then we need to - dereference that pointer first, before the other steps. - Translating this into DWARF ops, we will need to append the following - to the current location description for the variable: - - DW_OP_deref -- optional, if we start with a pointer - DW_OP_plus_uconst <forward_fld_offset> - DW_OP_deref - DW_OP_plus_uconst <varName_fld_offset> - - That is what this function does. */ - -/// addBlockByrefAddress - Start with the address based on the location -/// provided, and generate the DWARF information necessary to find the -/// actual Block variable (navigating the Block struct) based on the -/// starting location. Add the DWARF information to the die. For -/// more information, read large comment just above here. -/// -void DwarfDebug::addBlockByrefAddress(DbgVariable *&DV, DIE *Die, - unsigned Attribute, - const MachineLocation &Location) { - DIType Ty = DV->getType(); - DIType TmpTy = Ty; - unsigned Tag = Ty.getTag(); - bool isPointer = false; - - StringRef varName = DV->getName(); - - if (Tag == dwarf::DW_TAG_pointer_type) { - DIDerivedType DTy = DIDerivedType(Ty); - TmpTy = DTy.getTypeDerivedFrom(); - isPointer = true; - } - - DICompositeType blockStruct = DICompositeType(TmpTy); - - // Find the __forwarding field and the variable field in the __Block_byref - // struct. - DIArray Fields = blockStruct.getTypeArray(); - DIDescriptor varField = DIDescriptor(); - DIDescriptor forwardingField = DIDescriptor(); - - for (unsigned i = 0, N = Fields.getNumElements(); i < N; ++i) { - DIDescriptor Element = Fields.getElement(i); - DIDerivedType DT = DIDerivedType(Element); - StringRef fieldName = DT.getName(); - if (fieldName == "__forwarding") - forwardingField = Element; - else if (fieldName == varName) - varField = Element; - } - - // Get the offsets for the forwarding field and the variable field. - unsigned forwardingFieldOffset = - DIDerivedType(forwardingField).getOffsetInBits() >> 3; - unsigned varFieldOffset = - DIDerivedType(varField).getOffsetInBits() >> 3; - - // Decode the original location, and use that as the start of the byref - // variable's location. - const TargetRegisterInfo *RI = Asm->TM.getRegisterInfo(); - unsigned Reg = RI->getDwarfRegNum(Location.getReg(), false); - DIEBlock *Block = new (DIEValueAllocator) DIEBlock(); - - if (Location.isReg()) { - if (Reg < 32) - addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_reg0 + Reg); - else { - addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_regx); - addUInt(Block, 0, dwarf::DW_FORM_udata, Reg); - } - } else { - if (Reg < 32) - addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_breg0 + Reg); - else { - addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_bregx); - addUInt(Block, 0, dwarf::DW_FORM_udata, Reg); - } - - addUInt(Block, 0, dwarf::DW_FORM_sdata, Location.getOffset()); - } - - // If we started with a pointer to the __Block_byref... struct, then - // the first thing we need to do is dereference the pointer (DW_OP_deref). - if (isPointer) - addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_deref); - - // Next add the offset for the '__forwarding' field: - // DW_OP_plus_uconst ForwardingFieldOffset. Note there's no point in - // adding the offset if it's 0. - if (forwardingFieldOffset > 0) { - addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_plus_uconst); - addUInt(Block, 0, dwarf::DW_FORM_udata, forwardingFieldOffset); - } - - // Now dereference the __forwarding field to get to the real __Block_byref - // struct: DW_OP_deref. - addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_deref); - - // Now that we've got the real __Block_byref... struct, add the offset - // for the variable's field to get to the location of the actual variable: - // DW_OP_plus_uconst varFieldOffset. Again, don't add if it's 0. - if (varFieldOffset > 0) { - addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_plus_uconst); - addUInt(Block, 0, dwarf::DW_FORM_udata, varFieldOffset); - } - - // Now attach the location information to the DIE. - addBlock(Die, Attribute, 0, Block); -} - -/// addAddress - Add an address attribute to a die based on the location -/// provided. -void DwarfDebug::addAddress(DIE *Die, unsigned Attribute, - const MachineLocation &Location) { - const TargetRegisterInfo *RI = Asm->TM.getRegisterInfo(); - unsigned Reg = RI->getDwarfRegNum(Location.getReg(), false); - DIEBlock *Block = new (DIEValueAllocator) DIEBlock(); - - if (RI->getFrameRegister(*Asm->MF) == Location.getReg() - && Location.getOffset()) { - // If variable offset is based in frame register then use fbreg. - addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_fbreg); - addSInt(Block, 0, dwarf::DW_FORM_sdata, Location.getOffset()); - addBlock(Die, Attribute, 0, Block); - return; - } - - if (Location.isReg()) { - if (Reg < 32) { - addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_reg0 + Reg); - } else { - addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_regx); - addUInt(Block, 0, dwarf::DW_FORM_udata, Reg); - } - } else { - if (Reg < 32) { - addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_breg0 + Reg); - } else { - addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_bregx); - addUInt(Block, 0, dwarf::DW_FORM_udata, Reg); - } - - addUInt(Block, 0, dwarf::DW_FORM_sdata, Location.getOffset()); - } - - addBlock(Die, Attribute, 0, Block); -} - -/// addRegisterAddress - Add register location entry in variable DIE. -bool DwarfDebug::addRegisterAddress(DIE *Die, const MachineOperand &MO) { - assert (MO.isReg() && "Invalid machine operand!"); - if (!MO.getReg()) - return false; - MachineLocation Location; - Location.set(MO.getReg()); - addAddress(Die, dwarf::DW_AT_location, Location); - return true; -} - -/// addConstantValue - Add constant value entry in variable DIE. -bool DwarfDebug::addConstantValue(DIE *Die, const MachineOperand &MO) { - assert (MO.isImm() && "Invalid machine operand!"); - DIEBlock *Block = new (DIEValueAllocator) DIEBlock(); - unsigned Imm = MO.getImm(); - addUInt(Block, 0, dwarf::DW_FORM_udata, Imm); - addBlock(Die, dwarf::DW_AT_const_value, 0, Block); - return true; -} - -/// addConstantFPValue - Add constant value entry in variable DIE. -bool DwarfDebug::addConstantFPValue(DIE *Die, const MachineOperand &MO) { - assert (MO.isFPImm() && "Invalid machine operand!"); - DIEBlock *Block = new (DIEValueAllocator) DIEBlock(); - APFloat FPImm = MO.getFPImm()->getValueAPF(); - - // Get the raw data form of the floating point. - const APInt FltVal = FPImm.bitcastToAPInt(); - const char *FltPtr = (const char*)FltVal.getRawData(); - - int NumBytes = FltVal.getBitWidth() / 8; // 8 bits per byte. - bool LittleEndian = Asm->getTargetData().isLittleEndian(); - int Incr = (LittleEndian ? 1 : -1); - int Start = (LittleEndian ? 0 : NumBytes - 1); - int Stop = (LittleEndian ? NumBytes : -1); - - // Output the constant to DWARF one byte at a time. - for (; Start != Stop; Start += Incr) - addUInt(Block, 0, dwarf::DW_FORM_data1, - (unsigned char)0xFF & FltPtr[Start]); - - addBlock(Die, dwarf::DW_AT_const_value, 0, Block); - return true; -} - -/// addConstantValue - Add constant value entry in variable DIE. -bool DwarfDebug::addConstantValue(DIE *Die, ConstantInt *CI, - bool Unsigned) { - if (CI->getBitWidth() <= 64) { - if (Unsigned) - addUInt(Die, dwarf::DW_AT_const_value, dwarf::DW_FORM_udata, - CI->getZExtValue()); - else - addSInt(Die, dwarf::DW_AT_const_value, dwarf::DW_FORM_sdata, - CI->getSExtValue()); - return true; - } - - DIEBlock *Block = new (DIEValueAllocator) DIEBlock(); - - // Get the raw data form of the large APInt. - const APInt Val = CI->getValue(); - const char *Ptr = (const char*)Val.getRawData(); - - int NumBytes = Val.getBitWidth() / 8; // 8 bits per byte. - bool LittleEndian = Asm->getTargetData().isLittleEndian(); - int Incr = (LittleEndian ? 1 : -1); - int Start = (LittleEndian ? 0 : NumBytes - 1); - int Stop = (LittleEndian ? NumBytes : -1); - - // Output the constant to DWARF one byte at a time. - for (; Start != Stop; Start += Incr) - addUInt(Block, 0, dwarf::DW_FORM_data1, - (unsigned char)0xFF & Ptr[Start]); - - addBlock(Die, dwarf::DW_AT_const_value, 0, Block); - return true; -} - -/// addTemplateParams - Add template parameters in buffer. -void DwarfDebug::addTemplateParams(DIE &Buffer, DIArray TParams) { - // Add template parameters. - for (unsigned i = 0, e = TParams.getNumElements(); i != e; ++i) { - DIDescriptor Element = TParams.getElement(i); - if (Element.isTemplateTypeParameter()) - Buffer.addChild(getOrCreateTemplateTypeParameterDIE( - DITemplateTypeParameter(Element))); - else if (Element.isTemplateValueParameter()) - Buffer.addChild(getOrCreateTemplateValueParameterDIE( - DITemplateValueParameter(Element))); - } - -} -/// addToContextOwner - Add Die into the list of its context owner's children. -void DwarfDebug::addToContextOwner(DIE *Die, DIDescriptor Context) { - if (Context.isType()) { - DIE *ContextDIE = getOrCreateTypeDIE(DIType(Context)); - ContextDIE->addChild(Die); - } else if (Context.isNameSpace()) { - DIE *ContextDIE = getOrCreateNameSpace(DINameSpace(Context)); - ContextDIE->addChild(Die); - } else if (Context.isSubprogram()) { - DIE *ContextDIE = createSubprogramDIE(DISubprogram(Context)); - ContextDIE->addChild(Die); - } else if (DIE *ContextDIE = getCompileUnit(Context)->getDIE(Context)) - ContextDIE->addChild(Die); - else - getCompileUnit(Context)->addDie(Die); -} - -/// getOrCreateTypeDIE - Find existing DIE or create new DIE for the -/// given DIType. -DIE *DwarfDebug::getOrCreateTypeDIE(DIType Ty) { - CompileUnit *TypeCU = getCompileUnit(Ty); - DIE *TyDIE = TypeCU->getDIE(Ty); - if (TyDIE) - return TyDIE; - - // Create new type. - TyDIE = new DIE(dwarf::DW_TAG_base_type); - TypeCU->insertDIE(Ty, TyDIE); - if (Ty.isBasicType()) - constructTypeDIE(*TyDIE, DIBasicType(Ty)); - else if (Ty.isCompositeType()) - constructTypeDIE(*TyDIE, DICompositeType(Ty)); - else { - assert(Ty.isDerivedType() && "Unknown kind of DIType"); - constructTypeDIE(*TyDIE, DIDerivedType(Ty)); - } - - addToContextOwner(TyDIE, Ty.getContext()); - return TyDIE; -} - -/// addType - Add a new type attribute to the specified entity. -void DwarfDebug::addType(DIE *Entity, DIType Ty) { - if (!Ty.Verify()) - return; - - // Check for pre-existence. - CompileUnit *TypeCU = getCompileUnit(Ty); - DIEEntry *Entry = TypeCU->getDIEEntry(Ty); - // If it exists then use the existing value. - if (Entry) { - Entity->addValue(dwarf::DW_AT_type, dwarf::DW_FORM_ref4, Entry); - return; - } - - // Construct type. - DIE *Buffer = getOrCreateTypeDIE(Ty); - - // Set up proxy. - Entry = createDIEEntry(Buffer); - TypeCU->insertDIEEntry(Ty, Entry); - - Entity->addValue(dwarf::DW_AT_type, dwarf::DW_FORM_ref4, Entry); -} - -/// constructTypeDIE - Construct basic type die from DIBasicType. -void DwarfDebug::constructTypeDIE(DIE &Buffer, DIBasicType BTy) { - // Get core information. - StringRef Name = BTy.getName(); - Buffer.setTag(dwarf::DW_TAG_base_type); - addUInt(&Buffer, dwarf::DW_AT_encoding, dwarf::DW_FORM_data1, - BTy.getEncoding()); - - // Add name if not anonymous or intermediate type. - if (!Name.empty()) - addString(&Buffer, dwarf::DW_AT_name, dwarf::DW_FORM_string, Name); - uint64_t Size = BTy.getSizeInBits() >> 3; - addUInt(&Buffer, dwarf::DW_AT_byte_size, 0, Size); -} - -/// constructTypeDIE - Construct derived type die from DIDerivedType. -void DwarfDebug::constructTypeDIE(DIE &Buffer, DIDerivedType DTy) { - // Get core information. - StringRef Name = DTy.getName(); - uint64_t Size = DTy.getSizeInBits() >> 3; - unsigned Tag = DTy.getTag(); - - // FIXME - Workaround for templates. - if (Tag == dwarf::DW_TAG_inheritance) Tag = dwarf::DW_TAG_reference_type; - - Buffer.setTag(Tag); - - // Map to main type, void will not have a type. - DIType FromTy = DTy.getTypeDerivedFrom(); - addType(&Buffer, FromTy); - - // Add name if not anonymous or intermediate type. - if (!Name.empty()) - addString(&Buffer, dwarf::DW_AT_name, dwarf::DW_FORM_string, Name); - - // Add size if non-zero (derived types might be zero-sized.) - if (Size) - addUInt(&Buffer, dwarf::DW_AT_byte_size, 0, Size); - - // Add source line info if available and TyDesc is not a forward declaration. - if (!DTy.isForwardDecl()) - addSourceLine(&Buffer, DTy); -} - -/// constructTypeDIE - Construct type DIE from DICompositeType. -void DwarfDebug::constructTypeDIE(DIE &Buffer, DICompositeType CTy) { - // Get core information. - StringRef Name = CTy.getName(); - - uint64_t Size = CTy.getSizeInBits() >> 3; - unsigned Tag = CTy.getTag(); - Buffer.setTag(Tag); - - switch (Tag) { - case dwarf::DW_TAG_vector_type: - case dwarf::DW_TAG_array_type: - constructArrayTypeDIE(Buffer, &CTy); - break; - case dwarf::DW_TAG_enumeration_type: { - DIArray Elements = CTy.getTypeArray(); - - // Add enumerators to enumeration type. - for (unsigned i = 0, N = Elements.getNumElements(); i < N; ++i) { - DIE *ElemDie = NULL; - DIDescriptor Enum(Elements.getElement(i)); - if (Enum.isEnumerator()) { - ElemDie = constructEnumTypeDIE(DIEnumerator(Enum)); - Buffer.addChild(ElemDie); - } - } - } - break; - case dwarf::DW_TAG_subroutine_type: { - // Add return type. - DIArray Elements = CTy.getTypeArray(); - DIDescriptor RTy = Elements.getElement(0); - addType(&Buffer, DIType(RTy)); - - bool isPrototyped = true; - // Add arguments. - for (unsigned i = 1, N = Elements.getNumElements(); i < N; ++i) { - DIDescriptor Ty = Elements.getElement(i); - if (Ty.isUnspecifiedParameter()) { - DIE *Arg = new DIE(dwarf::DW_TAG_unspecified_parameters); - Buffer.addChild(Arg); - isPrototyped = false; - } else { - DIE *Arg = new DIE(dwarf::DW_TAG_formal_parameter); - addType(Arg, DIType(Ty)); - Buffer.addChild(Arg); - } - } - // Add prototype flag. - if (isPrototyped) - addUInt(&Buffer, dwarf::DW_AT_prototyped, dwarf::DW_FORM_flag, 1); - } - break; - case dwarf::DW_TAG_structure_type: - case dwarf::DW_TAG_union_type: - case dwarf::DW_TAG_class_type: { - // Add elements to structure type. - DIArray Elements = CTy.getTypeArray(); - - // A forward struct declared type may not have elements available. - unsigned N = Elements.getNumElements(); - if (N == 0) - break; - - // Add elements to structure type. - for (unsigned i = 0; i < N; ++i) { - DIDescriptor Element = Elements.getElement(i); - DIE *ElemDie = NULL; - if (Element.isSubprogram()) { - DISubprogram SP(Element); - ElemDie = createSubprogramDIE(DISubprogram(Element)); - if (SP.isProtected()) - addUInt(ElemDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_flag, - dwarf::DW_ACCESS_protected); - else if (SP.isPrivate()) - addUInt(ElemDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_flag, - dwarf::DW_ACCESS_private); - else - addUInt(ElemDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_flag, - dwarf::DW_ACCESS_public); - if (SP.isExplicit()) - addUInt(ElemDie, dwarf::DW_AT_explicit, dwarf::DW_FORM_flag, 1); - } - else if (Element.isVariable()) { - DIVariable DV(Element); - ElemDie = new DIE(dwarf::DW_TAG_variable); - addString(ElemDie, dwarf::DW_AT_name, dwarf::DW_FORM_string, - DV.getName()); - addType(ElemDie, DV.getType()); - addUInt(ElemDie, dwarf::DW_AT_declaration, dwarf::DW_FORM_flag, 1); - addUInt(ElemDie, dwarf::DW_AT_external, dwarf::DW_FORM_flag, 1); - addSourceLine(ElemDie, DV); - } else if (Element.isDerivedType()) - ElemDie = createMemberDIE(DIDerivedType(Element)); - else - continue; - Buffer.addChild(ElemDie); - } - - if (CTy.isAppleBlockExtension()) - addUInt(&Buffer, dwarf::DW_AT_APPLE_block, dwarf::DW_FORM_flag, 1); - - unsigned RLang = CTy.getRunTimeLang(); - if (RLang) - addUInt(&Buffer, dwarf::DW_AT_APPLE_runtime_class, - dwarf::DW_FORM_data1, RLang); - - DICompositeType ContainingType = CTy.getContainingType(); - if (DIDescriptor(ContainingType).isCompositeType()) - addDIEEntry(&Buffer, dwarf::DW_AT_containing_type, dwarf::DW_FORM_ref4, - getOrCreateTypeDIE(DIType(ContainingType))); - else { - DIDescriptor Context = CTy.getContext(); - addToContextOwner(&Buffer, Context); - } - - if (Tag == dwarf::DW_TAG_class_type) - addTemplateParams(Buffer, CTy.getTemplateParams()); - - break; - } - default: - break; - } - - // Add name if not anonymous or intermediate type. - if (!Name.empty()) - addString(&Buffer, dwarf::DW_AT_name, dwarf::DW_FORM_string, Name); - - if (Tag == dwarf::DW_TAG_enumeration_type || Tag == dwarf::DW_TAG_class_type - || Tag == dwarf::DW_TAG_structure_type || Tag == dwarf::DW_TAG_union_type) - { - // Add size if non-zero (derived types might be zero-sized.) - if (Size) - addUInt(&Buffer, dwarf::DW_AT_byte_size, 0, Size); - else { - // Add zero size if it is not a forward declaration. - if (CTy.isForwardDecl()) - addUInt(&Buffer, dwarf::DW_AT_declaration, dwarf::DW_FORM_flag, 1); - else - addUInt(&Buffer, dwarf::DW_AT_byte_size, 0, 0); - } - - // Add source line info if available. - if (!CTy.isForwardDecl()) - addSourceLine(&Buffer, CTy); - } -} - -/// getOrCreateTemplateTypeParameterDIE - Find existing DIE or create new DIE -/// for the given DITemplateTypeParameter. -DIE * -DwarfDebug::getOrCreateTemplateTypeParameterDIE(DITemplateTypeParameter TP) { - CompileUnit *TypeCU = getCompileUnit(TP); - DIE *ParamDIE = TypeCU->getDIE(TP); - if (ParamDIE) - return ParamDIE; - - ParamDIE = new DIE(dwarf::DW_TAG_template_type_parameter); - addType(ParamDIE, TP.getType()); - addString(ParamDIE, dwarf::DW_AT_name, dwarf::DW_FORM_string, TP.getName()); - return ParamDIE; -} - -/// getOrCreateTemplateValueParameterDIE - Find existing DIE or create new DIE -/// for the given DITemplateValueParameter. -DIE * -DwarfDebug::getOrCreateTemplateValueParameterDIE(DITemplateValueParameter TPV) { - CompileUnit *TVCU = getCompileUnit(TPV); - DIE *ParamDIE = TVCU->getDIE(TPV); - if (ParamDIE) - return ParamDIE; - - ParamDIE = new DIE(dwarf::DW_TAG_template_value_parameter); - addType(ParamDIE, TPV.getType()); - if (!TPV.getName().empty()) - addString(ParamDIE, dwarf::DW_AT_name, dwarf::DW_FORM_string, TPV.getName()); - addUInt(ParamDIE, dwarf::DW_AT_const_value, dwarf::DW_FORM_udata, - TPV.getValue()); - return ParamDIE; -} - -/// constructSubrangeDIE - Construct subrange DIE from DISubrange. -void DwarfDebug::constructSubrangeDIE(DIE &Buffer, DISubrange SR, DIE *IndexTy){ - int64_t L = SR.getLo(); - int64_t H = SR.getHi(); - DIE *DW_Subrange = new DIE(dwarf::DW_TAG_subrange_type); - - addDIEEntry(DW_Subrange, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, IndexTy); - if (L) - addSInt(DW_Subrange, dwarf::DW_AT_lower_bound, 0, L); - addSInt(DW_Subrange, dwarf::DW_AT_upper_bound, 0, H); - - Buffer.addChild(DW_Subrange); -} - -/// constructArrayTypeDIE - Construct array type DIE from DICompositeType. -void DwarfDebug::constructArrayTypeDIE(DIE &Buffer, - DICompositeType *CTy) { - Buffer.setTag(dwarf::DW_TAG_array_type); - if (CTy->getTag() == dwarf::DW_TAG_vector_type) - addUInt(&Buffer, dwarf::DW_AT_GNU_vector, dwarf::DW_FORM_flag, 1); - - // Emit derived type. - addType(&Buffer, CTy->getTypeDerivedFrom()); - DIArray Elements = CTy->getTypeArray(); - - // Get an anonymous type for index type. - CompileUnit *TheCU = getCompileUnit(*CTy); - DIE *IdxTy = TheCU->getIndexTyDie(); - if (!IdxTy) { - // Construct an anonymous type for index type. - IdxTy = new DIE(dwarf::DW_TAG_base_type); - addUInt(IdxTy, dwarf::DW_AT_byte_size, 0, sizeof(int32_t)); - addUInt(IdxTy, dwarf::DW_AT_encoding, dwarf::DW_FORM_data1, - dwarf::DW_ATE_signed); - TheCU->addDie(IdxTy); - TheCU->setIndexTyDie(IdxTy); - } - - // Add subranges to array type. - for (unsigned i = 0, N = Elements.getNumElements(); i < N; ++i) { - DIDescriptor Element = Elements.getElement(i); - if (Element.getTag() == dwarf::DW_TAG_subrange_type) - constructSubrangeDIE(Buffer, DISubrange(Element), IdxTy); - } -} - -/// constructEnumTypeDIE - Construct enum type DIE from DIEnumerator. -DIE *DwarfDebug::constructEnumTypeDIE(DIEnumerator ETy) { - DIE *Enumerator = new DIE(dwarf::DW_TAG_enumerator); - StringRef Name = ETy.getName(); - addString(Enumerator, dwarf::DW_AT_name, dwarf::DW_FORM_string, Name); - int64_t Value = ETy.getEnumValue(); - addSInt(Enumerator, dwarf::DW_AT_const_value, dwarf::DW_FORM_sdata, Value); - return Enumerator; -} - /// getRealLinkageName - If special LLVM prefix that is used to inform the asm /// printer to not emit usual symbol prefix before the symbol name is used then /// return linkage name after skipping this special LLVM prefix. @@ -1301,84 +310,6 @@ static StringRef getRealLinkageName(StringRef LinkageName) { return LinkageName; } -/// createMemberDIE - Create new member DIE. -DIE *DwarfDebug::createMemberDIE(DIDerivedType DT) { - DIE *MemberDie = new DIE(DT.getTag()); - StringRef Name = DT.getName(); - if (!Name.empty()) - addString(MemberDie, dwarf::DW_AT_name, dwarf::DW_FORM_string, Name); - - addType(MemberDie, DT.getTypeDerivedFrom()); - - addSourceLine(MemberDie, DT); - - DIEBlock *MemLocationDie = new (DIEValueAllocator) DIEBlock(); - addUInt(MemLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_plus_uconst); - - uint64_t Size = DT.getSizeInBits(); - uint64_t FieldSize = DT.getOriginalTypeSize(); - - if (Size != FieldSize) { - // Handle bitfield. - addUInt(MemberDie, dwarf::DW_AT_byte_size, 0, DT.getOriginalTypeSize()>>3); - addUInt(MemberDie, dwarf::DW_AT_bit_size, 0, DT.getSizeInBits()); - - uint64_t Offset = DT.getOffsetInBits(); - uint64_t AlignMask = ~(DT.getAlignInBits() - 1); - uint64_t HiMark = (Offset + FieldSize) & AlignMask; - uint64_t FieldOffset = (HiMark - FieldSize); - Offset -= FieldOffset; - - // Maybe we need to work from the other end. - if (Asm->getTargetData().isLittleEndian()) - Offset = FieldSize - (Offset + Size); - addUInt(MemberDie, dwarf::DW_AT_bit_offset, 0, Offset); - - // Here WD_AT_data_member_location points to the anonymous - // field that includes this bit field. - addUInt(MemLocationDie, 0, dwarf::DW_FORM_udata, FieldOffset >> 3); - - } else - // This is not a bitfield. - addUInt(MemLocationDie, 0, dwarf::DW_FORM_udata, DT.getOffsetInBits() >> 3); - - if (DT.getTag() == dwarf::DW_TAG_inheritance - && DT.isVirtual()) { - - // For C++, virtual base classes are not at fixed offset. Use following - // expression to extract appropriate offset from vtable. - // BaseAddr = ObAddr + *((*ObAddr) - Offset) - - DIEBlock *VBaseLocationDie = new (DIEValueAllocator) DIEBlock(); - addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_dup); - addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_deref); - addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_constu); - addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_udata, DT.getOffsetInBits()); - addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_minus); - addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_deref); - addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_plus); - - addBlock(MemberDie, dwarf::DW_AT_data_member_location, 0, - VBaseLocationDie); - } else - addBlock(MemberDie, dwarf::DW_AT_data_member_location, 0, MemLocationDie); - - if (DT.isProtected()) - addUInt(MemberDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_flag, - dwarf::DW_ACCESS_protected); - else if (DT.isPrivate()) - addUInt(MemberDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_flag, - dwarf::DW_ACCESS_private); - // Otherwise C++ member and base classes are considered public. - else if (DT.getCompileUnit().getLanguage() == dwarf::DW_LANG_C_plus_plus) - addUInt(MemberDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_flag, - dwarf::DW_ACCESS_public); - if (DT.isVirtual()) - addUInt(MemberDie, dwarf::DW_AT_virtuality, dwarf::DW_FORM_flag, - dwarf::DW_VIRTUALITY_virtual); - return MemberDie; -} - /// createSubprogramDIE - Create new DIE using SP. DIE *DwarfDebug::createSubprogramDIE(DISubprogram SP) { CompileUnit *SPCU = getCompileUnit(SP); @@ -1387,19 +318,35 @@ DIE *DwarfDebug::createSubprogramDIE(DISubprogram SP) { return SPDie; SPDie = new DIE(dwarf::DW_TAG_subprogram); - // Constructors and operators for anonymous aggregates do not have names. - if (!SP.getName().empty()) - addString(SPDie, dwarf::DW_AT_name, dwarf::DW_FORM_string, SP.getName()); + + // DW_TAG_inlined_subroutine may refer to this DIE. + SPCU->insertDIE(SP, SPDie); + + // Add to context owner. + SPCU->addToContextOwner(SPDie, SP.getContext()); + + // Add function template parameters. + SPCU->addTemplateParams(*SPDie, SP.getTemplateParams()); StringRef LinkageName = SP.getLinkageName(); if (!LinkageName.empty()) - addString(SPDie, dwarf::DW_AT_MIPS_linkage_name, dwarf::DW_FORM_string, - getRealLinkageName(LinkageName)); + SPCU->addString(SPDie, dwarf::DW_AT_MIPS_linkage_name, dwarf::DW_FORM_string, + getRealLinkageName(LinkageName)); - addSourceLine(SPDie, SP); + // If this DIE is going to refer declaration info using AT_specification + // then there is no need to add other attributes. + if (SP.getFunctionDeclaration().isSubprogram()) + return SPDie; + + // Constructors and operators for anonymous aggregates do not have names. + if (!SP.getName().empty()) + SPCU->addString(SPDie, dwarf::DW_AT_name, dwarf::DW_FORM_string, + SP.getName()); + + SPCU->addSourceLine(SPDie, SP); if (SP.isPrototyped()) - addUInt(SPDie, dwarf::DW_AT_prototyped, dwarf::DW_FORM_flag, 1); + SPCU->addUInt(SPDie, dwarf::DW_AT_prototyped, dwarf::DW_FORM_flag, 1); // Add Return Type. DICompositeType SPTy = SP.getType(); @@ -1407,24 +354,24 @@ DIE *DwarfDebug::createSubprogramDIE(DISubprogram SP) { unsigned SPTag = SPTy.getTag(); if (Args.getNumElements() == 0 || SPTag != dwarf::DW_TAG_subroutine_type) - addType(SPDie, SPTy); + SPCU->addType(SPDie, SPTy); else - addType(SPDie, DIType(Args.getElement(0))); + SPCU->addType(SPDie, DIType(Args.getElement(0))); unsigned VK = SP.getVirtuality(); if (VK) { - addUInt(SPDie, dwarf::DW_AT_virtuality, dwarf::DW_FORM_flag, VK); - DIEBlock *Block = new (DIEValueAllocator) DIEBlock(); - addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_constu); - addUInt(Block, 0, dwarf::DW_FORM_udata, SP.getVirtualIndex()); - addBlock(SPDie, dwarf::DW_AT_vtable_elem_location, 0, Block); + SPCU->addUInt(SPDie, dwarf::DW_AT_virtuality, dwarf::DW_FORM_flag, VK); + DIEBlock *Block = SPCU->getDIEBlock(); + SPCU->addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_constu); + SPCU->addUInt(Block, 0, dwarf::DW_FORM_udata, SP.getVirtualIndex()); + SPCU->addBlock(SPDie, dwarf::DW_AT_vtable_elem_location, 0, Block); ContainingTypeMap.insert(std::make_pair(SPDie, SP.getContainingType())); } if (!SP.isDefinition()) { - addUInt(SPDie, dwarf::DW_AT_declaration, dwarf::DW_FORM_flag, 1); - + SPCU->addUInt(SPDie, dwarf::DW_AT_declaration, dwarf::DW_FORM_flag, 1); + // Add arguments. Do not add arguments for subprogram definition. They will // be handled while processing variables. DICompositeType SPTy = SP.getType(); @@ -1435,35 +382,26 @@ DIE *DwarfDebug::createSubprogramDIE(DISubprogram SP) { for (unsigned i = 1, N = Args.getNumElements(); i < N; ++i) { DIE *Arg = new DIE(dwarf::DW_TAG_formal_parameter); DIType ATy = DIType(DIType(Args.getElement(i))); - addType(Arg, ATy); + SPCU->addType(Arg, ATy); if (ATy.isArtificial()) - addUInt(Arg, dwarf::DW_AT_artificial, dwarf::DW_FORM_flag, 1); + SPCU->addUInt(Arg, dwarf::DW_AT_artificial, dwarf::DW_FORM_flag, 1); SPDie->addChild(Arg); } } if (SP.isArtificial()) - addUInt(SPDie, dwarf::DW_AT_artificial, dwarf::DW_FORM_flag, 1); + SPCU->addUInt(SPDie, dwarf::DW_AT_artificial, dwarf::DW_FORM_flag, 1); if (!SP.isLocalToUnit()) - addUInt(SPDie, dwarf::DW_AT_external, dwarf::DW_FORM_flag, 1); + SPCU->addUInt(SPDie, dwarf::DW_AT_external, dwarf::DW_FORM_flag, 1); if (SP.isOptimized()) - addUInt(SPDie, dwarf::DW_AT_APPLE_optimized, dwarf::DW_FORM_flag, 1); + SPCU->addUInt(SPDie, dwarf::DW_AT_APPLE_optimized, dwarf::DW_FORM_flag, 1); if (unsigned isa = Asm->getISAEncoding()) { - addUInt(SPDie, dwarf::DW_AT_APPLE_isa, dwarf::DW_FORM_flag, isa); + SPCU->addUInt(SPDie, dwarf::DW_AT_APPLE_isa, dwarf::DW_FORM_flag, isa); } - // Add function template parameters. - addTemplateParams(*SPDie, SP.getTemplateParams()); - - // DW_TAG_inlined_subroutine may refer to this DIE. - SPCU->insertDIE(SP, SPDie); - - // Add to context owner. - addToContextOwner(SPDie, SP.getContext()); - return SPDie; } @@ -1518,51 +456,57 @@ DIE *DwarfDebug::updateSubprogramScopeDIE(const MDNode *SPNode) { assert(SPDie && "Unable to find subprogram DIE!"); DISubprogram SP(SPNode); - // There is not any need to generate specification DIE for a function - // defined at compile unit level. If a function is defined inside another - // function then gdb prefers the definition at top level and but does not - // expect specification DIE in parent function. So avoid creating - // specification DIE for a function defined inside a function. - if (SP.isDefinition() && !SP.getContext().isCompileUnit() && - !SP.getContext().isFile() && - !isSubprogramContext(SP.getContext())) { - addUInt(SPDie, dwarf::DW_AT_declaration, dwarf::DW_FORM_flag, 1); - - // Add arguments. - DICompositeType SPTy = SP.getType(); - DIArray Args = SPTy.getTypeArray(); - unsigned SPTag = SPTy.getTag(); - if (SPTag == dwarf::DW_TAG_subroutine_type) - for (unsigned i = 1, N = Args.getNumElements(); i < N; ++i) { - DIE *Arg = new DIE(dwarf::DW_TAG_formal_parameter); - DIType ATy = DIType(DIType(Args.getElement(i))); - addType(Arg, ATy); - if (ATy.isArtificial()) - addUInt(Arg, dwarf::DW_AT_artificial, dwarf::DW_FORM_flag, 1); - SPDie->addChild(Arg); - } - DIE *SPDeclDie = SPDie; - SPDie = new DIE(dwarf::DW_TAG_subprogram); - addDIEEntry(SPDie, dwarf::DW_AT_specification, dwarf::DW_FORM_ref4, - SPDeclDie); - SPCU->addDie(SPDie); + DISubprogram SPDecl = SP.getFunctionDeclaration(); + if (SPDecl.isSubprogram()) + // Refer function declaration directly. + SPCU->addDIEEntry(SPDie, dwarf::DW_AT_specification, dwarf::DW_FORM_ref4, + createSubprogramDIE(SPDecl)); + else { + // There is not any need to generate specification DIE for a function + // defined at compile unit level. If a function is defined inside another + // function then gdb prefers the definition at top level and but does not + // expect specification DIE in parent function. So avoid creating + // specification DIE for a function defined inside a function. + if (SP.isDefinition() && !SP.getContext().isCompileUnit() && + !SP.getContext().isFile() && + !isSubprogramContext(SP.getContext())) { + SPCU-> addUInt(SPDie, dwarf::DW_AT_declaration, dwarf::DW_FORM_flag, 1); + + // Add arguments. + DICompositeType SPTy = SP.getType(); + DIArray Args = SPTy.getTypeArray(); + unsigned SPTag = SPTy.getTag(); + if (SPTag == dwarf::DW_TAG_subroutine_type) + for (unsigned i = 1, N = Args.getNumElements(); i < N; ++i) { + DIE *Arg = new DIE(dwarf::DW_TAG_formal_parameter); + DIType ATy = DIType(DIType(Args.getElement(i))); + SPCU->addType(Arg, ATy); + if (ATy.isArtificial()) + SPCU->addUInt(Arg, dwarf::DW_AT_artificial, dwarf::DW_FORM_flag, 1); + SPDie->addChild(Arg); + } + DIE *SPDeclDie = SPDie; + SPDie = new DIE(dwarf::DW_TAG_subprogram); + SPCU->addDIEEntry(SPDie, dwarf::DW_AT_specification, dwarf::DW_FORM_ref4, + SPDeclDie); + SPCU->addDie(SPDie); + } } - // Pick up abstract subprogram DIE. if (DIE *AbsSPDIE = AbstractSPDies.lookup(SPNode)) { SPDie = new DIE(dwarf::DW_TAG_subprogram); - addDIEEntry(SPDie, dwarf::DW_AT_abstract_origin, - dwarf::DW_FORM_ref4, AbsSPDIE); + SPCU->addDIEEntry(SPDie, dwarf::DW_AT_abstract_origin, + dwarf::DW_FORM_ref4, AbsSPDIE); SPCU->addDie(SPDie); } - addLabel(SPDie, dwarf::DW_AT_low_pc, dwarf::DW_FORM_addr, - Asm->GetTempSymbol("func_begin", Asm->getFunctionNumber())); - addLabel(SPDie, dwarf::DW_AT_high_pc, dwarf::DW_FORM_addr, - Asm->GetTempSymbol("func_end", Asm->getFunctionNumber())); + SPCU->addLabel(SPDie, dwarf::DW_AT_low_pc, dwarf::DW_FORM_addr, + Asm->GetTempSymbol("func_begin", Asm->getFunctionNumber())); + SPCU->addLabel(SPDie, dwarf::DW_AT_high_pc, dwarf::DW_FORM_addr, + Asm->GetTempSymbol("func_end", Asm->getFunctionNumber())); const TargetRegisterInfo *RI = Asm->TM.getRegisterInfo(); MachineLocation Location(RI->getFrameRegister(*Asm->MF)); - addAddress(SPDie, dwarf::DW_AT_frame_base, Location); + SPCU->addAddress(SPDie, dwarf::DW_AT_frame_base, Location); return SPDie; } @@ -1579,13 +523,14 @@ DIE *DwarfDebug::constructLexicalScopeDIE(DbgScope *Scope) { if (Ranges.empty()) return 0; + CompileUnit *TheCU = getCompileUnit(Scope->getScopeNode()); SmallVector<DbgRange, 4>::const_iterator RI = Ranges.begin(); if (Ranges.size() > 1) { // .debug_range section has not been laid out yet. Emit offset in // .debug_range as a uint, size 4, for now. emitDIE will handle // DW_AT_ranges appropriately. - addUInt(ScopeDIE, dwarf::DW_AT_ranges, dwarf::DW_FORM_data4, - DebugRangeSymbols.size() * Asm->getTargetData().getPointerSize()); + TheCU->addUInt(ScopeDIE, dwarf::DW_AT_ranges, dwarf::DW_FORM_data4, + DebugRangeSymbols.size() * Asm->getTargetData().getPointerSize()); for (SmallVector<DbgRange, 4>::const_iterator RI = Ranges.begin(), RE = Ranges.end(); RI != RE; ++RI) { DebugRangeSymbols.push_back(getLabelBeforeInsn(RI->first)); @@ -1604,8 +549,8 @@ DIE *DwarfDebug::constructLexicalScopeDIE(DbgScope *Scope) { assert(Start->isDefined() && "Invalid starting label for an inlined scope!"); assert(End->isDefined() && "Invalid end label for an inlined scope!"); - addLabel(ScopeDIE, dwarf::DW_AT_low_pc, dwarf::DW_FORM_addr, Start); - addLabel(ScopeDIE, dwarf::DW_AT_high_pc, dwarf::DW_FORM_addr, End); + TheCU->addLabel(ScopeDIE, dwarf::DW_AT_low_pc, dwarf::DW_FORM_addr, Start); + TheCU->addLabel(ScopeDIE, dwarf::DW_AT_high_pc, dwarf::DW_FORM_addr, End); return ScopeDIE; } @@ -1639,17 +584,19 @@ DIE *DwarfDebug::constructInlinedScopeDIE(DbgScope *Scope) { if (!Scope->getScopeNode()) return NULL; DIScope DS(Scope->getScopeNode()); - DIE *ScopeDIE = new DIE(dwarf::DW_TAG_inlined_subroutine); - DISubprogram InlinedSP = getDISubprogram(DS); CompileUnit *TheCU = getCompileUnit(InlinedSP); DIE *OriginDIE = TheCU->getDIE(InlinedSP); - assert(OriginDIE && "Unable to find Origin DIE!"); - addDIEEntry(ScopeDIE, dwarf::DW_AT_abstract_origin, - dwarf::DW_FORM_ref4, OriginDIE); + if (!OriginDIE) { + DEBUG(dbgs() << "Unable to find original DIE for inlined subprogram."); + return NULL; + } + DIE *ScopeDIE = new DIE(dwarf::DW_TAG_inlined_subroutine); + TheCU->addDIEEntry(ScopeDIE, dwarf::DW_AT_abstract_origin, + dwarf::DW_FORM_ref4, OriginDIE); - addLabel(ScopeDIE, dwarf::DW_AT_low_pc, dwarf::DW_FORM_addr, StartLabel); - addLabel(ScopeDIE, dwarf::DW_AT_high_pc, dwarf::DW_FORM_addr, EndLabel); + TheCU->addLabel(ScopeDIE, dwarf::DW_AT_low_pc, dwarf::DW_FORM_addr, StartLabel); + TheCU->addLabel(ScopeDIE, dwarf::DW_AT_high_pc, dwarf::DW_FORM_addr, EndLabel); InlinedSubprogramDIEs.insert(OriginDIE); @@ -1665,8 +612,8 @@ DIE *DwarfDebug::constructInlinedScopeDIE(DbgScope *Scope) { I->second.push_back(std::make_pair(StartLabel, ScopeDIE)); DILocation DL(Scope->getInlinedAt()); - addUInt(ScopeDIE, dwarf::DW_AT_call_file, 0, TheCU->getID()); - addUInt(ScopeDIE, dwarf::DW_AT_call_line, 0, DL.getLineNumber()); + TheCU->addUInt(ScopeDIE, dwarf::DW_AT_call_file, 0, TheCU->getID()); + TheCU->addUInt(ScopeDIE, dwarf::DW_AT_call_line, 0, DL.getLineNumber()); return ScopeDIE; } @@ -1695,7 +642,7 @@ DIE *DwarfDebug::constructVariableDIE(DbgVariable *DV, DbgScope *Scope) { // Define variable debug information entry. DIE *VariableDie = new DIE(Tag); - + CompileUnit *VariableCU = getCompileUnit(DV->getVariable()); DIE *AbsDIE = NULL; DenseMap<const DbgVariable *, const DbgVariable *>::iterator V2AVI = VarToAbstractVarMap.find(DV); @@ -1703,20 +650,23 @@ DIE *DwarfDebug::constructVariableDIE(DbgVariable *DV, DbgScope *Scope) { AbsDIE = V2AVI->second->getDIE(); if (AbsDIE) - addDIEEntry(VariableDie, dwarf::DW_AT_abstract_origin, - dwarf::DW_FORM_ref4, AbsDIE); + VariableCU->addDIEEntry(VariableDie, dwarf::DW_AT_abstract_origin, + dwarf::DW_FORM_ref4, AbsDIE); else { - addString(VariableDie, dwarf::DW_AT_name, dwarf::DW_FORM_string, Name); - addSourceLine(VariableDie, DV->getVariable()); + VariableCU->addString(VariableDie, dwarf::DW_AT_name, dwarf::DW_FORM_string, + Name); + VariableCU->addSourceLine(VariableDie, DV->getVariable()); // Add variable type. - addType(VariableDie, DV->getType()); + VariableCU->addType(VariableDie, DV->getType()); } if (Tag == dwarf::DW_TAG_formal_parameter && DV->getType().isArtificial()) - addUInt(VariableDie, dwarf::DW_AT_artificial, dwarf::DW_FORM_flag, 1); + VariableCU->addUInt(VariableDie, dwarf::DW_AT_artificial, + dwarf::DW_FORM_flag, 1); else if (DIVariable(DV->getVariable()).isArtificial()) - addUInt(VariableDie, dwarf::DW_AT_artificial, dwarf::DW_FORM_flag, 1); + VariableCU->addUInt(VariableDie, dwarf::DW_AT_artificial, + dwarf::DW_FORM_flag, 1); if (Scope->isAbstractScope()) { DV->setDIE(VariableDie); @@ -1727,7 +677,7 @@ DIE *DwarfDebug::constructVariableDIE(DbgVariable *DV, DbgScope *Scope) { unsigned Offset = DV->getDotDebugLocOffset(); if (Offset != ~0U) { - addLabel(VariableDie, dwarf::DW_AT_location, dwarf::DW_FORM_data4, + VariableCU->addLabel(VariableDie, dwarf::DW_AT_location, dwarf::DW_FORM_data4, Asm->GetTempSymbol("debug_loc", Offset)); DV->setDIE(VariableDie); UseDotDebugLocEntry.insert(VariableDie); @@ -1747,22 +697,31 @@ DIE *DwarfDebug::constructVariableDIE(DbgVariable *DV, DbgScope *Scope) { const TargetRegisterInfo *TRI = Asm->TM.getRegisterInfo(); if (DVInsn->getOperand(1).isImm() && TRI->getFrameRegister(*Asm->MF) == RegOp.getReg()) { - addVariableAddress(DV, VariableDie, DVInsn->getOperand(1).getImm()); - updated = true; - } else - updated = addRegisterAddress(VariableDie, RegOp); + unsigned FrameReg = 0; + const TargetFrameLowering *TFI = Asm->TM.getFrameLowering(); + int Offset = + TFI->getFrameIndexReference(*Asm->MF, + DVInsn->getOperand(1).getImm(), + FrameReg); + MachineLocation Location(FrameReg, Offset); + VariableCU->addVariableAddress(DV, VariableDie, Location); + + } else if (RegOp.getReg()) + VariableCU->addVariableAddress(DV, VariableDie, + MachineLocation(RegOp.getReg())); + updated = true; } else if (DVInsn->getOperand(0).isImm()) - updated = addConstantValue(VariableDie, DVInsn->getOperand(0)); + updated = + VariableCU->addConstantValue(VariableDie, DVInsn->getOperand(0), + DV->getType()); else if (DVInsn->getOperand(0).isFPImm()) updated = - addConstantFPValue(VariableDie, DVInsn->getOperand(0)); + VariableCU->addConstantFPValue(VariableDie, DVInsn->getOperand(0)); } else { - MachineLocation Location = Asm->getDebugValueLocation(DVInsn); - if (Location.getReg()) { - addAddress(VariableDie, dwarf::DW_AT_location, Location); - updated = true; - } + VariableCU->addVariableAddress(DV, VariableDie, + Asm->getDebugValueLocation(DVInsn)); + updated = true; } if (!updated) { // If variableDie is not updated then DBG_VALUE instruction does not @@ -1776,35 +735,20 @@ DIE *DwarfDebug::constructVariableDIE(DbgVariable *DV, DbgScope *Scope) { // .. else use frame index, if available. int FI = 0; - if (findVariableFrameIndex(DV, &FI)) - addVariableAddress(DV, VariableDie, FI); - + if (findVariableFrameIndex(DV, &FI)) { + unsigned FrameReg = 0; + const TargetFrameLowering *TFI = Asm->TM.getFrameLowering(); + int Offset = + TFI->getFrameIndexReference(*Asm->MF, FI, FrameReg); + MachineLocation Location(FrameReg, Offset); + VariableCU->addVariableAddress(DV, VariableDie, Location); + } + DV->setDIE(VariableDie); return VariableDie; } -void DwarfDebug::addPubTypes(DISubprogram SP) { - DICompositeType SPTy = SP.getType(); - unsigned SPTag = SPTy.getTag(); - if (SPTag != dwarf::DW_TAG_subroutine_type) - return; - - DIArray Args = SPTy.getTypeArray(); - for (unsigned i = 0, e = Args.getNumElements(); i != e; ++i) { - DIType ATy(Args.getElement(i)); - if (!ATy.Verify()) - continue; - DICompositeType CATy = getDICompositeType(ATy); - if (DIDescriptor(CATy).Verify() && !CATy.getName().empty() - && !CATy.isForwardDecl()) { - CompileUnit *TheCU = getCompileUnit(CATy); - if (DIEEntry *Entry = TheCU->getDIEEntry(CATy)) - TheCU->addGlobalType(CATy.getName(), Entry->getEntry()); - } - } -} - /// constructScopeDIE - Construct a DIE for this scope. DIE *DwarfDebug::constructScopeDIE(DbgScope *Scope) { if (!Scope || !Scope->getScopeNode()) @@ -1858,7 +802,7 @@ DIE *DwarfDebug::constructScopeDIE(DbgScope *Scope) { ScopeDIE->addChild(*I); if (DS.isSubprogram()) - addPubTypes(DISubprogram(DS)); + getCompileUnit(DS)->addPubTypes(DISubprogram(DS)); return ScopeDIE; } @@ -1875,11 +819,9 @@ unsigned DwarfDebug::GetOrCreateSourceID(StringRef FileName, return GetOrCreateSourceID("<stdin>", StringRef()); // MCStream expects full path name as filename. - if (!DirName.empty() && !FileName.startswith("/")) { - std::string FullPathName(DirName.data()); - if (!DirName.endswith("/")) - FullPathName += "/"; - FullPathName += FileName.data(); + if (!DirName.empty() && !sys::path::is_absolute(FileName)) { + SmallString<128> FullPathName = DirName; + sys::path::append(FullPathName, FileName); // Here FullPathName will be copied into StringMap by GetOrCreateSourceID. return GetOrCreateSourceID(StringRef(FullPathName), StringRef()); } @@ -1897,21 +839,6 @@ unsigned DwarfDebug::GetOrCreateSourceID(StringRef FileName, return SrcId; } -/// getOrCreateNameSpace - Create a DIE for DINameSpace. -DIE *DwarfDebug::getOrCreateNameSpace(DINameSpace NS) { - CompileUnit *TheCU = getCompileUnit(NS); - DIE *NDie = TheCU->getDIE(NS); - if (NDie) - return NDie; - NDie = new DIE(dwarf::DW_TAG_namespace); - TheCU->insertDIE(NS, NDie); - if (!NS.getName().empty()) - addString(NDie, dwarf::DW_AT_name, dwarf::DW_FORM_string, NS.getName()); - addSourceLine(NDie, NS); - addToContextOwner(NDie, NS.getContext()); - return NDie; -} - /// constructCompileUnit - Create new CompileUnit for the given /// metadata node with tag DW_TAG_compile_unit. void DwarfDebug::constructCompileUnit(const MDNode *N) { @@ -1921,37 +848,37 @@ void DwarfDebug::constructCompileUnit(const MDNode *N) { unsigned ID = GetOrCreateSourceID(FN, Dir); DIE *Die = new DIE(dwarf::DW_TAG_compile_unit); - addString(Die, dwarf::DW_AT_producer, dwarf::DW_FORM_string, - DIUnit.getProducer()); - addUInt(Die, dwarf::DW_AT_language, dwarf::DW_FORM_data2, - DIUnit.getLanguage()); - addString(Die, dwarf::DW_AT_name, dwarf::DW_FORM_string, FN); + CompileUnit *NewCU = new CompileUnit(ID, Die, Asm, this); + NewCU->addString(Die, dwarf::DW_AT_producer, dwarf::DW_FORM_string, + DIUnit.getProducer()); + NewCU->addUInt(Die, dwarf::DW_AT_language, dwarf::DW_FORM_data2, + DIUnit.getLanguage()); + NewCU->addString(Die, dwarf::DW_AT_name, dwarf::DW_FORM_string, FN); // Use DW_AT_entry_pc instead of DW_AT_low_pc/DW_AT_high_pc pair. This // simplifies debug range entries. - addUInt(Die, dwarf::DW_AT_entry_pc, dwarf::DW_FORM_addr, 0); + NewCU->addUInt(Die, dwarf::DW_AT_entry_pc, dwarf::DW_FORM_addr, 0); // DW_AT_stmt_list is a offset of line number information for this // compile unit in debug_line section. - if (Asm->MAI->doesDwarfUsesAbsoluteLabelForStmtList()) - addLabel(Die, dwarf::DW_AT_stmt_list, dwarf::DW_FORM_addr, - Asm->GetTempSymbol("section_line")); + if(Asm->MAI->doesDwarfRequireRelocationForSectionOffset()) + NewCU->addLabel(Die, dwarf::DW_AT_stmt_list, dwarf::DW_FORM_data4, + Asm->GetTempSymbol("section_line")); else - addUInt(Die, dwarf::DW_AT_stmt_list, dwarf::DW_FORM_data4, 0); + NewCU->addUInt(Die, dwarf::DW_AT_stmt_list, dwarf::DW_FORM_data4, 0); if (!Dir.empty()) - addString(Die, dwarf::DW_AT_comp_dir, dwarf::DW_FORM_string, Dir); + NewCU->addString(Die, dwarf::DW_AT_comp_dir, dwarf::DW_FORM_string, Dir); if (DIUnit.isOptimized()) - addUInt(Die, dwarf::DW_AT_APPLE_optimized, dwarf::DW_FORM_flag, 1); + NewCU->addUInt(Die, dwarf::DW_AT_APPLE_optimized, dwarf::DW_FORM_flag, 1); StringRef Flags = DIUnit.getFlags(); if (!Flags.empty()) - addString(Die, dwarf::DW_AT_APPLE_flags, dwarf::DW_FORM_string, Flags); - + NewCU->addString(Die, dwarf::DW_AT_APPLE_flags, dwarf::DW_FORM_string, Flags); + unsigned RVer = DIUnit.getRunTimeVersion(); if (RVer) - addUInt(Die, dwarf::DW_AT_APPLE_major_runtime_vers, + NewCU->addUInt(Die, dwarf::DW_AT_APPLE_major_runtime_vers, dwarf::DW_FORM_data1, RVer); - CompileUnit *NewCU = new CompileUnit(ID, Die); if (!FirstCU) FirstCU = NewCU; CUMap.insert(std::make_pair(N, NewCU)); @@ -2047,38 +974,34 @@ void DwarfDebug::constructGlobalVariableDIE(const MDNode *N) { bool isGlobalVariable = GV.getGlobal() != NULL; // Add name. - addString(VariableDIE, dwarf::DW_AT_name, dwarf::DW_FORM_string, - GV.getDisplayName()); + TheCU->addString(VariableDIE, dwarf::DW_AT_name, dwarf::DW_FORM_string, + GV.getDisplayName()); StringRef LinkageName = GV.getLinkageName(); if (!LinkageName.empty() && isGlobalVariable) - addString(VariableDIE, dwarf::DW_AT_MIPS_linkage_name, dwarf::DW_FORM_string, - getRealLinkageName(LinkageName)); + TheCU->addString(VariableDIE, dwarf::DW_AT_MIPS_linkage_name, + dwarf::DW_FORM_string, + getRealLinkageName(LinkageName)); // Add type. - addType(VariableDIE, GTy); - if (GTy.isCompositeType() && !GTy.getName().empty() - && !GTy.isForwardDecl()) { - DIEEntry *Entry = TheCU->getDIEEntry(GTy); - assert(Entry && "Missing global type!"); - TheCU->addGlobalType(GTy.getName(), Entry->getEntry()); - } + TheCU->addType(VariableDIE, GTy); + // Add scoping info. if (!GV.isLocalToUnit()) { - addUInt(VariableDIE, dwarf::DW_AT_external, dwarf::DW_FORM_flag, 1); + TheCU->addUInt(VariableDIE, dwarf::DW_AT_external, dwarf::DW_FORM_flag, 1); // Expose as global. TheCU->addGlobal(GV.getName(), VariableDIE); } // Add line number info. - addSourceLine(VariableDIE, GV); + TheCU->addSourceLine(VariableDIE, GV); // Add to map. TheCU->insertDIE(N, VariableDIE); // Add to context owner. DIDescriptor GVContext = GV.getContext(); - addToContextOwner(VariableDIE, GVContext); + TheCU->addToContextOwner(VariableDIE, GVContext); // Add location. if (isGlobalVariable) { DIEBlock *Block = new (DIEValueAllocator) DIEBlock(); - addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_addr); - addLabel(Block, 0, dwarf::DW_FORM_udata, + TheCU->addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_addr); + TheCU->addLabel(Block, 0, dwarf::DW_FORM_udata, Asm->Mang->getSymbol(GV.getGlobal())); // Do not create specification DIE if context is either compile unit // or a subprogram. @@ -2086,28 +1009,28 @@ void DwarfDebug::constructGlobalVariableDIE(const MDNode *N) { !GVContext.isFile() && !isSubprogramContext(GVContext)) { // Create specification DIE. DIE *VariableSpecDIE = new DIE(dwarf::DW_TAG_variable); - addDIEEntry(VariableSpecDIE, dwarf::DW_AT_specification, + TheCU->addDIEEntry(VariableSpecDIE, dwarf::DW_AT_specification, dwarf::DW_FORM_ref4, VariableDIE); - addBlock(VariableSpecDIE, dwarf::DW_AT_location, 0, Block); - addUInt(VariableDIE, dwarf::DW_AT_declaration, dwarf::DW_FORM_flag, 1); + TheCU->addBlock(VariableSpecDIE, dwarf::DW_AT_location, 0, Block); + TheCU->addUInt(VariableDIE, dwarf::DW_AT_declaration, dwarf::DW_FORM_flag, 1); TheCU->addDie(VariableSpecDIE); } else { - addBlock(VariableDIE, dwarf::DW_AT_location, 0, Block); + TheCU->addBlock(VariableDIE, dwarf::DW_AT_location, 0, Block); } } else if (ConstantInt *CI = dyn_cast_or_null<ConstantInt>(GV.getConstant())) - addConstantValue(VariableDIE, CI, isUnsignedDIType(GTy)); + TheCU->addConstantValue(VariableDIE, CI, isUnsignedDIType(GTy)); else if (const ConstantExpr *CE = getMergedGlobalExpr(N->getOperand(11))) { // GV is a merged global. DIEBlock *Block = new (DIEValueAllocator) DIEBlock(); - addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_addr); - addLabel(Block, 0, dwarf::DW_FORM_udata, - Asm->Mang->getSymbol(cast<GlobalValue>(CE->getOperand(0)))); + TheCU->addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_addr); + TheCU->addLabel(Block, 0, dwarf::DW_FORM_udata, + Asm->Mang->getSymbol(cast<GlobalValue>(CE->getOperand(0)))); ConstantInt *CII = cast<ConstantInt>(CE->getOperand(2)); - addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_constu); - addUInt(Block, 0, dwarf::DW_FORM_udata, CII->getZExtValue()); - addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_plus); - addBlock(VariableDIE, dwarf::DW_AT_location, 0, Block); + TheCU->addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_constu); + TheCU->addUInt(Block, 0, dwarf::DW_FORM_udata, CII->getZExtValue()); + TheCU->addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_plus); + TheCU->addBlock(VariableDIE, dwarf::DW_AT_location, 0, Block); } return; @@ -2133,7 +1056,7 @@ void DwarfDebug::constructSubprogramDIE(const MDNode *N) { TheCU->insertDIE(N, SubprogramDie); // Add to context owner. - addToContextOwner(SubprogramDie, SP.getContext()); + TheCU->addToContextOwner(SubprogramDie, SP.getContext()); // Expose as global. TheCU->addGlobal(SP.getName(), SubprogramDie); @@ -2148,52 +1071,80 @@ void DwarfDebug::beginModule(Module *M) { if (DisableDebugInfoPrinting) return; - DebugInfoFinder DbgFinder; - DbgFinder.processModule(*M); - - bool HasDebugInfo = false; + // If module has named metadata anchors then use them, otherwise scan the module + // using debug info finder to collect debug info. + NamedMDNode *CU_Nodes = M->getNamedMetadata("llvm.dbg.cu"); + if (CU_Nodes) { + + NamedMDNode *GV_Nodes = M->getNamedMetadata("llvm.dbg.gv"); + NamedMDNode *SP_Nodes = M->getNamedMetadata("llvm.dbg.sp"); + if (!GV_Nodes && !SP_Nodes) + // If there are not any global variables or any functions then + // there is not any debug info in this module. + return; + + for (unsigned i = 0, e = CU_Nodes->getNumOperands(); i != e; ++i) + constructCompileUnit(CU_Nodes->getOperand(i)); + + if (GV_Nodes) + for (unsigned i = 0, e = GV_Nodes->getNumOperands(); i != e; ++i) + constructGlobalVariableDIE(GV_Nodes->getOperand(i)); + + if (SP_Nodes) + for (unsigned i = 0, e = SP_Nodes->getNumOperands(); i != e; ++i) + constructSubprogramDIE(SP_Nodes->getOperand(i)); + + } else { - // Scan all the compile-units to see if there are any marked as the main unit. - // if not, we do not generate debug info. - for (DebugInfoFinder::iterator I = DbgFinder.compile_unit_begin(), - E = DbgFinder.compile_unit_end(); I != E; ++I) { - if (DICompileUnit(*I).isMain()) { - HasDebugInfo = true; - break; + DebugInfoFinder DbgFinder; + DbgFinder.processModule(*M); + + bool HasDebugInfo = false; + // Scan all the compile-units to see if there are any marked as the main unit. + // if not, we do not generate debug info. + for (DebugInfoFinder::iterator I = DbgFinder.compile_unit_begin(), + E = DbgFinder.compile_unit_end(); I != E; ++I) { + if (DICompileUnit(*I).isMain()) { + HasDebugInfo = true; + break; + } } + if (!HasDebugInfo) return; + + // Create all the compile unit DIEs. + for (DebugInfoFinder::iterator I = DbgFinder.compile_unit_begin(), + E = DbgFinder.compile_unit_end(); I != E; ++I) + constructCompileUnit(*I); + + // Create DIEs for each global variable. + for (DebugInfoFinder::iterator I = DbgFinder.global_variable_begin(), + E = DbgFinder.global_variable_end(); I != E; ++I) + constructGlobalVariableDIE(*I); + + // Create DIEs for each subprogram. + for (DebugInfoFinder::iterator I = DbgFinder.subprogram_begin(), + E = DbgFinder.subprogram_end(); I != E; ++I) + constructSubprogramDIE(*I); } - - if (!HasDebugInfo) return; - + // Tell MMI that we have debug info. MMI->setDebugInfoAvailability(true); - + // Emit initial sections. EmitSectionLabels(); - // Create all the compile unit DIEs. - for (DebugInfoFinder::iterator I = DbgFinder.compile_unit_begin(), - E = DbgFinder.compile_unit_end(); I != E; ++I) - constructCompileUnit(*I); - - // Create DIEs for each subprogram. - for (DebugInfoFinder::iterator I = DbgFinder.subprogram_begin(), - E = DbgFinder.subprogram_end(); I != E; ++I) - constructSubprogramDIE(*I); - - // Create DIEs for each global variable. - for (DebugInfoFinder::iterator I = DbgFinder.global_variable_begin(), - E = DbgFinder.global_variable_end(); I != E; ++I) - constructGlobalVariableDIE(*I); - //getOrCreateTypeDIE if (NamedMDNode *NMD = M->getNamedMetadata("llvm.dbg.enum")) - for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i) - getOrCreateTypeDIE(DIType(NMD->getOperand(i))); + for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i) { + DIType Ty(NMD->getOperand(i)); + getCompileUnit(Ty)->getOrCreateTypeDIE(Ty); + } if (NamedMDNode *NMD = M->getNamedMetadata("llvm.dbg.ty")) - for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i) - getOrCreateTypeDIE(DIType(NMD->getOperand(i))); + for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i) { + DIType Ty(NMD->getOperand(i)); + getCompileUnit(Ty)->getOrCreateTypeDIE(Ty); + } // Prime section data. SectionMap.insert(Asm->getObjFileLowering().getTextSection()); @@ -2244,7 +1195,7 @@ void DwarfDebug::endModule() { for (SmallPtrSet<DIE *, 4>::iterator AI = InlinedSubprogramDIEs.begin(), AE = InlinedSubprogramDIEs.end(); AI != AE; ++AI) { DIE *ISP = *AI; - addUInt(ISP, dwarf::DW_AT_inline, 0, dwarf::DW_INL_inlined); + FirstCU->addUInt(ISP, dwarf::DW_AT_inline, 0, dwarf::DW_INL_inlined); } for (DenseMap<DIE *, const MDNode *>::iterator CI = ContainingTypeMap.begin(), @@ -2254,7 +1205,8 @@ void DwarfDebug::endModule() { if (!N) continue; DIE *NDie = getCompileUnit(N)->getDIE(N); if (!NDie) continue; - addDIEEntry(SPDie, dwarf::DW_AT_containing_type, dwarf::DW_FORM_ref4, NDie); + getCompileUnit(N)->addDIEEntry(SPDie, dwarf::DW_AT_containing_type, + dwarf::DW_FORM_ref4, NDie); } // Standard sections final addresses. @@ -2269,14 +1221,6 @@ void DwarfDebug::endModule() { Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("section_end", i)); } - // Emit common frame information. - emitCommonDebugFrame(); - - // Emit function debug frame information - for (std::vector<FunctionDebugFrameInfo>::iterator I = DebugFrames.begin(), - E = DebugFrames.end(); I != E; ++I) - emitFunctionDebugFrame(*I); - // Compute DIE offsets and sizes. computeSizeAndOffsets(); @@ -2464,15 +1408,10 @@ DwarfDebug::collectVariableInfo(const MachineFunction *MF, HI = History.begin(), HE = History.end(); HI != HE; ++HI) { const MachineInstr *Begin = *HI; assert(Begin->isDebugValue() && "Invalid History entry"); - MachineLocation MLoc; - if (Begin->getNumOperands() == 3) { - if (Begin->getOperand(0).isReg() && Begin->getOperand(1).isImm()) - MLoc.set(Begin->getOperand(0).getReg(), Begin->getOperand(1).getImm()); - } else - MLoc = Asm->getDebugValueLocation(Begin); - // FIXME: emitDebugLoc only understands registers. - if (!MLoc.getReg()) + // Check if DBG_VALUE is truncating a range. + if (Begin->getNumOperands() > 1 && Begin->getOperand(0).isReg() + && !Begin->getOperand(0).getReg()) continue; // Compute the range for a register location. @@ -2481,7 +1420,7 @@ DwarfDebug::collectVariableInfo(const MachineFunction *MF, if (HI + 1 == HE) // If Begin is the last instruction in History then its value is valid - // until the end of the funtion. + // until the end of the function. SLabel = FunctionEndSym; else { const MachineInstr *End = HI[1]; @@ -2496,7 +1435,25 @@ DwarfDebug::collectVariableInfo(const MachineFunction *MF, } // The value is valid until the next DBG_VALUE or clobber. - DotDebugLocEntries.push_back(DotDebugLocEntry(FLabel, SLabel, MLoc)); + MachineLocation MLoc; + if (Begin->getNumOperands() == 3) { + if (Begin->getOperand(0).isReg() && Begin->getOperand(1).isImm()) { + MLoc.set(Begin->getOperand(0).getReg(), + Begin->getOperand(1).getImm()); + DotDebugLocEntries. + push_back(DotDebugLocEntry(FLabel, SLabel, MLoc, Var)); + } + // FIXME: Handle isFPImm also. + else if (Begin->getOperand(0).isImm()) { + DotDebugLocEntries. + push_back(DotDebugLocEntry(FLabel, SLabel, + Begin->getOperand(0).getImm())); + } + } else { + MLoc = Asm->getDebugValueLocation(Begin); + DotDebugLocEntries. + push_back(DotDebugLocEntry(FLabel, SLabel, MLoc, Var)); + } } DotDebugLocEntries.push_back(DotDebugLocEntry()); } @@ -2533,12 +1490,17 @@ void DwarfDebug::beginInstruction(const MachineInstr *MI) { if (!MI->isDebugValue()) { DebugLoc DL = MI->getDebugLoc(); if (DL != PrevInstLoc && (!DL.isUnknown() || UnknownLocations)) { + unsigned Flags = DWARF2_FLAG_IS_STMT; PrevInstLoc = DL; + if (DL == PrologEndLoc) { + Flags |= DWARF2_FLAG_PROLOGUE_END; + PrologEndLoc = DebugLoc(); + } if (!DL.isUnknown()) { const MDNode *Scope = DL.getScope(Asm->MF->getFunction()->getContext()); - recordSourceLine(DL.getLine(), DL.getCol(), Scope); + recordSourceLine(DL.getLine(), DL.getCol(), Scope, Flags); } else - recordSourceLine(0, 0, 0); + recordSourceLine(0, 0, 0, 0); } } @@ -2850,41 +1812,22 @@ void DwarfDebug::identifyScopeMarkers() { } } -/// FindFirstDebugLoc - Find the first debug location in the function. This -/// is intended to be an approximation for the source position of the -/// beginning of the function. -static DebugLoc FindFirstDebugLoc(const MachineFunction *MF) { - for (MachineFunction::const_iterator I = MF->begin(), E = MF->end(); - I != E; ++I) - for (MachineBasicBlock::const_iterator MBBI = I->begin(), MBBE = I->end(); - MBBI != MBBE; ++MBBI) { - DebugLoc DL = MBBI->getDebugLoc(); - if (!DL.isUnknown()) - return DL; - } - return DebugLoc(); +/// getScopeNode - Get MDNode for DebugLoc's scope. +static MDNode *getScopeNode(DebugLoc DL, const LLVMContext &Ctx) { + if (MDNode *InlinedAt = DL.getInlinedAt(Ctx)) + return getScopeNode(DebugLoc::getFromDILocation(InlinedAt), Ctx); + return DL.getScope(Ctx); } -#ifndef NDEBUG -/// CheckLineNumbers - Count basicblocks whose instructions do not have any -/// line number information. -static void CheckLineNumbers(const MachineFunction *MF) { - for (MachineFunction::const_iterator I = MF->begin(), E = MF->end(); - I != E; ++I) { - bool FoundLineNo = false; - for (MachineBasicBlock::const_iterator II = I->begin(), IE = I->end(); - II != IE; ++II) { - const MachineInstr *MI = II; - if (!MI->getDebugLoc().isUnknown()) { - FoundLineNo = true; - break; - } - } - if (!FoundLineNo && I->size()) - ++BlocksWithoutLineNo; - } +/// getFnDebugLoc - Walk up the scope chain of given debug loc and find +/// line number info for the function. +static DebugLoc getFnDebugLoc(DebugLoc DL, const LLVMContext &Ctx) { + const MDNode *Scope = getScopeNode(DL, Ctx); + DISubprogram SP = getDISubprogram(Scope); + if (SP.Verify()) + return DebugLoc::get(SP.getLineNumber(), 0, SP); + return DebugLoc(); } -#endif /// beginFunction - Gather pre-function debug information. Assumes being /// emitted immediately after the function entry point. @@ -2892,44 +1835,16 @@ void DwarfDebug::beginFunction(const MachineFunction *MF) { if (!MMI->hasDebugInfo()) return; if (!extractScopeInformation()) return; -#ifndef NDEBUG - CheckLineNumbers(MF); -#endif - FunctionBeginSym = Asm->GetTempSymbol("func_begin", Asm->getFunctionNumber()); // Assumes in correct section after the entry point. Asm->OutStreamer.EmitLabel(FunctionBeginSym); - // Emit label for the implicitly defined dbg.stoppoint at the start of the - // function. - DebugLoc FDL = FindFirstDebugLoc(MF); - if (FDL.isUnknown()) return; - - const MDNode *Scope = FDL.getScope(MF->getFunction()->getContext()); - const MDNode *TheScope = 0; - - DISubprogram SP = getDISubprogram(Scope); - unsigned Line, Col; - if (SP.Verify()) { - Line = SP.getLineNumber(); - Col = 0; - TheScope = SP; - } else { - Line = FDL.getLine(); - Col = FDL.getCol(); - TheScope = Scope; - } - - recordSourceLine(Line, Col, TheScope); - assert(UserVariables.empty() && DbgValues.empty() && "Maps weren't cleaned"); /// ProcessedArgs - Collection of arguments already processed. SmallPtrSet<const MDNode *, 8> ProcessedArgs; - const TargetRegisterInfo *TRI = Asm->TM.getRegisterInfo(); - /// LiveUserVar - Map physreg numbers to the MDNode they contain. std::vector<const MDNode*> LiveUserVar(TRI->getNumRegs()); @@ -2995,6 +1910,11 @@ void DwarfDebug::beginFunction(const MachineFunction *MF) { if (!MI->isLabel()) AtBlockEntry = false; + // First known non DBG_VALUE location marks beginning of function + // body. + if (PrologEndLoc.isUnknown() && !MI->getDebugLoc().isUnknown()) + PrologEndLoc = MI->getDebugLoc(); + // 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) { @@ -3063,6 +1983,15 @@ void DwarfDebug::beginFunction(const MachineFunction *MF) { PrevInstLoc = DebugLoc(); PrevLabel = FunctionBeginSym; + + // Record beginning of function. + if (!PrologEndLoc.isUnknown()) { + DebugLoc FnStartDL = getFnDebugLoc(PrologEndLoc, + MF->getFunction()->getContext()); + recordSourceLine(FnStartDL.getLine(), FnStartDL.getCol(), + FnStartDL.getScope(MF->getFunction()->getContext()), + DWARF2_FLAG_IS_STMT); + } } /// endFunction - Gather and emit post-function debug information. @@ -3109,8 +2038,9 @@ void DwarfDebug::endFunction(const MachineFunction *MF) { DIE *CurFnDIE = constructScopeDIE(CurrentFnDbgScope); if (!DisableFramePointerElim(*MF)) - addUInt(CurFnDIE, dwarf::DW_AT_APPLE_omit_frame_ptr, - dwarf::DW_FORM_flag, 1); + getCompileUnit(CurrentFnDbgScope->getScopeNode())->addUInt(CurFnDIE, + dwarf::DW_AT_APPLE_omit_frame_ptr, + dwarf::DW_FORM_flag, 1); DebugFrames.push_back(FunctionDebugFrameInfo(Asm->getFunctionNumber(), @@ -3119,7 +2049,7 @@ void DwarfDebug::endFunction(const MachineFunction *MF) { // Clear debug info CurrentFnDbgScope = NULL; - CurrentFnArguments.clear(); + DeleteContainerPointers(CurrentFnArguments); DbgVariableToFrameIndexMap.clear(); VarToAbstractVarMap.clear(); DbgVariableToDbgInstMap.clear(); @@ -3176,7 +2106,8 @@ DbgScope *DwarfDebug::findDbgScope(const MachineInstr *MInsn) { /// recordSourceLine - Register a source line with debug info. Returns the /// unique label that was emitted and which provides correspondence to /// the source line list. -void DwarfDebug::recordSourceLine(unsigned Line, unsigned Col, const MDNode *S){ +void DwarfDebug::recordSourceLine(unsigned Line, unsigned Col, const MDNode *S, + unsigned Flags) { StringRef Fn; StringRef Dir; unsigned Src = 1; @@ -3204,9 +2135,8 @@ void DwarfDebug::recordSourceLine(unsigned Line, unsigned Col, const MDNode *S){ Src = GetOrCreateSourceID(Fn, Dir); } - - Asm->OutStreamer.EmitDwarfLocDirective(Src, Line, Col, DWARF2_FLAG_IS_STMT, - 0, 0); + Asm->OutStreamer.EmitDwarfLocDirective(Src, Line, Col, Flags, + 0, 0, Fn); } //===----------------------------------------------------------------------===// @@ -3264,17 +2194,15 @@ DwarfDebug::computeSizeAndOffset(DIE *Die, unsigned Offset, bool Last) { /// computeSizeAndOffsets - Compute the size and offset of all the DIEs. /// void DwarfDebug::computeSizeAndOffsets() { - unsigned PrevOffset = 0; for (DenseMap<const MDNode *, CompileUnit *>::iterator I = CUMap.begin(), E = CUMap.end(); I != E; ++I) { // Compute size of compile unit header. - static unsigned Offset = PrevOffset + + 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->second->getCUDie(), Offset, true); - PrevOffset = Offset; } } @@ -3296,11 +2224,6 @@ void DwarfDebug::EmitSectionLabels() { const TargetLoweringObjectFile &TLOF = Asm->getObjFileLowering(); // Dwarf sections base addresses. - if (Asm->MAI->doesDwarfRequireFrameSection()) { - DwarfFrameSectionSym = - EmitSectionSym(Asm, TLOF.getDwarfFrameSection(), "section_debug_frame"); - } - DwarfInfoSectionSym = EmitSectionSym(Asm, TLOF.getDwarfInfoSection(), "section_info"); DwarfAbbrevSectionSym = @@ -3435,8 +2358,7 @@ void DwarfDebug::emitDebugInfo() { unsigned ContentSize = Die->getSize() + sizeof(int16_t) + // DWARF version number sizeof(int32_t) + // Offset Into Abbrev. Section - sizeof(int8_t) + // Pointer Size (in bytes) - sizeof(int32_t); // FIXME - extra pad for gdb bug. + sizeof(int8_t); // Pointer Size (in bytes) Asm->OutStreamer.AddComment("Length of Compilation Unit Info"); Asm->EmitInt32(ContentSize); @@ -3449,12 +2371,6 @@ void DwarfDebug::emitDebugInfo() { Asm->EmitInt8(Asm->getTargetData().getPointerSize()); emitDIE(Die); - // FIXME - extra padding for gdb bug. - Asm->OutStreamer.AddComment("4 extra padding bytes for GDB"); - Asm->EmitInt8(0); - Asm->EmitInt8(0); - Asm->EmitInt8(0); - Asm->EmitInt8(0); Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("info_end", TheCU->getID())); } } @@ -3515,91 +2431,6 @@ void DwarfDebug::emitEndOfLineMatrix(unsigned SectionEnd) { Asm->EmitInt8(1); } -/// emitCommonDebugFrame - Emit common frame info into a debug frame section. -/// -void DwarfDebug::emitCommonDebugFrame() { - if (!Asm->MAI->doesDwarfRequireFrameSection()) - return; - - int stackGrowth = Asm->getTargetData().getPointerSize(); - if (Asm->TM.getFrameLowering()->getStackGrowthDirection() == - TargetFrameLowering::StackGrowsDown) - stackGrowth *= -1; - - // Start the dwarf frame section. - Asm->OutStreamer.SwitchSection( - Asm->getObjFileLowering().getDwarfFrameSection()); - - Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("debug_frame_common")); - Asm->OutStreamer.AddComment("Length of Common Information Entry"); - Asm->EmitLabelDifference(Asm->GetTempSymbol("debug_frame_common_end"), - Asm->GetTempSymbol("debug_frame_common_begin"), 4); - - Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("debug_frame_common_begin")); - Asm->OutStreamer.AddComment("CIE Identifier Tag"); - Asm->EmitInt32((int)dwarf::DW_CIE_ID); - Asm->OutStreamer.AddComment("CIE Version"); - Asm->EmitInt8(dwarf::DW_CIE_VERSION); - Asm->OutStreamer.AddComment("CIE Augmentation"); - Asm->OutStreamer.EmitIntValue(0, 1, /*addrspace*/0); // nul terminator. - Asm->EmitULEB128(1, "CIE Code Alignment Factor"); - Asm->EmitSLEB128(stackGrowth, "CIE Data Alignment Factor"); - Asm->OutStreamer.AddComment("CIE RA Column"); - const TargetRegisterInfo *RI = Asm->TM.getRegisterInfo(); - const TargetFrameLowering *TFI = Asm->TM.getFrameLowering(); - Asm->EmitInt8(RI->getDwarfRegNum(RI->getRARegister(), false)); - - std::vector<MachineMove> Moves; - TFI->getInitialFrameState(Moves); - - Asm->EmitFrameMoves(Moves, 0, false); - - Asm->EmitAlignment(2); - Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("debug_frame_common_end")); -} - -/// emitFunctionDebugFrame - Emit per function frame info into a debug frame -/// section. -void DwarfDebug:: -emitFunctionDebugFrame(const FunctionDebugFrameInfo &DebugFrameInfo) { - if (!Asm->MAI->doesDwarfRequireFrameSection()) - return; - - // Start the dwarf frame section. - Asm->OutStreamer.SwitchSection( - Asm->getObjFileLowering().getDwarfFrameSection()); - - Asm->OutStreamer.AddComment("Length of Frame Information Entry"); - MCSymbol *DebugFrameBegin = - Asm->GetTempSymbol("debug_frame_begin", DebugFrameInfo.Number); - MCSymbol *DebugFrameEnd = - Asm->GetTempSymbol("debug_frame_end", DebugFrameInfo.Number); - Asm->EmitLabelDifference(DebugFrameEnd, DebugFrameBegin, 4); - - Asm->OutStreamer.EmitLabel(DebugFrameBegin); - - Asm->OutStreamer.AddComment("FDE CIE offset"); - Asm->EmitSectionOffset(Asm->GetTempSymbol("debug_frame_common"), - DwarfFrameSectionSym); - - Asm->OutStreamer.AddComment("FDE initial location"); - MCSymbol *FuncBeginSym = - Asm->GetTempSymbol("func_begin", DebugFrameInfo.Number); - Asm->OutStreamer.EmitSymbolValue(FuncBeginSym, - Asm->getTargetData().getPointerSize(), - 0/*AddrSpace*/); - - - Asm->OutStreamer.AddComment("FDE address range"); - Asm->EmitLabelDifference(Asm->GetTempSymbol("func_end",DebugFrameInfo.Number), - FuncBeginSym, Asm->getTargetData().getPointerSize()); - - Asm->EmitFrameMoves(DebugFrameInfo.Moves, FuncBeginSym, false); - - Asm->EmitAlignment(2); - Asm->OutStreamer.EmitLabel(DebugFrameEnd); -} - /// emitDebugPubNames - Emit visible names into a debug pubnames section. /// void DwarfDebug::emitDebugPubNames() { @@ -3760,33 +2591,63 @@ void DwarfDebug::emitDebugLoc() { } else { Asm->OutStreamer.EmitSymbolValue(Entry.Begin, Size, 0); Asm->OutStreamer.EmitSymbolValue(Entry.End, Size, 0); - const TargetRegisterInfo *RI = Asm->TM.getRegisterInfo(); - unsigned Reg = RI->getDwarfRegNum(Entry.Loc.getReg(), false); - if (int Offset = Entry.Loc.getOffset()) { - // If the value is at a certain offset from frame register then - // use DW_OP_fbreg. - unsigned OffsetSize = Offset ? MCAsmInfo::getSLEB128Size(Offset) : 1; - Asm->OutStreamer.AddComment("Loc expr size"); - Asm->EmitInt16(1 + OffsetSize); - Asm->OutStreamer.AddComment( - dwarf::OperationEncodingString(dwarf::DW_OP_fbreg)); - Asm->EmitInt8(dwarf::DW_OP_fbreg); - Asm->OutStreamer.AddComment("Offset"); - Asm->EmitSLEB128(Offset); - } else { - if (Reg < 32) { - Asm->OutStreamer.AddComment("Loc expr size"); - Asm->EmitInt16(1); - Asm->OutStreamer.AddComment( - dwarf::OperationEncodingString(dwarf::DW_OP_reg0 + Reg)); - Asm->EmitInt8(dwarf::DW_OP_reg0 + Reg); + DIVariable DV(Entry.Variable); + Asm->OutStreamer.AddComment("Loc expr size"); + MCSymbol *begin = Asm->OutStreamer.getContext().CreateTempSymbol(); + MCSymbol *end = Asm->OutStreamer.getContext().CreateTempSymbol(); + Asm->EmitLabelDifference(end, begin, 2); + Asm->OutStreamer.EmitLabel(begin); + if (Entry.isConstant()) { + DIBasicType BTy(DV.getType()); + if (BTy.Verify() && + (BTy.getEncoding() == dwarf::DW_ATE_signed + || BTy.getEncoding() == dwarf::DW_ATE_signed_char)) { + Asm->OutStreamer.AddComment("DW_OP_consts"); + Asm->EmitInt8(dwarf::DW_OP_consts); + Asm->EmitSLEB128(Entry.getConstant()); } else { - Asm->OutStreamer.AddComment("Loc expr size"); - Asm->EmitInt16(1 + MCAsmInfo::getULEB128Size(Reg)); - Asm->EmitInt8(dwarf::DW_OP_regx); - Asm->EmitULEB128(Reg); + Asm->OutStreamer.AddComment("DW_OP_constu"); + Asm->EmitInt8(dwarf::DW_OP_constu); + Asm->EmitULEB128(Entry.getConstant()); } + } else if (DV.hasComplexAddress()) { + unsigned N = DV.getNumAddrElements(); + unsigned i = 0; + if (N >= 2 && DV.getAddrElement(0) == DIBuilder::OpPlus) { + if (Entry.Loc.getOffset()) { + i = 2; + Asm->EmitDwarfRegOp(Entry.Loc); + Asm->OutStreamer.AddComment("DW_OP_deref"); + Asm->EmitInt8(dwarf::DW_OP_deref); + Asm->OutStreamer.AddComment("DW_OP_plus_uconst"); + Asm->EmitInt8(dwarf::DW_OP_plus_uconst); + Asm->EmitSLEB128(DV.getAddrElement(1)); + } else { + // If first address element is OpPlus then emit + // DW_OP_breg + Offset instead of DW_OP_reg + Offset. + MachineLocation Loc(Entry.Loc.getReg(), DV.getAddrElement(1)); + Asm->EmitDwarfRegOp(Loc); + i = 2; + } + } else { + Asm->EmitDwarfRegOp(Entry.Loc); + } + + // Emit remaining complex address elements. + for (; i < N; ++i) { + uint64_t Element = DV.getAddrElement(i); + if (Element == DIBuilder::OpPlus) { + Asm->EmitInt8(dwarf::DW_OP_plus_uconst); + Asm->EmitULEB128(DV.getAddrElement(++i)); + } else if (Element == DIBuilder::OpDeref) + Asm->EmitInt8(dwarf::DW_OP_deref); + else llvm_unreachable("unknown Opcode found in complex address"); + } + } else { + // Regular entry. + Asm->EmitDwarfRegOp(Entry.Loc); } + Asm->OutStreamer.EmitLabel(end); } } } diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.h b/lib/CodeGen/AsmPrinter/DwarfDebug.h index 4aeefde..abda2e6 100644 --- a/lib/CodeGen/AsmPrinter/DwarfDebug.h +++ b/lib/CodeGen/AsmPrinter/DwarfDebug.h @@ -16,6 +16,7 @@ #include "llvm/CodeGen/AsmPrinter.h" #include "llvm/CodeGen/MachineLocation.h" +#include "llvm/Analysis/DebugInfo.h" #include "DIE.h" #include "llvm/ADT/DenseMap.h" #include "llvm/ADT/FoldingSet.h" @@ -39,21 +40,6 @@ class DIEAbbrev; class DIE; class DIEBlock; class DIEEntry; -class DIArray; -class DIEnumerator; -class DIDescriptor; -class DIVariable; -class DIGlobal; -class DIGlobalVariable; -class DISubprogram; -class DIBasicType; -class DIDerivedType; -class DIType; -class DINameSpace; -class DISubrange; -class DICompositeType; -class DITemplateTypeParameter; -class DITemplateValueParameter; //===----------------------------------------------------------------------===// /// SrcLineInfo - This class is used to record source line correspondence. @@ -80,10 +66,21 @@ typedef struct DotDebugLocEntry { const MCSymbol *Begin; const MCSymbol *End; MachineLocation Loc; + const MDNode *Variable; bool Merged; - DotDebugLocEntry() : Begin(0), End(0), Merged(false) {} - DotDebugLocEntry(const MCSymbol *B, const MCSymbol *E, MachineLocation &L) - : Begin(B), End(E), Loc(L), Merged(false) {} + bool Constant; + int64_t iConstant; + DotDebugLocEntry() + : Begin(0), End(0), Variable(0), Merged(false), + Constant(false), iConstant(0) {} + DotDebugLocEntry(const MCSymbol *B, const MCSymbol *E, MachineLocation &L, + const MDNode *V) + : Begin(B), End(E), Loc(L), Variable(V), Merged(false), + Constant(false), iConstant(0) {} + DotDebugLocEntry(const MCSymbol *B, const MCSymbol *E, int64_t i) + : Begin(B), End(E), Variable(0), Merged(false), + Constant(true), iConstant(i) {} + /// Empty entries are also used as a trigger to emit temp label. Such /// labels are referenced is used to find debug_loc offset for a given DIE. bool isEmpty() { return Begin == 0 && End == 0; } @@ -94,8 +91,47 @@ typedef struct DotDebugLocEntry { Next->Begin = Begin; Merged = true; } + bool isConstant() { return Constant; } + int64_t getConstant() { return iConstant; } } DotDebugLocEntry; +//===----------------------------------------------------------------------===// +/// DbgVariable - This class is used to track local variable information. +/// +class DbgVariable { + DIVariable Var; // Variable Descriptor. + DIE *TheDIE; // Variable DIE. + unsigned DotDebugLocOffset; // Offset in DotDebugLocEntries. +public: + // AbsVar may be NULL. + DbgVariable(DIVariable V) : Var(V), TheDIE(0), DotDebugLocOffset(~0U) {} + + // Accessors. + DIVariable getVariable() const { return Var; } + void setDIE(DIE *D) { TheDIE = D; } + DIE *getDIE() const { return TheDIE; } + void setDotDebugLocOffset(unsigned O) { DotDebugLocOffset = O; } + unsigned getDotDebugLocOffset() const { return DotDebugLocOffset; } + StringRef getName() const { return Var.getName(); } + unsigned getTag() const { return Var.getTag(); } + bool variableHasComplexAddress() const { + assert(Var.Verify() && "Invalid complex DbgVariable!"); + return Var.hasComplexAddress(); + } + bool isBlockByrefVariable() const { + assert(Var.Verify() && "Invalid complex DbgVariable!"); + return Var.isBlockByrefVariable(); + } + unsigned getNumAddrElements() const { + assert(Var.Verify() && "Invalid complex DbgVariable!"); + return Var.getNumAddrElements(); + } + uint64_t getAddrElement(unsigned i) const { + return Var.getAddrElement(i); + } + DIType getType() const; +}; + class DwarfDebug { /// Asm - Target of Dwarf emission. AsmPrinter *Asm; @@ -122,12 +158,6 @@ class DwarfDebug { /// id mapped to a unique id. StringMap<unsigned> SourceIdMap; - /// DIEBlocks - A list of all the DIEBlocks in use. - std::vector<DIEBlock *> DIEBlocks; - - // DIEValueAllocator - All DIEValues are allocated through this allocator. - BumpPtrAllocator DIEValueAllocator; - /// StringPool - A String->Symbol mapping of strings used by indirect /// references. StringMap<std::pair<MCSymbol*, unsigned> > StringPool; @@ -198,8 +228,6 @@ class DwarfDebug { /// corresponds to the MDNode mapped with the subprogram DIE. DenseMap<DIE *, const MDNode *> ContainingTypeMap; - typedef SmallVector<DbgScope *, 2> ScopeVector; - /// InlineInfo - Keep track of inlined functions and their location. This /// information is used to populate debug_inlined section. typedef std::pair<const MCSymbol *, DIE *> InlineInfoLabels; @@ -236,6 +264,10 @@ class DwarfDebug { DebugLoc PrevInstLoc; MCSymbol *PrevLabel; + /// PrologEndLoc - This location indicates end of function prologue and + /// beginning of function body. + DebugLoc PrologEndLoc; + struct FunctionDebugFrameInfo { unsigned Number; std::vector<MachineMove> Moves; @@ -246,157 +278,23 @@ class DwarfDebug { std::vector<FunctionDebugFrameInfo> DebugFrames; + // DIEValueAllocator - All DIEValues are allocated through this allocator. + BumpPtrAllocator DIEValueAllocator; + // Section Symbols: these are assembler temporary labels that are emitted at // the beginning of each supported dwarf section. These are used to form // section offsets and are created by EmitSectionLabels. - MCSymbol *DwarfFrameSectionSym, *DwarfInfoSectionSym, *DwarfAbbrevSectionSym; + MCSymbol *DwarfInfoSectionSym, *DwarfAbbrevSectionSym; MCSymbol *DwarfStrSectionSym, *TextSectionSym, *DwarfDebugRangeSectionSym; MCSymbol *DwarfDebugLocSectionSym; MCSymbol *FunctionBeginSym, *FunctionEndSym; - DIEInteger *DIEIntegerOne; - private: /// assignAbbrevNumber - Define a unique number for the abbreviation. /// void assignAbbrevNumber(DIEAbbrev &Abbrev); - /// createDIEEntry - Creates a new DIEEntry to be a proxy for a debug - /// information entry. - DIEEntry *createDIEEntry(DIE *Entry); - - /// addUInt - Add an unsigned integer attribute data and value. - /// - void addUInt(DIE *Die, unsigned Attribute, unsigned Form, uint64_t Integer); - - /// addSInt - Add an signed integer attribute data and value. - /// - void addSInt(DIE *Die, unsigned Attribute, unsigned Form, int64_t Integer); - - /// addString - Add a string attribute data and value. - /// - void addString(DIE *Die, unsigned Attribute, unsigned Form, - const StringRef Str); - - /// addLabel - Add a Dwarf label attribute data and value. - /// - void addLabel(DIE *Die, unsigned Attribute, unsigned Form, - const MCSymbol *Label); - - /// addDelta - Add a label delta attribute data and value. - /// - void addDelta(DIE *Die, unsigned Attribute, unsigned Form, - const MCSymbol *Hi, const MCSymbol *Lo); - - /// addDIEEntry - Add a DIE attribute data and value. - /// - void addDIEEntry(DIE *Die, unsigned Attribute, unsigned Form, DIE *Entry); - - /// addBlock - Add block data. - /// - void addBlock(DIE *Die, unsigned Attribute, unsigned Form, DIEBlock *Block); - - /// addSourceLine - Add location information to specified debug information - /// entry. - void addSourceLine(DIE *Die, DIVariable V); - void addSourceLine(DIE *Die, DIGlobalVariable G); - void addSourceLine(DIE *Die, DISubprogram SP); - void addSourceLine(DIE *Die, DIType Ty); - void addSourceLine(DIE *Die, DINameSpace NS); - - /// addAddress - Add an address attribute to a die based on the location - /// provided. - void addAddress(DIE *Die, unsigned Attribute, - const MachineLocation &Location); - - /// addRegisterAddress - Add register location entry in variable DIE. - bool addRegisterAddress(DIE *Die, const MachineOperand &MO); - - /// addConstantValue - Add constant value entry in variable DIE. - bool addConstantValue(DIE *Die, const MachineOperand &MO); - bool addConstantValue(DIE *Die, ConstantInt *CI, bool Unsigned); - - /// addConstantFPValue - Add constant value entry in variable DIE. - bool addConstantFPValue(DIE *Die, const MachineOperand &MO); - - /// addTemplateParams - Add template parameters in buffer. - void addTemplateParams(DIE &Buffer, DIArray TParams); - - /// addComplexAddress - Start with the address based on the location provided, - /// and generate the DWARF information necessary to find the actual variable - /// (navigating the extra location information encoded in the type) based on - /// the starting location. Add the DWARF information to the die. - /// - void addComplexAddress(DbgVariable *&DV, DIE *Die, unsigned Attribute, - const MachineLocation &Location); - - // FIXME: Should be reformulated in terms of addComplexAddress. - /// addBlockByrefAddress - Start with the address based on the location - /// provided, and generate the DWARF information necessary to find the - /// actual Block variable (navigating the Block struct) based on the - /// starting location. Add the DWARF information to the die. Obsolete, - /// please use addComplexAddress instead. - /// - void addBlockByrefAddress(DbgVariable *&DV, DIE *Die, unsigned Attribute, - const MachineLocation &Location); - - /// addVariableAddress - Add DW_AT_location attribute for a DbgVariable based - /// on provided frame index. - void addVariableAddress(DbgVariable *&DV, DIE *Die, int64_t FI); - - /// addToContextOwner - Add Die into the list of its context owner's children. - void addToContextOwner(DIE *Die, DIDescriptor Context); - - /// addType - Add a new type attribute to the specified entity. - void addType(DIE *Entity, DIType Ty); - - - /// getOrCreateNameSpace - Create a DIE for DINameSpace. - DIE *getOrCreateNameSpace(DINameSpace NS); - - /// getOrCreateTypeDIE - Find existing DIE or create new DIE for the - /// given DIType. - DIE *getOrCreateTypeDIE(DIType Ty); - - /// getOrCreateTemplateTypeParameterDIE - Find existing DIE or create new DIE - /// for the given DITemplateTypeParameter. - DIE *getOrCreateTemplateTypeParameterDIE(DITemplateTypeParameter TP); - - /// getOrCreateTemplateValueParameterDIE - Find existing DIE or create new DIE - /// for the given DITemplateValueParameter. - DIE *getOrCreateTemplateValueParameterDIE(DITemplateValueParameter TVP); - - void addPubTypes(DISubprogram SP); - - /// constructTypeDIE - Construct basic type die from DIBasicType. - void constructTypeDIE(DIE &Buffer, - DIBasicType BTy); - - /// constructTypeDIE - Construct derived type die from DIDerivedType. - void constructTypeDIE(DIE &Buffer, - DIDerivedType DTy); - - /// constructTypeDIE - Construct type DIE from DICompositeType. - void constructTypeDIE(DIE &Buffer, - DICompositeType CTy); - - /// constructSubrangeDIE - Construct subrange DIE from DISubrange. - void constructSubrangeDIE(DIE &Buffer, DISubrange SR, DIE *IndexTy); - - /// constructArrayTypeDIE - Construct array type DIE from DICompositeType. - void constructArrayTypeDIE(DIE &Buffer, - DICompositeType *CTy); - - /// constructEnumTypeDIE - Construct enum type DIE from DIEnumerator. - DIE *constructEnumTypeDIE(DIEnumerator ETy); - - /// createMemberDIE - Create new member DIE. - DIE *createMemberDIE(DIDerivedType DT); - - /// createSubprogramDIE - Create new DIE using SP. - DIE *createSubprogramDIE(DISubprogram SP); - /// getOrCreateDbgScope - Create DbgScope for the scope. DbgScope *getOrCreateDbgScope(const MDNode *Scope, const MDNode *InlinedAt); @@ -455,14 +353,6 @@ private: /// void emitEndOfLineMatrix(unsigned SectionEnd); - /// emitCommonDebugFrame - Emit common frame info into a debug frame section. - /// - void emitCommonDebugFrame(); - - /// emitFunctionDebugFrame - Emit per function frame info into a debug frame - /// section. - void emitFunctionDebugFrame(const FunctionDebugFrameInfo &DebugFrameInfo); - /// emitDebugPubNames - Emit visible names into a debug pubnames section. /// void emitDebugPubNames(); @@ -511,11 +401,6 @@ private: /// inlining instance. void emitDebugInlineInfo(); - /// GetOrCreateSourceID - Look up the source id with the given directory and - /// source file names. If none currently exists, create a new id and insert it - /// in the SourceIds map. - unsigned GetOrCreateSourceID(StringRef DirName, StringRef FullName); - /// constructCompileUnit - Create new CompileUnit for the given /// metadata node with tag DW_TAG_compile_unit. void constructCompileUnit(const MDNode *N); @@ -532,7 +417,8 @@ private: /// recordSourceLine - Register a source line with debug info. Returns the /// unique label that was emitted and which provides correspondence to /// the source line list. - void recordSourceLine(unsigned Line, unsigned Col, const MDNode *Scope); + void recordSourceLine(unsigned Line, unsigned Col, const MDNode *Scope, + unsigned Flags); /// recordVariableFrameIndex - Record a variable's index. void recordVariableFrameIndex(const DbgVariable *V, int Index); @@ -611,6 +497,14 @@ public: /// endInstruction - Prcess end of an instruction. void endInstruction(const MachineInstr *MI); + + /// GetOrCreateSourceID - Look up the source id with the given directory and + /// source file names. If none currently exists, create a new id and insert it + /// in the SourceIds map. + unsigned GetOrCreateSourceID(StringRef DirName, StringRef FullName); + + /// createSubprogramDIE - Create new DIE using SP. + DIE *createSubprogramDIE(DISubprogram SP); }; } // End of namespace llvm diff --git a/lib/CodeGen/AsmPrinter/DwarfException.h b/lib/CodeGen/AsmPrinter/DwarfException.h index 06b1de6..b5f86ab 100644 --- a/lib/CodeGen/AsmPrinter/DwarfException.h +++ b/lib/CodeGen/AsmPrinter/DwarfException.h @@ -15,6 +15,7 @@ #define LLVM_CODEGEN_ASMPRINTER_DWARFEXCEPTION_H #include "llvm/ADT/DenseMap.h" +#include "llvm/CodeGen/AsmPrinter.h" #include <vector> namespace llvm { @@ -140,17 +141,20 @@ public: }; class DwarfCFIException : public DwarfException { - /// shouldEmitTable - Per-function flag to indicate if EH tables should - /// be emitted. - bool shouldEmitTable; + /// shouldEmitPersonality - Per-function flag to indicate if .cfi_personality + /// should be emitted. + bool shouldEmitPersonality; + + /// shouldEmitLSDA - Per-function flag to indicate if .cfi_lsda + /// should be emitted. + bool shouldEmitLSDA; /// shouldEmitMoves - Per-function flag to indicate if frame moves info /// should be emitted. bool shouldEmitMoves; - /// shouldEmitTableModule - Per-module flag to indicate if EH tables - /// should be emitted. - bool shouldEmitTableModule; + AsmPrinter::CFIMoveType moveTypeModule; + public: //===--------------------------------------------------------------------===// // Main entry points. @@ -170,7 +174,7 @@ public: virtual void EndFunction(); }; -class DwarfTableException : public DwarfException { +class ARMException : public DwarfException { /// shouldEmitTable - Per-function flag to indicate if EH tables should /// be emitted. bool shouldEmitTable; @@ -182,48 +186,12 @@ class DwarfTableException : public DwarfException { /// shouldEmitTableModule - Per-module flag to indicate if EH tables /// should be emitted. bool shouldEmitTableModule; - - /// shouldEmitMovesModule - Per-module flag to indicate if frame moves - /// should be emitted. - bool shouldEmitMovesModule; - - struct FunctionEHFrameInfo { - MCSymbol *FunctionEHSym; // L_foo.eh - unsigned Number; - unsigned PersonalityIndex; - bool adjustsStack; - bool hasLandingPads; - std::vector<MachineMove> Moves; - const Function *function; - - FunctionEHFrameInfo(MCSymbol *EHSym, unsigned Num, unsigned P, - bool hC, bool hL, - const std::vector<MachineMove> &M, - const Function *f): - FunctionEHSym(EHSym), Number(Num), PersonalityIndex(P), - adjustsStack(hC), hasLandingPads(hL), Moves(M), function (f) { } - }; - - std::vector<FunctionEHFrameInfo> EHFrames; - - /// UsesLSDA - Indicates whether an FDE that uses the CIE at the given index - /// uses an LSDA. If so, then we need to encode that information in the CIE's - /// augmentation. - DenseMap<unsigned, bool> UsesLSDA; - - /// EmitCIE - Emit a Common Information Entry (CIE). This holds information - /// that is shared among many Frame Description Entries. There is at least - /// one CIE in every non-empty .debug_frame section. - void EmitCIE(const Function *Personality, unsigned Index); - - /// EmitFDE - Emit the Frame Description Entry (FDE) for the function. - void EmitFDE(const FunctionEHFrameInfo &EHFrameInfo); public: //===--------------------------------------------------------------------===// // Main entry points. // - DwarfTableException(AsmPrinter *A); - virtual ~DwarfTableException(); + ARMException(AsmPrinter *A); + virtual ~ARMException(); /// EndModule - Emit all exception information that should come after the /// content. @@ -237,25 +205,25 @@ public: virtual void EndFunction(); }; +class Win64Exception : public DwarfException { + /// shouldEmitPersonality - Per-function flag to indicate if personality + /// info should be emitted. + bool shouldEmitPersonality; -class ARMException : public DwarfException { - /// shouldEmitTable - Per-function flag to indicate if EH tables should - /// be emitted. - bool shouldEmitTable; + /// shouldEmitLSDA - Per-function flag to indicate if the LSDA + /// should be emitted. + bool shouldEmitLSDA; /// shouldEmitMoves - Per-function flag to indicate if frame moves info /// should be emitted. bool shouldEmitMoves; - /// shouldEmitTableModule - Per-module flag to indicate if EH tables - /// should be emitted. - bool shouldEmitTableModule; public: //===--------------------------------------------------------------------===// // Main entry points. // - ARMException(AsmPrinter *A); - virtual ~ARMException(); + Win64Exception(AsmPrinter *A); + virtual ~Win64Exception(); /// EndModule - Emit all exception information that should come after the /// content. diff --git a/lib/CodeGen/AsmPrinter/DwarfTableException.cpp b/lib/CodeGen/AsmPrinter/DwarfTableException.cpp deleted file mode 100644 index 7519011..0000000 --- a/lib/CodeGen/AsmPrinter/DwarfTableException.cpp +++ /dev/null @@ -1,349 +0,0 @@ -//===-- CodeGen/AsmPrinter/DwarfTableException.cpp - Dwarf Exception Impl --==// -// -// The LLVM Compiler Infrastructure -// -// This file is distributed under the University of Illinois Open Source -// License. See LICENSE.TXT for details. -// -//===----------------------------------------------------------------------===// -// -// This file contains support for writing DWARF exception info into asm files. -// The implementation emits all the necessary tables "by hands". -// -//===----------------------------------------------------------------------===// - -#include "DwarfException.h" -#include "llvm/Module.h" -#include "llvm/CodeGen/AsmPrinter.h" -#include "llvm/CodeGen/MachineModuleInfo.h" -#include "llvm/CodeGen/MachineFrameInfo.h" -#include "llvm/CodeGen/MachineFunction.h" -#include "llvm/CodeGen/MachineLocation.h" -#include "llvm/MC/MCAsmInfo.h" -#include "llvm/MC/MCContext.h" -#include "llvm/MC/MCExpr.h" -#include "llvm/MC/MCSection.h" -#include "llvm/MC/MCStreamer.h" -#include "llvm/MC/MCSymbol.h" -#include "llvm/Target/Mangler.h" -#include "llvm/Target/TargetData.h" -#include "llvm/Target/TargetFrameLowering.h" -#include "llvm/Target/TargetLoweringObjectFile.h" -#include "llvm/Target/TargetMachine.h" -#include "llvm/Target/TargetOptions.h" -#include "llvm/Target/TargetRegisterInfo.h" -#include "llvm/Support/Dwarf.h" -#include "llvm/Support/FormattedStream.h" -#include "llvm/ADT/SmallString.h" -#include "llvm/ADT/StringExtras.h" -#include "llvm/ADT/Twine.h" -using namespace llvm; - -DwarfTableException::DwarfTableException(AsmPrinter *A) - : DwarfException(A), - shouldEmitTable(false), shouldEmitMoves(false), - shouldEmitTableModule(false), shouldEmitMovesModule(false) {} - -DwarfTableException::~DwarfTableException() {} - -/// EmitCIE - Emit a Common Information Entry (CIE). This holds information that -/// is shared among many Frame Description Entries. There is at least one CIE -/// in every non-empty .debug_frame section. -void DwarfTableException::EmitCIE(const Function *PersonalityFn, unsigned Index) { - // Size and sign of stack growth. - int stackGrowth = Asm->getTargetData().getPointerSize(); - if (Asm->TM.getFrameLowering()->getStackGrowthDirection() == - TargetFrameLowering::StackGrowsDown) - stackGrowth *= -1; - - const TargetLoweringObjectFile &TLOF = Asm->getObjFileLowering(); - - // Begin eh frame section. - Asm->OutStreamer.SwitchSection(TLOF.getEHFrameSection()); - - MCSymbol *EHFrameSym; - if (TLOF.isFunctionEHFrameSymbolPrivate()) - EHFrameSym = Asm->GetTempSymbol("EH_frame", Index); - else - EHFrameSym = Asm->OutContext.GetOrCreateSymbol(Twine("EH_frame") + - Twine(Index)); - Asm->OutStreamer.EmitLabel(EHFrameSym); - - Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("section_eh_frame", Index)); - - // Define base labels. - Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("eh_frame_common", Index)); - - // Define the eh frame length. - Asm->OutStreamer.AddComment("Length of Common Information Entry"); - Asm->EmitLabelDifference(Asm->GetTempSymbol("eh_frame_common_end", Index), - Asm->GetTempSymbol("eh_frame_common_begin", Index), - 4); - - // EH frame header. - Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("eh_frame_common_begin",Index)); - Asm->OutStreamer.AddComment("CIE Identifier Tag"); - Asm->OutStreamer.EmitIntValue(0, 4/*size*/, 0/*addrspace*/); - Asm->OutStreamer.AddComment("DW_CIE_VERSION"); - Asm->OutStreamer.EmitIntValue(dwarf::DW_CIE_VERSION, 1/*size*/, 0/*addr*/); - - // The personality presence indicates that language specific information will - // show up in the eh frame. Find out how we are supposed to lower the - // personality function reference: - - unsigned LSDAEncoding = TLOF.getLSDAEncoding(); - unsigned FDEEncoding = TLOF.getFDEEncoding(); - unsigned PerEncoding = TLOF.getPersonalityEncoding(); - - char Augmentation[6] = { 0 }; - unsigned AugmentationSize = 0; - char *APtr = Augmentation + 1; - - if (PersonalityFn) { - // There is a personality function. - *APtr++ = 'P'; - AugmentationSize += 1 + Asm->GetSizeOfEncodedValue(PerEncoding); - } - - if (UsesLSDA[Index]) { - // An LSDA pointer is in the FDE augmentation. - *APtr++ = 'L'; - ++AugmentationSize; - } - - if (FDEEncoding != dwarf::DW_EH_PE_absptr) { - // A non-default pointer encoding for the FDE. - *APtr++ = 'R'; - ++AugmentationSize; - } - - if (APtr != Augmentation + 1) - Augmentation[0] = 'z'; - - Asm->OutStreamer.AddComment("CIE Augmentation"); - Asm->OutStreamer.EmitBytes(StringRef(Augmentation, strlen(Augmentation)+1),0); - - // Round out reader. - Asm->EmitULEB128(1, "CIE Code Alignment Factor"); - Asm->EmitSLEB128(stackGrowth, "CIE Data Alignment Factor"); - Asm->OutStreamer.AddComment("CIE Return Address Column"); - - const TargetRegisterInfo *RI = Asm->TM.getRegisterInfo(); - const TargetFrameLowering *TFI = Asm->TM.getFrameLowering(); - Asm->EmitInt8(RI->getDwarfRegNum(RI->getRARegister(), true)); - - if (Augmentation[0]) { - Asm->EmitULEB128(AugmentationSize, "Augmentation Size"); - - // If there is a personality, we need to indicate the function's location. - if (PersonalityFn) { - Asm->EmitEncodingByte(PerEncoding, "Personality"); - Asm->OutStreamer.AddComment("Personality"); - Asm->EmitReference(PersonalityFn, PerEncoding); - } - if (UsesLSDA[Index]) - Asm->EmitEncodingByte(LSDAEncoding, "LSDA"); - if (FDEEncoding != dwarf::DW_EH_PE_absptr) - Asm->EmitEncodingByte(FDEEncoding, "FDE"); - } - - // Indicate locations of general callee saved registers in frame. - std::vector<MachineMove> Moves; - TFI->getInitialFrameState(Moves); - Asm->EmitFrameMoves(Moves, 0, true); - - // On Darwin the linker honors the alignment of eh_frame, which means it must - // be 8-byte on 64-bit targets to match what gcc does. Otherwise you get - // holes which confuse readers of eh_frame. - Asm->EmitAlignment(Asm->getTargetData().getPointerSize() == 4 ? 2 : 3); - Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("eh_frame_common_end", Index)); -} - -/// EmitFDE - Emit the Frame Description Entry (FDE) for the function. -void DwarfTableException::EmitFDE(const FunctionEHFrameInfo &EHFrameInfo) { - assert(!EHFrameInfo.function->hasAvailableExternallyLinkage() && - "Should not emit 'available externally' functions at all"); - - const Function *TheFunc = EHFrameInfo.function; - const TargetLoweringObjectFile &TLOF = Asm->getObjFileLowering(); - - unsigned LSDAEncoding = TLOF.getLSDAEncoding(); - unsigned FDEEncoding = TLOF.getFDEEncoding(); - - Asm->OutStreamer.SwitchSection(TLOF.getEHFrameSection()); - - // Externally visible entry into the functions eh frame info. If the - // corresponding function is static, this should not be externally visible. - if (!TheFunc->hasLocalLinkage() && TLOF.isFunctionEHSymbolGlobal()) - Asm->OutStreamer.EmitSymbolAttribute(EHFrameInfo.FunctionEHSym,MCSA_Global); - - // If corresponding function is weak definition, this should be too. - if (TheFunc->isWeakForLinker() && Asm->MAI->getWeakDefDirective()) - Asm->OutStreamer.EmitSymbolAttribute(EHFrameInfo.FunctionEHSym, - MCSA_WeakDefinition); - - // If corresponding function is hidden, this should be too. - if (TheFunc->hasHiddenVisibility()) - if (MCSymbolAttr HiddenAttr = Asm->MAI->getHiddenVisibilityAttr()) - Asm->OutStreamer.EmitSymbolAttribute(EHFrameInfo.FunctionEHSym, - HiddenAttr); - - // If there are no calls then you can't unwind. This may mean we can omit the - // EH Frame, but some environments do not handle weak absolute symbols. If - // UnwindTablesMandatory is set we cannot do this optimization; the unwind - // info is to be available for non-EH uses. - if (!EHFrameInfo.adjustsStack && !UnwindTablesMandatory && - (!TheFunc->isWeakForLinker() || - !Asm->MAI->getWeakDefDirective() || - TLOF.getSupportsWeakOmittedEHFrame())) { - Asm->OutStreamer.EmitAssignment(EHFrameInfo.FunctionEHSym, - MCConstantExpr::Create(0, Asm->OutContext)); - // This name has no connection to the function, so it might get - // dead-stripped when the function is not, erroneously. Prohibit - // dead-stripping unconditionally. - if (Asm->MAI->hasNoDeadStrip()) - Asm->OutStreamer.EmitSymbolAttribute(EHFrameInfo.FunctionEHSym, - MCSA_NoDeadStrip); - } else { - Asm->OutStreamer.EmitLabel(EHFrameInfo.FunctionEHSym); - - // EH frame header. - Asm->OutStreamer.AddComment("Length of Frame Information Entry"); - Asm->EmitLabelDifference( - Asm->GetTempSymbol("eh_frame_end", EHFrameInfo.Number), - Asm->GetTempSymbol("eh_frame_begin", EHFrameInfo.Number), 4); - - Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("eh_frame_begin", - EHFrameInfo.Number)); - - Asm->OutStreamer.AddComment("FDE CIE offset"); - Asm->EmitLabelDifference( - Asm->GetTempSymbol("eh_frame_begin", EHFrameInfo.Number), - Asm->GetTempSymbol("eh_frame_common", - EHFrameInfo.PersonalityIndex), 4); - - MCSymbol *EHFuncBeginSym = - Asm->GetTempSymbol("eh_func_begin", EHFrameInfo.Number); - - Asm->OutStreamer.AddComment("FDE initial location"); - Asm->EmitReference(EHFuncBeginSym, FDEEncoding); - - Asm->OutStreamer.AddComment("FDE address range"); - Asm->EmitLabelDifference(Asm->GetTempSymbol("eh_func_end", - EHFrameInfo.Number), - EHFuncBeginSym, - Asm->GetSizeOfEncodedValue(FDEEncoding)); - - // If there is a personality and landing pads then point to the language - // specific data area in the exception table. - if (MMI->getPersonalities()[0] != NULL) { - unsigned Size = Asm->GetSizeOfEncodedValue(LSDAEncoding); - - Asm->EmitULEB128(Size, "Augmentation size"); - Asm->OutStreamer.AddComment("Language Specific Data Area"); - if (EHFrameInfo.hasLandingPads) - Asm->EmitReference(Asm->GetTempSymbol("exception", EHFrameInfo.Number), - LSDAEncoding); - else - Asm->OutStreamer.EmitIntValue(0, Size/*size*/, 0/*addrspace*/); - - } else { - Asm->EmitULEB128(0, "Augmentation size"); - } - - // Indicate locations of function specific callee saved registers in frame. - Asm->EmitFrameMoves(EHFrameInfo.Moves, EHFuncBeginSym, true); - - // On Darwin the linker honors the alignment of eh_frame, which means it - // must be 8-byte on 64-bit targets to match what gcc does. Otherwise you - // get holes which confuse readers of eh_frame. - Asm->EmitAlignment(Asm->getTargetData().getPointerSize() == 4 ? 2 : 3); - Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("eh_frame_end", - EHFrameInfo.Number)); - - // If the function is marked used, this table should be also. We cannot - // make the mark unconditional in this case, since retaining the table also - // retains the function in this case, and there is code around that depends - // on unused functions (calling undefined externals) being dead-stripped to - // link correctly. Yes, there really is. - if (MMI->isUsedFunction(EHFrameInfo.function)) - if (Asm->MAI->hasNoDeadStrip()) - Asm->OutStreamer.EmitSymbolAttribute(EHFrameInfo.FunctionEHSym, - MCSA_NoDeadStrip); - } - Asm->OutStreamer.AddBlankLine(); -} - -/// EndModule - Emit all exception information that should come after the -/// content. -void DwarfTableException::EndModule() { - if (!Asm->MAI->isExceptionHandlingDwarf()) - return; - - if (!shouldEmitMovesModule && !shouldEmitTableModule) - return; - - const std::vector<const Function*> &Personalities = MMI->getPersonalities(); - - for (unsigned I = 0, E = Personalities.size(); I < E; ++I) - EmitCIE(Personalities[I], I); - - for (std::vector<FunctionEHFrameInfo>::iterator - I = EHFrames.begin(), E = EHFrames.end(); I != E; ++I) - EmitFDE(*I); -} - -/// BeginFunction - Gather pre-function exception information. Assumes it's -/// being emitted immediately after the function entry point. -void DwarfTableException::BeginFunction(const MachineFunction *MF) { - shouldEmitTable = shouldEmitMoves = false; - - // If any landing pads survive, we need an EH table. - shouldEmitTable = !MMI->getLandingPads().empty(); - - // See if we need frame move info. - shouldEmitMoves = - !Asm->MF->getFunction()->doesNotThrow() || UnwindTablesMandatory; - - if (shouldEmitMoves || shouldEmitTable) - // Assumes in correct section after the entry point. - Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("eh_func_begin", - Asm->getFunctionNumber())); - - shouldEmitTableModule |= shouldEmitTable; - shouldEmitMovesModule |= shouldEmitMoves; -} - -/// EndFunction - Gather and emit post-function exception information. -/// -void DwarfTableException::EndFunction() { - if (!shouldEmitMoves && !shouldEmitTable) return; - - Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("eh_func_end", - Asm->getFunctionNumber())); - - // Record if this personality index uses a landing pad. - bool HasLandingPad = !MMI->getLandingPads().empty(); - UsesLSDA[MMI->getPersonalityIndex()] |= HasLandingPad; - - // Map all labels and get rid of any dead landing pads. - MMI->TidyLandingPads(); - - if (HasLandingPad) - EmitExceptionTable(); - - const TargetLoweringObjectFile &TLOF = Asm->getObjFileLowering(); - MCSymbol *FunctionEHSym = - Asm->GetSymbolWithGlobalValueBase(Asm->MF->getFunction(), ".eh", - TLOF.isFunctionEHFrameSymbolPrivate()); - - // Save EH frame information - EHFrames. - push_back(FunctionEHFrameInfo(FunctionEHSym, - Asm->getFunctionNumber(), - MMI->getPersonalityIndex(), - Asm->MF->getFrameInfo()->adjustsStack(), - !MMI->getLandingPads().empty(), - MMI->getFrameMoves(), - Asm->MF->getFunction())); -} diff --git a/lib/CodeGen/AsmPrinter/Win64Exception.cpp b/lib/CodeGen/AsmPrinter/Win64Exception.cpp new file mode 100644 index 0000000..c2ad5eb --- /dev/null +++ b/lib/CodeGen/AsmPrinter/Win64Exception.cpp @@ -0,0 +1,116 @@ +//===-- CodeGen/AsmPrinter/Win64Exception.cpp - Dwarf Exception Impl ------===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file contains support for writing Win64 exception info into asm files. +// +//===----------------------------------------------------------------------===// + +#include "DwarfException.h" +#include "llvm/Module.h" +#include "llvm/CodeGen/AsmPrinter.h" +#include "llvm/CodeGen/MachineModuleInfo.h" +#include "llvm/CodeGen/MachineFrameInfo.h" +#include "llvm/CodeGen/MachineFunction.h" +#include "llvm/CodeGen/MachineLocation.h" +#include "llvm/MC/MCAsmInfo.h" +#include "llvm/MC/MCContext.h" +#include "llvm/MC/MCExpr.h" +#include "llvm/MC/MCSection.h" +#include "llvm/MC/MCStreamer.h" +#include "llvm/MC/MCSymbol.h" +#include "llvm/Target/Mangler.h" +#include "llvm/Target/TargetData.h" +#include "llvm/Target/TargetFrameLowering.h" +#include "llvm/Target/TargetLoweringObjectFile.h" +#include "llvm/Target/TargetMachine.h" +#include "llvm/Target/TargetOptions.h" +#include "llvm/Target/TargetRegisterInfo.h" +#include "llvm/Support/Dwarf.h" +#include "llvm/Support/ErrorHandling.h" +#include "llvm/Support/FormattedStream.h" +#include "llvm/ADT/SmallString.h" +#include "llvm/ADT/StringExtras.h" +#include "llvm/ADT/Twine.h" +using namespace llvm; + +Win64Exception::Win64Exception(AsmPrinter *A) + : DwarfException(A), + shouldEmitPersonality(false), shouldEmitLSDA(false), shouldEmitMoves(false) + {} + +Win64Exception::~Win64Exception() {} + +/// EndModule - Emit all exception information that should come after the +/// content. +void Win64Exception::EndModule() { +} + +/// BeginFunction - Gather pre-function exception information. Assumes it's +/// being emitted immediately after the function entry point. +void Win64Exception::BeginFunction(const MachineFunction *MF) { + shouldEmitMoves = shouldEmitPersonality = shouldEmitLSDA = false; + + // If any landing pads survive, we need an EH table. + bool hasLandingPads = !MMI->getLandingPads().empty(); + + shouldEmitMoves = Asm->needsSEHMoves(); + + const TargetLoweringObjectFile &TLOF = Asm->getObjFileLowering(); + unsigned PerEncoding = TLOF.getPersonalityEncoding(); + const Function *Per = MMI->getPersonalities()[MMI->getPersonalityIndex()]; + + shouldEmitPersonality = hasLandingPads && + PerEncoding != dwarf::DW_EH_PE_omit && Per; + + unsigned LSDAEncoding = TLOF.getLSDAEncoding(); + shouldEmitLSDA = shouldEmitPersonality && + LSDAEncoding != dwarf::DW_EH_PE_omit; + + if (!shouldEmitPersonality && !shouldEmitMoves) + return; + + Asm->OutStreamer.EmitWin64EHStartProc(Asm->CurrentFnSym); + + if (!shouldEmitPersonality) + return; + + MCSymbol *GCCHandlerSym = + Asm->GetExternalSymbolSymbol("_GCC_specific_handler"); + Asm->OutStreamer.EmitWin64EHHandler(GCCHandlerSym, true, true); + + Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("eh_func_begin", + Asm->getFunctionNumber())); +} + +/// EndFunction - Gather and emit post-function exception information. +/// +void Win64Exception::EndFunction() { + if (!shouldEmitPersonality && !shouldEmitMoves) + return; + + Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("eh_func_end", + Asm->getFunctionNumber())); + + // Map all labels and get rid of any dead landing pads. + MMI->TidyLandingPads(); + + if (shouldEmitPersonality) { + const TargetLoweringObjectFile &TLOF = Asm->getObjFileLowering(); + const Function *Per = MMI->getPersonalities()[MMI->getPersonalityIndex()]; + const MCSymbol *Sym = TLOF.getCFIPersonalitySymbol(Per, Asm->Mang, MMI); + + Asm->OutStreamer.PushSection(); + Asm->OutStreamer.EmitWin64EHHandlerData(); + Asm->OutStreamer.EmitValue(MCSymbolRefExpr::Create(Sym, Asm->OutContext), + 4); + EmitExceptionTable(); + Asm->OutStreamer.PopSection(); + } + Asm->OutStreamer.EmitWin64EHEndProc(); +} |