diff options
| author | Anton Korobeynikov <asl@math.spbu.ru> | 2008-08-17 13:53:04 +0000 |
|---|---|---|
| committer | Anton Korobeynikov <asl@math.spbu.ru> | 2008-08-17 13:53:04 +0000 |
| commit | 9cb0e94dc79657144d639c722619e1e4fc19040e (patch) | |
| tree | 7f8d4c34fe8cc89d3415000012d6b5cc3457819e /llvm/lib/CodeGen/DwarfWriter.cpp | |
| parent | f01991a0d41ad3b052f43ab6e65bd10501d398d0 (diff) | |
| download | bcm5719-llvm-9cb0e94dc79657144d639c722619e1e4fc19040e.tar.gz bcm5719-llvm-9cb0e94dc79657144d639c722619e1e4fc19040e.zip | |
Move all assembler printing related stuff into new libAsmPrinter
llvm-svn: 54885
Diffstat (limited to 'llvm/lib/CodeGen/DwarfWriter.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/DwarfWriter.cpp | 3930 |
1 files changed, 0 insertions, 3930 deletions
diff --git a/llvm/lib/CodeGen/DwarfWriter.cpp b/llvm/lib/CodeGen/DwarfWriter.cpp deleted file mode 100644 index 5d6acc30ba8..00000000000 --- a/llvm/lib/CodeGen/DwarfWriter.cpp +++ /dev/null @@ -1,3930 +0,0 @@ -//===-- llvm/CodeGen/DwarfWriter.cpp - Dwarf Framework ----------*- 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 info into asm files. -// -//===----------------------------------------------------------------------===// - -#include "llvm/CodeGen/DwarfWriter.h" - -#include "llvm/ADT/DenseMap.h" -#include "llvm/ADT/FoldingSet.h" -#include "llvm/ADT/StringExtras.h" -#include "llvm/ADT/UniqueVector.h" -#include "llvm/Module.h" -#include "llvm/Type.h" -#include "llvm/CodeGen/AsmPrinter.h" -#include "llvm/CodeGen/MachineModuleInfo.h" -#include "llvm/CodeGen/MachineFrameInfo.h" -#include "llvm/CodeGen/MachineLocation.h" -#include "llvm/Support/Debug.h" -#include "llvm/Support/Dwarf.h" -#include "llvm/Support/CommandLine.h" -#include "llvm/Support/DataTypes.h" -#include "llvm/Support/Mangler.h" -#include "llvm/System/Path.h" -#include "llvm/Target/TargetAsmInfo.h" -#include "llvm/Target/TargetRegisterInfo.h" -#include "llvm/Target/TargetData.h" -#include "llvm/Target/TargetFrameInfo.h" -#include "llvm/Target/TargetInstrInfo.h" -#include "llvm/Target/TargetMachine.h" -#include "llvm/Target/TargetOptions.h" -#include <ostream> -#include <string> -using namespace llvm; -using namespace llvm::dwarf; - -namespace llvm { - -//===----------------------------------------------------------------------===// - -/// Configuration values for initial hash set sizes (log2). -/// -static const unsigned InitDiesSetSize = 9; // 512 -static const unsigned InitAbbreviationsSetSize = 9; // 512 -static const unsigned InitValuesSetSize = 9; // 512 - -//===----------------------------------------------------------------------===// -/// Forward declarations. -/// -class DIE; -class DIEValue; - -//===----------------------------------------------------------------------===// -/// DWLabel - Labels are used to track locations in the assembler file. -/// Labels appear in the form @verbatim <prefix><Tag><Number> @endverbatim, -/// where the tag is a category of label (Ex. location) and number is a value -/// unique in that category. -class DWLabel { -public: - /// Tag - Label category tag. Should always be a staticly declared C string. - /// - const char *Tag; - - /// Number - Value to make label unique. - /// - unsigned Number; - - DWLabel(const char *T, unsigned N) : Tag(T), Number(N) {} - - void Profile(FoldingSetNodeID &ID) const { - ID.AddString(std::string(Tag)); - ID.AddInteger(Number); - } - -#ifndef NDEBUG - void print(std::ostream *O) const { - if (O) print(*O); - } - void print(std::ostream &O) const { - O << "." << Tag; - if (Number) O << Number; - } -#endif -}; - -//===----------------------------------------------------------------------===// -/// DIEAbbrevData - Dwarf abbreviation data, describes the one attribute of a -/// Dwarf abbreviation. -class DIEAbbrevData { -private: - /// Attribute - Dwarf attribute code. - /// - unsigned Attribute; - - /// Form - Dwarf form code. - /// - unsigned Form; - -public: - DIEAbbrevData(unsigned A, unsigned F) - : Attribute(A) - , Form(F) - {} - - // Accessors. - unsigned getAttribute() const { return Attribute; } - unsigned getForm() const { return Form; } - - /// Profile - Used to gather unique data for the abbreviation folding set. - /// - void Profile(FoldingSetNodeID &ID)const { - ID.AddInteger(Attribute); - ID.AddInteger(Form); - } -}; - -//===----------------------------------------------------------------------===// -/// DIEAbbrev - Dwarf abbreviation, describes the organization of a debug -/// information object. -class DIEAbbrev : public FoldingSetNode { -private: - /// Tag - Dwarf tag code. - /// - unsigned Tag; - - /// Unique number for node. - /// - unsigned Number; - - /// ChildrenFlag - Dwarf children flag. - /// - unsigned ChildrenFlag; - - /// Data - Raw data bytes for abbreviation. - /// - SmallVector<DIEAbbrevData, 8> Data; - -public: - - DIEAbbrev(unsigned T, unsigned C) - : Tag(T) - , ChildrenFlag(C) - , Data() - {} - ~DIEAbbrev() {} - - // Accessors. - unsigned getTag() const { return Tag; } - unsigned getNumber() const { return Number; } - unsigned getChildrenFlag() const { return ChildrenFlag; } - const SmallVector<DIEAbbrevData, 8> &getData() const { return Data; } - void setTag(unsigned T) { Tag = T; } - void setChildrenFlag(unsigned CF) { ChildrenFlag = CF; } - void setNumber(unsigned N) { Number = N; } - - /// AddAttribute - Adds another set of attribute information to the - /// abbreviation. - void AddAttribute(unsigned Attribute, unsigned Form) { - Data.push_back(DIEAbbrevData(Attribute, Form)); - } - - /// AddFirstAttribute - Adds a set of attribute information to the front - /// of the abbreviation. - void AddFirstAttribute(unsigned Attribute, unsigned Form) { - Data.insert(Data.begin(), DIEAbbrevData(Attribute, Form)); - } - - /// Profile - Used to gather unique data for the abbreviation folding set. - /// - void Profile(FoldingSetNodeID &ID) { - ID.AddInteger(Tag); - ID.AddInteger(ChildrenFlag); - - // For each attribute description. - for (unsigned i = 0, N = Data.size(); i < N; ++i) - Data[i].Profile(ID); - } - - /// Emit - Print the abbreviation using the specified Dwarf writer. - /// - void Emit(const DwarfDebug &DD) const; - -#ifndef NDEBUG - void print(std::ostream *O) { - if (O) print(*O); - } - void print(std::ostream &O); - void dump(); -#endif -}; - -//===----------------------------------------------------------------------===// -/// DIE - A structured debug information entry. Has an abbreviation which -/// describes it's organization. -class DIE : public FoldingSetNode { -protected: - /// Abbrev - Buffer for constructing abbreviation. - /// - DIEAbbrev Abbrev; - - /// Offset - Offset in debug info section. - /// - unsigned Offset; - - /// Size - Size of instance + children. - /// - unsigned Size; - - /// Children DIEs. - /// - std::vector<DIE *> Children; - - /// Attributes values. - /// - SmallVector<DIEValue*, 32> Values; - -public: - explicit DIE(unsigned Tag) - : Abbrev(Tag, DW_CHILDREN_no) - , Offset(0) - , Size(0) - , Children() - , Values() - {} - virtual ~DIE(); - - // Accessors. - DIEAbbrev &getAbbrev() { return Abbrev; } - unsigned getAbbrevNumber() const { - return Abbrev.getNumber(); - } - unsigned getTag() const { return Abbrev.getTag(); } - unsigned getOffset() const { return Offset; } - unsigned getSize() const { return Size; } - const std::vector<DIE *> &getChildren() const { return Children; } - SmallVector<DIEValue*, 32> &getValues() { return Values; } - void setTag(unsigned Tag) { Abbrev.setTag(Tag); } - void setOffset(unsigned O) { Offset = O; } - void setSize(unsigned S) { Size = S; } - - /// AddValue - Add a value and attributes to a DIE. - /// - void AddValue(unsigned Attribute, unsigned Form, DIEValue *Value) { - Abbrev.AddAttribute(Attribute, Form); - Values.push_back(Value); - } - - /// SiblingOffset - Return the offset of the debug information entry's - /// sibling. - unsigned SiblingOffset() const { return Offset + Size; } - - /// AddSiblingOffset - Add a sibling offset field to the front of the DIE. - /// - void AddSiblingOffset(); - - /// AddChild - Add a child to the DIE. - /// - void AddChild(DIE *Child) { - Abbrev.setChildrenFlag(DW_CHILDREN_yes); - Children.push_back(Child); - } - - /// Detach - Detaches objects connected to it after copying. - /// - void Detach() { - Children.clear(); - } - - /// Profile - Used to gather unique data for the value folding set. - /// - void Profile(FoldingSetNodeID &ID) ; - -#ifndef NDEBUG - void print(std::ostream *O, unsigned IncIndent = 0) { - if (O) print(*O, IncIndent); - } - void print(std::ostream &O, unsigned IncIndent = 0); - void dump(); -#endif -}; - -//===----------------------------------------------------------------------===// -/// DIEValue - A debug information entry value. -/// -class DIEValue : public FoldingSetNode { -public: - enum { - isInteger, - isString, - isLabel, - isAsIsLabel, - isSectionOffset, - isDelta, - isEntry, - isBlock - }; - - /// Type - Type of data stored in the value. - /// - unsigned Type; - - explicit DIEValue(unsigned T) - : Type(T) - {} - virtual ~DIEValue() {} - - // Accessors - unsigned getType() const { return Type; } - - // Implement isa/cast/dyncast. - static bool classof(const DIEValue *) { return true; } - - /// EmitValue - Emit value via the Dwarf writer. - /// - virtual void EmitValue(DwarfDebug &DD, unsigned Form) = 0; - - /// SizeOf - Return the size of a value in bytes. - /// - virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const = 0; - - /// Profile - Used to gather unique data for the value folding set. - /// - virtual void Profile(FoldingSetNodeID &ID) = 0; - -#ifndef NDEBUG - void print(std::ostream *O) { - if (O) print(*O); - } - virtual void print(std::ostream &O) = 0; - void dump(); -#endif -}; - -//===----------------------------------------------------------------------===// -/// DWInteger - An integer value DIE. -/// -class DIEInteger : public DIEValue { -private: - uint64_t Integer; - -public: - explicit DIEInteger(uint64_t I) : DIEValue(isInteger), Integer(I) {} - - // Implement isa/cast/dyncast. - static bool classof(const DIEInteger *) { return true; } - static bool classof(const DIEValue *I) { return I->Type == isInteger; } - - /// BestForm - Choose the best form for integer. - /// - static unsigned BestForm(bool IsSigned, uint64_t Integer) { - if (IsSigned) { - if ((char)Integer == (signed)Integer) return DW_FORM_data1; - if ((short)Integer == (signed)Integer) return DW_FORM_data2; - if ((int)Integer == (signed)Integer) return DW_FORM_data4; - } else { - if ((unsigned char)Integer == Integer) return DW_FORM_data1; - if ((unsigned short)Integer == Integer) return DW_FORM_data2; - if ((unsigned int)Integer == Integer) return DW_FORM_data4; - } - return DW_FORM_data8; - } - - /// EmitValue - Emit integer of appropriate size. - /// - virtual void EmitValue(DwarfDebug &DD, unsigned Form); - - /// SizeOf - Determine size of integer value in bytes. - /// - virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const; - - /// Profile - Used to gather unique data for the value folding set. - /// - static void Profile(FoldingSetNodeID &ID, unsigned Integer) { - ID.AddInteger(isInteger); - ID.AddInteger(Integer); - } - virtual void Profile(FoldingSetNodeID &ID) { Profile(ID, Integer); } - -#ifndef NDEBUG - virtual void print(std::ostream &O) { - O << "Int: " << (int64_t)Integer - << " 0x" << std::hex << Integer << std::dec; - } -#endif -}; - -//===----------------------------------------------------------------------===// -/// DIEString - A string value DIE. -/// -class DIEString : public DIEValue { -public: - const std::string String; - - explicit DIEString(const std::string &S) : DIEValue(isString), String(S) {} - - // Implement isa/cast/dyncast. - static bool classof(const DIEString *) { return true; } - static bool classof(const DIEValue *S) { return S->Type == isString; } - - /// EmitValue - Emit string value. - /// - virtual void EmitValue(DwarfDebug &DD, unsigned Form); - - /// SizeOf - Determine size of string value in bytes. - /// - virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const { - return String.size() + sizeof(char); // sizeof('\0'); - } - - /// Profile - Used to gather unique data for the value folding set. - /// - static void Profile(FoldingSetNodeID &ID, const std::string &String) { - ID.AddInteger(isString); - ID.AddString(String); - } - virtual void Profile(FoldingSetNodeID &ID) { Profile(ID, String); } - -#ifndef NDEBUG - virtual void print(std::ostream &O) { - O << "Str: \"" << String << "\""; - } -#endif -}; - -//===----------------------------------------------------------------------===// -/// DIEDwarfLabel - A Dwarf internal label expression DIE. -// -class DIEDwarfLabel : public DIEValue { -public: - - const DWLabel Label; - - explicit DIEDwarfLabel(const DWLabel &L) : DIEValue(isLabel), Label(L) {} - - // Implement isa/cast/dyncast. - static bool classof(const DIEDwarfLabel *) { return true; } - static bool classof(const DIEValue *L) { return L->Type == isLabel; } - - /// EmitValue - Emit label value. - /// - virtual void EmitValue(DwarfDebug &DD, unsigned Form); - - /// SizeOf - Determine size of label value in bytes. - /// - virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const; - - /// Profile - Used to gather unique data for the value folding set. - /// - static void Profile(FoldingSetNodeID &ID, const DWLabel &Label) { - ID.AddInteger(isLabel); - Label.Profile(ID); - } - virtual void Profile(FoldingSetNodeID &ID) { Profile(ID, Label); } - -#ifndef NDEBUG - virtual void print(std::ostream &O) { - O << "Lbl: "; - Label.print(O); - } -#endif -}; - - -//===----------------------------------------------------------------------===// -/// DIEObjectLabel - A label to an object in code or data. -// -class DIEObjectLabel : public DIEValue { -public: - const std::string Label; - - explicit DIEObjectLabel(const std::string &L) - : DIEValue(isAsIsLabel), Label(L) {} - - // Implement isa/cast/dyncast. - static bool classof(const DIEObjectLabel *) { return true; } - static bool classof(const DIEValue *L) { return L->Type == isAsIsLabel; } - - /// EmitValue - Emit label value. - /// - virtual void EmitValue(DwarfDebug &DD, unsigned Form); - - /// SizeOf - Determine size of label value in bytes. - /// - virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const; - - /// Profile - Used to gather unique data for the value folding set. - /// - static void Profile(FoldingSetNodeID &ID, const std::string &Label) { - ID.AddInteger(isAsIsLabel); - ID.AddString(Label); - } - virtual void Profile(FoldingSetNodeID &ID) { Profile(ID, Label); } - -#ifndef NDEBUG - virtual void print(std::ostream &O) { - O << "Obj: " << Label; - } -#endif -}; - -//===----------------------------------------------------------------------===// -/// DIESectionOffset - A section offset DIE. -// -class DIESectionOffset : public DIEValue { -public: - const DWLabel Label; - const DWLabel Section; - bool IsEH : 1; - bool UseSet : 1; - - DIESectionOffset(const DWLabel &Lab, const DWLabel &Sec, - bool isEH = false, bool useSet = true) - : DIEValue(isSectionOffset), Label(Lab), Section(Sec), - IsEH(isEH), UseSet(useSet) {} - - // Implement isa/cast/dyncast. - static bool classof(const DIESectionOffset *) { return true; } - static bool classof(const DIEValue *D) { return D->Type == isSectionOffset; } - - /// EmitValue - Emit section offset. - /// - virtual void EmitValue(DwarfDebug &DD, unsigned Form); - - /// SizeOf - Determine size of section offset value in bytes. - /// - virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const; - - /// Profile - Used to gather unique data for the value folding set. - /// - static void Profile(FoldingSetNodeID &ID, const DWLabel &Label, - const DWLabel &Section) { - ID.AddInteger(isSectionOffset); - Label.Profile(ID); - Section.Profile(ID); - // IsEH and UseSet are specific to the Label/Section that we will emit - // the offset for; so Label/Section are enough for uniqueness. - } - virtual void Profile(FoldingSetNodeID &ID) { Profile(ID, Label, Section); } - -#ifndef NDEBUG - virtual void print(std::ostream &O) { - O << "Off: "; - Label.print(O); - O << "-"; - Section.print(O); - O << "-" << IsEH << "-" << UseSet; - } -#endif -}; - -//===----------------------------------------------------------------------===// -/// DIEDelta - A simple label difference DIE. -/// -class DIEDelta : public DIEValue { -public: - const DWLabel LabelHi; - const DWLabel LabelLo; - - DIEDelta(const DWLabel &Hi, const DWLabel &Lo) - : DIEValue(isDelta), LabelHi(Hi), LabelLo(Lo) {} - - // Implement isa/cast/dyncast. - static bool classof(const DIEDelta *) { return true; } - static bool classof(const DIEValue *D) { return D->Type == isDelta; } - - /// EmitValue - Emit delta value. - /// - virtual void EmitValue(DwarfDebug &DD, unsigned Form); - - /// SizeOf - Determine size of delta value in bytes. - /// - virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const; - - /// Profile - Used to gather unique data for the value folding set. - /// - static void Profile(FoldingSetNodeID &ID, const DWLabel &LabelHi, - const DWLabel &LabelLo) { - ID.AddInteger(isDelta); - LabelHi.Profile(ID); - LabelLo.Profile(ID); - } - virtual void Profile(FoldingSetNodeID &ID) { Profile(ID, LabelHi, LabelLo); } - -#ifndef NDEBUG - virtual void print(std::ostream &O) { - O << "Del: "; - LabelHi.print(O); - O << "-"; - LabelLo.print(O); - } -#endif -}; - -//===----------------------------------------------------------------------===// -/// DIEntry - A pointer to another debug information entry. An instance of this -/// class can also be used as a proxy for a debug information entry not yet -/// defined (ie. types.) -class DIEntry : public DIEValue { -public: - DIE *Entry; - - explicit DIEntry(DIE *E) : DIEValue(isEntry), Entry(E) {} - - // Implement isa/cast/dyncast. - static bool classof(const DIEntry *) { return true; } - static bool classof(const DIEValue *E) { return E->Type == isEntry; } - - /// EmitValue - Emit debug information entry offset. - /// - virtual void EmitValue(DwarfDebug &DD, unsigned Form); - - /// SizeOf - Determine size of debug information entry in bytes. - /// - virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const { - return sizeof(int32_t); - } - - /// Profile - Used to gather unique data for the value folding set. - /// - static void Profile(FoldingSetNodeID &ID, DIE *Entry) { - ID.AddInteger(isEntry); - ID.AddPointer(Entry); - } - virtual void Profile(FoldingSetNodeID &ID) { - ID.AddInteger(isEntry); - - if (Entry) { - ID.AddPointer(Entry); - } else { - ID.AddPointer(this); - } - } - -#ifndef NDEBUG - virtual void print(std::ostream &O) { - O << "Die: 0x" << std::hex << (intptr_t)Entry << std::dec; - } -#endif -}; - -//===----------------------------------------------------------------------===// -/// DIEBlock - A block of values. Primarily used for location expressions. -// -class DIEBlock : public DIEValue, public DIE { -public: - unsigned Size; // Size in bytes excluding size header. - - DIEBlock() - : DIEValue(isBlock) - , DIE(0) - , Size(0) - {} - ~DIEBlock() { - } - - // Implement isa/cast/dyncast. - static bool classof(const DIEBlock *) { return true; } - static bool classof(const DIEValue *E) { return E->Type == isBlock; } - - /// ComputeSize - calculate the size of the block. - /// - unsigned ComputeSize(DwarfDebug &DD); - - /// BestForm - Choose the best form for data. - /// - unsigned BestForm() const { - if ((unsigned char)Size == Size) return DW_FORM_block1; - if ((unsigned short)Size == Size) return DW_FORM_block2; - if ((unsigned int)Size == Size) return DW_FORM_block4; - return DW_FORM_block; - } - - /// EmitValue - Emit block data. - /// - virtual void EmitValue(DwarfDebug &DD, unsigned Form); - - /// SizeOf - Determine size of block data in bytes. - /// - virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const; - - - /// Profile - Used to gather unique data for the value folding set. - /// - virtual void Profile(FoldingSetNodeID &ID) { - ID.AddInteger(isBlock); - DIE::Profile(ID); - } - -#ifndef NDEBUG - virtual void print(std::ostream &O) { - O << "Blk: "; - DIE::print(O, 5); - } -#endif -}; - -//===----------------------------------------------------------------------===// -/// CompileUnit - This dwarf writer support class manages information associate -/// with a source file. -class CompileUnit { -private: - /// Desc - Compile unit debug descriptor. - /// - CompileUnitDesc *Desc; - - /// ID - File identifier for source. - /// - unsigned ID; - - /// Die - Compile unit debug information entry. - /// - DIE *Die; - - /// DescToDieMap - Tracks the mapping of unit level debug informaton - /// descriptors to debug information entries. - std::map<DebugInfoDesc *, DIE *> DescToDieMap; - - /// DescToDIEntryMap - Tracks the mapping of unit level debug informaton - /// descriptors to debug information entries using a DIEntry proxy. - std::map<DebugInfoDesc *, DIEntry *> DescToDIEntryMap; - - /// Globals - A map of globally visible named entities for this unit. - /// - std::map<std::string, DIE *> Globals; - - /// DiesSet - Used to uniquely define dies within the compile unit. - /// - FoldingSet<DIE> DiesSet; - - /// Dies - List of all dies in the compile unit. - /// - std::vector<DIE *> Dies; - -public: - CompileUnit(CompileUnitDesc *CUD, unsigned I, DIE *D) - : Desc(CUD) - , ID(I) - , Die(D) - , DescToDieMap() - , DescToDIEntryMap() - , Globals() - , DiesSet(InitDiesSetSize) - , Dies() - {} - - ~CompileUnit() { - delete Die; - - for (unsigned i = 0, N = Dies.size(); i < N; ++i) - delete Dies[i]; - } - - // Accessors. - CompileUnitDesc *getDesc() const { return Desc; } - unsigned getID() const { return ID; } - DIE* getDie() const { return Die; } - std::map<std::string, DIE *> &getGlobals() { return Globals; } - - /// hasContent - Return true if this compile unit has something to write out. - /// - bool hasContent() const { - return !Die->getChildren().empty(); - } - - /// AddGlobal - Add a new global entity to the compile unit. - /// - void AddGlobal(const std::string &Name, DIE *Die) { - Globals[Name] = Die; - } - - /// getDieMapSlotFor - Returns the debug information entry map slot for the - /// specified debug descriptor. - DIE *&getDieMapSlotFor(DebugInfoDesc *DID) { - return DescToDieMap[DID]; - } - - /// getDIEntrySlotFor - Returns the debug information entry proxy slot for the - /// specified debug descriptor. - DIEntry *&getDIEntrySlotFor(DebugInfoDesc *DID) { - return DescToDIEntryMap[DID]; - } - - /// AddDie - Adds or interns the DIE to the compile unit. - /// - DIE *AddDie(DIE &Buffer) { - FoldingSetNodeID ID; - Buffer.Profile(ID); - void *Where; - DIE *Die = DiesSet.FindNodeOrInsertPos(ID, Where); - - if (!Die) { - Die = new DIE(Buffer); - DiesSet.InsertNode(Die, Where); - this->Die->AddChild(Die); - Buffer.Detach(); - } - - return Die; - } -}; - -//===----------------------------------------------------------------------===// -/// Dwarf - Emits general Dwarf directives. -/// -class Dwarf { - -protected: - - //===--------------------------------------------------------------------===// - // Core attributes used by the Dwarf writer. - // - - // - /// O - Stream to .s file. - /// - std::ostream &O; - - /// Asm - Target of Dwarf emission. - /// - AsmPrinter *Asm; - - /// TAI - Target asm information. - const TargetAsmInfo *TAI; - - /// TD - Target data. - const TargetData *TD; - - /// RI - Register Information. - const TargetRegisterInfo *RI; - - /// M - Current module. - /// - Module *M; - - /// MF - Current machine function. - /// - MachineFunction *MF; - - /// MMI - Collected machine module information. - /// - MachineModuleInfo *MMI; - - /// SubprogramCount - The running count of functions being compiled. - /// - unsigned SubprogramCount; - - /// Flavor - A unique string indicating what dwarf producer this is, used to - /// unique labels. - const char * const Flavor; - - unsigned SetCounter; - Dwarf(std::ostream &OS, AsmPrinter *A, const TargetAsmInfo *T, - const char *flavor) - : O(OS) - , Asm(A) - , TAI(T) - , TD(Asm->TM.getTargetData()) - , RI(Asm->TM.getRegisterInfo()) - , M(NULL) - , MF(NULL) - , MMI(NULL) - , SubprogramCount(0) - , Flavor(flavor) - , SetCounter(1) - { - } - -public: - - //===--------------------------------------------------------------------===// - // Accessors. - // - AsmPrinter *getAsm() const { return Asm; } - MachineModuleInfo *getMMI() const { return MMI; } - const TargetAsmInfo *getTargetAsmInfo() const { return TAI; } - const TargetData *getTargetData() const { return TD; } - - void PrintRelDirective(bool Force32Bit = false, bool isInSection = false) - const { - if (isInSection && TAI->getDwarfSectionOffsetDirective()) - O << TAI->getDwarfSectionOffsetDirective(); - else if (Force32Bit || TD->getPointerSize() == sizeof(int32_t)) - O << TAI->getData32bitsDirective(); - else - O << TAI->getData64bitsDirective(); - } - - /// PrintLabelName - Print label name in form used by Dwarf writer. - /// - void PrintLabelName(DWLabel Label) const { - PrintLabelName(Label.Tag, Label.Number); - } - void PrintLabelName(const char *Tag, unsigned Number) const { - O << TAI->getPrivateGlobalPrefix() << Tag; - if (Number) O << Number; - } - - void PrintLabelName(const char *Tag, unsigned Number, - const char *Suffix) const { - O << TAI->getPrivateGlobalPrefix() << Tag; - if (Number) O << Number; - O << Suffix; - } - - /// EmitLabel - Emit location label for internal use by Dwarf. - /// - void EmitLabel(DWLabel Label) const { - EmitLabel(Label.Tag, Label.Number); - } - void EmitLabel(const char *Tag, unsigned Number) const { - PrintLabelName(Tag, Number); - O << ":\n"; - } - - /// EmitReference - Emit a reference to a label. - /// - void EmitReference(DWLabel Label, bool IsPCRelative = false, - bool Force32Bit = false) const { - EmitReference(Label.Tag, Label.Number, IsPCRelative, Force32Bit); - } - void EmitReference(const char *Tag, unsigned Number, - bool IsPCRelative = false, bool Force32Bit = false) const { - PrintRelDirective(Force32Bit); - PrintLabelName(Tag, Number); - - if (IsPCRelative) O << "-" << TAI->getPCSymbol(); - } - void EmitReference(const std::string &Name, bool IsPCRelative = false, - bool Force32Bit = false) const { - PrintRelDirective(Force32Bit); - - O << Name; - - if (IsPCRelative) O << "-" << TAI->getPCSymbol(); - } - - /// EmitDifference - Emit the difference between two labels. Some - /// assemblers do not behave with absolute expressions with data directives, - /// so there is an option (needsSet) to use an intermediary set expression. - void EmitDifference(DWLabel LabelHi, DWLabel LabelLo, - bool IsSmall = false) { - EmitDifference(LabelHi.Tag, LabelHi.Number, - LabelLo.Tag, LabelLo.Number, - IsSmall); - } - void EmitDifference(const char *TagHi, unsigned NumberHi, - const char *TagLo, unsigned NumberLo, - bool IsSmall = false) { - if (TAI->needsSet()) { - O << "\t.set\t"; - PrintLabelName("set", SetCounter, Flavor); - O << ","; - PrintLabelName(TagHi, NumberHi); - O << "-"; - PrintLabelName(TagLo, NumberLo); - O << "\n"; - - PrintRelDirective(IsSmall); - PrintLabelName("set", SetCounter, Flavor); - ++SetCounter; - } else { - PrintRelDirective(IsSmall); - - PrintLabelName(TagHi, NumberHi); - O << "-"; - PrintLabelName(TagLo, NumberLo); - } - } - - void EmitSectionOffset(const char* Label, const char* Section, - unsigned LabelNumber, unsigned SectionNumber, - bool IsSmall = false, bool isEH = false, - bool useSet = true) { - bool printAbsolute = false; - if (isEH) - printAbsolute = TAI->isAbsoluteEHSectionOffsets(); - else - printAbsolute = TAI->isAbsoluteDebugSectionOffsets(); - - if (TAI->needsSet() && useSet) { - O << "\t.set\t"; - PrintLabelName("set", SetCounter, Flavor); - O << ","; - PrintLabelName(Label, LabelNumber); - - if (!printAbsolute) { - O << "-"; - PrintLabelName(Section, SectionNumber); - } - O << "\n"; - - PrintRelDirective(IsSmall); - - PrintLabelName("set", SetCounter, Flavor); - ++SetCounter; - } else { - PrintRelDirective(IsSmall, true); - - PrintLabelName(Label, LabelNumber); - - if (!printAbsolute) { - O << "-"; - PrintLabelName(Section, SectionNumber); - } - } - } - - /// EmitFrameMoves - Emit frame instructions to describe the layout of the - /// frame. - void EmitFrameMoves(const char *BaseLabel, unsigned BaseLabelID, - const std::vector<MachineMove> &Moves, bool isEH) { - int stackGrowth = - Asm->TM.getFrameInfo()->getStackGrowthDirection() == - TargetFrameInfo::StackGrowsUp ? - TD->getPointerSize() : -TD->getPointerSize(); - bool IsLocal = BaseLabel && strcmp(BaseLabel, "label") == 0; - - for (unsigned i = 0, N = Moves.size(); i < N; ++i) { - const MachineMove &Move = Moves[i]; - unsigned LabelID = Move.getLabelID(); - - if (LabelID) { - LabelID = MMI->MappedLabel(LabelID); - - // Throw out move if the label is invalid. - if (!LabelID) continue; - } - - const MachineLocation &Dst = Move.getDestination(); - const MachineLocation &Src = Move.getSource(); - - // Advance row if new location. - if (BaseLabel && LabelID && (BaseLabelID != LabelID || !IsLocal)) { - Asm->EmitInt8(DW_CFA_advance_loc4); - Asm->EOL("DW_CFA_advance_loc4"); - EmitDifference("label", LabelID, BaseLabel, BaseLabelID, true); - Asm->EOL(); - - BaseLabelID = LabelID; - BaseLabel = "label"; - IsLocal = true; - } - - // If advancing cfa. - if (Dst.isRegister() && Dst.getRegister() == MachineLocation::VirtualFP) { - if (!Src.isRegister()) { - if (Src.getRegister() == MachineLocation::VirtualFP) { - Asm->EmitInt8(DW_CFA_def_cfa_offset); - Asm->EOL("DW_CFA_def_cfa_offset"); - } else { - Asm->EmitInt8(DW_CFA_def_cfa); - Asm->EOL("DW_CFA_def_cfa"); - Asm->EmitULEB128Bytes(RI->getDwarfRegNum(Src.getRegister(), isEH)); - Asm->EOL("Register"); - } - - int Offset = -Src.getOffset(); - - Asm->EmitULEB128Bytes(Offset); - Asm->EOL("Offset"); - } else { - assert(0 && "Machine move no supported yet."); - } - } else if (Src.isRegister() && - Src.getRegister() == MachineLocation::VirtualFP) { - if (Dst.isRegister()) { - Asm->EmitInt8(DW_CFA_def_cfa_register); - Asm->EOL("DW_CFA_def_cfa_register"); - Asm->EmitULEB128Bytes(RI->getDwarfRegNum(Dst.getRegister(), isEH)); - Asm->EOL("Register"); - } else { - assert(0 && "Machine move no supported yet."); - } - } else { - unsigned Reg = RI->getDwarfRegNum(Src.getRegister(), isEH); - int Offset = Dst.getOffset() / stackGrowth; - - if (Offset < 0) { - Asm->EmitInt8(DW_CFA_offset_extended_sf); - Asm->EOL("DW_CFA_offset_extended_sf"); - Asm->EmitULEB128Bytes(Reg); - Asm->EOL("Reg"); - Asm->EmitSLEB128Bytes(Offset); - Asm->EOL("Offset"); - } else if (Reg < 64) { - Asm->EmitInt8(DW_CFA_offset + Reg); - if (VerboseAsm) - Asm->EOL("DW_CFA_offset + Reg (" + utostr(Reg) + ")"); - else - Asm->EOL(); - Asm->EmitULEB128Bytes(Offset); - Asm->EOL("Offset"); - } else { - Asm->EmitInt8(DW_CFA_offset_extended); - Asm->EOL("DW_CFA_offset_extended"); - Asm->EmitULEB128Bytes(Reg); - Asm->EOL("Reg"); - Asm->EmitULEB128Bytes(Offset); - Asm->EOL("Offset"); - } - } - } - } - -}; - -//===----------------------------------------------------------------------===// -/// DwarfDebug - Emits Dwarf debug directives. -/// -class DwarfDebug : public Dwarf { - -private: - //===--------------------------------------------------------------------===// - // Attributes used to construct specific Dwarf sections. - // - - /// CompileUnits - All the compile units involved in this build. The index - /// of each entry in this vector corresponds to the sources in MMI. - std::vector<CompileUnit *> CompileUnits; - - /// AbbreviationsSet - Used to uniquely define abbreviations. - /// - FoldingSet<DIEAbbrev> AbbreviationsSet; - - /// Abbreviations - A list of all the unique abbreviations in use. - /// - std::vector<DIEAbbrev *> Abbreviations; - - /// ValuesSet - Used to uniquely define values. - /// - FoldingSet<DIEValue> ValuesSet; - - /// Values - A list of all the unique values in use. - /// - std::vector<DIEValue *> Values; - - /// StringPool - A UniqueVector of strings used by indirect references. - /// - UniqueVector<std::string> StringPool; - - /// UnitMap - Map debug information descriptor to compile unit. - /// - std::map<DebugInfoDesc *, CompileUnit *> DescToUnitMap; - - /// SectionMap - Provides a unique id per text section. - /// - UniqueVector<std::string> SectionMap; - - /// SectionSourceLines - Tracks line numbers per text section. - /// - std::vector<std::vector<SourceLineInfo> > SectionSourceLines; - - /// didInitial - Flag to indicate if initial emission has been done. - /// - bool didInitial; - - /// shouldEmit - Flag to indicate if debug information should be emitted. - /// - bool shouldEmit; - - struct FunctionDebugFrameInfo { - unsigned Number; - std::vector<MachineMove> Moves; - - FunctionDebugFrameInfo(unsigned Num, const std::vector<MachineMove> &M): - Number(Num), Moves(M) { } - }; - - std::vector<FunctionDebugFrameInfo> DebugFrames; - -public: - - /// ShouldEmitDwarf - Returns true if Dwarf declarations should be made. - /// - bool ShouldEmitDwarf() const { return shouldEmit; } - - /// AssignAbbrevNumber - Define a unique number for the abbreviation. - /// - void AssignAbbrevNumber(DIEAbbrev &Abbrev) { - // Profile the node so that we can make it unique. - FoldingSetNodeID ID; - Abbrev.Profile(ID); - - // Check the set for priors. - DIEAbbrev *InSet = AbbreviationsSet.GetOrInsertNode(&Abbrev); - - // If it's newly added. - if (InSet == &Abbrev) { - // Add to abbreviation list. - Abbreviations.push_back(&Abbrev); - // Assign the vector position + 1 as its number. - Abbrev.setNumber(Abbreviations.size()); - } else { - // Assign existing abbreviation number. - Abbrev.setNumber(InSet->getNumber()); - } - } - - /// NewString - Add a string to the constant pool and returns a label. - /// - DWLabel NewString(const std::string &String) { - unsigned StringID = StringPool.insert(String); - return DWLabel("string", StringID); - } - - /// NewDIEntry - Creates a new DIEntry to be a proxy for a debug information - /// entry. - DIEntry *NewDIEntry(DIE *Entry = NULL) { - DIEntry *Value; - - if (Entry) { - FoldingSetNodeID ID; - DIEntry::Profile(ID, Entry); - void *Where; - Value = static_cast<DIEntry *>(ValuesSet.FindNodeOrInsertPos(ID, Where)); - - if (Value) return Value; - - Value = new DIEntry(Entry); - ValuesSet.InsertNode(Value, Where); - } else { - Value = new DIEntry(Entry); - } - - Values.push_back(Value); - return Value; - } - - /// SetDIEntry - Set a DIEntry once the debug information entry is defined. - /// - void SetDIEntry(DIEntry *Value, DIE *Entry) { - Value->Entry = Entry; - // Add to values set if not already there. If it is, we merely have a - // duplicate in the values list (no harm.) - ValuesSet.GetOrInsertNode(Value); - } - - /// AddUInt - Add an unsigned integer attribute data and value. - /// - void AddUInt(DIE *Die, unsigned Attribute, unsigned Form, uint64_t Integer) { - if (!Form) Form = DIEInteger::BestForm(false, Integer); - - FoldingSetNodeID ID; - DIEInteger::Profile(ID, Integer); - void *Where; - DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where); - if (!Value) { - Value = new DIEInteger(Integer); - ValuesSet.InsertNode(Value, Where); - Values.push_back(Value); - } - - Die->AddValue(Attribute, Form, Value); - } - - /// AddSInt - Add an signed integer attribute data and value. - /// - void AddSInt(DIE *Die, unsigned Attribute, unsigned Form, int64_t Integer) { - if (!Form) Form = DIEInteger::BestForm(true, Integer); - - FoldingSetNodeID ID; - DIEInteger::Profile(ID, (uint64_t)Integer); - void *Where; - DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where); - if (!Value) { - Value = new DIEInteger(Integer); - ValuesSet.InsertNode(Value, Where); - Values.push_back(Value); - } - - Die->AddValue(Attribute, Form, Value); - } - - /// AddString - Add a std::string attribute data and value. - /// - void AddString(DIE *Die, unsigned Attribute, unsigned Form, - const std::string &String) { - FoldingSetNodeID ID; - DIEString::Profile(ID, String); - void *Where; - DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where); - if (!Value) { - Value = new DIEString(String); - ValuesSet.InsertNode(Value, Where); - Values.push_back(Value); - } - - Die->AddValue(Attribute, Form, Value); - } - - /// AddLabel - Add a Dwarf label attribute data and value. - /// - void AddLabel(DIE *Die, unsigned Attribute, unsigned Form, - const DWLabel &Label) { - FoldingSetNodeID ID; - DIEDwarfLabel::Profile(ID, Label); - void *Where; - DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where); - if (!Value) { - Value = new DIEDwarfLabel(Label); - ValuesSet.InsertNode(Value, Where); - Values.push_back(Value); - } - - Die->AddValue(Attribute, Form, Value); - } - - /// AddObjectLabel - Add an non-Dwarf label attribute data and value. - /// - void AddObjectLabel(DIE *Die, unsigned Attribute, unsigned Form, - const std::string &Label) { - FoldingSetNodeID ID; - DIEObjectLabel::Profile(ID, Label); - void *Where; - DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where); - if (!Value) { - Value = new DIEObjectLabel(Label); - ValuesSet.InsertNode(Value, Where); - Values.push_back(Value); - } - - Die->AddValue(Attribute, Form, Value); - } - - /// AddSectionOffset - Add a section offset label attribute data and value. - /// - void AddSectionOffset(DIE *Die, unsigned Attribute, unsigned Form, - const DWLabel &Label, const DWLabel &Section, - bool isEH = false, bool useSet = true) { - FoldingSetNodeID ID; - DIESectionOffset::Profile(ID, Label, Section); - void *Where; - DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where); - if (!Value) { - Value = new DIESectionOffset(Label, Section, isEH, useSet); - ValuesSet.InsertNode(Value, Where); - Values.push_back(Value); - } - - Die->AddValue(Attribute, Form, Value); - } - - /// AddDelta - Add a label delta attribute data and value. - /// - void AddDelta(DIE *Die, unsigned Attribute, unsigned Form, - const DWLabel &Hi, const DWLabel &Lo) { - FoldingSetNodeID ID; - DIEDelta::Profile(ID, Hi, Lo); - void *Where; - DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where); - if (!Value) { - Value = new DIEDelta(Hi, Lo); - ValuesSet.InsertNode(Value, Where); - Values.push_back(Value); - } - - Die->AddValue(Attribute, Form, Value); - } - - /// AddDIEntry - Add a DIE attribute data and value. - /// - void AddDIEntry(DIE *Die, unsigned Attribute, unsigned Form, DIE *Entry) { - Die->AddValue(Attribute, Form, NewDIEntry(Entry)); - } - - /// AddBlock - Add block data. - /// - void AddBlock(DIE *Die, unsigned Attribute, unsigned Form, DIEBlock *Block) { - Block->ComputeSize(*this); - FoldingSetNodeID ID; - Block->Profile(ID); - void *Where; - DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where); - if (!Value) { - Value = Block; - ValuesSet.InsertNode(Value, Where); - Values.push_back(Value); - } else { - // Already exists, reuse the previous one. - delete Block; - Block = cast<DIEBlock>(Value); - } - - Die->AddValue(Attribute, Block->BestForm(), Value); - } - -private: - - /// AddSourceLine - Add location information to specified debug information - /// entry. - void AddSourceLine(DIE *Die, CompileUnitDesc *File, unsigned Line) { - if (File && Line) { - CompileUnit *FileUnit = FindCompileUnit(File); - unsigned FileID = FileUnit->getID(); - AddUInt(Die, DW_AT_decl_file, 0, FileID); - AddUInt(Die, DW_AT_decl_line, 0, Line); - } - } - - /// AddAddress - Add an address attribute to a die based on the location - /// provided. - void AddAddress(DIE *Die, unsigned Attribute, - const MachineLocation &Location) { - unsigned Reg = RI->getDwarfRegNum(Location.getRegister(), false); - DIEBlock *Block = new DIEBlock(); - - if (Location.isRegister()) { - if (Reg < 32) { - AddUInt(Block, 0, DW_FORM_data1, DW_OP_reg0 + Reg); - } else { - AddUInt(Block, 0, DW_FORM_data1, DW_OP_regx); - AddUInt(Block, 0, DW_FORM_udata, Reg); - } - } else { - if (Reg < 32) { - AddUInt(Block, 0, DW_FORM_data1, DW_OP_breg0 + Reg); - } else { - AddUInt(Block, 0, DW_FORM_data1, DW_OP_bregx); - AddUInt(Block, 0, DW_FORM_udata, Reg); - } - AddUInt(Block, 0, DW_FORM_sdata, Location.getOffset()); - } - - AddBlock(Die, Attribute, 0, Block); - } - - /// AddBasicType - Add a new basic type attribute to the specified entity. - /// - void AddBasicType(DIE *Entity, CompileUnit *Unit, - const std::string &Name, - unsigned Encoding, unsigned Size) { - DIE *Die = ConstructBasicType(Unit, Name, Encoding, Size); - AddDIEntry(Entity, DW_AT_type, DW_FORM_ref4, Die); - } - - /// ConstructBasicType - Construct a new basic type. - /// - DIE *ConstructBasicType(CompileUnit *Unit, - const std::string &Name, - unsigned Encoding, unsigned Size) { - DIE Buffer(DW_TAG_base_type); - AddUInt(&Buffer, DW_AT_byte_size, 0, Size); - AddUInt(&Buffer, DW_AT_encoding, DW_FORM_data1, Encoding); - if (!Name.empty()) AddString(&Buffer, DW_AT_name, DW_FORM_string, Name); - return Unit->AddDie(Buffer); - } - - /// AddPointerType - Add a new pointer type attribute to the specified entity. - /// - void AddPointerType(DIE *Entity, CompileUnit *Unit, const std::string &Name) { - DIE *Die = ConstructPointerType(Unit, Name); - AddDIEntry(Entity, DW_AT_type, DW_FORM_ref4, Die); - } - - /// ConstructPointerType - Construct a new pointer type. - /// - DIE *ConstructPointerType(CompileUnit *Unit, const std::string &Name) { - DIE Buffer(DW_TAG_pointer_type); - AddUInt(&Buffer, DW_AT_byte_size, 0, TD->getPointerSize()); - if (!Name.empty()) AddString(&Buffer, DW_AT_name, DW_FORM_string, Name); - return Unit->AddDie(Buffer); - } - - /// AddType - Add a new type attribute to the specified entity. - /// - void AddType(DIE *Entity, TypeDesc *TyDesc, CompileUnit *Unit) { - if (!TyDesc) { - AddBasicType(Entity, Unit, "", DW_ATE_signed, sizeof(int32_t)); - } else { - // Check for pre-existence. - DIEntry *&Slot = Unit->getDIEntrySlotFor(TyDesc); - - // If it exists then use the existing value. - if (Slot) { - Entity->AddValue(DW_AT_type, DW_FORM_ref4, Slot); - return; - } - - if (SubprogramDesc *SubprogramTy = dyn_cast<SubprogramDesc>(TyDesc)) { - // FIXME - Not sure why programs and variables are coming through here. - // Short cut for handling subprogram types (not really a TyDesc.) - AddPointerType(Entity, Unit, SubprogramTy->getName()); - } else if (GlobalVariableDesc *GlobalTy = - dyn_cast<GlobalVariableDesc>(TyDesc)) { - // FIXME - Not sure why programs and variables are coming through here. - // Short cut for handling global variable types (not really a TyDesc.) - AddPointerType(Entity, Unit, GlobalTy->getName()); - } else { - // Set up proxy. - Slot = NewDIEntry(); - - // Construct type. - DIE Buffer(DW_TAG_base_type); - ConstructType(Buffer, TyDesc, Unit); - - // Add debug information entry to entity and unit. - DIE *Die = Unit->AddDie(Buffer); - SetDIEntry(Slot, Die); - Entity->AddValue(DW_AT_type, DW_FORM_ref4, Slot); - } - } - } - - /// ConstructType - Adds all the required attributes to the type. - /// - void ConstructType(DIE &Buffer, TypeDesc *TyDesc, CompileUnit *Unit) { - // Get core information. - const std::string &Name = TyDesc->getName(); - uint64_t Size = TyDesc->getSize() >> 3; - - if (BasicTypeDesc *BasicTy = dyn_cast<BasicTypeDesc>(TyDesc)) { - // Fundamental types like int, float, bool - Buffer.setTag(DW_TAG_base_type); - AddUInt(&Buffer, DW_AT_encoding, DW_FORM_data1, BasicTy->getEncoding()); - } else if (DerivedTypeDesc *DerivedTy = dyn_cast<DerivedTypeDesc>(TyDesc)) { - // Fetch tag. - unsigned Tag = DerivedTy->getTag(); - // FIXME - Workaround for templates. - if (Tag == DW_TAG_inheritance) Tag = DW_TAG_reference_type; - // Pointers, typedefs et al. - Buffer.setTag(Tag); - // Map to main type, void will not have a type. - if (TypeDesc *FromTy = DerivedTy->getFromType()) - AddType(&Buffer, FromTy, Unit); - } else if (CompositeTypeDesc *CompTy = dyn_cast<CompositeTypeDesc>(TyDesc)){ - // Fetch tag. - unsigned Tag = CompTy->getTag(); - - // Set tag accordingly. - if (Tag == DW_TAG_vector_type) - Buffer.setTag(DW_TAG_array_type); - else - Buffer.setTag(Tag); - - std::vector<DebugInfoDesc *> &Elements = CompTy->getElements(); - - switch (Tag) { - case DW_TAG_vector_type: - AddUInt(&Buffer, DW_AT_GNU_vector, DW_FORM_flag, 1); - // Fall thru - case DW_TAG_array_type: { - // Add element type. - if (TypeDesc *FromTy = CompTy->getFromType()) - AddType(&Buffer, FromTy, Unit); - - // Don't emit size attribute. - Size = 0; - - // Construct an anonymous type for index type. - DIE *IndexTy = ConstructBasicType(Unit, "", DW_ATE_signed, - sizeof(int32_t)); - - // Add subranges to array type. - for(unsigned i = 0, N = Elements.size(); i < N; ++i) { - SubrangeDesc *SRD = cast<SubrangeDesc>(Elements[i]); - int64_t Lo = SRD->getLo(); - int64_t Hi = SRD->getHi(); - DIE *Subrange = new DIE(DW_TAG_subrange_type); - - // If a range is available. - if (Lo != Hi) { - AddDIEntry(Subrange, DW_AT_type, DW_FORM_ref4, IndexTy); - // Only add low if non-zero. - if (Lo) AddSInt(Subrange, DW_AT_lower_bound, 0, Lo); - AddSInt(Subrange, DW_AT_upper_bound, 0, Hi); - } - - Buffer.AddChild(Subrange); - } - break; - } - case DW_TAG_structure_type: - case DW_TAG_union_type: { - // Add elements to structure type. - for(unsigned i = 0, N = Elements.size(); i < N; ++i) { - DebugInfoDesc *Element = Elements[i]; - - if (DerivedTypeDesc *MemberDesc = dyn_cast<DerivedTypeDesc>(Element)){ - // Add field or base class. - - unsigned Tag = MemberDesc->getTag(); - - // Extract the basic information. - const std::string &Name = MemberDesc->getName(); - uint64_t Size = MemberDesc->getSize(); - uint64_t Align = MemberDesc->getAlign(); - uint64_t Offset = MemberDesc->getOffset(); - - // Construct member debug information entry. - DIE *Member = new DIE(Tag); - - // Add name if not "". - if (!Name.empty()) - AddString(Member, DW_AT_name, DW_FORM_string, Name); - // Add location if available. - AddSourceLine(Member, MemberDesc->getFile(), MemberDesc->getLine()); - - // Most of the time the field info is the same as the members. - uint64_t FieldSize = Size; - uint64_t FieldAlign = Align; - uint64_t FieldOffset = Offset; - - // Set the member type. - TypeDesc *FromTy = MemberDesc->getFromType(); - AddType(Member, FromTy, Unit); - - // Walk up typedefs until a real size is found. - while (FromTy) { - if (FromTy->getTag() != DW_TAG_typedef) { - FieldSize = FromTy->getSize(); - FieldAlign = FromTy->getSize(); - break; - } - - FromTy = cast<DerivedTypeDesc>(FromTy)->getFromType(); - } - - // Unless we have a bit field. - if (Tag == DW_TAG_member && FieldSize != Size) { - // Construct the alignment mask. - uint64_t AlignMask = ~(FieldAlign - 1); - // Determine the high bit + 1 of the declared size. - uint64_t HiMark = (Offset + FieldSize) & AlignMask; - // Work backwards to determine the base offset of the field. - FieldOffset = HiMark - FieldSize; - // Now normalize offset to the field. - Offset -= FieldOffset; - - // Maybe we need to work from the other end. - if (TD->isLittleEndian()) Offset = FieldSize - (Offset + Size); - - // Add size and offset. - AddUInt(Member, DW_AT_byte_size, 0, FieldSize >> 3); - AddUInt(Member, DW_AT_bit_size, 0, Size); - AddUInt(Member, DW_AT_bit_offset, 0, Offset); - } - - // Add computation for offset. - DIEBlock *Block = new DIEBlock(); - AddUInt(Block, 0, DW_FORM_data1, DW_OP_plus_uconst); - AddUInt(Block, 0, DW_FORM_udata, FieldOffset >> 3); - AddBlock(Member, DW_AT_data_member_location, 0, Block); - - // Add accessibility (public default unless is base class. - if (MemberDesc->isProtected()) { - AddUInt(Member, DW_AT_accessibility, 0, DW_ACCESS_protected); - } else if (MemberDesc->isPrivate()) { - AddUInt(Member, DW_AT_accessibility, 0, DW_ACCESS_private); - } else if (Tag == DW_TAG_inheritance) { - AddUInt(Member, DW_AT_accessibility, 0, DW_ACCESS_public); - } - - Buffer.AddChild(Member); - } else if (GlobalVariableDesc *StaticDesc = - dyn_cast<GlobalVariableDesc>(Element)) { - // Add static member. - - // Construct member debug information entry. - DIE *Static = new DIE(DW_TAG_variable); - - // Add name and mangled name. - const std::string &Name = StaticDesc->getName(); - const std::string &LinkageName = StaticDesc->getLinkageName(); - AddString(Static, DW_AT_name, DW_FORM_string, Name); - if (!LinkageName.empty()) { - AddString(Static, DW_AT_MIPS_linkage_name, DW_FORM_string, - LinkageName); - } - - // Add location. - AddSourceLine(Static, StaticDesc->getFile(), StaticDesc->getLine()); - - // Add type. - if (TypeDesc *StaticTy = StaticDesc->getType()) - AddType(Static, StaticTy, Unit); - - // Add flags. - if (!StaticDesc->isStatic()) - AddUInt(Static, DW_AT_external, DW_FORM_flag, 1); - AddUInt(Static, DW_AT_declaration, DW_FORM_flag, 1); - - Buffer.AddChild(Static); - } else if (SubprogramDesc *MethodDesc = - dyn_cast<SubprogramDesc>(Element)) { - // Add member function. - - // Construct member debug information entry. - DIE *Method = new DIE(DW_TAG_subprogram); - - // Add name and mangled name. - const std::string &Name = MethodDesc->getName(); - const std::string &LinkageName = MethodDesc->getLinkageName(); - - AddString(Method, DW_AT_name, DW_FORM_string, Name); - bool IsCTor = TyDesc->getName() == Name; - - if (!LinkageName.empty()) { - AddString(Method, DW_AT_MIPS_linkage_name, DW_FORM_string, - LinkageName); - } - - // Add location. - AddSourceLine(Method, MethodDesc->getFile(), MethodDesc->getLine()); - - // Add type. - if (CompositeTypeDesc *MethodTy = - dyn_cast_or_null<CompositeTypeDesc>(MethodDesc->getType())) { - // Get argument information. - std::vector<DebugInfoDesc *> &Args = MethodTy->getElements(); - - // If not a ctor. - if (!IsCTor) { - // Add return type. - AddType(Method, dyn_cast<TypeDesc>(Args[0]), Unit); - } - - // Add arguments. - for(unsigned i = 1, N = Args.size(); i < N; ++i) { - DIE *Arg = new DIE(DW_TAG_formal_parameter); - AddType(Arg, cast<TypeDesc>(Args[i]), Unit); - AddUInt(Arg, DW_AT_artificial, DW_FORM_flag, 1); - Method->AddChild(Arg); - } - } - - // Add flags. - if (!MethodDesc->isStatic()) - AddUInt(Method, DW_AT_external, DW_FORM_flag, 1); - AddUInt(Method, DW_AT_declaration, DW_FORM_flag, 1); - - Buffer.AddChild(Method); - } - } - break; - } - case DW_TAG_enumeration_type: { - // Add enumerators to enumeration type. - for(unsigned i = 0, N = Elements.size(); i < N; ++i) { - EnumeratorDesc *ED = cast<EnumeratorDesc>(Elements[i]); - const std::string &Name = ED->getName(); - int64_t Value = ED->getValue(); - DIE *Enumerator = new DIE(DW_TAG_enumerator); - AddString(Enumerator, DW_AT_name, DW_FORM_string, Name); - AddSInt(Enumerator, DW_AT_const_value, DW_FORM_sdata, Value); - Buffer.AddChild(Enumerator); - } - - break; - } - case DW_TAG_subroutine_type: { - // Add prototype flag. - AddUInt(&Buffer, DW_AT_prototyped, DW_FORM_flag, 1); - // Add return type. - AddType(&Buffer, dyn_cast<TypeDesc>(Elements[0]), Unit); - - // Add arguments. - for(unsigned i = 1, N = Elements.size(); i < N; ++i) { - DIE *Arg = new DIE(DW_TAG_formal_parameter); - AddType(Arg, cast<TypeDesc>(Elements[i]), Unit); - Buffer.AddChild(Arg); - } - - break; - } - default: break; - } - } - - // Add size if non-zero (derived types don't have a size.) - if (Size) AddUInt(&Buffer, DW_AT_byte_size, 0, Size); - // Add name if not anonymous or intermediate type. - if (!Name.empty()) AddString(&Buffer, DW_AT_name, DW_FORM_string, Name); - // Add source line info if available. - AddSourceLine(&Buffer, TyDesc->getFile(), TyDesc->getLine()); - } - - /// NewCompileUnit - Create new compile unit and it's debug information entry. - /// - CompileUnit *NewCompileUnit(CompileUnitDesc *UnitDesc, unsigned ID) { - // Construct debug information entry. - DIE *Die = new DIE(DW_TAG_compile_unit); - AddSectionOffset(Die, DW_AT_stmt_list, DW_FORM_data4, - DWLabel("section_line", 0), DWLabel("section_line", 0), false); - AddString(Die, DW_AT_producer, DW_FORM_string, UnitDesc->getProducer()); - AddUInt (Die, DW_AT_language, DW_FORM_data1, UnitDesc->getLanguage()); - AddString(Die, DW_AT_name, DW_FORM_string, UnitDesc->getFileName()); - AddString(Die, DW_AT_comp_dir, DW_FORM_string, UnitDesc->getDirectory()); - - // Construct compile unit. - CompileUnit *Unit = new CompileUnit(UnitDesc, ID, Die); - - // Add Unit to compile unit map. - DescToUnitMap[UnitDesc] = Unit; - - return Unit; - } - - /// GetBaseCompileUnit - Get the main compile unit. - /// - CompileUnit *GetBaseCompileUnit() const { - CompileUnit *Unit = CompileUnits[0]; - assert(Unit && "Missing compile unit."); - return Unit; - } - - /// FindCompileUnit - Get the compile unit for the given descriptor. - /// - CompileUnit *FindCompileUnit(CompileUnitDesc *UnitDesc) { - CompileUnit *Unit = DescToUnitMap[UnitDesc]; - assert(Unit && "Missing compile unit."); - return Unit; - } - - /// NewGlobalVariable - Add a new global variable DIE. - /// - DIE *NewGlobalVariable(GlobalVariableDesc *GVD) { - // Get the compile unit context. - CompileUnitDesc *UnitDesc = - static_cast<CompileUnitDesc *>(GVD->getContext()); - CompileUnit *Unit = GetBaseCompileUnit(); - - // Check for pre-existence. - DIE *&Slot = Unit->getDieMapSlotFor(GVD); - if (Slot) return Slot; - - // Get the global variable itself. - GlobalVariable *GV = GVD->getGlobalVariable(); - - const std::string &Name = GVD->getName(); - const std::string &FullName = GVD->getFullName(); - const std::string &LinkageName = GVD->getLinkageName(); - // Create the global's variable DIE. - DIE *VariableDie = new DIE(DW_TAG_variable); - AddString(VariableDie, DW_AT_name, DW_FORM_string, Name); - if (!LinkageName.empty()) { - AddString(VariableDie, DW_AT_MIPS_linkage_name, DW_FORM_string, - LinkageName); - } - AddType(VariableDie, GVD->getType(), Unit); - if (!GVD->isStatic()) - AddUInt(VariableDie, DW_AT_external, DW_FORM_flag, 1); - - // Add source line info if available. - AddSourceLine(VariableDie, UnitDesc, GVD->getLine()); - - // Add address. - DIEBlock *Block = new DIEBlock(); - AddUInt(Block, 0, DW_FORM_data1, DW_OP_addr); - AddObjectLabel(Block, 0, DW_FORM_udata, Asm->getGlobalLinkName(GV)); - AddBlock(VariableDie, DW_AT_location, 0, Block); - - // Add to map. - Slot = VariableDie; - - // Add to context owner. - Unit->getDie()->AddChild(VariableDie); - - // Expose as global. - // FIXME - need to check external flag. - Unit->AddGlobal(FullName, VariableDie); - - return VariableDie; - } - - /// NewSubprogram - Add a new subprogram DIE. - /// - DIE *NewSubprogram(SubprogramDesc *SPD) { - // Get the compile unit context. - CompileUnitDesc *UnitDesc = - static_cast<CompileUnitDesc *>(SPD->getContext()); - CompileUnit *Unit = GetBaseCompileUnit(); - - // Check for pre-existence. - DIE *&Slot = Unit->getDieMapSlotFor(SPD); - if (Slot) return Slot; - - // Gather the details (simplify add attribute code.) - const std::string &Name = SPD->getName(); - const std::string &FullName = SPD->getFullName(); - const std::string &LinkageName = SPD->getLinkageName(); - - DIE *SubprogramDie = new DIE(DW_TAG_subprogram); - AddString(SubprogramDie, DW_AT_name, DW_FORM_string, Name); - if (!LinkageName.empty()) { - AddString(SubprogramDie, DW_AT_MIPS_linkage_name, DW_FORM_string, - LinkageName); - } - if (SPD->getType()) AddType(SubprogramDie, SPD->getType(), Unit); - if (!SPD->isStatic()) - AddUInt(SubprogramDie, DW_AT_external, DW_FORM_flag, 1); - AddUInt(SubprogramDie, DW_AT_prototyped, DW_FORM_flag, 1); - - // Add source line info if available. - AddSourceLine(SubprogramDie, UnitDesc, SPD->getLine()); - - // Add to map. - Slot = SubprogramDie; - - // Add to context owner. - Unit->getDie()->AddChild(SubprogramDie); - - // Expose as global. - Unit->AddGlobal(FullName, SubprogramDie); - - return SubprogramDie; - } - - /// NewScopeVariable - Create a new scope variable. - /// - DIE *NewScopeVariable(DebugVariable *DV, CompileUnit *Unit) { - // Get the descriptor. - VariableDesc *VD = DV->getDesc(); - - // Translate tag to proper Dwarf tag. The result variable is dropped for - // now. - unsigned Tag; - switch (VD->getTag()) { - case DW_TAG_return_variable: return NULL; - case DW_TAG_arg_variable: Tag = DW_TAG_formal_parameter; break; - case DW_TAG_auto_variable: // fall thru - default: Tag = DW_TAG_variable; break; - } - - // Define variable debug information entry. - DIE *VariableDie = new DIE(Tag); - AddString(VariableDie, DW_AT_name, DW_FORM_string, VD->getName()); - - // Add source line info if available. - AddSourceLine(VariableDie, VD->getFile(), VD->getLine()); - - // Add variable type. - AddType(VariableDie, VD->getType(), Unit); - - // Add variable address. - MachineLocation Location; - Location.set(RI->getFrameRegister(*MF), - RI->getFrameIndexOffset(*MF, DV->getFrameIndex())); - AddAddress(VariableDie, DW_AT_location, Location); - - return VariableDie; - } - - /// ConstructScope - Construct the components of a scope. - /// - void ConstructScope(DebugScope *ParentScope, - unsigned ParentStartID, unsigned ParentEndID, - DIE *ParentDie, CompileUnit *Unit) { - // Add variables to scope. - std::vector<DebugVariable *> &Variables = ParentScope->getVariables(); - for (unsigned i = 0, N = Variables.size(); i < N; ++i) { - DIE *VariableDie = NewScopeVariable(Variables[i], Unit); - if (VariableDie) ParentDie->AddChild(VariableDie); - } - - // Add nested scopes. - std::vector<DebugScope *> &Scopes = ParentScope->getScopes(); - for (unsigned j = 0, M = Scopes.size(); j < M; ++j) { - // Define the Scope debug information entry. - DebugScope *Scope = Scopes[j]; - // FIXME - Ignore inlined functions for the time being. - if (!Scope->getParent()) continue; - - unsigned StartID = MMI->MappedLabel(Scope->getStartLabelID()); - unsigned EndID = MMI->MappedLabel(Scope->getEndLabelID()); - - // Ignore empty scopes. - if (StartID == EndID && StartID != 0) continue; - if (Scope->getScopes().empty() && Scope->getVariables().empty()) continue; - - if (StartID == ParentStartID && EndID == ParentEndID) { - // Just add stuff to the parent scope. - ConstructScope(Scope, ParentStartID, ParentEndID, ParentDie, Unit); - } else { - DIE *ScopeDie = new DIE(DW_TAG_lexical_block); - - // Add the scope bounds. - if (StartID) { - AddLabel(ScopeDie, DW_AT_low_pc, DW_FORM_addr, - DWLabel("label", StartID)); - } else { - AddLabel(ScopeDie, DW_AT_low_pc, DW_FORM_addr, - DWLabel("func_begin", SubprogramCount)); - } - if (EndID) { - AddLabel(ScopeDie, DW_AT_high_pc, DW_FORM_addr, - DWLabel("label", EndID)); - } else { - AddLabel(ScopeDie, DW_AT_high_pc, DW_FORM_addr, - DWLabel("func_end", SubprogramCount)); - } - - // Add the scope contents. - ConstructScope(Scope, StartID, EndID, ScopeDie, Unit); - ParentDie->AddChild(ScopeDie); - } - } - } - - /// ConstructRootScope - Construct the scope for the subprogram. - /// - void ConstructRootScope(DebugScope *RootScope) { - // Exit if there is no root scope. - if (!RootScope) return; - - // Get the subprogram debug information entry. - SubprogramDesc *SPD = cast<SubprogramDesc>(RootScope->getDesc()); - - // Get the compile unit context. - CompileUnit *Unit = GetBaseCompileUnit(); - - // Get the subprogram die. - DIE *SPDie = Unit->getDieMapSlotFor(SPD); - assert(SPDie && "Missing subprogram descriptor"); - - // Add the function bounds. - AddLabel(SPDie, DW_AT_low_pc, DW_FORM_addr, - DWLabel("func_begin", SubprogramCount)); - AddLabel(SPDie, DW_AT_high_pc, DW_FORM_addr, - DWLabel("func_end", SubprogramCount)); - MachineLocation Location(RI->getFrameRegister(*MF)); - AddAddress(SPDie, DW_AT_frame_base, Location); - - ConstructScope(RootScope, 0, 0, SPDie, Unit); - } - - /// EmitInitial - Emit initial Dwarf declarations. This is necessary for cc - /// tools to recognize the object file contains Dwarf information. - void EmitInitial() { - // Check to see if we already emitted intial headers. - if (didInitial) return; - didInitial = true; - - // Dwarf sections base addresses. - if (TAI->doesDwarfRequireFrameSection()) { - Asm->SwitchToDataSection(TAI->getDwarfFrameSection()); - EmitLabel("section_debug_frame", 0); - } - Asm->SwitchToDataSection(TAI->getDwarfInfoSection()); - EmitLabel("section_info", 0); - Asm->SwitchToDataSection(TAI->getDwarfAbbrevSection()); - EmitLabel("section_abbrev", 0); - Asm->SwitchToDataSection(TAI->getDwarfARangesSection()); - EmitLabel("section_aranges", 0); - Asm->SwitchToDataSection(TAI->getDwarfMacInfoSection()); - EmitLabel("section_macinfo", 0); - Asm->SwitchToDataSection(TAI->getDwarfLineSection()); - EmitLabel("section_line", 0); - Asm->SwitchToDataSection(TAI->getDwarfLocSection()); - EmitLabel("section_loc", 0); - Asm->SwitchToDataSection(TAI->getDwarfPubNamesSection()); - EmitLabel("section_pubnames", 0); - Asm->SwitchToDataSection(TAI->getDwarfStrSection()); - EmitLabel("section_str", 0); - Asm->SwitchToDataSection(TAI->getDwarfRangesSection()); - EmitLabel("section_ranges", 0); - - Asm->SwitchToTextSection(TAI->getTextSection()); - EmitLabel("text_begin", 0); - Asm->SwitchToDataSection(TAI->getDataSection()); - EmitLabel("data_begin", 0); - } - - /// EmitDIE - Recusively Emits a debug information entry. - /// - void EmitDIE(DIE *Die) { - // Get the abbreviation for this DIE. - unsigned AbbrevNumber = Die->getAbbrevNumber(); - const DIEAbbrev *Abbrev = Abbreviations[AbbrevNumber - 1]; - - Asm->EOL(); - - // Emit the code (index) for the abbreviation. - Asm->EmitULEB128Bytes(AbbrevNumber); - - if (VerboseAsm) - Asm->EOL(std::string("Abbrev [" + - utostr(AbbrevNumber) + - "] 0x" + utohexstr(Die->getOffset()) + - ":0x" + utohexstr(Die->getSize()) + " " + - TagString(Abbrev->getTag()))); - else - Asm->EOL(); - - SmallVector<DIEValue*, 32> &Values = Die->getValues(); - const SmallVector<DIEAbbrevData, 8> &AbbrevData = Abbrev->getData(); - - // Emit the DIE attribute values. - for (unsigned i = 0, N = Values.size(); i < N; ++i) { - unsigned Attr = AbbrevData[i].getAttribute(); - unsigned Form = AbbrevData[i].getForm(); - assert(Form && "Too many attributes for DIE (check abbreviation)"); - - switch (Attr) { - case DW_AT_sibling: { - Asm->EmitInt32(Die->SiblingOffset()); - break; - } - default: { - // Emit an attribute using the defined form. - Values[i]->EmitValue(*this, Form); - break; - } - } - - Asm->EOL(AttributeString(Attr)); - } - - // Emit the DIE children if any. - if (Abbrev->getChildrenFlag() == DW_CHILDREN_yes) { - const std::vector<DIE *> &Children = Die->getChildren(); - - for (unsigned j = 0, M = Children.size(); j < M; ++j) { - EmitDIE(Children[j]); - } - - Asm->EmitInt8(0); Asm->EOL("End Of Children Mark"); - } - } - - /// SizeAndOffsetDie - Compute the size and offset of a DIE. - /// - unsigned SizeAndOffsetDie(DIE *Die, unsigned Offset, bool Last) { - // Get the children. - const std::vector<DIE *> &Children = Die->getChildren(); - - // If not last sibling and has children then add sibling offset attribute. - if (!Last && !Children.empty()) Die->AddSiblingOffset(); - - // Record the abbreviation. - AssignAbbrevNumber(Die->getAbbrev()); - - // Get the abbreviation for this DIE. - unsigned AbbrevNumber = Die->getAbbrevNumber(); - const DIEAbbrev *Abbrev = Abbreviations[AbbrevNumber - 1]; - - // Set DIE offset - Die->setOffset(Offset); - - // Start the size with the size of abbreviation code. - Offset += TargetAsmInfo::getULEB128Size(AbbrevNumber); - - const SmallVector<DIEValue*, 32> &Values = Die->getValues(); - const SmallVector<DIEAbbrevData, 8> &AbbrevData = Abbrev->getData(); - - // Size the DIE attribute values. - for (unsigned i = 0, N = Values.size(); i < N; ++i) { - // Size attribute value. - Offset += Values[i]->SizeOf(*this, AbbrevData[i].getForm()); - } - - // Size the DIE children if any. - if (!Children.empty()) { - assert(Abbrev->getChildrenFlag() == DW_CHILDREN_yes && - "Children flag not set"); - - for (unsigned j = 0, M = Children.size(); j < M; ++j) { - Offset = SizeAndOffsetDie(Children[j], Offset, (j + 1) == M); - } - - // End of children marker. - Offset += sizeof(int8_t); - } - - Die->setSize(Offset - Die->getOffset()); - return Offset; - } - - /// SizeAndOffsets - Compute the size and offset of all the DIEs. - /// - void SizeAndOffsets() { - // Process base compile unit. - CompileUnit *Unit = GetBaseCompileUnit(); - // Compute size of compile unit header - 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) - SizeAndOffsetDie(Unit->getDie(), Offset, true); - } - - /// EmitDebugInfo - Emit the debug info section. - /// - void EmitDebugInfo() { - // Start debug info section. - Asm->SwitchToDataSection(TAI->getDwarfInfoSection()); - - CompileUnit *Unit = GetBaseCompileUnit(); - DIE *Die = Unit->getDie(); - // Emit the compile units header. - EmitLabel("info_begin", Unit->getID()); - // Emit size of content not including length itself - unsigned ContentSize = Die->getSize() + - sizeof(int16_t) + // DWARF version number - sizeof(int32_t) + // Offset Into Abbrev. Section - sizeof(int8_t) + // Pointer Size (in bytes) - sizeof(int32_t); // FIXME - extra pad for gdb bug. - - Asm->EmitInt32(ContentSize); Asm->EOL("Length of Compilation Unit Info"); - Asm->EmitInt16(DWARF_VERSION); Asm->EOL("DWARF version number"); - EmitSectionOffset("abbrev_begin", "section_abbrev", 0, 0, true, false); - Asm->EOL("Offset Into Abbrev. Section"); - Asm->EmitInt8(TD->getPointerSize()); Asm->EOL("Address Size (in bytes)"); - - EmitDIE(Die); - // FIXME - extra padding for gdb bug. - Asm->EmitInt8(0); Asm->EOL("Extra Pad For GDB"); - Asm->EmitInt8(0); Asm->EOL("Extra Pad For GDB"); - Asm->EmitInt8(0); Asm->EOL("Extra Pad For GDB"); - Asm->EmitInt8(0); Asm->EOL("Extra Pad For GDB"); - EmitLabel("info_end", Unit->getID()); - - Asm->EOL(); - } - - /// EmitAbbreviations - Emit the abbreviation section. - /// - void EmitAbbreviations() const { - // Check to see if it is worth the effort. - if (!Abbreviations.empty()) { - // Start the debug abbrev section. - Asm->SwitchToDataSection(TAI->getDwarfAbbrevSection()); - - EmitLabel("abbrev_begin", 0); - - // For each abbrevation. - for (unsigned i = 0, N = Abbreviations.size(); i < N; ++i) { - // Get abbreviation data - const DIEAbbrev *Abbrev = Abbreviations[i]; - - // Emit the abbrevations code (base 1 index.) - Asm->EmitULEB128Bytes(Abbrev->getNumber()); - Asm->EOL("Abbreviation Code"); - - // Emit the abbreviations data. - Abbrev->Emit(*this); - - Asm->EOL(); - } - - // Mark end of abbreviations. - Asm->EmitULEB128Bytes(0); Asm->EOL("EOM(3)"); - - EmitLabel("abbrev_end", 0); - - Asm->EOL(); - } - } - - /// EmitEndOfLineMatrix - Emit the last address of the section and the end of - /// the line matrix. - /// - void EmitEndOfLineMatrix(unsigned SectionEnd) { - // Define last address of section. - Asm->EmitInt8(0); Asm->EOL("Extended Op"); - Asm->EmitInt8(TD->getPointerSize() + 1); Asm->EOL("Op size"); - Asm->EmitInt8(DW_LNE_set_address); Asm->EOL("DW_LNE_set_address"); - EmitReference("section_end", SectionEnd); Asm->EOL("Section end label"); - - // Mark end of matrix. - Asm->EmitInt8(0); Asm->EOL("DW_LNE_end_sequence"); - Asm->EmitULEB128Bytes(1); Asm->EOL(); - Asm->EmitInt8(1); Asm->EOL(); - } - - /// EmitDebugLines - Emit source line information. - /// - void EmitDebugLines() { - // If the target is using .loc/.file, the assembler will be emitting the - // .debug_line table automatically. - if (TAI->hasDotLocAndDotFile()) - return; - - // Minimum line delta, thus ranging from -10..(255-10). - const int MinLineDelta = -(DW_LNS_fixed_advance_pc + 1); - // Maximum line delta, thus ranging from -10..(255-10). - const int MaxLineDelta = 255 + MinLineDelta; - - // Start the dwarf line section. - Asm->SwitchToDataSection(TAI->getDwarfLineSection()); - - // Construct the section header. - - EmitDifference("line_end", 0, "line_begin", 0, true); - Asm->EOL("Length of Source Line Info"); - EmitLabel("line_begin", 0); - - Asm->EmitInt16(DWARF_VERSION); Asm->EOL("DWARF version number"); - - EmitDifference("line_prolog_end", 0, "line_prolog_begin", 0, true); - Asm->EOL("Prolog Length"); - EmitLabel("line_prolog_begin", 0); - - Asm->EmitInt8(1); Asm->EOL("Minimum Instruction Length"); - - Asm->EmitInt8(1); Asm->EOL("Default is_stmt_start flag"); - - Asm->EmitInt8(MinLineDelta); Asm->EOL("Line Base Value (Special Opcodes)"); - - Asm->EmitInt8(MaxLineDelta); Asm->EOL("Line Range Value (Special Opcodes)"); - - Asm->EmitInt8(-MinLineDelta); Asm->EOL("Special Opcode Base"); - - // Line number standard opcode encodings argument count - Asm->EmitInt8(0); Asm->EOL("DW_LNS_copy arg count"); - Asm->EmitInt8(1); Asm->EOL("DW_LNS_advance_pc arg count"); - Asm->EmitInt8(1); Asm->EOL("DW_LNS_advance_line arg count"); - Asm->EmitInt8(1); Asm->EOL("DW_LNS_set_file arg count"); - Asm->EmitInt8(1); Asm->EOL("DW_LNS_set_column arg count"); - Asm->EmitInt8(0); Asm->EOL("DW_LNS_negate_stmt arg count"); - Asm->EmitInt8(0); Asm->EOL("DW_LNS_set_basic_block arg count"); - Asm->EmitInt8(0); Asm->EOL("DW_LNS_const_add_pc arg count"); - Asm->EmitInt8(1); Asm->EOL("DW_LNS_fixed_advance_pc arg count"); - - const UniqueVector<std::string> &Directories = MMI->getDirectories(); - const UniqueVector<SourceFileInfo> &SourceFiles = MMI->getSourceFiles(); - - // Emit directories. - for (unsigned DirectoryID = 1, NDID = Directories.size(); - DirectoryID <= NDID; ++DirectoryID) { - Asm->EmitString(Directories[DirectoryID]); Asm->EOL("Directory"); - } - Asm->EmitInt8(0); Asm->EOL("End of directories"); - - // Emit files. - for (unsigned SourceID = 1, NSID = SourceFiles.size(); - SourceID <= NSID; ++SourceID) { - const SourceFileInfo &SourceFile = SourceFiles[SourceID]; - Asm->EmitString(SourceFile.getName()); - Asm->EOL("Source"); - Asm->EmitULEB128Bytes(SourceFile.getDirectoryID()); - Asm->EOL("Directory #"); - Asm->EmitULEB128Bytes(0); - Asm->EOL("Mod date"); - Asm->EmitULEB128Bytes(0); - Asm->EOL("File size"); - } - Asm->EmitInt8(0); Asm->EOL("End of files"); - - EmitLabel("line_prolog_end", 0); - - // A sequence for each text section. - unsigned SecSrcLinesSize = SectionSourceLines.size(); - - for (unsigned j = 0; j < SecSrcLinesSize; ++j) { - // Isolate current sections line info. - const std::vector<SourceLineInfo> &LineInfos = SectionSourceLines[j]; - - if (VerboseAsm) - Asm->EOL(std::string("Section ") + SectionMap[j + 1]); - else - Asm->EOL(); - - // Dwarf assumes we start with first line of first source file. - unsigned Source = 1; - unsigned Line = 1; - - // Construct rows of the address, source, line, column matrix. - for (unsigned i = 0, N = LineInfos.size(); i < N; ++i) { - const SourceLineInfo &LineInfo = LineInfos[i]; - unsigned LabelID = MMI->MappedLabel(LineInfo.getLabelID()); - if (!LabelID) continue; - - unsigned SourceID = LineInfo.getSourceID(); - const SourceFileInfo &SourceFile = SourceFiles[SourceID]; - unsigned DirectoryID = SourceFile.getDirectoryID(); - if (VerboseAsm) - Asm->EOL(Directories[DirectoryID] - + SourceFile.getName() - + ":" - + utostr_32(LineInfo.getLine())); - else - Asm->EOL(); - - // Define the line address. - Asm->EmitInt8(0); Asm->EOL("Extended Op"); - Asm->EmitInt8(TD->getPointerSize() + 1); Asm->EOL("Op size"); - Asm->EmitInt8(DW_LNE_set_address); Asm->EOL("DW_LNE_set_address"); - EmitReference("label", LabelID); Asm->EOL("Location label"); - - // If change of source, then switch to the new source. - if (Source != LineInfo.getSourceID()) { - Source = LineInfo.getSourceID(); - Asm->EmitInt8(DW_LNS_set_file); Asm->EOL("DW_LNS_set_file"); - Asm->EmitULEB128Bytes(Source); Asm->EOL("New Source"); - } - - // If change of line. - if (Line != LineInfo.getLine()) { - // Determine offset. - int Offset = LineInfo.getLine() - Line; - int Delta = Offset - MinLineDelta; - - // Update line. - Line = LineInfo.getLine(); - - // If delta is small enough and in range... - if (Delta >= 0 && Delta < (MaxLineDelta - 1)) { - // ... then use fast opcode. - Asm->EmitInt8(Delta - MinLineDelta); Asm->EOL("Line Delta"); - } else { - // ... otherwise use long hand. - Asm->EmitInt8(DW_LNS_advance_line); Asm->EOL("DW_LNS_advance_line"); - Asm->EmitSLEB128Bytes(Offset); Asm->EOL("Line Offset"); - Asm->EmitInt8(DW_LNS_copy); Asm->EOL("DW_LNS_copy"); - } - } else { - // Copy the previous row (different address or source) - Asm->EmitInt8(DW_LNS_copy); Asm->EOL("DW_LNS_copy"); - } - } - - EmitEndOfLineMatrix(j + 1); - } - - if (SecSrcLinesSize == 0) - // Because we're emitting a debug_line section, we still need a line - // table. The linker and friends expect it to exist. If there's nothing to - // put into it, emit an empty table. - EmitEndOfLineMatrix(1); - - EmitLabel("line_end", 0); - - Asm->EOL(); - } - - /// EmitCommonDebugFrame - Emit common frame info into a debug frame section. - /// - void EmitCommonDebugFrame() { - if (!TAI->doesDwarfRequireFrameSection()) - return; - - int stackGrowth = - Asm->TM.getFrameInfo()->getStackGrowthDirection() == - TargetFrameInfo::StackGrowsUp ? - TD->getPointerSize() : -TD->getPointerSize(); - - // Start the dwarf frame section. - Asm->SwitchToDataSection(TAI->getDwarfFrameSection()); - - EmitLabel("debug_frame_common", 0); - EmitDifference("debug_frame_common_end", 0, - "debug_frame_common_begin", 0, true); - Asm->EOL("Length of Common Information Entry"); - - EmitLabel("debug_frame_common_begin", 0); - Asm->EmitInt32((int)DW_CIE_ID); - Asm->EOL("CIE Identifier Tag"); - Asm->EmitInt8(DW_CIE_VERSION); - Asm->EOL("CIE Version"); - Asm->EmitString(""); - Asm->EOL("CIE Augmentation"); - Asm->EmitULEB128Bytes(1); - Asm->EOL("CIE Code Alignment Factor"); - Asm->EmitSLEB128Bytes(stackGrowth); - Asm->EOL("CIE Data Alignment Factor"); - Asm->EmitInt8(RI->getDwarfRegNum(RI->getRARegister(), false)); - Asm->EOL("CIE RA Column"); - - std::vector<MachineMove> Moves; - RI->getInitialFrameState(Moves); - - EmitFrameMoves(NULL, 0, Moves, false); - - Asm->EmitAlignment(2, 0, 0, false); - EmitLabel("debug_frame_common_end", 0); - - Asm->EOL(); - } - - /// EmitFunctionDebugFrame - Emit per function frame info into a debug frame - /// section. - void EmitFunctionDebugFrame(const FunctionDebugFrameInfo &DebugFrameInfo) { - if (!TAI->doesDwarfRequireFrameSection()) - return; - - // Start the dwarf frame section. - Asm->SwitchToDataSection(TAI->getDwarfFrameSection()); - - EmitDifference("debug_frame_end", DebugFrameInfo.Number, - "debug_frame_begin", DebugFrameInfo.Number, true); - Asm->EOL("Length of Frame Information Entry"); - - EmitLabel("debug_frame_begin", DebugFrameInfo.Number); - - EmitSectionOffset("debug_frame_common", "section_debug_frame", - 0, 0, true, false); - Asm->EOL("FDE CIE offset"); - - EmitReference("func_begin", DebugFrameInfo.Number); - Asm->EOL("FDE initial location"); - EmitDifference("func_end", DebugFrameInfo.Number, - "func_begin", DebugFrameInfo.Number); - Asm->EOL("FDE address range"); - - EmitFrameMoves("func_begin", DebugFrameInfo.Number, DebugFrameInfo.Moves, false); - - Asm->EmitAlignment(2, 0, 0, false); - EmitLabel("debug_frame_end", DebugFrameInfo.Number); - - Asm->EOL(); - } - - /// EmitDebugPubNames - Emit visible names into a debug pubnames section. - /// - void EmitDebugPubNames() { - // Start the dwarf pubnames section. - Asm->SwitchToDataSection(TAI->getDwarfPubNamesSection()); - - CompileUnit *Unit = GetBaseCompileUnit(); - - EmitDifference("pubnames_end", Unit->getID(), - "pubnames_begin", Unit->getID(), true); - Asm->EOL("Length of Public Names Info"); - - EmitLabel("pubnames_begin", Unit->getID()); - - Asm->EmitInt16(DWARF_VERSION); Asm->EOL("DWARF Version"); - - EmitSectionOffset("info_begin", "section_info", - Unit->getID(), 0, true, false); - Asm->EOL("Offset of Compilation Unit Info"); - - EmitDifference("info_end", Unit->getID(), "info_begin", Unit->getID(),true); - Asm->EOL("Compilation Unit Length"); - - std::map<std::string, DIE *> &Globals = Unit->getGlobals(); - - for (std::map<std::string, DIE *>::iterator GI = Globals.begin(), - GE = Globals.end(); - GI != GE; ++GI) { - const std::string &Name = GI->first; - DIE * Entity = GI->second; - - Asm->EmitInt32(Entity->getOffset()); Asm->EOL("DIE offset"); - Asm->EmitString(Name); Asm->EOL("External Name"); - } - - Asm->EmitInt32(0); Asm->EOL("End Mark"); - EmitLabel("pubnames_end", Unit->getID()); - - Asm->EOL(); - } - - /// EmitDebugStr - Emit visible names into a debug str section. - /// - void EmitDebugStr() { - // Check to see if it is worth the effort. - if (!StringPool.empty()) { - // Start the dwarf str section. - Asm->SwitchToDataSection(TAI->getDwarfStrSection()); - - // For each of strings in the string pool. - for (unsigned StringID = 1, N = StringPool.size(); - StringID <= N; ++StringID) { - // Emit a label for reference from debug information entries. - EmitLabel("string", StringID); - // Emit the string itself. - const std::string &String = StringPool[StringID]; - Asm->EmitString(String); Asm->EOL(); - } - - Asm->EOL(); - } - } - - /// EmitDebugLoc - Emit visible names into a debug loc section. - /// - void EmitDebugLoc() { - // Start the dwarf loc section. - Asm->SwitchToDataSection(TAI->getDwarfLocSection()); - - Asm->EOL(); - } - - /// EmitDebugARanges - Emit visible names into a debug aranges section. - /// - void EmitDebugARanges() { - // Start the dwarf aranges section. - Asm->SwitchToDataSection(TAI->getDwarfARangesSection()); - - // FIXME - Mock up - #if 0 - CompileUnit *Unit = GetBaseCompileUnit(); - - // Don't include size of length - Asm->EmitInt32(0x1c); Asm->EOL("Length of Address Ranges Info"); - - Asm->EmitInt16(DWARF_VERSION); Asm->EOL("Dwarf Version"); - - EmitReference("info_begin", Unit->getID()); - Asm->EOL("Offset of Compilation Unit Info"); - - Asm->EmitInt8(TD->getPointerSize()); Asm->EOL("Size of Address"); - - Asm->EmitInt8(0); Asm->EOL("Size of Segment Descriptor"); - - Asm->EmitInt16(0); Asm->EOL("Pad (1)"); - Asm->EmitInt16(0); Asm->EOL("Pad (2)"); - - // Range 1 - EmitReference("text_begin", 0); Asm->EOL("Address"); - EmitDifference("text_end", 0, "text_begin", 0, true); Asm->EOL("Length"); - - Asm->EmitInt32(0); Asm->EOL("EOM (1)"); - Asm->EmitInt32(0); Asm->EOL("EOM (2)"); - #endif - - Asm->EOL(); - } - - /// EmitDebugRanges - Emit visible names into a debug ranges section. - /// - void EmitDebugRanges() { - // Start the dwarf ranges section. - Asm->SwitchToDataSection(TAI->getDwarfRangesSection()); - - Asm->EOL(); - } - - /// EmitDebugMacInfo - Emit visible names into a debug macinfo section. - /// - void EmitDebugMacInfo() { - // Start the dwarf macinfo section. - Asm->SwitchToDataSection(TAI->getDwarfMacInfoSection()); - - Asm->EOL(); - } - - /// ConstructCompileUnitDIEs - Create a compile unit DIE for each source and - /// header file. - void ConstructCompileUnitDIEs() { - const UniqueVector<CompileUnitDesc *> CUW = MMI->getCompileUnits(); - - for (unsigned i = 1, N = CUW.size(); i <= N; ++i) { - unsigned ID = MMI->RecordSource(CUW[i]); - CompileUnit *Unit = NewCompileUnit(CUW[i], ID); - CompileUnits.push_back(Unit); - } - } - - /// ConstructGlobalDIEs - Create DIEs for each of the externally visible - /// global variables. - void ConstructGlobalDIEs() { - std::vector<GlobalVariableDesc *> GlobalVariables; - MMI->getAnchoredDescriptors<GlobalVariableDesc>(*M, GlobalVariables); - - for (unsigned i = 0, N = GlobalVariables.size(); i < N; ++i) { - GlobalVariableDesc *GVD = GlobalVariables[i]; - NewGlobalVariable(GVD); - } - } - - /// ConstructSubprogramDIEs - Create DIEs for each of the externally visible - /// subprograms. - void ConstructSubprogramDIEs() { - std::vector<SubprogramDesc *> Subprograms; - MMI->getAnchoredDescriptors<SubprogramDesc>(*M, Subprograms); - - for (unsigned i = 0, N = Subprograms.size(); i < N; ++i) { - SubprogramDesc *SPD = Subprograms[i]; - NewSubprogram(SPD); - } - } - -public: - //===--------------------------------------------------------------------===// - // Main entry points. - // - DwarfDebug(std::ostream &OS, AsmPrinter *A, const TargetAsmInfo *T) - : Dwarf(OS, A, T, "dbg") - , CompileUnits() - , AbbreviationsSet(InitAbbreviationsSetSize) - , Abbreviations() - , ValuesSet(InitValuesSetSize) - , Values() - , StringPool() - , DescToUnitMap() - , SectionMap() - , SectionSourceLines() - , didInitial(false) - , shouldEmit(false) - { - } - virtual ~DwarfDebug() { - for (unsigned i = 0, N = CompileUnits.size(); i < N; ++i) - delete CompileUnits[i]; - for (unsigned j = 0, M = Values.size(); j < M; ++j) - delete Values[j]; - } - - /// SetModuleInfo - Set machine module information when it's known that pass - /// manager has created it. Set by the target AsmPrinter. - void SetModuleInfo(MachineModuleInfo *mmi) { - // Make sure initial declarations are made. - if (!MMI && mmi->hasDebugInfo()) { - MMI = mmi; - shouldEmit = true; - - // Create all the compile unit DIEs. - ConstructCompileUnitDIEs(); - - // Create DIEs for each of the externally visible global variables. - ConstructGlobalDIEs(); - - // Create DIEs for each of the externally visible subprograms. - ConstructSubprogramDIEs(); - - // Prime section data. - SectionMap.insert(TAI->getTextSection()); - - // Print out .file directives to specify files for .loc directives. These - // are printed out early so that they precede any .loc directives. - if (TAI->hasDotLocAndDotFile()) { - const UniqueVector<SourceFileInfo> &SourceFiles = MMI->getSourceFiles(); - const UniqueVector<std::string> &Directories = MMI->getDirectories(); - for (unsigned i = 1, e = SourceFiles.size(); i <= e; ++i) { - sys::Path FullPath(Directories[SourceFiles[i].getDirectoryID()]); - bool AppendOk = FullPath.appendComponent(SourceFiles[i].getName()); - assert(AppendOk && "Could not append filename to directory!"); - Asm->EmitFile(i, FullPath.toString()); - Asm->EOL(); - } - } - - // Emit initial sections - EmitInitial(); - } - } - - /// BeginModule - Emit all Dwarf sections that should come prior to the - /// content. - void BeginModule(Module *M) { - this->M = M; - } - - /// EndModule - Emit all Dwarf sections that should come after the content. - /// - void EndModule() { - if (!ShouldEmitDwarf()) return; - - // Standard sections final addresses. - Asm->SwitchToTextSection(TAI->getTextSection()); - EmitLabel("text_end", 0); - Asm->SwitchToDataSection(TAI->getDataSection()); - EmitLabel("data_end", 0); - - // End text sections. - for (unsigned i = 1, N = SectionMap.size(); i <= N; ++i) { - Asm->SwitchToTextSection(SectionMap[i].c_str()); - EmitLabel("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. - SizeAndOffsets(); - - // Emit all the DIEs into a debug info section - EmitDebugInfo(); - - // Corresponding abbreviations into a abbrev section. - EmitAbbreviations(); - - // Emit source line correspondence into a debug line section. - EmitDebugLines(); - - // Emit info into a debug pubnames section. - EmitDebugPubNames(); - - // Emit info into a debug str section. - EmitDebugStr(); - - // Emit info into a debug loc section. - EmitDebugLoc(); - - // Emit info into a debug aranges section. - EmitDebugARanges(); - - // Emit info into a debug ranges section. - EmitDebugRanges(); - - // Emit info into a debug macinfo section. - EmitDebugMacInfo(); - } - - /// BeginFunction - Gather pre-function debug information. Assumes being - /// emitted immediately after the function entry point. - void BeginFunction(MachineFunction *MF) { - this->MF = MF; - - if (!ShouldEmitDwarf()) return; - - // Begin accumulating function debug information. - MMI->BeginFunction(MF); - - // Assumes in correct section after the entry point. - EmitLabel("func_begin", ++SubprogramCount); - - // Emit label for the implicitly defined dbg.stoppoint at the start of - // the function. - const std::vector<SourceLineInfo> &LineInfos = MMI->getSourceLines(); - if (!LineInfos.empty()) { - const SourceLineInfo &LineInfo = LineInfos[0]; - Asm->printLabel(LineInfo.getLabelID()); - } - } - - /// EndFunction - Gather and emit post-function debug information. - /// - void EndFunction() { - if (!ShouldEmitDwarf()) return; - - // Define end label for subprogram. - EmitLabel("func_end", SubprogramCount); - - // Get function line info. - const std::vector<SourceLineInfo> &LineInfos = MMI->getSourceLines(); - - if (!LineInfos.empty()) { - // Get section line info. - unsigned ID = SectionMap.insert(Asm->CurrentSection); - if (SectionSourceLines.size() < ID) SectionSourceLines.resize(ID); - std::vector<SourceLineInfo> &SectionLineInfos = SectionSourceLines[ID-1]; - // Append the function info to section info. - SectionLineInfos.insert(SectionLineInfos.end(), - LineInfos.begin(), LineInfos.end()); - } - - // Construct scopes for subprogram. - ConstructRootScope(MMI->getRootScope()); - - DebugFrames.push_back(FunctionDebugFrameInfo(SubprogramCount, - MMI->getFrameMoves())); - } -}; - -//===----------------------------------------------------------------------===// -/// DwarfException - Emits Dwarf exception handling directives. -/// -class DwarfException : public Dwarf { - -private: - struct FunctionEHFrameInfo { - std::string FnName; - unsigned Number; - unsigned PersonalityIndex; - bool hasCalls; - bool hasLandingPads; - std::vector<MachineMove> Moves; - const Function * function; - - FunctionEHFrameInfo(const std::string &FN, unsigned Num, unsigned P, - bool hC, bool hL, - const std::vector<MachineMove> &M, - const Function *f): - FnName(FN), Number(Num), PersonalityIndex(P), - hasCalls(hC), hasLandingPads(hL), Moves(M), function (f) { } - }; - - std::vector<FunctionEHFrameInfo> EHFrames; - - /// shouldEmitTable - Per-function flag to indicate if EH tables should - /// be emitted. - bool shouldEmitTable; - - /// 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; - - /// shouldEmitFrameModule - Per-module flag to indicate if frame moves - /// should be emitted. - bool shouldEmitMovesModule; - - /// EmitCommonEHFrame - Emit the common eh unwind frame. - /// - void EmitCommonEHFrame(const Function *Personality, unsigned Index) { - // Size and sign of stack growth. - int stackGrowth = - Asm->TM.getFrameInfo()->getStackGrowthDirection() == - TargetFrameInfo::StackGrowsUp ? - TD->getPointerSize() : -TD->getPointerSize(); - - // Begin eh frame section. - Asm->SwitchToTextSection(TAI->getDwarfEHFrameSection()); - O << "EH_frame" << Index << ":\n"; - EmitLabel("section_eh_frame", Index); - - // Define base labels. - EmitLabel("eh_frame_common", Index); - - // Define the eh frame length. - EmitDifference("eh_frame_common_end", Index, - "eh_frame_common_begin", Index, true); - Asm->EOL("Length of Common Information Entry"); - - // EH frame header. - EmitLabel("eh_frame_common_begin", Index); - Asm->EmitInt32((int)0); - Asm->EOL("CIE Identifier Tag"); - Asm->EmitInt8(DW_CIE_VERSION); - Asm->EOL("CIE Version"); - - // The personality presence indicates that language specific information - // will show up in the eh frame. - Asm->EmitString(Personality ? "zPLR" : "zR"); - Asm->EOL("CIE Augmentation"); - - // Round out reader. - Asm->EmitULEB128Bytes(1); - Asm->EOL("CIE Code Alignment Factor"); - Asm->EmitSLEB128Bytes(stackGrowth); - Asm->EOL("CIE Data Alignment Factor"); - Asm->EmitInt8(RI->getDwarfRegNum(RI->getRARegister(), true)); - Asm->EOL("CIE Return Address Column"); - - // If there is a personality, we need to indicate the functions location. - if (Personality) { - Asm->EmitULEB128Bytes(7); - Asm->EOL("Augmentation Size"); - - if (TAI->getNeedsIndirectEncoding()) { - Asm->EmitInt8(DW_EH_PE_pcrel | DW_EH_PE_sdata4 | DW_EH_PE_indirect); - Asm->EOL("Personality (pcrel sdata4 indirect)"); - } else { - Asm->EmitInt8(DW_EH_PE_pcrel | DW_EH_PE_sdata4); - Asm->EOL("Personality (pcrel sdata4)"); - } - - PrintRelDirective(true); - O << TAI->getPersonalityPrefix(); - Asm->EmitExternalGlobal((const GlobalVariable *)(Personality)); - O << TAI->getPersonalitySuffix(); - if (strcmp(TAI->getPersonalitySuffix(), "+4@GOTPCREL")) - O << "-" << TAI->getPCSymbol(); - Asm->EOL("Personality"); - - Asm->EmitInt8(DW_EH_PE_pcrel | DW_EH_PE_sdata4); - Asm->EOL("LSDA Encoding (pcrel sdata4)"); - Asm->EmitInt8(DW_EH_PE_pcrel | DW_EH_PE_sdata4); - Asm->EOL("FDE Encoding (pcrel sdata4)"); - } else { - Asm->EmitULEB128Bytes(1); - Asm->EOL("Augmentation Size"); - Asm->EmitInt8(DW_EH_PE_pcrel | DW_EH_PE_sdata4); - Asm->EOL("FDE Encoding (pcrel sdata4)"); - } - - // Indicate locations of general callee saved registers in frame. - std::vector<MachineMove> Moves; - RI->getInitialFrameState(Moves); - EmitFrameMoves(NULL, 0, Moves, 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(TD->getPointerSize() == sizeof(int32_t) ? 2 : 3, - 0, 0, false); - EmitLabel("eh_frame_common_end", Index); - - Asm->EOL(); - } - - /// EmitEHFrame - Emit function exception frame information. - /// - void EmitEHFrame(const FunctionEHFrameInfo &EHFrameInfo) { - Function::LinkageTypes linkage = EHFrameInfo.function->getLinkage(); - - Asm->SwitchToTextSection(TAI->getDwarfEHFrameSection()); - - // Externally visible entry into the functions eh frame info. - // If the corresponding function is static, this should not be - // externally visible. - if (linkage != Function::InternalLinkage) { - if (const char *GlobalEHDirective = TAI->getGlobalEHDirective()) - O << GlobalEHDirective << EHFrameInfo.FnName << "\n"; - } - - // If corresponding function is weak definition, this should be too. - if ((linkage == Function::WeakLinkage || - linkage == Function::LinkOnceLinkage) && - TAI->getWeakDefDirective()) - O << TAI->getWeakDefDirective() << EHFrameInfo.FnName << "\n"; - - // 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.hasCalls && - !UnwindTablesMandatory && - ((linkage != Function::WeakLinkage && - linkage != Function::LinkOnceLinkage) || - !TAI->getWeakDefDirective() || - TAI->getSupportsWeakOmittedEHFrame())) - { - O << EHFrameInfo.FnName << " = 0\n"; - // 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 (const char *UsedDirective = TAI->getUsedDirective()) - O << UsedDirective << EHFrameInfo.FnName << "\n\n"; - } else { - O << EHFrameInfo.FnName << ":\n"; - - // EH frame header. - EmitDifference("eh_frame_end", EHFrameInfo.Number, - "eh_frame_begin", EHFrameInfo.Number, true); - Asm->EOL("Length of Frame Information Entry"); - - EmitLabel("eh_frame_begin", EHFrameInfo.Number); - - EmitSectionOffset("eh_frame_begin", "eh_frame_common", - EHFrameInfo.Number, EHFrameInfo.PersonalityIndex, - true, true, false); - Asm->EOL("FDE CIE offset"); - - EmitReference("eh_func_begin", EHFrameInfo.Number, true, true); - Asm->EOL("FDE initial location"); - EmitDifference("eh_func_end", EHFrameInfo.Number, - "eh_func_begin", EHFrameInfo.Number, true); - Asm->EOL("FDE address range"); - - // If there is a personality and landing pads then point to the language - // specific data area in the exception table. - if (EHFrameInfo.PersonalityIndex) { - Asm->EmitULEB128Bytes(4); - Asm->EOL("Augmentation size"); - - if (EHFrameInfo.hasLandingPads) - EmitReference("exception", EHFrameInfo.Number, true, true); - else - Asm->EmitInt32((int)0); - Asm->EOL("Language Specific Data Area"); - } else { - Asm->EmitULEB128Bytes(0); - Asm->EOL("Augmentation size"); - } - - // Indicate locations of function specific callee saved registers in - // frame. - EmitFrameMoves("eh_func_begin", EHFrameInfo.Number, EHFrameInfo.Moves, 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(TD->getPointerSize() == sizeof(int32_t) ? 2 : 3, - 0, 0, false); - EmitLabel("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->getUsedFunctions().count(EHFrameInfo.function)) - if (const char *UsedDirective = TAI->getUsedDirective()) - O << UsedDirective << EHFrameInfo.FnName << "\n\n"; - } - } - - /// EmitExceptionTable - Emit landing pads and actions. - /// - /// The general organization of the table is complex, but the basic concepts - /// are easy. First there is a header which describes the location and - /// organization of the three components that follow. - /// 1. The landing pad site information describes the range of code covered - /// by the try. In our case it's an accumulation of the ranges covered - /// by the invokes in the try. There is also a reference to the landing - /// pad that handles the exception once processed. Finally an index into - /// the actions table. - /// 2. The action table, in our case, is composed of pairs of type ids - /// and next action offset. Starting with the action index from the - /// landing pad site, each type Id is checked for a match to the current - /// exception. If it matches then the exception and type id are passed - /// on to the landing pad. Otherwise the next action is looked up. This - /// chain is terminated with a next action of zero. If no type id is - /// found the the frame is unwound and handling continues. - /// 3. Type id table contains references to all the C++ typeinfo for all - /// catches in the function. This tables is reversed indexed base 1. - - /// SharedTypeIds - How many leading type ids two landing pads have in common. - static unsigned SharedTypeIds(const LandingPadInfo *L, - const LandingPadInfo *R) { - const std::vector<int> &LIds = L->TypeIds, &RIds = R->TypeIds; - unsigned LSize = LIds.size(), RSize = RIds.size(); - unsigned MinSize = LSize < RSize ? LSize : RSize; - unsigned Count = 0; - - for (; Count != MinSize; ++Count) - if (LIds[Count] != RIds[Count]) - return Count; - - return Count; - } - - /// PadLT - Order landing pads lexicographically by type id. - static bool PadLT(const LandingPadInfo *L, const LandingPadInfo *R) { - const std::vector<int> &LIds = L->TypeIds, &RIds = R->TypeIds; - unsigned LSize = LIds.size(), RSize = RIds.size(); - unsigned MinSize = LSize < RSize ? LSize : RSize; - - for (unsigned i = 0; i != MinSize; ++i) - if (LIds[i] != RIds[i]) - return LIds[i] < RIds[i]; - - return LSize < RSize; - } - - struct KeyInfo { - static inline unsigned getEmptyKey() { return -1U; } - static inline unsigned getTombstoneKey() { return -2U; } - static unsigned getHashValue(const unsigned &Key) { return Key; } - static bool isEqual(unsigned LHS, unsigned RHS) { return LHS == RHS; } - static bool isPod() { return true; } - }; - - /// ActionEntry - Structure describing an entry in the actions table. - struct ActionEntry { - int ValueForTypeID; // The value to write - may not be equal to the type id. - int NextAction; - struct ActionEntry *Previous; - }; - - /// PadRange - Structure holding a try-range and the associated landing pad. - struct PadRange { - // The index of the landing pad. - unsigned PadIndex; - // The index of the begin and end labels in the landing pad's label lists. - unsigned RangeIndex; - }; - - typedef DenseMap<unsigned, PadRange, KeyInfo> RangeMapType; - - /// CallSiteEntry - Structure describing an entry in the call-site table. - struct CallSiteEntry { - // The 'try-range' is BeginLabel .. EndLabel. - unsigned BeginLabel; // zero indicates the start of the function. - unsigned EndLabel; // zero indicates the end of the function. - // The landing pad starts at PadLabel. - unsigned PadLabel; // zero indicates that there is no landing pad. - unsigned Action; - }; - - void EmitExceptionTable() { - const std::vector<GlobalVariable *> &TypeInfos = MMI->getTypeInfos(); - const std::vector<unsigned> &FilterIds = MMI->getFilterIds(); - const std::vector<LandingPadInfo> &PadInfos = MMI->getLandingPads(); - if (PadInfos.empty()) return; - - // Sort the landing pads in order of their type ids. This is used to fold - // duplicate actions. - SmallVector<const LandingPadInfo *, 64> LandingPads; - LandingPads.reserve(PadInfos.size()); - for (unsigned i = 0, N = PadInfos.size(); i != N; ++i) - LandingPads.push_back(&PadInfos[i]); - std::sort(LandingPads.begin(), LandingPads.end(), PadLT); - - // Negative type ids index into FilterIds, positive type ids index into - // TypeInfos. The value written for a positive type id is just the type - // id itself. For a negative type id, however, the value written is the - // (negative) byte offset of the corresponding FilterIds entry. The byte - // offset is usually equal to the type id, because the FilterIds entries - // are written using a variable width encoding which outputs one byte per - // entry as long as the value written is not too large, but can differ. - // This kind of complication does not occur for positive type ids because - // type infos are output using a fixed width encoding. - // FilterOffsets[i] holds the byte offset corresponding to FilterIds[i]. - SmallVector<int, 16> FilterOffsets; - FilterOffsets.reserve(FilterIds.size()); - int Offset = -1; - for(std::vector<unsigned>::const_iterator I = FilterIds.begin(), - E = FilterIds.end(); I != E; ++I) { - FilterOffsets.push_back(Offset); - Offset -= TargetAsmInfo::getULEB128Size(*I); - } - - // Compute the actions table and gather the first action index for each - // landing pad site. - SmallVector<ActionEntry, 32> Actions; - SmallVector<unsigned, 64> FirstActions; - FirstActions.reserve(LandingPads.size()); - - int FirstAction = 0; - unsigned SizeActions = 0; - for (unsigned i = 0, N = LandingPads.size(); i != N; ++i) { - const LandingPadInfo *LP = LandingPads[i]; - const std::vector<int> &TypeIds = LP->TypeIds; - const unsigned NumShared = i ? SharedTypeIds(LP, LandingPads[i-1]) : 0; - unsigned SizeSiteActions = 0; - - if (NumShared < TypeIds.size()) { - unsigned SizeAction = 0; - ActionEntry *PrevAction = 0; - - if (NumShared) { - const unsigned SizePrevIds = LandingPads[i-1]->TypeIds.size(); - assert(Actions.size()); - PrevAction = &Actions.back(); - SizeAction = TargetAsmInfo::getSLEB128Size(PrevAction->NextAction) + - TargetAsmInfo::getSLEB128Size(PrevAction->ValueForTypeID); - for (unsigned j = NumShared; j != SizePrevIds; ++j) { - SizeAction -= - TargetAsmInfo::getSLEB128Size(PrevAction->ValueForTypeID); - SizeAction += -PrevAction->NextAction; - PrevAction = PrevAction->Previous; - } - } - - // Compute the actions. - for (unsigned I = NumShared, M = TypeIds.size(); I != M; ++I) { - int TypeID = TypeIds[I]; - assert(-1-TypeID < (int)FilterOffsets.size() && "Unknown filter id!"); - int ValueForTypeID = TypeID < 0 ? FilterOffsets[-1 - TypeID] : TypeID; - unsigned SizeTypeID = TargetAsmInfo::getSLEB128Size(ValueForTypeID); - - int NextAction = SizeAction ? -(SizeAction + SizeTypeID) : 0; - SizeAction = SizeTypeID + TargetAsmInfo::getSLEB128Size(NextAction); - SizeSiteActions += SizeAction; - - ActionEntry Action = {ValueForTypeID, NextAction, PrevAction}; - Actions.push_back(Action); - - PrevAction = &Actions.back(); - } - - // Record the first action of the landing pad site. - FirstAction = SizeActions + SizeSiteActions - SizeAction + 1; - } // else identical - re-use previous FirstAction - - FirstActions.push_back(FirstAction); - - // Compute this sites contribution to size. - SizeActions += SizeSiteActions; - } - - // Compute the call-site table. The entry for an invoke has a try-range - // containing the call, a non-zero landing pad and an appropriate action. - // The entry for an ordinary call has a try-range containing the call and - // zero for the landing pad and the action. Calls marked 'nounwind' have - // no entry and must not be contained in the try-range of any entry - they - // form gaps in the table. Entries must be ordered by try-range address. - SmallVector<CallSiteEntry, 64> CallSites; - - RangeMapType PadMap; - // Invokes and nounwind calls have entries in PadMap (due to being bracketed - // by try-range labels when lowered). Ordinary calls do not, so appropriate - // try-ranges for them need be deduced. - for (unsigned i = 0, N = LandingPads.size(); i != N; ++i) { - const LandingPadInfo *LandingPad = LandingPads[i]; - for (unsigned j = 0, E = LandingPad->BeginLabels.size(); j != E; ++j) { - unsigned BeginLabel = LandingPad->BeginLabels[j]; - assert(!PadMap.count(BeginLabel) && "Duplicate landing pad labels!"); - PadRange P = { i, j }; - PadMap[BeginLabel] = P; - } - } - - // The end label of the previous invoke or nounwind try-range. - unsigned LastLabel = 0; - - // Whether there is a potentially throwing instruction (currently this means - // an ordinary call) between the end of the previous try-range and now. - bool SawPotentiallyThrowing = false; - - // Whether the last callsite entry was for an invoke. - bool PreviousIsInvoke = false; - - // Visit all instructions in order of address. - for (MachineFunction::const_iterator I = MF->begin(), E = MF->end(); - I != E; ++I) { - for (MachineBasicBlock::const_iterator MI = I->begin(), E = I->end(); - MI != E; ++MI) { - if (!MI->isLabel()) { - SawPotentiallyThrowing |= MI->getDesc().isCall(); - continue; - } - - unsigned BeginLabel = MI->getOperand(0).getImm(); - assert(BeginLabel && "Invalid label!"); - - // End of the previous try-range? - if (BeginLabel == LastLabel) - SawPotentiallyThrowing = false; - - // Beginning of a new try-range? - RangeMapType::iterator L = PadMap.find(BeginLabel); - if (L == PadMap.end()) - // Nope, it was just some random label. - continue; - - PadRange P = L->second; - const LandingPadInfo *LandingPad = LandingPads[P.PadIndex]; - - assert(BeginLabel == LandingPad->BeginLabels[P.RangeIndex] && - "Inconsistent landing pad map!"); - - // If some instruction between the previous try-range and this one may - // throw, create a call-site entry with no landing pad for the region - // between the try-ranges. - if (SawPotentiallyThrowing) { - CallSiteEntry Site = {LastLabel, BeginLabel, 0, 0}; - CallSites.push_back(Site); - PreviousIsInvoke = false; - } - - LastLabel = LandingPad->EndLabels[P.RangeIndex]; - assert(BeginLabel && LastLabel && "Invalid landing pad!"); - - if (LandingPad->LandingPadLabel) { - // This try-range is for an invoke. - CallSiteEntry Site = {BeginLabel, LastLabel, - LandingPad->LandingPadLabel, FirstActions[P.PadIndex]}; - - // Try to merge with the previous call-site. - if (PreviousIsInvoke) { - CallSiteEntry &Prev = CallSites.back(); - if (Site.PadLabel == Prev.PadLabel && Site.Action == Prev.Action) { - // Extend the range of the previous entry. - Prev.EndLabel = Site.EndLabel; - continue; - } - } - - // Otherwise, create a new call-site. - CallSites.push_back(Site); - PreviousIsInvoke = true; - } else { - // Create a gap. - PreviousIsInvoke = false; - } - } - } - // If some instruction between the previous try-range and the end of the - // function may throw, create a call-site entry with no landing pad for the - // region following the try-range. - if (SawPotentiallyThrowing) { - CallSiteEntry Site = {LastLabel, 0, 0, 0}; - CallSites.push_back(Site); - } - - // Final tallies. - - // Call sites. - const unsigned SiteStartSize = sizeof(int32_t); // DW_EH_PE_udata4 - const unsigned SiteLengthSize = sizeof(int32_t); // DW_EH_PE_udata4 - const unsigned LandingPadSize = sizeof(int32_t); // DW_EH_PE_udata4 - unsigned SizeSites = CallSites.size() * (SiteStartSize + - SiteLengthSize + - LandingPadSize); - for (unsigned i = 0, e = CallSites.size(); i < e; ++i) - SizeSites += TargetAsmInfo::getULEB128Size(CallSites[i].Action); - - // Type infos. - const unsigned TypeInfoSize = TD->getPointerSize(); // DW_EH_PE_absptr - unsigned SizeTypes = TypeInfos.size() * TypeInfoSize; - - unsigned TypeOffset = sizeof(int8_t) + // Call site format - TargetAsmInfo::getULEB128Size(SizeSites) + // Call-site table length - SizeSites + SizeActions + SizeTypes; - - unsigned TotalSize = sizeof(int8_t) + // LPStart format - sizeof(int8_t) + // TType format - TargetAsmInfo::getULEB128Size(TypeOffset) + // TType base offset - TypeOffset; - - unsigned SizeAlign = (4 - TotalSize) & 3; - - // Begin the exception table. - Asm->SwitchToDataSection(TAI->getDwarfExceptionSection()); - O << "GCC_except_table" << SubprogramCount << ":\n"; - Asm->EmitAlignment(2, 0, 0, false); - for (unsigned i = 0; i != SizeAlign; ++i) { - Asm->EmitInt8(0); - Asm->EOL("Padding"); - } - EmitLabel("exception", SubprogramCount); - - // Emit the header. - Asm->EmitInt8(DW_EH_PE_omit); - Asm->EOL("LPStart format (DW_EH_PE_omit)"); - Asm->EmitInt8(DW_EH_PE_absptr); - Asm->EOL("TType format (DW_EH_PE_absptr)"); - Asm->EmitULEB128Bytes(TypeOffset); - Asm->EOL("TType base offset"); - Asm->EmitInt8(DW_EH_PE_udata4); - Asm->EOL("Call site format (DW_EH_PE_udata4)"); - Asm->EmitULEB128Bytes(SizeSites); - Asm->EOL("Call-site table length"); - - // Emit the landing pad site information. - for (unsigned i = 0; i < CallSites.size(); ++i) { - CallSiteEntry &S = CallSites[i]; - const char *BeginTag; - unsigned BeginNumber; - - if (!S.BeginLabel) { - BeginTag = "eh_func_begin"; - BeginNumber = SubprogramCount; - } else { - BeginTag = "label"; - BeginNumber = S.BeginLabel; - } - - EmitSectionOffset(BeginTag, "eh_func_begin", BeginNumber, SubprogramCount, - true, true); - Asm->EOL("Region start"); - - if (!S.EndLabel) { - EmitDifference("eh_func_end", SubprogramCount, BeginTag, BeginNumber, - true); - } else { - EmitDifference("label", S.EndLabel, BeginTag, BeginNumber, true); - } - Asm->EOL("Region length"); - - if (!S.PadLabel) - Asm->EmitInt32(0); - else - EmitSectionOffset("label", "eh_func_begin", S.PadLabel, SubprogramCount, - true, true); - Asm->EOL("Landing pad"); - - Asm->EmitULEB128Bytes(S.Action); - Asm->EOL("Action"); - } - - // Emit the actions. - for (unsigned I = 0, N = Actions.size(); I != N; ++I) { - ActionEntry &Action = Actions[I]; - - Asm->EmitSLEB128Bytes(Action.ValueForTypeID); - Asm->EOL("TypeInfo index"); - Asm->EmitSLEB128Bytes(Action.NextAction); - Asm->EOL("Next action"); - } - - // Emit the type ids. - for (unsigned M = TypeInfos.size(); M; --M) { - GlobalVariable *GV = TypeInfos[M - 1]; - - PrintRelDirective(); - - if (GV) - O << Asm->getGlobalLinkName(GV); - else - O << "0"; - - Asm->EOL("TypeInfo"); - } - - // Emit the filter typeids. - for (unsigned j = 0, M = FilterIds.size(); j < M; ++j) { - unsigned TypeID = FilterIds[j]; - Asm->EmitULEB128Bytes(TypeID); - Asm->EOL("Filter TypeInfo index"); - } - - Asm->EmitAlignment(2, 0, 0, false); - } - -public: - //===--------------------------------------------------------------------===// - // Main entry points. - // - DwarfException(std::ostream &OS, AsmPrinter *A, const TargetAsmInfo *T) - : Dwarf(OS, A, T, "eh") - , shouldEmitTable(false) - , shouldEmitMoves(false) - , shouldEmitTableModule(false) - , shouldEmitMovesModule(false) - {} - - virtual ~DwarfException() {} - - /// SetModuleInfo - Set machine module information when it's known that pass - /// manager has created it. Set by the target AsmPrinter. - void SetModuleInfo(MachineModuleInfo *mmi) { - MMI = mmi; - } - - /// BeginModule - Emit all exception information that should come prior to the - /// content. - void BeginModule(Module *M) { - this->M = M; - } - - /// EndModule - Emit all exception information that should come after the - /// content. - void EndModule() { - if (shouldEmitMovesModule || shouldEmitTableModule) { - const std::vector<Function *> Personalities = MMI->getPersonalities(); - for (unsigned i =0; i < Personalities.size(); ++i) - EmitCommonEHFrame(Personalities[i], i); - - for (std::vector<FunctionEHFrameInfo>::iterator I = EHFrames.begin(), - E = EHFrames.end(); I != E; ++I) - EmitEHFrame(*I); - } - } - - /// BeginFunction - Gather pre-function exception information. Assumes being - /// emitted immediately after the function entry point. - void BeginFunction(MachineFunction *MF) { - this->MF = MF; - shouldEmitTable = shouldEmitMoves = false; - if (MMI && TAI->doesSupportExceptionHandling()) { - - // Map all labels and get rid of any dead landing pads. - MMI->TidyLandingPads(); - // If any landing pads survive, we need an EH table. - if (MMI->getLandingPads().size()) - shouldEmitTable = true; - - // See if we need frame move info. - if (!MF->getFunction()->doesNotThrow() || UnwindTablesMandatory) - shouldEmitMoves = true; - - if (shouldEmitMoves || shouldEmitTable) - // Assumes in correct section after the entry point. - EmitLabel("eh_func_begin", ++SubprogramCount); - } - shouldEmitTableModule |= shouldEmitTable; - shouldEmitMovesModule |= shouldEmitMoves; - } - - /// EndFunction - Gather and emit post-function exception information. - /// - void EndFunction() { - if (shouldEmitMoves || shouldEmitTable) { - EmitLabel("eh_func_end", SubprogramCount); - EmitExceptionTable(); - - // Save EH frame information - EHFrames. - push_back(FunctionEHFrameInfo(getAsm()->getCurrentFunctionEHName(MF), - SubprogramCount, - MMI->getPersonalityIndex(), - MF->getFrameInfo()->hasCalls(), - !MMI->getLandingPads().empty(), - MMI->getFrameMoves(), - MF->getFunction())); - } - } -}; - -} // End of namespace llvm - -//===----------------------------------------------------------------------===// - -/// Emit - Print the abbreviation using the specified Dwarf writer. -/// -void DIEAbbrev::Emit(const DwarfDebug &DD) const { - // Emit its Dwarf tag type. - DD.getAsm()->EmitULEB128Bytes(Tag); - DD.getAsm()->EOL(TagString(Tag)); - - // Emit whether it has children DIEs. - DD.getAsm()->EmitULEB128Bytes(ChildrenFlag); - DD.getAsm()->EOL(ChildrenString(ChildrenFlag)); - - // For each attribute description. - for (unsigned i = 0, N = Data.size(); i < N; ++i) { - const DIEAbbrevData &AttrData = Data[i]; - - // Emit attribute type. - DD.getAsm()->EmitULEB128Bytes(AttrData.getAttribute()); - DD.getAsm()->EOL(AttributeString(AttrData.getAttribute())); - - // Emit form type. - DD.getAsm()->EmitULEB128Bytes(AttrData.getForm()); - DD.getAsm()->EOL(FormEncodingString(AttrData.getForm())); - } - - // Mark end of abbreviation. - DD.getAsm()->EmitULEB128Bytes(0); DD.getAsm()->EOL("EOM(1)"); - DD.getAsm()->EmitULEB128Bytes(0); DD.getAsm()->EOL("EOM(2)"); -} - -#ifndef NDEBUG -void DIEAbbrev::print(std::ostream &O) { - O << "Abbreviation @" - << std::hex << (intptr_t)this << std::dec - << " " - << TagString(Tag) - << " " - << ChildrenString(ChildrenFlag) - << "\n"; - - for (unsigned i = 0, N = Data.size(); i < N; ++i) { - O << " " - << AttributeString(Data[i].getAttribute()) - << " " - << FormEncodingString(Data[i].getForm()) - << "\n"; - } -} -void DIEAbbrev::dump() { print(cerr); } -#endif - -//===----------------------------------------------------------------------===// - -#ifndef NDEBUG -void DIEValue::dump() { - print(cerr); -} -#endif - -//===----------------------------------------------------------------------===// - -/// EmitValue - Emit integer of appropriate size. -/// -void DIEInteger::EmitValue(DwarfDebug &DD, unsigned Form) { - switch (Form) { - case DW_FORM_flag: // Fall thru - case DW_FORM_ref1: // Fall thru - case DW_FORM_data1: DD.getAsm()->EmitInt8(Integer); break; - case DW_FORM_ref2: // Fall thru - case DW_FORM_data2: DD.getAsm()->EmitInt16(Integer); break; - case DW_FORM_ref4: // Fall thru - case DW_FORM_data4: DD.getAsm()->EmitInt32(Integer); break; - case DW_FORM_ref8: // Fall thru - case DW_FORM_data8: DD.getAsm()->EmitInt64(Integer); break; - case DW_FORM_udata: DD.getAsm()->EmitULEB128Bytes(Integer); break; - case DW_FORM_sdata: DD.getAsm()->EmitSLEB128Bytes(Integer); break; - default: assert(0 && "DIE Value form not supported yet"); break; - } -} - -/// SizeOf - Determine size of integer value in bytes. -/// -unsigned DIEInteger::SizeOf(const DwarfDebug &DD, unsigned Form) const { - switch (Form) { - case DW_FORM_flag: // Fall thru - case DW_FORM_ref1: // Fall thru - case DW_FORM_data1: return sizeof(int8_t); - case DW_FORM_ref2: // Fall thru - case DW_FORM_data2: return sizeof(int16_t); - case DW_FORM_ref4: // Fall thru - case DW_FORM_data4: return sizeof(int32_t); - case DW_FORM_ref8: // Fall thru - case DW_FORM_data8: return sizeof(int64_t); - case DW_FORM_udata: return TargetAsmInfo::getULEB128Size(Integer); - case DW_FORM_sdata: return TargetAsmInfo::getSLEB128Size(Integer); - default: assert(0 && "DIE Value form not supported yet"); break; - } - return 0; -} - -//===----------------------------------------------------------------------===// - -/// EmitValue - Emit string value. -/// -void DIEString::EmitValue(DwarfDebug &DD, unsigned Form) { - DD.getAsm()->EmitString(String); -} - -//===----------------------------------------------------------------------===// - -/// EmitValue - Emit label value. -/// -void DIEDwarfLabel::EmitValue(DwarfDebug &DD, unsigned Form) { - bool IsSmall = Form == DW_FORM_data4; - DD.EmitReference(Label, false, IsSmall); -} - -/// SizeOf - Determine size of label value in bytes. -/// -unsigned DIEDwarfLabel::SizeOf(const DwarfDebug &DD, unsigned Form) const { - if (Form == DW_FORM_data4) return 4; - return DD.getTargetData()->getPointerSize(); -} - -//===----------------------------------------------------------------------===// - -/// EmitValue - Emit label value. -/// -void DIEObjectLabel::EmitValue(DwarfDebug &DD, unsigned Form) { - bool IsSmall = Form == DW_FORM_data4; - DD.EmitReference(Label, false, IsSmall); -} - -/// SizeOf - Determine size of label value in bytes. -/// -unsigned DIEObjectLabel::SizeOf(const DwarfDebug &DD, unsigned Form) const { - if (Form == DW_FORM_data4) return 4; - return DD.getTargetData()->getPointerSize(); -} - -//===----------------------------------------------------------------------===// - -/// EmitValue - Emit delta value. -/// -void DIESectionOffset::EmitValue(DwarfDebug &DD, unsigned Form) { - bool IsSmall = Form == DW_FORM_data4; - DD.EmitSectionOffset(Label.Tag, Section.Tag, - Label.Number, Section.Number, IsSmall, IsEH, UseSet); -} - -/// SizeOf - Determine size of delta value in bytes. -/// -unsigned DIESectionOffset::SizeOf(const DwarfDebug &DD, unsigned Form) const { - if (Form == DW_FORM_data4) return 4; - return DD.getTargetData()->getPointerSize(); -} - -//===----------------------------------------------------------------------===// - -/// EmitValue - Emit delta value. -/// -void DIEDelta::EmitValue(DwarfDebug &DD, unsigned Form) { - bool IsSmall = Form == DW_FORM_data4; - DD.EmitDifference(LabelHi, LabelLo, IsSmall); -} - -/// SizeOf - Determine size of delta value in bytes. -/// -unsigned DIEDelta::SizeOf(const DwarfDebug &DD, unsigned Form) const { - if (Form == DW_FORM_data4) return 4; - return DD.getTargetData()->getPointerSize(); -} - -//===----------------------------------------------------------------------===// - -/// EmitValue - Emit debug information entry offset. -/// -void DIEntry::EmitValue(DwarfDebug &DD, unsigned Form) { - DD.getAsm()->EmitInt32(Entry->getOffset()); -} - -//===----------------------------------------------------------------------===// - -/// ComputeSize - calculate the size of the block. -/// -unsigned DIEBlock::ComputeSize(DwarfDebug &DD) { - if (!Size) { - const SmallVector<DIEAbbrevData, 8> &AbbrevData = Abbrev.getData(); - - for (unsigned i = 0, N = Values.size(); i < N; ++i) { - Size += Values[i]->SizeOf(DD, AbbrevData[i].getForm()); - } - } - return Size; -} - -/// EmitValue - Emit block data. -/// -void DIEBlock::EmitValue(DwarfDebug &DD, unsigned Form) { - switch (Form) { - case DW_FORM_block1: DD.getAsm()->EmitInt8(Size); break; - case DW_FORM_block2: DD.getAsm()->EmitInt16(Size); break; - case DW_FORM_block4: DD.getAsm()->EmitInt32(Size); break; - case DW_FORM_block: DD.getAsm()->EmitULEB128Bytes(Size); break; - default: assert(0 && "Improper form for block"); break; - } - - const SmallVector<DIEAbbrevData, 8> &AbbrevData = Abbrev.getData(); - - for (unsigned i = 0, N = Values.size(); i < N; ++i) { - DD.getAsm()->EOL(); - Values[i]->EmitValue(DD, AbbrevData[i].getForm()); - } -} - -/// SizeOf - Determine size of block data in bytes. -/// -unsigned DIEBlock::SizeOf(const DwarfDebug &DD, unsigned Form) const { - switch (Form) { - case DW_FORM_block1: return Size + sizeof(int8_t); - case DW_FORM_block2: return Size + sizeof(int16_t); - case DW_FORM_block4: return Size + sizeof(int32_t); - case DW_FORM_block: return Size + TargetAsmInfo::getULEB128Size(Size); - default: assert(0 && "Improper form for block"); break; - } - return 0; -} - -//===----------------------------------------------------------------------===// -/// DIE Implementation - -DIE::~DIE() { - for (unsigned i = 0, N = Children.size(); i < N; ++i) - delete Children[i]; -} - -/// AddSiblingOffset - Add a sibling offset field to the front of the DIE. -/// -void DIE::AddSiblingOffset() { - DIEInteger *DI = new DIEInteger(0); - Values.insert(Values.begin(), DI); - Abbrev.AddFirstAttribute(DW_AT_sibling, DW_FORM_ref4); -} - -/// Profile - Used to gather unique data for the value folding set. -/// -void DIE::Profile(FoldingSetNodeID &ID) { - Abbrev.Profile(ID); - - for (unsigned i = 0, N = Children.size(); i < N; ++i) - ID.AddPointer(Children[i]); - - for (unsigned j = 0, M = Values.size(); j < M; ++j) - ID.AddPointer(Values[j]); -} - -#ifndef NDEBUG -void DIE::print(std::ostream &O, unsigned IncIndent) { - static unsigned IndentCount = 0; - IndentCount += IncIndent; - const std::string Indent(IndentCount, ' '); - bool isBlock = Abbrev.getTag() == 0; - - if (!isBlock) { - O << Indent - << "Die: " - << "0x" << std::hex << (intptr_t)this << std::dec - << ", Offset: " << Offset - << ", Size: " << Size - << "\n"; - - O << Indent - << TagString(Abbrev.getTag()) - << " " - << ChildrenString(Abbrev.getChildrenFlag()); - } else { - O << "Size: " << Size; - } - O << "\n"; - - const SmallVector<DIEAbbrevData, 8> &Data = Abbrev.getData(); - - IndentCount += 2; - for (unsigned i = 0, N = Data.size(); i < N; ++i) { - O << Indent; - - if (!isBlock) - O << AttributeString(Data[i].getAttribute()); - else - O << "Blk[" << i << "]"; - - O << " " - << FormEncodingString(Data[i].getForm()) - << " "; - Values[i]->print(O); - O << "\n"; - } - IndentCount -= 2; - - for (unsigned j = 0, M = Children.size(); j < M; ++j) { - Children[j]->print(O, 4); - } - - if (!isBlock) O << "\n"; - IndentCount -= IncIndent; -} - -void DIE::dump() { - print(cerr); -} -#endif - -//===----------------------------------------------------------------------===// -/// DwarfWriter Implementation -/// - -DwarfWriter::DwarfWriter(std::ostream &OS, AsmPrinter *A, - const TargetAsmInfo *T) { - DE = new DwarfException(OS, A, T); - DD = new DwarfDebug(OS, A, T); -} - -DwarfWriter::~DwarfWriter() { - delete DE; - delete DD; -} - -/// SetModuleInfo - Set machine module info when it's known that pass manager -/// has created it. Set by the target AsmPrinter. -void DwarfWriter::SetModuleInfo(MachineModuleInfo *MMI) { - DD->SetModuleInfo(MMI); - DE->SetModuleInfo(MMI); -} - -/// BeginModule - Emit all Dwarf sections that should come prior to the -/// content. -void DwarfWriter::BeginModule(Module *M) { - DE->BeginModule(M); - DD->BeginModule(M); -} - -/// EndModule - Emit all Dwarf sections that should come after the content. -/// -void DwarfWriter::EndModule() { - DE->EndModule(); - DD->EndModule(); -} - -/// BeginFunction - Gather pre-function debug information. Assumes being -/// emitted immediately after the function entry point. -void DwarfWriter::BeginFunction(MachineFunction *MF) { - DE->BeginFunction(MF); - DD->BeginFunction(MF); -} - -/// EndFunction - Gather and emit post-function debug information. -/// -void DwarfWriter::EndFunction() { - DD->EndFunction(); - DE->EndFunction(); - - if (MachineModuleInfo *MMI = DD->getMMI() ? DD->getMMI() : DE->getMMI()) - // Clear function debug information. - MMI->EndFunction(); -} |
