It's not necessary to do rounding for alloca operations when the requested
alignment is equal to the stack alignment.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40004 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/DwarfWriter.cpp b/lib/CodeGen/DwarfWriter.cpp
new file mode 100644
index 0000000..257a776
--- /dev/null
+++ b/lib/CodeGen/DwarfWriter.cpp
@@ -0,0 +1,3616 @@
+//===-- llvm/CodeGen/DwarfWriter.cpp - Dwarf Framework ----------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file was developed by James M. Laskey and 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/Target/TargetAsmInfo.h"
+#include "llvm/Target/MRegisterInfo.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 <prefix><Tag><Number>, 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.
+ ///
+ std::vector<DIEAbbrevData> 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 std::vector<DIEAbbrevData> &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.
+ ///
+ std::vector<DIEValue *> Values;
+
+public:
+ 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; }
+ std::vector<DIEValue *> &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,
+ isDelta,
+ isEntry,
+ isBlock
+ };
+
+ /// Type - Type of data stored in the value.
+ ///
+ unsigned Type;
+
+ 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:
+ 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;
+
+ 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;
+
+ 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;
+
+ 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
+};
+
+//===----------------------------------------------------------------------===//
+/// 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;
+
+ 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 Printer.
+ const TargetAsmInfo *TAI;
+
+ /// TD - Target data.
+ const TargetData *TD;
+
+ /// RI - Register Information.
+ const MRegisterInfo *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;
+
+ unsigned SetCounter;
+ Dwarf(std::ostream &OS, AsmPrinter *A, const TargetAsmInfo *T)
+ : O(OS)
+ , Asm(A)
+ , TAI(T)
+ , TD(Asm->TM.getTargetData())
+ , RI(Asm->TM.getRegisterInfo())
+ , M(NULL)
+ , MF(NULL)
+ , MMI(NULL)
+ , SubprogramCount(0)
+ , SetCounter(1)
+ {
+ }
+
+public:
+
+ //===--------------------------------------------------------------------===//
+ // Accessors.
+ //
+ AsmPrinter *getAsm() const { return Asm; }
+ MachineModuleInfo *getMMI() const { return MMI; }
+ const TargetAsmInfo *getTargetAsmInfo() const { return TAI; }
+
+ /// 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,
+ bool isInSection = false) const {
+ if (isInSection && TAI->getDwarfSectionOffsetDirective())
+ O << TAI->getDwarfSectionOffsetDirective() << Tag;
+ else
+ O << TAI->getPrivateGlobalPrefix() << Tag;
+ if (Number) O << Number;
+ }
+
+ /// 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) const {
+ EmitReference(Label.Tag, Label.Number, IsPCRelative);
+ }
+ void EmitReference(const char *Tag, unsigned Number,
+ bool IsPCRelative = false) const {
+ if (TAI->getAddressSize() == sizeof(int32_t))
+ O << TAI->getData32bitsDirective();
+ else
+ O << TAI->getData64bitsDirective();
+
+ PrintLabelName(Tag, Number);
+
+ if (IsPCRelative) O << "-" << TAI->getPCSymbol();
+ }
+ void EmitReference(const std::string &Name, bool IsPCRelative = false) const {
+ if (TAI->getAddressSize() == sizeof(int32_t))
+ O << TAI->getData32bitsDirective();
+ else
+ O << TAI->getData64bitsDirective();
+
+ 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);
+ O << ",";
+ PrintLabelName(TagHi, NumberHi);
+ O << "-";
+ PrintLabelName(TagLo, NumberLo);
+ O << "\n";
+
+ if (IsSmall || TAI->getAddressSize() == sizeof(int32_t))
+ O << TAI->getData32bitsDirective();
+ else
+ O << TAI->getData64bitsDirective();
+
+ PrintLabelName("set", SetCounter);
+
+ ++SetCounter;
+ } else {
+ if (IsSmall || TAI->getAddressSize() == sizeof(int32_t))
+ O << TAI->getData32bitsDirective();
+ else
+ O << TAI->getData64bitsDirective();
+
+ 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 printAbsolute = false;
+ if (TAI->needsSet()) {
+ O << "\t.set\t";
+ PrintLabelName("set", SetCounter);
+ O << ",";
+ PrintLabelName(Label, LabelNumber, true);
+
+ if (isEH)
+ printAbsolute = TAI->isAbsoluteEHSectionOffsets();
+ else
+ printAbsolute = TAI->isAbsoluteDebugSectionOffsets();
+
+ if (!printAbsolute) {
+ O << "-";
+ PrintLabelName(Section, SectionNumber);
+ }
+ O << "\n";
+
+ if (IsSmall || TAI->getAddressSize() == sizeof(int32_t))
+ O << TAI->getData32bitsDirective();
+ else
+ O << TAI->getData64bitsDirective();
+
+ PrintLabelName("set", SetCounter);
+ ++SetCounter;
+ } else {
+ if (IsSmall || TAI->getAddressSize() == sizeof(int32_t))
+ O << TAI->getData32bitsDirective();
+ else
+ O << TAI->getData64bitsDirective();
+
+ PrintLabelName(Label, LabelNumber, true);
+
+ if (isEH)
+ printAbsolute = TAI->isAbsoluteEHSectionOffsets();
+ else
+ printAbsolute = TAI->isAbsoluteDebugSectionOffsets();
+
+ 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) {
+ int stackGrowth =
+ Asm->TM.getFrameInfo()->getStackGrowthDirection() ==
+ TargetFrameInfo::StackGrowsUp ?
+ TAI->getAddressSize() : -TAI->getAddressSize();
+ 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()));
+ 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()));
+ Asm->EOL("Register");
+ } else {
+ assert(0 && "Machine move no supported yet.");
+ }
+ } else {
+ unsigned Reg = RI->getDwarfRegNum(Src.getRegister());
+ 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);
+ Asm->EOL("DW_CFA_offset + Reg");
+ 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);
+ }
+
+ /// 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 {
+ delete Block;
+ }
+
+ 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());
+ 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, TAI->getAddressSize());
+ 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 = dyn_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);
+ if (TAI->isAbsoluteDebugSectionOffsets())
+ AddLabel(Die, DW_AT_stmt_list, DW_FORM_data4, DWLabel("section_line", 0));
+ else
+ AddDelta(Die, DW_AT_stmt_list, DW_FORM_data4, DWLabel("section_line", 0),
+ DWLabel("section_line", 0));
+ 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;
+ RI->getLocation(*MF, DV->getFrameIndex(), Location);
+ 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);
+ Asm->EOL(std::string("Abbrev [" +
+ utostr(AbbrevNumber) +
+ "] 0x" + utohexstr(Die->getOffset()) +
+ ":0x" + utohexstr(Die->getSize()) + " " +
+ TagString(Abbrev->getTag())));
+
+ std::vector<DIEValue *> &Values = Die->getValues();
+ const std::vector<DIEAbbrevData> &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 += Asm->SizeULEB128(AbbrevNumber);
+
+ const std::vector<DIEValue *> &Values = Die->getValues();
+ const std::vector<DIEAbbrevData> &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(TAI->getAddressSize()); 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();
+ }
+ }
+
+ /// EmitDebugLines - Emit source line information.
+ ///
+ void EmitDebugLines() {
+ // 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.
+ for (unsigned j = 0, M = SectionSourceLines.size(); j < M; ++j) {
+ // Isolate current sections line info.
+ const std::vector<SourceLineInfo> &LineInfos = SectionSourceLines[j];
+
+ Asm->EOL(std::string("Section ") + SectionMap[j + 1]);
+
+ // 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();
+ Asm->EOL(Directories[DirectoryID]
+ + SourceFile.getName()
+ + ":"
+ + utostr_32(LineInfo.getLine()));
+
+ // Define the line address.
+ Asm->EmitInt8(0); Asm->EOL("Extended Op");
+ Asm->EmitInt8(TAI->getAddressSize() + 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");
+ }
+ }
+
+ // Define last address of section.
+ Asm->EmitInt8(0); Asm->EOL("Extended Op");
+ Asm->EmitInt8(TAI->getAddressSize() + 1); Asm->EOL("Op size");
+ Asm->EmitInt8(DW_LNE_set_address); Asm->EOL("DW_LNE_set_address");
+ EmitReference("section_end", j + 1); 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();
+ }
+
+ 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 ?
+ TAI->getAddressSize() : -TAI->getAddressSize();
+
+ // 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()));
+ Asm->EOL("CIE RA Column");
+
+ std::vector<MachineMove> Moves;
+ RI->getInitialFrameState(Moves);
+
+ EmitFrameMoves(NULL, 0, Moves);
+
+ Asm->EmitAlignment(2);
+ 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);
+
+ Asm->EmitAlignment(2);
+ 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(TAI->getAddressSize()); 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)");
+
+ Asm->EOL();
+ #endif
+ }
+
+ /// 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);
+
+ 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);
+
+ 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)
+ , 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;
+
+ // Emit initial sections
+ EmitInitial();
+
+ // 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());
+ }
+ }
+
+ /// BeginModule - Emit all Dwarf sections that should come prior to the
+ /// content.
+ void BeginModule(Module *M) {
+ this->M = M;
+
+ if (!ShouldEmitDwarf()) return;
+ }
+
+ /// 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);
+ }
+
+ /// 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;
+
+ FunctionEHFrameInfo(const std::string &FN, unsigned Num, unsigned P,
+ bool hC, bool hL,
+ const std::vector<MachineMove> &M):
+ FnName(FN), Number(Num), PersonalityIndex(P),
+ hasCalls(hC), hasLandingPads(hL), Moves(M) { };
+ };
+
+ std::vector<FunctionEHFrameInfo> EHFrames;
+
+ /// shouldEmit - Flag to indicate if debug information should be emitted.
+ ///
+ bool shouldEmit;
+
+ /// 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 ?
+ TAI->getAddressSize() : -TAI->getAddressSize();
+
+ // 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()));
+ Asm->EOL("CIE RA Column");
+
+ // If there is a personality, we need to indicate the functions location.
+ if (Personality) {
+ Asm->EmitULEB128Bytes(7);
+ Asm->EOL("Augmentation Size");
+ Asm->EmitInt8(DW_EH_PE_pcrel | DW_EH_PE_sdata4);
+ Asm->EOL("Personality (pcrel sdata4)");
+
+ O << TAI->getData32bitsDirective();
+ Asm->EmitExternalGlobal((const GlobalVariable *)(Personality));
+ O << "-" << TAI->getPCSymbol();
+ Asm->EOL("Personality");
+
+ Asm->EmitULEB128Bytes(DW_EH_PE_pcrel);
+ Asm->EOL("LSDA Encoding (pcrel)");
+ Asm->EmitULEB128Bytes(DW_EH_PE_pcrel);
+ Asm->EOL("FDE Encoding (pcrel)");
+ } else {
+ Asm->EmitULEB128Bytes(1);
+ Asm->EOL("Augmentation Size");
+ Asm->EmitULEB128Bytes(DW_EH_PE_pcrel);
+ Asm->EOL("FDE Encoding (pcrel)");
+ }
+
+ // Indicate locations of general callee saved registers in frame.
+ std::vector<MachineMove> Moves;
+ RI->getInitialFrameState(Moves);
+ EmitFrameMoves(NULL, 0, Moves);
+
+ Asm->EmitAlignment(2);
+ EmitLabel("eh_frame_common_end", Index);
+
+ Asm->EOL();
+ }
+
+ /// EmitEHFrame - Emit function exception frame information.
+ ///
+ void EmitEHFrame(const FunctionEHFrameInfo &EHFrameInfo) {
+ Asm->SwitchToTextSection(TAI->getDwarfEHFrameSection());
+
+ // Externally visible entry into the functions eh frame info.
+ if (const char *GlobalDirective = TAI->getGlobalDirective())
+ O << GlobalDirective << EHFrameInfo.FnName << ".eh\n";
+
+ // If there are no calls then you can't unwind.
+ if (!EHFrameInfo.hasCalls) {
+ O << EHFrameInfo.FnName << ".eh = 0\n";
+ } else {
+ O << EHFrameInfo.FnName << ".eh:\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);
+ Asm->EOL("FDE CIE offset");
+
+ EmitReference("eh_func_begin", EHFrameInfo.Number, true);
+ Asm->EOL("FDE initial location");
+ EmitDifference("eh_func_end", EHFrameInfo.Number,
+ "eh_func_begin", EHFrameInfo.Number);
+ 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);
+ } else if(TAI->getAddressSize() == 8) {
+ Asm->EmitInt64((int)0);
+ } 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);
+
+ Asm->EmitAlignment(2);
+ EmitLabel("eh_frame_end", EHFrameInfo.Number);
+ }
+
+ if (const char *UsedDirective = TAI->getUsedDirective())
+ O << UsedDirective << EHFrameInfo.FnName << ".eh\n\n";
+ }
+
+ /// EmitExceptionTable - Emit landpads 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 isPod() { return true; }
+ };
+
+ struct PadSite {
+ unsigned PadIndex;
+ unsigned SiteIndex;
+ };
+
+ typedef DenseMap<unsigned, PadSite, KeyInfo> PadMapType;
+
+ struct ActionEntry {
+ int ValueForTypeID; // The value to write - may not be equal to the type id.
+ int NextAction;
+ struct ActionEntry *Previous;
+ };
+
+ void EmitExceptionTable() {
+ // Map all labels and get rid of any dead landing pads.
+ MMI->TidyLandingPads();
+
+ 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);
+
+ // Gather first action index for each landing pad site.
+ SmallVector<unsigned, 64> FirstActions;
+ FirstActions.reserve(PadInfos.size());
+
+ // The actions table.
+ SmallVector<ActionEntry, 32> Actions;
+
+ // 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 -= Asm->SizeULEB128(*I);
+ }
+
+ // Compute sizes for exception table.
+ unsigned SizeSites = 0;
+ unsigned SizeActions = 0;
+
+ // Look at each landing pad site to compute size. We need the size of each
+ // landing pad site info and the size of the landing pad's actions.
+ int FirstAction = 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 = Asm->SizeSLEB128(PrevAction->NextAction) +
+ Asm->SizeSLEB128(PrevAction->ValueForTypeID);
+ for (unsigned j = NumShared; j != SizePrevIds; ++j) {
+ SizeAction -= Asm->SizeSLEB128(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 = Asm->SizeSLEB128(ValueForTypeID);
+
+ int NextAction = SizeAction ? -(SizeAction + SizeTypeID) : 0;
+ SizeAction = SizeTypeID + Asm->SizeSLEB128(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;
+ unsigned M = LP->BeginLabels.size();
+ SizeSites += M*(sizeof(int32_t) + // Site start.
+ sizeof(int32_t) + // Site length.
+ sizeof(int32_t) + // Landing pad.
+ Asm->SizeULEB128(FirstAction)); // Action.
+ }
+
+ // Final tallies.
+ unsigned SizeTypes = TypeInfos.size() * TAI->getAddressSize();
+
+ unsigned TypeOffset = sizeof(int8_t) + // Call site format
+ Asm->SizeULEB128(SizeSites) + // Call-site table length
+ SizeSites + SizeActions + SizeTypes;
+
+ unsigned TotalSize = sizeof(int8_t) + // LPStart format
+ sizeof(int8_t) + // TType format
+ Asm->SizeULEB128(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);
+ 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 in order of address.
+ PadMapType PadMap;
+
+ 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!");
+ PadSite P = { i, j };
+ PadMap[BeginLabel] = P;
+ }
+ }
+
+ 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->getOpcode() != TargetInstrInfo::LABEL)
+ continue;
+
+ unsigned BeginLabel = MI->getOperand(0).getImmedValue();
+ PadMapType::iterator L = PadMap.find(BeginLabel);
+
+ if (L == PadMap.end())
+ continue;
+
+ PadSite P = L->second;
+ const LandingPadInfo *LandingPad = LandingPads[P.PadIndex];
+
+ assert(BeginLabel == LandingPad->BeginLabels[P.SiteIndex] &&
+ "Inconsistent landing pad map!");
+
+ EmitSectionOffset("label", "eh_func_begin", BeginLabel, SubprogramCount,
+ false, true);
+ Asm->EOL("Region start");
+
+ EmitDifference("label", LandingPad->EndLabels[P.SiteIndex],
+ "label", BeginLabel);
+ Asm->EOL("Region length");
+
+ if (LandingPad->TypeIds.empty()) {
+ if (TAI->getAddressSize() == sizeof(int32_t))
+ Asm->EmitInt32(0);
+ else
+ Asm->EmitInt64(0);
+ } else {
+ EmitSectionOffset("label", "eh_func_begin",
+ LandingPad->LandingPadLabel, SubprogramCount,
+ false, true);
+ }
+ Asm->EOL("Landing pad");
+
+ Asm->EmitULEB128Bytes(FirstActions[P.PadIndex]);
+ 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];
+
+ if (TAI->getAddressSize() == sizeof(int32_t))
+ O << TAI->getData32bitsDirective();
+ else
+ O << TAI->getData64bitsDirective();
+
+ 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);
+ }
+
+public:
+ //===--------------------------------------------------------------------===//
+ // Main entry points.
+ //
+ DwarfException(std::ostream &OS, AsmPrinter *A, const TargetAsmInfo *T)
+ : Dwarf(OS, A, T)
+ , shouldEmit(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 (!shouldEmit) return;
+
+ 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;
+
+ if (MMI &&
+ ExceptionHandling &&
+ TAI->doesSupportExceptionHandling()) {
+ shouldEmit = true;
+ // Assumes in correct section after the entry point.
+ EmitLabel("eh_func_begin", ++SubprogramCount);
+ }
+ }
+
+ /// EndFunction - Gather and emit post-function exception information.
+ ///
+ void EndFunction() {
+ if (!shouldEmit) return;
+
+ EmitLabel("eh_func_end", SubprogramCount);
+ EmitExceptionTable();
+
+ // Save EH frame information
+ EHFrames.push_back(FunctionEHFrameInfo(getAsm()->CurrentFnName,
+ SubprogramCount,
+ MMI->getPersonalityIndex(),
+ MF->getFrameInfo()->hasCalls(),
+ !MMI->getLandingPads().empty(),
+ MMI->getFrameMoves()));
+ }
+};
+
+} // 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 DD.getAsm()->SizeULEB128(Integer);
+ case DW_FORM_sdata: return DD.getAsm()->SizeSLEB128(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) {
+ DD.EmitReference(Label);
+}
+
+/// SizeOf - Determine size of label value in bytes.
+///
+unsigned DIEDwarfLabel::SizeOf(const DwarfDebug &DD, unsigned Form) const {
+ return DD.getTargetAsmInfo()->getAddressSize();
+}
+
+//===----------------------------------------------------------------------===//
+
+/// EmitValue - Emit label value.
+///
+void DIEObjectLabel::EmitValue(DwarfDebug &DD, unsigned Form) {
+ DD.EmitReference(Label);
+}
+
+/// SizeOf - Determine size of label value in bytes.
+///
+unsigned DIEObjectLabel::SizeOf(const DwarfDebug &DD, unsigned Form) const {
+ return DD.getTargetAsmInfo()->getAddressSize();
+}
+
+//===----------------------------------------------------------------------===//
+
+/// 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.getTargetAsmInfo()->getAddressSize();
+}
+
+//===----------------------------------------------------------------------===//
+
+/// 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 std::vector<DIEAbbrevData> &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 std::vector<DIEAbbrevData> &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 + DD.getAsm()->SizeULEB128(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 std::vector<DIEAbbrevData> &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();
+ }
+}