-//===-- llvm/CodeGen/DwarfWriter.cpp - Dwarf Framework ----------*- C++ -*-===//
+//===-- llvm/CodeGen/DwarfWriter.cpp - Dwarf Framework --------------------===//
//
// The LLVM Compiler Infrastructure
//
//===----------------------------------------------------------------------===//
#include "llvm/CodeGen/DwarfWriter.h"
+#include "DwarfDebug.h"
+#include "DwarfException.h"
+#include "llvm/CodeGen/MachineModuleInfo.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/DerivedTypes.h"
-#include "llvm/Constants.h"
-#include "llvm/CodeGen/AsmPrinter.h"
-#include "llvm/CodeGen/MachineModuleInfo.h"
-#include "llvm/CodeGen/MachineFrameInfo.h"
-#include "llvm/CodeGen/MachineLocation.h"
-#include "llvm/Analysis/DebugInfo.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/Support/raw_ostream.h"
-#include "llvm/System/Path.h"
-#include "llvm/Target/TargetAsmInfo.h"
-#include "llvm/Target/TargetRegisterInfo.h"
-#include "llvm/Target/TargetData.h"
-#include "llvm/Target/TargetFrameInfo.h"
-#include "llvm/Target/TargetInstrInfo.h"
-#include "llvm/Target/TargetMachine.h"
-#include "llvm/Target/TargetOptions.h"
-#include <ostream>
-#include <string>
-using namespace llvm;
-using namespace llvm::dwarf;
-
-static RegisterPass<DwarfWriter>
-X("dwarfwriter", "DWARF Information Writer");
-char DwarfWriter::ID = 0;
-
-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;
-
-//===----------------------------------------------------------------------===//
-/// Utility routines.
-///
-/// getGlobalVariablesUsing - Return all of the GlobalVariables which have the
-/// specified value in their initializer somewhere.
-static void
-getGlobalVariablesUsing(Value *V, std::vector<GlobalVariable*> &Result) {
- // Scan though value users.
- for (Value::use_iterator I = V->use_begin(), E = V->use_end(); I != E; ++I) {
- if (GlobalVariable *GV = dyn_cast<GlobalVariable>(*I)) {
- // If the user is a GlobalVariable then add to result.
- Result.push_back(GV);
- } else if (Constant *C = dyn_cast<Constant>(*I)) {
- // If the user is a constant variable then scan its users.
- getGlobalVariablesUsing(C, Result);
- }
- }
-}
-
-/// getGlobalVariablesUsing - Return all of the GlobalVariables that use the
-/// named GlobalVariable.
-static void
-getGlobalVariablesUsing(Module &M, const std::string &RootName,
- std::vector<GlobalVariable*> &Result) {
- std::vector<const Type*> FieldTypes;
- FieldTypes.push_back(Type::Int32Ty);
- FieldTypes.push_back(Type::Int32Ty);
-
- // Get the GlobalVariable root.
- GlobalVariable *UseRoot = M.getGlobalVariable(RootName,
- StructType::get(FieldTypes));
-
- // If present and linkonce then scan for users.
- if (UseRoot && UseRoot->hasLinkOnceLinkage())
- getGlobalVariablesUsing(UseRoot, Result);
-}
-
-/// getGlobalVariable - Return either a direct or cast Global value.
-///
-static GlobalVariable *getGlobalVariable(Value *V) {
- if (GlobalVariable *GV = dyn_cast<GlobalVariable>(V)) {
- return GV;
- } else if (ConstantExpr *CE = dyn_cast<ConstantExpr>(V)) {
- if (CE->getOpcode() == Instruction::BitCast) {
- return dyn_cast<GlobalVariable>(CE->getOperand(0));
- } else if (CE->getOpcode() == Instruction::GetElementPtr) {
- for (unsigned int i=1; i<CE->getNumOperands(); i++) {
- if (!CE->getOperand(i)->isNullValue())
- return NULL;
- }
- return dyn_cast<GlobalVariable>(CE->getOperand(0));
- }
- }
- return NULL;
-}
-
-//===----------------------------------------------------------------------===//
-/// DWLabel - Labels are used to track locations in the assembler file.
-/// Labels appear in the form @verbatim <prefix><Tag><Number> @endverbatim,
-/// where the tag is a category of label (Ex. location) and number is a value
-/// unique in that category.
-class DWLabel {
-public:
- /// Tag - Label category tag. Should always be a staticly declared C string.
- ///
- const char *Tag;
-
- /// Number - Value to make label unique.
- ///
- unsigned Number;
-
- DWLabel(const char *T, unsigned N) : Tag(T), Number(N) {}
-
- void Profile(FoldingSetNodeID &ID) const {
- ID.AddString(std::string(Tag));
- ID.AddInteger(Number);
- }
-
-#ifndef NDEBUG
- void print(std::ostream *O) const {
- if (O) print(*O);
- }
- void print(std::ostream &O) const {
- O << "." << Tag;
- if (Number) O << Number;
- }
-#endif
-};
-
-//===----------------------------------------------------------------------===//
-/// DIEAbbrevData - Dwarf abbreviation data, describes the one attribute of a
-/// Dwarf abbreviation.
-class DIEAbbrevData {
-private:
- /// Attribute - Dwarf attribute code.
- ///
- unsigned Attribute;
-
- /// Form - Dwarf form code.
- ///
- unsigned Form;
-
-public:
- DIEAbbrevData(unsigned A, unsigned F)
- : Attribute(A)
- , Form(F)
- {}
-
- // Accessors.
- unsigned getAttribute() const { return Attribute; }
- unsigned getForm() const { return Form; }
-
- /// Profile - Used to gather unique data for the abbreviation folding set.
- ///
- void Profile(FoldingSetNodeID &ID)const {
- ID.AddInteger(Attribute);
- ID.AddInteger(Form);
- }
-};
-
-//===----------------------------------------------------------------------===//
-/// DIEAbbrev - Dwarf abbreviation, describes the organization of a debug
-/// information object.
-class DIEAbbrev : public FoldingSetNode {
-private:
- /// Tag - Dwarf tag code.
- ///
- unsigned Tag;
-
- /// Unique number for node.
- ///
- unsigned Number;
-
- /// ChildrenFlag - Dwarf children flag.
- ///
- unsigned ChildrenFlag;
-
- /// Data - Raw data bytes for abbreviation.
- ///
- SmallVector<DIEAbbrevData, 8> Data;
-
-public:
-
- DIEAbbrev(unsigned T, unsigned C)
- : Tag(T)
- , ChildrenFlag(C)
- , Data()
- {}
- ~DIEAbbrev() {}
-
- // Accessors.
- unsigned getTag() const { return Tag; }
- unsigned getNumber() const { return Number; }
- unsigned getChildrenFlag() const { return ChildrenFlag; }
- const SmallVector<DIEAbbrevData, 8> &getData() const { return Data; }
- void setTag(unsigned T) { Tag = T; }
- void setChildrenFlag(unsigned CF) { ChildrenFlag = CF; }
- void setNumber(unsigned N) { Number = N; }
-
- /// AddAttribute - Adds another set of attribute information to the
- /// abbreviation.
- void AddAttribute(unsigned Attribute, unsigned Form) {
- Data.push_back(DIEAbbrevData(Attribute, Form));
- }
-
- /// AddFirstAttribute - Adds a set of attribute information to the front
- /// of the abbreviation.
- void AddFirstAttribute(unsigned Attribute, unsigned Form) {
- Data.insert(Data.begin(), DIEAbbrevData(Attribute, Form));
- }
-
- /// Profile - Used to gather unique data for the abbreviation folding set.
- ///
- void Profile(FoldingSetNodeID &ID) {
- ID.AddInteger(Tag);
- ID.AddInteger(ChildrenFlag);
-
- // For each attribute description.
- for (unsigned i = 0, N = Data.size(); i < N; ++i)
- Data[i].Profile(ID);
- }
-
- /// Emit - Print the abbreviation using the specified Dwarf writer.
- ///
- void Emit(const DwarfDebug &DD) const;
-
-#ifndef NDEBUG
- void print(std::ostream *O) {
- if (O) print(*O);
- }
- void print(std::ostream &O);
- void dump();
-#endif
-};
-
-//===----------------------------------------------------------------------===//
-/// DIE - A structured debug information entry. Has an abbreviation which
-/// describes it's organization.
-class DIE : public FoldingSetNode {
-protected:
- /// Abbrev - Buffer for constructing abbreviation.
- ///
- DIEAbbrev Abbrev;
-
- /// Offset - Offset in debug info section.
- ///
- unsigned Offset;
-
- /// Size - Size of instance + children.
- ///
- unsigned Size;
-
- /// Children DIEs.
- ///
- std::vector<DIE *> Children;
-
- /// Attributes values.
- ///
- SmallVector<DIEValue*, 32> Values;
-
-public:
- explicit DIE(unsigned Tag)
- : Abbrev(Tag, DW_CHILDREN_no)
- , Offset(0)
- , Size(0)
- , Children()
- , Values()
- {}
- virtual ~DIE();
-
- // Accessors.
- DIEAbbrev &getAbbrev() { return Abbrev; }
- unsigned getAbbrevNumber() const {
- return Abbrev.getNumber();
- }
- unsigned getTag() const { return Abbrev.getTag(); }
- unsigned getOffset() const { return Offset; }
- unsigned getSize() const { return Size; }
- const std::vector<DIE *> &getChildren() const { return Children; }
- SmallVector<DIEValue*, 32> &getValues() { return Values; }
- void setTag(unsigned Tag) { Abbrev.setTag(Tag); }
- void setOffset(unsigned O) { Offset = O; }
- void setSize(unsigned S) { Size = S; }
-
- /// AddValue - Add a value and attributes to a DIE.
- ///
- void AddValue(unsigned Attribute, unsigned Form, DIEValue *Value) {
- Abbrev.AddAttribute(Attribute, Form);
- Values.push_back(Value);
- }
-
- /// SiblingOffset - Return the offset of the debug information entry's
- /// sibling.
- unsigned SiblingOffset() const { return Offset + Size; }
-
- /// AddSiblingOffset - Add a sibling offset field to the front of the DIE.
- ///
- void AddSiblingOffset();
-
- /// AddChild - Add a child to the DIE.
- ///
- void AddChild(DIE *Child) {
- Abbrev.setChildrenFlag(DW_CHILDREN_yes);
- Children.push_back(Child);
- }
-
- /// Detach - Detaches objects connected to it after copying.
- ///
- void Detach() {
- Children.clear();
- }
-
- /// Profile - Used to gather unique data for the value folding set.
- ///
- void Profile(FoldingSetNodeID &ID) ;
-
-#ifndef NDEBUG
- void print(std::ostream *O, unsigned IncIndent = 0) {
- if (O) print(*O, IncIndent);
- }
- void print(std::ostream &O, unsigned IncIndent = 0);
- void dump();
-#endif
-};
-
-//===----------------------------------------------------------------------===//
-/// DIEValue - A debug information entry value.
-///
-class DIEValue : public FoldingSetNode {
-public:
- enum {
- isInteger,
- isString,
- isLabel,
- isAsIsLabel,
- isSectionOffset,
- isDelta,
- isEntry,
- isBlock
- };
-
- /// Type - Type of data stored in the value.
- ///
- unsigned Type;
-
- explicit DIEValue(unsigned T)
- : Type(T)
- {}
- virtual ~DIEValue() {}
-
- // Accessors
- unsigned getType() const { return Type; }
-
- // Implement isa/cast/dyncast.
- static bool classof(const DIEValue *) { return true; }
-
- /// EmitValue - Emit value via the Dwarf writer.
- ///
- virtual void EmitValue(DwarfDebug &DD, unsigned Form) = 0;
-
- /// SizeOf - Return the size of a value in bytes.
- ///
- virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const = 0;
-
- /// Profile - Used to gather unique data for the value folding set.
- ///
- virtual void Profile(FoldingSetNodeID &ID) = 0;
-
-#ifndef NDEBUG
- void print(std::ostream *O) {
- if (O) print(*O);
- }
- virtual void print(std::ostream &O) = 0;
- void dump();
-#endif
-};
-
-//===----------------------------------------------------------------------===//
-/// DWInteger - An integer value DIE.
-///
-class DIEInteger : public DIEValue {
-private:
- uint64_t Integer;
-
-public:
- explicit DIEInteger(uint64_t I) : DIEValue(isInteger), Integer(I) {}
-
- // Implement isa/cast/dyncast.
- static bool classof(const DIEInteger *) { return true; }
- static bool classof(const DIEValue *I) { return I->Type == isInteger; }
-
- /// BestForm - Choose the best form for integer.
- ///
- static unsigned BestForm(bool IsSigned, uint64_t Integer) {
- if (IsSigned) {
- if ((char)Integer == (signed)Integer) return DW_FORM_data1;
- if ((short)Integer == (signed)Integer) return DW_FORM_data2;
- if ((int)Integer == (signed)Integer) return DW_FORM_data4;
- } else {
- if ((unsigned char)Integer == Integer) return DW_FORM_data1;
- if ((unsigned short)Integer == Integer) return DW_FORM_data2;
- if ((unsigned int)Integer == Integer) return DW_FORM_data4;
- }
- return DW_FORM_data8;
- }
-
- /// EmitValue - Emit integer of appropriate size.
- ///
- virtual void EmitValue(DwarfDebug &DD, unsigned Form);
-
- /// SizeOf - Determine size of integer value in bytes.
- ///
- virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const;
-
- /// Profile - Used to gather unique data for the value folding set.
- ///
- static void Profile(FoldingSetNodeID &ID, unsigned Integer) {
- ID.AddInteger(isInteger);
- ID.AddInteger(Integer);
- }
- virtual void Profile(FoldingSetNodeID &ID) { Profile(ID, Integer); }
-
-#ifndef NDEBUG
- virtual void print(std::ostream &O) {
- O << "Int: " << (int64_t)Integer
- << " 0x" << std::hex << Integer << std::dec;
- }
-#endif
-};
-
-//===----------------------------------------------------------------------===//
-/// DIEString - A string value DIE.
-///
-class DIEString : public DIEValue {
-public:
- const std::string String;
-
- explicit DIEString(const std::string &S) : DIEValue(isString), String(S) {}
-
- // Implement isa/cast/dyncast.
- static bool classof(const DIEString *) { return true; }
- static bool classof(const DIEValue *S) { return S->Type == isString; }
-
- /// EmitValue - Emit string value.
- ///
- virtual void EmitValue(DwarfDebug &DD, unsigned Form);
-
- /// SizeOf - Determine size of string value in bytes.
- ///
- virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const {
- return String.size() + sizeof(char); // sizeof('\0');
- }
-
- /// Profile - Used to gather unique data for the value folding set.
- ///
- static void Profile(FoldingSetNodeID &ID, const std::string &String) {
- ID.AddInteger(isString);
- ID.AddString(String);
- }
- virtual void Profile(FoldingSetNodeID &ID) { Profile(ID, String); }
-
-#ifndef NDEBUG
- virtual void print(std::ostream &O) {
- O << "Str: \"" << String << "\"";
- }
-#endif
-};
-
-//===----------------------------------------------------------------------===//
-/// DIEDwarfLabel - A Dwarf internal label expression DIE.
-//
-class DIEDwarfLabel : public DIEValue {
-public:
-
- const DWLabel Label;
-
- explicit DIEDwarfLabel(const DWLabel &L) : DIEValue(isLabel), Label(L) {}
-
- // Implement isa/cast/dyncast.
- static bool classof(const DIEDwarfLabel *) { return true; }
- static bool classof(const DIEValue *L) { return L->Type == isLabel; }
-
- /// EmitValue - Emit label value.
- ///
- virtual void EmitValue(DwarfDebug &DD, unsigned Form);
-
- /// SizeOf - Determine size of label value in bytes.
- ///
- virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const;
-
- /// Profile - Used to gather unique data for the value folding set.
- ///
- static void Profile(FoldingSetNodeID &ID, const DWLabel &Label) {
- ID.AddInteger(isLabel);
- Label.Profile(ID);
- }
- virtual void Profile(FoldingSetNodeID &ID) { Profile(ID, Label); }
-
-#ifndef NDEBUG
- virtual void print(std::ostream &O) {
- O << "Lbl: ";
- Label.print(O);
- }
-#endif
-};
-
-
-//===----------------------------------------------------------------------===//
-/// DIEObjectLabel - A label to an object in code or data.
-//
-class DIEObjectLabel : public DIEValue {
-public:
- const std::string Label;
-
- explicit DIEObjectLabel(const std::string &L)
- : DIEValue(isAsIsLabel), Label(L) {}
-
- // Implement isa/cast/dyncast.
- static bool classof(const DIEObjectLabel *) { return true; }
- static bool classof(const DIEValue *L) { return L->Type == isAsIsLabel; }
-
- /// EmitValue - Emit label value.
- ///
- virtual void EmitValue(DwarfDebug &DD, unsigned Form);
-
- /// SizeOf - Determine size of label value in bytes.
- ///
- virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const;
-
- /// Profile - Used to gather unique data for the value folding set.
- ///
- static void Profile(FoldingSetNodeID &ID, const std::string &Label) {
- ID.AddInteger(isAsIsLabel);
- ID.AddString(Label);
- }
- virtual void Profile(FoldingSetNodeID &ID) { Profile(ID, Label); }
-
-#ifndef NDEBUG
- virtual void print(std::ostream &O) {
- O << "Obj: " << Label;
- }
-#endif
-};
-
-//===----------------------------------------------------------------------===//
-/// DIESectionOffset - A section offset DIE.
-//
-class DIESectionOffset : public DIEValue {
-public:
- const DWLabel Label;
- const DWLabel Section;
- bool IsEH : 1;
- bool UseSet : 1;
-
- DIESectionOffset(const DWLabel &Lab, const DWLabel &Sec,
- bool isEH = false, bool useSet = true)
- : DIEValue(isSectionOffset), Label(Lab), Section(Sec),
- IsEH(isEH), UseSet(useSet) {}
-
- // Implement isa/cast/dyncast.
- static bool classof(const DIESectionOffset *) { return true; }
- static bool classof(const DIEValue *D) { return D->Type == isSectionOffset; }
-
- /// EmitValue - Emit section offset.
- ///
- virtual void EmitValue(DwarfDebug &DD, unsigned Form);
-
- /// SizeOf - Determine size of section offset value in bytes.
- ///
- virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const;
-
- /// Profile - Used to gather unique data for the value folding set.
- ///
- static void Profile(FoldingSetNodeID &ID, const DWLabel &Label,
- const DWLabel &Section) {
- ID.AddInteger(isSectionOffset);
- Label.Profile(ID);
- Section.Profile(ID);
- // IsEH and UseSet are specific to the Label/Section that we will emit
- // the offset for; so Label/Section are enough for uniqueness.
- }
- virtual void Profile(FoldingSetNodeID &ID) { Profile(ID, Label, Section); }
-
-#ifndef NDEBUG
- virtual void print(std::ostream &O) {
- O << "Off: ";
- Label.print(O);
- O << "-";
- Section.print(O);
- O << "-" << IsEH << "-" << UseSet;
- }
-#endif
-};
-
-//===----------------------------------------------------------------------===//
-/// DIEDelta - A simple label difference DIE.
-///
-class DIEDelta : public DIEValue {
-public:
- const DWLabel LabelHi;
- const DWLabel LabelLo;
-
- DIEDelta(const DWLabel &Hi, const DWLabel &Lo)
- : DIEValue(isDelta), LabelHi(Hi), LabelLo(Lo) {}
-
- // Implement isa/cast/dyncast.
- static bool classof(const DIEDelta *) { return true; }
- static bool classof(const DIEValue *D) { return D->Type == isDelta; }
-
- /// EmitValue - Emit delta value.
- ///
- virtual void EmitValue(DwarfDebug &DD, unsigned Form);
-
- /// SizeOf - Determine size of delta value in bytes.
- ///
- virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const;
-
- /// Profile - Used to gather unique data for the value folding set.
- ///
- static void Profile(FoldingSetNodeID &ID, const DWLabel &LabelHi,
- const DWLabel &LabelLo) {
- ID.AddInteger(isDelta);
- LabelHi.Profile(ID);
- LabelLo.Profile(ID);
- }
- virtual void Profile(FoldingSetNodeID &ID) { Profile(ID, LabelHi, LabelLo); }
-
-#ifndef NDEBUG
- virtual void print(std::ostream &O) {
- O << "Del: ";
- LabelHi.print(O);
- O << "-";
- LabelLo.print(O);
- }
-#endif
-};
-
-//===----------------------------------------------------------------------===//
-/// DIEntry - A pointer to another debug information entry. An instance of this
-/// class can also be used as a proxy for a debug information entry not yet
-/// defined (ie. types.)
-class DIEntry : public DIEValue {
-public:
- DIE *Entry;
-
- explicit DIEntry(DIE *E) : DIEValue(isEntry), Entry(E) {}
-
- // Implement isa/cast/dyncast.
- static bool classof(const DIEntry *) { return true; }
- static bool classof(const DIEValue *E) { return E->Type == isEntry; }
-
- /// EmitValue - Emit debug information entry offset.
- ///
- virtual void EmitValue(DwarfDebug &DD, unsigned Form);
-
- /// SizeOf - Determine size of debug information entry in bytes.
- ///
- virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const {
- return sizeof(int32_t);
- }
-
- /// Profile - Used to gather unique data for the value folding set.
- ///
- static void Profile(FoldingSetNodeID &ID, DIE *Entry) {
- ID.AddInteger(isEntry);
- ID.AddPointer(Entry);
- }
- virtual void Profile(FoldingSetNodeID &ID) {
- ID.AddInteger(isEntry);
-
- if (Entry) {
- ID.AddPointer(Entry);
- } else {
- ID.AddPointer(this);
- }
- }
-
-#ifndef NDEBUG
- virtual void print(std::ostream &O) {
- O << "Die: 0x" << std::hex << (intptr_t)Entry << std::dec;
- }
-#endif
-};
-
-//===----------------------------------------------------------------------===//
-/// DIEBlock - A block of values. Primarily used for location expressions.
-//
-class DIEBlock : public DIEValue, public DIE {
-public:
- unsigned Size; // Size in bytes excluding size header.
-
- DIEBlock()
- : DIEValue(isBlock)
- , DIE(0)
- , Size(0)
- {}
- ~DIEBlock() {
- }
-
- // Implement isa/cast/dyncast.
- static bool classof(const DIEBlock *) { return true; }
- static bool classof(const DIEValue *E) { return E->Type == isBlock; }
-
- /// ComputeSize - calculate the size of the block.
- ///
- unsigned ComputeSize(DwarfDebug &DD);
-
- /// BestForm - Choose the best form for data.
- ///
- unsigned BestForm() const {
- if ((unsigned char)Size == Size) return DW_FORM_block1;
- if ((unsigned short)Size == Size) return DW_FORM_block2;
- if ((unsigned int)Size == Size) return DW_FORM_block4;
- return DW_FORM_block;
- }
-
- /// EmitValue - Emit block data.
- ///
- virtual void EmitValue(DwarfDebug &DD, unsigned Form);
-
- /// SizeOf - Determine size of block data in bytes.
- ///
- virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const;
-
-
- /// Profile - Used to gather unique data for the value folding set.
- ///
- virtual void Profile(FoldingSetNodeID &ID) {
- ID.AddInteger(isBlock);
- DIE::Profile(ID);
- }
-
-#ifndef NDEBUG
- virtual void print(std::ostream &O) {
- O << "Blk: ";
- DIE::print(O, 5);
- }
-#endif
-};
-
-//===----------------------------------------------------------------------===//
-/// CompileUnit - This dwarf writer support class manages information associate
-/// with a source file.
-class CompileUnit {
-private:
- /// ID - File identifier for source.
- ///
- unsigned ID;
-
- /// Die - Compile unit debug information entry.
- ///
- DIE *Die;
-
- /// GVToDieMap - Tracks the mapping of unit level debug informaton
- /// variables to debug information entries.
- std::map<GlobalVariable *, DIE *> GVToDieMap;
-
- /// GVToDIEntryMap - Tracks the mapping of unit level debug informaton
- /// descriptors to debug information entries using a DIEntry proxy.
- std::map<GlobalVariable *, DIEntry *> GVToDIEntryMap;
-
- /// 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;
-
-public:
- CompileUnit(unsigned I, DIE *D)
- : ID(I), Die(D), GVToDieMap(),
- GVToDIEntryMap(), Globals(), DiesSet(InitDiesSetSize)
- {}
-
- ~CompileUnit() {
- delete Die;
- }
-
- // Accessors.
- 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 variable.
- DIE *&getDieMapSlotFor(GlobalVariable *GV) {
- return GVToDieMap[GV];
- }
-
- /// getDIEntrySlotFor - Returns the debug information entry proxy slot for the
- /// specified debug variable.
- DIEntry *&getDIEntrySlotFor(GlobalVariable *GV) {
- return GVToDIEntryMap[GV];
- }
-
- /// 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.
- ///
- raw_ostream &O;
-
- /// Asm - Target of Dwarf emission.
- ///
- AsmPrinter *Asm;
-
- /// TAI - Target asm information.
- const TargetAsmInfo *TAI;
-
- /// TD - Target data.
- const TargetData *TD;
-
- /// RI - Register Information.
- const TargetRegisterInfo *RI;
-
- /// M - Current module.
- ///
- Module *M;
-
- /// MF - Current machine function.
- ///
- MachineFunction *MF;
-
- /// MMI - Collected machine module information.
- ///
- MachineModuleInfo *MMI;
-
- /// SubprogramCount - The running count of functions being compiled.
- ///
- unsigned SubprogramCount;
-
- /// Flavor - A unique string indicating what dwarf producer this is, used to
- /// unique labels.
- const char * const Flavor;
-
- unsigned SetCounter;
- Dwarf(raw_ostream &OS, AsmPrinter *A, const TargetAsmInfo *T,
- const char *flavor)
- : O(OS)
- , Asm(A)
- , TAI(T)
- , TD(Asm->TM.getTargetData())
- , RI(Asm->TM.getRegisterInfo())
- , M(NULL)
- , MF(NULL)
- , MMI(NULL)
- , SubprogramCount(0)
- , Flavor(flavor)
- , SetCounter(1)
- {
- }
-
-public:
-
- //===--------------------------------------------------------------------===//
- // Accessors.
- //
- AsmPrinter *getAsm() const { return Asm; }
- MachineModuleInfo *getMMI() const { return MMI; }
- const TargetAsmInfo *getTargetAsmInfo() const { return TAI; }
- const TargetData *getTargetData() const { return TD; }
-
- void PrintRelDirective(bool Force32Bit = false, bool isInSection = false)
- const {
- if (isInSection && TAI->getDwarfSectionOffsetDirective())
- O << TAI->getDwarfSectionOffsetDirective();
- else if (Force32Bit || TD->getPointerSize() == sizeof(int32_t))
- O << TAI->getData32bitsDirective();
- else
- O << TAI->getData64bitsDirective();
- }
-
- /// PrintLabelName - Print label name in form used by Dwarf writer.
- ///
- void PrintLabelName(DWLabel Label) const {
- PrintLabelName(Label.Tag, Label.Number);
- }
- void PrintLabelName(const char *Tag, unsigned Number) const {
- O << TAI->getPrivateGlobalPrefix() << Tag;
- if (Number) O << Number;
- }
-
- void PrintLabelName(const char *Tag, unsigned Number,
- const char *Suffix) const {
- O << TAI->getPrivateGlobalPrefix() << Tag;
- if (Number) O << Number;
- O << Suffix;
- }
-
- /// EmitLabel - Emit location label for internal use by Dwarf.
- ///
- void EmitLabel(DWLabel Label) const {
- EmitLabel(Label.Tag, Label.Number);
- }
- void EmitLabel(const char *Tag, unsigned Number) const {
- PrintLabelName(Tag, Number);
- O << ":\n";
- }
-
- /// EmitReference - Emit a reference to a label.
- ///
- void EmitReference(DWLabel Label, bool IsPCRelative = false,
- bool Force32Bit = false) const {
- EmitReference(Label.Tag, Label.Number, IsPCRelative, Force32Bit);
- }
- void EmitReference(const char *Tag, unsigned Number,
- bool IsPCRelative = false, bool Force32Bit = false) const {
- PrintRelDirective(Force32Bit);
- PrintLabelName(Tag, Number);
-
- if (IsPCRelative) O << "-" << TAI->getPCSymbol();
- }
- void EmitReference(const std::string &Name, bool IsPCRelative = false,
- bool Force32Bit = false) const {
- PrintRelDirective(Force32Bit);
-
- O << Name;
-
- if (IsPCRelative) O << "-" << TAI->getPCSymbol();
- }
-
- /// EmitDifference - Emit the difference between two labels. Some
- /// assemblers do not behave with absolute expressions with data directives,
- /// so there is an option (needsSet) to use an intermediary set expression.
- void EmitDifference(DWLabel LabelHi, DWLabel LabelLo,
- bool IsSmall = false) {
- EmitDifference(LabelHi.Tag, LabelHi.Number,
- LabelLo.Tag, LabelLo.Number,
- IsSmall);
- }
- void EmitDifference(const char *TagHi, unsigned NumberHi,
- const char *TagLo, unsigned NumberLo,
- bool IsSmall = false) {
- if (TAI->needsSet()) {
- O << "\t.set\t";
- PrintLabelName("set", SetCounter, Flavor);
- O << ",";
- PrintLabelName(TagHi, NumberHi);
- O << "-";
- PrintLabelName(TagLo, NumberLo);
- O << "\n";
-
- PrintRelDirective(IsSmall);
- PrintLabelName("set", SetCounter, Flavor);
- ++SetCounter;
- } else {
- PrintRelDirective(IsSmall);
-
- PrintLabelName(TagHi, NumberHi);
- O << "-";
- PrintLabelName(TagLo, NumberLo);
- }
- }
-
- void EmitSectionOffset(const char* Label, const char* Section,
- unsigned LabelNumber, unsigned SectionNumber,
- bool IsSmall = false, bool isEH = false,
- bool useSet = true) {
- bool printAbsolute = false;
- if (isEH)
- printAbsolute = TAI->isAbsoluteEHSectionOffsets();
- else
- printAbsolute = TAI->isAbsoluteDebugSectionOffsets();
-
- if (TAI->needsSet() && useSet) {
- O << "\t.set\t";
- PrintLabelName("set", SetCounter, Flavor);
- O << ",";
- PrintLabelName(Label, LabelNumber);
-
- if (!printAbsolute) {
- O << "-";
- PrintLabelName(Section, SectionNumber);
- }
- O << "\n";
-
- PrintRelDirective(IsSmall);
-
- PrintLabelName("set", SetCounter, Flavor);
- ++SetCounter;
- } else {
- PrintRelDirective(IsSmall, true);
-
- PrintLabelName(Label, LabelNumber);
-
- if (!printAbsolute) {
- O << "-";
- PrintLabelName(Section, SectionNumber);
- }
- }
- }
-
- /// EmitFrameMoves - Emit frame instructions to describe the layout of the
- /// frame.
- void EmitFrameMoves(const char *BaseLabel, unsigned BaseLabelID,
- const std::vector<MachineMove> &Moves, bool isEH) {
- int stackGrowth =
- Asm->TM.getFrameInfo()->getStackGrowthDirection() ==
- TargetFrameInfo::StackGrowsUp ?
- TD->getPointerSize() : -TD->getPointerSize();
- bool IsLocal = BaseLabel && strcmp(BaseLabel, "label") == 0;
-
- for (unsigned i = 0, N = Moves.size(); i < N; ++i) {
- const MachineMove &Move = Moves[i];
- unsigned LabelID = Move.getLabelID();
-
- if (LabelID) {
- LabelID = MMI->MappedLabel(LabelID);
-
- // Throw out move if the label is invalid.
- if (!LabelID) continue;
- }
-
- const MachineLocation &Dst = Move.getDestination();
- const MachineLocation &Src = Move.getSource();
-
- // Advance row if new location.
- if (BaseLabel && LabelID && (BaseLabelID != LabelID || !IsLocal)) {
- Asm->EmitInt8(DW_CFA_advance_loc4);
- Asm->EOL("DW_CFA_advance_loc4");
- EmitDifference("label", LabelID, BaseLabel, BaseLabelID, true);
- Asm->EOL();
-
- BaseLabelID = LabelID;
- BaseLabel = "label";
- IsLocal = true;
- }
-
- // If advancing cfa.
- if (Dst.isReg() && Dst.getReg() == MachineLocation::VirtualFP) {
- if (!Src.isReg()) {
- if (Src.getReg() == 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.getReg(), isEH));
- Asm->EOL("Register");
- }
-
- int Offset = -Src.getOffset();
-
- Asm->EmitULEB128Bytes(Offset);
- Asm->EOL("Offset");
- } else {
- assert(0 && "Machine move no supported yet.");
- }
- } else if (Src.isReg() &&
- Src.getReg() == MachineLocation::VirtualFP) {
- if (Dst.isReg()) {
- Asm->EmitInt8(DW_CFA_def_cfa_register);
- Asm->EOL("DW_CFA_def_cfa_register");
- Asm->EmitULEB128Bytes(RI->getDwarfRegNum(Dst.getReg(), isEH));
- Asm->EOL("Register");
- } else {
- assert(0 && "Machine move no supported yet.");
- }
- } else {
- unsigned Reg = RI->getDwarfRegNum(Src.getReg(), isEH);
- int Offset = Dst.getOffset() / stackGrowth;
-
- if (Offset < 0) {
- Asm->EmitInt8(DW_CFA_offset_extended_sf);
- Asm->EOL("DW_CFA_offset_extended_sf");
- Asm->EmitULEB128Bytes(Reg);
- Asm->EOL("Reg");
- Asm->EmitSLEB128Bytes(Offset);
- Asm->EOL("Offset");
- } else if (Reg < 64) {
- Asm->EmitInt8(DW_CFA_offset + Reg);
- if (VerboseAsm)
- Asm->EOL("DW_CFA_offset + Reg (" + utostr(Reg) + ")");
- else
- Asm->EOL();
- Asm->EmitULEB128Bytes(Offset);
- Asm->EOL("Offset");
- } else {
- Asm->EmitInt8(DW_CFA_offset_extended);
- Asm->EOL("DW_CFA_offset_extended");
- Asm->EmitULEB128Bytes(Reg);
- Asm->EOL("Reg");
- Asm->EmitULEB128Bytes(Offset);
- Asm->EOL("Offset");
- }
- }
- }
- }
-
-};
-
-//===----------------------------------------------------------------------===//
-/// SrcLineInfo - This class is used to record source line correspondence.
-///
-class SrcLineInfo {
- unsigned Line; // Source line number.
- unsigned Column; // Source column.
- unsigned SourceID; // Source ID number.
- unsigned LabelID; // Label in code ID number.
-public:
- SrcLineInfo(unsigned L, unsigned C, unsigned S, unsigned I)
- : Line(L), Column(C), SourceID(S), LabelID(I) {}
-
- // Accessors
- unsigned getLine() const { return Line; }
- unsigned getColumn() const { return Column; }
- unsigned getSourceID() const { return SourceID; }
- unsigned getLabelID() const { return LabelID; }
-};
-
-
-//===----------------------------------------------------------------------===//
-/// SrcFileInfo - This class is used to track source information.
-///
-class SrcFileInfo {
- unsigned DirectoryID; // Directory ID number.
- std::string Name; // File name (not including directory.)
-public:
- SrcFileInfo(unsigned D, const std::string &N) : DirectoryID(D), Name(N) {}
-
- // Accessors
- unsigned getDirectoryID() const { return DirectoryID; }
- const std::string &getName() const { return Name; }
-
- /// operator== - Used by UniqueVector to locate entry.
- ///
- bool operator==(const SrcFileInfo &SI) const {
- return getDirectoryID() == SI.getDirectoryID() && getName() == SI.getName();
- }
-
- /// operator< - Used by UniqueVector to locate entry.
- ///
- bool operator<(const SrcFileInfo &SI) const {
- return getDirectoryID() < SI.getDirectoryID() ||
- (getDirectoryID() == SI.getDirectoryID() && getName() < SI.getName());
- }
-};
-
-//===----------------------------------------------------------------------===//
-/// DbgVariable - This class is used to track local variable information.
-///
-class DbgVariable {
-private:
- DIVariable Var; // Variable Descriptor.
- unsigned FrameIndex; // Variable frame index.
-
-public:
- DbgVariable(DIVariable V, unsigned I) : Var(V), FrameIndex(I) {}
-
- // Accessors.
- DIVariable getVariable() const { return Var; }
- unsigned getFrameIndex() const { return FrameIndex; }
-};
-
-//===----------------------------------------------------------------------===//
-/// DbgScope - This class is used to track scope information.
-///
-class DbgScope {
-private:
- DbgScope *Parent; // Parent to this scope.
- DIDescriptor Desc; // Debug info descriptor for scope.
- // Either subprogram or block.
- unsigned StartLabelID; // Label ID of the beginning of scope.
- unsigned EndLabelID; // Label ID of the end of scope.
- SmallVector<DbgScope *, 4> Scopes; // Scopes defined in scope.
- SmallVector<DbgVariable *, 8> Variables;// Variables declared in scope.
-
-public:
- DbgScope(DbgScope *P, DIDescriptor D)
- : Parent(P), Desc(D), StartLabelID(0), EndLabelID(0), Scopes(), Variables()
- {}
- ~DbgScope() {
- for (unsigned i = 0, N = Scopes.size(); i < N; ++i) delete Scopes[i];
- for (unsigned j = 0, M = Variables.size(); j < M; ++j) delete Variables[j];
- }
-
- // Accessors.
- DbgScope *getParent() const { return Parent; }
- DIDescriptor getDesc() const { return Desc; }
- unsigned getStartLabelID() const { return StartLabelID; }
- unsigned getEndLabelID() const { return EndLabelID; }
- SmallVector<DbgScope *, 4> &getScopes() { return Scopes; }
- SmallVector<DbgVariable *, 8> &getVariables() { return Variables; }
- void setStartLabelID(unsigned S) { StartLabelID = S; }
- void setEndLabelID(unsigned E) { EndLabelID = E; }
-
- /// AddScope - Add a scope to the scope.
- ///
- void AddScope(DbgScope *S) { Scopes.push_back(S); }
-
- /// AddVariable - Add a variable to the scope.
- ///
- void AddVariable(DbgVariable *V) { Variables.push_back(V); }
-};
-
-//===----------------------------------------------------------------------===//
-/// DwarfDebug - Emits Dwarf debug directives.
-///
-class DwarfDebug : public Dwarf {
-
-private:
- //===--------------------------------------------------------------------===//
- // Attributes used to construct specific Dwarf sections.
- //
-
- /// DW_CUs - All the compile units involved in this build. The index
- /// of each entry in this vector corresponds to the sources in MMI.
- DenseMap<Value *, CompileUnit *> DW_CUs;
-
- /// AbbreviationsSet - Used to uniquely define abbreviations.
- ///
- FoldingSet<DIEAbbrev> AbbreviationsSet;
-
- /// Abbreviations - A list of all the unique abbreviations in use.
- ///
- std::vector<DIEAbbrev *> Abbreviations;
-
- /// Directories - Uniquing vector for directories.
- UniqueVector<std::string> Directories;
-
- /// SourceFiles - Uniquing vector for source files.
- UniqueVector<SrcFileInfo> SrcFiles;
-
- /// Lines - List of of source line correspondence.
- std::vector<SrcLineInfo> Lines;
-
- /// 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;
-
- /// SectionMap - Provides a unique id per text section.
- ///
- UniqueVector<const Section*> SectionMap;
-
- /// SectionSourceLines - Tracks line numbers per text section.
- ///
- std::vector<std::vector<SrcLineInfo> > 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;
-
- // RootDbgScope - Top level scope for the current function.
- //
- DbgScope *RootDbgScope;
-
- // DbgScopeMap - Tracks the scopes in the current function.
- DenseMap<GlobalVariable *, DbgScope *> DbgScopeMap;
-
- struct FunctionDebugFrameInfo {
- unsigned Number;
- std::vector<MachineMove> Moves;
-
- FunctionDebugFrameInfo(unsigned Num, const std::vector<MachineMove> &M):
- Number(Num), Moves(M) { }
- };
-
- std::vector<FunctionDebugFrameInfo> DebugFrames;
-
-public:
-
- /// ShouldEmitDwarf - Returns true if Dwarf declarations should be made.
- ///
- bool ShouldEmitDwarf() const { return shouldEmit; }
-
- /// AssignAbbrevNumber - Define a unique number for the abbreviation.
- ///
- void AssignAbbrevNumber(DIEAbbrev &Abbrev) {
- // Profile the node so that we can make it unique.
- FoldingSetNodeID ID;
- Abbrev.Profile(ID);
-
- // Check the set for priors.
- DIEAbbrev *InSet = AbbreviationsSet.GetOrInsertNode(&Abbrev);
-
- // If it's newly added.
- if (InSet == &Abbrev) {
- // Add to abbreviation list.
- Abbreviations.push_back(&Abbrev);
- // Assign the vector position + 1 as its number.
- Abbrev.setNumber(Abbreviations.size());
- } else {
- // Assign existing abbreviation number.
- Abbrev.setNumber(InSet->getNumber());
- }
- }
-
- /// NewString - Add a string to the constant pool and returns a label.
- ///
- DWLabel NewString(const std::string &String) {
- unsigned StringID = StringPool.insert(String);
- return DWLabel("string", StringID);
- }
-
- /// NewDIEntry - Creates a new DIEntry to be a proxy for a debug information
- /// entry.
- DIEntry *NewDIEntry(DIE *Entry = NULL) {
- DIEntry *Value;
-
- if (Entry) {
- FoldingSetNodeID ID;
- DIEntry::Profile(ID, Entry);
- void *Where;
- Value = static_cast<DIEntry *>(ValuesSet.FindNodeOrInsertPos(ID, Where));
-
- if (Value) return Value;
-
- Value = new DIEntry(Entry);
- ValuesSet.InsertNode(Value, Where);
- } else {
- Value = new DIEntry(Entry);
- }
-
- Values.push_back(Value);
- return Value;
- }
-
- /// SetDIEntry - Set a DIEntry once the debug information entry is defined.
- ///
- void SetDIEntry(DIEntry *Value, DIE *Entry) {
- Value->Entry = Entry;
- // Add to values set if not already there. If it is, we merely have a
- // duplicate in the values list (no harm.)
- ValuesSet.GetOrInsertNode(Value);
- }
-
- /// AddUInt - Add an unsigned integer attribute data and value.
- ///
- void AddUInt(DIE *Die, unsigned Attribute, unsigned Form, uint64_t Integer) {
- if (!Form) Form = DIEInteger::BestForm(false, Integer);
-
- FoldingSetNodeID ID;
- DIEInteger::Profile(ID, Integer);
- void *Where;
- DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
- if (!Value) {
- Value = new DIEInteger(Integer);
- ValuesSet.InsertNode(Value, Where);
- Values.push_back(Value);
- }
-
- Die->AddValue(Attribute, Form, Value);
- }
-
- /// AddSInt - Add an signed integer attribute data and value.
- ///
- void AddSInt(DIE *Die, unsigned Attribute, unsigned Form, int64_t Integer) {
- if (!Form) Form = DIEInteger::BestForm(true, Integer);
-
- FoldingSetNodeID ID;
- DIEInteger::Profile(ID, (uint64_t)Integer);
- void *Where;
- DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
- if (!Value) {
- Value = new DIEInteger(Integer);
- ValuesSet.InsertNode(Value, Where);
- Values.push_back(Value);
- }
-
- Die->AddValue(Attribute, Form, Value);
- }
-
- /// AddString - Add a std::string attribute data and value.
- ///
- void AddString(DIE *Die, unsigned Attribute, unsigned Form,
- const std::string &String) {
- FoldingSetNodeID ID;
- DIEString::Profile(ID, String);
- void *Where;
- DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
- if (!Value) {
- Value = new DIEString(String);
- ValuesSet.InsertNode(Value, Where);
- Values.push_back(Value);
- }
-
- Die->AddValue(Attribute, Form, Value);
- }
-
- /// AddLabel - Add a Dwarf label attribute data and value.
- ///
- void AddLabel(DIE *Die, unsigned Attribute, unsigned Form,
- const DWLabel &Label) {
- FoldingSetNodeID ID;
- DIEDwarfLabel::Profile(ID, Label);
- void *Where;
- DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
- if (!Value) {
- Value = new DIEDwarfLabel(Label);
- ValuesSet.InsertNode(Value, Where);
- Values.push_back(Value);
- }
-
- Die->AddValue(Attribute, Form, Value);
- }
-
- /// AddObjectLabel - Add an non-Dwarf label attribute data and value.
- ///
- void AddObjectLabel(DIE *Die, unsigned Attribute, unsigned Form,
- const std::string &Label) {
- FoldingSetNodeID ID;
- DIEObjectLabel::Profile(ID, Label);
- void *Where;
- DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
- if (!Value) {
- Value = new DIEObjectLabel(Label);
- ValuesSet.InsertNode(Value, Where);
- Values.push_back(Value);
- }
-
- Die->AddValue(Attribute, Form, Value);
- }
-
- /// AddSectionOffset - Add a section offset label attribute data and value.
- ///
- void AddSectionOffset(DIE *Die, unsigned Attribute, unsigned Form,
- const DWLabel &Label, const DWLabel &Section,
- bool isEH = false, bool useSet = true) {
- FoldingSetNodeID ID;
- DIESectionOffset::Profile(ID, Label, Section);
- void *Where;
- DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
- if (!Value) {
- Value = new DIESectionOffset(Label, Section, isEH, useSet);
- ValuesSet.InsertNode(Value, Where);
- Values.push_back(Value);
- }
-
- Die->AddValue(Attribute, Form, Value);
- }
-
- /// AddDelta - Add a label delta attribute data and value.
- ///
- void AddDelta(DIE *Die, unsigned Attribute, unsigned Form,
- const DWLabel &Hi, const DWLabel &Lo) {
- FoldingSetNodeID ID;
- DIEDelta::Profile(ID, Hi, Lo);
- void *Where;
- DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
- if (!Value) {
- Value = new DIEDelta(Hi, Lo);
- ValuesSet.InsertNode(Value, Where);
- Values.push_back(Value);
- }
-
- Die->AddValue(Attribute, Form, Value);
- }
-
- /// AddDIEntry - Add a DIE attribute data and value.
- ///
- void AddDIEntry(DIE *Die, unsigned Attribute, unsigned Form, DIE *Entry) {
- Die->AddValue(Attribute, Form, NewDIEntry(Entry));
- }
-
- /// AddBlock - Add block data.
- ///
- void AddBlock(DIE *Die, unsigned Attribute, unsigned Form, DIEBlock *Block) {
- Block->ComputeSize(*this);
- FoldingSetNodeID ID;
- Block->Profile(ID);
- void *Where;
- DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
- if (!Value) {
- Value = Block;
- ValuesSet.InsertNode(Value, Where);
- Values.push_back(Value);
- } else {
- // Already exists, reuse the previous one.
- delete Block;
- Block = cast<DIEBlock>(Value);
- }
-
- Die->AddValue(Attribute, Block->BestForm(), Value);
- }
-
-private:
-
- /// AddSourceLine - Add location information to specified debug information
- /// entry.
- void AddSourceLine(DIE *Die, const DIVariable *V) {
- unsigned FileID = 0;
- unsigned Line = V->getLineNumber();
- if (V->getVersion() <= LLVMDebugVersion6) {
- // Version6 or earlier. Use compile unit info to get file id.
- CompileUnit *Unit = FindCompileUnit(V->getCompileUnit());
- FileID = Unit->getID();
- } else {
- // Version7 or newer, use filename and directory info from DIVariable
- // directly.
- unsigned DID = Directories.idFor(V->getDirectory());
- FileID = SrcFiles.idFor(SrcFileInfo(DID, V->getFilename()));
- }
- AddUInt(Die, DW_AT_decl_file, 0, FileID);
- AddUInt(Die, DW_AT_decl_line, 0, Line);
- }
-
- /// AddSourceLine - Add location information to specified debug information
- /// entry.
- void AddSourceLine(DIE *Die, const DIGlobal *G) {
- unsigned FileID = 0;
- unsigned Line = G->getLineNumber();
- if (G->getVersion() < LLVMDebugVersion6) {
- // Version6 or earlier. Use compile unit info to get file id.
- CompileUnit *Unit = FindCompileUnit(G->getCompileUnit());
- FileID = Unit->getID();
- } else {
- // Version7 or newer, use filename and directory info from DIGlobal
- // directly.
- unsigned DID = Directories.idFor(G->getDirectory());
- FileID = SrcFiles.idFor(SrcFileInfo(DID, G->getFilename()));
- }
- AddUInt(Die, DW_AT_decl_file, 0, FileID);
- AddUInt(Die, DW_AT_decl_line, 0, Line);
- }
-
- void AddSourceLine(DIE *Die, const DIType *Ty) {
- unsigned FileID = 0;
- unsigned Line = Ty->getLineNumber();
- if (Ty->getVersion() <= LLVMDebugVersion6) {
- // Version6 or earlier. Use compile unit info to get file id.
- CompileUnit *Unit = FindCompileUnit(Ty->getCompileUnit());
- FileID = Unit->getID();
- } else {
- // Version7 or newer, use filename and directory info from DIType
- // directly.
- unsigned DID = Directories.idFor(Ty->getDirectory());
- FileID = SrcFiles.idFor(SrcFileInfo(DID, Ty->getFilename()));
- }
- 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.getReg(), false);
- DIEBlock *Block = new DIEBlock();
-
- if (Location.isReg()) {
- 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 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);
- DIE *BasicTypeDie = Unit->AddDie(Buffer);
- AddDIEntry(Entity, DW_AT_type, DW_FORM_ref4, BasicTypeDie);
- }
-
- /// AddPointerType - Add a new pointer type attribute to the specified entity.
- ///
- void AddPointerType(DIE *Entity, CompileUnit *Unit, const std::string &Name) {
- DIE Buffer(DW_TAG_pointer_type);
- AddUInt(&Buffer, DW_AT_byte_size, 0, TD->getPointerSize());
- if (!Name.empty()) AddString(&Buffer, DW_AT_name, DW_FORM_string, Name);
- DIE *PointerTypeDie = Unit->AddDie(Buffer);
- AddDIEntry(Entity, DW_AT_type, DW_FORM_ref4, PointerTypeDie);
- }
-
- /// AddType - Add a new type attribute to the specified entity.
- void AddType(CompileUnit *DW_Unit, DIE *Entity, DIType Ty) {
- if (Ty.isNull()) {
- AddBasicType(Entity, DW_Unit, "", DW_ATE_signed, sizeof(int32_t));
- return;
- }
-
- // Check for pre-existence.
- DIEntry *&Slot = DW_Unit->getDIEntrySlotFor(Ty.getGV());
- // If it exists then use the existing value.
- if (Slot) {
- Entity->AddValue(DW_AT_type, DW_FORM_ref4, Slot);
- return;
- }
-
- // Set up proxy.
- Slot = NewDIEntry();
-
- // Construct type.
- DIE Buffer(DW_TAG_base_type);
- if (Ty.isBasicType(Ty.getTag()))
- ConstructTypeDIE(DW_Unit, Buffer, DIBasicType(Ty.getGV()));
- else if (Ty.isDerivedType(Ty.getTag()))
- ConstructTypeDIE(DW_Unit, Buffer, DIDerivedType(Ty.getGV()));
- else {
- assert (Ty.isCompositeType(Ty.getTag()) && "Unknown kind of DIType");
- ConstructTypeDIE(DW_Unit, Buffer, DICompositeType(Ty.getGV()));
- }
-
- // Add debug information entry to entity and unit.
- DIE *Die = DW_Unit->AddDie(Buffer);
- SetDIEntry(Slot, Die);
- Entity->AddValue(DW_AT_type, DW_FORM_ref4, Slot);
- }
-
- /// ConstructTypeDIE - Construct basic type die from DIBasicType.
- void ConstructTypeDIE(CompileUnit *DW_Unit, DIE &Buffer,
- DIBasicType BTy) {
-
- // Get core information.
- const std::string &Name = BTy.getName();
- Buffer.setTag(DW_TAG_base_type);
- AddUInt(&Buffer, DW_AT_encoding, DW_FORM_data1, BTy.getEncoding());
- // Add name if not anonymous or intermediate type.
- if (!Name.empty())
- AddString(&Buffer, DW_AT_name, DW_FORM_string, Name);
- uint64_t Size = BTy.getSizeInBits() >> 3;
- AddUInt(&Buffer, DW_AT_byte_size, 0, Size);
- }
-
- /// ConstructTypeDIE - Construct derived type die from DIDerivedType.
- void ConstructTypeDIE(CompileUnit *DW_Unit, DIE &Buffer,
- DIDerivedType DTy) {
-
- // Get core information.
- const std::string &Name = DTy.getName();
- uint64_t Size = DTy.getSizeInBits() >> 3;
- unsigned Tag = DTy.getTag();
- // FIXME - Workaround for templates.
- if (Tag == DW_TAG_inheritance) Tag = DW_TAG_reference_type;
-
- Buffer.setTag(Tag);
- // Map to main type, void will not have a type.
- DIType FromTy = DTy.getTypeDerivedFrom();
- AddType(DW_Unit, &Buffer, FromTy);
-
- // Add name if not anonymous or intermediate type.
- if (!Name.empty()) AddString(&Buffer, DW_AT_name, DW_FORM_string, Name);
-
- // Add size if non-zero (derived types might be zero-sized.)
- if (Size)
- AddUInt(&Buffer, DW_AT_byte_size, 0, Size);
-
- // Add source line info if available and TyDesc is not a forward
- // declaration.
- // FIXME - Enable this. if (!DTy.isForwardDecl())
- // FIXME - Enable this. AddSourceLine(&Buffer, *DTy);
- }
-
- /// ConstructTypeDIE - Construct type DIE from DICompositeType.
- void ConstructTypeDIE(CompileUnit *DW_Unit, DIE &Buffer,
- DICompositeType CTy) {
-
- // Get core information.
- const std::string &Name = CTy.getName();
- uint64_t Size = CTy.getSizeInBits() >> 3;
- unsigned Tag = CTy.getTag();
- switch (Tag) {
- case DW_TAG_vector_type:
- case DW_TAG_array_type:
- ConstructArrayTypeDIE(DW_Unit, Buffer, &CTy);
- break;
- case DW_TAG_enumeration_type:
- {
- DIArray Elements = CTy.getTypeArray();
- // Add enumerators to enumeration type.
- for (unsigned i = 0, N = Elements.getNumElements(); i < N; ++i) {
- DIE *ElemDie = NULL;
- DIEnumerator Enum(Elements.getElement(i).getGV());
- ElemDie = ConstructEnumTypeDIE(DW_Unit, &Enum);
- Buffer.AddChild(ElemDie);
- }
- }
- break;
- case DW_TAG_subroutine_type:
- {
- // Add prototype flag.
- AddUInt(&Buffer, DW_AT_prototyped, DW_FORM_flag, 1);
- DIArray Elements = CTy.getTypeArray();
- // Add return type.
- DIDescriptor RTy = Elements.getElement(0);
- AddType(DW_Unit, &Buffer, DIType(RTy.getGV()));
-
- // Add arguments.
- for (unsigned i = 1, N = Elements.getNumElements(); i < N; ++i) {
- DIE *Arg = new DIE(DW_TAG_formal_parameter);
- DIDescriptor Ty = Elements.getElement(i);
- AddType(DW_Unit, Arg, DIType(Ty.getGV()));
- Buffer.AddChild(Arg);
- }
- }
- break;
- case DW_TAG_structure_type:
- case DW_TAG_union_type:
- {
- // Add elements to structure type.
- DIArray Elements = CTy.getTypeArray();
-
- // A forward struct declared type may not have elements available.
- if (Elements.isNull())
- break;
-
- // Add elements to structure type.
- for (unsigned i = 0, N = Elements.getNumElements(); i < N; ++i) {
- DIDescriptor Element = Elements.getElement(i);
- DIE *ElemDie = NULL;
- if (Element.getTag() == dwarf::DW_TAG_subprogram)
- ElemDie = CreateSubprogramDIE(DW_Unit,
- DISubprogram(Element.getGV()));
- else if (Element.getTag() == dwarf::DW_TAG_variable) // ???
- ElemDie = CreateGlobalVariableDIE(DW_Unit,
- DIGlobalVariable(Element.getGV()));
- else {
- DIDerivedType DT = DIDerivedType(Element.getGV());
- assert (DT.isDerivedType(DT.getTag())
- && "Unexpected struct element type");
- ElemDie = new DIE(DT.getTag());
- AddType(DW_Unit, ElemDie, DT);
- }
- Buffer.AddChild(ElemDie);
- }
- }
- break;
- default:
- break;
- }
-
- // Add name if not anonymous or intermediate type.
- if (!Name.empty()) AddString(&Buffer, DW_AT_name, DW_FORM_string, Name);
-
- // Add size if non-zero (derived types might be zero-sized.)
- if (Size)
- AddUInt(&Buffer, DW_AT_byte_size, 0, Size);
- else {
- // Add zero size even if it is not a forward declaration.
- // FIXME - Enable this.
- // if (!CTy.isDefinition())
- // AddUInt(&Buffer, DW_AT_declaration, DW_FORM_flag, 1);
- // else
- // AddUInt(&Buffer, DW_AT_byte_size, 0, 0);
- }
-
- // Add source line info if available and TyDesc is not a forward
- // declaration.
- // FIXME - Enable this.
- // if (CTy.isForwardDecl())
- // AddSourceLine(&Buffer, *CTy);
- }
-
- // ConstructSubrangeDIE - Construct subrange DIE from DISubrange.
- void ConstructSubrangeDIE (DIE &Buffer, DISubrange SR, DIE *IndexTy) {
- int64_t L = SR.getLo();
- int64_t H = SR.getHi();
- DIE *DW_Subrange = new DIE(DW_TAG_subrange_type);
- if (L != H) {
- AddDIEntry(DW_Subrange, DW_AT_type, DW_FORM_ref4, IndexTy);
- if (L)
- AddSInt(DW_Subrange, DW_AT_lower_bound, 0, L);
- AddSInt(DW_Subrange, DW_AT_upper_bound, 0, H);
- }
- Buffer.AddChild(DW_Subrange);
- }
-
- /// ConstructArrayTypeDIE - Construct array type DIE from DICompositeType.
- void ConstructArrayTypeDIE(CompileUnit *DW_Unit, DIE &Buffer,
- DICompositeType *CTy) {
- Buffer.setTag(DW_TAG_array_type);
- if (CTy->getTag() == DW_TAG_vector_type)
- AddUInt(&Buffer, DW_AT_GNU_vector, DW_FORM_flag, 1);
-
- DIArray Elements = CTy->getTypeArray();
- AddType(DW_Unit, &Buffer, CTy->getTypeDerivedFrom());
-
- // Construct an anonymous type for index type.
- DIE IdxBuffer(DW_TAG_base_type);
- AddUInt(&IdxBuffer, DW_AT_byte_size, 0, sizeof(int32_t));
- AddUInt(&IdxBuffer, DW_AT_encoding, DW_FORM_data1, DW_ATE_signed);
- DIE *IndexTy = DW_Unit->AddDie(IdxBuffer);
-
- // Add subranges to array type.
- for (unsigned i = 0, N = Elements.getNumElements(); i < N; ++i) {
- DIDescriptor Element = Elements.getElement(i);
- if (Element.getTag() == dwarf::DW_TAG_subrange_type)
- ConstructSubrangeDIE(Buffer, DISubrange(Element.getGV()), IndexTy);
- }
- }
-
- /// ConstructEnumTypeDIE - Construct enum type DIE from
- /// DIEnumerator.
- DIE *ConstructEnumTypeDIE(CompileUnit *DW_Unit, DIEnumerator *ETy) {
-
- DIE *Enumerator = new DIE(DW_TAG_enumerator);
- AddString(Enumerator, DW_AT_name, DW_FORM_string, ETy->getName());
- int64_t Value = ETy->getEnumValue();
- AddSInt(Enumerator, DW_AT_const_value, DW_FORM_sdata, Value);
- return Enumerator;
- }
-
- /// CreateGlobalVariableDIE - Create new DIE using GV.
- DIE *CreateGlobalVariableDIE(CompileUnit *DW_Unit, const DIGlobalVariable &GV)
- {
- DIE *GVDie = new DIE(DW_TAG_variable);
- AddString(GVDie, DW_AT_name, DW_FORM_string, GV.getName());
- const std::string &LinkageName = GV.getLinkageName();
- if (!LinkageName.empty())
- AddString(GVDie, DW_AT_MIPS_linkage_name, DW_FORM_string, LinkageName);
- AddType(DW_Unit, GVDie, GV.getType());
- if (!GV.isLocalToUnit())
- AddUInt(GVDie, DW_AT_external, DW_FORM_flag, 1);
- AddSourceLine(GVDie, &GV);
- return GVDie;
- }
-
- /// CreateSubprogramDIE - Create new DIE using SP.
- DIE *CreateSubprogramDIE(CompileUnit *DW_Unit,
- const DISubprogram &SP,
- bool IsConstructor = false) {
- DIE *SPDie = new DIE(DW_TAG_subprogram);
- AddString(SPDie, DW_AT_name, DW_FORM_string, SP.getName());
- const std::string &LinkageName = SP.getLinkageName();
- if (!LinkageName.empty())
- AddString(SPDie, DW_AT_MIPS_linkage_name, DW_FORM_string,
- LinkageName);
- AddSourceLine(SPDie, &SP);
-
- DICompositeType SPTy = SP.getType();
- DIArray Args = SPTy.getTypeArray();
-
- // Add Return Type.
- if (!IsConstructor)
- AddType(DW_Unit, SPDie, DIType(Args.getElement(0).getGV()));
-
- // Add arguments.
- if (!Args.isNull())
- for (unsigned i = 1, N = Args.getNumElements(); i < N; ++i) {
- DIE *Arg = new DIE(DW_TAG_formal_parameter);
- AddType(DW_Unit, Arg, DIType(Args.getElement(i).getGV()));
- AddUInt(Arg, DW_AT_artificial, DW_FORM_flag, 1); // ???
- SPDie->AddChild(Arg);
- }
-
- if (!SP.isLocalToUnit())
- AddUInt(SPDie, DW_AT_external, DW_FORM_flag, 1);
- return SPDie;
- }
-
- /// FindCompileUnit - Get the compile unit for the given descriptor.
- ///
- CompileUnit *FindCompileUnit(DICompileUnit Unit) {
- CompileUnit *DW_Unit = DW_CUs[Unit.getGV()];
- assert(DW_Unit && "Missing compile unit.");
- return DW_Unit;
- }
-
- /// NewDbgScopeVariable - Create a new scope variable.
- ///
- DIE *NewDbgScopeVariable(DbgVariable *DV, CompileUnit *Unit) {
- // Get the descriptor.
- const DIVariable &VD = DV->getVariable();
-
- // 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);
-
- // Add variable type.
- AddType(Unit, VariableDie, VD.getType());
-
- // Add variable address.
- MachineLocation Location;
- Location.set(RI->getFrameRegister(*MF),
- RI->getFrameIndexOffset(*MF, DV->getFrameIndex()));
- AddAddress(VariableDie, DW_AT_location, Location);
-
- return VariableDie;
- }
-
- /// getOrCreateScope - Returns the scope associated with the given descriptor.
- ///
- DbgScope *getOrCreateScope(GlobalVariable *V) {
- DbgScope *&Slot = DbgScopeMap[V];
- if (!Slot) {
- // FIXME - breaks down when the context is an inlined function.
- DIDescriptor ParentDesc;
- DIDescriptor Desc(V);
- if (Desc.getTag() == dwarf::DW_TAG_lexical_block) {
- DIBlock Block(V);
- ParentDesc = Block.getContext();
- }
- DbgScope *Parent = ParentDesc.isNull() ?
- NULL : getOrCreateScope(ParentDesc.getGV());
- Slot = new DbgScope(Parent, Desc);
- if (Parent) {
- Parent->AddScope(Slot);
- } else if (RootDbgScope) {
- // FIXME - Add inlined function scopes to the root so we can delete
- // them later. Long term, handle inlined functions properly.
- RootDbgScope->AddScope(Slot);
- } else {
- // First function is top level function.
- RootDbgScope = Slot;
- }
- }
- return Slot;
- }
-
- /// ConstructDbgScope - Construct the components of a scope.
- ///
- void ConstructDbgScope(DbgScope *ParentScope,
- unsigned ParentStartID, unsigned ParentEndID,
- DIE *ParentDie, CompileUnit *Unit) {
- // Add variables to scope.
- SmallVector<DbgVariable *, 8> &Variables = ParentScope->getVariables();
- for (unsigned i = 0, N = Variables.size(); i < N; ++i) {
- DIE *VariableDie = NewDbgScopeVariable(Variables[i], Unit);
- if (VariableDie) ParentDie->AddChild(VariableDie);
- }
-
- // Add nested scopes.
- SmallVector<DbgScope *, 4> &Scopes = ParentScope->getScopes();
- for (unsigned j = 0, M = Scopes.size(); j < M; ++j) {
- // Define the Scope debug information entry.
- DbgScope *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.
- ConstructDbgScope(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.
- ConstructDbgScope(Scope, StartID, EndID, ScopeDie, Unit);
- ParentDie->AddChild(ScopeDie);
- }
- }
- }
-
- /// ConstructRootDbgScope - Construct the scope for the subprogram.
- ///
- void ConstructRootDbgScope(DbgScope *RootScope) {
- // Exit if there is no root scope.
- if (!RootScope) return;
- DIDescriptor Desc = RootScope->getDesc();
- if (Desc.isNull())
- return;
-
- // Get the subprogram debug information entry.
- DISubprogram SPD(Desc.getGV());
-
- // Get the compile unit context.
- CompileUnit *Unit = FindCompileUnit(SPD.getCompileUnit());
-
- // Get the subprogram die.
- DIE *SPDie = Unit->getDieMapSlotFor(SPD.getGV());
- 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);
-
- ConstructDbgScope(RootScope, 0, 0, SPDie, Unit);
- }
-
- /// ConstructDefaultDbgScope - Construct a default scope for the subprogram.
- ///
- void ConstructDefaultDbgScope(MachineFunction *MF) {
- // Find the correct subprogram descriptor.
- std::string SPName = "llvm.dbg.subprograms";
- std::vector<GlobalVariable*> Result;
- getGlobalVariablesUsing(*M, SPName, Result);
- for (std::vector<GlobalVariable *>::iterator I = Result.begin(),
- E = Result.end(); I != E; ++I) {
-
- DISubprogram SPD(*I);
-
- if (SPD.getName() == MF->getFunction()->getName()) {
- // Get the compile unit context.
- CompileUnit *Unit = FindCompileUnit(SPD.getCompileUnit());
-
- // Get the subprogram die.
- DIE *SPDie = Unit->getDieMapSlotFor(SPD.getGV());
- 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);
- return;
- }
- }
-#if 0
- // FIXME: This is causing an abort because C++ mangled names are compared
- // with their unmangled counterparts. See PR2885. Don't do this assert.
- assert(0 && "Couldn't find DIE for machine function!");
-#endif
- }
-
- /// 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->SwitchToSection(TAI->getTextSection());
- EmitLabel("text_begin", 0);
- Asm->SwitchToSection(TAI->getDataSection());
- EmitLabel("data_begin", 0);
- }
-
- /// EmitDIE - Recusively Emits a debug information entry.
- ///
- void EmitDIE(DIE *Die) {
- // Get the abbreviation for this DIE.
- unsigned AbbrevNumber = Die->getAbbrevNumber();
- const DIEAbbrev *Abbrev = Abbreviations[AbbrevNumber - 1];
-
- Asm->EOL();
-
- // Emit the code (index) for the abbreviation.
- Asm->EmitULEB128Bytes(AbbrevNumber);
-
- if (VerboseAsm)
- Asm->EOL(std::string("Abbrev [" +
- utostr(AbbrevNumber) +
- "] 0x" + utohexstr(Die->getOffset()) +
- ":0x" + utohexstr(Die->getSize()) + " " +
- TagString(Abbrev->getTag())));
- else
- Asm->EOL();
-
- SmallVector<DIEValue*, 32> &Values = Die->getValues();
- const SmallVector<DIEAbbrevData, 8> &AbbrevData = Abbrev->getData();
-
- // Emit the DIE attribute values.
- for (unsigned i = 0, N = Values.size(); i < N; ++i) {
- unsigned Attr = AbbrevData[i].getAttribute();
- unsigned Form = AbbrevData[i].getForm();
- assert(Form && "Too many attributes for DIE (check abbreviation)");
-
- switch (Attr) {
- case DW_AT_sibling: {
- Asm->EmitInt32(Die->SiblingOffset());
- break;
- }
- default: {
- // Emit an attribute using the defined form.
- Values[i]->EmitValue(*this, Form);
- break;
- }
- }
-
- Asm->EOL(AttributeString(Attr));
- }
-
- // Emit the DIE children if any.
- if (Abbrev->getChildrenFlag() == DW_CHILDREN_yes) {
- const std::vector<DIE *> &Children = Die->getChildren();
-
- for (unsigned j = 0, M = Children.size(); j < M; ++j) {
- EmitDIE(Children[j]);
- }
-
- Asm->EmitInt8(0); Asm->EOL("End Of Children Mark");
- }
- }
-
- /// SizeAndOffsetDie - Compute the size and offset of a DIE.
- ///
- unsigned SizeAndOffsetDie(DIE *Die, unsigned Offset, bool Last) {
- // Get the children.
- const std::vector<DIE *> &Children = Die->getChildren();
-
- // If not last sibling and has children then add sibling offset attribute.
- if (!Last && !Children.empty()) Die->AddSiblingOffset();
-
- // Record the abbreviation.
- AssignAbbrevNumber(Die->getAbbrev());
-
- // Get the abbreviation for this DIE.
- unsigned AbbrevNumber = Die->getAbbrevNumber();
- const DIEAbbrev *Abbrev = Abbreviations[AbbrevNumber - 1];
-
- // Set DIE offset
- Die->setOffset(Offset);
-
- // Start the size with the size of abbreviation code.
- Offset += TargetAsmInfo::getULEB128Size(AbbrevNumber);
-
- const SmallVector<DIEValue*, 32> &Values = Die->getValues();
- const SmallVector<DIEAbbrevData, 8> &AbbrevData = Abbrev->getData();
-
- // Size the DIE attribute values.
- for (unsigned i = 0, N = Values.size(); i < N; ++i) {
- // Size attribute value.
- Offset += Values[i]->SizeOf(*this, AbbrevData[i].getForm());
- }
-
- // Size the DIE children if any.
- if (!Children.empty()) {
- assert(Abbrev->getChildrenFlag() == DW_CHILDREN_yes &&
- "Children flag not set");
-
- for (unsigned j = 0, M = Children.size(); j < M; ++j) {
- Offset = SizeAndOffsetDie(Children[j], Offset, (j + 1) == M);
- }
-
- // End of children marker.
- Offset += sizeof(int8_t);
- }
-
- Die->setSize(Offset - Die->getOffset());
- return Offset;
- }
-
- /// SizeAndOffsets - Compute the size and offset of all the DIEs.
- ///
- void SizeAndOffsets() {
- // Process base compile unit.
- for (DenseMap<Value *, CompileUnit *>::iterator CI = DW_CUs.begin(),
- CE = DW_CUs.end(); CI != CE; ++CI) {
- CompileUnit *Unit = CI->second;
- // 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());
-
- for (DenseMap<Value *, CompileUnit *>::iterator CI = DW_CUs.begin(),
- CE = DW_CUs.end(); CI != CE; ++CI) {
- CompileUnit *Unit = CI->second;
- DIE *Die = Unit->getDie();
- // Emit the compile units header.
- EmitLabel("info_begin", Unit->getID());
- // Emit size of content not including length itself
- unsigned ContentSize = Die->getSize() +
- sizeof(int16_t) + // DWARF version number
- sizeof(int32_t) + // Offset Into Abbrev. Section
- sizeof(int8_t) + // Pointer Size (in bytes)
- sizeof(int32_t); // FIXME - extra pad for gdb bug.
-
- Asm->EmitInt32(ContentSize); Asm->EOL("Length of Compilation Unit Info");
- Asm->EmitInt16(DWARF_VERSION); Asm->EOL("DWARF version number");
- EmitSectionOffset("abbrev_begin", "section_abbrev", 0, 0, true, false);
- Asm->EOL("Offset Into Abbrev. Section");
- Asm->EmitInt8(TD->getPointerSize()); Asm->EOL("Address Size (in bytes)");
-
- EmitDIE(Die);
- // FIXME - extra padding for gdb bug.
- Asm->EmitInt8(0); Asm->EOL("Extra Pad For GDB");
- Asm->EmitInt8(0); Asm->EOL("Extra Pad For GDB");
- Asm->EmitInt8(0); Asm->EOL("Extra Pad For GDB");
- Asm->EmitInt8(0); Asm->EOL("Extra Pad For GDB");
- EmitLabel("info_end", Unit->getID());
-
- Asm->EOL();
- }
- }
-
- /// EmitAbbreviations - Emit the abbreviation section.
- ///
- void EmitAbbreviations() const {
- // Check to see if it is worth the effort.
- if (!Abbreviations.empty()) {
- // Start the debug abbrev section.
- Asm->SwitchToDataSection(TAI->getDwarfAbbrevSection());
-
- EmitLabel("abbrev_begin", 0);
-
- // For each abbrevation.
- for (unsigned i = 0, N = Abbreviations.size(); i < N; ++i) {
- // Get abbreviation data
- const DIEAbbrev *Abbrev = Abbreviations[i];
-
- // Emit the abbrevations code (base 1 index.)
- Asm->EmitULEB128Bytes(Abbrev->getNumber());
- Asm->EOL("Abbreviation Code");
-
- // Emit the abbreviations data.
- Abbrev->Emit(*this);
-
- Asm->EOL();
- }
-
- // Mark end of abbreviations.
- Asm->EmitULEB128Bytes(0); Asm->EOL("EOM(3)");
-
- EmitLabel("abbrev_end", 0);
-
- Asm->EOL();
- }
- }
-
- /// EmitEndOfLineMatrix - Emit the last address of the section and the end of
- /// the line matrix.
- ///
- void EmitEndOfLineMatrix(unsigned SectionEnd) {
- // Define last address of section.
- Asm->EmitInt8(0); Asm->EOL("Extended Op");
- Asm->EmitInt8(TD->getPointerSize() + 1); Asm->EOL("Op size");
- Asm->EmitInt8(DW_LNE_set_address); Asm->EOL("DW_LNE_set_address");
- EmitReference("section_end", SectionEnd); Asm->EOL("Section end label");
-
- // Mark end of matrix.
- Asm->EmitInt8(0); Asm->EOL("DW_LNE_end_sequence");
- Asm->EmitULEB128Bytes(1); Asm->EOL();
- Asm->EmitInt8(1); Asm->EOL();
- }
-
- /// EmitDebugLines - Emit source line information.
- ///
- void EmitDebugLines() {
- // If the target is using .loc/.file, the assembler will be emitting the
- // .debug_line table automatically.
- if (TAI->hasDotLocAndDotFile())
- return;
-
- // Minimum line delta, thus ranging from -10..(255-10).
- const int MinLineDelta = -(DW_LNS_fixed_advance_pc + 1);
- // Maximum line delta, thus ranging from -10..(255-10).
- const int MaxLineDelta = 255 + MinLineDelta;
-
- // Start the dwarf line section.
- Asm->SwitchToDataSection(TAI->getDwarfLineSection());
-
- // Construct the section header.
-
- EmitDifference("line_end", 0, "line_begin", 0, true);
- Asm->EOL("Length of Source Line Info");
- EmitLabel("line_begin", 0);
-
- Asm->EmitInt16(DWARF_VERSION); Asm->EOL("DWARF version number");
-
- EmitDifference("line_prolog_end", 0, "line_prolog_begin", 0, true);
- Asm->EOL("Prolog Length");
- EmitLabel("line_prolog_begin", 0);
-
- Asm->EmitInt8(1); Asm->EOL("Minimum Instruction Length");
-
- Asm->EmitInt8(1); Asm->EOL("Default is_stmt_start flag");
-
- Asm->EmitInt8(MinLineDelta); Asm->EOL("Line Base Value (Special Opcodes)");
-
- Asm->EmitInt8(MaxLineDelta); Asm->EOL("Line Range Value (Special Opcodes)");
-
- Asm->EmitInt8(-MinLineDelta); Asm->EOL("Special Opcode Base");
-
- // Line number standard opcode encodings argument count
- Asm->EmitInt8(0); Asm->EOL("DW_LNS_copy arg count");
- Asm->EmitInt8(1); Asm->EOL("DW_LNS_advance_pc arg count");
- Asm->EmitInt8(1); Asm->EOL("DW_LNS_advance_line arg count");
- Asm->EmitInt8(1); Asm->EOL("DW_LNS_set_file arg count");
- Asm->EmitInt8(1); Asm->EOL("DW_LNS_set_column arg count");
- Asm->EmitInt8(0); Asm->EOL("DW_LNS_negate_stmt arg count");
- Asm->EmitInt8(0); Asm->EOL("DW_LNS_set_basic_block arg count");
- Asm->EmitInt8(0); Asm->EOL("DW_LNS_const_add_pc arg count");
- Asm->EmitInt8(1); Asm->EOL("DW_LNS_fixed_advance_pc arg count");
-
- // 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 = SrcFiles.size();
- SourceID <= NSID; ++SourceID) {
- const SrcFileInfo &SourceFile = SrcFiles[SourceID];
- Asm->EmitString(SourceFile.getName());
- Asm->EOL("Source");
- Asm->EmitULEB128Bytes(SourceFile.getDirectoryID());
- Asm->EOL("Directory #");
- Asm->EmitULEB128Bytes(0);
- Asm->EOL("Mod date");
- Asm->EmitULEB128Bytes(0);
- Asm->EOL("File size");
- }
- Asm->EmitInt8(0); Asm->EOL("End of files");
-
- EmitLabel("line_prolog_end", 0);
-
- // A sequence for each text section.
- unsigned SecSrcLinesSize = SectionSourceLines.size();
-
- for (unsigned j = 0; j < SecSrcLinesSize; ++j) {
- // Isolate current sections line info.
- const std::vector<SrcLineInfo> &LineInfos = SectionSourceLines[j];
-
- if (VerboseAsm) {
- const Section* S = SectionMap[j + 1];
- Asm->EOL(std::string("Section ") + S->getName());
- } else
- Asm->EOL();
-
- // Dwarf assumes we start with first line of first source file.
- unsigned Source = 1;
- unsigned Line = 1;
-
- // Construct rows of the address, source, line, column matrix.
- for (unsigned i = 0, N = LineInfos.size(); i < N; ++i) {
- const SrcLineInfo &LineInfo = LineInfos[i];
- unsigned LabelID = MMI->MappedLabel(LineInfo.getLabelID());
- if (!LabelID) continue;
-
- unsigned SourceID = LineInfo.getSourceID();
- const SrcFileInfo &SourceFile = SrcFiles[SourceID];
- unsigned DirectoryID = SourceFile.getDirectoryID();
- if (VerboseAsm)
- Asm->EOL(Directories[DirectoryID]
- + SourceFile.getName()
- + ":"
- + utostr_32(LineInfo.getLine()));
- else
- Asm->EOL();
-
- // Define the line address.
- Asm->EmitInt8(0); Asm->EOL("Extended Op");
- Asm->EmitInt8(TD->getPointerSize() + 1); Asm->EOL("Op size");
- Asm->EmitInt8(DW_LNE_set_address); Asm->EOL("DW_LNE_set_address");
- EmitReference("label", LabelID); Asm->EOL("Location label");
-
- // If change of source, then switch to the new source.
- if (Source != LineInfo.getSourceID()) {
- Source = LineInfo.getSourceID();
- Asm->EmitInt8(DW_LNS_set_file); Asm->EOL("DW_LNS_set_file");
- Asm->EmitULEB128Bytes(Source); Asm->EOL("New Source");
- }
-
- // If change of line.
- if (Line != LineInfo.getLine()) {
- // Determine offset.
- int Offset = LineInfo.getLine() - Line;
- int Delta = Offset - MinLineDelta;
-
- // Update line.
- Line = LineInfo.getLine();
-
- // If delta is small enough and in range...
- if (Delta >= 0 && Delta < (MaxLineDelta - 1)) {
- // ... then use fast opcode.
- Asm->EmitInt8(Delta - MinLineDelta); Asm->EOL("Line Delta");
- } else {
- // ... otherwise use long hand.
- Asm->EmitInt8(DW_LNS_advance_line); Asm->EOL("DW_LNS_advance_line");
- Asm->EmitSLEB128Bytes(Offset); Asm->EOL("Line Offset");
- Asm->EmitInt8(DW_LNS_copy); Asm->EOL("DW_LNS_copy");
- }
- } else {
- // Copy the previous row (different address or source)
- Asm->EmitInt8(DW_LNS_copy); Asm->EOL("DW_LNS_copy");
- }
- }
-
- EmitEndOfLineMatrix(j + 1);
- }
-
- if (SecSrcLinesSize == 0)
- // Because we're emitting a debug_line section, we still need a line
- // table. The linker and friends expect it to exist. If there's nothing to
- // put into it, emit an empty table.
- EmitEndOfLineMatrix(1);
-
- EmitLabel("line_end", 0);
-
- Asm->EOL();
- }
-
- /// EmitCommonDebugFrame - Emit common frame info into a debug frame section.
- ///
- void EmitCommonDebugFrame() {
- if (!TAI->doesDwarfRequireFrameSection())
- return;
-
- int stackGrowth =
- Asm->TM.getFrameInfo()->getStackGrowthDirection() ==
- TargetFrameInfo::StackGrowsUp ?
- TD->getPointerSize() : -TD->getPointerSize();
-
- // Start the dwarf frame section.
- Asm->SwitchToDataSection(TAI->getDwarfFrameSection());
-
- EmitLabel("debug_frame_common", 0);
- EmitDifference("debug_frame_common_end", 0,
- "debug_frame_common_begin", 0, true);
- Asm->EOL("Length of Common Information Entry");
-
- EmitLabel("debug_frame_common_begin", 0);
- Asm->EmitInt32((int)DW_CIE_ID);
- Asm->EOL("CIE Identifier Tag");
- Asm->EmitInt8(DW_CIE_VERSION);
- Asm->EOL("CIE Version");
- Asm->EmitString("");
- Asm->EOL("CIE Augmentation");
- Asm->EmitULEB128Bytes(1);
- Asm->EOL("CIE Code Alignment Factor");
- Asm->EmitSLEB128Bytes(stackGrowth);
- Asm->EOL("CIE Data Alignment Factor");
- Asm->EmitInt8(RI->getDwarfRegNum(RI->getRARegister(), false));
- Asm->EOL("CIE RA Column");
-
- std::vector<MachineMove> Moves;
- RI->getInitialFrameState(Moves);
-
- EmitFrameMoves(NULL, 0, Moves, false);
-
- Asm->EmitAlignment(2, 0, 0, false);
- EmitLabel("debug_frame_common_end", 0);
-
- Asm->EOL();
- }
-
- /// EmitFunctionDebugFrame - Emit per function frame info into a debug frame
- /// section.
- void EmitFunctionDebugFrame(const FunctionDebugFrameInfo &DebugFrameInfo) {
- if (!TAI->doesDwarfRequireFrameSection())
- return;
-
- // Start the dwarf frame section.
- Asm->SwitchToDataSection(TAI->getDwarfFrameSection());
-
- EmitDifference("debug_frame_end", DebugFrameInfo.Number,
- "debug_frame_begin", DebugFrameInfo.Number, true);
- Asm->EOL("Length of Frame Information Entry");
-
- EmitLabel("debug_frame_begin", DebugFrameInfo.Number);
-
- EmitSectionOffset("debug_frame_common", "section_debug_frame",
- 0, 0, true, false);
- Asm->EOL("FDE CIE offset");
-
- EmitReference("func_begin", DebugFrameInfo.Number);
- Asm->EOL("FDE initial location");
- EmitDifference("func_end", DebugFrameInfo.Number,
- "func_begin", DebugFrameInfo.Number);
- Asm->EOL("FDE address range");
-
- EmitFrameMoves("func_begin", DebugFrameInfo.Number, DebugFrameInfo.Moves,
- false);
-
- Asm->EmitAlignment(2, 0, 0, false);
- EmitLabel("debug_frame_end", DebugFrameInfo.Number);
-
- Asm->EOL();
- }
-
- /// EmitDebugPubNames - Emit visible names into a debug pubnames section.
- ///
- void EmitDebugPubNames() {
- // Start the dwarf pubnames section.
- Asm->SwitchToDataSection(TAI->getDwarfPubNamesSection());
-
- for (DenseMap<Value *, CompileUnit *>::iterator CI = DW_CUs.begin(),
- CE = DW_CUs.end(); CI != CE; ++CI) {
- CompileUnit *Unit = CI->second;
-
- EmitDifference("pubnames_end", Unit->getID(),
- "pubnames_begin", Unit->getID(), true);
- Asm->EOL("Length of Public Names Info");
-
- EmitLabel("pubnames_begin", Unit->getID());
-
- Asm->EmitInt16(DWARF_VERSION); Asm->EOL("DWARF Version");
-
- EmitSectionOffset("info_begin", "section_info",
- Unit->getID(), 0, true, false);
- Asm->EOL("Offset of Compilation Unit Info");
-
- EmitDifference("info_end", Unit->getID(), "info_begin", Unit->getID(),
- true);
- Asm->EOL("Compilation Unit Length");
-
- std::map<std::string, DIE *> &Globals = Unit->getGlobals();
-
- for (std::map<std::string, DIE *>::iterator GI = Globals.begin(),
- GE = Globals.end();
- GI != GE; ++GI) {
- const std::string &Name = GI->first;
- DIE * Entity = GI->second;
-
- Asm->EmitInt32(Entity->getOffset()); Asm->EOL("DIE offset");
- Asm->EmitString(Name); Asm->EOL("External Name");
- }
-
- Asm->EmitInt32(0); Asm->EOL("End Mark");
- EmitLabel("pubnames_end", Unit->getID());
-
- Asm->EOL();
- }
- }
-
- /// EmitDebugStr - Emit visible names into a debug str section.
- ///
- void EmitDebugStr() {
- // Check to see if it is worth the effort.
- if (!StringPool.empty()) {
- // Start the dwarf str section.
- Asm->SwitchToDataSection(TAI->getDwarfStrSection());
-
- // For each of strings in the string pool.
- for (unsigned StringID = 1, N = StringPool.size();
- StringID <= N; ++StringID) {
- // Emit a label for reference from debug information entries.
- EmitLabel("string", StringID);
- // Emit the string itself.
- const std::string &String = StringPool[StringID];
- Asm->EmitString(String); Asm->EOL();
- }
-
- Asm->EOL();
- }
- }
-
- /// EmitDebugLoc - Emit visible names into a debug loc section.
- ///
- void EmitDebugLoc() {
- // Start the dwarf loc section.
- Asm->SwitchToDataSection(TAI->getDwarfLocSection());
-
- Asm->EOL();
- }
-
- /// EmitDebugARanges - Emit visible names into a debug aranges section.
- ///
- void EmitDebugARanges() {
- // Start the dwarf aranges section.
- Asm->SwitchToDataSection(TAI->getDwarfARangesSection());
-
- // FIXME - Mock up
-#if 0
- CompileUnit *Unit = GetBaseCompileUnit();
-
- // Don't include size of length
- Asm->EmitInt32(0x1c); Asm->EOL("Length of Address Ranges Info");
-
- Asm->EmitInt16(DWARF_VERSION); Asm->EOL("Dwarf Version");
-
- EmitReference("info_begin", Unit->getID());
- Asm->EOL("Offset of Compilation Unit Info");
-
- Asm->EmitInt8(TD->getPointerSize()); Asm->EOL("Size of Address");
-
- Asm->EmitInt8(0); Asm->EOL("Size of Segment Descriptor");
-
- Asm->EmitInt16(0); Asm->EOL("Pad (1)");
- Asm->EmitInt16(0); Asm->EOL("Pad (2)");
-
- // Range 1
- EmitReference("text_begin", 0); Asm->EOL("Address");
- EmitDifference("text_end", 0, "text_begin", 0, true); Asm->EOL("Length");
-
- Asm->EmitInt32(0); Asm->EOL("EOM (1)");
- Asm->EmitInt32(0); Asm->EOL("EOM (2)");
-#endif
-
- Asm->EOL();
- }
-
- /// EmitDebugRanges - Emit visible names into a debug ranges section.
- ///
- void EmitDebugRanges() {
- // Start the dwarf ranges section.
- Asm->SwitchToDataSection(TAI->getDwarfRangesSection());
-
- Asm->EOL();
- }
-
- /// EmitDebugMacInfo - Emit visible names into a debug macinfo section.
- ///
- void EmitDebugMacInfo() {
- // Start the dwarf macinfo section.
- Asm->SwitchToDataSection(TAI->getDwarfMacInfoSection());
-
- Asm->EOL();
- }
-
- /// ConstructCompileUnits - Create a compile unit DIEs.
- void ConstructCompileUnits() {
- std::string CUName = "llvm.dbg.compile_units";
- std::vector<GlobalVariable*> Result;
- getGlobalVariablesUsing(*M, CUName, Result);
- for (std::vector<GlobalVariable *>::iterator RI = Result.begin(),
- RE = Result.end(); RI != RE; ++RI) {
- DICompileUnit DIUnit(*RI);
- unsigned ID = RecordSource(DIUnit.getDirectory(),
- DIUnit.getFilename());
-
- DIE *Die = new DIE(DW_TAG_compile_unit);
- AddSectionOffset(Die, DW_AT_stmt_list, DW_FORM_data4,
- DWLabel("section_line", 0), DWLabel("section_line", 0),
- false);
- AddString(Die, DW_AT_producer, DW_FORM_string, DIUnit.getProducer());
- AddUInt(Die, DW_AT_language, DW_FORM_data1, DIUnit.getLanguage());
- AddString(Die, DW_AT_name, DW_FORM_string, DIUnit.getFilename());
- if (!DIUnit.getDirectory().empty())
- AddString(Die, DW_AT_comp_dir, DW_FORM_string, DIUnit.getDirectory());
-
- CompileUnit *Unit = new CompileUnit(ID, Die);
- DW_CUs[DIUnit.getGV()] = Unit;
- }
- }
-
- /// ConstructGlobalVariableDIEs - Create DIEs for each of the externally
- /// visible global variables.
- void ConstructGlobalVariableDIEs() {
- std::string GVName = "llvm.dbg.global_variables";
- std::vector<GlobalVariable*> Result;
- getGlobalVariablesUsing(*M, GVName, Result);
- for (std::vector<GlobalVariable *>::iterator GVI = Result.begin(),
- GVE = Result.end(); GVI != GVE; ++GVI) {
- DIGlobalVariable DI_GV(*GVI);
- CompileUnit *DW_Unit = FindCompileUnit(DI_GV.getCompileUnit());
-
- // Check for pre-existence.
- DIE *&Slot = DW_Unit->getDieMapSlotFor(DI_GV.getGV());
- if (Slot) continue;
-
- DIE *VariableDie = CreateGlobalVariableDIE(DW_Unit, DI_GV);
-
- // Add address.
- DIEBlock *Block = new DIEBlock();
- AddUInt(Block, 0, DW_FORM_data1, DW_OP_addr);
- AddObjectLabel(Block, 0, DW_FORM_udata,
- Asm->getGlobalLinkName(DI_GV.getGlobal()));
- AddBlock(VariableDie, DW_AT_location, 0, Block);
-
- //Add to map.
- Slot = VariableDie;
-
- //Add to context owner.
- DW_Unit->getDie()->AddChild(VariableDie);
-
- //Expose as global. FIXME - need to check external flag.
- DW_Unit->AddGlobal(DI_GV.getName(), VariableDie);
- }
- }
-
- /// ConstructSubprograms - Create DIEs for each of the externally visible
- /// subprograms.
- void ConstructSubprograms() {
-
- std::string SPName = "llvm.dbg.subprograms";
- std::vector<GlobalVariable*> Result;
- getGlobalVariablesUsing(*M, SPName, Result);
- for (std::vector<GlobalVariable *>::iterator RI = Result.begin(),
- RE = Result.end(); RI != RE; ++RI) {
-
- DISubprogram SP(*RI);
- CompileUnit *Unit = FindCompileUnit(SP.getCompileUnit());
-
- // Check for pre-existence.
- DIE *&Slot = Unit->getDieMapSlotFor(SP.getGV());
- if (Slot) continue;
-
- DIE *SubprogramDie = CreateSubprogramDIE(Unit, SP);
-
- //Add to map.
- Slot = SubprogramDie;
- //Add to context owner.
- Unit->getDie()->AddChild(SubprogramDie);
- //Expose as global.
- Unit->AddGlobal(SP.getName(), SubprogramDie);
- }
- }
-
-public:
- //===--------------------------------------------------------------------===//
- // Main entry points.
- //
- DwarfDebug(raw_ostream &OS, AsmPrinter *A, const TargetAsmInfo *T)
- : Dwarf(OS, A, T, "dbg")
- , AbbreviationsSet(InitAbbreviationsSetSize)
- , Abbreviations()
- , ValuesSet(InitValuesSetSize)
- , Values()
- , StringPool()
- , SectionMap()
- , SectionSourceLines()
- , didInitial(false)
- , shouldEmit(false)
- , RootDbgScope(NULL)
- {
- }
- virtual ~DwarfDebug() {
- for (unsigned j = 0, M = Values.size(); j < M; ++j)
- delete Values[j];
- }
-
- /// SetDebugInfo - Create global DIEs and emit initial debug info sections.
- /// This is inovked by the target AsmPrinter.
- void SetDebugInfo(MachineModuleInfo *mmi) {
-
- // Create all the compile unit DIEs.
- ConstructCompileUnits();
-
- if (DW_CUs.empty())
- return;
-
- MMI = mmi;
- shouldEmit = true;
- MMI->setDebugInfoAvailability(true);
-
- // Create DIEs for each of the externally visible global variables.
- ConstructGlobalVariableDIEs();
-
- // Create DIEs for each of the externally visible subprograms.
- ConstructSubprograms();
-
- // Prime section data.
- SectionMap.insert(TAI->getTextSection());
-
- // Print out .file directives to specify files for .loc directives. These
- // are printed out early so that they precede any .loc directives.
- if (TAI->hasDotLocAndDotFile()) {
- for (unsigned i = 1, e = SrcFiles.size(); i <= e; ++i) {
- sys::Path FullPath(Directories[SrcFiles[i].getDirectoryID()]);
- bool AppendOk = FullPath.appendComponent(SrcFiles[i].getName());
- assert(AppendOk && "Could not append filename to directory!");
- AppendOk = false;
- Asm->EmitFile(i, FullPath.toString());
- Asm->EOL();
- }
- }
-
- // Emit initial sections
- EmitInitial();
- }
-
- /// BeginModule - Emit all Dwarf sections that should come prior to the
- /// content.
- void BeginModule(Module *M) {
- this->M = M;
- }
-
- /// EndModule - Emit all Dwarf sections that should come after the content.
- ///
- void EndModule() {
- if (!ShouldEmitDwarf()) return;
-
- // Standard sections final addresses.
- Asm->SwitchToSection(TAI->getTextSection());
- EmitLabel("text_end", 0);
- Asm->SwitchToSection(TAI->getDataSection());
- EmitLabel("data_end", 0);
-
- // End text sections.
- for (unsigned i = 1, N = SectionMap.size(); i <= N; ++i) {
- Asm->SwitchToSection(SectionMap[i]);
- EmitLabel("section_end", i);
- }
-
- // Emit common frame information.
- EmitCommonDebugFrame();
-
- // Emit function debug frame information
- for (std::vector<FunctionDebugFrameInfo>::iterator I = DebugFrames.begin(),
- E = DebugFrames.end(); I != E; ++I)
- EmitFunctionDebugFrame(*I);
-
- // Compute DIE offsets and sizes.
- SizeAndOffsets();
-
- // Emit all the DIEs into a debug info section
- EmitDebugInfo();
-
- // Corresponding abbreviations into a abbrev section.
- EmitAbbreviations();
-
- // Emit source line correspondence into a debug line section.
- EmitDebugLines();
-
- // Emit info into a debug pubnames section.
- EmitDebugPubNames();
-
- // Emit info into a debug str section.
- EmitDebugStr();
-
- // Emit info into a debug loc section.
- EmitDebugLoc();
-
- // Emit info into a debug aranges section.
- EmitDebugARanges();
-
- // Emit info into a debug ranges section.
- EmitDebugRanges();
-
- // Emit info into a debug macinfo section.
- EmitDebugMacInfo();
- }
-
- /// BeginFunction - Gather pre-function debug information. Assumes being
- /// emitted immediately after the function entry point.
- void BeginFunction(MachineFunction *MF) {
- this->MF = MF;
-
- if (!ShouldEmitDwarf()) return;
-
- // Begin accumulating function debug information.
- MMI->BeginFunction(MF);
-
- // Assumes in correct section after the entry point.
- EmitLabel("func_begin", ++SubprogramCount);
-
- // Emit label for the implicitly defined dbg.stoppoint at the start of
- // the function.
- if (!Lines.empty()) {
- const SrcLineInfo &LineInfo = Lines[0];
- Asm->printLabel(LineInfo.getLabelID());
- }
- }
-
- /// EndFunction - Gather and emit post-function debug information.
- ///
- void EndFunction(MachineFunction *MF) {
- if (!ShouldEmitDwarf()) return;
-
- // Define end label for subprogram.
- EmitLabel("func_end", SubprogramCount);
-
- // Get function line info.
- if (!Lines.empty()) {
- // Get section line info.
- unsigned ID = SectionMap.insert(Asm->CurrentSection_);
- if (SectionSourceLines.size() < ID) SectionSourceLines.resize(ID);
- std::vector<SrcLineInfo> &SectionLineInfos = SectionSourceLines[ID-1];
- // Append the function info to section info.
- SectionLineInfos.insert(SectionLineInfos.end(),
- Lines.begin(), Lines.end());
- }
-
- // Construct scopes for subprogram.
- if (RootDbgScope)
- ConstructRootDbgScope(RootDbgScope);
- else
- // FIXME: This is wrong. We are essentially getting past a problem with
- // debug information not being able to handle unreachable blocks that have
- // debug information in them. In particular, those unreachable blocks that
- // have "region end" info in them. That situation results in the "root
- // scope" not being created. If that's the case, then emit a "default"
- // scope, i.e., one that encompasses the whole function. This isn't
- // desirable. And a better way of handling this (and all of the debugging
- // information) needs to be explored.
- ConstructDefaultDbgScope(MF);
-
- DebugFrames.push_back(FunctionDebugFrameInfo(SubprogramCount,
- MMI->getFrameMoves()));
-
- // Clear debug info
- if (RootDbgScope) {
- delete RootDbgScope;
- DbgScopeMap.clear();
- RootDbgScope = NULL;
- }
- Lines.clear();
- }
-
-public:
-
- /// ValidDebugInfo - Return true if V represents valid debug info value.
- bool ValidDebugInfo(Value *V) {
-
- if (!V)
- return false;
-
- if (!shouldEmit)
- return false;
-
- GlobalVariable *GV = getGlobalVariable(V);
- if (!GV)
- return false;
-
- if (GV->getLinkage() != GlobalValue::InternalLinkage
- && GV->getLinkage() != GlobalValue::LinkOnceLinkage)
- return false;
-
- DIDescriptor DI(GV);
- // Check current version. Allow Version6 for now.
- unsigned Version = DI.getVersion();
- if (Version != LLVMDebugVersion && Version != LLVMDebugVersion6)
- return false;
-
- unsigned Tag = DI.getTag();
- switch (Tag) {
- case DW_TAG_variable:
- assert (DIVariable(GV).Verify() && "Invalid DebugInfo value");
- break;
- case DW_TAG_compile_unit:
- assert (DICompileUnit(GV).Verify() && "Invalid DebugInfo value");
- break;
- case DW_TAG_subprogram:
- assert (DISubprogram(GV).Verify() && "Invalid DebugInfo value");
- break;
- default:
- break;
- }
-
- return true;
- }
-
- /// RecordSourceLine - Records location information and associates it with a
- /// label. Returns a unique label ID used to generate a label and provide
- /// correspondence to the source line list.
- unsigned RecordSourceLine(Value *V, unsigned Line, unsigned Col) {
- CompileUnit *Unit = DW_CUs[V];
- assert (Unit && "Unable to find CompileUnit");
- unsigned ID = MMI->NextLabelID();
- Lines.push_back(SrcLineInfo(Line, Col, Unit->getID(), ID));
- return ID;
- }
-
- /// RecordSourceLine - Records location information and associates it with a
- /// label. Returns a unique label ID used to generate a label and provide
- /// correspondence to the source line list.
- unsigned RecordSourceLine(unsigned Line, unsigned Col, unsigned Src) {
- unsigned ID = MMI->NextLabelID();
- Lines.push_back(SrcLineInfo(Line, Col, Src, ID));
- return ID;
- }
-
- unsigned getRecordSourceLineCount() {
- return Lines.size();
- }
-
- /// RecordSource - Register a source file with debug info. Returns an source
- /// ID.
- unsigned RecordSource(const std::string &Directory,
- const std::string &File) {
- unsigned DID = Directories.insert(Directory);
- return SrcFiles.insert(SrcFileInfo(DID,File));
- }
-
- /// RecordRegionStart - Indicate the start of a region.
- ///
- unsigned RecordRegionStart(GlobalVariable *V) {
- DbgScope *Scope = getOrCreateScope(V);
- unsigned ID = MMI->NextLabelID();
- if (!Scope->getStartLabelID()) Scope->setStartLabelID(ID);
- return ID;
- }
-
- /// RecordRegionEnd - Indicate the end of a region.
- ///
- unsigned RecordRegionEnd(GlobalVariable *V) {
- DbgScope *Scope = getOrCreateScope(V);
- unsigned ID = MMI->NextLabelID();
- Scope->setEndLabelID(ID);
- return ID;
- }
-
- /// RecordVariable - Indicate the declaration of a local variable.
- ///
- void RecordVariable(GlobalVariable *GV, unsigned FrameIndex) {
- DIDescriptor Desc(GV);
- DbgScope *Scope = NULL;
- if (Desc.getTag() == DW_TAG_variable) {
- // GV is a global variable.
- DIGlobalVariable DG(GV);
- Scope = getOrCreateScope(DG.getContext().getGV());
- } else {
- // or GV is a local variable.
- DIVariable DV(GV);
- Scope = getOrCreateScope(DV.getContext().getGV());
- }
- assert (Scope && "Unable to find variable' scope");
- DbgVariable *DV = new DbgVariable(DIVariable(GV), FrameIndex);
- Scope->AddVariable(DV);
- }
-};
-
-//===----------------------------------------------------------------------===//
-/// DwarfException - Emits Dwarf exception handling directives.
-///
-class DwarfException : public Dwarf {
-
-private:
- struct FunctionEHFrameInfo {
- std::string FnName;
- unsigned Number;
- unsigned PersonalityIndex;
- bool hasCalls;
- bool hasLandingPads;
- std::vector<MachineMove> Moves;
- const Function * function;
-
- FunctionEHFrameInfo(const std::string &FN, unsigned Num, unsigned P,
- bool hC, bool hL,
- const std::vector<MachineMove> &M,
- const Function *f):
- FnName(FN), Number(Num), PersonalityIndex(P),
- hasCalls(hC), hasLandingPads(hL), Moves(M), function (f) { }
- };
-
- std::vector<FunctionEHFrameInfo> EHFrames;
-
- /// shouldEmitTable - Per-function flag to indicate if EH tables should
- /// be emitted.
- bool shouldEmitTable;
-
- /// shouldEmitMoves - Per-function flag to indicate if frame moves info
- /// should be emitted.
- bool shouldEmitMoves;
-
- /// shouldEmitTableModule - Per-module flag to indicate if EH tables
- /// should be emitted.
- bool shouldEmitTableModule;
-
- /// shouldEmitFrameModule - Per-module flag to indicate if frame moves
- /// should be emitted.
- bool shouldEmitMovesModule;
-
- /// EmitCommonEHFrame - Emit the common eh unwind frame.
- ///
- void EmitCommonEHFrame(const Function *Personality, unsigned Index) {
- // Size and sign of stack growth.
- int stackGrowth =
- Asm->TM.getFrameInfo()->getStackGrowthDirection() ==
- TargetFrameInfo::StackGrowsUp ?
- TD->getPointerSize() : -TD->getPointerSize();
-
- // Begin eh frame section.
- Asm->SwitchToTextSection(TAI->getDwarfEHFrameSection());
-
- if (!TAI->doesRequireNonLocalEHFrameLabel())
- O << TAI->getEHGlobalPrefix();
- O << "EH_frame" << Index << ":\n";
- EmitLabel("section_eh_frame", Index);
-
- // Define base labels.
- EmitLabel("eh_frame_common", Index);
-
- // Define the eh frame length.
- EmitDifference("eh_frame_common_end", Index,
- "eh_frame_common_begin", Index, true);
- Asm->EOL("Length of Common Information Entry");
-
- // EH frame header.
- EmitLabel("eh_frame_common_begin", Index);
- Asm->EmitInt32((int)0);
- Asm->EOL("CIE Identifier Tag");
- Asm->EmitInt8(DW_CIE_VERSION);
- Asm->EOL("CIE Version");
-
- // The personality presence indicates that language specific information
- // will show up in the eh frame.
- Asm->EmitString(Personality ? "zPLR" : "zR");
- Asm->EOL("CIE Augmentation");
-
- // Round out reader.
- Asm->EmitULEB128Bytes(1);
- Asm->EOL("CIE Code Alignment Factor");
- Asm->EmitSLEB128Bytes(stackGrowth);
- Asm->EOL("CIE Data Alignment Factor");
- Asm->EmitInt8(RI->getDwarfRegNum(RI->getRARegister(), true));
- Asm->EOL("CIE Return Address Column");
-
- // If there is a personality, we need to indicate the functions location.
- if (Personality) {
- Asm->EmitULEB128Bytes(7);
- Asm->EOL("Augmentation Size");
-
- if (TAI->getNeedsIndirectEncoding()) {
- Asm->EmitInt8(DW_EH_PE_pcrel | DW_EH_PE_sdata4 | DW_EH_PE_indirect);
- Asm->EOL("Personality (pcrel sdata4 indirect)");
- } else {
- Asm->EmitInt8(DW_EH_PE_pcrel | DW_EH_PE_sdata4);
- Asm->EOL("Personality (pcrel sdata4)");
- }
-
- PrintRelDirective(true);
- O << TAI->getPersonalityPrefix();
- Asm->EmitExternalGlobal((const GlobalVariable *)(Personality));
- O << TAI->getPersonalitySuffix();
- if (strcmp(TAI->getPersonalitySuffix(), "+4@GOTPCREL"))
- O << "-" << TAI->getPCSymbol();
- Asm->EOL("Personality");
-
- Asm->EmitInt8(DW_EH_PE_pcrel | DW_EH_PE_sdata4);
- Asm->EOL("LSDA Encoding (pcrel sdata4)");
-
- Asm->EmitInt8(DW_EH_PE_pcrel | DW_EH_PE_sdata4);
- Asm->EOL("FDE Encoding (pcrel sdata4)");
- } else {
- Asm->EmitULEB128Bytes(1);
- Asm->EOL("Augmentation Size");
-
- Asm->EmitInt8(DW_EH_PE_pcrel | DW_EH_PE_sdata4);
- Asm->EOL("FDE Encoding (pcrel sdata4)");
- }
-
- // Indicate locations of general callee saved registers in frame.
- std::vector<MachineMove> Moves;
- RI->getInitialFrameState(Moves);
- EmitFrameMoves(NULL, 0, Moves, true);
-
- // On Darwin the linker honors the alignment of eh_frame, which means it
- // must be 8-byte on 64-bit targets to match what gcc does. Otherwise
- // you get holes which confuse readers of eh_frame.
- Asm->EmitAlignment(TD->getPointerSize() == sizeof(int32_t) ? 2 : 3,
- 0, 0, false);
- EmitLabel("eh_frame_common_end", Index);
-
- Asm->EOL();
- }
-
- /// EmitEHFrame - Emit function exception frame information.
- ///
- void EmitEHFrame(const FunctionEHFrameInfo &EHFrameInfo) {
- Function::LinkageTypes linkage = EHFrameInfo.function->getLinkage();
-
- Asm->SwitchToTextSection(TAI->getDwarfEHFrameSection());
-
- // Externally visible entry into the functions eh frame info.
- // If the corresponding function is static, this should not be
- // externally visible.
- if (linkage != Function::InternalLinkage &&
- linkage != Function::PrivateLinkage) {
- if (const char *GlobalEHDirective = TAI->getGlobalEHDirective())
- O << GlobalEHDirective << EHFrameInfo.FnName << "\n";
- }
-
- // If corresponding function is weak definition, this should be too.
- if ((linkage == Function::WeakLinkage ||
- linkage == Function::LinkOnceLinkage) &&
- TAI->getWeakDefDirective())
- O << TAI->getWeakDefDirective() << EHFrameInfo.FnName << "\n";
-
- // If there are no calls then you can't unwind. This may mean we can
- // omit the EH Frame, but some environments do not handle weak absolute
- // symbols.
- // If UnwindTablesMandatory is set we cannot do this optimization; the
- // unwind info is to be available for non-EH uses.
- if (!EHFrameInfo.hasCalls &&
- !UnwindTablesMandatory &&
- ((linkage != Function::WeakLinkage &&
- linkage != Function::LinkOnceLinkage) ||
- !TAI->getWeakDefDirective() ||
- TAI->getSupportsWeakOmittedEHFrame()))
- {
- O << EHFrameInfo.FnName << " = 0\n";
- // This name has no connection to the function, so it might get
- // dead-stripped when the function is not, erroneously. Prohibit
- // dead-stripping unconditionally.
- if (const char *UsedDirective = TAI->getUsedDirective())
- O << UsedDirective << EHFrameInfo.FnName << "\n\n";
- } else {
- O << EHFrameInfo.FnName << ":\n";
-
- // EH frame header.
- EmitDifference("eh_frame_end", EHFrameInfo.Number,
- "eh_frame_begin", EHFrameInfo.Number, true);
- Asm->EOL("Length of Frame Information Entry");
-
- EmitLabel("eh_frame_begin", EHFrameInfo.Number);
-
- if (TAI->doesRequireNonLocalEHFrameLabel()) {
- PrintRelDirective(true, true);
- PrintLabelName("eh_frame_begin", EHFrameInfo.Number);
-
- if (!TAI->isAbsoluteEHSectionOffsets())
- O << "-EH_frame" << EHFrameInfo.PersonalityIndex;
- } else {
- EmitSectionOffset("eh_frame_begin", "eh_frame_common",
- EHFrameInfo.Number, EHFrameInfo.PersonalityIndex,
- true, true, false);
- }
-
- Asm->EOL("FDE CIE offset");
-
- EmitReference("eh_func_begin", EHFrameInfo.Number, true, true);
- Asm->EOL("FDE initial location");
- EmitDifference("eh_func_end", EHFrameInfo.Number,
- "eh_func_begin", EHFrameInfo.Number, true);
- Asm->EOL("FDE address range");
-
- // If there is a personality and landing pads then point to the language
- // specific data area in the exception table.
- if (EHFrameInfo.PersonalityIndex) {
- Asm->EmitULEB128Bytes(4);
- Asm->EOL("Augmentation size");
-
- if (EHFrameInfo.hasLandingPads)
- EmitReference("exception", EHFrameInfo.Number, true, true);
- else
- Asm->EmitInt32((int)0);
- Asm->EOL("Language Specific Data Area");
- } else {
- Asm->EmitULEB128Bytes(0);
- Asm->EOL("Augmentation size");
- }
-
- // Indicate locations of function specific callee saved registers in
- // frame.
- EmitFrameMoves("eh_func_begin", EHFrameInfo.Number, EHFrameInfo.Moves,
- true);
-
- // On Darwin the linker honors the alignment of eh_frame, which means it
- // must be 8-byte on 64-bit targets to match what gcc does. Otherwise
- // you get holes which confuse readers of eh_frame.
- Asm->EmitAlignment(TD->getPointerSize() == sizeof(int32_t) ? 2 : 3,
- 0, 0, false);
- EmitLabel("eh_frame_end", EHFrameInfo.Number);
-
- // If the function is marked used, this table should be also. We cannot
- // make the mark unconditional in this case, since retaining the table
- // also retains the function in this case, and there is code around
- // that depends on unused functions (calling undefined externals) being
- // dead-stripped to link correctly. Yes, there really is.
- if (MMI->getUsedFunctions().count(EHFrameInfo.function))
- if (const char *UsedDirective = TAI->getUsedDirective())
- O << UsedDirective << EHFrameInfo.FnName << "\n\n";
- }
- }
-
- /// EmitExceptionTable - Emit landing pads and actions.
- ///
- /// The general organization of the table is complex, but the basic concepts
- /// are easy. First there is a header which describes the location and
- /// organization of the three components that follow.
- /// 1. The landing pad site information describes the range of code covered
- /// by the try. In our case it's an accumulation of the ranges covered
- /// by the invokes in the try. There is also a reference to the landing
- /// pad that handles the exception once processed. Finally an index into
- /// the actions table.
- /// 2. The action table, in our case, is composed of pairs of type ids
- /// and next action offset. Starting with the action index from the
- /// landing pad site, each type Id is checked for a match to the current
- /// exception. If it matches then the exception and type id are passed
- /// on to the landing pad. Otherwise the next action is looked up. This
- /// chain is terminated with a next action of zero. If no type id is
- /// found the the frame is unwound and handling continues.
- /// 3. Type id table contains references to all the C++ typeinfo for all
- /// catches in the function. This tables is reversed indexed base 1.
-
- /// SharedTypeIds - How many leading type ids two landing pads have in common.
- static unsigned SharedTypeIds(const LandingPadInfo *L,
- const LandingPadInfo *R) {
- const std::vector<int> &LIds = L->TypeIds, &RIds = R->TypeIds;
- unsigned LSize = LIds.size(), RSize = RIds.size();
- unsigned MinSize = LSize < RSize ? LSize : RSize;
- unsigned Count = 0;
-
- for (; Count != MinSize; ++Count)
- if (LIds[Count] != RIds[Count])
- return Count;
-
- return Count;
- }
-
- /// PadLT - Order landing pads lexicographically by type id.
- static bool PadLT(const LandingPadInfo *L, const LandingPadInfo *R) {
- const std::vector<int> &LIds = L->TypeIds, &RIds = R->TypeIds;
- unsigned LSize = LIds.size(), RSize = RIds.size();
- unsigned MinSize = LSize < RSize ? LSize : RSize;
-
- for (unsigned i = 0; i != MinSize; ++i)
- if (LIds[i] != RIds[i])
- return LIds[i] < RIds[i];
-
- return LSize < RSize;
- }
-
- struct KeyInfo {
- static inline unsigned getEmptyKey() { return -1U; }
- static inline unsigned getTombstoneKey() { return -2U; }
- static unsigned getHashValue(const unsigned &Key) { return Key; }
- static bool isEqual(unsigned LHS, unsigned RHS) { return LHS == RHS; }
- static bool isPod() { return true; }
- };
-
- /// ActionEntry - Structure describing an entry in the actions table.
- struct ActionEntry {
- int ValueForTypeID; // The value to write - may not be equal to the type id.
- int NextAction;
- struct ActionEntry *Previous;
- };
-
- /// PadRange - Structure holding a try-range and the associated landing pad.
- struct PadRange {
- // The index of the landing pad.
- unsigned PadIndex;
- // The index of the begin and end labels in the landing pad's label lists.
- unsigned RangeIndex;
- };
-
- typedef DenseMap<unsigned, PadRange, KeyInfo> RangeMapType;
-
- /// CallSiteEntry - Structure describing an entry in the call-site table.
- struct CallSiteEntry {
- // The 'try-range' is BeginLabel .. EndLabel.
- unsigned BeginLabel; // zero indicates the start of the function.
- unsigned EndLabel; // zero indicates the end of the function.
- // The landing pad starts at PadLabel.
- unsigned PadLabel; // zero indicates that there is no landing pad.
- unsigned Action;
- };
-
- void EmitExceptionTable() {
- const std::vector<GlobalVariable *> &TypeInfos = MMI->getTypeInfos();
- const std::vector<unsigned> &FilterIds = MMI->getFilterIds();
- const std::vector<LandingPadInfo> &PadInfos = MMI->getLandingPads();
- if (PadInfos.empty()) return;
-
- // Sort the landing pads in order of their type ids. This is used to fold
- // duplicate actions.
- SmallVector<const LandingPadInfo *, 64> LandingPads;
- LandingPads.reserve(PadInfos.size());
- for (unsigned i = 0, N = PadInfos.size(); i != N; ++i)
- LandingPads.push_back(&PadInfos[i]);
- std::sort(LandingPads.begin(), LandingPads.end(), PadLT);
-
- // Negative type ids index into FilterIds, positive type ids index into
- // TypeInfos. The value written for a positive type id is just the type
- // id itself. For a negative type id, however, the value written is the
- // (negative) byte offset of the corresponding FilterIds entry. The byte
- // offset is usually equal to the type id, because the FilterIds entries
- // are written using a variable width encoding which outputs one byte per
- // entry as long as the value written is not too large, but can differ.
- // This kind of complication does not occur for positive type ids because
- // type infos are output using a fixed width encoding.
- // FilterOffsets[i] holds the byte offset corresponding to FilterIds[i].
- SmallVector<int, 16> FilterOffsets;
- FilterOffsets.reserve(FilterIds.size());
- int Offset = -1;
- for(std::vector<unsigned>::const_iterator I = FilterIds.begin(),
- E = FilterIds.end(); I != E; ++I) {
- FilterOffsets.push_back(Offset);
- Offset -= TargetAsmInfo::getULEB128Size(*I);
- }
-
- // Compute the actions table and gather the first action index for each
- // landing pad site.
- SmallVector<ActionEntry, 32> Actions;
- SmallVector<unsigned, 64> FirstActions;
- FirstActions.reserve(LandingPads.size());
-
- int FirstAction = 0;
- unsigned SizeActions = 0;
- for (unsigned i = 0, N = LandingPads.size(); i != N; ++i) {
- const LandingPadInfo *LP = LandingPads[i];
- const std::vector<int> &TypeIds = LP->TypeIds;
- const unsigned NumShared = i ? SharedTypeIds(LP, LandingPads[i-1]) : 0;
- unsigned SizeSiteActions = 0;
-
- if (NumShared < TypeIds.size()) {
- unsigned SizeAction = 0;
- ActionEntry *PrevAction = 0;
-
- if (NumShared) {
- const unsigned SizePrevIds = LandingPads[i-1]->TypeIds.size();
- assert(Actions.size());
- PrevAction = &Actions.back();
- SizeAction = TargetAsmInfo::getSLEB128Size(PrevAction->NextAction) +
- TargetAsmInfo::getSLEB128Size(PrevAction->ValueForTypeID);
- for (unsigned j = NumShared; j != SizePrevIds; ++j) {
- SizeAction -=
- TargetAsmInfo::getSLEB128Size(PrevAction->ValueForTypeID);
- SizeAction += -PrevAction->NextAction;
- PrevAction = PrevAction->Previous;
- }
- }
-
- // Compute the actions.
- for (unsigned I = NumShared, M = TypeIds.size(); I != M; ++I) {
- int TypeID = TypeIds[I];
- assert(-1-TypeID < (int)FilterOffsets.size() && "Unknown filter id!");
- int ValueForTypeID = TypeID < 0 ? FilterOffsets[-1 - TypeID] : TypeID;
- unsigned SizeTypeID = TargetAsmInfo::getSLEB128Size(ValueForTypeID);
-
- int NextAction = SizeAction ? -(SizeAction + SizeTypeID) : 0;
- SizeAction = SizeTypeID + TargetAsmInfo::getSLEB128Size(NextAction);
- SizeSiteActions += SizeAction;
-
- ActionEntry Action = {ValueForTypeID, NextAction, PrevAction};
- Actions.push_back(Action);
-
- PrevAction = &Actions.back();
- }
-
- // Record the first action of the landing pad site.
- FirstAction = SizeActions + SizeSiteActions - SizeAction + 1;
- } // else identical - re-use previous FirstAction
-
- FirstActions.push_back(FirstAction);
-
- // Compute this sites contribution to size.
- SizeActions += SizeSiteActions;
- }
-
- // Compute the call-site table. The entry for an invoke has a try-range
- // containing the call, a non-zero landing pad and an appropriate action.
- // The entry for an ordinary call has a try-range containing the call and
- // zero for the landing pad and the action. Calls marked 'nounwind' have
- // no entry and must not be contained in the try-range of any entry - they
- // form gaps in the table. Entries must be ordered by try-range address.
- SmallVector<CallSiteEntry, 64> CallSites;
-
- RangeMapType PadMap;
- // Invokes and nounwind calls have entries in PadMap (due to being bracketed
- // by try-range labels when lowered). Ordinary calls do not, so appropriate
- // try-ranges for them need be deduced.
- for (unsigned i = 0, N = LandingPads.size(); i != N; ++i) {
- const LandingPadInfo *LandingPad = LandingPads[i];
- for (unsigned j = 0, E = LandingPad->BeginLabels.size(); j != E; ++j) {
- unsigned BeginLabel = LandingPad->BeginLabels[j];
- assert(!PadMap.count(BeginLabel) && "Duplicate landing pad labels!");
- PadRange P = { i, j };
- PadMap[BeginLabel] = P;
- }
- }
-
- // The end label of the previous invoke or nounwind try-range.
- unsigned LastLabel = 0;
-
- // Whether there is a potentially throwing instruction (currently this means
- // an ordinary call) between the end of the previous try-range and now.
- bool SawPotentiallyThrowing = false;
-
- // Whether the last callsite entry was for an invoke.
- bool PreviousIsInvoke = false;
-
- // Visit all instructions in order of address.
- for (MachineFunction::const_iterator I = MF->begin(), E = MF->end();
- I != E; ++I) {
- for (MachineBasicBlock::const_iterator MI = I->begin(), E = I->end();
- MI != E; ++MI) {
- if (!MI->isLabel()) {
- SawPotentiallyThrowing |= MI->getDesc().isCall();
- continue;
- }
-
- unsigned BeginLabel = MI->getOperand(0).getImm();
- assert(BeginLabel && "Invalid label!");
-
- // End of the previous try-range?
- if (BeginLabel == LastLabel)
- SawPotentiallyThrowing = false;
-
- // Beginning of a new try-range?
- RangeMapType::iterator L = PadMap.find(BeginLabel);
- if (L == PadMap.end())
- // Nope, it was just some random label.
- continue;
-
- PadRange P = L->second;
- const LandingPadInfo *LandingPad = LandingPads[P.PadIndex];
-
- assert(BeginLabel == LandingPad->BeginLabels[P.RangeIndex] &&
- "Inconsistent landing pad map!");
-
- // If some instruction between the previous try-range and this one may
- // throw, create a call-site entry with no landing pad for the region
- // between the try-ranges.
- if (SawPotentiallyThrowing) {
- CallSiteEntry Site = {LastLabel, BeginLabel, 0, 0};
- CallSites.push_back(Site);
- PreviousIsInvoke = false;
- }
-
- LastLabel = LandingPad->EndLabels[P.RangeIndex];
- assert(BeginLabel && LastLabel && "Invalid landing pad!");
-
- if (LandingPad->LandingPadLabel) {
- // This try-range is for an invoke.
- CallSiteEntry Site = {BeginLabel, LastLabel,
- LandingPad->LandingPadLabel, FirstActions[P.PadIndex]};
-
- // Try to merge with the previous call-site.
- if (PreviousIsInvoke) {
- CallSiteEntry &Prev = CallSites.back();
- if (Site.PadLabel == Prev.PadLabel && Site.Action == Prev.Action) {
- // Extend the range of the previous entry.
- Prev.EndLabel = Site.EndLabel;
- continue;
- }
- }
-
- // Otherwise, create a new call-site.
- CallSites.push_back(Site);
- PreviousIsInvoke = true;
- } else {
- // Create a gap.
- PreviousIsInvoke = false;
- }
- }
- }
- // If some instruction between the previous try-range and the end of the
- // function may throw, create a call-site entry with no landing pad for the
- // region following the try-range.
- if (SawPotentiallyThrowing) {
- CallSiteEntry Site = {LastLabel, 0, 0, 0};
- CallSites.push_back(Site);
- }
-
- // Final tallies.
-
- // Call sites.
- const unsigned SiteStartSize = sizeof(int32_t); // DW_EH_PE_udata4
- const unsigned SiteLengthSize = sizeof(int32_t); // DW_EH_PE_udata4
- const unsigned LandingPadSize = sizeof(int32_t); // DW_EH_PE_udata4
- unsigned SizeSites = CallSites.size() * (SiteStartSize +
- SiteLengthSize +
- LandingPadSize);
- for (unsigned i = 0, e = CallSites.size(); i < e; ++i)
- SizeSites += TargetAsmInfo::getULEB128Size(CallSites[i].Action);
-
- // Type infos.
- const unsigned TypeInfoSize = TD->getPointerSize(); // DW_EH_PE_absptr
- unsigned SizeTypes = TypeInfos.size() * TypeInfoSize;
-
- unsigned TypeOffset = sizeof(int8_t) + // Call site format
- TargetAsmInfo::getULEB128Size(SizeSites) + // Call-site table length
- SizeSites + SizeActions + SizeTypes;
-
- unsigned TotalSize = sizeof(int8_t) + // LPStart format
- sizeof(int8_t) + // TType format
- TargetAsmInfo::getULEB128Size(TypeOffset) + // TType base offset
- TypeOffset;
-
- unsigned SizeAlign = (4 - TotalSize) & 3;
-
- // Begin the exception table.
- Asm->SwitchToDataSection(TAI->getDwarfExceptionSection());
- Asm->EmitAlignment(2, 0, 0, false);
- O << "GCC_except_table" << SubprogramCount << ":\n";
- for (unsigned i = 0; i != SizeAlign; ++i) {
- Asm->EmitInt8(0);
- Asm->EOL("Padding");
- }
- EmitLabel("exception", SubprogramCount);
-
- // Emit the header.
- Asm->EmitInt8(DW_EH_PE_omit);
- Asm->EOL("LPStart format (DW_EH_PE_omit)");
- Asm->EmitInt8(DW_EH_PE_absptr);
- Asm->EOL("TType format (DW_EH_PE_absptr)");
- Asm->EmitULEB128Bytes(TypeOffset);
- Asm->EOL("TType base offset");
- Asm->EmitInt8(DW_EH_PE_udata4);
- Asm->EOL("Call site format (DW_EH_PE_udata4)");
- Asm->EmitULEB128Bytes(SizeSites);
- Asm->EOL("Call-site table length");
-
- // Emit the landing pad site information.
- for (unsigned i = 0; i < CallSites.size(); ++i) {
- CallSiteEntry &S = CallSites[i];
- const char *BeginTag;
- unsigned BeginNumber;
-
- if (!S.BeginLabel) {
- BeginTag = "eh_func_begin";
- BeginNumber = SubprogramCount;
- } else {
- BeginTag = "label";
- BeginNumber = S.BeginLabel;
- }
-
- EmitSectionOffset(BeginTag, "eh_func_begin", BeginNumber, SubprogramCount,
- true, true);
- Asm->EOL("Region start");
-
- if (!S.EndLabel) {
- EmitDifference("eh_func_end", SubprogramCount, BeginTag, BeginNumber,
- true);
- } else {
- EmitDifference("label", S.EndLabel, BeginTag, BeginNumber, true);
- }
- Asm->EOL("Region length");
-
- if (!S.PadLabel)
- Asm->EmitInt32(0);
- else
- EmitSectionOffset("label", "eh_func_begin", S.PadLabel, SubprogramCount,
- true, true);
- Asm->EOL("Landing pad");
-
- Asm->EmitULEB128Bytes(S.Action);
- Asm->EOL("Action");
- }
-
- // Emit the actions.
- for (unsigned I = 0, N = Actions.size(); I != N; ++I) {
- ActionEntry &Action = Actions[I];
-
- Asm->EmitSLEB128Bytes(Action.ValueForTypeID);
- Asm->EOL("TypeInfo index");
- Asm->EmitSLEB128Bytes(Action.NextAction);
- Asm->EOL("Next action");
- }
-
- // Emit the type ids.
- for (unsigned M = TypeInfos.size(); M; --M) {
- GlobalVariable *GV = TypeInfos[M - 1];
-
- PrintRelDirective();
-
- if (GV)
- O << Asm->getGlobalLinkName(GV);
- else
- O << "0";
-
- Asm->EOL("TypeInfo");
- }
-
- // Emit the filter typeids.
- for (unsigned j = 0, M = FilterIds.size(); j < M; ++j) {
- unsigned TypeID = FilterIds[j];
- Asm->EmitULEB128Bytes(TypeID);
- Asm->EOL("Filter TypeInfo index");
- }
-
- Asm->EmitAlignment(2, 0, 0, false);
- }
-
-public:
- //===--------------------------------------------------------------------===//
- // Main entry points.
- //
- DwarfException(raw_ostream &OS, AsmPrinter *A, const TargetAsmInfo *T)
- : Dwarf(OS, A, T, "eh")
- , shouldEmitTable(false)
- , shouldEmitMoves(false)
- , shouldEmitTableModule(false)
- , shouldEmitMovesModule(false)
- {}
-
- virtual ~DwarfException() {}
-
- /// SetModuleInfo - Set machine module information when it's known that pass
- /// manager has created it. Set by the target AsmPrinter.
- void SetModuleInfo(MachineModuleInfo *mmi) {
- MMI = mmi;
- }
-
- /// BeginModule - Emit all exception information that should come prior to the
- /// content.
- void BeginModule(Module *M) {
- this->M = M;
- }
-
- /// EndModule - Emit all exception information that should come after the
- /// content.
- void EndModule() {
- if (shouldEmitMovesModule || shouldEmitTableModule) {
- const std::vector<Function *> Personalities = MMI->getPersonalities();
- for (unsigned i =0; i < Personalities.size(); ++i)
- EmitCommonEHFrame(Personalities[i], i);
-
- for (std::vector<FunctionEHFrameInfo>::iterator I = EHFrames.begin(),
- E = EHFrames.end(); I != E; ++I)
- EmitEHFrame(*I);
- }
- }
-
- /// BeginFunction - Gather pre-function exception information. Assumes being
- /// emitted immediately after the function entry point.
- void BeginFunction(MachineFunction *MF) {
- this->MF = MF;
- shouldEmitTable = shouldEmitMoves = false;
- if (MMI && TAI->doesSupportExceptionHandling()) {
-
- // Map all labels and get rid of any dead landing pads.
- MMI->TidyLandingPads();
- // If any landing pads survive, we need an EH table.
- if (MMI->getLandingPads().size())
- shouldEmitTable = true;
-
- // See if we need frame move info.
- if (!MF->getFunction()->doesNotThrow() || UnwindTablesMandatory)
- shouldEmitMoves = true;
-
- if (shouldEmitMoves || shouldEmitTable)
- // Assumes in correct section after the entry point.
- EmitLabel("eh_func_begin", ++SubprogramCount);
- }
- shouldEmitTableModule |= shouldEmitTable;
- shouldEmitMovesModule |= shouldEmitMoves;
- }
-
- /// EndFunction - Gather and emit post-function exception information.
- ///
- void EndFunction() {
- if (shouldEmitMoves || shouldEmitTable) {
- EmitLabel("eh_func_end", SubprogramCount);
- EmitExceptionTable();
-
- // Save EH frame information
- EHFrames.
- push_back(FunctionEHFrameInfo(getAsm()->getCurrentFunctionEHName(MF),
- SubprogramCount,
- MMI->getPersonalityIndex(),
- MF->getFrameInfo()->hasCalls(),
- !MMI->getLandingPads().empty(),
- MMI->getFrameMoves(),
- MF->getFunction()));
- }
- }
-};
-
-} // End of namespace llvm
-
-//===----------------------------------------------------------------------===//
-
-/// Emit - Print the abbreviation using the specified Dwarf writer.
-///
-void DIEAbbrev::Emit(const DwarfDebug &DD) const {
- // Emit its Dwarf tag type.
- DD.getAsm()->EmitULEB128Bytes(Tag);
- DD.getAsm()->EOL(TagString(Tag));
-
- // Emit whether it has children DIEs.
- DD.getAsm()->EmitULEB128Bytes(ChildrenFlag);
- DD.getAsm()->EOL(ChildrenString(ChildrenFlag));
-
- // For each attribute description.
- for (unsigned i = 0, N = Data.size(); i < N; ++i) {
- const DIEAbbrevData &AttrData = Data[i];
-
- // Emit attribute type.
- DD.getAsm()->EmitULEB128Bytes(AttrData.getAttribute());
- DD.getAsm()->EOL(AttributeString(AttrData.getAttribute()));
-
- // Emit form type.
- DD.getAsm()->EmitULEB128Bytes(AttrData.getForm());
- DD.getAsm()->EOL(FormEncodingString(AttrData.getForm()));
- }
-
- // Mark end of abbreviation.
- DD.getAsm()->EmitULEB128Bytes(0); DD.getAsm()->EOL("EOM(1)");
- DD.getAsm()->EmitULEB128Bytes(0); DD.getAsm()->EOL("EOM(2)");
-}
-
-#ifndef NDEBUG
-void DIEAbbrev::print(std::ostream &O) {
- O << "Abbreviation @"
- << std::hex << (intptr_t)this << std::dec
- << " "
- << TagString(Tag)
- << " "
- << ChildrenString(ChildrenFlag)
- << "\n";
-
- for (unsigned i = 0, N = Data.size(); i < N; ++i) {
- O << " "
- << AttributeString(Data[i].getAttribute())
- << " "
- << FormEncodingString(Data[i].getForm())
- << "\n";
- }
-}
-void DIEAbbrev::dump() { print(cerr); }
-#endif
-
-//===----------------------------------------------------------------------===//
-
-#ifndef NDEBUG
-void DIEValue::dump() {
- print(cerr);
-}
-#endif
-
-//===----------------------------------------------------------------------===//
-
-/// EmitValue - Emit integer of appropriate size.
-///
-void DIEInteger::EmitValue(DwarfDebug &DD, unsigned Form) {
- switch (Form) {
- case DW_FORM_flag: // Fall thru
- case DW_FORM_ref1: // Fall thru
- case DW_FORM_data1: DD.getAsm()->EmitInt8(Integer); break;
- case DW_FORM_ref2: // Fall thru
- case DW_FORM_data2: DD.getAsm()->EmitInt16(Integer); break;
- case DW_FORM_ref4: // Fall thru
- case DW_FORM_data4: DD.getAsm()->EmitInt32(Integer); break;
- case DW_FORM_ref8: // Fall thru
- case DW_FORM_data8: DD.getAsm()->EmitInt64(Integer); break;
- case DW_FORM_udata: DD.getAsm()->EmitULEB128Bytes(Integer); break;
- case DW_FORM_sdata: DD.getAsm()->EmitSLEB128Bytes(Integer); break;
- default: assert(0 && "DIE Value form not supported yet"); break;
- }
-}
-
-/// SizeOf - Determine size of integer value in bytes.
-///
-unsigned DIEInteger::SizeOf(const DwarfDebug &DD, unsigned Form) const {
- switch (Form) {
- case DW_FORM_flag: // Fall thru
- case DW_FORM_ref1: // Fall thru
- case DW_FORM_data1: return sizeof(int8_t);
- case DW_FORM_ref2: // Fall thru
- case DW_FORM_data2: return sizeof(int16_t);
- case DW_FORM_ref4: // Fall thru
- case DW_FORM_data4: return sizeof(int32_t);
- case DW_FORM_ref8: // Fall thru
- case DW_FORM_data8: return sizeof(int64_t);
- case DW_FORM_udata: return TargetAsmInfo::getULEB128Size(Integer);
- case DW_FORM_sdata: return TargetAsmInfo::getSLEB128Size(Integer);
- default: assert(0 && "DIE Value form not supported yet"); break;
- }
- return 0;
-}
-
-//===----------------------------------------------------------------------===//
-
-/// EmitValue - Emit string value.
-///
-void DIEString::EmitValue(DwarfDebug &DD, unsigned Form) {
- DD.getAsm()->EmitString(String);
-}
-
-//===----------------------------------------------------------------------===//
-
-/// EmitValue - Emit label value.
-///
-void DIEDwarfLabel::EmitValue(DwarfDebug &DD, unsigned Form) {
- bool IsSmall = Form == DW_FORM_data4;
- DD.EmitReference(Label, false, IsSmall);
-}
-
-/// SizeOf - Determine size of label value in bytes.
-///
-unsigned DIEDwarfLabel::SizeOf(const DwarfDebug &DD, unsigned Form) const {
- if (Form == DW_FORM_data4) return 4;
- return DD.getTargetData()->getPointerSize();
-}
-
-//===----------------------------------------------------------------------===//
-
-/// EmitValue - Emit label value.
-///
-void DIEObjectLabel::EmitValue(DwarfDebug &DD, unsigned Form) {
- bool IsSmall = Form == DW_FORM_data4;
- DD.EmitReference(Label, false, IsSmall);
-}
-
-/// SizeOf - Determine size of label value in bytes.
-///
-unsigned DIEObjectLabel::SizeOf(const DwarfDebug &DD, unsigned Form) const {
- if (Form == DW_FORM_data4) return 4;
- return DD.getTargetData()->getPointerSize();
-}
-
-//===----------------------------------------------------------------------===//
-
-/// EmitValue - Emit delta value.
-///
-void DIESectionOffset::EmitValue(DwarfDebug &DD, unsigned Form) {
- bool IsSmall = Form == DW_FORM_data4;
- DD.EmitSectionOffset(Label.Tag, Section.Tag,
- Label.Number, Section.Number, IsSmall, IsEH, UseSet);
-}
-
-/// SizeOf - Determine size of delta value in bytes.
-///
-unsigned DIESectionOffset::SizeOf(const DwarfDebug &DD, unsigned Form) const {
- if (Form == DW_FORM_data4) return 4;
- return DD.getTargetData()->getPointerSize();
-}
-
-//===----------------------------------------------------------------------===//
-
-/// EmitValue - Emit delta value.
-///
-void DIEDelta::EmitValue(DwarfDebug &DD, unsigned Form) {
- bool IsSmall = Form == DW_FORM_data4;
- DD.EmitDifference(LabelHi, LabelLo, IsSmall);
-}
-
-/// SizeOf - Determine size of delta value in bytes.
-///
-unsigned DIEDelta::SizeOf(const DwarfDebug &DD, unsigned Form) const {
- if (Form == DW_FORM_data4) return 4;
- return DD.getTargetData()->getPointerSize();
-}
-
-//===----------------------------------------------------------------------===//
-
-/// EmitValue - Emit debug information entry offset.
-///
-void DIEntry::EmitValue(DwarfDebug &DD, unsigned Form) {
- DD.getAsm()->EmitInt32(Entry->getOffset());
-}
-
-//===----------------------------------------------------------------------===//
-
-/// ComputeSize - calculate the size of the block.
-///
-unsigned DIEBlock::ComputeSize(DwarfDebug &DD) {
- if (!Size) {
- const SmallVector<DIEAbbrevData, 8> &AbbrevData = Abbrev.getData();
-
- for (unsigned i = 0, N = Values.size(); i < N; ++i) {
- Size += Values[i]->SizeOf(DD, AbbrevData[i].getForm());
- }
- }
- return Size;
-}
-
-/// EmitValue - Emit block data.
-///
-void DIEBlock::EmitValue(DwarfDebug &DD, unsigned Form) {
- switch (Form) {
- case DW_FORM_block1: DD.getAsm()->EmitInt8(Size); break;
- case DW_FORM_block2: DD.getAsm()->EmitInt16(Size); break;
- case DW_FORM_block4: DD.getAsm()->EmitInt32(Size); break;
- case DW_FORM_block: DD.getAsm()->EmitULEB128Bytes(Size); break;
- default: assert(0 && "Improper form for block"); break;
- }
-
- const SmallVector<DIEAbbrevData, 8> &AbbrevData = Abbrev.getData();
-
- for (unsigned i = 0, N = Values.size(); i < N; ++i) {
- DD.getAsm()->EOL();
- Values[i]->EmitValue(DD, AbbrevData[i].getForm());
- }
-}
-
-/// SizeOf - Determine size of block data in bytes.
-///
-unsigned DIEBlock::SizeOf(const DwarfDebug &DD, unsigned Form) const {
- switch (Form) {
- case DW_FORM_block1: return Size + sizeof(int8_t);
- case DW_FORM_block2: return Size + sizeof(int16_t);
- case DW_FORM_block4: return Size + sizeof(int32_t);
- case DW_FORM_block: return Size + TargetAsmInfo::getULEB128Size(Size);
- default: assert(0 && "Improper form for block"); break;
- }
- return 0;
-}
-
-//===----------------------------------------------------------------------===//
-/// DIE Implementation
-
-DIE::~DIE() {
- for (unsigned i = 0, N = Children.size(); i < N; ++i)
- delete Children[i];
-}
-
-/// AddSiblingOffset - Add a sibling offset field to the front of the DIE.
-///
-void DIE::AddSiblingOffset() {
- DIEInteger *DI = new DIEInteger(0);
- Values.insert(Values.begin(), DI);
- Abbrev.AddFirstAttribute(DW_AT_sibling, DW_FORM_ref4);
-}
-
-/// Profile - Used to gather unique data for the value folding set.
-///
-void DIE::Profile(FoldingSetNodeID &ID) {
- Abbrev.Profile(ID);
-
- for (unsigned i = 0, N = Children.size(); i < N; ++i)
- ID.AddPointer(Children[i]);
-
- for (unsigned j = 0, M = Values.size(); j < M; ++j)
- ID.AddPointer(Values[j]);
-}
-
-#ifndef NDEBUG
-void DIE::print(std::ostream &O, unsigned IncIndent) {
- static unsigned IndentCount = 0;
- IndentCount += IncIndent;
- const std::string Indent(IndentCount, ' ');
- bool isBlock = Abbrev.getTag() == 0;
-
- if (!isBlock) {
- O << Indent
- << "Die: "
- << "0x" << std::hex << (intptr_t)this << std::dec
- << ", Offset: " << Offset
- << ", Size: " << Size
- << "\n";
-
- O << Indent
- << TagString(Abbrev.getTag())
- << " "
- << ChildrenString(Abbrev.getChildrenFlag());
- } else {
- O << "Size: " << Size;
- }
- O << "\n";
-
- const SmallVector<DIEAbbrevData, 8> &Data = Abbrev.getData();
-
- IndentCount += 2;
- for (unsigned i = 0, N = Data.size(); i < N; ++i) {
- O << Indent;
-
- if (!isBlock)
- O << AttributeString(Data[i].getAttribute());
- else
- O << "Blk[" << i << "]";
-
- O << " "
- << FormEncodingString(Data[i].getForm())
- << " ";
- Values[i]->print(O);
- O << "\n";
- }
- IndentCount -= 2;
-
- for (unsigned j = 0, M = Children.size(); j < M; ++j) {
- Children[j]->print(O, 4);
- }
-
- if (!isBlock) O << "\n";
- IndentCount -= IncIndent;
-}
+using namespace llvm;
-void DIE::dump() {
- print(cerr);
-}
-#endif
+static RegisterPass<DwarfWriter>
+X("dwarfwriter", "DWARF Information Writer");
+char DwarfWriter::ID = 0;
//===----------------------------------------------------------------------===//
/// DwarfWriter Implementation
///
-DwarfWriter::DwarfWriter() : ImmutablePass(&ID), DD(NULL), DE(NULL) {
-}
+DwarfWriter::DwarfWriter()
+ : ImmutablePass(&ID), DD(0), DE(0) {}
DwarfWriter::~DwarfWriter() {
delete DE;
const TargetAsmInfo *T) {
DE = new DwarfException(OS, A, T);
DD = new DwarfDebug(OS, A, T);
- DE->BeginModule(M);
- DD->BeginModule(M);
- DD->SetDebugInfo(MMI);
- DE->SetModuleInfo(MMI);
+ DE->BeginModule(M, MMI);
+ DD->BeginModule(M, MMI);
}
/// EndModule - Emit all Dwarf sections that should come after the content.
MMI->EndFunction();
}
-/// ValidDebugInfo - Return true if V represents valid debug info value.
-bool DwarfWriter::ValidDebugInfo(Value *V) {
- return DD && DD->ValidDebugInfo(V);
-}
-
/// RecordSourceLine - Records location information and associates it with a
/// label. Returns a unique label ID used to generate a label and provide
/// correspondence to the source line list.
unsigned DwarfWriter::RecordSourceLine(unsigned Line, unsigned Col,
- unsigned Src) {
- return DD->RecordSourceLine(Line, Col, Src);
-}
-
-/// RecordSource - Register a source file with debug info. Returns an source
-/// ID.
-unsigned DwarfWriter::RecordSource(const std::string &Dir,
- const std::string &File) {
- return DD->RecordSource(Dir, File);
+ DICompileUnit CU) {
+ return DD->RecordSourceLine(Line, Col, CU);
}
/// RecordRegionStart - Indicate the start of a region.
/// RecordVariable - Indicate the declaration of a local variable.
///
-void DwarfWriter::RecordVariable(GlobalVariable *GV, unsigned FrameIndex) {
- DD->RecordVariable(GV, FrameIndex);
+void DwarfWriter::RecordVariable(GlobalVariable *GV, unsigned FrameIndex,
+ const MachineInstr *MI) {
+ DD->RecordVariable(GV, FrameIndex, MI);
+}
+
+/// ShouldEmitDwarfDebug - Returns true if Dwarf debugging declarations should
+/// be emitted.
+bool DwarfWriter::ShouldEmitDwarfDebug() const {
+ return DD && DD->ShouldEmitDwarfDebug();
+}
+
+//// RecordInlinedFnStart - Global variable GV is inlined at the location marked
+//// by LabelID label.
+unsigned DwarfWriter::RecordInlinedFnStart(DISubprogram SP, DICompileUnit CU,
+ unsigned Line, unsigned Col) {
+ return DD->RecordInlinedFnStart(SP, CU, Line, Col);
+}
+
+/// RecordInlinedFnEnd - Indicate the end of inlined subroutine.
+unsigned DwarfWriter::RecordInlinedFnEnd(DISubprogram SP) {
+ return DD->RecordInlinedFnEnd(SP);
}
+/// RecordVariableScope - Record scope for the variable declared by
+/// DeclareMI. DeclareMI must describe TargetInstrInfo::DECLARE.
+void DwarfWriter::RecordVariableScope(DIVariable &DV,
+ const MachineInstr *DeclareMI) {
+ DD->RecordVariableScope(DV, DeclareMI);
+}
projects / oota-llvm.git / blobdiff