[llvm-commits] [llvm] r71854 - in /llvm/trunk/lib/CodeGen/AsmPrinter: DIE.h DwarfDebug.cpp DwarfDebug.h DwarfException.h DwarfLabel.h DwarfPrinter.h DwarfWriter.cpp
Bill Wendling
isanbard at gmail.com
Fri May 15 02:24:03 PDT 2009
Author: void
Date: Fri May 15 04:23:25 2009
New Revision: 71854
URL: http://llvm.org/viewvc/llvm-project?rev=71854&view=rev
Log:
Split out the DwarfDebug module from the DwarfWriter module.
Again, no intendtional functionality change.
Added:
llvm/trunk/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
llvm/trunk/lib/CodeGen/AsmPrinter/DwarfDebug.h
Modified:
llvm/trunk/lib/CodeGen/AsmPrinter/DIE.h
llvm/trunk/lib/CodeGen/AsmPrinter/DwarfException.h
llvm/trunk/lib/CodeGen/AsmPrinter/DwarfLabel.h
llvm/trunk/lib/CodeGen/AsmPrinter/DwarfPrinter.h
llvm/trunk/lib/CodeGen/AsmPrinter/DwarfWriter.cpp
Modified: llvm/trunk/lib/CodeGen/AsmPrinter/DIE.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/AsmPrinter/DIE.h?rev=71854&r1=71853&r2=71854&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/AsmPrinter/DIE.h (original)
+++ llvm/trunk/lib/CodeGen/AsmPrinter/DIE.h Fri May 15 04:23:25 2009
@@ -11,8 +11,8 @@
//
//===----------------------------------------------------------------------===//
-#ifndef DIE_H__
-#define DIE_H__
+#ifndef CODEGEN_ASMPRINTER_DIE_H__
+#define CODEGEN_ASMPRINTER_DIE_H__
#include "DwarfLabel.h"
#include "llvm/ADT/FoldingSet.h"
Added: llvm/trunk/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/AsmPrinter/DwarfDebug.cpp?rev=71854&view=auto
==============================================================================
--- llvm/trunk/lib/CodeGen/AsmPrinter/DwarfDebug.cpp (added)
+++ llvm/trunk/lib/CodeGen/AsmPrinter/DwarfDebug.cpp Fri May 15 04:23:25 2009
@@ -0,0 +1,2613 @@
+//===-- llvm/CodeGen/DwarfDebug.cpp - Dwarf Debug Framework ---------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file contains support for writing dwarf debug info into asm files.
+//
+//===----------------------------------------------------------------------===//
+
+#include "DwarfDebug.h"
+#include "llvm/Module.h"
+#include "llvm/CodeGen/MachineModuleInfo.h"
+#include "llvm/Support/Timer.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 <ostream>
+using namespace llvm;
+
+static TimerGroup &getDwarfTimerGroup() {
+ static TimerGroup DwarfTimerGroup("Dwarf Debugging");
+ return DwarfTimerGroup;
+}
+
+//===----------------------------------------------------------------------===//
+
+/// Configuration values for initial hash set sizes (log2).
+///
+static const unsigned InitDiesSetSize = 9; // log2(512)
+static const unsigned InitAbbreviationsSetSize = 9; // log2(512)
+static const unsigned InitValuesSetSize = 9; // log2(512)
+
+namespace llvm {
+
+//===----------------------------------------------------------------------===//
+/// CompileUnit - This dwarf writer support class manages information associate
+/// with a source file.
+class VISIBILITY_HIDDEN CompileUnit {
+ /// 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;
+
+ /// GVToDIEEntryMap - Tracks the mapping of unit level debug informaton
+ /// descriptors to debug information entries using a DIEEntry proxy.
+ std::map<GlobalVariable *, DIEEntry *> GVToDIEEntryMap;
+
+ /// Globals - A map of globally visible named entities for this unit.
+ ///
+ StringMap<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(),
+ GVToDIEEntryMap(), Globals(), DiesSet(InitDiesSetSize)
+ {}
+
+ ~CompileUnit() {
+ delete Die;
+ }
+
+ // Accessors.
+ unsigned getID() const { return ID; }
+ DIE* getDie() const { return Die; }
+ StringMap<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];
+ }
+
+ /// getDIEEntrySlotFor - Returns the debug information entry proxy slot for the
+ /// specified debug variable.
+ DIEEntry *&getDIEEntrySlotFor(GlobalVariable *GV) {
+ return GVToDIEEntryMap[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;
+ }
+};
+
+//===----------------------------------------------------------------------===//
+/// DbgVariable - This class is used to track local variable information.
+///
+class VISIBILITY_HIDDEN DbgVariable {
+ 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 DbgConcreteScope;
+class VISIBILITY_HIDDEN DbgScope {
+ 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.
+ SmallVector<DbgConcreteScope *, 8> ConcreteInsts;// Concrete insts of funcs.
+public:
+ DbgScope(DbgScope *P, DIDescriptor D)
+ : Parent(P), Desc(D), StartLabelID(0), EndLabelID(0) {}
+ virtual ~DbgScope();
+
+ // 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; }
+ SmallVector<DbgConcreteScope*,8> &getConcreteInsts() { return ConcreteInsts; }
+ 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); }
+
+ /// AddConcreteInst - Add a concrete instance to the scope.
+ ///
+ void AddConcreteInst(DbgConcreteScope *C) { ConcreteInsts.push_back(C); }
+
+#ifndef NDEBUG
+ void dump() const;
+#endif
+};
+
+#ifndef NDEBUG
+void DbgScope::dump() const {
+ static unsigned IndentLevel = 0;
+ std::string Indent(IndentLevel, ' ');
+
+ cerr << Indent; Desc.dump();
+ cerr << " [" << StartLabelID << ", " << EndLabelID << "]\n";
+
+ IndentLevel += 2;
+
+ for (unsigned i = 0, e = Scopes.size(); i != e; ++i)
+ if (Scopes[i] != this)
+ Scopes[i]->dump();
+
+ IndentLevel -= 2;
+}
+#endif
+
+//===----------------------------------------------------------------------===//
+/// DbgConcreteScope - This class is used to track a scope that holds concrete
+/// instance information.
+///
+class VISIBILITY_HIDDEN DbgConcreteScope : public DbgScope {
+ CompileUnit *Unit;
+ DIE *Die; // Debug info for this concrete scope.
+public:
+ DbgConcreteScope(DIDescriptor D) : DbgScope(NULL, D) {}
+
+ // Accessors.
+ DIE *getDie() const { return Die; }
+ void setDie(DIE *D) { Die = D; }
+};
+
+DbgScope::~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];
+ for (unsigned k = 0, O = ConcreteInsts.size(); k < O; ++k)
+ delete ConcreteInsts[k];
+}
+
+} // end llvm namespace
+
+DwarfDebug::DwarfDebug(raw_ostream &OS, AsmPrinter *A, const TargetAsmInfo *T)
+ : Dwarf(OS, A, T, "dbg"), MainCU(0),
+ AbbreviationsSet(InitAbbreviationsSetSize), Abbreviations(),
+ ValuesSet(InitValuesSetSize), Values(), StringPool(), SectionMap(),
+ SectionSourceLines(), didInitial(false), shouldEmit(false),
+ FunctionDbgScope(0), DebugTimer(0) {
+ if (TimePassesIsEnabled)
+ DebugTimer = new Timer("Dwarf Debug Writer",
+ getDwarfTimerGroup());
+}
+DwarfDebug::~DwarfDebug() {
+ for (unsigned j = 0, M = Values.size(); j < M; ++j)
+ delete Values[j];
+
+ for (DenseMap<const GlobalVariable *, DbgScope *>::iterator
+ I = AbstractInstanceRootMap.begin(),
+ E = AbstractInstanceRootMap.end(); I != E;++I)
+ delete I->second;
+
+ delete DebugTimer;
+}
+
+/// AssignAbbrevNumber - Define a unique number for the abbreviation.
+///
+void DwarfDebug::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());
+ }
+}
+
+/// NewDIEEntry - Creates a new DIEEntry to be a proxy for a debug information
+/// entry.
+DIEEntry *DwarfDebug::NewDIEEntry(DIE *Entry) {
+ DIEEntry *Value;
+
+ if (Entry) {
+ FoldingSetNodeID ID;
+ DIEEntry::Profile(ID, Entry);
+ void *Where;
+ Value = static_cast<DIEEntry *>(ValuesSet.FindNodeOrInsertPos(ID, Where));
+
+ if (Value) return Value;
+
+ Value = new DIEEntry(Entry);
+ ValuesSet.InsertNode(Value, Where);
+ } else {
+ Value = new DIEEntry(Entry);
+ }
+
+ Values.push_back(Value);
+ return Value;
+}
+
+/// SetDIEEntry - Set a DIEEntry once the debug information entry is defined.
+///
+void DwarfDebug::SetDIEEntry(DIEEntry *Value, DIE *Entry) {
+ Value->setEntry(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 DwarfDebug::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 DwarfDebug::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 string attribute data and value.
+///
+void DwarfDebug::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 DwarfDebug::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 DwarfDebug::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 DwarfDebug::AddSectionOffset(DIE *Die, unsigned Attribute, unsigned Form,
+ const DWLabel &Label, const DWLabel &Section,
+ bool isEH, bool useSet) {
+ 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 DwarfDebug::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);
+}
+
+/// AddBlock - Add block data.
+///
+void DwarfDebug::AddBlock(DIE *Die, unsigned Attribute, unsigned Form,
+ DIEBlock *Block) {
+ Block->ComputeSize(TD);
+ 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);
+}
+
+/// AddSourceLine - Add location information to specified debug information
+/// entry.
+void DwarfDebug::AddSourceLine(DIE *Die, const DIVariable *V) {
+ // If there is no compile unit specified, don't add a line #.
+ if (V->getCompileUnit().isNull())
+ return;
+
+ unsigned Line = V->getLineNumber();
+ unsigned FileID = FindCompileUnit(V->getCompileUnit()).getID();
+ assert(FileID && "Invalid file id");
+ AddUInt(Die, dwarf::DW_AT_decl_file, 0, FileID);
+ AddUInt(Die, dwarf::DW_AT_decl_line, 0, Line);
+}
+
+/// AddSourceLine - Add location information to specified debug information
+/// entry.
+void DwarfDebug::AddSourceLine(DIE *Die, const DIGlobal *G) {
+ // If there is no compile unit specified, don't add a line #.
+ if (G->getCompileUnit().isNull())
+ return;
+
+ unsigned Line = G->getLineNumber();
+ unsigned FileID = FindCompileUnit(G->getCompileUnit()).getID();
+ assert(FileID && "Invalid file id");
+ AddUInt(Die, dwarf::DW_AT_decl_file, 0, FileID);
+ AddUInt(Die, dwarf::DW_AT_decl_line, 0, Line);
+}
+void DwarfDebug::AddSourceLine(DIE *Die, const DIType *Ty) {
+ // If there is no compile unit specified, don't add a line #.
+ DICompileUnit CU = Ty->getCompileUnit();
+ if (CU.isNull())
+ return;
+
+ unsigned Line = Ty->getLineNumber();
+ unsigned FileID = FindCompileUnit(CU).getID();
+ assert(FileID && "Invalid file id");
+ AddUInt(Die, dwarf::DW_AT_decl_file, 0, FileID);
+ AddUInt(Die, dwarf::DW_AT_decl_line, 0, Line);
+}
+
+/// AddAddress - Add an address attribute to a die based on the location
+/// provided.
+void DwarfDebug::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, dwarf::DW_FORM_data1, dwarf::DW_OP_reg0 + Reg);
+ } else {
+ AddUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_regx);
+ AddUInt(Block, 0, dwarf::DW_FORM_udata, Reg);
+ }
+ } else {
+ if (Reg < 32) {
+ AddUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_breg0 + Reg);
+ } else {
+ AddUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_bregx);
+ AddUInt(Block, 0, dwarf::DW_FORM_udata, Reg);
+ }
+
+ AddUInt(Block, 0, dwarf::DW_FORM_sdata, Location.getOffset());
+ }
+
+ AddBlock(Die, Attribute, 0, Block);
+}
+
+/// AddType - Add a new type attribute to the specified entity.
+void DwarfDebug::AddType(CompileUnit *DW_Unit, DIE *Entity, DIType Ty) {
+ if (Ty.isNull())
+ return;
+
+ // Check for pre-existence.
+ DIEEntry *&Slot = DW_Unit->getDIEEntrySlotFor(Ty.getGV());
+
+ // If it exists then use the existing value.
+ if (Slot) {
+ Entity->AddValue(dwarf::DW_AT_type, dwarf::DW_FORM_ref4, Slot);
+ return;
+ }
+
+ // Set up proxy.
+ Slot = NewDIEEntry();
+
+ // Construct type.
+ DIE Buffer(dwarf::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 appropriate context.
+ DIE *Die = NULL;
+ DIDescriptor Context = Ty.getContext();
+ if (!Context.isNull())
+ Die = DW_Unit->getDieMapSlotFor(Context.getGV());
+
+ if (Die) {
+ DIE *Child = new DIE(Buffer);
+ Die->AddChild(Child);
+ Buffer.Detach();
+ SetDIEEntry(Slot, Child);
+ } else {
+ Die = DW_Unit->AddDie(Buffer);
+ SetDIEEntry(Slot, Die);
+ }
+
+ Entity->AddValue(dwarf::DW_AT_type, dwarf::DW_FORM_ref4, Slot);
+}
+
+/// ConstructTypeDIE - Construct basic type die from DIBasicType.
+void DwarfDebug::ConstructTypeDIE(CompileUnit *DW_Unit, DIE &Buffer,
+ DIBasicType BTy) {
+ // Get core information.
+ std::string Name;
+ BTy.getName(Name);
+ Buffer.setTag(dwarf::DW_TAG_base_type);
+ AddUInt(&Buffer, dwarf::DW_AT_encoding, dwarf::DW_FORM_data1,
+ BTy.getEncoding());
+
+ // Add name if not anonymous or intermediate type.
+ if (!Name.empty())
+ AddString(&Buffer, dwarf::DW_AT_name, dwarf::DW_FORM_string, Name);
+ uint64_t Size = BTy.getSizeInBits() >> 3;
+ AddUInt(&Buffer, dwarf::DW_AT_byte_size, 0, Size);
+}
+
+/// ConstructTypeDIE - Construct derived type die from DIDerivedType.
+void DwarfDebug::ConstructTypeDIE(CompileUnit *DW_Unit, DIE &Buffer,
+ DIDerivedType DTy) {
+ // Get core information.
+ std::string Name;
+ DTy.getName(Name);
+ uint64_t Size = DTy.getSizeInBits() >> 3;
+ unsigned Tag = DTy.getTag();
+
+ // FIXME - Workaround for templates.
+ if (Tag == dwarf::DW_TAG_inheritance) Tag = dwarf::DW_TAG_reference_type;
+
+ Buffer.setTag(Tag);
+
+ // Map to main type, void will not have a type.
+ DIType FromTy = DTy.getTypeDerivedFrom();
+ AddType(DW_Unit, &Buffer, FromTy);
+
+ // Add name if not anonymous or intermediate type.
+ if (!Name.empty())
+ AddString(&Buffer, dwarf::DW_AT_name, dwarf::DW_FORM_string, Name);
+
+ // Add size if non-zero (derived types might be zero-sized.)
+ if (Size)
+ AddUInt(&Buffer, dwarf::DW_AT_byte_size, 0, Size);
+
+ // Add source line info if available and TyDesc is not a forward declaration.
+ if (!DTy.isForwardDecl())
+ AddSourceLine(&Buffer, &DTy);
+}
+
+/// ConstructTypeDIE - Construct type DIE from DICompositeType.
+void DwarfDebug::ConstructTypeDIE(CompileUnit *DW_Unit, DIE &Buffer,
+ DICompositeType CTy) {
+ // Get core information.
+ std::string Name;
+ CTy.getName(Name);
+
+ uint64_t Size = CTy.getSizeInBits() >> 3;
+ unsigned Tag = CTy.getTag();
+ Buffer.setTag(Tag);
+
+ switch (Tag) {
+ case dwarf::DW_TAG_vector_type:
+ case dwarf::DW_TAG_array_type:
+ ConstructArrayTypeDIE(DW_Unit, Buffer, &CTy);
+ break;
+ case dwarf::DW_TAG_enumeration_type: {
+ DIArray Elements = CTy.getTypeArray();
+
+ // Add enumerators to enumeration type.
+ for (unsigned i = 0, N = Elements.getNumElements(); i < N; ++i) {
+ DIE *ElemDie = NULL;
+ DIEnumerator Enum(Elements.getElement(i).getGV());
+ ElemDie = ConstructEnumTypeDIE(DW_Unit, &Enum);
+ Buffer.AddChild(ElemDie);
+ }
+ }
+ break;
+ case dwarf::DW_TAG_subroutine_type: {
+ // Add return type.
+ DIArray Elements = CTy.getTypeArray();
+ DIDescriptor RTy = Elements.getElement(0);
+ AddType(DW_Unit, &Buffer, DIType(RTy.getGV()));
+
+ // Add prototype flag.
+ AddUInt(&Buffer, dwarf::DW_AT_prototyped, dwarf::DW_FORM_flag, 1);
+
+ // Add arguments.
+ for (unsigned i = 1, N = Elements.getNumElements(); i < N; ++i) {
+ DIE *Arg = new DIE(dwarf::DW_TAG_formal_parameter);
+ DIDescriptor Ty = Elements.getElement(i);
+ AddType(DW_Unit, Arg, DIType(Ty.getGV()));
+ Buffer.AddChild(Arg);
+ }
+ }
+ break;
+ case dwarf::DW_TAG_structure_type:
+ case dwarf::DW_TAG_union_type:
+ case dwarf::DW_TAG_class_type: {
+ // Add elements to structure type.
+ DIArray Elements = CTy.getTypeArray();
+
+ // A forward struct declared type may not have elements available.
+ 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
+ ElemDie = CreateMemberDIE(DW_Unit,
+ DIDerivedType(Element.getGV()));
+ Buffer.AddChild(ElemDie);
+ }
+
+ // FIXME: We'd like an API to register additional attributes for the
+ // frontend to use while synthesizing, and then we'd use that api in clang
+ // instead of this.
+ if (Name == "__block_literal_generic")
+ AddUInt(&Buffer, dwarf::DW_AT_APPLE_block, dwarf::DW_FORM_flag, 1);
+
+ unsigned RLang = CTy.getRunTimeLang();
+ if (RLang)
+ AddUInt(&Buffer, dwarf::DW_AT_APPLE_runtime_class,
+ dwarf::DW_FORM_data1, RLang);
+ break;
+ }
+ default:
+ break;
+ }
+
+ // Add name if not anonymous or intermediate type.
+ if (!Name.empty())
+ AddString(&Buffer, dwarf::DW_AT_name, dwarf::DW_FORM_string, Name);
+
+ if (Tag == dwarf::DW_TAG_enumeration_type ||
+ Tag == dwarf::DW_TAG_structure_type || Tag == dwarf::DW_TAG_union_type) {
+ // Add size if non-zero (derived types might be zero-sized.)
+ if (Size)
+ AddUInt(&Buffer, dwarf::DW_AT_byte_size, 0, Size);
+ else {
+ // Add zero size if it is not a forward declaration.
+ if (CTy.isForwardDecl())
+ AddUInt(&Buffer, dwarf::DW_AT_declaration, dwarf::DW_FORM_flag, 1);
+ else
+ AddUInt(&Buffer, dwarf::DW_AT_byte_size, 0, 0);
+ }
+
+ // Add source line info if available.
+ if (!CTy.isForwardDecl())
+ AddSourceLine(&Buffer, &CTy);
+ }
+}
+
+/// ConstructSubrangeDIE - Construct subrange DIE from DISubrange.
+void DwarfDebug::ConstructSubrangeDIE(DIE &Buffer, DISubrange SR, DIE *IndexTy){
+ int64_t L = SR.getLo();
+ int64_t H = SR.getHi();
+ DIE *DW_Subrange = new DIE(dwarf::DW_TAG_subrange_type);
+
+ if (L != H) {
+ AddDIEEntry(DW_Subrange, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, IndexTy);
+ if (L)
+ AddSInt(DW_Subrange, dwarf::DW_AT_lower_bound, 0, L);
+ AddSInt(DW_Subrange, dwarf::DW_AT_upper_bound, 0, H);
+ }
+
+ Buffer.AddChild(DW_Subrange);
+}
+
+/// ConstructArrayTypeDIE - Construct array type DIE from DICompositeType.
+void DwarfDebug::ConstructArrayTypeDIE(CompileUnit *DW_Unit, DIE &Buffer,
+ DICompositeType *CTy) {
+ Buffer.setTag(dwarf::DW_TAG_array_type);
+ if (CTy->getTag() == dwarf::DW_TAG_vector_type)
+ AddUInt(&Buffer, dwarf::DW_AT_GNU_vector, dwarf::DW_FORM_flag, 1);
+
+ // Emit derived type.
+ AddType(DW_Unit, &Buffer, CTy->getTypeDerivedFrom());
+ DIArray Elements = CTy->getTypeArray();
+
+ // Construct an anonymous type for index type.
+ DIE IdxBuffer(dwarf::DW_TAG_base_type);
+ AddUInt(&IdxBuffer, dwarf::DW_AT_byte_size, 0, sizeof(int32_t));
+ AddUInt(&IdxBuffer, dwarf::DW_AT_encoding, dwarf::DW_FORM_data1,
+ dwarf::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 *DwarfDebug::ConstructEnumTypeDIE(CompileUnit *DW_Unit, DIEnumerator *ETy) {
+ DIE *Enumerator = new DIE(dwarf::DW_TAG_enumerator);
+ std::string Name;
+ ETy->getName(Name);
+ AddString(Enumerator, dwarf::DW_AT_name, dwarf::DW_FORM_string, Name);
+ int64_t Value = ETy->getEnumValue();
+ AddSInt(Enumerator, dwarf::DW_AT_const_value, dwarf::DW_FORM_sdata, Value);
+ return Enumerator;
+}
+
+/// CreateGlobalVariableDIE - Create new DIE using GV.
+DIE *DwarfDebug::CreateGlobalVariableDIE(CompileUnit *DW_Unit,
+ const DIGlobalVariable &GV) {
+ DIE *GVDie = new DIE(dwarf::DW_TAG_variable);
+ std::string Name;
+ GV.getDisplayName(Name);
+ AddString(GVDie, dwarf::DW_AT_name, dwarf::DW_FORM_string, Name);
+ std::string LinkageName;
+ GV.getLinkageName(LinkageName);
+ if (!LinkageName.empty())
+ AddString(GVDie, dwarf::DW_AT_MIPS_linkage_name, dwarf::DW_FORM_string,
+ LinkageName);
+ AddType(DW_Unit, GVDie, GV.getType());
+ if (!GV.isLocalToUnit())
+ AddUInt(GVDie, dwarf::DW_AT_external, dwarf::DW_FORM_flag, 1);
+ AddSourceLine(GVDie, &GV);
+ return GVDie;
+}
+
+/// CreateMemberDIE - Create new member DIE.
+DIE *DwarfDebug::CreateMemberDIE(CompileUnit *DW_Unit, const DIDerivedType &DT){
+ DIE *MemberDie = new DIE(DT.getTag());
+ std::string Name;
+ DT.getName(Name);
+ if (!Name.empty())
+ AddString(MemberDie, dwarf::DW_AT_name, dwarf::DW_FORM_string, Name);
+
+ AddType(DW_Unit, MemberDie, DT.getTypeDerivedFrom());
+
+ AddSourceLine(MemberDie, &DT);
+
+ uint64_t Size = DT.getSizeInBits();
+ uint64_t FieldSize = DT.getOriginalTypeSize();
+
+ if (Size != FieldSize) {
+ // Handle bitfield.
+ AddUInt(MemberDie, dwarf::DW_AT_byte_size, 0, DT.getOriginalTypeSize()>>3);
+ AddUInt(MemberDie, dwarf::DW_AT_bit_size, 0, DT.getSizeInBits());
+
+ uint64_t Offset = DT.getOffsetInBits();
+ uint64_t FieldOffset = Offset;
+ uint64_t AlignMask = ~(DT.getAlignInBits() - 1);
+ uint64_t HiMark = (Offset + FieldSize) & AlignMask;
+ FieldOffset = (HiMark - FieldSize);
+ Offset -= FieldOffset;
+
+ // Maybe we need to work from the other end.
+ if (TD->isLittleEndian()) Offset = FieldSize - (Offset + Size);
+ AddUInt(MemberDie, dwarf::DW_AT_bit_offset, 0, Offset);
+ }
+
+ DIEBlock *Block = new DIEBlock();
+ AddUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_plus_uconst);
+ AddUInt(Block, 0, dwarf::DW_FORM_udata, DT.getOffsetInBits() >> 3);
+ AddBlock(MemberDie, dwarf::DW_AT_data_member_location, 0, Block);
+
+ if (DT.isProtected())
+ AddUInt(MemberDie, dwarf::DW_AT_accessibility, 0,
+ dwarf::DW_ACCESS_protected);
+ else if (DT.isPrivate())
+ AddUInt(MemberDie, dwarf::DW_AT_accessibility, 0,
+ dwarf::DW_ACCESS_private);
+
+ return MemberDie;
+}
+
+/// CreateSubprogramDIE - Create new DIE using SP.
+DIE *DwarfDebug::CreateSubprogramDIE(CompileUnit *DW_Unit,
+ const DISubprogram &SP,
+ bool IsConstructor) {
+ DIE *SPDie = new DIE(dwarf::DW_TAG_subprogram);
+
+ std::string Name;
+ SP.getName(Name);
+ AddString(SPDie, dwarf::DW_AT_name, dwarf::DW_FORM_string, Name);
+
+ std::string LinkageName;
+ SP.getLinkageName(LinkageName);
+
+ if (!LinkageName.empty())
+ AddString(SPDie, dwarf::DW_AT_MIPS_linkage_name, dwarf::DW_FORM_string,
+ LinkageName);
+
+ AddSourceLine(SPDie, &SP);
+
+ DICompositeType SPTy = SP.getType();
+ DIArray Args = SPTy.getTypeArray();
+
+ // Add prototyped tag, if C or ObjC.
+ unsigned Lang = SP.getCompileUnit().getLanguage();
+ if (Lang == dwarf::DW_LANG_C99 || Lang == dwarf::DW_LANG_C89 ||
+ Lang == dwarf::DW_LANG_ObjC)
+ AddUInt(SPDie, dwarf::DW_AT_prototyped, dwarf::DW_FORM_flag, 1);
+
+ // Add Return Type.
+ unsigned SPTag = SPTy.getTag();
+ if (!IsConstructor) {
+ if (Args.isNull() || SPTag != dwarf::DW_TAG_subroutine_type)
+ AddType(DW_Unit, SPDie, SPTy);
+ else
+ AddType(DW_Unit, SPDie, DIType(Args.getElement(0).getGV()));
+ }
+
+ if (!SP.isDefinition()) {
+ AddUInt(SPDie, dwarf::DW_AT_declaration, dwarf::DW_FORM_flag, 1);
+
+ // Add arguments. Do not add arguments for subprogram definition. They will
+ // be handled through RecordVariable.
+ if (SPTag == dwarf::DW_TAG_subroutine_type)
+ for (unsigned i = 1, N = Args.getNumElements(); i < N; ++i) {
+ DIE *Arg = new DIE(dwarf::DW_TAG_formal_parameter);
+ AddType(DW_Unit, Arg, DIType(Args.getElement(i).getGV()));
+ AddUInt(Arg, dwarf::DW_AT_artificial, dwarf::DW_FORM_flag, 1); // ??
+ SPDie->AddChild(Arg);
+ }
+ }
+
+ if (!SP.isLocalToUnit())
+ AddUInt(SPDie, dwarf::DW_AT_external, dwarf::DW_FORM_flag, 1);
+
+ // DW_TAG_inlined_subroutine may refer to this DIE.
+ DIE *&Slot = DW_Unit->getDieMapSlotFor(SP.getGV());
+ Slot = SPDie;
+ return SPDie;
+}
+
+/// FindCompileUnit - Get the compile unit for the given descriptor.
+///
+CompileUnit &DwarfDebug::FindCompileUnit(DICompileUnit Unit) const {
+ DenseMap<Value *, CompileUnit *>::const_iterator I =
+ CompileUnitMap.find(Unit.getGV());
+ assert(I != CompileUnitMap.end() && "Missing compile unit.");
+ return *I->second;
+}
+
+/// NewDbgScopeVariable - Create a new scope variable.
+///
+DIE *DwarfDebug::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 dwarf::DW_TAG_return_variable:
+ return NULL;
+ case dwarf::DW_TAG_arg_variable:
+ Tag = dwarf::DW_TAG_formal_parameter;
+ break;
+ case dwarf::DW_TAG_auto_variable: // fall thru
+ default:
+ Tag = dwarf::DW_TAG_variable;
+ break;
+ }
+
+ // Define variable debug information entry.
+ DIE *VariableDie = new DIE(Tag);
+ std::string Name;
+ VD.getName(Name);
+ AddString(VariableDie, dwarf::DW_AT_name, dwarf::DW_FORM_string, Name);
+
+ // 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, dwarf::DW_AT_location, Location);
+
+ return VariableDie;
+}
+
+/// getOrCreateScope - Returns the scope associated with the given descriptor.
+///
+DbgScope *DwarfDebug::getOrCreateScope(GlobalVariable *V) {
+ DbgScope *&Slot = DbgScopeMap[V];
+ if (Slot) return Slot;
+
+ DbgScope *Parent = NULL;
+ DIBlock Block(V);
+
+ // Don't create a new scope if we already created one for an inlined function.
+ DenseMap<const GlobalVariable *, DbgScope *>::iterator
+ II = AbstractInstanceRootMap.find(V);
+ if (II != AbstractInstanceRootMap.end())
+ return LexicalScopeStack.back();
+
+ if (!Block.isNull()) {
+ DIDescriptor ParentDesc = Block.getContext();
+ Parent =
+ ParentDesc.isNull() ? NULL : getOrCreateScope(ParentDesc.getGV());
+ }
+
+ Slot = new DbgScope(Parent, DIDescriptor(V));
+
+ if (Parent)
+ Parent->AddScope(Slot);
+ else
+ // First function is top level function.
+ FunctionDbgScope = Slot;
+
+ return Slot;
+}
+
+/// ConstructDbgScope - Construct the components of a scope.
+///
+void DwarfDebug::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 concrete instances to scope.
+ SmallVector<DbgConcreteScope *, 8> &ConcreteInsts =
+ ParentScope->getConcreteInsts();
+ for (unsigned i = 0, N = ConcreteInsts.size(); i < N; ++i) {
+ DbgConcreteScope *ConcreteInst = ConcreteInsts[i];
+ DIE *Die = ConcreteInst->getDie();
+
+ unsigned StartID = ConcreteInst->getStartLabelID();
+ unsigned EndID = ConcreteInst->getEndLabelID();
+
+ // Add the scope bounds.
+ if (StartID)
+ AddLabel(Die, dwarf::DW_AT_low_pc, dwarf::DW_FORM_addr,
+ DWLabel("label", StartID));
+ else
+ AddLabel(Die, dwarf::DW_AT_low_pc, dwarf::DW_FORM_addr,
+ DWLabel("func_begin", SubprogramCount));
+
+ if (EndID)
+ AddLabel(Die, dwarf::DW_AT_high_pc, dwarf::DW_FORM_addr,
+ DWLabel("label", EndID));
+ else
+ AddLabel(Die, dwarf::DW_AT_high_pc, dwarf::DW_FORM_addr,
+ DWLabel("func_end", SubprogramCount));
+
+ ParentDie->AddChild(Die);
+ }
+
+ // 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];
+
+ unsigned StartID = MMI->MappedLabel(Scope->getStartLabelID());
+ unsigned EndID = MMI->MappedLabel(Scope->getEndLabelID());
+
+ // Ignore empty scopes.
+ if (StartID == EndID && StartID != 0) continue;
+
+ // Do not ignore inlined scopes even if they don't have any variables or
+ // scopes.
+ if (Scope->getScopes().empty() && Scope->getVariables().empty() &&
+ Scope->getConcreteInsts().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(dwarf::DW_TAG_lexical_block);
+
+ // Add the scope bounds.
+ if (StartID)
+ AddLabel(ScopeDie, dwarf::DW_AT_low_pc, dwarf::DW_FORM_addr,
+ DWLabel("label", StartID));
+ else
+ AddLabel(ScopeDie, dwarf::DW_AT_low_pc, dwarf::DW_FORM_addr,
+ DWLabel("func_begin", SubprogramCount));
+
+ if (EndID)
+ AddLabel(ScopeDie, dwarf::DW_AT_high_pc, dwarf::DW_FORM_addr,
+ DWLabel("label", EndID));
+ else
+ AddLabel(ScopeDie, dwarf::DW_AT_high_pc, dwarf::DW_FORM_addr,
+ DWLabel("func_end", SubprogramCount));
+
+ // Add the scope's contents.
+ ConstructDbgScope(Scope, StartID, EndID, ScopeDie, Unit);
+ ParentDie->AddChild(ScopeDie);
+ }
+ }
+}
+
+/// ConstructFunctionDbgScope - Construct the scope for the subprogram.
+///
+void DwarfDebug::ConstructFunctionDbgScope(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 = MainCU;
+ if (!Unit)
+ 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, dwarf::DW_AT_low_pc, dwarf::DW_FORM_addr,
+ DWLabel("func_begin", SubprogramCount));
+ AddLabel(SPDie, dwarf::DW_AT_high_pc, dwarf::DW_FORM_addr,
+ DWLabel("func_end", SubprogramCount));
+ MachineLocation Location(RI->getFrameRegister(*MF));
+ AddAddress(SPDie, dwarf::DW_AT_frame_base, Location);
+
+ ConstructDbgScope(RootScope, 0, 0, SPDie, Unit);
+}
+
+/// ConstructFunctionDbgScope - Construct the scope for the abstract debug
+/// scope.
+///
+void DwarfDebug::ConstructAbstractDbgScope(DbgScope *AbsScope) {
+ // Exit if there is no root scope.
+ if (!AbsScope) return;
+
+ DIDescriptor Desc = AbsScope->getDesc();
+ if (Desc.isNull())
+ return;
+
+ // Get the subprogram debug information entry.
+ DISubprogram SPD(Desc.getGV());
+
+ // Get the compile unit context.
+ CompileUnit *Unit = MainCU;
+ if (!Unit)
+ Unit = &FindCompileUnit(SPD.getCompileUnit());
+
+ // Get the subprogram die.
+ DIE *SPDie = Unit->getDieMapSlotFor(SPD.getGV());
+ assert(SPDie && "Missing subprogram descriptor");
+
+ ConstructDbgScope(AbsScope, 0, 0, SPDie, Unit);
+}
+
+/// ConstructDefaultDbgScope - Construct a default scope for the subprogram.
+///
+void DwarfDebug::ConstructDefaultDbgScope(MachineFunction *MF) {
+ const char *FnName = MF->getFunction()->getNameStart();
+ if (MainCU) {
+ StringMap<DIE*> &Globals = MainCU->getGlobals();
+ StringMap<DIE*>::iterator GI = Globals.find(FnName);
+ if (GI != Globals.end()) {
+ DIE *SPDie = GI->second;
+
+ // Add the function bounds.
+ AddLabel(SPDie, dwarf::DW_AT_low_pc, dwarf::DW_FORM_addr,
+ DWLabel("func_begin", SubprogramCount));
+ AddLabel(SPDie, dwarf::DW_AT_high_pc, dwarf::DW_FORM_addr,
+ DWLabel("func_end", SubprogramCount));
+
+ MachineLocation Location(RI->getFrameRegister(*MF));
+ AddAddress(SPDie, dwarf::DW_AT_frame_base, Location);
+ return;
+ }
+ } else {
+ for (unsigned i = 0, e = CompileUnits.size(); i != e; ++i) {
+ CompileUnit *Unit = CompileUnits[i];
+ StringMap<DIE*> &Globals = Unit->getGlobals();
+ StringMap<DIE*>::iterator GI = Globals.find(FnName);
+ if (GI != Globals.end()) {
+ DIE *SPDie = GI->second;
+
+ // Add the function bounds.
+ AddLabel(SPDie, dwarf::DW_AT_low_pc, dwarf::DW_FORM_addr,
+ DWLabel("func_begin", SubprogramCount));
+ AddLabel(SPDie, dwarf::DW_AT_high_pc, dwarf::DW_FORM_addr,
+ DWLabel("func_end", SubprogramCount));
+
+ MachineLocation Location(RI->getFrameRegister(*MF));
+ AddAddress(SPDie, dwarf::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 DwarfDebug::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);
+
+ if (TAI->doesSupportMacInfoSection()) {
+ 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 DwarfDebug::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 (Asm->isVerbose())
+ Asm->EOL(std::string("Abbrev [" +
+ utostr(AbbrevNumber) +
+ "] 0x" + utohexstr(Die->getOffset()) +
+ ":0x" + utohexstr(Die->getSize()) + " " +
+ dwarf::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 dwarf::DW_AT_sibling:
+ Asm->EmitInt32(Die->SiblingOffset());
+ break;
+ case dwarf::DW_AT_abstract_origin: {
+ DIEEntry *E = cast<DIEEntry>(Values[i]);
+ DIE *Origin = E->getEntry();
+ unsigned Addr =
+ CompileUnitOffsets[Die->getAbstractCompileUnit()] +
+ Origin->getOffset();
+
+ Asm->EmitInt32(Addr);
+ break;
+ }
+ default:
+ // Emit an attribute using the defined form.
+ Values[i]->EmitValue(this, Form);
+ break;
+ }
+
+ Asm->EOL(dwarf::AttributeString(Attr));
+ }
+
+ // Emit the DIE children if any.
+ if (Abbrev->getChildrenFlag() == dwarf::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 DwarfDebug::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(TD, AbbrevData[i].getForm());
+
+ // Size the DIE children if any.
+ if (!Children.empty()) {
+ assert(Abbrev->getChildrenFlag() == dwarf::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 DwarfDebug::SizeAndOffsets() {
+ // Compute size of compile unit header.
+ static 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)
+
+ // Process base compile unit.
+ if (MainCU) {
+ SizeAndOffsetDie(MainCU->getDie(), Offset, true);
+ CompileUnitOffsets[MainCU] = 0;
+ return;
+ }
+
+ // Process all compile units.
+ unsigned PrevOffset = 0;
+
+ for (unsigned i = 0, e = CompileUnits.size(); i != e; ++i) {
+ CompileUnit *Unit = CompileUnits[i];
+ CompileUnitOffsets[Unit] = PrevOffset;
+ PrevOffset += SizeAndOffsetDie(Unit->getDie(), Offset, true)
+ + sizeof(int32_t); // FIXME - extra pad for gdb bug.
+ }
+}
+
+/// EmitDebugInfo / EmitDebugInfoPerCU - Emit the debug info section.
+///
+void DwarfDebug::EmitDebugInfoPerCU(CompileUnit *Unit) {
+ 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::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();
+}
+
+void DwarfDebug::EmitDebugInfo() {
+ // Start debug info section.
+ Asm->SwitchToDataSection(TAI->getDwarfInfoSection());
+
+ if (MainCU) {
+ EmitDebugInfoPerCU(MainCU);
+ return;
+ }
+
+ for (unsigned i = 0, e = CompileUnits.size(); i != e; ++i)
+ EmitDebugInfoPerCU(CompileUnits[i]);
+}
+
+/// EmitAbbreviations - Emit the abbreviation section.
+///
+void DwarfDebug::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(Asm);
+
+ 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 DwarfDebug::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(dwarf::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 DwarfDebug::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 = -(dwarf::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::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 DI = 1, DE = getNumSourceDirectories()+1; DI != DE; ++DI) {
+ Asm->EmitString(getSourceDirectoryName(DI));
+ Asm->EOL("Directory");
+ }
+
+ Asm->EmitInt8(0); Asm->EOL("End of directories");
+
+ // Emit files.
+ for (unsigned SI = 1, SE = getNumSourceIds()+1; SI != SE; ++SI) {
+ // Remember source id starts at 1.
+ std::pair<unsigned, unsigned> Id = getSourceDirectoryAndFileIds(SI);
+ Asm->EmitString(getSourceFileName(Id.second));
+ Asm->EOL("Source");
+ Asm->EmitULEB128Bytes(Id.first);
+ 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 (Asm->isVerbose()) {
+ const Section* S = SectionMap[j + 1];
+ O << '\t' << TAI->getCommentString() << " Section"
+ << S->getName() << '\n';
+ } 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;
+
+ if (!Asm->isVerbose())
+ Asm->EOL();
+ else {
+ std::pair<unsigned, unsigned> SourceID =
+ getSourceDirectoryAndFileIds(LineInfo.getSourceID());
+ O << '\t' << TAI->getCommentString() << ' '
+ << getSourceDirectoryName(SourceID.first) << ' '
+ << getSourceFileName(SourceID.second)
+ <<" :" << utostr_32(LineInfo.getLine()) << '\n';
+ }
+
+ // Define the line address.
+ Asm->EmitInt8(0); Asm->EOL("Extended Op");
+ Asm->EmitInt8(TD->getPointerSize() + 1); Asm->EOL("Op size");
+ Asm->EmitInt8(dwarf::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(dwarf::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(dwarf::DW_LNS_advance_line);
+ Asm->EOL("DW_LNS_advance_line");
+ Asm->EmitSLEB128Bytes(Offset); Asm->EOL("Line Offset");
+ Asm->EmitInt8(dwarf::DW_LNS_copy); Asm->EOL("DW_LNS_copy");
+ }
+ } else {
+ // Copy the previous row (different address or source)
+ Asm->EmitInt8(dwarf::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 DwarfDebug::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)dwarf::DW_CIE_ID);
+ Asm->EOL("CIE Identifier Tag");
+ Asm->EmitInt8(dwarf::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
+DwarfDebug::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();
+}
+
+void DwarfDebug::EmitDebugPubNamesPerCU(CompileUnit *Unit) {
+ 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::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");
+
+ StringMap<DIE*> &Globals = Unit->getGlobals();
+ for (StringMap<DIE*>::const_iterator
+ GI = Globals.begin(), GE = Globals.end(); GI != GE; ++GI) {
+ const char *Name = GI->getKeyData();
+ DIE * Entity = GI->second;
+
+ Asm->EmitInt32(Entity->getOffset()); Asm->EOL("DIE offset");
+ Asm->EmitString(Name, strlen(Name)); Asm->EOL("External Name");
+ }
+
+ Asm->EmitInt32(0); Asm->EOL("End Mark");
+ EmitLabel("pubnames_end", Unit->getID());
+
+ Asm->EOL();
+}
+
+/// EmitDebugPubNames - Emit visible names into a debug pubnames section.
+///
+void DwarfDebug::EmitDebugPubNames() {
+ // Start the dwarf pubnames section.
+ Asm->SwitchToDataSection(TAI->getDwarfPubNamesSection());
+
+ if (MainCU) {
+ EmitDebugPubNamesPerCU(MainCU);
+ return;
+ }
+
+ for (unsigned i = 0, e = CompileUnits.size(); i != e; ++i)
+ EmitDebugPubNamesPerCU(CompileUnits[i]);
+}
+
+/// EmitDebugStr - Emit visible names into a debug str section.
+///
+void DwarfDebug::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 DwarfDebug::EmitDebugLoc() {
+ // Start the dwarf loc section.
+ Asm->SwitchToDataSection(TAI->getDwarfLocSection());
+ Asm->EOL();
+}
+
+/// EmitDebugARanges - Emit visible names into a debug aranges section.
+///
+void DwarfDebug::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::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 DwarfDebug::EmitDebugRanges() {
+ // Start the dwarf ranges section.
+ Asm->SwitchToDataSection(TAI->getDwarfRangesSection());
+ Asm->EOL();
+}
+
+/// EmitDebugMacInfo - Emit visible names into a debug macinfo section.
+///
+void DwarfDebug::EmitDebugMacInfo() {
+ if (TAI->doesSupportMacInfoSection()) {
+ // Start the dwarf macinfo section.
+ Asm->SwitchToDataSection(TAI->getDwarfMacInfoSection());
+ Asm->EOL();
+ }
+}
+
+/// EmitDebugInlineInfo - Emit inline info using following format.
+/// Section Header:
+/// 1. length of section
+/// 2. Dwarf version number
+/// 3. address size.
+///
+/// Entries (one "entry" for each function that was inlined):
+///
+/// 1. offset into __debug_str section for MIPS linkage name, if exists;
+/// otherwise offset into __debug_str for regular function name.
+/// 2. offset into __debug_str section for regular function name.
+/// 3. an unsigned LEB128 number indicating the number of distinct inlining
+/// instances for the function.
+///
+/// The rest of the entry consists of a {die_offset, low_pc} pair for each
+/// inlined instance; the die_offset points to the inlined_subroutine die in the
+/// __debug_info section, and the low_pc is the starting address for the
+/// inlining instance.
+void DwarfDebug::EmitDebugInlineInfo() {
+ if (!TAI->doesDwarfUsesInlineInfoSection())
+ return;
+
+ if (!MainCU)
+ return;
+
+ Asm->SwitchToDataSection(TAI->getDwarfDebugInlineSection());
+ Asm->EOL();
+ EmitDifference("debug_inlined_end", 1,
+ "debug_inlined_begin", 1, true);
+ Asm->EOL("Length of Debug Inlined Information Entry");
+
+ EmitLabel("debug_inlined_begin", 1);
+
+ Asm->EmitInt16(dwarf::DWARF_VERSION); Asm->EOL("Dwarf Version");
+ Asm->EmitInt8(TD->getPointerSize()); Asm->EOL("Address Size (in bytes)");
+
+ for (DenseMap<GlobalVariable *, SmallVector<unsigned, 4> >::iterator
+ I = InlineInfo.begin(), E = InlineInfo.end(); I != E; ++I) {
+ GlobalVariable *GV = I->first;
+ SmallVector<unsigned, 4> &Labels = I->second;
+ DISubprogram SP(GV);
+ std::string Name;
+ std::string LName;
+
+ SP.getLinkageName(LName);
+ SP.getName(Name);
+
+ Asm->EmitString(LName.empty() ? Name : LName);
+ Asm->EOL("MIPS linkage name");
+
+ Asm->EmitString(Name); Asm->EOL("Function name");
+
+ Asm->EmitULEB128Bytes(Labels.size()); Asm->EOL("Inline count");
+
+ for (SmallVector<unsigned, 4>::iterator LI = Labels.begin(),
+ LE = Labels.end(); LI != LE; ++LI) {
+ DIE *SP = MainCU->getDieMapSlotFor(GV);
+ Asm->EmitInt32(SP->getOffset()); Asm->EOL("DIE offset");
+
+ if (TD->getPointerSize() == sizeof(int32_t))
+ O << TAI->getData32bitsDirective();
+ else
+ O << TAI->getData64bitsDirective();
+
+ PrintLabelName("label", *LI); Asm->EOL("low_pc");
+ }
+ }
+
+ EmitLabel("debug_inlined_end", 1);
+ Asm->EOL();
+}
+
+/// GetOrCreateSourceID - Look up the source id with the given directory and
+/// source file names. If none currently exists, create a new id and insert it
+/// in the SourceIds map. This can update DirectoryNames and SourceFileNames
+/// maps as well.
+unsigned DwarfDebug::GetOrCreateSourceID(const std::string &DirName,
+ const std::string &FileName) {
+ unsigned DId;
+ StringMap<unsigned>::iterator DI = DirectoryIdMap.find(DirName);
+ if (DI != DirectoryIdMap.end()) {
+ DId = DI->getValue();
+ } else {
+ DId = DirectoryNames.size() + 1;
+ DirectoryIdMap[DirName] = DId;
+ DirectoryNames.push_back(DirName);
+ }
+
+ unsigned FId;
+ StringMap<unsigned>::iterator FI = SourceFileIdMap.find(FileName);
+ if (FI != SourceFileIdMap.end()) {
+ FId = FI->getValue();
+ } else {
+ FId = SourceFileNames.size() + 1;
+ SourceFileIdMap[FileName] = FId;
+ SourceFileNames.push_back(FileName);
+ }
+
+ DenseMap<std::pair<unsigned, unsigned>, unsigned>::iterator SI =
+ SourceIdMap.find(std::make_pair(DId, FId));
+ if (SI != SourceIdMap.end())
+ return SI->second;
+
+ unsigned SrcId = SourceIds.size() + 1; // DW_AT_decl_file cannot be 0.
+ SourceIdMap[std::make_pair(DId, FId)] = SrcId;
+ SourceIds.push_back(std::make_pair(DId, FId));
+
+ return SrcId;
+}
+
+void DwarfDebug::ConstructCompileUnit(GlobalVariable *GV) {
+ DICompileUnit DIUnit(GV);
+ std::string Dir, FN, Prod;
+ unsigned ID = GetOrCreateSourceID(DIUnit.getDirectory(Dir),
+ DIUnit.getFilename(FN));
+
+ DIE *Die = new DIE(dwarf::DW_TAG_compile_unit);
+ AddSectionOffset(Die, dwarf::DW_AT_stmt_list, dwarf::DW_FORM_data4,
+ DWLabel("section_line", 0), DWLabel("section_line", 0),
+ false);
+ AddString(Die, dwarf::DW_AT_producer, dwarf::DW_FORM_string,
+ DIUnit.getProducer(Prod));
+ AddUInt(Die, dwarf::DW_AT_language, dwarf::DW_FORM_data1,
+ DIUnit.getLanguage());
+ AddString(Die, dwarf::DW_AT_name, dwarf::DW_FORM_string, FN);
+
+ if (!Dir.empty())
+ AddString(Die, dwarf::DW_AT_comp_dir, dwarf::DW_FORM_string, Dir);
+ if (DIUnit.isOptimized())
+ AddUInt(Die, dwarf::DW_AT_APPLE_optimized, dwarf::DW_FORM_flag, 1);
+
+ std::string Flags;
+ DIUnit.getFlags(Flags);
+ if (!Flags.empty())
+ AddString(Die, dwarf::DW_AT_APPLE_flags, dwarf::DW_FORM_string, Flags);
+
+ unsigned RVer = DIUnit.getRunTimeVersion();
+ if (RVer)
+ AddUInt(Die, dwarf::DW_AT_APPLE_major_runtime_vers,
+ dwarf::DW_FORM_data1, RVer);
+
+ CompileUnit *Unit = new CompileUnit(ID, Die);
+ if (DIUnit.isMain()) {
+ assert(!MainCU && "Multiple main compile units are found!");
+ MainCU = Unit;
+ }
+
+ CompileUnitMap[DIUnit.getGV()] = Unit;
+ CompileUnits.push_back(Unit);
+}
+
+/// ConstructCompileUnits - Create a compile unit DIEs.
+void DwarfDebug::ConstructCompileUnits() {
+ GlobalVariable *Root = M->getGlobalVariable("llvm.dbg.compile_units");
+ if (!Root)
+ return;
+ assert(Root->hasLinkOnceLinkage() && Root->hasOneUse() &&
+ "Malformed compile unit descriptor anchor type");
+ Constant *RootC = cast<Constant>(*Root->use_begin());
+ assert(RootC->hasNUsesOrMore(1) &&
+ "Malformed compile unit descriptor anchor type");
+
+ for (Value::use_iterator UI = RootC->use_begin(), UE = Root->use_end();
+ UI != UE; ++UI)
+ for (Value::use_iterator UUI = UI->use_begin(), UUE = UI->use_end();
+ UUI != UUE; ++UUI) {
+ GlobalVariable *GV = cast<GlobalVariable>(*UUI);
+ ConstructCompileUnit(GV);
+ }
+}
+
+bool DwarfDebug::ConstructGlobalVariableDIE(GlobalVariable *GV) {
+ DIGlobalVariable DI_GV(GV);
+ CompileUnit *DW_Unit = MainCU;
+ if (!DW_Unit)
+ DW_Unit = &FindCompileUnit(DI_GV.getCompileUnit());
+
+ // Check for pre-existence.
+ DIE *&Slot = DW_Unit->getDieMapSlotFor(DI_GV.getGV());
+ if (Slot)
+ return false;
+
+ DIE *VariableDie = CreateGlobalVariableDIE(DW_Unit, DI_GV);
+
+ // Add address.
+ DIEBlock *Block = new DIEBlock();
+ AddUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_addr);
+ std::string GLN;
+ AddObjectLabel(Block, 0, dwarf::DW_FORM_udata,
+ Asm->getGlobalLinkName(DI_GV.getGlobal(), GLN));
+ AddBlock(VariableDie, dwarf::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.
+ std::string Name;
+ DW_Unit->AddGlobal(DI_GV.getName(Name), VariableDie);
+ return true;
+}
+
+/// ConstructGlobalVariableDIEs - Create DIEs for each of the externally visible
+/// global variables. Return true if at least one global DIE is created.
+bool DwarfDebug::ConstructGlobalVariableDIEs() {
+ GlobalVariable *Root = M->getGlobalVariable("llvm.dbg.global_variables");
+ if (!Root)
+ return false;
+
+ assert(Root->hasLinkOnceLinkage() && Root->hasOneUse() &&
+ "Malformed global variable descriptor anchor type");
+ Constant *RootC = cast<Constant>(*Root->use_begin());
+ assert(RootC->hasNUsesOrMore(1) &&
+ "Malformed global variable descriptor anchor type");
+
+ bool Result = false;
+ for (Value::use_iterator UI = RootC->use_begin(), UE = Root->use_end();
+ UI != UE; ++UI)
+ for (Value::use_iterator UUI = UI->use_begin(), UUE = UI->use_end();
+ UUI != UUE; ++UUI)
+ Result |= ConstructGlobalVariableDIE(cast<GlobalVariable>(*UUI));
+
+ return Result;
+}
+
+bool DwarfDebug::ConstructSubprogram(GlobalVariable *GV) {
+ DISubprogram SP(GV);
+ CompileUnit *Unit = MainCU;
+ if (!Unit)
+ Unit = &FindCompileUnit(SP.getCompileUnit());
+
+ // Check for pre-existence.
+ DIE *&Slot = Unit->getDieMapSlotFor(GV);
+ if (Slot)
+ return false;
+
+ if (!SP.isDefinition())
+ // This is a method declaration which will be handled while constructing
+ // class type.
+ return false;
+
+ DIE *SubprogramDie = CreateSubprogramDIE(Unit, SP);
+
+ // Add to map.
+ Slot = SubprogramDie;
+
+ // Add to context owner.
+ Unit->getDie()->AddChild(SubprogramDie);
+
+ // Expose as global.
+ std::string Name;
+ Unit->AddGlobal(SP.getName(Name), SubprogramDie);
+ return true;
+}
+
+/// ConstructSubprograms - Create DIEs for each of the externally visible
+/// subprograms. Return true if at least one subprogram DIE is created.
+bool DwarfDebug::ConstructSubprograms() {
+ GlobalVariable *Root = M->getGlobalVariable("llvm.dbg.subprograms");
+ if (!Root)
+ return false;
+
+ assert(Root->hasLinkOnceLinkage() && Root->hasOneUse() &&
+ "Malformed subprogram descriptor anchor type");
+ Constant *RootC = cast<Constant>(*Root->use_begin());
+ assert(RootC->hasNUsesOrMore(1) &&
+ "Malformed subprogram descriptor anchor type");
+
+ bool Result = false;
+ for (Value::use_iterator UI = RootC->use_begin(), UE = Root->use_end();
+ UI != UE; ++UI)
+ for (Value::use_iterator UUI = UI->use_begin(), UUE = UI->use_end();
+ UUI != UUE; ++UUI)
+ Result |= ConstructSubprogram(cast<GlobalVariable>(*UUI));
+
+ return Result;
+}
+
+/// SetDebugInfo - Create global DIEs and emit initial debug info sections.
+/// This is inovked by the target AsmPrinter.
+void DwarfDebug::SetDebugInfo(MachineModuleInfo *mmi) {
+ if (TimePassesIsEnabled)
+ DebugTimer->startTimer();
+
+ // Create all the compile unit DIEs.
+ ConstructCompileUnits();
+
+ if (CompileUnits.empty()) {
+ if (TimePassesIsEnabled)
+ DebugTimer->stopTimer();
+
+ return;
+ }
+
+ // Create DIEs for each of the externally visible global variables.
+ bool globalDIEs = ConstructGlobalVariableDIEs();
+
+ // Create DIEs for each of the externally visible subprograms.
+ bool subprogramDIEs = ConstructSubprograms();
+
+ // If there is not any debug info available for any global variables and any
+ // subprograms then there is not any debug info to emit.
+ if (!globalDIEs && !subprogramDIEs) {
+ if (TimePassesIsEnabled)
+ DebugTimer->stopTimer();
+
+ return;
+ }
+
+ MMI = mmi;
+ shouldEmit = true;
+ MMI->setDebugInfoAvailability(true);
+
+ // 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 = getNumSourceIds()+1; i != e; ++i) {
+ // Remember source id starts at 1.
+ std::pair<unsigned, unsigned> Id = getSourceDirectoryAndFileIds(i);
+ sys::Path FullPath(getSourceDirectoryName(Id.first));
+ bool AppendOk =
+ FullPath.appendComponent(getSourceFileName(Id.second));
+ assert(AppendOk && "Could not append filename to directory!");
+ AppendOk = false;
+ Asm->EmitFile(i, FullPath.toString());
+ Asm->EOL();
+ }
+ }
+
+ // Emit initial sections
+ EmitInitial();
+
+ if (TimePassesIsEnabled)
+ DebugTimer->stopTimer();
+}
+
+/// EndModule - Emit all Dwarf sections that should come after the content.
+///
+void DwarfDebug::EndModule() {
+ if (!ShouldEmitDwarfDebug())
+ return;
+
+ if (TimePassesIsEnabled)
+ DebugTimer->startTimer();
+
+ // 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();
+
+ // Emit inline info.
+ EmitDebugInlineInfo();
+
+ if (TimePassesIsEnabled)
+ DebugTimer->stopTimer();
+}
+
+/// BeginFunction - Gather pre-function debug information. Assumes being
+/// emitted immediately after the function entry point.
+void DwarfDebug::BeginFunction(MachineFunction *MF) {
+ this->MF = MF;
+
+ if (!ShouldEmitDwarfDebug()) return;
+
+ if (TimePassesIsEnabled)
+ DebugTimer->startTimer();
+
+ // 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.
+ DebugLoc FDL = MF->getDefaultDebugLoc();
+ if (!FDL.isUnknown()) {
+ DebugLocTuple DLT = MF->getDebugLocTuple(FDL);
+ unsigned LabelID = RecordSourceLine(DLT.Line, DLT.Col,
+ DICompileUnit(DLT.CompileUnit));
+ Asm->printLabel(LabelID);
+ }
+
+ if (TimePassesIsEnabled)
+ DebugTimer->stopTimer();
+}
+
+/// EndFunction - Gather and emit post-function debug information.
+///
+void DwarfDebug::EndFunction(MachineFunction *MF) {
+ if (!ShouldEmitDwarfDebug()) return;
+
+ if (TimePassesIsEnabled)
+ DebugTimer->startTimer();
+
+ // 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 the DbgScope for abstract instances.
+ for (SmallVector<DbgScope *, 32>::iterator
+ I = AbstractInstanceRootList.begin(),
+ E = AbstractInstanceRootList.end(); I != E; ++I)
+ ConstructAbstractDbgScope(*I);
+
+ // Construct scopes for subprogram.
+ if (FunctionDbgScope)
+ ConstructFunctionDbgScope(FunctionDbgScope);
+ 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 (FunctionDbgScope) {
+ delete FunctionDbgScope;
+ DbgScopeMap.clear();
+ DbgAbstractScopeMap.clear();
+ DbgConcreteScopeMap.clear();
+ InlinedVariableScopes.clear();
+ FunctionDbgScope = NULL;
+ LexicalScopeStack.clear();
+ AbstractInstanceRootList.clear();
+ }
+
+ Lines.clear();
+
+ if (TimePassesIsEnabled)
+ DebugTimer->stopTimer();
+}
+
+/// 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 DwarfDebug::RecordSourceLine(Value *V, unsigned Line, unsigned Col) {
+ if (TimePassesIsEnabled)
+ DebugTimer->startTimer();
+
+ CompileUnit *Unit = CompileUnitMap[V];
+ assert(Unit && "Unable to find CompileUnit");
+ unsigned ID = MMI->NextLabelID();
+ Lines.push_back(SrcLineInfo(Line, Col, Unit->getID(), ID));
+
+ if (TimePassesIsEnabled)
+ DebugTimer->stopTimer();
+
+ 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 DwarfDebug::RecordSourceLine(unsigned Line, unsigned Col,
+ DICompileUnit CU) {
+ if (TimePassesIsEnabled)
+ DebugTimer->startTimer();
+
+ std::string Dir, Fn;
+ unsigned Src = GetOrCreateSourceID(CU.getDirectory(Dir),
+ CU.getFilename(Fn));
+ unsigned ID = MMI->NextLabelID();
+ Lines.push_back(SrcLineInfo(Line, Col, Src, ID));
+
+ if (TimePassesIsEnabled)
+ DebugTimer->stopTimer();
+
+ return ID;
+}
+
+/// getOrCreateSourceID - Public version of GetOrCreateSourceID. This can be
+/// timed. Look up the source id with the given directory and source file
+/// names. If none currently exists, create a new id and insert it in the
+/// SourceIds map. This can update DirectoryNames and SourceFileNames maps as
+/// well.
+unsigned DwarfDebug::getOrCreateSourceID(const std::string &DirName,
+ const std::string &FileName) {
+ if (TimePassesIsEnabled)
+ DebugTimer->startTimer();
+
+ unsigned SrcId = GetOrCreateSourceID(DirName, FileName);
+
+ if (TimePassesIsEnabled)
+ DebugTimer->stopTimer();
+
+ return SrcId;
+}
+
+/// RecordRegionStart - Indicate the start of a region.
+unsigned DwarfDebug::RecordRegionStart(GlobalVariable *V) {
+ if (TimePassesIsEnabled)
+ DebugTimer->startTimer();
+
+ DbgScope *Scope = getOrCreateScope(V);
+ unsigned ID = MMI->NextLabelID();
+ if (!Scope->getStartLabelID()) Scope->setStartLabelID(ID);
+ LexicalScopeStack.push_back(Scope);
+
+ if (TimePassesIsEnabled)
+ DebugTimer->stopTimer();
+
+ return ID;
+}
+
+/// RecordRegionEnd - Indicate the end of a region.
+unsigned DwarfDebug::RecordRegionEnd(GlobalVariable *V) {
+ if (TimePassesIsEnabled)
+ DebugTimer->startTimer();
+
+ DbgScope *Scope = getOrCreateScope(V);
+ unsigned ID = MMI->NextLabelID();
+ Scope->setEndLabelID(ID);
+ if (LexicalScopeStack.size() != 0)
+ LexicalScopeStack.pop_back();
+
+ if (TimePassesIsEnabled)
+ DebugTimer->stopTimer();
+
+ return ID;
+}
+
+/// RecordVariable - Indicate the declaration of a local variable.
+void DwarfDebug::RecordVariable(GlobalVariable *GV, unsigned FrameIndex,
+ const MachineInstr *MI) {
+ if (TimePassesIsEnabled)
+ DebugTimer->startTimer();
+
+ DIDescriptor Desc(GV);
+ DbgScope *Scope = NULL;
+
+ if (Desc.getTag() == dwarf::DW_TAG_variable) {
+ // GV is a global variable.
+ DIGlobalVariable DG(GV);
+ Scope = getOrCreateScope(DG.getContext().getGV());
+ } else {
+ DenseMap<const MachineInstr *, DbgScope *>::iterator
+ SI = InlinedVariableScopes.find(MI);
+
+ if (SI != InlinedVariableScopes.end()) {
+ // or GV is an inlined local variable.
+ Scope = SI->second;
+ } else {
+ DIVariable DV(GV);
+ GlobalVariable *V = DV.getContext().getGV();
+
+ // FIXME: The code that checks for the inlined local variable is a hack!
+ DenseMap<const GlobalVariable *, DbgScope *>::iterator
+ AI = AbstractInstanceRootMap.find(V);
+
+ if (AI != AbstractInstanceRootMap.end())
+ // or GV is an inlined local variable.
+ Scope = AI->second;
+ else
+ // or GV is a local variable.
+ Scope = getOrCreateScope(V);
+ }
+ }
+
+ assert(Scope && "Unable to find the variable's scope");
+ DbgVariable *DV = new DbgVariable(DIVariable(GV), FrameIndex);
+ Scope->AddVariable(DV);
+
+ if (TimePassesIsEnabled)
+ DebugTimer->stopTimer();
+}
+
+//// RecordInlinedFnStart - Indicate the start of inlined subroutine.
+unsigned DwarfDebug::RecordInlinedFnStart(DISubprogram &SP, DICompileUnit CU,
+ unsigned Line, unsigned Col) {
+ unsigned LabelID = MMI->NextLabelID();
+
+ if (!TAI->doesDwarfUsesInlineInfoSection())
+ return LabelID;
+
+ if (TimePassesIsEnabled)
+ DebugTimer->startTimer();
+
+ GlobalVariable *GV = SP.getGV();
+ DenseMap<const GlobalVariable *, DbgScope *>::iterator
+ II = AbstractInstanceRootMap.find(GV);
+
+ if (II == AbstractInstanceRootMap.end()) {
+ // Create an abstract instance entry for this inlined function if it doesn't
+ // already exist.
+ DbgScope *Scope = new DbgScope(NULL, DIDescriptor(GV));
+
+ // Get the compile unit context.
+ CompileUnit *Unit = &FindCompileUnit(SP.getCompileUnit());
+ DIE *SPDie = Unit->getDieMapSlotFor(GV);
+ if (!SPDie)
+ SPDie = CreateSubprogramDIE(Unit, SP);
+
+ // Mark as being inlined. This makes this subprogram entry an abstract
+ // instance root.
+ // FIXME: Our debugger doesn't care about the value of DW_AT_inline, only
+ // that it's defined. It probably won't change in the future, but this
+ // could be more elegant.
+ AddUInt(SPDie, dwarf::DW_AT_inline, 0, dwarf::DW_INL_declared_not_inlined);
+
+ // Keep track of the abstract scope for this function.
+ DbgAbstractScopeMap[GV] = Scope;
+
+ AbstractInstanceRootMap[GV] = Scope;
+ AbstractInstanceRootList.push_back(Scope);
+ }
+
+ // Create a concrete inlined instance for this inlined function.
+ DbgConcreteScope *ConcreteScope = new DbgConcreteScope(DIDescriptor(GV));
+ DIE *ScopeDie = new DIE(dwarf::DW_TAG_inlined_subroutine);
+ CompileUnit *Unit = &FindCompileUnit(SP.getCompileUnit());
+ ScopeDie->setAbstractCompileUnit(Unit);
+
+ DIE *Origin = Unit->getDieMapSlotFor(GV);
+ AddDIEEntry(ScopeDie, dwarf::DW_AT_abstract_origin,
+ dwarf::DW_FORM_ref4, Origin);
+ AddUInt(ScopeDie, dwarf::DW_AT_call_file, 0, Unit->getID());
+ AddUInt(ScopeDie, dwarf::DW_AT_call_line, 0, Line);
+ AddUInt(ScopeDie, dwarf::DW_AT_call_column, 0, Col);
+
+ ConcreteScope->setDie(ScopeDie);
+ ConcreteScope->setStartLabelID(LabelID);
+ MMI->RecordUsedDbgLabel(LabelID);
+
+ LexicalScopeStack.back()->AddConcreteInst(ConcreteScope);
+
+ // Keep track of the concrete scope that's inlined into this function.
+ DenseMap<GlobalVariable *, SmallVector<DbgScope *, 8> >::iterator
+ SI = DbgConcreteScopeMap.find(GV);
+
+ if (SI == DbgConcreteScopeMap.end())
+ DbgConcreteScopeMap[GV].push_back(ConcreteScope);
+ else
+ SI->second.push_back(ConcreteScope);
+
+ // Track the start label for this inlined function.
+ DenseMap<GlobalVariable *, SmallVector<unsigned, 4> >::iterator
+ I = InlineInfo.find(GV);
+
+ if (I == InlineInfo.end())
+ InlineInfo[GV].push_back(LabelID);
+ else
+ I->second.push_back(LabelID);
+
+ if (TimePassesIsEnabled)
+ DebugTimer->stopTimer();
+
+ return LabelID;
+}
+
+/// RecordInlinedFnEnd - Indicate the end of inlined subroutine.
+unsigned DwarfDebug::RecordInlinedFnEnd(DISubprogram &SP) {
+ if (!TAI->doesDwarfUsesInlineInfoSection())
+ return 0;
+
+ if (TimePassesIsEnabled)
+ DebugTimer->startTimer();
+
+ GlobalVariable *GV = SP.getGV();
+ DenseMap<GlobalVariable *, SmallVector<DbgScope *, 8> >::iterator
+ I = DbgConcreteScopeMap.find(GV);
+
+ if (I == DbgConcreteScopeMap.end()) {
+ if (TimePassesIsEnabled)
+ DebugTimer->stopTimer();
+
+ return 0;
+ }
+
+ SmallVector<DbgScope *, 8> &Scopes = I->second;
+ assert(!Scopes.empty() && "We should have at least one debug scope!");
+ DbgScope *Scope = Scopes.back(); Scopes.pop_back();
+ unsigned ID = MMI->NextLabelID();
+ MMI->RecordUsedDbgLabel(ID);
+ Scope->setEndLabelID(ID);
+
+ if (TimePassesIsEnabled)
+ DebugTimer->stopTimer();
+
+ return ID;
+}
+
+/// RecordVariableScope - Record scope for the variable declared by
+/// DeclareMI. DeclareMI must describe TargetInstrInfo::DECLARE. Record scopes
+/// for only inlined subroutine variables. Other variables's scopes are
+/// determined during RecordVariable().
+void DwarfDebug::RecordVariableScope(DIVariable &DV,
+ const MachineInstr *DeclareMI) {
+ if (TimePassesIsEnabled)
+ DebugTimer->startTimer();
+
+ DISubprogram SP(DV.getContext().getGV());
+
+ if (SP.isNull()) {
+ if (TimePassesIsEnabled)
+ DebugTimer->stopTimer();
+
+ return;
+ }
+
+ DenseMap<GlobalVariable *, DbgScope *>::iterator
+ I = DbgAbstractScopeMap.find(SP.getGV());
+ if (I != DbgAbstractScopeMap.end())
+ InlinedVariableScopes[DeclareMI] = I->second;
+
+ if (TimePassesIsEnabled)
+ DebugTimer->stopTimer();
+}
Added: llvm/trunk/lib/CodeGen/AsmPrinter/DwarfDebug.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/AsmPrinter/DwarfDebug.h?rev=71854&view=auto
==============================================================================
--- llvm/trunk/lib/CodeGen/AsmPrinter/DwarfDebug.h (added)
+++ llvm/trunk/lib/CodeGen/AsmPrinter/DwarfDebug.h Fri May 15 04:23:25 2009
@@ -0,0 +1,565 @@
+//===-- llvm/CodeGen/DwarfDebug.h - Dwarf Debug Framework ------*- C++ -*--===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file contains support for writing dwarf debug info into asm files.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef CODEGEN_ASMPRINTER_DWARFDEBUG_H__
+#define CODEGEN_ASMPRINTER_DWARFDEBUG_H__
+
+#include "DIE.h"
+#include "DwarfPrinter.h"
+#include "llvm/CodeGen/AsmPrinter.h"
+#include "llvm/CodeGen/MachineLocation.h"
+#include "llvm/Analysis/DebugInfo.h"
+#include "llvm/Support/raw_ostream.h"
+#include "llvm/ADT/DenseMap.h"
+#include "llvm/ADT/FoldingSet.h"
+#include "llvm/ADT/StringMap.h"
+#include "llvm/ADT/UniqueVector.h"
+#include <string>
+
+namespace llvm {
+
+class CompileUnit;
+class DbgVariable;
+class DbgScope;
+class DbgConcreteScope;
+class MachineFrameInfo;
+class MachineModuleInfo;
+class TargetAsmInfo;
+class Timer;
+
+//===----------------------------------------------------------------------===//
+/// SrcLineInfo - This class is used to record source line correspondence.
+///
+class VISIBILITY_HIDDEN 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; }
+};
+
+class VISIBILITY_HIDDEN DwarfDebug : public Dwarf {
+ //===--------------------------------------------------------------------===//
+ // Attributes used to construct specific Dwarf sections.
+ //
+
+ /// CompileUnitMap - A map of global variables representing compile units to
+ /// compile units.
+ DenseMap<Value *, CompileUnit *> CompileUnitMap;
+
+ /// CompileUnits - All the compile units in this module.
+ ///
+ SmallVector<CompileUnit *, 8> CompileUnits;
+
+ /// MainCU - Some platform prefers one compile unit per .o file. In such
+ /// cases, all dies are inserted in MainCU.
+ CompileUnit *MainCU;
+
+ /// AbbreviationsSet - Used to uniquely define abbreviations.
+ ///
+ FoldingSet<DIEAbbrev> AbbreviationsSet;
+
+ /// Abbreviations - A list of all the unique abbreviations in use.
+ ///
+ std::vector<DIEAbbrev *> Abbreviations;
+
+ /// DirectoryIdMap - Directory name to directory id map.
+ ///
+ StringMap<unsigned> DirectoryIdMap;
+
+ /// DirectoryNames - A list of directory names.
+ SmallVector<std::string, 8> DirectoryNames;
+
+ /// SourceFileIdMap - Source file name to source file id map.
+ ///
+ StringMap<unsigned> SourceFileIdMap;
+
+ /// SourceFileNames - A list of source file names.
+ SmallVector<std::string, 8> SourceFileNames;
+
+ /// SourceIdMap - Source id map, i.e. pair of directory id and source file
+ /// id mapped to a unique id.
+ DenseMap<std::pair<unsigned, unsigned>, unsigned> SourceIdMap;
+
+ /// SourceIds - Reverse map from source id to directory id + file id pair.
+ ///
+ SmallVector<std::pair<unsigned, unsigned>, 8> SourceIds;
+
+ /// 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;
+
+ // FunctionDbgScope - Top level scope for the current function.
+ //
+ DbgScope *FunctionDbgScope;
+
+ /// DbgScopeMap - Tracks the scopes in the current function.
+ DenseMap<GlobalVariable *, DbgScope *> DbgScopeMap;
+
+ /// DbgAbstractScopeMap - Tracks abstract instance scopes in the current
+ /// function.
+ DenseMap<GlobalVariable *, DbgScope *> DbgAbstractScopeMap;
+
+ /// DbgConcreteScopeMap - Tracks concrete instance scopes in the current
+ /// function.
+ DenseMap<GlobalVariable *,
+ SmallVector<DbgScope *, 8> > DbgConcreteScopeMap;
+
+ /// InlineInfo - Keep track of inlined functions and their location. This
+ /// information is used to populate debug_inlined section.
+ DenseMap<GlobalVariable *, SmallVector<unsigned, 4> > InlineInfo;
+
+ /// InlinedVariableScopes - Scopes information for the inlined subroutine
+ /// variables.
+ DenseMap<const MachineInstr *, DbgScope *> InlinedVariableScopes;
+
+ /// AbstractInstanceRootMap - Map of abstract instance roots of inlined
+ /// functions. These are subroutine entries that contain a DW_AT_inline
+ /// attribute.
+ DenseMap<const GlobalVariable *, DbgScope *> AbstractInstanceRootMap;
+
+ /// AbstractInstanceRootList - List of abstract instance roots of inlined
+ /// functions. These are subroutine entries that contain a DW_AT_inline
+ /// attribute.
+ SmallVector<DbgScope *, 32> AbstractInstanceRootList;
+
+ /// LexicalScopeStack - A stack of lexical scopes. The top one is the current
+ /// scope.
+ SmallVector<DbgScope *, 16> LexicalScopeStack;
+
+ /// CompileUnitOffsets - A vector of the offsets of the compile units. This is
+ /// used when calculating the "origin" of a concrete instance of an inlined
+ /// function.
+ DenseMap<CompileUnit *, unsigned> CompileUnitOffsets;
+
+ /// DebugTimer - Timer for the Dwarf debug writer.
+ Timer *DebugTimer;
+
+ struct FunctionDebugFrameInfo {
+ unsigned Number;
+ std::vector<MachineMove> Moves;
+
+ FunctionDebugFrameInfo(unsigned Num, const std::vector<MachineMove> &M)
+ : Number(Num), Moves(M) {}
+ };
+
+ std::vector<FunctionDebugFrameInfo> DebugFrames;
+
+ /// getSourceDirectoryAndFileIds - Return the directory and file ids that
+ /// maps to the source id. Source id starts at 1.
+ std::pair<unsigned, unsigned>
+ getSourceDirectoryAndFileIds(unsigned SId) const {
+ return SourceIds[SId-1];
+ }
+
+ /// getNumSourceDirectories - Return the number of source directories in the
+ /// debug info.
+ unsigned getNumSourceDirectories() const {
+ return DirectoryNames.size();
+ }
+
+ /// getSourceDirectoryName - Return the name of the directory corresponding
+ /// to the id.
+ const std::string &getSourceDirectoryName(unsigned Id) const {
+ return DirectoryNames[Id - 1];
+ }
+
+ /// getSourceFileName - Return the name of the source file corresponding
+ /// to the id.
+ const std::string &getSourceFileName(unsigned Id) const {
+ return SourceFileNames[Id - 1];
+ }
+
+ /// getNumSourceIds - Return the number of unique source ids.
+ unsigned getNumSourceIds() const {
+ return SourceIds.size();
+ }
+
+ /// AssignAbbrevNumber - Define a unique number for the abbreviation.
+ ///
+ void AssignAbbrevNumber(DIEAbbrev &Abbrev);
+
+ /// 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);
+ }
+
+ /// NewDIEEntry - Creates a new DIEEntry to be a proxy for a debug information
+ /// entry.
+ DIEEntry *NewDIEEntry(DIE *Entry = NULL);
+
+ /// SetDIEEntry - Set a DIEEntry once the debug information entry is defined.
+ ///
+ void SetDIEEntry(DIEEntry *Value, DIE *Entry);
+
+ /// AddUInt - Add an unsigned integer attribute data and value.
+ ///
+ void AddUInt(DIE *Die, unsigned Attribute, unsigned Form, uint64_t Integer);
+
+ /// AddSInt - Add an signed integer attribute data and value.
+ ///
+ void AddSInt(DIE *Die, unsigned Attribute, unsigned Form, int64_t Integer);
+
+ /// AddString - Add a string attribute data and value.
+ ///
+ void AddString(DIE *Die, unsigned Attribute, unsigned Form,
+ const std::string &String);
+
+ /// AddLabel - Add a Dwarf label attribute data and value.
+ ///
+ void AddLabel(DIE *Die, unsigned Attribute, unsigned Form,
+ const DWLabel &Label);
+
+ /// AddObjectLabel - Add an non-Dwarf label attribute data and value.
+ ///
+ void AddObjectLabel(DIE *Die, unsigned Attribute, unsigned Form,
+ const std::string &Label);
+
+ /// 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);
+
+ /// AddDelta - Add a label delta attribute data and value.
+ ///
+ void AddDelta(DIE *Die, unsigned Attribute, unsigned Form,
+ const DWLabel &Hi, const DWLabel &Lo);
+
+ /// AddDIEEntry - Add a DIE attribute data and value.
+ ///
+ void AddDIEEntry(DIE *Die, unsigned Attribute, unsigned Form, DIE *Entry) {
+ Die->AddValue(Attribute, Form, NewDIEEntry(Entry));
+ }
+
+ /// AddBlock - Add block data.
+ ///
+ void AddBlock(DIE *Die, unsigned Attribute, unsigned Form, DIEBlock *Block);
+
+ /// AddSourceLine - Add location information to specified debug information
+ /// entry.
+ void AddSourceLine(DIE *Die, const DIVariable *V);
+
+ /// AddSourceLine - Add location information to specified debug information
+ /// entry.
+ void AddSourceLine(DIE *Die, const DIGlobal *G);
+
+ void AddSourceLine(DIE *Die, const DIType *Ty);
+
+ /// AddAddress - Add an address attribute to a die based on the location
+ /// provided.
+ void AddAddress(DIE *Die, unsigned Attribute,
+ const MachineLocation &Location);
+
+ /// AddType - Add a new type attribute to the specified entity.
+ void AddType(CompileUnit *DW_Unit, DIE *Entity, DIType Ty);
+
+ /// ConstructTypeDIE - Construct basic type die from DIBasicType.
+ void ConstructTypeDIE(CompileUnit *DW_Unit, DIE &Buffer,
+ DIBasicType BTy);
+
+ /// ConstructTypeDIE - Construct derived type die from DIDerivedType.
+ void ConstructTypeDIE(CompileUnit *DW_Unit, DIE &Buffer,
+ DIDerivedType DTy);
+
+ /// ConstructTypeDIE - Construct type DIE from DICompositeType.
+ void ConstructTypeDIE(CompileUnit *DW_Unit, DIE &Buffer,
+ DICompositeType CTy);
+
+ /// ConstructSubrangeDIE - Construct subrange DIE from DISubrange.
+ void ConstructSubrangeDIE(DIE &Buffer, DISubrange SR, DIE *IndexTy);
+
+ /// ConstructArrayTypeDIE - Construct array type DIE from DICompositeType.
+ void ConstructArrayTypeDIE(CompileUnit *DW_Unit, DIE &Buffer,
+ DICompositeType *CTy);
+
+ /// ConstructEnumTypeDIE - Construct enum type DIE from DIEnumerator.
+ DIE *ConstructEnumTypeDIE(CompileUnit *DW_Unit, DIEnumerator *ETy);
+
+ /// CreateGlobalVariableDIE - Create new DIE using GV.
+ DIE *CreateGlobalVariableDIE(CompileUnit *DW_Unit,
+ const DIGlobalVariable &GV);
+
+ /// CreateMemberDIE - Create new member DIE.
+ DIE *CreateMemberDIE(CompileUnit *DW_Unit, const DIDerivedType &DT);
+
+ /// CreateSubprogramDIE - Create new DIE using SP.
+ DIE *CreateSubprogramDIE(CompileUnit *DW_Unit,
+ const DISubprogram &SP,
+ bool IsConstructor = false);
+
+ /// FindCompileUnit - Get the compile unit for the given descriptor.
+ ///
+ CompileUnit &FindCompileUnit(DICompileUnit Unit) const;
+
+ /// NewDbgScopeVariable - Create a new scope variable.
+ ///
+ DIE *NewDbgScopeVariable(DbgVariable *DV, CompileUnit *Unit);
+
+ /// getOrCreateScope - Returns the scope associated with the given descriptor.
+ ///
+ DbgScope *getOrCreateScope(GlobalVariable *V);
+
+ /// ConstructDbgScope - Construct the components of a scope.
+ ///
+ void ConstructDbgScope(DbgScope *ParentScope,
+ unsigned ParentStartID, unsigned ParentEndID,
+ DIE *ParentDie, CompileUnit *Unit);
+
+ /// ConstructFunctionDbgScope - Construct the scope for the subprogram.
+ ///
+ void ConstructFunctionDbgScope(DbgScope *RootScope);
+
+ /// ConstructFunctionDbgScope - Construct the scope for the abstract debug
+ /// scope.
+ ///
+ void ConstructAbstractDbgScope(DbgScope *AbsScope);
+
+ /// ConstructDefaultDbgScope - Construct a default scope for the subprogram.
+ ///
+ void ConstructDefaultDbgScope(MachineFunction *MF);
+
+ /// EmitInitial - Emit initial Dwarf declarations. This is necessary for cc
+ /// tools to recognize the object file contains Dwarf information.
+ void EmitInitial();
+
+ /// EmitDIE - Recusively Emits a debug information entry.
+ ///
+ void EmitDIE(DIE *Die);
+
+ /// SizeAndOffsetDie - Compute the size and offset of a DIE.
+ ///
+ unsigned SizeAndOffsetDie(DIE *Die, unsigned Offset, bool Last);
+
+ /// SizeAndOffsets - Compute the size and offset of all the DIEs.
+ ///
+ void SizeAndOffsets();
+
+ /// EmitDebugInfo / EmitDebugInfoPerCU - Emit the debug info section.
+ ///
+ void EmitDebugInfoPerCU(CompileUnit *Unit);
+
+ void EmitDebugInfo();
+
+ /// EmitAbbreviations - Emit the abbreviation section.
+ ///
+ void EmitAbbreviations() const;
+
+ /// EmitEndOfLineMatrix - Emit the last address of the section and the end of
+ /// the line matrix.
+ ///
+ void EmitEndOfLineMatrix(unsigned SectionEnd);
+
+ /// EmitDebugLines - Emit source line information.
+ ///
+ void EmitDebugLines();
+
+ /// EmitCommonDebugFrame - Emit common frame info into a debug frame section.
+ ///
+ void EmitCommonDebugFrame();
+
+ /// EmitFunctionDebugFrame - Emit per function frame info into a debug frame
+ /// section.
+ void EmitFunctionDebugFrame(const FunctionDebugFrameInfo &DebugFrameInfo);
+
+ void EmitDebugPubNamesPerCU(CompileUnit *Unit);
+
+ /// EmitDebugPubNames - Emit visible names into a debug pubnames section.
+ ///
+ void EmitDebugPubNames();
+
+ /// EmitDebugStr - Emit visible names into a debug str section.
+ ///
+ void EmitDebugStr();
+
+ /// EmitDebugLoc - Emit visible names into a debug loc section.
+ ///
+ void EmitDebugLoc();
+
+ /// EmitDebugARanges - Emit visible names into a debug aranges section.
+ ///
+ void EmitDebugARanges();
+
+ /// EmitDebugRanges - Emit visible names into a debug ranges section.
+ ///
+ void EmitDebugRanges();
+
+ /// EmitDebugMacInfo - Emit visible names into a debug macinfo section.
+ ///
+ void EmitDebugMacInfo();
+
+ /// EmitDebugInlineInfo - Emit inline info using following format.
+ /// Section Header:
+ /// 1. length of section
+ /// 2. Dwarf version number
+ /// 3. address size.
+ ///
+ /// Entries (one "entry" for each function that was inlined):
+ ///
+ /// 1. offset into __debug_str section for MIPS linkage name, if exists;
+ /// otherwise offset into __debug_str for regular function name.
+ /// 2. offset into __debug_str section for regular function name.
+ /// 3. an unsigned LEB128 number indicating the number of distinct inlining
+ /// instances for the function.
+ ///
+ /// The rest of the entry consists of a {die_offset, low_pc} pair for each
+ /// inlined instance; the die_offset points to the inlined_subroutine die in
+ /// the __debug_info section, and the low_pc is the starting address for the
+ /// inlining instance.
+ void EmitDebugInlineInfo();
+
+ /// GetOrCreateSourceID - Look up the source id with the given directory and
+ /// source file names. If none currently exists, create a new id and insert it
+ /// in the SourceIds map. This can update DirectoryNames and SourceFileNames maps
+ /// as well.
+ unsigned GetOrCreateSourceID(const std::string &DirName,
+ const std::string &FileName);
+
+ void ConstructCompileUnit(GlobalVariable *GV);
+
+ /// ConstructCompileUnits - Create a compile unit DIEs.
+ void ConstructCompileUnits();
+
+ bool ConstructGlobalVariableDIE(GlobalVariable *GV);
+
+ /// ConstructGlobalVariableDIEs - Create DIEs for each of the externally
+ /// visible global variables. Return true if at least one global DIE is
+ /// created.
+ bool ConstructGlobalVariableDIEs();
+
+ bool ConstructSubprogram(GlobalVariable *GV);
+
+ /// ConstructSubprograms - Create DIEs for each of the externally visible
+ /// subprograms. Return true if at least one subprogram DIE is created.
+ bool ConstructSubprograms();
+public:
+ //===--------------------------------------------------------------------===//
+ // Main entry points.
+ //
+ DwarfDebug(raw_ostream &OS, AsmPrinter *A, const TargetAsmInfo *T);
+ virtual ~DwarfDebug();
+
+ /// ShouldEmitDwarfDebug - Returns true if Dwarf debugging declarations should
+ /// be emitted.
+ bool ShouldEmitDwarfDebug() const { return shouldEmit; }
+
+ /// SetDebugInfo - Create global DIEs and emit initial debug info sections.
+ /// This is inovked by the target AsmPrinter.
+ void SetDebugInfo(MachineModuleInfo *mmi);
+
+ /// 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();
+
+ /// BeginFunction - Gather pre-function debug information. Assumes being
+ /// emitted immediately after the function entry point.
+ void BeginFunction(MachineFunction *MF);
+
+ /// EndFunction - Gather and emit post-function debug information.
+ ///
+ void EndFunction(MachineFunction *MF);
+
+ /// 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);
+
+ /// 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, DICompileUnit CU);
+
+ /// getRecordSourceLineCount - Return the number of source lines in the debug
+ /// info.
+ unsigned getRecordSourceLineCount() const {
+ return Lines.size();
+ }
+
+ /// getOrCreateSourceID - Public version of GetOrCreateSourceID. This can be
+ /// timed. Look up the source id with the given directory and source file
+ /// names. If none currently exists, create a new id and insert it in the
+ /// SourceIds map. This can update DirectoryNames and SourceFileNames maps as
+ /// well.
+ unsigned getOrCreateSourceID(const std::string &DirName,
+ const std::string &FileName);
+
+ /// RecordRegionStart - Indicate the start of a region.
+ unsigned RecordRegionStart(GlobalVariable *V);
+
+ /// RecordRegionEnd - Indicate the end of a region.
+ unsigned RecordRegionEnd(GlobalVariable *V);
+
+ /// RecordVariable - Indicate the declaration of a local variable.
+ void RecordVariable(GlobalVariable *GV, unsigned FrameIndex,
+ const MachineInstr *MI);
+
+ //// RecordInlinedFnStart - Indicate the start of inlined subroutine.
+ unsigned RecordInlinedFnStart(DISubprogram &SP, DICompileUnit CU,
+ unsigned Line, unsigned Col);
+
+ /// RecordInlinedFnEnd - Indicate the end of inlined subroutine.
+ unsigned RecordInlinedFnEnd(DISubprogram &SP);
+
+ /// RecordVariableScope - Record scope for the variable declared by
+ /// DeclareMI. DeclareMI must describe TargetInstrInfo::DECLARE. Record scopes
+ /// for only inlined subroutine variables. Other variables's scopes are
+ /// determined during RecordVariable().
+ void RecordVariableScope(DIVariable &DV, const MachineInstr *DeclareMI);
+};
+
+} // End of namespace llvm
+
+#endif
Modified: llvm/trunk/lib/CodeGen/AsmPrinter/DwarfException.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/AsmPrinter/DwarfException.h?rev=71854&r1=71853&r2=71854&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/AsmPrinter/DwarfException.h (original)
+++ llvm/trunk/lib/CodeGen/AsmPrinter/DwarfException.h Fri May 15 04:23:25 2009
@@ -11,8 +11,8 @@
//
//===----------------------------------------------------------------------===//
-#ifndef DWARFEXCEPTION_H__
-#define DWARFEXCEPTION_H__
+#ifndef CODEGEN_ASMPRINTER_DWARFEXCEPTION_H__
+#define CODEGEN_ASMPRINTER_DWARFEXCEPTION_H__
#include "DIE.h"
#include "DwarfPrinter.h"
Modified: llvm/trunk/lib/CodeGen/AsmPrinter/DwarfLabel.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/AsmPrinter/DwarfLabel.h?rev=71854&r1=71853&r2=71854&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/AsmPrinter/DwarfLabel.h (original)
+++ llvm/trunk/lib/CodeGen/AsmPrinter/DwarfLabel.h Fri May 15 04:23:25 2009
@@ -11,8 +11,8 @@
//
//===----------------------------------------------------------------------===//
-#ifndef DWARFLABEL_H__
-#define DWARFLABEL_H__
+#ifndef CODEGEN_ASMPRINTER_DWARFLABEL_H__
+#define CODEGEN_ASMPRINTER_DWARFLABEL_H__
#include "llvm/Support/Compiler.h"
#include <iosfwd>
Modified: llvm/trunk/lib/CodeGen/AsmPrinter/DwarfPrinter.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/AsmPrinter/DwarfPrinter.h?rev=71854&r1=71853&r2=71854&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/AsmPrinter/DwarfPrinter.h (original)
+++ llvm/trunk/lib/CodeGen/AsmPrinter/DwarfPrinter.h Fri May 15 04:23:25 2009
@@ -11,8 +11,8 @@
//
//===----------------------------------------------------------------------===//
-#ifndef DWARFPRINTER_H__
-#define DWARFPRINTER_H__
+#ifndef CODEGEN_ASMPRINTER_DWARFPRINTER_H__
+#define CODEGEN_ASMPRINTER_DWARFPRINTER_H__
#include "DwarfLabel.h"
#include "llvm/CodeGen/MachineLocation.h"
Modified: llvm/trunk/lib/CodeGen/AsmPrinter/DwarfWriter.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/AsmPrinter/DwarfWriter.cpp?rev=71854&r1=71853&r2=71854&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/AsmPrinter/DwarfWriter.cpp (original)
+++ llvm/trunk/lib/CodeGen/AsmPrinter/DwarfWriter.cpp Fri May 15 04:23:25 2009
@@ -12,2810 +12,16 @@
//===----------------------------------------------------------------------===//
#include "llvm/CodeGen/DwarfWriter.h"
-#include "DIE.h"
+#include "DwarfDebug.h"
#include "DwarfException.h"
-#include "DwarfPrinter.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/Timer.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 "llvm/ADT/DenseMap.h"
-#include "llvm/ADT/FoldingSet.h"
-#include "llvm/ADT/StringExtras.h"
-#include "llvm/ADT/StringMap.h"
-#include <ostream>
-#include <string>
+
using namespace llvm;
-using namespace llvm::dwarf;
static RegisterPass<DwarfWriter>
X("dwarfwriter", "DWARF Information Writer");
char DwarfWriter::ID = 0;
-static TimerGroup &getDwarfTimerGroup() {
- static TimerGroup DwarfTimerGroup("Dwarf Exception and Debugging");
- return DwarfTimerGroup;
-}
-
-namespace llvm {
-
-//===----------------------------------------------------------------------===//
-
-/// Configuration values for initial hash set sizes (log2).
-///
-static const unsigned InitDiesSetSize = 9; // log2(512)
-static const unsigned InitAbbreviationsSetSize = 9; // log2(512)
-static const unsigned InitValuesSetSize = 9; // log2(512)
-
-//===----------------------------------------------------------------------===//
-/// CompileUnit - This dwarf writer support class manages information associate
-/// with a source file.
-class VISIBILITY_HIDDEN CompileUnit {
- /// 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;
-
- /// GVToDIEEntryMap - Tracks the mapping of unit level debug informaton
- /// descriptors to debug information entries using a DIEEntry proxy.
- std::map<GlobalVariable *, DIEEntry *> GVToDIEEntryMap;
-
- /// Globals - A map of globally visible named entities for this unit.
- ///
- StringMap<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(),
- GVToDIEEntryMap(), Globals(), DiesSet(InitDiesSetSize)
- {}
-
- ~CompileUnit() {
- delete Die;
- }
-
- // Accessors.
- unsigned getID() const { return ID; }
- DIE* getDie() const { return Die; }
- StringMap<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];
- }
-
- /// getDIEEntrySlotFor - Returns the debug information entry proxy slot for the
- /// specified debug variable.
- DIEEntry *&getDIEEntrySlotFor(GlobalVariable *GV) {
- return GVToDIEEntryMap[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;
- }
-};
-
-//===----------------------------------------------------------------------===//
-/// SrcLineInfo - This class is used to record source line correspondence.
-///
-class VISIBILITY_HIDDEN 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; }
-};
-
-//===----------------------------------------------------------------------===//
-/// DbgVariable - This class is used to track local variable information.
-///
-class VISIBILITY_HIDDEN DbgVariable {
- 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 DbgConcreteScope;
-class VISIBILITY_HIDDEN DbgScope {
- 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.
- SmallVector<DbgConcreteScope *, 8> ConcreteInsts;// Concrete insts of funcs.
-public:
- DbgScope(DbgScope *P, DIDescriptor D)
- : Parent(P), Desc(D), StartLabelID(0), EndLabelID(0) {}
- virtual ~DbgScope();
-
- // 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; }
- SmallVector<DbgConcreteScope*,8> &getConcreteInsts() { return ConcreteInsts; }
- 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); }
-
- /// AddConcreteInst - Add a concrete instance to the scope.
- ///
- void AddConcreteInst(DbgConcreteScope *C) { ConcreteInsts.push_back(C); }
-
-#ifndef NDEBUG
- void dump() const;
-#endif
-};
-
-#ifndef NDEBUG
-void DbgScope::dump() const {
- static unsigned IndentLevel = 0;
- std::string Indent(IndentLevel, ' ');
-
- cerr << Indent; Desc.dump();
- cerr << " [" << StartLabelID << ", " << EndLabelID << "]\n";
-
- IndentLevel += 2;
-
- for (unsigned i = 0, e = Scopes.size(); i != e; ++i)
- if (Scopes[i] != this)
- Scopes[i]->dump();
-
- IndentLevel -= 2;
-}
-#endif
-
-//===----------------------------------------------------------------------===//
-/// DbgConcreteScope - This class is used to track a scope that holds concrete
-/// instance information.
-///
-class VISIBILITY_HIDDEN DbgConcreteScope : public DbgScope {
- CompileUnit *Unit;
- DIE *Die; // Debug info for this concrete scope.
-public:
- DbgConcreteScope(DIDescriptor D) : DbgScope(NULL, D) {}
-
- // Accessors.
- DIE *getDie() const { return Die; }
- void setDie(DIE *D) { Die = D; }
-};
-
-DbgScope::~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];
- for (unsigned k = 0, O = ConcreteInsts.size(); k < O; ++k)
- delete ConcreteInsts[k];
-}
-
-//===----------------------------------------------------------------------===//
-/// DwarfDebug - Emits Dwarf debug directives.
-///
-class VISIBILITY_HIDDEN DwarfDebug : public Dwarf {
- //===--------------------------------------------------------------------===//
- // Attributes used to construct specific Dwarf sections.
- //
-
- /// CompileUnitMap - A map of global variables representing compile units to
- /// compile units.
- DenseMap<Value *, CompileUnit *> CompileUnitMap;
-
- /// CompileUnits - All the compile units in this module.
- ///
- SmallVector<CompileUnit *, 8> CompileUnits;
-
- /// MainCU - Some platform prefers one compile unit per .o file. In such
- /// cases, all dies are inserted in MainCU.
- CompileUnit *MainCU;
-
- /// AbbreviationsSet - Used to uniquely define abbreviations.
- ///
- FoldingSet<DIEAbbrev> AbbreviationsSet;
-
- /// Abbreviations - A list of all the unique abbreviations in use.
- ///
- std::vector<DIEAbbrev *> Abbreviations;
-
- /// DirectoryIdMap - Directory name to directory id map.
- ///
- StringMap<unsigned> DirectoryIdMap;
-
- /// DirectoryNames - A list of directory names.
- SmallVector<std::string, 8> DirectoryNames;
-
- /// SourceFileIdMap - Source file name to source file id map.
- ///
- StringMap<unsigned> SourceFileIdMap;
-
- /// SourceFileNames - A list of source file names.
- SmallVector<std::string, 8> SourceFileNames;
-
- /// SourceIdMap - Source id map, i.e. pair of directory id and source file
- /// id mapped to a unique id.
- DenseMap<std::pair<unsigned, unsigned>, unsigned> SourceIdMap;
-
- /// SourceIds - Reverse map from source id to directory id + file id pair.
- ///
- SmallVector<std::pair<unsigned, unsigned>, 8> SourceIds;
-
- /// 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;
-
- // FunctionDbgScope - Top level scope for the current function.
- //
- DbgScope *FunctionDbgScope;
-
- /// DbgScopeMap - Tracks the scopes in the current function.
- DenseMap<GlobalVariable *, DbgScope *> DbgScopeMap;
-
- /// DbgAbstractScopeMap - Tracks abstract instance scopes in the current
- /// function.
- DenseMap<GlobalVariable *, DbgScope *> DbgAbstractScopeMap;
-
- /// DbgConcreteScopeMap - Tracks concrete instance scopes in the current
- /// function.
- DenseMap<GlobalVariable *,
- SmallVector<DbgScope *, 8> > DbgConcreteScopeMap;
-
- /// InlineInfo - Keep track of inlined functions and their location. This
- /// information is used to populate debug_inlined section.
- DenseMap<GlobalVariable *, SmallVector<unsigned, 4> > InlineInfo;
-
- /// InlinedVariableScopes - Scopes information for the inlined subroutine
- /// variables.
- DenseMap<const MachineInstr *, DbgScope *> InlinedVariableScopes;
-
- /// AbstractInstanceRootMap - Map of abstract instance roots of inlined
- /// functions. These are subroutine entries that contain a DW_AT_inline
- /// attribute.
- DenseMap<const GlobalVariable *, DbgScope *> AbstractInstanceRootMap;
-
- /// AbstractInstanceRootList - List of abstract instance roots of inlined
- /// functions. These are subroutine entries that contain a DW_AT_inline
- /// attribute.
- SmallVector<DbgScope *, 32> AbstractInstanceRootList;
-
- /// LexicalScopeStack - A stack of lexical scopes. The top one is the current
- /// scope.
- SmallVector<DbgScope *, 16> LexicalScopeStack;
-
- /// CompileUnitOffsets - A vector of the offsets of the compile units. This is
- /// used when calculating the "origin" of a concrete instance of an inlined
- /// function.
- DenseMap<CompileUnit *, unsigned> CompileUnitOffsets;
-
- /// DebugTimer - Timer for the Dwarf debug writer.
- Timer *DebugTimer;
-
- struct FunctionDebugFrameInfo {
- unsigned Number;
- std::vector<MachineMove> Moves;
-
- FunctionDebugFrameInfo(unsigned Num, const std::vector<MachineMove> &M):
- Number(Num), Moves(M) { }
- };
-
- std::vector<FunctionDebugFrameInfo> DebugFrames;
-
-private:
- /// getSourceDirectoryAndFileIds - Return the directory and file ids that
- /// maps to the source id. Source id starts at 1.
- std::pair<unsigned, unsigned>
- getSourceDirectoryAndFileIds(unsigned SId) const {
- return SourceIds[SId-1];
- }
-
- /// getNumSourceDirectories - Return the number of source directories in the
- /// debug info.
- unsigned getNumSourceDirectories() const {
- return DirectoryNames.size();
- }
-
- /// getSourceDirectoryName - Return the name of the directory corresponding
- /// to the id.
- const std::string &getSourceDirectoryName(unsigned Id) const {
- return DirectoryNames[Id - 1];
- }
-
- /// getSourceFileName - Return the name of the source file corresponding
- /// to the id.
- const std::string &getSourceFileName(unsigned Id) const {
- return SourceFileNames[Id - 1];
- }
-
- /// getNumSourceIds - Return the number of unique source ids.
- unsigned getNumSourceIds() const {
- return SourceIds.size();
- }
-
- /// 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);
- }
-
- /// NewDIEEntry - Creates a new DIEEntry to be a proxy for a debug information
- /// entry.
- DIEEntry *NewDIEEntry(DIE *Entry = NULL) {
- DIEEntry *Value;
-
- if (Entry) {
- FoldingSetNodeID ID;
- DIEEntry::Profile(ID, Entry);
- void *Where;
- Value = static_cast<DIEEntry *>(ValuesSet.FindNodeOrInsertPos(ID, Where));
-
- if (Value) return Value;
-
- Value = new DIEEntry(Entry);
- ValuesSet.InsertNode(Value, Where);
- } else {
- Value = new DIEEntry(Entry);
- }
-
- Values.push_back(Value);
- return Value;
- }
-
- /// SetDIEEntry - Set a DIEEntry once the debug information entry is defined.
- ///
- void SetDIEEntry(DIEEntry *Value, DIE *Entry) {
- Value->setEntry(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 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);
- }
-
- /// AddDIEEntry - Add a DIE attribute data and value.
- ///
- void AddDIEEntry(DIE *Die, unsigned Attribute, unsigned Form, DIE *Entry) {
- Die->AddValue(Attribute, Form, NewDIEEntry(Entry));
- }
-
- /// AddBlock - Add block data.
- ///
- void AddBlock(DIE *Die, unsigned Attribute, unsigned Form, DIEBlock *Block) {
- Block->ComputeSize(TD);
- 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);
- }
-
- /// AddSourceLine - Add location information to specified debug information
- /// entry.
- void AddSourceLine(DIE *Die, const DIVariable *V) {
- // If there is no compile unit specified, don't add a line #.
- if (V->getCompileUnit().isNull())
- return;
-
- unsigned Line = V->getLineNumber();
- unsigned FileID = FindCompileUnit(V->getCompileUnit()).getID();
- assert(FileID && "Invalid file id");
- 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) {
- // If there is no compile unit specified, don't add a line #.
- if (G->getCompileUnit().isNull())
- return;
- unsigned Line = G->getLineNumber();
- unsigned FileID = FindCompileUnit(G->getCompileUnit()).getID();
- assert(FileID && "Invalid file id");
- AddUInt(Die, DW_AT_decl_file, 0, FileID);
- AddUInt(Die, DW_AT_decl_line, 0, Line);
- }
-
- void AddSourceLine(DIE *Die, const DIType *Ty) {
- // If there is no compile unit specified, don't add a line #.
- DICompileUnit CU = Ty->getCompileUnit();
- if (CU.isNull())
- return;
-
- unsigned Line = Ty->getLineNumber();
- unsigned FileID = FindCompileUnit(CU).getID();
- assert(FileID && "Invalid file id");
- 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);
- }
-
- /// AddType - Add a new type attribute to the specified entity.
- void AddType(CompileUnit *DW_Unit, DIE *Entity, DIType Ty) {
- if (Ty.isNull())
- return;
-
- // Check for pre-existence.
- DIEEntry *&Slot = DW_Unit->getDIEEntrySlotFor(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 = NewDIEEntry();
-
- // 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 appropriate context.
- DIE *Die = NULL;
- DIDescriptor Context = Ty.getContext();
- if (!Context.isNull())
- Die = DW_Unit->getDieMapSlotFor(Context.getGV());
-
- if (Die) {
- DIE *Child = new DIE(Buffer);
- Die->AddChild(Child);
- Buffer.Detach();
- SetDIEEntry(Slot, Child);
- } else {
- Die = DW_Unit->AddDie(Buffer);
- SetDIEEntry(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.
- std::string Name;
- BTy.getName(Name);
- 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.
- std::string Name;
- DTy.getName(Name);
- 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.
- if (!DTy.isForwardDecl())
- AddSourceLine(&Buffer, &DTy);
- }
-
- /// ConstructTypeDIE - Construct type DIE from DICompositeType.
- void ConstructTypeDIE(CompileUnit *DW_Unit, DIE &Buffer,
- DICompositeType CTy) {
- // Get core information.
- std::string Name;
- CTy.getName(Name);
-
- uint64_t Size = CTy.getSizeInBits() >> 3;
- unsigned Tag = CTy.getTag();
- Buffer.setTag(Tag);
-
- 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 return type.
- DIArray Elements = CTy.getTypeArray();
- DIDescriptor RTy = Elements.getElement(0);
- AddType(DW_Unit, &Buffer, DIType(RTy.getGV()));
-
- // Add prototype flag.
- AddUInt(&Buffer, DW_AT_prototyped, DW_FORM_flag, 1);
-
- // 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:
- case DW_TAG_class_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
- ElemDie = CreateMemberDIE(DW_Unit,
- DIDerivedType(Element.getGV()));
- Buffer.AddChild(ElemDie);
- }
-
- // FIXME: We'd like an API to register additional attributes for the
- // frontend to use while synthesizing, and then we'd use that api in
- // clang instead of this.
- if (Name == "__block_literal_generic")
- AddUInt(&Buffer, DW_AT_APPLE_block, DW_FORM_flag, 1);
-
- unsigned RLang = CTy.getRunTimeLang();
- if (RLang)
- AddUInt(&Buffer, DW_AT_APPLE_runtime_class, DW_FORM_data1, RLang);
- }
- break;
- default:
- break;
- }
-
- // Add name if not anonymous or intermediate type.
- if (!Name.empty())
- AddString(&Buffer, DW_AT_name, DW_FORM_string, Name);
-
- if (Tag == DW_TAG_enumeration_type || Tag == DW_TAG_structure_type
- || Tag == DW_TAG_union_type) {
- // 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 if it is not a forward declaration.
- if (CTy.isForwardDecl())
- AddUInt(&Buffer, DW_AT_declaration, DW_FORM_flag, 1);
- else
- AddUInt(&Buffer, DW_AT_byte_size, 0, 0);
- }
-
- // Add source line info if available.
- 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) {
- AddDIEEntry(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);
-
- // Emit derived type.
- AddType(DW_Unit, &Buffer, CTy->getTypeDerivedFrom());
- DIArray Elements = CTy->getTypeArray();
-
- // 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);
- std::string Name;
- ETy->getName(Name);
- AddString(Enumerator, DW_AT_name, DW_FORM_string, Name);
- 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);
- std::string Name;
- GV.getDisplayName(Name);
- AddString(GVDie, DW_AT_name, DW_FORM_string, Name);
- std::string LinkageName;
- GV.getLinkageName(LinkageName);
- 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;
- }
-
- /// CreateMemberDIE - Create new member DIE.
- DIE *CreateMemberDIE(CompileUnit *DW_Unit, const DIDerivedType &DT) {
- DIE *MemberDie = new DIE(DT.getTag());
- std::string Name;
- DT.getName(Name);
- if (!Name.empty())
- AddString(MemberDie, DW_AT_name, DW_FORM_string, Name);
-
- AddType(DW_Unit, MemberDie, DT.getTypeDerivedFrom());
-
- AddSourceLine(MemberDie, &DT);
-
- uint64_t Size = DT.getSizeInBits();
- uint64_t FieldSize = DT.getOriginalTypeSize();
-
- if (Size != FieldSize) {
- // Handle bitfield.
- AddUInt(MemberDie, DW_AT_byte_size, 0, DT.getOriginalTypeSize() >> 3);
- AddUInt(MemberDie, DW_AT_bit_size, 0, DT.getSizeInBits());
-
- uint64_t Offset = DT.getOffsetInBits();
- uint64_t FieldOffset = Offset;
- uint64_t AlignMask = ~(DT.getAlignInBits() - 1);
- uint64_t HiMark = (Offset + FieldSize) & AlignMask;
- FieldOffset = (HiMark - FieldSize);
- Offset -= FieldOffset;
- // Maybe we need to work from the other end.
- if (TD->isLittleEndian()) Offset = FieldSize - (Offset + Size);
- AddUInt(MemberDie, DW_AT_bit_offset, 0, Offset);
- }
- DIEBlock *Block = new DIEBlock();
- AddUInt(Block, 0, DW_FORM_data1, DW_OP_plus_uconst);
- AddUInt(Block, 0, DW_FORM_udata, DT.getOffsetInBits() >> 3);
- AddBlock(MemberDie, DW_AT_data_member_location, 0, Block);
-
- if (DT.isProtected())
- AddUInt(MemberDie, DW_AT_accessibility, 0, DW_ACCESS_protected);
- else if (DT.isPrivate())
- AddUInt(MemberDie, DW_AT_accessibility, 0, DW_ACCESS_private);
-
- return MemberDie;
- }
-
- /// CreateSubprogramDIE - Create new DIE using SP.
- DIE *CreateSubprogramDIE(CompileUnit *DW_Unit,
- const DISubprogram &SP,
- bool IsConstructor = false) {
- DIE *SPDie = new DIE(DW_TAG_subprogram);
-
- std::string Name;
- SP.getName(Name);
- AddString(SPDie, DW_AT_name, DW_FORM_string, Name);
-
- std::string LinkageName;
- SP.getLinkageName(LinkageName);
-
- 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 prototyped tag, if C or ObjC.
- unsigned Lang = SP.getCompileUnit().getLanguage();
- if (Lang == DW_LANG_C99 || Lang == DW_LANG_C89 || Lang == DW_LANG_ObjC)
- AddUInt(SPDie, DW_AT_prototyped, DW_FORM_flag, 1);
-
- // Add Return Type.
- unsigned SPTag = SPTy.getTag();
- if (!IsConstructor) {
- if (Args.isNull() || SPTag != DW_TAG_subroutine_type)
- AddType(DW_Unit, SPDie, SPTy);
- else
- AddType(DW_Unit, SPDie, DIType(Args.getElement(0).getGV()));
- }
-
- if (!SP.isDefinition()) {
- AddUInt(SPDie, DW_AT_declaration, DW_FORM_flag, 1);
- // Add arguments. Do not add arguments for subprogram definition. They
- // will be handled through RecordVariable.
- if (SPTag == DW_TAG_subroutine_type)
- 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);
-
- // DW_TAG_inlined_subroutine may refer to this DIE.
- DIE *&Slot = DW_Unit->getDieMapSlotFor(SP.getGV());
- Slot = SPDie;
- return SPDie;
- }
-
- /// FindCompileUnit - Get the compile unit for the given descriptor.
- ///
- CompileUnit &FindCompileUnit(DICompileUnit Unit) const {
- DenseMap<Value *, CompileUnit *>::const_iterator I =
- CompileUnitMap.find(Unit.getGV());
- assert(I != CompileUnitMap.end() && "Missing compile unit.");
- return *I->second;
- }
-
- /// 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);
- std::string Name;
- VD.getName(Name);
- AddString(VariableDie, DW_AT_name, DW_FORM_string, Name);
-
- // 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) return Slot;
-
- DbgScope *Parent = NULL;
- DIBlock Block(V);
-
- // Don't create a new scope if we already created one for an inlined
- // function.
- DenseMap<const GlobalVariable *, DbgScope *>::iterator
- II = AbstractInstanceRootMap.find(V);
- if (II != AbstractInstanceRootMap.end())
- return LexicalScopeStack.back();
-
- if (!Block.isNull()) {
- DIDescriptor ParentDesc = Block.getContext();
- Parent =
- ParentDesc.isNull() ? NULL : getOrCreateScope(ParentDesc.getGV());
- }
-
- Slot = new DbgScope(Parent, DIDescriptor(V));
-
- if (Parent)
- Parent->AddScope(Slot);
- else
- // First function is top level function.
- FunctionDbgScope = 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 concrete instances to scope.
- SmallVector<DbgConcreteScope *, 8> &ConcreteInsts = ParentScope->getConcreteInsts();
- for (unsigned i = 0, N = ConcreteInsts.size(); i < N; ++i) {
- DbgConcreteScope *ConcreteInst = ConcreteInsts[i];
- DIE *Die = ConcreteInst->getDie();
-
- unsigned StartID = ConcreteInst->getStartLabelID();
- unsigned EndID = ConcreteInst->getEndLabelID();
-
- // Add the scope bounds.
- if (StartID)
- AddLabel(Die, DW_AT_low_pc, DW_FORM_addr,
- DWLabel("label", StartID));
- else
- AddLabel(Die, DW_AT_low_pc, DW_FORM_addr,
- DWLabel("func_begin", SubprogramCount));
-
- if (EndID)
- AddLabel(Die, DW_AT_high_pc, DW_FORM_addr,
- DWLabel("label", EndID));
- else
- AddLabel(Die, DW_AT_high_pc, DW_FORM_addr,
- DWLabel("func_end", SubprogramCount));
-
- ParentDie->AddChild(Die);
- }
-
- // 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];
-
- unsigned StartID = MMI->MappedLabel(Scope->getStartLabelID());
- unsigned EndID = MMI->MappedLabel(Scope->getEndLabelID());
-
- // Ignore empty scopes.
- if (StartID == EndID && StartID != 0) continue;
-
- // Do not ignore inlined scopes even if they don't have any variables or
- // scopes.
- if (Scope->getScopes().empty() && Scope->getVariables().empty() &&
- Scope->getConcreteInsts().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's contents.
- ConstructDbgScope(Scope, StartID, EndID, ScopeDie, Unit);
- ParentDie->AddChild(ScopeDie);
- }
- }
- }
-
- /// ConstructFunctionDbgScope - Construct the scope for the subprogram.
- ///
- void ConstructFunctionDbgScope(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 = MainCU;
- if (!Unit)
- 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);
- }
-
- /// ConstructFunctionDbgScope - Construct the scope for the abstract debug
- /// scope.
- ///
- void ConstructAbstractDbgScope(DbgScope *AbsScope) {
- // Exit if there is no root scope.
- if (!AbsScope) return;
-
- DIDescriptor Desc = AbsScope->getDesc();
- if (Desc.isNull())
- return;
-
- // Get the subprogram debug information entry.
- DISubprogram SPD(Desc.getGV());
-
- // Get the compile unit context.
- CompileUnit *Unit = MainCU;
- if (!Unit)
- Unit = &FindCompileUnit(SPD.getCompileUnit());
-
- // Get the subprogram die.
- DIE *SPDie = Unit->getDieMapSlotFor(SPD.getGV());
- assert(SPDie && "Missing subprogram descriptor");
-
- ConstructDbgScope(AbsScope, 0, 0, SPDie, Unit);
- }
-
- /// ConstructDefaultDbgScope - Construct a default scope for the subprogram.
- ///
- void ConstructDefaultDbgScope(MachineFunction *MF) {
- const char *FnName = MF->getFunction()->getNameStart();
- if (MainCU) {
- StringMap<DIE*> &Globals = MainCU->getGlobals();
- StringMap<DIE*>::iterator GI = Globals.find(FnName);
- if (GI != Globals.end()) {
- DIE *SPDie = GI->second;
-
- // 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;
- }
- } else {
- for (unsigned i = 0, e = CompileUnits.size(); i != e; ++i) {
- CompileUnit *Unit = CompileUnits[i];
- StringMap<DIE*> &Globals = Unit->getGlobals();
- StringMap<DIE*>::iterator GI = Globals.find(FnName);
- if (GI != Globals.end()) {
- DIE *SPDie = GI->second;
-
- // 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);
- if (TAI->doesSupportMacInfoSection()) {
- 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 (Asm->isVerbose())
- 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;
- case DW_AT_abstract_origin: {
- DIEEntry *E = cast<DIEEntry>(Values[i]);
- DIE *Origin = E->getEntry();
- unsigned Addr =
- CompileUnitOffsets[Die->getAbstractCompileUnit()] +
- Origin->getOffset();
-
- Asm->EmitInt32(Addr);
- 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(TD, 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() {
- // Compute size of compile unit header.
- static 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)
-
- // Process base compile unit.
- if (MainCU) {
- SizeAndOffsetDie(MainCU->getDie(), Offset, true);
- CompileUnitOffsets[MainCU] = 0;
- return;
- }
-
- // Process all compile units.
- unsigned PrevOffset = 0;
-
- for (unsigned i = 0, e = CompileUnits.size(); i != e; ++i) {
- CompileUnit *Unit = CompileUnits[i];
- CompileUnitOffsets[Unit] = PrevOffset;
- PrevOffset += SizeAndOffsetDie(Unit->getDie(), Offset, true)
- + sizeof(int32_t); // FIXME - extra pad for gdb bug.
- }
- }
-
- /// EmitDebugInfo / EmitDebugInfoPerCU - Emit the debug info section.
- ///
- void EmitDebugInfoPerCU(CompileUnit *Unit) {
- 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();
- }
-
- void EmitDebugInfo() {
- // Start debug info section.
- Asm->SwitchToDataSection(TAI->getDwarfInfoSection());
-
- if (MainCU) {
- EmitDebugInfoPerCU(MainCU);
- return;
- }
-
- for (unsigned i = 0, e = CompileUnits.size(); i != e; ++i)
- EmitDebugInfoPerCU(CompileUnits[i]);
- }
-
- /// 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(Asm);
-
- 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 DI = 1, DE = getNumSourceDirectories()+1; DI != DE; ++DI) {
- Asm->EmitString(getSourceDirectoryName(DI));
- Asm->EOL("Directory");
- }
- Asm->EmitInt8(0); Asm->EOL("End of directories");
-
- // Emit files.
- for (unsigned SI = 1, SE = getNumSourceIds()+1; SI != SE; ++SI) {
- // Remember source id starts at 1.
- std::pair<unsigned, unsigned> Id = getSourceDirectoryAndFileIds(SI);
- Asm->EmitString(getSourceFileName(Id.second));
- Asm->EOL("Source");
- Asm->EmitULEB128Bytes(Id.first);
- 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 (Asm->isVerbose()) {
- const Section* S = SectionMap[j + 1];
- O << '\t' << TAI->getCommentString() << " Section"
- << S->getName() << '\n';
- } 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;
-
- if (!Asm->isVerbose())
- Asm->EOL();
- else {
- std::pair<unsigned, unsigned> SourceID =
- getSourceDirectoryAndFileIds(LineInfo.getSourceID());
- O << '\t' << TAI->getCommentString() << ' '
- << getSourceDirectoryName(SourceID.first) << ' '
- << getSourceFileName(SourceID.second)
- <<" :" << utostr_32(LineInfo.getLine()) << '\n';
- }
-
- // 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();
- }
-
- void EmitDebugPubNamesPerCU(CompileUnit *Unit) {
- 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");
-
- StringMap<DIE*> &Globals = Unit->getGlobals();
- for (StringMap<DIE*>::const_iterator
- GI = Globals.begin(), GE = Globals.end(); GI != GE; ++GI) {
- const char *Name = GI->getKeyData();
- DIE * Entity = GI->second;
-
- Asm->EmitInt32(Entity->getOffset()); Asm->EOL("DIE offset");
- Asm->EmitString(Name, strlen(Name)); Asm->EOL("External Name");
- }
-
- Asm->EmitInt32(0); Asm->EOL("End Mark");
- EmitLabel("pubnames_end", Unit->getID());
-
- Asm->EOL();
- }
-
- /// EmitDebugPubNames - Emit visible names into a debug pubnames section.
- ///
- void EmitDebugPubNames() {
- // Start the dwarf pubnames section.
- Asm->SwitchToDataSection(TAI->getDwarfPubNamesSection());
-
- if (MainCU) {
- EmitDebugPubNamesPerCU(MainCU);
- return;
- }
-
- for (unsigned i = 0, e = CompileUnits.size(); i != e; ++i)
- EmitDebugPubNamesPerCU(CompileUnits[i]);
- }
-
- /// 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() {
- if (TAI->doesSupportMacInfoSection()) {
- // Start the dwarf macinfo section.
- Asm->SwitchToDataSection(TAI->getDwarfMacInfoSection());
-
- Asm->EOL();
- }
- }
-
- /// EmitDebugInlineInfo - Emit inline info using following format.
- /// Section Header:
- /// 1. length of section
- /// 2. Dwarf version number
- /// 3. address size.
- ///
- /// Entries (one "entry" for each function that was inlined):
- ///
- /// 1. offset into __debug_str section for MIPS linkage name, if exists;
- /// otherwise offset into __debug_str for regular function name.
- /// 2. offset into __debug_str section for regular function name.
- /// 3. an unsigned LEB128 number indicating the number of distinct inlining
- /// instances for the function.
- ///
- /// The rest of the entry consists of a {die_offset, low_pc} pair for each
- /// inlined instance; the die_offset points to the inlined_subroutine die in
- /// the __debug_info section, and the low_pc is the starting address for the
- /// inlining instance.
- void EmitDebugInlineInfo() {
- if (!TAI->doesDwarfUsesInlineInfoSection())
- return;
-
- if (!MainCU)
- return;
-
- Asm->SwitchToDataSection(TAI->getDwarfDebugInlineSection());
- Asm->EOL();
- EmitDifference("debug_inlined_end", 1,
- "debug_inlined_begin", 1, true);
- Asm->EOL("Length of Debug Inlined Information Entry");
-
- EmitLabel("debug_inlined_begin", 1);
-
- Asm->EmitInt16(DWARF_VERSION); Asm->EOL("Dwarf Version");
- Asm->EmitInt8(TD->getPointerSize()); Asm->EOL("Address Size (in bytes)");
-
- for (DenseMap<GlobalVariable *, SmallVector<unsigned, 4> >::iterator
- I = InlineInfo.begin(), E = InlineInfo.end(); I != E; ++I) {
- GlobalVariable *GV = I->first;
- SmallVector<unsigned, 4> &Labels = I->second;
- DISubprogram SP(GV);
- std::string Name;
- std::string LName;
-
- SP.getLinkageName(LName);
- SP.getName(Name);
-
- Asm->EmitString(LName.empty() ? Name : LName);
- Asm->EOL("MIPS linkage name");
-
- Asm->EmitString(Name); Asm->EOL("Function name");
-
- Asm->EmitULEB128Bytes(Labels.size()); Asm->EOL("Inline count");
-
- for (SmallVector<unsigned, 4>::iterator LI = Labels.begin(),
- LE = Labels.end(); LI != LE; ++LI) {
- DIE *SP = MainCU->getDieMapSlotFor(GV);
- Asm->EmitInt32(SP->getOffset()); Asm->EOL("DIE offset");
-
- if (TD->getPointerSize() == sizeof(int32_t))
- O << TAI->getData32bitsDirective();
- else
- O << TAI->getData64bitsDirective();
- PrintLabelName("label", *LI); Asm->EOL("low_pc");
- }
- }
-
- EmitLabel("debug_inlined_end", 1);
- Asm->EOL();
- }
-
- /// GetOrCreateSourceID - Look up the source id with the given directory and
- /// source file names. If none currently exists, create a new id and insert it
- /// in the SourceIds map. This can update DirectoryNames and SourceFileNames maps
- /// as well.
- unsigned GetOrCreateSourceID(const std::string &DirName,
- const std::string &FileName) {
- unsigned DId;
- StringMap<unsigned>::iterator DI = DirectoryIdMap.find(DirName);
- if (DI != DirectoryIdMap.end()) {
- DId = DI->getValue();
- } else {
- DId = DirectoryNames.size() + 1;
- DirectoryIdMap[DirName] = DId;
- DirectoryNames.push_back(DirName);
- }
-
- unsigned FId;
- StringMap<unsigned>::iterator FI = SourceFileIdMap.find(FileName);
- if (FI != SourceFileIdMap.end()) {
- FId = FI->getValue();
- } else {
- FId = SourceFileNames.size() + 1;
- SourceFileIdMap[FileName] = FId;
- SourceFileNames.push_back(FileName);
- }
-
- DenseMap<std::pair<unsigned, unsigned>, unsigned>::iterator SI =
- SourceIdMap.find(std::make_pair(DId, FId));
- if (SI != SourceIdMap.end())
- return SI->second;
-
- unsigned SrcId = SourceIds.size() + 1; // DW_AT_decl_file cannot be 0.
- SourceIdMap[std::make_pair(DId, FId)] = SrcId;
- SourceIds.push_back(std::make_pair(DId, FId));
-
- return SrcId;
- }
-
- void ConstructCompileUnit(GlobalVariable *GV) {
- DICompileUnit DIUnit(GV);
- std::string Dir, FN, Prod;
- unsigned ID = GetOrCreateSourceID(DIUnit.getDirectory(Dir),
- DIUnit.getFilename(FN));
-
- 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(Prod));
- AddUInt(Die, DW_AT_language, DW_FORM_data1, DIUnit.getLanguage());
- AddString(Die, DW_AT_name, DW_FORM_string, FN);
- if (!Dir.empty())
- AddString(Die, DW_AT_comp_dir, DW_FORM_string, Dir);
- if (DIUnit.isOptimized())
- AddUInt(Die, DW_AT_APPLE_optimized, DW_FORM_flag, 1);
- std::string Flags;
- DIUnit.getFlags(Flags);
- if (!Flags.empty())
- AddString(Die, DW_AT_APPLE_flags, DW_FORM_string, Flags);
- unsigned RVer = DIUnit.getRunTimeVersion();
- if (RVer)
- AddUInt(Die, DW_AT_APPLE_major_runtime_vers, DW_FORM_data1, RVer);
-
- CompileUnit *Unit = new CompileUnit(ID, Die);
- if (DIUnit.isMain()) {
- assert(!MainCU && "Multiple main compile units are found!");
- MainCU = Unit;
- }
- CompileUnitMap[DIUnit.getGV()] = Unit;
- CompileUnits.push_back(Unit);
- }
-
- /// ConstructCompileUnits - Create a compile unit DIEs.
- void ConstructCompileUnits() {
- GlobalVariable *Root = M->getGlobalVariable("llvm.dbg.compile_units");
- if (!Root)
- return;
- assert(Root->hasLinkOnceLinkage() && Root->hasOneUse() &&
- "Malformed compile unit descriptor anchor type");
- Constant *RootC = cast<Constant>(*Root->use_begin());
- assert(RootC->hasNUsesOrMore(1) &&
- "Malformed compile unit descriptor anchor type");
- for (Value::use_iterator UI = RootC->use_begin(), UE = Root->use_end();
- UI != UE; ++UI)
- for (Value::use_iterator UUI = UI->use_begin(), UUE = UI->use_end();
- UUI != UUE; ++UUI) {
- GlobalVariable *GV = cast<GlobalVariable>(*UUI);
- ConstructCompileUnit(GV);
- }
- }
-
- bool ConstructGlobalVariableDIE(GlobalVariable *GV) {
- DIGlobalVariable DI_GV(GV);
- CompileUnit *DW_Unit = MainCU;
- if (!DW_Unit)
- DW_Unit = &FindCompileUnit(DI_GV.getCompileUnit());
-
- // Check for pre-existence.
- DIE *&Slot = DW_Unit->getDieMapSlotFor(DI_GV.getGV());
- if (Slot)
- return false;
-
- DIE *VariableDie = CreateGlobalVariableDIE(DW_Unit, DI_GV);
-
- // Add address.
- DIEBlock *Block = new DIEBlock();
- AddUInt(Block, 0, DW_FORM_data1, DW_OP_addr);
- std::string GLN;
- AddObjectLabel(Block, 0, DW_FORM_udata,
- Asm->getGlobalLinkName(DI_GV.getGlobal(), GLN));
- 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.
- std::string Name;
- DW_Unit->AddGlobal(DI_GV.getName(Name), VariableDie);
- return true;
- }
-
- /// ConstructGlobalVariableDIEs - Create DIEs for each of the externally
- /// visible global variables. Return true if at least one global DIE is
- /// created.
- bool ConstructGlobalVariableDIEs() {
- GlobalVariable *Root = M->getGlobalVariable("llvm.dbg.global_variables");
- if (!Root)
- return false;
-
- assert(Root->hasLinkOnceLinkage() && Root->hasOneUse() &&
- "Malformed global variable descriptor anchor type");
- Constant *RootC = cast<Constant>(*Root->use_begin());
- assert(RootC->hasNUsesOrMore(1) &&
- "Malformed global variable descriptor anchor type");
-
- bool Result = false;
- for (Value::use_iterator UI = RootC->use_begin(), UE = Root->use_end();
- UI != UE; ++UI)
- for (Value::use_iterator UUI = UI->use_begin(), UUE = UI->use_end();
- UUI != UUE; ++UUI)
- Result |= ConstructGlobalVariableDIE(cast<GlobalVariable>(*UUI));
-
- return Result;
- }
-
- bool ConstructSubprogram(GlobalVariable *GV) {
- DISubprogram SP(GV);
- CompileUnit *Unit = MainCU;
- if (!Unit)
- Unit = &FindCompileUnit(SP.getCompileUnit());
-
- // Check for pre-existence.
- DIE *&Slot = Unit->getDieMapSlotFor(GV);
- if (Slot)
- return false;
-
- if (!SP.isDefinition())
- // This is a method declaration which will be handled while
- // constructing class type.
- return false;
-
- DIE *SubprogramDie = CreateSubprogramDIE(Unit, SP);
-
- // Add to map.
- Slot = SubprogramDie;
- // Add to context owner.
- Unit->getDie()->AddChild(SubprogramDie);
- // Expose as global.
- std::string Name;
- Unit->AddGlobal(SP.getName(Name), SubprogramDie);
- return true;
- }
-
- /// ConstructSubprograms - Create DIEs for each of the externally visible
- /// subprograms. Return true if at least one subprogram DIE is created.
- bool ConstructSubprograms() {
- GlobalVariable *Root = M->getGlobalVariable("llvm.dbg.subprograms");
- if (!Root)
- return false;
-
- assert(Root->hasLinkOnceLinkage() && Root->hasOneUse() &&
- "Malformed subprogram descriptor anchor type");
- Constant *RootC = cast<Constant>(*Root->use_begin());
- assert(RootC->hasNUsesOrMore(1) &&
- "Malformed subprogram descriptor anchor type");
-
- bool Result = false;
- for (Value::use_iterator UI = RootC->use_begin(), UE = Root->use_end();
- UI != UE; ++UI)
- for (Value::use_iterator UUI = UI->use_begin(), UUE = UI->use_end();
- UUI != UUE; ++UUI)
- Result |= ConstructSubprogram(cast<GlobalVariable>(*UUI));
-
- return Result;
- }
-
-public:
- //===--------------------------------------------------------------------===//
- // Main entry points.
- //
- DwarfDebug(raw_ostream &OS, AsmPrinter *A, const TargetAsmInfo *T)
- : Dwarf(OS, A, T, "dbg"), MainCU(0),
- AbbreviationsSet(InitAbbreviationsSetSize), Abbreviations(),
- ValuesSet(InitValuesSetSize), Values(), StringPool(), SectionMap(),
- SectionSourceLines(), didInitial(false), shouldEmit(false),
- FunctionDbgScope(0), DebugTimer(0) {
- if (TimePassesIsEnabled)
- DebugTimer = new Timer("Dwarf Debug Writer",
- getDwarfTimerGroup());
- }
- virtual ~DwarfDebug() {
- for (unsigned j = 0, M = Values.size(); j < M; ++j)
- delete Values[j];
-
- for (DenseMap<const GlobalVariable *, DbgScope *>::iterator
- I = AbstractInstanceRootMap.begin(),
- E = AbstractInstanceRootMap.end(); I != E;++I)
- delete I->second;
-
- delete DebugTimer;
- }
-
- /// ShouldEmitDwarfDebug - Returns true if Dwarf debugging declarations should
- /// be emitted.
- bool ShouldEmitDwarfDebug() const { return shouldEmit; }
-
- /// SetDebugInfo - Create global DIEs and emit initial debug info sections.
- /// This is inovked by the target AsmPrinter.
- void SetDebugInfo(MachineModuleInfo *mmi) {
- if (TimePassesIsEnabled)
- DebugTimer->startTimer();
-
- // Create all the compile unit DIEs.
- ConstructCompileUnits();
-
- if (CompileUnits.empty()) {
- if (TimePassesIsEnabled)
- DebugTimer->stopTimer();
-
- return;
- }
-
- // Create DIEs for each of the externally visible global variables.
- bool globalDIEs = ConstructGlobalVariableDIEs();
-
- // Create DIEs for each of the externally visible subprograms.
- bool subprogramDIEs = ConstructSubprograms();
-
- // If there is not any debug info available for any global variables
- // and any subprograms then there is not any debug info to emit.
- if (!globalDIEs && !subprogramDIEs) {
- if (TimePassesIsEnabled)
- DebugTimer->stopTimer();
-
- return;
- }
-
- MMI = mmi;
- shouldEmit = true;
- MMI->setDebugInfoAvailability(true);
-
- // 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 = getNumSourceIds()+1; i != e; ++i) {
- // Remember source id starts at 1.
- std::pair<unsigned, unsigned> Id = getSourceDirectoryAndFileIds(i);
- sys::Path FullPath(getSourceDirectoryName(Id.first));
- bool AppendOk =
- FullPath.appendComponent(getSourceFileName(Id.second));
- assert(AppendOk && "Could not append filename to directory!");
- AppendOk = false;
- Asm->EmitFile(i, FullPath.toString());
- Asm->EOL();
- }
- }
-
- // Emit initial sections
- EmitInitial();
-
- if (TimePassesIsEnabled)
- DebugTimer->stopTimer();
- }
-
- /// 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 (!ShouldEmitDwarfDebug())
- return;
-
- if (TimePassesIsEnabled)
- DebugTimer->startTimer();
-
- // 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();
-
- // Emit inline info.
- EmitDebugInlineInfo();
-
- if (TimePassesIsEnabled)
- DebugTimer->stopTimer();
- }
-
- /// BeginFunction - Gather pre-function debug information. Assumes being
- /// emitted immediately after the function entry point.
- void BeginFunction(MachineFunction *MF) {
- this->MF = MF;
-
- if (!ShouldEmitDwarfDebug()) return;
-
- if (TimePassesIsEnabled)
- DebugTimer->startTimer();
-
- // 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.
- DebugLoc FDL = MF->getDefaultDebugLoc();
- if (!FDL.isUnknown()) {
- DebugLocTuple DLT = MF->getDebugLocTuple(FDL);
- unsigned LabelID = RecordSourceLine(DLT.Line, DLT.Col,
- DICompileUnit(DLT.CompileUnit));
- Asm->printLabel(LabelID);
- }
-
- if (TimePassesIsEnabled)
- DebugTimer->stopTimer();
- }
-
- /// EndFunction - Gather and emit post-function debug information.
- ///
- void EndFunction(MachineFunction *MF) {
- if (!ShouldEmitDwarfDebug()) return;
-
- if (TimePassesIsEnabled)
- DebugTimer->startTimer();
-
- // 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 the DbgScope for abstract instances.
- for (SmallVector<DbgScope *, 32>::iterator
- I = AbstractInstanceRootList.begin(),
- E = AbstractInstanceRootList.end(); I != E; ++I)
- ConstructAbstractDbgScope(*I);
-
- // Construct scopes for subprogram.
- if (FunctionDbgScope)
- ConstructFunctionDbgScope(FunctionDbgScope);
- 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 (FunctionDbgScope) {
- delete FunctionDbgScope;
- DbgScopeMap.clear();
- DbgAbstractScopeMap.clear();
- DbgConcreteScopeMap.clear();
- InlinedVariableScopes.clear();
- FunctionDbgScope = NULL;
- LexicalScopeStack.clear();
- AbstractInstanceRootList.clear();
- }
-
- Lines.clear();
-
- if (TimePassesIsEnabled)
- DebugTimer->stopTimer();
- }
-
- /// 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) {
- if (TimePassesIsEnabled)
- DebugTimer->startTimer();
-
- CompileUnit *Unit = CompileUnitMap[V];
- assert(Unit && "Unable to find CompileUnit");
- unsigned ID = MMI->NextLabelID();
- Lines.push_back(SrcLineInfo(Line, Col, Unit->getID(), ID));
-
- if (TimePassesIsEnabled)
- DebugTimer->stopTimer();
-
- 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, DICompileUnit CU) {
- if (TimePassesIsEnabled)
- DebugTimer->startTimer();
-
- std::string Dir, Fn;
- unsigned Src = GetOrCreateSourceID(CU.getDirectory(Dir),
- CU.getFilename(Fn));
- unsigned ID = MMI->NextLabelID();
- Lines.push_back(SrcLineInfo(Line, Col, Src, ID));
-
- if (TimePassesIsEnabled)
- DebugTimer->stopTimer();
-
- return ID;
- }
-
- /// getRecordSourceLineCount - Return the number of source lines in the debug
- /// info.
- unsigned getRecordSourceLineCount() const {
- return Lines.size();
- }
-
- /// getOrCreateSourceID - Public version of GetOrCreateSourceID. This can be
- /// timed. Look up the source id with the given directory and source file
- /// names. If none currently exists, create a new id and insert it in the
- /// SourceIds map. This can update DirectoryNames and SourceFileNames maps as
- /// well.
- unsigned getOrCreateSourceID(const std::string &DirName,
- const std::string &FileName) {
- if (TimePassesIsEnabled)
- DebugTimer->startTimer();
-
- unsigned SrcId = GetOrCreateSourceID(DirName, FileName);
-
- if (TimePassesIsEnabled)
- DebugTimer->stopTimer();
-
- return SrcId;
- }
-
- /// RecordRegionStart - Indicate the start of a region.
- unsigned RecordRegionStart(GlobalVariable *V) {
- if (TimePassesIsEnabled)
- DebugTimer->startTimer();
-
- DbgScope *Scope = getOrCreateScope(V);
- unsigned ID = MMI->NextLabelID();
- if (!Scope->getStartLabelID()) Scope->setStartLabelID(ID);
- LexicalScopeStack.push_back(Scope);
-
- if (TimePassesIsEnabled)
- DebugTimer->stopTimer();
-
- return ID;
- }
-
- /// RecordRegionEnd - Indicate the end of a region.
- unsigned RecordRegionEnd(GlobalVariable *V) {
- if (TimePassesIsEnabled)
- DebugTimer->startTimer();
-
- DbgScope *Scope = getOrCreateScope(V);
- unsigned ID = MMI->NextLabelID();
- Scope->setEndLabelID(ID);
- if (LexicalScopeStack.size() != 0)
- LexicalScopeStack.pop_back();
-
- if (TimePassesIsEnabled)
- DebugTimer->stopTimer();
-
- return ID;
- }
-
- /// RecordVariable - Indicate the declaration of a local variable.
- void RecordVariable(GlobalVariable *GV, unsigned FrameIndex,
- const MachineInstr *MI) {
- if (TimePassesIsEnabled)
- DebugTimer->startTimer();
-
- 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 {
- DenseMap<const MachineInstr *, DbgScope *>::iterator
- SI = InlinedVariableScopes.find(MI);
-
- if (SI != InlinedVariableScopes.end()) {
- // or GV is an inlined local variable.
- Scope = SI->second;
- } else {
- DIVariable DV(GV);
- GlobalVariable *V = DV.getContext().getGV();
-
- // FIXME: The code that checks for the inlined local variable is a hack!
- DenseMap<const GlobalVariable *, DbgScope *>::iterator
- AI = AbstractInstanceRootMap.find(V);
-
- if (AI != AbstractInstanceRootMap.end())
- // or GV is an inlined local variable.
- Scope = AI->second;
- else
- // or GV is a local variable.
- Scope = getOrCreateScope(V);
- }
- }
-
- assert(Scope && "Unable to find the variable's scope");
- DbgVariable *DV = new DbgVariable(DIVariable(GV), FrameIndex);
- Scope->AddVariable(DV);
-
- if (TimePassesIsEnabled)
- DebugTimer->stopTimer();
- }
-
- //// RecordInlinedFnStart - Indicate the start of inlined subroutine.
- unsigned RecordInlinedFnStart(DISubprogram &SP, DICompileUnit CU,
- unsigned Line, unsigned Col) {
- unsigned LabelID = MMI->NextLabelID();
-
- if (!TAI->doesDwarfUsesInlineInfoSection())
- return LabelID;
-
- if (TimePassesIsEnabled)
- DebugTimer->startTimer();
-
- GlobalVariable *GV = SP.getGV();
- DenseMap<const GlobalVariable *, DbgScope *>::iterator
- II = AbstractInstanceRootMap.find(GV);
-
- if (II == AbstractInstanceRootMap.end()) {
- // Create an abstract instance entry for this inlined function if it
- // doesn't already exist.
- DbgScope *Scope = new DbgScope(NULL, DIDescriptor(GV));
-
- // Get the compile unit context.
- CompileUnit *Unit = &FindCompileUnit(SP.getCompileUnit());
- DIE *SPDie = Unit->getDieMapSlotFor(GV);
- if (!SPDie)
- SPDie = CreateSubprogramDIE(Unit, SP);
-
- // Mark as being inlined. This makes this subprogram entry an abstract
- // instance root.
- // FIXME: Our debugger doesn't care about the value of DW_AT_inline, only
- // that it's defined. It probably won't change in the future, but this
- // could be more elegant.
- AddUInt(SPDie, DW_AT_inline, 0, DW_INL_declared_not_inlined);
-
- // Keep track of the abstract scope for this function.
- DbgAbstractScopeMap[GV] = Scope;
-
- AbstractInstanceRootMap[GV] = Scope;
- AbstractInstanceRootList.push_back(Scope);
- }
-
- // Create a concrete inlined instance for this inlined function.
- DbgConcreteScope *ConcreteScope = new DbgConcreteScope(DIDescriptor(GV));
- DIE *ScopeDie = new DIE(DW_TAG_inlined_subroutine);
- CompileUnit *Unit = &FindCompileUnit(SP.getCompileUnit());
- ScopeDie->setAbstractCompileUnit(Unit);
-
- DIE *Origin = Unit->getDieMapSlotFor(GV);
- AddDIEEntry(ScopeDie, DW_AT_abstract_origin, DW_FORM_ref4, Origin);
- AddUInt(ScopeDie, DW_AT_call_file, 0, Unit->getID());
- AddUInt(ScopeDie, DW_AT_call_line, 0, Line);
- AddUInt(ScopeDie, DW_AT_call_column, 0, Col);
-
- ConcreteScope->setDie(ScopeDie);
- ConcreteScope->setStartLabelID(LabelID);
- MMI->RecordUsedDbgLabel(LabelID);
-
- LexicalScopeStack.back()->AddConcreteInst(ConcreteScope);
-
- // Keep track of the concrete scope that's inlined into this function.
- DenseMap<GlobalVariable *, SmallVector<DbgScope *, 8> >::iterator
- SI = DbgConcreteScopeMap.find(GV);
-
- if (SI == DbgConcreteScopeMap.end())
- DbgConcreteScopeMap[GV].push_back(ConcreteScope);
- else
- SI->second.push_back(ConcreteScope);
-
- // Track the start label for this inlined function.
- DenseMap<GlobalVariable *, SmallVector<unsigned, 4> >::iterator
- I = InlineInfo.find(GV);
-
- if (I == InlineInfo.end())
- InlineInfo[GV].push_back(LabelID);
- else
- I->second.push_back(LabelID);
-
- if (TimePassesIsEnabled)
- DebugTimer->stopTimer();
-
- return LabelID;
- }
-
- /// RecordInlinedFnEnd - Indicate the end of inlined subroutine.
- unsigned RecordInlinedFnEnd(DISubprogram &SP) {
- if (!TAI->doesDwarfUsesInlineInfoSection())
- return 0;
-
- if (TimePassesIsEnabled)
- DebugTimer->startTimer();
-
- GlobalVariable *GV = SP.getGV();
- DenseMap<GlobalVariable *, SmallVector<DbgScope *, 8> >::iterator
- I = DbgConcreteScopeMap.find(GV);
-
- if (I == DbgConcreteScopeMap.end()) {
- if (TimePassesIsEnabled)
- DebugTimer->stopTimer();
-
- return 0;
- }
-
- SmallVector<DbgScope *, 8> &Scopes = I->second;
- assert(!Scopes.empty() && "We should have at least one debug scope!");
- DbgScope *Scope = Scopes.back(); Scopes.pop_back();
- unsigned ID = MMI->NextLabelID();
- MMI->RecordUsedDbgLabel(ID);
- Scope->setEndLabelID(ID);
-
- if (TimePassesIsEnabled)
- DebugTimer->stopTimer();
-
- return ID;
- }
-
- /// RecordVariableScope - Record scope for the variable declared by
- /// DeclareMI. DeclareMI must describe TargetInstrInfo::DECLARE. Record scopes
- /// for only inlined subroutine variables. Other variables's scopes are
- /// determined during RecordVariable().
- void RecordVariableScope(DIVariable &DV, const MachineInstr *DeclareMI) {
- if (TimePassesIsEnabled)
- DebugTimer->startTimer();
-
- DISubprogram SP(DV.getContext().getGV());
-
- if (SP.isNull()) {
- if (TimePassesIsEnabled)
- DebugTimer->stopTimer();
-
- return;
- }
-
- DenseMap<GlobalVariable *, DbgScope *>::iterator
- I = DbgAbstractScopeMap.find(SP.getGV());
- if (I != DbgAbstractScopeMap.end())
- InlinedVariableScopes[DeclareMI] = I->second;
-
- if (TimePassesIsEnabled)
- DebugTimer->stopTimer();
- }
-};
-
-} // End of namespace llvm
-
//===----------------------------------------------------------------------===//
/// DwarfWriter Implementation
///
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