//
// The LLVM Compiler Infrastructure
//
-// This file was developed by James M. Laskey and is distributed under the
-// University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
#include "llvm/CodeGen/DwarfWriter.h"
+#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/FoldingSet.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/UniqueVector.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineLocation.h"
+#include "llvm/Support/Debug.h"
#include "llvm/Support/Dwarf.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/DataTypes.h"
#include "llvm/Support/Mangler.h"
+#include "llvm/System/Path.h"
#include "llvm/Target/TargetAsmInfo.h"
-#include "llvm/Target/MRegisterInfo.h"
+#include "llvm/Target/TargetRegisterInfo.h"
#include "llvm/Target/TargetData.h"
-#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetFrameInfo.h"
+#include "llvm/Target/TargetInstrInfo.h"
+#include "llvm/Target/TargetMachine.h"
+#include "llvm/Target/TargetOptions.h"
#include <ostream>
#include <string>
using namespace llvm;
using namespace llvm::dwarf;
namespace llvm {
-
+
//===----------------------------------------------------------------------===//
/// Configuration values for initial hash set sizes (log2).
//===----------------------------------------------------------------------===//
/// DWLabel - Labels are used to track locations in the assembler file.
-/// Labels appear in the form <prefix>debug_<Tag><Number>, where the tag is a
-/// category of label (Ex. location) and number is a value unique in that
-/// category.
+/// Labels appear in the form @verbatim <prefix><Tag><Number> @endverbatim,
+/// where the tag is a category of label (Ex. location) and number is a value
+/// unique in that category.
class DWLabel {
public:
/// Tag - Label category tag. Should always be a staticly declared C string.
///
const char *Tag;
-
+
/// Number - Value to make label unique.
///
unsigned Number;
DWLabel(const char *T, unsigned N) : Tag(T), Number(N) {}
-
+
void Profile(FoldingSetNodeID &ID) const {
ID.AddString(std::string(Tag));
ID.AddInteger(Number);
}
-
+
#ifndef NDEBUG
void print(std::ostream *O) const {
if (O) print(*O);
}
void print(std::ostream &O) const {
- O << ".debug_" << Tag;
+ O << "." << Tag;
if (Number) O << Number;
}
#endif
/// Attribute - Dwarf attribute code.
///
unsigned Attribute;
-
+
/// Form - Dwarf form code.
- ///
- unsigned Form;
-
+ ///
+ unsigned Form;
+
public:
DIEAbbrevData(unsigned A, unsigned F)
: Attribute(A)
, Form(F)
{}
-
+
// Accessors.
unsigned getAttribute() const { return Attribute; }
unsigned getForm() const { return Form; }
/// Tag - Dwarf tag code.
///
unsigned Tag;
-
+
/// Unique number for node.
///
unsigned Number;
/// Data - Raw data bytes for abbreviation.
///
- std::vector<DIEAbbrevData> Data;
+ SmallVector<DIEAbbrevData, 8> Data;
public:
, Data()
{}
~DIEAbbrev() {}
-
+
// Accessors.
unsigned getTag() const { return Tag; }
unsigned getNumber() const { return Number; }
unsigned getChildrenFlag() const { return ChildrenFlag; }
- const std::vector<DIEAbbrevData> &getData() const { return Data; }
+ const SmallVector<DIEAbbrevData, 8> &getData() const { return Data; }
void setTag(unsigned T) { Tag = T; }
void setChildrenFlag(unsigned CF) { ChildrenFlag = CF; }
void setNumber(unsigned N) { Number = N; }
-
+
/// AddAttribute - Adds another set of attribute information to the
/// abbreviation.
void AddAttribute(unsigned Attribute, unsigned Form) {
Data.push_back(DIEAbbrevData(Attribute, Form));
}
-
+
/// AddFirstAttribute - Adds a set of attribute information to the front
/// of the abbreviation.
void AddFirstAttribute(unsigned Attribute, unsigned Form) {
Data.insert(Data.begin(), DIEAbbrevData(Attribute, Form));
}
-
+
/// Profile - Used to gather unique data for the abbreviation folding set.
///
void Profile(FoldingSetNodeID &ID) {
ID.AddInteger(Tag);
ID.AddInteger(ChildrenFlag);
-
+
// For each attribute description.
for (unsigned i = 0, N = Data.size(); i < N; ++i)
Data[i].Profile(ID);
}
-
+
/// Emit - Print the abbreviation using the specified Dwarf writer.
///
- void Emit(const DwarfDebug &DD) const;
-
+ void Emit(const DwarfDebug &DD) const;
+
#ifndef NDEBUG
void print(std::ostream *O) {
if (O) print(*O);
/// Abbrev - Buffer for constructing abbreviation.
///
DIEAbbrev Abbrev;
-
+
/// Offset - Offset in debug info section.
///
unsigned Offset;
-
+
/// Size - Size of instance + children.
///
unsigned Size;
-
+
/// Children DIEs.
///
std::vector<DIE *> Children;
-
+
/// Attributes values.
///
- std::vector<DIEValue *> Values;
-
+ SmallVector<DIEValue*, 32> Values;
+
public:
- DIE(unsigned Tag)
+ explicit DIE(unsigned Tag)
: Abbrev(Tag, DW_CHILDREN_no)
, Offset(0)
, Size(0)
, Values()
{}
virtual ~DIE();
-
+
// Accessors.
DIEAbbrev &getAbbrev() { return Abbrev; }
unsigned getAbbrevNumber() const {
unsigned getOffset() const { return Offset; }
unsigned getSize() const { return Size; }
const std::vector<DIE *> &getChildren() const { return Children; }
- const std::vector<DIEValue *> &getValues() const { return Values; }
+ SmallVector<DIEValue*, 32> &getValues() { return Values; }
void setTag(unsigned Tag) { Abbrev.setTag(Tag); }
void setOffset(unsigned O) { Offset = O; }
void setSize(unsigned S) { Size = S; }
-
+
/// AddValue - Add a value and attributes to a DIE.
///
void AddValue(unsigned Attribute, unsigned Form, DIEValue *Value) {
Abbrev.AddAttribute(Attribute, Form);
Values.push_back(Value);
}
-
+
/// SiblingOffset - Return the offset of the debug information entry's
/// sibling.
unsigned SiblingOffset() const { return Offset + Size; }
-
+
/// AddSiblingOffset - Add a sibling offset field to the front of the DIE.
///
void AddSiblingOffset();
Abbrev.setChildrenFlag(DW_CHILDREN_yes);
Children.push_back(Child);
}
-
+
/// Detach - Detaches objects connected to it after copying.
///
void Detach() {
Children.clear();
}
-
+
/// Profile - Used to gather unique data for the value folding set.
///
void Profile(FoldingSetNodeID &ID) ;
-
+
#ifndef NDEBUG
void print(std::ostream *O, unsigned IncIndent = 0) {
if (O) print(*O, IncIndent);
isString,
isLabel,
isAsIsLabel,
+ isSectionOffset,
isDelta,
isEntry,
isBlock
};
-
+
/// Type - Type of data stored in the value.
///
unsigned Type;
-
- DIEValue(unsigned T)
+
+ explicit DIEValue(unsigned T)
: Type(T)
{}
virtual ~DIEValue() {}
-
+
// Accessors
unsigned getType() const { return Type; }
-
+
// Implement isa/cast/dyncast.
static bool classof(const DIEValue *) { return true; }
-
+
/// EmitValue - Emit value via the Dwarf writer.
///
- virtual void EmitValue(const DwarfDebug &DD, unsigned Form) const = 0;
-
+ virtual void EmitValue(DwarfDebug &DD, unsigned Form) = 0;
+
/// SizeOf - Return the size of a value in bytes.
///
virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const = 0;
-
+
/// Profile - Used to gather unique data for the value folding set.
///
virtual void Profile(FoldingSetNodeID &ID) = 0;
-
+
#ifndef NDEBUG
void print(std::ostream *O) {
if (O) print(*O);
//===----------------------------------------------------------------------===//
/// DWInteger - An integer value DIE.
-///
+///
class DIEInteger : public DIEValue {
private:
uint64_t Integer;
-
+
public:
- DIEInteger(uint64_t I) : DIEValue(isInteger), Integer(I) {}
+ explicit DIEInteger(uint64_t I) : DIEValue(isInteger), Integer(I) {}
// Implement isa/cast/dyncast.
static bool classof(const DIEInteger *) { return true; }
static bool classof(const DIEValue *I) { return I->Type == isInteger; }
-
+
/// BestForm - Choose the best form for integer.
///
static unsigned BestForm(bool IsSigned, uint64_t Integer) {
}
return DW_FORM_data8;
}
-
+
/// EmitValue - Emit integer of appropriate size.
///
- virtual void EmitValue(const DwarfDebug &DD, unsigned Form) const;
-
+ virtual void EmitValue(DwarfDebug &DD, unsigned Form);
+
/// SizeOf - Determine size of integer value in bytes.
///
virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const;
-
+
/// Profile - Used to gather unique data for the value folding set.
///
static void Profile(FoldingSetNodeID &ID, unsigned Integer) {
ID.AddInteger(Integer);
}
virtual void Profile(FoldingSetNodeID &ID) { Profile(ID, Integer); }
-
+
#ifndef NDEBUG
virtual void print(std::ostream &O) {
O << "Int: " << (int64_t)Integer
//===----------------------------------------------------------------------===//
/// DIEString - A string value DIE.
-///
+///
class DIEString : public DIEValue {
public:
const std::string String;
-
- DIEString(const std::string &S) : DIEValue(isString), String(S) {}
+
+ explicit DIEString(const std::string &S) : DIEValue(isString), String(S) {}
// Implement isa/cast/dyncast.
static bool classof(const DIEString *) { return true; }
static bool classof(const DIEValue *S) { return S->Type == isString; }
-
+
/// EmitValue - Emit string value.
///
- virtual void EmitValue(const DwarfDebug &DD, unsigned Form) const;
-
+ virtual void EmitValue(DwarfDebug &DD, unsigned Form);
+
/// SizeOf - Determine size of string value in bytes.
///
virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const {
return String.size() + sizeof(char); // sizeof('\0');
}
-
+
/// Profile - Used to gather unique data for the value folding set.
///
static void Profile(FoldingSetNodeID &ID, const std::string &String) {
ID.AddString(String);
}
virtual void Profile(FoldingSetNodeID &ID) { Profile(ID, String); }
-
+
#ifndef NDEBUG
virtual void print(std::ostream &O) {
O << "Str: \"" << String << "\"";
public:
const DWLabel Label;
-
- DIEDwarfLabel(const DWLabel &L) : DIEValue(isLabel), Label(L) {}
+
+ explicit DIEDwarfLabel(const DWLabel &L) : DIEValue(isLabel), Label(L) {}
// Implement isa/cast/dyncast.
static bool classof(const DIEDwarfLabel *) { return true; }
static bool classof(const DIEValue *L) { return L->Type == isLabel; }
-
+
/// EmitValue - Emit label value.
///
- virtual void EmitValue(const DwarfDebug &DD, unsigned Form) const;
-
+ virtual void EmitValue(DwarfDebug &DD, unsigned Form);
+
/// SizeOf - Determine size of label value in bytes.
///
virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const;
-
+
/// Profile - Used to gather unique data for the value folding set.
///
static void Profile(FoldingSetNodeID &ID, const DWLabel &Label) {
Label.Profile(ID);
}
virtual void Profile(FoldingSetNodeID &ID) { Profile(ID, Label); }
-
+
#ifndef NDEBUG
virtual void print(std::ostream &O) {
O << "Lbl: ";
class DIEObjectLabel : public DIEValue {
public:
const std::string Label;
-
- DIEObjectLabel(const std::string &L) : DIEValue(isAsIsLabel), Label(L) {}
+
+ explicit DIEObjectLabel(const std::string &L)
+ : DIEValue(isAsIsLabel), Label(L) {}
// Implement isa/cast/dyncast.
static bool classof(const DIEObjectLabel *) { return true; }
static bool classof(const DIEValue *L) { return L->Type == isAsIsLabel; }
-
+
/// EmitValue - Emit label value.
///
- virtual void EmitValue(const DwarfDebug &DD, unsigned Form) const;
-
+ virtual void EmitValue(DwarfDebug &DD, unsigned Form);
+
/// SizeOf - Determine size of label value in bytes.
///
virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const;
-
+
/// Profile - Used to gather unique data for the value folding set.
///
static void Profile(FoldingSetNodeID &ID, const std::string &Label) {
#endif
};
+//===----------------------------------------------------------------------===//
+/// DIESectionOffset - A section offset DIE.
+//
+class DIESectionOffset : public DIEValue {
+public:
+ const DWLabel Label;
+ const DWLabel Section;
+ bool IsEH : 1;
+ bool UseSet : 1;
+
+ DIESectionOffset(const DWLabel &Lab, const DWLabel &Sec,
+ bool isEH = false, bool useSet = true)
+ : DIEValue(isSectionOffset), Label(Lab), Section(Sec),
+ IsEH(isEH), UseSet(useSet) {}
+
+ // Implement isa/cast/dyncast.
+ static bool classof(const DIESectionOffset *) { return true; }
+ static bool classof(const DIEValue *D) { return D->Type == isSectionOffset; }
+
+ /// EmitValue - Emit section offset.
+ ///
+ virtual void EmitValue(DwarfDebug &DD, unsigned Form);
+
+ /// SizeOf - Determine size of section offset value in bytes.
+ ///
+ virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const;
+
+ /// Profile - Used to gather unique data for the value folding set.
+ ///
+ static void Profile(FoldingSetNodeID &ID, const DWLabel &Label,
+ const DWLabel &Section) {
+ ID.AddInteger(isSectionOffset);
+ Label.Profile(ID);
+ Section.Profile(ID);
+ // IsEH and UseSet are specific to the Label/Section that we will emit
+ // the offset for; so Label/Section are enough for uniqueness.
+ }
+ virtual void Profile(FoldingSetNodeID &ID) { Profile(ID, Label, Section); }
+
+#ifndef NDEBUG
+ virtual void print(std::ostream &O) {
+ O << "Off: ";
+ Label.print(O);
+ O << "-";
+ Section.print(O);
+ O << "-" << IsEH << "-" << UseSet;
+ }
+#endif
+};
+
//===----------------------------------------------------------------------===//
/// DIEDelta - A simple label difference DIE.
-///
+///
class DIEDelta : public DIEValue {
public:
const DWLabel LabelHi;
const DWLabel LabelLo;
-
+
DIEDelta(const DWLabel &Hi, const DWLabel &Lo)
: DIEValue(isDelta), LabelHi(Hi), LabelLo(Lo) {}
// Implement isa/cast/dyncast.
static bool classof(const DIEDelta *) { return true; }
static bool classof(const DIEValue *D) { return D->Type == isDelta; }
-
+
/// EmitValue - Emit delta value.
///
- virtual void EmitValue(const DwarfDebug &DD, unsigned Form) const;
-
+ virtual void EmitValue(DwarfDebug &DD, unsigned Form);
+
/// SizeOf - Determine size of delta value in bytes.
///
virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const;
-
+
/// Profile - Used to gather unique data for the value folding set.
///
static void Profile(FoldingSetNodeID &ID, const DWLabel &LabelHi,
class DIEntry : public DIEValue {
public:
DIE *Entry;
-
- DIEntry(DIE *E) : DIEValue(isEntry), Entry(E) {}
-
+
+ explicit DIEntry(DIE *E) : DIEValue(isEntry), Entry(E) {}
+
// Implement isa/cast/dyncast.
static bool classof(const DIEntry *) { return true; }
static bool classof(const DIEValue *E) { return E->Type == isEntry; }
-
+
/// EmitValue - Emit debug information entry offset.
///
- virtual void EmitValue(const DwarfDebug &DD, unsigned Form) const;
-
+ virtual void EmitValue(DwarfDebug &DD, unsigned Form);
+
/// SizeOf - Determine size of debug information entry in bytes.
///
virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const {
return sizeof(int32_t);
}
-
+
/// Profile - Used to gather unique data for the value folding set.
///
static void Profile(FoldingSetNodeID &ID, DIE *Entry) {
}
virtual void Profile(FoldingSetNodeID &ID) {
ID.AddInteger(isEntry);
-
+
if (Entry) {
ID.AddPointer(Entry);
} else {
ID.AddPointer(this);
}
}
-
+
#ifndef NDEBUG
virtual void print(std::ostream &O) {
O << "Die: 0x" << std::hex << (intptr_t)Entry << std::dec;
class DIEBlock : public DIEValue, public DIE {
public:
unsigned Size; // Size in bytes excluding size header.
-
+
DIEBlock()
: DIEValue(isBlock)
, DIE(0)
{}
~DIEBlock() {
}
-
+
// Implement isa/cast/dyncast.
static bool classof(const DIEBlock *) { return true; }
static bool classof(const DIEValue *E) { return E->Type == isBlock; }
-
+
/// ComputeSize - calculate the size of the block.
///
unsigned ComputeSize(DwarfDebug &DD);
-
+
/// BestForm - Choose the best form for data.
///
unsigned BestForm() const {
/// EmitValue - Emit block data.
///
- virtual void EmitValue(const DwarfDebug &DD, unsigned Form) const;
-
+ virtual void EmitValue(DwarfDebug &DD, unsigned Form);
+
/// SizeOf - Determine size of block data in bytes.
///
virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const;
-
+
/// Profile - Used to gather unique data for the value folding set.
///
ID.AddInteger(isBlock);
DIE::Profile(ID);
}
-
+
#ifndef NDEBUG
virtual void print(std::ostream &O) {
O << "Blk: ";
/// Desc - Compile unit debug descriptor.
///
CompileUnitDesc *Desc;
-
+
/// ID - File identifier for source.
///
unsigned ID;
-
+
/// Die - Compile unit debug information entry.
///
DIE *Die;
-
+
/// DescToDieMap - Tracks the mapping of unit level debug informaton
/// descriptors to debug information entries.
std::map<DebugInfoDesc *, DIE *> DescToDieMap;
/// DiesSet - Used to uniquely define dies within the compile unit.
///
FoldingSet<DIE> DiesSet;
-
+
/// Dies - List of all dies in the compile unit.
///
std::vector<DIE *> Dies;
-
+
public:
CompileUnit(CompileUnitDesc *CUD, unsigned I, DIE *D)
: Desc(CUD)
, DiesSet(InitDiesSetSize)
, Dies()
{}
-
+
~CompileUnit() {
delete Die;
-
+
for (unsigned i = 0, N = Dies.size(); i < N; ++i)
delete Dies[i];
}
-
+
// Accessors.
CompileUnitDesc *getDesc() const { return Desc; }
unsigned getID() const { return ID; }
void AddGlobal(const std::string &Name, DIE *Die) {
Globals[Name] = Die;
}
-
+
/// getDieMapSlotFor - Returns the debug information entry map slot for the
/// specified debug descriptor.
DIE *&getDieMapSlotFor(DebugInfoDesc *DID) {
return DescToDieMap[DID];
}
-
+
/// getDIEntrySlotFor - Returns the debug information entry proxy slot for the
/// specified debug descriptor.
DIEntry *&getDIEntrySlotFor(DebugInfoDesc *DID) {
return DescToDIEntryMap[DID];
}
-
+
/// AddDie - Adds or interns the DIE to the compile unit.
///
DIE *AddDie(DIE &Buffer) {
Buffer.Profile(ID);
void *Where;
DIE *Die = DiesSet.FindNodeOrInsertPos(ID, Where);
-
+
if (!Die) {
Die = new DIE(Buffer);
DiesSet.InsertNode(Die, Where);
this->Die->AddChild(Die);
Buffer.Detach();
}
-
+
return Die;
}
};
//===----------------------------------------------------------------------===//
-/// Dwarf - Emits general Dwarf directives.
+/// Dwarf - Emits general Dwarf directives.
///
class Dwarf {
//===--------------------------------------------------------------------===//
// Core attributes used by the Dwarf writer.
//
-
+
//
/// O - Stream to .s file.
///
/// Asm - Target of Dwarf emission.
///
AsmPrinter *Asm;
-
- /// TAI - Target Asm Printer.
+
+ /// TAI - Target asm information.
const TargetAsmInfo *TAI;
-
+
/// TD - Target data.
const TargetData *TD;
-
+
/// RI - Register Information.
- const MRegisterInfo *RI;
-
+ const TargetRegisterInfo *RI;
+
/// M - Current module.
///
Module *M;
-
+
/// MF - Current machine function.
///
MachineFunction *MF;
-
+
/// MMI - Collected machine module information.
///
MachineModuleInfo *MMI;
-
- /// didInitial - Flag to indicate if initial emission has been done.
- ///
- bool didInitial;
-
- /// shouldEmit - Flag to indicate if debug information should be emitted.
- ///
- bool shouldEmit;
-
+
/// SubprogramCount - The running count of functions being compiled.
///
unsigned SubprogramCount;
-
- Dwarf(std::ostream &OS, AsmPrinter *A, const TargetAsmInfo *T)
+
+ /// Flavor - A unique string indicating what dwarf producer this is, used to
+ /// unique labels.
+ const char * const Flavor;
+
+ unsigned SetCounter;
+ Dwarf(std::ostream &OS, AsmPrinter *A, const TargetAsmInfo *T,
+ const char *flavor)
: O(OS)
, Asm(A)
, TAI(T)
, M(NULL)
, MF(NULL)
, MMI(NULL)
- , didInitial(false)
- , shouldEmit(false)
, SubprogramCount(0)
+ , Flavor(flavor)
+ , SetCounter(1)
{
}
// Accessors.
//
AsmPrinter *getAsm() const { return Asm; }
+ MachineModuleInfo *getMMI() const { return MMI; }
const TargetAsmInfo *getTargetAsmInfo() const { return TAI; }
+ const TargetData *getTargetData() const { return TD; }
- /// ShouldEmitDwarf - Returns true if Dwarf declarations should be made.
- ///
- bool ShouldEmitDwarf() const { return shouldEmit; }
-
-};
-
-//===----------------------------------------------------------------------===//
-/// DwarfDebug - Emits Dwarf debug directives.
-///
-class DwarfDebug : public Dwarf {
-
-private:
- //===--------------------------------------------------------------------===//
- // Attributes used to construct specific Dwarf sections.
- //
-
- /// CompileUnits - All the compile units involved in this build. The index
- /// of each entry in this vector corresponds to the sources in MMI.
- std::vector<CompileUnit *> CompileUnits;
-
- /// AbbreviationsSet - Used to uniquely define abbreviations.
- ///
- FoldingSet<DIEAbbrev> AbbreviationsSet;
-
- /// Abbreviations - A list of all the unique abbreviations in use.
- ///
- std::vector<DIEAbbrev *> Abbreviations;
-
- /// ValuesSet - Used to uniquely define values.
- ///
- FoldingSet<DIEValue> ValuesSet;
-
- /// Values - A list of all the unique values in use.
- ///
- std::vector<DIEValue *> Values;
-
- /// StringPool - A UniqueVector of strings used by indirect references.
- ///
- UniqueVector<std::string> StringPool;
-
- /// UnitMap - Map debug information descriptor to compile unit.
- ///
- std::map<DebugInfoDesc *, CompileUnit *> DescToUnitMap;
-
- /// SectionMap - Provides a unique id per text section.
- ///
- UniqueVector<std::string> SectionMap;
-
- /// SectionSourceLines - Tracks line numbers per text section.
- ///
- std::vector<std::vector<SourceLineInfo> > SectionSourceLines;
-
-
-public:
+ void PrintRelDirective(bool Force32Bit = false, bool isInSection = false)
+ const {
+ if (isInSection && TAI->getDwarfSectionOffsetDirective())
+ O << TAI->getDwarfSectionOffsetDirective();
+ else if (Force32Bit || TD->getPointerSize() == sizeof(int32_t))
+ O << TAI->getData32bitsDirective();
+ else
+ O << TAI->getData64bitsDirective();
+ }
/// PrintLabelName - Print label name in form used by Dwarf writer.
///
PrintLabelName(Label.Tag, Label.Number);
}
void PrintLabelName(const char *Tag, unsigned Number) const {
- O << TAI->getPrivateGlobalPrefix()
- << "debug_"
- << Tag;
+ O << TAI->getPrivateGlobalPrefix() << Tag;
+ if (Number) O << Number;
+ }
+
+ void PrintLabelName(const char *Tag, unsigned Number,
+ const char *Suffix) const {
+ O << TAI->getPrivateGlobalPrefix() << Tag;
if (Number) O << Number;
+ O << Suffix;
}
-
+
/// EmitLabel - Emit location label for internal use by Dwarf.
///
void EmitLabel(DWLabel Label) const {
PrintLabelName(Tag, Number);
O << ":\n";
}
-
+
/// EmitReference - Emit a reference to a label.
///
- void EmitReference(DWLabel Label) const {
- EmitReference(Label.Tag, Label.Number);
+ void EmitReference(DWLabel Label, bool IsPCRelative = false,
+ bool Force32Bit = false) const {
+ EmitReference(Label.Tag, Label.Number, IsPCRelative, Force32Bit);
}
- void EmitReference(const char *Tag, unsigned Number) const {
- if (TAI->getAddressSize() == sizeof(int32_t))
- O << TAI->getData32bitsDirective();
- else
- O << TAI->getData64bitsDirective();
-
+ void EmitReference(const char *Tag, unsigned Number,
+ bool IsPCRelative = false, bool Force32Bit = false) const {
+ PrintRelDirective(Force32Bit);
PrintLabelName(Tag, Number);
+
+ if (IsPCRelative) O << "-" << TAI->getPCSymbol();
}
- void EmitReference(const std::string &Name) const {
- if (TAI->getAddressSize() == sizeof(int32_t))
- O << TAI->getData32bitsDirective();
- else
- O << TAI->getData64bitsDirective();
-
+ void EmitReference(const std::string &Name, bool IsPCRelative = false,
+ bool Force32Bit = false) const {
+ PrintRelDirective(Force32Bit);
+
O << Name;
+
+ if (IsPCRelative) O << "-" << TAI->getPCSymbol();
}
/// EmitDifference - Emit the difference between two labels. Some
/// assemblers do not behave with absolute expressions with data directives,
/// so there is an option (needsSet) to use an intermediary set expression.
void EmitDifference(DWLabel LabelHi, DWLabel LabelLo,
- bool IsSmall = false) const {
+ bool IsSmall = false) {
EmitDifference(LabelHi.Tag, LabelHi.Number,
LabelLo.Tag, LabelLo.Number,
IsSmall);
}
void EmitDifference(const char *TagHi, unsigned NumberHi,
const char *TagLo, unsigned NumberLo,
- bool IsSmall = false) const {
+ bool IsSmall = false) {
if (TAI->needsSet()) {
- static unsigned SetCounter = 0;
-
O << "\t.set\t";
- PrintLabelName("set", SetCounter);
+ PrintLabelName("set", SetCounter, Flavor);
O << ",";
PrintLabelName(TagHi, NumberHi);
O << "-";
PrintLabelName(TagLo, NumberLo);
O << "\n";
-
- if (IsSmall || TAI->getAddressSize() == sizeof(int32_t))
- O << TAI->getData32bitsDirective();
- else
- O << TAI->getData64bitsDirective();
-
- PrintLabelName("set", SetCounter);
-
+
+ PrintRelDirective(IsSmall);
+ PrintLabelName("set", SetCounter, Flavor);
++SetCounter;
} else {
- if (IsSmall || TAI->getAddressSize() == sizeof(int32_t))
- O << TAI->getData32bitsDirective();
- else
- O << TAI->getData64bitsDirective();
-
+ PrintRelDirective(IsSmall);
+
PrintLabelName(TagHi, NumberHi);
O << "-";
PrintLabelName(TagLo, NumberLo);
}
}
-
- /// AssignAbbrevNumber - Define a unique number for the abbreviation.
- ///
- void AssignAbbrevNumber(DIEAbbrev &Abbrev) {
- // Profile the node so that we can make it unique.
- FoldingSetNodeID ID;
- Abbrev.Profile(ID);
-
- // Check the set for priors.
- DIEAbbrev *InSet = AbbreviationsSet.GetOrInsertNode(&Abbrev);
-
- // If it's newly added.
- if (InSet == &Abbrev) {
- // Add to abbreviation list.
- Abbreviations.push_back(&Abbrev);
- // Assign the vector position + 1 as its number.
- Abbrev.setNumber(Abbreviations.size());
- } else {
- // Assign existing abbreviation number.
- Abbrev.setNumber(InSet->getNumber());
- }
- }
- /// NewString - Add a string to the constant pool and returns a label.
- ///
- DWLabel NewString(const std::string &String) {
- unsigned StringID = StringPool.insert(String);
- return DWLabel("string", StringID);
- }
-
- /// NewDIEntry - Creates a new DIEntry to be a proxy for a debug information
- /// entry.
- DIEntry *NewDIEntry(DIE *Entry = NULL) {
- DIEntry *Value;
-
- if (Entry) {
- FoldingSetNodeID ID;
- DIEntry::Profile(ID, Entry);
- void *Where;
- Value = static_cast<DIEntry *>(ValuesSet.FindNodeOrInsertPos(ID, Where));
-
- if (Value) return Value;
-
- Value = new DIEntry(Entry);
- ValuesSet.InsertNode(Value, Where);
+ void EmitSectionOffset(const char* Label, const char* Section,
+ unsigned LabelNumber, unsigned SectionNumber,
+ bool IsSmall = false, bool isEH = false,
+ bool useSet = true) {
+ bool printAbsolute = false;
+ if (isEH)
+ printAbsolute = TAI->isAbsoluteEHSectionOffsets();
+ else
+ printAbsolute = TAI->isAbsoluteDebugSectionOffsets();
+
+ if (TAI->needsSet() && useSet) {
+ O << "\t.set\t";
+ PrintLabelName("set", SetCounter, Flavor);
+ O << ",";
+ PrintLabelName(Label, LabelNumber);
+
+ if (!printAbsolute) {
+ O << "-";
+ PrintLabelName(Section, SectionNumber);
+ }
+ O << "\n";
+
+ PrintRelDirective(IsSmall);
+
+ PrintLabelName("set", SetCounter, Flavor);
+ ++SetCounter;
} else {
- Value = new DIEntry(Entry);
+ PrintRelDirective(IsSmall, true);
+
+ PrintLabelName(Label, LabelNumber);
+
+ if (!printAbsolute) {
+ O << "-";
+ PrintLabelName(Section, SectionNumber);
+ }
}
-
- Values.push_back(Value);
- return Value;
}
-
+
+ /// EmitFrameMoves - Emit frame instructions to describe the layout of the
+ /// frame.
+ void EmitFrameMoves(const char *BaseLabel, unsigned BaseLabelID,
+ const std::vector<MachineMove> &Moves, bool isEH) {
+ int stackGrowth =
+ Asm->TM.getFrameInfo()->getStackGrowthDirection() ==
+ TargetFrameInfo::StackGrowsUp ?
+ TD->getPointerSize() : -TD->getPointerSize();
+ bool IsLocal = BaseLabel && strcmp(BaseLabel, "label") == 0;
+
+ for (unsigned i = 0, N = Moves.size(); i < N; ++i) {
+ const MachineMove &Move = Moves[i];
+ unsigned LabelID = Move.getLabelID();
+
+ if (LabelID) {
+ LabelID = MMI->MappedLabel(LabelID);
+
+ // Throw out move if the label is invalid.
+ if (!LabelID) continue;
+ }
+
+ const MachineLocation &Dst = Move.getDestination();
+ const MachineLocation &Src = Move.getSource();
+
+ // Advance row if new location.
+ if (BaseLabel && LabelID && (BaseLabelID != LabelID || !IsLocal)) {
+ Asm->EmitInt8(DW_CFA_advance_loc4);
+ Asm->EOL("DW_CFA_advance_loc4");
+ EmitDifference("label", LabelID, BaseLabel, BaseLabelID, true);
+ Asm->EOL();
+
+ BaseLabelID = LabelID;
+ BaseLabel = "label";
+ IsLocal = true;
+ }
+
+ // If advancing cfa.
+ if (Dst.isRegister() && Dst.getRegister() == MachineLocation::VirtualFP) {
+ if (!Src.isRegister()) {
+ if (Src.getRegister() == MachineLocation::VirtualFP) {
+ Asm->EmitInt8(DW_CFA_def_cfa_offset);
+ Asm->EOL("DW_CFA_def_cfa_offset");
+ } else {
+ Asm->EmitInt8(DW_CFA_def_cfa);
+ Asm->EOL("DW_CFA_def_cfa");
+ Asm->EmitULEB128Bytes(RI->getDwarfRegNum(Src.getRegister(), isEH));
+ Asm->EOL("Register");
+ }
+
+ int Offset = -Src.getOffset();
+
+ Asm->EmitULEB128Bytes(Offset);
+ Asm->EOL("Offset");
+ } else {
+ assert(0 && "Machine move no supported yet.");
+ }
+ } else if (Src.isRegister() &&
+ Src.getRegister() == MachineLocation::VirtualFP) {
+ if (Dst.isRegister()) {
+ Asm->EmitInt8(DW_CFA_def_cfa_register);
+ Asm->EOL("DW_CFA_def_cfa_register");
+ Asm->EmitULEB128Bytes(RI->getDwarfRegNum(Dst.getRegister(), isEH));
+ Asm->EOL("Register");
+ } else {
+ assert(0 && "Machine move no supported yet.");
+ }
+ } else {
+ unsigned Reg = RI->getDwarfRegNum(Src.getRegister(), isEH);
+ int Offset = Dst.getOffset() / stackGrowth;
+
+ if (Offset < 0) {
+ Asm->EmitInt8(DW_CFA_offset_extended_sf);
+ Asm->EOL("DW_CFA_offset_extended_sf");
+ Asm->EmitULEB128Bytes(Reg);
+ Asm->EOL("Reg");
+ Asm->EmitSLEB128Bytes(Offset);
+ Asm->EOL("Offset");
+ } else if (Reg < 64) {
+ Asm->EmitInt8(DW_CFA_offset + Reg);
+ if (VerboseAsm)
+ Asm->EOL("DW_CFA_offset + Reg (" + utostr(Reg) + ")");
+ else
+ Asm->EOL();
+ Asm->EmitULEB128Bytes(Offset);
+ Asm->EOL("Offset");
+ } else {
+ Asm->EmitInt8(DW_CFA_offset_extended);
+ Asm->EOL("DW_CFA_offset_extended");
+ Asm->EmitULEB128Bytes(Reg);
+ Asm->EOL("Reg");
+ Asm->EmitULEB128Bytes(Offset);
+ Asm->EOL("Offset");
+ }
+ }
+ }
+ }
+
+};
+
+//===----------------------------------------------------------------------===//
+/// DwarfDebug - Emits Dwarf debug directives.
+///
+class DwarfDebug : public Dwarf {
+
+private:
+ //===--------------------------------------------------------------------===//
+ // Attributes used to construct specific Dwarf sections.
+ //
+
+ /// CompileUnits - All the compile units involved in this build. The index
+ /// of each entry in this vector corresponds to the sources in MMI.
+ std::vector<CompileUnit *> CompileUnits;
+
+ /// AbbreviationsSet - Used to uniquely define abbreviations.
+ ///
+ FoldingSet<DIEAbbrev> AbbreviationsSet;
+
+ /// Abbreviations - A list of all the unique abbreviations in use.
+ ///
+ std::vector<DIEAbbrev *> Abbreviations;
+
+ /// ValuesSet - Used to uniquely define values.
+ ///
+ FoldingSet<DIEValue> ValuesSet;
+
+ /// Values - A list of all the unique values in use.
+ ///
+ std::vector<DIEValue *> Values;
+
+ /// StringPool - A UniqueVector of strings used by indirect references.
+ ///
+ UniqueVector<std::string> StringPool;
+
+ /// UnitMap - Map debug information descriptor to compile unit.
+ ///
+ std::map<DebugInfoDesc *, CompileUnit *> DescToUnitMap;
+
+ /// SectionMap - Provides a unique id per text section.
+ ///
+ UniqueVector<std::string> SectionMap;
+
+ /// SectionSourceLines - Tracks line numbers per text section.
+ ///
+ std::vector<std::vector<SourceLineInfo> > SectionSourceLines;
+
+ /// didInitial - Flag to indicate if initial emission has been done.
+ ///
+ bool didInitial;
+
+ /// shouldEmit - Flag to indicate if debug information should be emitted.
+ ///
+ bool shouldEmit;
+
+ struct FunctionDebugFrameInfo {
+ unsigned Number;
+ std::vector<MachineMove> Moves;
+
+ FunctionDebugFrameInfo(unsigned Num, const std::vector<MachineMove> &M):
+ Number(Num), Moves(M) { }
+ };
+
+ std::vector<FunctionDebugFrameInfo> DebugFrames;
+
+public:
+
+ /// ShouldEmitDwarf - Returns true if Dwarf declarations should be made.
+ ///
+ bool ShouldEmitDwarf() const { return shouldEmit; }
+
+ /// AssignAbbrevNumber - Define a unique number for the abbreviation.
+ ///
+ void AssignAbbrevNumber(DIEAbbrev &Abbrev) {
+ // Profile the node so that we can make it unique.
+ FoldingSetNodeID ID;
+ Abbrev.Profile(ID);
+
+ // Check the set for priors.
+ DIEAbbrev *InSet = AbbreviationsSet.GetOrInsertNode(&Abbrev);
+
+ // If it's newly added.
+ if (InSet == &Abbrev) {
+ // Add to abbreviation list.
+ Abbreviations.push_back(&Abbrev);
+ // Assign the vector position + 1 as its number.
+ Abbrev.setNumber(Abbreviations.size());
+ } else {
+ // Assign existing abbreviation number.
+ Abbrev.setNumber(InSet->getNumber());
+ }
+ }
+
+ /// NewString - Add a string to the constant pool and returns a label.
+ ///
+ DWLabel NewString(const std::string &String) {
+ unsigned StringID = StringPool.insert(String);
+ return DWLabel("string", StringID);
+ }
+
+ /// NewDIEntry - Creates a new DIEntry to be a proxy for a debug information
+ /// entry.
+ DIEntry *NewDIEntry(DIE *Entry = NULL) {
+ DIEntry *Value;
+
+ if (Entry) {
+ FoldingSetNodeID ID;
+ DIEntry::Profile(ID, Entry);
+ void *Where;
+ Value = static_cast<DIEntry *>(ValuesSet.FindNodeOrInsertPos(ID, Where));
+
+ if (Value) return Value;
+
+ Value = new DIEntry(Entry);
+ ValuesSet.InsertNode(Value, Where);
+ } else {
+ Value = new DIEntry(Entry);
+ }
+
+ Values.push_back(Value);
+ return Value;
+ }
+
/// SetDIEntry - Set a DIEntry once the debug information entry is defined.
///
void SetDIEntry(DIEntry *Value, DIE *Entry) {
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) {
ValuesSet.InsertNode(Value, Where);
Values.push_back(Value);
}
-
+
Die->AddValue(Attribute, Form, Value);
}
-
+
/// AddString - Add a std::string attribute data and value.
///
void AddString(DIE *Die, unsigned Attribute, unsigned Form,
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,
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,
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,
ValuesSet.InsertNode(Value, Where);
Values.push_back(Value);
}
-
+
Die->AddValue(Attribute, Form, Value);
}
-
+
/// AddDIEntry - Add a DIE attribute data and value.
///
void AddDIEntry(DIE *Die, unsigned Attribute, unsigned Form, DIE *Entry) {
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);
}
/// provided.
void AddAddress(DIE *Die, unsigned Attribute,
const MachineLocation &Location) {
- unsigned Reg = RI->getDwarfRegNum(Location.getRegister());
+ unsigned Reg = RI->getDwarfRegNum(Location.getRegister(), false);
DIEBlock *Block = new DIEBlock();
-
+
if (Location.isRegister()) {
if (Reg < 32) {
AddUInt(Block, 0, DW_FORM_data1, DW_OP_reg0 + Reg);
}
AddUInt(Block, 0, DW_FORM_sdata, Location.getOffset());
}
-
+
AddBlock(Die, Attribute, 0, Block);
}
-
+
/// AddBasicType - Add a new basic type attribute to the specified entity.
///
void AddBasicType(DIE *Entity, CompileUnit *Unit,
DIE *Die = ConstructBasicType(Unit, Name, Encoding, Size);
AddDIEntry(Entity, DW_AT_type, DW_FORM_ref4, Die);
}
-
+
/// ConstructBasicType - Construct a new basic type.
///
DIE *ConstructBasicType(CompileUnit *Unit,
if (!Name.empty()) AddString(&Buffer, DW_AT_name, DW_FORM_string, Name);
return Unit->AddDie(Buffer);
}
-
+
/// AddPointerType - Add a new pointer type attribute to the specified entity.
///
void AddPointerType(DIE *Entity, CompileUnit *Unit, const std::string &Name) {
DIE *Die = ConstructPointerType(Unit, Name);
AddDIEntry(Entity, DW_AT_type, DW_FORM_ref4, Die);
}
-
+
/// ConstructPointerType - Construct a new pointer type.
///
DIE *ConstructPointerType(CompileUnit *Unit, const std::string &Name) {
DIE Buffer(DW_TAG_pointer_type);
- AddUInt(&Buffer, DW_AT_byte_size, 0, TAI->getAddressSize());
+ AddUInt(&Buffer, DW_AT_byte_size, 0, TD->getPointerSize());
if (!Name.empty()) AddString(&Buffer, DW_AT_name, DW_FORM_string, Name);
return Unit->AddDie(Buffer);
}
-
+
/// AddType - Add a new type attribute to the specified entity.
///
void AddType(DIE *Entity, TypeDesc *TyDesc, CompileUnit *Unit) {
} else {
// Check for pre-existence.
DIEntry *&Slot = Unit->getDIEntrySlotFor(TyDesc);
-
+
// If it exists then use the existing value.
if (Slot) {
Entity->AddValue(DW_AT_type, DW_FORM_ref4, Slot);
return;
}
-
+
if (SubprogramDesc *SubprogramTy = dyn_cast<SubprogramDesc>(TyDesc)) {
// FIXME - Not sure why programs and variables are coming through here.
// Short cut for handling subprogram types (not really a TyDesc.)
// FIXME - Not sure why programs and variables are coming through here.
// Short cut for handling global variable types (not really a TyDesc.)
AddPointerType(Entity, Unit, GlobalTy->getName());
- } else {
+ } else {
// Set up proxy.
Slot = NewDIEntry();
-
+
// Construct type.
DIE Buffer(DW_TAG_base_type);
ConstructType(Buffer, TyDesc, Unit);
-
+
// Add debug information entry to entity and unit.
DIE *Die = Unit->AddDie(Buffer);
SetDIEntry(Slot, Die);
}
}
}
-
+
/// ConstructType - Adds all the required attributes to the type.
///
void ConstructType(DIE &Buffer, TypeDesc *TyDesc, CompileUnit *Unit) {
// Get core information.
const std::string &Name = TyDesc->getName();
uint64_t Size = TyDesc->getSize() >> 3;
-
+
if (BasicTypeDesc *BasicTy = dyn_cast<BasicTypeDesc>(TyDesc)) {
// Fundamental types like int, float, bool
Buffer.setTag(DW_TAG_base_type);
unsigned Tag = DerivedTy->getTag();
// FIXME - Workaround for templates.
if (Tag == DW_TAG_inheritance) Tag = DW_TAG_reference_type;
- // Pointers, typedefs et al.
+ // Pointers, typedefs et al.
Buffer.setTag(Tag);
// Map to main type, void will not have a type.
if (TypeDesc *FromTy = DerivedTy->getFromType())
} else if (CompositeTypeDesc *CompTy = dyn_cast<CompositeTypeDesc>(TyDesc)){
// Fetch tag.
unsigned Tag = CompTy->getTag();
-
+
// Set tag accordingly.
if (Tag == DW_TAG_vector_type)
Buffer.setTag(DW_TAG_array_type);
- else
+ else
Buffer.setTag(Tag);
std::vector<DebugInfoDesc *> &Elements = CompTy->getElements();
-
+
switch (Tag) {
case DW_TAG_vector_type:
AddUInt(&Buffer, DW_AT_GNU_vector, DW_FORM_flag, 1);
// Add element type.
if (TypeDesc *FromTy = CompTy->getFromType())
AddType(&Buffer, FromTy, Unit);
-
+
// Don't emit size attribute.
Size = 0;
-
+
// Construct an anonymous type for index type.
DIE *IndexTy = ConstructBasicType(Unit, "", DW_ATE_signed,
sizeof(int32_t));
-
+
// Add subranges to array type.
for(unsigned i = 0, N = Elements.size(); i < N; ++i) {
SubrangeDesc *SRD = cast<SubrangeDesc>(Elements[i]);
int64_t Lo = SRD->getLo();
int64_t Hi = SRD->getHi();
DIE *Subrange = new DIE(DW_TAG_subrange_type);
-
+
// If a range is available.
if (Lo != Hi) {
AddDIEntry(Subrange, DW_AT_type, DW_FORM_ref4, IndexTy);
if (Lo) AddSInt(Subrange, DW_AT_lower_bound, 0, Lo);
AddSInt(Subrange, DW_AT_upper_bound, 0, Hi);
}
-
+
Buffer.AddChild(Subrange);
}
break;
// Add elements to structure type.
for(unsigned i = 0, N = Elements.size(); i < N; ++i) {
DebugInfoDesc *Element = Elements[i];
-
+
if (DerivedTypeDesc *MemberDesc = dyn_cast<DerivedTypeDesc>(Element)){
// Add field or base class.
-
+
unsigned Tag = MemberDesc->getTag();
-
+
// Extract the basic information.
const std::string &Name = MemberDesc->getName();
uint64_t Size = MemberDesc->getSize();
uint64_t Align = MemberDesc->getAlign();
uint64_t Offset = MemberDesc->getOffset();
-
+
// Construct member debug information entry.
DIE *Member = new DIE(Tag);
-
+
// Add name if not "".
if (!Name.empty())
AddString(Member, DW_AT_name, DW_FORM_string, Name);
// Add location if available.
AddSourceLine(Member, MemberDesc->getFile(), MemberDesc->getLine());
-
+
// Most of the time the field info is the same as the members.
uint64_t FieldSize = Size;
uint64_t FieldAlign = Align;
uint64_t FieldOffset = Offset;
-
+
// Set the member type.
TypeDesc *FromTy = MemberDesc->getFromType();
AddType(Member, FromTy, Unit);
-
+
// Walk up typedefs until a real size is found.
while (FromTy) {
if (FromTy->getTag() != DW_TAG_typedef) {
FieldAlign = FromTy->getSize();
break;
}
-
- FromTy = dyn_cast<DerivedTypeDesc>(FromTy)->getFromType();
+
+ FromTy = cast<DerivedTypeDesc>(FromTy)->getFromType();
}
-
+
// Unless we have a bit field.
if (Tag == DW_TAG_member && FieldSize != Size) {
// Construct the alignment mask.
FieldOffset = HiMark - FieldSize;
// Now normalize offset to the field.
Offset -= FieldOffset;
-
+
// Maybe we need to work from the other end.
if (TD->isLittleEndian()) Offset = FieldSize - (Offset + Size);
-
+
// Add size and offset.
AddUInt(Member, DW_AT_byte_size, 0, FieldSize >> 3);
AddUInt(Member, DW_AT_bit_size, 0, Size);
AddUInt(Member, DW_AT_bit_offset, 0, Offset);
}
-
+
// Add computation for offset.
DIEBlock *Block = new DIEBlock();
AddUInt(Block, 0, DW_FORM_data1, DW_OP_plus_uconst);
} else if (Tag == DW_TAG_inheritance) {
AddUInt(Member, DW_AT_accessibility, 0, DW_ACCESS_public);
}
-
+
Buffer.AddChild(Member);
} else if (GlobalVariableDesc *StaticDesc =
dyn_cast<GlobalVariableDesc>(Element)) {
// Add static member.
-
+
// Construct member debug information entry.
DIE *Static = new DIE(DW_TAG_variable);
-
+
// Add name and mangled name.
const std::string &Name = StaticDesc->getName();
const std::string &LinkageName = StaticDesc->getLinkageName();
AddString(Static, DW_AT_MIPS_linkage_name, DW_FORM_string,
LinkageName);
}
-
+
// Add location.
AddSourceLine(Static, StaticDesc->getFile(), StaticDesc->getLine());
-
+
// Add type.
if (TypeDesc *StaticTy = StaticDesc->getType())
AddType(Static, StaticTy, Unit);
-
+
// Add flags.
if (!StaticDesc->isStatic())
AddUInt(Static, DW_AT_external, DW_FORM_flag, 1);
AddUInt(Static, DW_AT_declaration, DW_FORM_flag, 1);
-
+
Buffer.AddChild(Static);
} else if (SubprogramDesc *MethodDesc =
dyn_cast<SubprogramDesc>(Element)) {
// Add member function.
-
+
// Construct member debug information entry.
DIE *Method = new DIE(DW_TAG_subprogram);
-
+
// Add name and mangled name.
const std::string &Name = MethodDesc->getName();
const std::string &LinkageName = MethodDesc->getLinkageName();
-
- AddString(Method, DW_AT_name, DW_FORM_string, Name);
+
+ AddString(Method, DW_AT_name, DW_FORM_string, Name);
bool IsCTor = TyDesc->getName() == Name;
-
+
if (!LinkageName.empty()) {
AddString(Method, DW_AT_MIPS_linkage_name, DW_FORM_string,
LinkageName);
}
-
+
// Add location.
AddSourceLine(Method, MethodDesc->getFile(), MethodDesc->getLine());
-
+
// Add type.
if (CompositeTypeDesc *MethodTy =
dyn_cast_or_null<CompositeTypeDesc>(MethodDesc->getType())) {
// Get argument information.
std::vector<DebugInfoDesc *> &Args = MethodTy->getElements();
-
+
// If not a ctor.
if (!IsCTor) {
// Add return type.
AddType(Method, dyn_cast<TypeDesc>(Args[0]), Unit);
}
-
+
// Add arguments.
for(unsigned i = 1, N = Args.size(); i < N; ++i) {
DIE *Arg = new DIE(DW_TAG_formal_parameter);
if (!MethodDesc->isStatic())
AddUInt(Method, DW_AT_external, DW_FORM_flag, 1);
AddUInt(Method, DW_AT_declaration, DW_FORM_flag, 1);
-
+
Buffer.AddChild(Method);
}
}
AddUInt(&Buffer, DW_AT_prototyped, DW_FORM_flag, 1);
// Add return type.
AddType(&Buffer, dyn_cast<TypeDesc>(Elements[0]), Unit);
-
+
// Add arguments.
for(unsigned i = 1, N = Elements.size(); i < N; ++i) {
DIE *Arg = new DIE(DW_TAG_formal_parameter);
AddType(Arg, cast<TypeDesc>(Elements[i]), Unit);
Buffer.AddChild(Arg);
}
-
+
break;
}
default: break;
}
}
-
+
// Add size if non-zero (derived types don't have a size.)
if (Size) AddUInt(&Buffer, DW_AT_byte_size, 0, Size);
// Add name if not anonymous or intermediate type.
CompileUnit *NewCompileUnit(CompileUnitDesc *UnitDesc, unsigned ID) {
// Construct debug information entry.
DIE *Die = new DIE(DW_TAG_compile_unit);
- AddDelta(Die, DW_AT_stmt_list, DW_FORM_data4, DWLabel("section_line", 0),
- DWLabel("section_line", 0));
+ AddSectionOffset(Die, DW_AT_stmt_list, DW_FORM_data4,
+ DWLabel("section_line", 0), DWLabel("section_line", 0), false);
AddString(Die, DW_AT_producer, DW_FORM_string, UnitDesc->getProducer());
AddUInt (Die, DW_AT_language, DW_FORM_data1, UnitDesc->getLanguage());
AddString(Die, DW_AT_name, DW_FORM_string, UnitDesc->getFileName());
AddString(Die, DW_AT_comp_dir, DW_FORM_string, UnitDesc->getDirectory());
-
+
// Construct compile unit.
CompileUnit *Unit = new CompileUnit(UnitDesc, ID, Die);
-
+
// Add Unit to compile unit map.
DescToUnitMap[UnitDesc] = Unit;
-
+
return Unit;
}
// Check for pre-existence.
DIE *&Slot = Unit->getDieMapSlotFor(GVD);
if (Slot) return Slot;
-
+
// Get the global variable itself.
GlobalVariable *GV = GVD->getGlobalVariable();
AddType(VariableDie, GVD->getType(), Unit);
if (!GVD->isStatic())
AddUInt(VariableDie, DW_AT_external, DW_FORM_flag, 1);
-
+
// Add source line info if available.
AddSourceLine(VariableDie, UnitDesc, GVD->getLine());
-
+
// Add address.
DIEBlock *Block = new DIEBlock();
AddUInt(Block, 0, DW_FORM_data1, DW_OP_addr);
AddObjectLabel(Block, 0, DW_FORM_udata, Asm->getGlobalLinkName(GV));
AddBlock(VariableDie, DW_AT_location, 0, Block);
-
+
// Add to map.
Slot = VariableDie;
-
+
// Add to context owner.
Unit->getDie()->AddChild(VariableDie);
-
+
// Expose as global.
// FIXME - need to check external flag.
Unit->AddGlobal(FullName, VariableDie);
-
+
return VariableDie;
}
// Check for pre-existence.
DIE *&Slot = Unit->getDieMapSlotFor(SPD);
if (Slot) return Slot;
-
+
// Gather the details (simplify add attribute code.)
const std::string &Name = SPD->getName();
const std::string &FullName = SPD->getFullName();
const std::string &LinkageName = SPD->getLinkageName();
-
+
DIE *SubprogramDie = new DIE(DW_TAG_subprogram);
AddString(SubprogramDie, DW_AT_name, DW_FORM_string, Name);
if (!LinkageName.empty()) {
if (!SPD->isStatic())
AddUInt(SubprogramDie, DW_AT_external, DW_FORM_flag, 1);
AddUInt(SubprogramDie, DW_AT_prototyped, DW_FORM_flag, 1);
-
+
// Add source line info if available.
AddSourceLine(SubprogramDie, UnitDesc, SPD->getLine());
// Add to map.
Slot = SubprogramDie;
-
+
// Add to context owner.
Unit->getDie()->AddChild(SubprogramDie);
-
+
// Expose as global.
Unit->AddGlobal(FullName, SubprogramDie);
-
+
return SubprogramDie;
}
// Add source line info if available.
AddSourceLine(VariableDie, VD->getFile(), VD->getLine());
-
+
// Add variable type.
- AddType(VariableDie, VD->getType(), Unit);
-
+ AddType(VariableDie, VD->getType(), Unit);
+
// Add variable address.
MachineLocation Location;
- RI->getLocation(*MF, DV->getFrameIndex(), Location);
+ Location.set(RI->getFrameRegister(*MF),
+ RI->getFrameIndexOffset(*MF, DV->getFrameIndex()));
AddAddress(VariableDie, DW_AT_location, Location);
return VariableDie;
DIE *VariableDie = NewScopeVariable(Variables[i], Unit);
if (VariableDie) ParentDie->AddChild(VariableDie);
}
-
+
// Add nested scopes.
std::vector<DebugScope *> &Scopes = ParentScope->getScopes();
for (unsigned j = 0, M = Scopes.size(); j < M; ++j) {
DebugScope *Scope = Scopes[j];
// FIXME - Ignore inlined functions for the time being.
if (!Scope->getParent()) continue;
-
+
unsigned StartID = MMI->MappedLabel(Scope->getStartLabelID());
unsigned EndID = MMI->MappedLabel(Scope->getEndLabelID());
// Ignore empty scopes.
if (StartID == EndID && StartID != 0) continue;
if (Scope->getScopes().empty() && Scope->getVariables().empty()) continue;
-
+
if (StartID == ParentStartID && EndID == ParentEndID) {
// Just add stuff to the parent scope.
ConstructScope(Scope, ParentStartID, ParentEndID, ParentDie, Unit);
} else {
DIE *ScopeDie = new DIE(DW_TAG_lexical_block);
-
+
// Add the scope bounds.
if (StartID) {
AddLabel(ScopeDie, DW_AT_low_pc, DW_FORM_addr,
- DWLabel("loc", StartID));
+ 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("loc", EndID));
+ DWLabel("label", EndID));
} else {
AddLabel(ScopeDie, DW_AT_high_pc, DW_FORM_addr,
DWLabel("func_end", SubprogramCount));
}
-
+
// Add the scope contents.
ConstructScope(Scope, StartID, EndID, ScopeDie, Unit);
ParentDie->AddChild(ScopeDie);
void ConstructRootScope(DebugScope *RootScope) {
// Exit if there is no root scope.
if (!RootScope) return;
-
- // Get the subprogram debug information entry.
+
+ // Get the subprogram debug information entry.
SubprogramDesc *SPD = cast<SubprogramDesc>(RootScope->getDesc());
-
+
// Get the compile unit context.
CompileUnit *Unit = GetBaseCompileUnit();
-
+
// Get the subprogram die.
DIE *SPDie = Unit->getDieMapSlotFor(SPD);
assert(SPDie && "Missing subprogram descriptor");
-
+
// Add the function bounds.
AddLabel(SPDie, DW_AT_low_pc, DW_FORM_addr,
DWLabel("func_begin", SubprogramCount));
// Check to see if we already emitted intial headers.
if (didInitial) return;
didInitial = true;
-
+
// Dwarf sections base addresses.
- if (TAI->getDwarfRequiresFrameSection()) {
+ if (TAI->doesDwarfRequireFrameSection()) {
Asm->SwitchToDataSection(TAI->getDwarfFrameSection());
- EmitLabel("section_frame", 0);
+ EmitLabel("section_debug_frame", 0);
}
Asm->SwitchToDataSection(TAI->getDwarfInfoSection());
EmitLabel("section_info", 0);
EmitLabel("text_begin", 0);
Asm->SwitchToDataSection(TAI->getDataSection());
EmitLabel("data_begin", 0);
-
- // Emit common frame information.
- EmitInitialDebugFrame();
}
/// EmitDIE - Recusively Emits a debug information entry.
///
- void EmitDIE(DIE *Die) const {
+ void EmitDIE(DIE *Die) {
// Get the abbreviation for this DIE.
unsigned AbbrevNumber = Die->getAbbrevNumber();
const DIEAbbrev *Abbrev = Abbreviations[AbbrevNumber - 1];
-
- Asm->EOL("");
+
+ Asm->EOL();
// Emit the code (index) for the abbreviation.
Asm->EmitULEB128Bytes(AbbrevNumber);
- Asm->EOL(std::string("Abbrev [" +
- utostr(AbbrevNumber) +
- "] 0x" + utohexstr(Die->getOffset()) +
- ":0x" + utohexstr(Die->getSize()) + " " +
- TagString(Abbrev->getTag())));
-
- const std::vector<DIEValue *> &Values = Die->getValues();
- const std::vector<DIEAbbrevData> &AbbrevData = Abbrev->getData();
-
+
+ if (VerboseAsm)
+ Asm->EOL(std::string("Abbrev [" +
+ utostr(AbbrevNumber) +
+ "] 0x" + utohexstr(Die->getOffset()) +
+ ":0x" + utohexstr(Die->getSize()) + " " +
+ TagString(Abbrev->getTag())));
+ else
+ Asm->EOL();
+
+ SmallVector<DIEValue*, 32> &Values = Die->getValues();
+ const SmallVector<DIEAbbrevData, 8> &AbbrevData = Abbrev->getData();
+
// Emit the DIE attribute values.
for (unsigned i = 0, N = Values.size(); i < N; ++i) {
unsigned Attr = AbbrevData[i].getAttribute();
unsigned Form = AbbrevData[i].getForm();
assert(Form && "Too many attributes for DIE (check abbreviation)");
-
+
switch (Attr) {
case DW_AT_sibling: {
Asm->EmitInt32(Die->SiblingOffset());
break;
}
}
-
+
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");
}
}
unsigned SizeAndOffsetDie(DIE *Die, unsigned Offset, bool Last) {
// Get the children.
const std::vector<DIE *> &Children = Die->getChildren();
-
+
// If not last sibling and has children then add sibling offset attribute.
if (!Last && !Children.empty()) Die->AddSiblingOffset();
// Record the abbreviation.
AssignAbbrevNumber(Die->getAbbrev());
-
+
// Get the abbreviation for this DIE.
unsigned AbbrevNumber = Die->getAbbrevNumber();
const DIEAbbrev *Abbrev = Abbreviations[AbbrevNumber - 1];
// Set DIE offset
Die->setOffset(Offset);
-
+
// Start the size with the size of abbreviation code.
- Offset += Asm->SizeULEB128(AbbrevNumber);
-
- const std::vector<DIEValue *> &Values = Die->getValues();
- const std::vector<DIEAbbrevData> &AbbrevData = Abbrev->getData();
+ Offset += TargetAsmInfo::getULEB128Size(AbbrevNumber);
+
+ const SmallVector<DIEValue*, 32> &Values = Die->getValues();
+ const SmallVector<DIEAbbrevData, 8> &AbbrevData = Abbrev->getData();
// Size the DIE attribute values.
for (unsigned i = 0, N = Values.size(); i < N; ++i) {
// Size attribute value.
Offset += Values[i]->SizeOf(*this, AbbrevData[i].getForm());
}
-
+
// Size the DIE children if any.
if (!Children.empty()) {
assert(Abbrev->getChildrenFlag() == DW_CHILDREN_yes &&
"Children flag not set");
-
+
for (unsigned j = 0, M = Children.size(); j < M; ++j) {
Offset = SizeAndOffsetDie(Children[j], Offset, (j + 1) == M);
}
-
+
// End of children marker.
Offset += sizeof(int8_t);
}
SizeAndOffsetDie(Unit->getDie(), Offset, true);
}
- /// EmitFrameMoves - Emit frame instructions to describe the layout of the
- /// frame.
- void EmitFrameMoves(const char *BaseLabel, unsigned BaseLabelID,
- std::vector<MachineMove> &Moves) {
- int stackGrowth =
- Asm->TM.getFrameInfo()->getStackGrowthDirection() ==
- TargetFrameInfo::StackGrowsUp ?
- TAI->getAddressSize() : -TAI->getAddressSize();
-
- for (unsigned i = 0, N = Moves.size(); i < N; ++i) {
- MachineMove &Move = Moves[i];
- unsigned LabelID = Move.getLabelID();
-
- if (LabelID) {
- LabelID = MMI->MappedLabel(LabelID);
-
- // Throw out move if the label is invalid.
- if (!LabelID) continue;
- }
-
- const MachineLocation &Dst = Move.getDestination();
- const MachineLocation &Src = Move.getSource();
-
- // Advance row if new location.
- if (BaseLabel && LabelID && BaseLabelID != LabelID) {
- Asm->EmitInt8(DW_CFA_advance_loc4);
- Asm->EOL("DW_CFA_advance_loc4");
- EmitDifference("loc", LabelID, BaseLabel, BaseLabelID, true);
- Asm->EOL("");
-
- BaseLabelID = LabelID;
- BaseLabel = "loc";
- }
-
- // If advancing cfa.
- if (Dst.isRegister() && Dst.getRegister() == MachineLocation::VirtualFP) {
- if (!Src.isRegister()) {
- if (Src.getRegister() == MachineLocation::VirtualFP) {
- Asm->EmitInt8(DW_CFA_def_cfa_offset);
- Asm->EOL("DW_CFA_def_cfa_offset");
- } else {
- Asm->EmitInt8(DW_CFA_def_cfa);
- Asm->EOL("DW_CFA_def_cfa");
- Asm->EmitULEB128Bytes(RI->getDwarfRegNum(Src.getRegister()));
- Asm->EOL("Register");
- }
-
- int Offset = Src.getOffset() / stackGrowth;
-
- Asm->EmitULEB128Bytes(Offset);
- Asm->EOL("Offset");
- } else {
- assert(0 && "Machine move no supported yet.");
- }
- } else if (Src.isRegister() &&
- Src.getRegister() == MachineLocation::VirtualFP) {
- if (Dst.isRegister()) {
- Asm->EmitInt8(DW_CFA_def_cfa_register);
- Asm->EOL("DW_CFA_def_cfa_register");
- Asm->EmitULEB128Bytes(RI->getDwarfRegNum(Dst.getRegister()));
- Asm->EOL("Register");
- } else {
- assert(0 && "Machine move no supported yet.");
- }
- } else {
- unsigned Reg = RI->getDwarfRegNum(Src.getRegister());
- int Offset = Dst.getOffset() / stackGrowth;
-
- if (Offset < 0) {
- Asm->EmitInt8(DW_CFA_offset_extended_sf);
- Asm->EOL("DW_CFA_offset_extended_sf");
- Asm->EmitULEB128Bytes(Reg);
- Asm->EOL("Reg");
- Asm->EmitSLEB128Bytes(Offset);
- Asm->EOL("Offset");
- } else if (Reg < 64) {
- Asm->EmitInt8(DW_CFA_offset + Reg);
- Asm->EOL("DW_CFA_offset + Reg");
- Asm->EmitULEB128Bytes(Offset);
- Asm->EOL("Offset");
- } else {
- Asm->EmitInt8(DW_CFA_offset_extended);
- Asm->EOL("DW_CFA_offset_extended");
- Asm->EmitULEB128Bytes(Reg);
- Asm->EOL("Reg");
- Asm->EmitULEB128Bytes(Offset);
- Asm->EOL("Offset");
- }
- }
- }
- }
-
/// EmitDebugInfo - Emit the debug info section.
///
- void EmitDebugInfo() const {
+ void EmitDebugInfo() {
// Start debug info section.
Asm->SwitchToDataSection(TAI->getDwarfInfoSection());
-
+
CompileUnit *Unit = GetBaseCompileUnit();
DIE *Die = Unit->getDie();
// Emit the compile units header.
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");
- EmitDifference("abbrev_begin", 0, "section_abbrev", 0, true);
+ EmitSectionOffset("abbrev_begin", "section_abbrev", 0, 0, true, false);
Asm->EOL("Offset Into Abbrev. Section");
- Asm->EmitInt8(TAI->getAddressSize()); Asm->EOL("Address Size (in bytes)");
-
+ 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");
EmitLabel("info_end", Unit->getID());
-
- Asm->EOL("");
+
+ Asm->EOL();
}
/// EmitAbbreviations - Emit the abbreviation section.
if (!Abbreviations.empty()) {
// Start the debug abbrev section.
Asm->SwitchToDataSection(TAI->getDwarfAbbrevSection());
-
+
EmitLabel("abbrev_begin", 0);
-
+
// For each abbrevation.
for (unsigned i = 0, N = Abbreviations.size(); i < N; ++i) {
// Get abbreviation data
const DIEAbbrev *Abbrev = Abbreviations[i];
-
+
// Emit the abbrevations code (base 1 index.)
Asm->EmitULEB128Bytes(Abbrev->getNumber());
Asm->EOL("Abbreviation Code");
-
+
// Emit the abbreviations data.
Abbrev->Emit(*this);
-
- Asm->EOL("");
+
+ Asm->EOL();
}
-
+
+ // Mark end of abbreviations.
+ Asm->EmitULEB128Bytes(0); Asm->EOL("EOM(3)");
+
EmitLabel("abbrev_end", 0);
-
- Asm->EOL("");
+
+ 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() const {
+ 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).
// 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_fixed_advance_pc arg count");
const UniqueVector<std::string> &Directories = MMI->getDirectories();
- const UniqueVector<SourceFileInfo>
- &SourceFiles = MMI->getSourceFiles();
+ const UniqueVector<SourceFileInfo> &SourceFiles = MMI->getSourceFiles();
// Emit directories.
for (unsigned DirectoryID = 1, NDID = Directories.size();
Asm->EmitString(Directories[DirectoryID]); Asm->EOL("Directory");
}
Asm->EmitInt8(0); Asm->EOL("End of directories");
-
+
// Emit files.
for (unsigned SourceID = 1, NSID = SourceFiles.size();
SourceID <= NSID; ++SourceID) {
Asm->EOL("File size");
}
Asm->EmitInt8(0); Asm->EOL("End of files");
-
+
EmitLabel("line_prolog_end", 0);
-
+
// A sequence for each text section.
- for (unsigned j = 0, M = SectionSourceLines.size(); j < M; ++j) {
+ unsigned SecSrcLinesSize = SectionSourceLines.size();
+
+ for (unsigned j = 0; j < SecSrcLinesSize; ++j) {
// Isolate current sections line info.
const std::vector<SourceLineInfo> &LineInfos = SectionSourceLines[j];
-
- Asm->EOL(std::string("Section ") + SectionMap[j + 1]);
+
+ if (VerboseAsm)
+ Asm->EOL(std::string("Section ") + SectionMap[j + 1]);
+ else
+ Asm->EOL();
// Dwarf assumes we start with first line of first source file.
unsigned Source = 1;
unsigned Line = 1;
-
+
// Construct rows of the address, source, line, column matrix.
for (unsigned i = 0, N = LineInfos.size(); i < N; ++i) {
const SourceLineInfo &LineInfo = LineInfos[i];
unsigned LabelID = MMI->MappedLabel(LineInfo.getLabelID());
if (!LabelID) continue;
-
+
unsigned SourceID = LineInfo.getSourceID();
const SourceFileInfo &SourceFile = SourceFiles[SourceID];
unsigned DirectoryID = SourceFile.getDirectoryID();
- Asm->EOL(Directories[DirectoryID]
- + SourceFile.getName()
- + ":"
- + utostr_32(LineInfo.getLine()));
+ if (VerboseAsm)
+ Asm->EOL(Directories[DirectoryID]
+ + SourceFile.getName()
+ + ":"
+ + utostr_32(LineInfo.getLine()));
+ else
+ Asm->EOL();
// Define the line address.
Asm->EmitInt8(0); Asm->EOL("Extended Op");
- Asm->EmitInt8(TAI->getAddressSize() + 1); Asm->EOL("Op size");
+ Asm->EmitInt8(TD->getPointerSize() + 1); Asm->EOL("Op size");
Asm->EmitInt8(DW_LNE_set_address); Asm->EOL("DW_LNE_set_address");
- EmitReference("loc", LabelID); Asm->EOL("Location label");
-
+ 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.
}
}
- // Define last address of section.
- Asm->EmitInt8(0); Asm->EOL("Extended Op");
- Asm->EmitInt8(TAI->getAddressSize() + 1); Asm->EOL("Op size");
- Asm->EmitInt8(DW_LNE_set_address); Asm->EOL("DW_LNE_set_address");
- EmitReference("section_end", j + 1); Asm->EOL("Section end label");
-
- // Mark end of matrix.
- Asm->EmitInt8(0); Asm->EOL("DW_LNE_end_sequence");
- Asm->EmitULEB128Bytes(1); Asm->EOL("");
- Asm->EmitInt8(1); Asm->EOL("");
+ 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("");
+
+ Asm->EOL();
}
-
- /// EmitInitialDebugFrame - Emit common frame info into a debug frame section.
+
+ /// EmitCommonDebugFrame - Emit common frame info into a debug frame section.
///
- void EmitInitialDebugFrame() {
- if (!TAI->getDwarfRequiresFrameSection())
+ void EmitCommonDebugFrame() {
+ if (!TAI->doesDwarfRequireFrameSection())
return;
int stackGrowth =
Asm->TM.getFrameInfo()->getStackGrowthDirection() ==
TargetFrameInfo::StackGrowsUp ?
- TAI->getAddressSize() : -TAI->getAddressSize();
+ TD->getPointerSize() : -TD->getPointerSize();
// Start the dwarf frame section.
Asm->SwitchToDataSection(TAI->getDwarfFrameSection());
- EmitLabel("frame_common", 0);
- EmitDifference("frame_common_end", 0,
- "frame_common_begin", 0, true);
+ 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("frame_common_begin", 0);
+ EmitLabel("debug_frame_common_begin", 0);
Asm->EmitInt32((int)DW_CIE_ID);
Asm->EOL("CIE Identifier Tag");
Asm->EmitInt8(DW_CIE_VERSION);
Asm->EmitULEB128Bytes(1);
Asm->EOL("CIE Code Alignment Factor");
Asm->EmitSLEB128Bytes(stackGrowth);
- Asm->EOL("CIE Data Alignment Factor");
- Asm->EmitInt8(RI->getDwarfRegNum(RI->getRARegister()));
+ Asm->EOL("CIE 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);
- Asm->EmitAlignment(2);
- EmitLabel("frame_common_end", 0);
-
- Asm->EOL("");
+ 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() {
- if (!TAI->getDwarfRequiresFrameSection())
+ void EmitFunctionDebugFrame(const FunctionDebugFrameInfo &DebugFrameInfo) {
+ if (!TAI->doesDwarfRequireFrameSection())
return;
-
+
// Start the dwarf frame section.
Asm->SwitchToDataSection(TAI->getDwarfFrameSection());
-
- EmitDifference("frame_end", SubprogramCount,
- "frame_begin", SubprogramCount, true);
+
+ EmitDifference("debug_frame_end", DebugFrameInfo.Number,
+ "debug_frame_begin", DebugFrameInfo.Number, true);
Asm->EOL("Length of Frame Information Entry");
-
- EmitLabel("frame_begin", SubprogramCount);
-
- EmitDifference("frame_common", 0, "section_frame", 0, true);
+
+ 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", SubprogramCount);
+ EmitReference("func_begin", DebugFrameInfo.Number);
Asm->EOL("FDE initial location");
- EmitDifference("func_end", SubprogramCount,
- "func_begin", SubprogramCount);
+ EmitDifference("func_end", DebugFrameInfo.Number,
+ "func_begin", DebugFrameInfo.Number);
Asm->EOL("FDE address range");
-
- std::vector<MachineMove> &Moves = MMI->getFrameMoves();
-
- EmitFrameMoves("func_begin", SubprogramCount, Moves);
-
- Asm->EmitAlignment(2);
- EmitLabel("frame_end", SubprogramCount);
- Asm->EOL("");
+ EmitFrameMoves("func_begin", DebugFrameInfo.Number, DebugFrameInfo.Moves, false);
+
+ Asm->EmitAlignment(2, 0, 0, false);
+ EmitLabel("debug_frame_end", DebugFrameInfo.Number);
+
+ Asm->EOL();
}
/// EmitDebugPubNames - Emit visible names into a debug pubnames section.
void EmitDebugPubNames() {
// Start the dwarf pubnames section.
Asm->SwitchToDataSection(TAI->getDwarfPubNamesSection());
-
- CompileUnit *Unit = GetBaseCompileUnit();
-
+
+ CompileUnit *Unit = GetBaseCompileUnit();
+
EmitDifference("pubnames_end", Unit->getID(),
"pubnames_begin", Unit->getID(), true);
Asm->EOL("Length of Public Names Info");
-
+
EmitLabel("pubnames_begin", Unit->getID());
-
+
Asm->EmitInt16(DWARF_VERSION); Asm->EOL("DWARF Version");
-
- EmitDifference("info_begin", Unit->getID(), "section_info", 0, true);
+
+ EmitSectionOffset("info_begin", "section_info",
+ Unit->getID(), 0, true, false);
Asm->EOL("Offset of Compilation Unit Info");
EmitDifference("info_end", Unit->getID(), "info_begin", Unit->getID(),true);
Asm->EOL("Compilation Unit Length");
-
+
std::map<std::string, DIE *> &Globals = Unit->getGlobals();
-
+
for (std::map<std::string, DIE *>::iterator GI = Globals.begin(),
GE = Globals.end();
GI != GE; ++GI) {
const std::string &Name = GI->first;
DIE * Entity = GI->second;
-
+
Asm->EmitInt32(Entity->getOffset()); Asm->EOL("DIE offset");
Asm->EmitString(Name); Asm->EOL("External Name");
}
-
+
Asm->EmitInt32(0); Asm->EOL("End Mark");
EmitLabel("pubnames_end", Unit->getID());
-
- Asm->EOL("");
+
+ Asm->EOL();
}
/// EmitDebugStr - Emit visible names into a debug str section.
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) {
EmitLabel("string", StringID);
// Emit the string itself.
const std::string &String = StringPool[StringID];
- Asm->EmitString(String); Asm->EOL("");
+ Asm->EmitString(String); Asm->EOL();
}
-
- Asm->EOL("");
+
+ Asm->EOL();
}
}
void EmitDebugLoc() {
// Start the dwarf loc section.
Asm->SwitchToDataSection(TAI->getDwarfLocSection());
-
- Asm->EOL("");
+
+ 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();
-
+ CompileUnit *Unit = GetBaseCompileUnit();
+
// Don't include size of length
Asm->EmitInt32(0x1c); Asm->EOL("Length of Address Ranges Info");
-
+
Asm->EmitInt16(DWARF_VERSION); Asm->EOL("Dwarf Version");
-
+
EmitReference("info_begin", Unit->getID());
Asm->EOL("Offset of Compilation Unit Info");
- Asm->EmitInt8(TAI->getAddressSize()); Asm->EOL("Size of Address");
+ Asm->EmitInt8(TD->getPointerSize()); Asm->EOL("Size of Address");
Asm->EmitInt8(0); Asm->EOL("Size of Segment Descriptor");
Asm->EmitInt32(0); Asm->EOL("EOM (1)");
Asm->EmitInt32(0); Asm->EOL("EOM (2)");
-
- Asm->EOL("");
#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("");
+
+ Asm->EOL();
}
/// EmitDebugMacInfo - Emit visible names into a debug macinfo section.
void EmitDebugMacInfo() {
// Start the dwarf macinfo section.
Asm->SwitchToDataSection(TAI->getDwarfMacInfoSection());
-
- Asm->EOL("");
+
+ Asm->EOL();
}
/// ConstructCompileUnitDIEs - Create a compile unit DIE for each source and
/// header file.
void ConstructCompileUnitDIEs() {
const UniqueVector<CompileUnitDesc *> CUW = MMI->getCompileUnits();
-
+
for (unsigned i = 1, N = CUW.size(); i <= N; ++i) {
unsigned ID = MMI->RecordSource(CUW[i]);
CompileUnit *Unit = NewCompileUnit(CUW[i], ID);
/// ConstructGlobalDIEs - Create DIEs for each of the externally visible
/// global variables.
void ConstructGlobalDIEs() {
- std::vector<GlobalVariableDesc *> GlobalVariables =
- MMI->getAnchoredDescriptors<GlobalVariableDesc>(*M);
-
+ std::vector<GlobalVariableDesc *> GlobalVariables;
+ MMI->getAnchoredDescriptors<GlobalVariableDesc>(*M, GlobalVariables);
+
for (unsigned i = 0, N = GlobalVariables.size(); i < N; ++i) {
GlobalVariableDesc *GVD = GlobalVariables[i];
NewGlobalVariable(GVD);
/// ConstructSubprogramDIEs - Create DIEs for each of the externally visible
/// subprograms.
void ConstructSubprogramDIEs() {
- std::vector<SubprogramDesc *> Subprograms =
- MMI->getAnchoredDescriptors<SubprogramDesc>(*M);
-
+ std::vector<SubprogramDesc *> Subprograms;
+ MMI->getAnchoredDescriptors<SubprogramDesc>(*M, Subprograms);
+
for (unsigned i = 0, N = Subprograms.size(); i < N; ++i) {
SubprogramDesc *SPD = Subprograms[i];
NewSubprogram(SPD);
// Main entry points.
//
DwarfDebug(std::ostream &OS, AsmPrinter *A, const TargetAsmInfo *T)
- : Dwarf(OS, A, T)
+ : Dwarf(OS, A, T, "dbg")
, CompileUnits()
, AbbreviationsSet(InitAbbreviationsSetSize)
, Abbreviations()
, DescToUnitMap()
, SectionMap()
, SectionSourceLines()
+ , didInitial(false)
+ , shouldEmit(false)
{
}
virtual ~DwarfDebug() {
if (!MMI && mmi->hasDebugInfo()) {
MMI = mmi;
shouldEmit = true;
-
- // Emit initial sections
- EmitInitial();
-
+
// Create all the compile unit DIEs.
ConstructCompileUnitDIEs();
-
+
// Create DIEs for each of the externally visible global variables.
ConstructGlobalDIEs();
// Create DIEs for each of the externally visible subprograms.
ConstructSubprogramDIEs();
-
+
// Prime section data.
SectionMap.insert(TAI->getTextSection());
+
+ // Print out .file directives to specify files for .loc directives. These
+ // are printed out early so that they precede any .loc directives.
+ if (TAI->hasDotLocAndDotFile()) {
+ const UniqueVector<SourceFileInfo> &SourceFiles = MMI->getSourceFiles();
+ const UniqueVector<std::string> &Directories = MMI->getDirectories();
+ for (unsigned i = 1, e = SourceFiles.size(); i <= e; ++i) {
+ sys::Path FullPath(Directories[SourceFiles[i].getDirectoryID()]);
+ bool AppendOk = FullPath.appendComponent(SourceFiles[i].getName());
+ assert(AppendOk && "Could not append filename to directory!");
+ Asm->EmitFile(i, FullPath.toString());
+ Asm->EOL();
+ }
+ }
+
+ // Emit initial sections
+ EmitInitial();
}
}
/// content.
void BeginModule(Module *M) {
this->M = M;
-
- if (!ShouldEmitDwarf()) return;
}
/// EndModule - Emit all Dwarf sections that should come after the content.
///
void EndModule() {
if (!ShouldEmitDwarf()) return;
-
+
// Standard sections final addresses.
Asm->SwitchToTextSection(TAI->getTextSection());
EmitLabel("text_end", 0);
Asm->SwitchToDataSection(TAI->getDataSection());
EmitLabel("data_end", 0);
-
+
// End text sections.
for (unsigned i = 1, N = SectionMap.size(); i <= N; ++i) {
Asm->SwitchToTextSection(SectionMap[i].c_str());
EmitLabel("section_end", i);
}
-
+
+ // Emit common frame information.
+ EmitCommonDebugFrame();
+
+ // Emit function debug frame information
+ for (std::vector<FunctionDebugFrameInfo>::iterator I = DebugFrames.begin(),
+ E = DebugFrames.end(); I != E; ++I)
+ EmitFunctionDebugFrame(*I);
+
// Compute DIE offsets and sizes.
SizeAndOffsets();
-
+
// Emit all the DIEs into a debug info section
EmitDebugInfo();
-
+
// Corresponding abbreviations into a abbrev section.
EmitAbbreviations();
-
+
// Emit source line correspondence into a debug line section.
EmitDebugLines();
-
+
// Emit info into a debug pubnames section.
EmitDebugPubNames();
-
+
// Emit info into a debug str section.
EmitDebugStr();
-
+
// Emit info into a debug loc section.
EmitDebugLoc();
-
+
// Emit info into a debug aranges section.
EmitDebugARanges();
-
+
// Emit info into a debug ranges section.
EmitDebugRanges();
-
+
// Emit info into a debug macinfo section.
EmitDebugMacInfo();
}
- /// BeginFunction - Gather pre-function debug information. Assumes being
+ /// BeginFunction - Gather pre-function debug information. Assumes being
/// emitted immediately after the function entry point.
void BeginFunction(MachineFunction *MF) {
this->MF = MF;
-
+
if (!ShouldEmitDwarf()) return;
// Begin accumulating function debug information.
MMI->BeginFunction(MF);
-
+
// Assumes in correct section after the entry point.
EmitLabel("func_begin", ++SubprogramCount);
- }
-
- /// PreExceptionEndFunction - Close off function before exception handling
- /// tables.
- void PreExceptionEndFunction() {
- if (!ShouldEmitDwarf()) return;
-
- // Define end label for subprogram.
- EmitLabel("func_end", SubprogramCount);
+
+ // Emit label for the implicitly defined dbg.stoppoint at the start of
+ // the function.
+ const std::vector<SourceLineInfo> &LineInfos = MMI->getSourceLines();
+ if (!LineInfos.empty()) {
+ const SourceLineInfo &LineInfo = LineInfos[0];
+ Asm->printLabel(LineInfo.getLabelID());
+ }
}
/// EndFunction - Gather and emit post-function debug information.
///
void EndFunction() {
if (!ShouldEmitDwarf()) return;
-
+
+ // Define end label for subprogram.
+ EmitLabel("func_end", SubprogramCount);
+
// Get function line info.
const std::vector<SourceLineInfo> &LineInfos = MMI->getSourceLines();
SectionLineInfos.insert(SectionLineInfos.end(),
LineInfos.begin(), LineInfos.end());
}
-
+
// Construct scopes for subprogram.
ConstructRootScope(MMI->getRootScope());
-
- // Emit function frame information.
- EmitFunctionDebugFrame();
-
- // Reset the line numbers for the next function.
- MMI->ClearLineInfo();
- // Clear function debug information.
- MMI->EndFunction();
+ DebugFrames.push_back(FunctionDebugFrameInfo(SubprogramCount,
+ MMI->getFrameMoves()));
}
};
//===----------------------------------------------------------------------===//
-/// DwarfException - Emits Dwarf exception handling directives.
+/// DwarfException - Emits Dwarf exception handling directives.
///
class DwarfException : public Dwarf {
+private:
+ struct FunctionEHFrameInfo {
+ std::string FnName;
+ unsigned Number;
+ unsigned PersonalityIndex;
+ bool hasCalls;
+ bool hasLandingPads;
+ std::vector<MachineMove> Moves;
+ const Function * function;
+
+ FunctionEHFrameInfo(const std::string &FN, unsigned Num, unsigned P,
+ bool hC, bool hL,
+ const std::vector<MachineMove> &M,
+ const Function *f):
+ FnName(FN), Number(Num), PersonalityIndex(P),
+ hasCalls(hC), hasLandingPads(hL), Moves(M), function (f) { }
+ };
+
+ std::vector<FunctionEHFrameInfo> EHFrames;
+
+ /// shouldEmitTable - Per-function flag to indicate if EH tables should
+ /// be emitted.
+ bool shouldEmitTable;
+
+ /// shouldEmitMoves - Per-function flag to indicate if frame moves info
+ /// should be emitted.
+ bool shouldEmitMoves;
+
+ /// shouldEmitTableModule - Per-module flag to indicate if EH tables
+ /// should be emitted.
+ bool shouldEmitTableModule;
+
+ /// shouldEmitFrameModule - Per-module flag to indicate if frame moves
+ /// should be emitted.
+ bool shouldEmitMovesModule;
+
+ /// EmitCommonEHFrame - Emit the common eh unwind frame.
+ ///
+ void EmitCommonEHFrame(const Function *Personality, unsigned Index) {
+ // Size and sign of stack growth.
+ int stackGrowth =
+ Asm->TM.getFrameInfo()->getStackGrowthDirection() ==
+ TargetFrameInfo::StackGrowsUp ?
+ TD->getPointerSize() : -TD->getPointerSize();
+
+ // Begin eh frame section.
+ Asm->SwitchToTextSection(TAI->getDwarfEHFrameSection());
+ O << "EH_frame" << Index << ":\n";
+ EmitLabel("section_eh_frame", Index);
+
+ // Define base labels.
+ EmitLabel("eh_frame_common", Index);
+
+ // Define the eh frame length.
+ EmitDifference("eh_frame_common_end", Index,
+ "eh_frame_common_begin", Index, true);
+ Asm->EOL("Length of Common Information Entry");
+
+ // EH frame header.
+ EmitLabel("eh_frame_common_begin", Index);
+ Asm->EmitInt32((int)0);
+ Asm->EOL("CIE Identifier Tag");
+ Asm->EmitInt8(DW_CIE_VERSION);
+ Asm->EOL("CIE Version");
+
+ // The personality presence indicates that language specific information
+ // will show up in the eh frame.
+ Asm->EmitString(Personality ? "zPLR" : "zR");
+ Asm->EOL("CIE Augmentation");
+
+ // Round out reader.
+ Asm->EmitULEB128Bytes(1);
+ Asm->EOL("CIE Code Alignment Factor");
+ Asm->EmitSLEB128Bytes(stackGrowth);
+ Asm->EOL("CIE Data Alignment Factor");
+ Asm->EmitInt8(RI->getDwarfRegNum(RI->getRARegister(), true));
+ Asm->EOL("CIE Return Address Column");
+
+ // If there is a personality, we need to indicate the functions location.
+ if (Personality) {
+ Asm->EmitULEB128Bytes(7);
+ Asm->EOL("Augmentation Size");
+
+ if (TAI->getNeedsIndirectEncoding()) {
+ Asm->EmitInt8(DW_EH_PE_pcrel | DW_EH_PE_sdata4 | DW_EH_PE_indirect);
+ Asm->EOL("Personality (pcrel sdata4 indirect)");
+ } else {
+ Asm->EmitInt8(DW_EH_PE_pcrel | DW_EH_PE_sdata4);
+ Asm->EOL("Personality (pcrel sdata4)");
+ }
+
+ PrintRelDirective(true);
+ O << TAI->getPersonalityPrefix();
+ Asm->EmitExternalGlobal((const GlobalVariable *)(Personality));
+ O << TAI->getPersonalitySuffix();
+ if (strcmp(TAI->getPersonalitySuffix(), "+4@GOTPCREL"))
+ O << "-" << TAI->getPCSymbol();
+ Asm->EOL("Personality");
+
+ Asm->EmitInt8(DW_EH_PE_pcrel | DW_EH_PE_sdata4);
+ Asm->EOL("LSDA Encoding (pcrel sdata4)");
+ Asm->EmitInt8(DW_EH_PE_pcrel | DW_EH_PE_sdata4);
+ Asm->EOL("FDE Encoding (pcrel sdata4)");
+ } else {
+ Asm->EmitULEB128Bytes(1);
+ Asm->EOL("Augmentation Size");
+ Asm->EmitInt8(DW_EH_PE_pcrel | DW_EH_PE_sdata4);
+ Asm->EOL("FDE Encoding (pcrel sdata4)");
+ }
+
+ // Indicate locations of general callee saved registers in frame.
+ std::vector<MachineMove> Moves;
+ RI->getInitialFrameState(Moves);
+ EmitFrameMoves(NULL, 0, Moves, true);
+
+ // On Darwin the linker honors the alignment of eh_frame, which means it
+ // must be 8-byte on 64-bit targets to match what gcc does. Otherwise
+ // you get holes which confuse readers of eh_frame.
+ Asm->EmitAlignment(TD->getPointerSize() == sizeof(int32_t) ? 2 : 3,
+ 0, 0, false);
+ EmitLabel("eh_frame_common_end", Index);
+
+ Asm->EOL();
+ }
+
+ /// EmitEHFrame - Emit function exception frame information.
+ ///
+ void EmitEHFrame(const FunctionEHFrameInfo &EHFrameInfo) {
+ Function::LinkageTypes linkage = EHFrameInfo.function->getLinkage();
+
+ Asm->SwitchToTextSection(TAI->getDwarfEHFrameSection());
+
+ // Externally visible entry into the functions eh frame info.
+ // If the corresponding function is static, this should not be
+ // externally visible.
+ if (linkage != Function::InternalLinkage) {
+ if (const char *GlobalEHDirective = TAI->getGlobalEHDirective())
+ O << GlobalEHDirective << EHFrameInfo.FnName << "\n";
+ }
+
+ // If corresponding function is weak definition, this should be too.
+ if ((linkage == Function::WeakLinkage ||
+ linkage == Function::LinkOnceLinkage) &&
+ TAI->getWeakDefDirective())
+ O << TAI->getWeakDefDirective() << EHFrameInfo.FnName << "\n";
+
+ // If there are no calls then you can't unwind. This may mean we can
+ // omit the EH Frame, but some environments do not handle weak absolute
+ // symbols.
+ // If UnwindTablesMandatory is set we cannot do this optimization; the
+ // unwind info is to be available for non-EH uses.
+ if (!EHFrameInfo.hasCalls &&
+ !UnwindTablesMandatory &&
+ ((linkage != Function::WeakLinkage &&
+ linkage != Function::LinkOnceLinkage) ||
+ !TAI->getWeakDefDirective() ||
+ TAI->getSupportsWeakOmittedEHFrame()))
+ {
+ O << EHFrameInfo.FnName << " = 0\n";
+ // This name has no connection to the function, so it might get
+ // dead-stripped when the function is not, erroneously. Prohibit
+ // dead-stripping unconditionally.
+ if (const char *UsedDirective = TAI->getUsedDirective())
+ O << UsedDirective << EHFrameInfo.FnName << "\n\n";
+ } else {
+ O << EHFrameInfo.FnName << ":\n";
+
+ // EH frame header.
+ EmitDifference("eh_frame_end", EHFrameInfo.Number,
+ "eh_frame_begin", EHFrameInfo.Number, true);
+ Asm->EOL("Length of Frame Information Entry");
+
+ EmitLabel("eh_frame_begin", EHFrameInfo.Number);
+
+ EmitSectionOffset("eh_frame_begin", "eh_frame_common",
+ EHFrameInfo.Number, EHFrameInfo.PersonalityIndex,
+ true, true, false);
+ Asm->EOL("FDE CIE offset");
+
+ EmitReference("eh_func_begin", EHFrameInfo.Number, true, true);
+ Asm->EOL("FDE initial location");
+ EmitDifference("eh_func_end", EHFrameInfo.Number,
+ "eh_func_begin", EHFrameInfo.Number, true);
+ Asm->EOL("FDE address range");
+
+ // If there is a personality and landing pads then point to the language
+ // specific data area in the exception table.
+ if (EHFrameInfo.PersonalityIndex) {
+ Asm->EmitULEB128Bytes(4);
+ Asm->EOL("Augmentation size");
+
+ if (EHFrameInfo.hasLandingPads)
+ EmitReference("exception", EHFrameInfo.Number, true, true);
+ else
+ Asm->EmitInt32((int)0);
+ Asm->EOL("Language Specific Data Area");
+ } else {
+ Asm->EmitULEB128Bytes(0);
+ Asm->EOL("Augmentation size");
+ }
+
+ // Indicate locations of function specific callee saved registers in
+ // frame.
+ EmitFrameMoves("eh_func_begin", EHFrameInfo.Number, EHFrameInfo.Moves, true);
+
+ // On Darwin the linker honors the alignment of eh_frame, which means it
+ // must be 8-byte on 64-bit targets to match what gcc does. Otherwise
+ // you get holes which confuse readers of eh_frame.
+ Asm->EmitAlignment(TD->getPointerSize() == sizeof(int32_t) ? 2 : 3,
+ 0, 0, false);
+ EmitLabel("eh_frame_end", EHFrameInfo.Number);
+
+ // If the function is marked used, this table should be also. We cannot
+ // make the mark unconditional in this case, since retaining the table
+ // also retains the function in this case, and there is code around
+ // that depends on unused functions (calling undefined externals) being
+ // dead-stripped to link correctly. Yes, there really is.
+ if (MMI->getUsedFunctions().count(EHFrameInfo.function))
+ if (const char *UsedDirective = TAI->getUsedDirective())
+ O << UsedDirective << EHFrameInfo.FnName << "\n\n";
+ }
+ }
+
+ /// EmitExceptionTable - Emit landing pads and actions.
+ ///
+ /// The general organization of the table is complex, but the basic concepts
+ /// are easy. First there is a header which describes the location and
+ /// organization of the three components that follow.
+ /// 1. The landing pad site information describes the range of code covered
+ /// by the try. In our case it's an accumulation of the ranges covered
+ /// by the invokes in the try. There is also a reference to the landing
+ /// pad that handles the exception once processed. Finally an index into
+ /// the actions table.
+ /// 2. The action table, in our case, is composed of pairs of type ids
+ /// and next action offset. Starting with the action index from the
+ /// landing pad site, each type Id is checked for a match to the current
+ /// exception. If it matches then the exception and type id are passed
+ /// on to the landing pad. Otherwise the next action is looked up. This
+ /// chain is terminated with a next action of zero. If no type id is
+ /// found the the frame is unwound and handling continues.
+ /// 3. Type id table contains references to all the C++ typeinfo for all
+ /// catches in the function. This tables is reversed indexed base 1.
+
+ /// SharedTypeIds - How many leading type ids two landing pads have in common.
+ static unsigned SharedTypeIds(const LandingPadInfo *L,
+ const LandingPadInfo *R) {
+ const std::vector<int> &LIds = L->TypeIds, &RIds = R->TypeIds;
+ unsigned LSize = LIds.size(), RSize = RIds.size();
+ unsigned MinSize = LSize < RSize ? LSize : RSize;
+ unsigned Count = 0;
+
+ for (; Count != MinSize; ++Count)
+ if (LIds[Count] != RIds[Count])
+ return Count;
+
+ return Count;
+ }
+
+ /// PadLT - Order landing pads lexicographically by type id.
+ static bool PadLT(const LandingPadInfo *L, const LandingPadInfo *R) {
+ const std::vector<int> &LIds = L->TypeIds, &RIds = R->TypeIds;
+ unsigned LSize = LIds.size(), RSize = RIds.size();
+ unsigned MinSize = LSize < RSize ? LSize : RSize;
+
+ for (unsigned i = 0; i != MinSize; ++i)
+ if (LIds[i] != RIds[i])
+ return LIds[i] < RIds[i];
+
+ return LSize < RSize;
+ }
+
+ struct KeyInfo {
+ static inline unsigned getEmptyKey() { return -1U; }
+ static inline unsigned getTombstoneKey() { return -2U; }
+ static unsigned getHashValue(const unsigned &Key) { return Key; }
+ static bool isEqual(unsigned LHS, unsigned RHS) { return LHS == RHS; }
+ static bool isPod() { return true; }
+ };
+
+ /// ActionEntry - Structure describing an entry in the actions table.
+ struct ActionEntry {
+ int ValueForTypeID; // The value to write - may not be equal to the type id.
+ int NextAction;
+ struct ActionEntry *Previous;
+ };
+
+ /// PadRange - Structure holding a try-range and the associated landing pad.
+ struct PadRange {
+ // The index of the landing pad.
+ unsigned PadIndex;
+ // The index of the begin and end labels in the landing pad's label lists.
+ unsigned RangeIndex;
+ };
+
+ typedef DenseMap<unsigned, PadRange, KeyInfo> RangeMapType;
+
+ /// CallSiteEntry - Structure describing an entry in the call-site table.
+ struct CallSiteEntry {
+ // The 'try-range' is BeginLabel .. EndLabel.
+ unsigned BeginLabel; // zero indicates the start of the function.
+ unsigned EndLabel; // zero indicates the end of the function.
+ // The landing pad starts at PadLabel.
+ unsigned PadLabel; // zero indicates that there is no landing pad.
+ unsigned Action;
+ };
+
+ void EmitExceptionTable() {
+ const std::vector<GlobalVariable *> &TypeInfos = MMI->getTypeInfos();
+ const std::vector<unsigned> &FilterIds = MMI->getFilterIds();
+ const std::vector<LandingPadInfo> &PadInfos = MMI->getLandingPads();
+ if (PadInfos.empty()) return;
+
+ // Sort the landing pads in order of their type ids. This is used to fold
+ // duplicate actions.
+ SmallVector<const LandingPadInfo *, 64> LandingPads;
+ LandingPads.reserve(PadInfos.size());
+ for (unsigned i = 0, N = PadInfos.size(); i != N; ++i)
+ LandingPads.push_back(&PadInfos[i]);
+ std::sort(LandingPads.begin(), LandingPads.end(), PadLT);
+
+ // Negative type ids index into FilterIds, positive type ids index into
+ // TypeInfos. The value written for a positive type id is just the type
+ // id itself. For a negative type id, however, the value written is the
+ // (negative) byte offset of the corresponding FilterIds entry. The byte
+ // offset is usually equal to the type id, because the FilterIds entries
+ // are written using a variable width encoding which outputs one byte per
+ // entry as long as the value written is not too large, but can differ.
+ // This kind of complication does not occur for positive type ids because
+ // type infos are output using a fixed width encoding.
+ // FilterOffsets[i] holds the byte offset corresponding to FilterIds[i].
+ SmallVector<int, 16> FilterOffsets;
+ FilterOffsets.reserve(FilterIds.size());
+ int Offset = -1;
+ for(std::vector<unsigned>::const_iterator I = FilterIds.begin(),
+ E = FilterIds.end(); I != E; ++I) {
+ FilterOffsets.push_back(Offset);
+ Offset -= TargetAsmInfo::getULEB128Size(*I);
+ }
+
+ // Compute the actions table and gather the first action index for each
+ // landing pad site.
+ SmallVector<ActionEntry, 32> Actions;
+ SmallVector<unsigned, 64> FirstActions;
+ FirstActions.reserve(LandingPads.size());
+
+ int FirstAction = 0;
+ unsigned SizeActions = 0;
+ for (unsigned i = 0, N = LandingPads.size(); i != N; ++i) {
+ const LandingPadInfo *LP = LandingPads[i];
+ const std::vector<int> &TypeIds = LP->TypeIds;
+ const unsigned NumShared = i ? SharedTypeIds(LP, LandingPads[i-1]) : 0;
+ unsigned SizeSiteActions = 0;
+
+ if (NumShared < TypeIds.size()) {
+ unsigned SizeAction = 0;
+ ActionEntry *PrevAction = 0;
+
+ if (NumShared) {
+ const unsigned SizePrevIds = LandingPads[i-1]->TypeIds.size();
+ assert(Actions.size());
+ PrevAction = &Actions.back();
+ SizeAction = TargetAsmInfo::getSLEB128Size(PrevAction->NextAction) +
+ TargetAsmInfo::getSLEB128Size(PrevAction->ValueForTypeID);
+ for (unsigned j = NumShared; j != SizePrevIds; ++j) {
+ SizeAction -=
+ TargetAsmInfo::getSLEB128Size(PrevAction->ValueForTypeID);
+ SizeAction += -PrevAction->NextAction;
+ PrevAction = PrevAction->Previous;
+ }
+ }
+
+ // Compute the actions.
+ for (unsigned I = NumShared, M = TypeIds.size(); I != M; ++I) {
+ int TypeID = TypeIds[I];
+ assert(-1-TypeID < (int)FilterOffsets.size() && "Unknown filter id!");
+ int ValueForTypeID = TypeID < 0 ? FilterOffsets[-1 - TypeID] : TypeID;
+ unsigned SizeTypeID = TargetAsmInfo::getSLEB128Size(ValueForTypeID);
+
+ int NextAction = SizeAction ? -(SizeAction + SizeTypeID) : 0;
+ SizeAction = SizeTypeID + TargetAsmInfo::getSLEB128Size(NextAction);
+ SizeSiteActions += SizeAction;
+
+ ActionEntry Action = {ValueForTypeID, NextAction, PrevAction};
+ Actions.push_back(Action);
+
+ PrevAction = &Actions.back();
+ }
+
+ // Record the first action of the landing pad site.
+ FirstAction = SizeActions + SizeSiteActions - SizeAction + 1;
+ } // else identical - re-use previous FirstAction
+
+ FirstActions.push_back(FirstAction);
+
+ // Compute this sites contribution to size.
+ SizeActions += SizeSiteActions;
+ }
+
+ // Compute the call-site table. The entry for an invoke has a try-range
+ // containing the call, a non-zero landing pad and an appropriate action.
+ // The entry for an ordinary call has a try-range containing the call and
+ // zero for the landing pad and the action. Calls marked 'nounwind' have
+ // no entry and must not be contained in the try-range of any entry - they
+ // form gaps in the table. Entries must be ordered by try-range address.
+ SmallVector<CallSiteEntry, 64> CallSites;
+
+ RangeMapType PadMap;
+ // Invokes and nounwind calls have entries in PadMap (due to being bracketed
+ // by try-range labels when lowered). Ordinary calls do not, so appropriate
+ // try-ranges for them need be deduced.
+ for (unsigned i = 0, N = LandingPads.size(); i != N; ++i) {
+ const LandingPadInfo *LandingPad = LandingPads[i];
+ for (unsigned j = 0, E = LandingPad->BeginLabels.size(); j != E; ++j) {
+ unsigned BeginLabel = LandingPad->BeginLabels[j];
+ assert(!PadMap.count(BeginLabel) && "Duplicate landing pad labels!");
+ PadRange P = { i, j };
+ PadMap[BeginLabel] = P;
+ }
+ }
+
+ // The end label of the previous invoke or nounwind try-range.
+ unsigned LastLabel = 0;
+
+ // Whether there is a potentially throwing instruction (currently this means
+ // an ordinary call) between the end of the previous try-range and now.
+ bool SawPotentiallyThrowing = false;
+
+ // Whether the last callsite entry was for an invoke.
+ bool PreviousIsInvoke = false;
+
+ // Visit all instructions in order of address.
+ for (MachineFunction::const_iterator I = MF->begin(), E = MF->end();
+ I != E; ++I) {
+ for (MachineBasicBlock::const_iterator MI = I->begin(), E = I->end();
+ MI != E; ++MI) {
+ if (!MI->isLabel()) {
+ SawPotentiallyThrowing |= MI->getDesc().isCall();
+ continue;
+ }
+
+ unsigned BeginLabel = MI->getOperand(0).getImm();
+ assert(BeginLabel && "Invalid label!");
+
+ // End of the previous try-range?
+ if (BeginLabel == LastLabel)
+ SawPotentiallyThrowing = false;
+
+ // Beginning of a new try-range?
+ RangeMapType::iterator L = PadMap.find(BeginLabel);
+ if (L == PadMap.end())
+ // Nope, it was just some random label.
+ continue;
+
+ PadRange P = L->second;
+ const LandingPadInfo *LandingPad = LandingPads[P.PadIndex];
+
+ assert(BeginLabel == LandingPad->BeginLabels[P.RangeIndex] &&
+ "Inconsistent landing pad map!");
+
+ // If some instruction between the previous try-range and this one may
+ // throw, create a call-site entry with no landing pad for the region
+ // between the try-ranges.
+ if (SawPotentiallyThrowing) {
+ CallSiteEntry Site = {LastLabel, BeginLabel, 0, 0};
+ CallSites.push_back(Site);
+ PreviousIsInvoke = false;
+ }
+
+ LastLabel = LandingPad->EndLabels[P.RangeIndex];
+ assert(BeginLabel && LastLabel && "Invalid landing pad!");
+
+ if (LandingPad->LandingPadLabel) {
+ // This try-range is for an invoke.
+ CallSiteEntry Site = {BeginLabel, LastLabel,
+ LandingPad->LandingPadLabel, FirstActions[P.PadIndex]};
+
+ // Try to merge with the previous call-site.
+ if (PreviousIsInvoke) {
+ CallSiteEntry &Prev = CallSites.back();
+ if (Site.PadLabel == Prev.PadLabel && Site.Action == Prev.Action) {
+ // Extend the range of the previous entry.
+ Prev.EndLabel = Site.EndLabel;
+ continue;
+ }
+ }
+
+ // Otherwise, create a new call-site.
+ CallSites.push_back(Site);
+ PreviousIsInvoke = true;
+ } else {
+ // Create a gap.
+ PreviousIsInvoke = false;
+ }
+ }
+ }
+ // If some instruction between the previous try-range and the end of the
+ // function may throw, create a call-site entry with no landing pad for the
+ // region following the try-range.
+ if (SawPotentiallyThrowing) {
+ CallSiteEntry Site = {LastLabel, 0, 0, 0};
+ CallSites.push_back(Site);
+ }
+
+ // Final tallies.
+
+ // Call sites.
+ const unsigned SiteStartSize = sizeof(int32_t); // DW_EH_PE_udata4
+ const unsigned SiteLengthSize = sizeof(int32_t); // DW_EH_PE_udata4
+ const unsigned LandingPadSize = sizeof(int32_t); // DW_EH_PE_udata4
+ unsigned SizeSites = CallSites.size() * (SiteStartSize +
+ SiteLengthSize +
+ LandingPadSize);
+ for (unsigned i = 0, e = CallSites.size(); i < e; ++i)
+ SizeSites += TargetAsmInfo::getULEB128Size(CallSites[i].Action);
+
+ // Type infos.
+ const unsigned TypeInfoSize = TD->getPointerSize(); // DW_EH_PE_absptr
+ unsigned SizeTypes = TypeInfos.size() * TypeInfoSize;
+
+ unsigned TypeOffset = sizeof(int8_t) + // Call site format
+ TargetAsmInfo::getULEB128Size(SizeSites) + // Call-site table length
+ SizeSites + SizeActions + SizeTypes;
+
+ unsigned TotalSize = sizeof(int8_t) + // LPStart format
+ sizeof(int8_t) + // TType format
+ TargetAsmInfo::getULEB128Size(TypeOffset) + // TType base offset
+ TypeOffset;
+
+ unsigned SizeAlign = (4 - TotalSize) & 3;
+
+ // Begin the exception table.
+ Asm->SwitchToDataSection(TAI->getDwarfExceptionSection());
+ O << "GCC_except_table" << SubprogramCount << ":\n";
+ Asm->EmitAlignment(2, 0, 0, false);
+ for (unsigned i = 0; i != SizeAlign; ++i) {
+ Asm->EmitInt8(0);
+ Asm->EOL("Padding");
+ }
+ EmitLabel("exception", SubprogramCount);
+
+ // Emit the header.
+ Asm->EmitInt8(DW_EH_PE_omit);
+ Asm->EOL("LPStart format (DW_EH_PE_omit)");
+ Asm->EmitInt8(DW_EH_PE_absptr);
+ Asm->EOL("TType format (DW_EH_PE_absptr)");
+ Asm->EmitULEB128Bytes(TypeOffset);
+ Asm->EOL("TType base offset");
+ Asm->EmitInt8(DW_EH_PE_udata4);
+ Asm->EOL("Call site format (DW_EH_PE_udata4)");
+ Asm->EmitULEB128Bytes(SizeSites);
+ Asm->EOL("Call-site table length");
+
+ // Emit the landing pad site information.
+ for (unsigned i = 0; i < CallSites.size(); ++i) {
+ CallSiteEntry &S = CallSites[i];
+ const char *BeginTag;
+ unsigned BeginNumber;
+
+ if (!S.BeginLabel) {
+ BeginTag = "eh_func_begin";
+ BeginNumber = SubprogramCount;
+ } else {
+ BeginTag = "label";
+ BeginNumber = S.BeginLabel;
+ }
+
+ EmitSectionOffset(BeginTag, "eh_func_begin", BeginNumber, SubprogramCount,
+ true, true);
+ Asm->EOL("Region start");
+
+ if (!S.EndLabel) {
+ EmitDifference("eh_func_end", SubprogramCount, BeginTag, BeginNumber,
+ true);
+ } else {
+ EmitDifference("label", S.EndLabel, BeginTag, BeginNumber, true);
+ }
+ Asm->EOL("Region length");
+
+ if (!S.PadLabel)
+ Asm->EmitInt32(0);
+ else
+ EmitSectionOffset("label", "eh_func_begin", S.PadLabel, SubprogramCount,
+ true, true);
+ Asm->EOL("Landing pad");
+
+ Asm->EmitULEB128Bytes(S.Action);
+ Asm->EOL("Action");
+ }
+
+ // Emit the actions.
+ for (unsigned I = 0, N = Actions.size(); I != N; ++I) {
+ ActionEntry &Action = Actions[I];
+
+ Asm->EmitSLEB128Bytes(Action.ValueForTypeID);
+ Asm->EOL("TypeInfo index");
+ Asm->EmitSLEB128Bytes(Action.NextAction);
+ Asm->EOL("Next action");
+ }
+
+ // Emit the type ids.
+ for (unsigned M = TypeInfos.size(); M; --M) {
+ GlobalVariable *GV = TypeInfos[M - 1];
+
+ PrintRelDirective();
+
+ if (GV)
+ O << Asm->getGlobalLinkName(GV);
+ else
+ O << "0";
+
+ Asm->EOL("TypeInfo");
+ }
+
+ // Emit the filter typeids.
+ for (unsigned j = 0, M = FilterIds.size(); j < M; ++j) {
+ unsigned TypeID = FilterIds[j];
+ Asm->EmitULEB128Bytes(TypeID);
+ Asm->EOL("Filter TypeInfo index");
+ }
+
+ Asm->EmitAlignment(2, 0, 0, false);
+ }
+
public:
//===--------------------------------------------------------------------===//
// Main entry points.
//
DwarfException(std::ostream &OS, AsmPrinter *A, const TargetAsmInfo *T)
- : Dwarf(OS, A, T)
+ : Dwarf(OS, A, T, "eh")
+ , shouldEmitTable(false)
+ , shouldEmitMoves(false)
+ , shouldEmitTableModule(false)
+ , shouldEmitMovesModule(false)
{}
-
+
virtual ~DwarfException() {}
/// SetModuleInfo - Set machine module information when it's known that pass
/// manager has created it. Set by the target AsmPrinter.
void SetModuleInfo(MachineModuleInfo *mmi) {
- // Make sure initial declarations are made.
- if (!MMI && TAI->getSupportsExceptionHandling()) {
- MMI = mmi;
- shouldEmit = true;
- }
+ MMI = mmi;
}
/// BeginModule - Emit all exception information that should come prior to the
/// content.
void BeginModule(Module *M) {
this->M = M;
-
- if (!ShouldEmitDwarf()) return;
}
/// EndModule - Emit all exception information that should come after the
/// content.
void EndModule() {
- if (!ShouldEmitDwarf()) return;
+ if (shouldEmitMovesModule || shouldEmitTableModule) {
+ const std::vector<Function *> Personalities = MMI->getPersonalities();
+ for (unsigned i =0; i < Personalities.size(); ++i)
+ EmitCommonEHFrame(Personalities[i], i);
+
+ for (std::vector<FunctionEHFrameInfo>::iterator I = EHFrames.begin(),
+ E = EHFrames.end(); I != E; ++I)
+ EmitEHFrame(*I);
+ }
}
- /// BeginFunction - Gather pre-function exception information. Assumes being
+ /// BeginFunction - Gather pre-function exception information. Assumes being
/// emitted immediately after the function entry point.
void BeginFunction(MachineFunction *MF) {
this->MF = MF;
-
- if (!ShouldEmitDwarf()) return;
+ shouldEmitTable = shouldEmitMoves = false;
+ if (MMI && TAI->doesSupportExceptionHandling()) {
+
+ // Map all labels and get rid of any dead landing pads.
+ MMI->TidyLandingPads();
+ // If any landing pads survive, we need an EH table.
+ if (MMI->getLandingPads().size())
+ shouldEmitTable = true;
+
+ // See if we need frame move info.
+ if (!MF->getFunction()->doesNotThrow() || UnwindTablesMandatory)
+ shouldEmitMoves = true;
+
+ if (shouldEmitMoves || shouldEmitTable)
+ // Assumes in correct section after the entry point.
+ EmitLabel("eh_func_begin", ++SubprogramCount);
+ }
+ shouldEmitTableModule |= shouldEmitTable;
+ shouldEmitMovesModule |= shouldEmitMoves;
}
/// EndFunction - Gather and emit post-function exception information.
///
void EndFunction() {
- if (!ShouldEmitDwarf()) return;
-#if 0
- if (const char *GlobalDirective = TAI->getGlobalDirective())
- O << GlobalDirective << getAsm()->CurrentFnName << ".eh\n";
-
- O << getAsm()->CurrentFnName << ".eh = 0\n";
-
- if (const char *UsedDirective = TAI->getUsedDirective())
- O << UsedDirective << getAsm()->CurrentFnName << ".eh\n";
-#endif
+ if (shouldEmitMoves || shouldEmitTable) {
+ EmitLabel("eh_func_end", SubprogramCount);
+ EmitExceptionTable();
+
+ // Save EH frame information
+ EHFrames.
+ push_back(FunctionEHFrameInfo(getAsm()->getCurrentFunctionEHName(MF),
+ SubprogramCount,
+ MMI->getPersonalityIndex(),
+ MF->getFrameInfo()->hasCalls(),
+ !MMI->getLandingPads().empty(),
+ MMI->getFrameMoves(),
+ MF->getFunction()));
+ }
}
};
// Emit its Dwarf tag type.
DD.getAsm()->EmitULEB128Bytes(Tag);
DD.getAsm()->EOL(TagString(Tag));
-
+
// Emit whether it has children DIEs.
DD.getAsm()->EmitULEB128Bytes(ChildrenFlag);
DD.getAsm()->EOL(ChildrenString(ChildrenFlag));
-
+
// For each attribute description.
for (unsigned i = 0, N = Data.size(); i < N; ++i) {
const DIEAbbrevData &AttrData = Data[i];
-
+
// Emit attribute type.
DD.getAsm()->EmitULEB128Bytes(AttrData.getAttribute());
DD.getAsm()->EOL(AttributeString(AttrData.getAttribute()));
-
+
// Emit form type.
DD.getAsm()->EmitULEB128Bytes(AttrData.getForm());
DD.getAsm()->EOL(FormEncodingString(AttrData.getForm()));
<< " "
<< ChildrenString(ChildrenFlag)
<< "\n";
-
+
for (unsigned i = 0, N = Data.size(); i < N; ++i) {
O << " "
<< AttributeString(Data[i].getAttribute())
/// EmitValue - Emit integer of appropriate size.
///
-void DIEInteger::EmitValue(const DwarfDebug &DD, unsigned Form) const {
+void DIEInteger::EmitValue(DwarfDebug &DD, unsigned Form) {
switch (Form) {
case DW_FORM_flag: // Fall thru
case DW_FORM_ref1: // Fall thru
case DW_FORM_data4: return sizeof(int32_t);
case DW_FORM_ref8: // Fall thru
case DW_FORM_data8: return sizeof(int64_t);
- case DW_FORM_udata: return DD.getAsm()->SizeULEB128(Integer);
- case DW_FORM_sdata: return DD.getAsm()->SizeSLEB128(Integer);
+ case DW_FORM_udata: return TargetAsmInfo::getULEB128Size(Integer);
+ case DW_FORM_sdata: return TargetAsmInfo::getSLEB128Size(Integer);
default: assert(0 && "DIE Value form not supported yet"); break;
}
return 0;
/// EmitValue - Emit string value.
///
-void DIEString::EmitValue(const DwarfDebug &DD, unsigned Form) const {
+void DIEString::EmitValue(DwarfDebug &DD, unsigned Form) {
DD.getAsm()->EmitString(String);
}
/// EmitValue - Emit label value.
///
-void DIEDwarfLabel::EmitValue(const DwarfDebug &DD, unsigned Form) const {
- DD.EmitReference(Label);
+void DIEDwarfLabel::EmitValue(DwarfDebug &DD, unsigned Form) {
+ bool IsSmall = Form == DW_FORM_data4;
+ DD.EmitReference(Label, false, IsSmall);
}
/// SizeOf - Determine size of label value in bytes.
///
unsigned DIEDwarfLabel::SizeOf(const DwarfDebug &DD, unsigned Form) const {
- return DD.getTargetAsmInfo()->getAddressSize();
+ if (Form == DW_FORM_data4) return 4;
+ return DD.getTargetData()->getPointerSize();
}
//===----------------------------------------------------------------------===//
/// EmitValue - Emit label value.
///
-void DIEObjectLabel::EmitValue(const DwarfDebug &DD, unsigned Form) const {
- DD.EmitReference(Label);
+void DIEObjectLabel::EmitValue(DwarfDebug &DD, unsigned Form) {
+ bool IsSmall = Form == DW_FORM_data4;
+ DD.EmitReference(Label, false, IsSmall);
}
/// SizeOf - Determine size of label value in bytes.
///
unsigned DIEObjectLabel::SizeOf(const DwarfDebug &DD, unsigned Form) const {
- return DD.getTargetAsmInfo()->getAddressSize();
+ if (Form == DW_FORM_data4) return 4;
+ return DD.getTargetData()->getPointerSize();
+}
+
+//===----------------------------------------------------------------------===//
+
+/// EmitValue - Emit delta value.
+///
+void DIESectionOffset::EmitValue(DwarfDebug &DD, unsigned Form) {
+ bool IsSmall = Form == DW_FORM_data4;
+ DD.EmitSectionOffset(Label.Tag, Section.Tag,
+ Label.Number, Section.Number, IsSmall, IsEH, UseSet);
+}
+
+/// SizeOf - Determine size of delta value in bytes.
+///
+unsigned DIESectionOffset::SizeOf(const DwarfDebug &DD, unsigned Form) const {
+ if (Form == DW_FORM_data4) return 4;
+ return DD.getTargetData()->getPointerSize();
}
-
+
//===----------------------------------------------------------------------===//
/// EmitValue - Emit delta value.
///
-void DIEDelta::EmitValue(const DwarfDebug &DD, unsigned Form) const {
+void DIEDelta::EmitValue(DwarfDebug &DD, unsigned Form) {
bool IsSmall = Form == DW_FORM_data4;
DD.EmitDifference(LabelHi, LabelLo, IsSmall);
}
///
unsigned DIEDelta::SizeOf(const DwarfDebug &DD, unsigned Form) const {
if (Form == DW_FORM_data4) return 4;
- return DD.getTargetAsmInfo()->getAddressSize();
+ return DD.getTargetData()->getPointerSize();
}
//===----------------------------------------------------------------------===//
/// EmitValue - Emit debug information entry offset.
///
-void DIEntry::EmitValue(const DwarfDebug &DD, unsigned Form) const {
+void DIEntry::EmitValue(DwarfDebug &DD, unsigned Form) {
DD.getAsm()->EmitInt32(Entry->getOffset());
}
-
+
//===----------------------------------------------------------------------===//
/// ComputeSize - calculate the size of the block.
///
unsigned DIEBlock::ComputeSize(DwarfDebug &DD) {
if (!Size) {
- const std::vector<DIEAbbrevData> &AbbrevData = Abbrev.getData();
-
+ const SmallVector<DIEAbbrevData, 8> &AbbrevData = Abbrev.getData();
+
for (unsigned i = 0, N = Values.size(); i < N; ++i) {
Size += Values[i]->SizeOf(DD, AbbrevData[i].getForm());
}
/// EmitValue - Emit block data.
///
-void DIEBlock::EmitValue(const DwarfDebug &DD, unsigned Form) const {
+void DIEBlock::EmitValue(DwarfDebug &DD, unsigned Form) {
switch (Form) {
case DW_FORM_block1: DD.getAsm()->EmitInt8(Size); break;
case DW_FORM_block2: DD.getAsm()->EmitInt16(Size); break;
case DW_FORM_block: DD.getAsm()->EmitULEB128Bytes(Size); break;
default: assert(0 && "Improper form for block"); break;
}
-
- const std::vector<DIEAbbrevData> &AbbrevData = Abbrev.getData();
+
+ const SmallVector<DIEAbbrevData, 8> &AbbrevData = Abbrev.getData();
for (unsigned i = 0, N = Values.size(); i < N; ++i) {
- DD.getAsm()->EOL("");
+ DD.getAsm()->EOL();
Values[i]->EmitValue(DD, AbbrevData[i].getForm());
}
}
case DW_FORM_block1: return Size + sizeof(int8_t);
case DW_FORM_block2: return Size + sizeof(int16_t);
case DW_FORM_block4: return Size + sizeof(int32_t);
- case DW_FORM_block: return Size + DD.getAsm()->SizeULEB128(Size);
+ case DW_FORM_block: return Size + TargetAsmInfo::getULEB128Size(Size);
default: assert(0 && "Improper form for block"); break;
}
return 0;
for (unsigned i = 0, N = Children.size(); i < N; ++i)
delete Children[i];
}
-
+
/// AddSiblingOffset - Add a sibling offset field to the front of the DIE.
///
void DIE::AddSiblingOffset() {
///
void DIE::Profile(FoldingSetNodeID &ID) {
Abbrev.Profile(ID);
-
+
for (unsigned i = 0, N = Children.size(); i < N; ++i)
ID.AddPointer(Children[i]);
IndentCount += IncIndent;
const std::string Indent(IndentCount, ' ');
bool isBlock = Abbrev.getTag() == 0;
-
+
if (!isBlock) {
O << Indent
<< "Die: "
<< "0x" << std::hex << (intptr_t)this << std::dec
<< ", Offset: " << Offset
<< ", Size: " << Size
- << "\n";
-
+ << "\n";
+
O << Indent
<< TagString(Abbrev.getTag())
<< " "
}
O << "\n";
- const std::vector<DIEAbbrevData> &Data = Abbrev.getData();
-
+ const SmallVector<DIEAbbrevData, 8> &Data = Abbrev.getData();
+
IndentCount += 2;
for (unsigned i = 0, N = Data.size(); i < N; ++i) {
O << Indent;
- if (!isBlock) {
+
+ if (!isBlock)
O << AttributeString(Data[i].getAttribute());
- } else {
+ else
O << "Blk[" << i << "]";
- }
+
O << " "
<< FormEncodingString(Data[i].getForm())
<< " ";
for (unsigned j = 0, M = Children.size(); j < M; ++j) {
Children[j]->print(O, 4);
}
-
+
if (!isBlock) O << "\n";
IndentCount -= IncIndent;
}
/// SetModuleInfo - Set machine module info when it's known that pass manager
/// has created it. Set by the target AsmPrinter.
void DwarfWriter::SetModuleInfo(MachineModuleInfo *MMI) {
- DE->SetModuleInfo(MMI);
DD->SetModuleInfo(MMI);
+ DE->SetModuleInfo(MMI);
}
/// BeginModule - Emit all Dwarf sections that should come prior to the
DD->EndModule();
}
-/// BeginFunction - Gather pre-function debug information. Assumes being
+/// BeginFunction - Gather pre-function debug information. Assumes being
/// emitted immediately after the function entry point.
void DwarfWriter::BeginFunction(MachineFunction *MF) {
DE->BeginFunction(MF);
/// EndFunction - Gather and emit post-function debug information.
///
void DwarfWriter::EndFunction() {
- DD->PreExceptionEndFunction();
- DE->EndFunction();
DD->EndFunction();
+ DE->EndFunction();
+
+ if (MachineModuleInfo *MMI = DD->getMMI() ? DD->getMMI() : DE->getMMI())
+ // Clear function debug information.
+ MMI->EndFunction();
}
projects / oota-llvm.git / blobdiff