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Generate local variable and scope information and equivalent dwarf forms.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26989 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jim Laskey 2006-03-23 18:07:55 +00:00
parent 43970fec32
commit b8509c5752
5 changed files with 660 additions and 114 deletions
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49
include/llvm/CodeGen/DwarfWriter.h
View File

@ -35,6 +35,8 @@ class AsmPrinter;
class CompileUnit;
class CompileUnitDesc;
class DebugInfoDesc;
class DebugVariable;
class DebugScope;
class DIE;
class DIEAbbrev;
class GlobalVariableDesc;
@ -78,6 +80,14 @@ protected:
///
AsmPrinter *Asm;
/// M - Current module.
///
Module *M;
/// MF - Current machine function.
///
MachineFunction *MF;
/// DebugInfo - Collected debug information.
///
MachineDebugInfo *DebugInfo;
@ -86,6 +96,10 @@ protected:
///
bool didInitial;
/// SubprogramCount - The running count of functions being compiled.
///
unsigned SubprogramCount;
//===--------------------------------------------------------------------===//
// Attributes used to construct specific Dwarf sections.
//
@ -209,6 +223,10 @@ public:
/// EOL - Print a newline character to asm stream. If a comment is present
/// then it will be printed first. Comments should not contain '\n'.
void EOL(const std::string &Comment) const;
/// EmitAlign - Print a align directive.
///
void EmitAlign(unsigned Alignment) const;
/// EmitULEB128Bytes - Emit an assembler byte data directive to compose an
/// unsigned leb128 value.
@ -300,6 +318,10 @@ public:
private:
/// AddSourceLine - Add location information to specified debug information
/// entry.
void AddSourceLine(DIE *Die, CompileUnitDesc *File, unsigned Line);
/// NewType - Create a new type DIE.
///
DIE *NewType(DIE *Context, TypeDesc *TyDesc);
@ -320,6 +342,19 @@ private:
///
DIE *NewSubprogram(SubprogramDesc *SPD);
/// NewScopeVariable - Create a new scope variable.
///
DIE *NewScopeVariable(DebugVariable *DV, CompileUnit *Unit);
/// ConstructScope - Construct the components of a scope.
///
void ConstructScope(DebugScope *ParentScope, DIE *ParentDie,
CompileUnit *Unit);
/// ConstructRootScope - Construct the scope for the subprogram.
///
void ConstructRootScope(DebugScope *RootScope);
/// EmitInitial - Emit initial Dwarf declarations.
///
void EmitInitial() const;
@ -330,7 +365,7 @@ private:
/// SizeAndOffsetDie - Compute the size and offset of a DIE.
///
unsigned SizeAndOffsetDie(DIE *Die, unsigned Offset);
unsigned SizeAndOffsetDie(DIE *Die, unsigned Offset, bool Last);
/// SizeAndOffsets - Compute the size and offset of all the DIEs.
///
@ -382,11 +417,11 @@ private:
/// ConstructGlobalDIEs - Create DIEs for each of the externally visible
/// global variables.
void ConstructGlobalDIEs(Module &M);
void ConstructGlobalDIEs();
/// ConstructSubprogramDIEs - Create DIEs for each of the externally visible
/// subprograms.
void ConstructSubprogramDIEs(Module &M);
void ConstructSubprogramDIEs();
/// ShouldEmitDwarf - Returns true if Dwarf declarations should be made.
/// When called it also checks to see if debug info is newly available. if
@ -408,19 +443,19 @@ public:
/// BeginModule - Emit all Dwarf sections that should come prior to the
/// content.
void BeginModule(Module &M);
void BeginModule(Module *M);
/// EndModule - Emit all Dwarf sections that should come after the content.
///
void EndModule(Module &M);
void EndModule();
/// BeginFunction - Gather pre-function debug information.
///
void BeginFunction(MachineFunction &MF);
void BeginFunction(MachineFunction *MF);
/// EndFunction - Gather and emit post-function debug information.
///
void EndFunction(MachineFunction &MF);
void EndFunction();
};
} // end llvm namespace

200
include/llvm/CodeGen/MachineDebugInfo.h
View File

@ -55,7 +55,7 @@ class StructType;
// Debug info constants.
enum {
LLVMDebugVersion = 2 // Current version of debug information.
LLVMDebugVersion = 3 // Current version of debug information.
};
//===----------------------------------------------------------------------===//
@ -299,7 +299,7 @@ public:
void setAlign(uint64_t A) { Align = A; }
void setOffset(uint64_t O) { Offset = O; }
/// ApplyToFields - Target the visitor to the fields of the TypeDesc.
/// ApplyToFields - Target the visitor to the fields of the TypeDesc.
///
virtual void ApplyToFields(DIVisitor *Visitor);
@ -334,7 +334,7 @@ public:
static bool classof(const BasicTypeDesc *) { return true; }
static bool classof(const DebugInfoDesc *D);
/// ApplyToFields - Target the visitor to the fields of the BasicTypeDesc.
/// ApplyToFields - Target the visitor to the fields of the BasicTypeDesc.
///
virtual void ApplyToFields(DIVisitor *Visitor);
@ -370,7 +370,7 @@ public:
static bool classof(const DerivedTypeDesc *) { return true; }
static bool classof(const DebugInfoDesc *D);
/// ApplyToFields - Target the visitor to the fields of the DerivedTypeDesc.
/// ApplyToFields - Target the visitor to the fields of the DerivedTypeDesc.
///
virtual void ApplyToFields(DIVisitor *Visitor);
@ -497,6 +497,54 @@ public:
#endif
};
//===----------------------------------------------------------------------===//
/// VariableDesc - This class packages debug information associated with a
/// subprogram variable.
///
class VariableDesc : public DebugInfoDesc {
private:
DebugInfoDesc *Context; // Context debug descriptor.
std::string Name; // Type name (may be empty.)
CompileUnitDesc *File; // Defined compile unit (may be NULL.)
unsigned Line; // Defined line# (may be zero.)
TypeDesc *TyDesc; // Type of variable.
public:
VariableDesc(unsigned T);
// Accessors
DebugInfoDesc *getContext() const { return Context; }
const std::string &getName() const { return Name; }
CompileUnitDesc *getFile() const { return File; }
unsigned getLine() const { return Line; }
TypeDesc *getType() const { return TyDesc; }
void setContext(DebugInfoDesc *C) { Context = C; }
void setName(const std::string &N) { Name = N; }
void setFile(CompileUnitDesc *U) { File = U; }
void setLine(unsigned L) { Line = L; }
void setType(TypeDesc *T) { TyDesc = T; }
// Implement isa/cast/dyncast.
static bool classof(const VariableDesc *) { return true; }
static bool classof(const DebugInfoDesc *D);
/// ApplyToFields - Target the visitor to the fields of the VariableDesc.
///
virtual void ApplyToFields(DIVisitor *Visitor);
/// getDescString - Return a string used to compose global names and labels.
///
virtual const char *getDescString() const;
/// getTypeString - Return a string used to label this descriptor's type.
///
virtual const char *getTypeString() const;
#ifndef NDEBUG
virtual void dump();
#endif
};
//===----------------------------------------------------------------------===//
/// GlobalDesc - This class is the base descriptor for global functions and
/// variables.
@ -519,7 +567,7 @@ public:
const std::string &getName() const { return Name; }
CompileUnitDesc *getFile() const { return File; }
unsigned getLine() const { return Line; }
TypeDesc *getTypeDesc() const { return TyDesc; }
TypeDesc *getType() const { return TyDesc; }
bool isStatic() const { return IsStatic; }
bool isDefinition() const { return IsDefinition; }
void setContext(DebugInfoDesc *C) { Context = C; }
@ -580,14 +628,11 @@ public:
/// subprogram/function.
class SubprogramDesc : public GlobalDesc {
private:
std::vector<DebugInfoDesc *> Elements;// Information about args, variables
// and blocks.
public:
SubprogramDesc();
// Accessors
std::vector<DebugInfoDesc *> &getElements() { return Elements; }
// Implement isa/cast/dyncast.
static bool classof(const SubprogramDesc *) { return true; }
@ -620,13 +665,14 @@ public:
///
class BlockDesc : public DebugInfoDesc {
private:
std::vector<DebugInfoDesc *> Elements;// Information about nested variables
// and blocks.
DebugInfoDesc *Context; // Context debug descriptor.
public:
BlockDesc();
// Accessors
std::vector<DebugInfoDesc *> &getElements() { return Elements; }
DebugInfoDesc *getContext() const { return Context; }
void setContext(DebugInfoDesc *C) { Context = C; }
// Implement isa/cast/dyncast.
static bool classof(const BlockDesc *) { return true; }
@ -753,15 +799,17 @@ private:
unsigned Line; // Source line number.
unsigned Column; // Source column.
unsigned SourceID; // Source ID number.
unsigned LabelID; // Label in code ID number.
public:
SourceLineInfo(unsigned L, unsigned C, unsigned S)
: Line(L), Column(C), SourceID(S) {}
SourceLineInfo(unsigned L, unsigned C, unsigned S, unsigned I)
: Line(L), Column(C), SourceID(S), LabelID(I) {}
// Accessors
unsigned getLine() const { return Line; }
unsigned getColumn() const { return Column; }
unsigned getSourceID() const { return SourceID; }
unsigned getLabelID() const { return LabelID; }
};
//===----------------------------------------------------------------------===//
@ -793,6 +841,68 @@ public:
}
};
//===----------------------------------------------------------------------===//
/// DebugVariable - This class is used to track local variable information.
///
class DebugVariable {
private:
VariableDesc *Desc; // Variable Descriptor.
unsigned FrameIndex; // Variable frame index.
public:
DebugVariable(VariableDesc *D, unsigned I)
: Desc(D)
, FrameIndex(I)
{}
// Accessors.
VariableDesc *getDesc() const { return Desc; }
unsigned getFrameIndex() const { return FrameIndex; }
};
//===----------------------------------------------------------------------===//
/// DebugScope - This class is used to track scope information.
///
class DebugScope {
private:
DebugScope *Parent; // Parent to this scope.
DebugInfoDesc *Desc; // Debug info descriptor for scope.
// Either subprogram or block.
unsigned StartLabelID; // Label ID of the beginning of scope.
unsigned EndLabelID; // Label ID of the end of scope.
std::vector<DebugScope *> Scopes; // Scopes defined in scope.
std::vector<DebugVariable *> Variables;// Variables declared in scope.
public:
DebugScope(DebugScope *P, DebugInfoDesc *D)
: Parent(P)
, Desc(D)
, StartLabelID(0)
, EndLabelID(0)
, Scopes()
, Variables()
{}
~DebugScope();
// Accessors.
DebugScope *getParent() const { return Parent; }
DebugInfoDesc *getDesc() const { return Desc; }
unsigned getStartLabelID() const { return StartLabelID; }
unsigned getEndLabelID() const { return EndLabelID; }
std::vector<DebugScope *> &getScopes() { return Scopes; }
std::vector<DebugVariable *> &getVariables() { return Variables; }
void setStartLabelID(unsigned S) { StartLabelID = S; }
void setEndLabelID(unsigned E) { EndLabelID = E; }
/// AddScope - Add a scope to the scope.
///
void AddScope(DebugScope *S) { Scopes.push_back(S); }
/// AddVariable - Add a variable to the scope.
///
void AddVariable(DebugVariable *V) { Variables.push_back(V); }
};
//===----------------------------------------------------------------------===//
/// MachineDebugInfo - This class contains debug information specific to a
/// module. Queries can be made by different debugging schemes and reformated
@ -800,8 +910,9 @@ public:
///
class MachineDebugInfo : public ImmutablePass {
private:
// Use the same serializer/deserializer/verifier for the module.
// Use the same deserializer/verifier for the module.
DIDeserializer DR;
DIVerifier VR;
// CompileUnits - Uniquing vector for compile units.
UniqueVector<CompileUnitDesc *> CompileUnits;
@ -814,6 +925,16 @@ private:
// Lines - List of of source line correspondence.
std::vector<SourceLineInfo *> Lines;
// LabelID - Current number assigned to unique label numbers.
unsigned LabelID;
// ScopeMap - Tracks the scopes in the current function.
std::map<DebugInfoDesc *, DebugScope *> ScopeMap;
// RootScope - Top level scope for the current function.
//
DebugScope *RootScope;
public:
MachineDebugInfo();
@ -844,25 +965,20 @@ public:
///
bool hasInfo() const { return !CompileUnits.empty(); }
/// NextLabelID - Return the next unique label id.
///
unsigned NextLabelID() { return ++LabelID; }
/// RecordLabel - Records location information and associates it with a
/// debug label. Returns a unique label ID used to generate a label and
/// provide correspondence to the source line list.
unsigned RecordLabel(unsigned Line, unsigned Column, unsigned Source) {
Lines.push_back(new SourceLineInfo(Line, Column, Source));
return Lines.size();
}
unsigned RecordLabel(unsigned Line, unsigned Column, unsigned Source);
/// RecordSource - Register a source file with debug info. Returns an source
/// ID.
unsigned RecordSource(const std::string &Directory,
const std::string &Source) {
unsigned DirectoryID = Directories.insert(Directory);
return SourceFiles.insert(SourceFileInfo(DirectoryID, Source));
}
unsigned RecordSource(const CompileUnitDesc *CompileUnit) {
return RecordSource(CompileUnit->getDirectory(),
CompileUnit->getFileName());
}
const std::string &Source);
unsigned RecordSource(const CompileUnitDesc *CompileUnit);
/// getDirectories - Return the UniqueVector of std::string representing
/// directories.
@ -904,8 +1020,14 @@ public:
std::vector<T *> AnchoredDescs;
for (unsigned i = 0, N = Globals.size(); i < N; ++i) {
GlobalVariable *GV = Globals[i];
// FIXME - Tag check only necessary for bring up (changed tag values.)
unsigned Tag = DebugInfoDesc::TagFromGlobal(GV);
if (isa<CompileUnitDesc>(&Desc)) {
unsigned DebugVersion = CompileUnitDesc::DebugVersionFromGlobal(GV);
// FIXME - In the short term, changes are too drastic to continue.
if (DebugVersion != LLVMDebugVersion) break;
}
if (Tag == Desc.getTag()) {
AnchoredDescs.push_back(cast<T>(DR.Deserialize(GV)));
}
@ -913,6 +1035,30 @@ public:
return AnchoredDescs;
}
/// RecordRegionStart - Indicate the start of a region.
///
unsigned RecordRegionStart(Value *V);
/// RecordRegionEnd - Indicate the end of a region.
///
unsigned RecordRegionEnd(Value *V);
/// RecordVariable - Indicate the declaration of a local variable.
///
void RecordVariable(Value *V, unsigned FrameIndex);
/// getRootScope - Return current functions root scope.
///
DebugScope *getRootScope() { return RootScope; }
/// getOrCreateScope - Returns the scope associated with the given descriptor.
///
DebugScope *getOrCreateScope(DebugInfoDesc *ScopeDesc);
/// ClearScopes - Delete the scope and variable info after a function is
/// completed.
void ClearScopes();
}; // End class MachineDebugInfo

12
include/llvm/Support/Dwarf.h
View File

@ -31,7 +31,16 @@ namespace dwarf {
enum llvm_dwarf_constants {
// llvm mock tags
DW_TAG_invalid = ~0U, // Tag for invalid results.
DW_TAG_anchor = 0 // Tag for descriptor anchors.
DW_TAG_anchor = 0, // Tag for descriptor anchors.
DW_TAG_auto_variable = 0x100, // Tag for local (auto) variables.
DW_TAG_arg_variable = 0x101, // Tag for argument variables.
DW_TAG_return_variable = 0x102, // Tag for return variables.
DW_TAG_user_base = 0x1000, // Recommended base for user tags.
DW_CIE_VERSION = 1, // Common frame information version.
DW_CIE_ID = 0xffffffff // Common frame information mark.
};
enum dwarf_constants {
@ -410,6 +419,7 @@ enum dwarf_constants {
DW_MACINFO_vendor_ext = 0xff,
// Call frame instruction encodings
DW_CFA_extended = 0x00,
DW_CFA_advance_loc = 0x40,
DW_CFA_offset = 0x80,
DW_CFA_restore = 0xc0,

324
lib/CodeGen/DwarfWriter.cpp
View File

@ -18,9 +18,11 @@
#include "llvm/Type.h"
#include "llvm/CodeGen/AsmPrinter.h"
#include "llvm/CodeGen/MachineDebugInfo.h"
#include "llvm/CodeGen/MachineLocation.h"
#include "llvm/Support/Dwarf.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Mangler.h"
#include "llvm/Target/MRegisterInfo.h"
#include "llvm/Target/TargetMachine.h"
#include <iostream>
@ -47,7 +49,7 @@ class CompileUnit {
private:
CompileUnitDesc *Desc; // Compile unit debug descriptor.
unsigned ID; // File ID for source.
DIE *Die; // Compile unit die.
DIE *Die; // Compile unit debug information entry.
std::map<std::string, DIE *> Globals; // A map of globally visible named
// entities for this unit.
@ -153,6 +155,12 @@ public:
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));
}
/// Emit - Print the abbreviation using the specified Dwarf writer.
///
void Emit(const DwarfWriter &DW) const;
@ -321,11 +329,11 @@ struct DIEntry : public DIEValue {
static bool classof(const DIEntry *) { return true; }
static bool classof(const DIEValue *E) { return E->Type == isEntry; }
/// EmitValue - Emit die entry offset.
/// EmitValue - Emit debug information entry offset.
///
virtual void EmitValue(const DwarfWriter &DW, unsigned Form) const;
/// SizeOf - Determine size of die entry in bytes.
/// SizeOf - Determine size of debug information entry in bytes.
///
virtual unsigned SizeOf(const DwarfWriter &DW, unsigned Form) const;
};
@ -424,6 +432,10 @@ public:
/// 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();
/// AddUInt - Add an unsigned integer attribute data and value.
///
@ -591,9 +603,13 @@ unsigned DIEInteger::BestForm(bool IsSigned) {
void DIEInteger::EmitValue(const DwarfWriter &DW, unsigned Form) const {
switch (Form) {
case DW_FORM_flag: // Fall thru
case DW_FORM_ref1: // Fall thru
case DW_FORM_data1: DW.EmitInt8(Integer); break;
case DW_FORM_ref2: // Fall thru
case DW_FORM_data2: DW.EmitInt16(Integer); break;
case DW_FORM_ref4: // Fall thru
case DW_FORM_data4: DW.EmitInt32(Integer); break;
case DW_FORM_ref8: // Fall thru
case DW_FORM_data8: DW.EmitInt64(Integer); break;
case DW_FORM_udata: DW.EmitULEB128Bytes(Integer); break;
case DW_FORM_sdata: DW.EmitSLEB128Bytes(Integer); break;
@ -606,9 +622,13 @@ void DIEInteger::EmitValue(const DwarfWriter &DW, unsigned Form) const {
unsigned DIEInteger::SizeOf(const DwarfWriter &DW, unsigned Form) const {
switch (Form) {
case DW_FORM_flag: // Fall thru
case DW_FORM_ref1: // Fall thru
case DW_FORM_data1: return sizeof(int8_t);
case DW_FORM_ref2: // Fall thru
case DW_FORM_data2: return sizeof(int16_t);
case DW_FORM_ref4: // Fall thru
case DW_FORM_data4: return sizeof(int32_t);
case DW_FORM_ref8: // Fall thru
case DW_FORM_data8: return sizeof(int64_t);
case DW_FORM_udata: return DW.SizeULEB128(Integer);
case DW_FORM_sdata: return DW.SizeSLEB128(Integer);
@ -674,13 +694,13 @@ unsigned DIEDelta::SizeOf(const DwarfWriter &DW, unsigned Form) const {
}
//===----------------------------------------------------------------------===//
/// EmitValue - Emit die entry offset.
/// EmitValue - Emit debug information entry offset.
///
void DIEntry::EmitValue(const DwarfWriter &DW, unsigned Form) const {
DW.EmitInt32(Entry->getOffset());
}
/// SizeOf - Determine size of die value in bytes.
/// SizeOf - Determine size of debug information entry value in bytes.
///
unsigned DIEntry::SizeOf(const DwarfWriter &DW, unsigned Form) const {
return sizeof(int32_t);
@ -818,6 +838,14 @@ DIE::~DIE() {
}
}
/// AddSiblingOffset - Add a sibling offset field to the front of the DIE.
///
void DIE::AddSiblingOffset() {
DIEInteger *DI = new DIEInteger(0);
Values.insert(Values.begin(), DI);
Abbrev->AddFirstAttribute(DW_AT_sibling, DW_FORM_ref4);
}
/// AddUInt - Add an unsigned integer attribute data and value.
///
void DIE::AddUInt(unsigned Attribute, unsigned Form, uint64_t Integer) {
@ -924,6 +952,12 @@ void DwarfWriter::EOL(const std::string &Comment) const {
O << "\n";
}
/// EmitAlign - Print a align directive.
///
void DwarfWriter::EmitAlign(unsigned Alignment) const {
O << Asm->AlignDirective << Alignment << "\n";
}
/// EmitULEB128Bytes - Emit an assembler byte data directive to compose an
/// unsigned leb128 value.
void DwarfWriter::EmitULEB128Bytes(unsigned Value) const {
@ -1159,6 +1193,18 @@ DWLabel DwarfWriter::NewString(const std::string &String) {
return DWLabel("string", StringID);
}
/// AddSourceLine - Add location information to specified debug information
/// entry.
void DwarfWriter::AddSourceLine(DIE *Die, CompileUnitDesc *File, unsigned Line) {
if (File && Line) {
CompileUnit *FileUnit = FindCompileUnit(File);
unsigned FileID = FileUnit->getID();
Die->AddUInt(DW_AT_decl_file, 0, FileID);
Die->AddUInt(DW_AT_decl_line, 0, Line);
}
}
/// NewBasicType - Creates a new basic type if necessary, then adds to the
/// owner.
/// FIXME - Should never be needed.
@ -1320,24 +1366,18 @@ DIE *DwarfWriter::NewType(DIE *Context, TypeDesc *TyDesc) {
// Extract the basic information.
const std::string &Name = MemberDesc->getName();
unsigned Line = MemberDesc->getLine();
TypeDesc *MemTy = MemberDesc->getFromType();
uint64_t Size = MemberDesc->getSize();
uint64_t Align = MemberDesc->getAlign();
uint64_t Offset = MemberDesc->getOffset();
// Construct member die.
// Construct member debug information entry.
DIE *Member = new DIE(DW_TAG_member);
// Add details.
// Add name if not "".
if (!Name.empty()) Member->AddString(DW_AT_name, DW_FORM_string, Name);
if (CompileUnitDesc *File = MemberDesc->getFile()) {
CompileUnit *FileUnit = FindCompileUnit(File);
unsigned FileID = FileUnit->getID();
int Line = MemberDesc->getLine();
Member->AddUInt(DW_AT_decl_file, 0, FileID);
Member->AddUInt(DW_AT_decl_line, 0, Line);
}
// 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;
@ -1406,14 +1446,8 @@ DIE *DwarfWriter::NewType(DIE *Context, TypeDesc *TyDesc) {
if (Size) Ty->AddUInt(DW_AT_byte_size, 0, Size);
// Add name if not anonymous or intermediate type.
if (!Name.empty()) Ty->AddString(DW_AT_name, DW_FORM_string, Name);
// Add source line info if present.
if (CompileUnitDesc *File = TyDesc->getFile()) {
CompileUnit *FileUnit = FindCompileUnit(File);
unsigned FileID = FileUnit->getID();
int Line = TyDesc->getLine();
Ty->AddUInt(DW_AT_decl_file, 0, FileID);
Ty->AddUInt(DW_AT_decl_line, 0, Line);
}
// Add source line info if available.
AddSourceLine(Ty, TyDesc->getFile(), TyDesc->getLine());
// Add to context owner.
Context->AddChild(Ty);
@ -1421,7 +1455,7 @@ DIE *DwarfWriter::NewType(DIE *Context, TypeDesc *TyDesc) {
return Slot;
}
/// NewCompileUnit - Create new compile unit and it's die.
/// NewCompileUnit - Create new compile unit and it's debug information entry.
///
CompileUnit *DwarfWriter::NewCompileUnit(CompileUnitDesc *UnitDesc,
unsigned ID) {
@ -1435,7 +1469,7 @@ CompileUnit *DwarfWriter::NewCompileUnit(CompileUnitDesc *UnitDesc,
Die->AddString(DW_AT_name, DW_FORM_string, UnitDesc->getFileName());
Die->AddString(DW_AT_comp_dir, DW_FORM_string, UnitDesc->getDirectory());
// Add die to descriptor map.
// Add debug information entry to descriptor map.
DescToDieMap[UnitDesc] = Die;
// Construct compile unit.
@ -1472,20 +1506,20 @@ DIE *DwarfWriter::NewGlobalVariable(GlobalVariableDesc *GVD) {
// Gather the details (simplify add attribute code.)
const std::string &Name = GVD->getName();
unsigned FileID = Unit->getID();
unsigned Line = GVD->getLine();
// Get the global's type.
DIE *Type = NewType(Unit->getDie(), GVD->getTypeDesc());
DIE *Type = NewType(Unit->getDie(), GVD->getType());
// Create the globale variable DIE.
DIE *VariableDie = new DIE(DW_TAG_variable);
VariableDie->AddString (DW_AT_name, DW_FORM_string, Name);
VariableDie->AddUInt (DW_AT_decl_file, 0, FileID);
VariableDie->AddUInt (DW_AT_decl_line, 0, Line);
VariableDie->AddDIEntry (DW_AT_type, DW_FORM_ref4, Type);
VariableDie->AddUInt (DW_AT_external, DW_FORM_flag, 1);
// Add source line info if available.
AddSourceLine(VariableDie, UnitDesc, GVD->getLine());
// Add address.
DIEBlock *Block = new DIEBlock();
Block->AddUInt(DW_FORM_data1, DW_OP_addr);
Block->AddObjectLabel(DW_FORM_udata, MangledName);
@ -1518,20 +1552,17 @@ DIE *DwarfWriter::NewSubprogram(SubprogramDesc *SPD) {
// Gather the details (simplify add attribute code.)
const std::string &Name = SPD->getName();
CompileUnitDesc *FileDesc = static_cast<CompileUnitDesc *>(SPD->getFile());
CompileUnit *File = FindCompileUnit(FileDesc);
unsigned FileID = File->getID();
DIE *Type = NewBasicType(Unit->getDie(), Type::IntTy);
unsigned Line = SPD->getLine();
unsigned IsExternal = SPD->isStatic() ? 0 : 1;
DIE *SubprogramDie = new DIE(DW_TAG_subprogram);
SubprogramDie->AddString (DW_AT_name, DW_FORM_string, Name);
SubprogramDie->AddUInt (DW_AT_decl_file, 0, FileID);
SubprogramDie->AddUInt (DW_AT_decl_line, 0, Line);
SubprogramDie->AddDIEntry (DW_AT_type, DW_FORM_ref4, Type);
SubprogramDie->AddUInt (DW_AT_external, DW_FORM_flag, IsExternal);
// Add source line info if available.
AddSourceLine(SubprogramDie, UnitDesc, SPD->getLine());
// Add to map.
Slot = SubprogramDie;
@ -1544,6 +1575,119 @@ DIE *DwarfWriter::NewSubprogram(SubprogramDesc *SPD) {
return SubprogramDie;
}
/// NewScopeVariable - Create a new scope variable.
///
DIE *DwarfWriter::NewScopeVariable(DebugVariable *DV, CompileUnit *Unit) {
// Get the descriptor.
VariableDesc *VD = DV->getDesc();
// Translate tag to proper Dwarf tag. The result variable is dropped for now.
unsigned Tag;
switch (VD->getTag()) {
case DW_TAG_return_variable: return NULL;
case DW_TAG_arg_variable: Tag = DW_TAG_formal_parameter; break;
case DW_TAG_auto_variable: // fall thru
default: Tag = DW_TAG_variable; break;
}
// Define variable debug information entry.
DIE *VariableDie = new DIE(Tag);
VariableDie->AddString(DW_AT_name, DW_FORM_string, VD->getName());
// Add source line info if available.
AddSourceLine(VariableDie, VD->getFile(), VD->getLine());
// Add variable type.
DIE *Type = NewType(Unit->getDie(), VD->getType());
VariableDie->AddDIEntry(DW_AT_type, DW_FORM_ref4, Type);
// Get variable address.
MachineLocation Location;
Asm->TM.getRegisterInfo()->getLocation(*MF, DV->getFrameIndex(), Location);
// Add computation for variable.
DIEBlock *Block = new DIEBlock();
if (Location.isRegister()) {
// FIXME - This is a real hack.
Block->AddUInt(DW_FORM_data1, DW_OP_reg0 + Location.getRegister());
} else {
// FIXME - This is a real hack.
Block->AddUInt(DW_FORM_data1, DW_OP_breg0 + Location.getRegister());
Block->AddUInt(DW_FORM_sdata, Location.getOffset());
}
Block->ComputeSize(*this);
VariableDie->AddBlock(DW_AT_location, 0, Block);
return VariableDie;
}
/// ConstructScope - Construct the components of a scope.
///
void DwarfWriter::ConstructScope(DebugScope *ParentScope,
DIE *ParentDie, CompileUnit *Unit) {
// Add variables to scope.
std::vector<DebugVariable *> &Variables = ParentScope->getVariables();
for (unsigned i = 0, N = Variables.size(); i < N; ++i) {
DIE *VariableDie = NewScopeVariable(Variables[i], Unit);
if (VariableDie) ParentDie->AddChild(VariableDie);
}
// Add nested scopes.
std::vector<DebugScope *> &Scopes = ParentScope->getScopes();
for (unsigned j = 0, M = Scopes.size(); j < M; ++j) {
// Define the Scope debug information entry.
DebugScope *Scope = Scopes[j];
// FIXME - Ignore inlined functions for the time being.
if (Scope->getParent()) continue;
DIE *ScopeDie = new DIE(DW_TAG_lexical_block);
// Add the scope bounds.
if (unsigned StartID = Scope->getStartLabelID()) {
ScopeDie->AddLabel(DW_AT_low_pc, DW_FORM_addr,
DWLabel("loc", StartID));
} else {
ScopeDie->AddLabel(DW_AT_low_pc, DW_FORM_addr,
DWLabel("func_begin", SubprogramCount));
}
if (unsigned EndID = Scope->getEndLabelID()) {
ScopeDie->AddLabel(DW_AT_high_pc, DW_FORM_addr,
DWLabel("loc", EndID));
} else {
ScopeDie->AddLabel(DW_AT_high_pc, DW_FORM_addr,
DWLabel("func_end", SubprogramCount));
}
// Add the scope contents.
ConstructScope(Scope, ScopeDie, Unit);
ParentDie->AddChild(ScopeDie);
}
}
/// ConstructRootScope - Construct the scope for the subprogram.
///
void DwarfWriter::ConstructRootScope(DebugScope *RootScope) {
// Exit if there is no root scope.
if (!RootScope) return;
// Get the subprogram debug information entry.
SubprogramDesc *SPD = cast<SubprogramDesc>(RootScope->getDesc());
DIE *SPDie = DescToDieMap[SPD];
assert(SPDie && "Missing subprogram descriptor");
// Add the function bounds.
SPDie->AddLabel(DW_AT_low_pc, DW_FORM_addr,
DWLabel("func_begin", SubprogramCount));
SPDie->AddLabel(DW_AT_high_pc, DW_FORM_addr,
DWLabel("func_end", SubprogramCount));
CompileUnitDesc *UnitDesc = static_cast<CompileUnitDesc *>(SPD->getContext());
CompileUnit *Unit = FindCompileUnit(UnitDesc);
ConstructScope(RootScope, SPDie, Unit);
}
/// EmitInitial - Emit initial Dwarf declarations. This is necessary for cc
/// tools to recognize the object file contains Dwarf information.
///
@ -1625,8 +1769,6 @@ void DwarfWriter::EmitDIE(DIE *Die) const {
const std::vector<DIE *> &Children = Die->getChildren();
for (unsigned j = 0, M = Children.size(); j < M; ++j) {
// FIXME - handle sibling offsets.
// FIXME - handle all DIE types.
EmitDIE(Children[j]);
}
@ -1636,7 +1778,13 @@ void DwarfWriter::EmitDIE(DIE *Die) const {
/// SizeAndOffsetDie - Compute the size and offset of a DIE.
///
unsigned DwarfWriter::SizeAndOffsetDie(DIE *Die, unsigned Offset) {
unsigned DwarfWriter::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.
Die->Complete(*this);
@ -1660,13 +1808,12 @@ unsigned DwarfWriter::SizeAndOffsetDie(DIE *Die, unsigned Offset) {
}
// Emit the DIE children if any.
if (Abbrev.getChildrenFlag() == DW_CHILDREN_yes) {
const std::vector<DIE *> &Children = Die->getChildren();
if (!Children.empty()) {
assert(Abbrev.getChildrenFlag() == DW_CHILDREN_yes &&
"Children flag not set");
for (unsigned j = 0, M = Children.size(); j < M; ++j) {
// FIXME - handle sibling offsets.
// FIXME - handle all DIE types.
Offset = SizeAndOffsetDie(Children[j], Offset);
Offset = SizeAndOffsetDie(Children[j], Offset, (j + 1) == M);
}
// End of children marker.
@ -1690,8 +1837,7 @@ void DwarfWriter::SizeAndOffsets() {
sizeof(int16_t) + // DWARF version number
sizeof(int32_t) + // Offset Into Abbrev. Section
sizeof(int8_t); // Pointer Size (in bytes)
SizeAndOffsetDie(Unit->getDie(), Offset);
SizeAndOffsetDie(Unit->getDie(), Offset, (i + 1) == N);
}
}
}
@ -1853,7 +1999,7 @@ void DwarfWriter::EmitDebugLines() const {
EmitInt8(0); EOL("Extended Op");
EmitInt8(4 + 1); EOL("Op size");
EmitInt8(DW_LNE_set_address); EOL("DW_LNE_set_address");
EmitReference("loc", i + 1); EOL("Location label");
EmitReference("loc", LineInfo->getLabelID()); EOL("Location label");
// If change of source, then switch to the new source.
if (Source != LineInfo->getSourceID()) {
@ -1906,7 +2052,30 @@ void DwarfWriter::EmitDebugLines() const {
/// EmitDebugFrame - Emit visible names into a debug frame section.
///
void DwarfWriter::EmitDebugFrame() {
// FIXME - Should be per frame
// Start the dwarf pubnames section.
Asm->SwitchSection(DwarfFrameSection, 0);
EmitDifference("frame_common_end", 0,
"frame_common_begin", 0);
EOL("Length of Common Information Entry");
EmitLabel("frame_common_begin", 0);
EmitInt32(DW_CIE_ID); EOL("CIE Identifier Tag");
EmitInt8(DW_CIE_VERSION); EOL("CIE Version");
EmitString(""); EOL("CIE Augmentation");
EmitULEB128Bytes(1); EOL("CIE Code Alignment Factor");
// FIXME - needs to change based on stack direction.
EmitSLEB128Bytes(-sizeof(int32_t)); EOL("CIE Data Alignment Factor");
// FIXME - hard coded for PPC (LR).
EmitInt8(0x41); EOL("CIE RA Column Hardcoded (PPC LR)");
// FIXME - hard coded for PPC 0(SP).
EmitULEB128Bytes(DW_CFA_def_cfa); EOL("DW_CFA_def_cfa");
EmitULEB128Bytes(1); EOL("PPC Register SP");
EmitULEB128Bytes(0); EOL("PPC offset 0 as in 0(SP)");
EmitAlign(2);
EmitLabel("frame_common_end", 0);
O << "\n";
}
/// EmitDebugPubNames - Emit visible names into a debug pubnames section.
@ -1962,7 +2131,7 @@ void DwarfWriter::EmitDebugStr() {
// Start the dwarf str section.
Asm->SwitchSection(DwarfStrSection, 0);
// For each of strings in teh string pool.
// For each of strings in the string pool.
for (unsigned StringID = 1, N = StringPool.size();
StringID <= N; ++StringID) {
// Emit a label for reference from debug information entries.
@ -2057,9 +2226,9 @@ void DwarfWriter::ConstructCompileUnitDIEs() {
/// ConstructGlobalDIEs - Create DIEs for each of the externally visible global
/// variables.
void DwarfWriter::ConstructGlobalDIEs(Module &M) {
void DwarfWriter::ConstructGlobalDIEs() {
std::vector<GlobalVariableDesc *> GlobalVariables =
DebugInfo->getAnchoredDescriptors<GlobalVariableDesc>(M);
DebugInfo->getAnchoredDescriptors<GlobalVariableDesc>(*M);
for (unsigned i = 0, N = GlobalVariables.size(); i < N; ++i) {
GlobalVariableDesc *GVD = GlobalVariables[i];
@ -2069,9 +2238,9 @@ void DwarfWriter::ConstructGlobalDIEs(Module &M) {
/// ConstructSubprogramDIEs - Create DIEs for each of the externally visible
/// subprograms.
void DwarfWriter::ConstructSubprogramDIEs(Module &M) {
void DwarfWriter::ConstructSubprogramDIEs() {
std::vector<SubprogramDesc *> Subprograms =
DebugInfo->getAnchoredDescriptors<SubprogramDesc>(M);
DebugInfo->getAnchoredDescriptors<SubprogramDesc>(*M);
for (unsigned i = 0, N = Subprograms.size(); i < N; ++i) {
SubprogramDesc *SPD = Subprograms[i];
@ -2088,6 +2257,16 @@ bool DwarfWriter::ShouldEmitDwarf() {
// Make sure initial declarations are made.
if (!didInitial) {
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();
didInitial = true;
}
@ -2102,8 +2281,11 @@ bool DwarfWriter::ShouldEmitDwarf() {
DwarfWriter::DwarfWriter(std::ostream &OS, AsmPrinter *A)
: O(OS)
, Asm(A)
, M(NULL)
, MF(NULL)
, DebugInfo(NULL)
, didInitial(false)
, SubprogramCount(0)
, CompileUnits()
, Abbreviations()
, StringPool()
@ -2137,14 +2319,16 @@ DwarfWriter::~DwarfWriter() {
/// BeginModule - Emit all Dwarf sections that should come prior to the content.
///
void DwarfWriter::BeginModule(Module &M) {
void DwarfWriter::BeginModule(Module *M) {
this->M = M;
if (!ShouldEmitDwarf()) return;
EOL("Dwarf Begin Module");
}
/// EndModule - Emit all Dwarf sections that should come after the content.
///
void DwarfWriter::EndModule(Module &M) {
void DwarfWriter::EndModule() {
if (!ShouldEmitDwarf()) return;
EOL("Dwarf End Module");
@ -2154,15 +2338,6 @@ void DwarfWriter::EndModule(Module &M) {
Asm->SwitchSection(DataSection, 0);
EmitLabel("data_end", 0);
// Create all the compile unit DIEs.
ConstructCompileUnitDIEs();
// Create DIEs for each of the externally visible global variables.
ConstructGlobalDIEs(M);
// Create DIEs for each of the externally visible subprograms.
ConstructSubprogramDIEs(M);
// Compute DIE offsets and sizes.
SizeAndOffsets();
@ -2176,7 +2351,7 @@ void DwarfWriter::EndModule(Module &M) {
EmitDebugLines();
// Emit info into a debug frame section.
// EmitDebugFrame();
EmitDebugFrame();
// Emit info into a debug pubnames section.
EmitDebugPubNames();
@ -2199,14 +2374,29 @@ void DwarfWriter::EndModule(Module &M) {
/// BeginFunction - Gather pre-function debug information.
///
void DwarfWriter::BeginFunction(MachineFunction &MF) {
void DwarfWriter::BeginFunction(MachineFunction *MF) {
this->MF = MF;
if (!ShouldEmitDwarf()) return;
EOL("Dwarf Begin Function");
// Define begin label for subprogram.
Asm->SwitchSection(TextSection, 0);
EmitLabel("func_begin", ++SubprogramCount);
}
/// EndFunction - Gather and emit post-function debug information.
///
void DwarfWriter::EndFunction(MachineFunction &MF) {
void DwarfWriter::EndFunction() {
if (!ShouldEmitDwarf()) return;
EOL("Dwarf End Function");
// Define end label for subprogram.
Asm->SwitchSection(TextSection, 0);
EmitLabel("func_end", SubprogramCount);
// Construct scopes for subprogram.
ConstructRootScope(DebugInfo->getRootScope());
DebugInfo->ClearScopes();
}

189
lib/CodeGen/MachineDebugInfo.cpp
View File

@ -477,7 +477,6 @@ DebugInfoDesc *DebugInfoDesc::DescFactory(unsigned Tag) {
case DW_TAG_const_type:
case DW_TAG_volatile_type:
case DW_TAG_restrict_type:
case DW_TAG_formal_parameter:
case DW_TAG_member: return new DerivedTypeDesc(Tag);
case DW_TAG_array_type:
case DW_TAG_structure_type:
@ -485,6 +484,9 @@ DebugInfoDesc *DebugInfoDesc::DescFactory(unsigned Tag) {
case DW_TAG_enumeration_type: return new CompositeTypeDesc(Tag);
case DW_TAG_subrange_type: return new SubrangeDesc();
case DW_TAG_enumerator: return new EnumeratorDesc();
case DW_TAG_return_variable:
case DW_TAG_arg_variable:
case DW_TAG_auto_variable: return new VariableDesc(Tag);
default: break;
}
return NULL;
@ -654,6 +656,7 @@ TypeDesc::TypeDesc(unsigned T)
, Context(NULL)
, Name("")
, File(NULL)
, Line(0)
, Size(0)
, Align(0)
, Offset(0)
@ -759,7 +762,6 @@ bool DerivedTypeDesc::classof(const DebugInfoDesc *D) {
case DW_TAG_const_type:
case DW_TAG_volatile_type:
case DW_TAG_restrict_type:
case DW_TAG_formal_parameter:
case DW_TAG_member:
return true;
default: break;
@ -943,6 +945,66 @@ void EnumeratorDesc::dump() {
//===----------------------------------------------------------------------===//
VariableDesc::VariableDesc(unsigned T)
: DebugInfoDesc(T)
, Context(NULL)
, Name("")
, File(NULL)
, Line(0)
, TyDesc(0)
{}
// Implement isa/cast/dyncast.
bool VariableDesc::classof(const DebugInfoDesc *D) {
unsigned T = D->getTag();
switch (T) {
case DW_TAG_auto_variable:
case DW_TAG_arg_variable:
case DW_TAG_return_variable:
return true;
default: break;
}
return false;
}
/// ApplyToFields - Target the visitor to the fields of the VariableDesc.
///
void VariableDesc::ApplyToFields(DIVisitor *Visitor) {
DebugInfoDesc::ApplyToFields(Visitor);
Visitor->Apply(Context);
Visitor->Apply(Name);
Visitor->Apply((DebugInfoDesc *&)File);
Visitor->Apply(Line);
Visitor->Apply((DebugInfoDesc *&)TyDesc);
}
/// getDescString - Return a string used to compose global names and labels.
///
const char *VariableDesc::getDescString() const {
return "llvm.dbg.variable";
}
/// getTypeString - Return a string used to label this descriptor's type.
///
const char *VariableDesc::getTypeString() const {
return "llvm.dbg.variable.type";
}
#ifndef NDEBUG
void VariableDesc::dump() {
std::cerr << getDescString() << " "
<< "Tag(" << getTag() << "), "
<< "Context(" << Context << "), "
<< "Name(\"" << Name << "\"), "
<< "File(" << File << "), "
<< "Line(" << Line << "), "
<< "TyDesc(" << TyDesc << ")\n";
}
#endif
//===----------------------------------------------------------------------===//
GlobalDesc::GlobalDesc(unsigned T)
: AnchoredDesc(T)
, Context(0)
@ -1015,7 +1077,7 @@ void GlobalVariableDesc::dump() {
<< "Name(\"" << getName() << "\"), "
<< "File(" << getFile() << "),"
<< "Line(" << getLine() << "),"
<< "Type(\"" << getTypeDesc() << "\"), "
<< "Type(\"" << getType() << "\"), "
<< "IsStatic(" << (isStatic() ? "true" : "false") << "), "
<< "IsDefinition(" << (isDefinition() ? "true" : "false") << "), "
<< "Global(" << Global << ")\n";
@ -1037,8 +1099,6 @@ bool SubprogramDesc::classof(const DebugInfoDesc *D) {
/// SubprogramDesc.
void SubprogramDesc::ApplyToFields(DIVisitor *Visitor) {
GlobalDesc::ApplyToFields(Visitor);
Visitor->Apply(Elements);
}
/// getDescString - Return a string used to compose global names and labels.
@ -1068,7 +1128,7 @@ void SubprogramDesc::dump() {
<< "Name(\"" << getName() << "\"), "
<< "File(" << getFile() << "),"
<< "Line(" << getLine() << "),"
<< "Type(\"" << getTypeDesc() << "\"), "
<< "Type(\"" << getType() << "\"), "
<< "IsStatic(" << (isStatic() ? "true" : "false") << "), "
<< "IsDefinition(" << (isDefinition() ? "true" : "false") << ")\n";
}
@ -1078,6 +1138,7 @@ void SubprogramDesc::dump() {
BlockDesc::BlockDesc()
: DebugInfoDesc(DW_TAG_lexical_block)
, Context(NULL)
{}
// Implement isa/cast/dyncast.
@ -1090,7 +1151,7 @@ bool BlockDesc::classof(const DebugInfoDesc *D) {
void BlockDesc::ApplyToFields(DIVisitor *Visitor) {
DebugInfoDesc::ApplyToFields(Visitor);
Visitor->Apply(Elements);
Visitor->Apply(Context);
}
/// getDescString - Return a string used to compose global names and labels.
@ -1108,7 +1169,8 @@ const char *BlockDesc::getTypeString() const {
#ifndef NDEBUG
void BlockDesc::dump() {
std::cerr << getDescString() << " "
<< "Tag(" << getTag() << ")\n";
<< "Tag(" << getTag() << "),"
<< "Context(" << Context << ")\n";
}
#endif
@ -1284,14 +1346,17 @@ bool DIVerifier::Verify(GlobalVariable *GV) {
// Get the Tag
unsigned Tag = DebugInfoDesc::TagFromGlobal(GV);
if (Tag == DW_TAG_invalid) return false;
// Check for user defined descriptors.
if (Tag == DW_TAG_invalid) return true;
// If a compile unit we need the debug version.
if (Tag == DW_TAG_compile_unit) {
DebugVersion = CompileUnitDesc::DebugVersionFromGlobal(GV);
if (DebugVersion == DW_TAG_invalid) return false;
// FIXME - In the short term, changes are too drastic to continue.
if (DebugVersion != LLVMDebugVersion) return false;
}
// Construct an empty DebugInfoDesc.
DebugInfoDesc *DD = DebugInfoDesc::DescFactory(Tag);
@ -1332,13 +1397,23 @@ bool DIVerifier::Verify(GlobalVariable *GV) {
//===----------------------------------------------------------------------===//
DebugScope::~DebugScope() {
for (unsigned i = 0, N = Scopes.size(); i < N; ++i) delete Scopes[i];
for (unsigned j = 0, M = Variables.size(); j < M; ++j) delete Variables[j];
}
//===----------------------------------------------------------------------===//
MachineDebugInfo::MachineDebugInfo()
: DR()
, VR()
, CompileUnits()
, Directories()
, SourceFiles()
, Lines()
, LabelID(0)
, ScopeMap()
, RootScope(NULL)
{
}
@ -1368,7 +1443,6 @@ DebugInfoDesc *MachineDebugInfo::getDescFor(Value *V) {
/// Verify - Verify that a Value is debug information descriptor.
///
bool MachineDebugInfo::Verify(Value *V) {
DIVerifier VR;
return VR.Verify(V);
}
@ -1401,3 +1475,94 @@ MachineDebugInfo::getGlobalVariablesUsing(Module &M,
const std::string &RootName) {
return ::getGlobalVariablesUsing(M, RootName);
}
/// RecordLabel - Records location information and associates it with a
/// debug label. Returns a unique label ID used to generate a label and
/// provide correspondence to the source line list.
unsigned MachineDebugInfo::RecordLabel(unsigned Line, unsigned Column,
unsigned Source) {
unsigned ID = NextLabelID();
Lines.push_back(new SourceLineInfo(Line, Column, Source, ID));
return ID;
}
/// RecordSource - Register a source file with debug info. Returns an source
/// ID.
unsigned MachineDebugInfo::RecordSource(const std::string &Directory,
const std::string &Source) {
unsigned DirectoryID = Directories.insert(Directory);
return SourceFiles.insert(SourceFileInfo(DirectoryID, Source));
}
unsigned MachineDebugInfo::RecordSource(const CompileUnitDesc *CompileUnit) {
return RecordSource(CompileUnit->getDirectory(),
CompileUnit->getFileName());
}
/// RecordRegionStart - Indicate the start of a region.
///
unsigned MachineDebugInfo::RecordRegionStart(Value *V) {
// FIXME - need to be able to handle split scopes because of bb cloning.
DebugInfoDesc *ScopeDesc = DR.Deserialize(V);
DebugScope *Scope = getOrCreateScope(ScopeDesc);
unsigned ID = NextLabelID();
if (!Scope->getStartLabelID()) Scope->setStartLabelID(ID);
return ID;
}
/// RecordRegionEnd - Indicate the end of a region.
///
unsigned MachineDebugInfo::RecordRegionEnd(Value *V) {
// FIXME - need to be able to handle split scopes because of bb cloning.
DebugInfoDesc *ScopeDesc = DR.Deserialize(V);
DebugScope *Scope = getOrCreateScope(ScopeDesc);
unsigned ID = NextLabelID();
Scope->setEndLabelID(ID);
return ID;
}
/// RecordVariable - Indicate the declaration of a local variable.
///
void MachineDebugInfo::RecordVariable(Value *V, unsigned FrameIndex) {
VariableDesc *VD = cast<VariableDesc>(DR.Deserialize(V));
DebugScope *Scope = getOrCreateScope(VD->getContext());
DebugVariable *DV = new DebugVariable(VD, FrameIndex);
Scope->AddVariable(DV);
}
/// getOrCreateScope - Returns the scope associated with the given descriptor.
///
DebugScope *MachineDebugInfo::getOrCreateScope(DebugInfoDesc *ScopeDesc) {
DebugScope *&Slot = ScopeMap[ScopeDesc];
if (!Slot) {
// FIXME - breaks down when the context is an inlined function.
DebugInfoDesc *ParentDesc = NULL;
if (BlockDesc *Block = dyn_cast<BlockDesc>(ScopeDesc)) {
ParentDesc = Block->getContext();
}
DebugScope *Parent = ParentDesc ? getOrCreateScope(ParentDesc) : NULL;
Slot = new DebugScope(Parent, ScopeDesc);
if (Parent) {
Parent->AddScope(Slot);
} else if (RootScope) {
// FIXME - Add inlined function scopes to the root so we can delete
// them later. Long term, handle inlined functions properly.
RootScope->AddScope(Slot);
} else {
// First function is top level function.
RootScope = Slot;
}
}
return Slot;
}
/// ClearScopes - Delete the scope and variable info after a function is
/// completed.
void MachineDebugInfo::ClearScopes() {
if (RootScope) {
delete RootScope;
ScopeMap.clear();
RootScope = NULL;
}
}