mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-25 14:32:53 +00:00
f6ccee5a9d
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76962 91177308-0d34-0410-b5e6-96231b3b80d8
489 lines
16 KiB
C++
489 lines
16 KiB
C++
//===-- PIC16DebugInfo.cpp - Implementation for PIC16 Debug Information ======//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file contains the helper functions for representing debug information.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "PIC16.h"
|
|
#include "PIC16DebugInfo.h"
|
|
#include "llvm/GlobalVariable.h"
|
|
#include "llvm/CodeGen/MachineFunction.h"
|
|
#include "llvm/Support/DebugLoc.h"
|
|
#include "llvm/Support/FormattedStream.h"
|
|
|
|
using namespace llvm;
|
|
|
|
/// PopulateDebugInfo - Populate the TypeNo, Aux[] and TagName from Ty.
|
|
///
|
|
void PIC16DbgInfo::PopulateDebugInfo (DIType Ty, unsigned short &TypeNo,
|
|
bool &HasAux, int Aux[],
|
|
std::string &TagName) {
|
|
if (Ty.isBasicType(Ty.getTag()))
|
|
PopulateBasicTypeInfo (Ty, TypeNo);
|
|
else if (Ty.isDerivedType(Ty.getTag()))
|
|
PopulateDerivedTypeInfo (Ty, TypeNo, HasAux, Aux, TagName);
|
|
else if (Ty.isCompositeType(Ty.getTag()))
|
|
PopulateCompositeTypeInfo (Ty, TypeNo, HasAux, Aux, TagName);
|
|
else {
|
|
TypeNo = PIC16Dbg::T_NULL;
|
|
HasAux = false;
|
|
}
|
|
return;
|
|
}
|
|
|
|
/// PopulateBasicTypeInfo- Populate TypeNo for basic type from Ty.
|
|
///
|
|
void PIC16DbgInfo::PopulateBasicTypeInfo (DIType Ty, unsigned short &TypeNo) {
|
|
std::string Name = "";
|
|
Ty.getName(Name);
|
|
unsigned short BaseTy = GetTypeDebugNumber(Name);
|
|
TypeNo = TypeNo << PIC16Dbg::S_BASIC;
|
|
TypeNo = TypeNo | (0xffff & BaseTy);
|
|
}
|
|
|
|
/// PopulateDerivedTypeInfo - Populate TypeNo, Aux[], TagName for derived type
|
|
/// from Ty. Derived types are mostly pointers.
|
|
///
|
|
void PIC16DbgInfo::PopulateDerivedTypeInfo (DIType Ty, unsigned short &TypeNo,
|
|
bool &HasAux, int Aux[],
|
|
std::string &TagName) {
|
|
|
|
switch(Ty.getTag())
|
|
{
|
|
case dwarf::DW_TAG_pointer_type:
|
|
TypeNo = TypeNo << PIC16Dbg::S_DERIVED;
|
|
TypeNo = TypeNo | PIC16Dbg::DT_PTR;
|
|
break;
|
|
default:
|
|
TypeNo = TypeNo << PIC16Dbg::S_DERIVED;
|
|
}
|
|
|
|
// We also need to encode the the information about the base type of
|
|
// pointer in TypeNo.
|
|
DIType BaseType = DIDerivedType(Ty.getGV()).getTypeDerivedFrom();
|
|
PopulateDebugInfo(BaseType, TypeNo, HasAux, Aux, TagName);
|
|
}
|
|
|
|
/// PopulateArrayTypeInfo - Populate TypeNo, Aux[] for array from Ty.
|
|
void PIC16DbgInfo::PopulateArrayTypeInfo (DIType Ty, unsigned short &TypeNo,
|
|
bool &HasAux, int Aux[],
|
|
std::string &TagName) {
|
|
|
|
DICompositeType CTy = DICompositeType(Ty.getGV());
|
|
DIArray Elements = CTy.getTypeArray();
|
|
unsigned short size = 1;
|
|
unsigned short Dimension[4]={0,0,0,0};
|
|
for (unsigned i = 0, N = Elements.getNumElements(); i < N; ++i) {
|
|
DIDescriptor Element = Elements.getElement(i);
|
|
if (Element.getTag() == dwarf::DW_TAG_subrange_type) {
|
|
TypeNo = TypeNo << PIC16Dbg::S_DERIVED;
|
|
TypeNo = TypeNo | PIC16Dbg::DT_ARY;
|
|
DISubrange SubRange = DISubrange(Element.getGV());
|
|
Dimension[i] = SubRange.getHi() - SubRange.getLo() + 1;
|
|
// Each dimension is represented by 2 bytes starting at byte 9.
|
|
Aux[8+i*2+0] = Dimension[i];
|
|
Aux[8+i*2+1] = Dimension[i] >> 8;
|
|
size = size * Dimension[i];
|
|
}
|
|
}
|
|
HasAux = true;
|
|
// In auxillary entry for array, 7th and 8th byte represent array size.
|
|
Aux[6] = size & 0xff;
|
|
Aux[7] = size >> 8;
|
|
DIType BaseType = CTy.getTypeDerivedFrom();
|
|
PopulateDebugInfo(BaseType, TypeNo, HasAux, Aux, TagName);
|
|
}
|
|
|
|
/// PopulateStructOrUnionTypeInfo - Populate TypeNo, Aux[] , TagName for
|
|
/// structure or union.
|
|
///
|
|
void PIC16DbgInfo::PopulateStructOrUnionTypeInfo (DIType Ty,
|
|
unsigned short &TypeNo,
|
|
bool &HasAux, int Aux[],
|
|
std::string &TagName) {
|
|
DICompositeType CTy = DICompositeType(Ty.getGV());
|
|
TypeNo = TypeNo << PIC16Dbg::S_BASIC;
|
|
if (Ty.getTag() == dwarf::DW_TAG_structure_type)
|
|
TypeNo = TypeNo | PIC16Dbg::T_STRUCT;
|
|
else
|
|
TypeNo = TypeNo | PIC16Dbg::T_UNION;
|
|
CTy.getName(TagName);
|
|
// UniqueSuffix is .number where number is obtained from
|
|
// llvm.dbg.composite<number>.
|
|
std::string UniqueSuffix = "." + Ty.getGV()->getNameStr().substr(18);
|
|
TagName += UniqueSuffix;
|
|
unsigned short size = CTy.getSizeInBits()/8;
|
|
// 7th and 8th byte represent size.
|
|
HasAux = true;
|
|
Aux[6] = size & 0xff;
|
|
Aux[7] = size >> 8;
|
|
}
|
|
|
|
/// PopulateEnumTypeInfo - Populate TypeNo for enum from Ty.
|
|
void PIC16DbgInfo::PopulateEnumTypeInfo (DIType Ty, unsigned short &TypeNo) {
|
|
TypeNo = TypeNo << PIC16Dbg::S_BASIC;
|
|
TypeNo = TypeNo | PIC16Dbg::T_ENUM;
|
|
}
|
|
|
|
/// PopulateCompositeTypeInfo - Populate TypeNo, Aux[] and TagName for
|
|
/// composite types from Ty.
|
|
///
|
|
void PIC16DbgInfo::PopulateCompositeTypeInfo (DIType Ty, unsigned short &TypeNo,
|
|
bool &HasAux, int Aux[],
|
|
std::string &TagName) {
|
|
switch (Ty.getTag()) {
|
|
case dwarf::DW_TAG_array_type: {
|
|
PopulateArrayTypeInfo (Ty, TypeNo, HasAux, Aux, TagName);
|
|
break;
|
|
}
|
|
case dwarf:: DW_TAG_union_type:
|
|
case dwarf::DW_TAG_structure_type: {
|
|
PopulateStructOrUnionTypeInfo (Ty, TypeNo, HasAux, Aux, TagName);
|
|
break;
|
|
}
|
|
case dwarf::DW_TAG_enumeration_type: {
|
|
PopulateEnumTypeInfo (Ty, TypeNo);
|
|
break;
|
|
}
|
|
default:
|
|
TypeNo = TypeNo << PIC16Dbg::S_DERIVED;
|
|
}
|
|
}
|
|
|
|
/// GetTypeDebugNumber - Get debug type number for given type.
|
|
///
|
|
unsigned PIC16DbgInfo::GetTypeDebugNumber(std::string &type) {
|
|
if (type == "char")
|
|
return PIC16Dbg::T_CHAR;
|
|
else if (type == "short")
|
|
return PIC16Dbg::T_SHORT;
|
|
else if (type == "int")
|
|
return PIC16Dbg::T_INT;
|
|
else if (type == "long")
|
|
return PIC16Dbg::T_LONG;
|
|
else if (type == "unsigned char")
|
|
return PIC16Dbg::T_UCHAR;
|
|
else if (type == "unsigned short")
|
|
return PIC16Dbg::T_USHORT;
|
|
else if (type == "unsigned int")
|
|
return PIC16Dbg::T_UINT;
|
|
else if (type == "unsigned long")
|
|
return PIC16Dbg::T_ULONG;
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
/// GetStorageClass - Get storage class for give debug variable.
|
|
///
|
|
short PIC16DbgInfo::getStorageClass(DIGlobalVariable DIGV) {
|
|
short ClassNo;
|
|
if (PAN::isLocalName(DIGV.getGlobal()->getName())) {
|
|
// Generating C_AUTO here fails due to error in linker. Change it once
|
|
// linker is fixed.
|
|
ClassNo = PIC16Dbg::C_STAT;
|
|
}
|
|
else if (DIGV.isLocalToUnit())
|
|
ClassNo = PIC16Dbg::C_STAT;
|
|
else
|
|
ClassNo = PIC16Dbg::C_EXT;
|
|
return ClassNo;
|
|
}
|
|
|
|
/// BeginModule - Emit necessary debug info to start a Module and do other
|
|
/// required initializations.
|
|
void PIC16DbgInfo::BeginModule(Module &M) {
|
|
// Emit file directive for module.
|
|
SmallVector<GlobalVariable *, 2> CUs;
|
|
SmallVector<GlobalVariable *, 4> GVs;
|
|
SmallVector<GlobalVariable *, 4> SPs;
|
|
CollectDebugInfoAnchors(M, CUs, GVs, SPs);
|
|
if (!CUs.empty()) {
|
|
// FIXME : What if more then one CUs are present in a module ?
|
|
GlobalVariable *CU = CUs[0];
|
|
EmitDebugDirectives = true;
|
|
SwitchToCU(CU);
|
|
}
|
|
|
|
// Emit debug info for decls of composite types.
|
|
EmitCompositeTypeDecls(M);
|
|
}
|
|
|
|
/// Helper to find first valid debug loc for a function.
|
|
///
|
|
static const DebugLoc GetDebugLocForFunction(const MachineFunction &MF) {
|
|
DebugLoc DL;
|
|
for (MachineFunction::const_iterator I = MF.begin(), E = MF.end();
|
|
I != E; ++I) {
|
|
for (MachineBasicBlock::const_iterator II = I->begin(), E = I->end();
|
|
II != E; ++II) {
|
|
DL = II->getDebugLoc();
|
|
if (!DL.isUnknown())
|
|
return DL;
|
|
}
|
|
}
|
|
return DL;
|
|
}
|
|
|
|
/// BeginFunction - Emit necessary debug info to start a function.
|
|
///
|
|
void PIC16DbgInfo::BeginFunction(const MachineFunction &MF) {
|
|
if (! EmitDebugDirectives) return;
|
|
|
|
// Retreive the first valid debug Loc and process it.
|
|
const DebugLoc &DL = GetDebugLocForFunction(MF);
|
|
ChangeDebugLoc(MF, DL, true);
|
|
|
|
EmitFunctBeginDI(MF.getFunction());
|
|
|
|
// Set current line to 0 so that.line directive is genearted after .bf.
|
|
CurLine = 0;
|
|
}
|
|
|
|
/// ChangeDebugLoc - Take necessary steps when DebugLoc changes.
|
|
/// CurFile and CurLine may change as a result of this.
|
|
///
|
|
void PIC16DbgInfo::ChangeDebugLoc(const MachineFunction &MF,
|
|
const DebugLoc &DL, bool IsInBeginFunction) {
|
|
if (! EmitDebugDirectives) return;
|
|
assert (! DL.isUnknown() && "can't change to invalid debug loc");
|
|
|
|
GlobalVariable *CU = MF.getDebugLocTuple(DL).CompileUnit;
|
|
unsigned line = MF.getDebugLocTuple(DL).Line;
|
|
|
|
SwitchToCU(CU);
|
|
SwitchToLine(line, IsInBeginFunction);
|
|
}
|
|
|
|
/// SwitchToLine - Emit line directive for a new line.
|
|
///
|
|
void PIC16DbgInfo::SwitchToLine(unsigned Line, bool IsInBeginFunction) {
|
|
if (CurLine == Line) return;
|
|
if (!IsInBeginFunction) O << "\n\t.line " << Line << "\n";
|
|
CurLine = Line;
|
|
}
|
|
|
|
/// EndFunction - Emit .ef for end of function.
|
|
///
|
|
void PIC16DbgInfo::EndFunction(const MachineFunction &MF) {
|
|
if (! EmitDebugDirectives) return;
|
|
EmitFunctEndDI(MF.getFunction(), CurLine);
|
|
}
|
|
|
|
/// EndModule - Emit .eof for end of module.
|
|
///
|
|
void PIC16DbgInfo::EndModule(Module &M) {
|
|
if (! EmitDebugDirectives) return;
|
|
EmitVarDebugInfo(M);
|
|
if (CurFile != "") O << "\n\t.eof";
|
|
}
|
|
|
|
/// EmitCompositeTypeElements - Emit debug information for members of a
|
|
/// composite type.
|
|
///
|
|
void PIC16DbgInfo::EmitCompositeTypeElements (DICompositeType CTy,
|
|
std::string UniqueSuffix) {
|
|
unsigned long Value = 0;
|
|
DIArray Elements = CTy.getTypeArray();
|
|
for (unsigned i = 0, N = Elements.getNumElements(); i < N; i++) {
|
|
DIDescriptor Element = Elements.getElement(i);
|
|
unsigned short TypeNo = 0;
|
|
bool HasAux = false;
|
|
int ElementAux[PIC16Dbg::AuxSize] = { 0 };
|
|
std::string TagName = "";
|
|
std::string ElementName;
|
|
GlobalVariable *GV = Element.getGV();
|
|
DIDerivedType DITy(GV);
|
|
DITy.getName(ElementName);
|
|
unsigned short ElementSize = DITy.getSizeInBits()/8;
|
|
// Get mangleddd name for this structure/union element.
|
|
std::string MangMemName = ElementName + UniqueSuffix;
|
|
PopulateDebugInfo(DITy, TypeNo, HasAux, ElementAux, TagName);
|
|
short Class = 0;
|
|
if( CTy.getTag() == dwarf::DW_TAG_union_type)
|
|
Class = PIC16Dbg::C_MOU;
|
|
else if (CTy.getTag() == dwarf::DW_TAG_structure_type)
|
|
Class = PIC16Dbg::C_MOS;
|
|
EmitSymbol(MangMemName, Class, TypeNo, Value);
|
|
if (CTy.getTag() == dwarf::DW_TAG_structure_type)
|
|
Value += ElementSize;
|
|
if (HasAux)
|
|
EmitAuxEntry(MangMemName, ElementAux, PIC16Dbg::AuxSize, TagName);
|
|
}
|
|
}
|
|
|
|
/// EmitCompositeTypeDecls - Emit composite type declarations like structure
|
|
/// and union declarations.
|
|
///
|
|
void PIC16DbgInfo::EmitCompositeTypeDecls(Module &M) {
|
|
for(iplist<GlobalVariable>::iterator I = M.getGlobalList().begin(),
|
|
E = M.getGlobalList().end(); I != E; I++) {
|
|
// Structures and union declaration's debug info has llvm.dbg.composite
|
|
// in its name.
|
|
// FIXME: Checking and relying on llvm.dbg.composite name is not a good idea.
|
|
if(I->getNameStr().find("llvm.dbg.composite") != std::string::npos) {
|
|
GlobalVariable *GV = cast<GlobalVariable >(I);
|
|
DICompositeType CTy(GV);
|
|
if (CTy.getTag() == dwarf::DW_TAG_union_type ||
|
|
CTy.getTag() == dwarf::DW_TAG_structure_type ) {
|
|
std::string name;
|
|
CTy.getName(name);
|
|
std::string DIVar = I->getName();
|
|
// Get the number after llvm.dbg.composite and make UniqueSuffix from
|
|
// it.
|
|
std::string UniqueSuffix = "." + DIVar.substr(18);
|
|
std::string MangledCTyName = name + UniqueSuffix;
|
|
unsigned short size = CTy.getSizeInBits()/8;
|
|
int Aux[PIC16Dbg::AuxSize] = {0};
|
|
// 7th and 8th byte represent size of structure/union.
|
|
Aux[6] = size & 0xff;
|
|
Aux[7] = size >> 8;
|
|
// Emit .def for structure/union tag.
|
|
if( CTy.getTag() == dwarf::DW_TAG_union_type)
|
|
EmitSymbol(MangledCTyName, PIC16Dbg::C_UNTAG);
|
|
else if (CTy.getTag() == dwarf::DW_TAG_structure_type)
|
|
EmitSymbol(MangledCTyName, PIC16Dbg::C_STRTAG);
|
|
|
|
// Emit auxiliary debug information for structure/union tag.
|
|
EmitAuxEntry(MangledCTyName, Aux, PIC16Dbg::AuxSize);
|
|
|
|
// Emit members.
|
|
EmitCompositeTypeElements (CTy, UniqueSuffix);
|
|
|
|
// Emit mangled Symbol for end of structure/union.
|
|
std::string EOSSymbol = ".eos" + UniqueSuffix;
|
|
EmitSymbol(EOSSymbol, PIC16Dbg::C_EOS);
|
|
EmitAuxEntry(EOSSymbol, Aux, PIC16Dbg::AuxSize, MangledCTyName);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/// EmitFunctBeginDI - Emit .bf for function.
|
|
///
|
|
void PIC16DbgInfo::EmitFunctBeginDI(const Function *F) {
|
|
std::string FunctName = F->getName();
|
|
if (EmitDebugDirectives) {
|
|
std::string FunctBeginSym = ".bf." + FunctName;
|
|
std::string BlockBeginSym = ".bb." + FunctName;
|
|
|
|
int BFAux[PIC16Dbg::AuxSize] = {0};
|
|
BFAux[4] = CurLine;
|
|
BFAux[5] = CurLine >> 8;
|
|
|
|
// Emit debug directives for beginning of function.
|
|
EmitSymbol(FunctBeginSym, PIC16Dbg::C_FCN);
|
|
EmitAuxEntry(FunctBeginSym, BFAux, PIC16Dbg::AuxSize);
|
|
|
|
EmitSymbol(BlockBeginSym, PIC16Dbg::C_BLOCK);
|
|
EmitAuxEntry(BlockBeginSym, BFAux, PIC16Dbg::AuxSize);
|
|
}
|
|
}
|
|
|
|
/// EmitFunctEndDI - Emit .ef for function end.
|
|
///
|
|
void PIC16DbgInfo::EmitFunctEndDI(const Function *F, unsigned Line) {
|
|
std::string FunctName = F->getName();
|
|
if (EmitDebugDirectives) {
|
|
std::string FunctEndSym = ".ef." + FunctName;
|
|
std::string BlockEndSym = ".eb." + FunctName;
|
|
|
|
// Emit debug directives for end of function.
|
|
EmitSymbol(BlockEndSym, PIC16Dbg::C_BLOCK);
|
|
int EFAux[PIC16Dbg::AuxSize] = {0};
|
|
// 5th and 6th byte stand for line number.
|
|
EFAux[4] = CurLine;
|
|
EFAux[5] = CurLine >> 8;
|
|
EmitAuxEntry(BlockEndSym, EFAux, PIC16Dbg::AuxSize);
|
|
EmitSymbol(FunctEndSym, PIC16Dbg::C_FCN);
|
|
EmitAuxEntry(FunctEndSym, EFAux, PIC16Dbg::AuxSize);
|
|
}
|
|
}
|
|
|
|
/// EmitAuxEntry - Emit Auxiliary debug information.
|
|
///
|
|
void PIC16DbgInfo::EmitAuxEntry(const std::string VarName, int Aux[], int Num,
|
|
std::string TagName) {
|
|
O << "\n\t.dim " << VarName << ", 1" ;
|
|
// TagName is emitted in case of structure/union objects.
|
|
if (TagName != "")
|
|
O << ", " << TagName;
|
|
for (int i = 0; i<Num; i++)
|
|
O << "," << Aux[i];
|
|
}
|
|
|
|
/// EmitSymbol - Emit .def for a symbol. Value is offset for the member.
|
|
///
|
|
void PIC16DbgInfo::EmitSymbol(std::string Name, short Class, unsigned short
|
|
Type, unsigned long Value) {
|
|
O << "\n\t" << ".def "<< Name << ", type = " << Type << ", class = "
|
|
<< Class;
|
|
if (Value > 0)
|
|
O << ", value = " << Value;
|
|
}
|
|
|
|
/// EmitVarDebugInfo - Emit debug information for all variables.
|
|
///
|
|
void PIC16DbgInfo::EmitVarDebugInfo(Module &M) {
|
|
SmallVector<GlobalVariable *, 2> CUs;
|
|
SmallVector<GlobalVariable *, 4> GVs;
|
|
SmallVector<GlobalVariable *, 4> SPs;
|
|
CollectDebugInfoAnchors(M, CUs, GVs, SPs);
|
|
if (GVs.empty())
|
|
return;
|
|
|
|
for (SmallVector<GlobalVariable *, 4>::iterator I = GVs.begin(),
|
|
E = GVs.end(); I != E; ++I) {
|
|
DIGlobalVariable DIGV(*I);
|
|
DIType Ty = DIGV.getType();
|
|
unsigned short TypeNo = 0;
|
|
bool HasAux = false;
|
|
int Aux[PIC16Dbg::AuxSize] = { 0 };
|
|
std::string TagName = "";
|
|
std::string VarName = TAI->getGlobalPrefix()+DIGV.getGlobal()->getNameStr();
|
|
PopulateDebugInfo(Ty, TypeNo, HasAux, Aux, TagName);
|
|
// Emit debug info only if type information is availaible.
|
|
if (TypeNo != PIC16Dbg::T_NULL) {
|
|
O << "\n\t.type " << VarName << ", " << TypeNo;
|
|
short ClassNo = getStorageClass(DIGV);
|
|
O << "\n\t.class " << VarName << ", " << ClassNo;
|
|
if (HasAux)
|
|
EmitAuxEntry(VarName, Aux, PIC16Dbg::AuxSize, TagName);
|
|
}
|
|
}
|
|
O << "\n";
|
|
}
|
|
|
|
/// SwitchToCU - Switch to a new compilation unit.
|
|
///
|
|
void PIC16DbgInfo::SwitchToCU(GlobalVariable *CU) {
|
|
// Get the file path from CU.
|
|
DICompileUnit cu(CU);
|
|
std::string DirName, FileName;
|
|
std::string FilePath = cu.getDirectory(DirName) + "/" +
|
|
cu.getFilename(FileName);
|
|
|
|
// Nothing to do if source file is still same.
|
|
if ( FilePath == CurFile ) return;
|
|
|
|
// Else, close the current one and start a new.
|
|
if (CurFile != "") O << "\n\t.eof";
|
|
O << "\n\t.file\t\"" << FilePath << "\"\n" ;
|
|
CurFile = FilePath;
|
|
CurLine = 0;
|
|
}
|
|
|
|
/// EmitEOF - Emit .eof for end of file.
|
|
///
|
|
void PIC16DbgInfo::EmitEOF() {
|
|
if (CurFile != "")
|
|
O << "\n\t.EOF";
|
|
}
|
|
|