mirror of
https://github.com/c64scene-ar/llvm-6502.git
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1c3451fc99
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89873 91177308-0d34-0410-b5e6-96231b3b80d8
489 lines
16 KiB
C++
489 lines
16 KiB
C++
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//===-- PIC16DebugInfo.cpp - Implementation for PIC16 Debug Information ======//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file contains the helper functions for representing debug information.
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//
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//===----------------------------------------------------------------------===//
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#include "PIC16.h"
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#include "PIC16ABINames.h"
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#include "PIC16DebugInfo.h"
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#include "llvm/GlobalVariable.h"
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#include "llvm/CodeGen/MachineFunction.h"
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#include "llvm/MC/MCAsmInfo.h"
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#include "llvm/Support/DebugLoc.h"
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#include "llvm/Support/FormattedStream.h"
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#include "llvm/ADT/SmallString.h"
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using namespace llvm;
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/// PopulateDebugInfo - Populate the TypeNo, Aux[] and TagName from Ty.
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///
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void PIC16DbgInfo::PopulateDebugInfo (DIType Ty, unsigned short &TypeNo,
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bool &HasAux, int Aux[],
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std::string &TagName) {
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if (Ty.isBasicType())
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PopulateBasicTypeInfo (Ty, TypeNo);
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else if (Ty.isCompositeType())
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PopulateCompositeTypeInfo (Ty, TypeNo, HasAux, Aux, TagName);
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else if (Ty.isDerivedType())
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PopulateDerivedTypeInfo (Ty, TypeNo, HasAux, Aux, TagName);
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else {
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TypeNo = PIC16Dbg::T_NULL;
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HasAux = false;
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}
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return;
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}
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/// PopulateBasicTypeInfo- Populate TypeNo for basic type from Ty.
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///
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void PIC16DbgInfo::PopulateBasicTypeInfo (DIType Ty, unsigned short &TypeNo) {
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std::string Name = Ty.getName();
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unsigned short BaseTy = GetTypeDebugNumber(Name);
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TypeNo = TypeNo << PIC16Dbg::S_BASIC;
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TypeNo = TypeNo | (0xffff & BaseTy);
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}
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/// PopulateDerivedTypeInfo - Populate TypeNo, Aux[], TagName for derived type
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/// from Ty. Derived types are mostly pointers.
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///
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void PIC16DbgInfo::PopulateDerivedTypeInfo (DIType Ty, unsigned short &TypeNo,
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bool &HasAux, int Aux[],
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std::string &TagName) {
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switch(Ty.getTag())
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{
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case dwarf::DW_TAG_pointer_type:
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TypeNo = TypeNo << PIC16Dbg::S_DERIVED;
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TypeNo = TypeNo | PIC16Dbg::DT_PTR;
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break;
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default:
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TypeNo = TypeNo << PIC16Dbg::S_DERIVED;
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}
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// We also need to encode the the information about the base type of
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// pointer in TypeNo.
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DIType BaseType = DIDerivedType(Ty.getNode()).getTypeDerivedFrom();
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PopulateDebugInfo(BaseType, TypeNo, HasAux, Aux, TagName);
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}
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/// PopulateArrayTypeInfo - Populate TypeNo, Aux[] for array from Ty.
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void PIC16DbgInfo::PopulateArrayTypeInfo (DIType Ty, unsigned short &TypeNo,
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bool &HasAux, int Aux[],
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std::string &TagName) {
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DICompositeType CTy = DICompositeType(Ty.getNode());
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DIArray Elements = CTy.getTypeArray();
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unsigned short size = 1;
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unsigned short Dimension[4]={0,0,0,0};
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for (unsigned i = 0, N = Elements.getNumElements(); i < N; ++i) {
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DIDescriptor Element = Elements.getElement(i);
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if (Element.getTag() == dwarf::DW_TAG_subrange_type) {
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TypeNo = TypeNo << PIC16Dbg::S_DERIVED;
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TypeNo = TypeNo | PIC16Dbg::DT_ARY;
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DISubrange SubRange = DISubrange(Element.getNode());
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Dimension[i] = SubRange.getHi() - SubRange.getLo() + 1;
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// Each dimension is represented by 2 bytes starting at byte 9.
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Aux[8+i*2+0] = Dimension[i];
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Aux[8+i*2+1] = Dimension[i] >> 8;
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size = size * Dimension[i];
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}
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}
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HasAux = true;
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// In auxillary entry for array, 7th and 8th byte represent array size.
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Aux[6] = size & 0xff;
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Aux[7] = size >> 8;
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DIType BaseType = CTy.getTypeDerivedFrom();
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PopulateDebugInfo(BaseType, TypeNo, HasAux, Aux, TagName);
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}
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/// PopulateStructOrUnionTypeInfo - Populate TypeNo, Aux[] , TagName for
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/// structure or union.
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///
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void PIC16DbgInfo::PopulateStructOrUnionTypeInfo (DIType Ty,
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unsigned short &TypeNo,
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bool &HasAux, int Aux[],
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std::string &TagName) {
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DICompositeType CTy = DICompositeType(Ty.getNode());
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TypeNo = TypeNo << PIC16Dbg::S_BASIC;
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if (Ty.getTag() == dwarf::DW_TAG_structure_type)
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TypeNo = TypeNo | PIC16Dbg::T_STRUCT;
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else
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TypeNo = TypeNo | PIC16Dbg::T_UNION;
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TagName = CTy.getName();
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// UniqueSuffix is .number where number is obtained from
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// llvm.dbg.composite<number>.
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// FIXME: This will break when composite type is not represented by
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// llvm.dbg.composite* global variable. Since we need to revisit
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// PIC16DebugInfo implementation anyways after the MDNodes based
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// framework is done, let us continue with the way it is.
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std::string UniqueSuffix = "." + Ty.getNode()->getNameStr().substr(18);
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TagName += UniqueSuffix;
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unsigned short size = CTy.getSizeInBits()/8;
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// 7th and 8th byte represent size.
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HasAux = true;
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Aux[6] = size & 0xff;
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Aux[7] = size >> 8;
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}
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/// PopulateEnumTypeInfo - Populate TypeNo for enum from Ty.
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void PIC16DbgInfo::PopulateEnumTypeInfo (DIType Ty, unsigned short &TypeNo) {
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TypeNo = TypeNo << PIC16Dbg::S_BASIC;
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TypeNo = TypeNo | PIC16Dbg::T_ENUM;
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}
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/// PopulateCompositeTypeInfo - Populate TypeNo, Aux[] and TagName for
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/// composite types from Ty.
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///
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void PIC16DbgInfo::PopulateCompositeTypeInfo (DIType Ty, unsigned short &TypeNo,
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bool &HasAux, int Aux[],
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std::string &TagName) {
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switch (Ty.getTag()) {
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case dwarf::DW_TAG_array_type: {
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PopulateArrayTypeInfo (Ty, TypeNo, HasAux, Aux, TagName);
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break;
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}
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case dwarf:: DW_TAG_union_type:
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case dwarf::DW_TAG_structure_type: {
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PopulateStructOrUnionTypeInfo (Ty, TypeNo, HasAux, Aux, TagName);
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break;
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}
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case dwarf::DW_TAG_enumeration_type: {
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PopulateEnumTypeInfo (Ty, TypeNo);
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break;
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}
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default:
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TypeNo = TypeNo << PIC16Dbg::S_DERIVED;
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}
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}
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/// GetTypeDebugNumber - Get debug type number for given type.
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///
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unsigned PIC16DbgInfo::GetTypeDebugNumber(std::string &type) {
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if (type == "char")
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return PIC16Dbg::T_CHAR;
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else if (type == "short")
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return PIC16Dbg::T_SHORT;
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else if (type == "int")
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return PIC16Dbg::T_INT;
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else if (type == "long")
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return PIC16Dbg::T_LONG;
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else if (type == "unsigned char")
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return PIC16Dbg::T_UCHAR;
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else if (type == "unsigned short")
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return PIC16Dbg::T_USHORT;
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else if (type == "unsigned int")
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return PIC16Dbg::T_UINT;
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else if (type == "unsigned long")
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return PIC16Dbg::T_ULONG;
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else
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return 0;
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}
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/// GetStorageClass - Get storage class for give debug variable.
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///
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short PIC16DbgInfo::getStorageClass(DIGlobalVariable DIGV) {
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short ClassNo;
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if (PAN::isLocalName(DIGV.getName())) {
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// Generating C_AUTO here fails due to error in linker. Change it once
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// linker is fixed.
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ClassNo = PIC16Dbg::C_STAT;
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}
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else if (DIGV.isLocalToUnit())
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ClassNo = PIC16Dbg::C_STAT;
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else
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ClassNo = PIC16Dbg::C_EXT;
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return ClassNo;
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}
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/// BeginModule - Emit necessary debug info to start a Module and do other
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/// required initializations.
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void PIC16DbgInfo::BeginModule(Module &M) {
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// Emit file directive for module.
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DebugInfoFinder DbgFinder;
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DbgFinder.processModule(M);
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if (DbgFinder.compile_unit_count() != 0) {
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// FIXME : What if more then one CUs are present in a module ?
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MDNode *CU = *DbgFinder.compile_unit_begin();
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EmitDebugDirectives = true;
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SwitchToCU(CU);
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}
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// Emit debug info for decls of composite types.
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EmitCompositeTypeDecls(M);
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}
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/// Helper to find first valid debug loc for a function.
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///
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static const DebugLoc GetDebugLocForFunction(const MachineFunction &MF) {
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DebugLoc DL;
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for (MachineFunction::const_iterator I = MF.begin(), E = MF.end();
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I != E; ++I) {
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for (MachineBasicBlock::const_iterator II = I->begin(), E = I->end();
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II != E; ++II) {
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DL = II->getDebugLoc();
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if (!DL.isUnknown())
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return DL;
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}
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}
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return DL;
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}
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/// BeginFunction - Emit necessary debug info to start a function.
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///
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void PIC16DbgInfo::BeginFunction(const MachineFunction &MF) {
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if (! EmitDebugDirectives) return;
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// Retreive the first valid debug Loc and process it.
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const DebugLoc &DL = GetDebugLocForFunction(MF);
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// Emit debug info only if valid debug info is available.
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if (!DL.isUnknown()) {
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ChangeDebugLoc(MF, DL, true);
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EmitFunctBeginDI(MF.getFunction());
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}
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// Set current line to 0 so that.line directive is genearted after .bf.
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CurLine = 0;
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}
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/// ChangeDebugLoc - Take necessary steps when DebugLoc changes.
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/// CurFile and CurLine may change as a result of this.
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///
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void PIC16DbgInfo::ChangeDebugLoc(const MachineFunction &MF,
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const DebugLoc &DL, bool IsInBeginFunction) {
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if (! EmitDebugDirectives) return;
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assert (! DL.isUnknown() && "can't change to invalid debug loc");
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MDNode *CU = MF.getDebugLocTuple(DL).Scope;
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unsigned line = MF.getDebugLocTuple(DL).Line;
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SwitchToCU(CU);
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SwitchToLine(line, IsInBeginFunction);
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}
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/// SwitchToLine - Emit line directive for a new line.
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///
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void PIC16DbgInfo::SwitchToLine(unsigned Line, bool IsInBeginFunction) {
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if (CurLine == Line) return;
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if (!IsInBeginFunction) O << "\n\t.line " << Line << "\n";
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CurLine = Line;
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}
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/// EndFunction - Emit .ef for end of function.
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///
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void PIC16DbgInfo::EndFunction(const MachineFunction &MF) {
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if (! EmitDebugDirectives) return;
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const DebugLoc &DL = GetDebugLocForFunction(MF);
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// Emit debug info only if valid debug info is available.
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if (!DL.isUnknown())
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EmitFunctEndDI(MF.getFunction(), CurLine);
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}
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/// EndModule - Emit .eof for end of module.
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///
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void PIC16DbgInfo::EndModule(Module &M) {
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if (! EmitDebugDirectives) return;
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EmitVarDebugInfo(M);
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if (CurFile != "") O << "\n\t.eof";
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}
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/// EmitCompositeTypeElements - Emit debug information for members of a
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/// composite type.
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///
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void PIC16DbgInfo::EmitCompositeTypeElements (DICompositeType CTy,
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std::string SuffixNo) {
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unsigned long Value = 0;
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DIArray Elements = CTy.getTypeArray();
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for (unsigned i = 0, N = Elements.getNumElements(); i < N; i++) {
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DIDescriptor Element = Elements.getElement(i);
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unsigned short TypeNo = 0;
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bool HasAux = false;
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int ElementAux[PIC16Dbg::AuxSize] = { 0 };
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std::string TagName = "";
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DIDerivedType DITy(Element.getNode());
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unsigned short ElementSize = DITy.getSizeInBits()/8;
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// Get mangleddd name for this structure/union element.
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std::string MangMemName = DITy.getName().str() + SuffixNo;
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PopulateDebugInfo(DITy, TypeNo, HasAux, ElementAux, TagName);
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short Class = 0;
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if( CTy.getTag() == dwarf::DW_TAG_union_type)
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Class = PIC16Dbg::C_MOU;
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else if (CTy.getTag() == dwarf::DW_TAG_structure_type)
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Class = PIC16Dbg::C_MOS;
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EmitSymbol(MangMemName.c_str(), Class, TypeNo, Value);
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if (CTy.getTag() == dwarf::DW_TAG_structure_type)
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Value += ElementSize;
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if (HasAux)
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EmitAuxEntry(MangMemName.c_str(), ElementAux, PIC16Dbg::AuxSize, TagName);
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}
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}
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/// EmitCompositeTypeDecls - Emit composite type declarations like structure
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/// and union declarations.
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///
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void PIC16DbgInfo::EmitCompositeTypeDecls(Module &M) {
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DebugInfoFinder DbgFinder;
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DbgFinder.processModule(M);
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for (DebugInfoFinder::iterator I = DbgFinder.type_begin(),
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E = DbgFinder.type_end(); I != E; ++I) {
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DICompositeType CTy(*I);
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if (CTy.isNull())
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continue;
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if (CTy.getTag() == dwarf::DW_TAG_union_type ||
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CTy.getTag() == dwarf::DW_TAG_structure_type ) {
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// Get the number after llvm.dbg.composite and make UniqueSuffix from
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// it.
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std::string DIVar = CTy.getNode()->getNameStr();
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std::string UniqueSuffix = "." + DIVar.substr(18);
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std::string MangledCTyName = CTy.getName().str() + UniqueSuffix;
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unsigned short size = CTy.getSizeInBits()/8;
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int Aux[PIC16Dbg::AuxSize] = {0};
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// 7th and 8th byte represent size of structure/union.
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Aux[6] = size & 0xff;
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Aux[7] = size >> 8;
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// Emit .def for structure/union tag.
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if( CTy.getTag() == dwarf::DW_TAG_union_type)
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EmitSymbol(MangledCTyName.c_str(), PIC16Dbg::C_UNTAG);
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else if (CTy.getTag() == dwarf::DW_TAG_structure_type)
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EmitSymbol(MangledCTyName.c_str(), PIC16Dbg::C_STRTAG);
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// Emit auxiliary debug information for structure/union tag.
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EmitAuxEntry(MangledCTyName.c_str(), Aux, PIC16Dbg::AuxSize);
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// Emit members.
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EmitCompositeTypeElements (CTy, UniqueSuffix);
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// Emit mangled Symbol for end of structure/union.
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std::string EOSSymbol = ".eos" + UniqueSuffix;
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EmitSymbol(EOSSymbol.c_str(), PIC16Dbg::C_EOS);
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EmitAuxEntry(EOSSymbol.c_str(), Aux, PIC16Dbg::AuxSize,
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MangledCTyName.c_str());
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}
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}
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}
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/// EmitFunctBeginDI - Emit .bf for function.
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///
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void PIC16DbgInfo::EmitFunctBeginDI(const Function *F) {
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std::string FunctName = F->getName();
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if (EmitDebugDirectives) {
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std::string FunctBeginSym = ".bf." + FunctName;
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std::string BlockBeginSym = ".bb." + FunctName;
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int BFAux[PIC16Dbg::AuxSize] = {0};
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BFAux[4] = CurLine;
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BFAux[5] = CurLine >> 8;
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// Emit debug directives for beginning of function.
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EmitSymbol(FunctBeginSym, PIC16Dbg::C_FCN);
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EmitAuxEntry(FunctBeginSym, BFAux, PIC16Dbg::AuxSize);
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EmitSymbol(BlockBeginSym, PIC16Dbg::C_BLOCK);
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EmitAuxEntry(BlockBeginSym, BFAux, PIC16Dbg::AuxSize);
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}
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}
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/// EmitFunctEndDI - Emit .ef for function end.
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///
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void PIC16DbgInfo::EmitFunctEndDI(const Function *F, unsigned Line) {
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std::string FunctName = F->getName();
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if (EmitDebugDirectives) {
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std::string FunctEndSym = ".ef." + FunctName;
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std::string BlockEndSym = ".eb." + FunctName;
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// Emit debug directives for end of function.
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EmitSymbol(BlockEndSym, PIC16Dbg::C_BLOCK);
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int EFAux[PIC16Dbg::AuxSize] = {0};
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// 5th and 6th byte stand for line number.
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EFAux[4] = CurLine;
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EFAux[5] = CurLine >> 8;
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EmitAuxEntry(BlockEndSym, EFAux, PIC16Dbg::AuxSize);
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EmitSymbol(FunctEndSym, PIC16Dbg::C_FCN);
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EmitAuxEntry(FunctEndSym, EFAux, PIC16Dbg::AuxSize);
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}
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}
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/// EmitAuxEntry - Emit Auxiliary debug information.
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///
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void PIC16DbgInfo::EmitAuxEntry(const std::string VarName, int Aux[], int Num,
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std::string TagName) {
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O << "\n\t.dim " << VarName << ", 1" ;
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// TagName is emitted in case of structure/union objects.
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if (TagName != "")
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O << ", " << TagName;
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for (int i = 0; i<Num; i++)
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O << "," << Aux[i];
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}
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/// EmitSymbol - Emit .def for a symbol. Value is offset for the member.
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///
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void PIC16DbgInfo::EmitSymbol(std::string Name, short Class, unsigned short
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Type, unsigned long Value) {
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O << "\n\t" << ".def "<< Name << ", type = " << Type << ", class = "
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<< Class;
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if (Value > 0)
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O << ", value = " << Value;
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}
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/// EmitVarDebugInfo - Emit debug information for all variables.
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///
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void PIC16DbgInfo::EmitVarDebugInfo(Module &M) {
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DebugInfoFinder DbgFinder;
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DbgFinder.processModule(M);
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for (DebugInfoFinder::iterator I = DbgFinder.global_variable_begin(),
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E = DbgFinder.global_variable_end(); I != E; ++I) {
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DIGlobalVariable DIGV(*I);
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DIType Ty = DIGV.getType();
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unsigned short TypeNo = 0;
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bool HasAux = false;
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int Aux[PIC16Dbg::AuxSize] = { 0 };
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std::string TagName = "";
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std::string VarName = DIGV.getName();
|
|
VarName = MAI->getGlobalPrefix() + VarName;
|
|
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(MDNode *CU) {
|
|
// Get the file path from CU.
|
|
DICompileUnit cu(CU);
|
|
std::string DirName = cu.getDirectory();
|
|
std::string FileName = cu.getFilename();
|
|
std::string FilePath = DirName + "/" + 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";
|
|
}
|
|
|