mirror of
https://github.com/c64scene-ar/llvm-6502.git
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de4845c163
representation. This eliminates the 'DILocation' MDNodes for file/line/col tuples from -O0 -g codegen. This remove the old DebugLoc class, making it a typedef for DebugLoc, I'll rename NewDebugLoc next. I didn't update the JIT to use the new apis, so it will continue to work, but be as slow as before. Someone should eventually do this or, better yet, rip out the JIT debug info stuff and build the JIT on top of MC. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100209 91177308-0d34-0410-b5e6-96231b3b80d8
486 lines
16 KiB
C++
486 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 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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SwitchToCU(DL.getScope(MF.getFunction()->getContext()));
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SwitchToLine(DL.getLine(), 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.Verify())
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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] && 0xff);
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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;
|
|
bool HasAux = false;
|
|
int Aux[PIC16Dbg::AuxSize] = { 0 };
|
|
std::string TagName = "";
|
|
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";
|
|
}
|
|
|