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https://github.com/c64scene-ar/llvm-6502.git
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c26f5447e3
This fixes clang generated blocks' variables' debug info. Radar 9279956. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130373 91177308-0d34-0410-b5e6-96231b3b80d8
984 lines
35 KiB
C++
984 lines
35 KiB
C++
//===-- llvm/CodeGen/DwarfCompileUnit.cpp - Dwarf Compile Unit ------------===//
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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 support for writing dwarf compile unit.
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//
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//===----------------------------------------------------------------------===//
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#define DEBUG_TYPE "dwarfdebug"
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#include "DwarfCompileUnit.h"
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#include "DwarfDebug.h"
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#include "llvm/Constants.h"
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#include "llvm/Analysis/DIBuilder.h"
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#include "llvm/Target/TargetData.h"
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#include "llvm/Target/TargetFrameLowering.h"
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#include "llvm/Target/TargetMachine.h"
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#include "llvm/Target/TargetRegisterInfo.h"
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#include "llvm/ADT/APFloat.h"
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#include "llvm/Support/ErrorHandling.h"
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using namespace llvm;
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/// CompileUnit - Compile unit constructor.
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CompileUnit::CompileUnit(unsigned I, DIE *D, AsmPrinter *A, DwarfDebug *DW)
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: ID(I), CUDie(D), Asm(A), DD(DW), IndexTyDie(0) {
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DIEIntegerOne = new (DIEValueAllocator) DIEInteger(1);
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}
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/// ~CompileUnit - Destructor for compile unit.
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CompileUnit::~CompileUnit() {
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for (unsigned j = 0, M = DIEBlocks.size(); j < M; ++j)
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DIEBlocks[j]->~DIEBlock();
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}
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/// createDIEEntry - Creates a new DIEEntry to be a proxy for a debug
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/// information entry.
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DIEEntry *CompileUnit::createDIEEntry(DIE *Entry) {
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DIEEntry *Value = new (DIEValueAllocator) DIEEntry(Entry);
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return Value;
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}
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/// addUInt - Add an unsigned integer attribute data and value.
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///
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void CompileUnit::addUInt(DIE *Die, unsigned Attribute,
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unsigned Form, uint64_t Integer) {
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if (!Form) Form = DIEInteger::BestForm(false, Integer);
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DIEValue *Value = Integer == 1 ?
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DIEIntegerOne : new (DIEValueAllocator) DIEInteger(Integer);
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Die->addValue(Attribute, Form, Value);
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}
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/// addSInt - Add an signed integer attribute data and value.
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///
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void CompileUnit::addSInt(DIE *Die, unsigned Attribute,
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unsigned Form, int64_t Integer) {
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if (!Form) Form = DIEInteger::BestForm(true, Integer);
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DIEValue *Value = new (DIEValueAllocator) DIEInteger(Integer);
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Die->addValue(Attribute, Form, Value);
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}
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/// addString - Add a string attribute data and value. DIEString only
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/// keeps string reference.
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void CompileUnit::addString(DIE *Die, unsigned Attribute, unsigned Form,
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StringRef String) {
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DIEValue *Value = new (DIEValueAllocator) DIEString(String);
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Die->addValue(Attribute, Form, Value);
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}
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/// addLabel - Add a Dwarf label attribute data and value.
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///
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void CompileUnit::addLabel(DIE *Die, unsigned Attribute, unsigned Form,
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const MCSymbol *Label) {
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DIEValue *Value = new (DIEValueAllocator) DIELabel(Label);
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Die->addValue(Attribute, Form, Value);
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}
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/// addDelta - Add a label delta attribute data and value.
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///
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void CompileUnit::addDelta(DIE *Die, unsigned Attribute, unsigned Form,
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const MCSymbol *Hi, const MCSymbol *Lo) {
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DIEValue *Value = new (DIEValueAllocator) DIEDelta(Hi, Lo);
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Die->addValue(Attribute, Form, Value);
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}
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/// addDIEEntry - Add a DIE attribute data and value.
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///
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void CompileUnit::addDIEEntry(DIE *Die, unsigned Attribute, unsigned Form,
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DIE *Entry) {
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Die->addValue(Attribute, Form, createDIEEntry(Entry));
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}
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/// addBlock - Add block data.
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///
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void CompileUnit::addBlock(DIE *Die, unsigned Attribute, unsigned Form,
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DIEBlock *Block) {
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Block->ComputeSize(Asm);
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DIEBlocks.push_back(Block); // Memoize so we can call the destructor later on.
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Die->addValue(Attribute, Block->BestForm(), Block);
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}
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/// addSourceLine - Add location information to specified debug information
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/// entry.
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void CompileUnit::addSourceLine(DIE *Die, DIVariable V) {
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// Verify variable.
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if (!V.Verify())
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return;
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unsigned Line = V.getLineNumber();
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if (Line == 0)
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return;
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unsigned FileID = DD->GetOrCreateSourceID(V.getContext().getFilename(),
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V.getContext().getDirectory());
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assert(FileID && "Invalid file id");
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addUInt(Die, dwarf::DW_AT_decl_file, 0, FileID);
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addUInt(Die, dwarf::DW_AT_decl_line, 0, Line);
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}
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/// addSourceLine - Add location information to specified debug information
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/// entry.
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void CompileUnit::addSourceLine(DIE *Die, DIGlobalVariable G) {
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// Verify global variable.
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if (!G.Verify())
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return;
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unsigned Line = G.getLineNumber();
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if (Line == 0)
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return;
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unsigned FileID = DD->GetOrCreateSourceID(G.getContext().getFilename(),
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G.getContext().getDirectory());
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assert(FileID && "Invalid file id");
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addUInt(Die, dwarf::DW_AT_decl_file, 0, FileID);
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addUInt(Die, dwarf::DW_AT_decl_line, 0, Line);
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}
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/// addSourceLine - Add location information to specified debug information
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/// entry.
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void CompileUnit::addSourceLine(DIE *Die, DISubprogram SP) {
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// Verify subprogram.
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if (!SP.Verify())
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return;
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// If the line number is 0, don't add it.
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if (SP.getLineNumber() == 0)
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return;
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unsigned Line = SP.getLineNumber();
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if (!SP.getContext().Verify())
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return;
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unsigned FileID = DD->GetOrCreateSourceID(SP.getFilename(), SP.getDirectory());
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assert(FileID && "Invalid file id");
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addUInt(Die, dwarf::DW_AT_decl_file, 0, FileID);
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addUInt(Die, dwarf::DW_AT_decl_line, 0, Line);
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}
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/// addSourceLine - Add location information to specified debug information
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/// entry.
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void CompileUnit::addSourceLine(DIE *Die, DIType Ty) {
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// Verify type.
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if (!Ty.Verify())
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return;
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unsigned Line = Ty.getLineNumber();
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if (Line == 0 || !Ty.getContext().Verify())
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return;
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unsigned FileID = DD->GetOrCreateSourceID(Ty.getFilename(), Ty.getDirectory());
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assert(FileID && "Invalid file id");
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addUInt(Die, dwarf::DW_AT_decl_file, 0, FileID);
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addUInt(Die, dwarf::DW_AT_decl_line, 0, Line);
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}
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/// addSourceLine - Add location information to specified debug information
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/// entry.
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void CompileUnit::addSourceLine(DIE *Die, DINameSpace NS) {
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// Verify namespace.
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if (!NS.Verify())
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return;
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unsigned Line = NS.getLineNumber();
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if (Line == 0)
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return;
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StringRef FN = NS.getFilename();
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unsigned FileID = DD->GetOrCreateSourceID(FN, NS.getDirectory());
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assert(FileID && "Invalid file id");
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addUInt(Die, dwarf::DW_AT_decl_file, 0, FileID);
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addUInt(Die, dwarf::DW_AT_decl_line, 0, Line);
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}
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/// addVariableAddress - Add DW_AT_location attribute for a
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/// DbgVariable based on provided MachineLocation.
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void CompileUnit::addVariableAddress(DbgVariable *&DV, DIE *Die,
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MachineLocation Location) {
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if (DV->variableHasComplexAddress())
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addComplexAddress(DV, Die, dwarf::DW_AT_location, Location);
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else if (DV->isBlockByrefVariable())
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addBlockByrefAddress(DV, Die, dwarf::DW_AT_location, Location);
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else
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addAddress(Die, dwarf::DW_AT_location, Location);
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}
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/// addRegisterOp - Add register operand.
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void CompileUnit::addRegisterOp(DIE *TheDie, unsigned Reg) {
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const TargetRegisterInfo *RI = Asm->TM.getRegisterInfo();
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unsigned DWReg = RI->getDwarfRegNum(Reg, false);
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if (DWReg < 32)
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addUInt(TheDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_reg0 + DWReg);
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else {
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addUInt(TheDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_regx);
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addUInt(TheDie, 0, dwarf::DW_FORM_udata, DWReg);
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}
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}
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/// addRegisterOffset - Add register offset.
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void CompileUnit::addRegisterOffset(DIE *TheDie, unsigned Reg,
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int64_t Offset) {
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const TargetRegisterInfo *RI = Asm->TM.getRegisterInfo();
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unsigned DWReg = RI->getDwarfRegNum(Reg, false);
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const TargetRegisterInfo *TRI = Asm->TM.getRegisterInfo();
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if (Reg == TRI->getFrameRegister(*Asm->MF))
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// If variable offset is based in frame register then use fbreg.
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addUInt(TheDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_fbreg);
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else if (DWReg < 32)
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addUInt(TheDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_breg0 + DWReg);
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else {
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addUInt(TheDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_bregx);
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addUInt(TheDie, 0, dwarf::DW_FORM_udata, DWReg);
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}
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addSInt(TheDie, 0, dwarf::DW_FORM_sdata, Offset);
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}
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/// addAddress - Add an address attribute to a die based on the location
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/// provided.
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void CompileUnit::addAddress(DIE *Die, unsigned Attribute,
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const MachineLocation &Location) {
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DIEBlock *Block = new (DIEValueAllocator) DIEBlock();
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if (Location.isReg())
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addRegisterOp(Block, Location.getReg());
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else
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addRegisterOffset(Block, Location.getReg(), Location.getOffset());
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// Now attach the location information to the DIE.
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addBlock(Die, Attribute, 0, Block);
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}
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/// addComplexAddress - Start with the address based on the location provided,
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/// and generate the DWARF information necessary to find the actual variable
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/// given the extra address information encoded in the DIVariable, starting from
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/// the starting location. Add the DWARF information to the die.
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///
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void CompileUnit::addComplexAddress(DbgVariable *&DV, DIE *Die,
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unsigned Attribute,
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const MachineLocation &Location) {
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DIEBlock *Block = new (DIEValueAllocator) DIEBlock();
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unsigned N = DV->getNumAddrElements();
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unsigned i = 0;
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if (Location.isReg()) {
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if (N >= 2 && DV->getAddrElement(0) == DIBuilder::OpPlus) {
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// If first address element is OpPlus then emit
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// DW_OP_breg + Offset instead of DW_OP_reg + Offset.
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addRegisterOffset(Block, Location.getReg(), DV->getAddrElement(1));
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i = 2;
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} else
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addRegisterOp(Block, Location.getReg());
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}
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else
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addRegisterOffset(Block, Location.getReg(), Location.getOffset());
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for (;i < N; ++i) {
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uint64_t Element = DV->getAddrElement(i);
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if (Element == DIBuilder::OpPlus) {
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addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_plus_uconst);
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addUInt(Block, 0, dwarf::DW_FORM_udata, DV->getAddrElement(++i));
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} else if (Element == DIBuilder::OpDeref) {
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addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_deref);
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} else llvm_unreachable("unknown DIBuilder Opcode");
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}
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// Now attach the location information to the DIE.
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addBlock(Die, Attribute, 0, Block);
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}
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/* Byref variables, in Blocks, are declared by the programmer as "SomeType
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VarName;", but the compiler creates a __Block_byref_x_VarName struct, and
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gives the variable VarName either the struct, or a pointer to the struct, as
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its type. This is necessary for various behind-the-scenes things the
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compiler needs to do with by-reference variables in Blocks.
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However, as far as the original *programmer* is concerned, the variable
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should still have type 'SomeType', as originally declared.
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The function getBlockByrefType dives into the __Block_byref_x_VarName
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struct to find the original type of the variable, which is then assigned to
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the variable's Debug Information Entry as its real type. So far, so good.
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However now the debugger will expect the variable VarName to have the type
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SomeType. So we need the location attribute for the variable to be an
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expression that explains to the debugger how to navigate through the
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pointers and struct to find the actual variable of type SomeType.
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The following function does just that. We start by getting
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the "normal" location for the variable. This will be the location
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of either the struct __Block_byref_x_VarName or the pointer to the
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struct __Block_byref_x_VarName.
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The struct will look something like:
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struct __Block_byref_x_VarName {
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... <various fields>
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struct __Block_byref_x_VarName *forwarding;
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... <various other fields>
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SomeType VarName;
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... <maybe more fields>
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};
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If we are given the struct directly (as our starting point) we
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need to tell the debugger to:
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1). Add the offset of the forwarding field.
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2). Follow that pointer to get the real __Block_byref_x_VarName
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struct to use (the real one may have been copied onto the heap).
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3). Add the offset for the field VarName, to find the actual variable.
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If we started with a pointer to the struct, then we need to
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dereference that pointer first, before the other steps.
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Translating this into DWARF ops, we will need to append the following
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to the current location description for the variable:
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DW_OP_deref -- optional, if we start with a pointer
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DW_OP_plus_uconst <forward_fld_offset>
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DW_OP_deref
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DW_OP_plus_uconst <varName_fld_offset>
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That is what this function does. */
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/// addBlockByrefAddress - Start with the address based on the location
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/// provided, and generate the DWARF information necessary to find the
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/// actual Block variable (navigating the Block struct) based on the
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/// starting location. Add the DWARF information to the die. For
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/// more information, read large comment just above here.
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///
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void CompileUnit::addBlockByrefAddress(DbgVariable *&DV, DIE *Die,
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unsigned Attribute,
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const MachineLocation &Location) {
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DIType Ty = DV->getType();
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DIType TmpTy = Ty;
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unsigned Tag = Ty.getTag();
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bool isPointer = false;
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StringRef varName = DV->getName();
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if (Tag == dwarf::DW_TAG_pointer_type) {
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DIDerivedType DTy = DIDerivedType(Ty);
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TmpTy = DTy.getTypeDerivedFrom();
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isPointer = true;
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}
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DICompositeType blockStruct = DICompositeType(TmpTy);
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// Find the __forwarding field and the variable field in the __Block_byref
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// struct.
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DIArray Fields = blockStruct.getTypeArray();
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DIDescriptor varField = DIDescriptor();
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DIDescriptor forwardingField = DIDescriptor();
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for (unsigned i = 0, N = Fields.getNumElements(); i < N; ++i) {
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DIDescriptor Element = Fields.getElement(i);
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DIDerivedType DT = DIDerivedType(Element);
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StringRef fieldName = DT.getName();
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if (fieldName == "__forwarding")
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forwardingField = Element;
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else if (fieldName == varName)
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varField = Element;
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}
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// Get the offsets for the forwarding field and the variable field.
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unsigned forwardingFieldOffset =
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DIDerivedType(forwardingField).getOffsetInBits() >> 3;
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unsigned varFieldOffset =
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DIDerivedType(varField).getOffsetInBits() >> 3;
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// Decode the original location, and use that as the start of the byref
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// variable's location.
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const TargetRegisterInfo *RI = Asm->TM.getRegisterInfo();
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unsigned Reg = RI->getDwarfRegNum(Location.getReg(), false);
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DIEBlock *Block = new (DIEValueAllocator) DIEBlock();
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if (Location.isReg()) {
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if (Reg < 32)
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addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_reg0 + Reg);
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else {
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addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_regx);
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addUInt(Block, 0, dwarf::DW_FORM_udata, Reg);
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}
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} else {
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if (Reg < 32)
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addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_breg0 + Reg);
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else {
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addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_bregx);
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addUInt(Block, 0, dwarf::DW_FORM_udata, Reg);
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}
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addUInt(Block, 0, dwarf::DW_FORM_sdata, Location.getOffset());
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}
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// If we started with a pointer to the __Block_byref... struct, then
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// the first thing we need to do is dereference the pointer (DW_OP_deref).
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if (isPointer)
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addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_deref);
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// Next add the offset for the '__forwarding' field:
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// DW_OP_plus_uconst ForwardingFieldOffset. Note there's no point in
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// adding the offset if it's 0.
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if (forwardingFieldOffset > 0) {
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addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_plus_uconst);
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addUInt(Block, 0, dwarf::DW_FORM_udata, forwardingFieldOffset);
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}
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// Now dereference the __forwarding field to get to the real __Block_byref
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// struct: DW_OP_deref.
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addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_deref);
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// Now that we've got the real __Block_byref... struct, add the offset
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// for the variable's field to get to the location of the actual variable:
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// DW_OP_plus_uconst varFieldOffset. Again, don't add if it's 0.
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if (varFieldOffset > 0) {
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addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_plus_uconst);
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addUInt(Block, 0, dwarf::DW_FORM_udata, varFieldOffset);
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}
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// Now attach the location information to the DIE.
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addBlock(Die, Attribute, 0, Block);
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}
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/// addConstantValue - Add constant value entry in variable DIE.
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bool CompileUnit::addConstantValue(DIE *Die, const MachineOperand &MO) {
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assert (MO.isImm() && "Invalid machine operand!");
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DIEBlock *Block = new (DIEValueAllocator) DIEBlock();
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unsigned Imm = MO.getImm();
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addUInt(Block, 0, dwarf::DW_FORM_udata, Imm);
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addBlock(Die, dwarf::DW_AT_const_value, 0, Block);
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return true;
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}
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/// addConstantFPValue - Add constant value entry in variable DIE.
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bool CompileUnit::addConstantFPValue(DIE *Die, const MachineOperand &MO) {
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assert (MO.isFPImm() && "Invalid machine operand!");
|
|
DIEBlock *Block = new (DIEValueAllocator) DIEBlock();
|
|
APFloat FPImm = MO.getFPImm()->getValueAPF();
|
|
|
|
// Get the raw data form of the floating point.
|
|
const APInt FltVal = FPImm.bitcastToAPInt();
|
|
const char *FltPtr = (const char*)FltVal.getRawData();
|
|
|
|
int NumBytes = FltVal.getBitWidth() / 8; // 8 bits per byte.
|
|
bool LittleEndian = Asm->getTargetData().isLittleEndian();
|
|
int Incr = (LittleEndian ? 1 : -1);
|
|
int Start = (LittleEndian ? 0 : NumBytes - 1);
|
|
int Stop = (LittleEndian ? NumBytes : -1);
|
|
|
|
// Output the constant to DWARF one byte at a time.
|
|
for (; Start != Stop; Start += Incr)
|
|
addUInt(Block, 0, dwarf::DW_FORM_data1,
|
|
(unsigned char)0xFF & FltPtr[Start]);
|
|
|
|
addBlock(Die, dwarf::DW_AT_const_value, 0, Block);
|
|
return true;
|
|
}
|
|
|
|
/// addConstantValue - Add constant value entry in variable DIE.
|
|
bool CompileUnit::addConstantValue(DIE *Die, ConstantInt *CI,
|
|
bool Unsigned) {
|
|
if (CI->getBitWidth() <= 64) {
|
|
if (Unsigned)
|
|
addUInt(Die, dwarf::DW_AT_const_value, dwarf::DW_FORM_udata,
|
|
CI->getZExtValue());
|
|
else
|
|
addSInt(Die, dwarf::DW_AT_const_value, dwarf::DW_FORM_sdata,
|
|
CI->getSExtValue());
|
|
return true;
|
|
}
|
|
|
|
DIEBlock *Block = new (DIEValueAllocator) DIEBlock();
|
|
|
|
// Get the raw data form of the large APInt.
|
|
const APInt Val = CI->getValue();
|
|
const char *Ptr = (const char*)Val.getRawData();
|
|
|
|
int NumBytes = Val.getBitWidth() / 8; // 8 bits per byte.
|
|
bool LittleEndian = Asm->getTargetData().isLittleEndian();
|
|
int Incr = (LittleEndian ? 1 : -1);
|
|
int Start = (LittleEndian ? 0 : NumBytes - 1);
|
|
int Stop = (LittleEndian ? NumBytes : -1);
|
|
|
|
// Output the constant to DWARF one byte at a time.
|
|
for (; Start != Stop; Start += Incr)
|
|
addUInt(Block, 0, dwarf::DW_FORM_data1,
|
|
(unsigned char)0xFF & Ptr[Start]);
|
|
|
|
addBlock(Die, dwarf::DW_AT_const_value, 0, Block);
|
|
return true;
|
|
}
|
|
|
|
/// addTemplateParams - Add template parameters in buffer.
|
|
void CompileUnit::addTemplateParams(DIE &Buffer, DIArray TParams) {
|
|
// Add template parameters.
|
|
for (unsigned i = 0, e = TParams.getNumElements(); i != e; ++i) {
|
|
DIDescriptor Element = TParams.getElement(i);
|
|
if (Element.isTemplateTypeParameter())
|
|
Buffer.addChild(getOrCreateTemplateTypeParameterDIE(
|
|
DITemplateTypeParameter(Element)));
|
|
else if (Element.isTemplateValueParameter())
|
|
Buffer.addChild(getOrCreateTemplateValueParameterDIE(
|
|
DITemplateValueParameter(Element)));
|
|
}
|
|
|
|
}
|
|
/// addToContextOwner - Add Die into the list of its context owner's children.
|
|
void CompileUnit::addToContextOwner(DIE *Die, DIDescriptor Context) {
|
|
if (Context.isType()) {
|
|
DIE *ContextDIE = getOrCreateTypeDIE(DIType(Context));
|
|
ContextDIE->addChild(Die);
|
|
} else if (Context.isNameSpace()) {
|
|
DIE *ContextDIE = getOrCreateNameSpace(DINameSpace(Context));
|
|
ContextDIE->addChild(Die);
|
|
} else if (Context.isSubprogram()) {
|
|
DIE *ContextDIE = DD->createSubprogramDIE(DISubprogram(Context));
|
|
ContextDIE->addChild(Die);
|
|
} else if (DIE *ContextDIE = getDIE(Context))
|
|
ContextDIE->addChild(Die);
|
|
else
|
|
addDie(Die);
|
|
}
|
|
|
|
/// getOrCreateTypeDIE - Find existing DIE or create new DIE for the
|
|
/// given DIType.
|
|
DIE *CompileUnit::getOrCreateTypeDIE(DIType Ty) {
|
|
DIE *TyDIE = getDIE(Ty);
|
|
if (TyDIE)
|
|
return TyDIE;
|
|
|
|
// Create new type.
|
|
TyDIE = new DIE(dwarf::DW_TAG_base_type);
|
|
insertDIE(Ty, TyDIE);
|
|
if (Ty.isBasicType())
|
|
constructTypeDIE(*TyDIE, DIBasicType(Ty));
|
|
else if (Ty.isCompositeType())
|
|
constructTypeDIE(*TyDIE, DICompositeType(Ty));
|
|
else {
|
|
assert(Ty.isDerivedType() && "Unknown kind of DIType");
|
|
constructTypeDIE(*TyDIE, DIDerivedType(Ty));
|
|
}
|
|
|
|
addToContextOwner(TyDIE, Ty.getContext());
|
|
return TyDIE;
|
|
}
|
|
|
|
/// addType - Add a new type attribute to the specified entity.
|
|
void CompileUnit::addType(DIE *Entity, DIType Ty) {
|
|
if (!Ty.Verify())
|
|
return;
|
|
|
|
// Check for pre-existence.
|
|
DIEEntry *Entry = getDIEEntry(Ty);
|
|
// If it exists then use the existing value.
|
|
if (Entry) {
|
|
Entity->addValue(dwarf::DW_AT_type, dwarf::DW_FORM_ref4, Entry);
|
|
return;
|
|
}
|
|
|
|
// Construct type.
|
|
DIE *Buffer = getOrCreateTypeDIE(Ty);
|
|
|
|
// Set up proxy.
|
|
Entry = createDIEEntry(Buffer);
|
|
insertDIEEntry(Ty, Entry);
|
|
|
|
Entity->addValue(dwarf::DW_AT_type, dwarf::DW_FORM_ref4, Entry);
|
|
}
|
|
|
|
/// constructTypeDIE - Construct basic type die from DIBasicType.
|
|
void CompileUnit::constructTypeDIE(DIE &Buffer, DIBasicType BTy) {
|
|
// Get core information.
|
|
StringRef Name = BTy.getName();
|
|
Buffer.setTag(dwarf::DW_TAG_base_type);
|
|
addUInt(&Buffer, dwarf::DW_AT_encoding, dwarf::DW_FORM_data1,
|
|
BTy.getEncoding());
|
|
|
|
// Add name if not anonymous or intermediate type.
|
|
if (!Name.empty())
|
|
addString(&Buffer, dwarf::DW_AT_name, dwarf::DW_FORM_string, Name);
|
|
uint64_t Size = BTy.getSizeInBits() >> 3;
|
|
addUInt(&Buffer, dwarf::DW_AT_byte_size, 0, Size);
|
|
}
|
|
|
|
/// constructTypeDIE - Construct derived type die from DIDerivedType.
|
|
void CompileUnit::constructTypeDIE(DIE &Buffer, DIDerivedType DTy) {
|
|
// Get core information.
|
|
StringRef Name = DTy.getName();
|
|
uint64_t Size = DTy.getSizeInBits() >> 3;
|
|
unsigned Tag = DTy.getTag();
|
|
|
|
// FIXME - Workaround for templates.
|
|
if (Tag == dwarf::DW_TAG_inheritance) Tag = dwarf::DW_TAG_reference_type;
|
|
|
|
Buffer.setTag(Tag);
|
|
|
|
// Map to main type, void will not have a type.
|
|
DIType FromTy = DTy.getTypeDerivedFrom();
|
|
addType(&Buffer, FromTy);
|
|
|
|
// Add name if not anonymous or intermediate type.
|
|
if (!Name.empty())
|
|
addString(&Buffer, dwarf::DW_AT_name, dwarf::DW_FORM_string, Name);
|
|
|
|
// Add size if non-zero (derived types might be zero-sized.)
|
|
if (Size)
|
|
addUInt(&Buffer, dwarf::DW_AT_byte_size, 0, Size);
|
|
|
|
// Add source line info if available and TyDesc is not a forward declaration.
|
|
if (!DTy.isForwardDecl())
|
|
addSourceLine(&Buffer, DTy);
|
|
}
|
|
|
|
/// constructTypeDIE - Construct type DIE from DICompositeType.
|
|
void CompileUnit::constructTypeDIE(DIE &Buffer, DICompositeType CTy) {
|
|
// Get core information.
|
|
StringRef Name = CTy.getName();
|
|
|
|
uint64_t Size = CTy.getSizeInBits() >> 3;
|
|
unsigned Tag = CTy.getTag();
|
|
Buffer.setTag(Tag);
|
|
|
|
switch (Tag) {
|
|
case dwarf::DW_TAG_vector_type:
|
|
case dwarf::DW_TAG_array_type:
|
|
constructArrayTypeDIE(Buffer, &CTy);
|
|
break;
|
|
case dwarf::DW_TAG_enumeration_type: {
|
|
DIArray Elements = CTy.getTypeArray();
|
|
|
|
// Add enumerators to enumeration type.
|
|
for (unsigned i = 0, N = Elements.getNumElements(); i < N; ++i) {
|
|
DIE *ElemDie = NULL;
|
|
DIDescriptor Enum(Elements.getElement(i));
|
|
if (Enum.isEnumerator()) {
|
|
ElemDie = constructEnumTypeDIE(DIEnumerator(Enum));
|
|
Buffer.addChild(ElemDie);
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
case dwarf::DW_TAG_subroutine_type: {
|
|
// Add return type.
|
|
DIArray Elements = CTy.getTypeArray();
|
|
DIDescriptor RTy = Elements.getElement(0);
|
|
addType(&Buffer, DIType(RTy));
|
|
|
|
bool isPrototyped = true;
|
|
// Add arguments.
|
|
for (unsigned i = 1, N = Elements.getNumElements(); i < N; ++i) {
|
|
DIDescriptor Ty = Elements.getElement(i);
|
|
if (Ty.isUnspecifiedParameter()) {
|
|
DIE *Arg = new DIE(dwarf::DW_TAG_unspecified_parameters);
|
|
Buffer.addChild(Arg);
|
|
isPrototyped = false;
|
|
} else {
|
|
DIE *Arg = new DIE(dwarf::DW_TAG_formal_parameter);
|
|
addType(Arg, DIType(Ty));
|
|
Buffer.addChild(Arg);
|
|
}
|
|
}
|
|
// Add prototype flag.
|
|
if (isPrototyped)
|
|
addUInt(&Buffer, dwarf::DW_AT_prototyped, dwarf::DW_FORM_flag, 1);
|
|
}
|
|
break;
|
|
case dwarf::DW_TAG_structure_type:
|
|
case dwarf::DW_TAG_union_type:
|
|
case dwarf::DW_TAG_class_type: {
|
|
// Add elements to structure type.
|
|
DIArray Elements = CTy.getTypeArray();
|
|
|
|
// A forward struct declared type may not have elements available.
|
|
unsigned N = Elements.getNumElements();
|
|
if (N == 0)
|
|
break;
|
|
|
|
// Add elements to structure type.
|
|
for (unsigned i = 0; i < N; ++i) {
|
|
DIDescriptor Element = Elements.getElement(i);
|
|
DIE *ElemDie = NULL;
|
|
if (Element.isSubprogram()) {
|
|
DISubprogram SP(Element);
|
|
ElemDie = DD->createSubprogramDIE(DISubprogram(Element));
|
|
if (SP.isProtected())
|
|
addUInt(ElemDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_flag,
|
|
dwarf::DW_ACCESS_protected);
|
|
else if (SP.isPrivate())
|
|
addUInt(ElemDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_flag,
|
|
dwarf::DW_ACCESS_private);
|
|
else
|
|
addUInt(ElemDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_flag,
|
|
dwarf::DW_ACCESS_public);
|
|
if (SP.isExplicit())
|
|
addUInt(ElemDie, dwarf::DW_AT_explicit, dwarf::DW_FORM_flag, 1);
|
|
}
|
|
else if (Element.isVariable()) {
|
|
DIVariable DV(Element);
|
|
ElemDie = new DIE(dwarf::DW_TAG_variable);
|
|
addString(ElemDie, dwarf::DW_AT_name, dwarf::DW_FORM_string,
|
|
DV.getName());
|
|
addType(ElemDie, DV.getType());
|
|
addUInt(ElemDie, dwarf::DW_AT_declaration, dwarf::DW_FORM_flag, 1);
|
|
addUInt(ElemDie, dwarf::DW_AT_external, dwarf::DW_FORM_flag, 1);
|
|
addSourceLine(ElemDie, DV);
|
|
} else if (Element.isDerivedType())
|
|
ElemDie = createMemberDIE(DIDerivedType(Element));
|
|
else
|
|
continue;
|
|
Buffer.addChild(ElemDie);
|
|
}
|
|
|
|
if (CTy.isAppleBlockExtension())
|
|
addUInt(&Buffer, dwarf::DW_AT_APPLE_block, dwarf::DW_FORM_flag, 1);
|
|
|
|
unsigned RLang = CTy.getRunTimeLang();
|
|
if (RLang)
|
|
addUInt(&Buffer, dwarf::DW_AT_APPLE_runtime_class,
|
|
dwarf::DW_FORM_data1, RLang);
|
|
|
|
DICompositeType ContainingType = CTy.getContainingType();
|
|
if (DIDescriptor(ContainingType).isCompositeType())
|
|
addDIEEntry(&Buffer, dwarf::DW_AT_containing_type, dwarf::DW_FORM_ref4,
|
|
getOrCreateTypeDIE(DIType(ContainingType)));
|
|
else {
|
|
DIDescriptor Context = CTy.getContext();
|
|
addToContextOwner(&Buffer, Context);
|
|
}
|
|
|
|
if (Tag == dwarf::DW_TAG_class_type)
|
|
addTemplateParams(Buffer, CTy.getTemplateParams());
|
|
|
|
break;
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
|
|
// Add name if not anonymous or intermediate type.
|
|
if (!Name.empty())
|
|
addString(&Buffer, dwarf::DW_AT_name, dwarf::DW_FORM_string, Name);
|
|
|
|
if (Tag == dwarf::DW_TAG_enumeration_type || Tag == dwarf::DW_TAG_class_type
|
|
|| Tag == dwarf::DW_TAG_structure_type || Tag == dwarf::DW_TAG_union_type)
|
|
{
|
|
// Add size if non-zero (derived types might be zero-sized.)
|
|
if (Size)
|
|
addUInt(&Buffer, dwarf::DW_AT_byte_size, 0, Size);
|
|
else {
|
|
// Add zero size if it is not a forward declaration.
|
|
if (CTy.isForwardDecl())
|
|
addUInt(&Buffer, dwarf::DW_AT_declaration, dwarf::DW_FORM_flag, 1);
|
|
else
|
|
addUInt(&Buffer, dwarf::DW_AT_byte_size, 0, 0);
|
|
}
|
|
|
|
// Add source line info if available.
|
|
if (!CTy.isForwardDecl())
|
|
addSourceLine(&Buffer, CTy);
|
|
}
|
|
}
|
|
|
|
/// getOrCreateTemplateTypeParameterDIE - Find existing DIE or create new DIE
|
|
/// for the given DITemplateTypeParameter.
|
|
DIE *
|
|
CompileUnit::getOrCreateTemplateTypeParameterDIE(DITemplateTypeParameter TP) {
|
|
DIE *ParamDIE = getDIE(TP);
|
|
if (ParamDIE)
|
|
return ParamDIE;
|
|
|
|
ParamDIE = new DIE(dwarf::DW_TAG_template_type_parameter);
|
|
addType(ParamDIE, TP.getType());
|
|
addString(ParamDIE, dwarf::DW_AT_name, dwarf::DW_FORM_string, TP.getName());
|
|
return ParamDIE;
|
|
}
|
|
|
|
/// getOrCreateTemplateValueParameterDIE - Find existing DIE or create new DIE
|
|
/// for the given DITemplateValueParameter.
|
|
DIE *
|
|
CompileUnit::getOrCreateTemplateValueParameterDIE(DITemplateValueParameter TPV) {
|
|
DIE *ParamDIE = getDIE(TPV);
|
|
if (ParamDIE)
|
|
return ParamDIE;
|
|
|
|
ParamDIE = new DIE(dwarf::DW_TAG_template_value_parameter);
|
|
addType(ParamDIE, TPV.getType());
|
|
if (!TPV.getName().empty())
|
|
addString(ParamDIE, dwarf::DW_AT_name, dwarf::DW_FORM_string, TPV.getName());
|
|
addUInt(ParamDIE, dwarf::DW_AT_const_value, dwarf::DW_FORM_udata,
|
|
TPV.getValue());
|
|
return ParamDIE;
|
|
}
|
|
|
|
/// constructSubrangeDIE - Construct subrange DIE from DISubrange.
|
|
void CompileUnit::constructSubrangeDIE(DIE &Buffer, DISubrange SR, DIE *IndexTy){
|
|
DIE *DW_Subrange = new DIE(dwarf::DW_TAG_subrange_type);
|
|
addDIEEntry(DW_Subrange, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, IndexTy);
|
|
int64_t L = SR.getLo();
|
|
int64_t H = SR.getHi();
|
|
|
|
// The L value defines the lower bounds which is typically zero for C/C++. The
|
|
// H value is the upper bounds. Values are 64 bit. H - L + 1 is the size
|
|
// of the array. If L > H then do not emit DW_AT_lower_bound and
|
|
// DW_AT_upper_bound attributes. If L is zero and H is also zero then the
|
|
// array has one element and in such case do not emit lower bound.
|
|
|
|
if (L > H) {
|
|
Buffer.addChild(DW_Subrange);
|
|
return;
|
|
}
|
|
if (L)
|
|
addSInt(DW_Subrange, dwarf::DW_AT_lower_bound, 0, L);
|
|
addSInt(DW_Subrange, dwarf::DW_AT_upper_bound, 0, H);
|
|
Buffer.addChild(DW_Subrange);
|
|
}
|
|
|
|
/// constructArrayTypeDIE - Construct array type DIE from DICompositeType.
|
|
void CompileUnit::constructArrayTypeDIE(DIE &Buffer,
|
|
DICompositeType *CTy) {
|
|
Buffer.setTag(dwarf::DW_TAG_array_type);
|
|
if (CTy->getTag() == dwarf::DW_TAG_vector_type)
|
|
addUInt(&Buffer, dwarf::DW_AT_GNU_vector, dwarf::DW_FORM_flag, 1);
|
|
|
|
// Emit derived type.
|
|
addType(&Buffer, CTy->getTypeDerivedFrom());
|
|
DIArray Elements = CTy->getTypeArray();
|
|
|
|
// Get an anonymous type for index type.
|
|
DIE *IdxTy = getIndexTyDie();
|
|
if (!IdxTy) {
|
|
// Construct an anonymous type for index type.
|
|
IdxTy = new DIE(dwarf::DW_TAG_base_type);
|
|
addUInt(IdxTy, dwarf::DW_AT_byte_size, 0, sizeof(int32_t));
|
|
addUInt(IdxTy, dwarf::DW_AT_encoding, dwarf::DW_FORM_data1,
|
|
dwarf::DW_ATE_signed);
|
|
addDie(IdxTy);
|
|
setIndexTyDie(IdxTy);
|
|
}
|
|
|
|
// Add subranges to array type.
|
|
for (unsigned i = 0, N = Elements.getNumElements(); i < N; ++i) {
|
|
DIDescriptor Element = Elements.getElement(i);
|
|
if (Element.getTag() == dwarf::DW_TAG_subrange_type)
|
|
constructSubrangeDIE(Buffer, DISubrange(Element), IdxTy);
|
|
}
|
|
}
|
|
|
|
/// constructEnumTypeDIE - Construct enum type DIE from DIEnumerator.
|
|
DIE *CompileUnit::constructEnumTypeDIE(DIEnumerator ETy) {
|
|
DIE *Enumerator = new DIE(dwarf::DW_TAG_enumerator);
|
|
StringRef Name = ETy.getName();
|
|
addString(Enumerator, dwarf::DW_AT_name, dwarf::DW_FORM_string, Name);
|
|
int64_t Value = ETy.getEnumValue();
|
|
addSInt(Enumerator, dwarf::DW_AT_const_value, dwarf::DW_FORM_sdata, Value);
|
|
return Enumerator;
|
|
}
|
|
|
|
/// createMemberDIE - Create new member DIE.
|
|
DIE *CompileUnit::createMemberDIE(DIDerivedType DT) {
|
|
DIE *MemberDie = new DIE(DT.getTag());
|
|
StringRef Name = DT.getName();
|
|
if (!Name.empty())
|
|
addString(MemberDie, dwarf::DW_AT_name, dwarf::DW_FORM_string, Name);
|
|
|
|
addType(MemberDie, DT.getTypeDerivedFrom());
|
|
|
|
addSourceLine(MemberDie, DT);
|
|
|
|
DIEBlock *MemLocationDie = new (DIEValueAllocator) DIEBlock();
|
|
addUInt(MemLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_plus_uconst);
|
|
|
|
uint64_t Size = DT.getSizeInBits();
|
|
uint64_t FieldSize = DT.getOriginalTypeSize();
|
|
|
|
if (Size != FieldSize) {
|
|
// Handle bitfield.
|
|
addUInt(MemberDie, dwarf::DW_AT_byte_size, 0, DT.getOriginalTypeSize()>>3);
|
|
addUInt(MemberDie, dwarf::DW_AT_bit_size, 0, DT.getSizeInBits());
|
|
|
|
uint64_t Offset = DT.getOffsetInBits();
|
|
uint64_t AlignMask = ~(DT.getAlignInBits() - 1);
|
|
uint64_t HiMark = (Offset + FieldSize) & AlignMask;
|
|
uint64_t FieldOffset = (HiMark - FieldSize);
|
|
Offset -= FieldOffset;
|
|
|
|
// Maybe we need to work from the other end.
|
|
if (Asm->getTargetData().isLittleEndian())
|
|
Offset = FieldSize - (Offset + Size);
|
|
addUInt(MemberDie, dwarf::DW_AT_bit_offset, 0, Offset);
|
|
|
|
// Here WD_AT_data_member_location points to the anonymous
|
|
// field that includes this bit field.
|
|
addUInt(MemLocationDie, 0, dwarf::DW_FORM_udata, FieldOffset >> 3);
|
|
|
|
} else
|
|
// This is not a bitfield.
|
|
addUInt(MemLocationDie, 0, dwarf::DW_FORM_udata, DT.getOffsetInBits() >> 3);
|
|
|
|
if (DT.getTag() == dwarf::DW_TAG_inheritance
|
|
&& DT.isVirtual()) {
|
|
|
|
// For C++, virtual base classes are not at fixed offset. Use following
|
|
// expression to extract appropriate offset from vtable.
|
|
// BaseAddr = ObAddr + *((*ObAddr) - Offset)
|
|
|
|
DIEBlock *VBaseLocationDie = new (DIEValueAllocator) DIEBlock();
|
|
addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_dup);
|
|
addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_deref);
|
|
addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_constu);
|
|
addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_udata, DT.getOffsetInBits());
|
|
addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_minus);
|
|
addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_deref);
|
|
addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_plus);
|
|
|
|
addBlock(MemberDie, dwarf::DW_AT_data_member_location, 0,
|
|
VBaseLocationDie);
|
|
} else
|
|
addBlock(MemberDie, dwarf::DW_AT_data_member_location, 0, MemLocationDie);
|
|
|
|
if (DT.isProtected())
|
|
addUInt(MemberDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_flag,
|
|
dwarf::DW_ACCESS_protected);
|
|
else if (DT.isPrivate())
|
|
addUInt(MemberDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_flag,
|
|
dwarf::DW_ACCESS_private);
|
|
// Otherwise C++ member and base classes are considered public.
|
|
else if (DT.getCompileUnit().getLanguage() == dwarf::DW_LANG_C_plus_plus)
|
|
addUInt(MemberDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_flag,
|
|
dwarf::DW_ACCESS_public);
|
|
if (DT.isVirtual())
|
|
addUInt(MemberDie, dwarf::DW_AT_virtuality, dwarf::DW_FORM_flag,
|
|
dwarf::DW_VIRTUALITY_virtual);
|
|
|
|
// Objective-C properties.
|
|
StringRef PropertyName = DT.getObjCPropertyName();
|
|
if (!PropertyName.empty()) {
|
|
addString(MemberDie, dwarf::DW_AT_APPLE_property_name, dwarf::DW_FORM_string,
|
|
PropertyName);
|
|
StringRef GetterName = DT.getObjCPropertyGetterName();
|
|
if (!GetterName.empty())
|
|
addString(MemberDie, dwarf::DW_AT_APPLE_property_getter,
|
|
dwarf::DW_FORM_string, GetterName);
|
|
StringRef SetterName = DT.getObjCPropertySetterName();
|
|
if (!SetterName.empty())
|
|
addString(MemberDie, dwarf::DW_AT_APPLE_property_setter,
|
|
dwarf::DW_FORM_string, SetterName);
|
|
unsigned PropertyAttributes = 0;
|
|
if (DT.isReadOnlyObjCProperty())
|
|
PropertyAttributes |= dwarf::DW_APPLE_PROPERTY_readonly;
|
|
if (DT.isReadWriteObjCProperty())
|
|
PropertyAttributes |= dwarf::DW_APPLE_PROPERTY_readwrite;
|
|
if (DT.isAssignObjCProperty())
|
|
PropertyAttributes |= dwarf::DW_APPLE_PROPERTY_assign;
|
|
if (DT.isRetainObjCProperty())
|
|
PropertyAttributes |= dwarf::DW_APPLE_PROPERTY_retain;
|
|
if (DT.isCopyObjCProperty())
|
|
PropertyAttributes |= dwarf::DW_APPLE_PROPERTY_copy;
|
|
if (DT.isNonAtomicObjCProperty())
|
|
PropertyAttributes |= dwarf::DW_APPLE_PROPERTY_nonatomic;
|
|
if (PropertyAttributes)
|
|
addUInt(MemberDie, dwarf::DW_AT_APPLE_property_attribute, 0,
|
|
PropertyAttributes);
|
|
}
|
|
return MemberDie;
|
|
}
|