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10d571f349
available, the only thing this affects is that we produce .set in one case we didn't before, which shouldn't harm anything. Make EmitSectionOffset call EmitDifference instead of duplicating it. llvm-svn: 98005
400 lines
12 KiB
C++
400 lines
12 KiB
C++
//===--- lib/CodeGen/DIE.cpp - DWARF Info Entries -------------------------===//
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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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// Data structures for DWARF info entries.
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//
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//===----------------------------------------------------------------------===//
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#include "DIE.h"
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#include "DwarfPrinter.h"
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#include "llvm/ADT/Twine.h"
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#include "llvm/CodeGen/AsmPrinter.h"
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#include "llvm/MC/MCAsmInfo.h"
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#include "llvm/MC/MCStreamer.h"
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#include "llvm/MC/MCSymbol.h"
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#include "llvm/Target/TargetData.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/Format.h"
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#include "llvm/Support/FormattedStream.h"
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using namespace llvm;
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//===----------------------------------------------------------------------===//
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// DIEAbbrevData Implementation
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//===----------------------------------------------------------------------===//
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/// Profile - Used to gather unique data for the abbreviation folding set.
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///
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void DIEAbbrevData::Profile(FoldingSetNodeID &ID) const {
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ID.AddInteger(Attribute);
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ID.AddInteger(Form);
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}
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//===----------------------------------------------------------------------===//
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// DIEAbbrev Implementation
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//===----------------------------------------------------------------------===//
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/// Profile - Used to gather unique data for the abbreviation folding set.
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///
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void DIEAbbrev::Profile(FoldingSetNodeID &ID) const {
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ID.AddInteger(Tag);
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ID.AddInteger(ChildrenFlag);
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// For each attribute description.
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for (unsigned i = 0, N = Data.size(); i < N; ++i)
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Data[i].Profile(ID);
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}
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/// Emit - Print the abbreviation using the specified asm printer.
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///
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void DIEAbbrev::Emit(const DwarfPrinter *DP) const {
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// Emit its Dwarf tag type.
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// FIXME: Doing work even in non-asm-verbose runs.
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DP->EmitULEB128(Tag, dwarf::TagString(Tag));
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// Emit whether it has children DIEs.
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// FIXME: Doing work even in non-asm-verbose runs.
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DP->EmitULEB128(ChildrenFlag, dwarf::ChildrenString(ChildrenFlag));
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// For each attribute description.
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for (unsigned i = 0, N = Data.size(); i < N; ++i) {
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const DIEAbbrevData &AttrData = Data[i];
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// Emit attribute type.
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// FIXME: Doing work even in non-asm-verbose runs.
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DP->EmitULEB128(AttrData.getAttribute(),
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dwarf::AttributeString(AttrData.getAttribute()));
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// Emit form type.
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// FIXME: Doing work even in non-asm-verbose runs.
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DP->EmitULEB128(AttrData.getForm(),
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dwarf::FormEncodingString(AttrData.getForm()));
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}
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// Mark end of abbreviation.
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DP->EmitULEB128(0, "EOM(1)");
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DP->EmitULEB128(0, "EOM(2)");
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}
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#ifndef NDEBUG
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void DIEAbbrev::print(raw_ostream &O) {
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O << "Abbreviation @"
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<< format("0x%lx", (long)(intptr_t)this)
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<< " "
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<< dwarf::TagString(Tag)
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<< " "
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<< dwarf::ChildrenString(ChildrenFlag)
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<< '\n';
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for (unsigned i = 0, N = Data.size(); i < N; ++i) {
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O << " "
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<< dwarf::AttributeString(Data[i].getAttribute())
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<< " "
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<< dwarf::FormEncodingString(Data[i].getForm())
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<< '\n';
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}
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}
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void DIEAbbrev::dump() { print(dbgs()); }
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#endif
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//===----------------------------------------------------------------------===//
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// DIE Implementation
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//===----------------------------------------------------------------------===//
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DIE::~DIE() {
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for (unsigned i = 0, N = Children.size(); i < N; ++i)
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delete Children[i];
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}
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/// addSiblingOffset - Add a sibling offset field to the front of the DIE.
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///
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void DIE::addSiblingOffset() {
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DIEInteger *DI = new DIEInteger(0);
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Values.insert(Values.begin(), DI);
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Abbrev.AddFirstAttribute(dwarf::DW_AT_sibling, dwarf::DW_FORM_ref4);
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}
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#ifndef NDEBUG
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void DIE::print(raw_ostream &O, unsigned IncIndent) {
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IndentCount += IncIndent;
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const std::string Indent(IndentCount, ' ');
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bool isBlock = Abbrev.getTag() == 0;
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if (!isBlock) {
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O << Indent
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<< "Die: "
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<< format("0x%lx", (long)(intptr_t)this)
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<< ", Offset: " << Offset
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<< ", Size: " << Size
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<< "\n";
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O << Indent
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<< dwarf::TagString(Abbrev.getTag())
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<< " "
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<< dwarf::ChildrenString(Abbrev.getChildrenFlag());
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} else {
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O << "Size: " << Size;
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}
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O << "\n";
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const SmallVector<DIEAbbrevData, 8> &Data = Abbrev.getData();
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IndentCount += 2;
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for (unsigned i = 0, N = Data.size(); i < N; ++i) {
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O << Indent;
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if (!isBlock)
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O << dwarf::AttributeString(Data[i].getAttribute());
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else
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O << "Blk[" << i << "]";
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O << " "
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<< dwarf::FormEncodingString(Data[i].getForm())
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<< " ";
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Values[i]->print(O);
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O << "\n";
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}
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IndentCount -= 2;
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for (unsigned j = 0, M = Children.size(); j < M; ++j) {
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Children[j]->print(O, 4);
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}
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if (!isBlock) O << "\n";
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IndentCount -= IncIndent;
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}
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void DIE::dump() {
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print(dbgs());
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}
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#endif
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#ifndef NDEBUG
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void DIEValue::dump() {
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print(dbgs());
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}
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#endif
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//===----------------------------------------------------------------------===//
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// DIEInteger Implementation
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//===----------------------------------------------------------------------===//
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/// EmitValue - Emit integer of appropriate size.
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///
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void DIEInteger::EmitValue(DwarfPrinter *D, unsigned Form) const {
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const AsmPrinter *Asm = D->getAsm();
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unsigned Size = ~0U;
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switch (Form) {
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case dwarf::DW_FORM_flag: // Fall thru
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case dwarf::DW_FORM_ref1: // Fall thru
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case dwarf::DW_FORM_data1: Size = 1; break;
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case dwarf::DW_FORM_ref2: // Fall thru
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case dwarf::DW_FORM_data2: Size = 2; break;
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case dwarf::DW_FORM_ref4: // Fall thru
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case dwarf::DW_FORM_data4: Size = 4; break;
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case dwarf::DW_FORM_ref8: // Fall thru
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case dwarf::DW_FORM_data8: Size = 8; break;
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case dwarf::DW_FORM_udata: D->EmitULEB128(Integer); return;
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case dwarf::DW_FORM_sdata: D->EmitSLEB128(Integer, ""); return;
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default: llvm_unreachable("DIE Value form not supported yet");
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}
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Asm->OutStreamer.EmitIntValue(Integer, Size, 0/*addrspace*/);
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}
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/// SizeOf - Determine size of integer value in bytes.
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///
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unsigned DIEInteger::SizeOf(const TargetData *TD, unsigned Form) const {
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switch (Form) {
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case dwarf::DW_FORM_flag: // Fall thru
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case dwarf::DW_FORM_ref1: // Fall thru
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case dwarf::DW_FORM_data1: return sizeof(int8_t);
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case dwarf::DW_FORM_ref2: // Fall thru
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case dwarf::DW_FORM_data2: return sizeof(int16_t);
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case dwarf::DW_FORM_ref4: // Fall thru
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case dwarf::DW_FORM_data4: return sizeof(int32_t);
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case dwarf::DW_FORM_ref8: // Fall thru
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case dwarf::DW_FORM_data8: return sizeof(int64_t);
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case dwarf::DW_FORM_udata: return MCAsmInfo::getULEB128Size(Integer);
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case dwarf::DW_FORM_sdata: return MCAsmInfo::getSLEB128Size(Integer);
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default: llvm_unreachable("DIE Value form not supported yet"); break;
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}
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return 0;
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}
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#ifndef NDEBUG
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void DIEInteger::print(raw_ostream &O) {
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O << "Int: " << (int64_t)Integer
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<< format(" 0x%llx", (unsigned long long)Integer);
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}
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#endif
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//===----------------------------------------------------------------------===//
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// DIEString Implementation
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//===----------------------------------------------------------------------===//
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/// EmitValue - Emit string value.
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///
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void DIEString::EmitValue(DwarfPrinter *D, unsigned Form) const {
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D->getAsm()->OutStreamer.EmitBytes(Str, /*addrspace*/0);
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// Emit nul terminator.
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D->getAsm()->OutStreamer.EmitIntValue(0, 1, /*addrspace*/0);
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}
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#ifndef NDEBUG
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void DIEString::print(raw_ostream &O) {
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O << "Str: \"" << Str << "\"";
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}
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#endif
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//===----------------------------------------------------------------------===//
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// DIELabel Implementation
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//===----------------------------------------------------------------------===//
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/// EmitValue - Emit label value.
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///
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void DIELabel::EmitValue(DwarfPrinter *D, unsigned Form) const {
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bool IsSmall = Form == dwarf::DW_FORM_data4;
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D->EmitReference(Label, false, IsSmall);
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}
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/// SizeOf - Determine size of label value in bytes.
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///
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unsigned DIELabel::SizeOf(const TargetData *TD, unsigned Form) const {
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if (Form == dwarf::DW_FORM_data4) return 4;
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return TD->getPointerSize();
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}
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#ifndef NDEBUG
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void DIELabel::print(raw_ostream &O) {
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O << "Lbl: " << Label->getName();
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}
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#endif
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//===----------------------------------------------------------------------===//
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// DIESectionOffset Implementation
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//===----------------------------------------------------------------------===//
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/// EmitValue - Emit delta value.
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///
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void DIESectionOffset::EmitValue(DwarfPrinter *D, unsigned Form) const {
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bool IsSmall = Form == dwarf::DW_FORM_data4;
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D->EmitSectionOffset(Label, Section, IsSmall, IsEH);
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D->getAsm()->O << '\n'; // FIXME: Necesssary?
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}
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/// SizeOf - Determine size of delta value in bytes.
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///
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unsigned DIESectionOffset::SizeOf(const TargetData *TD, unsigned Form) const {
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if (Form == dwarf::DW_FORM_data4) return 4;
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return TD->getPointerSize();
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}
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#ifndef NDEBUG
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void DIESectionOffset::print(raw_ostream &O) {
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O << "Off: " << Label->getName() << "-" << Section->getName()
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<< "-" << IsEH;
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}
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#endif
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//===----------------------------------------------------------------------===//
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// DIEDelta Implementation
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//===----------------------------------------------------------------------===//
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/// EmitValue - Emit delta value.
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///
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void DIEDelta::EmitValue(DwarfPrinter *D, unsigned Form) const {
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bool IsSmall = Form == dwarf::DW_FORM_data4;
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D->EmitDifference(LabelHi, LabelLo, IsSmall);
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}
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/// SizeOf - Determine size of delta value in bytes.
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///
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unsigned DIEDelta::SizeOf(const TargetData *TD, unsigned Form) const {
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if (Form == dwarf::DW_FORM_data4) return 4;
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return TD->getPointerSize();
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}
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#ifndef NDEBUG
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void DIEDelta::print(raw_ostream &O) {
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O << "Del: " << LabelHi->getName() << "-" << LabelLo->getName();
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}
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#endif
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//===----------------------------------------------------------------------===//
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// DIEEntry Implementation
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//===----------------------------------------------------------------------===//
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/// EmitValue - Emit debug information entry offset.
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///
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void DIEEntry::EmitValue(DwarfPrinter *D, unsigned Form) const {
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D->getAsm()->EmitInt32(Entry->getOffset());
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}
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#ifndef NDEBUG
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void DIEEntry::print(raw_ostream &O) {
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O << format("Die: 0x%lx", (long)(intptr_t)Entry);
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}
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#endif
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//===----------------------------------------------------------------------===//
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// DIEBlock Implementation
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//===----------------------------------------------------------------------===//
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/// ComputeSize - calculate the size of the block.
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///
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unsigned DIEBlock::ComputeSize(const TargetData *TD) {
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if (!Size) {
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const SmallVector<DIEAbbrevData, 8> &AbbrevData = Abbrev.getData();
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for (unsigned i = 0, N = Values.size(); i < N; ++i)
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Size += Values[i]->SizeOf(TD, AbbrevData[i].getForm());
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}
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return Size;
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}
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/// EmitValue - Emit block data.
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///
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void DIEBlock::EmitValue(DwarfPrinter *D, unsigned Form) const {
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const AsmPrinter *Asm = D->getAsm();
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switch (Form) {
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case dwarf::DW_FORM_block1: Asm->EmitInt8(Size); break;
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case dwarf::DW_FORM_block2: Asm->EmitInt16(Size); break;
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case dwarf::DW_FORM_block4: Asm->EmitInt32(Size); break;
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case dwarf::DW_FORM_block: D->EmitULEB128(Size); break;
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default: llvm_unreachable("Improper form for block"); break;
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}
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const SmallVector<DIEAbbrevData, 8> &AbbrevData = Abbrev.getData();
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for (unsigned i = 0, N = Values.size(); i < N; ++i) {
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Asm->O << '\n';
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Values[i]->EmitValue(D, AbbrevData[i].getForm());
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}
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}
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/// SizeOf - Determine size of block data in bytes.
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///
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unsigned DIEBlock::SizeOf(const TargetData *TD, unsigned Form) const {
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switch (Form) {
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case dwarf::DW_FORM_block1: return Size + sizeof(int8_t);
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case dwarf::DW_FORM_block2: return Size + sizeof(int16_t);
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case dwarf::DW_FORM_block4: return Size + sizeof(int32_t);
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case dwarf::DW_FORM_block: return Size + MCAsmInfo::getULEB128Size(Size);
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default: llvm_unreachable("Improper form for block"); break;
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}
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return 0;
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}
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#ifndef NDEBUG
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void DIEBlock::print(raw_ostream &O) {
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O << "Blk: ";
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DIE::print(O, 5);
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}
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#endif
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