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82e7eda150
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@193106 91177308-0d34-0410-b5e6-96231b3b80d8
430 lines
14 KiB
C++
430 lines
14 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 "DwarfDebug.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/IR/DataLayout.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/Support/Allocator.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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#include "llvm/Support/MD5.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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// Explicitly cast to an integer type for which FoldingSetNodeID has
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// overloads. Otherwise MSVC 2010 thinks this call is ambiguous.
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ID.AddInteger(unsigned(Attribute));
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ID.AddInteger(unsigned(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(unsigned(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(AsmPrinter *AP) const {
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// Emit its Dwarf tag type.
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AP->EmitULEB128(Tag, dwarf::TagString(Tag));
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// Emit whether it has children DIEs.
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AP->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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AP->EmitULEB128(AttrData.getAttribute(),
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dwarf::AttributeString(AttrData.getAttribute()));
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// Emit form type.
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AP->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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AP->EmitULEB128(0, "EOM(1)");
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AP->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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DIEValue *DIE::findAttribute(uint16_t Attribute) {
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const SmallVectorImpl<DIEValue *> &Values = getValues();
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const DIEAbbrev &Abbrevs = getAbbrev();
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// Iterate through all the attributes until we find the one we're
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// looking for, if we can't find it return NULL.
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for (size_t i = 0; i < Values.size(); ++i)
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if (Abbrevs.getData()[i].getAttribute() == Attribute)
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return Values[i];
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return NULL;
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}
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#ifndef NDEBUG
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void DIE::print(raw_ostream &O, unsigned IndentCount) const {
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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 << "\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()) << "\n";
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} else {
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O << "Size: " << Size << "\n";
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}
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const SmallVectorImpl<DIEAbbrevData> &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, IndentCount+4);
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}
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if (!isBlock) O << "\n";
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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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void DIEValue::anchor() { }
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#ifndef NDEBUG
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void DIEValue::dump() const {
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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(AsmPrinter *Asm, dwarf::Form Form) const {
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unsigned Size = ~0U;
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switch (Form) {
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case dwarf::DW_FORM_flag_present:
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// Emit something to keep the lines and comments in sync.
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// FIXME: Is there a better way to do this?
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if (Asm->OutStreamer.hasRawTextSupport())
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Asm->OutStreamer.EmitRawText(StringRef(""));
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return;
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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_sec_offset: // Fall thru
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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_GNU_str_index: Asm->EmitULEB128(Integer); return;
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case dwarf::DW_FORM_GNU_addr_index: Asm->EmitULEB128(Integer); return;
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case dwarf::DW_FORM_udata: Asm->EmitULEB128(Integer); return;
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case dwarf::DW_FORM_sdata: Asm->EmitSLEB128(Integer); return;
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case dwarf::DW_FORM_addr:
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Size = Asm->getDataLayout().getPointerSize(); break;
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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);
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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(AsmPrinter *AP, dwarf::Form Form) const {
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switch (Form) {
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case dwarf::DW_FORM_flag_present: return 0;
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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_sec_offset: // Fall thru
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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_GNU_str_index: return MCAsmInfo::getULEB128Size(Integer);
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case dwarf::DW_FORM_GNU_addr_index: return MCAsmInfo::getULEB128Size(Integer);
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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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case dwarf::DW_FORM_addr: return AP->getDataLayout().getPointerSize();
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default: llvm_unreachable("DIE Value form not supported yet");
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}
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}
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#ifndef NDEBUG
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void DIEInteger::print(raw_ostream &O) const {
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O << "Int: " << (int64_t)Integer << " 0x";
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O.write_hex(Integer);
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}
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#endif
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//===----------------------------------------------------------------------===//
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// DIEExpr Implementation
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//===----------------------------------------------------------------------===//
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/// EmitValue - Emit expression value.
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///
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void DIEExpr::EmitValue(AsmPrinter *AP, dwarf::Form Form) const {
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AP->OutStreamer.EmitValue(Expr, SizeOf(AP, Form));
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}
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/// SizeOf - Determine size of expression value in bytes.
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///
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unsigned DIEExpr::SizeOf(AsmPrinter *AP, dwarf::Form Form) const {
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if (Form == dwarf::DW_FORM_data4) return 4;
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if (Form == dwarf::DW_FORM_sec_offset) return 4;
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if (Form == dwarf::DW_FORM_strp) return 4;
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return AP->getDataLayout().getPointerSize();
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}
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#ifndef NDEBUG
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void DIEExpr::print(raw_ostream &O) const {
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O << "Expr: ";
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Expr->print(O);
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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(AsmPrinter *AP, dwarf::Form Form) const {
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AP->EmitLabelReference(Label, SizeOf(AP, Form),
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Form == dwarf::DW_FORM_strp ||
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Form == dwarf::DW_FORM_sec_offset ||
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Form == dwarf::DW_FORM_ref_addr);
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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(AsmPrinter *AP, dwarf::Form Form) const {
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if (Form == dwarf::DW_FORM_data4) return 4;
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if (Form == dwarf::DW_FORM_sec_offset) return 4;
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if (Form == dwarf::DW_FORM_strp) return 4;
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return AP->getDataLayout().getPointerSize();
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}
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#ifndef NDEBUG
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void DIELabel::print(raw_ostream &O) const {
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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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// 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(AsmPrinter *AP, dwarf::Form Form) const {
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AP->EmitLabelDifference(LabelHi, LabelLo, SizeOf(AP, Form));
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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(AsmPrinter *AP, dwarf::Form Form) const {
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if (Form == dwarf::DW_FORM_data4) return 4;
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if (Form == dwarf::DW_FORM_strp) return 4;
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return AP->getDataLayout().getPointerSize();
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}
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#ifndef NDEBUG
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void DIEDelta::print(raw_ostream &O) const {
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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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// 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(AsmPrinter *AP, dwarf::Form Form) const {
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Access->EmitValue(AP, Form);
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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 DIEString::SizeOf(AsmPrinter *AP, dwarf::Form Form) const {
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return Access->SizeOf(AP, Form);
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}
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#ifndef NDEBUG
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void DIEString::print(raw_ostream &O) const {
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O << "String: " << Str << "\tSymbol: ";
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Access->print(O);
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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(AsmPrinter *AP, dwarf::Form Form) const {
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AP->EmitInt32(Entry->getOffset());
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}
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unsigned DIEEntry::getRefAddrSize(AsmPrinter *AP) {
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// DWARF4: References that use the attribute form DW_FORM_ref_addr are
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// specified to be four bytes in the DWARF 32-bit format and eight bytes
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// in the DWARF 64-bit format, while DWARF Version 2 specifies that such
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// references have the same size as an address on the target system.
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if (AP->getDwarfDebug()->getDwarfVersion() == 2)
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return AP->getDataLayout().getPointerSize();
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return sizeof(int32_t);
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}
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#ifndef NDEBUG
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void DIEEntry::print(raw_ostream &O) const {
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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(AsmPrinter *AP) {
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if (!Size) {
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const SmallVectorImpl<DIEAbbrevData> &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(AP, 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(AsmPrinter *Asm, dwarf::Form Form) const {
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switch (Form) {
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default: llvm_unreachable("Improper form for block");
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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: Asm->EmitULEB128(Size); break;
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}
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const SmallVectorImpl<DIEAbbrevData> &AbbrevData = Abbrev.getData();
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for (unsigned i = 0, N = Values.size(); i < N; ++i)
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Values[i]->EmitValue(Asm, AbbrevData[i].getForm());
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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(AsmPrinter *AP, dwarf::Form 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");
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}
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}
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#ifndef NDEBUG
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void DIEBlock::print(raw_ostream &O) const {
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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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