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ffd1746d03
This commit merges the latest LLVM sources from the vendor space. It also updates the build glue to match the new sources. Clang's version number is changed to match LLVM's, which means /usr/include/clang/2.0 has been renamed to /usr/include/clang/2.8. Obtained from: projects/clangbsd
368 lines
11 KiB
C++
368 lines
11 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 "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/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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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(AsmPrinter *AP) 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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AP->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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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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// FIXME: Doing work even in non-asm-verbose runs.
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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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// FIXME: Doing work even in non-asm-verbose runs.
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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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/// addSiblingOffset - Add a sibling offset field to the front of the DIE.
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///
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DIEValue *DIE::addSiblingOffset(BumpPtrAllocator &A) {
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DIEInteger *DI = new (A) 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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return DI;
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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 << "\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 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(AsmPrinter *Asm, unsigned Form) const {
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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: 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: Size = Asm->getTargetData().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, 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(AsmPrinter *AP, 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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case dwarf::DW_FORM_addr: return AP->getTargetData().getPointerSize();
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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(AsmPrinter *AP, unsigned Form) const {
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AP->OutStreamer.EmitBytes(Str, /*addrspace*/0);
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// Emit nul terminator.
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AP->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(AsmPrinter *AP, unsigned Form) const {
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AP->OutStreamer.EmitSymbolValue(Label, SizeOf(AP, Form), 0/*AddrSpace*/);
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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, unsigned Form) const {
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if (Form == dwarf::DW_FORM_data4) return 4;
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return AP->getTargetData().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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// 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, unsigned 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, unsigned Form) const {
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if (Form == dwarf::DW_FORM_data4) return 4;
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return AP->getTargetData().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(AsmPrinter *AP, unsigned Form) const {
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AP->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(AsmPrinter *AP) {
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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(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, unsigned Form) const {
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switch (Form) {
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default: assert(0 && "Improper form for block"); break;
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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 SmallVector<DIEAbbrevData, 8> &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, 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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