diff options
Diffstat (limited to 'contrib/llvm/lib/MC/MCContext.cpp')
| -rw-r--r-- | contrib/llvm/lib/MC/MCContext.cpp | 97 |
1 files changed, 82 insertions, 15 deletions
diff --git a/contrib/llvm/lib/MC/MCContext.cpp b/contrib/llvm/lib/MC/MCContext.cpp index fab517075c5a..0dc2e2d37caf 100644 --- a/contrib/llvm/lib/MC/MCContext.cpp +++ b/contrib/llvm/lib/MC/MCContext.cpp @@ -1,9 +1,8 @@ //===- lib/MC/MCContext.cpp - Machine Code Context ------------------------===// // -// The LLVM Compiler Infrastructure -// -// This file is distributed under the University of Illinois Open Source -// License. See LICENSE.TXT for details. +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception // //===----------------------------------------------------------------------===// @@ -27,17 +26,20 @@ #include "llvm/MC/MCSectionELF.h" #include "llvm/MC/MCSectionMachO.h" #include "llvm/MC/MCSectionWasm.h" +#include "llvm/MC/MCSectionXCOFF.h" #include "llvm/MC/MCStreamer.h" #include "llvm/MC/MCSymbol.h" #include "llvm/MC/MCSymbolCOFF.h" #include "llvm/MC/MCSymbolELF.h" #include "llvm/MC/MCSymbolMachO.h" #include "llvm/MC/MCSymbolWasm.h" +#include "llvm/MC/MCSymbolXCOFF.h" #include "llvm/MC/SectionKind.h" #include "llvm/Support/Casting.h" #include "llvm/Support/CommandLine.h" #include "llvm/Support/ErrorHandling.h" #include "llvm/Support/MemoryBuffer.h" +#include "llvm/Support/Path.h" #include "llvm/Support/Signals.h" #include "llvm/Support/SourceMgr.h" #include "llvm/Support/raw_ostream.h" @@ -85,6 +87,7 @@ void MCContext::reset() { COFFAllocator.DestroyAll(); ELFAllocator.DestroyAll(); MachOAllocator.DestroyAll(); + XCOFFAllocator.DestroyAll(); MCSubtargetAllocator.DestroyAll(); UsedNames.clear(); @@ -106,6 +109,7 @@ void MCContext::reset() { ELFUniquingMap.clear(); COFFUniquingMap.clear(); WasmUniquingMap.clear(); + XCOFFUniquingMap.clear(); NextID.clear(); AllowTemporaryLabels = true; @@ -161,6 +165,8 @@ MCSymbol *MCContext::createSymbolImpl(const StringMapEntry<bool> *Name, return new (Name, *this) MCSymbolMachO(Name, IsTemporary); case MCObjectFileInfo::IsWasm: return new (Name, *this) MCSymbolWasm(Name, IsTemporary); + case MCObjectFileInfo::IsXCOFF: + return new (Name, *this) MCSymbolXCOFF(Name, IsTemporary); } } return new (Name, *this) MCSymbol(MCSymbol::SymbolKindUnset, Name, @@ -459,14 +465,6 @@ MCSectionCOFF *MCContext::getCOFFSection(StringRef Section, BeginSymName); } -MCSectionCOFF *MCContext::getCOFFSection(StringRef Section) { - COFFSectionKey T{Section, "", 0, GenericSectionID}; - auto Iter = COFFUniquingMap.find(T); - if (Iter == COFFUniquingMap.end()) - return nullptr; - return Iter->second; -} - MCSectionCOFF *MCContext::getAssociativeCOFFSection(MCSectionCOFF *Sec, const MCSymbol *KeySym, unsigned UniqueID) { @@ -531,6 +529,38 @@ MCSectionWasm *MCContext::getWasmSection(const Twine &Section, SectionKind Kind, return Result; } +MCSectionXCOFF *MCContext::getXCOFFSection(StringRef Section, + XCOFF::StorageMappingClass SMC, + SectionKind Kind, + const char *BeginSymName) { + // Do the lookup. If we have a hit, return it. + auto IterBool = XCOFFUniquingMap.insert( + std::make_pair(XCOFFSectionKey{Section.str(), SMC}, nullptr)); + auto &Entry = *IterBool.first; + if (!IterBool.second) + return Entry.second; + + // Otherwise, return a new section. + StringRef CachedName = Entry.first.SectionName; + + MCSymbol *Begin = nullptr; + if (BeginSymName) + Begin = createTempSymbol(BeginSymName, false); + + MCSectionXCOFF *Result = new (XCOFFAllocator.Allocate()) + MCSectionXCOFF(CachedName, SMC, Kind, Begin); + Entry.second = Result; + + auto *F = new MCDataFragment(); + Result->getFragmentList().insert(Result->begin(), F); + F->setParent(Result); + + if (Begin) + Begin->setFragment(F); + + return Result; +} + MCSubtargetInfo &MCContext::getSubtargetCopy(const MCSubtargetInfo &STI) { return *new (MCSubtargetAllocator.Allocate()) MCSubtargetInfo(STI); } @@ -566,6 +596,42 @@ void MCContext::RemapDebugPaths() { // Dwarf Management //===----------------------------------------------------------------------===// +void MCContext::setGenDwarfRootFile(StringRef InputFileName, StringRef Buffer) { + // MCDwarf needs the root file as well as the compilation directory. + // If we find a '.file 0' directive that will supersede these values. + Optional<MD5::MD5Result> Cksum; + if (getDwarfVersion() >= 5) { + MD5 Hash; + MD5::MD5Result Sum; + Hash.update(Buffer); + Hash.final(Sum); + Cksum = Sum; + } + // Canonicalize the root filename. It cannot be empty, and should not + // repeat the compilation dir. + // The MCContext ctor initializes MainFileName to the name associated with + // the SrcMgr's main file ID, which might be the same as InputFileName (and + // possibly include directory components). + // Or, MainFileName might have been overridden by a -main-file-name option, + // which is supposed to be just a base filename with no directory component. + // So, if the InputFileName and MainFileName are not equal, assume + // MainFileName is a substitute basename and replace the last component. + SmallString<1024> FileNameBuf = InputFileName; + if (FileNameBuf.empty() || FileNameBuf == "-") + FileNameBuf = "<stdin>"; + if (!getMainFileName().empty() && FileNameBuf != getMainFileName()) { + llvm::sys::path::remove_filename(FileNameBuf); + llvm::sys::path::append(FileNameBuf, getMainFileName()); + } + StringRef FileName = FileNameBuf; + if (FileName.consume_front(getCompilationDir())) + if (llvm::sys::path::is_separator(FileName.front())) + FileName = FileName.drop_front(); + assert(!FileName.empty()); + setMCLineTableRootFile( + /*CUID=*/0, getCompilationDir(), FileName, Cksum, None); +} + /// getDwarfFile - takes a file name and number to place in the dwarf file and /// directory tables. If the file number has already been allocated it is an /// error and zero is returned and the client reports the error, else the @@ -573,11 +639,12 @@ void MCContext::RemapDebugPaths() { Expected<unsigned> MCContext::getDwarfFile(StringRef Directory, StringRef FileName, unsigned FileNumber, - MD5::MD5Result *Checksum, + Optional<MD5::MD5Result> Checksum, Optional<StringRef> Source, unsigned CUID) { MCDwarfLineTable &Table = MCDwarfLineTablesCUMap[CUID]; - return Table.tryGetFile(Directory, FileName, Checksum, Source, FileNumber); + return Table.tryGetFile(Directory, FileName, Checksum, Source, DwarfVersion, + FileNumber); } /// isValidDwarfFileNumber - takes a dwarf file number and returns true if it @@ -585,7 +652,7 @@ Expected<unsigned> MCContext::getDwarfFile(StringRef Directory, bool MCContext::isValidDwarfFileNumber(unsigned FileNumber, unsigned CUID) { const MCDwarfLineTable &LineTable = getMCDwarfLineTable(CUID); if (FileNumber == 0) - return getDwarfVersion() >= 5 && LineTable.hasRootFile(); + return getDwarfVersion() >= 5; if (FileNumber >= LineTable.getMCDwarfFiles().size()) return false; |