forked from OSchip/llvm-project
664 lines
24 KiB
C++
664 lines
24 KiB
C++
//===- lib/MC/MCContext.cpp - Machine Code Context ------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/MC/MCContext.h"
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#include "llvm/ADT/Optional.h"
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#include "llvm/ADT/SmallString.h"
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/ADT/StringMap.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/ADT/Twine.h"
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#include "llvm/BinaryFormat/COFF.h"
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#include "llvm/BinaryFormat/ELF.h"
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#include "llvm/MC/MCAsmInfo.h"
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#include "llvm/MC/MCCodeView.h"
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#include "llvm/MC/MCDwarf.h"
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#include "llvm/MC/MCExpr.h"
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#include "llvm/MC/MCFragment.h"
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#include "llvm/MC/MCLabel.h"
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#include "llvm/MC/MCObjectFileInfo.h"
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#include "llvm/MC/MCSectionCOFF.h"
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#include "llvm/MC/MCSectionELF.h"
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#include "llvm/MC/MCSectionMachO.h"
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#include "llvm/MC/MCSectionWasm.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/MC/MCSymbolCOFF.h"
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#include "llvm/MC/MCSymbolELF.h"
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#include "llvm/MC/MCSymbolMachO.h"
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#include "llvm/MC/MCSymbolWasm.h"
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#include "llvm/MC/SectionKind.h"
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#include "llvm/Support/Casting.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include "llvm/Support/Path.h"
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#include "llvm/Support/Signals.h"
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#include "llvm/Support/SourceMgr.h"
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#include "llvm/Support/raw_ostream.h"
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#include <cassert>
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#include <cstdlib>
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#include <tuple>
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#include <utility>
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using namespace llvm;
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static cl::opt<char*>
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AsSecureLogFileName("as-secure-log-file-name",
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cl::desc("As secure log file name (initialized from "
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"AS_SECURE_LOG_FILE env variable)"),
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cl::init(getenv("AS_SECURE_LOG_FILE")), cl::Hidden);
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MCContext::MCContext(const MCAsmInfo *mai, const MCRegisterInfo *mri,
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const MCObjectFileInfo *mofi, const SourceMgr *mgr,
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bool DoAutoReset)
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: SrcMgr(mgr), InlineSrcMgr(nullptr), MAI(mai), MRI(mri), MOFI(mofi),
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Symbols(Allocator), UsedNames(Allocator),
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CurrentDwarfLoc(0, 0, 0, DWARF2_FLAG_IS_STMT, 0, 0),
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AutoReset(DoAutoReset) {
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SecureLogFile = AsSecureLogFileName;
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if (SrcMgr && SrcMgr->getNumBuffers())
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MainFileName =
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SrcMgr->getMemoryBuffer(SrcMgr->getMainFileID())->getBufferIdentifier();
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}
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MCContext::~MCContext() {
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if (AutoReset)
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reset();
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// NOTE: The symbols are all allocated out of a bump pointer allocator,
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// we don't need to free them here.
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}
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//===----------------------------------------------------------------------===//
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// Module Lifetime Management
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//===----------------------------------------------------------------------===//
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void MCContext::reset() {
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// Call the destructors so the fragments are freed
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COFFAllocator.DestroyAll();
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ELFAllocator.DestroyAll();
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MachOAllocator.DestroyAll();
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MCSubtargetAllocator.DestroyAll();
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UsedNames.clear();
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Symbols.clear();
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Allocator.Reset();
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Instances.clear();
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CompilationDir.clear();
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MainFileName.clear();
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MCDwarfLineTablesCUMap.clear();
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SectionsForRanges.clear();
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MCGenDwarfLabelEntries.clear();
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DwarfDebugFlags = StringRef();
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DwarfCompileUnitID = 0;
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CurrentDwarfLoc = MCDwarfLoc(0, 0, 0, DWARF2_FLAG_IS_STMT, 0, 0);
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CVContext.reset();
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MachOUniquingMap.clear();
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ELFUniquingMap.clear();
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COFFUniquingMap.clear();
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WasmUniquingMap.clear();
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NextID.clear();
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AllowTemporaryLabels = true;
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DwarfLocSeen = false;
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GenDwarfForAssembly = false;
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GenDwarfFileNumber = 0;
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HadError = false;
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}
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//===----------------------------------------------------------------------===//
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// Symbol Manipulation
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//===----------------------------------------------------------------------===//
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MCSymbol *MCContext::getOrCreateSymbol(const Twine &Name) {
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SmallString<128> NameSV;
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StringRef NameRef = Name.toStringRef(NameSV);
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assert(!NameRef.empty() && "Normal symbols cannot be unnamed!");
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MCSymbol *&Sym = Symbols[NameRef];
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if (!Sym)
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Sym = createSymbol(NameRef, false, false);
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return Sym;
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}
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MCSymbol *MCContext::getOrCreateFrameAllocSymbol(StringRef FuncName,
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unsigned Idx) {
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return getOrCreateSymbol(Twine(MAI->getPrivateGlobalPrefix()) + FuncName +
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"$frame_escape_" + Twine(Idx));
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}
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MCSymbol *MCContext::getOrCreateParentFrameOffsetSymbol(StringRef FuncName) {
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return getOrCreateSymbol(Twine(MAI->getPrivateGlobalPrefix()) + FuncName +
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"$parent_frame_offset");
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}
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MCSymbol *MCContext::getOrCreateLSDASymbol(StringRef FuncName) {
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return getOrCreateSymbol(Twine(MAI->getPrivateGlobalPrefix()) + "__ehtable$" +
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FuncName);
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}
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MCSymbol *MCContext::createSymbolImpl(const StringMapEntry<bool> *Name,
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bool IsTemporary) {
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if (MOFI) {
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switch (MOFI->getObjectFileType()) {
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case MCObjectFileInfo::IsCOFF:
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return new (Name, *this) MCSymbolCOFF(Name, IsTemporary);
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case MCObjectFileInfo::IsELF:
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return new (Name, *this) MCSymbolELF(Name, IsTemporary);
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case MCObjectFileInfo::IsMachO:
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return new (Name, *this) MCSymbolMachO(Name, IsTemporary);
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case MCObjectFileInfo::IsWasm:
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return new (Name, *this) MCSymbolWasm(Name, IsTemporary);
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case MCObjectFileInfo::IsXCOFF:
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// TODO: Need to implement class MCSymbolXCOFF.
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break;
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}
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}
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return new (Name, *this) MCSymbol(MCSymbol::SymbolKindUnset, Name,
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IsTemporary);
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}
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MCSymbol *MCContext::createSymbol(StringRef Name, bool AlwaysAddSuffix,
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bool CanBeUnnamed) {
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if (CanBeUnnamed && !UseNamesOnTempLabels)
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return createSymbolImpl(nullptr, true);
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// Determine whether this is a user written assembler temporary or normal
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// label, if used.
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bool IsTemporary = CanBeUnnamed;
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if (AllowTemporaryLabels && !IsTemporary)
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IsTemporary = Name.startswith(MAI->getPrivateGlobalPrefix());
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SmallString<128> NewName = Name;
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bool AddSuffix = AlwaysAddSuffix;
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unsigned &NextUniqueID = NextID[Name];
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while (true) {
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if (AddSuffix) {
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NewName.resize(Name.size());
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raw_svector_ostream(NewName) << NextUniqueID++;
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}
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auto NameEntry = UsedNames.insert(std::make_pair(NewName, true));
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if (NameEntry.second || !NameEntry.first->second) {
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// Ok, we found a name.
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// Mark it as used for a non-section symbol.
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NameEntry.first->second = true;
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// Have the MCSymbol object itself refer to the copy of the string that is
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// embedded in the UsedNames entry.
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return createSymbolImpl(&*NameEntry.first, IsTemporary);
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}
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assert(IsTemporary && "Cannot rename non-temporary symbols");
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AddSuffix = true;
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}
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llvm_unreachable("Infinite loop");
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}
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MCSymbol *MCContext::createTempSymbol(const Twine &Name, bool AlwaysAddSuffix,
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bool CanBeUnnamed) {
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SmallString<128> NameSV;
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raw_svector_ostream(NameSV) << MAI->getPrivateGlobalPrefix() << Name;
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return createSymbol(NameSV, AlwaysAddSuffix, CanBeUnnamed);
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}
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MCSymbol *MCContext::createLinkerPrivateTempSymbol() {
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SmallString<128> NameSV;
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raw_svector_ostream(NameSV) << MAI->getLinkerPrivateGlobalPrefix() << "tmp";
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return createSymbol(NameSV, true, false);
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}
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MCSymbol *MCContext::createTempSymbol(bool CanBeUnnamed) {
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return createTempSymbol("tmp", true, CanBeUnnamed);
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}
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unsigned MCContext::NextInstance(unsigned LocalLabelVal) {
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MCLabel *&Label = Instances[LocalLabelVal];
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if (!Label)
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Label = new (*this) MCLabel(0);
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return Label->incInstance();
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}
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unsigned MCContext::GetInstance(unsigned LocalLabelVal) {
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MCLabel *&Label = Instances[LocalLabelVal];
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if (!Label)
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Label = new (*this) MCLabel(0);
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return Label->getInstance();
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}
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MCSymbol *MCContext::getOrCreateDirectionalLocalSymbol(unsigned LocalLabelVal,
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unsigned Instance) {
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MCSymbol *&Sym = LocalSymbols[std::make_pair(LocalLabelVal, Instance)];
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if (!Sym)
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Sym = createTempSymbol(false);
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return Sym;
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}
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MCSymbol *MCContext::createDirectionalLocalSymbol(unsigned LocalLabelVal) {
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unsigned Instance = NextInstance(LocalLabelVal);
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return getOrCreateDirectionalLocalSymbol(LocalLabelVal, Instance);
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}
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MCSymbol *MCContext::getDirectionalLocalSymbol(unsigned LocalLabelVal,
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bool Before) {
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unsigned Instance = GetInstance(LocalLabelVal);
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if (!Before)
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++Instance;
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return getOrCreateDirectionalLocalSymbol(LocalLabelVal, Instance);
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}
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MCSymbol *MCContext::lookupSymbol(const Twine &Name) const {
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SmallString<128> NameSV;
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StringRef NameRef = Name.toStringRef(NameSV);
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return Symbols.lookup(NameRef);
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}
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void MCContext::setSymbolValue(MCStreamer &Streamer,
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StringRef Sym,
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uint64_t Val) {
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auto Symbol = getOrCreateSymbol(Sym);
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Streamer.EmitAssignment(Symbol, MCConstantExpr::create(Val, *this));
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}
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//===----------------------------------------------------------------------===//
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// Section Management
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//===----------------------------------------------------------------------===//
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MCSectionMachO *MCContext::getMachOSection(StringRef Segment, StringRef Section,
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unsigned TypeAndAttributes,
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unsigned Reserved2, SectionKind Kind,
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const char *BeginSymName) {
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// We unique sections by their segment/section pair. The returned section
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// may not have the same flags as the requested section, if so this should be
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// diagnosed by the client as an error.
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// Form the name to look up.
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SmallString<64> Name;
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Name += Segment;
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Name.push_back(',');
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Name += Section;
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// Do the lookup, if we have a hit, return it.
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MCSectionMachO *&Entry = MachOUniquingMap[Name];
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if (Entry)
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return Entry;
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MCSymbol *Begin = nullptr;
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if (BeginSymName)
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Begin = createTempSymbol(BeginSymName, false);
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// Otherwise, return a new section.
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return Entry = new (MachOAllocator.Allocate()) MCSectionMachO(
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Segment, Section, TypeAndAttributes, Reserved2, Kind, Begin);
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}
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void MCContext::renameELFSection(MCSectionELF *Section, StringRef Name) {
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StringRef GroupName;
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if (const MCSymbol *Group = Section->getGroup())
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GroupName = Group->getName();
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unsigned UniqueID = Section->getUniqueID();
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ELFUniquingMap.erase(
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ELFSectionKey{Section->getSectionName(), GroupName, UniqueID});
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auto I = ELFUniquingMap.insert(std::make_pair(
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ELFSectionKey{Name, GroupName, UniqueID},
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Section))
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.first;
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StringRef CachedName = I->first.SectionName;
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const_cast<MCSectionELF *>(Section)->setSectionName(CachedName);
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}
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MCSectionELF *MCContext::createELFSectionImpl(StringRef Section, unsigned Type,
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unsigned Flags, SectionKind K,
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unsigned EntrySize,
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const MCSymbolELF *Group,
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unsigned UniqueID,
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const MCSymbolELF *Associated) {
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MCSymbolELF *R;
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MCSymbol *&Sym = Symbols[Section];
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// A section symbol can not redefine regular symbols. There may be multiple
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// sections with the same name, in which case the first such section wins.
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if (Sym && Sym->isDefined() &&
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(!Sym->isInSection() || Sym->getSection().getBeginSymbol() != Sym))
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reportError(SMLoc(), "invalid symbol redefinition");
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if (Sym && Sym->isUndefined()) {
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R = cast<MCSymbolELF>(Sym);
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} else {
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auto NameIter = UsedNames.insert(std::make_pair(Section, false)).first;
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R = new (&*NameIter, *this) MCSymbolELF(&*NameIter, /*isTemporary*/ false);
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if (!Sym)
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Sym = R;
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}
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R->setBinding(ELF::STB_LOCAL);
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R->setType(ELF::STT_SECTION);
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auto *Ret = new (ELFAllocator.Allocate()) MCSectionELF(
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Section, Type, Flags, K, EntrySize, Group, UniqueID, R, Associated);
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auto *F = new MCDataFragment();
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Ret->getFragmentList().insert(Ret->begin(), F);
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F->setParent(Ret);
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R->setFragment(F);
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return Ret;
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}
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MCSectionELF *MCContext::createELFRelSection(const Twine &Name, unsigned Type,
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unsigned Flags, unsigned EntrySize,
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const MCSymbolELF *Group,
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const MCSectionELF *RelInfoSection) {
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StringMap<bool>::iterator I;
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bool Inserted;
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std::tie(I, Inserted) =
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RelSecNames.insert(std::make_pair(Name.str(), true));
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return createELFSectionImpl(
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I->getKey(), Type, Flags, SectionKind::getReadOnly(), EntrySize, Group,
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true, cast<MCSymbolELF>(RelInfoSection->getBeginSymbol()));
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}
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MCSectionELF *MCContext::getELFNamedSection(const Twine &Prefix,
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const Twine &Suffix, unsigned Type,
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unsigned Flags,
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unsigned EntrySize) {
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return getELFSection(Prefix + "." + Suffix, Type, Flags, EntrySize, Suffix);
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}
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MCSectionELF *MCContext::getELFSection(const Twine &Section, unsigned Type,
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unsigned Flags, unsigned EntrySize,
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const Twine &Group, unsigned UniqueID,
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const MCSymbolELF *Associated) {
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MCSymbolELF *GroupSym = nullptr;
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if (!Group.isTriviallyEmpty() && !Group.str().empty())
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GroupSym = cast<MCSymbolELF>(getOrCreateSymbol(Group));
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return getELFSection(Section, Type, Flags, EntrySize, GroupSym, UniqueID,
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Associated);
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}
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MCSectionELF *MCContext::getELFSection(const Twine &Section, unsigned Type,
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unsigned Flags, unsigned EntrySize,
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const MCSymbolELF *GroupSym,
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unsigned UniqueID,
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const MCSymbolELF *Associated) {
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StringRef Group = "";
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if (GroupSym)
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Group = GroupSym->getName();
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// Do the lookup, if we have a hit, return it.
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auto IterBool = ELFUniquingMap.insert(
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std::make_pair(ELFSectionKey{Section.str(), Group, UniqueID}, nullptr));
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auto &Entry = *IterBool.first;
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if (!IterBool.second)
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return Entry.second;
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StringRef CachedName = Entry.first.SectionName;
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SectionKind Kind;
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if (Flags & ELF::SHF_ARM_PURECODE)
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Kind = SectionKind::getExecuteOnly();
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else if (Flags & ELF::SHF_EXECINSTR)
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Kind = SectionKind::getText();
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else
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Kind = SectionKind::getReadOnly();
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MCSectionELF *Result = createELFSectionImpl(
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CachedName, Type, Flags, Kind, EntrySize, GroupSym, UniqueID, Associated);
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Entry.second = Result;
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return Result;
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}
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MCSectionELF *MCContext::createELFGroupSection(const MCSymbolELF *Group) {
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return createELFSectionImpl(".group", ELF::SHT_GROUP, 0,
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SectionKind::getReadOnly(), 4, Group, ~0,
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nullptr);
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}
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MCSectionCOFF *MCContext::getCOFFSection(StringRef Section,
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unsigned Characteristics,
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SectionKind Kind,
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StringRef COMDATSymName, int Selection,
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unsigned UniqueID,
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const char *BeginSymName) {
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MCSymbol *COMDATSymbol = nullptr;
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if (!COMDATSymName.empty()) {
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COMDATSymbol = getOrCreateSymbol(COMDATSymName);
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COMDATSymName = COMDATSymbol->getName();
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}
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// Do the lookup, if we have a hit, return it.
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COFFSectionKey T{Section, COMDATSymName, Selection, UniqueID};
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auto IterBool = COFFUniquingMap.insert(std::make_pair(T, nullptr));
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auto Iter = IterBool.first;
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if (!IterBool.second)
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return Iter->second;
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MCSymbol *Begin = nullptr;
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if (BeginSymName)
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Begin = createTempSymbol(BeginSymName, false);
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StringRef CachedName = Iter->first.SectionName;
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MCSectionCOFF *Result = new (COFFAllocator.Allocate()) MCSectionCOFF(
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CachedName, Characteristics, COMDATSymbol, Selection, Kind, Begin);
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Iter->second = Result;
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return Result;
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}
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MCSectionCOFF *MCContext::getCOFFSection(StringRef Section,
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unsigned Characteristics,
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SectionKind Kind,
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const char *BeginSymName) {
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return getCOFFSection(Section, Characteristics, Kind, "", 0, GenericSectionID,
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BeginSymName);
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}
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MCSectionCOFF *MCContext::getCOFFSection(StringRef Section) {
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COFFSectionKey T{Section, "", 0, GenericSectionID};
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auto Iter = COFFUniquingMap.find(T);
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if (Iter == COFFUniquingMap.end())
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return nullptr;
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return Iter->second;
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}
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MCSectionCOFF *MCContext::getAssociativeCOFFSection(MCSectionCOFF *Sec,
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const MCSymbol *KeySym,
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unsigned UniqueID) {
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// Return the normal section if we don't have to be associative or unique.
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if (!KeySym && UniqueID == GenericSectionID)
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return Sec;
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// If we have a key symbol, make an associative section with the same name and
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// kind as the normal section.
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unsigned Characteristics = Sec->getCharacteristics();
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if (KeySym) {
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Characteristics |= COFF::IMAGE_SCN_LNK_COMDAT;
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return getCOFFSection(Sec->getSectionName(), Characteristics,
|
|
Sec->getKind(), KeySym->getName(),
|
|
COFF::IMAGE_COMDAT_SELECT_ASSOCIATIVE, UniqueID);
|
|
}
|
|
|
|
return getCOFFSection(Sec->getSectionName(), Characteristics, Sec->getKind(),
|
|
"", 0, UniqueID);
|
|
}
|
|
|
|
MCSectionWasm *MCContext::getWasmSection(const Twine &Section, SectionKind K,
|
|
const Twine &Group, unsigned UniqueID,
|
|
const char *BeginSymName) {
|
|
MCSymbolWasm *GroupSym = nullptr;
|
|
if (!Group.isTriviallyEmpty() && !Group.str().empty()) {
|
|
GroupSym = cast<MCSymbolWasm>(getOrCreateSymbol(Group));
|
|
GroupSym->setComdat(true);
|
|
}
|
|
|
|
return getWasmSection(Section, K, GroupSym, UniqueID, BeginSymName);
|
|
}
|
|
|
|
MCSectionWasm *MCContext::getWasmSection(const Twine &Section, SectionKind Kind,
|
|
const MCSymbolWasm *GroupSym,
|
|
unsigned UniqueID,
|
|
const char *BeginSymName) {
|
|
StringRef Group = "";
|
|
if (GroupSym)
|
|
Group = GroupSym->getName();
|
|
// Do the lookup, if we have a hit, return it.
|
|
auto IterBool = WasmUniquingMap.insert(
|
|
std::make_pair(WasmSectionKey{Section.str(), Group, UniqueID}, nullptr));
|
|
auto &Entry = *IterBool.first;
|
|
if (!IterBool.second)
|
|
return Entry.second;
|
|
|
|
StringRef CachedName = Entry.first.SectionName;
|
|
|
|
MCSymbol *Begin = createSymbol(CachedName, false, false);
|
|
cast<MCSymbolWasm>(Begin)->setType(wasm::WASM_SYMBOL_TYPE_SECTION);
|
|
|
|
MCSectionWasm *Result = new (WasmAllocator.Allocate())
|
|
MCSectionWasm(CachedName, Kind, GroupSym, UniqueID, Begin);
|
|
Entry.second = Result;
|
|
|
|
auto *F = new MCDataFragment();
|
|
Result->getFragmentList().insert(Result->begin(), F);
|
|
F->setParent(Result);
|
|
Begin->setFragment(F);
|
|
|
|
return Result;
|
|
}
|
|
|
|
MCSubtargetInfo &MCContext::getSubtargetCopy(const MCSubtargetInfo &STI) {
|
|
return *new (MCSubtargetAllocator.Allocate()) MCSubtargetInfo(STI);
|
|
}
|
|
|
|
void MCContext::addDebugPrefixMapEntry(const std::string &From,
|
|
const std::string &To) {
|
|
DebugPrefixMap.insert(std::make_pair(From, To));
|
|
}
|
|
|
|
void MCContext::RemapDebugPaths() {
|
|
const auto &DebugPrefixMap = this->DebugPrefixMap;
|
|
const auto RemapDebugPath = [&DebugPrefixMap](std::string &Path) {
|
|
for (const auto &Entry : DebugPrefixMap)
|
|
if (StringRef(Path).startswith(Entry.first)) {
|
|
std::string RemappedPath =
|
|
(Twine(Entry.second) + Path.substr(Entry.first.size())).str();
|
|
Path.swap(RemappedPath);
|
|
}
|
|
};
|
|
|
|
// Remap compilation directory.
|
|
std::string CompDir = CompilationDir.str();
|
|
RemapDebugPath(CompDir);
|
|
CompilationDir = CompDir;
|
|
|
|
// Remap MCDwarfDirs in all compilation units.
|
|
for (auto &CUIDTablePair : MCDwarfLineTablesCUMap)
|
|
for (auto &Dir : CUIDTablePair.second.getMCDwarfDirs())
|
|
RemapDebugPath(Dir);
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// 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.
|
|
StringRef FileName =
|
|
!getMainFileName().empty() ? StringRef(getMainFileName()) : InputFileName;
|
|
if (FileName.empty() || FileName == "-")
|
|
FileName = "<stdin>";
|
|
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
|
|
/// allocated file number is returned. The file numbers may be in any order.
|
|
Expected<unsigned> MCContext::getDwarfFile(StringRef Directory,
|
|
StringRef FileName,
|
|
unsigned FileNumber,
|
|
Optional<MD5::MD5Result> Checksum,
|
|
Optional<StringRef> Source,
|
|
unsigned CUID) {
|
|
MCDwarfLineTable &Table = MCDwarfLineTablesCUMap[CUID];
|
|
return Table.tryGetFile(Directory, FileName, Checksum, Source, DwarfVersion,
|
|
FileNumber);
|
|
}
|
|
|
|
/// isValidDwarfFileNumber - takes a dwarf file number and returns true if it
|
|
/// currently is assigned and false otherwise.
|
|
bool MCContext::isValidDwarfFileNumber(unsigned FileNumber, unsigned CUID) {
|
|
const MCDwarfLineTable &LineTable = getMCDwarfLineTable(CUID);
|
|
if (FileNumber == 0)
|
|
return getDwarfVersion() >= 5;
|
|
if (FileNumber >= LineTable.getMCDwarfFiles().size())
|
|
return false;
|
|
|
|
return !LineTable.getMCDwarfFiles()[FileNumber].Name.empty();
|
|
}
|
|
|
|
/// Remove empty sections from SectionsForRanges, to avoid generating
|
|
/// useless debug info for them.
|
|
void MCContext::finalizeDwarfSections(MCStreamer &MCOS) {
|
|
SectionsForRanges.remove_if(
|
|
[&](MCSection *Sec) { return !MCOS.mayHaveInstructions(*Sec); });
|
|
}
|
|
|
|
CodeViewContext &MCContext::getCVContext() {
|
|
if (!CVContext.get())
|
|
CVContext.reset(new CodeViewContext);
|
|
return *CVContext.get();
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Error Reporting
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
void MCContext::reportError(SMLoc Loc, const Twine &Msg) {
|
|
HadError = true;
|
|
|
|
// If we have a source manager use it. Otherwise, try using the inline source
|
|
// manager.
|
|
// If that fails, use the generic report_fatal_error().
|
|
if (SrcMgr)
|
|
SrcMgr->PrintMessage(Loc, SourceMgr::DK_Error, Msg);
|
|
else if (InlineSrcMgr)
|
|
InlineSrcMgr->PrintMessage(Loc, SourceMgr::DK_Error, Msg);
|
|
else
|
|
report_fatal_error(Msg, false);
|
|
}
|
|
|
|
void MCContext::reportFatalError(SMLoc Loc, const Twine &Msg) {
|
|
reportError(Loc, Msg);
|
|
|
|
// If we reached here, we are failing ungracefully. Run the interrupt handlers
|
|
// to make sure any special cleanups get done, in particular that we remove
|
|
// files registered with RemoveFileOnSignal.
|
|
sys::RunInterruptHandlers();
|
|
exit(1);
|
|
}
|