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//===- lib/MC/MCFragment.cpp - Assembler Fragment Implementation ----------===//
//
// 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
//
//===----------------------------------------------------------------------===//
#include "llvm/MC/MCFragment.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/Twine.h"
#include "llvm/Config/llvm-config.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCFixup.h"
#include "llvm/MC/MCSection.h"
#include "llvm/MC/MCSectionMachO.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/Support/Casting.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
#include <cassert>
#include <cstdint>
#include <utility>
using namespace llvm;
MCFragment::MCFragment(FragmentType Kind, bool HasInstructions)
: Kind(Kind), HasInstructions(HasInstructions), LinkerRelaxable(false) {}
void MCFragment::destroy() {
switch (Kind) {
case FT_Align:
cast<MCAlignFragment>(this)->~MCAlignFragment();
return;
case FT_Data:
cast<MCDataFragment>(this)->~MCDataFragment();
return;
case FT_CompactEncodedInst:
cast<MCCompactEncodedInstFragment>(this)->~MCCompactEncodedInstFragment();
return;
case FT_Fill:
cast<MCFillFragment>(this)->~MCFillFragment();
return;
case FT_Nops:
cast<MCNopsFragment>(this)->~MCNopsFragment();
return;
case FT_Relaxable:
cast<MCRelaxableFragment>(this)->~MCRelaxableFragment();
return;
case FT_Org:
cast<MCOrgFragment>(this)->~MCOrgFragment();
return;
case FT_Dwarf:
cast<MCDwarfLineAddrFragment>(this)->~MCDwarfLineAddrFragment();
return;
case FT_DwarfFrame:
cast<MCDwarfCallFrameFragment>(this)->~MCDwarfCallFrameFragment();
return;
case FT_LEB:
cast<MCLEBFragment>(this)->~MCLEBFragment();
return;
case FT_BoundaryAlign:
cast<MCBoundaryAlignFragment>(this)->~MCBoundaryAlignFragment();
return;
case FT_SymbolId:
cast<MCSymbolIdFragment>(this)->~MCSymbolIdFragment();
return;
case FT_CVInlineLines:
cast<MCCVInlineLineTableFragment>(this)->~MCCVInlineLineTableFragment();
return;
case FT_CVDefRange:
cast<MCCVDefRangeFragment>(this)->~MCCVDefRangeFragment();
return;
case FT_PseudoProbe:
cast<MCPseudoProbeAddrFragment>(this)->~MCPseudoProbeAddrFragment();
return;
case FT_Dummy:
cast<MCDummyFragment>(this)->~MCDummyFragment();
return;
}
}
const MCSymbol *MCFragment::getAtom() const {
return cast<MCSectionMachO>(Parent)->getAtom(LayoutOrder);
}
// Debugging methods
namespace llvm {
raw_ostream &operator<<(raw_ostream &OS, const MCFixup &AF) {
OS << "<MCFixup" << " Offset:" << AF.getOffset()
<< " Value:" << *AF.getValue()
<< " Kind:" << AF.getKind() << ">";
return OS;
}
} // end namespace llvm
#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
LLVM_DUMP_METHOD void MCFragment::dump() const {
raw_ostream &OS = errs();
OS << "<";
switch (getKind()) {
case MCFragment::FT_Align: OS << "MCAlignFragment"; break;
case MCFragment::FT_Data: OS << "MCDataFragment"; break;
case MCFragment::FT_CompactEncodedInst:
OS << "MCCompactEncodedInstFragment"; break;
case MCFragment::FT_Fill: OS << "MCFillFragment"; break;
case MCFragment::FT_Nops:
OS << "MCFNopsFragment";
break;
case MCFragment::FT_Relaxable: OS << "MCRelaxableFragment"; break;
case MCFragment::FT_Org: OS << "MCOrgFragment"; break;
case MCFragment::FT_Dwarf: OS << "MCDwarfFragment"; break;
case MCFragment::FT_DwarfFrame: OS << "MCDwarfCallFrameFragment"; break;
case MCFragment::FT_LEB: OS << "MCLEBFragment"; break;
case MCFragment::FT_BoundaryAlign: OS<<"MCBoundaryAlignFragment"; break;
case MCFragment::FT_SymbolId: OS << "MCSymbolIdFragment"; break;
case MCFragment::FT_CVInlineLines: OS << "MCCVInlineLineTableFragment"; break;
case MCFragment::FT_CVDefRange: OS << "MCCVDefRangeTableFragment"; break;
case MCFragment::FT_PseudoProbe:
OS << "MCPseudoProbe";
break;
case MCFragment::FT_Dummy: OS << "MCDummyFragment"; break;
}
OS << "<MCFragment " << (const void *)this << " LayoutOrder:" << LayoutOrder
<< " Offset:" << Offset << " HasInstructions:" << hasInstructions();
if (const auto *EF = dyn_cast<MCEncodedFragment>(this))
OS << " BundlePadding:" << static_cast<unsigned>(EF->getBundlePadding());
OS << ">";
switch (getKind()) {
case MCFragment::FT_Align: {
const auto *AF = cast<MCAlignFragment>(this);
if (AF->hasEmitNops())
OS << " (emit nops)";
OS << "\n ";
OS << " Alignment:" << AF->getAlignment().value()
<< " Value:" << AF->getValue() << " ValueSize:" << AF->getValueSize()
<< " MaxBytesToEmit:" << AF->getMaxBytesToEmit() << ">";
break;
}
case MCFragment::FT_Data: {
const auto *DF = cast<MCDataFragment>(this);
OS << "\n ";
OS << " Contents:[";
const SmallVectorImpl<char> &Contents = DF->getContents();
for (unsigned i = 0, e = Contents.size(); i != e; ++i) {
if (i) OS << ",";
OS << hexdigit((Contents[i] >> 4) & 0xF) << hexdigit(Contents[i] & 0xF);
}
OS << "] (" << Contents.size() << " bytes)";
if (DF->fixup_begin() != DF->fixup_end()) {
OS << ",\n ";
OS << " Fixups:[";
for (MCDataFragment::const_fixup_iterator it = DF->fixup_begin(),
ie = DF->fixup_end(); it != ie; ++it) {
if (it != DF->fixup_begin()) OS << ",\n ";
OS << *it;
}
OS << "]";
}
break;
}
case MCFragment::FT_CompactEncodedInst: {
const auto *CEIF =
cast<MCCompactEncodedInstFragment>(this);
OS << "\n ";
OS << " Contents:[";
const SmallVectorImpl<char> &Contents = CEIF->getContents();
for (unsigned i = 0, e = Contents.size(); i != e; ++i) {
if (i) OS << ",";
OS << hexdigit((Contents[i] >> 4) & 0xF) << hexdigit(Contents[i] & 0xF);
}
OS << "] (" << Contents.size() << " bytes)";
break;
}
case MCFragment::FT_Fill: {
const auto *FF = cast<MCFillFragment>(this);
OS << " Value:" << static_cast<unsigned>(FF->getValue())
<< " ValueSize:" << static_cast<unsigned>(FF->getValueSize())
<< " NumValues:" << FF->getNumValues();
break;
}
case MCFragment::FT_Nops: {
const auto *NF = cast<MCNopsFragment>(this);
OS << " NumBytes:" << NF->getNumBytes()
<< " ControlledNopLength:" << NF->getControlledNopLength();
break;
}
case MCFragment::FT_Relaxable: {
const auto *F = cast<MCRelaxableFragment>(this);
OS << "\n ";
OS << " Inst:";
F->getInst().dump_pretty(OS);
OS << " (" << F->getContents().size() << " bytes)";
break;
}
case MCFragment::FT_Org: {
const auto *OF = cast<MCOrgFragment>(this);
OS << "\n ";
OS << " Offset:" << OF->getOffset()
<< " Value:" << static_cast<unsigned>(OF->getValue());
break;
}
case MCFragment::FT_Dwarf: {
const auto *OF = cast<MCDwarfLineAddrFragment>(this);
OS << "\n ";
OS << " AddrDelta:" << OF->getAddrDelta()
<< " LineDelta:" << OF->getLineDelta();
break;
}
case MCFragment::FT_DwarfFrame: {
const auto *CF = cast<MCDwarfCallFrameFragment>(this);
OS << "\n ";
OS << " AddrDelta:" << CF->getAddrDelta();
break;
}
case MCFragment::FT_LEB: {
const auto *LF = cast<MCLEBFragment>(this);
OS << "\n ";
OS << " Value:" << LF->getValue() << " Signed:" << LF->isSigned();
break;
}
case MCFragment::FT_BoundaryAlign: {
const auto *BF = cast<MCBoundaryAlignFragment>(this);
OS << "\n ";
OS << " BoundarySize:" << BF->getAlignment().value()
<< " LastFragment:" << BF->getLastFragment()
<< " Size:" << BF->getSize();
break;
}
case MCFragment::FT_SymbolId: {
const auto *F = cast<MCSymbolIdFragment>(this);
OS << "\n ";
OS << " Sym:" << F->getSymbol();
break;
}
case MCFragment::FT_CVInlineLines: {
const auto *F = cast<MCCVInlineLineTableFragment>(this);
OS << "\n ";
OS << " Sym:" << *F->getFnStartSym();
break;
}
case MCFragment::FT_CVDefRange: {
const auto *F = cast<MCCVDefRangeFragment>(this);
OS << "\n ";
for (std::pair<const MCSymbol *, const MCSymbol *> RangeStartEnd :
F->getRanges()) {
OS << " RangeStart:" << RangeStartEnd.first;
OS << " RangeEnd:" << RangeStartEnd.second;
}
break;
}
case MCFragment::FT_PseudoProbe: {
const auto *OF = cast<MCPseudoProbeAddrFragment>(this);
OS << "\n ";
OS << " AddrDelta:" << OF->getAddrDelta();
break;
}
case MCFragment::FT_Dummy:
break;
}
OS << ">";
}
#endif
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