1 files changed, 0 insertions, 323 deletions

diff --git a/contrib/llvm/lib/DebugInfo/Symbolize/SymbolizableObjectFile.cpp b/contrib/llvm/lib/DebugInfo/Symbolize/SymbolizableObjectFile.cpp
deleted file mode 100644
index 2765bf44d504..000000000000
--- a/contrib/llvm/lib/DebugInfo/Symbolize/SymbolizableObjectFile.cpp
+++ /dev/null
@@ -1,323 +0,0 @@
-//===- SymbolizableObjectFile.cpp -----------------------------------------===//
-//
-// 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
-//
-//===----------------------------------------------------------------------===//
-//
-// Implementation of SymbolizableObjectFile class.
-//
-//===----------------------------------------------------------------------===//
-
-#include "SymbolizableObjectFile.h"
-#include "llvm/ADT/STLExtras.h"
-#include "llvm/ADT/StringRef.h"
-#include "llvm/ADT/Triple.h"
-#include "llvm/BinaryFormat/COFF.h"
-#include "llvm/DebugInfo/DWARF/DWARFContext.h"
-#include "llvm/DebugInfo/Symbolize/SymbolizableModule.h"
-#include "llvm/Object/COFF.h"
-#include "llvm/Object/ObjectFile.h"
-#include "llvm/Object/SymbolSize.h"
-#include "llvm/Support/Casting.h"
-#include "llvm/Support/DataExtractor.h"
-#include "llvm/Support/Error.h"
-#include <algorithm>
-#include <cstdint>
-#include <memory>
-#include <string>
-#include <system_error>
-#include <utility>
-#include <vector>
-
-using namespace llvm;
-using namespace object;
-using namespace symbolize;
-
-static DILineInfoSpecifier
-getDILineInfoSpecifier(FunctionNameKind FNKind) {
-  return DILineInfoSpecifier(
-      DILineInfoSpecifier::FileLineInfoKind::AbsoluteFilePath, FNKind);
-}
-
-ErrorOr<std::unique_ptr<SymbolizableObjectFile>>
-SymbolizableObjectFile::create(const object::ObjectFile *Obj,
-                               std::unique_ptr<DIContext> DICtx) {
-  assert(DICtx);
-  std::unique_ptr<SymbolizableObjectFile> res(
-      new SymbolizableObjectFile(Obj, std::move(DICtx)));
-  std::unique_ptr<DataExtractor> OpdExtractor;
-  uint64_t OpdAddress = 0;
-  // Find the .opd (function descriptor) section if any, for big-endian
-  // PowerPC64 ELF.
-  if (Obj->getArch() == Triple::ppc64) {
-    for (section_iterator Section : Obj->sections()) {
-      StringRef Name;
-      if (auto EC = Section->getName(Name))
-        return EC;
-      if (Name == ".opd") {
-        Expected<StringRef> E = Section->getContents();
-        if (!E)
-          return errorToErrorCode(E.takeError());
-        OpdExtractor.reset(new DataExtractor(*E, Obj->isLittleEndian(),
-                                             Obj->getBytesInAddress()));
-        OpdAddress = Section->getAddress();
-        break;
-      }
-    }
-  }
-  std::vector<std::pair<SymbolRef, uint64_t>> Symbols =
-      computeSymbolSizes(*Obj);
-  for (auto &P : Symbols)
-    res->addSymbol(P.first, P.second, OpdExtractor.get(), OpdAddress);
-
-  // If this is a COFF object and we didn't find any symbols, try the export
-  // table.
-  if (Symbols.empty()) {
-    if (auto *CoffObj = dyn_cast<COFFObjectFile>(Obj))
-      if (auto EC = res->addCoffExportSymbols(CoffObj))
-        return EC;
-  }
-
-  std::vector<std::pair<SymbolDesc, StringRef>> &Fs = res->Functions,
-                                                &Os = res->Objects;
-  auto Uniquify = [](std::vector<std::pair<SymbolDesc, StringRef>> &S) {
-    // Sort by (Addr,Size,Name). If several SymbolDescs share the same Addr,
-    // pick the one with the largest Size. This helps us avoid symbols with no
-    // size information (Size=0).
-    llvm::sort(S);
-    auto I = S.begin(), E = S.end(), J = S.begin();
-    while (I != E) {
-      auto OI = I;
-      while (++I != E && OI->first.Addr == I->first.Addr) {
-      }
-      *J++ = I[-1];
-    }
-    S.erase(J, S.end());
-  };
-  Uniquify(Fs);
-  Uniquify(Os);
-
-  return std::move(res);
-}
-
-SymbolizableObjectFile::SymbolizableObjectFile(const ObjectFile *Obj,
-                                               std::unique_ptr<DIContext> DICtx)
-    : Module(Obj), DebugInfoContext(std::move(DICtx)) {}
-
-namespace {
-
-struct OffsetNamePair {
-  uint32_t Offset;
-  StringRef Name;
-
-  bool operator<(const OffsetNamePair &R) const {
-    return Offset < R.Offset;
-  }
-};
-
-} // end anonymous namespace
-
-std::error_code SymbolizableObjectFile::addCoffExportSymbols(
-    const COFFObjectFile *CoffObj) {
-  // Get all export names and offsets.
-  std::vector<OffsetNamePair> ExportSyms;
-  for (const ExportDirectoryEntryRef &Ref : CoffObj->export_directories()) {
-    StringRef Name;
-    uint32_t Offset;
-    if (auto EC = Ref.getSymbolName(Name))
-      return EC;
-    if (auto EC = Ref.getExportRVA(Offset))
-      return EC;
-    ExportSyms.push_back(OffsetNamePair{Offset, Name});
-  }
-  if (ExportSyms.empty())
-    return std::error_code();
-
-  // Sort by ascending offset.
-  array_pod_sort(ExportSyms.begin(), ExportSyms.end());
-
-  // Approximate the symbol sizes by assuming they run to the next symbol.
-  // FIXME: This assumes all exports are functions.
-  uint64_t ImageBase = CoffObj->getImageBase();
-  for (auto I = ExportSyms.begin(), E = ExportSyms.end(); I != E; ++I) {
-    OffsetNamePair &Export = *I;
-    // FIXME: The last export has a one byte size now.
-    uint32_t NextOffset = I != E ? I->Offset : Export.Offset + 1;
-    uint64_t SymbolStart = ImageBase + Export.Offset;
-    uint64_t SymbolSize = NextOffset - Export.Offset;
-    SymbolDesc SD = {SymbolStart, SymbolSize};
-    Functions.emplace_back(SD, Export.Name);
-  }
-  return std::error_code();
-}
-
-std::error_code SymbolizableObjectFile::addSymbol(const SymbolRef &Symbol,
-                                                  uint64_t SymbolSize,
-                                                  DataExtractor *OpdExtractor,
-                                                  uint64_t OpdAddress) {
-  // Avoid adding symbols from an unknown/undefined section.
-  const ObjectFile *Obj = Symbol.getObject();
-  Expected<section_iterator> Sec = Symbol.getSection();
-  if (!Sec || (Obj && Obj->section_end() == *Sec))
-    return std::error_code();
-  Expected<SymbolRef::Type> SymbolTypeOrErr = Symbol.getType();
-  if (!SymbolTypeOrErr)
-    return errorToErrorCode(SymbolTypeOrErr.takeError());
-  SymbolRef::Type SymbolType = *SymbolTypeOrErr;
-  if (SymbolType != SymbolRef::ST_Function && SymbolType != SymbolRef::ST_Data)
-    return std::error_code();
-  Expected<uint64_t> SymbolAddressOrErr = Symbol.getAddress();
-  if (!SymbolAddressOrErr)
-    return errorToErrorCode(SymbolAddressOrErr.takeError());
-  uint64_t SymbolAddress = *SymbolAddressOrErr;
-  if (OpdExtractor) {
-    // For big-endian PowerPC64 ELF, symbols in the .opd section refer to
-    // function descriptors. The first word of the descriptor is a pointer to
-    // the function's code.
-    // For the purposes of symbolization, pretend the symbol's address is that
-    // of the function's code, not the descriptor.
-    uint64_t OpdOffset = SymbolAddress - OpdAddress;
-    uint32_t OpdOffset32 = OpdOffset;
-    if (OpdOffset == OpdOffset32 &&
-        OpdExtractor->isValidOffsetForAddress(OpdOffset32))
-      SymbolAddress = OpdExtractor->getAddress(&OpdOffset32);
-  }
-  Expected<StringRef> SymbolNameOrErr = Symbol.getName();
-  if (!SymbolNameOrErr)
-    return errorToErrorCode(SymbolNameOrErr.takeError());
-  StringRef SymbolName = *SymbolNameOrErr;
-  // Mach-O symbol table names have leading underscore, skip it.
-  if (Module->isMachO() && !SymbolName.empty() && SymbolName[0] == '_')
-    SymbolName = SymbolName.drop_front();
-  // FIXME: If a function has alias, there are two entries in symbol table
-  // with same address size. Make sure we choose the correct one.
-  auto &M = SymbolType == SymbolRef::ST_Function ? Functions : Objects;
-  SymbolDesc SD = { SymbolAddress, SymbolSize };
-  M.emplace_back(SD, SymbolName);
-  return std::error_code();
-}
-
-// Return true if this is a 32-bit x86 PE COFF module.
-bool SymbolizableObjectFile::isWin32Module() const {
-  auto *CoffObject = dyn_cast<COFFObjectFile>(Module);
-  return CoffObject && CoffObject->getMachine() == COFF::IMAGE_FILE_MACHINE_I386;
-}
-
-uint64_t SymbolizableObjectFile::getModulePreferredBase() const {
-  if (auto *CoffObject = dyn_cast<COFFObjectFile>(Module))
-    return CoffObject->getImageBase();
-  return 0;
-}
-
-bool SymbolizableObjectFile::getNameFromSymbolTable(SymbolRef::Type Type,
-                                                    uint64_t Address,
-                                                    std::string &Name,
-                                                    uint64_t &Addr,
-                                                    uint64_t &Size) const {
-  const auto &Symbols = Type == SymbolRef::ST_Function ? Functions : Objects;
-  std::pair<SymbolDesc, StringRef> SD{{Address, UINT64_C(-1)}, StringRef()};
-  auto SymbolIterator = llvm::upper_bound(Symbols, SD);
-  if (SymbolIterator == Symbols.begin())
-    return false;
-  --SymbolIterator;
-  if (SymbolIterator->first.Size != 0 &&
-      SymbolIterator->first.Addr + SymbolIterator->first.Size <= Address)
-    return false;
-  Name = SymbolIterator->second.str();
-  Addr = SymbolIterator->first.Addr;
-  Size = SymbolIterator->first.Size;
-  return true;
-}
-
-bool SymbolizableObjectFile::shouldOverrideWithSymbolTable(
-    FunctionNameKind FNKind, bool UseSymbolTable) const {
-  // When DWARF is used with -gline-tables-only / -gmlt, the symbol table gives
-  // better answers for linkage names than the DIContext. Otherwise, we are
-  // probably using PEs and PDBs, and we shouldn't do the override. PE files
-  // generally only contain the names of exported symbols.
-  return FNKind == FunctionNameKind::LinkageName && UseSymbolTable &&
-         isa<DWARFContext>(DebugInfoContext.get());
-}
-
-DILineInfo
-SymbolizableObjectFile::symbolizeCode(object::SectionedAddress ModuleOffset,
-                                      FunctionNameKind FNKind,
-                                      bool UseSymbolTable) const {
-  if (ModuleOffset.SectionIndex == object::SectionedAddress::UndefSection)
-    ModuleOffset.SectionIndex =
-        getModuleSectionIndexForAddress(ModuleOffset.Address);
-  DILineInfo LineInfo = DebugInfoContext->getLineInfoForAddress(
-      ModuleOffset, getDILineInfoSpecifier(FNKind));
-
-  // Override function name from symbol table if necessary.
-  if (shouldOverrideWithSymbolTable(FNKind, UseSymbolTable)) {
-    std::string FunctionName;
-    uint64_t Start, Size;
-    if (getNameFromSymbolTable(SymbolRef::ST_Function, ModuleOffset.Address,
-                               FunctionName, Start, Size)) {
-      LineInfo.FunctionName = FunctionName;
-    }
-  }
-  return LineInfo;
-}
-
-DIInliningInfo SymbolizableObjectFile::symbolizeInlinedCode(
-    object::SectionedAddress ModuleOffset, FunctionNameKind FNKind,
-    bool UseSymbolTable) const {
-  if (ModuleOffset.SectionIndex == object::SectionedAddress::UndefSection)
-    ModuleOffset.SectionIndex =
-        getModuleSectionIndexForAddress(ModuleOffset.Address);
-  DIInliningInfo InlinedContext = DebugInfoContext->getInliningInfoForAddress(
-      ModuleOffset, getDILineInfoSpecifier(FNKind));
-
-  // Make sure there is at least one frame in context.
-  if (InlinedContext.getNumberOfFrames() == 0)
-    InlinedContext.addFrame(DILineInfo());
-
-  // Override the function name in lower frame with name from symbol table.
-  if (shouldOverrideWithSymbolTable(FNKind, UseSymbolTable)) {
-    std::string FunctionName;
-    uint64_t Start, Size;
-    if (getNameFromSymbolTable(SymbolRef::ST_Function, ModuleOffset.Address,
-                               FunctionName, Start, Size)) {
-      InlinedContext.getMutableFrame(InlinedContext.getNumberOfFrames() - 1)
-          ->FunctionName = FunctionName;
-    }
-  }
-
-  return InlinedContext;
-}
-
-DIGlobal SymbolizableObjectFile::symbolizeData(
-    object::SectionedAddress ModuleOffset) const {
-  DIGlobal Res;
-  getNameFromSymbolTable(SymbolRef::ST_Data, ModuleOffset.Address, Res.Name,
-                         Res.Start, Res.Size);
-  return Res;
-}
-
-std::vector<DILocal> SymbolizableObjectFile::symbolizeFrame(
-    object::SectionedAddress ModuleOffset) const {
-  if (ModuleOffset.SectionIndex == object::SectionedAddress::UndefSection)
-    ModuleOffset.SectionIndex =
-        getModuleSectionIndexForAddress(ModuleOffset.Address);
-  return DebugInfoContext->getLocalsForAddress(ModuleOffset);
-}
-
-/// Search for the first occurence of specified Address in ObjectFile.
-uint64_t SymbolizableObjectFile::getModuleSectionIndexForAddress(
-    uint64_t Address) const {
-
-  for (SectionRef Sec : Module->sections()) {
-    if (!Sec.isText() || Sec.isVirtual())
-      continue;
-
-    if (Address >= Sec.getAddress() &&
-        Address < Sec.getAddress() + Sec.getSize())
-      return Sec.getIndex();
-  }
-
-  return object::SectionedAddress::UndefSection;
-}