1 files changed, 0 insertions, 472 deletions
diff --git a/contrib/llvm-project/llvm/lib/ExecutionEngine/Orc/DebuggerSupportPlugin.cpp b/contrib/llvm-project/llvm/lib/ExecutionEngine/Orc/DebuggerSupportPlugin.cpp
deleted file mode 100644
index 830582bb3649..000000000000
--- a/contrib/llvm-project/llvm/lib/ExecutionEngine/Orc/DebuggerSupportPlugin.cpp
+++ /dev/null
@@ -1,472 +0,0 @@
-//===------- DebuggerSupportPlugin.cpp - Utils for debugger support -------===//
-//
-// 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/ExecutionEngine/Orc/DebuggerSupportPlugin.h"
-
-#include "llvm/ADT/SmallSet.h"
-#include "llvm/ADT/SmallVector.h"
-#include "llvm/ADT/StringSet.h"
-#include "llvm/BinaryFormat/MachO.h"
-
-#define DEBUG_TYPE "orc"
-
-using namespace llvm;
-using namespace llvm::jitlink;
-using namespace llvm::orc;
-
-static const char *SynthDebugSectionName = "__jitlink_synth_debug_object";
-
-namespace {
-
-struct MachO64LE {
-  using UIntPtr = uint64_t;
-
-  using Header = MachO::mach_header_64;
-  using SegmentLC = MachO::segment_command_64;
-  using Section = MachO::section_64;
-  using NList = MachO::nlist_64;
-
-  static constexpr support::endianness Endianness = support::little;
-  static constexpr const uint32_t Magic = MachO::MH_MAGIC_64;
-  static constexpr const uint32_t SegmentCmd = MachO::LC_SEGMENT_64;
-};
-
-class MachODebugObjectSynthesizerBase
-    : public GDBJITDebugInfoRegistrationPlugin::DebugSectionSynthesizer {
-public:
-  static bool isDebugSection(Section &Sec) {
-    return Sec.getName().startswith("__DWARF,");
-  }
-
-  MachODebugObjectSynthesizerBase(LinkGraph &G, ExecutorAddr RegisterActionAddr)
-      : G(G), RegisterActionAddr(RegisterActionAddr) {}
-  virtual ~MachODebugObjectSynthesizerBase() = default;
-
-  Error preserveDebugSections() {
-    if (G.findSectionByName(SynthDebugSectionName)) {
-      LLVM_DEBUG({
-        dbgs() << "MachODebugObjectSynthesizer skipping graph " << G.getName()
-               << " which contains an unexpected existing "
-               << SynthDebugSectionName << " section.\n";
-      });
-      return Error::success();
-    }
-
-    LLVM_DEBUG({
-      dbgs() << "MachODebugObjectSynthesizer visiting graph " << G.getName()
-             << "\n";
-    });
-    for (auto &Sec : G.sections()) {
-      if (!isDebugSection(Sec))
-        continue;
-      // Preserve blocks in this debug section by marking one existing symbol
-      // live for each block, and introducing a new live, anonymous symbol for
-      // each currently unreferenced block.
-      LLVM_DEBUG({
-        dbgs() << "  Preserving debug section " << Sec.getName() << "\n";
-      });
-      SmallSet<Block *, 8> PreservedBlocks;
-      for (auto *Sym : Sec.symbols()) {
-        bool NewPreservedBlock =
-            PreservedBlocks.insert(&Sym->getBlock()).second;
-        if (NewPreservedBlock)
-          Sym->setLive(true);
-      }
-      for (auto *B : Sec.blocks())
-        if (!PreservedBlocks.count(B))
-          G.addAnonymousSymbol(*B, 0, 0, false, true);
-    }
-    return Error::success();
-  }
-
-protected:
-  LinkGraph &G;
-  ExecutorAddr RegisterActionAddr;
-};
-
-template <typename MachOTraits>
-class MachODebugObjectSynthesizer : public MachODebugObjectSynthesizerBase {
-private:
-  class MachOStructWriter {
-  public:
-    MachOStructWriter(MutableArrayRef<char> Buffer) : Buffer(Buffer) {}
-
-    size_t getOffset() const { return Offset; }
-
-    template <typename MachOStruct> void write(MachOStruct S) {
-      assert(Offset + sizeof(S) <= Buffer.size() &&
-             "Container block overflow while constructing debug MachO");
-      if (MachOTraits::Endianness != support::endian::system_endianness())
-        MachO::swapStruct(S);
-      memcpy(Buffer.data() + Offset, &S, sizeof(S));
-      Offset += sizeof(S);
-    }
-
-  private:
-    MutableArrayRef<char> Buffer;
-    size_t Offset = 0;
-  };
-
-public:
-  using MachODebugObjectSynthesizerBase::MachODebugObjectSynthesizerBase;
-
-  Error startSynthesis() override {
-    LLVM_DEBUG({
-      dbgs() << "Creating " << SynthDebugSectionName << " for " << G.getName()
-             << "\n";
-    });
-    auto &SDOSec = G.createSection(SynthDebugSectionName, MemProt::Read);
-
-    struct DebugSectionInfo {
-      Section *Sec = nullptr;
-      StringRef SegName;
-      StringRef SecName;
-      uint64_t Alignment = 0;
-      orc::ExecutorAddr StartAddr;
-      uint64_t Size = 0;
-    };
-
-    SmallVector<DebugSectionInfo, 12> DebugSecInfos;
-    size_t NumSections = 0;
-    for (auto &Sec : G.sections()) {
-      if (Sec.blocks().empty())
-        continue;
-
-      ++NumSections;
-      if (isDebugSection(Sec)) {
-        size_t SepPos = Sec.getName().find(',');
-        if (SepPos > 16 || (Sec.getName().size() - (SepPos + 1) > 16)) {
-          LLVM_DEBUG({
-            dbgs() << "Skipping debug object synthesis for graph "
-                   << G.getName()
-                   << ": encountered non-standard DWARF section name \""
-                   << Sec.getName() << "\"\n";
-          });
-          return Error::success();
-        }
-        DebugSecInfos.push_back({&Sec, Sec.getName().substr(0, SepPos),
-                                 Sec.getName().substr(SepPos + 1), 0,
-                                 orc::ExecutorAddr(), 0});
-      } else {
-        NonDebugSections.push_back(&Sec);
-
-        // If the first block in the section has a non-zero alignment offset
-        // then we need to add a padding block, since the section command in
-        // the header doesn't allow for aligment offsets.
-        SectionRange R(Sec);
-        if (!R.empty()) {
-          auto &FB = *R.getFirstBlock();
-          if (FB.getAlignmentOffset() != 0) {
-            auto Padding = G.allocateBuffer(FB.getAlignmentOffset());
-            memset(Padding.data(), 0, Padding.size());
-            G.createContentBlock(Sec, Padding,
-                                 FB.getAddress() - FB.getAlignmentOffset(),
-                                 FB.getAlignment(), 0);
-          }
-        }
-      }
-    }
-
-    // Create container block.
-    size_t SectionsCmdSize =
-        sizeof(typename MachOTraits::Section) * NumSections;
-    size_t SegmentLCSize =
-        sizeof(typename MachOTraits::SegmentLC) + SectionsCmdSize;
-    size_t ContainerBlockSize =
-        sizeof(typename MachOTraits::Header) + SegmentLCSize;
-    auto ContainerBlockContent = G.allocateBuffer(ContainerBlockSize);
-    MachOContainerBlock = &G.createMutableContentBlock(
-        SDOSec, ContainerBlockContent, orc::ExecutorAddr(), 8, 0);
-
-    // Copy debug section blocks and symbols.
-    orc::ExecutorAddr NextBlockAddr(MachOContainerBlock->getSize());
-    for (auto &SI : DebugSecInfos) {
-      assert(!SI.Sec->blocks().empty() && "Empty debug info section?");
-
-      // Update addresses in debug section.
-      LLVM_DEBUG({
-        dbgs() << "  Appending " << SI.Sec->getName() << " ("
-               << SI.Sec->blocks_size() << " block(s)) at "
-               << formatv("{0:x8}", NextBlockAddr) << "\n";
-      });
-      for (auto *B : SI.Sec->blocks()) {
-        NextBlockAddr = alignToBlock(NextBlockAddr, *B);
-        B->setAddress(NextBlockAddr);
-        NextBlockAddr += B->getSize();
-      }
-
-      auto &FirstBlock = **SI.Sec->blocks().begin();
-      if (FirstBlock.getAlignmentOffset() != 0)
-        return make_error<StringError>(
-            "First block in " + SI.Sec->getName() +
-                " section has non-zero alignment offset",
-            inconvertibleErrorCode());
-      if (FirstBlock.getAlignment() > std::numeric_limits<uint32_t>::max())
-        return make_error<StringError>("First block in " + SI.Sec->getName() +
-                                           " has alignment >4Gb",
-                                       inconvertibleErrorCode());
-
-      SI.Alignment = FirstBlock.getAlignment();
-      SI.StartAddr = FirstBlock.getAddress();
-      SI.Size = NextBlockAddr - SI.StartAddr;
-      G.mergeSections(SDOSec, *SI.Sec);
-      SI.Sec = nullptr;
-    }
-    size_t DebugSectionsSize =
-        NextBlockAddr - orc::ExecutorAddr(MachOContainerBlock->getSize());
-
-    // Write MachO header and debug section load commands.
-    MachOStructWriter Writer(MachOContainerBlock->getAlreadyMutableContent());
-    typename MachOTraits::Header Hdr;
-    memset(&Hdr, 0, sizeof(Hdr));
-    Hdr.magic = MachOTraits::Magic;
-    switch (G.getTargetTriple().getArch()) {
-    case Triple::x86_64:
-      Hdr.cputype = MachO::CPU_TYPE_X86_64;
-      Hdr.cpusubtype = MachO::CPU_SUBTYPE_X86_64_ALL;
-      break;
-    case Triple::aarch64:
-      Hdr.cputype = MachO::CPU_TYPE_ARM64;
-      Hdr.cpusubtype = MachO::CPU_SUBTYPE_ARM64_ALL;
-      break;
-    default:
-      llvm_unreachable("Unsupported architecture");
-    }
-    Hdr.filetype = MachO::MH_OBJECT;
-    Hdr.ncmds = 1;
-    Hdr.sizeofcmds = SegmentLCSize;
-    Hdr.flags = 0;
-    Writer.write(Hdr);
-
-    typename MachOTraits::SegmentLC SegLC;
-    memset(&SegLC, 0, sizeof(SegLC));
-    SegLC.cmd = MachOTraits::SegmentCmd;
-    SegLC.cmdsize = SegmentLCSize;
-    SegLC.vmaddr = ContainerBlockSize;
-    SegLC.vmsize = DebugSectionsSize;
-    SegLC.fileoff = ContainerBlockSize;
-    SegLC.filesize = DebugSectionsSize;
-    SegLC.maxprot =
-        MachO::VM_PROT_READ | MachO::VM_PROT_WRITE | MachO::VM_PROT_EXECUTE;
-    SegLC.initprot =
-        MachO::VM_PROT_READ | MachO::VM_PROT_WRITE | MachO::VM_PROT_EXECUTE;
-    SegLC.nsects = NumSections;
-    SegLC.flags = 0;
-    Writer.write(SegLC);
-
-    StringSet<> ExistingLongNames;
-    for (auto &SI : DebugSecInfos) {
-      typename MachOTraits::Section Sec;
-      memset(&Sec, 0, sizeof(Sec));
-      memcpy(Sec.sectname, SI.SecName.data(), SI.SecName.size());
-      memcpy(Sec.segname, SI.SegName.data(), SI.SegName.size());
-      Sec.addr = SI.StartAddr.getValue();
-      Sec.size = SI.Size;
-      Sec.offset = SI.StartAddr.getValue();
-      Sec.align = SI.Alignment;
-      Sec.reloff = 0;
-      Sec.nreloc = 0;
-      Sec.flags = MachO::S_ATTR_DEBUG;
-      Writer.write(Sec);
-    }
-
-    // Set MachOContainerBlock to indicate success to
-    // completeSynthesisAndRegister.
-    NonDebugSectionsStart = Writer.getOffset();
-    return Error::success();
-  }
-
-  Error completeSynthesisAndRegister() override {
-    if (!MachOContainerBlock) {
-      LLVM_DEBUG({
-        dbgs() << "Not writing MachO debug object header for " << G.getName()
-               << " since createDebugSection failed\n";
-      });
-      return Error::success();
-    }
-
-    LLVM_DEBUG({
-      dbgs() << "Writing MachO debug object header for " << G.getName() << "\n";
-    });
-
-    MachOStructWriter Writer(
-        MachOContainerBlock->getAlreadyMutableContent().drop_front(
-            NonDebugSectionsStart));
-
-    unsigned LongSectionNameIdx = 0;
-    for (auto *Sec : NonDebugSections) {
-      size_t SepPos = Sec->getName().find(',');
-      StringRef SegName, SecName;
-      std::string CustomSecName;
-
-      if ((SepPos == StringRef::npos && Sec->getName().size() <= 16)) {
-        // No embedded segment name, short section name.
-        SegName = "__JITLINK_CUSTOM";
-        SecName = Sec->getName();
-      } else if (SepPos < 16 && (Sec->getName().size() - (SepPos + 1) <= 16)) {
-        // Canonical embedded segment and section name.
-        SegName = Sec->getName().substr(0, SepPos);
-        SecName = Sec->getName().substr(SepPos + 1);
-      } else {
-        // Long section name that needs to be truncated.
-        assert(Sec->getName().size() > 16 &&
-               "Short section name should have been handled above");
-        SegName = "__JITLINK_CUSTOM";
-        auto IdxStr = std::to_string(++LongSectionNameIdx);
-        CustomSecName = Sec->getName().substr(0, 15 - IdxStr.size()).str();
-        CustomSecName += ".";
-        CustomSecName += IdxStr;
-        SecName = StringRef(CustomSecName.data(), 16);
-      }
-
-      SectionRange R(*Sec);
-      if (R.getFirstBlock()->getAlignmentOffset() != 0)
-        return make_error<StringError>(
-            "While building MachO debug object for " + G.getName() +
-                " first block has non-zero alignment offset",
-            inconvertibleErrorCode());
-
-      typename MachOTraits::Section SecCmd;
-      memset(&SecCmd, 0, sizeof(SecCmd));
-      memcpy(SecCmd.sectname, SecName.data(), SecName.size());
-      memcpy(SecCmd.segname, SegName.data(), SegName.size());
-      SecCmd.addr = R.getStart().getValue();
-      SecCmd.size = R.getSize();
-      SecCmd.offset = 0;
-      SecCmd.align = R.getFirstBlock()->getAlignment();
-      SecCmd.reloff = 0;
-      SecCmd.nreloc = 0;
-      SecCmd.flags = 0;
-      Writer.write(SecCmd);
-    }
-
-    static constexpr bool AutoRegisterCode = true;
-    SectionRange R(MachOContainerBlock->getSection());
-    G.allocActions().push_back(
-        {cantFail(shared::WrapperFunctionCall::Create<
-                  shared::SPSArgList<shared::SPSExecutorAddrRange, bool>>(
-             RegisterActionAddr, R.getRange(), AutoRegisterCode)),
-         {}});
-    return Error::success();
-  }
-
-private:
-  Block *MachOContainerBlock = nullptr;
-  SmallVector<Section *, 16> NonDebugSections;
-  size_t NonDebugSectionsStart = 0;
-};
-
-} // end anonymous namespace
-
-namespace llvm {
-namespace orc {
-
-Expected<std::unique_ptr<GDBJITDebugInfoRegistrationPlugin>>
-GDBJITDebugInfoRegistrationPlugin::Create(ExecutionSession &ES,
-                                          JITDylib &ProcessJD,
-                                          const Triple &TT) {
-  auto RegisterActionAddr =
-      TT.isOSBinFormatMachO()
-          ? ES.intern("_llvm_orc_registerJITLoaderGDBAllocAction")
-          : ES.intern("llvm_orc_registerJITLoaderGDBAllocAction");
-
-  if (auto RegisterSym = ES.lookup({&ProcessJD}, RegisterActionAddr))
-    return std::make_unique<GDBJITDebugInfoRegistrationPlugin>(
-        RegisterSym->getAddress());
-  else
-    return RegisterSym.takeError();
-}
-
-Error GDBJITDebugInfoRegistrationPlugin::notifyFailed(
-    MaterializationResponsibility &MR) {
-  return Error::success();
-}
-
-Error GDBJITDebugInfoRegistrationPlugin::notifyRemovingResources(
-    JITDylib &JD, ResourceKey K) {
-  return Error::success();
-}
-
-void GDBJITDebugInfoRegistrationPlugin::notifyTransferringResources(
-    JITDylib &JD, ResourceKey DstKey, ResourceKey SrcKey) {}
-
-void GDBJITDebugInfoRegistrationPlugin::modifyPassConfig(
-    MaterializationResponsibility &MR, LinkGraph &LG,
-    PassConfiguration &PassConfig) {
-
-  if (LG.getTargetTriple().getObjectFormat() == Triple::MachO)
-    modifyPassConfigForMachO(MR, LG, PassConfig);
-  else {
-    LLVM_DEBUG({
-      dbgs() << "GDBJITDebugInfoRegistrationPlugin skipping unspported graph "
-             << LG.getName() << "(triple = " << LG.getTargetTriple().str()
-             << "\n";
-    });
-  }
-}
-
-void GDBJITDebugInfoRegistrationPlugin::modifyPassConfigForMachO(
-    MaterializationResponsibility &MR, jitlink::LinkGraph &LG,
-    jitlink::PassConfiguration &PassConfig) {
-
-  switch (LG.getTargetTriple().getArch()) {
-  case Triple::x86_64:
-  case Triple::aarch64:
-    // Supported, continue.
-    assert(LG.getPointerSize() == 8 && "Graph has incorrect pointer size");
-    assert(LG.getEndianness() == support::little &&
-           "Graph has incorrect endianness");
-    break;
-  default:
-    // Unsupported.
-    LLVM_DEBUG({
-      dbgs() << "GDBJITDebugInfoRegistrationPlugin skipping unsupported "
-             << "MachO graph " << LG.getName()
-             << "(triple = " << LG.getTargetTriple().str()
-             << ", pointer size = " << LG.getPointerSize() << ", endianness = "
-             << (LG.getEndianness() == support::big ? "big" : "little")
-             << ")\n";
-    });
-    return;
-  }
-
-  // Scan for debug sections. If we find one then install passes.
-  bool HasDebugSections = false;
-  for (auto &Sec : LG.sections())
-    if (MachODebugObjectSynthesizerBase::isDebugSection(Sec)) {
-      HasDebugSections = true;
-      break;
-    }
-
-  if (HasDebugSections) {
-    LLVM_DEBUG({
-      dbgs() << "GDBJITDebugInfoRegistrationPlugin: Graph " << LG.getName()
-             << " contains debug info. Installing debugger support passes.\n";
-    });
-
-    auto MDOS = std::make_shared<MachODebugObjectSynthesizer<MachO64LE>>(
-        LG, RegisterActionAddr);
-    PassConfig.PrePrunePasses.push_back(
-        [=](LinkGraph &G) { return MDOS->preserveDebugSections(); });
-    PassConfig.PostPrunePasses.push_back(
-        [=](LinkGraph &G) { return MDOS->startSynthesis(); });
-    PassConfig.PreFixupPasses.push_back(
-        [=](LinkGraph &G) { return MDOS->completeSynthesisAndRegister(); });
-  } else {
-    LLVM_DEBUG({
-      dbgs() << "GDBJITDebugInfoRegistrationPlugin: Graph " << LG.getName()
-             << " contains no debug info. Skipping.\n";
-    });
-  }
-}
-
-} // namespace orc
-} // namespace llvm