1 files changed, 195 insertions, 0 deletions
diff --git a/contrib/llvm-project/lldb/source/Plugins/ObjectFile/PDB/ObjectFilePDB.cpp b/contrib/llvm-project/lldb/source/Plugins/ObjectFile/PDB/ObjectFilePDB.cpp
new file mode 100644
index 000000000000..f0832dbf0734
--- /dev/null
+++ b/contrib/llvm-project/lldb/source/Plugins/ObjectFile/PDB/ObjectFilePDB.cpp
@@ -0,0 +1,195 @@
+//===-- ObjectFilePDB.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
+//
+//===----------------------------------------------------------------------===//
+
+#include "ObjectFilePDB.h"
+#include "lldb/Core/Module.h"
+#include "lldb/Core/ModuleSpec.h"
+#include "lldb/Core/PluginManager.h"
+#include "lldb/Core/Section.h"
+#include "lldb/Utility/StreamString.h"
+#include "llvm/BinaryFormat/Magic.h"
+#include "llvm/DebugInfo/PDB/Native/DbiStream.h"
+#include "llvm/DebugInfo/PDB/Native/InfoStream.h"
+#include "llvm/DebugInfo/PDB/Native/NativeSession.h"
+#include "llvm/DebugInfo/PDB/Native/PDBFile.h"
+#include "llvm/DebugInfo/PDB/PDB.h"
+#include "llvm/Support/BinaryByteStream.h"
+
+using namespace lldb;
+using namespace lldb_private;
+using namespace llvm::pdb;
+using namespace llvm::codeview;
+
+LLDB_PLUGIN_DEFINE(ObjectFilePDB)
+
+static UUID GetPDBUUID(InfoStream &IS, DbiStream &DS) {
+  UUID::CvRecordPdb70 debug_info;
+  memcpy(&debug_info.Uuid, IS.getGuid().Guid, sizeof(debug_info.Uuid));
+  debug_info.Age = DS.getAge();
+  return UUID(debug_info);
+}
+
+char ObjectFilePDB::ID;
+
+void ObjectFilePDB::Initialize() {
+  PluginManager::RegisterPlugin(GetPluginNameStatic(),
+                                GetPluginDescriptionStatic(), CreateInstance,
+                                CreateMemoryInstance, GetModuleSpecifications);
+}
+
+void ObjectFilePDB::Terminate() {
+  PluginManager::UnregisterPlugin(CreateInstance);
+}
+
+ArchSpec ObjectFilePDB::GetArchitecture() {
+  auto dbi_stream = m_file_up->getPDBDbiStream();
+  if (!dbi_stream) {
+    llvm::consumeError(dbi_stream.takeError());
+    return ArchSpec();
+  }
+
+  PDB_Machine machine = dbi_stream->getMachineType();
+  switch (machine) {
+  default:
+    break;
+  case PDB_Machine::Amd64:
+  case PDB_Machine::x86:
+  case PDB_Machine::PowerPC:
+  case PDB_Machine::PowerPCFP:
+  case PDB_Machine::Arm:
+  case PDB_Machine::ArmNT:
+  case PDB_Machine::Thumb:
+  case PDB_Machine::Arm64:
+    ArchSpec arch;
+    arch.SetArchitecture(eArchTypeCOFF, static_cast<int>(machine),
+                         LLDB_INVALID_CPUTYPE);
+    return arch;
+  }
+  return ArchSpec();
+}
+
+bool ObjectFilePDB::initPDBFile() {
+  m_file_up = loadPDBFile(m_file.GetPath(), m_allocator);
+  if (!m_file_up)
+    return false;
+  auto info_stream = m_file_up->getPDBInfoStream();
+  if (!info_stream) {
+    llvm::consumeError(info_stream.takeError());
+    return false;
+  }
+  auto dbi_stream = m_file_up->getPDBDbiStream();
+  if (!dbi_stream) {
+    llvm::consumeError(dbi_stream.takeError());
+    return false;
+  }
+  m_uuid = GetPDBUUID(*info_stream, *dbi_stream);
+  return true;
+}
+
+ObjectFile *
+ObjectFilePDB::CreateInstance(const ModuleSP &module_sp, DataBufferSP data_sp,
+                              offset_t data_offset, const FileSpec *file,
+                              offset_t file_offset, offset_t length) {
+  auto objfile_up = std::make_unique<ObjectFilePDB>(
+      module_sp, data_sp, data_offset, file, file_offset, length);
+  if (!objfile_up->initPDBFile())
+    return nullptr;
+  return objfile_up.release();
+}
+
+ObjectFile *ObjectFilePDB::CreateMemoryInstance(const ModuleSP &module_sp,
+                                                WritableDataBufferSP data_sp,
+                                                const ProcessSP &process_sp,
+                                                addr_t header_addr) {
+  return nullptr;
+}
+
+size_t ObjectFilePDB::GetModuleSpecifications(
+    const FileSpec &file, DataBufferSP &data_sp, offset_t data_offset,
+    offset_t file_offset, offset_t length, ModuleSpecList &specs) {
+  const size_t initial_count = specs.GetSize();
+  ModuleSpec module_spec(file);
+  llvm::BumpPtrAllocator allocator;
+  std::unique_ptr<PDBFile> pdb_file = loadPDBFile(file.GetPath(), allocator);
+  if (!pdb_file)
+    return initial_count;
+
+  auto info_stream = pdb_file->getPDBInfoStream();
+  if (!info_stream) {
+    llvm::consumeError(info_stream.takeError());
+    return initial_count;
+  }
+  auto dbi_stream = pdb_file->getPDBDbiStream();
+  if (!dbi_stream) {
+    llvm::consumeError(dbi_stream.takeError());
+    return initial_count;
+  }
+
+  lldb_private::UUID &uuid = module_spec.GetUUID();
+  uuid = GetPDBUUID(*info_stream, *dbi_stream);
+
+  ArchSpec &module_arch = module_spec.GetArchitecture();
+  switch (dbi_stream->getMachineType()) {
+  case PDB_Machine::Amd64:
+    module_arch.SetTriple("x86_64-pc-windows");
+    specs.Append(module_spec);
+    break;
+  case PDB_Machine::x86:
+    module_arch.SetTriple("i386-pc-windows");
+    specs.Append(module_spec);
+    break;
+  case PDB_Machine::ArmNT:
+    module_arch.SetTriple("armv7-pc-windows");
+    specs.Append(module_spec);
+    break;
+  case PDB_Machine::Arm64:
+    module_arch.SetTriple("aarch64-pc-windows");
+    specs.Append(module_spec);
+    break;
+  default:
+    break;
+  }
+
+  return specs.GetSize() - initial_count;
+}
+
+ObjectFilePDB::ObjectFilePDB(const ModuleSP &module_sp, DataBufferSP &data_sp,
+                             offset_t data_offset, const FileSpec *file,
+                             offset_t offset, offset_t length)
+    : ObjectFile(module_sp, file, offset, length, data_sp, data_offset) {}
+
+std::unique_ptr<PDBFile>
+ObjectFilePDB::loadPDBFile(std::string PdbPath,
+                           llvm::BumpPtrAllocator &Allocator) {
+  llvm::file_magic magic;
+  auto ec = llvm::identify_magic(PdbPath, magic);
+  if (ec || magic != llvm::file_magic::pdb)
+    return nullptr;
+  llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> ErrorOrBuffer =
+      llvm::MemoryBuffer::getFile(PdbPath, /*IsText=*/false,
+                                  /*RequiresNullTerminator=*/false);
+  if (!ErrorOrBuffer)
+    return nullptr;
+  std::unique_ptr<llvm::MemoryBuffer> Buffer = std::move(*ErrorOrBuffer);
+
+  llvm::StringRef Path = Buffer->getBufferIdentifier();
+  auto Stream = std::make_unique<llvm::MemoryBufferByteStream>(
+      std::move(Buffer), llvm::endianness::little);
+
+  auto File = std::make_unique<PDBFile>(Path, std::move(Stream), Allocator);
+  if (auto EC = File->parseFileHeaders()) {
+    llvm::consumeError(std::move(EC));
+    return nullptr;
+  }
+  if (auto EC = File->parseStreamData()) {
+    llvm::consumeError(std::move(EC));
+    return nullptr;
+  }
+
+  return File;
+}