PluginManager.cpp

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//===-- PluginManager.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 "lldb/Core/PluginManager.h"
 
#include "lldb/Core/Debugger.h"
#include "lldb/Host/FileSystem.h"
#include "lldb/Host/HostInfo.h"
#include "lldb/Interpreter/OptionValueProperties.h"
#include "lldb/Target/Process.h"
#include "lldb/Utility/ConstString.h"
#include "lldb/Utility/FileSpec.h"
#include "lldb/Utility/Status.h"
#include "lldb/Utility/StringList.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Support/DynamicLibrary.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/raw_ostream.h"
#include <cassert>
#include <map>
#include <memory>
#include <mutex>
#include <string>
#include <utility>
#include <vector>
#if defined(_WIN32)
#include "lldb/Host/windows/PosixApi.h"
#endif
 
using namespace lldb;
using namespace lldb_private;
 
typedef bool (*PluginInitCallback)();
typedef void (*PluginTermCallback)();
 
struct PluginInfo {
  PluginInfo() = default;
 
  llvm::sys::DynamicLibrary library;
  PluginInitCallback plugin_init_callback = nullptr;
  PluginTermCallback plugin_term_callback = nullptr;
};
 
typedef std::map<FileSpec, PluginInfo> PluginTerminateMap;
 
static std::recursive_mutex &GetPluginMapMutex() {
  static std::recursive_mutex g_plugin_map_mutex;
  return g_plugin_map_mutex;
}
 
static PluginTerminateMap &GetPluginMap() {
  static PluginTerminateMap g_plugin_map;
  return g_plugin_map;
}
 
static bool PluginIsLoaded(const FileSpec &plugin_file_spec) {
  std::lock_guard<std::recursive_mutex> guard(GetPluginMapMutex());
  PluginTerminateMap &plugin_map = GetPluginMap();
  return plugin_map.find(plugin_file_spec) != plugin_map.end();
}
 
static void SetPluginInfo(const FileSpec &plugin_file_spec,
                          const PluginInfo &plugin_info) {
  std::lock_guard<std::recursive_mutex> guard(GetPluginMapMutex());
  PluginTerminateMap &plugin_map = GetPluginMap();
  assert(plugin_map.find(plugin_file_spec) == plugin_map.end());
  plugin_map[plugin_file_spec] = plugin_info;
}
 
template <typename FPtrTy> static FPtrTy CastToFPtr(void *VPtr) {
  return reinterpret_cast<FPtrTy>(VPtr);
}
 
static FileSystem::EnumerateDirectoryResult
LoadPluginCallback(void *baton, llvm::sys::fs::file_type ft,
                   llvm::StringRef path) {
  Status error;
 
  namespace fs = llvm::sys::fs;
  // If we have a regular file, a symbolic link or unknown file type, try and
  // process the file. We must handle unknown as sometimes the directory
  // enumeration might be enumerating a file system that doesn't have correct
  // file type information.
  if (ft == fs::file_type::regular_file || ft == fs::file_type::symlink_file ||
      ft == fs::file_type::type_unknown) {
    FileSpec plugin_file_spec(path);
    FileSystem::Instance().Resolve(plugin_file_spec);
 
    if (PluginIsLoaded(plugin_file_spec))
      return FileSystem::eEnumerateDirectoryResultNext;
    else {
      PluginInfo plugin_info;
 
      std::string pluginLoadError;
      plugin_info.library = llvm::sys::DynamicLibrary::getPermanentLibrary(
          plugin_file_spec.GetPath().c_str(), &pluginLoadError);
      if (plugin_info.library.isValid()) {
        bool success = false;
        plugin_info.plugin_init_callback = CastToFPtr<PluginInitCallback>(
            plugin_info.library.getAddressOfSymbol("LLDBPluginInitialize"));
        if (plugin_info.plugin_init_callback) {
          // Call the plug-in "bool LLDBPluginInitialize(void)" function
          success = plugin_info.plugin_init_callback();
        }
 
        if (success) {
          // It is ok for the "LLDBPluginTerminate" symbol to be nullptr
          plugin_info.plugin_term_callback = CastToFPtr<PluginTermCallback>(
              plugin_info.library.getAddressOfSymbol("LLDBPluginTerminate"));
        } else {
          // The initialize function returned FALSE which means the plug-in
          // might not be compatible, or might be too new or too old, or might
          // not want to run on this machine.  Set it to a default-constructed
          // instance to invalidate it.
          plugin_info = PluginInfo();
        }
 
        // Regardless of success or failure, cache the plug-in load in our
        // plug-in info so we don't try to load it again and again.
        SetPluginInfo(plugin_file_spec, plugin_info);
 
        return FileSystem::eEnumerateDirectoryResultNext;
      }
    }
  }
 
  if (ft == fs::file_type::directory_file ||
      ft == fs::file_type::symlink_file || ft == fs::file_type::type_unknown) {
    // Try and recurse into anything that a directory or symbolic link. We must
    // also do this for unknown as sometimes the directory enumeration might be
    // enumerating a file system that doesn't have correct file type
    // information.
    return FileSystem::eEnumerateDirectoryResultEnter;
  }
 
  return FileSystem::eEnumerateDirectoryResultNext;
}
 
void PluginManager::Initialize() {
  const bool find_directories = true;
  const bool find_files = true;
  const bool find_other = true;
  char dir_path[PATH_MAX];
  if (FileSpec dir_spec = HostInfo::GetSystemPluginDir()) {
    if (FileSystem::Instance().Exists(dir_spec) &&
        dir_spec.GetPath(dir_path, sizeof(dir_path))) {
      FileSystem::Instance().EnumerateDirectory(dir_path, find_directories,
                                                find_files, find_other,
                                                LoadPluginCallback, nullptr);
    }
  }
 
  if (FileSpec dir_spec = HostInfo::GetUserPluginDir()) {
    if (FileSystem::Instance().Exists(dir_spec) &&
        dir_spec.GetPath(dir_path, sizeof(dir_path))) {
      FileSystem::Instance().EnumerateDirectory(dir_path, find_directories,
                                                find_files, find_other,
                                                LoadPluginCallback, nullptr);
    }
  }
}
 
void PluginManager::Terminate() {
  std::lock_guard<std::recursive_mutex> guard(GetPluginMapMutex());
  PluginTerminateMap &plugin_map = GetPluginMap();
 
  PluginTerminateMap::const_iterator pos, end = plugin_map.end();
  for (pos = plugin_map.begin(); pos != end; ++pos) {
    // Call the plug-in "void LLDBPluginTerminate (void)" function if there is
    // one (if the symbol was not nullptr).
    if (pos->second.library.isValid()) {
      if (pos->second.plugin_term_callback)
        pos->second.plugin_term_callback();
    }
  }
  plugin_map.clear();
}
 
template <typename Callback> struct PluginInstance {
  typedef Callback CallbackType;
 
  PluginInstance() = default;
  PluginInstance(ConstString name, std::string description,
                 Callback create_callback = nullptr,
                 DebuggerInitializeCallback debugger_init_callback = nullptr)
      : name(name), description(std::move(description)),
        create_callback(create_callback),
        debugger_init_callback(debugger_init_callback) {}
 
  ConstString name;
  std::string description;
  Callback create_callback;
  DebuggerInitializeCallback debugger_init_callback;
};
 
template <typename Instance> class PluginInstances {
public:
  template <typename... Args>
  bool RegisterPlugin(ConstString name, const char *description,
                      typename Instance::CallbackType callback,
                      Args &&... args) {
    if (!callback)
      return false;
    assert((bool)name);
    Instance instance =
        Instance(name, description, callback, std::forward<Args>(args)...);
    m_instances.push_back(instance);
    return false;
  }
 
  bool UnregisterPlugin(typename Instance::CallbackType callback) {
    if (!callback)
      return false;
    auto pos = m_instances.begin();
    auto end = m_instances.end();
    for (; pos != end; ++pos) {
      if (pos->create_callback == callback) {
        m_instances.erase(pos);
        return true;
      }
    }
    return false;
  }
 
  typename Instance::CallbackType GetCallbackAtIndex(uint32_t idx) {
    if (Instance *instance = GetInstanceAtIndex(idx))
      return instance->create_callback;
    return nullptr;
  }
 
  const char *GetDescriptionAtIndex(uint32_t idx) {
    if (Instance *instance = GetInstanceAtIndex(idx))
      return instance->description.c_str();
    return nullptr;
  }
 
  const char *GetNameAtIndex(uint32_t idx) {
    if (Instance *instance = GetInstanceAtIndex(idx))
      return instance->name.GetCString();
    return nullptr;
  }
 
  typename Instance::CallbackType GetCallbackForName(ConstString name) {
    if (!name)
      return nullptr;
    for (auto &instance : m_instances) {
      if (name == instance.name)
        return instance.create_callback;
    }
    return nullptr;
  }
 
  void PerformDebuggerCallback(Debugger &debugger) {
    for (auto &instance : m_instances) {
      if (instance.debugger_init_callback)
        instance.debugger_init_callback(debugger);
    }
  }
 
  const std::vector<Instance> &GetInstances() const { return m_instances; }
  std::vector<Instance> &GetInstances() { return m_instances; }
 
  Instance *GetInstanceAtIndex(uint32_t idx) {
    if (idx < m_instances.size())
      return &m_instances[idx];
    return nullptr;
  }
 
private:
  std::vector<Instance> m_instances;
};
 
#pragma mark ABI
 
typedef PluginInstance<ABICreateInstance> ABIInstance;
typedef PluginInstances<ABIInstance> ABIInstances;
 
static ABIInstances &GetABIInstances() {
  static ABIInstances g_instances;
  return g_instances;
}
 
bool PluginManager::RegisterPlugin(ConstString name, const char *description,
                                   ABICreateInstance create_callback) {
  return GetABIInstances().RegisterPlugin(name, description, create_callback);
}
 
bool PluginManager::UnregisterPlugin(ABICreateInstance create_callback) {
  return GetABIInstances().UnregisterPlugin(create_callback);
}
 
ABICreateInstance PluginManager::GetABICreateCallbackAtIndex(uint32_t idx) {
  return GetABIInstances().GetCallbackAtIndex(idx);
}
 
#pragma mark Architecture
 
typedef PluginInstance<ArchitectureCreateInstance> ArchitectureInstance;
typedef std::vector<ArchitectureInstance> ArchitectureInstances;
 
static ArchitectureInstances &GetArchitectureInstances() {
  static ArchitectureInstances g_instances;
  return g_instances;
}
 
void PluginManager::RegisterPlugin(ConstString name,
                                   llvm::StringRef description,
                                   ArchitectureCreateInstance create_callback) {
  GetArchitectureInstances().push_back(
      {name, std::string(description), create_callback});
}
 
void PluginManager::UnregisterPlugin(
    ArchitectureCreateInstance create_callback) {
  auto &instances = GetArchitectureInstances();
 
  for (auto pos = instances.begin(), end = instances.end(); pos != end; ++pos) {
    if (pos->create_callback == create_callback) {
      instances.erase(pos);
      return;
    }
  }
  llvm_unreachable("Plugin not found");
}
 
std::unique_ptr<Architecture>
PluginManager::CreateArchitectureInstance(const ArchSpec &arch) {
  for (const auto &instances : GetArchitectureInstances()) {
    if (auto plugin_up = instances.create_callback(arch))
      return plugin_up;
  }
  return nullptr;
}
 
#pragma mark Disassembler
 
typedef PluginInstance<DisassemblerCreateInstance> DisassemblerInstance;
typedef PluginInstances<DisassemblerInstance> DisassemblerInstances;
 
static DisassemblerInstances &GetDisassemblerInstances() {
  static DisassemblerInstances g_instances;
  return g_instances;
}
 
bool PluginManager::RegisterPlugin(ConstString name, const char *description,
                                   DisassemblerCreateInstance create_callback) {
  return GetDisassemblerInstances().RegisterPlugin(name, description,
                                                   create_callback);
}
 
bool PluginManager::UnregisterPlugin(
    DisassemblerCreateInstance create_callback) {
  return GetDisassemblerInstances().UnregisterPlugin(create_callback);
}
 
DisassemblerCreateInstance
PluginManager::GetDisassemblerCreateCallbackAtIndex(uint32_t idx) {
  return GetDisassemblerInstances().GetCallbackAtIndex(idx);
}
 
DisassemblerCreateInstance
PluginManager::GetDisassemblerCreateCallbackForPluginName(ConstString name) {
  return GetDisassemblerInstances().GetCallbackForName(name);
}
 
#pragma mark DynamicLoader
 
typedef PluginInstance<DynamicLoaderCreateInstance> DynamicLoaderInstance;
typedef PluginInstances<DynamicLoaderInstance> DynamicLoaderInstances;
 
static DynamicLoaderInstances &GetDynamicLoaderInstances() {
  static DynamicLoaderInstances g_instances;
  return g_instances;
}
 
bool PluginManager::RegisterPlugin(
    ConstString name, const char *description,
    DynamicLoaderCreateInstance create_callback,
    DebuggerInitializeCallback debugger_init_callback) {
  return GetDynamicLoaderInstances().RegisterPlugin(
      name, description, create_callback, debugger_init_callback);
}
 
bool PluginManager::UnregisterPlugin(
    DynamicLoaderCreateInstance create_callback) {
  return GetDynamicLoaderInstances().UnregisterPlugin(create_callback);
}
 
DynamicLoaderCreateInstance
PluginManager::GetDynamicLoaderCreateCallbackAtIndex(uint32_t idx) {
  return GetDynamicLoaderInstances().GetCallbackAtIndex(idx);
}
 
DynamicLoaderCreateInstance
PluginManager::GetDynamicLoaderCreateCallbackForPluginName(ConstString name) {
  return GetDynamicLoaderInstances().GetCallbackForName(name);
}
 
#pragma mark JITLoader
 
typedef PluginInstance<JITLoaderCreateInstance> JITLoaderInstance;
typedef PluginInstances<JITLoaderInstance> JITLoaderInstances;
 
static JITLoaderInstances &GetJITLoaderInstances() {
  static JITLoaderInstances g_instances;
  return g_instances;
}
 
bool PluginManager::RegisterPlugin(
    ConstString name, const char *description,
    JITLoaderCreateInstance create_callback,
    DebuggerInitializeCallback debugger_init_callback) {
  return GetJITLoaderInstances().RegisterPlugin(
      name, description, create_callback, debugger_init_callback);
}
 
bool PluginManager::UnregisterPlugin(JITLoaderCreateInstance create_callback) {
  return GetJITLoaderInstances().UnregisterPlugin(create_callback);
}
 
JITLoaderCreateInstance
PluginManager::GetJITLoaderCreateCallbackAtIndex(uint32_t idx) {
  return GetJITLoaderInstances().GetCallbackAtIndex(idx);
}
 
#pragma mark EmulateInstruction
 
typedef PluginInstance<EmulateInstructionCreateInstance>
    EmulateInstructionInstance;
typedef PluginInstances<EmulateInstructionInstance> EmulateInstructionInstances;
 
static EmulateInstructionInstances &GetEmulateInstructionInstances() {
  static EmulateInstructionInstances g_instances;
  return g_instances;
}
 
bool PluginManager::RegisterPlugin(
    ConstString name, const char *description,
    EmulateInstructionCreateInstance create_callback) {
  return GetEmulateInstructionInstances().RegisterPlugin(name, description,
                                                         create_callback);
}
 
bool PluginManager::UnregisterPlugin(
    EmulateInstructionCreateInstance create_callback) {
  return GetEmulateInstructionInstances().UnregisterPlugin(create_callback);
}
 
EmulateInstructionCreateInstance
PluginManager::GetEmulateInstructionCreateCallbackAtIndex(uint32_t idx) {
  return GetEmulateInstructionInstances().GetCallbackAtIndex(idx);
}
 
EmulateInstructionCreateInstance
PluginManager::GetEmulateInstructionCreateCallbackForPluginName(
    ConstString name) {
  return GetEmulateInstructionInstances().GetCallbackForName(name);
}
 
#pragma mark OperatingSystem
 
typedef PluginInstance<OperatingSystemCreateInstance> OperatingSystemInstance;
typedef PluginInstances<OperatingSystemInstance> OperatingSystemInstances;
 
static OperatingSystemInstances &GetOperatingSystemInstances() {
  static OperatingSystemInstances g_instances;
  return g_instances;
}
 
bool PluginManager::RegisterPlugin(
    ConstString name, const char *description,
    OperatingSystemCreateInstance create_callback,
    DebuggerInitializeCallback debugger_init_callback) {
  return GetOperatingSystemInstances().RegisterPlugin(
      name, description, create_callback, debugger_init_callback);
}
 
bool PluginManager::UnregisterPlugin(
    OperatingSystemCreateInstance create_callback) {
  return GetOperatingSystemInstances().UnregisterPlugin(create_callback);
}
 
OperatingSystemCreateInstance
PluginManager::GetOperatingSystemCreateCallbackAtIndex(uint32_t idx) {
  return GetOperatingSystemInstances().GetCallbackAtIndex(idx);
}
 
OperatingSystemCreateInstance
PluginManager::GetOperatingSystemCreateCallbackForPluginName(ConstString name) {
  return GetOperatingSystemInstances().GetCallbackForName(name);
}
 
#pragma mark Language
 
typedef PluginInstance<LanguageCreateInstance> LanguageInstance;
typedef PluginInstances<LanguageInstance> LanguageInstances;
 
static LanguageInstances &GetLanguageInstances() {
  static LanguageInstances g_instances;
  return g_instances;
}
 
bool PluginManager::RegisterPlugin(ConstString name, const char *description,
                                   LanguageCreateInstance create_callback) {
  return GetLanguageInstances().RegisterPlugin(name, description,
                                               create_callback);
}
 
bool PluginManager::UnregisterPlugin(LanguageCreateInstance create_callback) {
  return GetLanguageInstances().UnregisterPlugin(create_callback);
}
 
LanguageCreateInstance
PluginManager::GetLanguageCreateCallbackAtIndex(uint32_t idx) {
  return GetLanguageInstances().GetCallbackAtIndex(idx);
}
 
#pragma mark LanguageRuntime
 
struct LanguageRuntimeInstance
    : public PluginInstance<LanguageRuntimeCreateInstance> {
  LanguageRuntimeInstance(
      ConstString name, std::string description, CallbackType create_callback,
      DebuggerInitializeCallback debugger_init_callback,
      LanguageRuntimeGetCommandObject command_callback,
      LanguageRuntimeGetExceptionPrecondition precondition_callback)
      : PluginInstance<LanguageRuntimeCreateInstance>(
            name, std::move(description), create_callback,
            debugger_init_callback),
        command_callback(command_callback),
        precondition_callback(precondition_callback) {}
 
  LanguageRuntimeGetCommandObject command_callback;
  LanguageRuntimeGetExceptionPrecondition precondition_callback;
};
 
typedef PluginInstances<LanguageRuntimeInstance> LanguageRuntimeInstances;
 
static LanguageRuntimeInstances &GetLanguageRuntimeInstances() {
  static LanguageRuntimeInstances g_instances;
  return g_instances;
}
 
bool PluginManager::RegisterPlugin(
    ConstString name, const char *description,
    LanguageRuntimeCreateInstance create_callback,
    LanguageRuntimeGetCommandObject command_callback,
    LanguageRuntimeGetExceptionPrecondition precondition_callback) {
  return GetLanguageRuntimeInstances().RegisterPlugin(
      name, description, create_callback, nullptr, command_callback,
      precondition_callback);
}
 
bool PluginManager::UnregisterPlugin(
    LanguageRuntimeCreateInstance create_callback) {
  return GetLanguageRuntimeInstances().UnregisterPlugin(create_callback);
}
 
LanguageRuntimeCreateInstance
PluginManager::GetLanguageRuntimeCreateCallbackAtIndex(uint32_t idx) {
  return GetLanguageRuntimeInstances().GetCallbackAtIndex(idx);
}
 
LanguageRuntimeGetCommandObject
PluginManager::GetLanguageRuntimeGetCommandObjectAtIndex(uint32_t idx) {
  const auto &instances = GetLanguageRuntimeInstances().GetInstances();
  if (idx < instances.size())
    return instances[idx].command_callback;
  return nullptr;
}
 
LanguageRuntimeGetExceptionPrecondition
PluginManager::GetLanguageRuntimeGetExceptionPreconditionAtIndex(uint32_t idx) {
  const auto &instances = GetLanguageRuntimeInstances().GetInstances();
  if (idx < instances.size())
    return instances[idx].precondition_callback;
  return nullptr;
}
 
#pragma mark SystemRuntime
 
typedef PluginInstance<SystemRuntimeCreateInstance> SystemRuntimeInstance;
typedef PluginInstances<SystemRuntimeInstance> SystemRuntimeInstances;
 
static SystemRuntimeInstances &GetSystemRuntimeInstances() {
  static SystemRuntimeInstances g_instances;
  return g_instances;
}
 
bool PluginManager::RegisterPlugin(
    ConstString name, const char *description,
    SystemRuntimeCreateInstance create_callback) {
  return GetSystemRuntimeInstances().RegisterPlugin(name, description,
                                                    create_callback);
}
 
bool PluginManager::UnregisterPlugin(
    SystemRuntimeCreateInstance create_callback) {
  return GetSystemRuntimeInstances().UnregisterPlugin(create_callback);
}
 
SystemRuntimeCreateInstance
PluginManager::GetSystemRuntimeCreateCallbackAtIndex(uint32_t idx) {
  return GetSystemRuntimeInstances().GetCallbackAtIndex(idx);
}
 
#pragma mark ObjectFile
 
struct ObjectFileInstance : public PluginInstance<ObjectFileCreateInstance> {
  ObjectFileInstance(
      ConstString name, std::string description, CallbackType create_callback,
      ObjectFileCreateMemoryInstance create_memory_callback,
      ObjectFileGetModuleSpecifications get_module_specifications,
      ObjectFileSaveCore save_core)
      : PluginInstance<ObjectFileCreateInstance>(name, std::move(description),
                                                 create_callback),
        create_memory_callback(create_memory_callback),
        get_module_specifications(get_module_specifications),
        save_core(save_core) {}
 
  ObjectFileCreateMemoryInstance create_memory_callback;
  ObjectFileGetModuleSpecifications get_module_specifications;
  ObjectFileSaveCore save_core;
};
typedef PluginInstances<ObjectFileInstance> ObjectFileInstances;
 
static ObjectFileInstances &GetObjectFileInstances() {
  static ObjectFileInstances g_instances;
  return g_instances;
}
 
bool PluginManager::RegisterPlugin(
    ConstString name, const char *description,
    ObjectFileCreateInstance create_callback,
    ObjectFileCreateMemoryInstance create_memory_callback,
    ObjectFileGetModuleSpecifications get_module_specifications,
    ObjectFileSaveCore save_core) {
  return GetObjectFileInstances().RegisterPlugin(
      name, description, create_callback, create_memory_callback,
      get_module_specifications, save_core);
}
 
bool PluginManager::UnregisterPlugin(ObjectFileCreateInstance create_callback) {
  return GetObjectFileInstances().UnregisterPlugin(create_callback);
}
 
ObjectFileCreateInstance
PluginManager::GetObjectFileCreateCallbackAtIndex(uint32_t idx) {
  return GetObjectFileInstances().GetCallbackAtIndex(idx);
}
 
ObjectFileCreateMemoryInstance
PluginManager::GetObjectFileCreateMemoryCallbackAtIndex(uint32_t idx) {
  const auto &instances = GetObjectFileInstances().GetInstances();
  if (idx < instances.size())
    return instances[idx].create_memory_callback;
  return nullptr;
}
 
ObjectFileGetModuleSpecifications
PluginManager::GetObjectFileGetModuleSpecificationsCallbackAtIndex(
    uint32_t idx) {
  const auto &instances = GetObjectFileInstances().GetInstances();
  if (idx < instances.size())
    return instances[idx].get_module_specifications;
  return nullptr;
}
 
ObjectFileCreateMemoryInstance
PluginManager::GetObjectFileCreateMemoryCallbackForPluginName(
    ConstString name) {
  if (!name)
    return nullptr;
  const auto &instances = GetObjectFileInstances().GetInstances();
  for (auto &instance : instances) {
    if (instance.name == name)
      return instance.create_memory_callback;
  }
  return nullptr;
}
 
Status PluginManager::SaveCore(const lldb::ProcessSP &process_sp,
                               const FileSpec &outfile,
                               lldb::SaveCoreStyle &core_style,
                               const ConstString plugin_name) {
  if (!plugin_name) {
    // Try saving core directly from the process plugin first.
    llvm::Expected<bool> ret = process_sp->SaveCore(outfile.GetPath());
    if (!ret)
      return Status(ret.takeError());
    if (ret.get())
      return Status();
  }
 
  // Fall back to object plugins.
  Status error;
  auto &instances = GetObjectFileInstances().GetInstances();
  for (auto &instance : instances) {
    if (plugin_name && instance.name != plugin_name)
      continue;
    if (instance.save_core &&
        instance.save_core(process_sp, outfile, core_style, error))
      return error;
  }
  error.SetErrorString(
      "no ObjectFile plugins were able to save a core for this process");
  return error;
}
 
#pragma mark ObjectContainer
 
struct ObjectContainerInstance
    : public PluginInstance<ObjectContainerCreateInstance> {
  ObjectContainerInstance(
      ConstString name, std::string description, CallbackType create_callback,
      ObjectFileGetModuleSpecifications get_module_specifications)
      : PluginInstance<ObjectContainerCreateInstance>(
            name, std::move(description), create_callback),
        get_module_specifications(get_module_specifications) {}
 
  ObjectFileGetModuleSpecifications get_module_specifications;
};
typedef PluginInstances<ObjectContainerInstance> ObjectContainerInstances;
 
static ObjectContainerInstances &GetObjectContainerInstances() {
  static ObjectContainerInstances g_instances;
  return g_instances;
}
 
bool PluginManager::RegisterPlugin(
    ConstString name, const char *description,
    ObjectContainerCreateInstance create_callback,
    ObjectFileGetModuleSpecifications get_module_specifications) {
  return GetObjectContainerInstances().RegisterPlugin(
      name, description, create_callback, get_module_specifications);
}
 
bool PluginManager::UnregisterPlugin(
    ObjectContainerCreateInstance create_callback) {
  return GetObjectContainerInstances().UnregisterPlugin(create_callback);
}
 
ObjectContainerCreateInstance
PluginManager::GetObjectContainerCreateCallbackAtIndex(uint32_t idx) {
  return GetObjectContainerInstances().GetCallbackAtIndex(idx);
}
 
ObjectFileGetModuleSpecifications
PluginManager::GetObjectContainerGetModuleSpecificationsCallbackAtIndex(
    uint32_t idx) {
  const auto &instances = GetObjectContainerInstances().GetInstances();
  if (idx < instances.size())
    return instances[idx].get_module_specifications;
  return nullptr;
}
 
#pragma mark Platform
 
typedef PluginInstance<PlatformCreateInstance> PlatformInstance;
typedef PluginInstances<PlatformInstance> PlatformInstances;
 
static PlatformInstances &GetPlatformInstances() {
  static PlatformInstances g_platform_instances;
  return g_platform_instances;
}
 
bool PluginManager::RegisterPlugin(
    ConstString name, const char *description,
    PlatformCreateInstance create_callback,
    DebuggerInitializeCallback debugger_init_callback) {
  return GetPlatformInstances().RegisterPlugin(
      name, description, create_callback, debugger_init_callback);
}
 
bool PluginManager::UnregisterPlugin(PlatformCreateInstance create_callback) {
  return GetPlatformInstances().UnregisterPlugin(create_callback);
}
 
const char *PluginManager::GetPlatformPluginNameAtIndex(uint32_t idx) {
  return GetPlatformInstances().GetNameAtIndex(idx);
}
 
const char *PluginManager::GetPlatformPluginDescriptionAtIndex(uint32_t idx) {
  return GetPlatformInstances().GetDescriptionAtIndex(idx);
}
 
PlatformCreateInstance
PluginManager::GetPlatformCreateCallbackAtIndex(uint32_t idx) {
  return GetPlatformInstances().GetCallbackAtIndex(idx);
}
 
PlatformCreateInstance
PluginManager::GetPlatformCreateCallbackForPluginName(ConstString name) {
  return GetPlatformInstances().GetCallbackForName(name);
}
 
void PluginManager::AutoCompletePlatformName(llvm::StringRef name,
                                             CompletionRequest &request) {
  for (const auto &instance : GetPlatformInstances().GetInstances()) {
    if (instance.name.GetStringRef().startswith(name))
      request.AddCompletion(instance.name.GetCString());
  }
}
 
#pragma mark Process
 
typedef PluginInstance<ProcessCreateInstance> ProcessInstance;
typedef PluginInstances<ProcessInstance> ProcessInstances;
 
static ProcessInstances &GetProcessInstances() {
  static ProcessInstances g_instances;
  return g_instances;
}
 
bool PluginManager::RegisterPlugin(
    ConstString name, const char *description,
    ProcessCreateInstance create_callback,
    DebuggerInitializeCallback debugger_init_callback) {
  return GetProcessInstances().RegisterPlugin(
      name, description, create_callback, debugger_init_callback);
}
 
bool PluginManager::UnregisterPlugin(ProcessCreateInstance create_callback) {
  return GetProcessInstances().UnregisterPlugin(create_callback);
}
 
const char *PluginManager::GetProcessPluginNameAtIndex(uint32_t idx) {
  return GetProcessInstances().GetNameAtIndex(idx);
}
 
const char *PluginManager::GetProcessPluginDescriptionAtIndex(uint32_t idx) {
  return GetProcessInstances().GetDescriptionAtIndex(idx);
}
 
ProcessCreateInstance
PluginManager::GetProcessCreateCallbackAtIndex(uint32_t idx) {
  return GetProcessInstances().GetCallbackAtIndex(idx);
}
 
ProcessCreateInstance
PluginManager::GetProcessCreateCallbackForPluginName(ConstString name) {
  return GetProcessInstances().GetCallbackForName(name);
}
 
void PluginManager::AutoCompleteProcessName(llvm::StringRef name,
                                            CompletionRequest &request) {
  for (const auto &instance : GetProcessInstances().GetInstances()) {
    if (instance.name.GetStringRef().startswith(name))
      request.AddCompletion(instance.name.GetCString(), instance.description);
  }
}
 
#pragma mark ScriptInterpreter
 
struct ScriptInterpreterInstance
    : public PluginInstance<ScriptInterpreterCreateInstance> {
  ScriptInterpreterInstance(ConstString name, std::string description,
                            CallbackType create_callback,
                            lldb::ScriptLanguage language)
      : PluginInstance<ScriptInterpreterCreateInstance>(
            name, std::move(description), create_callback),
        language(language) {}
 
  lldb::ScriptLanguage language = lldb::eScriptLanguageNone;
};
 
typedef PluginInstances<ScriptInterpreterInstance> ScriptInterpreterInstances;
 
static ScriptInterpreterInstances &GetScriptInterpreterInstances() {
  static ScriptInterpreterInstances g_instances;
  return g_instances;
}
 
bool PluginManager::RegisterPlugin(
    ConstString name, const char *description,
    lldb::ScriptLanguage script_language,
    ScriptInterpreterCreateInstance create_callback) {
  return GetScriptInterpreterInstances().RegisterPlugin(
      name, description, create_callback, script_language);
}
 
bool PluginManager::UnregisterPlugin(
    ScriptInterpreterCreateInstance create_callback) {
  return GetScriptInterpreterInstances().UnregisterPlugin(create_callback);
}
 
ScriptInterpreterCreateInstance
PluginManager::GetScriptInterpreterCreateCallbackAtIndex(uint32_t idx) {
  return GetScriptInterpreterInstances().GetCallbackAtIndex(idx);
}
 
lldb::ScriptInterpreterSP
PluginManager::GetScriptInterpreterForLanguage(lldb::ScriptLanguage script_lang,
                                               Debugger &debugger) {
  const auto &instances = GetScriptInterpreterInstances().GetInstances();
  ScriptInterpreterCreateInstance none_instance = nullptr;
  for (const auto &instance : instances) {
    if (instance.language == lldb::eScriptLanguageNone)
      none_instance = instance.create_callback;
 
    if (script_lang == instance.language)
      return instance.create_callback(debugger);
  }
 
  // If we didn't find one, return the ScriptInterpreter for the null language.
  assert(none_instance != nullptr);
  return none_instance(debugger);
}
 
#pragma mark StructuredDataPlugin
 
struct StructuredDataPluginInstance
    : public PluginInstance<StructuredDataPluginCreateInstance> {
  StructuredDataPluginInstance(
      ConstString name, std::string description, CallbackType create_callback,
      DebuggerInitializeCallback debugger_init_callback,
      StructuredDataFilterLaunchInfo filter_callback)
      : PluginInstance<StructuredDataPluginCreateInstance>(
            name, std::move(description), create_callback,
            debugger_init_callback),
        filter_callback(filter_callback) {}
 
  StructuredDataFilterLaunchInfo filter_callback = nullptr;
};
 
typedef PluginInstances<StructuredDataPluginInstance>
    StructuredDataPluginInstances;
 
static StructuredDataPluginInstances &GetStructuredDataPluginInstances() {
  static StructuredDataPluginInstances g_instances;
  return g_instances;
}
 
bool PluginManager::RegisterPlugin(
    ConstString name, const char *description,
    StructuredDataPluginCreateInstance create_callback,
    DebuggerInitializeCallback debugger_init_callback,
    StructuredDataFilterLaunchInfo filter_callback) {
  return GetStructuredDataPluginInstances().RegisterPlugin(
      name, description, create_callback, debugger_init_callback,
      filter_callback);
}
 
bool PluginManager::UnregisterPlugin(
    StructuredDataPluginCreateInstance create_callback) {
  return GetStructuredDataPluginInstances().UnregisterPlugin(create_callback);
}
 
StructuredDataPluginCreateInstance
PluginManager::GetStructuredDataPluginCreateCallbackAtIndex(uint32_t idx) {
  return GetStructuredDataPluginInstances().GetCallbackAtIndex(idx);
}
 
StructuredDataFilterLaunchInfo
PluginManager::GetStructuredDataFilterCallbackAtIndex(
    uint32_t idx, bool &iteration_complete) {
  const auto &instances = GetStructuredDataPluginInstances().GetInstances();
  if (idx < instances.size()) {
    iteration_complete = false;
    return instances[idx].filter_callback;
  } else {
    iteration_complete = true;
  }
  return nullptr;
}
 
#pragma mark SymbolFile
 
typedef PluginInstance<SymbolFileCreateInstance> SymbolFileInstance;
typedef PluginInstances<SymbolFileInstance> SymbolFileInstances;
 
static SymbolFileInstances &GetSymbolFileInstances() {
  static SymbolFileInstances g_instances;
  return g_instances;
}
 
bool PluginManager::RegisterPlugin(
    ConstString name, const char *description,
    SymbolFileCreateInstance create_callback,
    DebuggerInitializeCallback debugger_init_callback) {
  return GetSymbolFileInstances().RegisterPlugin(
      name, description, create_callback, debugger_init_callback);
}
 
bool PluginManager::UnregisterPlugin(SymbolFileCreateInstance create_callback) {
  return GetSymbolFileInstances().UnregisterPlugin(create_callback);
}
 
SymbolFileCreateInstance
PluginManager::GetSymbolFileCreateCallbackAtIndex(uint32_t idx) {
  return GetSymbolFileInstances().GetCallbackAtIndex(idx);
}
 
#pragma mark SymbolVendor
 
typedef PluginInstance<SymbolVendorCreateInstance> SymbolVendorInstance;
typedef PluginInstances<SymbolVendorInstance> SymbolVendorInstances;
 
static SymbolVendorInstances &GetSymbolVendorInstances() {
  static SymbolVendorInstances g_instances;
  return g_instances;
}
 
bool PluginManager::RegisterPlugin(ConstString name, const char *description,
                                   SymbolVendorCreateInstance create_callback) {
  return GetSymbolVendorInstances().RegisterPlugin(name, description,
                                                   create_callback);
}
 
bool PluginManager::UnregisterPlugin(
    SymbolVendorCreateInstance create_callback) {
  return GetSymbolVendorInstances().UnregisterPlugin(create_callback);
}
 
SymbolVendorCreateInstance
PluginManager::GetSymbolVendorCreateCallbackAtIndex(uint32_t idx) {
  return GetSymbolVendorInstances().GetCallbackAtIndex(idx);
}
 
#pragma mark Trace
 
struct TraceInstance
    : public PluginInstance<TraceCreateInstanceForSessionFile> {
  TraceInstance(
      ConstString name, std::string description,
      CallbackType create_callback_for_session_file,
      TraceCreateInstanceForLiveProcess create_callback_for_live_process,
      llvm::StringRef schema)
      : PluginInstance<TraceCreateInstanceForSessionFile>(
            name, std::move(description), create_callback_for_session_file),
        schema(schema),
        create_callback_for_live_process(create_callback_for_live_process) {}
 
  llvm::StringRef schema;
  TraceCreateInstanceForLiveProcess create_callback_for_live_process;
};
 
typedef PluginInstances<TraceInstance> TraceInstances;
 
static TraceInstances &GetTracePluginInstances() {
  static TraceInstances g_instances;
  return g_instances;
}
 
bool PluginManager::RegisterPlugin(
    ConstString name, const char *description,
    TraceCreateInstanceForSessionFile create_callback_for_session_file,
    TraceCreateInstanceForLiveProcess create_callback_for_live_process,
    llvm::StringRef schema) {
  return GetTracePluginInstances().RegisterPlugin(
      name, description, create_callback_for_session_file,
      create_callback_for_live_process, schema);
}
 
bool PluginManager::UnregisterPlugin(
    TraceCreateInstanceForSessionFile create_callback_for_session_file) {
  return GetTracePluginInstances().UnregisterPlugin(
      create_callback_for_session_file);
}
 
TraceCreateInstanceForSessionFile
PluginManager::GetTraceCreateCallback(ConstString plugin_name) {
  return GetTracePluginInstances().GetCallbackForName(plugin_name);
}
 
TraceCreateInstanceForLiveProcess
PluginManager::GetTraceCreateCallbackForLiveProcess(ConstString plugin_name) {
  for (const TraceInstance &instance : GetTracePluginInstances().GetInstances())
    if (instance.name == plugin_name)
      return instance.create_callback_for_live_process;
  return nullptr;
}
 
llvm::StringRef PluginManager::GetTraceSchema(ConstString plugin_name) {
  for (const TraceInstance &instance : GetTracePluginInstances().GetInstances())
    if (instance.name == plugin_name)
      return instance.schema;
  return llvm::StringRef();
}
 
llvm::StringRef PluginManager::GetTraceSchema(size_t index) {
  if (TraceInstance *instance =
          GetTracePluginInstances().GetInstanceAtIndex(index))
    return instance->schema;
  return llvm::StringRef();
}
 
#pragma mark TraceExporter
 
struct TraceExporterInstance
    : public PluginInstance<TraceExporterCreateInstance> {
  TraceExporterInstance(
      ConstString name, std::string description,
      TraceExporterCreateInstance create_instance,
      ThreadTraceExportCommandCreator create_thread_trace_export_command)
      : PluginInstance<TraceExporterCreateInstance>(
            name, std::move(description), create_instance),
        create_thread_trace_export_command(create_thread_trace_export_command) {
  }
 
  ThreadTraceExportCommandCreator create_thread_trace_export_command;
};
 
typedef PluginInstances<TraceExporterInstance> TraceExporterInstances;
 
static TraceExporterInstances &GetTraceExporterInstances() {
  static TraceExporterInstances g_instances;
  return g_instances;
}
 
bool PluginManager::RegisterPlugin(
    ConstString name, const char *description,
    TraceExporterCreateInstance create_callback,
    ThreadTraceExportCommandCreator create_thread_trace_export_command) {
  return GetTraceExporterInstances().RegisterPlugin(
      name, description, create_callback, create_thread_trace_export_command);
}
 
TraceExporterCreateInstance
PluginManager::GetTraceExporterCreateCallback(ConstString plugin_name) {
  return GetTraceExporterInstances().GetCallbackForName(plugin_name);
}
 
bool PluginManager::UnregisterPlugin(
    TraceExporterCreateInstance create_callback) {
  return GetTraceExporterInstances().UnregisterPlugin(create_callback);
}
 
ThreadTraceExportCommandCreator
PluginManager::GetThreadTraceExportCommandCreatorAtIndex(uint32_t index) {
  if (TraceExporterInstance *instance =
          GetTraceExporterInstances().GetInstanceAtIndex(index))
    return instance->create_thread_trace_export_command;
  return nullptr;
}
 
const char *PluginManager::GetTraceExporterPluginNameAtIndex(uint32_t index) {
  return GetTraceExporterInstances().GetNameAtIndex(index);
}
 
#pragma mark UnwindAssembly
 
typedef PluginInstance<UnwindAssemblyCreateInstance> UnwindAssemblyInstance;
typedef PluginInstances<UnwindAssemblyInstance> UnwindAssemblyInstances;
 
static UnwindAssemblyInstances &GetUnwindAssemblyInstances() {
  static UnwindAssemblyInstances g_instances;
  return g_instances;
}
 
bool PluginManager::RegisterPlugin(
    ConstString name, const char *description,
    UnwindAssemblyCreateInstance create_callback) {
  return GetUnwindAssemblyInstances().RegisterPlugin(name, description,
                                                     create_callback);
}
 
bool PluginManager::UnregisterPlugin(
    UnwindAssemblyCreateInstance create_callback) {
  return GetUnwindAssemblyInstances().UnregisterPlugin(create_callback);
}
 
UnwindAssemblyCreateInstance
PluginManager::GetUnwindAssemblyCreateCallbackAtIndex(uint32_t idx) {
  return GetUnwindAssemblyInstances().GetCallbackAtIndex(idx);
}
 
#pragma mark MemoryHistory
 
typedef PluginInstance<MemoryHistoryCreateInstance> MemoryHistoryInstance;
typedef PluginInstances<MemoryHistoryInstance> MemoryHistoryInstances;
 
static MemoryHistoryInstances &GetMemoryHistoryInstances() {
  static MemoryHistoryInstances g_instances;
  return g_instances;
}
 
bool PluginManager::RegisterPlugin(
    ConstString name, const char *description,
    MemoryHistoryCreateInstance create_callback) {
  return GetMemoryHistoryInstances().RegisterPlugin(name, description,
                                                    create_callback);
}
 
bool PluginManager::UnregisterPlugin(
    MemoryHistoryCreateInstance create_callback) {
  return GetMemoryHistoryInstances().UnregisterPlugin(create_callback);
}
 
MemoryHistoryCreateInstance
PluginManager::GetMemoryHistoryCreateCallbackAtIndex(uint32_t idx) {
  return GetMemoryHistoryInstances().GetCallbackAtIndex(idx);
}
 
#pragma mark InstrumentationRuntime
 
struct InstrumentationRuntimeInstance
    : public PluginInstance<InstrumentationRuntimeCreateInstance> {
  InstrumentationRuntimeInstance(
      ConstString name, std::string description, CallbackType create_callback,
      InstrumentationRuntimeGetType get_type_callback)
      : PluginInstance<InstrumentationRuntimeCreateInstance>(
            name, std::move(description), create_callback),
        get_type_callback(get_type_callback) {}
 
  InstrumentationRuntimeGetType get_type_callback = nullptr;
};
 
typedef PluginInstances<InstrumentationRuntimeInstance>
    InstrumentationRuntimeInstances;
 
static InstrumentationRuntimeInstances &GetInstrumentationRuntimeInstances() {
  static InstrumentationRuntimeInstances g_instances;
  return g_instances;
}
 
bool PluginManager::RegisterPlugin(
    ConstString name, const char *description,
    InstrumentationRuntimeCreateInstance create_callback,
    InstrumentationRuntimeGetType get_type_callback) {
  return GetInstrumentationRuntimeInstances().RegisterPlugin(
      name, description, create_callback, get_type_callback);
}
 
bool PluginManager::UnregisterPlugin(
    InstrumentationRuntimeCreateInstance create_callback) {
  return GetInstrumentationRuntimeInstances().UnregisterPlugin(create_callback);
}
 
InstrumentationRuntimeGetType
PluginManager::GetInstrumentationRuntimeGetTypeCallbackAtIndex(uint32_t idx) {
  const auto &instances = GetInstrumentationRuntimeInstances().GetInstances();
  if (idx < instances.size())
    return instances[idx].get_type_callback;
  return nullptr;
}
 
InstrumentationRuntimeCreateInstance
PluginManager::GetInstrumentationRuntimeCreateCallbackAtIndex(uint32_t idx) {
  return GetInstrumentationRuntimeInstances().GetCallbackAtIndex(idx);
}
 
#pragma mark TypeSystem
 
struct TypeSystemInstance : public PluginInstance<TypeSystemCreateInstance> {
  TypeSystemInstance(ConstString name, std::string description,
                     CallbackType create_callback,
                     LanguageSet supported_languages_for_types,
                     LanguageSet supported_languages_for_expressions)
      : PluginInstance<TypeSystemCreateInstance>(name, std::move(description),
                                                 create_callback),
        supported_languages_for_types(supported_languages_for_types),
        supported_languages_for_expressions(
            supported_languages_for_expressions) {}
 
  LanguageSet supported_languages_for_types;
  LanguageSet supported_languages_for_expressions;
};
 
typedef PluginInstances<TypeSystemInstance> TypeSystemInstances;
 
static TypeSystemInstances &GetTypeSystemInstances() {
  static TypeSystemInstances g_instances;
  return g_instances;
}
 
bool PluginManager::RegisterPlugin(
    ConstString name, const char *description,
    TypeSystemCreateInstance create_callback,
    LanguageSet supported_languages_for_types,
    LanguageSet supported_languages_for_expressions) {
  return GetTypeSystemInstances().RegisterPlugin(
      name, description, create_callback, supported_languages_for_types,
      supported_languages_for_expressions);
}
 
bool PluginManager::UnregisterPlugin(TypeSystemCreateInstance create_callback) {
  return GetTypeSystemInstances().UnregisterPlugin(create_callback);
}
 
TypeSystemCreateInstance
PluginManager::GetTypeSystemCreateCallbackAtIndex(uint32_t idx) {
  return GetTypeSystemInstances().GetCallbackAtIndex(idx);
}
 
LanguageSet PluginManager::GetAllTypeSystemSupportedLanguagesForTypes() {
  const auto &instances = GetTypeSystemInstances().GetInstances();
  LanguageSet all;
  for (unsigned i = 0; i < instances.size(); ++i)
    all.bitvector |= instances[i].supported_languages_for_types.bitvector;
  return all;
}
 
LanguageSet PluginManager::GetAllTypeSystemSupportedLanguagesForExpressions() {
  const auto &instances = GetTypeSystemInstances().GetInstances();
  LanguageSet all;
  for (unsigned i = 0; i < instances.size(); ++i)
    all.bitvector |= instances[i].supported_languages_for_expressions.bitvector;
  return all;
}
 
#pragma mark REPL
 
struct REPLInstance : public PluginInstance<REPLCreateInstance> {
  REPLInstance(ConstString name, std::string description,
               CallbackType create_callback, LanguageSet supported_languages)
      : PluginInstance<REPLCreateInstance>(name, std::move(description),
                                           create_callback),
        supported_languages(supported_languages) {}
 
  LanguageSet supported_languages;
};
 
typedef PluginInstances<REPLInstance> REPLInstances;
 
static REPLInstances &GetREPLInstances() {
  static REPLInstances g_instances;
  return g_instances;
}
 
bool PluginManager::RegisterPlugin(ConstString name, const char *description,
                                   REPLCreateInstance create_callback,
                                   LanguageSet supported_languages) {
  return GetREPLInstances().RegisterPlugin(name, description, create_callback,
                                           supported_languages);
}
 
bool PluginManager::UnregisterPlugin(REPLCreateInstance create_callback) {
  return GetREPLInstances().UnregisterPlugin(create_callback);
}
 
REPLCreateInstance PluginManager::GetREPLCreateCallbackAtIndex(uint32_t idx) {
  return GetREPLInstances().GetCallbackAtIndex(idx);
}
 
LanguageSet PluginManager::GetREPLAllTypeSystemSupportedLanguages() {
  const auto &instances = GetREPLInstances().GetInstances();
  LanguageSet all;
  for (unsigned i = 0; i < instances.size(); ++i)
    all.bitvector |= instances[i].supported_languages.bitvector;
  return all;
}
 
#pragma mark PluginManager
 
void PluginManager::DebuggerInitialize(Debugger &debugger) {
  GetDynamicLoaderInstances().PerformDebuggerCallback(debugger);
  GetJITLoaderInstances().PerformDebuggerCallback(debugger);
  GetPlatformInstances().PerformDebuggerCallback(debugger);
  GetProcessInstances().PerformDebuggerCallback(debugger);
  GetSymbolFileInstances().PerformDebuggerCallback(debugger);
  GetOperatingSystemInstances().PerformDebuggerCallback(debugger);
  GetStructuredDataPluginInstances().PerformDebuggerCallback(debugger);
  GetTracePluginInstances().PerformDebuggerCallback(debugger);
}
 
// This is the preferred new way to register plugin specific settings.  e.g.
// This will put a plugin's settings under e.g.
// "plugin.<plugin_type_name>.<plugin_type_desc>.SETTINGNAME".
static lldb::OptionValuePropertiesSP
GetDebuggerPropertyForPlugins(Debugger &debugger, ConstString plugin_type_name,
                              ConstString plugin_type_desc, bool can_create) {
  lldb::OptionValuePropertiesSP parent_properties_sp(
      debugger.GetValueProperties());
  if (parent_properties_sp) {
    static ConstString g_property_name("plugin");
 
    OptionValuePropertiesSP plugin_properties_sp =
        parent_properties_sp->GetSubProperty(nullptr, g_property_name);
    if (!plugin_properties_sp && can_create) {
      plugin_properties_sp =
          std::make_shared<OptionValueProperties>(g_property_name);
      parent_properties_sp->AppendProperty(
          g_property_name, ConstString("Settings specify to plugins."), true,
          plugin_properties_sp);
    }
 
    if (plugin_properties_sp) {
      lldb::OptionValuePropertiesSP plugin_type_properties_sp =
          plugin_properties_sp->GetSubProperty(nullptr, plugin_type_name);
      if (!plugin_type_properties_sp && can_create) {
        plugin_type_properties_sp =
            std::make_shared<OptionValueProperties>(plugin_type_name);
        plugin_properties_sp->AppendProperty(plugin_type_name, plugin_type_desc,
                                             true, plugin_type_properties_sp);
      }
      return plugin_type_properties_sp;
    }
  }
  return lldb::OptionValuePropertiesSP();
}
 
// This is deprecated way to register plugin specific settings.  e.g.
// "<plugin_type_name>.plugin.<plugin_type_desc>.SETTINGNAME" and Platform
// generic settings would be under "platform.SETTINGNAME".
static lldb::OptionValuePropertiesSP GetDebuggerPropertyForPluginsOldStyle(
    Debugger &debugger, ConstString plugin_type_name,
    ConstString plugin_type_desc, bool can_create) {
  static ConstString g_property_name("plugin");
  lldb::OptionValuePropertiesSP parent_properties_sp(
      debugger.GetValueProperties());
  if (parent_properties_sp) {
    OptionValuePropertiesSP plugin_properties_sp =
        parent_properties_sp->GetSubProperty(nullptr, plugin_type_name);
    if (!plugin_properties_sp && can_create) {
      plugin_properties_sp =
          std::make_shared<OptionValueProperties>(plugin_type_name);
      parent_properties_sp->AppendProperty(plugin_type_name, plugin_type_desc,
                                           true, plugin_properties_sp);
    }
 
    if (plugin_properties_sp) {
      lldb::OptionValuePropertiesSP plugin_type_properties_sp =
          plugin_properties_sp->GetSubProperty(nullptr, g_property_name);
      if (!plugin_type_properties_sp && can_create) {
        plugin_type_properties_sp =
            std::make_shared<OptionValueProperties>(g_property_name);
        plugin_properties_sp->AppendProperty(
            g_property_name, ConstString("Settings specific to plugins"), true,
            plugin_type_properties_sp);
      }
      return plugin_type_properties_sp;
    }
  }
  return lldb::OptionValuePropertiesSP();
}
 
namespace {
 
typedef lldb::OptionValuePropertiesSP
GetDebuggerPropertyForPluginsPtr(Debugger &, ConstString, ConstString,
                                 bool can_create);
 
lldb::OptionValuePropertiesSP
GetSettingForPlugin(Debugger &debugger, ConstString setting_name,
                    ConstString plugin_type_name,
                    GetDebuggerPropertyForPluginsPtr get_debugger_property =
                        GetDebuggerPropertyForPlugins) {
  lldb::OptionValuePropertiesSP properties_sp;
  lldb::OptionValuePropertiesSP plugin_type_properties_sp(get_debugger_property(
      debugger, plugin_type_name,
      ConstString(), // not creating to so we don't need the description
      false));
  if (plugin_type_properties_sp)
    properties_sp =
        plugin_type_properties_sp->GetSubProperty(nullptr, setting_name);
  return properties_sp;
}
 
bool CreateSettingForPlugin(
    Debugger &debugger, ConstString plugin_type_name,
    ConstString plugin_type_desc,
    const lldb::OptionValuePropertiesSP &properties_sp, ConstString description,
    bool is_global_property,
    GetDebuggerPropertyForPluginsPtr get_debugger_property =
        GetDebuggerPropertyForPlugins) {
  if (properties_sp) {
    lldb::OptionValuePropertiesSP plugin_type_properties_sp(
        get_debugger_property(debugger, plugin_type_name, plugin_type_desc,
                              true));
    if (plugin_type_properties_sp) {
      plugin_type_properties_sp->AppendProperty(properties_sp->GetName(),
                                                description, is_global_property,
                                                properties_sp);
      return true;
    }
  }
  return false;
}
 
const char *kDynamicLoaderPluginName("dynamic-loader");
const char *kPlatformPluginName("platform");
const char *kProcessPluginName("process");
const char *kSymbolFilePluginName("symbol-file");
const char *kJITLoaderPluginName("jit-loader");
const char *kStructuredDataPluginName("structured-data");
 
} // anonymous namespace
 
lldb::OptionValuePropertiesSP
PluginManager::GetSettingForDynamicLoaderPlugin(Debugger &debugger,
                                                ConstString setting_name) {
  return GetSettingForPlugin(debugger, setting_name,
                             ConstString(kDynamicLoaderPluginName));
}
 
bool PluginManager::CreateSettingForDynamicLoaderPlugin(
    Debugger &debugger, const lldb::OptionValuePropertiesSP &properties_sp,
    ConstString description, bool is_global_property) {
  return CreateSettingForPlugin(
      debugger, ConstString(kDynamicLoaderPluginName),
      ConstString("Settings for dynamic loader plug-ins"), properties_sp,
      description, is_global_property);
}
 
lldb::OptionValuePropertiesSP
PluginManager::GetSettingForPlatformPlugin(Debugger &debugger,
                                           ConstString setting_name) {
  return GetSettingForPlugin(debugger, setting_name,
                             ConstString(kPlatformPluginName),
                             GetDebuggerPropertyForPluginsOldStyle);
}
 
bool PluginManager::CreateSettingForPlatformPlugin(
    Debugger &debugger, const lldb::OptionValuePropertiesSP &properties_sp,
    ConstString description, bool is_global_property) {
  return CreateSettingForPlugin(debugger, ConstString(kPlatformPluginName),
                                ConstString("Settings for platform plug-ins"),
                                properties_sp, description, is_global_property,
                                GetDebuggerPropertyForPluginsOldStyle);
}
 
lldb::OptionValuePropertiesSP
PluginManager::GetSettingForProcessPlugin(Debugger &debugger,
                                          ConstString setting_name) {
  return GetSettingForPlugin(debugger, setting_name,
                             ConstString(kProcessPluginName));
}
 
bool PluginManager::CreateSettingForProcessPlugin(
    Debugger &debugger, const lldb::OptionValuePropertiesSP &properties_sp,
    ConstString description, bool is_global_property) {
  return CreateSettingForPlugin(debugger, ConstString(kProcessPluginName),
                                ConstString("Settings for process plug-ins"),
                                properties_sp, description, is_global_property);
}
 
lldb::OptionValuePropertiesSP
PluginManager::GetSettingForSymbolFilePlugin(Debugger &debugger,
                                             ConstString setting_name) {
  return GetSettingForPlugin(debugger, setting_name,
                             ConstString(kSymbolFilePluginName));
}
 
bool PluginManager::CreateSettingForSymbolFilePlugin(
    Debugger &debugger, const lldb::OptionValuePropertiesSP &properties_sp,
    ConstString description, bool is_global_property) {
  return CreateSettingForPlugin(
      debugger, ConstString(kSymbolFilePluginName),
      ConstString("Settings for symbol file plug-ins"), properties_sp,
      description, is_global_property);
}
 
lldb::OptionValuePropertiesSP
PluginManager::GetSettingForJITLoaderPlugin(Debugger &debugger,
                                            ConstString setting_name) {
  return GetSettingForPlugin(debugger, setting_name,
                             ConstString(kJITLoaderPluginName));
}
 
bool PluginManager::CreateSettingForJITLoaderPlugin(
    Debugger &debugger, const lldb::OptionValuePropertiesSP &properties_sp,
    ConstString description, bool is_global_property) {
  return CreateSettingForPlugin(debugger, ConstString(kJITLoaderPluginName),
                                ConstString("Settings for JIT loader plug-ins"),
                                properties_sp, description, is_global_property);
}
 
static const char *kOperatingSystemPluginName("os");
 
lldb::OptionValuePropertiesSP
PluginManager::GetSettingForOperatingSystemPlugin(Debugger &debugger,
                                                  ConstString setting_name) {
  lldb::OptionValuePropertiesSP properties_sp;
  lldb::OptionValuePropertiesSP plugin_type_properties_sp(
      GetDebuggerPropertyForPlugins(
          debugger, ConstString(kOperatingSystemPluginName),
          ConstString(), // not creating to so we don't need the description
          false));
  if (plugin_type_properties_sp)
    properties_sp =
        plugin_type_properties_sp->GetSubProperty(nullptr, setting_name);
  return properties_sp;
}
 
bool PluginManager::CreateSettingForOperatingSystemPlugin(
    Debugger &debugger, const lldb::OptionValuePropertiesSP &properties_sp,
    ConstString description, bool is_global_property) {
  if (properties_sp) {
    lldb::OptionValuePropertiesSP plugin_type_properties_sp(
        GetDebuggerPropertyForPlugins(
            debugger, ConstString(kOperatingSystemPluginName),
            ConstString("Settings for operating system plug-ins"), true));
    if (plugin_type_properties_sp) {
      plugin_type_properties_sp->AppendProperty(properties_sp->GetName(),
                                                description, is_global_property,
                                                properties_sp);
      return true;
    }
  }
  return false;
}
 
lldb::OptionValuePropertiesSP
PluginManager::GetSettingForStructuredDataPlugin(Debugger &debugger,
                                                 ConstString setting_name) {
  return GetSettingForPlugin(debugger, setting_name,
                             ConstString(kStructuredDataPluginName));
}
 
bool PluginManager::CreateSettingForStructuredDataPlugin(
    Debugger &debugger, const lldb::OptionValuePropertiesSP &properties_sp,
    ConstString description, bool is_global_property) {
  return CreateSettingForPlugin(
      debugger, ConstString(kStructuredDataPluginName),
      ConstString("Settings for structured data plug-ins"), properties_sp,
      description, is_global_property);
}