Target.cpp

//===-- Target.cpp ----------------------------------------------*- C++ -*-===//
//
// 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/Target/Target.h"
#include "Plugins/ExpressionParser/Clang/ClangASTSource.h"
#include "Plugins/ExpressionParser/Clang/ClangModulesDeclVendor.h"
#include "Plugins/ExpressionParser/Clang/ClangPersistentVariables.h"
#include "lldb/Breakpoint/BreakpointIDList.h"
#include "lldb/Breakpoint/BreakpointResolver.h"
#include "lldb/Breakpoint/BreakpointResolverAddress.h"
#include "lldb/Breakpoint/BreakpointResolverFileLine.h"
#include "lldb/Breakpoint/BreakpointResolverFileRegex.h"
#include "lldb/Breakpoint/BreakpointResolverName.h"
#include "lldb/Breakpoint/BreakpointResolverScripted.h"
#include "lldb/Breakpoint/Watchpoint.h"
#include "lldb/Core/Debugger.h"
#include "lldb/Core/Module.h"
#include "lldb/Core/ModuleSpec.h"
#include "lldb/Core/PluginManager.h"
#include "lldb/Core/SearchFilter.h"
#include "lldb/Core/Section.h"
#include "lldb/Core/SourceManager.h"
#include "lldb/Core/StreamFile.h"
#include "lldb/Core/StructuredDataImpl.h"
#include "lldb/Core/ValueObject.h"
#include "lldb/Expression/REPL.h"
#include "lldb/Expression/UserExpression.h"
#include "lldb/Host/Host.h"
#include "lldb/Host/PosixApi.h"
#include "lldb/Interpreter/CommandInterpreter.h"
#include "lldb/Interpreter/CommandReturnObject.h"
#include "lldb/Interpreter/OptionGroupWatchpoint.h"
#include "lldb/Interpreter/OptionValues.h"
#include "lldb/Interpreter/Property.h"
#include "lldb/Symbol/ClangASTContext.h"
#include "lldb/Symbol/Function.h"
#include "lldb/Symbol/ObjectFile.h"
#include "lldb/Symbol/Symbol.h"
#include "lldb/Target/Language.h"
#include "lldb/Target/LanguageRuntime.h"
#include "lldb/Target/ObjCLanguageRuntime.h"
#include "lldb/Target/Process.h"
#include "lldb/Target/SectionLoadList.h"
#include "lldb/Target/StackFrame.h"
#include "lldb/Target/SystemRuntime.h"
#include "lldb/Target/Thread.h"
#include "lldb/Target/ThreadSpec.h"
#include "lldb/Utility/Event.h"
#include "lldb/Utility/FileSpec.h"
#include "lldb/Utility/LLDBAssert.h"
#include "lldb/Utility/Log.h"
#include "lldb/Utility/State.h"
#include "lldb/Utility/StreamString.h"
#include "lldb/Utility/Timer.h"

#include <memory>
#include <mutex>

using namespace lldb;
using namespace lldb_private;

constexpr std::chrono::milliseconds EvaluateExpressionOptions::default_timeout;

Target::Arch::Arch(const ArchSpec &spec)
    : m_spec(spec),
      m_plugin_up(PluginManager::CreateArchitectureInstance(spec)) {}

const Target::Arch& Target::Arch::operator=(const ArchSpec &spec) {
  m_spec = spec;
  m_plugin_up = PluginManager::CreateArchitectureInstance(spec);
  return *this;
}

ConstString &Target::GetStaticBroadcasterClass() {
  static ConstString class_name("lldb.target");
  return class_name;
}

Target::Target(Debugger &debugger, const ArchSpec &target_arch,
               const lldb::PlatformSP &platform_sp, bool is_dummy_target)
    : TargetProperties(this),
      Broadcaster(debugger.GetBroadcasterManager(),
                  Target::GetStaticBroadcasterClass().AsCString()),
      ExecutionContextScope(), m_debugger(debugger), m_platform_sp(platform_sp),
      m_mutex(), m_arch(target_arch), m_images(this), m_section_load_history(),
      m_breakpoint_list(false), m_internal_breakpoint_list(true),
      m_watchpoint_list(), m_process_sp(), m_search_filter_sp(),
      m_image_search_paths(ImageSearchPathsChanged, this), m_ast_importer_sp(),
      m_source_manager_up(), m_stop_hooks(), m_stop_hook_next_id(0),
      m_valid(true), m_suppress_stop_hooks(false),
      m_is_dummy_target(is_dummy_target),
      m_stats_storage(static_cast<int>(StatisticKind::StatisticMax))

{
  SetEventName(eBroadcastBitBreakpointChanged, "breakpoint-changed");
  SetEventName(eBroadcastBitModulesLoaded, "modules-loaded");
  SetEventName(eBroadcastBitModulesUnloaded, "modules-unloaded");
  SetEventName(eBroadcastBitWatchpointChanged, "watchpoint-changed");
  SetEventName(eBroadcastBitSymbolsLoaded, "symbols-loaded");

  CheckInWithManager();

  Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_OBJECT));
  if (log)
    log->Printf("%p Target::Target()", static_cast<void *>(this));
  if (target_arch.IsValid()) {
    LogIfAnyCategoriesSet(LIBLLDB_LOG_TARGET,
                          "Target::Target created with architecture %s (%s)",
                          target_arch.GetArchitectureName(),
                          target_arch.GetTriple().getTriple().c_str());
  }
}

Target::~Target() {
  Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_OBJECT));
  if (log)
    log->Printf("%p Target::~Target()", static_cast<void *>(this));
  DeleteCurrentProcess();
}

void Target::PrimeFromDummyTarget(Target *target) {
  if (!target)
    return;

  m_stop_hooks = target->m_stop_hooks;

  for (BreakpointSP breakpoint_sp : target->m_breakpoint_list.Breakpoints()) {
    if (breakpoint_sp->IsInternal())
      continue;

    BreakpointSP new_bp(new Breakpoint(*this, *breakpoint_sp.get()));
    AddBreakpoint(new_bp, false);
  }
  
  for (auto bp_name_entry : target->m_breakpoint_names)
  {
    
    BreakpointName *new_bp_name = new BreakpointName(*bp_name_entry.second);
    AddBreakpointName(new_bp_name);
  }
}

void Target::Dump(Stream *s, lldb::DescriptionLevel description_level) {
  //    s->Printf("%.*p: ", (int)sizeof(void*) * 2, this);
  if (description_level != lldb::eDescriptionLevelBrief) {
    s->Indent();
    s->PutCString("Target\n");
    s->IndentMore();
    m_images.Dump(s);
    m_breakpoint_list.Dump(s);
    m_internal_breakpoint_list.Dump(s);
    s->IndentLess();
  } else {
    Module *exe_module = GetExecutableModulePointer();
    if (exe_module)
      s->PutCString(exe_module->GetFileSpec().GetFilename().GetCString());
    else
      s->PutCString("No executable module.");
  }
}

void Target::CleanupProcess() {
  // Do any cleanup of the target we need to do between process instances.
  // NB It is better to do this before destroying the process in case the
  // clean up needs some help from the process.
  m_breakpoint_list.ClearAllBreakpointSites();
  m_internal_breakpoint_list.ClearAllBreakpointSites();
  // Disable watchpoints just on the debugger side.
  std::unique_lock<std::recursive_mutex> lock;
  this->GetWatchpointList().GetListMutex(lock);
  DisableAllWatchpoints(false);
  ClearAllWatchpointHitCounts();
  ClearAllWatchpointHistoricValues();
}

void Target::DeleteCurrentProcess() {
  if (m_process_sp) {
    m_section_load_history.Clear();
    if (m_process_sp->IsAlive())
      m_process_sp->Destroy(false);

    m_process_sp->Finalize();

    CleanupProcess();

    m_process_sp.reset();
  }
}

const lldb::ProcessSP &Target::CreateProcess(ListenerSP listener_sp,
                                             llvm::StringRef plugin_name,
                                             const FileSpec *crash_file) {
  if (!listener_sp)
    listener_sp = GetDebugger().GetListener();
  DeleteCurrentProcess();
  m_process_sp = Process::FindPlugin(shared_from_this(), plugin_name,
                                     listener_sp, crash_file);
  return m_process_sp;
}

const lldb::ProcessSP &Target::GetProcessSP() const { return m_process_sp; }

lldb::REPLSP Target::GetREPL(Status &err, lldb::LanguageType language,
                             const char *repl_options, bool can_create) {
  if (language == eLanguageTypeUnknown) {
    std::set<LanguageType> repl_languages;

    Language::GetLanguagesSupportingREPLs(repl_languages);

    if (repl_languages.size() == 1) {
      language = *repl_languages.begin();
    } else if (repl_languages.size() == 0) {
      err.SetErrorStringWithFormat(
          "LLDB isn't configured with REPL support for any languages.");
      return REPLSP();
    } else {
      err.SetErrorStringWithFormat(
          "Multiple possible REPL languages.  Please specify a language.");
      return REPLSP();
    }
  }

  REPLMap::iterator pos = m_repl_map.find(language);

  if (pos != m_repl_map.end()) {
    return pos->second;
  }

  if (!can_create) {
    err.SetErrorStringWithFormat(
        "Couldn't find an existing REPL for %s, and can't create a new one",
        Language::GetNameForLanguageType(language));
    return lldb::REPLSP();
  }

  Debugger *const debugger = nullptr;
  lldb::REPLSP ret = REPL::Create(err, language, debugger, this, repl_options);

  if (ret) {
    m_repl_map[language] = ret;
    return m_repl_map[language];
  }

  if (err.Success()) {
    err.SetErrorStringWithFormat("Couldn't create a REPL for %s",
                                 Language::GetNameForLanguageType(language));
  }

  return lldb::REPLSP();
}

void Target::SetREPL(lldb::LanguageType language, lldb::REPLSP repl_sp) {
  lldbassert(!m_repl_map.count(language));

  m_repl_map[language] = repl_sp;
}

void Target::Destroy() {
  std::lock_guard<std::recursive_mutex> guard(m_mutex);
  m_valid = false;
  DeleteCurrentProcess();
  m_platform_sp.reset();
  m_arch = ArchSpec();
  ClearModules(true);
  m_section_load_history.Clear();
  const bool notify = false;
  m_breakpoint_list.RemoveAll(notify);
  m_internal_breakpoint_list.RemoveAll(notify);
  m_last_created_breakpoint.reset();
  m_last_created_watchpoint.reset();
  m_search_filter_sp.reset();
  m_image_search_paths.Clear(notify);
  m_stop_hooks.clear();
  m_stop_hook_next_id = 0;
  m_suppress_stop_hooks = false;
}

BreakpointList &Target::GetBreakpointList(bool internal) {
  if (internal)
    return m_internal_breakpoint_list;
  else
    return m_breakpoint_list;
}

const BreakpointList &Target::GetBreakpointList(bool internal) const {
  if (internal)
    return m_internal_breakpoint_list;
  else
    return m_breakpoint_list;
}

BreakpointSP Target::GetBreakpointByID(break_id_t break_id) {
  BreakpointSP bp_sp;

  if (LLDB_BREAK_ID_IS_INTERNAL(break_id))
    bp_sp = m_internal_breakpoint_list.FindBreakpointByID(break_id);
  else
    bp_sp = m_breakpoint_list.FindBreakpointByID(break_id);

  return bp_sp;
}

BreakpointSP Target::CreateSourceRegexBreakpoint(
    const FileSpecList *containingModules,
    const FileSpecList *source_file_spec_list,
    const std::unordered_set<std::string> &function_names,
    RegularExpression &source_regex, bool internal, bool hardware,
    LazyBool move_to_nearest_code) {
  SearchFilterSP filter_sp(GetSearchFilterForModuleAndCUList(
      containingModules, source_file_spec_list));
  if (move_to_nearest_code == eLazyBoolCalculate)
    move_to_nearest_code = GetMoveToNearestCode() ? eLazyBoolYes : eLazyBoolNo;
  BreakpointResolverSP resolver_sp(new BreakpointResolverFileRegex(
      nullptr, source_regex, function_names,
      !static_cast<bool>(move_to_nearest_code)));

  return CreateBreakpoint(filter_sp, resolver_sp, internal, hardware, true);
}

BreakpointSP Target::CreateBreakpoint(const FileSpecList *containingModules,
                                      const FileSpec &file, uint32_t line_no,
                                      uint32_t column, lldb::addr_t offset,
                                      LazyBool check_inlines,
                                      LazyBool skip_prologue, bool internal,
                                      bool hardware,
                                      LazyBool move_to_nearest_code) {
  FileSpec remapped_file;
  if (!GetSourcePathMap().ReverseRemapPath(file, remapped_file))
    remapped_file = file;

  if (check_inlines == eLazyBoolCalculate) {
    const InlineStrategy inline_strategy = GetInlineStrategy();
    switch (inline_strategy) {
    case eInlineBreakpointsNever:
      check_inlines = eLazyBoolNo;
      break;

    case eInlineBreakpointsHeaders:
      if (remapped_file.IsSourceImplementationFile())
        check_inlines = eLazyBoolNo;
      else
        check_inlines = eLazyBoolYes;
      break;

    case eInlineBreakpointsAlways:
      check_inlines = eLazyBoolYes;
      break;
    }
  }
  SearchFilterSP filter_sp;
  if (check_inlines == eLazyBoolNo) {
    // Not checking for inlines, we are looking only for matching compile units
    FileSpecList compile_unit_list;
    compile_unit_list.Append(remapped_file);
    filter_sp = GetSearchFilterForModuleAndCUList(containingModules,
                                                  &compile_unit_list);
  } else {
    filter_sp = GetSearchFilterForModuleList(containingModules);
  }
  if (skip_prologue == eLazyBoolCalculate)
    skip_prologue = GetSkipPrologue() ? eLazyBoolYes : eLazyBoolNo;
  if (move_to_nearest_code == eLazyBoolCalculate)
    move_to_nearest_code = GetMoveToNearestCode() ? eLazyBoolYes : eLazyBoolNo;

  BreakpointResolverSP resolver_sp(new BreakpointResolverFileLine(
      nullptr, remapped_file, line_no, column, offset, check_inlines,
      skip_prologue, !static_cast<bool>(move_to_nearest_code)));
  return CreateBreakpoint(filter_sp, resolver_sp, internal, hardware, true);
}

BreakpointSP Target::CreateBreakpoint(lldb::addr_t addr, bool internal,
                                      bool hardware) {
  Address so_addr;

  // Check for any reason we want to move this breakpoint to other address.
  addr = GetBreakableLoadAddress(addr);

  // Attempt to resolve our load address if possible, though it is ok if it
  // doesn't resolve to section/offset.

  // Try and resolve as a load address if possible
  GetSectionLoadList().ResolveLoadAddress(addr, so_addr);
  if (!so_addr.IsValid()) {
    // The address didn't resolve, so just set this as an absolute address
    so_addr.SetOffset(addr);
  }
  BreakpointSP bp_sp(CreateBreakpoint(so_addr, internal, hardware));
  return bp_sp;
}

BreakpointSP Target::CreateBreakpoint(const Address &addr, bool internal,
                                      bool hardware) {
  SearchFilterSP filter_sp(
      new SearchFilterForUnconstrainedSearches(shared_from_this()));
  BreakpointResolverSP resolver_sp(
      new BreakpointResolverAddress(nullptr, addr));
  return CreateBreakpoint(filter_sp, resolver_sp, internal, hardware, false);
}

lldb::BreakpointSP
Target::CreateAddressInModuleBreakpoint(lldb::addr_t file_addr, bool internal,
                                        const FileSpec *file_spec,
                                        bool request_hardware) {
  SearchFilterSP filter_sp(
      new SearchFilterForUnconstrainedSearches(shared_from_this()));
  BreakpointResolverSP resolver_sp(
      new BreakpointResolverAddress(nullptr, file_addr, file_spec));
  return CreateBreakpoint(filter_sp, resolver_sp, internal, request_hardware,
                          false);
}

BreakpointSP Target::CreateBreakpoint(
    const FileSpecList *containingModules,
    const FileSpecList *containingSourceFiles, const char *func_name,
    FunctionNameType func_name_type_mask, LanguageType language,
    lldb::addr_t offset, LazyBool skip_prologue, bool internal, bool hardware) {
  BreakpointSP bp_sp;
  if (func_name) {
    SearchFilterSP filter_sp(GetSearchFilterForModuleAndCUList(
        containingModules, containingSourceFiles));

    if (skip_prologue == eLazyBoolCalculate)
      skip_prologue = GetSkipPrologue() ? eLazyBoolYes : eLazyBoolNo;
    if (language == lldb::eLanguageTypeUnknown)
      language = GetLanguage();

    BreakpointResolverSP resolver_sp(new BreakpointResolverName(
        nullptr, func_name, func_name_type_mask, language, Breakpoint::Exact,
        offset, skip_prologue));
    bp_sp = CreateBreakpoint(filter_sp, resolver_sp, internal, hardware, true);
  }
  return bp_sp;
}

lldb::BreakpointSP
Target::CreateBreakpoint(const FileSpecList *containingModules,
                         const FileSpecList *containingSourceFiles,
                         const std::vector<std::string> &func_names,
                         FunctionNameType func_name_type_mask,
                         LanguageType language, lldb::addr_t offset,
                         LazyBool skip_prologue, bool internal, bool hardware) {
  BreakpointSP bp_sp;
  size_t num_names = func_names.size();
  if (num_names > 0) {
    SearchFilterSP filter_sp(GetSearchFilterForModuleAndCUList(
        containingModules, containingSourceFiles));

    if (skip_prologue == eLazyBoolCalculate)
      skip_prologue = GetSkipPrologue() ? eLazyBoolYes : eLazyBoolNo;
    if (language == lldb::eLanguageTypeUnknown)
      language = GetLanguage();

    BreakpointResolverSP resolver_sp(
        new BreakpointResolverName(nullptr, func_names, func_name_type_mask,
                                   language, offset, skip_prologue));
    bp_sp = CreateBreakpoint(filter_sp, resolver_sp, internal, hardware, true);
  }
  return bp_sp;
}

BreakpointSP
Target::CreateBreakpoint(const FileSpecList *containingModules,
                         const FileSpecList *containingSourceFiles,
                         const char *func_names[], size_t num_names,
                         FunctionNameType func_name_type_mask,
                         LanguageType language, lldb::addr_t offset,
                         LazyBool skip_prologue, bool internal, bool hardware) {
  BreakpointSP bp_sp;
  if (num_names > 0) {
    SearchFilterSP filter_sp(GetSearchFilterForModuleAndCUList(
        containingModules, containingSourceFiles));

    if (skip_prologue == eLazyBoolCalculate) {
      if (offset == 0)
        skip_prologue = GetSkipPrologue() ? eLazyBoolYes : eLazyBoolNo;
      else
        skip_prologue = eLazyBoolNo;
    }
    if (language == lldb::eLanguageTypeUnknown)
      language = GetLanguage();

    BreakpointResolverSP resolver_sp(new BreakpointResolverName(
        nullptr, func_names, num_names, func_name_type_mask, language, offset,
        skip_prologue));
    resolver_sp->SetOffset(offset);
    bp_sp = CreateBreakpoint(filter_sp, resolver_sp, internal, hardware, true);
  }
  return bp_sp;
}

SearchFilterSP
Target::GetSearchFilterForModule(const FileSpec *containingModule) {
  SearchFilterSP filter_sp;
  if (containingModule != nullptr) {
    // TODO: We should look into sharing module based search filters
    // across many breakpoints like we do for the simple target based one
    filter_sp = std::make_shared<SearchFilterByModule>(shared_from_this(),
                                                       *containingModule);
  } else {
    if (!m_search_filter_sp)
      m_search_filter_sp =
          std::make_shared<SearchFilterForUnconstrainedSearches>(
              shared_from_this());
    filter_sp = m_search_filter_sp;
  }
  return filter_sp;
}

SearchFilterSP
Target::GetSearchFilterForModuleList(const FileSpecList *containingModules) {
  SearchFilterSP filter_sp;
  if (containingModules && containingModules->GetSize() != 0) {
    // TODO: We should look into sharing module based search filters
    // across many breakpoints like we do for the simple target based one
    filter_sp = std::make_shared<SearchFilterByModuleList>(shared_from_this(),
                                                           *containingModules);
  } else {
    if (!m_search_filter_sp)
      m_search_filter_sp =
          std::make_shared<SearchFilterForUnconstrainedSearches>(
              shared_from_this());
    filter_sp = m_search_filter_sp;
  }
  return filter_sp;
}

SearchFilterSP Target::GetSearchFilterForModuleAndCUList(
    const FileSpecList *containingModules,
    const FileSpecList *containingSourceFiles) {
  if (containingSourceFiles == nullptr || containingSourceFiles->GetSize() == 0)
    return GetSearchFilterForModuleList(containingModules);

  SearchFilterSP filter_sp;
  if (containingModules == nullptr) {
    // We could make a special "CU List only SearchFilter".  Better yet was if
    // these could be composable, but that will take a little reworking.

    filter_sp = std::make_shared<SearchFilterByModuleListAndCU>(
        shared_from_this(), FileSpecList(), *containingSourceFiles);
  } else {
    filter_sp = std::make_shared<SearchFilterByModuleListAndCU>(
        shared_from_this(), *containingModules, *containingSourceFiles);
  }
  return filter_sp;
}

BreakpointSP Target::CreateFuncRegexBreakpoint(
    const FileSpecList *containingModules,
    const FileSpecList *containingSourceFiles, RegularExpression &func_regex,
    lldb::LanguageType requested_language, LazyBool skip_prologue,
    bool internal, bool hardware) {
  SearchFilterSP filter_sp(GetSearchFilterForModuleAndCUList(
      containingModules, containingSourceFiles));
  bool skip = (skip_prologue == eLazyBoolCalculate)
                  ? GetSkipPrologue()
                  : static_cast<bool>(skip_prologue);
  BreakpointResolverSP resolver_sp(new BreakpointResolverName(
      nullptr, func_regex, requested_language, 0, skip));

  return CreateBreakpoint(filter_sp, resolver_sp, internal, hardware, true);
}

lldb::BreakpointSP
Target::CreateExceptionBreakpoint(enum lldb::LanguageType language,
                                  bool catch_bp, bool throw_bp, bool internal,
                                  Args *additional_args, Status *error) {
  BreakpointSP exc_bkpt_sp = LanguageRuntime::CreateExceptionBreakpoint(
      *this, language, catch_bp, throw_bp, internal);
  if (exc_bkpt_sp && additional_args) {
    Breakpoint::BreakpointPreconditionSP precondition_sp =
        exc_bkpt_sp->GetPrecondition();
    if (precondition_sp && additional_args) {
      if (error)
        *error = precondition_sp->ConfigurePrecondition(*additional_args);
      else
        precondition_sp->ConfigurePrecondition(*additional_args);
    }
  }
  return exc_bkpt_sp;
}

lldb::BreakpointSP
Target::CreateScriptedBreakpoint(const llvm::StringRef class_name,
                                 const FileSpecList *containingModules,
                                 const FileSpecList *containingSourceFiles,
                                 bool internal,
                                 bool request_hardware,
                                 StructuredData::ObjectSP extra_args_sp,
                                 Status *creation_error)
{
  SearchFilterSP filter_sp;
  
  lldb::SearchDepth depth = lldb::eSearchDepthTarget;
  bool has_files = containingSourceFiles && containingSourceFiles->GetSize() > 0;
  bool has_modules = containingModules && containingModules->GetSize() > 0;
  
  if (has_files && has_modules) {
    filter_sp = GetSearchFilterForModuleAndCUList(
      containingModules, containingSourceFiles);
  } else if (has_files) {
    filter_sp = GetSearchFilterForModuleAndCUList(
      nullptr, containingSourceFiles);
  } else if (has_modules) {
    filter_sp = GetSearchFilterForModuleList(containingModules);
  } else {
    filter_sp = std::make_shared<SearchFilterForUnconstrainedSearches>(
        shared_from_this());
  }
  
  StructuredDataImpl *extra_args_impl = new StructuredDataImpl();
  if (extra_args_sp)
    extra_args_impl->SetObjectSP(extra_args_sp);
  
  BreakpointResolverSP resolver_sp(new 
                                   BreakpointResolverScripted(nullptr, class_name,
                                   depth,
                                   extra_args_impl,
                                   *GetDebugger().GetCommandInterpreter()
                                       .GetScriptInterpreter()));
  return CreateBreakpoint(filter_sp, resolver_sp, internal, false, true);

}


BreakpointSP Target::CreateBreakpoint(SearchFilterSP &filter_sp,
                                      BreakpointResolverSP &resolver_sp,
                                      bool internal, bool request_hardware,
                                      bool resolve_indirect_symbols) {
  BreakpointSP bp_sp;
  if (filter_sp && resolver_sp) {
    const bool hardware = request_hardware || GetRequireHardwareBreakpoints();
    bp_sp.reset(new Breakpoint(*this, filter_sp, resolver_sp, hardware,
                               resolve_indirect_symbols));
    resolver_sp->SetBreakpoint(bp_sp.get());
    AddBreakpoint(bp_sp, internal);
  }
  return bp_sp;
}

void Target::AddBreakpoint(lldb::BreakpointSP bp_sp, bool internal) {
  if (!bp_sp)
    return;
  if (internal)
    m_internal_breakpoint_list.Add(bp_sp, false);
  else
    m_breakpoint_list.Add(bp_sp, true);

  Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_BREAKPOINTS));
  if (log) {
    StreamString s;
    bp_sp->GetDescription(&s, lldb::eDescriptionLevelVerbose);
    log->Printf("Target::%s (internal = %s) => break_id = %s\n", __FUNCTION__,
                bp_sp->IsInternal() ? "yes" : "no", s.GetData());
  }

  bp_sp->ResolveBreakpoint();

  if (!internal) {
    m_last_created_breakpoint = bp_sp;
  }
}

void Target::AddNameToBreakpoint(BreakpointID &id,
                                 const char *name,
                                 Status &error)
 {
   BreakpointSP bp_sp 
       = m_breakpoint_list.FindBreakpointByID(id.GetBreakpointID());
   if (!bp_sp)
   {
     StreamString s;
     id.GetDescription(&s, eDescriptionLevelBrief);
     error.SetErrorStringWithFormat("Could not find breakpoint %s", 
                                    s.GetData());
     return;
   }
   AddNameToBreakpoint(bp_sp, name, error);
 }

void Target::AddNameToBreakpoint(BreakpointSP &bp_sp,
                                 const char *name, 
                                 Status &error)
 {
   if (!bp_sp)
     return;
     
   BreakpointName *bp_name = FindBreakpointName(ConstString(name), true, error);
   if (!bp_name)
     return;

   bp_name->ConfigureBreakpoint(bp_sp);
   bp_sp->AddName(name);
 }

void Target::AddBreakpointName(BreakpointName *bp_name) {
  m_breakpoint_names.insert(std::make_pair(bp_name->GetName(), bp_name));
}

BreakpointName *Target::FindBreakpointName(const ConstString &name, 
                                           bool can_create, 
                                           Status &error)
{
  BreakpointID::StringIsBreakpointName(name.GetStringRef(), error);
  if (!error.Success())
    return nullptr;

  BreakpointNameList::iterator iter = m_breakpoint_names.find(name);
  if (iter == m_breakpoint_names.end()) {
    if (!can_create)
    {
      error.SetErrorStringWithFormat("Breakpoint name \"%s\" doesn't exist and "
                                     "can_create is false.", name.AsCString());
      return nullptr;
    }

    iter = m_breakpoint_names.insert(std::make_pair(name,
                                                    new BreakpointName(name)))
                                                        .first;
  }
  return (iter->second);
}

void
Target::DeleteBreakpointName(const ConstString &name)
{
  BreakpointNameList::iterator iter = m_breakpoint_names.find(name);
  
  if (iter != m_breakpoint_names.end()) {
    const char *name_cstr = name.AsCString();
    m_breakpoint_names.erase(iter);
    for (auto bp_sp : m_breakpoint_list.Breakpoints())
      bp_sp->RemoveName(name_cstr);
  }
}

void Target::RemoveNameFromBreakpoint(lldb::BreakpointSP &bp_sp,
                                const ConstString &name)
{
  bp_sp->RemoveName(name.AsCString());
}

void Target::ConfigureBreakpointName(BreakpointName &bp_name,
                               const BreakpointOptions &new_options,
                               const BreakpointName::Permissions &new_permissions)
{
  bp_name.GetOptions().CopyOverSetOptions(new_options);
  bp_name.GetPermissions().MergeInto(new_permissions);
  ApplyNameToBreakpoints(bp_name);
}

void Target::ApplyNameToBreakpoints(BreakpointName &bp_name) {
  BreakpointList bkpts_with_name(false);
  m_breakpoint_list.FindBreakpointsByName(bp_name.GetName().AsCString(), 
                                          bkpts_with_name);

  for (auto bp_sp : bkpts_with_name.Breakpoints())
    bp_name.ConfigureBreakpoint(bp_sp);
}

void Target::GetBreakpointNames(std::vector<std::string> &names)
{
  names.clear();
  for (auto bp_name : m_breakpoint_names) {
    names.push_back(bp_name.first.AsCString());
  }
  llvm::sort(names.begin(), names.end());
}

bool Target::ProcessIsValid() {
  return (m_process_sp && m_process_sp->IsAlive());
}

static bool CheckIfWatchpointsSupported(Target *target, Status &error) {
  uint32_t num_supported_hardware_watchpoints;
  Status rc = target->GetProcessSP()->GetWatchpointSupportInfo(
      num_supported_hardware_watchpoints);

  // If unable to determine the # of watchpoints available,
  // assume they are supported.
  if (rc.Fail())
    return true;

  if (num_supported_hardware_watchpoints == 0) {
    error.SetErrorStringWithFormat(
        "Target supports (%u) hardware watchpoint slots.\n",
        num_supported_hardware_watchpoints);
    return false;
  }
  return true;
}

// See also Watchpoint::SetWatchpointType(uint32_t type) and the
// OptionGroupWatchpoint::WatchType enum type.
WatchpointSP Target::CreateWatchpoint(lldb::addr_t addr, size_t size,
                                      const CompilerType *type, uint32_t kind,
                                      Status &error) {
  Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_WATCHPOINTS));
  if (log)
    log->Printf("Target::%s (addr = 0x%8.8" PRIx64 " size = %" PRIu64
                " type = %u)\n",
                __FUNCTION__, addr, (uint64_t)size, kind);

  WatchpointSP wp_sp;
  if (!ProcessIsValid()) {
    error.SetErrorString("process is not alive");
    return wp_sp;
  }

  if (addr == LLDB_INVALID_ADDRESS || size == 0) {
    if (size == 0)
      error.SetErrorString("cannot set a watchpoint with watch_size of 0");
    else
      error.SetErrorStringWithFormat("invalid watch address: %" PRIu64, addr);
    return wp_sp;
  }

  if (!LLDB_WATCH_TYPE_IS_VALID(kind)) {
    error.SetErrorStringWithFormat("invalid watchpoint type: %d", kind);
  }

  if (!CheckIfWatchpointsSupported(this, error))
    return wp_sp;

  // Currently we only support one watchpoint per address, with total number of
  // watchpoints limited by the hardware which the inferior is running on.

  // Grab the list mutex while doing operations.
  const bool notify = false; // Don't notify about all the state changes we do
                             // on creating the watchpoint.
  std::unique_lock<std::recursive_mutex> lock;
  this->GetWatchpointList().GetListMutex(lock);
  WatchpointSP matched_sp = m_watchpoint_list.FindByAddress(addr);
  if (matched_sp) {
    size_t old_size = matched_sp->GetByteSize();
    uint32_t old_type =
        (matched_sp->WatchpointRead() ? LLDB_WATCH_TYPE_READ : 0) |
        (matched_sp->WatchpointWrite() ? LLDB_WATCH_TYPE_WRITE : 0);
    // Return the existing watchpoint if both size and type match.
    if (size == old_size && kind == old_type) {
      wp_sp = matched_sp;
      wp_sp->SetEnabled(false, notify);
    } else {
      // Nil the matched watchpoint; we will be creating a new one.
      m_process_sp->DisableWatchpoint(matched_sp.get(), notify);
      m_watchpoint_list.Remove(matched_sp->GetID(), true);
    }
  }

  if (!wp_sp) {
    wp_sp = std::make_shared<Watchpoint>(*this, addr, size, type);
    wp_sp->SetWatchpointType(kind, notify);
    m_watchpoint_list.Add(wp_sp, true);
  }

  error = m_process_sp->EnableWatchpoint(wp_sp.get(), notify);
  if (log)
    log->Printf("Target::%s (creation of watchpoint %s with id = %u)\n",
                __FUNCTION__, error.Success() ? "succeeded" : "failed",
                wp_sp->GetID());

  if (error.Fail()) {
    // Enabling the watchpoint on the device side failed. Remove the said
    // watchpoint from the list maintained by the target instance.
    m_watchpoint_list.Remove(wp_sp->GetID(), true);
    // See if we could provide more helpful error message.
    if (!OptionGroupWatchpoint::IsWatchSizeSupported(size))
      error.SetErrorStringWithFormat(
          "watch size of %" PRIu64 " is not supported", (uint64_t)size);

    wp_sp.reset();
  } else
    m_last_created_watchpoint = wp_sp;
  return wp_sp;
}

void Target::RemoveAllowedBreakpoints ()
{
  Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_BREAKPOINTS));
  if (log)
    log->Printf("Target::%s \n", __FUNCTION__);

  m_breakpoint_list.RemoveAllowed(true);
  
  m_last_created_breakpoint.reset();
}

void Target::RemoveAllBreakpoints(bool internal_also) {
  Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_BREAKPOINTS));
  if (log)
    log->Printf("Target::%s (internal_also = %s)\n", __FUNCTION__,
                internal_also ? "yes" : "no");

  m_breakpoint_list.RemoveAll(true);
  if (internal_also)
    m_internal_breakpoint_list.RemoveAll(false);

  m_last_created_breakpoint.reset();
}

void Target::DisableAllBreakpoints(bool internal_also) {
  Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_BREAKPOINTS));
  if (log)
    log->Printf("Target::%s (internal_also = %s)\n", __FUNCTION__,
                internal_also ? "yes" : "no");

  m_breakpoint_list.SetEnabledAll(false);
  if (internal_also)
    m_internal_breakpoint_list.SetEnabledAll(false);
}

void Target::DisableAllowedBreakpoints() {
  Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_BREAKPOINTS));
  if (log)
    log->Printf("Target::%s", __FUNCTION__);

  m_breakpoint_list.SetEnabledAllowed(false);
}

void Target::EnableAllBreakpoints(bool internal_also) {
  Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_BREAKPOINTS));
  if (log)
    log->Printf("Target::%s (internal_also = %s)\n", __FUNCTION__,
                internal_also ? "yes" : "no");

  m_breakpoint_list.SetEnabledAll(true);
  if (internal_also)
    m_internal_breakpoint_list.SetEnabledAll(true);
}

void Target::EnableAllowedBreakpoints() {
  Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_BREAKPOINTS));
  if (log)
    log->Printf("Target::%s", __FUNCTION__);

  m_breakpoint_list.SetEnabledAllowed(true);
}

bool Target::RemoveBreakpointByID(break_id_t break_id) {
  Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_BREAKPOINTS));
  if (log)
    log->Printf("Target::%s (break_id = %i, internal = %s)\n", __FUNCTION__,
                break_id, LLDB_BREAK_ID_IS_INTERNAL(break_id) ? "yes" : "no");

  if (DisableBreakpointByID(break_id)) {
    if (LLDB_BREAK_ID_IS_INTERNAL(break_id))
      m_internal_breakpoint_list.Remove(break_id, false);
    else {
      if (m_last_created_breakpoint) {
        if (m_last_created_breakpoint->GetID() == break_id)
          m_last_created_breakpoint.reset();
      }
      m_breakpoint_list.Remove(break_id, true);
    }
    return true;
  }
  return false;
}

bool Target::DisableBreakpointByID(break_id_t break_id) {
  Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_BREAKPOINTS));
  if (log)
    log->Printf("Target::%s (break_id = %i, internal = %s)\n", __FUNCTION__,
                break_id, LLDB_BREAK_ID_IS_INTERNAL(break_id) ? "yes" : "no");

  BreakpointSP bp_sp;

  if (LLDB_BREAK_ID_IS_INTERNAL(break_id))
    bp_sp = m_internal_breakpoint_list.FindBreakpointByID(break_id);
  else
    bp_sp = m_breakpoint_list.FindBreakpointByID(break_id);
  if (bp_sp) {
    bp_sp->SetEnabled(false);
    return true;
  }
  return false;
}

bool Target::EnableBreakpointByID(break_id_t break_id) {
  Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_BREAKPOINTS));
  if (log)
    log->Printf("Target::%s (break_id = %i, internal = %s)\n", __FUNCTION__,
                break_id, LLDB_BREAK_ID_IS_INTERNAL(break_id) ? "yes" : "no");

  BreakpointSP bp_sp;

  if (LLDB_BREAK_ID_IS_INTERNAL(break_id))
    bp_sp = m_internal_breakpoint_list.FindBreakpointByID(break_id);
  else
    bp_sp = m_breakpoint_list.FindBreakpointByID(break_id);

  if (bp_sp) {
    bp_sp->SetEnabled(true);
    return true;
  }
  return false;
}

Status Target::SerializeBreakpointsToFile(const FileSpec &file,
                                          const BreakpointIDList &bp_ids,
                                          bool append) {
  Status error;

  if (!file) {
    error.SetErrorString("Invalid FileSpec.");
    return error;
  }

  std::string path(file.GetPath());
  StructuredData::ObjectSP input_data_sp;

  StructuredData::ArraySP break_store_sp;
  StructuredData::Array *break_store_ptr = nullptr;

  if (append) {
    input_data_sp = StructuredData::ParseJSONFromFile(file, error);
    if (error.Success()) {
      break_store_ptr = input_data_sp->GetAsArray();
      if (!break_store_ptr) {
        error.SetErrorStringWithFormat(
            "Tried to append to invalid input file %s", path.c_str());
        return error;
      }
    }
  }

  if (!break_store_ptr) {
    break_store_sp = std::make_shared<StructuredData::Array>();
    break_store_ptr = break_store_sp.get();
  }

  StreamFile out_file(path.c_str(),
                      File::OpenOptions::eOpenOptionTruncate |
                          File::OpenOptions::eOpenOptionWrite |
                          File::OpenOptions::eOpenOptionCanCreate |
                          File::OpenOptions::eOpenOptionCloseOnExec,
                      lldb::eFilePermissionsFileDefault);
  if (!out_file.GetFile().IsValid()) {
    error.SetErrorStringWithFormat("Unable to open output file: %s.",
                                   path.c_str());
    return error;
  }

  std::unique_lock<std::recursive_mutex> lock;
  GetBreakpointList().GetListMutex(lock);

  if (bp_ids.GetSize() == 0) {
    const BreakpointList &breakpoints = GetBreakpointList();

    size_t num_breakpoints = breakpoints.GetSize();
    for (size_t i = 0; i < num_breakpoints; i++) {
      Breakpoint *bp = breakpoints.GetBreakpointAtIndex(i).get();
      StructuredData::ObjectSP bkpt_save_sp = bp->SerializeToStructuredData();
      // If a breakpoint can't serialize it, just ignore it for now:
      if (bkpt_save_sp)
        break_store_ptr->AddItem(bkpt_save_sp);
    }
  } else {

    std::unordered_set<lldb::break_id_t> processed_bkpts;
    const size_t count = bp_ids.GetSize();
    for (size_t i = 0; i < count; ++i) {
      BreakpointID cur_bp_id = bp_ids.GetBreakpointIDAtIndex(i);
      lldb::break_id_t bp_id = cur_bp_id.GetBreakpointID();

      if (bp_id != LLDB_INVALID_BREAK_ID) {
        // Only do each breakpoint once:
        std::pair<std::unordered_set<lldb::break_id_t>::iterator, bool>
            insert_result = processed_bkpts.insert(bp_id);
        if (!insert_result.second)
          continue;

        Breakpoint *bp = GetBreakpointByID(bp_id).get();
        StructuredData::ObjectSP bkpt_save_sp = bp->SerializeToStructuredData();
        // If the user explicitly asked to serialize a breakpoint, and we
        // can't, then raise an error:
        if (!bkpt_save_sp) {
          error.SetErrorStringWithFormat("Unable to serialize breakpoint %d",
                                         bp_id);
          return error;
        }
        break_store_ptr->AddItem(bkpt_save_sp);
      }
    }
  }

  break_store_ptr->Dump(out_file, false);
  out_file.PutChar('\n');
  return error;
}

Status Target::CreateBreakpointsFromFile(const FileSpec &file,
                                         BreakpointIDList &new_bps) {
  std::vector<std::string> no_names;
  return CreateBreakpointsFromFile(file, no_names, new_bps);
}

Status Target::CreateBreakpointsFromFile(const FileSpec &file,
                                         std::vector<std::string> &names,
                                         BreakpointIDList &new_bps) {
  std::unique_lock<std::recursive_mutex> lock;
  GetBreakpointList().GetListMutex(lock);

  Status error;
  StructuredData::ObjectSP input_data_sp =
      StructuredData::ParseJSONFromFile(file, error);
  if (!error.Success()) {
    return error;
  } else if (!input_data_sp || !input_data_sp->IsValid()) {
    error.SetErrorStringWithFormat("Invalid JSON from input file: %s.",
                                   file.GetPath().c_str());
    return error;
  }

  StructuredData::Array *bkpt_array = input_data_sp->GetAsArray();
  if (!bkpt_array) {
    error.SetErrorStringWithFormat(
        "Invalid breakpoint data from input file: %s.", file.GetPath().c_str());
    return error;
  }

  size_t num_bkpts = bkpt_array->GetSize();
  size_t num_names = names.size();

  for (size_t i = 0; i < num_bkpts; i++) {
    StructuredData::ObjectSP bkpt_object_sp = bkpt_array->GetItemAtIndex(i);
    // Peel off the breakpoint key, and feed the rest to the Breakpoint:
    StructuredData::Dictionary *bkpt_dict = bkpt_object_sp->GetAsDictionary();
    if (!bkpt_dict) {
      error.SetErrorStringWithFormat(
          "Invalid breakpoint data for element %zu from input file: %s.", i,
          file.GetPath().c_str());
      return error;
    }
    StructuredData::ObjectSP bkpt_data_sp =
        bkpt_dict->GetValueForKey(Breakpoint::GetSerializationKey());
    if (num_names &&
        !Breakpoint::SerializedBreakpointMatchesNames(bkpt_data_sp, names))
      continue;

    BreakpointSP bkpt_sp =
        Breakpoint::CreateFromStructuredData(*this, bkpt_data_sp, error);
    if (!error.Success()) {
      error.SetErrorStringWithFormat(
          "Error restoring breakpoint %zu from %s: %s.", i,
          file.GetPath().c_str(), error.AsCString());
      return error;
    }
    new_bps.AddBreakpointID(BreakpointID(bkpt_sp->GetID()));
  }
  return error;
}

// The flag 'end_to_end', default to true, signifies that the operation is
// performed end to end, for both the debugger and the debuggee.

// Assumption: Caller holds the list mutex lock for m_watchpoint_list for end
// to end operations.
bool Target::RemoveAllWatchpoints(bool end_to_end) {
  Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_WATCHPOINTS));
  if (log)
    log->Printf("Target::%s\n", __FUNCTION__);

  if (!end_to_end) {
    m_watchpoint_list.RemoveAll(true);
    return true;
  }

  // Otherwise, it's an end to end operation.

  if (!ProcessIsValid())
    return false;

  size_t num_watchpoints = m_watchpoint_list.GetSize();
  for (size_t i = 0; i < num_watchpoints; ++i) {
    WatchpointSP wp_sp = m_watchpoint_list.GetByIndex(i);
    if (!wp_sp)
      return false;

    Status rc = m_process_sp->DisableWatchpoint(wp_sp.get());
    if (rc.Fail())
      return false;
  }
  m_watchpoint_list.RemoveAll(true);
  m_last_created_watchpoint.reset();
  return true; // Success!
}

// Assumption: Caller holds the list mutex lock for m_watchpoint_list for end
// to end operations.
bool Target::DisableAllWatchpoints(bool end_to_end) {
  Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_WATCHPOINTS));
  if (log)
    log->Printf("Target::%s\n", __FUNCTION__);

  if (!end_to_end) {
    m_watchpoint_list.SetEnabledAll(false);
    return true;
  }

  // Otherwise, it's an end to end operation.

  if (!ProcessIsValid())
    return false;

  size_t num_watchpoints = m_watchpoint_list.GetSize();
  for (size_t i = 0; i < num_watchpoints; ++i) {
    WatchpointSP wp_sp = m_watchpoint_list.GetByIndex(i);
    if (!wp_sp)
      return false;

    Status rc = m_process_sp->DisableWatchpoint(wp_sp.get());
    if (rc.Fail())
      return false;
  }
  return true; // Success!
}

// Assumption: Caller holds the list mutex lock for m_watchpoint_list for end
// to end operations.
bool Target::EnableAllWatchpoints(bool end_to_end) {
  Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_WATCHPOINTS));
  if (log)
    log->Printf("Target::%s\n", __FUNCTION__);

  if (!end_to_end) {
    m_watchpoint_list.SetEnabledAll(true);
    return true;
  }

  // Otherwise, it's an end to end operation.

  if (!ProcessIsValid())
    return false;

  size_t num_watchpoints = m_watchpoint_list.GetSize();
  for (size_t i = 0; i < num_watchpoints; ++i) {
    WatchpointSP wp_sp = m_watchpoint_list.GetByIndex(i);
    if (!wp_sp)
      return false;

    Status rc = m_process_sp->EnableWatchpoint(wp_sp.get());
    if (rc.Fail())
      return false;
  }
  return true; // Success!
}

// Assumption: Caller holds the list mutex lock for m_watchpoint_list.
bool Target::ClearAllWatchpointHitCounts() {
  Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_WATCHPOINTS));
  if (log)
    log->Printf("Target::%s\n", __FUNCTION__);

  size_t num_watchpoints = m_watchpoint_list.GetSize();
  for (size_t i = 0; i < num_watchpoints; ++i) {
    WatchpointSP wp_sp = m_watchpoint_list.GetByIndex(i);
    if (!wp_sp)
      return false;

    wp_sp->ResetHitCount();
  }
  return true; // Success!
}

// Assumption: Caller holds the list mutex lock for m_watchpoint_list.
bool Target::ClearAllWatchpointHistoricValues() {
  Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_WATCHPOINTS));
  if (log)
    log->Printf("Target::%s\n", __FUNCTION__);

  size_t num_watchpoints = m_watchpoint_list.GetSize();
  for (size_t i = 0; i < num_watchpoints; ++i) {
    WatchpointSP wp_sp = m_watchpoint_list.GetByIndex(i);
    if (!wp_sp)
      return false;

    wp_sp->ResetHistoricValues();
  }
  return true; // Success!
}

// Assumption: Caller holds the list mutex lock for m_watchpoint_list during
// these operations.
bool Target::IgnoreAllWatchpoints(uint32_t ignore_count) {
  Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_WATCHPOINTS));
  if (log)
    log->Printf("Target::%s\n", __FUNCTION__);

  if (!ProcessIsValid())
    return false;

  size_t num_watchpoints = m_watchpoint_list.GetSize();
  for (size_t i = 0; i < num_watchpoints; ++i) {
    WatchpointSP wp_sp = m_watchpoint_list.GetByIndex(i);
    if (!wp_sp)
      return false;

    wp_sp->SetIgnoreCount(ignore_count);
  }
  return true; // Success!
}

// Assumption: Caller holds the list mutex lock for m_watchpoint_list.
bool Target::DisableWatchpointByID(lldb::watch_id_t watch_id) {
  Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_WATCHPOINTS));
  if (log)
    log->Printf("Target::%s (watch_id = %i)\n", __FUNCTION__, watch_id);

  if (!ProcessIsValid())
    return false;

  WatchpointSP wp_sp = m_watchpoint_list.FindByID(watch_id);
  if (wp_sp) {
    Status rc = m_process_sp->DisableWatchpoint(wp_sp.get());
    if (rc.Success())
      return true;

    // Else, fallthrough.
  }
  return false;
}

// Assumption: Caller holds the list mutex lock for m_watchpoint_list.
bool Target::EnableWatchpointByID(lldb::watch_id_t watch_id) {
  Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_WATCHPOINTS));
  if (log)
    log->Printf("Target::%s (watch_id = %i)\n", __FUNCTION__, watch_id);

  if (!ProcessIsValid())
    return false;

  WatchpointSP wp_sp = m_watchpoint_list.FindByID(watch_id);
  if (wp_sp) {
    Status rc = m_process_sp->EnableWatchpoint(wp_sp.get());
    if (rc.Success())
      return true;

    // Else, fallthrough.
  }
  return false;
}

// Assumption: Caller holds the list mutex lock for m_watchpoint_list.
bool Target::RemoveWatchpointByID(lldb::watch_id_t watch_id) {
  Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_WATCHPOINTS));
  if (log)
    log->Printf("Target::%s (watch_id = %i)\n", __FUNCTION__, watch_id);

  WatchpointSP watch_to_remove_sp = m_watchpoint_list.FindByID(watch_id);
  if (watch_to_remove_sp == m_last_created_watchpoint)
    m_last_created_watchpoint.reset();

  if (DisableWatchpointByID(watch_id)) {
    m_watchpoint_list.Remove(watch_id, true);
    return true;
  }
  return false;
}

// Assumption: Caller holds the list mutex lock for m_watchpoint_list.
bool Target::IgnoreWatchpointByID(lldb::watch_id_t watch_id,
                                  uint32_t ignore_count) {
  Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_WATCHPOINTS));
  if (log)
    log->Printf("Target::%s (watch_id = %i)\n", __FUNCTION__, watch_id);

  if (!ProcessIsValid())
    return false;

  WatchpointSP wp_sp = m_watchpoint_list.FindByID(watch_id);
  if (wp_sp) {
    wp_sp->SetIgnoreCount(ignore_count);
    return true;
  }
  return false;
}

ModuleSP Target::GetExecutableModule() {
  // search for the first executable in the module list
  for (size_t i = 0; i < m_images.GetSize(); ++i) {
    ModuleSP module_sp = m_images.GetModuleAtIndex(i);
    lldb_private::ObjectFile *obj = module_sp->GetObjectFile();
    if (obj == nullptr)
      continue;
    if (obj->GetType() == ObjectFile::Type::eTypeExecutable)
      return module_sp;
  }
  // as fall back return the first module loaded
  return m_images.GetModuleAtIndex(0);
}

Module *Target::GetExecutableModulePointer() {
  return GetExecutableModule().get();
}

static void LoadScriptingResourceForModule(const ModuleSP &module_sp,
                                           Target *target) {
  Status error;
  StreamString feedback_stream;
  if (module_sp &&
      !module_sp->LoadScriptingResourceInTarget(target, error,
                                                &feedback_stream)) {
    if (error.AsCString())
      target->GetDebugger().GetErrorFile()->Printf(
          "unable to load scripting data for module %s - error reported was "
          "%s\n",
          module_sp->GetFileSpec().GetFileNameStrippingExtension().GetCString(),
          error.AsCString());
  }
  if (feedback_stream.GetSize())
    target->GetDebugger().GetErrorFile()->Printf("%s\n",
                                                 feedback_stream.GetData());
}

void Target::ClearModules(bool delete_locations) {
  ModulesDidUnload(m_images, delete_locations);
  m_section_load_history.Clear();
  m_images.Clear();
  m_scratch_type_system_map.Clear();
  m_ast_importer_sp.reset();
}

void Target::DidExec() {
  // When a process exec's we need to know about it so we can do some cleanup.
  m_breakpoint_list.RemoveInvalidLocations(m_arch.GetSpec());
  m_internal_breakpoint_list.RemoveInvalidLocations(m_arch.GetSpec());
}

void Target::SetExecutableModule(ModuleSP &executable_sp,
                                 LoadDependentFiles load_dependent_files) {
  Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_TARGET));
  ClearModules(false);

  if (executable_sp) {
    static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
    Timer scoped_timer(func_cat,
                       "Target::SetExecutableModule (executable = '%s')",
                       executable_sp->GetFileSpec().GetPath().c_str());

    m_images.Append(executable_sp); // The first image is our executable file

    // If we haven't set an architecture yet, reset our architecture based on
    // what we found in the executable module.
    if (!m_arch.GetSpec().IsValid()) {
      m_arch = executable_sp->GetArchitecture();
      LLDB_LOG(log,
               "setting architecture to {0} ({1}) based on executable file",
               m_arch.GetSpec().GetArchitectureName(),
               m_arch.GetSpec().GetTriple().getTriple());
    }

    FileSpecList dependent_files;
    ObjectFile *executable_objfile = executable_sp->GetObjectFile();
    bool load_dependents = true;
    switch (load_dependent_files) {
    case eLoadDependentsDefault:
      load_dependents = executable_sp->IsExecutable();
      break;
    case eLoadDependentsYes:
      load_dependents = true;
      break;
    case eLoadDependentsNo:
      load_dependents = false;
      break;
    }

    if (executable_objfile && load_dependents) {
      executable_objfile->GetDependentModules(dependent_files);
      for (uint32_t i = 0; i < dependent_files.GetSize(); i++) {
        FileSpec dependent_file_spec(
            dependent_files.GetFileSpecPointerAtIndex(i));
        FileSpec platform_dependent_file_spec;
        if (m_platform_sp)
          m_platform_sp->GetFileWithUUID(dependent_file_spec, nullptr,
                                         platform_dependent_file_spec);
        else
          platform_dependent_file_spec = dependent_file_spec;

        ModuleSpec module_spec(platform_dependent_file_spec, m_arch.GetSpec());
        ModuleSP image_module_sp(GetSharedModule(module_spec));
        if (image_module_sp) {
          ObjectFile *objfile = image_module_sp->GetObjectFile();
          if (objfile)
            objfile->GetDependentModules(dependent_files);
        }
      }
    }
  }
}

bool Target::SetArchitecture(const ArchSpec &arch_spec, bool set_platform) {
  Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_TARGET));
  bool missing_local_arch = !m_arch.GetSpec().IsValid();
  bool replace_local_arch = true;
  bool compatible_local_arch = false;
  ArchSpec other(arch_spec);

  // Changing the architecture might mean that the currently selected platform
  // isn't compatible. Set the platform correctly if we are asked to do so,
  // otherwise assume the user will set the platform manually.
  if (set_platform) {
    if (other.IsValid()) {
      auto platform_sp = GetPlatform();
      if (!platform_sp ||
          !platform_sp->IsCompatibleArchitecture(other, false, nullptr)) {
        ArchSpec platform_arch;
        auto arch_platform_sp =
            Platform::GetPlatformForArchitecture(other, &platform_arch);
        if (arch_platform_sp) {
          SetPlatform(arch_platform_sp);
          if (platform_arch.IsValid())
            other = platform_arch;
        }
      }
    }
  }

  if (!missing_local_arch) {
    if (m_arch.GetSpec().IsCompatibleMatch(arch_spec)) {
      other.MergeFrom(m_arch.GetSpec());

      if (m_arch.GetSpec().IsCompatibleMatch(other)) {
        compatible_local_arch = true;
        bool arch_changed, vendor_changed, os_changed, os_ver_changed,
            env_changed;

        m_arch.GetSpec().PiecewiseTripleCompare(other, arch_changed, vendor_changed,
                                      os_changed, os_ver_changed, env_changed);

        if (!arch_changed && !vendor_changed && !os_changed && !env_changed)
          replace_local_arch = false;
      }
    }
  }

  if (compatible_local_arch || missing_local_arch) {
    // If we haven't got a valid arch spec, or the architectures are compatible
    // update the architecture, unless the one we already have is more
    // specified
    if (replace_local_arch)
      m_arch = other;
    LLDB_LOG(log, "set architecture to {0} ({1})",
             m_arch.GetSpec().GetArchitectureName(),
             m_arch.GetSpec().GetTriple().getTriple());
    return true;
  }

  // If we have an executable file, try to reset the executable to the desired
  // architecture
  if (log)
    log->Printf("Target::SetArchitecture changing architecture to %s (%s)",
                arch_spec.GetArchitectureName(),
                arch_spec.GetTriple().getTriple().c_str());
  m_arch = other;
  ModuleSP executable_sp = GetExecutableModule();

  ClearModules(true);
  // Need to do something about unsetting breakpoints.

  if (executable_sp) {
    if (log)
      log->Printf("Target::SetArchitecture Trying to select executable file "
                  "architecture %s (%s)",
                  arch_spec.GetArchitectureName(),
                  arch_spec.GetTriple().getTriple().c_str());
    ModuleSpec module_spec(executable_sp->GetFileSpec(), other);
    Status error = ModuleList::GetSharedModule(module_spec, executable_sp,
                                               &GetExecutableSearchPaths(),
                                               nullptr, nullptr);

    if (!error.Fail() && executable_sp) {
      SetExecutableModule(executable_sp, eLoadDependentsYes);
      return true;
    }
  }
  return false;
}

bool Target::MergeArchitecture(const ArchSpec &arch_spec) {
  Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_TARGET));
  if (arch_spec.IsValid()) {
    if (m_arch.GetSpec().IsCompatibleMatch(arch_spec)) {
      // The current target arch is compatible with "arch_spec", see if we can
      // improve our current architecture using bits from "arch_spec"

      if (log)
        log->Printf("Target::MergeArchitecture target has arch %s, merging with "
                    "arch %s", 
                    m_arch.GetSpec().GetTriple().getTriple().c_str(),
                    arch_spec.GetTriple().getTriple().c_str());

      // Merge bits from arch_spec into "merged_arch" and set our architecture
      ArchSpec merged_arch(m_arch.GetSpec());
      merged_arch.MergeFrom(arch_spec);
      return SetArchitecture(merged_arch);
    } else {
      // The new architecture is different, we just need to replace it
      return SetArchitecture(arch_spec);
    }
  }
  return false;
}

void Target::WillClearList(const ModuleList &module_list) {}

void Target::ModuleAdded(const ModuleList &module_list,
                         const ModuleSP &module_sp) {
  // A module is being added to this target for the first time
  if (m_valid) {
    ModuleList my_module_list;
    my_module_list.Append(module_sp);
    LoadScriptingResourceForModule(module_sp, this);
    ModulesDidLoad(my_module_list);
  }
}

void Target::ModuleRemoved(const ModuleList &module_list,
                           const ModuleSP &module_sp) {
  // A module is being removed from this target.
  if (m_valid) {
    ModuleList my_module_list;
    my_module_list.Append(module_sp);
    ModulesDidUnload(my_module_list, false);
  }
}

void Target::ModuleUpdated(const ModuleList &module_list,
                           const ModuleSP &old_module_sp,
                           const ModuleSP &new_module_sp) {
  // A module is replacing an already added module
  if (m_valid) {
    m_breakpoint_list.UpdateBreakpointsWhenModuleIsReplaced(old_module_sp,
                                                            new_module_sp);
    m_internal_breakpoint_list.UpdateBreakpointsWhenModuleIsReplaced(
        old_module_sp, new_module_sp);
  }
}

void Target::ModulesDidLoad(ModuleList &module_list) {
  if (m_valid && module_list.GetSize()) {
    m_breakpoint_list.UpdateBreakpoints(module_list, true, false);
    m_internal_breakpoint_list.UpdateBreakpoints(module_list, true, false);
    if (m_process_sp) {
      m_process_sp->ModulesDidLoad(module_list);
    }
    BroadcastEvent(eBroadcastBitModulesLoaded,
                   new TargetEventData(this->shared_from_this(), module_list));
  }
}

void Target::SymbolsDidLoad(ModuleList &module_list) {
  if (m_valid && module_list.GetSize()) {
    if (m_process_sp) {
      LanguageRuntime *runtime =
          m_process_sp->GetLanguageRuntime(lldb::eLanguageTypeObjC);
      if (runtime) {
        ObjCLanguageRuntime *objc_runtime = (ObjCLanguageRuntime *)runtime;
        objc_runtime->SymbolsDidLoad(module_list);
      }
    }

    m_breakpoint_list.UpdateBreakpoints(module_list, true, false);
    m_internal_breakpoint_list.UpdateBreakpoints(module_list, true, false);
    BroadcastEvent(eBroadcastBitSymbolsLoaded,
                   new TargetEventData(this->shared_from_this(), module_list));
  }
}

void Target::ModulesDidUnload(ModuleList &module_list, bool delete_locations) {
  if (m_valid && module_list.GetSize()) {
    UnloadModuleSections(module_list);
    m_breakpoint_list.UpdateBreakpoints(module_list, false, delete_locations);
    m_internal_breakpoint_list.UpdateBreakpoints(module_list, false,
                                                 delete_locations);
    BroadcastEvent(eBroadcastBitModulesUnloaded,
                   new TargetEventData(this->shared_from_this(), module_list));
  }
}

bool Target::ModuleIsExcludedForUnconstrainedSearches(
    const FileSpec &module_file_spec) {
  if (GetBreakpointsConsultPlatformAvoidList()) {
    ModuleList matchingModules;
    ModuleSpec module_spec(module_file_spec);
    size_t num_modules = GetImages().FindModules(module_spec, matchingModules);

    // If there is more than one module for this file spec, only return true if
    // ALL the modules are on the
    // black list.
    if (num_modules > 0) {
      for (size_t i = 0; i < num_modules; i++) {
        if (!ModuleIsExcludedForUnconstrainedSearches(
                matchingModules.GetModuleAtIndex(i)))
          return false;
      }
      return true;
    }
  }
  return false;
}

bool Target::ModuleIsExcludedForUnconstrainedSearches(
    const lldb::ModuleSP &module_sp) {
  if (GetBreakpointsConsultPlatformAvoidList()) {
    if (m_platform_sp)
      return m_platform_sp->ModuleIsExcludedForUnconstrainedSearches(*this,
                                                                     module_sp);
  }
  return false;
}

size_t Target::ReadMemoryFromFileCache(const Address &addr, void *dst,
                                       size_t dst_len, Status &error) {
  SectionSP section_sp(addr.GetSection());
  if (section_sp) {
    // If the contents of this section are encrypted, the on-disk file is
    // unusable.  Read only from live memory.
    if (section_sp->IsEncrypted()) {
      error.SetErrorString("section is encrypted");
      return 0;
    }
    ModuleSP module_sp(section_sp->GetModule());
    if (module_sp) {
      ObjectFile *objfile = section_sp->GetModule()->GetObjectFile();
      if (objfile) {
        size_t bytes_read = objfile->ReadSectionData(
            section_sp.get(), addr.GetOffset(), dst, dst_len);
        if (bytes_read > 0)
          return bytes_read;
        else
          error.SetErrorStringWithFormat("error reading data from section %s",
                                         section_sp->GetName().GetCString());
      } else
        error.SetErrorString("address isn't from a object file");
    } else
      error.SetErrorString("address isn't in a module");
  } else
    error.SetErrorString("address doesn't contain a section that points to a "
                         "section in a object file");

  return 0;
}

size_t Target::ReadMemory(const Address &addr, bool prefer_file_cache,
                          void *dst, size_t dst_len, Status &error,
                          lldb::addr_t *load_addr_ptr) {
  error.Clear();

  // if we end up reading this from process memory, we will fill this with the
  // actual load address
  if (load_addr_ptr)
    *load_addr_ptr = LLDB_INVALID_ADDRESS;

  size_t bytes_read = 0;

  addr_t load_addr = LLDB_INVALID_ADDRESS;
  addr_t file_addr = LLDB_INVALID_ADDRESS;
  Address resolved_addr;
  if (!addr.IsSectionOffset()) {
    SectionLoadList &section_load_list = GetSectionLoadList();
    if (section_load_list.IsEmpty()) {
      // No sections are loaded, so we must assume we are not running yet and
      // anything we are given is a file address.
      file_addr = addr.GetOffset(); // "addr" doesn't have a section, so its
                                    // offset is the file address
      m_images.ResolveFileAddress(file_addr, resolved_addr);
    } else {
      // We have at least one section loaded. This can be because we have
      // manually loaded some sections with "target modules load ..." or
      // because we have have a live process that has sections loaded through
      // the dynamic loader
      load_addr = addr.GetOffset(); // "addr" doesn't have a section, so its
                                    // offset is the load address
      section_load_list.ResolveLoadAddress(load_addr, resolved_addr);
    }
  }
  if (!resolved_addr.IsValid())
    resolved_addr = addr;

  if (prefer_file_cache) {
    bytes_read = ReadMemoryFromFileCache(resolved_addr, dst, dst_len, error);
    if (bytes_read > 0)
      return bytes_read;
  }

  if (ProcessIsValid()) {
    if (load_addr == LLDB_INVALID_ADDRESS)
      load_addr = resolved_addr.GetLoadAddress(this);

    if (load_addr == LLDB_INVALID_ADDRESS) {
      ModuleSP addr_module_sp(resolved_addr.GetModule());
      if (addr_module_sp && addr_module_sp->GetFileSpec())
        error.SetErrorStringWithFormatv(
            "{0:F}[{1:x+}] can't be resolved, {0:F} is not currently loaded",
            addr_module_sp->GetFileSpec(), resolved_addr.GetFileAddress());
      else
        error.SetErrorStringWithFormat("0x%" PRIx64 " can't be resolved",
                                       resolved_addr.GetFileAddress());
    } else {
      bytes_read = m_process_sp->ReadMemory(load_addr, dst, dst_len, error);
      if (bytes_read != dst_len) {
        if (error.Success()) {
          if (bytes_read == 0)
            error.SetErrorStringWithFormat(
                "read memory from 0x%" PRIx64 " failed", load_addr);
          else
            error.SetErrorStringWithFormat(
                "only %" PRIu64 " of %" PRIu64
                " bytes were read from memory at 0x%" PRIx64,
                (uint64_t)bytes_read, (uint64_t)dst_len, load_addr);
        }
      }
      if (bytes_read) {
        if (load_addr_ptr)
          *load_addr_ptr = load_addr;
        return bytes_read;
      }
      // If the address is not section offset we have an address that doesn't
      // resolve to any address in any currently loaded shared libraries and we
      // failed to read memory so there isn't anything more we can do. If it is
      // section offset, we might be able to read cached memory from the object
      // file.
      if (!resolved_addr.IsSectionOffset())
        return 0;
    }
  }

  if (!prefer_file_cache && resolved_addr.IsSectionOffset()) {
    // If we didn't already try and read from the object file cache, then try
    // it after failing to read from the process.
    return ReadMemoryFromFileCache(resolved_addr, dst, dst_len, error);
  }
  return 0;
}

size_t Target::ReadCStringFromMemory(const Address &addr, std::string &out_str,
                                     Status &error) {
  char buf[256];
  out_str.clear();
  addr_t curr_addr = addr.GetLoadAddress(this);
  Address address(addr);
  while (1) {
    size_t length = ReadCStringFromMemory(address, buf, sizeof(buf), error);
    if (length == 0)
      break;
    out_str.append(buf, length);
    // If we got "length - 1" bytes, we didn't get the whole C string, we need
    // to read some more characters
    if (length == sizeof(buf) - 1)
      curr_addr += length;
    else
      break;
    address = Address(curr_addr);
  }
  return out_str.size();
}

size_t Target::ReadCStringFromMemory(const Address &addr, char *dst,
                                     size_t dst_max_len, Status &result_error) {
  size_t total_cstr_len = 0;
  if (dst && dst_max_len) {
    result_error.Clear();
    // NULL out everything just to be safe
    memset(dst, 0, dst_max_len);
    Status error;
    addr_t curr_addr = addr.GetLoadAddress(this);
    Address address(addr);

    // We could call m_process_sp->GetMemoryCacheLineSize() but I don't think
    // this really needs to be tied to the memory cache subsystem's cache line
    // size, so leave this as a fixed constant.
    const size_t cache_line_size = 512;

    size_t bytes_left = dst_max_len - 1;
    char *curr_dst = dst;

    while (bytes_left > 0) {
      addr_t cache_line_bytes_left =
          cache_line_size - (curr_addr % cache_line_size);
      addr_t bytes_to_read =
          std::min<addr_t>(bytes_left, cache_line_bytes_left);
      size_t bytes_read =
          ReadMemory(address, false, curr_dst, bytes_to_read, error);

      if (bytes_read == 0) {
        result_error = error;
        dst[total_cstr_len] = '\0';
        break;
      }
      const size_t len = strlen(curr_dst);

      total_cstr_len += len;

      if (len < bytes_to_read)
        break;

      curr_dst += bytes_read;
      curr_addr += bytes_read;
      bytes_left -= bytes_read;
      address = Address(curr_addr);
    }
  } else {
    if (dst == nullptr)
      result_error.SetErrorString("invalid arguments");
    else
      result_error.Clear();
  }
  return total_cstr_len;
}

size_t Target::ReadScalarIntegerFromMemory(const Address &addr,
                                           bool prefer_file_cache,
                                           uint32_t byte_size, bool is_signed,
                                           Scalar &scalar, Status &error) {
  uint64_t uval;

  if (byte_size <= sizeof(uval)) {
    size_t bytes_read =
        ReadMemory(addr, prefer_file_cache, &uval, byte_size, error);
    if (bytes_read == byte_size) {
      DataExtractor data(&uval, sizeof(uval), m_arch.GetSpec().GetByteOrder(),
                         m_arch.GetSpec().GetAddressByteSize());
      lldb::offset_t offset = 0;
      if (byte_size <= 4)
        scalar = data.GetMaxU32(&offset, byte_size);
      else
        scalar = data.GetMaxU64(&offset, byte_size);

      if (is_signed)
        scalar.SignExtend(byte_size * 8);
      return bytes_read;
    }
  } else {
    error.SetErrorStringWithFormat(
        "byte size of %u is too large for integer scalar type", byte_size);
  }
  return 0;
}

uint64_t Target::ReadUnsignedIntegerFromMemory(const Address &addr,
                                               bool prefer_file_cache,
                                               size_t integer_byte_size,
                                               uint64_t fail_value,
                                               Status &error) {
  Scalar scalar;
  if (ReadScalarIntegerFromMemory(addr, prefer_file_cache, integer_byte_size,
                                  false, scalar, error))
    return scalar.ULongLong(fail_value);
  return fail_value;
}

bool Target::ReadPointerFromMemory(const Address &addr, bool prefer_file_cache,
                                   Status &error, Address &pointer_addr) {
  Scalar scalar;
  if (ReadScalarIntegerFromMemory(addr, prefer_file_cache,
                                  m_arch.GetSpec().GetAddressByteSize(), false, scalar,
                                  error)) {
    addr_t pointer_vm_addr = scalar.ULongLong(LLDB_INVALID_ADDRESS);
    if (pointer_vm_addr != LLDB_INVALID_ADDRESS) {
      SectionLoadList &section_load_list = GetSectionLoadList();
      if (section_load_list.IsEmpty()) {
        // No sections are loaded, so we must assume we are not running yet and
        // anything we are given is a file address.
        m_images.ResolveFileAddress(pointer_vm_addr, pointer_addr);
      } else {
        // We have at least one section loaded. This can be because we have
        // manually loaded some sections with "target modules load ..." or
        // because we have have a live process that has sections loaded through
        // the dynamic loader
        section_load_list.ResolveLoadAddress(pointer_vm_addr, pointer_addr);
      }
      // We weren't able to resolve the pointer value, so just return an
      // address with no section
      if (!pointer_addr.IsValid())
        pointer_addr.SetOffset(pointer_vm_addr);
      return true;
    }
  }
  return false;
}

ModuleSP Target::GetSharedModule(const ModuleSpec &module_spec,
                                 Status *error_ptr) {
  ModuleSP module_sp;

  Status error;

  // First see if we already have this module in our module list.  If we do,
  // then we're done, we don't need to consult the shared modules list.  But
  // only do this if we are passed a UUID.

  if (module_spec.GetUUID().IsValid())
    module_sp = m_images.FindFirstModule(module_spec);

  if (!module_sp) {
    ModuleSP old_module_sp; // This will get filled in if we have a new version
                            // of the library
    bool did_create_module = false;

    // If there are image search path entries, try to use them first to acquire
    // a suitable image.
    if (m_image_search_paths.GetSize()) {
      ModuleSpec transformed_spec(module_spec);
      if (m_image_search_paths.RemapPath(
              module_spec.GetFileSpec().GetDirectory(),
              transformed_spec.GetFileSpec().GetDirectory())) {
        transformed_spec.GetFileSpec().GetFilename() =
            module_spec.GetFileSpec().GetFilename();
        error = ModuleList::GetSharedModule(transformed_spec, module_sp,
                                            &GetExecutableSearchPaths(),
                                            &old_module_sp, &did_create_module);
      }
    }

    if (!module_sp) {
      // If we have a UUID, we can check our global shared module list in case
      // we already have it. If we don't have a valid UUID, then we can't since
      // the path in "module_spec" will be a platform path, and we will need to
      // let the platform find that file. For example, we could be asking for
      // "/usr/lib/dyld" and if we do not have a UUID, we don't want to pick
      // the local copy of "/usr/lib/dyld" since our platform could be a remote
      // platform that has its own "/usr/lib/dyld" in an SDK or in a local file
      // cache.
      if (module_spec.GetUUID().IsValid()) {
        // We have a UUID, it is OK to check the global module list...
        error = ModuleList::GetSharedModule(module_spec, module_sp,
                                            &GetExecutableSearchPaths(),
                                            &old_module_sp, &did_create_module);
      }

      if (!module_sp) {
        // The platform is responsible for finding and caching an appropriate
        // module in the shared module cache.
        if (m_platform_sp) {
          error = m_platform_sp->GetSharedModule(
              module_spec, m_process_sp.get(), module_sp,
              &GetExecutableSearchPaths(), &old_module_sp, &did_create_module);
        } else {
          error.SetErrorString("no platform is currently set");
        }
      }
    }

    // We found a module that wasn't in our target list.  Let's make sure that
    // there wasn't an equivalent module in the list already, and if there was,
    // let's remove it.
    if (module_sp) {
      ObjectFile *objfile = module_sp->GetObjectFile();
      if (objfile) {
        switch (objfile->GetType()) {
        case ObjectFile::eTypeCoreFile: /// A core file that has a checkpoint of
                                        /// a program's execution state
        case ObjectFile::eTypeExecutable:    /// A normal executable
        case ObjectFile::eTypeDynamicLinker: /// The platform's dynamic linker
                                             /// executable
        case ObjectFile::eTypeObjectFile:    /// An intermediate object file
        case ObjectFile::eTypeSharedLibrary: /// A shared library that can be
                                             /// used during execution
          break;
        case ObjectFile::eTypeDebugInfo: /// An object file that contains only
                                         /// debug information
          if (error_ptr)
            error_ptr->SetErrorString("debug info files aren't valid target "
                                      "modules, please specify an executable");
          return ModuleSP();
        case ObjectFile::eTypeStubLibrary: /// A library that can be linked
                                           /// against but not used for
                                           /// execution
          if (error_ptr)
            error_ptr->SetErrorString("stub libraries aren't valid target "
                                      "modules, please specify an executable");
          return ModuleSP();
        default:
          if (error_ptr)
            error_ptr->SetErrorString(
                "unsupported file type, please specify an executable");
          return ModuleSP();
        }
        // GetSharedModule is not guaranteed to find the old shared module, for
        // instance in the common case where you pass in the UUID, it is only
        // going to find the one module matching the UUID.  In fact, it has no
        // good way to know what the "old module" relevant to this target is,
        // since there might be many copies of a module with this file spec in
        // various running debug sessions, but only one of them will belong to
        // this target. So let's remove the UUID from the module list, and look
        // in the target's module list. Only do this if there is SOMETHING else
        // in the module spec...
        if (!old_module_sp) {
          if (module_spec.GetUUID().IsValid() &&
              !module_spec.GetFileSpec().GetFilename().IsEmpty() &&
              !module_spec.GetFileSpec().GetDirectory().IsEmpty()) {
            ModuleSpec module_spec_copy(module_spec.GetFileSpec());
            module_spec_copy.GetUUID().Clear();

            ModuleList found_modules;
            size_t num_found =
                m_images.FindModules(module_spec_copy, found_modules);
            if (num_found == 1) {
              old_module_sp = found_modules.GetModuleAtIndex(0);
            }
          }
        }

        // Preload symbols outside of any lock, so hopefully we can do this for
        // each library in parallel.
        if (GetPreloadSymbols())
          module_sp->PreloadSymbols();

        if (old_module_sp &&
            m_images.GetIndexForModule(old_module_sp.get()) !=
                LLDB_INVALID_INDEX32) {
          m_images.ReplaceModule(old_module_sp, module_sp);
          Module *old_module_ptr = old_module_sp.get();
          old_module_sp.reset();
          ModuleList::RemoveSharedModuleIfOrphaned(old_module_ptr);
        } else
          m_images.Append(module_sp);
      } else
        module_sp.reset();
    }
  }
  if (error_ptr)
    *error_ptr = error;
  return module_sp;
}

TargetSP Target::CalculateTarget() { return shared_from_this(); }

ProcessSP Target::CalculateProcess() { return m_process_sp; }

ThreadSP Target::CalculateThread() { return ThreadSP(); }

StackFrameSP Target::CalculateStackFrame() { return StackFrameSP(); }

void Target::CalculateExecutionContext(ExecutionContext &exe_ctx) {
  exe_ctx.Clear();
  exe_ctx.SetTargetPtr(this);
}

PathMappingList &Target::GetImageSearchPathList() {
  return m_image_search_paths;
}

void Target::ImageSearchPathsChanged(const PathMappingList &path_list,
                                     void *baton) {
  Target *target = (Target *)baton;
  ModuleSP exe_module_sp(target->GetExecutableModule());
  if (exe_module_sp)
    target->SetExecutableModule(exe_module_sp, eLoadDependentsYes);
}

TypeSystem *Target::GetScratchTypeSystemForLanguage(Status *error,
                                                    lldb::LanguageType language,
                                                    bool create_on_demand) {
  if (!m_valid)
    return nullptr;

  if (error) {
    error->Clear();
  }

  if (language == eLanguageTypeMipsAssembler // GNU AS and LLVM use it for all
                                             // assembly code
      || language == eLanguageTypeUnknown) {
    std::set<lldb::LanguageType> languages_for_types;
    std::set<lldb::LanguageType> languages_for_expressions;

    Language::GetLanguagesSupportingTypeSystems(languages_for_types,
                                                languages_for_expressions);

    if (languages_for_expressions.count(eLanguageTypeC)) {
      language = eLanguageTypeC; // LLDB's default.  Override by setting the
                                 // target language.
    } else {
      if (languages_for_expressions.empty()) {
        return nullptr;
      } else {
        language = *languages_for_expressions.begin();
      }
    }
  }

  return m_scratch_type_system_map.GetTypeSystemForLanguage(language, this,
                                                            create_on_demand);
}

PersistentExpressionState *
Target::GetPersistentExpressionStateForLanguage(lldb::LanguageType language) {
  TypeSystem *type_system =
      GetScratchTypeSystemForLanguage(nullptr, language, true);

  if (type_system) {
    return type_system->GetPersistentExpressionState();
  } else {
    return nullptr;
  }
}

UserExpression *Target::GetUserExpressionForLanguage(
    llvm::StringRef expr, llvm::StringRef prefix, lldb::LanguageType language,
    Expression::ResultType desired_type,
    const EvaluateExpressionOptions &options,
    ValueObject *ctx_obj, Status &error) {
  Status type_system_error;

  TypeSystem *type_system =
      GetScratchTypeSystemForLanguage(&type_system_error, language);
  UserExpression *user_expr = nullptr;

  if (!type_system) {
    error.SetErrorStringWithFormat(
        "Could not find type system for language %s: %s",
        Language::GetNameForLanguageType(language),
        type_system_error.AsCString());
    return nullptr;
  }

  user_expr = type_system->GetUserExpression(expr, prefix, language,
                                             desired_type, options, ctx_obj);
  if (!user_expr)
    error.SetErrorStringWithFormat(
        "Could not create an expression for language %s",
        Language::GetNameForLanguageType(language));

  return user_expr;
}

FunctionCaller *Target::GetFunctionCallerForLanguage(
    lldb::LanguageType language, const CompilerType &return_type,
    const Address &function_address, const ValueList &arg_value_list,
    const char *name, Status &error) {
  Status type_system_error;
  TypeSystem *type_system =
      GetScratchTypeSystemForLanguage(&type_system_error, language);
  FunctionCaller *persistent_fn = nullptr;

  if (!type_system) {
    error.SetErrorStringWithFormat(
        "Could not find type system for language %s: %s",
        Language::GetNameForLanguageType(language),
        type_system_error.AsCString());
    return persistent_fn;
  }

  persistent_fn = type_system->GetFunctionCaller(return_type, function_address,
                                                 arg_value_list, name);
  if (!persistent_fn)
    error.SetErrorStringWithFormat(
        "Could not create an expression for language %s",
        Language::GetNameForLanguageType(language));

  return persistent_fn;
}

UtilityFunction *
Target::GetUtilityFunctionForLanguage(const char *text,
                                      lldb::LanguageType language,
                                      const char *name, Status &error) {
  Status type_system_error;
  TypeSystem *type_system =
      GetScratchTypeSystemForLanguage(&type_system_error, language);
  UtilityFunction *utility_fn = nullptr;

  if (!type_system) {
    error.SetErrorStringWithFormat(
        "Could not find type system for language %s: %s",
        Language::GetNameForLanguageType(language),
        type_system_error.AsCString());
    return utility_fn;
  }

  utility_fn = type_system->GetUtilityFunction(text, name);
  if (!utility_fn)
    error.SetErrorStringWithFormat(
        "Could not create an expression for language %s",
        Language::GetNameForLanguageType(language));

  return utility_fn;
}

ClangASTContext *Target::GetScratchClangASTContext(bool create_on_demand) {
  if (m_valid) {
    if (TypeSystem *type_system = GetScratchTypeSystemForLanguage(
            nullptr, eLanguageTypeC, create_on_demand))
      return llvm::dyn_cast<ClangASTContext>(type_system);
  }
  return nullptr;
}

ClangASTImporterSP Target::GetClangASTImporter() {
  if (m_valid) {
    if (!m_ast_importer_sp) {
      m_ast_importer_sp = std::make_shared<ClangASTImporter>();
    }
    return m_ast_importer_sp;
  }
  return ClangASTImporterSP();
}

void Target::SettingsInitialize() { Process::SettingsInitialize(); }

void Target::SettingsTerminate() { Process::SettingsTerminate(); }

FileSpecList Target::GetDefaultExecutableSearchPaths() {
  TargetPropertiesSP properties_sp(Target::GetGlobalProperties());
  if (properties_sp)
    return properties_sp->GetExecutableSearchPaths();
  return FileSpecList();
}

FileSpecList Target::GetDefaultDebugFileSearchPaths() {
  TargetPropertiesSP properties_sp(Target::GetGlobalProperties());
  if (properties_sp)
    return properties_sp->GetDebugFileSearchPaths();
  return FileSpecList();
}

FileSpecList Target::GetDefaultClangModuleSearchPaths() {
  TargetPropertiesSP properties_sp(Target::GetGlobalProperties());
  if (properties_sp)
    return properties_sp->GetClangModuleSearchPaths();
  return FileSpecList();
}

ArchSpec Target::GetDefaultArchitecture() {
  TargetPropertiesSP properties_sp(Target::GetGlobalProperties());
  if (properties_sp)
    return properties_sp->GetDefaultArchitecture();
  return ArchSpec();
}

void Target::SetDefaultArchitecture(const ArchSpec &arch) {
  TargetPropertiesSP properties_sp(Target::GetGlobalProperties());
  if (properties_sp) {
    LogIfAnyCategoriesSet(
        LIBLLDB_LOG_TARGET, "Target::SetDefaultArchitecture setting target's "
                            "default architecture to  %s (%s)",
        arch.GetArchitectureName(), arch.GetTriple().getTriple().c_str());
    return properties_sp->SetDefaultArchitecture(arch);
  }
}

Target *Target::GetTargetFromContexts(const ExecutionContext *exe_ctx_ptr,
                                      const SymbolContext *sc_ptr) {
  // The target can either exist in the "process" of ExecutionContext, or in
  // the "target_sp" member of SymbolContext. This accessor helper function
  // will get the target from one of these locations.

  Target *target = nullptr;
  if (sc_ptr != nullptr)
    target = sc_ptr->target_sp.get();
  if (target == nullptr && exe_ctx_ptr)
    target = exe_ctx_ptr->GetTargetPtr();
  return target;
}

ExpressionResults Target::EvaluateExpression(
    llvm::StringRef expr, ExecutionContextScope *exe_scope,
    lldb::ValueObjectSP &result_valobj_sp,
    const EvaluateExpressionOptions &options, std::string *fixed_expression,
    ValueObject *ctx_obj) {
  result_valobj_sp.reset();

  ExpressionResults execution_results = eExpressionSetupError;

  if (expr.empty())
    return execution_results;

  // We shouldn't run stop hooks in expressions. Be sure to reset this if you
  // return anywhere within this function.
  bool old_suppress_value = m_suppress_stop_hooks;
  m_suppress_stop_hooks = true;

  ExecutionContext exe_ctx;

  if (exe_scope) {
    exe_scope->CalculateExecutionContext(exe_ctx);
  } else if (m_process_sp) {
    m_process_sp->CalculateExecutionContext(exe_ctx);
  } else {
    CalculateExecutionContext(exe_ctx);
  }

  // Make sure we aren't just trying to see the value of a persistent variable
  // (something like "$0")
  lldb::ExpressionVariableSP persistent_var_sp;
  // Only check for persistent variables the expression starts with a '$'
  if (expr[0] == '$')
    persistent_var_sp = GetScratchTypeSystemForLanguage(nullptr, eLanguageTypeC)
                            ->GetPersistentExpressionState()
                            ->GetVariable(expr);

  if (persistent_var_sp) {
    result_valobj_sp = persistent_var_sp->GetValueObject();
    execution_results = eExpressionCompleted;
  } else {
    llvm::StringRef prefix = GetExpressionPrefixContents();
    Status error;
    execution_results = UserExpression::Evaluate(exe_ctx, options, expr, prefix,
                                                 result_valobj_sp, error,
                                                 0, // Line Number
                                                 fixed_expression,
                                                 nullptr, // Module
                                                 ctx_obj);
  }

  m_suppress_stop_hooks = old_suppress_value;

  return execution_results;
}

lldb::ExpressionVariableSP
Target::GetPersistentVariable(const ConstString &name) {
  lldb::ExpressionVariableSP variable_sp;
  m_scratch_type_system_map.ForEach(
      [name, &variable_sp](TypeSystem *type_system) -> bool {
        if (PersistentExpressionState *persistent_state =
                type_system->GetPersistentExpressionState()) {
          variable_sp = persistent_state->GetVariable(name);

          if (variable_sp)
            return false; // Stop iterating the ForEach
        }
        return true; // Keep iterating the ForEach
      });
  return variable_sp;
}

lldb::addr_t Target::GetPersistentSymbol(const ConstString &name) {
  lldb::addr_t address = LLDB_INVALID_ADDRESS;

  m_scratch_type_system_map.ForEach(
      [name, &address](TypeSystem *type_system) -> bool {
        if (PersistentExpressionState *persistent_state =
                type_system->GetPersistentExpressionState()) {
          address = persistent_state->LookupSymbol(name);
          if (address != LLDB_INVALID_ADDRESS)
            return false; // Stop iterating the ForEach
        }
        return true; // Keep iterating the ForEach
      });
  return address;
}

lldb::addr_t Target::GetCallableLoadAddress(lldb::addr_t load_addr,
                                            AddressClass addr_class) const {
  auto arch_plugin = GetArchitecturePlugin();
  return arch_plugin ?
      arch_plugin->GetCallableLoadAddress(load_addr, addr_class) : load_addr;
}

lldb::addr_t Target::GetOpcodeLoadAddress(lldb::addr_t load_addr,
                                          AddressClass addr_class) const {
  auto arch_plugin = GetArchitecturePlugin();
  return arch_plugin ?
      arch_plugin->GetOpcodeLoadAddress(load_addr, addr_class) : load_addr;
}

lldb::addr_t Target::GetBreakableLoadAddress(lldb::addr_t addr) {
  auto arch_plugin = GetArchitecturePlugin();
  return arch_plugin ?
      arch_plugin->GetBreakableLoadAddress(addr, *this) : addr;
}

SourceManager &Target::GetSourceManager() {
  if (!m_source_manager_up)
    m_source_manager_up.reset(new SourceManager(shared_from_this()));
  return *m_source_manager_up;
}

ClangModulesDeclVendor *Target::GetClangModulesDeclVendor() {
  static std::mutex s_clang_modules_decl_vendor_mutex; // If this is contended
                                                       // we can make it
                                                       // per-target

  {
    std::lock_guard<std::mutex> guard(s_clang_modules_decl_vendor_mutex);

    if (!m_clang_modules_decl_vendor_up) {
      m_clang_modules_decl_vendor_up.reset(
          ClangModulesDeclVendor::Create(*this));
    }
  }

  return m_clang_modules_decl_vendor_up.get();
}

Target::StopHookSP Target::CreateStopHook() {
  lldb::user_id_t new_uid = ++m_stop_hook_next_id;
  Target::StopHookSP stop_hook_sp(new StopHook(shared_from_this(), new_uid));
  m_stop_hooks[new_uid] = stop_hook_sp;
  return stop_hook_sp;
}

bool Target::RemoveStopHookByID(lldb::user_id_t user_id) {
  size_t num_removed = m_stop_hooks.erase(user_id);
  return (num_removed != 0);
}

void Target::RemoveAllStopHooks() { m_stop_hooks.clear(); }

Target::StopHookSP Target::GetStopHookByID(lldb::user_id_t user_id) {
  StopHookSP found_hook;

  StopHookCollection::iterator specified_hook_iter;
  specified_hook_iter = m_stop_hooks.find(user_id);
  if (specified_hook_iter != m_stop_hooks.end())
    found_hook = (*specified_hook_iter).second;
  return found_hook;
}

bool Target::SetStopHookActiveStateByID(lldb::user_id_t user_id,
                                        bool active_state) {
  StopHookCollection::iterator specified_hook_iter;
  specified_hook_iter = m_stop_hooks.find(user_id);
  if (specified_hook_iter == m_stop_hooks.end())
    return false;

  (*specified_hook_iter).second->SetIsActive(active_state);
  return true;
}

void Target::SetAllStopHooksActiveState(bool active_state) {
  StopHookCollection::iterator pos, end = m_stop_hooks.end();
  for (pos = m_stop_hooks.begin(); pos != end; pos++) {
    (*pos).second->SetIsActive(active_state);
  }
}

void Target::RunStopHooks() {
  if (m_suppress_stop_hooks)
    return;

  if (!m_process_sp)
    return;
    
  // Somebody might have restarted the process:
  if (m_process_sp->GetState() != eStateStopped)
    return;

  // <rdar://problem/12027563> make sure we check that we are not stopped
  // because of us running a user expression since in that case we do not want
  // to run the stop-hooks
  if (m_process_sp->GetModIDRef().IsLastResumeForUserExpression())
    return;

  if (m_stop_hooks.empty())
    return;

  StopHookCollection::iterator pos, end = m_stop_hooks.end();

  // If there aren't any active stop hooks, don't bother either.
  // Also see if any of the active hooks want to auto-continue.
  bool any_active_hooks = false;
  bool auto_continue = false;
  for (auto hook : m_stop_hooks) {
    if (hook.second->IsActive()) {
      any_active_hooks = true;
      auto_continue |= hook.second->GetAutoContinue();
    }
  }
  if (!any_active_hooks)
    return;

  CommandReturnObject result;

  std::vector<ExecutionContext> exc_ctx_with_reasons;
  std::vector<SymbolContext> sym_ctx_with_reasons;

  ThreadList &cur_threadlist = m_process_sp->GetThreadList();
  size_t num_threads = cur_threadlist.GetSize();
  for (size_t i = 0; i < num_threads; i++) {
    lldb::ThreadSP cur_thread_sp = cur_threadlist.GetThreadAtIndex(i);
    if (cur_thread_sp->ThreadStoppedForAReason()) {
      lldb::StackFrameSP cur_frame_sp = cur_thread_sp->GetStackFrameAtIndex(0);
      exc_ctx_with_reasons.push_back(ExecutionContext(
          m_process_sp.get(), cur_thread_sp.get(), cur_frame_sp.get()));
      sym_ctx_with_reasons.push_back(
          cur_frame_sp->GetSymbolContext(eSymbolContextEverything));
    }
  }

  // If no threads stopped for a reason, don't run the stop-hooks.
  size_t num_exe_ctx = exc_ctx_with_reasons.size();
  if (num_exe_ctx == 0)
    return;

  result.SetImmediateOutputStream(m_debugger.GetAsyncOutputStream());
  result.SetImmediateErrorStream(m_debugger.GetAsyncErrorStream());

  bool keep_going = true;
  bool hooks_ran = false;
  bool print_hook_header = (m_stop_hooks.size() != 1);
  bool print_thread_header = (num_exe_ctx != 1);
  bool did_restart = false;

  for (pos = m_stop_hooks.begin(); keep_going && pos != end; pos++) {
    // result.Clear();
    StopHookSP cur_hook_sp = (*pos).second;
    if (!cur_hook_sp->IsActive())
      continue;

    bool any_thread_matched = false;
    for (size_t i = 0; keep_going && i < num_exe_ctx; i++) {
      if ((cur_hook_sp->GetSpecifier() == nullptr ||
           cur_hook_sp->GetSpecifier()->SymbolContextMatches(
               sym_ctx_with_reasons[i])) &&
          (cur_hook_sp->GetThreadSpecifier() == nullptr ||
           cur_hook_sp->GetThreadSpecifier()->ThreadPassesBasicTests(
               exc_ctx_with_reasons[i].GetThreadRef()))) {
        if (!hooks_ran) {
          hooks_ran = true;
        }
        if (print_hook_header && !any_thread_matched) {
          const char *cmd =
              (cur_hook_sp->GetCommands().GetSize() == 1
                   ? cur_hook_sp->GetCommands().GetStringAtIndex(0)
                   : nullptr);
          if (cmd)
            result.AppendMessageWithFormat("\n- Hook %" PRIu64 " (%s)\n",
                                           cur_hook_sp->GetID(), cmd);
          else
            result.AppendMessageWithFormat("\n- Hook %" PRIu64 "\n",
                                           cur_hook_sp->GetID());
          any_thread_matched = true;
        }

        if (print_thread_header)
          result.AppendMessageWithFormat(
              "-- Thread %d\n",
              exc_ctx_with_reasons[i].GetThreadPtr()->GetIndexID());

        CommandInterpreterRunOptions options;
        options.SetStopOnContinue(true);
        options.SetStopOnError(true);
        options.SetEchoCommands(false);
        options.SetPrintResults(true);
        options.SetAddToHistory(false);

        // Force Async:
        bool old_async = GetDebugger().GetAsyncExecution();
        GetDebugger().SetAsyncExecution(true);
        GetDebugger().GetCommandInterpreter().HandleCommands(
            cur_hook_sp->GetCommands(), &exc_ctx_with_reasons[i], options,
            result);
        GetDebugger().SetAsyncExecution(old_async);
        // If the command started the target going again, we should bag out of
        // running the stop hooks.
        if ((result.GetStatus() == eReturnStatusSuccessContinuingNoResult) ||
            (result.GetStatus() == eReturnStatusSuccessContinuingResult)) {
          // But only complain if there were more stop hooks to do:
          StopHookCollection::iterator tmp = pos;
          if (++tmp != end)
            result.AppendMessageWithFormat("\nAborting stop hooks, hook %" PRIu64
                                           " set the program running.\n"
                                           "  Consider using '-G true' to make "
                                           "stop hooks auto-continue.\n",
                                           cur_hook_sp->GetID());
          keep_going = false;
          did_restart = true;
        }
      }
    }
  }
  // Finally, if auto-continue was requested, do it now:
  if (!did_restart && auto_continue)
    m_process_sp->PrivateResume();

  result.GetImmediateOutputStream()->Flush();
  result.GetImmediateErrorStream()->Flush();
}

const TargetPropertiesSP &Target::GetGlobalProperties() {
  // NOTE: intentional leak so we don't crash if global destructor chain gets
  // called as other threads still use the result of this function
  static TargetPropertiesSP *g_settings_sp_ptr =
      new TargetPropertiesSP(new TargetProperties(nullptr));
  return *g_settings_sp_ptr;
}

Status Target::Install(ProcessLaunchInfo *launch_info) {
  Status error;
  PlatformSP platform_sp(GetPlatform());
  if (platform_sp) {
    if (platform_sp->IsRemote()) {
      if (platform_sp->IsConnected()) {
        // Install all files that have an install path, and always install the
        // main executable when connected to a remote platform
        const ModuleList &modules = GetImages();
        const size_t num_images = modules.GetSize();
        for (size_t idx = 0; idx < num_images; ++idx) {
          ModuleSP module_sp(modules.GetModuleAtIndex(idx));
          if (module_sp) {
            const bool is_main_executable = module_sp == GetExecutableModule();
            FileSpec local_file(module_sp->GetFileSpec());
            if (local_file) {
              FileSpec remote_file(module_sp->GetRemoteInstallFileSpec());
              if (!remote_file) {
                if (is_main_executable) // TODO: add setting for always
                                        // installing main executable???
                {
                  // Always install the main executable
                  remote_file = platform_sp->GetRemoteWorkingDirectory();
                  remote_file.AppendPathComponent(
                      module_sp->GetFileSpec().GetFilename().GetCString());
                }
              }
              if (remote_file) {
                error = platform_sp->Install(local_file, remote_file);
                if (error.Success()) {
                  module_sp->SetPlatformFileSpec(remote_file);
                  if (is_main_executable) {
                    platform_sp->SetFilePermissions(remote_file, 0700);
                    if (launch_info)
                      launch_info->SetExecutableFile(remote_file, false);
                  }
                } else
                  break;
              }
            }
          }
        }
      }
    }
  }
  return error;
}

bool Target::ResolveLoadAddress(addr_t load_addr, Address &so_addr,
                                uint32_t stop_id) {
  return m_section_load_history.ResolveLoadAddress(stop_id, load_addr, so_addr);
}

bool Target::ResolveFileAddress(lldb::addr_t file_addr,
                                Address &resolved_addr) {
  return m_images.ResolveFileAddress(file_addr, resolved_addr);
}

bool Target::SetSectionLoadAddress(const SectionSP &section_sp,
                                   addr_t new_section_load_addr,
                                   bool warn_multiple) {
  const addr_t old_section_load_addr =
      m_section_load_history.GetSectionLoadAddress(
          SectionLoadHistory::eStopIDNow, section_sp);
  if (old_section_load_addr != new_section_load_addr) {
    uint32_t stop_id = 0;
    ProcessSP process_sp(GetProcessSP());
    if (process_sp)
      stop_id = process_sp->GetStopID();
    else
      stop_id = m_section_load_history.GetLastStopID();
    if (m_section_load_history.SetSectionLoadAddress(
            stop_id, section_sp, new_section_load_addr, warn_multiple))
      return true; // Return true if the section load address was changed...
  }
  return false; // Return false to indicate nothing changed
}

size_t Target::UnloadModuleSections(const ModuleList &module_list) {
  size_t section_unload_count = 0;
  size_t num_modules = module_list.GetSize();
  for (size_t i = 0; i < num_modules; ++i) {
    section_unload_count +=
        UnloadModuleSections(module_list.GetModuleAtIndex(i));
  }
  return section_unload_count;
}

size_t Target::UnloadModuleSections(const lldb::ModuleSP &module_sp) {
  uint32_t stop_id = 0;
  ProcessSP process_sp(GetProcessSP());
  if (process_sp)
    stop_id = process_sp->GetStopID();
  else
    stop_id = m_section_load_history.GetLastStopID();
  SectionList *sections = module_sp->GetSectionList();
  size_t section_unload_count = 0;
  if (sections) {
    const uint32_t num_sections = sections->GetNumSections(0);
    for (uint32_t i = 0; i < num_sections; ++i) {
      section_unload_count += m_section_load_history.SetSectionUnloaded(
          stop_id, sections->GetSectionAtIndex(i));
    }
  }
  return section_unload_count;
}

bool Target::SetSectionUnloaded(const lldb::SectionSP &section_sp) {
  uint32_t stop_id = 0;
  ProcessSP process_sp(GetProcessSP());
  if (process_sp)
    stop_id = process_sp->GetStopID();
  else
    stop_id = m_section_load_history.GetLastStopID();
  return m_section_load_history.SetSectionUnloaded(stop_id, section_sp);
}

bool Target::SetSectionUnloaded(const lldb::SectionSP &section_sp,
                                addr_t load_addr) {
  uint32_t stop_id = 0;
  ProcessSP process_sp(GetProcessSP());
  if (process_sp)
    stop_id = process_sp->GetStopID();
  else
    stop_id = m_section_load_history.GetLastStopID();
  return m_section_load_history.SetSectionUnloaded(stop_id, section_sp,
                                                   load_addr);
}

void Target::ClearAllLoadedSections() { m_section_load_history.Clear(); }

Status Target::Launch(ProcessLaunchInfo &launch_info, Stream *stream) {
  Status error;
  Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_TARGET));

  if (log)
    log->Printf("Target::%s() called for %s", __FUNCTION__,
                launch_info.GetExecutableFile().GetPath().c_str());

  StateType state = eStateInvalid;

  // Scope to temporarily get the process state in case someone has manually
  // remotely connected already to a process and we can skip the platform
  // launching.
  {
    ProcessSP process_sp(GetProcessSP());

    if (process_sp) {
      state = process_sp->GetState();
      if (log)
        log->Printf(
            "Target::%s the process exists, and its current state is %s",
            __FUNCTION__, StateAsCString(state));
    } else {
      if (log)
        log->Printf("Target::%s the process instance doesn't currently exist.",
                    __FUNCTION__);
    }
  }

  launch_info.GetFlags().Set(eLaunchFlagDebug);

  // Get the value of synchronous execution here.  If you wait till after you
  // have started to run, then you could have hit a breakpoint, whose command
  // might switch the value, and then you'll pick up that incorrect value.
  Debugger &debugger = GetDebugger();
  const bool synchronous_execution =
      debugger.GetCommandInterpreter().GetSynchronous();

  PlatformSP platform_sp(GetPlatform());

  FinalizeFileActions(launch_info);

  if (state == eStateConnected) {
    if (launch_info.GetFlags().Test(eLaunchFlagLaunchInTTY)) {
      error.SetErrorString(
          "can't launch in tty when launching through a remote connection");
      return error;
    }
  }

  if (!launch_info.GetArchitecture().IsValid())
    launch_info.GetArchitecture() = GetArchitecture();

  // If we're not already connected to the process, and if we have a platform
  // that can launch a process for debugging, go ahead and do that here.
  if (state != eStateConnected && platform_sp &&
      platform_sp->CanDebugProcess()) {
    if (log)
      log->Printf("Target::%s asking the platform to debug the process",
                  __FUNCTION__);

    // If there was a previous process, delete it before we make the new one.
    // One subtle point, we delete the process before we release the reference
    // to m_process_sp.  That way even if we are the last owner, the process
    // will get Finalized before it gets destroyed.
    DeleteCurrentProcess();
    
    m_process_sp =
        GetPlatform()->DebugProcess(launch_info, debugger, this, error);

  } else {
    if (log)
      log->Printf("Target::%s the platform doesn't know how to debug a "
                  "process, getting a process plugin to do this for us.",
                  __FUNCTION__);

    if (state == eStateConnected) {
      assert(m_process_sp);
    } else {
      // Use a Process plugin to construct the process.
      const char *plugin_name = launch_info.GetProcessPluginName();
      CreateProcess(launch_info.GetListener(), plugin_name, nullptr);
    }

    // Since we didn't have a platform launch the process, launch it here.
    if (m_process_sp)
      error = m_process_sp->Launch(launch_info);
  }

  if (!m_process_sp) {
    if (error.Success())
      error.SetErrorString("failed to launch or debug process");
    return error;
  }

  if (error.Success()) {
    if (synchronous_execution ||
        !launch_info.GetFlags().Test(eLaunchFlagStopAtEntry)) {
      ListenerSP hijack_listener_sp(launch_info.GetHijackListener());
      if (!hijack_listener_sp) {
        hijack_listener_sp =
            Listener::MakeListener("lldb.Target.Launch.hijack");
        launch_info.SetHijackListener(hijack_listener_sp);
        m_process_sp->HijackProcessEvents(hijack_listener_sp);
      }

      StateType state = m_process_sp->WaitForProcessToStop(
          llvm::None, nullptr, false, hijack_listener_sp, nullptr);

      if (state == eStateStopped) {
        if (!launch_info.GetFlags().Test(eLaunchFlagStopAtEntry)) {
          if (synchronous_execution) {
            error = m_process_sp->PrivateResume();
            if (error.Success()) {
              state = m_process_sp->WaitForProcessToStop(
                  llvm::None, nullptr, true, hijack_listener_sp, stream);
              const bool must_be_alive =
                  false; // eStateExited is ok, so this must be false
              if (!StateIsStoppedState(state, must_be_alive)) {
                error.SetErrorStringWithFormat("process isn't stopped: %s",
                                               StateAsCString(state));
              }
            }
          } else {
            m_process_sp->RestoreProcessEvents();
            error = m_process_sp->PrivateResume();
          }
          if (!error.Success()) {
            Status error2;
            error2.SetErrorStringWithFormat(
                "process resume at entry point failed: %s", error.AsCString());
            error = error2;
          }
        }
      } else if (state == eStateExited) {
        bool with_shell = !!launch_info.GetShell();
        const int exit_status = m_process_sp->GetExitStatus();
        const char *exit_desc = m_process_sp->GetExitDescription();
#define LAUNCH_SHELL_MESSAGE                                                   \
  "\n'r' and 'run' are aliases that default to launching through a "           \
  "shell.\nTry launching without going through a shell by using 'process "     \
  "launch'."
        if (exit_desc && exit_desc[0]) {
          if (with_shell)
            error.SetErrorStringWithFormat(
                "process exited with status %i (%s)" LAUNCH_SHELL_MESSAGE,
                exit_status, exit_desc);
          else
            error.SetErrorStringWithFormat("process exited with status %i (%s)",
                                           exit_status, exit_desc);
        } else {
          if (with_shell)
            error.SetErrorStringWithFormat(
                "process exited with status %i" LAUNCH_SHELL_MESSAGE,
                exit_status);
          else
            error.SetErrorStringWithFormat("process exited with status %i",
                                           exit_status);
        }
      } else {
        error.SetErrorStringWithFormat(
            "initial process state wasn't stopped: %s", StateAsCString(state));
      }
    }
    m_process_sp->RestoreProcessEvents();
  } else {
    Status error2;
    error2.SetErrorStringWithFormat("process launch failed: %s",
                                    error.AsCString());
    error = error2;
  }
  return error;
}

Status Target::Attach(ProcessAttachInfo &attach_info, Stream *stream) {
  auto state = eStateInvalid;
  auto process_sp = GetProcessSP();
  if (process_sp) {
    state = process_sp->GetState();
    if (process_sp->IsAlive() && state != eStateConnected) {
      if (state == eStateAttaching)
        return Status("process attach is in progress");
      return Status("a process is already being debugged");
    }
  }

  const ModuleSP old_exec_module_sp = GetExecutableModule();

  // If no process info was specified, then use the target executable name as
  // the process to attach to by default
  if (!attach_info.ProcessInfoSpecified()) {
    if (old_exec_module_sp)
      attach_info.GetExecutableFile().GetFilename() =
          old_exec_module_sp->GetPlatformFileSpec().GetFilename();

    if (!attach_info.ProcessInfoSpecified()) {
      return Status("no process specified, create a target with a file, or "
                    "specify the --pid or --name");
    }
  }

  const auto platform_sp =
      GetDebugger().GetPlatformList().GetSelectedPlatform();
  ListenerSP hijack_listener_sp;
  const bool async = attach_info.GetAsync();
  if (!async) {
    hijack_listener_sp =
        Listener::MakeListener("lldb.Target.Attach.attach.hijack");
    attach_info.SetHijackListener(hijack_listener_sp);
  }

  Status error;
  if (state != eStateConnected && platform_sp != nullptr &&
      platform_sp->CanDebugProcess()) {
    SetPlatform(platform_sp);
    process_sp = platform_sp->Attach(attach_info, GetDebugger(), this, error);
  } else {
    if (state != eStateConnected) {
      const char *plugin_name = attach_info.GetProcessPluginName();
      process_sp =
          CreateProcess(attach_info.GetListenerForProcess(GetDebugger()),
                        plugin_name, nullptr);
      if (process_sp == nullptr) {
        error.SetErrorStringWithFormat(
            "failed to create process using plugin %s",
            (plugin_name) ? plugin_name : "null");
        return error;
      }
    }
    if (hijack_listener_sp)
      process_sp->HijackProcessEvents(hijack_listener_sp);
    error = process_sp->Attach(attach_info);
  }

  if (error.Success() && process_sp) {
    if (async) {
      process_sp->RestoreProcessEvents();
    } else {
      state = process_sp->WaitForProcessToStop(
          llvm::None, nullptr, false, attach_info.GetHijackListener(), stream);
      process_sp->RestoreProcessEvents();

      if (state != eStateStopped) {
        const char *exit_desc = process_sp->GetExitDescription();
        if (exit_desc)
          error.SetErrorStringWithFormat("%s", exit_desc);
        else
          error.SetErrorString(
              "process did not stop (no such process or permission problem?)");
        process_sp->Destroy(false);
      }
    }
  }
  return error;
}

void Target::FinalizeFileActions(ProcessLaunchInfo &info) {
  Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_PROCESS));

  // Finalize the file actions, and if none were given, default to opening up a
  // pseudo terminal
  PlatformSP platform_sp = GetPlatform();
  const bool default_to_use_pty =
      m_platform_sp ? m_platform_sp->IsHost() : false;
  LLDB_LOG(
      log,
      "have platform={0}, platform_sp->IsHost()={1}, default_to_use_pty={2}",
      bool(platform_sp),
      platform_sp ? (platform_sp->IsHost() ? "true" : "false") : "n/a",
      default_to_use_pty);

  // If nothing for stdin or stdout or stderr was specified, then check the
  // process for any default settings that were set with "settings set"
  if (info.GetFileActionForFD(STDIN_FILENO) == nullptr ||
      info.GetFileActionForFD(STDOUT_FILENO) == nullptr ||
      info.GetFileActionForFD(STDERR_FILENO) == nullptr) {
    LLDB_LOG(log, "at least one of stdin/stdout/stderr was not set, evaluating "
                  "default handling");

    if (info.GetFlags().Test(eLaunchFlagLaunchInTTY)) {
      // Do nothing, if we are launching in a remote terminal no file actions
      // should be done at all.
      return;
    }

    if (info.GetFlags().Test(eLaunchFlagDisableSTDIO)) {
      LLDB_LOG(log, "eLaunchFlagDisableSTDIO set, adding suppression action "
                    "for stdin, stdout and stderr");
      info.AppendSuppressFileAction(STDIN_FILENO, true, false);
      info.AppendSuppressFileAction(STDOUT_FILENO, false, true);
      info.AppendSuppressFileAction(STDERR_FILENO, false, true);
    } else {
      // Check for any values that might have gotten set with any of: (lldb)
      // settings set target.input-path (lldb) settings set target.output-path
      // (lldb) settings set target.error-path
      FileSpec in_file_spec;
      FileSpec out_file_spec;
      FileSpec err_file_spec;
      // Only override with the target settings if we don't already have an
      // action for in, out or error
      if (info.GetFileActionForFD(STDIN_FILENO) == nullptr)
        in_file_spec = GetStandardInputPath();
      if (info.GetFileActionForFD(STDOUT_FILENO) == nullptr)
        out_file_spec = GetStandardOutputPath();
      if (info.GetFileActionForFD(STDERR_FILENO) == nullptr)
        err_file_spec = GetStandardErrorPath();

      LLDB_LOG(log, "target stdin='{0}', target stdout='{1}', stderr='{1}'",
               in_file_spec, out_file_spec, err_file_spec);

      if (in_file_spec) {
        info.AppendOpenFileAction(STDIN_FILENO, in_file_spec, true, false);
        LLDB_LOG(log, "appended stdin open file action for {0}", in_file_spec);
      }

      if (out_file_spec) {
        info.AppendOpenFileAction(STDOUT_FILENO, out_file_spec, false, true);
        LLDB_LOG(log, "appended stdout open file action for {0}",
                 out_file_spec);
      }

      if (err_file_spec) {
        info.AppendOpenFileAction(STDERR_FILENO, err_file_spec, false, true);
        LLDB_LOG(log, "appended stderr open file action for {0}",
                 err_file_spec);
      }

      if (default_to_use_pty &&
          (!in_file_spec || !out_file_spec || !err_file_spec)) {
        llvm::Error Err = info.SetUpPtyRedirection();
        LLDB_LOG_ERROR(log, std::move(Err), "SetUpPtyRedirection failed: {0}");
      }
    }
  }
}

//--------------------------------------------------------------
// Target::StopHook
//--------------------------------------------------------------
Target::StopHook::StopHook(lldb::TargetSP target_sp, lldb::user_id_t uid)
    : UserID(uid), m_target_sp(target_sp), m_commands(), m_specifier_sp(),
      m_thread_spec_up() {}

Target::StopHook::StopHook(const StopHook &rhs)
    : UserID(rhs.GetID()), m_target_sp(rhs.m_target_sp),
      m_commands(rhs.m_commands), m_specifier_sp(rhs.m_specifier_sp),
      m_thread_spec_up(), m_active(rhs.m_active),
      m_auto_continue(rhs.m_auto_continue) {
  if (rhs.m_thread_spec_up)
    m_thread_spec_up.reset(new ThreadSpec(*rhs.m_thread_spec_up));
}

Target::StopHook::~StopHook() = default;

void Target::StopHook::SetSpecifier(SymbolContextSpecifier *specifier) {
  m_specifier_sp.reset(specifier);
}

void Target::StopHook::SetThreadSpecifier(ThreadSpec *specifier) {
  m_thread_spec_up.reset(specifier);
}

void Target::StopHook::GetDescription(Stream *s,
                                      lldb::DescriptionLevel level) const {
  int indent_level = s->GetIndentLevel();

  s->SetIndentLevel(indent_level + 2);

  s->Printf("Hook: %" PRIu64 "\n", GetID());
  if (m_active)
    s->Indent("State: enabled\n");
  else
    s->Indent("State: disabled\n");

  if (m_auto_continue)
    s->Indent("AutoContinue on\n");

  if (m_specifier_sp) {
    s->Indent();
    s->PutCString("Specifier:\n");
    s->SetIndentLevel(indent_level + 4);
    m_specifier_sp->GetDescription(s, level);
    s->SetIndentLevel(indent_level + 2);
  }

  if (m_thread_spec_up) {
    StreamString tmp;
    s->Indent("Thread:\n");
    m_thread_spec_up->GetDescription(&tmp, level);
    s->SetIndentLevel(indent_level + 4);
    s->Indent(tmp.GetString());
    s->PutCString("\n");
    s->SetIndentLevel(indent_level + 2);
  }

  s->Indent("Commands: \n");
  s->SetIndentLevel(indent_level + 4);
  uint32_t num_commands = m_commands.GetSize();
  for (uint32_t i = 0; i < num_commands; i++) {
    s->Indent(m_commands.GetStringAtIndex(i));
    s->PutCString("\n");
  }
  s->SetIndentLevel(indent_level);
}

//--------------------------------------------------------------
// class TargetProperties
//--------------------------------------------------------------

// clang-format off
static constexpr OptionEnumValueElement g_dynamic_value_types[] = {
    {eNoDynamicValues, "no-dynamic-values",
     "Don't calculate the dynamic type of values"},
    {eDynamicCanRunTarget, "run-target", "Calculate the dynamic type of values "
                                         "even if you have to run the target."},
    {eDynamicDontRunTarget, "no-run-target",
     "Calculate the dynamic type of values, but don't run the target."} };

OptionEnumValues lldb_private::GetDynamicValueTypes() {
  return OptionEnumValues(g_dynamic_value_types);
}

static constexpr OptionEnumValueElement g_inline_breakpoint_enums[] = {
    {eInlineBreakpointsNever, "never", "Never look for inline breakpoint "
                                       "locations (fastest). This setting "
                                       "should only be used if you know that "
                                       "no inlining occurs in your programs."},
    {eInlineBreakpointsHeaders, "headers",
     "Only check for inline breakpoint locations when setting breakpoints in "
     "header files, but not when setting breakpoint in implementation source "
     "files (default)."},
    {eInlineBreakpointsAlways, "always",
     "Always look for inline breakpoint locations when setting file and line "
     "breakpoints (slower but most accurate)."} };

typedef enum x86DisassemblyFlavor {
  eX86DisFlavorDefault,
  eX86DisFlavorIntel,
  eX86DisFlavorATT
} x86DisassemblyFlavor;

static constexpr OptionEnumValueElement g_x86_dis_flavor_value_types[] = {
    {eX86DisFlavorDefault, "default", "Disassembler default (currently att)."},
    {eX86DisFlavorIntel, "intel", "Intel disassembler flavor."},
    {eX86DisFlavorATT, "att", "AT&T disassembler flavor."} };

static constexpr OptionEnumValueElement g_hex_immediate_style_values[] = {
    {Disassembler::eHexStyleC, "c", "C-style (0xffff)."},
    {Disassembler::eHexStyleAsm, "asm", "Asm-style (0ffffh)."} };

static constexpr OptionEnumValueElement g_load_script_from_sym_file_values[] = {
    {eLoadScriptFromSymFileTrue, "true",
     "Load debug scripts inside symbol files"},
    {eLoadScriptFromSymFileFalse, "false",
     "Do not load debug scripts inside symbol files."},
    {eLoadScriptFromSymFileWarn, "warn",
     "Warn about debug scripts inside symbol files but do not load them."} };

static constexpr
OptionEnumValueElement g_load_current_working_dir_lldbinit_values[] = {
    {eLoadCWDlldbinitTrue, "true",
     "Load .lldbinit files from current directory"},
    {eLoadCWDlldbinitFalse, "false",
     "Do not load .lldbinit files from current directory"},
    {eLoadCWDlldbinitWarn, "warn",
     "Warn about loading .lldbinit files from current directory"} };

static constexpr OptionEnumValueElement g_memory_module_load_level_values[] = {
    {eMemoryModuleLoadLevelMinimal, "minimal",
     "Load minimal information when loading modules from memory. Currently "
     "this setting loads sections only."},
    {eMemoryModuleLoadLevelPartial, "partial",
     "Load partial information when loading modules from memory. Currently "
     "this setting loads sections and function bounds."},
    {eMemoryModuleLoadLevelComplete, "complete",
     "Load complete information when loading modules from memory. Currently "
     "this setting loads sections and all symbols."} };

static constexpr PropertyDefinition g_properties[] = {
    {"default-arch", OptionValue::eTypeArch, true, 0, nullptr, {},
     "Default architecture to choose, when there's a choice."},
    {"move-to-nearest-code", OptionValue::eTypeBoolean, false, true, nullptr,
     {}, "Move breakpoints to nearest code."},
    {"language", OptionValue::eTypeLanguage, false, eLanguageTypeUnknown,
     nullptr, {},
     "The language to use when interpreting expressions entered in commands."},
    {"expr-prefix", OptionValue::eTypeFileSpec, false, 0, nullptr, {},
     "Path to a file containing expressions to be prepended to all "
     "expressions."},
    {"prefer-dynamic-value", OptionValue::eTypeEnum, false,
     eDynamicDontRunTarget, nullptr, OptionEnumValues(g_dynamic_value_types),
     "Should printed values be shown as their dynamic value."},
    {"enable-synthetic-value", OptionValue::eTypeBoolean, false, true, nullptr,
     {}, "Should synthetic values be used by default whenever available."},
    {"skip-prologue", OptionValue::eTypeBoolean, false, true, nullptr, {},
     "Skip function prologues when setting breakpoints by name."},
    {"source-map", OptionValue::eTypePathMap, false, 0, nullptr, {},
     "Source path remappings are used to track the change of location between "
     "a source file when built, and "
     "where it exists on the current system.  It consists of an array of "
     "duples, the first element of each duple is "
     "some part (starting at the root) of the path to the file when it was "
     "built, "
     "and the second is where the remainder of the original build hierarchy is "
     "rooted on the local system.  "
     "Each element of the array is checked in order and the first one that "
     "results in a match wins."},
    {"exec-search-paths", OptionValue::eTypeFileSpecList, false, 0, nullptr,
     {}, "Executable search paths to use when locating executable files "
         "whose paths don't match the local file system."},
    {"debug-file-search-paths", OptionValue::eTypeFileSpecList, false, 0,
     nullptr, {},
     "List of directories to be searched when locating debug symbol files. "
     "See also symbols.enable-external-lookup."},
    {"clang-module-search-paths", OptionValue::eTypeFileSpecList, false, 0,
     nullptr, {},
     "List of directories to be searched when locating modules for Clang."},
    {"auto-import-clang-modules", OptionValue::eTypeBoolean, false, true,
     nullptr, {},
     "Automatically load Clang modules referred to by the program."},
    {"auto-apply-fixits", OptionValue::eTypeBoolean, false, true, nullptr,
     {}, "Automatically apply fix-it hints to expressions."},
    {"notify-about-fixits", OptionValue::eTypeBoolean, false, true, nullptr,
     {}, "Print the fixed expression text."},
    {"save-jit-objects", OptionValue::eTypeBoolean, false, false, nullptr,
     {}, "Save intermediate object files generated by the LLVM JIT"},
    {"max-children-count", OptionValue::eTypeSInt64, false, 256, nullptr,
     {}, "Maximum number of children to expand in any level of depth."},
    {"max-string-summary-length", OptionValue::eTypeSInt64, false, 1024,
     nullptr, {},
     "Maximum number of characters to show when using %s in summary strings."},
    {"max-memory-read-size", OptionValue::eTypeSInt64, false, 1024, nullptr,
     {}, "Maximum number of bytes that 'memory read' will fetch before "
         "--force must be specified."},
    {"breakpoints-use-platform-avoid-list", OptionValue::eTypeBoolean, false,
     true, nullptr, {}, "Consult the platform module avoid list when "
                        "setting non-module specific breakpoints."},
    {"arg0", OptionValue::eTypeString, false, 0, nullptr, {},
     "The first argument passed to the program in the argument array which can "
     "be different from the executable itself."},
    {"run-args", OptionValue::eTypeArgs, false, 0, nullptr, {},
     "A list containing all the arguments to be passed to the executable when "
     "it is run. Note that this does NOT include the argv[0] which is in "
     "target.arg0."},
    {"env-vars", OptionValue::eTypeDictionary, false, OptionValue::eTypeString,
     nullptr, {}, "A list of all the environment variables to be passed "
                  "to the executable's environment, and their values."},
    {"inherit-env", OptionValue::eTypeBoolean, false, true, nullptr, {},
     "Inherit the environment from the process that is running LLDB."},
    {"input-path", OptionValue::eTypeFileSpec, false, 0, nullptr, {},
     "The file/path to be used by the executable program for reading its "
     "standard input."},
    {"output-path", OptionValue::eTypeFileSpec, false, 0, nullptr, {},
     "The file/path to be used by the executable program for writing its "
     "standard output."},
    {"error-path", OptionValue::eTypeFileSpec, false, 0, nullptr, {},
     "The file/path to be used by the executable program for writing its "
     "standard error."},
    {"detach-on-error", OptionValue::eTypeBoolean, false, true, nullptr,
     {}, "debugserver will detach (rather than killing) a process if it "
              "loses connection with lldb."},
    {"preload-symbols", OptionValue::eTypeBoolean, false, true, nullptr, {},
     "Enable loading of symbol tables before they are needed."},
    {"disable-aslr", OptionValue::eTypeBoolean, false, true, nullptr, {},
     "Disable Address Space Layout Randomization (ASLR)"},
    {"disable-stdio", OptionValue::eTypeBoolean, false, false, nullptr, {},
     "Disable stdin/stdout for process (e.g. for a GUI application)"},
    {"inline-breakpoint-strategy", OptionValue::eTypeEnum, false,
     eInlineBreakpointsAlways, nullptr,
     OptionEnumValues(g_inline_breakpoint_enums),
     "The strategy to use when settings breakpoints by file and line. "
     "Breakpoint locations can end up being inlined by the compiler, so that a "
     "compile unit 'a.c' might contain an inlined function from another source "
     "file. "
     "Usually this is limited to breakpoint locations from inlined functions "
     "from header or other include files, or more accurately "
     "non-implementation source files. "
     "Sometimes code might #include implementation files and cause inlined "
     "breakpoint locations in inlined implementation files. "
     "Always checking for inlined breakpoint locations can be expensive "
     "(memory and time), so if you have a project with many headers "
     "and find that setting breakpoints is slow, then you can change this "
     "setting to headers. "
     "This setting allows you to control exactly which strategy is used when "
     "setting "
     "file and line breakpoints."},
    // FIXME: This is the wrong way to do per-architecture settings, but we
    // don't have a general per architecture settings system in place yet.
    {"x86-disassembly-flavor", OptionValue::eTypeEnum, false,
     eX86DisFlavorDefault, nullptr,
     OptionEnumValues(g_x86_dis_flavor_value_types),
     "The default disassembly flavor to use for x86 or x86-64 targets."},
    {"use-hex-immediates", OptionValue::eTypeBoolean, false, true, nullptr,
     {}, "Show immediates in disassembly as hexadecimal."},
    {"hex-immediate-style", OptionValue::eTypeEnum, false,
     Disassembler::eHexStyleC, nullptr,
     OptionEnumValues(g_hex_immediate_style_values),
     "Which style to use for printing hexadecimal disassembly values."},
    {"use-fast-stepping", OptionValue::eTypeBoolean, false, true, nullptr,
     {}, "Use a fast stepping algorithm based on running from branch to "
         "branch rather than instruction single-stepping."},
    {"load-script-from-symbol-file", OptionValue::eTypeEnum, false,
     eLoadScriptFromSymFileWarn, nullptr,
     OptionEnumValues(g_load_script_from_sym_file_values),
     "Allow LLDB to load scripting resources embedded in symbol files when "
     "available."},
    {"load-cwd-lldbinit", OptionValue::eTypeEnum, false, eLoadCWDlldbinitWarn,
     nullptr, OptionEnumValues(g_load_current_working_dir_lldbinit_values),
     "Allow LLDB to .lldbinit files from the current directory automatically."},
    {"memory-module-load-level", OptionValue::eTypeEnum, false,
     eMemoryModuleLoadLevelComplete, nullptr,
     OptionEnumValues(g_memory_module_load_level_values),
     "Loading modules from memory can be slow as reading the symbol tables and "
     "other data can take a long time depending on your connection to the "
     "debug target. "
     "This setting helps users control how much information gets loaded when "
     "loading modules from memory."
     "'complete' is the default value for this setting which will load all "
     "sections and symbols by reading them from memory (slowest, most "
     "accurate). "
     "'partial' will load sections and attempt to find function bounds without "
     "downloading the symbol table (faster, still accurate, missing symbol "
     "names). "
     "'minimal' is the fastest setting and will load section data with no "
     "symbols, but should rarely be used as stack frames in these memory "
     "regions will be inaccurate and not provide any context (fastest). "},
    {"display-expression-in-crashlogs", OptionValue::eTypeBoolean, false, false,
     nullptr, {}, "Expressions that crash will show up in crash logs if "
                  "the host system supports executable specific crash log "
                  "strings and this setting is set to true."},
    {"trap-handler-names", OptionValue::eTypeArray, true,
     OptionValue::eTypeString, nullptr, {},
     "A list of trap handler function names, e.g. a common Unix user process "
     "one is _sigtramp."},
    {"display-runtime-support-values", OptionValue::eTypeBoolean, false, false,
     nullptr, {}, "If true, LLDB will show variables that are meant to "
                  "support the operation of a language's runtime support."},
    {"display-recognized-arguments", OptionValue::eTypeBoolean, false, false,
     nullptr, {}, "Show recognized arguments in variable listings by default."},
    {"non-stop-mode", OptionValue::eTypeBoolean, false, 0, nullptr, {},
     "Disable lock-step debugging, instead control threads independently."},
    {"require-hardware-breakpoint", OptionValue::eTypeBoolean, false, 0,
     nullptr, {}, "Require all breakpoints to be hardware breakpoints."}};
// clang-format on

enum {
  ePropertyDefaultArch,
  ePropertyMoveToNearestCode,
  ePropertyLanguage,
  ePropertyExprPrefix,
  ePropertyPreferDynamic,
  ePropertyEnableSynthetic,
  ePropertySkipPrologue,
  ePropertySourceMap,
  ePropertyExecutableSearchPaths,
  ePropertyDebugFileSearchPaths,
  ePropertyClangModuleSearchPaths,
  ePropertyAutoImportClangModules,
  ePropertyAutoApplyFixIts,
  ePropertyNotifyAboutFixIts,
  ePropertySaveObjects,
  ePropertyMaxChildrenCount,
  ePropertyMaxSummaryLength,
  ePropertyMaxMemReadSize,
  ePropertyBreakpointUseAvoidList,
  ePropertyArg0,
  ePropertyRunArgs,
  ePropertyEnvVars,
  ePropertyInheritEnv,
  ePropertyInputPath,
  ePropertyOutputPath,
  ePropertyErrorPath,
  ePropertyDetachOnError,
  ePropertyPreloadSymbols,
  ePropertyDisableASLR,
  ePropertyDisableSTDIO,
  ePropertyInlineStrategy,
  ePropertyDisassemblyFlavor,
  ePropertyUseHexImmediates,
  ePropertyHexImmediateStyle,
  ePropertyUseFastStepping,
  ePropertyLoadScriptFromSymbolFile,
  ePropertyLoadCWDlldbinitFile,
  ePropertyMemoryModuleLoadLevel,
  ePropertyDisplayExpressionsInCrashlogs,
  ePropertyTrapHandlerNames,
  ePropertyDisplayRuntimeSupportValues,
  ePropertyDisplayRecognizedArguments,
  ePropertyNonStopModeEnabled,
  ePropertyRequireHardwareBreakpoints,
  ePropertyExperimental,
};

class TargetOptionValueProperties : public OptionValueProperties {
public:
  TargetOptionValueProperties(const ConstString &name)
      : OptionValueProperties(name), m_target(nullptr), m_got_host_env(false) {}

  // This constructor is used when creating TargetOptionValueProperties when it
  // is part of a new lldb_private::Target instance. It will copy all current
  // global property values as needed
  TargetOptionValueProperties(Target *target,
                              const TargetPropertiesSP &target_properties_sp)
      : OptionValueProperties(*target_properties_sp->GetValueProperties()),
        m_target(target), m_got_host_env(false) {}

  const Property *GetPropertyAtIndex(const ExecutionContext *exe_ctx,
                                     bool will_modify,
                                     uint32_t idx) const override {
    // When getting the value for a key from the target options, we will always
    // try and grab the setting from the current target if there is one. Else
    // we just use the one from this instance.
    if (idx == ePropertyEnvVars)
      GetHostEnvironmentIfNeeded();

    if (exe_ctx) {
      Target *target = exe_ctx->GetTargetPtr();
      if (target) {
        TargetOptionValueProperties *target_properties =
            static_cast<TargetOptionValueProperties *>(
                target->GetValueProperties().get());
        if (this != target_properties)
          return target_properties->ProtectedGetPropertyAtIndex(idx);
      }
    }
    return ProtectedGetPropertyAtIndex(idx);
  }

  lldb::TargetSP GetTargetSP() { return m_target->shared_from_this(); }

protected:
  void GetHostEnvironmentIfNeeded() const {
    if (!m_got_host_env) {
      if (m_target) {
        m_got_host_env = true;
        const uint32_t idx = ePropertyInheritEnv;
        if (GetPropertyAtIndexAsBoolean(
                nullptr, idx, g_properties[idx].default_uint_value != 0)) {
          PlatformSP platform_sp(m_target->GetPlatform());
          if (platform_sp) {
            Environment env = platform_sp->GetEnvironment();
            OptionValueDictionary *env_dict =
                GetPropertyAtIndexAsOptionValueDictionary(nullptr,
                                                          ePropertyEnvVars);
            if (env_dict) {
              const bool can_replace = false;
              for (const auto &KV : env) {
                // Don't allow existing keys to be replaced with ones we get
                // from the platform environment
                env_dict->SetValueForKey(
                    ConstString(KV.first()),
                    OptionValueSP(new OptionValueString(KV.second.c_str())),
                    can_replace);
              }
            }
          }
        }
      }
    }
  }
  Target *m_target;
  mutable bool m_got_host_env;
};

//----------------------------------------------------------------------
// TargetProperties
//----------------------------------------------------------------------
static constexpr PropertyDefinition g_experimental_properties[]{
    {"inject-local-vars", OptionValue::eTypeBoolean, true, true, nullptr,
     {},
     "If true, inject local variables explicitly into the expression text.  "
     "This will fix symbol resolution when there are name collisions between "
     "ivars and local variables.  "
     "But it can make expressions run much more slowly."},
    {"use-modern-type-lookup", OptionValue::eTypeBoolean, true, false, nullptr,
     {}, "If true, use Clang's modern type lookup infrastructure."}};

enum { ePropertyInjectLocalVars = 0, ePropertyUseModernTypeLookup };

class TargetExperimentalOptionValueProperties : public OptionValueProperties {
public:
  TargetExperimentalOptionValueProperties()
      : OptionValueProperties(
            ConstString(Properties::GetExperimentalSettingsName())) {}
};

TargetExperimentalProperties::TargetExperimentalProperties()
    : Properties(OptionValuePropertiesSP(
          new TargetExperimentalOptionValueProperties())) {
  m_collection_sp->Initialize(g_experimental_properties);
}

//----------------------------------------------------------------------
// TargetProperties
//----------------------------------------------------------------------
TargetProperties::TargetProperties(Target *target)
    : Properties(), m_launch_info() {
  if (target) {
    m_collection_sp = std::make_shared<TargetOptionValueProperties>(
        target, Target::GetGlobalProperties());

    // Set callbacks to update launch_info whenever "settins set" updated any
    // of these properties
    m_collection_sp->SetValueChangedCallback(
        ePropertyArg0, TargetProperties::Arg0ValueChangedCallback, this);
    m_collection_sp->SetValueChangedCallback(
        ePropertyRunArgs, TargetProperties::RunArgsValueChangedCallback, this);
    m_collection_sp->SetValueChangedCallback(
        ePropertyEnvVars, TargetProperties::EnvVarsValueChangedCallback, this);
    m_collection_sp->SetValueChangedCallback(
        ePropertyInputPath, TargetProperties::InputPathValueChangedCallback,
        this);
    m_collection_sp->SetValueChangedCallback(
        ePropertyOutputPath, TargetProperties::OutputPathValueChangedCallback,
        this);
    m_collection_sp->SetValueChangedCallback(
        ePropertyErrorPath, TargetProperties::ErrorPathValueChangedCallback,
        this);
    m_collection_sp->SetValueChangedCallback(
        ePropertyDetachOnError,
        TargetProperties::DetachOnErrorValueChangedCallback, this);
    m_collection_sp->SetValueChangedCallback(
        ePropertyDisableASLR, TargetProperties::DisableASLRValueChangedCallback,
        this);
    m_collection_sp->SetValueChangedCallback(
        ePropertyDisableSTDIO,
        TargetProperties::DisableSTDIOValueChangedCallback, this);

    m_experimental_properties_up.reset(new TargetExperimentalProperties());
    m_collection_sp->AppendProperty(
        ConstString(Properties::GetExperimentalSettingsName()),
        ConstString("Experimental settings - setting these won't produce "
                    "errors if the setting is not present."),
        true, m_experimental_properties_up->GetValueProperties());

    // Update m_launch_info once it was created
    Arg0ValueChangedCallback(this, nullptr);
    RunArgsValueChangedCallback(this, nullptr);
    // EnvVarsValueChangedCallback(this, nullptr); // FIXME: cause segfault in
    // Target::GetPlatform()
    InputPathValueChangedCallback(this, nullptr);
    OutputPathValueChangedCallback(this, nullptr);
    ErrorPathValueChangedCallback(this, nullptr);
    DetachOnErrorValueChangedCallback(this, nullptr);
    DisableASLRValueChangedCallback(this, nullptr);
    DisableSTDIOValueChangedCallback(this, nullptr);
  } else {
    m_collection_sp =
        std::make_shared<TargetOptionValueProperties>(ConstString("target"));
    m_collection_sp->Initialize(g_properties);
    m_experimental_properties_up.reset(new TargetExperimentalProperties());
    m_collection_sp->AppendProperty(
        ConstString(Properties::GetExperimentalSettingsName()),
        ConstString("Experimental settings - setting these won't produce "
                    "errors if the setting is not present."),
        true, m_experimental_properties_up->GetValueProperties());
    m_collection_sp->AppendProperty(
        ConstString("process"), ConstString("Settings specific to processes."),
        true, Process::GetGlobalProperties()->GetValueProperties());
  }
}

TargetProperties::~TargetProperties() = default;

bool TargetProperties::GetInjectLocalVariables(
    ExecutionContext *exe_ctx) const {
  const Property *exp_property = m_collection_sp->GetPropertyAtIndex(
      exe_ctx, false, ePropertyExperimental);
  OptionValueProperties *exp_values =
      exp_property->GetValue()->GetAsProperties();
  if (exp_values)
    return exp_values->GetPropertyAtIndexAsBoolean(
        exe_ctx, ePropertyInjectLocalVars, true);
  else
    return true;
}

void TargetProperties::SetInjectLocalVariables(ExecutionContext *exe_ctx,
                                               bool b) {
  const Property *exp_property =
      m_collection_sp->GetPropertyAtIndex(exe_ctx, true, ePropertyExperimental);
  OptionValueProperties *exp_values =
      exp_property->GetValue()->GetAsProperties();
  if (exp_values)
    exp_values->SetPropertyAtIndexAsBoolean(exe_ctx, ePropertyInjectLocalVars,
                                            true);
}

bool TargetProperties::GetUseModernTypeLookup() const {
  const Property *exp_property = m_collection_sp->GetPropertyAtIndex(
      nullptr, false, ePropertyExperimental);
  OptionValueProperties *exp_values =
      exp_property->GetValue()->GetAsProperties();
  if (exp_values)
    return exp_values->GetPropertyAtIndexAsBoolean(
        nullptr, ePropertyUseModernTypeLookup, true);
  else
    return true;
}

ArchSpec TargetProperties::GetDefaultArchitecture() const {
  OptionValueArch *value = m_collection_sp->GetPropertyAtIndexAsOptionValueArch(
      nullptr, ePropertyDefaultArch);
  if (value)
    return value->GetCurrentValue();
  return ArchSpec();
}

void TargetProperties::SetDefaultArchitecture(const ArchSpec &arch) {
  OptionValueArch *value = m_collection_sp->GetPropertyAtIndexAsOptionValueArch(
      nullptr, ePropertyDefaultArch);
  if (value)
    return value->SetCurrentValue(arch, true);
}

bool TargetProperties::GetMoveToNearestCode() const {
  const uint32_t idx = ePropertyMoveToNearestCode;
  return m_collection_sp->GetPropertyAtIndexAsBoolean(
      nullptr, idx, g_properties[idx].default_uint_value != 0);
}

lldb::DynamicValueType TargetProperties::GetPreferDynamicValue() const {
  const uint32_t idx = ePropertyPreferDynamic;
  return (lldb::DynamicValueType)
      m_collection_sp->GetPropertyAtIndexAsEnumeration(
          nullptr, idx, g_properties[idx].default_uint_value);
}

bool TargetProperties::SetPreferDynamicValue(lldb::DynamicValueType d) {
  const uint32_t idx = ePropertyPreferDynamic;
  return m_collection_sp->SetPropertyAtIndexAsEnumeration(nullptr, idx, d);
}

bool TargetProperties::GetPreloadSymbols() const {
  const uint32_t idx = ePropertyPreloadSymbols;
  return m_collection_sp->GetPropertyAtIndexAsBoolean(
      nullptr, idx, g_properties[idx].default_uint_value != 0);
}

void TargetProperties::SetPreloadSymbols(bool b) {
  const uint32_t idx = ePropertyPreloadSymbols;
  m_collection_sp->SetPropertyAtIndexAsBoolean(nullptr, idx, b);
}

bool TargetProperties::GetDisableASLR() const {
  const uint32_t idx = ePropertyDisableASLR;
  return m_collection_sp->GetPropertyAtIndexAsBoolean(
      nullptr, idx, g_properties[idx].default_uint_value != 0);
}

void TargetProperties::SetDisableASLR(bool b) {
  const uint32_t idx = ePropertyDisableASLR;
  m_collection_sp->SetPropertyAtIndexAsBoolean(nullptr, idx, b);
}

bool TargetProperties::GetDetachOnError() const {
  const uint32_t idx = ePropertyDetachOnError;
  return m_collection_sp->GetPropertyAtIndexAsBoolean(
      nullptr, idx, g_properties[idx].default_uint_value != 0);
}

void TargetProperties::SetDetachOnError(bool b) {
  const uint32_t idx = ePropertyDetachOnError;
  m_collection_sp->SetPropertyAtIndexAsBoolean(nullptr, idx, b);
}

bool TargetProperties::GetDisableSTDIO() const {
  const uint32_t idx = ePropertyDisableSTDIO;
  return m_collection_sp->GetPropertyAtIndexAsBoolean(
      nullptr, idx, g_properties[idx].default_uint_value != 0);
}

void TargetProperties::SetDisableSTDIO(bool b) {
  const uint32_t idx = ePropertyDisableSTDIO;
  m_collection_sp->SetPropertyAtIndexAsBoolean(nullptr, idx, b);
}

const char *TargetProperties::GetDisassemblyFlavor() const {
  const uint32_t idx = ePropertyDisassemblyFlavor;
  const char *return_value;

  x86DisassemblyFlavor flavor_value =
      (x86DisassemblyFlavor)m_collection_sp->GetPropertyAtIndexAsEnumeration(
          nullptr, idx, g_properties[idx].default_uint_value);
  return_value = g_x86_dis_flavor_value_types[flavor_value].string_value;
  return return_value;
}

InlineStrategy TargetProperties::GetInlineStrategy() const {
  const uint32_t idx = ePropertyInlineStrategy;
  return (InlineStrategy)m_collection_sp->GetPropertyAtIndexAsEnumeration(
      nullptr, idx, g_properties[idx].default_uint_value);
}

llvm::StringRef TargetProperties::GetArg0() const {
  const uint32_t idx = ePropertyArg0;
  return m_collection_sp->GetPropertyAtIndexAsString(nullptr, idx, llvm::StringRef());
}

void TargetProperties::SetArg0(llvm::StringRef arg) {
  const uint32_t idx = ePropertyArg0;
  m_collection_sp->SetPropertyAtIndexAsString(
      nullptr, idx, arg);
  m_launch_info.SetArg0(arg);
}

bool TargetProperties::GetRunArguments(Args &args) const {
  const uint32_t idx = ePropertyRunArgs;
  return m_collection_sp->GetPropertyAtIndexAsArgs(nullptr, idx, args);
}

void TargetProperties::SetRunArguments(const Args &args) {
  const uint32_t idx = ePropertyRunArgs;
  m_collection_sp->SetPropertyAtIndexFromArgs(nullptr, idx, args);
  m_launch_info.GetArguments() = args;
}

Environment TargetProperties::GetEnvironment() const {
  // TODO: Get rid of the Args intermediate step
  Args env;
  const uint32_t idx = ePropertyEnvVars;
  m_collection_sp->GetPropertyAtIndexAsArgs(nullptr, idx, env);
  return Environment(env);
}

void TargetProperties::SetEnvironment(Environment env) {
  // TODO: Get rid of the Args intermediate step
  const uint32_t idx = ePropertyEnvVars;
  m_collection_sp->SetPropertyAtIndexFromArgs(nullptr, idx, Args(env));
  m_launch_info.GetEnvironment() = std::move(env);
}

bool TargetProperties::GetSkipPrologue() const {
  const uint32_t idx = ePropertySkipPrologue;
  return m_collection_sp->GetPropertyAtIndexAsBoolean(
      nullptr, idx, g_properties[idx].default_uint_value != 0);
}

PathMappingList &TargetProperties::GetSourcePathMap() const {
  const uint32_t idx = ePropertySourceMap;
  OptionValuePathMappings *option_value =
      m_collection_sp->GetPropertyAtIndexAsOptionValuePathMappings(nullptr,
                                                                   false, idx);
  assert(option_value);
  return option_value->GetCurrentValue();
}

FileSpecList &TargetProperties::GetExecutableSearchPaths() {
  const uint32_t idx = ePropertyExecutableSearchPaths;
  OptionValueFileSpecList *option_value =
      m_collection_sp->GetPropertyAtIndexAsOptionValueFileSpecList(nullptr,
                                                                   false, idx);
  assert(option_value);
  return option_value->GetCurrentValue();
}

FileSpecList &TargetProperties::GetDebugFileSearchPaths() {
  const uint32_t idx = ePropertyDebugFileSearchPaths;
  OptionValueFileSpecList *option_value =
      m_collection_sp->GetPropertyAtIndexAsOptionValueFileSpecList(nullptr,
                                                                   false, idx);
  assert(option_value);
  return option_value->GetCurrentValue();
}

FileSpecList &TargetProperties::GetClangModuleSearchPaths() {
  const uint32_t idx = ePropertyClangModuleSearchPaths;
  OptionValueFileSpecList *option_value =
      m_collection_sp->GetPropertyAtIndexAsOptionValueFileSpecList(nullptr,
                                                                   false, idx);
  assert(option_value);
  return option_value->GetCurrentValue();
}

bool TargetProperties::GetEnableAutoImportClangModules() const {
  const uint32_t idx = ePropertyAutoImportClangModules;
  return m_collection_sp->GetPropertyAtIndexAsBoolean(
      nullptr, idx, g_properties[idx].default_uint_value != 0);
}

bool TargetProperties::GetEnableAutoApplyFixIts() const {
  const uint32_t idx = ePropertyAutoApplyFixIts;
  return m_collection_sp->GetPropertyAtIndexAsBoolean(
      nullptr, idx, g_properties[idx].default_uint_value != 0);
}

bool TargetProperties::GetEnableNotifyAboutFixIts() const {
  const uint32_t idx = ePropertyNotifyAboutFixIts;
  return m_collection_sp->GetPropertyAtIndexAsBoolean(
      nullptr, idx, g_properties[idx].default_uint_value != 0);
}

bool TargetProperties::GetEnableSaveObjects() const {
  const uint32_t idx = ePropertySaveObjects;
  return m_collection_sp->GetPropertyAtIndexAsBoolean(
      nullptr, idx, g_properties[idx].default_uint_value != 0);
}

bool TargetProperties::GetEnableSyntheticValue() const {
  const uint32_t idx = ePropertyEnableSynthetic;
  return m_collection_sp->GetPropertyAtIndexAsBoolean(
      nullptr, idx, g_properties[idx].default_uint_value != 0);
}

uint32_t TargetProperties::GetMaximumNumberOfChildrenToDisplay() const {
  const uint32_t idx = ePropertyMaxChildrenCount;
  return m_collection_sp->GetPropertyAtIndexAsSInt64(
      nullptr, idx, g_properties[idx].default_uint_value);
}

uint32_t TargetProperties::GetMaximumSizeOfStringSummary() const {
  const uint32_t idx = ePropertyMaxSummaryLength;
  return m_collection_sp->GetPropertyAtIndexAsSInt64(
      nullptr, idx, g_properties[idx].default_uint_value);
}

uint32_t TargetProperties::GetMaximumMemReadSize() const {
  const uint32_t idx = ePropertyMaxMemReadSize;
  return m_collection_sp->GetPropertyAtIndexAsSInt64(
      nullptr, idx, g_properties[idx].default_uint_value);
}

FileSpec TargetProperties::GetStandardInputPath() const {
  const uint32_t idx = ePropertyInputPath;
  return m_collection_sp->GetPropertyAtIndexAsFileSpec(nullptr, idx);
}

void TargetProperties::SetStandardInputPath(llvm::StringRef path) {
  const uint32_t idx = ePropertyInputPath;
  m_collection_sp->SetPropertyAtIndexAsString(nullptr, idx, path);
}

FileSpec TargetProperties::GetStandardOutputPath() const {
  const uint32_t idx = ePropertyOutputPath;
  return m_collection_sp->GetPropertyAtIndexAsFileSpec(nullptr, idx);
}

void TargetProperties::SetStandardOutputPath(llvm::StringRef path) {
  const uint32_t idx = ePropertyOutputPath;
  m_collection_sp->SetPropertyAtIndexAsString(nullptr, idx, path);
}

FileSpec TargetProperties::GetStandardErrorPath() const {
  const uint32_t idx = ePropertyErrorPath;
  return m_collection_sp->GetPropertyAtIndexAsFileSpec(nullptr, idx);
}

void TargetProperties::SetStandardErrorPath(llvm::StringRef path) {
  const uint32_t idx = ePropertyErrorPath;
  m_collection_sp->SetPropertyAtIndexAsString(nullptr, idx, path);
}

LanguageType TargetProperties::GetLanguage() const {
  OptionValueLanguage *value =
      m_collection_sp->GetPropertyAtIndexAsOptionValueLanguage(
          nullptr, ePropertyLanguage);
  if (value)
    return value->GetCurrentValue();
  return LanguageType();
}

llvm::StringRef TargetProperties::GetExpressionPrefixContents() {
  const uint32_t idx = ePropertyExprPrefix;
  OptionValueFileSpec *file =
      m_collection_sp->GetPropertyAtIndexAsOptionValueFileSpec(nullptr, false,
                                                               idx);
  if (file) {
    DataBufferSP data_sp(file->GetFileContents());
    if (data_sp)
      return llvm::StringRef(
          reinterpret_cast<const char *>(data_sp->GetBytes()),
          data_sp->GetByteSize());
  }
  return "";
}

bool TargetProperties::GetBreakpointsConsultPlatformAvoidList() {
  const uint32_t idx = ePropertyBreakpointUseAvoidList;
  return m_collection_sp->GetPropertyAtIndexAsBoolean(
      nullptr, idx, g_properties[idx].default_uint_value != 0);
}

bool TargetProperties::GetUseHexImmediates() const {
  const uint32_t idx = ePropertyUseHexImmediates;
  return m_collection_sp->GetPropertyAtIndexAsBoolean(
      nullptr, idx, g_properties[idx].default_uint_value != 0);
}

bool TargetProperties::GetUseFastStepping() const {
  const uint32_t idx = ePropertyUseFastStepping;
  return m_collection_sp->GetPropertyAtIndexAsBoolean(
      nullptr, idx, g_properties[idx].default_uint_value != 0);
}

bool TargetProperties::GetDisplayExpressionsInCrashlogs() const {
  const uint32_t idx = ePropertyDisplayExpressionsInCrashlogs;
  return m_collection_sp->GetPropertyAtIndexAsBoolean(
      nullptr, idx, g_properties[idx].default_uint_value != 0);
}

LoadScriptFromSymFile TargetProperties::GetLoadScriptFromSymbolFile() const {
  const uint32_t idx = ePropertyLoadScriptFromSymbolFile;
  return (LoadScriptFromSymFile)
      m_collection_sp->GetPropertyAtIndexAsEnumeration(
          nullptr, idx, g_properties[idx].default_uint_value);
}

LoadCWDlldbinitFile TargetProperties::GetLoadCWDlldbinitFile() const {
  const uint32_t idx = ePropertyLoadCWDlldbinitFile;
  return (LoadCWDlldbinitFile)m_collection_sp->GetPropertyAtIndexAsEnumeration(
      nullptr, idx, g_properties[idx].default_uint_value);
}

Disassembler::HexImmediateStyle TargetProperties::GetHexImmediateStyle() const {
  const uint32_t idx = ePropertyHexImmediateStyle;
  return (Disassembler::HexImmediateStyle)
      m_collection_sp->GetPropertyAtIndexAsEnumeration(
          nullptr, idx, g_properties[idx].default_uint_value);
}

MemoryModuleLoadLevel TargetProperties::GetMemoryModuleLoadLevel() const {
  const uint32_t idx = ePropertyMemoryModuleLoadLevel;
  return (MemoryModuleLoadLevel)
      m_collection_sp->GetPropertyAtIndexAsEnumeration(
          nullptr, idx, g_properties[idx].default_uint_value);
}

bool TargetProperties::GetUserSpecifiedTrapHandlerNames(Args &args) const {
  const uint32_t idx = ePropertyTrapHandlerNames;
  return m_collection_sp->GetPropertyAtIndexAsArgs(nullptr, idx, args);
}

void TargetProperties::SetUserSpecifiedTrapHandlerNames(const Args &args) {
  const uint32_t idx = ePropertyTrapHandlerNames;
  m_collection_sp->SetPropertyAtIndexFromArgs(nullptr, idx, args);
}

bool TargetProperties::GetDisplayRuntimeSupportValues() const {
  const uint32_t idx = ePropertyDisplayRuntimeSupportValues;
  return m_collection_sp->GetPropertyAtIndexAsBoolean(nullptr, idx, false);
}

void TargetProperties::SetDisplayRuntimeSupportValues(bool b) {
  const uint32_t idx = ePropertyDisplayRuntimeSupportValues;
  m_collection_sp->SetPropertyAtIndexAsBoolean(nullptr, idx, b);
}

bool TargetProperties::GetDisplayRecognizedArguments() const {
  const uint32_t idx = ePropertyDisplayRecognizedArguments;
  return m_collection_sp->GetPropertyAtIndexAsBoolean(nullptr, idx, false);
}

void TargetProperties::SetDisplayRecognizedArguments(bool b) {
  const uint32_t idx = ePropertyDisplayRecognizedArguments;
  m_collection_sp->SetPropertyAtIndexAsBoolean(nullptr, idx, b);
}

bool TargetProperties::GetNonStopModeEnabled() const {
  const uint32_t idx = ePropertyNonStopModeEnabled;
  return m_collection_sp->GetPropertyAtIndexAsBoolean(nullptr, idx, false);
}

void TargetProperties::SetNonStopModeEnabled(bool b) {
  const uint32_t idx = ePropertyNonStopModeEnabled;
  m_collection_sp->SetPropertyAtIndexAsBoolean(nullptr, idx, b);
}

const ProcessLaunchInfo &TargetProperties::GetProcessLaunchInfo() {
  m_launch_info.SetArg0(GetArg0()); // FIXME: Arg0 callback doesn't work
  return m_launch_info;
}

void TargetProperties::SetProcessLaunchInfo(
    const ProcessLaunchInfo &launch_info) {
  m_launch_info = launch_info;
  SetArg0(launch_info.GetArg0());
  SetRunArguments(launch_info.GetArguments());
  SetEnvironment(launch_info.GetEnvironment());
  const FileAction *input_file_action =
      launch_info.GetFileActionForFD(STDIN_FILENO);
  if (input_file_action) {
    SetStandardInputPath(input_file_action->GetPath());
  }
  const FileAction *output_file_action =
      launch_info.GetFileActionForFD(STDOUT_FILENO);
  if (output_file_action) {
    SetStandardOutputPath(output_file_action->GetPath());
  }
  const FileAction *error_file_action =
      launch_info.GetFileActionForFD(STDERR_FILENO);
  if (error_file_action) {
    SetStandardErrorPath(error_file_action->GetPath());
  }
  SetDetachOnError(launch_info.GetFlags().Test(lldb::eLaunchFlagDetachOnError));
  SetDisableASLR(launch_info.GetFlags().Test(lldb::eLaunchFlagDisableASLR));
  SetDisableSTDIO(launch_info.GetFlags().Test(lldb::eLaunchFlagDisableSTDIO));
}

bool TargetProperties::GetRequireHardwareBreakpoints() const {
  const uint32_t idx = ePropertyRequireHardwareBreakpoints;
  return m_collection_sp->GetPropertyAtIndexAsBoolean(
      nullptr, idx, g_properties[idx].default_uint_value != 0);
}

void TargetProperties::SetRequireHardwareBreakpoints(bool b) {
  const uint32_t idx = ePropertyRequireHardwareBreakpoints;
  m_collection_sp->SetPropertyAtIndexAsBoolean(nullptr, idx, b);
}

void TargetProperties::Arg0ValueChangedCallback(void *target_property_ptr,
                                                OptionValue *) {
  TargetProperties *this_ =
      reinterpret_cast<TargetProperties *>(target_property_ptr);
  this_->m_launch_info.SetArg0(this_->GetArg0());
}

void TargetProperties::RunArgsValueChangedCallback(void *target_property_ptr,
                                                   OptionValue *) {
  TargetProperties *this_ =
      reinterpret_cast<TargetProperties *>(target_property_ptr);
  Args args;
  if (this_->GetRunArguments(args))
    this_->m_launch_info.GetArguments() = args;
}

void TargetProperties::EnvVarsValueChangedCallback(void *target_property_ptr,
                                                   OptionValue *) {
  TargetProperties *this_ =
      reinterpret_cast<TargetProperties *>(target_property_ptr);
  this_->m_launch_info.GetEnvironment() = this_->GetEnvironment();
}

void TargetProperties::InputPathValueChangedCallback(void *target_property_ptr,
                                                     OptionValue *) {
  TargetProperties *this_ =
      reinterpret_cast<TargetProperties *>(target_property_ptr);
  this_->m_launch_info.AppendOpenFileAction(
      STDIN_FILENO, this_->GetStandardInputPath(), true, false);
}

void TargetProperties::OutputPathValueChangedCallback(void *target_property_ptr,
                                                      OptionValue *) {
  TargetProperties *this_ =
      reinterpret_cast<TargetProperties *>(target_property_ptr);
  this_->m_launch_info.AppendOpenFileAction(
      STDOUT_FILENO, this_->GetStandardOutputPath(), false, true);
}

void TargetProperties::ErrorPathValueChangedCallback(void *target_property_ptr,
                                                     OptionValue *) {
  TargetProperties *this_ =
      reinterpret_cast<TargetProperties *>(target_property_ptr);
  this_->m_launch_info.AppendOpenFileAction(
      STDERR_FILENO, this_->GetStandardErrorPath(), false, true);
}

void TargetProperties::DetachOnErrorValueChangedCallback(
    void *target_property_ptr, OptionValue *) {
  TargetProperties *this_ =
      reinterpret_cast<TargetProperties *>(target_property_ptr);
  if (this_->GetDetachOnError())
    this_->m_launch_info.GetFlags().Set(lldb::eLaunchFlagDetachOnError);
  else
    this_->m_launch_info.GetFlags().Clear(lldb::eLaunchFlagDetachOnError);
}

void TargetProperties::DisableASLRValueChangedCallback(
    void *target_property_ptr, OptionValue *) {
  TargetProperties *this_ =
      reinterpret_cast<TargetProperties *>(target_property_ptr);
  if (this_->GetDisableASLR())
    this_->m_launch_info.GetFlags().Set(lldb::eLaunchFlagDisableASLR);
  else
    this_->m_launch_info.GetFlags().Clear(lldb::eLaunchFlagDisableASLR);
}

void TargetProperties::DisableSTDIOValueChangedCallback(
    void *target_property_ptr, OptionValue *) {
  TargetProperties *this_ =
      reinterpret_cast<TargetProperties *>(target_property_ptr);
  if (this_->GetDisableSTDIO())
    this_->m_launch_info.GetFlags().Set(lldb::eLaunchFlagDisableSTDIO);
  else
    this_->m_launch_info.GetFlags().Clear(lldb::eLaunchFlagDisableSTDIO);
}

//----------------------------------------------------------------------
// Target::TargetEventData
//----------------------------------------------------------------------

Target::TargetEventData::TargetEventData(const lldb::TargetSP &target_sp)
    : EventData(), m_target_sp(target_sp), m_module_list() {}

Target::TargetEventData::TargetEventData(const lldb::TargetSP &target_sp,
                                         const ModuleList &module_list)
    : EventData(), m_target_sp(target_sp), m_module_list(module_list) {}

Target::TargetEventData::~TargetEventData() = default;

const ConstString &Target::TargetEventData::GetFlavorString() {
  static ConstString g_flavor("Target::TargetEventData");
  return g_flavor;
}

void Target::TargetEventData::Dump(Stream *s) const {
  for (size_t i = 0; i < m_module_list.GetSize(); ++i) {
    if (i != 0)
      *s << ", ";
    m_module_list.GetModuleAtIndex(i)->GetDescription(
        s, lldb::eDescriptionLevelBrief);
  }
}

const Target::TargetEventData *
Target::TargetEventData::GetEventDataFromEvent(const Event *event_ptr) {
  if (event_ptr) {
    const EventData *event_data = event_ptr->GetData();
    if (event_data &&
        event_data->GetFlavor() == TargetEventData::GetFlavorString())
      return static_cast<const TargetEventData *>(event_ptr->GetData());
  }
  return nullptr;
}

TargetSP Target::TargetEventData::GetTargetFromEvent(const Event *event_ptr) {
  TargetSP target_sp;
  const TargetEventData *event_data = GetEventDataFromEvent(event_ptr);
  if (event_data)
    target_sp = event_data->m_target_sp;
  return target_sp;
}

ModuleList
Target::TargetEventData::GetModuleListFromEvent(const Event *event_ptr) {
  ModuleList module_list;
  const TargetEventData *event_data = GetEventDataFromEvent(event_ptr);
  if (event_data)
    module_list = event_data->m_module_list;
  return module_list;
}