FormatManager.cpp

Go to the documentation of this file.

//===-- FormatManager.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/DataFormatters/FormatManager.h"

#include "llvm/ADT/STLExtras.h"


#include "lldb/Core/Debugger.h"
#include "lldb/DataFormatters/FormattersHelpers.h"
#include "lldb/DataFormatters/LanguageCategory.h"
#include "lldb/Target/ExecutionContext.h"
#include "lldb/Target/Language.h"
#include "lldb/Utility/Log.h"

using namespace lldb;
using namespace lldb_private;
using namespace lldb_private::formatters;

struct FormatInfo {
  Format format;
  const char format_char;  // One or more format characters that can be used for
                           // this format.
  const char *format_name; // Long format name that can be used to specify the
                           // current format
};

static FormatInfo g_format_infos[] = {
    {eFormatDefault, '\0', "default"},
    {eFormatBoolean, 'B', "boolean"},
    {eFormatBinary, 'b', "binary"},
    {eFormatBytes, 'y', "bytes"},
    {eFormatBytesWithASCII, 'Y', "bytes with ASCII"},
    {eFormatChar, 'c', "character"},
    {eFormatCharPrintable, 'C', "printable character"},
    {eFormatComplexFloat, 'F', "complex float"},
    {eFormatCString, 's', "c-string"},
    {eFormatDecimal, 'd', "decimal"},
    {eFormatEnum, 'E', "enumeration"},
    {eFormatHex, 'x', "hex"},
    {eFormatHexUppercase, 'X', "uppercase hex"},
    {eFormatFloat, 'f', "float"},
    {eFormatOctal, 'o', "octal"},
    {eFormatOSType, 'O', "OSType"},
    {eFormatUnicode16, 'U', "unicode16"},
    {eFormatUnicode32, '\0', "unicode32"},
    {eFormatUnsigned, 'u', "unsigned decimal"},
    {eFormatPointer, 'p', "pointer"},
    {eFormatVectorOfChar, '\0', "char[]"},
    {eFormatVectorOfSInt8, '\0', "int8_t[]"},
    {eFormatVectorOfUInt8, '\0', "uint8_t[]"},
    {eFormatVectorOfSInt16, '\0', "int16_t[]"},
    {eFormatVectorOfUInt16, '\0', "uint16_t[]"},
    {eFormatVectorOfSInt32, '\0', "int32_t[]"},
    {eFormatVectorOfUInt32, '\0', "uint32_t[]"},
    {eFormatVectorOfSInt64, '\0', "int64_t[]"},
    {eFormatVectorOfUInt64, '\0', "uint64_t[]"},
    {eFormatVectorOfFloat16, '\0', "float16[]"},
    {eFormatVectorOfFloat32, '\0', "float32[]"},
    {eFormatVectorOfFloat64, '\0', "float64[]"},
    {eFormatVectorOfUInt128, '\0', "uint128_t[]"},
    {eFormatComplexInteger, 'I', "complex integer"},
    {eFormatCharArray, 'a', "character array"},
    {eFormatAddressInfo, 'A', "address"},
    {eFormatHexFloat, '\0', "hex float"},
    {eFormatInstruction, 'i', "instruction"},
    {eFormatVoid, 'v', "void"}};

static uint32_t g_num_format_infos = llvm::array_lengthof(g_format_infos);

static bool GetFormatFromFormatChar(char format_char, Format &format) {
  for (uint32_t i = 0; i < g_num_format_infos; ++i) {
    if (g_format_infos[i].format_char == format_char) {
      format = g_format_infos[i].format;
      return true;
    }
  }
  format = eFormatInvalid;
  return false;
}

static bool GetFormatFromFormatName(const char *format_name,
                                    bool partial_match_ok, Format &format) {
  uint32_t i;
  for (i = 0; i < g_num_format_infos; ++i) {
    if (strcasecmp(g_format_infos[i].format_name, format_name) == 0) {
      format = g_format_infos[i].format;
      return true;
    }
  }

  if (partial_match_ok) {
    for (i = 0; i < g_num_format_infos; ++i) {
      if (strcasestr(g_format_infos[i].format_name, format_name) ==
          g_format_infos[i].format_name) {
        format = g_format_infos[i].format;
        return true;
      }
    }
  }
  format = eFormatInvalid;
  return false;
}

void FormatManager::Changed() {
  ++m_last_revision;
  m_format_cache.Clear();
  std::lock_guard<std::recursive_mutex> guard(m_language_categories_mutex);
  for (auto &iter : m_language_categories_map) {
    if (iter.second)
      iter.second->GetFormatCache().Clear();
  }
}

bool FormatManager::GetFormatFromCString(const char *format_cstr,
                                         bool partial_match_ok,
                                         lldb::Format &format) {
  bool success = false;
  if (format_cstr && format_cstr[0]) {
    if (format_cstr[1] == '\0') {
      success = GetFormatFromFormatChar(format_cstr[0], format);
      if (success)
        return true;
    }

    success = GetFormatFromFormatName(format_cstr, partial_match_ok, format);
  }
  if (!success)
    format = eFormatInvalid;
  return success;
}

char FormatManager::GetFormatAsFormatChar(lldb::Format format) {
  for (uint32_t i = 0; i < g_num_format_infos; ++i) {
    if (g_format_infos[i].format == format)
      return g_format_infos[i].format_char;
  }
  return '\0';
}

const char *FormatManager::GetFormatAsCString(Format format) {
  if (format >= eFormatDefault && format < kNumFormats)
    return g_format_infos[format].format_name;
  return NULL;
}

void FormatManager::EnableAllCategories() {
  m_categories_map.EnableAllCategories();
  std::lock_guard<std::recursive_mutex> guard(m_language_categories_mutex);
  for (auto &iter : m_language_categories_map) {
    if (iter.second)
      iter.second->Enable();
  }
}

void FormatManager::DisableAllCategories() {
  m_categories_map.DisableAllCategories();
  std::lock_guard<std::recursive_mutex> guard(m_language_categories_mutex);
  for (auto &iter : m_language_categories_map) {
    if (iter.second)
      iter.second->Disable();
  }
}

void FormatManager::GetPossibleMatches(
    ValueObject &valobj, CompilerType compiler_type, uint32_t reason,
    lldb::DynamicValueType use_dynamic, FormattersMatchVector &entries,
    bool did_strip_ptr, bool did_strip_ref, bool did_strip_typedef,
    bool root_level) {
  compiler_type = compiler_type.GetTypeForFormatters();
  ConstString type_name(compiler_type.GetConstTypeName());
  if (valobj.GetBitfieldBitSize() > 0) {
    StreamString sstring;
    sstring.Printf("%s:%d", type_name.AsCString(), valobj.GetBitfieldBitSize());
    ConstString bitfieldname(sstring.GetString());
    entries.push_back(
        {bitfieldname, 0, did_strip_ptr, did_strip_ref, did_strip_typedef});
    reason |= lldb_private::eFormatterChoiceCriterionStrippedBitField;
  }

  if (!compiler_type.IsMeaninglessWithoutDynamicResolution()) {
    entries.push_back(
        {type_name, reason, did_strip_ptr, did_strip_ref, did_strip_typedef});

    ConstString display_type_name(compiler_type.GetDisplayTypeName());
    if (display_type_name != type_name)
      entries.push_back({display_type_name, reason, did_strip_ptr,
                         did_strip_ref, did_strip_typedef});
  }

  for (bool is_rvalue_ref = true, j = true;
       j && compiler_type.IsReferenceType(nullptr, &is_rvalue_ref); j = false) {
    CompilerType non_ref_type = compiler_type.GetNonReferenceType();
    GetPossibleMatches(
        valobj, non_ref_type,
        reason |
            lldb_private::eFormatterChoiceCriterionStrippedPointerReference,
        use_dynamic, entries, did_strip_ptr, true, did_strip_typedef);
    if (non_ref_type.IsTypedefType()) {
      CompilerType deffed_referenced_type = non_ref_type.GetTypedefedType();
      deffed_referenced_type =
          is_rvalue_ref ? deffed_referenced_type.GetRValueReferenceType()
                        : deffed_referenced_type.GetLValueReferenceType();
      GetPossibleMatches(
          valobj, deffed_referenced_type,
          reason | lldb_private::eFormatterChoiceCriterionNavigatedTypedefs,
          use_dynamic, entries, did_strip_ptr, did_strip_ref,
          true); // this is not exactly the usual meaning of stripping typedefs
    }
  }

  if (compiler_type.IsPointerType()) {
    CompilerType non_ptr_type = compiler_type.GetPointeeType();
    GetPossibleMatches(
        valobj, non_ptr_type,
        reason |
            lldb_private::eFormatterChoiceCriterionStrippedPointerReference,
        use_dynamic, entries, true, did_strip_ref, did_strip_typedef);
    if (non_ptr_type.IsTypedefType()) {
      CompilerType deffed_pointed_type =
          non_ptr_type.GetTypedefedType().GetPointerType();
      GetPossibleMatches(
          valobj, deffed_pointed_type,
          reason | lldb_private::eFormatterChoiceCriterionNavigatedTypedefs,
          use_dynamic, entries, did_strip_ptr, did_strip_ref,
          true); // this is not exactly the usual meaning of stripping typedefs
    }
  }

  for (lldb::LanguageType language_type : GetCandidateLanguages(valobj)) {
    if (Language *language = Language::FindPlugin(language_type)) {
      for (ConstString candidate :
           language->GetPossibleFormattersMatches(valobj, use_dynamic)) {
        entries.push_back(
            {candidate,
             reason | lldb_private::eFormatterChoiceCriterionLanguagePlugin,
             did_strip_ptr, did_strip_ref, did_strip_typedef});
      }
    }
  }

  // try to strip typedef chains
  if (compiler_type.IsTypedefType()) {
    CompilerType deffed_type = compiler_type.GetTypedefedType();
    GetPossibleMatches(
        valobj, deffed_type,
        reason | lldb_private::eFormatterChoiceCriterionNavigatedTypedefs,
        use_dynamic, entries, did_strip_ptr, did_strip_ref, true);
  }

  if (root_level) {
    do {
      if (!compiler_type.IsValid())
        break;

      CompilerType unqual_compiler_ast_type =
          compiler_type.GetFullyUnqualifiedType();
      if (!unqual_compiler_ast_type.IsValid())
        break;
      if (unqual_compiler_ast_type.GetOpaqueQualType() !=
          compiler_type.GetOpaqueQualType())
        GetPossibleMatches(valobj, unqual_compiler_ast_type, reason,
                           use_dynamic, entries, did_strip_ptr, did_strip_ref,
                           did_strip_typedef);
    } while (false);

    // if all else fails, go to static type
    if (valobj.IsDynamic()) {
      lldb::ValueObjectSP static_value_sp(valobj.GetStaticValue());
      if (static_value_sp)
        GetPossibleMatches(
            *static_value_sp.get(), static_value_sp->GetCompilerType(),
            reason | lldb_private::eFormatterChoiceCriterionWentToStaticValue,
            use_dynamic, entries, did_strip_ptr, did_strip_ref,
            did_strip_typedef, true);
    }
  }
}

lldb::TypeFormatImplSP
FormatManager::GetFormatForType(lldb::TypeNameSpecifierImplSP type_sp) {
  if (!type_sp)
    return lldb::TypeFormatImplSP();
  lldb::TypeFormatImplSP format_chosen_sp;
  uint32_t num_categories = m_categories_map.GetCount();
  lldb::TypeCategoryImplSP category_sp;
  uint32_t prio_category = UINT32_MAX;
  for (uint32_t category_id = 0; category_id < num_categories; category_id++) {
    category_sp = GetCategoryAtIndex(category_id);
    if (!category_sp->IsEnabled())
      continue;
    lldb::TypeFormatImplSP format_current_sp =
        category_sp->GetFormatForType(type_sp);
    if (format_current_sp &&
        (format_chosen_sp.get() == NULL ||
         (prio_category > category_sp->GetEnabledPosition()))) {
      prio_category = category_sp->GetEnabledPosition();
      format_chosen_sp = format_current_sp;
    }
  }
  return format_chosen_sp;
}

lldb::TypeSummaryImplSP
FormatManager::GetSummaryForType(lldb::TypeNameSpecifierImplSP type_sp) {
  if (!type_sp)
    return lldb::TypeSummaryImplSP();
  lldb::TypeSummaryImplSP summary_chosen_sp;
  uint32_t num_categories = m_categories_map.GetCount();
  lldb::TypeCategoryImplSP category_sp;
  uint32_t prio_category = UINT32_MAX;
  for (uint32_t category_id = 0; category_id < num_categories; category_id++) {
    category_sp = GetCategoryAtIndex(category_id);
    if (!category_sp->IsEnabled())
      continue;
    lldb::TypeSummaryImplSP summary_current_sp =
        category_sp->GetSummaryForType(type_sp);
    if (summary_current_sp &&
        (summary_chosen_sp.get() == NULL ||
         (prio_category > category_sp->GetEnabledPosition()))) {
      prio_category = category_sp->GetEnabledPosition();
      summary_chosen_sp = summary_current_sp;
    }
  }
  return summary_chosen_sp;
}

lldb::TypeFilterImplSP
FormatManager::GetFilterForType(lldb::TypeNameSpecifierImplSP type_sp) {
  if (!type_sp)
    return lldb::TypeFilterImplSP();
  lldb::TypeFilterImplSP filter_chosen_sp;
  uint32_t num_categories = m_categories_map.GetCount();
  lldb::TypeCategoryImplSP category_sp;
  uint32_t prio_category = UINT32_MAX;
  for (uint32_t category_id = 0; category_id < num_categories; category_id++) {
    category_sp = GetCategoryAtIndex(category_id);
    if (!category_sp->IsEnabled())
      continue;
    lldb::TypeFilterImplSP filter_current_sp(
        (TypeFilterImpl *)category_sp->GetFilterForType(type_sp).get());
    if (filter_current_sp &&
        (filter_chosen_sp.get() == NULL ||
         (prio_category > category_sp->GetEnabledPosition()))) {
      prio_category = category_sp->GetEnabledPosition();
      filter_chosen_sp = filter_current_sp;
    }
  }
  return filter_chosen_sp;
}

lldb::ScriptedSyntheticChildrenSP
FormatManager::GetSyntheticForType(lldb::TypeNameSpecifierImplSP type_sp) {
  if (!type_sp)
    return lldb::ScriptedSyntheticChildrenSP();
  lldb::ScriptedSyntheticChildrenSP synth_chosen_sp;
  uint32_t num_categories = m_categories_map.GetCount();
  lldb::TypeCategoryImplSP category_sp;
  uint32_t prio_category = UINT32_MAX;
  for (uint32_t category_id = 0; category_id < num_categories; category_id++) {
    category_sp = GetCategoryAtIndex(category_id);
    if (!category_sp->IsEnabled())
      continue;
    lldb::ScriptedSyntheticChildrenSP synth_current_sp(
        (ScriptedSyntheticChildren *)category_sp->GetSyntheticForType(type_sp)
            .get());
    if (synth_current_sp &&
        (synth_chosen_sp.get() == NULL ||
         (prio_category > category_sp->GetEnabledPosition()))) {
      prio_category = category_sp->GetEnabledPosition();
      synth_chosen_sp = synth_current_sp;
    }
  }
  return synth_chosen_sp;
}

lldb::TypeValidatorImplSP
FormatManager::GetValidatorForType(lldb::TypeNameSpecifierImplSP type_sp) {
  if (!type_sp)
    return lldb::TypeValidatorImplSP();
  lldb::TypeValidatorImplSP validator_chosen_sp;
  uint32_t num_categories = m_categories_map.GetCount();
  lldb::TypeCategoryImplSP category_sp;
  uint32_t prio_category = UINT32_MAX;
  for (uint32_t category_id = 0; category_id < num_categories; category_id++) {
    category_sp = GetCategoryAtIndex(category_id);
    if (!category_sp->IsEnabled())
      continue;
    lldb::TypeValidatorImplSP validator_current_sp(
        category_sp->GetValidatorForType(type_sp).get());
    if (validator_current_sp &&
        (validator_chosen_sp.get() == NULL ||
         (prio_category > category_sp->GetEnabledPosition()))) {
      prio_category = category_sp->GetEnabledPosition();
      validator_chosen_sp = validator_current_sp;
    }
  }
  return validator_chosen_sp;
}

void FormatManager::ForEachCategory(TypeCategoryMap::ForEachCallback callback) {
  m_categories_map.ForEach(callback);
  std::lock_guard<std::recursive_mutex> guard(m_language_categories_mutex);
  for (const auto &entry : m_language_categories_map) {
    if (auto category_sp = entry.second->GetCategory()) {
      if (!callback(category_sp))
        break;
    }
  }
}

lldb::TypeCategoryImplSP
FormatManager::GetCategory(ConstString category_name, bool can_create) {
  if (!category_name)
    return GetCategory(m_default_category_name);
  lldb::TypeCategoryImplSP category;
  if (m_categories_map.Get(category_name, category))
    return category;

  if (!can_create)
    return lldb::TypeCategoryImplSP();

  m_categories_map.Add(
      category_name,
      lldb::TypeCategoryImplSP(new TypeCategoryImpl(this, category_name)));
  return GetCategory(category_name);
}

lldb::Format FormatManager::GetSingleItemFormat(lldb::Format vector_format) {
  switch (vector_format) {
  case eFormatVectorOfChar:
    return eFormatCharArray;

  case eFormatVectorOfSInt8:
  case eFormatVectorOfSInt16:
  case eFormatVectorOfSInt32:
  case eFormatVectorOfSInt64:
    return eFormatDecimal;

  case eFormatVectorOfUInt8:
  case eFormatVectorOfUInt16:
  case eFormatVectorOfUInt32:
  case eFormatVectorOfUInt64:
  case eFormatVectorOfUInt128:
    return eFormatHex;

  case eFormatVectorOfFloat16:
  case eFormatVectorOfFloat32:
  case eFormatVectorOfFloat64:
    return eFormatFloat;

  default:
    return lldb::eFormatInvalid;
  }
}

bool FormatManager::ShouldPrintAsOneLiner(ValueObject &valobj) {
  // if settings say no oneline whatsoever
  if (valobj.GetTargetSP().get() &&
      !valobj.GetTargetSP()->GetDebugger().GetAutoOneLineSummaries())
    return false; // then don't oneline

  // if this object has a summary, then ask the summary
  if (valobj.GetSummaryFormat().get() != nullptr)
    return valobj.GetSummaryFormat()->IsOneLiner();

  // no children, no party
  if (valobj.GetNumChildren() == 0)
    return false;

  // ask the type if it has any opinion about this eLazyBoolCalculate == no
  // opinion; other values should be self explanatory
  CompilerType compiler_type(valobj.GetCompilerType());
  if (compiler_type.IsValid()) {
    switch (compiler_type.ShouldPrintAsOneLiner(&valobj)) {
    case eLazyBoolNo:
      return false;
    case eLazyBoolYes:
      return true;
    case eLazyBoolCalculate:
      break;
    }
  }

  size_t total_children_name_len = 0;

  for (size_t idx = 0; idx < valobj.GetNumChildren(); idx++) {
    bool is_synth_val = false;
    ValueObjectSP child_sp(valobj.GetChildAtIndex(idx, true));
    // something is wrong here - bail out
    if (!child_sp)
      return false;

    // also ask the child's type if it has any opinion
    CompilerType child_compiler_type(child_sp->GetCompilerType());
    if (child_compiler_type.IsValid()) {
      switch (child_compiler_type.ShouldPrintAsOneLiner(child_sp.get())) {
      case eLazyBoolYes:
      // an opinion of yes is only binding for the child, so keep going
      case eLazyBoolCalculate:
        break;
      case eLazyBoolNo:
        // but if the child says no, then it's a veto on the whole thing
        return false;
      }
    }

    // if we decided to define synthetic children for a type, we probably care
    // enough to show them, but avoid nesting children in children
    if (child_sp->GetSyntheticChildren().get() != nullptr) {
      ValueObjectSP synth_sp(child_sp->GetSyntheticValue());
      // wait.. wat? just get out of here..
      if (!synth_sp)
        return false;
      // but if we only have them to provide a value, keep going
      if (!synth_sp->MightHaveChildren() &&
          synth_sp->DoesProvideSyntheticValue())
        is_synth_val = true;
      else
        return false;
    }

    total_children_name_len += child_sp->GetName().GetLength();

    // 50 itself is a "randomly" chosen number - the idea is that
    // overly long structs should not get this treatment
    // FIXME: maybe make this a user-tweakable setting?
    if (total_children_name_len > 50)
      return false;

    // if a summary is there..
    if (child_sp->GetSummaryFormat()) {
      // and it wants children, then bail out
      if (child_sp->GetSummaryFormat()->DoesPrintChildren(child_sp.get()))
        return false;
    }

    // if this child has children..
    if (child_sp->GetNumChildren()) {
      // ...and no summary...
      // (if it had a summary and the summary wanted children, we would have
      // bailed out anyway
      //  so this only makes us bail out if this has no summary and we would
      //  then print children)
      if (!child_sp->GetSummaryFormat() && !is_synth_val) // but again only do
                                                          // that if not a
                                                          // synthetic valued
                                                          // child
        return false;                                     // then bail out
    }
  }
  return true;
}

ConstString FormatManager::GetValidTypeName(ConstString type) {
  return ::GetValidTypeName_Impl(type);
}

ConstString FormatManager::GetTypeForCache(ValueObject &valobj,
                                           lldb::DynamicValueType use_dynamic) {
  ValueObjectSP valobj_sp = valobj.GetQualifiedRepresentationIfAvailable(
      use_dynamic, valobj.IsSynthetic());
  if (valobj_sp && valobj_sp->GetCompilerType().IsValid()) {
    if (!valobj_sp->GetCompilerType().IsMeaninglessWithoutDynamicResolution())
      return valobj_sp->GetQualifiedTypeName();
  }
  return ConstString();
}

std::vector<lldb::LanguageType>
FormatManager::GetCandidateLanguages(ValueObject &valobj) {
  lldb::LanguageType lang_type = valobj.GetObjectRuntimeLanguage();
  return GetCandidateLanguages(lang_type);
}

std::vector<lldb::LanguageType>
FormatManager::GetCandidateLanguages(lldb::LanguageType lang_type) {
  switch (lang_type) {
  case lldb::eLanguageTypeC:
  case lldb::eLanguageTypeC89:
  case lldb::eLanguageTypeC99:
  case lldb::eLanguageTypeC11:
  case lldb::eLanguageTypeC_plus_plus:
  case lldb::eLanguageTypeC_plus_plus_03:
  case lldb::eLanguageTypeC_plus_plus_11:
  case lldb::eLanguageTypeC_plus_plus_14:
    return {lldb::eLanguageTypeC_plus_plus, lldb::eLanguageTypeObjC};
  default:
    return {lang_type};
  }
}

LanguageCategory *
FormatManager::GetCategoryForLanguage(lldb::LanguageType lang_type) {
  std::lock_guard<std::recursive_mutex> guard(m_language_categories_mutex);
  auto iter = m_language_categories_map.find(lang_type),
       end = m_language_categories_map.end();
  if (iter != end)
    return iter->second.get();
  LanguageCategory *lang_category = new LanguageCategory(lang_type);
  m_language_categories_map[lang_type] =
      LanguageCategory::UniquePointer(lang_category);
  return lang_category;
}

lldb::TypeFormatImplSP
FormatManager::GetHardcodedFormat(FormattersMatchData &match_data) {
  TypeFormatImplSP retval_sp;

  for (lldb::LanguageType lang_type : match_data.GetCandidateLanguages()) {
    if (LanguageCategory *lang_category = GetCategoryForLanguage(lang_type)) {
      if (lang_category->GetHardcoded(*this, match_data, retval_sp))
        break;
    }
  }

  return retval_sp;
}

lldb::TypeFormatImplSP
FormatManager::GetFormat(ValueObject &valobj,
                         lldb::DynamicValueType use_dynamic) {
  FormattersMatchData match_data(valobj, use_dynamic);

  TypeFormatImplSP retval;
  Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_DATAFORMATTERS));
  if (match_data.GetTypeForCache()) {
    if (log)
      log->Printf(
          "\n\n[FormatManager::GetFormat] Looking into cache for type %s",
          match_data.GetTypeForCache().AsCString("<invalid>"));
    if (m_format_cache.GetFormat(match_data.GetTypeForCache(), retval)) {
      if (log) {
        log->Printf(
            "[FormatManager::GetFormat] Cache search success. Returning.");
        LLDB_LOGV(log, "Cache hits: {0} - Cache Misses: {1}",
                  m_format_cache.GetCacheHits(),
                  m_format_cache.GetCacheMisses());
      }
      return retval;
    }
    if (log)
      log->Printf(
          "[FormatManager::GetFormat] Cache search failed. Going normal route");
  }

  retval = m_categories_map.GetFormat(match_data);
  if (!retval) {
    if (log)
      log->Printf("[FormatManager::GetFormat] Search failed. Giving language a "
                  "chance.");
    for (lldb::LanguageType lang_type : match_data.GetCandidateLanguages()) {
      if (LanguageCategory *lang_category = GetCategoryForLanguage(lang_type)) {
        if (lang_category->Get(match_data, retval))
          break;
      }
    }
    if (retval) {
      if (log)
        log->Printf(
            "[FormatManager::GetFormat] Language search success. Returning.");
      return retval;
    }
  }
  if (!retval) {
    if (log)
      log->Printf("[FormatManager::GetFormat] Search failed. Giving hardcoded "
                  "a chance.");
    retval = GetHardcodedFormat(match_data);
  }

  if (match_data.GetTypeForCache() && (!retval || !retval->NonCacheable())) {
    if (log)
      log->Printf("[FormatManager::GetFormat] Caching %p for type %s",
                  static_cast<void *>(retval.get()),
                  match_data.GetTypeForCache().AsCString("<invalid>"));
    m_format_cache.SetFormat(match_data.GetTypeForCache(), retval);
  }
  LLDB_LOGV(log, "Cache hits: {0} - Cache Misses: {1}",
            m_format_cache.GetCacheHits(), m_format_cache.GetCacheMisses());
  return retval;
}

lldb::TypeSummaryImplSP
FormatManager::GetHardcodedSummaryFormat(FormattersMatchData &match_data) {
  TypeSummaryImplSP retval_sp;

  for (lldb::LanguageType lang_type : match_data.GetCandidateLanguages()) {
    if (LanguageCategory *lang_category = GetCategoryForLanguage(lang_type)) {
      if (lang_category->GetHardcoded(*this, match_data, retval_sp))
        break;
    }
  }

  return retval_sp;
}

lldb::TypeSummaryImplSP
FormatManager::GetSummaryFormat(ValueObject &valobj,
                                lldb::DynamicValueType use_dynamic) {
  FormattersMatchData match_data(valobj, use_dynamic);

  TypeSummaryImplSP retval;
  Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_DATAFORMATTERS));
  if (match_data.GetTypeForCache()) {
    if (log)
      log->Printf("\n\n[FormatManager::GetSummaryFormat] Looking into cache "
                  "for type %s",
                  match_data.GetTypeForCache().AsCString("<invalid>"));
    if (m_format_cache.GetSummary(match_data.GetTypeForCache(), retval)) {
      if (log) {
        log->Printf("[FormatManager::GetSummaryFormat] Cache search success. "
                    "Returning.");
        LLDB_LOGV(log, "Cache hits: {0} - Cache Misses: {1}",
                  m_format_cache.GetCacheHits(),
                  m_format_cache.GetCacheMisses());
      }
      return retval;
    }
    if (log)
      log->Printf("[FormatManager::GetSummaryFormat] Cache search failed. "
                  "Going normal route");
  }

  retval = m_categories_map.GetSummaryFormat(match_data);
  if (!retval) {
    if (log)
      log->Printf("[FormatManager::GetSummaryFormat] Search failed. Giving "
                  "language a chance.");
    for (lldb::LanguageType lang_type : match_data.GetCandidateLanguages()) {
      if (LanguageCategory *lang_category = GetCategoryForLanguage(lang_type)) {
        if (lang_category->Get(match_data, retval))
          break;
      }
    }
    if (retval) {
      if (log)
        log->Printf("[FormatManager::GetSummaryFormat] Language search "
                    "success. Returning.");
      return retval;
    }
  }
  if (!retval) {
    if (log)
      log->Printf("[FormatManager::GetSummaryFormat] Search failed. Giving "
                  "hardcoded a chance.");
    retval = GetHardcodedSummaryFormat(match_data);
  }

  if (match_data.GetTypeForCache() && (!retval || !retval->NonCacheable())) {
    if (log)
      log->Printf("[FormatManager::GetSummaryFormat] Caching %p for type %s",
                  static_cast<void *>(retval.get()),
                  match_data.GetTypeForCache().AsCString("<invalid>"));
    m_format_cache.SetSummary(match_data.GetTypeForCache(), retval);
  }
  LLDB_LOGV(log, "Cache hits: {0} - Cache Misses: {1}",
            m_format_cache.GetCacheHits(), m_format_cache.GetCacheMisses());
  return retval;
}

lldb::SyntheticChildrenSP
FormatManager::GetHardcodedSyntheticChildren(FormattersMatchData &match_data) {
  SyntheticChildrenSP retval_sp;

  for (lldb::LanguageType lang_type : match_data.GetCandidateLanguages()) {
    if (LanguageCategory *lang_category = GetCategoryForLanguage(lang_type)) {
      if (lang_category->GetHardcoded(*this, match_data, retval_sp))
        break;
    }
  }

  return retval_sp;
}

lldb::SyntheticChildrenSP
FormatManager::GetSyntheticChildren(ValueObject &valobj,
                                    lldb::DynamicValueType use_dynamic) {
  FormattersMatchData match_data(valobj, use_dynamic);

  SyntheticChildrenSP retval;
  Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_DATAFORMATTERS));
  if (match_data.GetTypeForCache()) {
    if (log)
      log->Printf("\n\n[FormatManager::GetSyntheticChildren] Looking into "
                  "cache for type %s",
                  match_data.GetTypeForCache().AsCString("<invalid>"));
    if (m_format_cache.GetSynthetic(match_data.GetTypeForCache(), retval)) {
      if (log) {
        log->Printf("[FormatManager::GetSyntheticChildren] Cache search "
                    "success. Returning.");
        LLDB_LOGV(log, "Cache hits: {0} - Cache Misses: {1}",
                  m_format_cache.GetCacheHits(),
                  m_format_cache.GetCacheMisses());
      }
      return retval;
    }
    if (log)
      log->Printf("[FormatManager::GetSyntheticChildren] Cache search failed. "
                  "Going normal route");
  }

  retval = m_categories_map.GetSyntheticChildren(match_data);
  if (!retval) {
    if (log)
      log->Printf("[FormatManager::GetSyntheticChildren] Search failed. Giving "
                  "language a chance.");
    for (lldb::LanguageType lang_type : match_data.GetCandidateLanguages()) {
      if (LanguageCategory *lang_category = GetCategoryForLanguage(lang_type)) {
        if (lang_category->Get(match_data, retval))
          break;
      }
    }
    if (retval) {
      if (log)
        log->Printf("[FormatManager::GetSyntheticChildren] Language search "
                    "success. Returning.");
      return retval;
    }
  }
  if (!retval) {
    if (log)
      log->Printf("[FormatManager::GetSyntheticChildren] Search failed. Giving "
                  "hardcoded a chance.");
    retval = GetHardcodedSyntheticChildren(match_data);
  }

  if (match_data.GetTypeForCache() && (!retval || !retval->NonCacheable())) {
    if (log)
      log->Printf(
          "[FormatManager::GetSyntheticChildren] Caching %p for type %s",
          static_cast<void *>(retval.get()),
          match_data.GetTypeForCache().AsCString("<invalid>"));
    m_format_cache.SetSynthetic(match_data.GetTypeForCache(), retval);
  }
  LLDB_LOGV(log, "Cache hits: {0} - Cache Misses: {1}",
            m_format_cache.GetCacheHits(), m_format_cache.GetCacheMisses());
  return retval;
}

lldb::TypeValidatorImplSP
FormatManager::GetValidator(ValueObject &valobj,
                            lldb::DynamicValueType use_dynamic) {
  FormattersMatchData match_data(valobj, use_dynamic);

  TypeValidatorImplSP retval;
  Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_DATAFORMATTERS));
  if (match_data.GetTypeForCache()) {
    if (log)
      log->Printf(
          "\n\n[FormatManager::GetValidator] Looking into cache for type %s",
          match_data.GetTypeForCache().AsCString("<invalid>"));
    if (m_format_cache.GetValidator(match_data.GetTypeForCache(), retval)) {
      if (log) {
        log->Printf(
            "[FormatManager::GetValidator] Cache search success. Returning.");
        LLDB_LOGV(log, "Cache hits: {0} - Cache Misses: {1}",
                  m_format_cache.GetCacheHits(),
                  m_format_cache.GetCacheMisses());
      }
      return retval;
    }
    if (log)
      log->Printf("[FormatManager::GetValidator] Cache search failed. Going "
                  "normal route");
  }

  retval = m_categories_map.GetValidator(match_data);
  if (!retval) {
    if (log)
      log->Printf("[FormatManager::GetValidator] Search failed. Giving "
                  "language a chance.");
    for (lldb::LanguageType lang_type : match_data.GetCandidateLanguages()) {
      if (LanguageCategory *lang_category = GetCategoryForLanguage(lang_type)) {
        if (lang_category->Get(match_data, retval))
          break;
      }
    }
    if (retval) {
      if (log)
        log->Printf("[FormatManager::GetValidator] Language search success. "
                    "Returning.");
      return retval;
    }
  }
  if (!retval) {
    if (log)
      log->Printf("[FormatManager::GetValidator] Search failed. Giving "
                  "hardcoded a chance.");
    retval = GetHardcodedValidator(match_data);
  }

  if (match_data.GetTypeForCache() && (!retval || !retval->NonCacheable())) {
    if (log)
      log->Printf("[FormatManager::GetValidator] Caching %p for type %s",
                  static_cast<void *>(retval.get()),
                  match_data.GetTypeForCache().AsCString("<invalid>"));
    m_format_cache.SetValidator(match_data.GetTypeForCache(), retval);
  }
  LLDB_LOGV(log, "Cache hits: {0} - Cache Misses: {1}",
            m_format_cache.GetCacheHits(), m_format_cache.GetCacheMisses());
  return retval;
}

lldb::TypeValidatorImplSP
FormatManager::GetHardcodedValidator(FormattersMatchData &match_data) {
  TypeValidatorImplSP retval_sp;

  for (lldb::LanguageType lang_type : match_data.GetCandidateLanguages()) {
    if (LanguageCategory *lang_category = GetCategoryForLanguage(lang_type)) {
      if (lang_category->GetHardcoded(*this, match_data, retval_sp))
        break;
    }
  }

  return retval_sp;
}

FormatManager::FormatManager()
    : m_last_revision(0), m_format_cache(), m_language_categories_mutex(),
      m_language_categories_map(), m_named_summaries_map(this),
      m_categories_map(this), m_default_category_name(ConstString("default")),
      m_system_category_name(ConstString("system")),
      m_vectortypes_category_name(ConstString("VectorTypes")) {
  LoadSystemFormatters();
  LoadVectorFormatters();

  EnableCategory(m_vectortypes_category_name, TypeCategoryMap::Last,
                 lldb::eLanguageTypeObjC_plus_plus);
  EnableCategory(m_system_category_name, TypeCategoryMap::Last,
                 lldb::eLanguageTypeObjC_plus_plus);
}

void FormatManager::LoadSystemFormatters() {
  TypeSummaryImpl::Flags string_flags;
  string_flags.SetCascades(true)
      .SetSkipPointers(true)
      .SetSkipReferences(false)
      .SetDontShowChildren(true)
      .SetDontShowValue(false)
      .SetShowMembersOneLiner(false)
      .SetHideItemNames(false);

  TypeSummaryImpl::Flags string_array_flags;
  string_array_flags.SetCascades(true)
      .SetSkipPointers(true)
      .SetSkipReferences(false)
      .SetDontShowChildren(true)
      .SetDontShowValue(true)
      .SetShowMembersOneLiner(false)
      .SetHideItemNames(false);

  lldb::TypeSummaryImplSP string_format(
      new StringSummaryFormat(string_flags, "${var%s}"));

  lldb::TypeSummaryImplSP string_array_format(
      new StringSummaryFormat(string_array_flags, "${var%s}"));

  lldb::RegularExpressionSP any_size_char_arr(
      new RegularExpression(llvm::StringRef("char \\[[0-9]+\\]")));
  lldb::RegularExpressionSP any_size_wchar_arr(
      new RegularExpression(llvm::StringRef("wchar_t \\[[0-9]+\\]")));

  TypeCategoryImpl::SharedPointer sys_category_sp =
      GetCategory(m_system_category_name);

  sys_category_sp->GetTypeSummariesContainer()->Add(ConstString("char *"),
                                                    string_format);
  sys_category_sp->GetTypeSummariesContainer()->Add(
      ConstString("unsigned char *"), string_format);
  sys_category_sp->GetRegexTypeSummariesContainer()->Add(any_size_char_arr,
                                                         string_array_format);

  lldb::TypeSummaryImplSP ostype_summary(
      new StringSummaryFormat(TypeSummaryImpl::Flags()
                                  .SetCascades(false)
                                  .SetSkipPointers(true)
                                  .SetSkipReferences(true)
                                  .SetDontShowChildren(true)
                                  .SetDontShowValue(false)
                                  .SetShowMembersOneLiner(false)
                                  .SetHideItemNames(false),
                              "${var%O}"));

  sys_category_sp->GetTypeSummariesContainer()->Add(ConstString("OSType"),
                                                    ostype_summary);

  TypeFormatImpl::Flags fourchar_flags;
  fourchar_flags.SetCascades(true).SetSkipPointers(true).SetSkipReferences(
      true);

  AddFormat(sys_category_sp, lldb::eFormatOSType, ConstString("FourCharCode"),
            fourchar_flags);
}

void FormatManager::LoadVectorFormatters() {
  TypeCategoryImpl::SharedPointer vectors_category_sp =
      GetCategory(m_vectortypes_category_name);

  TypeSummaryImpl::Flags vector_flags;
  vector_flags.SetCascades(true)
      .SetSkipPointers(true)
      .SetSkipReferences(false)
      .SetDontShowChildren(true)
      .SetDontShowValue(false)
      .SetShowMembersOneLiner(true)
      .SetHideItemNames(true);

  AddStringSummary(vectors_category_sp, "${var.uint128}",
                   ConstString("builtin_type_vec128"), vector_flags);

  AddStringSummary(vectors_category_sp, "", ConstString("float [4]"),
                   vector_flags);
  AddStringSummary(vectors_category_sp, "", ConstString("int32_t [4]"),
                   vector_flags);
  AddStringSummary(vectors_category_sp, "", ConstString("int16_t [8]"),
                   vector_flags);
  AddStringSummary(vectors_category_sp, "", ConstString("vDouble"),
                   vector_flags);
  AddStringSummary(vectors_category_sp, "", ConstString("vFloat"),
                   vector_flags);
  AddStringSummary(vectors_category_sp, "", ConstString("vSInt8"),
                   vector_flags);
  AddStringSummary(vectors_category_sp, "", ConstString("vSInt16"),
                   vector_flags);
  AddStringSummary(vectors_category_sp, "", ConstString("vSInt32"),
                   vector_flags);
  AddStringSummary(vectors_category_sp, "", ConstString("vUInt16"),
                   vector_flags);
  AddStringSummary(vectors_category_sp, "", ConstString("vUInt8"),
                   vector_flags);
  AddStringSummary(vectors_category_sp, "", ConstString("vUInt16"),
                   vector_flags);
  AddStringSummary(vectors_category_sp, "", ConstString("vUInt32"),
                   vector_flags);
  AddStringSummary(vectors_category_sp, "", ConstString("vBool32"),
                   vector_flags);
}