Import LLVM 10.0.0 release including clang, lld and lldb.

ok hackroom
tested by plenty

1 files changed, 846 insertions, 0 deletions

diff --git a/gnu/llvm/lldb/source/Plugins/Language/ObjC/NSArray.cpp b/gnu/llvm/lldb/source/Plugins/Language/ObjC/NSArray.cpp
new file mode 100644
index 00000000000..73335aff2fd
--- /dev/null
+++ b/gnu/llvm/lldb/source/Plugins/Language/ObjC/NSArray.cpp
@@ -0,0 +1,846 @@
+//===-- NSArray.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 "clang/AST/ASTContext.h"
+
+#include "Cocoa.h"
+
+#include "Plugins/LanguageRuntime/ObjC/AppleObjCRuntime/AppleObjCRuntime.h"
+
+#include "lldb/Core/ValueObject.h"
+#include "lldb/Core/ValueObjectConstResult.h"
+#include "lldb/DataFormatters/FormattersHelpers.h"
+#include "lldb/Expression/FunctionCaller.h"
+#include "lldb/Symbol/ClangASTContext.h"
+#include "lldb/Target/Language.h"
+#include "lldb/Target/Target.h"
+#include "lldb/Utility/DataBufferHeap.h"
+#include "lldb/Utility/Endian.h"
+#include "lldb/Utility/Status.h"
+#include "lldb/Utility/Stream.h"
+
+using namespace lldb;
+using namespace lldb_private;
+using namespace lldb_private::formatters;
+
+namespace lldb_private {
+namespace formatters {
+std::map<ConstString, CXXFunctionSummaryFormat::Callback> &
+NSArray_Additionals::GetAdditionalSummaries() {
+  static std::map<ConstString, CXXFunctionSummaryFormat::Callback> g_map;
+  return g_map;
+}
+
+std::map<ConstString, CXXSyntheticChildren::CreateFrontEndCallback> &
+NSArray_Additionals::GetAdditionalSynthetics() {
+  static std::map<ConstString, CXXSyntheticChildren::CreateFrontEndCallback>
+      g_map;
+  return g_map;
+}
+
+class NSArrayMSyntheticFrontEndBase : public SyntheticChildrenFrontEnd {
+public:
+  NSArrayMSyntheticFrontEndBase(lldb::ValueObjectSP valobj_sp);
+
+  ~NSArrayMSyntheticFrontEndBase() override = default;
+
+  size_t CalculateNumChildren() override;
+
+  lldb::ValueObjectSP GetChildAtIndex(size_t idx) override;
+
+  bool Update() override = 0;
+
+  bool MightHaveChildren() override;
+
+  size_t GetIndexOfChildWithName(ConstString name) override;
+
+protected:
+  virtual lldb::addr_t GetDataAddress() = 0;
+
+  virtual uint64_t GetUsedCount() = 0;
+
+  virtual uint64_t GetOffset() = 0;
+
+  virtual uint64_t GetSize() = 0;
+
+  ExecutionContextRef m_exe_ctx_ref;
+  uint8_t m_ptr_size;
+  CompilerType m_id_type;
+};
+
+template <typename D32, typename D64>
+class GenericNSArrayMSyntheticFrontEnd : public NSArrayMSyntheticFrontEndBase {
+public:
+  GenericNSArrayMSyntheticFrontEnd(lldb::ValueObjectSP valobj_sp);
+
+  ~GenericNSArrayMSyntheticFrontEnd() override;
+
+  bool Update() override;
+
+protected:
+  lldb::addr_t GetDataAddress() override;
+
+  uint64_t GetUsedCount() override;
+
+  uint64_t GetOffset() override;
+
+  uint64_t GetSize() override;
+
+private:
+  D32 *m_data_32;
+  D64 *m_data_64;
+};
+  
+namespace Foundation1010 {
+  struct DataDescriptor_32 {
+    uint32_t _used;
+    uint32_t _offset;
+    uint32_t _size : 28;
+    uint64_t _priv1 : 4;
+    uint32_t _priv2;
+    uint32_t _data;
+  };
+  
+  struct DataDescriptor_64 {
+    uint64_t _used;
+    uint64_t _offset;
+    uint64_t _size : 60;
+    uint64_t _priv1 : 4;
+    uint32_t _priv2;
+    uint64_t _data;
+  };
+  
+  using NSArrayMSyntheticFrontEnd =
+      GenericNSArrayMSyntheticFrontEnd<DataDescriptor_32, DataDescriptor_64>;
+}
+  
+namespace Foundation1428 {
+  struct DataDescriptor_32 {
+    uint32_t _used;
+    uint32_t _offset;
+    uint32_t _size;
+    uint32_t _data;
+  };
+  
+  struct DataDescriptor_64 {
+    uint64_t _used;
+    uint64_t _offset;
+    uint64_t _size;
+    uint64_t _data;
+  };
+  
+  using NSArrayMSyntheticFrontEnd =
+      GenericNSArrayMSyntheticFrontEnd<DataDescriptor_32, DataDescriptor_64>;
+}
+  
+namespace Foundation1437 {
+  template <typename PtrType>
+  struct DataDescriptor {
+    PtrType _cow;
+    // __deque
+    PtrType _data;
+    uint32_t _offset;
+    uint32_t _size;
+    uint32_t _muts;
+    uint32_t _used;
+  };
+    
+  using NSArrayMSyntheticFrontEnd =
+     GenericNSArrayMSyntheticFrontEnd<
+        DataDescriptor<uint32_t>, DataDescriptor<uint64_t>>;
+  
+  template <typename DD>
+  uint64_t
+  __NSArrayMSize_Impl(lldb_private::Process &process,
+                      lldb::addr_t valobj_addr, Status &error) {
+    const lldb::addr_t start_of_descriptor =
+    valobj_addr + process.GetAddressByteSize();
+    DD descriptor = DD();
+    process.ReadMemory(start_of_descriptor, &descriptor,
+                       sizeof(descriptor), error);
+    if (error.Fail()) {
+      return 0;
+    }
+    return descriptor._used;
+  }
+  
+  uint64_t
+  __NSArrayMSize(lldb_private::Process &process, lldb::addr_t valobj_addr,
+                 Status &error) {
+    if (process.GetAddressByteSize() == 4) {
+      return __NSArrayMSize_Impl<DataDescriptor<uint32_t>>(process, valobj_addr,
+                                                           error);
+    } else {
+      return __NSArrayMSize_Impl<DataDescriptor<uint64_t>>(process, valobj_addr,
+                                                           error);
+    }
+  }
+
+}
+
+namespace CallStackArray {
+struct DataDescriptor_32 {
+  uint32_t _data;
+  uint32_t _used;
+  uint32_t _offset;
+  const uint32_t _size = 0;
+};
+
+struct DataDescriptor_64 {
+  uint64_t _data;
+  uint64_t _used;
+  uint64_t _offset;
+  const uint64_t _size = 0;
+};
+
+using NSCallStackArraySyntheticFrontEnd =
+    GenericNSArrayMSyntheticFrontEnd<DataDescriptor_32, DataDescriptor_64>;
+} // namespace CallStackArray
+
+template <typename D32, typename D64, bool Inline>
+class GenericNSArrayISyntheticFrontEnd : public SyntheticChildrenFrontEnd {
+public:
+  GenericNSArrayISyntheticFrontEnd(lldb::ValueObjectSP valobj_sp);
+
+  ~GenericNSArrayISyntheticFrontEnd() override;
+
+  size_t CalculateNumChildren() override;
+
+  lldb::ValueObjectSP GetChildAtIndex(size_t idx) override;
+
+  bool Update() override;
+
+  bool MightHaveChildren() override;
+
+  size_t GetIndexOfChildWithName(ConstString name) override;
+
+private:
+  ExecutionContextRef m_exe_ctx_ref;
+  uint8_t m_ptr_size;
+    
+  D32 *m_data_32;
+  D64 *m_data_64;
+  CompilerType m_id_type;
+};
+    
+namespace Foundation1300 {
+    struct IDD32 {
+        uint32_t used;
+        uint32_t list;
+    };
+    
+    struct IDD64 {
+        uint64_t used;
+        uint64_t list;
+    };
+    
+    using NSArrayISyntheticFrontEnd =
+        GenericNSArrayISyntheticFrontEnd<IDD32, IDD64, true>;
+}
+
+namespace Foundation1430 {
+    using NSArrayISyntheticFrontEnd =
+        Foundation1428::NSArrayMSyntheticFrontEnd;
+}
+
+namespace Foundation1436 {
+    struct IDD32 {
+        uint32_t used;
+        uint32_t list; // in Inline cases, this is the first element
+    };
+    
+    struct IDD64 {
+        uint64_t used;
+        uint64_t list; // in Inline cases, this is the first element
+    };
+    
+    using NSArrayI_TransferSyntheticFrontEnd =
+        GenericNSArrayISyntheticFrontEnd<IDD32, IDD64, false>;
+
+    using NSArrayISyntheticFrontEnd =
+        GenericNSArrayISyntheticFrontEnd<IDD32, IDD64, true>;
+    
+    using NSFrozenArrayMSyntheticFrontEnd =
+        Foundation1437::NSArrayMSyntheticFrontEnd;
+
+    uint64_t
+    __NSFrozenArrayMSize(lldb_private::Process &process, lldb::addr_t valobj_addr,
+                         Status &error) {
+      return Foundation1437::__NSArrayMSize(process, valobj_addr, error);
+    }
+}
+
+class NSArray0SyntheticFrontEnd : public SyntheticChildrenFrontEnd {
+public:
+  NSArray0SyntheticFrontEnd(lldb::ValueObjectSP valobj_sp);
+
+  ~NSArray0SyntheticFrontEnd() override = default;
+
+  size_t CalculateNumChildren() override;
+
+  lldb::ValueObjectSP GetChildAtIndex(size_t idx) override;
+
+  bool Update() override;
+
+  bool MightHaveChildren() override;
+
+  size_t GetIndexOfChildWithName(ConstString name) override;
+};
+
+class NSArray1SyntheticFrontEnd : public SyntheticChildrenFrontEnd {
+public:
+  NSArray1SyntheticFrontEnd(lldb::ValueObjectSP valobj_sp);
+
+  ~NSArray1SyntheticFrontEnd() override = default;
+
+  size_t CalculateNumChildren() override;
+
+  lldb::ValueObjectSP GetChildAtIndex(size_t idx) override;
+
+  bool Update() override;
+
+  bool MightHaveChildren() override;
+
+  size_t GetIndexOfChildWithName(ConstString name) override;
+};
+} // namespace formatters
+} // namespace lldb_private
+
+bool lldb_private::formatters::NSArraySummaryProvider(
+    ValueObject &valobj, Stream &stream, const TypeSummaryOptions &options) {
+  static ConstString g_TypeHint("NSArray");
+
+  ProcessSP process_sp = valobj.GetProcessSP();
+  if (!process_sp)
+    return false;
+
+  ObjCLanguageRuntime *runtime = ObjCLanguageRuntime::Get(*process_sp);
+
+  if (!runtime)
+    return false;
+
+  ObjCLanguageRuntime::ClassDescriptorSP descriptor(
+      runtime->GetClassDescriptor(valobj));
+
+  if (!descriptor || !descriptor->IsValid())
+    return false;
+
+  uint32_t ptr_size = process_sp->GetAddressByteSize();
+
+  lldb::addr_t valobj_addr = valobj.GetValueAsUnsigned(0);
+
+  if (!valobj_addr)
+    return false;
+
+  uint64_t value = 0;
+
+  ConstString class_name(descriptor->GetClassName());
+
+  static const ConstString g_NSArrayI("__NSArrayI");
+  static const ConstString g_NSArrayM("__NSArrayM");
+  static const ConstString g_NSArrayI_Transfer("__NSArrayI_Transfer");
+  static const ConstString g_NSFrozenArrayM("__NSFrozenArrayM");
+  static const ConstString g_NSArray0("__NSArray0");
+  static const ConstString g_NSArray1("__NSSingleObjectArrayI");
+  static const ConstString g_NSArrayCF("__NSCFArray");
+  static const ConstString g_NSArrayMLegacy("__NSArrayM_Legacy");
+  static const ConstString g_NSArrayMImmutable("__NSArrayM_Immutable");
+  static const ConstString g_NSCallStackArray("_NSCallStackArray");
+
+  if (class_name.IsEmpty())
+    return false;
+
+  if (class_name == g_NSArrayI) {
+    Status error;
+    value = process_sp->ReadUnsignedIntegerFromMemory(valobj_addr + ptr_size,
+                                                      ptr_size, 0, error);
+    if (error.Fail())
+      return false;
+  } else if (class_name == g_NSArrayM) {
+    AppleObjCRuntime *apple_runtime =
+    llvm::dyn_cast_or_null<AppleObjCRuntime>(runtime);
+    Status error;
+    if (apple_runtime && apple_runtime->GetFoundationVersion() >= 1437) {
+      value = Foundation1437::__NSArrayMSize(*process_sp, valobj_addr, error);
+    } else {
+      value = process_sp->ReadUnsignedIntegerFromMemory(valobj_addr + ptr_size,
+                                                        ptr_size, 0, error);
+    }
+    if (error.Fail())
+      return false;
+  } else if (class_name == g_NSArrayI_Transfer) {
+    Status error;
+    value = process_sp->ReadUnsignedIntegerFromMemory(valobj_addr + ptr_size,
+                                                      ptr_size, 0, error);
+    if (error.Fail())
+      return false;
+  } else if (class_name == g_NSFrozenArrayM) {
+    Status error;
+    value = Foundation1436::__NSFrozenArrayMSize(*process_sp, valobj_addr, error);
+    if (error.Fail())
+      return false;
+  } else if (class_name == g_NSArrayMLegacy) {
+    Status error;
+    value = process_sp->ReadUnsignedIntegerFromMemory(valobj_addr + ptr_size,
+                                                      ptr_size, 0, error);
+    if (error.Fail())
+      return false;
+  } else if (class_name == g_NSArrayMImmutable) {
+    Status error;
+    value = process_sp->ReadUnsignedIntegerFromMemory(valobj_addr + ptr_size,
+                                                      ptr_size, 0, error);
+    if (error.Fail())
+      return false;
+  } else if (class_name == g_NSArray0) {
+    value = 0;
+  } else if (class_name == g_NSArray1) {
+    value = 1;
+  } else if (class_name == g_NSArrayCF || class_name == g_NSCallStackArray) {
+    // __NSCFArray and _NSCallStackArray store the number of elements as a
+    // pointer-sized value at offset `2 * ptr_size`.
+    Status error;
+    value = process_sp->ReadUnsignedIntegerFromMemory(
+        valobj_addr + 2 * ptr_size, ptr_size, 0, error);
+    if (error.Fail())
+      return false;
+  } else {
+    auto &map(NSArray_Additionals::GetAdditionalSummaries());
+    auto iter = map.find(class_name), end = map.end();
+    if (iter != end)
+      return iter->second(valobj, stream, options);
+    else
+      return false;
+  }
+
+  std::string prefix, suffix;
+  if (Language *language = Language::FindPlugin(options.GetLanguage())) {
+    if (!language->GetFormatterPrefixSuffix(valobj, g_TypeHint, prefix,
+                                            suffix)) {
+      prefix.clear();
+      suffix.clear();
+    }
+  }
+
+  stream.Printf("%s%" PRIu64 " %s%s%s", prefix.c_str(), value, "element",
+                value == 1 ? "" : "s", suffix.c_str());
+  return true;
+}
+
+lldb_private::formatters::NSArrayMSyntheticFrontEndBase::NSArrayMSyntheticFrontEndBase(
+    lldb::ValueObjectSP valobj_sp)
+    : SyntheticChildrenFrontEnd(*valobj_sp), m_exe_ctx_ref(), m_ptr_size(8),
+      m_id_type() {
+  if (valobj_sp) {
+    auto *clang_ast_context = ClangASTContext::GetScratch(
+        *valobj_sp->GetExecutionContextRef().GetTargetSP());
+    if (clang_ast_context)
+      m_id_type = CompilerType(
+          clang_ast_context,
+          clang_ast_context->getASTContext().ObjCBuiltinIdTy.getAsOpaquePtr());
+    if (valobj_sp->GetProcessSP())
+      m_ptr_size = valobj_sp->GetProcessSP()->GetAddressByteSize();
+  }
+}
+
+template <typename D32, typename D64>
+lldb_private::formatters::
+  GenericNSArrayMSyntheticFrontEnd<D32, D64>::
+    GenericNSArrayMSyntheticFrontEnd(lldb::ValueObjectSP valobj_sp)
+    : NSArrayMSyntheticFrontEndBase(valobj_sp), m_data_32(nullptr),
+      m_data_64(nullptr) {}
+
+size_t
+lldb_private::formatters::NSArrayMSyntheticFrontEndBase::CalculateNumChildren() {
+  return GetUsedCount();
+}
+
+lldb::ValueObjectSP
+lldb_private::formatters::NSArrayMSyntheticFrontEndBase::GetChildAtIndex(
+    size_t idx) {
+  if (idx >= CalculateNumChildren())
+    return lldb::ValueObjectSP();
+  lldb::addr_t object_at_idx = GetDataAddress();
+  size_t pyhs_idx = idx;
+  pyhs_idx += GetOffset();
+  if (GetSize() <= pyhs_idx)
+    pyhs_idx -= GetSize();
+  object_at_idx += (pyhs_idx * m_ptr_size);
+  StreamString idx_name;
+  idx_name.Printf("[%" PRIu64 "]", (uint64_t)idx);
+  return CreateValueObjectFromAddress(idx_name.GetString(), object_at_idx,
+                                      m_exe_ctx_ref, m_id_type);
+}
+
+template <typename D32, typename D64>
+bool
+lldb_private::formatters::
+  GenericNSArrayMSyntheticFrontEnd<D32, D64>::Update() {
+  ValueObjectSP valobj_sp = m_backend.GetSP();
+  m_ptr_size = 0;
+  delete m_data_32;
+  m_data_32 = nullptr;
+  delete m_data_64;
+  m_data_64 = nullptr;
+  if (!valobj_sp)
+    return false;
+  m_exe_ctx_ref = valobj_sp->GetExecutionContextRef();
+  Status error;
+  error.Clear();
+  lldb::ProcessSP process_sp(valobj_sp->GetProcessSP());
+  if (!process_sp)
+    return false;
+  m_ptr_size = process_sp->GetAddressByteSize();
+  uint64_t data_location = valobj_sp->GetValueAsUnsigned(0) + m_ptr_size;
+  if (m_ptr_size == 4) {
+    m_data_32 = new D32();
+    process_sp->ReadMemory(data_location, m_data_32, sizeof(D32),
+                           error);
+  } else {
+    m_data_64 = new D64();
+    process_sp->ReadMemory(data_location, m_data_64, sizeof(D64),
+                           error);
+  }
+  if (error.Fail())
+    return false;
+  return false;
+}
+
+bool
+lldb_private::formatters::NSArrayMSyntheticFrontEndBase::MightHaveChildren() {
+  return true;
+}
+
+size_t
+lldb_private::formatters::NSArrayMSyntheticFrontEndBase::GetIndexOfChildWithName(
+    ConstString name) {
+  const char *item_name = name.GetCString();
+  uint32_t idx = ExtractIndexFromString(item_name);
+  if (idx < UINT32_MAX && idx >= CalculateNumChildren())
+    return UINT32_MAX;
+  return idx;
+}
+
+template <typename D32, typename D64>
+lldb_private::formatters::
+  GenericNSArrayMSyntheticFrontEnd<D32, D64>::
+    ~GenericNSArrayMSyntheticFrontEnd() {
+  delete m_data_32;
+  m_data_32 = nullptr;
+  delete m_data_64;
+  m_data_64 = nullptr;
+}
+
+template <typename D32, typename D64>
+lldb::addr_t
+lldb_private::formatters::
+  GenericNSArrayMSyntheticFrontEnd<D32, D64>::
+    GenericNSArrayMSyntheticFrontEnd::GetDataAddress() {
+  if (!m_data_32 && !m_data_64)
+    return LLDB_INVALID_ADDRESS;
+  return m_data_32 ? m_data_32->_data : m_data_64->_data;
+}
+
+template <typename D32, typename D64>
+uint64_t
+lldb_private::formatters::
+  GenericNSArrayMSyntheticFrontEnd<D32, D64>::
+    GenericNSArrayMSyntheticFrontEnd::GetUsedCount() {
+  if (!m_data_32 && !m_data_64)
+    return 0;
+  return m_data_32 ? m_data_32->_used : m_data_64->_used;
+}
+
+template <typename D32, typename D64>
+uint64_t
+lldb_private::formatters::
+  GenericNSArrayMSyntheticFrontEnd<D32, D64>::
+    GenericNSArrayMSyntheticFrontEnd::GetOffset() {
+  if (!m_data_32 && !m_data_64)
+    return 0;
+  return m_data_32 ? m_data_32->_offset : m_data_64->_offset;
+}
+
+template <typename D32, typename D64>
+uint64_t
+lldb_private::formatters::
+  GenericNSArrayMSyntheticFrontEnd<D32, D64>::
+    GenericNSArrayMSyntheticFrontEnd::GetSize() {
+  if (!m_data_32 && !m_data_64)
+    return 0;
+  return m_data_32 ? m_data_32->_size : m_data_64->_size;
+}
+
+template <typename D32, typename D64, bool Inline>
+lldb_private::formatters::GenericNSArrayISyntheticFrontEnd<D32, D64, Inline>::
+  GenericNSArrayISyntheticFrontEnd(
+    lldb::ValueObjectSP valobj_sp)
+    : SyntheticChildrenFrontEnd(*valobj_sp), m_exe_ctx_ref(), m_ptr_size(8),
+      m_data_32(nullptr), m_data_64(nullptr) {
+  if (valobj_sp) {
+    CompilerType type = valobj_sp->GetCompilerType();
+    if (type) {
+      auto *clang_ast_context = ClangASTContext::GetScratch(
+          *valobj_sp->GetExecutionContextRef().GetTargetSP());
+      if (clang_ast_context)
+        m_id_type = clang_ast_context->GetType(
+            clang_ast_context->getASTContext().ObjCBuiltinIdTy);
+    }
+  }
+}
+
+template <typename D32, typename D64, bool Inline>
+lldb_private::formatters::GenericNSArrayISyntheticFrontEnd<D32, D64, Inline>::
+  ~GenericNSArrayISyntheticFrontEnd() {
+  delete m_data_32;
+  m_data_32 = nullptr;
+  delete m_data_64;
+  m_data_64 = nullptr;
+}
+
+template <typename D32, typename D64, bool Inline>
+size_t
+lldb_private::formatters::GenericNSArrayISyntheticFrontEnd<D32, D64, Inline>::
+  GetIndexOfChildWithName(ConstString name) {
+  const char *item_name = name.GetCString();
+  uint32_t idx = ExtractIndexFromString(item_name);
+  if (idx < UINT32_MAX && idx >= CalculateNumChildren())
+    return UINT32_MAX;
+  return idx;
+}
+
+template <typename D32, typename D64, bool Inline>
+size_t
+lldb_private::formatters::GenericNSArrayISyntheticFrontEnd<D32, D64, Inline>::
+  CalculateNumChildren() {
+  return m_data_32 ? m_data_32->used : m_data_64->used;
+}
+
+template <typename D32, typename D64, bool Inline>
+bool
+lldb_private::formatters::GenericNSArrayISyntheticFrontEnd<D32, D64, Inline>::
+  Update() {
+  ValueObjectSP valobj_sp = m_backend.GetSP();
+  m_ptr_size = 0;
+  delete m_data_32;
+  m_data_32 = nullptr;
+  delete m_data_64;
+  m_data_64 = nullptr;
+  if (!valobj_sp)
+    return false;
+  m_exe_ctx_ref = valobj_sp->GetExecutionContextRef();
+  Status error;
+  error.Clear();
+  lldb::ProcessSP process_sp(valobj_sp->GetProcessSP());
+  if (!process_sp)
+    return false;
+  m_ptr_size = process_sp->GetAddressByteSize();
+  uint64_t data_location = valobj_sp->GetValueAsUnsigned(0) + m_ptr_size;
+  if (m_ptr_size == 4) {
+    m_data_32 = new D32();
+    process_sp->ReadMemory(data_location, m_data_32, sizeof(D32),
+                           error);
+  } else {
+    m_data_64 = new D64();
+    process_sp->ReadMemory(data_location, m_data_64, sizeof(D64),
+                           error);
+  }
+  if (error.Fail())
+    return false;
+  return false;
+}
+
+template <typename D32, typename D64, bool Inline>
+bool
+lldb_private::formatters::GenericNSArrayISyntheticFrontEnd<D32, D64, Inline>::
+  MightHaveChildren() {
+  return true;
+}
+
+template <typename D32, typename D64, bool Inline>
+lldb::ValueObjectSP
+lldb_private::formatters::GenericNSArrayISyntheticFrontEnd<D32, D64, Inline>::
+  GetChildAtIndex(size_t idx) {
+  if (idx >= CalculateNumChildren())
+    return lldb::ValueObjectSP();
+  lldb::addr_t object_at_idx;
+  if (Inline) {
+    object_at_idx = m_backend.GetSP()->GetValueAsUnsigned(0) + m_ptr_size;
+    object_at_idx += m_ptr_size == 4 ? sizeof(D32) : sizeof(D64); // skip the data header
+    object_at_idx -= m_ptr_size; // we treat the last entry in the data header as the first pointer
+  } else {
+    object_at_idx = m_data_32 ? m_data_32->list : m_data_64->list;
+  }
+  object_at_idx += (idx * m_ptr_size);
+
+  ProcessSP process_sp = m_exe_ctx_ref.GetProcessSP();
+  if (!process_sp)
+    return lldb::ValueObjectSP();
+  Status error;
+  if (error.Fail())
+    return lldb::ValueObjectSP();
+  StreamString idx_name;
+  idx_name.Printf("[%" PRIu64 "]", (uint64_t)idx);
+  return CreateValueObjectFromAddress(idx_name.GetString(), object_at_idx,
+                                      m_exe_ctx_ref, m_id_type);
+}
+
+lldb_private::formatters::NSArray0SyntheticFrontEnd::NSArray0SyntheticFrontEnd(
+    lldb::ValueObjectSP valobj_sp)
+    : SyntheticChildrenFrontEnd(*valobj_sp) {}
+
+size_t
+lldb_private::formatters::NSArray0SyntheticFrontEnd::GetIndexOfChildWithName(
+    ConstString name) {
+  return UINT32_MAX;
+}
+
+size_t
+lldb_private::formatters::NSArray0SyntheticFrontEnd::CalculateNumChildren() {
+  return 0;
+}
+
+bool lldb_private::formatters::NSArray0SyntheticFrontEnd::Update() {
+  return false;
+}
+
+bool lldb_private::formatters::NSArray0SyntheticFrontEnd::MightHaveChildren() {
+  return false;
+}
+
+lldb::ValueObjectSP
+lldb_private::formatters::NSArray0SyntheticFrontEnd::GetChildAtIndex(
+    size_t idx) {
+  return lldb::ValueObjectSP();
+}
+
+lldb_private::formatters::NSArray1SyntheticFrontEnd::NSArray1SyntheticFrontEnd(
+    lldb::ValueObjectSP valobj_sp)
+    : SyntheticChildrenFrontEnd(*valobj_sp.get()) {}
+
+size_t
+lldb_private::formatters::NSArray1SyntheticFrontEnd::GetIndexOfChildWithName(
+    ConstString name) {
+  static const ConstString g_zero("[0]");
+
+  if (name == g_zero)
+    return 0;
+
+  return UINT32_MAX;
+}
+
+size_t
+lldb_private::formatters::NSArray1SyntheticFrontEnd::CalculateNumChildren() {
+  return 1;
+}
+
+bool lldb_private::formatters::NSArray1SyntheticFrontEnd::Update() {
+  return false;
+}
+
+bool lldb_private::formatters::NSArray1SyntheticFrontEnd::MightHaveChildren() {
+  return true;
+}
+
+lldb::ValueObjectSP
+lldb_private::formatters::NSArray1SyntheticFrontEnd::GetChildAtIndex(
+    size_t idx) {
+  static const ConstString g_zero("[0]");
+
+  if (idx == 0) {
+    auto *clang_ast_context =
+        ClangASTContext::GetScratch(*m_backend.GetTargetSP());
+    if (clang_ast_context) {
+      CompilerType id_type(
+          clang_ast_context->GetBasicType(lldb::eBasicTypeObjCID));
+      return m_backend.GetSyntheticChildAtOffset(
+          m_backend.GetProcessSP()->GetAddressByteSize(), id_type, true,
+          g_zero);
+    }
+  }
+  return lldb::ValueObjectSP();
+}
+
+SyntheticChildrenFrontEnd *
+lldb_private::formatters::NSArraySyntheticFrontEndCreator(
+    CXXSyntheticChildren *synth, lldb::ValueObjectSP valobj_sp) {
+  if (!valobj_sp)
+    return nullptr;
+
+  lldb::ProcessSP process_sp(valobj_sp->GetProcessSP());
+  if (!process_sp)
+    return nullptr;
+  AppleObjCRuntime *runtime = llvm::dyn_cast_or_null<AppleObjCRuntime>(
+      ObjCLanguageRuntime::Get(*process_sp));
+  if (!runtime)
+    return nullptr;
+
+  CompilerType valobj_type(valobj_sp->GetCompilerType());
+  Flags flags(valobj_type.GetTypeInfo());
+
+  if (flags.IsClear(eTypeIsPointer)) {
+    Status error;
+    valobj_sp = valobj_sp->AddressOf(error);
+    if (error.Fail() || !valobj_sp)
+      return nullptr;
+  }
+
+  ObjCLanguageRuntime::ClassDescriptorSP descriptor(
+      runtime->GetClassDescriptor(*valobj_sp));
+
+  if (!descriptor || !descriptor->IsValid())
+    return nullptr;
+
+  ConstString class_name(descriptor->GetClassName());
+
+  static const ConstString g_NSArrayI("__NSArrayI");
+  static const ConstString g_NSArrayI_Transfer("__NSArrayI_Transfer");
+  static const ConstString g_NSFrozenArrayM("__NSFrozenArrayM");
+  static const ConstString g_NSArrayM("__NSArrayM");
+  static const ConstString g_NSArray0("__NSArray0");
+  static const ConstString g_NSArray1("__NSSingleObjectArrayI");
+  static const ConstString g_NSArrayMLegacy("__NSArrayM_Legacy");
+  static const ConstString g_NSArrayMImmutable("__NSArrayM_Immutable");
+  static const ConstString g_NSCallStackArray("_NSCallStackArray");
+
+  if (class_name.IsEmpty())
+    return nullptr;
+
+  if (class_name == g_NSArrayI) {
+    if (runtime->GetFoundationVersion() >= 1436)
+      return (new Foundation1436::NSArrayISyntheticFrontEnd(valobj_sp));
+    if (runtime->GetFoundationVersion() >= 1430)
+      return (new Foundation1430::NSArrayISyntheticFrontEnd(valobj_sp));
+    else
+      return (new Foundation1300::NSArrayISyntheticFrontEnd(valobj_sp));
+  } else if (class_name == g_NSArrayI_Transfer) {
+      return (new Foundation1436::NSArrayI_TransferSyntheticFrontEnd(valobj_sp));
+  } else if (class_name == g_NSArray0) {
+  } else if (class_name == g_NSFrozenArrayM) {
+    return (new Foundation1436::NSFrozenArrayMSyntheticFrontEnd(valobj_sp));
+  } else if (class_name == g_NSArray0) {
+    return (new NSArray0SyntheticFrontEnd(valobj_sp));
+  } else if (class_name == g_NSArray1) {
+    return (new NSArray1SyntheticFrontEnd(valobj_sp));
+  } else if (class_name == g_NSArrayM) {
+    if (runtime->GetFoundationVersion() >= 1437)
+      return (new Foundation1437::NSArrayMSyntheticFrontEnd(valobj_sp));
+    if (runtime->GetFoundationVersion() >= 1428)
+      return (new Foundation1428::NSArrayMSyntheticFrontEnd(valobj_sp));
+    if (runtime->GetFoundationVersion() >= 1100)
+      return (new Foundation1010::NSArrayMSyntheticFrontEnd(valobj_sp));
+  } else if (class_name == g_NSCallStackArray) {
+    return (new CallStackArray::NSCallStackArraySyntheticFrontEnd(valobj_sp));
+  } else {
+    auto &map(NSArray_Additionals::GetAdditionalSynthetics());
+    auto iter = map.find(class_name), end = map.end();
+    if (iter != end)
+      return iter->second(synth, valobj_sp);
+  }
+
+  return nullptr;
+}