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NSDictionary.cpp
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NSDictionary.cpp
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//===-- NSDictionary.cpp --------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include <mutex>
#include "clang/AST/DeclCXX.h"
#include "CFBasicHash.h"
#include "NSDictionary.h"
#include "Plugins/LanguageRuntime/ObjC/AppleObjCRuntime/AppleObjCRuntime.h"
#include "Plugins/TypeSystem/Clang/TypeSystemClang.h"
#include "lldb/Core/ValueObject.h"
#include "lldb/Core/ValueObjectConstResult.h"
#include "lldb/DataFormatters/FormattersHelpers.h"
#include "lldb/Target/Language.h"
#include "lldb/Target/StackFrame.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;
NSDictionary_Additionals::AdditionalFormatterMatching::Prefix::Prefix(
ConstString p)
: m_prefix(p) {}
bool NSDictionary_Additionals::AdditionalFormatterMatching::Prefix::Match(
ConstString class_name) {
return class_name.GetStringRef().startswith(m_prefix.GetStringRef());
}
NSDictionary_Additionals::AdditionalFormatterMatching::Full::Full(ConstString n)
: m_name(n) {}
bool NSDictionary_Additionals::AdditionalFormatterMatching::Full::Match(
ConstString class_name) {
return (class_name == m_name);
}
NSDictionary_Additionals::AdditionalFormatters<
CXXFunctionSummaryFormat::Callback> &
NSDictionary_Additionals::GetAdditionalSummaries() {
static AdditionalFormatters<CXXFunctionSummaryFormat::Callback> g_map;
return g_map;
}
NSDictionary_Additionals::AdditionalFormatters<
CXXSyntheticChildren::CreateFrontEndCallback> &
NSDictionary_Additionals::GetAdditionalSynthetics() {
static AdditionalFormatters<CXXSyntheticChildren::CreateFrontEndCallback>
g_map;
return g_map;
}
static CompilerType GetLLDBNSPairType(TargetSP target_sp) {
CompilerType compiler_type;
TypeSystemClang *target_ast_context = TypeSystemClang::GetScratch(*target_sp);
if (target_ast_context) {
ConstString g___lldb_autogen_nspair("__lldb_autogen_nspair");
compiler_type =
target_ast_context->GetTypeForIdentifier<clang::CXXRecordDecl>(
g___lldb_autogen_nspair);
if (!compiler_type) {
compiler_type = target_ast_context->CreateRecordType(
nullptr, OptionalClangModuleID(), lldb::eAccessPublic,
g___lldb_autogen_nspair.GetCString(), clang::TTK_Struct,
lldb::eLanguageTypeC);
if (compiler_type) {
TypeSystemClang::StartTagDeclarationDefinition(compiler_type);
CompilerType id_compiler_type =
target_ast_context->GetBasicType(eBasicTypeObjCID);
TypeSystemClang::AddFieldToRecordType(
compiler_type, "key", id_compiler_type, lldb::eAccessPublic, 0);
TypeSystemClang::AddFieldToRecordType(
compiler_type, "value", id_compiler_type, lldb::eAccessPublic, 0);
TypeSystemClang::CompleteTagDeclarationDefinition(compiler_type);
}
}
}
return compiler_type;
}
namespace lldb_private {
namespace formatters {
class NSDictionaryISyntheticFrontEnd : public SyntheticChildrenFrontEnd {
public:
NSDictionaryISyntheticFrontEnd(lldb::ValueObjectSP valobj_sp);
~NSDictionaryISyntheticFrontEnd() 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:
struct DataDescriptor_32 {
uint32_t _used : 26;
uint32_t _szidx : 6;
};
struct DataDescriptor_64 {
uint64_t _used : 58;
uint32_t _szidx : 6;
};
struct DictionaryItemDescriptor {
lldb::addr_t key_ptr;
lldb::addr_t val_ptr;
lldb::ValueObjectSP valobj_sp;
};
ExecutionContextRef m_exe_ctx_ref;
uint8_t m_ptr_size;
lldb::ByteOrder m_order;
DataDescriptor_32 *m_data_32;
DataDescriptor_64 *m_data_64;
lldb::addr_t m_data_ptr;
CompilerType m_pair_type;
std::vector<DictionaryItemDescriptor> m_children;
};
class NSCFDictionarySyntheticFrontEnd : public SyntheticChildrenFrontEnd {
public:
NSCFDictionarySyntheticFrontEnd(lldb::ValueObjectSP valobj_sp);
size_t CalculateNumChildren() override;
lldb::ValueObjectSP GetChildAtIndex(size_t idx) override;
bool Update() override;
bool MightHaveChildren() override;
size_t GetIndexOfChildWithName(ConstString name) override;
private:
struct DictionaryItemDescriptor {
lldb::addr_t key_ptr;
lldb::addr_t val_ptr;
lldb::ValueObjectSP valobj_sp;
};
ExecutionContextRef m_exe_ctx_ref;
uint8_t m_ptr_size;
lldb::ByteOrder m_order;
CFBasicHash m_hashtable;
CompilerType m_pair_type;
std::vector<DictionaryItemDescriptor> m_children;
};
class NSDictionary1SyntheticFrontEnd : public SyntheticChildrenFrontEnd {
public:
NSDictionary1SyntheticFrontEnd(lldb::ValueObjectSP valobj_sp);
~NSDictionary1SyntheticFrontEnd() 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;
private:
ValueObjectSP m_pair;
};
template <typename D32, typename D64>
class GenericNSDictionaryMSyntheticFrontEnd : public SyntheticChildrenFrontEnd {
public:
GenericNSDictionaryMSyntheticFrontEnd(lldb::ValueObjectSP valobj_sp);
~GenericNSDictionaryMSyntheticFrontEnd() 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:
struct DictionaryItemDescriptor {
lldb::addr_t key_ptr;
lldb::addr_t val_ptr;
lldb::ValueObjectSP valobj_sp;
};
ExecutionContextRef m_exe_ctx_ref;
uint8_t m_ptr_size;
lldb::ByteOrder m_order;
D32 *m_data_32;
D64 *m_data_64;
CompilerType m_pair_type;
std::vector<DictionaryItemDescriptor> m_children;
};
namespace Foundation1100 {
class NSDictionaryMSyntheticFrontEnd : public SyntheticChildrenFrontEnd {
public:
NSDictionaryMSyntheticFrontEnd(lldb::ValueObjectSP valobj_sp);
~NSDictionaryMSyntheticFrontEnd() 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:
struct DataDescriptor_32 {
uint32_t _used : 26;
uint32_t _kvo : 1;
uint32_t _size;
uint32_t _mutations;
uint32_t _objs_addr;
uint32_t _keys_addr;
};
struct DataDescriptor_64 {
uint64_t _used : 58;
uint32_t _kvo : 1;
uint64_t _size;
uint64_t _mutations;
uint64_t _objs_addr;
uint64_t _keys_addr;
};
struct DictionaryItemDescriptor {
lldb::addr_t key_ptr;
lldb::addr_t val_ptr;
lldb::ValueObjectSP valobj_sp;
};
ExecutionContextRef m_exe_ctx_ref;
uint8_t m_ptr_size;
lldb::ByteOrder m_order;
DataDescriptor_32 *m_data_32;
DataDescriptor_64 *m_data_64;
CompilerType m_pair_type;
std::vector<DictionaryItemDescriptor> m_children;
};
}
namespace Foundation1428 {
namespace {
struct DataDescriptor_32 {
uint32_t _used : 26;
uint32_t _kvo : 1;
uint32_t _size;
uint32_t _buffer;
uint64_t GetSize() { return _size; }
};
struct DataDescriptor_64 {
uint64_t _used : 58;
uint32_t _kvo : 1;
uint64_t _size;
uint64_t _buffer;
uint64_t GetSize() { return _size; }
};
}
using NSDictionaryMSyntheticFrontEnd =
GenericNSDictionaryMSyntheticFrontEnd<DataDescriptor_32, DataDescriptor_64>;
}
namespace Foundation1437 {
namespace {
static const uint64_t NSDictionaryCapacities[] = {
0, 3, 7, 13, 23, 41, 71, 127, 191, 251, 383, 631, 1087, 1723,
2803, 4523, 7351, 11959, 19447, 31231, 50683, 81919, 132607,
214519, 346607, 561109, 907759, 1468927, 2376191, 3845119,
6221311, 10066421, 16287743, 26354171, 42641881, 68996069,
111638519, 180634607, 292272623, 472907251
};
static const size_t NSDictionaryNumSizeBuckets =
sizeof(NSDictionaryCapacities) / sizeof(uint64_t);
struct DataDescriptor_32 {
uint32_t _buffer;
uint32_t _muts;
uint32_t _used : 25;
uint32_t _kvo : 1;
uint32_t _szidx : 6;
uint64_t GetSize() {
return (_szidx) >= NSDictionaryNumSizeBuckets ?
0 : NSDictionaryCapacities[_szidx];
}
};
struct DataDescriptor_64 {
uint64_t _buffer;
uint32_t _muts;
uint32_t _used : 25;
uint32_t _kvo : 1;
uint32_t _szidx : 6;
uint64_t GetSize() {
return (_szidx) >= NSDictionaryNumSizeBuckets ?
0 : NSDictionaryCapacities[_szidx];
}
};
}
using NSDictionaryMSyntheticFrontEnd =
GenericNSDictionaryMSyntheticFrontEnd<DataDescriptor_32, DataDescriptor_64>;
template <typename DD>
uint64_t
__NSDictionaryMSize_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
__NSDictionaryMSize(lldb_private::Process &process, lldb::addr_t valobj_addr,
Status &error) {
if (process.GetAddressByteSize() == 4) {
return __NSDictionaryMSize_Impl<DataDescriptor_32>(process, valobj_addr,
error);
} else {
return __NSDictionaryMSize_Impl<DataDescriptor_64>(process, valobj_addr,
error);
}
}
}
} // namespace formatters
} // namespace lldb_private
template <bool name_entries>
bool lldb_private::formatters::NSDictionarySummaryProvider(
ValueObject &valobj, Stream &stream, const TypeSummaryOptions &options) {
static ConstString g_TypeHint("NSDictionary");
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();
bool is_64bit = (ptr_size == 8);
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_DictionaryI("__NSDictionaryI");
static const ConstString g_DictionaryM("__NSDictionaryM");
static const ConstString g_DictionaryMLegacy("__NSDictionaryM_Legacy");
static const ConstString g_DictionaryMImmutable("__NSDictionaryM_Immutable");
static const ConstString g_Dictionary1("__NSSingleEntryDictionaryI");
static const ConstString g_Dictionary0("__NSDictionary0");
static const ConstString g_DictionaryCF("__CFDictionary");
static const ConstString g_DictionaryNSCF("__NSCFDictionary");
static const ConstString g_DictionaryCFRef("CFDictionaryRef");
if (class_name.IsEmpty())
return false;
if (class_name == g_DictionaryI || class_name == g_DictionaryMImmutable) {
Status error;
value = process_sp->ReadUnsignedIntegerFromMemory(valobj_addr + ptr_size,
ptr_size, 0, error);
if (error.Fail())
return false;
value &= (is_64bit ? ~0xFC00000000000000UL : ~0xFC000000U);
} else if (class_name == g_DictionaryM || class_name == g_DictionaryMLegacy) {
AppleObjCRuntime *apple_runtime =
llvm::dyn_cast_or_null<AppleObjCRuntime>(runtime);
Status error;
if (apple_runtime && apple_runtime->GetFoundationVersion() >= 1437) {
value = Foundation1437::__NSDictionaryMSize(*process_sp, valobj_addr,
error);
} else {
value = process_sp->ReadUnsignedIntegerFromMemory(valobj_addr + ptr_size,
ptr_size, 0, error);
value &= (is_64bit ? ~0xFC00000000000000UL : ~0xFC000000U);
}
if (error.Fail())
return false;
} else if (class_name == g_Dictionary1) {
value = 1;
} else if (class_name == g_Dictionary0) {
value = 0;
} else if (class_name == g_DictionaryCF ||
class_name == g_DictionaryNSCF ||
class_name == g_DictionaryCFRef) {
ExecutionContext exe_ctx(process_sp);
CFBasicHash cfbh;
if (!cfbh.Update(valobj_addr, exe_ctx))
return false;
value = cfbh.GetCount();
} else {
auto &map(NSDictionary_Additionals::GetAdditionalSummaries());
for (auto &candidate : map) {
if (candidate.first && candidate.first->Match(class_name))
return candidate.second(valobj, stream, options);
}
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, "key/value pair",
value == 1 ? "" : "s", suffix.c_str());
return true;
}
SyntheticChildrenFrontEnd *
lldb_private::formatters::NSDictionarySyntheticFrontEndCreator(
CXXSyntheticChildren *synth, lldb::ValueObjectSP valobj_sp) {
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_DictionaryI("__NSDictionaryI");
static const ConstString g_DictionaryM("__NSDictionaryM");
static const ConstString g_Dictionary1("__NSSingleEntryDictionaryI");
static const ConstString g_DictionaryImmutable("__NSDictionaryM_Immutable");
static const ConstString g_DictionaryMLegacy("__NSDictionaryM_Legacy");
static const ConstString g_Dictionary0("__NSDictionary0");
static const ConstString g_DictionaryCF("__CFDictionary");
static const ConstString g_DictionaryNSCF("__NSCFDictionary");
static const ConstString g_DictionaryCFRef("CFDictionaryRef");
if (class_name.IsEmpty())
return nullptr;
if (class_name == g_DictionaryI) {
return (new NSDictionaryISyntheticFrontEnd(valobj_sp));
} else if (class_name == g_DictionaryM) {
if (runtime->GetFoundationVersion() >= 1437) {
return (new Foundation1437::NSDictionaryMSyntheticFrontEnd(valobj_sp));
} else if (runtime->GetFoundationVersion() >= 1428) {
return (new Foundation1428::NSDictionaryMSyntheticFrontEnd(valobj_sp));
} else {
return (new Foundation1100::NSDictionaryMSyntheticFrontEnd(valobj_sp));
}
} else if (class_name == g_DictionaryMLegacy) {
return (new Foundation1100::NSDictionaryMSyntheticFrontEnd(valobj_sp));
} else if (class_name == g_Dictionary1) {
return (new NSDictionary1SyntheticFrontEnd(valobj_sp));
} else if (class_name == g_DictionaryCF ||
class_name == g_DictionaryNSCF ||
class_name == g_DictionaryCFRef) {
return (new NSCFDictionarySyntheticFrontEnd(valobj_sp));
} else {
auto &map(NSDictionary_Additionals::GetAdditionalSynthetics());
for (auto &candidate : map) {
if (candidate.first && candidate.first->Match((class_name)))
return candidate.second(synth, valobj_sp);
}
}
return nullptr;
}
lldb_private::formatters::NSDictionaryISyntheticFrontEnd::
NSDictionaryISyntheticFrontEnd(lldb::ValueObjectSP valobj_sp)
: SyntheticChildrenFrontEnd(*valobj_sp), m_exe_ctx_ref(), m_ptr_size(8),
m_order(lldb::eByteOrderInvalid), m_data_32(nullptr), m_data_64(nullptr),
m_pair_type() {}
lldb_private::formatters::NSDictionaryISyntheticFrontEnd::
~NSDictionaryISyntheticFrontEnd() {
delete m_data_32;
m_data_32 = nullptr;
delete m_data_64;
m_data_64 = nullptr;
}
size_t lldb_private::formatters::NSDictionaryISyntheticFrontEnd::
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;
}
size_t lldb_private::formatters::NSDictionaryISyntheticFrontEnd::
CalculateNumChildren() {
if (!m_data_32 && !m_data_64)
return 0;
return (m_data_32 ? m_data_32->_used : m_data_64->_used);
}
bool lldb_private::formatters::NSDictionaryISyntheticFrontEnd::Update() {
m_children.clear();
delete m_data_32;
m_data_32 = nullptr;
delete m_data_64;
m_data_64 = nullptr;
m_ptr_size = 0;
ValueObjectSP valobj_sp = m_backend.GetSP();
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();
m_order = process_sp->GetByteOrder();
uint64_t data_location = valobj_sp->GetValueAsUnsigned(0) + m_ptr_size;
if (m_ptr_size == 4) {
m_data_32 = new DataDescriptor_32();
process_sp->ReadMemory(data_location, m_data_32, sizeof(DataDescriptor_32),
error);
} else {
m_data_64 = new DataDescriptor_64();
process_sp->ReadMemory(data_location, m_data_64, sizeof(DataDescriptor_64),
error);
}
if (error.Fail())
return false;
m_data_ptr = data_location + m_ptr_size;
return false;
}
bool lldb_private::formatters::NSDictionaryISyntheticFrontEnd::
MightHaveChildren() {
return true;
}
lldb::ValueObjectSP
lldb_private::formatters::NSDictionaryISyntheticFrontEnd::GetChildAtIndex(
size_t idx) {
uint32_t num_children = CalculateNumChildren();
if (idx >= num_children)
return lldb::ValueObjectSP();
if (m_children.empty()) {
// do the scan phase
lldb::addr_t key_at_idx = 0, val_at_idx = 0;
uint32_t tries = 0;
uint32_t test_idx = 0;
while (tries < num_children) {
key_at_idx = m_data_ptr + (2 * test_idx * m_ptr_size);
val_at_idx = key_at_idx + m_ptr_size;
ProcessSP process_sp = m_exe_ctx_ref.GetProcessSP();
if (!process_sp)
return lldb::ValueObjectSP();
Status error;
key_at_idx = process_sp->ReadPointerFromMemory(key_at_idx, error);
if (error.Fail())
return lldb::ValueObjectSP();
val_at_idx = process_sp->ReadPointerFromMemory(val_at_idx, error);
if (error.Fail())
return lldb::ValueObjectSP();
test_idx++;
if (!key_at_idx || !val_at_idx)
continue;
tries++;
DictionaryItemDescriptor descriptor = {key_at_idx, val_at_idx,
lldb::ValueObjectSP()};
m_children.push_back(descriptor);
}
}
if (idx >= m_children.size()) // should never happen
return lldb::ValueObjectSP();
DictionaryItemDescriptor &dict_item = m_children[idx];
if (!dict_item.valobj_sp) {
if (!m_pair_type.IsValid()) {
TargetSP target_sp(m_backend.GetTargetSP());
if (!target_sp)
return ValueObjectSP();
m_pair_type = GetLLDBNSPairType(target_sp);
}
if (!m_pair_type.IsValid())
return ValueObjectSP();
DataBufferSP buffer_sp(new DataBufferHeap(2 * m_ptr_size, 0));
if (m_ptr_size == 8) {
uint64_t *data_ptr = (uint64_t *)buffer_sp->GetBytes();
*data_ptr = dict_item.key_ptr;
*(data_ptr + 1) = dict_item.val_ptr;
} else {
uint32_t *data_ptr = (uint32_t *)buffer_sp->GetBytes();
*data_ptr = dict_item.key_ptr;
*(data_ptr + 1) = dict_item.val_ptr;
}
StreamString idx_name;
idx_name.Printf("[%" PRIu64 "]", (uint64_t)idx);
DataExtractor data(buffer_sp, m_order, m_ptr_size);
dict_item.valobj_sp = CreateValueObjectFromData(idx_name.GetString(), data,
m_exe_ctx_ref, m_pair_type);
}
return dict_item.valobj_sp;
}
lldb_private::formatters::NSCFDictionarySyntheticFrontEnd::
NSCFDictionarySyntheticFrontEnd(lldb::ValueObjectSP valobj_sp)
: SyntheticChildrenFrontEnd(*valobj_sp), m_exe_ctx_ref(), m_ptr_size(8),
m_order(lldb::eByteOrderInvalid), m_hashtable(), m_pair_type() {}
size_t lldb_private::formatters::NSCFDictionarySyntheticFrontEnd::
GetIndexOfChildWithName(ConstString name) {
const char *item_name = name.GetCString();
const uint32_t idx = ExtractIndexFromString(item_name);
if (idx < UINT32_MAX && idx >= CalculateNumChildren())
return UINT32_MAX;
return idx;
}
size_t lldb_private::formatters::NSCFDictionarySyntheticFrontEnd::
CalculateNumChildren() {
if (!m_hashtable.IsValid())
return 0;
return m_hashtable.GetCount();
}
bool lldb_private::formatters::NSCFDictionarySyntheticFrontEnd::Update() {
m_children.clear();
ValueObjectSP valobj_sp = m_backend.GetSP();
m_ptr_size = 0;
if (!valobj_sp)
return false;
m_exe_ctx_ref = valobj_sp->GetExecutionContextRef();
lldb::ProcessSP process_sp(valobj_sp->GetProcessSP());
if (!process_sp)
return false;
m_ptr_size = process_sp->GetAddressByteSize();
m_order = process_sp->GetByteOrder();
return m_hashtable.Update(valobj_sp->GetValueAsUnsigned(0), m_exe_ctx_ref);
}
bool lldb_private::formatters::NSCFDictionarySyntheticFrontEnd::
MightHaveChildren() {
return true;
}
lldb::ValueObjectSP
lldb_private::formatters::NSCFDictionarySyntheticFrontEnd::GetChildAtIndex(
size_t idx) {
lldb::addr_t m_keys_ptr = m_hashtable.GetKeyPointer();
lldb::addr_t m_values_ptr = m_hashtable.GetValuePointer();
const uint32_t num_children = CalculateNumChildren();
if (idx >= num_children)
return lldb::ValueObjectSP();
if (m_children.empty()) {
ProcessSP process_sp = m_exe_ctx_ref.GetProcessSP();
if (!process_sp)
return lldb::ValueObjectSP();
Status error;
lldb::addr_t key_at_idx = 0, val_at_idx = 0;
uint32_t tries = 0;
uint32_t test_idx = 0;
// Iterate over inferior memory, reading key/value pointers by shifting each
// cursor by test_index * m_ptr_size. Returns an empty ValueObject if a read
// fails, otherwise, continue until the number of tries matches the number
// of childen.
while (tries < num_children) {
key_at_idx = m_keys_ptr + (test_idx * m_ptr_size);
val_at_idx = m_values_ptr + (test_idx * m_ptr_size);
key_at_idx = process_sp->ReadPointerFromMemory(key_at_idx, error);
if (error.Fail())
return lldb::ValueObjectSP();
val_at_idx = process_sp->ReadPointerFromMemory(val_at_idx, error);
if (error.Fail())
return lldb::ValueObjectSP();
test_idx++;
if (!key_at_idx || !val_at_idx)
continue;
tries++;
DictionaryItemDescriptor descriptor = {key_at_idx, val_at_idx,
lldb::ValueObjectSP()};
m_children.push_back(descriptor);
}
}
if (idx >= m_children.size()) // should never happen
return lldb::ValueObjectSP();
DictionaryItemDescriptor &dict_item = m_children[idx];
if (!dict_item.valobj_sp) {
if (!m_pair_type.IsValid()) {
TargetSP target_sp(m_backend.GetTargetSP());
if (!target_sp)
return ValueObjectSP();
m_pair_type = GetLLDBNSPairType(target_sp);
}
if (!m_pair_type.IsValid())
return ValueObjectSP();
DataBufferSP buffer_sp(new DataBufferHeap(2 * m_ptr_size, 0));
switch (m_ptr_size) {
case 0: // architecture has no clue - fail
return lldb::ValueObjectSP();
case 4: {
uint32_t *data_ptr = reinterpret_cast<uint32_t *>(buffer_sp->GetBytes());
*data_ptr = dict_item.key_ptr;
*(data_ptr + 1) = dict_item.val_ptr;
} break;
case 8: {
uint64_t *data_ptr = reinterpret_cast<uint64_t *>(buffer_sp->GetBytes());
*data_ptr = dict_item.key_ptr;
*(data_ptr + 1) = dict_item.val_ptr;
} break;
default:
lldbassert(false && "pointer size is not 4 nor 8");
}
StreamString idx_name;
idx_name.Printf("[%" PRIu64 "]", (uint64_t)idx);
DataExtractor data(buffer_sp, m_order, m_ptr_size);
dict_item.valobj_sp = CreateValueObjectFromData(idx_name.GetString(), data,
m_exe_ctx_ref, m_pair_type);
}
return dict_item.valobj_sp;
}
lldb_private::formatters::NSDictionary1SyntheticFrontEnd::
NSDictionary1SyntheticFrontEnd(lldb::ValueObjectSP valobj_sp)
: SyntheticChildrenFrontEnd(*valobj_sp.get()), m_pair(nullptr) {}
size_t lldb_private::formatters::NSDictionary1SyntheticFrontEnd::
GetIndexOfChildWithName(ConstString name) {
static const ConstString g_zero("[0]");
return name == g_zero ? 0 : UINT32_MAX;
}
size_t lldb_private::formatters::NSDictionary1SyntheticFrontEnd::
CalculateNumChildren() {
return 1;
}
bool lldb_private::formatters::NSDictionary1SyntheticFrontEnd::Update() {
m_pair.reset();
return false;
}
bool lldb_private::formatters::NSDictionary1SyntheticFrontEnd::
MightHaveChildren() {
return true;
}
lldb::ValueObjectSP
lldb_private::formatters::NSDictionary1SyntheticFrontEnd::GetChildAtIndex(
size_t idx) {
if (idx != 0)
return lldb::ValueObjectSP();
if (m_pair.get())
return m_pair;
auto process_sp(m_backend.GetProcessSP());
if (!process_sp)
return nullptr;
auto ptr_size = process_sp->GetAddressByteSize();
lldb::addr_t key_ptr =
m_backend.GetValueAsUnsigned(LLDB_INVALID_ADDRESS) + ptr_size;
lldb::addr_t value_ptr = key_ptr + ptr_size;
Status error;
lldb::addr_t value_at_idx = process_sp->ReadPointerFromMemory(key_ptr, error);
if (error.Fail())
return nullptr;
lldb::addr_t key_at_idx = process_sp->ReadPointerFromMemory(value_ptr, error);
if (error.Fail())
return nullptr;
auto pair_type =
GetLLDBNSPairType(process_sp->GetTarget().shared_from_this());
DataBufferSP buffer_sp(new DataBufferHeap(2 * ptr_size, 0));
if (ptr_size == 8) {
uint64_t *data_ptr = (uint64_t *)buffer_sp->GetBytes();
*data_ptr = key_at_idx;
*(data_ptr + 1) = value_at_idx;
} else {
uint32_t *data_ptr = (uint32_t *)buffer_sp->GetBytes();
*data_ptr = key_at_idx;
*(data_ptr + 1) = value_at_idx;
}
DataExtractor data(buffer_sp, process_sp->GetByteOrder(), ptr_size);
m_pair = CreateValueObjectFromData(
"[0]", data, m_backend.GetExecutionContextRef(), pair_type);
return m_pair;
}
template <typename D32, typename D64>
lldb_private::formatters::GenericNSDictionaryMSyntheticFrontEnd<D32,D64>::
GenericNSDictionaryMSyntheticFrontEnd(lldb::ValueObjectSP valobj_sp)
: SyntheticChildrenFrontEnd(*valobj_sp), m_exe_ctx_ref(), m_ptr_size(8),
m_order(lldb::eByteOrderInvalid), m_data_32(nullptr), m_data_64(nullptr),
m_pair_type() {}
template <typename D32, typename D64>
lldb_private::formatters::GenericNSDictionaryMSyntheticFrontEnd<D32,D64>::
~GenericNSDictionaryMSyntheticFrontEnd<D32,D64>() {
delete m_data_32;
m_data_32 = nullptr;
delete m_data_64;
m_data_64 = nullptr;
}
template <typename D32, typename D64>
size_t lldb_private::formatters::GenericNSDictionaryMSyntheticFrontEnd<
D32, D64>::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>
size_t
lldb_private::formatters::GenericNSDictionaryMSyntheticFrontEnd<D32,D64>::CalculateNumChildren() {
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>
bool
lldb_private::formatters::GenericNSDictionaryMSyntheticFrontEnd<D32,D64>::
Update() {
m_children.clear();
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();
m_order = process_sp->GetByteOrder();
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 true;
}
template <typename D32, typename D64>
bool
lldb_private::formatters::GenericNSDictionaryMSyntheticFrontEnd<D32,D64>::
MightHaveChildren() {
return true;
}
template <typename D32, typename D64>
lldb::ValueObjectSP
lldb_private::formatters::GenericNSDictionaryMSyntheticFrontEnd<
D32, D64>::GetChildAtIndex(size_t idx) {
lldb::addr_t m_keys_ptr;
lldb::addr_t m_values_ptr;
if (m_data_32) {
uint32_t size = m_data_32->GetSize();
m_keys_ptr = m_data_32->_buffer;
m_values_ptr = m_data_32->_buffer + (m_ptr_size * size);
} else {
uint32_t size = m_data_64->GetSize();
m_keys_ptr = m_data_64->_buffer;
m_values_ptr = m_data_64->_buffer + (m_ptr_size * size);
}
uint32_t num_children = CalculateNumChildren();
if (idx >= num_children)
return lldb::ValueObjectSP();