diff --git a/lldb/include/lldb/Core/ValueObject.h b/lldb/include/lldb/Core/ValueObject.h --- a/lldb/include/lldb/Core/ValueObject.h +++ b/lldb/include/lldb/Core/ValueObject.h @@ -420,7 +420,9 @@ return (GetBitfieldBitSize() != 0) || (GetBitfieldBitOffset() != 0); } - virtual bool IsArrayItemForPointer() { return m_is_array_item_for_pointer; } + virtual bool IsArrayItemForPointer() { + return m_flags.m_is_array_item_for_pointer; + } virtual const char *GetValueAsCString(); @@ -744,7 +746,9 @@ AddressType GetAddressTypeOfChildren(); - void SetHasCompleteType() { m_did_calculate_complete_objc_class_type = true; } + void SetHasCompleteType() { + m_flags.m_did_calculate_complete_objc_class_type = true; + } /// Find out if a ValueObject might have children. /// @@ -815,76 +819,95 @@ }; // Classes that inherit from ValueObject can see and modify these - ValueObject - *m_parent; // The parent value object, or nullptr if this has no parent - ValueObject *m_root; // The root of the hierarchy for this ValueObject (or - // nullptr if never calculated) - EvaluationPoint m_update_point; // Stores both the stop id and the full - // context at which this value was last - // updated. When we are asked to update the value object, we check whether - // the context & stop id are the same before updating. - ConstString m_name; // The name of this object - DataExtractor - m_data; // A data extractor that can be used to extract the value. + + /// The parent value object, or nullptr if this has no parent. + ValueObject *m_parent = nullptr; + /// The root of the hierarchy for this ValueObject (or nullptr if never + /// calculated). + ValueObject *m_root = nullptr; + /// Stores both the stop id and the full context at which this value was last + /// updated. When we are asked to update the value object, we check whether + /// the context & stop id are the same before updating. + EvaluationPoint m_update_point; + /// The name of this object. + ConstString m_name; + /// A data extractor that can be used to extract the value. + DataExtractor m_data; Value m_value; - Status - m_error; // An error object that can describe any errors that occur when - // updating values. - std::string m_value_str; // Cached value string that will get cleared if/when - // the value is updated. - std::string m_old_value_str; // Cached old value string from the last time the - // value was gotten - std::string m_location_str; // Cached location string that will get cleared - // if/when the value is updated. - std::string m_summary_str; // Cached summary string that will get cleared - // if/when the value is updated. - std::string m_object_desc_str; // Cached result of the "object printer". This - // differs from the summary - // in that the summary is consed up by us, the object_desc_string is builtin. - - CompilerType m_override_type; // If the type of the value object should be - // overridden, the type to impose. - - ValueObjectManager *m_manager; // This object is managed by the root object - // (any ValueObject that gets created - // without a parent.) The manager gets passed through all the generations of - // dependent objects, and will keep the whole cluster of objects alive as - // long as a shared pointer to any of them has been handed out. Shared - // pointers to value objects must always be made with the GetSP method. + /// An error object that can describe any errors that occur when updating + /// values. + Status m_error; + /// Cached value string that will get cleared if/when the value is updated. + std::string m_value_str; + /// Cached old value string from the last time the value was gotten + std::string m_old_value_str; + /// Cached location string that will get cleared if/when the value is updated. + std::string m_location_str; + /// Cached summary string that will get cleared if/when the value is updated. + std::string m_summary_str; + /// Cached result of the "object printer". This differs from the summary + /// in that the summary is consed up by us, the object_desc_string is builtin. + std::string m_object_desc_str; + /// If the type of the value object should be overridden, the type to impose. + CompilerType m_override_type; + + /// This object is managed by the root object (any ValueObject that gets + /// created without a parent.) The manager gets passed through all the + /// generations of dependent objects, and will keep the whole cluster of + /// objects alive as long as a shared pointer to any of them has been handed + /// out. Shared pointers to value objects must always be made with the GetSP + /// method. + ValueObjectManager *m_manager = nullptr; ChildrenManager m_children; std::map m_synthetic_children; - ValueObject *m_dynamic_value; - ValueObject *m_synthetic_value; - ValueObject *m_deref_valobj; + ValueObject *m_dynamic_value = nullptr; + ValueObject *m_synthetic_value = nullptr; + ValueObject *m_deref_valobj = nullptr; - lldb::ValueObjectSP m_addr_of_valobj_sp; // We have to hold onto a shared - // pointer to this one because it is - // created - // as an independent ValueObjectConstResult, which isn't managed by us. + /// We have to hold onto a shared pointer to this one because it is created + /// as an independent ValueObjectConstResult, which isn't managed by us. + lldb::ValueObjectSP m_addr_of_valobj_sp; - lldb::Format m_format; - lldb::Format m_last_format; - uint32_t m_last_format_mgr_revision; + lldb::Format m_format = lldb::eFormatDefault; + lldb::Format m_last_format = lldb::eFormatDefault; + uint32_t m_last_format_mgr_revision = 0; lldb::TypeSummaryImplSP m_type_summary_sp; lldb::TypeFormatImplSP m_type_format_sp; lldb::SyntheticChildrenSP m_synthetic_children_sp; ProcessModID m_user_id_of_forced_summary; - AddressType m_address_type_of_ptr_or_ref_children; + AddressType m_address_type_of_ptr_or_ref_children = eAddressTypeInvalid; llvm::SmallVector m_value_checksum; - lldb::LanguageType m_preferred_display_language; - - uint64_t m_language_flags; - - bool m_value_is_valid : 1, m_value_did_change : 1, m_children_count_valid : 1, - m_old_value_valid : 1, m_is_deref_of_parent : 1, - m_is_array_item_for_pointer : 1, m_is_bitfield_for_scalar : 1, - m_is_child_at_offset : 1, m_is_getting_summary : 1, - m_did_calculate_complete_objc_class_type : 1, - m_is_synthetic_children_generated : 1; + lldb::LanguageType m_preferred_display_language = lldb::eLanguageTypeUnknown; + + uint64_t m_language_flags = 0; + + // Utility class for initializing all bitfields in ValueObject's constructors. + // FIXME: This could be done via default initializers once we have C++20. + struct Bitflags { + bool m_value_is_valid : 1, m_value_did_change : 1, + m_children_count_valid : 1, m_old_value_valid : 1, + m_is_deref_of_parent : 1, m_is_array_item_for_pointer : 1, + m_is_bitfield_for_scalar : 1, m_is_child_at_offset : 1, + m_is_getting_summary : 1, m_did_calculate_complete_objc_class_type : 1, + m_is_synthetic_children_generated : 1; + Bitflags() { + m_value_is_valid = false; + m_value_did_change = false; + m_children_count_valid = false; + m_old_value_valid = false; + m_is_deref_of_parent = false; + m_is_array_item_for_pointer = false; + m_is_bitfield_for_scalar = false; + m_is_child_at_offset = false; + m_is_getting_summary = false; + m_did_calculate_complete_objc_class_type = false; + m_is_synthetic_children_generated = false; + } + } m_flags; friend class ValueObjectChild; friend class ExpressionVariable; // For SetName @@ -892,22 +915,13 @@ friend class ValueObjectConstResultImpl; friend class ValueObjectSynthetic; // For ClearUserVisibleData - // Constructors and Destructors - - // Use the no-argument constructor to make a constant variable object (with - // no ExecutionContextScope.) - - ValueObject(); - - // Use this constructor to create a "root variable object". The ValueObject - // will be locked to this context through-out its lifespan. - + /// Use this constructor to create a "root variable object". The ValueObject + /// will be locked to this context through-out its lifespan. ValueObject(ExecutionContextScope *exe_scope, ValueObjectManager &manager, AddressType child_ptr_or_ref_addr_type = eAddressTypeLoad); - // Use this constructor to create a ValueObject owned by another ValueObject. - // It will inherit the ExecutionContext of its parent. - + /// Use this constructor to create a ValueObject owned by another ValueObject. + /// It will inherit the ExecutionContext of its parent. ValueObject(ValueObject &parent); ValueObjectManager *GetManager() { return m_manager; } diff --git a/lldb/source/Core/ValueObject.cpp b/lldb/source/Core/ValueObject.cpp --- a/lldb/source/Core/ValueObject.cpp +++ b/lldb/source/Core/ValueObject.cpp @@ -77,26 +77,10 @@ // ValueObject constructor ValueObject::ValueObject(ValueObject &parent) : UserID(++g_value_obj_uid), // Unique identifier for every value object - m_parent(&parent), m_root(nullptr), - m_update_point(parent.GetUpdatePoint()), m_name(), m_data(), m_value(), - m_error(), m_value_str(), m_old_value_str(), m_location_str(), - m_summary_str(), m_object_desc_str(), m_manager(parent.GetManager()), - m_children(), m_synthetic_children(), m_dynamic_value(nullptr), - m_synthetic_value(nullptr), m_deref_valobj(nullptr), - m_format(eFormatDefault), m_last_format(eFormatDefault), - m_last_format_mgr_revision(0), m_type_summary_sp(), m_type_format_sp(), - m_synthetic_children_sp(), m_user_id_of_forced_summary(), - m_address_type_of_ptr_or_ref_children(eAddressTypeInvalid), - m_value_checksum(), - m_preferred_display_language(lldb::eLanguageTypeUnknown), - m_language_flags(0), m_value_is_valid(false), m_value_did_change(false), - m_children_count_valid(false), m_old_value_valid(false), - m_is_deref_of_parent(false), m_is_array_item_for_pointer(false), - m_is_bitfield_for_scalar(false), m_is_child_at_offset(false), - m_is_getting_summary(false), - m_did_calculate_complete_objc_class_type(false), - m_is_synthetic_children_generated( - parent.m_is_synthetic_children_generated) { + m_parent(&parent), m_update_point(parent.GetUpdatePoint()), + m_manager(parent.GetManager()) { + m_flags.m_is_synthetic_children_generated = + parent.m_flags.m_is_synthetic_children_generated; m_data.SetByteOrder(parent.GetDataExtractor().GetByteOrder()); m_data.SetAddressByteSize(parent.GetDataExtractor().GetAddressByteSize()); m_manager->ManageObject(this); @@ -107,25 +91,8 @@ ValueObjectManager &manager, AddressType child_ptr_or_ref_addr_type) : UserID(++g_value_obj_uid), // Unique identifier for every value object - m_parent(nullptr), m_root(nullptr), m_update_point(exe_scope), m_name(), - m_data(), m_value(), m_error(), m_value_str(), m_old_value_str(), - m_location_str(), m_summary_str(), m_object_desc_str(), - m_manager(&manager), m_children(), m_synthetic_children(), - m_dynamic_value(nullptr), m_synthetic_value(nullptr), - m_deref_valobj(nullptr), m_format(eFormatDefault), - m_last_format(eFormatDefault), m_last_format_mgr_revision(0), - m_type_summary_sp(), m_type_format_sp(), m_synthetic_children_sp(), - m_user_id_of_forced_summary(), - m_address_type_of_ptr_or_ref_children(child_ptr_or_ref_addr_type), - m_value_checksum(), - m_preferred_display_language(lldb::eLanguageTypeUnknown), - m_language_flags(0), m_value_is_valid(false), m_value_did_change(false), - m_children_count_valid(false), m_old_value_valid(false), - m_is_deref_of_parent(false), m_is_array_item_for_pointer(false), - m_is_bitfield_for_scalar(false), m_is_child_at_offset(false), - m_is_getting_summary(false), - m_did_calculate_complete_objc_class_type(false), - m_is_synthetic_children_generated(false) { + m_update_point(exe_scope), m_manager(&manager), + m_address_type_of_ptr_or_ref_children(child_ptr_or_ref_addr_type) { if (exe_scope) { TargetSP target_sp(exe_scope->CalculateTarget()); if (target_sp) { @@ -170,9 +137,9 @@ // Save the old value using swap to avoid a string copy which also will // clear our m_value_str if (m_value_str.empty()) { - m_old_value_valid = false; + m_flags.m_old_value_valid = false; } else { - m_old_value_valid = true; + m_flags.m_old_value_valid = true; m_old_value_str.swap(m_value_str); ClearUserVisibleData(eClearUserVisibleDataItemsValue); } @@ -215,7 +182,7 @@ if (first_update) SetValueDidChange(false); - else if (!m_value_did_change && !success) { + else if (!m_flags.m_value_did_change && !success) { // The value wasn't gotten successfully, so we mark this as changed if // the value used to be valid and now isn't SetValueDidChange(value_was_valid); @@ -266,8 +233,8 @@ } void ValueObject::ClearDynamicTypeInformation() { - m_children_count_valid = false; - m_did_calculate_complete_objc_class_type = false; + m_flags.m_children_count_valid = false; + m_flags.m_did_calculate_complete_objc_class_type = false; m_last_format_mgr_revision = 0; m_override_type = CompilerType(); SetValueFormat(lldb::TypeFormatImplSP()); @@ -278,14 +245,14 @@ CompilerType ValueObject::MaybeCalculateCompleteType() { CompilerType compiler_type(GetCompilerTypeImpl()); - if (m_did_calculate_complete_objc_class_type) { + if (m_flags.m_did_calculate_complete_objc_class_type) { if (m_override_type.IsValid()) return m_override_type; else return compiler_type; } - m_did_calculate_complete_objc_class_type = true; + m_flags.m_did_calculate_complete_objc_class_type = true; ProcessSP process_sp( GetUpdatePoint().GetExecutionContextRef().GetProcessSP()); @@ -418,14 +385,14 @@ return ret; } -bool ValueObject::GetValueIsValid() const { return m_value_is_valid; } +bool ValueObject::GetValueIsValid() const { return m_flags.m_value_is_valid; } -void ValueObject::SetValueIsValid(bool b) { m_value_is_valid = b; } +void ValueObject::SetValueIsValid(bool b) { m_flags.m_value_is_valid = b; } -bool ValueObject::GetValueDidChange() { return m_value_did_change; } +bool ValueObject::GetValueDidChange() { return m_flags.m_value_did_change; } void ValueObject::SetValueDidChange(bool value_changed) { - m_value_did_change = value_changed; + m_flags.m_value_did_change = value_changed; } ValueObjectSP ValueObject::GetChildAtIndex(size_t idx, bool can_create) { @@ -553,14 +520,14 @@ UpdateValueIfNeeded(); if (max < UINT32_MAX) { - if (m_children_count_valid) { + if (m_flags.m_children_count_valid) { size_t children_count = m_children.GetChildrenCount(); return children_count <= max ? children_count : max; } else return CalculateNumChildren(max); } - if (!m_children_count_valid) { + if (!m_flags.m_children_count_valid) { SetNumChildren(CalculateNumChildren()); } return m_children.GetChildrenCount(); @@ -580,7 +547,7 @@ // Should only be called by ValueObject::GetNumChildren() void ValueObject::SetNumChildren(size_t num_children) { - m_children_count_valid = true; + m_flags.m_children_count_valid = true; m_children.SetChildrenCount(num_children); } @@ -654,10 +621,10 @@ // ideally we would like to bail out if passing NULL, but if we do so we end // up not providing the summary for function pointers anymore - if (/*summary_ptr == NULL ||*/ m_is_getting_summary) + if (/*summary_ptr == NULL ||*/ m_flags.m_is_getting_summary) return false; - m_is_getting_summary = true; + m_flags.m_is_getting_summary = true; TypeSummaryOptions actual_options(options); @@ -680,7 +647,7 @@ // up-to-date (e.g. ${svar%#}) summary_ptr->FormatObject(this, destination, actual_options); } - m_is_getting_summary = false; + m_flags.m_is_getting_summary = false; return !destination.empty(); } @@ -1110,7 +1077,7 @@ if (m_type_format_sp) format_sp = m_type_format_sp; else { - if (m_is_bitfield_for_scalar) + if (m_flags.m_is_bitfield_for_scalar) my_format = eFormatUnsigned; else { if (m_value.GetContextType() == Value::ContextType::RegisterInfo) { @@ -1128,7 +1095,7 @@ if (!format_sp) format_sp = std::make_shared(my_format); if (GetValueAsCString(*format_sp.get(), m_value_str)) { - if (!m_value_did_change && m_old_value_valid) { + if (!m_flags.m_value_did_change && m_flags.m_old_value_valid) { // The value was gotten successfully, so we consider the value as // changed if the value string differs SetValueDidChange(m_old_value_str != m_value_str); @@ -1725,7 +1692,7 @@ AddSyntheticChild(index_const_str, synthetic_child); synthetic_child_sp = synthetic_child->GetSP(); synthetic_child_sp->SetName(ConstString(index_str)); - synthetic_child_sp->m_is_array_item_for_pointer = true; + synthetic_child_sp->m_flags.m_is_array_item_for_pointer = true; } } } @@ -1759,7 +1726,7 @@ AddSyntheticChild(index_const_str, synthetic_child); synthetic_child_sp = synthetic_child->GetSP(); synthetic_child_sp->SetName(ConstString(index_str)); - synthetic_child_sp->m_is_bitfield_for_scalar = true; + synthetic_child_sp->m_flags.m_is_bitfield_for_scalar = true; } } } @@ -1798,7 +1765,7 @@ AddSyntheticChild(name_const_str, synthetic_child); synthetic_child_sp = synthetic_child->GetSP(); synthetic_child_sp->SetName(name_const_str); - synthetic_child_sp->m_is_child_at_offset = true; + synthetic_child_sp->m_flags.m_is_child_at_offset = true; } return synthetic_child_sp; } @@ -1990,7 +1957,7 @@ // sometimes they are consed up in ways that don't make sense from an // underlying language/API standpoint. So, use a special code path here to // return something that can hopefully be used in expression - if (m_is_synthetic_children_generated) { + if (m_flags.m_is_synthetic_children_generated) { UpdateValueIfNeeded(); if (m_value.GetValueType() == Value::ValueType::LoadAddress) { @@ -2038,7 +2005,7 @@ // if we are a deref_of_parent just because we are synthetic array members // made up to allow ptr[%d] syntax to work in variable printing, then add our // name ([%d]) to the expression path - if (m_is_array_item_for_pointer && + if (m_flags.m_is_array_item_for_pointer && epformat == eGetExpressionPathFormatHonorPointers) s.PutCString(m_name.GetStringRef()); @@ -3253,11 +3220,11 @@ } bool ValueObject::IsSyntheticChildrenGenerated() { - return m_is_synthetic_children_generated; + return m_flags.m_is_synthetic_children_generated; } void ValueObject::SetSyntheticChildrenGenerated(bool b) { - m_is_synthetic_children_generated = b; + m_flags.m_is_synthetic_children_generated = b; } uint64_t ValueObject::GetLanguageFlags() { return m_language_flags; } diff --git a/lldb/source/Core/ValueObjectSyntheticFilter.cpp b/lldb/source/Core/ValueObjectSyntheticFilter.cpp --- a/lldb/source/Core/ValueObjectSyntheticFilter.cpp +++ b/lldb/source/Core/ValueObjectSyntheticFilter.cpp @@ -190,7 +190,7 @@ // children count for a synthetic VO that might indeed happen, so we need // to tell the upper echelons that they need to come back to us asking for // children - m_children_count_valid = false; + m_flags.m_children_count_valid = false; { std::lock_guard guard(m_child_mutex); m_synthetic_children_cache.clear();