| //===-- LibCxxInitializerList.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 "LibCxx.h" |
| |
| #include "lldb/Core/ValueObject.h" |
| #include "lldb/DataFormatters/FormattersHelpers.h" |
| #include "lldb/Utility/ConstString.h" |
| |
| using namespace lldb; |
| using namespace lldb_private; |
| using namespace lldb_private::formatters; |
| |
| namespace lldb_private { |
| namespace formatters { |
| class LibcxxInitializerListSyntheticFrontEnd |
| : public SyntheticChildrenFrontEnd { |
| public: |
| LibcxxInitializerListSyntheticFrontEnd(lldb::ValueObjectSP valobj_sp); |
| |
| ~LibcxxInitializerListSyntheticFrontEnd() 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: |
| ValueObject *m_start; |
| CompilerType m_element_type; |
| uint32_t m_element_size; |
| size_t m_num_elements; |
| }; |
| } // namespace formatters |
| } // namespace lldb_private |
| |
| lldb_private::formatters::LibcxxInitializerListSyntheticFrontEnd:: |
| LibcxxInitializerListSyntheticFrontEnd(lldb::ValueObjectSP valobj_sp) |
| : SyntheticChildrenFrontEnd(*valobj_sp), m_start(nullptr), m_element_type(), |
| m_element_size(0), m_num_elements(0) { |
| if (valobj_sp) |
| Update(); |
| } |
| |
| lldb_private::formatters::LibcxxInitializerListSyntheticFrontEnd:: |
| ~LibcxxInitializerListSyntheticFrontEnd() { |
| // this needs to stay around because it's a child object who will follow its |
| // parent's life cycle |
| // delete m_start; |
| } |
| |
| size_t lldb_private::formatters::LibcxxInitializerListSyntheticFrontEnd:: |
| CalculateNumChildren() { |
| static ConstString g___size_("__size_"); |
| m_num_elements = 0; |
| ValueObjectSP size_sp(m_backend.GetChildMemberWithName(g___size_, true)); |
| if (size_sp) |
| m_num_elements = size_sp->GetValueAsUnsigned(0); |
| return m_num_elements; |
| } |
| |
| lldb::ValueObjectSP lldb_private::formatters:: |
| LibcxxInitializerListSyntheticFrontEnd::GetChildAtIndex(size_t idx) { |
| if (!m_start) |
| return lldb::ValueObjectSP(); |
| |
| uint64_t offset = idx * m_element_size; |
| offset = offset + m_start->GetValueAsUnsigned(0); |
| StreamString name; |
| name.Printf("[%" PRIu64 "]", (uint64_t)idx); |
| return CreateValueObjectFromAddress(name.GetString(), offset, |
| m_backend.GetExecutionContextRef(), |
| m_element_type); |
| } |
| |
| bool lldb_private::formatters::LibcxxInitializerListSyntheticFrontEnd:: |
| Update() { |
| static ConstString g___begin_("__begin_"); |
| |
| m_start = nullptr; |
| m_num_elements = 0; |
| m_element_type = m_backend.GetCompilerType().GetTypeTemplateArgument(0); |
| if (!m_element_type.IsValid()) |
| return false; |
| |
| if (llvm::Optional<uint64_t> size = m_element_type.GetByteSize(nullptr)) { |
| m_element_size = *size; |
| // Store raw pointers or end up with a circular dependency. |
| m_start = m_backend.GetChildMemberWithName(g___begin_, true).get(); |
| } |
| |
| return false; |
| } |
| |
| bool lldb_private::formatters::LibcxxInitializerListSyntheticFrontEnd:: |
| MightHaveChildren() { |
| return true; |
| } |
| |
| size_t lldb_private::formatters::LibcxxInitializerListSyntheticFrontEnd:: |
| GetIndexOfChildWithName(ConstString name) { |
| if (!m_start) |
| return UINT32_MAX; |
| return ExtractIndexFromString(name.GetCString()); |
| } |
| |
| lldb_private::SyntheticChildrenFrontEnd * |
| lldb_private::formatters::LibcxxInitializerListSyntheticFrontEndCreator( |
| CXXSyntheticChildren *, lldb::ValueObjectSP valobj_sp) { |
| return (valobj_sp ? new LibcxxInitializerListSyntheticFrontEnd(valobj_sp) |
| : nullptr); |
| } |