forked from OSchip/llvm-project
151 lines
4.1 KiB
C++
151 lines
4.1 KiB
C++
//===-- LibStdcppUniquePointer.cpp ------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "LibStdcpp.h"
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#include "lldb/Core/ValueObject.h"
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#include "lldb/DataFormatters/FormattersHelpers.h"
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#include "lldb/DataFormatters/TypeSynthetic.h"
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#include "lldb/Utility/ConstString.h"
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#include <memory>
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#include <vector>
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using namespace lldb;
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using namespace lldb_private;
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using namespace lldb_private::formatters;
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namespace {
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class LibStdcppUniquePtrSyntheticFrontEnd : public SyntheticChildrenFrontEnd {
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public:
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explicit LibStdcppUniquePtrSyntheticFrontEnd(lldb::ValueObjectSP valobj_sp);
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size_t CalculateNumChildren() override;
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lldb::ValueObjectSP GetChildAtIndex(size_t idx) override;
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bool Update() override;
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bool MightHaveChildren() override;
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size_t GetIndexOfChildWithName(const ConstString &name) override;
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bool GetSummary(Stream &stream, const TypeSummaryOptions &options);
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private:
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ValueObjectSP m_ptr_obj;
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ValueObjectSP m_obj_obj;
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ValueObjectSP m_del_obj;
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};
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} // end of anonymous namespace
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LibStdcppUniquePtrSyntheticFrontEnd::LibStdcppUniquePtrSyntheticFrontEnd(
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lldb::ValueObjectSP valobj_sp)
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: SyntheticChildrenFrontEnd(*valobj_sp) {
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Update();
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}
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bool LibStdcppUniquePtrSyntheticFrontEnd::Update() {
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ValueObjectSP valobj_backend_sp = m_backend.GetSP();
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if (!valobj_backend_sp)
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return false;
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ValueObjectSP valobj_sp = valobj_backend_sp->GetNonSyntheticValue();
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if (!valobj_sp)
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return false;
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ValueObjectSP tuple_sp =
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valobj_sp->GetChildMemberWithName(ConstString("_M_t"), true);
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if (!tuple_sp)
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return false;
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std::unique_ptr<SyntheticChildrenFrontEnd> tuple_frontend(
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LibStdcppTupleSyntheticFrontEndCreator(nullptr, tuple_sp));
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ValueObjectSP ptr_obj = tuple_frontend->GetChildAtIndex(0);
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if (ptr_obj)
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m_ptr_obj = ptr_obj->Clone(ConstString("pointer"));
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ValueObjectSP del_obj = tuple_frontend->GetChildAtIndex(1);
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if (del_obj)
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m_del_obj = del_obj->Clone(ConstString("deleter"));
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if (m_ptr_obj) {
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Status error;
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ValueObjectSP obj_obj = m_ptr_obj->Dereference(error);
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if (error.Success()) {
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m_obj_obj = obj_obj->Clone(ConstString("object"));
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}
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}
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return false;
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}
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bool LibStdcppUniquePtrSyntheticFrontEnd::MightHaveChildren() { return true; }
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lldb::ValueObjectSP
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LibStdcppUniquePtrSyntheticFrontEnd::GetChildAtIndex(size_t idx) {
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if (idx == 0)
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return m_ptr_obj;
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if (idx == 1)
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return m_del_obj;
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if (idx == 2)
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return m_obj_obj;
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return lldb::ValueObjectSP();
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}
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size_t LibStdcppUniquePtrSyntheticFrontEnd::CalculateNumChildren() {
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if (m_del_obj)
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return 2;
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return 1;
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}
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size_t LibStdcppUniquePtrSyntheticFrontEnd::GetIndexOfChildWithName(
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const ConstString &name) {
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if (name == ConstString("ptr") || name == ConstString("pointer"))
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return 0;
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if (name == ConstString("del") || name == ConstString("deleter"))
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return 1;
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if (name == ConstString("obj") || name == ConstString("object") ||
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name == ConstString("$$dereference$$"))
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return 2;
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return UINT32_MAX;
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}
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bool LibStdcppUniquePtrSyntheticFrontEnd::GetSummary(
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Stream &stream, const TypeSummaryOptions &options) {
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if (!m_ptr_obj)
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return false;
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bool success;
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uint64_t ptr_value = m_ptr_obj->GetValueAsUnsigned(0, &success);
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if (!success)
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return false;
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if (ptr_value == 0)
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stream.Printf("nullptr");
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else
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stream.Printf("0x%" PRIx64, ptr_value);
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return true;
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}
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SyntheticChildrenFrontEnd *
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lldb_private::formatters::LibStdcppUniquePtrSyntheticFrontEndCreator(
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CXXSyntheticChildren *, lldb::ValueObjectSP valobj_sp) {
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return (valobj_sp ? new LibStdcppUniquePtrSyntheticFrontEnd(valobj_sp)
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: nullptr);
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}
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bool lldb_private::formatters::LibStdcppUniquePointerSummaryProvider(
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ValueObject &valobj, Stream &stream, const TypeSummaryOptions &options) {
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LibStdcppUniquePtrSyntheticFrontEnd formatter(valobj.GetSP());
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return formatter.GetSummary(stream, options);
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}
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