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