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//===-- LibCxxUnorderedMap.cpp ----------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// C Includes
// C++ Includes
// Other libraries and framework includes
// Project includes
#include "LibCxx.h"
#include "lldb/Core/DataBufferHeap.h"
#include "lldb/Core/Error.h"
#include "lldb/Core/Stream.h"
#include "lldb/Core/ValueObject.h"
#include "lldb/Core/ValueObjectConstResult.h"
#include "lldb/DataFormatters/FormattersHelpers.h"
#include "lldb/Host/Endian.h"
#include "lldb/Symbol/ClangASTContext.h"
#include "lldb/Target/Target.h"
using namespace lldb;
using namespace lldb_private;
using namespace lldb_private::formatters;
namespace lldb_private {
namespace formatters {
class LibcxxStdUnorderedMapSyntheticFrontEnd : public SyntheticChildrenFrontEnd
{
public:
LibcxxStdUnorderedMapSyntheticFrontEnd (lldb::ValueObjectSP valobj_sp);
~LibcxxStdUnorderedMapSyntheticFrontEnd() override = default;
size_t
CalculateNumChildren() override;
lldb::ValueObjectSP
GetChildAtIndex(size_t idx) override;
bool
Update() override;
bool
MightHaveChildren() override;
size_t
GetIndexOfChildWithName(const ConstString &name) override;
private:
ValueObject* m_tree;
size_t m_num_elements;
ValueObject* m_next_element;
std::vector<std::pair<ValueObject*, uint64_t> > m_elements_cache;
};
} // namespace formatters
} // namespace lldb_private
lldb_private::formatters::LibcxxStdUnorderedMapSyntheticFrontEnd::LibcxxStdUnorderedMapSyntheticFrontEnd (lldb::ValueObjectSP valobj_sp) :
SyntheticChildrenFrontEnd(*valobj_sp),
m_tree(nullptr),
m_num_elements(0),
m_next_element(nullptr),
m_elements_cache()
{
if (valobj_sp)
Update();
}
size_t
lldb_private::formatters::LibcxxStdUnorderedMapSyntheticFrontEnd::CalculateNumChildren ()
{
if (m_num_elements != UINT32_MAX)
return m_num_elements;
return 0;
}
lldb::ValueObjectSP
lldb_private::formatters::LibcxxStdUnorderedMapSyntheticFrontEnd::GetChildAtIndex (size_t idx)
{
if (idx >= CalculateNumChildren())
return lldb::ValueObjectSP();
if (m_tree == nullptr)
return lldb::ValueObjectSP();
while (idx >= m_elements_cache.size())
{
if (m_next_element == nullptr)
return lldb::ValueObjectSP();
Error error;
ValueObjectSP node_sp = m_next_element->Dereference(error);
if (!node_sp || error.Fail())
return lldb::ValueObjectSP();
ValueObjectSP value_sp = node_sp->GetChildMemberWithName(ConstString("__value_"), true);
ValueObjectSP hash_sp = node_sp->GetChildMemberWithName(ConstString("__hash_"), true);
if (!hash_sp || !value_sp)
return lldb::ValueObjectSP();
m_elements_cache.push_back({value_sp.get(),hash_sp->GetValueAsUnsigned(0)});
m_next_element = node_sp->GetChildMemberWithName(ConstString("__next_"),true).get();
if (!m_next_element || m_next_element->GetValueAsUnsigned(0) == 0)
m_next_element = nullptr;
}
std::pair<ValueObject*, uint64_t> val_hash = m_elements_cache[idx];
if (!val_hash.first)
return lldb::ValueObjectSP();
StreamString stream;
stream.Printf("[%" PRIu64 "]", (uint64_t)idx);
DataExtractor data;
Error error;
val_hash.first->GetData(data, error);
if (error.Fail())
return lldb::ValueObjectSP();
const bool thread_and_frame_only_if_stopped = true;
ExecutionContext exe_ctx = val_hash.first->GetExecutionContextRef().Lock(thread_and_frame_only_if_stopped);
return CreateValueObjectFromData(stream.GetData(),
data,
exe_ctx,
val_hash.first->GetCompilerType());
}
bool
lldb_private::formatters::LibcxxStdUnorderedMapSyntheticFrontEnd::Update()
{
m_num_elements = UINT32_MAX;
m_next_element = nullptr;
m_elements_cache.clear();
ValueObjectSP table_sp = m_backend.GetChildMemberWithName(ConstString("__table_"), true);
if (!table_sp)
return false;
ValueObjectSP num_elements_sp = table_sp->GetChildAtNamePath({ConstString("__p2_"),ConstString("__first_")});
if (!num_elements_sp)
return false;
m_num_elements = num_elements_sp->GetValueAsUnsigned(0);
m_tree = table_sp->GetChildAtNamePath({ConstString("__p1_"),ConstString("__first_"),ConstString("__next_")}).get();
if (m_num_elements > 0)
m_next_element = table_sp->GetChildAtNamePath({ConstString("__p1_"),ConstString("__first_"),ConstString("__next_")}).get();
return false;
}
bool
lldb_private::formatters::LibcxxStdUnorderedMapSyntheticFrontEnd::MightHaveChildren ()
{
return true;
}
size_t
lldb_private::formatters::LibcxxStdUnorderedMapSyntheticFrontEnd::GetIndexOfChildWithName (const ConstString &name)
{
return ExtractIndexFromString(name.GetCString());
}
SyntheticChildrenFrontEnd*
lldb_private::formatters::LibcxxStdUnorderedMapSyntheticFrontEndCreator (CXXSyntheticChildren*, lldb::ValueObjectSP valobj_sp)
{
return (valobj_sp ? new LibcxxStdUnorderedMapSyntheticFrontEnd(valobj_sp) : nullptr);
}
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