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Diffstat (limited to 'source/Plugins/Language/CPlusPlus/LibCxxUnorderedMap.cpp')
| -rw-r--r-- | source/Plugins/Language/CPlusPlus/LibCxxUnorderedMap.cpp | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/source/Plugins/Language/CPlusPlus/LibCxxUnorderedMap.cpp b/source/Plugins/Language/CPlusPlus/LibCxxUnorderedMap.cpp new file mode 100644 index 0000000000000..8ad806d52bce3 --- /dev/null +++ b/source/Plugins/Language/CPlusPlus/LibCxxUnorderedMap.cpp @@ -0,0 +1,172 @@ +//===-- 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::map<size_t,lldb::ValueObjectSP> m_children; + 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.get()), +m_tree(NULL), +m_num_elements(0), +m_next_element(nullptr), +m_children(), +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 == NULL) + return lldb::ValueObjectSP(); + + auto cached = m_children.find(idx); + if (cached != m_children.end()) + return cached->second; + + 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 val_hash.first->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(); + m_children.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) +{ + if (!valobj_sp) + return NULL; + return (new LibcxxStdUnorderedMapSyntheticFrontEnd(valobj_sp)); +} |