866e91c9d4
read during materialization. First of all, report if we can't read the data for some reason. Second, consult the ValueObject's error and report that if there's some problem. <rdar://problem/16074201> llvm-svn: 202552
140 lines
4.8 KiB
C++
140 lines
4.8 KiB
C++
//===-- LibCxxUnorderedMap.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 "lldb/lldb-python.h"
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#include "lldb/DataFormatters/CXXFormatterFunctions.h"
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#include "lldb/Core/DataBufferHeap.h"
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#include "lldb/Core/Error.h"
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#include "lldb/Core/Stream.h"
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#include "lldb/Core/ValueObject.h"
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#include "lldb/Core/ValueObjectConstResult.h"
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#include "lldb/Host/Endian.h"
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#include "lldb/Symbol/ClangASTContext.h"
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#include "lldb/Target/ObjCLanguageRuntime.h"
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#include "lldb/Target/Target.h"
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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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lldb_private::formatters::LibcxxStdUnorderedMapSyntheticFrontEnd::LibcxxStdUnorderedMapSyntheticFrontEnd (lldb::ValueObjectSP valobj_sp) :
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SyntheticChildrenFrontEnd(*valobj_sp.get()),
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m_tree(NULL),
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m_num_elements(0),
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m_next_element(nullptr),
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m_children(),
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m_elements_cache()
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{
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if (valobj_sp)
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Update();
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}
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size_t
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lldb_private::formatters::LibcxxStdUnorderedMapSyntheticFrontEnd::CalculateNumChildren ()
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{
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if (m_num_elements != UINT32_MAX)
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return m_num_elements;
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return 0;
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}
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lldb::ValueObjectSP
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lldb_private::formatters::LibcxxStdUnorderedMapSyntheticFrontEnd::GetChildAtIndex (size_t idx)
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{
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if (idx >= CalculateNumChildren())
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return lldb::ValueObjectSP();
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if (m_tree == NULL)
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return lldb::ValueObjectSP();
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auto cached = m_children.find(idx);
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if (cached != m_children.end())
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return cached->second;
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while (idx >= m_elements_cache.size())
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{
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if (m_next_element == nullptr)
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return lldb::ValueObjectSP();
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Error error;
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ValueObjectSP node_sp = m_next_element->Dereference(error);
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if (!node_sp || error.Fail())
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return lldb::ValueObjectSP();
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ValueObjectSP value_sp = node_sp->GetChildMemberWithName(ConstString("__value_"), true);
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ValueObjectSP hash_sp = node_sp->GetChildMemberWithName(ConstString("__hash_"), true);
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if (!hash_sp || !value_sp)
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return lldb::ValueObjectSP();
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m_elements_cache.push_back({value_sp.get(),hash_sp->GetValueAsUnsigned(0)});
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m_next_element = node_sp->GetChildMemberWithName(ConstString("__next_"),true).get();
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if (!m_next_element || m_next_element->GetValueAsUnsigned(0) == 0)
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m_next_element = nullptr;
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}
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std::pair<ValueObject*, uint64_t> val_hash = m_elements_cache[idx];
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if (!val_hash.first)
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return lldb::ValueObjectSP();
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StreamString stream;
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stream.Printf("[%zu]",idx);
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DataExtractor data;
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Error error;
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val_hash.first->GetData(data, error);
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if (error.Fail())
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return lldb::ValueObjectSP();
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const bool thread_and_frame_only_if_stopped = true;
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ExecutionContext exe_ctx = val_hash.first->GetExecutionContextRef().Lock(thread_and_frame_only_if_stopped);
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return val_hash.first->CreateValueObjectFromData(stream.GetData(),
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data,
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exe_ctx,
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val_hash.first->GetClangType());
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}
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bool
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lldb_private::formatters::LibcxxStdUnorderedMapSyntheticFrontEnd::Update()
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{
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m_num_elements = UINT32_MAX;
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m_next_element = nullptr;
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m_elements_cache.clear();
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m_children.clear();
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ValueObjectSP table_sp = m_backend.GetChildMemberWithName(ConstString("__table_"), true);
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if (!table_sp)
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return false;
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ValueObjectSP num_elements_sp = table_sp->GetChildAtNamePath({ConstString("__p2_"),ConstString("__first_")});
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if (!num_elements_sp)
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return false;
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m_num_elements = num_elements_sp->GetValueAsUnsigned(0);
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m_tree = table_sp->GetChildAtNamePath({ConstString("__p1_"),ConstString("__first_"),ConstString("__next_")}).get();
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if (m_num_elements > 0)
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m_next_element = table_sp->GetChildAtNamePath({ConstString("__p1_"),ConstString("__first_"),ConstString("__next_")}).get();
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return false;
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}
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bool
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lldb_private::formatters::LibcxxStdUnorderedMapSyntheticFrontEnd::MightHaveChildren ()
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{
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return true;
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}
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size_t
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lldb_private::formatters::LibcxxStdUnorderedMapSyntheticFrontEnd::GetIndexOfChildWithName (const ConstString &name)
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{
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return ExtractIndexFromString(name.GetCString());
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}
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lldb_private::formatters::LibcxxStdUnorderedMapSyntheticFrontEnd::~LibcxxStdUnorderedMapSyntheticFrontEnd ()
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{}
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SyntheticChildrenFrontEnd*
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lldb_private::formatters::LibcxxStdUnorderedMapSyntheticFrontEndCreator (CXXSyntheticChildren*, lldb::ValueObjectSP valobj_sp)
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{
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if (!valobj_sp)
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return NULL;
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return (new LibcxxStdUnorderedMapSyntheticFrontEnd(valobj_sp));
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}
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