Coverage Report

Created: 2022-07-16 07:03

/Users/buildslave/jenkins/workspace/coverage/llvm-project/lldb/source/Plugins/Language/CPlusPlus/LibCxxInitializerList.cpp
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//===-- LibCxxInitializerList.cpp -----------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "LibCxx.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/Utility/ConstString.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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namespace lldb_private {
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namespace formatters {
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class LibcxxInitializerListSyntheticFrontEnd
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    : public SyntheticChildrenFrontEnd {
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public:
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  LibcxxInitializerListSyntheticFrontEnd(lldb::ValueObjectSP valobj_sp);
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  ~LibcxxInitializerListSyntheticFrontEnd() override;
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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(ConstString name) override;
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private:
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  ValueObject *m_start = nullptr;
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  CompilerType m_element_type;
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  uint32_t m_element_size = 0;
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  size_t m_num_elements = 0;
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};
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} // namespace formatters
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} // namespace lldb_private
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lldb_private::formatters::LibcxxInitializerListSyntheticFrontEnd::
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    LibcxxInitializerListSyntheticFrontEnd(lldb::ValueObjectSP valobj_sp)
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    : SyntheticChildrenFrontEnd(*valobj_sp), m_element_type() {
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  if (valobj_sp)
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    Update();
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}
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lldb_private::formatters::LibcxxInitializerListSyntheticFrontEnd::
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    ~LibcxxInitializerListSyntheticFrontEnd() {
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  // this needs to stay around because it's a child object who will follow its
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  // parent's life cycle
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  // delete m_start;
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}
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size_t lldb_private::formatters::LibcxxInitializerListSyntheticFrontEnd::
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    CalculateNumChildren() {
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  static ConstString g_size_("__size_");
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  m_num_elements = 0;
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  ValueObjectSP size_sp(m_backend.GetChildMemberWithName(g_size_, true));
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  if (size_sp)
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    m_num_elements = size_sp->GetValueAsUnsigned(0);
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  return m_num_elements;
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}
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lldb::ValueObjectSP lldb_private::formatters::
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    LibcxxInitializerListSyntheticFrontEnd::GetChildAtIndex(size_t idx) {
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  if (!m_start)
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    return lldb::ValueObjectSP();
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  uint64_t offset = idx * m_element_size;
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  offset = offset + m_start->GetValueAsUnsigned(0);
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  StreamString name;
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  name.Printf("[%" PRIu64 "]", (uint64_t)idx);
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  return CreateValueObjectFromAddress(name.GetString(), offset,
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                                      m_backend.GetExecutionContextRef(),
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                                      m_element_type);
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}
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bool lldb_private::formatters::LibcxxInitializerListSyntheticFrontEnd::
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    Update() {
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  static ConstString g_begin_("__begin_");
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  m_start = nullptr;
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  m_num_elements = 0;
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  m_element_type = m_backend.GetCompilerType().GetTypeTemplateArgument(0);
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  if (!m_element_type.IsValid())
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    return false;
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  if (llvm::Optional<uint64_t> size = m_element_type.GetByteSize(nullptr)) {
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    m_element_size = *size;
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    // Store raw pointers or end up with a circular dependency.
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    m_start = m_backend.GetChildMemberWithName(g_begin_, true).get();
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  }
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  return false;
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}
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bool lldb_private::formatters::LibcxxInitializerListSyntheticFrontEnd::
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    MightHaveChildren() {
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  return true;
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}
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size_t lldb_private::formatters::LibcxxInitializerListSyntheticFrontEnd::
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    GetIndexOfChildWithName(ConstString name) {
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  if (!m_start)
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    return UINT32_MAX;
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  return ExtractIndexFromString(name.GetCString());
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}
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lldb_private::SyntheticChildrenFrontEnd *
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lldb_private::formatters::LibcxxInitializerListSyntheticFrontEndCreator(
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    CXXSyntheticChildren *, lldb::ValueObjectSP valobj_sp) {
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  return (valobj_sp ? new LibcxxInitializerListSyntheticFrontEnd(valobj_sp)
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                    : 
nullptr0
);
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}