contrib/llvm/tools/lldb/source/Plugins/Language/CPlusPlus/LibCxxAtomic.cpp

   1 //===-- LibCxxAtomic.cpp ------------------------------------------*- C++
   2 //-*-===//
   3 //
   4 //                     The LLVM Compiler Infrastructure
   5 //
   6 // This file is distributed under the University of Illinois Open Source
   7 // License. See LICENSE.TXT for details.
   8 //
   9 //===----------------------------------------------------------------------===//
  10
  11 #include "LibCxxAtomic.h"
  12
  13 using namespace lldb;
  14 using namespace lldb_private;
  15 using namespace lldb_private::formatters;
  16
  17 bool lldb_private::formatters::LibCxxAtomicSummaryProvider(
  18     ValueObject &valobj, Stream &stream, const TypeSummaryOptions &options) {
  19   static ConstString g___a_("__a_");
  20
  21   if (ValueObjectSP child = valobj.GetChildMemberWithName(g___a_, true)) {
  22     std::string summary;
  23     if (child->GetSummaryAsCString(summary, options) && summary.size() > 0) {
  24       stream.Printf("%s", summary.c_str());
  25       return true;
  26     }
  27   }
  28
  29   return false;
  30 }
  31
  32 namespace lldb_private {
  33 namespace formatters {
  34 class LibcxxStdAtomicSyntheticFrontEnd : public SyntheticChildrenFrontEnd {
  35 public:
  36   LibcxxStdAtomicSyntheticFrontEnd(lldb::ValueObjectSP valobj_sp);
  37
  38   ~LibcxxStdAtomicSyntheticFrontEnd() override = default;
  39
  40   size_t CalculateNumChildren() override;
  41
  42   lldb::ValueObjectSP GetChildAtIndex(size_t idx) override;
  43
  44   bool Update() override;
  45
  46   bool MightHaveChildren() override;
  47
  48   size_t GetIndexOfChildWithName(const ConstString &name) override;
  49
  50   lldb::ValueObjectSP GetSyntheticValue() override;
  51
  52 private:
  53   ValueObject *m_real_child;
  54 };
  55 } // namespace formatters
  56 } // namespace lldb_private
  57
  58 lldb_private::formatters::LibcxxStdAtomicSyntheticFrontEnd::
  59     LibcxxStdAtomicSyntheticFrontEnd(lldb::ValueObjectSP valobj_sp)
  60     : SyntheticChildrenFrontEnd(*valobj_sp), m_real_child(nullptr) {}
  61
  62 bool lldb_private::formatters::LibcxxStdAtomicSyntheticFrontEnd::Update() {
  63   static ConstString g___a_("__a_");
  64
  65   m_real_child = m_backend.GetChildMemberWithName(g___a_, true).get();
  66
  67   return false;
  68 }
  69
  70 bool lldb_private::formatters::LibcxxStdAtomicSyntheticFrontEnd::
  71     MightHaveChildren() {
  72   return true;
  73 }
  74
  75 size_t lldb_private::formatters::LibcxxStdAtomicSyntheticFrontEnd::
  76     CalculateNumChildren() {
  77   return m_real_child ? m_real_child->GetNumChildren() : 0;
  78 }
  79
  80 lldb::ValueObjectSP
  81 lldb_private::formatters::LibcxxStdAtomicSyntheticFrontEnd::GetChildAtIndex(
  82     size_t idx) {
  83   return m_real_child ? m_real_child->GetChildAtIndex(idx, true) : nullptr;
  84 }
  85
  86 size_t lldb_private::formatters::LibcxxStdAtomicSyntheticFrontEnd::
  87     GetIndexOfChildWithName(const ConstString &name) {
  88   return m_real_child ? m_real_child->GetIndexOfChildWithName(name)
  89                       : UINT32_MAX;
  90 }
  91
  92 lldb::ValueObjectSP lldb_private::formatters::LibcxxStdAtomicSyntheticFrontEnd::
  93     GetSyntheticValue() {
  94   if (m_real_child && m_real_child->CanProvideValue())
  95     return m_real_child->GetSP();
  96   return nullptr;
  97 }
  98
  99 SyntheticChildrenFrontEnd *
 100 lldb_private::formatters::LibcxxAtomicSyntheticFrontEndCreator(
 101     CXXSyntheticChildren *, lldb::ValueObjectSP valobj_sp) {
 102   if (valobj_sp)
 103     return new LibcxxStdAtomicSyntheticFrontEnd(valobj_sp);
 104   return nullptr;
 105 }