================ @@ -246,3 +270,119 @@ lldb_private::formatters::LibcxxStdUnorderedMapSyntheticFrontEndCreator( return (valobj_sp ? new LibcxxStdUnorderedMapSyntheticFrontEnd(valobj_sp) : nullptr); } + +lldb_private::formatters::LibCxxUnorderedMapIteratorSyntheticFrontEnd:: + LibCxxUnorderedMapIteratorSyntheticFrontEnd(lldb::ValueObjectSP valobj_sp) + : SyntheticChildrenFrontEnd(*valobj_sp) { + if (valobj_sp) + Update(); +} + +lldb::ChildCacheState lldb_private::formatters:: + LibCxxUnorderedMapIteratorSyntheticFrontEnd::Update() { + m_pair_sp.reset(); + + ValueObjectSP valobj_sp = m_backend.GetSP(); + if (!valobj_sp) + return lldb::ChildCacheState::eRefetch; + + TargetSP target_sp(valobj_sp->GetTargetSP()); + + if (!target_sp) + return lldb::ChildCacheState::eRefetch; + + // Get the unordered_map::iterator + // m_backend is an 'unordered_map::iterator', aka a + // '__hash_map_iterator<__hash_table::iterator>' + // + // __hash_map_iterator::__i_ is a __hash_table::iterator (aka + // __hash_iterator<__node_pointer>) + auto hash_iter_sp = valobj_sp->GetChildMemberWithName("__i_"); + if (!hash_iter_sp) + return lldb::ChildCacheState::eRefetch; + + // Type is '__hash_iterator<__node_pointer>' + auto hash_iter_type = hash_iter_sp->GetCompilerType(); + if (!hash_iter_type.IsValid()) + return lldb::ChildCacheState::eRefetch; + + // Type is '__node_pointer' + auto node_pointer_type = hash_iter_type.GetTypeTemplateArgument(0); + if (!node_pointer_type.IsValid()) + return lldb::ChildCacheState::eRefetch; + + // Cast the __hash_iterator to a __node_pointer (which stores our key/value + // pair) + auto hash_node_sp = hash_iter_sp->Cast(node_pointer_type); + if (!hash_node_sp) + return lldb::ChildCacheState::eRefetch; + + auto key_value_sp = hash_node_sp->GetChildMemberWithName("__value_"); + if (!key_value_sp) { + // clang-format off + // Since D101206 (ba79fb2e1f), libc++ wraps the `__value_` in an + // anonymous union. + // Child 0: __hash_node_base base class + // Child 1: __hash_ + // Child 2: anonymous union + // clang-format on + auto anon_union_sp = hash_node_sp->GetChildAtIndex(2); + if (!anon_union_sp) + return lldb::ChildCacheState::eRefetch; + + key_value_sp = anon_union_sp->GetChildMemberWithName("__value_"); + if (!key_value_sp) + return lldb::ChildCacheState::eRefetch; + } + + // Create the synthetic child, which is a pair where the key and value can be + // retrieved // by querying the synthetic frontend for ---------------- labath wrote:
remove extra `//` https://github.com/llvm/llvm-project/pull/97754 _______________________________________________ lldb-commits mailing list lldb-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/lldb-commits