fix detailed trace on anonymous classes

lib/graphql/tracing/perfetto_trace.rb

@@ -67,6 +67,8 @@ def self.included(_trace_class)
         DA_FETCH_KEYS_IID => "fetch keys",
       }
 
+      ANON_CLASS_NAME = "(anonymous)"
+
       DEBUG_INSPECT_CATEGORY_IIDS = [15]
       DA_DEBUG_INSPECT_CLASS_IID = 16
       DEBUG_INSPECT_EVENT_NAME_IID = 17
@@ -118,7 +120,7 @@ def initialize(active_support_notifications_pattern: nil, save_profile: false, *
         }
 
         @source_name_iids = Hash.new do |h, source_class|
-          h[source_class] = @interned_event_name_iids[source_class.name]
+          h[source_class] = @interned_event_name_iids[source_class.name || ANON_CLASS_NAME]
         end.compare_by_identity
 
         @auth_name_iids = Hash.new do |h, graphql_type|
@@ -144,7 +146,7 @@ def initialize(active_support_notifications_pattern: nil, save_profile: false, *
         end
 
         @class_name_iids = Hash.new do |h, k|
-          h[k] = @interned_da_string_values[k.name]
+          h[k] = @interned_da_string_values[k.name || ANON_CLASS_NAME]
         end.compare_by_identity
 
         @starting_objects = GC.stat(:total_allocated_objects)
@@ -682,7 +684,7 @@ def payload_to_debug(k, v, iid: nil, intern_value: false)
         when GraphQL::Schema::InputObject
           payload_to_debug(k, v.to_h, iid: iid, intern_value: intern_value)
         else
-          class_name_iid = @interned_da_string_values[(v.class.name || "(anonymous)")]
+          class_name_iid = @interned_da_string_values[(v.class.name || ANON_CLASS_NAME)]
           da = [
             debug_annotation(DA_DEBUG_INSPECT_CLASS_IID, :string_value_iid, class_name_iid),
           ]

spec/graphql/tracing/detailed_trace_spec.rb

@@ -3,12 +3,13 @@
 
 describe GraphQL::Tracing::DetailedTrace do
   class SamplerSchema < GraphQL::Schema
-    class Query < GraphQL::Schema::Object
-      field :truthy, Boolean, fallback_value: true, resolve_static: true
+    query = Class.new(GraphQL::Schema::Object) do
+      graphql_name "Query"
+      field :truthy, GraphQL::Types::Boolean, fallback_value: true, resolve_static: true
       def self.truthy(ctx); true; end
     end
 
-    query(Query)
+    query(query)
     use GraphQL::Tracing::DetailedTrace, memory: true
     def self.detailed_trace?(query)
       if query.is_a?(GraphQL::Execution::Multiplex)
@@ -43,6 +44,11 @@ def exec_multiplex(...)
     assert_equal 1, SamplerSchema.detailed_trace.traces.size
   end
 
+  it "works with introspection on anonymous classes" do
+    assert_nil SamplerSchema.query.name
+    assert exec_query("{ __schema { types { name } } }")
+  end
+
   it "calls through to storage for access methods" do
     exec_query("{ truthy }")
     id = SamplerSchema.detailed_trace.traces.first.id