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Diffstat (limited to 'test/ruby/test_shapes.rb')
-rw-r--r-- | test/ruby/test_shapes.rb | 1040 |
1 files changed, 1040 insertions, 0 deletions
diff --git a/test/ruby/test_shapes.rb b/test/ruby/test_shapes.rb new file mode 100644 index 0000000000..9b02504384 --- /dev/null +++ b/test/ruby/test_shapes.rb @@ -0,0 +1,1040 @@ +# frozen_string_literal: false +require 'test/unit' +require 'objspace' +require 'json' + +# These test the functionality of object shapes +class TestShapes < Test::Unit::TestCase + MANY_IVS = 80 + + class IVOrder + def expected_ivs + %w{ @a @b @c @d @e @f @g @h @i @j @k } + end + + def set_ivs + expected_ivs.each { instance_variable_set(_1, 1) } + self + end + end + + class ShapeOrder + def initialize + @b = :b # 5 => 6 + end + + def set_b + @b = :b # 5 => 6 + end + + def set_c + @c = :c # 5 => 7 + end + end + + class OrderedAlloc + def add_ivars + 10.times do |i| + instance_variable_set("@foo" + i.to_s, 0) + end + end + end + + class Example + def initialize + @a = 1 + end + end + + class RemoveAndAdd + def add_foo + @foo = 1 + end + + def remove_foo + remove_instance_variable(:@foo) + end + + def add_bar + @bar = 1 + end + end + + class TooComplex + attr_reader :hopefully_unique_name, :b + + def initialize + @hopefully_unique_name = "a" + @b = "b" + end + + # Make enough lazily defined accessors to allow us to force + # polymorphism + class_eval (RubyVM::Shape::SHAPE_MAX_VARIATIONS + 1).times.map { + "def a#{_1}_m; @a#{_1} ||= #{_1}; end" + }.join(" ; ") + + class_eval "attr_accessor " + (RubyVM::Shape::SHAPE_MAX_VARIATIONS + 1).times.map { + ":a#{_1}" + }.join(", ") + + def iv_not_defined; @not_defined; end + + def write_iv_method + self.a3 = 12345 + end + + def write_iv + @a3 = 12345 + end + end + + # RubyVM::Shape.of returns new instances of shape objects for + # each call. This helper method allows us to define equality for + # shapes + def assert_shape_equal(shape1, shape2) + assert_equal(shape1.id, shape2.id) + assert_equal(shape1.parent_id, shape2.parent_id) + assert_equal(shape1.depth, shape2.depth) + assert_equal(shape1.type, shape2.type) + end + + def refute_shape_equal(shape1, shape2) + refute_equal(shape1.id, shape2.id) + end + + def test_iv_order_correct_on_complex_objects + (RubyVM::Shape::SHAPE_MAX_VARIATIONS + 1).times { + IVOrder.new.instance_variable_set("@a#{_1}", 1) + } + + obj = IVOrder.new + iv_list = obj.set_ivs.instance_variables + assert_equal obj.expected_ivs, iv_list.map(&:to_s) + end + + def test_too_complex + ensure_complex + + tc = TooComplex.new + tc.send("a#{RubyVM::Shape::SHAPE_MAX_VARIATIONS}_m") + assert_predicate RubyVM::Shape.of(tc), :too_complex? + end + + def test_ordered_alloc_is_not_complex + 5.times { OrderedAlloc.new.add_ivars } + obj = JSON.parse(ObjectSpace.dump(OrderedAlloc)) + assert_operator obj["variation_count"], :<, RubyVM::Shape::SHAPE_MAX_VARIATIONS + end + + def test_too_many_ivs_on_obj + assert_separately([], "#{<<~"begin;"}\n#{<<~'end;'}") + begin; + class Hi; end + + RubyVM::Shape.exhaust_shapes(2) + + obj = Hi.new + obj.instance_variable_set(:@b, 1) + obj.instance_variable_set(:@c, 1) + obj.instance_variable_set(:@d, 1) + + assert_predicate RubyVM::Shape.of(obj), :too_complex? + end; + end + + def test_too_many_ivs_on_class + obj = Class.new + + (MANY_IVS + 1).times do + obj.instance_variable_set(:"@a#{_1}", 1) + end + + assert_false RubyVM::Shape.of(obj).too_complex? + end + + def test_removing_when_too_many_ivs_on_class + obj = Class.new + + (MANY_IVS + 2).times do + obj.instance_variable_set(:"@a#{_1}", 1) + end + (MANY_IVS + 2).times do + obj.remove_instance_variable(:"@a#{_1}") + end + + assert_empty obj.instance_variables + end + + def test_removing_when_too_many_ivs_on_module + obj = Module.new + + (MANY_IVS + 2).times do + obj.instance_variable_set(:"@a#{_1}", 1) + end + (MANY_IVS + 2).times do + obj.remove_instance_variable(:"@a#{_1}") + end + + assert_empty obj.instance_variables + end + + def test_too_complex_geniv + assert_separately([], "#{<<~"begin;"}\n#{<<~'end;'}") + begin; + class TooComplex < Hash + attr_reader :very_unique + end + + RubyVM::Shape.exhaust_shapes + + (RubyVM::Shape::SHAPE_MAX_VARIATIONS * 2).times do + TooComplex.new.instance_variable_set(:"@unique_#{_1}", 1) + end + + tc = TooComplex.new + tc.instance_variable_set(:@very_unique, 3) + tc.instance_variable_set(:@very_unique2, 4) + assert_equal 3, tc.instance_variable_get(:@very_unique) + assert_equal 4, tc.instance_variable_get(:@very_unique2) + + assert_equal [:@very_unique, :@very_unique2], tc.instance_variables + end; + end + + def test_use_all_shapes_then_freeze + assert_separately([], "#{<<~"begin;"}\n#{<<~'end;'}") + begin; + class Hi; end + RubyVM::Shape.exhaust_shapes(3) + + obj = Hi.new + i = 0 + while RubyVM::Shape.shapes_available > 0 + obj.instance_variable_set(:"@b#{i}", 1) + i += 1 + end + obj.freeze + + assert obj.frozen? + end; + end + + def test_run_out_of_shape_for_object + assert_separately([], "#{<<~"begin;"}\n#{<<~'end;'}") + begin; + class A + def initialize + @a = 1 + end + end + RubyVM::Shape.exhaust_shapes + + A.new + end; + end + + def test_run_out_of_shape_for_class_ivar + assert_separately([], "#{<<~"begin;"}\n#{<<~'end;'}") + begin; + RubyVM::Shape.exhaust_shapes + + c = Class.new + c.instance_variable_set(:@a, 1) + assert_equal(1, c.instance_variable_get(:@a)) + + c.remove_instance_variable(:@a) + assert_nil(c.instance_variable_get(:@a)) + + assert_raise(NameError) do + c.remove_instance_variable(:@a) + end + end; + end + + def test_evacuate_class_ivar_and_compaction + assert_separately([], "#{<<~"begin;"}\n#{<<~'end;'}") + begin; + count = 20 + + c = Class.new + count.times do |ivar| + c.instance_variable_set("@i#{ivar}", "ivar-#{ivar}") + end + + RubyVM::Shape.exhaust_shapes + + GC.auto_compact = true + GC.stress = true + # Cause evacuation + c.instance_variable_set(:@a, o = Object.new) + assert_equal(o, c.instance_variable_get(:@a)) + GC.stress = false + + count.times do |ivar| + assert_equal "ivar-#{ivar}", c.instance_variable_get("@i#{ivar}") + end + end; + end + + def test_evacuate_generic_ivar_and_compaction + assert_separately([], "#{<<~"begin;"}\n#{<<~'end;'}") + begin; + count = 20 + + c = Hash.new + count.times do |ivar| + c.instance_variable_set("@i#{ivar}", "ivar-#{ivar}") + end + + RubyVM::Shape.exhaust_shapes + + GC.auto_compact = true + GC.stress = true + + # Cause evacuation + c.instance_variable_set(:@a, o = Object.new) + assert_equal(o, c.instance_variable_get(:@a)) + + GC.stress = false + + count.times do |ivar| + assert_equal "ivar-#{ivar}", c.instance_variable_get("@i#{ivar}") + end + end; + end + + def test_evacuate_object_ivar_and_compaction + assert_separately([], "#{<<~"begin;"}\n#{<<~'end;'}") + begin; + count = 20 + + c = Object.new + count.times do |ivar| + c.instance_variable_set("@i#{ivar}", "ivar-#{ivar}") + end + + RubyVM::Shape.exhaust_shapes + + GC.auto_compact = true + GC.stress = true + + # Cause evacuation + c.instance_variable_set(:@a, o = Object.new) + assert_equal(o, c.instance_variable_get(:@a)) + + GC.stress = false + + count.times do |ivar| + assert_equal "ivar-#{ivar}", c.instance_variable_get("@i#{ivar}") + end + end; + end + + def test_gc_stress_during_evacuate_generic_ivar + assert_separately([], "#{<<~"begin;"}\n#{<<~'end;'}") + begin; + [].instance_variable_set(:@a, 1) + + RubyVM::Shape.exhaust_shapes + + ary = 10.times.map { [] } + + GC.stress = true + ary.each do |o| + o.instance_variable_set(:@a, 1) + o.instance_variable_set(:@b, 1) + end + end; + end + + def test_run_out_of_shape_for_module_ivar + assert_separately([], "#{<<~"begin;"}\n#{<<~'end;'}") + begin; + RubyVM::Shape.exhaust_shapes + + module Foo + @a = 1 + @b = 2 + assert_equal 1, @a + assert_equal 2, @b + end + end; + end + + def test_run_out_of_shape_for_class_cvar + assert_separately([], "#{<<~"begin;"}\n#{<<~'end;'}") + begin; + RubyVM::Shape.exhaust_shapes + + c = Class.new + + c.class_variable_set(:@@a, 1) + assert_equal(1, c.class_variable_get(:@@a)) + + c.class_eval { remove_class_variable(:@@a) } + assert_false(c.class_variable_defined?(:@@a)) + + assert_raise(NameError) do + c.class_eval { remove_class_variable(:@@a) } + end + end; + end + + def test_run_out_of_shape_generic_instance_variable_set + assert_separately([], "#{<<~"begin;"}\n#{<<~'end;'}") + begin; + class TooComplex < Hash + end + + RubyVM::Shape.exhaust_shapes + + tc = TooComplex.new + tc.instance_variable_set(:@a, 1) + tc.instance_variable_set(:@b, 2) + + tc.remove_instance_variable(:@a) + assert_nil(tc.instance_variable_get(:@a)) + + assert_raise(NameError) do + tc.remove_instance_variable(:@a) + end + end; + end + + def test_run_out_of_shape_generic_ivar_set + assert_separately([], "#{<<~"begin;"}\n#{<<~'end;'}") + begin; + class Hi < String + def initialize + 8.times do |i| + instance_variable_set("@ivar_#{i}", i) + end + end + + def transition + @hi_transition ||= 1 + end + end + + a = Hi.new + + # Try to run out of shapes + RubyVM::Shape.exhaust_shapes + + assert_equal 1, a.transition + assert_equal 1, a.transition + end; + end + + def test_run_out_of_shape_instance_variable_defined + assert_separately([], "#{<<~"begin;"}\n#{<<~'end;'}") + begin; + class A + attr_reader :a, :b, :c, :d + def initialize + @a = @b = @c = @d = 1 + end + end + + RubyVM::Shape.exhaust_shapes + + a = A.new + assert_equal true, a.instance_variable_defined?(:@a) + end; + end + + def test_run_out_of_shape_instance_variable_defined_on_module + assert_separately([], "#{<<~"begin;"}\n#{<<~'end;'}") + begin; + RubyVM::Shape.exhaust_shapes + + module A + @a = @b = @c = @d = 1 + end + + assert_equal true, A.instance_variable_defined?(:@a) + end; + end + + def test_run_out_of_shape_during_remove_instance_variable + assert_separately([], "#{<<~"begin;"}\n#{<<~'end;'}") + begin; + o = Object.new + 10.times { |i| o.instance_variable_set(:"@a#{i}", i) } + + RubyVM::Shape.exhaust_shapes + + o.remove_instance_variable(:@a0) + (1...10).each do |i| + assert_equal(i, o.instance_variable_get(:"@a#{i}")) + end + end; + end + + def test_run_out_of_shape_remove_instance_variable + assert_separately([], "#{<<~"begin;"}\n#{<<~'end;'}") + begin; + class A + attr_reader :a, :b, :c, :d + def initialize + @a = @b = @c = @d = 1 + end + end + + a = A.new + + RubyVM::Shape.exhaust_shapes + + a.remove_instance_variable(:@b) + assert_nil a.b + + a.remove_instance_variable(:@a) + assert_nil a.a + + a.remove_instance_variable(:@c) + assert_nil a.c + + assert_equal 1, a.d + end; + end + + def test_run_out_of_shape_rb_obj_copy_ivar + assert_separately([], "#{<<~"begin;"}\n#{<<~'end;'}") + begin; + class A + def initialize + init # Avoid right sizing + end + + def init + @a = @b = @c = @d = @e = @f = 1 + end + end + + a = A.new + + RubyVM::Shape.exhaust_shapes + + a.dup + end; + end + + def test_evacuate_generic_ivar_memory_leak + assert_no_memory_leak([], "#{<<~'begin;'}", "#{<<~'end;'}", rss: true) + o = [] + o.instance_variable_set(:@a, 1) + + RubyVM::Shape.exhaust_shapes + + ary = 1_000_000.times.map { [] } + begin; + ary.each do |o| + o.instance_variable_set(:@a, 1) + o.instance_variable_set(:@b, 1) + end + ary.clear + ary = nil + GC.start + end; + end + + def test_use_all_shapes_module + assert_separately([], "#{<<~"begin;"}\n#{<<~'end;'}") + begin; + class Hi; end + + RubyVM::Shape.exhaust_shapes(2) + + obj = Module.new + 3.times do + obj.instance_variable_set(:"@a#{_1}", _1) + end + + ivs = 3.times.map do + obj.instance_variable_get(:"@a#{_1}") + end + + assert_equal [0, 1, 2], ivs + end; + end + + def test_complex_freeze_after_clone + assert_separately([], "#{<<~"begin;"}\n#{<<~'end;'}") + begin; + class Hi; end + + RubyVM::Shape.exhaust_shapes(2) + + obj = Object.new + i = 0 + while RubyVM::Shape.shapes_available > 0 + obj.instance_variable_set(:"@b#{i}", i) + i += 1 + end + + v = obj.clone(freeze: true) + assert_predicate v, :frozen? + assert_equal 0, v.instance_variable_get(:@b0) + end; + end + + def test_too_complex_ractor + assert_separately([], "#{<<~"begin;"}\n#{<<~'end;'}") + begin; + $VERBOSE = nil + class TooComplex + attr_reader :very_unique + end + + RubyVM::Shape::SHAPE_MAX_VARIATIONS.times do + TooComplex.new.instance_variable_set(:"@unique_#{_1}", Object.new) + end + + tc = TooComplex.new + tc.instance_variable_set(:"@very_unique", 3) + + assert_predicate RubyVM::Shape.of(tc), :too_complex? + assert_equal 3, tc.very_unique + assert_equal 3, Ractor.new(tc) { |x| Ractor.yield(x.very_unique) }.take + assert_equal tc.instance_variables.sort, Ractor.new(tc) { |x| Ractor.yield(x.instance_variables) }.take.sort + end; + end + + def test_too_complex_ractor_shareable + assert_separately([], "#{<<~"begin;"}\n#{<<~'end;'}") + begin; + $VERBOSE = nil + class TooComplex + attr_reader :very_unique + end + + RubyVM::Shape::SHAPE_MAX_VARIATIONS.times do + TooComplex.new.instance_variable_set(:"@unique_#{_1}", Object.new) + end + + tc = TooComplex.new + tc.instance_variable_set(:"@very_unique", 3) + + assert_predicate RubyVM::Shape.of(tc), :too_complex? + assert_equal 3, tc.very_unique + assert_equal 3, Ractor.make_shareable(tc).very_unique + end; + end + + def test_too_complex_obj_ivar_ractor_share + assert_separately([], "#{<<~"begin;"}\n#{<<~'end;'}") + begin; + $VERBOSE = nil + + RubyVM::Shape.exhaust_shapes + + r = Ractor.new do + o = Object.new + o.instance_variable_set(:@a, "hello") + Ractor.yield(o) + end + + o = r.take + assert_equal "hello", o.instance_variable_get(:@a) + end; + end + + def test_too_complex_generic_ivar_ractor_share + assert_separately([], "#{<<~"begin;"}\n#{<<~'end;'}") + begin; + $VERBOSE = nil + + RubyVM::Shape.exhaust_shapes + + r = Ractor.new do + o = [] + o.instance_variable_set(:@a, "hello") + Ractor.yield(o) + end + + o = r.take + assert_equal "hello", o.instance_variable_get(:@a) + end; + end + + def test_read_iv_after_complex + ensure_complex + + tc = TooComplex.new + tc.send("a#{RubyVM::Shape::SHAPE_MAX_VARIATIONS}_m") + assert_predicate RubyVM::Shape.of(tc), :too_complex? + assert_equal 3, tc.a3_m + end + + def test_read_method_after_complex + ensure_complex + + tc = TooComplex.new + tc.send("a#{RubyVM::Shape::SHAPE_MAX_VARIATIONS}_m") + assert_predicate RubyVM::Shape.of(tc), :too_complex? + assert_equal 3, tc.a3_m + assert_equal 3, tc.a3 + end + + def test_write_method_after_complex + ensure_complex + + tc = TooComplex.new + tc.send("a#{RubyVM::Shape::SHAPE_MAX_VARIATIONS}_m") + assert_predicate RubyVM::Shape.of(tc), :too_complex? + tc.write_iv_method + tc.write_iv_method + assert_equal 12345, tc.a3_m + assert_equal 12345, tc.a3 + end + + def test_write_iv_after_complex + ensure_complex + + tc = TooComplex.new + tc.send("a#{RubyVM::Shape::SHAPE_MAX_VARIATIONS}_m") + assert_predicate RubyVM::Shape.of(tc), :too_complex? + tc.write_iv + tc.write_iv + assert_equal 12345, tc.a3_m + assert_equal 12345, tc.a3 + end + + def test_iv_read_via_method_after_complex + ensure_complex + + tc = TooComplex.new + tc.send("a#{RubyVM::Shape::SHAPE_MAX_VARIATIONS}_m") + assert_predicate RubyVM::Shape.of(tc), :too_complex? + assert_equal 3, tc.a3_m + assert_equal 3, tc.instance_variable_get(:@a3) + end + + def test_delete_iv_after_complex + ensure_complex + + tc = TooComplex.new + tc.send("a#{RubyVM::Shape::SHAPE_MAX_VARIATIONS}_m") + assert_predicate RubyVM::Shape.of(tc), :too_complex? + + assert_equal 3, tc.a3_m # make sure IV is initialized + assert tc.instance_variable_defined?(:@a3) + tc.remove_instance_variable(:@a3) + assert_nil tc.a3 + end + + def test_delete_undefined_after_complex + ensure_complex + + tc = TooComplex.new + tc.send("a#{RubyVM::Shape::SHAPE_MAX_VARIATIONS}_m") + assert_predicate RubyVM::Shape.of(tc), :too_complex? + + refute tc.instance_variable_defined?(:@a3) + assert_raise(NameError) do + tc.remove_instance_variable(:@a3) + end + assert_nil tc.a3 + end + + def test_remove_instance_variable + ivars_count = 5 + object = Object.new + ivars_count.times do |i| + object.instance_variable_set("@ivar_#{i}", i) + end + + ivars = ivars_count.times.map do |i| + object.instance_variable_get("@ivar_#{i}") + end + assert_equal [0, 1, 2, 3, 4], ivars + + object.remove_instance_variable(:@ivar_2) + + ivars = ivars_count.times.map do |i| + object.instance_variable_get("@ivar_#{i}") + end + assert_equal [0, 1, nil, 3, 4], ivars + end + + def test_remove_instance_variable_when_out_of_shapes + assert_separately([], "#{<<~"begin;"}\n#{<<~'end;'}") + begin; + ivars_count = 5 + object = Object.new + ivars_count.times do |i| + object.instance_variable_set("@ivar_#{i}", i) + end + + ivars = ivars_count.times.map do |i| + object.instance_variable_get("@ivar_#{i}") + end + assert_equal [0, 1, 2, 3, 4], ivars + + RubyVM::Shape.exhaust_shapes + + object.remove_instance_variable(:@ivar_2) + + ivars = ivars_count.times.map do |i| + object.instance_variable_get("@ivar_#{i}") + end + assert_equal [0, 1, nil, 3, 4], ivars + end; + end + + def test_remove_instance_variable_capacity_transition + assert_separately([], "#{<<~"begin;"}\n#{<<~'end;'}") + begin; + t_object_shape = RubyVM::Shape.find_by_id(RubyVM::Shape::FIRST_T_OBJECT_SHAPE_ID) + assert_equal(RubyVM::Shape::SHAPE_T_OBJECT, t_object_shape.type) + + initial_capacity = t_object_shape.capacity + + # a does not transition in capacity + a = Class.new.new + initial_capacity.times do |i| + a.instance_variable_set(:"@ivar#{i + 1}", i) + end + + # b transitions in capacity + b = Class.new.new + (initial_capacity + 1).times do |i| + b.instance_variable_set(:"@ivar#{i}", i) + end + + assert_operator(RubyVM::Shape.of(a).capacity, :<, RubyVM::Shape.of(b).capacity) + + # b will now have the same tree as a + b.remove_instance_variable(:@ivar0) + + a.instance_variable_set(:@foo, 1) + a.instance_variable_set(:@bar, 1) + + # Check that there is no heap corruption + GC.verify_internal_consistency + end; + end + + def test_freeze_after_complex + ensure_complex + + tc = TooComplex.new + tc.send("a#{RubyVM::Shape::SHAPE_MAX_VARIATIONS}_m") + assert_predicate RubyVM::Shape.of(tc), :too_complex? + tc.freeze + assert_raise(FrozenError) { tc.a3_m } + # doesn't transition to frozen shape in this case + assert_predicate RubyVM::Shape.of(tc), :too_complex? + end + + def test_read_undefined_iv_after_complex + ensure_complex + + tc = TooComplex.new + tc.send("a#{RubyVM::Shape::SHAPE_MAX_VARIATIONS}_m") + assert_predicate RubyVM::Shape.of(tc), :too_complex? + assert_equal nil, tc.iv_not_defined + assert_predicate RubyVM::Shape.of(tc), :too_complex? + end + + def test_shape_order + bar = ShapeOrder.new # 0 => 1 + bar.set_c # 1 => 2 + bar.set_b # 2 => 2 + + foo = ShapeOrder.new # 0 => 1 + shape_id = RubyVM::Shape.of(foo).id + foo.set_b # should not transition + assert_equal shape_id, RubyVM::Shape.of(foo).id + end + + def test_iv_index + example = RemoveAndAdd.new + initial_shape = RubyVM::Shape.of(example) + assert_equal 0, initial_shape.next_iv_index + + example.add_foo # makes a transition + add_foo_shape = RubyVM::Shape.of(example) + assert_equal([:@foo], example.instance_variables) + assert_equal(initial_shape.id, add_foo_shape.parent.id) + assert_equal(1, add_foo_shape.next_iv_index) + + example.remove_foo # makes a transition + remove_foo_shape = RubyVM::Shape.of(example) + assert_equal([], example.instance_variables) + assert_shape_equal(initial_shape, remove_foo_shape) + + example.add_bar # makes a transition + bar_shape = RubyVM::Shape.of(example) + assert_equal([:@bar], example.instance_variables) + assert_equal(initial_shape.id, bar_shape.parent_id) + assert_equal(1, bar_shape.next_iv_index) + end + + def test_remove_then_add_again + example = RemoveAndAdd.new + _initial_shape = RubyVM::Shape.of(example) + + example.add_foo # makes a transition + add_foo_shape = RubyVM::Shape.of(example) + example.remove_foo # makes a transition + example.add_foo # makes a transition + assert_shape_equal(add_foo_shape, RubyVM::Shape.of(example)) + end + + class TestObject; end + + def test_new_obj_has_t_object_shape + obj = TestObject.new + shape = RubyVM::Shape.of(obj) + assert_equal RubyVM::Shape::SHAPE_T_OBJECT, shape.type + assert_nil shape.parent + end + + def test_str_has_root_shape + assert_shape_equal(RubyVM::Shape.root_shape, RubyVM::Shape.of("")) + end + + def test_array_has_root_shape + assert_shape_equal(RubyVM::Shape.root_shape, RubyVM::Shape.of([])) + end + + def test_true_has_special_const_shape_id + assert_equal(RubyVM::Shape::SPECIAL_CONST_SHAPE_ID, RubyVM::Shape.of(true).id) + end + + def test_nil_has_special_const_shape_id + assert_equal(RubyVM::Shape::SPECIAL_CONST_SHAPE_ID, RubyVM::Shape.of(nil).id) + end + + def test_root_shape_transition_to_special_const_on_frozen + assert_equal(RubyVM::Shape::SPECIAL_CONST_SHAPE_ID, RubyVM::Shape.of([].freeze).id) + end + + def test_basic_shape_transition + omit "Failing with RJIT for some reason" if defined?(RubyVM::RJIT) && RubyVM::RJIT.enabled? + obj = Example.new + shape = RubyVM::Shape.of(obj) + refute_equal(RubyVM::Shape.root_shape, shape) + assert_equal :@a, shape.edge_name + assert_equal RubyVM::Shape::SHAPE_IVAR, shape.type + + shape = shape.parent + assert_equal RubyVM::Shape::SHAPE_T_OBJECT, shape.type + assert_nil shape.parent + + assert_equal(1, obj.instance_variable_get(:@a)) + end + + def test_different_objects_make_same_transition + obj = [] + obj2 = "" + obj.instance_variable_set(:@a, 1) + obj2.instance_variable_set(:@a, 1) + assert_shape_equal(RubyVM::Shape.of(obj), RubyVM::Shape.of(obj2)) + end + + def test_duplicating_objects + obj = Example.new + obj2 = obj.dup + assert_shape_equal(RubyVM::Shape.of(obj), RubyVM::Shape.of(obj2)) + end + + def test_duplicating_too_complex_objects_memory_leak + assert_no_memory_leak([], "#{<<~'begin;'}", "#{<<~'end;'}", "[Bug #20162]", rss: true) + RubyVM::Shape.exhaust_shapes + + o = Object.new + o.instance_variable_set(:@a, 0) + begin; + 1_000_000.times do + o.dup + end + end; + end + + def test_freezing_and_duplicating_object + obj = Object.new.freeze + obj2 = obj.dup + refute_predicate(obj2, :frozen?) + # dup'd objects shouldn't be frozen, and the shape should be the + # parent shape of the copied object + assert_equal(RubyVM::Shape.of(obj).parent.id, RubyVM::Shape.of(obj2).id) + end + + def test_freezing_and_duplicating_object_with_ivars + obj = Example.new.freeze + obj2 = obj.dup + refute_predicate(obj2, :frozen?) + refute_shape_equal(RubyVM::Shape.of(obj), RubyVM::Shape.of(obj2)) + assert_equal(obj2.instance_variable_get(:@a), 1) + end + + def test_freezing_and_duplicating_string_with_ivars + str = "str" + str.instance_variable_set(:@a, 1) + str.freeze + str2 = str.dup + refute_predicate(str2, :frozen?) + refute_equal(RubyVM::Shape.of(str).id, RubyVM::Shape.of(str2).id) + assert_equal(str2.instance_variable_get(:@a), 1) + end + + def test_freezing_and_cloning_objects + obj = Object.new.freeze + obj2 = obj.clone(freeze: true) + assert_predicate(obj2, :frozen?) + assert_shape_equal(RubyVM::Shape.of(obj), RubyVM::Shape.of(obj2)) + end + + def test_cloning_with_freeze_option + obj = Object.new + obj2 = obj.clone(freeze: true) + assert_predicate(obj2, :frozen?) + refute_shape_equal(RubyVM::Shape.of(obj), RubyVM::Shape.of(obj2)) + assert_equal(RubyVM::Shape::SHAPE_FROZEN, RubyVM::Shape.of(obj2).type) + assert_shape_equal(RubyVM::Shape.of(obj), RubyVM::Shape.of(obj2).parent) + end + + def test_freezing_and_cloning_object_with_ivars + obj = Example.new.freeze + obj2 = obj.clone(freeze: true) + assert_predicate(obj2, :frozen?) + assert_shape_equal(RubyVM::Shape.of(obj), RubyVM::Shape.of(obj2)) + assert_equal(obj2.instance_variable_get(:@a), 1) + end + + def test_freezing_and_cloning_string + str = ("str" + "str").freeze + str2 = str.clone(freeze: true) + assert_predicate(str2, :frozen?) + assert_shape_equal(RubyVM::Shape.of(str), RubyVM::Shape.of(str2)) + end + + def test_freezing_and_cloning_string_with_ivars + str = "str" + str.instance_variable_set(:@a, 1) + str.freeze + str2 = str.clone(freeze: true) + assert_predicate(str2, :frozen?) + assert_shape_equal(RubyVM::Shape.of(str), RubyVM::Shape.of(str2)) + assert_equal(str2.instance_variable_get(:@a), 1) + end + + def test_out_of_bounds_shape + assert_raise ArgumentError do + RubyVM::Shape.find_by_id(RubyVM.stat[:next_shape_id]) + end + assert_raise ArgumentError do + RubyVM::Shape.find_by_id(-1) + end + end + + def ensure_complex + RubyVM::Shape::SHAPE_MAX_VARIATIONS.times do + tc = TooComplex.new + tc.send("a#{_1}_m") + end + end +end if defined?(RubyVM::Shape) |