runtime/tests/vm/dart/gc/splay_dart_finalizer_test.dart

// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

// This test is a derivative of the Splay benchmark that is run with a variety
// of different GC options. It makes for a good GC stress test because it
// continuously makes small changes to a large, long-lived data structure,
// stressing lots of combinations of references between new-gen and old-gen
// objects, and between marked and unmarked objects.

// VMOptions=
// VMOptions=--no_concurrent_mark --no_concurrent_sweep
// VMOptions=--no_concurrent_mark --concurrent_sweep
// VMOptions=--no_concurrent_mark --use_compactor
// VMOptions=--no_concurrent_mark --use_compactor --force_evacuation
// VMOptions=--concurrent_mark --no_concurrent_sweep
// VMOptions=--concurrent_mark --concurrent_sweep
// VMOptions=--concurrent_mark --use_compactor
// VMOptions=--concurrent_mark --use_compactor --force_evacuation
// VMOptions=--scavenger_tasks=0
// VMOptions=--scavenger_tasks=1
// VMOptions=--scavenger_tasks=2
// VMOptions=--scavenger_tasks=3
// VMOptions=--verify_before_gc
// VMOptions=--verify_after_gc
// VMOptions=--verify_before_gc --verify_after_gc
// VMOptions=--verify_store_buffer
// VMOptions=--verify_after_marking
// VMOptions=--runtime_allocate_old
// VMOptions=--runtime_allocate_spill_tlab
// VMOptions=--no_inline_alloc
// VMOptions=--old_gen_heap_size=150

import "splay_common.dart";

void main() {
  // Split across turns so finalizers can run.
  FinalizerSplay().mainAsync();
}

class FinalizerSplay extends Splay {
  newPayload(int depth, String tag) => Payload.generate(depth, tag);
  Node newNode(num key, Object? value) => new FinalizerNode(key, value);
}

class Payload {
  Payload(this.left, this.right);
  var left, right;

  static generate(depth, tag) {
    if (depth == 0) return new Leaf(tag);
    return new Payload(generate(depth - 1, tag), generate(depth - 1, tag));
  }
}

final nodeLeft = <Object, Node?>{};
final nodeRight = <Object, Node?>{};
finalizeNode(Object token) {
  nodeLeft.remove(token);
  nodeRight.remove(token);
}

final nodeFinalizer = new Finalizer<Object>(finalizeNode);

class FinalizerNode extends Node {
  FinalizerNode(num key, Object? value) : super(key, value) {
    this.left = null;
    this.right = null;
    nodeFinalizer.attach(this, token, detach: this);
  }

  var token = new Object();
  Node? get left => nodeLeft[token];
  set left(Node? value) => nodeLeft[token] = value;
  Node? get right => nodeRight[token];
  set right(Node? value) => nodeRight[token] = value;
}