1 files changed, 52 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/FinalizationRegistry/prototype/cleanupSome/reentrancy.js b/js/src/tests/test262/built-ins/FinalizationRegistry/prototype/cleanupSome/reentrancy.js
new file mode 100644
index 0000000000..ebecca0725
--- /dev/null
+++ b/js/src/tests/test262/built-ins/FinalizationRegistry/prototype/cleanupSome/reentrancy.js
@@ -0,0 +1,52 @@
+// |reftest| skip-if(!this.hasOwnProperty('FinalizationRegistry')) async -- FinalizationRegistry is not enabled unconditionally
+// Copyright (C) 2019 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-properties-of-the-finalization-registry-constructor
+description: >
+  The cleanupSome() method can be reentered
+info: |
+  FinalizationRegistry.prototype.cleanupSome ( [ callback ] )
+
+features: [FinalizationRegistry.prototype.cleanupSome, FinalizationRegistry, host-gc-required]
+includes: [async-gc.js]
+flags: [async, non-deterministic]
+---*/
+
+var called = 0;
+var endOfCall = 0;
+var finalizationRegistry = new FinalizationRegistry(function() {});
+
+function callback(holding) {
+  called += 1;
+
+  if (called === 1) {
+    // Atempt to re-enter the callback.
+    var nestedCallbackRan = false;
+    finalizationRegistry.cleanupSome(() => { nestedCallbackRan = true });
+    assert.sameValue(nestedCallbackRan, true);
+  }
+
+  endOfCall += 1;
+}
+
+function emptyCells() {
+  var o1 = {};
+  var o2 = {};
+  // Register more than one objects to test reentrancy.
+  finalizationRegistry.register(o1, 'holdings 1');
+  finalizationRegistry.register(o2, 'holdings 2');
+
+  var prom = asyncGC(o1);
+  o1 = null;
+
+  return prom;
+}
+
+emptyCells().then(function() {
+  finalizationRegistry.cleanupSome(callback);
+
+  assert.sameValue(called, 1, 'callback was called');
+  assert.sameValue(endOfCall, 1, 'callback finished');
+}).then($DONE, resolveAsyncGC);