1 files changed, 39 insertions, 0 deletions
diff --git a/js/xpconnect/tests/unit/test_onGarbageCollection-03.js b/js/xpconnect/tests/unit/test_onGarbageCollection-03.js
new file mode 100644
index 0000000000..d983e2cd11
--- /dev/null
+++ b/js/xpconnect/tests/unit/test_onGarbageCollection-03.js
@@ -0,0 +1,39 @@
+// Test that the onGarbageCollection hook is not reentrant.
+
+Services.prefs.setBoolPref("security.allow_eval_with_system_principal", true);
+registerCleanupFunction(() => {
+  Services.prefs.clearUserPref("security.allow_eval_with_system_principal");
+});
+
+function run_test() {
+  do_test_pending();
+
+  const root = newGlobal();
+  const dbg = new Debugger();
+  const wrappedRoot = dbg.addDebuggee(root)
+
+  let fired = true;
+  let depth = 0;
+
+  dbg.memory.onGarbageCollection = _ => {
+    fired = true;
+
+    equal(depth, 0);
+    depth++;
+    try {
+      root.eval(`gc()`);
+    } finally {
+      equal(depth, 1);
+      depth--;
+    }
+  }
+
+  root.eval(`gc()`);
+
+  executeSoon(() => {
+    ok(fired);
+    equal(depth, 0);
+    dbg.memory.onGarbageCollection = undefined;
+    do_test_finished();
+  });
+}