test_onGarbageCollection-03.js

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// 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();

});