test_HeapSnapshot_takeCensus_05.js

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/* Any copyright is dedicated to the Public Domain.

   http://creativecommons.org/publicdomain/zero/1.0/ */

// Test that HeapSnapshot.prototype.takeCensus finds cross compartment

// wrapper GC roots.

//

// Ported from js/src/jit-test/tests/debug/Memory-takeCensus-05.js

/* eslint-disable strict */

function run_test() {

  const g = newGlobal();

  const dbg = new Debugger(g);

  equal(

    "AllocationMarker" in saveHeapSnapshotAndTakeCensus(dbg).objects,

    false,

    "No allocation markers should exist in the census."

);

  this.ccw = g.allocationMarker();

  const census = saveHeapSnapshotAndTakeCensus(dbg);

  equal(

    census.objects.AllocationMarker.count,

1,

    "Should have one allocation marker in the census, because there " +

      "is one cross-compartment wrapper referring to it."

);

  do_test_finished();