instancesOfClass method

Future<int?> instancesOfClass(String className)

Live instances of className after a forced GC (S1r per-class counter). Counts implementers too — an abstract declared class would otherwise trivially count 0. Null on RPC failure.

Implementation

Future<int?> instancesOfClass(String className) async {
  try {
    await _service.getAllocationProfile(_isolateId, gc: true);
    final classList = await _service.getClassList(_isolateId);
    var total = 0;
    for (final c in classList.classes ?? const <vm_service.ClassRef>[]) {
      if (c.name == className && c.id != null) {
        final set = await _service.getInstances(
          _isolateId,
          c.id!,
          _kInstanceProbeLimit,
          includeSubclasses: true,
          includeImplementers: true,
        );
        total += set.totalCount ?? 0;
      }
    }
    return total;
  } catch (_) {
    return null;
  }
}