Function find_object_near

deps/v8/tools/windbg.js:397–420

(aligned_addr, max_distance, step_op)

}

function find_object_near(aligned_addr, max_distance, step_op) {
  if (!step_op) {
    const step = tagged_size();
    const prev =
      find_object_near(aligned_addr, max_distance, x => x - step);
    const next =
      find_object_near(aligned_addr, max_distance, x => x + step);

    if (!prev) return next;
    if (!next) return prev;
    return (addr - prev <= next - addr) ? prev : next;
  }

  let maybe_map_addr = poim(aligned_addr);
  let iters = 0;
  while (maybe_map_addr && iters < max_distance) {
    if (is_map(maybe_map_addr)) {
      return aligned_addr;
    }
    aligned_addr = step_op(aligned_addr);
    maybe_map_addr = poim(aligned_addr);
    iters++;
  }
}

function find_object_prev(addr, max_distance) {
  if (!Number.isSafeInteger(int(addr))) return;