    buf[buf_i] = (char*)td->alloc_->alloc();
    EXPECT_NE((char*)NULL, buf[buf_i]);
    memset(buf[buf_i], 0, td->obj_size_);
  }
  td->count_ += td->hold_n_;
  while (*td->run_) {
    for (int64_t buf_i = 0; buf_i < td->hold_n_; ++buf_i) {
      td->alloc_->free(buf[buf_i]);
      buf[buf_i] = (char*)td->alloc_->alloc();
      EXPECT_NE((char*)NULL, buf[buf_i]);
    }
    td->count_ += td->hold_n_;
  }
  for (int64_t buf_i = 0; buf_i < td->hold_n_; ++buf_i) {