Method walk_tip

src/jrd/validation.cpp:3291–3342

}

Validation::RTN Validation::walk_tip(TraNumber transaction)
{
/**************************************
 *
 *	w a l k _ t i p
 *
 **************************************
 *
 * Functional description
 *	Walk transaction inventory pages.
 *
 **************************************/
	Database* dbb = vdr_tdbb->getDatabase();

	if (!dbb->getKnownPagesCount(pag_transactions))
		return corrupt(VAL_TIP_LOST, 0);

	tx_inv_page* page = 0;
	const ULONG pages = transaction / dbb->dbb_page_manager.transPerTIP;

	for (ULONG sequence = 0; sequence <= pages; sequence++)
	{
		auto pageNumber = dbb->getKnownPage(pag_transactions, sequence);
		if (!pageNumber)
		{
			corrupt(VAL_TIP_LOST_SEQUENCE, 0, sequence);
			if (!(vdr_flags & VDR_repair))
				continue;

			TRA_extend_tip(vdr_tdbb, sequence);
			vdr_fixed++;

			pageNumber = dbb->getKnownPage(pag_transactions, sequence);
		}

		WIN window(DB_PAGE_SPACE, -1);
		fetch_page(true, pageNumber, pag_transactions, &window, &page);

#ifdef DEBUG_VAL_VERBOSE
		if (VAL_debug_level)
			fprintf(stdout, "walk_tip: page %d next %d\n", pageNumber, page->tip_next);
#endif
		const auto next = dbb->getKnownPage(pag_transactions, sequence + 1);
		if (page->tip_next && page->tip_next != next)
		{
			corrupt(VAL_TIP_CONFUSED, 0, sequence);
		}
		release_page(&window);
	}

	return rtn_ok;
}

Validation::RTN Validation::walk_scns()
{