/*****************************************************************************

Copyright (c) 1994, 2009, Oracle and/or its affiliates. All Rights Reserved.

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License, version 2.0,
as published by the Free Software Foundation.

This program is also distributed with certain software (including
but not limited to OpenSSL) that is licensed under separate terms,
as designated in a particular file or component or in included license
documentation.  The authors of MySQL hereby grant you an additional
permission to link the program and your derivative works with the
separately licensed software that they have included with MySQL.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License, version 2.0, for more details.

You should have received a copy of the GNU General Public License along with
this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA

*****************************************************************************/

/*****************************************************************//**
@file ut/ut0dbg.cc
Debug utilities for Innobase.

Created 1/30/1994 Heikki Tuuri
**********************************************************************/

#include "univ.i"
#include "ut0dbg.h"
#ifndef UNIV_HOTBACKUP
# include "ha_prototypes.h"
#endif /* !UNIV_HOTBACKUP */

#if defined(__GNUC__) && (__GNUC__ > 2)
#else
/** This is used to eliminate compiler warnings */
UNIV_INTERN ulint	ut_dbg_zero	= 0;
#endif

/*************************************************************//**
Report a failed assertion. */
UNIV_INTERN
void
ut_dbg_assertion_failed(
/*====================*/
	const char* expr,	/*!< in: the failed assertion (optional) */
	const char* file,	/*!< in: source file containing the assertion */
	ulint line)		/*!< in: line number of the assertion */
{
	ut_print_timestamp(stderr);
#ifdef UNIV_HOTBACKUP
	fprintf(stderr, "  InnoDB: Assertion failure in file %s line %lu\n",
		file, line);
#else /* UNIV_HOTBACKUP */
	fprintf(stderr,
		"  InnoDB: Assertion failure in thread %lu"
		" in file %s line %lu\n",
		os_thread_pf(os_thread_get_curr_id()),
		innobase_basename(file), line);
#endif /* UNIV_HOTBACKUP */
	if (expr) {
		fprintf(stderr,
			"InnoDB: Failing assertion: %s\n", expr);
	}

	fputs("InnoDB: We intentionally generate a memory trap.\n"
	      "InnoDB: Submit a detailed bug report"
	      " to http://bugs.mysql.com.\n"
	      "InnoDB: If you get repeated assertion failures"
	      " or crashes, even\n"
	      "InnoDB: immediately after the mysqld startup, there may be\n"
	      "InnoDB: corruption in the InnoDB tablespace. Please refer to\n"
	      "InnoDB: " REFMAN "forcing-innodb-recovery.html\n"
	      "InnoDB: about forcing recovery.\n", stderr);
}

#ifdef UNIV_COMPILE_TEST_FUNCS

#include <sys/types.h>
#include <sys/time.h>
#include <sys/resource.h>

#include <unistd.h>

#ifndef timersub
#define timersub(a, b, r)						\
	do {								\
		(r)->tv_sec = (a)->tv_sec - (b)->tv_sec;		\
		(r)->tv_usec = (a)->tv_usec - (b)->tv_usec;		\
		if ((r)->tv_usec < 0) {					\
			(r)->tv_sec--;					\
			(r)->tv_usec += 1000000;			\
		}							\
	} while (0)
#endif /* timersub */

/*******************************************************************//**
Resets a speedo (records the current time in it). */
UNIV_INTERN
void
speedo_reset(
/*=========*/
	speedo_t*	speedo)	/*!< out: speedo */
{
	gettimeofday(&speedo->tv, NULL);

	getrusage(RUSAGE_SELF, &speedo->ru);
}

/*******************************************************************//**
Shows the time elapsed and usage statistics since the last reset of a
speedo. */
UNIV_INTERN
void
speedo_show(
/*========*/
	const speedo_t*	speedo)	/*!< in: speedo */
{
	struct rusage	ru_now;
	struct timeval	tv_now;
	struct timeval	tv_diff;

	getrusage(RUSAGE_SELF, &ru_now);

	gettimeofday(&tv_now, NULL);

#define PRINT_TIMEVAL(prefix, tvp)		\
	fprintf(stderr, "%s% 5ld.%06ld sec\n",	\
		prefix, (tvp)->tv_sec, (tvp)->tv_usec)

	timersub(&tv_now, &speedo->tv, &tv_diff);
	PRINT_TIMEVAL("real", &tv_diff);

	timersub(&ru_now.ru_utime, &speedo->ru.ru_utime, &tv_diff);
	PRINT_TIMEVAL("user", &tv_diff);

	timersub(&ru_now.ru_stime, &speedo->ru.ru_stime, &tv_diff);
	PRINT_TIMEVAL("sys ", &tv_diff);
}

#endif /* UNIV_COMPILE_TEST_FUNCS */
