/*-
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Copyright (c) 2003-2008, Joseph Koshy
 * Copyright (c) 2007 The FreeBSD Foundation
 * All rights reserved.
 * Copyright (c) 2018, Matthew Macy
 *
 * Portions of this software were developed by A. Joseph Koshy under
 * sponsorship from the FreeBSD Foundation and Google, Inc.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/param.h>
#include <sys/cpuset.h>
#include <sys/event.h>
#include <sys/queue.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/sysctl.h>
#include <sys/time.h>
#include <sys/ttycom.h>
#include <sys/user.h>
#include <sys/wait.h>

#include <assert.h>
#include <curses.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <getopt.h>
#include <kvm.h>
#include <libgen.h>
#include <limits.h>
#include <locale.h>
#include <math.h>
#include <pmc.h>
#include <pmclog.h>
#include <regex.h>
#include <signal.h>
#include <stdarg.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>
#include <unistd.h>

#include <libpmcstat.h>
#include "cmd_pmc.h"

static struct pmcstat_stats pmcstat_stats;      /* statistics */

static struct pmc_plugins plugins[] = {
        {
                .pl_name = "none",
        },
        {
                .pl_name = NULL
        }
};

int
pmc_util_get_pid(struct pmcstat_args *args)
{
        struct pmcstat_target *pt;

        assert(args->pa_flags & FLAG_HAS_COMMANDLINE);

        /*
         * If a command line was specified, it would be the very first
         * in the list, before any other processes specified by -t.
         */
        pt = SLIST_FIRST(&args->pa_targets);
        return (pt->pt_pid);
}

void
pmc_util_kill_process(struct pmcstat_args *args)
{
        struct pmcstat_target *pt;

        assert(args->pa_flags & FLAG_HAS_COMMANDLINE);

        /*
         * If a command line was specified, it would be the very first
         * in the list, before any other processes specified by -t.
         */
        pt = SLIST_FIRST(&args->pa_targets);
        assert(pt != NULL);

        if (kill(pt->pt_pid, SIGINT) != 0)
                err(EX_OSERR, "ERROR: cannot signal child process");
}

void
pmc_util_shutdown_logging(struct pmcstat_args *args)
{
        pmcstat_shutdown_logging(args, plugins, &pmcstat_stats);
}

void
pmc_util_cleanup(struct pmcstat_args *args)
{
        struct pmcstat_ev *ev;

        /* release allocated PMCs. */
        STAILQ_FOREACH(ev, &args->pa_events, ev_next)
            if (ev->ev_pmcid != PMC_ID_INVALID) {
                if (pmc_stop(ev->ev_pmcid) < 0)
                        err(EX_OSERR,
                            "ERROR: cannot stop pmc 0x%x \"%s\"",
                            ev->ev_pmcid, ev->ev_name);
                if (pmc_release(ev->ev_pmcid) < 0)
                        err(EX_OSERR,
                            "ERROR: cannot release pmc 0x%x \"%s\"",
                            ev->ev_pmcid, ev->ev_name);
        }
        /* de-configure the log file if present. */
        if (args->pa_flags & (FLAG_HAS_PIPE | FLAG_HAS_OUTPUT_LOGFILE))
                (void)pmc_configure_logfile(-1);

        if (args->pa_logparser) {
                pmclog_close(args->pa_logparser);
                args->pa_logparser = NULL;
        }
        pmc_util_shutdown_logging(args);
}

void
pmc_util_start_pmcs(struct pmcstat_args *args)
{
        struct pmcstat_ev *ev;

        STAILQ_FOREACH(ev, &args->pa_events, ev_next) {

                assert(ev->ev_pmcid != PMC_ID_INVALID);

                if (pmc_start(ev->ev_pmcid) < 0) {
                        warn("ERROR: Cannot start pmc 0x%x \"%s\"",
                            ev->ev_pmcid, ev->ev_name);
                        pmc_util_cleanup(args);
                        exit(EX_OSERR);
                }
        }
}