lib/libtnfprobe/tnf_trace.c

	tnf_trace.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 *  Copyright (c) 1994, by Sun Microsytems, Inc.
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

#ifndef DEBUG
#define NDEBUG  1
#endif

#include <stdlib.h>
#include <string.h>
#include <tnf/com.h>
#include <tnf/writer.h>
#include <tnf/probe.h>
#include <assert.h>

#include "tnf_types.h"
#include "tnf_trace.h"

#ifdef TNFWB_DEBUG
#ifdef _KERNEL
#error TNFWB_DEBUG
#else  /* _KERNEL */
#include <stdio.h>
#include <thread.h>
#endif /* _KERNEL */
#endif /* TNFW_DEBUG */


/*
 * Defines
 */

#ifdef _KERNEL
#define TNF_ASSERT(expr)    ASSERT(expr)
#else
#define TNF_ASSERT(expr)    assert(expr)
#endif

/*
 * New properties need for tracing
 */

static tnf_tag_data_t   **derived_tagarg_properties[] = {
    &TAG_DATA(tnf_derived),
    &TAG_DATA(tnf_tag_arg),
    0
};

static tnf_tag_data_t   ***derived_tagarg_properties_ptr =
                    derived_tagarg_properties;

/*
 * New derived types for probes
 */

TNF_STD_DERIVED_TAG(tnf_probe_event, tnf_tag,
        derived_tagarg_properties_ptr, TNF_OPAQUE);

TNF_STD_DERIVED_TAG(tnf_time_base, tnf_int64,
        tnf_derived_properties, TNF_INT64);

TNF_STD_DERIVED_TAG(tnf_time_delta, tnf_uint32,
        tnf_derived_properties, TNF_UINT32);

TNF_STD_DERIVED_TAG(tnf_pid, tnf_int32,
        tnf_derived_properties, TNF_INT32);

TNF_STD_DERIVED_TAG(tnf_lwpid, tnf_uint32,
        tnf_derived_properties, TNF_UINT32);

/*
 * Schedule records -CAUTION- keep in sync with tnf_internal.h
 * Note that tnf_schedule_prototype_t has different sizes for
 * kernel and user.
 */

static char *user_schedule_slot_names[] = {
    TNF_N_TAG,
    TNF_N_TID,
    TNF_N_LWPID,
    TNF_N_PID,
    TNF_N_TIME_BASE,
    0};

static tnf_tag_data_t   **user_schedule_slots[] = {
    &TAG_DATA(tnf_tag),     /* tag          */
    &TAG_DATA(tnf_uint32),      /* tid XXX      */
    &TAG_DATA(tnf_lwpid),       /* lwpid        */
    &TAG_DATA(tnf_pid),     /* pid          */
    &TAG_DATA(tnf_time_base),   /* time_base        */
    0};

TNF_STD_STRUCT_TAG(tnf_sched_rec,
        user_schedule_slots,
        user_schedule_slot_names,
        sizeof (tnf_schedule_prototype_t));

/*
 * Probe type record (metatag)
 */

static tnf_tag_data_t   **probe_type_slots[] = {
    &TAG_DATA(tnf_tag),
    &TAG_DATA(tnf_name),
    &TAG_DATA(tnf_properties),
    &TAG_DATA(tnf_slot_types),
    &TAG_DATA(tnf_type_size),
    &TAG_DATA(tnf_slot_names),
    &TAG_DATA(tnf_string),      /* detail */
    0};

TNF_STRUCT_TAG(tnf_probe_type,
        tnf_type_properties,
        probe_type_slots,
        0,
        sizeof (tnf_probe_prototype_t));

/*
 * export all tags
 */

TAG_EXPORT(tnf_probe_event);
TAG_EXPORT(tnf_time_base);
TAG_EXPORT(tnf_time_delta);
TAG_EXPORT(tnf_pid);
TAG_EXPORT(tnf_lwpid);

TAG_EXPORT(tnf_sched_rec);
TAG_EXPORT(tnf_probe_type);

/*
 * Write a schedule record
 * Can only be written in reusable data space.
 */

tnf_record_p
tnf_schedule_write(tnf_ops_t *ops, tnf_schedule_t *sched)
{
    tnf_tag_data_t *metatag_data;
    tnf_record_p metatag_index;
    tnf_schedule_prototype_t *buffer;

#ifdef _TNF_VERBOSE
    fprintf(stderr, "tnf_schedule_write: \n");
#endif
    /* Cannot be called when writing into tag space */
    TNF_ASSERT(ops->mode == TNF_ALLOC_REUSABLE);
    ALLOC(ops, sizeof (*buffer), buffer, sched->record_p, ops->mode);

    metatag_data = TAG_DATA(tnf_sched_rec);

    metatag_index = metatag_data->tag_index ?
        metatag_data->tag_index :
        metatag_data->tag_desc(ops, metatag_data);

    ASSIGN(buffer,  tag,        metatag_index);
    /* LINTED - tid is 32 bits */
    ASSIGN2(buffer, tid,        sched->tid,     uint32);
    /* LINTED - lwpid is 32 bits */
    ASSIGN(buffer,  lwpid,      sched->lwpid);
    /* LINTED - pid is 32 bits */
    ASSIGN(buffer,  pid,        sched->pid);
    ASSIGN(buffer,  time_base,  sched->time_base);

    /*
     * Remember schedule record generation number so the distance
     * in virtual space can be calculated from an event record
     */
    sched->record_gen = ((tnf_block_header_t *)
        ((uintptr_t)buffer & TNF_BLOCK_MASK))->generation;
    /* Cannot have been written into tag space */
    TNF_ASSERT(sched->record_gen != TNF_TAG_GENERATION_NUM);

    return ((tnf_record_p) buffer);
}