mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-25 11:37:56 +00:00
0959cc6680
voices in my head. You can sue the voices in Bill Paul's head all you want. Noticed by: jhb
154 lines
4.4 KiB
C
154 lines
4.4 KiB
C
/*
|
|
* Copyright (c) 2000
|
|
* John Baldwin <jhb@FreeBSD.org>. All rights reserved.
|
|
*
|
|
* 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.
|
|
* 4. Neither the name of the author nor the names of any co-contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY JOHN BALDWIN 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 JOHN BALDWIN OR THE VOICES IN HIS HEAD
|
|
* 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.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
/*
|
|
* This module holds the global variables used by KTR and the ktr_tracepoint()
|
|
* function that does the actual tracing.
|
|
*/
|
|
|
|
#include "opt_ktr.h"
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/time.h>
|
|
#include <sys/ktr.h>
|
|
#include <sys/libkern.h>
|
|
#include <sys/linker_set.h>
|
|
#include <sys/sysctl.h>
|
|
#include <sys/systm.h>
|
|
#include <machine/globals.h>
|
|
#include <machine/stdarg.h>
|
|
|
|
#ifndef KTR_MASK
|
|
#define KTR_MASK (KTR_GEN)
|
|
#endif
|
|
|
|
#ifndef KTR_CPUMASK
|
|
#define KTR_CPUMASK (~0)
|
|
#endif
|
|
|
|
#ifdef SMP
|
|
#define KTR_CPU cpuid
|
|
#else
|
|
#define KTR_CPU 0
|
|
#endif
|
|
|
|
#ifdef KTR_EXTEND
|
|
/*
|
|
* This variable is used only by gdb to work out what fields are in
|
|
* ktr_entry.
|
|
*/
|
|
int ktr_extend = 1;
|
|
SYSCTL_INT(_debug, OID_AUTO, ktr_extend, CTLFLAG_RD, &ktr_extend, 1, "");
|
|
#else
|
|
int ktr_extend = 0;
|
|
SYSCTL_INT(_debug, OID_AUTO, ktr_extend, CTLFLAG_RD, &ktr_extend, 0, "");
|
|
#endif /* KTR_EXTEND */
|
|
|
|
int ktr_cpumask = KTR_CPUMASK;
|
|
SYSCTL_INT(_debug, OID_AUTO, ktr_cpumask, CTLFLAG_RW, &ktr_cpumask, KTR_CPUMASK, "");
|
|
|
|
int ktr_mask = KTR_MASK;
|
|
SYSCTL_INT(_debug, OID_AUTO, ktr_mask, CTLFLAG_RW, &ktr_mask, KTR_MASK, "");
|
|
|
|
int ktr_entries = KTR_ENTRIES;
|
|
SYSCTL_INT(_debug, OID_AUTO, ktr_entries, CTLFLAG_RD, &ktr_entries, KTR_ENTRIES, "");
|
|
|
|
volatile int ktr_idx = 0;
|
|
struct ktr_entry ktr_buf[KTR_ENTRIES];
|
|
|
|
#ifdef KTR_VERBOSE
|
|
int ktr_verbose = 1;
|
|
#else
|
|
int ktr_verbose = 0;
|
|
#endif
|
|
SYSCTL_INT(_debug, OID_AUTO, ktr_verbose, CTLFLAG_RW, &ktr_verbose, 0, "");
|
|
|
|
#ifdef KTR
|
|
#ifdef KTR_EXTEND
|
|
void
|
|
ktr_tracepoint(u_int mask, char *filename, u_int line, char *format, ...)
|
|
#else
|
|
void
|
|
ktr_tracepoint(u_int mask, char *format, u_long arg1, u_long arg2, u_long arg3,
|
|
u_long arg4, u_long arg5)
|
|
#endif
|
|
{
|
|
struct ktr_entry *entry;
|
|
int newindex, saveindex, saveintr;
|
|
#ifdef KTR_EXTEND
|
|
va_list ap;
|
|
#endif
|
|
|
|
if ((ktr_mask & mask) == 0)
|
|
return;
|
|
#ifdef KTR_EXTEND
|
|
if (((1 << KTR_CPU) & ktr_cpumask) == 0)
|
|
return;
|
|
#endif
|
|
saveintr = save_intr();
|
|
disable_intr();
|
|
do {
|
|
saveindex = ktr_idx;
|
|
newindex = (saveindex + 1) & (KTR_ENTRIES - 1);
|
|
} while (atomic_cmpset_rel_int(&ktr_idx, saveindex, newindex) == 0);
|
|
entry = &ktr_buf[saveindex];
|
|
restore_intr(saveintr);
|
|
nanotime(&entry->ktr_tv);
|
|
#ifdef KTR_EXTEND
|
|
strncpy(entry->ktr_filename, filename, KTRFILENAMESIZE - 1);
|
|
entry->ktr_filename[KTRFILENAMESIZE - 1] = '\0';
|
|
entry->ktr_line = line;
|
|
entry->ktr_cpu = KTR_CPU;
|
|
va_start(ap, format);
|
|
vsnprintf(entry->ktr_desc, KTRDESCSIZE, format, ap);
|
|
va_end(ap);
|
|
if (ktr_verbose) {
|
|
#ifdef SMP
|
|
printf("cpu%d ", entry->ktr_cpu);
|
|
#endif
|
|
if (ktr_verbose > 1)
|
|
printf("%s.%d\t", entry->ktr_filename, entry->ktr_line);
|
|
va_start(ap, format);
|
|
vprintf(format, ap);
|
|
printf("\n");
|
|
va_end(ap);
|
|
}
|
|
#else
|
|
entry->ktr_desc = format;
|
|
entry->ktr_parm1 = arg1;
|
|
entry->ktr_parm2 = arg2;
|
|
entry->ktr_parm3 = arg3;
|
|
entry->ktr_parm4 = arg4;
|
|
entry->ktr_parm5 = arg5;
|
|
#endif
|
|
}
|
|
#endif /* KTR */
|