a0a7328bb0
- Provide TUNABLE_INT() hooks for ktr_cpumask, ktr_mask, and ktr_verbose so that they can be set from the loader by their respective sysctl names. For example, to turn on KTR_INTR and KTR_PROC in ktr_mask, one could stick 'debug.ktr.mask="0x1200"' in /boot/loader.conf.
270 lines
6.4 KiB
C
270 lines
6.4 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_ddb.h"
|
|
#include "opt_ktr.h"
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/types.h>
|
|
#include <sys/cons.h>
|
|
#include <sys/time.h>
|
|
#include <sys/kernel.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>
|
|
|
|
#include <ddb/ddb.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
|
|
#define KTR_EXTEND_DEFAULT 1
|
|
#else
|
|
#define KTR_EXTEND_DEFAULT 0
|
|
#endif
|
|
|
|
#ifdef KTR_VERBOSE
|
|
#define KTR_VERBOSE_DEFAULT 1
|
|
#else
|
|
#define KTR_VERBOSE_DEFAULT 0
|
|
#endif
|
|
|
|
SYSCTL_NODE(_debug, OID_AUTO, ktr, CTLFLAG_RD, 0, "KTR options");
|
|
|
|
/*
|
|
* This variable is used only by gdb to work out what fields are in
|
|
* ktr_entry.
|
|
*/
|
|
int ktr_extend = KTR_EXTEND_DEFAULT;
|
|
SYSCTL_INT(_debug_ktr, OID_AUTO, extend, CTLFLAG_RD, &ktr_extend, 0, "");
|
|
|
|
int ktr_cpumask;
|
|
TUNABLE_INT_DECL("debug.ktr.cpumask", KTR_CPUMASK, ktr_cpumask);
|
|
SYSCTL_INT(_debug_ktr, OID_AUTO, cpumask, CTLFLAG_RW, &ktr_cpumask, 0, "");
|
|
|
|
int ktr_mask;
|
|
TUNABLE_INT_DECL("debug.ktr.mask", KTR_MASK, ktr_mask);
|
|
SYSCTL_INT(_debug_ktr, OID_AUTO, mask, CTLFLAG_RW, &ktr_mask, 0, "");
|
|
|
|
int ktr_entries = KTR_ENTRIES;
|
|
SYSCTL_INT(_debug_ktr, OID_AUTO, entries, CTLFLAG_RD, &ktr_entries, 0, "");
|
|
|
|
volatile int ktr_idx = 0;
|
|
struct ktr_entry ktr_buf[KTR_ENTRIES];
|
|
|
|
int ktr_verbose;
|
|
TUNABLE_INT_DECL("debug.ktr.verbose", KTR_VERBOSE_DEFAULT, ktr_verbose);
|
|
SYSCTL_INT(_debug_ktr, OID_AUTO, 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 (panicstr)
|
|
return;
|
|
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);
|
|
if (ktr_mask & KTR_LOCK)
|
|
/*
|
|
* We can't use nanotime with KTR_LOCK, it would cause
|
|
* endless recursion, at least under the Intel
|
|
* architecture.
|
|
*/
|
|
getnanotime(&entry->ktr_tv);
|
|
else
|
|
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
|
|
}
|
|
|
|
#ifdef DDB
|
|
|
|
struct tstate {
|
|
int cur;
|
|
int first;
|
|
};
|
|
static struct tstate tstate;
|
|
static int db_ktr_verbose;
|
|
static int db_mach_vtrace(void);
|
|
|
|
DB_COMMAND(tbuf, db_mach_tbuf)
|
|
{
|
|
|
|
tstate.cur = (ktr_idx - 1) & (KTR_ENTRIES - 1);
|
|
tstate.first = -1;
|
|
if (strcmp(modif, "v") == 0)
|
|
db_ktr_verbose = 1;
|
|
else
|
|
db_ktr_verbose = 0;
|
|
db_mach_vtrace();
|
|
|
|
return;
|
|
}
|
|
|
|
DB_COMMAND(tall, db_mach_tall)
|
|
{
|
|
int c;
|
|
|
|
db_mach_tbuf(addr, have_addr, count, modif);
|
|
while (db_mach_vtrace()) {
|
|
c = cncheckc();
|
|
if (c != -1)
|
|
break;
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
DB_COMMAND(tnext, db_mach_tnext)
|
|
{
|
|
|
|
if (strcmp(modif, "v") == 0)
|
|
db_ktr_verbose ^= 1;
|
|
db_mach_vtrace();
|
|
}
|
|
|
|
static int
|
|
db_mach_vtrace(void)
|
|
{
|
|
struct ktr_entry *kp;
|
|
|
|
if (tstate.cur == tstate.first) {
|
|
db_printf("--- End of trace buffer ---\n");
|
|
return (0);
|
|
}
|
|
kp = &ktr_buf[tstate.cur];
|
|
|
|
/* Skip over unused entries. */
|
|
#ifdef KTR_EXTEND
|
|
if (kp->ktr_desc[0] != '\0') {
|
|
#else
|
|
if (kp->ktr_desc != NULL) {
|
|
#endif
|
|
db_printf("%d: ", tstate.cur);
|
|
if (db_ktr_verbose)
|
|
db_printf("%4ld.%06ld ", kp->ktr_tv.tv_sec,
|
|
kp->ktr_tv.tv_nsec / 1000);
|
|
#ifdef KTR_EXTEND
|
|
#ifdef SMP
|
|
db_printf("cpu%d ", kp->ktr_cpu);
|
|
#endif
|
|
if (db_ktr_verbose)
|
|
db_printf("%s.%d\t", kp->ktr_filename, kp->ktr_line);
|
|
db_printf("%s", kp->ktr_desc);
|
|
#else
|
|
db_printf(kp->ktr_desc, kp->ktr_parm1, kp->ktr_parm2,
|
|
kp->ktr_parm3, kp->ktr_parm4, kp->ktr_parm5);
|
|
#endif
|
|
db_printf("\n");
|
|
}
|
|
|
|
if (tstate.first == -1)
|
|
tstate.first = tstate.cur;
|
|
|
|
if (--tstate.cur < 0)
|
|
tstate.cur = KTR_ENTRIES - 1;
|
|
|
|
return (1);
|
|
}
|
|
|
|
#endif /* DDB */
|
|
#endif /* KTR */
|