kernel - Stop KTR logging during panic
[dragonfly.git] / sys / kern / kern_ktr.c
CommitLineData
d3776285
MD
1/*
2 * Copyright (c) 2005 The DragonFly Project. All rights reserved.
3 *
4 * This code is derived from software contributed to The DragonFly Project
5 * by Matthew Dillon <dillon@backplane.com>
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
16 * distribution.
17 * 3. Neither the name of The DragonFly Project nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific, prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34/*
35 * The following copyright applies to the DDB command code:
36 *
81540c2d
EN
37 * Copyright (c) 2000 John Baldwin <jhb@FreeBSD.org>
38 * All rights reserved.
39 *
40 * Redistribution and use in source and binary forms, with or without
41 * modification, are permitted provided that the following conditions
42 * are met:
43 * 1. Redistributions of source code must retain the above copyright
44 * notice, this list of conditions and the following disclaimer.
45 * 2. Redistributions in binary form must reproduce the above copyright
46 * notice, this list of conditions and the following disclaimer in the
47 * documentation and/or other materials provided with the distribution.
48 * 3. Neither the name of the author nor the names of any co-contributors
49 * may be used to endorse or promote products derived from this software
50 * without specific prior written permission.
51 *
52 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
53 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
54 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
55 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
56 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
57 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
58 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
59 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
60 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
61 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
62 * SUCH DAMAGE.
63 */
6d22945a 64
81540c2d 65/*
d3776285 66 * Kernel tracepoint facility.
81540c2d
EN
67 */
68
69#include "opt_ddb.h"
70#include "opt_ktr.h"
71
72#include <sys/param.h>
73#include <sys/cons.h>
74#include <sys/kernel.h>
81540c2d
EN
75#include <sys/libkern.h>
76#include <sys/proc.h>
77#include <sys/sysctl.h>
d3776285 78#include <sys/ktr.h>
81540c2d
EN
79#include <sys/systm.h>
80#include <sys/time.h>
8e273a1d 81#include <sys/malloc.h>
c2751817 82#include <sys/spinlock.h>
8e273a1d 83#include <sys/thread2.h>
c2751817 84#include <sys/spinlock2.h>
8e273a1d 85#include <sys/ctype.h>
81540c2d
EN
86
87#include <machine/cpu.h>
88#include <machine/cpufunc.h>
89#include <machine/specialreg.h>
90#include <machine/md_var.h>
91
92#include <ddb/ddb.h>
93
94#ifndef KTR_ENTRIES
d3776285 95#define KTR_ENTRIES 2048
6d22945a
SW
96#elif (KTR_ENTRIES & KTR_ENTRIES - 1)
97#error KTR_ENTRIES must be a power of two
81540c2d 98#endif
d3776285 99#define KTR_ENTRIES_MASK (KTR_ENTRIES - 1)
81540c2d 100
96328d40
MD
101/*
102 * test logging support. When ktr_testlogcnt is non-zero each synchronization
0b698dca 103 * interrupt will issue six back-to-back ktr logging messages on cpu 0
96328d40
MD
104 * so the user can determine KTR logging overheads.
105 */
106#if !defined(KTR_TESTLOG)
107#define KTR_TESTLOG KTR_ALL
108#endif
109KTR_INFO_MASTER(testlog);
8cb417fa 110#if KTR_TESTLOG
5bf48697
AE
111KTR_INFO(KTR_TESTLOG, testlog, test1, 0, "test1 %d %d %d %d", int dummy1, int dummy2, int dummy3, int dummy4);
112KTR_INFO(KTR_TESTLOG, testlog, test2, 1, "test2 %d %d %d %d", int dummy1, int dummy2, int dummy3, int dummy4);
113KTR_INFO(KTR_TESTLOG, testlog, test3, 2, "test3 %d %d %d %d", int dummy1, int dummy2, int dummy3, int dummy4);
114KTR_INFO(KTR_TESTLOG, testlog, test4, 3, "test4");
115KTR_INFO(KTR_TESTLOG, testlog, test5, 4, "test5");
116KTR_INFO(KTR_TESTLOG, testlog, test6, 5, "test6");
c2751817 117#ifdef SMP
5bf48697
AE
118KTR_INFO(KTR_TESTLOG, testlog, pingpong, 6, "pingpong");
119KTR_INFO(KTR_TESTLOG, testlog, pipeline, 7, "pipeline");
120KTR_INFO(KTR_TESTLOG, testlog, crit_beg, 8, "crit_beg");
121KTR_INFO(KTR_TESTLOG, testlog, crit_end, 9, "crit_end");
122KTR_INFO(KTR_TESTLOG, testlog, spin_beg, 10, "spin_beg");
123KTR_INFO(KTR_TESTLOG, testlog, spin_end, 11, "spin_end");
0d1d845c 124#endif
96328d40 125#define logtest(name) KTR_LOG(testlog_ ## name, 0, 0, 0, 0)
0b698dca 126#define logtest_noargs(name) KTR_LOG(testlog_ ## name)
8cb417fa 127#endif
96328d40 128
8e273a1d
EN
129MALLOC_DEFINE(M_KTR, "ktr", "ktr buffers");
130
d3776285 131SYSCTL_NODE(_debug, OID_AUTO, ktr, CTLFLAG_RW, 0, "ktr");
81540c2d 132
ffc26552 133int ktr_entries = KTR_ENTRIES;
f22af1e9
SW
134SYSCTL_INT(_debug_ktr, OID_AUTO, entries, CTLFLAG_RD, &ktr_entries, 0,
135 "Size of the event buffer");
81540c2d 136
ffc26552 137int ktr_version = KTR_VERSION;
81540c2d
EN
138SYSCTL_INT(_debug_ktr, OID_AUTO, version, CTLFLAG_RD, &ktr_version, 0, "");
139
af6ff89e
MD
140static int ktr_stacktrace = 1;
141SYSCTL_INT(_debug_ktr, OID_AUTO, stacktrace, CTLFLAG_RD, &ktr_stacktrace, 0, "");
142
374133e3 143static int ktr_resynchronize = 0;
f22af1e9
SW
144SYSCTL_INT(_debug_ktr, OID_AUTO, resynchronize, CTLFLAG_RW,
145 &ktr_resynchronize, 0, "Resynchronize TSC 10 times a second");
374133e3 146
96328d40
MD
147#if KTR_TESTLOG
148static int ktr_testlogcnt = 0;
149SYSCTL_INT(_debug_ktr, OID_AUTO, testlogcnt, CTLFLAG_RW, &ktr_testlogcnt, 0, "");
72d379df 150static int ktr_testipicnt = 0;
0d1d845c 151#ifdef SMP
72d379df 152static int ktr_testipicnt_remainder;
0d1d845c 153#endif
72d379df 154SYSCTL_INT(_debug_ktr, OID_AUTO, testipicnt, CTLFLAG_RW, &ktr_testipicnt, 0, "");
c2751817
MD
155static int ktr_testcritcnt = 0;
156SYSCTL_INT(_debug_ktr, OID_AUTO, testcritcnt, CTLFLAG_RW, &ktr_testcritcnt, 0, "");
157static int ktr_testspincnt = 0;
158SYSCTL_INT(_debug_ktr, OID_AUTO, testspincnt, CTLFLAG_RW, &ktr_testspincnt, 0, "");
96328d40
MD
159#endif
160
d3776285
MD
161/*
162 * Give cpu0 a static buffer so the tracepoint facility can be used during
163 * early boot (note however that we still use a critical section, XXX).
164 */
165static struct ktr_entry ktr_buf0[KTR_ENTRIES];
ddca1582
MD
166
167__cachealign struct ktr_cpu ktr_cpu[MAXCPU] = {
168 { .core.ktr_buf = &ktr_buf0[0] }
169};
170
0b698dca 171#ifdef SMP
374133e3 172static int64_t ktr_sync_tsc;
0b698dca 173#endif
374133e3
MD
174struct callout ktr_resync_callout;
175
81540c2d
EN
176#ifdef KTR_VERBOSE
177int ktr_verbose = KTR_VERBOSE;
178TUNABLE_INT("debug.ktr.verbose", &ktr_verbose);
f22af1e9
SW
179SYSCTL_INT(_debug_ktr, OID_AUTO, verbose, CTLFLAG_RW, &ktr_verbose, 0,
180 "Log events to the console as well");
81540c2d
EN
181#endif
182
ba39e2e0
MD
183static void ktr_resync_callback(void *dummy __unused);
184
c2751817 185extern int64_t tsc_offsets[];
0b698dca 186
81540c2d
EN
187static void
188ktr_sysinit(void *dummy)
189{
ddca1582 190 struct ktr_cpu_core *kcpu;
8e273a1d
EN
191 int i;
192
d3776285 193 for(i = 1; i < ncpus; ++i) {
ddca1582
MD
194 kcpu = &ktr_cpu[i].core;
195 kcpu->ktr_buf = kmalloc(KTR_ENTRIES * sizeof(struct ktr_entry),
196 M_KTR, M_WAITOK | M_ZERO);
8e273a1d 197 }
bf0ecf68 198 callout_init_mp(&ktr_resync_callout);
ba39e2e0 199 callout_reset(&ktr_resync_callout, hz / 10, ktr_resync_callback, NULL);
81540c2d 200}
ba39e2e0 201SYSINIT(ktr_sysinit, SI_BOOT2_KLD, SI_ORDER_ANY, ktr_sysinit, NULL);
374133e3 202
374133e3
MD
203/*
204 * Try to resynchronize the TSC's for all cpus. This is really, really nasty.
205 * We have to send an IPIQ message to all remote cpus, wait until they
206 * get into their IPIQ processing code loop, then do an even stricter hard
207 * loop to get the cpus as close to synchronized as we can to get the most
208 * accurate reading.
209 *
210 * This callback occurs on cpu0.
211 */
8cb417fa 212#if KTR_TESTLOG
0d1d845c 213#ifdef SMP
72d379df 214static void ktr_pingpong_remote(void *dummy);
c2751817 215static void ktr_pipeline_remote(void *dummy);
8cb417fa 216#endif
0d1d845c 217#endif
374133e3 218
527fddf7 219#if defined(SMP) && defined(_RDTSC_SUPPORTED_)
b4c3db6f
MD
220
221static void ktr_resync_remote(void *dummy);
374133e3
MD
222extern cpumask_t smp_active_mask;
223
224/*
225 * We use a callout callback instead of a systimer because we cannot afford
226 * to preempt anyone to do this, or we might deadlock a spin-lock or
227 * serializer between two cpus.
228 */
229static
230void
231ktr_resync_callback(void *dummy __unused)
232{
f697b97d 233 struct lwkt_cpusync cs;
ef4b87ee 234#if KTR_TESTLOG
374133e3 235 int count;
ef4b87ee 236#endif
374133e3
MD
237
238 KKASSERT(mycpu->gd_cpuid == 0);
96328d40
MD
239
240#if KTR_TESTLOG
241 /*
242 * Test logging
243 */
244 if (ktr_testlogcnt) {
245 --ktr_testlogcnt;
246 cpu_disable_intr();
247 logtest(test1);
248 logtest(test2);
249 logtest(test3);
0b698dca
MD
250 logtest_noargs(test4);
251 logtest_noargs(test5);
252 logtest_noargs(test6);
96328d40
MD
253 cpu_enable_intr();
254 }
72d379df
MD
255
256 /*
257 * Test IPI messaging
258 */
259 if (ktr_testipicnt && ktr_testipicnt_remainder == 0 && ncpus > 1) {
260 ktr_testipicnt_remainder = ktr_testipicnt;
261 ktr_testipicnt = 0;
262 lwkt_send_ipiq_bycpu(1, ktr_pingpong_remote, NULL);
263 }
c2751817
MD
264
265 /*
266 * Test critical sections
267 */
268 if (ktr_testcritcnt) {
269 crit_enter();
270 crit_exit();
271 logtest_noargs(crit_beg);
272 for (count = ktr_testcritcnt; count; --count) {
273 crit_enter();
274 crit_exit();
275 }
276 logtest_noargs(crit_end);
277 ktr_testcritcnt = 0;
278 }
279
280 /*
281 * Test spinlock sections
282 */
283 if (ktr_testspincnt) {
284 struct spinlock spin;
285
286 spin_init(&spin);
287a8577
AH
287 spin_lock(&spin);
288 spin_unlock(&spin);
c2751817
MD
289 logtest_noargs(spin_beg);
290 for (count = ktr_testspincnt; count; --count) {
287a8577
AH
291 spin_lock(&spin);
292 spin_unlock(&spin);
d666840a
MD
293 }
294 logtest_noargs(spin_end);
c2751817
MD
295 ktr_testspincnt = 0;
296 }
96328d40
MD
297#endif
298
299 /*
300 * Resynchronize the TSC
301 */
374133e3
MD
302 if (ktr_resynchronize == 0)
303 goto done;
304 if ((cpu_feature & CPUID_TSC) == 0)
305 return;
0b698dca 306
374133e3 307 crit_enter();
f697b97d
MD
308 lwkt_cpusync_init(&cs, smp_active_mask, ktr_resync_remote,
309 (void *)(intptr_t)mycpu->gd_cpuid);
310 lwkt_cpusync_interlock(&cs);
374133e3 311 ktr_sync_tsc = rdtsc();
f697b97d 312 lwkt_cpusync_deinterlock(&cs);
374133e3 313 crit_exit();
374133e3
MD
314done:
315 callout_reset(&ktr_resync_callout, hz / 10, ktr_resync_callback, NULL);
316}
317
0b698dca 318/*
f697b97d
MD
319 * The remote-end of the KTR synchronization protocol runs on all cpus.
320 * The one we run on the controlling cpu updates its tsc continuously
321 * until the others have finished syncing (theoretically), but we don't
322 * loop forever.
323 *
324 * This is a bit ad-hoc but we need to avoid livelocking inside an IPI
325 * callback. rdtsc() is a synchronizing instruction (I think).
0b698dca 326 */
374133e3 327static void
f697b97d 328ktr_resync_remote(void *arg)
374133e3 329{
f697b97d
MD
330 globaldata_t gd = mycpu;
331 int64_t delta;
332 int i;
374133e3 333
f697b97d
MD
334 if (gd->gd_cpuid == (int)(intptr_t)arg) {
335 for (i = 0; i < 2000; ++i)
336 ktr_sync_tsc = rdtsc();
337 } else {
338 delta = rdtsc() - ktr_sync_tsc;
339 if (tsc_offsets[gd->gd_cpuid] == 0)
340 tsc_offsets[gd->gd_cpuid] = delta;
341 tsc_offsets[gd->gd_cpuid] =
342 (tsc_offsets[gd->gd_cpuid] * 7 + delta) / 8;
374133e3 343 }
374133e3 344}
81540c2d 345
8cb417fa
MD
346#if KTR_TESTLOG
347
72d379df
MD
348static
349void
350ktr_pingpong_remote(void *dummy __unused)
351{
c2751817
MD
352 int other_cpu;
353
72d379df 354 logtest_noargs(pingpong);
c2751817 355 other_cpu = 1 - mycpu->gd_cpuid;
72d379df
MD
356 if (ktr_testipicnt_remainder) {
357 --ktr_testipicnt_remainder;
c2751817
MD
358 lwkt_send_ipiq_bycpu(other_cpu, ktr_pingpong_remote, NULL);
359 } else {
360 lwkt_send_ipiq_bycpu(other_cpu, ktr_pipeline_remote, NULL);
361 lwkt_send_ipiq_bycpu(other_cpu, ktr_pipeline_remote, NULL);
362 lwkt_send_ipiq_bycpu(other_cpu, ktr_pipeline_remote, NULL);
363 lwkt_send_ipiq_bycpu(other_cpu, ktr_pipeline_remote, NULL);
364 lwkt_send_ipiq_bycpu(other_cpu, ktr_pipeline_remote, NULL);
72d379df
MD
365 }
366}
367
c2751817
MD
368static
369void
370ktr_pipeline_remote(void *dummy __unused)
371{
372 logtest_noargs(pipeline);
373}
374
8cb417fa
MD
375#endif
376
0b698dca
MD
377#else /* !SMP */
378
379/*
380 * The resync callback for UP doesn't do anything other then run the test
381 * log messages. If test logging is not enabled, don't bother resetting
382 * the callout.
383 */
384static
385void
386ktr_resync_callback(void *dummy __unused)
387{
388#if KTR_TESTLOG
389 /*
390 * Test logging
391 */
392 if (ktr_testlogcnt) {
393 --ktr_testlogcnt;
394 cpu_disable_intr();
395 logtest(test1);
396 logtest(test2);
397 logtest(test3);
398 logtest_noargs(test4);
399 logtest_noargs(test5);
400 logtest_noargs(test6);
401 cpu_enable_intr();
402 }
403 callout_reset(&ktr_resync_callout, hz / 10, ktr_resync_callback, NULL);
404#endif
405}
406
374133e3 407#endif
81540c2d 408
0b698dca 409/*
5bf48697
AE
410 * Setup the next empty slot and return it to the caller to store the data
411 * directly.
0b698dca 412 */
5bf48697
AE
413struct ktr_entry *
414ktr_begin_write_entry(struct ktr_info *info, const char *file, int line)
81540c2d 415{
ddca1582 416 struct ktr_cpu_core *kcpu;
81540c2d 417 struct ktr_entry *entry;
d3776285
MD
418 int cpu;
419
420 cpu = mycpu->gd_cpuid;
ddca1582 421 kcpu = &ktr_cpu[cpu].core;
ab1b4385
MD
422 if (panicstr) /* stop logging during panic */
423 return NULL;
424 if (kcpu->ktr_buf == NULL) /* too early in boot */
5bf48697 425 return NULL;
b4cb74b5
SW
426
427 crit_enter();
ddca1582
MD
428 entry = kcpu->ktr_buf + (kcpu->ktr_idx & KTR_ENTRIES_MASK);
429 ++kcpu->ktr_idx;
527fddf7 430#ifdef _RDTSC_SUPPORTED_
b4cb74b5 431 if (cpu_feature & CPUID_TSC) {
0b698dca 432#ifdef SMP
b4cb74b5 433 entry->ktr_timestamp = rdtsc() - tsc_offsets[cpu];
0b698dca 434#else
b4cb74b5 435 entry->ktr_timestamp = rdtsc();
0b698dca 436#endif
527fddf7
MD
437 } else
438#endif
439 {
b4cb74b5 440 entry->ktr_timestamp = get_approximate_time_t();
8e273a1d 441 }
b4cb74b5
SW
442 entry->ktr_info = info;
443 entry->ktr_file = file;
444 entry->ktr_line = line;
445 crit_exit();
5bf48697
AE
446 return entry;
447}
448
449int
450ktr_finish_write_entry(struct ktr_info *info, struct ktr_entry *entry)
451{
b4cb74b5
SW
452 if (ktr_stacktrace)
453 cpu_ktr_caller(entry);
81540c2d 454#ifdef KTR_VERBOSE
d3776285 455 if (ktr_verbose && info->kf_format) {
81540c2d 456#ifdef SMP
5bf48697 457 kprintf("cpu%d ", mycpu->gd_cpuid);
81540c2d
EN
458#endif
459 if (ktr_verbose > 1) {
6ea70f76 460 kprintf("%s.%d\t", entry->ktr_file, entry->ktr_line);
81540c2d 461 }
5bf48697 462 return !0;
81540c2d
EN
463 }
464#endif
5bf48697 465 return 0;
d3776285
MD
466}
467
81540c2d
EN
468#ifdef DDB
469
8e273a1d 470#define NUM_LINES_PER_PAGE 19
81540c2d
EN
471
472struct tstate {
473 int cur;
474 int first;
475};
d3776285 476
81540c2d 477static int db_ktr_verbose;
d3776285 478static int db_mach_vtrace(int cpu, struct ktr_entry *kp, int idx);
81540c2d
EN
479
480DB_SHOW_COMMAND(ktr, db_ktr_all)
481{
ddca1582 482 struct ktr_cpu_core *kcpu;
8e273a1d
EN
483 int a_flag = 0;
484 int c;
81540c2d 485 int nl = 0;
8e273a1d
EN
486 int i;
487 struct tstate tstate[MAXCPU];
488 int printcpu = -1;
489
490 for(i = 0; i < ncpus; i++) {
ddca1582 491 kcpu = &ktr_cpu[i].core;
8e273a1d 492 tstate[i].first = -1;
ddca1582 493 tstate[i].cur = (kcpu->ktr_idx - 1) & KTR_ENTRIES_MASK;
8e273a1d
EN
494 }
495 db_ktr_verbose = 0;
496 while ((c = *(modif++)) != '\0') {
497 if (c == 'v') {
498 db_ktr_verbose = 1;
499 }
500 else if (c == 'a') {
501 a_flag = 1;
81540c2d 502 }
8e273a1d
EN
503 else if (c == 'c') {
504 printcpu = 0;
505 while ((c = *(modif++)) != '\0') {
506 if (isdigit(c)) {
507 printcpu *= 10;
508 printcpu += c - '0';
509 }
510 else {
511 modif++;
512 break;
513 }
514 }
515 modif--;
81540c2d
EN
516 }
517 }
8e273a1d
EN
518 if (printcpu > ncpus - 1) {
519 db_printf("Invalid cpu number\n");
520 return;
521 }
522 /*
523 * Lopp throug all the buffers and print the content of them, sorted
524 * by the timestamp.
525 */
526 while (1) {
527 int counter;
528 u_int64_t highest_ts;
529 int highest_cpu;
530 struct ktr_entry *kp;
531
532 if (a_flag == 1 && cncheckc() != -1)
533 return;
534 highest_ts = 0;
535 highest_cpu = -1;
536 /*
537 * Find the lowest timestamp
538 */
539 for (i = 0, counter = 0; i < ncpus; i++) {
ddca1582
MD
540 kcpu = &ktr_cpu[i].core;
541 if (kcpu->ktr_buf == NULL)
d3776285 542 continue;
8e273a1d
EN
543 if (printcpu != -1 && printcpu != i)
544 continue;
545 if (tstate[i].cur == -1) {
546 counter++;
547 if (counter == ncpus) {
548 db_printf("--- End of trace buffer ---\n");
549 return;
550 }
551 continue;
552 }
ddca1582
MD
553 if (kcpu->ktr_buf[tstate[i].cur].ktr_timestamp > highest_ts) {
554 highest_ts = kcpu->ktr_buf[tstate[i].cur].ktr_timestamp;
8e273a1d
EN
555 highest_cpu = i;
556 }
557 }
438c526f
MD
558 if (highest_cpu < 0) {
559 db_printf("no KTR data available\n");
560 break;
561 }
8e273a1d 562 i = highest_cpu;
ddca1582
MD
563 kcpu = &ktr_cpu[i].core;
564 kp = &kcpu->ktr_buf[tstate[i].cur];
8e273a1d
EN
565 if (tstate[i].first == -1)
566 tstate[i].first = tstate[i].cur;
567 if (--tstate[i].cur < 0)
568 tstate[i].cur = KTR_ENTRIES - 1;
569 if (tstate[i].first == tstate[i].cur) {
d3776285 570 db_mach_vtrace(i, kp, tstate[i].cur + 1);
8e273a1d
EN
571 tstate[i].cur = -1;
572 continue;
573 }
ddca1582 574 if (kcpu->ktr_buf[tstate[i].cur].ktr_info == NULL)
8e273a1d
EN
575 tstate[i].cur = -1;
576 if (db_more(&nl) == -1)
577 break;
d3776285 578 if (db_mach_vtrace(i, kp, tstate[i].cur + 1) == 0)
8e273a1d
EN
579 tstate[i].cur = -1;
580 }
81540c2d
EN
581}
582
583static int
d3776285 584db_mach_vtrace(int cpu, struct ktr_entry *kp, int idx)
81540c2d 585{
d3776285 586 if (kp->ktr_info == NULL)
8e273a1d 587 return(0);
81540c2d 588#ifdef SMP
d3776285 589 db_printf("cpu%d ", cpu);
81540c2d 590#endif
8e273a1d 591 db_printf("%d: ", idx);
81540c2d
EN
592 if (db_ktr_verbose) {
593 db_printf("%10.10lld %s.%d\t", (long long)kp->ktr_timestamp,
594 kp->ktr_file, kp->ktr_line);
595 }
d3776285 596 db_printf("%s\t", kp->ktr_info->kf_name);
af6ff89e 597 db_printf("from(%p,%p) ", kp->ktr_caller1, kp->ktr_caller2);
4afe74da 598#ifdef __i386__
00828b33
MD
599 if (kp->ktr_info->kf_format)
600 db_vprintf(kp->ktr_info->kf_format, (__va_list)kp->ktr_data);
4afe74da 601#endif
81540c2d
EN
602 db_printf("\n");
603
8e273a1d 604 return(1);
81540c2d
EN
605}
606
607#endif /* DDB */