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 * 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 */ 64 /* 65 * $DragonFly: src/sys/kern/kern_ktr.c,v 1.23 2008/02/12 23:33:23 corecode Exp $ 66 */ 67 /* 68 * Kernel tracepoint facility. 69 */ 70 71 #include "opt_ddb.h" 72 #include "opt_ktr.h" 73 74 #include <sys/param.h> 75 #include <sys/cons.h> 76 #include <sys/kernel.h> 77 #include <sys/libkern.h> 78 #include <sys/proc.h> 79 #include <sys/sysctl.h> 80 #include <sys/ktr.h> 81 #include <sys/systm.h> 82 #include <sys/time.h> 83 #include <sys/malloc.h> 84 #include <sys/spinlock.h> 85 #include <sys/thread2.h> 86 #include <sys/spinlock2.h> 87 #include <sys/ctype.h> 88 89 #include <machine/cpu.h> 90 #include <machine/cpufunc.h> 91 #include <machine/specialreg.h> 92 #include <machine/md_var.h> 93 94 #include <ddb/ddb.h> 95 96 #ifndef KTR_ENTRIES 97 #define KTR_ENTRIES 2048 98 #endif 99 #define KTR_ENTRIES_MASK (KTR_ENTRIES - 1) 100 101 /* 102 * test logging support. When ktr_testlogcnt is non-zero each synchronization 103 * interrupt will issue six back-to-back ktr logging messages on cpu 0 104 * so the user can determine KTR logging overheads. 105 */ 106 #if !defined(KTR_TESTLOG) 107 #define KTR_TESTLOG KTR_ALL 108 #endif 109 KTR_INFO_MASTER(testlog); 110 #if KTR_TESTLOG 111 KTR_INFO(KTR_TESTLOG, testlog, test1, 0, "test1", sizeof(void *) * 4); 112 KTR_INFO(KTR_TESTLOG, testlog, test2, 1, "test2", sizeof(void *) * 4); 113 KTR_INFO(KTR_TESTLOG, testlog, test3, 2, "test3", sizeof(void *) * 4); 114 KTR_INFO(KTR_TESTLOG, testlog, test4, 3, "test4", 0); 115 KTR_INFO(KTR_TESTLOG, testlog, test5, 4, "test5", 0); 116 KTR_INFO(KTR_TESTLOG, testlog, test6, 5, "test6", 0); 117 #ifdef SMP 118 KTR_INFO(KTR_TESTLOG, testlog, pingpong, 6, "pingpong", 0); 119 KTR_INFO(KTR_TESTLOG, testlog, pipeline, 7, "pipeline", 0); 120 #endif 121 KTR_INFO(KTR_TESTLOG, testlog, crit_beg, 8, "crit_beg", 0); 122 KTR_INFO(KTR_TESTLOG, testlog, crit_end, 9, "crit_end", 0); 123 KTR_INFO(KTR_TESTLOG, testlog, spin_beg, 10, "spin_beg", 0); 124 KTR_INFO(KTR_TESTLOG, testlog, spin_end, 11, "spin_end", 0); 125 #define logtest(name) KTR_LOG(testlog_ ## name, 0, 0, 0, 0) 126 #define logtest_noargs(name) KTR_LOG(testlog_ ## name) 127 #endif 128 129 MALLOC_DEFINE(M_KTR, "ktr", "ktr buffers"); 130 131 SYSCTL_NODE(_debug, OID_AUTO, ktr, CTLFLAG_RW, 0, "ktr"); 132 133 int ktr_entries = KTR_ENTRIES; 134 SYSCTL_INT(_debug_ktr, OID_AUTO, entries, CTLFLAG_RD, &ktr_entries, 0, ""); 135 136 int ktr_version = KTR_VERSION; 137 SYSCTL_INT(_debug_ktr, OID_AUTO, version, CTLFLAG_RD, &ktr_version, 0, ""); 138 139 static int ktr_stacktrace = 1; 140 SYSCTL_INT(_debug_ktr, OID_AUTO, stacktrace, CTLFLAG_RD, &ktr_stacktrace, 0, ""); 141 142 static int ktr_resynchronize = 0; 143 SYSCTL_INT(_debug_ktr, OID_AUTO, resynchronize, CTLFLAG_RW, &ktr_resynchronize, 0, ""); 144 145 #if KTR_TESTLOG 146 static int ktr_testlogcnt = 0; 147 SYSCTL_INT(_debug_ktr, OID_AUTO, testlogcnt, CTLFLAG_RW, &ktr_testlogcnt, 0, ""); 148 static int ktr_testipicnt = 0; 149 static int ktr_testipicnt_remainder; 150 SYSCTL_INT(_debug_ktr, OID_AUTO, testipicnt, CTLFLAG_RW, &ktr_testipicnt, 0, ""); 151 static int ktr_testcritcnt = 0; 152 SYSCTL_INT(_debug_ktr, OID_AUTO, testcritcnt, CTLFLAG_RW, &ktr_testcritcnt, 0, ""); 153 static int ktr_testspincnt = 0; 154 SYSCTL_INT(_debug_ktr, OID_AUTO, testspincnt, CTLFLAG_RW, &ktr_testspincnt, 0, ""); 155 #endif 156 157 /* 158 * Give cpu0 a static buffer so the tracepoint facility can be used during 159 * early boot (note however that we still use a critical section, XXX). 160 */ 161 static struct ktr_entry ktr_buf0[KTR_ENTRIES]; 162 struct ktr_entry *ktr_buf[MAXCPU] = { &ktr_buf0[0] }; 163 int ktr_idx[MAXCPU]; 164 #ifdef SMP 165 static int ktr_sync_state = 0; 166 static int ktr_sync_count; 167 static int64_t ktr_sync_tsc; 168 #endif 169 struct callout ktr_resync_callout; 170 171 #ifdef KTR_VERBOSE 172 int ktr_verbose = KTR_VERBOSE; 173 TUNABLE_INT("debug.ktr.verbose", &ktr_verbose); 174 SYSCTL_INT(_debug_ktr, OID_AUTO, verbose, CTLFLAG_RW, &ktr_verbose, 0, ""); 175 #endif 176 177 static void ktr_resync_callback(void *dummy __unused); 178 179 extern int64_t tsc_offsets[]; 180 181 static void 182 ktr_sysinit(void *dummy) 183 { 184 int i; 185 186 for(i = 1; i < ncpus; ++i) { 187 ktr_buf[i] = kmalloc(KTR_ENTRIES * sizeof(struct ktr_entry), 188 M_KTR, M_WAITOK | M_ZERO); 189 } 190 callout_init(&ktr_resync_callout); 191 callout_reset(&ktr_resync_callout, hz / 10, ktr_resync_callback, NULL); 192 } 193 SYSINIT(ktr_sysinit, SI_BOOT2_KLD, SI_ORDER_ANY, ktr_sysinit, NULL); 194 195 /* 196 * Try to resynchronize the TSC's for all cpus. This is really, really nasty. 197 * We have to send an IPIQ message to all remote cpus, wait until they 198 * get into their IPIQ processing code loop, then do an even stricter hard 199 * loop to get the cpus as close to synchronized as we can to get the most 200 * accurate reading. 201 * 202 * This callback occurs on cpu0. 203 */ 204 #if KTR_TESTLOG 205 static void ktr_pingpong_remote(void *dummy); 206 static void ktr_pipeline_remote(void *dummy); 207 #endif 208 209 #if defined(SMP) && defined(_RDTSC_SUPPORTED_) 210 211 static void ktr_resync_remote(void *dummy); 212 extern cpumask_t smp_active_mask; 213 214 /* 215 * We use a callout callback instead of a systimer because we cannot afford 216 * to preempt anyone to do this, or we might deadlock a spin-lock or 217 * serializer between two cpus. 218 */ 219 static 220 void 221 ktr_resync_callback(void *dummy __unused) 222 { 223 int count; 224 225 KKASSERT(mycpu->gd_cpuid == 0); 226 227 #if KTR_TESTLOG 228 /* 229 * Test logging 230 */ 231 if (ktr_testlogcnt) { 232 --ktr_testlogcnt; 233 cpu_disable_intr(); 234 logtest(test1); 235 logtest(test2); 236 logtest(test3); 237 logtest_noargs(test4); 238 logtest_noargs(test5); 239 logtest_noargs(test6); 240 cpu_enable_intr(); 241 } 242 243 /* 244 * Test IPI messaging 245 */ 246 if (ktr_testipicnt && ktr_testipicnt_remainder == 0 && ncpus > 1) { 247 ktr_testipicnt_remainder = ktr_testipicnt; 248 ktr_testipicnt = 0; 249 lwkt_send_ipiq_bycpu(1, ktr_pingpong_remote, NULL); 250 } 251 252 /* 253 * Test critical sections 254 */ 255 if (ktr_testcritcnt) { 256 crit_enter(); 257 crit_exit(); 258 logtest_noargs(crit_beg); 259 for (count = ktr_testcritcnt; count; --count) { 260 crit_enter(); 261 crit_exit(); 262 } 263 logtest_noargs(crit_end); 264 ktr_testcritcnt = 0; 265 } 266 267 /* 268 * Test spinlock sections 269 */ 270 if (ktr_testspincnt) { 271 struct spinlock spin; 272 273 spin_init(&spin); 274 spin_lock_wr(&spin); 275 spin_unlock_wr(&spin); 276 logtest_noargs(spin_beg); 277 for (count = ktr_testspincnt; count; --count) { 278 spin_lock_wr(&spin); 279 spin_unlock_wr(&spin); 280 } 281 logtest_noargs(spin_end); 282 logtest_noargs(spin_beg); 283 for (count = ktr_testspincnt; count; --count) { 284 spin_lock_rd(&spin); 285 spin_unlock_rd(&spin); 286 } 287 logtest_noargs(spin_end); 288 ktr_testspincnt = 0; 289 } 290 #endif 291 292 /* 293 * Resynchronize the TSC 294 */ 295 if (ktr_resynchronize == 0) 296 goto done; 297 if ((cpu_feature & CPUID_TSC) == 0) 298 return; 299 300 /* 301 * Send the synchronizing IPI and wait for all cpus to get into 302 * their spin loop. We must process incoming IPIs while waiting 303 * to avoid a deadlock. 304 */ 305 crit_enter(); 306 ktr_sync_count = 0; 307 ktr_sync_state = 1; 308 ktr_sync_tsc = rdtsc(); 309 count = lwkt_send_ipiq_mask(mycpu->gd_other_cpus & smp_active_mask, 310 (ipifunc1_t)ktr_resync_remote, NULL); 311 while (ktr_sync_count != count) 312 lwkt_process_ipiq(); 313 314 /* 315 * Continuously update the TSC for cpu 0 while waiting for all other 316 * cpus to finish stage 2. 317 */ 318 cpu_disable_intr(); 319 ktr_sync_tsc = rdtsc(); 320 cpu_sfence(); 321 ktr_sync_state = 2; 322 cpu_sfence(); 323 while (ktr_sync_count != 0) { 324 ktr_sync_tsc = rdtsc(); 325 cpu_lfence(); 326 cpu_nop(); 327 } 328 cpu_enable_intr(); 329 crit_exit(); 330 ktr_sync_state = 0; 331 done: 332 callout_reset(&ktr_resync_callout, hz / 10, ktr_resync_callback, NULL); 333 } 334 335 /* 336 * The remote-end of the KTR synchronization protocol runs on all cpus except 337 * cpu 0. Since this is an IPI function, it is entered with the current 338 * thread in a critical section. 339 */ 340 static void 341 ktr_resync_remote(void *dummy __unused) 342 { 343 volatile int64_t tsc1 = ktr_sync_tsc; 344 volatile int64_t tsc2; 345 346 /* 347 * Inform the master that we have entered our hard loop. 348 */ 349 KKASSERT(ktr_sync_state == 1); 350 atomic_add_int(&ktr_sync_count, 1); 351 while (ktr_sync_state == 1) { 352 lwkt_process_ipiq(); 353 } 354 355 /* 356 * Now the master is in a hard loop, synchronize the TSC and 357 * we are done. 358 */ 359 cpu_disable_intr(); 360 KKASSERT(ktr_sync_state == 2); 361 tsc2 = ktr_sync_tsc; 362 if (tsc2 > tsc1) 363 tsc_offsets[mycpu->gd_cpuid] = rdtsc() - tsc2; 364 atomic_subtract_int(&ktr_sync_count, 1); 365 cpu_enable_intr(); 366 } 367 368 #if KTR_TESTLOG 369 370 static 371 void 372 ktr_pingpong_remote(void *dummy __unused) 373 { 374 int other_cpu; 375 376 logtest_noargs(pingpong); 377 other_cpu = 1 - mycpu->gd_cpuid; 378 if (ktr_testipicnt_remainder) { 379 --ktr_testipicnt_remainder; 380 lwkt_send_ipiq_bycpu(other_cpu, ktr_pingpong_remote, NULL); 381 } else { 382 lwkt_send_ipiq_bycpu(other_cpu, ktr_pipeline_remote, NULL); 383 lwkt_send_ipiq_bycpu(other_cpu, ktr_pipeline_remote, NULL); 384 lwkt_send_ipiq_bycpu(other_cpu, ktr_pipeline_remote, NULL); 385 lwkt_send_ipiq_bycpu(other_cpu, ktr_pipeline_remote, NULL); 386 lwkt_send_ipiq_bycpu(other_cpu, ktr_pipeline_remote, NULL); 387 } 388 } 389 390 static 391 void 392 ktr_pipeline_remote(void *dummy __unused) 393 { 394 logtest_noargs(pipeline); 395 } 396 397 #endif 398 399 #else /* !SMP */ 400 401 /* 402 * The resync callback for UP doesn't do anything other then run the test 403 * log messages. If test logging is not enabled, don't bother resetting 404 * the callout. 405 */ 406 static 407 void 408 ktr_resync_callback(void *dummy __unused) 409 { 410 #if KTR_TESTLOG 411 /* 412 * Test logging 413 */ 414 if (ktr_testlogcnt) { 415 --ktr_testlogcnt; 416 cpu_disable_intr(); 417 logtest(test1); 418 logtest(test2); 419 logtest(test3); 420 logtest_noargs(test4); 421 logtest_noargs(test5); 422 logtest_noargs(test6); 423 cpu_enable_intr(); 424 } 425 callout_reset(&ktr_resync_callout, hz / 10, ktr_resync_callback, NULL); 426 #endif 427 } 428 429 #endif 430 431 /* 432 * KTR_WRITE_ENTRY - Primary entry point for kernel trace logging 433 */ 434 static __inline 435 void 436 ktr_write_entry(struct ktr_info *info, const char *file, int line, 437 const void *ptr) 438 { 439 struct ktr_entry *entry; 440 int cpu; 441 442 cpu = mycpu->gd_cpuid; 443 if (!ktr_buf[cpu]) 444 return; 445 446 crit_enter(); 447 entry = ktr_buf[cpu] + (ktr_idx[cpu] & KTR_ENTRIES_MASK); 448 ++ktr_idx[cpu]; 449 #ifdef _RDTSC_SUPPORTED_ 450 if (cpu_feature & CPUID_TSC) { 451 #ifdef SMP 452 entry->ktr_timestamp = rdtsc() - tsc_offsets[cpu]; 453 #else 454 entry->ktr_timestamp = rdtsc(); 455 #endif 456 } else 457 #endif 458 { 459 entry->ktr_timestamp = get_approximate_time_t(); 460 } 461 entry->ktr_info = info; 462 entry->ktr_file = file; 463 entry->ktr_line = line; 464 crit_exit(); 465 if (info->kf_data_size > KTR_BUFSIZE) 466 bcopyi(ptr, entry->ktr_data, KTR_BUFSIZE); 467 else if (info->kf_data_size) 468 bcopyi(ptr, entry->ktr_data, info->kf_data_size); 469 if (ktr_stacktrace) 470 cpu_ktr_caller(entry); 471 #ifdef KTR_VERBOSE 472 if (ktr_verbose && info->kf_format) { 473 #ifdef SMP 474 kprintf("cpu%d ", cpu); 475 #endif 476 if (ktr_verbose > 1) { 477 kprintf("%s.%d\t", entry->ktr_file, entry->ktr_line); 478 } 479 kvprintf(info->kf_format, ptr); 480 kprintf("\n"); 481 } 482 #endif 483 } 484 485 void 486 ktr_log(struct ktr_info *info, const char *file, int line, ...) 487 { 488 __va_list va; 489 490 if (panicstr == NULL) { 491 __va_start(va, line); 492 ktr_write_entry(info, file, line, va); 493 __va_end(va); 494 } 495 } 496 497 void 498 ktr_log_ptr(struct ktr_info *info, const char *file, int line, const void *ptr) 499 { 500 if (panicstr == NULL) { 501 ktr_write_entry(info, file, line, ptr); 502 } 503 } 504 505 #ifdef DDB 506 507 #define NUM_LINES_PER_PAGE 19 508 509 struct tstate { 510 int cur; 511 int first; 512 }; 513 514 static int db_ktr_verbose; 515 static int db_mach_vtrace(int cpu, struct ktr_entry *kp, int idx); 516 517 DB_SHOW_COMMAND(ktr, db_ktr_all) 518 { 519 int a_flag = 0; 520 int c; 521 int nl = 0; 522 int i; 523 struct tstate tstate[MAXCPU]; 524 int printcpu = -1; 525 526 for(i = 0; i < ncpus; i++) { 527 tstate[i].first = -1; 528 tstate[i].cur = ktr_idx[i] & KTR_ENTRIES_MASK; 529 } 530 db_ktr_verbose = 0; 531 while ((c = *(modif++)) != '\0') { 532 if (c == 'v') { 533 db_ktr_verbose = 1; 534 } 535 else if (c == 'a') { 536 a_flag = 1; 537 } 538 else if (c == 'c') { 539 printcpu = 0; 540 while ((c = *(modif++)) != '\0') { 541 if (isdigit(c)) { 542 printcpu *= 10; 543 printcpu += c - '0'; 544 } 545 else { 546 modif++; 547 break; 548 } 549 } 550 modif--; 551 } 552 } 553 if (printcpu > ncpus - 1) { 554 db_printf("Invalid cpu number\n"); 555 return; 556 } 557 /* 558 * Lopp throug all the buffers and print the content of them, sorted 559 * by the timestamp. 560 */ 561 while (1) { 562 int counter; 563 u_int64_t highest_ts; 564 int highest_cpu; 565 struct ktr_entry *kp; 566 567 if (a_flag == 1 && cncheckc() != -1) 568 return; 569 highest_ts = 0; 570 highest_cpu = -1; 571 /* 572 * Find the lowest timestamp 573 */ 574 for (i = 0, counter = 0; i < ncpus; i++) { 575 if (ktr_buf[i] == NULL) 576 continue; 577 if (printcpu != -1 && printcpu != i) 578 continue; 579 if (tstate[i].cur == -1) { 580 counter++; 581 if (counter == ncpus) { 582 db_printf("--- End of trace buffer ---\n"); 583 return; 584 } 585 continue; 586 } 587 if (ktr_buf[i][tstate[i].cur].ktr_timestamp > highest_ts) { 588 highest_ts = ktr_buf[i][tstate[i].cur].ktr_timestamp; 589 highest_cpu = i; 590 } 591 } 592 i = highest_cpu; 593 KKASSERT(i != -1); 594 kp = &ktr_buf[i][tstate[i].cur]; 595 if (tstate[i].first == -1) 596 tstate[i].first = tstate[i].cur; 597 if (--tstate[i].cur < 0) 598 tstate[i].cur = KTR_ENTRIES - 1; 599 if (tstate[i].first == tstate[i].cur) { 600 db_mach_vtrace(i, kp, tstate[i].cur + 1); 601 tstate[i].cur = -1; 602 continue; 603 } 604 if (ktr_buf[i][tstate[i].cur].ktr_info == NULL) 605 tstate[i].cur = -1; 606 if (db_more(&nl) == -1) 607 break; 608 if (db_mach_vtrace(i, kp, tstate[i].cur + 1) == 0) 609 tstate[i].cur = -1; 610 } 611 } 612 613 static int 614 db_mach_vtrace(int cpu, struct ktr_entry *kp, int idx) 615 { 616 if (kp->ktr_info == NULL) 617 return(0); 618 #ifdef SMP 619 db_printf("cpu%d ", cpu); 620 #endif 621 db_printf("%d: ", idx); 622 if (db_ktr_verbose) { 623 db_printf("%10.10lld %s.%d\t", (long long)kp->ktr_timestamp, 624 kp->ktr_file, kp->ktr_line); 625 } 626 db_printf("%s\t", kp->ktr_info->kf_name); 627 db_printf("from(%p,%p) ", kp->ktr_caller1, kp->ktr_caller2); 628 if (kp->ktr_info->kf_format) { 629 int32_t *args = kp->ktr_data; 630 db_printf(kp->ktr_info->kf_format, 631 args[0], args[1], args[2], args[3], 632 args[4], args[5], args[6], args[7], 633 args[8], args[9], args[10], args[11]); 634 635 } 636 db_printf("\n"); 637 638 return(1); 639 } 640 641 #endif /* DDB */ 642