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9210 remove KMDB branch debugging support
9211 ::crregs could do with cr2/cr3 support
9209 ::ttrace should be able to filter by thread
Reviewed by: Patrick Mooney <patrick.mooney@joyent.com>


   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
  23  * Copyright (c) 2013 by Delphix. All rights reserved.


  24  */
  25 
  26 #include <kmdb/kmdb_kvm.h>
  27 #include <kmdb/kvm.h>
  28 #include <kmdb/kmdb_kdi.h>
  29 #include <kmdb/kmdb_promif.h>
  30 #include <kmdb/kmdb_module.h>
  31 #include <kmdb/kmdb_asmutil.h>
  32 #include <mdb/mdb_types.h>
  33 #include <mdb/mdb_conf.h>
  34 #include <mdb/mdb_err.h>
  35 #include <mdb/mdb_modapi.h>
  36 #include <mdb/mdb_target_impl.h>
  37 #include <mdb/mdb_debug.h>
  38 #include <mdb/mdb_string.h>
  39 #include <mdb/mdb_ctf.h>
  40 #include <mdb/mdb_kreg_impl.h>
  41 #include <mdb/mdb_ks.h>
  42 #include <mdb/mdb.h>
  43 


 532                 if (msg != NULL) {
 533                         if (first) {
 534                                 mdb_printf(msg, NULL);
 535                                 first = 0;
 536                         }
 537 
 538                         mdb_printf(" %s", kmc->kmc_modname);
 539                 }
 540         }
 541 
 542         if (!first && msg != NULL)
 543                 mdb_printf("\n");
 544 
 545         return (n);
 546 }
 547 
 548 /*ARGSUSED*/
 549 static int
 550 kmt_status_dcmd(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
 551 {
 552         kmt_data_t *kmt = mdb.m_target->t_data;
 553         struct utsname uts;
 554         char uuid[37];
 555         kreg_t tt;
 556 
 557         if (mdb_tgt_readsym(mdb.m_target, MDB_TGT_AS_VIRT, &uts, sizeof (uts),
 558             "unix", "utsname") != sizeof (uts)) {
 559                 warn("failed to read 'utsname' struct from kernel\n");
 560                 bzero(&uts, sizeof (uts));
 561                 (void) strcpy(uts.nodename, "unknown machine");
 562         }
 563 
 564         mdb_printf("debugging live kernel (%d-bit) on %s\n",
 565             (int)(sizeof (void *) * NBBY),
 566             (*uts.nodename == '\0' ? "(not set)" : uts.nodename));
 567         mdb_printf("operating system: %s %s (%s)\n",
 568             uts.release, uts.version, uts.machine);
 569 
 570         if (mdb_tgt_readsym(mdb.m_target, MDB_TGT_AS_VIRT, uuid, sizeof (uuid),
 571             "genunix", "dump_osimage_uuid") != sizeof (uuid)) {
 572                 warn("failed to read 'dump_osimage_uuid' string from kernel\n");
 573                 (void) strcpy(uuid, "(error)");
 574         } else if (*uuid == '\0') {
 575                 (void) strcpy(uuid, "(not set)");
 576         } else if (uuid[36] != '\0') {
 577                 (void) strcpy(uuid, "(invalid)");
 578         }
 579         mdb_printf("image uuid: %s\n", uuid);
 580 
 581         if (kmt->kmt_cpu != NULL) {
 582                 mdb_printf("CPU-specific support: %s\n",
 583                     kmt_cpu_name(kmt->kmt_cpu));
 584         }
 585 
 586         mdb_printf("DTrace state: %s\n", (kmdb_kdi_dtrace_get_state() ==
 587             KDI_DTSTATE_DTRACE_ACTIVE ? "active (debugger breakpoints cannot "
 588             "be armed)" : "inactive"));
 589 
 590         (void) kmdb_dpi_get_register("tt", &tt);
 591         mdb_printf("stopped on: %s\n", kmt_trapname(tt));
 592 
 593         (void) kmt_dmod_status("pending dmod loads:", KMDB_MC_STATE_LOADING);
 594         (void) kmt_dmod_status("pending dmod unloads:",
 595             KMDB_MC_STATE_UNLOADING);
 596 
 597         return (DCMD_OK);
 598 }
 599 
 600 /*ARGSUSED*/
 601 static int
 602 kmt_switch(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
 603 {
 604         if (!(flags & DCMD_ADDRSPEC) || argc != 0)
 605                 return (DCMD_USAGE);


2375 }
2376 
2377 static void
2378 kmt_destroy(mdb_tgt_t *t)
2379 {
2380         kmt_data_t *kmt = t->t_data;
2381         kmt_module_t *km, *pkm;
2382 
2383         mdb_nv_destroy(&kmt->kmt_modules);
2384         for (km = mdb_list_prev(&kmt->kmt_modlist); km != NULL; km = pkm) {
2385                 pkm = mdb_list_prev(km);
2386                 mdb_free(km, sizeof (kmt_module_t));
2387         }
2388 
2389         if (!kmt_defbp_lock)
2390                 kmt_defbp_destroy_all();
2391 
2392         if (kmt->kmt_trapmap != NULL)
2393                 mdb_free(kmt->kmt_trapmap, BT_SIZEOFMAP(kmt->kmt_trapmax));
2394 
2395         if (kmt->kmt_cpu != NULL)
2396                 kmt_cpu_destroy(kmt->kmt_cpu);
2397 
2398         if (kmt != NULL)
2399                 mdb_free(kmt, sizeof (kmt_data_t));
2400 }
2401 
2402 static const mdb_tgt_ops_t kmt_ops = {
2403         kmt_setflags,                           /* t_setflags */
2404         (int (*)()) mdb_tgt_notsup,             /* t_setcontext */
2405         kmt_activate,                           /* t_activate */
2406         (void (*)()) mdb_tgt_nop,               /* t_deactivate */
2407         kmt_periodic,                           /* t_periodic */
2408         kmt_destroy,                            /* t_destroy */
2409         kmt_name,                               /* t_name */
2410         (const char *(*)()) mdb_conf_isa,       /* t_isa */
2411         kmt_platform,                           /* t_platform */
2412         kmt_uname,                              /* t_uname */
2413         kmt_dmodel,                             /* t_dmodel */
2414         (ssize_t (*)()) mdb_tgt_notsup,         /* t_aread */
2415         (ssize_t (*)()) mdb_tgt_notsup,         /* t_awrite */
2416         kmt_read,                               /* t_vread */
2417         kmt_write,                              /* t_vwrite */
2418         kmt_pread,                              /* t_pread */
2419         kmt_pwrite,                             /* t_pwrite */
2420         kmt_read,                               /* t_fread */
2421         kmt_write,                              /* t_fwrite */
2422         kmt_ioread,                             /* t_ioread */
2423         kmt_iowrite,                            /* t_iowrite */
2424         kmt_vtop,                               /* t_vtop */
2425         kmt_lookup_by_name,                     /* t_lookup_by_name */
2426         kmt_lookup_by_addr,                     /* t_lookup_by_addr */
2427         kmt_symbol_iter,                        /* t_symbol_iter */
2428         kmt_mapping_iter,                       /* t_mapping_iter */
2429         kmt_object_iter,                        /* t_object_iter */
2430         kmt_addr_to_map,                        /* t_addr_to_map */
2431         kmt_name_to_map,                        /* t_name_to_map */
2432         kmt_addr_to_ctf,                        /* t_addr_to_ctf */
2433         kmt_name_to_ctf,                        /* t_name_to_ctf */
2434         kmt_status,                             /* t_status */
2435         (int (*)()) mdb_tgt_notsup,             /* t_run */
2436         kmt_step,                               /* t_step */
2437         kmt_step_out,                           /* t_step_out */
2438         kmt_step_branch,                        /* t_step_branch */
2439         kmt_next,                               /* t_next */
2440         kmt_continue,                           /* t_cont */
2441         (int (*)()) mdb_tgt_notsup,             /* t_signal */
2442         kmt_add_vbrkpt,                         /* t_add_vbrkpt */
2443         kmt_add_sbrkpt,                         /* t_add_sbrkpt */
2444         kmt_add_pwapt,                          /* t_add_pwapt */
2445         kmt_add_vwapt,                          /* t_add_vwapt */
2446         kmt_add_iowapt,                         /* t_add_iowapt */
2447         (int (*)()) mdb_tgt_null,               /* t_add_sysenter */
2448         (int (*)()) mdb_tgt_null,               /* t_add_sysexit */
2449         (int (*)()) mdb_tgt_null,               /* t_add_signal */
2450         kmt_add_trap,                           /* t_add_fault */
2451         kmt_getareg,                            /* t_getareg */
2452         kmt_putareg,                            /* t_putareg */
2453         (int (*)()) mdb_tgt_nop,                /* XXX t_stack_iter */
2454         (int (*)()) mdb_tgt_notsup              /* t_auxv */
2455 };
2456 
2457 /*
2458  * Called immediately upon resumption of the system after a step or continue.


2487         kmt->kmt_symavail = TRUE;
2488 
2489         mdb_dprintf(MDB_DBG_KMOD, "synchronization complete\n");
2490 
2491         kmt_defbp_prune();
2492 
2493         if (kmt_defbp_num > 0 && kmt_defbp_bpspec == 0 &&
2494             kmdb_kdi_dtrace_get_state() != KDI_DTSTATE_DTRACE_ACTIVE) {
2495                 /*
2496                  * Deferred breakpoints were created while DTrace was active,
2497                  * and consequently the deferred breakpoint enabling mechanism
2498                  * wasn't activated.  Activate it now, and then try to activate
2499                  * the deferred breakpoints.  We do this so that we can catch
2500                  * the ones which may apply to modules that have been loaded
2501                  * while they were waiting for DTrace to deactivate.
2502                  */
2503                 (void) kmt_defbp_activate(t);
2504                 (void) mdb_tgt_sespec_activate_all(t);
2505         }
2506 
2507         if (kmt->kmt_cpu_retry && ((kmt->kmt_cpu = kmt_cpu_create(t)) !=
2508             NULL || errno != EAGAIN))
2509                 kmt->kmt_cpu_retry = FALSE;
2510 
2511         (void) mdb_tgt_status(t, &t->t_status);
2512 }
2513 
2514 /*
2515  * This routine executes while the kernel is running.
2516  */
2517 /*ARGSUSED*/
2518 int
2519 kmdb_kvm_create(mdb_tgt_t *t, int argc, const char *argv[])
2520 {
2521         kmt_data_t *kmt;
2522 
2523         if (argc != 0)
2524                 return (set_errno(EINVAL));
2525 
2526         kmt = mdb_zalloc(sizeof (kmt_data_t), UM_SLEEP);
2527         t->t_data = kmt;
2528         t->t_ops = &kmt_ops;
2529         t->t_flags |= MDB_TGT_F_RDWR;        /* kmdb is always r/w */
2530 
2531         (void) mdb_nv_insert(&mdb.m_nv, "cpuid", &kmt_cpuid_disc, 0,
2532             MDB_NV_PERSIST | MDB_NV_RDONLY);
2533 
2534         (void) mdb_nv_create(&kmt->kmt_modules, UM_SLEEP);
2535 
2536         kmt_init_isadep(t);
2537 
2538         kmt->kmt_symavail = FALSE;
2539         kmt->kmt_cpu_retry = TRUE;
2540 
2541         bzero(&kmt_defbp_list, sizeof (mdb_list_t));
2542 
2543         return (0);
2544 
2545 create_err:
2546         kmt_destroy(t);
2547 
2548         return (-1);
2549 }
2550 
2551 /*
2552  * This routine is called once, when kmdb first has control of the world.
2553  */
2554 void
2555 kmdb_kvm_startup(void)
2556 {
2557         kmt_data_t *kmt = mdb.m_target->t_data;
2558 
2559         mdb_dprintf(MDB_DBG_KMOD, "kmdb_kvm startup\n");




   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
  23  * Copyright (c) 2013 by Delphix. All rights reserved.
  24  *
  25  * Copyright 2018 Joyent, Inc.
  26  */
  27 
  28 #include <kmdb/kmdb_kvm.h>
  29 #include <kmdb/kvm.h>
  30 #include <kmdb/kmdb_kdi.h>
  31 #include <kmdb/kmdb_promif.h>
  32 #include <kmdb/kmdb_module.h>
  33 #include <kmdb/kmdb_asmutil.h>
  34 #include <mdb/mdb_types.h>
  35 #include <mdb/mdb_conf.h>
  36 #include <mdb/mdb_err.h>
  37 #include <mdb/mdb_modapi.h>
  38 #include <mdb/mdb_target_impl.h>
  39 #include <mdb/mdb_debug.h>
  40 #include <mdb/mdb_string.h>
  41 #include <mdb/mdb_ctf.h>
  42 #include <mdb/mdb_kreg_impl.h>
  43 #include <mdb/mdb_ks.h>
  44 #include <mdb/mdb.h>
  45 


 534                 if (msg != NULL) {
 535                         if (first) {
 536                                 mdb_printf(msg, NULL);
 537                                 first = 0;
 538                         }
 539 
 540                         mdb_printf(" %s", kmc->kmc_modname);
 541                 }
 542         }
 543 
 544         if (!first && msg != NULL)
 545                 mdb_printf("\n");
 546 
 547         return (n);
 548 }
 549 
 550 /*ARGSUSED*/
 551 static int
 552 kmt_status_dcmd(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
 553 {

 554         struct utsname uts;
 555         char uuid[37];
 556         kreg_t tt;
 557 
 558         if (mdb_tgt_readsym(mdb.m_target, MDB_TGT_AS_VIRT, &uts, sizeof (uts),
 559             "unix", "utsname") != sizeof (uts)) {
 560                 warn("failed to read 'utsname' struct from kernel\n");
 561                 bzero(&uts, sizeof (uts));
 562                 (void) strcpy(uts.nodename, "unknown machine");
 563         }
 564 
 565         mdb_printf("debugging live kernel (%d-bit) on %s\n",
 566             (int)(sizeof (void *) * NBBY),
 567             (*uts.nodename == '\0' ? "(not set)" : uts.nodename));
 568         mdb_printf("operating system: %s %s (%s)\n",
 569             uts.release, uts.version, uts.machine);
 570 
 571         if (mdb_tgt_readsym(mdb.m_target, MDB_TGT_AS_VIRT, uuid, sizeof (uuid),
 572             "genunix", "dump_osimage_uuid") != sizeof (uuid)) {
 573                 warn("failed to read 'dump_osimage_uuid' string from kernel\n");
 574                 (void) strcpy(uuid, "(error)");
 575         } else if (*uuid == '\0') {
 576                 (void) strcpy(uuid, "(not set)");
 577         } else if (uuid[36] != '\0') {
 578                 (void) strcpy(uuid, "(invalid)");
 579         }
 580         mdb_printf("image uuid: %s\n", uuid);
 581 





 582         mdb_printf("DTrace state: %s\n", (kmdb_kdi_dtrace_get_state() ==
 583             KDI_DTSTATE_DTRACE_ACTIVE ? "active (debugger breakpoints cannot "
 584             "be armed)" : "inactive"));
 585 
 586         (void) kmdb_dpi_get_register("tt", &tt);
 587         mdb_printf("stopped on: %s\n", kmt_trapname(tt));
 588 
 589         (void) kmt_dmod_status("pending dmod loads:", KMDB_MC_STATE_LOADING);
 590         (void) kmt_dmod_status("pending dmod unloads:",
 591             KMDB_MC_STATE_UNLOADING);
 592 
 593         return (DCMD_OK);
 594 }
 595 
 596 /*ARGSUSED*/
 597 static int
 598 kmt_switch(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
 599 {
 600         if (!(flags & DCMD_ADDRSPEC) || argc != 0)
 601                 return (DCMD_USAGE);


2371 }
2372 
2373 static void
2374 kmt_destroy(mdb_tgt_t *t)
2375 {
2376         kmt_data_t *kmt = t->t_data;
2377         kmt_module_t *km, *pkm;
2378 
2379         mdb_nv_destroy(&kmt->kmt_modules);
2380         for (km = mdb_list_prev(&kmt->kmt_modlist); km != NULL; km = pkm) {
2381                 pkm = mdb_list_prev(km);
2382                 mdb_free(km, sizeof (kmt_module_t));
2383         }
2384 
2385         if (!kmt_defbp_lock)
2386                 kmt_defbp_destroy_all();
2387 
2388         if (kmt->kmt_trapmap != NULL)
2389                 mdb_free(kmt->kmt_trapmap, BT_SIZEOFMAP(kmt->kmt_trapmax));
2390 



2391         if (kmt != NULL)
2392                 mdb_free(kmt, sizeof (kmt_data_t));
2393 }
2394 
2395 static const mdb_tgt_ops_t kmt_ops = {
2396         kmt_setflags,                           /* t_setflags */
2397         (int (*)()) mdb_tgt_notsup,             /* t_setcontext */
2398         kmt_activate,                           /* t_activate */
2399         (void (*)()) mdb_tgt_nop,               /* t_deactivate */
2400         kmt_periodic,                           /* t_periodic */
2401         kmt_destroy,                            /* t_destroy */
2402         kmt_name,                               /* t_name */
2403         (const char *(*)()) mdb_conf_isa,       /* t_isa */
2404         kmt_platform,                           /* t_platform */
2405         kmt_uname,                              /* t_uname */
2406         kmt_dmodel,                             /* t_dmodel */
2407         (ssize_t (*)()) mdb_tgt_notsup,         /* t_aread */
2408         (ssize_t (*)()) mdb_tgt_notsup,         /* t_awrite */
2409         kmt_read,                               /* t_vread */
2410         kmt_write,                              /* t_vwrite */
2411         kmt_pread,                              /* t_pread */
2412         kmt_pwrite,                             /* t_pwrite */
2413         kmt_read,                               /* t_fread */
2414         kmt_write,                              /* t_fwrite */
2415         kmt_ioread,                             /* t_ioread */
2416         kmt_iowrite,                            /* t_iowrite */
2417         kmt_vtop,                               /* t_vtop */
2418         kmt_lookup_by_name,                     /* t_lookup_by_name */
2419         kmt_lookup_by_addr,                     /* t_lookup_by_addr */
2420         kmt_symbol_iter,                        /* t_symbol_iter */
2421         kmt_mapping_iter,                       /* t_mapping_iter */
2422         kmt_object_iter,                        /* t_object_iter */
2423         kmt_addr_to_map,                        /* t_addr_to_map */
2424         kmt_name_to_map,                        /* t_name_to_map */
2425         kmt_addr_to_ctf,                        /* t_addr_to_ctf */
2426         kmt_name_to_ctf,                        /* t_name_to_ctf */
2427         kmt_status,                             /* t_status */
2428         (int (*)()) mdb_tgt_notsup,             /* t_run */
2429         kmt_step,                               /* t_step */
2430         kmt_step_out,                           /* t_step_out */

2431         kmt_next,                               /* t_next */
2432         kmt_continue,                           /* t_cont */
2433         (int (*)()) mdb_tgt_notsup,             /* t_signal */
2434         kmt_add_vbrkpt,                         /* t_add_vbrkpt */
2435         kmt_add_sbrkpt,                         /* t_add_sbrkpt */
2436         kmt_add_pwapt,                          /* t_add_pwapt */
2437         kmt_add_vwapt,                          /* t_add_vwapt */
2438         kmt_add_iowapt,                         /* t_add_iowapt */
2439         (int (*)()) mdb_tgt_null,               /* t_add_sysenter */
2440         (int (*)()) mdb_tgt_null,               /* t_add_sysexit */
2441         (int (*)()) mdb_tgt_null,               /* t_add_signal */
2442         kmt_add_trap,                           /* t_add_fault */
2443         kmt_getareg,                            /* t_getareg */
2444         kmt_putareg,                            /* t_putareg */
2445         (int (*)()) mdb_tgt_nop,                /* XXX t_stack_iter */
2446         (int (*)()) mdb_tgt_notsup              /* t_auxv */
2447 };
2448 
2449 /*
2450  * Called immediately upon resumption of the system after a step or continue.


2479         kmt->kmt_symavail = TRUE;
2480 
2481         mdb_dprintf(MDB_DBG_KMOD, "synchronization complete\n");
2482 
2483         kmt_defbp_prune();
2484 
2485         if (kmt_defbp_num > 0 && kmt_defbp_bpspec == 0 &&
2486             kmdb_kdi_dtrace_get_state() != KDI_DTSTATE_DTRACE_ACTIVE) {
2487                 /*
2488                  * Deferred breakpoints were created while DTrace was active,
2489                  * and consequently the deferred breakpoint enabling mechanism
2490                  * wasn't activated.  Activate it now, and then try to activate
2491                  * the deferred breakpoints.  We do this so that we can catch
2492                  * the ones which may apply to modules that have been loaded
2493                  * while they were waiting for DTrace to deactivate.
2494                  */
2495                 (void) kmt_defbp_activate(t);
2496                 (void) mdb_tgt_sespec_activate_all(t);
2497         }
2498 




2499         (void) mdb_tgt_status(t, &t->t_status);
2500 }
2501 
2502 /*
2503  * This routine executes while the kernel is running.
2504  */
2505 /*ARGSUSED*/
2506 int
2507 kmdb_kvm_create(mdb_tgt_t *t, int argc, const char *argv[])
2508 {
2509         kmt_data_t *kmt;
2510 
2511         if (argc != 0)
2512                 return (set_errno(EINVAL));
2513 
2514         kmt = mdb_zalloc(sizeof (kmt_data_t), UM_SLEEP);
2515         t->t_data = kmt;
2516         t->t_ops = &kmt_ops;
2517         t->t_flags |= MDB_TGT_F_RDWR;        /* kmdb is always r/w */
2518 
2519         (void) mdb_nv_insert(&mdb.m_nv, "cpuid", &kmt_cpuid_disc, 0,
2520             MDB_NV_PERSIST | MDB_NV_RDONLY);
2521 
2522         (void) mdb_nv_create(&kmt->kmt_modules, UM_SLEEP);
2523 
2524         kmt_init_isadep(t);
2525 
2526         kmt->kmt_symavail = FALSE;

2527 
2528         bzero(&kmt_defbp_list, sizeof (mdb_list_t));
2529 
2530         return (0);
2531 
2532 create_err:
2533         kmt_destroy(t);
2534 
2535         return (-1);
2536 }
2537 
2538 /*
2539  * This routine is called once, when kmdb first has control of the world.
2540  */
2541 void
2542 kmdb_kvm_startup(void)
2543 {
2544         kmt_data_t *kmt = mdb.m_target->t_data;
2545 
2546         mdb_dprintf(MDB_DBG_KMOD, "kmdb_kvm startup\n");