Date: Sat, 17 Oct 2020 22:47:09 +0000 (UTC) From: "Bjoern A. Zeeb" <bz@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r366798 - head/sys/kern Message-ID: <202010172247.09HMl9ZK082729@repo.freebsd.org>
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Author: bz Date: Sat Oct 17 22:47:08 2020 New Revision: 366798 URL: https://svnweb.freebsd.org/changeset/base/366798 Log: ddb: add show sysinit command Add a show sysinit command to ddb (similar to show vnet_sysinit) which proved to be helpful to debug some ordering issues on early-mid kernel start panics. Modified: head/sys/kern/init_main.c Modified: head/sys/kern/init_main.c ============================================================================== --- head/sys/kern/init_main.c Sat Oct 17 21:30:46 2020 (r366797) +++ head/sys/kern/init_main.c Sat Oct 17 22:47:08 2020 (r366798) @@ -47,6 +47,7 @@ __FBSDID("$FreeBSD$"); #include "opt_ddb.h" +#include "opt_kdb.h" #include "opt_init_path.h" #include "opt_verbose_sysinit.h" @@ -838,3 +839,51 @@ kick_init(const void *udata __unused) sched_add(td, SRQ_BORING); } SYSINIT(kickinit, SI_SUB_KTHREAD_INIT, SI_ORDER_MIDDLE, kick_init, NULL); + +/* + * DDB(4). + */ +#ifdef DDB +static void +db_show_print_syinit(struct sysinit *sip, bool ddb) +{ + const char *sname, *funcname; + c_db_sym_t sym; + db_expr_t offset; + +#define xprint(...) \ + if (ddb) \ + db_printf(__VA_ARGS__); \ + else \ + printf(__VA_ARGS__) + + if (sip == NULL) { + xprint("%s: no sysinit * given\n", __func__); + return; + } + + sym = db_search_symbol((vm_offset_t)sip, DB_STGY_ANY, &offset); + db_symbol_values(sym, &sname, NULL); + sym = db_search_symbol((vm_offset_t)sip->func, DB_STGY_PROC, &offset); + db_symbol_values(sym, &funcname, NULL); + xprint("%s(%p)\n", (sname != NULL) ? sname : "", sip); + xprint(" %#08x %#08x\n", sip->subsystem, sip->order); + xprint(" %p(%s)(%p)\n", + sip->func, (funcname != NULL) ? funcname : "", sip->udata); +#undef xprint +} + +DB_SHOW_COMMAND(sysinit, db_show_sysinit) +{ + struct sysinit **sipp; + + db_printf("SYSINIT vs Name(Ptr)\n"); + db_printf(" Subsystem Order\n"); + db_printf(" Function(Name)(Arg)\n"); + for (sipp = sysinit; sipp < sysinit_end; sipp++) { + db_show_print_syinit(*sipp, true); + if (db_pager_quit) + break; + } +} +#endif /* DDB */
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