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.
This commit is contained in:
Bjoern A. Zeeb 2020-10-17 22:47:08 +00:00
parent 4c4aa84848
commit f7a0bb0dec
Notes: svn2git 2020-12-20 02:59:44 +00:00
svn path=/head/; revision=366798

View File

@ -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 */