diff options
Diffstat (limited to 'sys/kern/subr_kdb.c')
| -rw-r--r-- | sys/kern/subr_kdb.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/sys/kern/subr_kdb.c b/sys/kern/subr_kdb.c index 0ab79fb..8b66a58 100644 --- a/sys/kern/subr_kdb.c +++ b/sys/kern/subr_kdb.c @@ -97,6 +97,11 @@ SYSCTL_INT(_debug_kdb, OID_AUTO, stop_cpus, CTLTYPE_INT | CTLFLAG_RW, TUNABLE_INT("debug.kdb.stop_cpus", &kdb_stop_cpus); #endif +/* + * Flag to indicate to debuggers why the debugger was entered. + */ +const char * volatile kdb_why = KDB_WHY_UNSET; + static int kdb_sysctl_available(SYSCTL_HANDLER_ARGS) { @@ -163,7 +168,7 @@ kdb_sysctl_enter(SYSCTL_HANDLER_ARGS) return (error); if (kdb_active) return (EBUSY); - kdb_enter("sysctl debug.kdb.enter"); + kdb_enter(KDB_WHY_SYSCTL, "sysctl debug.kdb.enter"); return (0); } @@ -295,17 +300,20 @@ kdb_dbbe_select(const char *name) * Enter the currently selected debugger. If a message has been provided, * it is printed first. If the debugger does not support the enter method, * it is entered by using breakpoint(), which enters the debugger through - * kdb_trap(). + * kdb_trap(). The 'why' argument will contain a more mechanically usable + * string than 'msg', and is relied upon by DDB scripting to identify the + * reason for entering the debugger so that the right script can be run. */ - void -kdb_enter(const char *msg) +kdb_enter(const char *why, const char *msg) { if (kdb_dbbe != NULL && kdb_active == 0) { if (msg != NULL) printf("KDB: enter: %s\n", msg); + kdb_why = why; breakpoint(); + kdb_why = KDB_WHY_UNSET; } } |
