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author | mdf <mdf@FreeBSD.org> | 2011-02-18 22:25:11 +0000 |
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committer | mdf <mdf@FreeBSD.org> | 2011-02-18 22:25:11 +0000 |
commit | baf9dec697b13c0c3c2739e4d76b03367f062228 (patch) | |
tree | 46e277fb34fa25a6bc0562a2934616b700f3f6f8 /sys/ddb | |
parent | 699ef3129bdda98a0a0164e4d221a0273dfc24d8 (diff) | |
download | FreeBSD-src-baf9dec697b13c0c3c2739e4d76b03367f062228.zip FreeBSD-src-baf9dec697b13c0c3c2739e4d76b03367f062228.tar.gz |
Modify kdb_trap() so that it re-calls the dbbe_trap function as long as
the debugger back-end has changed. This means that switching from ddb
to gdb no longer requires a "step" which can be dangerous on an
already-crashed kernel.
Also add a capability to get from the gdb back-end back to ddb, by
typing ^C in the console window.
While here, simplify kdb_sysctl_available() by using
sbuf_new_for_sysctl(), and use strlcpy() instead of strncpy() since the
strlcpy semantic is desired.
MFC after: 1 month
Diffstat (limited to 'sys/ddb')
-rw-r--r-- | sys/ddb/db_command.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/sys/ddb/db_command.c b/sys/ddb/db_command.c index 7fab5c2..ba9c094 100644 --- a/sys/ddb/db_command.c +++ b/sys/ddb/db_command.c @@ -723,10 +723,16 @@ static void db_gdb(db_expr_t dummy1, boolean_t dummy2, db_expr_t dummy3, char *dummy4) { - if (kdb_dbbe_select("gdb") != 0) + if (kdb_dbbe_select("gdb") != 0) { db_printf("The remote GDB backend could not be selected.\n"); - else - db_printf("Step to enter the remote GDB backend.\n"); + return; + } + /* + * Mark that we are done in the debugger. kdb_trap() + * should re-enter with the new backend. + */ + db_cmd_loop_done = 1; + db_printf("(ctrl-c will return control to ddb)\n"); } static void |