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[src/trunk]: src/sys/ddb - add ddb.panicstackframes to avoid scrolling the in...
details: https://anonhg.NetBSD.org/src/rev/27b43a5d9752
branches: trunk
changeset: 828719:27b43a5d9752
user: christos <christos%NetBSD.org@localhost>
date: Thu Dec 28 17:51:19 2017 +0000
description:
- add ddb.panicstackframes to avoid scrolling the interesting parts of panic
stacktraces off.
- change valuep to void * to avoid casts
- sort and use c99 initializers in variables array
diffstat:
sys/ddb/db_panic.c | 4 +-
sys/ddb/db_variables.c | 84 +++++++++++++++++++++++++++++++++++++++++--------
sys/ddb/db_variables.h | 4 +-
sys/ddb/ddbvar.h | 3 +-
sys/ddb/files.ddb | 4 +-
5 files changed, 78 insertions(+), 21 deletions(-)
diffs (213 lines):
diff -r 93ac49638f90 -r 27b43a5d9752 sys/ddb/db_panic.c
--- a/sys/ddb/db_panic.c Thu Dec 28 15:12:15 2017 +0000
+++ b/sys/ddb/db_panic.c Thu Dec 28 17:51:19 2017 +0000
@@ -25,7 +25,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: db_panic.c,v 1.5 2017/10/27 12:25:15 joerg Exp $");
+__KERNEL_RCSID(0, "$NetBSD: db_panic.c,v 1.6 2017/12/28 17:51:19 christos Exp $");
#include <sys/types.h>
#include <sys/cpu.h>
@@ -52,7 +52,7 @@
cpu_index(curcpu()));
db_stack_trace_print(
(db_expr_t)(intptr_t)__builtin_frame_address(0),
- true, 65535, "", printf);
+ true, db_panicstackframes, "", printf);
printf("cpu%u: End traceback...\n",
cpu_index(curcpu()));
intrace = 0;
diff -r 93ac49638f90 -r 27b43a5d9752 sys/ddb/db_variables.c
--- a/sys/ddb/db_variables.c Thu Dec 28 15:12:15 2017 +0000
+++ b/sys/ddb/db_variables.c Thu Dec 28 17:51:19 2017 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: db_variables.c,v 1.44 2014/02/25 18:30:09 pooka Exp $ */
+/* $NetBSD: db_variables.c,v 1.45 2017/12/28 17:51:19 christos Exp $ */
/*
* Mach Operating System
@@ -27,7 +27,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: db_variables.c,v 1.44 2014/02/25 18:30:09 pooka Exp $");
+__KERNEL_RCSID(0, "$NetBSD: db_variables.c,v 1.45 2017/12/28 17:51:19 christos Exp $");
#ifdef _KERNEL_OPT
#include "opt_ddbparam.h"
@@ -66,6 +66,11 @@
#endif
int db_tee_msgbuf = DDB_TEE_MSGBUF;
+#ifndef DDB_PANICSTACKFRAMES
+#define DDB_PANICSTACKFRAMES 65535
+#endif
+int db_panicstackframes = DDB_PANICSTACKFRAMES;
+
static int db_rw_internal_variable(const struct db_variable *, db_expr_t *,
int);
@@ -73,16 +78,62 @@
/* XXX must all be ints for sysctl. */
const struct db_variable db_vars[] = {
- { "radix", (void *)&db_radix, db_rw_internal_variable, NULL },
- { "maxoff", (void *)&db_maxoff, db_rw_internal_variable, NULL },
- { "maxwidth", (void *)&db_max_width, db_rw_internal_variable, NULL },
- { "tabstops", (void *)&db_tab_stop_width, db_rw_internal_variable, NULL },
- { "lines", (void *)&db_max_line, db_rw_internal_variable, NULL },
- { "onpanic", (void *)&db_onpanic, db_rw_internal_variable, NULL },
- { "fromconsole", (void *)&db_fromconsole, db_rw_internal_variable, NULL },
- { "tee_msgbuf", (void *)&db_tee_msgbuf, db_rw_internal_variable, NULL },
+ {
+ .name = "fromconsole",
+ .valuep = &db_fromconsole,
+ .fcn = db_rw_internal_variable,
+ .modif = NULL,
+ },
+ {
+ .name = "maxoff",
+ .valuep = &db_maxoff,
+ .fcn = db_rw_internal_variable,
+ .modif = NULL,
+ },
+ {
+ .name = "maxwidth",
+ .valuep = &db_max_width,
+ .fcn = db_rw_internal_variable,
+ .modif = NULL,
+ },
+ {
+ .name = "lines",
+ .valuep = &db_max_line,
+ .fcn = db_rw_internal_variable,
+ .modif = NULL,
+ },
+ {
+ .name = "onpanic",
+ .valuep = &db_onpanic,
+ .fcn = db_rw_internal_variable,
+ .modif = NULL,
+ },
+ {
+ .name = "panicstackframes",
+ .valuep = &db_panicstackframes,
+ .fcn = db_rw_internal_variable,
+ .modif = NULL,
+ },
+ {
+ .name = "radix",
+ .valuep = &db_radix,
+ .fcn = db_rw_internal_variable,
+ .modif = NULL,
+ },
+ {
+ .name = "tabstops",
+ .valuep = &db_tab_stop_width,
+ .fcn = db_rw_internal_variable,
+ .modif = NULL,
+ },
+ {
+ .name = "tee_msgbuf",
+ .valuep = &db_tee_msgbuf,
+ .fcn = db_rw_internal_variable,
+ .modif = NULL,
+ },
};
-const struct db_variable * const db_evars = db_vars + sizeof(db_vars)/sizeof(db_vars[0]);
+const struct db_variable * const db_evars = db_vars + __arraycount(db_vars);
/*
* ddb command line access to the DDB variables defined above.
@@ -154,13 +205,18 @@
SYSCTL_DESCR("Whether to tee ddb output to the msgbuf"),
NULL, 0, &db_tee_msgbuf, 0,
CTL_DDB, CTL_CREATE, CTL_EOL);
-
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
CTLTYPE_STRING, "commandonenter",
SYSCTL_DESCR("Command to be executed on each ddb enter"),
NULL, 0, db_cmd_on_enter, DB_LINE_MAXLEN,
CTL_DDB, CTL_CREATE, CTL_EOL);
+ sysctl_createv(clog, 0, NULL, NULL,
+ CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
+ CTLTYPE_INT, "panicstackframes",
+ SYSCTL_DESCR("Number of stack frames to print on panic"),
+ NULL, 0, &db_panicstackframes, 0,
+ CTL_DDB, CTL_CREATE, CTL_EOL);
}
#endif /* _KERNEL */
@@ -223,7 +279,7 @@
int (*func)(const struct db_variable *, db_expr_t *, int) = vp->fcn;
if (func == FCN_NULL)
- *valuep = *(vp->valuep);
+ *valuep = *(db_expr_t *)vp->valuep;
else
(*func)(vp, valuep, DB_VAR_GET);
}
@@ -234,7 +290,7 @@
int (*func)(const struct db_variable *, db_expr_t *, int) = vp->fcn;
if (func == FCN_NULL)
- *(vp->valuep) = *valuep;
+ *(db_expr_t *)vp->valuep = *valuep;
else
(*func)(vp, valuep, DB_VAR_SET);
}
diff -r 93ac49638f90 -r 27b43a5d9752 sys/ddb/db_variables.h
--- a/sys/ddb/db_variables.h Thu Dec 28 15:12:15 2017 +0000
+++ b/sys/ddb/db_variables.h Thu Dec 28 17:51:19 2017 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: db_variables.h,v 1.15 2007/02/22 04:38:06 matt Exp $ */
+/* $NetBSD: db_variables.h,v 1.16 2017/12/28 17:51:19 christos Exp $ */
/*
* Mach Operating System
@@ -37,7 +37,7 @@
*/
struct db_variable {
const char *name; /* Name of variable */
- long *valuep; /* value of variable */
+ void *valuep; /* value of variable */
/* function to call when reading/writing */
int (*fcn)(const struct db_variable *, db_expr_t *, int);
const char *modif;
diff -r 93ac49638f90 -r 27b43a5d9752 sys/ddb/ddbvar.h
--- a/sys/ddb/ddbvar.h Thu Dec 28 15:12:15 2017 +0000
+++ b/sys/ddb/ddbvar.h Thu Dec 28 17:51:19 2017 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: ddbvar.h,v 1.11 2013/02/10 11:04:20 apb Exp $ */
+/* $NetBSD: ddbvar.h,v 1.12 2017/12/28 17:51:19 christos Exp $ */
/*-
* Copyright (c) 1996, 1997 The NetBSD Foundation, Inc.
@@ -38,6 +38,7 @@
extern int db_onpanic;
extern int db_fromconsole;
+extern int db_panicstackframes;
extern int db_tee_msgbuf;
extern void db_panic(void);
diff -r 93ac49638f90 -r 27b43a5d9752 sys/ddb/files.ddb
--- a/sys/ddb/files.ddb Thu Dec 28 15:12:15 2017 +0000
+++ b/sys/ddb/files.ddb Thu Dec 28 17:51:19 2017 +0000
@@ -1,11 +1,11 @@
-# $NetBSD: files.ddb,v 1.10 2014/11/16 05:46:27 uebayasi Exp $
+# $NetBSD: files.ddb,v 1.11 2017/12/28 17:51:19 christos Exp $
#
# DDB options
#
defflag opt_ddb.h DDB DDB_VERBOSE_HELP
defparam opt_ddbparam.h DDB_FROMCONSOLE DDB_ONPANIC DDB_HISTORY_SIZE
- DDB_BREAK_CHAR DDB_KEYCODE
+ DDB_BREAK_CHAR DDB_KEYCODE DDB_PANICSTACKFRAMES
DDB_COMMANDONENTER DB_MAX_LINE
define ddb
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