diff options
| author | jmcneill <jmcneill@NetBSD.org> | 2011-02-18 01:07:20 +0000 |
|---|---|---|
| committer | jmcneill <jmcneill@NetBSD.org> | 2011-02-18 01:07:20 +0000 |
| commit | 7b11d98d75fb129271bcb561b04fc04c3b0b33c3 (patch) | |
| tree | 99deb847a710fedb08929d15814a8e85f16d36e2 /sys/modules/panic/panic.c | |
| parent | 47c03ce2d7c552472db0c6c557c09cab3f02ed7b (diff) | |
add panic.kmod, an easy way to trigger a panic. takes a 'how' argument
to specify how to trigger the panic:
modload -s how=panic panic.kmod <-- just calls panic()
modload -s how=nullptr panic.kmod <-- null ptr deref
if how isn't specified, it defaults to 'panic'. feel free to add more.
Diffstat (limited to 'sys/modules/panic/panic.c')
| -rw-r--r-- | sys/modules/panic/panic.c | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/sys/modules/panic/panic.c b/sys/modules/panic/panic.c new file mode 100644 index 00000000000..20873890b67 --- /dev/null +++ b/sys/modules/panic/panic.c @@ -0,0 +1,85 @@ +/* $NetBSD: panic.c,v 1.1 2011/02/18 01:07:20 jmcneill Exp $ */ + +/* + * Copyright (c) 2011 Jared D. McNeill <jmcneill@invisible.ca> + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, + * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +__KERNEL_RCSID(0, "$NetBSD: panic.c,v 1.1 2011/02/18 01:07:20 jmcneill Exp $"); + +#include <sys/module.h> + +MODULE(MODULE_CLASS_MISC, panic, NULL); + +static void +panic_dopanic(void) +{ + /* just call panic */ + panic("oops"); +} + +static void +panic_donullptr(void) +{ + /* null ptr dereference */ + *(int *)NULL = 1; +} + +static const struct { + const char *name; + void (*func)(void); +} panic_howto[] = { + { "panic", panic_dopanic }, + { "nullptr", panic_donullptr }, +}; + +static int +panic_modcmd(modcmd_t cmd, void *opaque) +{ + if (cmd == MODULE_CMD_INIT) { + prop_dictionary_t props = opaque; + const char *how = NULL; + unsigned int i; + + if (props) + prop_dictionary_get_cstring_nocopy(props, "how", &how); + if (how == NULL) + how = "panic"; + + for (i = 0; i < __arraycount(panic_howto); i++) { + if (strcmp(how, panic_howto[i].name) == 0) { + panic_howto[i].func(); + break; + } + } + if (i == __arraycount(panic_howto)) + printf("%s: no how '%s'\n", __func__, how); + else + printf("%s: how '%s' didn't panic?\n", __func__, how); + + return EINVAL; + } + + return ENOTTY; +} |
