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[lib][debugcommands] add 'stackstomp' command which intentionally blows the stack

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This commit is contained in:
Travis Geiselbrecht
2015-11-04 15:16:34 -08:00
parent 814ca4e8a5
commit 8021643b24
1 changed files with 23 additions and 7 deletions
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30
lib/debugcommands/debugcommands.c
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@@ -49,6 +49,7 @@ static int cmd_copy_mem(int argc, const cmd_args *argv);
static int cmd_chain(int argc, const cmd_args *argv);
static int cmd_sleep(int argc, const cmd_args *argv);
static int cmd_crash(int argc, const cmd_args *argv);
static int cmd_stackstomp(int argc, const cmd_args *argv);
STATIC_COMMAND_START
#if LK_DEBUGLEVEL > 0
@@ -63,6 +64,7 @@ STATIC_COMMAND_MASKED("fh", "fill range of memory by halfword", &cmd_fill_mem, C
STATIC_COMMAND_MASKED("fb", "fill range of memory by byte", &cmd_fill_mem, CMD_AVAIL_ALWAYS)
STATIC_COMMAND_MASKED("mc", "copy a range of memory", &cmd_copy_mem, CMD_AVAIL_ALWAYS)
STATIC_COMMAND("crash", "intentionally crash", &cmd_crash)
STATIC_COMMAND("stackstomp", "intentionally overrun the stack", &cmd_stackstomp)
#endif
#if LK_DEBUGLEVEL > 1
STATIC_COMMAND("mtest", "simple memory test", &cmd_memtest)
@@ -328,14 +330,28 @@ static int cmd_sleep(int argc, const cmd_args *argv)
static int cmd_crash(int argc, const cmd_args *argv)
{
/* should crash */
volatile uint32_t *ptr = (void *)1;
*ptr = 1;
/* should crash */
volatile uint32_t *ptr = (void *)1;
*ptr = 1;
/* if it didn't, panic the system */
panic("crash");
/* if it didn't, panic the system */
panic("crash");
return 0;
return 0;
}
// vim: set noexpandtab:
static int cmd_stackstomp(int argc, const cmd_args *argv)
{
for (size_t i = 0; i < DEFAULT_STACK_SIZE * 2; i++) {
uint8_t death[i];
memset(death, 0xaa, i);
thread_sleep(1);
}
printf("survived.\n");
return 0;
}