mirror of
https://github.com/raphnet/gc_n64_usb-v3
synced 2024-12-21 23:08:53 -05:00
61 lines
1.1 KiB
C
61 lines
1.1 KiB
C
|
#include <stdio.h>
|
||
|
|
#include <stdint.h>
|
||
|
|
#include <avr/io.h>
|
||
|
|
#include <util/atomic.h>
|
||
|
|
#include "stkchk.h"
|
||
|
|
|
||
|
|
extern uint16_t __stack;
|
||
|
|
extern uint16_t _end;
|
||
|
|
|
||
|
|
/** Write a canary at the end of the stack. */
|
||
|
|
void stkchk_init(void)
|
||
|
|
{
|
||
|
|
*((&_end)-1) = 0xDEAD;
|
||
|
|
}
|
||
|
|
|
||
|
|
/** Check if the canary is still alive.
|
||
|
|
*
|
||
|
|
* Call this perdiocally to check if the
|
||
|
|
* stack grew too large.
|
||
|
|
**/
|
||
|
|
char stkchk_verify(void)
|
||
|
|
{
|
||
|
|
if (*((&_end)-1) != 0xDEAD) {
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* In order to get an approximate idea of how
|
||
|
|
* much stack you are using, this can be called
|
||
|
|
* at strategic places where you know the
|
||
|
|
* call stack is deep or where large automatic
|
||
|
|
* buffers are used.
|
||
|
|
*/
|
||
|
|
#ifdef STKCHK_WITH_STATUS_CHECK
|
||
|
|
void stkchk(const char *fname)
|
||
|
|
{
|
||
|
|
static int max_usage = 0;
|
||
|
|
uint16_t end = ((uint16_t)&_end);
|
||
|
|
uint16_t s_top = ((uint16_t)&__stack);
|
||
|
|
uint16_t s_cur = SPL | SPH<<8;
|
||
|
|
uint16_t used, s_size;
|
||
|
|
uint8_t grew = 0;
|
||
|
|
|
||
|
|
ATOMIC_BLOCK(ATOMIC_RESTORESTATE)
|
||
|
|
{
|
||
|
|
used = s_top - s_cur;
|
||
|
|
s_size = s_top - end;
|
||
|
|
if (used > max_usage) {
|
||
|
|
max_usage = used;
|
||
|
|
grew = 1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (grew) {
|
||
|
|
printf("[stkchk] %s: %d/%d\r\n", fname, used, s_size);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
#endif
|