minix/kernel/debug.c
Ben Gras e3ca89c0be more sanity checking. sanity checking disabled by default.
give every process a full pagetable by default now.

first step to disabling kernel page table code (processes
might not have page tables -> no address translation).
2009-05-12 11:35:01 +00:00

105 lines
3 KiB
C

/* This file implements kernel debugging functionality that is not included
* in the standard kernel. Available functionality includes timing of lock
* functions and sanity checking of the scheduling queues.
*/
#include "kernel.h"
#include "proc.h"
#include "debug.h"
#include <minix/sysutil.h>
#include <limits.h>
#include <string.h>
#if DEBUG_SCHED_CHECK /* only include code if enabled */
#define MAX_LOOP (NR_PROCS + NR_TASKS)
PUBLIC void
check_runqueues_f(char *file, int line)
{
int q, l = 0;
register struct proc *xp;
if(!intr_disabled()) {
minix_panic("check_runqueues called with interrupts enabled", NO_NUM);
}
#define MYPANIC(msg) { \
kprintf("check_runqueues:%s:%d: %s\n", file, line, msg); \
minix_panic("check_runqueues failed", NO_NUM); \
}
for (xp = BEG_PROC_ADDR; xp < END_PROC_ADDR; ++xp) {
xp->p_found = 0;
if (l++ > MAX_LOOP) { MYPANIC("check error"); }
}
for (q=l=0; q < NR_SCHED_QUEUES; q++) {
if (rdy_head[q] && !rdy_tail[q]) {
kprintf("head but no tail in %d\n", q);
MYPANIC("scheduling error");
}
if (!rdy_head[q] && rdy_tail[q]) {
kprintf("tail but no head in %d\n", q);
MYPANIC("scheduling error");
}
if (rdy_tail[q] && rdy_tail[q]->p_nextready != NIL_PROC) {
kprintf("tail and tail->next not null in %d\n", q);
MYPANIC("scheduling error");
}
for(xp = rdy_head[q]; xp != NIL_PROC; xp = xp->p_nextready) {
vir_bytes vxp = (vir_bytes) xp, dxp;
if(vxp < (vir_bytes) BEG_PROC_ADDR || vxp >= (vir_bytes) END_PROC_ADDR) {
MYPANIC("xp out of range");
}
dxp = vxp - (vir_bytes) BEG_PROC_ADDR;
if(dxp % sizeof(struct proc)) {
MYPANIC("xp not a real pointer");
}
if(xp->p_magic != PMAGIC) {
MYPANIC("magic wrong in xp");
}
if (RTS_ISSET(xp, SLOT_FREE)) {
kprintf("scheduling error: dead proc q %d %d\n",
q, xp->p_endpoint);
MYPANIC("dead proc on run queue");
}
if (!xp->p_ready) {
kprintf("scheduling error: unready on runq %d proc %d\n",
q, xp->p_nr);
MYPANIC("found unready process on run queue");
}
if (xp->p_priority != q) {
kprintf("scheduling error: wrong priority q %d proc %d ep %d name %s\n",
q, xp->p_nr, xp->p_endpoint, xp->p_name);
MYPANIC("wrong priority");
}
if (xp->p_found) {
kprintf("scheduling error: double sched q %d proc %d\n",
q, xp->p_nr);
MYPANIC("proc more than once on scheduling queue");
}
xp->p_found = 1;
if (xp->p_nextready == NIL_PROC && rdy_tail[q] != xp) {
kprintf("sched err: last element not tail q %d proc %d\n",
q, xp->p_nr);
MYPANIC("scheduling error");
}
if (l++ > MAX_LOOP) MYPANIC("loop in schedule queue?");
}
}
l = 0;
for (xp = BEG_PROC_ADDR; xp < END_PROC_ADDR; ++xp) {
if(xp->p_magic != PMAGIC)
MYPANIC("p_magic wrong in proc table");
if (! isemptyp(xp) && xp->p_ready && ! xp->p_found) {
kprintf("sched error: ready proc %d not on queue\n", xp->p_nr);
MYPANIC("ready proc not on scheduling queue");
if (l++ > MAX_LOOP) { MYPANIC("loop in debug.c?"); }
}
}
}
#endif /* DEBUG_SCHED_CHECK */