minix/kernel/debug.c
Ben Gras 35a108b911 panic() cleanup.
this change
   - makes panic() variadic, doing full printf() formatting -
     no more NO_NUM, and no more separate printf() statements
     needed to print extra info (or something in hex) before panicing
   - unifies panic() - same panic() name and usage for everyone -
     vm, kernel and rest have different names/syntax currently
     in order to implement their own luxuries, but no longer
   - throws out the 1st argument, to make source less noisy.
     the panic() in syslib retrieves the server name from the kernel
     so it should be clear enough who is panicing; e.g.
         panic("sigaction failed: %d", errno);
     looks like:
         at_wini(73130): panic: sigaction failed: 0
         syslib:panic.c: stacktrace: 0x74dc 0x2025 0x100a
   - throws out report() - printf() is more convenient and powerful
   - harmonizes/fixes the use of panic() - there were a few places
     that used printf-style formatting (didn't work) and newlines
     (messes up the formatting) in panic()
   - throws out a few per-server panic() functions
   - cleans up a tie-in of tty with panic()

merging printf() and panic() statements to be done incrementally.
2010-03-05 15:05:11 +00:00

147 lines
3.5 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;
FIXME("check_runqueues being done");
#define MYPANIC(msg) { \
panic("check_runqueues:%s:%d: %s\n", file, line, msg); \
}
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]) {
printf("head but no tail in %d\n", q);
MYPANIC("scheduling error");
}
if (!rdy_head[q] && rdy_tail[q]) {
printf("tail but no head in %d\n", q);
MYPANIC("scheduling error");
}
if (rdy_tail[q] && rdy_tail[q]->p_nextready != NIL_PROC) {
printf("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, RTS_SLOT_FREE)) {
printf("scheduling error: dead proc q %d %d\n",
q, xp->p_endpoint);
MYPANIC("dead proc on run queue");
}
if (!xp->p_ready) {
printf("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) {
printf("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) {
printf("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) {
printf("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))
continue;
if(xp->p_ready && ! xp->p_found) {
printf("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 */
PUBLIC char *
rtsflagstr(int flags)
{
static char str[100];
str[0] = '\0';
#define FLAG(n) if(flags & n) { strcat(str, #n " "); }
FLAG(RTS_SLOT_FREE);
FLAG(RTS_PROC_STOP);
FLAG(RTS_SENDING);
FLAG(RTS_RECEIVING);
FLAG(RTS_SIGNALED);
FLAG(RTS_SIG_PENDING);
FLAG(RTS_P_STOP);
FLAG(RTS_NO_PRIV);
FLAG(RTS_NO_ENDPOINT);
FLAG(RTS_VMINHIBIT);
FLAG(RTS_PAGEFAULT);
FLAG(RTS_VMREQUEST);
FLAG(RTS_VMREQTARGET);
FLAG(RTS_PREEMPTED);
FLAG(RTS_NO_QUANTUM);
return str;
}
PUBLIC char *
miscflagstr(int flags)
{
static char str[100];
str[0] = '\0';
FLAG(MF_REPLY_PEND);
FLAG(MF_ASYNMSG);
FLAG(MF_FULLVM);
FLAG(MF_DELIVERMSG);
FLAG(MF_KCALL_RESUME);
return str;
}