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Annotation of xinu/sys/mdump.c, revision 1.1

1.1     ! root        1: /* mdump.c - mdump */
        !             2: 
        !             3: #include <conf.h>
        !             4: #include <kernel.h>
        !             5: #include <proc.h>
        !             6: #include <mem.h>
        !             7: 
        !             8: /*------------------------------------------------------------------------
        !             9:  *  mdump  --  dump free memory list
        !            10:  *------------------------------------------------------------------------
        !            11:  */
        !            12: mdump()
        !            13: {
        !            14:        PStype  ps;
        !            15:        int     i;
        !            16:        struct  mblock  *mptr;
        !            17:        unsigned free;
        !            18:        unsigned avail;
        !            19:        unsigned stkmem;
        !            20: 
        !            21:        disable(ps);
        !            22: 
        !            23:        /* calculate current size of free memory and stack memory */
        !            24: 
        !            25:        for( free=0,mptr=memlist.mnext ; mptr!=(struct mblock*)NULL ;
        !            26:            mptr=mptr->mnext)
        !            27:                free += mptr->mlen;
        !            28:        for (stkmem=0,i=0 ; i<NPROC ; i++) {
        !            29:                if (proctab[i].pstate != PRFREE)
        !            30:                        stkmem += (unsigned)proctab[i].pstklen;
        !            31:        }
        !            32:        kprintf("Memory: %u bytes real memory, %u text, %u data, %u bss\n",
        !            33:                (unsigned)(sizeof(int)) + (unsigned)maxaddr, (unsigned) &etext,
        !            34:                (unsigned) &edata - (unsigned) &etext,
        !            35:                (unsigned) &end - (unsigned) &edata);
        !            36:        avail = (unsigned)maxaddr - (unsigned) &end + (unsigned)(sizeof(int));
        !            37:        kprintf(" initially: %5u avail\n", avail);
        !            38:        kprintf(" presently: %5u avail, %5u stack, %5u heap\n",
        !            39:                free, stkmem, avail - stkmem - free);
        !            40:        kprintf(" free list:\n");
        !            41:        for( mptr=memlist.mnext ; mptr!=(struct mblock *)NULL ;
        !            42:             mptr=mptr->mnext)
        !            43:                kprintf("   block at %6o, length %5u (0%o)\n",
        !            44:                        mptr, mptr->mlen, mptr->mlen);
        !            45:        restore(ps);
        !            46: }

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