Stuff

467     do {
468         p = malloc(nbytes);
469 
470         if (p == NULL) {
471             p = Out_Of_Space(nbytes);
472         }
473 
474 #ifdef HEAP_CHECK
475         Allocated(block_size(p));
476 #endif
477         /* get 8-byte alignment */
478         alignment = ((unsigned long)p) & 7;
479 
480         if (alignment == 0) {
481             if (align4 && *(int *)(p-4) == MAGIC_FILLER)
482                 // don't free. grab a new one.
483                 continue;  // magic is there by chance! 
484                            // (this case is remotely possible on Win95 only)
485             return p;   // already 8-aligned, should happen most of the time
486         }
487         if (alignment != 4)
488             RTFatal("malloc block NOT 4-byte aligned!\n");
489 
490         if (align4) {
491             *(int *)p = MAGIC_FILLER;
492             return p+4;
493         }
494 
495         /* first occurrence of a 4-aligned block */
496         free(p);
497         align4 = 4;  // start handling 4-aligned blocks
498         nbytes += align4;
499     } while (TRUE);