+ // otherwise... we're doing a heap profile that is restricted to
+ // some combination of lag, drag, void or use. We've kept all the
+ // census info for all censuses so far, but we still need to
+ // aggregate the counters forwards.
+
+ arena = newArena();
+ acc = allocHashTable();
+ ctrs = NULL;
+
+ for (t = 1; t < era; t++) {
+
+ // first look through all the counters we're aggregating
+ for (c = ctrs; c != NULL; c = c->next) {
+ // if one of the totals is non-zero, then this closure
+ // type must be present in the heap at this census time...
+ d = lookupHashTable(censuses[t].hash, (StgWord)c->identity);
+
+ if (d == NULL) {
+ // if this closure identity isn't present in the
+ // census for this time period, then our running
+ // totals *must* be zero.
+ ASSERT(c->c.ldv.void_total == 0 && c->c.ldv.drag_total == 0);
+
+ // debugCCS(c->identity);
+ // debugBelch(" census=%d void_total=%d drag_total=%d\n",
+ // t, c->c.ldv.void_total, c->c.ldv.drag_total);
+ } else {
+ d->c.ldv.void_total += c->c.ldv.void_total;
+ d->c.ldv.drag_total += c->c.ldv.drag_total;
+ c->c.ldv.void_total = d->c.ldv.void_total;
+ c->c.ldv.drag_total = d->c.ldv.drag_total;
+
+ ASSERT( c->c.ldv.void_total >= 0 );
+ ASSERT( c->c.ldv.drag_total >= 0 );
+ }
+ }