void
sml_heap_gc()
{
GIANT_LOCK(NULL);
STOP_THE_WORLD();
sml_rootset_enum_ptr(trace, MAJOR);
sml_malloc_pop_and_mark(trace, MAJOR);
sml_check_finalizer(trace, MAJOR);
sml_malloc_sweep(MAJOR);
RUN_THE_WORLD();
GIANT_UNLOCK();
sml_run_finalizer(NULL);
}
static void
do_gc(void)
{
#ifdef GCTIME
sml_timer_t b_start, b_end;
sml_time_t gctime;
#endif /* GCTIME */
#ifdef GCSTAT
sml_time_t t;
#endif /* GCSTAT */
STOP_THE_WORLD();
#ifdef GCSTAT
if (gcstat.verbose >= GCSTAT_VERBOSE_COUNT) {
stat_notice("---");
stat_notice("event: start gc");
stat_notice("trigger: %u", gcstat.last.trigger);
print_alloc_count();
print_heap_occupancy();
}
clear_last_counts();
#endif /* GCSTAT */
#ifdef GCTIME
gcstat.gc.count++;
sml_timer_now(b_start);
#endif /* GCTIME */
heap_space_unprotect(&sml_heap_to_space);
DBG(("start gc (%lu/%lu used) %p -> %p",
(unsigned long)HEAP_USED(sml_heap_from_space),
(unsigned long)HEAP_TOTAL(sml_heap_from_space),
sml_heap_from_space.base, sml_heap_to_space.base));
sml_rootset_enum_ptr(forward, MAJOR);
DBG(("copying root completed"));
/* forward objects which are reachable from live objects. */
forward_region(HEAP_START(sml_heap_to_space));
sml_malloc_pop_and_mark(forward_deep, MAJOR);
#ifndef FAIR_COMPARISON
/* check finalization */
sml_check_finalizer(forward_deep, MAJOR);
#endif /* FAIR_COMPARISON */
/* clear from-space, and swap two spaces. */
heap_space_clear(&sml_heap_from_space);
heap_space_swap();
heap_space_protect(&sml_heap_to_space);
/* sweep malloc heap */
sml_malloc_sweep(MAJOR);
DBG(("gc finished. remain %lu bytes",
(unsigned long)HEAP_USED(sml_heap_from_space)));
#ifdef GCTIME
sml_timer_now(b_end);
#endif /* GCTIME */
#ifdef GCTIME
sml_timer_dif(b_start, b_end, gctime);
sml_time_accum(gctime, gcstat.gc.total_time);
#endif /* GCTIME */
#ifdef GCSTAT
gcstat.gc.total_copy_bytes += gcstat.last.copy_bytes;
gcstat.gc.total_copy_count += gcstat.last.copy_count;
gcstat.gc.total_forward_count += gcstat.last.forward_count;
if (gcstat.verbose >= GCSTAT_VERBOSE_GC) {
sml_timer_dif(gcstat.exec_begin, b_start, t);
stat_notice("time: "TIMEFMT, TIMEARG(t));
stat_notice("---");
stat_notice("event: end gc");
sml_timer_dif(gcstat.exec_begin, b_end, t);
stat_notice("time: "TIMEFMT, TIMEARG(t));
stat_notice("duration: "TIMEFMT, TIMEARG(gctime));
stat_notice("copy: %u", gcstat.last.copy_count);
stat_notice("forward: %u", gcstat.last.forward_count);
stat_notice("copy_bytes: %lu",
(unsigned long)gcstat.last.copy_bytes);
print_heap_occupancy();
}
#endif /* GCSTAT */
RUN_THE_WORLD();
}
