// the head of the queue.
if (bd->gen_no == 0 && bd != exec_block) {
debugTrace(DEBUG_gc, "free exec block %p", bd->start);
// the head of the queue.
if (bd->gen_no == 0 && bd != exec_block) {
debugTrace(DEBUG_gc, "free exec block %p", bd->start);
debugBelch(" exec : %4lu\n", exec_blocks);
debugBelch(" free : %4lu\n", free_blocks);
debugBelch(" total : %4lu\n\n", live_blocks + free_blocks);
debugBelch(" exec : %4lu\n", exec_blocks);
debugBelch(" free : %4lu\n", free_blocks);
debugBelch(" total : %4lu\n\n", live_blocks + free_blocks);