void erts_save_message_in_proc(Process *p, ErtsMessage *msgp)
{
ErlHeapFragment *hfp;
if (msgp->data.attached == ERTS_MSG_COMBINED_HFRAG)
hfp = &msgp->hfrag;
else if (msgp->data.attached) {
hfp = msgp->data.heap_frag;
}
else {
erts_free_message(msgp);
return; /* Nothing to save */
}
while (1) {
struct erl_off_heap_header *ohhp = hfp->off_heap.first;
if (ohhp) {
for ( ; ohhp->next; ohhp = ohhp->next)
;
ohhp->next = p->off_heap.first;
p->off_heap.first = hfp->off_heap.first;
hfp->off_heap.first = NULL;
}
p->off_heap.overhead += hfp->off_heap.overhead;
hfp->off_heap.overhead = 0;
p->mbuf_sz += hfp->used_size;
if (!hfp->next)
break;
hfp = hfp->next;
}
msgp->next = p->msg_frag;
p->msg_frag = msgp;
}
void
erts_cleanup_messages(ErtsMessage *msgp)
{
ErtsMessage *mp = msgp;
while (mp) {
ErtsMessage *fmp;
ErlHeapFragment *bp;
if (is_non_value(ERL_MESSAGE_TERM(mp))) {
if (is_not_immed(ERL_MESSAGE_TOKEN(mp))) {
bp = (ErlHeapFragment *) mp->data.dist_ext->ext_endp;
erts_cleanup_offheap(&bp->off_heap);
}
if (mp->data.dist_ext)
erts_free_dist_ext_copy(mp->data.dist_ext);
}
else {
if (mp->data.attached != ERTS_MSG_COMBINED_HFRAG)
bp = mp->data.heap_frag;
else {
bp = mp->hfrag.next;
erts_cleanup_offheap(&mp->hfrag.off_heap);
}
if (bp)
free_message_buffer(bp);
}
fmp = mp;
mp = mp->next;
erts_free_message(fmp);
}
}
void
erts_cleanup_messages(ErtsMessage *msgp)
{
ErtsMessage *mp = msgp;
while (mp) {
ErtsMessage *fmp;
erts_cleanup_message(mp);
fmp = mp;
mp = mp->next;
erts_free_message(fmp);
}
}
void
erts_queue_dist_message(Process *rcvr,
ErtsProcLocks rcvr_locks,
ErtsDistExternal *dist_ext,
Eterm token,
Eterm from)
{
ErtsMessage* mp;
#ifdef USE_VM_PROBES
Sint tok_label = 0;
Sint tok_lastcnt = 0;
Sint tok_serial = 0;
#endif
erts_aint_t state;
ERTS_LC_ASSERT(rcvr_locks == erts_proc_lc_my_proc_locks(rcvr));
mp = erts_alloc_message(0, NULL);
mp->data.dist_ext = dist_ext;
ERL_MESSAGE_TERM(mp) = THE_NON_VALUE;
#ifdef USE_VM_PROBES
ERL_MESSAGE_DT_UTAG(mp) = NIL;
if (token == am_have_dt_utag)
ERL_MESSAGE_TOKEN(mp) = NIL;
else
#endif
ERL_MESSAGE_TOKEN(mp) = token;
if (!(rcvr_locks & ERTS_PROC_LOCK_MSGQ)) {
if (erts_proc_trylock(rcvr, ERTS_PROC_LOCK_MSGQ) == EBUSY) {
ErtsProcLocks need_locks = ERTS_PROC_LOCK_MSGQ;
ErtsProcLocks unlocks =
rcvr_locks & ERTS_PROC_LOCKS_HIGHER_THAN(ERTS_PROC_LOCK_MSGQ);
if (unlocks) {
erts_proc_unlock(rcvr, unlocks);
need_locks |= unlocks;
}
erts_proc_lock(rcvr, need_locks);
}
}
state = erts_atomic32_read_acqb(&rcvr->state);
if (state & (ERTS_PSFLG_PENDING_EXIT|ERTS_PSFLG_EXITING)) {
if (!(rcvr_locks & ERTS_PROC_LOCK_MSGQ))
erts_proc_unlock(rcvr, ERTS_PROC_LOCK_MSGQ);
/* Drop message if receiver is exiting or has a pending exit ... */
erts_cleanup_messages(mp);
}
else
if (IS_TRACED_FL(rcvr, F_TRACE_RECEIVE)) {
if (from == am_Empty)
from = dist_ext->dep->sysname;
/* Ahh... need to decode it in order to trace it... */
if (!(rcvr_locks & ERTS_PROC_LOCK_MSGQ))
erts_proc_unlock(rcvr, ERTS_PROC_LOCK_MSGQ);
if (!erts_decode_dist_message(rcvr, rcvr_locks, mp, 0))
erts_free_message(mp);
else {
Eterm msg = ERL_MESSAGE_TERM(mp);
token = ERL_MESSAGE_TOKEN(mp);
#ifdef USE_VM_PROBES
if (DTRACE_ENABLED(message_queued)) {
DTRACE_CHARBUF(receiver_name, DTRACE_TERM_BUF_SIZE);
dtrace_proc_str(rcvr, receiver_name);
if (have_seqtrace(token)) {
tok_label = signed_val(SEQ_TRACE_T_LABEL(token));
tok_lastcnt = signed_val(SEQ_TRACE_T_LASTCNT(token));
tok_serial = signed_val(SEQ_TRACE_T_SERIAL(token));
}
DTRACE6(message_queued,
receiver_name, size_object(msg), rcvr->msg.len,
tok_label, tok_lastcnt, tok_serial);
}
#endif
erts_queue_message(rcvr, rcvr_locks, mp, msg, from);
}
}
else {
/* Enqueue message on external format */
#ifdef USE_VM_PROBES
if (DTRACE_ENABLED(message_queued)) {
DTRACE_CHARBUF(receiver_name, DTRACE_TERM_BUF_SIZE);
dtrace_proc_str(rcvr, receiver_name);
if (have_seqtrace(token)) {
tok_label = signed_val(SEQ_TRACE_T_LABEL(token));
tok_lastcnt = signed_val(SEQ_TRACE_T_LASTCNT(token));
tok_serial = signed_val(SEQ_TRACE_T_SERIAL(token));
}
/*
* TODO: We don't know the real size of the external message here.
* -1 will appear to a D script as 4294967295.
*/
DTRACE6(message_queued, receiver_name, -1, rcvr->msg.len + 1,
tok_label, tok_lastcnt, tok_serial);
}
#endif
LINK_MESSAGE(rcvr, mp, &mp->next, 1);
if (!(rcvr_locks & ERTS_PROC_LOCK_MSGQ))
erts_proc_unlock(rcvr, ERTS_PROC_LOCK_MSGQ);
erts_proc_notify_new_message(rcvr,
rcvr_locks
);
}
}