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-rw-r--r--erts/emulator/beam/dist.c68
1 files changed, 44 insertions, 24 deletions
diff --git a/erts/emulator/beam/dist.c b/erts/emulator/beam/dist.c
index fdf307da1b..f203d85ca9 100644
--- a/erts/emulator/beam/dist.c
+++ b/erts/emulator/beam/dist.c
@@ -937,6 +937,24 @@ erts_dsig_send_demonitor(ErtsDSigData *dsdp, Eterm watcher,
return res;
}
+static int can_send_seqtrace_token(ErtsSendContext* ctx, Eterm token) {
+ Eterm label;
+
+ if (ctx->dep->flags & DFLAG_BIG_SEQTRACE_LABELS) {
+ /* The other end is capable of handling arbitrary seq_trace labels. */
+ return 1;
+ }
+
+ /* The other end only tolerates smalls, but since we could potentially be
+ * talking to an old 32-bit emulator from a 64-bit one, we have to check
+ * whether the label is small on any emulator. */
+ label = SEQ_TRACE_T_LABEL(token);
+
+ return is_small(label) &&
+ signed_val(label) <= (ERTS_SINT32_MAX >> _TAG_IMMED1_SIZE) &&
+ signed_val(label) >= (ERTS_SINT32_MIN >> _TAG_IMMED1_SIZE);
+}
+
int
erts_dsig_send_msg(Eterm remote, Eterm message, ErtsSendContext* ctx)
{
@@ -970,37 +988,38 @@ erts_dsig_send_msg(Eterm remote, Eterm message, ErtsSendContext* ctx)
"%T", remote);
msize = size_object(message);
if (have_seqtrace(token)) {
- tok_label = signed_val(SEQ_TRACE_T_LABEL(token));
+ tok_label = SEQ_TRACE_T_DTRACE_LABEL(token);
tok_lastcnt = signed_val(SEQ_TRACE_T_LASTCNT(token));
tok_serial = signed_val(SEQ_TRACE_T_SERIAL(token));
}
}
#endif
- if (token != NIL) {
- Eterm el1, el2;
- if (ctx->dep->flags & DFLAG_SEND_SENDER) {
- el1 = make_small(DOP_SEND_SENDER_TT);
- el2 = sender->common.id;
- }
- else {
- el1 = make_small(DOP_SEND_TT);
- el2 = am_Empty;
- }
- ctl = TUPLE4(&ctx->ctl_heap[0], el1, el2, remote, token);
- }
- else {
- Eterm el1, el2;
+ {
+ Eterm dist_op, sender_id;
+ int send_token;
+
+ send_token = (token != NIL && can_send_seqtrace_token(ctx, token));
+
if (ctx->dep->flags & DFLAG_SEND_SENDER) {
- el1 = make_small(DOP_SEND_SENDER);
- el2 = sender->common.id;
+ dist_op = make_small(send_token ?
+ DOP_SEND_SENDER_TT :
+ DOP_SEND_SENDER);
+ sender_id = sender->common.id;
+ } else {
+ dist_op = make_small(send_token ?
+ DOP_SEND_TT :
+ DOP_SEND);
+ sender_id = am_Empty;
}
- else {
- el1 = make_small(DOP_SEND);
- el2 = am_Empty;
+
+ if (send_token) {
+ ctl = TUPLE4(&ctx->ctl_heap[0], dist_op, sender_id, remote, token);
+ } else {
+ ctl = TUPLE3(&ctx->ctl_heap[0], dist_op, sender_id, remote);
}
- ctl = TUPLE3(&ctx->ctl_heap[0], el1, el2, remote);
}
+
DTRACE6(message_send, sender_name, receiver_name,
msize, tok_label, tok_lastcnt, tok_serial);
DTRACE7(message_send_remote, sender_name, node_name, receiver_name,
@@ -1046,19 +1065,20 @@ erts_dsig_send_reg_msg(Eterm remote_name, Eterm message,
"{%T,%s}", remote_name, node_name);
msize = size_object(message);
if (have_seqtrace(token)) {
- tok_label = signed_val(SEQ_TRACE_T_LABEL(token));
+ tok_label = SEQ_TRACE_T_DTRACE_LABEL(token);
tok_lastcnt = signed_val(SEQ_TRACE_T_LASTCNT(token));
tok_serial = signed_val(SEQ_TRACE_T_SERIAL(token));
}
}
#endif
- if (token != NIL)
+ if (token != NIL && can_send_seqtrace_token(ctx, token))
ctl = TUPLE5(&ctx->ctl_heap[0], make_small(DOP_REG_SEND_TT),
sender->common.id, am_Empty, remote_name, token);
else
ctl = TUPLE4(&ctx->ctl_heap[0], make_small(DOP_REG_SEND),
sender->common.id, am_Empty, remote_name);
+
DTRACE6(message_send, sender_name, receiver_name,
msize, tok_label, tok_lastcnt, tok_serial);
DTRACE7(message_send_remote, sender_name, node_name, receiver_name,
@@ -1110,7 +1130,7 @@ erts_dsig_send_exit_tt(ErtsDSigData *dsdp, Eterm local, Eterm remote,
erts_snprintf(reason_str, sizeof(DTRACE_CHARBUF_NAME(reason_str)),
"%T", reason);
if (have_seqtrace(token)) {
- tok_label = signed_val(SEQ_TRACE_T_LABEL(token));
+ tok_label = SEQ_TRACE_T_DTRACE_LABEL(token);
tok_lastcnt = signed_val(SEQ_TRACE_T_LASTCNT(token));
tok_serial = signed_val(SEQ_TRACE_T_SERIAL(token));
}