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fix(v4.0.0): a waiting node goes on passing on and paying; KILL is not held by a stuck node

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Found in the five-node test, each with a check that failed first:
- A node with answers it could not give to two stuck senders began no
  text at all.  It now holds back only text from a sender whose own
  answer is still with it.
- KILL waited to tell a stuck node, and a typed line that broke it left
  the nodes after it untold.  GONE is put with the messages waiting, as
  how text ended is, and goes when it can.
- So that 'tell, then wait' still works, AWAIT does what (IDLE) does but
  for beginning text: it looks through the messages waiting, offers what
  is to be passed on and what is owed, and sleeps in the wait.  A waiting
  node no longer keeps back what passes through it.
- A node in the wait with an offer on a port that turns out to have
  nothing on it is woken and told so (which port: 2 * V4_PORTS + k); no
  error is raised on it.  (GATE) makes it error 18; (IDLE) and AWAIT let
  the message go.  Before, removing a node raised 'No one on that port'
  on the unrelated text of a neighbour that had something queued for it.

make -C v4 test and sanitize at both widths, hosted-check.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
rajames
2026-10-08 01:00:33 -04:00
co-authored by Claude Opus 5.5
parent 353783726d
commit ec817a8264
9 changed files with 130 additions and 99 deletions
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v4/tests/test_fabric.c
+4 -4
View File
@@ -547,16 +547,16 @@ int main(void)
/* a port with nothing on it */
fresh();
a = loaded(0); offer(5, 7); wait_into(OUT); done_mark(); wait_for_ever();
CHECK(v4_asm_ok(&as), "a node that offers on a port nothing is wired to");
CHECK(v4_asm_ok(&as) && v4_fabric_wire_device(&f, a, 7, &sink), "a node that offers on a port nothing is wired to (the port it ends by reading has a device that gives nothing)");
for (i = 0; i < 50; i++) (void)v4_fabric_step(&f);
v4_fabric_gone_error(&f, 18);
for (i = 0; i < 50; i++) (void)v4_fabric_step(&f);
CHECK(v4_node_in_wait(&ND(a)->n) && ND(a)->n.faults == 0, "a bare node waits, though the fabric has an error for it");
v4_node_error_attach(&ND(a)->n, OUT + 20);
v4_node_fault_attach(&ND(a)->n, 900);
(void)v4_fabric_step(&f);
CHECK(!v4_node_in_wait(&ND(a)->n) && ND(a)->n.fault_kind == V4_FAULT_RAISED && ND(a)->n.fault_addr == 18 && ND(a)->n.offers == 0,
"one that can take an error has it raised, and its offer is withdrawn");
for (i = 0; i < 100 && ND(a)->n.mem[OUT + 2] == 0; i++) (void)v4_fabric_step(&f); /* until it has noted what it was told */
CHECK(!v4_node_in_wait(&ND(a)->n) && ND(a)->n.faults == 0 && ND(a)->n.offers == 0 && ND(a)->n.mem[OUT] == 0 && ND(a)->n.mem[OUT + 1] == 2 * (v4_cell)V4_PORTS + 5 && ND(a)->n.mem[OUT + 2] == 1,
"one that can take an error is woken and told there is nothing on port 5: no error is raised, and its offer is withdrawn: %ld", (long)ND(a)->n.mem[OUT + 1]);
/* a host with one node, whose devices always take */
fresh();