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escape (fix): a function taken as a value keeps what it returns, and an entry is walked

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Two more holes of the arena's family, found from ECS's births:
- a function called through a function value (UiClass.make's cmp_x_new, a step list, a System's tick)
  has its result flow nowhere the analysis can see, so what it returned looked LOCAL - and a caller
  keeping it (ludic.ui's instance table) would keep scratch. Every function taken as a value (fn f)
  now has its result kept.
- an entry block has no name, and the analysis only walked named declarations: what an entry stored
  was never seen. It is walked now.
examples/lang/arena_fnval.ludic (a factory in a field, its records kept by a pool across frames)
crashed poisoned before and prints '5 1053' as the heap does now; in ludic-dev test. Maroon Lake:
component constructors are kept, not births (birth_leaks 115 -> 103); what fn values return is kept
(frame_allocs 194 -> 210, frame_keeps 151 -> 162); 5293 sites local, 6586 kept.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Orkun ÇAKILKAYA 2026-09-28 20:10:18 +03:00
parent b12b66e89a
commit 5d34d0fd09
6 changed files with 62658 additions and 61981 deletions
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4
selfhost/backend/emit_frame.ludic
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@ -249,7 +249,7 @@ function deps_keeps(f: pointer, seen: []bool) -> void {
while s < len(g_es_site) {
let c = g_es_site_cls[s]
let fi = g_es_site_fn[s]
if c >= 0 and fi >= 0 and (g_es_flag[c] & ES_ESC) != 0 and not g_es_site_aok[s] and not g_es_site_grow[s] {
if c >= 0 and fi >= 0 and g_es_fnode[fi].s != null and (g_es_flag[c] & ES_ESC) != 0 and not g_es_site_aok[s] and not g_es_site_grow[s] {
let d = g_es_fnode[fi]
let k = dr_index(d.s)
if k >= 0 and seen[k] and not fr_alloc_ok(d.s) and d.file != null and not is_runtime_file(d.file) {
@ -319,7 +319,7 @@ function deps_births(f: pointer, seen: []bool) -> void {
let c = g_es_site_cls[s]
let fi = g_es_site_fn[s]
let site = g_es_site[s]
if c >= 0 and fi >= 0 and (g_es_flag[c] & (ES_ESC | ES_FREED)) == 0 and not g_es_site_aok[s] and not g_es_site_grow[s] {
if c >= 0 and fi >= 0 and g_es_fnode[fi].s != null and (g_es_flag[c] & (ES_ESC | ES_FREED)) == 0 and not g_es_site_aok[s] and not g_es_site_grow[s] {
let d = g_es_fnode[fi]
let k = dr_index(d.s)
let inframe = k >= 0 and seen[k]