A field's default is one expression, walked at every 'new' of its record: marked LOCAL by a frame's
temporary, it stayed marked when a record a pool keeps was made from it, and that record's list came
from the frame's scratch. The marks are now taken off any node one walk found kept.
examples/lang/arena_defaults.ludic is the case (a pool's record made in frame 3, a temporary of the
same type every frame): foundations 1315baf crashes on it poisoned; this prints '497 124747', as the
heap does. In ludic-dev test.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
memory_final's gate crashed in all 13 scenarios at the first frame of play, R3D_ARENA_CHECK=1 reading
0xDD in ludic.ui's nd_take: a node the pool keeps had come from the frame's scratch. Two holes:
- a call to a generic (ui_kept(list, n)) names the generic, and the analysis knows only its instances
(ui_kept$UiNode), so the callee looked unknown - and an unknown callee was taken to keep nothing.
A generic's call now reaches every instance, and an unknown callee keeps everything it is handed,
but for a short list of intrinsics known to keep nothing; view() shares its list's storage.
- a push's growth into a parameter's list was LOCAL whenever the list was not seen kept, though a
parameter may be a state's list. A site is LOCAL now only when its class is neither ESC nor HEAP.
examples/lang/arena_pool.ludic is the shape (a pool keeping records across frames through a generic
push): built with --arena it prints '7 3498' poisoned on every reset and with the arena off, in
ludic-dev test. On the valley every ludic.ui pool site is kept; 5480 sites local, 6431 kept.
Also, from ECS: a record's field defaults are stored into it when it is made, a global's initializer
is kept, and a component's own functions are frame roots (they run while its page is open).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The escape analysis now follows which state a kept value is stored into (a state parameter, a state
global - each its own class - through the flows to and from it), and every heap site in the fence's
table carries that owner. The census writes, per owning state, what its sites hold and how much that
grew since judging began: 'owner NotesState holds 6400 (+5600 since judging began)'. A keep() or
intern() is a site of its own for this, never scratch and never reported as a keep or a birth. It
needs the analysis, so the arena's (or --escape-report's) build; this is what a soak watches.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The analysis gives each local its declared or inferred type (a record's field, a list's element,
a call's result, words/floats) and takes a value whose type is a number or a bool out of every flow
and store: a float copied out of a frame's floats into a state's no longer makes the frame's list
kept (shadow_fit, water_reflection_pass, layer_partition_lods). frame_keeps 190 -> 181 on the game;
birth_leaks 564 -> 581, the lists that copy was hiding now seen as made and dropped outside a frame.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Mem.scan() and R3D_ALLOC_SCAN=<frame> (at that frame's mark, when no function is running) walk
every heap block reachable from the program's globals - the states among them - conservatively: each
word that is a heap block's start (malloc_size says so) is followed, blocks made before tracking too.
A tracked block nothing reaches is a leak whatever a frame's totals say; they are summed by site and
printed ('alloc-scan: frame 39 - 32 bytes in 2 blocks ... reachable from no global or state', then
the sites). R3D_ALLOC_EXIT=1 runs the same scan as the program quits. A test: two records dropped in
frame 20 are the two found, the one pushed into a state is not.
The escape analysis now takes free(x) as giving x back (ES_FREED, flowing to what reached x) and a
print's argument as used up, so ludic deps --births lists only what is never given back.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
ludic deps --births lists every site the escape analysis finds kept by nothing and not the frame
arena's - boot and load code, a function spanning frames, frame code with the arena off - which is
made and dropped and never given back; birth_leaks is a number --check ratchets. A text used up by +
or == where it is made is freed at once and not counted; nor is what @alloc_ok covers.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
keep(x) copies a string, a slice (header and elements) or a record (shallow) onto the heap; intern(s)
hands back one heap string per distinct text from a fixed table in the runtime (FNV-1a, 65536 slots,
copied the first time; past 49152 only copied). Both are how frame code keeps what it made on purpose:
the escape analysis takes the copy as the heap's and leaves the argument LOCAL.
The analysis now records why a class escapes (the store, the event, the global it reached) and
ludic deps lists every allocation frame code makes and keeps - fkeep lines, 'ludic deps --keeps',
the frame_keeps number --check ratchets - leaving out what is under @alloc_ok and a push's growth
(25.5's capacities). --arena-strict (or 'arena strict') makes each an error naming the store, before
anything is emitted. A test: a template stored into a state is the one error; keep and intern of the
next two, an @alloc_ok push and a scratch temporary are not; 195 frames of arena resets under
R3D_ARENA_CHECK=1 later the kept and interned texts read as made, and intern gives the same string.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Behind ludicc --arena (or 'arena on' in the program's package.ludic): the escape analysis runs and a
LOCAL site's allocation raises @lp_want for that one call, so it comes from the frame's arena. Two
halves in one mmap reservation (R3D_ARENA_MB each, 256 by default), bump-allocated with a 16-byte
size header, flipped at each frame mark: a frame's scratch is good through the next frame, then its
half is started again (R3D_ARENA_CHECK=1 fills it with 0xDD first). The heap takes over when no frame
is running, off the main thread, or past the half's end; lp_free ignores an arena block and
lp_realloc copies one out. R3D_ARENA=0 turns it off at run time; the census reports each half's
high-water mark. A program that builds text, a list and a record per frame: 29998 heap blocks made
and 18002 freed without it, 8 and 8 with it and 544 bytes of scratch a frame, the same output.
A dispatch's 'new' fills the queue's kept record (E_NEW.b), so 25.2 no longer counts it and 25.3
treats its fields as kept. '@frame' is keyed by property and field: a 'run' field is a root only in
a property that marks it, and 'tick' stays a System's.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
emit_escape.ludic: every value is in a class, joined by flow edges (a let, an assignment, an argument
into its parameter, a result into the call) and store edges (a field, an element, a push). HEAP (a
parameter, a state, a global, what an unknown call hands back) flows forward; ESC (stored into
something HEAP, into a global, into an event's fields or named values, handed to an unknown callee)
flows backward, and from an ESC or HEAP target along a store. A load is its base's class. A site that
is neither ESC nor in a function reaching Mem.frame is LOCAL (Node.uns = ES_SCRATCH). ludicc
--escape-report prints each site and the totals; nothing is emitted differently yet - the arena that
allocates the LOCAL sites is next.
@alloc_ok on a generic now covers its instances (kept_push$NetFact is under kept_push's), and a
statement's @alloc_ok is carried on the node (Node.uns), so a generic's clone keeps it.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
