ludic/examples/lang/alloc_fence_leak.ludic
Orkuncakilkaya 691964877b fence (25.1c): the census reads the heap outside Ludic's blocks; blocks counted at malloc's own size
The census's native line is malloc's live bytes over every zone since judging began less what
Ludic's tracked blocks kept - the libraries' and drivers' growth, read before the census file is
opened. A tracked block counts malloc_size(), not the size asked for, so kept is what the heap pays
and the residual carries no rounding. @malloc_zone_statistics is declared once, by the fence or by
Os.heap_bytes.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-09-28 15:38:13 +03:00

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# alloc_fence_leak.ludic - frame 50 keeps one record in a list that outlives it. The fence fails
# the run there (exit 86) and names this file's `new Box` line; under R3D_ALLOC_FENCE=count it
# runs on and prints `kept 80 bad 1` (the record and the list's growth, at malloc's own sizes, in one frame).
program AllocFenceLeak {
property Box { a: int = 0, b: int = 0 }
entry {
var held = new []Box
Mem.play()
Mem.settled()
for f in 0 .. 100 {
if f == 50 { push(held, new Box { a: f }) }
Mem.frame()
}
let kept_now = Mem.kept()
print(`kept {kept_now} bad {Mem.bad_frames()}`)
}
}