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Root cause of 'Maximum idalib worker count reached': the app bumped idle_ttl to
~never on every open, so sessions never freed and hit the default cap of 4.
- app: drop the immortal bump_idle_ttl(1e9); rely on the KeepAlive heartbeat
(120s) to keep the running session warm, and open with a moderate idle_ttl
(1800s) so the worker self-exits and frees its slot after the TUI closes.
- spawn.sh: set IDA_MCP_MAX_WORKERS (default 8) for headroom.
- doc: supervisor prunes unreachable workers before counting, so killing an idle
worker frees a slot on the next open.
(Verified separately: big/truncated decompile results propagate renames fine via
the earlier force_recompile fix.)
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Root cause: idalib workers run an idle watchdog (worker_lifecycle.py) that
self-exits after idle_ttl_sec (default 600s) of no requests -- deliberate
resource hygiene for a shared/ephemeral supervisor, wrong for an interactive
TUI. CLI-opened startup binary always gets 600s (no flag).
Fix (both verified against a 12s-TTL session):
- IDAClient.bump_idle_ttl(1e9): re-open (idempotent) re-applies TTL, no upper
cap -> effectively immortal. Primary fix, call once at startup.
- IDAClient.keepalive()/KeepAlive: background server_health heartbeat resets the
watchdog; covers adopted sessions too. Safety net.
tests/test_keepalive.py: 4/4 (heartbeat + bump both keep a short-TTL worker
alive past 2x TTL). docs updated with why + fix.
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- Program: model registry + small prefetch pool; cache invalidation hooks
- FunctionIndex: lazy pagination (advance by len, clamp page=500), filter globs,
viewport windows; full 10,092-func enumerate matches survey in ~3.1s
- DisasmModel: block-cached windowed disasm (256/block), forward+back prefetch,
cached instruction totals; deep window revisit 196ms -> 0ms (cache proven)
- Decompilation: truncation-aware, hard-failure surfaced as data (monster funcs)
- resolve(): int/hex/symbol via lookup_funcs (string-array query shape)
- tests/test_domain.py: 17/17 on both ls (~290 funcs) and libcrypto (10k+52k-insn)
- smoke_client no longer assumes 'main' exists (works on libraries)
- doc: idle_ttl worker self-exit finding ("not reachable" needs re-open)
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Measured against libcrypto.so.3 (10,092 funcs, biggest 52,120 insns):
- list_* count cap ~700, disasm max_instructions cap ~500, then SILENT
collapse to 10 (not clamped) -> must clamp client-side (use 500).
- pagination must advance by len(data); next_offset=offset+count skips data.
- disasm offset paging is O(offset): 6ms@0 -> 180ms@50k, no resumable cursor
-> domain layer must cache windows + prefetch + over-fetch.
- include_total scans whole func (~217ms on monster) -> fetch once, cache.
- decompile hard-fails on huge funcs as a soft error (code=null) -> handle.
- idb_open needs a writable path for the .i64.
tests/stress_paging.py: durable paging benchmark harness
docs/PAGING_FINDINGS.md: constraints that drive the paging layer
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