Continues backporting onto this branch rather than moving to feat/rbengine,
keeping the known-good race performance while recovering fixes that landed
after the branch point.
pc=0 cluster (the mid-race 'crash' was a silent top-level GUEST_EXIT):
- 6ead85c9 honor IRQ redirects at compiled leaders + pc0 escape journal. THE
root cause: every emitted block-leader IRQ check overwrote whatever resume
PC the exception epilogue published, so a guest RFE to a non-EPC target
(card-ISR handlers, SetCustomExitFromException, thread switch) lost its
continuation and a later jr through a null pointer surfaced as PC=0.
Its own message names this title and the static bake.
- 21a8457e the IRQ-redirect guard must CONSUME the benign same-site resume.
- (2edce1b6 and the async-RFE latch hunks landed in the previous commit.)
- cpu_state.h pc0-journal declarations, which the cherry-picks reference.
Overlay/autocompile correctness:
- d31953fe missing cull-widen ABI symbols; PGXP hooks swallowed by an #endif.
- 45f9d0f8 pin the overlay flavor through the spawn env — the same
--flavor-defaults-to-0 trap that silently fills a cache this PGXP build
cannot load.
- 8b323ffe coverage_vault 8 MB dev-RAM aware bounds.
Deliberately NOT taken: 249057f9 / ada331a4 (exact-sign NCLIP + GTE clamp
rescue) — broadens PGXP arming and adds a per-vertex RTPS push, and is the
leading suspect for the race-FPS regression this branch exists to avoid; and
3b698682 / 95a56e23 (image-edge tail-transfer), which 4532ad2f later gated to
CPS-only — this game emits non-CPS, where the legacy behaviour this branch
already has is the correct one.
Emitters rebuilt and game+BIOS regenerated (56 shards changed). Verified: 8 MB
mod plan applies, 60 Hz NTSC at 1.00x, no PC=0 exit.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01UoSNLFj7kvarYHEV9PCZpV
merge_cache used a flat listdir() against a nested cache
(<compiler>/<arch-abi>/cg<N>_<hash>/) so it matched nothing — the vault's
DLL mirror has been empty since the tool shipped. Walk the tree and keep
relative paths: the same content-keyed filename exists under different cg
dirs with different compiled bytes, so flattening would mix emitter
generations. stats() walks recursively to match.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Overlay coverage (overlay_captures.json + the gcc-compiled cache DLLs) normally
lives only in gitignored build dirs, so a `cmake` clean or fresh worktree wipes
it (re-derivable only by replaying those areas). coverage_vault.py maintains one
additive vault OUTSIDE any build dir: `merge` unions captures by variant
(load_addr + bytes hash; same variant unions executed/entry PCs, distinct
variants all kept) and copies content-keyed cache DLLs (copy-if-absent/newer).
Wired into Tomba's overlay_autocompile_cmd so every compile backs up additively;
also runnable by hand to consolidate scattered build dirs. The vault holds
game-derived bytes, so it stays private/gitignored (this script does not).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Alex Vanderveen