Make a bare interpreted PC explainable from the session-long per_pc snapshot
alone. DirtyRamPcEntry gains occ_crc / occ_ok (the static overlay variant whose
code ranges span the PC, via a per-PC scan of the static-match cache, and
whether it validated at that moment) and last_ext_ra (gpr[31] at the most
recent external entry, i.e. the caller that reached this interior). Both are
stamped only on external entries -- arrivals from native dispatch, not interp
block chaining -- and emitted per row in dirty_ram_stats.per_pc as occ_crc,
occ_ok and ext_ra.
Reading the pair: occ_ok=1 is an interior gap inside live native code (an
alias seed fixes it); occ_ok=0 with a CRC means the spanning piece is resident
but CRC-missing, so it was compiled from another section's bytes or rewritten
at run time and no seed helps; 0 means nothing compiled spans the PC.
psx_overlay_resident_crc_at() records each static-match cache entry's code
span (lo_min/hi_max) so the scan is a range test; DLL-path titles fall back to
the loader's last residency hash. The debug-server reply buffer grows 32 -> 64
KiB for the wider rows; the tail reserve still cuts between rows.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Kevin
6e760748c2