Add Vst2RawChunk, a raw effGetChunk/effSetChunk bypass around JUCE's
VSTPluginInstance::usesChunks() gate, plus --loadBankChunk/--saveBankChunk/
--loadPatchChunk/--savePatchChunk CLI flags and a new test_chunk_roundtrip
regression test asserting the saved file is genuinely zlib/XML (0x78 header,
>1000 bytes), not a per-parameter fallback.
Building and using this bypass disproved an earlier documented finding: the
compiled VST2 wrapper does set effFlagsProgramChunks and usesChunks() is
genuinely true, so the previous "chunk-advertisement gap" theory in TODO.md
and tests/README.md was wrong. Corrected in both places. The real cause of
old bundled .fxp sample files having no effect remains open and is now
narrowed to a JaySynth-side XML/schema parsing question, not a host/plugin
capability mismatch.
Also adds a PluginHost-method-to-VST2-wiring-to-test coverage table in
tests/README.md, and documents the remaining "exercised but not asserted"
gaps (channel/param counts, DSP correctness) in TODO.md.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_011dhtwRLARk4eiPngcQykLJ
tools/testhost/tests/run_tests.sh dynamically exercises the tracked
hardening findings using testhost itself - no GUI, sub-second wall
time:
- oversized_blocksize (Critical #5): --blockSize 16384 under a
timeout, catching either the overflow or the deadlock the original
bug could cause.
- nrpn_out_of_range/nrpn_in_range (Critical #1): JSON scenarios
sending the 5-message MIDI NRPN CC sequence, once targeting the
max 14-bit ID (16383) and once a legitimate in-range ID (500), so
a regression that made the bounds check too aggressive would also
show up.
- patch_save_load_roundtrip / bank_save_load_roundtrip: save a
distinctive continuous parameter value, reload in a fresh process,
check it round-trips within tolerance - covers the
setCurrentProgramStateInformation no-op bug and the
patchDecodeXml/patchImportXml fixes.
- stability_sweep: loads every bundled .fxp under extras/sounds/ and
renders a held note through each, as a broad crash/NaN net.
Added --printParams to main.cpp (prints every parameter's index and
value) to make the round-trip tests possible - this was also already
a noted nice-to-have in testhost/TODO.md.
While building the oversized_blocksize test, found and fixed (on the
hardening branch, commit d713ca5) a second, previously-unknown bug:
VCF_CalcCoeff_LPF/_HPF/_BPF advance the coefficient buffer pointer
once per (sample, filter-section) pair, but the buffer was only ever
allocated for bufsize samples, not bufsize*sections - a 4th-order
filter overflowed it for any block between 4097 and 8192 samples.
Found via bisecting the crashing block size then confirming with an
ASan build; see tests/README.md's debugging-notes section for exactly
how, including the ASan symbolizer hang encountered along the way and
the workaround.
Also discovered (documented in tools/testhost/TODO.md's Investigate
section, not fixed - out of scope): JaySynth's compiled VST2 wrapper
never advertises chunk support to the host, so real .fxp/.fxb sample
files have no effect when loaded through the generic AudioProcessor
state API. The round-trip tests work around this by using testhost's
own save output as the fixture rather than an external sample file.
All 10 checks pass against the current hardening-branch build.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_011dhtwRLARk4eiPngcQykLJ
jensandClaude Sonnet 5