Robert Allan JamesandClaude Sonnet 5
4e7dcdf889
FENCE ( -- ) exposes the dict_fence_latest/dict_fence_here state FORGET already honored internally, letting callers (e.g. a future SDK capsule) raise the boundary after loading their own content -- no new VM fields, no policy logic beyond exposing existing state. Writing a direct test for it surfaced a real, severe, pre-existing bug in FORGET's relink logic, unrelated to FENCE itself and reproducible with the original boot-time fence alone: - Forgetting the single newest word incorrectly destroyed every other word back to the fence too, not just the target. - Forgetting an older word (correctly cascading to remove newer words too, per FORTH-79 semantics) crashed with SIGSEGV. Root cause: the relink code's target_prev pointer was, by construction, always inside the range the preceding loop had just freed whenever target wasn't vm->latest -- so writing through it was a use-after-free every time that branch executed. Fixed by removing the target_prev tracking and both branches entirely; vm->latest unconditionally becomes target_next (target's own captured, still-valid link) after the free loop, correct in every case. Added a FENCE test suite to dictionary_manipulation_words_test.c (Module 14) including the exact regression case (forgetting the newest word must not disturb an older one). Verified zero warnings and identical POST/dict_hash results across all three kernel architectures. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
src/test_runner/
Test harness for the hosted VM's test suite, run via
./starforth --run-tests. Organized in POST (Power-On Self Test) order:
unit tests → dictionary/word-category tests → integration/stress/
adversarial tests.
test_runner.c— test harness orchestration (loads and runs all modules in POST order).test_common.c— shared test utilities.test_contracts.c— contract-based testing infrastructure (pre/post condition assertions around word execution).
Subdirectories:
include/— public headers for this harness.modules/— per-category test files; seesrc/test_runner/modules/README.md.