- Add the abi.instance_per_thread profile field: the archive's TUs compile
with -DSCR_THREAD_INSTANCES, and the SCR_TL qualifier in scr_runtime.h
moves every runtime unit's mutable statics into thread-local storage;
both backends emit the program TU's module globals, run-once guards, and
lazily-compiled regex literal caches thread-local to match
- ONE linked archive then serves one independent instance per embedder
thread through the unchanged entry family: a thread registers its sink
and calls the init entry, and owns its own collector, result arena,
poison flag, and program state — a trap poisons only the instance it
fired in while sibling threads' instances keep answering
- Document the contract beside the profile spec: one instance per thread,
selected implicitly by the calling thread; instance lifetime is the
thread's lifetime; the never-entered-from-two-threads rule is unchanged;
independent of and composable with abi.localize_runtime
- Immutable interned data (string literals, unit arms, template arrays,
vtables) stays shared — Darwin ASan's image-registration common
included, keeping the one-registration-per-image discipline; the
exception cell's current pointer resolves a NULL sentinel in this mode
because a thread-local address is not a constant initializer
- Add the four-thread acceptance probe (distinct per-thread workloads,
concurrent instance-local inits, per-instance collects, a trap delivered
to its own thread's sink exactly once), the composition probe pairing a
thread-instanced localized archive with a second different-prefix
localized archive, an explicit ASan rerun beside the suite-flavor
sanitized builds, and profile-shape coverage; schedule the new lane
contracts beside M1/M2
- Non-opted builds are byte-for-byte unchanged: the qualifier expands to
nothing outside -DSCR_LIB -DSCR_THREAD_INSTANCES (verified object-level
over every touched runtime TU in both default and library flavors)
* feat: support multi-instance library mode via runtime symbol localization
- Add the abi.localize_runtime profile field: the archive build combines the
program object with exactly the runtime/vendor members it reaches and
demotes every external definition except the profile-declared symbols to a
local symbol (darwin: one ld -r pass with -exported_symbols_list; linux:
ld -r then objcopy --keep-global-symbols)
- N archives built under pairwise-distinct prefixes now link into one process
with no symbol collisions and no shared mutable runtime state: each
instance owns a private copy of the allocator, collector, result arena, and
panic sink, so sinks register per instance and a trap poisons only the
instance it fired in
- Document the embedder contract beside the profile spec: one thread per
instance (an instance is never entered from two threads), and values cross
instances only through the embedder's own byte/record marshalling
- Refuse cross-target localized builds with SC3002 (the step runs the host
toolchain's ld/objcopy over host-format objects); absent or false keeps the
classic single-archive artifact byte-for-byte
- Add the two-instance acceptance probe (two archives, two embedder threads,
independent collects, a trap delivered to its own sink exactly once while
the other instance keeps answering) plus symbol-exactness, profile-shape,
and target-posture suites, and schedule the artifact contracts on the gate
host
* fix: tighten runtime localization validation
* fix: harden localized library publication
* Restore sandbox test performance
- Re-enable secure native compiler caching for repo-local test artifacts.
- Isolate strict cache coverage while keeping it off the sandbox critical path.
* fix: respect sandbox test runtime limits
- Run host artifact and ASan contracts on supported platforms with a Sandbox fallback.
- Clear image-seeded workspace files before extracting the dirty worktree.
- Pin current Linux artifact size classes and regression coverage.
- Retain representative Darwin kqueue coverage in the default gate.
- Schedule native runtime tests by host and make Linux clang invocations portable.
- Resolve canonical OCI manifest digests for direct and indexed images.
- Shard portable coverage across 16 sandboxes while retaining focused Darwin contracts.
- Run invariant suites once and keep differential and sanitizer-sensitive coverage in both lanes.
- Harden sandbox transport, exit-status parsing, and Linux runtime test portability.
- Add a custom Node 24 test image with tenant-neutral VCR configuration.
- Shard differential suites across disposable Sandboxes while preserving host-specific coverage.
- Load local agent credentials safely and document the validation workflow.
Chris Tate