kmiller68
JSC contributor
Summary
Primarily JSC: Wasm runtime and test infrastructure, GC/heap plumbing, and the migration of structured cloning into the engine, with a secondary line of build and toolchain work (CMake presets, PGO/LTO across WTF and bmalloc, `preserve_most` on fastMalloc paths). The memory-safety-relevant fixes cluster tightly around object lifetime and GC barrier correctness — a missing write barrier in `Array.unshift`, Heap protection for swapped `JSString` Impls under `GCOwnedDataScope`, `ArrayBuffer` `m_locked` folded into `pinCount`, and `DeferredWorkTimer` vending Weak references to Tickets — alongside one type-check filtering bug in `RegExpStringIterator`. Systematic-variant candidate: other builtin fast paths that mutate butterflies without a barrier, and raw handle/ticket ownership in the rest of the deferred-work machinery; the structured-cloning code newly moved into JSC is fresh surface with no fixes against it yet.
Components
Security Fix History
Hardening Commits
- No hardening commits recorded
Recent Commits
- 2026-08-07 Add missing writeBarrier to Array.unshift 2026-W31
- 2026-08-03 Add JSTests README.md / agent imports
- 2026-08-01 [Wasm] Optimize JITCallee publication
- 2026-07-30 Add preserve_most to most fastMalloc APIs on ARM64
- 2026-07-28 [Wasm] Remove stale spec tests
- 2026-07-18 [JSC] Run WPT Wasm tests in run-jsc-stress-tests' wasm.yaml
- 2026-07-16 [CMake] 317298@main didn't add ctx.c and pal.c to CMakeLists.txt
- 2026-07-16 JSC feature flags should be driven by UnifiedWebPreferences.yaml
- 2026-07-14 [CMake] Add mac-performance preset with PGO/LTO support
- 2026-07-12 Move object structured cloning code into JSC
- 2026-07-12 RegExpStringIterator next can't use SpecObjectOther type check filtering 2026-W28
- 2026-07-09 [Wasm] Import Wasm WPT tests
- 2026-07-07 No names in Error's stacktrace for instantiateStreaming modules
- 2026-07-07 [JSC] Push ArrayBuffer m_locked into the pinCount
- 2026-07-03 [JSC] DeferredWorkTimer should vend Weak references to Tickets ·