← WebKit — 2026-W38
e57b0d1670910d44edac8f6ad5aa267bdaa10b48 [JSC] Store DFG OSR exits as a byte stream
not a security fix
confidence 0.1
signal score 11.3
Source/JavaScriptCore/bytecode
Classified as not security-relevant.
Triage note: Refactors DFG OSRExit storage from FixedVector<OSRExit> into a compressed byte-stream (new OSRExitStream with LEB128 encode/decode, exitStubs/exitJumpTable split, removal of m_count). It threads new operation signatures (operationMaterializeOSRExitSideState/TriggerReoptimizationNow take InlineCallFrame+bytecodeIndex instead of OSRExitBase*). No bug is identified or fixed; it is a memory-footprint refactor of JIT metadata.
This commit was flagged by the signal scorer and reviewed by AI (not a human). It is listed only so the triage is auditable; there is no root-cause analysis because this is not a vulnerability fix.
Triage note: Refactors DFG OSRExit storage from FixedVector<OSRExit> into a compressed byte-stream (new OSRExitStream with LEB128 encode/decode, exitStubs/exitJumpTable split, removal of m_count). It threads new operation signatures (operationMaterializeOSRExitSideState/TriggerReoptimizationNow take InlineCallFrame+bytecodeIndex instead of OSRExitBase*). No bug is identified or fixed; it is a memory-footprint refactor of JIT metadata.
This commit was flagged by the signal scorer and reviewed by AI (not a human). It is listed only so the triage is auditable; there is no root-cause analysis because this is not a vulnerability fix.
Structural signals: smartptr_member_added (+6.47), security_assert (+4.87), null_guard (+1.95), msg_noise (-2.5), area:Source/JavaScriptCore/bytecode (+2.5), large_churn (-2.0)
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