Stop one compute-only thread from freezing the whole VM (issue #5537) - #5631

Merged

shai-almog merged 7 commits into

gc-uncooperative-thread-5537

Aug 31, 2026

Commits on Aug 30, 2026

Stop one compute-only thread from freezing the whole VM (issue #5537)

shai-almog
and
claude
committed
8c147c0
Take no lock a frozen mutator could be holding (review)

shai-almog
and
claude
committed
cb71d94
Resolve the stack bounds before freezing, not after (review)

shai-almog
and
claude
committed
4a8ddbf
Root marking must not allocate under a freeze either (review)

shai-almog
and
claude
committed
4ded343
Hold the freeze through the drain when SATB is off; skip the gate on Windows (review)

shai-almog
and
claude
committed
4174c65

Commits on Aug 31, 2026

Drop the duplicated comment left by the SATB guard (no code change)

shai-almog
and
claude
committed
f47025f
Never freeze a thread mid minor-collection; drop the escalation when SATB is off (review)

shai-almog
and
claude
committed
25d569e