rts/sm/GCAux.c · b0d6bf2a34d5e2e0cfb2410f58e768935d527be0 · Alex Dudarenko / GHC

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5 years ago

b0d6bf2a

rts: Reset STATIC_LINK field of reverted CAFs · b0d6bf2a

Ben Gamari authored 5 years ago and

Marge Bot committed 5 years ago

When we revert a CAF we must reset the STATIC_LINK field lest the GC
might ignore the CAF (e.g. as it carries the STATIC_FLAG_LIST flag) and
will consequently overlook references to object code that we are trying
to unload. This would result in the reachable object code being
unloaded. See Note [CAF lists] and Note [STATIC_LINK fields].

This fixes #16842.

Idea-due-to: Phuong Trinh <lolotp@fb.com>

b0d6bf2a

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rts: Reset STATIC_LINK field of reverted CAFs

Ben Gamari authored 5 years ago and

Marge Bot committed 5 years ago

When we revert a CAF we must reset the STATIC_LINK field lest the GC
might ignore the CAF (e.g. as it carries the STATIC_FLAG_LIST flag) and
will consequently overlook references to object code that we are trying
to unload. This would result in the reachable object code being
unloaded. See Note [CAF lists] and Note [STATIC_LINK fields].

This fixes #16842.

Idea-due-to: Phuong Trinh <lolotp@fb.com>

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