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Build # 8265076534

Build Type

push

github

Committed by Buristan

Commit Message

Check frame size limit before returning to a lower frame.

Thanks to Sergey Kaplun.

(cherry picked from commit 302366a33)

When compiling a stitched (or side) trace, there is no check for the
frame size of the current prototype during recording. Hence, when we
return (for example, after stitching) to the lower frame with a maximum
possible frame size (249), the 251 = `baseslot` (2) + `maxslot` (249)
slot for GC64 mode may be used. This leads to the corresponding assertion
failure in `rec_check_slots()`.

This patch adds the corresponding check. The `LJ_MAX_JSLOTS` and
`LJ_MAX_SLOTS` are equal by default, but their values may be manually
changed for some custom builds. Hence, the check is not enabled only for
`LJ_GC64` mode.

Sergey Kaplun:
* added the description and the test for the problem

Part of tarantool/tarantool#9595

Run Details

5660 of 6018 branches covered (94.05%)

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2 of 2 new or added lines in 1 file covered. (100.0%)

17 existing lines in 6 files now uncovered.

21596 of 23416 relevant lines covered (92.23%)

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