Don't verify during gc_enter when gc is disabled.

RGENGC_CHECK_MODE >=3 fails with an incinsistency in the old object
count during ec_finalization.

This is due to inconsistency introduced to the object graph using T_DATA
finalizers.

This is explained in commit 79df14c04b452411b9d17e26a398e491bca1a811,
which disabled gc during finalization to work around this.

```
    /* prohibit GC because force T_DATA finalizers can break an object graph consistency */
    dont_gc_on()
```

This object graph inconsistency also seems to break RGENGC_CHECK_MODE >=
3, when it attempt to verify the object age relationships during
finalization at VM shutdown (gc_enter is called during finalization).

This commit stops the internal consistency check during gc_enter only
when RGENGC_CHECK_MODE >= 3 and when gc is disabled.

This fixes `make btest` with `-DRGENGC_CHECK_MODE=3`

0 files changed, 0 insertions, 0 deletions