Adhemerval Zanella 9835632cf4 malloc: preserve errno on mcheck hooks [BZ #17924]
Similar to the fix 69fda43b8d, save and restore errno for the hook
functions used for MALLOC_CHECK_=3.

It fixes the malloc/tst-free-errno-mcheck regression.

Checked on x86_64-linux-gnu.
2020-12-30 10:37:58 -03:00
..
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