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  1. MariaDB Server
  2. MDEV-20277

Disable -fno-strict-aliasing

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    Description

      -fno-strict-aliasing was added in https://github.com/mariadb/server/commit/c192be206ae36398804b473f7b0e4ee4431b71da

      Basically it removes some optimizations: https://godbolt.org/z/dzgsVJ

      Violating aliasing rules is UB: https://blog.regehr.org/archives/1520

      Some cases can be found with UBSAN's check -fsanitize=alignment Something can be caught by compiler itself: https://jira.mariadb.org/browse/MDEV-19386

      So instead of violating C/C++ ISO standards and having less optimizations it's better to honour type system an have more optimizations.

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          Task - A task that needs to be done. MDEV-20454 Disable -fno-strict-aliasing for InnoDB

          • Major - Major loss of function.
          • Open
          relates to

          Bug - A problem which impairs or prevents the functions of the product. MDEV-21981 Replace arithmetic + with bitwise OR when possible

          • Major - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MDEV-19386 Broken strict-aliasing rules in /storage/maria/ma_recovery.c prevents from bulding

          • Major - Major loss of function.
          • Open

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              serg Sergei Golubchik
              kevg Eugene Kosov (Inactive)
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                Updated:

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