[jira] [Resolved] (IMPALA-12306) Make codegen cache tests with symbol emitter more robust

["Daniel Becker (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IMPALA-12306?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Daniel Becker resolved IMPALA-12306.
------------------------------------
    Resolution: Fixed

> Make codegen cache tests with symbol emitter more robust
> --------------------------------------------------------
>
>                 Key: IMPALA-12306
>                 URL: https://issues.apache.org/jira/browse/IMPALA-12306
>             Project: IMPALA
>          Issue Type: Bug
>            Reporter: Daniel Becker
>            Assignee: Daniel Becker
>            Priority: Major
>
> The tests TestCodegenCache.{test_codegen_cache_with_asm_module_dir,test_codegen_cache_with_perf_map} introduced by [IMPALA-12260|http://issues.apache.org/jira/browse/IMPALA-12260] were added to ensure we don't crash because of a use-after-free. However, use-after-free is undefined behaviour and does not guarantee a crash, so the tests don't necessarily crash without the fix of [IMPALA-12260|http://issues.apache.org/jira/browse/IMPALA-12260]. We should find a way to make these tests detect the conditions that lead to this use-after-free.



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