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https://issues.apache.org/jira/browse/IMPALA-5031?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16692453#comment-16692453
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ASF subversion and git services commented on IMPALA-5031:
---------------------------------------------------------
Commit 48d1d2d7421d668f8dd5142b05395e2b163f621b in impala's branch
refs/heads/master from [~jbapple]
[ https://git-wip-us.apache.org/repos/asf?p=impala.git;h=48d1d2d ]
IMPALA-5031: method calls on NULL are not UBSAN-clean
According to [expr.post] in the C++14 standard, a call to a member
function like a->b() is interpreted as (a->b)(). In other words, the
dereferencing is done separately from the call. This makes calling
member functions on nullptr undefined behavior, since the dereference
invokes undefined behavior.
Change-Id: I8b38cb1ebba02fc163534ffcc95e4ebe41cbb115
Reviewed-on: http://gerrit.cloudera.org:8080/11950
Reviewed-by: Jim Apple <[email protected]>
Tested-by: Impala Public Jenkins <[email protected]>
> UBSAN clean and method for testing UBSAN cleanliness
> ----------------------------------------------------
>
> Key: IMPALA-5031
> URL: https://issues.apache.org/jira/browse/IMPALA-5031
> Project: IMPALA
> Issue Type: Task
> Components: Backend, Infrastructure
> Affects Versions: Impala 2.9.0
> Reporter: Jim Apple
> Assignee: Jim Apple
> Priority: Minor
>
> http://releases.llvm.org/3.8.0/tools/clang/docs/UndefinedBehaviorSanitizer.html
> builds are supported after https://gerrit.cloudera.org/#/c/6186/, but
> Impala's test suite triggers many errors under UBSAN. Those errors should be
> fixed and then there should be a way to run the test suite under UBSAN and
> fail if there were any errors detected.
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