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  1. JDK
  2. JDK-8241556

Memory leak if -XX:CompileCommand is set

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    • 9
    • b18
    • Not verified

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      Description

        There are two memory leaks on the DirectiveSet::DisableIntrinsicOption char array.

        (1) DirectiveSet::clone() overwrites this->DisableIntrinsicOption without freeing the old array.
        (2) If DisableIntrinsic is set inside -XX:CompileCommand, then compilecommand_compatibility_init() overwrites set->DisableIntrinsicOption without freeing the old array.

        The memory leak only exhibits if any value for -XX:CompileCommand is set on command line. The first leak easily causes 200MB-500MB memory leak per instance in production servers.
        Note that this leak happens even if -XX:DisableIntrinsic is not set. Because DirectiveSet::canonicalize_disableintrinsic() allocates one-byte empty string "\0" that still gets leaked.

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            backported by

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8242503 Memory leak if -XX:CompileCommand is set

            • P2 - Crashes, loss of data, severe memory leak.
            • Resolved

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8246686 Memory leak if -XX:CompileCommand is set

            • P2 - Crashes, loss of data, severe memory leak.
            • Resolved

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8243385 Memory leak if -XX:CompileCommand is set

            • P2 - Crashes, loss of data, severe memory leak.
            • Closed
            relates to

            Enhancement - null JDK-8241557 Avoid cloning DirectiveSet at runtime if -XX:CompileCommand is set

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • Open

            JEP - Java Enhancement Proposal JDK-8046155 JEP 165: Compiler Control

            • P2 - Crashes, loss of data, severe memory leak.
            • Closed

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                manc Man Cao
                manc Man Cao
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                  Updated:
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