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  1. JDK
  2. JDK-6920293

OptimizeStringConcat causing core dumps

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    • Icon: Bug Bug
    • Resolution: Fixed
    • Icon: P3 P3
    • hs17
    • hs17, 6u18
    • hotspot
    • None
    • b10
    • sparc, itanium
    • solaris_10

        When I run tests with HS17 builds and -XX:+OptimizeStringConcat, the JVM will eventually core dump:

        Error: guarantee(cont_offset != 0,"unhandled implicit exception in compiled code")

        This happens only when -XX:+OptimizeStringConcat is enabled, so it seems different than 6914436, though of course they may have the same root cause. I have been using OptimizeStringConcat on HS17 in the latest JDK7 build but also in JDK6 builds my moving the libjvm.so

        I have attached the fastdebug output and hs_err file; core file is at ftp://javaperf.sfbay/pub/cores/core.stringconcat.gz. And yes, it's one of those bugs I can only reproduce on our big spec tests, though it reproduces quite easily so I can get more info quickly.

              never Tom Rodriguez
              soaks Scott Oaks
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