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  1. JDK
  2. JDK-8335334

Stress mode to randomly execute unstable if traps

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Details

    • Enhancement
    • Resolution: Fixed
    • P4
    • 24
    • 11, 17, 21, 24
    • hotspot
    • b17

    Description

      Unstable if traps are supposed to be taken rarely. Below patch introduces a 'StressUnstableIfTraps' flag that forces unstable if traps to be taken randomly and thus potentially triggering intermittent bugs. It works by adding another if before the unstable if that checks a "random" condition at runtime and then either takes the trap or executes the original, unstable if:
      https://github.com/openjdk/jdk/compare/master...TobiHartmann:jdk:JDK-8335334

      The stress option also has the nice side effect of triggering re-compilation of methods that would otherwise not be re-compiled (see JDK-8335843).

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        Issue Links

          relates to

          Enhancement - null JDK-8340302 Add -XX:+StressUnstableIfTraps to CTW

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

          Enhancement - null JDK-8333956 C2: initialize stress seed earlier

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

          Bug - A problem which impairs or prevents the functions of the product. JDK-8335977 Deoptimization fails with assert "object should be reallocated already"

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

          Bug - A problem which impairs or prevents the functions of the product. JDK-8320308 C2 compilation crashes in LibraryCallKit::inline_unsafe_access

          • P3 - Major loss of function.
          • In Progress

          Bug - A problem which impairs or prevents the functions of the product. JDK-8335843 C2 hits assert(_print_inlining_stream->size() > 0) failed: missing inlining msg

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

          Bug - A problem which impairs or prevents the functions of the product. JDK-8335983 Various NullPointerExceptions with -XX:+StressUnstableIfTraps

          • P3 - Major loss of function.
          • Closed
          links to

          Commit Commit(master) openjdk/jdk/63e611cd

          Review Review(master) openjdk/jdk/21037

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              thartmann Tobias Hartmann
              thartmann Tobias Hartmann
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              Dates

                Created:
                Updated:
                Resolved: