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  1. JDK
  2. JDK-8310656

RISC-V: __builtin___clear_cache can fail silently.

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    • b05
    • riscv

    Backports

      Description

        If __builtin___clear_cache fails (e.g. EPERM) it is unnoticed.
        That can cause the VM to crash on what seems like a perfectly fine instruction with SIGILL ILL_ILLOPC.
        If you don't know that this syscall is critical it's very hard to debug.

        In JDK 19 the VM emits the syscall itself, but never checks the return value. Same issue.

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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-8312010 RISC-V: __builtin___clear_cache can fail silently.

            • 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-8312908 RISC-V: __builtin___clear_cache can fail silently.

            • 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-8320576 RISC-V: __builtin___clear_cache can fail silently.

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

            Commit Commit openjdk/jdk17u-dev/2da7aeb2

            Commit Commit openjdk/jdk21/5f1d7627

            Commit Commit openjdk/jdk/faf1b822

            Commit Commit openjdk/riscv-port-jdk11u/d4b0021a

            Review Review openjdk/jdk17u-dev/1968

            Review Review openjdk/jdk21/90

            Review Review openjdk/jdk/14670

            Review Review openjdk/riscv-port-jdk11u/16

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                rehn Robbin Ehn
                rehn Robbin Ehn
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                  Created:
                  Updated:
                  Resolved: