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  1. JDK
  2. JDK-8263718

unused-result warning happens at os_linux.cpp

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    • b19
    • linux

    Backports

      Description

        I tried to build OpenJDK with g++-10.2.1_pre1-r3 on Alpine Linux 3.13.2, but I saw following warning:

        /home/jdk/github-forked/jdk/src/hotspot/os/linux/os_linux.cpp:668:9: error: ignoring return value of 'void* __builtin_alloca(long unsigned int)' declared with attribute 'warn_unused_result' [-Werror=unused-result]
          668 | alloca(((pid ^ counter++) & 7) * 128);
              | ^
        cc1plus: all warnings being treated as errors

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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-8285694 unused-result warning happens at os_linux.cpp

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • 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-8285996 unused-result warning happens at os_linux.cpp

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

            Bug - A problem which impairs or prevents the functions of the product. JDK-8267908 linux: thread_native_entry can scribble on stack frame

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

            Commit Commit openjdk/jdk11u-dev/987f7af5

            Commit Commit openjdk/jdk/f1d4ae6c

            Review Review openjdk/jdk11u-dev/1039

            Review Review openjdk/jdk/3042

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                ysuenaga Yasumasa Suenaga
                ysuenaga Yasumasa Suenaga
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                  Updated:
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