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  1. JDK
  2. JDK-8184309

Buld warnings from GCC 7.1 on Fedora 26

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    • Bug
    • Resolution: Fixed
    • P4
    • 10
    • 9, 10
    • hotspot
    • None
    • b21

    Backports

      Description

        http://mail.openjdk.java.net/pipermail/hotspot-dev/2017-July/027431.html

        I tried to build jdk10-hs on Fedora 26 with gcc-7.1.1-3.fc26.x86_64,
        then I encountered some build warnings.


        details:

        1:
        /home/ysuenaga/OpenJDK/jdk10-hs/hotspot/src/share/vm/code/dependencies.cpp:
        In static member function 'static void
        Dependencies::write_dependency_to(xmlStream*, Dependencies::DepType,
        GrowableArray<Dependencies::DepArgument>*, Klass*)':
        /home/ysuenaga/OpenJDK/jdk10-hs/hotspot/src/share/vm/code/dependencies.cpp:714:6:
        warning: '%d' directive writing between 1 and 10 bytes into a region
        of size 9 [-Wformat-overflow=]
         void Dependencies::write_dependency_to(xmlStream* xtty,
              ^~~~~~~~~~~~
        /home/ysuenaga/OpenJDK/jdk10-hs/hotspot/src/share/vm/code/dependencies.cpp:714:6:
        note: directive argument in the range [0, 2147483647]
        /home/ysuenaga/OpenJDK/jdk10-hs/hotspot/src/share/vm/code/dependencies.cpp:745:27:
        note: 'sprintf' output between 3 and 12 bytes into a destination of
        size 10
               char xn[10]; sprintf(xn, "x%d", j);
                            ~~~~~~~^~~~~~~~~~~~~~

        2:
        /home/ysuenaga/OpenJDK/jdk10-hs/hotspot/src/share/vm/logging/logFileOutput.cpp:
        In static member function 'static void
        LogFileOutput::set_file_name_parameters(jlong)':
        /home/ysuenaga/OpenJDK/jdk10-hs/hotspot/src/share/vm/logging/logFileOutput.cpp:61:99:
        warning: format not a string literal, format string not checked
        [-Wformat-nonliteral]
           res = (int)strftime(_vm_start_time_str, sizeof(_vm_start_time_str),
        TimestampFormat, &local_time);

                                    ^

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                ysuenaga Yasumasa Suenaga
                ysuenaga Yasumasa Suenaga
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                  Created:
                  Updated:
                  Resolved: