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  1. JDK
  2. JDK-8239819

XToolkit: Misread of screen information memory

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    • b19
    • generic
    • linux

    Backports

      Description

        The XAWT for some native structures uses special java wrappers. These wrappers have to be created on top of the native pointer and provide access to the native fields directly w/o JNI methods.

        We have incorrect usage of such wrapper in the XToolkit class:
        Toolkit creates AwtScreenData wrapper on top of the XToolkit.getDefaultScreenData()
        https://hg.openjdk.java.net/jdk/jdk/file/321b6fbe6815/src/java.desktop/unix/classes/sun/awt/X11/XToolkit.java#l344

        But unfortunately, this native method returns the wrong pointer to getDefaultConfig():
        https://hg.openjdk.java.net/jdk/jdk/file/321b6fbe6815/src/java.desktop/unix/native/libawt_xawt/xawt/XToolkit.c#l134

        getScreenData() should be used instead of getDefaultConfig() since native data for default configuration is bigger than screen data we most of the time read some "random" information about visual info.

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            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-8245217 XToolkit: Misread of screen information memory

            • 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-8246815 XToolkit: Misread of screen information memory

            • 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-8247228 XToolkit: Misread of screen information memory

            • 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-8277844 XToolkit: Misread of screen information memory

            • 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-8277935 XToolkit: Misread of screen information memory

            • 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-8251840 Java_sun_awt_X11_XToolkit_getDefaultScreenData should not be in make/mapfiles/libawt_xawt/mapfile-vers

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

            Enhancement - null JDK-8076313 GraphicsEnvironment does not detect changes in count of monitors on Linux OS

            • P3 - Major loss of function.
            • Resolved
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                serb Sergey Bylokhov
                serb Sergey Bylokhov
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