Java binary, can't redirect stderr on VM crash

[Patrick Wright]

Hi Tim

Thanks for the reply.

> Is this test program ("RenderFontTest") something you could share with
> the list?  Also, what font(s) are you testing when the crash happens?

Yes, first, see
http://mail.openjdk.java.net/pipermail/2d-dev/2008-November/000561.html

for the first report, with a Swing demo app. Igor asked me to try a
simpler test without getting Swing involved. The image-based test I'll
paste at the end of the mail.


> With this information we can try the testing on other platforms and
> throw additional troubleshooting resources such as libumem on Solaris
> at the problem.

That would be great. It's painstaking work given the nature of the problem.

> Looks as if this output is coming from down inside the free() implementation
> in the libc library on the native platform.

OK

>  java -cp out/production/Samples RenderFontTest "AR PL UMing CN" >
> /tmp/err.txt 2>&1

Didn't work, but script did (altho output went to the console as
well), so I can capture the VM dump, at least.


Thanks for the help!
Patrick


Here's the render-glyph-to-image test. This fails on OpenJDK but not
Sun Java, for me. A font list (from getAllFonts()) is attached. The
other simple test, listed in the 2d-dev mailing list, fails on both,
but is higher level (Swing).

import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.IOException;

public class RenderFontTest {
    public static void main(String[] args) throws IOException {
        if (args.length == 0) {
            System.err.println("Need a font name");
            System.exit(1);
        }
        // in case "" get pulled in with argument, strip em
        String fontName = args[0];
        if (args[0].startsWith("\"")) {
            fontName = fontName.substring(1, fontName.length() - 1);
        }
        new RenderFontTest().run(fontName);
    }

    private void run(String fontName) throws IOException {
        GraphicsEnvironment lge =
GraphicsEnvironment.getLocalGraphicsEnvironment();
        GraphicsConfiguration gconf =
lge.getDefaultScreenDevice().getDefaultConfiguration();

        Font f = loadFont(fontName);
        if (f == null) {
            System.err.println("Could not load font " + fontName + ",
not in JRE font list");
            return;
        }
        System.out.println("Testing font: " + fontName + " created as
" + f.toString());
        BufferedImage bimg = gconf.createCompatibleImage(100, 100);
        Graphics g = bimg.getGraphics();
        g.setFont(f);
        g.drawString(Character.toString('\u0DDD'), 0, 0);
        g.dispose();
        System.out.println("OK");
    }

    // match exactly on font face name; constructor new Font(ffn...)
was not working?
    private Font loadFont(String fontName) {
        Font[] fonts =
GraphicsEnvironment.getLocalGraphicsEnvironment().getAllFonts();
        for (int i = 0; i < fonts.length; i++) {
            Font font = fonts[i];
            if (font.getFontName().equals(fontName)) {
                return font;
            }
        }
        return null;
    }
}
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