Re: [GCJ] Performance of GUI applications on embedded systems

["ffileppo" <ffileppo@libero.it>]

> Mark Wielaard wrote:
> > On Wed, 2008-11-05 at 09:24 +0100, ffileppo wrote:
> >> I tried your improvement but now I'm getting Segmentation Fault whenever I execute any GUI application.
> >> (Non-gui code is working fine)
> >>
> >> Do you have any idea to investigate this problem?
> >
> > Run it under GDB and post a backtrace please.
>
> For what it's worth, I very much suspect that this will be a build
> problem.  ffileppo, we also need to know what configure options you
> used.
>
> Andrew.
>


Hi,

I tried rebuilding gcj (with Andrew's improvement) on a clean system
but I'm still getting Segmentation Fault when I run GUI applications on my embedded system.

Here is configure :

Configured with: ../configure --prefix=/root/WiTP/inst-gcc --with-sysroot=/root/WiTP/f8/rootfs-f8 --disable-libssp --disable-libgomp --disable-libmudflap --enable-libgcj --disable-bootstrap --disable-multilib --disable-sjlj-exceptions --target=arm-linux-gnueabi --enable-languages=c,c++,java --with-build-time-tools=/root/WiTP/binutils-inst/arm-linux-gnueabi/bin --with-ld=/root/WiTP/binutils-inst/arm-linux-gnueabi/bin/ld --with-nm=/root/WiTP/binutils-inst/arm-linux-gnueabi/bin/nm --with-strip=/root/WiTP/binutils-inst/arm-linux-gnueabi/bin/strip --with-as=/root/WiTP/binutils-inst/arm-linux-gnueabi/bin/as --with-float=soft --enable-java-awt=gtk --x-libraries=/root/WiTP/arm-rpm/usr/lib


And here is GDB backtrace

#0  0x40b92d14 in java::lang::Object::getClass () from /lib/libgcj.so.10
#1  0x40b116f0 in javax::swing::JComponent::isPaintRoot () from /lib/libgcj.so.10
#2  0x42f9b114 in Java_gnu_java_awt_peer_gtk_FreetypeGlyphVector_getKerning (env=0x24320, obj=<value optimized out>, rightGlyph=40,
    leftGlyph=79, fnt=<value optimized out>, p=0x0)
    at ../../../../../../../libjava/classpath/native/jni/gtk-peer/gnu_java_awt_peer_gtk_FreetypeGlyphVector.c:204
#3  0x41381c30 in gnu::java::awt::peer::gtk::FreetypeGlyphVector::getKerning () from /lib/libgcj.so.10
#4  0x41383f4c in gnu::java::awt::peer::gtk::FreetypeGlyphVector::performDefaultLayout () from /lib/libgcj.so.10
#5  0x4137022c in gnu::java::awt::peer::gtk::FreetypeGlyphVector::FreetypeGlyphVector () from /lib/libgcj.so.10
#6  0x41368ac4 in gnu::java::awt::peer::gtk::GdkFontPeer::layoutGlyphVector () from /lib/libgcj.so.10
#7  0x40e977c0 in java::awt::Font::layoutGlyphVector () from /lib/libgcj.so.10
#8  0x40ef0d10 in java::awt::font::TextLayout::TextLayout () from /lib/libgcj.so.10
#9  0x41358b24 in gnu::java::awt::peer::gtk::GdkFontPeer$GdkFontMetrics::stringWidth () from /lib/libgcj.so.10
#10 0x41150c38 in javax::swing::JComponent::isPaintRoot () from /lib/libgcj.so.10
#11 0x41151704 in javax::swing::SwingUtilities::layoutCompoundLabel () from /lib/libgcj.so.10
#12 0x411c7ec0 in javax::swing::plaf::basic::BasicLabelUI::layoutCL () from /lib/libgcj.so.10
#13 0x411d2500 in javax::swing::plaf::basic::BasicLabelUI::getPreferredSize () from /lib/libgcj.so.10
#14 0x4111f6f0 in javax::swing::JComponent::getPreferredSize () from /lib/libgcj.so.10
#15 0x411bbfdc in javax::swing::plaf::basic::BasicListUI::updateLayoutState () from /lib/libgcj.so.10
#16 0x411944ec in javax::swing::plaf::basic::BasicListUI::maybeUpdateLayoutState () from /lib/libgcj.so.10
#17 0x4119c52c in javax::swing::plaf::basic::BasicListUI::installUI () from /lib/libgcj.so.10
#18 0x4111e778 in javax::swing::JComponent::setUI () from /lib/libgcj.so.10
#19 0x4111e8c0 in javax::swing::JList::setUI () from /lib/libgcj.so.10
#20 0x41143d48 in javax::swing::JList::updateUI () from /lib/libgcj.so.10
#21 0x4116f1bc in javax::swing::JList::init () from /lib/libgcj.so.10
#22 0x4116f230 in javax::swing::JList::JList () from /lib/libgcj.so.10
#23 0x00012d88 in MainPanel::MainPanel ()
#24 0x00012f80 in MainPanel::main ()
#25 0x40b7be60 in gnu::java::lang::MainThread::call_main () from /lib/libgcj.so.10
#26 0x40bfe85c in gnu::java::lang::MainThread::run () from /lib/libgcj.so.10
#27 0x40b99648 in _Jv_ThreadRun () from /lib/libgcj.so.10
#28 0x40b0d588 in _Jv_RunMain () from /lib/libgcj.so.10
#29 0x40b0d720 in _Jv_RunMain () from /lib/libgcj.so.10
#30 0x40b0d75c in JvRunMain () from /lib/libgcj.so.10
#31 0x424b5db8 in __libc_start_main () from /lib/libc.so.6
#32 0x0001255c in _start ()



I'll try to revert Andrew's patch to be sure that's the cause of segmentation fault.


Thank you,

Francesco