Hello, First of all, I'm not subscribed to this list, so please include my e-mail in the CC.
When using (trying to use...), kicad I managed to get consistent Xorg segmentation faults. I've filed a bug report on fedora's bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=528475. There I've included a very basic test case that works all the time. In the meantime, I've also got my hands dirty, and tried to debug Xorg using gdb. The symptom is that the function fbBltOne is called with src=0x0, so Xorg segfaults as soon as it tries to use src (in LoadBits; at fb/fbbltone.c:292). I've traced its value back to fbPushPixels, where it is created and fed to the function chain, in the macro fbGetStipDrawable (defined at fb/fb.h:720). Here pDrawable->type seems to be DRAWABLE_PIXMAP, so _pPix is simply cast from pDrawable. Then the _pPix -> devPrivate.ptr is used as "src", after a couple of castings and copying around. Now comes the weirdness: (gdb) list 239 240 fbGetStipDrawable (&pBitmap->drawable, stip, stipStride, stipBpp, stipXoff, stipYoff); 241 242 fbPushImage (pDrawable, pGC, 243 stip, stipStride, 0, 244 xOrg, yOrg, dx, dy); 245 } (gdb) next 240 fbGetStipDrawable (&pBitmap->drawable, stip, stipStride, stipBpp, stipXoff, stipYoff); (gdb) print pBitmap->drawable $6 = {type = 1 '\001', class = 0 '\000', depth = 1 '\001', bitsPerPixel = 1 '\001', id = 0, x = 0, y = 0, width = 294, height = 294, pScreen = 0x170a250, serialNumber = 13348} (gdb) print _pPix $7 = <value optimized out> (gdb) print _pPix->devPrivate Cannot access memory at address 0x30 It may be that I'm a rookie at gdb.. Can somebody help me debugging this further? Cheers, Renato Caldas _______________________________________________ xorg-devel mailing list [email protected] http://lists.x.org/mailman/listinfo/xorg-devel
