----- Original Message ----- > On Sun, 16 Jan 2011 16:29:45 -0500, Benoit Jacob <bja...@mozilla.com> > wrote: > > Hi List, > > > > I realize that you may well not have time to care about WebGL [1] or > > Firefox. In that case, I'm still writing because there's a new test > > suite, namely the WebGL conformance test suite, that may be of > > interest > > to help find and fix bugs in OpenGL implementations. > > > > The goal of this email is to discuss steps towards whitelisting Xorg > > OpenGL drivers for WebGL rendering, and more generally for all > > OpenGL-based features, in Firefox. Although I'm only directly > > concerned > > with Firefox, this really applies equally well to all browsers > > implementing WebGL. > > > > OpenGL-based features are disabled by default in Firefox 4 on X11 > > because of OpenGL bugs we've hit [2], and currently only the NVIDIA > > proprietary driver is whitelisted [3]. > > We're definitely interested in the intel driver being whitelisted (or, > more accurately, in convincing you to not blacklist on linux at all
Unfortunately, we really can't do that. See for example https://bugzilla.mozilla.org/show_bug.cgi?id=616416 That's a mainstream news site that uses a JS library ("modernizr") that creates a WebGL context just "to check for html5 features", the problem is that it crashes certain open source drivers. > so linux developers can actually see bugs so they can get fixed). Well, people would seldom report bugs directly to you anyway. I still believe that the present email thread is far more effective to fix stuff than that :-) > So far, > though, I've had an awful time trying to debug webgl issues under > firefox, so I haven't spent much time on it. > > For example, right now when I hit that page with: > > MOZ_GLX_IGNORE_BLACKLIST=1 ./firefox -g -P -no-remote > > on Mesa 7.10 or master, with ff 4.0b9 or the current nightly of > 4.0b10pre, I get a segfault almost immediately: Weird; perhaps there's something wrong with our builds. Could you then run again firefox with the same profile, and then go to about:crashes. You should see 1 link there per crash. It gives you a stack trace with symbols (using our symbol server). > just before that is a GL user error from firefox calling a GL function > with no context. Maybe if you could reproduce with MOZ_GL_DEBUG_VERBOSE=1 in a debug build, http://ftp.mozilla.org/pub/mozilla.org/firefox/tinderbox-builds/mozilla-central-linux-debug/ http://ftp.mozilla.org/pub/mozilla.org/firefox/tinderbox-builds/mozilla-central-linux64-debug/ that may give us a clue, from the terminal output. > That may or may not be related, but without debug > symbols it's hard to tell: > > #0 NoOpGeneric () at glapi_nop.c:120 > #1 0xb784ef07 in ?? () from > /home/anholt/firefox4.0b10pre/firefox/libxul.so > Backtrace stopped: previous frame inner to this frame (corrupt stack?) > > I tried running under valgrind, but on (eventually) getting to a page, > valgrind died complaining that it can't handle a general clone() call. Weird; CC'ing Julian. > > I've been getting bug reports from VMware doing regression testing of > our driver for webgl, and I think our QA is working on getting it into > their automated system, so if we just can work out a debug environment > we should be able to get things in shape to get whitelisted at least. > Are there really no nightlies/betas with debug symbols? I'd really > rather not build firefox on my own if I can avoid it. The nightlies and betas have debug symbols on the server https://developer.mozilla.org/en/Using_the_Mozilla_symbol_server Apparently it's possible to download them and use them from GDB, as explained on that page, I've just never used it. https://developer.mozilla.org/en/Using_the_Mozilla_symbol_server#Downloading_symbols_on_Linux_.2f_Mac_OS_X If you are looking for a way to automatically run these tests, you may be interested to know that we've already integrated the WebGL test suite as a 'mochikit' (one of our testing frameworks) test. The part that's specific to mochikit is negligible (just the ok() calls and SimpleTest): http://hg.mozilla.org/mozilla-central/file/62157abe57bf/content/canvas/test/webgl/test_webgl_conformance_test_suite.html Cheers, Benoit _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/mesa-dev
