32845 2009-12-21 18:43:34 -0800 [Chromium] WebGL crashes intermittently on Linux 2009-12-29 15:57:57 -0800 1 1 1 Unclassified WebKit WebGL 528+ (Nightly build) PC Linux RESOLVED FIXED P2 Normal --- 32890 1 kbr kbr agl brettw cmarrin commit-queue dglazkov eric evan fishd oliver petersont rlp webkit.review.bot oldest_to_newest 174152 0 kbr 2009-12-21 18:43:34 -0800 Testing of the WebGL demos at http://khronos.org/webgl/wiki/Demo_Repository with Chromium on Linux results in intermittent crashes and displays of the "Aw, snap!" page. 174158 1 45362 kbr 2009-12-21 19:37:04 -0800 Created attachment 45362 Patch The dlclose'ing of libGL.so.1 and dlopen'ing of it each time a GraphicsContext3D was created was occasionally causing it to be re-mapped at a different base address. Since GLEW is not re-initialized every time, primarily for performance reasons, its cached function pointers were pointing to garbage. Stopped closing and re-opening libGL.so.1 each time; now it is loaded lazily, when the first 3D context is created. Also reused the X display connection since the GLX routines' correctness might hinge upon it not resulting in a change of GL implementation. 174159 2 webkit.review.bot 2009-12-21 19:41:36 -0800 style-queue ran check-webkit-style on attachment 45362 without any errors. 174173 3 eric 2009-12-21 21:39:51 -0800 Commentary from one of the linux folks would make this review easier. :) 174308 4 agl 2009-12-22 10:56:24 -0800 LGTM. I didn't know that WebGL was even supposed to work on Linux, nor how it's getting a connection to the X server. So the patch looks fine, but if it actually runs then there's something terribly wrong with our sandbox. 174314 5 kbr 2009-12-22 11:14:41 -0800 (In reply to comment #4) > LGTM. I didn't know that WebGL was even supposed to work on Linux, nor how it's > getting a connection to the X server. > > So the patch looks fine, but if it actually runs then there's something > terribly wrong with our sandbox. Thanks for your review. WebGL does work in Chromium on Linux and its other supported platforms (see http://khronos.org/webgl/wiki/Getting_a_WebGL_Implementation), but yes, it currently requires disabling the sandbox which is very undesirable. We're working to remove this requirement. Can you r+ and cq+ the patch? 174339 6 evan 2009-12-22 12:55:04 -0800 Did you consider making a class out of all the statics and then having a static instance of that class? (It might also make the diff smaller.) 174343 7 agl 2009-12-22 13:01:16 -0800 (Note: I am not a WebKit reviewer, so I cannot r+ your patch.) 174347 8 kbr 2009-12-22 13:07:47 -0800 (In reply to comment #6) > Did you consider making a class out of all the statics and then having a static > instance of that class? (It might also make the diff smaller.) I think that would end up being more complicated. Note that all of the code in this file is essentially temporary until we move the 3D calls into Chromium's upcoming GPU process, so I didn't want to do extensive refactorings. 174350 9 kbr 2009-12-22 13:09:00 -0800 (In reply to comment #7) > (Note: I am not a WebKit reviewer, so I cannot r+ your patch.) No problem. How can I get this committed? A co-worker needs to do work in the same portions of this file, so I would really like to get it checked in now so we don't collide. 174352 10 eric 2009-12-22 13:09:51 -0800 I'll take another look. 174358 11 eric 2009-12-22 13:20:09 -0800 Looking again, I agree with Evan, this would probably all be cleaner held behind one static pointer instead of adding a whole bunch of static pointers (with unclear lifetimes) to the main class. Putting them all in one place leaves them as m_ vars and makes their lifetime clear. You could even make them a struct instead if that would be cleaner. Then the calls become: s_libGL->glXChooseFBConfig() Can you explain more about how this is temporary? If we're about to delete this code, do we need to fix it? 174366 12 kbr 2009-12-22 13:40:53 -0800 (In reply to comment #11) > Looking again, I agree with Evan, this would probably all be cleaner held > behind one static pointer instead of adding a whole bunch of static pointers > (with unclear lifetimes) to the main class. Putting them all in one place > leaves them as m_ vars and makes their lifetime clear. You could even make > them a struct instead if that would be cleaner. Then the calls become: > s_libGL->glXChooseFBConfig() OK, I'll make these changes and upload a new patch. > Can you explain more about how this is temporary? If we're about to delete > this code, do we need to fix it? We anticipate moving these calls out of the renderer process next quarter. In the interim we must fix the issue as the crashes are very noticeable and poor behavior. 174392 13 45403 kbr 2009-12-22 14:19:00 -0800 Created attachment 45403 Revised patch Factored new statics into a separate GLConnection class, of which there is a static instance. 174395 14 webkit.review.bot 2009-12-22 14:23:17 -0800 Attachment 45403 did not pass style-queue: Failed to run "WebKitTools/Scripts/check-webkit-style" exit_code: 1 WebKit/chromium/src/GraphicsContext3D.cpp:201: This { should be at the end of the previous line [whitespace/braces] [4] WebKit/chromium/src/GraphicsContext3D.cpp:212: render_type is incorrectly named. Don't use underscores in your identifier names. [readability/naming] [4] WebKit/chromium/src/GraphicsContext3D.cpp:212: share_list is incorrectly named. Don't use underscores in your identifier names. [readability/naming] [4] Total errors found: 3 174402 15 45405 kbr 2009-12-22 14:30:50 -0800 Created attachment 45405 Revised patch Fixed errors reported by style-queue. 174407 16 45405 eric 2009-12-22 14:35:08 -0800 Comment on attachment 45405 Revised patch You beat me! Now my comments are probably mostly obsolete: A few naming issues. Some of which the stylebot caught. We generally try to encouage full names like "display" instead of "dpy" It's unclear to me if s_initializedGLEW is still needed or if a s_gl check would be enough now? I think some folks use sizeof(libnames[0]) in this case: 319 for (int i = 0; i < sizeof(libNames) / sizeof(const char*); i++) Sadly we don't have a template function for that, ojan recently filed a bug about htat. I think we should fix the style-bot errors, but otherwise this is ready to land. I can't remember if you're a committer yet or not. 174409 17 kbr 2009-12-22 14:39:21 -0800 (In reply to comment #16) > (From update of attachment 45405 [details]) > You beat me! Now my comments are probably mostly obsolete: > > A few naming issues. Some of which the stylebot caught. > > We generally try to encouage full names like "display" instead of "dpy" I just copied these names out of the GLX headers. > It's unclear to me if s_initializedGLEW is still needed or if a s_gl check > would be enough now? s_initializedGLEW is still needed on all platforms. > I think some folks use sizeof(libnames[0]) in this case: > 319 for (int i = 0; i < sizeof(libNames) / sizeof(const char*); i++) > Sadly we don't have a template function for that, ojan recently filed a bug > about htat. Thanks for the suggestion. I'll certainly keep this in mind and if you want me to change it here now I will. > I think we should fix the style-bot errors, but otherwise this is ready to > land. I can't remember if you're a committer yet or not. Style fixes done as you've seen. I'm not a committer yet. 174410 18 45405 eric 2009-12-22 14:41:00 -0800 Comment on attachment 45405 Revised patch Looks plenty good enough for now. 174414 19 45405 commit-queue 2009-12-22 14:48:18 -0800 Comment on attachment 45405 Revised patch Rejecting patch 45405 from commit-queue. Failed to run "['WebKitTools/Scripts/run-webkit-tests', '--no-launch-safari', '--exit-after-n-failures=1', '--quiet']" exit_code: 1 Last 500 characters of output: outTests Testing 11820 test cases. http/tests/loading/bad-server-subframe.html -> timed out Sampling process 7092 for 10 seconds with 10 milliseconds of run time between samples Sampling completed, processing symbols... Sample analysis of process 7092 written to file /Users/eseidel/Library/Logs/DumpRenderTree/HangReport.txt Exiting early after 1 failures. 8746 tests run. 210.59s total testing time 8745 test cases (99%) succeeded 1 test case (<1%) timed out 4 test cases (<1%) had stderr output Full output: http://webkit-commit-queue.appspot.com/results/138507 174419 20 45405 eric 2009-12-22 14:52:32 -0800 Comment on attachment 45405 Revised patch Your patch was another victim of bug 30392. 174425 21 45405 commit-queue 2009-12-22 15:00:27 -0800 Comment on attachment 45405 Revised patch Clearing flags on attachment: 45405 Committed r52504: <http://trac.webkit.org/changeset/52504> 174426 22 commit-queue 2009-12-22 15:00:37 -0800 All reviewed patches have been landed. Closing bug. 174570 23 evan 2009-12-23 04:22:50 -0800 BTW, I'm surprised you need the libNames list; dlopen knows to search the library path if you give it a plain filename without slashes (which will also make this code work for people who have libGL in /usr/local/lib or whatever) 175732 24 evan 2009-12-29 15:57:57 -0800 For those who care, I filed https://bugs.webkit.org/show_bug.cgi?id=33032 about the dlopen thing 45362 2009-12-21 19:37:04 -0800 2009-12-22 14:19:00 -0800 Patch crash.patch text/plain 11606 kbr SW5kZXg6IFdlYktpdC9jaHJvbWl1bS9DaGFuZ2VMb2cKPT09PT09PT09PT09PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PQotLS0gV2ViS2l0L2No cm9taXVtL0NoYW5nZUxvZwkocmV2aXNpb24gNTI0NzUpCisrKyBXZWJLaXQvY2hyb21pdW0vQ2hh bmdlTG9nCSh3b3JraW5nIGNvcHkpCkBAIC0xLDMgKzEsMjUgQEAKKzIwMDktMTItMjEgIEtlbm5l dGggUnVzc2VsbCAgPGtickBnb29nbGUuY29tPgorCisgICAgICAgIFJldmlld2VkIGJ5IE5PQk9E WSAoT09QUyEpLgorCisgICAgICAgIFtDaHJvbWl1bV0gV2ViR0wgY3Jhc2hlcyBpbnRlcm1pdHRl 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