635325 - WebGL SIGSEGV crash in strcmp

Status: RESOLVED DUPLICATE of bug 635401

(Core :: Graphics: CanvasWebGL, defect)

Description

[Gregor Wagner [:gwagner]]

http://www.chromeexperiments.com/detail/jellyfish/?f=webgl

Whenever I start the WebGL demo on Linux I get the following crash:
Maybe a library issue?

0x00007fc35a3ad39d in nanosleep () at ../sysdeps/unix/syscall-template.S:82
82	../sysdeps/unix/syscall-template.S: No such file or directory.
	in ../sysdeps/unix/syscall-template.S
(gdb) bt
#0  0x00007fc35a3ad39d in nanosleep () at ../sysdeps/unix/syscall-template.S:82
#1  0x00007fc35a3ad210 in __sleep (seconds=<value optimized out>) at ../sysdeps/unix/sysv/linux/sleep.c:138
#2  0x00007fc35edf154b in ah_crap_handler (signum=11) at /home/mozilla/gwagner/ws0/toolkit/xre/nsSigHandlers.cpp:132
#3  0x00007fc35edf6160 in nsProfileLock::FatalSignalHandler (signo=11, info=0x7fff5cdf0e30, context=0x7fff5cdf0d00) at nsProfileLock.cpp:226
#4  <signal handler called>
#5  __strcmp_sse42 () at ../sysdeps/x86_64/multiarch/strcmp.S:129
#6  0x00007fc3607ece15 in mozilla::gl::GLXLibrary::EnsureInitialized (this=0x7fc361fceb20)
    at /home/mozilla/gwagner/ws0/gfx/thebes/GLContextProviderGLX.cpp:186
#7  0x00007fc3607ed76e in CreateOffscreenPixmapContext (aSize=..., aFormat=..., aShare=1)
    at /home/mozilla/gwagner/ws0/gfx/thebes/GLContextProviderGLX.cpp:561
#8  0x00007fc3607eddab in mozilla::gl::GLContextProviderGLX::CreateOffscreen (aSize=..., aFormat=...)
    at /home/mozilla/gwagner/ws0/gfx/thebes/GLContextProviderGLX.cpp:681
#9  0x00007fc35f55e481 in mozilla::WebGLContext::SetDimensions (this=0x7fc33d3c5800, width=968, height=817)
    at /home/mozilla/gwagner/ws0/content/canvas/src/WebGLContext.cpp:477
#10 0x00007fc35f610930 in nsHTMLCanvasElement::UpdateContext (this=0x7fc33d937ce0, aNewContextOptions=0x0)
    at /home/mozilla/gwagner/ws0/content/html/content/src/nsHTMLCanvasElement.cpp:611
#11 0x00007fc35f6104db in nsHTMLCanvasElement::GetContext (this=0x7fc33d937ce0, aContextId=..., aContextOptions=..., aContext=0x7fff5cdf1c90)
    at /home/mozilla/gwagner/ws0/content/html/content/src/nsHTMLCanvasElement.cpp:534
#12 0x00007fc35fe49fce in nsIDOMHTMLCanvasElement_GetContext (cx=0x7fc33e7a0c00, argc=1, vp=0x7fc34dbfe2a8) at dom_quickstubs.cpp:20366
#13 0x00007fc36096e1f8 in js::CallJSNative (cx=0x7fc33e7a0c00, native=0x7fc35fe49d6a <nsIDOMHTMLCanvasElement_GetContext>, argc=1, 
    vp=0x7fc34dbfe2a8) at /home/mozilla/gwagner/ws0/js/src/jscntxtinlines.h:701
#14 0x00007fc360bbf032 in js::Interpret (cx=0x7fc33e7a0c00, entryFrame=0x7fc34dbfe178, inlineCallCount=2, interpMode=JSINTERP_NORMAL)
    at /home/mozilla/gwagner/ws0/js/src/jsinterp.cpp:4763
#15 0x00007fc36096a1ec in js::RunScript (cx=0x7fc33e7a0c00, script=0x7fc33d38c600, fp=0x7fc34dbfe178)
    at /home/mozilla/gwagner/ws0/js/src/jsinterp.cpp:650
#16 0x00007fc36096a6b7 in js::Invoke (cx=0x7fc33e7a0c00, argsRef=..., flags=8192) at /home/mozilla/gwagner/ws0/js/src/jsinterp.cpp:730
#17 0x00007fc360942c13 in js_fun_call (cx=0x7fc33e7a0c00, argc=1, vp=0x7fc34dbfe130) at /home/mozilla/gwagner/ws0/js/src/jsfun.cpp:2143
#18 0x00007fc36096e1f8 in js::CallJSNative (cx=0x7fc33e7a0c00, native=0x7fc3609429ed <js_fun_call(JSContext*, unsigned int, js::Value*)>, 
    argc=2, vp=0x7fc34dbfe130) at /home/mozilla/gwagner/ws0/js/src/jscntxtinlines.h:701
#19 0x00007fc360bbf032 in js::Interpret (cx=0x7fc33e7a0c00, entryFrame=0x7fc34dbfe060, inlineCallCount=1, interpMode=JSINTERP_NORMAL)

Comment 1

[Benoit Jacob [:bjacob] (mostly away)]

Beta11 or nightlies?
What's your graphics driver?
Did you define MOZ_GLX_IGNORE_BLACKLIST?
Did you set layers.acceleration.force-enabled?

Comment 2

[Gregor Wagner [:gwagner]]

(In reply to comment #1)
> Beta11 or nightlies?

Tracemonkey build from yesterday

> What's your graphics driver?

07:00.0 VGA compatible controller: ATI Technologies Inc Device 68d8

> Did you define MOZ_GLX_IGNORE_BLACKLIST?

No don't think so.

> Did you set layers.acceleration.force-enabled?
No don't think so.

The machine is in MV so I can give you access if you want.

Comment 3

[Benoit Jacob [:bjacob] (mostly away)]

Does your build include this changeset?
http://hg.mozilla.org/mozilla-central/rev/be64c2d2b306

It should really fix exactly your crash (which was the top linux crasher last week, and was landed last weekend (despite the commit date on Friday).

Comment 4

[Benoit Jacob [:bjacob] (mostly away)]

...and note that your graphics driver is currently blacklisted. If you want to try WebGL stuff, define the env var MOZ_GLX_IGNORE_BLACKLIST.

Comment 5

[Gregor Wagner [:gwagner]]

It still crashes with a MC debug build from today.
Shouldn't I get an error or warning if I don't define the ignore blacklist?

Comment 6

[Benoit Jacob [:bjacob] (mostly away)]

Definitely, you shouldn't crash if you don't ignore the blacklist. That's the point of a blacklist.

Can you please attach a backtrace from your MC debug build from today?

Also, what are the last lines of terminal output? Anything about a X error?

The backtrace in comment 0 would be weird if it applied to today's MC. Indeed, it's apparently the default X error handler aborting here, and that shouldn't happen there because at this place we have set up a custom X error handler to avoid that. So, the exact line number in GLContextProviderGLX.cpp matters.

Comment 7

[Gregor Wagner [:gwagner]]

WARNING: No script language registered for this mime-type: file /home/mozilla/gwagner/mozilla-central/dom/base/nsDOMScriptObjectFactory.cpp, line 160
WARNING: Failed to find a scripting language: file /home/mozilla/gwagner/mozilla-central/content/base/src/nsScriptLoader.cpp, line 459
WARNING: No script language registered for this mime-type: file /home/mozilla/gwagner/mozilla-central/dom/base/nsDOMScriptObjectFactory.cpp, line 160
WARNING: Failed to find a scripting language: file /home/mozilla/gwagner/mozilla-central/content/base/src/nsScriptLoader.cpp, line 459
JavaScript strict warning: resource://testpilot/modules/setup.js, line 353: assignment to undeclared variable i

Program received signal SIGSEGV, Segmentation fault.
__strcmp_sse42 () at ../sysdeps/x86_64/multiarch/strcmp.S:129
129	../sysdeps/x86_64/multiarch/strcmp.S: No such file or directory.
	in ../sysdeps/x86_64/multiarch/strcmp.S
(gdb) bt
#0  __strcmp_sse42 () at ../sysdeps/x86_64/multiarch/strcmp.S:129
#1  0x00007ffff63ca669 in mozilla::gl::GLXLibrary::EnsureInitialized (this=0x7ffff7bb9b40)
    at /home/mozilla/gwagner/mozilla-central/gfx/thebes/GLContextProviderGLX.cpp:186
#2  0x00007ffff63cafc2 in CreateOffscreenPixmapContext (aSize=..., aFormat=..., aShare=1)
    at /home/mozilla/gwagner/mozilla-central/gfx/thebes/GLContextProviderGLX.cpp:561
#3  0x00007ffff63cb5ff in mozilla::gl::GLContextProviderGLX::CreateOffscreen (aSize=..., aFormat=...)
    at /home/mozilla/gwagner/mozilla-central/gfx/thebes/GLContextProviderGLX.cpp:681
#4  0x00007ffff513a801 in mozilla::WebGLContext::SetDimensions (this=0x7fffd1fba800, width=968, height=817)
    at /home/mozilla/gwagner/mozilla-central/content/canvas/src/WebGLContext.cpp:477
#5  0x00007ffff51ecb60 in nsHTMLCanvasElement::UpdateContext (this=0x7fffd1f70160, aNewContextOptions=0x0)
    at /home/mozilla/gwagner/mozilla-central/content/html/content/src/nsHTMLCanvasElement.cpp:611
#6  0x00007ffff51ec70b in nsHTMLCanvasElement::GetContext (this=0x7fffd1f70160, aContextId=..., aContextOptions=..., aContext=0x7fffffff9850)
    at /home/mozilla/gwagner/mozilla-central/content/html/content/src/nsHTMLCanvasElement.cpp:534

Comment 8

[Benoit Jacob [:bjacob] (mostly away)]

Ah, segfault in strcmp, that looks like a different issue: bug 635401. It has a patch already.

But regarding your crash in comment 0... that looked different. Can you try running with the environment variable MOZ_X_SYNC=1 ? Should give more consistent stacks.

Comment 9

[Karl Tomlinson (:karlt)]

The crash in comment 0 is the same.
ah_crap_handler in nsSigHandlers.cpp is the handler for fatal signals such as SEGV.

Forward duping to bug 635401 because that has a patch.