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From: "fragabr at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/64590] Firefox 34 triggers GCC AVX bug (segfault: XPCCallContext::GetJSContext (this=0xfffc7fffe3e23980))
Date: Wed, 14 Jan 2015 02:19:00 -0000 [thread overview]
Message-ID: <bug-64590-4-3FL3u8o8YZ@http.gcc.gnu.org/bugzilla/> (raw)
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64590
--- Comment #3 from Dâniel Fraga <fragabr at gmail dot com> ---
(In reply to Andrew Pinski from comment #2)
> Also can you try without "-floop-interchange -floop-strip-mine -floop-block"
> Since those are part of Graphite which might be the cause of the bug rather
> than the vectorizer.
Hi Andrew, unfortunately I don't have a simplified testcase, since I don't know
exactly what's causing this.
I compiled without "-floop-interchange -floop-strip-mine -floop-block" and it
also segfaulted:
Assertion failure: !rt->isHeapBusy(), at
/home/fraga/src/mozilla/js/src/jsapi.cpp:176
Program received signal SIGSEGV, Segmentation fault.
0x00007ffff4538d0c in js::AssertHeapIsIdle (rt=<optimized out>) at
/home/fraga/src/mozilla/js/src/jsapi.cpp:176
176 JS_ASSERT(!rt->isHeapBusy());
(gdb) bt
#0 0x00007ffff4538d0c in js::AssertHeapIsIdle (rt=<optimized out>) at
/home/fraga/src/mozilla/js/src/jsapi.cpp:176
#1 0x00007ffff454da1d in AssertHeapIsIdle (rt=<optimized out>) at
../../dist/include/js/Value.h:1694
#2 AssertHeapIsIdle (cx=0x7fffffff7720) at
/home/fraga/src/mozilla/js/src/jsapi.cpp:182
#3 JS_ValueToObject (cx=cx@entry=0x7fffffff7720, value=$jsval((JSObject *)
0x7fffdee21780 [object Proxy]), objp=..., objp@entry=0x0) at
/home/fraga/src/mozilla/js/src/jsapi.cpp:385
#4 0x00007ffff27e244b in nsXPCComponents_Utils::EvalInSandbox (this=<optimized
out>, source=..., sandboxVal=$jsval((JSObject *) 0x7fffdee21780 [object
Proxy]), version=...,
filenameArg=..., lineNumber=0, cx=0x7fffffff7720, optionalArgc=64 '@',
retval=$jsval(6.9533335314284608e-310)) at
/home/fraga/src/mozilla/js/xpconnect/src/XPCComponents.cpp:2635
#5 0x00007ffff22fb49e in NS_InvokeByIndex (that=<optimized out>,
methodIndex=<optimized out>, paramCount=<optimized out>, params=<optimized
out>)
at
/home/fraga/src/mozilla/xpcom/reflect/xptcall/md/unix/xptcinvoke_x86_64_unix.cpp:164
#6 0x00007ffff2826040 in Invoke (this=0x7fffffff7850) at
/home/fraga/src/mozilla/js/xpconnect/src/XPCWrappedNative.cpp:2370
#7 CallMethodHelper::Call (this=0x7fffffff7850) at
/home/fraga/src/mozilla/js/xpconnect/src/XPCWrappedNative.cpp:1731
#8 0x00007ffff2823809 in XPCWrappedNative::CallMethod (ccx=...,
mode=mode@entry=XPCWrappedNative::CALL_METHOD) at
/home/fraga/src/mozilla/js/xpconnect/src/XPCWrappedNative.cpp:1698
#9 0x00007ffff282b783 in XPC_WN_CallMethod (cx=0x7fffe66148c0, argc=<optimized
out>, vp=0x7fffffff7b50) at
/home/fraga/src/mozilla/js/xpconnect/src/XPCWrappedNativeJSOps.cpp:1288
#10 0x00007fffe67482e0 in ?? ()
#11 0x0000000000000000 in ?? ()
********************************************
I knew it wouldn't be related to Graphite since it will not crash if I compile
with Graphite and -march=nehalem.
Any hints?
>From gcc-bugs-return-473109-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jan 14 02:58:50 2015
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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/64590] Firefox 34 triggers GCC AVX bug (segfault: XPCCallContext::GetJSContext (this=0xfffc7fffe3e23980))
Date: Wed, 14 Jan 2015 02:58:00 -0000
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--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Dâniel Fraga from comment #3)
> (In reply to Andrew Pinski from comment #2)
> > Also can you try without "-floop-interchange -floop-strip-mine -floop-block"
> > Since those are part of Graphite which might be the cause of the bug rather
> > than the vectorizer.
>
> Hi Andrew, unfortunately I don't have a simplified testcase, since I don't
> know exactly what's causing this.
You did not answer my question: "Also what instruction is the segfault located
on"?
>From gcc-bugs-return-473110-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jan 14 03:04:45 2015
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From: "fragabr at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/64590] Firefox 34 triggers GCC AVX bug (segfault: XPCCallContext::GetJSContext (this=0xfffc7fffe3e23980))
Date: Wed, 14 Jan 2015 03:04:00 -0000
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--- Comment #5 from Dâniel Fraga <fragabr at gmail dot com> ---
(In reply to Andrew Pinski from comment #4)
> You did not answer my question: "Also what instruction is the segfault
> located on"?
Sorry. I read too fast. Do you mean AVX instruction? I put AVX at the title
because the segfault won't happen when compiling for Nehalem (or with
-mno-avx). I don't know what specific instruction is causing this (what I know
is that the segfault will only happen when AVX optimization is enabled).
If you tell me a way to discover what instruction or how to better debug this,
jusk ask and I can test here for you.
Thanks you.
>From gcc-bugs-return-473111-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jan 14 03:06:29 2015
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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/64590] Firefox 34 triggers GCC AVX bug (segfault: XPCCallContext::GetJSContext (this=0xfffc7fffe3e23980))
Date: Wed, 14 Jan 2015 03:06:00 -0000
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--- Comment #6 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Dâniel Fraga from comment #5)
> If you tell me a way to discover what instruction or how to better debug
> this, jusk ask and I can test here for you.
Try:
disassemble $pc,$pc
>From gcc-bugs-return-473112-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jan 14 03:20:47 2015
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/64590] Firefox 34 triggers GCC AVX bug (segfault: XPCCallContext::GetJSContext (this=0xfffc7fffe3e23980))
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--- Comment #7 from Dâniel Fraga <fragabr at gmail dot com> ---
(In reply to Andrew Pinski from comment #6)
> Try:
> disassemble $pc,$pc
(gdb) disassemble $pc,$pc
Dump of assembler code from 0x7ffff4538d0c to 0x7ffff4538d0c:
End of assembler dump.
***********
Empty dump? Is this correct or I did something wrong?
>From gcc-bugs-return-473113-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jan 14 03:28:12 2015
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/64590] Firefox 34 triggers GCC AVX bug (segfault: XPCCallContext::GetJSContext (this=0xfffc7fffe3e23980))
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--- Comment #8 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Dâniel Fraga from comment #7)
> (In reply to Andrew Pinski from comment #6)
> > Try:
> > disassemble $pc,$pc
>
> (gdb) disassemble $pc,$pc
> Dump of assembler code from 0x7ffff4538d0c to 0x7ffff4538d0c:
> End of assembler dump.
>
> ***********
>
> Empty dump? Is this correct or I did something wrong?
Try this:
disassemble $pc,$pc+0x10
>From gcc-bugs-return-473114-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jan 14 03:30:57 2015
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/64590] Firefox 34 triggers GCC AVX bug (segfault: XPCCallContext::GetJSContext (this=0xfffc7fffe3e23980))
Date: Wed, 14 Jan 2015 03:30:00 -0000
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--- Comment #9 from Dâniel Fraga <fragabr at gmail dot com> ---
(In reply to Andrew Pinski from comment #8)
> Try this:
> disassemble $pc,$pc+0x10
(gdb) disassemble $pc,$pc+0x10
Dump of assembler code from 0x7ffff4538d0c to 0x7ffff4538d1c:
=> 0x00007ffff4538d0c <js::AssertHeapIsIdle(JSRuntime*)+28>: movl $0x0,0x0
0x00007ffff4538d17 <js::AssertHeapIsIdle(JSRuntime*)+39>: ud2
0x00007ffff4538d19: nop
0x00007ffff4538d1a: nopw 0x0(%rax,%rax,1)
End of assembler dump.
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From: "tbsaunde at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/64521] [4.9/5 Regression] ICE with -frepo
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tbsaunde at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |tbsaunde at gcc dot gnu.org
--- Comment #2 from tbsaunde at gcc dot gnu.org ---
(In reply to Jonathan Wakely from comment #1)
> I have a doc patch somewhere advising against using -frepo ... it's not
> necessary on modern systems and seems to have bit-rotted.
should we just remove it? or is there a reason to keep it?
next prev parent reply other threads:[~2015-01-14 2:19 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-13 23:44 [Bug tree-optimization/64590] New: " fragabr at gmail dot com
2015-01-13 23:58 ` [Bug tree-optimization/64590] " pinskia at gcc dot gnu.org
2015-01-13 23:59 ` pinskia at gcc dot gnu.org
2015-01-14 2:19 ` fragabr at gmail dot com [this message]
2015-01-14 8:28 ` jakub at gcc dot gnu.org
2015-02-10 9:34 ` fragabr at gmail dot com
2015-02-11 5:31 ` dbaron at dbaron dot org
2015-02-11 11:06 ` fragabr at gmail dot com
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--in-reply-to=bug-64590-4-3FL3u8o8YZ@http.gcc.gnu.org/bugzilla/ \
--to=gcc-bugzilla@gcc.gnu.org \
--cc=gcc-bugs@gcc.gnu.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
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via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
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