Re: [gentoo-user] libv8 segfault

[Michael Mol <mikemol@gmail.com>]

On Wed, Jan 23, 2013 at 11:07 AM, Nilesh Govindrajan <me@nileshgr.com> wrote:
> On Wednesday 23 January 2013 09:29:22 PM IST, Michael Mol wrote:
>> On Wed, Jan 23, 2013 at 10:52 AM, Nilesh Govindrajan <me@nileshgr.com> wrote:
>>> I tried compiling all versions of chromium (-O3, but it always worked
>>> previously) & v8 (tried -O3 & -O2 too)
>>> but it always segfaults when I try to open the settings page.
>>>
>>> CrRendererMain[6059]: segfault at 500000000 ip 00007f0d0834970c sp
>>> 00007fff71d91a60 error 4 in libv8.so.3.15.11[7f0d08181000+45d000]
>>>
>>> Quite interestingly, the binary version of chrome works without hitches,
>>> which I don't want to run because I'm a little paranoid about it ;-)
>>> And that also means that there is no hardware fault.
>>>
>>> dev-lang/v8-3.15.11.5
>>> www-client/chromium-24.0.1312.56 (I'm at present using the google chrome
>>> beta, but chromium 25 doesn't work either).
>>>
>>> Flags:
>>> CFLAGS="-O3 -march=core2 -mtune=core2 -msse -msse2 -mssse3 -mmmx -pipe"
>>> CXXFLAGS="${CFLAGS}"
>>> LDFLAGS="-Wl,-O1 -Wl,--as-needed"
>>>
>>> Just replace that O3 with O2 for v8.
>>>
>>> Anybody knows what's going on here?
>>
>> What USE flags are enabled for chromium? You haven't specified that
>> you're using the custom-cflags USE flag, so whatever's in your global
>> CFLAGS setting is largely irrelevant.
>>
>> Also, you don't need to specify --as-needed; that's default, now. I
>> don't know what those other flags are doing.
>>
>> Start with revdep-rebuild, see if that fixes it. If not, you probably
>> ought to re-emerge chromium and its direct dependencies. Given your
>> recent experience with overclocking and the rather correct warnings
>> about silent data corruption, you may need to re-emerge a lot more
>> than that.
>>
>> --
>> :wq
>>
>
> I didn't merge anything while I was playing with overclocking.
> custom-cflags is enabled.
> I found the LDFLAGS on Gentoo Wiki as safe LDFLAGS for optimal
> performance.

Well, then that wiki page is out of date. :)

--
:wq