Re: [gentoo-user] libv8 segfault

[Nilesh Govindrajan]

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@××××××××.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.

--
Nilesh Govindarajan
http://nileshgr.com