[OE-core] GCC 4.9 considered evil

Fri Aug 15 14:53:14 UTC 2014

On Thu, Aug 14, 2014 at 10:24:29AM +0200, Carlos Rafael Giani wrote:
> On 08/14/2014 10:22 AM, Peter A. Bigot wrote:
> > On 08/14/2014 03:12 AM, Carlos Rafael Giani wrote:
> >> On 08/14/2014 02:46 AM, Khem Raj wrote:
> >>>
> >>>
> >>> On Wednesday, August 13, 2014, Otavio Salvador 
> >>> <otavio at ossystems.com.br <mailto:otavio at ossystems.com.br>> wrote:
> >>>
> >>>     On Wed, Aug 13, 2014 at 6:24 PM, Gary Thomas <gary at mlbassoc.com
> >>>     <javascript:;>> wrote:
> >>>     > I've found that the latest GCC doesn't work very well, at
> >>>     > least not on ARM (and obviously other architectures as well [1])
> >>>     > When I build Google Chromium browser for my i.MX boards using
> >>>     > GCC-4.9.x, no pages can be rendered - massive bloodshed and
> >>>     > failures are shown on the console.  If I use the older GCC 4.8.2,
> >>>     > everything else the same, all is well.
> >>>     >
> >>>     > Here's my configuration:
> >>>     > BB_VERSION        = "1.23.1"
> >>>     > BUILD_SYS         = "x86_64-linux"
> >>>     > NATIVELSBSTRING   = "Ubuntu-13.10"
> >>>     > TARGET_SYS        = "arm-amltd-linux-gnueabi"
> >>>     > MACHINE           = "teton-p0382"
> >>>     > DISTRO            = "amltd"
> >>>     > DISTRO_VERSION    = "1.6+snapshot-20140812"
> >>>     > TUNE_FEATURES     = "arm armv7a vfp neon callconvention-hard
> >>>     cortexa9"
> >>>     > TARGET_FPU        = "vfp-neon"
> >>>     > meta              =
> >>>     "master:86afd7eb7c679eb065706137f28f44248f3fbc5a"
> >>>     > meta-amltd        =
> >>>     "master:899529b4184dc9e3e291e7fcdbbf157233db056d"
> >>>     > meta-teton-imx6-p0382 =
> >>>     "master:9188e2f8fafd203c95dcd7a3c79cb38a1568e9b5"
> >>>     > meta-fsl-arm      =
> >>>     "master:b0cf5c78c5f98c5977ae556d331e7495648f154c"
> >>>     > meta-fsl-arm-extra =
> >>>     "master:12e560967b7136222c325d11633295fe3a0c701c"
> >>>     > meta-browser      =
> >>>     "master:da93c8e386133a15eff1414d9307c8f2c7a44787"
> >>>     >
> >>>     > Should this be filed as a bug?  I don't have much data other
> >>>     than it
> >>>     > simply breaks (and chrome is not the easiest thing to debug!).
> >>>      Other
> >>>     > applications seem OK, but I am loathe to trust it...
> >>>     >
> >>>     > I'm going to hold onto GCC-4.8.x for my $DISTRO at least (and
> >>>     I hope
> >>>     > it doesn't vanish like 4.7.x did too quickly).
> >>>     >
> >>>     > [1]
> >>>     >
> >>>     http://slashdot.org/story/14/07/27/1838219/linus-torvalds-gcc-490-seems-to-be-terminally-broken
> >>>     >
> >>>     > Note: I've also tried this on qemux86 (a totally different
> >>>     > architecture) and chrome bombs just as badly!
> >>>
> >>>     I confirm that GCC 4.9 does NOT work for Chromium 35. At this
> >>>     moment I
> >>>     am not aware of any fix for it.
> >>>
> >>>
> >>> Again Its a broad brush statement. Something concrete is needed if 
> >>> some.action is to taken
> >>>
> >>>
> >>>     IIRC the Chromium 37 works though.
> >>>
> >>>
> >>> Well then its less chance.that someone will fix 35
> >>>
> >>>     --
> >>>     Otavio Salvador                             O.S. Systems
> >>>     http://www.ossystems.com.br http://code.ossystems.com.br
> >>>     Mobile: +55 (53) 9981-7854            Mobile: +1 (347) 903-9750
> >>>     --
> >>>     _______________________________________________
> >>>     Openembedded-core mailing list
> >>>     Openembedded-core at lists.openembedded.org <javascript:;>
> >>>     http://lists.openembedded.org/mailman/listinfo/openembedded-core
> >>>
> >>>
> >>>
> >>
> >>
> >> The problem is that narrowing down is very difficult, since the 
> >> problems manifest themselves as seemingly random stack corruptions. I 
> >> have tried to dig into it, but got nowhere. Pointers suddenly became 
> >> null for no apparent reason, or were corrupted, free() calls failed, 
> >> values on the stack suddenly changed without being modified by the 
> >> code etc.
> >>
> >> I wouldn't rule out that Linus Torvald's find isn't the cause here. 
> >> Look at this part of his message:
> >>
> >> "The x86-64 ABI specifies a 128-byte red-zone under the stack 
> >> pointer, and this is ok by that limit. It looks like it's illegal 
> >> (136 > 128), but the fact is, we've had four "pushq"s to update %rsp 
> >> since loading the frame pointer, so it's just *barely* legal with the 
> >> red-zoning."
> >>
> >> Perhaps gcc is pushing further outside of the red zone bounds, thus 
> >> causing the problems. No idea how to check for that at the moment though.
> >
> > Simplest would be to apply the upstream fix to Yocto's gcc and see if 
> > that helps.  You'd want commit 
> > 556537c4ad0df4cbebb74197bb2bdea75cf5dd35 from 
> > git://gcc.gnu.org/git/gcc.git.  (The patch went into gcc-4_9-branch 
> > one day after 4.9.1 was released.)
> >
> > I'd add it to the current set but ATT Khem and I both have pending 
> > patches that touch the same gcc files, so it'd just increase the 
> > conflicts.
> >
> > Peter
> >
> >>
> >>
> >
> >
> >
> 
> 
> 
> To further elaborate, the Chromium developers know about problems with 
> GCC 4.9. Here is an example: 
> https://code.google.com/p/chromium/issues/detail?id=385729
> 
> Note that while a build of Chromium 37 works, I've had internal compiler 
> errors happen. I actually had to re-run the run.do_compile script about 
> 30 times until the build finished (the ICE's happen only sometimes, so 
> repeated attempts at compiling eventually yields a result.)
> 
> Thanks for the link. I'll try it out when I have the time. Aside from 
> that, I recommend to keep the GCC 4.8 recipes for the time being. At 
> least they should not be removed as quickly as the 4.7 ones.

You're not seeing this with 37* chromium builds?

It's repeated in all world builds for some time.

| /home/jenkins/oe/world/shr-core/tmp-eglibc/sysroots/x86_64-linux/usr/bin/x86_64-oe-linux/x86_64-oe-linux-ld.gold: warning: hidden symbol 'sqlite3_mprintf' in obj/third_party/sqlite/libsqlite3.a(obj/third_party/sqlite/amalgamation/sqlite.sqlite3.o) is referenced by DSO /home/jenkins/oe/world/shr-core/tmp-eglibc/sysroots/qemux86-64/usr/lib/../lib/libsoftokn3.so
| /home/jenkins/oe/world/shr-core/tmp-eglibc/sysroots/x86_64-linux/usr/bin/x86_64-oe-linux/x86_64-oe-linux-ld.gold: warning: hidden symbol 'sqlite3_exec' in obj/third_party/sqlite/libsqlite3.a(obj/third_party/sqlite/amalgamation/sqlite.sqlite3.o) is referenced by DSO /home/jenkins/oe/world/shr-core/tmp-eglibc/sysroots/qemux86-64/usr/lib/../lib/libsoftokn3.so
| /home/jenkins/oe/world/shr-core/tmp-eglibc/sysroots/x86_64-linux/usr/bin/x86_64-oe-linux/x86_64-oe-linux-ld.gold: warning: hidden symbol 'sqlite3_free' in obj/third_party/sqlite/libsqlite3.a(obj/third_party/sqlite/amalgamation/sqlite.sqlite3.o) is referenced by DSO /home/jenkins/oe/world/shr-core/tmp-eglibc/sysroots/qemux86-64/usr/lib/../lib/libsoftokn3.so
| /home/jenkins/oe/world/shr-core/tmp-eglibc/sysroots/x86_64-linux/usr/bin/x86_64-oe-linux/x86_64-oe-linux-ld.gold: warning: hidden symbol 'sqlite3_reset' in obj/third_party/sqlite/libsqlite3.a(obj/third_party/sqlite/amalgamation/sqlite.sqlite3.o) is referenced by DSO /home/jenkins/oe/world/shr-core/tmp-eglibc/sysroots/qemux86-64/usr/lib/../lib/libsoftokn3.so
| /home/jenkins/oe/world/shr-core/tmp-eglibc/sysroots/x86_64-linux/usr/bin/x86_64-oe-linux/x86_64-oe-linux-ld.gold: warning: hidden symbol 'sqlite3_finalize' in obj/third_party/sqlite/libsqlite3.a(obj/third_party/sqlite/amalgamation/sqlite.sqlite3.o) is referenced by DSO /home/jenkins/oe/world/shr-core/tmp-eglibc/sysroots/qemux86-64/usr/lib/../lib/libsoftokn3.so
| /home/jenkins/oe/world/shr-core/tmp-eglibc/sysroots/x86_64-linux/usr/bin/x86_64-oe-linux/x86_64-oe-linux-ld.gold: warning: hidden symbol 'sqlite3_close' in obj/third_party/sqlite/libsqlite3.a(obj/third_party/sqlite/amalgamation/sqlite.sqlite3.o) is referenced by DSO /home/jenkins/oe/world/shr-core/tmp-eglibc/sysroots/qemux86-64/usr/lib/../lib/libsoftokn3.so
| /home/jenkins/oe/world/shr-core/tmp-eglibc/sysroots/x86_64-linux/usr/bin/x86_64-oe-linux/x86_64-oe-linux-ld.gold: warning: hidden symbol 'sqlite3_step' in obj/third_party/sqlite/libsqlite3.a(obj/third_party/sqlite/amalgamation/sqlite.sqlite3.o) is referenced by DSO /home/jenkins/oe/world/shr-core/tmp-eglibc/sysroots/qemux86-64/usr/lib/../lib/libsoftokn3.so
| /home/jenkins/oe/world/shr-core/tmp-eglibc/sysroots/x86_64-linux/usr/bin/x86_64-oe-linux/x86_64-oe-linux-ld.gold: warning: hidden symbol 'sqlite3_column_int' in obj/third_party/sqlite/libsqlite3.a(obj/third_party/sqlite/amalgamation/sqlite.sqlite3.o) is referenced by DSO /home/jenkins/oe/world/shr-core/tmp-eglibc/sysroots/qemux86-64/usr/lib/../lib/libsoftokn3.so
| /home/jenkins/oe/world/shr-core/tmp-eglibc/sysroots/x86_64-linux/usr/bin/x86_64-oe-linux/x86_64-oe-linux-ld.gold: warning: hidden symbol 'sqlite3_prepare_v2' in obj/third_party/sqlite/libsqlite3.a(obj/third_party/sqlite/amalgamation/sqlite.sqlite3.o) is referenced by DSO /home/jenkins/oe/world/shr-core/tmp-eglibc/sysroots/qemux86-64/usr/lib/../lib/libsoftokn3.so
| /home/jenkins/oe/world/shr-core/tmp-eglibc/sysroots/x86_64-linux/usr/bin/x86_64-oe-linux/x86_64-oe-linux-ld.gold: warning: hidden symbol 'sqlite3_bind_blob' in obj/third_party/sqlite/libsqlite3.a(obj/third_party/sqlite/amalgamation/sqlite.sqlite3.o) is referenced by DSO /home/jenkins/oe/world/shr-core/tmp-eglibc/sysroots/qemux86-64/usr/lib/../lib/libsoftokn3.so
| /home/jenkins/oe/world/shr-core/tmp-eglibc/sysroots/x86_64-linux/usr/bin/x86_64-oe-linux/x86_64-oe-linux-ld.gold: warning: hidden symbol 'sqlite3_bind_int' in obj/third_party/sqlite/libsqlite3.a(obj/third_party/sqlite/amalgamation/sqlite.sqlite3.o) is referenced by DSO /home/jenkins/oe/world/shr-core/tmp-eglibc/sysroots/qemux86-64/usr/lib/../lib/libsoftokn3.so
| /home/jenkins/oe/world/shr-core/tmp-eglibc/sysroots/x86_64-linux/usr/bin/x86_64-oe-linux/x86_64-oe-linux-ld.gold: warning: hidden symbol 'sqlite3_bind_text' in obj/third_party/sqlite/libsqlite3.a(obj/third_party/sqlite/amalgamation/sqlite.sqlite3.o) is referenced by DSO /home/jenkins/oe/world/shr-core/tmp-eglibc/sysroots/qemux86-64/usr/lib/../lib/libsoftokn3.so
| /home/jenkins/oe/world/shr-core/tmp-eglibc/sysroots/x86_64-linux/usr/bin/x86_64-oe-linux/x86_64-oe-linux-ld.gold: warning: hidden symbol 'sqlite3_open' in obj/third_party/sqlite/libsqlite3.a(obj/third_party/sqlite/amalgamation/sqlite.sqlite3.o) is referenced by DSO /home/jenkins/oe/world/shr-core/tmp-eglibc/sysroots/qemux86-64/usr/lib/../lib/libsoftokn3.so
| /home/jenkins/oe/world/shr-core/tmp-eglibc/sysroots/x86_64-linux/usr/bin/x86_64-oe-linux/x86_64-oe-linux-ld.gold: warning: hidden symbol 'sqlite3_busy_timeout' in obj/third_party/sqlite/libsqlite3.a(obj/third_party/sqlite/amalgamation/sqlite.sqlite3.o) is referenced by DSO /home/jenkins/oe/world/shr-core/tmp-eglibc/sysroots/qemux86-64/usr/lib/../lib/libsoftokn3.so
| /home/jenkins/oe/world/shr-core/tmp-eglibc/sysroots/x86_64-linux/usr/bin/x86_64-oe-linux/x86_64-oe-linux-ld.gold: warning: hidden symbol 'sqlite3_column_bytes' in obj/third_party/sqlite/libsqlite3.a(obj/third_party/sqlite/amalgamation/sqlite.sqlite3.o) is referenced by DSO /home/jenkins/oe/world/shr-core/tmp-eglibc/sysroots/qemux86-64/usr/lib/../lib/libsoftokn3.so
| /home/jenkins/oe/world/shr-core/tmp-eglibc/sysroots/x86_64-linux/usr/bin/x86_64-oe-linux/x86_64-oe-linux-ld.gold: warning: hidden symbol 'sqlite3_column_blob' in obj/third_party/sqlite/libsqlite3.a(obj/third_party/sqlite/amalgamation/sqlite.sqlite3.o) is referenced by DSO /home/jenkins/oe/world/shr-core/tmp-eglibc/sysroots/qemux86-64/usr/lib/../lib/libsoftokn3.so
| /home/jenkins/oe/world/shr-core/tmp-eglibc/sysroots/x86_64-linux/usr/bin/x86_64-oe-linux/x86_64-oe-linux-ld.gold: warning: hidden symbol 'sqlite3_file_control' in obj/third_party/sqlite/libsqlite3.a(obj/third_party/sqlite/amalgamation/sqlite.sqlite3.o) is referenced by DSO /home/jenkins/oe/world/shr-core/tmp-eglibc/sysroots/qemux86-64/usr/lib/../lib/libsoftokn3.so
| /home/jenkins/oe/world/shr-core/tmp-eglibc/sysroots/x86_64-linux/usr/bin/x86_64-oe-linux/x86_64-oe-linux-ld.gold: warning: hidden symbol 'sqlite3_temp_directory' in obj/third_party/sqlite/libsqlite3.a(obj/third_party/sqlite/amalgamation/sqlite.sqlite3.o) is referenced by DSO /home/jenkins/oe/world/shr-core/tmp-eglibc/sysroots/qemux86-64/usr/lib/../lib/libsoftokn3.so
| /home/jenkins/oe/world/shr-core/tmp-eglibc/sysroots/x86_64-linux/usr/bin/x86_64-oe-linux/x86_64-oe-linux-ld.gold: error: treating warnings as errors
| collect2: error: ld returned 1 exit status
| ninja: build stopped: subcommand failed.
| WARNING: exit code 1 from a shell command.
| ERROR: Function failed: do_compile (log file is located at /home/jenkins/oe/world/shr-core/tmp-eglibc/work/core2-64-oe-linux/chromium/37.0.2062.0-r0/temp/log.do_compile.14955)
NOTE: recipe chromium-37.0.2062.0-r0: task do_compile: Failed

-- 
Martin 'JaMa' Jansa     jabber: Martin.Jansa at gmail.com
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