Here is the change made to libgcc.so 4 years ago that seems to be causing
this problem -
https://github.com/gcc-mirror/gcc/commit/4b5fb32aba30762e0d8c9e75d1b46b47bee5eeb4
.
These 2 missing (hidden with versioning) are present in libgcc.a:
readelf -s /usr/lib/gcc/x86_64-linux-gnu/9/libgcc.a | grep
__cpu_indicator_init
13: 0000000000000290 905 FUNC GLOBAL HIDDEN 4
__cpu_indicator_init
We stopped linking libgcc.a as whole-archive year ago but even if we still
did it would not help us given this symbol is hidden.
I wonder how we should solve it.
On Thursday, November 28, 2019 at 3:18:48 PM UTC-5, Waldek Kozaczuk wrote:
>
> This is related to https://github.com/cloudius-systems/osv/issues/743.
>
> I have been trying to eliminate ancient libgcc_s.so from usr.manifest.skel
> and replace it with the version from host. When I do that most (C++ only?)
> apps fail like so:
>
> Cmdline: /java_isolated.so -cp /tests/java/tests.jar
> io.osv.TestDomainPermissions
> /usr/lib/libgcc_s.so.1: ignoring missing symbol __cpu_indicator_init
> /usr/lib/libgcc_s.so.1: ignoring missing symbol __cpu_model
> trying to execute or access missing symbol
> [backtrace]
> 0x000000004039d6ab <page_fault+267>
> 0x000000004039c486 <???+1077527686>
> 0x00000000403528ca <elf::program::init_library(int, char**)+362>
> 0x0000000040223cdd <osv::application::main()+61>
> 0x000000004042deb8 <???+1078124216>
> 0x000000004045fdb5 <???+1078328757>
> 0x00000000403f9ce7 <thread_main_c+39>
> 0x000000004039d402 <???+1077531650>
>
> I somehow discovered it has to do with versioning. So when I undo my
> commit that fixed libnuma (see
> https://github.com/cloudius-systems/osv/commit/ed1eed7a567ec17138c65f0a5628c2311603c712
> ).
>
> So if I manually undo these changes the error disappears. It is obviously
> related to these warnings:
> /usr/lib/libgcc_s.so.1: ignoring missing symbol __cpu_indicator_init
> /usr/lib/libgcc_s.so.1: ignoring missing symbol __cpu_model
>
> What is actually going on? And what is the right fix?
>
> I found couple of the things that might be related:
>
> https://bugzilla.redhat.com/show_bug.cgi?id=1688766
>
> http://cgit.openembedded.org/openembedded-core/tree/meta/recipes-devtools/gcc/gcc-9.2/0032-libgcc_s-Use-alias-for-__cpu_indicator_init-instead-.patch?h=master
>
> Waldek
>
>
>
>
>
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