Re: [CURRENT]: weird memory/linker problem?

Am Mon, 23 Jun 2014 17:22:25 +0200
Dimitry Andric <dim_at_FreeBSD.org> schrieb:

> On 23 Jun 2014, at 16:31, O. Hartmann <ohartman_at_zedat.fu-berlin.de> wrote:
> > Am Sun, 22 Jun 2014 10:10:04 -0700
> > Adrian Chadd <adrian_at_freebsd.org> schrieb:
> >> When they segfault, where do they segfault?
> ...
> > GIMP, LaTeX work, nothing special, but a bit memory consuming regrading GIMP) I tried
> > updating the ports tree and surprisingly the tree is left over in a unclean condition
> > while /usr/bin/svn segfault (on console: pid 18013 (svn), uid 0: exited on signal 11
> > (core dumped)).
> > 
> > Using /usr/local/bin/svn, which is from the devel/subversion port, performs well,
> > while FreeBSD 11's svn contribution dies as described. It did not hours ago!
> 
> I think what Adrian meant was: can you run svn (or another crashing
> program) in gdb, and post a backtrace?  Or maybe run ktrace, and see
> where it dies?
> 
> Alternatively, put a core dump and the executable (with debug info) in a
> tarball, and upload it somewhere, so somebody else can analyze it.
> 
> -Dimitry
> 

It's me again, with the same weird story.

After a couple of days silence, the mysterious entity in my computer is back. This time
it is again a weird compiler message of failure (trying to buildworld):

[...]
c++  -O2 -pipe -O3 -O3 -I/usr/src/lib/clang/libllvmsupport/../../../contrib/llvm/include
-I/usr/src/lib/clang/libllvmsupport/../../../contrib/llvm/tools/clang/include
-I/usr/src/lib/clang/libllvmsupport/../../../contrib/llvm/lib/Support -I.
-I/usr/src/lib/clang/libllvmsupport/../../../contrib/llvm/../../lib/clang/include
-DLLVM_ON_UNIX -DLLVM_ON_FREEBSD -D__STDC_LIMIT_MACROS -D__STDC_CONSTANT_MACROS
-fno-strict-aliasing -DLLVM_DEFAULT_TARGET_TRIPLE=\"x86_64-unknown-freebsd11.0\"
-DLLVM_HOST_TRIPLE=\"x86_64-unknown-freebsd11.0\" -DDEFAULT_SYSROOT=\"\"
-Qunused-arguments -I/usr/obj/usr/src/tmp/legacy/usr/include -std=c++11 -fno-exceptions
-fno-rtti -Wno-c++11-extensions
-c /usr/src/lib/clang/libllvmsupport/../../../contrib/llvm/lib/Support/Host.cpp -o Host.o
--- GraphWriter.o --- In file included
from /usr/src/lib/clang/libllvmsupport/../../../contrib/llvm/lib/Support/GraphWriter.cpp:14: /usr/src/lib/clang/libllvmsupport/../../../contrib/llvm/include/llvm/Support/GraphWriter.h:269:10:
error: use of undeclared identifier 'DOD'; did you mean 'DOT'? O <<
DOD::EscapeString(Label); ^~~
DOT /usr/src/lib/clang/libllvmsupport/../../../contrib/llvm/include/llvm/Support/GraphWriter.h:35:11:
note: 'DOT' declared here namespace DOT {  // Private functions... ^ 1 error generated.
*** [GraphWriter.o] Error code 1


Well, in the past I saw many of those messages, especially not found labels of routines
in shared objects/libraries or even those "funny" misspelled messages shown above.

I can not reproduce them after a reboot, but as long as the system is running with this
error occured, it is sticky. So in order to compile the OS successfully, I reboot.

Does anyone have an idea what this could be? Since it affects at the moment only one
machine (the other CoreDuo has been retired in the meanwhile), it feels a bit like a
miscompilation on a certain type of CPU.

Thanks for your patience,

Oliver