http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55354
--- Comment #24 from Jakub Jelinek jakub at gcc dot gnu.org 2012-11-23
08:13:11 UTC ---
When I rebuild libtsan with -fPIE instead of -fPIC in the Makefile, and
g++ -shared -Wl,--whole-archive -o libtsanx.so libtsan.a -ldl -lpthread
(note
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55354
--- Comment #25 from Jakub Jelinek jakub at gcc dot gnu.org 2012-11-23
08:20:40 UTC ---
Have you considered using __builtin_expect to help the compiler in the
performance sensitive code? Or even better would be profile-feedback, build
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55354
--- Comment #26 from Dmitry Vyukov dvyukov at google dot com 2012-11-23
08:34:52 UTC ---
(In reply to comment #25)
Have you considered using __builtin_expect to help the compiler in the
performance sensitive code? Or even better would
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55354
--- Comment #27 from Konstantin Serebryany konstantin.s.serebryany at gmail
dot com 2012-11-23 10:47:14 UTC ---
is it really so crucial that you'd want to make another libtsan_pie.a for it?
I would actually prefer to have *only*
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55354
--- Comment #28 from Konstantin Serebryany konstantin.s.serebryany at gmail
dot com 2012-11-23 11:14:58 UTC ---
Note that today's upstream tsan sources don't link with -fPIC at all
because our assembly blobs are not PIC-friendly.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55354
--- Comment #22 from Dmitry Vyukov dvyukov at google dot com 2012-11-23
07:16:14 UTC ---
For dynamic libraries that are loaded into a non-instrumented executable
(e.g.
swig so preloaded into python process), we statically link the
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55354
--- Comment #23 from Dmitry Vyukov dvyukov at google dot com 2012-11-23
07:27:27 UTC ---
(In reply to comment #21)
(In reply to comment #20)
What I see is that it also affect code generation (register allocation). Do
we
need to
