https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97461
--- Comment #13 from Sergei Trofimovich <slyfox at gcc dot gnu.org> ---
Tried firefox-82 with LTO+PGO today on gcc-11-4428-g4a369d199bf. It gets a lot
more forward, but still gets stuck. This time on free()->allocate_gcov_kvp
()->alloc() deadloc.
The backtrace:
(gdb) bt
#0 __lll_lock_wait (futex=0x7ffff7800018, private=0) at lowlevellock.c:52
#1 0x00007ffff7f69305 in __GI___pthread_mutex_lock (mutex=0x7ffff7800018) at
../nptl/pthread_mutex_lock.c:135
#2 0x00005555555b2151 in arena_t::MallocSmall(unsigned long, bool) ()
#3 0x00005555555b307c in arena_t::Malloc(unsigned long, bool) ()
#4 0x00005555555b41f2 in calloc ()
#5 0x00005555556a49ab in allocate_gcov_kvp () at
/var/tmp/portage/sys-devel/gcc-11.0.0_pre9999/work/gcc-11.0.0_pre9999/libgcc/libgcov.h:431
#6 gcov_topn_add_value (count=1, use_atomic=1, increment_total=1, value=496,
counters=0x5555557158c0
<__gcov3._ZL20arena_run_reg_dallocP11arena_run_tP11arena_bin_tPvm>)
at
/var/tmp/portage/sys-devel/gcc-11.0.0_pre9999/work/gcc-11.0.0_pre9999/libgcc/libgcov.h:477
#7 __gcov_topn_values_profiler_body (use_atomic=1, value=496,
counters=0x5555557158c0
<__gcov3._ZL20arena_run_reg_dallocP11arena_run_tP11arena_bin_tPvm>)
at
/var/tmp/portage/sys-devel/gcc-11.0.0_pre9999/work/gcc-11.0.0_pre9999/libgcc/libgcov-profiler.c:103
#8 __gcov_topn_values_profiler_atomic (counters=0x5555557158c0
<__gcov3._ZL20arena_run_reg_dallocP11arena_run_tP11arena_bin_tPvm>, value=496)
at
/var/tmp/portage/sys-devel/gcc-11.0.0_pre9999/work/gcc-11.0.0_pre9999/libgcc/libgcov-profiler.c:128
#9 0x00005555555b1065 in arena_t::DallocSmall(arena_chunk_t*, void*,
arena_chunk_map_t*) ()
#10 0x00005555555b166c in free ()
#11 0x00007fffe1b0ef1a in CollectProcessInfo(ProcessInfo&) () at
/home/slyfox/tmp/portage/www-client/firefox-82.0/work/firefox_build/instrumented/dist/firefox/libxul.so
#12 0x00007fffea0afa72 in PreRecordMetaInformation() () at
/home/slyfox/tmp/portage/www-client/firefox-82.0/work/firefox_build/instrumented/dist/firefox/libxul.so
#13 0x00007fffea0b28c8 in profiler_shutdown(IsFastShutdown) () at
/home/slyfox/tmp/portage/www-client/firefox-82.0/work/firefox_build/instrumented/dist/firefox/libxul.so
#14 0x00007fffea7c6aa0 in XREMain::XRE_main(int, char**,
mozilla::BootstrapConfig const&) ()
at
/home/slyfox/tmp/portage/www-client/firefox-82.0/work/firefox_build/instrumented/dist/firefox/libxul.so
#15 0x00007fffea7c7543 in XRE_main(int, char**, mozilla::BootstrapConfig
const&) () at
/home/slyfox/tmp/portage/www-client/firefox-82.0/work/firefox_build/instrumented/dist/firefox/libxul.so
#16 0x00007fffea7cfbd0 in mozilla::BootstrapImpl::XRE_main(int, char**,
mozilla::BootstrapConfig const&) ()
at
/home/slyfox/tmp/portage/www-client/firefox-82.0/work/firefox_build/instrumented/dist/firefox/libxul.so
#17 0x000055555559a370 in do_main(int, char**, char**) ()
#18 0x00005555555980a1 in main ()
Worth filing a new bug, or this would be good enough?
