[Bug libstdc++/110016] Possible miscodegen when inlining std::condition_variable::wait predicate causes deadlock

["pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110016

--- Comment #6 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #5)
> Did you try on some other target than x86 for gcc?

To answer my own question is that it fails on aarch64-linux-gnu also. So this
makes it more likely a library issue (maybe glibc ...)


Thread 26 (Thread 0xffffe5f3ea10 (LWP 1003246)):
#0  0x0000fffff6acd22c in futex_wait_cancelable (private=<optimized out>,
expected=0, futex_word=0xfffff3103c64) at
../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0xfffff3103c08,
cond=0xfffff3103c38) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0xfffff3103c38, mutex=0xfffff3103c08) at
pthread_cond_wait.c:655
#3  0x0000fffff6efc2e4 in __tsan::call_pthread_cancel_with_cleanup
(fn=fn@entry=0xfffff6eafd00 <_FUN(void*)>, cleanup=cleanup@entry=0xfffff6eb5364
<_FUN(void*)>, arg=arg@entry=0xffffe5f3e0d0) at
/home/ubuntu/src/upstream-gcc-aarch64/gcc/libsanitizer/tsan/tsan_platform_linux.cpp:493
#4  0x0000fffff6ed4194 in cond_wait<__interceptor_pthread_cond_wait(void*,
void*)::<lambda()> > (m=0xfffff3103c08, c=0xfffff3103c38, fn=...,
si=0xffffe5f3e0b0, pc=281474824487080, thr=<optimized out>) at
/home/ubuntu/src/upstream-gcc-aarch64/gcc/libsanitizer/tsan/tsan_interceptors_posix.cpp:1259
#5  __interceptor_pthread_cond_wait (c=<optimized out>, m=0xfffff3103c08) at
/home/ubuntu/src/upstream-gcc-aarch64/gcc/libsanitizer/tsan/tsan_interceptors_posix.cpp:1270
#6  0x0000000000403850 in
std::condition_variable::wait<substrate::threadPool_t<bool
()>::waitWork()::{lambda()#1}>(std::unique_lock<std::mutex>&,
substrate::threadPool_t<bool ()>::waitWork()::{lambda()#1}) (__p=...,
__lock=..., this=0xfffff3103c38)
    at /home/ubuntu/upstream-gcc/include/c++/14.0.0/bits/atomic_base.h:503
#7  substrate::threadPool_t<bool ()>::waitWork() (this=0xfffff3103c00) at
t.cc:287
#8  substrate::threadPool_t<bool ()>::workerThread(unsigned long)
(processor=<optimized out>, this=0xfffff3103c00) at t.cc:312
#9  substrate::threadPool_t<bool ()>::threadPool_t(bool
(*)())::{lambda(unsigned long)#1}::operator()(unsigned long) const
(currentProcessor=<error reading variable: dwarf2_find_location_expression:
Corrupted DWARF expression.>, __closure=<optimized out>) at t.cc:338
#10 std::__invoke_impl<void, substrate::threadPool_t<bool
()>::threadPool_t(bool (*)())::{lambda(unsigned long)#1}, unsigned
long>(std::__invoke_other, substrate::threadPool_t<bool ()>::threadPool_t(bool
(*)())::{lambda(unsigned long)#1}&&, unsigned long&&) (__f=...)
    at /home/ubuntu/upstream-gcc/include/c++/14.0.0/bits/invoke.h:61
#11 std::__invoke<substrate::threadPool_t<bool ()>::threadPool_t(bool
(*)())::{lambda(unsigned long)#1}, unsigned long>(std::__invoke_result&&,
(substrate::threadPool_t<bool ()>::threadPool_t(bool (*)())::{lambda(unsigned
long)#1}&&)...) (__fn=...) at
/home/ubuntu/upstream-gcc/include/c++/14.0.0/bits/invoke.h:96
#12 std::thread::_Invoker<std::tuple<substrate::threadPool_t<bool
()>::threadPool_t(bool (*)())::{lambda(unsigned long)#1}, unsigned long>
>::_M_invoke<0ul, 1ul>(std::_Index_tuple<0ul, 1ul>) (this=<optimized out>) at
/home/ubuntu/upstream-gcc/include/c++/14.0.0/bits/std_thread.h:292
#13 std::thread::_Invoker<std::tuple<substrate::threadPool_t<bool
()>::threadPool_t(bool (*)())::{lambda(unsigned long)#1}, unsigned long>
>::operator()() (this=<optimized out>) at
/home/ubuntu/upstream-gcc/include/c++/14.0.0/bits/std_thread.h:299
#14
std::thread::_State_impl<std::thread::_Invoker<std::tuple<substrate::threadPool_t<bool
()>::threadPool_t(bool (*)())::{lambda(unsigned long)#1}, unsigned long> >
>::_M_run() (this=<optimized out>) at
/home/ubuntu/upstream-gcc/include/c++/14.0.0/bits/std_thread.h:244
#15 0x0000fffff6ced74c in std::execute_native_thread_routine
(__p=0xfffff56004a0) at
/home/ubuntu/src/upstream-gcc-aarch64/gcc/libstdc++-v3/src/c++11/thread.cc:104
#16 0x0000fffff6eaf63c in __tsan_thread_start_func (arg=0xfffffffff730) at
/home/ubuntu/src/upstream-gcc-aarch64/gcc/libsanitizer/tsan/tsan_interceptors_posix.cpp:1038
#17 0x0000fffff6ac7088 in start_thread (arg=0xfffffffff66f) at
pthread_create.c:463
#18 0x0000fffff6a304ec in thread_start () at
../sysdeps/unix/sysv/linux/aarch64/clone.S:78