GNU bug report logs - #76327
29.4; random segfaults after switch to tree-sitter

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Message #89 received at 76327 <at> debbugs.gnu.org (full text, mbox):

From: Evgeniy Dushistov <dushistov <at> mail.ru>
To: Pip Cet <pipcet <at> protonmail.com>
Cc: Eli Zaretskii <eliz <at> gnu.org>, Paul Eggert <eggert <at> cs.ucla.edu>,
 76327 <at> debbugs.gnu.org,
 Mattias Engdegård <mattiasengdegard <at> gmail.com>
Subject: Re: bug#76327: 29.4; random segfaults after switch to tree-sitter
Date: Wed, 19 Feb 2025 14:20:53 +0300

On Tue, Feb 18, 2025 at 05:44:15PM +0000, Pip Cet wrote:
> Evgeniy,, could you try replacing the definition of
> flush_stack_call_func in lisp.h by this definition, and recompiling?
> 
> INLINE void
> flush_stack_call_func (void (*func) (void *arg), void *arg)
> {
>   volatile bool repeat = true;
>   while (repeat)
>     {
>       __builtin_unwind_init ();
>       asm volatile ("" : : : "memory");
>       flush_stack_call_func1 (func, arg);
>       repeat = false;
>     }
> }
> 


I tried this fix.
It doesn't help :(

New crash dump looks the same to previous (I rebuilt without --enable-checking=all):

(gdb) bt
#0  __pthread_kill_implementation (threadid=<optimized out>, signo=signo <at> entry=11, no_tid=no_tid <at> entry=0) at pthread_kill.c:44
#1  0x000077717feb96d3 in __pthread_kill_internal (threadid=<optimized out>, signo=11) at pthread_kill.c:89
#2  0x000077717fe5fba0 in __GI_raise (sig=sig <at> entry=11) at ../sysdeps/posix/raise.c:26
#3  0x00005e89a9d6e7ca in terminate_due_to_signal (sig=sig <at> entry=11, backtrace_limit=backtrace_limit <at> entry=40) at emacs.c:464
#4  0x00005e89a9d6f092 in handle_fatal_signal (sig=sig <at> entry=11) at sysdep.c:1783
#5  0x00005e89a9d6f099 in deliver_thread_signal (sig=sig <at> entry=11, handler=0x5e89a9d6f07f <handle_fatal_signal>) at sysdep.c:1775
#6  0x00005e89a9ee0341 in deliver_fatal_thread_signal (sig=11) at sysdep.c:1795
#7  handle_sigsegv (sig=11, siginfo=<optimized out>, arg=<optimized out>) at sysdep.c:1888
#8  0x000077717fe5fcd0 in <signal handler called> () at /usr/lib/libc.so.6
#9  SYMBOL_NAME (sym=0x5e89b479fc10) at /usr/src/debug/emacs/emacs-29.4/src/lisp.h:1152
#10 print_object (obj=0x5e89b479fc10, printcharfun=<optimized out>, escapeflag=true) at print.c:2398
#11 0x00005e89a9f8618d in print (obj=<optimized out>, printcharfun=<optimized out>, escapeflag=<optimized out>) at print.c:1301
#12 0x00005e89a9f862d3 in Fprin1 (object=0x5e89b479fc10, printcharfun=printcharfun <at> entry=0x30, overrides=overrides <at> entry=0x0) at print.c:776
#13 0x00005e89a9f86af9 in print_error_message (data=<optimized out>, data <at> entry=0x5e89c039cbd3, stream=stream <at> entry=0x30, context=<optimized out>, caller=caller <at> entry=0x7fe0) at print.c:1134
#14 0x00005e89a9ec503b in Fcommand_error_default_function (data=0x5e89c039cbd3, context=0x77717bc80284, signal=0x7fe0) at /usr/src/debug/emacs/emacs-29.4/src/lisp.h:1679
#15 0x00005e89a9fabd6c in exec_byte_code (fun=<optimized out>, args_template=<optimized out>, nargs=<optimized out>, args=<optimized out>) at bytecode.c:809
#16 0x00005e89a9f5e0c5 in Ffuncall (nargs=nargs <at> entry=4, args=args <at> entry=0x7ffc97562ab0) at eval.c:2999
#17 0x00005e89a9ec591e in call3 (fn=<optimized out>, arg1=0x5e89c039cbd3, arg2=<optimized out>, arg3=0x7fe0) at /usr/src/debug/emacs/emacs-29.4/src/lisp.h:3262
#18 cmd_error_internal (data=data <at> entry=0x5e89c039cbd3, context=context <at> entry=0x7ffc97562b20 "") at keyboard.c:1013
#19 0x00005e89a9ec5aa2 in cmd_error (data=0x5e89c039cbd3) at keyboard.c:981
#20 0x00005e89a9f58771 in internal_condition_case (bfun=bfun <at> entry=0x5e89a9ed3360 <command_loop_1>, handlers=handlers <at> entry=0x90, hfun=hfun <at> entry=0x5e89a9ec5950 <cmd_error>) at eval.c:1470
#21 0x00005e89a9ebd73f in command_loop_2 (handlers=handlers <at> entry=0x90) at keyboard.c:1133
#22 0x00005e89a9f586d8 in internal_catch (tag=tag <at> entry=0x10080, func=func <at> entry=0x5e89a9ebd700 <command_loop_2>, arg=arg <at> entry=0x90) at eval.c:1197
#23 0x00005e89a9ebd6c5 in command_loop () at keyboard.c:1111
#24 0x00005e89a9ec5461 in recursive_edit_1 () at keyboard.c:720
#25 0x00005e89a9ec583d in Frecursive_edit () at keyboard.c:803
#26 0x00005e89a9d7d0e6 in main (argc=1, argv=0x7ffc97562f38) at emacs.c:2521


(gdb) li 4227

4229	INLINE void
4230	flush_stack_call_func (void (*func) (void *arg), void *arg)
4231	{
4232	  volatile bool repeat = true;
4233	  while (repeat)
4234	    {
4235	      __builtin_unwind_init ();
4236	      asm volatile ("" : : : "memory");
4237	      flush_stack_call_func1 (func, arg);
4238	      repeat = false;
4239	    }
4240	}



-- 
/Evgeniy

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