bug#60220: 29.0.60; macOS 13.1 crash shortly after starting Emacs

[Gerd Möllmann]

Can’t say anything useful with regard to these logs I’m afraid. 

Sent from my iPhone

> On 23. Dec 2022, at 03:22, Aaron Jensen <aaronjensen@gmail.com> wrote:
> 
> On Thu, Dec 22, 2022 at 9:06 PM Paul Eggert <eggert@cs.ucla.edu> wrote:
>> 
>>> On 12/22/22 00:18, Eli Zaretskii wrote:
>>> Paul, could you perhaps audit the code which implements restart-emacs,
>>> and see if we need to make it safer, in particular wrt signals and
>>> *.eln files loaded via dynlib.
>> 
>> I don't offhand see why anything would need to be done other than turn
>> off timer signals to the execed process. Something like the attached
>> patch, perhaps. Aaron, could you give it a try?
> 
> Thank you, this certainly changes things. I don't get the sig 14
> anymore in the debugger and it successfully restarts every time while
> in the debugger. I will try using it for a while and see how that
> goes.
> 
> I don't know if this is significant or not, but when I restart an
> Emacs run from the terminal, or in the debugger, I see "Task policy
> set failed: 4 ((os/kern) invalid argument)" printed to stderr.
> 
> (lldb) process launch
> Process 13113 launched: 'src/emacs' (arm64)
> Process 13113 stopped
> * thread #8, stop reason = exec
>    frame #0: 0x0000000100934950 dyld`_dyld_start
> dyld`:
> ->  0x100934950 <+0>:  mov    x0, sp
>    0x100934954 <+4>:  and    sp, x0, #0xfffffffffffffff0
>    0x100934958 <+8>:  mov    x29, #0x0
>    0x10093495c <+12>: mov    x30, #0x0
> Target 0: (emacs) stopped.
> (lldb) thread list
> Process 13113 stopped
> * thread #8: tid = 0x37d5ee, 0x0000000100934950 dyld`_dyld_start, stop
> reason = exec
> (lldb) continue
> Process 13113 resuming
> 2022-12-22 21:09:48.439039-0500 emacs[13113:3659246] [assertion] Error
> acquiring assertion: <Error Domain=RBSAssertionErrorDomain Code=2
> "Specified target process does not exist"
> UserInfo={NSLocalizedFailureReason=Specified target process does not
> exist}>
> 2022-12-22 21:09:48.439086-0500 emacs[13113:3659246] [process] Failed
> to acquire AppNap adapter assertion with error Error
> Domain=RBSAssertionErrorDomain Code=2 "Specified target process does
> not exist" UserInfo={NSLocalizedFailureReason=Specified target process
> does not exist}
> 2022-12-22 21:09:48.439102-0500 emacs[13113:3659246] Task policy set
> failed: 4 ((os/kern) invalid argument)