acme freezes on macOS Sonoma

[Alexander Kapshuk]

Since updating to macOS Sonoma acme's been freezing for me within
minutes of being launched.

I'm seeing the following error messages recorded in the system log for
what appears to be all plan9 port binaries:
2023-12-19 09:54:08.669298+0200 0x416fe Default 0x0
0 0 kernel: (AppleMobileFileIntegrity) AMFI:
'/Users/*/plan9/bin/acme' has no CMS blob?
2023-12-19 09:54:08.669314+0200 0x416fe Default 0x0
0 0 kernel: (AppleMobileFileIntegrity) AMFI:
'/Users/*/plan9/bin/acme': Unrecoverable CT signature issue, bailing
out.
2023-12-19 09:54:08.669318+0200 0x416fe Default 0x0
0 0 kernel: (AppleMobileFileIntegrity) AMFI: code
signature validation failed.
2023-12-19 09:54:08.673680+0200 0x41377 Default 0x0
509 0 syspolicyd: (Security)
[com.apple.securityd:security_exception] MacOS error: -67062
2023-12-19 09:54:08.684379+0200 0x41377 Default 0x0
509 0 syspolicyd: (Security)
[com.apple.securityd:security_exception] MacOS error: -67062
2023-12-19 09:54:08.685583+0200 0x41377 Error 0x0
509 0 syspolicyd: [com.apple.syspolicy:default] Unable to
get certificates array: (null)

% sw_vers
ProductName: macOS
ProductVersion: 14.2
BuildVersion: 23C64

Any pointers on how to further debug this would be much appreciated.

[Alexander Kapshuk]

I'm no longer experiencing the issue above after upgrading to 14.2.1.
Go figure. :)

[Alexander Kapshuk]

Apparently, acme still froze for me at the end of the day.
Attaching to both PIDs belonging to acme with lldb and running 'bt'
revealed that both processes were sleeping.

% ps acx | grep acme
1758 s000 SN 0:00.68 acme
1759 s000 SN 0:11.53 acme

(lldb) process attach --pid 1758
Executable module set to "/Users/sasha/plan9/bin/acme".
Architecture set to: arm64-apple-macosx-.

(lldb) bt
* thread #1, queue = 'com.apple.main-thread', stop reason = signal SIGSTOP
* frame #0: 0x0000000180bf106c libsystem_kernel.dylib`__psynch_cvwait + 8
frame #1: 0x0000000180c2e5fc
libsystem_pthread.dylib`_pthread_cond_wait + 1228
frame #2: 0x00000001049c9a54 acme`_procsleep(r=0x0000000138004c90)
at pthread.c:60:5 [opt]
frame #3: 0x00000001049ca4c4 acme`_threadswitch [inlined]
pthreadsleepschedlocked(p=0x00000001380047c0, t=0x0000000138004a20) at
thread.c:277:3 [opt]
frame #4: 0x00000001049ca490 acme`_threadswitch [inlined]
pthreadscheduler(p=0x00000001380047c0) at thread.c:310:4 [opt]
frame #5: 0x00000001049ca2b8 acme`_threadswitch at thread.c:143:2 [opt]
frame #6: 0x00000001049c7ef4 acme`chanalt(a=0x000000016b46b458) at
channel.c:306:2 [opt]
frame #7: 0x00000001049c843c acme`chanrecvul [inlined]
_chanop(c=<unavailable>, op=2, p=0x000000016b46b450, canblock=1) at
channel.c:326:5 [opt]
frame #8: 0x00000001049c8428 acme`chanrecvul(c=<unavailable>) at
channel.c:398:5 [opt]
frame #9: 0x0000000104995dc4 acme`threadmain + 2404
frame #10: 0x00000001049ca21c acme`procmain(p=0x00000001380047c0)
at thread.c:254:2 [opt]
frame #11: 0x00000001049cad9c acme`p9main(argc=<unavailable>,
argv=<unavailable>) at thread.c:761:2 [opt]
frame #12: 0x00000001049d0ec8 acme`main(argc=<unavailable>,
argv=<unavailable>) at main.c:10:2 [opt]
frame #13: 0x00000001808ad0e0 dyld`start + 2360

(lldb) process attach --pid 1759
Executable module set to "/Users/sasha/plan9/bin/devdraw".
Architecture set to: arm64-apple-macosx-.

(lldb) bt
* thread #1, queue = 'com.apple.main-thread', stop reason = signal SIGSTOP
* frame #0: 0x0000000180bed874 libsystem_kernel.dylib`mach_msg2_trap + 8
frame #1: 0x0000000180bffcf0 libsystem_kernel.dylib`mach_msg2_internal + 80
frame #2: 0x0000000180bf64b0 libsystem_kernel.dylib`mach_msg_overwrite + 476
frame #3: 0x0000000180bedbf8 libsystem_kernel.dylib`mach_msg + 24
frame #4: 0x0000000180d0bbf4 CoreFoundation`__CFRunLoopServiceMachPort + 160
frame #5: 0x0000000180d0a4bc CoreFoundation`__CFRunLoopRun + 1208
frame #6: 0x0000000180d099ac CoreFoundation`CFRunLoopRunSpecific + 608
frame #7: 0x000000018b2b8448 HIToolbox`RunCurrentEventLoopInMode + 292
frame #8: 0x000000018b2b8284 HIToolbox`ReceiveNextEventCommon + 648
frame #9: 0x000000018b2b7fdc
HIToolbox`_BlockUntilNextEventMatchingListInModeWithFilter + 76
frame #10: 0x00000001844e68a4 AppKit`_DPSNextEvent + 660
frame #11: 0x0000000184cc0980
AppKit`-[NSApplication(NSEventRouting)
_nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 716
frame #12: 0x00000001844d9d50 AppKit`-[NSApplication run] + 476
frame #13: 0x00000001001cacf8 devdraw`gfx_main + 480
frame #14: 0x00000001001c9b2c devdraw`threadmain + 480
frame #15: 0x00000001001d9a38
devdraw`procmain(p=0x0000000152e05260) at thread.c:254:2 [opt]
frame #16: 0x00000001001da5b8 devdraw`p9main(argc=<unavailable>,
argv=<unavailable>) at thread.c:761:2 [opt]
frame #17: 0x00000001001dcc10 devdraw`main(argc=<unavailable>,
argv=<unavailable>) at main.c:10:2 [opt]
frame #18: 0x00000001808ad0e0 dyld`start + 2360

Sam continues to work though.
Any tips on how to debug this further would be much appreciated.