Following Jeff's advice, I have rebuilt open-mpi by hand using the -g
option. This shows more information as below. I am attempting George's
advice of how to track the child but notice that gdb does not support
arm64. attempting to update lldb.
scottsayres@scotts-mbp openmpi-4.1.3 % lldb mpirun -- -np 1 hostname
(lldb) target create "mpirun"
Current executable set to 'mpirun' (arm64).
(lldb) settings set -- target.run-args "-np" "1" "hostname"
(lldb) run
Process 90950 launched: '/usr/local/bin/mpirun' (arm64)
Process 90950 stopped
* thread #1, queue = 'com.apple.main-thread', stop reason = signal SIGSTOP
frame #0: 0x00000001bde25654 libsystem_kernel.dylib`read + 8
libsystem_kernel.dylib`read:
-> 0x1bde25654 <+8>: b.lo 0x1bde25674 ; <+40>
0x1bde25658 <+12>: pacibsp
0x1bde2565c <+16>: stp x29, x30, [sp, #-0x10]!
0x1bde25660 <+20>: mov x29, sp
Target 0: (mpirun) stopped.
(lldb) ^C
(lldb) thread backtrace
* thread #1, queue = 'com.apple.main-thread', stop reason = signal SIGSTOP
* frame #0: 0x00000001bde25654 libsystem_kernel.dylib`read + 8
frame #1: 0x000000010056169c libopen-pal.40.dylib`opal_fd_read(fd=27,
len=20, buffer=0x000000016fdfe90c) at fd.c:51:14
frame #2: 0x00000001027b3388
mca_odls_default.so`do_parent(cd=0x0000600003e00000, read_fd=27) at
odls_default_module.c:495:14
frame #3: 0x00000001027b2d90
mca_odls_default.so`odls_default_fork_local_proc(cdptr=0x0000600003e00000)
at odls_default_module.c:651:12
frame #4: 0x00000001003246f8
libopen-rte.40.dylib`orte_odls_base_spawn_proc(fd=-1, sd=4,
cbdata=0x0000600003e00000) at odls_base_default_fns.c:1046:31
frame #5: 0x000000010057a7a0
libopen-pal.40.dylib`opal_libevent2022_event_base_loop [inlined]
event_process_active_single_queue(base=0x00000001007061c0) at event.c:1370:4
[opt]
frame #6: 0x000000010057a628
libopen-pal.40.dylib`opal_libevent2022_event_base_loop [inlined]
event_process_active(base=0x00000001007061c0) at event.c:1440:8 [opt]
frame #7: 0x000000010057a5ec
libopen-pal.40.dylib`opal_libevent2022_event_base_loop(base=0x00000001007061c0,
flags=<unavailable>) at event.c:1644:12 [opt]
frame #8: 0x0000000100003b04 mpirun`orterun(argc=4,
argv=0x000000016fdff268) at orterun.c:179:9
frame #9: 0x0000000100003904 mpirun`main(argc=4,
argv=0x000000016fdff268) at main.c:13:12
frame #10: 0x0000000100015088 dyld`start + 516
