mef20@makoto 21:03:46/250127(..wip/wsjtx)% \
sudo  dtrace -n 'sdt:::set-error /(execname == "wsjtx" || execname == "ktrace") && \
arg0 == 12/ { @[stack()] = count() }' -c "ktrace  wsjtx"

dtrace: description 'sdt:::set-error ' matched 1 probe
ktrace: exec of 'wsjtx' failed: Cannot allocate memory
dtrace: pid 13721 exited with status 1

mef20@makoto 21:03:58/250127(..wip/wsjtx)% ls -lt |head
total 56
-rw-r--r--  1 root    wheel  3644 Jan 27 21:03 ktrace.out
-rw-r--r--  1 makoto  wheel  3281 Jan 27 11:38 Makefile
-rw-r--r--  1 makoto  wheel  1410 Jan 27 08:06 TODO
-rw-r--r--  1 makoto  wheel  1015 Jan 26 07:07 PLIST
drwxr-xr-x  2 makoto  wheel   512 Jan 25 00:43 patches
-rw-r--r--  1 makoto  wheel   766 Jan 25 00:43 distinfo
-rw-r--r--  1 makoto  wheel   813 Jan  9 19:24 DESCR
mef20@makoto 21:05:51/250127(..wip/wsjtx)% kdump ktrace.out
 13721  13721 ktrace   EMUL  "netbsd"
 13721  13721 ktrace   CALL  execve(0x7f7fff260df0,0x7f7fff2612f0,0x7f7fff261300)
 13721  13721 ktrace   NAMI  "/usr/X11R7/bin/wsjtx"
 13721  13721 ktrace   RET   execve -1 errno 2 No such file or directory
 13721  13721 ktrace   CALL  execve(0x7f7fff260df0,0x7f7fff2612f0,0x7f7fff261300)
 13721  13721 ktrace   NAMI  "/usr/pkg/bin/wsjtx"
 13721  13721 ktrace   NAMI  "/usr/libexec/ld.elf_so"
 13721  13721 ktrace   RET   execve -1 errno 12 Cannot allocate memory
 13721  13721 ktrace   CALL  write(2,0x7f7fff260b90,8)
 13721  13721 ktrace   GIO   fd 2 wrote 8 bytes
       "ktrace: "
 13721  13721 ktrace   RET   write 8
 13721  13721 ktrace   CALL  write(2,0x7f7fff260c70,0x16)
 13721  13721 ktrace   GIO   fd 2 wrote 22 bytes
       "exec of 'wsjtx' failed"
 13721  13721 ktrace   RET   write 22/0x16
 13721  13721 ktrace   CALL  write(2,0x71982cd05a4d,2)
 13721  13721 ktrace   GIO   fd 2 wrote 2 bytes
       ": "
 13721  13721 ktrace   RET   write 2
 13721  13721 ktrace   CALL  mmap(0,0x1000,PROT_READ|PROT_WRITE,0x1002<PRIVATE,ANONYMOUS,ALIGN=NONE>,0xffffffff,0,0)
 13721  13721 ktrace   RET   mmap 124898398920704/0x71982cb36000
 13721  13721 ktrace   CALL  mmap(0,0x1000,PROT_READ|PROT_WRITE,0x1002<PRIVATE,ANONYMOUS,ALIGN=NONE>,0xffffffff,0,0)
 13721  13721 ktrace   RET   mmap 124898398916608/0x71982cb35000
 13721  13721 ktrace   CALL  mmap(0,0x1000,PROT_READ|PROT_WRITE,0x1002<PRIVATE,ANONYMOUS,ALIGN=NONE>,0xffffffff,0,0)
 13721  13721 ktrace   RET   mmap 124898398912512/0x71982cb34000
 13721  13721 ktrace   CALL  mmap(0,0x1000,PROT_READ|PROT_WRITE,0x1002<PRIVATE,ANONYMOUS,ALIGN=NONE>,0xffffffff,0,0)
 13721  13721 ktrace   RET   mmap 124898398908416/0x71982cb33000
 13721  13721 ktrace   CALL  mmap(0,0x1000,PROT_READ|PROT_WRITE,0x1002<PRIVATE,ANONYMOUS,ALIGN=NONE>,0xffffffff,0,0)
 13721  13721 ktrace   RET   mmap 124898398904320/0x71982cb32000
 13721  13721 ktrace   CALL  write(2,0x7f7fff260b90,0x17)
 13721  13721 ktrace   GIO   fd 2 wrote 23 bytes
       "Cannot allocate memory\n"
 13721  13721 ktrace   RET   write 23/0x17
 13721  13721 ktrace   CALL  _lwp_self
 13721  13721 ktrace   RET   _lwp_self 13721/0x3599
 13721  13721 ktrace   CALL  __sigprocmask14(1,0x7f7fff261000,0x7f7fff261040)
 13721  13721 ktrace   RET   __sigprocmask14 0
 13721  13721 ktrace   CALL  __sigprocmask14(3,0x7f7fff261040,0)
 13721  13721 ktrace   RET   __sigprocmask14 0
 13721  13721 ktrace   CALL  _lwp_self
 13721  13721 ktrace   RET   _lwp_self 13721/0x3599
 13721  13721 ktrace   CALL  __sigprocmask14(1,0x7f7fff260fd0,0x7f7fff261040)
 13721  13721 ktrace   RET   __sigprocmask14 0
 13721  13721 ktrace   CALL  __sigprocmask14(3,0x7f7fff261040,0)
 13721  13721 ktrace   RET   __sigprocmask14 0
 13721  13721 ktrace   CALL  exit(1)