SIGUSR1 stack print mechanism fails during logout
Since GemStone/S 6.0, sending "kill -16" (SIGUSR1) to a topaz/gem process
will cause that process to print its smalltalk stack to stdout. On Solaris,
this feature has been extended to also print the C-level stack to stdout.
But when the topaz/gem process is logging out, using this mechanism can
cause a core dump, preceeded by the warning message:
PomOtGetSharedObjPage: root not loaded
Don't use the SIGUSR1 signal on a gem/topaz process when it's logging out.