JOB_STACKFRAME_NULL stackframes in context will look as follows:
job_RunState.l -> size in bytes of below stackframe JOB_STACKFRAME_NULL junk size in bytes of above stackframe size in bytes of below stackframe JOB_STACKFRAME_NORMAL local_variable_N ... local_variable_1 job_RunState.v -> local_variable_0 compiledFunction for this frame. programCounter for this frame. size in bytes of above stackframe
When we fork, we want only the parent to hold the lock. (This is the unix tradition.) So we convert all LOCK frames held by the child into NULL frames. These frames are ignored except that when trying to pop a LOCK frame, a NULL frame will be accepted as a substitute.
getStackframe[ NULL frame result looks like:
:owner object :kind nil
Go to the first, previous, next, last section, table of contents.