Use memory map cache in debugging code #656
Merge remote-tracking branch 'passimm/master'
Share the syscallbuf shmem file through /proc/fd.
Move buffer-init code into Task.
Move buffer-destruction code into Task, where we want it for other uses.
checkpoint
checkpoint
checkpoint; code written down
checkpoint; compiling
checkpoint; works up to syscallbuf usage
checkpoint; syscallbuf working