pgsql/src/backend/tcop (postgres.c)

Date: Sunday, April 30, 2000 @ 17:29:23
Author: tgl

Update of /usr/local/cvsroot/pgsql/src/backend/tcop
from hub.org:/home/tmp/cvs-serv8947

Modified Files:
postgres.c

----------------------------- Log Message -----------------------------

Reset CurrentMemoryContext to TopMemoryContext at the beginning of error
cleanup, ie, as soon as we have caught the longjmp. This ensures that
current context will be a valid context throughout error cleanup. Before
it was possible that current context was pointing at a context that would
get deleted during cleanup, leaving any subsequent pallocs in deep
trouble. I was able to provoke an Assert failure when compiled with
asserts + -DCLOBBER_FREED_MEMORY, if I did something that would cause
an error to be reported by the backend large-object code, because indeed
that code operates in a context that gets deleted partway through xact
abort --- and CurrentMemoryContext was still pointing at it! Boo hiss.