Fix (some of) pltcl memory usage
As reported by Bill Parker, PL/Tcl did not validate some malloc() calls
against NULL return. Fix by using palloc() in a new long-lived memory
context instead. This allows us to simplify error handling too, by
simply deleting the memory context instead of doing retail frees.
There's still a lot that could be done to improve PL/Tcl's memory
handling ...
This is pretty ancient, so backpatch all the way back.
Author: Michael Paquier and Álvaro Herrera
Discussion: https://www.postgresql.org/message-id/CAFrbyQwyLDYXfBOhPfoBGqnvuZO_Y90YgqFM11T2jvnxjLFmqw@mail.gmail.com
Branch
------
REL9_1_STABLE
Details
-------
http://git.postgresql.org/pg/commitdiff/14ade020ffa805b8335af10a11520b7b2249c99e
Modified Files
--------------
src/pl/tcl/pltcl.c | 27 ++++++++++++++++++---------
1 file changed, 18 insertions(+), 9 deletions(-)
