https://bugs.exim.org/show_bug.cgi?id=2256
Bug ID: 2256
Summary: Need class grouping of variables
Product: Exim
Version: 4.90
Hardware: All
OS: All
Status: NEW
Severity: wishlist
Priority: medium
Component: String expansion
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
It's unwieldy and fragile keeping track of which variables are live
where. This has been a source of some bugs, where use of a non-live variable
does a use-after-free access because the (global) pointer was not nulled out.
The debug_store option enables checks for these, but hits depend on the actual
config being exercised.
A high-level view of one possible direction to deal better with this:
some means of labelling or otherwise grouping variables, so that defined
code locations could just wipe all variables of a class. Then when new
variables were created (with correct labelling...) the transitions to non-live
would get done as a matter of course.
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