https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94527
Bug ID: 94527
Summary: RFE: Add an __attribute__ that marks a function as
freeing an object
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: dhowells at redhat dot com
Target Milestone: ---
Would it be possible to add a function attribute to indicate that the function
is going to destroy the object a the parameter points to (ie. a free()-like
function)? Perhaps something like:
void free(const volatile void *ptr) __attribute__((free(1)));
where the free(N) attribute indicates the parameter number[*].
[*] Note that it's possible that a free()-like function might also take
additional parameters to provide context and that context won't be destroyed.
The compiler could then warn upon future access through the pointer.
