[Bug c/41142] New: make implicit pointer conversions an error when sizeof(int) != sizeof(void *)

[Bug c/41142] New: make implicit pointer conversions an error when sizeof(int) != sizeof(void *)

[dannf at dannf dot org]

Implicit pointer conversions on ia64 are guaranteed to result in a segfault if
the value is dereferenced. This issue can be easily identified by looking for a
combination of gcc warnings. In fact, I have been running all of the build logs
or the Debian distribution through a script that scans for this issue for
several years, and it has caught hundreds of these problems:

http://bugs.debian.org/cgi-bin/pkgreport.cgi?users=dannf@debian.org;which=tag&data=implicit-pointer-conversion&archive=no

script here: http://people.debian.org/~dannf/check-implicit-pointer-functions

I don't know anything about gcc internals, but I'm wondering if it is possible
to generate an error when the appropriate combination of warning conditions is
present?


-- 
           Summary: make implicit pointer conversions an error when
                    sizeof(int) != sizeof(void *)
           Product: gcc
           Version: 4.3.4
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: dannf at dannf dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41142

[Bug c/41142] make implicit pointer conversions an error when sizeof(int) != sizeof(void *)

[redi at gcc dot gnu dot org]

------- Comment #1 from redi at gcc dot gnu dot org  2009-08-21 17:03 -------
-Werror=int-to-pointer-cast will make one class of warnings into errors, but I
don't think there's a switch to handle the other cases your script detects.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41142