[ http://issues.apache.org/jira/browse/AXIS2C-252?page=all ]
Samisa Abeysinghe updated AXIS2C-252:
-------------------------------------
Fix Version/s: 1.0.0
> Use __attribute__ ((warn_unused_result)) to detect failure to check function
> return values
> ------------------------------------------------------------------------------------------
>
> Key: AXIS2C-252
> URL: http://issues.apache.org/jira/browse/AXIS2C-252
> Project: Axis2-C
> Issue Type: Bug
> Affects Versions: Current (Nightly)
> Reporter: James Clark
> Fix For: 1.0.0
>
>
> I've noticed several cases where the return values of functions which should
> be checked aren't being checked. Things should be set up so that these cases
> can be detected automatically. I think the way to do this is to leverage
> gcc's warn_unused_result attribute. Here's the relevant excerpt from the gcc
> manual:
> `warn_unused_result'
> The `warn_unused_result' attribute causes a warning to be emitted
> if a caller of the function with this attribute does not use its
> return value. This is useful for functions where not checking the
> result is either a security problem or always a bug, such as
> `realloc'.
> int fn () __attribute__ ((warn_unused_result));
> int foo ()
> {
> if (fn () < 0) return -1;
> fn ();
> return 0;
> }
> results in warning on line 5.
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