- Add wrappers for PHYSFS_read and its convenience functions. Poison
the memory before calling PHYSFS, so that any uninitialized bytes
(likely caused by a short read) are reported if the caller tries to
access the value anyway.
- Add SConstruct options to enable wrapping, so that users do not need
to enumerate the wrapped functions manually.
- Fix link failure when using LTO+wrappers.
PCH mode causes the Valgrind-wrapper header to be included in places
it is not meant to be used, which leads to spurious compiler errors.
PCH mode causes the Valgrind-wrapper __real_* stub functions to see
the physfsx.h PHYSFS macros, which also causes errors.
Fortunately, both cases can be easily fixed.
Add preprocessor guards to the Valgrind-wrapper header to cause it to
compile out when the PCH phase runs. It has no include guard, so it
will be rescanned with the proper macros when the two consuming files
are built normally.
Modify the Valgrind-wrapper __real_* stub functions to use
the standard macro avoidance trick so that they do not call the
physfsx.h PHYSFS macros.
Clang rejects a declared (but never defined and never used) `static`
function. Change the declaration to be the value of a macro that will
be expanded only when the function is both defined and used.
Reported-by: kreatordxx <https://github.com/dxx-rebirth/dxx-rebirth/issues/295>
Fixes: 55822d0b4d ("Add wrappers for more precise Valgrind physfs diagnostics")
