This is the mail archive of the
libc-alpha@sourceware.org
mailing list for the glibc project.
Re: [PATCH] Set behavior of sprintf-like functions with overlapping source and destination
On Thu, 27 Dec 2018, Siddhesh Poyarekar wrote:
> With this action plan we don't really need to test the undefined behaviour
> since we don't intend to retain it except in the compat case, just flip the
Compat symbol semantics should be tested in the testsuite (with
appropriate TEST_COMPAT conditionals and use of compat_symbol_reference).
(There are exceptional cases where the new symbol's semantics are a
refinement of the old and so the two symbol versions alias each other and
no separate test of the old version is useful, but a new version is added
to stop new binaries working with old libc - e.g. when some fenv.h
functions changed from void to int return type following C99TC1 - but the
normal case is that the compat symbols should be tested to ensure they
keep working as expected.)
--
Joseph S. Myers
joseph@codesourcery.com