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not-cancel.h: Support testing fortify build with Clang 

When Clang is used to test fortify glibc build configured with

--enable-fortify-source=N

clang issues errors like

In file included from tst-rfc3484.c:60:
In file included from ./getaddrinfo.c:81:
../sysdeps/unix/sysv/linux/not-cancel.h:36:10: error: reference to overloaded function could not be resolved; did you mean to call it?
   36 | __typeof (open64) __open64_nocancel;
      |          ^~~~~~~~
../include/bits/../../io/bits/fcntl2.h:127:1: note: possible target for call
  127 | open64 (__fortify_clang_overload_arg (const char *, ,__path), int __oflag,
      | ^
../include/bits/../../io/bits/fcntl2.h:118:1: note: possible target for call
  118 | open64 (__fortify_clang_overload_arg (const char *, ,__path), int __oflag)
      | ^
../include/bits/../../io/bits/fcntl2.h:114:1: note: possible target for call
  114 | open64 (const char *__path, int __oflag, mode_t __mode, ...)
      | ^
../io/fcntl.h:219:12: note: possible target for call
  219 | extern int open64 (const char *__file, int __oflag, ...) __nonnull ((1));
      |            ^

because clang fortify support for functions with variable arguments relies
on function overload.  Update not-cancel.h to avoid __typeof on functions
with variable arguments.

Co-Authored-By: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Signed-off-by: H.J. Lu <hjl.tools@gmail.com>
Reviewed-by: Sam James <sam@gentoo.org>
This commit is contained in:
H.J. Lu 2025-01-02 07:22:36 +08:00
parent dbc9a40007
commit ed97ef7a4b
1 changed files with 5 additions and 5 deletions
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10
sysdeps/unix/sysv/linux/not-cancel.h
View File

@ -30,16 +30,16 @@
#include <sys/random.h>
/* Non cancellable open syscall. */
__typeof (open) __open_nocancel;
extern int __open_nocancel (const char *, int, ...);
/* Non cancellable open syscall (LFS version). */
__typeof (open64) __open64_nocancel;
extern int __open64_nocancel (const char *, int, ...);
/* Non cancellable openat syscall. */
__typeof (openat) __openat_nocancel;
extern int __openat_nocancel (int fd, const char *, int, ...);
/* Non cacellable openat syscall (LFS version). */
__typeof (openat64) __openat64_nocancel;
extern int __openat64_nocancel (int fd, const char *, int, ...);
/* Non cancellable read syscall. */
__typeof (__read) __read_nocancel;
@ -54,7 +54,7 @@ __typeof (__write) __write_nocancel;
__typeof (__close) __close_nocancel;
/* Uncancelable fcntl. */
__typeof (__fcntl) __fcntl64_nocancel;
int __fcntl64_nocancel (int, int, ...);
#if IS_IN (libc) || IS_IN (rtld)
hidden_proto (__open_nocancel)