[glibc] Mark various cold functions as __COLD

[glibc] Mark various cold functions as __COLD

[Samuel Thibault]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=e6a252758cbadb13654e66e1f2445ef6f8a4dea0

commit e6a252758cbadb13654e66e1f2445ef6f8a4dea0
Author: Sergey Bugaev <bugaevc@gmail.com>
Date:   Sat Apr 29 16:12:23 2023 +0300

    Mark various cold functions as __COLD
    
    GCC docs explicitly list perror () as a good candidate for using
    __attribute__ ((cold)). So apply __COLD to perror () and similar
    functions.
    
    Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
    Signed-off-by: Sergey Bugaev <bugaevc@gmail.com>
    Message-Id: <20230429131223.2507236-3-bugaevc@gmail.com>

Diff:
---
 include/error.h |  4 ++--
 libio/stdio.h   |  2 +-
 misc/err.h      | 12 ++++++------
 misc/error.h    |  4 ++--
 4 files changed, 11 insertions(+), 11 deletions(-)

diff --git a/include/error.h b/include/error.h
index 9e96262fc5..4db67cba90 100644
--- a/include/error.h
+++ b/include/error.h
@@ -5,11 +5,11 @@
 
 void
 __error_internal (int status, int errnum, const char *message,
-		  va_list args, unsigned int mode_flags);
+		  va_list args, unsigned int mode_flags) __COLD;
 
 void
 __error_at_line_internal (int status, int errnum, const char *file_name,
 			  unsigned int line_number, const char *message,
-			  va_list args, unsigned int mode_flags);
+			  va_list args, unsigned int mode_flags) __COLD;
 
 #endif
diff --git a/libio/stdio.h b/libio/stdio.h
index 45ddafdf20..2387590d6a 100644
--- a/libio/stdio.h
+++ b/libio/stdio.h
@@ -859,7 +859,7 @@ extern int ferror_unlocked (FILE *__stream) __THROW __wur;
 
    This function is a possible cancellation point and therefore not
    marked with __THROW.  */
-extern void perror (const char *__s);
+extern void perror (const char *__s) __COLD;
 
 
 #ifdef	__USE_POSIX
diff --git a/misc/err.h b/misc/err.h
index 0c752465ee..43df3a571b 100644
--- a/misc/err.h
+++ b/misc/err.h
@@ -32,9 +32,9 @@ __BEGIN_DECLS
 /* Print "program: ", FORMAT, ": ", the standard error string for errno,
    and a newline, on stderr.  */
 extern void warn (const char *__format, ...)
-     __attribute__ ((__format__ (__printf__, 1, 2)));
+     __attribute__ ((__format__ (__printf__, 1, 2))) __COLD;
 extern void vwarn (const char *__format, __gnuc_va_list)
-     __attribute__ ((__format__ (__printf__, 1, 0)));
+     __attribute__ ((__format__ (__printf__, 1, 0))) __COLD;
 
 /* Likewise, but without ": " and the standard error string.  */
 extern void warnx (const char *__format, ...)
@@ -44,13 +44,13 @@ extern void vwarnx (const char *__format, __gnuc_va_list)
 
 /* Likewise, and then exit with STATUS.  */
 extern void err (int __status, const char *__format, ...)
-     __attribute__ ((__noreturn__, __format__ (__printf__, 2, 3)));
+     __attribute__ ((__noreturn__, __format__ (__printf__, 2, 3))) __COLD;
 extern void verr (int __status, const char *__format, __gnuc_va_list)
-     __attribute__ ((__noreturn__, __format__ (__printf__, 2, 0)));
+     __attribute__ ((__noreturn__, __format__ (__printf__, 2, 0))) __COLD;
 extern void errx (int __status, const char *__format, ...)
-     __attribute__ ((__noreturn__, __format__ (__printf__, 2, 3)));
+     __attribute__ ((__noreturn__, __format__ (__printf__, 2, 3))) __COLD;
 extern void verrx (int __status, const char *, __gnuc_va_list)
-     __attribute__ ((__noreturn__, __format__ (__printf__, 2, 0)));
+     __attribute__ ((__noreturn__, __format__ (__printf__, 2, 0))) __COLD;
 
 #include <bits/floatn.h>
 #if defined __LDBL_COMPAT || __LDOUBLE_REDIRECTS_TO_FLOAT128_ABI == 1
diff --git a/misc/error.h b/misc/error.h
index 185b39c641..4fbd46c775 100644
--- a/misc/error.h
+++ b/misc/error.h
@@ -29,11 +29,11 @@ __BEGIN_DECLS
    If STATUS is nonzero, terminate the program with `exit (STATUS)'.  */
 
 extern void error (int __status, int __errnum, const char *__format, ...)
-     __attribute__ ((__format__ (__printf__, 3, 4)));
+     __attribute__ ((__format__ (__printf__, 3, 4))) __COLD;
 
 extern void error_at_line (int __status, int __errnum, const char *__fname,
 			   unsigned int __lineno, const char *__format, ...)
-     __attribute__ ((__format__ (__printf__, 5, 6)));
+     __attribute__ ((__format__ (__printf__, 5, 6))) __COLD;
 
 /* If NULL, error will flush stdout, then print on stderr the program
    name, a colon and a space.  Otherwise, error will call this