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glibc/glibc-upstream-2.34-310.patch
Arjun Shankar 955387a035 Sync with upstream branch release/2.34/master 
Upstream commit: e3976287b22422787f3cc6fc9adda58304b55bd9

- Handle non-hostname CNAME aliases during name resolution (#2129005)
- nscd: Drop local address tuple variable [BZ #29607]
- x86-64: Require BMI1/BMI2 for AVX2 strrchr and wcsrchr implementations
- x86-64: Require BMI2 and LZCNT for AVX2 memrchr implementation
- x86-64: Require BMI2 for AVX2 (raw|w)memchr implementations
- x86-64: Require BMI2 for AVX2 wcs(n)cmp implementations
- x86-64: Require BMI2 for AVX2 strncmp implementation
- x86-64: Require BMI2 for AVX2 strcmp implementation
- x86-64: Require BMI2 for AVX2 str(n)casecmp implementations
- x86: include BMI1 and BMI2 in x86-64-v3 level
- nptl: Add backoff mechanism to spinlock loop
- sysdeps: Add 'get_fast_jitter' interace in fast-jitter.h
- nptl: Effectively skip CAS in spinlock loop
- Move assignment out of the CAS condition
- Add LLL_MUTEX_READ_LOCK [BZ #28537]
- Avoid extra load with CAS in __pthread_mutex_clocklock_common [BZ #28537]
- Avoid extra load with CAS in __pthread_mutex_lock_full [BZ #28537]
- resolv: Fix building tst-resolv-invalid-cname for earlier C standards
- nss_dns: Rewrite _nss_dns_gethostbyname4_r using current interfaces
- resolv: Add new tst-resolv-invalid-cname
- nss_dns: In gaih_getanswer_slice, skip strange aliases (bug 12154)
  (#2129005)
- nss_dns: Rewrite getanswer_r to match getanswer_ptr (bug 12154, bug 29305)
- nss_dns: Remove remnants of IPv6 address mapping
- nss_dns: Rewrite _nss_dns_gethostbyaddr2_r and getanswer_ptr
- nss_dns: Split getanswer_ptr from getanswer_r
- resolv: Add DNS packet parsing helpers geared towards wire format
- resolv: Add internal __ns_name_length_uncompressed function
- resolv: Add the __ns_samebinaryname function
- resolv: Add internal __res_binary_hnok function
- resolv: Add tst-resolv-aliases
- resolv: Add tst-resolv-byaddr for testing reverse lookup
- gconv: Use 64-bit interfaces in gconv_parseconfdir (bug 29583)
- elf: Fix hwcaps string size overestimation
- nscd: Fix netlink cache invalidation if epoll is used [BZ #29415]
- Apply asm redirections in wchar.h before first use
- Apply asm redirections in stdio.h before first use [BZ #27087]
- elf: Call __libc_early_init for reused namespaces (bug 29528)

Reviewed-by: Florian Weimer <fweimer@redhat.com>
2022-10-13 14:20:17 +02:00

335 lines
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commit 2a44960cbc78713c6a2721683a4319d50e71a01f
Author: Tulio Magno Quites Machado Filho <tuliom@linux.ibm.com>
Date: Thu Jul 7 18:12:58 2022 -0300
Apply asm redirections in stdio.h before first use [BZ #27087]
Compilers may not be able to apply asm redirections to functions after
these functions are used for the first time, e.g. clang 13.
Fix [BZ #27087] by applying all long double-related asm redirections
before using functions in bits/stdio.h.
However, as these asm redirections depend on the declarations provided
by libio/bits/stdio2.h, this header was split in 2:
- libio/bits/stdio2-decl.h contains all function declarations;
- libio/bits/stdio2.h remains with the remaining contents, including
redirections.
This also adds the access attribute to __vsnprintf_chk that was missing.
Tested with build-many-glibcs.py.
Reviewed-by: Paul E. Murphy <murphyp@linux.ibm.com>
(cherry picked from commit d0fa09a7701956036ff36f8ca188e9fff81553d8)
diff --git a/include/bits/stdio2-decl.h b/include/bits/stdio2-decl.h
new file mode 100644
index 0000000000000000..bbb052f192218219
--- /dev/null
+++ b/include/bits/stdio2-decl.h
@@ -0,0 +1 @@
+#include <libio/bits/stdio2-decl.h>
diff --git a/libio/Makefile b/libio/Makefile
index 5336b7d59584927f..981c876940f67fbf 100644
--- a/libio/Makefile
+++ b/libio/Makefile
@@ -23,7 +23,7 @@ subdir := libio
include ../Makeconfig
headers := stdio.h \
- bits/stdio.h bits/stdio2.h bits/stdio-ldbl.h \
+ bits/stdio.h bits/stdio2.h bits/stdio2-decl.h bits/stdio-ldbl.h \
bits/types/FILE.h bits/types/__FILE.h bits/types/struct_FILE.h \
bits/types/__fpos_t.h bits/types/__fpos64_t.h \
bits/types/cookie_io_functions_t.h
diff --git a/libio/bits/stdio2-decl.h b/libio/bits/stdio2-decl.h
new file mode 100644
index 0000000000000000..e398f7182b98e4d7
--- /dev/null
+++ b/libio/bits/stdio2-decl.h
@@ -0,0 +1,111 @@
+/* Checking macros for stdio functions. Declarations only.
+ Copyright (C) 2004-2022 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
+
+#ifndef _BITS_STDIO2_DEC_H
+#define _BITS_STDIO2_DEC_H 1
+
+#ifndef _STDIO_H
+# error "Never include <bits/stdio2-decl.h> directly; use <stdio.h> instead."
+#endif
+
+extern int __sprintf_chk (char *__restrict __s, int __flag, size_t __slen,
+ const char *__restrict __format, ...) __THROW
+ __attr_access ((__write_only__, 1, 3));
+extern int __vsprintf_chk (char *__restrict __s, int __flag, size_t __slen,
+ const char *__restrict __format,
+ __gnuc_va_list __ap) __THROW
+ __attr_access ((__write_only__, 1, 3));
+
+#if defined __USE_ISOC99 || defined __USE_UNIX98
+
+extern int __snprintf_chk (char *__restrict __s, size_t __n, int __flag,
+ size_t __slen, const char *__restrict __format,
+ ...) __THROW
+ __attr_access ((__write_only__, 1, 2));
+extern int __vsnprintf_chk (char *__restrict __s, size_t __n, int __flag,
+ size_t __slen, const char *__restrict __format,
+ __gnuc_va_list __ap) __THROW
+ __attr_access ((__write_only__, 1, 2));
+
+#endif
+
+#if __USE_FORTIFY_LEVEL > 1
+
+extern int __fprintf_chk (FILE *__restrict __stream, int __flag,
+ const char *__restrict __format, ...);
+extern int __printf_chk (int __flag, const char *__restrict __format, ...);
+extern int __vfprintf_chk (FILE *__restrict __stream, int __flag,
+ const char *__restrict __format, __gnuc_va_list __ap);
+extern int __vprintf_chk (int __flag, const char *__restrict __format,
+ __gnuc_va_list __ap);
+
+# ifdef __USE_XOPEN2K8
+extern int __dprintf_chk (int __fd, int __flag, const char *__restrict __fmt,
+ ...) __attribute__ ((__format__ (__printf__, 3, 4)));
+extern int __vdprintf_chk (int __fd, int __flag,
+ const char *__restrict __fmt, __gnuc_va_list __arg)
+ __attribute__ ((__format__ (__printf__, 3, 0)));
+# endif
+
+# ifdef __USE_GNU
+
+extern int __asprintf_chk (char **__restrict __ptr, int __flag,
+ const char *__restrict __fmt, ...)
+ __THROW __attribute__ ((__format__ (__printf__, 3, 4))) __wur;
+extern int __vasprintf_chk (char **__restrict __ptr, int __flag,
+ const char *__restrict __fmt, __gnuc_va_list __arg)
+ __THROW __attribute__ ((__format__ (__printf__, 3, 0))) __wur;
+extern int __obstack_printf_chk (struct obstack *__restrict __obstack,
+ int __flag, const char *__restrict __format,
+ ...)
+ __THROW __attribute__ ((__format__ (__printf__, 3, 4)));
+extern int __obstack_vprintf_chk (struct obstack *__restrict __obstack,
+ int __flag,
+ const char *__restrict __format,
+ __gnuc_va_list __args)
+ __THROW __attribute__ ((__format__ (__printf__, 3, 0)));
+
+# endif
+#endif
+
+#if __GLIBC_USE (DEPRECATED_GETS)
+extern char *__gets_chk (char *__str, size_t) __wur;
+#endif
+
+extern char *__fgets_chk (char *__restrict __s, size_t __size, int __n,
+ FILE *__restrict __stream)
+ __wur __attr_access ((__write_only__, 1, 3));
+
+extern size_t __fread_chk (void *__restrict __ptr, size_t __ptrlen,
+ size_t __size, size_t __n,
+ FILE *__restrict __stream) __wur;
+
+#ifdef __USE_GNU
+extern char *__fgets_unlocked_chk (char *__restrict __s, size_t __size,
+ int __n, FILE *__restrict __stream)
+ __wur __attr_access ((__write_only__, 1, 3));
+#endif
+
+#ifdef __USE_MISC
+# undef fread_unlocked
+extern size_t __fread_unlocked_chk (void *__restrict __ptr, size_t __ptrlen,
+ size_t __size, size_t __n,
+ FILE *__restrict __stream) __wur;
+#endif
+
+#endif /* bits/stdio2-decl.h. */
diff --git a/libio/bits/stdio2.h b/libio/bits/stdio2.h
index 40ff16b01b4f4876..4570f86a4496c1ee 100644
--- a/libio/bits/stdio2.h
+++ b/libio/bits/stdio2.h
@@ -23,14 +23,6 @@
# error "Never include <bits/stdio2.h> directly; use <stdio.h> instead."
#endif
-extern int __sprintf_chk (char *__restrict __s, int __flag, size_t __slen,
- const char *__restrict __format, ...) __THROW
- __attr_access ((__write_only__, 1, 3));
-extern int __vsprintf_chk (char *__restrict __s, int __flag, size_t __slen,
- const char *__restrict __format,
- __gnuc_va_list __ap) __THROW
- __attr_access ((__write_only__, 1, 3));
-
#ifdef __va_arg_pack
__fortify_function int
__NTH (sprintf (char *__restrict __s, const char *__restrict __fmt, ...))
@@ -54,15 +46,6 @@ __NTH (vsprintf (char *__restrict __s, const char *__restrict __fmt,
}
#if defined __USE_ISOC99 || defined __USE_UNIX98
-
-extern int __snprintf_chk (char *__restrict __s, size_t __n, int __flag,
- size_t __slen, const char *__restrict __format,
- ...) __THROW
- __attr_access ((__write_only__, 1, 2));
-extern int __vsnprintf_chk (char *__restrict __s, size_t __n, int __flag,
- size_t __slen, const char *__restrict __format,
- __gnuc_va_list __ap) __THROW;
-
# ifdef __va_arg_pack
__fortify_function int
__NTH (snprintf (char *__restrict __s, size_t __n,
@@ -89,15 +72,6 @@ __NTH (vsnprintf (char *__restrict __s, size_t __n,
#endif
#if __USE_FORTIFY_LEVEL > 1
-
-extern int __fprintf_chk (FILE *__restrict __stream, int __flag,
- const char *__restrict __format, ...);
-extern int __printf_chk (int __flag, const char *__restrict __format, ...);
-extern int __vfprintf_chk (FILE *__restrict __stream, int __flag,
- const char *__restrict __format, __gnuc_va_list __ap);
-extern int __vprintf_chk (int __flag, const char *__restrict __format,
- __gnuc_va_list __ap);
-
# ifdef __va_arg_pack
__fortify_function int
fprintf (FILE *__restrict __stream, const char *__restrict __fmt, ...)
@@ -136,12 +110,6 @@ vfprintf (FILE *__restrict __stream,
}
# ifdef __USE_XOPEN2K8
-extern int __dprintf_chk (int __fd, int __flag, const char *__restrict __fmt,
- ...) __attribute__ ((__format__ (__printf__, 3, 4)));
-extern int __vdprintf_chk (int __fd, int __flag,
- const char *__restrict __fmt, __gnuc_va_list __arg)
- __attribute__ ((__format__ (__printf__, 3, 0)));
-
# ifdef __va_arg_pack
__fortify_function int
dprintf (int __fd, const char *__restrict __fmt, ...)
@@ -162,23 +130,6 @@ vdprintf (int __fd, const char *__restrict __fmt, __gnuc_va_list __ap)
# endif
# ifdef __USE_GNU
-
-extern int __asprintf_chk (char **__restrict __ptr, int __flag,
- const char *__restrict __fmt, ...)
- __THROW __attribute__ ((__format__ (__printf__, 3, 4))) __wur;
-extern int __vasprintf_chk (char **__restrict __ptr, int __flag,
- const char *__restrict __fmt, __gnuc_va_list __arg)
- __THROW __attribute__ ((__format__ (__printf__, 3, 0))) __wur;
-extern int __obstack_printf_chk (struct obstack *__restrict __obstack,
- int __flag, const char *__restrict __format,
- ...)
- __THROW __attribute__ ((__format__ (__printf__, 3, 4)));
-extern int __obstack_vprintf_chk (struct obstack *__restrict __obstack,
- int __flag,
- const char *__restrict __format,
- __gnuc_va_list __args)
- __THROW __attribute__ ((__format__ (__printf__, 3, 0)));
-
# ifdef __va_arg_pack
__fortify_function int
__NTH (asprintf (char **__restrict __ptr, const char *__restrict __fmt, ...))
@@ -231,7 +182,6 @@ __NTH (obstack_vprintf (struct obstack *__restrict __obstack,
#endif
#if __GLIBC_USE (DEPRECATED_GETS)
-extern char *__gets_chk (char *__str, size_t) __wur;
extern char *__REDIRECT (__gets_warn, (char *__str), gets)
__wur __warnattr ("please use fgets or getline instead, gets can't "
"specify buffer size");
@@ -245,9 +195,6 @@ gets (char *__str)
}
#endif
-extern char *__fgets_chk (char *__restrict __s, size_t __size, int __n,
- FILE *__restrict __stream)
- __wur __attr_access ((__write_only__, 1, 3));
extern char *__REDIRECT (__fgets_alias,
(char *__restrict __s, int __n,
FILE *__restrict __stream), fgets)
@@ -269,9 +216,6 @@ fgets (char *__restrict __s, int __n, FILE *__restrict __stream)
return __fgets_chk (__s, sz, __n, __stream);
}
-extern size_t __fread_chk (void *__restrict __ptr, size_t __ptrlen,
- size_t __size, size_t __n,
- FILE *__restrict __stream) __wur;
extern size_t __REDIRECT (__fread_alias,
(void *__restrict __ptr, size_t __size,
size_t __n, FILE *__restrict __stream),
@@ -297,9 +241,6 @@ fread (void *__restrict __ptr, size_t __size, size_t __n,
}
#ifdef __USE_GNU
-extern char *__fgets_unlocked_chk (char *__restrict __s, size_t __size,
- int __n, FILE *__restrict __stream)
- __wur __attr_access ((__write_only__, 1, 3));
extern char *__REDIRECT (__fgets_unlocked_alias,
(char *__restrict __s, int __n,
FILE *__restrict __stream), fgets_unlocked)
@@ -324,9 +265,6 @@ fgets_unlocked (char *__restrict __s, int __n, FILE *__restrict __stream)
#ifdef __USE_MISC
# undef fread_unlocked
-extern size_t __fread_unlocked_chk (void *__restrict __ptr, size_t __ptrlen,
- size_t __size, size_t __n,
- FILE *__restrict __stream) __wur;
extern size_t __REDIRECT (__fread_unlocked_alias,
(void *__restrict __ptr, size_t __size,
size_t __n, FILE *__restrict __stream),
diff --git a/libio/stdio.h b/libio/stdio.h
index abefe640e52d18d5..d36e61c56bbb3117 100644
--- a/libio/stdio.h
+++ b/libio/stdio.h
@@ -879,20 +879,27 @@ extern void funlockfile (FILE *__stream) __THROW;
extern int __uflow (FILE *);
extern int __overflow (FILE *, int);
+#if __USE_FORTIFY_LEVEL > 0 && defined __fortify_function
+/* Declare all functions from bits/stdio2-decl.h first. */
+# include <bits/stdio2-decl.h>
+#endif
+
+/* The following headers provide asm redirections. These redirections must
+ appear before the first usage of these functions, e.g. in bits/stdio.h. */
+#if defined __LDBL_COMPAT || __LDOUBLE_REDIRECTS_TO_FLOAT128_ABI == 1
+# include <bits/stdio-ldbl.h>
+#endif
+
/* If we are compiling with optimizing read this file. It contains
several optimizing inline functions and macros. */
#ifdef __USE_EXTERN_INLINES
# include <bits/stdio.h>
#endif
#if __USE_FORTIFY_LEVEL > 0 && defined __fortify_function
+/* Now include the function definitions and redirects too. */
# include <bits/stdio2.h>
#endif
-#include <bits/floatn.h>
-#if defined __LDBL_COMPAT || __LDOUBLE_REDIRECTS_TO_FLOAT128_ABI == 1
-# include <bits/stdio-ldbl.h>
-#endif
-
__END_DECLS
#endif /* <stdio.h> included. */
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