Fix -Os gnu_dev_* linknamespace, localplt issues (bug 15105, bug 19463).
Building with -Os produces linknamespace and localplt failures for, among other functions, gnu_dev_major, gnu_dev_minor and gnu_dev_makedev. The issue is that those functions are not inlined when building with -Os. While one could force them to be inlined in that case, it seems more natural to fix this issue similarly to other namespace issues. Thus, this patch makes gnu_dev_* into weak aliases for hidden symbols __gnu_dev_*; __gnu_dev_* are then defined as inlines in the internal include/sys/sysmacros.h, and uses of gnu_dev_* (often via the macros major, minor and makedev) for which there are namespace issues are changed to use __gnu_dev_*; where there are no namespace issues, use of libc_hidden_proto serves to avoid unnecessary local PLT entry use. Tested for x86_64, (a) without -Os, to verify the testsuite continues to pass without problems and that the functions called under their new names continue to be inlined as expected in that case; (b) with -Os, to verify that the linknamespace and localplt failures in question go away (but because of other such failures present, neither of the relevant bugs can yet be closed). [BZ #15105] [BZ #19463] * include/sys/sysmacros.h [!_ISOMAC] (__SYSMACROS_NEED_IMPLEMENTATION): Define macro. [!_SYS_SYSMACROS_H_WRAPPER && !_ISOMAC] (_SYS_SYSMACROS_H_WRAPPER): Likewise. [!_SYS_SYSMACROS_H_WRAPPER && !_ISOMAC] (gnu_dev_major): Use libc_hidden_proto. [!_SYS_SYSMACROS_H_WRAPPER && !_ISOMAC] (gnu_dev_minor): Likewise. [!_SYS_SYSMACROS_H_WRAPPER && !_ISOMAC] (gnu_dev_makedev): Likewise. [!_SYS_SYSMACROS_H_WRAPPER && !_ISOMAC] (__SYSMACROS_DECL_TEMPL): Undefine and redefine to add use __gnu_dev_ prefix. [!_SYS_SYSMACROS_H_WRAPPER && !_ISOMAC] (__SYSMACROS_IMPL_TEMPL): Likewise. [!_SYS_SYSMACROS_H_WRAPPER && !_ISOMAC] (__gnu_dev_major): Declare and define as hidden inline function. [!_SYS_SYSMACROS_H_WRAPPER && !_ISOMAC] (__gnu_dev_minor): Likewise. [!_SYS_SYSMACROS_H_WRAPPER && !_ISOMAC] (__gnu_dev_makedev): Likewise. * misc/makedev.c (OUT_OF_LINE_IMPL_TEMPL): Use __gnu_dev_ prefix. (gnu_dev_major): Use weak_alias and libc_hidden_weak. (gnu_dev_minor): Likewise. (gnu_dev_makedev): Likewise. * csu/check_fds.c (check_one_fd): Use __gnu_dev_makedev instead of makedev. * posix/wordexp.c (exec_comm_child): Likewise. * sysdeps/mach/hurd/xmknodat.c (__xmknodat): Use __gnu_dev_minor instead of minor and __gnu_dev_major instead of major. * sysdeps/unix/sysv/linux/device-nrs.h (DEV_TTY_P): Use __gnu_dev_major instead of major. * sysdeps/unix/sysv/linux/pathconf.c (distinguish_extX): Use __gnu_dev_major instead of gnu_dev_major and __gnu_dev_minor instead of gnu_dev_minor. * sysdeps/unix/sysv/linux/ptsname.c (MASTER_P): Likewise. (SLAVE_P): Likewise. (__ptsname_internal): Use __gnu_dev_minor instead of minor. * sysdeps/unix/sysv/linux/ttyname.h (is_pty): Use __gnu_dev_major instead of major.
This commit is contained in:
Joseph Myers
parent
ce99922090
commit
8b4a118222
41
ChangeLog
41
ChangeLog
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@ -1,5 +1,46 @@
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2018-02-07 Joseph Myers <joseph@codesourcery.com>
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[BZ #15105]
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[BZ #19463]
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* include/sys/sysmacros.h [!_ISOMAC]
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(__SYSMACROS_NEED_IMPLEMENTATION): Define macro.
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[!_SYS_SYSMACROS_H_WRAPPER && !_ISOMAC]
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(_SYS_SYSMACROS_H_WRAPPER): Likewise.
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[!_SYS_SYSMACROS_H_WRAPPER && !_ISOMAC] (gnu_dev_major): Use
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libc_hidden_proto.
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[!_SYS_SYSMACROS_H_WRAPPER && !_ISOMAC] (gnu_dev_minor): Likewise.
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[!_SYS_SYSMACROS_H_WRAPPER && !_ISOMAC] (gnu_dev_makedev):
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Likewise.
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[!_SYS_SYSMACROS_H_WRAPPER && !_ISOMAC] (__SYSMACROS_DECL_TEMPL):
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Undefine and redefine to add use __gnu_dev_ prefix.
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[!_SYS_SYSMACROS_H_WRAPPER && !_ISOMAC] (__SYSMACROS_IMPL_TEMPL):
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Likewise.
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[!_SYS_SYSMACROS_H_WRAPPER && !_ISOMAC] (__gnu_dev_major): Declare
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and define as hidden inline function.
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[!_SYS_SYSMACROS_H_WRAPPER && !_ISOMAC] (__gnu_dev_minor):
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Likewise.
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[!_SYS_SYSMACROS_H_WRAPPER && !_ISOMAC] (__gnu_dev_makedev):
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Likewise.
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* misc/makedev.c (OUT_OF_LINE_IMPL_TEMPL): Use __gnu_dev_ prefix.
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(gnu_dev_major): Use weak_alias and libc_hidden_weak.
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(gnu_dev_minor): Likewise.
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(gnu_dev_makedev): Likewise.
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* csu/check_fds.c (check_one_fd): Use __gnu_dev_makedev instead of
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makedev.
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* posix/wordexp.c (exec_comm_child): Likewise.
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* sysdeps/mach/hurd/xmknodat.c (__xmknodat): Use __gnu_dev_minor
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instead of minor and __gnu_dev_major instead of major.
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* sysdeps/unix/sysv/linux/device-nrs.h (DEV_TTY_P): Use
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__gnu_dev_major instead of major.
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* sysdeps/unix/sysv/linux/pathconf.c (distinguish_extX): Use
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__gnu_dev_major instead of gnu_dev_major and __gnu_dev_minor
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instead of gnu_dev_minor.
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* sysdeps/unix/sysv/linux/ptsname.c (MASTER_P): Likewise.
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(SLAVE_P): Likewise.
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(__ptsname_internal): Use __gnu_dev_minor instead of minor.
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* sysdeps/unix/sysv/linux/ttyname.h (is_pty): Use __gnu_dev_major
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instead of major.
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[BZ #21313]
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* locale/weight.h (findidx): Disable -Wmaybe-uninitialized for -Os
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in another place.
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@ -50,12 +50,12 @@ check_one_fd (int fd, int mode)
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if ((mode & O_ACCMODE) == O_WRONLY)
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{
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name = _PATH_DEV "full";
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dev = makedev (DEV_FULL_MAJOR, DEV_FULL_MINOR);
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dev = __gnu_dev_makedev (DEV_FULL_MAJOR, DEV_FULL_MINOR);
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}
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else
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{
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name = _PATH_DEVNULL;
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dev = makedev (DEV_NULL_MAJOR, DEV_NULL_MINOR);
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dev = __gnu_dev_makedev (DEV_NULL_MAJOR, DEV_NULL_MINOR);
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}
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/* Something is wrong with this descriptor, it's probably not
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@ -1 +1,52 @@
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/* Definitions of macros to access 'dev_t' values. Internal header.
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Copyright (C) 2018 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#ifndef _ISOMAC
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# define __SYSMACROS_NEED_IMPLEMENTATION
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#endif
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#include <misc/sys/sysmacros.h>
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#if !defined _SYS_SYSMACROS_H_WRAPPER && !defined _ISOMAC
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# define _SYS_SYSMACROS_H_WRAPPER 1
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libc_hidden_proto (gnu_dev_major)
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libc_hidden_proto (gnu_dev_minor)
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libc_hidden_proto (gnu_dev_makedev)
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# undef __SYSMACROS_DECL_TEMPL
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# define __SYSMACROS_DECL_TEMPL(rtype, name, proto) \
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extern rtype __gnu_dev_##name proto \
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__THROW __attribute_const__ attribute_hidden;
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# undef __SYSMACROS_IMPL_TEMPL
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# define __SYSMACROS_IMPL_TEMPL(rtype, name, proto) \
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__extension__ __extern_inline __attribute_const__ rtype \
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__NTH (__gnu_dev_##name proto)
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__SYSMACROS_DECLARE_MAJOR (__SYSMACROS_DECL_TEMPL)
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__SYSMACROS_DECLARE_MINOR (__SYSMACROS_DECL_TEMPL)
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__SYSMACROS_DECLARE_MAKEDEV (__SYSMACROS_DECL_TEMPL)
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# ifdef __USE_EXTERN_INLINES
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__SYSMACROS_DEFINE_MAJOR (__SYSMACROS_IMPL_TEMPL)
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__SYSMACROS_DEFINE_MINOR (__SYSMACROS_IMPL_TEMPL)
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__SYSMACROS_DEFINE_MAKEDEV (__SYSMACROS_IMPL_TEMPL)
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# endif
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#endif
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@ -23,8 +23,14 @@
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#include <sys/sysmacros.h>
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#define OUT_OF_LINE_IMPL_TEMPL(rtype, name, proto) \
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rtype gnu_dev_##name proto
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rtype __gnu_dev_##name proto
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__SYSMACROS_DEFINE_MAJOR(OUT_OF_LINE_IMPL_TEMPL)
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weak_alias (__gnu_dev_major, gnu_dev_major)
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libc_hidden_weak (gnu_dev_major)
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__SYSMACROS_DEFINE_MINOR(OUT_OF_LINE_IMPL_TEMPL)
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weak_alias (__gnu_dev_minor, gnu_dev_minor)
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libc_hidden_weak (gnu_dev_minor)
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__SYSMACROS_DEFINE_MAKEDEV(OUT_OF_LINE_IMPL_TEMPL)
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weak_alias (__gnu_dev_makedev, gnu_dev_makedev)
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libc_hidden_weak (gnu_dev_makedev)
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@ -837,7 +837,7 @@ exec_comm_child (char *comm, int *fildes, int showerr, int noexec)
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if (__builtin_expect (__fxstat64 (_STAT_VER, STDERR_FILENO, &st), 0) != 0
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|| __builtin_expect (S_ISCHR (st.st_mode), 1) == 0
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#if defined DEV_NULL_MAJOR && defined DEV_NULL_MINOR
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|| st.st_rdev != makedev (DEV_NULL_MAJOR, DEV_NULL_MINOR)
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|| st.st_rdev != __gnu_dev_makedev (DEV_NULL_MAJOR, DEV_NULL_MINOR)
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#endif
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)
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/* It's not the /dev/null device. Stop right here. The
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@ -81,9 +81,9 @@ __xmknodat (int vers, int fd, const char *path, mode_t mode, dev_t *dev)
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bp = buf + sizeof (buf);
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*--bp = '\0';
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bp = _itoa (minor (*dev), bp, 10, 0);
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bp = _itoa (__gnu_dev_minor (*dev), bp, 10, 0);
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*--bp = '\0';
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bp = _itoa (major (*dev), bp, 10, 0);
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bp = _itoa (__gnu_dev_major (*dev), bp, 10, 0);
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memcpy (bp - len, translator, len);
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translator = bp - len;
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len = buf + sizeof (buf) - translator;
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@ -39,7 +39,7 @@
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/* Test whether given device is a tty. */
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#define DEV_TTY_P(statp) \
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({ int __dev_major = major ((statp)->st_rdev); \
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({ int __dev_major = __gnu_dev_major ((statp)->st_rdev); \
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__dev_major >= DEV_TTY_LOW_MAJOR && __dev_major <= DEV_TTY_HIGH_MAJOR; })
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#endif /* device-nrs.h */
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@ -73,7 +73,7 @@ distinguish_extX (const struct statfs *fsbuf, const char *file, int fd)
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return EXT2_LINK_MAX;
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__snprintf (buf, sizeof (buf), "/sys/dev/block/%u:%u",
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gnu_dev_major (st.st_dev), gnu_dev_minor (st.st_dev));
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__gnu_dev_major (st.st_dev), __gnu_dev_minor (st.st_dev));
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ssize_t n = __readlink (buf, path, sizeof (path));
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if (n != -1 && n < sizeof (path))
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@ -29,16 +29,18 @@
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#include <_itoa.h>
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/* Check if DEV corresponds to a master pseudo terminal device. */
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#define MASTER_P(Dev) \
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(major ((Dev)) == 2 \
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|| (major ((Dev)) == 4 && minor ((Dev)) >= 128 && minor ((Dev)) < 192) \
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|| (major ((Dev)) >= 128 && major ((Dev)) < 136))
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#define MASTER_P(Dev) \
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(__gnu_dev_major ((Dev)) == 2 \
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|| (__gnu_dev_major ((Dev)) == 4 \
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&& __gnu_dev_minor ((Dev)) >= 128 && __gnu_dev_minor ((Dev)) < 192) \
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|| (__gnu_dev_major ((Dev)) >= 128 && __gnu_dev_major ((Dev)) < 136))
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/* Check if DEV corresponds to a slave pseudo terminal device. */
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#define SLAVE_P(Dev) \
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(major ((Dev)) == 3 \
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|| (major ((Dev)) == 4 && minor ((Dev)) >= 192 && minor ((Dev)) < 256) \
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|| (major ((Dev)) >= 136 && major ((Dev)) < 144))
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#define SLAVE_P(Dev) \
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(__gnu_dev_major ((Dev)) == 3 \
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|| (__gnu_dev_major ((Dev)) == 4 \
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&& __gnu_dev_minor ((Dev)) >= 192 && __gnu_dev_minor ((Dev)) < 256) \
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|| (__gnu_dev_major ((Dev)) >= 136 && __gnu_dev_major ((Dev)) < 144))
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/* Note that major number 4 corresponds to the old BSD style pseudo
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terminal devices. As of Linux 2.1.115 these are no longer
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@ -122,7 +124,7 @@ __ptsname_internal (int fd, char *buf, size_t buflen, struct stat64 *stp)
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return ENOTTY;
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}
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ptyno = minor (stp->st_rdev);
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ptyno = __gnu_dev_minor (stp->st_rdev);
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if (ptyno / 16 >= strlen (__libc_ptyname1))
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{
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@ -28,7 +28,7 @@ static inline bool
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is_pty (struct stat64 *sb)
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{
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#ifdef _STATBUF_ST_RDEV
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int m = major (sb->st_rdev);
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int m = __gnu_dev_major (sb->st_rdev);
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return (136 <= m && m <= 143);
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#else
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return false;
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