mirror of
https://sourceware.org/git/glibc.git
synced 2024-09-20 00:19:57 +00:00
5a82c74822
Also, change sources.redhat.com to sourceware.org.
This patch was automatically generated by running the following shell
script, which uses GNU sed, and which avoids modifying files imported
from upstream:
sed -ri '
s,(http|ftp)(://(.*\.)?(gnu|fsf|sourceware)\.org($|[^.]|\.[^a-z])),https\2,g
s,(http|ftp)(://(.*\.)?)sources\.redhat\.com($|[^.]|\.[^a-z]),https\2sourceware.org\4,g
' \
$(find $(git ls-files) -prune -type f \
! -name '*.po' \
! -name 'ChangeLog*' \
! -path COPYING ! -path COPYING.LIB \
! -path manual/fdl-1.3.texi ! -path manual/lgpl-2.1.texi \
! -path manual/texinfo.tex ! -path scripts/config.guess \
! -path scripts/config.sub ! -path scripts/install-sh \
! -path scripts/mkinstalldirs ! -path scripts/move-if-change \
! -path INSTALL ! -path locale/programs/charmap-kw.h \
! -path po/libc.pot ! -path sysdeps/gnu/errlist.c \
! '(' -name configure \
-execdir test -f configure.ac -o -f configure.in ';' ')' \
! '(' -name preconfigure \
-execdir test -f preconfigure.ac ';' ')' \
-print)
and then by running 'make dist-prepare' to regenerate files built
from the altered files, and then executing the following to cleanup:
chmod a+x sysdeps/unix/sysv/linux/riscv/configure
# Omit irrelevant whitespace and comment-only changes,
# perhaps from a slightly-different Autoconf version.
git checkout -f \
sysdeps/csky/configure \
sysdeps/hppa/configure \
sysdeps/riscv/configure \
sysdeps/unix/sysv/linux/csky/configure
# Omit changes that caused a pre-commit check to fail like this:
# remote: *** error: sysdeps/powerpc/powerpc64/ppc-mcount.S: trailing lines
git checkout -f \
sysdeps/powerpc/powerpc64/ppc-mcount.S \
sysdeps/unix/sysv/linux/s390/s390-64/syscall.S
# Omit change that caused a pre-commit check to fail like this:
# remote: *** error: sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S: last line does not end in newline
git checkout -f sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S
90 lines
2.7 KiB
C
90 lines
2.7 KiB
C
/* libio vtable validation.
|
|
Copyright (C) 2016-2019 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/>. */
|
|
|
|
#include <dlfcn.h>
|
|
#include <libioP.h>
|
|
#include <stdio.h>
|
|
#include <ldsodefs.h>
|
|
|
|
#ifdef SHARED
|
|
|
|
void (*IO_accept_foreign_vtables) (void) attribute_hidden;
|
|
|
|
/* Used to detected multiple libcs. */
|
|
extern struct dl_open_hook *_dl_open_hook;
|
|
libc_hidden_proto (_dl_open_hook);
|
|
|
|
#else /* !SHARED */
|
|
|
|
/* Used to check whether static dlopen support is needed. */
|
|
# pragma weak __dlopen
|
|
|
|
#endif
|
|
|
|
void attribute_hidden
|
|
_IO_vtable_check (void)
|
|
{
|
|
#ifdef SHARED
|
|
/* Honor the compatibility flag. */
|
|
void (*flag) (void) = atomic_load_relaxed (&IO_accept_foreign_vtables);
|
|
#ifdef PTR_DEMANGLE
|
|
PTR_DEMANGLE (flag);
|
|
#endif
|
|
if (flag == &_IO_vtable_check)
|
|
return;
|
|
|
|
/* In case this libc copy is in a non-default namespace, we always
|
|
need to accept foreign vtables because there is always a
|
|
possibility that FILE * objects are passed across the linking
|
|
boundary. */
|
|
{
|
|
Dl_info di;
|
|
struct link_map *l;
|
|
if (!rtld_active ()
|
|
|| (_dl_addr (_IO_vtable_check, &di, &l, NULL) != 0
|
|
&& l->l_ns != LM_ID_BASE))
|
|
return;
|
|
}
|
|
|
|
#else /* !SHARED */
|
|
/* We cannot perform vtable validation in the static dlopen case
|
|
because FILE * handles might be passed back and forth across the
|
|
boundary. Therefore, we disable checking in this case. */
|
|
if (__dlopen != NULL)
|
|
return;
|
|
#endif
|
|
|
|
__libc_fatal ("Fatal error: glibc detected an invalid stdio handle\n");
|
|
}
|
|
|
|
/* Some variants of libstdc++ interpose _IO_2_1_stdin_ etc. and
|
|
install their own vtables directly, without calling _IO_init or
|
|
other functions. Detect this by looking at the vtables values
|
|
during startup, and disable vtable validation in this case. */
|
|
#ifdef SHARED
|
|
__attribute__ ((constructor))
|
|
static void
|
|
check_stdfiles_vtables (void)
|
|
{
|
|
if (_IO_2_1_stdin_.vtable != &_IO_file_jumps
|
|
|| _IO_2_1_stdout_.vtable != &_IO_file_jumps
|
|
|| _IO_2_1_stderr_.vtable != &_IO_file_jumps)
|
|
IO_set_accept_foreign_vtables (&_IO_vtable_check);
|
|
}
|
|
#endif
|