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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
104 lines
3.3 KiB
C
104 lines
3.3 KiB
C
/* Check if clone (CLONE_THREAD) does not call exit_group (BZ #21512)
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Copyright (C) 2017-2019 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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<https://www.gnu.org/licenses/>. */
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#include <string.h>
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#include <sched.h>
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#include <signal.h>
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#include <unistd.h>
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#include <sys/syscall.h>
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#include <sys/wait.h>
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#include <sys/types.h>
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#include <linux/futex.h>
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#include <stackinfo.h> /* For _STACK_GROWS_{UP,DOWN}. */
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#include <support/check.h>
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#include <stdatomic.h>
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/* Test if clone call with CLONE_THREAD does not call exit_group. The 'f'
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function returns '1', which will be used by clone thread to call the
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'exit' syscall directly. If _exit is used instead, exit_group will be
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used and thus the thread group will finish with return value of '1'
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(where '2' from main thread is expected. */
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static int
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f (void *a)
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{
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return 1;
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}
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/* Futex wait for TID argument, similar to pthread_join internal
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implementation. */
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#define wait_tid(ctid_ptr, ctid_val) \
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do { \
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__typeof (*(ctid_ptr)) __tid; \
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/* We need acquire MO here so that we synchronize with the \
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kernel's store to 0 when the clone terminates. */ \
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while ((__tid = atomic_load_explicit (ctid_ptr, \
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memory_order_acquire)) != 0) \
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futex_wait (ctid_ptr, ctid_val); \
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} while (0)
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static inline int
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futex_wait (int *futexp, int val)
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{
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return syscall (__NR_futex, futexp, FUTEX_WAIT, val);
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}
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static int
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do_test (void)
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{
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char st[1024] __attribute__ ((aligned));
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int clone_flags = CLONE_THREAD;
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/* Minimum required flags to used along with CLONE_THREAD. */
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clone_flags |= CLONE_VM | CLONE_SIGHAND;
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/* We will used ctid to call on futex to wait for thread exit. */
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clone_flags |= CLONE_CHILD_CLEARTID;
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/* Initialize with a known value. ctid is set to zero by the kernel after the
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cloned thread has exited. */
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#define CTID_INIT_VAL 1
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pid_t ctid = CTID_INIT_VAL;
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pid_t tid;
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#ifdef __ia64__
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extern int __clone2 (int (*__fn) (void *__arg), void *__child_stack_base,
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size_t __child_stack_size, int __flags,
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void *__arg, ...);
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tid = __clone2 (f, st, sizeof (st), clone_flags, NULL, /* ptid */ NULL,
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/* tls */ NULL, &ctid);
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#else
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#if _STACK_GROWS_DOWN
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tid = clone (f, st + sizeof (st), clone_flags, NULL, /* ptid */ NULL,
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/* tls */ NULL, &ctid);
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#elif _STACK_GROWS_UP
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tid = clone (f, st, clone_flags, NULL, /* ptid */ NULL, /* tls */ NULL,
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&ctid);
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#else
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#error "Define either _STACK_GROWS_DOWN or _STACK_GROWS_UP"
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#endif
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#endif
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if (tid == -1)
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FAIL_EXIT1 ("clone failed: %m");
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wait_tid (&ctid, CTID_INIT_VAL);
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return 2;
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}
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#define EXPECTED_STATUS 2
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#include <support/test-driver.c>
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