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706ad1e7af
The variable is placed in libc.so, and it can be true only in an outer libc, not libcs loaded via dlmopen or static dlopen. Since thread creation from inner namespaces does not work, pthread_create can update __libc_single_threaded directly. Using __libc_early_init and its initial flag, implementation of this variable is very straightforward. A future version may reset the flag during fork (but not in an inner namespace), or after joining all threads except one. Reviewed-by: DJ Delorie <dj@redhat.com>
163 lines
6.0 KiB
Makefile
163 lines
6.0 KiB
Makefile
# Copyright (C) 1991-2020 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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#
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# Sub-makefile for misc portion of the library.
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#
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subdir := misc
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include ../Makeconfig
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headers := sys/uio.h bits/uio-ext.h bits/uio_lim.h \
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sys/ioctl.h bits/ioctls.h bits/ioctl-types.h \
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sys/ptrace.h sys/file.h sys/dir.h sys/cdefs.h \
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ar.h a.out.h libgen.h stab.h bits/stab.def sgtty.h \
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ttyent.h paths.h sys/reboot.h \
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sys/mman.h sys/param.h bits/param.h \
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fstab.h mntent.h search.h err.h error.h \
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sys/queue.h sysexits.h syscall.h sys/syscall.h sys/swap.h \
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sys/select.h sys/sysinfo.h \
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regexp.h bits/select.h bits/mman.h sys/xattr.h \
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syslog.h sys/syslog.h \
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bits/syslog.h bits/syslog-ldbl.h bits/syslog-path.h bits/error.h \
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bits/select2.h bits/hwcap.h sys/auxv.h \
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sys/sysmacros.h bits/sysmacros.h bits/types/struct_iovec.h \
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bits/err-ldbl.h bits/error-ldbl.h \
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sys/single_threaded.h
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routines := brk sbrk sstk ioctl \
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readv writev preadv preadv64 pwritev pwritev64 \
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preadv2 preadv64v2 pwritev2 pwritev64v2 \
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setreuid setregid \
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seteuid setegid \
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getpagesize \
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getdtsz \
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gethostname sethostname getdomain setdomain \
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select pselect \
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acct chroot fsync sync fdatasync syncfs reboot \
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gethostid sethostid \
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revoke vhangup \
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swapon swapoff mktemp mkstemp mkstemp64 mkdtemp \
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mkostemp mkostemp64 mkstemps mkstemps64 mkostemps mkostemps64 \
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ualarm usleep \
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gtty stty \
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ptrace \
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fstab mntent mntent_r \
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utimes lutimes futimes futimesat \
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truncate ftruncate truncate64 ftruncate64 \
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chflags fchflags \
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insremque getttyent getusershell getpass ttyslot \
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syslog syscall daemon \
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mmap mmap64 munmap mprotect msync madvise mincore remap_file_pages\
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mlock munlock mlockall munlockall \
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efgcvt efgcvt_r qefgcvt qefgcvt_r \
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hsearch hsearch_r tsearch lsearch \
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err error ustat \
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getsysstats dirname regexp \
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getloadavg getclktck \
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fgetxattr flistxattr fremovexattr fsetxattr getxattr \
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listxattr lgetxattr llistxattr lremovexattr lsetxattr \
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removexattr setxattr getauxval ifunc-impl-list makedev \
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allocate_once fd_to_filename single_threaded
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generated += tst-error1.mtrace tst-error1-mem.out \
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tst-allocate_once.mtrace tst-allocate_once-mem.out
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aux := init-misc
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install-lib := libg.a
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gpl2lgpl := error.c error.h
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tests := tst-dirname tst-tsearch tst-fdset tst-mntent tst-hsearch \
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tst-error1 tst-pselect tst-insremque tst-mntent2 bug-hsearch1 \
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tst-mntent-blank-corrupt tst-mntent-blank-passno bug18240 \
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tst-preadvwritev tst-preadvwritev64 tst-makedev tst-empty \
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tst-preadvwritev2 tst-preadvwritev64v2 tst-warn-wide \
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tst-ldbl-warn tst-ldbl-error tst-dbl-efgcvt tst-ldbl-efgcvt \
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tst-mntent-autofs tst-syscalls
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# Tests which need libdl.
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ifeq (yes,$(build-shared))
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tests += tst-gethostid
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endif
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tests-internal := tst-atomic tst-atomic-long tst-allocate_once
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tests-static := tst-empty
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# Test for the internal, non-exported __fd_to_filename function.
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tests-internal += tst-fd_to_filename
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tests-static += tst-fd_to_filename
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ifeq ($(run-built-tests),yes)
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tests-special += $(objpfx)tst-error1-mem.out \
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$(objpfx)tst-allocate_once-mem.out
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endif
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CFLAGS-select.c += -fexceptions -fasynchronous-unwind-tables
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CFLAGS-tsearch.c += $(uses-callbacks)
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CFLAGS-lsearch.c += $(uses-callbacks)
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CFLAGS-pselect.c += -fexceptions
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CFLAGS-readv.c += -fexceptions -fasynchronous-unwind-tables
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CFLAGS-writev.c += -fexceptions -fasynchronous-unwind-tables
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CFLAGS-preadv.c += -fexceptions -fasynchronous-unwind-tables
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CFLAGS-preadv64.c += -fexceptions -fasynchronous-unwind-tables
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CFLAGS-pwritev.c += -fexceptions -fasynchronous-unwind-tables
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CFLAGS-pwritev64.c += -fexceptions -fasynchronous-unwind-tables
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CFLAGS-preadv2.c += -fexceptions -fasynchronous-unwind-tables
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CFLAGS-preadv64v2.c += -fexceptions -fasynchronous-unwind-tables
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CFLAGS-pwritev2.c += -fexceptions -fasynchronous-unwind-tables
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CFLAGS-pwritev64v2.c += -fexceptions -fasynchronous-unwind-tables
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CFLAGS-usleep.c += -fexceptions
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CFLAGS-syslog.c += -fexceptions
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CFLAGS-error.c += -fexceptions
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CFLAGS-getpass.c += -fexceptions
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CFLAGS-mkstemp.c += -fexceptions
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CFLAGS-mkstemp64.c += -fexceptions
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CFLAGS-getsysstats.c += -fexceptions
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CFLAGS-getusershell.c += -fexceptions
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CFLAGS-err.c += -fexceptions
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CFLAGS-tst-tsearch.c += $(stack-align-test-flags)
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CFLAGS-msync.c += -fexceptions -fasynchronous-unwind-tables
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CFLAGS-fdatasync.c += -fexceptions -fasynchronous-unwind-tables
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CFLAGS-fsync.c += -fexceptions -fasynchronous-unwind-tables
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# Called during static library initialization, so turn stack-protection
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# off for non-shared builds.
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CFLAGS-sbrk.o = $(no-stack-protector)
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CFLAGS-sbrk.op = $(no-stack-protector)
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CFLAGS-brk.o = $(no-stack-protector)
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CFLAGS-brk.op = $(no-stack-protector)
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include ../Rules
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$(objpfx)libg.a: $(dep-dummy-lib); $(make-dummy-lib)
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$(objpfx)tst-tsearch: $(libm)
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tst-error1-ENV = MALLOC_TRACE=$(objpfx)tst-error1.mtrace
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tst-error1-ARGS = $(objpfx)tst-error1.out
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$(objpfx)tst-error1-mem.out: $(objpfx)tst-error1.out
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$(common-objpfx)malloc/mtrace $(objpfx)tst-error1.mtrace > $@; \
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$(evaluate-test)
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tst-allocate_once-ENV = MALLOC_TRACE=$(objpfx)tst-allocate_once.mtrace
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$(objpfx)tst-allocate_once-mem.out: $(objpfx)tst-allocate_once.out
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$(common-objpfx)malloc/mtrace $(objpfx)tst-allocate_once.mtrace > $@; \
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$(evaluate-test)
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$(objpfx)tst-gethostid: $(libdl)
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