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27d83441a2
The behavior of the signal mask on threads created by timer_create for SIGEV_THREAD timers are implementation-defined and glibc explicit unblocks all signals before calling the user-defined function. This behavior, although not incorrect standard-wise, opens a race if a program using a blocked rt-signal plus sigwaitinfo (and without an installed signal handler for the rt-signal) receives a signal while executing the used-defined function for SIGEV_THREAD. A better alternative discussed in bug report is to rather block all signals (besides the internal ones not available to application usage). This patch fixes this issue by only unblocking SIGSETXID (used on set*uid function) and SIGCANCEL (used for thread cancellation). Checked on x86_64-linux-gnu and i686-linux-gnu.
75 lines
2.5 KiB
Makefile
75 lines
2.5 KiB
Makefile
# Copyright (C) 1997-2020 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 real-time portion of the library.
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#
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subdir := rt
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include ../Makeconfig
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headers := aio.h mqueue.h bits/mqueue.h bits/mqueue2.h
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aio-routines := aio_cancel aio_error aio_fsync aio_misc aio_read \
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aio_read64 aio_return aio_suspend aio_write \
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aio_write64 lio_listio lio_listio64 aio_sigqueue \
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aio_notify
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timer-routines := timer_create timer_delete timer_getoverr \
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timer_gettime timer_settime
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shm-routines := shm_open shm_unlink
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mq-routines := mq_open mq_close mq_unlink mq_getattr mq_setattr \
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mq_notify mq_send mq_receive mq_timedsend \
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mq_timedreceive
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librt-routines = $(aio-routines) \
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$(timer-routines) \
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$(shm-routines) $(mq-routines)
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tests := tst-shm tst-timer tst-timer2 \
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tst-aio tst-aio64 tst-aio2 tst-aio3 tst-aio4 tst-aio5 tst-aio6 \
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tst-aio7 tst-aio8 tst-aio9 tst-aio10 \
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tst-mqueue1 tst-mqueue2 tst-mqueue3 tst-mqueue4 \
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tst-mqueue5 tst-mqueue6 tst-mqueue7 tst-mqueue8 tst-mqueue9 \
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tst-timer3 tst-timer4 tst-timer5 \
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tst-cpuclock2 tst-cputimer1 tst-cputimer2 tst-cputimer3 \
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tst-shm-cancel
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tests-internal := tst-timer-sigmask
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extra-libs := librt
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extra-libs-others := $(extra-libs)
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include ../Rules
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CFLAGS-aio_suspend.c += -fexceptions
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CFLAGS-mq_timedreceive.c += -fexceptions -fasynchronous-unwind-tables
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CFLAGS-mq_timedsend.c += -fexceptions -fasynchronous-unwind-tables
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CFLAGS-librt-cancellation.c += -fasynchronous-unwind-tables
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LDFLAGS-rt.so = -Wl,--enable-new-dtags,-z,nodelete
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$(objpfx)librt.so: $(shared-thread-library)
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ifeq (yes,$(build-shared))
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$(addprefix $(objpfx),$(tests) $(tests-internal)): \
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$(objpfx)librt.so $(shared-thread-library)
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else
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$(addprefix $(objpfx),$(tests)) $(tests-internal): \
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$(objpfx)librt.a $(static-thread-library)
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endif
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tst-mqueue7-ARGS = -- $(host-test-program-cmd)
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