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#!/bin/gawk
#
# Copyright (c) 2014-2015 Dmitry V. Levin <ldv@altlinux.org>
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# 3. The name of the author may not be used to endorse or promote products
# derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Rewrite signal mask decoding without sigset_t
The sigset_t provided by libc is not quite convenient.
In glibc, sigset_t is an array with space for 1024 bits, which is much
more than required: all architectures supported by Linux have only 64
signals except MIPS, which has 128.
In bionic libc, LP32 sigset_t is only 4 bytes long, which is less than
necessary.
With this change, signal mask is decoded without use of intermediate
sigset_t structure, which saves us some cpu cycles in case of glibc with
its inflated sigset_t, and enables build with libcs where sigset_t is
broken.
Old implementation used to check each signal number in the given signal
mask twice using sigismember().
New implementation is based on popcount and next_set_bit() so it's
noticeably faster.
* configure.ac: Check for __builtin_popcount.
* signal.c: Ensure that NSIG >= 32.
(sprintsigmask, sprintsigmask_long, printsigmask): Remove.
(popcount32, sprintsigmask_n): New functions.
(tprintsigmask_addr, sprintsigmask_val, tprintsigmask_val): New macros.
(print_sigset_addr_len, sys_sigsetmask, sys_sigreturn, sys_siggetmask,
sys_sigsuspend, sys_sigprocmask, decode_new_sigaction): Update to use
new signal mask decoding interface.
* tests/sigaction.c (main): Add a test with almost filled signal mask.
* tests/sigaction.awk: Update.
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BEGIN {
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n1 [ 1 ] = "SIG_IGN, \\[HUP INT\\], SA_RESTORER\\|SA_RESTART, 0x[0-9a-f]+"
n2 [ 1 ] = "SIG_IGN, \\[HUP INT\\], SA_RESTART"
Rewrite signal mask decoding without sigset_t
The sigset_t provided by libc is not quite convenient.
In glibc, sigset_t is an array with space for 1024 bits, which is much
more than required: all architectures supported by Linux have only 64
signals except MIPS, which has 128.
In bionic libc, LP32 sigset_t is only 4 bytes long, which is less than
necessary.
With this change, signal mask is decoded without use of intermediate
sigset_t structure, which saves us some cpu cycles in case of glibc with
its inflated sigset_t, and enables build with libcs where sigset_t is
broken.
Old implementation used to check each signal number in the given signal
mask twice using sigismember().
New implementation is based on popcount and next_set_bit() so it's
noticeably faster.
* configure.ac: Check for __builtin_popcount.
* signal.c: Ensure that NSIG >= 32.
(sprintsigmask, sprintsigmask_long, printsigmask): Remove.
(popcount32, sprintsigmask_n): New functions.
(tprintsigmask_addr, sprintsigmask_val, tprintsigmask_val): New macros.
(print_sigset_addr_len, sys_sigsetmask, sys_sigreturn, sys_siggetmask,
sys_sigsuspend, sys_sigprocmask, decode_new_sigaction): Update to use
new signal mask decoding interface.
* tests/sigaction.c (main): Add a test with almost filled signal mask.
* tests/sigaction.awk: Update.
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n1 [ 2 ] = "0x[0-9a-f]+, \\[QUIT TERM\\], SA_RESTORER\\|SA_SIGINFO, 0x[0-9a-f]+"
n2 [ 2 ] = "0x[0-9a-f]+, \\[QUIT TERM\\], SA_SIGINFO"
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n1 [ 3 ] = "SIG_DFL, \\[\\], SA_RESTORER, 0x[0-9a-f]+"
n2 [ 3 ] = "SIG_DFL, \\[\\], 0"
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n1 [ 4 ] = "SIG_DFL, ~\\[HUP( ((RT|SIGRT)[^] ]+|[3-9][0-9]|1[0-9][0-9]))*\\], SA_RESTORER, 0x[0-9a-f]+"
n2 [ 4 ] = "SIG_DFL, ~\\[HUP( ((RT|SIGRT)[^] ]+|[3-9][0-9]|1[0-9][0-9]))*\\], 0"
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o1 [ 1 ] = o2 [ 1 ] = "SIG_DFL, \\[\\], 0"
Rewrite signal mask decoding without sigset_t
The sigset_t provided by libc is not quite convenient.
In glibc, sigset_t is an array with space for 1024 bits, which is much
more than required: all architectures supported by Linux have only 64
signals except MIPS, which has 128.
In bionic libc, LP32 sigset_t is only 4 bytes long, which is less than
necessary.
With this change, signal mask is decoded without use of intermediate
sigset_t structure, which saves us some cpu cycles in case of glibc with
its inflated sigset_t, and enables build with libcs where sigset_t is
broken.
Old implementation used to check each signal number in the given signal
mask twice using sigismember().
New implementation is based on popcount and next_set_bit() so it's
noticeably faster.
* configure.ac: Check for __builtin_popcount.
* signal.c: Ensure that NSIG >= 32.
(sprintsigmask, sprintsigmask_long, printsigmask): Remove.
(popcount32, sprintsigmask_n): New functions.
(tprintsigmask_addr, sprintsigmask_val, tprintsigmask_val): New macros.
(print_sigset_addr_len, sys_sigsetmask, sys_sigreturn, sys_siggetmask,
sys_sigsuspend, sys_sigprocmask, decode_new_sigaction): Update to use
new signal mask decoding interface.
* tests/sigaction.c (main): Add a test with almost filled signal mask.
* tests/sigaction.awk: Update.
2014-02-26 20:51:28 +04:00
2015-03-18 22:14:02 +03:00
for ( i = 2 ; i < 5 ; i ++ ) {
o1 [ i ] = n1 [ i - 1 ]
o2 [ i ] = n2 [ i - 1 ]
}
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a1 = "(0x[0-9a-f]+, )?(4|8|16)"
a2 = "(4|8|16)(, 0x[0-9a-f]+)?"
a3 = "0x[0-9a-f]+, (4|8|16)"
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for ( i = 1 ; i < 5 ; i ++ ) {
r [ i ] = "^rt_sigaction\\(SIGUSR2, (" \
"\\{" n1 [ i ] "\\}, \\{" o1 [ i ] "\\}, " a1 "|" \
"\\{" n2 [ i ] "\\}, \\{" o2 [ i ] "\\}, " a2 "|" \
"\\{" n2 [ i ] "\\}, \\{" o2 [ i ] "\\}, " a3 ")\\) = 0$"
}
s [ 5 ] = "+++ exited with 0 +++"
lines = 5
fail = 0
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}
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@include "match.awk"