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https://sourceware.org/git/glibc.git
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87 lines
2.7 KiB
Bash
87 lines
2.7 KiB
Bash
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#! /bin/sh
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# Test that glibc's signal numbers match the kernel's.
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# Copyright (C) 2017 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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# <http://www.gnu.org/licenses/>.
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set -e
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if [ -n "$BASH_VERSION" ]; then set -o pipefail; fi
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LC_ALL=C; export LC_ALL
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# We cannot use Linux's asm/signal.h to define signal numbers, because
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# it isn't sufficiently namespace-clean. Instead, this test checks
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# that our signal numbers match the kernel's. This script expects
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# "$@" to be $(CC) $(CPPFLAGS) as set by glibc's Makefiles, and $AWK
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# to be set in the environment.
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# Before doing anything else, fail if the compiler doesn't work.
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"$@" -E -xc -dM - < /dev/null > /dev/null
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tmpG=`mktemp -t signums_glibc.XXXXXXXXX`
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tmpK=`mktemp -t signums_kernel.XXXXXXXXX`
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trap "rm -f '$tmpG' '$tmpK'" 0
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# Filter out constants that aren't signal numbers.
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# If SIGPOLL is defined as SIGIO, swap it around so SIGIO is defined as
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# SIGPOLL. Similarly for SIGABRT and SIGIOT.
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# Discard obsolete signal numbers and unrelated constants:
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# SIGCLD, SIGIOT, SIGSWI, SIGUNUSED.
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# SIGSTKSZ, SIGRTMIN, SIGRTMAX.
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# Then sort the list.
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filter_defines ()
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{
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$AWK '
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/^#define SIG[A-Z]+ ([0-9]+|SIG[A-Z0-9]+)$/ { signals[$2] = $3 }
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END {
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if ("SIGPOLL" in signals && "SIGIO" in signals &&
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signals["SIGPOLL"] == "SIGIO") {
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signals["SIGPOLL"] = signals["SIGIO"]
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signals["SIGIO"] = "SIGPOLL"
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}
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if ("SIGABRT" in signals && "SIGIOT" in signals &&
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signals["SIGABRT"] == "SIGIOT") {
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signals["SIGABRT"] = signals["SIGIOT"]
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signals["SIGIOT"] = "SIGABRT"
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}
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for (sig in signals) {
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if (sig !~ /^SIG(CLD|IOT|RT(MIN|MAX)|STKSZ|SWI|UNUSED)$/) {
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printf("#define %s %s\n", sig, signals[sig])
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}
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}
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}' | sort
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}
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# $CC may contain command-line switches, so it should be word-split.
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printf '%s' '#define _GNU_SOURCE 1
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#include <signal.h>
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' |
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"$@" -E -xc -dM - |
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filter_defines > "$tmpG"
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printf '%s' '#define _GNU_SOURCE 1
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#define __ASSEMBLER__ 1
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#include <asm/signal.h>
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' |
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"$@" -E -xc -dM - |
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filter_defines > "$tmpK"
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if cmp -s "$tmpG" "$tmpK"; then
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exit 0
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else
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diff -u "$tmpG" "$tmpK"
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exit 1
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fi
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