1 files changed, 86 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/tst-signal-numbers.sh b/sysdeps/unix/sysv/linux/tst-signal-numbers.sh
new file mode 100644
index 0000000000..e1f7be0337
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/tst-signal-numbers.sh
@@ -0,0 +1,86 @@
+#! /bin/sh
+# Test that glibc's signal numbers match the kernel's.
+# Copyright (C) 2017-2018 Free Software Foundation, Inc.
+# This file is part of the GNU C Library.
+
+# The GNU C Library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+
+# The GNU C Library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+
+# You should have received a copy of the GNU Lesser General Public
+# License along with the GNU C Library; if not, see
+# <http://www.gnu.org/licenses/>.
+
+set -e
+if [ -n "$BASH_VERSION" ]; then set -o pipefail; fi
+LC_ALL=C; export LC_ALL
+
+# We cannot use Linux's asm/signal.h to define signal numbers, because
+# it isn't sufficiently namespace-clean.  Instead, this test checks
+# that our signal numbers match the kernel's.  This script expects
+# "$@" to be $(CC) $(CPPFLAGS) as set by glibc's Makefiles, and $AWK
+# to be set in the environment.
+
+# Before doing anything else, fail if the compiler doesn't work.
+"$@" -E -xc -dM - < /dev/null > /dev/null
+
+tmpG=`mktemp -t signums_glibc.XXXXXXXXX`
+tmpK=`mktemp -t signums_kernel.XXXXXXXXX`
+trap "rm -f '$tmpG' '$tmpK'" 0
+
+# Filter out constants that aren't signal numbers.
+# If SIGPOLL is defined as SIGIO, swap it around so SIGIO is defined as
+# SIGPOLL. Similarly for SIGABRT and SIGIOT.
+# Discard obsolete signal numbers and unrelated constants:
+#    SIGCLD, SIGIOT, SIGSWI, SIGUNUSED.
+#    SIGSTKSZ, SIGRTMIN, SIGRTMAX.
+# Then sort the list.
+filter_defines ()
+{
+    $AWK '
+/^#define SIG[A-Z]+ ([0-9]+|SIG[A-Z0-9]+)$/ { signals[$2] = $3 }
+END {
+  if ("SIGPOLL" in signals && "SIGIO" in signals &&
+      signals["SIGPOLL"] == "SIGIO") {
+    signals["SIGPOLL"] = signals["SIGIO"]
+    signals["SIGIO"] = "SIGPOLL"
+  }
+  if ("SIGABRT" in signals && "SIGIOT" in signals &&
+      signals["SIGABRT"] == "SIGIOT") {
+    signals["SIGABRT"] = signals["SIGIOT"]
+    signals["SIGIOT"] = "SIGABRT"
+  }
+  for (sig in signals) {
+    if (sig !~ /^SIG(CLD|IOT|RT(MIN|MAX)|STKSZ|SWI|UNUSED)$/) {
+      printf("#define %s %s\n", sig, signals[sig])
+    }
+  }
+}' | sort
+}
+
+# $CC may contain command-line switches, so it should be word-split.
+printf '%s' '#define _GNU_SOURCE 1
+#include <signal.h>
+' |
+    "$@" -E -xc -dM - |
+    filter_defines > "$tmpG"
+
+printf '%s' '#define _GNU_SOURCE 1
+#define __ASSEMBLER__ 1
+#include <asm/signal.h>
+' |
+    "$@" -E -xc -dM - |
+    filter_defines > "$tmpK"
+
+if cmp -s "$tmpG" "$tmpK"; then
+    exit 0
+else
+    diff -u "$tmpG" "$tmpK"
+    exit 1
+fi