tests: check decoding of socketcall syscall

* tests/socketcall.c: New file.
* tests/socketcall.test: New test.
* tests/.gitignore: Add socketcall.
* tests/Makefile.am (check_PROGRAMS): Likewise.
(DECODER_TESTS): Add socketcall.test.

tests/.gitignore

@@ -250,6 +250,7 @@ signal_receive
 signalfd
 sigreturn
 sleep
+socketcall
 splice
 stack-fcall
 stat

tests/Makefile.am

@@ -306,6 +306,7 @@ check_PROGRAMS = \
 	signalfd \
 	sigreturn \
 	sleep \
+	socketcall \
 	splice \
 	stack-fcall \
 	stat \
@@ -625,6 +626,7 @@ DECODER_TESTS = \
 	siginfo.test \
 	signalfd.test \
 	sigreturn.test \
+	socketcall.test \
 	splice.test \
 	stat.test \
 	stat64.test \

tests/socketcall.c

@@ -0,0 +1,104 @@
+/*
+ * Check decoding of socketcall syscall.
+ *
+ * Copyright (c) 2016 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.
+ */
+
+#include "tests.h"
+#include <sys/syscall.h>
+
+#ifdef __NR_socketcall
+
+# include <assert.h>
+# include <stdio.h>
+# include <unistd.h>
+
+# include "xlat.h"
+# include "xlat/socketcalls.h"
+
+static const char *
+xlookup_uint(const struct xlat *xlat, const unsigned int val)
+{
+	for (; xlat->str != NULL; xlat++)
+		if (xlat->val == val)
+			return xlat->str;
+	return NULL;
+}
+
+static const int sc_min = 1, sc_max = 20;
+static void *efault;
+
+static void
+test_socketcall(const int i, const void *const addr)
+{
+	static const unsigned long a[] = {
+		(unsigned long) 0xface2fedbadc2ded,
+		(unsigned long) 0xface3fedbadc3ded,
+		(unsigned long) 0xface4fedbadc4ded,
+		(unsigned long) 0xface5fedbadc5ded
+	};
+	const unsigned long call =
+		(unsigned long) 0xfacefeed00000000 | (unsigned int) i;
+
+	long rc = syscall(__NR_socketcall, call, addr,
+			  a[0], a[1], a[2], a[3]);
+
+	if (i < sc_min || i > sc_max) {
+		printf("socketcall(%d, %p, %#lx, %#lx, %#lx, %#lx)"
+		       " = %ld %s (%m)\n", (int) call, addr,
+		       a[0], a[1], a[2], a[3], rc, errno2name());
+	} else if (addr == efault) {
+		const char *const str = xlookup_uint(socketcalls, i);
+		assert(str);
+		printf("socketcall(%s, %p, %#lx, %#lx, %#lx, %#lx)"
+		       " = %ld %s (%m)\n", str, addr, a[0], a[1], a[2], a[3],
+		       rc, errno2name());
+	}
+}
+int
+main(void)
+{
+	assert((unsigned) sc_min == socketcalls[0].val);
+	assert((unsigned) sc_max == socketcalls[ARRAY_SIZE(socketcalls) - 2].val);
+
+	const unsigned long *const args = tail_alloc(sizeof(*args) * 6);
+	efault = tail_alloc(1) + 1;
+
+	int i;
+	for (i = sc_min - 3; i <= sc_max + 3; ++i) {
+		test_socketcall(i, efault);
+		test_socketcall(i, args);
+	}
+
+	puts("+++ exited with 0 +++");
+	return 0;
+}
+
+#else
+
+SKIP_MAIN_UNDEFINED("__NR_socketcall")
+
+#endif

tests/socketcall.test

@@ -0,0 +1,6 @@
+#!/bin/sh
+
+# Check decoding of socketcall syscall.
+
+. "${srcdir=.}/init.sh"
+run_strace_match_diff