tests: check decoding of prlimit64 syscall

* tests/prlimit64.c: New file.
* tests/prlimit64.test: New test.
* tests/.gitignore: Add prlimit64.
* tests/Makefile.am (check_PROGRAMS): Likewise.
(DECODER_TESTS): Add prlimit64.test.

tests/.gitignore

@@ -165,6 +165,7 @@ pread64-pwrite64
 preadv
 preadv-pwritev
 preadv2-pwritev2
+prlimit64
 pselect6
 ptrace
 pwritev

tests/Makefile.am

@@ -218,6 +218,7 @@ check_PROGRAMS = \
 	preadv \
 	preadv-pwritev \
 	preadv2-pwritev2 \
+	prlimit64 \
 	pselect6 \
 	ptrace \
 	pwritev \
@@ -515,6 +516,7 @@ DECODER_TESTS = \
 	preadv-pwritev.test \
 	preadv2-pwritev2.test \
 	preadv.test \
+	prlimit64.test \
 	pselect6.test \
 	ptrace.test \
 	pwritev.test \

tests/prlimit64.c

@@ -0,0 +1,92 @@
+/*
+ * Check decoding of prlimit64 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_prlimit64
+
+# include <inttypes.h>
+# include <stdio.h>
+# include <stdint.h>
+# include <sys/resource.h>
+# include <unistd.h>
+
+# include "xlat.h"
+# include "xlat/resources.h"
+
+const char *
+sprint_rlim(uint64_t lim)
+{
+	if (lim == -1ULL)
+		return "RLIM64_INFINITY";
+
+	static char buf[2][sizeof(lim)*3 + sizeof("*1024")];
+	static int i;
+	i &= 1;
+	if (lim > 1024 && lim % 1024 == 0)
+		sprintf(buf[i], "%" PRIu64 "*1024", lim / 1024);
+	else
+		sprintf(buf[i], "%" PRIu64, lim);
+
+	return buf[i++];
+}
+
+int
+main(void)
+{
+	unsigned long pid =
+		(unsigned long) 0xdefaced00000000 | (unsigned) getpid();
+	uint64_t *const rlimit = tail_alloc(sizeof(*rlimit) * 2);
+	const struct xlat *xlat;
+
+	for (xlat = resources; xlat->str; ++xlat) {
+		unsigned long res = 0xfacefeed00000000 | xlat->val;
+		long rc = syscall(__NR_prlimit64, pid, res, 0, rlimit);
+		if (rc)
+			printf("prlimit64(%d, %s, NULL, %p) = %ld %s (%m)\n",
+			       (unsigned) pid, xlat->str, rlimit,
+			       rc, errno2name());
+		else
+			printf("prlimit64(%d, %s, NULL"
+			       ", {rlim_cur=%s, rlim_max=%s}) = 0\n",
+			       (unsigned) pid, xlat->str,
+			       sprint_rlim(rlimit[0]),
+			       sprint_rlim(rlimit[1]));
+	}
+
+	puts("+++ exited with 0 +++");
+	return 0;
+}
+
+#else
+
+SKIP_MAIN_UNDEFINED("__NR_prlimit64")
+
+#endif

tests/prlimit64.test

@@ -0,0 +1,6 @@
+#!/bin/sh
+
+# Check decoding of prlimit64 syscall.
+
+. "${srcdir=.}/init.sh"
+run_strace_match_diff