tests: add a test for get_robust_list and set_robust_list decoding

* tests/xet_robust_list.c: New file.
* tests/xet_robust_list.test: New test.
* tests/Makefile.am (check_PROGRAMS): Add xet_robust_list.
(TESTS): Add xet_robust_list.test.
* tests/.gitignore: Add xet_robust_list.

tests/.gitignore

@@ -49,6 +49,7 @@ umovestr2
 unix-pair-send-recv
 utime
 xattr
+xet_robust_list
 *.log
 *.log.*
 *.o

tests/Makefile.am

@@ -59,7 +59,9 @@ check_PROGRAMS = \
 	umovestr2 \
 	unix-pair-send-recv \
 	utime \
-	xattr
+	xattr \
+	xet_robust_list \
+	# end of check_PROGRAMS
 
 filter_unavailable_LDADD = -lpthread
 mmap64_CFLAGS = $(AM_CFLAGS) -D_FILE_OFFSET_BITS=64
@@ -126,6 +128,7 @@ TESTS = \
 	uio.test \
 	utime.test \
 	xattr.test \
+	xet_robust_list.test \
 	count.test \
 	detach-sleeping.test \
 	detach-stopped.test \

tests/xet_robust_list.c

@@ -0,0 +1,55 @@
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <stdio.h>
+#include <unistd.h>
+#include <sys/mman.h>
+#include <sys/syscall.h>
+
+#if defined __NR_get_robust_list && defined __NR_set_robust_list
+
+int
+main(void)
+{
+	const size_t page_len = sysconf(_SC_PAGESIZE);
+	const pid_t pid = getpid();
+	const long long_pid = (unsigned long) (0xdeadbeef00000000LL | pid);
+
+	void *p = mmap(NULL, page_len * 4, PROT_READ | PROT_WRITE,
+		       MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
+	if (p == MAP_FAILED ||
+	    mprotect(p + page_len, page_len, PROT_NONE) ||
+	    mprotect(p + page_len * 3, page_len, PROT_NONE))
+		return 77;
+
+	void **p_head = p + page_len - sizeof(void *);
+	size_t *p_len = p + page_len * 3 - sizeof(size_t);
+
+	if (syscall(__NR_get_robust_list, long_pid, p_head, p_len))
+		return 77;
+	printf("get_robust_list\\(%d, \\[%#lx\\], \\[%lu\\]\\) += 0\n",
+	       (int) pid, (unsigned long) *p_head, (unsigned long) *p_len);
+
+	if (syscall(__NR_set_robust_list, p, *p_len))
+		return 77;
+	printf("set_robust_list\\(%#lx, %lu\\) += 0\n",
+	       (unsigned long) p, (unsigned long) *p_len);
+
+	if (syscall(__NR_get_robust_list, long_pid, p_head, p_len))
+		return 77;
+	printf("get_robust_list\\(%d, \\[%#lx\\], \\[%lu\\]\\) += 0\n",
+	       (int) pid, (unsigned long) *p_head, (unsigned long) *p_len);
+
+	return 0;
+}
+
+#else
+
+int
+main(void)
+{
+	return 77;
+}
+
+#endif

tests/xet_robust_list.test

@@ -0,0 +1,13 @@
+#!/bin/sh
+
+# Check get_robust_list and set_robust_list syscalls decoding.
+
+. "${srcdir=.}/init.sh"
+
+run_prog > /dev/null
+OUT="$LOG.out"
+run_strace -eget_robust_list,set_robust_list $args > "$OUT"
+match_grep "$LOG" "$OUT"
+rm -f "$OUT"
+
+exit 0