From: Eugene Syromyatnikov <evgsyr@gmail.com>
Date: Fri, 2 Sep 2016 15:28:24 +0000 (+0300)
Subject: tests: check decoding of readahead syscall
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=0c766339fee3e322151ea90573fff5773b02d28b;p=strace

tests: check decoding of readahead syscall

* configure.ac (AC_CHECK_FUNCS): Add readahead.
* tests/readahead.c: New file.
* tests/readahead.test: New test.
* tests/.gitignore: Add readahead.
* tests/Makefile.am (check_PROGRAMS): Likewise.
(DECODER_TESTS): Add readahead.test.
---

diff --git a/configure.ac b/configure.ac
index 5048de31..dc84a492 100644
--- a/configure.ac
+++ b/configure.ac
@@ -295,6 +295,7 @@ AC_CHECK_FUNCS(m4_normalize([
 	preadv
 	process_vm_readv
 	pwritev
+	readahead
 	signalfd
 	stpcpy
 	strerror
diff --git a/tests/.gitignore b/tests/.gitignore
index 5c5d0927..8c41bea6 100644
--- a/tests/.gitignore
+++ b/tests/.gitignore
@@ -185,6 +185,7 @@ pselect6
 ptrace
 pwritev
 read-write
+readahead
 readdir
 readlink
 readlinkat
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 2cf96748..0b3b818d 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -242,6 +242,7 @@ check_PROGRAMS = \
 	ptrace \
 	pwritev \
 	read-write \
+	readahead \
 	readdir \
 	readlink \
 	readlinkat \
@@ -569,6 +570,7 @@ DECODER_TESTS = \
 	ptrace.test \
 	pwritev.test \
 	read-write.test \
+	readahead.test \
 	readdir.test \
 	readlink.test \
 	readlinkat.test \
diff --git a/tests/readahead.c b/tests/readahead.c
new file mode 100644
index 00000000..5677c1ed
--- /dev/null
+++ b/tests/readahead.c
@@ -0,0 +1,102 @@
+/*
+ * Copyright (c) 2016 Eugene Syromiatnikov <evgsyr@gmail.com>
+ * 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 <asm/unistd.h>
+
+#ifdef HAVE_READAHEAD
+# ifdef __GLIBC__
+/*
+ * Check for glibc readahead off64_t argument passing bug,
+ * see https://sourceware.org/bugzilla/show_bug.cgi?id=5208
+ */
+#  if !(defined __GLIBC_MINOR__ && \
+        (__GLIBC__ << 16) + __GLIBC_MINOR__ >= (2 << 16) + 8)
+#   undef HAVE_READAHEAD
+#  endif
+# endif /* __GLIBC__ */
+#endif /* HAVE_READAHEAD */
+
+#ifdef HAVE_READAHEAD
+
+# include <fcntl.h>
+# include <stdio.h>
+
+static const int fds[] = {
+	-0x80000000,
+	-100,
+	-1,
+	0,
+	1,
+	2,
+	0x7fffffff,
+};
+
+static const off64_t offsets[] = {
+	-0x8000000000000000LL,
+	-0x5060708090a0b0c0LL,
+	-1LL,
+	 0,
+	 1,
+	 0xbadfaced,
+	 0x7fffffffffffffffLL,
+};
+
+static const unsigned long counts[] = {
+	0UL,
+	0xdeadca75,
+	(unsigned long) 0xface1e55beeff00dULL,
+	(unsigned long) 0xffffffffffffffffULL,
+};
+
+int
+main(void)
+{
+	unsigned i;
+	unsigned j;
+	unsigned k;
+	ssize_t rc;
+
+	for (i = 0; i < ARRAY_SIZE(fds); i++)
+		for (j = 0; j < ARRAY_SIZE(offsets); j++)
+			for (k = 0; k < ARRAY_SIZE(counts); k++) {
+				rc = readahead(fds[i], offsets[j], counts[k]);
+
+				printf("readahead(%d, %lld, %lu) = %s\n",
+					fds[i], (long long) offsets[j],
+					counts[k], sprintrc(rc));
+			}
+
+	puts("+++ exited with 0 +++");
+	return 0;
+}
+
+#else
+
+SKIP_MAIN_UNDEFINED("HAVE_READAHEAD")
+
+#endif
diff --git a/tests/readahead.test b/tests/readahead.test
new file mode 100755
index 00000000..397c6903
--- /dev/null
+++ b/tests/readahead.test
@@ -0,0 +1,6 @@
+#!/bin/sh
+
+# Check readahead syscall decoding.
+
+. "${srcdir=.}/init.sh"
+run_strace_match_diff -a1