From: Dmitry V. Levin <ldv@altlinux.org>
Date: Wed, 2 Aug 2017 00:44:28 +0000 (+0000)
Subject: tests: add test_printstrn function to libtests
X-Git-Tag: v4.19~186
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=4341074ee180a70925acfd6632e4b68225ea74e7;p=strace

tests: add test_printstrn function to libtests

* tests/test_ucopy.h (test_printstrn): New prototype.
* tests/test_printstrn.c: New file.
* tests/Makefile.am (libtests_a_SOURCES): Add it.
---

diff --git a/tests/Makefile.am b/tests/Makefile.am
index 60a69844..77a96d05 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -66,6 +66,7 @@ libtests_a_SOURCES = \
 	test_netlink.h \
 	test_nlattr.h \
 	test_printpath.c \
+	test_printstrn.c \
 	test_ucopy.c \
 	test_ucopy.h \
 	tests.h \
diff --git a/tests/test_printstrn.c b/tests/test_printstrn.c
new file mode 100644
index 00000000..bc9c7752
--- /dev/null
+++ b/tests/test_printstrn.c
@@ -0,0 +1,102 @@
+/*
+ * Test printstrn/umoven.
+ *
+ * Copyright (c) 2015-2017 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 <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <asm/unistd.h>
+
+#include "scno.h"
+#include "test_ucopy.h"
+
+static const char *errstr;
+
+static void add_key(const char *addr, const unsigned int len)
+{
+	errstr = sprintrc(syscall(__NR_add_key, 0, 0, addr, len, -1));
+}
+
+static void
+test_printstrn_at(char *const p, const unsigned int test_max)
+{
+	unsigned int i;
+
+	for (i = 0; i <= test_max; ++i) {
+		add_key(p + (test_max - i), i);
+		printf("add_key(NULL, NULL, \"%.*s\", %u"
+		       ", KEY_SPEC_THREAD_KEYRING) = %s\n",
+		       (int) i, p + (test_max - i), i, errstr);
+	}
+}
+
+static void
+test_efault(const unsigned int test_max)
+{
+	char *p = tail_alloc(test_max);
+	memset(p, '/', test_max);
+	unsigned int i;
+
+	for (i = 0; i <= test_max; ++i) {
+		unsigned int j;
+		for (j = 1; j <= sizeof(long); ++j) {
+			add_key(p + (test_max - i), i + j);
+			printf("add_key(NULL, NULL, %p, %u"
+			       ", KEY_SPEC_THREAD_KEYRING) = %s\n",
+			       p + (test_max - i), i + j, errstr);
+		}
+	}
+}
+
+void
+test_printstrn(const unsigned int test_max)
+{
+	/*
+	 * abcdefgh|
+	 * abcdefg|h
+	 * abcdef|gh
+	 * abcde|fgh
+	 * abcd|efgh
+	 * abc|defgh
+	 * ab|cdefgh
+	 * a|bcdefgh
+	 * |abcdefgh
+	 */
+	const unsigned int page_size = get_page_size();
+	char *p = tail_alloc(test_max + page_size);
+	fill_memory_ex(p, test_max + page_size, 'a', 'z' - 'a' + 1);
+
+	unsigned int i;
+	for (i = 1; i <= sizeof(long); ++i)
+		test_printstrn_at(p + i, test_max);
+	for (i = 0; i < sizeof(long); ++i)
+		test_printstrn_at(p + page_size - i, test_max);
+	test_efault(test_max);
+}
diff --git a/tests/test_ucopy.h b/tests/test_ucopy.h
index 4003bbb0..30d1c11d 100644
--- a/tests/test_ucopy.h
+++ b/tests/test_ucopy.h
@@ -8,3 +8,6 @@ test_ptrace_peekdata(void);
 
 extern void
 test_printpath(unsigned int test_max_size);
+
+extern void
+test_printstrn(unsigned int test_max_size);