• file
• revisions
• annotate
• diff
• comparison
• raw

test/runtime/classFileParserBug/BadNameAndType.java@9d07e8518392 (annotated)

test/runtime/classFileParserBug/BadNameAndType.java

Tue, 12 Jul 2016 22:31:57 +0000

author

poonam

date

Tue, 12 Jul 2016 22:31:57 +0000

changeset 8454

9d07e8518392

permissions

-rw-r--r--

8042660: vm/mlvm/anonloader/stress/byteMutation failed with: assert(index >=0 && index < _length) failed: symbol index overflow
Summary: Detect zero length signatures and throw ClassFormatError before bad dereference occurs
Reviewed-by: hseigel

poonam@8454	1	/*
poonam@8454	2	* Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
poonam@8454	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
poonam@8454	4	*
poonam@8454	5	* This code is free software; you can redistribute it and/or modify it
poonam@8454	6	* under the terms of the GNU General Public License version 2 only, as
poonam@8454	7	* published by the Free Software Foundation.
poonam@8454	8	*
poonam@8454	9	* This code is distributed in the hope that it will be useful, but WITHOUT
poonam@8454	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
poonam@8454	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
poonam@8454	12	* version 2 for more details (a copy is included in the LICENSE file that
poonam@8454	13	* accompanied this code).
poonam@8454	14	*
poonam@8454	15	* You should have received a copy of the GNU General Public License version
poonam@8454	16	* 2 along with this work; if not, write to the Free Software Foundation,
poonam@8454	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
poonam@8454	18	*
poonam@8454	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
poonam@8454	20	* or visit www.oracle.com if you need additional information or have any
poonam@8454	21	* questions.
poonam@8454	22	*
poonam@8454	23	*/
poonam@8454	24
poonam@8454	25	/*
poonam@8454	26	* @test
poonam@8454	27	* @bug 8042660
poonam@8454	28	* @summary Constant pool NameAndType entries must point to non-zero length Utf8 strings
poonam@8454	29	* @compile emptySigUtf8.jcod
poonam@8454	30	* @compile emptyNameUtf8.jcod
poonam@8454	31	* @run main/othervm -Xverify:all BadNameAndType
poonam@8454	32	*/
poonam@8454	33
poonam@8454	34	// Test that a constant pool NameAndType descriptor_index and/or name_index
poonam@8454	35	// that points to a zero length Utf8 string causes a ClassFormatError.
poonam@8454	36	public class BadNameAndType {
poonam@8454	37	public static void main(String args[]) throws Throwable {
poonam@8454	38
poonam@8454	39	System.out.println("Regression test for bug 8042660");
poonam@8454	40
poonam@8454	41	// Test descriptor_index pointing to zero-length string.
poonam@8454	42	try {
poonam@8454	43	Class newClass = Class.forName("emptySigUtf8");
poonam@8454	44	throw new RuntimeException("Expected ClassFormatError exception not thrown");
poonam@8454	45	} catch (java.lang.ClassFormatError e) {
poonam@8454	46	System.out.println("Test BadNameAndType passed test case emptySigUtf8");
poonam@8454	47	}
poonam@8454	48
poonam@8454	49	// Test name_index pointing to zero-length string.
poonam@8454	50	try {
poonam@8454	51	Class newClass = Class.forName("emptyNameUtf8");
poonam@8454	52	throw new RuntimeException("Expected ClassFormatError exception not thrown");
poonam@8454	53	} catch (java.lang.ClassFormatError e) {
poonam@8454	54	System.out.println("Test BadNameAndType passed test case emptyNameUtf8");
poonam@8454	55	}
poonam@8454	56	}
poonam@8454	57	}