Mercurial > hg > graal-compiler
diff test/runtime/memory/ReserveMemory.java @ 10157:f32b6c267d2e
8012015: Use PROT_NONE when reserving memory
Summary: Reserved memory had PROT_READ+PROT_WRITE access on Linux/bsd, now changed to PROT_NONE.
Reviewed-by: dholmes, ctornqvi
author | mikael |
---|---|
date | Mon, 29 Apr 2013 11:03:49 -0700 |
parents | |
children | f54c85acc043 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/test/runtime/memory/ReserveMemory.java Mon Apr 29 11:03:49 2013 -0700 @@ -0,0 +1,78 @@ +/* + * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ + +/* + * @test + * @key regression + * @bug 8012015 + * @summary Make sure reserved (but uncommitted) memory is not accessible + * @library /testlibrary /testlibrary/whitebox + * @build ReserveMemory + * @run main ClassFileInstaller sun.hotspot.WhiteBox + * @run main ReserveMemory + */ + +import com.oracle.java.testlibrary.*; + +import java.lang.reflect.Field; +import sun.hotspot.WhiteBox; +import sun.misc.Unsafe; + +public class ReserveMemory { + private static Unsafe getUnsafe() throws Exception { + Field f = Unsafe.class.getDeclaredField("theUnsafe"); + f.setAccessible(true); + return (Unsafe)f.get(null); + } + + private static boolean isWindows() { + return System.getProperty("os.name").toLowerCase().startsWith("win"); + } + + public static void main(String args[]) throws Exception { + if (args.length > 0) { + long address = WhiteBox.getWhiteBox().reserveMemory(4096); + + System.out.println("Reserved memory at address: 0x" + Long.toHexString(address)); + System.out.println("Will now read from the address, expecting a crash!"); + + int x = getUnsafe().getInt(address); + + throw new Exception("Read of reserved/uncommitted memory unexpectedly succeeded, expected crash!"); + } + + ProcessBuilder pb = ProcessTools.createJavaProcessBuilder( + "-Xbootclasspath/a:.", + "-XX:+UnlockDiagnosticVMOptions", + "-XX:+WhiteBoxAPI", + "ReserveMemory", + "test"); + + OutputAnalyzer output = new OutputAnalyzer(pb.start()); + if (isWindows()) { + output.shouldContain("EXCEPTION_ACCESS_VIOLATION"); + } else { + output.shouldContain("SIGSEGV"); + } + } +}