1 /* 2 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package jdk.internal.vm.annotation; 27 28 import java.lang.annotation.ElementType; 29 import java.lang.annotation.Retention; 30 import java.lang.annotation.RetentionPolicy; 31 import java.lang.annotation.Target; 32 33 // Android-note: ReservedStackAccess-specific implementation not available on Android. 34 /** 35 * <p>An annotation expressing that a method is especially sensitive 36 * to stack overflows. This is a hint the JVM can use to grant access to 37 * extra stack space when executing this code if such feature is supported 38 * by the JVM. The JVM is free to ignore this annotation. 39 * 40 * A possible way for the JVM to improve the execution context for methods 41 * with this annotation is to reserve part of the thread's execution stack 42 * for them. Access to this section of the stack would be denied by default 43 * but could be granted if the JVM detects a possible stack overflow and 44 * the thread's call stack includes at least one annotated method. Even if 45 * access to this reserved area has been granted, the JVM might decide to 46 * throw a delayed StackOverflowError when the thread exits the annotated 47 * method. 48 * 49 * @since 9 50 */ 51 // Android-changed: RetentionPolicy.SOURCE is sufficient as this is no-op on Android. 52 // @Retention(RetentionPolicy.RUNTIME) 53 @Retention(RetentionPolicy.SOURCE) 54 @Target({ElementType.METHOD, ElementType.CONSTRUCTOR}) 55 public @interface ReservedStackAccess { } 56 57