Showing the changes to java/pkg/sun/reflect/Label.java (1 of 18352 files). Show all
Unified · Split
| @@ -0,0 +1,78 @@ | ||
| 1 | +/* | |
| 2 | + * Copyright (c) 2001, 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 sun.reflect; | |
| 27 | + | |
| 28 | +import java.util.Iterator; | |
| 29 | +import java.util.List; | |
| 30 | +import java.util.ArrayList; | |
| 31 | + | |
| 32 | +/** Allows forward references in bytecode streams emitted by | |
| 33 | + ClassFileAssembler. Assumes that the start of the method body is | |
| 34 | + the first byte in the assembler's buffer. May be used at more than | |
| 35 | + one branch site. */ | |
| 36 | + | |
| 37 | +class Label { | |
| 38 | + static class PatchInfo { | |
| 39 | + PatchInfo(ClassFileAssembler asm, | |
| 40 | + short instrBCI, | |
| 41 | + short patchBCI, | |
| 42 | + int stackDepth) | |
| 43 | + { | |
| 44 | + this.asm = asm; | |
| 45 | + this.instrBCI = instrBCI; | |
| 46 | + this.patchBCI = patchBCI; | |
| 47 | + this.stackDepth = stackDepth; | |
| 48 | + } | |
| 49 | + // This won't work for more than one assembler anyway, so this is | |
| 50 | + // unnecessary | |
| 51 | + ClassFileAssembler asm; | |
| 52 | + short instrBCI; | |
| 53 | + short patchBCI; | |
| 54 | + int stackDepth; | |
| 55 | + } | |
| 56 | + private List/*<PatchInfo>*/ patches = new ArrayList(); | |
| 57 | + | |
| 58 | + public Label() { | |
| 59 | + } | |
| 60 | + | |
| 61 | + void add(ClassFileAssembler asm, | |
| 62 | + short instrBCI, | |
| 63 | + short patchBCI, | |
| 64 | + int stackDepth) | |
| 65 | + { | |
| 66 | + patches.add(new PatchInfo(asm, instrBCI, patchBCI, stackDepth)); | |
| 67 | + } | |
| 68 | + | |
| 69 | + public void bind() { | |
| 70 | + for (Iterator iter = patches.iterator(); iter.hasNext(); ) { | |
| 71 | + PatchInfo patch = (PatchInfo) iter.next(); | |
| 72 | + short curBCI = patch.asm.getLength(); | |
| 73 | + short offset = (short) (curBCI - patch.instrBCI); | |
| 74 | + patch.asm.emitShort(patch.patchBCI, offset); | |
| 75 | + patch.asm.setStack(patch.stackDepth); | |
| 76 | + } | |
| 77 | + } | |
| 78 | +} | |