diff options
Diffstat (limited to 'tools/external/asm/org/objectweb/asm/util/attrs/ASMStackMapTableAttribute.java')
| -rw-r--r-- | tools/external/asm/org/objectweb/asm/util/attrs/ASMStackMapTableAttribute.java | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/tools/external/asm/org/objectweb/asm/util/attrs/ASMStackMapTableAttribute.java b/tools/external/asm/org/objectweb/asm/util/attrs/ASMStackMapTableAttribute.java new file mode 100644 index 000000000..b878357d6 --- /dev/null +++ b/tools/external/asm/org/objectweb/asm/util/attrs/ASMStackMapTableAttribute.java @@ -0,0 +1,214 @@ +/** + * ASM: a very small and fast Java bytecode manipulation framework + * Copyright (c) 2000-2005 INRIA, France Telecom + * 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. Neither the name of the copyright holders nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT OWNER OR CONTRIBUTORS 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. + */ +package org.objectweb.asm.util.attrs; + +import java.util.List; +import java.util.Map; + +import org.objectweb.asm.Attribute; +import org.objectweb.asm.ClassReader; +import org.objectweb.asm.Label; +import org.objectweb.asm.attrs.StackMapTableAttribute; +import org.objectweb.asm.attrs.StackMapFrame; +import org.objectweb.asm.attrs.StackMapType; + +/** + * An {@link ASMifiable} {@link StackMapTableAttribute} sub class. + * + * @author Eugene Kuleshov + */ +public class ASMStackMapTableAttribute extends StackMapTableAttribute implements + ASMifiable, + Traceable +{ + /** + * Length of the attribute used for comparison + */ + private int len; + + public ASMStackMapTableAttribute() { + super(); + } + + public ASMStackMapTableAttribute(List frames, int len) { + super(frames); + this.len = len; + } + + protected Attribute read( + ClassReader cr, + int off, + int len, + char[] buf, + int codeOff, + Label[] labels) + { + StackMapTableAttribute attr = (StackMapTableAttribute) super.read(cr, + off, + len, + buf, + codeOff, + labels); + + return new ASMStackMapTableAttribute(attr.getFrames(), len); + } + + public void asmify(StringBuffer buf, String varName, Map labelNames) { + List frames = getFrames(); + if (frames.size() == 0) { + buf.append("List frames = Collections.EMPTY_LIST;\n"); + } else { + buf.append("List frames = new ArrayList();\n"); + for (int i = 0; i < frames.size(); i++) { + buf.append("{\n"); + StackMapFrame f = (StackMapFrame) frames.get(i); + declareLabel(buf, labelNames, f.label); + + String frameVar = varName + "frame" + i; + asmifyTypeInfo(buf, frameVar, labelNames, f.locals, "locals"); + asmifyTypeInfo(buf, frameVar, labelNames, f.stack, "stack"); + + buf.append("StackMapFrame ") + .append(frameVar) + .append(" = new StackMapFrame(") + .append(labelNames.get(f.label)) + .append(", locals, stack);\n"); + buf.append("frames.add(").append(frameVar).append(");\n"); + buf.append("}\n"); + } + } + buf.append("StackMapTableAttribute ").append(varName); + buf.append(" = new StackMapTableAttribute(frames);\n"); + } + + void asmifyTypeInfo( + StringBuffer buf, + String varName, + Map labelNames, + List infos, + String field) + { + if (infos.size() == 0) { + buf.append("List ") + .append(field) + .append(" = Collections.EMPTY_LIST;\n"); + } else { + buf.append("List ").append(field).append(" = new ArrayList();\n"); + buf.append("{\n"); + for (int i = 0; i < infos.size(); i++) { + StackMapType typeInfo = (StackMapType) infos.get(i); + String localName = varName + "Info" + i; + int type = typeInfo.getType(); + buf.append("StackMapType ") + .append(localName) + .append(" = StackMapType.getTypeInfo( StackMapType.ITEM_") + .append(StackMapType.ITEM_NAMES[type]) + .append(");\n"); + + switch (type) { + case StackMapType.ITEM_Object: // + buf.append(localName) + .append(".setObject(\"") + .append(typeInfo.getObject()) + .append("\");\n"); + break; + + case StackMapType.ITEM_Uninitialized: // + declareLabel(buf, labelNames, typeInfo.getLabel()); + buf.append(localName) + .append(".setLabel(") + .append(labelNames.get(typeInfo.getLabel())) + .append(");\n"); + break; + } + buf.append(field) + .append(".add(") + .append(localName) + .append(");\n"); + } + buf.append("}\n"); + } + } + + static void declareLabel(StringBuffer buf, Map labelNames, Label l) { + String name = (String) labelNames.get(l); + if (name == null) { + name = "l" + labelNames.size(); + labelNames.put(l, name); + buf.append("Label ").append(name).append(" = new Label();\n"); + } + } + + public void trace(StringBuffer buf, Map labelNames) { + List frames = getFrames(); + buf.append("[\n"); + for (int i = 0; i < frames.size(); i++) { + StackMapFrame f = (StackMapFrame) frames.get(i); + + buf.append(" Frame:"); + appendLabel(buf, labelNames, f.label); + + buf.append(" locals["); + traceTypeInfo(buf, labelNames, f.locals); + buf.append("]"); + buf.append(" stack["); + traceTypeInfo(buf, labelNames, f.stack); + buf.append("]\n"); + } + buf.append(" ] length:").append(len).append("\n"); + } + + private void traceTypeInfo(StringBuffer buf, Map labelNames, List infos) { + String sep = ""; + for (int i = 0; i < infos.size(); i++) { + StackMapType t = (StackMapType) infos.get(i); + + buf.append(sep).append(StackMapType.ITEM_NAMES[t.getType()]); + sep = ", "; + if (t.getType() == StackMapType.ITEM_Object) { + buf.append(":").append(t.getObject()); + } + if (t.getType() == StackMapType.ITEM_Uninitialized) { + buf.append(":"); + appendLabel(buf, labelNames, t.getLabel()); + } + } + } + + protected void appendLabel(StringBuffer buf, Map labelNames, Label l) { + String name = (String) labelNames.get(l); + if (name == null) { + name = "L" + labelNames.size(); + labelNames.put(l, name); + } + buf.append(name); + } + +} |