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@ -17,18 +17,18 @@ package org.jetbrains.java.decompiler.struct; |
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import org.jetbrains.java.decompiler.code.*; |
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import org.jetbrains.java.decompiler.struct.attr.StructGeneralAttribute; |
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import org.jetbrains.java.decompiler.struct.attr.StructLocalVariableTableAttribute; |
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import org.jetbrains.java.decompiler.struct.consts.ConstantPool; |
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import org.jetbrains.java.decompiler.struct.lazy.LazyLoader; |
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import org.jetbrains.java.decompiler.util.DataInputFullStream; |
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import org.jetbrains.java.decompiler.util.VBStyleCollection; |
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import java.io.ByteArrayInputStream; |
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import java.io.ByteArrayOutputStream; |
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import java.io.DataOutputStream; |
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import java.io.IOException; |
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import java.util.ArrayList; |
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import java.util.List; |
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import static org.jetbrains.java.decompiler.code.CodeConstants.*; |
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/* |
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method_info { |
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u2 access_flags; |
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@ -38,246 +38,85 @@ import java.util.List; |
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attribute_info attributes[attributes_count]; |
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} |
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*/ |
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public class StructMethod extends StructMember { |
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public class StructMethod implements CodeConstants { |
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// *****************************************************************************
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// public fields
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// *****************************************************************************
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public int name_index; |
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public int descriptor_index; |
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// *****************************************************************************
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// private fields
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// *****************************************************************************
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private static final int[] opr_iconst = new int[]{-1, 0, 1, 2, 3, 4, 5}; |
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private static final int[] opr_loadstore = new int[]{0, 1, 2, 3, 0, 1, 2, 3, 0, 1, 2, 3, 0, 1, 2, 3, 0, 1, 2, 3}; |
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private static final int[] opcs_load = new int[]{opc_iload, opc_lload, opc_fload, opc_dload, opc_aload}; |
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private static final int[] opcs_store = new int[]{opc_istore, opc_lstore, opc_fstore, opc_dstore, opc_astore}; |
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private int accessFlags; |
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private VBStyleCollection<StructGeneralAttribute, String> attributes; |
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private int localVariables; |
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private int maxStack; |
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private static final int[] opr_iconst = {-1, 0, 1, 2, 3, 4, 5}; |
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private static final int[] opr_loadstore = {0, 1, 2, 3, 0, 1, 2, 3, 0, 1, 2, 3, 0, 1, 2, 3, 0, 1, 2, 3}; |
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private static final int[] opcs_load = {opc_iload, opc_lload, opc_fload, opc_dload, opc_aload}; |
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private static final int[] opcs_store = {opc_istore, opc_lstore, opc_fstore, opc_dstore, opc_astore}; |
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private String name; |
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private String descriptor; |
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private InstructionSequence seq; |
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private final StructClass classStruct; |
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private final String name; |
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private final String descriptor; |
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private boolean containsCode = false; |
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private int localVariables = 0; |
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private int codeLength = 0; |
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private int codeFullLength = 0; |
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private InstructionSequence seq; |
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private boolean expanded = false; |
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private StructClass classStruct; |
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// lazy properties
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private boolean lazy; |
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private boolean expanded; |
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private byte[] code_content; |
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private int code_length = 0; |
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private int code_fulllength = 0; |
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// *****************************************************************************
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// constructors
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// *****************************************************************************
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public StructMethod(DataInputFullStream in, boolean own, StructClass clstruct) throws IOException { |
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this(in, true, own, clstruct); |
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} |
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public StructMethod(DataInputFullStream in, boolean lazy, boolean own, StructClass clstruct) throws IOException { |
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this.lazy = lazy; |
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this.expanded = !lazy; |
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this.classStruct = clstruct; |
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public StructMethod(DataInputFullStream in, StructClass clStruct) throws IOException { |
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classStruct = clStruct; |
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accessFlags = in.readUnsignedShort(); |
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name_index = in.readUnsignedShort(); |
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descriptor_index = in.readUnsignedShort(); |
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int nameIndex = in.readUnsignedShort(); |
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int descriptorIndex = in.readUnsignedShort(); |
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ConstantPool pool = clstruct.getPool(); |
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initStrings(pool, clstruct.this_class); |
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VBStyleCollection<StructGeneralAttribute, String> lstAttribute = new VBStyleCollection<StructGeneralAttribute, String>(); |
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int len = in.readUnsignedShort(); |
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for (int i = 0; i < len; i++) { |
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ConstantPool pool = clStruct.getPool(); |
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String[] values = pool.getClassElement(ConstantPool.METHOD, clStruct.qualifiedName, nameIndex, descriptorIndex); |
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name = values[0]; |
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descriptor = values[1]; |
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int attr_nameindex = in.readUnsignedShort(); |
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String attrname = pool.getPrimitiveConstant(attr_nameindex).getString(); |
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attributes = readAttributes(in, pool); |
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} |
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if (StructGeneralAttribute.ATTRIBUTE_CODE.equals(attrname)) { |
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if (!own) { |
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@Override |
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protected StructGeneralAttribute readAttribute(DataInputFullStream in, ConstantPool pool, String name) throws IOException { |
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if (StructGeneralAttribute.ATTRIBUTE_CODE.equals(name)) { |
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if (!classStruct.isOwn()) { |
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// skip code in foreign classes
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in.skip(8); |
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in.skip(in.readInt()); |
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in.skip(8 * in.readUnsignedShort()); |
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in.discard(8); |
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in.discard(in.readInt()); |
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in.discard(8 * in.readUnsignedShort()); |
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} |
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else { |
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containsCode = true; |
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in.skip(4); |
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maxStack = in.readUnsignedShort(); |
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in.discard(6); |
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localVariables = in.readUnsignedShort(); |
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if (lazy) { |
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code_length = in.readInt(); |
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in.skip(code_length); |
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codeLength = in.readInt(); |
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in.discard(codeLength); |
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int exc_length = in.readUnsignedShort(); |
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code_fulllength = code_length + exc_length * 8 + 2; |
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in.skip(exc_length * 8); |
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} |
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else { |
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seq = parseBytecode(in, in.readInt(), pool); |
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} |
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} |
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// code attributes
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int length = in.readUnsignedShort(); |
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for (int j = 0; j < length; j++) { |
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int codeattr_nameindex = in.readUnsignedShort(); |
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String codeattrname = pool.getPrimitiveConstant(codeattr_nameindex).getString(); |
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readAttribute(in, pool, lstAttribute, codeattr_nameindex, codeattrname); |
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} |
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} |
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else { |
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readAttribute(in, pool, lstAttribute, attr_nameindex, attrname); |
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} |
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} |
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attributes = lstAttribute; |
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} |
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// *****************************************************************************
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// public methods
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// *****************************************************************************
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public void writeToStream(DataOutputStream out) throws IOException { |
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out.writeShort(accessFlags); |
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out.writeShort(name_index); |
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out.writeShort(descriptor_index); |
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out.writeShort(attributes.size()); |
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for (StructGeneralAttribute attr : attributes) { |
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if (StructGeneralAttribute.ATTRIBUTE_CODE.equals(attr.getName())) { |
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out.writeShort(attr.getAttribute_name_index()); |
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if (lazy && !expanded) { |
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out.writeInt(10 + code_content.length); |
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out.writeShort(maxStack); |
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out.writeShort(localVariables); |
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out.writeInt(code_length); |
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out.write(code_content); |
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} |
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else { |
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ByteArrayOutputStream codeout = new ByteArrayOutputStream(); |
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seq.writeCodeToStream(new DataOutputStream(codeout)); |
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ByteArrayOutputStream excout = new ByteArrayOutputStream(); |
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seq.writeExceptionsToStream(new DataOutputStream(excout)); |
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out.writeInt(10 + codeout.size() + excout.size()); |
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out.writeShort(maxStack); |
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out.writeShort(localVariables); |
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out.writeInt(codeout.size()); |
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codeout.writeTo(out); |
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excout.writeTo(out); |
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} |
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// no attributes
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out.writeShort(0); |
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} |
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else { |
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attr.writeToStream(out); |
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} |
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} |
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in.discard(exc_length * 8); |
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codeFullLength = codeLength + exc_length * 8 + 2; |
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} |
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private static void readAttribute(DataInputFullStream in, |
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ConstantPool pool, |
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VBStyleCollection<StructGeneralAttribute, String> lstAttribute, |
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int attr_nameindex, |
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String attrname) throws IOException { |
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LazyLoader.skipAttributes(in); |
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StructGeneralAttribute attribute = StructGeneralAttribute.getMatchingAttributeInstance(attr_nameindex, attrname); |
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if (attribute != null) { |
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attrname = attribute.getName(); |
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byte[] arr = new byte[in.readInt()]; |
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in.readFull(arr); |
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attribute.setInfo(arr); |
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attribute.initContent(pool); |
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if (StructGeneralAttribute.ATTRIBUTE_LOCAL_VARIABLE_TABLE.equals(attrname) && |
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lstAttribute.containsKey(attrname)) { |
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// merge all variable tables
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StructLocalVariableTableAttribute oldattr = (StructLocalVariableTableAttribute)lstAttribute.getWithKey(attrname); |
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oldattr.addLocalVariableTable((StructLocalVariableTableAttribute)attribute); |
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} |
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else { |
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lstAttribute.addWithKey(attribute, attribute.getName()); |
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} |
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} |
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else { |
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in.skip(in.readInt()); |
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} |
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return null; |
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} |
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private void initStrings(ConstantPool pool, int class_index) { |
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String[] values = pool.getClassElement(ConstantPool.METHOD, class_index, name_index, descriptor_index); |
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name = values[0]; |
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descriptor = values[1]; |
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return super.readAttribute(in, pool, name); |
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} |
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public void expandData() throws IOException { |
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if (containsCode && lazy && !expanded) { |
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byte[] codearr = classStruct.getLoader().loadBytecode(this, code_fulllength); |
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seq = parseBytecode(new DataInputFullStream(new ByteArrayInputStream(codearr)), code_length, classStruct.getPool()); |
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if (containsCode && !expanded) { |
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byte[] code = classStruct.getLoader().loadBytecode(this, codeFullLength); |
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seq = parseBytecode(new DataInputFullStream(new ByteArrayInputStream(code)), codeLength, classStruct.getPool()); |
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expanded = true; |
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} |
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} |
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public void releaseResources() throws IOException { |
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if (containsCode && lazy && expanded) { |
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if (containsCode && expanded) { |
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seq = null; |
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expanded = false; |
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} |
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} |
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// *****************************************************************************
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// private methods
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// *****************************************************************************
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private InstructionSequence parseBytecode(DataInputFullStream in, int length, ConstantPool pool) throws IOException { |
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VBStyleCollection<Instruction, Integer> collinstr = new VBStyleCollection<Instruction, Integer>(); |
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VBStyleCollection<Instruction, Integer> instructions = new VBStyleCollection<Instruction, Integer>(); |
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int bytecode_version = classStruct.getBytecodeVersion(); |
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@ -370,7 +209,7 @@ public class StructMethod implements CodeConstants { |
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case opc_invokedynamic: |
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if (classStruct.isVersionGE_1_7()) { // instruction unused in Java 6 and before
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operands.add(new Integer(in.readUnsignedShort())); |
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in.skip(2); |
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in.discard(2); |
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group = GROUP_INVOCATION; |
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i += 4; |
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} |
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@ -420,7 +259,7 @@ public class StructMethod implements CodeConstants { |
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case opc_invokeinterface: |
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operands.add(new Integer(in.readUnsignedShort())); |
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operands.add(new Integer(in.readUnsignedByte())); |
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in.skip(1); |
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in.discard(1); |
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group = GROUP_INVOCATION; |
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i += 4; |
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break; |
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@ -430,7 +269,7 @@ public class StructMethod implements CodeConstants { |
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i += 3; |
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break; |
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case opc_tableswitch: |
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in.skip((4 - (i + 1) % 4) % 4); |
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in.discard((4 - (i + 1) % 4) % 4); |
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i += ((4 - (i + 1) % 4) % 4); // padding
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operands.add(new Integer(in.readInt())); |
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i += 4; |
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@ -449,7 +288,7 @@ public class StructMethod implements CodeConstants { |
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break; |
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case opc_lookupswitch: |
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in.skip((4 - (i + 1) % 4) % 4); |
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in.discard((4 - (i + 1) % 4) % 4); |
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i += ((4 - (i + 1) % 4) % 4); // padding
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operands.add(new Integer(in.readInt())); |
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i += 4; |
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@ -483,7 +322,7 @@ public class StructMethod implements CodeConstants { |
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Instruction instr = ConstantsUtil.getInstructionInstance(opcode, wide, group, bytecode_version, ops); |
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collinstr.addWithKey(instr, new Integer(offset)); |
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instructions.addWithKey(instr, new Integer(offset)); |
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i++; |
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} |
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@ -507,7 +346,7 @@ public class StructMethod implements CodeConstants { |
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lstHandlers.add(handler); |
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} |
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InstructionSequence seq = new FullInstructionSequence(collinstr, new ExceptionTable(lstHandlers)); |
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InstructionSequence seq = new FullInstructionSequence(instructions, new ExceptionTable(lstHandlers)); |
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// initialize instructions
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int i = seq.length() - 1; |
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@ -524,41 +363,27 @@ public class StructMethod implements CodeConstants { |
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return seq; |
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} |
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// *****************************************************************************
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// getter and setter methods
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// *****************************************************************************
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public StructClass getClassStruct() { |
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return classStruct; |
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} |
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public InstructionSequence getInstructionSequence() { |
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return seq; |
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public String getName() { |
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return name; |
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} |
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public String getDescriptor() { |
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return descriptor; |
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} |
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public String getName() { |
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return name; |
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} |
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public int getAccessFlags() { |
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return accessFlags; |
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public boolean containsCode() { |
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return containsCode; |
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} |
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public int getLocalVariables() { |
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return localVariables; |
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} |
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public VBStyleCollection<StructGeneralAttribute, String> getAttributes() { |
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return attributes; |
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} |
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public StructClass getClassStruct() { |
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return classStruct; |
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} |
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public boolean containsCode() { |
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return containsCode; |
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public InstructionSequence getInstructionSequence() { |
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return seq; |
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} |
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} |
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Roman Shevchenko
10 years ago