forked from JavaTX/JavaCompilerCore
generate bytecode
This commit is contained in:
Fayez Abu Alia
parent
995af3004a
commit
4c213eb3cf
@ -9,7 +9,6 @@ import org.objectweb.asm.ClassWriter;
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import org.objectweb.asm.FieldVisitor;
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import org.objectweb.asm.MethodVisitor;
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import org.objectweb.asm.Opcodes;
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import org.objectweb.asm.Type;
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import de.dhbwstuttgart.parser.SyntaxTreeGenerator.AssignToLocal;
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import de.dhbwstuttgart.syntaxtree.*;
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@ -54,13 +53,17 @@ public class BytecodeGen implements ASTVisitor {
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// String methDesc;
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String type;
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String className;
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// stores parameter, local vars and the next index on the local variable table, which use for aload_i, astore_i,...
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HashMap<String, Integer> paramsAndLocals = new HashMap<>();
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HashMap<String, Integer> paramsAndLocals;// = new HashMap<>();
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byte[] bytecode;
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HashMap<String,byte[]> classFiles;
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public BytecodeGen(HashMap<String,byte[]> classFiles) {
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this.classFiles = classFiles;
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paramsAndLocals = new HashMap<>();
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}
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@Override
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@ -83,11 +86,15 @@ public class BytecodeGen implements ASTVisitor {
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}
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@Override
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public void visit(ClassOrInterface classOrInterface) {
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className = classOrInterface.getClassName().toString();
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// access flages??
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cw.visit(Opcodes.V1_8, classOrInterface.getModifiers(), classOrInterface.getClassName().toString()
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cw.visit(Opcodes.V1_8, classOrInterface.getModifiers()+Opcodes.ACC_SUPER, classOrInterface.getClassName().toString()
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, null, classOrInterface.getSuperClass().toString(), null);
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// for each field in the class
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for(Field f : classOrInterface.getFieldDecl()) {
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System.out.println("get Fields");
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System.out.println(f.getName());
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f.accept(this);
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}
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@ -103,67 +110,28 @@ public class BytecodeGen implements ASTVisitor {
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@Override
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public void visit(Constructor field) {
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String methDesc = getConsDesc(field);
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MethodVisitor mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "<init>", methDesc, null, null);
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Descriptor desc = new Descriptor(field);
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MethodVisitor mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "<init>", desc.getDesc(), null, null);
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mv.visitCode();
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BytecodeGenMethod gen = new BytecodeGenMethod(field, mv,paramsAndLocals,true);
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System.out.println("-----Constructor-----");
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BytecodeGenMethod gen = new BytecodeGenMethod(className,field, mv,paramsAndLocals,desc.getDesc(),cw);
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mv.visitInsn(Opcodes.RETURN);
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mv.visitMaxs(0, 0);
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mv.visitEnd();
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}
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private String getConsDesc(Constructor field) {
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String methDesc;
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methDesc = "(";
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field.getParameterList().accept(this);
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Iterator<FormalParameter> itr = field.getParameterList().iterator();
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while(itr.hasNext()) {
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FormalParameter fp = itr.next();
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methDesc = methDesc + "L"+fp.getType().toString() + ";";
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}
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methDesc = methDesc + ")V";
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return methDesc;
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}
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@Override
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public void visit(Method method) {
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// ParameterList pl = method.getParameterList();
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String methDesc = getMethDesc(method);
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// methDesc = "(";
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// method.getParameterList().accept(this);
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// methDesc = methDesc + ")" + method.getReturnType().toString();
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// create method descriptor (p1,p2,...)RT
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// String methDesc = "(";
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// Iterator<FormalParameter> itr = pl.iterator();
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// while(itr.hasNext()) {
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// FormalParameter fp = itr.next();
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//// fp.getType().accept(this);
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// methDesc = methDesc + "L"+fp.getType().toString() + ";";
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// i++;
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// }
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// methDesc = methDesc + ")" + method.getReturnType().toString();
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MethodVisitor mv = cw.visitMethod(Opcodes.ACC_PUBLIC, method.getName(), methDesc, null, null);
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method.getParameterList().accept(this);
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Descriptor methDesc = new Descriptor(method);
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System.out.println("-----Method-----");
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MethodVisitor mv = cw.visitMethod(Opcodes.ACC_PUBLIC, method.getName(), methDesc.getDesc(), null, null);
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mv.visitCode();
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BytecodeGenMethod gen = new BytecodeGenMethod(method, mv,paramsAndLocals,false);
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}
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private String getMethDesc(Method method) {
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String methDesc;
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methDesc = "(";
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method.getParameterList().accept(this);
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Iterator<FormalParameter> itr = method.getParameterList().iterator();
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while(itr.hasNext()) {
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FormalParameter fp = itr.next();
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methDesc = methDesc + "L"+fp.getType().toString() + ";";
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}
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methDesc = methDesc + ")" + method.getReturnType().toString();
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return methDesc;
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BytecodeGenMethod gen = new BytecodeGenMethod(className,method, mv,paramsAndLocals,methDesc.getDesc(),cw);
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mv.visitMaxs(0, 0);
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mv.visitEnd();
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}
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@Override
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@ -215,13 +183,17 @@ public class BytecodeGen implements ASTVisitor {
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// ??
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@Override
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public void visit(FieldVar fieldVar) {
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System.out.println("in fieldvar");
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// cw.newField(fieldVar.receiver.toString(), fieldVar.fieldVarName.toString(), fieldVar.getType().toString());
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FieldVisitor fv = cw.visitField(Opcodes.ACC_PRIVATE, fieldVar.fieldVarName, "L"+fieldVar.getType()+";", null, null);
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fv.visitEnd();
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}
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// access flages?? modifiers
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@Override
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public void visit(Field field) {
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FieldVisitor fv = cw.visitField(Opcodes.ACC_PRIVATE, field.getName(), "L"+field.getType()+";", null, null);
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System.out.println("in field");
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FieldVisitor fv = cw.visitField(Opcodes.ACC_PRIVATE, field.getName(), "L"+field.getType().toString().replace(".", "/")+";", null, null);
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fv.visitEnd();
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}
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@ -1,9 +1,18 @@
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package de.dhbwstuttgart.bytecode;
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import java.io.PrintStream;
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import java.lang.invoke.CallSite;
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import java.lang.invoke.MethodHandle;
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import java.lang.invoke.MethodHandles;
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import java.lang.invoke.MethodType;
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import java.security.GeneralSecurityException;
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import java.util.HashMap;
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import org.objectweb.asm.ClassWriter;
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import org.objectweb.asm.Handle;
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import org.objectweb.asm.MethodVisitor;
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import org.objectweb.asm.Opcodes;
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import org.objectweb.asm.Type;
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import de.dhbwstuttgart.parser.SyntaxTreeGenerator.AssignToLocal;
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import de.dhbwstuttgart.syntaxtree.Method;
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@ -16,6 +25,7 @@ import de.dhbwstuttgart.syntaxtree.statement.Block;
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import de.dhbwstuttgart.syntaxtree.statement.CastExpr;
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import de.dhbwstuttgart.syntaxtree.statement.DoStmt;
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import de.dhbwstuttgart.syntaxtree.statement.EmptyStmt;
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import de.dhbwstuttgart.syntaxtree.statement.Expression;
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import de.dhbwstuttgart.syntaxtree.statement.FieldVar;
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import de.dhbwstuttgart.syntaxtree.statement.ForStmt;
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import de.dhbwstuttgart.syntaxtree.statement.IfStmt;
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@ -38,31 +48,63 @@ import de.dhbwstuttgart.syntaxtree.statement.UnaryPlus;
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import de.dhbwstuttgart.syntaxtree.statement.WhileStmt;
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import de.dhbwstuttgart.syntaxtree.statement.literal.Literal;
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import de.dhbwstuttgart.syntaxtree.statement.literal.Null;
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import de.dhbwstuttgart.syntaxtree.type.RefTypeOrTPHOrWildcardOrGeneric;
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public class BytecodeGenMethod implements StatementVisitor{
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private Method m;
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private MethodVisitor mv;
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private HashMap<String, Integer> paramsAndLocals = new HashMap<>();
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private String desc;
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private String className;
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private int lamCounter;
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private ClassWriter cw;
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public BytecodeGenMethod(Method m, MethodVisitor mv, HashMap<String, Integer> paramsAndLocals,
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boolean isConstructor) {
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if(isConstructor) {
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//for tests **
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private String fieldName;
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private String fieldDesc;
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private Expression rightSideTemp;
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private String where;
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// mv.visitVarInsn(Opcodes.ALOAD, 0);
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// mv.visitMethodInsn(Opcodes.INVOKESPECIAL, "java/lang/Object", "<init>", "()V");
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}
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public BytecodeGenMethod(String className, Method m, MethodVisitor mv, HashMap<String, Integer> paramsAndLocals,
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String desc, ClassWriter cw) {
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this.where = "NORMAL METHOD";
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this.className = className;
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this.m = m;
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this.mv = mv;
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this.paramsAndLocals = paramsAndLocals;
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this.desc = desc;
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this.cw = cw;
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this.lamCounter = -1;
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this.m.block.accept(this);
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}
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public BytecodeGenMethod(LambdaExpression lambdaExpression, MethodVisitor mv,
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HashMap<String, Integer> paramsAndLocals, String desc) {
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System.out.println("++++++IN LAMBDA -------");
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this.where = "&&&&&&&& LAMBDA METHOD";
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this.mv = mv;
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this.paramsAndLocals = paramsAndLocals;
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this.desc = desc;
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this.lamCounter = -1;
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lambdaExpression.methodBody.accept(this);
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}
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@Override
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public void visit(Block block) {
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for(Statement stmt : block.getStatements()) {
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System.out.println(where);
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System.out.println("Stmt : " + stmt.toString());
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stmt.accept(this);
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System.out.println("--------------------------\n");
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}
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}
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@ -70,39 +112,73 @@ public class BytecodeGenMethod implements StatementVisitor{
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public void visit(SuperCall superCall) {
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superCall.receiver.accept(this);
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superCall.arglist.accept(this);
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mv.visitMethodInsn(Opcodes.INVOKESPECIAL, "java/lang/Object", superCall.name, "()V");
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// mv.visitMethodInsn(Opcodes.INVOKESPECIAL, "java/lang/Object", superCall.name, desc,false);
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mv.visitMethodInsn(Opcodes.INVOKESPECIAL, Type.getInternalName(Object.class), superCall.name, desc,false);
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}
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// ??
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@Override
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public void visit(LocalVar localVar) {
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System.out.println("in Local Var");
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}
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// ??
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@Override
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public void visit(LocalVarDecl localVarDecl) {
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// TODO Auto-generated method stub
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Integer i;
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// Integer i;
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paramsAndLocals.put(localVarDecl.getName(), paramsAndLocals.size()+1);
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System.out.println("In localVarDecl");
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}
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// int c = 5;???
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@Override
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public void visit(Assign assign) {
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System.out.println("Assign : \nright = "+assign.rightSide + "\nLeft = " + assign.lefSide);
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if(assign.lefSide.getClass().equals(AssignToField.class)) {
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// load_0, ldc or .. then putfield
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this.rightSideTemp = assign.rightSide;
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assign.lefSide.accept(this);
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}else {
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assign.rightSide.accept(this);
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// int index = paramsAndLocals.get(assign.lefSide.getName());
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// mv.visitVarInsn(Opcodes.ASTORE, index);
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assign.lefSide.accept(this);
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}
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}
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@Override
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public void visit(Binary binary) {
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// TODO Auto-generated method stub
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System.out.println("++ In Binary: ");
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}
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@Override
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public void visit(LambdaExpression lambdaExpression) {
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// TODO Auto-generated method stub
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System.out.println("\n++ In Lambda: ");
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this.lamCounter++;
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//Call site, which, when invoked, returns an instance of the functional interface to which
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//the lambda is being converted
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MethodType mt = MethodType.methodType(CallSite.class, MethodHandles.Lookup.class, String.class,
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MethodType.class, MethodType.class, MethodHandle.class, MethodType.class);
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Handle bootstrap = new Handle(Opcodes.H_INVOKESTATIC, "java/lang/invoke/LambdaMetafactory",
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"metafactory", mt.toMethodDescriptorString(), false);
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String methodName = "lambda$new$" + this.lamCounter;
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// Type erasure
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Type arg1 = Type.getMethodType("()V");
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// real Type
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Type arg3 = Type.getMethodType("()V");
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Handle arg2 = new Handle(Opcodes.H_INVOKESTATIC, this.className, methodName,
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arg3.toString(),false);
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mv.visitInvokeDynamicInsn("run", "()Ljava/lang/Runnable;", bootstrap,
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arg1, arg2,arg3);
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MethodVisitor mvLambdaBody = cw.visitMethod(Opcodes.ACC_PRIVATE+ Opcodes.ACC_STATIC + Opcodes.ACC_SYNTHETIC,
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methodName, arg3.toString(), null, null);
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// new BytecodeGenLambda(lambdaExpression, mvLambdaBody);
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new BytecodeGenMethod(lambdaExpression, mvLambdaBody, new HashMap<>(), arg3.toString());
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mvLambdaBody.visitMaxs(0, 0);
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mvLambdaBody.visitEnd();
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}
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@Override
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@ -119,8 +195,19 @@ public class BytecodeGenMethod implements StatementVisitor{
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@Override
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public void visit(FieldVar fieldVar) {
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// TODO Auto-generated method stub
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System.out.println("in fieldVar " + fieldVar.fieldVarName + " ** receiver: "+fieldVar.receiver);
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fieldName = fieldVar.fieldVarName;
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fieldDesc = fieldVar.getType().toString();
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fieldVar.receiver.accept(this);
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// test (if)
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if(!fieldVar.receiver.getClass().equals(StaticClassName.class)) {
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mv.visitFieldInsn(Opcodes.GETFIELD,fieldVar.getType().toString(),fieldName ,fieldDesc);
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}
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// mv.visitFieldInsn(Opcodes.GETSTATIC, fieldVar.receiver.getType().toString().replace(".", "/"),
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// fieldVar.fieldVarName, fieldVar.getType().toString());
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}
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@Override
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@ -131,8 +218,7 @@ public class BytecodeGenMethod implements StatementVisitor{
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@Override
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public void visit(IfStmt ifStmt) {
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// TODO Auto-generated method stub
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System.out.println("++ IF-Statment: ");
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}
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@Override
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@ -143,13 +229,38 @@ public class BytecodeGenMethod implements StatementVisitor{
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@Override
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public void visit(MethodCall methodCall) {
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System.out.println(" In Methodcall: (" +methodCall.name+")" );
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System.out.println(" Method-Receiver: "+methodCall.receiver.expr);
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methodCall.receiver.accept(this);
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methodCall.arglist.accept(this);
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Descriptor mDesc = new Descriptor(methodCall.arglist, methodCall.getType());
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mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, methodCall.receiver.expr.getType().toString(),
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methodCall.name, mDesc.getDesc(), false);
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// test
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if(!methodCall.getType().toString().equals("V")) {
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mv.visitInsn(Opcodes.POP);
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}
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}
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@Override
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public void visit(NewClass methodCall) {
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// TODO Auto-generated method stub
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System.out.println("In NewClass: ");
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System.out.println("name: " + methodCall.name + " *** " + "Receiver: " + methodCall.receiver);
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mv.visitTypeInsn(Opcodes.NEW, methodCall.name.replace(".", "/"));
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mv.visitInsn(Opcodes.DUP);
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// creates Descriptor
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methodCall.arglist.accept(this);
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String d = "(";
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for(Expression e : methodCall.arglist.getArguments()) {
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d = d + "L"+e.getType().toString().replace(".", "/") + ";";
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}
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d += ")V";
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mv.visitMethodInsn(Opcodes.INVOKESPECIAL, methodCall.name.replace(".", "/"), "<init>", d, false);
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}
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@Override
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@ -160,13 +271,14 @@ public class BytecodeGenMethod implements StatementVisitor{
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@Override
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public void visit(Receiver receiver) {
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System.out.println(" in Receiver");
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System.out.println(" expr : " + receiver.expr);
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receiver.expr.accept(this);
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}
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@Override
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public void visit(Return aReturn) {
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// TODO Auto-generated method stub
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mv.visitInsn(Opcodes.ARETURN);
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}
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@Override
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@ -176,25 +288,27 @@ public class BytecodeGenMethod implements StatementVisitor{
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@Override
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public void visit(StaticClassName staticClassName) {
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// TODO Auto-generated method stub
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System.out.println("In StaticClassName: ");
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// mv.visitMethodInsn(Opcodes.INVOKESTATIC, staticClassName.getType().toString().replace(".", "/"),
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// staticClassName.toString(), staticClassName.getType().toString(), false);
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mv.visitFieldInsn(Opcodes.GETSTATIC, staticClassName.getType().toString().replace(".", "/"),
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fieldName, fieldDesc);
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}
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@Override
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public void visit(Super aSuper) {
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// TODO Auto-generated method stub
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System.out.println(">> In Super: ");
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}
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@Override
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public void visit(This aThis) {
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System.out.println("-> IN This");
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mv.visitVarInsn(Opcodes.ALOAD, 0);
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}
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@Override
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public void visit(UnaryPlus unaryPlus) {
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// TODO Auto-generated method stub
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System.out.println("++ In UnaryPlus: ");
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}
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@Override
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@ -211,32 +325,36 @@ public class BytecodeGenMethod implements StatementVisitor{
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@Override
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public void visit(Null aNull) {
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// TODO Auto-generated method stub
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mv.visitInsn(Opcodes.ACONST_NULL);
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}
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||||
@Override
|
||||
public void visit(Literal literal) {
|
||||
// TODO Auto-generated method stub
|
||||
|
||||
// value?
|
||||
mv.visitLdcInsn(literal.getType().toString());
|
||||
}
|
||||
|
||||
@Override
|
||||
public void visit(ArgumentList argumentList) {
|
||||
// TODO Auto-generated method stub
|
||||
|
||||
for(Expression al : argumentList.getArguments()) {
|
||||
al.accept(this);
|
||||
}
|
||||
}
|
||||
|
||||
@Override
|
||||
public void visit(AssignToField assignLeftSide) {
|
||||
// TODO Auto-generated method stub
|
||||
|
||||
// Loads the an object reference from the local variable
|
||||
// array slot onto the top of the operand stack.
|
||||
assignLeftSide.field.receiver.accept(this);
|
||||
this.rightSideTemp.accept(this);
|
||||
mv.visitFieldInsn(Opcodes.PUTFIELD, assignLeftSide.field.receiver.getType().toString(),
|
||||
assignLeftSide.field.fieldVarName, assignLeftSide.field.getType().toString());
|
||||
}
|
||||
|
||||
@Override
|
||||
public void visit(AssignToLocal assignLeftSide) {
|
||||
// TODO Auto-generated method stub
|
||||
|
||||
paramsAndLocals.put(assignLeftSide.localVar.name, paramsAndLocals.size()+1);
|
||||
mv.visitVarInsn(Opcodes.ASTORE, paramsAndLocals.size());
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
54
src/de/dhbwstuttgart/bytecode/Descriptor.java
Normal file
54
src/de/dhbwstuttgart/bytecode/Descriptor.java
Normal file
@ -0,0 +1,54 @@
|
||||
package de.dhbwstuttgart.bytecode;
|
||||
|
||||
import java.awt.List;
|
||||
import java.util.Iterator;
|
||||
|
||||
import de.dhbwstuttgart.syntaxtree.Constructor;
|
||||
import de.dhbwstuttgart.syntaxtree.FormalParameter;
|
||||
import de.dhbwstuttgart.syntaxtree.Method;
|
||||
import de.dhbwstuttgart.syntaxtree.statement.ArgumentList;
|
||||
import de.dhbwstuttgart.syntaxtree.statement.Expression;
|
||||
import de.dhbwstuttgart.syntaxtree.type.RefTypeOrTPHOrWildcardOrGeneric;
|
||||
|
||||
public class Descriptor {
|
||||
String desc;
|
||||
|
||||
public Descriptor(Method method) {
|
||||
desc = "(";
|
||||
Iterator<FormalParameter> itr = method.getParameterList().iterator();
|
||||
while(itr.hasNext()) {
|
||||
FormalParameter fp = itr.next();
|
||||
desc = desc + "L"+fp.getType().toString().replace(".", "/") + ";";
|
||||
}
|
||||
if(method.getReturnType().toString().equals("void")){
|
||||
desc = desc + ")V";
|
||||
}else {
|
||||
desc = desc + ")" + "L"+method.getReturnType().toString().replace(".", "/")+";";
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
public Descriptor(Constructor constructor) {
|
||||
desc = "(";
|
||||
Iterator<FormalParameter> itr = constructor.getParameterList().iterator();
|
||||
while(itr.hasNext()) {
|
||||
FormalParameter fp = itr.next();
|
||||
desc = desc + "L"+fp.getType().toString().replace(".", "/") + ";";
|
||||
}
|
||||
desc = desc + ")V";
|
||||
}
|
||||
|
||||
public Descriptor(ArgumentList argList, RefTypeOrTPHOrWildcardOrGeneric returnType) {
|
||||
desc = "(";
|
||||
for(Expression e : argList.getArguments()) {
|
||||
desc = desc + "L"+e.getType().toString().replace(".", "/") + ";";
|
||||
}
|
||||
desc = desc + ")"+returnType.toString();
|
||||
|
||||
}
|
||||
|
||||
public String getDesc() {
|
||||
return this.desc;
|
||||
}
|
||||
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user