Examples with MethodVisitor org.mvel2.asm.MethodVisitor used on opensource projects

Example 1 with MethodVisitor

use of org.mvel2.asm.MethodVisitor in project mvel by mikebrock.

the class ASMAccessorOptimizer method _initJIT.

/**
   * Does all the boilerplate for initiating the JIT.
   */
private void _initJIT() {
    if (isAdvancedDebugging()) {
        buildLog = new StringAppender();
    }
    cw = new ClassWriter(ClassWriter.COMPUTE_MAXS + ClassWriter.COMPUTE_FRAMES);
    synchronized (Runtime.getRuntime()) {
        cw.visit(OPCODES_VERSION, Opcodes.ACC_PUBLIC + Opcodes.ACC_SUPER, className = "ASMAccessorImpl_" + valueOf(cw.hashCode()).replaceAll("\\-", "_") + (System.currentTimeMillis() / 10) + ((int) Math.random() * 100), null, "java/lang/Object", new String[] { NAMESPACE + "compiler/Accessor" });
    }
    MethodVisitor m = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
    m.visitCode();
    m.visitVarInsn(Opcodes.ALOAD, 0);
    m.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V");
    m.visitInsn(RETURN);
    m.visitMaxs(1, 1);
    m.visitEnd();
    (mv = cw.visitMethod(ACC_PUBLIC, "getValue", "(Ljava/lang/Object;Ljava/lang/Object;L" + NAMESPACE + "integration/VariableResolverFactory;)Ljava/lang/Object;", null, null)).visitCode();
}

Example 2 with MethodVisitor

use of org.mvel2.asm.MethodVisitor in project mvel by mikebrock.

the class ASMAccessorOptimizer method buildInputs.

private void buildInputs() {
    if (compiledInputs.size() == 0)
        return;
    assert debug("\n{SETTING UP MEMBERS...}\n");
    StringAppender constSig = new StringAppender("(");
    int size = compiledInputs.size();
    for (int i = 0; i < size; i++) {
        assert debug("ACC_PRIVATE p" + i);
        cw.visitField(ACC_PRIVATE, "p" + i, "L" + NAMESPACE + "compiler/ExecutableStatement;", null, null).visitEnd();
        constSig.append("L" + NAMESPACE + "compiler/ExecutableStatement;");
    }
    constSig.append(")V");
    assert debug("\n{CREATING INJECTION CONSTRUCTOR}\n");
    MethodVisitor cv = cw.visitMethod(ACC_PUBLIC, "<init>", constSig.toString(), null, null);
    cv.visitCode();
    assert debug("ALOAD 0");
    cv.visitVarInsn(ALOAD, 0);
    assert debug("INVOKESPECIAL java/lang/Object.<init>");
    cv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V");
    for (int i = 0; i < size; i++) {
        assert debug("ALOAD 0");
        cv.visitVarInsn(ALOAD, 0);
        assert debug("ALOAD " + (i + 1));
        cv.visitVarInsn(ALOAD, i + 1);
        assert debug("PUTFIELD p" + i);
        cv.visitFieldInsn(PUTFIELD, className, "p" + i, "L" + NAMESPACE + "compiler/ExecutableStatement;");
    }
    assert debug("RETURN");
    cv.visitInsn(RETURN);
    cv.visitMaxs(0, 0);
    cv.visitEnd();
    assert debug("}");
}

Example 3 with MethodVisitor

use of org.mvel2.asm.MethodVisitor in project mvel by mikebrock.

the class ASMAccessorOptimizer method _initJIT2.

private void _initJIT2() {
    if (isAdvancedDebugging()) {
        buildLog = new StringAppender();
    }
    cw = new ClassWriter(ClassWriter.COMPUTE_MAXS + ClassWriter.COMPUTE_FRAMES);
    synchronized (Runtime.getRuntime()) {
        cw.visit(OPCODES_VERSION, Opcodes.ACC_PUBLIC + Opcodes.ACC_SUPER, className = "ASMAccessorImpl_" + valueOf(cw.hashCode()).replaceAll("\\-", "_") + (System.currentTimeMillis() / 10) + ((int) Math.random() * 100), null, "java/lang/Object", new String[] { NAMESPACE + "compiler/Accessor" });
    }
    MethodVisitor m = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
    m.visitCode();
    m.visitVarInsn(Opcodes.ALOAD, 0);
    m.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V");
    m.visitInsn(RETURN);
    m.visitMaxs(1, 1);
    m.visitEnd();
    (mv = cw.visitMethod(ACC_PUBLIC, "setValue", "(Ljava/lang/Object;Ljava/lang/Object;L" + NAMESPACE + "integration/VariableResolverFactory;Ljava/lang/Object;)Ljava/lang/Object;", null, null)).visitCode();
}

Example 4 with MethodVisitor

use of org.mvel2.asm.MethodVisitor in project mvel by mikebrock.

the class TraceClassVisitor method visitMethod.

public MethodVisitor visitMethod(final int access, final String name, final String desc, final String signature, final String[] exceptions) {
    buf.setLength(0);
    buf.append('\n');
    if ((access & Opcodes.ACC_DEPRECATED) != 0) {
        buf.append(tab).append("// DEPRECATED\n");
    }
    buf.append(tab).append("// access flags ").append(access).append('\n');
    if (signature != null) {
        buf.append(tab);
        appendDescriptor(METHOD_SIGNATURE, signature);
        TraceSignatureVisitor v = new TraceSignatureVisitor(0);
        SignatureReader r = new SignatureReader(signature);
        r.accept(v);
        String genericDecl = v.getDeclaration();
        String genericReturn = v.getReturnType();
        String genericExceptions = v.getExceptions();
        buf.append(tab).append("// declaration: ").append(genericReturn).append(' ').append(name).append(genericDecl);
        if (genericExceptions != null) {
            buf.append(" throws ").append(genericExceptions);
        }
        buf.append('\n');
    }
    buf.append(tab);
    appendAccess(access);
    if ((access & Opcodes.ACC_NATIVE) != 0) {
        buf.append("native ");
    }
    if ((access & Opcodes.ACC_VARARGS) != 0) {
        buf.append("varargs ");
    }
    if ((access & Opcodes.ACC_BRIDGE) != 0) {
        buf.append("bridge ");
    }
    buf.append(name);
    appendDescriptor(METHOD_DESCRIPTOR, desc);
    if (exceptions != null && exceptions.length > 0) {
        buf.append(" throws ");
        for (int i = 0; i < exceptions.length; ++i) {
            appendDescriptor(INTERNAL_NAME, exceptions[i]);
            buf.append(' ');
        }
    }
    buf.append('\n');
    text.add(buf.toString());
    TraceMethodVisitor tcv = createTraceMethodVisitor();
    text.add(tcv.getText());
    if (cv != null) {
        tcv.mv = cv.visitMethod(access, name, desc, signature, exceptions);
    }
    return tcv;
}