Java GeneratorAdapter.push方法代碼示例

import org.objectweb.asm.commons.GeneratorAdapter; //導入方法依賴的package包/類
private static void createClassArray(GeneratorAdapter mv, List<Type> args) {
        // create an array of objects capable of containing all the parameters and optionally the "this"

        createLocals(mv, args);
        // we need to maintain the stack index when loading parameters from, as for long and double
        // values, it uses 2 stack elements, all others use only 1 stack element.
        int stackIndex = 0;
        for (int arrayIndex = 0; arrayIndex < args.size(); arrayIndex++) {
            Type arg = args.get(arrayIndex);
            // duplicate the array of objects reference, it will be used to store the value in.
            mv.dup();
            // index in the array of objects to store the boxed parameter.
            mv.push(arrayIndex);
            // Pushes the appropriate local variable on the stack
            redirectLocal(mv, arg);
//			 mv.visitLdcInsn(Type.getType(arg.getDescriptor()));
            // potentially box up intrinsic types.
//			 mv.box(arg);
            mv.arrayStore(Type.getType(Class.class));
            // stack index must progress according to the parameter type we just processed.
//			 stackIndex += arg.getSize();
        }
    }
 

import org.objectweb.asm.commons.GeneratorAdapter; //導入方法依賴的package包/類
public void visitEnd() {
	if (! doneAddField) {
		doneAddField = true;
		
		super.visitField(Opcodes.ACC_PUBLIC | Opcodes.ACC_STATIC, CLASS_FIELD, Type.getDescriptor(Agent.class), null, null);
	}
	
	if (! doneAddMethod) {
		doneAddMethod = true;

		GeneratorAdapter mg = new GeneratorAdapter(Opcodes.ACC_PUBLIC | Opcodes.ACC_STATIC, new Method(LOG_CLASS_METHOD, LOG_CLASS_SIGNATURE), LOG_CLASS_SIGNATURE, new Type[] {}, this);

		Label target = mg.newLabel();
		mg.getStatic(JAVA_LANG_SYSTEM_TYPE, CLASS_FIELD, JAVA_LANG_CLASS_TYPE);
		mg.ifNull(target);
		mg.push(LOG_INTERNAL_TYPE);
		mg.putStatic(JAVA_LANG_SYSTEM_TYPE, CLASS_FIELD, JAVA_LANG_CLASS_TYPE);
		mg.mark(target);
		mg.getStatic(JAVA_LANG_SYSTEM_TYPE, CLASS_FIELD, JAVA_LANG_CLASS_TYPE);
		mg.returnValue();
	}
	
	super.visitEnd();
}
 

import org.objectweb.asm.commons.GeneratorAdapter; //導入方法依賴的package包/類
@SuppressWarnings("unchecked")
public void visitEnd() {
	if (!foundClinit && instrument()) {
		// didn't find <clinit> so lets make one
		try {
			GeneratorAdapter mg = new GeneratorAdapter(Opcodes.ACC_PUBLIC | Opcodes.ACC_STATIC, new Method(CLINIT_NAME, CLINIT_SIGNATURE), CLINIT_SIGNATURE, new Type[] {}, this);
			
			Label start = mg.mark();
			mg.push(className);
			mg.invokeStatic(LOG_INTERNAL_TYPE, Method.getMethod(LOG_INTERNAL_CLASS.getMethod(LOG_METHOD_NAME, String.class)));
			Label end   = mg.mark();
			mg.returnValue();
			
			mg.catchException(start, end, JAVA_LANG_THROWABLE_TYPE);
			mg.returnValue();
			
			mg.endMethod();
		} catch (NoSuchMethodException nsme) {
			System.out.println("Unable to find Agent.reportClass method");
		}
	}
	
	super.visitEnd();
}
 

import org.objectweb.asm.commons.GeneratorAdapter; //導入方法依賴的package包/類
/**
 * Given an array on the stack, it loads it with the values of the given variables stating at
 * offset.
 */
static void loadVariableArray(
         GeneratorAdapter mv,
         List<LocalVariable> variables, int offset) {
    // we need to maintain the stack index when loading parameters from, as for long and double
    // values, it uses 2 stack elements, all others use only 1 stack element.
    for (int i = offset; i < variables.size(); i++) {
        LocalVariable variable = variables.get(i);
        // duplicate the array of objects reference, it will be used to store the value in.
        mv.dup();
        // index in the array of objects to store the boxed parameter.
        mv.push(i);
        // Pushes the appropriate local variable on the stack
        mv.visitVarInsn(variable.type.getOpcode(Opcodes.ILOAD), variable.var);
        // potentially box up intrinsic types.
        mv.box(variable.type);
        // store it in the array
        mv.arrayStore(Type.getType(Object.class));
    }
}
 

import org.objectweb.asm.commons.GeneratorAdapter; //導入方法依賴的package包/類
public static void establishCallback(ClassNode cn, MethodNode mn) {
    if (!mn.desc.startsWith("()")) {
        MethodNode blank = new MethodNode();
        Method method = new Method(mn.name, mn.desc);
        GeneratorAdapter adapter = new GeneratorAdapter(mn.access, method, blank);
        adapter.visitCode();
        adapter.push(cn.name + "." + mn.name + "  " + mn.desc);
        adapter.loadArgArray();
        adapter.invokeStatic(Type.getType(CallFactory.class), new Method("testInvoke",
                "(Ljava/lang/String;[Ljava/lang/Object;)V"));
        for (AbstractInsnNode ain : mn.instructions.toArray()) {
            if (ain instanceof VarInsnNode) {
                mn.instructions.insertBefore(ain, blank.instructions);
                return;
            }
        }
    }
}
 

import org.objectweb.asm.commons.GeneratorAdapter; //導入方法依賴的package包/類
public void emit(C context, ObjExpr objx, GeneratorAdapter gen){
	if(targetClass != null && field != null)
		{
		target.emit(C.EXPRESSION, objx, gen);
		gen.visitLineNumber(line, gen.mark());
		gen.checkCast(getType(targetClass));
		gen.getField(getType(targetClass), fieldName, Type.getType(field.getType()));
		//if(context != C.STATEMENT)
		HostExpr.emitBoxReturn(objx, gen, field.getType());
		if(context == C.STATEMENT)
			{
			gen.pop();
			}
		}
	else
		{
		target.emit(C.EXPRESSION, objx, gen);
		gen.visitLineNumber(line, gen.mark());
		gen.push(fieldName);
		gen.push(requireField);
		gen.invokeStatic(REFLECTOR_TYPE, invokeNoArgInstanceMember);
		if(context == C.STATEMENT)
			gen.pop();
		}
}
 

import org.objectweb.asm.commons.GeneratorAdapter; //導入方法依賴的package包/類
protected void emitMethods(ClassVisitor cv){
	//override of invoke/doInvoke for each method
	for(ISeq s = RT.seq(methods); s != null; s = s.next())
		{
		ObjMethod method = (ObjMethod) s.first();
		method.emit(this, cv);
		}

	if(isVariadic())
		{
		GeneratorAdapter gen = new GeneratorAdapter(ACC_PUBLIC,
		                                            Method.getMethod("int getRequiredArity()"),
		                                            null,
		                                            null,
		                                            cv);
		gen.visitCode();
		gen.push(variadicMethod.reqParms.count());
		gen.returnValue();
		gen.endMethod();
		}
}
 

import org.objectweb.asm.commons.GeneratorAdapter; //導入方法依賴的package包/類
private static void prepareMethodParameters(GeneratorAdapter mv, String className, List<Type> args, Type returnType, boolean isStatic, int methodId) {
    //第一個參數：new Object[]{...};,如果方法沒有參數直接傳入new Object[0]
    if (args.size() == 0) {
        mv.visitInsn(Opcodes.ICONST_0);
        mv.visitTypeInsn(Opcodes.ANEWARRAY, "java/lang/Object");
    } else {
        createObjectArray(mv, args, isStatic);
    }

    //第二個參數：this,如果方法是static的話就直接傳入null
    if (isStatic) {
        mv.visitInsn(Opcodes.ACONST_NULL);
    } else {
        mv.visitVarInsn(Opcodes.ALOAD, 0);
    }

    //第三個參數：changeQuickRedirect
    mv.visitFieldInsn(Opcodes.GETSTATIC,
            className,
            REDIRECTFIELD_NAME,
            REDIRECTCLASSNAME);

    //第四個參數：false,標誌是否為static
    mv.visitInsn(isStatic ? Opcodes.ICONST_1 : Opcodes.ICONST_0);
    //第五個參數：
    mv.push(methodId);
    //第六個參數：參數class數組
    createClassArray(mv, args);
    //第七個參數：返回值類型class
    createReturnClass(mv, returnType);
}
 

import org.objectweb.asm.commons.GeneratorAdapter; //導入方法依賴的package包/類
void writeMissingMessageWithHash(GeneratorAdapter mv, String visitedClassName) {
    mv.newInstance(INSTANT_RELOAD_EXCEPTION_TYPE);
    mv.dup();
    mv.push("int switch could not find %d in %s");
    mv.push(3);
    mv.newArray(OBJECT_TYPE);
    mv.dup();
    mv.push(0);
    visitInt();
    mv.visitMethodInsn(
            Opcodes.INVOKESTATIC,
            "java/lang/Integer",
            "valueOf",
            "(I)Ljava/lang/Integer;", false);
    mv.arrayStore(OBJECT_TYPE);
    mv.dup();
    mv.push(2);
    mv.push(visitedClassName);
    mv.arrayStore(OBJECT_TYPE);
    mv.visitMethodInsn(
            Opcodes.INVOKESTATIC,
            "java/lang/String",
            "format",
            "(Ljava/lang/String;[Ljava/lang/Object;)Ljava/lang/String;", false);
    mv.invokeConstructor(INSTANT_RELOAD_EXCEPTION_TYPE,
            Method.getMethod("void <init> (String)"));
    mv.throwException();
}
 

import org.objectweb.asm.commons.GeneratorAdapter; //導入方法依賴的package包/類
/**
 * Pushes an array on the stack that contains the value of all the given variables.
 */
static void newVariableArray(
         GeneratorAdapter mv,
         List<LocalVariable> variables) {
    mv.push(variables.size());
    mv.newArray(Type.getType(Object.class));
    loadVariableArray(mv, variables, 0);
}
 

import org.objectweb.asm.commons.GeneratorAdapter; //導入方法依賴的package包/類
@Override
protected void doRedirect( GeneratorAdapter mv, int change) {
    mv.loadLocal(change);
    mv.push(AcesoProguardMap.instance().getMtdIndex(visitedClassName, IncrementalTool.getMtdSig(mtdName,mtdDesc)));
    ByteCodeUtils.newVariableArray(mv, ByteCodeUtils.toLocalVariables(types));

    // now invoke the generic dispatch method.
    mv.invokeInterface(IncrementalVisitor.CHANGE_TYPE, Method.getMethod("Object access$dispatch(int, Object[])"));
}
 

import org.objectweb.asm.commons.GeneratorAdapter; //導入方法依賴的package包/類
/**
 * Generates a standard error exception with message similar to:
 *
 *    String switch could not find 'equals.(Ljava/lang/Object;)Z' with hashcode 0
 *    in com/example/basic/GrandChild
 *
 * @param mv The generator adaptor used to emit the lookup switch code.
 * @param visitedClassName The abstract string trie structure.
 */
void writeMissingMessageWithHash(GeneratorAdapter mv, String visitedClassName) {
    mv.newInstance(INSTANT_RELOAD_EXCEPTION_TYPE);
    mv.dup();
    mv.push("String switch could not find '%s' with hashcode %s in %s");
    mv.push(3);
    mv.newArray(OBJECT_TYPE);
    mv.dup();
    mv.push(0);
    visitString();
    mv.arrayStore(OBJECT_TYPE);
    mv.dup();
    mv.push(1);
    visitString();
    visitHashMethod(mv);
    mv.visitMethodInsn(
            Opcodes.INVOKESTATIC,
            "java/lang/Integer",
            "valueOf",
            "(I)Ljava/lang/Integer;", false);
    mv.arrayStore(OBJECT_TYPE);
    mv.dup();
    mv.push(2);
    mv.push(visitedClassName);
    mv.arrayStore(OBJECT_TYPE);
    mv.visitMethodInsn(
            Opcodes.INVOKESTATIC,
            "java/lang/String",
            "format",
            "(Ljava/lang/String;[Ljava/lang/Object;)Ljava/lang/String;", false);
    mv.invokeConstructor(INSTANT_RELOAD_EXCEPTION_TYPE,
            Method.getMethod("void <init> (String)"));
    mv.throwException();
}
 

import org.objectweb.asm.commons.GeneratorAdapter; //導入方法依賴的package包/類
protected static void trace(GeneratorAdapter mv, String s1,
                            String s2, String s3) {
    mv.push(s1);
    mv.push(s2);
    mv.push(s3);
    mv.invokeStatic(Type.getType(PACKAGE + ".AndroidInstantRuntime"),
            Method.getMethod("void trace(String, String, String)"));
}
 

import org.objectweb.asm.commons.GeneratorAdapter; //導入方法依賴的package包/類
public void emitUnboxed(C context, ObjExpr objx, GeneratorAdapter gen){
	if(n instanceof Integer)
		gen.push(n.longValue());
	else if(n instanceof Double)
		gen.push(n.doubleValue());
	else if(n instanceof Long)
		gen.push(n.longValue());
}
 

import org.objectweb.asm.commons.GeneratorAdapter; //導入方法依賴的package包/類
private void emitShiftMask(GeneratorAdapter gen){
    if (isShiftMasked())
        {
           gen.push(shift);
           gen.visitInsn(ISHR);
           gen.push(mask);
           gen.visitInsn(IAND);
        }
}