Java InsnList.size方法代码示例

import org.objectweb.asm.tree.InsnList; //导入方法依赖的package包/类
private static void stringEncryptionTransformer(ClassNode classNode) {
    if (classNode.superName.equals("org/bukkit/plugin/java/JavaPlugin") || classNode.superName.equals("net/md_5/bungee/api/plugin/Plugin")) {
        for (MethodNode methodNode : classNode.methods) {
            InsnList nodes = methodNode.instructions;
            for (int i = 0; i < nodes.size(); i++) {
                AbstractInsnNode instruction = nodes.get(i);
                if (instruction instanceof LdcInsnNode) {
                    if (instruction.getNext() instanceof MethodInsnNode) {
                        LdcInsnNode ldc = (LdcInsnNode) instruction;
                        MethodInsnNode methodinsnnode = (MethodInsnNode) ldc.getNext();
                        if (ldc.cst instanceof String) {
                            if (methodinsnnode.name.equalsIgnoreCase("\u0972") && methodinsnnode.desc.equalsIgnoreCase("(Ljava/lang/String;)Ljava/lang/String;")) {
                                methodNode.instructions.remove(methodinsnnode);
                                ldc.cst = decryptionArray((String)ldc.cst);
                            }
                        }
                    }
                }
            }
        }
    }
}
 

import org.objectweb.asm.tree.InsnList; //导入方法依赖的package包/类
private static BitSet getEntryPoints(MethodNode asmNode, Map<AbstractInsnNode, int[]> exitPoints) {
	InsnList il = asmNode.instructions;
	BitSet entryPoints = new BitSet(il.size());

	for (int[] eps : exitPoints.values()) {
		if (eps != null) {
			for (int ep : eps) entryPoints.set(ep);
		}
	}

	for (TryCatchBlockNode n : asmNode.tryCatchBlocks) {
		entryPoints.set(il.indexOf(n.handler));
	}

	return entryPoints;
}
 

import org.objectweb.asm.tree.InsnList; //导入方法依赖的package包/类
public byte[] transformCode(byte[] b1, String className) throws IOException {
    ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS);
    ClassReader cr = new ClassReader(b1);
    ClassNode classNode = new ClassNode();
    Map<String, Boolean> methodInstructionTypeMap = new HashMap<>();
    cr.accept(classNode, 0);
    final List<MethodNode> methods = classNode.methods;
    for (MethodNode m : methods) {
        InsnList inList = m.instructions;
        boolean isMethodInvoke = false;
        for (int i = 0; i < inList.size(); i++) {
            if (inList.get(i).getType() == AbstractInsnNode.METHOD_INSN) {
                isMethodInvoke = true;
            }
        }
        methodInstructionTypeMap.put(m.name + m.desc, isMethodInvoke);
    }
    InsertMethodBodyAdapter insertMethodBodyAdapter = new InsertMethodBodyAdapter(cw, className, methodInstructionTypeMap);
    cr.accept(insertMethodBodyAdapter, ClassReader.EXPAND_FRAMES);
    return cw.toByteArray();
}
 

import org.objectweb.asm.tree.InsnList; //导入方法依赖的package包/类
public void populateClassGraph() {
  String className = Type.getObjectType(classNode.name).getClassName();
  logger.debug("Creating graph for class {}" , className);
  for (MethodNode methodNode : classNode.methods) {
    String methodName = methodNode.name;
    MethodGraph caller = new MethodGraph(className, methodName);
    InsnList instructions = methodNode.instructions;
    for (int i = 0; i < instructions.size(); i++) {
      AbstractInsnNode insnNode = instructions.get(i);
      if (insnNode.getType() == AbstractInsnNode.METHOD_INSN) {
        MethodInsnNode methodInsnNode = (MethodInsnNode)insnNode;
        String calledOwner = Type.getObjectType(methodInsnNode.owner).getClassName();
        String calledName = methodInsnNode.name;
        MethodGraph called = new MethodGraph(calledOwner, calledName);
        Call call = new Call(caller, called);
        if (!called.getOwner().equals("java.lang.Object") && !called.getName().equals("<init>")) {
          logger.trace("Adding call graph: {}", call.toString());
          GraphHolder.addCallGraph(call);
        }
      }
    }
  }
}
 

import org.objectweb.asm.tree.InsnList; //导入方法依赖的package包/类
/**
 * 格式化输出字节码
 * @param bytecode
 */
public static void viewByteCode(byte[] bytecode) {
    ClassReader cr = new ClassReader(bytecode);
    ClassNode cn = new ClassNode();
    cr.accept(cn, 0);
    final List<MethodNode> mns = cn.methods;
    Printer printer = new Textifier();
    TraceMethodVisitor mp = new TraceMethodVisitor(printer);
    for (MethodNode mn : mns) {
        InsnList inList = mn.instructions;
        System.out.println(mn.name);
        for (int i = 0; i < inList.size(); i++) {
            inList.get(i).accept(mp);
            StringWriter sw = new StringWriter();
            printer.print(new PrintWriter(sw));
            printer.getText().clear();
            System.out.print(sw.toString());
        }
    }
}
 

import org.objectweb.asm.tree.InsnList; //导入方法依赖的package包/类
public void printClassByteCode(byte code[]) {
	ClassReader cr = new ClassReader(code);
	ClassNode cn = new ClassNode();
	cr.accept(cn, 0);
	
	@SuppressWarnings("unchecked")
	List<MethodNode> methods = (List<MethodNode>)cn.methods;
       for (int i = 0; i < methods.size(); ++i) {
           MethodNode method = methods.get(i);
           InsnList instructions = method.instructions;
           if (instructions.size() <= 0)
           	continue;
           
       	System.out.println("Method: "+method.name+" ");
           for (int j = 0; j < instructions.size(); ++j) {
           	AbstractInsnNode insn = (AbstractInsnNode)instructions.get(j);
               System.out.println("\tInsn: opc="+OpcodeUtil.getOpcode(insn.getOpcode())+", type="+insn.getType());
               if (insn.getType() == AbstractInsnNode.METHOD_INSN) {
           		MethodInsnNode min = (MethodInsnNode)insn;
           		System.out.printf("\t\towner=%s, name=%s, desc=%s\n", min.owner, min.name, min.desc);
               }
           }
       }
}
 

import org.objectweb.asm.tree.InsnList; //导入方法依赖的package包/类
public static InsnList getImportantList(InsnList list) {
	if (list.size() == 0) {
		return list;
	}

	HashMap<LabelNode, LabelNode> labels = new HashMap<>();

	for (AbstractInsnNode insn = list.getFirst(); insn != null; insn = insn.getNext()) {
		if (insn instanceof LabelNode) {
			labels.put((LabelNode) insn, (LabelNode) insn);
		}
	}

	InsnList importantNodeList = new InsnList();

	for (AbstractInsnNode insn = list.getFirst(); insn != null; insn = insn.getNext()) {
		if (insn instanceof LabelNode || insn instanceof LineNumberNode) {
			continue;
		}

		importantNodeList.add(insn.clone(labels));
	}
	return importantNodeList;
}
 

import org.objectweb.asm.tree.InsnList; //导入方法依赖的package包/类
private static InsnListSection insnListMatchesL(InsnList haystack, InsnList needle, int start, HashSet<LabelNode> controlFlowLabels) {
	int h = start, n = 0;

	for (; h < haystack.size() && n < needle.size(); h++) {
		AbstractInsnNode insn = haystack.get(h);

		if (insn.getType() == 15) {
			continue;
		}
		if (insn.getType() == 8 && !controlFlowLabels.contains(insn)) {
			continue;
		}
		if (!insnEqual(haystack.get(h), needle.get(n))) {
			return null;
		}
		n++;
	}
	if (n != needle.size()) {
		return null;
	}

	return new InsnListSection(haystack, start, h - 1);
}
 

import org.objectweb.asm.tree.InsnList; //导入方法依赖的package包/类
@Nullable
private static MethodInsnNode findConstructorInvocation(
        @NonNull MethodNode method,
        @NonNull String className) {
    InsnList nodes = method.instructions;
    for (int i = 0, n = nodes.size(); i < n; i++) {
        AbstractInsnNode instruction = nodes.get(i);
        if (instruction.getOpcode() == Opcodes.INVOKESPECIAL) {
            MethodInsnNode call = (MethodInsnNode) instruction;
            if (className.equals(call.owner)) {
                return call;
            }
        }
    }

    return null;
}
 

import org.objectweb.asm.tree.InsnList; //导入方法依赖的package包/类
private static MethodNode findEnumSwitchUsage(ClassNode classNode, String owner) {
    String target = ENUM_SWITCH_PREFIX + owner.replace('/', '$');
    @SuppressWarnings("rawtypes") // ASM API
    List methodList = classNode.methods;
    for (Object f : methodList) {
        MethodNode method = (MethodNode) f;
        InsnList nodes = method.instructions;
        for (int i = 0, n = nodes.size(); i < n; i++) {
            AbstractInsnNode instruction = nodes.get(i);
            if (instruction.getOpcode() == Opcodes.GETSTATIC) {
                FieldInsnNode field = (FieldInsnNode) instruction;
                if (field.name.equals(target)) {
                    return method;
                }
            }
        }
    }
    return null;
}
 

import org.objectweb.asm.tree.InsnList; //导入方法依赖的package包/类
private static boolean containsSimpleSdkCheck(@NonNull MethodNode method) {
    // Look for a compiled version of "if (Build.VERSION.SDK_INT op N) {"
    InsnList nodes = method.instructions;
    for (int i = 0, n = nodes.size(); i < n; i++) {
        AbstractInsnNode instruction = nodes.get(i);
        if (isSdkVersionLookup(instruction)) {
            AbstractInsnNode bipush = getNextInstruction(instruction);
            if (bipush != null && bipush.getOpcode() == Opcodes.BIPUSH) {
                AbstractInsnNode ifNode = getNextInstruction(bipush);
                if (ifNode != null && ifNode.getType() == AbstractInsnNode.JUMP_INSN) {
                    return true;
                }
            }
        }
    }

    return false;
}
 

import org.objectweb.asm.tree.InsnList; //导入方法依赖的package包/类
private void injectFieldsIn(MethodNode rootNode)
{
    InsnList instructions = rootNode.instructions;
    if (instructions.size() == 0)
    {
        return;
    }
    AbstractInsnNode node = instructions.getFirst();
    while (node != null)
    {
        while (! (node instanceof FieldInsnNode) || ! AsmUtils.isPutField(node.getOpcode()))
        {
            node = node.getNext();
            if (node == null)
            {
                return;
            }
        }
        this.trackFieldToInject((FieldInsnNode) node, rootNode.instructions);
        node = node.getNext();
    }
}
 

import org.objectweb.asm.tree.InsnList; //导入方法依赖的package包/类
public static InsnList getImportantList(InsnList list) {
	if (list.size() == 0) {
		return list;
	}

	HashMap<LabelNode, LabelNode> labels = new HashMap<LabelNode, LabelNode>();
	for (AbstractInsnNode insn = list.getFirst(); insn != null; insn = insn.getNext()) {
		if (insn instanceof LabelNode) {
			labels.put((LabelNode) insn, (LabelNode) insn);
		}
	}

	InsnList importantNodeList = new InsnList();
	for (AbstractInsnNode insn = list.getFirst(); insn != null; insn = insn.getNext()) {
		if (insn instanceof LabelNode || insn instanceof LineNumberNode) {
			continue;
		}

		importantNodeList.add(insn.clone(labels));
	}
	return importantNodeList;
}
 

import org.objectweb.asm.tree.InsnList; //导入方法依赖的package包/类
private static InsnListSection insnListMatchesL(InsnList haystack, InsnList needle, int start, HashSet<LabelNode> controlFlowLabels) {
	int h = start, n = 0;
	for (; h < haystack.size() && n < needle.size(); h++) {
		AbstractInsnNode insn = haystack.get(h);
		if (insn.getType() == 15) {
			continue;
		}
		if (insn.getType() == 8 && !controlFlowLabels.contains(insn)) {
			continue;
		}

		if (!insnEqual(haystack.get(h), needle.get(n))) {
			return null;
		}
		n++;
	}
	if (n != needle.size()) {
		return null;
	}

	return new InsnListSection(haystack, start, h - 1);
}
 

import org.objectweb.asm.tree.InsnList; //导入方法依赖的package包/类
public static void viewByteCode(byte[] bytecode) {
    ClassReader cr = new ClassReader(bytecode);
    ClassNode cn = new ClassNode();
    cr.accept(cn, 0);
    final List<MethodNode> mns = cn.methods;
    Printer printer = new Textifier();
    TraceMethodVisitor mp = new TraceMethodVisitor(printer);
    for (MethodNode mn : mns) {
        InsnList inList = mn.instructions;
        System.out.println(mn.name);
        for (int i = 0; i < inList.size(); i++) {
            inList.get(i).accept(mp);
            StringWriter sw = new StringWriter();
            printer.print(new PrintWriter(sw));
            printer.getText().clear();
            System.out.print(sw.toString());
        }
    }
}