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package org.redkale.asm;
import java.util.*;
/**
* MethodVisitor 的调试类
*
* 详情见: https://redkale.org
*
* @author zhangjx
*/
public class MethodDebugVisitor {
private final MethodVisitor visitor;
private boolean debug = false;
public MethodDebugVisitor setDebug(boolean d) {
debug = d;
return this;
}
public void debugLine() {
if (!debug) return;
System.out.println();
System.out.println();
System.out.println();
}
private final Map labels = new LinkedHashMap<>();
private static final String[] opcodes = new String[200]; //0 -18
static {
try {
for (java.lang.reflect.Field field : Opcodes.class.getFields()) {
String name = field.getName();
if (name.startsWith("ASM")) continue;
if (name.startsWith("V1_")) continue;
if (name.startsWith("ACC_")) continue;
if (name.startsWith("T_")) continue;
if (name.startsWith("H_")) continue;
if (name.startsWith("F_")) continue;
if (field.getType() != int.class) continue;
opcodes[(int) (Integer) field.get(null)] = name;
}
} catch (Exception ex) {
throw new RuntimeException(ex); //不可能会发生
}
}
public MethodDebugVisitor(MethodVisitor visitor) {
//super(Opcodes.ASM5, visitor);
this.visitor = visitor;
}
public AnnotationVisitor visitParameterAnnotation(int i, String string, boolean bln) {
AnnotationVisitor av = visitor.visitParameterAnnotation(i, string, bln);
if (debug) System.out.println("mv.visitParameterAnnotation(" + i + ", \"" + string + "\", " + bln + ");");
return av;
}
public AnnotationVisitor visitAnnotation(String desc, boolean flag) {
AnnotationVisitor av = visitor.visitAnnotation(desc, flag);
if (debug) System.out.println("mv.visitAnnotation(\"" + desc + "\", " + flag + ");");
return av;
}
public AnnotationVisitor visitTypeAnnotation(int typeRef, TypePath typePath, String desc, boolean visible) {
AnnotationVisitor av = visitor.visitTypeAnnotation(typeRef, typePath, desc, visible);
if (debug) System.out.println("mv.visitTypeAnnotation(" + typeRef + ", " + typePath + ", \"" + desc + "\", " + visible + ");");
return av;
}
public void visitParameter(String name, int access) {
visitor.visitParameter(name, access);
if (debug) System.out.println("mv.visitParameter(" + name + ", " + access + ");");
}
public void visitVarInsn(int opcode, int var) {
visitor.visitVarInsn(opcode, var);
if (debug) System.out.println("mv.visitVarInsn(" + opcodes[opcode] + ", " + var + ");");
}
public void visitFrame(int type, int nLocal, Object[] local, int nStack, Object[] stack) {
visitor.visitFrame(type, nLocal, local, nStack, stack);
if (debug) {
String typestr = "" + type;
if (type == -1) {
typestr = "Opcodes.F_NEW";
} else if (type == 1) {
typestr = "Opcodes.F_APPEND";
} else if (type == 2) {
typestr = "Opcodes.F_CHOP";
} else if (type == 3) {
typestr = "Opcodes.F_SAME";
} else if (type == 4) {
typestr = "Opcodes.F_SAME1";
}
System.out.println("mv.visitFrame(" + typestr + ", " + nLocal + ", " + Arrays.toString(local) + ", " + nStack + ", " + Arrays.toString(stack) + ");");
}
}
public void visitJumpInsn(int opcode, Label var) { //调用此方法的 ClassWriter 必须由 COMPUTE_FRAMES 构建
visitor.visitJumpInsn(opcode, var);
if (debug) {
Integer index = labels.get(var);
if (index == null) {
index = labels.size();
labels.put(var, index);
System.out.println("Label l" + index + " = new Label();");
}
System.out.println("mv.visitJumpInsn(" + opcodes[opcode] + ", l" + index + ");");
}
}
public void visitCode() {
visitor.visitCode();
if (debug) System.out.println("mv.visitCode();");
}
public void visitLabel(Label var) {
visitor.visitLabel(var);
if (debug) {
Integer index = labels.get(var);
if (index == null) {
index = labels.size();
labels.put(var, index);
System.out.println("Label l" + index + " = new Label();");
}
System.out.println("mv.visitLabel(l" + index + ");");
}
}
public void visitMethodInsn(int opcode, String owner, String name, String desc, boolean itf) {
visitor.visitMethodInsn(opcode, owner, name, desc, itf);
if (debug) System.out.println("mv.visitMethodInsn(" + opcodes[opcode] + ", \"" + owner + "\", \"" + name + "\", \"" + desc + "\", " + itf + ");");
}
public void visitFieldInsn(int opcode, String owner, String name, String desc) {
visitor.visitFieldInsn(opcode, owner, name, desc);
if (debug) System.out.println("mv.visitFieldInsn(" + opcodes[opcode] + ", \"" + owner + "\", \"" + name + "\", \"" + desc + "\");");
}
public void visitTypeInsn(int opcode, String type) {
visitor.visitTypeInsn(opcode, type);
if (debug) System.out.println("mv.visitTypeInsn(" + opcodes[opcode] + ", \"" + type + "\");");
}
public void visitInsn(int opcode) {
visitor.visitInsn(opcode);
if (debug) System.out.println("mv.visitInsn(" + opcodes[opcode] + ");");
}
public void visitIntInsn(int opcode, int value) {
visitor.visitIntInsn(opcode, value);
if (debug) System.out.println("mv.visitIntInsn(" + opcodes[opcode] + ", " + value + ");");
}
public void visitIincInsn(int opcode, int value) {
visitor.visitIincInsn(opcode, value);
if (debug) System.out.println("mv.visitIincInsn(" + opcode + ", " + value + ");");
}
public void visitLdcInsn(Object o) {
visitor.visitLdcInsn(o);
if (debug) {
if (o instanceof CharSequence) {
System.out.println("mv.visitLdcInsn(\"" + o + "\");");
} else if (o instanceof org.redkale.asm.Type) {
System.out.println("mv.visitLdcInsn(Type.getType(\"" + o + "\"));");
} else {
System.out.println("mv.visitLdcInsn(" + o + ");");
}
}
}
public void visitMaxs(int maxStack, int maxLocals) {
visitor.visitMaxs(maxStack, maxLocals);
if (debug) System.out.println("mv.visitMaxs(" + maxStack + ", " + maxLocals + ");");
}
public void visitEnd() {
visitor.visitEnd();
if (debug) System.out.println("mv.visitEnd();\r\n\r\n\r\n");
}
}