package com.zarbosoft.semicompiled;
class Main {
public static void myMain() {
int x = 3;
if (x == 9) {
x = 4;
} else if (x == 12) {
x = 12;
} else {
x = 7;
}
}
}
Classfile /tmp/semicompiled-67hsRfey-8451327216647478295/com/zarbosoft/semicompiled/Main.class
Last modified Jun 2, 2024; size 240 bytes
MD5 checksum 1d6f18735bb0d14e6113e3dc8c2e185f
class com.zarbosoft.semicompiled.Main
minor version: 0
major version: 52
flags: (0x0020) ACC_SUPER
this_class: #2 // com/zarbosoft/semicompiled/Main
super_class: #3 // java/lang/Object
interfaces: 0, fields: 0, methods: 2, attributes: 0
Constant pool:
#1 = Methodref #3.#9 // java/lang/Object."<init>":()V
#2 = Class #10 // com/zarbosoft/semicompiled/Main
#3 = Class #11 // java/lang/Object
#4 = Utf8 <init>
#5 = Utf8 ()V
#6 = Utf8 Code
#7 = Utf8 myMain
#8 = Utf8 StackMapTable
#9 = NameAndType #4:#5 // "<init>":()V
#10 = Utf8 com/zarbosoft/semicompiled/Main
#11 = Utf8 java/lang/Object
{
com.zarbosoft.semicompiled.Main();
descriptor: ()V
flags: (0x0000)
Code:
stack=1, locals=1, args_size=1
0: aload_0
1: invokespecial #1 // Method java/lang/Object."<init>":()V
4: return
public static void myMain();
descriptor: ()V
flags: (0x0009) ACC_PUBLIC, ACC_STATIC
Code:
stack=2, locals=1, args_size=0
0: iconst_3
1: istore_0
2: iload_0
3: bipush 9
5: if_icmpne 13
8: iconst_4
9: istore_0
10: goto 28
13: iload_0
14: bipush 12
16: if_icmpne 25
19: bipush 12
21: istore_0
22: goto 28
25: bipush 7
27: istore_0
28: return
StackMapTable: number_of_entries = 3
frame_type = 252 /* append */
offset_delta = 13
locals = [ int ]
frame_type = 11 /* same */
frame_type = 2 /* same */
}
package asm.com.zarbosoft.semicompiled;
import org.objectweb.asm.AnnotationVisitor;
import org.objectweb.asm.Attribute;
import org.objectweb.asm.ClassReader;
import org.objectweb.asm.ClassWriter;
import org.objectweb.asm.ConstantDynamic;
import org.objectweb.asm.FieldVisitor;
import org.objectweb.asm.Handle;
import org.objectweb.asm.Label;
import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.Opcodes;
import org.objectweb.asm.RecordComponentVisitor;
import org.objectweb.asm.Type;
import org.objectweb.asm.TypePath;
public class MainDump implements Opcodes {
public static byte[] dump() throws Exception {
ClassWriter classWriter = new ClassWriter(0);
FieldVisitor fieldVisitor;
RecordComponentVisitor recordComponentVisitor;
MethodVisitor methodVisitor;
AnnotationVisitor annotationVisitor0;
classWriter.visit(
V1_8, ACC_SUPER, "com/zarbosoft/semicompiled/Main", null, "java/lang/Object", null);
{
methodVisitor = classWriter.visitMethod(0, "<init>", "()V", null, null);
methodVisitor.visitCode();
methodVisitor.visitVarInsn(ALOAD, 0);
methodVisitor.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false);
methodVisitor.visitInsn(RETURN);
methodVisitor.visitMaxs(1, 1);
methodVisitor.visitEnd();
}
{
methodVisitor = classWriter.visitMethod(ACC_PUBLIC | ACC_STATIC, "myMain", "()V", null, null);
methodVisitor.visitCode();
methodVisitor.visitInsn(ICONST_3);
methodVisitor.visitVarInsn(ISTORE, 0);
methodVisitor.visitVarInsn(ILOAD, 0);
methodVisitor.visitIntInsn(BIPUSH, 9);
Label label0 = new Label();
methodVisitor.visitJumpInsn(IF_ICMPNE, label0);
methodVisitor.visitInsn(ICONST_4);
methodVisitor.visitVarInsn(ISTORE, 0);
Label label1 = new Label();
methodVisitor.visitJumpInsn(GOTO, label1);
methodVisitor.visitLabel(label0);
methodVisitor.visitFrame(Opcodes.F_APPEND, 1, new Object[] {Opcodes.INTEGER}, 0, null);
methodVisitor.visitVarInsn(ILOAD, 0);
methodVisitor.visitIntInsn(BIPUSH, 12);
Label label2 = new Label();
methodVisitor.visitJumpInsn(IF_ICMPNE, label2);
methodVisitor.visitIntInsn(BIPUSH, 12);
methodVisitor.visitVarInsn(ISTORE, 0);
methodVisitor.visitJumpInsn(GOTO, label1);
methodVisitor.visitLabel(label2);
methodVisitor.visitFrame(Opcodes.F_SAME, 0, null, 0, null);
methodVisitor.visitIntInsn(BIPUSH, 7);
methodVisitor.visitVarInsn(ISTORE, 0);
methodVisitor.visitLabel(label1);
methodVisitor.visitFrame(Opcodes.F_SAME, 0, null, 0, null);
methodVisitor.visitInsn(RETURN);
methodVisitor.visitMaxs(2, 1);
methodVisitor.visitEnd();
}
classWriter.visitEnd();
return classWriter.toByteArray();
}
}
Classfile /tmp/semicompiled-67hsRfey-8451327216647478295/com/zarbosoft/semicompiled/Main.class
Last modified Jun 2, 2024; size 427 bytes
MD5 checksum 8fb5eae9a83f4ee387c7dfb56029dad1
Compiled from "Main.java"
class com.zarbosoft.semicompiled.Main
minor version: 0
major version: 52
flags: (0x0020) ACC_SUPER
this_class: #2 // com/zarbosoft/semicompiled/Main
super_class: #3 // java/lang/Object
interfaces: 0, fields: 0, methods: 2, attributes: 1
Constant pool:
#1 = Methodref #3.#17 // java/lang/Object."<init>":()V
#2 = Class #18 // com/zarbosoft/semicompiled/Main
#3 = Class #19 // java/lang/Object
#4 = Utf8 <init>
#5 = Utf8 ()V
#6 = Utf8 Code
#7 = Utf8 LineNumberTable
#8 = Utf8 LocalVariableTable
#9 = Utf8 this
#10 = Utf8 Lcom/zarbosoft/semicompiled/Main;
#11 = Utf8 myMain
#12 = Utf8 x
#13 = Utf8 I
#14 = Utf8 StackMapTable
#15 = Utf8 SourceFile
#16 = Utf8 Main.java
#17 = NameAndType #4:#5 // "<init>":()V
#18 = Utf8 com/zarbosoft/semicompiled/Main
#19 = Utf8 java/lang/Object
{
com.zarbosoft.semicompiled.Main();
descriptor: ()V
flags: (0x0000)
Code:
stack=1, locals=1, args_size=1
0: aload_0
1: invokespecial #1 // Method java/lang/Object."<init>":()V
4: return
LineNumberTable:
line 3: 0
LocalVariableTable:
Start Length Slot Name Signature
0 5 0 this Lcom/zarbosoft/semicompiled/Main;
public static void myMain();
descriptor: ()V
flags: (0x0009) ACC_PUBLIC, ACC_STATIC
Code:
stack=2, locals=1, args_size=0
0: iconst_3
1: istore_0
2: iload_0
3: bipush 9
5: if_icmpne 13
8: iconst_4
9: istore_0
10: goto 28
13: iload_0
14: bipush 12
16: if_icmpne 25
19: bipush 12
21: istore_0
22: goto 28
25: bipush 7
27: istore_0
28: return
LineNumberTable:
line 5: 0
line 6: 28
LocalVariableTable:
Start Length Slot Name Signature
2 27 0 x I
StackMapTable: number_of_entries = 3
frame_type = 252 /* append */
offset_delta = 13
locals = [ int ]
frame_type = 11 /* same */
frame_type = 2 /* same */
}
SourceFile: "Main.java"
package asm.com.zarbosoft.semicompiled;
import org.objectweb.asm.AnnotationVisitor;
import org.objectweb.asm.Attribute;
import org.objectweb.asm.ClassReader;
import org.objectweb.asm.ClassWriter;
import org.objectweb.asm.ConstantDynamic;
import org.objectweb.asm.FieldVisitor;
import org.objectweb.asm.Handle;
import org.objectweb.asm.Label;
import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.Opcodes;
import org.objectweb.asm.RecordComponentVisitor;
import org.objectweb.asm.Type;
import org.objectweb.asm.TypePath;
public class MainDump implements Opcodes {
public static byte[] dump() throws Exception {
ClassWriter classWriter = new ClassWriter(0);
FieldVisitor fieldVisitor;
RecordComponentVisitor recordComponentVisitor;
MethodVisitor methodVisitor;
AnnotationVisitor annotationVisitor0;
classWriter.visit(
V1_8, ACC_SUPER, "com/zarbosoft/semicompiled/Main", null, "java/lang/Object", null);
classWriter.visitSource("Main.java", null);
{
methodVisitor = classWriter.visitMethod(0, "<init>", "()V", null, null);
methodVisitor.visitCode();
Label label0 = new Label();
methodVisitor.visitLabel(label0);
methodVisitor.visitLineNumber(3, label0);
methodVisitor.visitVarInsn(ALOAD, 0);
methodVisitor.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false);
methodVisitor.visitInsn(RETURN);
Label label1 = new Label();
methodVisitor.visitLabel(label1);
methodVisitor.visitLocalVariable(
"this", "Lcom/zarbosoft/semicompiled/Main;", null, label0, label1, 0);
methodVisitor.visitMaxs(1, 1);
methodVisitor.visitEnd();
}
{
methodVisitor = classWriter.visitMethod(ACC_PUBLIC | ACC_STATIC, "myMain", "()V", null, null);
methodVisitor.visitCode();
Label label0 = new Label();
methodVisitor.visitLabel(label0);
methodVisitor.visitLineNumber(5, label0);
methodVisitor.visitInsn(ICONST_3);
methodVisitor.visitVarInsn(ISTORE, 0);
Label label1 = new Label();
methodVisitor.visitLabel(label1);
methodVisitor.visitVarInsn(ILOAD, 0);
methodVisitor.visitIntInsn(BIPUSH, 9);
Label label2 = new Label();
methodVisitor.visitJumpInsn(IF_ICMPNE, label2);
methodVisitor.visitInsn(ICONST_4);
methodVisitor.visitVarInsn(ISTORE, 0);
Label label3 = new Label();
methodVisitor.visitJumpInsn(GOTO, label3);
methodVisitor.visitLabel(label2);
methodVisitor.visitFrame(Opcodes.F_APPEND, 1, new Object[] {Opcodes.INTEGER}, 0, null);
methodVisitor.visitVarInsn(ILOAD, 0);
methodVisitor.visitIntInsn(BIPUSH, 12);
Label label4 = new Label();
methodVisitor.visitJumpInsn(IF_ICMPNE, label4);
methodVisitor.visitIntInsn(BIPUSH, 12);
methodVisitor.visitVarInsn(ISTORE, 0);
methodVisitor.visitJumpInsn(GOTO, label3);
methodVisitor.visitLabel(label4);
methodVisitor.visitFrame(Opcodes.F_SAME, 0, null, 0, null);
methodVisitor.visitIntInsn(BIPUSH, 7);
methodVisitor.visitVarInsn(ISTORE, 0);
methodVisitor.visitLabel(label3);
methodVisitor.visitLineNumber(6, label3);
methodVisitor.visitFrame(Opcodes.F_SAME, 0, null, 0, null);
methodVisitor.visitInsn(RETURN);
Label label5 = new Label();
methodVisitor.visitLabel(label5);
methodVisitor.visitLocalVariable("x", "I", null, label1, label5, 0);
methodVisitor.visitMaxs(2, 1);
methodVisitor.visitEnd();
}
classWriter.visitEnd();
return classWriter.toByteArray();
}
}
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