/
HexDumper.java
363 lines (299 loc) · 10.7 KB
/
HexDumper.java
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package org.isk.jvmhardcore.pjba.dumper;
import org.isk.jvmhardcore.pjba.instruction.meta.MetaInstruction;
import org.isk.jvmhardcore.pjba.instruction.meta.MetaInstruction.ArgsType;
import org.isk.jvmhardcore.pjba.instruction.meta.MetaInstructions;
import org.isk.jvmhardcore.pjba.structure.ClassFile;
import org.isk.jvmhardcore.pjba.util.BytecodeUtils;
import org.isk.jvmhardcore.pjba.visitor.Visitor;
public class HexDumper implements Visitor {
final private ClassFile classFile;
final private StringBuilder pjb;
private int hexCounter;
private int constantCount = 1;
public HexDumper(ClassFile classFile) {
super();
this.classFile = classFile;
this.pjb = new StringBuilder();
}
public String dump() {
this.classFile.accept(this);
return this.pjb.toString();
}
@Override
public void visitMagicNumber(int magicNumber) {
this.pjb.append(this.getHexAndAddInt());
this.pjb.append("\t0x");
this.pjb.append(Integer.toHexString(magicNumber)).append("\n");
}
@Override
public void visitVersion(int version) {
final int minorVersion = version >> 8;
final int majorVersion = version & 0xffff;
this.pjb.append(this.getHexAndAddShort()).append("\t");
this.pjb.append("Minor version: ").append(minorVersion).append("\n");
this.pjb.append(this.getHexAndAddShort()).append("\t");
this.pjb.append("Major version: ").append(majorVersion).append("\n");
}
@Override
public void visitConstantPoolSize(int size) {
this.pjb.append(this.getHexAndAddShort()).append("\t");
this.pjb.append("Constant Pool: ").append(size).append("\n");
}
@Override
public void visitClassAccessFlags(int accessFlags) {
this.pjb.append(this.getHexAndAddShort()).append("\t");
this.pjb.append("Access Flags: ").append(StringValues.getClassModifiers(accessFlags)).append("\n");
}
@Override
public void visitThisClass(int thisClass) {
this.pjb.append(this.getHexAndAddShort()).append("\t");
this.pjb.append("This: #").append(thisClass).append("\n");
}
@Override
public void visitSuperClass(int superClass) {
this.pjb.append(this.getHexAndAddShort()).append("\t");
this.pjb.append("Super: #").append(superClass).append("\n");
}
@Override
public void visitInterfacesSize(int length) {
this.pjb.append(this.getHexAndAddShort()).append("\t");
this.pjb.append("Interfaces: ").append(length).append("\n");
}
@Override
public void visitFieldsSize(int size) {
this.pjb.append(this.getHexAndAddShort()).append("\t");
this.pjb.append("Fields: ").append(size).append("\n");
}
@Override
public void visitMethodsSize(int size) {
this.pjb.append(this.getHexAndAddShort()).append("\t");
this.pjb.append("Methods: ").append(size).append("\n");
}
@Override
public void visitClassAttributeSize(int size) {
this.pjb.append(this.getHexAndAddShort()).append("\t");
this.pjb.append("Class Attributes: ").append(size).append("\n");
}
@Override
public void visitConstantTag(int tag) {
this.pjb.append(this.getHexAndAddByte()).append("\t");
final String tagName = StringValues.constantTagName(tag);
this.pjb.append(" #").append(this.constantCount++).append(" ").append(tagName).append(" ");
}
@Override
public void visitConstantUTF8(String value) {
this.getHexAndAddString(value);
this.pjb.append(" ").append(value).append("\n");
}
@Override
public void visitConstantInteger(int integer) {
this.getHexAndAddInt();
this.pjb.append(" ").append(integer).append("\n");
}
@Override
public void visitConstantFloat(float floatValue) {
this.getHexAndAddInt();
this.pjb.append(" ").append(floatValue).append("\n");
}
@Override
public void visitConstantLong(long longValue) {
this.getHexAndAddLong();
this.constantCount++;
this.pjb.append(" ").append(longValue).append("\n");
}
@Override
public void visitConstantDouble(double doubleValue) {
this.getHexAndAddLong();
this.constantCount++;
this.pjb.append(" ").append(doubleValue).append("\n");
}
@Override
public void visitConstantClass(int nameIndex) {
this.getHexAndAddShort();
this.pjb.append(" #").append(nameIndex).append("\n");
}
@Override
public void visitConstantString(int utf8Index) {
this.getHexAndAddShort();
this.pjb.append(" #").append(utf8Index).append("\n");
}
@Override
public void visitMethodAccessFlags(int accessFlags) {
this.pjb.append(this.getHexAndAddShort()).append("\t");
this.pjb.append("+ Access Flags: ").append(StringValues.getMethodModifiers(accessFlags)).append("\n");
}
@Override
public void visitMethodNameIndex(int nameIndex) {
this.pjb.append(this.getHexAndAddShort()).append("\t");
this.pjb.append(" Name index: #").append(nameIndex).append("\n");
}
@Override
public void visitMethodDescriptorIndex(int descriptorIndex) {
this.pjb.append(this.getHexAndAddShort()).append("\t");
this.pjb.append(" Descriptor index: #").append(descriptorIndex).append("\n");
}
@Override
public void visitMethodAttributesSize(int size) {
this.pjb.append(this.getHexAndAddShort()).append("\t");
this.pjb.append(" Method Attributes: ").append(size).append("\n");
}
@Override
public void visitAttributeNameIndex(int nameIndex) {
this.pjb.append(this.getHexAndAddShort()).append("\t");
this.pjb.append(" + Attribute name index: #").append(nameIndex).append("\n");
}
@Override
public void visitAttributeLength(int length) {
this.pjb.append(this.getHexAndAddShort()).append("\t");
this.pjb.append(" Length: ").append(length).append("\n");
}
@Override
public void visitCodeMaxStack(int maxStack) {
this.pjb.append(this.getHexAndAddShort()).append("\t");
this.pjb.append(" Max stack: ").append(maxStack).append("\n");
}
@Override
public void visitCodeMaxLocals(int maxLocals) {
this.pjb.append(this.getHexAndAddShort()).append("\t");
this.pjb.append(" Max locals: ").append(maxLocals).append("\n");
}
@Override
public void visitCodeLength(int codeLength) {
this.getHexAndAddInt();
}
@Override
public void visitCodeExceptionsSize(int size) {
this.pjb.append(this.getHexAndAddShort()).append("\t");
this.pjb.append(" Exceptions: ").append(size).append("\n");
}
@Override
public void visitCodeAttributesSize(int size) {
this.pjb.append(this.getHexAndAddShort()).append("\t");
this.pjb.append(" Code Attributes: ").append(size).append("\n");
}
private MetaInstruction metaInstruction;
@Override
public void visitOpcode(int opcode) {
this.metaInstruction = MetaInstructions.getMetaInstruction(opcode);
this.pjb.append(this.getHexAndAddByte()).append("\t");
this.pjb.append(" ").append(this.metaInstruction.getMnemonic());
if (this.metaInstruction.getArgsType() == ArgsType.NONE) {
this.pjb.append("\n");
}
}
@Override
public void visitInstructionByte(int value) {
final ArgsType type = this.metaInstruction.getArgsType();
switch (type) {
case BYTE_VALUE:
this.pjb.append(" ").append(value).append("\n");
break;
case LV_INDEX:
this.pjb.append(" ").append(BytecodeUtils.unsign((byte) value)).append("\n");
break;
case IFS_CONSTANT:
this.pjb.append(" #").append(BytecodeUtils.unsign((byte) value)).append("\n");
break;
default:
throw new RuntimeException("Incorrect type: " + type + " for the value: " + value);
}
this.getHexAndAdd(1);
}
@Override
public void visitInstructionShort(int value) {
final ArgsType type = this.metaInstruction.getArgsType();
switch (type) {
case SHORT_VALUE:
this.pjb.append(" ").append(value).append("\n");
break;
case W_IFS_CONSTANT:
case LD_CONSTANT:
this.pjb.append(" #").append(BytecodeUtils.unsign((short) value)).append("\n");
break;
default:
throw new RuntimeException("Incorrect type: " + type + " for the value: " + value);
}
this.getHexAndAdd(2);
}
@Override
public void visitInstructionIinc(int indexInLV, int constant) {
this.pjb.append(" ").append(BytecodeUtils.unsign((byte) indexInLV))
.append(" ").append(constant).append("\n");
this.getHexAndAdd(2);
}
@Override
public void visitInstructionWideIinc(int widenedOpcode, int indexInLV, int constant) {
this.pjb.append(" ").append(MetaInstructions.getMnemonic(widenedOpcode))
.append(" ").append(BytecodeUtils.unsign((short) indexInLV))
.append(" ").append(constant).append("\n");
this.getHexAndAdd(5);
}
@Override
public void visitInstructionWideLoadStore(int widenedOpcode, int indexInLV) {
this.pjb.append(" ").append(MetaInstructions.getMnemonic(widenedOpcode))
.append(" ").append(BytecodeUtils.unsign((short) indexInLV)).append("\n");
this.getHexAndAdd(3);
}
// -------------------------------------------------------------------------------------------------------------------
// Utilities
// -------------------------------------------------------------------------------------------------------------------
private String getHexAndAdd(int nbOfBytes) {
final String hex = this.getHexPadded(this.hexCounter);
this.hexCounter += nbOfBytes;
return hex;
}
private String getHexAndAddByte() {
final String hex = this.getHexPadded(this.hexCounter);
this.hexCounter += 1;
return hex;
}
private String getHexAndAddShort() {
final String hex = this.getHexPadded(this.hexCounter);
this.hexCounter += 2;
return hex;
}
private String getHexAndAddInt() {
final String hex = this.getHexPadded(this.hexCounter);
this.hexCounter += 4;
return hex;
}
private String getHexAndAddLong() {
final String hex = this.getHexPadded(this.hexCounter);
this.hexCounter += 8;
return hex;
}
private Object getHexAndAddString(final String str) {
final String hex = this.getHexPadded(this.hexCounter);
final int size = this.getStringLength(str) + 2; // size in short
this.hexCounter += size;
return hex;
}
private String getHexPadded(int value) {
final String hexString = Integer.toHexString(value);
return this.pad(hexString, 4, "0");
}
private String pad(String value, int pad, String placeholder) {
final StringBuilder sb = new StringBuilder();
for (int i = value.length(); i < pad; i++) {
sb.append(placeholder);
}
sb.append(value);
return sb.toString();
}
private int getStringLength(final String str) {
final int strlen = str.length();
int utflen = 0;
int c = 0;
for (int i = 0; i < strlen; i++) {
c = str.charAt(i);
if ((c >= 0x0001) && (c <= 0x007F)) {
utflen++;
} else if (c > 0x07FF) {
utflen += 3;
} else {
utflen += 2;
}
}
return utflen;
}
}