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jode
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use gnu.bytecode directly, without java.lang.reflect

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git-svn-id: https://svn.code.sf.net/p/jode/code/trunk@98 379699f6-c40d-0410-875b-85095c16579e
stable
jochen 26 years ago
parent 771af8c5bb
commit 3136614896
1 changed files with 100 additions and 80 deletions
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  1. 184
      jode/jode/decompiler/MethodAnalyzer.java

184
jode/jode/decompiler/MethodAnalyzer.java
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@ -18,76 +18,109 @@
*/
package jode;
import java.lang.reflect.*;
import java.lang.reflect.Modifier;
import gnu.bytecode.Attribute;
import gnu.bytecode.CodeAttr;
import gnu.bytecode.Spy;
public class MethodAnalyzer implements Analyzer {
JodeEnvironment env;
CodeAnalyzer code = null;
ClassAnalyzer classAnalyzer;
boolean isConstructor;
Method method;
Constructor constr;
private MethodAnalyzer(ClassAnalyzer cla, Method m, Constructor c,
JodeEnvironment e)
{
classAnalyzer = cla;
method = m;
constr = c;
isConstructor = (c != null);
env = e;
String name = isConstructor ? "<init>" : m.getName();
Class[] paramTypes = (isConstructor
? c.getParameterTypes()
: m.getParameterTypes());
gnu.bytecode.Method mdef = cla.classType.getMethods();
while (mdef != null) {
if (mdef.getName().equals(name)) {
gnu.bytecode.Type[] argtypes = mdef.getParameterTypes();
if (argtypes.length == paramTypes.length) {
int i;
for (i=0; i<argtypes.length; i++) {
if (!Type.tType(paramTypes[i]).equals(Type.tType(argtypes[i].getSignature())))
break;
}
if (i == argtypes.length)
break;
}
}
mdef = mdef.getNext();
int modifiers;
String methodName;
MethodType methodType;
Type[] exceptions;
// private MethodAnalyzer(ClassAnalyzer cla, Method m, Constructor c,
// JodeEnvironment e)
// {
// classAnalyzer = cla;
// isConstructor = (c != null);
// env = e;
// this.modifiers = isConstructor
// ? c.getModifiers() : m.getModifiers();
// {
// Class[] exceptClasses = isConstructor
// ? c.getExceptionTypes() : m.getExceptionTypes();
// this.exceptions = new Type[exceptClasses.length];
// for (int i=0; i< exceptClasses.length; i++)
// exceptions[i] = Type.tType(exceptClasses[i]);
// }
// {
// Class[] paramTypes = (isConstructor
// ? c.getParameterTypes()
// : m.getParameterTypes());
// Class returnType = (isConstructor
// ? Void.TYPE : m.getReturnType());
// methodType = new MethodType
// (!isConstructor && Modifier.isStatic(modifiers),
// paramTypes, returnType);
// methodName = isConstructor ? "<init>" : m.getName();
// }
// gnu.bytecode.Method mdef;
// for (mdef = cla.classType.getMethods(); ; mdef = mdef.getNext()) {
// if (mdef.getName().equals(methodName)) {
// MethodType type = new MethodType(mdef.getStaticFlag(),
// mdef.getSignature());
// if (type.equals(methodType))
// break;
// }
// }
// Attribute attr = Attribute.get(mdef, "Code");
// if (attr != null && attr instanceof CodeAttr)
// code = new CodeAnalyzer(this, (CodeAttr) attr, env);
// }
public MethodAnalyzer(ClassAnalyzer cla, gnu.bytecode.Method mdef,
JodeEnvironment env) {
this.classAnalyzer = cla;
this.env = env;
this.modifiers = Spy.getModifiers(mdef);
this.methodType = new MethodType(mdef.getStaticFlag(),
mdef.getSignature());
this.methodName = mdef.getName();
this.isConstructor =
methodName.equals("<init>") || methodName.equals("<clinit>");
Attribute codeattr = Attribute.get(mdef, "Code");
if (codeattr != null && codeattr instanceof CodeAttr)
code = new CodeAnalyzer(this, (CodeAttr) codeattr, env);
Attribute excattr = Attribute.get(mdef, "Exceptions");
if (excattr == null) {
exceptions = new Type[0];
} else {
java.io.DataInputStream stream = Spy.getAttributeStream
((gnu.bytecode.MiscAttr) excattr);
try {
int throwCount = stream.readUnsignedShort();
this.exceptions = new Type[throwCount];
for (int t=0; t< throwCount; t++) {
int idx = stream.readUnsignedShort();
gnu.bytecode.CpoolClass cpcls = (gnu.bytecode.CpoolClass)
classAnalyzer.getConstant(idx);
exceptions[t] = Type.tClass(cpcls.getName().getString());
}
} catch (java.io.IOException ex) {
throw new AssertError("exception attribute too long?");
}
Attribute attr = Attribute.get(mdef, "Code");
if (attr != null && attr instanceof CodeAttr)
code = new CodeAnalyzer(this, (CodeAttr) attr, env);
}
public MethodAnalyzer(ClassAnalyzer cla, Method method,
JodeEnvironment env)
{
this(cla, method, null, env);
}
public MethodAnalyzer(ClassAnalyzer cla, Constructor constr,
JodeEnvironment env)
{
this(cla, null, constr, env);
}
public int getParamCount() {
return isConstructor
? (constr.getParameterTypes().length + 1)
: ((Modifier.isStatic(method.getModifiers()) ? 0 : 1)
+ method.getParameterTypes().length);
return (methodType.isStatic() ? 0 : 1)
+ methodType.getParameterTypes().length;
}
public Type getReturnType() {
return isConstructor
? Type.tVoid : Type.tType(method.getReturnType());
return methodType.getReturnType();
}
public void analyze()
@ -97,30 +130,26 @@ public class MethodAnalyzer implements Analyzer {
return;
int offset = 0;
if (isConstructor || !Modifier.isStatic(method.getModifiers())) {
if (!methodType.isStatic()) {
LocalInfo clazz = code.getParamInfo(0);
clazz.setType(Type.tType(this.classAnalyzer.clazz));
clazz.setName("this");
offset++;
}
Class[] paramTypes = isConstructor
? constr.getParameterTypes() : method.getParameterTypes();
Type[] paramTypes = methodType.getParameterTypes();
for (int i=0; i< paramTypes.length; i++)
code.getParamInfo(offset+i).setType(Type.tType(paramTypes[i]));
code.getParamInfo(offset+i).setType(paramTypes[i]);
Class[] exceptions = isConstructor
? constr.getExceptionTypes() : method.getExceptionTypes();
for (int i= 0; i< exceptions.length; i++)
env.useClass(exceptions[i]);
exceptions[i].useType();
if (!isConstructor)
getReturnType().useType();
methodType.getReturnType().useType();
if (!Decompiler.immediateOutput) {
if (Decompiler.isVerbose)
System.err.print((isConstructor
? "<init>" : method.getName())+": ");
System.err.print(methodName+": ");
code.analyze();
if (Decompiler.isVerbose)
System.err.println("");
@ -135,56 +164,47 @@ public class MethodAnalyzer implements Analyzer {
// immediate output.
if (Decompiler.isVerbose)
System.err.print((isConstructor
? "<init>" : method.getName())+": ");
System.err.print(methodName+": ");
code.analyze();
if (Decompiler.isVerbose)
System.err.println("");
}
writer.println("");
String modif = Modifier.toString(isConstructor
? constr.getModifiers()
: method.getModifiers());
String modif = Modifier.toString(modifiers);
if (modif.length() > 0)
writer.print(modif+" ");
if (isConstructor && Modifier.isStatic(constr.getModifiers()))
if (isConstructor && methodType.isStatic())
writer.print(""); /* static block */
else {
if (isConstructor)
writer.print(env.classString(classAnalyzer.clazz));
else
writer.print(getReturnType().toString()
+ " " + method.getName());
+ " " + methodName);
writer.print("(");
Class[] paramTypes = isConstructor
? constr.getParameterTypes() : method.getParameterTypes();
int offset = (!isConstructor
&& Modifier.isStatic(method.getModifiers()))?0:1;
Type[] paramTypes = methodType.getParameterTypes();
int offset = methodType.isStatic()?0:1;
for (int i=0; i<paramTypes.length; i++) {
if (i>0)
writer.print(", ");
LocalInfo li;
if (code == null) {
li = new LocalInfo(i+offset);
li.setType(Type.tType(paramTypes[i]));
li.setType(paramTypes[i]);
} else
li = code.getParamInfo(i+offset);
writer.print(li.getType().toString()+" "+li.getName());
}
writer.print(")");
}
Class[] exceptions = isConstructor
? constr.getExceptionTypes() : method.getExceptionTypes();
if (exceptions != null && exceptions.length > 0) {
if (exceptions.length > 0) {
writer.println("");
writer.print("throws ");
for (int i= 0; i< exceptions.length; i++) {
if (exceptions[i] != null) {
if (i > 0)
writer.print(", ");
writer.print(env.classString(exceptions[i]));
}
writer.print(exceptions[i].toString());
}
}
if (code != null) {

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