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CodeAnalyzer merged into MethodAnalyzer

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hintTypes, e.g. indexOf takes an int, but should be char
insert necessary widening casts for overloaded methods


git-svn-id: https://svn.code.sf.net/p/jode/code/trunk@891 379699f6-c40d-0410-875b-85095c16579e
stable
jochen 25 years ago
parent 1bd764b48c
commit 6a1af4e3ed
1 changed files with 273 additions and 51 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 324
      jode/jode/expr/InvokeOperator.java

324
jode/jode/expr/InvokeOperator.java
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@ -21,7 +21,7 @@ package jode.expr;
import java.lang.reflect.Modifier;
import jode.Decompiler;
import jode.decompiler.CodeAnalyzer;
import jode.decompiler.MethodAnalyzer;
import jode.decompiler.MethodAnalyzer;
import jode.decompiler.ClassAnalyzer;
import jode.decompiler.TabbedPrintWriter;
@ -29,31 +29,120 @@ import jode.GlobalOptions;
import jode.bytecode.*;
import jode.jvm.*;
import jode.type.*;
import java.lang.reflect.InvocationTargetException;
import jode.decompiler.Scope;
import java.lang.reflect.InvocationTargetException;
import java.util.Hashtable;
public final class InvokeOperator extends Operator
implements MatchableOperator {
CodeAnalyzer codeAnalyzer;
MethodAnalyzer methodAnalyzer;
boolean staticFlag;
boolean specialFlag;
MethodType methodType;
String methodName;
Type classType;
Type[] hints;
private final static Hashtable hintTypes = new Hashtable();
static {
/* Fill the hint type hashtable. For example, the first
* parameter of String.indexOf should be hinted as char, even
* though the formal parameter is an int.
* First hint is hint of return value (even if void)
* other hints are that of the parameters in order
*/
Type tCharHint = new IntegerType(IntegerType.IT_I, IntegerType.IT_C);
Type[] hintC = new Type[] { tCharHint };
Type[] hint0C = new Type[] { null, tCharHint };
Type[] hint0C0 = new Type[] { null, tCharHint, null };
hintTypes.put(Reference.getReference
("Ljava/lang/String;", "indexOf", "(I)I"),
hint0C);
hintTypes.put(Reference.getReference
("Ljava/lang/String;", "indexOf", "(II)I"),
hint0C0);
hintTypes.put(Reference.getReference
("Ljava/lang/String;", "lastIndexOf", "(I)I"),
hint0C);
hintTypes.put(Reference.getReference
("Ljava/lang/String;", "lastIndexOf", "(II)I"),
hint0C0);
hintTypes.put(Reference.getReference
("Ljava/io/Writer;", "write", "(I)V"),
hint0C);
hintTypes.put(Reference.getReference
("Ljava/io/BufferedWriter;", "write", "(I)V"),
hint0C);
hintTypes.put(Reference.getReference
("Ljava/io/CharArrayWriter;", "write", "(I)V"),
hint0C);
hintTypes.put(Reference.getReference
("Ljava/io/FilterWriter;", "write", "(I)V"),
hint0C);
hintTypes.put(Reference.getReference
("Ljava/io/OutputStreamWriter;", "write", "(I)V"),
hint0C);
hintTypes.put(Reference.getReference
("Ljava/io/PipedWriter;", "write", "(I)V"),
hint0C);
hintTypes.put(Reference.getReference
("Ljava/io/PrintWriter;", "write", "(I)V"),
hint0C);
hintTypes.put(Reference.getReference
("Ljava/io/StringWriter;", "write", "(I)V"),
hint0C);
hintTypes.put(Reference.getReference
("Ljava/io/PushbackReader;", "unread", "(I)V"),
hint0C);
hintTypes.put(Reference.getReference
("Ljava/lang/Reader;", "read", "()I"),
hintC);
hintTypes.put(Reference.getReference
("Ljava/lang/BufferedReader;", "read", "()I"),
hintC);
hintTypes.put(Reference.getReference
("Ljava/lang/CharArrayReader;", "read", "()I"),
hintC);
hintTypes.put(Reference.getReference
("Ljava/lang/FilterReader;", "read", "()I"),
hintC);
hintTypes.put(Reference.getReference
("Ljava/lang/InputStreamReader;", "read", "()I"),
hintC);
hintTypes.put(Reference.getReference
("Ljava/lang/LineNumberReader;", "read", "()I"),
hintC);
hintTypes.put(Reference.getReference
("Ljava/lang/PipedReader;", "read", "()I"),
hintC);
hintTypes.put(Reference.getReference
("Ljava/lang/PushBackReader;", "read", "()I"),
hintC);
hintTypes.put(Reference.getReference
("Ljava/lang/StringReader;", "read", "()I"),
hintC);
}
public InvokeOperator(CodeAnalyzer codeAnalyzer,
public InvokeOperator(MethodAnalyzer methodAnalyzer,
boolean staticFlag, boolean specialFlag,
Reference reference) {
super(Type.tUnknown, 0);
this.methodType = Type.tMethod(reference.getType());
this.methodName = reference.getName();
this.classType = Type.tType(reference.getClazz());
this.type = methodType.getReturnType();
this.codeAnalyzer = codeAnalyzer;
this.hints = (Type[]) hintTypes.get(reference);
if (hints != null && hints[0] != null)
this.type = hints[0];
else
this.type = methodType.getReturnType();
this.methodAnalyzer = methodAnalyzer;
this.staticFlag = staticFlag;
this.specialFlag = specialFlag;
if (staticFlag)
codeAnalyzer.useType(classType);
methodAnalyzer.useType(classType);
initOperands((staticFlag ? 0 : 1)
+ methodType.getParameterTypes().length);
}
@ -84,9 +173,13 @@ public final class InvokeOperator extends Operator
subExpressions[offset++].setType(Type.tSubType(getClassType()));
}
Type[] paramTypes = methodType.getParameterTypes();
for (int i=0; i < paramTypes.length; i++)
subExpressions[offset++].setType(Type.tSubType(paramTypes[i]));
for (int i=0; i < paramTypes.length; i++) {
Type pType = (hints != null && hints[i+1] != null)
? hints[i+1] : paramTypes[i];
subExpressions[offset++].setType(Type.tSubType(pType));
}
}
public void updateType() {
}
@ -106,13 +199,12 @@ public final class InvokeOperator extends Operator
* allow super class
*/
public boolean isThis() {
return getClassInfo() == codeAnalyzer.getClazz();
return getClassInfo() == methodAnalyzer.getClazz();
}
public InnerClassInfo getOuterClassInfo() {
ClassInfo clazz = getClassInfo();
if (clazz != null) {
InnerClassInfo[] outers = clazz.getOuterClasses();
public InnerClassInfo getOuterClassInfo(ClassInfo ci) {
if (ci != null) {
InnerClassInfo[] outers = ci.getOuterClasses();
if (outers != null)
return outers[0];
}
@ -126,15 +218,15 @@ public final class InvokeOperator extends Operator
public boolean isOuter() {
if (classType instanceof ClassInterfacesType) {
ClassInfo clazz = ((ClassInterfacesType) classType).getClassInfo();
ClassAnalyzer ana = codeAnalyzer.getClassAnalyzer();
ClassAnalyzer ana = methodAnalyzer.getClassAnalyzer();
while (true) {
if (clazz == ana.getClazz())
return true;
if (ana.getParent() == null)
break;
if (ana.getParent() instanceof CodeAnalyzer
if (ana.getParent() instanceof MethodAnalyzer
&& (Decompiler.options & Decompiler.OPTION_ANON) != 0)
ana = ((CodeAnalyzer) ana.getParent())
ana = ((MethodAnalyzer) ana.getParent())
.getClassAnalyzer();
else if (ana.getParent() instanceof ClassAnalyzer
&& (Decompiler.options
@ -150,7 +242,7 @@ public final class InvokeOperator extends Operator
public MethodAnalyzer getMethodAnalyzer() {
if (classType instanceof ClassInterfacesType) {
ClassAnalyzer ana = codeAnalyzer.getClassAnalyzer();
ClassAnalyzer ana = methodAnalyzer.getClassAnalyzer();
while (true) {
if (((ClassInterfacesType) classType).getClassInfo()
== ana.getClazz()) {
@ -158,8 +250,8 @@ public final class InvokeOperator extends Operator
}
if (ana.getParent() == null)
return null;
if (ana.getParent() instanceof CodeAnalyzer)
ana = ((CodeAnalyzer) ana.getParent())
if (ana.getParent() instanceof MethodAnalyzer)
ana = ((MethodAnalyzer) ana.getParent())
.getClassAnalyzer();
else if (ana.getParent() instanceof ClassAnalyzer)
ana = (ClassAnalyzer) ana.getParent();
@ -177,7 +269,7 @@ public final class InvokeOperator extends Operator
public boolean isSuperOrThis() {
if (classType instanceof ClassInterfacesType) {
return ((ClassInterfacesType) classType).getClassInfo()
.superClassOf(codeAnalyzer.getClazz());
.superClassOf(methodAnalyzer.getClazz());
}
return false;
}
@ -210,10 +302,10 @@ public final class InvokeOperator extends Operator
Object cls, Object[] params)
throws InterpreterException, InvocationTargetException {
if (ref.getClazz().equals
("L"+codeAnalyzer.getClazz().getName().replace('.','/')+";")) {
("L"+methodAnalyzer.getClazz().getName().replace('.','/')+";")) {
MethodType mt = (MethodType) Type.tType(ref.getType());
BytecodeInfo info = codeAnalyzer.getClassAnalyzer()
.getMethod(ref.getName(), mt).getCode().getBytecodeInfo();
BytecodeInfo info = methodAnalyzer.getClassAnalyzer()
.getMethod(ref.getName(), mt).getBytecodeInfo();
Value[] locals = new Value[info.getMaxLocals()];
for (int i=0; i< locals.length; i++)
locals[i] = new Value();
@ -232,12 +324,12 @@ public final class InvokeOperator extends Operator
}
public ConstOperator deobfuscateString(ConstOperator op) {
ClassAnalyzer clazz = codeAnalyzer.getClassAnalyzer();
CodeAnalyzer ca = clazz.getMethod(methodName, methodType).getCode();
if (ca == null)
ClassAnalyzer clazz = methodAnalyzer.getClassAnalyzer();
MethodAnalyzer ma = clazz.getMethod(methodName, methodType);
if (ma == null)
return null;
Environment env = new Environment();
BytecodeInfo info = ca.getBytecodeInfo();
BytecodeInfo info = ma.getBytecodeInfo();
Value[] locals = new Value[info.getMaxLocals()];
for (int i=0; i< locals.length; i++)
locals[i] = new Value();
@ -265,23 +357,33 @@ public final class InvokeOperator extends Operator
&& getMethodName().equals("append")
&& getMethodType().getParameterTypes().length == 1) {
Expression e = subExpressions[0].simplifyStringBuffer();
if (e == null)
Expression firstOp = subExpressions[0].simplifyStringBuffer();
if (firstOp == null)
return null;
subExpressions[1] = subExpressions[1].simplifyString();
if (e == EMPTYSTRING
if (firstOp == EMPTYSTRING
&& subExpressions[1].getType().isOfType(Type.tString))
return subExpressions[1];
if (e instanceof StringAddOperator
&& ((Operator)e).getSubExpressions()[0] == EMPTYSTRING)
e = ((Operator)e).getSubExpressions()[1];
if (firstOp instanceof StringAddOperator
&& ((Operator)firstOp).getSubExpressions()[0] == EMPTYSTRING)
firstOp = ((Operator)firstOp).getSubExpressions()[1];
Expression secondOp = subExpressions[1];
Type[] paramTypes = new Type[] {
Type.tStringBuffer, secondOp.getType().getCanonic()
};
if (needsCast(1, paramTypes)) {
Type castType = methodType.getParameterTypes()[0];
Operator castOp = new ConvertOperator(castType, castType);
castOp.addOperand(secondOp);
secondOp = castOp;
}
Operator result = new StringAddOperator();
result.addOperand(subExpressions[1]);
result.addOperand(e);
result.addOperand(secondOp);
result.addOperand(firstOp);
return result;
}
return null;
@ -347,29 +449,29 @@ public final class InvokeOperator extends Operator
Operator op = null;
switch (synth.getKind()) {
case SyntheticAnalyzer.ACCESSGETFIELD:
op = new GetFieldOperator(codeAnalyzer, false,
op = new GetFieldOperator(methodAnalyzer, false,
synth.getReference());
break;
case SyntheticAnalyzer.ACCESSGETSTATIC:
op = new GetFieldOperator(codeAnalyzer, true,
op = new GetFieldOperator(methodAnalyzer, true,
synth.getReference());
break;
case SyntheticAnalyzer.ACCESSPUTFIELD:
op = new StoreInstruction
(new PutFieldOperator(codeAnalyzer, false,
(new PutFieldOperator(methodAnalyzer, false,
synth.getReference()));
break;
case SyntheticAnalyzer.ACCESSPUTSTATIC:
op = new StoreInstruction
(new PutFieldOperator(codeAnalyzer, true,
(new PutFieldOperator(methodAnalyzer, true,
synth.getReference()));
break;
case SyntheticAnalyzer.ACCESSMETHOD:
op = new InvokeOperator(codeAnalyzer, false,
op = new InvokeOperator(methodAnalyzer, false,
false, synth.getReference());
break;
case SyntheticAnalyzer.ACCESSSTATICMETHOD:
op = new InvokeOperator(codeAnalyzer, true,
op = new InvokeOperator(methodAnalyzer, true,
false, synth.getReference());
break;
}
@ -386,6 +488,64 @@ public final class InvokeOperator extends Operator
return null;
}
public boolean needsCast(int param, Type[] paramTypes) {
Type realClassType;
if (staticFlag)
realClassType = classType;
else {
if (param == 0)
return paramTypes[0] instanceof NullType;
realClassType = paramTypes[0];
}
if (!(realClassType instanceof ClassInterfacesType)) {
/* Arrays don't have overloaded methods, all okay */
return false;
}
ClassInfo clazz = ((ClassInterfacesType) realClassType).getClassInfo();
int offset = staticFlag ? 0 : 1;
Type[] myParamTypes = methodType.getParameterTypes();
if (myParamTypes[param-offset].equals(paramTypes[param])) {
/* Type at param is okay. */
return false;
}
/* Now check if there is a conflicting method in this class or
* a superclass. */
while (clazz != null) {
MethodInfo[] methods = clazz.getMethods();
next_method:
for (int i=0; i< methods.length; i++) {
if (!methods[i].getName().equals(methodName))
/* method name doesn't match*/
continue next_method;
Type[] otherParamTypes
= Type.tMethod(methods[i].getType()).getParameterTypes();
if (otherParamTypes.length != myParamTypes.length) {
/* parameter count doesn't match*/
continue next_method;
}
if (myParamTypes[param-offset].isOfType
(Type.tSubType(otherParamTypes[param-offset]))) {
/* cast to myParamTypes cannot resolve any conflicts. */
continue next_method;
}
for (int p = offset; p < paramTypes.length; p++) {
if (!paramTypes[p]
.isOfType(Type.tSubType(otherParamTypes[p-offset])))
/* No conflict here */
continue next_method;
}
/* There is a conflict that can be resolved by a cast. */
return true;
}
clazz = clazz.getSuperclass();
}
return false;
}
public Expression simplify() {
Expression expr = simplifyAccess();
if (expr != null)
@ -406,15 +566,65 @@ public final class InvokeOperator extends Operator
boolean opIsThis = !staticFlag
&& subExpressions[0] instanceof ThisOperator;
int arg = 1;
int length = subExpressions.length;
ClassInfo clazz = getClassInfo();
InnerClassInfo outer = getOuterClassInfo(clazz);
Type[] paramTypes = new Type[subExpressions.length];
for (int i=0; i< subExpressions.length; i++)
paramTypes[i] = subExpressions[i].getType().getCanonic();
if (isConstructor()) {
InnerClassInfo outer = getOuterClassInfo();
boolean jikesAnonymousInner = false;
if ((Decompiler.options &
(Decompiler.OPTION_ANON | Decompiler.OPTION_CONTRAFO)) != 0
&& outer != null
&& (outer.outer == null || outer.name == null)) {
ClassAnalyzer anonymousClass = methodAnalyzer.getClassAnalyzer(clazz);
jikesAnonymousInner = anonymousClass.isJikesAnonymousInner();
if (outer.name == null) {
writer.print("SUPER IS ANONYMOUS?");
outer = null;
}
/* XXX check outerValues */
arg += anonymousClass.getOuterValues().length;
}
if (outer != null && outer.outer != null && outer.name != null
&& !Modifier.isStatic(outer.modifiers)
&& (Decompiler.options & Decompiler.OPTION_INNER) != 0) {
Expression outerInstance = subExpressions[arg++];
if (!(outerInstance instanceof ThisOperator)) {
outerInstance.dumpExpression(writer, 0);
Expression outerExpr = jikesAnonymousInner
? subExpressions[--length]
: subExpressions[arg++];
if (outerExpr instanceof CheckNullOperator) {
CheckNullOperator cno = (CheckNullOperator) outerExpr;
outerExpr = cno.subExpressions[0];
} else if (!(outerExpr instanceof ThisOperator)) {
if (!jikesAnonymousInner)
// Bug in jikes: it doesn't do a check null.
// We don't complain here.
writer.print("MISSING CHECKNULL ");
}
if (outerExpr instanceof ThisOperator) {
Scope scope = writer.getScope
(((ThisOperator) outerExpr).getClassInfo(),
Scope.CLASSSCOPE);
if (writer.conflicts(outer.name, scope, Scope.CLASSNAME)) {
outerExpr.dumpExpression(writer, 950);
writer.print(".");
}
} else {
if (outerExpr.getType() instanceof NullType) {
writer.print("((");
writer.printType(Type.tClass
(ClassInfo.forName(outer.outer)));
writer.print(") ");
outerExpr.dumpExpression(writer, 700);
writer.print(")");
} else
outerExpr.dumpExpression(writer, 950);
writer.print(".");
}
}
@ -422,7 +632,7 @@ public final class InvokeOperator extends Operator
if (specialFlag) {
if (opIsThis
&& (((ThisOperator)subExpressions[0]).getClassInfo()
== codeAnalyzer.getClazz())) {
== methodAnalyzer.getClazz())) {
if (isThis()) {
/* XXX check if this is a private or final method. */
} else {
@ -438,6 +648,7 @@ public final class InvokeOperator extends Operator
writer.print("(NON VIRTUAL ");
writer.printType(classType);
writer.print(")");
paramTypes[0] = classType;
minPriority = 700;
}
subExpressions[0].dumpExpression(writer, minPriority);
@ -468,12 +679,13 @@ public final class InvokeOperator extends Operator
writer.print("this.");
}
} else {
if (subExpressions[0].getType() instanceof NullType) {
if (needsCast(0, paramTypes)){
writer.print("((");
writer.printType(classType);
writer.print(") ");
subExpressions[0].dumpExpression(writer, 700);
writer.print(")");
paramTypes[0] = classType;
} else
subExpressions[0].dumpExpression(writer, 950);
}
@ -489,12 +701,22 @@ public final class InvokeOperator extends Operator
}
writer.print("(");
boolean first = true;
while (arg < subExpressions.length) {
int offset = staticFlag ? 0 : 1;
while (arg < length) {
if (!first)
writer.print(", ");
else
first = false;
subExpressions[arg++].dumpExpression(writer, 0);
int priority = 0;
if (needsCast(arg, paramTypes)) {
Type castType = methodType.getParameterTypes()[arg-offset];
writer.print("(");
writer.printType(castType);
writer.print(")");
paramTypes[arg] = castType;
priority = 700;
}
subExpressions[arg++].dumpExpression(writer, priority);
}
writer.print(")");
}

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