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A Java Optimization Framework
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package soot.dexpler.instructions;
/*-
* #%L
* Soot - a J*va Optimization Framework
* %%
* Copyright (C) 2012 Michael Markert, Frank Hartmann
*
* (c) 2012 University of Luxembourg - Interdisciplinary Centre for
* Security Reliability and Trust (SnT) - All rights reserved
* Alexandre Bartel
*
* %%
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation, either version 2.1 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Lesser Public License for more details.
*
* You should have received a copy of the GNU General Lesser Public
* License along with this program. If not, see
* .
* #L%
*/
import static soot.dexpler.Util.dottedClassName;
import static soot.dexpler.Util.isFloatLike;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import org.jf.dexlib2.iface.instruction.Instruction;
import org.jf.dexlib2.iface.instruction.ReferenceInstruction;
import org.jf.dexlib2.iface.instruction.formats.Instruction35c;
import org.jf.dexlib2.iface.instruction.formats.Instruction3rc;
import org.jf.dexlib2.iface.instruction.formats.Instruction45cc;
import org.jf.dexlib2.iface.instruction.formats.Instruction4rcc;
import org.jf.dexlib2.iface.reference.FieldReference;
import org.jf.dexlib2.iface.reference.MethodReference;
import soot.Local;
import soot.Modifier;
import soot.RefType;
import soot.Scene;
import soot.SootClass;
import soot.SootFieldRef;
import soot.SootMethodRef;
import soot.SootResolver;
import soot.Type;
import soot.dexpler.DexBody;
import soot.dexpler.DexType;
import soot.dexpler.IDalvikTyper;
import soot.dexpler.typing.DalvikTyper;
import soot.jimple.AssignStmt;
import soot.jimple.InstanceInvokeExpr;
import soot.jimple.InvokeExpr;
import soot.jimple.InvokeStmt;
import soot.jimple.Jimple;
import soot.jimple.MethodHandle.Kind;
public abstract class MethodInvocationInstruction extends DexlibAbstractInstruction implements DanglingInstruction {
// stores the dangling InvokeExpr
protected InvokeExpr invocation;
protected AssignStmt assign = null;
public MethodInvocationInstruction(Instruction instruction, int codeAddress) {
super(instruction, codeAddress);
}
@Override
public void finalize(DexBody body, DexlibAbstractInstruction successor) {
// defer final jimplification to move result
if (successor instanceof MoveResultInstruction) {
// MoveResultInstruction i = (MoveResultInstruction)successor;
// i.setExpr(invocation);
// if (lineNumber != -1)
// i.setTag(new SourceLineNumberTag(lineNumber));
assign = Jimple.v().newAssignStmt(body.getStoreResultLocal(), invocation);
setUnit(assign);
addTags(assign);
body.add(assign);
unit = assign;
// this is a invoke statement (the MoveResult had to be the direct successor for an expression)
} else {
InvokeStmt invoke = Jimple.v().newInvokeStmt(invocation);
setUnit(invoke);
addTags(invoke);
body.add(invoke);
unit = invoke;
}
if (IDalvikTyper.ENABLE_DVKTYPER) {
// Debug.printDbg(IDalvikTyper.DEBUG, "constraint special invoke: "+ assign);
if (invocation instanceof InstanceInvokeExpr) {
Type t = invocation.getMethodRef().getDeclaringClass().getType();
DalvikTyper.v().setType(((InstanceInvokeExpr) invocation).getBaseBox(), t, true);
// DalvikTyper.v().setObjectType(assign.getLeftOpBox());
}
int i = 0;
for (Type pt : invocation.getMethodRef().getParameterTypes()) {
DalvikTyper.v().setType(invocation.getArgBox(i++), pt, true);
}
if (assign != null) {
DalvikTyper.v().setType(assign.getLeftOpBox(), invocation.getType(), false);
}
}
}
@Override
public Set introducedTypes() {
Set types = new HashSet();
MethodReference method = (MethodReference) (((ReferenceInstruction) instruction).getReference());
types.add(DexType.toSoot(method.getDefiningClass()));
types.add(DexType.toSoot(method.getReturnType()));
List paramTypes = method.getParameterTypes();
if (paramTypes != null) {
for (CharSequence type : paramTypes) {
types.add(DexType.toSoot(type.toString()));
}
}
return types;
}
// overriden in InvokeStaticInstruction
@Override
boolean isUsedAsFloatingPoint(DexBody body, int register) {
return isUsedAsFloatingPoint(body, register, false);
}
/**
* Determine if register is used as floating point.
*
* Abstraction for static and non-static methods. Non-static methods need to ignore the first parameter (this)
*
* @param isStatic
* if this method is static
*/
protected boolean isUsedAsFloatingPoint(DexBody body, int register, boolean isStatic) {
MethodReference item = (MethodReference) ((ReferenceInstruction) instruction).getReference();
List paramTypes = item.getParameterTypes();
List regs = getUsedRegistersNums();
if (paramTypes == null) {
return false;
}
for (int i = 0, j = 0; i < regs.size(); i++, j++) {
if (!isStatic && i == 0) {
j--;
continue;
}
if (regs.get(i) == register && isFloatLike(DexType.toSoot(paramTypes.get(j).toString()))) {
return true;
}
if (DexType.isWide(paramTypes.get(j).toString())) {
i++;
}
}
return false;
}
/**
* Determine if register is used as object.
*
* Abstraction for static and non-static methods. Non-static methods need to ignore the first parameter (this)
*
* @param isStatic
* if this method is static
*/
protected boolean isUsedAsObject(DexBody body, int register, boolean isStatic) {
MethodReference item = (MethodReference) ((ReferenceInstruction) instruction).getReference();
List paramTypes = item.getParameterTypes();
List regs = getUsedRegistersNums();
if (paramTypes == null) {
return false;
}
// we call a method on the register
if (!isStatic && regs.get(0) == register) {
return true;
}
// we call a method with register as a reftype paramter
for (int i = 0, j = 0; i < regs.size(); i++, j++) {
if (!isStatic && i == 0) {
j--;
continue;
}
if (regs.get(i) == register && (DexType.toSoot(paramTypes.get(j).toString()) instanceof RefType)) {
return true;
}
if (DexType.isWide(paramTypes.get(j).toString())) {
i++;
}
}
return false;
}
/**
* Return the virtual SootMethodRef for the invoked method.
*
*/
protected SootMethodRef getVirtualSootMethodRef() {
return getNormalSootMethodRef(Kind.REF_INVOKE_VIRTUAL);
}
/**
* Return the static SootMethodRef for the invoked method.
*
*/
protected SootMethodRef getStaticSootMethodRef() {
return getNormalSootMethodRef(Kind.REF_INVOKE_STATIC);
}
/**
* Return the static SootMethodRef for the invoked method.
*
*/
protected SootMethodRef getInterfaceSootMethodRef() {
return getNormalSootMethodRef(Kind.REF_INVOKE_INTERFACE);
}
/**
* Return the SootMethodRef for the invoked method.
*
* @param kind
* The type of the invocation in terms of MethodHandle.Kind
*/
protected SootMethodRef getNormalSootMethodRef(Kind kind) {
return getSootMethodRef((MethodReference) ((ReferenceInstruction) instruction).getReference(), kind);
}
/**
* Return a SootMethodRef for the given MethodReference dependent on the InvocationType passed in.
*
* @param mItem
* The MethodReference included in the invoke instruction
* @param kind
* The type of the invocation in terms of MethodHandle.Kind
* @return A SootMethodRef
*/
protected SootMethodRef getSootMethodRef(MethodReference mItem, Kind kind) {
return getSootMethodRef(convertClassName(mItem.getDefiningClass(), kind), mItem.getName(), mItem.getReturnType(),
mItem.getParameterTypes(), kind);
}
/**
* Return a SootMethodRef for the given data.
*
* @param sc
* The SootClass that the method is declared in
* @param name
* The name of the method being invoked
* @param returnType
* The return type of the method being invoked
* @param paramTypes
* The parameter types of the method being invoked
* @param kind
* The type of the invocation in terms of MethodHandle.Kind
* @return A SootMethodRef
*/
protected SootMethodRef getSootMethodRef(SootClass sc, String name, String returnType,
List paramTypes, Kind kind) {
return Scene.v().makeMethodRef(sc, name, convertParameterTypes(paramTypes), DexType.toSoot(returnType),
kind == Kind.REF_INVOKE_STATIC);
}
/**
* Return a SootFieldRef for the given data.
*
* @param mItem
* The FieldReference included in the invoke instruction
* @param kind
* The type of the field access in terms of MethodHandle.Kind
* @return A SootFieldRef
*/
protected SootFieldRef getSootFieldRef(FieldReference mItem, Kind kind) {
return getSootFieldRef(convertClassName(mItem.getDefiningClass(), kind), mItem.getName(), mItem.getType(), kind);
}
/**
* Return a SootFieldRef for the given data.
*
* @param sc
* The SootClass that the field is declared in
* @param name
* The name of the field
* @param type
* The type of the field
* @param kind
* The type of the field access in terms of MethodHandle.Kind
* @return A SootFieldRef
*/
protected SootFieldRef getSootFieldRef(SootClass sc, String name, String type, Kind kind) {
return Scene.v().makeFieldRef(sc, name, DexType.toSoot(type),
kind == Kind.REF_GET_FIELD_STATIC || kind == Kind.REF_PUT_FIELD_STATIC);
}
/**
* Converts a list of dex string parameter types to soot types.
*
* @param paramTypes
* The dex parameter types
* @return The soot parameter types
*/
protected List convertParameterTypes(List paramTypes) {
List parameterTypes = new ArrayList();
if (paramTypes != null) {
for (CharSequence type : paramTypes) {
parameterTypes.add(DexType.toSoot(type.toString()));
}
}
return parameterTypes;
}
/**
* Converts a given string class name into a SootClass.
*
* @param name
* The dex string representation of the class
* @param kind
* The MethodHandle.Kind of the MethodHandle this class is coming from
* @return
*/
protected SootClass convertClassName(String name, Kind kind) {
if (name.startsWith("[")) {
name = "java.lang.Object";
} else {
name = dottedClassName(name);
}
SootClass sc = SootResolver.v().makeClassRef(name);
if (kind == Kind.REF_INVOKE_INTERFACE && sc.isPhantom()) {
sc.setModifiers(sc.getModifiers() | Modifier.INTERFACE);
}
return sc;
}
/**
* Build the local parameters of the invocation. If a method is not static then its first register value is the invoking
* object and will be skipped when constructing the local parameters.
*
* @param body
* the body to build for and into
* @param paramTypes
* the parameter types as strings
* @param isStatic
* if the method is static
* @return the converted parameters
*/
protected List buildParameters(DexBody body, List paramTypes, boolean isStatic) {
List parameters = new ArrayList();
List regs = getUsedRegistersNums();
// i: index for register
// j: index for parameter type
for (int i = 0, j = 0; i < regs.size(); i++, j++) {
parameters.add(body.getRegisterLocal(regs.get(i)));
// if method is non-static the first parameter is the instance
// pointer and has no corresponding parameter type
if (!isStatic && i == 0) {
j--;
continue;
}
// If current parameter is wide ignore the next register.
// No need to increment j as there is one parameter type
// for those two registers.
if (paramTypes != null && DexType.isWide(paramTypes.get(j).toString())) {
i++;
}
}
return parameters;
}
/**
* Return the indices used in this instruction.
*
* @return a list of register indices
*/
protected List getUsedRegistersNums() {
if (instruction instanceof Instruction35c) {
return getUsedRegistersNums((Instruction35c) instruction);
} else if (instruction instanceof Instruction3rc) {
return getUsedRegistersNums((Instruction3rc) instruction);
} else if (instruction instanceof Instruction45cc) {
return getUsedRegistersNums((Instruction45cc) instruction);
} else if (instruction instanceof Instruction4rcc) {
return getUsedRegistersNums((Instruction4rcc) instruction);
}
throw new RuntimeException("Instruction is neither a InvokeInstruction nor a InvokeRangeInstruction");
}
/**
* Executes the "jimplify" operation for a virtual invocation
*/
protected void jimplifyVirtual(DexBody body) {
// In some applications, InterfaceInvokes are disguised as VirtualInvokes.
// We fix this silently
SootMethodRef ref = getVirtualSootMethodRef();
if (ref.getDeclaringClass().isInterface()) {
jimplifyInterface(body);
return;
}
// This is actually a VirtualInvoke
MethodReference item = (MethodReference) ((ReferenceInstruction) instruction).getReference();
List parameters = buildParameters(body, item.getParameterTypes(), false);
invocation = Jimple.v().newVirtualInvokeExpr(parameters.get(0), ref, parameters.subList(1, parameters.size()));
body.setDanglingInstruction(this);
}
/**
* Executes the "jimplify" operation for an interface invocation
*/
protected void jimplifyInterface(DexBody body) {
// In some applications, VirtualInvokes are disguised as InterfaceInvokes.
// We fix this silently
SootMethodRef ref = getInterfaceSootMethodRef();
if (!ref.getDeclaringClass().isInterface()) {
jimplifyVirtual(body);
return;
}
MethodReference item = (MethodReference) ((ReferenceInstruction) instruction).getReference();
List parameters = buildParameters(body, item.getParameterTypes(), false);
invocation = Jimple.v().newInterfaceInvokeExpr(parameters.get(0), ref, parameters.subList(1, parameters.size()));
body.setDanglingInstruction(this);
}
/**
* Executes the "jimplify" operation for a special invocation
*/
protected void jimplifySpecial(DexBody body) {
MethodReference item = (MethodReference) ((ReferenceInstruction) instruction).getReference();
List parameters = buildParameters(body, item.getParameterTypes(), false);
invocation = Jimple.v().newSpecialInvokeExpr(parameters.get(0), getVirtualSootMethodRef(),
parameters.subList(1, parameters.size()));
body.setDanglingInstruction(this);
}
/**
* Executes the "jimplify" operation for a static invocation
*/
protected void jimplifyStatic(DexBody body) {
MethodReference item = (MethodReference) ((ReferenceInstruction) instruction).getReference();
invocation
= Jimple.v().newStaticInvokeExpr(getStaticSootMethodRef(), buildParameters(body, item.getParameterTypes(), true));
body.setDanglingInstruction(this);
}
}