76 lines
1.8 KiB
Java
76 lines
1.8 KiB
Java
package com.ibm.wala.cast.java.ssa;
|
|
|
|
import java.util.Collection;
|
|
import java.util.Collections;
|
|
|
|
import com.ibm.wala.ssa.SSAInstruction;
|
|
import com.ibm.wala.ssa.SSAInstructionFactory;
|
|
import com.ibm.wala.ssa.SymbolTable;
|
|
import com.ibm.wala.types.TypeReference;
|
|
|
|
/**
|
|
* The CAst source language front end for Java has explicit support for lexically-enclosing objects, rather than compiling them
|
|
* away into extra fields and access-control thwarting accessor methods as is done in bytecode. This instruction represents a read
|
|
* of the object of the given type that lexically encloses its use value.
|
|
*
|
|
* @author Julian Dolby (dolby@us.ibm.com)
|
|
*/
|
|
public class EnclosingObjectReference extends SSAInstruction {
|
|
private final TypeReference type;
|
|
|
|
private final int lval;
|
|
|
|
public EnclosingObjectReference(int iindex, int lval, TypeReference type) {
|
|
super(iindex);
|
|
this.lval = lval;
|
|
this.type = type;
|
|
}
|
|
|
|
public boolean hasDef() {
|
|
return true;
|
|
}
|
|
|
|
public int getDef() {
|
|
return lval;
|
|
}
|
|
|
|
public int getDef(int i) {
|
|
assert i == 0;
|
|
|
|
return lval;
|
|
}
|
|
|
|
public int getNumberOfDefs() {
|
|
return 1;
|
|
}
|
|
|
|
public TypeReference getEnclosingType() {
|
|
return type;
|
|
}
|
|
|
|
public SSAInstruction copyForSSA(SSAInstructionFactory insts, int[] defs, int[] uses) {
|
|
return ((AstJavaInstructionFactory) insts).EnclosingObjectReference(iindex, defs == null ? lval : defs[0], type);
|
|
}
|
|
|
|
public String toString(SymbolTable symbolTable) {
|
|
return getValueString(symbolTable, lval) + " = enclosing " + type.getName();
|
|
}
|
|
|
|
public void visit(IVisitor v) {
|
|
((AstJavaInstructionVisitor) v).visitEnclosingObjectReference(this);
|
|
}
|
|
|
|
public int hashCode() {
|
|
return lval * type.hashCode();
|
|
}
|
|
|
|
public Collection<TypeReference> getExceptionTypes() {
|
|
return Collections.emptySet();
|
|
}
|
|
|
|
public boolean isFallThrough() {
|
|
return true;
|
|
}
|
|
|
|
}
|