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/* Soot - a J*va Optimization Framework
* Copyright (C) 2003 Ondrej Lhotak
*
* This library 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 library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
package soot.jimple;
import soot.*;
public abstract class PointerStmtSwitch extends AbstractStmtSwitch {
Stmt statement;
/** A statement of the form l = constant; */
protected abstract void caseAssignConstStmt( Value dest, Constant c );
/** A statement of the form l = v; */
protected abstract void caseCopyStmt( Local dest, Local src );
/** A statement of the form l = (cl) v; */
protected void caseCastStmt( Local dest, Local src, CastExpr c ) {
// default is to just ignore the cast
caseCopyStmt( dest, src );
}
/** An identity statement assigning a parameter to a local. */
protected abstract void caseIdentityStmt( Local dest, IdentityRef src );
/** A statement of the form l1 = l2.f; */
protected abstract void caseLoadStmt( Local dest, InstanceFieldRef src );
/** A statement of the form l1.f = l2; */
protected abstract void caseStoreStmt( InstanceFieldRef dest, Local src );
/** A statement of the form l1 = l2[i]; */
protected abstract void caseArrayLoadStmt( Local dest, ArrayRef src );
/** A statement of the form l1[i] = l2; */
protected abstract void caseArrayStoreStmt( ArrayRef dest, Local src );
/** A statement of the form l = cl.f; */
protected abstract void caseGlobalLoadStmt( Local dest, StaticFieldRef src );
/** A statement of the form cl.f = l; */
protected abstract void caseGlobalStoreStmt( StaticFieldRef dest, Local src );
/** A return statement. e is null if a non-reference type is returned. */
protected abstract void caseReturnStmt( Local val );
/** A return statement returning a constant. */
protected void caseReturnConstStmt( Constant val ) {
// default is uninteresting
caseUninterestingStmt( statement );
}
/** Any type of new statement (NewStmt, NewArrayStmt, NewMultiArrayStmt) */
protected abstract void caseAnyNewStmt( Local dest, Expr e );
/** A new statement */
protected void caseNewStmt( Local dest, NewExpr e ) {
caseAnyNewStmt( dest, e );
}
/** A newarray statement */
protected void caseNewArrayStmt( Local dest, NewArrayExpr e ) {
caseAnyNewStmt( dest, e );
}
/** A anewarray statement */
protected void caseNewMultiArrayStmt( Local dest, NewMultiArrayExpr e ) {
caseAnyNewStmt( dest, e );
}
/** A method invocation. dest is null if there is no reference type return value. */
protected abstract void caseInvokeStmt( Local dest, InvokeExpr e );
/** A throw statement */
protected void caseThrowStmt( Local thrownException ) {
caseUninterestingStmt(statement);
}
/** A catch statement */
protected void caseCatchStmt( Local dest, CaughtExceptionRef cer ) {
caseUninterestingStmt(statement);
}
/** Any other statement */
protected void caseUninterestingStmt( Stmt s ) {};
public final void caseAssignStmt( AssignStmt s ) {
statement = s;
Value lhs = s.getLeftOp();
Value rhs = s.getRightOp();
if( ! (lhs.getType() instanceof RefType)
&& ! (lhs.getType() instanceof ArrayType) ) {
if( rhs instanceof InvokeExpr ) {
caseInvokeStmt( null, (InvokeExpr) rhs );
return;
}
caseUninterestingStmt( s );
return;
}
if( rhs instanceof InvokeExpr ) {
caseInvokeStmt( (Local) lhs, (InvokeExpr) rhs );
return;
}
if( lhs instanceof Local ) {
if( rhs instanceof Local ) {
caseCopyStmt( (Local) lhs, (Local) rhs );
} else if( rhs instanceof InstanceFieldRef ) {
caseLoadStmt( (Local) lhs, (InstanceFieldRef) rhs );
} else if( rhs instanceof ArrayRef ) {
caseArrayLoadStmt( (Local) lhs, (ArrayRef) rhs );
} else if( rhs instanceof StaticFieldRef ) {
caseGlobalLoadStmt( (Local) lhs, (StaticFieldRef) rhs );
} else if( rhs instanceof NewExpr ) {
caseNewStmt( (Local) lhs, (NewExpr) rhs );
} else if( rhs instanceof NewArrayExpr ) {
caseNewArrayStmt( (Local) lhs, (NewArrayExpr) rhs );
} else if( rhs instanceof NewMultiArrayExpr ) {
caseNewMultiArrayStmt( (Local) lhs, (NewMultiArrayExpr) rhs );
} else if( rhs instanceof CastExpr ) {
CastExpr r = (CastExpr) rhs;
Value rv = r.getOp();
if( rv instanceof Constant ) {
caseAssignConstStmt( lhs, (Constant) rv );
} else {
caseCastStmt( (Local) lhs, (Local) rv, r );
}
} else if( rhs instanceof Constant ) {
caseAssignConstStmt( lhs, (Constant) rhs );
} else throw new RuntimeException( "unhandled stmt "+s );
} else if( lhs instanceof InstanceFieldRef ) {
if( rhs instanceof Local ) {
caseStoreStmt( (InstanceFieldRef) lhs, (Local) rhs );
} else if( rhs instanceof Constant ) {
caseAssignConstStmt( lhs, (Constant) rhs );
} else throw new RuntimeException( "unhandled stmt "+s );
} else if( lhs instanceof ArrayRef ) {
if( rhs instanceof Local ) {
caseArrayStoreStmt( (ArrayRef) lhs, (Local) rhs );
} else if( rhs instanceof Constant ) {
caseAssignConstStmt( lhs, (Constant) rhs );
} else throw new RuntimeException( "unhandled stmt "+s );
} else if( lhs instanceof StaticFieldRef ) {
if( rhs instanceof Local ) {
caseGlobalStoreStmt( (StaticFieldRef) lhs, (Local) rhs );
} else if( rhs instanceof Constant ) {
caseAssignConstStmt( lhs, (Constant) rhs );
} else throw new RuntimeException( "unhandled stmt "+s );
} else if( rhs instanceof Constant ) {
caseAssignConstStmt( lhs, (Constant) rhs );
} else throw new RuntimeException( "unhandled stmt "+s );
}
public final void caseReturnStmt(ReturnStmt s) {
statement = s;
Value op = s.getOp();
if( op.getType() instanceof RefType
|| op.getType() instanceof ArrayType ) {
if( op instanceof Constant ) {
caseReturnConstStmt( (Constant) op );
} else {
caseReturnStmt( (Local) op );
}
} else {
caseReturnStmt( (Local) null );
}
}
public final void caseReturnVoidStmt(ReturnVoidStmt s) {
statement = s;
caseReturnStmt( (Local) null );
}
public final void caseInvokeStmt(InvokeStmt s) {
statement = s;
caseInvokeStmt( null, s.getInvokeExpr() );
}
public final void caseIdentityStmt(IdentityStmt s) {
statement = s;
Value lhs = s.getLeftOp();
Value rhs = s.getRightOp();
if( !( lhs.getType() instanceof RefType )
&& !(lhs.getType() instanceof ArrayType ) ) {
caseUninterestingStmt( s );
return;
}
Local llhs = (Local) lhs;
if( rhs instanceof CaughtExceptionRef ) {
caseCatchStmt( llhs, (CaughtExceptionRef) rhs );
} else {
IdentityRef rrhs = (IdentityRef) rhs;
caseIdentityStmt( llhs, rrhs );
}
}
public final void caseThrowStmt( ThrowStmt s) {
statement = s;
caseThrowStmt( (Local) s.getOp() );
}
}
