Examples with ASTLabeledNode soot.dava.internal.AST.ASTLabeledNode used on opensource projects

Example 1 with ASTLabeledNode

use of soot.dava.internal.AST.ASTLabeledNode in project soot by Sable.

the class EliminateConditions method change.

public boolean change(Boolean returned, ASTNode temp) {
    if (bodyContainingNode != null && returned != null && temp != null) {
        int index = bodyContainingNode.indexOf(temp);
        if (DEBUG)
            System.out.println("in change");
        if (temp instanceof ASTIfNode) {
            bodyContainingNode.remove(temp);
            if (returned.booleanValue()) {
                // if statement and value was true put the body of if into
                // the code
                // if its a labeled stmt we need a labeled block instead
                // notice that its okkay to put a labeled block since other
                // transformations might remove it
                String label = ((ASTLabeledNode) temp).get_Label().toString();
                if (label != null) {
                    ASTLabeledBlockNode labeledNode = new ASTLabeledBlockNode(((ASTLabeledNode) temp).get_Label(), (List<Object>) temp.get_SubBodies().get(0));
                    bodyContainingNode.add(index, labeledNode);
                } else {
                    bodyContainingNode.addAll(index, (List) temp.get_SubBodies().get(0));
                }
            }
            if (DEBUG)
                System.out.println("Removed if" + temp);
            return true;
        } else if (temp instanceof ASTIfElseNode) {
            bodyContainingNode.remove(temp);
            if (returned.booleanValue()) {
                // true so the if branch's body has to be added
                // if its a labeled stmt we need a labeled block instead
                // notice that its okkay to put a labeled block since other
                // transformations might remove it
                String label = ((ASTLabeledNode) temp).get_Label().toString();
                if (label != null) {
                    ASTLabeledBlockNode labeledNode = new ASTLabeledBlockNode(((ASTLabeledNode) temp).get_Label(), (List<Object>) temp.get_SubBodies().get(0));
                    bodyContainingNode.add(index, labeledNode);
                } else {
                    bodyContainingNode.addAll(index, (List) temp.get_SubBodies().get(0));
                }
            } else {
                // if its a labeled stmt we need a labeled block instead
                // notice that its okkay to put a labeled block since other
                // transformations might remove it
                String label = ((ASTLabeledNode) temp).get_Label().toString();
                if (label != null) {
                    ASTLabeledBlockNode labeledNode = new ASTLabeledBlockNode(((ASTLabeledNode) temp).get_Label(), (List<Object>) temp.get_SubBodies().get(1));
                    bodyContainingNode.add(index, labeledNode);
                } else {
                    bodyContainingNode.addAll(index, (List) temp.get_SubBodies().get(1));
                }
            }
            return true;
        } else if (temp instanceof ASTWhileNode && returned.booleanValue() == false) {
            // notice we only remove if ASTWhileNode has false condition
            bodyContainingNode.remove(temp);
            return true;
        } else if (temp instanceof ASTDoWhileNode && returned.booleanValue() == false) {
            // System.out.println("in try dowhile false");
            // remove the loop copy the body out since it gets executed once
            bodyContainingNode.remove(temp);
            bodyContainingNode.addAll(index, (List) temp.get_SubBodies().get(0));
            return true;
        } else if (temp instanceof ASTForLoopNode && returned.booleanValue() == false) {
            bodyContainingNode.remove(temp);
            ASTStatementSequenceNode newNode = new ASTStatementSequenceNode(((ASTForLoopNode) temp).getInit());
            bodyContainingNode.add(index, newNode);
            return true;
        }
    }
    return false;
}

Example 2 with ASTLabeledNode

use of soot.dava.internal.AST.ASTLabeledNode in project soot by Sable.

the class UselessAbruptStmtRemover method caseASTStatementSequenceNode.

public void caseASTStatementSequenceNode(ASTStatementSequenceNode node) {
    Iterator<AugmentedStmt> it = node.getStatements().iterator();
    AugmentedStmt remove = null;
    ASTLabeledNode target = null;
    while (it.hasNext()) {
        AugmentedStmt as = it.next();
        Stmt s = as.get_Stmt();
        // we only care about break and continue stmts
        if (!(s instanceof DAbruptStmt)) {
            continue;
        }
        DAbruptStmt abrupt = (DAbruptStmt) s;
        String label = abrupt.getLabel().toString();
        if (label == null) {
            // analysis with implicit abrupt flow but not needed currently
            continue;
        }
        if (it.hasNext()) {
            // afterwards...that is for sure dead code
            throw new DecompilationException("Dead code detected. Report to developer");
        }
        // get the target node
        Object temp = mapper.getTarget(label);
        if (temp == null) {
            continue;
        // throw new DecompilationException("Could not find target for abrupt stmt"+abrupt.toString());
        }
        target = (ASTLabeledNode) temp;
        // will need to find parents of ancestors see if we need to initialize the finder
        if (finder == null) {
            finder = new ASTParentNodeFinder();
            methodNode.apply(finder);
        }
        if (DEBUG)
            System.out.println("Starting useless check for abrupt stmt: " + abrupt);
        // start condition is that ancestor is the stmt seq node
        ASTNode ancestor = node;
        while (ancestor != target) {
            Object tempParent = finder.getParentOf(ancestor);
            if (tempParent == null)
                throw new DecompilationException("Parent found was null!!. Report to Developer");
            ASTNode ancestorsParent = (ASTNode) tempParent;
            if (DEBUG)
                System.out.println("\tCurrent ancestorsParent has type" + ancestorsParent.getClass());
            // ancestor should be last child of ancestorsParent
            if (!checkChildLastInParent(ancestor, ancestorsParent)) {
                if (DEBUG)
                    System.out.println("\t\tCurrent ancestorParent has more children after this ancestor");
                // return from the method since this is the last stmt and we cant do anything
                return;
            }
            // ancestorsParent should not be a loop of any kind OR A SWITCH
            if (ancestorsParent instanceof ASTWhileNode || ancestorsParent instanceof ASTDoWhileNode || ancestorsParent instanceof ASTUnconditionalLoopNode || ancestorsParent instanceof ASTForLoopNode || ancestorsParent instanceof ASTSwitchNode) {
                if (DEBUG)
                    System.out.println("\t\tAncestorsParent is a loop shouldnt remove abrupt stmt");
                return;
            }
            ancestor = ancestorsParent;
        }
        if (DEBUG)
            System.out.println("\tGot to target without returning means we can remove stmt");
        remove = as;
    }
    if (remove != null) {
        List<AugmentedStmt> stmts = node.getStatements();
        stmts.remove(remove);
        if (DEBUG)
            System.out.println("\tRemoved abrupt stmt");
        if (target != null) {
            if (DEBUG)
                System.out.println("Invoking findAndKill on the target");
            UselessLabelFinder.v().findAndKill(target);
        }
        // TODO what if we just emptied a stmt seq block??
        // not doing this for the moment
        // set modified flag make finder null
        G.v().ASTTransformations_modified = true;
        finder = null;
    }
}