private IMethod makeNullaryNumberCall(IClass cls) {
JSInstructionFactory insts =
(JSInstructionFactory) cls.getClassLoader().getInstructionFactory();
MethodReference ref = AstMethodReference.fnReference(JavaScriptTypes.Number);
JavaScriptSummary S = new JavaScriptSummary(ref, 1);
S.addConstant(new Integer(2), new ConstantValue(0.0));
S.addStatement(insts.ReturnInstruction(2, false));
S.getNextProgramCounter();
return new JavaScriptConstructor(ref, S, cls);
}
private IMethod makeUnaryNumberCall(IClass cls) {
JSInstructionFactory insts =
(JSInstructionFactory) cls.getClassLoader().getInstructionFactory();
MethodReference ref = AstMethodReference.fnReference(JavaScriptTypes.Number);
JavaScriptSummary S = new JavaScriptSummary(ref, 2);
S.addStatement(insts.GetInstruction(4, 2, "toNumber"));
S.getNextProgramCounter();
CallSiteReference cs = new JSCallSiteReference(S.getNextProgramCounter());
S.addStatement(insts.Invoke(4, 5, new int[] {2}, 6, cs));
S.addStatement(insts.ReturnInstruction(5, false));
S.getNextProgramCounter();
return new JavaScriptConstructor(ref, S, cls);
}
protected void doCall(
WalkContext context,
CAstNode call,
int result,
int exception,
CAstNode name,
int receiver,
int[] arguments) {
MethodReference ref =
name.getValue().equals("ctor")
? JavaScriptMethods.ctorReference
: name.getValue().equals("dispatch")
? JavaScriptMethods.dispatchReference
: AstMethodReference.fnReference(JavaScriptTypes.CodeBody);
context
.cfg()
.addInstruction(
((JSInstructionFactory) insts)
.Invoke(
receiver,
result,
arguments,
exception,
new JSCallSiteReference(ref, context.cfg().getCurrentInstruction())));
context.cfg().addPreNode(call, context.getUnwindState());
// this new block is for the normal termination case
context.cfg().newBlock(true);
// exceptional case: flow to target given in CAst, or if null, the exit node
if (context.getControlFlow().getTarget(call, null) != null)
context.cfg().addPreEdge(call, context.getControlFlow().getTarget(call, null), true);
else context.cfg().addPreEdgeToExit(call, true);
}
public class LoadFileTargetSelector implements MethodTargetSelector {
private final MethodTargetSelector base;
private final JSSSAPropagationCallGraphBuilder builder;
private final TypeReference loadFileRef =
TypeReference.findOrCreate(
JavaScriptTypes.jsLoader, TypeName.string2TypeName("Lprologue.js/loadFile"));
private final MethodReference loadFileFunRef = AstMethodReference.fnReference(loadFileRef);
private final HashSet<URL> loadedFiles = HashSetFactory.make();
@Override
public IMethod getCalleeTarget(CGNode caller, CallSiteReference site, IClass receiver) {
IMethod target = base.getCalleeTarget(caller, site, receiver);
if (target != null && target.getReference().equals(loadFileFunRef)) {
Set<String> names = new HashSet<String>();
SSAInstruction call =
caller.getIR()
.getInstructions()[
caller.getIR().getCallInstructionIndices(site).intIterator().next()];
if (call.getNumberOfUses() > 1) {
LocalPointerKey fileNameV = new LocalPointerKey(caller, call.getUse(1));
OrdinalSet<InstanceKey> ptrs = builder.getPointerAnalysis().getPointsToSet(fileNameV);
for (InstanceKey k : ptrs) {
if (k instanceof ConstantKey) {
Object v = ((ConstantKey) k).getValue();
if (v instanceof String) {
names.add((String) v);
}
}
}
if (names.size() == 1) {
String str = names.iterator().next();
try {
JavaScriptLoader cl =
(JavaScriptLoader) builder.getClassHierarchy().getLoader(JavaScriptTypes.jsLoader);
URL url = new URL(builder.getBaseURL(), str);
if (!loadedFiles.contains(url)) {
// try to open the input stream for the URL. if it fails, we'll get an IOException
// and fall through to default case
InputStream inputStream = url.openConnection().getInputStream();
inputStream.close();
JSCallGraphUtil.loadAdditionalFile(builder.getClassHierarchy(), cl, url);
loadedFiles.add(url);
IClass script =
builder
.getClassHierarchy()
.lookupClass(
TypeReference.findOrCreate(cl.getReference(), "L" + url.getFile()));
return script.getMethod(JavaScriptMethods.fnSelector);
}
} catch (MalformedURLException e1) {
// do nothing, fall through and return 'target'
} catch (IOException e) {
// do nothing, fall through and return 'target'
} catch (RuntimeException e) {
// do nothing, fall through and return 'target'
}
}
}
}
return target;
}
public LoadFileTargetSelector(
MethodTargetSelector base, JSSSAPropagationCallGraphBuilder builder) {
super();
this.base = base;
this.builder = builder;
}
}
