use of soot.EquivalentValue in project soot by Sable.
the class BusyCodeMotion method internalTransform.
/**
* performs the busy code motion.
*/
protected void internalTransform(Body b, String phaseName, Map<String, String> opts) {
BCMOptions options = new BCMOptions(opts);
HashMap<EquivalentValue, Local> expToHelper = new HashMap<EquivalentValue, Local>();
Chain<Unit> unitChain = b.getUnits();
if (Options.v().verbose())
logger.debug("[" + b.getMethod().getName() + "] performing Busy Code Motion...");
CriticalEdgeRemover.v().transform(b, phaseName + ".cer");
UnitGraph graph = new BriefUnitGraph(b);
/* map each unit to its RHS. only take binary expressions */
Map<Unit, EquivalentValue> unitToEquivRhs = new UnitMap<EquivalentValue>(b, graph.size() + 1, 0.7f) {
protected EquivalentValue mapTo(Unit unit) {
Value tmp = SootFilter.noInvokeRhs(unit);
Value tmp2 = SootFilter.binop(tmp);
if (tmp2 == null)
tmp2 = SootFilter.concreteRef(tmp);
return SootFilter.equiVal(tmp2);
}
};
/* same as before, but without exception-throwing expressions */
Map<Unit, EquivalentValue> unitToNoExceptionEquivRhs = new UnitMap<EquivalentValue>(b, graph.size() + 1, 0.7f) {
protected EquivalentValue mapTo(Unit unit) {
Value tmp = SootFilter.binopRhs(unit);
tmp = SootFilter.noExceptionThrowing(tmp);
return SootFilter.equiVal(tmp);
}
};
/* if a more precise sideeffect-tester comes out, please change it here! */
SideEffectTester sideEffect;
if (Scene.v().hasCallGraph() && !options.naive_side_effect()) {
sideEffect = new PASideEffectTester();
} else {
sideEffect = new NaiveSideEffectTester();
}
sideEffect.newMethod(b.getMethod());
UpSafetyAnalysis upSafe = new UpSafetyAnalysis(graph, unitToEquivRhs, sideEffect);
DownSafetyAnalysis downSafe = new DownSafetyAnalysis(graph, unitToNoExceptionEquivRhs, sideEffect);
EarliestnessComputation earliest = new EarliestnessComputation(graph, upSafe, downSafe, sideEffect);
LocalCreation localCreation = new LocalCreation(b.getLocals(), PREFIX);
Iterator<Unit> unitIt = unitChain.snapshotIterator();
{
/* insert the computations at the earliest positions */
while (unitIt.hasNext()) {
Unit currentUnit = unitIt.next();
for (EquivalentValue equiVal : earliest.getFlowBefore(currentUnit)) {
// Value exp = equiVal.getValue();
/* get the unic helper-name for this expression */
Local helper = expToHelper.get(equiVal);
// the beginning of the method
if (currentUnit instanceof IdentityStmt)
currentUnit = getFirstNonIdentityStmt(b);
if (helper == null) {
helper = localCreation.newLocal(equiVal.getType());
expToHelper.put(equiVal, helper);
}
/* insert a new Assignment-stmt before the currentUnit */
Value insertValue = Jimple.cloneIfNecessary(equiVal.getValue());
Unit firstComp = Jimple.v().newAssignStmt(helper, insertValue);
unitChain.insertBefore(firstComp, currentUnit);
}
}
}
{
/* replace old computations by the helper-vars */
unitIt = unitChain.iterator();
while (unitIt.hasNext()) {
Unit currentUnit = unitIt.next();
EquivalentValue rhs = unitToEquivRhs.get(currentUnit);
if (rhs != null) {
Local helper = expToHelper.get(rhs);
if (helper != null)
((AssignStmt) currentUnit).setRightOp(helper);
}
}
}
if (Options.v().verbose())
logger.debug("[" + b.getMethod().getName() + "] Busy Code Motion done!");
}
use of soot.EquivalentValue in project soot by Sable.
the class IFDSReachingDefinitions method createFlowFunctionsFactory.
@Override
public FlowFunctions<Unit, Pair<Value, Set<DefinitionStmt>>, SootMethod> createFlowFunctionsFactory() {
return new FlowFunctions<Unit, Pair<Value, Set<DefinitionStmt>>, SootMethod>() {
@Override
public FlowFunction<Pair<Value, Set<DefinitionStmt>>> getNormalFlowFunction(final Unit curr, Unit succ) {
if (curr instanceof DefinitionStmt) {
final DefinitionStmt assignment = (DefinitionStmt) curr;
return new FlowFunction<Pair<Value, Set<DefinitionStmt>>>() {
@Override
public Set<Pair<Value, Set<DefinitionStmt>>> computeTargets(Pair<Value, Set<DefinitionStmt>> source) {
if (source != zeroValue()) {
if (source.getO1().equivTo(assignment.getLeftOp())) {
return Collections.emptySet();
}
return Collections.singleton(source);
} else {
LinkedHashSet<Pair<Value, Set<DefinitionStmt>>> res = new LinkedHashSet<Pair<Value, Set<DefinitionStmt>>>();
res.add(new Pair<Value, Set<DefinitionStmt>>(assignment.getLeftOp(), Collections.<DefinitionStmt>singleton(assignment)));
return res;
}
}
};
}
return Identity.v();
}
@Override
public FlowFunction<Pair<Value, Set<DefinitionStmt>>> getCallFlowFunction(Unit callStmt, final SootMethod destinationMethod) {
Stmt stmt = (Stmt) callStmt;
InvokeExpr invokeExpr = stmt.getInvokeExpr();
final List<Value> args = invokeExpr.getArgs();
final List<Local> localArguments = new ArrayList<Local>(args.size());
for (Value value : args) {
if (value instanceof Local)
localArguments.add((Local) value);
else
localArguments.add(null);
}
return new FlowFunction<Pair<Value, Set<DefinitionStmt>>>() {
@Override
public Set<Pair<Value, Set<DefinitionStmt>>> computeTargets(Pair<Value, Set<DefinitionStmt>> source) {
if (!destinationMethod.getName().equals("<clinit>") && !destinationMethod.getSubSignature().equals("void run()"))
if (localArguments.contains(source.getO1())) {
int paramIndex = args.indexOf(source.getO1());
Pair<Value, Set<DefinitionStmt>> pair = new Pair<Value, Set<DefinitionStmt>>(new EquivalentValue(Jimple.v().newParameterRef(destinationMethod.getParameterType(paramIndex), paramIndex)), source.getO2());
return Collections.singleton(pair);
}
return Collections.emptySet();
}
};
}
@Override
public FlowFunction<Pair<Value, Set<DefinitionStmt>>> getReturnFlowFunction(final Unit callSite, SootMethod calleeMethod, final Unit exitStmt, Unit returnSite) {
if (!(callSite instanceof DefinitionStmt))
return KillAll.v();
if (exitStmt instanceof ReturnVoidStmt)
return KillAll.v();
return new FlowFunction<Pair<Value, Set<DefinitionStmt>>>() {
@Override
public Set<Pair<Value, Set<DefinitionStmt>>> computeTargets(Pair<Value, Set<DefinitionStmt>> source) {
if (exitStmt instanceof ReturnStmt) {
ReturnStmt returnStmt = (ReturnStmt) exitStmt;
if (returnStmt.getOp().equivTo(source.getO1())) {
DefinitionStmt definitionStmt = (DefinitionStmt) callSite;
Pair<Value, Set<DefinitionStmt>> pair = new Pair<Value, Set<DefinitionStmt>>(definitionStmt.getLeftOp(), source.getO2());
return Collections.singleton(pair);
}
}
return Collections.emptySet();
}
};
}
@Override
public FlowFunction<Pair<Value, Set<DefinitionStmt>>> getCallToReturnFlowFunction(Unit callSite, Unit returnSite) {
if (!(callSite instanceof DefinitionStmt))
return Identity.v();
final DefinitionStmt definitionStmt = (DefinitionStmt) callSite;
return new FlowFunction<Pair<Value, Set<DefinitionStmt>>>() {
@Override
public Set<Pair<Value, Set<DefinitionStmt>>> computeTargets(Pair<Value, Set<DefinitionStmt>> source) {
if (source.getO1().equivTo(definitionStmt.getLeftOp())) {
return Collections.emptySet();
} else {
return Collections.singleton(source);
}
}
};
}
};
}
use of soot.EquivalentValue in project soot by Sable.
the class LockAllocationBodyTransformer method internalTransform.
protected void internalTransform(Body b, FlowSet fs, List<CriticalSectionGroup> groups, boolean[] insertedGlobalLock) {
//
JimpleBody j = (JimpleBody) b;
SootMethod thisMethod = b.getMethod();
PatchingChain<Unit> units = b.getUnits();
Iterator<Unit> unitIt = units.iterator();
Unit firstUnit = j.getFirstNonIdentityStmt();
Unit lastUnit = units.getLast();
// Objects of synchronization, plus book keeping
Local[] lockObj = new Local[groups.size()];
boolean[] addedLocalLockObj = new boolean[groups.size()];
SootField[] globalLockObj = new SootField[groups.size()];
for (int i = 1; i < groups.size(); i++) {
lockObj[i] = Jimple.v().newLocal("lockObj" + i, RefType.v("java.lang.Object"));
addedLocalLockObj[i] = false;
globalLockObj[i] = null;
}
// Get references to them if they do already exist.
for (int i = 1; i < groups.size(); i++) {
CriticalSectionGroup tnGroup = groups.get(i);
if (!tnGroup.useDynamicLock && !tnGroup.useLocksets) {
if (!insertedGlobalLock[i]) {
// use it!
try {
globalLockObj[i] = Scene.v().getMainClass().getFieldByName("globalLockObj" + i);
// field already exists
} catch (RuntimeException re) {
// field does not yet exist (or, as a pre-existing
// error, there is more than one field by this name)
globalLockObj[i] = Scene.v().makeSootField("globalLockObj" + i, RefType.v("java.lang.Object"), Modifier.STATIC | Modifier.PUBLIC);
Scene.v().getMainClass().addField(globalLockObj[i]);
}
insertedGlobalLock[i] = true;
} else {
globalLockObj[i] = Scene.v().getMainClass().getFieldByName("globalLockObj" + i);
}
}
}
// local lock object into the global lock object for use by other fns.
if (// thisMethod.getSubSignature().equals("void
!addedGlobalLockDefs) // <clinit>()") &&
// thisMethod.getDeclaringClass() ==
// Scene.v().getMainClass())
{
// Either get or add the <clinit> method to the main class
SootClass mainClass = Scene.v().getMainClass();
SootMethod clinitMethod = null;
JimpleBody clinitBody = null;
Stmt firstStmt = null;
boolean addingNewClinit = !mainClass.declaresMethod("void <clinit>()");
if (addingNewClinit) {
clinitMethod = Scene.v().makeSootMethod("<clinit>", new ArrayList(), VoidType.v(), Modifier.PUBLIC | Modifier.STATIC);
clinitBody = Jimple.v().newBody(clinitMethod);
clinitMethod.setActiveBody(clinitBody);
mainClass.addMethod(clinitMethod);
} else {
clinitMethod = mainClass.getMethod("void <clinit>()");
clinitBody = (JimpleBody) clinitMethod.getActiveBody();
firstStmt = clinitBody.getFirstNonIdentityStmt();
}
PatchingChain<Unit> clinitUnits = clinitBody.getUnits();
for (int i = 1; i < groups.size(); i++) {
CriticalSectionGroup tnGroup = groups.get(i);
// if( useGlobalLock[i - 1] )
if (!tnGroup.useDynamicLock && !tnGroup.useLocksets) {
// add local lock obj
// addedLocalLockObj[i] = true;
// TODO: add name
clinitBody.getLocals().add(lockObj[i]);
// conflict
// avoidance code
// assign new object to lock obj
Stmt newStmt = Jimple.v().newAssignStmt(lockObj[i], Jimple.v().newNewExpr(RefType.v("java.lang.Object")));
if (addingNewClinit)
clinitUnits.add(newStmt);
else
clinitUnits.insertBeforeNoRedirect(newStmt, firstStmt);
// initialize new object
SootClass objectClass = Scene.v().loadClassAndSupport("java.lang.Object");
RefType type = RefType.v(objectClass);
SootMethod initMethod = objectClass.getMethod("void <init>()");
Stmt initStmt = Jimple.v().newInvokeStmt(Jimple.v().newSpecialInvokeExpr(lockObj[i], initMethod.makeRef(), Collections.EMPTY_LIST));
if (addingNewClinit)
clinitUnits.add(initStmt);
else
clinitUnits.insertBeforeNoRedirect(initStmt, firstStmt);
// copy new object to global static lock object (for use by
// other fns)
Stmt assignStmt = Jimple.v().newAssignStmt(Jimple.v().newStaticFieldRef(globalLockObj[i].makeRef()), lockObj[i]);
if (addingNewClinit)
clinitUnits.add(assignStmt);
else
clinitUnits.insertBeforeNoRedirect(assignStmt, firstStmt);
}
}
if (addingNewClinit)
clinitUnits.add(Jimple.v().newReturnVoidStmt());
addedGlobalLockDefs = true;
}
int tempNum = 1;
// Iterate through all of the transactions in the current method
Iterator fsIt = fs.iterator();
Stmt newPrep = null;
while (fsIt.hasNext()) {
CriticalSection tn = ((SynchronizedRegionFlowPair) fsIt.next()).tn;
if (tn.setNumber == -1)
// this tn should be deleted... for now just skip it!
continue;
if (tn.wholeMethod) {
// remove
thisMethod.setModifiers(thisMethod.getModifiers() & ~(Modifier.SYNCHRONIZED));
// synchronized
// modifier
// for
// this
// method
}
// depends on type of locking
Local clo = null;
// current synchronized region
SynchronizedRegion csr = null;
int lockNum = 0;
boolean moreLocks = true;
while (moreLocks) {
// needed for this transaction, then create one.
if (tn.group.useDynamicLock) {
// adds
Value lock = getLockFor((EquivalentValue) tn.lockObject);
// needed
if (lock instanceof Ref) {
if (lock instanceof InstanceFieldRef) {
InstanceFieldRef ifr = (InstanceFieldRef) lock;
if (ifr.getBase() instanceof FakeJimpleLocal)
lock = reconstruct(b, units, ifr, (tn.entermonitor != null ? tn.entermonitor : tn.beginning), (tn.entermonitor != null));
}
if (!b.getLocals().contains(lockObj[tn.setNumber]))
b.getLocals().add(lockObj[tn.setNumber]);
newPrep = Jimple.v().newAssignStmt(lockObj[tn.setNumber], lock);
if (tn.wholeMethod)
units.insertBeforeNoRedirect(newPrep, firstUnit);
else
units.insertBefore(newPrep, tn.entermonitor);
clo = lockObj[tn.setNumber];
} else if (lock instanceof Local)
clo = (Local) lock;
else
throw new RuntimeException("Unknown type of lock (" + lock + "): expected Ref or Local");
csr = tn;
moreLocks = false;
} else if (tn.group.useLocksets) {
// adds
Value lock = getLockFor((EquivalentValue) tn.lockset.get(lockNum));
// needed
if (lock instanceof FieldRef) {
if (lock instanceof InstanceFieldRef) {
InstanceFieldRef ifr = (InstanceFieldRef) lock;
if (ifr.getBase() instanceof FakeJimpleLocal)
lock = reconstruct(b, units, ifr, (tn.entermonitor != null ? tn.entermonitor : tn.beginning), (tn.entermonitor != null));
}
// add a local variable for this lock
Local lockLocal = Jimple.v().newLocal("locksetObj" + tempNum, RefType.v("java.lang.Object"));
tempNum++;
b.getLocals().add(lockLocal);
// make it refer to the right lock object
newPrep = Jimple.v().newAssignStmt(lockLocal, lock);
if (tn.entermonitor != null)
units.insertBefore(newPrep, tn.entermonitor);
else
units.insertBeforeNoRedirect(newPrep, tn.beginning);
// use it as the lock
clo = lockLocal;
} else if (lock instanceof Local)
clo = (Local) lock;
else
throw new RuntimeException("Unknown type of lock (" + lock + "): expected FieldRef or Local");
if (lockNum + 1 >= tn.lockset.size())
moreLocks = false;
else
moreLocks = true;
if (lockNum > 0) {
SynchronizedRegion nsr = new SynchronizedRegion();
nsr.beginning = csr.beginning;
for (Pair earlyEnd : csr.earlyEnds) {
Stmt earlyExitmonitor = (Stmt) earlyEnd.getO2();
// <early
nsr.earlyEnds.add(new Pair(earlyExitmonitor, null));
// exitmonitor,
// null>
}
// last stmt before exception
nsr.last = csr.last;
// handling
if (csr.end != null) {
Stmt endExitmonitor = csr.end.getO2();
nsr.after = endExitmonitor;
}
csr = nsr;
} else
csr = tn;
} else // global lock
{
if (!addedLocalLockObj[tn.setNumber])
b.getLocals().add(lockObj[tn.setNumber]);
addedLocalLockObj[tn.setNumber] = true;
newPrep = Jimple.v().newAssignStmt(lockObj[tn.setNumber], Jimple.v().newStaticFieldRef(globalLockObj[tn.setNumber].makeRef()));
if (tn.wholeMethod)
units.insertBeforeNoRedirect(newPrep, firstUnit);
else
units.insertBefore(newPrep, tn.entermonitor);
clo = lockObj[tn.setNumber];
csr = tn;
moreLocks = false;
}
// monitorenter/monitorexit statements with new ones
if (true) {
// Remove old prep stmt
if (csr.prepStmt != null) {
// units.remove(clr.prepStmt); // seems to trigger bugs
// in code generation?
}
// Reuse old entermonitor or insert new one, and insert prep
Stmt newEntermonitor = Jimple.v().newEnterMonitorStmt(clo);
if (csr.entermonitor != null) {
units.insertBefore(newEntermonitor, csr.entermonitor);
// redirectTraps(b, clr.entermonitor, newEntermonitor);
// // EXPERIMENTAL
units.remove(csr.entermonitor);
csr.entermonitor = newEntermonitor;
// units.insertBefore(newEntermonitor, newPrep); //
// already inserted
// clr.prepStmt = newPrep;
} else {
units.insertBeforeNoRedirect(newEntermonitor, csr.beginning);
csr.entermonitor = newEntermonitor;
// units.insertBefore(newEntermonitor, newPrep); //
// already inserted
// clr.prepStmt = newPrep;
}
// For each early end, reuse or insert exitmonitor stmt
List<Pair<Stmt, Stmt>> newEarlyEnds = new ArrayList<Pair<Stmt, Stmt>>();
for (Pair<Stmt, Stmt> end : csr.earlyEnds) {
Stmt earlyEnd = end.getO1();
Stmt exitmonitor = end.getO2();
Stmt newExitmonitor = Jimple.v().newExitMonitorStmt(clo);
if (exitmonitor != null) {
if (newPrep != null) {
Stmt tmp = (Stmt) newPrep.clone();
// seems
units.insertBefore(tmp, exitmonitor);
// to
// avoid
// code
// generation
// bugs?
}
units.insertBefore(newExitmonitor, exitmonitor);
// redirectTraps(b, exitmonitor, newExitmonitor); //
// EXPERIMENTAL
units.remove(exitmonitor);
newEarlyEnds.add(new Pair<Stmt, Stmt>(earlyEnd, newExitmonitor));
} else {
if (newPrep != null) {
Stmt tmp = (Stmt) newPrep.clone();
units.insertBefore(tmp, earlyEnd);
}
units.insertBefore(newExitmonitor, earlyEnd);
newEarlyEnds.add(new Pair<Stmt, Stmt>(earlyEnd, newExitmonitor));
}
}
csr.earlyEnds = newEarlyEnds;
// If fallthrough end, reuse or insert goto and exit
if (csr.after != null) {
Stmt newExitmonitor = Jimple.v().newExitMonitorStmt(clo);
if (csr.end != null) {
Stmt exitmonitor = csr.end.getO2();
if (newPrep != null) {
Stmt tmp = (Stmt) newPrep.clone();
units.insertBefore(tmp, exitmonitor);
}
units.insertBefore(newExitmonitor, exitmonitor);
// redirectTraps(b, exitmonitor, newExitmonitor); //
// EXPERIMENTAL
units.remove(exitmonitor);
csr.end = new Pair<Stmt, Stmt>(csr.end.getO1(), newExitmonitor);
} else {
if (newPrep != null) {
Stmt tmp = (Stmt) newPrep.clone();
units.insertBefore(tmp, csr.after);
}
// steal
units.insertBefore(newExitmonitor, csr.after);
// jumps
// to
// end,
// send
// them
// to
// monitorexit
Stmt newGotoStmt = Jimple.v().newGotoStmt(csr.after);
units.insertBeforeNoRedirect(newGotoStmt, csr.after);
csr.end = new Pair<Stmt, Stmt>(newGotoStmt, newExitmonitor);
csr.last = newGotoStmt;
}
}
// If exceptional end, reuse it, else insert it and traps
Stmt newExitmonitor = Jimple.v().newExitMonitorStmt(clo);
if (csr.exceptionalEnd != null) {
Stmt exitmonitor = csr.exceptionalEnd.getO2();
if (newPrep != null) {
Stmt tmp = (Stmt) newPrep.clone();
units.insertBefore(tmp, exitmonitor);
}
units.insertBefore(newExitmonitor, exitmonitor);
units.remove(exitmonitor);
csr.exceptionalEnd = new Pair<Stmt, Stmt>(csr.exceptionalEnd.getO1(), newExitmonitor);
} else {
// insert after the last end
// last end stmt (not same as last
Stmt lastEnd = null;
// stmt)
if (csr.end != null) {
lastEnd = csr.end.getO1();
} else {
for (Pair earlyEnd : csr.earlyEnds) {
Stmt end = (Stmt) earlyEnd.getO1();
if (lastEnd == null || (units.contains(lastEnd) && units.contains(end) && units.follows(end, lastEnd)))
lastEnd = end;
}
}
if (// || !units.contains(clr.last))
csr.last == null)
// last stmt and last end are
csr.last = lastEnd;
// the same
if (lastEnd == null)
throw new RuntimeException("Lock Region has no ends! Where should we put the exception handling???");
// Add throwable
Local throwableLocal = Jimple.v().newLocal("throwableLocal" + (throwableNum++), RefType.v("java.lang.Throwable"));
b.getLocals().add(throwableLocal);
// Add stmts
Stmt newCatch = Jimple.v().newIdentityStmt(throwableLocal, Jimple.v().newCaughtExceptionRef());
if (csr.last == null)
throw new RuntimeException("WHY IS clr.last NULL???");
if (newCatch == null)
throw new RuntimeException("WHY IS newCatch NULL???");
units.insertAfter(newCatch, csr.last);
units.insertAfter(newExitmonitor, newCatch);
Stmt newThrow = Jimple.v().newThrowStmt(throwableLocal);
units.insertAfter(newThrow, newExitmonitor);
// Add traps
SootClass throwableClass = Scene.v().loadClassAndSupport("java.lang.Throwable");
b.getTraps().addFirst(Jimple.v().newTrap(throwableClass, newExitmonitor, newThrow, newCatch));
b.getTraps().addFirst(Jimple.v().newTrap(throwableClass, csr.beginning, lastEnd, newCatch));
csr.exceptionalEnd = new Pair<Stmt, Stmt>(newThrow, newExitmonitor);
}
}
lockNum++;
}
// deal with waits and notifys
{
for (Unit uNotify : tn.notifys) {
Stmt sNotify = (Stmt) uNotify;
Stmt newNotify = Jimple.v().newInvokeStmt(Jimple.v().newVirtualInvokeExpr(clo, sNotify.getInvokeExpr().getMethodRef().declaringClass().getMethod("void notifyAll()").makeRef(), Collections.EMPTY_LIST));
if (newPrep != null) {
Stmt tmp = (Stmt) newPrep.clone();
units.insertBefore(tmp, sNotify);
units.insertBefore(newNotify, tmp);
} else
units.insertBefore(newNotify, sNotify);
redirectTraps(b, sNotify, newNotify);
units.remove(sNotify);
}
// Replace base object of calls to wait with appropriate lockobj
for (Unit uWait : tn.waits) {
Stmt sWait = (Stmt) uWait;
// WHAT
((InstanceInvokeExpr) sWait.getInvokeExpr()).setBase(clo);
// LOCKS???
if (newPrep != null)
units.insertBefore((Stmt) newPrep.clone(), sWait);
}
}
}
}
use of soot.EquivalentValue in project soot by Sable.
the class LockAllocationBodyTransformer method reconstruct.
public InstanceFieldRef reconstruct(Body b, PatchingChain<Unit> units, InstanceFieldRef lock, Stmt insertBefore, boolean redirect) {
logger.debug("Reconstructing " + lock);
if (!(lock.getBase() instanceof FakeJimpleLocal)) {
logger.debug(" base is not a FakeJimpleLocal");
return lock;
}
FakeJimpleLocal fakeBase = (FakeJimpleLocal) lock.getBase();
if (!(fakeBase.getInfo() instanceof LockableReferenceAnalysis))
throw new RuntimeException("InstanceFieldRef cannot be reconstructed due to missing LocksetAnalysis info: " + lock);
LockableReferenceAnalysis la = (LockableReferenceAnalysis) fakeBase.getInfo();
EquivalentValue baseEqVal = la.baseFor(lock);
if (baseEqVal == null)
throw new RuntimeException("InstanceFieldRef cannot be reconstructed due to lost base from Lockset");
Value base = baseEqVal.getValue();
Local baseLocal;
if (base instanceof InstanceFieldRef) {
Value newBase = reconstruct(b, units, (InstanceFieldRef) base, insertBefore, redirect);
baseLocal = Jimple.v().newLocal("baseLocal" + (baseLocalNum++), newBase.getType());
b.getLocals().add(baseLocal);
// make it equal to the right value
Stmt baseAssign = Jimple.v().newAssignStmt(baseLocal, newBase);
if (redirect == true)
units.insertBefore(baseAssign, insertBefore);
else
units.insertBeforeNoRedirect(baseAssign, insertBefore);
} else if (base instanceof Local)
baseLocal = (Local) base;
else
throw new RuntimeException("InstanceFieldRef cannot be reconstructed because it's base is of an unsupported type" + base.getType() + ": " + base);
InstanceFieldRef newLock = Jimple.v().newInstanceFieldRef(baseLocal, lock.getField().makeRef());
logger.debug(" as " + newLock);
return newLock;
}
use of soot.EquivalentValue in project soot by Sable.
the class LocalMustAliasAnalysis method flowThrough.
@Override
protected void flowThrough(HashMap<Value, Integer> in, Unit u, HashMap<Value, Integer> out) {
Stmt s = (Stmt) u;
out.clear();
out.putAll(in);
if (s instanceof DefinitionStmt) {
DefinitionStmt ds = (DefinitionStmt) s;
Value lhs = ds.getLeftOp();
Value rhs = ds.getRightOp();
if (rhs instanceof CastExpr) {
// un-box casted value
CastExpr castExpr = (CastExpr) rhs;
rhs = castExpr.getOp();
}
if ((lhs instanceof Local || (lhs instanceof FieldRef && this.localsAndFieldRefs.contains(new EquivalentValue(lhs)))) && lhs.getType() instanceof RefLikeType) {
if (rhs instanceof Local) {
// local-assignment - must be aliased...
Integer val = in.get(rhs);
if (val != null)
out.put(lhs, val);
} else if (rhs instanceof ThisRef) {
// ThisRef can never change; assign unique number
out.put(lhs, thisRefNumber());
} else if (rhs instanceof ParameterRef) {
// ParameterRef can never change; assign unique number
out.put(lhs, parameterRefNumber((ParameterRef) rhs));
} else {
// assign number for expression
out.put(lhs, numberOfRhs(rhs));
}
}
} else {
// which other kind of statement has def-boxes? hopefully none...
assert s.getDefBoxes().isEmpty();
}
}
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