1 package Analysis.Disjoint;
4 import java.util.Map.Entry;
10 /////////////////////////////////////////////
12 // Effects analysis computes read/write/strong
13 // update and other sorts of effects for the
14 // scope of a method or rblock. The effects
15 // are associated with the heap roots through
16 // which a reference to the effect target was
19 // The effects analysis piggy-backs
20 // on the disjoint reachability analysis,
21 // if requested, to support OoOJava and
22 // potentially other analysis clients.
24 /////////////////////////////////////////////
26 public class EffectsAnalysis {
28 // the effects analysis should combine taints
29 // that match except for predicates--preds just
30 // support interprocedural analysis
31 private Hashtable<Taint, Set<Effect>> taint2effects;
33 // redundant views of the effect set for
34 // efficient retrieval
35 private Hashtable<FlatSESEEnterNode, Hashtable<Taint, Set<Effect>> > sese2te;
36 private Hashtable<FlatNode, Hashtable<Taint, Set<Effect>> > stallSite2te;
38 public static State state;
39 public static BuildStateMachines buildStateMachines;
42 public EffectsAnalysis() {
43 taint2effects = new Hashtable<Taint, Set<Effect>>();
45 sese2te = new Hashtable<FlatSESEEnterNode, Hashtable<Taint, Set<Effect>> >();
46 stallSite2te = new Hashtable<FlatNode, Hashtable<Taint, Set<Effect>> >();
50 public Set<Effect> getEffects(Taint t) {
51 Taint tNoPreds = Canonical.changePredsTo( t,
54 return taint2effects.get(tNoPreds);
57 public Iterator iteratorTaintEffectPairs() {
58 return taint2effects.entrySet().iterator();
61 protected void add(Taint t, Effect e, FlatNode currentProgramPoint) {
63 Taint tNoPreds = Canonical.changePredsTo( t,
68 buildStateMachines.addToStateMachine( t, e, currentProgramPoint );
71 // add to the global bag
72 Set<Effect> effectSet = taint2effects.get(tNoPreds);
73 if (effectSet == null) {
74 effectSet = new HashSet<Effect>();
77 taint2effects.put(tNoPreds, effectSet);
79 // add to the alternate retrieval bags
80 if( t.getSESE() != null ) {
81 FlatSESEEnterNode sese = t.getSESE();
83 Hashtable<Taint, Set<Effect>> te = sese2te.get( sese );
85 te = new Hashtable<Taint, Set<Effect>>();
88 Set<Effect> effects = te.get(tNoPreds);
89 if (effects == null) {
90 effects = new HashSet<Effect>();
93 te.put(tNoPreds, effects);
95 sese2te.put(sese, te);
98 assert t.getStallSite() != null;
99 FlatNode stallSite = t.getStallSite();
101 Hashtable<Taint, Set<Effect>> te = stallSite2te.get( stallSite );
103 te = new Hashtable<Taint, Set<Effect>>();
106 Set<Effect> effects = te.get(tNoPreds);
107 if (effects == null) {
108 effects = new HashSet<Effect>();
111 te.put(tNoPreds, effects);
112 stallSite2te.put(stallSite, te);
117 public Hashtable<Taint, Set<Effect>> get( FlatSESEEnterNode sese ) {
118 return sese2te.get(sese);
121 public Hashtable<Taint, Set<Effect>> get( FlatNode stallSite ) {
122 return stallSite2te.get(stallSite);
127 public void analyzeFlatFieldNode(ReachGraph rg, TempDescriptor rhs, FieldDescriptor fld, FlatNode currentProgramPoint) {
129 VariableNode vn = rg.td2vn.get(rhs);
134 for (Iterator<RefEdge> iterator = vn.iteratorToReferencees(); iterator.hasNext();) {
135 RefEdge edge = iterator.next();
136 TaintSet taintSet = edge.getTaints();
137 AllocSite affectedAlloc = edge.getDst().getAllocSite();
138 Effect effect = new Effect(affectedAlloc, Effect.read, fld);
140 for (Iterator<Taint> taintSetIter = taintSet.iterator(); taintSetIter.hasNext();) {
141 Taint taint = taintSetIter.next();
142 add(taint, effect, currentProgramPoint);
147 public void analyzeFlatSetFieldNode(ReachGraph rg, TempDescriptor lhs, FieldDescriptor fld, FlatNode currentProgramPoint, boolean strongUpdate) {
149 VariableNode vn = rg.td2vn.get(lhs);
154 for (Iterator<RefEdge> iterator = vn.iteratorToReferencees(); iterator.hasNext();) {
155 RefEdge edge = iterator.next();
156 TaintSet taintSet = edge.getTaints();
157 AllocSite affectedAlloc = edge.getDst().getAllocSite();
158 Effect effect = new Effect(affectedAlloc, Effect.write, fld);
159 Effect effectSU = null;
162 effectSU = new Effect(affectedAlloc, Effect.strongupdate, fld);
165 for (Iterator<Taint> taintSetIter = taintSet.iterator(); taintSetIter.hasNext();) {
166 Taint taint = taintSetIter.next();
167 add( taint, effect, currentProgramPoint );
170 add( taint, effectSU, currentProgramPoint );
177 public String toString() {
178 return taint2effects.toString();
181 public void writeEffects( String outfile ) {
183 BufferedWriter bw = new BufferedWriter(new FileWriter(outfile));
185 bw.write( "Effects\n---------------\n\n" );
187 Iterator meItr = taint2effects.entrySet().iterator();
188 while( meItr.hasNext() ) {
189 Map.Entry me = (Map.Entry) meItr.next();
190 Taint taint = (Taint) me.getKey();
191 Set<Effect> effects = (Set<Effect>) me.getValue();
193 Iterator<Effect> eItr = effects.iterator();
194 while( eItr.hasNext() ) {
195 Effect e = eItr.next();
197 bw.write( taint+"-->"+e+"\n" );
202 } catch( IOException e ) {}
206 * public MethodEffects getMethodEffectsByMethodContext(MethodContext mc){
207 * return mapMethodContextToMethodEffects.get(mc); }
209 * public void createNewMapping(MethodContext mcNew) { if(!methodeffects)
210 * return; if (!mapMethodContextToMethodEffects.containsKey(mcNew)) {
211 * MethodEffects meNew = new MethodEffects();
212 * mapMethodContextToMethodEffects.put(mcNew, meNew); } }
216 * public void analyzeFlatCall(OwnershipGraph calleeOG, MethodContext
217 * calleeMC, MethodContext callerMC, FlatCall fc) { if(!methodeffects) return;
218 * MethodEffects me = mapMethodContextToMethodEffects.get(callerMC);
219 * MethodEffects meFlatCall = mapMethodContextToMethodEffects .get(calleeMC);
220 * me.analyzeFlatCall(calleeOG, fc, callerMC, meFlatCall);
221 * mapMethodContextToMethodEffects.put(callerMC, me); }
225 * public void analyzeFlatFieldNode(MethodContext mc, OwnershipGraph og,
226 * TempDescriptor srcDesc, FieldDescriptor fieldDesc) { if(!methodeffects)
227 * return; MethodEffects me = mapMethodContextToMethodEffects.get(mc);
228 * me.analyzeFlatFieldNode(og, srcDesc, fieldDesc);
229 * mapMethodContextToMethodEffects.put(mc, me); }
231 * public void analyzeFlatSetFieldNode(MethodContext mc, OwnershipGraph og,
232 * TempDescriptor dstDesc, FieldDescriptor fieldDesc) { if(!methodeffects)
233 * return; MethodEffects me = mapMethodContextToMethodEffects.get(mc);
234 * me.analyzeFlatSetFieldNode(og, dstDesc, fieldDesc);
235 * mapMethodContextToMethodEffects.put(mc, me); }
237 * public void analyzeFlatSetElementNode(MethodContext mc, OwnershipGraph og,
238 * TempDescriptor dstDesc, FieldDescriptor fieldDesc) { if(!methodeffects)
239 * return; MethodEffects me = mapMethodContextToMethodEffects.get(mc);
240 * me.analyzeFlatSetElementNode(og, dstDesc, fieldDesc);
241 * mapMethodContextToMethodEffects.put(mc, me); }
243 * public void analyzeFlatElementNode(MethodContext mc, OwnershipGraph og,
244 * TempDescriptor dstDesc, FieldDescriptor fieldDesc) { if(!methodeffects)
245 * return; MethodEffects me = mapMethodContextToMethodEffects.get(mc);
246 * me.analyzeFlatElementNode(og, dstDesc, fieldDesc);
247 * mapMethodContextToMethodEffects.put(mc, me); }
250 * public void writeMethodEffectsResult() throws IOException {
252 * try { BufferedWriter bw = new BufferedWriter(new FileWriter(
253 * "MethodEffects_report.txt"));
255 * Set<MethodContext> mcSet = mapMethodContextToMethodEffects.keySet();
256 * Iterator<MethodContext> mcIter = mcSet.iterator(); while (mcIter.hasNext())
257 * { MethodContext mc = mcIter.next(); MethodDescriptor md =
258 * (MethodDescriptor) mc.getDescriptor();
260 * int startIdx = 0; if (!md.isStatic()) { startIdx = 1; }
262 * MethodEffects me = mapMethodContextToMethodEffects.get(mc); EffectsSet
263 * effectsSet = me.getEffects();
265 * bw.write("Method " + mc + " :\n"); for (int i = startIdx; i <
266 * md.numParameters() + startIdx; i++) {
268 * String paramName = md.getParamName(i - startIdx);
270 * Set<EffectsKey> effectSet = effectsSet.getReadingSet(i); String keyStr =
271 * "{"; if (effectSet != null) { Iterator<EffectsKey> effectIter =
272 * effectSet.iterator(); while (effectIter.hasNext()) { EffectsKey key =
273 * effectIter.next(); keyStr += " " + key; } } keyStr += " }";
274 * bw.write(" Paramter " + paramName + " ReadingSet=" + keyStr + "\n");
276 * effectSet = effectsSet.getWritingSet(new Integer(i)); keyStr = "{"; if
277 * (effectSet != null) { Iterator<EffectsKey> effectIter =
278 * effectSet.iterator(); while (effectIter.hasNext()) { EffectsKey key =
279 * effectIter.next(); keyStr += " " + key; } }
281 * keyStr += " }"; bw.write(" Paramter " + paramName + " WritingngSet=" +
288 * bw.close(); } catch (IOException e) { System.err.println(e); }
293 public Hashtable<Taint, Set<Effect>> getAllEffects() {
294 return taint2effects;