Dataset bug fix (#157)

- Remove added constraint.
- Add function invocation processing.

Now, we can track datasets without explicitly adding a constraint.

Author: khatchad

com.ibm.wala.cast.python.ml/source/com/ibm/wala/cast/python/ml/client/PythonTensorAnalysisEngine.java

@@ -169,7 +169,8 @@ private static Set<PointsToSetVariable> getDataflowSources(
             processInstructionInterprocedurally(
                 propertyRead, objectRef, localPointerKeyNode, src, sources, pointerAnalysis);
           } else if (def instanceof EachElementGetInstruction
-              || def instanceof PythonPropertyRead) {
+              || def instanceof PythonPropertyRead
+              || def instanceof PythonInvokeInstruction) {
             processInstruction(
                 def,
                 du,

com.ibm.wala.cast.python/source/com/ibm/wala/cast/python/ipa/callgraph/PythonSSAPropagationCallGraphBuilder.java

@@ -12,13 +12,10 @@
 
 import com.ibm.wala.cast.ipa.callgraph.AstSSAPropagationCallGraphBuilder;
 import com.ibm.wala.cast.ipa.callgraph.GlobalObjectKey;
-import com.ibm.wala.cast.ir.ssa.AstPropertyRead;
-import com.ibm.wala.cast.ir.ssa.EachElementGetInstruction;
 import com.ibm.wala.cast.python.ipa.summaries.BuiltinFunctions.BuiltinFunction;
 import com.ibm.wala.cast.python.ir.PythonLanguage;
 import com.ibm.wala.cast.python.ssa.PythonInstructionVisitor;
 import com.ibm.wala.cast.python.ssa.PythonInvokeInstruction;
-import com.ibm.wala.cast.python.ssa.PythonPropertyRead;
 import com.ibm.wala.cast.python.types.PythonTypes;
 import com.ibm.wala.classLoader.IClass;
 import com.ibm.wala.classLoader.IField;
@@ -40,7 +37,6 @@
 import com.ibm.wala.ssa.SSAArrayStoreInstruction;
 import com.ibm.wala.ssa.SSABinaryOpInstruction;
 import com.ibm.wala.ssa.SSAGetInstruction;
-import com.ibm.wala.ssa.SSAInstruction;
 import com.ibm.wala.ssa.SymbolTable;
 import com.ibm.wala.types.FieldReference;
 import com.ibm.wala.types.TypeReference;
@@ -179,42 +175,6 @@ public String toString() {
       super.visitGet(instruction);
     }
 
-    @Override
-    public void visitPropertyRead(AstPropertyRead instruction) {
-      super.visitPropertyRead(instruction);
-
-      if (instruction instanceof PythonPropertyRead) {
-        PythonPropertyRead ppr = (PythonPropertyRead) instruction;
-        SSAInstruction memberRefDef = du.getDef(ppr.getMemberRef());
-
-        if (memberRefDef != null && memberRefDef instanceof EachElementGetInstruction) {
-          // most likely a for each "property."
-          final PointerKey memberRefKey = this.getPointerKeyForLocal(ppr.getMemberRef());
-
-          // for each def of the property read.
-          for (int i = 0; i < ppr.getNumberOfDefs(); i++) {
-            PointerKey defKey = this.getPointerKeyForLocal(ppr.getDef(i));
-
-            // add an assignment constraint straight away as the traversal variable won't have a
-            // non-empty points-to set but still may be used for a dataflow analysis.
-            if (this.system.newConstraint(defKey, assignOperator, memberRefKey))
-              logger.fine(
-                  () ->
-                      "Added new system constraint for global read from: "
-                          + defKey
-                          + " to: "
-                          + memberRefKey
-                          + " for instruction: "
-                          + instruction
-                          + ".");
-            else
-              logger.fine(
-                  () -> "No constraint added for global read in instruction: " + instruction + ".");
-          }
-        }
-      }
-    }
-
     @Override
     public void visitPythonInvoke(PythonInvokeInstruction inst) {
       visitInvokeInternal(inst, new DefaultInvariantComputer());