Ejemplo n.º 1
0
  /**
   * Check consistency of a callgraph, and check that this call graph is a subset of a super-graph
   *
   * @param warnings object to track warnings
   * @param cg
   * @param superCG
   * @param superMethods
   * @param thisAlgorithm
   * @return a squashed version of cg
   */
  private static Graph<MethodReference> checkCallGraph(
      CallGraph cg,
      Graph<MethodReference> superCG,
      Set<MethodReference> superMethods,
      String thisAlgorithm) {
    try {
      GraphIntegrity.check(cg);
    } catch (UnsoundGraphException e1) {
      Assert.assertTrue(e1.getMessage(), false);
    }
    Set<MethodReference> callGraphMethods = CallGraphStats.collectMethods(cg);
    System.err.println(thisAlgorithm + " methods reached: " + callGraphMethods.size());
    System.err.println(CallGraphStats.getStats(cg));

    Graph<MethodReference> thisCG = squashCallGraph(thisAlgorithm, cg);

    if (superCG != null) {
      com.ibm.wala.ipa.callgraph.impl.Util.checkGraphSubset(superCG, thisCG);
    } else {
      // SJF: RTA has rotted a bit since it doesn't handle LoadClass instructions.
      // Commenting this out for now.
      // if (!superMethods.containsAll(callGraphMethods)) {
      // Set<MethodReference> temp = HashSetFactory.make();
      // temp.addAll(callGraphMethods);
      // temp.removeAll(superMethods);
      // System.err.println("Violations");
      // for (MethodReference m : temp) {
      // System.err.println(m);
      // }
      // Assertions.UNREACHABLE();
      // }
    }

    return thisCG;
  }
Ejemplo n.º 2
0
  /**
   * Check properties of the InterproceduralCFG
   *
   * @param cg
   */
  private static void checkICFG(CallGraph cg) {
    InterproceduralCFG icfg = new InterproceduralCFG(cg);

    try {
      GraphIntegrity.check(icfg);
    } catch (UnsoundGraphException e) {
      e.printStackTrace();
      Assert.assertTrue(false);
    }

    // perform a little icfg exercise
    int count = 0;
    for (Iterator<BasicBlockInContext<ISSABasicBlock>> it = icfg.iterator(); it.hasNext(); ) {
      BasicBlockInContext<ISSABasicBlock> bb = it.next();
      if (icfg.hasCall(bb)) {
        count++;
      }
    }
  }
Ejemplo n.º 3
0
  /**
   * TODO: refactor this to avoid excessive code bloat.
   *
   * @throws CancelException
   * @throws IllegalArgumentException
   */
  public static void doCallGraphs(
      AnalysisOptions options,
      AnalysisCache cache,
      IClassHierarchy cha,
      AnalysisScope scope,
      boolean testPAToString)
      throws IllegalArgumentException, CancelException {

    // ///////////////
    // // RTA /////
    // ///////////////
    CallGraph cg = CallGraphTestUtil.buildRTA(options, cache, cha, scope);
    try {
      GraphIntegrity.check(cg);
    } catch (UnsoundGraphException e1) {
      e1.printStackTrace();
      Assert.assertTrue(e1.getMessage(), false);
    }

    Set<MethodReference> rtaMethods = CallGraphStats.collectMethods(cg);
    System.err.println("RTA methods reached: " + rtaMethods.size());
    System.err.println(CallGraphStats.getStats(cg));
    System.err.println("RTA warnings:\n");

    // ///////////////
    // // 0-CFA /////
    // ///////////////
    cg = CallGraphTestUtil.buildZeroCFA(options, cache, cha, scope, testPAToString);

    // FIXME: annoying special cases caused by clone2assign mean using
    // the rta graph for proper graph subset checking does not work.
    // (note that all the other such checks do use proper graph subset)
    Graph<MethodReference> squashZero = checkCallGraph(cg, null, rtaMethods, "0-CFA");

    // test Pretransitive 0-CFA
    // not currently supported
    // warnings = new WarningSet();
    // options.setUsePreTransitiveSolver(true);
    // CallGraph cgP = CallGraphTestUtil.buildZeroCFA(options, cha, scope,
    // warnings);
    // options.setUsePreTransitiveSolver(false);
    // Graph squashPT = checkCallGraph(warnings, cgP, squashZero, null, "Pre-T
    // 1");
    // checkCallGraph(warnings, cg, squashPT, null, "Pre-T 2");

    // ///////////////
    // // 0-1-CFA ///
    // ///////////////
    cg = CallGraphTestUtil.buildZeroOneCFA(options, cache, cha, scope, testPAToString);
    Graph<MethodReference> squashZeroOne = checkCallGraph(cg, squashZero, null, "0-1-CFA");

    // ///////////////////////////////////////////////////
    // // 0-CFA augmented to disambiguate containers ///
    // ///////////////////////////////////////////////////
    cg = CallGraphTestUtil.buildZeroContainerCFA(options, cache, cha, scope);
    Graph<MethodReference> squashZeroContainer =
        checkCallGraph(cg, squashZero, null, "0-Container-CFA");

    // ///////////////////////////////////////////////////
    // // 0-1-CFA augmented to disambiguate containers ///
    // ///////////////////////////////////////////////////
    cg = CallGraphTestUtil.buildZeroOneContainerCFA(options, cache, cha, scope);
    checkCallGraph(cg, squashZeroContainer, null, "0-1-Container-CFA");
    checkCallGraph(cg, squashZeroOne, null, "0-1-Container-CFA");

    // test ICFG
    checkICFG(cg);
    return;
    // /////////////
    // // 1-CFA ///
    // /////////////
    // warnings = new WarningSet();
    // cg = buildOneCFA();

  }