Esempio n. 1
0
    private void add(PptTopLevel ppt, ValueTuple vt) {
      // Add the sample to any splitters
      if (ppt.has_splitters()) {
        for (PptSplitter ppt_split : ppt.splitters) {
          PptConditional ppt_cond = ppt_split.choose_conditional(vt);
          if (ppt_cond != null) add(ppt_cond, vt);
          else debug.fine(": sample doesn't pick conditional");
        }
      }

      // if this is a numbered exit, apply to the combined exit as well
      if (!(ppt instanceof PptConditional) && ppt.ppt_name.isNumberedExitPoint()) {
        PptTopLevel parent = all_ppts.get(ppt.ppt_name.makeExit());
        if (parent != null) {
          parent.get_missingOutOfBounds(ppt, vt);
          add(parent, vt);
        }
      }

      // If the point has no variables, skip it
      if (ppt.var_infos.length == 0) return;

      // We should have received sample here before, or there is nothing
      // to check.
      // Yoav added: It can be that the different dtrace and inv files have different program points
      if (false && ppt.num_samples() <= 0)
        Assert.assertTrue(
            ppt.num_samples() > 0,
            "ppt " + ppt.name + " has 0 samples and " + ppt.var_infos.length + " variables");

      // Loop through each slice
      slice_loop:
      for (Iterator<PptSlice> i = ppt.views_iterator(); i.hasNext(); ) {
        PptSlice slice = i.next();
        if (debug_detail.isLoggable(Level.FINE))
          debug_detail.fine(
              ": processing slice " + slice + "vars: " + Debug.toString(slice.var_infos, vt));

        // If any variables are missing, skip this slice
        for (int j = 0; j < slice.var_infos.length; j++) {
          VarInfo v = slice.var_infos[j];
          int mod = vt.getModified(v);
          if (v.isMissing(vt)) {
            if (debug_detail.isLoggable(Level.FINE))
              debug_detail.fine(": : Skipping slice, " + v.name() + " missing");
            continue slice_loop;
          }
          if (v.missingOutOfBounds()) {
            if (debug_detail.isLoggable(Level.FINE))
              debug.fine(": : Skipping slice, " + v.name() + " out of bounds");
            continue slice_loop;
          }
        }

        // Loop through each invariant
        for (Invariant inv : slice.invs) {
          if (debug_detail.isLoggable(Level.FINE))
            debug_detail.fine(": : Processing invariant: " + inv);
          if (!inv.isActive()) {
            if (debug_detail.isLoggable(Level.FINE))
              debug_detail.fine(": : skipped non-active " + inv);
            continue;
          }

          // Yoav added
          if (!activeInvariants.contains(inv)) {
            // System.out.printf ("skipping invariant %s:%s\n", inv.ppt.name(),
            //                   inv.format());
            continue;
          }

          // String invRep = invariant2str(ppt, inv);
          testedInvariants.add(inv);

          InvariantStatus status = inv.add_sample(vt, 1);
          sample_cnt++;
          if (status != InvariantStatus.NO_CHANGE) {
            LineNumberReader lnr = FileIO.data_trace_state.reader;
            String line = (lnr == null) ? "?" : String.valueOf(lnr.getLineNumber());
            if (!quiet) {
              output_stream.println(
                  "At ppt "
                      + ppt.name
                      + ", Invariant '"
                      + inv.format()
                      + "' invalidated by sample "
                      + Debug.toString(slice.var_infos, vt)
                      + "at line "
                      + line
                      + " in file "
                      + FileIO.data_trace_state.filename);
            }
            failedInvariants.add(inv);
            activeInvariants.remove(inv);
            error_cnt++;
          }
        }
      }
    }
Esempio n. 2
0
  public static void extract_consequent(PptMap ppts) {
    // Retrieve Ppt objects in sorted order.
    // Use a custom comparator for a specific ordering
    Comparator<PptTopLevel> comparator = new Ppt.NameComparator();
    TreeSet<PptTopLevel> ppts_sorted = new TreeSet<PptTopLevel>(comparator);
    ppts_sorted.addAll(ppts.asCollection());

    for (PptTopLevel ppt : ppts_sorted) {
      extract_consequent_maybe(ppt, ppts);
    }

    PrintWriter pw = new PrintWriter(System.out, true);

    // All conditions at a program point.  A TreeSet to enable
    // deterministic output.
    TreeSet<String> allConds = new TreeSet<String>();
    for (String pptname : pptname_to_conditions.keySet()) {
      Map<String, Map<String, HashedConsequent>> cluster_to_conditions =
          pptname_to_conditions.get(pptname);
      for (Map.Entry</*@KeyFor("cluster_to_conditions")*/ String, Map<String, HashedConsequent>>
          entry : cluster_to_conditions.entrySet()) {
        String predicate = entry.getKey();
        Map<String, HashedConsequent> conditions = entry.getValue();
        StringBuffer conjunctionJava = new StringBuffer();
        StringBuffer conjunctionDaikon = new StringBuffer();
        StringBuffer conjunctionESC = new StringBuffer();
        StringBuffer conjunctionSimplify = new StringBuffer("(AND ");
        int count = 0;
        for (Map.Entry</*@KeyFor("conditions")*/ String, HashedConsequent> entry2 :
            conditions.entrySet()) {
          count++;
          String condIndex = entry2.getKey();
          HashedConsequent cond = entry2.getValue();
          if (cond.fakeFor != null) {
            count--;
            continue;
          }
          String javaStr = cond.inv.format_using(OutputFormat.JAVA);
          String daikonStr = cond.inv.format_using(OutputFormat.DAIKON);
          String escStr = cond.inv.format_using(OutputFormat.ESCJAVA);
          String simplifyStr = cond.inv.format_using(OutputFormat.SIMPLIFY);
          allConds.add(combineDummy(condIndex, "<dummy> " + daikonStr, escStr, simplifyStr));
          //           allConds.add(condIndex);
          if (count > 0) {
            conjunctionJava.append(" && ");
            conjunctionDaikon.append(" and ");
            conjunctionESC.append(" && ");
            conjunctionSimplify.append(" ");
          }
          conjunctionJava.append(javaStr);
          conjunctionDaikon.append(daikonStr);
          conjunctionESC.append(escStr);
          conjunctionSimplify.append(simplifyStr);
        }
        conjunctionSimplify.append(")");
        String conj = conjunctionJava.toString();
        // Avoid inserting self-contradictory conditions such as "x == 1 &&
        // x == 2", or conjunctions of only a single condition.
        if (count < 2
            || contradict_inv_pattern.matcher(conj).find()
            || useless_inv_pattern_1.matcher(conj).find()
            || useless_inv_pattern_2.matcher(conj).find()) {
          // System.out.println("Suppressing: " + conj);
        } else {
          allConds.add(
              combineDummy(
                  conjunctionJava.toString(),
                  conjunctionDaikon.toString(),
                  conjunctionESC.toString(),
                  conjunctionSimplify.toString()));
        }
      }

      if (allConds.size() > 0) {
        pw.println();
        pw.println("PPT_NAME " + pptname);
        for (String s : allConds) {
          pw.println(s);
        }
      }
      allConds.clear();
    }

    pw.flush();
  }
Esempio n. 3
0
  private static void checkInvariants() throws IOException {
    // Read the invariant file
    PptMap ppts = FileIO.read_serialized_pptmap(inv_file, true);

    // Yoav: make sure we have unique invariants
    InvariantFilters fi = InvariantFilters.defaultFilters();
    // Set<String> allInvariantsStr = new HashSet<String>();
    Set<Invariant> allInvariants = new HashSet<Invariant>();
    for (PptTopLevel ppt : ppts.all_ppts())
      for (Iterator<PptSlice> i = ppt.views_iterator(); i.hasNext(); ) {
        PptSlice slice = i.next();
        for (Invariant inv : slice.invs) {
          if (doConf && inv.getConfidence() < Invariant.dkconfig_confidence_limit) {
            // System.out.printf ("inv ignored (conf): %s:%s\n", inv.ppt.name(),
            //                   inv.format());
            continue;
          }

          if (doFilter && fi.shouldKeep(inv) == null) {
            // System.out.printf ("inv ignored (filter): %s:%s\n",
            //                     inv.ppt.name(), inv.format());
            continue;
          }
          activeInvariants.add(inv);

          // String n = invariant2str(ppt, inv);
          // if (!allInvariants.contains(inv) && allInvariantsStr.contains(n)) throw new
          // Daikon.TerminationMessage("Two invariants have the same ppt.name+inv.rep:"+n);
          allInvariants.add(inv);
          // allInvariantsStr.add(n);
        }
      }

    // Read and process the data trace files
    FileIO.Processor processor = new InvariantCheckProcessor();

    Daikon.FileIOProgress progress = new Daikon.FileIOProgress();
    progress.start();
    progress.clear();
    FileIO.read_data_trace_files(dtrace_files, ppts, processor, false);
    progress.shouldStop = true;
    System.out.println();
    System.out.printf(
        "%s: %,d errors found in %,d samples (%s)\n",
        inv_file, error_cnt, sample_cnt, toPercentage(error_cnt, sample_cnt));
    int failedCount = failedInvariants.size();
    int testedCount = testedInvariants.size();
    String percent = toPercentage(failedCount, testedCount);
    System.out.println(
        inv_file
            + ": "
            + failedCount
            + " false positives, out of "
            + testedCount
            + ", which is "
            + percent
            + ".");
    if (false) {
      for (Invariant inv : failedInvariants) {
        System.out.printf("+%s:%s\n", inv.ppt.name(), inv.format());
      }
    }
  }