2 files changed, 263 insertions, 0 deletions
diff --git a/lib/Solver/QueryLoggingSolver.cpp b/lib/Solver/QueryLoggingSolver.cpp
new file mode 100644
index 00000000..245ad3bf
--- /dev/null
+++ b/lib/Solver/QueryLoggingSolver.cpp
@@ -0,0 +1,186 @@
+//===-- QueryLoggingSolver.cpp --------------------------------------------===//
+
+#include "QueryLoggingSolver.h"
+#include "klee/Internal/System/Time.h"
+#include "klee/Statistics.h"
+
+//
+//                     The KLEE Symbolic Virtual Machine
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+using namespace klee::util;
+
+QueryLoggingSolver::QueryLoggingSolver(Solver *_solver,
+                                       std::string path,
+                                       const std::string& commentSign,
+                                       int queryTimeToLog)                                  
+    : solver(_solver), 
+      os(path.c_str(), std::ios::trunc),
+      logBuffer(""),
+      queryCount(0),    
+      minQueryTimeToLog(queryTimeToLog),
+      startTime(0.0f),
+      lastQueryTime(0.0f),
+      queryCommentSign(commentSign) {
+    assert(0 != solver);
+}
+
+QueryLoggingSolver::~QueryLoggingSolver() {
+    delete solver;
+}
+
+void QueryLoggingSolver::startQuery(const Query& query, const char* typeName,
+                                    const Query* falseQuery,
+                                    const std::vector<const Array*> *objects) {
+    Statistic *S = theStatisticManager->getStatisticByName("Instructions");
+    uint64_t instructions = S ? S->getValue() : 0;
+
+    logBuffer << queryCommentSign << " Query " << queryCount++ << " -- "
+              << "Type: " << typeName << ", "
+              << "Instructions: " << instructions << "\n";
+    
+    printQuery(query, falseQuery, objects);
+    
+    startTime = getWallTime();
+    
+}
+
+void QueryLoggingSolver::finishQuery(bool success) {
+    lastQueryTime = getWallTime() - startTime;
+    logBuffer << queryCommentSign << "   " << (success ? "OK" : "FAIL") << " -- "
+              << "Elapsed: " << lastQueryTime << "\n";
+    
+    if (false == success) {
+        logBuffer << queryCommentSign << "   Failure reason: "
+                  << SolverImpl::getOperationStatusString(solver->impl->getOperationStatusCode())
+                  << "\n";
+    }
+}
+
+void QueryLoggingSolver::flushBuffer() {
+    logBuffer.flush();            
+
+      if ((0 == minQueryTimeToLog) ||
+          (static_cast<int>(lastQueryTime * 1000) > minQueryTimeToLog)) {
+          // we either do not limit logging queries or the query time
+          // is larger than threshold (in ms)
+          
+          if ((minQueryTimeToLog >= 0) || 
+              (SOLVER_RUN_STATUS_TIMEOUT == (solver->impl->getOperationStatusCode()))) {
+              // we do additional check here to log only timeouts in case
+              // user specified negative value for minQueryTimeToLog param
+              os << logBuffer.str();              
+          }                    
+      }
+      
+      // prepare the buffer for reuse
+      logBuffer.clear();
+      logBuffer.str("");
+}
+
+bool QueryLoggingSolver::computeTruth(const Query& query, bool& isValid) {
+    startQuery(query, "Truth");
+    
+    bool success = solver->impl->computeTruth(query, isValid);
+    
+    finishQuery(success);
+    
+    if (success) {
+        logBuffer << queryCommentSign << "   Is Valid: " 
+                  << (isValid ? "true" : "false") << "\n";
+    }
+    logBuffer << "\n";
+    
+    flushBuffer();
+    
+    return success;    
+}
+
+bool QueryLoggingSolver::computeValidity(const Query& query,
+                                         Solver::Validity& result) {
+    startQuery(query, "Validity");
+    
+    bool success = solver->impl->computeValidity(query, result);
+    
+    finishQuery(success);
+    
+    if (success) {
+        logBuffer << queryCommentSign << "   Validity: " 
+                  << result << "\n";
+    }
+    logBuffer << "\n";
+    
+    flushBuffer();
+    
+    return success;
+}
+
+bool QueryLoggingSolver::computeValue(const Query& query, ref<Expr>& result) {
+    Query withFalse = query.withFalse();
+    startQuery(query, "Value", &withFalse);
+
+    bool success = solver->impl->computeValue(query, result);
+    
+    finishQuery(success);
+    
+    if (success) {
+        logBuffer << queryCommentSign << "   Result: " << result << "\n";
+    }
+    logBuffer << "\n";
+    
+    flushBuffer();
+    
+    return success;
+}
+
+bool QueryLoggingSolver::computeInitialValues(const Query& query,
+                                              const std::vector<const Array*>& objects,
+                                              std::vector<std::vector<unsigned char> >& values,
+                                              bool& hasSolution) {
+    startQuery(query, "InitialValues", 0, &objects);
+
+    bool success = solver->impl->computeInitialValues(query, objects, 
+                                                      values, hasSolution);
+    
+    finishQuery(success);
+    
+    if (success) {
+        logBuffer << queryCommentSign << "   Solvable: " 
+                  << (hasSolution ? "true" : "false") << "\n";
+        if (hasSolution) {
+            std::vector< std::vector<unsigned char> >::iterator
+            values_it = values.begin();
+        
+            for (std::vector<const Array*>::const_iterator i = objects.begin(),
+                 e = objects.end(); i != e; ++i, ++values_it) {
+                const Array *array = *i;
+                std::vector<unsigned char> &data = *values_it;
+                logBuffer << queryCommentSign << "     " << array->name << " = [";
+                
+                for (unsigned j = 0; j < array->size; j++) {
+                    logBuffer << (int) data[j];
+            
+                    if (j+1 < array->size) {
+                        logBuffer << ",";
+                    }                    
+              }
+              logBuffer << "]\n";
+            }
+        }
+    }
+    logBuffer << "\n";
+    
+    flushBuffer();
+    
+    return success;
+}
+
+SolverImpl::SolverRunStatus QueryLoggingSolver::getOperationStatusCode() {
+    return solver->impl->getOperationStatusCode();
+}
+
+
diff --git a/lib/Solver/QueryLoggingSolver.h b/lib/Solver/QueryLoggingSolver.h
new file mode 100644
index 00000000..527d075b
--- /dev/null
+++ b/lib/Solver/QueryLoggingSolver.h
@@ -0,0 +1,77 @@
+//===-- QueryLoggingSolver.h ---------------------------------------------------===//
+//
+//                     The KLEE Symbolic Virtual Machine
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef KLEE_QUERYLOGGINGSOLVER_H
+#define	KLEE_QUERYLOGGINGSOLVER_H
+
+#include "klee/Solver.h"
+#include "klee/SolverImpl.h"
+#include <fstream>
+#include <sstream>
+
+using namespace klee;
+
+/// This abstract class represents a solver that is capable of logging 
+/// queries to a file.
+/// Derived classes might specialize this one by providing different formats
+/// for the query output.
+class QueryLoggingSolver : public SolverImpl {
+
+protected:
+    Solver *solver;
+    std::ofstream os;
+    std::ostringstream logBuffer; // buffer to store logs before flushing to 
+                                  // file
+    unsigned queryCount;
+    int minQueryTimeToLog; // we log to file only those queries
+                           // which take longer than the specified time (ms);
+                           // if this param is negative, log only those queries
+                           // on which the solver has timed out
+
+    double startTime;
+    double lastQueryTime;
+    const std::string queryCommentSign; // sign representing commented lines
+                                        // in given a query format
+
+    virtual void startQuery(const Query& query, const char* typeName,
+                            const Query* falseQuery = 0,
+                            const std::vector<const Array*>* objects = 0);
+           
+    virtual void finishQuery(bool success);        
+  
+    /// flushBuffer - flushes the temporary logs buffer. Depending on threshold
+    /// settings, contents of the buffer are either discarded or written to a file.  
+    void flushBuffer(void);
+    
+    virtual void printQuery(const Query& query,
+                            const Query* falseQuery = 0,
+                            const std::vector<const Array*>* objects = 0) = 0;
+  
+public:
+    QueryLoggingSolver(Solver *_solver,
+                       std::string path,
+                       const std::string& commentSign,
+                       int queryTimeToLog);
+  
+    virtual ~QueryLoggingSolver();
+
+    /// implementation of the SolverImpl interface
+    bool computeTruth(const Query& query, bool &isValid);
+    bool computeValidity(const Query& query, Solver::Validity &result);
+    bool computeValue(const Query& query, ref<Expr> &result);
+    bool computeInitialValues(const Query& query,
+                              const std::vector<const Array*> &objects,
+                              std::vector< std::vector<unsigned char> > &values,
+                              bool &hasSolution);
+    SolverRunStatus getOperationStatusCode();
+
+};
+
+#endif	/* KLEE_QUERYLOGGINGSOLVER_H */
+