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//===-- 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/Solver.h"
#include "klee/Solver/SolverImpl.h"
#include "klee/System/Time.h"
#include "llvm/Support/raw_ostream.h"
#include <memory>
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:
std::unique_ptr<Solver> solver;
std::unique_ptr<llvm::raw_ostream> os;
// @brief Buffer used by logBuffer
std::string BufferString;
// @brief buffer to store logs before flushing to file
llvm::raw_string_ostream logBuffer;
unsigned queryCount;
time::Span minQueryTimeToLog; // we log to file only those queries which take longer than the specified time
bool logTimedOutQueries = false;
time::Point startTime;
time::Span lastQueryDuration;
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;
void flushBufferConditionally(bool writeToFile);
public:
QueryLoggingSolver(std::unique_ptr<Solver> solver, std::string path,
const std::string &commentSign, time::Span queryTimeToLog,
bool logTimedOut);
/// 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();
char *getConstraintLog(const Query &);
void setCoreSolverTimeout(time::Span timeout);
};
#endif /* KLEE_QUERYLOGGINGSOLVER_H */
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