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//===-- SpecialFunctionHandler.h --------------------------------*- C++ -*-===//
//
// The KLEE Symbolic Virtual Machine
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef KLEE_SPECIALFUNCTIONHANDLER_H
#define KLEE_SPECIALFUNCTIONHANDLER_H
#include <iterator>
#include <map>
#include <vector>
#include <string>
namespace llvm {
class Function;
}
namespace klee {
class Executor;
class Expr;
class ExecutionState;
struct KInstruction;
template<typename T> class ref;
class SpecialFunctionHandler {
public:
typedef void (SpecialFunctionHandler::*Handler)(ExecutionState &state,
KInstruction *target,
std::vector<ref<Expr> >
&arguments);
typedef std::map<const llvm::Function*,
std::pair<Handler,bool> > handlers_ty;
handlers_ty handlers;
class Executor &executor;
struct HandlerInfo {
const char *name;
SpecialFunctionHandler::Handler handler;
bool doesNotReturn; /// Intrinsic terminates the process
bool hasReturnValue; /// Intrinsic has a return value
bool doNotOverride; /// Intrinsic should not be used if already defined
};
// const_iterator to iterate over stored HandlerInfo
// FIXME: Implement >, >=, <=, < operators
class const_iterator : public std::iterator<std::random_access_iterator_tag, HandlerInfo>
{
private:
value_type* base;
int index;
public:
const_iterator(value_type* hi) : base(hi), index(0) {};
const_iterator& operator++(); // pre-fix
const_iterator operator++(int); // post-fix
const value_type& operator*() { return base[index];}
const value_type* operator->() { return &(base[index]);}
const value_type& operator[](int i) { return base[i];}
bool operator==(const_iterator& rhs) { return (rhs.base + rhs.index) == (this->base + this->index);}
bool operator!=(const_iterator& rhs) { return !(*this == rhs);}
};
static const_iterator begin();
static const_iterator end();
static int size();
public:
SpecialFunctionHandler(Executor &_executor);
/// Perform any modifications on the LLVM module before it is
/// prepared for execution. At the moment this involves deleting
/// unused function bodies and marking intrinsics with appropriate
/// flags for use in optimizations.
void prepare();
/// Initialize the internal handler map after the module has been
/// prepared for execution.
void bind();
bool handle(ExecutionState &state,
llvm::Function *f,
KInstruction *target,
std::vector< ref<Expr> > &arguments);
/* Convenience routines */
std::string readStringAtAddress(ExecutionState &state, ref<Expr> address);
/* Handlers */
#define HANDLER(name) void name(ExecutionState &state, \
KInstruction *target, \
std::vector< ref<Expr> > &arguments)
HANDLER(handleAbort);
HANDLER(handleAssert);
HANDLER(handleAssertFail);
HANDLER(handleAssume);
HANDLER(handleCalloc);
HANDLER(handleCheckMemoryAccess);
HANDLER(handleDefineFixedObject);
HANDLER(handleDelete);
HANDLER(handleDeleteArray);
HANDLER(handleExit);
HANDLER(handleAliasFunction);
HANDLER(handleFree);
HANDLER(handleGetErrno);
HANDLER(handleGetObjSize);
HANDLER(handleGetValue);
HANDLER(handleIsSymbolic);
HANDLER(handleMakeSymbolic);
HANDLER(handleMalloc);
HANDLER(handleMarkGlobal);
HANDLER(handleMerge);
HANDLER(handleNew);
HANDLER(handleNewArray);
HANDLER(handlePreferCex);
HANDLER(handlePosixPreferCex);
HANDLER(handlePrintExpr);
HANDLER(handlePrintRange);
HANDLER(handleRange);
HANDLER(handleRealloc);
HANDLER(handleReportError);
HANDLER(handleRevirtObjects);
HANDLER(handleSetForking);
HANDLER(handleSilentExit);
HANDLER(handleStackTrace);
HANDLER(handleUnderConstrained);
HANDLER(handleWarning);
HANDLER(handleWarningOnce);
HANDLER(handleAddOverflow);
HANDLER(handleMulOverflow);
HANDLER(handleSubOverflow);
HANDLER(handleDivRemOverflow);
#undef HANDLER
};
} // End klee namespace
#endif
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