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//===-- SMTParser.cpp -----------------------------------------------------===//
//
// The KLEE Symbolic Virtual Machine
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "SMTParser.h"
#include "klee/ExprBuilder.h"
#include "klee/Solver.h"
#include "klee/Constraints.h"
#include "expr/Parser.h"
#include <fstream>
#include <string>
#include <sstream>
#include <cassert>
#include <stack>
//#define DEBUG
using namespace klee;
using namespace klee::expr;
extern int smtlibparse();
extern void *smtlib_createBuffer(int);
extern void smtlib_deleteBuffer(void *);
extern void smtlib_switchToBuffer(void *);
extern int smtlib_bufSize(void);
extern void smtlib_setInteractive(bool);
SMTParser* SMTParser::parserTemp = NULL;
SMTParser::SMTParser(const std::string _filename,
ExprBuilder* _builder) : fileName(_filename),
lineNum(1),
done(false),
satQuery(NULL),
bvSize(0),
queryParsed(false),
builder(_builder) {
is = new ifstream(fileName.c_str());
// Initial empty environments
varEnvs.push(VarEnv());
fvarEnvs.push(FVarEnv());
}
void SMTParser::Parse() {
SMTParser::parserTemp = this;
void *buf = smtlib_createBuffer(smtlib_bufSize());
smtlib_switchToBuffer(buf);
smtlib_setInteractive(false);
smtlibparse();
//xcout << "Parsed successfully.\n";
}
Decl* SMTParser::ParseTopLevelDecl() {
return new QueryCommand(assumptions, builder->Not(satQuery),
std::vector<ExprHandle>(),
std::vector<const Array*>());
}
bool SMTParser::Solve() {
// FIXME: Support choice of solver.
bool UseDummySolver = false, UseFastCexSolver = true, UseSTPQueryPCLog = true;
Solver *S, *STP = S =
UseDummySolver ? createDummySolver() : new STPSolver(true);
if (UseSTPQueryPCLog)
S = createPCLoggingSolver(S, "stp-queries.pc");
if (UseFastCexSolver)
S = createFastCexSolver(S);
S = createCexCachingSolver(S);
S = createCachingSolver(S);
S = createIndependentSolver(S);
if (0)
S = createValidatingSolver(S, STP);
Decl *D = this->ParseTopLevelDecl();
if (QueryCommand *QC = dyn_cast<QueryCommand>(D)) {
//llvm::cout << "Query " << ":\t";
assert("FIXME: Support counterexample query commands!");
if (QC->Values.empty() && QC->Objects.empty()) {
bool result;
if (S->mustBeTrue(Query(ConstraintManager(QC->Constraints), QC->Query),
result)) {
//std::cout << (result ? "VALID" : "INVALID") << "\n";
return result;
}
}
}
llvm::cout << "FAIL";
exit(1);
}
// XXX: give more info
int SMTParser::Error(const string& msg) {
llvm::errs() << SMTParser::parserTemp->fileName << ":"
<< SMTParser::parserTemp->lineNum << ": " << msg << "\n";
exit(1);
return 0;
}
int SMTParser::StringToInt(const std::string& s) {
std::stringstream str(s);
int x;
str >> x;
assert(str);
return x;
}
ExprHandle SMTParser::CreateAnd(std::vector<ExprHandle> kids) {
unsigned n_kids = kids.size();
assert(n_kids);
if (n_kids == 1)
return kids[0];
ExprHandle r = builder->And(kids[n_kids-2], kids[n_kids-1]);
for (int i=n_kids-3; i>=0; i--)
r = builder->And(kids[i], r);
return r;
}
ExprHandle SMTParser::CreateOr(std::vector<ExprHandle> kids) {
unsigned n_kids = kids.size();
assert(n_kids);
if (n_kids == 1)
return kids[0];
ExprHandle r = builder->Or(kids[n_kids-2], kids[n_kids-1]);
for (int i=n_kids-3; i>=0; i--)
r = builder->Or(kids[i], r);
return r;
}
ExprHandle SMTParser::CreateXor(std::vector<ExprHandle> kids) {
unsigned n_kids = kids.size();
assert(n_kids);
if (n_kids == 1)
return kids[0];
ExprHandle r = builder->Xor(kids[n_kids-2], kids[n_kids-1]);
for (int i=n_kids-3; i>=0; i--)
r = builder->Xor(kids[i], r);
return r;
}
void SMTParser::DeclareExpr(std::string name, Expr::Width w) {
// for now, only allow variables which are multiples of 8
if (w % 8 != 0) {
cout << "BitVec not multiple of 8 (" << w << "). Need to update code.\n";
exit(1);
}
#ifdef DEBUG
std::cout << "Declaring " << name << " of width " << w << "\n";
#endif
Array *arr = new Array(name, w / 8);
ref<Expr> *kids = new ref<Expr>[w/8];
for (unsigned i=0; i < w/8; i++)
kids[i] = builder->Read(UpdateList(arr, NULL),
builder->Constant(i, 32));
ref<Expr> var = ConcatExpr::createN(w/8, kids); // XXX: move to builder?
delete [] kids;
AddVar(name, var);
}
ExprHandle SMTParser::GetConstExpr(std::string val, uint8_t base, klee::Expr::Width w) {
assert(base == 2 || base == 10 || base == 16);
llvm::APInt ap(w, val.c_str(), val.length(), base);
return klee::ConstantExpr::alloc(ap);
}
void SMTParser::PushVarEnv() {
#ifdef DEBUG
cout << "Pushing new var env\n";
#endif
varEnvs.push(VarEnv(varEnvs.top()));
}
void SMTParser::PopVarEnv() {
#ifdef DEBUG
cout << "Popping var env\n";
#endif
varEnvs.pop();
}
void SMTParser::AddVar(std::string name, ExprHandle val) {
#ifdef DEBUG
cout << "Adding (" << name << ", " << val << ") to current var env.\n";
#endif
varEnvs.top()[name] = val;
}
ExprHandle SMTParser::GetVar(std::string name) {
VarEnv top = varEnvs.top();
if (top.find(name) == top.end()) {
llvm::errs() << "Cannot find variable ?" << name << "\n";
exit(1);
}
return top[name];
}
void SMTParser::PushFVarEnv() {
fvarEnvs.push(FVarEnv(fvarEnvs.top()));
}
void SMTParser::PopFVarEnv(void) {
#ifdef DEBUG
cout << "Popping fvar env\n";
#endif
fvarEnvs.pop();
}
void SMTParser::AddFVar(std::string name, ExprHandle val) {
#ifdef DEBUG
cout << "Adding (" << name << ", " << val << ") to current fvar env.\n";
#endif
fvarEnvs.top()[name] = val;
}
ExprHandle SMTParser::GetFVar(std::string name) {
FVarEnv top = fvarEnvs.top();
if (top.find(name) == top.end()) {
llvm::errs() << "Cannot find fvar $" << name << "\n";
exit(1);
}
return top[name];
}
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