public static void Remove(Program program)
{
var syns = FindSyn(program);
var vs = new RemoveTypeSynonyms(syns);
vs.VisitProgram(program);
}
static Program Process(Program program)
{
// Get rid of Synonyms
RemoveTypeSynonyms.Remove(program);
//BoogieUtil.PrintProgram(program, "tt.bpl");
program = BoogieUtil.ReResolve(program);
// add "allocator" to malloc
program.TopLevelDeclarations.OfType <Procedure>()
.Where(p => MallocNames.Contains(p.Name))
.Iter(p => p.AddAttribute("allocator"));
// Create "null"
var nil = new Constant(Token.NoToken, new TypedIdent(Token.NoToken, "NULL", btype.Int), false);
nil.AddAttribute("allocated");
// axiom NULL == 0;
var ax = new Axiom(Token.NoToken, Expr.Eq(Expr.Ident(nil), Expr.Literal(0)));
// Convert 0 to NULL in the program
ConvertToNull.Convert(program, nil);
program.AddTopLevelDeclaration(nil);
program.AddTopLevelDeclaration(ax);
// Add "assert !aliasQ(e, NULL)" for each expression M[e] appearing in the program
InstrumentMemoryAccesses.Instrument(program, nil);
// Put {:scalar} {:AllocatorVar} on $CurrAddr
var alloc = program.TopLevelDeclarations.OfType <GlobalVariable>().Where(g => g.Name == allocVar)
.FirstOrDefault();
if (alloc != null)
{
alloc.AddAttribute("scalar");
alloc.AddAttribute(AvUtil.AvnAnnotations.AllocatorVarAttr);
}
else
{
Console.WriteLine("Warning: Global variable $CurrAddr not found");
}
if (initMem)
{
InitMemory(program);
}
return(program);
}
static Program Process(Program program)
{
// Get rid of Synonyms
RemoveTypeSynonyms.Remove(program);
//BoogieUtil.PrintProgram(program, "tt.bpl");
program = BoogieUtil.ReResolveInMem(program, false);
// Create "null"
var nil = new Constant(Token.NoToken, new TypedIdent(Token.NoToken, "NULL", btype.Int), false);
nil.AddAttribute("allocated");
// axiom NULL == 0;
//var ax = new Axiom(Token.NoToken, Expr.Eq(Expr.Ident(nil), Expr.Literal(0)));
program.AddTopLevelDeclaration(nil);
//program.AddTopLevelDeclaration(ax);
// add "allocator" to malloc
program.TopLevelDeclarations.OfType <Procedure>()
.Where(p => MallocNames.Contains(p.Name))
.Iter(p => p.AddAttribute("allocator"));
// inline functions
InlineFunctions(program);
// Add attribute {:fpcondition} to assume cmds in charge of branching in function pointer dispatch procs
var fpAt = new AnnotateFPDispatchProcVisitor();
fpAt.Run(program);
// Add MustReach function calls to the begining of each procedure and upon returns
if (detectDeadCode)
{
var ddc = new SimpleDeadcodeDectectionVisitor();
ddc.Run(program);
}
// if we don't check NULL, stop here
if (!checkNULL && !checkUAF)
{
return(program);
}
if (checkUAF)
{
var iu = new InstrumentUAF();
iu.Instrument(program, nil);
program.AddTopLevelDeclaration(new Axiom(Token.NoToken, Expr.Eq(Expr.Ident(nil), Expr.Literal(0))));
return(program);
}
// Remove literal constants
var CE = new ConstantElimination();
CE.Run(program);
// Convert 0 to NULL in the program
ConvertToNull.Convert(program, nil);
// Add NULL axiom here such that ConvertToNULL doesn't lead to dumb axiom
var ax = new Axiom(Token.NoToken, Expr.Eq(Expr.Ident(nil), Expr.Literal(0)));
program.AddTopLevelDeclaration(ax);
// Add "assert !aliasQ(e, NULL)" for each expression M[e] appearing in the program
InstrumentMemoryAccesses.Instrument(program, nil);
// Put {:scalar} {:AllocatorVar} on $CurrAddr
var alloc = program.TopLevelDeclarations.OfType <GlobalVariable>().Where(g => g.Name == allocVar)
.FirstOrDefault();
if (alloc != null)
{
//alloc.AddAttribute("scalar");
alloc.AddAttribute(AvUtil.AvnAnnotations.AllocatorVarAttr);
}
else
{
Console.WriteLine("Warning: Global variable $CurrAddr not found");
}
if (initMem)
{
InitMemory(program);
}
return(program);
}
