Exemplo n.º 1
0
        public NextRoutine(Program i_prog, ArmadaSymbolTable i_symbols, NextType i_nextType, MethodInfo methodInfo,
                           ArmadaStatement i_armadaStatement, Statement i_stmt, ArmadaPC i_pc, ArmadaPC i_endPC)
        {
            prog                  = i_prog;
            symbols               = i_symbols;
            nextType              = i_nextType;
            validStepBuilder      = new PredicateBuilder(i_prog);
            crashAvoidanceBuilder = new PredicateBuilder(i_prog);
            getNextStateBuilder   = new ExpressionBuilder(i_prog);
            method                = methodInfo != null ? methodInfo.method : null;
            armadaStatement       = i_armadaStatement;
            stmt                  = i_stmt;
            pc      = i_pc;
            endPC   = i_endPC;
            formals = new List <NextFormal>();
            valid   = true;

            s    = ReserveVariableName("s", "Armada_TotalState");
            tid  = ReserveVariableName("tid", "Armada_ThreadHandle");
            locv = null;

            // s.stop_reason.Armada_NotStopped?
            var stop_reason = AH.MakeExprDotName(s, "stop_reason", "Armada_StopReason");
            var not_stopped = AH.MakeExprDotName(stop_reason, "Armada_NotStopped?", new BoolType());

            AddConjunct(not_stopped);

            // tid in s.threads
            var threads        = AH.MakeExprDotName(s, "threads", AH.MakeThreadsType());
            var tid_in_threads = AH.MakeInExpr(tid, threads);

            AddConjunct(tid_in_threads);

            // var t := s.threads[tid];
            t = AddVariableDeclaration("t", AH.MakeSeqSelectExpr(threads, tid, "Armada_Thread"));

            // var locv := Armada_GetThreadLocalView(s, tid);
            locv = AH.MakeApply2("Armada_GetThreadLocalView", s, tid, "Armada_SharedMemory");
            locv = AddVariableDeclaration("locv", locv);

            if (pc != null)
            {
                var current_pc = AH.MakeExprDotName(t, "pc", "Armada_PC");
                var pc_correct = AH.MakeEqExpr(current_pc, AH.MakeNameSegment(pc.ToString(), "Armada_PC"));
                AddConjunct(pc_correct);

                // t.top.Armada_StackFrame_{methodName}?
                var top = AH.MakeExprDotName(t, "top", "Armada_StackFrame");
                var top_frame_correct = AH.MakeExprDotName(top, $"Armada_StackFrame_{pc.methodName}?", new BoolType());
                AddConjunct(top_frame_correct);

                if (methodInfo != null)
                {
                    var constraints = methodInfo.GetEnablingConstraintCollector(pc);
                    if (constraints != null && !constraints.Empty)
                    {
                        var enabling_condition = AH.MakeApply2($"Armada_EnablingConditions_{pc}", s, tid, new BoolType());
                        AddConjunct(enabling_condition);
                    }
                }
            }
        }