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);
}
}
}
}
public void Extract(ModuleDefinition m, ArmadaSymbolTable symbols, List <MemberDecl> newDefaultClassDecls,
List <DatatypeCtor> entryCtors, List <MatchCaseExpr> overallNextCases,
List <MatchCaseExpr> validStepCases, List <MatchCaseExpr> crashAvoidanceCases,
List <MatchCaseExpr> getNextStateCases)
{
if (!valid)
{
return;
}
var entryFormals = new List <Formal> {
AH.MakeFormal("tid", "Armada_ThreadHandle")
};
var commonFormals = new List <Formal> {
AH.MakeFormal("s", "Armada_TotalState"),
AH.MakeFormal("tid", "Armada_ThreadHandle")
};
var overallNextFormals = new List <Formal> {
AH.MakeFormal("s", "Armada_TotalState"),
AH.MakeFormal("s'", "Armada_TotalState"),
AH.MakeFormal("tid", "Armada_ThreadHandle")
};
var caseArguments = new List <BoundVar> {
AH.MakeBoundVar("tid", "Armada_ThreadHandle")
};
var commonMatchBodyArguments = new List <Expression>()
{
AH.MakeNameSegment("s", "Armada_TotalState"),
AH.MakeNameSegment("tid", "Armada_ThreadHandle")
};
var overallNextMatchBodyArguments = new List <Expression>()
{
AH.MakeNameSegment("s", "Armada_TotalState"),
AH.MakeNameSegment("s'", "Armada_TotalState"),
AH.MakeNameSegment("tid", "Armada_ThreadHandle")
};
foreach (var f in formals)
{
var flattened_type = symbols.FlattenType(f.VarType);
commonFormals.Add(AH.MakeFormal(f.LocalVarName, flattened_type));
overallNextFormals.Add(AH.MakeFormal(f.LocalVarName, flattened_type));
entryFormals.Add(AH.MakeFormal(f.GloballyUniqueVarName, flattened_type));
caseArguments.Add(AH.MakeBoundVar(f.LocalVarName, flattened_type));
commonMatchBodyArguments.Add(AH.MakeNameSegment(f.LocalVarName, flattened_type));
overallNextMatchBodyArguments.Add(AH.MakeNameSegment(f.LocalVarName, flattened_type));
}
var nameSuffix = NameSuffix;
var entryName = $"Armada_TraceEntry_{nameSuffix}";
entryCtors.Add(AH.MakeDatatypeCtor(entryName, entryFormals));
var validStepFn = AH.MakeNameSegment($"Armada_ValidStep_{nameSuffix}", (Type)null);
var validStepMatchBody = AH.SetExprType(new ApplySuffix(Token.NoToken, validStepFn, commonMatchBodyArguments), new BoolType());
validStepCases.Add(AH.MakeMatchCaseExpr(entryName, caseArguments, validStepMatchBody));
var validStepPredBody = validStepBuilder.Extract();
var validStepName = $"Armada_ValidStep_{nameSuffix}";
var validStepPred = AH.MakePredicate(validStepName, commonFormals, validStepPredBody);
newDefaultClassDecls.Add(validStepPred);
var crashAvoidanceFn = AH.MakeNameSegment($"Armada_UndefinedBehaviorAvoidance_{nameSuffix}", (Type)null);
var crashAvoidanceMatchBody = AH.SetExprType(new ApplySuffix(Token.NoToken, crashAvoidanceFn, commonMatchBodyArguments), new BoolType());
crashAvoidanceCases.Add(AH.MakeMatchCaseExpr(entryName, caseArguments, crashAvoidanceMatchBody));
var crashAvoidanceName = $"Armada_UndefinedBehaviorAvoidance_{nameSuffix}";
var crashAvoidancePredBody = crashAvoidanceBuilder.Extract();
var crashAvoidancePred = AH.MakePredicateWithReq(crashAvoidanceName, commonFormals, validStepMatchBody, crashAvoidancePredBody);
newDefaultClassDecls.Add(crashAvoidancePred);
var getNextStateFn = AH.MakeNameSegment($"Armada_GetNextState_{nameSuffix}", (Type)null);
var getNextStateMatchBody = AH.SetExprType(new ApplySuffix(Token.NoToken, getNextStateFn, commonMatchBodyArguments), "Armada_TotalState");
getNextStateCases.Add(AH.MakeMatchCaseExpr(entryName, caseArguments, getNextStateMatchBody));
var getNextStateName = $"Armada_GetNextState_{nameSuffix}";
var getNextStateFnBody = getNextStateBuilder.Extract();
var getNextStateReq = AH.MakeAndExpr(validStepMatchBody, crashAvoidanceMatchBody);
var getNextStateFunc = AH.MakeFunctionWithReq(getNextStateName, commonFormals, getNextStateReq, getNextStateFnBody);
newDefaultClassDecls.Add(getNextStateFunc);
// predicate Armada_Next_{nameSuffix}(s:Armada_TotalState, s':Armada_TotalState, ...) {
// && Armada_ValidStep_{nameSuffix}(s, ...)
// && s' == if Armada_UndefinedBehaviorAvoidance(s, ...) then Armada_GetNextState(s, ...)
// else s.(stop_reason := Armada_StopReasonUndefinedBehavior)
// }
var s_with_undefined_behavior =
AH.MakeDatatypeUpdateExpr(s, "stop_reason", AH.MakeNameSegment("Armada_StopReasonUndefinedBehavior", "Armada_StopReason"));
var target_s_prime = AH.MakeIfExpr(crashAvoidanceMatchBody, getNextStateMatchBody, s_with_undefined_behavior);
var s_prime = AH.MakeNameSegment("s'", "Armada_TotalState");
var s_prime_correct = AH.MakeEqExpr(s_prime, target_s_prime);
var overallNextBody = AH.MakeAndExpr(validStepMatchBody, s_prime_correct);
var overallNextName = $"Armada_Next_{nameSuffix}";
var overallNextPred = AH.MakePredicate(overallNextName, overallNextFormals, overallNextBody);
newDefaultClassDecls.Add(overallNextPred);
var overallNextFn = AH.MakeNameSegment(overallNextName, (Type)null);
var overallNextMatchBody = AH.SetExprType(new ApplySuffix(Token.NoToken, overallNextFn, overallNextMatchBodyArguments),
new BoolType());
overallNextCases.Add(AH.MakeMatchCaseExpr(entryName, caseArguments, overallNextMatchBody));
}
