public override ArmadaLValue ApplySeqSelect(IToken i_tok, ResolutionContext context, ArmadaRValue idx1, Type ty)
{
if (!(type is SizedArrayType))
{
context.Fail(i_tok, "Attempt to obtain element of non-array type");
return(null);
}
SizedArrayType st = (SizedArrayType)type;
if (!AH.TypesMatch(st.Range, ty))
{
context.Fail(i_tok, $"Element of type {st.Range} used as type {ty}");
return(null);
}
var crashAvoidance = address.UndefinedBehaviorAvoidance + idx1.UndefinedBehaviorAvoidance;
var s = context.GetLValueState();
var mem = AH.MakeExprDotName(s, "mem", "Armada_SharedMemory");
var h = AH.MakeExprDotName(mem, "heap", "Armada_Heap");
var tree = AH.MakeExprDotName(h, "tree", "Armada_Tree");
crashAvoidance.Add(AH.MakeInExpr(address.Val, tree));
var node = AH.MakeSeqSelectExpr(tree, address.Val, "Armada_Node");
var children = AH.MakeExprDotName(node, "children", AH.MakeChildrenType());
var idx1_as_int = AH.ConvertToIntIfNotInt(idx1.Val);
var field = AH.MakeApply1("Armada_FieldArrayIndex", idx1_as_int, "Armada_Field");
var child = AH.MakeSeqSelectExpr(children, field, new PointerType(st.Range));
crashAvoidance.Add(AH.MakeInExpr(field, children));
return(new AddressableArmadaLValue(i_tok, st.Range, new ArmadaRValue(crashAvoidance, child)));
}
public override ArmadaLValue ApplyExprDotName(IToken i_tok, ResolutionContext context, string fieldName, Type ty)
{
if (!(type is UserDefinedType))
{
context.Fail(i_tok, $"Attempt to take a field ({fieldName}) of non-struct type {type}");
return(null);
}
UserDefinedType ut = (UserDefinedType)type;
if (!context.symbols.DoesStructExist(ut.Name))
{
context.Fail(i_tok, $"Attempt to take a field ({fieldName}) of non struct type {ut.Name}");
return(null);
}
Type fieldType = context.symbols.GetStructFieldType(ut.Name, fieldName);
if (fieldType == null)
{
context.Fail(i_tok, $"Attempt to take non-existent field ({fieldName}) in struct type {ut.Name}");
return(null);
}
if (!AH.TypesMatch(fieldType, ty))
{
context.Fail(i_tok, $"Field {fieldName} of type {fieldType} used as type {ty}");
return(null);
}
var crashAvoidance = address.UndefinedBehaviorAvoidance;
var s = context.GetLValueState();
var mem = AH.MakeExprDotName(s, "mem", "Armada_SharedMemory");
var h = AH.MakeExprDotName(mem, "heap", "Armada_Heap");
var tree = AH.MakeExprDotName(h, "tree", "Armada_Tree");
crashAvoidance.Add(AH.MakeInExpr(address.Val, tree));
var node = AH.MakeSeqSelectExpr(tree, address.Val, "Armada_Node");
var children = AH.MakeExprDotName(node, "children", AH.MakeChildrenType());
var field = AH.MakeApply1("Armada_FieldStruct",
AH.MakeNameSegment($"Armada_FieldType_{ut.Name}'{fieldName}", "Armada_FieldType"),
"Armada_Field");
var child = AH.MakeSeqSelectExpr(children, field, new PointerType(fieldType));
crashAvoidance.Add(AH.MakeInExpr(field, children));
return(new AddressableArmadaLValue(i_tok, fieldType, new ArmadaRValue(crashAvoidance, child)));
}
public override ArmadaLValue ApplySeqSelect(IToken i_tok, ResolutionContext context, ArmadaRValue idx1, Type ty)
{
var me = GetValueInLValueState(context);
var sz = AH.MakeCardinalityExpr(me);
var newUndefinedBehaviorAvoidance = GetUndefinedBehaviorAvoidanceConstraint() + idx1.UndefinedBehaviorAvoidance;
var idx1val = AH.ConvertToIntIfNotInt(idx1.Val);
if (type is SizedArrayType)
{
SizedArrayType st = (SizedArrayType)type;
if (!AH.TypesMatch(st.Range, ty))
{
context.Fail(i_tok, $"Element of type {st.Range} used as type {ty}");
return(null);
}
newUndefinedBehaviorAvoidance.Add(AH.MakeLeExpr(AH.MakeZero(), idx1val));
newUndefinedBehaviorAvoidance.Add(AH.MakeLtExpr(idx1val, sz));
}
else if (type is SeqType)
{
newUndefinedBehaviorAvoidance.Add(AH.MakeLeExpr(AH.MakeZero(), idx1val));
newUndefinedBehaviorAvoidance.Add(AH.MakeLtExpr(idx1val, sz));
}
else if (type is MapType)
{
newUndefinedBehaviorAvoidance.Add(AH.MakeInExpr(idx1val, me));
}
else
{
context.Fail(i_tok, $"Attempt to index into something that isn't an array, seq, or map");
return(null);
}
return(new UnaddressableIndexArmadaLValue(i_tok, ty, this, newUndefinedBehaviorAvoidance, idx1val));
}
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);
}
}
}
}