public override ArmadaRValue GetRValue(IToken tok, ResolutionContext context)
{
var top = context.GetRValueTopStackFrame();
var correct_frame_type = AH.MakeExprDotName(top, $"Armada_StackFrame_{methodName}?", new BoolType());
var crashAvoidance = new UndefinedBehaviorAvoidanceConstraint(correct_frame_type);
var addr = AH.MakeExprDotName(top, $"{methodName}'AddrOf'{name}", new PointerType(ty));
var h = context.GetRValueHeap();
var valid = AH.GetInvocationOfValidPointer(h, addr, ty);
if (valid == null)
{
context.Fail(tok, "Type {ty} is not supported on the heap, and thus not for addressable stack variables either");
return(null);
}
crashAvoidance.Add(valid);
var val = AH.GetInvocationOfDereferencePointer(h, addr, ty);
if (val == null)
{
context.Fail(tok, "Type {ty} is not supported on the heap, and thus not for addressable stack variables either");
}
return(new ArmadaRValue(crashAvoidance, val));
}
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 ArmadaRValue GetRValue(IToken tok, ResolutionContext context)
{
var s = context.GetRValueState();
var addrs = AH.MakeExprDotName(s, "addrs", "Armada_Addrs");
var addr = AH.MakeExprDotName(addrs, name, new PointerType(ty));
var h = context.GetRValueHeap();
var valid = AH.GetInvocationOfValidPointer(h, addr, ty);
if (valid == null)
{
context.Fail(tok, "Type {ty} is currently not supported in the heap");
return(null);
}
var crashAvoidance = new UndefinedBehaviorAvoidanceConstraint(valid);
var val = AH.GetInvocationOfDereferencePointer(h, addr, ty);
if (val == null)
{
context.Fail(tok, "Type {ty} is currently not supported in the heap");
}
return(new ArmadaRValue(crashAvoidance, val));
}
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, non-datatype type {type}");
return(null);
}
UserDefinedType ut = (UserDefinedType)type;
if (context.symbols.DoesStructExist(ut.Name))
{
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);
}
}
return(new UnaddressableFieldArmadaLValue(i_tok, ty, this, crashAvoidance, fieldName, false));
}
public override ArmadaLValue ApplySeqSelect(IToken i_tok, ResolutionContext context, ArmadaRValue idx1, Type indexType, Type exprType)
{
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, exprType))
{
context.Fail(i_tok, $"Element of type {st.Range} used as type {exprType}");
return(null);
}
var crashAvoidance = address.UndefinedBehaviorAvoidance + idx1.UndefinedBehaviorAvoidance;
var s = context.GetLValueState();
var h = $"({s}).mem.heap";
var idx1_as_int = AH.ConvertToIntIfNotInt(idx1.Val, indexType);
crashAvoidance.Add($"{address.Val} in {h}.tree");
crashAvoidance.Add($"0 <= {idx1_as_int} < |{h}.tree[{address.Val}].children|");
var child = $"{h}.tree[{address.Val}].children[{idx1_as_int}]";
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 ArmadaRValue GetRValue(IToken tok, ResolutionContext context)
{
var addr = $"({context.GetRValueState()}).addrs.{name}";
var h = context.GetRValueHeap();
var valid = AH.GetInvocationOfValidPointer(h, addr, ty);
if (valid == null)
{
context.Fail(tok, $"Type {ty} is currently not supported in the heap");
return(null);
}
var crashAvoidance = new UndefinedBehaviorAvoidanceConstraint(valid);
var val = AH.GetInvocationOfDereferencePointer(h, addr, ty);
if (val == null)
{
context.Fail(tok, $"Type {ty} is currently not supported in the heap");
}
return(new ArmadaRValue(crashAvoidance, val));
}
public override ArmadaLValue ApplySeqSelect(IToken i_tok, ResolutionContext context, ArmadaRValue idx1, Type indexType, Type exprType)
{
var me = GetValueInLValueState(context);
var sz = $"|{me}|";
var newUndefinedBehaviorAvoidance = GetUndefinedBehaviorAvoidanceConstraint() + idx1.UndefinedBehaviorAvoidance;
var idx1val = AH.ConvertToIntIfNotInt(idx1.Val, indexType);
if (type is SizedArrayType)
{
SizedArrayType st = (SizedArrayType)type;
if (!AH.TypesMatch(st.Range, exprType))
{
context.Fail(i_tok, $"Element of type {st.Range} used as type {exprType}");
return(null);
}
newUndefinedBehaviorAvoidance.Add($"0 <= {idx1val} < {sz}");
}
else if (type is SeqType)
{
newUndefinedBehaviorAvoidance.Add($"0 <= {idx1val} < {sz}");
}
else if (type is MapType)
{
// There's no need to consider it undefined behavior if idx1.Val isn't in this map, since we're just
// using it as an lvalue. It's fine to update an element of a map that isn't yet in its domain.
// So we don't need to do:
// newUndefinedBehaviorAvoidance.Add($"({idx1.Val}) in ({me})");
return(new UnaddressableIndexArmadaLValue(i_tok, exprType, this, newUndefinedBehaviorAvoidance, idx1.Val));
}
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, exprType, this, newUndefinedBehaviorAvoidance, idx1val));
}
public override ArmadaLValue ApplyExprDotName(IToken i_tok, ResolutionContext context, string fieldName, Type targetType)
{
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, targetType))
{
context.Fail(i_tok, $"Field {fieldName} of type {fieldType} used as type {targetType}");
return(null);
}
var crashAvoidance = address.UndefinedBehaviorAvoidance;
var s = context.GetLValueState();
var h = $"({s}).mem.heap";
int fieldPos = context.symbols.GetStructFieldPos(ut.Name, fieldName);
crashAvoidance.Add($"{address.Val} in {h}.tree");
crashAvoidance.Add($"0 <= {fieldPos} < |{h}.tree[{address.Val}].children|");
var child = $"{h}.tree[{address.Val}].children[{fieldPos}]";
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 override ArmadaRValue GetRValue(IToken tok, ResolutionContext context)
{
var crashAvoidance = new UndefinedBehaviorAvoidanceConstraint();
var addr = $"({context.GetRValueTopStackFrame()}).{methodName}.AddrOf'{name}";
var h = context.GetRValueHeap();
var valid = AH.GetInvocationOfValidPointer(h, addr, ty);
if (valid == null)
{
context.Fail(tok, $"Type {ty} is not supported on the heap, and thus not for addressable stack variables either");
return(null);
}
crashAvoidance.Add(valid);
var val = AH.GetInvocationOfDereferencePointer(h, addr, ty);
if (val == null)
{
context.Fail(tok, $"Type {ty} is not supported on the heap, and thus not for addressable stack variables either");
}
return(new ArmadaRValue(crashAvoidance, val));
}
public Expression UpdateTotalStateWithStoreBufferEntry(ResolutionContext context, IConstraintCollector constraintCollector,
Expression val_new)
{
if (NoTSO())
{
return(UpdateTotalStateLocationDirectly(context, constraintCollector, val_new));
}
if (!AH.IsPrimitiveType(type))
{
context.Fail(tok, "Can't do TSO write to non-primitive type; try using ::= instead of :=");
return(null);
}
var entry = GetStoreBufferEntry(val_new);
if (entry == null)
{
context.Fail(tok, "Can't do a TSO write to that location; try using ::= instead of :=");
return(null);
}
return(AH.MakeApply3("Armada_AppendToThreadStoreBuffer", context.GetLValueState(), context.tid, entry, "Armada_TotalState"));
}
public string UpdateTotalStateWithStoreBufferEntry(ResolutionContext context, IConstraintCollector constraintCollector,
string val_new, ArmadaPC pc)
{
if (NoTSO())
{
return(UpdateTotalStateLocationDirectly(context, constraintCollector, val_new));
}
if (!AH.IsPrimitiveType(type))
{
context.Fail(tok, "Can't do TSO write to non-primitive type; try using ::= instead of :=");
return(null);
}
var entry = GetStoreBufferEntry(val_new, pc);
if (entry == null)
{
context.Fail(tok, "Can't do a TSO write to that location; try using ::= instead of :=");
return(null);
}
return($"Armada_AppendToThreadStoreBuffer({context.GetLValueState()}, {context.tid}, {entry})");
}
public virtual Expression GetValueInLValueState(ResolutionContext context)
{
context.Fail("Internal error: GetValueInLValueState not supported");
return(null);
}
