public static StateMachineStatesDebugInfo Create(VariableSlotAllocator?variableSlotAllocator, ImmutableArray <StateMachineStateDebugInfo> stateInfos)
{
StateMachineState?firstUnusedIncreasingStateMachineState = null, firstUnusedDecreasingStateMachineState = null;
if (variableSlotAllocator != null)
{
// We start with first unused state numbers from the previous generation and update them based on states generated in the current one.
firstUnusedIncreasingStateMachineState = variableSlotAllocator.GetFirstUnusedStateMachineState(increasing: true);
firstUnusedDecreasingStateMachineState = variableSlotAllocator.GetFirstUnusedStateMachineState(increasing: false);
if (!stateInfos.IsDefaultOrEmpty)
{
// The current method is a state machine and has some resumable/finalization states.
// Update the first unused states based on the highest resumable (positive numbers) and lowest finalization (negative numbers) of this method.
var maxState = stateInfos.Max(info => info.StateNumber) + 1;
var minState = stateInfos.Min(info => info.StateNumber) - 1;
firstUnusedIncreasingStateMachineState = (firstUnusedIncreasingStateMachineState != null) ? (StateMachineState)Math.Max((int)firstUnusedIncreasingStateMachineState.Value, (int)maxState) : maxState;
if (minState < 0)
{
firstUnusedDecreasingStateMachineState = (firstUnusedDecreasingStateMachineState != null) ? (StateMachineState)Math.Min((int)firstUnusedDecreasingStateMachineState.Value, (int)minState) : minState;
}
}
}
return(new StateMachineStatesDebugInfo(
stateInfos,
firstUnusedIncreasingStateMachineState,
firstUnusedDecreasingStateMachineState));
}
public EncVariableSlotAllocator(
SymbolMatcher symbolMap,
Func <SyntaxNode, SyntaxNode?>?syntaxMap,
IMethodSymbolInternal previousTopLevelMethod,
DebugId methodId,
ImmutableArray <EncLocalInfo> previousLocals,
IReadOnlyDictionary <int, KeyValuePair <DebugId, int> >?lambdaMap,
IReadOnlyDictionary <int, DebugId>?closureMap,
string?stateMachineTypeName,
int hoistedLocalSlotCount,
IReadOnlyDictionary <EncHoistedLocalInfo, int>?hoistedLocalSlots,
int awaiterCount,
IReadOnlyDictionary <Cci.ITypeReference, int>?awaiterMap,
IReadOnlyDictionary <int, StateMachineState>?stateMachineStateMap,
StateMachineState?firstUnusedIncreasingStateMachineState,
StateMachineState?firstUnusedDecreasingStateMachineState,
LambdaSyntaxFacts lambdaSyntaxFacts)
{
Debug.Assert(!previousLocals.IsDefault);
_symbolMap = symbolMap;
_syntaxMap = syntaxMap;
_previousLocals = previousLocals;
_previousTopLevelMethod = previousTopLevelMethod;
_methodId = methodId;
_hoistedLocalSlots = hoistedLocalSlots;
_hoistedLocalSlotCount = hoistedLocalSlotCount;
_stateMachineTypeName = stateMachineTypeName;
_awaiterCount = awaiterCount;
_awaiterMap = awaiterMap;
_stateMachineStateMap = stateMachineStateMap;
_lambdaMap = lambdaMap;
_closureMap = closureMap;
_lambdaSyntaxFacts = lambdaSyntaxFacts;
_firstUnusedIncreasingStateMachineState = firstUnusedIncreasingStateMachineState;
_firstUnusedDecreasingStateMachineState = firstUnusedDecreasingStateMachineState;
// Create a map from local info to slot.
var previousLocalInfoToSlot = new Dictionary <EncLocalInfo, int>();
for (int slot = 0; slot < previousLocals.Length; slot++)
{
var localInfo = previousLocals[slot];
Debug.Assert(!localInfo.IsDefault);
if (localInfo.IsUnused)
{
// Unrecognized or deleted local.
continue;
}
previousLocalInfoToSlot.Add(localInfo, slot);
}
_previousLocalSlots = previousLocalInfoToSlot;
}
/// <summary>
/// Get an existing StateMachine resource's state with the given name, ID, and optional extra
/// properties used to qualify the lookup.
/// </summary>
///
/// <param name="name">The unique name of the resulting resource.</param>
/// <param name="id">The unique provider ID of the resource to lookup.</param>
/// <param name="state">Any extra arguments used during the lookup.</param>
/// <param name="options">A bag of options that control this resource's behavior</param>
public static StateMachine Get(string name, Input <string> id, StateMachineState?state = null, CustomResourceOptions?options = null)
{
return(new StateMachine(name, id, state, options));
}
private StateMachine(string name, Input <string> id, StateMachineState?state = null, CustomResourceOptions?options = null)
: base("aws:sfn/stateMachine:StateMachine", name, state, MakeResourceOptions(options, id))
{
}
private StateMachineStatesDebugInfo(ImmutableArray <StateMachineStateDebugInfo> states, StateMachineState?firstUnusedIncreasingStateMachineState, StateMachineState?firstUnusedDecreasingStateMachineState)
{
States = states;
FirstUnusedIncreasingStateMachineState = firstUnusedIncreasingStateMachineState;
FirstUnusedDecreasingStateMachineState = firstUnusedDecreasingStateMachineState;
}
internal VariableSlotAllocator?TryCreateVariableSlotAllocator(EmitBaseline baseline, Compilation compilation, IMethodSymbolInternal method, IMethodSymbolInternal topLevelMethod, DiagnosticBag diagnostics)
{
// Top-level methods are always included in the semantic edit list. Lambda methods are not.
if (!mappedMethods.TryGetValue(topLevelMethod, out var mappedMethod))
{
return(null);
}
// TODO (bug https://github.com/dotnet/roslyn/issues/2504):
// Handle cases when the previous method doesn't exist.
if (!TryGetMethodHandle(baseline, (Cci.IMethodDefinition)method.GetCciAdapter(), out var previousHandle))
{
// Unrecognized method. Must have been added in the current compilation.
return(null);
}
ImmutableArray <EncLocalInfo> previousLocals;
IReadOnlyDictionary <EncHoistedLocalInfo, int>? hoistedLocalMap = null;
IReadOnlyDictionary <Cci.ITypeReference, int>? awaiterMap = null;
IReadOnlyDictionary <int, KeyValuePair <DebugId, int> >?lambdaMap = null;
IReadOnlyDictionary <int, DebugId>? closureMap = null;
IReadOnlyDictionary <int, StateMachineState>?stateMachineStateMap = null;
StateMachineState?firstUnusedIncreasingStateMachineState = null;
StateMachineState?firstUnusedDecreasingStateMachineState = null;
int hoistedLocalSlotCount = 0;
int awaiterSlotCount = 0;
string? stateMachineTypeName = null;
SymbolMatcher symbolMap;
int methodIndex = MetadataTokens.GetRowNumber(previousHandle);
DebugId methodId;
// Check if method has changed previously. If so, we already have a map.
if (baseline.AddedOrChangedMethods.TryGetValue(methodIndex, out var addedOrChangedMethod))
{
methodId = addedOrChangedMethod.MethodId;
MakeLambdaAndClosureMaps(addedOrChangedMethod.LambdaDebugInfo, addedOrChangedMethod.ClosureDebugInfo, out lambdaMap, out closureMap);
MakeStateMachineStateMap(addedOrChangedMethod.StateMachineStates.States, out stateMachineStateMap);
firstUnusedIncreasingStateMachineState = addedOrChangedMethod.StateMachineStates.FirstUnusedIncreasingStateMachineState;
firstUnusedDecreasingStateMachineState = addedOrChangedMethod.StateMachineStates.FirstUnusedDecreasingStateMachineState;
if (addedOrChangedMethod.StateMachineTypeName != null)
{
// method is async/iterator kickoff method
GetStateMachineFieldMapFromPreviousCompilation(
addedOrChangedMethod.StateMachineHoistedLocalSlotsOpt,
addedOrChangedMethod.StateMachineAwaiterSlotsOpt,
out hoistedLocalMap,
out awaiterMap);
hoistedLocalSlotCount = addedOrChangedMethod.StateMachineHoistedLocalSlotsOpt.Length;
awaiterSlotCount = addedOrChangedMethod.StateMachineAwaiterSlotsOpt.Length;
// Kickoff method has no interesting locals on its own.
// We use the EnC method debug information for hoisted locals.
previousLocals = ImmutableArray <EncLocalInfo> .Empty;
stateMachineTypeName = addedOrChangedMethod.StateMachineTypeName;
}
else
{
previousLocals = addedOrChangedMethod.Locals;
}
// All types that AddedOrChangedMethodInfo refers to have been mapped to the previous generation.
// Therefore we don't need to fall back to metadata if we don't find the type reference, like we do in DefinitionMap.MapReference.
symbolMap = MapToPreviousSymbolMatcher;
}
else
{
// Method has not changed since initial generation. Generate a map
// using the local names provided with the initial metadata.
EditAndContinueMethodDebugInformation debugInfo;
StandaloneSignatureHandle localSignature;
try
{
debugInfo = baseline.DebugInformationProvider(previousHandle);
localSignature = baseline.LocalSignatureProvider(previousHandle);
}
catch (Exception e) when(e is InvalidDataException || e is IOException)
{
diagnostics.Add(MessageProvider.CreateDiagnostic(
MessageProvider.ERR_InvalidDebugInfo,
method.Locations.First(),
method,
MetadataTokens.GetToken(previousHandle),
method.ContainingAssembly
));
return(null);
}
methodId = new DebugId(debugInfo.MethodOrdinal, 0);
if (!debugInfo.Lambdas.IsDefaultOrEmpty)
{
MakeLambdaAndClosureMaps(debugInfo.Lambdas, debugInfo.Closures, out lambdaMap, out closureMap);
}
MakeStateMachineStateMap(debugInfo.StateMachineStates, out stateMachineStateMap);
if (!debugInfo.StateMachineStates.IsDefaultOrEmpty)
{
firstUnusedIncreasingStateMachineState = debugInfo.StateMachineStates.Max(s => s.StateNumber) + 1;
firstUnusedDecreasingStateMachineState = debugInfo.StateMachineStates.Min(s => s.StateNumber) - 1;
}
ITypeSymbolInternal?stateMachineType = TryGetStateMachineType(previousHandle);
if (stateMachineType != null)
{
// method is async/iterator kickoff method
var localSlotDebugInfo = debugInfo.LocalSlots.NullToEmpty();
GetStateMachineFieldMapFromMetadata(stateMachineType, localSlotDebugInfo, out hoistedLocalMap, out awaiterMap, out awaiterSlotCount);
hoistedLocalSlotCount = localSlotDebugInfo.Length;
// Kickoff method has no interesting locals on its own.
// We use the EnC method debug information for hoisted locals.
previousLocals = ImmutableArray <EncLocalInfo> .Empty;
stateMachineTypeName = stateMachineType.Name;
}
else
{
// If the current method is async/iterator then either the previous method wasn't declared as async/iterator and it's updated to be one,
// or it was but is not marked by the corresponding state machine attribute because it was missing in the compilation.
// In the later case we need to report an error since we don't known how to map to the previous state machine.
// The IDE already checked that the attribute type is present in the base compilation, but didn't validate that it is well-formed.
// We don't have the base compilation to directly query for the attribute, only the source compilation.
// But since constructor signatures can't be updated during EnC we can just check the current compilation.
if (method.IsAsync)
{
if (compilation.CommonGetWellKnownTypeMember(WellKnownMember.System_Runtime_CompilerServices_AsyncStateMachineAttribute__ctor) == null)
{
ReportMissingStateMachineAttribute(diagnostics, method, AttributeDescription.AsyncStateMachineAttribute.FullName);
return(null);
}
}
else if (method.IsIterator)
{
if (compilation.CommonGetWellKnownTypeMember(WellKnownMember.System_Runtime_CompilerServices_IteratorStateMachineAttribute__ctor) == null)
{
ReportMissingStateMachineAttribute(diagnostics, method, AttributeDescription.IteratorStateMachineAttribute.FullName);
return(null);
}
}
try
{
previousLocals = localSignature.IsNil ? ImmutableArray <EncLocalInfo> .Empty :
GetLocalSlotMapFromMetadata(localSignature, debugInfo);
}
catch (Exception e) when(e is UnsupportedSignatureContent || e is BadImageFormatException || e is IOException)
{
diagnostics.Add(MessageProvider.CreateDiagnostic(
MessageProvider.ERR_InvalidDebugInfo,
method.Locations.First(),
method,
MetadataTokens.GetToken(localSignature),
method.ContainingAssembly
));
return(null);
}
}
symbolMap = MapToMetadataSymbolMatcher;
}
return(new EncVariableSlotAllocator(
symbolMap,
mappedMethod.SyntaxMap,
mappedMethod.PreviousMethod,
methodId,
previousLocals,
lambdaMap,
closureMap,
stateMachineTypeName,
hoistedLocalSlotCount,
hoistedLocalMap,
awaiterSlotCount,
awaiterMap,
stateMachineStateMap,
firstUnusedIncreasingStateMachineState,
firstUnusedDecreasingStateMachineState,
GetLambdaSyntaxFacts()));
}