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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
using System;
using System.Collections.Generic;
using System.Collections.Immutable;
using System.Composition;
using System.IO;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.CodeAnalysis.Contracts.EditAndContinue;
using Microsoft.CodeAnalysis.Diagnostics;
using Microsoft.CodeAnalysis.Emit;
using Microsoft.CodeAnalysis.ErrorReporting;
using Microsoft.CodeAnalysis.Host.Mef;
using Microsoft.CodeAnalysis.Shared.Extensions;
using Roslyn.Utilities;
namespace Microsoft.CodeAnalysis.EditAndContinue;
/// <summary>
/// Implements core of Edit and Continue orchestration: management of edit sessions and connecting EnC related services.
/// </summary>
[Export(typeof(IEditAndContinueService)), Shared]
internal sealed class EditAndContinueService : IEditAndContinueService
{
[ExportWorkspaceService(typeof(IEditAndContinueWorkspaceService)), Shared]
[method: ImportingConstructor]
[method: Obsolete(MefConstruction.ImportingConstructorMessage, error: true)]
internal sealed class WorkspaceService(
IEditAndContinueService service,
[Import(AllowDefault = true)] IEditAndContinueSessionTracker? sessionTracker = null) : IEditAndContinueWorkspaceService
{
public IEditAndContinueService Service { get; } = service;
public IEditAndContinueSessionTracker SessionTracker { get; } = sessionTracker ?? VoidSessionTracker.Instance;
}
private sealed class VoidSessionTracker : IEditAndContinueSessionTracker
{
public static readonly VoidSessionTracker Instance = new();
public bool IsSessionActive => false;
public ImmutableArray<DiagnosticData> ApplyChangesDiagnostics => [];
}
internal static readonly TraceLog Log;
internal static readonly TraceLog AnalysisLog;
private Func<Project, CompilationOutputs> _compilationOutputsProvider;
/// <summary>
/// List of active debugging sessions (small number of simoultaneously active sessions is expected).
/// </summary>
private readonly List<DebuggingSession> _debuggingSessions = [];
private static int s_debuggingSessionId;
[ImportingConstructor]
[Obsolete(MefConstruction.ImportingConstructorMessage, error: true)]
public EditAndContinueService()
{
_compilationOutputsProvider = GetCompilationOutputs;
}
static EditAndContinueService()
{
Log = new(2048, "EnC", "Trace.log");
AnalysisLog = new(1024, "EnC", "Analysis.log");
var logDir = GetLogDirectory();
if (logDir != null)
{
Log.SetLogDirectory(logDir);
AnalysisLog.SetLogDirectory(logDir);
}
}
private static string? GetLogDirectory()
{
try
{
var path = Environment.GetEnvironmentVariable("Microsoft_CodeAnalysis_EditAndContinue_LogDir");
if (string.IsNullOrWhiteSpace(path))
{
return null;
}
Directory.CreateDirectory(path);
return path;
}
catch
{
return null;
}
}
public void SetFileLoggingDirectory(string? logDirectory)
{
Log.SetLogDirectory(logDirectory ?? GetLogDirectory());
}
private static CompilationOutputs GetCompilationOutputs(Project project)
{
// The Project System doesn't always indicate whether we emit PDB, what kind of PDB we emit nor the path of the PDB.
// To work around we look for the PDB on the path specified in the PDB debug directory.
// https://github.com/dotnet/roslyn/issues/35065
return new CompilationOutputFilesWithImplicitPdbPath(project.CompilationOutputInfo.AssemblyPath);
}
private DebuggingSession? TryGetDebuggingSession(DebuggingSessionId sessionId)
{
lock (_debuggingSessions)
{
return _debuggingSessions.SingleOrDefault(s => s.Id == sessionId);
}
}
private ImmutableArray<DebuggingSession> GetActiveDebuggingSessions()
{
lock (_debuggingSessions)
{
return [.. _debuggingSessions];
}
}
private ImmutableArray<DebuggingSession> GetDiagnosticReportingDebuggingSessions()
{
lock (_debuggingSessions)
{
return _debuggingSessions.Where(s => s.ReportDiagnostics).ToImmutableArray();
}
}
public async ValueTask<DebuggingSessionId> StartDebuggingSessionAsync(
Solution solution,
IManagedHotReloadService debuggerService,
IPdbMatchingSourceTextProvider sourceTextProvider,
ImmutableArray<DocumentId> captureMatchingDocuments,
bool captureAllMatchingDocuments,
bool reportDiagnostics,
CancellationToken cancellationToken)
{
try
{
Contract.ThrowIfTrue(captureAllMatchingDocuments && !captureMatchingDocuments.IsEmpty);
IEnumerable<KeyValuePair<DocumentId, CommittedSolution.DocumentState>> initialDocumentStates;
if (captureAllMatchingDocuments || !captureMatchingDocuments.IsEmpty)
{
var documentsByProject = captureAllMatchingDocuments
? solution.Projects.Select(project => (project, project.State.DocumentStates.States.Values))
: GetDocumentStatesGroupedByProject(solution, captureMatchingDocuments);
initialDocumentStates = await CommittedSolution.GetMatchingDocumentsAsync(documentsByProject, _compilationOutputsProvider, sourceTextProvider, cancellationToken).ConfigureAwait(false);
}
else
{
initialDocumentStates = [];
}
// Make sure the solution snapshot has all source-generated documents up-to-date:
solution = solution.WithUpToDateSourceGeneratorDocuments(solution.ProjectIds);
var sessionId = new DebuggingSessionId(Interlocked.Increment(ref s_debuggingSessionId));
var session = new DebuggingSession(sessionId, solution, debuggerService, _compilationOutputsProvider, sourceTextProvider, initialDocumentStates, reportDiagnostics);
lock (_debuggingSessions)
{
_debuggingSessions.Add(session);
}
Log.Write("Session #{0} started.", sessionId.Ordinal);
return sessionId;
}
catch (Exception ex) when (FatalError.ReportAndPropagateUnlessCanceled(ex, cancellationToken))
{
throw ExceptionUtilities.Unreachable();
}
}
private static IEnumerable<(Project, IEnumerable<DocumentState>)> GetDocumentStatesGroupedByProject(Solution solution, ImmutableArray<DocumentId> documentIds)
=> from documentId in documentIds
where solution.ContainsDocument(documentId)
group documentId by documentId.ProjectId into projectDocumentIds
let project = solution.GetRequiredProject(projectDocumentIds.Key)
select (project, from documentId in projectDocumentIds select project.State.DocumentStates.GetState(documentId));
public void EndDebuggingSession(DebuggingSessionId sessionId)
{
DebuggingSession? debuggingSession;
lock (_debuggingSessions)
{
_debuggingSessions.TryRemoveFirst((s, sessionId) => s.Id == sessionId, sessionId, out debuggingSession);
}
Contract.ThrowIfNull(debuggingSession, "Debugging session has not started.");
debuggingSession.EndSession(out var telemetryData);
Log.Write("Session #{0} ended.", debuggingSession.Id.Ordinal);
}
public void BreakStateOrCapabilitiesChanged(DebuggingSessionId sessionId, bool? inBreakState)
{
var debuggingSession = TryGetDebuggingSession(sessionId);
Contract.ThrowIfNull(debuggingSession);
debuggingSession.BreakStateOrCapabilitiesChanged(inBreakState);
}
public ValueTask<ImmutableArray<Diagnostic>> GetDocumentDiagnosticsAsync(Document document, ActiveStatementSpanProvider activeStatementSpanProvider, CancellationToken cancellationToken)
{
return GetDiagnosticReportingDebuggingSessions().SelectManyAsArrayAsync(
(s, arg, cancellationToken) => s.GetDocumentDiagnosticsAsync(arg.document, arg.activeStatementSpanProvider, cancellationToken),
(document, activeStatementSpanProvider),
cancellationToken);
}
public ValueTask<EmitSolutionUpdateResults> EmitSolutionUpdateAsync(
DebuggingSessionId sessionId,
Solution solution,
ActiveStatementSpanProvider activeStatementSpanProvider,
CancellationToken cancellationToken)
{
var debuggingSession = TryGetDebuggingSession(sessionId);
if (debuggingSession == null)
{
return ValueTaskFactory.FromResult(EmitSolutionUpdateResults.Empty);
}
return debuggingSession.EmitSolutionUpdateAsync(solution, activeStatementSpanProvider, cancellationToken);
}
public void CommitSolutionUpdate(DebuggingSessionId sessionId)
{
var debuggingSession = TryGetDebuggingSession(sessionId);
Contract.ThrowIfNull(debuggingSession);
debuggingSession.CommitSolutionUpdate();
}
public void DiscardSolutionUpdate(DebuggingSessionId sessionId)
{
var debuggingSession = TryGetDebuggingSession(sessionId);
Contract.ThrowIfNull(debuggingSession);
debuggingSession.DiscardSolutionUpdate();
}
public ValueTask<ImmutableArray<ImmutableArray<ActiveStatementSpan>>> GetBaseActiveStatementSpansAsync(DebuggingSessionId sessionId, Solution solution, ImmutableArray<DocumentId> documentIds, CancellationToken cancellationToken)
{
var debuggingSession = TryGetDebuggingSession(sessionId);
if (debuggingSession == null)
{
return default;
}
return debuggingSession.GetBaseActiveStatementSpansAsync(solution, documentIds, cancellationToken);
}
public ValueTask<ImmutableArray<ActiveStatementSpan>> GetAdjustedActiveStatementSpansAsync(DebuggingSessionId sessionId, TextDocument mappedDocument, ActiveStatementSpanProvider activeStatementSpanProvider, CancellationToken cancellationToken)
{
var debuggingSession = TryGetDebuggingSession(sessionId);
if (debuggingSession == null)
{
return ValueTaskFactory.FromResult(ImmutableArray<ActiveStatementSpan>.Empty);
}
return debuggingSession.GetAdjustedActiveStatementSpansAsync(mappedDocument, activeStatementSpanProvider, cancellationToken);
}
internal TestAccessor GetTestAccessor()
=> new(this);
internal readonly struct TestAccessor(EditAndContinueService service)
{
private readonly EditAndContinueService _service = service;
public void SetOutputProvider(Func<Project, CompilationOutputs> value)
=> _service._compilationOutputsProvider = value;
public DebuggingSession GetDebuggingSession(DebuggingSessionId id)
=> _service.TryGetDebuggingSession(id) ?? throw ExceptionUtilities.UnexpectedValue(id);
public ImmutableArray<DebuggingSession> GetActiveDebuggingSessions()
=> _service.GetActiveDebuggingSessions();
}
}
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