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Add live debugger frontend and mutex stall recovery (#383)

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This commit is contained in:
Spooks
2026-07-17 22:41:07 -06:00
committed by GitHub
parent 1c8cdd6537
commit 13269797bf
57 changed files with 6534 additions and 22 deletions
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src/SharpEmu.Core/Cpu/Native/DirectExecutionBackend.cs
+50
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@@ -9,6 +9,7 @@ using System.Linq;
using System.Runtime.InteropServices;
using System.Threading;
using SharpEmu.Core.Cpu;
using SharpEmu.Core.Cpu.Debugging;
using SharpEmu.Core.Loader;
using SharpEmu.Core.Memory;
using SharpEmu.HLE;
@@ -235,6 +236,11 @@ public sealed unsafe partial class DirectExecutionBackend : INativeCpuBackend, I
private CpuContext? _cpuContext;
// Debugger seam; both null when no debugger is attached.
private ICpuDebugHook? _debugHook;
private ICpuDebugFrame? _activeDebugFrame;
[ThreadStatic]
private static DirectExecutionBackend? _activeExecutionBackend;
@@ -890,6 +896,49 @@ public sealed unsafe partial class DirectExecutionBackend : INativeCpuBackend, I
private bool HasActiveExecutionThread => ReferenceEquals(_activeExecutionBackend, this);
/// <summary>
/// Binds the debug frame view the dispatcher created for the frame about to
/// run, so stall notifications reference the same frame the debugger saw at
/// entry. Set to null when no debugger is attached.
/// </summary>
internal void SetActiveDebugFrame(ICpuDebugFrame? frame) => _activeDebugFrame = frame;
/// <summary>
/// Notifies an attached debugger of a detected execution stall. No-op when no
/// debugger is attached or no frame is bound. The debugger may block here to
/// present a break before the backend forces the guest out of the loop.
/// </summary>
private void NotifyDebuggerStall(
CpuStallKind kind,
in ImportStubEntry import,
ulong instructionPointer,
long dispatchIndex,
ulong argument0,
ulong argument1)
{
var hook = _debugHook;
var frame = _activeDebugFrame;
if (hook is null || frame is null)
{
return;
}
var export = import.Export;
var exportDescription = export is null ? "unresolved" : $"{export.LibraryName}:{export.Name}";
var detail = $"kind={kind}, nid={import.Nid}, export={exportDescription}, dispatch#{dispatchIndex}, " +
$"rip=0x{instructionPointer:X16}, arg0=0x{argument0:X16}, arg1=0x{argument1:X16}";
hook.OnStall(frame, new CpuStallInfo(
kind,
import.Nid,
instructionPointer,
dispatchIndex,
argument0,
argument1,
detail,
export?.LibraryName,
export?.Name));
}
private CpuContext? ActiveCpuContext => HasActiveExecutionThread ? _activeCpuContext : _cpuContext;
private ulong ActiveEntryReturnSentinelRip
@@ -1051,6 +1100,7 @@ public sealed unsafe partial class DirectExecutionBackend : INativeCpuBackend, I
Console.Error.WriteLine(_moduleManager.TryGetExport("L-Q3LEjIbgA", out ExportedFunction export2) ? ("[LOADER][INFO] ExportCheck map_direct: " + export2.LibraryName + ":" + export2.Name) : "[LOADER][INFO] ExportCheck map_direct: MISSING");
_entryPoint = entryPoint;
_cpuContext = context;
_debugHook = executionOptions.DebugHook;
_returnFallbackTarget = context[CpuRegister.Rsi];
Volatile.Write(ref _globalFallbackTarget, _returnFallbackTarget);
Volatile.Write(ref _globalUnresolvedReturnStub, (ulong)_unresolvedReturnStub);