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[cpu] Add guest thread continuation

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This commit is contained in:
ParantezTech
2026-06-21 23:18:29 +03:00
parent 08b315b5fc
commit 2a52ccfe6a
6 changed files with 1458 additions and 187 deletions
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src/SharpEmu.Core/Cpu/Native/DirectExecutionBackend.Exceptions.cs
+48 -4
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@@ -7,6 +7,7 @@ using System.Collections.Generic;
using System.Globalization;
using System.Reflection;
using System.Runtime.InteropServices;
using System.Threading;
using SharpEmu.Core.Cpu.Disasm;
using SharpEmu.HLE;
@@ -61,7 +62,7 @@ public sealed partial class DirectExecutionBackend
{
if (_vectoredHandlerDepth > 0)
{
Console.Error.WriteLine("[LOADER][TRACE] Nested VEH exception; passing through.");
LogNestedVectoredException(exceptionInfo);
Console.Error.Flush();
return 0;
}
@@ -84,10 +85,18 @@ public sealed partial class DirectExecutionBackend
ulong rip = ReadCtxU64(contextRecord, 248);
ulong rsp = ReadCtxU64(contextRecord, 152);
if (exceptionCode == 3221225477u && TryHandleLazyCommittedPage(exceptionRecord))
if (exceptionCode == 3221225477u && TryHandleLazyCommittedPage(exceptionRecord, rip, rsp))
{
return -1;
}
if (IsBenignHostDebugException(exceptionCode))
{
return -1;
}
if (exceptionCode == MSVC_CPP_EXCEPTION)
{
return 0;
}
switch (exceptionCode)
{
@@ -278,6 +287,37 @@ public sealed partial class DirectExecutionBackend
}
}
private static bool IsBenignHostDebugException(uint exceptionCode)
{
return exceptionCode is DBG_PRINTEXCEPTION_C or DBG_PRINTEXCEPTION_WIDE_C or MS_VC_THREADNAME_EXCEPTION;
}
private unsafe static void LogNestedVectoredException(void* exceptionInfo)
{
int count = Interlocked.Increment(ref _nestedVehTraceCount);
if (count > 16 && count % 128 != 0)
{
return;
}
try
{
EXCEPTION_POINTERS* pointers = (EXCEPTION_POINTERS*)exceptionInfo;
EXCEPTION_RECORD* record = pointers->ExceptionRecord;
void* contextRecord = pointers->ContextRecord;
ulong rip = contextRecord != null ? ReadCtxU64(contextRecord, 248) : 0;
ulong rsp = contextRecord != null ? ReadCtxU64(contextRecord, 152) : 0;
ulong accessType = record->NumberParameters >= 1 ? *record->ExceptionInformation : 0;
ulong target = record->NumberParameters >= 2 ? record->ExceptionInformation[1] : 0;
Console.Error.WriteLine(
$"[LOADER][TRACE] Nested VEH exception#{count}: code=0x{record->ExceptionCode:X8} ex=0x{(ulong)record->ExceptionAddress:X16} rip=0x{rip:X16} rsp=0x{rsp:X16} type={accessType} target=0x{target:X16}; passing through.");
}
catch
{
Console.Error.WriteLine($"[LOADER][TRACE] Nested VEH exception#{count}; passing through.");
}
}
private unsafe void LogAccessViolationTrace(ulong exceptionAddress, EXCEPTION_RECORD* exceptionRecord)
{
ulong accessType = exceptionRecord->NumberParameters >= 1 ? (*exceptionRecord->ExceptionInformation) : 0;
@@ -828,7 +868,7 @@ public sealed partial class DirectExecutionBackend
return true;
}
private unsafe static bool TryHandleLazyCommittedPage(EXCEPTION_RECORD* exceptionRecord)
private unsafe bool TryHandleLazyCommittedPage(EXCEPTION_RECORD* exceptionRecord, ulong rip, ulong rsp)
{
if (exceptionRecord->NumberParameters < 2)
{
@@ -845,6 +885,10 @@ public sealed partial class DirectExecutionBackend
{
return false;
}
if (!IsGuestOwnedLazyCommitAddress(faultAddress, out var owner))
{
return false;
}
if (VirtualQuery((void*)faultAddress, out var mbi, (nuint)sizeof(MEMORY_BASIC_INFORMATION64)) == 0)
{
return false;
@@ -852,7 +896,7 @@ public sealed partial class DirectExecutionBackend
ulong pageBase = faultAddress & 0xFFFFFFFFFFFFF000uL;
uint commitProtect = ResolveLazyCommitProtection(accessType, mbi.AllocationProtect);
Console.Error.WriteLine($"[LOADER][TRACE] lazy-query: fault=0x{faultAddress:X16} state=0x{mbi.State:X08} base=0x{mbi.BaseAddress:X16} size=0x{mbi.RegionSize:X16} alloc=0x{mbi.AllocationProtect:X08} prot=0x{mbi.Protect:X08}");
Console.Error.WriteLine($"[LOADER][TRACE] lazy-query: fault=0x{faultAddress:X16} owner={owner} rip=0x{rip:X16} rsp=0x{rsp:X16} state=0x{mbi.State:X08} base=0x{mbi.BaseAddress:X16} size=0x{mbi.RegionSize:X16} alloc=0x{mbi.AllocationProtect:X08} prot=0x{mbi.Protect:X08}");
bool committed = false;
ulong committedBase = 0;