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bump version to 1.0.2.0, add, fixed interception of excepcons (now propagate with DBG_EXCEPTION_NOT_HANDLED), fixed a performance issue when a process with an applied patch was being scanned again

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This commit is contained in:
kitbyte
2025-04-09 14:59:05 +02:00
parent 9ed3d270e3
commit b283c63fd7
3 changed files with 20 additions and 10 deletions
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WeModPatcher/Core/RuntimePatcher.cs
+17 -8
View File
@@ -43,13 +43,16 @@ namespace WeModPatcher.Core
}
var debugEvent = new Imports.DEBUG_EVENT();
var processIds = new List<uint>();
var processIds = new Dictionary<uint, bool>();
while (Imports.WaitForDebugEvent(ref debugEvent, uint.MaxValue))
{
uint continueStatus = Imports.DBG_CONTINUE;
var code = debugEvent.dwDebugEventCode;
// Console.WriteLine("Debug event code: " + code);
if (code == Imports.CREATE_PROCESS_DEBUG_EVENT)
{
processIds.Add(debugEvent.dwProcessId);
// Console.WriteLine("Spawning process: " + debugEvent.dwProcessId);
processIds.Add(debugEvent.dwProcessId, false);
}
else if (code == Imports.EXIT_PROCESS_DEBUG_EVENT)
{
@@ -62,11 +65,17 @@ namespace WeModPatcher.Core
}
else if (code == Imports.EXCEPTION_DEBUG_EVENT)
{
var exceptionInfo = Imports.MapUnmanagedStructure<Imports.EXCEPTION_DEBUG_INFO>(debugEvent.Union);
// pass the exception to the process
continueStatus = Imports.DBG_EXCEPTION_NOT_HANDLED;
if (exceptionInfo.ExceptionRecord.ExceptionCode == Imports.EXCEPTION_BREAKPOINT)
var exceptionInfo = Imports.MapUnmanagedStructure<Imports.EXCEPTION_DEBUG_INFO>(debugEvent.Union);
// Console.WriteLine("Exception code: " + exceptionInfo.ExceptionRecord.ExceptionCode);
if (exceptionInfo.ExceptionRecord.ExceptionCode == Imports.EXCEPTION_BREAKPOINT &&
processIds.TryGetValue(debugEvent.dwProcessId, out var wasPatched) && !wasPatched)
{
var process = Process.GetProcessById((int)debugEvent.dwProcessId);
// Console.WriteLine("Scanning process: " + process.ProcessName + " " + process.Id);
var address = MemoryUtils.ScanVirtualMemory(
process.Handle,
process.Modules[0].BaseAddress,
@@ -76,7 +85,7 @@ namespace WeModPatcher.Core
if (address != IntPtr.Zero)
{
MemoryUtils.SafeWriteVirtualMemory(
processIds[debugEvent.dwProcessId] = MemoryUtils.SafeWriteVirtualMemory(
process.Handle,
address + Constants.ExePatchSignature.Offset,
Constants.ExePatchSignature.PatchBytes
@@ -96,12 +105,12 @@ namespace WeModPatcher.Core
}
}
Imports.ContinueDebugEvent(debugEvent.dwProcessId, debugEvent.dwThreadId, Imports.DBG_CONTINUE);
Imports.ContinueDebugEvent(debugEvent.dwProcessId, debugEvent.dwThreadId, continueStatus);
}
foreach (var processId in processIds)
foreach (var entry in processIds)
{
Imports.DebugActiveProcessStop(processId);
Imports.DebugActiveProcessStop(entry.Key);
}
Imports.CloseHandle(processInfo.hProcess);
WeModPatcher/Properties/AssemblyInfo.cs
+2 -2
View File
@@ -51,5 +51,5 @@ using System.Windows;
// You can specify all the values or you can default the Build and Revision Numbers
// by using the '*' as shown below:
// [assembly: AssemblyVersion("1.0.*")]
[assembly: AssemblyVersion("1.0.1.0")]
[assembly: AssemblyFileVersion("1.0.0.0")]
[assembly: AssemblyVersion("1.0.2.0")]
[assembly: AssemblyFileVersion("1.0.2.0")]
WeModPatcher/Utils/Win32/Imports.cs
+1
View File
@@ -252,6 +252,7 @@ namespace WeModPatcher.Utils.Win32
public const uint LOAD_DLL_DEBUG_EVENT = 6;
public const uint OUTPUT_DEBUG_STRING_EVENT = 8;
public const uint EXCEPTION_BREAKPOINT = 0x80000003;
public const uint DBG_EXCEPTION_NOT_HANDLED = 0x80010001;
// Constants for VirtualProtectex
public const uint PAGE_EXECUTE_READWRITE = 0x40;