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Improved CdStream fix by using condition variable (without modloader for now only)

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Silent 2017-09-20 14:58:55 +02:00
parent 3df6ae1854
commit 21d0c51519
1 changed files with 130 additions and 58 deletions
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140
SilentPatchSA/SilentPatchSA.cpp
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@ -1214,71 +1214,132 @@ struct CdStream
BYTE bInUse;
BYTE field_F;
DWORD status;
union Sync {
HANDLE semaphore;
CONDITION_VARIABLE cv;
} sync;
HANDLE hFile;
OVERLAPPED overlapped;
};
static_assert(sizeof(CdStream) == 0x30, "Incorrect struct size: CdStream");
namespace CdStreamSync {
static CRITICAL_SECTION CdStreamCritSec;
static void (*orgCdStreamInitThread)();
static void CdStreamInitThread_SilentPatch()
// Function pointers for game to use
static CdStream::Sync (__stdcall *CdStreamInitializeSyncObject)();
static DWORD (__stdcall *CdStreamSyncOnObject)( CdStream* stream );
static void (__stdcall *CdStreamThreadOnObject)( CdStream* stream );
static void (__stdcall *CdStreamCloseObject)( CdStream::Sync* sync );
static void (__stdcall *CdStreamShutdownSyncObject)( CdStream* stream );
static void __stdcall CdStreamShutdownSyncObject_Stub( CdStream* stream, size_t idx )
{
orgCdStreamInitThread();
InitializeCriticalSectionAndSpinCount( &CdStreamCritSec, 10 );
CdStreamShutdownSyncObject( &stream[idx] );
}
DWORD CdStreamSync_SilentPatch( CdStream* stream )
namespace Sema
{
CdStream::Sync __stdcall InitializeSyncObject()
{
CdStream::Sync object;
object.semaphore = CreateSemaphore( nullptr, 0, 2, nullptr );
return object;
}
void __stdcall ShutdownSyncObject( CdStream* stream )
{
CloseHandle( stream->sync.semaphore );
}
DWORD __stdcall CdStreamSync( CdStream* stream )
{
EnterCriticalSection( &CdStreamCritSec );
if ( stream->nSectorsToRead != 0 )
{
stream->bLocked = 1;
LeaveCriticalSection( &CdStreamCritSec );
WaitForSingleObject( stream->semaphore, INFINITE );
WaitForSingleObject( stream->sync.semaphore, INFINITE );
EnterCriticalSection( &CdStreamCritSec );
}
stream->bInUse = 0;
LeaveCriticalSection( &CdStreamCritSec );
return stream->status;
}
}
void CdStreamThread_SilentPatch( CdStream* stream )
{
void __stdcall CdStreamThread( CdStream* stream )
{
EnterCriticalSection( &CdStreamCritSec );
stream->nSectorsToRead = 0;
if ( stream->bLocked != 0 )
{
ReleaseSemaphore( stream->semaphore, 1, nullptr );
ReleaseSemaphore( stream->sync.semaphore, 1, nullptr );
}
stream->bInUse = 0;
LeaveCriticalSection( &CdStreamCritSec );
}
void __declspec(naked) asmCdStreamSync_SilentPatch()
{
_asm
{
push esi
call CdStreamSync_SilentPatch
add esp, 4
pop esi
retn
}
}
static void* asmCdStreamThread_JumpBack;
void __declspec(naked) asmCdStreamThread_SilentPatch()
namespace CV
{
_asm
CdStream::Sync __stdcall InitializeSyncObject()
{
push esi
call CdStreamThread_SilentPatch
add esp, 4
jmp asmCdStreamThread_JumpBack
CdStream::Sync object;
InitializeConditionVariable( &object.cv );
return object;
}
void __stdcall ShutdownSyncObject( CdStream* stream )
{
}
DWORD __stdcall CdStreamSync( CdStream* stream )
{
EnterCriticalSection( &CdStreamCritSec );
while ( stream->nSectorsToRead != 0 )
{
SleepConditionVariableCS( &stream->sync.cv, &CdStreamCritSec, INFINITE );
}
stream->bInUse = 0;
LeaveCriticalSection( &CdStreamCritSec );
return stream->status;
}
void __stdcall CdStreamThread( CdStream* stream )
{
EnterCriticalSection( &CdStreamCritSec );
stream->nSectorsToRead = 0;
WakeConditionVariable( &stream->sync.cv );
stream->bInUse = 0;
LeaveCriticalSection( &CdStreamCritSec );
}
}
static void (*orgCdStreamInitThread)();
static void CdStreamInitThread()
{
// TODO: Branch for XP
if ( GetASIModuleHandle( L"modloader" ) != nullptr )
{
CdStreamInitializeSyncObject = Sema::InitializeSyncObject;
CdStreamShutdownSyncObject = Sema::ShutdownSyncObject;
CdStreamSyncOnObject = Sema::CdStreamSync;
CdStreamThreadOnObject = Sema::CdStreamThread;
}
else
{
CdStreamInitializeSyncObject = CV::InitializeSyncObject;
CdStreamShutdownSyncObject = CV::ShutdownSyncObject;
CdStreamSyncOnObject = CV::CdStreamSync;
CdStreamThreadOnObject = CV::CdStreamThread;
}
orgCdStreamInitThread();
InitializeCriticalSectionAndSpinCount( &CdStreamCritSec, 10 );
}
}
#if MEM_VALIDATORS
@ -3706,14 +3767,25 @@ void Patch_SA_10()
Patch<float>(0x5D8903 + 6, 0);
Patch<float>(0x5D890D + 6, 0);
// Race condition in CdStream fixed
ReadCall( 0x406C78, orgCdStreamInitThread );
InjectHook( 0x406C78, CdStreamInitThread_SilentPatch );
InjectHook( 0x40647D, asmCdStreamSync_SilentPatch, PATCH_JUMP );
ReadCall( 0x406C78, CdStreamSync::orgCdStreamInitThread );
InjectHook( 0x406C78, CdStreamSync::CdStreamInitThread );
asmCdStreamThread_JumpBack = (void*)0x406681;
InjectHook( 0x406669, asmCdStreamThread_SilentPatch, PATCH_JUMP );
Patch( 0x40647D, { 0x56, 0xFF, 0x15 } );
Patch( 0x40647D + 3, &CdStreamSync::CdStreamSyncOnObject );
Patch( 0x406669, { 0x56, 0xFF, 0x15 } );
Patch( 0x406669 + 3, &CdStreamSync::CdStreamThreadOnObject );
Patch( 0x406669 + 3 + 4, { 0xEB, 0x0F } );
Patch( 0x406910, { 0xFF, 0x15 } );
Patch( 0x406910 + 2, &CdStreamSync::CdStreamInitializeSyncObject );
Nop( 0x406910 + 6, 4 );
Nop( 0x406926, 2 );
Patch( 0x4063B5, { 0x56, 0x50 } );
InjectHook( 0x4063B5 + 2, CdStreamSync::CdStreamShutdownSyncObject_Stub, PATCH_CALL );
}
void Patch_SA_11()