You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
146 lines
3.6 KiB
146 lines
3.6 KiB
/*
|
|
|
|
Copyright (c) 2001 Microsoft Corporation
|
|
|
|
Module Name:
|
|
|
|
DisableBoostThread.cpp
|
|
|
|
Abstract:
|
|
|
|
DisableBoostThread disables the autoboost that threads get when they
|
|
unblocked. The NT scheduler will normally temporarily boost a thread
|
|
when the synchronization object gets release. 9X does not: it only check
|
|
if there is a higher priority thread.
|
|
|
|
This was first written for Hijaak: besied its many memory bugs, as a race
|
|
condition between its worker thread and its main thread. See b#379504 for details.
|
|
|
|
History:
|
|
|
|
06/28/2001 pierreys Created
|
|
*/
|
|
|
|
#include "precomp.h"
|
|
|
|
IMPLEMENT_SHIM_BEGIN(DisableBoostThread)
|
|
|
|
#include "ShimHookMacro.h"
|
|
|
|
APIHOOK_ENUM_BEGIN
|
|
APIHOOK_ENUM_ENTRY(CreateThread)
|
|
APIHOOK_ENUM_END
|
|
|
|
HANDLE
|
|
APIHOOK(CreateThread)(
|
|
LPSECURITY_ATTRIBUTES lpsa,
|
|
DWORD cbStack,
|
|
LPTHREAD_START_ROUTINE lpStartAddress,
|
|
LPVOID lpvThreadParm,
|
|
DWORD fdwCreate,
|
|
LPDWORD lpIDThread
|
|
)
|
|
{
|
|
HANDLE hThread;
|
|
|
|
//
|
|
// Call the original API
|
|
//
|
|
hThread=ORIGINAL_API(CreateThread)(
|
|
lpsa,
|
|
cbStack,
|
|
lpStartAddress,
|
|
lpvThreadParm,
|
|
fdwCreate,
|
|
lpIDThread
|
|
);
|
|
|
|
if (hThread!=NULL)
|
|
{
|
|
//
|
|
// We are disabling (rather weird, but TRUE means disabling)
|
|
// the autoboost a thread gets for unblocking.
|
|
//
|
|
SetThreadPriorityBoost(hThread, TRUE);
|
|
}
|
|
|
|
return(hThread);
|
|
}
|
|
|
|
BOOL
|
|
NOTIFY_FUNCTION(
|
|
DWORD fdwReason
|
|
)
|
|
{
|
|
if (fdwReason==DLL_PROCESS_ATTACH)
|
|
{
|
|
CSTRING_TRY
|
|
{
|
|
BOOL fBoostMainThread=FALSE;
|
|
|
|
CString csCl(COMMAND_LINE);
|
|
CStringParser csParser(csCl, L" ");
|
|
|
|
int argc = csParser.GetCount();
|
|
|
|
for (int i = 0; i < argc; ++i)
|
|
{
|
|
if (csParser[i] == L"+LowerMainThread")
|
|
{
|
|
DPFN( eDbgLevelSpew, "LowerMainThread Selected");
|
|
|
|
//
|
|
// Unboost the main thread to make sure it runs first.
|
|
//
|
|
SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_LOWEST);
|
|
}
|
|
else if (csParser[i] == L"+HigherMainThread")
|
|
{
|
|
DPFN( eDbgLevelSpew, "HigherMainThread Selected");
|
|
|
|
//
|
|
// Boost the main thread to make sure it runs first.
|
|
//
|
|
SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_HIGHEST);
|
|
}
|
|
else if (csParser[i] == L"+BoostMainThread")
|
|
{
|
|
DPFN( eDbgLevelSpew, "HigherMainThread Selected");
|
|
|
|
fBoostMainThread = TRUE;
|
|
}
|
|
else
|
|
{
|
|
DPFN( eDbgLevelError, "Ignoring unknown command:%S", csParser[i].Get());
|
|
}
|
|
|
|
}
|
|
|
|
if (!fBoostMainThread)
|
|
{
|
|
//
|
|
// We are disabling (rather weird, but TRUE means disabling)
|
|
// the autoboost a thread gets for unblocking.
|
|
//
|
|
SetThreadPriorityBoost(GetCurrentThread(), TRUE);
|
|
}
|
|
}
|
|
CSTRING_CATCH
|
|
{
|
|
DPFN( eDbgLevelError, "String error, ignoring command line");
|
|
}
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
HOOK_BEGIN
|
|
|
|
CALL_NOTIFY_FUNCTION
|
|
|
|
APIHOOK_ENTRY(KERNEL32.DLL, CreateThread)
|
|
|
|
HOOK_END
|
|
|
|
|
|
IMPLEMENT_SHIM_END
|