windows-nt/Source/XPSP1/NT/com/ole32/olethunk/olethk32/inv32.cxx

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//+---------------------------------------------------------------------------
//
// Microsoft Windows
// Copyright (C) Microsoft Corporation, 1992 - 1994.
//
// File: inv32.cxx
//
// Contents: Implementation of InvokeOn32
//
// History: 22-Feb-94 DrewB Created
//
//----------------------------------------------------------------------------
#include "headers.cxx"
#pragma hdrstop
STDAPI_(BOOL) IsValidInterface( void FAR* pv );
#include <apilist.hxx>
//+---------------------------------------------------------------------------
//
// Function: InvokeOn32, public
//
// Synopsis: Sets up the THUNKINFO and starts thunking for a 16->32 call
//
// Arguments: [dw1] - Ignored
// [dwMethod] - Method index
// [pvStack32] - 32-bit stack
//
// Returns: Appropriate status code
//
// History: 18-Dec-93 JohannP Created
// 21-Feb-94 DrewB Modified
// 09-Dec-94 JohannP added stack switching
//
// Note: On WIN95 this function get is executed on the 32 bit stack.
//
//----------------------------------------------------------------------------
#if DBG == 1
extern "C"
{
ULONG InvokeOn32_count = 0;
ULONG InvokeOn32_break = 0;
int _iInvokeOn32BreakIidx = -1;
int _iInvokeOn32BreakMethod = -1;
};
#endif
// InvokeOn32 uses a lot of local variables so allocate its locals
// rather than declaring them on the stack. This saves roughly
// 150 bytes of stack per call
struct INVOKE32RECORD
{
THOP CONST *pThop;
THOP CONST * CONST *ppThop;
UINT uiThop;
VTBLFN CONST *pvfnVtbl;
VTBLFN CONST * CONST *ppvfnThis32;
DWORD dwStack32[MAX_PARAMS];
THUNKINFO ti;
VPVOID vpvThis16;
THUNK1632OBJ UNALIGNED *pto;
IIDIDX iidx;
ThreadData *ptd;
};
STDAPI_(DWORD) SSAPI(InvokeOn32)(DWORD dw1, DWORD dwMethod, LPVOID pvStack16)
{
// NOTE: Do not declare local variables in this routine
// except for debug builds
INVOKE32RECORD *pir;
DWORD dwResult;
#if DBG == 1
ULONG ulInvokeOn32_count = ++InvokeOn32_count;
if (InvokeOn32_count == InvokeOn32_break)
{
DebugBreak();
}
thkDebugOut((DEB_ITRACE, "%sInvokeOn32(0x%08x, %p)\n",
NestingLevelString(),
dwMethod, pvStack16));
#endif // DBG
if(!TlsThkGetData())
return(CO_E_NOTINITIALIZED);
pir = (INVOKE32RECORD *)STACKALLOC32(sizeof(INVOKE32RECORD));
if (pir == NULL)
{
// This error isn't guaranteed to mean anything for
// this call. Not much else we can do, though
return (DWORD)E_OUTOFMEMORY;
}
// pvStack16 is the pointer to the first parameter of the 16-bit
// routine. The compiler will adjust it appropriately according
// to the calling convention of the routine so for PASCAL APIs
// it will be high and for CDECL methods it will be low
pir->ti.s16.pbStart = (BYTE *)pvStack16;
pir->ti.s16.pbCurrent = pir->ti.s16.pbStart;
pir->ti.s32.pbStart = (BYTE *)pir->dwStack32;
pir->ti.s32.pbCurrent = pir->ti.s32.pbStart;
pir->ti.scResult = S_OK;
pir->ti.fResultThunked = FALSE;
if (dwMethod >= THK_API_BASE)
{
dwMethod -= THK_API_BASE;
pir->iidx = IIDIDX_INVALID;
// APIs are handled as if there were a giant interface which
// contains all the APIs as methods.
pir->ppThop = apthopsApiThops;
pir->uiThop = THK_API_COUNT;
pir->pvfnVtbl = apfnApiFunctions;
// APIs are pascal so we need to move downward in memory to
// get to the next parameter
pir->ti.s16.iDir = -1;
pir->ti.dwCallerProxy = 0;
}
else
{
// For each interface there is an array of thop strings, one for
// each method. The IUnknown methods don't have thop strings so
// bias the thop string pointer to account for that
thkAssert(dwMethod >= SMI_COUNT);
// Methods are cdecl so we need to move upwards in memory to
// get to the next parameter
pir->ti.s16.iDir = 1;
// We need to look up the appropriate method pointer by
// looking in the 32-bit object's vtable
GET_STACK16(&pir->ti, pir->vpvThis16, VPVOID);
thkDebugOut((DEB_INVOKES,
"InvokeOn32: vpvThis16 = %08lX\n", pir->vpvThis16 ));
pir->pto = FIXVDMPTR(pir->vpvThis16, THUNK1632OBJ);
if (pir->pto == NULL)
{
STACKFREE32(pir, sizeof(INVOKE32RECORD));
return (DWORD)E_INVALIDARG;
}
if ((pir->pto->grfFlags & PROXYFLAG_TEMPORARY) == 0)
{
// Make sure proxy is still valid.
// After PPC/Win95 we might want to look at using
// a signiture for validating this rather than IsValidInterface
// because it will speed this code path up.
if (!IsValidInterface(pir->pto->punkThis32))
{
thkDebugOut((
DEB_ERROR, "InvokeOn32: %p: Invalid proxied object %p\n",
pir->vpvThis16, pir->pto->punkThis32));
STACKFREE32(pir, sizeof(INVOKE32RECORD));
RELVDMPTR(pir->vpvThis16);
return (DWORD)E_INVALIDARG;
}
DebugValidateProxy1632(pir->vpvThis16);
pir->ppvfnThis32 = (VTBLFN CONST * CONST*)pir->pto->punkThis32;
}
else
{
// Temporary proxies cannot be validated
// A temporary proxy's this pointer is actually a pointer
// to the real this pointer, so indirect through the this
// pointer to retrieve the real this pointer
pir->ppvfnThis32 = (VTBLFN CONST * CONST *)*(void **)pir->pto->punkThis32;
thkAssert(pir->ppvfnThis32 != NULL);
thkDebugOut((DEB_WARN, "WARNING: InvokeOn32 on temporary "
"%s proxy for %p\n", IidIdxString(pir->pto->iidx),
pir->ppvfnThis32));
}
pir->iidx = pir->pto->iidx;
RELVDMPTR(pir->vpvThis16);
if (pir->ppvfnThis32 == NULL)
{
STACKFREE32(pir, sizeof(INVOKE32RECORD));
return (DWORD)E_FAIL;
}
pir->ti.dwCallerProxy = pir->vpvThis16;
thkAssert(pir->iidx < THI_COUNT);
pir->ppThop = athopiInterfaceThopis[pir->iidx].ppThops-SMI_COUNT;
pir->uiThop = athopiInterfaceThopis[pir->iidx].uiSize;
pir->pvfnVtbl = *pir->ppvfnThis32;
// Push the 32-bit this pointer on the stack first
TO_STACK32(&pir->ti, pir->ppvfnThis32, VTBLFN CONST * CONST*);
}
thkAssert(dwMethod < pir->uiThop);
pir->pThop = pir->ppThop[dwMethod];
thkAssert(pir->pThop != NULL);
pir->ti.pThop = pir->pThop;
pir->ti.pvfn = pir->pvfnVtbl[dwMethod];
pir->ti.iidx = pir->iidx;
pir->ti.dwMethod = dwMethod;
pir->ptd = TlsThkGetData();
if (pir->ptd == NULL)
{
thkDebugOut((DEB_WARN, "WARNING: InvokeOn32: Call refused\n"));
STACKFREE32(pir, sizeof(INVOKE32RECORD));
return (DWORD)E_FAIL;
}
pir->ti.pThkMgr = pir->ptd->pCThkMgr;
thkAssert(pir->ti.pThkMgr != NULL);
#if DBG == 1
if (pir->iidx == IIDIDX_INVALID)
{
thkDebugOut((DEB_INVOKES, "%s#(%04X):InvokeOn32 on %p, %s\n",
NestingLevelString(), ulInvokeOn32_count,
pir->ti.pvfn, apszApiNames[dwMethod]));
}
else
{
thkDebugOut((DEB_INVOKES, "%s#(%04X):InvokeOn32 on %p:%p, %s::%s (0x%0x:0x%0x)\n",
NestingLevelString(), ulInvokeOn32_count,
pir->ppvfnThis32, pir->ti.pvfn,
inInterfaceNames[pir->iidx].pszInterface,
inInterfaceNames[pir->iidx].ppszMethodNames[dwMethod],
pir->iidx,
dwMethod));
}
#endif
DebugIncrementNestingLevel();
// save and set the new thunk state
pir->ti.pThkMgr->SetThkState(THKSTATE_INVOKETHKIN32);
#if DBG == 1
if ((_iInvokeOn32BreakIidx > 0 &&
_iInvokeOn32BreakIidx == (int)pir->iidx) &&
(_iInvokeOn32BreakMethod < 0 ||
_iInvokeOn32BreakMethod == (int)dwMethod))
{
DebugBreak();
}
#endif
#if DBG == 1
SStackRecord sr;
RecordStackState16(&sr);
#endif
#if DBG == 1
if (fStabilizeProxies)
#endif
{
// HACK HACK HACK
// Because of changes in the way refcounting rules work between
// 16 and 32-bits, we have to stabilize this pointers for
// 16->32 calls. To effect this, we do a purely local AddRef
//
// Temporary proxies are not valid proxies so they cannot
// be stabilized
if (pir->iidx != IIDIDX_INVALID)
{
DWORD dwFlags;
pir->pto = FIXVDMPTR(pir->vpvThis16, THUNK1632OBJ);
dwFlags = pir->pto->grfFlags;
RELVDMPTR(pir->vpvThis16);
if ((dwFlags & PROXYFLAG_TEMPORARY) == 0)
{
pir->ti.pThkMgr->AddRefProxy1632(pir->vpvThis16);
}
}
}
dwResult = EXECUTE_THOP1632(&pir->ti);
#if DBG == 1
if (fStabilizeProxies)
#endif
{
// Remove our stabilization reference
// Note that we don't really know whether the proxy is
// still valid, so we're just crossing our fingers here
// and hoping that things continue to work
if (pir->iidx != IIDIDX_INVALID)
{
DWORD dwFlags;
pir->pto = FIXVDMPTR(pir->vpvThis16, THUNK1632OBJ);
dwFlags = pir->pto->grfFlags;
RELVDMPTR(pir->vpvThis16);
if ((dwFlags & PROXYFLAG_TEMPORARY) == 0)
{
DebugValidateProxy1632(pir->vpvThis16);
pir->ti.pThkMgr->ReleaseProxy1632(pir->vpvThis16);
}
}
}
#if DBG == 1
if ( !pir->ti.fResultThunked && FAILED(dwResult) )
{
if (pir->iidx == IIDIDX_INVALID)
{
thkDebugOut((DEB_FAILURES,
"InvokeOn32 probable failure %s sc = %08lX\n",
apszApiNames[dwMethod],
dwResult));
}
else
{
thkDebugOut((DEB_FAILURES,
"InvokeOn32 probable failure %s::%s sc = %08lX\n",
inInterfaceNames[pir->iidx].pszInterface,
inInterfaceNames[pir->iidx].ppszMethodNames[dwMethod],
dwResult));
}
if(thkInfoLevel & DEB_DBGFAIL)
thkAssert(!"Wish to Debug");
}
CheckStackState16(&sr);
#endif
pir->ti.pThkMgr->SetThkState(THKSTATE_NOCALL);
DebugDecrementNestingLevel();
if ( !pir->ti.fResultThunked )
{
dwResult = TransformHRESULT_3216( dwResult );
}
#if DBG == 1
if (pir->iidx == IIDIDX_INVALID)
{
thkDebugOut((DEB_INVOKES,
"%s#(%04X):InvokeOn32 on %p, %s returns 0x%08lX\n",
NestingLevelString(), ulInvokeOn32_count, pir->ti.pvfn,
apszApiNames[dwMethod], dwResult ));
}
else
{
thkDebugOut((DEB_INVOKES,
"%s#(%04X):InvokeOn32 on %p:%p, %s::%s returns 0x%08lX\n",
NestingLevelString(), ulInvokeOn32_count,
pir->ppvfnThis32,
pir->ti.pvfn, inInterfaceNames[pir->iidx].pszInterface,
inInterfaceNames[pir->iidx].ppszMethodNames[dwMethod],
dwResult));
}
#endif
STACKFREE32(pir, sizeof(INVOKE32RECORD));
return dwResult;
}
#ifdef _CHICAGO_
//+---------------------------------------------------------------------------
//
// Function: SSCallback16
//
// Synopsis: Switches to 16 bit and calls back to 16 bit.
//
// Arguments: [vpfn16] -- function pointer
// [dwParam] -- pointer to parameter
//
// Returns:
//
// History: 12-08-94 JohannP (Johann Posch) Created
//
// Notes:
//
//----------------------------------------------------------------------------
DWORD WINAPI SSCallback16(DWORD vpfn16, DWORD dwParam)
{
DWORD dwRet;
// switch to the 16 bit stack
//
if (SSONBIGSTACK())
{
StackDebugOut((DEB_STCKSWTCH, "%sSSCallback16 32->16(%p)\n",NestingLevelString(), vpfn16));
dwRet = SSCall(8, SSF_SmallStack, WOWCallback16, vpfn16, dwParam);
StackDebugOut((DEB_STCKSWTCH, "%sSSCallback16 32<-16 done\n",NestingLevelString() ));
}
else
{
dwRet = WOWCallback16(vpfn16, dwParam);
}
return dwRet;
}
//+---------------------------------------------------------------------------
//
// Function: SSCallback16Ex
//
// Synopsis: Like SSCallback16 except can handle up 16 bytes of parametes
//
// Arguments: [vpfn16] -- see Callback16Ex
// [dwFlags] --
// [cbArgs] --
// [pArgs] --
// [pdwRetCode] --
//
// Returns:
//
// History: 12-08-94 JohannP (Johann Posch) Created
//
// Notes:
//
//----------------------------------------------------------------------------
BOOL WINAPI SSCallback16Ex(DWORD vpfn16, DWORD dwFlags,
DWORD cbArgs, PVOID pArgs, PDWORD pdwRetCode)
{
DWORD dwRet;
// switch to the 16 bit stack
//
if (SSONBIGSTACK())
{
StackDebugOut((DEB_STCKSWTCH, "%sSSCallback16Ex 32->16 (%p)\n",NestingLevelString(), vpfn16));
dwRet = SSCall(20, SSF_SmallStack, WOWCallback16Ex,vpfn16, dwFlags, cbArgs, pArgs, pdwRetCode);
StackDebugOut((DEB_STCKSWTCH, "%sSSCallback16Ex 32<-16 done\n",NestingLevelString() ));
}
else
{
dwRet = WOWCallback16Ex(vpfn16, dwFlags, cbArgs, pArgs, pdwRetCode);
}
return dwRet;
}
//+---------------------------------------------------------------------------
//
// Function: InvokeOn32
//
// Synopsis: Switches to the 32 bit stack and calls SSAPI(InvokeOn32)
//
// Arguments: [dw1] -- See SSAPI(InvokeOn32)
// [dwMethod] --
// [pvStack16] --
//
// Returns:
//
// History: 12-08-94 JohannP (Johann Posch) Created
//
// Notes: Only executed under WIN95
//
//----------------------------------------------------------------------------
STDAPI_(DWORD) InvokeOn32 (DWORD dw1, DWORD dwMethod, LPVOID pvStack16)
{
DWORD dwRes;
if (SSONSMALLSTACK())
{
StackDebugOut((DEB_STCKSWTCH, "%sSSInvokeOn32 16->32 (0x%08x, %p)\n",
NestingLevelString(), dwMethod, pvStack16));
dwRes = SSCall(12 ,SSF_BigStack, SSInvokeOn32, dw1, dwMethod, pvStack16);
StackDebugOut((DEB_STCKSWTCH, "%sSSInvokeOn32 16<-32 done(0x%08x, %p)\n",
NestingLevelString(), dwMethod, pvStack16));
}
else
dwRes = SSInvokeOn32(dw1, dwMethod, pvStack16);
return dwRes;
}
#endif // _CHICAGO_