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21 
22 
23 
24 // MARKER(update_precomp.py): autogen include statement, do not remove
25 #include "precompiled_bridges.hxx"
26 
27 #include <sal/alloca.h>
28 #include <rtl/alloc.h>
29 
30 #include <uno/data.h>
31 #include <bridges/cpp_uno/bridge.hxx>
32 #include <bridges/cpp_uno/type_misc.hxx>
33 
34 #include "share.hxx"
35 
36 
37 using namespace ::rtl;
38 using namespace ::com::sun::star::uno;
39 
40 namespace CPPU_CURRENT_NAMESPACE
41 {
42 
43 void dummy_can_throw_anything( char const * );
44 
45 //==================================================================================================
46 // The call instruction within the asm section of callVirtualMethod may throw
47 // exceptions.  So that the compiler handles this correctly, it is important
48 // that (a) callVirtualMethod might call dummy_can_throw_anything (although this
49 // never happens at runtime), which in turn can throw exceptions, and (b)
50 // callVirtualMethod is not inlined at its call site (so that any exceptions are
51 // caught which are thrown from the instruction calling callVirtualMethod):
52 void callVirtualMethod(
53     void * pThis,
54     sal_Int32 nVtableIndex,
55     void * pRegisterReturn,
56     typelib_TypeClass eReturnType,
57     sal_Int32 * pStackLongs,
58     sal_Int32 nStackLongs ) __attribute__((noinline));
59 
callVirtualMethod(void * pThis,sal_Int32 nVtableIndex,void * pRegisterReturn,typelib_TypeClass eReturnType,sal_Int32 * pStackLongs,sal_Int32 nStackLongs)60 void callVirtualMethod(
61     void * pThis,
62     sal_Int32 nVtableIndex,
63     void * pRegisterReturn,
64     typelib_TypeClass eReturnType,
65     sal_Int32 * pStackLongs,
66     sal_Int32 nStackLongs )
67 {
68 	// parameter list is mixed list of * and values
69 	// reference parameters are pointers
70 
71 	OSL_ENSURE( pStackLongs && pThis, "### null ptr!" );
72 	OSL_ENSURE( (sizeof(void *) == 4) && (sizeof(sal_Int32) == 4), "### unexpected size of int!" );
73 	OSL_ENSURE( nStackLongs && pStackLongs, "### no stack in callVirtualMethod !" );
74 
75     // never called
76     if (! pThis) dummy_can_throw_anything("xxx"); // address something
77 
78 	volatile long edx = 0, eax = 0; // for register returns
79     void * stackptr;
80 	asm volatile (
81         "mov   %%esp, %6\n\t"
82 		// copy values
83 		"mov   %0, %%eax\n\t"
84 		"mov   %%eax, %%edx\n\t"
85 		"dec   %%edx\n\t"
86 		"shl   $2, %%edx\n\t"
87 		"add   %1, %%edx\n"
88 		"Lcopy:\n\t"
89 		"pushl 0(%%edx)\n\t"
90 		"sub   $4, %%edx\n\t"
91 		"dec   %%eax\n\t"
92 		"jne   Lcopy\n\t"
93 		// do the actual call
94 		"mov   %2, %%edx\n\t"
95 		"mov   0(%%edx), %%edx\n\t"
96 		"mov   %3, %%eax\n\t"
97 		"shl   $2, %%eax\n\t"
98 		"add   %%eax, %%edx\n\t"
99 		"mov   0(%%edx), %%edx\n\t"
100 		"call  *%%edx\n\t"
101 		// save return registers
102  		"mov   %%eax, %4\n\t"
103  		"mov   %%edx, %5\n\t"
104 		// cleanup stack
105         "mov   %6, %%esp\n\t"
106 		:
107         : "m"(nStackLongs), "m"(pStackLongs), "m"(pThis), "m"(nVtableIndex),
108           "m"(eax), "m"(edx), "m"(stackptr)
109         : "eax", "edx" );
110 	switch( eReturnType )
111 	{
112 		case typelib_TypeClass_HYPER:
113 		case typelib_TypeClass_UNSIGNED_HYPER:
114 			((long*)pRegisterReturn)[1] = edx;
115 		case typelib_TypeClass_LONG:
116 		case typelib_TypeClass_UNSIGNED_LONG:
117 		case typelib_TypeClass_CHAR:
118 		case typelib_TypeClass_ENUM:
119 			((long*)pRegisterReturn)[0] = eax;
120 			break;
121 		case typelib_TypeClass_SHORT:
122 		case typelib_TypeClass_UNSIGNED_SHORT:
123 			*(unsigned short*)pRegisterReturn = eax;
124 			break;
125 		case typelib_TypeClass_BOOLEAN:
126 		case typelib_TypeClass_BYTE:
127 			*(unsigned char*)pRegisterReturn = eax;
128 			break;
129 		case typelib_TypeClass_FLOAT:
130 			asm ( "fstps %0" : : "m"(*(char *)pRegisterReturn) );
131 			break;
132 		case typelib_TypeClass_DOUBLE:
133 			asm ( "fstpl %0\n\t" : : "m"(*(char *)pRegisterReturn) );
134 			break;
135 	}
136 }
137 
138 //==================================================================================================
cpp_call(cppu_unoInterfaceProxy * pThis,sal_Int32 nVtableCall,typelib_TypeDescriptionReference * pReturnTypeRef,sal_Int32 nParams,typelib_MethodParameter * pParams,void * pUnoReturn,void * pUnoArgs[],uno_Any ** ppUnoExc)139 static void cpp_call(
140 	cppu_unoInterfaceProxy * pThis,
141 	sal_Int32 nVtableCall,
142 	typelib_TypeDescriptionReference * pReturnTypeRef,
143 	sal_Int32 nParams, typelib_MethodParameter * pParams,
144 	void * pUnoReturn, void * pUnoArgs[], uno_Any ** ppUnoExc )
145 {
146   	// max space for: [complex ret ptr], values|ptr ...
147   	char * pCppStack		=
148   		(char *)alloca( sizeof(sal_Int32) + ((nParams+2) * sizeof(sal_Int64)) );
149   	char * pCppStackStart	= pCppStack;
150 
151 	// return
152 	typelib_TypeDescription * pReturnTypeDescr = 0;
153 	TYPELIB_DANGER_GET( &pReturnTypeDescr, pReturnTypeRef );
154 	OSL_ENSURE( pReturnTypeDescr, "### expected return type description!" );
155 
156 	void * pCppReturn = 0; // if != 0 && != pUnoReturn, needs reconversion
157 
158 	if (pReturnTypeDescr)
159 	{
160 		if (cppu_isSimpleType( pReturnTypeDescr ))
161 		{
162 			pCppReturn = pUnoReturn; // direct way for simple types
163 		}
164 		else
165 		{
166 			// complex return via ptr
167 			pCppReturn = *(void **)pCppStack = (cppu_relatesToInterface( pReturnTypeDescr )
168 												? alloca( pReturnTypeDescr->nSize )
169 												: pUnoReturn); // direct way
170 			pCppStack += sizeof(void *);
171 		}
172 	}
173 	// push this
174 	*(void**)pCppStack = pThis->pCppI;
175 	pCppStack += sizeof( void* );
176 
177 	// stack space
178 	OSL_ENSURE( sizeof(void *) == sizeof(sal_Int32), "### unexpected size!" );
179 	// args
180 	void ** pCppArgs  = (void **)alloca( 3 * sizeof(void *) * nParams );
181 	// indizes of values this have to be converted (interface conversion cpp<=>uno)
182 	sal_Int32 * pTempIndizes = (sal_Int32 *)(pCppArgs + nParams);
183 	// type descriptions for reconversions
184 	typelib_TypeDescription ** ppTempParamTypeDescr = (typelib_TypeDescription **)(pCppArgs + (2 * nParams));
185 
186 	sal_Int32 nTempIndizes   = 0;
187 
188 	for ( sal_Int32 nPos = 0; nPos < nParams; ++nPos )
189 	{
190 		const typelib_MethodParameter & rParam = pParams[nPos];
191 		typelib_TypeDescription * pParamTypeDescr = 0;
192 		TYPELIB_DANGER_GET( &pParamTypeDescr, rParam.pTypeRef );
193 
194 		if (!rParam.bOut && cppu_isSimpleType( pParamTypeDescr ))
195 		{
196 			uno_copyAndConvertData( pCppArgs[nPos] = pCppStack, pUnoArgs[nPos], pParamTypeDescr,
197 									&pThis->pBridge->aUno2Cpp );
198 
199 			switch (pParamTypeDescr->eTypeClass)
200 			{
201 			case typelib_TypeClass_HYPER:
202 			case typelib_TypeClass_UNSIGNED_HYPER:
203 			case typelib_TypeClass_DOUBLE:
204 				pCppStack += sizeof(sal_Int32); // extra long
205 			}
206 			// no longer needed
207 			TYPELIB_DANGER_RELEASE( pParamTypeDescr );
208 		}
209 		else // ptr to complex value | ref
210 		{
211 			if (! rParam.bIn) // is pure out
212 			{
213 				// cpp out is constructed mem, uno out is not!
214 				uno_constructData(
215 					*(void **)pCppStack = pCppArgs[nPos] = alloca( pParamTypeDescr->nSize ),
216 					pParamTypeDescr );
217 				pTempIndizes[nTempIndizes] = nPos; // default constructed for cpp call
218 				// will be released at reconversion
219 				ppTempParamTypeDescr[nTempIndizes++] = pParamTypeDescr;
220 			}
221 			// is in/inout
222 			else if (cppu_relatesToInterface( pParamTypeDescr ))
223 			{
224 				uno_copyAndConvertData(
225 					*(void **)pCppStack = pCppArgs[nPos] = alloca( pParamTypeDescr->nSize ),
226 					pUnoArgs[nPos], pParamTypeDescr, &pThis->pBridge->aUno2Cpp );
227 
228 				pTempIndizes[nTempIndizes] = nPos; // has to be reconverted
229 				// will be released at reconversion
230 				ppTempParamTypeDescr[nTempIndizes++] = pParamTypeDescr;
231 			}
232 			else // direct way
233 			{
234 				*(void **)pCppStack = pCppArgs[nPos] = pUnoArgs[nPos];
235 				// no longer needed
236 				TYPELIB_DANGER_RELEASE( pParamTypeDescr );
237 			}
238 		}
239 		pCppStack += sizeof(sal_Int32); // standard parameter length
240 	}
241 
242 	try
243 	{
244 		OSL_ENSURE( !( (pCppStack - pCppStackStart ) & 3), "UNALIGNED STACK !!! (Please DO panic)" );
245 		callVirtualMethod(
246 			pThis->pCppI, nVtableCall,
247 			pCppReturn, pReturnTypeDescr->eTypeClass,
248 			(sal_Int32 *)pCppStackStart, (pCppStack - pCppStackStart) / sizeof(sal_Int32) );
249 		// NO exception occurred...
250 		*ppUnoExc = 0;
251 
252 		// reconvert temporary params
253 		for ( ; nTempIndizes--; )
254 		{
255 			sal_Int32 nIndex = pTempIndizes[nTempIndizes];
256 			typelib_TypeDescription * pParamTypeDescr = ppTempParamTypeDescr[nTempIndizes];
257 
258 			if (pParams[nIndex].bIn)
259 			{
260 				if (pParams[nIndex].bOut) // inout
261 				{
262 					uno_destructData( pUnoArgs[nIndex], pParamTypeDescr, 0 ); // destroy uno value
263 					uno_copyAndConvertData( pUnoArgs[nIndex], pCppArgs[nIndex], pParamTypeDescr,
264 											&pThis->pBridge->aCpp2Uno );
265 				}
266 			}
267 			else // pure out
268 			{
269 				uno_copyAndConvertData( pUnoArgs[nIndex], pCppArgs[nIndex], pParamTypeDescr,
270 										&pThis->pBridge->aCpp2Uno );
271 			}
272 			// destroy temp cpp param => cpp: every param was constructed
273 			uno_destructData( pCppArgs[nIndex], pParamTypeDescr, cpp_release );
274 
275 			TYPELIB_DANGER_RELEASE( pParamTypeDescr );
276 		}
277 		// return value
278 		if (pCppReturn && pUnoReturn != pCppReturn)
279 		{
280 			uno_copyAndConvertData( pUnoReturn, pCppReturn, pReturnTypeDescr,
281 									&pThis->pBridge->aCpp2Uno );
282 			uno_destructData( pCppReturn, pReturnTypeDescr, cpp_release );
283 		}
284 	}
285  	catch (...)
286  	{
287   		// fill uno exception
288 		fillUnoException( __cxa_get_globals()->caughtExceptions, *ppUnoExc, &pThis->pBridge->aCpp2Uno );
289 
290 		// temporary params
291 		for ( ; nTempIndizes--; )
292 		{
293 			sal_Int32 nIndex = pTempIndizes[nTempIndizes];
294 			// destroy temp cpp param => cpp: every param was constructed
295 			uno_destructData( pCppArgs[nIndex], ppTempParamTypeDescr[nTempIndizes], cpp_release );
296 			TYPELIB_DANGER_RELEASE( ppTempParamTypeDescr[nTempIndizes] );
297 		}
298 		// return type
299 		if (pReturnTypeDescr)
300 			TYPELIB_DANGER_RELEASE( pReturnTypeDescr );
301 	}
302 }
303 
304 
305 //==================================================================================================
cppu_unoInterfaceProxy_dispatch(uno_Interface * pUnoI,const typelib_TypeDescription * pMemberDescr,void * pReturn,void * pArgs[],uno_Any ** ppException)306 void SAL_CALL cppu_unoInterfaceProxy_dispatch(
307 	uno_Interface * pUnoI, const typelib_TypeDescription * pMemberDescr,
308 	void * pReturn, void * pArgs[], uno_Any ** ppException ) throw ()
309 {
310 	// is my surrogate
311 	cppu_unoInterfaceProxy * pThis = (cppu_unoInterfaceProxy *)pUnoI;
312 	typelib_InterfaceTypeDescription * pTypeDescr = pThis->pTypeDescr;
313 
314 	switch (pMemberDescr->eTypeClass)
315 	{
316 	case typelib_TypeClass_INTERFACE_ATTRIBUTE:
317 	{
318 		// determine vtable call index
319 		sal_Int32 nMemberPos = ((typelib_InterfaceMemberTypeDescription *)pMemberDescr)->nPosition;
320 		OSL_ENSURE( nMemberPos < pTypeDescr->nAllMembers, "### member pos out of range!" );
321 
322 		sal_Int32 nVtableCall = pTypeDescr->pMapMemberIndexToFunctionIndex[nMemberPos];
323 		OSL_ENSURE( nVtableCall < pTypeDescr->nMapFunctionIndexToMemberIndex, "### illegal vtable index!" );
324 
325 		if (pReturn)
326 		{
327 			// dependent dispatch
328 			cpp_call(
329 				pThis, nVtableCall,
330 				((typelib_InterfaceAttributeTypeDescription *)pMemberDescr)->pAttributeTypeRef,
331 				0, 0, // no params
332 				pReturn, pArgs, ppException );
333 		}
334 		else
335 		{
336 			// is SET
337 			typelib_MethodParameter aParam;
338 			aParam.pTypeRef =
339 				((typelib_InterfaceAttributeTypeDescription *)pMemberDescr)->pAttributeTypeRef;
340 			aParam.bIn		= sal_True;
341 			aParam.bOut		= sal_False;
342 
343 			typelib_TypeDescriptionReference * pReturnTypeRef = 0;
344 			OUString aVoidName( RTL_CONSTASCII_USTRINGPARAM("void") );
345 			typelib_typedescriptionreference_new(
346 				&pReturnTypeRef, typelib_TypeClass_VOID, aVoidName.pData );
347 
348 			// dependent dispatch
349 			cpp_call(
350 				pThis, nVtableCall +1, // get, then set method
351 				pReturnTypeRef,
352 				1, &aParam,
353 				pReturn, pArgs, ppException );
354 
355 			typelib_typedescriptionreference_release( pReturnTypeRef );
356 		}
357 
358 		break;
359 	}
360 	case typelib_TypeClass_INTERFACE_METHOD:
361 	{
362 		// determine vtable call index
363 		sal_Int32 nMemberPos = ((typelib_InterfaceMemberTypeDescription *)pMemberDescr)->nPosition;
364 		OSL_ENSURE( nMemberPos < pTypeDescr->nAllMembers, "### member pos out of range!" );
365 
366 		sal_Int32 nVtableCall = pTypeDescr->pMapMemberIndexToFunctionIndex[nMemberPos];
367 		OSL_ENSURE( nVtableCall < pTypeDescr->nMapFunctionIndexToMemberIndex, "### illegal vtable index!" );
368 
369 		switch (nVtableCall)
370 		{
371 			// standard calls
372 		case 1: // acquire uno interface
373 			(*pUnoI->acquire)( pUnoI );
374 			*ppException = 0;
375 			break;
376 		case 2: // release uno interface
377 			(*pUnoI->release)( pUnoI );
378 			*ppException = 0;
379 			break;
380 		case 0: // queryInterface() opt
381 		{
382 			typelib_TypeDescription * pTD = 0;
383 			TYPELIB_DANGER_GET( &pTD, reinterpret_cast< Type * >( pArgs[0] )->getTypeLibType() );
384 			if (pTD)
385 			{
386                 uno_Interface * pInterface = 0;
387                 (*pThis->pBridge->pUnoEnv->getRegisteredInterface)(
388                     pThis->pBridge->pUnoEnv,
389                     (void **)&pInterface, pThis->oid.pData, (typelib_InterfaceTypeDescription *)pTD );
390 
391                 if (pInterface)
392                 {
393                     ::uno_any_construct(
394                         reinterpret_cast< uno_Any * >( pReturn ),
395                         &pInterface, pTD, 0 );
396                     (*pInterface->release)( pInterface );
397                     TYPELIB_DANGER_RELEASE( pTD );
398                     *ppException = 0;
399                     break;
400                 }
401                 TYPELIB_DANGER_RELEASE( pTD );
402             }
403 		} // else perform queryInterface()
404 		default:
405 			// dependent dispatch
406 			cpp_call(
407 				pThis, nVtableCall,
408 				((typelib_InterfaceMethodTypeDescription *)pMemberDescr)->pReturnTypeRef,
409 				((typelib_InterfaceMethodTypeDescription *)pMemberDescr)->nParams,
410 				((typelib_InterfaceMethodTypeDescription *)pMemberDescr)->pParams,
411 				pReturn, pArgs, ppException );
412 		}
413 		break;
414 	}
415 	default:
416 	{
417 		::com::sun::star::uno::RuntimeException aExc(
418 			OUString( RTL_CONSTASCII_USTRINGPARAM("illegal member type description!") ),
419 			::com::sun::star::uno::Reference< ::com::sun::star::uno::XInterface >() );
420 
421 		Type const & rExcType = ::getCppuType( &aExc );
422 		// binary identical null reference
423 		::uno_type_any_construct( *ppException, &aExc, rExcType.getTypeLibType(), 0 );
424 	}
425 	}
426 }
427 
428 }
429 
430