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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 <stdlib.h>
28 
29 #include <com/sun/star/uno/genfunc.hxx>
30 #include "com/sun/star/uno/RuntimeException.hpp"
31 #include <uno/data.h>
32 
33 #include "bridges/cpp_uno/shared/bridge.hxx"
34 #include "bridges/cpp_uno/shared/types.hxx"
35 #include "bridges/cpp_uno/shared/unointerfaceproxy.hxx"
36 #include "bridges/cpp_uno/shared/vtables.hxx"
37 
38 #include "share.hxx"
39 
40 using namespace ::rtl;
41 using namespace ::com::sun::star::uno;
42 
43 namespace
44 {
45 
46 //==================================================================================================
47 // The call instruction within the asm section of callVirtualMethod may throw
48 // exceptions.  So that the compiler handles this correctly, it is important
49 // that (a) callVirtualMethod might call dummy_can_throw_anything (although this
50 // never happens at runtime), which in turn can throw exceptions, and (b)
51 // callVirtualMethod is not inlined at its call site (so that any exceptions are
52 // caught which are thrown from the instruction calling callVirtualMethod):
53 void callVirtualMethod(
54     void * pAdjustedThisPtr,
55     sal_Int32 nVtableIndex,
56     void * pRegisterReturn,
57     typelib_TypeClass eReturnType,
58     sal_Int32 * pStackLongs,
59     sal_Int32 nStackLongs ) __attribute__((noinline));
60 
61 void callVirtualMethod(
62     void * pAdjustedThisPtr,
63     sal_Int32 nVtableIndex,
64     void * pRegisterReturn,
65     typelib_TypeClass eReturnType,
66     sal_Int32 * pStackLongs,
67     sal_Int32 nStackLongs )
68 {
69 	// parameter list is mixed list of * and values
70 	// reference parameters are pointers
71 
72 	OSL_ENSURE( pStackLongs && pAdjustedThisPtr, "### null ptr!" );
73 	OSL_ENSURE( (sizeof(void *) == 4) && (sizeof(sal_Int32) == 4), "### unexpected size of int!" );
74 	OSL_ENSURE( nStackLongs && pStackLongs, "### no stack in callVirtualMethod !" );
75 
76     // never called
77     if (! pAdjustedThisPtr) CPPU_CURRENT_NAMESPACE::dummy_can_throw_anything("xxx"); // address something
78 
79 	volatile long edx = 0, eax = 0; // for register returns
80     void * stackptr;
81 	asm volatile (
82         "mov   %%esp, %6\n\t"
83         // preserve potential 128bit stack alignment
84         "and   $0xfffffff0, %%esp\n\t"
85         "mov   %0, %%eax\n\t"
86         "lea   -4(,%%eax,4), %%eax\n\t"
87         "and   $0xf, %%eax\n\t"
88         "sub   $0xc, %%eax\n\t"
89         "add   %%eax, %%esp\n\t"
90 		// copy values
91 		"mov   %0, %%eax\n\t"
92 		"mov   %%eax, %%edx\n\t"
93 		"dec   %%edx\n\t"
94 		"shl   $2, %%edx\n\t"
95 		"add   %1, %%edx\n"
96 		"Lcopy:\n\t"
97 		"pushl 0(%%edx)\n\t"
98 		"sub   $4, %%edx\n\t"
99 		"dec   %%eax\n\t"
100 		"jne   Lcopy\n\t"
101 		// do the actual call
102 		"mov   %2, %%edx\n\t"
103 		"mov   0(%%edx), %%edx\n\t"
104 		"mov   %3, %%eax\n\t"
105 		"shl   $2, %%eax\n\t"
106 		"add   %%eax, %%edx\n\t"
107 		"mov   0(%%edx), %%edx\n\t"
108 		"call  *%%edx\n\t"
109 		// save return registers
110  		"mov   %%eax, %4\n\t"
111  		"mov   %%edx, %5\n\t"
112 		// cleanup stack
113         "mov   %6, %%esp\n\t"
114 		:
115         : "m"(nStackLongs), "m"(pStackLongs), "m"(pAdjustedThisPtr),
116           "m"(nVtableIndex), "m"(eax), "m"(edx), "m"(stackptr)
117         : "eax", "edx" );
118 	switch( eReturnType )
119 	{
120 		case typelib_TypeClass_HYPER:
121 		case typelib_TypeClass_UNSIGNED_HYPER:
122 			((long*)pRegisterReturn)[1] = edx;
123 		case typelib_TypeClass_LONG:
124 		case typelib_TypeClass_UNSIGNED_LONG:
125 		case typelib_TypeClass_CHAR:
126 		case typelib_TypeClass_ENUM:
127 			((long*)pRegisterReturn)[0] = eax;
128 			break;
129 		case typelib_TypeClass_SHORT:
130 		case typelib_TypeClass_UNSIGNED_SHORT:
131 			*(unsigned short*)pRegisterReturn = eax;
132 			break;
133 		case typelib_TypeClass_BOOLEAN:
134 		case typelib_TypeClass_BYTE:
135 			*(unsigned char*)pRegisterReturn = eax;
136 			break;
137 		case typelib_TypeClass_FLOAT:
138 			asm ( "fstps %0" : : "m"(*(char *)pRegisterReturn) );
139 			break;
140 		case typelib_TypeClass_DOUBLE:
141 			asm ( "fstpl %0\n\t" : : "m"(*(char *)pRegisterReturn) );
142 			break;
143         default:
144             break;
145 	}
146 }
147 
148 //==================================================================================================
149 static void cpp_call(
150 	bridges::cpp_uno::shared::UnoInterfaceProxy * pThis,
151     bridges::cpp_uno::shared::VtableSlot aVtableSlot,
152 	typelib_TypeDescriptionReference * pReturnTypeRef,
153 	sal_Int32 nParams, typelib_MethodParameter * pParams,
154 	void * pUnoReturn, void * pUnoArgs[], uno_Any ** ppUnoExc )
155 {
156   	// max space for: [complex ret ptr], values|ptr ...
157   	char * pCppStack		=
158   		(char *)alloca( sizeof(sal_Int32) + ((nParams+2) * sizeof(sal_Int64)) );
159   	char * pCppStackStart	= pCppStack;
160 
161 	// return
162 	typelib_TypeDescription * pReturnTypeDescr = 0;
163 	TYPELIB_DANGER_GET( &pReturnTypeDescr, pReturnTypeRef );
164 	OSL_ENSURE( pReturnTypeDescr, "### expected return type description!" );
165 
166 	void * pCppReturn = 0; // if != 0 && != pUnoReturn, needs reconversion
167 
168 	if (pReturnTypeDescr)
169 	{
170 		if (bridges::cpp_uno::shared::isSimpleType( pReturnTypeDescr ))
171 		{
172 			pCppReturn = pUnoReturn; // direct way for simple types
173 		}
174 		else
175 		{
176 			// complex return via ptr
177 			pCppReturn = *(void **)pCppStack
178                 = (bridges::cpp_uno::shared::relatesToInterfaceType(
179                        pReturnTypeDescr )
180                    ? alloca( pReturnTypeDescr->nSize )
181                    : pUnoReturn); // direct way
182 			pCppStack += sizeof(void *);
183 		}
184 	}
185 	// push this
186     void * pAdjustedThisPtr = reinterpret_cast< void ** >(pThis->getCppI())
187         + aVtableSlot.offset;
188 	*(void**)pCppStack = pAdjustedThisPtr;
189 	pCppStack += sizeof( void* );
190 
191 	// stack space
192 	OSL_ENSURE( sizeof(void *) == sizeof(sal_Int32), "### unexpected size!" );
193 	// args
194 	void ** pCppArgs  = (void **)alloca( 3 * sizeof(void *) * nParams );
195 	// indizes of values this have to be converted (interface conversion cpp<=>uno)
196 	sal_Int32 * pTempIndizes = (sal_Int32 *)(pCppArgs + nParams);
197 	// type descriptions for reconversions
198 	typelib_TypeDescription ** ppTempParamTypeDescr = (typelib_TypeDescription **)(pCppArgs + (2 * nParams));
199 
200 	sal_Int32 nTempIndizes   = 0;
201 
202 	for ( sal_Int32 nPos = 0; nPos < nParams; ++nPos )
203 	{
204 		const typelib_MethodParameter & rParam = pParams[nPos];
205 		typelib_TypeDescription * pParamTypeDescr = 0;
206 		TYPELIB_DANGER_GET( &pParamTypeDescr, rParam.pTypeRef );
207 
208 		if (!rParam.bOut
209             && bridges::cpp_uno::shared::isSimpleType( pParamTypeDescr ))
210 		{
211 			uno_copyAndConvertData( pCppArgs[nPos] = pCppStack, pUnoArgs[nPos], pParamTypeDescr,
212 									pThis->getBridge()->getUno2Cpp() );
213 
214 			switch (pParamTypeDescr->eTypeClass)
215 			{
216 			case typelib_TypeClass_HYPER:
217 			case typelib_TypeClass_UNSIGNED_HYPER:
218 			case typelib_TypeClass_DOUBLE:
219 				pCppStack += sizeof(sal_Int32); // extra long
220                 break;
221             default:
222                 break;
223 			}
224 			// no longer needed
225 			TYPELIB_DANGER_RELEASE( pParamTypeDescr );
226 		}
227 		else // ptr to complex value | ref
228 		{
229 			if (! rParam.bIn) // is pure out
230 			{
231 				// cpp out is constructed mem, uno out is not!
232 				uno_constructData(
233 					*(void **)pCppStack = pCppArgs[nPos] = alloca( pParamTypeDescr->nSize ),
234 					pParamTypeDescr );
235 				pTempIndizes[nTempIndizes] = nPos; // default constructed for cpp call
236 				// will be released at reconversion
237 				ppTempParamTypeDescr[nTempIndizes++] = pParamTypeDescr;
238 			}
239 			// is in/inout
240 			else if (bridges::cpp_uno::shared::relatesToInterfaceType(
241                          pParamTypeDescr ))
242 			{
243 				uno_copyAndConvertData(
244 					*(void **)pCppStack = pCppArgs[nPos] = alloca( pParamTypeDescr->nSize ),
245 					pUnoArgs[nPos], pParamTypeDescr,
246                     pThis->getBridge()->getUno2Cpp() );
247 
248 				pTempIndizes[nTempIndizes] = nPos; // has to be reconverted
249 				// will be released at reconversion
250 				ppTempParamTypeDescr[nTempIndizes++] = pParamTypeDescr;
251 			}
252 			else // direct way
253 			{
254 				*(void **)pCppStack = pCppArgs[nPos] = pUnoArgs[nPos];
255 				// no longer needed
256 				TYPELIB_DANGER_RELEASE( pParamTypeDescr );
257 			}
258 		}
259 		pCppStack += sizeof(sal_Int32); // standard parameter length
260 	}
261 
262 	try
263 	{
264 		OSL_ENSURE( !( (pCppStack - pCppStackStart ) & 3), "UNALIGNED STACK !!! (Please DO panic)" );
265 		callVirtualMethod(
266 			pAdjustedThisPtr, aVtableSlot.index,
267 			pCppReturn, pReturnTypeDescr->eTypeClass,
268 			(sal_Int32 *)pCppStackStart, (pCppStack - pCppStackStart) / sizeof(sal_Int32) );
269 		// NO exception occured...
270 		*ppUnoExc = 0;
271 
272 		// reconvert temporary params
273 		for ( ; nTempIndizes--; )
274 		{
275 			sal_Int32 nIndex = pTempIndizes[nTempIndizes];
276 			typelib_TypeDescription * pParamTypeDescr = ppTempParamTypeDescr[nTempIndizes];
277 
278 			if (pParams[nIndex].bIn)
279 			{
280 				if (pParams[nIndex].bOut) // inout
281 				{
282 					uno_destructData( pUnoArgs[nIndex], pParamTypeDescr, 0 ); // destroy uno value
283 					uno_copyAndConvertData( pUnoArgs[nIndex], pCppArgs[nIndex], pParamTypeDescr,
284 											pThis->getBridge()->getCpp2Uno() );
285 				}
286 			}
287 			else // pure out
288 			{
289 				uno_copyAndConvertData( pUnoArgs[nIndex], pCppArgs[nIndex], pParamTypeDescr,
290 										pThis->getBridge()->getCpp2Uno() );
291 			}
292 			// destroy temp cpp param => cpp: every param was constructed
293 			uno_destructData( pCppArgs[nIndex], pParamTypeDescr, cpp_release );
294 
295 			TYPELIB_DANGER_RELEASE( pParamTypeDescr );
296 		}
297 		// return value
298 		if (pCppReturn && pUnoReturn != pCppReturn)
299 		{
300 			uno_copyAndConvertData( pUnoReturn, pCppReturn, pReturnTypeDescr,
301 									pThis->getBridge()->getCpp2Uno() );
302 			uno_destructData( pCppReturn, pReturnTypeDescr, cpp_release );
303 		}
304 	}
305  	catch (...)
306  	{
307   		// fill uno exception
308 		fillUnoException( CPPU_CURRENT_NAMESPACE::__cxa_get_globals()->caughtExceptions, *ppUnoExc, pThis->getBridge()->getCpp2Uno() );
309 
310 		// temporary params
311 		for ( ; nTempIndizes--; )
312 		{
313 			sal_Int32 nIndex = pTempIndizes[nTempIndizes];
314 			// destroy temp cpp param => cpp: every param was constructed
315 			uno_destructData( pCppArgs[nIndex], ppTempParamTypeDescr[nTempIndizes], cpp_release );
316 			TYPELIB_DANGER_RELEASE( ppTempParamTypeDescr[nTempIndizes] );
317 		}
318 		// return type
319 		if (pReturnTypeDescr)
320 			TYPELIB_DANGER_RELEASE( pReturnTypeDescr );
321 	}
322 }
323 
324 }
325 
326 namespace bridges { namespace cpp_uno { namespace shared {
327 
328 void unoInterfaceProxyDispatch(
329 	uno_Interface * pUnoI, const typelib_TypeDescription * pMemberDescr,
330     void * pReturn, void * pArgs[], uno_Any ** ppException )
331 {
332 	// is my surrogate
333 	bridges::cpp_uno::shared::UnoInterfaceProxy * pThis
334         = static_cast< bridges::cpp_uno::shared::UnoInterfaceProxy * >(pUnoI);
335 
336 	switch (pMemberDescr->eTypeClass)
337 	{
338 	case typelib_TypeClass_INTERFACE_ATTRIBUTE:
339 	{
340         VtableSlot aVtableSlot(
341             getVtableSlot(
342                 reinterpret_cast<
343                     typelib_InterfaceAttributeTypeDescription const * >(
344                         pMemberDescr)));
345 		if (pReturn)
346 		{
347 			// dependent dispatch
348 			cpp_call(
349 				pThis, aVtableSlot,
350 				((typelib_InterfaceAttributeTypeDescription *)pMemberDescr)->pAttributeTypeRef,
351 				0, 0, // no params
352 				pReturn, pArgs, ppException );
353 		}
354 		else
355 		{
356 			// is SET
357 			typelib_MethodParameter aParam;
358 			aParam.pTypeRef =
359 				((typelib_InterfaceAttributeTypeDescription *)pMemberDescr)->pAttributeTypeRef;
360 			aParam.bIn		= sal_True;
361 			aParam.bOut		= sal_False;
362 
363 			typelib_TypeDescriptionReference * pReturnTypeRef = 0;
364 			OUString aVoidName( RTL_CONSTASCII_USTRINGPARAM("void") );
365 			typelib_typedescriptionreference_new(
366 				&pReturnTypeRef, typelib_TypeClass_VOID, aVoidName.pData );
367 
368 			// dependent dispatch
369             aVtableSlot.index += 1; // get, then set method
370 			cpp_call(
371 				pThis, aVtableSlot,
372 				pReturnTypeRef,
373 				1, &aParam,
374 				pReturn, pArgs, ppException );
375 
376 			typelib_typedescriptionreference_release( pReturnTypeRef );
377 		}
378 
379 		break;
380 	}
381 	case typelib_TypeClass_INTERFACE_METHOD:
382 	{
383         VtableSlot aVtableSlot(
384             getVtableSlot(
385                 reinterpret_cast<
386                     typelib_InterfaceMethodTypeDescription const * >(
387                         pMemberDescr)));
388 		switch (aVtableSlot.index)
389 		{
390 			// standard calls
391 		case 1: // acquire uno interface
392 			(*pUnoI->acquire)( pUnoI );
393 			*ppException = 0;
394 			break;
395 		case 2: // release uno interface
396 			(*pUnoI->release)( pUnoI );
397 			*ppException = 0;
398 			break;
399 		case 0: // queryInterface() opt
400 		{
401 			typelib_TypeDescription * pTD = 0;
402 			TYPELIB_DANGER_GET( &pTD, reinterpret_cast< Type * >( pArgs[0] )->getTypeLibType() );
403 			if (pTD)
404 			{
405                 uno_Interface * pInterface = 0;
406                 (*pThis->pBridge->getUnoEnv()->getRegisteredInterface)(
407                     pThis->pBridge->getUnoEnv(),
408                     (void **)&pInterface, pThis->oid.pData, (typelib_InterfaceTypeDescription *)pTD );
409 
410                 if (pInterface)
411                 {
412                     ::uno_any_construct(
413                         reinterpret_cast< uno_Any * >( pReturn ),
414                         &pInterface, pTD, 0 );
415                     (*pInterface->release)( pInterface );
416                     TYPELIB_DANGER_RELEASE( pTD );
417                     *ppException = 0;
418                     break;
419                 }
420                 TYPELIB_DANGER_RELEASE( pTD );
421             }
422 		} // else perform queryInterface()
423 		default:
424 			// dependent dispatch
425 			cpp_call(
426 				pThis, aVtableSlot,
427 				((typelib_InterfaceMethodTypeDescription *)pMemberDescr)->pReturnTypeRef,
428 				((typelib_InterfaceMethodTypeDescription *)pMemberDescr)->nParams,
429 				((typelib_InterfaceMethodTypeDescription *)pMemberDescr)->pParams,
430 				pReturn, pArgs, ppException );
431 		}
432 		break;
433 	}
434 	default:
435 	{
436 		::com::sun::star::uno::RuntimeException aExc(
437 			OUString( RTL_CONSTASCII_USTRINGPARAM("illegal member type description!") ),
438 			::com::sun::star::uno::Reference< ::com::sun::star::uno::XInterface >() );
439 
440 		Type const & rExcType = ::getCppuType( &aExc );
441 		// binary identical null reference
442 		::uno_type_any_construct( *ppException, &aExc, rExcType.getTypeLibType(), 0 );
443 	}
444 	}
445 }
446 
447 } } }
448