1 /**************************************************************
2 *
3 * Licensed to the Apache Software Foundation (ASF) under one
4 * or more contributor license agreements. See the NOTICE file
5 * distributed with this work for additional information
6 * regarding copyright ownership. The ASF licenses this file
7 * to you under the Apache License, Version 2.0 (the
8 * "License"); you may not use this file except in compliance
9 * with the License. You may obtain a copy of the License at
10 *
11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing,
14 * software distributed under the License is distributed on an
15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16 * KIND, either express or implied. See the License for the
17 * specific language governing permissions and limitations
18 * under the License.
19 *
20 *************************************************************/
21
22
23
24 #include <malloc.h>
25 #include <sal/alloca.h>
26
27 #include <com/sun/star/uno/genfunc.hxx>
28 #include "com/sun/star/uno/RuntimeException.hpp"
29 #include <uno/data.h>
30
31 #include "bridges/cpp_uno/shared/bridge.hxx"
32 #include "bridges/cpp_uno/shared/types.hxx"
33 #include "bridges/cpp_uno/shared/unointerfaceproxy.hxx"
34 #include "bridges/cpp_uno/shared/vtables.hxx"
35
36 #include "share.hxx"
37
38 using namespace ::rtl;
39 using namespace ::com::sun::star::uno;
40
41 namespace
42 {
43
44 //==================================================================================================
45 // The call instruction within the asm section of callVirtualMethod may throw
46 // exceptions. So that the compiler handles this correctly, it is important
47 // that (a) callVirtualMethod might call dummy_can_throw_anything (although this
48 // never happens at runtime), which in turn can throw exceptions, and (b)
49 // callVirtualMethod is not inlined at its call site (so that any exceptions are
50 // caught which are thrown from the instruction calling callVirtualMethod):
51 static void callVirtualMethod(
52 void * pAdjustedThisPtr,
53 sal_Int32 nVtableIndex,
54 void * pRegisterReturn,
55 typelib_TypeClass eReturnType,
56 sal_Int32 * pStackLongs,
57 sal_Int32 nStackLongs );
58 // __attribute__((noinline));
59
60 //==================================================================================================
callVirtualMethod(void * pAdjustedThisPtr,sal_Int32 nVtableIndex,void * pRegisterReturn,typelib_TypeClass eReturnType,sal_Int32 * pStackLongs,sal_Int32 nStackLongs)61 static 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 /* figure out the address of the function we need to invoke */
80 unsigned long * mfunc; // actual function to be invoked
81 int off; // offset used to find function
82 void (*ptr)();
83 off = nVtableIndex;
84 off = off * 4; // 4 bytes per slot
85 mfunc = *((unsigned long **)pAdjustedThisPtr); // get the address of the vtable
86 mfunc = (unsigned long *)((char *)mfunc + off); // get the address from the vtable entry at offset
87 mfunc = *((unsigned long **)mfunc); // the function is stored at the address
88 ptr = (void (*)())mfunc;
89
90 volatile long edx = 0, eax = 0; // for register returns
91 void * stackptr;
92 asm volatile (
93 "mov %%esp, %6\n\t"
94 // copy values
95 "mov %0, %%eax\n\t"
96 "mov %%eax, %%edx\n\t"
97 "dec %%edx\n\t"
98 "shl $2, %%edx\n\t"
99 "add %1, %%edx\n"
100 "Lcopy:\n\t"
101 "pushl 0(%%edx)\n\t"
102 "sub $4, %%edx\n\t"
103 "dec %%eax\n\t"
104 "jne Lcopy\n\t"
105 :
106 : "m"(nStackLongs), "m"(pStackLongs), "m"(pAdjustedThisPtr),
107 "m"(nVtableIndex), "m"(eax), "m"(edx), "m"(stackptr)
108 : "eax", "edx" );
109
110 (*ptr)();
111
112 asm volatile (
113 // save return registers
114 "mov %%eax, %4\n\t"
115 "mov %%edx, %5\n\t"
116 // cleanup stack
117 "mov %6, %%esp\n\t"
118 :
119 : "m"(nStackLongs), "m"(pStackLongs), "m"(pAdjustedThisPtr),
120 "m"(nVtableIndex), "m"(eax), "m"(edx), "m"(stackptr)
121 : "eax", "edx" );
122 switch( eReturnType )
123 {
124 case typelib_TypeClass_HYPER:
125 case typelib_TypeClass_UNSIGNED_HYPER:
126 ((long*)pRegisterReturn)[1] = edx;
127 case typelib_TypeClass_LONG:
128 case typelib_TypeClass_UNSIGNED_LONG:
129 case typelib_TypeClass_CHAR:
130 case typelib_TypeClass_ENUM:
131 ((long*)pRegisterReturn)[0] = eax;
132 break;
133 case typelib_TypeClass_SHORT:
134 case typelib_TypeClass_UNSIGNED_SHORT:
135 *(unsigned short*)pRegisterReturn = eax;
136 break;
137 case typelib_TypeClass_BOOLEAN:
138 case typelib_TypeClass_BYTE:
139 *(unsigned char*)pRegisterReturn = eax;
140 break;
141 case typelib_TypeClass_FLOAT:
142 asm ( "fstps %0" : : "m"(*(char *)pRegisterReturn) );
143 break;
144 case typelib_TypeClass_DOUBLE:
145 asm ( "fstpl %0\n\t" : : "m"(*(char *)pRegisterReturn) );
146 break;
147 }
148 }
149
150 //==================================================================================================
cpp_call(bridges::cpp_uno::shared::UnoInterfaceProxy * pThis,bridges::cpp_uno::shared::VtableSlot aVtableSlot,typelib_TypeDescriptionReference * pReturnTypeRef,sal_Int32 nParams,typelib_MethodParameter * pParams,void * pUnoReturn,void * pUnoArgs[],uno_Any ** ppUnoExc)151 static void cpp_call(
152 bridges::cpp_uno::shared::UnoInterfaceProxy * pThis,
153 bridges::cpp_uno::shared::VtableSlot aVtableSlot,
154 typelib_TypeDescriptionReference * pReturnTypeRef,
155 sal_Int32 nParams, typelib_MethodParameter * pParams,
156 void * pUnoReturn, void * pUnoArgs[], uno_Any ** ppUnoExc )
157 {
158 // max space for: [complex ret ptr], values|ptr ...
159 char * pCppStack =
160 (char *)alloca( sizeof(sal_Int32) + ((nParams+2) * sizeof(sal_Int64)) );
161 char * pCppStackStart = pCppStack;
162
163 // return
164 typelib_TypeDescription * pReturnTypeDescr = 0;
165 TYPELIB_DANGER_GET( &pReturnTypeDescr, pReturnTypeRef );
166 OSL_ENSURE( pReturnTypeDescr, "### expected return type description!" );
167
168 void * pCppReturn = 0; // if != 0 && != pUnoReturn, needs reconversion
169
170 if (pReturnTypeDescr)
171 {
172 if (bridges::cpp_uno::shared::isSimpleType( pReturnTypeDescr ))
173 {
174 pCppReturn = pUnoReturn; // direct way for simple types
175 }
176 else
177 {
178 // complex return via ptr
179 pCppReturn = *(void **)pCppStack
180 = (bridges::cpp_uno::shared::relatesToInterfaceType(
181 pReturnTypeDescr )
182 ? alloca( pReturnTypeDescr->nSize )
183 : pUnoReturn); // direct way
184 pCppStack += sizeof(void *);
185 }
186 }
187 // push this
188 void * pAdjustedThisPtr = reinterpret_cast< void ** >(pThis->getCppI())
189 + aVtableSlot.offset;
190 *(void**)pCppStack = pAdjustedThisPtr;
191 pCppStack += sizeof( void* );
192
193 // stack space
194 OSL_ENSURE( sizeof(void *) == sizeof(sal_Int32), "### unexpected size!" );
195 // args
196 void ** pCppArgs = (void **)alloca( 3 * sizeof(void *) * nParams );
197 // indizes of values this have to be converted (interface conversion cpp<=>uno)
198 sal_Int32 * pTempIndizes = (sal_Int32 *)(pCppArgs + nParams);
199 // type descriptions for reconversions
200 typelib_TypeDescription ** ppTempParamTypeDescr = (typelib_TypeDescription **)(pCppArgs + (2 * nParams));
201
202 sal_Int32 nTempIndizes = 0;
203
204 for ( sal_Int32 nPos = 0; nPos < nParams; ++nPos )
205 {
206 const typelib_MethodParameter & rParam = pParams[nPos];
207 typelib_TypeDescription * pParamTypeDescr = 0;
208 TYPELIB_DANGER_GET( &pParamTypeDescr, rParam.pTypeRef );
209
210 if (!rParam.bOut
211 && bridges::cpp_uno::shared::isSimpleType( pParamTypeDescr ))
212 {
213 uno_copyAndConvertData( pCppArgs[nPos] = pCppStack, pUnoArgs[nPos], pParamTypeDescr,
214 pThis->getBridge()->getUno2Cpp() );
215
216 switch (pParamTypeDescr->eTypeClass)
217 {
218 case typelib_TypeClass_HYPER:
219 case typelib_TypeClass_UNSIGNED_HYPER:
220 case typelib_TypeClass_DOUBLE:
221 pCppStack += sizeof(sal_Int32); // extra long
222 }
223 // no longer needed
224 TYPELIB_DANGER_RELEASE( pParamTypeDescr );
225 }
226 else // ptr to complex value | ref
227 {
228 if (! rParam.bIn) // is pure out
229 {
230 // cpp out is constructed mem, uno out is not!
231 uno_constructData(
232 *(void **)pCppStack = pCppArgs[nPos] = alloca( pParamTypeDescr->nSize ),
233 pParamTypeDescr );
234 pTempIndizes[nTempIndizes] = nPos; // default constructed for cpp call
235 // will be released at reconversion
236 ppTempParamTypeDescr[nTempIndizes++] = pParamTypeDescr;
237 }
238 // is in/inout
239 else if (bridges::cpp_uno::shared::relatesToInterfaceType(
240 pParamTypeDescr ))
241 {
242 uno_copyAndConvertData(
243 *(void **)pCppStack = pCppArgs[nPos] = alloca( pParamTypeDescr->nSize ),
244 pUnoArgs[nPos], pParamTypeDescr,
245 pThis->getBridge()->getUno2Cpp() );
246
247 pTempIndizes[nTempIndizes] = nPos; // has to be reconverted
248 // will be released at reconversion
249 ppTempParamTypeDescr[nTempIndizes++] = pParamTypeDescr;
250 }
251 else // direct way
252 {
253 *(void **)pCppStack = pCppArgs[nPos] = pUnoArgs[nPos];
254 // no longer needed
255 TYPELIB_DANGER_RELEASE( pParamTypeDescr );
256 }
257 }
258 pCppStack += sizeof(sal_Int32); // standard parameter length
259 }
260
261 try
262 {
263 OSL_ENSURE( !( (pCppStack - pCppStackStart ) & 3), "UNALIGNED STACK !!! (Please DO panic)" );
264 callVirtualMethod(
265 pAdjustedThisPtr, aVtableSlot.index,
266 pCppReturn, pReturnTypeDescr->eTypeClass,
267 (sal_Int32 *)pCppStackStart, (pCppStack - pCppStackStart) / sizeof(sal_Int32) );
268 // NO exception occured...
269 *ppUnoExc = 0;
270
271 // reconvert temporary params
272 for ( ; nTempIndizes--; )
273 {
274 sal_Int32 nIndex = pTempIndizes[nTempIndizes];
275 typelib_TypeDescription * pParamTypeDescr = ppTempParamTypeDescr[nTempIndizes];
276
277 if (pParams[nIndex].bIn)
278 {
279 if (pParams[nIndex].bOut) // inout
280 {
281 uno_destructData( pUnoArgs[nIndex], pParamTypeDescr, 0 ); // destroy uno value
282 uno_copyAndConvertData( pUnoArgs[nIndex], pCppArgs[nIndex], pParamTypeDescr,
283 pThis->getBridge()->getCpp2Uno() );
284 }
285 }
286 else // pure out
287 {
288 uno_copyAndConvertData( pUnoArgs[nIndex], pCppArgs[nIndex], pParamTypeDescr,
289 pThis->getBridge()->getCpp2Uno() );
290 }
291 // destroy temp cpp param => cpp: every param was constructed
292 uno_destructData( pCppArgs[nIndex], pParamTypeDescr, cpp_release );
293
294 TYPELIB_DANGER_RELEASE( pParamTypeDescr );
295 }
296 // return value
297 if (pCppReturn && pUnoReturn != pCppReturn)
298 {
299 uno_copyAndConvertData( pUnoReturn, pCppReturn, pReturnTypeDescr,
300 pThis->getBridge()->getCpp2Uno() );
301 uno_destructData( pCppReturn, pReturnTypeDescr, cpp_release );
302 }
303 }
304 catch (...)
305 {
306 // fill uno exception
307 fillUnoException( CPPU_CURRENT_NAMESPACE::__cxa_get_globals()->caughtExceptions, *ppUnoExc, pThis->getBridge()->getCpp2Uno() );
308
309 // temporary params
310 for ( ; nTempIndizes--; )
311 {
312 sal_Int32 nIndex = pTempIndizes[nTempIndizes];
313 // destroy temp cpp param => cpp: every param was constructed
314 uno_destructData( pCppArgs[nIndex], ppTempParamTypeDescr[nTempIndizes], cpp_release );
315 TYPELIB_DANGER_RELEASE( ppTempParamTypeDescr[nTempIndizes] );
316 }
317 // return type
318 if (pReturnTypeDescr)
319 TYPELIB_DANGER_RELEASE( pReturnTypeDescr );
320 }
321 }
322
323 }
324
325 namespace bridges { namespace cpp_uno { namespace shared {
326
unoInterfaceProxyDispatch(uno_Interface * pUnoI,const typelib_TypeDescription * pMemberDescr,void * pReturn,void * pArgs[],uno_Any ** ppException)327 void unoInterfaceProxyDispatch(
328 uno_Interface * pUnoI, const typelib_TypeDescription * pMemberDescr,
329 void * pReturn, void * pArgs[], uno_Any ** ppException )
330 {
331 // is my surrogate
332 bridges::cpp_uno::shared::UnoInterfaceProxy * pThis
333 = static_cast< bridges::cpp_uno::shared::UnoInterfaceProxy * >(pUnoI);
334 typelib_InterfaceTypeDescription * pTypeDescr = pThis->pTypeDescr;
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