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See the 18 * GNU Lesser General Public License version 3 for more details 19 * (a copy is included in the LICENSE file that accompanied this code). 20 * 21 * You should have received a copy of the GNU Lesser General Public License 22 * version 3 along with OpenOffice.org. If not, see 23 * <http://www.openoffice.org/license.html> 24 * for a copy of the LGPLv3 License. 25 * 26 ************************************************************************/ 27 28 // MARKER(update_precomp.py): autogen include statement, do not remove 29 #include "precompiled_bridges.hxx" 30 31 #include <sal/alloca.h> 32 #include <rtl/alloc.h> 33 34 #include <uno/data.h> 35 #include <bridges/cpp_uno/bridge.hxx> 36 #include <bridges/cpp_uno/type_misc.hxx> 37 38 #include "share.hxx" 39 40 41 using namespace ::rtl; 42 using namespace ::com::sun::star::uno; 43 44 namespace CPPU_CURRENT_NAMESPACE 45 { 46 47 void dummy_can_throw_anything( char const * ); 48 49 //================================================================================================== 50 // The call instruction within the asm section of callVirtualMethod may throw 51 // exceptions. So that the compiler handles this correctly, it is important 52 // that (a) callVirtualMethod might call dummy_can_throw_anything (although this 53 // never happens at runtime), which in turn can throw exceptions, and (b) 54 // callVirtualMethod is not inlined at its call site (so that any exceptions are 55 // caught which are thrown from the instruction calling callVirtualMethod): 56 void callVirtualMethod( 57 void * pThis, 58 sal_Int32 nVtableIndex, 59 void * pRegisterReturn, 60 typelib_TypeClass eReturnType, 61 sal_Int32 * pStackLongs, 62 sal_Int32 nStackLongs ) __attribute__((noinline)); 63 64 void callVirtualMethod( 65 void * pThis, 66 sal_Int32 nVtableIndex, 67 void * pRegisterReturn, 68 typelib_TypeClass eReturnType, 69 sal_Int32 * pStackLongs, 70 sal_Int32 nStackLongs ) 71 { 72 // parameter list is mixed list of * and values 73 // reference parameters are pointers 74 75 OSL_ENSURE( pStackLongs && pThis, "### null ptr!" ); 76 OSL_ENSURE( (sizeof(void *) == 4) && (sizeof(sal_Int32) == 4), "### unexpected size of int!" ); 77 OSL_ENSURE( nStackLongs && pStackLongs, "### no stack in callVirtualMethod !" ); 78 79 // never called 80 if (! pThis) dummy_can_throw_anything("xxx"); // address something 81 82 volatile long edx = 0, eax = 0; // for register returns 83 void * stackptr; 84 asm volatile ( 85 "mov %%esp, %6\n\t" 86 // copy values 87 "mov %0, %%eax\n\t" 88 "mov %%eax, %%edx\n\t" 89 "dec %%edx\n\t" 90 "shl $2, %%edx\n\t" 91 "add %1, %%edx\n" 92 "Lcopy:\n\t" 93 "pushl 0(%%edx)\n\t" 94 "sub $4, %%edx\n\t" 95 "dec %%eax\n\t" 96 "jne Lcopy\n\t" 97 // do the actual call 98 "mov %2, %%edx\n\t" 99 "mov 0(%%edx), %%edx\n\t" 100 "mov %3, %%eax\n\t" 101 "shl $2, %%eax\n\t" 102 "add %%eax, %%edx\n\t" 103 "mov 0(%%edx), %%edx\n\t" 104 "call *%%edx\n\t" 105 // save return registers 106 "mov %%eax, %4\n\t" 107 "mov %%edx, %5\n\t" 108 // cleanup stack 109 "mov %6, %%esp\n\t" 110 : 111 : "m"(nStackLongs), "m"(pStackLongs), "m"(pThis), "m"(nVtableIndex), 112 "m"(eax), "m"(edx), "m"(stackptr) 113 : "eax", "edx" ); 114 switch( eReturnType ) 115 { 116 case typelib_TypeClass_HYPER: 117 case typelib_TypeClass_UNSIGNED_HYPER: 118 ((long*)pRegisterReturn)[1] = edx; 119 case typelib_TypeClass_LONG: 120 case typelib_TypeClass_UNSIGNED_LONG: 121 case typelib_TypeClass_CHAR: 122 case typelib_TypeClass_ENUM: 123 ((long*)pRegisterReturn)[0] = eax; 124 break; 125 case typelib_TypeClass_SHORT: 126 case typelib_TypeClass_UNSIGNED_SHORT: 127 *(unsigned short*)pRegisterReturn = eax; 128 break; 129 case typelib_TypeClass_BOOLEAN: 130 case typelib_TypeClass_BYTE: 131 *(unsigned char*)pRegisterReturn = eax; 132 break; 133 case typelib_TypeClass_FLOAT: 134 asm ( "fstps %0" : : "m"(*(char *)pRegisterReturn) ); 135 break; 136 case typelib_TypeClass_DOUBLE: 137 asm ( "fstpl %0\n\t" : : "m"(*(char *)pRegisterReturn) ); 138 break; 139 } 140 } 141 142 //================================================================================================== 143 static void cpp_call( 144 cppu_unoInterfaceProxy * pThis, 145 sal_Int32 nVtableCall, 146 typelib_TypeDescriptionReference * pReturnTypeRef, 147 sal_Int32 nParams, typelib_MethodParameter * pParams, 148 void * pUnoReturn, void * pUnoArgs[], uno_Any ** ppUnoExc ) 149 { 150 // max space for: [complex ret ptr], values|ptr ... 151 char * pCppStack = 152 (char *)alloca( sizeof(sal_Int32) + ((nParams+2) * sizeof(sal_Int64)) ); 153 char * pCppStackStart = pCppStack; 154 155 // return 156 typelib_TypeDescription * pReturnTypeDescr = 0; 157 TYPELIB_DANGER_GET( &pReturnTypeDescr, pReturnTypeRef ); 158 OSL_ENSURE( pReturnTypeDescr, "### expected return type description!" ); 159 160 void * pCppReturn = 0; // if != 0 && != pUnoReturn, needs reconversion 161 162 if (pReturnTypeDescr) 163 { 164 if (cppu_isSimpleType( pReturnTypeDescr )) 165 { 166 pCppReturn = pUnoReturn; // direct way for simple types 167 } 168 else 169 { 170 // complex return via ptr 171 pCppReturn = *(void **)pCppStack = (cppu_relatesToInterface( pReturnTypeDescr ) 172 ? alloca( pReturnTypeDescr->nSize ) 173 : pUnoReturn); // direct way 174 pCppStack += sizeof(void *); 175 } 176 } 177 // push this 178 *(void**)pCppStack = pThis->pCppI; 179 pCppStack += sizeof( void* ); 180 181 // stack space 182 OSL_ENSURE( sizeof(void *) == sizeof(sal_Int32), "### unexpected size!" ); 183 // args 184 void ** pCppArgs = (void **)alloca( 3 * sizeof(void *) * nParams ); 185 // indizes of values this have to be converted (interface conversion cpp<=>uno) 186 sal_Int32 * pTempIndizes = (sal_Int32 *)(pCppArgs + nParams); 187 // type descriptions for reconversions 188 typelib_TypeDescription ** ppTempParamTypeDescr = (typelib_TypeDescription **)(pCppArgs + (2 * nParams)); 189 190 sal_Int32 nTempIndizes = 0; 191 192 for ( sal_Int32 nPos = 0; nPos < nParams; ++nPos ) 193 { 194 const typelib_MethodParameter & rParam = pParams[nPos]; 195 typelib_TypeDescription * pParamTypeDescr = 0; 196 TYPELIB_DANGER_GET( &pParamTypeDescr, rParam.pTypeRef ); 197 198 if (!rParam.bOut && cppu_isSimpleType( pParamTypeDescr )) 199 { 200 uno_copyAndConvertData( pCppArgs[nPos] = pCppStack, pUnoArgs[nPos], pParamTypeDescr, 201 &pThis->pBridge->aUno2Cpp ); 202 203 switch (pParamTypeDescr->eTypeClass) 204 { 205 case typelib_TypeClass_HYPER: 206 case typelib_TypeClass_UNSIGNED_HYPER: 207 case typelib_TypeClass_DOUBLE: 208 pCppStack += sizeof(sal_Int32); // extra long 209 } 210 // no longer needed 211 TYPELIB_DANGER_RELEASE( pParamTypeDescr ); 212 } 213 else // ptr to complex value | ref 214 { 215 if (! rParam.bIn) // is pure out 216 { 217 // cpp out is constructed mem, uno out is not! 218 uno_constructData( 219 *(void **)pCppStack = pCppArgs[nPos] = alloca( pParamTypeDescr->nSize ), 220 pParamTypeDescr ); 221 pTempIndizes[nTempIndizes] = nPos; // default constructed for cpp call 222 // will be released at reconversion 223 ppTempParamTypeDescr[nTempIndizes++] = pParamTypeDescr; 224 } 225 // is in/inout 226 else if (cppu_relatesToInterface( pParamTypeDescr )) 227 { 228 uno_copyAndConvertData( 229 *(void **)pCppStack = pCppArgs[nPos] = alloca( pParamTypeDescr->nSize ), 230 pUnoArgs[nPos], pParamTypeDescr, &pThis->pBridge->aUno2Cpp ); 231 232 pTempIndizes[nTempIndizes] = nPos; // has to be reconverted 233 // will be released at reconversion 234 ppTempParamTypeDescr[nTempIndizes++] = pParamTypeDescr; 235 } 236 else // direct way 237 { 238 *(void **)pCppStack = pCppArgs[nPos] = pUnoArgs[nPos]; 239 // no longer needed 240 TYPELIB_DANGER_RELEASE( pParamTypeDescr ); 241 } 242 } 243 pCppStack += sizeof(sal_Int32); // standard parameter length 244 } 245 246 try 247 { 248 OSL_ENSURE( !( (pCppStack - pCppStackStart ) & 3), "UNALIGNED STACK !!! (Please DO panic)" ); 249 callVirtualMethod( 250 pThis->pCppI, nVtableCall, 251 pCppReturn, pReturnTypeDescr->eTypeClass, 252 (sal_Int32 *)pCppStackStart, (pCppStack - pCppStackStart) / sizeof(sal_Int32) ); 253 // NO exception occured... 254 *ppUnoExc = 0; 255 256 // reconvert temporary params 257 for ( ; nTempIndizes--; ) 258 { 259 sal_Int32 nIndex = pTempIndizes[nTempIndizes]; 260 typelib_TypeDescription * pParamTypeDescr = ppTempParamTypeDescr[nTempIndizes]; 261 262 if (pParams[nIndex].bIn) 263 { 264 if (pParams[nIndex].bOut) // inout 265 { 266 uno_destructData( pUnoArgs[nIndex], pParamTypeDescr, 0 ); // destroy uno value 267 uno_copyAndConvertData( pUnoArgs[nIndex], pCppArgs[nIndex], pParamTypeDescr, 268 &pThis->pBridge->aCpp2Uno ); 269 } 270 } 271 else // pure out 272 { 273 uno_copyAndConvertData( pUnoArgs[nIndex], pCppArgs[nIndex], pParamTypeDescr, 274 &pThis->pBridge->aCpp2Uno ); 275 } 276 // destroy temp cpp param => cpp: every param was constructed 277 uno_destructData( pCppArgs[nIndex], pParamTypeDescr, cpp_release ); 278 279 TYPELIB_DANGER_RELEASE( pParamTypeDescr ); 280 } 281 // return value 282 if (pCppReturn && pUnoReturn != pCppReturn) 283 { 284 uno_copyAndConvertData( pUnoReturn, pCppReturn, pReturnTypeDescr, 285 &pThis->pBridge->aCpp2Uno ); 286 uno_destructData( pCppReturn, pReturnTypeDescr, cpp_release ); 287 } 288 } 289 catch (...) 290 { 291 // fill uno exception 292 fillUnoException( __cxa_get_globals()->caughtExceptions, *ppUnoExc, &pThis->pBridge->aCpp2Uno ); 293 294 // temporary params 295 for ( ; nTempIndizes--; ) 296 { 297 sal_Int32 nIndex = pTempIndizes[nTempIndizes]; 298 // destroy temp cpp param => cpp: every param was constructed 299 uno_destructData( pCppArgs[nIndex], ppTempParamTypeDescr[nTempIndizes], cpp_release ); 300 TYPELIB_DANGER_RELEASE( ppTempParamTypeDescr[nTempIndizes] ); 301 } 302 // return type 303 if (pReturnTypeDescr) 304 TYPELIB_DANGER_RELEASE( pReturnTypeDescr ); 305 } 306 } 307 308 309 //================================================================================================== 310 void SAL_CALL cppu_unoInterfaceProxy_dispatch( 311 uno_Interface * pUnoI, const typelib_TypeDescription * pMemberDescr, 312 void * pReturn, void * pArgs[], uno_Any ** ppException ) throw () 313 { 314 // is my surrogate 315 cppu_unoInterfaceProxy * pThis = (cppu_unoInterfaceProxy *)pUnoI; 316 typelib_InterfaceTypeDescription * pTypeDescr = pThis->pTypeDescr; 317 318 switch (pMemberDescr->eTypeClass) 319 { 320 case typelib_TypeClass_INTERFACE_ATTRIBUTE: 321 { 322 // determine vtable call index 323 sal_Int32 nMemberPos = ((typelib_InterfaceMemberTypeDescription *)pMemberDescr)->nPosition; 324 OSL_ENSURE( nMemberPos < pTypeDescr->nAllMembers, "### member pos out of range!" ); 325 326 sal_Int32 nVtableCall = pTypeDescr->pMapMemberIndexToFunctionIndex[nMemberPos]; 327 OSL_ENSURE( nVtableCall < pTypeDescr->nMapFunctionIndexToMemberIndex, "### illegal vtable index!" ); 328 329 if (pReturn) 330 { 331 // dependent dispatch 332 cpp_call( 333 pThis, nVtableCall, 334 ((typelib_InterfaceAttributeTypeDescription *)pMemberDescr)->pAttributeTypeRef, 335 0, 0, // no params 336 pReturn, pArgs, ppException ); 337 } 338 else 339 { 340 // is SET 341 typelib_MethodParameter aParam; 342 aParam.pTypeRef = 343 ((typelib_InterfaceAttributeTypeDescription *)pMemberDescr)->pAttributeTypeRef; 344 aParam.bIn = sal_True; 345 aParam.bOut = sal_False; 346 347 typelib_TypeDescriptionReference * pReturnTypeRef = 0; 348 OUString aVoidName( RTL_CONSTASCII_USTRINGPARAM("void") ); 349 typelib_typedescriptionreference_new( 350 &pReturnTypeRef, typelib_TypeClass_VOID, aVoidName.pData ); 351 352 // dependent dispatch 353 cpp_call( 354 pThis, nVtableCall +1, // get, then set method 355 pReturnTypeRef, 356 1, &aParam, 357 pReturn, pArgs, ppException ); 358 359 typelib_typedescriptionreference_release( pReturnTypeRef ); 360 } 361 362 break; 363 } 364 case typelib_TypeClass_INTERFACE_METHOD: 365 { 366 // determine vtable call index 367 sal_Int32 nMemberPos = ((typelib_InterfaceMemberTypeDescription *)pMemberDescr)->nPosition; 368 OSL_ENSURE( nMemberPos < pTypeDescr->nAllMembers, "### member pos out of range!" ); 369 370 sal_Int32 nVtableCall = pTypeDescr->pMapMemberIndexToFunctionIndex[nMemberPos]; 371 OSL_ENSURE( nVtableCall < pTypeDescr->nMapFunctionIndexToMemberIndex, "### illegal vtable index!" ); 372 373 switch (nVtableCall) 374 { 375 // standard calls 376 case 1: // acquire uno interface 377 (*pUnoI->acquire)( pUnoI ); 378 *ppException = 0; 379 break; 380 case 2: // release uno interface 381 (*pUnoI->release)( pUnoI ); 382 *ppException = 0; 383 break; 384 case 0: // queryInterface() opt 385 { 386 typelib_TypeDescription * pTD = 0; 387 TYPELIB_DANGER_GET( &pTD, reinterpret_cast< Type * >( pArgs[0] )->getTypeLibType() ); 388 if (pTD) 389 { 390 uno_Interface * pInterface = 0; 391 (*pThis->pBridge->pUnoEnv->getRegisteredInterface)( 392 pThis->pBridge->pUnoEnv, 393 (void **)&pInterface, pThis->oid.pData, (typelib_InterfaceTypeDescription *)pTD ); 394 395 if (pInterface) 396 { 397 ::uno_any_construct( 398 reinterpret_cast< uno_Any * >( pReturn ), 399 &pInterface, pTD, 0 ); 400 (*pInterface->release)( pInterface ); 401 TYPELIB_DANGER_RELEASE( pTD ); 402 *ppException = 0; 403 break; 404 } 405 TYPELIB_DANGER_RELEASE( pTD ); 406 } 407 } // else perform queryInterface() 408 default: 409 // dependent dispatch 410 cpp_call( 411 pThis, nVtableCall, 412 ((typelib_InterfaceMethodTypeDescription *)pMemberDescr)->pReturnTypeRef, 413 ((typelib_InterfaceMethodTypeDescription *)pMemberDescr)->nParams, 414 ((typelib_InterfaceMethodTypeDescription *)pMemberDescr)->pParams, 415 pReturn, pArgs, ppException ); 416 } 417 break; 418 } 419 default: 420 { 421 ::com::sun::star::uno::RuntimeException aExc( 422 OUString( RTL_CONSTASCII_USTRINGPARAM("illegal member type description!") ), 423 ::com::sun::star::uno::Reference< ::com::sun::star::uno::XInterface >() ); 424 425 Type const & rExcType = ::getCppuType( &aExc ); 426 // binary identical null reference 427 ::uno_type_any_construct( *ppException, &aExc, rExcType.getTypeLibType(), 0 ); 428 } 429 } 430 } 431 432 } 433 434