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 //================================================================================================== 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 //================================================================================================== 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 { 326 327 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