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 // 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 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 //================================================================================================== 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 occured... 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 //================================================================================================== 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