/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ /* * This file is part of the LibreOffice project. * * This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. * * This file incorporates work covered by the following license notice: * * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed * with this work for additional information regarding copyright * ownership. The ASF licenses this file to you under the Apache * License, Version 2.0 (the "License"); you may not use this file * except in compliance with the License. You may obtain a copy of * the License at http://www.apache.org/licenses/LICENSE-2.0 . */ #include #include #include #include #include #include #include #include #include #include "call.hxx" #include "share.hxx" using namespace ::com::sun::star::uno; namespace { void cpp2uno_call( bridges::cpp_uno::shared::CppInterfaceProxy * pThis, const typelib_TypeDescription * pMemberTypeDescr, typelib_TypeDescriptionReference * pReturnTypeRef, // 0 indicates void return sal_Int32 nParams, typelib_MethodParameter * pParams, void ** pCallStack, void * pReturnValue ) { // pCallStack: ret, [return ptr], this, params char * pCppStack = reinterpret_cast(pCallStack +1); // return typelib_TypeDescription * pReturnTypeDescr = nullptr; if (pReturnTypeRef) TYPELIB_DANGER_GET( &pReturnTypeDescr, pReturnTypeRef ); void * pUnoReturn = nullptr; void * pCppReturn = nullptr; // complex return ptr: if != 0 && != pUnoReturn, reconversion need if (pReturnTypeDescr) { if (x86::isSimpleReturnType( pReturnTypeDescr )) { pUnoReturn = pReturnValue; // direct way for simple types } else // complex return via ptr (pCppReturn) { pCppReturn = *reinterpret_cast(pCppStack); pCppStack += sizeof(void *); pUnoReturn = (bridges::cpp_uno::shared::relatesToInterfaceType( pReturnTypeDescr ) ? alloca( pReturnTypeDescr->nSize ) : pCppReturn); // direct way } } // pop this pCppStack += sizeof( void* ); // stack space static_assert(sizeof(void *) == sizeof(sal_Int32), "### unexpected size!"); // parameters void ** pUnoArgs = static_cast(alloca( 4 * sizeof(void *) * nParams )); void ** pCppArgs = pUnoArgs + nParams; // indices of values this have to be converted (interface conversion cpp<=>uno) sal_Int32 * pTempIndices = reinterpret_cast(pUnoArgs + (2 * nParams)); // type descriptions for reconversions typelib_TypeDescription ** ppTempParamTypeDescr = reinterpret_cast(pUnoArgs + (3 * nParams)); sal_Int32 nTempIndices = 0; for ( sal_Int32 nPos = 0; nPos < nParams; ++nPos ) { const typelib_MethodParameter & rParam = pParams[nPos]; typelib_TypeDescription * pParamTypeDescr = nullptr; TYPELIB_DANGER_GET( &pParamTypeDescr, rParam.pTypeRef ); if (!rParam.bOut && bridges::cpp_uno::shared::isSimpleType( pParamTypeDescr )) // value { pCppArgs[nPos] = pCppStack; pUnoArgs[nPos] = pCppStack; switch (pParamTypeDescr->eTypeClass) { case typelib_TypeClass_HYPER: case typelib_TypeClass_UNSIGNED_HYPER: case typelib_TypeClass_DOUBLE: pCppStack += sizeof(sal_Int32); // extra long break; default: break; } // no longer needed TYPELIB_DANGER_RELEASE( pParamTypeDescr ); } else // ptr to complex value | ref { pCppArgs[nPos] = *reinterpret_cast(pCppStack); if (! rParam.bIn) // is pure out { // uno out is unconstructed mem! pUnoArgs[nPos] = alloca( pParamTypeDescr->nSize ); pTempIndices[nTempIndices] = nPos; // will be released at reconversion ppTempParamTypeDescr[nTempIndices++] = pParamTypeDescr; } // is in/inout else if (bridges::cpp_uno::shared::relatesToInterfaceType( pParamTypeDescr )) { uno_copyAndConvertData( pUnoArgs[nPos] = alloca( pParamTypeDescr->nSize ), *reinterpret_cast(pCppStack), pParamTypeDescr, pThis->getBridge()->getCpp2Uno() ); pTempIndices[nTempIndices] = nPos; // has to be reconverted // will be released at reconversion ppTempParamTypeDescr[nTempIndices++] = pParamTypeDescr; } else // direct way { pUnoArgs[nPos] = *reinterpret_cast(pCppStack); // no longer needed TYPELIB_DANGER_RELEASE( pParamTypeDescr ); } } pCppStack += sizeof(sal_Int32); // standard parameter length } // ExceptionHolder uno_Any aUnoExc; // Any will be constructed by callee uno_Any * pUnoExc = &aUnoExc; // invoke uno dispatch call (*pThis->getUnoI()->pDispatcher)( pThis->getUnoI(), pMemberTypeDescr, pUnoReturn, pUnoArgs, &pUnoExc ); // in case an exception occurred... if (pUnoExc) { // destruct temporary in/inout params for ( ; nTempIndices--; ) { sal_Int32 nIndex = pTempIndices[nTempIndices]; if (pParams[nIndex].bIn) // is in/inout => was constructed uno_destructData( pUnoArgs[nIndex], ppTempParamTypeDescr[nTempIndices], nullptr ); TYPELIB_DANGER_RELEASE( ppTempParamTypeDescr[nTempIndices] ); } if (pReturnTypeDescr) TYPELIB_DANGER_RELEASE( pReturnTypeDescr ); CPPU_CURRENT_NAMESPACE::raiseException( &aUnoExc, pThis->getBridge()->getUno2Cpp() ); // has to destruct the any } else // else no exception occurred... { // temporary params for ( ; nTempIndices--; ) { sal_Int32 nIndex = pTempIndices[nTempIndices]; typelib_TypeDescription * pParamTypeDescr = ppTempParamTypeDescr[nTempIndices]; if (pParams[nIndex].bOut) // inout/out { // convert and assign uno_destructData( pCppArgs[nIndex], pParamTypeDescr, cpp_release ); uno_copyAndConvertData( pCppArgs[nIndex], pUnoArgs[nIndex], pParamTypeDescr, pThis->getBridge()->getUno2Cpp() ); } // destroy temp uno param uno_destructData( pUnoArgs[nIndex], pParamTypeDescr, nullptr ); TYPELIB_DANGER_RELEASE( pParamTypeDescr ); } // return if (pCppReturn) // has complex return { if (pUnoReturn != pCppReturn) // needs reconversion { uno_copyAndConvertData( pCppReturn, pUnoReturn, pReturnTypeDescr, pThis->getBridge()->getUno2Cpp() ); // destroy temp uno return uno_destructData( pUnoReturn, pReturnTypeDescr, nullptr ); } // complex return ptr is set to eax *static_cast< void ** >(pReturnValue) = pCppReturn; } if (pReturnTypeDescr) { TYPELIB_DANGER_RELEASE( pReturnTypeDescr ); } } } extern "C" void cpp_vtable_call( int nFunctionIndex, int nVtableOffset, void** pCallStack, void * pReturnValue ) { static_assert(sizeof(sal_Int32)==sizeof(void *), "### unexpected!"); // pCallStack: ret adr, [ret *], this, params void * pThis; if( nFunctionIndex & 0x80000000 ) { nFunctionIndex &= 0x7fffffff; pThis = pCallStack[2]; } else { pThis = pCallStack[1]; } pThis = static_cast< char * >(pThis) - nVtableOffset; bridges::cpp_uno::shared::CppInterfaceProxy * pCppI = bridges::cpp_uno::shared::CppInterfaceProxy::castInterfaceToProxy( pThis); typelib_InterfaceTypeDescription * pTypeDescr = pCppI->getTypeDescr(); if (nFunctionIndex >= pTypeDescr->nMapFunctionIndexToMemberIndex) { SAL_WARN( "bridges", "illegal " << OUString::unacquired(&pTypeDescr->aBase.pTypeName) << " vtable index " << nFunctionIndex << "/" << pTypeDescr->nMapFunctionIndexToMemberIndex); throw RuntimeException( ("illegal " + OUString::unacquired(&pTypeDescr->aBase.pTypeName) + " vtable index " + OUString::number(nFunctionIndex) + "/" + OUString::number(pTypeDescr->nMapFunctionIndexToMemberIndex)), static_cast(pThis)); } // determine called method sal_Int32 nMemberPos = pTypeDescr->pMapFunctionIndexToMemberIndex[nFunctionIndex]; assert(nMemberPos < pTypeDescr->nAllMembers); TypeDescription aMemberDescr( pTypeDescr->ppAllMembers[nMemberPos] ); switch (aMemberDescr.get()->eTypeClass) { case typelib_TypeClass_INTERFACE_ATTRIBUTE: { if (pTypeDescr->pMapMemberIndexToFunctionIndex[nMemberPos] == nFunctionIndex) { // is GET method cpp2uno_call( pCppI, aMemberDescr.get(), reinterpret_cast(aMemberDescr.get())->pAttributeTypeRef, 0, nullptr, // no params pCallStack, pReturnValue ); } else { // is SET method typelib_MethodParameter aParam; aParam.pTypeRef = reinterpret_cast(aMemberDescr.get())->pAttributeTypeRef; aParam.bIn = true; aParam.bOut = false; cpp2uno_call( pCppI, aMemberDescr.get(), nullptr, // indicates void return 1, &aParam, pCallStack, pReturnValue ); } break; } case typelib_TypeClass_INTERFACE_METHOD: { // is METHOD switch (nFunctionIndex) { case 1: // acquire() pCppI->acquireProxy(); // non virtual call! break; case 2: // release() pCppI->releaseProxy(); // non virtual call! break; case 0: // queryInterface() opt { typelib_TypeDescription * pTD = nullptr; TYPELIB_DANGER_GET( &pTD, static_cast< Type * >( pCallStack[3] )->getTypeLibType() ); if (pTD) { XInterface * pInterface = nullptr; (*pCppI->getBridge()->getCppEnv()->getRegisteredInterface)( pCppI->getBridge()->getCppEnv(), reinterpret_cast(&pInterface), pCppI->getOid().pData, reinterpret_cast(pTD) ); if (pInterface) { ::uno_any_construct( static_cast< uno_Any * >( pCallStack[1] ), &pInterface, pTD, cpp_acquire ); pInterface->release(); TYPELIB_DANGER_RELEASE( pTD ); *static_cast< void ** >(pReturnValue) = pCallStack[1]; break; } TYPELIB_DANGER_RELEASE( pTD ); } [[fallthrough]]; // else perform queryInterface() } default: cpp2uno_call( pCppI, aMemberDescr.get(), reinterpret_cast(aMemberDescr.get())->pReturnTypeRef, reinterpret_cast(aMemberDescr.get())->nParams, reinterpret_cast(aMemberDescr.get())->pParams, pCallStack, pReturnValue ); } break; } default: { throw RuntimeException( "no member description found!", static_cast(pThis) ); } } } extern "C" typedef void (*PrivateSnippetExecutor)(); int const codeSnippetSize = 16; #if defined (FREEBSD) || defined(NETBSD) || defined(OPENBSD) || defined(MACOSX) || \ defined(DRAGONFLY) namespace { PrivateSnippetExecutor returnsInRegister(typelib_TypeDescriptionReference * pReturnTypeRef) { //These archs apparently are returning small structs in registers, while Linux //doesn't PrivateSnippetExecutor exec=NULL; typelib_TypeDescription * pReturnTypeDescr = 0; TYPELIB_DANGER_GET( &pReturnTypeDescr, pReturnTypeRef ); const bool bSimpleReturnStruct = x86::isSimpleReturnType(pReturnTypeDescr); const sal_Int32 nRetSize = pReturnTypeDescr->nSize; TYPELIB_DANGER_RELEASE( pReturnTypeDescr ); if (bSimpleReturnStruct) { exec = privateSnippetExecutorGeneral; // fills eax if (nRetSize > 4) exec = privateSnippetExecutorHyper; // fills eax/edx } return exec; } } #endif unsigned char * codeSnippet( unsigned char * code, sal_PtrDiff writetoexecdiff, sal_Int32 functionIndex, sal_Int32 vtableOffset, typelib_TypeDescriptionReference * pReturnTypeRef) { PrivateSnippetExecutor exec; typelib_TypeClass eReturnClass = pReturnTypeRef ? pReturnTypeRef->eTypeClass : typelib_TypeClass_VOID; switch (eReturnClass) { case typelib_TypeClass_VOID: exec = privateSnippetExecutorVoid; break; case typelib_TypeClass_HYPER: case typelib_TypeClass_UNSIGNED_HYPER: exec = privateSnippetExecutorHyper; break; case typelib_TypeClass_FLOAT: exec = privateSnippetExecutorFloat; break; case typelib_TypeClass_DOUBLE: exec = privateSnippetExecutorDouble; break; case typelib_TypeClass_STRUCT: case typelib_TypeClass_EXCEPTION: #if defined(FREEBSD) || defined(NETBSD) || defined(OPENBSD) || defined(MACOSX) || \ defined(DRAGONFLY) exec = returnsInRegister(pReturnTypeRef); if (!exec) { exec = privateSnippetExecutorClass; functionIndex |= 0x80000000; } break; #endif case typelib_TypeClass_STRING: case typelib_TypeClass_TYPE: case typelib_TypeClass_ANY: case typelib_TypeClass_SEQUENCE: case typelib_TypeClass_INTERFACE: exec = privateSnippetExecutorClass; functionIndex |= 0x80000000; break; default: exec = privateSnippetExecutorGeneral; break; } unsigned char * p = code; assert(sizeof (sal_Int32) == 4); // mov function_index, %eax: *p++ = 0xB8; *reinterpret_cast< sal_Int32 * >(p) = functionIndex; p += sizeof (sal_Int32); // mov vtable_offset, %edx: *p++ = 0xBA; *reinterpret_cast< sal_Int32 * >(p) = vtableOffset; p += sizeof (sal_Int32); // jmp privateSnippetExecutor: *p++ = 0xE9; *reinterpret_cast< sal_Int32 * >(p) = reinterpret_cast(exec) - p - sizeof (sal_Int32) - writetoexecdiff; p += sizeof (sal_Int32); assert(p - code <= codeSnippetSize); return code + codeSnippetSize; } } struct bridges::cpp_uno::shared::VtableFactory::Slot { void * fn; }; bridges::cpp_uno::shared::VtableFactory::Slot * bridges::cpp_uno::shared::VtableFactory::mapBlockToVtable(void * block) { return static_cast< Slot * >(block) + 2; } std::size_t bridges::cpp_uno::shared::VtableFactory::getBlockSize( sal_Int32 slotCount) { return (slotCount + 2) * sizeof (Slot) + slotCount * codeSnippetSize; } bridges::cpp_uno::shared::VtableFactory::Slot * bridges::cpp_uno::shared::VtableFactory::initializeBlock( void * block, sal_Int32 slotCount, sal_Int32, typelib_InterfaceTypeDescription *) { Slot * slots = mapBlockToVtable(block); slots[-2].fn = nullptr; slots[-1].fn = nullptr; return slots + slotCount; } unsigned char * bridges::cpp_uno::shared::VtableFactory::addLocalFunctions( Slot ** slots, unsigned char * code, sal_PtrDiff writetoexecdiff, typelib_InterfaceTypeDescription const * type, sal_Int32 functionOffset, sal_Int32 functionCount, sal_Int32 vtableOffset) { (*slots) -= functionCount; Slot * s = *slots; for (sal_Int32 i = 0; i < type->nMembers; ++i) { typelib_TypeDescription * member = nullptr; TYPELIB_DANGER_GET(&member, type->ppMembers[i]); assert(member != nullptr); switch (member->eTypeClass) { case typelib_TypeClass_INTERFACE_ATTRIBUTE: // Getter: (s++)->fn = code + writetoexecdiff; code = codeSnippet( code, writetoexecdiff, functionOffset++, vtableOffset, reinterpret_cast< typelib_InterfaceAttributeTypeDescription * >( member)->pAttributeTypeRef); // Setter: if (!reinterpret_cast< typelib_InterfaceAttributeTypeDescription * >( member)->bReadOnly) { (s++)->fn = code + writetoexecdiff; code = codeSnippet( code, writetoexecdiff, functionOffset++, vtableOffset, nullptr); } break; case typelib_TypeClass_INTERFACE_METHOD: (s++)->fn = code + writetoexecdiff; code = codeSnippet( code, writetoexecdiff, functionOffset++, vtableOffset, reinterpret_cast< typelib_InterfaceMethodTypeDescription * >( member)->pReturnTypeRef); break; default: assert(false); break; } TYPELIB_DANGER_RELEASE(member); } return code; } void bridges::cpp_uno::shared::VtableFactory::flushCode( unsigned char const *, unsigned char const *) {} /* vim:set shiftwidth=4 softtabstop=4 expandtab: */