ef53355355
<https://gerrit.libreoffice.org/c/core/+/144139> "New loplugin:unocast" had argued that uses of dynamic_cast from a UNO interface type are broken in general (because if the source object is a proxy from the C*+ UNO bridge, its vtable's RTTI slot will normally not be set up, which can cause a crash), and should be replaced with uses of XUnoTunnel. Which the various recent "loplugin:unocast (...)" commits started to do. However, it became clear that that is not the most ideal way forward: For one, getting more and more implementations of XUnoTunnel::getSomething into existing class hierarchies is error prone, as each such implementation must manually delegate to all its base class implementations. For another, uses of comphelper::getFromUnoTunnel (which often needs to do a queryInterface to XUnoTunnel first) are easily more expensive than uses of dynamic_cast. Thanks to Noel, the insight here is that for the use case of a dynamic_cast from a UNO interface type to a local C++ class type, and if the source object is a proxy, it is sufficient that the dynamic_cast will not crash. It will necessarily always return null (as the proxy will never be the implementation of a local C++ class type), so it is sufficient to fill the RTTI slots of the proxies' vtables with dummy values. That avoids having to set up proper RTTI for those potentially multiple-inheritance proxy types. (And with this in place, all those recent "loplugin:unocast (...)" commits can be reverted again in a next step.) I verified the changes for the gcc3_linux_aarch64 (on macOS), gcc3_linux_intel, gcc3_linux_x86-64, gcc3_macosx_x86-64, msvc_win32_intel, and msvc_win32_x86-64 bridges. The changes for all the other bridges were done blindly. (For gcc3_linux_x86-64, which already conditionally supported proper RTTI for UBSan, setting the offset-to-top slot to non-zero had to be made conditional too, as the dummy ProxyRtti will always pretend to be a full class rather than a potential base class that could have a non-zero offset-to-top value. For msvc_win32_*, it turned out that the existing code to set up dummy XInterface RTTI (which was there for reasons lost to history) was broken.) Change-Id: Iec4b8067d26b14b6fb02c2fdd15e1eee20919590 Reviewed-on: https://gerrit.libreoffice.org/c/core/+/145038 Tested-by: Jenkins Reviewed-by: Stephan Bergmann <sbergman@redhat.com>
720 lines
26 KiB
C++
720 lines
26 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#include <malloc.h>
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#include <typeinfo>
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#include <rtl/alloc.h>
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#include <com/sun/star/uno/genfunc.hxx>
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#include "com/sun/star/uno/RuntimeException.hpp"
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#include <sal/log.hxx>
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#include <uno/data.h>
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#include <typelib/typedescription.hxx>
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#include "bridge.hxx"
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#include "cppinterfaceproxy.hxx"
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#include "types.hxx"
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#include "vtablefactory.hxx"
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#include "share.hxx"
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#include <dlfcn.h>
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using namespace ::osl;
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using namespace ::com::sun::star::uno;
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namespace
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{
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static typelib_TypeClass cpp2uno_call(
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bridges::cpp_uno::shared::CppInterfaceProxy* pThis,
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const typelib_TypeDescription * pMemberTypeDescr,
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typelib_TypeDescriptionReference * pReturnTypeRef,
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sal_Int32 nParams, typelib_MethodParameter * pParams,
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long r8, void ** gpreg, double *fpreg, void ** ovrflw,
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sal_Int64 * pRegisterReturn /* space for register return */ )
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{
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void ** startovrflw = ovrflw;
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int nregs = 0; //number of words passed in registers
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#if OSL_DEBUG_LEVEL > 2
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fprintf(stderr, "cpp2uno_call\n");
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#endif
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// return
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typelib_TypeDescription * pReturnTypeDescr = 0;
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if (pReturnTypeRef)
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TYPELIB_DANGER_GET( &pReturnTypeDescr, pReturnTypeRef );
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void * pUnoReturn = 0;
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// complex return ptr: if != 0 && != pUnoReturn, reconversion need
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void * pCppReturn = 0;
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if (pReturnTypeDescr)
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{
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if (hppa::isRegisterReturn(pReturnTypeRef))
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{
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#if OSL_DEBUG_LEVEL > 2
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fprintf(stderr, "simple return\n");
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#endif
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pUnoReturn = pRegisterReturn; // direct way for simple types
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}
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else
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{
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#if OSL_DEBUG_LEVEL > 2
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fprintf(stderr, "complex return via r8\n");
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#endif
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pCppReturn = (void *)r8;
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pUnoReturn = (bridges::cpp_uno::shared::relatesToInterfaceType( pReturnTypeDescr )
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? alloca( pReturnTypeDescr->nSize )
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: pCppReturn); // direct way
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}
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}
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// pop this
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gpreg++;
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fpreg++;
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nregs++;
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// stack space
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static_assert(sizeof(void *) == sizeof(sal_Int32), "### unexpected size!");
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// parameters
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void ** pUnoArgs = (void **)alloca( 4 * sizeof(void *) * nParams );
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void ** pCppArgs = pUnoArgs + nParams;
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// indices of values this have to be converted (interface conversion
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// cpp<=>uno)
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sal_Int32 * pTempIndices = (sal_Int32 *)(pUnoArgs + (2 * nParams));
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// type descriptions for reconversions
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typelib_TypeDescription ** ppTempParamTypeDescr =
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(typelib_TypeDescription **)(pUnoArgs + (3 * nParams));
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sal_Int32 nTempIndices = 0;
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bool bOverflowUsed = false;
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for ( sal_Int32 nPos = 0; nPos < nParams; ++nPos )
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{
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const typelib_MethodParameter & rParam = pParams[nPos];
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typelib_TypeDescription * pParamTypeDescr = 0;
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TYPELIB_DANGER_GET( &pParamTypeDescr, rParam.pTypeRef );
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if (!rParam.bOut && bridges::cpp_uno::shared::isSimpleType( pParamTypeDescr ))
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{
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switch (pParamTypeDescr->eTypeClass)
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{
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case typelib_TypeClass_DOUBLE:
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if (nregs < hppa::MAX_WORDS_IN_REGS && (nregs & 1))
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{
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gpreg++;
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fpreg++;
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nregs++;
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}
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if (nregs < hppa::MAX_WORDS_IN_REGS-1)
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{
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fpreg++;
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pCppArgs[nPos] = pUnoArgs[nPos] = fpreg;
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gpreg+=2;
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fpreg+=2;
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nregs+=2;
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}
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else
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{
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if ((startovrflw-ovrflw) & 1)
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ovrflw--;
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pCppArgs[nPos] = pUnoArgs[nPos] = ((char*)ovrflw - 4);
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bOverflowUsed = true;
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}
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if (bOverflowUsed) ovrflw-=2;
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break;
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case typelib_TypeClass_FLOAT:
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if (nregs < hppa::MAX_WORDS_IN_REGS)
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{
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pCppArgs[nPos] = pUnoArgs[nPos] = fpreg;
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gpreg++;
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fpreg++;
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nregs++;
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}
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else
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{
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pCppArgs[nPos] = pUnoArgs[nPos] = ovrflw;
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bOverflowUsed = true;
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}
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if (bOverflowUsed) ovrflw--;
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break;
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case typelib_TypeClass_HYPER:
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case typelib_TypeClass_UNSIGNED_HYPER:
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if (nregs < hppa::MAX_WORDS_IN_REGS && (nregs & 1))
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{
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gpreg++;
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fpreg++;
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nregs++;
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}
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if (nregs < hppa::MAX_WORDS_IN_REGS-1)
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{
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pCppArgs[nPos] = pUnoArgs[nPos] = gpreg;
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gpreg+=2;
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fpreg+=2;
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nregs+=2;
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}
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else
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{
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if ((startovrflw-ovrflw) & 1)
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ovrflw--;
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pCppArgs[nPos] = pUnoArgs[nPos] = ((char*)ovrflw - 4);
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bOverflowUsed = true;
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}
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if (bOverflowUsed) ovrflw-=2;
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break;
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case typelib_TypeClass_BYTE:
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case typelib_TypeClass_BOOLEAN:
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if (nregs < hppa::MAX_WORDS_IN_REGS)
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{
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pCppArgs[nPos] = pUnoArgs[nPos] = ((char*)gpreg + 3);
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gpreg++;
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fpreg++;
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nregs++;
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}
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else
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{
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pCppArgs[nPos] = pUnoArgs[nPos] = ((char*)ovrflw+3);
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bOverflowUsed = true;
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}
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if (bOverflowUsed) ovrflw--;
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break;
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case typelib_TypeClass_CHAR:
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case typelib_TypeClass_SHORT:
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case typelib_TypeClass_UNSIGNED_SHORT:
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if (nregs < hppa::MAX_WORDS_IN_REGS)
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{
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pCppArgs[nPos] = pUnoArgs[nPos] = ((char*)gpreg+2);
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gpreg++;
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fpreg++;
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nregs++;
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}
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else
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{
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pCppArgs[nPos] = pUnoArgs[nPos] = ((char*)ovrflw+2);
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bOverflowUsed = true;
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}
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if (bOverflowUsed) ovrflw--;
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break;
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case typelib_TypeClass_ENUM:
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case typelib_TypeClass_LONG:
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case typelib_TypeClass_UNSIGNED_LONG:
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default:
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if (nregs < hppa::MAX_WORDS_IN_REGS)
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{
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pCppArgs[nPos] = pUnoArgs[nPos] = gpreg;
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gpreg++;
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fpreg++;
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nregs++;
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}
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else
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{
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pCppArgs[nPos] = pUnoArgs[nPos] = ovrflw;
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bOverflowUsed = true;
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}
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if (bOverflowUsed) ovrflw--;
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break;
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}
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// no longer needed
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TYPELIB_DANGER_RELEASE( pParamTypeDescr );
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}
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else // ptr to complex value | ref
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{
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void *pCppStack;
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if (nregs < hppa::MAX_WORDS_IN_REGS)
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{
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pCppArgs[nPos] = pCppStack = *gpreg;
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gpreg++;
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fpreg++;
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nregs++;
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}
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else
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{
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pCppArgs[nPos] = pCppStack = *ovrflw;
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bOverflowUsed = true;
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}
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if (bOverflowUsed) ovrflw--;
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if (! rParam.bIn) // is pure out
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{
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// uno out is unconstructed mem!
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pUnoArgs[nPos] = alloca( pParamTypeDescr->nSize );
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pTempIndices[nTempIndices] = nPos;
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// will be released at reconversion
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ppTempParamTypeDescr[nTempIndices++] = pParamTypeDescr;
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}
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// is in/inout
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else if (bridges::cpp_uno::shared::relatesToInterfaceType(
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pParamTypeDescr ))
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{
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uno_copyAndConvertData( pUnoArgs[nPos] = alloca( pParamTypeDescr->nSize ),
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pCppStack, pParamTypeDescr,
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pThis->getBridge()->getCpp2Uno() );
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pTempIndices[nTempIndices] = nPos; // has to be reconverted
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// will be released at reconversion
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ppTempParamTypeDescr[nTempIndices++] = pParamTypeDescr;
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}
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else // direct way
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{
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pUnoArgs[nPos] = pCppStack;
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// no longer needed
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TYPELIB_DANGER_RELEASE( pParamTypeDescr );
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}
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}
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}
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// ExceptionHolder
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uno_Any aUnoExc; // Any will be constructed by callee
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uno_Any * pUnoExc = &aUnoExc;
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#if OSL_DEBUG_LEVEL > 2
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fprintf(stderr, "before dispatch\n");
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#endif
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// invoke uno dispatch call
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(*pThis->getUnoI()->pDispatcher)(
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pThis->getUnoI(), pMemberTypeDescr, pUnoReturn, pUnoArgs, &pUnoExc );
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#if OSL_DEBUG_LEVEL > 2
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fprintf(stderr, "after dispatch\n");
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#endif
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// in case an exception occurred...
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if (pUnoExc)
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{
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// destruct temporary in/inout params
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for ( ; nTempIndices--; )
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{
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sal_Int32 nIndex = pTempIndices[nTempIndices];
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if (pParams[nIndex].bIn) // is in/inout => was constructed
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uno_destructData( pUnoArgs[nIndex],
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ppTempParamTypeDescr[nTempIndices], 0 );
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TYPELIB_DANGER_RELEASE( ppTempParamTypeDescr[nTempIndices] );
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}
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if (pReturnTypeDescr)
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TYPELIB_DANGER_RELEASE( pReturnTypeDescr );
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CPPU_CURRENT_NAMESPACE::raiseException( &aUnoExc,
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pThis->getBridge()->getUno2Cpp() ); // has to destruct the any
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// is here for dummy
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return typelib_TypeClass_VOID;
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}
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else // else no exception occurred...
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{
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// temporary params
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for ( ; nTempIndices--; )
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{
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sal_Int32 nIndex = pTempIndices[nTempIndices];
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typelib_TypeDescription * pParamTypeDescr =
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ppTempParamTypeDescr[nTempIndices];
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if (pParams[nIndex].bOut) // inout/out
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{
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// convert and assign
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uno_destructData( pCppArgs[nIndex], pParamTypeDescr,
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cpp_release );
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uno_copyAndConvertData( pCppArgs[nIndex], pUnoArgs[nIndex],
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pParamTypeDescr, pThis->getBridge()->getUno2Cpp() );
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}
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// destroy temp uno param
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uno_destructData( pUnoArgs[nIndex], pParamTypeDescr, 0 );
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TYPELIB_DANGER_RELEASE( pParamTypeDescr );
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}
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// return
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if (pCppReturn) // has complex return
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{
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if (pUnoReturn != pCppReturn) // needs reconversion
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{
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uno_copyAndConvertData( pCppReturn, pUnoReturn,
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pReturnTypeDescr, pThis->getBridge()->getUno2Cpp() );
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// destroy temp uno return
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uno_destructData( pUnoReturn, pReturnTypeDescr, 0 );
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}
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// complex return ptr is set to eax
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*(void **)pRegisterReturn = pCppReturn;
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}
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if (pReturnTypeDescr)
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{
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typelib_TypeClass eRet =
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(typelib_TypeClass)pReturnTypeDescr->eTypeClass;
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TYPELIB_DANGER_RELEASE( pReturnTypeDescr );
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return eRet;
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}
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else
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return typelib_TypeClass_VOID;
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}
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}
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static typelib_TypeClass cpp_mediate(
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sal_Int32 nFunctionIndex, sal_Int32 nVtableOffset,
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void ** gpreg, double* fpreg,
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long sp, long r8,
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sal_Int64 * pRegisterReturn /* space for register return */ )
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{
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void ** ovrflw = (void**)(sp);
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#if OSL_DEBUG_LEVEL > 2
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fprintf(stderr, "cpp_mediate with\n");
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fprintf(stderr, "%x %x\n", nFunctionIndex, nVtableOffset);
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fprintf(stderr, "and %x %x\n", (long)(ovrflw[0]), (long)(ovrflw[-1]));
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fprintf(stderr, "and %x %x\n", (long)(ovrflw[-2]), (long)(ovrflw[-3]));
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fprintf(stderr, "and %x %x\n", (long)(ovrflw[-4]), (long)(ovrflw[-5]));
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fprintf(stderr, "and %x %x\n", (long)(ovrflw[-6]), (long)(ovrflw[-7]));
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fprintf(stderr, "and %x %x\n", (long)(ovrflw[-8]), (long)(ovrflw[-9]));
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fprintf(stderr, "and %x %x\n", (long)(ovrflw[-10]), (long)(ovrflw[-11]));
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fprintf(stderr, "and %x %x\n", (long)(ovrflw[-12]), (long)(ovrflw[-13]));
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fprintf(stderr, "and %x %x\n", (long)(ovrflw[-14]), (long)(ovrflw[-15]));
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#endif
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static_assert(sizeof(sal_Int32)==sizeof(void *), "### unexpected!");
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// gpreg: [ret *], this, [other gpr params]
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// fpreg: [fpr params]
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// ovrflw: [gpr or fpr params (properly aligned)]
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void * pThis;
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if (nFunctionIndex & 0x80000000 )
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{
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nFunctionIndex &= 0x7fffffff;
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pThis = gpreg[1];
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#if OSL_DEBUG_LEVEL > 2
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fprintf(stderr, "pThis is gpreg[1]\n");
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#endif
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}
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else
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{
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pThis = gpreg[0];
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#if OSL_DEBUG_LEVEL > 2
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fprintf(stderr, "pThis is gpreg[0]\n");
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#endif
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}
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pThis = static_cast< char * >(pThis) - nVtableOffset;
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bridges::cpp_uno::shared::CppInterfaceProxy * pCppI =
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bridges::cpp_uno::shared::CppInterfaceProxy::castInterfaceToProxy(
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pThis);
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typelib_InterfaceTypeDescription * pTypeDescr = pCppI->getTypeDescr();
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if (nFunctionIndex >= pTypeDescr->nMapFunctionIndexToMemberIndex)
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{
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SAL_WARN(
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"bridges",
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"illegal " << OUString::unacquired(&pTypeDescr->aBase.pTypeName)
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<< " vtable index " << nFunctionIndex << "/"
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<< pTypeDescr->nMapFunctionIndexToMemberIndex);
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throw RuntimeException(
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("illegal " + OUString::unacquired(&pTypeDescr->aBase.pTypeName)
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+ " vtable index " + OUString::number(nFunctionIndex) + "/"
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+ OUString::number(pTypeDescr->nMapFunctionIndexToMemberIndex)),
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(XInterface *)pCppI);
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}
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// determine called method
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assert(nFunctionIndex < pTypeDescr->nMapFunctionIndexToMemberIndex);
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sal_Int32 nMemberPos =
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pTypeDescr->pMapFunctionIndexToMemberIndex[nFunctionIndex];
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assert(nMemberPos < pTypeDescr->nAllMembers);
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TypeDescription aMemberDescr( pTypeDescr->ppAllMembers[nMemberPos] );
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typelib_TypeClass eRet;
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switch (aMemberDescr.get()->eTypeClass)
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{
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case typelib_TypeClass_INTERFACE_ATTRIBUTE:
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{
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if (pTypeDescr->pMapMemberIndexToFunctionIndex[nMemberPos] ==
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nFunctionIndex)
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{
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// is GET method
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|
eRet = cpp2uno_call(
|
|
pCppI, aMemberDescr.get(),
|
|
((typelib_InterfaceAttributeTypeDescription *)aMemberDescr.get())->pAttributeTypeRef,
|
|
0, 0, // no params
|
|
r8, gpreg, fpreg, ovrflw, pRegisterReturn );
|
|
}
|
|
else
|
|
{
|
|
// is SET method
|
|
typelib_MethodParameter aParam;
|
|
aParam.pTypeRef =
|
|
((typelib_InterfaceAttributeTypeDescription *)aMemberDescr.get())->pAttributeTypeRef;
|
|
aParam.bIn = sal_True;
|
|
aParam.bOut = sal_False;
|
|
|
|
eRet = cpp2uno_call(
|
|
pCppI, aMemberDescr.get(),
|
|
0, // indicates void return
|
|
1, &aParam,
|
|
r8, gpreg, fpreg, ovrflw, pRegisterReturn );
|
|
}
|
|
break;
|
|
}
|
|
case typelib_TypeClass_INTERFACE_METHOD:
|
|
{
|
|
// is METHOD
|
|
switch (nFunctionIndex)
|
|
{
|
|
case 1: // acquire()
|
|
pCppI->acquireProxy(); // non virtual call!
|
|
eRet = typelib_TypeClass_VOID;
|
|
break;
|
|
case 2: // release()
|
|
pCppI->releaseProxy(); // non virtual call!
|
|
eRet = typelib_TypeClass_VOID;
|
|
break;
|
|
case 0: // queryInterface() opt
|
|
{
|
|
typelib_TypeDescription * pTD = 0;
|
|
TYPELIB_DANGER_GET(&pTD,
|
|
reinterpret_cast<Type *>(gpreg[1])->getTypeLibType());
|
|
if (pTD)
|
|
{
|
|
XInterface * pInterface = 0;
|
|
(*pCppI->getBridge()->getCppEnv()->getRegisteredInterface)(
|
|
pCppI->getBridge()->getCppEnv(),
|
|
(void **)&pInterface, pCppI->getOid().pData,
|
|
(typelib_InterfaceTypeDescription *)pTD );
|
|
|
|
if (pInterface)
|
|
{
|
|
::uno_any_construct(
|
|
reinterpret_cast< uno_Any * >( r8 ),
|
|
&pInterface, pTD, cpp_acquire );
|
|
pInterface->release();
|
|
TYPELIB_DANGER_RELEASE( pTD );
|
|
*(void **)pRegisterReturn = (void*)r8;
|
|
eRet = typelib_TypeClass_ANY;
|
|
break;
|
|
}
|
|
TYPELIB_DANGER_RELEASE( pTD );
|
|
}
|
|
} // else perform queryInterface()
|
|
default:
|
|
eRet = cpp2uno_call(
|
|
pCppI, aMemberDescr.get(),
|
|
((typelib_InterfaceMethodTypeDescription *)aMemberDescr.get())->pReturnTypeRef,
|
|
((typelib_InterfaceMethodTypeDescription *)aMemberDescr.get())->nParams,
|
|
((typelib_InterfaceMethodTypeDescription *)aMemberDescr.get())->pParams,
|
|
r8, gpreg, fpreg, ovrflw, pRegisterReturn );
|
|
}
|
|
break;
|
|
}
|
|
default:
|
|
{
|
|
throw RuntimeException( "no member description found!", (XInterface *)pCppI );
|
|
}
|
|
}
|
|
|
|
return eRet;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* is called on incoming vtable calls
|
|
* (called by asm snippets)
|
|
*/
|
|
|
|
sal_Int64 cpp_vtable_call( sal_uInt32 in0, sal_uInt32 in1, sal_uInt32 in2, sal_uInt32 in3, sal_uInt32 firstonstack )
|
|
{
|
|
register sal_Int32 r21 asm("r21");
|
|
register sal_Int32 r22 asm("r22");
|
|
register sal_Int32 r28 asm("r28");
|
|
sal_Int32 functionIndex = r21;
|
|
sal_Int32 vtableOffset = r22;
|
|
sal_Int32 r8 = r28;
|
|
|
|
long sp = (long)&firstonstack;
|
|
|
|
sal_uInt32 gpreg[hppa::MAX_GPR_REGS];
|
|
gpreg[0] = in0;
|
|
gpreg[1] = in1;
|
|
gpreg[2] = in2;
|
|
gpreg[3] = in3;
|
|
|
|
float fpreg[hppa::MAX_SSE_REGS]; //todo
|
|
register float f0 asm("fr4"); fpreg[0] = f0;
|
|
register float f1 asm("fr5"); fpreg[1] = f1;
|
|
register float f2 asm("fr6"); fpreg[2] = f2;
|
|
register float f3 asm("fr7"); fpreg[3] = f3;
|
|
|
|
double dpreg[hppa::MAX_SSE_REGS]; //todo
|
|
register double d0 asm("fr4"); dpreg[0] = d0;
|
|
register double d1 asm("fr5"); dpreg[1] = d1;
|
|
register double d2 asm("fr6"); dpreg[2] = d2;
|
|
register double d3 asm("fr7"); dpreg[3] = d3;
|
|
|
|
|
|
#if OSL_DEBUG_LEVEL > 2
|
|
fprintf(stderr, "got to cpp_vtable_call with %x %x\n", functionIndex, vtableOffset);
|
|
for (int i = 0; i < hppa::MAX_GPR_REGS; ++i)
|
|
fprintf(stderr, "reg %d is %d %x\n", i, gpreg[i], gpreg[i]);
|
|
for (int i = 0; i < hppa::MAX_SSE_REGS; ++i)
|
|
fprintf(stderr, "float reg %d is %f %x\n", i, fpreg[i], ((long*)fpreg)[i]);
|
|
for (int i = 0; i < 4; ++i)
|
|
fprintf(stderr, "double reg %d is %f %llx\n", i, dpreg[i], ((long long*)dpreg)[i]);
|
|
#endif
|
|
|
|
sal_Int64 nRegReturn;
|
|
|
|
typelib_TypeClass aType =
|
|
cpp_mediate( functionIndex, vtableOffset, (void**)gpreg, dpreg, sp, r8, &nRegReturn);
|
|
|
|
switch( aType )
|
|
{
|
|
case typelib_TypeClass_FLOAT:
|
|
f0 = (*((float*)&nRegReturn));
|
|
break;
|
|
case typelib_TypeClass_DOUBLE:
|
|
d0 = (*((double*)&nRegReturn));
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return nRegReturn;
|
|
}
|
|
|
|
|
|
namespace
|
|
{
|
|
const int codeSnippetSize = 44;
|
|
|
|
# define unldil(v) (((v & 0x7c) << 14) | ((v & 0x180) << 7) | ((v & 0x3) << 12) | ((v & 0xffe00) >> 8) | ((v & 0x100000) >> 20))
|
|
# define L21(v) unldil(((unsigned long)(v) >> 11) & 0x1fffff) //Left 21 bits
|
|
# define R11(v) (((unsigned long)(v) & 0x7FF) << 1) //Right 11 bits
|
|
|
|
unsigned char *codeSnippet(unsigned char* code, sal_Int32 functionIndex,
|
|
sal_Int32 vtableOffset, bool bHasHiddenParam)
|
|
{
|
|
if (bHasHiddenParam)
|
|
functionIndex |= 0x80000000;
|
|
|
|
unsigned char * p = code;
|
|
*(unsigned long*)&p[0] = 0xeaa00000; // b,l 0x8,r21
|
|
*(unsigned long*)&p[4] = 0xd6a01c1e; // depwi 0,31,2,r21
|
|
*(unsigned long*)&p[8] = 0x4aa10040; // ldw 32(r21),r1
|
|
|
|
*(unsigned long*)&p[12] = 0x22A00000 | L21(functionIndex); // ldil L<functionIndex>,r21
|
|
*(unsigned long*)&p[16] = 0x36B50000 | R11(functionIndex); // ldo R<functionIndex>,r21
|
|
|
|
*(unsigned long*)&p[20] = 0x22C00000 | L21(vtableOffset); // ldil L<vtableOffset>,r22
|
|
*(unsigned long*)&p[24] = 0x36D60000 | R11(vtableOffset); // ldo R<vtableOffset>,r22
|
|
|
|
*(unsigned long*)&p[28] = 0x0c201094; // ldw 0(r1),r20
|
|
*(unsigned long*)&p[32] = 0xea80c000; // bv r0(r20)
|
|
*(unsigned long*)&p[36] = 0x0c281093; // ldw 4(r1),r19
|
|
*(unsigned long*)&p[40] = ((unsigned long)(cpp_vtable_call) & ~2);
|
|
|
|
return code + codeSnippetSize;
|
|
}
|
|
}
|
|
|
|
struct bridges::cpp_uno::shared::VtableFactory::Slot { void const * 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;
|
|
}
|
|
|
|
namespace {
|
|
// Some dummy type whose RTTI is used in the synthesized proxy vtables to make uses of dynamic_cast
|
|
// on such proxy objects not crash:
|
|
struct ProxyRtti {};
|
|
}
|
|
|
|
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 = 0;
|
|
slots[-1].fn = &typeid(ProxyRtti);
|
|
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 = 0;
|
|
TYPELIB_DANGER_GET(&member, type->ppMembers[i]);
|
|
assert(member != 0);
|
|
switch (member->eTypeClass)
|
|
{
|
|
case typelib_TypeClass_INTERFACE_ATTRIBUTE:
|
|
// Getter:
|
|
(s++)->fn = code + writetoexecdiff;
|
|
code = codeSnippet(code, functionOffset++, vtableOffset, false);
|
|
// Setter:
|
|
if (!reinterpret_cast<
|
|
typelib_InterfaceAttributeTypeDescription * >(
|
|
member)->bReadOnly)
|
|
{
|
|
(s++)->fn = code + writetoexecdiff;
|
|
code = codeSnippet(code, functionOffset++, vtableOffset, false);
|
|
}
|
|
break;
|
|
case typelib_TypeClass_INTERFACE_METHOD:
|
|
{
|
|
(s++)->fn = code + writetoexecdiff;
|
|
code = codeSnippet(code, functionOffset++, vtableOffset, false);
|
|
break;
|
|
}
|
|
default:
|
|
assert(false);
|
|
break;
|
|
}
|
|
TYPELIB_DANGER_RELEASE(member);
|
|
}
|
|
return code;
|
|
}
|
|
|
|
void bridges::cpp_uno::shared::VtableFactory::flushCode(
|
|
unsigned char const *beg, unsigned char const *end)
|
|
{
|
|
void *p = (void*)((size_t)beg & ~31);
|
|
size_t stride = 32;
|
|
while (p < end)
|
|
{
|
|
asm volatile("fdc (%0)\n\t"
|
|
"sync\n\t"
|
|
"fic,m %1(%%sr4, %0)\n\t"
|
|
"sync" : "+r"(p) : "r"(stride) : "memory");
|
|
}
|
|
}
|
|
|
|
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|