/* -*- 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 <malloc.h>
#include <com/sun/star/uno/genfunc.hxx>
#include <sal/log.hxx>
#include <uno/data.h>
#include <typelib/typedescription.hxx>
#include "bridge.hxx"
#include "cppinterfaceproxy.hxx"
#include "types.hxx"
#include "vtablefactory.hxx"
#include "msci.hxx"
using namespace ::com::sun::star::uno;
namespace
{
static inline typelib_TypeClass 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,
sal_Int64 * pRegisterReturn /* space for register return */ )
{
// pCallStack: ret, this, [complex return ptr], params
char * pCppStack = (char *)(pCallStack +2);
// return
typelib_TypeDescription * pReturnTypeDescr = 0;
if (pReturnTypeRef)
{
TYPELIB_DANGER_GET( &pReturnTypeDescr, pReturnTypeRef );
}
void * pUnoReturn = 0;
void * pCppReturn = 0; // complex return ptr: if != 0 && != pUnoReturn, reconversion need
if (pReturnTypeDescr)
{
if (bridges::cpp_uno::shared::isSimpleType( pReturnTypeDescr ))
{
pUnoReturn = pRegisterReturn; // direct way for simple types
}
else // complex return via ptr (pCppReturn)
{
pCppReturn = *(void **)pCppStack;
pCppStack += sizeof(void *);
pUnoReturn = (bridges::cpp_uno::shared::relatesToInterfaceType(
pReturnTypeDescr )
? alloca( pReturnTypeDescr->nSize )
: pCppReturn); // direct way
}
}
// stack space
static_assert(sizeof(void *) == sizeof(sal_Int32), "### unexpected size!");
// parameters
void ** pUnoArgs = (void **)alloca( 4 * sizeof(void *) * nParams );
void ** pCppArgs = pUnoArgs + nParams;
// indices of values this have to be converted (interface conversion cpp<=>uno)
sal_Int32 * pTempIndices = (sal_Int32 *)(pUnoArgs + (2 * nParams));
// type descriptions for reconversions
typelib_TypeDescription ** ppTempParamTypeDescr = (typelib_TypeDescription **)(pUnoArgs + (3 * nParams));
sal_Int32 nTempIndices = 0;
for ( sal_Int32 nPos = 0; nPos < nParams; ++nPos )
{
const typelib_MethodParameter & rParam = pParams[nPos];
typelib_TypeDescription * pParamTypeDescr = 0;
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] = *(void **)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 ),
*(void **)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] = *(void **)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
while (nTempIndices--)
{
sal_Int32 nIndex = pTempIndices[nTempIndices];
if (pParams[nIndex].bIn) // is in/inout => was constructed
{
::uno_destructData( pUnoArgs[nIndex], ppTempParamTypeDescr[nTempIndices], 0 );
}
TYPELIB_DANGER_RELEASE( ppTempParamTypeDescr[nTempIndices] );
}
if (pReturnTypeDescr)
{
TYPELIB_DANGER_RELEASE( pReturnTypeDescr );
}
CPPU_CURRENT_NAMESPACE::msci_raiseException(
&aUnoExc, pThis->getBridge()->getUno2Cpp() );
// has to destruct the any
// is here for dummy
return typelib_TypeClass_VOID;
}
else // else no exception occurred...
{
// temporary params
while (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, 0 );
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, 0 );
}
// complex return ptr is set to eax
*(void **)pRegisterReturn = pCppReturn;
}
if (pReturnTypeDescr)
{
typelib_TypeClass eRet = (typelib_TypeClass)pReturnTypeDescr->eTypeClass;
TYPELIB_DANGER_RELEASE( pReturnTypeDescr );
return eRet;
}
else
return typelib_TypeClass_VOID;
}
}
static typelib_TypeClass __cdecl cpp_mediate(
void ** pCallStack, sal_Int32 nFunctionIndex, sal_Int32 nVtableOffset,
sal_Int64 * pRegisterReturn /* space for register return */ )
{
static_assert(sizeof(sal_Int32)==sizeof(void *), "### unexpected!");
// pCallStack: ret adr, this, [ret *], params
void * pThis = static_cast< char * >(pCallStack[1]) - nVtableOffset;
bridges::cpp_uno::shared::CppInterfaceProxy * pCppI
= bridges::cpp_uno::shared::CppInterfaceProxy::castInterfaceToProxy(
pThis);
typelib_InterfaceTypeDescription * pTypeDescr = pCppI->getTypeDescr();
SAL_INFO( "bridges.win32", "cpp_vtable_call: pCallStack=[" <<
std::hex << pCallStack[0] << "," << pCallStack[1] << "," << pCallStack[2] << ",...]" <<
", pThis=" << pThis << ", pCppI=" << pCppI <<
std::dec << ", nFunctionIndex=" << nFunctionIndex << ", nVtableOffset=" << nVtableOffset );
SAL_INFO( "bridges.win32", "name=" << OUString::unacquired(&pTypeDescr->aBase.pTypeName) );
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)),
(XInterface *)pThis );
}
// determine called method
sal_Int32 nMemberPos = pTypeDescr->pMapFunctionIndexToMemberIndex[nFunctionIndex];
assert(nMemberPos < pTypeDescr->nAllMembers);
TypeDescription aMemberDescr( pTypeDescr->ppAllMembers[nMemberPos] );
SAL_INFO( "bridges.win32", "Calling " << OUString::unacquired(&aMemberDescr.get()->pTypeName) );
typelib_TypeClass eRet = typelib_TypeClass_VOID;
switch (aMemberDescr.get()->eTypeClass)
{
case typelib_TypeClass_INTERFACE_ATTRIBUTE:
{
if (pTypeDescr->pMapMemberIndexToFunctionIndex[nMemberPos] == nFunctionIndex)
{
// is GET method
eRet = cpp2uno_call(
pCppI, aMemberDescr.get(),
((typelib_InterfaceAttributeTypeDescription *)aMemberDescr.get())->pAttributeTypeRef,
0, 0, // no params
pCallStack, 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,
pCallStack, pRegisterReturn );
}
break;
}
case typelib_TypeClass_INTERFACE_METHOD:
{
// is METHOD
switch (nFunctionIndex)
{
// standard XInterface vtable calls
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 * >( pCallStack[3] )->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 * >( pCallStack[2] ),
&pInterface, pTD, cpp_acquire );
pInterface->release();
TYPELIB_DANGER_RELEASE( pTD );
*(void **)pRegisterReturn = pCallStack[2];
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,
pCallStack, pRegisterReturn );
}
break;
}
default:
{
throw RuntimeException( "no member description found!", (XInterface *)pThis );
}
}
return eRet;
}
/**
* is called on incoming vtable calls
* (called by asm snippets)
*/
static __declspec(naked) void __cdecl cpp_vtable_call()
{
__asm
{
sub esp, 8 // space for immediate return type
push esp
push edx // vtable offset
push eax // function index
mov eax, esp
add eax, 20
push eax // original stack ptr
call cpp_mediate
add esp, 16
cmp eax, typelib_TypeClass_FLOAT
je Lfloat
cmp eax, typelib_TypeClass_DOUBLE
je Ldouble
cmp eax, typelib_TypeClass_HYPER
je Lhyper
cmp eax, typelib_TypeClass_UNSIGNED_HYPER
je Lhyper
// rest is eax
pop eax
add esp, 4
ret
Lhyper:
pop eax
pop edx
ret
Lfloat:
fld dword ptr [esp]
add esp, 8
ret
Ldouble:
fld qword ptr [esp]
add esp, 8
ret
}
}
int const codeSnippetSize = 16;
unsigned char * codeSnippet(
unsigned char * code, sal_Int32 functionIndex, sal_Int32 vtableOffset)
{
unsigned char * p = code;
static_assert(sizeof (sal_Int32) == 4, "boo");
// mov eax, functionIndex:
*p++ = 0xB8;
*reinterpret_cast< sal_Int32 * >(p) = functionIndex;
p += sizeof (sal_Int32);
// mov edx, vtableOffset:
*p++ = 0xBA;
*reinterpret_cast< sal_Int32 * >(p) = vtableOffset;
p += sizeof (sal_Int32);
// jmp rel32 cpp_vtable_call:
*p++ = 0xE9;
*reinterpret_cast< sal_Int32 * >(p)
= ((unsigned char *) cpp_vtable_call) - p - sizeof (sal_Int32);
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) + 1;
}
std::size_t bridges::cpp_uno::shared::VtableFactory::getBlockSize(
sal_Int32 slotCount)
{
return (slotCount + 1) * 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 *)
{
struct Rtti {
sal_Int32 n0, n1, n2;
type_info * rtti;
Rtti():
n0(0), n1(0), n2(0),
rtti(CPPU_CURRENT_NAMESPACE::msci_getRTTI(
OUString("com.sun.star.uno.XInterface")))
{}
};
static Rtti rtti;
Slot * slots = mapBlockToVtable(block);
slots[-1].fn = &rtti;
return slots + slotCount;
}
unsigned char * bridges::cpp_uno::shared::VtableFactory::addLocalFunctions(
Slot ** slots, unsigned char * code,
typelib_InterfaceTypeDescription const *, sal_Int32 functionOffset,
sal_Int32 functionCount, sal_Int32 vtableOffset)
{
(*slots) -= functionCount;
Slot * s = *slots;
for (sal_Int32 i = 0; i < functionCount; ++i) {
(s++)->fn = code;
code = codeSnippet(code, functionOffset++, vtableOffset);
}
return code;
}
void bridges::cpp_uno::shared::VtableFactory::flushCode(
unsigned char const *, unsigned char const *)
{}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
↑ V505 The 'alloca' function is used inside the loop. This can quickly overflow stack.
↑ V505 The 'alloca' function is used inside the loop. This can quickly overflow stack.