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
29 #include <com/sun/star/uno/genfunc.hxx>
30 #include "com/sun/star/uno/RuntimeException.hpp"
31 #include <uno/data.h>
32 #include <typelib/typedescription.hxx>
33
34 #include "bridges/cpp_uno/shared/bridge.hxx"
35 #include "bridges/cpp_uno/shared/cppinterfaceproxy.hxx"
36 #include "bridges/cpp_uno/shared/types.hxx"
37 #include "bridges/cpp_uno/shared/vtablefactory.hxx"
38
39 #include "share.hxx"
40
41 using namespace ::com::sun::star::uno;
42
43 namespace
44 {
45
46 //==================================================================================================
cpp2uno_call(bridges::cpp_uno::shared::CppInterfaceProxy * pThis,const typelib_TypeDescription * pMemberTypeDescr,typelib_TypeDescriptionReference * pReturnTypeRef,sal_Int32 nParams,typelib_MethodParameter * pParams,void ** pCallStack,sal_Int64 * pRegisterReturn)47 static typelib_TypeClass cpp2uno_call(
48 bridges::cpp_uno::shared::CppInterfaceProxy * pThis,
49 const typelib_TypeDescription * pMemberTypeDescr,
50 typelib_TypeDescriptionReference * pReturnTypeRef, // 0 indicates void return
51 sal_Int32 nParams, typelib_MethodParameter * pParams,
52 void ** pCallStack,
53 sal_Int64 * pRegisterReturn /* space for register return */ )
54 {
55 // pCallStack: ret, [return ptr], this, params
56 char * pCppStack = (char *)(pCallStack +1);
57
58 // return
59 typelib_TypeDescription * pReturnTypeDescr = 0;
60 if (pReturnTypeRef)
61 TYPELIB_DANGER_GET( &pReturnTypeDescr, pReturnTypeRef );
62
63 void * pUnoReturn = 0;
64 void * pCppReturn = 0; // complex return ptr: if != 0 && != pUnoReturn, reconversion need
65
66 if (pReturnTypeDescr)
67 {
68 if (bridges::cpp_uno::shared::isSimpleType( pReturnTypeDescr ))
69 {
70 pUnoReturn = pRegisterReturn; // direct way for simple types
71 }
72 else // complex return via ptr (pCppReturn)
73 {
74 pCppReturn = *(void **)pCppStack;
75 pCppStack += sizeof(void *);
76
77 pUnoReturn = (bridges::cpp_uno::shared::relatesToInterfaceType(
78 pReturnTypeDescr )
79 ? alloca( pReturnTypeDescr->nSize )
80 : pCppReturn); // direct way
81 }
82 }
83 // pop this
84 pCppStack += sizeof( void* );
85
86 // stack space
87 OSL_ENSURE( sizeof(void *) == sizeof(sal_Int32), "### unexpected size!" );
88 // parameters
89 void ** pUnoArgs = (void **)alloca( 4 * sizeof(void *) * nParams );
90 void ** pCppArgs = pUnoArgs + nParams;
91 // indizes of values this have to be converted (interface conversion cpp<=>uno)
92 sal_Int32 * pTempIndizes = (sal_Int32 *)(pUnoArgs + (2 * nParams));
93 // type descriptions for reconversions
94 typelib_TypeDescription ** ppTempParamTypeDescr = (typelib_TypeDescription **)(pUnoArgs + (3 * nParams));
95
96 sal_Int32 nTempIndizes = 0;
97
98 for ( sal_Int32 nPos = 0; nPos < nParams; ++nPos )
99 {
100 const typelib_MethodParameter & rParam = pParams[nPos];
101 typelib_TypeDescription * pParamTypeDescr = 0;
102 TYPELIB_DANGER_GET( &pParamTypeDescr, rParam.pTypeRef );
103
104 if (!rParam.bOut
105 && bridges::cpp_uno::shared::isSimpleType( pParamTypeDescr ))
106 // value
107 {
108 pCppArgs[nPos] = pCppStack;
109 pUnoArgs[nPos] = pCppStack;
110 switch (pParamTypeDescr->eTypeClass)
111 {
112 case typelib_TypeClass_HYPER:
113 case typelib_TypeClass_UNSIGNED_HYPER:
114 case typelib_TypeClass_DOUBLE:
115 pCppStack += sizeof(sal_Int32); // extra long
116 }
117 // no longer needed
118 TYPELIB_DANGER_RELEASE( pParamTypeDescr );
119 }
120 else // ptr to complex value | ref
121 {
122 pCppArgs[nPos] = *(void **)pCppStack;
123
124 if (! rParam.bIn) // is pure out
125 {
126 // uno out is unconstructed mem!
127 pUnoArgs[nPos] = alloca( pParamTypeDescr->nSize );
128 pTempIndizes[nTempIndizes] = nPos;
129 // will be released at reconversion
130 ppTempParamTypeDescr[nTempIndizes++] = pParamTypeDescr;
131 }
132 // is in/inout
133 else if (bridges::cpp_uno::shared::relatesToInterfaceType(
134 pParamTypeDescr ))
135 {
136 uno_copyAndConvertData( pUnoArgs[nPos] = alloca( pParamTypeDescr->nSize ),
137 *(void **)pCppStack, pParamTypeDescr,
138 pThis->getBridge()->getCpp2Uno() );
139 pTempIndizes[nTempIndizes] = nPos; // has to be reconverted
140 // will be released at reconversion
141 ppTempParamTypeDescr[nTempIndizes++] = pParamTypeDescr;
142 }
143 else // direct way
144 {
145 pUnoArgs[nPos] = *(void **)pCppStack;
146 // no longer needed
147 TYPELIB_DANGER_RELEASE( pParamTypeDescr );
148 }
149 }
150 pCppStack += sizeof(sal_Int32); // standard parameter length
151 }
152
153 // ExceptionHolder
154 uno_Any aUnoExc; // Any will be constructed by callee
155 uno_Any * pUnoExc = &aUnoExc;
156
157 // invoke uno dispatch call
158 (*pThis->getUnoI()->pDispatcher)(
159 pThis->getUnoI(), pMemberTypeDescr, pUnoReturn, pUnoArgs, &pUnoExc );
160
161 // in case an exception occurred...
162 if (pUnoExc)
163 {
164 // destruct temporary in/inout params
165 for ( ; nTempIndizes--; )
166 {
167 sal_Int32 nIndex = pTempIndizes[nTempIndizes];
168
169 if (pParams[nIndex].bIn) // is in/inout => was constructed
170 uno_destructData( pUnoArgs[nIndex], ppTempParamTypeDescr[nTempIndizes], 0 );
171 TYPELIB_DANGER_RELEASE( ppTempParamTypeDescr[nTempIndizes] );
172 }
173 if (pReturnTypeDescr)
174 TYPELIB_DANGER_RELEASE( pReturnTypeDescr );
175
176 CPPU_CURRENT_NAMESPACE::raiseException(
177 &aUnoExc, pThis->getBridge()->getUno2Cpp() );
178 // has to destruct the any
179 // is here for dummy
180 return typelib_TypeClass_VOID;
181 }
182 else // else no exception occurred...
183 {
184 // temporary params
185 for ( ; nTempIndizes--; )
186 {
187 sal_Int32 nIndex = pTempIndizes[nTempIndizes];
188 typelib_TypeDescription * pParamTypeDescr = ppTempParamTypeDescr[nTempIndizes];
189
190 if (pParams[nIndex].bOut) // inout/out
191 {
192 // convert and assign
193 uno_destructData( pCppArgs[nIndex], pParamTypeDescr, cpp_release );
194 uno_copyAndConvertData( pCppArgs[nIndex], pUnoArgs[nIndex], pParamTypeDescr,
195 pThis->getBridge()->getUno2Cpp() );
196 }
197 // destroy temp uno param
198 uno_destructData( pUnoArgs[nIndex], pParamTypeDescr, 0 );
199
200 TYPELIB_DANGER_RELEASE( pParamTypeDescr );
201 }
202 // return
203 if (pCppReturn) // has complex return
204 {
205 if (pUnoReturn != pCppReturn) // needs reconversion
206 {
207 uno_copyAndConvertData( pCppReturn, pUnoReturn, pReturnTypeDescr,
208 pThis->getBridge()->getUno2Cpp() );
209 // destroy temp uno return
210 uno_destructData( pUnoReturn, pReturnTypeDescr, 0 );
211 }
212 // complex return ptr is set to eax
213 *(void **)pRegisterReturn = pCppReturn;
214 }
215 if (pReturnTypeDescr)
216 {
217 typelib_TypeClass eRet = (typelib_TypeClass)pReturnTypeDescr->eTypeClass;
218 TYPELIB_DANGER_RELEASE( pReturnTypeDescr );
219 return eRet;
220 }
221 else
222 return typelib_TypeClass_VOID;
223 }
224 }
225
226
227 //==================================================================================================
cpp_mediate(sal_Int32 nFunctionIndex,sal_Int32 nVtableOffset,void ** pCallStack,sal_Int64 * pRegisterReturn)228 static typelib_TypeClass cpp_mediate(
229 sal_Int32 nFunctionIndex,
230 sal_Int32 nVtableOffset,
231 void ** pCallStack,
232 sal_Int64 * pRegisterReturn /* space for register return */ )
233 {
234 OSL_ENSURE( sizeof(sal_Int32)==sizeof(void *), "### unexpected!" );
235
236 // pCallStack: ret adr, [ret *], this, params
237 void * pThis;
238 if( nFunctionIndex & 0x80000000 )
239 {
240 nFunctionIndex &= 0x7fffffff;
241 pThis = pCallStack[2];
242 }
243 else
244 {
245 pThis = pCallStack[1];
246 }
247 pThis = static_cast< char * >(pThis) - nVtableOffset;
248 bridges::cpp_uno::shared::CppInterfaceProxy * pCppI
249 = bridges::cpp_uno::shared::CppInterfaceProxy::castInterfaceToProxy(
250 pThis);
251
252 typelib_InterfaceTypeDescription * pTypeDescr = pCppI->getTypeDescr();
253
254 OSL_ENSURE( nFunctionIndex < pTypeDescr->nMapFunctionIndexToMemberIndex, "### illegal vtable index!" );
255 if (nFunctionIndex >= pTypeDescr->nMapFunctionIndexToMemberIndex)
256 {
257 throw RuntimeException(
258 rtl::OUString::createFromAscii("illegal vtable index!"),
259 (XInterface *)pThis );
260 }
261
262 // determine called method
263 sal_Int32 nMemberPos = pTypeDescr->pMapFunctionIndexToMemberIndex[nFunctionIndex];
264 OSL_ENSURE( nMemberPos < pTypeDescr->nAllMembers, "### illegal member index!" );
265
266 TypeDescription aMemberDescr( pTypeDescr->ppAllMembers[nMemberPos] );
267
268 typelib_TypeClass eRet;
269 switch (aMemberDescr.get()->eTypeClass)
270 {
271 case typelib_TypeClass_INTERFACE_ATTRIBUTE:
272 {
273 if (pTypeDescr->pMapMemberIndexToFunctionIndex[nMemberPos] == nFunctionIndex)
274 {
275 // is GET method
276 eRet = cpp2uno_call(
277 pCppI, aMemberDescr.get(),
278 ((typelib_InterfaceAttributeTypeDescription *)aMemberDescr.get())->pAttributeTypeRef,
279 0, 0, // no params
280 pCallStack, pRegisterReturn );
281 }
282 else
283 {
284 // is SET method
285 typelib_MethodParameter aParam;
286 aParam.pTypeRef =
287 ((typelib_InterfaceAttributeTypeDescription *)aMemberDescr.get())->pAttributeTypeRef;
288 aParam.bIn = sal_True;
289 aParam.bOut = sal_False;
290
291 eRet = cpp2uno_call(
292 pCppI, aMemberDescr.get(),
293 0, // indicates void return
294 1, &aParam,
295 pCallStack, pRegisterReturn );
296 }
297 break;
298 }
299 case typelib_TypeClass_INTERFACE_METHOD:
300 {
301 // is METHOD
302 switch (nFunctionIndex)
303 {
304 case 1: // acquire()
305 pCppI->acquireProxy(); // non virtual call!
306 eRet = typelib_TypeClass_VOID;
307 break;
308 case 2: // release()
309 pCppI->releaseProxy(); // non virtual call!
310 eRet = typelib_TypeClass_VOID;
311 break;
312 case 0: // queryInterface() opt
313 {
314 typelib_TypeDescription * pTD = 0;
315 TYPELIB_DANGER_GET( &pTD, reinterpret_cast< Type * >( pCallStack[3] )->getTypeLibType() );
316 if (pTD)
317 {
318 XInterface * pInterface = 0;
319 (*pCppI->getBridge()->getCppEnv()->getRegisteredInterface)(
320 pCppI->getBridge()->getCppEnv(),
321 (void **)&pInterface, pCppI->getOid().pData,
322 (typelib_InterfaceTypeDescription *)pTD );
323
324 if (pInterface)
325 {
326 ::uno_any_construct(
327 reinterpret_cast< uno_Any * >( pCallStack[1] ),
328 &pInterface, pTD, cpp_acquire );
329 pInterface->release();
330 TYPELIB_DANGER_RELEASE( pTD );
331 *(void **)pRegisterReturn = pCallStack[1];
332 eRet = typelib_TypeClass_ANY;
333 break;
334 }
335 TYPELIB_DANGER_RELEASE( pTD );
336 }
337 } // else perform queryInterface()
338 default:
339 eRet = cpp2uno_call(
340 pCppI, aMemberDescr.get(),
341 ((typelib_InterfaceMethodTypeDescription *)aMemberDescr.get())->pReturnTypeRef,
342 ((typelib_InterfaceMethodTypeDescription *)aMemberDescr.get())->nParams,
343 ((typelib_InterfaceMethodTypeDescription *)aMemberDescr.get())->pParams,
344 pCallStack, pRegisterReturn );
345 }
346 break;
347 }
348 default:
349 {
350 throw RuntimeException(
351 rtl::OUString::createFromAscii("no member description found!"),
352 (XInterface *)pThis );
353 // is here for dummy
354 eRet = typelib_TypeClass_VOID;
355 }
356 }
357
358 return eRet;
359 }
360
361 //==================================================================================================
362 /**
363 * is called on incoming vtable calls
364 * (called by asm snippets)
365 */
366 static void cpp_vtable_call(
367 int nFunctionIndex, int nVtableOffset, void** pCallStack )
368 __attribute__((regparm(3)));
369
cpp_vtable_call(int nFunctionIndex,int nVtableOffset,void ** pCallStack)370 void cpp_vtable_call( int nFunctionIndex, int nVtableOffset, void** pCallStack )
371 {
372 volatile long nRegReturn[2];
373 typelib_TypeClass aType = cpp_mediate(
374 nFunctionIndex, nVtableOffset, pCallStack, (sal_Int64*)nRegReturn );
375
376 switch( aType )
377 {
378 case typelib_TypeClass_HYPER:
379 case typelib_TypeClass_UNSIGNED_HYPER:
380 __asm__( "movl %1, %%edx\n\t"
381 "movl %0, %%eax\n"
382 : : "m"(nRegReturn[0]), "m"(nRegReturn[1]) );
383 break;
384 case typelib_TypeClass_FLOAT:
385 __asm__( "flds %0\n\t"
386 "fstp %%st(0)\n\t"
387 "flds %0\n"
388 : : "m"(*(float *)nRegReturn) );
389 break;
390 case typelib_TypeClass_DOUBLE:
391 __asm__( "fldl %0\n\t"
392 "fstp %%st(0)\n\t"
393 "fldl %0\n"
394 : : "m"(*(double *)nRegReturn) );
395 break;
396 // case typelib_TypeClass_UNSIGNED_SHORT:
397 // case typelib_TypeClass_SHORT:
398 // __asm__( "movswl %0, %%eax\n"
399 // : : "m"(nRegReturn) );
400 // break;
401 default:
402 __asm__( "movl %0, %%eax\n"
403 : : "m"(nRegReturn[0]) );
404 break;
405 }
406 }
407
408
409 //==================================================================================================
410 int const codeSnippetSize = 20;
411
codeSnippet(unsigned char * code,sal_Int32 functionIndex,sal_Int32 vtableOffset,bool simpleRetType)412 unsigned char * codeSnippet(
413 unsigned char * code, sal_Int32 functionIndex, sal_Int32 vtableOffset,
414 bool simpleRetType)
415 {
416 if (!simpleRetType) {
417 functionIndex |= 0x80000000;
418 }
419 unsigned char * p = code;
420 OSL_ASSERT(sizeof (sal_Int32) == 4);
421 // mov function_index, %eax:
422 *p++ = 0xB8;
423 *reinterpret_cast< sal_Int32 * >(p) = functionIndex;
424 p += sizeof (sal_Int32);
425 // mov vtable_offset, %edx:
426 *p++ = 0xBA;
427 *reinterpret_cast< sal_Int32 * >(p) = vtableOffset;
428 p += sizeof (sal_Int32);
429 // mov %esp, %ecx:
430 *p++ = 0x89;
431 *p++ = 0xE1;
432 // jmp cpp_vtable_call:
433 *p++ = 0xE9;
434 *reinterpret_cast< sal_Int32 * >(p)
435 = ((unsigned char *) cpp_vtable_call) - p - sizeof (sal_Int32);
436 p += sizeof (sal_Int32);
437 OSL_ASSERT(p - code <= codeSnippetSize);
438 return code + codeSnippetSize;
439 }
440
441 }
442
443 struct bridges::cpp_uno::shared::VtableFactory::Slot { void * fn; };
444
445 bridges::cpp_uno::shared::VtableFactory::Slot *
mapBlockToVtable(void * block)446 bridges::cpp_uno::shared::VtableFactory::mapBlockToVtable(void * block)
447 {
448 return static_cast< Slot * >(block) + 2;
449 }
450
getBlockSize(sal_Int32 slotCount)451 sal_Size bridges::cpp_uno::shared::VtableFactory::getBlockSize(
452 sal_Int32 slotCount)
453 {
454 return (slotCount + 2) * sizeof (Slot) + slotCount * codeSnippetSize;
455 }
456
457 bridges::cpp_uno::shared::VtableFactory::Slot *
initializeBlock(void * block,sal_Int32 slotCount)458 bridges::cpp_uno::shared::VtableFactory::initializeBlock(
459 void * block, sal_Int32 slotCount)
460 {
461 Slot * slots = mapBlockToVtable(block);
462 slots[-2].fn = 0;
463 slots[-1].fn = 0;
464 return slots + slotCount;
465 }
466
addLocalFunctions(Slot ** slots,unsigned char * code,typelib_InterfaceTypeDescription const * type,sal_Int32 functionOffset,sal_Int32 functionCount,sal_Int32 vtableOffset)467 unsigned char * bridges::cpp_uno::shared::VtableFactory::addLocalFunctions(
468 Slot ** slots, unsigned char * code,
469 typelib_InterfaceTypeDescription const * type, sal_Int32 functionOffset,
470 sal_Int32 functionCount, sal_Int32 vtableOffset)
471 {
472 (*slots) -= functionCount;
473 Slot * s = *slots;
474 for (sal_Int32 i = 0; i < type->nMembers; ++i) {
475 typelib_TypeDescription * member = 0;
476 TYPELIB_DANGER_GET(&member, type->ppMembers[i]);
477 OSL_ASSERT(member != 0);
478 switch (member->eTypeClass) {
479 case typelib_TypeClass_INTERFACE_ATTRIBUTE:
480 // Getter:
481 (s++)->fn = code;
482 code = codeSnippet(
483 code, functionOffset++, vtableOffset,
484 bridges::cpp_uno::shared::isSimpleType(
485 reinterpret_cast<
486 typelib_InterfaceAttributeTypeDescription * >(
487 member)->pAttributeTypeRef));
488 // Setter:
489 if (!reinterpret_cast<
490 typelib_InterfaceAttributeTypeDescription * >(
491 member)->bReadOnly)
492 {
493 (s++)->fn = code;
494 code = codeSnippet(code, functionOffset++, vtableOffset, true);
495 }
496 break;
497
498 case typelib_TypeClass_INTERFACE_METHOD:
499 (s++)->fn = code;
500 code = codeSnippet(
501 code, functionOffset++, vtableOffset,
502 bridges::cpp_uno::shared::isSimpleType(
503 reinterpret_cast<
504 typelib_InterfaceMethodTypeDescription * >(
505 member)->pReturnTypeRef));
506 break;
507
508 default:
509 OSL_ASSERT(false);
510 break;
511 }
512 TYPELIB_DANGER_RELEASE(member);
513 }
514 return code;
515 }
516
flushCode(unsigned char const *,unsigned char const *)517 void bridges::cpp_uno::shared::VtableFactory::flushCode(
518 unsigned char const *, unsigned char const *)
519 {}
520