367 lines
12 KiB
C++
367 lines
12 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 <typeinfo>
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#include <dlfcn.h>
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#include <boost/static_assert.hpp>
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#include <boost/unordered_map.hpp>
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#include <rtl/strbuf.hxx>
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#include <rtl/ustrbuf.hxx>
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#include <osl/diagnose.h>
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#include <osl/mutex.hxx>
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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 <com/sun/star/ucb/InteractiveAugmentedIOException.hpp>
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#include <com/sun/star/ucb/NameClashException.hpp>
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#include <typelib/typedescription.hxx>
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#include <uno/any2.h>
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#include "share.hxx"
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using namespace ::osl;
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using namespace ::com::sun::star::uno;
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namespace CPPU_CURRENT_NAMESPACE {
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namespace {
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struct Fake_type_info {
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virtual ~Fake_type_info() {}
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char const * name;
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};
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BOOST_STATIC_ASSERT(
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sizeof (Fake_type_info) == sizeof (std::type_info));
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struct Fake_class_type_info: Fake_type_info {};
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struct Fake_si_class_type_info: Fake_class_type_info {
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void const * base;
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};
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struct Base {};
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struct Derived: Base {};
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std::type_info * createFake_class_type_info(char const * name) {
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char * buf = new char[sizeof (Fake_class_type_info)];
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*reinterpret_cast<void **>(buf) = *reinterpret_cast<void * const *>(
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&typeid(Base));
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// copy __cxxabiv1::__class_type_info vtable into place
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Fake_class_type_info * fake = reinterpret_cast<Fake_class_type_info *>(buf);
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fake->name = name;
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#ifdef _LIBCPP_NONUNIQUE_RTTI_BIT
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*(uintptr_t*)(&fake->name) |= _LIBCPP_NONUNIQUE_RTTI_BIT;
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#endif
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return reinterpret_cast<std::type_info *>(
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static_cast<Fake_type_info *>(fake));
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}
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std::type_info * createFake_si_class_type_info(
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char const * name, std::type_info const * base)
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{
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char * buf = new char[sizeof (Fake_si_class_type_info)];
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*reinterpret_cast<void **>(buf) = *reinterpret_cast<void * const *>(
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&typeid(Derived));
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// copy __cxxabiv1::__si_class_type_info vtable into place
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Fake_si_class_type_info * fake
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= reinterpret_cast<Fake_si_class_type_info *>(buf);
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fake->name = name;
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#ifdef _LIBCPP_NONUNIQUE_RTTI_BIT
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*(uintptr_t*)(&fake->name) |= _LIBCPP_NONUNIQUE_RTTI_BIT;
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#endif
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fake->base = base;
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return reinterpret_cast<std::type_info *>(
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static_cast<Fake_type_info *>(fake));
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}
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}
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void dummy_can_throw_anything( char const * )
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{
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}
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static OUString toUNOname( char const * p )
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{
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// example: N3com3sun4star4lang24IllegalArgumentExceptionE
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OUStringBuffer buf( 64 );
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assert( 'N' == *p );
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++p; // skip N
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while ('E' != *p)
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{
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// read chars count
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long n = (*p++ - '0');
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while ('0' <= *p && '9' >= *p)
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{
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n *= 10;
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n += (*p++ - '0');
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}
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buf.appendAscii( p, n );
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p += n;
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if ('E' != *p)
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buf.append( '.' );
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}
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OUString result( buf.makeStringAndClear() );
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return result;
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}
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class RTTI
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{
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typedef boost::unordered_map< OUString, std::type_info *, OUStringHash > t_rtti_map;
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Mutex m_mutex;
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t_rtti_map m_rttis;
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t_rtti_map m_generatedRttis;
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void * m_hApp;
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public:
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RTTI();
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~RTTI();
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std::type_info * getRTTI( typelib_CompoundTypeDescription * );
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};
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RTTI::RTTI()
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: m_hApp( dlopen( 0, RTLD_LAZY ) )
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{
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// Insert commonly needed type_infos to avoid dlsym() calls
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// Ideally we should insert all needed ones, and we actually must,
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// for arm64, as the dynamically generated type_infos don't seem
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// to work correctly. Luckily it seems that quite few types of
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// exceptions are thrown through the C++/UNO bridge at least in
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// the TiledLibreOffice test app.
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// (As no Java, Basic or Python is supported in LO code on iOS, we
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// can know the set of types of exceptions throws a priori, so
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// keeping this list complete should be possible.)
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m_rttis.insert( t_rtti_map::value_type( "com.sun.star.ucb.InteractiveAugmentedIOException",
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(std::type_info*) &typeid( com::sun::star::ucb::InteractiveAugmentedIOException ) ) );
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m_rttis.insert( t_rtti_map::value_type( "com.sun.star.ucb.NameClashException",
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(std::type_info*) &typeid( com::sun::star::ucb::NameClashException ) ) );
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}
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RTTI::~RTTI()
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{
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dlclose( m_hApp );
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}
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std::type_info * RTTI::getRTTI( typelib_CompoundTypeDescription *pTypeDescr )
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{
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std::type_info * rtti;
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OUString const & unoName = *(OUString const *)&pTypeDescr->aBase.pTypeName;
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MutexGuard guard( m_mutex );
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t_rtti_map::const_iterator iFind( m_rttis.find( unoName ) );
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if (iFind == m_rttis.end())
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{
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// RTTI symbol
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OStringBuffer buf( 64 );
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buf.append( "_ZTIN" );
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sal_Int32 index = 0;
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do
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{
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OUString token( unoName.getToken( 0, '.', index ) );
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buf.append( token.getLength() );
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OString c_token( OUStringToOString( token, RTL_TEXTENCODING_ASCII_US ) );
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buf.append( c_token );
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}
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while (index >= 0);
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buf.append( 'E' );
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OString symName( buf.makeStringAndClear() );
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rtti = (std::type_info *)dlsym( m_hApp, symName.getStr() );
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if (rtti)
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{
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SAL_INFO( "bridges.ios", "getRTTI: dlsym() found type_info for " << unoName << ": " << symName );
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std::pair< t_rtti_map::iterator, bool > insertion(
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m_rttis.insert( t_rtti_map::value_type( unoName, rtti ) ) );
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SAL_WARN_IF( !insertion.second,
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"bridges",
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"inserting new rtti failed" );
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}
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else
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{
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SAL_INFO( "bridges.ios", "getRTTI: dlsym() could NOT find type_info for " << unoName << ": " << symName );
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// try to lookup the symbol in the generated rtti map
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t_rtti_map::const_iterator iFind2( m_generatedRttis.find( unoName ) );
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if (iFind2 == m_generatedRttis.end())
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{
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// we must generate it !
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// symbol and rtti-name is nearly identical,
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// the symbol is prefixed with _ZTI
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char * rttiName = strdup(symName.getStr() + 4);
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if (rttiName == 0) {
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throw std::bad_alloc();
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}
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SAL_INFO( "bridges.ios", "getRTTI: generating typeinfo " << rttiName );
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if (pTypeDescr->pBaseTypeDescription)
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{
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// ensure availability of base
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std::type_info * base_rtti = getRTTI(
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(typelib_CompoundTypeDescription *)pTypeDescr->pBaseTypeDescription );
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rtti = createFake_si_class_type_info(rttiName, base_rtti);
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}
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else
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{
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rtti = createFake_class_type_info(rttiName);
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}
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std::pair< t_rtti_map::iterator, bool > insertion(
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m_generatedRttis.insert( t_rtti_map::value_type( unoName, rtti ) ) );
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SAL_WARN_IF( !insertion.second,
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"bridges",
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"inserting new generated rtti failed" );
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}
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else // taking already generated rtti
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{
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rtti = iFind2->second;
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}
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}
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}
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else
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{
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rtti = iFind->second;
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}
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return rtti;
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}
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static void deleteException( void * pExc )
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{
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__cxa_exception const * header = ((__cxa_exception const *)pExc - 1);
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typelib_TypeDescription * pTD = 0;
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OUString unoName( toUNOname( header->exceptionType->name() ) );
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::typelib_typedescription_getByName( &pTD, unoName.pData );
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OSL_ENSURE( pTD, "### unknown exception type! leaving out destruction => leaking!!!" );
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if (pTD)
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{
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::uno_destructData( pExc, pTD, cpp_release );
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::typelib_typedescription_release( pTD );
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}
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}
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void raiseException( uno_Any * pUnoExc, uno_Mapping * pUno2Cpp )
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{
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SAL_INFO( "bridges.ios", "raiseException: " << *reinterpret_cast< OUString const * >( &pUnoExc->pType->pTypeName ) );
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void * pCppExc;
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std::type_info * rtti;
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{
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// construct cpp exception object
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typelib_TypeDescription * pTypeDescr = 0;
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TYPELIB_DANGER_GET( &pTypeDescr, pUnoExc->pType );
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OSL_ASSERT( pTypeDescr );
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if (! pTypeDescr)
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{
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throw RuntimeException(
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OUString("cannot get typedescription for type ") +
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*reinterpret_cast< OUString const * >( &pUnoExc->pType->pTypeName ) );
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}
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pCppExc = __cxa_allocate_exception( pTypeDescr->nSize );
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::uno_copyAndConvertData( pCppExc, pUnoExc->pData, pTypeDescr, pUno2Cpp );
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// destruct uno exception
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::uno_any_destruct( pUnoExc, 0 );
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// avoiding locked counts
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static RTTI * s_rtti = 0;
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if (! s_rtti)
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{
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MutexGuard guard( Mutex::getGlobalMutex() );
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if (! s_rtti)
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{
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#ifdef LEAK_STATIC_DATA
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s_rtti = new RTTI();
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#else
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static RTTI rtti_data;
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s_rtti = &rtti_data;
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#endif
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}
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}
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rtti = s_rtti->getRTTI( (typelib_CompoundTypeDescription *) pTypeDescr );
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TYPELIB_DANGER_RELEASE( pTypeDescr );
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assert( rtti );
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if (! rtti)
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{
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throw RuntimeException(
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OUString("no rtti for type ") +
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*reinterpret_cast< OUString const * >( &pUnoExc->pType->pTypeName ) );
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}
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}
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__cxa_throw( pCppExc, rtti, deleteException );
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}
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void fillUnoException( __cxa_exception * header, uno_Any * pUnoExc, uno_Mapping * pCpp2Uno )
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{
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if (! header)
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{
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RuntimeException aRE( "no exception header!" );
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Type const & rType = ::getCppuType( &aRE );
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uno_type_any_constructAndConvert( pUnoExc, &aRE, rType.getTypeLibType(), pCpp2Uno );
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#if OSL_DEBUG_LEVEL > 0
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OString cstr( OUStringToOString( aRE.Message, RTL_TEXTENCODING_ASCII_US ) );
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OSL_FAIL( cstr.getStr() );
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#endif
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return;
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}
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typelib_TypeDescription * pExcTypeDescr = 0;
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OUString unoName( toUNOname( header->exceptionType->name() ) );
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SAL_INFO( "bridges.ios", "fillUnoException: " << unoName );
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typelib_typedescription_getByName( &pExcTypeDescr, unoName.pData );
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if (0 == pExcTypeDescr)
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{
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RuntimeException aRE( OUString("exception type not found: ") + unoName );
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Type const & rType = ::getCppuType( &aRE );
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uno_type_any_constructAndConvert( pUnoExc, &aRE, rType.getTypeLibType(), pCpp2Uno );
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#if OSL_DEBUG_LEVEL > 0
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OString cstr( OUStringToOString( aRE.Message, RTL_TEXTENCODING_ASCII_US ) );
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OSL_FAIL( cstr.getStr() );
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#endif
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}
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else
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{
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// construct uno exception any
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uno_any_constructAndConvert( pUnoExc, header->adjustedPtr, pExcTypeDescr, pCpp2Uno );
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typelib_typedescription_release( pExcTypeDescr );
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}
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}
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}
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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