382 lines
11 KiB
C++
382 lines
11 KiB
C++
/*************************************************************************
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*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* Copyright 2000, 2010 Oracle and/or its affiliates.
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*
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* OpenOffice.org - a multi-platform office productivity suite
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*
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* This file is part of OpenOffice.org.
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*
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* OpenOffice.org is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License version 3
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* only, as published by the Free Software Foundation.
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*
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* OpenOffice.org is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License version 3 for more details
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* (a copy is included in the LICENSE file that accompanied this code).
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*
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* You should have received a copy of the GNU Lesser General Public License
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* version 3 along with OpenOffice.org. If not, see
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* <http://www.openoffice.org/license.html>
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* for a copy of the LGPLv3 License.
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*
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************************************************************************/
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// MARKER(update_precomp.py): autogen include statement, do not remove
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#include "precompiled_bridges.hxx"
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#if defined OS2
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#define INCL_DOS
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#define INCL_DOSMISC
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#endif
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#include "bridges/cpp_uno/shared/vtablefactory.hxx"
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#include "guardedarray.hxx"
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#include "bridges/cpp_uno/shared/vtables.hxx"
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#include "osl/thread.h"
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#include "osl/security.hxx"
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#include "osl/file.hxx"
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#include "osl/diagnose.h"
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#include "osl/mutex.hxx"
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#include "rtl/alloc.h"
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#include "rtl/ustring.hxx"
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#include "sal/types.h"
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#include "typelib/typedescription.hxx"
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#include <hash_map>
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#include <new>
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#include <vector>
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#if defined SAL_UNX
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#include <unistd.h>
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#include <string.h>
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#include <sys/mman.h>
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#elif defined SAL_W32
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#define WIN32_LEAN_AND_MEAN
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#ifdef _MSC_VER
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#pragma warning(push,1) // disable warnings within system headers
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#endif
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#include <windows.h>
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#ifdef _MSC_VER
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#pragma warning(pop)
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#endif
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#elif defined SAL_OS2
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#define INCL_DOS
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#define INCL_DOSMISC
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#include <os2.h>
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#else
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#error Unsupported platform
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#endif
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using bridges::cpp_uno::shared::VtableFactory;
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namespace {
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extern "C" void * SAL_CALL allocExec(rtl_arena_type *, sal_Size * size) {
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sal_Size pagesize;
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#if defined SAL_UNX
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#if defined FREEBSD || defined NETBSD
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pagesize = getpagesize();
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#else
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pagesize = sysconf(_SC_PAGESIZE);
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#endif
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#elif defined SAL_W32
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SYSTEM_INFO info;
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GetSystemInfo(&info);
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pagesize = info.dwPageSize;
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#elif defined(SAL_OS2)
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ULONG ulPageSize;
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DosQuerySysInfo(QSV_PAGE_SIZE, QSV_PAGE_SIZE, &ulPageSize, sizeof(ULONG));
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pagesize = (sal_Size)ulPageSize;
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#else
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#error Unsupported platform
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#endif
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sal_Size n = (*size + (pagesize - 1)) & ~(pagesize - 1);
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void * p;
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#if defined SAL_UNX
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p = mmap(
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0, n, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANON, -1,
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0);
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if (p == MAP_FAILED) {
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p = 0;
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}
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else if (mprotect (static_cast<char*>(p), n, PROT_READ | PROT_WRITE | PROT_EXEC) == -1)
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{
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munmap (static_cast<char*>(p), n);
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p = 0;
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}
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#elif defined SAL_W32
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p = VirtualAlloc(0, n, MEM_COMMIT, PAGE_EXECUTE_READWRITE);
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#elif defined(SAL_OS2)
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p = 0;
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DosAllocMem( &p, n, PAG_COMMIT | PAG_READ | PAG_WRITE | OBJ_ANY);
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#endif
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if (p != 0) {
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*size = n;
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}
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return p;
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}
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extern "C" void SAL_CALL freeExec(
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rtl_arena_type *, void * address, sal_Size size)
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{
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#if defined SAL_UNX
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munmap(static_cast< char * >(address), size);
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#elif defined SAL_W32
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(void) size; // unused
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VirtualFree(address, 0, MEM_RELEASE);
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#elif defined(SAL_OS2)
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(void) DosFreeMem( address);
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#endif
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}
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}
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class VtableFactory::GuardedBlocks: public std::vector< Block > {
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public:
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GuardedBlocks(VtableFactory const & factory):
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m_factory(factory), m_guarded(true) {}
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~GuardedBlocks();
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void unguard() { m_guarded = false; }
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private:
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GuardedBlocks(GuardedBlocks &); // not implemented
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void operator =(GuardedBlocks); // not implemented
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VtableFactory const & m_factory;
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bool m_guarded;
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};
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VtableFactory::GuardedBlocks::~GuardedBlocks() {
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if (m_guarded) {
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for (iterator i(begin()); i != end(); ++i) {
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m_factory.freeBlock(*i);
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}
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}
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}
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class VtableFactory::BaseOffset {
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public:
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BaseOffset(typelib_InterfaceTypeDescription * type) { calculate(type, 0); }
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sal_Int32 getFunctionOffset(rtl::OUString const & name) const
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{ return m_map.find(name)->second; }
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private:
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sal_Int32 calculate(
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typelib_InterfaceTypeDescription * type, sal_Int32 offset);
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typedef std::hash_map< rtl::OUString, sal_Int32, rtl::OUStringHash > Map;
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Map m_map;
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};
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sal_Int32 VtableFactory::BaseOffset::calculate(
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typelib_InterfaceTypeDescription * type, sal_Int32 offset)
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{
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rtl::OUString name(type->aBase.pTypeName);
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if (m_map.find(name) == m_map.end()) {
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for (sal_Int32 i = 0; i < type->nBaseTypes; ++i) {
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offset = calculate(type->ppBaseTypes[i], offset);
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}
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m_map.insert(Map::value_type(name, offset));
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typelib_typedescription_complete(
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reinterpret_cast< typelib_TypeDescription ** >(&type));
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offset += bridges::cpp_uno::shared::getLocalFunctions(type);
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}
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return offset;
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}
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VtableFactory::VtableFactory(): m_arena(
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rtl_arena_create(
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"bridges::cpp_uno::shared::VtableFactory",
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sizeof (void *), // to satisfy alignment requirements
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0, reinterpret_cast< rtl_arena_type * >(-1), allocExec, freeExec, 0))
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{
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if (m_arena == 0) {
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throw std::bad_alloc();
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}
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}
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VtableFactory::~VtableFactory() {
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{
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osl::MutexGuard guard(m_mutex);
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for (Map::iterator i(m_map.begin()); i != m_map.end(); ++i) {
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for (sal_Int32 j = 0; j < i->second.count; ++j) {
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freeBlock(i->second.blocks[j]);
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}
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delete[] i->second.blocks;
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}
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}
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rtl_arena_destroy(m_arena);
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}
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VtableFactory::Vtables VtableFactory::getVtables(
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typelib_InterfaceTypeDescription * type)
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{
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rtl::OUString name(type->aBase.pTypeName);
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osl::MutexGuard guard(m_mutex);
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Map::iterator i(m_map.find(name));
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if (i == m_map.end()) {
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GuardedBlocks blocks(*this);
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createVtables(blocks, BaseOffset(type), type, true);
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Vtables vtables;
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OSL_ASSERT(blocks.size() <= SAL_MAX_INT32);
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vtables.count = static_cast< sal_Int32 >(blocks.size());
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bridges::cpp_uno::shared::GuardedArray< Block > guardedBlocks(
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new Block[vtables.count]);
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vtables.blocks = guardedBlocks.get();
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for (sal_Int32 j = 0; j < vtables.count; ++j) {
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vtables.blocks[j] = blocks[j];
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}
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i = m_map.insert(Map::value_type(name, vtables)).first;
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guardedBlocks.release();
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blocks.unguard();
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}
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return i->second;
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}
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#ifdef USE_DOUBLE_MMAP
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bool VtableFactory::createBlock(Block &block, sal_Int32 slotCount) const
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{
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sal_Size size = getBlockSize(slotCount);
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sal_Size pagesize = sysconf(_SC_PAGESIZE);
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block.size = (size + (pagesize - 1)) & ~(pagesize - 1);
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block.start = block.exec = NULL;
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block.fd = -1;
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osl::Security aSecurity;
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rtl::OUString strDirectory;
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rtl::OUString strURLDirectory;
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if (aSecurity.getHomeDir(strURLDirectory))
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osl::File::getSystemPathFromFileURL(strURLDirectory, strDirectory);
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for (int i = strDirectory.getLength() == 0 ? 1 : 0; i < 2; ++i)
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{
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if (!strDirectory.getLength())
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strDirectory = rtl::OUString::createFromAscii("/tmp");
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strDirectory += rtl::OUString::createFromAscii("/.execoooXXXXXX");
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rtl::OString aTmpName = rtl::OUStringToOString(strDirectory, osl_getThreadTextEncoding());
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char *tmpfname = new char[aTmpName.getLength()+1];
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strncpy(tmpfname, aTmpName.getStr(), aTmpName.getLength()+1);
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if ((block.fd = mkstemp(tmpfname)) == -1)
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perror("creation of executable memory area failed");
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if (block.fd == -1)
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{
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delete[] tmpfname;
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break;
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}
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unlink(tmpfname);
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delete[] tmpfname;
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if (ftruncate(block.fd, block.size) == -1)
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{
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perror("truncation of executable memory area failed");
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close(block.fd);
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block.fd = -1;
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break;
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}
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block.start = mmap(NULL, block.size, PROT_READ | PROT_WRITE, MAP_SHARED, block.fd, 0);
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if (block.start== MAP_FAILED) {
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block.start = 0;
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}
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block.exec = mmap(NULL, block.size, PROT_READ | PROT_EXEC, MAP_SHARED, block.fd, 0);
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if (block.exec == MAP_FAILED) {
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block.exec = 0;
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}
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//All good
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if (block.start && block.exec && block.fd != -1)
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break;
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freeBlock(block);
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strDirectory = rtl::OUString();
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}
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if (!block.start || !block.exec || block.fd == -1)
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{
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//Fall back to non-doublemmaped allocation
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block.fd = -1;
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block.start = block.exec = rtl_arena_alloc(m_arena, &block.size);
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}
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return (block.start != 0 && block.exec != 0);
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}
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void VtableFactory::freeBlock(Block const & block) const {
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//if the double-map failed we were allocated on the arena
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if (block.fd == -1 && block.start == block.exec && block.start != NULL)
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rtl_arena_free(m_arena, block.start, block.size);
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else
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{
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if (block.start) munmap(block.start, block.size);
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if (block.exec) munmap(block.exec, block.size);
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if (block.fd != -1) close(block.fd);
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}
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}
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#else
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bool VtableFactory::createBlock(Block &block, sal_Int32 slotCount) const
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{
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block.size = getBlockSize(slotCount);
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block.start = rtl_arena_alloc(m_arena, &block.size);
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return block.start != 0;
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}
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void VtableFactory::freeBlock(Block const & block) const {
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rtl_arena_free(m_arena, block.start, block.size);
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}
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#endif
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void VtableFactory::createVtables(
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GuardedBlocks & blocks, BaseOffset const & baseOffset,
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typelib_InterfaceTypeDescription * type, bool includePrimary) const
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{
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if (includePrimary) {
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sal_Int32 slotCount
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= bridges::cpp_uno::shared::getPrimaryFunctions(type);
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Block block;
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if (!createBlock(block, slotCount)) {
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throw std::bad_alloc();
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}
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try {
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Slot * slots = initializeBlock(block.start, slotCount);
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unsigned char * codeBegin =
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reinterpret_cast< unsigned char * >(slots);
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unsigned char * code = codeBegin;
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sal_Int32 vtableOffset = blocks.size() * sizeof (Slot *);
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for (typelib_InterfaceTypeDescription const * type2 = type;
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type2 != 0; type2 = type2->pBaseTypeDescription)
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{
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code = addLocalFunctions(
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&slots, code,
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#ifdef USE_DOUBLE_MMAP
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sal_IntPtr(block.exec) - sal_IntPtr(block.start),
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#endif
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type2,
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baseOffset.getFunctionOffset(type2->aBase.pTypeName),
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bridges::cpp_uno::shared::getLocalFunctions(type2),
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vtableOffset);
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}
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flushCode(codeBegin, code);
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#ifdef USE_DOUBLE_MMAP
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//Finished generating block, swap writable pointer with executable
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//pointer
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::std::swap(block.start, block.exec);
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#endif
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blocks.push_back(block);
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} catch (...) {
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freeBlock(block);
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throw;
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}
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}
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for (sal_Int32 i = 0; i < type->nBaseTypes; ++i) {
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createVtables(blocks, baseOffset, type->ppBaseTypes[i], i != 0);
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}
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}
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