453688ccc6
This solves two problems: * The linked list is too slow, a map is better. A map cannot be used with statically allocated CVARs because order of initialization is undefined. * The current CVAR system is an unordered mishmash of static variables and dynamically allocated ones and the means of identification are unsafe. With this everything is allocated on the heap so it can all be handled the same by the cleanup code.
143 lines
5.1 KiB
C++
143 lines
5.1 KiB
C++
/*
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** autostart.cpp
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** This file contains the heads of lists stored in special data segments
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**
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**---------------------------------------------------------------------------
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** Copyright 1998-2006 Randy Heit
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** All rights reserved.
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**
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** Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions
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** are met:
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**
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** 1. Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** 2. Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in the
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** documentation and/or other materials provided with the distribution.
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** 3. The name of the author may not be used to endorse or promote products
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** derived from this software without specific prior written permission.
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**
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** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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**---------------------------------------------------------------------------
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**
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** The particular scheme used here was chosen because it's small.
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**
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** An alternative that will work with any C++ compiler is to use static
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** classes to build these lists at run time. Under Visual C++, doing things
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** that way can require a lot of extra space, which is why I'm doing things
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** this way.
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**
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** In the case of PClass lists (section creg), I orginally used the
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** constructor to do just that, and the code for that still exists if you
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** compile with something other than Visual C++ or GCC.
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*/
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#include "autosegs.h"
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#ifdef _WIN32
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#include <windows.h>
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#include <dbghelp.h>
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#elif defined __MACH__
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#include <mach-o/getsect.h>
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#include <mach-o/ldsyms.h>
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#endif
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#if defined _WIN32 || defined __MACH__
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#define AUTOSEG_VARIABLE(name, autoseg) namespace AutoSegs{ FAutoSeg name{ AUTOSEG_STR(autoseg) }; }
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#else // Linux and others with ELF executables
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#define AUTOSEG_START(name) __start_##name
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#define AUTOSEG_STOP(name) __stop_##name
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#define AUTOSEG_VARIABLE(name, autoseg) \
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void* name##DummyPointer __attribute__((section(AUTOSEG_STR(autoseg)))) __attribute__((used)); \
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extern void* AUTOSEG_START(autoseg); \
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extern void* AUTOSEG_STOP(autoseg); \
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namespace AutoSegs { FAutoSeg name{ &AUTOSEG_START(autoseg), &AUTOSEG_STOP(autoseg) }; }
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#endif
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AUTOSEG_VARIABLE(ActionFunctons, AUTOSEG_AREG)
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AUTOSEG_VARIABLE(TypeInfos, AUTOSEG_CREG)
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AUTOSEG_VARIABLE(ClassFields, AUTOSEG_FREG)
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AUTOSEG_VARIABLE(Properties, AUTOSEG_GREG)
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AUTOSEG_VARIABLE(MapInfoOptions, AUTOSEG_YREG)
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AUTOSEG_VARIABLE(CVarDecl, AUTOSEG_VREG)
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#undef AUTOSEG_VARIABLE
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#undef AUTOSEG_STOP
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#undef AUTOSEG_START
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void FAutoSeg::Initialize()
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{
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#ifdef _WIN32
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const HMODULE selfModule = GetModuleHandle(nullptr);
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const SIZE_T baseAddress = reinterpret_cast<SIZE_T>(selfModule);
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const PIMAGE_NT_HEADERS header = ImageNtHeader(selfModule);
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PIMAGE_SECTION_HEADER section = IMAGE_FIRST_SECTION(header);
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for (WORD i = 0; i < header->FileHeader.NumberOfSections; ++i, ++section)
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{
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if (strncmp(reinterpret_cast<char *>(section->Name), name, IMAGE_SIZEOF_SHORT_NAME) == 0)
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{
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begin = reinterpret_cast<void **>(baseAddress + section->VirtualAddress);
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end = reinterpret_cast<void **>(baseAddress + section->VirtualAddress + section->SizeOfRawData);
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break;
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}
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}
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#elif defined __MACH__
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unsigned long size;
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if (uint8_t *const section = getsectiondata(&_mh_execute_header, AUTOSEG_MACH_SEGMENT, name, &size))
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{
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begin = reinterpret_cast<void **>(section);
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end = reinterpret_cast<void **>(section + size);
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}
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#else // Linux and others with ELF executables
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assert(false);
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#endif
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}
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#if defined(_MSC_VER)
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// We want visual styles support under XP
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#if defined _M_IX86
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#pragma comment(linker,"/manifestdependency:\"type='win32' name='Microsoft.Windows.Common-Controls' version='6.0.0.0' processorArchitecture='x86' publicKeyToken='6595b64144ccf1df' language='*'\"")
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#elif defined _M_IA64
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#pragma comment(linker,"/manifestdependency:\"type='win32' name='Microsoft.Windows.Common-Controls' version='6.0.0.0' processorArchitecture='ia64' publicKeyToken='6595b64144ccf1df' language='*'\"")
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#elif defined _M_X64
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#pragma comment(linker,"/manifestdependency:\"type='win32' name='Microsoft.Windows.Common-Controls' version='6.0.0.0' processorArchitecture='amd64' publicKeyToken='6595b64144ccf1df' language='*'\"")
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#else
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#pragma comment(linker,"/manifestdependency:\"type='win32' name='Microsoft.Windows.Common-Controls' version='6.0.0.0' processorArchitecture='*' publicKeyToken='6595b64144ccf1df' language='*'\"")
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#endif
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#endif
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