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7afa3e9fd4
MSVC learned to not emit unreferenced symbols with internal linkage and the hooks were defined in unnamed namespace which forces internal linkage, even if you mark a variable `extern`. Since Boost does not have a stable ABI, does not mangle the namespace with the version, and the hooks are in `boost` namespace (`boost::on_*`) -- there is no point in trying to hide some symbols because mixing different versions of boost static libraries will not work already. I also renamed the `__xl_ca` variable for consistency and because using double underscored identifiers is forbidden. (`[lex.name]/3`) The `extern const` is for verbosity and because they are indeed const (it is done via pragma already).
347 lines
11 KiB
C++
347 lines
11 KiB
C++
// $Id$
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// (C) Copyright Aaron W. LaFramboise, Roland Schwarz, Michael Glassford 2004.
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// (C) Copyright 2007 Roland Schwarz
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// (C) Copyright 2007 Anthony Williams
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// (C) Copyright 2007 David Deakins
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// Use, modification and distribution are subject to the
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// Boost Software License, Version 1.0. (See accompanying file
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// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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#include <boost/winapi/config.hpp>
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#include <boost/thread/detail/config.hpp>
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#if defined(BOOST_THREAD_WIN32) && defined(BOOST_THREAD_BUILD_LIB)
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#if (defined(__MINGW32__) && !defined(_WIN64)) || defined(__MINGW64__) || (__MINGW64_VERSION_MAJOR)
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#include <boost/thread/detail/tss_hooks.hpp>
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#include <windows.h>
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#include <cstdlib>
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namespace boost
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{
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void tss_cleanup_implemented() {}
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}
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namespace {
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void NTAPI on_tls_callback(void* , DWORD dwReason, PVOID )
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{
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switch (dwReason)
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{
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case DLL_THREAD_DETACH:
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{
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boost::on_thread_exit();
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break;
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}
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}
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}
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}
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#if defined(__MINGW64__) || (__MINGW64_VERSION_MAJOR) || (__MINGW32__) || (__MINGW32_MAJOR_VERSION >3) || \
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((__MINGW32_MAJOR_VERSION==3) && (__MINGW32_MINOR_VERSION>=18))
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extern "C"
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{
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PIMAGE_TLS_CALLBACK __crt_xl_tls_callback__ __attribute__ ((section(".CRT$XLB"))) = on_tls_callback;
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}
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#else
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extern "C" {
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void (* after_ctors )() __attribute__((section(".ctors"))) = boost::on_process_enter;
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void (* before_dtors)() __attribute__((section(".dtors"))) = boost::on_thread_exit;
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void (* after_dtors )() __attribute__((section(".dtors.zzz"))) = boost::on_process_exit;
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ULONG __tls_index__ = 0;
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char __tls_end__ __attribute__((section(".tls$zzz"))) = 0;
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char __tls_start__ __attribute__((section(".tls"))) = 0;
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PIMAGE_TLS_CALLBACK __crt_xl_start__ __attribute__ ((section(".CRT$XLA"))) = 0;
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PIMAGE_TLS_CALLBACK __crt_xl_end__ __attribute__ ((section(".CRT$XLZ"))) = 0;
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}
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extern "C" const IMAGE_TLS_DIRECTORY32 _tls_used __attribute__ ((section(".rdata$T"))) =
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{
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(DWORD) &__tls_start__,
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(DWORD) &__tls_end__,
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(DWORD) &__tls_index__,
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(DWORD) (&__crt_xl_start__+1),
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(DWORD) 0,
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(DWORD) 0
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};
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#endif
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#elif defined(_MSC_VER) && !defined(UNDER_CE)
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#include <boost/thread/detail/tss_hooks.hpp>
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#include <stdlib.h>
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#include <windows.h>
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// _pRawDllMainOrig can be defined by including boost/thread/win32/mfc_thread_init.hpp
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// into your dll; it ensures that MFC-Dll-initialization will be done properly
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// The following code is adapted from the MFC-Dll-init code
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/*
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* _pRawDllMainOrig MUST be an extern const variable, which will be aliased to
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* _pDefaultRawDllMainOrig if no real user definition is present, thanks to the
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* alternatename directive.
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*/
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// work at least with _MSC_VER 1500 (MSVC++ 9.0, VS 2008)
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#if (_MSC_VER >= 1500)
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extern "C" {
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extern BOOL (WINAPI * const _pRawDllMainOrig)(HINSTANCE, DWORD, LPVOID);
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extern BOOL (WINAPI * const _pDefaultRawDllMainOrig)(HINSTANCE, DWORD, LPVOID) = NULL;
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#if defined (_M_IX86)
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#pragma comment(linker, "/alternatename:__pRawDllMainOrig=__pDefaultRawDllMainOrig")
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#elif defined (_M_X64) || defined (_M_ARM) || defined (_M_ARM64)
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#pragma comment(linker, "/alternatename:_pRawDllMainOrig=_pDefaultRawDllMainOrig")
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#else /* unknown Windows target (not x86, x64, ARM, ARM64) */
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#error Unsupported platform
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#endif /* defined (_M_X64) || defined (_M_ARM) || defined (_M_ARM64) */
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}
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#endif
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//Definitions required by implementation
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#if (_MSC_VER < 1300) || ((_MSC_VER > 1900) && (_MSC_VER < 1910)) // 1300 == VC++ 7.0, 1900 == VC++ 14.0, 1910 == VC++ 2017
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typedef void ( __cdecl *_PVFV_ )();
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typedef void ( __cdecl *_PIFV_ )();
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#define INIRETSUCCESS_V
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#define INIRETSUCCESS_I
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#define PVAPI_V void __cdecl
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#define PVAPI_I void __cdecl
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#elif (_MSC_VER >= 1910)
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typedef void ( __cdecl *_PVFV_ )();
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typedef int ( __cdecl *_PIFV_ )();
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#define INIRETSUCCESS_V
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#define INIRETSUCCESS_I 0
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#define PVAPI_V void __cdecl
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#define PVAPI_I int __cdecl
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#else
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typedef int ( __cdecl *_PVFV_ )();
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typedef int ( __cdecl *_PIFV_ )();
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#define INIRETSUCCESS_V 0
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#define INIRETSUCCESS_I 0
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#define PVAPI_V int __cdecl
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#define PVAPI_I int __cdecl
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#endif
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typedef void (NTAPI* _TLSCB)(HINSTANCE, DWORD, PVOID);
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//Symbols for connection to the runtime environment
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extern "C"
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{
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extern DWORD _tls_used; //the tls directory (located in .rdata segment)
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extern _TLSCB __xl_a[], __xl_z[]; //tls initializers */
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}
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namespace
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{
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//Forward declarations
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static PVAPI_I on_tls_prepare();
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static PVAPI_V on_process_init();
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static PVAPI_V on_process_term();
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static void NTAPI on_tls_callback(HINSTANCE, DWORD, PVOID);
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}
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namespace boost
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{
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//The .CRT$Xxx information is taken from Codeguru:
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//http://www.codeguru.com/Cpp/misc/misc/threadsprocesses/article.php/c6945__2/
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// Variables below are not referenced anywhere and
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// to not be optimized away has to have external linkage
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#if (_MSC_VER >= 1400)
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#pragma section(".CRT$XIU",long,read)
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#pragma section(".CRT$XCU",long,read)
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#pragma section(".CRT$XTU",long,read)
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#pragma section(".CRT$XLC",long,read)
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extern const __declspec(allocate(".CRT$XLC")) _TLSCB p_tls_callback = on_tls_callback;
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extern const __declspec(allocate(".CRT$XIU")) _PIFV_ p_tls_prepare = on_tls_prepare;
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extern const __declspec(allocate(".CRT$XCU")) _PVFV_ p_process_init = on_process_init;
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extern const __declspec(allocate(".CRT$XTU")) _PVFV_ p_process_term = on_process_term;
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#else
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#if (_MSC_VER >= 1300) // 1300 == VC++ 7.0
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# pragma data_seg(push, old_seg)
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#endif
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//Callback to run tls glue code first.
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//I don't think it is necessary to run it
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//at .CRT$XIB level, since we are only
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//interested in thread detachement. But
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//this could be changed easily if required.
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#pragma data_seg(".CRT$XIU")
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extern const _PIFV_ p_tls_prepare = on_tls_prepare;
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#pragma data_seg()
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//Callback after all global ctors.
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#pragma data_seg(".CRT$XCU")
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extern const _PVFV_ p_process_init = on_process_init;
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#pragma data_seg()
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//Callback for tls notifications.
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#pragma data_seg(".CRT$XLB")
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extern const _TLSCB p_thread_callback = on_tls_callback;
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#pragma data_seg()
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//Callback for termination.
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#pragma data_seg(".CRT$XTU")
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extern const _PVFV_ p_process_term = on_process_term;
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#pragma data_seg()
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#if (_MSC_VER >= 1300) // 1300 == VC++ 7.0
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# pragma data_seg(pop, old_seg)
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#endif
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#endif
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} // namespace boost
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namespace
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{
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#ifdef BOOST_MSVC
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#pragma warning(push)
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#pragma warning(disable:4189)
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#endif
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PVAPI_I on_tls_prepare()
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{
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//The following line has an important side effect:
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//if the TLS directory is not already there, it will
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//be created by the linker. In other words, it forces a tls
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//directory to be generated by the linker even when static tls
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//(i.e. __declspec(thread)) is not used.
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//The volatile should prevent the optimizer
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//from removing the reference.
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DWORD volatile dw = _tls_used;
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#if (_MSC_VER < 1300) // 1300 == VC++ 7.0
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_TLSCB* pfbegin = __xl_a;
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_TLSCB* pfend = __xl_z;
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_TLSCB* pfdst = pfbegin;
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//pfdst = (_TLSCB*)_tls_used.AddressOfCallBacks;
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//The following loop will merge the address pointers
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//into a contiguous area, since the tlssup code seems
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//to require this (at least on MSVC 6)
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while (pfbegin < pfend)
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{
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if (*pfbegin != 0)
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{
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*pfdst = *pfbegin;
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++pfdst;
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}
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++pfbegin;
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}
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*pfdst = 0;
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#endif
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return INIRETSUCCESS_I;
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}
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#ifdef BOOST_MSVC
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#pragma warning(pop)
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#endif
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PVAPI_V on_process_init()
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{
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//Schedule on_thread_exit() to be called for the main
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//thread before destructors of global objects have been
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//called.
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//It will not be run when 'quick' exiting the
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//library; however, this is the standard behaviour
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//for destructors of global objects, so that
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//shouldn't be a problem.
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atexit(boost::on_thread_exit);
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//Call Boost process entry callback here
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boost::on_process_enter();
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return INIRETSUCCESS_V;
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}
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PVAPI_V on_process_term()
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{
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boost::on_process_exit();
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return INIRETSUCCESS_V;
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}
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void NTAPI on_tls_callback(HINSTANCE /*h*/, DWORD dwReason, PVOID /*pv*/)
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{
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switch (dwReason)
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{
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case DLL_THREAD_DETACH:
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boost::on_thread_exit();
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break;
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}
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}
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#if (_MSC_VER >= 1500)
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BOOL WINAPI dll_callback(HINSTANCE hInstance, DWORD dwReason, LPVOID lpReserved)
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#else
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BOOL WINAPI dll_callback(HINSTANCE, DWORD dwReason, LPVOID)
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#endif
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{
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switch (dwReason)
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{
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case DLL_THREAD_DETACH:
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boost::on_thread_exit();
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break;
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case DLL_PROCESS_DETACH:
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boost::on_process_exit();
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break;
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}
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#if (_MSC_VER >= 1500)
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if( _pRawDllMainOrig )
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{
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return _pRawDllMainOrig(hInstance, dwReason, lpReserved);
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}
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#endif
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return true;
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}
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} //namespace
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extern "C"
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{
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extern BOOL (WINAPI * const _pRawDllMain)(HINSTANCE, DWORD, LPVOID)=&dll_callback;
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}
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namespace boost
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{
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void tss_cleanup_implemented()
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{
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/*
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This function's sole purpose is to cause a link error in cases where
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automatic tss cleanup is not implemented by Boost.Threads as a
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reminder that user code is responsible for calling the necessary
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functions at the appropriate times (and for implementing an a
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tss_cleanup_implemented() function to eliminate the linker's
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missing symbol error).
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If Boost.Threads later implements automatic tss cleanup in cases
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where it currently doesn't (which is the plan), the duplicate
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symbol error will warn the user that their custom solution is no
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longer needed and can be removed.
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*/
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}
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}
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#endif //defined(_MSC_VER) && !defined(UNDER_CE)
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#endif //defined(BOOST_THREAD_WIN32) && defined(BOOST_THREAD_BUILD_LIB)
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