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b5d3759fc5
MSVC's delayimp.lib does not actually free delayload dependencies. winecrt0's attempt to do so from ELF __attribute__((destructor)) is unnecessary and potentially harmful: - When triggered naturally via LdrUnloadDll, this leads to recursive calls to FreeLibrary, violating free_lib_count and missing DLL_PROCESS_DETACH - when triggered by glibc's _dl_fini (at process exit), it leads to use-after-free of the TEB (GetCurrentThreadID after the main thread is no longer Win32) via FreeLibrary -> LdrLdrUnloadDll -> RtlEnterCriticalSection( &loader_section ) - double-free of the library itself, since the DLL_PROCESS_DETACH has already been handled by LdrShutdownProcess - Race against wineserver sending a SIGKILL from process_killed, since all Win32 threads of the process have exited Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=53032
73 lines
2.5 KiB
C
73 lines
2.5 KiB
C
/*
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* Support for delayed imports
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*
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* Copyright 2005 Alexandre Julliard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include <stdarg.h>
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#include "windef.h"
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#include "winbase.h"
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#include "delayloadhandler.h"
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WINBASEAPI void *WINAPI DelayLoadFailureHook( LPCSTR name, LPCSTR function );
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#ifdef __WINE_PE_BUILD
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extern IMAGE_DOS_HEADER __ImageBase;
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WINBASEAPI void *WINAPI ResolveDelayLoadedAPI( void* base, const IMAGE_DELAYLOAD_DESCRIPTOR* desc,
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PDELAYLOAD_FAILURE_DLL_CALLBACK dllhook,
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PDELAYLOAD_FAILURE_SYSTEM_ROUTINE syshook,
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IMAGE_THUNK_DATA* addr, ULONG flags );
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FARPROC WINAPI __delayLoadHelper2( const IMAGE_DELAYLOAD_DESCRIPTOR *descr, IMAGE_THUNK_DATA *addr )
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{
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return ResolveDelayLoadedAPI( &__ImageBase, descr, NULL, DelayLoadFailureHook, addr, 0 );
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}
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#else /* __WINE_PE_BUILD */
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struct ImgDelayDescr
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{
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DWORD_PTR grAttrs;
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LPCSTR szName;
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HMODULE *phmod;
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IMAGE_THUNK_DATA *pIAT;
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const IMAGE_THUNK_DATA *pINT;
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const IMAGE_THUNK_DATA *pBoundIAT;
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const IMAGE_THUNK_DATA *pUnloadIAT;
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DWORD_PTR dwTimeStamp;
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};
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extern struct ImgDelayDescr __wine_spec_delay_imports[];
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FARPROC WINAPI DECLSPEC_HIDDEN __wine_spec_delay_load( unsigned int id )
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{
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struct ImgDelayDescr *descr = __wine_spec_delay_imports + HIWORD(id);
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WORD func = LOWORD(id);
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FARPROC proc;
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if (!*descr->phmod) *descr->phmod = LoadLibraryA( descr->szName );
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if (!*descr->phmod ||
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!(proc = GetProcAddress( *descr->phmod, (LPCSTR)descr->pINT[func].u1.Function )))
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proc = DelayLoadFailureHook( descr->szName, (LPCSTR)descr->pINT[func].u1.Function );
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descr->pIAT[func].u1.Function = (ULONG_PTR)proc;
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return proc;
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}
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#endif /* __WINE_PE_BUILD */
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