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//===- Win32/DynamicLibrary.cpp - Win32 DL Implementation -------*- C++ -*-===//
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// The LLVM Compiler Infrastructure
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//===----------------------------------------------------------------------===//
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// This file provides the Win32 specific implementation of DynamicLibrary.
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//===----------------------------------------------------------------------===//
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#if (HAVE_LIBIMAGEHLP != 1)
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#error "libimagehlp.a should be present"
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#pragma comment(lib, "dbghelp.lib")
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//===----------------------------------------------------------------------===//
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//=== WARNING: Implementation here must contain only Win32 specific code
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//=== and must not be UNIX code.
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//===----------------------------------------------------------------------===//
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static std::vector<HMODULE> OpenedHandles;
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typedef DWORD64 ModuleBaseType;
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typedef ULONG ModuleBaseType;
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// Use old callback if:
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// - Not using Visual Studio
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// - Visual Studio 2005 or earlier but only if we are not using the Windows SDK
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// or Windows SDK version is older than 6.0
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// Use new callback if:
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// - Newer Visual Studio (comes with newer SDK).
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// - Visual Studio 2005 with Windows SDK 6.0+
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#if !defined(_MSC_VER) || _MSC_VER < 1500 && (!defined(VER_PRODUCTBUILD) || VER_PRODUCTBUILD < 6000)
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static BOOL CALLBACK ELM_Callback(PSTR ModuleName,
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ModuleBaseType ModuleBase,
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static BOOL CALLBACK ELM_Callback(PCSTR ModuleName,
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ModuleBaseType ModuleBase,
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// Ignore VC++ runtimes prior to 7.1. Somehow some of them get loaded
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if (stricmp(ModuleName, "msvci70") != 0 &&
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stricmp(ModuleName, "msvcirt") != 0 &&
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stricmp(ModuleName, "msvcp50") != 0 &&
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stricmp(ModuleName, "msvcp60") != 0 &&
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stricmp(ModuleName, "msvcp70") != 0 &&
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stricmp(ModuleName, "msvcr70") != 0 &&
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// Mingw32 uses msvcrt.dll by default. Don't ignore it.
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// Otherwise, user should be aware, what he's doing :)
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stricmp(ModuleName, "msvcrt") != 0 &&
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stricmp(ModuleName, "msvcrt20") != 0 &&
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stricmp(ModuleName, "msvcrt40") != 0) {
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OpenedHandles.push_back((HMODULE)ModuleBase);
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bool DynamicLibrary::LoadLibraryPermanently(const char *filename,
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std::string *ErrMsg) {
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HMODULE a_handle = LoadLibrary(filename);
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return MakeErrMsg(ErrMsg, std::string(filename) + ": Can't open : ");
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OpenedHandles.push_back(a_handle);
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// When no file is specified, enumerate all DLLs and EXEs in the
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EnumerateLoadedModules(GetCurrentProcess(), ELM_Callback, 0);
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// Because we don't remember the handle, we will never free it; hence,
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// it is loaded permanently.
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// Stack probing routines are in the support library (e.g. libgcc), but we don't
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// have dynamic linking on windows. Provide a hook.
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#if defined(__MINGW32__) || defined (_MSC_VER)
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#define EXPLICIT_SYMBOL(SYM) \
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if (!strcmp(symbolName, #SYM)) return (void*)&SYM
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#define EXPLICIT_SYMBOL2(SYMFROM, SYMTO) \
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if (!strcmp(symbolName, #SYMFROM)) return (void*)&SYMTO
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#define EXPLICIT_SYMBOL_DEF(SYM) \
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extern "C" { extern void *SYM; }
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#if defined(__MINGW32__)
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EXPLICIT_SYMBOL_DEF(_alloca)
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EXPLICIT_SYMBOL_DEF(__main)
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EXPLICIT_SYMBOL_DEF(__ashldi3)
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EXPLICIT_SYMBOL_DEF(__ashrdi3)
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EXPLICIT_SYMBOL_DEF(__cmpdi2)
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EXPLICIT_SYMBOL_DEF(__divdi3)
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EXPLICIT_SYMBOL_DEF(__fixdfdi)
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EXPLICIT_SYMBOL_DEF(__fixsfdi)
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EXPLICIT_SYMBOL_DEF(__fixunsdfdi)
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EXPLICIT_SYMBOL_DEF(__fixunssfdi)
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EXPLICIT_SYMBOL_DEF(__floatdidf)
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EXPLICIT_SYMBOL_DEF(__floatdisf)
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EXPLICIT_SYMBOL_DEF(__lshrdi3)
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EXPLICIT_SYMBOL_DEF(__moddi3)
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EXPLICIT_SYMBOL_DEF(__udivdi3)
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EXPLICIT_SYMBOL_DEF(__umoddi3)
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#elif defined(_MSC_VER)
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EXPLICIT_SYMBOL_DEF(_alloca_probe)
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void* DynamicLibrary::SearchForAddressOfSymbol(const char* symbolName) {
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// First check symbols added via AddSymbol().
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if (ExplicitSymbols) {
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std::map<std::string, void *>::iterator I =
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ExplicitSymbols->find(symbolName);
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std::map<std::string, void *>::iterator E = ExplicitSymbols->end();
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// Now search the libraries.
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for (std::vector<HMODULE>::iterator I = OpenedHandles.begin(),
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E = OpenedHandles.end(); I != E; ++I) {
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FARPROC ptr = GetProcAddress((HMODULE)*I, symbolName);
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#if defined(__MINGW32__)
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EXPLICIT_SYMBOL(_alloca);
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EXPLICIT_SYMBOL(__main);
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EXPLICIT_SYMBOL(__ashldi3);
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EXPLICIT_SYMBOL(__ashrdi3);
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EXPLICIT_SYMBOL(__cmpdi2);
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EXPLICIT_SYMBOL(__divdi3);
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EXPLICIT_SYMBOL(__fixdfdi);
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EXPLICIT_SYMBOL(__fixsfdi);
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EXPLICIT_SYMBOL(__fixunsdfdi);
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EXPLICIT_SYMBOL(__fixunssfdi);
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EXPLICIT_SYMBOL(__floatdidf);
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EXPLICIT_SYMBOL(__floatdisf);
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EXPLICIT_SYMBOL(__lshrdi3);
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EXPLICIT_SYMBOL(__moddi3);
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EXPLICIT_SYMBOL(__udivdi3);
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EXPLICIT_SYMBOL(__umoddi3);
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EXPLICIT_SYMBOL2(alloca, _alloca);
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#undef EXPLICIT_SYMBOL
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#undef EXPLICIT_SYMBOL2
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#undef EXPLICIT_SYMBOL_DEF
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#elif defined(_MSC_VER)
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EXPLICIT_SYMBOL2(alloca, _alloca_probe);
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EXPLICIT_SYMBOL2(_alloca, _alloca_probe);
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#undef EXPLICIT_SYMBOL
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#undef EXPLICIT_SYMBOL2
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#undef EXPLICIT_SYMBOL_DEF