1 //===- Win32/DynamicLibrary.cpp - Win32 DL Implementation -------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file provides the Win32 specific implementation of DynamicLibrary.
12 //===----------------------------------------------------------------------===//
27 #if (HAVE_LIBIMAGEHLP != 1)
28 #error "libimagehlp.a should be present"
31 #pragma comment(lib, "dbghelp.lib")
37 //===----------------------------------------------------------------------===//
38 //=== WARNING: Implementation here must contain only Win32 specific code
39 //=== and must not be UNIX code.
40 //===----------------------------------------------------------------------===//
42 static std::vector<HMODULE> OpenedHandles;
45 typedef DWORD64 ModuleBaseType;
47 typedef ULONG ModuleBaseType;
51 // Use old callback if:
52 // - Not using Visual Studio
53 // - Visual Studio 2005 or earlier but only if we are not using the Windows SDK
54 // or Windows SDK version is older than 6.0
55 // Use new callback if:
56 // - Newer Visual Studio (comes with newer SDK).
57 // - Visual Studio 2005 with Windows SDK 6.0+
58 #if !defined(_MSC_VER) || _MSC_VER < 1500 && (!defined(VER_PRODUCTBUILD) || VER_PRODUCTBUILD < 6000)
59 static BOOL CALLBACK ELM_Callback(PSTR ModuleName,
60 ModuleBaseType ModuleBase,
64 static BOOL CALLBACK ELM_Callback(PCSTR ModuleName,
65 ModuleBaseType ModuleBase,
70 // Ignore VC++ runtimes prior to 7.1. Somehow some of them get loaded
72 if (stricmp(ModuleName, "msvci70") != 0 &&
73 stricmp(ModuleName, "msvcirt") != 0 &&
74 stricmp(ModuleName, "msvcp50") != 0 &&
75 stricmp(ModuleName, "msvcp60") != 0 &&
76 stricmp(ModuleName, "msvcp70") != 0 &&
77 stricmp(ModuleName, "msvcr70") != 0 &&
79 // Mingw32 uses msvcrt.dll by default. Don't ignore it.
80 // Otherwise, user should be aware, what he's doing :)
81 stricmp(ModuleName, "msvcrt") != 0 &&
83 stricmp(ModuleName, "msvcrt20") != 0 &&
84 stricmp(ModuleName, "msvcrt40") != 0) {
85 OpenedHandles.push_back((HMODULE)ModuleBase);
91 DynamicLibrary::DynamicLibrary() : handle(0) {
92 handle = GetModuleHandle(NULL);
93 OpenedHandles.push_back((HMODULE)handle);
96 DynamicLibrary::~DynamicLibrary() {
100 // GetModuleHandle() does not increment the ref count, so we must not free
101 // the handle to the executable.
102 if (handle != GetModuleHandle(NULL))
103 FreeLibrary((HMODULE)handle);
106 for (std::vector<HMODULE>::iterator I = OpenedHandles.begin(),
107 E = OpenedHandles.end(); I != E; ++I) {
109 // Note: don't use the swap/pop_back trick here. Order is important.
110 OpenedHandles.erase(I);
115 bool DynamicLibrary::LoadLibraryPermanently(const char *filename,
116 std::string *ErrMsg) {
118 HMODULE a_handle = LoadLibrary(filename);
121 return MakeErrMsg(ErrMsg, std::string(filename) + ": Can't open : ");
123 OpenedHandles.push_back(a_handle);
125 // When no file is specified, enumerate all DLLs and EXEs in the
127 EnumerateLoadedModules(GetCurrentProcess(), ELM_Callback, 0);
130 // Because we don't remember the handle, we will never free it; hence,
131 // it is loaded permanently.
135 // Stack probing routines are in the support library (e.g. libgcc), but we don't
136 // have dynamic linking on windows. Provide a hook.
137 #if defined(__MINGW32__) || defined (_MSC_VER)
138 #define EXPLICIT_SYMBOL(SYM) \
139 if (!strcmp(symbolName, #SYM)) return (void*)&SYM
140 #define EXPLICIT_SYMBOL2(SYMFROM, SYMTO) \
141 if (!strcmp(symbolName, #SYMFROM)) return (void*)&SYMTO
142 #define EXPLICIT_SYMBOL_DEF(SYM) \
143 extern "C" { extern void *SYM; }
145 #if defined(__MINGW32__)
146 EXPLICIT_SYMBOL_DEF(_alloca);
147 EXPLICIT_SYMBOL_DEF(__main);
148 EXPLICIT_SYMBOL_DEF(__ashldi3);
149 EXPLICIT_SYMBOL_DEF(__ashrdi3);
150 EXPLICIT_SYMBOL_DEF(__cmpdi2);
151 EXPLICIT_SYMBOL_DEF(__divdi3);
152 EXPLICIT_SYMBOL_DEF(__fixdfdi);
153 EXPLICIT_SYMBOL_DEF(__fixsfdi);
154 EXPLICIT_SYMBOL_DEF(__fixunsdfdi);
155 EXPLICIT_SYMBOL_DEF(__fixunssfdi);
156 EXPLICIT_SYMBOL_DEF(__floatdidf);
157 EXPLICIT_SYMBOL_DEF(__floatdisf);
158 EXPLICIT_SYMBOL_DEF(__lshrdi3);
159 EXPLICIT_SYMBOL_DEF(__moddi3);
160 EXPLICIT_SYMBOL_DEF(__udivdi3);
161 EXPLICIT_SYMBOL_DEF(__umoddi3);
162 #elif defined(_MSC_VER)
163 EXPLICIT_SYMBOL_DEF(_alloca_probe);
167 void* DynamicLibrary::SearchForAddressOfSymbol(const char* symbolName) {
168 // First check symbols added via AddSymbol().
169 std::map<std::string, void *>::iterator I = g_symbols().find(symbolName);
170 if (I != g_symbols().end())
173 // Now search the libraries.
174 for (std::vector<HMODULE>::iterator I = OpenedHandles.begin(),
175 E = OpenedHandles.end(); I != E; ++I) {
176 FARPROC ptr = GetProcAddress((HMODULE)*I, symbolName);
181 #if defined(__MINGW32__)
183 EXPLICIT_SYMBOL(_alloca);
184 EXPLICIT_SYMBOL(__main);
185 EXPLICIT_SYMBOL(__ashldi3);
186 EXPLICIT_SYMBOL(__ashrdi3);
187 EXPLICIT_SYMBOL(__cmpdi2);
188 EXPLICIT_SYMBOL(__divdi3);
189 EXPLICIT_SYMBOL(__fixdfdi);
190 EXPLICIT_SYMBOL(__fixsfdi);
191 EXPLICIT_SYMBOL(__fixunsdfdi);
192 EXPLICIT_SYMBOL(__fixunssfdi);
193 EXPLICIT_SYMBOL(__floatdidf);
194 EXPLICIT_SYMBOL(__floatdisf);
195 EXPLICIT_SYMBOL(__lshrdi3);
196 EXPLICIT_SYMBOL(__moddi3);
197 EXPLICIT_SYMBOL(__udivdi3);
198 EXPLICIT_SYMBOL(__umoddi3);
200 EXPLICIT_SYMBOL2(alloca, _alloca);
201 #undef EXPLICIT_SYMBOL
202 #undef EXPLICIT_SYMBOL2
203 #undef EXPLICIT_SYMBOL_DEF
205 #elif defined(_MSC_VER)
207 EXPLICIT_SYMBOL2(alloca, _alloca_probe);
208 EXPLICIT_SYMBOL2(_alloca, _alloca_probe);
209 #undef EXPLICIT_SYMBOL
210 #undef EXPLICIT_SYMBOL2
211 #undef EXPLICIT_SYMBOL_DEF