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 llvm::sys::SmartScopedWriter<true> Writer(&SymbolsLock);
71 // Ignore VC++ runtimes prior to 7.1. Somehow some of them get loaded
73 if (stricmp(ModuleName, "msvci70") != 0 &&
74 stricmp(ModuleName, "msvcirt") != 0 &&
75 stricmp(ModuleName, "msvcp50") != 0 &&
76 stricmp(ModuleName, "msvcp60") != 0 &&
77 stricmp(ModuleName, "msvcp70") != 0 &&
78 stricmp(ModuleName, "msvcr70") != 0 &&
80 // Mingw32 uses msvcrt.dll by default. Don't ignore it.
81 // Otherwise, user should be aware, what he's doing :)
82 stricmp(ModuleName, "msvcrt") != 0 &&
84 stricmp(ModuleName, "msvcrt20") != 0 &&
85 stricmp(ModuleName, "msvcrt40") != 0) {
86 OpenedHandles.push_back((HMODULE)ModuleBase);
92 DynamicLibrary::DynamicLibrary() : handle(0) {
93 SmartScopedWriter<true> Writer(&SymbolsLock);
94 handle = GetModuleHandle(NULL);
95 OpenedHandles.push_back((HMODULE)handle);
98 DynamicLibrary::~DynamicLibrary() {
99 llvm::sys::SmartScopedWriter<true> Writer(&SymbolsLock);
103 // GetModuleHandle() does not increment the ref count, so we must not free
104 // the handle to the executable.
105 if (handle != GetModuleHandle(NULL))
106 FreeLibrary((HMODULE)handle);
109 for (std::vector<HMODULE>::iterator I = OpenedHandles.begin(),
110 E = OpenedHandles.end(); I != E; ++I) {
112 // Note: don't use the swap/pop_back trick here. Order is important.
113 OpenedHandles.erase(I);
118 bool DynamicLibrary::LoadLibraryPermanently(const char *filename,
119 std::string *ErrMsg) {
121 llvm::sys::SmartScopedWriter<true> Writer(&SymbolsLock);
122 HMODULE a_handle = LoadLibrary(filename);
125 return MakeErrMsg(ErrMsg, std::string(filename) + ": Can't open : ");
127 OpenedHandles.push_back(a_handle);
129 // When no file is specified, enumerate all DLLs and EXEs in the
131 EnumerateLoadedModules(GetCurrentProcess(), ELM_Callback, 0);
134 // Because we don't remember the handle, we will never free it; hence,
135 // it is loaded permanently.
139 // Stack probing routines are in the support library (e.g. libgcc), but we don't
140 // have dynamic linking on windows. Provide a hook.
141 #if defined(__MINGW32__) || defined (_MSC_VER)
142 #define EXPLICIT_SYMBOL(SYM) \
143 if (!strcmp(symbolName, #SYM)) return (void*)&SYM
144 #define EXPLICIT_SYMBOL2(SYMFROM, SYMTO) \
145 if (!strcmp(symbolName, #SYMFROM)) return (void*)&SYMTO
146 #define EXPLICIT_SYMBOL_DEF(SYM) \
147 extern "C" { extern void *SYM; }
149 #if defined(__MINGW32__)
150 EXPLICIT_SYMBOL_DEF(_alloca);
151 EXPLICIT_SYMBOL_DEF(__main);
152 EXPLICIT_SYMBOL_DEF(__ashldi3);
153 EXPLICIT_SYMBOL_DEF(__ashrdi3);
154 EXPLICIT_SYMBOL_DEF(__cmpdi2);
155 EXPLICIT_SYMBOL_DEF(__divdi3);
156 EXPLICIT_SYMBOL_DEF(__fixdfdi);
157 EXPLICIT_SYMBOL_DEF(__fixsfdi);
158 EXPLICIT_SYMBOL_DEF(__fixunsdfdi);
159 EXPLICIT_SYMBOL_DEF(__fixunssfdi);
160 EXPLICIT_SYMBOL_DEF(__floatdidf);
161 EXPLICIT_SYMBOL_DEF(__floatdisf);
162 EXPLICIT_SYMBOL_DEF(__lshrdi3);
163 EXPLICIT_SYMBOL_DEF(__moddi3);
164 EXPLICIT_SYMBOL_DEF(__udivdi3);
165 EXPLICIT_SYMBOL_DEF(__umoddi3);
166 #elif defined(_MSC_VER)
167 EXPLICIT_SYMBOL_DEF(_alloca_probe);
171 void* DynamicLibrary::SearchForAddressOfSymbol(const char* symbolName) {
172 // First check symbols added via AddSymbol().
173 SymbolsLock.reader_acquire();
174 std::map<std::string, void *>::iterator I = symbols.find(symbolName);
175 std::map<std::string, void *>::iterator E = symbols.end();
176 SymbolsLock.reader_release();
180 // Now search the libraries.
181 SymbolsLock.writer_acquire();
182 for (std::vector<HMODULE>::iterator I = OpenedHandles.begin(),
183 E = OpenedHandles.end(); I != E; ++I) {
184 FARPROC ptr = GetProcAddress((HMODULE)*I, symbolName);
186 SymbolsLock.writer_release();
190 SymbolsLock.writer_release();
192 #if defined(__MINGW32__)
194 EXPLICIT_SYMBOL(_alloca);
195 EXPLICIT_SYMBOL(__main);
196 EXPLICIT_SYMBOL(__ashldi3);
197 EXPLICIT_SYMBOL(__ashrdi3);
198 EXPLICIT_SYMBOL(__cmpdi2);
199 EXPLICIT_SYMBOL(__divdi3);
200 EXPLICIT_SYMBOL(__fixdfdi);
201 EXPLICIT_SYMBOL(__fixsfdi);
202 EXPLICIT_SYMBOL(__fixunsdfdi);
203 EXPLICIT_SYMBOL(__fixunssfdi);
204 EXPLICIT_SYMBOL(__floatdidf);
205 EXPLICIT_SYMBOL(__floatdisf);
206 EXPLICIT_SYMBOL(__lshrdi3);
207 EXPLICIT_SYMBOL(__moddi3);
208 EXPLICIT_SYMBOL(__udivdi3);
209 EXPLICIT_SYMBOL(__umoddi3);
211 EXPLICIT_SYMBOL2(alloca, _alloca);
212 #undef EXPLICIT_SYMBOL
213 #undef EXPLICIT_SYMBOL2
214 #undef EXPLICIT_SYMBOL_DEF
216 #elif defined(_MSC_VER)
218 EXPLICIT_SYMBOL2(alloca, _alloca_probe);
219 EXPLICIT_SYMBOL2(_alloca, _alloca_probe);
220 #undef EXPLICIT_SYMBOL
221 #undef EXPLICIT_SYMBOL2
222 #undef EXPLICIT_SYMBOL_DEF