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 //===----------------------------------------------------------------------===//
15 #include "llvm/System/RWMutex.h"
28 #if (HAVE_LIBIMAGEHLP != 1)
29 #error "libimagehlp.a should be present"
32 #pragma comment(lib, "dbghelp.lib")
38 //===----------------------------------------------------------------------===//
39 //=== WARNING: Implementation here must contain only Win32 specific code
40 //=== and must not be UNIX code.
41 //===----------------------------------------------------------------------===//
43 static std::vector<HMODULE> OpenedHandles;
46 typedef DWORD64 ModuleBaseType;
48 typedef ULONG ModuleBaseType;
52 // Use old callback if:
53 // - Not using Visual Studio
54 // - Visual Studio 2005 or earlier but only if we are not using the Windows SDK
55 // or Windows SDK version is older than 6.0
56 // Use new callback if:
57 // - Newer Visual Studio (comes with newer SDK).
58 // - Visual Studio 2005 with Windows SDK 6.0+
59 #if !defined(_MSC_VER) || _MSC_VER < 1500 && (!defined(VER_PRODUCTBUILD) || VER_PRODUCTBUILD < 6000)
60 static BOOL CALLBACK ELM_Callback(PSTR ModuleName,
61 ModuleBaseType ModuleBase,
65 static BOOL CALLBACK ELM_Callback(PCSTR ModuleName,
66 ModuleBaseType ModuleBase,
71 llvm::sys::SmartScopedWriter<true> Writer(&SymbolsLock);
72 // Ignore VC++ runtimes prior to 7.1. Somehow some of them get loaded
74 if (stricmp(ModuleName, "msvci70") != 0 &&
75 stricmp(ModuleName, "msvcirt") != 0 &&
76 stricmp(ModuleName, "msvcp50") != 0 &&
77 stricmp(ModuleName, "msvcp60") != 0 &&
78 stricmp(ModuleName, "msvcp70") != 0 &&
79 stricmp(ModuleName, "msvcr70") != 0 &&
81 // Mingw32 uses msvcrt.dll by default. Don't ignore it.
82 // Otherwise, user should be aware, what he's doing :)
83 stricmp(ModuleName, "msvcrt") != 0 &&
85 stricmp(ModuleName, "msvcrt20") != 0 &&
86 stricmp(ModuleName, "msvcrt40") != 0) {
87 OpenedHandles.push_back((HMODULE)ModuleBase);
93 DynamicLibrary::DynamicLibrary() : handle(0) {
94 SmartScopedWriter<true> Writer(&SymbolsLock);
95 handle = GetModuleHandle(NULL);
96 OpenedHandles.push_back((HMODULE)handle);
99 DynamicLibrary::~DynamicLibrary() {
100 llvm::sys::SmartScopedWriter<true> Writer(&SymbolsLock);
104 // GetModuleHandle() does not increment the ref count, so we must not free
105 // the handle to the executable.
106 if (handle != GetModuleHandle(NULL))
107 FreeLibrary((HMODULE)handle);
110 for (std::vector<HMODULE>::iterator I = OpenedHandles.begin(),
111 E = OpenedHandles.end(); I != E; ++I) {
113 // Note: don't use the swap/pop_back trick here. Order is important.
114 OpenedHandles.erase(I);
119 bool DynamicLibrary::LoadLibraryPermanently(const char *filename,
120 std::string *ErrMsg) {
122 llvm::sys::SmartScopedWriter<true> Writer(&SymbolsLock);
123 HMODULE a_handle = LoadLibrary(filename);
126 return MakeErrMsg(ErrMsg, std::string(filename) + ": Can't open : ");
128 OpenedHandles.push_back(a_handle);
130 // When no file is specified, enumerate all DLLs and EXEs in the
132 EnumerateLoadedModules(GetCurrentProcess(), ELM_Callback, 0);
135 // Because we don't remember the handle, we will never free it; hence,
136 // it is loaded permanently.
140 // Stack probing routines are in the support library (e.g. libgcc), but we don't
141 // have dynamic linking on windows. Provide a hook.
142 #if defined(__MINGW32__) || defined (_MSC_VER)
143 #define EXPLICIT_SYMBOL(SYM) \
144 if (!strcmp(symbolName, #SYM)) return (void*)&SYM
145 #define EXPLICIT_SYMBOL2(SYMFROM, SYMTO) \
146 if (!strcmp(symbolName, #SYMFROM)) return (void*)&SYMTO
147 #define EXPLICIT_SYMBOL_DEF(SYM) \
148 extern "C" { extern void *SYM; }
150 #if defined(__MINGW32__)
151 EXPLICIT_SYMBOL_DEF(_alloca);
152 EXPLICIT_SYMBOL_DEF(__main);
153 EXPLICIT_SYMBOL_DEF(__ashldi3);
154 EXPLICIT_SYMBOL_DEF(__ashrdi3);
155 EXPLICIT_SYMBOL_DEF(__cmpdi2);
156 EXPLICIT_SYMBOL_DEF(__divdi3);
157 EXPLICIT_SYMBOL_DEF(__fixdfdi);
158 EXPLICIT_SYMBOL_DEF(__fixsfdi);
159 EXPLICIT_SYMBOL_DEF(__fixunsdfdi);
160 EXPLICIT_SYMBOL_DEF(__fixunssfdi);
161 EXPLICIT_SYMBOL_DEF(__floatdidf);
162 EXPLICIT_SYMBOL_DEF(__floatdisf);
163 EXPLICIT_SYMBOL_DEF(__lshrdi3);
164 EXPLICIT_SYMBOL_DEF(__moddi3);
165 EXPLICIT_SYMBOL_DEF(__udivdi3);
166 EXPLICIT_SYMBOL_DEF(__umoddi3);
167 #elif defined(_MSC_VER)
168 EXPLICIT_SYMBOL_DEF(_alloca_probe);
172 void* DynamicLibrary::SearchForAddressOfSymbol(const char* symbolName) {
173 // First check symbols added via AddSymbol().
174 SymbolsLock.reader_acquire();
175 std::map<std::string, void *>::iterator I = symbols.find(symbolName);
176 std::map<std::string, void *>::iterator E = symbols.end();
177 SymbolsLock.reader_release();
181 // Now search the libraries.
182 SymbolsLock.writer_acquire();
183 for (std::vector<HMODULE>::iterator I = OpenedHandles.begin(),
184 E = OpenedHandles.end(); I != E; ++I) {
185 FARPROC ptr = GetProcAddress((HMODULE)*I, symbolName);
187 SymbolsLock.writer_release();
191 SymbolsLock.writer_release();
193 #if defined(__MINGW32__)
195 EXPLICIT_SYMBOL(_alloca);
196 EXPLICIT_SYMBOL(__main);
197 EXPLICIT_SYMBOL(__ashldi3);
198 EXPLICIT_SYMBOL(__ashrdi3);
199 EXPLICIT_SYMBOL(__cmpdi2);
200 EXPLICIT_SYMBOL(__divdi3);
201 EXPLICIT_SYMBOL(__fixdfdi);
202 EXPLICIT_SYMBOL(__fixsfdi);
203 EXPLICIT_SYMBOL(__fixunsdfdi);
204 EXPLICIT_SYMBOL(__fixunssfdi);
205 EXPLICIT_SYMBOL(__floatdidf);
206 EXPLICIT_SYMBOL(__floatdisf);
207 EXPLICIT_SYMBOL(__lshrdi3);
208 EXPLICIT_SYMBOL(__moddi3);
209 EXPLICIT_SYMBOL(__udivdi3);
210 EXPLICIT_SYMBOL(__umoddi3);
212 EXPLICIT_SYMBOL2(alloca, _alloca);
213 #undef EXPLICIT_SYMBOL
214 #undef EXPLICIT_SYMBOL2
215 #undef EXPLICIT_SYMBOL_DEF
217 #elif defined(_MSC_VER)
219 EXPLICIT_SYMBOL2(alloca, _alloca_probe);
220 EXPLICIT_SYMBOL2(_alloca, _alloca_probe);
221 #undef EXPLICIT_SYMBOL
222 #undef EXPLICIT_SYMBOL2
223 #undef EXPLICIT_SYMBOL_DEF