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;
46 static BOOL CALLBACK ELM_Callback(WIN32_ELMCB_PCSTR ModuleName,
51 // Ignore VC++ runtimes prior to 7.1. Somehow some of them get loaded
53 if (stricmp(ModuleName, "msvci70") != 0 &&
54 stricmp(ModuleName, "msvcirt") != 0 &&
55 stricmp(ModuleName, "msvcp50") != 0 &&
56 stricmp(ModuleName, "msvcp60") != 0 &&
57 stricmp(ModuleName, "msvcp70") != 0 &&
58 stricmp(ModuleName, "msvcr70") != 0 &&
60 // Mingw32 uses msvcrt.dll by default. Don't ignore it.
61 // Otherwise, user should be aware, what he's doing :)
62 stricmp(ModuleName, "msvcrt") != 0 &&
64 stricmp(ModuleName, "msvcrt20") != 0 &&
65 stricmp(ModuleName, "msvcrt40") != 0) {
66 OpenedHandles.push_back((HMODULE)ModuleBase);
72 bool DynamicLibrary::LoadLibraryPermanently(const char *filename,
73 std::string *ErrMsg) {
75 HMODULE a_handle = LoadLibrary(filename);
78 return MakeErrMsg(ErrMsg, std::string(filename) + ": Can't open : ");
80 OpenedHandles.push_back(a_handle);
82 // When no file is specified, enumerate all DLLs and EXEs in the
84 EnumerateLoadedModules(GetCurrentProcess(), ELM_Callback, 0);
87 // Because we don't remember the handle, we will never free it; hence,
88 // it is loaded permanently.
92 // Stack probing routines are in the support library (e.g. libgcc), but we don't
93 // have dynamic linking on windows. Provide a hook.
94 #define EXPLICIT_SYMBOL(SYM) \
95 extern "C" { extern void *SYM; }
96 #define EXPLICIT_SYMBOL2(SYMFROM, SYMTO) EXPLICIT_SYMBOL(SYMTO)
98 #include "explicit_symbols.inc"
100 #undef EXPLICIT_SYMBOL
101 #undef EXPLICIT_SYMBOL2
103 void* DynamicLibrary::SearchForAddressOfSymbol(const char* symbolName) {
104 // First check symbols added via AddSymbol().
105 if (ExplicitSymbols) {
106 std::map<std::string, void *>::iterator I =
107 ExplicitSymbols->find(symbolName);
108 std::map<std::string, void *>::iterator E = ExplicitSymbols->end();
113 // Now search the libraries.
114 for (std::vector<HMODULE>::iterator I = OpenedHandles.begin(),
115 E = OpenedHandles.end(); I != E; ++I) {
116 FARPROC ptr = GetProcAddress((HMODULE)*I, symbolName);
118 return (void *)(intptr_t)ptr;
122 #define EXPLICIT_SYMBOL(SYM) \
123 if (!strcmp(symbolName, #SYM)) return (void*)&SYM;
124 #define EXPLICIT_SYMBOL2(SYMFROM, SYMTO) \
125 if (!strcmp(symbolName, #SYMFROM)) return (void*)&SYMTO;
128 #include "explicit_symbols.inc"
131 #undef EXPLICIT_SYMBOL
132 #undef EXPLICIT_SYMBOL2