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 bool DynamicLibrary::LoadLibraryPermanently(const char *filename,
92 std::string *ErrMsg) {
94 HMODULE a_handle = LoadLibrary(filename);
97 return MakeErrMsg(ErrMsg, std::string(filename) + ": Can't open : ");
99 OpenedHandles.push_back(a_handle);
101 // When no file is specified, enumerate all DLLs and EXEs in the
103 EnumerateLoadedModules(GetCurrentProcess(), ELM_Callback, 0);
106 // Because we don't remember the handle, we will never free it; hence,
107 // it is loaded permanently.
111 // Stack probing routines are in the support library (e.g. libgcc), but we don't
112 // have dynamic linking on windows. Provide a hook.
113 #define EXPLICIT_SYMBOL(SYM) \
114 extern "C" { extern void *SYM; }
115 #define EXPLICIT_SYMBOL2(SYMFROM, SYMTO) EXPLICIT_SYMBOL(SYMTO)
117 #include "explicit_symbols.inc"
119 #undef EXPLICIT_SYMBOL
120 #undef EXPLICIT_SYMBOL2
122 void* DynamicLibrary::SearchForAddressOfSymbol(const char* symbolName) {
123 // First check symbols added via AddSymbol().
124 if (ExplicitSymbols) {
125 std::map<std::string, void *>::iterator I =
126 ExplicitSymbols->find(symbolName);
127 std::map<std::string, void *>::iterator E = ExplicitSymbols->end();
132 // Now search the libraries.
133 for (std::vector<HMODULE>::iterator I = OpenedHandles.begin(),
134 E = OpenedHandles.end(); I != E; ++I) {
135 FARPROC ptr = GetProcAddress((HMODULE)*I, symbolName);
141 #define EXPLICIT_SYMBOL(SYM) \
142 if (!strcmp(symbolName, #SYM)) return (void*)&SYM;
143 #define EXPLICIT_SYMBOL2(SYMFROM, SYMTO) \
144 if (!strcmp(symbolName, #SYMFROM)) return (void*)&SYMTO;
147 #include "explicit_symbols.inc"
150 #undef EXPLICIT_SYMBOL
151 #undef EXPLICIT_SYMBOL2