| //===- Win32/DynamicLibrary.cpp - Win32 DL Implementation -------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file was developed by Jeff Cohen and is distributed under the |
| // University of Illinois Open Source License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file provides the Win32 specific implementation of DynamicLibrary. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "Win32.h" |
| |
| #ifdef __MINGW32__ |
| #include <imagehlp.h> |
| #else |
| #include <dbghelp.h> |
| #endif |
| |
| #ifdef __MINGW32__ |
| #if (HAVE_LIBIMAGEHLP != 1) |
| #error "libimagehlp.a should be present" |
| #endif |
| #else |
| #pragma comment(lib, "dbghelp.lib") |
| #endif |
| |
| namespace llvm { |
| using namespace sys; |
| |
| //===----------------------------------------------------------------------===// |
| //=== WARNING: Implementation here must contain only Win32 specific code |
| //=== and must not be UNIX code. |
| //===----------------------------------------------------------------------===// |
| |
| static std::vector<HMODULE> OpenedHandles; |
| |
| #ifdef _WIN64 |
| typedef DWORD64 ModuleBaseType; |
| #else |
| typedef ULONG ModuleBaseType; |
| #endif |
| |
| extern "C" { |
| static BOOL CALLBACK ELM_Callback(PSTR ModuleName, |
| ModuleBaseType ModuleBase, |
| ULONG ModuleSize, |
| PVOID UserContext) |
| { |
| // Ignore VC++ runtimes prior to 7.1. Somehow some of them get loaded |
| // into the process. |
| if (stricmp(ModuleName, "msvci70") != 0 && |
| stricmp(ModuleName, "msvcirt") != 0 && |
| stricmp(ModuleName, "msvcp50") != 0 && |
| stricmp(ModuleName, "msvcp60") != 0 && |
| stricmp(ModuleName, "msvcp70") != 0 && |
| stricmp(ModuleName, "msvcr70") != 0 && |
| #ifndef __MINGW32__ |
| // Mingw32 uses msvcrt.dll by default. Don't ignore it. |
| // Otherwise, user should be aware, what he's doing :) |
| stricmp(ModuleName, "msvcrt") != 0 && |
| #endif |
| stricmp(ModuleName, "msvcrt20") != 0 && |
| stricmp(ModuleName, "msvcrt40") != 0) { |
| OpenedHandles.push_back((HMODULE)ModuleBase); |
| } |
| return TRUE; |
| } |
| } |
| |
| DynamicLibrary::DynamicLibrary() : handle(0) { |
| handle = GetModuleHandle(NULL); |
| OpenedHandles.push_back((HMODULE)handle); |
| } |
| |
| DynamicLibrary::~DynamicLibrary() { |
| if (handle == 0) |
| return; |
| |
| // GetModuleHandle() does not increment the ref count, so we must not free |
| // the handle to the executable. |
| if (handle != GetModuleHandle(NULL)) |
| FreeLibrary((HMODULE)handle); |
| handle = 0; |
| |
| for (std::vector<HMODULE>::iterator I = OpenedHandles.begin(), |
| E = OpenedHandles.end(); I != E; ++I) { |
| if (*I == handle) { |
| // Note: don't use the swap/pop_back trick here. Order is important. |
| OpenedHandles.erase(I); |
| } |
| } |
| } |
| |
| // Stack probing routines are in the support library (e.g. libgcc), but we don't |
| // have dynamic linking on windows. Provide a hook. |
| #if defined(__MINGW32__) || defined (_MSC_VER) |
| #define EXPLICIT_SYMBOL(SYM) \ |
| if (!strcmp(symbolName, #SYM)) return (void*)&SYM |
| #define EXPLICIT_SYMBOL2(SYMFROM, SYMTO) \ |
| if (!strcmp(symbolName, #SYMFROM)) return (void*)&SYMTO |
| #define EXPLICIT_SYMBOL_DEF(SYM) \ |
| extern "C" { extern void *SYM; } |
| |
| #if defined(__MINGW32__) |
| EXPLICIT_SYMBOL_DEF(_alloca); |
| #elif defined(_MSC_VER) |
| EXPLICIT_SYMBOL_DEF(_alloca_probe); |
| #endif |
| #endif |
| |
| bool DynamicLibrary::LoadLibraryPermanently(const char *filename, |
| std::string *ErrMsg) { |
| if (filename) { |
| HMODULE a_handle = LoadLibrary(filename); |
| |
| if (a_handle == 0) |
| return MakeErrMsg(ErrMsg, std::string(filename) + ": Can't open : "); |
| |
| OpenedHandles.push_back(a_handle); |
| } else { |
| // When no file is specified, enumerate all DLLs and EXEs in the |
| // process. |
| EnumerateLoadedModules(GetCurrentProcess(), ELM_Callback, 0); |
| } |
| |
| // Because we don't remember the handle, we will never free it; hence, |
| // it is loaded permanently. |
| return false; |
| } |
| |
| void* DynamicLibrary::SearchForAddressOfSymbol(const char* symbolName) { |
| // First check symbols added via AddSymbol(). |
| std::map<std::string, void *>::iterator I = g_symbols.find(symbolName); |
| if (I != g_symbols.end()) |
| return I->second; |
| |
| // Now search the libraries. |
| for (std::vector<HMODULE>::iterator I = OpenedHandles.begin(), |
| E = OpenedHandles.end(); I != E; ++I) { |
| FARPROC ptr = GetProcAddress((HMODULE)*I, symbolName); |
| if (ptr) |
| return (void *) ptr; |
| } |
| |
| #if defined(__MINGW32__) |
| { |
| EXPLICIT_SYMBOL(_alloca); |
| EXPLICIT_SYMBOL2(alloca, _alloca); |
| #undef EXPLICIT_SYMBOL |
| #undef EXPLICIT_SYMBOL2 |
| #undef EXPLICIT_SYMBOL_DEF |
| } |
| #elif defined(_MSC_VER) |
| { |
| EXPLICIT_SYMBOL2(alloca, _alloca_probe); |
| EXPLICIT_SYMBOL2(_alloca, _alloca_probe); |
| #undef EXPLICIT_SYMBOL |
| #undef EXPLICIT_SYMBOL2 |
| #undef EXPLICIT_SYMBOL_DEF |
| } |
| #endif |
| |
| return 0; |
| } |
| |
| void *DynamicLibrary::GetAddressOfSymbol(const char *symbolName) { |
| assert(handle != 0 && "Invalid DynamicLibrary handle"); |
| return (void *) GetProcAddress((HMODULE)handle, symbolName); |
| } |
| |
| } |
| |