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141 lines
4.1 KiB
C++
141 lines
4.1 KiB
C++
//===- Win32/DynamicLibrary.cpp - Win32 DL Implementation -------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by Jeff Cohen and is distributed under the
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// University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file provides the Win32 specific implementation of DynamicLibrary.
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//
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//===----------------------------------------------------------------------===//
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#include "Win32.h"
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#ifdef __MINGW32__
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#include <imagehlp.h>
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#else
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#include <dbghelp.h>
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#endif
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#ifdef __MINGW32__
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#if (HAVE_LIBIMAGEHLP != 1)
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#error "libimagehlp.a should be present"
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#endif
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#else
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#pragma comment(lib, "dbghelp.lib")
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#endif
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namespace llvm {
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using namespace sys;
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//===----------------------------------------------------------------------===//
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//=== WARNING: Implementation here must contain only Win32 specific code
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//=== and must not be UNIX code.
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//===----------------------------------------------------------------------===//
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static std::vector<HMODULE> OpenedHandles;
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extern "C" {
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static BOOL CALLBACK ELM_Callback(PSTR ModuleName,
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ULONG ModuleBase,
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ULONG ModuleSize,
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PVOID UserContext)
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{
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// Ignore VC++ runtimes prior to 7.1. Somehow some of them get loaded
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// into the process.
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if (stricmp(ModuleName, "msvci70") != 0 &&
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stricmp(ModuleName, "msvcirt") != 0 &&
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stricmp(ModuleName, "msvcp50") != 0 &&
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stricmp(ModuleName, "msvcp60") != 0 &&
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stricmp(ModuleName, "msvcp70") != 0 &&
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stricmp(ModuleName, "msvcr70") != 0 &&
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stricmp(ModuleName, "msvcrt") != 0 &&
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stricmp(ModuleName, "msvcrt20") != 0 &&
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stricmp(ModuleName, "msvcrt40") != 0) {
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OpenedHandles.push_back((HMODULE)ModuleBase);
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}
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return TRUE;
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}
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}
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DynamicLibrary::DynamicLibrary() : handle(0) {
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handle = GetModuleHandle(NULL);
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OpenedHandles.push_back((HMODULE)handle);
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}
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DynamicLibrary::DynamicLibrary(const char*filename) : handle(0) {
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HMODULE a_handle = LoadLibrary(filename);
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if (a_handle == 0)
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ThrowError(std::string(filename) + ": Can't open : ");
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handle = a_handle;
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OpenedHandles.push_back(a_handle);
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}
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DynamicLibrary::~DynamicLibrary() {
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if (handle == 0)
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return;
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// GetModuleHandle() does not increment the ref count, so we must not free
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// the handle to the executable.
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if (handle != GetModuleHandle(NULL))
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FreeLibrary((HMODULE)handle);
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handle = 0;
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for (std::vector<HMODULE>::iterator I = OpenedHandles.begin(),
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E = OpenedHandles.end(); I != E; ++I) {
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if (*I == handle) {
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// Note: don't use the swap/pop_back trick here. Order is important.
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OpenedHandles.erase(I);
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}
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}
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}
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bool DynamicLibrary::LoadLibraryPermanently(const char *filename,
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std::string *ErrMsg) {
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if (filename) {
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HMODULE a_handle = LoadLibrary(filename);
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if (a_handle == 0)
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return GetError(std::string(filename) + ": Can't open : ", ErrMsg);
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OpenedHandles.push_back(a_handle);
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} else {
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// When no file is specified, enumerate all DLLs and EXEs in the
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// process.
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EnumerateLoadedModules(GetCurrentProcess(), ELM_Callback, 0);
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}
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// Because we don't remember the handle, we will never free it; hence,
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// it is loaded permanently.
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return false;
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}
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void* DynamicLibrary::SearchForAddressOfSymbol(const char* symbolName) {
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// First check symbols added via AddSymbol().
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std::map<std::string, void *>::iterator I = g_symbols.find(symbolName);
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if (I != g_symbols.end())
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return I->second;
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// Now search the libraries.
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for (std::vector<HMODULE>::iterator I = OpenedHandles.begin(),
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E = OpenedHandles.end(); I != E; ++I) {
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FARPROC ptr = GetProcAddress((HMODULE)*I, symbolName);
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if (ptr)
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return (void *) ptr;
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}
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return 0;
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}
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void *DynamicLibrary::GetAddressOfSymbol(const char *symbolName) {
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assert(handle != 0 && "Invalid DynamicLibrary handle");
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return (void *) GetProcAddress((HMODULE)handle, symbolName);
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}
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}
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