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71 lines
2.3 KiB
C++
71 lines
2.3 KiB
C++
//===-- DynamicLinker.cpp - Implement DynamicLinker interface -------------===//
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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 the LLVM research group and is distributed under
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// the 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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// Lightweight interface to dynamic library linking and loading, and dynamic
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// symbol lookup functionality, in whatever form the operating system
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// provides it.
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//
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// Possible future extensions include support for the HPUX shl_load()
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// interface, the Mac OS X NSLinkModule() interface, and the Windows
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// LoadLibrary() interface.
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//
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// Note that we assume that if dlopen() is available, then dlsym() is too.
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//
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//===----------------------------------------------------------------------===//
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#include "Support/DynamicLinker.h"
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#include "Config/dlfcn.h"
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#include "Config/windows.h"
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#include <cassert>
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using namespace llvm;
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bool llvm::LinkDynamicObject (const char *filename, std::string *ErrorMessage) {
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#if defined (HAVE_DLOPEN)
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if (dlopen (filename, RTLD_NOW | RTLD_GLOBAL) == 0) {
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if (ErrorMessage) *ErrorMessage = dlerror ();
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return true;
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}
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return false;
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#elif defined(HAVE_WINDOWS_H)
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if (LoadLibrary(filename))
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return false;
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if (ErrorMessage) {
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char Buffer[100];
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// FIXME: This should use FormatMessage
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sprintf(Buffer, "Windows error code %d\n", GetLastError());
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*ErrorMessage = Buffer;
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}
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return true;
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#else
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assert (0 && "Dynamic object linking not implemented for this platform");
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#endif
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}
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void *llvm::GetAddressOfSymbol (const char *symbolName) {
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#if defined (HAVE_DLOPEN)
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# ifdef RTLD_DEFAULT
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return dlsym (RTLD_DEFAULT, symbolName);
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# else
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static void* CurHandle = dlopen(0, RTLD_LAZY);
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return dlsym(CurHandle, symbolName);
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# endif
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#elif defined(HAVE_WINDOWS_H)
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static HMODULE ModHandle = NULL;
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if (ModHandle == 0) ModHandle = GetModuleHandle(NULL);
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return (void*)GetProcAddress(ModHandle, symbolName);
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#else
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assert (0 && "Dynamic symbol lookup not implemented for this platform");
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#endif
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}
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// soft, cushiony C++ interface.
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void *llvm::GetAddressOfSymbol(const std::string &symbolName) {
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return GetAddressOfSymbol(symbolName.c_str());
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}
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