//===-- DynamicLibrary.cpp - Runtime link/load libraries --------*- C++ -*-===//
-//
+//
// The LLVM Compiler Infrastructure
//
-// This file was developed by Reid Spencer and is distributed under the
+// This file was developed by Reid Spencer and is distributed under the
// University of Illinois Open Source License. See LICENSE.TXT for details.
-//
+//
//===----------------------------------------------------------------------===//
//
// This header file implements the operating system DynamicLibrary concept.
#include "llvm/System/DynamicLibrary.h"
#include "llvm/Config/config.h"
+#include <map>
+
+// Collection of symbol name/value pairs to be searched prior to any libraries.
+static std::map<std::string, void *> g_symbols;
+
+void llvm::sys::DynamicLibrary::AddSymbol(const char* symbolName, void *symbolValue) {
+ g_symbols[symbolName] = symbolValue;
+}
// It is not possible to use ltdl.c on VC++ builds as the terms of its LGPL
// license and special exception would cause all of LLVM to be placed under
//===----------------------------------------------------------------------===//
//=== WARNING: Implementation here must contain only TRULY operating system
-//=== independent code.
+//=== independent code.
//===----------------------------------------------------------------------===//
static bool did_initialize_ltdl = false;
if (a_handle == 0)
throw std::string("Can't open program as dynamic library");
-
+
handle = a_handle;
OpenedHandles.push_back(a_handle);
}
void* DynamicLibrary::SearchForAddressOfSymbol(const char* symbolName) {
check_ltdl_initialization();
+
+ // 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<lt_dlhandle>::iterator I = OpenedHandles.begin(),
E = OpenedHandles.end(); I != E; ++I) {
lt_ptr ptr = lt_dlsym(*I, symbolName);