/* * Copyright (C) 2013-2015 Apple Inc. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include "config.h" #include "InitializeLLVMPOSIX.h" #if HAVE(LLVM) #include "LLVMAPI.h" #include "Options.h" #include <dlfcn.h> #include <wtf/DataLog.h> namespace JSC { LLVMInitializerFunction getLLVMInitializerFunctionPOSIX(const char* libraryName, bool verbose) { int flags = RTLD_NOW; #if OS(LINUX) // We need this to cause our overrides (like __cxa_atexit) to take precedent over the __cxa_atexit that is already // globally exported. Those overrides are necessary to prevent crashes (our __cxa_atexit turns off LLVM's exit-time // destruction, which causes exit-time crashes if the concurrent JIT is still running) and to make LLVM assertion // failures funnel through WebKit's mechanisms. This flag induces behavior that is the default on Darwin. Other OSes // may need their own flags in place of this. flags |= RTLD_DEEPBIND; #endif void* library = dlopen(libraryName, flags); if (!library) { if (verbose) dataLog("Failed to load LLVM library at ", libraryName, ": ", dlerror(), "\n"); return nullptr; } const char* symbolName = "initializeAndGetJSCLLVMAPI"; LLVMInitializerFunction initializer = bitwise_cast<LLVMInitializerFunction>( dlsym(library, symbolName)); if (!initializer) { if (verbose) dataLog("Failed to find ", symbolName, " in ", libraryName, ": ", dlerror()); return nullptr; } return initializer; } } // namespace JSC #endif // HAVE(LLVM)