1 files changed, 73 insertions, 0 deletions
diff --git a/Source/JavaScriptCore/llvm/InitializeLLVMPOSIX.cpp b/Source/JavaScriptCore/llvm/InitializeLLVMPOSIX.cpp
new file mode 100644
index 000000000..8c9c24844
--- /dev/null
+++ b/Source/JavaScriptCore/llvm/InitializeLLVMPOSIX.cpp
@@ -0,0 +1,73 @@
+/*
+ * 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)
+