JavaScriptCore-7600.1.4.9.tar.gz

[apple/javascriptcore.git] / llvm / library / LLVMExports.cpp

diff --git a/llvm/library/LLVMExports.cpp b/llvm/library/LLVMExports.cpp
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+/*
+ * Copyright (C) 2013, 2014 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_llvm.h"
+
+#if HAVE(LLVM)
+
+#include "LLVMAPI.h"
+#include "LLVMTrapCallback.h"
+
+// Include some extra LLVM C++ headers. This is the only place where including LLVM C++
+// headers is OK, since this module lives inside of the LLVM dylib we make and so can see
+// otherwise private things. But to include those headers, we need to do some weird things
+// first. Anyway, we should keep LLVM C++ includes to a minimum if possible.
+
+#define __STDC_LIMIT_MACROS
+#define __STDC_CONSTANT_MACROS
+
+#if COMPILER(CLANG)
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wmissing-noreturn"
+#pragma clang diagnostic ignored "-Wunused-parameter"
+#endif // COMPILER(CLANG)
+
+#include <llvm/Support/CommandLine.h>
+
+#if COMPILER(CLANG)
+#pragma clang diagnostic pop
+#endif // COMPILER(CLANG)
+
+#undef __STDC_LIMIT_MACROS
+#undef __STDC_CONSTANT_MACROS
+
+extern "C" WTF_EXPORT_PRIVATE JSC::LLVMAPI* initializeAndGetJSCLLVMAPI(void (*)(const char*, ...));
+
+static void llvmCrash(const char* reason)
+{
+    g_llvmTrapCallback("LLVM fatal error: %s", reason);
+}
+
+extern "C" JSC::LLVMAPI* initializeAndGetJSCLLVMAPI(void (*callback)(const char*, ...))
+{
+    g_llvmTrapCallback = callback;
+    
+    LLVMInstallFatalErrorHandler(llvmCrash);
+
+    if (!LLVMStartMultithreaded())
+        callback("Could not start LLVM multithreading");
+    
+    LLVMLinkInMCJIT();
+    
+    // You think you want to call LLVMInitializeNativeTarget()? Think again. This presumes that
+    // LLVM was ./configured correctly, which won't be the case in cross-compilation situations.
+    
+#if CPU(X86_64)
+    LLVMInitializeX86TargetInfo();
+    LLVMInitializeX86Target();
+    LLVMInitializeX86TargetMC();
+    LLVMInitializeX86AsmPrinter();
+    LLVMInitializeX86Disassembler();
+#elif CPU(ARM64)
+    LLVMInitializeARM64TargetInfo();
+    LLVMInitializeARM64Target();
+    LLVMInitializeARM64TargetMC();
+    LLVMInitializeARM64AsmPrinter();
+    LLVMInitializeARM64Disassembler();
+#else
+    UNREACHABLE_FOR_PLATFORM();
+#endif
+    
+    const char* args[] = {
+        "llvmForJSC.dylib",
+        "-enable-stackmap-liveness=true",
+        "-enable-patchpoint-liveness=true"
+    };
+    llvm::cl::ParseCommandLineOptions(sizeof(args) / sizeof(const char*), args);
+    
+    JSC::LLVMAPI* result = new JSC::LLVMAPI;
+    
+#define LLVM_API_FUNCTION_ASSIGNMENT(returnType, name, signature) \
+    result->name = LLVM##name;
+    FOR_EACH_LLVM_API_FUNCTION(LLVM_API_FUNCTION_ASSIGNMENT);
+#undef LLVM_API_FUNCTION_ASSIGNMENT
+    
+    return result;
+}
+
+#else
+
+// Create a dummy initializeAndGetJSCLLVMAPI to placate the build system.
+extern "C" WTF_EXPORT_PRIVATE void initializeAndGetJSCLLVMAPI();
+extern "C" void initializeAndGetJSCLLVMAPI() { }
+
+#endif // HAVE(LLVM)