Mercurial > hg > truffle
view graal/com.oracle.graal.ffi.amd64/src/com/oracle/graal/ffi/amd64/AMD64NativeFunctionInterface.java @ 13869:e2db5c351ef3
GNFI: cache lookup handles
author | Matthias Grimmer <grimmer@ssw.jku.at> |
---|---|
date | Wed, 05 Feb 2014 09:26:36 +0100 |
parents | ed3a1471e133 |
children | d04be74665fb |
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/* * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package com.oracle.graal.ffi.amd64; import java.lang.reflect.*; import sun.misc.*; import com.oracle.graal.api.code.*; import com.oracle.graal.compiler.target.*; import com.oracle.graal.hotspot.meta.*; public class AMD64NativeFunctionInterface implements NativeFunctionInterface { private static final Class LOOKUP_FUNCTION_RETURNTYPE = long.class; private static final Class[] LOOKUP_FUNCTION_SIGNATURE = new Class[]{long.class, long.class}; private static final Unsafe unsafe = getUnsafe(); private static final int STD_BUFFER_SIZE = 1024; protected final HotSpotProviders providers; protected final Backend backend; protected final AMD64NativeLibraryHandle rtldDefault; protected final AMD64NativeFunctionPointer libraryLoadFunctionPointer; protected final AMD64NativeFunctionPointer functionLookupFunctionPointer; private AMD64NativeFunctionHandle libraryLookupFunctionHandle; private AMD64NativeFunctionHandle dllLookupFunctionHandle; public AMD64NativeFunctionInterface(HotSpotProviders providers, Backend backend, AMD64NativeFunctionPointer libraryLoadFunctionPointer, AMD64NativeFunctionPointer functionLookUpFunctionPointer, AMD64NativeLibraryHandle rtldDefault) { this.rtldDefault = rtldDefault; this.providers = providers; this.backend = backend; this.libraryLoadFunctionPointer = libraryLoadFunctionPointer; this.functionLookupFunctionPointer = functionLookUpFunctionPointer; } @Override public AMD64NativeLibraryHandle getLibraryHandle(String libPath) { if (libraryLookupFunctionHandle == null) { libraryLookupFunctionHandle = new AMD64NativeFunctionHandle(providers, backend, libraryLoadFunctionPointer, long.class, new Class[]{long.class, long.class, int.class}); } long allocatedMemory = -1; try { allocatedMemory = unsafe.allocateMemory(STD_BUFFER_SIZE); } catch (OutOfMemoryError e) { throw new AssertionError(); } Object[] args = new Object[]{copyStringToMemory(libPath), allocatedMemory, STD_BUFFER_SIZE}; long libraryHandle = (long) libraryLookupFunctionHandle.call(args); unsafe.freeMemory(allocatedMemory); return new AMD64NativeLibraryHandle(libraryHandle); } @Override public AMD64NativeFunctionHandle getFunctionHandle(NativeLibraryHandle libraryHandle, String functionName, Class returnType, Class[] argumentTypes) { AMD64NativeFunctionPointer functionPointer = lookupFunctionPointer(functionName, libraryHandle); if (!functionPointer.isValid()) { throw new IllegalStateException(functionName + " not found!"); } return getFunctionHandle(functionPointer, returnType, argumentTypes); } @Override public AMD64NativeFunctionHandle getFunctionHandle(NativeLibraryHandle[] libraryHandles, String functionName, Class returnType, Class[] argumentTypes) { AMD64NativeFunctionPointer functionPointer = null; for (NativeLibraryHandle libraryHandle : libraryHandles) { functionPointer = lookupFunctionPointer(functionName, libraryHandle); if (functionPointer.isValid()) { return new AMD64NativeFunctionHandle(providers, backend, functionPointer, returnType, argumentTypes); } } return getFunctionHandle(functionName, returnType, argumentTypes); } @Override public AMD64NativeFunctionHandle getFunctionHandle(String functionName, Class returnType, Class[] argumentTypes) { if (rtldDefault.asRawValue() == AMD64NativeLibraryHandle.INVALID_HANDLE) { throw new AssertionError("No library provided or RTLD_DEFAULT not supported!"); } return getFunctionHandle(rtldDefault, functionName, returnType, argumentTypes); } private AMD64NativeFunctionPointer lookupFunctionPointer(String functionName, NativeLibraryHandle handle) { if (!functionLookupFunctionPointer.isValid()) { throw new IllegalStateException("no dlsym function pointer"); } if (dllLookupFunctionHandle == null) { dllLookupFunctionHandle = new AMD64NativeFunctionHandle(providers, backend, functionLookupFunctionPointer, LOOKUP_FUNCTION_RETURNTYPE, LOOKUP_FUNCTION_SIGNATURE); } long allocatedMemory = copyStringToMemory(functionName); Object[] args = new Object[]{handle, allocatedMemory}; long functionPointer = (long) dllLookupFunctionHandle.call(args); unsafe.freeMemory(allocatedMemory); return new AMD64NativeFunctionPointer(functionPointer, functionName); } private static long copyStringToMemory(String str) { int size = str.length(); long ptr = unsafe.allocateMemory(size + 1); for (int i = 0; i < size; i++) { unsafe.putByte(ptr + i, (byte) str.charAt(i)); } unsafe.putByte(ptr + size, (byte) '\0'); return ptr; } private static Unsafe getUnsafe() { try { return Unsafe.getUnsafe(); } catch (SecurityException e) { } try { Field theUnsafeInstance = Unsafe.class.getDeclaredField("theUnsafe"); theUnsafeInstance.setAccessible(true); return (Unsafe) theUnsafeInstance.get(Unsafe.class); } catch (IllegalArgumentException | SecurityException | NoSuchFieldException | IllegalAccessException e) { throw new RuntimeException("exception while trying to get Unsafe.theUnsafe via reflection:", e); } } @Override public AMD64NativeFunctionHandle getFunctionHandle(NativeFunctionPointer functionPointer, Class returnType, Class[] argumentTypes) { if (functionPointer instanceof AMD64NativeFunctionPointer) { if (!((AMD64NativeFunctionPointer) functionPointer).isValid()) { throw new IllegalStateException("Function Symbol not found"); } } else { throw new IllegalStateException("AMD64 function pointer required!"); } return new AMD64NativeFunctionHandle(providers, backend, (AMD64NativeFunctionPointer) functionPointer, returnType, argumentTypes); } @Override public AMD64NativeFunctionPointer getFunctionPointer(NativeLibraryHandle[] libraryHandles, String functionName) { for (NativeLibraryHandle libraryHandle : libraryHandles) { AMD64NativeFunctionPointer functionPointer = lookupFunctionPointer(functionName, libraryHandle); if (functionPointer.isValid()) { return functionPointer; } } throw new LinkageError("Function not found: " + functionName); } @Override public NativeFunctionPointer getNativeFunctionPointerFromRawValue(long rawValue) { return new AMD64NativeFunctionPointer(rawValue, null); } }