Mercurial > hg > truffle
view src/share/vm/classfile/altHashing.hpp @ 6972:bd7a7ce2e264
6830717: replay of compilations would help with debugging
Summary: When java process crashed in compiler thread, repeat the compilation process will help finding root cause. This is done with using SA dump application class data and replay data from core dump, then use debug version of jvm to recompile the problematic java method.
Reviewed-by: kvn, twisti, sspitsyn
Contributed-by: yumin.qi@oracle.com
author | minqi |
---|---|
date | Mon, 12 Nov 2012 14:03:53 -0800 |
parents | e9140bf80b4a |
children | cd6b3f1a94ff |
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/* * Copyright (c) 2012, 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. * */ #ifndef SHARE_VM_CLASSFILE_ALTHASHING_HPP #define SHARE_VM_CLASSFILE_ALTHASHING_HPP #include "prims/jni.h" #include "classfile/symbolTable.hpp" /** * Hashing utilities. * * Implementation of Murmur3 hashing. * This code was translated from src/share/classes/sun/misc/Hashing.java * code in the JDK. */ class AltHashing : AllStatic { // utility function copied from java/lang/Integer static jint Integer_rotateLeft(jint i, int distance) { return (i << distance) | (((juint)i) >> (32-distance)); } static jint murmur3_32(const int* data, int len); static jint murmur3_32(jint seed, const int* data, int len); #ifndef PRODUCT // Hashing functions used for internal testing static jint murmur3_32(const jbyte* data, int len); static jint murmur3_32(const jchar* data, int len); static void testMurmur3_32_ByteArray(); static void testEquivalentHashes(); #endif // PRODUCT public: static jint compute_seed(); static jint murmur3_32(jint seed, const jbyte* data, int len); static jint murmur3_32(jint seed, const jchar* data, int len); NOT_PRODUCT(static void test_alt_hash();) }; #endif // SHARE_VM_CLASSFILE_ALTHASHING_HPP