Mercurial > hg > graal-compiler
view src/share/vm/prims/methodComparator.hpp @ 17778:a48e16541e6b
8035857: Add tests to verify correctness of operations with BMI1 and LZCNT instructions
Reviewed-by: iveresov, kvn, iignatyev
Contributed-by: filipp.zhinkin@oracle.com
author | iignatyev |
---|---|
date | Sat, 22 Mar 2014 00:26:48 +0400 |
parents | da91efe96a93 |
children |
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/* * Copyright (c) 2000, 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_PRIMS_METHODCOMPARATOR_HPP #define SHARE_VM_PRIMS_METHODCOMPARATOR_HPP #include "interpreter/bytecodeStream.hpp" #include "oops/constantPool.hpp" #include "oops/method.hpp" class BciMap; // methodComparator provides an interface for determining if methods of // different versions of classes are equivalent or switchable class MethodComparator { private: static BytecodeStream *_s_old, *_s_new; static ConstantPool* _old_cp; static ConstantPool* _new_cp; static BciMap *_bci_map; static bool _switchable_test; static GrowableArray<int> *_fwd_jmps; static bool args_same(Bytecodes::Code c_old, Bytecodes::Code c_new); static bool pool_constants_same(int cpi_old, int cpi_new); static int check_stack_and_locals_size(Method* old_method, Method* new_method); public: // Check if the new method is equivalent to the old one modulo constant pool (EMCP). // Intuitive definition: two versions of the same method are EMCP, if they don't differ // on the source code level. Practically, we check whether the only difference between // method versions is some constantpool indices embedded into the bytecodes, and whether // these indices eventually point to the same constants for both method versions. static bool methods_EMCP(Method* old_method, Method* new_method); static bool methods_switchable(Method* old_method, Method* new_method, BciMap &bci_map); }; // ByteCode Index Map. For two versions of the same method, where the new version may contain // fragments not found in the old version, provides a mapping from an index of a bytecode in // the old method to the index of the same bytecode in the new method. class BciMap { private: int *_old_bci, *_new_st_bci, *_new_end_bci; int _cur_size, _cur_pos; int _pos; public: BciMap() { _cur_size = 50; _old_bci = (int*) malloc(sizeof(int) * _cur_size); _new_st_bci = (int*) malloc(sizeof(int) * _cur_size); _new_end_bci = (int*) malloc(sizeof(int) * _cur_size); _cur_pos = 0; } ~BciMap() { free(_old_bci); free(_new_st_bci); free(_new_end_bci); } // Store the position of an added fragment, e.g. // // |<- old_bci // ----------------------------------------- // Old method |invokevirtual 5|aload 1|... // ----------------------------------------- // // |<- new_st_bci |<- new_end_bci // -------------------------------------------------------------------- // New method |invokevirual 5|aload 2|invokevirtual 6|aload 1|... // -------------------------------------------------------------------- // ^^^^^^^^^^^^^^^^^^^^^^^^ // Added fragment void store_fragment_location(int old_bci, int new_st_bci, int new_end_bci) { if (_cur_pos == _cur_size) { _cur_size += 10; _old_bci = (int*) realloc(_old_bci, sizeof(int) * _cur_size); _new_st_bci = (int*) realloc(_new_st_bci, sizeof(int) * _cur_size); _new_end_bci = (int*) realloc(_new_end_bci, sizeof(int) * _cur_size); } _old_bci[_cur_pos] = old_bci; _new_st_bci[_cur_pos] = new_st_bci; _new_end_bci[_cur_pos] = new_end_bci; _cur_pos++; } int new_bci_for_old(int old_bci) { if (_cur_pos == 0 || old_bci < _old_bci[0]) return old_bci; _pos = 1; while (_pos < _cur_pos && old_bci >= _old_bci[_pos]) _pos++; return _new_end_bci[_pos-1] + (old_bci - _old_bci[_pos-1]); } // Test if two indexes - one in the old method and another in the new one - correspond // to the same bytecode bool old_and_new_locations_same(int old_dest_bci, int new_dest_bci) { if (new_bci_for_old(old_dest_bci) == new_dest_bci) return true; else if (_old_bci[_pos-1] == old_dest_bci) return (new_dest_bci == _new_st_bci[_pos-1]); else return false; } }; #endif // SHARE_VM_PRIMS_METHODCOMPARATOR_HPP