Wed, 27 Nov 2013 16:16:21 -0800
8029015: PPC64 (part 216): opto: trap based null and range checks
Summary: On PPC64 use tdi instruction that does a compare and raises SIGTRAP for NULL and range checks.
Reviewed-by: kvn
aoqi@0 | 1 | /* |
aoqi@0 | 2 | * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
aoqi@0 | 3 | * Copyright 2012, 2013 SAP AG. All rights reserved. |
aoqi@0 | 4 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
aoqi@0 | 5 | * |
aoqi@0 | 6 | * This code is free software; you can redistribute it and/or modify it |
aoqi@0 | 7 | * under the terms of the GNU General Public License version 2 only, as |
aoqi@0 | 8 | * published by the Free Software Foundation. |
aoqi@0 | 9 | * |
aoqi@0 | 10 | * This code is distributed in the hope that it will be useful, but WITHOUT |
aoqi@0 | 11 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
aoqi@0 | 12 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
aoqi@0 | 13 | * version 2 for more details (a copy is included in the LICENSE file that |
aoqi@0 | 14 | * accompanied this code). |
aoqi@0 | 15 | * |
aoqi@0 | 16 | * You should have received a copy of the GNU General Public License version |
aoqi@0 | 17 | * 2 along with this work; if not, write to the Free Software Foundation, |
aoqi@0 | 18 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
aoqi@0 | 19 | * |
aoqi@0 | 20 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
aoqi@0 | 21 | * or visit www.oracle.com if you need additional information or have any |
aoqi@0 | 22 | * questions. |
aoqi@0 | 23 | * |
aoqi@0 | 24 | */ |
aoqi@0 | 25 | |
aoqi@0 | 26 | #include "precompiled.hpp" |
aoqi@0 | 27 | #include "asm/macroAssembler.inline.hpp" |
aoqi@0 | 28 | #include "asm/codeBuffer.hpp" |
aoqi@0 | 29 | #include "memory/metaspaceShared.hpp" |
aoqi@0 | 30 | |
aoqi@0 | 31 | // Generate the self-patching vtable method: |
aoqi@0 | 32 | // |
aoqi@0 | 33 | // This method will be called (as any other Klass virtual method) with |
aoqi@0 | 34 | // the Klass itself as the first argument. Example: |
aoqi@0 | 35 | // |
aoqi@0 | 36 | // oop obj; |
aoqi@0 | 37 | // int size = obj->klass()->klass_part()->oop_size(this); |
aoqi@0 | 38 | // |
aoqi@0 | 39 | // for which the virtual method call is Klass::oop_size(); |
aoqi@0 | 40 | // |
aoqi@0 | 41 | // The dummy method is called with the Klass object as the first |
aoqi@0 | 42 | // operand, and an object as the second argument. |
aoqi@0 | 43 | // |
aoqi@0 | 44 | |
aoqi@0 | 45 | //===================================================================== |
aoqi@0 | 46 | |
aoqi@0 | 47 | // All of the dummy methods in the vtable are essentially identical, |
aoqi@0 | 48 | // differing only by an ordinal constant, and they bear no releationship |
aoqi@0 | 49 | // to the original method which the caller intended. Also, there needs |
aoqi@0 | 50 | // to be 'vtbl_list_size' instances of the vtable in order to |
aoqi@0 | 51 | // differentiate between the 'vtable_list_size' original Klass objects. |
aoqi@0 | 52 | |
aoqi@0 | 53 | void MetaspaceShared::generate_vtable_methods(void** vtbl_list, |
aoqi@0 | 54 | void** vtable, |
aoqi@0 | 55 | char** md_top, |
aoqi@0 | 56 | char* md_end, |
aoqi@0 | 57 | char** mc_top, |
aoqi@0 | 58 | char* mc_end) { |
aoqi@0 | 59 | Unimplemented(); |
aoqi@0 | 60 | } |
aoqi@0 | 61 |