0N/A/*
1879N/A * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
0N/A *
0N/A * This code is free software; you can redistribute it and/or modify it
0N/A * under the terms of the GNU General Public License version 2 only, as
0N/A * published by the Free Software Foundation.
0N/A *
0N/A * This code is distributed in the hope that it will be useful, but WITHOUT
0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
0N/A * version 2 for more details (a copy is included in the LICENSE file that
0N/A * accompanied this code).
0N/A *
0N/A * You should have received a copy of the GNU General Public License version
0N/A * 2 along with this work; if not, write to the Free Software Foundation,
0N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
0N/A *
1472N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1472N/A * or visit www.oracle.com if you need additional information or have any
1472N/A * questions.
0N/A *
0N/A */
0N/A
1879N/A#include "precompiled.hpp"
1879N/A#include "asm/assembler.hpp"
1879N/A#include "assembler_x86.inline.hpp"
1879N/A#include "code/icBuffer.hpp"
1879N/A#include "gc_interface/collectedHeap.inline.hpp"
1879N/A#include "interpreter/bytecodes.hpp"
1879N/A#include "memory/resourceArea.hpp"
1879N/A#include "nativeInst_x86.hpp"
1879N/A#include "oops/oop.inline.hpp"
1879N/A#include "oops/oop.inline2.hpp"
0N/A
0N/Aint InlineCacheBuffer::ic_stub_code_size() {
0N/A return NativeMovConstReg::instruction_size +
0N/A NativeJump::instruction_size +
0N/A 1;
0N/A // so that code_end can be set in CodeBuffer
0N/A // 64bit 16 = 5 + 10 bytes + 1 byte
0N/A // 32bit 11 = 10 bytes + 1 byte
0N/A}
0N/A
0N/A
0N/A
0N/Avoid InlineCacheBuffer::assemble_ic_buffer_code(address code_begin, oop cached_oop, address entry_point) {
0N/A ResourceMark rm;
0N/A CodeBuffer code(code_begin, ic_stub_code_size());
0N/A MacroAssembler* masm = new MacroAssembler(&code);
0N/A // note: even though the code contains an embedded oop, we do not need reloc info
0N/A // because
0N/A // (1) the oop is old (i.e., doesn't matter for scavenges)
0N/A // (2) these ICStubs are removed *before* a GC happens, so the roots disappear
0N/A assert(cached_oop == NULL || cached_oop->is_perm(), "must be perm oop");
0N/A masm->lea(rax, OopAddress((address) cached_oop));
0N/A masm->jump(ExternalAddress(entry_point));
0N/A}
0N/A
0N/A
0N/Aaddress InlineCacheBuffer::ic_buffer_entry_point(address code_begin) {
0N/A NativeMovConstReg* move = nativeMovConstReg_at(code_begin); // creation also verifies the object
0N/A NativeJump* jump = nativeJump_at(move->next_instruction_address());
0N/A return jump->jump_destination();
0N/A}
0N/A
0N/A
0N/Aoop InlineCacheBuffer::ic_buffer_cached_oop(address code_begin) {
0N/A // creation also verifies the object
0N/A NativeMovConstReg* move = nativeMovConstReg_at(code_begin);
0N/A // Verifies the jump
0N/A NativeJump* jump = nativeJump_at(move->next_instruction_address());
0N/A return (oop)move->data();
0N/A}