Mercurial > hg > graal-compiler
view src/cpu/x86/vm/icBuffer_x86.cpp @ 18508:f56a5c4cd859
Treat String.value as implicit stable field
author | Andreas Woess <andreas.woess@jku.at> |
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date | Tue, 25 Nov 2014 20:28:56 +0100 |
parents | cd3d6a6b95d9 |
children |
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/* * Copyright (c) 1997, 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. * */ #include "precompiled.hpp" #include "asm/macroAssembler.hpp" #include "asm/macroAssembler.inline.hpp" #include "code/icBuffer.hpp" #include "gc_interface/collectedHeap.inline.hpp" #include "interpreter/bytecodes.hpp" #include "memory/resourceArea.hpp" #include "nativeInst_x86.hpp" #include "oops/oop.inline.hpp" #include "oops/oop.inline2.hpp" int InlineCacheBuffer::ic_stub_code_size() { return NativeMovConstReg::instruction_size + NativeJump::instruction_size + 1; // so that code_end can be set in CodeBuffer // 64bit 16 = 5 + 10 bytes + 1 byte // 32bit 11 = 10 bytes + 1 byte } void InlineCacheBuffer::assemble_ic_buffer_code(address code_begin, void* cached_value, address entry_point) { ResourceMark rm; CodeBuffer code(code_begin, ic_stub_code_size()); MacroAssembler* masm = new MacroAssembler(&code); // note: even though the code contains an embedded value, we do not need reloc info // because // (1) the value is old (i.e., doesn't matter for scavenges) // (2) these ICStubs are removed *before* a GC happens, so the roots disappear // assert(cached_value == NULL || cached_oop->is_perm(), "must be perm oop"); masm->lea(rax, AddressLiteral((address) cached_value, relocInfo::metadata_type)); masm->jump(ExternalAddress(entry_point)); } address InlineCacheBuffer::ic_buffer_entry_point(address code_begin) { NativeMovConstReg* move = nativeMovConstReg_at(code_begin); // creation also verifies the object NativeJump* jump = nativeJump_at(move->next_instruction_address()); return jump->jump_destination(); } void* InlineCacheBuffer::ic_buffer_cached_value(address code_begin) { // creation also verifies the object NativeMovConstReg* move = nativeMovConstReg_at(code_begin); // Verifies the jump NativeJump* jump = nativeJump_at(move->next_instruction_address()); void* o = (void*)move->data(); return o; }