| /* |
| * 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.inline.hpp" |
| #include "code/icBuffer.hpp" |
| #include "gc_interface/collectedHeap.inline.hpp" |
| #include "interpreter/bytecodes.hpp" |
| #include "memory/resourceArea.hpp" |
| #include "nativeInst_sparc.hpp" |
| #include "oops/oop.inline.hpp" |
| #include "oops/oop.inline2.hpp" |
| |
| int InlineCacheBuffer::ic_stub_code_size() { |
| #ifdef _LP64 |
| if (TraceJumps) return 600 * wordSize; |
| return (NativeMovConstReg::instruction_size + // sethi;add |
| NativeJump::instruction_size + // sethi; jmp; delay slot |
| (1*BytesPerInstWord) + 1); // flush + 1 extra byte |
| #else |
| if (TraceJumps) return 300 * wordSize; |
| return (2+2+ 1) * wordSize + 1; // set/jump_to/nop + 1 byte so that code_end can be set in CodeBuffer |
| #endif |
| } |
| |
| 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 metadata, we do not need reloc info |
| // because |
| // (1) the metadata is old (i.e., doesn't matter for scavenges) |
| // (2) these ICStubs are removed *before* a GC happens, so the roots disappear |
| AddressLiteral cached_value_addrlit((address)cached_value, relocInfo::none); |
| // Force the set to generate the fixed sequence so next_instruction_address works |
| masm->patchable_set(cached_value_addrlit, G5_inline_cache_reg); |
| assert(G3_scratch != G5_method, "Do not clobber the method oop in the transition stub"); |
| assert(G3_scratch != G5_inline_cache_reg, "Do not clobber the inline cache register in the transition stub"); |
| AddressLiteral entry(entry_point); |
| masm->JUMP(entry, G3_scratch, 0); |
| masm->delayed()->nop(); |
| masm->flush(); |
| } |
| |
| |
| 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) { |
| NativeMovConstReg* move = nativeMovConstReg_at(code_begin); // creation also verifies the object |
| NativeJump* jump = nativeJump_at(move->next_instruction_address()); |
| void* o = (void*)move->data(); |
| return o; |
| } |