Tue, 12 Oct 2010 23:51:20 -0700
6991512: G1 barriers fail with 64bit C1
Summary: Fix compare-and-swap intrinsic problem with G1 post-barriers and issue with branch ranges in G1 stubs on sparc
Reviewed-by: never, kvn
duke@435 | 1 | /* |
trims@1907 | 2 | * Copyright (c) 1997, 2009, Oracle and/or its affiliates. All rights reserved. |
duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@435 | 4 | * |
duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
duke@435 | 7 | * published by the Free Software Foundation. |
duke@435 | 8 | * |
duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@435 | 13 | * accompanied this code). |
duke@435 | 14 | * |
duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@435 | 18 | * |
trims@1907 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
trims@1907 | 20 | * or visit www.oracle.com if you need additional information or have any |
trims@1907 | 21 | * questions. |
duke@435 | 22 | * |
duke@435 | 23 | */ |
duke@435 | 24 | |
duke@435 | 25 | #include "incls/_precompiled.incl" |
duke@435 | 26 | #include "incls/_icBuffer_sparc.cpp.incl" |
duke@435 | 27 | |
duke@435 | 28 | int InlineCacheBuffer::ic_stub_code_size() { |
duke@435 | 29 | #ifdef _LP64 |
duke@435 | 30 | if (TraceJumps) return 600 * wordSize; |
duke@435 | 31 | return (NativeMovConstReg::instruction_size + // sethi;add |
duke@435 | 32 | NativeJump::instruction_size + // sethi; jmp; delay slot |
duke@435 | 33 | (1*BytesPerInstWord) + 1); // flush + 1 extra byte |
duke@435 | 34 | #else |
duke@435 | 35 | if (TraceJumps) return 300 * wordSize; |
duke@435 | 36 | return (2+2+ 1) * wordSize + 1; // set/jump_to/nop + 1 byte so that code_end can be set in CodeBuffer |
duke@435 | 37 | #endif |
duke@435 | 38 | } |
duke@435 | 39 | |
duke@435 | 40 | void InlineCacheBuffer::assemble_ic_buffer_code(address code_begin, oop cached_oop, address entry_point) { |
duke@435 | 41 | ResourceMark rm; |
duke@435 | 42 | CodeBuffer code(code_begin, ic_stub_code_size()); |
duke@435 | 43 | MacroAssembler* masm = new MacroAssembler(&code); |
duke@435 | 44 | // note: even though the code contains an embedded oop, we do not need reloc info |
duke@435 | 45 | // because |
duke@435 | 46 | // (1) the oop is old (i.e., doesn't matter for scavenges) |
duke@435 | 47 | // (2) these ICStubs are removed *before* a GC happens, so the roots disappear |
duke@435 | 48 | assert(cached_oop == NULL || cached_oop->is_perm(), "must be old oop"); |
twisti@1162 | 49 | AddressLiteral cached_oop_addrlit(cached_oop, relocInfo::none); |
twisti@1162 | 50 | // Force the set to generate the fixed sequence so next_instruction_address works |
twisti@1162 | 51 | masm->patchable_set(cached_oop_addrlit, G5_inline_cache_reg); |
duke@435 | 52 | assert(G3_scratch != G5_method, "Do not clobber the method oop in the transition stub"); |
duke@435 | 53 | assert(G3_scratch != G5_inline_cache_reg, "Do not clobber the inline cache register in the transition stub"); |
twisti@1162 | 54 | AddressLiteral entry(entry_point); |
twisti@1162 | 55 | masm->JUMP(entry, G3_scratch, 0); |
duke@435 | 56 | masm->delayed()->nop(); |
duke@435 | 57 | masm->flush(); |
duke@435 | 58 | } |
duke@435 | 59 | |
duke@435 | 60 | |
duke@435 | 61 | address InlineCacheBuffer::ic_buffer_entry_point(address code_begin) { |
duke@435 | 62 | NativeMovConstReg* move = nativeMovConstReg_at(code_begin); // creation also verifies the object |
duke@435 | 63 | NativeJump* jump = nativeJump_at(move->next_instruction_address()); |
duke@435 | 64 | return jump->jump_destination(); |
duke@435 | 65 | } |
duke@435 | 66 | |
duke@435 | 67 | |
duke@435 | 68 | oop InlineCacheBuffer::ic_buffer_cached_oop(address code_begin) { |
duke@435 | 69 | NativeMovConstReg* move = nativeMovConstReg_at(code_begin); // creation also verifies the object |
duke@435 | 70 | NativeJump* jump = nativeJump_at(move->next_instruction_address()); |
duke@435 | 71 | return (oop)move->data(); |
duke@435 | 72 | } |