Mercurial > jdk8-mips64-public > hotspot / annotate
src/cpu/x86/vm/icBuffer_x86.cpp@bb1da64b0492 (annotated)
src/cpu/x86/vm/icBuffer_x86.cpp
Fri, 16 Aug 2019 16:50:17 +0200
- author
- eosterlund
- date
- Fri, 16 Aug 2019 16:50:17 +0200
- changeset 9834
- bb1da64b0492
- parent 4318
- cd3d6a6b95d9
- child 6876
- 710a3c8b516e
- permissions
- -rw-r--r--
8229345: Memory leak due to vtable stubs not being shared on SPARC
Reviewed-by: mdoerr, dholmes, kvn
| duke@435 | 1 | /* |
| coleenp@4037 | 2 | * Copyright (c) 1997, 2012, 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 | |
| stefank@2314 | 25 | #include "precompiled.hpp" |
| twisti@4318 | 26 | #include "asm/macroAssembler.hpp" |
| twisti@4318 | 27 | #include "asm/macroAssembler.inline.hpp" |
| stefank@2314 | 28 | #include "code/icBuffer.hpp" |
| stefank@2314 | 29 | #include "gc_interface/collectedHeap.inline.hpp" |
| stefank@2314 | 30 | #include "interpreter/bytecodes.hpp" |
| stefank@2314 | 31 | #include "memory/resourceArea.hpp" |
| stefank@2314 | 32 | #include "nativeInst_x86.hpp" |
| stefank@2314 | 33 | #include "oops/oop.inline.hpp" |
| stefank@2314 | 34 | #include "oops/oop.inline2.hpp" |
| duke@435 | 35 | |
| duke@435 | 36 | int InlineCacheBuffer::ic_stub_code_size() { |
| duke@435 | 37 | return NativeMovConstReg::instruction_size + |
| duke@435 | 38 | NativeJump::instruction_size + |
| duke@435 | 39 | 1; |
| duke@435 | 40 | // so that code_end can be set in CodeBuffer |
| duke@435 | 41 | // 64bit 16 = 5 + 10 bytes + 1 byte |
| duke@435 | 42 | // 32bit 11 = 10 bytes + 1 byte |
| duke@435 | 43 | } |
| duke@435 | 44 | |
| duke@435 | 45 | |
| duke@435 | 46 | |
| coleenp@4037 | 47 | void InlineCacheBuffer::assemble_ic_buffer_code(address code_begin, void* cached_value, address entry_point) { |
| duke@435 | 48 | ResourceMark rm; |
| duke@435 | 49 | CodeBuffer code(code_begin, ic_stub_code_size()); |
| duke@435 | 50 | MacroAssembler* masm = new MacroAssembler(&code); |
| coleenp@4037 | 51 | // note: even though the code contains an embedded value, we do not need reloc info |
| duke@435 | 52 | // because |
| coleenp@4037 | 53 | // (1) the value is old (i.e., doesn't matter for scavenges) |
| duke@435 | 54 | // (2) these ICStubs are removed *before* a GC happens, so the roots disappear |
| coleenp@4037 | 55 | // assert(cached_value == NULL || cached_oop->is_perm(), "must be perm oop"); |
| coleenp@4037 | 56 | masm->lea(rax, AddressLiteral((address) cached_value, relocInfo::metadata_type)); |
| duke@435 | 57 | masm->jump(ExternalAddress(entry_point)); |
| 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 | |
| coleenp@4037 | 68 | void* InlineCacheBuffer::ic_buffer_cached_value(address code_begin) { |
| duke@435 | 69 | // creation also verifies the object |
| duke@435 | 70 | NativeMovConstReg* move = nativeMovConstReg_at(code_begin); |
| duke@435 | 71 | // Verifies the jump |
| duke@435 | 72 | NativeJump* jump = nativeJump_at(move->next_instruction_address()); |
| coleenp@4037 | 73 | void* o = (void*)move->data(); |
| coleenp@4037 | 74 | return o; |
| duke@435 | 75 | } |
