Mercurial > hg > truffle
annotate src/cpu/x86/vm/icBuffer_x86.cpp @ 20304:a22acf6d7598
8048112: G1 Full GC needs to support the case when the very first region is not available
Summary: Refactor preparation for compaction during Full GC so that it lazily initializes the first compaction point. This also avoids problems later when the first region may not be committed. Also reviewed by K. Barrett.
Reviewed-by: brutisso
| author | tschatzl |
|---|---|
| date | Mon, 21 Jul 2014 10:00:31 +0200 |
| parents | cd3d6a6b95d9 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
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6964458: Reimplement class meta-data storage to use native memory
coleenp
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2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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6941466: Oracle rebranding changes for Hotspot repositories
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
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cd3d6a6b95d9
8003240: x86: move MacroAssembler into separate file
twisti
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26 #include "asm/macroAssembler.hpp" |
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cd3d6a6b95d9
8003240: x86: move MacroAssembler into separate file
twisti
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27 #include "asm/macroAssembler.inline.hpp" |
| 1972 | 28 #include "code/icBuffer.hpp" |
| 29 #include "gc_interface/collectedHeap.inline.hpp" | |
| 30 #include "interpreter/bytecodes.hpp" | |
| 31 #include "memory/resourceArea.hpp" | |
| 32 #include "nativeInst_x86.hpp" | |
| 33 #include "oops/oop.inline.hpp" | |
| 34 #include "oops/oop.inline2.hpp" | |
| 0 | 35 |
| 36 int InlineCacheBuffer::ic_stub_code_size() { | |
| 37 return NativeMovConstReg::instruction_size + | |
| 38 NativeJump::instruction_size + | |
| 39 1; | |
| 40 // so that code_end can be set in CodeBuffer | |
| 41 // 64bit 16 = 5 + 10 bytes + 1 byte | |
| 42 // 32bit 11 = 10 bytes + 1 byte | |
| 43 } | |
| 44 | |
| 45 | |
| 46 | |
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da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
1972
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47 void InlineCacheBuffer::assemble_ic_buffer_code(address code_begin, void* cached_value, address entry_point) { |
| 0 | 48 ResourceMark rm; |
| 49 CodeBuffer code(code_begin, ic_stub_code_size()); | |
| 50 MacroAssembler* masm = new MacroAssembler(&code); | |
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
1972
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51 // note: even though the code contains an embedded value, we do not need reloc info |
| 0 | 52 // because |
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
1972
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53 // (1) the value is old (i.e., doesn't matter for scavenges) |
| 0 | 54 // (2) these ICStubs are removed *before* a GC happens, so the roots disappear |
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
1972
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55 // assert(cached_value == NULL || cached_oop->is_perm(), "must be perm oop"); |
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da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
1972
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56 masm->lea(rax, AddressLiteral((address) cached_value, relocInfo::metadata_type)); |
| 0 | 57 masm->jump(ExternalAddress(entry_point)); |
| 58 } | |
| 59 | |
| 60 | |
| 61 address InlineCacheBuffer::ic_buffer_entry_point(address code_begin) { | |
| 62 NativeMovConstReg* move = nativeMovConstReg_at(code_begin); // creation also verifies the object | |
| 63 NativeJump* jump = nativeJump_at(move->next_instruction_address()); | |
| 64 return jump->jump_destination(); | |
| 65 } | |
| 66 | |
| 67 | |
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da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
1972
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68 void* InlineCacheBuffer::ic_buffer_cached_value(address code_begin) { |
| 0 | 69 // creation also verifies the object |
| 70 NativeMovConstReg* move = nativeMovConstReg_at(code_begin); | |
| 71 // Verifies the jump | |
| 72 NativeJump* jump = nativeJump_at(move->next_instruction_address()); | |
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da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
1972
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73 void* o = (void*)move->data(); |
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da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
1972
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74 return o; |
| 0 | 75 } |