Mercurial > hg > truffle
annotate src/share/vm/c1/c1_MacroAssembler.hpp @ 20543:e7d0505c8a30
8059758: Footprint regressions with JDK-8038423
Summary: Changes in JDK-8038423 always initialize (zero out) virtual memory used for auxiliary data structures. This causes a footprint regression for G1 in startup benchmarks. This is because they do not touch that memory at all, so the operating system does not actually commit these pages. The fix is to, if the initialization value of the data structures matches the default value of just committed memory (=0), do not do anything.
Reviewed-by: jwilhelm, brutisso
| author | tschatzl |
|---|---|
| date | Fri, 10 Oct 2014 15:51:58 +0200 |
| parents | 0bf37f737702 |
| children |
| rev | line source |
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| 0 | 1 /* |
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2 * Copyright (c) 2000, 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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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 #ifndef SHARE_VM_C1_C1_MACROASSEMBLER_HPP |
| 26 #define SHARE_VM_C1_C1_MACROASSEMBLER_HPP | |
| 27 | |
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28 #include "asm/macroAssembler.hpp" |
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29 #include "asm/macroAssembler.inline.hpp" |
| 1972 | 30 |
| 0 | 31 class CodeEmitInfo; |
| 32 | |
| 33 class C1_MacroAssembler: public MacroAssembler { | |
| 34 public: | |
| 35 // creation | |
| 36 C1_MacroAssembler(CodeBuffer* code) : MacroAssembler(code) { pd_init(); } | |
| 37 | |
| 38 //---------------------------------------------------- | |
| 39 void explicit_null_check(Register base); | |
| 40 | |
| 41 void inline_cache_check(Register receiver, Register iCache); | |
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42 void build_frame(int frame_size_in_bytes, int bang_size_in_bytes); |
| 1295 | 43 void remove_frame(int frame_size_in_bytes); |
| 0 | 44 |
| 45 void unverified_entry(Register receiver, Register ic_klass); | |
| 46 void verified_entry(); | |
| 47 void verify_stack_oop(int offset) PRODUCT_RETURN; | |
| 48 void verify_not_null_oop(Register r) PRODUCT_RETURN; | |
| 49 | |
| 1972 | 50 #ifdef TARGET_ARCH_x86 |
| 51 # include "c1_MacroAssembler_x86.hpp" | |
| 52 #endif | |
| 53 #ifdef TARGET_ARCH_sparc | |
| 54 # include "c1_MacroAssembler_sparc.hpp" | |
| 55 #endif | |
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56 #ifdef TARGET_ARCH_arm |
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57 # include "c1_MacroAssembler_arm.hpp" |
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58 #endif |
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59 #ifdef TARGET_ARCH_ppc |
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60 # include "c1_MacroAssembler_ppc.hpp" |
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61 #endif |
| 1972 | 62 |
| 0 | 63 }; |
| 64 | |
| 65 | |
| 66 | |
| 67 // A StubAssembler is a MacroAssembler w/ extra functionality for runtime | |
| 68 // stubs. Currently it 'knows' some stub info. Eventually, the information | |
| 69 // may be set automatically or can be asserted when using specialised | |
| 70 // StubAssembler functions. | |
| 71 | |
| 72 class StubAssembler: public C1_MacroAssembler { | |
| 73 private: | |
| 74 const char* _name; | |
| 75 bool _must_gc_arguments; | |
| 76 int _frame_size; | |
| 77 int _num_rt_args; | |
| 78 int _stub_id; | |
| 79 | |
| 80 public: | |
| 81 // creation | |
| 82 StubAssembler(CodeBuffer* code, const char * name, int stub_id); | |
| 83 void set_info(const char* name, bool must_gc_arguments); | |
| 84 | |
| 85 void set_frame_size(int size); | |
| 86 void set_num_rt_args(int args); | |
| 87 | |
| 88 // accessors | |
| 89 const char* name() const { return _name; } | |
| 90 bool must_gc_arguments() const { return _must_gc_arguments; } | |
| 91 int frame_size() const { return _frame_size; } | |
| 92 int num_rt_args() const { return _num_rt_args; } | |
| 93 int stub_id() const { return _stub_id; } | |
| 94 | |
| 95 // runtime calls (return offset of call to be used by GC map) | |
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6964458: Reimplement class meta-data storage to use native memory
coleenp
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96 int call_RT(Register oop_result1, Register metadata_result, address entry, int args_size = 0); |
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da91efe96a93
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coleenp
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97 int call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1); |
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da91efe96a93
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coleenp
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98 int call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2); |
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da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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2426
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99 int call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2, Register arg3); |
| 0 | 100 }; |
| 1972 | 101 |
| 102 #endif // SHARE_VM_C1_C1_MACROASSEMBLER_HPP |