Mercurial > hg > truffle
annotate src/share/vm/ci/ciFlags.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 | 55fb97c4c58d |
| children | 4ca6dc0799b6 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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17467
55fb97c4c58d
8029233: Update copyright year to match last edit in jdk8 hotspot repository for 2013
mikael
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12190
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changeset
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2 * Copyright (c) 1999, 2013, 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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c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
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20 * or visit www.oracle.com if you need additional information or have any |
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c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef SHARE_VM_CI_CIFLAGS_HPP |
| 26 #define SHARE_VM_CI_CIFLAGS_HPP | |
| 27 | |
| 28 #include "ci/ciClassList.hpp" | |
| 29 #include "memory/allocation.hpp" | |
| 30 #include "prims/jvm.h" | |
| 31 #include "utilities/accessFlags.hpp" | |
| 32 | |
| 0 | 33 // ciFlags |
| 34 // | |
| 35 // This class represents klass or method flags. | |
| 36 class ciFlags VALUE_OBJ_CLASS_SPEC { | |
| 37 private: | |
| 38 friend class ciInstanceKlass; | |
| 39 friend class ciField; | |
| 40 friend class ciMethod; | |
| 41 | |
| 42 jint _flags; | |
| 43 | |
| 44 ciFlags() { _flags = 0; } | |
| 45 ciFlags(AccessFlags flags) { _flags = flags.as_int(); } | |
| 46 | |
| 47 public: | |
| 48 // Java access flags | |
| 49 bool is_public () const { return (_flags & JVM_ACC_PUBLIC ) != 0; } | |
| 50 bool is_private () const { return (_flags & JVM_ACC_PRIVATE ) != 0; } | |
| 51 bool is_protected () const { return (_flags & JVM_ACC_PROTECTED ) != 0; } | |
| 52 bool is_static () const { return (_flags & JVM_ACC_STATIC ) != 0; } | |
| 53 bool is_final () const { return (_flags & JVM_ACC_FINAL ) != 0; } | |
| 54 bool is_synchronized() const { return (_flags & JVM_ACC_SYNCHRONIZED) != 0; } | |
| 55 bool is_super () const { return (_flags & JVM_ACC_SUPER ) != 0; } | |
| 56 bool is_volatile () const { return (_flags & JVM_ACC_VOLATILE ) != 0; } | |
| 57 bool is_transient () const { return (_flags & JVM_ACC_TRANSIENT ) != 0; } | |
| 58 bool is_native () const { return (_flags & JVM_ACC_NATIVE ) != 0; } | |
| 59 bool is_interface () const { return (_flags & JVM_ACC_INTERFACE ) != 0; } | |
| 60 bool is_abstract () const { return (_flags & JVM_ACC_ABSTRACT ) != 0; } | |
| 61 bool is_strict () const { return (_flags & JVM_ACC_STRICT ) != 0; } | |
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edb5ab0f3fe5
8001107: @Stable annotation for constant folding of lazily evaluated variables
vlivanov
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1972
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62 bool is_stable () const { return (_flags & JVM_ACC_FIELD_STABLE) != 0; } |
| 0 | 63 |
| 64 // Conversion | |
| 65 jint as_int() { return _flags; } | |
| 66 | |
| 67 void print_klass_flags(outputStream* st = tty); | |
| 68 void print_member_flags(outputStream* st = tty); | |
| 69 void print(outputStream* st = tty); | |
| 70 }; | |
| 1972 | 71 |
| 72 #endif // SHARE_VM_CI_CIFLAGS_HPP |