Fri, 05 Oct 2012 18:57:10 -0700
7177003: C1: LogCompilation support
Summary: add LogCompilation support in C1 - both client and tiered mode.
Reviewed-by: twisti, kvn
duke@435 | 1 | /* |
stefank@2314 | 2 | * Copyright (c) 2000, 2010, 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 | #ifndef SHARE_VM_UTILITIES_SIZES_HPP |
stefank@2314 | 26 | #define SHARE_VM_UTILITIES_SIZES_HPP |
stefank@2314 | 27 | |
stefank@2314 | 28 | #include "memory/allocation.hpp" |
stefank@2314 | 29 | #include "utilities/globalDefinitions.hpp" |
stefank@2314 | 30 | |
duke@435 | 31 | // The following two classes are used to represent 'sizes' and 'offsets' in the VM; |
duke@435 | 32 | // they serve as 'unit' types. ByteSize is used for sizes measured in bytes, while |
duke@435 | 33 | // WordSize is used for sizes measured in machine words (i.e., 32bit or 64bit words |
duke@435 | 34 | // depending on platform). |
duke@435 | 35 | // |
duke@435 | 36 | // The classes are defined with friend functions operating on them instead of member |
duke@435 | 37 | // functions so that they (the classes) can be re-#define'd to int types in optimized |
duke@435 | 38 | // mode. This allows full type checking and maximum safety in debug mode, and full |
duke@435 | 39 | // optimizations (constant folding) and zero overhead (time and space wise) in the |
duke@435 | 40 | // optimized build (some compilers do not optimize one-element value classes but |
duke@435 | 41 | // instead create an object in memory - thus the overhead may be significant). |
duke@435 | 42 | // |
duke@435 | 43 | // Note: 1) DO NOT add new overloaded friend functions that do not have a unique function |
duke@435 | 44 | // function name but require signature types for resolution. This will not work |
duke@435 | 45 | // in optimized mode as both, ByteSize and WordSize are mapped to the same type |
duke@435 | 46 | // and thus the distinction would not be possible anymore (=> compiler errors). |
duke@435 | 47 | // |
duke@435 | 48 | // 2) DO NOT add non-static member functions as they cannot be mapped so something |
duke@435 | 49 | // compilable in the optimized build. Static member functions could be added |
duke@435 | 50 | // but require a corresponding class definition in the optimized build. |
duke@435 | 51 | // |
duke@435 | 52 | // These classes should help doing a transition from (currently) word-size based offsets |
duke@435 | 53 | // to byte-size based offsets in the VM (this will be important if we desire to pack |
duke@435 | 54 | // objects more densely in the VM for 64bit machines). Such a transition should proceed |
duke@435 | 55 | // in two steps to minimize the risk of introducing hard-to-find bugs: |
duke@435 | 56 | // |
duke@435 | 57 | // a) first transition the whole VM into a form where all sizes are strongly typed |
duke@435 | 58 | // b) change all WordSize's to ByteSize's where desired and fix the compilation errors |
duke@435 | 59 | |
duke@435 | 60 | |
duke@435 | 61 | #ifdef ASSERT |
duke@435 | 62 | |
duke@435 | 63 | class ByteSize VALUE_OBJ_CLASS_SPEC { |
duke@435 | 64 | private: |
duke@435 | 65 | int _size; |
duke@435 | 66 | |
duke@435 | 67 | // Note: This constructor must be private to avoid implicit conversions! |
duke@435 | 68 | ByteSize(int size) { _size = size; } |
duke@435 | 69 | |
duke@435 | 70 | public: |
duke@435 | 71 | // constructors |
duke@435 | 72 | inline friend ByteSize in_ByteSize(int size); |
duke@435 | 73 | |
duke@435 | 74 | // accessors |
duke@435 | 75 | inline friend int in_bytes(ByteSize x); |
duke@435 | 76 | |
duke@435 | 77 | // operators |
duke@435 | 78 | friend ByteSize operator + (ByteSize x, ByteSize y) { return ByteSize(in_bytes(x) + in_bytes(y)); } |
duke@435 | 79 | friend ByteSize operator - (ByteSize x, ByteSize y) { return ByteSize(in_bytes(x) - in_bytes(y)); } |
duke@435 | 80 | friend ByteSize operator * (ByteSize x, int y) { return ByteSize(in_bytes(x) * y ); } |
duke@435 | 81 | |
duke@435 | 82 | // comparison |
duke@435 | 83 | friend bool operator == (ByteSize x, ByteSize y) { return in_bytes(x) == in_bytes(y); } |
duke@435 | 84 | friend bool operator != (ByteSize x, ByteSize y) { return in_bytes(x) != in_bytes(y); } |
duke@435 | 85 | friend bool operator < (ByteSize x, ByteSize y) { return in_bytes(x) < in_bytes(y); } |
duke@435 | 86 | friend bool operator <= (ByteSize x, ByteSize y) { return in_bytes(x) <= in_bytes(y); } |
duke@435 | 87 | friend bool operator > (ByteSize x, ByteSize y) { return in_bytes(x) > in_bytes(y); } |
duke@435 | 88 | friend bool operator >= (ByteSize x, ByteSize y) { return in_bytes(x) >= in_bytes(y); } |
duke@435 | 89 | }; |
duke@435 | 90 | |
duke@435 | 91 | inline ByteSize in_ByteSize(int size) { return ByteSize(size); } |
duke@435 | 92 | inline int in_bytes(ByteSize x) { return x._size; } |
duke@435 | 93 | |
duke@435 | 94 | |
duke@435 | 95 | class WordSize VALUE_OBJ_CLASS_SPEC { |
duke@435 | 96 | private: |
duke@435 | 97 | int _size; |
duke@435 | 98 | |
duke@435 | 99 | // Note: This constructor must be private to avoid implicit conversions! |
duke@435 | 100 | WordSize(int size) { _size = size; } |
duke@435 | 101 | |
duke@435 | 102 | public: |
duke@435 | 103 | // constructors |
duke@435 | 104 | inline friend WordSize in_WordSize(int size); |
duke@435 | 105 | |
duke@435 | 106 | // accessors |
duke@435 | 107 | inline friend int in_words(WordSize x); |
duke@435 | 108 | |
duke@435 | 109 | // operators |
duke@435 | 110 | friend WordSize operator + (WordSize x, WordSize y) { return WordSize(in_words(x) + in_words(y)); } |
duke@435 | 111 | friend WordSize operator - (WordSize x, WordSize y) { return WordSize(in_words(x) - in_words(y)); } |
duke@435 | 112 | friend WordSize operator * (WordSize x, int y) { return WordSize(in_words(x) * y ); } |
duke@435 | 113 | |
duke@435 | 114 | // comparison |
duke@435 | 115 | friend bool operator == (WordSize x, WordSize y) { return in_words(x) == in_words(y); } |
duke@435 | 116 | friend bool operator != (WordSize x, WordSize y) { return in_words(x) != in_words(y); } |
duke@435 | 117 | friend bool operator < (WordSize x, WordSize y) { return in_words(x) < in_words(y); } |
duke@435 | 118 | friend bool operator <= (WordSize x, WordSize y) { return in_words(x) <= in_words(y); } |
duke@435 | 119 | friend bool operator > (WordSize x, WordSize y) { return in_words(x) > in_words(y); } |
duke@435 | 120 | friend bool operator >= (WordSize x, WordSize y) { return in_words(x) >= in_words(y); } |
duke@435 | 121 | }; |
duke@435 | 122 | |
duke@435 | 123 | inline WordSize in_WordSize(int size) { return WordSize(size); } |
duke@435 | 124 | inline int in_words(WordSize x) { return x._size; } |
duke@435 | 125 | |
duke@435 | 126 | |
duke@435 | 127 | #else // ASSERT |
duke@435 | 128 | |
duke@435 | 129 | // The following definitions must match the corresponding friend declarations |
duke@435 | 130 | // in the Byte/WordSize classes if they are typedef'ed to be int. This will |
duke@435 | 131 | // be the case in optimized mode to ensure zero overhead for these types. |
duke@435 | 132 | // |
duke@435 | 133 | // Note: If a compiler does not inline these function calls away, one may |
duke@435 | 134 | // want to use #define's to make sure full optimization (constant |
duke@435 | 135 | // folding in particular) is possible. |
duke@435 | 136 | |
duke@435 | 137 | typedef int ByteSize; |
duke@435 | 138 | inline ByteSize in_ByteSize(int size) { return size; } |
duke@435 | 139 | inline int in_bytes (ByteSize x) { return x; } |
duke@435 | 140 | |
duke@435 | 141 | typedef int WordSize; |
duke@435 | 142 | inline WordSize in_WordSize(int size) { return size; } |
duke@435 | 143 | inline int in_words (WordSize x) { return x; } |
duke@435 | 144 | |
duke@435 | 145 | #endif // ASSERT |
duke@435 | 146 | |
duke@435 | 147 | |
duke@435 | 148 | // Use the following #define to get C++ field member offsets |
duke@435 | 149 | |
duke@435 | 150 | #define byte_offset_of(klass,field) in_ByteSize((int)offset_of(klass, field)) |
stefank@2314 | 151 | |
stefank@2314 | 152 | #endif // SHARE_VM_UTILITIES_SIZES_HPP |