Mercurial > hg > truffle
annotate src/share/vm/code/codeCache.hpp @ 7693:826632227602
fixed visual studio warnings
author | Christian Haeubl <haeubl@ssw.jku.at> |
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date | Mon, 04 Feb 2013 14:35:52 +0100 |
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0 | 1 /* |
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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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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_CODE_CODECACHE_HPP |
26 #define SHARE_VM_CODE_CODECACHE_HPP | |
27 | |
28 #include "code/codeBlob.hpp" | |
29 #include "memory/allocation.hpp" | |
30 #include "memory/heap.hpp" | |
31 #include "oops/instanceKlass.hpp" | |
32 #include "oops/oopsHierarchy.hpp" | |
33 | |
0 | 34 // The CodeCache implements the code cache for various pieces of generated |
35 // code, e.g., compiled java methods, runtime stubs, transition frames, etc. | |
36 // The entries in the CodeCache are all CodeBlob's. | |
37 | |
38 // Implementation: | |
39 // - Each CodeBlob occupies one chunk of memory. | |
40 // - Like the offset table in oldspace the zone has at table for | |
41 // locating a method given a addess of an instruction. | |
42 | |
43 class OopClosure; | |
44 class DepChange; | |
45 | |
46 class CodeCache : AllStatic { | |
47 friend class VMStructs; | |
48 private: | |
49 // CodeHeap is malloc()'ed at startup and never deleted during shutdown, | |
50 // so that the generated assembly code is always there when it's needed. | |
51 // This may cause memory leak, but is necessary, for now. See 4423824, | |
52 // 4422213 or 4436291 for details. | |
53 static CodeHeap * _heap; | |
54 static int _number_of_blobs; | |
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55 static int _number_of_adapters; |
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56 static int _number_of_nmethods; |
0 | 57 static int _number_of_nmethods_with_dependencies; |
58 static bool _needs_cache_clean; | |
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59 static nmethod* _scavenge_root_nmethods; // linked via nm->scavenge_root_link() |
1202 | 60 static nmethod* _saved_nmethods; // linked via nm->saved_nmethod_look() |
0 | 61 |
62 static void verify_if_often() PRODUCT_RETURN; | |
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63 |
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64 static void mark_scavenge_root_nmethods() PRODUCT_RETURN; |
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65 static void verify_perm_nmethods(CodeBlobClosure* f_or_null) PRODUCT_RETURN; |
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66 |
0 | 67 public: |
68 | |
69 // Initialization | |
70 static void initialize(); | |
71 | |
72 // Allocation/administration | |
73 static CodeBlob* allocate(int size); // allocates a new CodeBlob | |
74 static void commit(CodeBlob* cb); // called when the allocated CodeBlob has been filled | |
75 static int alignment_unit(); // guaranteed alignment of all CodeBlobs | |
76 static int alignment_offset(); // guaranteed offset of first CodeBlob byte within alignment unit (i.e., allocation header) | |
77 static void free(CodeBlob* cb); // frees a CodeBlob | |
78 static void flush(); // flushes all CodeBlobs | |
79 static bool contains(void *p); // returns whether p is included | |
80 static void blobs_do(void f(CodeBlob* cb)); // iterates over all CodeBlobs | |
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81 static void blobs_do(CodeBlobClosure* f); // iterates over all CodeBlobs |
0 | 82 static void nmethods_do(void f(nmethod* nm)); // iterates over all nmethods |
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83 static void alive_nmethods_do(void f(nmethod* nm)); // iterates over all alive nmethods |
0 | 84 |
85 // Lookup | |
86 static CodeBlob* find_blob(void* start); | |
87 static nmethod* find_nmethod(void* start); | |
88 | |
89 // Lookup that does not fail if you lookup a zombie method (if you call this, be sure to know | |
90 // what you are doing) | |
91 static CodeBlob* find_blob_unsafe(void* start) { | |
6197 | 92 // NMT can walk the stack before code cache is created |
93 if (_heap == NULL) return NULL; | |
94 | |
0 | 95 CodeBlob* result = (CodeBlob*)_heap->find_start(start); |
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96 // this assert is too strong because the heap code will return the |
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97 // heapblock containing start. That block can often be larger than |
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98 // the codeBlob itself. If you look up an address that is within |
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99 // the heapblock but not in the codeBlob you will assert. |
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100 // |
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101 // Most things will not lookup such bad addresses. However |
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102 // AsyncGetCallTrace can see intermediate frames and get that kind |
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103 // of invalid address and so can a developer using hsfind. |
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104 // |
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105 // The more correct answer is to return NULL if blob_contains() returns |
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106 // false. |
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107 // assert(result == NULL || result->blob_contains((address)start), "found wrong CodeBlob"); |
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108 |
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109 if (result != NULL && !result->blob_contains((address)start)) { |
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110 result = NULL; |
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111 } |
0 | 112 return result; |
113 } | |
114 | |
115 // Iteration | |
116 static CodeBlob* first(); | |
117 static CodeBlob* next (CodeBlob* cb); | |
118 static CodeBlob* alive(CodeBlob *cb); | |
119 static nmethod* alive_nmethod(CodeBlob *cb); | |
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120 static nmethod* first_nmethod(); |
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121 static nmethod* next_nmethod (CodeBlob* cb); |
0 | 122 static int nof_blobs() { return _number_of_blobs; } |
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123 static int nof_adapters() { return _number_of_adapters; } |
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124 static int nof_nmethods() { return _number_of_nmethods; } |
0 | 125 |
126 // GC support | |
127 static void gc_epilogue(); | |
128 static void gc_prologue(); | |
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129 static void verify_oops(); |
0 | 130 // If "unloading_occurred" is true, then unloads (i.e., breaks root links |
131 // to) any unmarked codeBlobs in the cache. Sets "marked_for_unloading" | |
132 // to "true" iff some code got unloaded. | |
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133 static void do_unloading(BoolObjectClosure* is_alive, bool unloading_occurred); |
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134 static void oops_do(OopClosure* f) { |
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135 CodeBlobToOopClosure oopc(f, /*do_marking=*/ false); |
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136 blobs_do(&oopc); |
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137 } |
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138 static void asserted_non_scavengable_nmethods_do(CodeBlobClosure* f = NULL) PRODUCT_RETURN; |
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139 static void scavenge_root_nmethods_do(CodeBlobClosure* f); |
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140 |
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141 static nmethod* scavenge_root_nmethods() { return _scavenge_root_nmethods; } |
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142 static void set_scavenge_root_nmethods(nmethod* nm) { _scavenge_root_nmethods = nm; } |
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143 static void add_scavenge_root_nmethod(nmethod* nm); |
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144 static void drop_scavenge_root_nmethod(nmethod* nm); |
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145 static void prune_scavenge_root_nmethods(); |
0 | 146 |
147 // Printing/debugging | |
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148 static void print(); // prints summary |
0 | 149 static void print_internals(); |
150 static void verify(); // verifies the code cache | |
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151 static void print_trace(const char* event, CodeBlob* cb, int size = 0) PRODUCT_RETURN; |
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152 static void print_summary(outputStream* st, bool detailed = true); // Prints a summary of the code cache usage |
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153 static void log_state(outputStream* st); |
0 | 154 |
155 // The full limits of the codeCache | |
156 static address low_bound() { return (address) _heap->low_boundary(); } | |
157 static address high_bound() { return (address) _heap->high_boundary(); } | |
158 | |
159 // Profiling | |
160 static address first_address(); // first address used for CodeBlobs | |
161 static address last_address(); // last address used for CodeBlobs | |
162 static size_t capacity() { return _heap->capacity(); } | |
163 static size_t max_capacity() { return _heap->max_capacity(); } | |
164 static size_t unallocated_capacity() { return _heap->unallocated_capacity(); } | |
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165 static size_t largest_free_block(); |
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166 static bool needs_flushing() { return largest_free_block() < CodeCacheFlushingMinimumFreeSpace; } |
0 | 167 |
168 static bool needs_cache_clean() { return _needs_cache_clean; } | |
169 static void set_needs_cache_clean(bool v) { _needs_cache_clean = v; } | |
170 static void clear_inline_caches(); // clear all inline caches | |
171 | |
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172 static nmethod* find_and_remove_saved_code(Method* m); |
1202 | 173 static void remove_saved_code(nmethod* nm); |
174 static void speculatively_disconnect(nmethod* nm); | |
175 | |
0 | 176 // Deoptimization |
177 static int mark_for_deoptimization(DepChange& changes); | |
178 #ifdef HOTSWAP | |
179 static int mark_for_evol_deoptimization(instanceKlassHandle dependee); | |
180 #endif // HOTSWAP | |
181 | |
182 static void mark_all_nmethods_for_deoptimization(); | |
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183 static int mark_for_deoptimization(Method* dependee); |
0 | 184 static void make_marked_nmethods_zombies(); |
185 static void make_marked_nmethods_not_entrant(); | |
186 | |
187 // tells how many nmethods have dependencies | |
188 static int number_of_nmethods_with_dependencies(); | |
189 }; | |
1972 | 190 |
191 #endif // SHARE_VM_CODE_CODECACHE_HPP |