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0
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1 /*
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2 * Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 # include "incls/_precompiled.incl"
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26 # include "incls/_codeCache.cpp.incl"
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27
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28 // Helper class for printing in CodeCache
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29
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30 class CodeBlob_sizes {
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31 private:
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32 int count;
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33 int total_size;
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34 int header_size;
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35 int code_size;
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36 int stub_size;
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37 int relocation_size;
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38 int scopes_oop_size;
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39 int scopes_data_size;
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40 int scopes_pcs_size;
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41
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42 public:
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43 CodeBlob_sizes() {
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44 count = 0;
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45 total_size = 0;
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46 header_size = 0;
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47 code_size = 0;
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48 stub_size = 0;
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49 relocation_size = 0;
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50 scopes_oop_size = 0;
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51 scopes_data_size = 0;
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52 scopes_pcs_size = 0;
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53 }
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54
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55 int total() { return total_size; }
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56 bool is_empty() { return count == 0; }
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57
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58 void print(const char* title) {
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59 tty->print_cr(" #%d %s = %dK (hdr %d%%, loc %d%%, code %d%%, stub %d%%, [oops %d%%, data %d%%, pcs %d%%])",
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60 count,
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61 title,
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62 total() / K,
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63 header_size * 100 / total_size,
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64 relocation_size * 100 / total_size,
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65 code_size * 100 / total_size,
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66 stub_size * 100 / total_size,
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67 scopes_oop_size * 100 / total_size,
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68 scopes_data_size * 100 / total_size,
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69 scopes_pcs_size * 100 / total_size);
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70 }
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71
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72 void add(CodeBlob* cb) {
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73 count++;
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74 total_size += cb->size();
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75 header_size += cb->header_size();
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76 relocation_size += cb->relocation_size();
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77 scopes_oop_size += cb->oops_size();
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78 if (cb->is_nmethod()) {
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79 nmethod *nm = (nmethod*)cb;
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80 code_size += nm->code_size();
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81 stub_size += nm->stub_size();
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82
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83 scopes_data_size += nm->scopes_data_size();
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84 scopes_pcs_size += nm->scopes_pcs_size();
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85 } else {
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86 code_size += cb->instructions_size();
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87 }
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88 }
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89 };
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90
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91
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92 // CodeCache implementation
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93
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94 CodeHeap * CodeCache::_heap = new CodeHeap();
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95 int CodeCache::_number_of_blobs = 0;
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96 int CodeCache::_number_of_nmethods_with_dependencies = 0;
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97 bool CodeCache::_needs_cache_clean = false;
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989
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98 nmethod* CodeCache::_scavenge_root_nmethods = NULL;
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1202
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99 nmethod* CodeCache::_saved_nmethods = NULL;
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0
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100
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101
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102 CodeBlob* CodeCache::first() {
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103 assert_locked_or_safepoint(CodeCache_lock);
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104 return (CodeBlob*)_heap->first();
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105 }
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106
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107
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108 CodeBlob* CodeCache::next(CodeBlob* cb) {
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109 assert_locked_or_safepoint(CodeCache_lock);
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110 return (CodeBlob*)_heap->next(cb);
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111 }
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112
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113
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114 CodeBlob* CodeCache::alive(CodeBlob *cb) {
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115 assert_locked_or_safepoint(CodeCache_lock);
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116 while (cb != NULL && !cb->is_alive()) cb = next(cb);
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117 return cb;
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118 }
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119
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120
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121 nmethod* CodeCache::alive_nmethod(CodeBlob* cb) {
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122 assert_locked_or_safepoint(CodeCache_lock);
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123 while (cb != NULL && (!cb->is_alive() || !cb->is_nmethod())) cb = next(cb);
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124 return (nmethod*)cb;
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125 }
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126
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127
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128 CodeBlob* CodeCache::allocate(int size) {
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129 // Do not seize the CodeCache lock here--if the caller has not
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130 // already done so, we are going to lose bigtime, since the code
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131 // cache will contain a garbage CodeBlob until the caller can
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132 // run the constructor for the CodeBlob subclass he is busy
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133 // instantiating.
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134 guarantee(size >= 0, "allocation request must be reasonable");
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135 assert_locked_or_safepoint(CodeCache_lock);
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136 CodeBlob* cb = NULL;
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137 _number_of_blobs++;
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138 while (true) {
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139 cb = (CodeBlob*)_heap->allocate(size);
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140 if (cb != NULL) break;
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141 if (!_heap->expand_by(CodeCacheExpansionSize)) {
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142 // Expansion failed
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143 return NULL;
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144 }
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145 if (PrintCodeCacheExtension) {
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146 ResourceMark rm;
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147 tty->print_cr("code cache extended to [" INTPTR_FORMAT ", " INTPTR_FORMAT "] (%d bytes)",
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148 (intptr_t)_heap->begin(), (intptr_t)_heap->end(),
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149 (address)_heap->end() - (address)_heap->begin());
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150 }
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151 }
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152 verify_if_often();
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989
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153 print_trace("allocation", cb, size);
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0
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154 return cb;
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155 }
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156
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157 void CodeCache::free(CodeBlob* cb) {
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158 assert_locked_or_safepoint(CodeCache_lock);
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159 verify_if_often();
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160
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989
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161 print_trace("free", cb);
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0
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162 if (cb->is_nmethod() && ((nmethod *)cb)->has_dependencies()) {
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163 _number_of_nmethods_with_dependencies--;
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164 }
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165 _number_of_blobs--;
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166
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167 _heap->deallocate(cb);
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168
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169 verify_if_often();
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170 assert(_number_of_blobs >= 0, "sanity check");
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171 }
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172
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173
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174 void CodeCache::commit(CodeBlob* cb) {
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175 // this is called by nmethod::nmethod, which must already own CodeCache_lock
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176 assert_locked_or_safepoint(CodeCache_lock);
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177 if (cb->is_nmethod() && ((nmethod *)cb)->has_dependencies()) {
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178 _number_of_nmethods_with_dependencies++;
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179 }
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180 // flush the hardware I-cache
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181 ICache::invalidate_range(cb->instructions_begin(), cb->instructions_size());
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182 }
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183
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184
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185 void CodeCache::flush() {
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186 assert_locked_or_safepoint(CodeCache_lock);
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187 Unimplemented();
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188 }
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189
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190
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191 // Iteration over CodeBlobs
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192
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193 #define FOR_ALL_BLOBS(var) for (CodeBlob *var = first() ; var != NULL; var = next(var) )
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194 #define FOR_ALL_ALIVE_BLOBS(var) for (CodeBlob *var = alive(first()); var != NULL; var = alive(next(var)))
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195 #define FOR_ALL_ALIVE_NMETHODS(var) for (nmethod *var = alive_nmethod(first()); var != NULL; var = alive_nmethod(next(var)))
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196
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197
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198 bool CodeCache::contains(void *p) {
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199 // It should be ok to call contains without holding a lock
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200 return _heap->contains(p);
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201 }
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202
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203
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204 // This method is safe to call without holding the CodeCache_lock, as long as a dead codeblob is not
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205 // looked up (i.e., one that has been marked for deletion). It only dependes on the _segmap to contain
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206 // valid indices, which it will always do, as long as the CodeBlob is not in the process of being recycled.
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207 CodeBlob* CodeCache::find_blob(void* start) {
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208 CodeBlob* result = find_blob_unsafe(start);
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209 if (result == NULL) return NULL;
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210 // We could potientially look up non_entrant methods
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211 guarantee(!result->is_zombie() || result->is_locked_by_vm() || is_error_reported(), "unsafe access to zombie method");
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212 return result;
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213 }
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214
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215 nmethod* CodeCache::find_nmethod(void* start) {
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216 CodeBlob *cb = find_blob(start);
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217 assert(cb == NULL || cb->is_nmethod(), "did not find an nmethod");
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218 return (nmethod*)cb;
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219 }
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220
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221
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222 void CodeCache::blobs_do(void f(CodeBlob* nm)) {
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223 assert_locked_or_safepoint(CodeCache_lock);
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224 FOR_ALL_BLOBS(p) {
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225 f(p);
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226 }
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227 }
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228
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229
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230 void CodeCache::nmethods_do(void f(nmethod* nm)) {
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231 assert_locked_or_safepoint(CodeCache_lock);
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232 FOR_ALL_BLOBS(nm) {
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233 if (nm->is_nmethod()) f((nmethod*)nm);
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234 }
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235 }
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236
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237
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238 int CodeCache::alignment_unit() {
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239 return (int)_heap->alignment_unit();
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240 }
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241
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242
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243 int CodeCache::alignment_offset() {
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244 return (int)_heap->alignment_offset();
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245 }
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246
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247
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248 // Mark code blobs for unloading if they contain otherwise
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249 // unreachable oops.
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250 void CodeCache::do_unloading(BoolObjectClosure* is_alive,
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251 OopClosure* keep_alive,
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252 bool unloading_occurred) {
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253 assert_locked_or_safepoint(CodeCache_lock);
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254 FOR_ALL_ALIVE_BLOBS(cb) {
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255 cb->do_unloading(is_alive, keep_alive, unloading_occurred);
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256 }
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257 }
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258
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989
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259 void CodeCache::blobs_do(CodeBlobClosure* f) {
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0
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260 assert_locked_or_safepoint(CodeCache_lock);
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261 FOR_ALL_ALIVE_BLOBS(cb) {
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989
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262 f->do_code_blob(cb);
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263
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264 #ifdef ASSERT
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265 if (cb->is_nmethod())
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266 ((nmethod*)cb)->verify_scavenge_root_oops();
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267 #endif //ASSERT
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0
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268 }
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269 }
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270
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989
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271 // Walk the list of methods which might contain non-perm oops.
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272 void CodeCache::scavenge_root_nmethods_do(CodeBlobClosure* f) {
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273 assert_locked_or_safepoint(CodeCache_lock);
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274 debug_only(mark_scavenge_root_nmethods());
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275
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276 for (nmethod* cur = scavenge_root_nmethods(); cur != NULL; cur = cur->scavenge_root_link()) {
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277 debug_only(cur->clear_scavenge_root_marked());
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278 assert(cur->scavenge_root_not_marked(), "");
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279 assert(cur->on_scavenge_root_list(), "else shouldn't be on this list");
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280
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281 bool is_live = (!cur->is_zombie() && !cur->is_unloaded());
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282 #ifndef PRODUCT
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283 if (TraceScavenge) {
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284 cur->print_on(tty, is_live ? "scavenge root" : "dead scavenge root"); tty->cr();
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285 }
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286 #endif //PRODUCT
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287 if (is_live)
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288 // Perform cur->oops_do(f), maybe just once per nmethod.
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289 f->do_code_blob(cur);
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290 }
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291
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292 // Check for stray marks.
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293 debug_only(verify_perm_nmethods(NULL));
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294 }
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295
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296 void CodeCache::add_scavenge_root_nmethod(nmethod* nm) {
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297 assert_locked_or_safepoint(CodeCache_lock);
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298 nm->set_on_scavenge_root_list();
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299 nm->set_scavenge_root_link(_scavenge_root_nmethods);
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300 set_scavenge_root_nmethods(nm);
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301 print_trace("add_scavenge_root", nm);
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302 }
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303
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304 void CodeCache::drop_scavenge_root_nmethod(nmethod* nm) {
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305 assert_locked_or_safepoint(CodeCache_lock);
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306 print_trace("drop_scavenge_root", nm);
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307 nmethod* last = NULL;
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308 nmethod* cur = scavenge_root_nmethods();
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309 while (cur != NULL) {
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310 nmethod* next = cur->scavenge_root_link();
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311 if (cur == nm) {
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312 if (last != NULL)
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313 last->set_scavenge_root_link(next);
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314 else set_scavenge_root_nmethods(next);
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315 nm->set_scavenge_root_link(NULL);
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316 nm->clear_on_scavenge_root_list();
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317 return;
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318 }
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319 last = cur;
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320 cur = next;
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321 }
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322 assert(false, "should have been on list");
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323 }
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324
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325 void CodeCache::prune_scavenge_root_nmethods() {
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326 assert_locked_or_safepoint(CodeCache_lock);
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327 debug_only(mark_scavenge_root_nmethods());
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328
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329 nmethod* last = NULL;
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330 nmethod* cur = scavenge_root_nmethods();
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331 while (cur != NULL) {
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332 nmethod* next = cur->scavenge_root_link();
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333 debug_only(cur->clear_scavenge_root_marked());
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334 assert(cur->scavenge_root_not_marked(), "");
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335 assert(cur->on_scavenge_root_list(), "else shouldn't be on this list");
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336
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337 if (!cur->is_zombie() && !cur->is_unloaded()
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338 && cur->detect_scavenge_root_oops()) {
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339 // Keep it. Advance 'last' to prevent deletion.
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340 last = cur;
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341 } else {
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342 // Prune it from the list, so we don't have to look at it any more.
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343 print_trace("prune_scavenge_root", cur);
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344 cur->set_scavenge_root_link(NULL);
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345 cur->clear_on_scavenge_root_list();
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346 if (last != NULL)
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347 last->set_scavenge_root_link(next);
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348 else set_scavenge_root_nmethods(next);
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349 }
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350 cur = next;
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351 }
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352
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353 // Check for stray marks.
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354 debug_only(verify_perm_nmethods(NULL));
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355 }
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356
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357 #ifndef PRODUCT
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358 void CodeCache::asserted_non_scavengable_nmethods_do(CodeBlobClosure* f) {
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359 // While we are here, verify the integrity of the list.
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360 mark_scavenge_root_nmethods();
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361 for (nmethod* cur = scavenge_root_nmethods(); cur != NULL; cur = cur->scavenge_root_link()) {
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362 assert(cur->on_scavenge_root_list(), "else shouldn't be on this list");
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363 cur->clear_scavenge_root_marked();
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364 }
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365 verify_perm_nmethods(f);
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366 }
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367
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368 // Temporarily mark nmethods that are claimed to be on the non-perm list.
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369 void CodeCache::mark_scavenge_root_nmethods() {
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370 FOR_ALL_ALIVE_BLOBS(cb) {
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371 if (cb->is_nmethod()) {
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372 nmethod *nm = (nmethod*)cb;
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373 assert(nm->scavenge_root_not_marked(), "clean state");
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374 if (nm->on_scavenge_root_list())
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375 nm->set_scavenge_root_marked();
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376 }
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377 }
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378 }
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379
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380 // If the closure is given, run it on the unlisted nmethods.
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381 // Also make sure that the effects of mark_scavenge_root_nmethods is gone.
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382 void CodeCache::verify_perm_nmethods(CodeBlobClosure* f_or_null) {
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383 FOR_ALL_ALIVE_BLOBS(cb) {
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384 bool call_f = (f_or_null != NULL);
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385 if (cb->is_nmethod()) {
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386 nmethod *nm = (nmethod*)cb;
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387 assert(nm->scavenge_root_not_marked(), "must be already processed");
|
|
|
388 if (nm->on_scavenge_root_list())
|
|
|
389 call_f = false; // don't show this one to the client
|
|
|
390 nm->verify_scavenge_root_oops();
|
|
|
391 } else {
|
|
|
392 call_f = false; // not an nmethod
|
|
|
393 }
|
|
|
394 if (call_f) f_or_null->do_code_blob(cb);
|
|
|
395 }
|
|
|
396 }
|
|
|
397 #endif //PRODUCT
|
|
|
398
|
|
1202
|
399
|
|
|
400 nmethod* CodeCache::find_and_remove_saved_code(methodOop m) {
|
|
|
401 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
|
|
|
402 nmethod* saved = _saved_nmethods;
|
|
|
403 nmethod* prev = NULL;
|
|
|
404 while (saved != NULL) {
|
|
|
405 if (saved->is_in_use() && saved->method() == m) {
|
|
|
406 if (prev != NULL) {
|
|
|
407 prev->set_saved_nmethod_link(saved->saved_nmethod_link());
|
|
|
408 } else {
|
|
|
409 _saved_nmethods = saved->saved_nmethod_link();
|
|
|
410 }
|
|
|
411 assert(saved->is_speculatively_disconnected(), "shouldn't call for other nmethods");
|
|
|
412 saved->set_speculatively_disconnected(false);
|
|
|
413 saved->set_saved_nmethod_link(NULL);
|
|
|
414 if (PrintMethodFlushing) {
|
|
|
415 saved->print_on(tty, " ### nmethod is reconnected");
|
|
|
416 }
|
|
|
417 if (LogCompilation && (xtty != NULL)) {
|
|
|
418 ttyLocker ttyl;
|
|
|
419 xtty->begin_elem("nmethod_reconnected compile_id='%3d'", saved->compile_id());
|
|
|
420 xtty->method(methodOop(m));
|
|
|
421 xtty->stamp();
|
|
|
422 xtty->end_elem();
|
|
|
423 }
|
|
|
424 return saved;
|
|
|
425 }
|
|
|
426 prev = saved;
|
|
|
427 saved = saved->saved_nmethod_link();
|
|
|
428 }
|
|
|
429 return NULL;
|
|
|
430 }
|
|
|
431
|
|
|
432 void CodeCache::remove_saved_code(nmethod* nm) {
|
|
|
433 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
|
|
|
434 assert(nm->is_speculatively_disconnected(), "shouldn't call for other nmethods");
|
|
|
435 nmethod* saved = _saved_nmethods;
|
|
|
436 nmethod* prev = NULL;
|
|
|
437 while (saved != NULL) {
|
|
|
438 if (saved == nm) {
|
|
|
439 if (prev != NULL) {
|
|
|
440 prev->set_saved_nmethod_link(saved->saved_nmethod_link());
|
|
|
441 } else {
|
|
|
442 _saved_nmethods = saved->saved_nmethod_link();
|
|
|
443 }
|
|
|
444 if (LogCompilation && (xtty != NULL)) {
|
|
|
445 ttyLocker ttyl;
|
|
|
446 xtty->begin_elem("nmethod_removed compile_id='%3d'", nm->compile_id());
|
|
|
447 xtty->stamp();
|
|
|
448 xtty->end_elem();
|
|
|
449 }
|
|
|
450 return;
|
|
|
451 }
|
|
|
452 prev = saved;
|
|
|
453 saved = saved->saved_nmethod_link();
|
|
|
454 }
|
|
|
455 ShouldNotReachHere();
|
|
|
456 }
|
|
|
457
|
|
|
458 void CodeCache::speculatively_disconnect(nmethod* nm) {
|
|
|
459 assert_locked_or_safepoint(CodeCache_lock);
|
|
|
460 assert(nm->is_in_use() && !nm->is_speculatively_disconnected(), "should only disconnect live nmethods");
|
|
|
461 nm->set_saved_nmethod_link(_saved_nmethods);
|
|
|
462 _saved_nmethods = nm;
|
|
|
463 if (PrintMethodFlushing) {
|
|
|
464 nm->print_on(tty, " ### nmethod is speculatively disconnected");
|
|
|
465 }
|
|
|
466 if (LogCompilation && (xtty != NULL)) {
|
|
|
467 ttyLocker ttyl;
|
|
|
468 xtty->begin_elem("nmethod_disconnected compile_id='%3d'", nm->compile_id());
|
|
|
469 xtty->method(methodOop(nm->method()));
|
|
|
470 xtty->stamp();
|
|
|
471 xtty->end_elem();
|
|
|
472 }
|
|
|
473 nm->method()->clear_code();
|
|
|
474 nm->set_speculatively_disconnected(true);
|
|
|
475 }
|
|
|
476
|
|
|
477
|
|
0
|
478 void CodeCache::gc_prologue() {
|
|
989
|
479 assert(!nmethod::oops_do_marking_is_active(), "oops_do_marking_epilogue must be called");
|
|
0
|
480 }
|
|
|
481
|
|
|
482
|
|
|
483 void CodeCache::gc_epilogue() {
|
|
|
484 assert_locked_or_safepoint(CodeCache_lock);
|
|
|
485 FOR_ALL_ALIVE_BLOBS(cb) {
|
|
|
486 if (cb->is_nmethod()) {
|
|
|
487 nmethod *nm = (nmethod*)cb;
|
|
|
488 assert(!nm->is_unloaded(), "Tautology");
|
|
|
489 if (needs_cache_clean()) {
|
|
|
490 nm->cleanup_inline_caches();
|
|
|
491 }
|
|
|
492 debug_only(nm->verify();)
|
|
|
493 }
|
|
|
494 cb->fix_oop_relocations();
|
|
|
495 }
|
|
|
496 set_needs_cache_clean(false);
|
|
989
|
497 prune_scavenge_root_nmethods();
|
|
|
498 assert(!nmethod::oops_do_marking_is_active(), "oops_do_marking_prologue must be called");
|
|
0
|
499 }
|
|
|
500
|
|
|
501
|
|
|
502 address CodeCache::first_address() {
|
|
|
503 assert_locked_or_safepoint(CodeCache_lock);
|
|
|
504 return (address)_heap->begin();
|
|
|
505 }
|
|
|
506
|
|
|
507
|
|
|
508 address CodeCache::last_address() {
|
|
|
509 assert_locked_or_safepoint(CodeCache_lock);
|
|
|
510 return (address)_heap->end();
|
|
|
511 }
|
|
|
512
|
|
|
513
|
|
|
514 void icache_init();
|
|
|
515
|
|
|
516 void CodeCache::initialize() {
|
|
|
517 assert(CodeCacheSegmentSize >= (uintx)CodeEntryAlignment, "CodeCacheSegmentSize must be large enough to align entry points");
|
|
|
518 #ifdef COMPILER2
|
|
|
519 assert(CodeCacheSegmentSize >= (uintx)OptoLoopAlignment, "CodeCacheSegmentSize must be large enough to align inner loops");
|
|
|
520 #endif
|
|
|
521 assert(CodeCacheSegmentSize >= sizeof(jdouble), "CodeCacheSegmentSize must be large enough to align constants");
|
|
|
522 // This was originally just a check of the alignment, causing failure, instead, round
|
|
|
523 // the code cache to the page size. In particular, Solaris is moving to a larger
|
|
|
524 // default page size.
|
|
|
525 CodeCacheExpansionSize = round_to(CodeCacheExpansionSize, os::vm_page_size());
|
|
|
526 InitialCodeCacheSize = round_to(InitialCodeCacheSize, os::vm_page_size());
|
|
|
527 ReservedCodeCacheSize = round_to(ReservedCodeCacheSize, os::vm_page_size());
|
|
|
528 if (!_heap->reserve(ReservedCodeCacheSize, InitialCodeCacheSize, CodeCacheSegmentSize)) {
|
|
|
529 vm_exit_during_initialization("Could not reserve enough space for code cache");
|
|
|
530 }
|
|
|
531
|
|
|
532 MemoryService::add_code_heap_memory_pool(_heap);
|
|
|
533
|
|
|
534 // Initialize ICache flush mechanism
|
|
|
535 // This service is needed for os::register_code_area
|
|
|
536 icache_init();
|
|
|
537
|
|
|
538 // Give OS a chance to register generated code area.
|
|
|
539 // This is used on Windows 64 bit platforms to register
|
|
|
540 // Structured Exception Handlers for our generated code.
|
|
|
541 os::register_code_area(_heap->low_boundary(), _heap->high_boundary());
|
|
|
542 }
|
|
|
543
|
|
|
544
|
|
|
545 void codeCache_init() {
|
|
|
546 CodeCache::initialize();
|
|
|
547 }
|
|
|
548
|
|
|
549 //------------------------------------------------------------------------------------------------
|
|
|
550
|
|
|
551 int CodeCache::number_of_nmethods_with_dependencies() {
|
|
|
552 return _number_of_nmethods_with_dependencies;
|
|
|
553 }
|
|
|
554
|
|
|
555 void CodeCache::clear_inline_caches() {
|
|
|
556 assert_locked_or_safepoint(CodeCache_lock);
|
|
|
557 FOR_ALL_ALIVE_NMETHODS(nm) {
|
|
|
558 nm->clear_inline_caches();
|
|
|
559 }
|
|
|
560 }
|
|
|
561
|
|
|
562 #ifndef PRODUCT
|
|
|
563 // used to keep track of how much time is spent in mark_for_deoptimization
|
|
|
564 static elapsedTimer dependentCheckTime;
|
|
|
565 static int dependentCheckCount = 0;
|
|
|
566 #endif // PRODUCT
|
|
|
567
|
|
|
568
|
|
|
569 int CodeCache::mark_for_deoptimization(DepChange& changes) {
|
|
|
570 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
|
|
|
571
|
|
|
572 #ifndef PRODUCT
|
|
|
573 dependentCheckTime.start();
|
|
|
574 dependentCheckCount++;
|
|
|
575 #endif // PRODUCT
|
|
|
576
|
|
|
577 int number_of_marked_CodeBlobs = 0;
|
|
|
578
|
|
|
579 // search the hierarchy looking for nmethods which are affected by the loading of this class
|
|
|
580
|
|
|
581 // then search the interfaces this class implements looking for nmethods
|
|
|
582 // which might be dependent of the fact that an interface only had one
|
|
|
583 // implementor.
|
|
|
584
|
|
|
585 { No_Safepoint_Verifier nsv;
|
|
|
586 for (DepChange::ContextStream str(changes, nsv); str.next(); ) {
|
|
|
587 klassOop d = str.klass();
|
|
|
588 number_of_marked_CodeBlobs += instanceKlass::cast(d)->mark_dependent_nmethods(changes);
|
|
|
589 }
|
|
|
590 }
|
|
|
591
|
|
|
592 if (VerifyDependencies) {
|
|
|
593 // Turn off dependency tracing while actually testing deps.
|
|
|
594 NOT_PRODUCT( FlagSetting fs(TraceDependencies, false) );
|
|
|
595 FOR_ALL_ALIVE_NMETHODS(nm) {
|
|
|
596 if (!nm->is_marked_for_deoptimization() &&
|
|
|
597 nm->check_all_dependencies()) {
|
|
|
598 ResourceMark rm;
|
|
|
599 tty->print_cr("Should have been marked for deoptimization:");
|
|
|
600 changes.print();
|
|
|
601 nm->print();
|
|
|
602 nm->print_dependencies();
|
|
|
603 }
|
|
|
604 }
|
|
|
605 }
|
|
|
606
|
|
|
607 #ifndef PRODUCT
|
|
|
608 dependentCheckTime.stop();
|
|
|
609 #endif // PRODUCT
|
|
|
610
|
|
|
611 return number_of_marked_CodeBlobs;
|
|
|
612 }
|
|
|
613
|
|
|
614
|
|
|
615 #ifdef HOTSWAP
|
|
|
616 int CodeCache::mark_for_evol_deoptimization(instanceKlassHandle dependee) {
|
|
|
617 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
|
|
|
618 int number_of_marked_CodeBlobs = 0;
|
|
|
619
|
|
|
620 // Deoptimize all methods of the evolving class itself
|
|
|
621 objArrayOop old_methods = dependee->methods();
|
|
|
622 for (int i = 0; i < old_methods->length(); i++) {
|
|
|
623 ResourceMark rm;
|
|
|
624 methodOop old_method = (methodOop) old_methods->obj_at(i);
|
|
|
625 nmethod *nm = old_method->code();
|
|
|
626 if (nm != NULL) {
|
|
|
627 nm->mark_for_deoptimization();
|
|
|
628 number_of_marked_CodeBlobs++;
|
|
|
629 }
|
|
|
630 }
|
|
|
631
|
|
|
632 FOR_ALL_ALIVE_NMETHODS(nm) {
|
|
|
633 if (nm->is_marked_for_deoptimization()) {
|
|
|
634 // ...Already marked in the previous pass; don't count it again.
|
|
|
635 } else if (nm->is_evol_dependent_on(dependee())) {
|
|
|
636 ResourceMark rm;
|
|
|
637 nm->mark_for_deoptimization();
|
|
|
638 number_of_marked_CodeBlobs++;
|
|
|
639 } else {
|
|
|
640 // flush caches in case they refer to a redefined methodOop
|
|
|
641 nm->clear_inline_caches();
|
|
|
642 }
|
|
|
643 }
|
|
|
644
|
|
|
645 return number_of_marked_CodeBlobs;
|
|
|
646 }
|
|
|
647 #endif // HOTSWAP
|
|
|
648
|
|
|
649
|
|
|
650 // Deoptimize all methods
|
|
|
651 void CodeCache::mark_all_nmethods_for_deoptimization() {
|
|
|
652 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
|
|
|
653 FOR_ALL_ALIVE_NMETHODS(nm) {
|
|
|
654 nm->mark_for_deoptimization();
|
|
|
655 }
|
|
|
656 }
|
|
|
657
|
|
|
658
|
|
|
659 int CodeCache::mark_for_deoptimization(methodOop dependee) {
|
|
|
660 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
|
|
|
661 int number_of_marked_CodeBlobs = 0;
|
|
|
662
|
|
|
663 FOR_ALL_ALIVE_NMETHODS(nm) {
|
|
|
664 if (nm->is_dependent_on_method(dependee)) {
|
|
|
665 ResourceMark rm;
|
|
|
666 nm->mark_for_deoptimization();
|
|
|
667 number_of_marked_CodeBlobs++;
|
|
|
668 }
|
|
|
669 }
|
|
|
670
|
|
|
671 return number_of_marked_CodeBlobs;
|
|
|
672 }
|
|
|
673
|
|
|
674 void CodeCache::make_marked_nmethods_zombies() {
|
|
|
675 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint");
|
|
|
676 FOR_ALL_ALIVE_NMETHODS(nm) {
|
|
|
677 if (nm->is_marked_for_deoptimization()) {
|
|
|
678
|
|
|
679 // If the nmethod has already been made non-entrant and it can be converted
|
|
|
680 // then zombie it now. Otherwise make it non-entrant and it will eventually
|
|
|
681 // be zombied when it is no longer seen on the stack. Note that the nmethod
|
|
|
682 // might be "entrant" and not on the stack and so could be zombied immediately
|
|
|
683 // but we can't tell because we don't track it on stack until it becomes
|
|
|
684 // non-entrant.
|
|
|
685
|
|
|
686 if (nm->is_not_entrant() && nm->can_not_entrant_be_converted()) {
|
|
|
687 nm->make_zombie();
|
|
|
688 } else {
|
|
|
689 nm->make_not_entrant();
|
|
|
690 }
|
|
|
691 }
|
|
|
692 }
|
|
|
693 }
|
|
|
694
|
|
|
695 void CodeCache::make_marked_nmethods_not_entrant() {
|
|
|
696 assert_locked_or_safepoint(CodeCache_lock);
|
|
|
697 FOR_ALL_ALIVE_NMETHODS(nm) {
|
|
|
698 if (nm->is_marked_for_deoptimization()) {
|
|
|
699 nm->make_not_entrant();
|
|
|
700 }
|
|
|
701 }
|
|
|
702 }
|
|
|
703
|
|
|
704 void CodeCache::verify() {
|
|
|
705 _heap->verify();
|
|
|
706 FOR_ALL_ALIVE_BLOBS(p) {
|
|
|
707 p->verify();
|
|
|
708 }
|
|
|
709 }
|
|
|
710
|
|
|
711 //------------------------------------------------------------------------------------------------
|
|
|
712 // Non-product version
|
|
|
713
|
|
|
714 #ifndef PRODUCT
|
|
|
715
|
|
|
716 void CodeCache::verify_if_often() {
|
|
|
717 if (VerifyCodeCacheOften) {
|
|
|
718 _heap->verify();
|
|
|
719 }
|
|
|
720 }
|
|
|
721
|
|
989
|
722 void CodeCache::print_trace(const char* event, CodeBlob* cb, int size) {
|
|
|
723 if (PrintCodeCache2) { // Need to add a new flag
|
|
|
724 ResourceMark rm;
|
|
|
725 if (size == 0) size = cb->size();
|
|
|
726 tty->print_cr("CodeCache %s: addr: " INTPTR_FORMAT ", size: 0x%x", event, cb, size);
|
|
|
727 }
|
|
|
728 }
|
|
|
729
|
|
0
|
730 void CodeCache::print_internals() {
|
|
|
731 int nmethodCount = 0;
|
|
|
732 int runtimeStubCount = 0;
|
|
|
733 int adapterCount = 0;
|
|
|
734 int deoptimizationStubCount = 0;
|
|
|
735 int uncommonTrapStubCount = 0;
|
|
|
736 int bufferBlobCount = 0;
|
|
|
737 int total = 0;
|
|
|
738 int nmethodAlive = 0;
|
|
|
739 int nmethodNotEntrant = 0;
|
|
|
740 int nmethodZombie = 0;
|
|
|
741 int nmethodUnloaded = 0;
|
|
|
742 int nmethodJava = 0;
|
|
|
743 int nmethodNative = 0;
|
|
|
744 int maxCodeSize = 0;
|
|
|
745 ResourceMark rm;
|
|
|
746
|
|
|
747 CodeBlob *cb;
|
|
|
748 for (cb = first(); cb != NULL; cb = next(cb)) {
|
|
|
749 total++;
|
|
|
750 if (cb->is_nmethod()) {
|
|
|
751 nmethod* nm = (nmethod*)cb;
|
|
|
752
|
|
|
753 if (Verbose && nm->method() != NULL) {
|
|
|
754 ResourceMark rm;
|
|
|
755 char *method_name = nm->method()->name_and_sig_as_C_string();
|
|
|
756 tty->print("%s", method_name);
|
|
|
757 if(nm->is_alive()) { tty->print_cr(" alive"); }
|
|
|
758 if(nm->is_not_entrant()) { tty->print_cr(" not-entrant"); }
|
|
|
759 if(nm->is_zombie()) { tty->print_cr(" zombie"); }
|
|
|
760 }
|
|
|
761
|
|
|
762 nmethodCount++;
|
|
|
763
|
|
|
764 if(nm->is_alive()) { nmethodAlive++; }
|
|
|
765 if(nm->is_not_entrant()) { nmethodNotEntrant++; }
|
|
|
766 if(nm->is_zombie()) { nmethodZombie++; }
|
|
|
767 if(nm->is_unloaded()) { nmethodUnloaded++; }
|
|
|
768 if(nm->is_native_method()) { nmethodNative++; }
|
|
|
769
|
|
|
770 if(nm->method() != NULL && nm->is_java_method()) {
|
|
|
771 nmethodJava++;
|
|
|
772 if(nm->code_size() > maxCodeSize) {
|
|
|
773 maxCodeSize = nm->code_size();
|
|
|
774 }
|
|
|
775 }
|
|
|
776 } else if (cb->is_runtime_stub()) {
|
|
|
777 runtimeStubCount++;
|
|
|
778 } else if (cb->is_deoptimization_stub()) {
|
|
|
779 deoptimizationStubCount++;
|
|
|
780 } else if (cb->is_uncommon_trap_stub()) {
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|
|
781 uncommonTrapStubCount++;
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|
|
782 } else if (cb->is_adapter_blob()) {
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|
|
783 adapterCount++;
|
|
|
784 } else if (cb->is_buffer_blob()) {
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|
|
785 bufferBlobCount++;
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|
|
786 }
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|
|
787 }
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|
|
788
|
|
|
789 int bucketSize = 512;
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|
|
790 int bucketLimit = maxCodeSize / bucketSize + 1;
|
|
|
791 int *buckets = NEW_C_HEAP_ARRAY(int, bucketLimit);
|
|
|
792 memset(buckets,0,sizeof(int) * bucketLimit);
|
|
|
793
|
|
|
794 for (cb = first(); cb != NULL; cb = next(cb)) {
|
|
|
795 if (cb->is_nmethod()) {
|
|
|
796 nmethod* nm = (nmethod*)cb;
|
|
|
797 if(nm->is_java_method()) {
|
|
|
798 buckets[nm->code_size() / bucketSize]++;
|
|
|
799 }
|
|
|
800 }
|
|
|
801 }
|
|
|
802 tty->print_cr("Code Cache Entries (total of %d)",total);
|
|
|
803 tty->print_cr("-------------------------------------------------");
|
|
|
804 tty->print_cr("nmethods: %d",nmethodCount);
|
|
|
805 tty->print_cr("\talive: %d",nmethodAlive);
|
|
|
806 tty->print_cr("\tnot_entrant: %d",nmethodNotEntrant);
|
|
|
807 tty->print_cr("\tzombie: %d",nmethodZombie);
|
|
|
808 tty->print_cr("\tunloaded: %d",nmethodUnloaded);
|
|
|
809 tty->print_cr("\tjava: %d",nmethodJava);
|
|
|
810 tty->print_cr("\tnative: %d",nmethodNative);
|
|
|
811 tty->print_cr("runtime_stubs: %d",runtimeStubCount);
|
|
|
812 tty->print_cr("adapters: %d",adapterCount);
|
|
|
813 tty->print_cr("buffer blobs: %d",bufferBlobCount);
|
|
|
814 tty->print_cr("deoptimization_stubs: %d",deoptimizationStubCount);
|
|
|
815 tty->print_cr("uncommon_traps: %d",uncommonTrapStubCount);
|
|
|
816 tty->print_cr("\nnmethod size distribution (non-zombie java)");
|
|
|
817 tty->print_cr("-------------------------------------------------");
|
|
|
818
|
|
|
819 for(int i=0; i<bucketLimit; i++) {
|
|
|
820 if(buckets[i] != 0) {
|
|
|
821 tty->print("%d - %d bytes",i*bucketSize,(i+1)*bucketSize);
|
|
|
822 tty->fill_to(40);
|
|
|
823 tty->print_cr("%d",buckets[i]);
|
|
|
824 }
|
|
|
825 }
|
|
|
826
|
|
|
827 FREE_C_HEAP_ARRAY(int, buckets);
|
|
|
828 }
|
|
|
829
|
|
|
830 void CodeCache::print() {
|
|
|
831 CodeBlob_sizes live;
|
|
|
832 CodeBlob_sizes dead;
|
|
|
833
|
|
|
834 FOR_ALL_BLOBS(p) {
|
|
|
835 if (!p->is_alive()) {
|
|
|
836 dead.add(p);
|
|
|
837 } else {
|
|
|
838 live.add(p);
|
|
|
839 }
|
|
|
840 }
|
|
|
841
|
|
|
842 tty->print_cr("CodeCache:");
|
|
|
843
|
|
|
844 tty->print_cr("nmethod dependency checking time %f", dependentCheckTime.seconds(),
|
|
|
845 dependentCheckTime.seconds() / dependentCheckCount);
|
|
|
846
|
|
|
847 if (!live.is_empty()) {
|
|
|
848 live.print("live");
|
|
|
849 }
|
|
|
850 if (!dead.is_empty()) {
|
|
|
851 dead.print("dead");
|
|
|
852 }
|
|
|
853
|
|
|
854
|
|
|
855 if (Verbose) {
|
|
|
856 // print the oop_map usage
|
|
|
857 int code_size = 0;
|
|
|
858 int number_of_blobs = 0;
|
|
|
859 int number_of_oop_maps = 0;
|
|
|
860 int map_size = 0;
|
|
|
861 FOR_ALL_BLOBS(p) {
|
|
|
862 if (p->is_alive()) {
|
|
|
863 number_of_blobs++;
|
|
|
864 code_size += p->instructions_size();
|
|
|
865 OopMapSet* set = p->oop_maps();
|
|
|
866 if (set != NULL) {
|
|
|
867 number_of_oop_maps += set->size();
|
|
|
868 map_size += set->heap_size();
|
|
|
869 }
|
|
|
870 }
|
|
|
871 }
|
|
|
872 tty->print_cr("OopMaps");
|
|
|
873 tty->print_cr(" #blobs = %d", number_of_blobs);
|
|
|
874 tty->print_cr(" code size = %d", code_size);
|
|
|
875 tty->print_cr(" #oop_maps = %d", number_of_oop_maps);
|
|
|
876 tty->print_cr(" map size = %d", map_size);
|
|
|
877 }
|
|
|
878
|
|
|
879 }
|
|
|
880
|
|
|
881 #endif // PRODUCT
|
