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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/_nmethod.cpp.incl"
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27
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28 #ifdef DTRACE_ENABLED
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29
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30
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31 // Only bother with this argument setup if dtrace is available
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32
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33 HS_DTRACE_PROBE_DECL8(hotspot, compiled__method__load,
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34 const char*, int, const char*, int, const char*, int, void*, size_t);
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35
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36 HS_DTRACE_PROBE_DECL6(hotspot, compiled__method__unload,
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37 char*, int, char*, int, char*, int);
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38
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39 #define DTRACE_METHOD_UNLOAD_PROBE(method) \
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40 { \
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41 methodOop m = (method); \
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42 if (m != NULL) { \
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43 symbolOop klass_name = m->klass_name(); \
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44 symbolOop name = m->name(); \
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45 symbolOop signature = m->signature(); \
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46 HS_DTRACE_PROBE6(hotspot, compiled__method__unload, \
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47 klass_name->bytes(), klass_name->utf8_length(), \
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48 name->bytes(), name->utf8_length(), \
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49 signature->bytes(), signature->utf8_length()); \
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50 } \
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51 }
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52
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53 #else // ndef DTRACE_ENABLED
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54
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55 #define DTRACE_METHOD_UNLOAD_PROBE(method)
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56
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57 #endif
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58
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59 bool nmethod::is_compiled_by_c1() const {
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60 if (is_native_method()) return false;
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61 assert(compiler() != NULL, "must be");
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62 return compiler()->is_c1();
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63 }
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64 bool nmethod::is_compiled_by_c2() const {
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65 if (is_native_method()) return false;
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66 assert(compiler() != NULL, "must be");
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67 return compiler()->is_c2();
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68 }
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69
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70
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71
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72 //---------------------------------------------------------------------------------
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73 // NMethod statistics
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74 // They are printed under various flags, including:
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75 // PrintC1Statistics, PrintOptoStatistics, LogVMOutput, and LogCompilation.
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76 // (In the latter two cases, they like other stats are printed to the log only.)
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77
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78 #ifndef PRODUCT
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79 // These variables are put into one block to reduce relocations
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80 // and make it simpler to print from the debugger.
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81 static
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82 struct nmethod_stats_struct {
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83 int nmethod_count;
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84 int total_size;
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85 int relocation_size;
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86 int code_size;
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87 int stub_size;
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88 int consts_size;
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89 int scopes_data_size;
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90 int scopes_pcs_size;
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91 int dependencies_size;
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92 int handler_table_size;
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93 int nul_chk_table_size;
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94 int oops_size;
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95
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96 void note_nmethod(nmethod* nm) {
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97 nmethod_count += 1;
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98 total_size += nm->size();
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99 relocation_size += nm->relocation_size();
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100 code_size += nm->code_size();
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101 stub_size += nm->stub_size();
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102 consts_size += nm->consts_size();
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103 scopes_data_size += nm->scopes_data_size();
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104 scopes_pcs_size += nm->scopes_pcs_size();
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105 dependencies_size += nm->dependencies_size();
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106 handler_table_size += nm->handler_table_size();
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107 nul_chk_table_size += nm->nul_chk_table_size();
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108 oops_size += nm->oops_size();
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109 }
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110 void print_nmethod_stats() {
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111 if (nmethod_count == 0) return;
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112 tty->print_cr("Statistics for %d bytecoded nmethods:", nmethod_count);
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113 if (total_size != 0) tty->print_cr(" total in heap = %d", total_size);
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114 if (relocation_size != 0) tty->print_cr(" relocation = %d", relocation_size);
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115 if (code_size != 0) tty->print_cr(" main code = %d", code_size);
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116 if (stub_size != 0) tty->print_cr(" stub code = %d", stub_size);
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117 if (consts_size != 0) tty->print_cr(" constants = %d", consts_size);
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118 if (scopes_data_size != 0) tty->print_cr(" scopes data = %d", scopes_data_size);
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119 if (scopes_pcs_size != 0) tty->print_cr(" scopes pcs = %d", scopes_pcs_size);
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120 if (dependencies_size != 0) tty->print_cr(" dependencies = %d", dependencies_size);
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121 if (handler_table_size != 0) tty->print_cr(" handler table = %d", handler_table_size);
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122 if (nul_chk_table_size != 0) tty->print_cr(" nul chk table = %d", nul_chk_table_size);
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123 if (oops_size != 0) tty->print_cr(" oops = %d", oops_size);
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124 }
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125
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126 int native_nmethod_count;
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127 int native_total_size;
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128 int native_relocation_size;
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129 int native_code_size;
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130 int native_oops_size;
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131 void note_native_nmethod(nmethod* nm) {
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132 native_nmethod_count += 1;
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133 native_total_size += nm->size();
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134 native_relocation_size += nm->relocation_size();
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135 native_code_size += nm->code_size();
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136 native_oops_size += nm->oops_size();
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137 }
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138 void print_native_nmethod_stats() {
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139 if (native_nmethod_count == 0) return;
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140 tty->print_cr("Statistics for %d native nmethods:", native_nmethod_count);
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141 if (native_total_size != 0) tty->print_cr(" N. total size = %d", native_total_size);
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142 if (native_relocation_size != 0) tty->print_cr(" N. relocation = %d", native_relocation_size);
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143 if (native_code_size != 0) tty->print_cr(" N. main code = %d", native_code_size);
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144 if (native_oops_size != 0) tty->print_cr(" N. oops = %d", native_oops_size);
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145 }
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146
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147 int pc_desc_resets; // number of resets (= number of caches)
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148 int pc_desc_queries; // queries to nmethod::find_pc_desc
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149 int pc_desc_approx; // number of those which have approximate true
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150 int pc_desc_repeats; // number of _last_pc_desc hits
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151 int pc_desc_hits; // number of LRU cache hits
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152 int pc_desc_tests; // total number of PcDesc examinations
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153 int pc_desc_searches; // total number of quasi-binary search steps
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154 int pc_desc_adds; // number of LUR cache insertions
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155
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156 void print_pc_stats() {
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157 tty->print_cr("PcDesc Statistics: %d queries, %.2f comparisons per query",
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158 pc_desc_queries,
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159 (double)(pc_desc_tests + pc_desc_searches)
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160 / pc_desc_queries);
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161 tty->print_cr(" caches=%d queries=%d/%d, hits=%d+%d, tests=%d+%d, adds=%d",
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162 pc_desc_resets,
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163 pc_desc_queries, pc_desc_approx,
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164 pc_desc_repeats, pc_desc_hits,
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165 pc_desc_tests, pc_desc_searches, pc_desc_adds);
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166 }
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167 } nmethod_stats;
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168 #endif //PRODUCT
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169
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170 //---------------------------------------------------------------------------------
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171
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172
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173 // The _unwind_handler is a special marker address, which says that
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174 // for given exception oop and address, the frame should be removed
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175 // as the tuple cannot be caught in the nmethod
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176 address ExceptionCache::_unwind_handler = (address) -1;
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177
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178
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179 ExceptionCache::ExceptionCache(Handle exception, address pc, address handler) {
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180 assert(pc != NULL, "Must be non null");
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181 assert(exception.not_null(), "Must be non null");
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182 assert(handler != NULL, "Must be non null");
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183
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184 _count = 0;
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185 _exception_type = exception->klass();
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186 _next = NULL;
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187
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188 add_address_and_handler(pc,handler);
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189 }
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190
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191
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192 address ExceptionCache::match(Handle exception, address pc) {
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193 assert(pc != NULL,"Must be non null");
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194 assert(exception.not_null(),"Must be non null");
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195 if (exception->klass() == exception_type()) {
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196 return (test_address(pc));
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197 }
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198
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199 return NULL;
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200 }
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201
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202
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203 bool ExceptionCache::match_exception_with_space(Handle exception) {
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204 assert(exception.not_null(),"Must be non null");
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205 if (exception->klass() == exception_type() && count() < cache_size) {
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206 return true;
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207 }
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208 return false;
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209 }
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210
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211
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212 address ExceptionCache::test_address(address addr) {
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213 for (int i=0; i<count(); i++) {
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214 if (pc_at(i) == addr) {
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215 return handler_at(i);
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216 }
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217 }
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218 return NULL;
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219 }
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220
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221
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222 bool ExceptionCache::add_address_and_handler(address addr, address handler) {
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223 if (test_address(addr) == handler) return true;
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224 if (count() < cache_size) {
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225 set_pc_at(count(),addr);
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226 set_handler_at(count(), handler);
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227 increment_count();
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228 return true;
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229 }
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230 return false;
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231 }
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232
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233
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234 // private method for handling exception cache
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235 // These methods are private, and used to manipulate the exception cache
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236 // directly.
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237 ExceptionCache* nmethod::exception_cache_entry_for_exception(Handle exception) {
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238 ExceptionCache* ec = exception_cache();
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239 while (ec != NULL) {
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240 if (ec->match_exception_with_space(exception)) {
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241 return ec;
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242 }
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243 ec = ec->next();
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244 }
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245 return NULL;
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246 }
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247
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248
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249 //-----------------------------------------------------------------------------
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250
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251
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252 // Helper used by both find_pc_desc methods.
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253 static inline bool match_desc(PcDesc* pc, int pc_offset, bool approximate) {
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254 NOT_PRODUCT(++nmethod_stats.pc_desc_tests);
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255 if (!approximate)
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256 return pc->pc_offset() == pc_offset;
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257 else
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258 return (pc-1)->pc_offset() < pc_offset && pc_offset <= pc->pc_offset();
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259 }
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260
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261 void PcDescCache::reset_to(PcDesc* initial_pc_desc) {
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262 if (initial_pc_desc == NULL) {
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263 _last_pc_desc = NULL; // native method
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264 return;
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265 }
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266 NOT_PRODUCT(++nmethod_stats.pc_desc_resets);
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267 // reset the cache by filling it with benign (non-null) values
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268 assert(initial_pc_desc->pc_offset() < 0, "must be sentinel");
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269 _last_pc_desc = initial_pc_desc + 1; // first valid one is after sentinel
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270 for (int i = 0; i < cache_size; i++)
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271 _pc_descs[i] = initial_pc_desc;
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272 }
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273
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274 PcDesc* PcDescCache::find_pc_desc(int pc_offset, bool approximate) {
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275 NOT_PRODUCT(++nmethod_stats.pc_desc_queries);
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276 NOT_PRODUCT(if (approximate) ++nmethod_stats.pc_desc_approx);
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277
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278 // In order to prevent race conditions do not load cache elements
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279 // repeatedly, but use a local copy:
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280 PcDesc* res;
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281
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282 // Step one: Check the most recently returned value.
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283 res = _last_pc_desc;
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284 if (res == NULL) return NULL; // native method; no PcDescs at all
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285 if (match_desc(res, pc_offset, approximate)) {
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286 NOT_PRODUCT(++nmethod_stats.pc_desc_repeats);
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287 return res;
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288 }
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289
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290 // Step two: Check the LRU cache.
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291 for (int i = 0; i < cache_size; i++) {
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292 res = _pc_descs[i];
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293 if (res->pc_offset() < 0) break; // optimization: skip empty cache
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294 if (match_desc(res, pc_offset, approximate)) {
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295 NOT_PRODUCT(++nmethod_stats.pc_desc_hits);
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296 _last_pc_desc = res; // record this cache hit in case of repeat
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297 return res;
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298 }
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299 }
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300
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301 // Report failure.
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302 return NULL;
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303 }
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304
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305 void PcDescCache::add_pc_desc(PcDesc* pc_desc) {
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306 NOT_PRODUCT(++nmethod_stats.pc_desc_adds);
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307 // Update the LRU cache by shifting pc_desc forward:
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308 for (int i = 0; i < cache_size; i++) {
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309 PcDesc* next = _pc_descs[i];
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310 _pc_descs[i] = pc_desc;
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311 pc_desc = next;
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312 }
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313 // Note: Do not update _last_pc_desc. It fronts for the LRU cache.
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314 }
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315
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316 // adjust pcs_size so that it is a multiple of both oopSize and
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317 // sizeof(PcDesc) (assumes that if sizeof(PcDesc) is not a multiple
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318 // of oopSize, then 2*sizeof(PcDesc) is)
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319 static int adjust_pcs_size(int pcs_size) {
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320 int nsize = round_to(pcs_size, oopSize);
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321 if ((nsize % sizeof(PcDesc)) != 0) {
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322 nsize = pcs_size + sizeof(PcDesc);
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323 }
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324 assert((nsize % oopSize) == 0, "correct alignment");
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325 return nsize;
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326 }
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327
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328 //-----------------------------------------------------------------------------
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329
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330
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331 void nmethod::add_exception_cache_entry(ExceptionCache* new_entry) {
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332 assert(ExceptionCache_lock->owned_by_self(),"Must hold the ExceptionCache_lock");
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333 assert(new_entry != NULL,"Must be non null");
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334 assert(new_entry->next() == NULL, "Must be null");
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335
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336 if (exception_cache() != NULL) {
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337 new_entry->set_next(exception_cache());
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338 }
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339 set_exception_cache(new_entry);
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340 }
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341
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342 void nmethod::remove_from_exception_cache(ExceptionCache* ec) {
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343 ExceptionCache* prev = NULL;
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344 ExceptionCache* curr = exception_cache();
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345 assert(curr != NULL, "nothing to remove");
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346 // find the previous and next entry of ec
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347 while (curr != ec) {
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348 prev = curr;
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349 curr = curr->next();
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350 assert(curr != NULL, "ExceptionCache not found");
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351 }
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352 // now: curr == ec
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353 ExceptionCache* next = curr->next();
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354 if (prev == NULL) {
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355 set_exception_cache(next);
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356 } else {
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357 prev->set_next(next);
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358 }
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359 delete curr;
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360 }
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361
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362
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363 // public method for accessing the exception cache
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364 // These are the public access methods.
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365 address nmethod::handler_for_exception_and_pc(Handle exception, address pc) {
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366 // We never grab a lock to read the exception cache, so we may
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367 // have false negatives. This is okay, as it can only happen during
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368 // the first few exception lookups for a given nmethod.
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369 ExceptionCache* ec = exception_cache();
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370 while (ec != NULL) {
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371 address ret_val;
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372 if ((ret_val = ec->match(exception,pc)) != NULL) {
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373 return ret_val;
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374 }
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375 ec = ec->next();
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376 }
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377 return NULL;
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378 }
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379
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380
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381 void nmethod::add_handler_for_exception_and_pc(Handle exception, address pc, address handler) {
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382 // There are potential race conditions during exception cache updates, so we
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|
383 // must own the ExceptionCache_lock before doing ANY modifications. Because
|
|
|
384 // we dont lock during reads, it is possible to have several threads attempt
|
|
|
385 // to update the cache with the same data. We need to check for already inserted
|
|
|
386 // copies of the current data before adding it.
|
|
|
387
|
|
|
388 MutexLocker ml(ExceptionCache_lock);
|
|
|
389 ExceptionCache* target_entry = exception_cache_entry_for_exception(exception);
|
|
|
390
|
|
|
391 if (target_entry == NULL || !target_entry->add_address_and_handler(pc,handler)) {
|
|
|
392 target_entry = new ExceptionCache(exception,pc,handler);
|
|
|
393 add_exception_cache_entry(target_entry);
|
|
|
394 }
|
|
|
395 }
|
|
|
396
|
|
|
397
|
|
|
398 //-------------end of code for ExceptionCache--------------
|
|
|
399
|
|
|
400
|
|
|
401 void nmFlags::clear() {
|
|
|
402 assert(sizeof(nmFlags) == sizeof(int), "using more than one word for nmFlags");
|
|
|
403 *(jint*)this = 0;
|
|
|
404 }
|
|
|
405
|
|
|
406 int nmethod::total_size() const {
|
|
|
407 return
|
|
|
408 code_size() +
|
|
|
409 stub_size() +
|
|
|
410 consts_size() +
|
|
|
411 scopes_data_size() +
|
|
|
412 scopes_pcs_size() +
|
|
|
413 handler_table_size() +
|
|
|
414 nul_chk_table_size();
|
|
|
415 }
|
|
|
416
|
|
|
417 const char* nmethod::compile_kind() const {
|
|
|
418 if (method() == NULL) return "unloaded";
|
|
|
419 if (is_native_method()) return "c2n";
|
|
|
420 if (is_osr_method()) return "osr";
|
|
|
421 return NULL;
|
|
|
422 }
|
|
|
423
|
|
|
424 // %%% This variable is no longer used?
|
|
|
425 int nmethod::_zombie_instruction_size = NativeJump::instruction_size;
|
|
|
426
|
|
|
427
|
|
|
428 nmethod* nmethod::new_native_nmethod(methodHandle method,
|
|
|
429 CodeBuffer *code_buffer,
|
|
|
430 int vep_offset,
|
|
|
431 int frame_complete,
|
|
|
432 int frame_size,
|
|
|
433 ByteSize basic_lock_owner_sp_offset,
|
|
|
434 ByteSize basic_lock_sp_offset,
|
|
|
435 OopMapSet* oop_maps) {
|
|
|
436 // create nmethod
|
|
|
437 nmethod* nm = NULL;
|
|
|
438 {
|
|
|
439 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
|
|
|
440 int native_nmethod_size = allocation_size(code_buffer, sizeof(nmethod));
|
|
|
441 const int dummy = -1; // Flag to force proper "operator new"
|
|
|
442 CodeOffsets offsets;
|
|
|
443 offsets.set_value(CodeOffsets::Verified_Entry, vep_offset);
|
|
|
444 offsets.set_value(CodeOffsets::Frame_Complete, frame_complete);
|
|
|
445 nm = new (native_nmethod_size)
|
|
|
446 nmethod(method(), native_nmethod_size, &offsets,
|
|
|
447 code_buffer, frame_size,
|
|
|
448 basic_lock_owner_sp_offset, basic_lock_sp_offset,
|
|
|
449 oop_maps);
|
|
|
450 NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_native_nmethod(nm));
|
|
|
451 if (PrintAssembly && nm != NULL)
|
|
|
452 Disassembler::decode(nm);
|
|
|
453 }
|
|
|
454 // verify nmethod
|
|
|
455 debug_only(if (nm) nm->verify();) // might block
|
|
|
456
|
|
|
457 if (nm != NULL) {
|
|
|
458 nm->log_new_nmethod();
|
|
|
459 }
|
|
|
460
|
|
|
461 return nm;
|
|
|
462 }
|
|
|
463
|
|
|
464 nmethod* nmethod::new_nmethod(methodHandle method,
|
|
|
465 int compile_id,
|
|
|
466 int entry_bci,
|
|
|
467 CodeOffsets* offsets,
|
|
|
468 int orig_pc_offset,
|
|
|
469 DebugInformationRecorder* debug_info,
|
|
|
470 Dependencies* dependencies,
|
|
|
471 CodeBuffer* code_buffer, int frame_size,
|
|
|
472 OopMapSet* oop_maps,
|
|
|
473 ExceptionHandlerTable* handler_table,
|
|
|
474 ImplicitExceptionTable* nul_chk_table,
|
|
|
475 AbstractCompiler* compiler,
|
|
|
476 int comp_level
|
|
|
477 )
|
|
|
478 {
|
|
|
479 assert(debug_info->oop_recorder() == code_buffer->oop_recorder(), "shared OR");
|
|
|
480 // create nmethod
|
|
|
481 nmethod* nm = NULL;
|
|
|
482 { MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
|
|
|
483 int nmethod_size =
|
|
|
484 allocation_size(code_buffer, sizeof(nmethod))
|
|
|
485 + adjust_pcs_size(debug_info->pcs_size())
|
|
|
486 + round_to(dependencies->size_in_bytes() , oopSize)
|
|
|
487 + round_to(handler_table->size_in_bytes(), oopSize)
|
|
|
488 + round_to(nul_chk_table->size_in_bytes(), oopSize)
|
|
|
489 + round_to(debug_info->data_size() , oopSize);
|
|
|
490 nm = new (nmethod_size)
|
|
|
491 nmethod(method(), nmethod_size, compile_id, entry_bci, offsets,
|
|
|
492 orig_pc_offset, debug_info, dependencies, code_buffer, frame_size,
|
|
|
493 oop_maps,
|
|
|
494 handler_table,
|
|
|
495 nul_chk_table,
|
|
|
496 compiler,
|
|
|
497 comp_level);
|
|
|
498 if (nm != NULL) {
|
|
|
499 // To make dependency checking during class loading fast, record
|
|
|
500 // the nmethod dependencies in the classes it is dependent on.
|
|
|
501 // This allows the dependency checking code to simply walk the
|
|
|
502 // class hierarchy above the loaded class, checking only nmethods
|
|
|
503 // which are dependent on those classes. The slow way is to
|
|
|
504 // check every nmethod for dependencies which makes it linear in
|
|
|
505 // the number of methods compiled. For applications with a lot
|
|
|
506 // classes the slow way is too slow.
|
|
|
507 for (Dependencies::DepStream deps(nm); deps.next(); ) {
|
|
|
508 klassOop klass = deps.context_type();
|
|
|
509 if (klass == NULL) continue; // ignore things like evol_method
|
|
|
510
|
|
|
511 // record this nmethod as dependent on this klass
|
|
|
512 instanceKlass::cast(klass)->add_dependent_nmethod(nm);
|
|
|
513 }
|
|
|
514 }
|
|
|
515 NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_nmethod(nm));
|
|
|
516 if (PrintAssembly && nm != NULL)
|
|
|
517 Disassembler::decode(nm);
|
|
|
518 }
|
|
|
519
|
|
|
520 // verify nmethod
|
|
|
521 debug_only(if (nm) nm->verify();) // might block
|
|
|
522
|
|
|
523 if (nm != NULL) {
|
|
|
524 nm->log_new_nmethod();
|
|
|
525 }
|
|
|
526
|
|
|
527 // done
|
|
|
528 return nm;
|
|
|
529 }
|
|
|
530
|
|
|
531
|
|
|
532 // For native wrappers
|
|
|
533 nmethod::nmethod(
|
|
|
534 methodOop method,
|
|
|
535 int nmethod_size,
|
|
|
536 CodeOffsets* offsets,
|
|
|
537 CodeBuffer* code_buffer,
|
|
|
538 int frame_size,
|
|
|
539 ByteSize basic_lock_owner_sp_offset,
|
|
|
540 ByteSize basic_lock_sp_offset,
|
|
|
541 OopMapSet* oop_maps )
|
|
|
542 : CodeBlob("native nmethod", code_buffer, sizeof(nmethod),
|
|
|
543 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, oop_maps),
|
|
|
544 _compiled_synchronized_native_basic_lock_owner_sp_offset(basic_lock_owner_sp_offset),
|
|
|
545 _compiled_synchronized_native_basic_lock_sp_offset(basic_lock_sp_offset)
|
|
|
546 {
|
|
|
547 {
|
|
|
548 debug_only(No_Safepoint_Verifier nsv;)
|
|
|
549 assert_locked_or_safepoint(CodeCache_lock);
|
|
|
550
|
|
|
551 NOT_PRODUCT(_has_debug_info = false; )
|
|
|
552 _method = method;
|
|
|
553 _entry_bci = InvocationEntryBci;
|
|
|
554 _link = NULL;
|
|
|
555 _compiler = NULL;
|
|
|
556 // We have no exception handler or deopt handler make the
|
|
|
557 // values something that will never match a pc like the nmethod vtable entry
|
|
|
558 _exception_offset = 0;
|
|
|
559 _deoptimize_offset = 0;
|
|
|
560 _orig_pc_offset = 0;
|
|
|
561 _stub_offset = data_offset();
|
|
|
562 _consts_offset = data_offset();
|
|
|
563 _scopes_data_offset = data_offset();
|
|
|
564 _scopes_pcs_offset = _scopes_data_offset;
|
|
|
565 _dependencies_offset = _scopes_pcs_offset;
|
|
|
566 _handler_table_offset = _dependencies_offset;
|
|
|
567 _nul_chk_table_offset = _handler_table_offset;
|
|
|
568 _nmethod_end_offset = _nul_chk_table_offset;
|
|
|
569 _compile_id = 0; // default
|
|
|
570 _comp_level = CompLevel_none;
|
|
|
571 _entry_point = instructions_begin();
|
|
|
572 _verified_entry_point = instructions_begin() + offsets->value(CodeOffsets::Verified_Entry);
|
|
|
573 _osr_entry_point = NULL;
|
|
|
574 _exception_cache = NULL;
|
|
|
575 _pc_desc_cache.reset_to(NULL);
|
|
|
576
|
|
|
577 flags.clear();
|
|
|
578 flags.state = alive;
|
|
|
579 _markedForDeoptimization = 0;
|
|
|
580
|
|
|
581 _lock_count = 0;
|
|
|
582 _stack_traversal_mark = 0;
|
|
|
583
|
|
|
584 code_buffer->copy_oops_to(this);
|
|
|
585 debug_only(check_store();)
|
|
|
586 CodeCache::commit(this);
|
|
|
587 VTune::create_nmethod(this);
|
|
|
588 }
|
|
|
589
|
|
|
590 if (PrintNativeNMethods || PrintDebugInfo || PrintRelocations || PrintDependencies) {
|
|
|
591 ttyLocker ttyl; // keep the following output all in one block
|
|
|
592 // This output goes directly to the tty, not the compiler log.
|
|
|
593 // To enable tools to match it up with the compilation activity,
|
|
|
594 // be sure to tag this tty output with the compile ID.
|
|
|
595 if (xtty != NULL) {
|
|
|
596 xtty->begin_head("print_native_nmethod");
|
|
|
597 xtty->method(_method);
|
|
|
598 xtty->stamp();
|
|
|
599 xtty->end_head(" address='" INTPTR_FORMAT "'", (intptr_t) this);
|
|
|
600 }
|
|
|
601 // print the header part first
|
|
|
602 print();
|
|
|
603 // then print the requested information
|
|
|
604 if (PrintNativeNMethods) {
|
|
|
605 print_code();
|
|
|
606 oop_maps->print();
|
|
|
607 }
|
|
|
608 if (PrintRelocations) {
|
|
|
609 print_relocations();
|
|
|
610 }
|
|
|
611 if (xtty != NULL) {
|
|
|
612 xtty->tail("print_native_nmethod");
|
|
|
613 }
|
|
|
614 }
|
|
|
615 Events::log("Create nmethod " INTPTR_FORMAT, this);
|
|
|
616 }
|
|
|
617
|
|
|
618
|
|
|
619 void* nmethod::operator new(size_t size, int nmethod_size) {
|
|
|
620 // Always leave some room in the CodeCache for I2C/C2I adapters
|
|
|
621 if (CodeCache::unallocated_capacity() < CodeCacheMinimumFreeSpace) return NULL;
|
|
|
622 return CodeCache::allocate(nmethod_size);
|
|
|
623 }
|
|
|
624
|
|
|
625
|
|
|
626 nmethod::nmethod(
|
|
|
627 methodOop method,
|
|
|
628 int nmethod_size,
|
|
|
629 int compile_id,
|
|
|
630 int entry_bci,
|
|
|
631 CodeOffsets* offsets,
|
|
|
632 int orig_pc_offset,
|
|
|
633 DebugInformationRecorder* debug_info,
|
|
|
634 Dependencies* dependencies,
|
|
|
635 CodeBuffer *code_buffer,
|
|
|
636 int frame_size,
|
|
|
637 OopMapSet* oop_maps,
|
|
|
638 ExceptionHandlerTable* handler_table,
|
|
|
639 ImplicitExceptionTable* nul_chk_table,
|
|
|
640 AbstractCompiler* compiler,
|
|
|
641 int comp_level
|
|
|
642 )
|
|
|
643 : CodeBlob("nmethod", code_buffer, sizeof(nmethod),
|
|
|
644 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, oop_maps),
|
|
|
645 _compiled_synchronized_native_basic_lock_owner_sp_offset(in_ByteSize(-1)),
|
|
|
646 _compiled_synchronized_native_basic_lock_sp_offset(in_ByteSize(-1))
|
|
|
647 {
|
|
|
648 assert(debug_info->oop_recorder() == code_buffer->oop_recorder(), "shared OR");
|
|
|
649 {
|
|
|
650 debug_only(No_Safepoint_Verifier nsv;)
|
|
|
651 assert_locked_or_safepoint(CodeCache_lock);
|
|
|
652
|
|
|
653 NOT_PRODUCT(_has_debug_info = false; )
|
|
|
654 _method = method;
|
|
|
655 _compile_id = compile_id;
|
|
|
656 _comp_level = comp_level;
|
|
|
657 _entry_bci = entry_bci;
|
|
|
658 _link = NULL;
|
|
|
659 _compiler = compiler;
|
|
|
660 _orig_pc_offset = orig_pc_offset;
|
|
|
661 _stub_offset = instructions_offset() + code_buffer->total_offset_of(code_buffer->stubs()->start());
|
|
|
662
|
|
|
663 // Exception handler and deopt handler are in the stub section
|
|
|
664 _exception_offset = _stub_offset + offsets->value(CodeOffsets::Exceptions);
|
|
|
665 _deoptimize_offset = _stub_offset + offsets->value(CodeOffsets::Deopt);
|
|
|
666 _consts_offset = instructions_offset() + code_buffer->total_offset_of(code_buffer->consts()->start());
|
|
|
667 _scopes_data_offset = data_offset();
|
|
|
668 _scopes_pcs_offset = _scopes_data_offset + round_to(debug_info->data_size (), oopSize);
|
|
|
669 _dependencies_offset = _scopes_pcs_offset + adjust_pcs_size(debug_info->pcs_size());
|
|
|
670 _handler_table_offset = _dependencies_offset + round_to(dependencies->size_in_bytes (), oopSize);
|
|
|
671 _nul_chk_table_offset = _handler_table_offset + round_to(handler_table->size_in_bytes(), oopSize);
|
|
|
672 _nmethod_end_offset = _nul_chk_table_offset + round_to(nul_chk_table->size_in_bytes(), oopSize);
|
|
|
673
|
|
|
674 _entry_point = instructions_begin();
|
|
|
675 _verified_entry_point = instructions_begin() + offsets->value(CodeOffsets::Verified_Entry);
|
|
|
676 _osr_entry_point = instructions_begin() + offsets->value(CodeOffsets::OSR_Entry);
|
|
|
677 _exception_cache = NULL;
|
|
|
678 _pc_desc_cache.reset_to(scopes_pcs_begin());
|
|
|
679
|
|
|
680 flags.clear();
|
|
|
681 flags.state = alive;
|
|
|
682 _markedForDeoptimization = 0;
|
|
|
683
|
|
|
684 _unload_reported = false; // jvmti state
|
|
|
685
|
|
|
686 _lock_count = 0;
|
|
|
687 _stack_traversal_mark = 0;
|
|
|
688
|
|
|
689 // Copy contents of ScopeDescRecorder to nmethod
|
|
|
690 code_buffer->copy_oops_to(this);
|
|
|
691 debug_info->copy_to(this);
|
|
|
692 dependencies->copy_to(this);
|
|
|
693 debug_only(check_store();)
|
|
|
694
|
|
|
695 CodeCache::commit(this);
|
|
|
696
|
|
|
697 VTune::create_nmethod(this);
|
|
|
698
|
|
|
699 // Copy contents of ExceptionHandlerTable to nmethod
|
|
|
700 handler_table->copy_to(this);
|
|
|
701 nul_chk_table->copy_to(this);
|
|
|
702
|
|
|
703 // we use the information of entry points to find out if a method is
|
|
|
704 // static or non static
|
|
|
705 assert(compiler->is_c2() ||
|
|
|
706 _method->is_static() == (entry_point() == _verified_entry_point),
|
|
|
707 " entry points must be same for static methods and vice versa");
|
|
|
708 }
|
|
|
709
|
|
|
710 bool printnmethods = PrintNMethods || CompilerOracle::has_option_string(_method, "PrintNMethods");
|
|
|
711 if (printnmethods || PrintDebugInfo || PrintRelocations || PrintDependencies || PrintExceptionHandlers) {
|
|
|
712 print_nmethod(printnmethods);
|
|
|
713 }
|
|
|
714
|
|
|
715 // Note: Do not verify in here as the CodeCache_lock is
|
|
|
716 // taken which would conflict with the CompiledIC_lock
|
|
|
717 // which taken during the verification of call sites.
|
|
|
718 // (was bug - gri 10/25/99)
|
|
|
719
|
|
|
720 Events::log("Create nmethod " INTPTR_FORMAT, this);
|
|
|
721 }
|
|
|
722
|
|
|
723
|
|
|
724 // Print a short set of xml attributes to identify this nmethod. The
|
|
|
725 // output should be embedded in some other element.
|
|
|
726 void nmethod::log_identity(xmlStream* log) const {
|
|
|
727 log->print(" compile_id='%d'", compile_id());
|
|
|
728 const char* nm_kind = compile_kind();
|
|
|
729 if (nm_kind != NULL) log->print(" compile_kind='%s'", nm_kind);
|
|
|
730 if (compiler() != NULL) {
|
|
|
731 log->print(" compiler='%s'", compiler()->name());
|
|
|
732 }
|
|
|
733 #ifdef TIERED
|
|
|
734 log->print(" level='%d'", comp_level());
|
|
|
735 #endif // TIERED
|
|
|
736 }
|
|
|
737
|
|
|
738
|
|
|
739 #define LOG_OFFSET(log, name) \
|
|
|
740 if ((intptr_t)name##_end() - (intptr_t)name##_begin()) \
|
|
|
741 log->print(" " XSTR(name) "_offset='%d'" , \
|
|
|
742 (intptr_t)name##_begin() - (intptr_t)this)
|
|
|
743
|
|
|
744
|
|
|
745 void nmethod::log_new_nmethod() const {
|
|
|
746 if (LogCompilation && xtty != NULL) {
|
|
|
747 ttyLocker ttyl;
|
|
|
748 HandleMark hm;
|
|
|
749 xtty->begin_elem("nmethod");
|
|
|
750 log_identity(xtty);
|
|
|
751 xtty->print(" entry='" INTPTR_FORMAT "' size='%d'",
|
|
|
752 instructions_begin(), size());
|
|
|
753 xtty->print(" address='" INTPTR_FORMAT "'", (intptr_t) this);
|
|
|
754
|
|
|
755 LOG_OFFSET(xtty, relocation);
|
|
|
756 LOG_OFFSET(xtty, code);
|
|
|
757 LOG_OFFSET(xtty, stub);
|
|
|
758 LOG_OFFSET(xtty, consts);
|
|
|
759 LOG_OFFSET(xtty, scopes_data);
|
|
|
760 LOG_OFFSET(xtty, scopes_pcs);
|
|
|
761 LOG_OFFSET(xtty, dependencies);
|
|
|
762 LOG_OFFSET(xtty, handler_table);
|
|
|
763 LOG_OFFSET(xtty, nul_chk_table);
|
|
|
764 LOG_OFFSET(xtty, oops);
|
|
|
765
|
|
|
766 xtty->method(method());
|
|
|
767 xtty->stamp();
|
|
|
768 xtty->end_elem();
|
|
|
769 }
|
|
|
770 }
|
|
|
771
|
|
|
772 #undef LOG_OFFSET
|
|
|
773
|
|
|
774
|
|
|
775 // Print out more verbose output usually for a newly created nmethod.
|
|
|
776 void nmethod::print_on(outputStream* st, const char* title) const {
|
|
|
777 if (st != NULL) {
|
|
|
778 ttyLocker ttyl;
|
|
|
779 // Print a little tag line that looks like +PrintCompilation output:
|
|
|
780 st->print("%3d%c %s",
|
|
|
781 compile_id(),
|
|
|
782 is_osr_method() ? '%' :
|
|
|
783 method() != NULL &&
|
|
|
784 is_native_method() ? 'n' : ' ',
|
|
|
785 title);
|
|
|
786 #ifdef TIERED
|
|
|
787 st->print(" (%d) ", comp_level());
|
|
|
788 #endif // TIERED
|
|
|
789 if (WizardMode) st->print(" (" INTPTR_FORMAT ")", this);
|
|
|
790 if (method() != NULL) {
|
|
|
791 method()->print_short_name(st);
|
|
|
792 if (is_osr_method())
|
|
|
793 st->print(" @ %d", osr_entry_bci());
|
|
|
794 if (method()->code_size() > 0)
|
|
|
795 st->print(" (%d bytes)", method()->code_size());
|
|
|
796 }
|
|
|
797 }
|
|
|
798 }
|
|
|
799
|
|
|
800
|
|
|
801 #ifndef PRODUCT
|
|
|
802 void nmethod::print_nmethod(bool printmethod) {
|
|
|
803 ttyLocker ttyl; // keep the following output all in one block
|
|
|
804 if (xtty != NULL) {
|
|
|
805 xtty->begin_head("print_nmethod");
|
|
|
806 xtty->stamp();
|
|
|
807 xtty->end_head();
|
|
|
808 }
|
|
|
809 // print the header part first
|
|
|
810 print();
|
|
|
811 // then print the requested information
|
|
|
812 if (printmethod) {
|
|
|
813 print_code();
|
|
|
814 print_pcs();
|
|
|
815 oop_maps()->print();
|
|
|
816 }
|
|
|
817 if (PrintDebugInfo) {
|
|
|
818 print_scopes();
|
|
|
819 }
|
|
|
820 if (PrintRelocations) {
|
|
|
821 print_relocations();
|
|
|
822 }
|
|
|
823 if (PrintDependencies) {
|
|
|
824 print_dependencies();
|
|
|
825 }
|
|
|
826 if (PrintExceptionHandlers) {
|
|
|
827 print_handler_table();
|
|
|
828 print_nul_chk_table();
|
|
|
829 }
|
|
|
830 if (xtty != NULL) {
|
|
|
831 xtty->tail("print_nmethod");
|
|
|
832 }
|
|
|
833 }
|
|
|
834 #endif
|
|
|
835
|
|
|
836
|
|
|
837 void nmethod::set_version(int v) {
|
|
|
838 flags.version = v;
|
|
|
839 }
|
|
|
840
|
|
|
841
|
|
|
842 ScopeDesc* nmethod::scope_desc_at(address pc) {
|
|
|
843 PcDesc* pd = pc_desc_at(pc);
|
|
|
844 guarantee(pd != NULL, "scope must be present");
|
|
|
845 return new ScopeDesc(this, pd->scope_decode_offset(),
|
|
|
846 pd->obj_decode_offset());
|
|
|
847 }
|
|
|
848
|
|
|
849
|
|
|
850 void nmethod::clear_inline_caches() {
|
|
|
851 assert(SafepointSynchronize::is_at_safepoint(), "cleaning of IC's only allowed at safepoint");
|
|
|
852 if (is_zombie()) {
|
|
|
853 return;
|
|
|
854 }
|
|
|
855
|
|
|
856 RelocIterator iter(this);
|
|
|
857 while (iter.next()) {
|
|
|
858 iter.reloc()->clear_inline_cache();
|
|
|
859 }
|
|
|
860 }
|
|
|
861
|
|
|
862
|
|
|
863 void nmethod::cleanup_inline_caches() {
|
|
|
864
|
|
|
865 assert(SafepointSynchronize::is_at_safepoint() &&
|
|
|
866 !CompiledIC_lock->is_locked() &&
|
|
|
867 !Patching_lock->is_locked(), "no threads must be updating the inline caches by them selfs");
|
|
|
868
|
|
|
869 // If the method is not entrant or zombie then a JMP is plastered over the
|
|
|
870 // first few bytes. If an oop in the old code was there, that oop
|
|
|
871 // should not get GC'd. Skip the first few bytes of oops on
|
|
|
872 // not-entrant methods.
|
|
|
873 address low_boundary = verified_entry_point();
|
|
|
874 if (!is_in_use()) {
|
|
|
875 low_boundary += NativeJump::instruction_size;
|
|
|
876 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump.
|
|
|
877 // This means that the low_boundary is going to be a little too high.
|
|
|
878 // This shouldn't matter, since oops of non-entrant methods are never used.
|
|
|
879 // In fact, why are we bothering to look at oops in a non-entrant method??
|
|
|
880 }
|
|
|
881
|
|
|
882 // Find all calls in an nmethod, and clear the ones that points to zombie methods
|
|
|
883 ResourceMark rm;
|
|
|
884 RelocIterator iter(this, low_boundary);
|
|
|
885 while(iter.next()) {
|
|
|
886 switch(iter.type()) {
|
|
|
887 case relocInfo::virtual_call_type:
|
|
|
888 case relocInfo::opt_virtual_call_type: {
|
|
|
889 CompiledIC *ic = CompiledIC_at(iter.reloc());
|
|
|
890 // Ok, to lookup references to zombies here
|
|
|
891 CodeBlob *cb = CodeCache::find_blob_unsafe(ic->ic_destination());
|
|
|
892 if( cb != NULL && cb->is_nmethod() ) {
|
|
|
893 nmethod* nm = (nmethod*)cb;
|
|
|
894 // Clean inline caches pointing to both zombie and not_entrant methods
|
|
|
895 if (!nm->is_in_use()) ic->set_to_clean();
|
|
|
896 }
|
|
|
897 break;
|
|
|
898 }
|
|
|
899 case relocInfo::static_call_type: {
|
|
|
900 CompiledStaticCall *csc = compiledStaticCall_at(iter.reloc());
|
|
|
901 CodeBlob *cb = CodeCache::find_blob_unsafe(csc->destination());
|
|
|
902 if( cb != NULL && cb->is_nmethod() ) {
|
|
|
903 nmethod* nm = (nmethod*)cb;
|
|
|
904 // Clean inline caches pointing to both zombie and not_entrant methods
|
|
|
905 if (!nm->is_in_use()) csc->set_to_clean();
|
|
|
906 }
|
|
|
907 break;
|
|
|
908 }
|
|
|
909 }
|
|
|
910 }
|
|
|
911 }
|
|
|
912
|
|
|
913 void nmethod::mark_as_seen_on_stack() {
|
|
|
914 assert(is_not_entrant(), "must be a non-entrant method");
|
|
|
915 set_stack_traversal_mark(NMethodSweeper::traversal_count());
|
|
|
916 }
|
|
|
917
|
|
|
918 // Tell if a non-entrant method can be converted to a zombie (i.e., there is no activations on the stack)
|
|
|
919 bool nmethod::can_not_entrant_be_converted() {
|
|
|
920 assert(is_not_entrant(), "must be a non-entrant method");
|
|
|
921 assert(SafepointSynchronize::is_at_safepoint(), "must be called during a safepoint");
|
|
|
922
|
|
|
923 // Since the nmethod sweeper only does partial sweep the sweeper's traversal
|
|
|
924 // count can be greater than the stack traversal count before it hits the
|
|
|
925 // nmethod for the second time.
|
|
|
926 return stack_traversal_mark()+1 < NMethodSweeper::traversal_count();
|
|
|
927 }
|
|
|
928
|
|
|
929 void nmethod::inc_decompile_count() {
|
|
|
930 // Could be gated by ProfileTraps, but do not bother...
|
|
|
931 methodOop m = method();
|
|
|
932 if (m == NULL) return;
|
|
|
933 methodDataOop mdo = m->method_data();
|
|
|
934 if (mdo == NULL) return;
|
|
|
935 // There is a benign race here. See comments in methodDataOop.hpp.
|
|
|
936 mdo->inc_decompile_count();
|
|
|
937 }
|
|
|
938
|
|
|
939 void nmethod::make_unloaded(BoolObjectClosure* is_alive, oop cause) {
|
|
|
940
|
|
|
941 post_compiled_method_unload();
|
|
|
942
|
|
|
943 // Since this nmethod is being unloaded, make sure that dependencies
|
|
|
944 // recorded in instanceKlasses get flushed and pass non-NULL closure to
|
|
|
945 // indicate that this work is being done during a GC.
|
|
|
946 assert(Universe::heap()->is_gc_active(), "should only be called during gc");
|
|
|
947 assert(is_alive != NULL, "Should be non-NULL");
|
|
|
948 // A non-NULL is_alive closure indicates that this is being called during GC.
|
|
|
949 flush_dependencies(is_alive);
|
|
|
950
|
|
|
951 // Break cycle between nmethod & method
|
|
|
952 if (TraceClassUnloading && WizardMode) {
|
|
|
953 tty->print_cr("[Class unloading: Making nmethod " INTPTR_FORMAT
|
|
|
954 " unloadable], methodOop(" INTPTR_FORMAT
|
|
|
955 "), cause(" INTPTR_FORMAT ")",
|
|
|
956 this, (address)_method, (address)cause);
|
|
|
957 cause->klass()->print();
|
|
|
958 }
|
|
|
959 // If _method is already NULL the methodOop is about to be unloaded,
|
|
|
960 // so we don't have to break the cycle. Note that it is possible to
|
|
|
961 // have the methodOop live here, in case we unload the nmethod because
|
|
|
962 // it is pointing to some oop (other than the methodOop) being unloaded.
|
|
|
963 if (_method != NULL) {
|
|
|
964 // OSR methods point to the methodOop, but the methodOop does not
|
|
|
965 // point back!
|
|
|
966 if (_method->code() == this) {
|
|
|
967 _method->clear_code(); // Break a cycle
|
|
|
968 }
|
|
|
969 inc_decompile_count(); // Last chance to make a mark on the MDO
|
|
|
970 _method = NULL; // Clear the method of this dead nmethod
|
|
|
971 }
|
|
|
972 // Make the class unloaded - i.e., change state and notify sweeper
|
|
|
973 check_safepoint();
|
|
|
974 if (is_in_use()) {
|
|
|
975 // Transitioning directly from live to unloaded -- so
|
|
|
976 // we need to force a cache clean-up; remember this
|
|
|
977 // for later on.
|
|
|
978 CodeCache::set_needs_cache_clean(true);
|
|
|
979 }
|
|
|
980 flags.state = unloaded;
|
|
|
981
|
|
|
982 // The methodOop is gone at this point
|
|
|
983 assert(_method == NULL, "Tautology");
|
|
|
984
|
|
|
985 set_link(NULL);
|
|
|
986 NMethodSweeper::notify(this);
|
|
|
987 }
|
|
|
988
|
|
|
989 void nmethod::invalidate_osr_method() {
|
|
|
990 assert(_entry_bci != InvocationEntryBci, "wrong kind of nmethod");
|
|
|
991 if (_entry_bci != InvalidOSREntryBci)
|
|
|
992 inc_decompile_count();
|
|
|
993 // Remove from list of active nmethods
|
|
|
994 if (method() != NULL)
|
|
|
995 instanceKlass::cast(method()->method_holder())->remove_osr_nmethod(this);
|
|
|
996 // Set entry as invalid
|
|
|
997 _entry_bci = InvalidOSREntryBci;
|
|
|
998 }
|
|
|
999
|
|
|
1000 void nmethod::log_state_change(int state) const {
|
|
|
1001 if (LogCompilation) {
|
|
|
1002 if (xtty != NULL) {
|
|
|
1003 ttyLocker ttyl; // keep the following output all in one block
|
|
|
1004 xtty->begin_elem("make_not_entrant %sthread='" UINTX_FORMAT "'",
|
|
|
1005 (state == zombie ? "zombie='1' " : ""),
|
|
|
1006 os::current_thread_id());
|
|
|
1007 log_identity(xtty);
|
|
|
1008 xtty->stamp();
|
|
|
1009 xtty->end_elem();
|
|
|
1010 }
|
|
|
1011 }
|
|
|
1012 if (PrintCompilation) {
|
|
|
1013 print_on(tty, state == zombie ? "made zombie " : "made not entrant ");
|
|
|
1014 tty->cr();
|
|
|
1015 }
|
|
|
1016 }
|
|
|
1017
|
|
|
1018 // Common functionality for both make_not_entrant and make_zombie
|
|
|
1019 void nmethod::make_not_entrant_or_zombie(int state) {
|
|
|
1020 assert(state == zombie || state == not_entrant, "must be zombie or not_entrant");
|
|
|
1021
|
|
|
1022 // Code for an on-stack-replacement nmethod is removed when a class gets unloaded.
|
|
|
1023 // They never become zombie/non-entrant, so the nmethod sweeper will never remove
|
|
|
1024 // them. Instead the entry_bci is set to InvalidOSREntryBci, so the osr nmethod
|
|
|
1025 // will never be used anymore. That the nmethods only gets removed when class unloading
|
|
|
1026 // happens, make life much simpler, since the nmethods are not just going to disappear
|
|
|
1027 // out of the blue.
|
|
|
1028 if (is_osr_only_method()) {
|
|
|
1029 if (osr_entry_bci() != InvalidOSREntryBci) {
|
|
|
1030 // only log this once
|
|
|
1031 log_state_change(state);
|
|
|
1032 }
|
|
|
1033 invalidate_osr_method();
|
|
|
1034 return;
|
|
|
1035 }
|
|
|
1036
|
|
|
1037 // If the method is already zombie or set to the state we want, nothing to do
|
|
|
1038 if (is_zombie() || (state == not_entrant && is_not_entrant())) {
|
|
|
1039 return;
|
|
|
1040 }
|
|
|
1041
|
|
|
1042 log_state_change(state);
|
|
|
1043
|
|
|
1044 // Make sure the nmethod is not flushed in case of a safepoint in code below.
|
|
|
1045 nmethodLocker nml(this);
|
|
|
1046
|
|
|
1047 {
|
|
|
1048 // Enter critical section. Does not block for safepoint.
|
|
|
1049 MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag);
|
|
|
1050 // The caller can be calling the method statically or through an inline
|
|
|
1051 // cache call.
|
|
|
1052 if (!is_not_entrant()) {
|
|
|
1053 NativeJump::patch_verified_entry(entry_point(), verified_entry_point(),
|
|
|
1054 SharedRuntime::get_handle_wrong_method_stub());
|
|
|
1055 assert (NativeJump::instruction_size == nmethod::_zombie_instruction_size, "");
|
|
|
1056 }
|
|
|
1057
|
|
|
1058 // When the nmethod becomes zombie it is no longer alive so the
|
|
|
1059 // dependencies must be flushed. nmethods in the not_entrant
|
|
|
1060 // state will be flushed later when the transition to zombie
|
|
|
1061 // happens or they get unloaded.
|
|
|
1062 if (state == zombie) {
|
|
|
1063 assert(SafepointSynchronize::is_at_safepoint(), "must be done at safepoint");
|
|
|
1064 flush_dependencies(NULL);
|
|
|
1065 } else {
|
|
|
1066 assert(state == not_entrant, "other cases may need to be handled differently");
|
|
|
1067 }
|
|
|
1068
|
|
|
1069 // Change state
|
|
|
1070 flags.state = state;
|
|
|
1071 } // leave critical region under Patching_lock
|
|
|
1072
|
|
|
1073 if (state == not_entrant) {
|
|
|
1074 Events::log("Make nmethod not entrant " INTPTR_FORMAT, this);
|
|
|
1075 } else {
|
|
|
1076 Events::log("Make nmethod zombie " INTPTR_FORMAT, this);
|
|
|
1077 }
|
|
|
1078
|
|
|
1079 if (TraceCreateZombies) {
|
|
|
1080 tty->print_cr("nmethod <" INTPTR_FORMAT "> code made %s", this, (state == not_entrant) ? "not entrant" : "zombie");
|
|
|
1081 }
|
|
|
1082
|
|
|
1083 // Make sweeper aware that there is a zombie method that needs to be removed
|
|
|
1084 NMethodSweeper::notify(this);
|
|
|
1085
|
|
|
1086 // not_entrant only stuff
|
|
|
1087 if (state == not_entrant) {
|
|
|
1088 mark_as_seen_on_stack();
|
|
|
1089 }
|
|
|
1090
|
|
|
1091 // It's a true state change, so mark the method as decompiled.
|
|
|
1092 inc_decompile_count();
|
|
|
1093
|
|
|
1094
|
|
|
1095 // zombie only - if a JVMTI agent has enabled the CompiledMethodUnload event
|
|
|
1096 // and it hasn't already been reported for this nmethod then report it now.
|
|
|
1097 // (the event may have been reported earilier if the GC marked it for unloading).
|
|
|
1098 if (state == zombie) {
|
|
|
1099
|
|
|
1100 DTRACE_METHOD_UNLOAD_PROBE(method());
|
|
|
1101
|
|
|
1102 if (JvmtiExport::should_post_compiled_method_unload() &&
|
|
|
1103 !unload_reported()) {
|
|
|
1104 assert(method() != NULL, "checking");
|
|
|
1105 {
|
|
|
1106 HandleMark hm;
|
|
|
1107 JvmtiExport::post_compiled_method_unload_at_safepoint(
|
|
|
1108 method()->jmethod_id(), code_begin());
|
|
|
1109 }
|
|
|
1110 set_unload_reported();
|
|
|
1111 }
|
|
|
1112 }
|
|
|
1113
|
|
|
1114
|
|
|
1115 // Zombie only stuff
|
|
|
1116 if (state == zombie) {
|
|
|
1117 VTune::delete_nmethod(this);
|
|
|
1118 }
|
|
|
1119
|
|
|
1120 // Check whether method got unloaded at a safepoint before this,
|
|
|
1121 // if so we can skip the flushing steps below
|
|
|
1122 if (method() == NULL) return;
|
|
|
1123
|
|
|
1124 // Remove nmethod from method.
|
|
|
1125 // We need to check if both the _code and _from_compiled_code_entry_point
|
|
|
1126 // refer to this nmethod because there is a race in setting these two fields
|
|
|
1127 // in methodOop as seen in bugid 4947125.
|
|
|
1128 // If the vep() points to the zombie nmethod, the memory for the nmethod
|
|
|
1129 // could be flushed and the compiler and vtable stubs could still call
|
|
|
1130 // through it.
|
|
|
1131 if (method()->code() == this ||
|
|
|
1132 method()->from_compiled_entry() == verified_entry_point()) {
|
|
|
1133 HandleMark hm;
|
|
|
1134 method()->clear_code();
|
|
|
1135 }
|
|
|
1136 }
|
|
|
1137
|
|
|
1138
|
|
|
1139 #ifndef PRODUCT
|
|
|
1140 void nmethod::check_safepoint() {
|
|
|
1141 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
|
|
|
1142 }
|
|
|
1143 #endif
|
|
|
1144
|
|
|
1145
|
|
|
1146 void nmethod::flush() {
|
|
|
1147 // Note that there are no valid oops in the nmethod anymore.
|
|
|
1148 assert(is_zombie() || (is_osr_method() && is_unloaded()), "must be a zombie method");
|
|
|
1149 assert(is_marked_for_reclamation() || (is_osr_method() && is_unloaded()), "must be marked for reclamation");
|
|
|
1150
|
|
|
1151 assert (!is_locked_by_vm(), "locked methods shouldn't be flushed");
|
|
|
1152 check_safepoint();
|
|
|
1153
|
|
|
1154 // completely deallocate this method
|
|
|
1155 EventMark m("flushing nmethod " INTPTR_FORMAT " %s", this, "");
|
|
|
1156 if (PrintMethodFlushing) {
|
|
|
1157 tty->print_cr("*flushing nmethod " INTPTR_FORMAT ". Live blobs: %d", this, CodeCache::nof_blobs());
|
|
|
1158 }
|
|
|
1159
|
|
|
1160 // We need to deallocate any ExceptionCache data.
|
|
|
1161 // Note that we do not need to grab the nmethod lock for this, it
|
|
|
1162 // better be thread safe if we're disposing of it!
|
|
|
1163 ExceptionCache* ec = exception_cache();
|
|
|
1164 set_exception_cache(NULL);
|
|
|
1165 while(ec != NULL) {
|
|
|
1166 ExceptionCache* next = ec->next();
|
|
|
1167 delete ec;
|
|
|
1168 ec = next;
|
|
|
1169 }
|
|
|
1170
|
|
|
1171 ((CodeBlob*)(this))->flush();
|
|
|
1172
|
|
|
1173 CodeCache::free(this);
|
|
|
1174 }
|
|
|
1175
|
|
|
1176
|
|
|
1177 //
|
|
|
1178 // Notify all classes this nmethod is dependent on that it is no
|
|
|
1179 // longer dependent. This should only be called in two situations.
|
|
|
1180 // First, when a nmethod transitions to a zombie all dependents need
|
|
|
1181 // to be clear. Since zombification happens at a safepoint there's no
|
|
|
1182 // synchronization issues. The second place is a little more tricky.
|
|
|
1183 // During phase 1 of mark sweep class unloading may happen and as a
|
|
|
1184 // result some nmethods may get unloaded. In this case the flushing
|
|
|
1185 // of dependencies must happen during phase 1 since after GC any
|
|
|
1186 // dependencies in the unloaded nmethod won't be updated, so
|
|
|
1187 // traversing the dependency information in unsafe. In that case this
|
|
|
1188 // function is called with a non-NULL argument and this function only
|
|
|
1189 // notifies instanceKlasses that are reachable
|
|
|
1190
|
|
|
1191 void nmethod::flush_dependencies(BoolObjectClosure* is_alive) {
|
|
|
1192 assert(SafepointSynchronize::is_at_safepoint(), "must be done at safepoint");
|
|
|
1193 assert(Universe::heap()->is_gc_active() == (is_alive != NULL),
|
|
|
1194 "is_alive is non-NULL if and only if we are called during GC");
|
|
|
1195 if (!has_flushed_dependencies()) {
|
|
|
1196 set_has_flushed_dependencies();
|
|
|
1197 for (Dependencies::DepStream deps(this); deps.next(); ) {
|
|
|
1198 klassOop klass = deps.context_type();
|
|
|
1199 if (klass == NULL) continue; // ignore things like evol_method
|
|
|
1200
|
|
|
1201 // During GC the is_alive closure is non-NULL, and is used to
|
|
|
1202 // determine liveness of dependees that need to be updated.
|
|
|
1203 if (is_alive == NULL || is_alive->do_object_b(klass)) {
|
|
|
1204 instanceKlass::cast(klass)->remove_dependent_nmethod(this);
|
|
|
1205 }
|
|
|
1206 }
|
|
|
1207 }
|
|
|
1208 }
|
|
|
1209
|
|
|
1210
|
|
|
1211 // If this oop is not live, the nmethod can be unloaded.
|
|
|
1212 bool nmethod::can_unload(BoolObjectClosure* is_alive,
|
|
|
1213 OopClosure* keep_alive,
|
|
|
1214 oop* root, bool unloading_occurred) {
|
|
|
1215 assert(root != NULL, "just checking");
|
|
|
1216 oop obj = *root;
|
|
|
1217 if (obj == NULL || is_alive->do_object_b(obj)) {
|
|
|
1218 return false;
|
|
|
1219 }
|
|
|
1220 if (obj->is_compiledICHolder()) {
|
|
|
1221 compiledICHolderOop cichk_oop = compiledICHolderOop(obj);
|
|
|
1222 if (is_alive->do_object_b(
|
|
|
1223 cichk_oop->holder_method()->method_holder()) &&
|
|
|
1224 is_alive->do_object_b(cichk_oop->holder_klass())) {
|
|
|
1225 // The oop should be kept alive
|
|
|
1226 keep_alive->do_oop(root);
|
|
|
1227 return false;
|
|
|
1228 }
|
|
|
1229 }
|
|
|
1230 if (!UseParallelOldGC || !VerifyParallelOldWithMarkSweep) {
|
|
|
1231 // Cannot do this test if verification of the UseParallelOldGC
|
|
|
1232 // code using the PSMarkSweep code is being done.
|
|
|
1233 assert(unloading_occurred, "Inconsistency in unloading");
|
|
|
1234 }
|
|
|
1235 make_unloaded(is_alive, obj);
|
|
|
1236 return true;
|
|
|
1237 }
|
|
|
1238
|
|
|
1239 // ------------------------------------------------------------------
|
|
|
1240 // post_compiled_method_load_event
|
|
|
1241 // new method for install_code() path
|
|
|
1242 // Transfer information from compilation to jvmti
|
|
|
1243 void nmethod::post_compiled_method_load_event() {
|
|
|
1244
|
|
|
1245 methodOop moop = method();
|
|
|
1246 HS_DTRACE_PROBE8(hotspot, compiled__method__load,
|
|
|
1247 moop->klass_name()->bytes(),
|
|
|
1248 moop->klass_name()->utf8_length(),
|
|
|
1249 moop->name()->bytes(),
|
|
|
1250 moop->name()->utf8_length(),
|
|
|
1251 moop->signature()->bytes(),
|
|
|
1252 moop->signature()->utf8_length(),
|
|
|
1253 code_begin(), code_size());
|
|
|
1254
|
|
|
1255 if (JvmtiExport::should_post_compiled_method_load()) {
|
|
|
1256 JvmtiExport::post_compiled_method_load(this);
|
|
|
1257 }
|
|
|
1258 }
|
|
|
1259
|
|
|
1260 void nmethod::post_compiled_method_unload() {
|
|
|
1261 assert(_method != NULL && !is_unloaded(), "just checking");
|
|
|
1262 DTRACE_METHOD_UNLOAD_PROBE(method());
|
|
|
1263
|
|
|
1264 // If a JVMTI agent has enabled the CompiledMethodUnload event then
|
|
|
1265 // post the event. Sometime later this nmethod will be made a zombie by
|
|
|
1266 // the sweeper but the methodOop will not be valid at that point.
|
|
|
1267 if (JvmtiExport::should_post_compiled_method_unload()) {
|
|
|
1268 assert(!unload_reported(), "already unloaded");
|
|
|
1269 HandleMark hm;
|
|
|
1270 JvmtiExport::post_compiled_method_unload_at_safepoint(
|
|
|
1271 method()->jmethod_id(), code_begin());
|
|
|
1272 }
|
|
|
1273
|
|
|
1274 // The JVMTI CompiledMethodUnload event can be enabled or disabled at
|
|
|
1275 // any time. As the nmethod is being unloaded now we mark it has
|
|
|
1276 // having the unload event reported - this will ensure that we don't
|
|
|
1277 // attempt to report the event in the unlikely scenario where the
|
|
|
1278 // event is enabled at the time the nmethod is made a zombie.
|
|
|
1279 set_unload_reported();
|
|
|
1280 }
|
|
|
1281
|
|
|
1282 // This is called at the end of the strong tracing/marking phase of a
|
|
|
1283 // GC to unload an nmethod if it contains otherwise unreachable
|
|
|
1284 // oops.
|
|
|
1285
|
|
|
1286 void nmethod::do_unloading(BoolObjectClosure* is_alive,
|
|
|
1287 OopClosure* keep_alive, bool unloading_occurred) {
|
|
|
1288 // Make sure the oop's ready to receive visitors
|
|
|
1289 assert(!is_zombie() && !is_unloaded(),
|
|
|
1290 "should not call follow on zombie or unloaded nmethod");
|
|
|
1291
|
|
|
1292 // If the method is not entrant then a JMP is plastered over the
|
|
|
1293 // first few bytes. If an oop in the old code was there, that oop
|
|
|
1294 // should not get GC'd. Skip the first few bytes of oops on
|
|
|
1295 // not-entrant methods.
|
|
|
1296 address low_boundary = verified_entry_point();
|
|
|
1297 if (is_not_entrant()) {
|
|
|
1298 low_boundary += NativeJump::instruction_size;
|
|
|
1299 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump.
|
|
|
1300 // (See comment above.)
|
|
|
1301 }
|
|
|
1302
|
|
|
1303 // The RedefineClasses() API can cause the class unloading invariant
|
|
|
1304 // to no longer be true. See jvmtiExport.hpp for details.
|
|
|
1305 // Also, leave a debugging breadcrumb in local flag.
|
|
|
1306 bool a_class_was_redefined = JvmtiExport::has_redefined_a_class();
|
|
|
1307 if (a_class_was_redefined) {
|
|
|
1308 // This set of the unloading_occurred flag is done before the
|
|
|
1309 // call to post_compiled_method_unload() so that the unloading
|
|
|
1310 // of this nmethod is reported.
|
|
|
1311 unloading_occurred = true;
|
|
|
1312 }
|
|
|
1313
|
|
|
1314 // Follow methodOop
|
|
|
1315 if (can_unload(is_alive, keep_alive, (oop*)&_method, unloading_occurred)) {
|
|
|
1316 return;
|
|
|
1317 }
|
|
|
1318
|
|
|
1319 // Exception cache
|
|
|
1320 ExceptionCache* ec = exception_cache();
|
|
|
1321 while (ec != NULL) {
|
|
|
1322 oop* ex_addr = (oop*)ec->exception_type_addr();
|
|
|
1323 oop ex = *ex_addr;
|
|
|
1324 ExceptionCache* next_ec = ec->next();
|
|
|
1325 if (ex != NULL && !is_alive->do_object_b(ex)) {
|
|
|
1326 assert(!ex->is_compiledICHolder(), "Possible error here");
|
|
|
1327 remove_from_exception_cache(ec);
|
|
|
1328 }
|
|
|
1329 ec = next_ec;
|
|
|
1330 }
|
|
|
1331
|
|
|
1332 // If class unloading occurred we first iterate over all inline caches and
|
|
|
1333 // clear ICs where the cached oop is referring to an unloaded klass or method.
|
|
|
1334 // The remaining live cached oops will be traversed in the relocInfo::oop_type
|
|
|
1335 // iteration below.
|
|
|
1336 if (unloading_occurred) {
|
|
|
1337 RelocIterator iter(this, low_boundary);
|
|
|
1338 while(iter.next()) {
|
|
|
1339 if (iter.type() == relocInfo::virtual_call_type) {
|
|
|
1340 CompiledIC *ic = CompiledIC_at(iter.reloc());
|
|
|
1341 oop ic_oop = ic->cached_oop();
|
|
|
1342 if (ic_oop != NULL && !is_alive->do_object_b(ic_oop)) {
|
|
|
1343 // The only exception is compiledICHolder oops which may
|
|
|
1344 // yet be marked below. (We check this further below).
|
|
|
1345 if (ic_oop->is_compiledICHolder()) {
|
|
|
1346 compiledICHolderOop cichk_oop = compiledICHolderOop(ic_oop);
|
|
|
1347 if (is_alive->do_object_b(
|
|
|
1348 cichk_oop->holder_method()->method_holder()) &&
|
|
|
1349 is_alive->do_object_b(cichk_oop->holder_klass())) {
|
|
|
1350 continue;
|
|
|
1351 }
|
|
|
1352 }
|
|
|
1353 ic->set_to_clean();
|
|
|
1354 assert(ic->cached_oop() == NULL, "cached oop in IC should be cleared")
|
|
|
1355 }
|
|
|
1356 }
|
|
|
1357 }
|
|
|
1358 }
|
|
|
1359
|
|
|
1360 // Compiled code
|
|
|
1361 RelocIterator iter(this, low_boundary);
|
|
|
1362 while (iter.next()) {
|
|
|
1363 if (iter.type() == relocInfo::oop_type) {
|
|
|
1364 oop_Relocation* r = iter.oop_reloc();
|
|
|
1365 // In this loop, we must only traverse those oops directly embedded in
|
|
|
1366 // the code. Other oops (oop_index>0) are seen as part of scopes_oops.
|
|
|
1367 assert(1 == (r->oop_is_immediate()) +
|
|
|
1368 (r->oop_addr() >= oops_begin() && r->oop_addr() < oops_end()),
|
|
|
1369 "oop must be found in exactly one place");
|
|
|
1370 if (r->oop_is_immediate() && r->oop_value() != NULL) {
|
|
|
1371 if (can_unload(is_alive, keep_alive, r->oop_addr(), unloading_occurred)) {
|
|
|
1372 return;
|
|
|
1373 }
|
|
|
1374 }
|
|
|
1375 }
|
|
|
1376 }
|
|
|
1377
|
|
|
1378
|
|
|
1379 // Scopes
|
|
|
1380 for (oop* p = oops_begin(); p < oops_end(); p++) {
|
|
|
1381 if (*p == Universe::non_oop_word()) continue; // skip non-oops
|
|
|
1382 if (can_unload(is_alive, keep_alive, p, unloading_occurred)) {
|
|
|
1383 return;
|
|
|
1384 }
|
|
|
1385 }
|
|
|
1386
|
|
|
1387 #ifndef PRODUCT
|
|
|
1388 // This nmethod was not unloaded; check below that all CompiledICs
|
|
|
1389 // refer to marked oops.
|
|
|
1390 {
|
|
|
1391 RelocIterator iter(this, low_boundary);
|
|
|
1392 while (iter.next()) {
|
|
|
1393 if (iter.type() == relocInfo::virtual_call_type) {
|
|
|
1394 CompiledIC *ic = CompiledIC_at(iter.reloc());
|
|
|
1395 oop ic_oop = ic->cached_oop();
|
|
|
1396 assert(ic_oop == NULL || is_alive->do_object_b(ic_oop),
|
|
|
1397 "Found unmarked ic_oop in reachable nmethod");
|
|
|
1398 }
|
|
|
1399 }
|
|
|
1400 }
|
|
|
1401 #endif // !PRODUCT
|
|
|
1402 }
|
|
|
1403
|
|
|
1404 void nmethod::oops_do(OopClosure* f) {
|
|
|
1405 // make sure the oops ready to receive visitors
|
|
|
1406 assert(!is_zombie() && !is_unloaded(),
|
|
|
1407 "should not call follow on zombie or unloaded nmethod");
|
|
|
1408
|
|
|
1409 // If the method is not entrant or zombie then a JMP is plastered over the
|
|
|
1410 // first few bytes. If an oop in the old code was there, that oop
|
|
|
1411 // should not get GC'd. Skip the first few bytes of oops on
|
|
|
1412 // not-entrant methods.
|
|
|
1413 address low_boundary = verified_entry_point();
|
|
|
1414 if (is_not_entrant()) {
|
|
|
1415 low_boundary += NativeJump::instruction_size;
|
|
|
1416 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump.
|
|
|
1417 // (See comment above.)
|
|
|
1418 }
|
|
|
1419
|
|
|
1420 // Compiled code
|
|
|
1421 f->do_oop((oop*) &_method);
|
|
|
1422 ExceptionCache* ec = exception_cache();
|
|
|
1423 while(ec != NULL) {
|
|
|
1424 f->do_oop((oop*)ec->exception_type_addr());
|
|
|
1425 ec = ec->next();
|
|
|
1426 }
|
|
|
1427
|
|
|
1428 RelocIterator iter(this, low_boundary);
|
|
|
1429 while (iter.next()) {
|
|
|
1430 if (iter.type() == relocInfo::oop_type ) {
|
|
|
1431 oop_Relocation* r = iter.oop_reloc();
|
|
|
1432 // In this loop, we must only follow those oops directly embedded in
|
|
|
1433 // the code. Other oops (oop_index>0) are seen as part of scopes_oops.
|
|
|
1434 assert(1 == (r->oop_is_immediate()) + (r->oop_addr() >= oops_begin() && r->oop_addr() < oops_end()), "oop must be found in exactly one place");
|
|
|
1435 if (r->oop_is_immediate() && r->oop_value() != NULL) {
|
|
|
1436 f->do_oop(r->oop_addr());
|
|
|
1437 }
|
|
|
1438 }
|
|
|
1439 }
|
|
|
1440
|
|
|
1441 // Scopes
|
|
|
1442 for (oop* p = oops_begin(); p < oops_end(); p++) {
|
|
|
1443 if (*p == Universe::non_oop_word()) continue; // skip non-oops
|
|
|
1444 f->do_oop(p);
|
|
|
1445 }
|
|
|
1446 }
|
|
|
1447
|
|
|
1448 // Method that knows how to preserve outgoing arguments at call. This method must be
|
|
|
1449 // called with a frame corresponding to a Java invoke
|
|
|
1450 void nmethod::preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) {
|
|
|
1451 if (!method()->is_native()) {
|
|
|
1452 SimpleScopeDesc ssd(this, fr.pc());
|
|
|
1453 Bytecode_invoke* call = Bytecode_invoke_at(ssd.method(), ssd.bci());
|
|
|
1454 bool is_static = call->is_invokestatic();
|
|
|
1455 symbolOop signature = call->signature();
|
|
|
1456 fr.oops_compiled_arguments_do(signature, is_static, reg_map, f);
|
|
|
1457 }
|
|
|
1458 }
|
|
|
1459
|
|
|
1460
|
|
|
1461 oop nmethod::embeddedOop_at(u_char* p) {
|
|
|
1462 RelocIterator iter(this, p, p + oopSize);
|
|
|
1463 while (iter.next())
|
|
|
1464 if (iter.type() == relocInfo::oop_type) {
|
|
|
1465 return iter.oop_reloc()->oop_value();
|
|
|
1466 }
|
|
|
1467 return NULL;
|
|
|
1468 }
|
|
|
1469
|
|
|
1470
|
|
|
1471 inline bool includes(void* p, void* from, void* to) {
|
|
|
1472 return from <= p && p < to;
|
|
|
1473 }
|
|
|
1474
|
|
|
1475
|
|
|
1476 void nmethod::copy_scopes_pcs(PcDesc* pcs, int count) {
|
|
|
1477 assert(count >= 2, "must be sentinel values, at least");
|
|
|
1478
|
|
|
1479 #ifdef ASSERT
|
|
|
1480 // must be sorted and unique; we do a binary search in find_pc_desc()
|
|
|
1481 int prev_offset = pcs[0].pc_offset();
|
|
|
1482 assert(prev_offset == PcDesc::lower_offset_limit,
|
|
|
1483 "must start with a sentinel");
|
|
|
1484 for (int i = 1; i < count; i++) {
|
|
|
1485 int this_offset = pcs[i].pc_offset();
|
|
|
1486 assert(this_offset > prev_offset, "offsets must be sorted");
|
|
|
1487 prev_offset = this_offset;
|
|
|
1488 }
|
|
|
1489 assert(prev_offset == PcDesc::upper_offset_limit,
|
|
|
1490 "must end with a sentinel");
|
|
|
1491 #endif //ASSERT
|
|
|
1492
|
|
|
1493 int size = count * sizeof(PcDesc);
|
|
|
1494 assert(scopes_pcs_size() >= size, "oob");
|
|
|
1495 memcpy(scopes_pcs_begin(), pcs, size);
|
|
|
1496
|
|
|
1497 // Adjust the final sentinel downward.
|
|
|
1498 PcDesc* last_pc = &scopes_pcs_begin()[count-1];
|
|
|
1499 assert(last_pc->pc_offset() == PcDesc::upper_offset_limit, "sanity");
|
|
|
1500 last_pc->set_pc_offset(instructions_size() + 1);
|
|
|
1501 for (; last_pc + 1 < scopes_pcs_end(); last_pc += 1) {
|
|
|
1502 // Fill any rounding gaps with copies of the last record.
|
|
|
1503 last_pc[1] = last_pc[0];
|
|
|
1504 }
|
|
|
1505 // The following assert could fail if sizeof(PcDesc) is not
|
|
|
1506 // an integral multiple of oopSize (the rounding term).
|
|
|
1507 // If it fails, change the logic to always allocate a multiple
|
|
|
1508 // of sizeof(PcDesc), and fill unused words with copies of *last_pc.
|
|
|
1509 assert(last_pc + 1 == scopes_pcs_end(), "must match exactly");
|
|
|
1510 }
|
|
|
1511
|
|
|
1512 void nmethod::copy_scopes_data(u_char* buffer, int size) {
|
|
|
1513 assert(scopes_data_size() >= size, "oob");
|
|
|
1514 memcpy(scopes_data_begin(), buffer, size);
|
|
|
1515 }
|
|
|
1516
|
|
|
1517
|
|
|
1518 #ifdef ASSERT
|
|
|
1519 static PcDesc* linear_search(nmethod* nm, int pc_offset, bool approximate) {
|
|
|
1520 PcDesc* lower = nm->scopes_pcs_begin();
|
|
|
1521 PcDesc* upper = nm->scopes_pcs_end();
|
|
|
1522 lower += 1; // exclude initial sentinel
|
|
|
1523 PcDesc* res = NULL;
|
|
|
1524 for (PcDesc* p = lower; p < upper; p++) {
|
|
|
1525 NOT_PRODUCT(--nmethod_stats.pc_desc_tests); // don't count this call to match_desc
|
|
|
1526 if (match_desc(p, pc_offset, approximate)) {
|
|
|
1527 if (res == NULL)
|
|
|
1528 res = p;
|
|
|
1529 else
|
|
|
1530 res = (PcDesc*) badAddress;
|
|
|
1531 }
|
|
|
1532 }
|
|
|
1533 return res;
|
|
|
1534 }
|
|
|
1535 #endif
|
|
|
1536
|
|
|
1537
|
|
|
1538 // Finds a PcDesc with real-pc equal to "pc"
|
|
|
1539 PcDesc* nmethod::find_pc_desc_internal(address pc, bool approximate) {
|
|
|
1540 address base_address = instructions_begin();
|
|
|
1541 if ((pc < base_address) ||
|
|
|
1542 (pc - base_address) >= (ptrdiff_t) PcDesc::upper_offset_limit) {
|
|
|
1543 return NULL; // PC is wildly out of range
|
|
|
1544 }
|
|
|
1545 int pc_offset = (int) (pc - base_address);
|
|
|
1546
|
|
|
1547 // Check the PcDesc cache if it contains the desired PcDesc
|
|
|
1548 // (This as an almost 100% hit rate.)
|
|
|
1549 PcDesc* res = _pc_desc_cache.find_pc_desc(pc_offset, approximate);
|
|
|
1550 if (res != NULL) {
|
|
|
1551 assert(res == linear_search(this, pc_offset, approximate), "cache ok");
|
|
|
1552 return res;
|
|
|
1553 }
|
|
|
1554
|
|
|
1555 // Fallback algorithm: quasi-linear search for the PcDesc
|
|
|
1556 // Find the last pc_offset less than the given offset.
|
|
|
1557 // The successor must be the required match, if there is a match at all.
|
|
|
1558 // (Use a fixed radix to avoid expensive affine pointer arithmetic.)
|
|
|
1559 PcDesc* lower = scopes_pcs_begin();
|
|
|
1560 PcDesc* upper = scopes_pcs_end();
|
|
|
1561 upper -= 1; // exclude final sentinel
|
|
|
1562 if (lower >= upper) return NULL; // native method; no PcDescs at all
|
|
|
1563
|
|
|
1564 #define assert_LU_OK \
|
|
|
1565 /* invariant on lower..upper during the following search: */ \
|
|
|
1566 assert(lower->pc_offset() < pc_offset, "sanity"); \
|
|
|
1567 assert(upper->pc_offset() >= pc_offset, "sanity")
|
|
|
1568 assert_LU_OK;
|
|
|
1569
|
|
|
1570 // Use the last successful return as a split point.
|
|
|
1571 PcDesc* mid = _pc_desc_cache.last_pc_desc();
|
|
|
1572 NOT_PRODUCT(++nmethod_stats.pc_desc_searches);
|
|
|
1573 if (mid->pc_offset() < pc_offset) {
|
|
|
1574 lower = mid;
|
|
|
1575 } else {
|
|
|
1576 upper = mid;
|
|
|
1577 }
|
|
|
1578
|
|
|
1579 // Take giant steps at first (4096, then 256, then 16, then 1)
|
|
|
1580 const int LOG2_RADIX = 4 /*smaller steps in debug mode:*/ debug_only(-1);
|
|
|
1581 const int RADIX = (1 << LOG2_RADIX);
|
|
|
1582 for (int step = (1 << (LOG2_RADIX*3)); step > 1; step >>= LOG2_RADIX) {
|
|
|
1583 while ((mid = lower + step) < upper) {
|
|
|
1584 assert_LU_OK;
|
|
|
1585 NOT_PRODUCT(++nmethod_stats.pc_desc_searches);
|
|
|
1586 if (mid->pc_offset() < pc_offset) {
|
|
|
1587 lower = mid;
|
|
|
1588 } else {
|
|
|
1589 upper = mid;
|
|
|
1590 break;
|
|
|
1591 }
|
|
|
1592 }
|
|
|
1593 assert_LU_OK;
|
|
|
1594 }
|
|
|
1595
|
|
|
1596 // Sneak up on the value with a linear search of length ~16.
|
|
|
1597 while (true) {
|
|
|
1598 assert_LU_OK;
|
|
|
1599 mid = lower + 1;
|
|
|
1600 NOT_PRODUCT(++nmethod_stats.pc_desc_searches);
|
|
|
1601 if (mid->pc_offset() < pc_offset) {
|
|
|
1602 lower = mid;
|
|
|
1603 } else {
|
|
|
1604 upper = mid;
|
|
|
1605 break;
|
|
|
1606 }
|
|
|
1607 }
|
|
|
1608 #undef assert_LU_OK
|
|
|
1609
|
|
|
1610 if (match_desc(upper, pc_offset, approximate)) {
|
|
|
1611 assert(upper == linear_search(this, pc_offset, approximate), "search ok");
|
|
|
1612 _pc_desc_cache.add_pc_desc(upper);
|
|
|
1613 return upper;
|
|
|
1614 } else {
|
|
|
1615 assert(NULL == linear_search(this, pc_offset, approximate), "search ok");
|
|
|
1616 return NULL;
|
|
|
1617 }
|
|
|
1618 }
|
|
|
1619
|
|
|
1620
|
|
|
1621 bool nmethod::check_all_dependencies() {
|
|
|
1622 bool found_check = false;
|
|
|
1623 // wholesale check of all dependencies
|
|
|
1624 for (Dependencies::DepStream deps(this); deps.next(); ) {
|
|
|
1625 if (deps.check_dependency() != NULL) {
|
|
|
1626 found_check = true;
|
|
|
1627 NOT_DEBUG(break);
|
|
|
1628 }
|
|
|
1629 }
|
|
|
1630 return found_check; // tell caller if we found anything
|
|
|
1631 }
|
|
|
1632
|
|
|
1633 bool nmethod::check_dependency_on(DepChange& changes) {
|
|
|
1634 // What has happened:
|
|
|
1635 // 1) a new class dependee has been added
|
|
|
1636 // 2) dependee and all its super classes have been marked
|
|
|
1637 bool found_check = false; // set true if we are upset
|
|
|
1638 for (Dependencies::DepStream deps(this); deps.next(); ) {
|
|
|
1639 // Evaluate only relevant dependencies.
|
|
|
1640 if (deps.spot_check_dependency_at(changes) != NULL) {
|
|
|
1641 found_check = true;
|
|
|
1642 NOT_DEBUG(break);
|
|
|
1643 }
|
|
|
1644 }
|
|
|
1645 return found_check;
|
|
|
1646 }
|
|
|
1647
|
|
|
1648 bool nmethod::is_evol_dependent_on(klassOop dependee) {
|
|
|
1649 instanceKlass *dependee_ik = instanceKlass::cast(dependee);
|
|
|
1650 objArrayOop dependee_methods = dependee_ik->methods();
|
|
|
1651 for (Dependencies::DepStream deps(this); deps.next(); ) {
|
|
|
1652 if (deps.type() == Dependencies::evol_method) {
|
|
|
1653 methodOop method = deps.method_argument(0);
|
|
|
1654 for (int j = 0; j < dependee_methods->length(); j++) {
|
|
|
1655 if ((methodOop) dependee_methods->obj_at(j) == method) {
|
|
|
1656 // RC_TRACE macro has an embedded ResourceMark
|
|
|
1657 RC_TRACE(0x01000000,
|
|
|
1658 ("Found evol dependency of nmethod %s.%s(%s) compile_id=%d on method %s.%s(%s)",
|
|
|
1659 _method->method_holder()->klass_part()->external_name(),
|
|
|
1660 _method->name()->as_C_string(),
|
|
|
1661 _method->signature()->as_C_string(), compile_id(),
|
|
|
1662 method->method_holder()->klass_part()->external_name(),
|
|
|
1663 method->name()->as_C_string(),
|
|
|
1664 method->signature()->as_C_string()));
|
|
|
1665 if (TraceDependencies || LogCompilation)
|
|
|
1666 deps.log_dependency(dependee);
|
|
|
1667 return true;
|
|
|
1668 }
|
|
|
1669 }
|
|
|
1670 }
|
|
|
1671 }
|
|
|
1672 return false;
|
|
|
1673 }
|
|
|
1674
|
|
|
1675 // Called from mark_for_deoptimization, when dependee is invalidated.
|
|
|
1676 bool nmethod::is_dependent_on_method(methodOop dependee) {
|
|
|
1677 for (Dependencies::DepStream deps(this); deps.next(); ) {
|
|
|
1678 if (deps.type() != Dependencies::evol_method)
|
|
|
1679 continue;
|
|
|
1680 methodOop method = deps.method_argument(0);
|
|
|
1681 if (method == dependee) return true;
|
|
|
1682 }
|
|
|
1683 return false;
|
|
|
1684 }
|
|
|
1685
|
|
|
1686
|
|
|
1687 bool nmethod::is_patchable_at(address instr_addr) {
|
|
|
1688 assert (code_contains(instr_addr), "wrong nmethod used");
|
|
|
1689 if (is_zombie()) {
|
|
|
1690 // a zombie may never be patched
|
|
|
1691 return false;
|
|
|
1692 }
|
|
|
1693 return true;
|
|
|
1694 }
|
|
|
1695
|
|
|
1696
|
|
|
1697 address nmethod::continuation_for_implicit_exception(address pc) {
|
|
|
1698 // Exception happened outside inline-cache check code => we are inside
|
|
|
1699 // an active nmethod => use cpc to determine a return address
|
|
|
1700 int exception_offset = pc - instructions_begin();
|
|
|
1701 int cont_offset = ImplicitExceptionTable(this).at( exception_offset );
|
|
|
1702 #ifdef ASSERT
|
|
|
1703 if (cont_offset == 0) {
|
|
|
1704 Thread* thread = ThreadLocalStorage::get_thread_slow();
|
|
|
1705 ResetNoHandleMark rnm; // Might be called from LEAF/QUICK ENTRY
|
|
|
1706 HandleMark hm(thread);
|
|
|
1707 ResourceMark rm(thread);
|
|
|
1708 CodeBlob* cb = CodeCache::find_blob(pc);
|
|
|
1709 assert(cb != NULL && cb == this, "");
|
|
|
1710 tty->print_cr("implicit exception happened at " INTPTR_FORMAT, pc);
|
|
|
1711 print();
|
|
|
1712 method()->print_codes();
|
|
|
1713 print_code();
|
|
|
1714 print_pcs();
|
|
|
1715 }
|
|
|
1716 #endif
|
|
|
1717 guarantee(cont_offset != 0, "unhandled implicit exception in compiled code");
|
|
|
1718 return instructions_begin() + cont_offset;
|
|
|
1719 }
|
|
|
1720
|
|
|
1721
|
|
|
1722
|
|
|
1723 void nmethod_init() {
|
|
|
1724 // make sure you didn't forget to adjust the filler fields
|
|
|
1725 assert(sizeof(nmFlags) <= 4, "nmFlags occupies more than a word");
|
|
|
1726 assert(sizeof(nmethod) % oopSize == 0, "nmethod size must be multiple of a word");
|
|
|
1727 }
|
|
|
1728
|
|
|
1729
|
|
|
1730 //-------------------------------------------------------------------------------------------
|
|
|
1731
|
|
|
1732
|
|
|
1733 // QQQ might we make this work from a frame??
|
|
|
1734 nmethodLocker::nmethodLocker(address pc) {
|
|
|
1735 CodeBlob* cb = CodeCache::find_blob(pc);
|
|
|
1736 guarantee(cb != NULL && cb->is_nmethod(), "bad pc for a nmethod found");
|
|
|
1737 _nm = (nmethod*)cb;
|
|
|
1738 lock_nmethod(_nm);
|
|
|
1739 }
|
|
|
1740
|
|
|
1741 void nmethodLocker::lock_nmethod(nmethod* nm) {
|
|
|
1742 if (nm == NULL) return;
|
|
|
1743 Atomic::inc(&nm->_lock_count);
|
|
|
1744 guarantee(!nm->is_zombie(), "cannot lock a zombie method");
|
|
|
1745 }
|
|
|
1746
|
|
|
1747 void nmethodLocker::unlock_nmethod(nmethod* nm) {
|
|
|
1748 if (nm == NULL) return;
|
|
|
1749 Atomic::dec(&nm->_lock_count);
|
|
|
1750 guarantee(nm->_lock_count >= 0, "unmatched nmethod lock/unlock");
|
|
|
1751 }
|
|
|
1752
|
|
|
1753 bool nmethod::is_deopt_pc(address pc) {
|
|
|
1754 bool ret = pc == deopt_handler_begin();
|
|
|
1755 return ret;
|
|
|
1756 }
|
|
|
1757
|
|
|
1758
|
|
|
1759 // -----------------------------------------------------------------------------
|
|
|
1760 // Verification
|
|
|
1761
|
|
|
1762 void nmethod::verify() {
|
|
|
1763
|
|
|
1764 // Hmm. OSR methods can be deopted but not marked as zombie or not_entrant
|
|
|
1765 // seems odd.
|
|
|
1766
|
|
|
1767 if( is_zombie() || is_not_entrant() )
|
|
|
1768 return;
|
|
|
1769
|
|
|
1770 // Make sure all the entry points are correctly aligned for patching.
|
|
|
1771 NativeJump::check_verified_entry_alignment(entry_point(), verified_entry_point());
|
|
|
1772
|
|
|
1773 assert(method()->is_oop(), "must be valid");
|
|
|
1774
|
|
|
1775 ResourceMark rm;
|
|
|
1776
|
|
|
1777 if (!CodeCache::contains(this)) {
|
|
|
1778 fatal1("nmethod at " INTPTR_FORMAT " not in zone", this);
|
|
|
1779 }
|
|
|
1780
|
|
|
1781 if(is_native_method() )
|
|
|
1782 return;
|
|
|
1783
|
|
|
1784 nmethod* nm = CodeCache::find_nmethod(verified_entry_point());
|
|
|
1785 if (nm != this) {
|
|
|
1786 fatal1("findNMethod did not find this nmethod (" INTPTR_FORMAT ")", this);
|
|
|
1787 }
|
|
|
1788
|
|
|
1789 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) {
|
|
|
1790 if (! p->verify(this)) {
|
|
|
1791 tty->print_cr("\t\tin nmethod at " INTPTR_FORMAT " (pcs)", this);
|
|
|
1792 }
|
|
|
1793 }
|
|
|
1794
|
|
|
1795 verify_scopes();
|
|
|
1796 }
|
|
|
1797
|
|
|
1798
|
|
|
1799 void nmethod::verify_interrupt_point(address call_site) {
|
|
|
1800 // This code does not work in release mode since
|
|
|
1801 // owns_lock only is available in debug mode.
|
|
|
1802 CompiledIC* ic = NULL;
|
|
|
1803 Thread *cur = Thread::current();
|
|
|
1804 if (CompiledIC_lock->owner() == cur ||
|
|
|
1805 ((cur->is_VM_thread() || cur->is_ConcurrentGC_thread()) &&
|
|
|
1806 SafepointSynchronize::is_at_safepoint())) {
|
|
|
1807 ic = CompiledIC_at(call_site);
|
|
|
1808 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops());
|
|
|
1809 } else {
|
|
|
1810 MutexLocker ml_verify (CompiledIC_lock);
|
|
|
1811 ic = CompiledIC_at(call_site);
|
|
|
1812 }
|
|
|
1813 PcDesc* pd = pc_desc_at(ic->end_of_call());
|
|
|
1814 assert(pd != NULL, "PcDesc must exist");
|
|
|
1815 for (ScopeDesc* sd = new ScopeDesc(this, pd->scope_decode_offset(),
|
|
|
1816 pd->obj_decode_offset());
|
|
|
1817 !sd->is_top(); sd = sd->sender()) {
|
|
|
1818 sd->verify();
|
|
|
1819 }
|
|
|
1820 }
|
|
|
1821
|
|
|
1822 void nmethod::verify_scopes() {
|
|
|
1823 if( !method() ) return; // Runtime stubs have no scope
|
|
|
1824 if (method()->is_native()) return; // Ignore stub methods.
|
|
|
1825 // iterate through all interrupt point
|
|
|
1826 // and verify the debug information is valid.
|
|
|
1827 RelocIterator iter((nmethod*)this);
|
|
|
1828 while (iter.next()) {
|
|
|
1829 address stub = NULL;
|
|
|
1830 switch (iter.type()) {
|
|
|
1831 case relocInfo::virtual_call_type:
|
|
|
1832 verify_interrupt_point(iter.addr());
|
|
|
1833 break;
|
|
|
1834 case relocInfo::opt_virtual_call_type:
|
|
|
1835 stub = iter.opt_virtual_call_reloc()->static_stub();
|
|
|
1836 verify_interrupt_point(iter.addr());
|
|
|
1837 break;
|
|
|
1838 case relocInfo::static_call_type:
|
|
|
1839 stub = iter.static_call_reloc()->static_stub();
|
|
|
1840 //verify_interrupt_point(iter.addr());
|
|
|
1841 break;
|
|
|
1842 case relocInfo::runtime_call_type:
|
|
|
1843 address destination = iter.reloc()->value();
|
|
|
1844 // Right now there is no way to find out which entries support
|
|
|
1845 // an interrupt point. It would be nice if we had this
|
|
|
1846 // information in a table.
|
|
|
1847 break;
|
|
|
1848 }
|
|
|
1849 assert(stub == NULL || stub_contains(stub), "static call stub outside stub section");
|
|
|
1850 }
|
|
|
1851 }
|
|
|
1852
|
|
|
1853
|
|
|
1854 // -----------------------------------------------------------------------------
|
|
|
1855 // Non-product code
|
|
|
1856 #ifndef PRODUCT
|
|
|
1857
|
|
|
1858 void nmethod::check_store() {
|
|
|
1859 // Make sure all oops in the compiled code are tenured
|
|
|
1860
|
|
|
1861 RelocIterator iter(this);
|
|
|
1862 while (iter.next()) {
|
|
|
1863 if (iter.type() == relocInfo::oop_type) {
|
|
|
1864 oop_Relocation* reloc = iter.oop_reloc();
|
|
|
1865 oop obj = reloc->oop_value();
|
|
|
1866 if (obj != NULL && !obj->is_perm()) {
|
|
|
1867 fatal("must be permanent oop in compiled code");
|
|
|
1868 }
|
|
|
1869 }
|
|
|
1870 }
|
|
|
1871 }
|
|
|
1872
|
|
|
1873
|
|
|
1874 // Printing operations
|
|
|
1875
|
|
|
1876 void nmethod::print() const {
|
|
|
1877 ResourceMark rm;
|
|
|
1878 ttyLocker ttyl; // keep the following output all in one block
|
|
|
1879
|
|
|
1880 tty->print("Compiled ");
|
|
|
1881
|
|
|
1882 if (is_compiled_by_c1()) {
|
|
|
1883 tty->print("(c1) ");
|
|
|
1884 } else if (is_compiled_by_c2()) {
|
|
|
1885 tty->print("(c2) ");
|
|
|
1886 } else {
|
|
|
1887 assert(is_native_method(), "Who else?");
|
|
|
1888 tty->print("(nm) ");
|
|
|
1889 }
|
|
|
1890
|
|
|
1891 print_on(tty, "nmethod");
|
|
|
1892 tty->cr();
|
|
|
1893 if (WizardMode) {
|
|
|
1894 tty->print("((nmethod*) "INTPTR_FORMAT ") ", this);
|
|
|
1895 tty->print(" for method " INTPTR_FORMAT , (address)method());
|
|
|
1896 tty->print(" { ");
|
|
|
1897 if (version()) tty->print("v%d ", version());
|
|
|
1898 if (level()) tty->print("l%d ", level());
|
|
|
1899 if (is_in_use()) tty->print("in_use ");
|
|
|
1900 if (is_not_entrant()) tty->print("not_entrant ");
|
|
|
1901 if (is_zombie()) tty->print("zombie ");
|
|
|
1902 if (is_unloaded()) tty->print("unloaded ");
|
|
|
1903 tty->print_cr("}:");
|
|
|
1904 }
|
|
|
1905 if (size () > 0) tty->print_cr(" total in heap [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d",
|
|
|
1906 (address)this,
|
|
|
1907 (address)this + size(),
|
|
|
1908 size());
|
|
|
1909 if (relocation_size () > 0) tty->print_cr(" relocation [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d",
|
|
|
1910 relocation_begin(),
|
|
|
1911 relocation_end(),
|
|
|
1912 relocation_size());
|
|
|
1913 if (code_size () > 0) tty->print_cr(" main code [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d",
|
|
|
1914 code_begin(),
|
|
|
1915 code_end(),
|
|
|
1916 code_size());
|
|
|
1917 if (stub_size () > 0) tty->print_cr(" stub code [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d",
|
|
|
1918 stub_begin(),
|
|
|
1919 stub_end(),
|
|
|
1920 stub_size());
|
|
|
1921 if (consts_size () > 0) tty->print_cr(" constants [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d",
|
|
|
1922 consts_begin(),
|
|
|
1923 consts_end(),
|
|
|
1924 consts_size());
|
|
|
1925 if (scopes_data_size () > 0) tty->print_cr(" scopes data [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d",
|
|
|
1926 scopes_data_begin(),
|
|
|
1927 scopes_data_end(),
|
|
|
1928 scopes_data_size());
|
|
|
1929 if (scopes_pcs_size () > 0) tty->print_cr(" scopes pcs [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d",
|
|
|
1930 scopes_pcs_begin(),
|
|
|
1931 scopes_pcs_end(),
|
|
|
1932 scopes_pcs_size());
|
|
|
1933 if (dependencies_size () > 0) tty->print_cr(" dependencies [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d",
|
|
|
1934 dependencies_begin(),
|
|
|
1935 dependencies_end(),
|
|
|
1936 dependencies_size());
|
|
|
1937 if (handler_table_size() > 0) tty->print_cr(" handler table [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d",
|
|
|
1938 handler_table_begin(),
|
|
|
1939 handler_table_end(),
|
|
|
1940 handler_table_size());
|
|
|
1941 if (nul_chk_table_size() > 0) tty->print_cr(" nul chk table [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d",
|
|
|
1942 nul_chk_table_begin(),
|
|
|
1943 nul_chk_table_end(),
|
|
|
1944 nul_chk_table_size());
|
|
|
1945 if (oops_size () > 0) tty->print_cr(" oops [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d",
|
|
|
1946 oops_begin(),
|
|
|
1947 oops_end(),
|
|
|
1948 oops_size());
|
|
|
1949 }
|
|
|
1950
|
|
|
1951
|
|
|
1952 void nmethod::print_scopes() {
|
|
|
1953 // Find the first pc desc for all scopes in the code and print it.
|
|
|
1954 ResourceMark rm;
|
|
|
1955 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) {
|
|
|
1956 if (p->scope_decode_offset() == DebugInformationRecorder::serialized_null)
|
|
|
1957 continue;
|
|
|
1958
|
|
|
1959 ScopeDesc* sd = scope_desc_at(p->real_pc(this));
|
|
|
1960 sd->print_on(tty, p);
|
|
|
1961 }
|
|
|
1962 }
|
|
|
1963
|
|
|
1964 void nmethod::print_dependencies() {
|
|
|
1965 ResourceMark rm;
|
|
|
1966 ttyLocker ttyl; // keep the following output all in one block
|
|
|
1967 tty->print_cr("Dependencies:");
|
|
|
1968 for (Dependencies::DepStream deps(this); deps.next(); ) {
|
|
|
1969 deps.print_dependency();
|
|
|
1970 klassOop ctxk = deps.context_type();
|
|
|
1971 if (ctxk != NULL) {
|
|
|
1972 Klass* k = Klass::cast(ctxk);
|
|
|
1973 if (k->oop_is_instance() && ((instanceKlass*)k)->is_dependent_nmethod(this)) {
|
|
30
|
1974 tty->print_cr(" [nmethod<=klass]%s", k->external_name());
|
|
0
|
1975 }
|
|
|
1976 }
|
|
|
1977 deps.log_dependency(); // put it into the xml log also
|
|
|
1978 }
|
|
|
1979 }
|
|
|
1980
|
|
|
1981
|
|
|
1982 void nmethod::print_code() {
|
|
|
1983 HandleMark hm;
|
|
|
1984 ResourceMark m;
|
|
|
1985 Disassembler().decode(this);
|
|
|
1986 }
|
|
|
1987
|
|
|
1988
|
|
|
1989 void nmethod::print_relocations() {
|
|
|
1990 ResourceMark m; // in case methods get printed via the debugger
|
|
|
1991 tty->print_cr("relocations:");
|
|
|
1992 RelocIterator iter(this);
|
|
|
1993 iter.print();
|
|
|
1994 if (UseRelocIndex) {
|
|
|
1995 jint* index_end = (jint*)relocation_end() - 1;
|
|
|
1996 jint index_size = *index_end;
|
|
|
1997 jint* index_start = (jint*)( (address)index_end - index_size );
|
|
|
1998 tty->print_cr(" index @" INTPTR_FORMAT ": index_size=%d", index_start, index_size);
|
|
|
1999 if (index_size > 0) {
|
|
|
2000 jint* ip;
|
|
|
2001 for (ip = index_start; ip+2 <= index_end; ip += 2)
|
|
|
2002 tty->print_cr(" (%d %d) addr=" INTPTR_FORMAT " @" INTPTR_FORMAT,
|
|
|
2003 ip[0],
|
|
|
2004 ip[1],
|
|
|
2005 header_end()+ip[0],
|
|
|
2006 relocation_begin()-1+ip[1]);
|
|
|
2007 for (; ip < index_end; ip++)
|
|
|
2008 tty->print_cr(" (%d ?)", ip[0]);
|
|
|
2009 tty->print_cr(" @" INTPTR_FORMAT ": index_size=%d", ip, *ip++);
|
|
|
2010 tty->print_cr("reloc_end @" INTPTR_FORMAT ":", ip);
|
|
|
2011 }
|
|
|
2012 }
|
|
|
2013 }
|
|
|
2014
|
|
|
2015
|
|
|
2016 void nmethod::print_pcs() {
|
|
|
2017 ResourceMark m; // in case methods get printed via debugger
|
|
|
2018 tty->print_cr("pc-bytecode offsets:");
|
|
|
2019 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) {
|
|
|
2020 p->print(this);
|
|
|
2021 }
|
|
|
2022 }
|
|
|
2023
|
|
|
2024
|
|
|
2025 const char* nmethod::reloc_string_for(u_char* begin, u_char* end) {
|
|
|
2026 RelocIterator iter(this, begin, end);
|
|
|
2027 bool have_one = false;
|
|
|
2028 while (iter.next()) {
|
|
|
2029 have_one = true;
|
|
|
2030 switch (iter.type()) {
|
|
|
2031 case relocInfo::none: return "no_reloc";
|
|
|
2032 case relocInfo::oop_type: {
|
|
|
2033 stringStream st;
|
|
|
2034 oop_Relocation* r = iter.oop_reloc();
|
|
|
2035 oop obj = r->oop_value();
|
|
|
2036 st.print("oop(");
|
|
|
2037 if (obj == NULL) st.print("NULL");
|
|
|
2038 else obj->print_value_on(&st);
|
|
|
2039 st.print(")");
|
|
|
2040 return st.as_string();
|
|
|
2041 }
|
|
|
2042 case relocInfo::virtual_call_type: return "virtual_call";
|
|
|
2043 case relocInfo::opt_virtual_call_type: return "optimized virtual_call";
|
|
|
2044 case relocInfo::static_call_type: return "static_call";
|
|
|
2045 case relocInfo::static_stub_type: return "static_stub";
|
|
|
2046 case relocInfo::runtime_call_type: return "runtime_call";
|
|
|
2047 case relocInfo::external_word_type: return "external_word";
|
|
|
2048 case relocInfo::internal_word_type: return "internal_word";
|
|
|
2049 case relocInfo::section_word_type: return "section_word";
|
|
|
2050 case relocInfo::poll_type: return "poll";
|
|
|
2051 case relocInfo::poll_return_type: return "poll_return";
|
|
|
2052 case relocInfo::type_mask: return "type_bit_mask";
|
|
|
2053 }
|
|
|
2054 }
|
|
|
2055 return have_one ? "other" : NULL;
|
|
|
2056 }
|
|
|
2057
|
|
|
2058
|
|
|
2059 // Return a the last scope in (begin..end]
|
|
|
2060 ScopeDesc* nmethod::scope_desc_in(address begin, address end) {
|
|
|
2061 PcDesc* p = pc_desc_near(begin+1);
|
|
|
2062 if (p != NULL && p->real_pc(this) <= end) {
|
|
|
2063 return new ScopeDesc(this, p->scope_decode_offset(),
|
|
|
2064 p->obj_decode_offset());
|
|
|
2065 }
|
|
|
2066 return NULL;
|
|
|
2067 }
|
|
|
2068
|
|
|
2069 void nmethod::print_code_comment_on(outputStream* st, int column, u_char* begin, u_char* end) {
|
|
|
2070 // First, find an oopmap in (begin, end].
|
|
|
2071 // We use the odd half-closed interval so that oop maps and scope descs
|
|
|
2072 // which are tied to the byte after a call are printed with the call itself.
|
|
|
2073 address base = instructions_begin();
|
|
|
2074 OopMapSet* oms = oop_maps();
|
|
|
2075 if (oms != NULL) {
|
|
|
2076 for (int i = 0, imax = oms->size(); i < imax; i++) {
|
|
|
2077 OopMap* om = oms->at(i);
|
|
|
2078 address pc = base + om->offset();
|
|
|
2079 if (pc > begin) {
|
|
|
2080 if (pc <= end) {
|
|
|
2081 st->fill_to(column);
|
|
|
2082 if (st == tty) {
|
|
|
2083 st->print("; OopMap ");
|
|
|
2084 om->print();
|
|
|
2085 tty->cr();
|
|
|
2086 } else {
|
|
|
2087 st->print_cr("; OopMap #%d offset:%d", i, om->offset());
|
|
|
2088 }
|
|
|
2089 }
|
|
|
2090 break;
|
|
|
2091 }
|
|
|
2092 }
|
|
|
2093 }
|
|
|
2094 ScopeDesc* sd = scope_desc_in(begin, end);
|
|
|
2095 if (sd != NULL) {
|
|
|
2096 st->fill_to(column);
|
|
|
2097 if (sd->bci() == SynchronizationEntryBCI) {
|
|
|
2098 st->print(";*synchronization entry");
|
|
|
2099 } else {
|
|
|
2100 if (sd->method().is_null()) {
|
|
|
2101 tty->print("method is NULL");
|
|
|
2102 } else if (sd->method()->is_native()) {
|
|
|
2103 tty->print("method is native");
|
|
|
2104 } else {
|
|
|
2105 address bcp = sd->method()->bcp_from(sd->bci());
|
|
|
2106 Bytecodes::Code bc = Bytecodes::java_code_at(bcp);
|
|
|
2107 st->print(";*%s", Bytecodes::name(bc));
|
|
|
2108 switch (bc) {
|
|
|
2109 case Bytecodes::_invokevirtual:
|
|
|
2110 case Bytecodes::_invokespecial:
|
|
|
2111 case Bytecodes::_invokestatic:
|
|
|
2112 case Bytecodes::_invokeinterface:
|
|
|
2113 {
|
|
|
2114 Bytecode_invoke* invoke = Bytecode_invoke_at(sd->method(), sd->bci());
|
|
|
2115 st->print(" ");
|
|
|
2116 if (invoke->name() != NULL)
|
|
|
2117 invoke->name()->print_symbol_on(st);
|
|
|
2118 else
|
|
|
2119 st->print("<UNKNOWN>");
|
|
|
2120 break;
|
|
|
2121 }
|
|
|
2122 case Bytecodes::_getfield:
|
|
|
2123 case Bytecodes::_putfield:
|
|
|
2124 case Bytecodes::_getstatic:
|
|
|
2125 case Bytecodes::_putstatic:
|
|
|
2126 {
|
|
|
2127 methodHandle sdm = sd->method();
|
|
|
2128 Bytecode_field* field = Bytecode_field_at(sdm(), sdm->bcp_from(sd->bci()));
|
|
|
2129 constantPoolOop sdmc = sdm->constants();
|
|
|
2130 symbolOop name = sdmc->name_ref_at(field->index());
|
|
|
2131 st->print(" ");
|
|
|
2132 if (name != NULL)
|
|
|
2133 name->print_symbol_on(st);
|
|
|
2134 else
|
|
|
2135 st->print("<UNKNOWN>");
|
|
|
2136 }
|
|
|
2137 }
|
|
|
2138 }
|
|
|
2139 }
|
|
|
2140 st->cr();
|
|
|
2141 // Print all scopes
|
|
|
2142 for (;sd != NULL; sd = sd->sender()) {
|
|
|
2143 st->fill_to(column);
|
|
|
2144 st->print("; -");
|
|
|
2145 if (sd->method().is_null()) {
|
|
|
2146 tty->print("method is NULL");
|
|
|
2147 } else {
|
|
|
2148 sd->method()->print_short_name(st);
|
|
|
2149 }
|
|
|
2150 int lineno = sd->method()->line_number_from_bci(sd->bci());
|
|
|
2151 if (lineno != -1) {
|
|
|
2152 st->print("@%d (line %d)", sd->bci(), lineno);
|
|
|
2153 } else {
|
|
|
2154 st->print("@%d", sd->bci());
|
|
|
2155 }
|
|
|
2156 st->cr();
|
|
|
2157 }
|
|
|
2158 }
|
|
|
2159
|
|
|
2160 // Print relocation information
|
|
|
2161 const char* str = reloc_string_for(begin, end);
|
|
|
2162 if (str != NULL) {
|
|
|
2163 if (sd != NULL) st->cr();
|
|
|
2164 st->fill_to(column);
|
|
|
2165 st->print("; {%s}", str);
|
|
|
2166 }
|
|
|
2167 int cont_offset = ImplicitExceptionTable(this).at(begin - instructions_begin());
|
|
|
2168 if (cont_offset != 0) {
|
|
|
2169 st->fill_to(column);
|
|
|
2170 st->print("; implicit exception: dispatches to " INTPTR_FORMAT, instructions_begin() + cont_offset);
|
|
|
2171 }
|
|
|
2172
|
|
|
2173 }
|
|
|
2174
|
|
|
2175 void nmethod::print_value_on(outputStream* st) const {
|
|
|
2176 print_on(st, "nmethod");
|
|
|
2177 }
|
|
|
2178
|
|
|
2179 void nmethod::print_calls(outputStream* st) {
|
|
|
2180 RelocIterator iter(this);
|
|
|
2181 while (iter.next()) {
|
|
|
2182 switch (iter.type()) {
|
|
|
2183 case relocInfo::virtual_call_type:
|
|
|
2184 case relocInfo::opt_virtual_call_type: {
|
|
|
2185 VerifyMutexLocker mc(CompiledIC_lock);
|
|
|
2186 CompiledIC_at(iter.reloc())->print();
|
|
|
2187 break;
|
|
|
2188 }
|
|
|
2189 case relocInfo::static_call_type:
|
|
|
2190 st->print_cr("Static call at " INTPTR_FORMAT, iter.reloc()->addr());
|
|
|
2191 compiledStaticCall_at(iter.reloc())->print();
|
|
|
2192 break;
|
|
|
2193 }
|
|
|
2194 }
|
|
|
2195 }
|
|
|
2196
|
|
|
2197 void nmethod::print_handler_table() {
|
|
|
2198 ExceptionHandlerTable(this).print();
|
|
|
2199 }
|
|
|
2200
|
|
|
2201 void nmethod::print_nul_chk_table() {
|
|
|
2202 ImplicitExceptionTable(this).print(instructions_begin());
|
|
|
2203 }
|
|
|
2204
|
|
|
2205 void nmethod::print_statistics() {
|
|
|
2206 ttyLocker ttyl;
|
|
|
2207 if (xtty != NULL) xtty->head("statistics type='nmethod'");
|
|
|
2208 nmethod_stats.print_native_nmethod_stats();
|
|
|
2209 nmethod_stats.print_nmethod_stats();
|
|
|
2210 DebugInformationRecorder::print_statistics();
|
|
|
2211 nmethod_stats.print_pc_stats();
|
|
|
2212 Dependencies::print_statistics();
|
|
|
2213 if (xtty != NULL) xtty->tail("statistics");
|
|
|
2214 }
|
|
|
2215
|
|
|
2216 #endif // PRODUCT
|
