0
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1 /*
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2 * Copyright 1999-2007 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/_ciMethod.cpp.incl"
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27
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28 // ciMethod
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29 //
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30 // This class represents a methodOop in the HotSpot virtual
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31 // machine.
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32
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33
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34 // ------------------------------------------------------------------
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35 // ciMethod::ciMethod
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36 //
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37 // Loaded method.
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38 ciMethod::ciMethod(methodHandle h_m) : ciObject(h_m) {
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39 assert(h_m() != NULL, "no null method");
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40
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41 // These fields are always filled in in loaded methods.
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42 _flags = ciFlags(h_m()->access_flags());
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43
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44 // Easy to compute, so fill them in now.
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45 _max_stack = h_m()->max_stack();
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46 _max_locals = h_m()->max_locals();
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47 _code_size = h_m()->code_size();
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48 _intrinsic_id = h_m()->intrinsic_id();
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49 _handler_count = h_m()->exception_table()->length() / 4;
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50 _uses_monitors = h_m()->access_flags().has_monitor_bytecodes();
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51 _balanced_monitors = !_uses_monitors || h_m()->access_flags().is_monitor_matching();
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52 _is_compilable = !h_m()->is_not_compilable();
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53 // Lazy fields, filled in on demand. Require allocation.
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54 _code = NULL;
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55 _exception_handlers = NULL;
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56 _liveness = NULL;
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57 _bcea = NULL;
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58 _method_blocks = NULL;
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59 #ifdef COMPILER2
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60 _flow = NULL;
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61 #endif // COMPILER2
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62
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63 if (JvmtiExport::can_hotswap_or_post_breakpoint() && _is_compilable) {
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64 // 6328518 check hotswap conditions under the right lock.
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65 MutexLocker locker(Compile_lock);
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66 if (Dependencies::check_evol_method(h_m()) != NULL) {
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67 _is_compilable = false;
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68 }
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69 } else {
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70 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops());
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71 }
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72
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73 if (instanceKlass::cast(h_m()->method_holder())->is_linked()) {
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74 _can_be_statically_bound = h_m()->can_be_statically_bound();
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75 } else {
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76 // Have to use a conservative value in this case.
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77 _can_be_statically_bound = false;
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78 }
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79
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80 // Adjust the definition of this condition to be more useful:
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81 // %%% take these conditions into account in vtable generation
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82 if (!_can_be_statically_bound && h_m()->is_private())
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83 _can_be_statically_bound = true;
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84 if (_can_be_statically_bound && h_m()->is_abstract())
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85 _can_be_statically_bound = false;
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86
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87 ciEnv *env = CURRENT_ENV;
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88 // generating _signature may allow GC and therefore move m.
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89 // These fields are always filled in.
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90 _name = env->get_object(h_m()->name())->as_symbol();
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91 _holder = env->get_object(h_m()->method_holder())->as_instance_klass();
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92 ciSymbol* sig_symbol = env->get_object(h_m()->signature())->as_symbol();
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93 _signature = new (env->arena()) ciSignature(_holder, sig_symbol);
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94 _method_data = NULL;
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95 // Take a snapshot of these values, so they will be commensurate with the MDO.
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96 if (ProfileInterpreter) {
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97 int invcnt = h_m()->interpreter_invocation_count();
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98 // if the value overflowed report it as max int
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99 _interpreter_invocation_count = invcnt < 0 ? max_jint : invcnt ;
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100 _interpreter_throwout_count = h_m()->interpreter_throwout_count();
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101 } else {
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102 _interpreter_invocation_count = 0;
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103 _interpreter_throwout_count = 0;
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104 }
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105 if (_interpreter_invocation_count == 0)
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106 _interpreter_invocation_count = 1;
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107 }
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108
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109
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110 // ------------------------------------------------------------------
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111 // ciMethod::ciMethod
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112 //
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113 // Unloaded method.
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114 ciMethod::ciMethod(ciInstanceKlass* holder,
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115 ciSymbol* name,
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116 ciSymbol* signature) : ciObject(ciMethodKlass::make()) {
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117 // These fields are always filled in.
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118 _name = name;
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119 _holder = holder;
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120 _signature = new (CURRENT_ENV->arena()) ciSignature(_holder, signature);
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121 _intrinsic_id = vmIntrinsics::_none;
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122 _liveness = NULL;
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123 _can_be_statically_bound = false;
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124 _bcea = NULL;
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125 _method_blocks = NULL;
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126 _method_data = NULL;
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127 #ifdef COMPILER2
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128 _flow = NULL;
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129 #endif // COMPILER2
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130 }
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131
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132
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133 // ------------------------------------------------------------------
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134 // ciMethod::load_code
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135 //
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136 // Load the bytecodes and exception handler table for this method.
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137 void ciMethod::load_code() {
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138 VM_ENTRY_MARK;
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139 assert(is_loaded(), "only loaded methods have code");
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140
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141 methodOop me = get_methodOop();
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142 Arena* arena = CURRENT_THREAD_ENV->arena();
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143
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144 // Load the bytecodes.
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145 _code = (address)arena->Amalloc(code_size());
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146 memcpy(_code, me->code_base(), code_size());
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147
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148 // Revert any breakpoint bytecodes in ci's copy
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149 if (_is_compilable && me->number_of_breakpoints() > 0) {
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150 BreakpointInfo* bp = instanceKlass::cast(me->method_holder())->breakpoints();
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151 for (; bp != NULL; bp = bp->next()) {
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152 if (bp->match(me)) {
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153 code_at_put(bp->bci(), bp->orig_bytecode());
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154 }
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155 }
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156 }
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157
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158 // And load the exception table.
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159 typeArrayOop exc_table = me->exception_table();
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160
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161 // Allocate one extra spot in our list of exceptions. This
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162 // last entry will be used to represent the possibility that
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163 // an exception escapes the method. See ciExceptionHandlerStream
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164 // for details.
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165 _exception_handlers =
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166 (ciExceptionHandler**)arena->Amalloc(sizeof(ciExceptionHandler*)
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167 * (_handler_count + 1));
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168 if (_handler_count > 0) {
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169 for (int i=0; i<_handler_count; i++) {
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170 int base = i*4;
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171 _exception_handlers[i] = new (arena) ciExceptionHandler(
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172 holder(),
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173 /* start */ exc_table->int_at(base),
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174 /* limit */ exc_table->int_at(base+1),
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175 /* goto pc */ exc_table->int_at(base+2),
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176 /* cp index */ exc_table->int_at(base+3));
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177 }
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178 }
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179
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180 // Put an entry at the end of our list to represent the possibility
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181 // of exceptional exit.
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182 _exception_handlers[_handler_count] =
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183 new (arena) ciExceptionHandler(holder(), 0, code_size(), -1, 0);
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184
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185 if (CIPrintMethodCodes) {
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186 print_codes();
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187 }
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188 }
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189
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190
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191 // ------------------------------------------------------------------
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192 // ciMethod::has_linenumber_table
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193 //
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194 // length unknown until decompression
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195 bool ciMethod::has_linenumber_table() const {
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196 check_is_loaded();
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197 VM_ENTRY_MARK;
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198 return get_methodOop()->has_linenumber_table();
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199 }
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200
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201
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202 // ------------------------------------------------------------------
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203 // ciMethod::compressed_linenumber_table
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204 u_char* ciMethod::compressed_linenumber_table() const {
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205 check_is_loaded();
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206 VM_ENTRY_MARK;
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207 return get_methodOop()->compressed_linenumber_table();
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208 }
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209
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210
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211 // ------------------------------------------------------------------
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212 // ciMethod::line_number_from_bci
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213 int ciMethod::line_number_from_bci(int bci) const {
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214 check_is_loaded();
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215 VM_ENTRY_MARK;
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216 return get_methodOop()->line_number_from_bci(bci);
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217 }
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218
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219
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220 // ------------------------------------------------------------------
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221 // ciMethod::vtable_index
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222 //
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223 // Get the position of this method's entry in the vtable, if any.
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224 int ciMethod::vtable_index() {
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225 check_is_loaded();
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226 assert(holder()->is_linked(), "must be linked");
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227 VM_ENTRY_MARK;
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228 return get_methodOop()->vtable_index();
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229 }
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230
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231
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232 // ------------------------------------------------------------------
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233 // ciMethod::native_entry
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234 //
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235 // Get the address of this method's native code, if any.
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236 address ciMethod::native_entry() {
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237 check_is_loaded();
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238 assert(flags().is_native(), "must be native method");
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239 VM_ENTRY_MARK;
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240 methodOop method = get_methodOop();
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241 address entry = method->native_function();
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242 assert(entry != NULL, "must be valid entry point");
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243 return entry;
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244 }
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245
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246
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247 // ------------------------------------------------------------------
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248 // ciMethod::interpreter_entry
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249 //
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250 // Get the entry point for running this method in the interpreter.
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251 address ciMethod::interpreter_entry() {
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252 check_is_loaded();
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253 VM_ENTRY_MARK;
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254 methodHandle mh(THREAD, get_methodOop());
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255 return Interpreter::entry_for_method(mh);
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256 }
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257
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258
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259 // ------------------------------------------------------------------
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260 // ciMethod::uses_balanced_monitors
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261 //
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262 // Does this method use monitors in a strict stack-disciplined manner?
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263 bool ciMethod::has_balanced_monitors() {
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264 check_is_loaded();
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265 if (_balanced_monitors) return true;
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266
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267 // Analyze the method to see if monitors are used properly.
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268 VM_ENTRY_MARK;
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269 methodHandle method(THREAD, get_methodOop());
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270 assert(method->has_monitor_bytecodes(), "should have checked this");
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271
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272 // Check to see if a previous compilation computed the
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273 // monitor-matching analysis.
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274 if (method->guaranteed_monitor_matching()) {
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275 _balanced_monitors = true;
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276 return true;
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277 }
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278
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279 {
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280 EXCEPTION_MARK;
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281 ResourceMark rm(THREAD);
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282 GeneratePairingInfo gpi(method);
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283 gpi.compute_map(CATCH);
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284 if (!gpi.monitor_safe()) {
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285 return false;
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286 }
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287 method->set_guaranteed_monitor_matching();
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288 _balanced_monitors = true;
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289 }
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290 return true;
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291 }
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292
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293
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294 // ------------------------------------------------------------------
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295 // ciMethod::get_flow_analysis
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296 ciTypeFlow* ciMethod::get_flow_analysis() {
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297 #ifdef COMPILER2
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298 if (_flow == NULL) {
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299 ciEnv* env = CURRENT_ENV;
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300 _flow = new (env->arena()) ciTypeFlow(env, this);
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301 _flow->do_flow();
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302 }
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303 return _flow;
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304 #else // COMPILER2
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305 ShouldNotReachHere();
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306 return NULL;
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307 #endif // COMPILER2
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308 }
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309
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310
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311 // ------------------------------------------------------------------
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312 // ciMethod::get_osr_flow_analysis
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313 ciTypeFlow* ciMethod::get_osr_flow_analysis(int osr_bci) {
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314 #ifdef COMPILER2
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315 // OSR entry points are always place after a call bytecode of some sort
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316 assert(osr_bci >= 0, "must supply valid OSR entry point");
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317 ciEnv* env = CURRENT_ENV;
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318 ciTypeFlow* flow = new (env->arena()) ciTypeFlow(env, this, osr_bci);
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319 flow->do_flow();
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320 return flow;
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321 #else // COMPILER2
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322 ShouldNotReachHere();
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323 return NULL;
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324 #endif // COMPILER2
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325 }
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326
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327 // ------------------------------------------------------------------
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328 // ciMethod::liveness_at_bci
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329 //
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330 // Which local variables are live at a specific bci?
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331 MethodLivenessResult ciMethod::liveness_at_bci(int bci) {
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332 check_is_loaded();
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333 if (_liveness == NULL) {
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334 // Create the liveness analyzer.
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335 Arena* arena = CURRENT_ENV->arena();
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336 _liveness = new (arena) MethodLiveness(arena, this);
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337 _liveness->compute_liveness();
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338 }
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339 MethodLivenessResult result = _liveness->get_liveness_at(bci);
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340 if (JvmtiExport::can_access_local_variables() || DeoptimizeALot || CompileTheWorld) {
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341 // Keep all locals live for the user's edification and amusement.
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342 result.at_put_range(0, result.size(), true);
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343 }
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344 return result;
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345 }
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346
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347 // ciMethod::live_local_oops_at_bci
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348 //
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349 // find all the live oops in the locals array for a particular bci
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350 // Compute what the interpreter believes by using the interpreter
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351 // oopmap generator. This is used as a double check during osr to
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352 // guard against conservative result from MethodLiveness making us
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353 // think a dead oop is live. MethodLiveness is conservative in the
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354 // sense that it may consider locals to be live which cannot be live,
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355 // like in the case where a local could contain an oop or a primitive
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356 // along different paths. In that case the local must be dead when
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357 // those paths merge. Since the interpreter's viewpoint is used when
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358 // gc'ing an interpreter frame we need to use its viewpoint during
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359 // OSR when loading the locals.
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360
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361 BitMap ciMethod::live_local_oops_at_bci(int bci) {
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362 VM_ENTRY_MARK;
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363 InterpreterOopMap mask;
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364 OopMapCache::compute_one_oop_map(get_methodOop(), bci, &mask);
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365 int mask_size = max_locals();
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366 BitMap result(mask_size);
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367 result.clear();
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368 int i;
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369 for (i = 0; i < mask_size ; i++ ) {
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370 if (mask.is_oop(i)) result.set_bit(i);
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371 }
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372 return result;
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373 }
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374
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375
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376 #ifdef COMPILER1
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377 // ------------------------------------------------------------------
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378 // ciMethod::bci_block_start
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379 //
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380 // Marks all bcis where a new basic block starts
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381 const BitMap ciMethod::bci_block_start() {
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382 check_is_loaded();
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383 if (_liveness == NULL) {
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384 // Create the liveness analyzer.
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385 Arena* arena = CURRENT_ENV->arena();
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386 _liveness = new (arena) MethodLiveness(arena, this);
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387 _liveness->compute_liveness();
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388 }
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389
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390 return _liveness->get_bci_block_start();
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391 }
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392 #endif // COMPILER1
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393
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394
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395 // ------------------------------------------------------------------
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396 // ciMethod::call_profile_at_bci
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397 //
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398 // Get the ciCallProfile for the invocation of this method.
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399 // Also reports receiver types for non-call type checks (if TypeProfileCasts).
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400 ciCallProfile ciMethod::call_profile_at_bci(int bci) {
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401 ResourceMark rm;
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402 ciCallProfile result;
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403 if (method_data() != NULL && method_data()->is_mature()) {
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404 ciProfileData* data = method_data()->bci_to_data(bci);
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405 if (data != NULL && data->is_CounterData()) {
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406 // Every profiled call site has a counter.
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407 int count = data->as_CounterData()->count();
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408
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409 if (!data->is_ReceiverTypeData()) {
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410 result._receiver_count[0] = 0; // that's a definite zero
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411 } else { // ReceiverTypeData is a subclass of CounterData
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412 ciReceiverTypeData* call = (ciReceiverTypeData*)data->as_ReceiverTypeData();
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413 // In addition, virtual call sites have receiver type information
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414 int receivers_count_total = 0;
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415 int morphism = 0;
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416 for (uint i = 0; i < call->row_limit(); i++) {
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417 ciKlass* receiver = call->receiver(i);
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418 if (receiver == NULL) continue;
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419 morphism += 1;
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420 int rcount = call->receiver_count(i);
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421 if (rcount == 0) rcount = 1; // Should be valid value
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422 receivers_count_total += rcount;
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423 // Add the receiver to result data.
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424 result.add_receiver(receiver, rcount);
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425 // If we extend profiling to record methods,
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426 // we will set result._method also.
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427 }
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428 // Determine call site's morphism.
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429 // The call site count could be == (receivers_count_total + 1)
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430 // not only in the case of a polymorphic call but also in the case
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431 // when a method data snapshot is taken after the site count was updated
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432 // but before receivers counters were updated.
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433 if (morphism == result._limit) {
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434 // There were no array klasses and morphism <= MorphismLimit.
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435 if (morphism < ciCallProfile::MorphismLimit ||
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436 morphism == ciCallProfile::MorphismLimit &&
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437 (receivers_count_total+1) >= count) {
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438 result._morphism = morphism;
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439 }
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440 }
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441 // Make the count consistent if this is a call profile. If count is
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442 // zero or less, presume that this is a typecheck profile and
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443 // do nothing. Otherwise, increase count to be the sum of all
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444 // receiver's counts.
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445 if (count > 0) {
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446 if (count < receivers_count_total) {
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447 count = receivers_count_total;
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448 }
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449 }
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450 }
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451 result._count = count;
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452 }
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453 }
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454 return result;
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455 }
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456
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457 // ------------------------------------------------------------------
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458 // Add new receiver and sort data by receiver's profile count.
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459 void ciCallProfile::add_receiver(ciKlass* receiver, int receiver_count) {
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460 // Add new receiver and sort data by receiver's counts when we have space
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461 // for it otherwise replace the less called receiver (less called receiver
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462 // is placed to the last array element which is not used).
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463 // First array's element contains most called receiver.
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464 int i = _limit;
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465 for (; i > 0 && receiver_count > _receiver_count[i-1]; i--) {
|
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466 _receiver[i] = _receiver[i-1];
|
|
467 _receiver_count[i] = _receiver_count[i-1];
|
|
468 }
|
|
469 _receiver[i] = receiver;
|
|
470 _receiver_count[i] = receiver_count;
|
|
471 if (_limit < MorphismLimit) _limit++;
|
|
472 }
|
|
473
|
|
474 // ------------------------------------------------------------------
|
|
475 // ciMethod::find_monomorphic_target
|
|
476 //
|
|
477 // Given a certain calling environment, find the monomorphic target
|
|
478 // for the call. Return NULL if the call is not monomorphic in
|
|
479 // its calling environment, or if there are only abstract methods.
|
|
480 // The returned method is never abstract.
|
|
481 // Note: If caller uses a non-null result, it must inform dependencies
|
|
482 // via assert_unique_concrete_method or assert_leaf_type.
|
|
483 ciMethod* ciMethod::find_monomorphic_target(ciInstanceKlass* caller,
|
|
484 ciInstanceKlass* callee_holder,
|
|
485 ciInstanceKlass* actual_recv) {
|
|
486 check_is_loaded();
|
|
487
|
|
488 if (actual_recv->is_interface()) {
|
|
489 // %%% We cannot trust interface types, yet. See bug 6312651.
|
|
490 return NULL;
|
|
491 }
|
|
492
|
|
493 ciMethod* root_m = resolve_invoke(caller, actual_recv);
|
|
494 if (root_m == NULL) {
|
|
495 // Something went wrong looking up the actual receiver method.
|
|
496 return NULL;
|
|
497 }
|
|
498 assert(!root_m->is_abstract(), "resolve_invoke promise");
|
|
499
|
|
500 // Make certain quick checks even if UseCHA is false.
|
|
501
|
|
502 // Is it private or final?
|
|
503 if (root_m->can_be_statically_bound()) {
|
|
504 return root_m;
|
|
505 }
|
|
506
|
|
507 if (actual_recv->is_leaf_type() && actual_recv == root_m->holder()) {
|
|
508 // Easy case. There is no other place to put a method, so don't bother
|
|
509 // to go through the VM_ENTRY_MARK and all the rest.
|
|
510 return root_m;
|
|
511 }
|
|
512
|
|
513 // Array methods (clone, hashCode, etc.) are always statically bound.
|
|
514 // If we were to see an array type here, we'd return root_m.
|
|
515 // However, this method processes only ciInstanceKlasses. (See 4962591.)
|
|
516 // The inline_native_clone intrinsic narrows Object to T[] properly,
|
|
517 // so there is no need to do the same job here.
|
|
518
|
|
519 if (!UseCHA) return NULL;
|
|
520
|
|
521 VM_ENTRY_MARK;
|
|
522
|
|
523 methodHandle target;
|
|
524 {
|
|
525 MutexLocker locker(Compile_lock);
|
|
526 klassOop context = actual_recv->get_klassOop();
|
|
527 target = Dependencies::find_unique_concrete_method(context,
|
|
528 root_m->get_methodOop());
|
|
529 // %%% Should upgrade this ciMethod API to look for 1 or 2 concrete methods.
|
|
530 }
|
|
531
|
|
532 #ifndef PRODUCT
|
|
533 if (TraceDependencies && target() != NULL && target() != root_m->get_methodOop()) {
|
|
534 tty->print("found a non-root unique target method");
|
|
535 tty->print_cr(" context = %s", instanceKlass::cast(actual_recv->get_klassOop())->external_name());
|
|
536 tty->print(" method = ");
|
|
537 target->print_short_name(tty);
|
|
538 tty->cr();
|
|
539 }
|
|
540 #endif //PRODUCT
|
|
541
|
|
542 if (target() == NULL) {
|
|
543 return NULL;
|
|
544 }
|
|
545 if (target() == root_m->get_methodOop()) {
|
|
546 return root_m;
|
|
547 }
|
|
548 if (!root_m->is_public() &&
|
|
549 !root_m->is_protected()) {
|
|
550 // If we are going to reason about inheritance, it's easiest
|
|
551 // if the method in question is public, protected, or private.
|
|
552 // If the answer is not root_m, it is conservatively correct
|
|
553 // to return NULL, even if the CHA encountered irrelevant
|
|
554 // methods in other packages.
|
|
555 // %%% TO DO: Work out logic for package-private methods
|
|
556 // with the same name but different vtable indexes.
|
|
557 return NULL;
|
|
558 }
|
|
559 return CURRENT_THREAD_ENV->get_object(target())->as_method();
|
|
560 }
|
|
561
|
|
562 // ------------------------------------------------------------------
|
|
563 // ciMethod::resolve_invoke
|
|
564 //
|
|
565 // Given a known receiver klass, find the target for the call.
|
|
566 // Return NULL if the call has no target or the target is abstract.
|
|
567 ciMethod* ciMethod::resolve_invoke(ciKlass* caller, ciKlass* exact_receiver) {
|
|
568 check_is_loaded();
|
|
569 VM_ENTRY_MARK;
|
|
570
|
|
571 KlassHandle caller_klass (THREAD, caller->get_klassOop());
|
|
572 KlassHandle h_recv (THREAD, exact_receiver->get_klassOop());
|
|
573 KlassHandle h_resolved (THREAD, holder()->get_klassOop());
|
|
574 symbolHandle h_name (THREAD, name()->get_symbolOop());
|
|
575 symbolHandle h_signature (THREAD, signature()->get_symbolOop());
|
|
576
|
|
577 methodHandle m;
|
|
578 // Only do exact lookup if receiver klass has been linked. Otherwise,
|
|
579 // the vtable has not been setup, and the LinkResolver will fail.
|
|
580 if (h_recv->oop_is_javaArray()
|
|
581 ||
|
|
582 instanceKlass::cast(h_recv())->is_linked() && !exact_receiver->is_interface()) {
|
|
583 if (holder()->is_interface()) {
|
|
584 m = LinkResolver::resolve_interface_call_or_null(h_recv, h_resolved, h_name, h_signature, caller_klass);
|
|
585 } else {
|
|
586 m = LinkResolver::resolve_virtual_call_or_null(h_recv, h_resolved, h_name, h_signature, caller_klass);
|
|
587 }
|
|
588 }
|
|
589
|
|
590 if (m.is_null()) {
|
|
591 // Return NULL only if there was a problem with lookup (uninitialized class, etc.)
|
|
592 return NULL;
|
|
593 }
|
|
594
|
|
595 ciMethod* result = this;
|
|
596 if (m() != get_methodOop()) {
|
|
597 result = CURRENT_THREAD_ENV->get_object(m())->as_method();
|
|
598 }
|
|
599
|
|
600 // Don't return abstract methods because they aren't
|
|
601 // optimizable or interesting.
|
|
602 if (result->is_abstract()) {
|
|
603 return NULL;
|
|
604 } else {
|
|
605 return result;
|
|
606 }
|
|
607 }
|
|
608
|
|
609 // ------------------------------------------------------------------
|
|
610 // ciMethod::resolve_vtable_index
|
|
611 //
|
|
612 // Given a known receiver klass, find the vtable index for the call.
|
|
613 // Return methodOopDesc::invalid_vtable_index if the vtable_index is unknown.
|
|
614 int ciMethod::resolve_vtable_index(ciKlass* caller, ciKlass* receiver) {
|
|
615 check_is_loaded();
|
|
616
|
|
617 int vtable_index = methodOopDesc::invalid_vtable_index;
|
|
618 // Only do lookup if receiver klass has been linked. Otherwise,
|
|
619 // the vtable has not been setup, and the LinkResolver will fail.
|
|
620 if (!receiver->is_interface()
|
|
621 && (!receiver->is_instance_klass() ||
|
|
622 receiver->as_instance_klass()->is_linked())) {
|
|
623 VM_ENTRY_MARK;
|
|
624
|
|
625 KlassHandle caller_klass (THREAD, caller->get_klassOop());
|
|
626 KlassHandle h_recv (THREAD, receiver->get_klassOop());
|
|
627 symbolHandle h_name (THREAD, name()->get_symbolOop());
|
|
628 symbolHandle h_signature (THREAD, signature()->get_symbolOop());
|
|
629
|
|
630 vtable_index = LinkResolver::resolve_virtual_vtable_index(h_recv, h_recv, h_name, h_signature, caller_klass);
|
|
631 if (vtable_index == methodOopDesc::nonvirtual_vtable_index) {
|
|
632 // A statically bound method. Return "no such index".
|
|
633 vtable_index = methodOopDesc::invalid_vtable_index;
|
|
634 }
|
|
635 }
|
|
636
|
|
637 return vtable_index;
|
|
638 }
|
|
639
|
|
640 // ------------------------------------------------------------------
|
|
641 // ciMethod::interpreter_call_site_count
|
|
642 int ciMethod::interpreter_call_site_count(int bci) {
|
|
643 if (method_data() != NULL) {
|
|
644 ResourceMark rm;
|
|
645 ciProfileData* data = method_data()->bci_to_data(bci);
|
|
646 if (data != NULL && data->is_CounterData()) {
|
|
647 return scale_count(data->as_CounterData()->count());
|
|
648 }
|
|
649 }
|
|
650 return -1; // unknown
|
|
651 }
|
|
652
|
|
653 // ------------------------------------------------------------------
|
|
654 // Adjust a CounterData count to be commensurate with
|
|
655 // interpreter_invocation_count. If the MDO exists for
|
|
656 // only 25% of the time the method exists, then the
|
|
657 // counts in the MDO should be scaled by 4X, so that
|
|
658 // they can be usefully and stably compared against the
|
|
659 // invocation counts in methods.
|
|
660 int ciMethod::scale_count(int count, float prof_factor) {
|
|
661 if (count > 0 && method_data() != NULL) {
|
|
662 int current_mileage = method_data()->current_mileage();
|
|
663 int creation_mileage = method_data()->creation_mileage();
|
|
664 int counter_life = current_mileage - creation_mileage;
|
|
665 int method_life = interpreter_invocation_count();
|
|
666 // counter_life due to backedge_counter could be > method_life
|
|
667 if (counter_life > method_life)
|
|
668 counter_life = method_life;
|
|
669 if (0 < counter_life && counter_life <= method_life) {
|
|
670 count = (int)((double)count * prof_factor * method_life / counter_life + 0.5);
|
|
671 count = (count > 0) ? count : 1;
|
|
672 }
|
|
673 }
|
|
674 return count;
|
|
675 }
|
|
676
|
|
677 // ------------------------------------------------------------------
|
|
678 // ciMethod::build_method_data
|
|
679 //
|
|
680 // Generate new methodDataOop objects at compile time.
|
|
681 void ciMethod::build_method_data(methodHandle h_m) {
|
|
682 EXCEPTION_CONTEXT;
|
|
683 if (is_native() || is_abstract() || h_m()->is_accessor()) return;
|
|
684 if (h_m()->method_data() == NULL) {
|
|
685 methodOopDesc::build_interpreter_method_data(h_m, THREAD);
|
|
686 if (HAS_PENDING_EXCEPTION) {
|
|
687 CLEAR_PENDING_EXCEPTION;
|
|
688 }
|
|
689 }
|
|
690 if (h_m()->method_data() != NULL) {
|
|
691 _method_data = CURRENT_ENV->get_object(h_m()->method_data())->as_method_data();
|
|
692 _method_data->load_data();
|
|
693 } else {
|
|
694 _method_data = CURRENT_ENV->get_empty_methodData();
|
|
695 }
|
|
696 }
|
|
697
|
|
698 // public, retroactive version
|
|
699 void ciMethod::build_method_data() {
|
|
700 if (_method_data == NULL || _method_data->is_empty()) {
|
|
701 GUARDED_VM_ENTRY({
|
|
702 build_method_data(get_methodOop());
|
|
703 });
|
|
704 }
|
|
705 }
|
|
706
|
|
707
|
|
708 // ------------------------------------------------------------------
|
|
709 // ciMethod::method_data
|
|
710 //
|
|
711 ciMethodData* ciMethod::method_data() {
|
|
712 if (_method_data != NULL) {
|
|
713 return _method_data;
|
|
714 }
|
|
715 VM_ENTRY_MARK;
|
|
716 ciEnv* env = CURRENT_ENV;
|
|
717 Thread* my_thread = JavaThread::current();
|
|
718 methodHandle h_m(my_thread, get_methodOop());
|
|
719
|
|
720 if (Tier1UpdateMethodData && is_tier1_compile(env->comp_level())) {
|
|
721 build_method_data(h_m);
|
|
722 }
|
|
723
|
|
724 if (h_m()->method_data() != NULL) {
|
|
725 _method_data = CURRENT_ENV->get_object(h_m()->method_data())->as_method_data();
|
|
726 _method_data->load_data();
|
|
727 } else {
|
|
728 _method_data = CURRENT_ENV->get_empty_methodData();
|
|
729 }
|
|
730 return _method_data;
|
|
731
|
|
732 }
|
|
733
|
|
734
|
|
735 // ------------------------------------------------------------------
|
|
736 // ciMethod::will_link
|
|
737 //
|
|
738 // Will this method link in a specific calling context?
|
|
739 bool ciMethod::will_link(ciKlass* accessing_klass,
|
|
740 ciKlass* declared_method_holder,
|
|
741 Bytecodes::Code bc) {
|
|
742 if (!is_loaded()) {
|
|
743 // Method lookup failed.
|
|
744 return false;
|
|
745 }
|
|
746
|
|
747 // The link checks have been front-loaded into the get_method
|
|
748 // call. This method (ciMethod::will_link()) will be removed
|
|
749 // in the future.
|
|
750
|
|
751 return true;
|
|
752 }
|
|
753
|
|
754 // ------------------------------------------------------------------
|
|
755 // ciMethod::should_exclude
|
|
756 //
|
|
757 // Should this method be excluded from compilation?
|
|
758 bool ciMethod::should_exclude() {
|
|
759 check_is_loaded();
|
|
760 VM_ENTRY_MARK;
|
|
761 methodHandle mh(THREAD, get_methodOop());
|
|
762 bool ignore;
|
|
763 return CompilerOracle::should_exclude(mh, ignore);
|
|
764 }
|
|
765
|
|
766 // ------------------------------------------------------------------
|
|
767 // ciMethod::should_inline
|
|
768 //
|
|
769 // Should this method be inlined during compilation?
|
|
770 bool ciMethod::should_inline() {
|
|
771 check_is_loaded();
|
|
772 VM_ENTRY_MARK;
|
|
773 methodHandle mh(THREAD, get_methodOop());
|
|
774 return CompilerOracle::should_inline(mh);
|
|
775 }
|
|
776
|
|
777 // ------------------------------------------------------------------
|
|
778 // ciMethod::should_not_inline
|
|
779 //
|
|
780 // Should this method be disallowed from inlining during compilation?
|
|
781 bool ciMethod::should_not_inline() {
|
|
782 check_is_loaded();
|
|
783 VM_ENTRY_MARK;
|
|
784 methodHandle mh(THREAD, get_methodOop());
|
|
785 return CompilerOracle::should_not_inline(mh);
|
|
786 }
|
|
787
|
|
788 // ------------------------------------------------------------------
|
|
789 // ciMethod::should_print_assembly
|
|
790 //
|
|
791 // Should the compiler print the generated code for this method?
|
|
792 bool ciMethod::should_print_assembly() {
|
|
793 check_is_loaded();
|
|
794 VM_ENTRY_MARK;
|
|
795 methodHandle mh(THREAD, get_methodOop());
|
|
796 return CompilerOracle::should_print(mh);
|
|
797 }
|
|
798
|
|
799 // ------------------------------------------------------------------
|
|
800 // ciMethod::break_at_execute
|
|
801 //
|
|
802 // Should the compiler insert a breakpoint into the generated code
|
|
803 // method?
|
|
804 bool ciMethod::break_at_execute() {
|
|
805 check_is_loaded();
|
|
806 VM_ENTRY_MARK;
|
|
807 methodHandle mh(THREAD, get_methodOop());
|
|
808 return CompilerOracle::should_break_at(mh);
|
|
809 }
|
|
810
|
|
811 // ------------------------------------------------------------------
|
|
812 // ciMethod::has_option
|
|
813 //
|
|
814 bool ciMethod::has_option(const char* option) {
|
|
815 check_is_loaded();
|
|
816 VM_ENTRY_MARK;
|
|
817 methodHandle mh(THREAD, get_methodOop());
|
|
818 return CompilerOracle::has_option_string(mh, option);
|
|
819 }
|
|
820
|
|
821 // ------------------------------------------------------------------
|
|
822 // ciMethod::can_be_compiled
|
|
823 //
|
|
824 // Have previous compilations of this method succeeded?
|
|
825 bool ciMethod::can_be_compiled() {
|
|
826 check_is_loaded();
|
|
827 return _is_compilable;
|
|
828 }
|
|
829
|
|
830 // ------------------------------------------------------------------
|
|
831 // ciMethod::set_not_compilable
|
|
832 //
|
|
833 // Tell the VM that this method cannot be compiled at all.
|
|
834 void ciMethod::set_not_compilable() {
|
|
835 check_is_loaded();
|
|
836 VM_ENTRY_MARK;
|
|
837 _is_compilable = false;
|
|
838 get_methodOop()->set_not_compilable();
|
|
839 }
|
|
840
|
|
841 // ------------------------------------------------------------------
|
|
842 // ciMethod::can_be_osr_compiled
|
|
843 //
|
|
844 // Have previous compilations of this method succeeded?
|
|
845 //
|
|
846 // Implementation note: the VM does not currently keep track
|
|
847 // of failed OSR compilations per bci. The entry_bci parameter
|
|
848 // is currently unused.
|
|
849 bool ciMethod::can_be_osr_compiled(int entry_bci) {
|
|
850 check_is_loaded();
|
|
851 VM_ENTRY_MARK;
|
|
852 return !get_methodOop()->access_flags().is_not_osr_compilable();
|
|
853 }
|
|
854
|
|
855 // ------------------------------------------------------------------
|
|
856 // ciMethod::has_compiled_code
|
|
857 bool ciMethod::has_compiled_code() {
|
|
858 VM_ENTRY_MARK;
|
|
859 return get_methodOop()->code() != NULL;
|
|
860 }
|
|
861
|
|
862 // ------------------------------------------------------------------
|
|
863 // ciMethod::instructions_size
|
|
864 // This is a rough metric for "fat" methods, compared
|
|
865 // before inlining with InlineSmallCode.
|
|
866 // The CodeBlob::instructions_size accessor includes
|
|
867 // junk like exception handler, stubs, and constant table,
|
|
868 // which are not highly relevant to an inlined method.
|
|
869 // So we use the more specific accessor nmethod::code_size.
|
|
870 int ciMethod::instructions_size() {
|
|
871 GUARDED_VM_ENTRY(
|
|
872 nmethod* code = get_methodOop()->code();
|
|
873 // if there's no compiled code or the code was produced by the
|
|
874 // tier1 profiler return 0 for the code size. This should
|
|
875 // probably be based on the compilation level of the nmethod but
|
|
876 // that currently isn't properly recorded.
|
|
877 if (code == NULL ||
|
|
878 (TieredCompilation && code->compiler() != NULL && code->compiler()->is_c1())) {
|
|
879 return 0;
|
|
880 }
|
|
881 return code->code_size();
|
|
882 )
|
|
883 }
|
|
884
|
|
885 // ------------------------------------------------------------------
|
|
886 // ciMethod::log_nmethod_identity
|
|
887 void ciMethod::log_nmethod_identity(xmlStream* log) {
|
|
888 GUARDED_VM_ENTRY(
|
|
889 nmethod* code = get_methodOop()->code();
|
|
890 if (code != NULL) {
|
|
891 code->log_identity(log);
|
|
892 }
|
|
893 )
|
|
894 }
|
|
895
|
|
896 // ------------------------------------------------------------------
|
|
897 // ciMethod::is_not_reached
|
|
898 bool ciMethod::is_not_reached(int bci) {
|
|
899 check_is_loaded();
|
|
900 VM_ENTRY_MARK;
|
|
901 return Interpreter::is_not_reached(
|
|
902 methodHandle(THREAD, get_methodOop()), bci);
|
|
903 }
|
|
904
|
|
905 // ------------------------------------------------------------------
|
|
906 // ciMethod::was_never_executed
|
|
907 bool ciMethod::was_executed_more_than(int times) {
|
|
908 VM_ENTRY_MARK;
|
|
909 return get_methodOop()->was_executed_more_than(times);
|
|
910 }
|
|
911
|
|
912 // ------------------------------------------------------------------
|
|
913 // ciMethod::has_unloaded_classes_in_signature
|
|
914 bool ciMethod::has_unloaded_classes_in_signature() {
|
|
915 VM_ENTRY_MARK;
|
|
916 {
|
|
917 EXCEPTION_MARK;
|
|
918 methodHandle m(THREAD, get_methodOop());
|
|
919 bool has_unloaded = methodOopDesc::has_unloaded_classes_in_signature(m, (JavaThread *)THREAD);
|
|
920 if( HAS_PENDING_EXCEPTION ) {
|
|
921 CLEAR_PENDING_EXCEPTION;
|
|
922 return true; // Declare that we may have unloaded classes
|
|
923 }
|
|
924 return has_unloaded;
|
|
925 }
|
|
926 }
|
|
927
|
|
928 // ------------------------------------------------------------------
|
|
929 // ciMethod::is_klass_loaded
|
|
930 bool ciMethod::is_klass_loaded(int refinfo_index, bool must_be_resolved) const {
|
|
931 VM_ENTRY_MARK;
|
|
932 return get_methodOop()->is_klass_loaded(refinfo_index, must_be_resolved);
|
|
933 }
|
|
934
|
|
935 // ------------------------------------------------------------------
|
|
936 // ciMethod::check_call
|
|
937 bool ciMethod::check_call(int refinfo_index, bool is_static) const {
|
|
938 VM_ENTRY_MARK;
|
|
939 {
|
|
940 EXCEPTION_MARK;
|
|
941 HandleMark hm(THREAD);
|
|
942 constantPoolHandle pool (THREAD, get_methodOop()->constants());
|
|
943 methodHandle spec_method;
|
|
944 KlassHandle spec_klass;
|
|
945 LinkResolver::resolve_method(spec_method, spec_klass, pool, refinfo_index, THREAD);
|
|
946 if (HAS_PENDING_EXCEPTION) {
|
|
947 CLEAR_PENDING_EXCEPTION;
|
|
948 return false;
|
|
949 } else {
|
|
950 return (spec_method->is_static() == is_static);
|
|
951 }
|
|
952 }
|
|
953 return false;
|
|
954 }
|
|
955
|
|
956 // ------------------------------------------------------------------
|
|
957 // ciMethod::print_codes
|
|
958 //
|
|
959 // Print the bytecodes for this method.
|
|
960 void ciMethod::print_codes_on(outputStream* st) {
|
|
961 check_is_loaded();
|
|
962 GUARDED_VM_ENTRY(get_methodOop()->print_codes_on(st);)
|
|
963 }
|
|
964
|
|
965
|
|
966 #define FETCH_FLAG_FROM_VM(flag_accessor) { \
|
|
967 check_is_loaded(); \
|
|
968 VM_ENTRY_MARK; \
|
|
969 return get_methodOop()->flag_accessor(); \
|
|
970 }
|
|
971
|
|
972 bool ciMethod::is_empty_method() const { FETCH_FLAG_FROM_VM(is_empty_method); }
|
|
973 bool ciMethod::is_vanilla_constructor() const { FETCH_FLAG_FROM_VM(is_vanilla_constructor); }
|
|
974 bool ciMethod::has_loops () const { FETCH_FLAG_FROM_VM(has_loops); }
|
|
975 bool ciMethod::has_jsrs () const { FETCH_FLAG_FROM_VM(has_jsrs); }
|
|
976 bool ciMethod::is_accessor () const { FETCH_FLAG_FROM_VM(is_accessor); }
|
|
977 bool ciMethod::is_initializer () const { FETCH_FLAG_FROM_VM(is_initializer); }
|
|
978
|
|
979 BCEscapeAnalyzer *ciMethod::get_bcea() {
|
|
980 if (_bcea == NULL) {
|
|
981 _bcea = new (CURRENT_ENV->arena()) BCEscapeAnalyzer(this, NULL);
|
|
982 }
|
|
983 return _bcea;
|
|
984 }
|
|
985
|
|
986 ciMethodBlocks *ciMethod::get_method_blocks() {
|
|
987 Arena *arena = CURRENT_ENV->arena();
|
|
988 if (_method_blocks == NULL) {
|
|
989 _method_blocks = new (arena) ciMethodBlocks(arena, this);
|
|
990 }
|
|
991 return _method_blocks;
|
|
992 }
|
|
993
|
|
994 #undef FETCH_FLAG_FROM_VM
|
|
995
|
|
996
|
|
997 // ------------------------------------------------------------------
|
|
998 // ciMethod::print_codes
|
|
999 //
|
|
1000 // Print a range of the bytecodes for this method.
|
|
1001 void ciMethod::print_codes_on(int from, int to, outputStream* st) {
|
|
1002 check_is_loaded();
|
|
1003 GUARDED_VM_ENTRY(get_methodOop()->print_codes_on(from, to, st);)
|
|
1004 }
|
|
1005
|
|
1006 // ------------------------------------------------------------------
|
|
1007 // ciMethod::print_name
|
|
1008 //
|
|
1009 // Print the name of this method, including signature and some flags.
|
|
1010 void ciMethod::print_name(outputStream* st) {
|
|
1011 check_is_loaded();
|
|
1012 GUARDED_VM_ENTRY(get_methodOop()->print_name(st);)
|
|
1013 }
|
|
1014
|
|
1015 // ------------------------------------------------------------------
|
|
1016 // ciMethod::print_short_name
|
|
1017 //
|
|
1018 // Print the name of this method, without signature.
|
|
1019 void ciMethod::print_short_name(outputStream* st) {
|
|
1020 check_is_loaded();
|
|
1021 GUARDED_VM_ENTRY(get_methodOop()->print_short_name(st);)
|
|
1022 }
|
|
1023
|
|
1024 // ------------------------------------------------------------------
|
|
1025 // ciMethod::print_impl
|
|
1026 //
|
|
1027 // Implementation of the print method.
|
|
1028 void ciMethod::print_impl(outputStream* st) {
|
|
1029 ciObject::print_impl(st);
|
|
1030 st->print(" name=");
|
|
1031 name()->print_symbol_on(st);
|
|
1032 st->print(" holder=");
|
|
1033 holder()->print_name_on(st);
|
|
1034 st->print(" signature=");
|
|
1035 signature()->as_symbol()->print_symbol_on(st);
|
|
1036 if (is_loaded()) {
|
|
1037 st->print(" loaded=true flags=");
|
|
1038 flags().print_member_flags(st);
|
|
1039 } else {
|
|
1040 st->print(" loaded=false");
|
|
1041 }
|
|
1042 }
|