0
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1 /*
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2 * Copyright 1997-2006 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/_compiledIC.cpp.incl"
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27
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28
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29 // Every time a compiled IC is changed or its type is being accessed,
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30 // either the CompiledIC_lock must be set or we must be at a safe point.
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31
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32 //-----------------------------------------------------------------------------
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33 // Low-level access to an inline cache. Private, since they might not be
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34 // MT-safe to use.
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35
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36 void CompiledIC::set_cached_oop(oop cache) {
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37 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
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38 assert (!is_optimized(), "an optimized virtual call does not have a cached oop");
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39 assert (cache == NULL || cache != badOop, "invalid oop");
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40
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41 if (TraceCompiledIC) {
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42 tty->print(" ");
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43 print_compiled_ic();
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44 tty->print_cr(" changing oop to " INTPTR_FORMAT, (address)cache);
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45 }
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46
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47 if (cache == NULL) cache = (oop)Universe::non_oop_word();
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48
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49 *_oop_addr = cache;
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50 // fix up the relocations
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51 RelocIterator iter = _oops;
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52 while (iter.next()) {
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53 if (iter.type() == relocInfo::oop_type) {
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54 oop_Relocation* r = iter.oop_reloc();
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55 if (r->oop_addr() == _oop_addr)
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56 r->fix_oop_relocation();
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57 }
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58 }
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59 return;
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60 }
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61
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62
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63 oop CompiledIC::cached_oop() const {
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64 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
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65 assert (!is_optimized(), "an optimized virtual call does not have a cached oop");
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66
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67 if (!is_in_transition_state()) {
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68 oop data = *_oop_addr;
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69 // If we let the oop value here be initialized to zero...
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70 assert(data != NULL || Universe::non_oop_word() == NULL,
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71 "no raw nulls in CompiledIC oops, because of patching races");
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72 return (data == (oop)Universe::non_oop_word()) ? (oop)NULL : data;
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73 } else {
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74 return InlineCacheBuffer::cached_oop_for((CompiledIC *)this);
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75 }
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76 }
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77
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78
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79 void CompiledIC::set_ic_destination(address entry_point) {
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80 assert(entry_point != NULL, "must set legal entry point");
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81 assert(CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
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82 if (TraceCompiledIC) {
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83 tty->print(" ");
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84 print_compiled_ic();
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85 tty->print_cr(" changing destination to " INTPTR_FORMAT, entry_point);
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86 }
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87 MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag);
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88 #ifdef ASSERT
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89 CodeBlob* cb = CodeCache::find_blob_unsafe(_ic_call);
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90 assert(cb != NULL && cb->is_nmethod(), "must be nmethod");
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91 #endif
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92 _ic_call->set_destination_mt_safe(entry_point);
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93 }
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94
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95
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96 address CompiledIC::ic_destination() const {
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97 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
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98 if (!is_in_transition_state()) {
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99 return _ic_call->destination();
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100 } else {
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101 return InlineCacheBuffer::ic_destination_for((CompiledIC *)this);
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102 }
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103 }
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104
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105
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106 bool CompiledIC::is_in_transition_state() const {
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107 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
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108 return InlineCacheBuffer::contains(_ic_call->destination());
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109 }
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110
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111
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112 // Returns native address of 'call' instruction in inline-cache. Used by
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113 // the InlineCacheBuffer when it needs to find the stub.
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114 address CompiledIC::stub_address() const {
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115 assert(is_in_transition_state(), "should only be called when we are in a transition state");
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116 return _ic_call->destination();
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117 }
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118
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119
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120 //-----------------------------------------------------------------------------
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121 // High-level access to an inline cache. Guaranteed to be MT-safe.
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122
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123
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124 void CompiledIC::set_to_megamorphic(CallInfo* call_info, Bytecodes::Code bytecode, TRAPS) {
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125 methodHandle method = call_info->selected_method();
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126 bool is_invoke_interface = (bytecode == Bytecodes::_invokeinterface && !call_info->has_vtable_index());
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127 assert(CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
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128 assert(method->is_oop(), "cannot be NULL and must be oop");
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129 assert(!is_optimized(), "cannot set an optimized virtual call to megamorphic");
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130 assert(is_call_to_compiled() || is_call_to_interpreted(), "going directly to megamorphic?");
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131
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132 address entry;
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133 if (is_invoke_interface) {
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134 int index = klassItable::compute_itable_index(call_info->resolved_method()());
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135 entry = VtableStubs::create_stub(false, index, method());
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136 assert(entry != NULL, "entry not computed");
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137 klassOop k = call_info->resolved_method()->method_holder();
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138 assert(Klass::cast(k)->is_interface(), "sanity check");
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139 InlineCacheBuffer::create_transition_stub(this, k, entry);
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140 } else {
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141 // Can be different than method->vtable_index(), due to package-private etc.
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142 int vtable_index = call_info->vtable_index();
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143 entry = VtableStubs::create_stub(true, vtable_index, method());
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144 InlineCacheBuffer::create_transition_stub(this, method(), entry);
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145 }
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146
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147 if (TraceICs) {
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148 ResourceMark rm;
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149 tty->print_cr ("IC@" INTPTR_FORMAT ": to megamorphic %s entry: " INTPTR_FORMAT,
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150 instruction_address(), method->print_value_string(), entry);
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151 }
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152
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153 Events::log("compiledIC " INTPTR_FORMAT " --> megamorphic " INTPTR_FORMAT, this, (address)method());
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154 // We can't check this anymore. With lazy deopt we could have already
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155 // cleaned this IC entry before we even return. This is possible if
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156 // we ran out of space in the inline cache buffer trying to do the
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157 // set_next and we safepointed to free up space. This is a benign
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158 // race because the IC entry was complete when we safepointed so
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159 // cleaning it immediately is harmless.
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160 // assert(is_megamorphic(), "sanity check");
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161 }
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162
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163
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164 // true if destination is megamorphic stub
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165 bool CompiledIC::is_megamorphic() const {
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166 assert(CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
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167 assert(!is_optimized(), "an optimized call cannot be megamorphic");
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168
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169 // Cannot rely on cached_oop. It is either an interface or a method.
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170 return VtableStubs::is_entry_point(ic_destination());
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171 }
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172
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173 bool CompiledIC::is_call_to_compiled() const {
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174 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
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175
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176 // Use unsafe, since an inline cache might point to a zombie method. However, the zombie
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177 // method is guaranteed to still exist, since we only remove methods after all inline caches
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178 // has been cleaned up
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179 CodeBlob* cb = CodeCache::find_blob_unsafe(ic_destination());
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180 bool is_monomorphic = (cb != NULL && cb->is_nmethod());
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181 // Check that the cached_oop is a klass for non-optimized monomorphic calls
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182 // This assertion is invalid for compiler1: a call that does not look optimized (no static stub) can be used
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183 // for calling directly to vep without using the inline cache (i.e., cached_oop == NULL)
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184 #ifdef ASSERT
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185 #ifdef TIERED
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186 CodeBlob* caller = CodeCache::find_blob_unsafe(instruction_address());
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187 bool is_c1_method = caller->is_compiled_by_c1();
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188 #else
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189 #ifdef COMPILER1
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190 bool is_c1_method = true;
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191 #else
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192 bool is_c1_method = false;
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193 #endif // COMPILER1
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194 #endif // TIERED
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195 assert( is_c1_method ||
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196 !is_monomorphic ||
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197 is_optimized() ||
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198 (cached_oop() != NULL && cached_oop()->is_klass()), "sanity check");
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199 #endif // ASSERT
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200 return is_monomorphic;
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201 }
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202
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203
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204 bool CompiledIC::is_call_to_interpreted() const {
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205 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
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206 // Call to interpreter if destination is either calling to a stub (if it
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207 // is optimized), or calling to an I2C blob
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208 bool is_call_to_interpreted = false;
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209 if (!is_optimized()) {
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210 // must use unsafe because the destination can be a zombie (and we're cleaning)
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211 // and the print_compiled_ic code wants to know if site (in the non-zombie)
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212 // is to the interpreter.
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213 CodeBlob* cb = CodeCache::find_blob_unsafe(ic_destination());
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214 is_call_to_interpreted = (cb != NULL && cb->is_adapter_blob());
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215 assert(!is_call_to_interpreted || (cached_oop() != NULL && cached_oop()->is_compiledICHolder()), "sanity check");
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216 } else {
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217 // Check if we are calling into our own codeblob (i.e., to a stub)
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218 CodeBlob* cb = CodeCache::find_blob(_ic_call->instruction_address());
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219 address dest = ic_destination();
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220 #ifdef ASSERT
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221 {
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222 CodeBlob* db = CodeCache::find_blob_unsafe(dest);
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223 assert(!db->is_adapter_blob(), "must use stub!");
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224 }
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225 #endif /* ASSERT */
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226 is_call_to_interpreted = cb->contains(dest);
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227 }
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228 return is_call_to_interpreted;
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229 }
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230
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231
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232 void CompiledIC::set_to_clean() {
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233 assert(SafepointSynchronize::is_at_safepoint() || CompiledIC_lock->is_locked() , "MT-unsafe call");
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234 if (TraceInlineCacheClearing || TraceICs) {
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235 tty->print_cr("IC@" INTPTR_FORMAT ": set to clean", instruction_address());
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236 print();
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237 }
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238
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239 address entry;
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240 if (is_optimized()) {
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241 entry = SharedRuntime::get_resolve_opt_virtual_call_stub();
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242 } else {
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243 entry = SharedRuntime::get_resolve_virtual_call_stub();
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244 }
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245
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246 // A zombie transition will always be safe, since the oop has already been set to NULL, so
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247 // we only need to patch the destination
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248 bool safe_transition = is_optimized() || SafepointSynchronize::is_at_safepoint();
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249
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250 if (safe_transition) {
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251 if (!is_optimized()) set_cached_oop(NULL);
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252 // Kill any leftover stub we might have too
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253 if (is_in_transition_state()) {
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254 ICStub* old_stub = ICStub_from_destination_address(stub_address());
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255 old_stub->clear();
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256 }
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257 set_ic_destination(entry);
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258 } else {
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259 // Unsafe transition - create stub.
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260 InlineCacheBuffer::create_transition_stub(this, NULL, entry);
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261 }
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262 // We can't check this anymore. With lazy deopt we could have already
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263 // cleaned this IC entry before we even return. This is possible if
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264 // we ran out of space in the inline cache buffer trying to do the
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265 // set_next and we safepointed to free up space. This is a benign
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266 // race because the IC entry was complete when we safepointed so
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267 // cleaning it immediately is harmless.
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268 // assert(is_clean(), "sanity check");
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269 }
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270
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271
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272 bool CompiledIC::is_clean() const {
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273 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
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274 bool is_clean = false;
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275 address dest = ic_destination();
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276 is_clean = dest == SharedRuntime::get_resolve_opt_virtual_call_stub() ||
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277 dest == SharedRuntime::get_resolve_virtual_call_stub();
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278 assert(!is_clean || is_optimized() || cached_oop() == NULL, "sanity check");
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279 return is_clean;
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280 }
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281
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282
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283 void CompiledIC::set_to_monomorphic(const CompiledICInfo& info) {
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284 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
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285 // Updating a cache to the wrong entry can cause bugs that are very hard
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286 // to track down - if cache entry gets invalid - we just clean it. In
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287 // this way it is always the same code path that is responsible for
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288 // updating and resolving an inline cache
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289 //
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290 // The above is no longer true. SharedRuntime::fixup_callers_callsite will change optimized
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291 // callsites. In addition ic_miss code will update a site to monomorphic if it determines
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292 // that an monomorphic call to the interpreter can now be monomorphic to compiled code.
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293 //
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294 // In both of these cases the only thing being modifed is the jump/call target and these
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295 // transitions are mt_safe
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296
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297 Thread *thread = Thread::current();
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298 if (info._to_interpreter) {
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299 // Call to interpreter
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300 if (info.is_optimized() && is_optimized()) {
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301 assert(is_clean(), "unsafe IC path");
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302 MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag);
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303 // the call analysis (callee structure) specifies that the call is optimized
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304 // (either because of CHA or the static target is final)
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305 // At code generation time, this call has been emitted as static call
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306 // Call via stub
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307 assert(info.cached_oop().not_null() && info.cached_oop()->is_method(), "sanity check");
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308 CompiledStaticCall* csc = compiledStaticCall_at(instruction_address());
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309 methodHandle method (thread, (methodOop)info.cached_oop()());
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310 csc->set_to_interpreted(method, info.entry());
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311 if (TraceICs) {
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312 ResourceMark rm(thread);
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313 tty->print_cr ("IC@" INTPTR_FORMAT ": monomorphic to interpreter: %s",
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314 instruction_address(),
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315 method->print_value_string());
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316 }
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317 } else {
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318 // Call via method-klass-holder
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319 assert(info.cached_oop().not_null(), "must be set");
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320 InlineCacheBuffer::create_transition_stub(this, info.cached_oop()(), info.entry());
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321
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322 if (TraceICs) {
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323 ResourceMark rm(thread);
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324 tty->print_cr ("IC@" INTPTR_FORMAT ": monomorphic to interpreter via mkh", instruction_address());
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325 }
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326 }
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327 } else {
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328 // Call to compiled code
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329 bool static_bound = info.is_optimized() || (info.cached_oop().is_null());
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330 #ifdef ASSERT
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331 CodeBlob* cb = CodeCache::find_blob_unsafe(info.entry());
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332 assert (cb->is_nmethod(), "must be compiled!");
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333 #endif /* ASSERT */
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334
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335 // This is MT safe if we come from a clean-cache and go through a
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336 // non-verified entry point
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337 bool safe = SafepointSynchronize::is_at_safepoint() ||
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338 (!is_in_transition_state() && (info.is_optimized() || static_bound || is_clean()));
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339
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340 if (!safe) {
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341 InlineCacheBuffer::create_transition_stub(this, info.cached_oop()(), info.entry());
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342 } else {
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343 set_ic_destination(info.entry());
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344 if (!is_optimized()) set_cached_oop(info.cached_oop()());
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345 }
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346
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347 if (TraceICs) {
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348 ResourceMark rm(thread);
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349 assert(info.cached_oop() == NULL || info.cached_oop()()->is_klass(), "must be");
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350 tty->print_cr ("IC@" INTPTR_FORMAT ": monomorphic to compiled (rcvr klass) %s: %s",
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351 instruction_address(),
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352 ((klassOop)info.cached_oop()())->print_value_string(),
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353 (safe) ? "" : "via stub");
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354 }
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355 }
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356 // We can't check this anymore. With lazy deopt we could have already
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357 // cleaned this IC entry before we even return. This is possible if
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358 // we ran out of space in the inline cache buffer trying to do the
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359 // set_next and we safepointed to free up space. This is a benign
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360 // race because the IC entry was complete when we safepointed so
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361 // cleaning it immediately is harmless.
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362 // assert(is_call_to_compiled() || is_call_to_interpreted(), "sanity check");
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363 }
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364
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365
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366 // is_optimized: Compiler has generated an optimized call (i.e., no inline
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367 // cache) static_bound: The call can be static bound (i.e, no need to use
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368 // inline cache)
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369 void CompiledIC::compute_monomorphic_entry(methodHandle method,
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370 KlassHandle receiver_klass,
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371 bool is_optimized,
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372 bool static_bound,
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373 CompiledICInfo& info,
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374 TRAPS) {
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375 info._is_optimized = is_optimized;
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376
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377 nmethod* method_code = method->code();
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378 address entry = NULL;
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379 if (method_code != NULL) {
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380 // Call to compiled code
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381 if (static_bound || is_optimized) {
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382 entry = method_code->verified_entry_point();
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383 } else {
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384 entry = method_code->entry_point();
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385 }
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386 }
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387 if (entry != NULL) {
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388 // Call to compiled code
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389 info._entry = entry;
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390 if (static_bound || is_optimized) {
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391 info._cached_oop = Handle(THREAD, (oop)NULL);
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392 } else {
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393 info._cached_oop = receiver_klass;
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394 }
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395 info._to_interpreter = false;
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396 } else {
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397 // Note: the following problem exists with Compiler1:
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398 // - at compile time we may or may not know if the destination is final
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399 // - if we know that the destination is final, we will emit an optimized
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400 // virtual call (no inline cache), and need a methodOop to make a call
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401 // to the interpreter
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402 // - if we do not know if the destination is final, we emit a standard
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403 // virtual call, and use CompiledICHolder to call interpreted code
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404 // (no static call stub has been generated)
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405 // However in that case we will now notice it is static_bound
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406 // and convert the call into what looks to be an optimized
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407 // virtual call. This causes problems in verifying the IC because
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408 // it look vanilla but is optimized. Code in is_call_to_interpreted
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409 // is aware of this and weakens its asserts.
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410
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411 info._to_interpreter = true;
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412 // static_bound should imply is_optimized -- otherwise we have a
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413 // performance bug (statically-bindable method is called via
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414 // dynamically-dispatched call note: the reverse implication isn't
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415 // necessarily true -- the call may have been optimized based on compiler
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416 // analysis (static_bound is only based on "final" etc.)
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417 #ifdef COMPILER2
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418 #ifdef TIERED
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419 #if defined(ASSERT)
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420 // can't check the assert because we don't have the CompiledIC with which to
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421 // find the address if the call instruction.
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422 //
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423 // CodeBlob* cb = find_blob_unsafe(instruction_address());
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424 // assert(cb->is_compiled_by_c1() || !static_bound || is_optimized, "static_bound should imply is_optimized");
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425 #endif // ASSERT
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426 #else
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427 assert(!static_bound || is_optimized, "static_bound should imply is_optimized");
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428 #endif // TIERED
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429 #endif // COMPILER2
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430 if (is_optimized) {
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431 // Use stub entry
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432 info._entry = method()->get_c2i_entry();
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433 info._cached_oop = method;
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434 } else {
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435 // Use mkh entry
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436 oop holder = oopFactory::new_compiledICHolder(method, receiver_klass, CHECK);
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437 info._cached_oop = Handle(THREAD, holder);
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438 info._entry = method()->get_c2i_unverified_entry();
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439 }
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440 }
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441 }
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442
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443
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444 inline static RelocIterator parse_ic(CodeBlob* code, address ic_call, oop* &_oop_addr, bool *is_optimized) {
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445 address first_oop = NULL;
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446 // Mergers please note: Sun SC5.x CC insists on an lvalue for a reference parameter.
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447 CodeBlob *code1 = code;
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448 return virtual_call_Relocation::parse_ic(code1, ic_call, first_oop, _oop_addr, is_optimized);
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449 }
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450
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451 CompiledIC::CompiledIC(NativeCall* ic_call)
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452 : _ic_call(ic_call),
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453 _oops(parse_ic(NULL, ic_call->instruction_address(), _oop_addr, &_is_optimized))
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454 {
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455 }
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456
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457
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458 CompiledIC::CompiledIC(Relocation* ic_reloc)
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459 : _ic_call(nativeCall_at(ic_reloc->addr())),
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460 _oops(parse_ic(ic_reloc->code(), ic_reloc->addr(), _oop_addr, &_is_optimized))
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461 {
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462 assert(ic_reloc->type() == relocInfo::virtual_call_type ||
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463 ic_reloc->type() == relocInfo::opt_virtual_call_type, "wrong reloc. info");
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464 }
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465
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466
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467 // ----------------------------------------------------------------------------
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468
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469 void CompiledStaticCall::set_to_clean() {
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470 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "mt unsafe call");
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471 // Reset call site
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472 MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag);
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473 #ifdef ASSERT
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474 CodeBlob* cb = CodeCache::find_blob_unsafe(this);
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475 assert(cb != NULL && cb->is_nmethod(), "must be nmethod");
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476 #endif
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477 set_destination_mt_safe(SharedRuntime::get_resolve_static_call_stub());
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478
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479 // Do not reset stub here: It is too expensive to call find_stub.
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480 // Instead, rely on caller (nmethod::clear_inline_caches) to clear
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481 // both the call and its stub.
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482 }
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483
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484
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485 bool CompiledStaticCall::is_clean() const {
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486 return destination() == SharedRuntime::get_resolve_static_call_stub();
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487 }
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488
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489 bool CompiledStaticCall::is_call_to_compiled() const {
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490 return CodeCache::contains(destination());
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491 }
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492
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493
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494 bool CompiledStaticCall::is_call_to_interpreted() const {
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495 // It is a call to interpreted, if it calls to a stub. Hence, the destination
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496 // must be in the stub part of the nmethod that contains the call
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497 nmethod* nm = CodeCache::find_nmethod(instruction_address());
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498 return nm->stub_contains(destination());
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499 }
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500
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501
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502 void CompiledStaticCall::set_to_interpreted(methodHandle callee, address entry) {
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503 address stub=find_stub();
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504 assert(stub!=NULL, "stub not found");
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505
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506 if (TraceICs) {
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507 ResourceMark rm;
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508 tty->print_cr("CompiledStaticCall@" INTPTR_FORMAT ": set_to_interpreted %s",
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509 instruction_address(),
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510 callee->name_and_sig_as_C_string());
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511 }
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512
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513 NativeMovConstReg* method_holder = nativeMovConstReg_at(stub); // creation also verifies the object
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514 NativeJump* jump = nativeJump_at(method_holder->next_instruction_address());
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515
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516 assert(method_holder->data() == 0 || method_holder->data() == (intptr_t)callee(), "a) MT-unsafe modification of inline cache");
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517 assert(jump->jump_destination() == (address)-1 || jump->jump_destination() == entry, "b) MT-unsafe modification of inline cache");
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518
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519 // Update stub
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520 method_holder->set_data((intptr_t)callee());
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521 jump->set_jump_destination(entry);
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522
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523 // Update jump to call
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524 set_destination_mt_safe(stub);
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525 }
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526
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527
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528 void CompiledStaticCall::set(const StaticCallInfo& info) {
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529 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "mt unsafe call");
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530 MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag);
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531 // Updating a cache to the wrong entry can cause bugs that are very hard
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532 // to track down - if cache entry gets invalid - we just clean it. In
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533 // this way it is always the same code path that is responsible for
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534 // updating and resolving an inline cache
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535 assert(is_clean(), "do not update a call entry - use clean");
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536
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537 if (info._to_interpreter) {
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538 // Call to interpreted code
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539 set_to_interpreted(info.callee(), info.entry());
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540 } else {
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541 if (TraceICs) {
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542 ResourceMark rm;
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543 tty->print_cr("CompiledStaticCall@" INTPTR_FORMAT ": set_to_compiled " INTPTR_FORMAT,
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544 instruction_address(),
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545 info.entry());
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546 }
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547 // Call to compiled code
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548 assert (CodeCache::contains(info.entry()), "wrong entry point");
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549 set_destination_mt_safe(info.entry());
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550 }
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551 }
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552
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553
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554 // Compute settings for a CompiledStaticCall. Since we might have to set
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555 // the stub when calling to the interpreter, we need to return arguments.
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556 void CompiledStaticCall::compute_entry(methodHandle m, StaticCallInfo& info) {
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557 nmethod* m_code = m->code();
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558 info._callee = m;
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559 if (m_code != NULL) {
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560 info._to_interpreter = false;
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561 info._entry = m_code->verified_entry_point();
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562 } else {
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563 // Callee is interpreted code. In any case entering the interpreter
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564 // puts a converter-frame on the stack to save arguments.
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565 info._to_interpreter = true;
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566 info._entry = m()->get_c2i_entry();
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567 }
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568 }
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569
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570
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571 void CompiledStaticCall::set_stub_to_clean(static_stub_Relocation* static_stub) {
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572 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "mt unsafe call");
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573 // Reset stub
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574 address stub = static_stub->addr();
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575 assert(stub!=NULL, "stub not found");
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576 NativeMovConstReg* method_holder = nativeMovConstReg_at(stub); // creation also verifies the object
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577 NativeJump* jump = nativeJump_at(method_holder->next_instruction_address());
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578 method_holder->set_data(0);
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579 jump->set_jump_destination((address)-1);
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580 }
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581
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582
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583 address CompiledStaticCall::find_stub() {
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584 // Find reloc. information containing this call-site
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585 RelocIterator iter((nmethod*)NULL, instruction_address());
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586 while (iter.next()) {
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587 if (iter.addr() == instruction_address()) {
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588 switch(iter.type()) {
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589 case relocInfo::static_call_type:
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590 return iter.static_call_reloc()->static_stub();
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591 // We check here for opt_virtual_call_type, since we reuse the code
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592 // from the CompiledIC implementation
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593 case relocInfo::opt_virtual_call_type:
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594 return iter.opt_virtual_call_reloc()->static_stub();
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595 case relocInfo::poll_type:
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596 case relocInfo::poll_return_type: // A safepoint can't overlap a call.
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597 default:
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598 ShouldNotReachHere();
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599 }
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600 }
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601 }
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602 return NULL;
|
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603 }
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604
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605
|
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606 //-----------------------------------------------------------------------------
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607 // Non-product mode code
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608 #ifndef PRODUCT
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609
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610 void CompiledIC::verify() {
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611 // make sure code pattern is actually a call imm32 instruction
|
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612 _ic_call->verify();
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613 if (os::is_MP()) {
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614 _ic_call->verify_alignment();
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615 }
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616 assert(is_clean() || is_call_to_compiled() || is_call_to_interpreted()
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617 || is_optimized() || is_megamorphic(), "sanity check");
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618 }
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619
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620
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621 void CompiledIC::print() {
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622 print_compiled_ic();
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623 tty->cr();
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624 }
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625
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626
|
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627 void CompiledIC::print_compiled_ic() {
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628 tty->print("Inline cache at " INTPTR_FORMAT ", calling %s " INTPTR_FORMAT,
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629 instruction_address(), is_call_to_interpreted() ? "interpreted " : "", ic_destination());
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630 }
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631
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632
|
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633 void CompiledStaticCall::print() {
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634 tty->print("static call at " INTPTR_FORMAT " -> ", instruction_address());
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635 if (is_clean()) {
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636 tty->print("clean");
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637 } else if (is_call_to_compiled()) {
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638 tty->print("compiled");
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639 } else if (is_call_to_interpreted()) {
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640 tty->print("interpreted");
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641 }
|
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642 tty->cr();
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643 }
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644
|
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645 void CompiledStaticCall::verify() {
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646 // Verify call
|
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647 NativeCall::verify();
|
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648 if (os::is_MP()) {
|
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649 verify_alignment();
|
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650 }
|
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651
|
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652 // Verify stub
|
|
653 address stub = find_stub();
|
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654 assert(stub != NULL, "no stub found for static call");
|
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655 NativeMovConstReg* method_holder = nativeMovConstReg_at(stub); // creation also verifies the object
|
|
656 NativeJump* jump = nativeJump_at(method_holder->next_instruction_address());
|
|
657
|
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658 // Verify state
|
|
659 assert(is_clean() || is_call_to_compiled() || is_call_to_interpreted(), "sanity check");
|
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660 }
|
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661
|
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662 #endif
|