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annotate src/share/vm/jvmci/jvmciCompiler.cpp @ 23303:633cf7bea01d

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thread waiting for blocking JVMCI compilation should not wait on compiler queue forever (JDK-8148507) [part 2]
author Doug Simon <doug.simon@oracle.com>
date Thu, 04 Feb 2016 19:18:52 +0100
parents f41d4011035d
children bc5552dc384b
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1 /*
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2 * Copyright (c) 2011, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23
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24 #include "precompiled.hpp"
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25 #include "memory/oopFactory.hpp"
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26 #include "runtime/javaCalls.hpp"
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27 #include "jvmci/jvmciJavaClasses.hpp"
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28 #include "jvmci/jvmciCompiler.hpp"
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29 #include "jvmci/jvmciEnv.hpp"
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30 #include "jvmci/jvmciRuntime.hpp"
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31 #include "runtime/compilationPolicy.hpp"
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32 #include "runtime/globals_extension.hpp"
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33
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34 JVMCICompiler* JVMCICompiler::_instance = NULL;
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35 elapsedTimer JVMCICompiler::_codeInstallTimer;
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36
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37 JVMCICompiler::JVMCICompiler() : AbstractCompiler(jvmci) {
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38 #ifdef COMPILERJVMCI
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39 _bootstrapping = false;
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40 _methods_compiled = 0;
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41 #endif
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42 assert(_instance == NULL, "only one instance allowed");
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43 _instance = this;
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44 }
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45
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46 // Initialization
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47 void JVMCICompiler::initialize() {
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48 #ifdef COMPILERJVMCI
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49 if (!UseCompiler || !should_perform_init()) {
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50 return;
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51 }
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52
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53 set_state(initialized);
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54
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55 // JVMCI is considered as application code so we need to
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56 // stop the VM deferring compilation now.
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57 CompilationPolicy::completed_vm_startup();
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58 #endif // COMPILERJVMCI
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59 }
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60
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61 #ifdef COMPILERJVMCI
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62 void JVMCICompiler::bootstrap() {
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63 if (Arguments::mode() == Arguments::_int) {
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64 // Nothing to do in -Xint mode
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65 return;
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66 }
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67 #ifndef PRODUCT
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68 // We turn off CompileTheWorld so that compilation requests are not
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69 // ignored during bootstrap or that JVMCI can be compiled by C1/C2.
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70 FlagSetting ctwOff(CompileTheWorld, false);
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71 #endif
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72
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73 JavaThread* THREAD = JavaThread::current();
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74 _bootstrapping = true;
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75 // Allow bootstrap to perform JVMCI compilations of itself
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76 ResourceMark rm;
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77 HandleMark hm;
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78 if (PrintBootstrap) {
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79 tty->print("Bootstrapping JVMCI");
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80 }
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81 jlong start = os::javaTimeMillis();
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82
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83 Array<Method*>* objectMethods = InstanceKlass::cast(SystemDictionary::Object_klass())->methods();
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84 // Initialize compile queue with a selected set of methods.
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85 int len = objectMethods->length();
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86 for (int i = 0; i < len; i++) {
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87 methodHandle mh = objectMethods->at(i);
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88 if (!mh->is_native() && !mh->is_static() && !mh->is_initializer()) {
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89 ResourceMark rm;
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90 int hot_count = 10; // TODO: what's the appropriate value?
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91 CompileBroker::compile_method(mh, InvocationEntryBci, CompLevel_full_optimization, mh, hot_count, "bootstrap", THREAD);
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92 }
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93 }
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94
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95 int qsize;
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96 bool first_round = true;
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97 int z = 0;
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98 do {
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99 // Loop until there is something in the queue.
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100 do {
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101 os::sleep(THREAD, 100, true);
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102 qsize = CompileBroker::queue_size(CompLevel_full_optimization);
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103 } while (first_round && qsize == 0);
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104 first_round = false;
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105 if (PrintBootstrap) {
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106 while (z < (_methods_compiled / 100)) {
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107 ++z;
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108 tty->print_raw(".");
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109 }
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110 }
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111 } while (qsize != 0);
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112
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113 if (PrintBootstrap) {
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114 tty->print_cr(" in " JLONG_FORMAT " ms (compiled %d methods)", os::javaTimeMillis() - start, _methods_compiled);
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115 }
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116 _bootstrapping = false;
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117 }
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118
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119 void JVMCICompiler::compile_method(const methodHandle& method, int entry_bci, JVMCIEnv* env) {
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120 JVMCI_EXCEPTION_CONTEXT
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121
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122 bool is_osr = entry_bci != InvocationEntryBci;
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123 if (_bootstrapping && is_osr) {
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124 // no OSR compilations during bootstrap - the compiler is just too slow at this point,
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125 // and we know that there are no endless loops
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126 return;
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127 }
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128
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129 JVMCIRuntime::ensure_jvmci_class_loader_is_initialized();
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130 HandleMark hm;
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131 Handle receiver = JVMCIRuntime::get_HotSpotJVMCIRuntime(CHECK_ABORT);
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132
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133 JavaValue method_result(T_OBJECT);
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134 JavaCallArguments args;
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135 args.push_long((jlong) (address) method());
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136 JavaCalls::call_static(&method_result, SystemDictionary::HotSpotResolvedJavaMethodImpl_klass(),
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137 vmSymbols::fromMetaspace_name(), vmSymbols::method_fromMetaspace_signature(), &args, THREAD);
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138
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139 JavaValue result(T_OBJECT);
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140 if (!HAS_PENDING_EXCEPTION) {
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141 JavaCallArguments args;
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142 args.push_oop(receiver);
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143 args.push_oop((oop)method_result.get_jobject());
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144 args.push_int(entry_bci);
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145 args.push_long((jlong) (address) env);
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146 args.push_int(env->task()->compile_id());
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147 JavaCalls::call_special(&result, receiver->klass(),
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148 vmSymbols::compileMethod_name(), vmSymbols::compileMethod_signature(), &args, THREAD);
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149 }
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150
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151 // An uncaught exception was thrown during compilation. Generally these
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152 // should be handled by the Java code in some useful way but if they leak
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153 // through to here report them instead of dying or silently ignoring them.
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154 if (HAS_PENDING_EXCEPTION) {
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155 Handle throwable = PENDING_EXCEPTION;
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156 CLEAR_PENDING_EXCEPTION;
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157
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158 JVMCIRuntime::call_printStackTrace(throwable, THREAD);
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159 if (HAS_PENDING_EXCEPTION) {
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160 CLEAR_PENDING_EXCEPTION;
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161 }
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162 env->set_failure("exception throw", false);
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163 } else {
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164 oop result_object = (oop) result.get_jobject();
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165 if (result_object != NULL) {
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166 oop failure_message = CompilationRequestResult::failureMessage(result_object);
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167 if (failure_message != NULL) {
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168 const char* failure_reason = java_lang_String::as_utf8_string(failure_message);
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169 env->set_failure(failure_reason, CompilationRequestResult::retry(result_object));
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170 } else {
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171 if (env->task()->code() == NULL) {
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172 env->set_failure("no nmethod produced", true);
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173 } else {
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174 env->task()->set_num_inlined_bytecodes(CompilationRequestResult::inlinedBytecodes(result_object));
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175 Atomic::inc(&_methods_compiled);
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176 }
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177 }
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178 } else {
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179 assert(false, "JVMCICompiler.compileMethod should always return non-null");
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180 }
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181 }
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182 }
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183
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184
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185 // Compilation entry point for methods
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186 void JVMCICompiler::compile_method(ciEnv* env, ciMethod* target, int entry_bci) {
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187 ShouldNotReachHere();
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188 }
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189
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190 bool JVMCICompiler::is_trivial(Method* method) {
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191 if (_bootstrapping) {
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192 return false;
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193 }
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194 return JVMCIRuntime::treat_as_trivial(method);
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195 }
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196
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197 // Print compilation timers and statistics
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198 void JVMCICompiler::print_timers() {
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199 print_compilation_timers();
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200 }
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201
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202 #endif // COMPILERJVMCI
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203
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204 // Print compilation timers and statistics
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205 void JVMCICompiler::print_compilation_timers() {
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206 TRACE_jvmci_1("JVMCICompiler::print_timers");
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207 tty->print_cr(" JVMCI code install time: %6.3f s", _codeInstallTimer.seconds());
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208 }