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1692
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1 /*
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1972
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2 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
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3 * Copyright 2008, 2009, 2010, 2011 Red Hat, Inc.
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1692
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4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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5 *
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6 * This code is free software; you can redistribute it and/or modify it
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7 * under the terms of the GNU General Public License version 2 only, as
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8 * published by the Free Software Foundation.
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9 *
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10 * This code is distributed in the hope that it will be useful, but WITHOUT
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11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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13 * version 2 for more details (a copy is included in the LICENSE file that
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14 * accompanied this code).
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15 *
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16 * You should have received a copy of the GNU General Public License version
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17 * 2 along with this work; if not, write to the Free Software Foundation,
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18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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19 *
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20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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21 * or visit www.oracle.com if you need additional information or have any
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22 * questions.
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23 *
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24 */
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25
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1972
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26 #include "precompiled.hpp"
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27 #include "ci/ciEnv.hpp"
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28 #include "ci/ciMethod.hpp"
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29 #include "code/debugInfoRec.hpp"
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30 #include "code/dependencies.hpp"
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31 #include "code/exceptionHandlerTable.hpp"
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32 #include "code/oopRecorder.hpp"
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33 #include "compiler/abstractCompiler.hpp"
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34 #include "compiler/oopMap.hpp"
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35 #include "shark/llvmHeaders.hpp"
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36 #include "shark/sharkBuilder.hpp"
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37 #include "shark/sharkCodeBuffer.hpp"
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38 #include "shark/sharkCompiler.hpp"
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39 #include "shark/sharkContext.hpp"
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40 #include "shark/sharkEntry.hpp"
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41 #include "shark/sharkFunction.hpp"
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42 #include "shark/sharkMemoryManager.hpp"
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43 #include "shark/sharkNativeWrapper.hpp"
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44 #include "shark/shark_globals.hpp"
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45 #include "utilities/debug.hpp"
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1692
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46
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47 #include <fnmatch.h>
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48
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49 using namespace llvm;
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50
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51 #if SHARK_LLVM_VERSION >= 27
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52 namespace {
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53 cl::opt<std::string>
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54 MCPU("mcpu");
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55
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56 cl::list<std::string>
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57 MAttrs("mattr",
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58 cl::CommaSeparated);
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59 }
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60 #endif
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61
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62 SharkCompiler::SharkCompiler()
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63 : AbstractCompiler() {
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64 // Create the lock to protect the memory manager and execution engine
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65 _execution_engine_lock = new Monitor(Mutex::leaf, "SharkExecutionEngineLock");
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66 MutexLocker locker(execution_engine_lock());
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67
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68 // Make LLVM safe for multithreading
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69 if (!llvm_start_multithreaded())
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70 fatal("llvm_start_multithreaded() failed");
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71
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72 // Initialize the native target
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73 InitializeNativeTarget();
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74
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75 // Create the two contexts which we'll use
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76 _normal_context = new SharkContext("normal");
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77 _native_context = new SharkContext("native");
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78
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79 // Create the memory manager
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80 _memory_manager = new SharkMemoryManager();
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81
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82 #if SHARK_LLVM_VERSION >= 27
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83 // Finetune LLVM for the current host CPU.
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84 StringMap<bool> Features;
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85 bool gotCpuFeatures = llvm::sys::getHostCPUFeatures(Features);
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86 std::string cpu("-mcpu=" + llvm::sys::getHostCPUName());
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87
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88 std::vector<const char*> args;
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89 args.push_back(""); // program name
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90 args.push_back(cpu.c_str());
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91
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92 std::string mattr("-mattr=");
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93 if(gotCpuFeatures){
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94 for(StringMap<bool>::iterator I = Features.begin(),
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95 E = Features.end(); I != E; ++I){
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96 if(I->second){
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97 std::string attr(I->first());
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98 mattr+="+"+attr+",";
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99 }
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100 }
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101 args.push_back(mattr.c_str());
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102 }
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103
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104 args.push_back(0); // terminator
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105 cl::ParseCommandLineOptions(args.size() - 1, (char **) &args[0]);
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106
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107 // Create the JIT
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108 std::string ErrorMsg;
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109
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110 EngineBuilder builder(_normal_context->module());
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111 builder.setMCPU(MCPU);
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112 builder.setMAttrs(MAttrs);
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113 builder.setJITMemoryManager(memory_manager());
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114 builder.setEngineKind(EngineKind::JIT);
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115 builder.setErrorStr(&ErrorMsg);
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116 _execution_engine = builder.create();
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117
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118 if (!execution_engine()) {
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119 if (!ErrorMsg.empty())
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120 printf("Error while creating Shark JIT: %s\n",ErrorMsg.c_str());
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121 else
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122 printf("Unknown error while creating Shark JIT\n");
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123 exit(1);
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124 }
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125
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126 execution_engine()->addModule(
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127 _native_context->module());
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128 #else
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129 _execution_engine = ExecutionEngine::createJIT(
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130 _normal_context->module_provider(),
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131 NULL, memory_manager(), CodeGenOpt::Default);
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132 execution_engine()->addModuleProvider(
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133 _native_context->module_provider());
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134 #endif
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135
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136 // All done
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137 mark_initialized();
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138 }
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139
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140 void SharkCompiler::initialize() {
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141 ShouldNotCallThis();
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142 }
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143
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144 void SharkCompiler::compile_method(ciEnv* env,
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145 ciMethod* target,
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146 int entry_bci) {
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147 assert(is_initialized(), "should be");
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148 ResourceMark rm;
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149 const char *name = methodname(
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150 target->holder()->name()->as_utf8(), target->name()->as_utf8());
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151
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152 // Do the typeflow analysis
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153 ciTypeFlow *flow;
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154 if (entry_bci == InvocationEntryBci)
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155 flow = target->get_flow_analysis();
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156 else
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157 flow = target->get_osr_flow_analysis(entry_bci);
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158 if (flow->failing())
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159 return;
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160 if (SharkPrintTypeflowOf != NULL) {
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161 if (!fnmatch(SharkPrintTypeflowOf, name, 0))
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162 flow->print_on(tty);
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163 }
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164
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165 // Create the recorders
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166 Arena arena;
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167 env->set_oop_recorder(new OopRecorder(&arena));
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168 OopMapSet oopmaps;
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169 env->set_debug_info(new DebugInformationRecorder(env->oop_recorder()));
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170 env->debug_info()->set_oopmaps(&oopmaps);
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171 env->set_dependencies(new Dependencies(env));
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172
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173 // Create the code buffer and builder
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174 CodeBuffer hscb("Shark", 256 * K, 64 * K);
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175 hscb.initialize_oop_recorder(env->oop_recorder());
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176 MacroAssembler *masm = new MacroAssembler(&hscb);
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177 SharkCodeBuffer cb(masm);
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178 SharkBuilder builder(&cb);
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179
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180 // Emit the entry point
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181 SharkEntry *entry = (SharkEntry *) cb.malloc(sizeof(SharkEntry));
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182
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183 // Build the LLVM IR for the method
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184 Function *function = SharkFunction::build(env, &builder, flow, name);
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185
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186 // Generate native code. It's unpleasant that we have to drop into
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187 // the VM to do this -- it blocks safepoints -- but I can't see any
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188 // other way to handle the locking.
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189 {
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190 ThreadInVMfromNative tiv(JavaThread::current());
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191 generate_native_code(entry, function, name);
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192 }
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193
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194 // Install the method into the VM
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195 CodeOffsets offsets;
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196 offsets.set_value(CodeOffsets::Deopt, 0);
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197 offsets.set_value(CodeOffsets::Exceptions, 0);
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198 offsets.set_value(CodeOffsets::Verified_Entry,
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199 target->is_static() ? 0 : wordSize);
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200
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201 ExceptionHandlerTable handler_table;
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202 ImplicitExceptionTable inc_table;
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203
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204 env->register_method(target,
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205 entry_bci,
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206 &offsets,
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207 0,
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208 &hscb,
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209 0,
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210 &oopmaps,
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211 &handler_table,
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212 &inc_table,
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213 this,
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214 env->comp_level(),
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215 false,
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216 false);
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217 }
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218
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219 nmethod* SharkCompiler::generate_native_wrapper(MacroAssembler* masm,
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220 methodHandle target,
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221 int compile_id,
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222 BasicType* arg_types,
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223 BasicType return_type) {
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224 assert(is_initialized(), "should be");
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225 ResourceMark rm;
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226 const char *name = methodname(
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227 target->klass_name()->as_utf8(), target->name()->as_utf8());
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228
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229 // Create the code buffer and builder
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230 SharkCodeBuffer cb(masm);
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231 SharkBuilder builder(&cb);
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232
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233 // Emit the entry point
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234 SharkEntry *entry = (SharkEntry *) cb.malloc(sizeof(SharkEntry));
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235
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236 // Build the LLVM IR for the method
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237 SharkNativeWrapper *wrapper = SharkNativeWrapper::build(
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238 &builder, target, name, arg_types, return_type);
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239
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240 // Generate native code
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241 generate_native_code(entry, wrapper->function(), name);
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242
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243 // Return the nmethod for installation in the VM
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244 return nmethod::new_native_nmethod(target,
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245 compile_id,
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246 masm->code(),
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247 0,
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248 0,
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249 wrapper->frame_size(),
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250 wrapper->receiver_offset(),
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251 wrapper->lock_offset(),
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252 wrapper->oop_maps());
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253 }
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254
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255 void SharkCompiler::generate_native_code(SharkEntry* entry,
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256 Function* function,
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257 const char* name) {
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258 // Print the LLVM bitcode, if requested
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259 if (SharkPrintBitcodeOf != NULL) {
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260 if (!fnmatch(SharkPrintBitcodeOf, name, 0))
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261 function->dump();
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262 }
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263
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264 // Compile to native code
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265 address code = NULL;
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266 context()->add_function(function);
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267 {
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268 MutexLocker locker(execution_engine_lock());
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269 free_queued_methods();
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270
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271 if (SharkPrintAsmOf != NULL) {
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272 #if SHARK_LLVM_VERSION >= 27
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273 #ifndef NDEBUG
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274 if (!fnmatch(SharkPrintAsmOf, name, 0)) {
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275 llvm::SetCurrentDebugType(X86_ONLY("x86-emitter") NOT_X86("jit"));
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276 llvm::DebugFlag = true;
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277 }
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278 else {
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279 llvm::SetCurrentDebugType("");
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280 llvm::DebugFlag = false;
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281 }
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282 #endif // !NDEBUG
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283 #else
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284 // NB you need to patch LLVM with http://tinyurl.com/yf3baln for this
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285 std::vector<const char*> args;
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286 args.push_back(""); // program name
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287 if (!fnmatch(SharkPrintAsmOf, name, 0))
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288 args.push_back("-debug-only=x86-emitter");
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289 else
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290 args.push_back("-debug-only=none");
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291 args.push_back(0); // terminator
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292 cl::ParseCommandLineOptions(args.size() - 1, (char **) &args[0]);
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293 #endif // SHARK_LLVM_VERSION
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294 }
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295 memory_manager()->set_entry_for_function(function, entry);
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296 code = (address) execution_engine()->getPointerToFunction(function);
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297 }
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298 entry->set_entry_point(code);
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299 entry->set_function(function);
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300 entry->set_context(context());
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301 address code_start = entry->code_start();
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302 address code_limit = entry->code_limit();
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303
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304 // Register generated code for profiling, etc
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305 if (JvmtiExport::should_post_dynamic_code_generated())
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306 JvmtiExport::post_dynamic_code_generated(name, code_start, code_limit);
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307
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308 // Print debug information, if requested
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309 if (SharkTraceInstalls) {
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310 tty->print_cr(
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311 " [%p-%p): %s (%d bytes code)",
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312 code_start, code_limit, name, code_limit - code_start);
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313 }
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314 }
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315
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316 void SharkCompiler::free_compiled_method(address code) {
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317 // This method may only be called when the VM is at a safepoint.
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318 // All _thread_in_vm threads will be waiting for the safepoint to
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319 // finish with the exception of the VM thread, so we can consider
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320 // ourself the owner of the execution engine lock even though we
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321 // can't actually acquire it at this time.
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322 assert(Thread::current()->is_VM_thread(), "must be called by VM thread");
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323 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
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324
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325 SharkEntry *entry = (SharkEntry *) code;
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326 entry->context()->push_to_free_queue(entry->function());
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327 }
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328
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329 void SharkCompiler::free_queued_methods() {
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330 // The free queue is protected by the execution engine lock
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331 assert(execution_engine_lock()->owned_by_self(), "should be");
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332
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333 while (true) {
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334 Function *function = context()->pop_from_free_queue();
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335 if (function == NULL)
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336 break;
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337
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338 execution_engine()->freeMachineCodeForFunction(function);
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339 function->eraseFromParent();
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340 }
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341 }
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342
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343 const char* SharkCompiler::methodname(const char* klass, const char* method) {
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344 char *buf = NEW_RESOURCE_ARRAY(char, strlen(klass) + 2 + strlen(method) + 1);
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345
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346 char *dst = buf;
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347 for (const char *c = klass; *c; c++) {
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348 if (*c == '/')
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349 *(dst++) = '.';
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350 else
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351 *(dst++) = *c;
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352 }
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353 *(dst++) = ':';
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354 *(dst++) = ':';
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355 for (const char *c = method; *c; c++) {
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356 *(dst++) = *c;
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357 }
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358 *(dst++) = '\0';
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359 return buf;
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360 }
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