1 /* 2 * Copyright (c) 1999, 2014, Oracle and/or its affiliates. All rights reserved. 3 * Copyright 2008, 2009, 2010, 2011 Red Hat, Inc. 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 5 * 6 * This code is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License version 2 only, as 8 * published by the Free Software Foundation. 9 * 10 * This code is distributed in the hope that it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 * version 2 for more details (a copy is included in the LICENSE file that 14 * accompanied this code). 15 * 16 * You should have received a copy of the GNU General Public License version 17 * 2 along with this work; if not, write to the Free Software Foundation, 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 * 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 * or visit www.oracle.com if you need additional information or have any 22 * questions. 23 * 24 */ 25 26 #include "precompiled.hpp" 27 #include "ci/ciEnv.hpp" 28 #include "ci/ciMethod.hpp" 29 #include "code/debugInfoRec.hpp" 30 #include "code/dependencies.hpp" 31 #include "code/exceptionHandlerTable.hpp" 32 #include "code/oopRecorder.hpp" 33 #include "compiler/abstractCompiler.hpp" 34 #include "compiler/oopMap.hpp" 35 #include "shark/llvmHeaders.hpp" 36 #include "shark/sharkBuilder.hpp" 37 #include "shark/sharkCodeBuffer.hpp" 38 #include "shark/sharkCompiler.hpp" 39 #include "shark/sharkContext.hpp" 40 #include "shark/sharkEntry.hpp" 41 #include "shark/sharkFunction.hpp" 42 #include "shark/sharkMemoryManager.hpp" 43 #include "shark/sharkNativeWrapper.hpp" 44 #include "shark/shark_globals.hpp" 45 #include "utilities/debug.hpp" 46 47 #include <fnmatch.h> 48 49 using namespace llvm; 50 51 namespace { 52 cl::opt<std::string> 53 MCPU("mcpu"); 54 55 cl::list<std::string> 56 MAttrs("mattr", 57 cl::CommaSeparated); 58 } 59 60 SharkCompiler::SharkCompiler() 61 : AbstractCompiler(shark) { 62 // Create the lock to protect the memory manager and execution engine 63 _execution_engine_lock = new Monitor(Mutex::leaf, "SharkExecutionEngineLock"); 64 MutexLocker locker(execution_engine_lock()); 65 66 // Make LLVM safe for multithreading 67 if (!llvm_start_multithreaded()) 68 fatal("llvm_start_multithreaded() failed"); 69 70 // Initialize the native target 71 InitializeNativeTarget(); 72 73 // MCJIT require a native AsmPrinter 74 InitializeNativeTargetAsmPrinter(); 75 76 // Create the two contexts which we'll use 77 _normal_context = new SharkContext("normal"); 78 _native_context = new SharkContext("native"); 79 80 // Create the memory manager 81 _memory_manager = new SharkMemoryManager(); 82 83 // Finetune LLVM for the current host CPU. 84 StringMap<bool> Features; 85 bool gotCpuFeatures = llvm::sys::getHostCPUFeatures(Features); 86 std::string cpu("-mcpu=" + llvm::sys::getHostCPUName()); 87 88 std::vector<const char*> args; 89 args.push_back(""); // program name 90 args.push_back(cpu.c_str()); 91 92 std::string mattr("-mattr="); 93 if(gotCpuFeatures){ 94 for(StringMap<bool>::iterator I = Features.begin(), 95 E = Features.end(); I != E; ++I){ 96 if(I->second){ 97 std::string attr(I->first()); 98 mattr+="+"+attr+","; 99 } 100 } 101 args.push_back(mattr.c_str()); 102 } 103 104 args.push_back(0); // terminator 105 cl::ParseCommandLineOptions(args.size() - 1, (char **) &args[0]); 106 107 // Create the JIT 108 std::string ErrorMsg; 109 110 EngineBuilder builder(_normal_context->module()); 111 builder.setMCPU(MCPU); 112 builder.setMAttrs(MAttrs); 113 builder.setJITMemoryManager(memory_manager()); 114 builder.setEngineKind(EngineKind::JIT); 115 builder.setErrorStr(&ErrorMsg); 116 if (! fnmatch(SharkOptimizationLevel, "None", 0)) { 117 tty->print_cr("Shark optimization level set to: None"); 118 builder.setOptLevel(llvm::CodeGenOpt::None); 119 } else if (! fnmatch(SharkOptimizationLevel, "Less", 0)) { 120 tty->print_cr("Shark optimization level set to: Less"); 121 builder.setOptLevel(llvm::CodeGenOpt::Less); 122 } else if (! fnmatch(SharkOptimizationLevel, "Aggressive", 0)) { 123 tty->print_cr("Shark optimization level set to: Aggressive"); 124 builder.setOptLevel(llvm::CodeGenOpt::Aggressive); 125 } // else Default is selected by, well, default :-) 126 _execution_engine = builder.create(); 127 128 if (!execution_engine()) { 129 if (!ErrorMsg.empty()) 130 printf("Error while creating Shark JIT: %s\n",ErrorMsg.c_str()); 131 else 132 printf("Unknown error while creating Shark JIT\n"); 133 exit(1); 134 } 135 136 execution_engine()->addModule(_native_context->module()); 137 138 // All done 139 set_state(initialized); 140 } 141 142 void SharkCompiler::initialize() { 143 ShouldNotCallThis(); 144 } 145 146 void SharkCompiler::compile_method(ciEnv* env, 147 ciMethod* target, 148 int entry_bci) { 149 assert(is_initialized(), "should be"); 150 ResourceMark rm; 151 const char *name = methodname( 152 target->holder()->name()->as_utf8(), target->name()->as_utf8()); 153 154 // Do the typeflow analysis 155 ciTypeFlow *flow; 156 if (entry_bci == InvocationEntryBci) 157 flow = target->get_flow_analysis(); 158 else 159 flow = target->get_osr_flow_analysis(entry_bci); 160 if (flow->failing()) 161 return; 162 if (SharkPrintTypeflowOf != NULL) { 163 if (!fnmatch(SharkPrintTypeflowOf, name, 0)) 164 flow->print_on(tty); 165 } 166 167 // Create the recorders 168 Arena arena; 169 env->set_oop_recorder(new OopRecorder(&arena)); 170 OopMapSet oopmaps; 171 env->set_debug_info(new DebugInformationRecorder(env->oop_recorder())); 172 env->debug_info()->set_oopmaps(&oopmaps); 173 env->set_dependencies(new Dependencies(env)); 174 175 // Create the code buffer and builder 176 CodeBuffer hscb("Shark", 256 * K, 64 * K); 177 hscb.initialize_oop_recorder(env->oop_recorder()); 178 MacroAssembler *masm = new MacroAssembler(&hscb); 179 SharkCodeBuffer cb(masm); 180 SharkBuilder builder(&cb); 181 182 // Emit the entry point 183 SharkEntry *entry = (SharkEntry *) cb.malloc(sizeof(SharkEntry)); 184 185 // Build the LLVM IR for the method 186 Function *function = SharkFunction::build(env, &builder, flow, name); 187 if (env->failing()) { 188 return; 189 } 190 191 // Generate native code. It's unpleasant that we have to drop into 192 // the VM to do this -- it blocks safepoints -- but I can't see any 193 // other way to handle the locking. 194 { 195 ThreadInVMfromNative tiv(JavaThread::current()); 196 generate_native_code(entry, function, name); 197 } 198 199 // Install the method into the VM 200 CodeOffsets offsets; 201 offsets.set_value(CodeOffsets::Deopt, 0); 202 offsets.set_value(CodeOffsets::Exceptions, 0); 203 offsets.set_value(CodeOffsets::Verified_Entry, 204 target->is_static() ? 0 : wordSize); 205 206 ExceptionHandlerTable handler_table; 207 ImplicitExceptionTable inc_table; 208 209 env->register_method(target, 210 entry_bci, 211 &offsets, 212 0, 213 &hscb, 214 0, 215 &oopmaps, 216 &handler_table, 217 &inc_table, 218 this, 219 env->comp_level(), 220 false, 221 false); 222 } 223 224 nmethod* SharkCompiler::generate_native_wrapper(MacroAssembler* masm, 225 methodHandle target, 226 int compile_id, 227 BasicType* arg_types, 228 BasicType return_type) { 229 assert(is_initialized(), "should be"); 230 ResourceMark rm; 231 const char *name = methodname( 232 target->klass_name()->as_utf8(), target->name()->as_utf8()); 233 234 // Create the code buffer and builder 235 SharkCodeBuffer cb(masm); 236 SharkBuilder builder(&cb); 237 238 // Emit the entry point 239 SharkEntry *entry = (SharkEntry *) cb.malloc(sizeof(SharkEntry)); 240 241 // Build the LLVM IR for the method 242 SharkNativeWrapper *wrapper = SharkNativeWrapper::build( 243 &builder, target, name, arg_types, return_type); 244 245 // Generate native code 246 generate_native_code(entry, wrapper->function(), name); 247 248 // Return the nmethod for installation in the VM 249 return nmethod::new_native_nmethod(target, 250 compile_id, 251 masm->code(), 252 0, 253 0, 254 wrapper->frame_size(), 255 wrapper->receiver_offset(), 256 wrapper->lock_offset(), 257 wrapper->oop_maps()); 258 } 259 260 void SharkCompiler::generate_native_code(SharkEntry* entry, 261 Function* function, 262 const char* name) { 263 // Print the LLVM bitcode, if requested 264 if (SharkPrintBitcodeOf != NULL) { 265 if (!fnmatch(SharkPrintBitcodeOf, name, 0)) 266 function->dump(); 267 } 268 269 if (SharkVerifyFunction != NULL) { 270 if (!fnmatch(SharkVerifyFunction, name, 0)) { 271 verifyFunction(*function); 272 } 273 } 274 275 // Compile to native code 276 address code = NULL; 277 context()->add_function(function); 278 { 279 MutexLocker locker(execution_engine_lock()); 280 free_queued_methods(); 281 282 #ifndef NDEBUG 283 #if SHARK_LLVM_VERSION <= 31 284 #define setCurrentDebugType SetCurrentDebugType 285 #endif 286 if (SharkPrintAsmOf != NULL) { 287 if (!fnmatch(SharkPrintAsmOf, name, 0)) { 288 llvm::setCurrentDebugType(X86_ONLY("x86-emitter") NOT_X86("jit")); 289 llvm::DebugFlag = true; 290 } 291 else { 292 llvm::setCurrentDebugType(""); 293 llvm::DebugFlag = false; 294 } 295 } 296 #ifdef setCurrentDebugType 297 #undef setCurrentDebugType 298 #endif 299 #endif // !NDEBUG 300 memory_manager()->set_entry_for_function(function, entry); 301 code = (address) execution_engine()->getPointerToFunction(function); 302 } 303 assert(code != NULL, "code must be != NULL"); 304 entry->set_entry_point(code); 305 entry->set_function(function); 306 entry->set_context(context()); 307 address code_start = entry->code_start(); 308 address code_limit = entry->code_limit(); 309 310 // Register generated code for profiling, etc 311 if (JvmtiExport::should_post_dynamic_code_generated()) 312 JvmtiExport::post_dynamic_code_generated(name, code_start, code_limit); 313 314 // Print debug information, if requested 315 if (SharkTraceInstalls) { 316 tty->print_cr( 317 " [%p-%p): %s (%d bytes code)", 318 code_start, code_limit, name, code_limit - code_start); 319 } 320 } 321 322 void SharkCompiler::free_compiled_method(address code) { 323 // This method may only be called when the VM is at a safepoint. 324 // All _thread_in_vm threads will be waiting for the safepoint to 325 // finish with the exception of the VM thread, so we can consider 326 // ourself the owner of the execution engine lock even though we 327 // can't actually acquire it at this time. 328 assert(Thread::current()->is_Compiler_thread(), "must be called by compiler thread"); 329 assert_locked_or_safepoint(CodeCache_lock); 330 331 SharkEntry *entry = (SharkEntry *) code; 332 entry->context()->push_to_free_queue(entry->function()); 333 } 334 335 void SharkCompiler::free_queued_methods() { 336 // The free queue is protected by the execution engine lock 337 assert(execution_engine_lock()->owned_by_self(), "should be"); 338 339 while (true) { 340 Function *function = context()->pop_from_free_queue(); 341 if (function == NULL) 342 break; 343 344 execution_engine()->freeMachineCodeForFunction(function); 345 function->eraseFromParent(); 346 } 347 } 348 349 const char* SharkCompiler::methodname(const char* klass, const char* method) { 350 char *buf = NEW_RESOURCE_ARRAY(char, strlen(klass) + 2 + strlen(method) + 1); 351 352 char *dst = buf; 353 for (const char *c = klass; *c; c++) { 354 if (*c == '/') 355 *(dst++) = '.'; 356 else 357 *(dst++) = *c; 358 } 359 *(dst++) = ':'; 360 *(dst++) = ':'; 361 for (const char *c = method; *c; c++) { 362 *(dst++) = *c; 363 } 364 *(dst++) = '\0'; 365 return buf; 366 } 367 368 void SharkCompiler::print_timers() { 369 // do nothing 370 }