1 /*
   2  * Copyright (c) 2011, 2016, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 #include "precompiled.hpp"
  25 #include "memory/oopFactory.hpp"
  26 #include "memory/resourceArea.hpp"
  27 #include "oops/oop.inline.hpp"
  28 #include "runtime/javaCalls.hpp"
  29 #include "runtime/handles.hpp"
  30 #include "jvmci/jvmciJavaClasses.hpp"
  31 #include "jvmci/jvmciCompiler.hpp"
  32 #include "jvmci/jvmciEnv.hpp"
  33 #include "jvmci/jvmciRuntime.hpp"
  34 #include "runtime/compilationPolicy.hpp"
  35 #include "runtime/globals_extension.hpp"
  36 
  37 JVMCICompiler* JVMCICompiler::_instance = NULL;
  38 elapsedTimer JVMCICompiler::_codeInstallTimer;
  39 
  40 JVMCICompiler::JVMCICompiler() : AbstractCompiler(jvmci) {
  41   _bootstrapping = false;
  42   _bootstrap_compilation_request_seen = false;
  43   _methods_compiled = 0;
  44   assert(_instance == NULL, "only one instance allowed");
  45   _instance = this;
  46 }
  47 
  48 // Initialization
  49 void JVMCICompiler::initialize() {
  50   if (!UseCompiler || !EnableJVMCI || !UseJVMCICompiler || !should_perform_init()) {
  51     return;
  52   }
  53 
  54   set_state(initialized);
  55 
  56   // JVMCI is considered as application code so we need to
  57   // stop the VM deferring compilation now.
  58   CompilationPolicy::completed_vm_startup();
  59 }
  60 
  61 void JVMCICompiler::bootstrap() {
  62   if (Arguments::mode() == Arguments::_int) {
  63     // Nothing to do in -Xint mode
  64     return;
  65   }
  66 #ifndef PRODUCT
  67   // We turn off CompileTheWorld so that compilation requests are not
  68   // ignored during bootstrap or that JVMCI can be compiled by C1/C2.
  69   FlagSetting ctwOff(CompileTheWorld, false);
  70 #endif
  71 
  72   JavaThread* THREAD = JavaThread::current();
  73   _bootstrapping = true;
  74   ResourceMark rm;
  75   HandleMark hm;
  76   if (PrintBootstrap) {
  77     tty->print("Bootstrapping JVMCI");
  78   }
  79   jlong start = os::javaTimeMillis();
  80 
  81   Array<Method*>* objectMethods = SystemDictionary::Object_klass()->methods();
  82   // Initialize compile queue with a selected set of methods.
  83   int len = objectMethods->length();
  84   for (int i = 0; i < len; i++) {
  85     methodHandle mh = objectMethods->at(i);
  86     if (!mh->is_native() && !mh->is_static() && !mh->is_initializer()) {
  87       ResourceMark rm;
  88       int hot_count = 10; // TODO: what's the appropriate value?
  89       CompileBroker::compile_method(mh, InvocationEntryBci, CompLevel_full_optimization, mh, hot_count, CompileTask::Reason_Bootstrap, THREAD);
  90     }
  91   }
  92 
  93   int qsize;
  94   bool first_round = true;
  95   int z = 0;
  96   do {
  97     // Loop until there is something in the queue.
  98     do {
  99       os::sleep(THREAD, 100, true);
 100       qsize = CompileBroker::queue_size(CompLevel_full_optimization);
 101     } while (!_bootstrap_compilation_request_seen && first_round && qsize == 0);
 102     first_round = false;
 103     if (PrintBootstrap) {
 104       while (z < (_methods_compiled / 100)) {
 105         ++z;
 106         tty->print_raw(".");
 107       }
 108     }
 109   } while (qsize != 0);
 110 
 111   if (PrintBootstrap) {
 112     tty->print_cr(" in " JLONG_FORMAT " ms (compiled %d methods)", os::javaTimeMillis() - start, _methods_compiled);
 113   }
 114   _bootstrapping = false;
 115   JVMCIRuntime::bootstrap_finished(THREAD);
 116 }
 117 
 118 #define CHECK_ABORT THREAD); \
 119 if (HAS_PENDING_EXCEPTION) { \
 120   char buf[256]; \
 121   jio_snprintf(buf, 256, "Uncaught exception at %s:%d", __FILE__, __LINE__); \
 122   JVMCICompiler::abort_on_pending_exception(PENDING_EXCEPTION, buf); \
 123   return; \
 124 } \
 125 (void)(0
 126 
 127 void JVMCICompiler::compile_method(const methodHandle& method, int entry_bci, JVMCIEnv* env) {
 128   JVMCI_EXCEPTION_CONTEXT
 129 
 130   bool is_osr = entry_bci != InvocationEntryBci;
 131   if (_bootstrapping && is_osr) {
 132       // no OSR compilations during bootstrap - the compiler is just too slow at this point,
 133       // and we know that there are no endless loops
 134       return;
 135   }
 136 
 137   JVMCIRuntime::initialize_well_known_classes(CHECK_ABORT);
 138 
 139   HandleMark hm;
 140   Handle receiver = JVMCIRuntime::get_HotSpotJVMCIRuntime(CHECK_ABORT);
 141 
 142   JavaValue method_result(T_OBJECT);
 143   JavaCallArguments args;
 144   args.push_long((jlong) (address) method());
 145   JavaCalls::call_static(&method_result, SystemDictionary::HotSpotResolvedJavaMethodImpl_klass(),
 146                          vmSymbols::fromMetaspace_name(), vmSymbols::method_fromMetaspace_signature(), &args, THREAD);
 147 
 148   JavaValue result(T_OBJECT);
 149   if (!HAS_PENDING_EXCEPTION) {
 150     JavaCallArguments args;
 151     args.push_oop(receiver);
 152     args.push_oop((oop)method_result.get_jobject());
 153     args.push_int(entry_bci);
 154     args.push_long((jlong) (address) env);
 155     args.push_int(env->task()->compile_id());
 156     JavaCalls::call_special(&result, receiver->klass(),
 157                             vmSymbols::compileMethod_name(), vmSymbols::compileMethod_signature(), &args, THREAD);
 158   }
 159 
 160   // An uncaught exception was thrown during compilation.  Generally these
 161   // should be handled by the Java code in some useful way but if they leak
 162   // through to here report them instead of dying or silently ignoring them.
 163   if (HAS_PENDING_EXCEPTION) {
 164     Handle exception(THREAD, PENDING_EXCEPTION);
 165     CLEAR_PENDING_EXCEPTION;
 166 
 167     java_lang_Throwable::java_printStackTrace(exception, THREAD);
 168     if (HAS_PENDING_EXCEPTION) {
 169       CLEAR_PENDING_EXCEPTION;
 170     }
 171 
 172     env->set_failure("exception throw", false);
 173   } else {
 174     oop result_object = (oop) result.get_jobject();
 175     if (result_object != NULL) {
 176       oop failure_message = CompilationRequestResult::failureMessage(result_object);
 177       if (failure_message != NULL) {
 178         const char* failure_reason = java_lang_String::as_utf8_string(failure_message);
 179         env->set_failure(failure_reason, CompilationRequestResult::retry(result_object) != 0);
 180       } else {
 181         if (env->task()->code() == NULL) {
 182           env->set_failure("no nmethod produced", true);
 183         } else {
 184           env->task()->set_num_inlined_bytecodes(CompilationRequestResult::inlinedBytecodes(result_object));
 185           Atomic::inc(&_methods_compiled);
 186         }
 187       }
 188     } else {
 189       assert(false, "JVMCICompiler.compileMethod should always return non-null");
 190     }
 191   }
 192   if (_bootstrapping) {
 193     _bootstrap_compilation_request_seen = true;
 194   }
 195 }
 196 
 197 /**
 198  * Aborts the VM due to an unexpected exception.
 199  */
 200 void JVMCICompiler::abort_on_pending_exception(Handle exception, const char* message, bool dump_core) {
 201   Thread* THREAD = Thread::current();
 202   CLEAR_PENDING_EXCEPTION;
 203 
 204   java_lang_Throwable::java_printStackTrace(exception, THREAD);
 205 
 206   // Give other aborting threads to also print their stack traces.
 207   // This can be very useful when debugging class initialization
 208   // failures.
 209   assert(THREAD->is_Java_thread(), "compiler threads should be Java threads");
 210   const bool interruptible = true;
 211   os::sleep(THREAD, 200, interruptible);
 212 
 213   vm_abort(dump_core);
 214 }
 215 
 216 // Compilation entry point for methods
 217 void JVMCICompiler::compile_method(ciEnv* env, ciMethod* target, int entry_bci, DirectiveSet* directive) {
 218   ShouldNotReachHere();
 219 }
 220 
 221 bool JVMCICompiler::is_trivial(Method* method) {
 222   if (_bootstrapping) {
 223     return false;
 224   }
 225   return JVMCIRuntime::treat_as_trivial(method);
 226 }
 227 
 228 // Print compilation timers and statistics
 229 void JVMCICompiler::print_timers() {
 230   print_compilation_timers();
 231 }
 232 
 233 // Print compilation timers and statistics
 234 void JVMCICompiler::print_compilation_timers() {
 235   TRACE_jvmci_1("JVMCICompiler::print_timers");
 236   tty->print_cr("       JVMCI code install time:        %6.3f s",    _codeInstallTimer.seconds());
 237 }