1 /*
   2  * Copyright (c) 2011, 2015, 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 "oops/oop.inline.hpp"
  27 #include "runtime/javaCalls.hpp"
  28 #include "runtime/handles.hpp"
  29 #include "jvmci/jvmciJavaClasses.hpp"
  30 #include "jvmci/jvmciCompiler.hpp"
  31 #include "jvmci/jvmciEnv.hpp"
  32 #include "jvmci/jvmciRuntime.hpp"
  33 #include "runtime/compilationPolicy.hpp"
  34 #include "runtime/globals_extension.hpp"
  35 
  36 JVMCICompiler* JVMCICompiler::_instance = NULL;
  37 elapsedTimer JVMCICompiler::_codeInstallTimer;
  38 
  39 JVMCICompiler::JVMCICompiler() : AbstractCompiler(jvmci) {
  40   _bootstrapping = false;
  41   _methodsCompiled = 0;
  42   assert(_instance == NULL, "only one instance allowed");
  43   _instance = this;
  44 }
  45 
  46 // Initialization
  47 void JVMCICompiler::initialize() {
  48   if (!UseCompiler || !EnableJVMCI || !UseJVMCICompiler || !should_perform_init()) {
  49     return;
  50   }
  51 
  52   set_state(initialized);
  53 
  54   // JVMCI is considered as application code so we need to
  55   // stop the VM deferring compilation now.
  56   CompilationPolicy::completed_vm_startup();
  57 }
  58 
  59 void JVMCICompiler::bootstrap() {
  60   if (Arguments::mode() == Arguments::_int) {
  61     // Nothing to do in -Xint mode
  62     return;
  63   }
  64 #ifndef PRODUCT
  65   // We turn off CompileTheWorld so that compilation requests are not
  66   // ignored during bootstrap or that JVMCI can be compiled by C1/C2.
  67   FlagSetting ctwOff(CompileTheWorld, false);
  68 #endif
  69 
  70   JavaThread* THREAD = JavaThread::current();
  71   _bootstrapping = true;
  72   ResourceMark rm;
  73   HandleMark hm;
  74   if (PrintBootstrap) {
  75     tty->print("Bootstrapping JVMCI");
  76   }
  77   jlong start = os::javaTimeMillis();
  78 
  79   Array<Method*>* objectMethods = SystemDictionary::Object_klass()->methods();
  80   // Initialize compile queue with a selected set of methods.
  81   int len = objectMethods->length();
  82   for (int i = 0; i < len; i++) {
  83     methodHandle mh = objectMethods->at(i);
  84     if (!mh->is_native() && !mh->is_static() && !mh->is_initializer()) {
  85       ResourceMark rm;
  86       int hot_count = 10; // TODO: what's the appropriate value?
  87       CompileBroker::compile_method(mh, InvocationEntryBci, CompLevel_full_optimization, mh, hot_count, "bootstrap", THREAD);
  88     }
  89   }
  90 
  91   int qsize;
  92   bool first_round = true;
  93   int z = 0;
  94   do {
  95     // Loop until there is something in the queue.
  96     do {
  97       os::sleep(THREAD, 100, true);
  98       qsize = CompileBroker::queue_size(CompLevel_full_optimization);
  99     } while (first_round && qsize == 0);
 100     first_round = false;
 101     if (PrintBootstrap) {
 102       while (z < (_methodsCompiled / 100)) {
 103         ++z;
 104         tty->print_raw(".");
 105       }
 106     }
 107   } while (qsize != 0);
 108 
 109   if (PrintBootstrap) {
 110     tty->print_cr(" in " JLONG_FORMAT " ms (compiled %d methods)", os::javaTimeMillis() - start, _methodsCompiled);
 111   }
 112   _bootstrapping = false;
 113 }
 114 
 115 #define CHECK_ABORT THREAD); \
 116 if (HAS_PENDING_EXCEPTION) { \
 117   char buf[256]; \
 118   jio_snprintf(buf, 256, "Uncaught exception at %s:%d", __FILE__, __LINE__); \
 119   JVMCICompiler::abort_on_pending_exception(PENDING_EXCEPTION, buf); \
 120   return; \
 121 } \
 122 (void)(0
 123 
 124 void JVMCICompiler::compile_method(const methodHandle& method, int entry_bci, JVMCIEnv* env) {
 125   JVMCI_EXCEPTION_CONTEXT
 126 
 127   bool is_osr = entry_bci != InvocationEntryBci;
 128   if (_bootstrapping && is_osr) {
 129       // no OSR compilations during bootstrap - the compiler is just too slow at this point,
 130       // and we know that there are no endless loops
 131       return;
 132   }
 133 
 134   JVMCIRuntime::initialize_well_known_classes(CHECK_ABORT);
 135 
 136   HandleMark hm;
 137   ResourceMark rm;
 138   Handle receiver = JVMCIRuntime::get_HotSpotJVMCIRuntime(CHECK_ABORT);
 139 
 140   JavaValue method_result(T_OBJECT);
 141   JavaCallArguments args;
 142   args.push_long((jlong) (address) method());
 143   JavaCalls::call_static(&method_result, SystemDictionary::HotSpotResolvedJavaMethodImpl_klass(),
 144                          vmSymbols::fromMetaspace_name(), vmSymbols::method_fromMetaspace_signature(), &args, THREAD);
 145 
 146   if (!HAS_PENDING_EXCEPTION) {
 147     JavaValue result(T_VOID);
 148     JavaCallArguments args;
 149     args.push_oop(receiver);
 150     args.push_oop((oop)method_result.get_jobject());
 151     args.push_int(entry_bci);
 152     args.push_long((jlong) (address) env);
 153     args.push_int(env->task()->compile_id());
 154     JavaCalls::call_special(&result, receiver->klass(),
 155                             vmSymbols::compileMethod_name(), vmSymbols::compileMethod_signature(), &args, THREAD);
 156   }
 157 
 158   // An uncaught exception was thrown during compilation.  Generally these
 159   // should be handled by the Java code in some useful way but if they leak
 160   // through to here report them instead of dying or silently ignoring them.
 161   if (HAS_PENDING_EXCEPTION) {
 162     Handle exception(THREAD, PENDING_EXCEPTION);
 163     CLEAR_PENDING_EXCEPTION;
 164 
 165     java_lang_Throwable::java_printStackTrace(exception, THREAD);
 166 
 167     // Something went wrong so disable compilation at this level
 168     method->set_not_compilable(CompLevel_full_optimization);
 169   } else {
 170     _methodsCompiled++;
 171   }
 172 }
 173 
 174 /**
 175  * Aborts the VM due to an unexpected exception.
 176  */
 177 void JVMCICompiler::abort_on_pending_exception(Handle exception, const char* message, bool dump_core) {
 178   Thread* THREAD = Thread::current();
 179   CLEAR_PENDING_EXCEPTION;
 180 
 181   java_lang_Throwable::java_printStackTrace(exception, THREAD);
 182 
 183   // Give other aborting threads to also print their stack traces.
 184   // This can be very useful when debugging class initialization
 185   // failures.
 186   assert(THREAD->is_Java_thread(), "compiler threads should be Java threads");
 187   const bool interruptible = true;
 188   os::sleep(THREAD, 200, interruptible);
 189 
 190   vm_abort(dump_core);
 191 }
 192 
 193 // Compilation entry point for methods
 194 void JVMCICompiler::compile_method(ciEnv* env, ciMethod* target, int entry_bci, DirectiveSet* directive) {
 195   ShouldNotReachHere();
 196 }
 197 
 198 bool JVMCICompiler::is_trivial(Method* method) {
 199   if (_bootstrapping) {
 200     return false;
 201   }
 202   return JVMCIRuntime::treat_as_trivial(method);
 203 }
 204 
 205 // Print compilation timers and statistics
 206 void JVMCICompiler::print_timers() {
 207   print_compilation_timers();
 208 }
 209 
 210 // Print compilation timers and statistics
 211 void JVMCICompiler::print_compilation_timers() {
 212   TRACE_jvmci_1("JVMCICompiler::print_timers");
 213   tty->print_cr("       JVMCI code install time:        %6.3f s",    _codeInstallTimer.seconds());
 214 }