/*

 * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

#include "precompiled.hpp"

#include "memory/oopFactory.hpp"

#include "oops/oop.inline.hpp"

#include "runtime/javaCalls.hpp"

#include "runtime/handles.hpp"

#include "jvmci/jvmciJavaClasses.hpp"

#include "jvmci/jvmciCompiler.hpp"

#include "jvmci/jvmciEnv.hpp"

#include "jvmci/jvmciRuntime.hpp"

#include "runtime/compilationPolicy.hpp"

#include "runtime/globals_extension.hpp"

JVMCICompiler* JVMCICompiler::_instance = NULL;

elapsedTimer JVMCICompiler::_codeInstallTimer;

JVMCICompiler::JVMCICompiler() : AbstractCompiler(jvmci) {

  _bootstrapping = false;

  _methodsCompiled = 0;

  assert(_instance == NULL, "only one instance allowed");

  _instance = this;

}

// Initialization

void JVMCICompiler::initialize() {

  if (!UseCompiler || !EnableJVMCI || !UseJVMCICompiler || !should_perform_init()) {

    return;

  }

  set_state(initialized);

  // JVMCI is considered as application code so we need to

  // stop the VM deferring compilation now.

  CompilationPolicy::completed_vm_startup();

}

void JVMCICompiler::bootstrap() {

#ifndef PRODUCT

  // We turn off CompileTheWorld so that compilation requests are not

  // ignored during bootstrap or that JVMCI can be compiled by C1/C2.

  FlagSetting ctwOff(CompileTheWorld, false);

#endif

  JavaThread* THREAD = JavaThread::current();

  _bootstrapping = true;

  ResourceMark rm;

  HandleMark hm;

  if (PrintBootstrap) {

    tty->print("Bootstrapping JVMCI");

  }

  jlong start = os::javaTimeMillis();

  Array<Method*>* objectMethods = InstanceKlass::cast(SystemDictionary::Object_klass())->methods();

  // Initialize compile queue with a selected set of methods.

  int len = objectMethods->length();

  for (int i = 0; i < len; i++) {

    methodHandle mh = objectMethods->at(i);

    if (!mh->is_native() && !mh->is_static() && !mh->is_initializer()) {

      ResourceMark rm;

      int hot_count = 10; // TODO: what's the appropriate value?

      CompileBroker::compile_method(mh, InvocationEntryBci, CompLevel_full_optimization, mh, hot_count, "bootstrap", THREAD);

    }

  }

  int qsize;

  bool first_round = true;

  int z = 0;

  do {

    // Loop until there is something in the queue.

    do {

      os::sleep(THREAD, 100, true);

      qsize = CompileBroker::queue_size(CompLevel_full_optimization);

    } while (first_round && qsize == 0);

    first_round = false;

    if (PrintBootstrap) {

      while (z < (_methodsCompiled / 100)) {

        ++z;

        tty->print_raw(".");

      }

    }

  } while (qsize != 0);

  if (PrintBootstrap) {

    tty->print_cr(" in " JLONG_FORMAT " ms (compiled %d methods)", os::javaTimeMillis() - start, _methodsCompiled);

  }

  _bootstrapping = false;

}

void JVMCICompiler::compile_method(methodHandle method, int entry_bci, JVMCIEnv* env) {

  JVMCI_EXCEPTION_CONTEXT

  bool is_osr = entry_bci != InvocationEntryBci;

  if (_bootstrapping && is_osr) {

      // no OSR compilations during bootstrap - the compiler is just too slow at this point,

      // and we know that there are no endless loops

      return;

  }

  JVMCIRuntime::initialize_well_known_classes(CHECK_ABORT);

  HandleMark hm;

  ResourceMark rm;

  Handle receiver = JVMCIRuntime::get_HotSpotJVMCIRuntime(CHECK_ABORT);

  JavaValue method_result(T_OBJECT);

  {

    JavaCallArguments args;

    args.push_long((jlong) (address) method());

    JavaCalls::call_static(&method_result, SystemDictionary::HotSpotResolvedJavaMethodImpl_klass(), vmSymbols::fromMetaspace_name(), vmSymbols::method_fromMetaspace_signature(), &args, CHECK_ABORT);

  }

  JavaValue result(T_VOID);

  JavaCallArguments args;

  args.push_oop(receiver);

  args.push_oop((oop)method_result.get_jobject());

  args.push_int(entry_bci);

  args.push_long((jlong) (address) env);

  args.push_int(env->task()->compile_id());

  JavaCalls::call_special(&result, receiver->klass(), vmSymbols::compileMethod_name(), vmSymbols::compileMethod_signature(), &args, CHECK_ABORT);

  _methodsCompiled++;

}

// Compilation entry point for methods

void JVMCICompiler::compile_method(ciEnv* env, ciMethod* target, int entry_bci) {

  ShouldNotReachHere();

}

// Print compilation timers and statistics

void JVMCICompiler::print_timers() {

  print_compilation_timers();

}

// Print compilation timers and statistics

void JVMCICompiler::print_compilation_timers() {

  TRACE_jvmci_1("JVMCICompiler::print_timers");

  tty->print_cr("       JVMCI code install time:        %6.3f s",    _codeInstallTimer.seconds());

}