/*

 * Copyright (c) 2011, 2019, 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 "compiler/compileBroker.hpp"

#include "classfile/moduleEntry.hpp"

#include "jvmci/jvmciEnv.hpp"

#include "jvmci/jvmciRuntime.hpp"

#include "oops/objArrayOop.inline.hpp"

#include "runtime/handles.inline.hpp"

JVMCICompiler* JVMCICompiler::_instance = NULL;

elapsedTimer JVMCICompiler::_codeInstallTimer;

JVMCICompiler::JVMCICompiler() : AbstractCompiler(compiler_jvmci) {

  _bootstrapping = false;

  _bootstrap_compilation_request_handled = false;

  _methods_compiled = 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);

}

void JVMCICompiler::bootstrap(TRAPS) {

  assert(THREAD->is_Java_thread(), "must be");

  if (Arguments::mode() == Arguments::_int) {

    // Nothing to do in -Xint mode

    return;

  }

  _bootstrapping = true;

  ResourceMark rm;

  HandleMark hm;

  if (PrintBootstrap) {

    tty->print("Bootstrapping JVMCI");

  }

  jlong start = os::javaTimeMillis();

  Array<Method*>* objectMethods = 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(THREAD, 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, CompileTask::Reason_Bootstrap, THREAD);

    }

  }

  int qsize;

  bool first_round = true;

  int z = 0;

  do {

    // Loop until there is something in the queue.

    do {

      ((JavaThread*)THREAD)->sleep(100);

      qsize = CompileBroker::queue_size(CompLevel_full_optimization);

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

    first_round = false;

    if (PrintBootstrap) {

      while (z < (_methods_compiled / 100)) {

        ++z;

        tty->print_raw(".");

      }

    }

  } while (qsize != 0);

  if (PrintBootstrap) {

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

  }

  _bootstrapping = false;

  JVMCI::compiler_runtime()->bootstrap_finished(CHECK);

}

bool JVMCICompiler::force_comp_at_level_simple(const methodHandle& method) {

  if (UseJVMCINativeLibrary) {

    // This mechanism exists to force compilation of a JVMCI compiler by C1

    // to reduces the compilation time spent on the JVMCI compiler itself. In

    // +UseJVMCINativeLibrary mode, the JVMCI compiler is AOT compiled.

    return false;

  }

  if (_bootstrapping) {

    // When bootstrapping, the JVMCI compiler can compile its own methods.

    return false;

  }

  JVMCIRuntime* runtime = JVMCI::compiler_runtime();

  if (runtime != NULL && runtime->is_HotSpotJVMCIRuntime_initialized()) {

    JavaThread* thread = JavaThread::current();

    HandleMark hm(thread);

    THREAD_JVMCIENV(thread);

    JVMCIObject receiver = runtime->get_HotSpotJVMCIRuntime(JVMCIENV);

    objArrayHandle excludeModules(thread, HotSpotJVMCI::HotSpotJVMCIRuntime::excludeFromJVMCICompilation(JVMCIENV, HotSpotJVMCI::resolve(receiver)));

    if (excludeModules.not_null()) {

      ModuleEntry* moduleEntry = method->method_holder()->module();

      for (int i = 0; i < excludeModules->length(); i++) {

        if (excludeModules->obj_at(i) == moduleEntry->module()) {

          return true;

        }

      }

    }

  }

  return false;

}

// Compilation entry point for methods

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

  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());

}