/*
 * 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 "classfile/systemDictionary.hpp"
#include "graal/graalVMToCompiler.hpp"
#include "runtime/gpu.hpp"

// this is a *global* handle
jobject VMToCompiler::_graalRuntimePermObject = NULL;
jobject VMToCompiler::_vmToCompilerPermObject = NULL;
Klass* VMToCompiler::_vmToCompilerPermKlass = NULL;

static Klass* loadClass(Symbol* name) {
  Klass* klass = SystemDictionary::resolve_or_null(name, SystemDictionary::java_system_loader(), Handle(), Thread::current());
  if (klass == NULL) {
    tty->print_cr("Could not load class %s", name->as_C_string());
    vm_abort(false);
  }
  return klass;
}

KlassHandle VMToCompiler::vmToCompilerKlass() {
  if (_vmToCompilerPermKlass == NULL) {
    Klass* result = loadClass(vmSymbols::com_oracle_graal_hotspot_bridge_VMToCompiler());
    _vmToCompilerPermKlass = result;
  }
  return _vmToCompilerPermKlass;
}

Handle VMToCompiler::truffleRuntime() {
  Symbol* name = vmSymbols::com_oracle_graal_truffle_hotspot_HotSpotTruffleRuntime();
  KlassHandle klass = loadClass(name);

  JavaValue result(T_OBJECT);
  JavaCalls::call_static(&result, klass, vmSymbols::makeInstance_name(), vmSymbols::makeInstance_signature(), Thread::current());
  check_pending_exception("Couldn't initialize HotSpotTruffleRuntime");
  return Handle((oop) result.get_jobject());
}

Handle VMToCompiler::graalRuntime() {
  if (JNIHandles::resolve(_graalRuntimePermObject) == NULL) {
    KlassHandle klass = loadClass(vmSymbols::com_oracle_graal_hotspot_HotSpotGraalRuntime());
    JavaValue result(T_OBJECT);
    JavaCalls::call_static(&result, klass, vmSymbols::runtime_name(), vmSymbols::runtime_signature(), Thread::current());
    check_pending_exception("Couldn't initialize HotSpotGraalRuntime");
    _graalRuntimePermObject = JNIHandles::make_global((oop) result.get_jobject());
  }
  return Handle(JNIHandles::resolve_non_null(_graalRuntimePermObject));
}

Handle VMToCompiler::instance() {
  if (JNIHandles::resolve(_vmToCompilerPermObject) == NULL) {
    KlassHandle compilerKlass = loadClass(vmSymbols::com_oracle_graal_hotspot_HotSpotGraalRuntime());

    JavaValue result(T_OBJECT);
    JavaCallArguments args;
    args.set_receiver(graalRuntime());
    JavaCalls::call_virtual(&result, compilerKlass, vmSymbols::getVMToCompiler_name(), vmSymbols::getVMToCompiler_signature(), &args, Thread::current());
    check_pending_exception("Couldn't get VMToCompiler");
    _vmToCompilerPermObject = JNIHandles::make_global((oop) result.get_jobject());
  }
  return Handle(JNIHandles::resolve_non_null(_vmToCompilerPermObject));
}

void VMToCompiler::initOptions() {
  KlassHandle optionsKlass = loadClass(vmSymbols::com_oracle_graal_hotspot_HotSpotOptions());
  Thread* THREAD = Thread::current();
  optionsKlass->initialize(THREAD);
  check_pending_exception("Error while calling initOptions");
}

jboolean VMToCompiler::setOption(Handle option) {
  assert(!option.is_null(), "");
  KlassHandle optionsKlass = loadClass(vmSymbols::com_oracle_graal_hotspot_HotSpotOptions());

  Thread* THREAD = Thread::current();
  JavaValue result(T_BOOLEAN);
  JavaCalls::call_static(&result, optionsKlass, vmSymbols::setOption_name(), vmSymbols::setOption_signature(), option, THREAD);
  check_pending_exception("Error while calling setOption");
  return result.get_jboolean();
}

void VMToCompiler::finalizeOptions(jboolean ciTime) {
  KlassHandle optionsKlass = loadClass(vmSymbols::com_oracle_graal_hotspot_HotSpotOptions());
  Thread* THREAD = Thread::current();
  JavaValue result(T_VOID);
  JavaCallArguments args;
  args.push_int(ciTime);
  JavaCalls::call_static(&result, optionsKlass, vmSymbols::finalizeOptions_name(), vmSymbols::bool_void_signature(), &args, THREAD);
  check_pending_exception("Error while calling finalizeOptions");
}

void VMToCompiler::compileMethod(Method* method, int entry_bci, jlong ctask, jboolean blocking) {
  assert(method != NULL, "just checking");
  Thread* THREAD = Thread::current();
  JavaValue result(T_VOID);
  JavaCallArguments args;
  args.push_oop(instance());
  args.push_long((jlong) (address) method);
  args.push_int(entry_bci);
  args.push_long(ctask);
  args.push_int(blocking);
  JavaCalls::call_interface(&result, vmToCompilerKlass(), vmSymbols::compileMethod_name(), vmSymbols::compileMethod_signature(), &args, THREAD);
  check_pending_exception("Error while calling compileMethod");
}

void VMToCompiler::shutdownCompiler() {
  if (_graalRuntimePermObject != NULL) {
    HandleMark hm;
    JavaThread* THREAD = JavaThread::current();
    JavaValue result(T_VOID);
    JavaCallArguments args;
    args.push_oop(instance());
    JavaCalls::call_interface(&result, vmToCompilerKlass(), vmSymbols::shutdownCompiler_name(), vmSymbols::void_method_signature(), &args, THREAD);
    check_pending_exception("Error while calling shutdownCompiler");

    JNIHandles::destroy_global(_graalRuntimePermObject);
    JNIHandles::destroy_global(_vmToCompilerPermObject);
    //JNIHandles::destroy_global(_vmToCompilerPermKlass);

    _graalRuntimePermObject = NULL;
    _vmToCompilerPermObject = NULL;
    _vmToCompilerPermKlass = NULL;
  }
}

void VMToCompiler::startCompiler(jboolean bootstrap_enabled) {
  JavaThread* THREAD = JavaThread::current();
  JavaValue result(T_VOID);
  JavaCallArguments args;
  args.push_oop(instance());
  args.push_int(bootstrap_enabled);
  JavaCalls::call_interface(&result, vmToCompilerKlass(), vmSymbols::startCompiler_name(), vmSymbols::bool_void_signature(), &args, THREAD);
  check_pending_exception("Error while calling startCompiler");
}

void VMToCompiler::bootstrap() {
  JavaThread* THREAD = JavaThread::current();
  JavaValue result(T_VOID);
  JavaCallArguments args;
  args.push_oop(instance());
  JavaCalls::call_interface(&result, vmToCompilerKlass(), vmSymbols::bootstrap_name(), vmSymbols::void_method_signature(), &args, THREAD);
  check_pending_exception("Error while calling bootstrap");
}

void VMToCompiler::compileTheWorld() {
  JavaThread* THREAD = JavaThread::current();
  JavaValue result(T_VOID);
  JavaCallArguments args;
  args.push_oop(instance());
  JavaCalls::call_interface(&result, vmToCompilerKlass(), vmSymbols::compileTheWorld_name(), vmSymbols::void_method_signature(), &args, THREAD);
  check_pending_exception("Error while calling compileTheWorld");
}