/*

 * Copyright (c) 2016, 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 "code/dependencyContext.hpp"

#include "unittest.hpp"

class TestDependencyContext {

 public:

  nmethod* _nmethods[3];

  intptr_t _dependency_context;

  DependencyContext dependencies() {

    DependencyContext depContext(&_dependency_context);

    return depContext;

  }

  TestDependencyContext() : _dependency_context(DependencyContext::EMPTY) {

    CodeCache_lock->lock_without_safepoint_check();

    _nmethods[0] = reinterpret_cast<nmethod*>(0x8 * 0);

    _nmethods[1] = reinterpret_cast<nmethod*>(0x8 * 1);

    _nmethods[2] = reinterpret_cast<nmethod*>(0x8 * 2);

    dependencies().add_dependent_nmethod(_nmethods[2]);

    dependencies().add_dependent_nmethod(_nmethods[1]);

    dependencies().add_dependent_nmethod(_nmethods[0]);

  }

  ~TestDependencyContext() {

    dependencies().wipe();

    CodeCache_lock->unlock();

  }

  static bool has_stale_entries(DependencyContext ctx) {

    return ctx.has_stale_entries();

  }

#ifndef PRODUCT

  static bool find_stale_entries(DependencyContext ctx) {

    return ctx.find_stale_entries();

  }

#endif

};

static void test_remove_dependent_nmethod(int id, bool delete_immediately) {

  TestDependencyContext c;

  DependencyContext depContext = c.dependencies();

  NOT_PRODUCT(ASSERT_FALSE(TestDependencyContext::find_stale_entries(depContext)));

  ASSERT_FALSE(TestDependencyContext::has_stale_entries(depContext));

  nmethod* nm = c._nmethods[id];

  depContext.remove_dependent_nmethod(nm, delete_immediately);

  if (!delete_immediately) {

    NOT_PRODUCT(ASSERT_TRUE(TestDependencyContext::find_stale_entries(depContext)));

    ASSERT_TRUE(TestDependencyContext::has_stale_entries(depContext));

    NOT_PRODUCT(ASSERT_TRUE(depContext.is_dependent_nmethod(nm)));

    depContext.expunge_stale_entries();

  }

  NOT_PRODUCT(ASSERT_FALSE(TestDependencyContext::find_stale_entries(depContext)));

  ASSERT_FALSE(TestDependencyContext::has_stale_entries(depContext));

  NOT_PRODUCT(ASSERT_FALSE(depContext.is_dependent_nmethod(nm)));

}

TEST_VM(code, dependency_context) {

  test_remove_dependent_nmethod(0, false);

  test_remove_dependent_nmethod(1, false);

  test_remove_dependent_nmethod(2, false);

  test_remove_dependent_nmethod(0, true);

  test_remove_dependent_nmethod(1, true);

  test_remove_dependent_nmethod(2, true);

}