1 /*
   2  * Copyright (c) 2016, 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 
  25 #include "precompiled.hpp"
  26 #include "code/dependencyContext.hpp"
  27 #include "unittest.hpp"
  28 
  29 class TestDependencyContext {
  30  public:
  31   nmethod* _nmethods[3];
  32 
  33   intptr_t _dependency_context;
  34 
  35   DependencyContext dependencies() {
  36     DependencyContext depContext(&_dependency_context);
  37     return depContext;
  38   }
  39 
  40   TestDependencyContext() : _dependency_context(DependencyContext::EMPTY) {
  41     CodeCache_lock->lock_without_safepoint_check();
  42 
  43     _nmethods[0] = reinterpret_cast<nmethod*>(0x8 * 0);
  44     _nmethods[1] = reinterpret_cast<nmethod*>(0x8 * 1);
  45     _nmethods[2] = reinterpret_cast<nmethod*>(0x8 * 2);
  46 
  47     dependencies().add_dependent_nmethod(_nmethods[2]);
  48     dependencies().add_dependent_nmethod(_nmethods[1]);
  49     dependencies().add_dependent_nmethod(_nmethods[0]);
  50   }
  51 
  52   ~TestDependencyContext() {
  53     dependencies().wipe();
  54     CodeCache_lock->unlock();
  55   }
  56 
  57   static bool has_stale_entries(DependencyContext ctx) {
  58     return ctx.has_stale_entries();
  59   }
  60 
  61 #ifndef PRODUCT
  62   static bool find_stale_entries(DependencyContext ctx) {
  63     return ctx.find_stale_entries();
  64   }
  65 #endif
  66 };
  67 
  68 static void test_remove_dependent_nmethod(int id, bool delete_immediately) {
  69   TestDependencyContext c;
  70   DependencyContext depContext = c.dependencies();
  71   NOT_PRODUCT(ASSERT_FALSE(TestDependencyContext::find_stale_entries(depContext)));
  72   ASSERT_FALSE(TestDependencyContext::has_stale_entries(depContext));
  73 
  74   nmethod* nm = c._nmethods[id];
  75   depContext.remove_dependent_nmethod(nm, delete_immediately);
  76 
  77   if (!delete_immediately) {
  78     NOT_PRODUCT(ASSERT_TRUE(TestDependencyContext::find_stale_entries(depContext)));
  79     ASSERT_TRUE(TestDependencyContext::has_stale_entries(depContext));
  80     NOT_PRODUCT(ASSERT_TRUE(depContext.is_dependent_nmethod(nm)));
  81     depContext.expunge_stale_entries();
  82   }
  83 
  84   NOT_PRODUCT(ASSERT_FALSE(TestDependencyContext::find_stale_entries(depContext)));
  85   ASSERT_FALSE(TestDependencyContext::has_stale_entries(depContext));
  86   NOT_PRODUCT(ASSERT_FALSE(depContext.is_dependent_nmethod(nm)));
  87 }
  88 
  89 TEST(code, dependency_context) {
  90   test_remove_dependent_nmethod(0, false);
  91   test_remove_dependent_nmethod(1, false);
  92   test_remove_dependent_nmethod(2, false);
  93 
  94   test_remove_dependent_nmethod(0, true);
  95   test_remove_dependent_nmethod(1, true);
  96   test_remove_dependent_nmethod(2, true);
  97 }