1 /* 2 * Copyright (c) 2016, 2018, 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 char* _buffer[sizeof(nmethod) * 3]; 32 nmethod* _nmethods[3]; 33 34 nmethodBucket* volatile _dependency_context; 35 volatile uint64_t _last_cleanup; 36 37 DependencyContext dependencies() { 38 DependencyContext depContext(&_dependency_context, &_last_cleanup); 39 return depContext; 40 } 41 42 TestDependencyContext() 43 : _dependency_context(NULL), 44 _last_cleanup(0) { 45 CodeCache_lock->lock_without_safepoint_check(); 46 47 memset(_buffer, 0, sizeof(nmethod) * 3); 48 _nmethods[0] = reinterpret_cast<nmethod*>(_buffer) + 0; 49 _nmethods[1] = reinterpret_cast<nmethod*>(_buffer) + 1; 50 _nmethods[2] = reinterpret_cast<nmethod*>(_buffer) + 2; 51 52 _nmethods[0]->clear_unloading_state(); 53 _nmethods[1]->clear_unloading_state(); 54 _nmethods[2]->clear_unloading_state(); 55 56 dependencies().add_dependent_nmethod(_nmethods[2]); 57 dependencies().add_dependent_nmethod(_nmethods[1]); 58 dependencies().add_dependent_nmethod(_nmethods[0]); 59 } 60 61 ~TestDependencyContext() { 62 wipe(); 63 CodeCache_lock->unlock(); 64 } 65 66 void wipe() { 67 DependencyContext ctx(&_dependency_context, &_last_cleanup); 68 nmethodBucket* b = ctx.dependencies(); 69 ctx.set_dependencies(NULL); 70 while (b != NULL) { 71 nmethodBucket* next = b->next(); 72 delete b; 73 b = next; 74 } 75 } 76 }; 77 78 static void test_remove_dependent_nmethod(int id) { 79 TestDependencyContext c; 80 DependencyContext depContext = c.dependencies(); 81 82 nmethod* nm = c._nmethods[id]; 83 depContext.remove_dependent_nmethod(nm); 84 85 NOT_PRODUCT(ASSERT_FALSE(depContext.is_dependent_nmethod(nm))); 86 } 87 88 TEST_VM(code, dependency_context) { 89 test_remove_dependent_nmethod(0); 90 test_remove_dependent_nmethod(1); 91 test_remove_dependent_nmethod(2); 92 }