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 "code/nmethod.hpp" 28 #include "unittest.hpp" 29 30 class TestDependencyContext { 31 public: 32 char* _buffer[sizeof(nmethod) * 3]; 33 nmethod* _nmethods[3]; 34 35 nmethodBucket* volatile _dependency_context; 36 volatile uint64_t _last_cleanup; 37 38 DependencyContext dependencies() { 39 DependencyContext depContext(&_dependency_context, &_last_cleanup); 40 return depContext; 41 } 42 43 TestDependencyContext() 44 : _dependency_context(NULL), 45 _last_cleanup(0) { 46 CodeCache_lock->lock_without_safepoint_check(); 47 48 memset(_buffer, 0, sizeof(nmethod) * 3); 49 _nmethods[0] = reinterpret_cast<nmethod*>(_buffer) + 0; 50 _nmethods[1] = reinterpret_cast<nmethod*>(_buffer) + 1; 51 _nmethods[2] = reinterpret_cast<nmethod*>(_buffer) + 2; 52 53 _nmethods[0]->clear_unloading_state(); 54 _nmethods[1]->clear_unloading_state(); 55 _nmethods[2]->clear_unloading_state(); 56 57 dependencies().add_dependent_nmethod(_nmethods[2]); 58 dependencies().add_dependent_nmethod(_nmethods[1]); 59 dependencies().add_dependent_nmethod(_nmethods[0]); 60 } 61 62 ~TestDependencyContext() { 63 wipe(); 64 CodeCache_lock->unlock(); 65 } 66 67 void wipe() { 68 DependencyContext ctx(&_dependency_context, &_last_cleanup); 69 nmethodBucket* b = ctx.dependencies(); 70 ctx.set_dependencies(NULL); 71 while (b != NULL) { 72 nmethodBucket* next = b->next(); 73 delete b; 74 b = next; 75 } 76 } 77 }; 78 79 static void test_remove_dependent_nmethod(int id) { 80 TestDependencyContext c; 81 DependencyContext depContext = c.dependencies(); 82 83 nmethod* nm = c._nmethods[id]; 84 depContext.remove_dependent_nmethod(nm); 85 86 NOT_PRODUCT(ASSERT_FALSE(depContext.is_dependent_nmethod(nm))); 87 } 88 89 TEST_VM(code, dependency_context) { 90 test_remove_dependent_nmethod(0); 91 test_remove_dependent_nmethod(1); 92 test_remove_dependent_nmethod(2); 93 }