1 /* 2 * Copyright (c) 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 #ifndef GTEST_THREADHELPER_INLINE_HPP 25 #define GTEST_THREADHELPER_INLINE_HPP 26 27 #include "runtime/mutex.hpp" 28 #include "runtime/semaphore.hpp" 29 #include "runtime/thread.hpp" 30 #include "runtime/vmThread.hpp" 31 #include "runtime/vmOperations.hpp" 32 #include "unittest.hpp" 33 34 class VM_StopSafepoint : public VM_Operation { 35 public: 36 Semaphore* _running; 37 Semaphore* _test_complete; 38 VM_StopSafepoint(Semaphore* running, Semaphore* wait_for) : 39 _running(running), _test_complete(wait_for) {} 40 VMOp_Type type() const { return VMOp_None; } 41 Mode evaluation_mode() const { return _no_safepoint; } 42 bool is_cheap_allocated() const { return false; } 43 void doit() { _running->signal(); _test_complete->wait(); } 44 }; 45 46 // This class and thread keep the non-safepoint op running while we do our testing. 47 class VMThreadBlocker : public JavaThread { 48 public: 49 Semaphore _ready; 50 Semaphore _unblock; 51 VMThreadBlocker() {} 52 virtual ~VMThreadBlocker() {} 53 void run() { 54 this->set_thread_state(_thread_in_vm); 55 { 56 MutexLocker ml(Threads_lock); 57 Threads::add(this); 58 } 59 VM_StopSafepoint ss(&_ready, &_unblock); 60 VMThread::execute(&ss); 61 Threads::remove(this); 62 this->smr_delete(); 63 } 64 void doit() { 65 if (os::create_thread(this, os::os_thread)) { 66 os::start_thread(this); 67 } else { 68 ASSERT_TRUE(false); 69 } 70 } 71 void ready() { 72 _ready.wait(); 73 } 74 void release() { 75 _unblock.signal(); 76 } 77 }; 78 79 // For testing in a real JavaThread. 80 class JavaTestThread : public JavaThread { 81 public: 82 Semaphore* _post; 83 JavaTestThread(Semaphore* post) 84 : _post(post) { 85 } 86 virtual ~JavaTestThread() {} 87 88 void prerun() { 89 this->set_thread_state(_thread_in_vm); 90 { 91 MutexLocker ml(Threads_lock); 92 Threads::add(this); 93 } 94 { 95 MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); 96 } 97 } 98 99 virtual void main_run() = 0; 100 101 void run() { 102 prerun(); 103 main_run(); 104 postrun(); 105 } 106 107 void postrun() { 108 Threads::remove(this); 109 _post->signal(); 110 this->smr_delete(); 111 } 112 113 void doit() { 114 if (os::create_thread(this, os::os_thread)) { 115 os::start_thread(this); 116 } else { 117 ASSERT_TRUE(false); 118 } 119 } 120 }; 121 122 template <typename FUNC> 123 class SingleTestThread : public JavaTestThread { 124 public: 125 FUNC& _f; 126 SingleTestThread(Semaphore* post, FUNC& f) 127 : JavaTestThread(post), _f(f) { 128 } 129 130 virtual ~SingleTestThread(){} 131 132 virtual void main_run() { 133 _f(this); 134 } 135 }; 136 137 template <typename TESTFUNC> 138 static void nomt_test_doer(TESTFUNC &f) { 139 Semaphore post; 140 141 VMThreadBlocker* blocker = new VMThreadBlocker(); 142 blocker->doit(); 143 blocker->ready(); 144 145 SingleTestThread<TESTFUNC>* stt = new SingleTestThread<TESTFUNC>(&post, f); 146 stt->doit(); 147 post.wait(); 148 149 blocker->release(); 150 } 151 152 template <typename RUNNER> 153 static void mt_test_doer() { 154 Semaphore post; 155 156 VMThreadBlocker* blocker = new VMThreadBlocker(); 157 blocker->doit(); 158 blocker->ready(); 159 160 RUNNER* runner = new RUNNER(&post); 161 runner->doit(); 162 post.wait(); 163 164 blocker->release(); 165 } 166 167 #endif // include guard