1 /* 2 * Copyright (c) 2018, 2019, 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.inline.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 bool evaluate_at_safepoint() const { return false; } 42 void doit() { _running->signal(); _test_complete->wait(); } 43 }; 44 45 // This class and thread keep the non-safepoint op running while we do our testing. 46 class VMThreadBlocker : public JavaThread { 47 public: 48 Semaphore _ready; 49 Semaphore _unblock; 50 VMThreadBlocker() {} 51 virtual ~VMThreadBlocker() {} 52 const char* get_thread_name_string(char* buf, int buflen) const { 53 return "VMThreadBlocker"; 54 } 55 void run() { 56 this->set_thread_state(_thread_in_vm); 57 { 58 MutexLocker ml(Threads_lock); 59 Threads::add(this); 60 } 61 VM_StopSafepoint ss(&_ready, &_unblock); 62 VMThread::execute(&ss); 63 } 64 65 // Override as JavaThread::post_run() calls JavaThread::exit which 66 // expects a valid thread object oop. 67 virtual void post_run() { 68 Threads::remove(this, false); 69 this->smr_delete(); 70 } 71 72 void doit() { 73 if (os::create_thread(this, os::os_thread)) { 74 os::start_thread(this); 75 } else { 76 ASSERT_TRUE(false); 77 } 78 } 79 void ready() { 80 _ready.wait(); 81 } 82 void release() { 83 _unblock.signal(); 84 } 85 }; 86 87 // For testing in a real JavaThread. 88 class JavaTestThread : public JavaThread { 89 public: 90 Semaphore* _post; 91 JavaTestThread(Semaphore* post) 92 : _post(post) { 93 } 94 virtual ~JavaTestThread() {} 95 96 const char* get_thread_name_string(char* buf, int buflen) const { 97 return "JavaTestThread"; 98 } 99 100 void pre_run() { 101 this->set_thread_state(_thread_in_vm); 102 { 103 MutexLocker ml(Threads_lock); 104 Threads::add(this); 105 } 106 { 107 MutexLocker ml(SR_lock(), Mutex::_no_safepoint_check_flag); 108 } 109 } 110 111 virtual void main_run() = 0; 112 113 void run() { 114 main_run(); 115 } 116 117 // Override as JavaThread::post_run() calls JavaThread::exit which 118 // expects a valid thread object oop. And we need to call signal. 119 void post_run() { 120 Threads::remove(this, false); 121 _post->signal(); 122 this->smr_delete(); 123 } 124 125 void doit() { 126 if (os::create_thread(this, os::os_thread)) { 127 os::start_thread(this); 128 } else { 129 ASSERT_TRUE(false); 130 } 131 } 132 }; 133 134 template <typename FUNC> 135 class SingleTestThread : public JavaTestThread { 136 public: 137 FUNC& _f; 138 SingleTestThread(Semaphore* post, FUNC& f) 139 : JavaTestThread(post), _f(f) { 140 } 141 142 virtual ~SingleTestThread(){} 143 144 virtual void main_run() { 145 _f(this); 146 } 147 }; 148 149 template <typename TESTFUNC> 150 static void nomt_test_doer(TESTFUNC &f) { 151 Semaphore post; 152 153 VMThreadBlocker* blocker = new VMThreadBlocker(); 154 blocker->doit(); 155 blocker->ready(); 156 157 SingleTestThread<TESTFUNC>* stt = new SingleTestThread<TESTFUNC>(&post, f); 158 stt->doit(); 159 post.wait(); 160 161 blocker->release(); 162 } 163 164 template <typename RUNNER> 165 static void mt_test_doer() { 166 Semaphore post; 167 168 VMThreadBlocker* blocker = new VMThreadBlocker(); 169 blocker->doit(); 170 blocker->ready(); 171 172 RUNNER* runner = new RUNNER(&post); 173 runner->doit(); 174 post.wait(); 175 176 blocker->release(); 177 } 178 179 #endif // include guard