1 /*
2 * Copyright (c) 1999, 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 *
155 * or anything else where we are not in control if we suddenly jump out.
156 */
157 class ThreadCrashProtection : public StackObj {
158 public:
159 static bool is_crash_protected(Thread* thr) {
160 return _crash_protection != NULL && _protected_thread == thr;
161 }
162
163 ThreadCrashProtection();
164 bool call(os::CrashProtectionCallback& cb);
165
166 static void check_crash_protection(int signal, Thread* thread);
167 private:
168 static Thread* _protected_thread;
169 static ThreadCrashProtection* _crash_protection;
170 static volatile intptr_t _crash_mux;
171 void restore();
172 sigjmp_buf _jmpbuf;
173 };
174
175 #ifndef SOLARIS
176
177 /*
178 * This is the platform-specific implementation underpinning
179 * the ParkEvent class, which itself underpins Java-level monitor
180 * operations. See park.hpp for details.
181 * These event objects are type-stable and immortal - we never delete them.
182 * Events are associated with a thread for the lifetime of the thread.
183 */
184 class PlatformEvent : public CHeapObj<mtSynchronizer> {
185 private:
186 double cachePad[4]; // Increase odds that _mutex is sole occupant of cache line
187 volatile int _event; // Event count/permit: -1, 0 or 1
188 volatile int _nParked; // Indicates if associated thread is blocked: 0 or 1
189 pthread_mutex_t _mutex[1]; // Native mutex for locking
190 pthread_cond_t _cond[1]; // Native condition variable for blocking
191 double postPad[2];
192
193 protected: // TODO-FIXME: make dtor private
194 ~PlatformEvent() { guarantee(false, "invariant"); } // immortal so can't delete
195
196 public:
318
319 #else
320
321 pthread_cond_t _cond;
322 pthread_cond_t* cond() { return &_cond; }
323
324 public:
325 PlatformMonitor();
326 ~PlatformMonitor();
327
328 #endif // PLATFORM_MONITOR_IMPL_INDIRECT
329
330 private:
331 NONCOPYABLE(PlatformMonitor);
332
333 public:
334 int wait(jlong millis);
335 void notify();
336 void notify_all();
337 };
338
339 #endif // !SOLARIS
340
341 #endif // OS_POSIX_OS_POSIX_HPP
|
1 /*
2 * Copyright (c) 1999, 2020, 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 *
155 * or anything else where we are not in control if we suddenly jump out.
156 */
157 class ThreadCrashProtection : public StackObj {
158 public:
159 static bool is_crash_protected(Thread* thr) {
160 return _crash_protection != NULL && _protected_thread == thr;
161 }
162
163 ThreadCrashProtection();
164 bool call(os::CrashProtectionCallback& cb);
165
166 static void check_crash_protection(int signal, Thread* thread);
167 private:
168 static Thread* _protected_thread;
169 static ThreadCrashProtection* _crash_protection;
170 static volatile intptr_t _crash_mux;
171 void restore();
172 sigjmp_buf _jmpbuf;
173 };
174
175 /*
176 * This is the platform-specific implementation underpinning
177 * the ParkEvent class, which itself underpins Java-level monitor
178 * operations. See park.hpp for details.
179 * These event objects are type-stable and immortal - we never delete them.
180 * Events are associated with a thread for the lifetime of the thread.
181 */
182 class PlatformEvent : public CHeapObj<mtSynchronizer> {
183 private:
184 double cachePad[4]; // Increase odds that _mutex is sole occupant of cache line
185 volatile int _event; // Event count/permit: -1, 0 or 1
186 volatile int _nParked; // Indicates if associated thread is blocked: 0 or 1
187 pthread_mutex_t _mutex[1]; // Native mutex for locking
188 pthread_cond_t _cond[1]; // Native condition variable for blocking
189 double postPad[2];
190
191 protected: // TODO-FIXME: make dtor private
192 ~PlatformEvent() { guarantee(false, "invariant"); } // immortal so can't delete
193
194 public:
316
317 #else
318
319 pthread_cond_t _cond;
320 pthread_cond_t* cond() { return &_cond; }
321
322 public:
323 PlatformMonitor();
324 ~PlatformMonitor();
325
326 #endif // PLATFORM_MONITOR_IMPL_INDIRECT
327
328 private:
329 NONCOPYABLE(PlatformMonitor);
330
331 public:
332 int wait(jlong millis);
333 void notify();
334 void notify_all();
335 };
336
337 #endif // OS_POSIX_OS_POSIX_HPP
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