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 //
26 // Safepoint synchronization
27 ////
28 // The VMThread or CMS_thread uses the SafepointSynchronize::begin/end
29 // methods to enter/exit a safepoint region. The begin method will roll
30 // all JavaThreads forward to a safepoint.
31 //
32 // JavaThreads must use the ThreadSafepointState abstraction (defined in
33 // thread.hpp) to indicate that that they are at a safepoint.
34 //
35 // The Mutex/Condition variable and ObjectLocker classes calls the enter/
36 // exit safepoint methods, when a thread is blocked/restarted. Hence, all mutex exter/
37 // exit points *must* be at a safepoint.
38
39
40 class ThreadSafepointState;
41 class SnippetCache;
42 class nmethod;
43
44 //
215
216 // debugging
217 void print_on(outputStream* st) const;
218 void print() const { print_on(tty); }
219
220 // Initialize
221 static void create(JavaThread *thread);
222 static void destroy(JavaThread *thread);
223
224 void safepoint_msg(const char* format, ...) {
225 if (ShowSafepointMsgs) {
226 va_list ap;
227 va_start(ap, format);
228 tty->vprint_cr(format, ap);
229 va_end(ap);
230 }
231 }
232 };
233
234
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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 #ifndef SHARE_VM_RUNTIME_SAFEPOINT_HPP
26 #define SHARE_VM_RUNTIME_SAFEPOINT_HPP
27
28 #include "asm/assembler.hpp"
29 #include "code/nmethod.hpp"
30 #include "memory/allocation.hpp"
31 #include "runtime/extendedPC.hpp"
32 #include "runtime/os.hpp"
33 #include "utilities/ostream.hpp"
34
35 //
36 // Safepoint synchronization
37 ////
38 // The VMThread or CMS_thread uses the SafepointSynchronize::begin/end
39 // methods to enter/exit a safepoint region. The begin method will roll
40 // all JavaThreads forward to a safepoint.
41 //
42 // JavaThreads must use the ThreadSafepointState abstraction (defined in
43 // thread.hpp) to indicate that that they are at a safepoint.
44 //
45 // The Mutex/Condition variable and ObjectLocker classes calls the enter/
46 // exit safepoint methods, when a thread is blocked/restarted. Hence, all mutex exter/
47 // exit points *must* be at a safepoint.
48
49
50 class ThreadSafepointState;
51 class SnippetCache;
52 class nmethod;
53
54 //
225
226 // debugging
227 void print_on(outputStream* st) const;
228 void print() const { print_on(tty); }
229
230 // Initialize
231 static void create(JavaThread *thread);
232 static void destroy(JavaThread *thread);
233
234 void safepoint_msg(const char* format, ...) {
235 if (ShowSafepointMsgs) {
236 va_list ap;
237 va_start(ap, format);
238 tty->vprint_cr(format, ap);
239 va_end(ap);
240 }
241 }
242 };
243
244
245
246 #endif // SHARE_VM_RUNTIME_SAFEPOINT_HPP
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