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 "gc_implementation/g1/g1CollectedHeap.inline.hpp"
27 #include "gc_implementation/g1/g1CollectorPolicy.hpp"
28 #include "gc_implementation/g1/vm_operations_g1.hpp"
29 #include "gc_implementation/shared/isGCActiveMark.hpp"
30 #include "gc_implementation/g1/vm_operations_g1.hpp"
31 #include "runtime/interfaceSupport.hpp"
32
33 VM_G1CollectForAllocation::VM_G1CollectForAllocation(
34 unsigned int gc_count_before,
35 size_t word_size)
36 : VM_G1OperationWithAllocRequest(gc_count_before, word_size) {
37 guarantee(word_size > 0, "an allocation should always be requested");
38 }
39
40 void VM_G1CollectForAllocation::doit() {
41 G1CollectedHeap* g1h = G1CollectedHeap::heap();
42 _result = g1h->satisfy_failed_allocation(_word_size, &_pause_succeeded);
43 assert(_result == NULL || _pause_succeeded,
44 "if we get back a result, the pause should have succeeded");
45 }
148 // If the condition has already been reached, there's no point in
149 // actually taking the lock and doing the wait.
150 if (g1h->full_collections_completed() <=
151 _full_collections_completed_before) {
152 // The following is largely copied from CMS
153
154 Thread* thr = Thread::current();
155 assert(thr->is_Java_thread(), "invariant");
156 JavaThread* jt = (JavaThread*)thr;
157 ThreadToNativeFromVM native(jt);
158
159 MutexLockerEx x(FullGCCount_lock, Mutex::_no_safepoint_check_flag);
160 while (g1h->full_collections_completed() <=
161 _full_collections_completed_before) {
162 FullGCCount_lock->wait(Mutex::_no_safepoint_check_flag);
163 }
164 }
165 }
166 }
167
168 void VM_CGC_Operation::doit() {
169 gclog_or_tty->date_stamp(PrintGC && PrintGCDateStamps);
170 TraceCPUTime tcpu(PrintGCDetails, true, gclog_or_tty);
171 TraceTime t(_printGCMessage, PrintGC, true, gclog_or_tty);
172 SharedHeap* sh = SharedHeap::heap();
173 // This could go away if CollectedHeap gave access to _gc_is_active...
174 if (sh != NULL) {
175 IsGCActiveMark x;
176 _cl->do_void();
177 } else {
178 _cl->do_void();
179 }
180 }
181
182 bool VM_CGC_Operation::doit_prologue() {
183 Heap_lock->lock();
184 SharedHeap::heap()->_thread_holds_heap_lock_for_gc = true;
185 return true;
186 }
187
188 void VM_CGC_Operation::doit_epilogue() {
189 SharedHeap::heap()->_thread_holds_heap_lock_for_gc = false;
190 Heap_lock->unlock();
191 }
|
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 "gc_implementation/g1/concurrentMarkThread.inline.hpp"
27 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
28 #include "gc_implementation/g1/g1CollectorPolicy.hpp"
29 #include "gc_implementation/g1/vm_operations_g1.hpp"
30 #include "gc_implementation/shared/isGCActiveMark.hpp"
31 #include "gc_implementation/g1/vm_operations_g1.hpp"
32 #include "runtime/interfaceSupport.hpp"
33
34 VM_G1CollectForAllocation::VM_G1CollectForAllocation(
35 unsigned int gc_count_before,
36 size_t word_size)
37 : VM_G1OperationWithAllocRequest(gc_count_before, word_size) {
38 guarantee(word_size > 0, "an allocation should always be requested");
39 }
40
41 void VM_G1CollectForAllocation::doit() {
42 G1CollectedHeap* g1h = G1CollectedHeap::heap();
43 _result = g1h->satisfy_failed_allocation(_word_size, &_pause_succeeded);
44 assert(_result == NULL || _pause_succeeded,
45 "if we get back a result, the pause should have succeeded");
46 }
149 // If the condition has already been reached, there's no point in
150 // actually taking the lock and doing the wait.
151 if (g1h->full_collections_completed() <=
152 _full_collections_completed_before) {
153 // The following is largely copied from CMS
154
155 Thread* thr = Thread::current();
156 assert(thr->is_Java_thread(), "invariant");
157 JavaThread* jt = (JavaThread*)thr;
158 ThreadToNativeFromVM native(jt);
159
160 MutexLockerEx x(FullGCCount_lock, Mutex::_no_safepoint_check_flag);
161 while (g1h->full_collections_completed() <=
162 _full_collections_completed_before) {
163 FullGCCount_lock->wait(Mutex::_no_safepoint_check_flag);
164 }
165 }
166 }
167 }
168
169 void VM_CGC_Operation::acquire_pending_list_lock() {
170 // The caller may block while communicating
171 // with the SLT thread in order to acquire/release the PLL.
172 ConcurrentMarkThread::slt()->
173 manipulatePLL(SurrogateLockerThread::acquirePLL);
174 }
175
176 void VM_CGC_Operation::release_and_notify_pending_list_lock() {
177 // The caller may block while communicating
178 // with the SLT thread in order to acquire/release the PLL.
179 ConcurrentMarkThread::slt()->
180 manipulatePLL(SurrogateLockerThread::releaseAndNotifyPLL);
181 }
182
183 void VM_CGC_Operation::doit() {
184 gclog_or_tty->date_stamp(PrintGC && PrintGCDateStamps);
185 TraceCPUTime tcpu(PrintGCDetails, true, gclog_or_tty);
186 TraceTime t(_printGCMessage, PrintGC, true, gclog_or_tty);
187 SharedHeap* sh = SharedHeap::heap();
188 // This could go away if CollectedHeap gave access to _gc_is_active...
189 if (sh != NULL) {
190 IsGCActiveMark x;
191 _cl->do_void();
192 } else {
193 _cl->do_void();
194 }
195 }
196
197 bool VM_CGC_Operation::doit_prologue() {
198 // Note the relative order of the locks must match that in
199 // VM_GC_Operation::doit_prologue() or deadlocks can occur
200 acquire_pending_list_lock();
201
202 Heap_lock->lock();
203 SharedHeap::heap()->_thread_holds_heap_lock_for_gc = true;
204 return true;
205 }
206
207 void VM_CGC_Operation::doit_epilogue() {
208 // Note the relative order of the unlocks must match that in
209 // VM_GC_Operation::doit_epilogue()
210 SharedHeap::heap()->_thread_holds_heap_lock_for_gc = false;
211 Heap_lock->unlock();
212 release_and_notify_pending_list_lock();
213 }
|