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 "memory/allocation.inline.hpp"
27 #include "runtime/thread.inline.hpp"
28 #include "runtime/threadSMR.hpp"
29 #include "services/threadService.hpp"
30
31 // 'entries + 1' so we always have at least one entry.
32 ThreadsList::ThreadsList(int entries) : _length(entries), _threads(NEW_C_HEAP_ARRAY(JavaThread*, entries + 1, mtGC)), _next_list(NULL) {
33 *(JavaThread**)(_threads + entries) = NULL; // Make sure the extra entry is NULL.
34 }
35
36 ThreadsList::~ThreadsList() {
37 FREE_C_HEAP_ARRAY(JavaThread*, _threads);
38 }
39
40 ThreadsListSetter::~ThreadsListSetter() {
41 if (_target_needs_release) {
42 // The hazard ptr in the target needs to be released.
43 Threads::release_stable_list(_target);
44 }
45 }
46
47 void ThreadsListSetter::set() {
48 assert(_target->get_threads_hazard_ptr() == NULL, "hazard ptr should not already be set");
49 (void) Threads::acquire_stable_list(_target, /* is_ThreadsListSetter */ true);
50 _target_needs_release = true;
51 }
52
53 ThreadsListHandle::ThreadsListHandle(Thread *self) : _list(Threads::acquire_stable_list(self, /* is_ThreadsListSetter */ false)), _self(self) {
54 assert(self == Thread::current(), "sanity check");
55 if (EnableThreadSMRStatistics) {
56 _timer.start();
57 }
58 }
59
60 ThreadsListHandle::~ThreadsListHandle() {
61 Threads::release_stable_list(_self);
62 if (EnableThreadSMRStatistics) {
63 _timer.stop();
64 jint millis = (jint)_timer.milliseconds();
65 Threads::inc_smr_tlh_cnt();
66 Threads::add_smr_tlh_times(millis);
67 Threads::update_smr_tlh_time_max(millis);
68 }
69 }
70
71 // Convert an internal thread reference to a JavaThread found on the
72 // associated ThreadsList. This ThreadsListHandle "protects" the
73 // returned JavaThread *.
74 //
75 // If thread_oop_p is not NULL, then the caller wants to use the oop
76 // after this call so the oop is returned. On success, *jt_pp is set
77 // to the converted JavaThread * and true is returned. On error,
78 // returns false.
79 //
80 bool ThreadsListHandle::cv_internal_thread_to_JavaThread(jobject jthread,
81 JavaThread ** jt_pp,
82 oop * thread_oop_p) {
83 assert(this->list() != NULL, "must have a ThreadsList");
84 assert(jt_pp != NULL, "must have a return JavaThread pointer");
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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 "memory/allocation.inline.hpp"
27 #include "runtime/thread.inline.hpp"
28 #include "runtime/threadSMR.hpp"
29 #include "services/threadService.hpp"
30
31 // 'entries + 1' so we always have at least one entry.
32 ThreadsList::ThreadsList(int entries) : _length(entries), _threads(NEW_C_HEAP_ARRAY(JavaThread*, entries + 1, mtThread)), _next_list(NULL) {
33 *(JavaThread**)(_threads + entries) = NULL; // Make sure the extra entry is NULL.
34 }
35
36 ThreadsList::~ThreadsList() {
37 FREE_C_HEAP_ARRAY(JavaThread*, _threads);
38 }
39
40 ThreadsListSetter::~ThreadsListSetter() {
41 if (_target_needs_release) {
42 // The hazard ptr in the target needs to be released.
43 Threads::release_stable_list(_target);
44 }
45 }
46
47 void ThreadsListSetter::set() {
48 assert(_target->get_threads_hazard_ptr() == NULL, "hazard ptr should not already be set");
49 (void) Threads::acquire_stable_list(_target, /* is_ThreadsListSetter */ true);
50 _target_needs_release = true;
51 }
52
53 ThreadsListHandle::ThreadsListHandle(Thread *self) : _list(Threads::acquire_stable_list(self, /* is_ThreadsListSetter */ false)), _self(self) {
54 assert(self == Thread::current(), "sanity check");
55 if (EnableThreadSMRStatistics) {
56 _timer.start();
57 }
58 }
59
60 ThreadsListHandle::~ThreadsListHandle() {
61 Threads::release_stable_list(_self);
62 if (EnableThreadSMRStatistics) {
63 _timer.stop();
64 uint millis = (uint)_timer.milliseconds();
65 Threads::inc_smr_tlh_cnt();
66 Threads::add_smr_tlh_times(millis);
67 Threads::update_smr_tlh_time_max(millis);
68 }
69 }
70
71 // Convert an internal thread reference to a JavaThread found on the
72 // associated ThreadsList. This ThreadsListHandle "protects" the
73 // returned JavaThread *.
74 //
75 // If thread_oop_p is not NULL, then the caller wants to use the oop
76 // after this call so the oop is returned. On success, *jt_pp is set
77 // to the converted JavaThread * and true is returned. On error,
78 // returns false.
79 //
80 bool ThreadsListHandle::cv_internal_thread_to_JavaThread(jobject jthread,
81 JavaThread ** jt_pp,
82 oop * thread_oop_p) {
83 assert(this->list() != NULL, "must have a ThreadsList");
84 assert(jt_pp != NULL, "must have a return JavaThread pointer");
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