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 #include "precompiled.hpp"
25 #include "code/nmethod.hpp"
26 #include "gc/z/zBarrierSetNMethod.hpp"
27 #include "gc/z/zGlobals.hpp"
28 #include "gc/z/zLock.inline.hpp"
29 #include "gc/z/zOopClosures.hpp"
30 #include "gc/z/zNMethodTable.hpp"
31 #include "gc/z/zThreadLocalData.hpp"
32 #include "logging/log.hpp"
33
34 bool ZBarrierSetNMethod::nmethod_entry_barrier(nmethod* nm) {
35 ZLocker<ZReentrantLock> locker(ZNMethodTable::lock_for_nmethod(nm));
36 log_trace(nmethod, barrier)("Entered critical zone for %p", nm);
37
38 if (!is_armed(nm)) {
39 // Some other thread got here first and healed the oops
40 // and disarmed the nmethod.
41 return true;
42 }
43
44 if (nm->is_unloading()) {
45 // We don't need to take the lock when unlinking nmethods from
46 // the Method, because it is only concurrently unlinked by
47 // the entry barrier, which acquires the per nmethod lock.
48 nm->unlink_from_method(false /* acquire_lock */);
49
50 // We can end up calling nmethods that are unloading
51 // since we clear compiled ICs lazily. Returning false
52 // will re-resovle the call and update the compiled IC.
53 return false;
54 }
55
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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 #include "precompiled.hpp"
25 #include "code/nmethod.hpp"
26 #include "gc/z/zBarrierSetNMethod.hpp"
27 #include "gc/z/zGlobals.hpp"
28 #include "gc/z/zLock.inline.hpp"
29 #include "gc/z/zOopClosures.hpp"
30 #include "gc/z/zNMethod.hpp"
31 #include "gc/z/zThreadLocalData.hpp"
32 #include "logging/log.hpp"
33
34 bool ZBarrierSetNMethod::nmethod_entry_barrier(nmethod* nm) {
35 ZLocker<ZReentrantLock> locker(ZNMethod::lock_for_nmethod(nm));
36 log_trace(nmethod, barrier)("Entered critical zone for %p", nm);
37
38 if (!is_armed(nm)) {
39 // Some other thread got here first and healed the oops
40 // and disarmed the nmethod.
41 return true;
42 }
43
44 if (nm->is_unloading()) {
45 // We don't need to take the lock when unlinking nmethods from
46 // the Method, because it is only concurrently unlinked by
47 // the entry barrier, which acquires the per nmethod lock.
48 nm->unlink_from_method(false /* acquire_lock */);
49
50 // We can end up calling nmethods that are unloading
51 // since we clear compiled ICs lazily. Returning false
52 // will re-resovle the call and update the compiled IC.
53 return false;
54 }
55
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