author | zgu |
Wed, 27 Nov 2019 11:52:57 -0500 | |
changeset 59296 | 9186be5c78ba |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2019, Red Hat, Inc. All rights reserved. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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#include "precompiled.hpp" |
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#include "gc/shenandoah/shenandoahBarrierSetNMethod.hpp" |
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#include "gc/shenandoah/shenandoahClosures.inline.hpp" |
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#include "gc/shenandoah/shenandoahCodeRoots.hpp" |
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#include "gc/shenandoah/shenandoahHeap.inline.hpp" |
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#include "gc/shenandoah/shenandoahLock.hpp" |
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#include "gc/shenandoah/shenandoahNMethod.inline.hpp" |
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#include "gc/shenandoah/shenandoahThreadLocalData.hpp" |
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#include "memory/iterator.hpp" |
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#include "memory/resourceArea.hpp" |
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bool ShenandoahBarrierSetNMethod::nmethod_entry_barrier(nmethod* nm) { |
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ShenandoahReentrantLock* lock = ShenandoahNMethod::lock_for_nmethod(nm); |
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assert(lock != NULL, "Must be"); |
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ShenandoahReentrantLocker locker(lock); |
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if (!is_armed(nm)) { |
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// Some other thread got here first and healed the oops |
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// and disarmed the nmethod. |
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return true; |
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} |
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if (nm->is_unloading()) { |
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// We don't need to take the lock when unlinking nmethods from |
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// the Method, because it is only concurrently unlinked by |
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// the entry barrier, which acquires the per nmethod lock. |
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nm->unlink_from_method(); |
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// We can end up calling nmethods that are unloading |
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// since we clear compiled ICs lazily. Returning false |
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// will re-resovle the call and update the compiled IC. |
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return false; |
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} |
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// Heal oops and disarm |
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ShenandoahEvacOOMScope scope; |
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ShenandoahNMethod::heal_nmethod(nm); |
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ShenandoahNMethod::disarm_nmethod(nm); |
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return true; |
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} |
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int ShenandoahBarrierSetNMethod::disarmed_value() const { |
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return ShenandoahCodeRoots::disarmed_value(); |
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} |
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ByteSize ShenandoahBarrierSetNMethod::thread_disarmed_offset() const { |
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return ShenandoahThreadLocalData::disarmed_value_offset(); |
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} |
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int* ShenandoahBarrierSetNMethod::disarmed_value_address() const { |
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return ShenandoahCodeRoots::disarmed_value_address(); |
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} |