| File: | jdk/src/hotspot/share/gc/shenandoah/shenandoahEvacOOMHandler.inline.hpp |
| Warning: | line 35, column 8 Value stored to 'threads_in_evac' during its initialization is never read |
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| 1 | /* |
| 2 | * Copyright (c) 2020, Red Hat, Inc. All rights reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 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_GC_SHENANDOAH_SHENANDOAHEVACOOMHANDLER_INLINE_HPP |
| 26 | #define SHARE_GC_SHENANDOAH_SHENANDOAHEVACOOMHANDLER_INLINE_HPP |
| 27 | |
| 28 | #include "gc/shenandoah/shenandoahEvacOOMHandler.hpp" |
| 29 | |
| 30 | #include "gc/shenandoah/shenandoahHeap.inline.hpp" |
| 31 | #include "gc/shenandoah/shenandoahThreadLocalData.hpp" |
| 32 | #include "runtime/atomic.hpp" |
| 33 | |
| 34 | void ShenandoahEvacOOMHandler::enter_evacuation(Thread* thr) { |
| 35 | jint threads_in_evac = Atomic::load_acquire(&_threads_in_evac); |
Value stored to 'threads_in_evac' during its initialization is never read | |
| 36 | |
| 37 | uint8_t level = ShenandoahThreadLocalData::push_evac_oom_scope(thr); |
| 38 | if (level == 0) { |
| 39 | // Entering top level scope, register this thread. |
| 40 | register_thread(thr); |
| 41 | } else if (!ShenandoahThreadLocalData::is_oom_during_evac(thr)) { |
| 42 | jint threads_in_evac = Atomic::load_acquire(&_threads_in_evac); |
| 43 | // If OOM is in progress, handle it. |
| 44 | if ((threads_in_evac & OOM_MARKER_MASK) != 0) { |
| 45 | assert((threads_in_evac & ~OOM_MARKER_MASK) > 0, "sanity")do { if (!((threads_in_evac & ~OOM_MARKER_MASK) > 0)) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/gc/shenandoah/shenandoahEvacOOMHandler.inline.hpp" , 45, "assert(" "(threads_in_evac & ~OOM_MARKER_MASK) > 0" ") failed", "sanity"); ::breakpoint(); } } while (0); |
| 46 | Atomic::dec(&_threads_in_evac); |
| 47 | wait_for_no_evac_threads(); |
| 48 | } |
| 49 | } |
| 50 | } |
| 51 | |
| 52 | void ShenandoahEvacOOMHandler::leave_evacuation(Thread* thr) { |
| 53 | uint8_t level = ShenandoahThreadLocalData::pop_evac_oom_scope(thr); |
| 54 | // Not top level, just return |
| 55 | if (level > 1) { |
| 56 | return; |
| 57 | } |
| 58 | |
| 59 | // Leaving top level scope, unregister this thread. |
| 60 | unregister_thread(thr); |
| 61 | } |
| 62 | |
| 63 | ShenandoahEvacOOMScope::ShenandoahEvacOOMScope() : |
| 64 | _thread(Thread::current()) { |
| 65 | ShenandoahHeap::heap()->enter_evacuation(_thread); |
| 66 | } |
| 67 | |
| 68 | ShenandoahEvacOOMScope::ShenandoahEvacOOMScope(Thread* t) : |
| 69 | _thread(t) { |
| 70 | ShenandoahHeap::heap()->enter_evacuation(_thread); |
| 71 | } |
| 72 | |
| 73 | ShenandoahEvacOOMScope::~ShenandoahEvacOOMScope() { |
| 74 | ShenandoahHeap::heap()->leave_evacuation(_thread); |
| 75 | } |
| 76 | |
| 77 | #endif // SHARE_GC_SHENANDOAH_SHENANDOAHEVACOOMHANDLER_INLINE_HPP |