| File: | jdk/src/hotspot/share/gc/shenandoah/shenandoahGC.cpp |
| Warning: | line 69, column 21 Value stored to 'heap' during its initialization is never read |
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| 1 | /* |
| 2 | * Copyright (c) 2021, 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 | #include "precompiled.hpp" |
| 26 | |
| 27 | #include "compiler/oopMap.hpp" |
| 28 | #include "gc/shared/workerThread.hpp" |
| 29 | #include "gc/shenandoah/shenandoahClosures.inline.hpp" |
| 30 | #include "gc/shenandoah/shenandoahGC.hpp" |
| 31 | #include "gc/shenandoah/shenandoahHeap.hpp" |
| 32 | #include "gc/shenandoah/shenandoahPhaseTimings.hpp" |
| 33 | #include "gc/shenandoah/shenandoahRootProcessor.inline.hpp" |
| 34 | #include "gc/shenandoah/shenandoahUtils.hpp" |
| 35 | |
| 36 | const char* ShenandoahGC::degen_point_to_string(ShenandoahDegenPoint point) { |
| 37 | switch(point) { |
| 38 | case _degenerated_unset: |
| 39 | return "<UNSET>"; |
| 40 | case _degenerated_outside_cycle: |
| 41 | return "Outside of Cycle"; |
| 42 | case _degenerated_mark: |
| 43 | return "Mark"; |
| 44 | case _degenerated_evac: |
| 45 | return "Evacuation"; |
| 46 | case _degenerated_updaterefs: |
| 47 | return "Update References"; |
| 48 | default: |
| 49 | ShouldNotReachHere()do { (*g_assert_poison) = 'X';; report_should_not_reach_here( "/home/daniel/Projects/java/jdk/src/hotspot/share/gc/shenandoah/shenandoahGC.cpp" , 49); ::breakpoint(); } while (0); |
| 50 | return "ERROR"; |
| 51 | } |
| 52 | } |
| 53 | |
| 54 | class ShenandoahUpdateRootsTask : public WorkerTask { |
| 55 | private: |
| 56 | ShenandoahRootUpdater* _root_updater; |
| 57 | bool _check_alive; |
| 58 | public: |
| 59 | ShenandoahUpdateRootsTask(ShenandoahRootUpdater* root_updater, bool check_alive) : |
| 60 | WorkerTask("Shenandoah Update Roots"), |
| 61 | _root_updater(root_updater), |
| 62 | _check_alive(check_alive){ |
| 63 | } |
| 64 | |
| 65 | void work(uint worker_id) { |
| 66 | assert(ShenandoahSafepoint::is_at_shenandoah_safepoint(), "Must be at a safepoint")do { if (!(ShenandoahSafepoint::is_at_shenandoah_safepoint()) ) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/gc/shenandoah/shenandoahGC.cpp" , 66, "assert(" "ShenandoahSafepoint::is_at_shenandoah_safepoint()" ") failed", "Must be at a safepoint"); ::breakpoint(); } } while (0); |
| 67 | ShenandoahParallelWorkerSession worker_session(worker_id); |
| 68 | |
| 69 | ShenandoahHeap* heap = ShenandoahHeap::heap(); |
Value stored to 'heap' during its initialization is never read | |
| 70 | ShenandoahUpdateRefsClosure cl; |
| 71 | if (_check_alive) { |
| 72 | ShenandoahForwardedIsAliveClosure is_alive; |
| 73 | _root_updater->roots_do<ShenandoahForwardedIsAliveClosure, ShenandoahUpdateRefsClosure>(worker_id, &is_alive, &cl); |
| 74 | } else { |
| 75 | AlwaysTrueClosure always_true;; |
| 76 | _root_updater->roots_do<AlwaysTrueClosure, ShenandoahUpdateRefsClosure>(worker_id, &always_true, &cl); |
| 77 | } |
| 78 | } |
| 79 | }; |
| 80 | |
| 81 | void ShenandoahGC::update_roots(bool full_gc) { |
| 82 | assert(ShenandoahSafepoint::is_at_shenandoah_safepoint(), "Must be at a safepoint")do { if (!(ShenandoahSafepoint::is_at_shenandoah_safepoint()) ) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/gc/shenandoah/shenandoahGC.cpp" , 82, "assert(" "ShenandoahSafepoint::is_at_shenandoah_safepoint()" ") failed", "Must be at a safepoint"); ::breakpoint(); } } while (0); |
| 83 | assert(ShenandoahHeap::heap()->is_full_gc_in_progress() ||do { if (!(ShenandoahHeap::heap()->is_full_gc_in_progress( ) || ShenandoahHeap::heap()->is_degenerated_gc_in_progress ())) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/gc/shenandoah/shenandoahGC.cpp" , 85, "assert(" "ShenandoahHeap::heap()->is_full_gc_in_progress() || ShenandoahHeap::heap()->is_degenerated_gc_in_progress()" ") failed", "Only for degenerated GC and full GC"); ::breakpoint (); } } while (0) |
| 84 | ShenandoahHeap::heap()->is_degenerated_gc_in_progress(),do { if (!(ShenandoahHeap::heap()->is_full_gc_in_progress( ) || ShenandoahHeap::heap()->is_degenerated_gc_in_progress ())) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/gc/shenandoah/shenandoahGC.cpp" , 85, "assert(" "ShenandoahHeap::heap()->is_full_gc_in_progress() || ShenandoahHeap::heap()->is_degenerated_gc_in_progress()" ") failed", "Only for degenerated GC and full GC"); ::breakpoint (); } } while (0) |
| 85 | "Only for degenerated GC and full GC")do { if (!(ShenandoahHeap::heap()->is_full_gc_in_progress( ) || ShenandoahHeap::heap()->is_degenerated_gc_in_progress ())) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/gc/shenandoah/shenandoahGC.cpp" , 85, "assert(" "ShenandoahHeap::heap()->is_full_gc_in_progress() || ShenandoahHeap::heap()->is_degenerated_gc_in_progress()" ") failed", "Only for degenerated GC and full GC"); ::breakpoint (); } } while (0); |
| 86 | |
| 87 | bool check_alive = !full_gc; |
| 88 | ShenandoahPhaseTimings::Phase p = full_gc ? |
| 89 | ShenandoahPhaseTimings::full_gc_update_roots : |
| 90 | ShenandoahPhaseTimings::degen_gc_update_roots; |
| 91 | |
| 92 | ShenandoahGCPhase phase(p); |
| 93 | #if COMPILER2_OR_JVMCI1 |
| 94 | DerivedPointerTable::clear(); |
| 95 | #endif |
| 96 | |
| 97 | ShenandoahHeap* const heap = ShenandoahHeap::heap(); |
| 98 | WorkerThreads* workers = heap->workers(); |
| 99 | uint nworkers = workers->active_workers(); |
| 100 | |
| 101 | ShenandoahRootUpdater root_updater(nworkers, p); |
| 102 | ShenandoahUpdateRootsTask update_roots(&root_updater, check_alive); |
| 103 | workers->run_task(&update_roots); |
| 104 | |
| 105 | #if COMPILER2_OR_JVMCI1 |
| 106 | DerivedPointerTable::update_pointers(); |
| 107 | #endif |
| 108 | } |