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76 lines
2.9 KiB
76 lines
2.9 KiB
/*
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* Copyright (C) 2014 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ART_RUNTIME_GC_GC_CAUSE_H_
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#define ART_RUNTIME_GC_GC_CAUSE_H_
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#include <iosfwd>
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namespace art {
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namespace gc {
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// What caused the GC?
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enum GcCause {
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// Invalid GC cause used as a placeholder.
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kGcCauseNone,
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// GC triggered by a failed allocation. Thread doing allocation is blocked waiting for GC before
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// retrying allocation.
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kGcCauseForAlloc,
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// A background GC trying to ensure there is free memory ahead of allocations.
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kGcCauseBackground,
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// An explicit System.gc() call.
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kGcCauseExplicit,
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// GC triggered for a native allocation when NativeAllocationGcWatermark is exceeded.
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// (This may be a blocking GC depending on whether we run a non-concurrent collector).
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kGcCauseForNativeAlloc,
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// GC triggered for a collector transition.
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kGcCauseCollectorTransition,
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// Not a real GC cause, used when we disable moving GC (currently for GetPrimitiveArrayCritical).
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kGcCauseDisableMovingGc,
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// Not a real GC cause, used when we trim the heap.
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kGcCauseTrim,
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// Not a real GC cause, used to implement exclusion between GC and instrumentation.
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kGcCauseInstrumentation,
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// Not a real GC cause, used to add or remove app image spaces.
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kGcCauseAddRemoveAppImageSpace,
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// Not a real GC cause, used to implement exclusion between GC and debugger.
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kGcCauseDebugger,
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// GC triggered for background transition when both foreground and background collector are CMS.
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kGcCauseHomogeneousSpaceCompact,
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// Class linker cause, used to guard filling art methods with special values.
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kGcCauseClassLinker,
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// Not a real GC cause, used to implement exclusion between code cache metadata and GC.
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kGcCauseJitCodeCache,
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// Not a real GC cause, used to add or remove system-weak holders.
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kGcCauseAddRemoveSystemWeakHolder,
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// Not a real GC cause, used to prevent hprof running in the middle of GC.
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kGcCauseHprof,
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// Not a real GC cause, used to prevent GetObjectsAllocated running in the middle of GC.
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kGcCauseGetObjectsAllocated,
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// GC cause for the profile saver.
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kGcCauseProfileSaver,
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// GC cause for running an empty checkpoint.
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kGcCauseRunEmptyCheckpoint,
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};
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const char* PrettyCause(GcCause cause);
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std::ostream& operator<<(std::ostream& os, const GcCause& gc_cause);
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} // namespace gc
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} // namespace art
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#endif // ART_RUNTIME_GC_GC_CAUSE_H_
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