1 /* 2 * Copyright (C) 2014 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef ART_RUNTIME_GC_GC_CAUSE_H_ 18 #define ART_RUNTIME_GC_GC_CAUSE_H_ 19 20 #include <ostream> 21 22 namespace art { 23 namespace gc { 24 25 // What caused the GC? 26 enum GcCause { 27 // GC triggered by a failed allocation. Thread doing allocation is blocked waiting for GC before 28 // retrying allocation. 29 kGcCauseForAlloc, 30 // A background GC trying to ensure there is free memory ahead of allocations. 31 kGcCauseBackground, 32 // An explicit System.gc() call. 33 kGcCauseExplicit, 34 // GC triggered for a native allocation. 35 kGcCauseForNativeAlloc, 36 // GC triggered for a collector transition. 37 kGcCauseCollectorTransition, 38 // Not a real GC cause, used when we disable moving GC (currently for GetPrimitiveArrayCritical). 39 kGcCauseDisableMovingGc, 40 // Not a real GC cause, used when we trim the heap. 41 kGcCauseTrim, 42 // GC triggered for background transition when both foreground and background collector are CMS. 43 kGcCauseHomogeneousSpaceCompact, 44 }; 45 46 const char* PrettyCause(GcCause cause); 47 std::ostream& operator<<(std::ostream& os, const GcCause& gc_cause); 48 49 } // namespace gc 50 } // namespace art 51 52 #endif // ART_RUNTIME_GC_GC_CAUSE_H_ 53