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 <iosfwd> 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 // Background GC triggered for a native allocation. 37 kGcCauseForNativeAllocBackground, 38 // GC triggered for a collector transition. 39 kGcCauseCollectorTransition, 40 // Not a real GC cause, used when we disable moving GC (currently for GetPrimitiveArrayCritical). 41 kGcCauseDisableMovingGc, 42 // Not a real GC cause, used when we trim the heap. 43 kGcCauseTrim, 44 // Not a real GC cause, used to implement exclusion between GC and instrumentation. 45 kGcCauseInstrumentation, 46 // Not a real GC cause, used to add or remove app image spaces. 47 kGcCauseAddRemoveAppImageSpace, 48 // Not a real GC cause, used to implement exclusion between GC and debugger. 49 kGcCauseDebugger, 50 // GC triggered for background transition when both foreground and background collector are CMS. 51 kGcCauseHomogeneousSpaceCompact, 52 // Class linker cause, used to guard filling art methods with special values. 53 kGcCauseClassLinker, 54 // Not a real GC cause, used to implement exclusion between code cache metadata and GC. 55 kGcCauseJitCodeCache, 56 // Not a real GC cause, used to add or remove system-weak holders. 57 kGcCauseAddRemoveSystemWeakHolder, 58 // Not a real GC cause, used to prevent hprof running in the middle of GC. 59 kGcCauseHprof, 60 // Not a real GC cause, used to prevent GetObjectsAllocated running in the middle of GC. 61 kGcCauseGetObjectsAllocated, 62 // GC cause for the profile saver. 63 kGcCauseProfileSaver, 64 }; 65 66 const char* PrettyCause(GcCause cause); 67 std::ostream& operator<<(std::ostream& os, const GcCause& gc_cause); 68 69 } // namespace gc 70 } // namespace art 71 72 #endif // ART_RUNTIME_GC_GC_CAUSE_H_ 73
