1 /* 2 * Copyright (C) 2021 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 SRC_TRACE_PROCESSOR_UTIL_ANNOTATED_CALLSITES_H_ 18 #define SRC_TRACE_PROCESSOR_UTIL_ANNOTATED_CALLSITES_H_ 19 20 #include <optional> 21 #include <unordered_map> 22 #include <utility> 23 24 #include "src/trace_processor/containers/null_term_string_view.h" 25 #include "src/trace_processor/containers/string_pool.h" 26 #include "src/trace_processor/storage/trace_storage.h" 27 #include "src/trace_processor/tables/profiler_tables_py.h" 28 29 namespace perfetto::trace_processor { 30 31 class TraceProcessorContext; 32 33 enum class CallsiteAnnotation { 34 kNone, 35 kCommonFrame, 36 kCommonFrameInterp, 37 kArtInterpreted, 38 kArtJit, 39 kArtAot, 40 }; 41 42 // Helper class to augment callsite with (currently Android-specific) 43 // annotations. A given callsite will always have the same annotation. This 44 // class will internally cache already computed annotations. An annotation 45 // depends only of the current callsite and the annotations of its parent 46 // callsites (going to the root). 47 class AnnotatedCallsites { 48 public: 49 explicit AnnotatedCallsites(const TraceProcessorContext* context); 50 GetAnnotation(const tables::StackProfileCallsiteTable::ConstRowReference & callsite)51 CallsiteAnnotation GetAnnotation( 52 const tables::StackProfileCallsiteTable::ConstRowReference& callsite) { 53 return Get(callsite).second; 54 } 55 56 private: 57 enum class MapType { 58 kArtInterp, 59 kArtJit, 60 kArtAot, 61 kNativeLibart, 62 kNativeOther, 63 kOther 64 }; 65 66 // Annotation FSM states: 67 // * kInitial: default, native-only callstacks never leave this state. 68 // * kEraseLibart: we've seen a managed frame, and will now "erase" (i.e. tag 69 // as a common-frame) frames belonging to the ART runtime. 70 // * kKeepNext: we've seen a special JNI trampoline for managed->native 71 // transition, keep the immediate child (even if it is in ART), 72 // and then go back to kEraseLibart. 73 // Regardless of the state, managed frames get annotated with their execution 74 // mode, based on the mapping. 75 enum class State { kInitial, kEraseLibart, kKeepNext }; 76 77 State GetState(std::optional<CallsiteId> id); 78 79 std::pair<State, CallsiteAnnotation> Get( 80 const tables::StackProfileCallsiteTable::ConstRowReference& callsite); 81 82 MapType GetMapType(MappingId id); 83 static MapType ClassifyMap(NullTermStringView map); 84 85 const TraceProcessorContext& context_; 86 const std::optional<StringPool::Id> art_jni_trampoline_; 87 88 std::unordered_map<MappingId, MapType> map_types_; 89 std::unordered_map<CallsiteId, State> states_; 90 }; 91 92 } // namespace perfetto::trace_processor 93 94 #endif // SRC_TRACE_PROCESSOR_UTIL_ANNOTATED_CALLSITES_H_ 95