1 /* 2 * Copyright (C) 2024 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_IMPORTERS_ETM_TARGET_MEMORY_H_ 18 #define SRC_TRACE_PROCESSOR_IMPORTERS_ETM_TARGET_MEMORY_H_ 19 20 #include <cstdint> 21 #include <optional> 22 23 #include "perfetto/ext/base/flat_hash_map.h" 24 #include "src/trace_processor/importers/etm/virtual_address_space.h" 25 #include "src/trace_processor/storage/trace_storage.h" 26 #include "src/trace_processor/types/destructible.h" 27 28 namespace perfetto::trace_processor { 29 class AddressRange; 30 class TraceProcessorContext; 31 namespace etm { 32 33 class MappingVersion; 34 35 // This class represents tracks the memory contents for all processes. 36 // It can answer queries in the form: At timestamp t, what was the mapping at 37 // address x for the thread tid. 38 class TargetMemory : public Destructible { 39 public: IsKernelAddress(uint64_t address)40 static bool IsKernelAddress(uint64_t address) { 41 return address & (1ull << 63); 42 } 43 44 static void InitStorage(TraceProcessorContext* context); Get(TraceStorage * storage)45 static const TargetMemory* Get(TraceStorage* storage) { 46 PERFETTO_DCHECK(storage->etm_target_memory() != nullptr); 47 return static_cast<const TargetMemory*>(storage->etm_target_memory()); 48 } 49 50 ~TargetMemory() override; 51 storage()52 TraceStorage* storage() const { return storage_; } 53 54 const MappingVersion* FindMapping(int64_t ts, 55 uint32_t tid, 56 uint64_t address) const; 57 const MappingVersion* FindMapping(int64_t ts, 58 uint32_t tid, 59 const AddressRange& range) const; 60 61 private: 62 explicit TargetMemory(TraceProcessorContext* context); 63 VirtualAddressSpace* FindUserSpaceForTid(uint32_t tid) const; 64 std::optional<UniquePid> FindUpidForTid(uint32_t tid) const; 65 66 TraceStorage* const storage_; 67 // Kernel memory is shared by all processes. 68 VirtualAddressSpace kernel_memory_; 69 70 base::FlatHashMap<UniquePid, VirtualAddressSpace> user_memory_; 71 72 // Cache for quick tid -> upid lookups. 73 // TODO(carlscab): This should probably live in `ProcessTracker` 74 mutable base::FlatHashMap<uint32_t, VirtualAddressSpace*> tid_to_space_; 75 }; 76 77 } // namespace etm 78 } // namespace perfetto::trace_processor 79 80 #endif // SRC_TRACE_PROCESSOR_IMPORTERS_ETM_TARGET_MEMORY_H_ 81