| /* |
| * Copyright (C) 2018 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #ifndef SRC_PROFILING_COMMON_UNWIND_SUPPORT_H_ |
| #define SRC_PROFILING_COMMON_UNWIND_SUPPORT_H_ |
| |
| // defines PERFETTO_BUILDFLAG |
| #include "perfetto/base/build_config.h" |
| |
| #include <memory> |
| #include <string> |
| |
| #include <unwindstack/Maps.h> |
| #include <unwindstack/Unwinder.h> |
| #if PERFETTO_BUILDFLAG(PERFETTO_ANDROID_BUILD) |
| #include <unwindstack/DexFiles.h> |
| #include <unwindstack/JitDebug.h> |
| #endif |
| |
| #include "perfetto/base/logging.h" |
| #include "perfetto/base/time.h" |
| #include "perfetto/ext/base/scoped_file.h" |
| |
| namespace perfetto { |
| namespace profiling { |
| |
| // libunwindstack's FrameData annotated with the build_id. |
| struct FrameData { |
| FrameData(unwindstack::FrameData f, std::string id) |
| : frame(std::move(f)), build_id(std::move(id)) {} |
| |
| unwindstack::FrameData frame; |
| std::string build_id; |
| }; |
| |
| // Read /proc/[pid]/maps from an open file descriptor. |
| // TODO(fmayer): Figure out deduplication to other maps. |
| class FDMaps : public unwindstack::Maps { |
| public: |
| FDMaps(base::ScopedFile fd); |
| |
| FDMaps(const FDMaps&) = delete; |
| FDMaps& operator=(const FDMaps&) = delete; |
| |
| FDMaps(FDMaps&& m) : Maps(std::move(m)) { fd_ = std::move(m.fd_); } |
| |
| FDMaps& operator=(FDMaps&& m) { |
| if (&m != this) |
| fd_ = std::move(m.fd_); |
| Maps::operator=(std::move(m)); |
| return *this; |
| } |
| |
| virtual ~FDMaps() override = default; |
| |
| bool Parse() override; |
| void Reset(); |
| |
| private: |
| base::ScopedFile fd_; |
| }; |
| |
| class FDMemory : public unwindstack::Memory { |
| public: |
| FDMemory(base::ScopedFile mem_fd); |
| size_t Read(uint64_t addr, void* dst, size_t size) override; |
| |
| private: |
| base::ScopedFile mem_fd_; |
| }; |
| |
| // Overlays size bytes pointed to by stack for addresses in [sp, sp + size). |
| // Addresses outside of that range are read from mem_fd, which should be an fd |
| // that opened /proc/[pid]/mem. |
| class StackOverlayMemory : public unwindstack::Memory { |
| public: |
| StackOverlayMemory(std::shared_ptr<unwindstack::Memory> mem, |
| uint64_t sp, |
| uint8_t* stack, |
| size_t size); |
| size_t Read(uint64_t addr, void* dst, size_t size) override; |
| |
| private: |
| std::shared_ptr<unwindstack::Memory> mem_; |
| uint64_t sp_; |
| uint64_t stack_end_; |
| uint8_t* stack_; |
| }; |
| |
| struct UnwindingMetadata { |
| UnwindingMetadata(base::ScopedFile maps_fd, base::ScopedFile mem_fd); |
| |
| // move-only |
| UnwindingMetadata(const UnwindingMetadata&) = delete; |
| UnwindingMetadata& operator=(const UnwindingMetadata&) = delete; |
| |
| UnwindingMetadata(UnwindingMetadata&&) = default; |
| UnwindingMetadata& operator=(UnwindingMetadata&&) = default; |
| |
| void ReparseMaps(); |
| |
| FrameData AnnotateFrame(unwindstack::FrameData frame); |
| |
| FDMaps fd_maps; |
| // The API of libunwindstack expects shared_ptr for Memory. |
| std::shared_ptr<unwindstack::Memory> fd_mem; |
| uint64_t reparses = 0; |
| base::TimeMillis last_maps_reparse_time{0}; |
| #if PERFETTO_BUILDFLAG(PERFETTO_ANDROID_BUILD) |
| std::unique_ptr<unwindstack::JitDebug> jit_debug; |
| std::unique_ptr<unwindstack::DexFiles> dex_files; |
| #endif |
| }; |
| |
| std::string StringifyLibUnwindstackError(unwindstack::ErrorCode); |
| |
| } // namespace profiling |
| } // namespace perfetto |
| |
| #endif // SRC_PROFILING_COMMON_UNWIND_SUPPORT_H_ |