107 lines
2.9 KiB
C++
107 lines
2.9 KiB
C++
/*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef SIMPLE_PERF_DSO_H_
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#define SIMPLE_PERF_DSO_H_
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#include <memory>
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#include <string>
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#include <unordered_map>
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#include <vector>
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#include "build_id.h"
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struct Symbol {
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uint64_t addr;
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uint64_t len;
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Symbol(const std::string& name, uint64_t addr, uint64_t len);
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const char* Name() const {
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return name_;
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}
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const char* DemangledName() const;
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private:
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const char* name_;
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mutable const char* demangled_name_;
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};
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enum DsoType {
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DSO_KERNEL,
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DSO_KERNEL_MODULE,
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DSO_ELF_FILE,
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};
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struct KernelSymbol;
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struct ElfFileSymbol;
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struct Dso {
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public:
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static void SetDemangle(bool demangle);
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static std::string Demangle(const std::string& name);
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static bool SetSymFsDir(const std::string& symfs_dir);
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static void SetVmlinux(const std::string& vmlinux);
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static void SetBuildIds(const std::vector<std::pair<std::string, BuildId>>& build_ids);
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static std::unique_ptr<Dso> CreateDso(DsoType dso_type, const std::string& dso_path = "");
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~Dso();
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// Return the path recorded in perf.data.
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const std::string& Path() const {
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return path_;
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}
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// Return the accessible path. It may be the same as Path(), or
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// return the path with prefix set by SetSymFsDir().
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std::string GetAccessiblePath() const;
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// Return the minimum virtual address in program header.
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uint64_t MinVirtualAddress();
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const Symbol* FindSymbol(uint64_t vaddr_in_dso);
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private:
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static BuildId GetExpectedBuildId(const std::string& filename);
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static bool KernelSymbolCallback(const KernelSymbol& kernel_symbol, Dso* dso);
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static void VmlinuxSymbolCallback(const ElfFileSymbol& elf_symbol, Dso* dso);
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static void ElfFileSymbolCallback(const ElfFileSymbol& elf_symbol, Dso* dso,
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bool (*filter)(const ElfFileSymbol&));
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static bool demangle_;
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static std::string symfs_dir_;
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static std::string vmlinux_;
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static std::unordered_map<std::string, BuildId> build_id_map_;
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static size_t dso_count_;
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Dso(DsoType type, const std::string& path);
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bool Load();
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bool LoadKernel();
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bool LoadKernelModule();
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bool LoadElfFile();
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bool LoadEmbeddedElfFile();
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void InsertSymbol(const Symbol& symbol);
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void FixupSymbolLength();
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const DsoType type_;
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const std::string path_;
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uint64_t min_vaddr_;
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std::vector<Symbol> symbols_;
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bool is_loaded_;
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};
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#endif // SIMPLE_PERF_DSO_H_
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