// Copyright 2016 The Chromium OS Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef CHROMIUMOS_WIDE_PROFILING_DSO_H_
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#define CHROMIUMOS_WIDE_PROFILING_DSO_H_
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#include <sys/stat.h>
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#include <unordered_set>
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#include <utility>
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#include "compat/string.h"
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#include "data_reader.h"
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namespace quipper {
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// Defines a type for a pid:tid pair.
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using PidTid = std::pair<u32, u32>;
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// A struct containing all relevant info for a mapped DSO, independent of any
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// samples.
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struct DSOInfo {
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string name;
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string build_id;
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u32 maj = 0;
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u32 min = 0;
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u64 ino = 0;
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bool hit = false; // Have we seen any samples in this DSO?
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// unordered_set of pids this DSO had samples in.
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std::unordered_set<uint64_t> threads;
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};
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// Do the |DSOInfo| and |struct stat| refer to the same inode?
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bool SameInode(const DSOInfo& dso, const struct stat* s);
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// Must be called at least once before using libelf.
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void InitializeLibelf();
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// Read buildid from an ELF file using libelf.
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bool ReadElfBuildId(const string& filename, string* buildid);
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bool ReadElfBuildId(int fd, string* buildid);
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// Read buildid from /sys/module/<module_name>/notes/.note.gnu.build-id
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// (Does not use libelf.)
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bool ReadModuleBuildId(const string& module_name, string* buildid);
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// Read builid from Elf note data section.
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bool ReadBuildIdNote(DataReader* data, string* buildid);
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// Is |name| match one of the things reported by the kernel that is known
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// not to be a kernel module?
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bool IsKernelNonModuleName(string name);
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} // namespace quipper
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#endif // CHROMIUMOS_WIDE_PROFILING_DSO_H_
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