crashpad/util/linux/proc_stat_reader.h
Peter Boström 1aa478d161 Remove DISALLOW_* macros in crashpad
This change was partially scripted and partially done manually with vim
regex + manually placing the deleted constructors.

The script change looked for destructors in the public: section of a
class, if that existed the deleted constructors would go before the
destructor.

For manual placement I looked for any constructor in the public: section
of the corresponding class. If there wasn't one, then it would ideally
have gone as the first entry except below enums, classes and typedefs.
This may not have been perfect, but is hopefully good enough. Fingers
crossed.

#include "base/macros.h" is removed from files that don't use
ignore_result, which is the only other thing defined in base/macros.h.

Bug: chromium:1010217
Change-Id: I099526255a40b1ac1264904b4ece2f3f503c9418
Reviewed-on: https://chromium-review.googlesource.com/c/crashpad/crashpad/+/3171034
Reviewed-by: Mark Mentovai <mark@chromium.org>
Commit-Queue: Peter Boström <pbos@chromium.org>
2021-09-21 15:09:44 +00:00

85 lines
2.8 KiB
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// Copyright 2017 The Crashpad Authors. All rights reserved.
//
// 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 CRASHPAD_UTIL_LINUX_PROC_STAT_READER_H_
#define CRASHPAD_UTIL_LINUX_PROC_STAT_READER_H_
#include <stddef.h>
#include <sys/time.h>
#include <sys/types.h>
#include <string>
#include "util/linux/ptrace_connection.h"
#include "util/misc/initialization_state_dcheck.h"
namespace crashpad {
//! \brief Reads the /proc/[pid]/stat file for a thread.
class ProcStatReader {
public:
ProcStatReader();
ProcStatReader(const ProcStatReader&) = delete;
ProcStatReader& operator=(const ProcStatReader&) = delete;
~ProcStatReader();
//! \brief Initializes the reader.
//!
//! This method must be successfully called before calling any other.
//!
//! \param[in] connection A connection to the process to which the target
//! thread belongs.
//! \param[in] tid The thread ID to read the stat file for.
bool Initialize(PtraceConnection* connection, pid_t tid);
//! \brief Determines the time the thread has spent executing in user mode.
//!
//! \param[out] user_time The time spent executing in user mode.
//!
//! \return `true` on success, with \a user_time set. Otherwise, `false` with
//! a message logged.
bool UserCPUTime(timeval* user_time) const;
//! \brief Determines the time the thread has spent executing in system mode.
//!
//! \param[out] system_time The time spent executing in system mode.
//!
//! \return `true` on success, with \a system_time set. Otherwise, `false`
//! with a message logged.
bool SystemCPUTime(timeval* system_time) const;
//! \brief Determines the target threads start time.
//!
//! \param[in] boot_time The kernel boot time.
//! \param[out] start_time The time that the thread started.
//!
//! \return `true` on success, with \a start_time set. Otherwise, `false` with
//! a message logged.
bool StartTime(const timeval& boot_time, timeval* start_time) const;
private:
bool FindColumn(int index, const char** column) const;
bool ReadTimeAtIndex(int index, timeval* time_val) const;
std::string contents_;
size_t third_column_position_;
InitializationStateDcheck initialized_;
};
} // namespace crashpad
#endif // CRASHPAD_UTIL_LINUX_PROC_STAT_READER_H_