364 lines
9.1 KiB
C++
364 lines
9.1 KiB
C++
//
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// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2019
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#include "td/utils/port/Stat.h"
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#include "td/utils/port/detail/PollableFd.h"
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#include "td/utils/port/FileFd.h"
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#if TD_PORT_POSIX
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#include "td/utils/format.h"
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#include "td/utils/logging.h"
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#include "td/utils/misc.h"
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#include "td/utils/port/Clocks.h"
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#include "td/utils/ScopeGuard.h"
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#include <utility>
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#if TD_DARWIN
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#include <mach/mach.h>
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#include <sys/time.h>
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#endif
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// We don't want warnings from system headers
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#if TD_GCC
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wconversion"
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#endif
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#include <sys/stat.h>
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#if TD_GCC
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#pragma GCC diagnostic pop
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#endif
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#if TD_ANDROID || TD_TIZEN
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#include <sys/syscall.h>
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#endif
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namespace td {
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namespace detail {
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template <class...>
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struct voider {
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using type = void;
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};
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template <class... T>
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using void_t = typename voider<T...>::type;
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template <class T, class = void>
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struct TimeNsec {
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static std::pair<int, int> get(const T &) {
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T().warning("Platform lacks support of precise access/modification file times, comment this line to continue");
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return {0, 0};
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}
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};
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// remove libc compatibility hacks if any: we have our own hacks
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#ifdef st_atimespec
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#undef st_atimespec
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#endif
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#ifdef st_atimensec
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#undef st_atimensec
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#endif
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#ifdef st_atime_nsec
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#undef st_atime_nsec
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#endif
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template <class T>
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struct TimeNsec<T, void_t<char, decltype(T::st_atimespec), decltype(T::st_mtimespec)>> {
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static std::pair<decltype(decltype(T::st_atimespec)::tv_nsec), decltype(decltype(T::st_mtimespec)::tv_nsec)> get(
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const T &s) {
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return {s.st_atimespec.tv_nsec, s.st_mtimespec.tv_nsec};
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}
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};
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template <class T>
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struct TimeNsec<T, void_t<short, decltype(T::st_atimensec), decltype(T::st_mtimensec)>> {
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static std::pair<decltype(T::st_atimensec), decltype(T::st_mtimensec)> get(const T &s) {
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return {s.st_atimensec, s.st_mtimensec};
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}
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};
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template <class T>
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struct TimeNsec<T, void_t<int, decltype(T::st_atim), decltype(T::st_mtim)>> {
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static std::pair<decltype(decltype(T::st_atim)::tv_nsec), decltype(decltype(T::st_mtim)::tv_nsec)> get(const T &s) {
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return {s.st_atim.tv_nsec, s.st_mtim.tv_nsec};
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}
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};
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template <class T>
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struct TimeNsec<T, void_t<long, decltype(T::st_atime_nsec), decltype(T::st_mtime_nsec)>> {
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static std::pair<decltype(T::st_atime_nsec), decltype(T::st_mtime_nsec)> get(const T &s) {
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return {s.st_atime_nsec, s.st_mtime_nsec};
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}
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};
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Stat from_native_stat(const struct ::stat &buf) {
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auto time_nsec = TimeNsec<struct ::stat>::get(buf);
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Stat res;
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res.atime_nsec_ = static_cast<uint64>(buf.st_atime) * 1000000000 + time_nsec.first;
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res.mtime_nsec_ = static_cast<uint64>(buf.st_mtime) * 1000000000 + time_nsec.second / 1000 * 1000;
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res.size_ = buf.st_size;
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res.is_dir_ = (buf.st_mode & S_IFMT) == S_IFDIR;
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res.is_reg_ = (buf.st_mode & S_IFMT) == S_IFREG;
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return res;
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}
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Result<Stat> fstat(int native_fd) {
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struct ::stat buf;
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int err = detail::skip_eintr([&] { return ::fstat(native_fd, &buf); });
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auto fstat_errno = errno;
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if (err < 0) {
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return Status::PosixError(fstat_errno, PSLICE() << "Stat for fd " << native_fd << " failed");
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}
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return detail::from_native_stat(buf);
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}
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Status update_atime(int native_fd) {
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#if TD_LINUX
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timespec times[2];
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// access time
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times[0].tv_nsec = UTIME_NOW;
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times[0].tv_sec = 0;
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// modify time
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times[1].tv_nsec = UTIME_OMIT;
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times[1].tv_sec = 0;
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if (futimens(native_fd, times) < 0) {
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auto status = OS_ERROR(PSLICE() << "futimens " << tag("fd", native_fd));
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LOG(WARNING) << status;
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return status;
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}
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return Status::OK();
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#elif TD_DARWIN
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TRY_RESULT(info, fstat(native_fd));
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timeval upd[2];
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auto now = Clocks::system();
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// access time
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upd[0].tv_sec = static_cast<decltype(upd[0].tv_sec)>(now);
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upd[0].tv_usec = static_cast<decltype(upd[0].tv_usec)>((now - static_cast<double>(upd[0].tv_sec)) * 1000000);
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// modify time
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upd[1].tv_sec = static_cast<decltype(upd[1].tv_sec)>(info.mtime_nsec_ / 1000000000ll);
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upd[1].tv_usec = static_cast<decltype(upd[1].tv_usec)>(info.mtime_nsec_ % 1000000000ll / 1000);
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if (futimes(native_fd, upd) < 0) {
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auto status = OS_ERROR(PSLICE() << "futimes " << tag("fd", native_fd));
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LOG(WARNING) << status;
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return status;
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}
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return Status::OK();
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#else
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return Status::Error("Not supported");
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// timespec times[2];
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//// access time
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// times[0].tv_nsec = UTIME_NOW;
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//// modify time
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// times[1].tv_nsec = UTIME_OMIT;
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//// int err = syscall(__NR_utimensat, native_fd, nullptr, times, 0);
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// if (futimens(native_fd, times) < 0) {
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// auto status = OS_ERROR(PSLICE() << "futimens " << tag("fd", native_fd));
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// LOG(WARNING) << status;
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// return status;
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// }
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// return Status::OK();
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#endif
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}
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} // namespace detail
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Status update_atime(CSlice path) {
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TRY_RESULT(file, FileFd::open(path, FileFd::Flags::Read));
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SCOPE_EXIT {
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file.close();
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};
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return detail::update_atime(file.get_native_fd().fd());
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}
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Result<Stat> stat(CSlice path) {
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struct ::stat buf;
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int err = detail::skip_eintr([&] { return ::stat(path.c_str(), &buf); });
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if (err < 0) {
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return OS_ERROR(PSLICE() << "Stat for file \"" << path << "\" failed");
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}
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return detail::from_native_stat(buf);
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}
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Result<MemStat> mem_stat() {
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#if TD_DARWIN
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task_basic_info t_info;
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mach_msg_type_number_t t_info_count = TASK_BASIC_INFO_COUNT;
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if (KERN_SUCCESS !=
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task_info(mach_task_self(), TASK_BASIC_INFO, reinterpret_cast<task_info_t>(&t_info), &t_info_count)) {
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return Status::Error("task_info failed");
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}
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MemStat res;
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res.resident_size_ = t_info.resident_size;
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res.virtual_size_ = t_info.virtual_size;
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res.resident_size_peak_ = 0;
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res.virtual_size_peak_ = 0;
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return res;
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#elif TD_LINUX || TD_ANDROID || TD_TIZEN
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TRY_RESULT(fd, FileFd::open("/proc/self/status", FileFd::Read));
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SCOPE_EXIT {
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fd.close();
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};
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constexpr int TMEM_SIZE = 10000;
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char mem[TMEM_SIZE];
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TRY_RESULT(size, fd.read(MutableSlice(mem, TMEM_SIZE - 1)));
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CHECK(size < TMEM_SIZE - 1);
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mem[size] = 0;
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const char *s = mem;
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MemStat res;
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while (*s) {
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const char *name_begin = s;
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while (*s != 0 && *s != '\n') {
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s++;
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}
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auto name_end = name_begin;
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while (is_alpha(*name_end)) {
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name_end++;
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}
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Slice name(name_begin, name_end);
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uint64 *x = nullptr;
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if (name == "VmPeak") {
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x = &res.virtual_size_peak_;
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}
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if (name == "VmSize") {
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x = &res.virtual_size_;
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}
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if (name == "VmHWM") {
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x = &res.resident_size_peak_;
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}
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if (name == "VmRSS") {
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x = &res.resident_size_;
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}
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if (x != nullptr) {
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Slice value(name_end, s);
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if (!value.empty() && value[0] == ':') {
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value.remove_prefix(1);
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}
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value = trim(value);
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value = split(value).first;
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auto r_mem = to_integer_safe<uint64>(value);
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if (r_mem.is_error()) {
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LOG(ERROR) << "Failed to parse memory stats " << tag("name", name) << tag("value", value);
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*x = static_cast<uint64>(-1);
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} else {
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*x = r_mem.ok() * 1024; // memory is in kB
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}
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}
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if (*s == 0) {
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break;
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}
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s++;
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}
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return res;
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#else
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return Status::Error("Not supported");
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#endif
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}
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#if TD_LINUX
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Status cpu_stat_self(CpuStat &stat) {
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TRY_RESULT(fd, FileFd::open("/proc/self/stat", FileFd::Read));
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SCOPE_EXIT {
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fd.close();
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};
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constexpr int TMEM_SIZE = 10000;
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char mem[TMEM_SIZE];
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TRY_RESULT(size, fd.read(MutableSlice(mem, TMEM_SIZE - 1)));
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CHECK(size < TMEM_SIZE - 1);
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mem[size] = 0;
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char *s = mem;
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char *t = mem + size;
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int pass_cnt = 0;
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while (pass_cnt < 15) {
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if (pass_cnt == 13) {
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stat.process_user_ticks = to_integer<uint64>(Slice(s, t));
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}
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if (pass_cnt == 14) {
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stat.process_system_ticks = to_integer<uint64>(Slice(s, t));
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}
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while (*s && *s != ' ') {
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s++;
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}
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if (*s == ' ') {
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s++;
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pass_cnt++;
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} else {
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return Status::Error("unexpected end of proc file");
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}
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}
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return Status::OK();
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}
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Status cpu_stat_total(CpuStat &stat) {
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TRY_RESULT(fd, FileFd::open("/proc/stat", FileFd::Read));
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SCOPE_EXIT {
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fd.close();
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};
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constexpr int TMEM_SIZE = 10000;
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char mem[TMEM_SIZE];
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TRY_RESULT(size, fd.read(MutableSlice(mem, TMEM_SIZE - 1)));
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CHECK(size < TMEM_SIZE - 1);
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mem[size] = 0;
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uint64 sum = 0, cur = 0;
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for (size_t i = 0; i < size; i++) {
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int c = mem[i];
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if (c >= '0' && c <= '9') {
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cur = cur * 10 + (uint64)c - '0';
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} else {
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sum += cur;
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cur = 0;
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if (c == '\n') {
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break;
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}
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}
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}
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stat.total_ticks = sum;
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return Status::OK();
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}
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#endif
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Result<CpuStat> cpu_stat() {
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#if TD_LINUX
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CpuStat stat;
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TRY_STATUS(cpu_stat_self(stat));
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TRY_STATUS(cpu_stat_total(stat));
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return stat;
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#else
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return Status::Error("Not supported");
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#endif
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}
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} // namespace td
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#endif
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#if TD_PORT_WINDOWS
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namespace td {
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Result<Stat> stat(CSlice path) {
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TRY_RESULT(fd, FileFd::open(path, FileFd::Flags::Read));
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return fd.stat();
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}
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Result<CpuStat> cpu_stat() {
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return Status::Error("Not supported");
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}
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} // namespace td
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#endif
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