Skip to content

Commit

Permalink
Register all log files with cleaner
Browse files Browse the repository at this point in the history 
Ensures logs at other verbosity levels are cleaned up even if they are not logged
  • Loading branch information
@mturnock
mturnock committed Mar 12, 2024
1 parent 31429d8 commit b911cff
Showing 1 changed file with 106 additions and 50 deletions.
156 changes: 106 additions & 50 deletions src/logging.cc
View file
Original file line number Diff line number Diff line change
Expand Up @@ -40,6 +40,7 @@
#include <iterator>
#include <memory>
#include <mutex>
#include <set>
#include <shared_mutex>
#include <string>
#include <thread>
Expand Down Expand Up @@ -430,6 +431,17 @@ class LogFileObject : public base::Logger {
bool CreateLogfile(const string& time_pid_string);
};

struct LogCleanerFileInfo {
std::string dir;
std::string base_filename;
std::string filename_extension;
};

bool operator<(const LogCleanerFileInfo& l, const LogCleanerFileInfo& r) {
return std::tie(l.dir, l.base_filename, l.filename_extension) <
std::tie(r.dir, r.base_filename, r.filename_extension);
}

// Encapsulate all log cleaner related states
class LogCleaner {
public:
Expand All @@ -439,11 +451,11 @@ class LogCleaner {
void Enable(const std::chrono::minutes& overdue);
void Disable();

void Run(const std::chrono::system_clock::time_point& current_time,
bool base_filename_selected, const string& base_filename,
const string& filename_extension);
void RegisterLogFile(const std::string& path, const std::string& ext);
void UnregisterLogFile(const std::string& path, const std::string& ext);
void UnregisterAllLogFiles();

bool enabled() const { return enabled_; }
void Run(const std::chrono::system_clock::time_point& current_time);

private:
vector<string> GetOverdueLogNames(
Expand All @@ -459,11 +471,15 @@ class LogCleaner {
const string& filepath,
const std::chrono::system_clock::time_point& current_time) const;

std::string RemoveDuplicatePathDelimiters(const std::string& path) const;
std::string GetLogDir(const std::string& filepath) const;

bool enabled_{false};
std::chrono::minutes overdue_{
std::chrono::duration<int, std::ratio<kSecondsInWeek>>{1}};
std::chrono::system_clock::time_point
next_cleanup_time_; // cycle count at which to clean overdue log
std::chrono::system_clock::time_point next_cleanup_time_;
std::set<LogCleanerFileInfo> log_files_;
std::mutex mutex_;
};

LogCleaner log_cleaner;
Expand Down Expand Up @@ -929,7 +945,11 @@ LogFileObject::LogFileObject(LogSeverity severity, const char* base_filename)
filename_extension_(),
severity_(severity),
rollover_attempt_(kRolloverAttemptFrequency - 1),
start_time_(std::chrono::system_clock::now()) {}
start_time_(std::chrono::system_clock::now()) {
if (!base_filename_.empty()) {
log_cleaner.RegisterLogFile(base_filename_, filename_extension_);
}
}

LogFileObject::~LogFileObject() {
std::lock_guard<std::mutex> l{mutex_};
Expand All @@ -940,24 +960,36 @@ void LogFileObject::SetBasename(const char* basename) {
std::lock_guard<std::mutex> l{mutex_};
base_filename_selected_ = true;
if (base_filename_ != basename) {
if (!base_filename_.empty()) {
log_cleaner.UnregisterLogFile(base_filename_, filename_extension_);
}
// Get rid of old log file since we are changing names
if (file_ != nullptr) {
file_ = nullptr;
rollover_attempt_ = kRolloverAttemptFrequency - 1;
}
base_filename_ = basename;
if (!base_filename_.empty()) {
log_cleaner.RegisterLogFile(base_filename_, filename_extension_);
}
}
}

void LogFileObject::SetExtension(const char* ext) {
std::lock_guard<std::mutex> l{mutex_};
if (filename_extension_ != ext) {
if (!base_filename_.empty()) {
log_cleaner.UnregisterLogFile(base_filename_, filename_extension_);
}
// Get rid of old log file since we are changing names
if (file_ != nullptr) {
file_ = nullptr;
rollover_attempt_ = kRolloverAttemptFrequency - 1;
}
filename_extension_ = ext;
if (!base_filename_.empty()) {
log_cleaner.RegisterLogFile(base_filename_, filename_extension_);
}
}
}

Expand Down Expand Up @@ -1098,10 +1130,7 @@ void LogFileObject::Write(
}

auto cleanupLogs = [this, current_time = timestamp] {
if (log_cleaner.enabled()) {
log_cleaner.Run(current_time, base_filename_selected_, base_filename_,
filename_extension_);
}
log_cleaner.Run(current_time);
};

// Remove old logs
Expand Down Expand Up @@ -1181,6 +1210,7 @@ void LogFileObject::Write(
for (const auto& log_dir : log_dirs) {
base_filename_ = log_dir + "/" + stripped_filename;
if (CreateLogfile(time_pid_string)) {
log_cleaner.RegisterLogFile(base_filename_, filename_extension_);
success = true;
break;
}
Expand Down Expand Up @@ -1291,11 +1321,33 @@ void LogCleaner::Enable(const std::chrono::minutes& overdue) {

void LogCleaner::Disable() { enabled_ = false; }

void LogCleaner::Run(const std::chrono::system_clock::time_point& current_time,
bool base_filename_selected, const string& base_filename,
const string& filename_extension) {
assert(enabled_);
assert(!base_filename_selected || !base_filename.empty());
void LogCleaner::RegisterLogFile(const std::string& base_filepath,
const std::string& filename_extension) {
std::lock_guard<std::mutex> l{mutex_};
log_files_.insert({GetLogDir(base_filepath), base_filepath, filename_extension});

// Reset the next cleanup time so that the next Run() will clean up the new logs
next_cleanup_time_ = {};
}

void LogCleaner::UnregisterLogFile(const std::string& base_filepath,
const std::string& filename_extension) {
std::lock_guard<std::mutex> l{mutex_};
log_files_.erase({GetLogDir(base_filepath), base_filepath, filename_extension});
}

void LogCleaner::UnregisterAllLogFiles()
{
std::lock_guard<std::mutex> l{mutex_};
log_files_.clear();
}

void LogCleaner::Run(const std::chrono::system_clock::time_point& current_time) {
if (!enabled_) {
return;
}

std::lock_guard<std::mutex> l{mutex_};

// avoid scanning logs too frequently
if (current_time < next_cleanup_time_) {
Expand All @@ -1307,24 +1359,10 @@ void LogCleaner::Run(const std::chrono::system_clock::time_point& current_time,
std::chrono::duration_cast<std::chrono::system_clock::duration>(
std::chrono::duration<int32>{FLAGS_logcleansecs});

vector<string> dirs;

if (!base_filename_selected) {
dirs = GetLoggingDirectories();
} else {
size_t pos = base_filename.find_last_of(possible_dir_delim, string::npos,
sizeof(possible_dir_delim));
if (pos != string::npos) {
string dir = base_filename.substr(0, pos + 1);
dirs.push_back(dir);
} else {
dirs.emplace_back(".");
}
}

for (const std::string& dir : dirs) {
vector<string> logs = GetOverdueLogNames(dir, current_time, base_filename,
filename_extension);
for (const auto& log_file_info : log_files_) {
const auto logs = GetOverdueLogNames(log_file_info.dir, current_time,
log_file_info.base_filename,
log_file_info.filename_extension);
for (const std::string& log : logs) {
// NOTE May fail on Windows if the file is still open
int result = unlink(log.c_str());
Expand Down Expand Up @@ -1361,6 +1399,7 @@ vector<string> LogCleaner::GetOverdueLogNames(
log_directory[log_directory.size() - 1]) != dir_delim_end) {
filepath = log_directory + filepath;
}
filepath = RemoveDuplicatePathDelimiters(filepath);

if (IsLogFromCurrentProject(filepath, base_filename,
filename_extension) &&
Expand All @@ -1380,22 +1419,7 @@ bool LogCleaner::IsLogFromCurrentProject(
// We should remove duplicated delimiters from `base_filename`, e.g.,
// before: "/tmp//<base_filename>.<create_time>.<pid>"
// after: "/tmp/<base_filename>.<create_time>.<pid>"
string cleaned_base_filename;

const char* const dir_delim_end =
possible_dir_delim + sizeof(possible_dir_delim);

size_t real_filepath_size = filepath.size();
for (char c : base_filename) {
if (cleaned_base_filename.empty()) {
cleaned_base_filename += c;
} else if (std::find(possible_dir_delim, dir_delim_end, c) ==
dir_delim_end ||
(!cleaned_base_filename.empty() &&
c != cleaned_base_filename[cleaned_base_filename.size() - 1])) {
cleaned_base_filename += c;
}
}
string cleaned_base_filename = RemoveDuplicatePathDelimiters(base_filename);

// Return early if the filename doesn't start with `cleaned_base_filename`.
if (filepath.find(cleaned_base_filename) != 0) {
Expand All @@ -1405,6 +1429,7 @@ bool LogCleaner::IsLogFromCurrentProject(
// Check if in the string `filename_extension` is right next to
// `cleaned_base_filename` in `filepath` if the user
// has set a custom filename extension.
size_t real_filepath_size = filepath.size();
if (!filename_extension.empty()) {
if (cleaned_base_filename.size() >= real_filepath_size) {
return false;
Expand Down Expand Up @@ -1478,6 +1503,36 @@ bool LogCleaner::IsLogLastModifiedOver(
return false;
}

std::string LogCleaner::RemoveDuplicatePathDelimiters(const std::string& path) const {
string cleaned_path;

const char* const dir_delim_end =
possible_dir_delim + sizeof(possible_dir_delim);

for (char c : path) {
if (cleaned_path.empty()) {
cleaned_path += c;
} else if (std::find(possible_dir_delim, dir_delim_end, c) ==
dir_delim_end ||
(!cleaned_path.empty() &&
c != cleaned_path[cleaned_path.size() - 1])) {
cleaned_path += c;
}
}

return cleaned_path;
}

std::string LogCleaner::GetLogDir(const std::string& filepath) const {
const size_t pos = filepath.find_last_of(
possible_dir_delim, string::npos, sizeof(possible_dir_delim));
if (pos != std::string::npos) {
return filepath.substr(0, pos + 1);
} else {
return ".";
}
}

} // namespace

// Static log data space to avoid alloc failures in a LOG(FATAL)
Expand Down Expand Up @@ -2613,6 +2668,7 @@ void InstallPrefixFormatter(PrefixFormatterCallback callback, void* data) {
void ShutdownGoogleLogging() {
ShutdownGoogleLoggingUtilities();
LogDestination::DeleteLogDestinations();
log_cleaner.UnregisterAllLogFiles();
logging_directories_list = nullptr;
g_prefix_formatter = nullptr;
}
Expand Down

0 comments on commit b911cff

Please sign in to comment.