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Merge pull request #6869 from yzct12345/shiny-logs-in-the-fireplace 

logging: Simplify and make thread-safe
This commit is contained in:
bunnei 2021-08-22 20:40:18 -07:00 committed by GitHub
parent a428a843cb 001675dced
commit f65f8b9097
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GPG Key ID: 4AEE18F83AFDEB23
8 changed files with 248 additions and 297 deletions
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336
src/common/logging/backend.cpp
View File

@ -2,13 +2,9 @@
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <algorithm>
#include <atomic>
#include <chrono>
#include <climits>
#include <condition_variable>
#include <memory>
#include <mutex>
#include <thread>
#include <vector>
@ -16,28 +12,173 @@
#include <windows.h> // For OutputDebugStringW
#endif
#include "common/assert.h"
#include "common/fs/file.h"
#include "common/fs/fs.h"
#include "common/fs/fs_paths.h"
#include "common/fs/path_util.h"
#include "common/literals.h"
#include "common/logging/backend.h"
#include "common/logging/log.h"
#include "common/logging/text_formatter.h"
#include "common/settings.h"
#ifdef _WIN32
#include "common/string_util.h"
#endif
#include "common/threadsafe_queue.h"
namespace Common::Log {
namespace {
/**
* Interface for logging backends.
*/
class Backend {
public:
virtual ~Backend() = default;
virtual void Write(const Entry& entry) = 0;
virtual void EnableForStacktrace() = 0;
virtual void Flush() = 0;
};
/**
* Backend that writes to stderr and with color
*/
class ColorConsoleBackend final : public Backend {
public:
explicit ColorConsoleBackend() = default;
~ColorConsoleBackend() override = default;
void Write(const Entry& entry) override {
if (enabled.load(std::memory_order_relaxed)) {
PrintColoredMessage(entry);
}
}
void Flush() override {
// stderr shouldn't be buffered
}
void EnableForStacktrace() override {
enabled = true;
}
void SetEnabled(bool enabled_) {
enabled = enabled_;
}
private:
std::atomic_bool enabled{false};
};
/**
* Backend that writes to a file passed into the constructor
*/
class FileBackend final : public Backend {
public:
explicit FileBackend(const std::filesystem::path& filename) {
auto old_filename = filename;
old_filename += ".old.txt";
// Existence checks are done within the functions themselves.
// We don't particularly care if these succeed or not.
static_cast<void>(FS::RemoveFile(old_filename));
static_cast<void>(FS::RenameFile(filename, old_filename));
file = std::make_unique<FS::IOFile>(filename, FS::FileAccessMode::Write,
FS::FileType::TextFile);
}
~FileBackend() override = default;
void Write(const Entry& entry) override {
if (!enabled) {
return;
}
bytes_written += file->WriteString(FormatLogMessage(entry).append(1, '\n'));
using namespace Common::Literals;
// Prevent logs from exceeding a set maximum size in the event that log entries are spammed.
const auto write_limit = Settings::values.extended_logging ? 1_GiB : 100_MiB;
const bool write_limit_exceeded = bytes_written > write_limit;
if (entry.log_level >= Level::Error || write_limit_exceeded) {
if (write_limit_exceeded) {
// Stop writing after the write limit is exceeded.
// Don't close the file so we can print a stacktrace if necessary
enabled = false;
}
file->Flush();
}
}
void Flush() override {
file->Flush();
}
void EnableForStacktrace() override {
enabled = true;
bytes_written = 0;
}
private:
std::unique_ptr<FS::IOFile> file;
bool enabled = true;
std::size_t bytes_written = 0;
};
/**
* Backend that writes to Visual Studio's output window
*/
class DebuggerBackend final : public Backend {
public:
explicit DebuggerBackend() = default;
~DebuggerBackend() override = default;
void Write(const Entry& entry) override {
#ifdef _WIN32
::OutputDebugStringW(UTF8ToUTF16W(FormatLogMessage(entry).append(1, '\n')).c_str());
#endif
}
void Flush() override {}
void EnableForStacktrace() override {}
};
bool initialization_in_progress_suppress_logging = false;
/**
* Static state as a singleton.
*/
class Impl {
public:
static Impl& Instance() {
static Impl backend;
return backend;
if (!instance) {
abort();
}
return *instance;
}
static void Initialize() {
if (instance) {
abort();
}
using namespace Common::FS;
initialization_in_progress_suppress_logging = true;
const auto& log_dir = GetYuzuPath(YuzuPath::LogDir);
void(CreateDir(log_dir));
Filter filter;
filter.ParseFilterString(Settings::values.log_filter.GetValue());
instance = std::unique_ptr<Impl, decltype(&Deleter)>(new Impl(log_dir / LOG_FILE, filter),
Deleter);
initialization_in_progress_suppress_logging = false;
}
Impl(const Impl&) = delete;
@ -46,74 +187,54 @@ public:
Impl(Impl&&) = delete;
Impl& operator=(Impl&&) = delete;
void PushEntry(Class log_class, Level log_level, const char* filename, unsigned int line_num,
const char* function, std::string message) {
message_queue.Push(
CreateEntry(log_class, log_level, filename, line_num, function, std::move(message)));
}
void AddBackend(std::unique_ptr<Backend> backend) {
std::lock_guard lock{writing_mutex};
backends.push_back(std::move(backend));
}
void RemoveBackend(std::string_view backend_name) {
std::lock_guard lock{writing_mutex};
std::erase_if(backends, [&backend_name](const auto& backend) {
return backend_name == backend->GetName();
});
}
const Filter& GetGlobalFilter() const {
return filter;
}
void SetGlobalFilter(const Filter& f) {
filter = f;
}
Backend* GetBackend(std::string_view backend_name) {
const auto it =
std::find_if(backends.begin(), backends.end(),
[&backend_name](const auto& i) { return backend_name == i->GetName(); });
if (it == backends.end())
return nullptr;
return it->get();
void SetColorConsoleBackendEnabled(bool enabled) {
color_console_backend.SetEnabled(enabled);
}
void PushEntry(Class log_class, Level log_level, const char* filename, unsigned int line_num,
const char* function, std::string message) {
if (!filter.CheckMessage(log_class, log_level))
return;
const Entry& entry =
CreateEntry(log_class, log_level, filename, line_num, function, std::move(message));
message_queue.Push(entry);
}
private:
Impl() {
backend_thread = std::thread([&] {
Impl(const std::filesystem::path& file_backend_filename, const Filter& filter_)
: filter{filter_}, file_backend{file_backend_filename}, backend_thread{std::thread([this] {
Common::SetCurrentThreadName("yuzu:Log");
Entry entry;
auto write_logs = [&](Entry& e) {
std::lock_guard lock{writing_mutex};
for (const auto& backend : backends) {
backend->Write(e);
}
const auto write_logs = [this, &entry]() {
ForEachBackend([&entry](Backend& backend) { backend.Write(entry); });
};
while (true) {
entry = message_queue.PopWait();
if (entry.final_entry) {
break;
}
write_logs(entry);
write_logs();
}
// Drain the logging queue. Only writes out up to MAX_LOGS_TO_WRITE to prevent a
// case where a system is repeatedly spamming logs even on close.
const int MAX_LOGS_TO_WRITE = filter.IsDebug() ? INT_MAX : 100;
int logs_written = 0;
while (logs_written++ < MAX_LOGS_TO_WRITE && message_queue.Pop(entry)) {
write_logs(entry);
}
});
int max_logs_to_write = filter.IsDebug() ? INT_MAX : 100;
while (max_logs_to_write-- && message_queue.Pop(entry)) {
write_logs();
}
})} {}
~Impl() {
Entry entry;
entry.final_entry = true;
message_queue.Push(entry);
StopBackendThread();
}
void StopBackendThread() {
Entry stop_entry{};
stop_entry.final_entry = true;
message_queue.Push(stop_entry);
backend_thread.join();
}
@ -135,100 +256,51 @@ private:
};
}
std::mutex writing_mutex;
std::thread backend_thread;
std::vector<std::unique_ptr<Backend>> backends;
MPSCQueue<Entry> message_queue;
void ForEachBackend(auto lambda) {
lambda(static_cast<Backend&>(debugger_backend));
lambda(static_cast<Backend&>(color_console_backend));
lambda(static_cast<Backend&>(file_backend));
}
static void Deleter(Impl* ptr) {
delete ptr;
}
static inline std::unique_ptr<Impl, decltype(&Deleter)> instance{nullptr, Deleter};
Filter filter;
DebuggerBackend debugger_backend{};
ColorConsoleBackend color_console_backend{};
FileBackend file_backend;
std::thread backend_thread;
MPSCQueue<Entry> message_queue{};
std::chrono::steady_clock::time_point time_origin{std::chrono::steady_clock::now()};
};
} // namespace
ConsoleBackend::~ConsoleBackend() = default;
void ConsoleBackend::Write(const Entry& entry) {
PrintMessage(entry);
void Initialize() {
Impl::Initialize();
}
ColorConsoleBackend::~ColorConsoleBackend() = default;
void ColorConsoleBackend::Write(const Entry& entry) {
PrintColoredMessage(entry);
}
FileBackend::FileBackend(const std::filesystem::path& filename) {
auto old_filename = filename;
old_filename += ".old.txt";
// Existence checks are done within the functions themselves.
// We don't particularly care if these succeed or not.
FS::RemoveFile(old_filename);
void(FS::RenameFile(filename, old_filename));
file =
std::make_unique<FS::IOFile>(filename, FS::FileAccessMode::Write, FS::FileType::TextFile);
}
FileBackend::~FileBackend() = default;
void FileBackend::Write(const Entry& entry) {
if (!file->IsOpen()) {
return;
}
using namespace Common::Literals;
// Prevent logs from exceeding a set maximum size in the event that log entries are spammed.
constexpr std::size_t MAX_BYTES_WRITTEN = 100_MiB;
constexpr std::size_t MAX_BYTES_WRITTEN_EXTENDED = 1_GiB;
const bool write_limit_exceeded =
bytes_written > MAX_BYTES_WRITTEN_EXTENDED ||
(bytes_written > MAX_BYTES_WRITTEN && !Settings::values.extended_logging);
// Close the file after the write limit is exceeded.
if (write_limit_exceeded) {
file->Close();
return;
}
bytes_written += file->WriteString(FormatLogMessage(entry).append(1, '\n'));
if (entry.log_level >= Level::Error) {
file->Flush();
}
}
DebuggerBackend::~DebuggerBackend() = default;
void DebuggerBackend::Write(const Entry& entry) {
#ifdef _WIN32
::OutputDebugStringW(UTF8ToUTF16W(FormatLogMessage(entry).append(1, '\n')).c_str());
#endif
void DisableLoggingInTests() {
initialization_in_progress_suppress_logging = true;
}
void SetGlobalFilter(const Filter& filter) {
Impl::Instance().SetGlobalFilter(filter);
}
void AddBackend(std::unique_ptr<Backend> backend) {
Impl::Instance().AddBackend(std::move(backend));
}
void RemoveBackend(std::string_view backend_name) {
Impl::Instance().RemoveBackend(backend_name);
}
Backend* GetBackend(std::string_view backend_name) {
return Impl::Instance().GetBackend(backend_name);
void SetColorConsoleBackendEnabled(bool enabled) {
Impl::Instance().SetColorConsoleBackendEnabled(enabled);
}
void FmtLogMessageImpl(Class log_class, Level log_level, const char* filename,
unsigned int line_num, const char* function, const char* format,
const fmt::format_args& args) {
auto& instance = Impl::Instance();
const auto& filter = instance.GetGlobalFilter();
if (!filter.CheckMessage(log_class, log_level))
return;
instance.PushEntry(log_class, log_level, filename, line_num, function,
if (!initialization_in_progress_suppress_logging) {
Impl::Instance().PushEntry(log_class, log_level, filename, line_num, function,
fmt::vformat(format, args));
}
}
} // namespace Common::Log

111
src/common/logging/backend.h
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@ -5,120 +5,21 @@
#pragma once
#include <filesystem>
#include <memory>
#include <string>
#include <string_view>
#include "common/logging/filter.h"
#include "common/logging/log.h"
namespace Common::FS {
class IOFile;
}
namespace Common::Log {
class Filter;
/**
* Interface for logging backends. As loggers can be created and removed at runtime, this can be
* used by a frontend for adding a custom logging backend as needed
*/
class Backend {
public:
virtual ~Backend() = default;
/// Initializes the logging system. This should be the first thing called in main.
void Initialize();
virtual void SetFilter(const Filter& new_filter) {
filter = new_filter;
}
virtual const char* GetName() const = 0;
virtual void Write(const Entry& entry) = 0;
private:
Filter filter;
};
void DisableLoggingInTests();
/**
* Backend that writes to stderr without any color commands
*/
class ConsoleBackend : public Backend {
public:
~ConsoleBackend() override;
static const char* Name() {
return "console";
}
const char* GetName() const override {
return Name();
}
void Write(const Entry& entry) override;
};
/**
* Backend that writes to stderr and with color
*/
class ColorConsoleBackend : public Backend {
public:
~ColorConsoleBackend() override;
static const char* Name() {
return "color_console";
}
const char* GetName() const override {
return Name();
}
void Write(const Entry& entry) override;
};
/**
* Backend that writes to a file passed into the constructor
*/
class FileBackend : public Backend {
public:
explicit FileBackend(const std::filesystem::path& filename);
~FileBackend() override;
static const char* Name() {
return "file";
}
const char* GetName() const override {
return Name();
}
void Write(const Entry& entry) override;
private:
std::unique_ptr<FS::IOFile> file;
std::size_t bytes_written = 0;
};
/**
* Backend that writes to Visual Studio's output window
*/
class DebuggerBackend : public Backend {
public:
~DebuggerBackend() override;
static const char* Name() {
return "debugger";
}
const char* GetName() const override {
return Name();
}
void Write(const Entry& entry) override;
};
void AddBackend(std::unique_ptr<Backend> backend);
void RemoveBackend(std::string_view backend_name);
Backend* GetBackend(std::string_view backend_name);
/**
* The global filter will prevent any messages from even being processed if they are filtered. Each
* backend can have a filter, but if the level is lower than the global filter, the backend will
* never get the message
* The global filter will prevent any messages from even being processed if they are filtered.
*/
void SetGlobalFilter(const Filter& filter);
void SetColorConsoleBackendEnabled(bool enabled);
} // namespace Common::Log

9
src/core/core.cpp
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@ -84,8 +84,6 @@ FileSys::StorageId GetStorageIdForFrontendSlot(
} // Anonymous namespace
/*static*/ System System::s_instance;
FileSys::VirtualFile GetGameFileFromPath(const FileSys::VirtualFilesystem& vfs,
const std::string& path) {
// To account for split 00+01+etc files.
@ -425,6 +423,13 @@ struct System::Impl {
System::System() : impl{std::make_unique<Impl>(*this)} {}
System::~System() = default;
void System::InitializeGlobalInstance() {
if (s_instance) {
abort();
}
s_instance = std::unique_ptr<System>(new System);
}
CpuManager& System::GetCpuManager() {
return impl->cpu_manager;
}

9
src/core/core.h
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@ -121,8 +121,13 @@ public:
* @returns Reference to the instance of the System singleton class.
*/
[[deprecated("Use of the global system instance is deprecated")]] static System& GetInstance() {
return s_instance;
if (!s_instance) {
abort();
}
return *s_instance;
}
static void InitializeGlobalInstance();
/// Enumeration representing the return values of the System Initialize and Load process.
enum class ResultStatus : u32 {
@ -393,7 +398,7 @@ private:
struct Impl;
std::unique_ptr<Impl> impl;
static System s_instance;
inline static std::unique_ptr<System> s_instance{};
};
} // namespace Core

2
src/tests/common/param_package.cpp
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@ -4,11 +4,13 @@
#include <catch2/catch.hpp>
#include <math.h>
#include "common/logging/backend.h"
#include "common/param_package.h"
namespace Common {
TEST_CASE("ParamPackage", "[common]") {
Common::Log::DisableLoggingInTests();
ParamPackage original{
{"abc", "xyz"},
{"def", "42"},

11
src/yuzu/debugger/console.cpp
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@ -21,6 +21,7 @@ void ToggleConsole() {
console_shown = UISettings::values.show_console.GetValue();
}
using namespace Common::Log;
#if defined(_WIN32) && !defined(_DEBUG)
FILE* temp;
if (UISettings::values.show_console) {
@ -29,24 +30,20 @@ void ToggleConsole() {
freopen_s(&temp, "CONIN$", "r", stdin);
freopen_s(&temp, "CONOUT$", "w", stdout);
freopen_s(&temp, "CONOUT$", "w", stderr);
Common::Log::AddBackend(std::make_unique<Common::Log::ColorConsoleBackend>());
SetColorConsoleBackendEnabled(true);
}
} else {
if (FreeConsole()) {
// In order to close the console, we have to also detach the streams on it.
// Just redirect them to NUL if there is no console window
Common::Log::RemoveBackend(Common::Log::ColorConsoleBackend::Name());
SetColorConsoleBackendEnabled(false);
freopen_s(&temp, "NUL", "r", stdin);
freopen_s(&temp, "NUL", "w", stdout);
freopen_s(&temp, "NUL", "w", stderr);
}
}
#else
if (UISettings::values.show_console) {
Common::Log::AddBackend(std::make_unique<Common::Log::ColorConsoleBackend>());
} else {
Common::Log::RemoveBackend(Common::Log::ColorConsoleBackend::Name());
}
SetColorConsoleBackendEnabled(UISettings::values.show_console.GetValue());
#endif
}
} // namespace Debugger

19
src/yuzu/main.cpp
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@ -175,21 +175,6 @@ void GMainWindow::ShowTelemetryCallout() {
const int GMainWindow::max_recent_files_item;
static void InitializeLogging() {
using namespace Common;
Log::Filter log_filter;
log_filter.ParseFilterString(Settings::values.log_filter.GetValue());
Log::SetGlobalFilter(log_filter);
const auto log_dir = FS::GetYuzuPath(FS::YuzuPath::LogDir);
void(FS::CreateDir(log_dir));
Log::AddBackend(std::make_unique<Log::FileBackend>(log_dir / LOG_FILE));
#ifdef _WIN32
Log::AddBackend(std::make_unique<Log::DebuggerBackend>());
#endif
}
static void RemoveCachedContents() {
const auto cache_dir = Common::FS::GetYuzuPath(Common::FS::YuzuPath::CacheDir);
const auto offline_fonts = cache_dir / "fonts";
@ -207,8 +192,6 @@ GMainWindow::GMainWindow()
: input_subsystem{std::make_shared<InputCommon::InputSubsystem>()},
config{std::make_unique<Config>()}, vfs{std::make_shared<FileSys::RealVfsFilesystem>()},
provider{std::make_unique<FileSys::ManualContentProvider>()} {
InitializeLogging();
LoadTranslation();
setAcceptDrops(true);
@ -3398,6 +3381,7 @@ void GMainWindow::SetDiscordEnabled([[maybe_unused]] bool state) {
#endif
int main(int argc, char* argv[]) {
Common::Log::Initialize();
Common::DetachedTasks detached_tasks;
MicroProfileOnThreadCreate("Frontend");
SCOPE_EXIT({ MicroProfileShutdown(); });
@ -3437,6 +3421,7 @@ int main(int argc, char* argv[]) {
// generating shaders
setlocale(LC_ALL, "C");
Core::System::InitializeGlobalInstance();
GMainWindow main_window;
// After settings have been loaded by GMainWindow, apply the filter
main_window.show();

22
src/yuzu_cmd/yuzu.cpp
View File

@ -74,31 +74,14 @@ static void PrintVersion() {
std::cout << "yuzu " << Common::g_scm_branch << " " << Common::g_scm_desc << std::endl;
}
static void InitializeLogging() {
using namespace Common;
Log::Filter log_filter(Log::Level::Debug);
log_filter.ParseFilterString(static_cast<std::string>(Settings::values.log_filter));
Log::SetGlobalFilter(log_filter);
Log::AddBackend(std::make_unique<Log::ColorConsoleBackend>());
const auto& log_dir = FS::GetYuzuPath(FS::YuzuPath::LogDir);
void(FS::CreateDir(log_dir));
Log::AddBackend(std::make_unique<Log::FileBackend>(log_dir / LOG_FILE));
#ifdef _WIN32
Log::AddBackend(std::make_unique<Log::DebuggerBackend>());
#endif
}
/// Application entry point
int main(int argc, char** argv) {
Common::Log::Initialize();
Common::Log::SetColorConsoleBackendEnabled(true);
Common::DetachedTasks detached_tasks;
Config config;
int option_index = 0;
InitializeLogging();
#ifdef _WIN32
int argc_w;
auto argv_w = CommandLineToArgvW(GetCommandLineW(), &argc_w);
@ -163,6 +146,7 @@ int main(int argc, char** argv) {
return -1;
}
Core::System::InitializeGlobalInstance();
auto& system{Core::System::GetInstance()};
InputCommon::InputSubsystem input_subsystem;