New logging system
Yuri Kunde Schlesner
parent
04b1f2936c
commit
616d874443
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// Copyright 2014 Citra Emulator Project
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// Licensed under GPLv2+
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// Refer to the license.txt file included.
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#pragma once
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#include <array>
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#include <condition_variable>
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#include <cstdint>
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#include <mutex>
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#include <thread>
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#include "common/common.h" // for NonCopyable
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#include "common/log.h" // for _dbg_assert_
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namespace Common {
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/**
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* A MPMC (Multiple-Producer Multiple-Consumer) concurrent ring buffer. This data structure permits
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* multiple threads to push and pop from a queue of bounded size.
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*/
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template <typename T, size_t ArraySize>
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class ConcurrentRingBuffer : private NonCopyable {
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public:
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/// Value returned by the popping functions when the queue has been closed.
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static const size_t QUEUE_CLOSED = -1;
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ConcurrentRingBuffer() {}
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~ConcurrentRingBuffer() {
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// If for whatever reason the queue wasn't completely drained, destroy the left over items.
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for (size_t i = reader_index, end = writer_index; i != end; i = (i + 1) % ArraySize) {
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Data()[i].~T();
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}
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}
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/**
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* Pushes a value to the queue. If the queue is full, this method will block. Does nothing if
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* the queue is closed.
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*/
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void Push(T val) {
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std::unique_lock<std::mutex> lock(mutex);
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if (closed) {
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return;
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}
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// If the buffer is full, wait
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writer.wait(lock, [&]{
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return (writer_index + 1) % ArraySize != reader_index;
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});
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T* item = &Data()[writer_index];
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new (item) T(std::move(val));
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writer_index = (writer_index + 1) % ArraySize;
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// Wake up waiting readers
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lock.unlock();
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reader.notify_one();
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}
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/**
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* Pops up to `dest_len` items from the queue, storing them in `dest`. This function will not
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* block, and might return 0 values if there are no elements in the queue when it is called.
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*
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* @return The number of elements stored in `dest`. If the queue has been closed, returns
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* `QUEUE_CLOSED`.
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*/
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size_t Pop(T* dest, size_t dest_len) {
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std::unique_lock<std::mutex> lock(mutex);
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if (closed && !CanRead()) {
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return QUEUE_CLOSED;
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}
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return PopInternal(dest, dest_len);
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}
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/**
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* Pops up to `dest_len` items from the queue, storing them in `dest`. This function will block
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* if there are no elements in the queue when it is called.
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*
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* @return The number of elements stored in `dest`. If the queue has been closed, returns
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* `QUEUE_CLOSED`.
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*/
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size_t BlockingPop(T* dest, size_t dest_len) {
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std::unique_lock<std::mutex> lock(mutex);
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if (closed && !CanRead()) {
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return QUEUE_CLOSED;
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}
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while (!CanRead()) {
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reader.wait(lock);
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if (closed && !CanRead()) {
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return QUEUE_CLOSED;
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}
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}
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_dbg_assert_(Common, CanRead());
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return PopInternal(dest, dest_len);
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}
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/**
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* Closes the queue. After calling this method, `Push` operations won't have any effect, and
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* `PopMany` and `PopManyBlock` will start returning `QUEUE_CLOSED`. This is intended to allow
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* a graceful shutdown of all consumers.
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*/
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void Close() {
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std::unique_lock<std::mutex> lock(mutex);
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closed = true;
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// We need to wake up any reader that are waiting for an item that will never come.
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lock.unlock();
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reader.notify_all();
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}
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/// Returns true if `Close()` has been called.
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bool IsClosed() const {
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return closed;
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}
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private:
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size_t PopInternal(T* dest, size_t dest_len) {
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size_t output_count = 0;
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while (output_count < dest_len && CanRead()) {
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_dbg_assert_(Common, CanRead());
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T* item = &Data()[reader_index];
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T out_val = std::move(*item);
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item->~T();
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size_t prev_index = (reader_index + ArraySize - 1) % ArraySize;
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reader_index = (reader_index + 1) % ArraySize;
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if (writer_index == prev_index) {
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writer.notify_one();
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}
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dest[output_count++] = std::move(out_val);
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}
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return output_count;
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}
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bool CanRead() const {
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return reader_index != writer_index;
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}
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T* Data() {
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return static_cast<T*>(static_cast<void*>(&storage));
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}
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/// Storage for entries
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typename std::aligned_storage<ArraySize * sizeof(T),
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std::alignment_of<T>::value>::type storage;
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/// Data is valid in the half-open interval [reader, writer). If they are `QUEUE_CLOSED` then the
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/// queue has been closed.
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size_t writer_index = 0, reader_index = 0;
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// True if the queue has been closed.
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bool closed = false;
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/// Mutex that protects the entire data structure.
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std::mutex mutex;
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/// Signaling wakes up reader which is waiting for storage to be non-empty.
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std::condition_variable reader;
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/// Signaling wakes up writer which is waiting for storage to be non-full.
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std::condition_variable writer;
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};
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} // namespace
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@ -0,0 +1,151 @@
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// Copyright 2014 Citra Emulator Project
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// Licensed under GPLv2+
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// Refer to the license.txt file included.
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#include <algorithm>
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#include "common/log.h" // For _dbg_assert_
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#include "common/logging/backend.h"
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#include "common/logging/log.h"
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#include "common/logging/text_formatter.h"
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namespace Log {
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static std::shared_ptr<Logger> global_logger;
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/// Macro listing all log classes. Code should define CLS and SUB as desired before invoking this.
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#define ALL_LOG_CLASSES() \
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CLS(Log) \
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CLS(Common) \
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SUB(Common, Filesystem) \
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SUB(Common, Memory) \
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CLS(Core) \
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SUB(Core, ARM11) \
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CLS(Config) \
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CLS(Debug) \
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SUB(Debug, Emulated) \
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SUB(Debug, GPU) \
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SUB(Debug, Breakpoint) \
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CLS(Kernel) \
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SUB(Kernel, SVC) \
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CLS(Service) \
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SUB(Service, SRV) \
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SUB(Service, FS) \
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SUB(Service, APT) \
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SUB(Service, GSP) \
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SUB(Service, AC) \
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SUB(Service, PTM) \
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SUB(Service, CFG) \
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SUB(Service, DSP) \
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SUB(Service, HID) \
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CLS(HW) \
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SUB(HW, Memory) \
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SUB(HW, GPU) \
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CLS(Frontend) \
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CLS(Render) \
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SUB(Render, Software) \
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SUB(Render, OpenGL) \
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CLS(Loader)
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Logger::Logger() {
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// Register logging classes so that they can be queried at runtime
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size_t parent_class;
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all_classes.reserve((size_t)Class::Count);
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#define CLS(x) \
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all_classes.push_back(Class::x); \
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parent_class = all_classes.size() - 1;
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#define SUB(x, y) \
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all_classes.push_back(Class::x##_##y); \
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all_classes[parent_class].num_children += 1;
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ALL_LOG_CLASSES()
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#undef CLS
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#undef SUB
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// Ensures that ALL_LOG_CLASSES isn't missing any entries.
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_dbg_assert_(Log, all_classes.size() == (size_t)Class::Count);
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}
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// GetClassName is a macro defined by Windows.h, grrr...
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const char* Logger::GetLogClassName(Class log_class) {
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switch (log_class) {
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#define CLS(x) case Class::x: return #x;
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#define SUB(x, y) case Class::x##_##y: return #x "." #y;
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ALL_LOG_CLASSES()
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#undef CLS
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#undef SUB
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}
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return "Unknown";
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}
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const char* Logger::GetLevelName(Level log_level) {
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#define LVL(x) case Level::x: return #x
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switch (log_level) {
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LVL(Trace);
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LVL(Debug);
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LVL(Info);
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LVL(Warning);
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LVL(Error);
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LVL(Critical);
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}
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return "Unknown";
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#undef LVL
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}
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void Logger::LogMessage(Entry entry) {
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ring_buffer.Push(std::move(entry));
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}
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size_t Logger::GetEntries(Entry* out_buffer, size_t buffer_len) {
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return ring_buffer.BlockingPop(out_buffer, buffer_len);
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}
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std::shared_ptr<Logger> InitGlobalLogger() {
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global_logger = std::make_shared<Logger>();
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return global_logger;
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}
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Entry CreateEntry(Class log_class, Level log_level,
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const char* filename, unsigned int line_nr, const char* function,
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const char* format, va_list args) {
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using std::chrono::steady_clock;
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using std::chrono::duration_cast;
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static steady_clock::time_point time_origin = steady_clock::now();
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std::array<char, 4 * 1024> formatting_buffer;
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Entry entry;
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entry.timestamp = duration_cast<std::chrono::microseconds>(steady_clock::now() - time_origin);
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entry.log_class = log_class;
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entry.log_level = log_level;
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snprintf(formatting_buffer.data(), formatting_buffer.size(), "%s:%s:%u", filename, function, line_nr);
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entry.location = std::string(formatting_buffer.data());
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vsnprintf(formatting_buffer.data(), formatting_buffer.size(), format, args);
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entry.message = std::string(formatting_buffer.data());
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return std::move(entry);
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}
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void LogMessage(Class log_class, Level log_level,
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const char* filename, unsigned int line_nr, const char* function,
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const char* format, ...) {
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va_list args;
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va_start(args, format);
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Entry entry = CreateEntry(log_class, log_level,
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filename, line_nr, function, format, args);
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va_end(args);
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if (global_logger != nullptr && !global_logger->IsClosed()) {
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global_logger->LogMessage(std::move(entry));
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} else {
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// Fall back to directly printing to stderr
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PrintMessage(entry);
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}
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}
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}
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@ -0,0 +1,134 @@
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// Copyright 2014 Citra Emulator Project
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// Licensed under GPLv2+
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// Refer to the license.txt file included.
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#pragma once
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#include <cstdarg>
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#include <memory>
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#include <vector>
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#include "common/concurrent_ring_buffer.h"
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#include "common/logging/log.h"
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namespace Log {
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/**
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* A log entry. Log entries are store in a structured format to permit more varied output
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* formatting on different frontends, as well as facilitating filtering and aggregation.
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*/
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struct Entry {
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std::chrono::microseconds timestamp;
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Class log_class;
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Level log_level;
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std::string location;
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std::string message;
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Entry() = default;
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// TODO(yuriks) Use defaulted move constructors once MSVC supports them
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#define MOVE(member) member(std::move(o.member))
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Entry(Entry&& o)
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: MOVE(timestamp), MOVE(log_class), MOVE(log_level),
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MOVE(location), MOVE(message)
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{}
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#undef MOVE
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Entry& operator=(const Entry&& o) {
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#define MOVE(member) member = std::move(o.member)
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MOVE(timestamp);
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MOVE(log_class);
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MOVE(log_level);
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MOVE(location);
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MOVE(message);
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#undef MOVE
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return *this;
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}
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};
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struct ClassInfo {
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Class log_class;
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/**
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* Total number of (direct or indirect) sub classes this class has. If any, they follow in
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* sequence after this class in the class list.
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*/
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unsigned int num_children = 0;
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ClassInfo(Class log_class) : log_class(log_class) {}
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};
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/**
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* Logging management class. This class has the dual purpose of acting as an exchange point between
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* the logging clients and the log outputter, as well as containing reflection info about available
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* log classes.
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*/
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class Logger {
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private:
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using Buffer = Common::ConcurrentRingBuffer<Entry, 16 * 1024 / sizeof(Entry)>;
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public:
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static const size_t QUEUE_CLOSED = Buffer::QUEUE_CLOSED;
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Logger();
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/**
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* Returns a list of all vector classes and subclasses. The sequence returned is a pre-order of
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* classes and subclasses, which together with the `num_children` field in ClassInfo, allows
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* you to recover the hierarchy.
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*/
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const std::vector<ClassInfo>& GetClasses() const { return all_classes; }
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/**
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* Returns the name of the passed log class as a C-string. Subclasses are separated by periods
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* instead of underscores as in the enumeration.
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*/
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static const char* GetLogClassName(Class log_class);
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/**
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* Returns the name of the passed log level as a C-string.
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*/
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static const char* GetLevelName(Level log_level);
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/**
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* Appends a messages to the log buffer.
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* @note This function is thread safe.
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*/
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void LogMessage(Entry entry);
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/**
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* Retrieves a batch of messages from the log buffer, blocking until they are available.
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* @note This function is thread safe.
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*
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* @param out_buffer Destination buffer that will receive the log entries.
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* @param buffer_len The maximum size of `out_buffer`.
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* @return The number of entries stored. In case the logger is shutting down, `QUEUE_CLOSED` is
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* returned, no entries are stored and the logger should shutdown.
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*/
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size_t GetEntries(Entry* out_buffer, size_t buffer_len);
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/**
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* Initiates a shutdown of the logger. This will indicate to log output clients that they
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* should shutdown.
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*/
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void Close() { ring_buffer.Close(); }
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/**
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* Returns true if Close() has already been called on the Logger.
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*/
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bool IsClosed() const { return ring_buffer.IsClosed(); }
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private:
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Buffer ring_buffer;
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std::vector<ClassInfo> all_classes;
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};
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/// Creates a log entry by formatting the given source location, and message.
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Entry CreateEntry(Class log_class, Level log_level,
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const char* filename, unsigned int line_nr, const char* function,
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const char* format, va_list args);
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/// Initializes the default Logger.
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std::shared_ptr<Logger> InitGlobalLogger();
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}
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@ -0,0 +1,115 @@
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// Copyright 2014 Citra Emulator Project
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// Licensed under GPLv2+
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// Refer to the license.txt file included.
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#pragma once
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#include <cassert>
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#include <chrono>
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#include <string>
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#include "common/common_types.h"
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namespace Log {
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/// Specifies the severity or level of detail of the log message.
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enum class Level : u8 {
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Trace, ///< Extremely detailed and repetitive debugging information that is likely to
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/// pollute logs.
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Debug, ///< Less detailed debugging information.
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Info, ///< Status information from important points during execution.
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Warning, ///< Minor or potential problems found during execution of a task.
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Error, ///< Major problems found during execution of a task that prevent it from being
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/// completed.
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Critical, ///< Major problems during execution that threathen the stability of the entire
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/// application.
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Count ///< Total number of logging levels
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};
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typedef u8 ClassType;
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/**
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* Specifies the sub-system that generated the log message.
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*
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* @note If you add a new entry here, also add a corresponding one to `ALL_LOG_CLASSES` in log.cpp.
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*/
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enum class Class : ClassType {
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Log, ///< Messages about the log system itself
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Common, ///< Library routines
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Common_Filesystem, ///< Filesystem interface library
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Common_Memory, ///< Memory mapping and management functions
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Core, ///< LLE emulation core
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Core_ARM11, ///< ARM11 CPU core
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Config, ///< Emulator configuration (including commandline)
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Debug, ///< Debugging tools
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Debug_Emulated, ///< Debug messages from the emulated programs
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Debug_GPU, ///< GPU debugging tools
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Debug_Breakpoint, ///< Logging breakpoints and watchpoints
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Kernel, ///< The HLE implementation of the CTR kernel
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Kernel_SVC, ///< Kernel system calls
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Service, ///< HLE implementation of system services. Each major service
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/// should have its own subclass.
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Service_SRV, ///< The SRV (Service Directory) implementation
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Service_FS, ///< The FS (Filesystem) service implementation
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Service_APT, ///< The APT (Applets) service
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Service_GSP, ///< The GSP (GPU control) service
|
||||
Service_AC, ///< The AC (WiFi status) service
|
||||
Service_PTM, ///< The PTM (Power status & misc.) service
|
||||
Service_CFG, ///< The CFG (Configuration) service
|
||||
Service_DSP, ///< The DSP (DSP control) service
|
||||
Service_HID, ///< The HID (User input) service
|
||||
HW, ///< Low-level hardware emulation
|
||||
HW_Memory, ///< Memory-map and address translation
|
||||
HW_GPU, ///< GPU control emulation
|
||||
Frontend, ///< Emulator UI
|
||||
Render, ///< Emulator video output and hardware acceleration
|
||||
Render_Software, ///< Software renderer backend
|
||||
Render_OpenGL, ///< OpenGL backend
|
||||
Loader, ///< ROM loader
|
||||
|
||||
Count ///< Total number of logging classes
|
||||
};
|
||||
|
||||
/**
|
||||
* Level below which messages are simply discarded without buffering regardless of the display
|
||||
* settings.
|
||||
*/
|
||||
const Level MINIMUM_LEVEL =
|
||||
#ifdef _DEBUG
|
||||
Level::Trace;
|
||||
#else
|
||||
Level::Debug;
|
||||
#endif
|
||||
|
||||
/**
|
||||
* Logs a message to the global logger. This proxy exists to avoid exposing the details of the
|
||||
* Logger class, including the ConcurrentRingBuffer template, to all files that desire to log
|
||||
* messages, reducing unecessary recompilations.
|
||||
*/
|
||||
void LogMessage(Class log_class, Level log_level,
|
||||
const char* filename, unsigned int line_nr, const char* function,
|
||||
#ifdef _MSC_VER
|
||||
_Printf_format_string_
|
||||
#endif
|
||||
const char* format, ...)
|
||||
#ifdef __GNUC__
|
||||
__attribute__((format(printf, 6, 7)))
|
||||
#endif
|
||||
;
|
||||
|
||||
} // namespace Log
|
||||
|
||||
#define LOG_GENERIC(log_class, log_level, ...) \
|
||||
do { \
|
||||
if (::Log::Level::log_level >= ::Log::MINIMUM_LEVEL) \
|
||||
::Log::LogMessage(::Log::Class::log_class, ::Log::Level::log_level, \
|
||||
__FILE__, __LINE__, __func__, __VA_ARGS__); \
|
||||
} while (0)
|
||||
|
||||
#define LOG_TRACE( log_class, ...) LOG_GENERIC(log_class, Trace, __VA_ARGS__)
|
||||
#define LOG_DEBUG( log_class, ...) LOG_GENERIC(log_class, Debug, __VA_ARGS__)
|
||||
#define LOG_INFO( log_class, ...) LOG_GENERIC(log_class, Info, __VA_ARGS__)
|
||||
#define LOG_WARNING( log_class, ...) LOG_GENERIC(log_class, Warning, __VA_ARGS__)
|
||||
#define LOG_ERROR( log_class, ...) LOG_GENERIC(log_class, Error, __VA_ARGS__)
|
||||
#define LOG_CRITICAL(log_class, ...) LOG_GENERIC(log_class, Critical, __VA_ARGS__)
|
||||
@ -0,0 +1,47 @@
|
||||
// Copyright 2014 Citra Emulator Project
|
||||
// Licensed under GPLv2+
|
||||
// Refer to the license.txt file included.
|
||||
|
||||
#include <array>
|
||||
#include <cstdio>
|
||||
|
||||
#include "common/logging/backend.h"
|
||||
#include "common/logging/log.h"
|
||||
#include "common/logging/text_formatter.h"
|
||||
|
||||
namespace Log {
|
||||
|
||||
void FormatLogMessage(const Entry& entry, char* out_text, size_t text_len) {
|
||||
unsigned int time_seconds = static_cast<unsigned int>(entry.timestamp.count() / 1000000);
|
||||
unsigned int time_fractional = static_cast<unsigned int>(entry.timestamp.count() % 1000000);
|
||||
|
||||
const char* class_name = Logger::GetLogClassName(entry.log_class);
|
||||
const char* level_name = Logger::GetLevelName(entry.log_level);
|
||||
|
||||
snprintf(out_text, text_len, "[%4u.%06u] %s <%s> %s: %s",
|
||||
time_seconds, time_fractional, class_name, level_name,
|
||||
entry.location.c_str(), entry.message.c_str());
|
||||
}
|
||||
|
||||
void PrintMessage(const Entry& entry) {
|
||||
std::array<char, 4 * 1024> format_buffer;
|
||||
FormatLogMessage(entry, format_buffer.data(), format_buffer.size());
|
||||
fputs(format_buffer.data(), stderr);
|
||||
fputc('\n', stderr);
|
||||
}
|
||||
|
||||
void TextLoggingLoop(std::shared_ptr<Logger> logger) {
|
||||
std::array<Entry, 256> entry_buffer;
|
||||
|
||||
while (true) {
|
||||
size_t num_entries = logger->GetEntries(entry_buffer.data(), entry_buffer.size());
|
||||
if (num_entries == Logger::QUEUE_CLOSED) {
|
||||
break;
|
||||
}
|
||||
for (size_t i = 0; i < num_entries; ++i) {
|
||||
PrintMessage(entry_buffer[i]);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
@ -0,0 +1,26 @@
|
||||
// Copyright 2014 Citra Emulator Project
|
||||
// Licensed under GPLv2+
|
||||
// Refer to the license.txt file included.
|
||||
|
||||
#pragma once
|
||||
|
||||
#include <cstddef>
|
||||
#include <memory>
|
||||
|
||||
namespace Log {
|
||||
|
||||
class Logger;
|
||||
struct Entry;
|
||||
|
||||
/// Formats a log entry into the provided text buffer.
|
||||
void FormatLogMessage(const Entry& entry, char* out_text, size_t text_len);
|
||||
/// Formats and prints a log entry to stderr.
|
||||
void PrintMessage(const Entry& entry);
|
||||
|
||||
/**
|
||||
* Logging loop that repeatedly reads messages from the provided logger and prints them to the
|
||||
* console. It is the baseline barebones log outputter.
|
||||
*/
|
||||
void TextLoggingLoop(std::shared_ptr<Logger> logger);
|
||||
|
||||
}
|
||||
Loading…
Reference in New Issue