107 lines
3.9 KiB
C++
107 lines
3.9 KiB
C++
// Copyright 2022 The Pigweed Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License"); you may not
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// use this file except in compliance with the License. You may obtain a copy of
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// the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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// License for the specific language governing permissions and limitations under
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// the License.
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#include <array>
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#include <cstddef>
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#include <mutex>
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#include "pw_bytes/span.h"
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#include "pw_chrono/system_clock.h"
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#include "pw_log/proto_utils.h"
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#include "pw_log_string/handler.h"
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#include "pw_log_tokenized/metadata.h"
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#include "pw_multisink/multisink.h"
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#include "pw_result/result.h"
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#include "pw_string/string_builder.h"
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#include "pw_sync/interrupt_spin_lock.h"
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#include "pw_sync/lock_annotations.h"
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#include "pw_system/config.h"
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#include "pw_system_private/log.h"
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#include "pw_tokenizer/tokenize_to_global_handler_with_payload.h"
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namespace pw::system {
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namespace {
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// Buffer used to encode each log entry before saving into log buffer.
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sync::InterruptSpinLock log_encode_lock;
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std::array<std::byte, PW_SYSTEM_MAX_LOG_ENTRY_SIZE> log_encode_buffer
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PW_GUARDED_BY(log_encode_lock);
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// String-only logs may need to be formatted first. This buffer is required
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// so the format string may be passed to the proto log encode.
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std::array<std::byte, PW_SYSTEM_MAX_LOG_ENTRY_SIZE> log_format_buffer
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PW_GUARDED_BY(log_encode_lock);
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const int64_t boot_time_count =
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pw::chrono::SystemClock::now().time_since_epoch().count();
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} // namespace
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// Provides time since boot in units defined by the target's pw_chrono backend.
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int64_t GetTimestamp() {
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return pw::chrono::SystemClock::now().time_since_epoch().count() -
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boot_time_count;
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}
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// Implementation for tokenized log handling. This will be optimized out for
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// devices that only use string logging.
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extern "C" void pw_tokenizer_HandleEncodedMessageWithPayload(
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pw_tokenizer_Payload payload, const uint8_t message[], size_t size_bytes) {
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log_tokenized::Metadata metadata = payload;
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const int64_t timestamp = GetTimestamp();
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std::lock_guard lock(log_encode_lock);
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Result<ConstByteSpan> encoded_log_result = log::EncodeTokenizedLog(
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metadata, message, size_bytes, timestamp, log_encode_buffer);
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if (!encoded_log_result.ok()) {
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GetMultiSink().HandleDropped();
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return;
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}
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GetMultiSink().HandleEntry(encoded_log_result.value());
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}
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// Implementation for string log handling. This will be optimized out for
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// devices that only use tokenized logging.
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extern "C" void pw_log_string_HandleMessageVaList(int level,
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unsigned int flags,
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const char* module_name,
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const char* file_name,
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int line_number,
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const char* message,
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va_list args) {
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const int64_t timestamp = GetTimestamp();
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std::lock_guard lock(log_encode_lock);
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StringBuilder message_builder(log_format_buffer);
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message_builder.FormatVaList(message, args);
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Result<ConstByteSpan> encoded_log_result =
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log::EncodeLog(level,
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flags,
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module_name,
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/*thread_name=*/{},
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file_name,
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line_number,
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timestamp,
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message_builder.view(),
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log_encode_buffer);
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if (!encoded_log_result.ok()) {
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GetMultiSink().HandleDropped();
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return;
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}
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GetMultiSink().HandleEntry(encoded_log_result.value());
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}
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} // namespace pw::system
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