mirror of
https://github.com/FreeRTOS/FreeRTOS-Kernel.git
synced 2025-10-29 00:36:16 -04:00
544 lines
21 KiB
C
544 lines
21 KiB
C
/*
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* FreeRTOS V202212.00
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* Copyright (C) 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of
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* this software and associated documentation files (the "Software"), to deal in
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* the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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* the Software, and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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* https://www.FreeRTOS.org
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* https://github.com/FreeRTOS
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*
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*/
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/*
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* Logging utility that allows FreeRTOS tasks to log to a UDP port, stdout, and
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* disk file without making any Win32 system calls themselves.
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*
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* Messages logged to a UDP port are sent directly (using FreeRTOS+TCP), but as
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* FreeRTOS tasks cannot make Win32 system calls messages sent to stdout or a
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* disk file are sent via a stream buffer to a Win32 thread which then performs
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* the actual output.
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*/
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/* Standard includes. */
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#include <stdio.h>
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#include <stdint.h>
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#include <stdarg.h>
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#include <io.h>
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#include <ctype.h>
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/* FreeRTOS includes. */
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#include "FreeRTOS.h"
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#include "task.h"
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/* FreeRTOS+TCP includes. */
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#include "FreeRTOS_IP.h"
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#include "FreeRTOS_Sockets.h"
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#include "FreeRTOS_Stream_Buffer.h"
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/* Demo includes. */
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#include "logging.h"
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/*-----------------------------------------------------------*/
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/* The maximum size to which the log file may grow, before being renamed
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* to .ful. */
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#define dlLOGGING_FILE_SIZE ( 40ul * 1024ul * 1024ul )
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/* Dimensions the arrays into which print messages are created. */
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#define dlMAX_PRINT_STRING_LENGTH 255
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/* The size of the stream buffer used to pass messages from FreeRTOS tasks to
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* the Win32 thread that is responsible for making any Win32 system calls that are
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* necessary for the selected logging method. */
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#define dlLOGGING_STREAM_BUFFER_SIZE 32768
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/* A block time of zero simply means don't block. */
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#define dlDONT_BLOCK 0
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/*-----------------------------------------------------------*/
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/*
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* Called from vLoggingInit() to start a new disk log file.
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*/
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static void prvFileLoggingInit( void );
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/*
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* Attempt to write a message to the file.
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*/
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static void prvLogToFile( const char * pcMessage,
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size_t xLength );
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/*
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* Simply close the logging file, if it is open.
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*/
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static void prvFileClose( void );
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/*
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* Before the scheduler is started this function is called directly. After the
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* scheduler has started it is called from the Windows thread dedicated to
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* outputting log messages. Only the windows thread actually performs the
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* writing so as not to disrupt the simulation by making Windows system calls
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* from FreeRTOS tasks.
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*/
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static void prvLoggingFlushBuffer( void );
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/*
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* The windows thread that performs the actual writing of messages that require
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* Win32 system calls. Only the windows thread can make system calls so as not
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* to disrupt the simulation by making Windows calls from FreeRTOS tasks.
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*/
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static DWORD WINAPI prvWin32LoggingThread( void * pvParam );
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/*
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* Creates the socket to which UDP messages are sent. This function is not
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* called directly to prevent the print socket being created from within the IP
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* task - which could result in a deadlock. Instead the function call is
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* deferred to run in the RTOS daemon task - hence it prototype.
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*/
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static void prvCreatePrintSocket( void * pvParameter1,
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uint32_t ulParameter2 );
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/*-----------------------------------------------------------*/
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/* Windows event used to wake the Win32 thread which performs any logging that
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* needs Win32 system calls. */
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static void * pvLoggingThreadEvent = NULL;
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/* Stores the selected logging targets passed in as parameters to the
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* vLoggingInit() function. */
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BaseType_t xStdoutLoggingUsed = pdFALSE, xDiskFileLoggingUsed = pdFALSE, xUDPLoggingUsed = pdFALSE;
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/* Circular buffer used to pass messages from the FreeRTOS tasks to the Win32
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* thread that is responsible for making Win32 calls (when stdout or a disk log is
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* used). */
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static StreamBuffer_t * xLogStreamBuffer = NULL;
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/* Handle to the file used for logging. This is left open while there are
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* messages waiting to be logged, then closed again in between logs. */
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static FILE * pxLoggingFileHandle = NULL;
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/* When true prints are performed directly. After start up xDirectPrint is set
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* to pdFALSE - at which time prints that require Win32 system calls are done by
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* the Win32 thread responsible for logging. */
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BaseType_t xDirectPrint = pdTRUE;
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/* File names for the in use and complete (full) log files. */
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static const char * pcLogFileName = "RTOSDemo.log";
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static const char * pcFullLogFileName = "RTOSDemo.ful";
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/* As an optimization, the current file size is kept in a variable. */
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static size_t ulSizeOfLoggingFile = 0ul;
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/* The UDP socket and address on/to which print messages are sent. */
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Socket_t xPrintSocket = FREERTOS_INVALID_SOCKET;
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struct freertos_sockaddr xPrintUDPAddress;
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/*-----------------------------------------------------------*/
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void vLoggingInit( BaseType_t xLogToStdout,
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BaseType_t xLogToFile,
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BaseType_t xLogToUDP,
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uint32_t ulRemoteIPAddress,
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uint16_t usRemotePort )
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{
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/* Can only be called before the scheduler has started. */
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configASSERT( xTaskGetSchedulerState() == taskSCHEDULER_NOT_STARTED );
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#if ( ( ipconfigHAS_DEBUG_PRINTF == 1 ) || ( ipconfigHAS_PRINTF == 1 ) )
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{
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HANDLE Win32Thread;
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/* Record which output methods are to be used. */
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xStdoutLoggingUsed = xLogToStdout;
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xDiskFileLoggingUsed = xLogToFile;
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xUDPLoggingUsed = xLogToUDP;
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/* If a disk file is used then initialize it now. */
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if( xDiskFileLoggingUsed != pdFALSE )
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{
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prvFileLoggingInit();
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}
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/* If UDP logging is used then store the address to which the log data
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* will be sent - but don't create the socket yet because the network is
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* not initialized. */
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if( xUDPLoggingUsed != pdFALSE )
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{
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/* Set the address to which the print messages are sent. */
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xPrintUDPAddress.sin_port = FreeRTOS_htons( usRemotePort );
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xPrintUDPAddress.sin_addr = ulRemoteIPAddress;
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}
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/* If a disk file or stdout are to be used then Win32 system calls will
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* have to be made. Such system calls cannot be made from FreeRTOS tasks
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* so create a stream buffer to pass the messages to a Win32 thread, then
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* create the thread itself, along with a Win32 event that can be used to
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* unblock the thread. */
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if( ( xStdoutLoggingUsed != pdFALSE ) || ( xDiskFileLoggingUsed != pdFALSE ) )
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{
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/* Create the buffer. */
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xLogStreamBuffer = ( StreamBuffer_t * ) malloc( sizeof( *xLogStreamBuffer ) - sizeof( xLogStreamBuffer->ucArray ) + dlLOGGING_STREAM_BUFFER_SIZE + 1 );
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configASSERT( xLogStreamBuffer );
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memset( xLogStreamBuffer, '\0', sizeof( *xLogStreamBuffer ) - sizeof( xLogStreamBuffer->ucArray ) );
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xLogStreamBuffer->LENGTH = dlLOGGING_STREAM_BUFFER_SIZE + 1;
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/* Create the Windows event. */
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pvLoggingThreadEvent = CreateEvent( NULL, FALSE, TRUE, "StdoutLoggingEvent" );
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/* Create the thread itself. */
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Win32Thread = CreateThread(
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NULL, /* Pointer to thread security attributes. */
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0, /* Initial thread stack size, in bytes. */
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prvWin32LoggingThread, /* Pointer to thread function. */
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NULL, /* Argument for new thread. */
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0, /* Creation flags. */
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NULL );
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/* Use the cores that are not used by the FreeRTOS tasks. */
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SetThreadAffinityMask( Win32Thread, ~0x01u );
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SetThreadPriorityBoost( Win32Thread, TRUE );
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SetThreadPriority( Win32Thread, THREAD_PRIORITY_IDLE );
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}
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}
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#else /* if ( ( ipconfigHAS_DEBUG_PRINTF == 1 ) || ( ipconfigHAS_PRINTF == 1 ) ) */
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{
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/* FreeRTOSIPConfig is set such that no print messages will be output.
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* Avoid compiler warnings about unused parameters. */
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( void ) xLogToStdout;
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( void ) xLogToFile;
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( void ) xLogToUDP;
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( void ) usRemotePort;
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( void ) ulRemoteIPAddress;
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}
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#endif /* ( ipconfigHAS_DEBUG_PRINTF == 1 ) || ( ipconfigHAS_PRINTF == 1 ) */
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}
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/*-----------------------------------------------------------*/
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static void prvCreatePrintSocket( void * pvParameter1,
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uint32_t ulParameter2 )
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{
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static const TickType_t xSendTimeOut = pdMS_TO_TICKS( 0 );
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Socket_t xSocket;
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/* The function prototype is that of a deferred function, but the parameters
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* are not actually used. */
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( void ) pvParameter1;
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( void ) ulParameter2;
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xSocket = FreeRTOS_socket( FREERTOS_AF_INET, FREERTOS_SOCK_DGRAM, FREERTOS_IPPROTO_UDP );
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if( xSocket != FREERTOS_INVALID_SOCKET )
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{
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/* FreeRTOS+TCP decides which port to bind to. */
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FreeRTOS_setsockopt( xSocket, 0, FREERTOS_SO_SNDTIMEO, &xSendTimeOut, sizeof( xSendTimeOut ) );
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FreeRTOS_bind( xSocket, NULL, 0 );
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/* Now the socket is bound it can be assigned to the print socket. */
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xPrintSocket = xSocket;
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}
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}
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/*-----------------------------------------------------------*/
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void vLoggingPrintf( const char * pcFormat,
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... )
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{
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char cPrintString[ dlMAX_PRINT_STRING_LENGTH ];
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char cOutputString[ dlMAX_PRINT_STRING_LENGTH ];
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char * pcSource, * pcTarget, * pcBegin;
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size_t xLength, xLength2, rc;
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static BaseType_t xMessageNumber = 0;
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static BaseType_t xAfterLineBreak = pdTRUE;
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va_list args;
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uint32_t ulIPAddress;
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const char * pcTaskName;
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const char * pcNoTask = "None";
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int iOriginalPriority;
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HANDLE xCurrentTask;
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if( ( xStdoutLoggingUsed != pdFALSE ) || ( xDiskFileLoggingUsed != pdFALSE ) || ( xUDPLoggingUsed != pdFALSE ) )
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{
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/* There are a variable number of parameters. */
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va_start( args, pcFormat );
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/* Additional info to place at the start of the log. */
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if( xTaskGetSchedulerState() != taskSCHEDULER_NOT_STARTED )
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{
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pcTaskName = pcTaskGetName( NULL );
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}
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else
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{
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pcTaskName = pcNoTask;
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}
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if( ( xAfterLineBreak == pdTRUE ) && ( strcmp( pcFormat, "\r\n" ) != 0 ) )
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{
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xLength = snprintf( cPrintString, dlMAX_PRINT_STRING_LENGTH, "%lu %lu [%s] ",
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xMessageNumber++,
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( unsigned long ) xTaskGetTickCount(),
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pcTaskName );
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xAfterLineBreak = pdFALSE;
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}
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else
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{
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xLength = 0;
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memset( cPrintString, 0x00, dlMAX_PRINT_STRING_LENGTH );
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xAfterLineBreak = pdTRUE;
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}
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xLength2 = vsnprintf( cPrintString + xLength, dlMAX_PRINT_STRING_LENGTH - xLength, pcFormat, args );
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if( xLength2 < 0 )
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{
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/* Clean up. */
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xLength2 = dlMAX_PRINT_STRING_LENGTH - 1 - xLength;
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cPrintString[ dlMAX_PRINT_STRING_LENGTH - 1 ] = '\0';
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}
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xLength += xLength2;
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va_end( args );
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/* For ease of viewing, copy the string into another buffer, converting
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* IP addresses to dot notation on the way. */
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pcSource = cPrintString;
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pcTarget = cOutputString;
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while( ( *pcSource ) != '\0' )
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{
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*pcTarget = *pcSource;
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pcTarget++;
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pcSource++;
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/* Look forward for an IP address denoted by 'ip'. */
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if( ( isxdigit( pcSource[ 0 ] ) != pdFALSE ) && ( pcSource[ 1 ] == 'i' ) && ( pcSource[ 2 ] == 'p' ) )
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{
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*pcTarget = *pcSource;
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pcTarget++;
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*pcTarget = '\0';
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pcBegin = pcTarget - 8;
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while( ( pcTarget > pcBegin ) && ( isxdigit( pcTarget[ -1 ] ) != pdFALSE ) )
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{
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pcTarget--;
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}
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sscanf( pcTarget, "%8X", &ulIPAddress );
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rc = sprintf( pcTarget, "%lu.%lu.%lu.%lu",
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( unsigned long ) ( ulIPAddress >> 24UL ),
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( unsigned long ) ( ( ulIPAddress >> 16UL ) & 0xffUL ),
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( unsigned long ) ( ( ulIPAddress >> 8UL ) & 0xffUL ),
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( unsigned long ) ( ulIPAddress & 0xffUL ) );
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pcTarget += rc;
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pcSource += 3; /* skip "<n>ip" */
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}
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}
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/* How far through the buffer was written? */
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xLength = ( BaseType_t ) ( pcTarget - cOutputString );
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/* If the message is to be logged to a UDP port then it can be sent directly
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* because it only uses FreeRTOS function (not Win32 functions). */
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if( xUDPLoggingUsed != pdFALSE )
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{
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if( ( xPrintSocket == FREERTOS_INVALID_SOCKET ) && ( FreeRTOS_IsNetworkUp() != pdFALSE ) )
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{
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/* Create and bind the socket to which print messages are sent. The
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* xTimerPendFunctionCall() function is used even though this is
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* not an interrupt because this function is called from the IP task
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* and the IP task cannot itself wait for a socket to bind. The
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* parameters to prvCreatePrintSocket() are not required so set to
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* NULL or 0. */
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xTimerPendFunctionCall( prvCreatePrintSocket, NULL, 0, dlDONT_BLOCK );
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}
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if( xPrintSocket != FREERTOS_INVALID_SOCKET )
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{
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FreeRTOS_sendto( xPrintSocket, cOutputString, xLength, 0, &xPrintUDPAddress, sizeof( xPrintUDPAddress ) );
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/* Just because the UDP data logger I'm using is dumb. */
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FreeRTOS_sendto( xPrintSocket, "\r", sizeof( char ), 0, &xPrintUDPAddress, sizeof( xPrintUDPAddress ) );
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}
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}
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/* If logging is also to go to either stdout or a disk file then it cannot
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* be output here - so instead write the message to the stream buffer and wake
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* the Win32 thread which will read it from the stream buffer and perform the
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* actual output. */
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if( ( xStdoutLoggingUsed != pdFALSE ) || ( xDiskFileLoggingUsed != pdFALSE ) )
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{
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configASSERT( xLogStreamBuffer );
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/* How much space is in the buffer? */
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xLength2 = uxStreamBufferGetSpace( xLogStreamBuffer );
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/* There must be enough space to write both the string and the length of
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* the string. */
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if( xLength2 >= ( xLength + sizeof( xLength ) ) )
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{
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/* First write in the length of the data, then write in the data
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* itself. Raising the thread priority is used as a critical section
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* as there are potentially multiple writers. The stream buffer is
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* only thread safe when there is a single writer (likewise for
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* reading from the buffer). */
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xCurrentTask = GetCurrentThread();
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iOriginalPriority = GetThreadPriority( xCurrentTask );
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SetThreadPriority( GetCurrentThread(), THREAD_PRIORITY_TIME_CRITICAL );
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uxStreamBufferAdd( xLogStreamBuffer, 0, ( const uint8_t * ) &( xLength ), sizeof( xLength ) );
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uxStreamBufferAdd( xLogStreamBuffer, 0, ( const uint8_t * ) cOutputString, xLength );
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SetThreadPriority( GetCurrentThread(), iOriginalPriority );
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}
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/* xDirectPrint is initialized to pdTRUE, and while it remains true the
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* logging output function is called directly. When the system is running
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* the output function cannot be called directly because it would get
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* called from both FreeRTOS tasks and Win32 threads - so instead wake the
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* Win32 thread responsible for the actual output. */
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if( xDirectPrint != pdFALSE )
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{
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/* While starting up, the thread which calls prvWin32LoggingThread()
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* is not running yet and xDirectPrint will be pdTRUE. */
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prvLoggingFlushBuffer();
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}
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else if( pvLoggingThreadEvent != NULL )
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{
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/* While running, wake up prvWin32LoggingThread() to send the
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* logging data. */
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SetEvent( pvLoggingThreadEvent );
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}
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}
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}
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}
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/*-----------------------------------------------------------*/
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static void prvLoggingFlushBuffer( void )
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{
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size_t xLength;
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char cPrintString[ dlMAX_PRINT_STRING_LENGTH ];
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/* Is there more than the length value stored in the circular buffer
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* used to pass data from the FreeRTOS simulator into this Win32 thread? */
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while( uxStreamBufferGetSize( xLogStreamBuffer ) > sizeof( xLength ) )
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{
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memset( cPrintString, 0x00, dlMAX_PRINT_STRING_LENGTH );
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uxStreamBufferGet( xLogStreamBuffer, 0, ( uint8_t * ) &xLength, sizeof( xLength ), pdFALSE );
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uxStreamBufferGet( xLogStreamBuffer, 0, ( uint8_t * ) cPrintString, xLength, pdFALSE );
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/* Write the message to standard out if requested to do so when
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* vLoggingInit() was called, or if the network is not yet up. */
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if( ( xStdoutLoggingUsed != pdFALSE ) || ( FreeRTOS_IsNetworkUp() == pdFALSE ) )
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{
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/* Write the message to stdout. */
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_write( _fileno( stdout ), cPrintString, strlen( cPrintString ) );
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}
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/* Write the message to a file if requested to do so when
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* vLoggingInit() was called. */
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if( xDiskFileLoggingUsed != pdFALSE )
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{
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prvLogToFile( cPrintString, xLength );
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}
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}
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prvFileClose();
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}
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/*-----------------------------------------------------------*/
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static DWORD WINAPI prvWin32LoggingThread( void * pvParameter )
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{
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const DWORD xMaxWait = 1000;
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( void ) pvParameter;
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/* From now on, prvLoggingFlushBuffer() will only be called from this
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* Windows thread */
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xDirectPrint = pdFALSE;
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for( ; ; )
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{
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/* Wait to be told there are message waiting to be logged. */
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WaitForSingleObject( pvLoggingThreadEvent, xMaxWait );
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/* Write out all waiting messages. */
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prvLoggingFlushBuffer();
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}
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}
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/*-----------------------------------------------------------*/
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static void prvFileLoggingInit( void )
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|
{
|
|
FILE * pxHandle = fopen( pcLogFileName, "a" );
|
|
|
|
if( pxHandle != NULL )
|
|
{
|
|
fseek( pxHandle, SEEK_END, 0ul );
|
|
ulSizeOfLoggingFile = ftell( pxHandle );
|
|
fclose( pxHandle );
|
|
}
|
|
else
|
|
{
|
|
ulSizeOfLoggingFile = 0ul;
|
|
}
|
|
}
|
|
/*-----------------------------------------------------------*/
|
|
|
|
static void prvFileClose( void )
|
|
{
|
|
if( pxLoggingFileHandle != NULL )
|
|
{
|
|
fclose( pxLoggingFileHandle );
|
|
pxLoggingFileHandle = NULL;
|
|
}
|
|
}
|
|
/*-----------------------------------------------------------*/
|
|
|
|
static void prvLogToFile( const char * pcMessage,
|
|
size_t xLength )
|
|
{
|
|
if( pxLoggingFileHandle == NULL )
|
|
{
|
|
pxLoggingFileHandle = fopen( pcLogFileName, "a" );
|
|
}
|
|
|
|
if( pxLoggingFileHandle != NULL )
|
|
{
|
|
fwrite( pcMessage, 1, xLength, pxLoggingFileHandle );
|
|
ulSizeOfLoggingFile += xLength;
|
|
|
|
/* If the file has grown to its maximum permissible size then close and
|
|
* rename it - then start with a new file. */
|
|
if( ulSizeOfLoggingFile > ( size_t ) dlLOGGING_FILE_SIZE )
|
|
{
|
|
prvFileClose();
|
|
|
|
if( _access( pcFullLogFileName, 00 ) == 0 )
|
|
{
|
|
remove( pcFullLogFileName );
|
|
}
|
|
|
|
rename( pcLogFileName, pcFullLogFileName );
|
|
ulSizeOfLoggingFile = 0;
|
|
}
|
|
}
|
|
}
|
|
/*-----------------------------------------------------------*/
|
|
|
|
void vPlatformInitLogging(void)
|
|
{
|
|
vLoggingInit(pdTRUE, pdFALSE, pdFALSE, 0U, 0U);
|
|
}
|
|
/*-----------------------------------------------------------*/
|