Latest revision as of 08:54, 28 March 2022

OCEOS Logging

OCEOS logs time stamped records of anomalies detected during execution.

Logging Introduction

OCEOS logging is structured as a circular buffer, older entries are overwritten by new entries once all entries are in use. System calls are provided to add entries the log, set its maximum size, and return the number of entries, and reset.
It is set up initially as an array of 32-bit words that starts at a 32-bit aligned address provided by the application developer.

OCEOS does not change the log entries after reset, so if log area is located in non-volatile memory, after reset, the application can read to recover possible reasons of failure. Only call to oceos_log_reset() can be used to reset all log entries if desired.

Log directives can be called from main() after oceos_init().

The read and write indices are stored in the log area and if equal indicate that the log is empty.

The application developer can specify a function to be called when 3/4 of log entries are in use. This function is called again only after 3/4 of log entries have been read and the log has again become 3/4 full.

Log entry types are defined in system_log.h header file. A log entry type is an 8-bit number. Values from 0 to 127 can be defined by the application developer. Values from 128 to 255 are used by OCEOS as below.

enum LOG_ENTRY_TYPE{
  LOG_SYS_OK = 0x80U,
  LOG_NULL_FATAL,
  LOG_OCEOS_ABORT,
  LOG_INVALID_SYSTEM_STATE,
  LOG_LOG_NOT_VALID_ENTRY,
  LOG_STATUS_INVALID,
  LOG_NULL_POINTER,
  LOG_INIT_FAIL,
  LOG_TIME_INIT_FAIL,
  LOG_TIME_CONFIG_FREEZE_FAIL,
  LOG_TIME_CONFIG_UNFREEZE_FAIL,
  LOG_TIME_RESET_FAIL,
  LOG_TIME_SCALER_FAIL,
  LOG_TIME_RELOAD_FAIL,
  LOG_TIME_COUNTER_FAIL,
  LOG_TIME_CONTROL_FAIL,
  LOG_TIME_POINTER_NULL,
  LOG_TIME_POINTER_LOW_NULL,
  LOG_TIME_START_FAIL,
  LOG_FIXED_INIT_FAIL,
  LOG_DYNAMIC_INIT_FAIL,
  LOG_INIT_TASK_START_FAIL,
  LOG_DEADLINE_MISSED,
  LOG_TASK_DISABLED,
  LOG_TASK_ENABLED,
  LOG_JOB_INVALID,
  LOG_JOB_NONE_FREE,
  LOG_JOB_NOT_EXECUTING,
  LOG_JOB_NOT_ACTIVE,
  LOG_READYQ_TOO_BIG,
  LOG_READYQ_SENTINEL_BAD,
  LOG_READYQ_FULL,
  LOG_READYQ_EMPTY,
  LOG_READYQ_PUT_DISABLED_TASK,
  LOG_READYQ_PUT_FAIL,
  LOG_READYQ_REMOVE_DONE,
  LOG_READYQ_REMOVE_FAIL,
  LOG_PARAM_BAD_ID,
  LOG_PARAM_BAD_TIME,
  LOG_PARAM_ACTION_MISSING,
  LOG_PARAM_JOB_MISSING,
  LOG_MUTEX_BAD_CEILING,
  LOG_MUTEX_ALREADY_HELD,
  LOG_MUTEX_ALREADY_FREE,
  LOG_MUTEX_WRONG_JOB,
  LOG_MUTEX_NESTING_BAD,
  LOG_MUTEX_EXIT_HOLDING,
  LOG_SEMAPHORE_COUNT_EXCEEDED,
  LOG_SEMAPHORE_MAX_ALREADY_REACHED,
  LOG_SEMAPHORE_INVALID_PENDING_JOB,
  LOG_SEMAPHORE_PENDING_REMOVE_FAIL,
  LOG_SEMAPHORE_PENDING_TIMED_REMOVE_FAIL,
  LOG_SEMAPHORE_TRANSFER_READYQ_FAIL,
  LOG_DATAQ_FULL,
  LOG_DATAQ_EMPTY,
  LOG_DATAQ_COUNT_EXCEEDED,
  LOG_DATAQ_PENDING_QUEUE_FULL,
  LOG_DATAQ_INVALID_PENDING_JOB,
  LOG_DATAQ_PENDING_REMOVE_FAIL,
  LOG_DATAQ_TIMED_JOB_REMOVE_FAIL,
  LOG_TIMED_ACTION_TIMER_NULL,
  LOG_TIMED_ACTION_TIMER_STOP_FAIL,
  LOG_TIMED_ACTION_NOT_INIT,
  LOG_TIMED_ACTION_INT_REG_FAILED, // Failed to register timed action interrupt handler
  LOG_TIMED_ACTION_INVALID,
  LOG_TIMED_ACTION_BAD_INDEX,
  LOG_TIMED_ACTION_MISSED,
  LOG_TIMED_ACTION_Q_FULL,
  LOG_TIMED_ACTION_Q_EMPTY,
  LOG_TIMED_ACTION_PUT_FAIL,
  LOG_TIMED_ACTION_REMOVE_FAIL,
  LOG_TIMED_ACTION_BAD_JOB_ID,
  LOG_TIMED_ACTION_DO_FAIL,
  LOG_SYSTEM_ERROR,
  LOG_TIME_BSP_SYSFREQ_NULL,
  LOG_SEMAPHORE_TIMEOUT_NOT_INIT,    // If user wants to use semaphore with timeout without previous initialization of timed actions
  LOG_DATAQ_TIMEOUT_NOT_INIT,       // If user wants to use dataq with timeout without previous initialization of timed actions
  LOG_TIMED_ACTION_START_WHILE_RUNNING,
  LOG_INT_HANDLER_IS_NULL,
  LOG_SET_OCEOS_TRAP_HANDLER_FAILED,
  LOG_INT_CALLED_NO_INIT,
  LOG_FAILED_SET_INT_PRIO,       // Failed to set PendSV priority
  LOG_FAILED_PENDSV_INIT,
  LOG_SYS_TIME_NOT_INIT          // System time is not initialized
};

Logging Configuration

Application defines arrays to hold OCEOS internal data. User must specified array to accommodate all logging information. Please read OCEOS data area layouts

#define LOG_DATA_ARRAY_SIZE_U32S                0x100// Calculated value. Read manual
U32_t log_data[LOG_DATA_ARRAY_SIZE_U32S];
...
/*
 * Create the application configuration structure
 */
struct application_configuration           app_config = {0};
app_config.log_address                   = (adrs_t)log_data;

User must define number of log entries.

#define NUMBER_OF_LOG_ENTRIES                   16 // 16 to 1024
/*
 * Create the application configuration structure
 */
struct application_configuration           app_config = {0};
app_config.log_number_of_entries         = NUMBER_OF_LOG_ENTRIES;

OCEOS will call a user defined function void oceos_on_full_log(void*).

void oceos_on_full_log(void*);
/*
* Create the application configuration structure
*/
struct application_configuration           app_config = {0};
app_config.log_full_function             = &oceos_on_full_log;            // NULL => ignore

API Functions

API Functions
Directive	Description	main	task	IRQ handler
oceos_log_add_entry()	Add a log entry	*	*	*
oceos_log_remove_entry()	Read and remove the oldest unread log entry	*	*	*
oceos_log_get_indexed_entry()	Read the log entry at the given index	*	*	*
oceos_log_reset()	Clear all log entries and reset to empty	*	*	*
oceos_log_get_size()	Get the number of log entries	*	*	*

oceos_log_add_entry()

Header File
system_log.h

Description
Add a log entry (32-bit time is included automatically).
Overwrites the oldest unread entry if the log is full.
Prototype
enum DIRECTIVE_STATUS   oceos_log_add_entry(
    enum LOG_ENTRY_TYPE type,// 8 bits
    const unsigned int info // information (24 bits)
);
Parameters

Parameter Description

type Log type (8 bits)

info Extra information (24 bits)

Returns
This function returns enum DIRECTIVE_STATUS.

enum DIRECTIVE_STATUS Description

NOT_CONFIGURED Log check state failed or
Logging manager is not initialized

INVALID_NUMBER Parameter info is more than 24 bits

INCORRECT_STATE Problem with read/write indexes

SUCCESSFUL All OK

Example Usage
enum DIRECTIVE_STATUS status;
status = oceos_log_add_entry(LOG_INVALID_SYSTEM_STATE, 0xcafe);  
if(SUCCESSFUL != status){
    // Handle ERROR
}

oceos_log_remove_entry()

Header File
system_log.h

Description
Read and remove the oldest unread log entry.
If the log is not empty use the entry at the read index to update the value at the output pointer, returning SUCCESSFUL.
If the log is empty, set the value at the output pointer to LOG_LOG_NOT_VALID_ENTRY and return UNSATISFIED.
The read index is incremented in a circular fashion.
Prototype
enum DIRECTIVE_STATUS   oceos_log_remove_entry(
    struct log_entry * const outputPtr
);
Parameters

Parameter Description

outputPtr Pointer to Log entry to return log information

Returns
This function returns enum DIRECTIVE_STATUS.

enum DIRECTIVE_STATUS Description

NOT_CONFIGURED Log check state failed or
Logging is not setup

INCORRECT_STATE Problem with read/write indexes

UNSATISFIED Log is empty

SUCCESSFUL All OK

Example Usage
enum DIRECTIVE_STATUS status;
struct log_entry outputPtr;
status = oceos_log_remove_entry(&outputPtr);
if(SUCCESSFUL != status){
    // Handle ERROR
}

oceos_log_get_indexed_entry()

Header File
system_log.h

Description
Read the log entry at the given index.
Returns the entry at the specified position in the log. The entry is not removed and the log and log indices are not changed.
(intended to allow the log be examined for example after reset)
Prototype
enum DIRECTIVE_STATUS   oceos_log_get_indexed_entry(
    const unsigned int index,
    struct log_entry * const outputPtr
);
Parameters

Parameter Description

index Log entry index

outputPtr log entry pointer

Returns
This function returns enum DIRECTIVE_STATUS.

enum DIRECTIVE_STATUS Description

NOT_CONFIGURED Logging is not set up

INVALID_NUMBER Index is out of range

INVALID_ADDRESS OutputPtr is NULL

SUCCESSFUL All OK

Example Usage
enum DIRECTIVE_STATUS status;
struct log_entry outputPtr;
status = oceos_log_get_indexed_entry(3, &outputPtr);
if(SUCCESSFUL != status){
    // Handle ERROR
}

oceos_log_reset()

Header File
system_log.h

Description
Clear all log entries and reset to empty. Set all log entries to LOG_NOT_VALID_ENTRY and the log to empty, with the read and write indices set to 0 and function called flag 0.
Does not affect the system status variable. Does not affect the context switch log.
Prototype
enum DIRECTIVE_STATUS   oceos_log_reset(void);
Parameters

Parameter Description

Returns
This function returns enum DIRECTIVE_STATUS.

enum DIRECTIVE_STATUS Description

NOT_CONFIGURED System Meta pointer is NULL or
Fixed data start sentinel is corrupt System Log pointer is NULL or Logging manager is not initialised

UNSATISFIED Log area end sentinel is corrupt

SUCCESSFUL All OK

Example Usage
enum DIRECTIVE_STATUS status;
status = oceos_log_reset();
if(SUCCESSFUL != status){
    // Handle ERROR
}

oceos_log_get_size()

Header File
system_log.h

Description
Get the number of log entries. Return the number of entries in the log according to the current values of the read and write indices.
The value will be zero if the current values of the read and write indices are the same.
Prototype
unsigned int            oceos_log_get_size(void);
Parameters

Parameter Description

Returns
This function returns unsigned int.

unsigned int Description

LOG_INVALID_SIZE Log state is invalid or
Logging manager is not initialised or Problem with read/write indexes

>= 0 Log size

Example Usage
U32_t size;
size = oceos_log_get_size();
if (LOG_INVALID_SIZE == size) {
  // Handle ERROR
}

Difference between revisions of "OCEOS/oceos logging"