void prvTraceInitTraceData()

in FreeRTOS-Plus/Source/FreeRTOS-Plus-Trace/trcSnapshotRecorder.c [2111:2230]

• 89 lines of code
• 6 McCabe index (conditional complexity)

void prvTraceInitTraceData()
{	
	
	if (RecorderDataPtr == NULL)
	{
#if (TRC_CFG_RECORDER_BUFFER_ALLOCATION == TRC_RECORDER_BUFFER_ALLOCATION_STATIC)
	RecorderDataPtr = &RecorderData;
#elif (TRC_CFG_RECORDER_BUFFER_ALLOCATION == TRC_RECORDER_BUFFER_ALLOCATION_DYNAMIC)
	RecorderDataPtr = (RecorderDataType*)TRACE_MALLOC(sizeof(RecorderDataType));
	if (! RecorderDataPtr)
	{
		prvTraceError("Failed allocating recorder buffer!");
		return;
	}
#elif (TRC_CFG_RECORDER_BUFFER_ALLOCATION == TRC_RECORDER_BUFFER_ALLOCATION_CUSTOM)
		if (! RecorderDataPtr)
		{
			prvTraceError("Recorder data pointer not set! Use vTraceSetRecorderDataBuffer().");
			return;
		}
#endif
	}
	else
	{
		if (RecorderDataPtr->startmarker0 == 1)
		{
			/* Already initialized */
			return;
		}
	}
	
	init_hwtc_count = TRC_HWTC_COUNT;
		
	(void)memset(RecorderDataPtr, 0, sizeof(RecorderDataType));
	
	RecorderDataPtr->version = TRACE_KERNEL_VERSION;
	RecorderDataPtr->minor_version = TRACE_MINOR_VERSION;
	RecorderDataPtr->irq_priority_order = TRC_IRQ_PRIORITY_ORDER;
	RecorderDataPtr->filesize = sizeof(RecorderDataType);
	RecorderDataPtr->maxEvents = (TRC_CFG_EVENT_BUFFER_SIZE);
	RecorderDataPtr->debugMarker0 = (int32_t) 0xF0F0F0F0;
	RecorderDataPtr->isUsing16bitHandles = TRC_CFG_USE_16BIT_OBJECT_HANDLES;
	RecorderDataPtr->isrTailchainingThreshold = TRC_CFG_ISR_TAILCHAINING_THRESHOLD;

	/* This function is kernel specific */
	vTraceInitObjectPropertyTable();

	RecorderDataPtr->debugMarker1 = (int32_t)0xF1F1F1F1;
	RecorderDataPtr->SymbolTable.symTableSize = (TRC_CFG_SYMBOL_TABLE_SIZE);
	RecorderDataPtr->SymbolTable.nextFreeSymbolIndex = 1;
#if (TRC_CFG_INCLUDE_FLOAT_SUPPORT == 1)
	RecorderDataPtr->exampleFloatEncoding = 1.0f; /* otherwise already zero */
#endif
	RecorderDataPtr->debugMarker2 = (int32_t)0xF2F2F2F2;
	prvStrncpy(RecorderDataPtr->systemInfo, "Trace Recorder Demo", 80);
	RecorderDataPtr->debugMarker3 = (int32_t)0xF3F3F3F3;
	RecorderDataPtr->endmarker0 = 0x0A;
	RecorderDataPtr->endmarker1 = 0x0B;
	RecorderDataPtr->endmarker2 = 0x0C;
	RecorderDataPtr->endmarker3 = 0x0D;
	RecorderDataPtr->endmarker4 = 0x71;
	RecorderDataPtr->endmarker5 = 0x72;
	RecorderDataPtr->endmarker6 = 0x73;
	RecorderDataPtr->endmarker7 = 0x74;
	RecorderDataPtr->endmarker8 = 0xF1;
	RecorderDataPtr->endmarker9 = 0xF2;
	RecorderDataPtr->endmarker10 = 0xF3;
	RecorderDataPtr->endmarker11 = 0xF4;

#if TRC_CFG_USE_SEPARATE_USER_EVENT_BUFFER
	RecorderDataPtr->userEventBuffer.bufferID = 1;
	RecorderDataPtr->userEventBuffer.version = 0;
	RecorderDataPtr->userEventBuffer.numberOfSlots = (TRC_CFG_SEPARATE_USER_EVENT_BUFFER_SIZE);
	RecorderDataPtr->userEventBuffer.numberOfChannels = (TRC_CFG_UB_CHANNELS) + 1;
#endif

	/* Kernel specific initialization of the objectHandleStacks variable */
	vTraceInitObjectHandleStack();

	
	/* Finally, the 12-byte "start markers" are initialized, allowing for 
	Tracealyzer to find the trace data in a larger RAM dump. 
	
	The start and end markers must be unique, but without proper precautions there
	might be a risk of accidental duplicates of the start/end markers, e.g., due to
	compiler optimizations.
	
	The below initialization of the start marker is therefore made in reverse order 
	and the fields are volatile to ensure this assignment order. This to avoid any 
	chance of accidental duplicates of this elsewhere in memory.
	
	Moreover, the fields are set byte-by-byte to avoid endian issues.*/
	
	RecorderDataPtr->startmarker11 = 0xF4;
	RecorderDataPtr->startmarker10 = 0xF3;
	RecorderDataPtr->startmarker9 = 0xF2;
	RecorderDataPtr->startmarker8 = 0xF1;
	RecorderDataPtr->startmarker7 = 0x74;
	RecorderDataPtr->startmarker6 = 0x73;
	RecorderDataPtr->startmarker5 = 0x72;
	RecorderDataPtr->startmarker4 = 0x71;
	RecorderDataPtr->startmarker3 = 0x04;
	RecorderDataPtr->startmarker2 = 0x03;
	RecorderDataPtr->startmarker1 = 0x02;	
	RecorderDataPtr->startmarker0 = 0x01; 

	if (traceErrorMessage != NULL)
	{
		// An error was detected before vTraceEnable was called, make sure this is stored in the trace data.
		prvStrncpy(RecorderDataPtr->systemInfo, traceErrorMessage, 80);
		RecorderDataPtr->internalErrorOccured = 1;
		vTraceStop();
	}


	
#ifdef TRC_PORT_SPECIFIC_INIT
	TRC_PORT_SPECIFIC_INIT();
#endif
}