Quality RTOS & Embedded Software

 Real time embedded FreeRTOS RSS feed 
Real time embedded FreeRTOS mailing list 
Quick Start Supported MCUs PDF Books Trace Tools Ecosystem TCP & FAT Training




Loading

Warning[Pa082]: undefined behavior: the order

Posted by John W. on May 9, 2006
Richard,

Warning[Pa082]: undefined behavior: the order of volatile accesses is undefined in this statement C:\..\Source\tasks.c 710

My line 710:

vListInsert( ( xList * ) pxOverflowDelayedTaskList, ( xListItem * ) &( pxCurrentTCB->xGenericListItem ) );

I have 8 more similar Warning messages in the tasks.c module - all list stuff.

I'm using the IAR tools - 3.41A - have you seen anything similar?

Thanks,
John W.

RE: Warning[Pa082]: undefined behavior: the o

Posted by John W. on May 9, 2006
OK - this looks similar to this thread:

https://sourceforge.net/forum/message.php?msg_id=3488120

I have warnings on the vListInsert() function which is a little different than what's in the above thread.

Regards,
John W.

RE: Warning[Pa082]: undefined behavior: the order

Posted by Richard on May 9, 2006
This is one of the pains in supporting so many different compilers. Some will warn if you assign a volatile pointer to a non volatile pointer, so a cast is required to keep the compiler quiet. Some will do the opposite and warn if you cast. To keep the compiler quite it is sometimes therefore necessary to just disable the warning in the project.

The warning is correct, but changing the code to remove it will just cause warning in other ports :-(

It is not going to cause you a problem (I don't think).

Regards,
Richard.

RE: Warning[Pa082]: undefined behavior: the o

Posted by John W. on May 10, 2006
Richard,

OK - all of the ports that I've done have this Warning - but they all work. One of the development boards that I did a port for has been running for weeks - so I suppose the port is OK...;)

Thanks,
John W.


[ Back to the top ]    [ About FreeRTOS ]    [ Sitemap ]    [ ]




Copyright (C) 2004-2010 Richard Barry. Copyright (C) 2010-2016 Real Time Engineers Ltd.
Any and all data, files, source code, html content and documentation included in the FreeRTOSTM distribution or available on this site are the exclusive property of Real Time Engineers Ltd.. See the files license.txt (included in the distribution) and this copyright notice for more information. FreeRTOSTM and FreeRTOS.orgTM are trade marks of Real Time Engineers Ltd.

Latest News:

FreeRTOS V9.0.0 is now available for download.


Free TCP/IP and file system demos for the RTOS


Sponsored Links

⇓ Now With No Code Size Limit! ⇓
⇑ Free Download Without Registering ⇑


FreeRTOS Partners

ARM Connected RTOS partner for all ARM microcontroller cores

Renesas Electronics Gold Alliance RTOS Partner.jpg

Microchip Premier RTOS Partner

RTOS partner of NXP for all NXP ARM microcontrollers

Atmel RTOS partner supporting ARM Cortex-M3 and AVR32 microcontrollers

STMicro RTOS partner supporting ARM7, ARM Cortex-M3, ARM Cortex-M4 and ARM Cortex-M0

Xilinx Microblaze and Zynq partner

Silicon Labs low power RTOS partner

Altera RTOS partner for Nios II and Cortex-A9 SoC

Freescale Alliance RTOS Member supporting ARM and ColdFire microcontrollers

Infineon ARM Cortex-M microcontrollers

Texas Instruments MCU Developer Network RTOS partner for ARM and MSP430 microcontrollers

Cypress RTOS partner supporting ARM Cortex-M3

Fujitsu RTOS partner supporting ARM Cortex-M3 and FM3

Microsemi (previously Actel) RTOS partner supporting ARM Cortex-M3

Atollic Partner

IAR Partner

Keil ARM Partner

Embedded Artists