RTOS/AM5728: Heap free issue

Yxxxx

Part Number: AM5728

Tool/software: TI-RTOS

Hi all,

I am coding on RTOS,Hardware is DSP in AM5728.

Two task are created with different priority,and one custom function is shared.The shared function using trigonometric function included in "cmath",which may using heap.

When the lower priority one is accessing the shared function,then high priority one is waked up (using Semaphore) and access the function too. An invalid free error is reported.

The question is if an error happen when two task access one function in the same time and operate heap?

Any not clear description, please let me know.

Best regards

over 8 years ago

0 Biser Gatchev-XID over 8 years ago

TI__Guru**** 393215 points

The RTOS team have been notified. They will respond here.

0 lding over 8 years ago in reply to Biser Gatchev-XID

TI__Guru* 95265 points

Hi,

Assume you have a common function, which includes malloc() and free(). The lower priority task is running then it is interrupted by the higher priority task. The higher priority task runs the same common function again. "An invalid free error is reported." =====> I don't understand why this is reported. Perhaps the lower task did a free() , then the higher task did a free() again? where the higher task allocate the memory?

Basically you need to determine if this common function can be re-entry by different tasks. You may look at semaphore to block the function re-entry, see processors.wiki.ti.com/.../BIOS_Online_Training

Regards, Eric

0 Yxxxx over 8 years ago in reply to lding

Intellectual 590 points

Thank you,Eric

Processors

Processors forum

RTOS/AM5728: Heap free issue