Exceptions can't be catched, program abruptly terminates instead.

[XR.1]

Hi,

Exceptions allowed, the program abruptly terminates:

The program reaches this point before it terminates:

The debugger is set (I guess) no to halt on exceptions:

 

Any hints? Did I forget to initialize something?

 

 

[Aimen1]

Hello,

Could you please share the STM32CubeIDE and GCC versions that you are using?

Also, is it possible to send us your example?

Thanks.

 

[XR.1]

Hi!

From a project compilation I got this:

 

GNU C++17 (GNU Tools for STM32 10.3-2021.10.20211105-1100) version 10.3.1 20210824 (release) (arm-none-eabi)

compiled by GNU C version 7.5.0, GMP version 6.1.0, MPFR version 3.1.4, MPC version 1.0.3, isl version isl-0.18-GMP

 

The project is a very simple one. I was testing some C++20 features and specially exceptions for embedded systems, 'cause I want to write a blog post on this matter, but first I need to be sure that exceptions work altogether!

 

 

 

[fenardC]

Hi

What is working for me, is to select the correct the Runtime Library in the STM32CubeIDE for your project, in my case with v1.18.1, nano_c_standard_cpp

You can have a look in my public github repository (https://github.com/fenardC/B-U585I-IOT2A_EMW) with project in C/C++ on STM32.
This example uses C++ exceptions and i hope it will help you. 

Regards.

C.Fenard

[XR.1]

Hi!

Thank you for the advice, it worked!.

I've been thinking that exceptions for embedded systems weren't that bad... until I made them work.

In fact the nano_c_stardad_cpp variant let the exceptions to run as expected, with a high price to pay, though: massive FLASH usage:

No exceptions at all: 6KB

nano_c_reduced_cpp: 12 KB and doesn't work

nano_c_standard_cpp: 52KB (OMG!)

 

For chips with plenty of memory that can be feasible, but not for small size uC.

 

Such figures are correct?