• Severin Teona (42/42) Dec 21 2020 Hi all!
• IGotD- (4/6) Dec 21 2020 Sorry, I had difficulties understanding that sentence. If the
• Severin Teona (4/7) Dec 21 2020 It was an intermediate step and I only wanted to see if the

Severin Teona <teona.severin9 gmail.com> writes:

Hi all!

This is my last update of the 3rd Milestone in #SAoC2020.

My last post is at [1]. The original plans for this week were to:
- solve the problems I had with my emulator to have a working 
testing environment;
- versioning the DRuntime, if the application would be working 
correctly;
- if any error appear, I would dig in the current setup to solve 
the problems.

Since last week, I did the following:
- I changed the version of renode (until last week, I was using 
the last stabe release of renode, and from now on I will be using 
the master repository directly - the support for the 
STM32F4-based board is better on the master repo).
- I tried emulating the simple application I managed to link the 
previous week, but I had some errors;
- I tried running the application directly on the development 
board (in theory it should have fit, because the size of the 
application was smaller than 2MB), but it ended in some errors;
- I started debugging the application and I discovered some 
problems with the memory alignment (long story short, the final 
userspace application was not aligned in a manner that the TockOS 
kernel process could load it correctly). I managed to resolve 
this problem by making some sections 16-bytes aligned.
- I managed to run on the microcontroller a simple application 
that does not need the DRuntime but is linked with it.
- I tried running an application that does this: `auto x = new 
int;` but I had errors.
- I updated the testing environment using Docker [2]

I do not know how much will I be able to do the next month and I 
am pretty sure this project will not end when #SAoC2020 ends, but 
the next steps for me are:
- start debugging the current DRuntime and find where the errors 
come from;
- as the DRuntime is a shared library that automatically starts 
the GC and the DRuntime I am working with is a static library, my 
mentor suggested that I could try to manually call the 
`Runtime.initialize()` from my application to start de GC. I will 
focus my work on this.

[1]: 
https://forum.dlang.org/post/xqiaphttdtbohfmwwppm forum.dlang.org
[2]: https://github.com/DLang-IoT/renode_tester.git

IGotD- <nise nise.com> writes:

On Monday, 21 December 2020 at 16:23:09 UTC, Severin Teona wrote:
 - I managed to run on the microcontroller a simple application 
 that does not need the DRuntime but is linked with it.

Sorry, I had difficulties understanding that sentence. If the 
simple program doesn't need druntime, why link to it? I'm 
confused.

Severin Teona <teona.severin9 gmail.com> writes:

On Monday, 21 December 2020 at 17:34:59 UTC, IGotD- wrote:

 Sorry, I had difficulties understanding that sentence. If the 
 simple program doesn't need druntime, why link to it? I'm 
 confused.

It was an intermediate step and I only wanted to see if the 
current size of the DRuntime could fit the small flash memory of 
the microcontroller.