You can read the tutorial here. It looks at the different ways memory is used in a C program. Do you know for instance what BSS is and when it is used compared to Data or where variables in a function declared static are held in memory?
I also tried overwriting a text literal out of curiosity to see what happens. Here’s the source:
#include<stdio.h>
#include <string.h>
char* name="My name is David";
int main()
{
strcpy_s(name,10, "New name");
printf("Name = %s\n", name);
return 0;
}
I won’t be buying one for the moment but I mention it for another reason. 4 GB is the maximum RAM that a 32-bit OS can use, and on the PI like on Windows it’s actually 3 GB. To be fair you can have two processes each with 3 GB on the 8 GB Pi.
The announcement did mention that a beta 64-bit Raspbian OS is available for download and it’s here. This article shows that the 64-bit Os they tested is faster on the Pi than 32-bit. This link to the DietPi forum tells you how to boot dietpi into 64-bit.
It’s to be hoped that 64-bit ARM development software will become available. Clang and gcc should be but I’m thinking of the code.headmelted.com version of Visual Studio Code.
As always if you are buying a Raspberry Pi 4B, I strongly suggest you get a case with a fan. They are not expensive and do make a difference. Despite running the Asteroids game, which is pretty intense, I have never got my 4B temperature above 51C. THat said I’ve ordered a touchscreen with a case for a 4B on the back and it doesn’t seem to take a fan. So it will be interesting to see what its like fanless. More on that when the touchscreen arrives.
You can read the tutorial here. It looks at the different ways memory is used in a C program. Do you know for instance what BSS is and when it is used compared to Data or where variables in a function declared static are held in memory?