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Re: *(char*)0 = 0;

Mike Hankey16-Oct-23 6:43

Mike Hankey

16-Oct-23 6:43

I guess YouTube has gone to all commercials...f*** em!

I don't think before I open my mouth, I like to be as surprised a everyone else.
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Re: *(char*)0 = 0;

Jeremy Falcon17-Oct-23 2:24

Jeremy Falcon

17-Oct-23 2:24

We're not in a recession.
Inflation is good for you.

That's what the media tells us. What's worse is that the public will soon forget to and go back to believing what they see on TV.

Jeremy Falcon

Re: *(char*)0 = 0;

Mike Hankey17-Oct-23 3:45

Mike Hankey

17-Oct-23 3:45

Pay no attention to the man behind the curtain. Smile | :)

If you tell people something enough times they will eventually believe it.

And as far as media there is no longer a source for real news, It's all either right or left and the news people just spit out what they're told.

I don't think before I open my mouth, I like to be as surprised a everyone else.
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Re: *(char*)0 = 0;

Maximilien16-Oct-23 7:00

Maximilien

16-Oct-23 7:00

Nice, I like intellectual mast**bation.

CI/CD = Continuous Impediment/Continuous Despair

Re: *(char*)0 = 0;

Jeremy Falcon17-Oct-23 2:23

Jeremy Falcon

17-Oct-23 2:23

Ha ha ha. Truth bombs yo.

Jeremy Falcon

Re: *(char*)0 = 0;

honey the codewitch16-Oct-23 7:51

honey the codewitch

16-Oct-23 7:51

I've been coding for 37 years. I learned something about C++ in the first 4 minutes of this video.

Thank you. I might actually sit through this one. Big Grin | :-D

Check out my IoT graphics library here:
https://honeythecodewitch.com/gfx
And my IoT UI/User Experience library here:
https://honeythecodewitch.com/uix

Re: *(char*)0 = 0;

0x01AA16-Oct-23 8:30

0x01AA

16-Oct-23 8:30

*lol*, what is more important now? Understanding more or less crypted syntax of this and that language or understanding the business D'Oh! | :doh:

Re: *(char*)0 = 0;

Greg Utas16-Oct-23 12:02

Greg Utas

16-Oct-23 12:02

To be fair, a lot of the talk is about what happens when that code (which tries to write 0 using a null pointer) is compiled and executed. The code looks like it was written by a C hacker, so how would it be written in modern C++? What will the compiler generate? How will the operating system react? How do virtual memory, memory protection, and caching work? All of this is technical but useful in certain situations.

I agree that understanding one's domain and use cases is generally more important. I assume that's what you mean by "understanding the business". But don't get me started on motherelephanting pieces of elephant who run The Business™--one whose products require a lot of software development--but who couldn't care less about fostering a culture of software excellence, which means having people versed in this kind of arcane knowledge.

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The fox knows many things, but the hedgehog knows one big thing.

Re: *(char*)0 = 0;

Jeremy Falcon17-Oct-23 2:22

Jeremy Falcon

17-Oct-23 2:22

Great point man. There's a case for both types of peeps. Although AI will definitely move the needle in regard to how much arcane knowledge is needed. To his point however, typically (and I'm generalizing) most of the super hardcore devs have serious social issues. Not that crappy devs don't too. But, what if the hardcore dev makes the wrong thing or doesn't think outside the box to see if it's even needed? Arcane or not it's just wasting time. Or what if he/she isn't a team player?

So, while knowing what you're doing is super, duper important. I guess I'm just replying for the heck of it to say soft skills be important too. Laugh | :laugh:

Jeremy Falcon

Re: *(char*)0 = 0;

Jeremy Falcon17-Oct-23 2:18

Jeremy Falcon

17-Oct-23 2:18

Both are... but specialized knowledge will become much, much less important as machines just do it themselves and companies look to save money. Most coders don't really learn squat anyway, so it's not like much will change in that regard. Laugh | :laugh:

This is just the short-term mind you. Pretty sure in 300 years from now AI will be so advanced no human will ever be able to figure it out anymore.

Jeremy Falcon

Re: *(char*)0 = 0;

Jeremy Falcon17-Oct-23 2:14

Jeremy Falcon

17-Oct-23 2:14

What's the gist of the talk?

Jeremy Falcon

Re: *(char*)0 = 0;

Maximilien17-Oct-23 2:34

Maximilien

17-Oct-23 2:34

How a single "obscure" line of code can lead to a rabbit's hole of a discussion

It goes from the (char)0 = 0; to a modern C++ representation and how it can be executed on a near physical CPU

Thrue memory mapping from Virtual Space to Physical Space and page tables walking.

In the end, it's more like an interview question and see how a potential candidate can talk about this.

And as the speaker says, it's more a question for people that will work really low level (compilers, hardware ... )

CI/CD = Continuous Impediment/Continuous Despair

Re: *(char*)0 = 0;

Jeremy Falcon17-Oct-23 2:38

Jeremy Falcon

17-Oct-23 2:38

Maximilien wrote:
Thrue memory mapping from Virtual Space to Physical Space and page tables walking.

Crap, now I have to watch the video because I'm not connecting the dots of how (char)0 = 0 turns into talking about protected memory, etc. Unless the title is trying to sound fancy and has nothing to do with that? Unsure | :~

Jeremy Falcon

Re: *(char*)0 = 0;

Greg Utas17-Oct-23 4:04

Greg Utas

17-Oct-23 4:04

Writing through a pointer whose address is out of bounds to your process, like a null pointer, results in a trap because of memory protection. SIGSEGV on *nix systems and 0xC0000005 on Windows.

Robust Services Core | Software Techniques for Lemmings | Articles
The fox knows many things, but the hedgehog knows one big thing.

Re: *(char*)0 = 0;

Jeremy Falcon17-Oct-23 5:33

Jeremy Falcon

17-Oct-23 5:33

That makes sense sure, just never seen anyone write to a null pointer. Then again, anything can happen I guess. Laugh | :laugh:

Jeremy Falcon

Re: *(char*)0 = 0;

Greg Utas17-Oct-23 7:22

Greg Utas

17-Oct-23 7:22

In the video, he mentions that maybe someone wanted to do it on purpose! And indeed, I have code that does it (actually using an invalid pointer, not a null one) to test the ability to recover, instead of aborting, when it happens.

Robust Services Core | Software Techniques for Lemmings | Articles
The fox knows many things, but the hedgehog knows one big thing.

CCC 2023-10-16

yacCarsten15-Oct-23 21:48

yacCarsten

15-Oct-23 21:48

Lack of small period (8)

~~// TODO: Insert something here~~
Top ten reasons why I'm lazy
1.

Re: CCC 2023-10-16

pkfox15-Oct-23 22:34

pkfox

15-Oct-23 22:34

Shortage

Small: short
period: age

In a closed society where everybody's guilty, the only crime is getting caught. In a world of thieves, the only final sin is stupidity. - Hunter S Thompson - RIP

Re: CCC 2023-10-16 - winner

yacCarsten15-Oct-23 22:52

yacCarsten

15-Oct-23 22:52

tag, you're it tomorrow.

~~// TODO: Insert something here~~
Top ten reasons why I'm lazy
1.

BJOD bad joke of today

jmaida15-Oct-23 18:40

jmaida

15-Oct-23 18:40

What makes a celebrity cool?
Lots of fans!

"A little time, a little trouble, your better day"
Badfinger