[DiscordArchive] what could cause a C++ program to have some bugs when compiled by someone else ?
[DiscordArchive] what could cause a C++ program to have some bugs when compiled by someone else ?
Original source
Uninitialised integers may contain any value and are illegal to read/write from until they are initialized (that's called indeterminate value).
rektbyfaith
12-23-2022, 07:14 AM #11Archived author: Skarn • Posted: 2022-12-23T07:14:42.602000+00:00
Original source
Uninitialised integers may contain any value and are illegal to read/write from until they are initialized (that's called indeterminate value).
Original source
The other compiler or configuration may have that memory 0ed by accident, but you can't rely on that. Just initialize that stuff properly in a class constructor.
rektbyfaith
12-23-2022, 07:15 AM #12Archived author: Skarn • Posted: 2022-12-23T07:15:52.899000+00:00
Original source
The other compiler or configuration may have that memory 0ed by accident, but you can't rely on that. Just initialize that stuff properly in a class constructor.
Original source
The worst thing is when you write past pointer boundaries thus corrupting the heap, and you get a random exception somewhere in the app, where it could not happen like at all
rektbyfaith
12-23-2022, 07:23 AM #13Archived author: Deamon • Posted: 2022-12-23T07:23:06.129000+00:00
Original source
The worst thing is when you write past pointer boundaries thus corrupting the heap, and you get a random exception somewhere in the app, where it could not happen like at all
Original source
Hell yes, had to run valgrind on live server which is 10x or even worse performance cut to find out of bounds write
rektbyfaith
12-23-2022, 07:27 AM #14Archived author: robinsch • Posted: 2022-12-23T07:27:52.344000+00:00
Original source
Hell yes, had to run valgrind on live server which is 10x or even worse performance cut to find out of bounds write
Original source
would just crash in random places, but only took a few hours until some sneaky person used "some opcode" to write out of bounds, still possible to crash any AC server and it will not generate a valid crashlog for you :[
rektbyfaith
12-23-2022, 07:29 AM #15Archived author: robinsch • Posted: 2022-12-23T07:29:01.999000+00:00
Original source
would just crash in random places, but only took a few hours until some sneaky person used "some opcode" to write out of bounds, still possible to crash any AC server and it will not generate a valid crashlog for you :[
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