/g/ - syscall of the day: sigaltstack - Technology


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Anonymous
syscall of the day: sigaltstac(...) 04/02/26(Thu)08:25:13 No.108507823

File: 1561560501920.jpg (27 KB, 574x574)

syscall of the day: sigaltstack Anonymous 04/02/26(Thu)08:25:13 No.108507823

previous: >>108500959
#define __NR_sigaltstack        131
https://man7.org/linux/man-pages/man2/sigaltstack.2.html

tl;dr:
manage an alternative signal stack

pretty much there just to let you handle SIGSEGVs from stack overflows.
i always read this syscall as "sigal stack", like the manpages are baby talking at me lol. for that reason, i rather like it, but it's got a pretty niche use case. have any of you anons ever had occasion to use it before?

relevant resources:
man man
man syscalls
https://man7.org/linux/man-pages/
https://linux.die.net/man/
https://elixir.bootlin.com/linux/
https://elixir.bootlin.com/musl/
https://elixir.bootlin.com/glibc/

Anonymous
04/02/26(Thu)08:45:14 No.108507929

Anonymous 04/02/26(Thu)08:45:14 No.108507929

>>108507823
what's your goal ? Showing this whole board you're the most annoying autist ?

Anonymous
04/02/26(Thu)08:59:15 No.108507991

Anonymous 04/02/26(Thu)08:59:15 No.108507991

>>108507929
yep

Anonymous
04/02/26(Thu)09:02:14 No.108508007

Anonymous 04/02/26(Thu)09:02:14 No.108508007

>>108507823
show boob and vegan

Anonymous
04/02/26(Thu)09:03:41 No.108508015

Anonymous 04/02/26(Thu)09:03:41 No.108508015

>>108508007
nyo u

Anonymous
04/02/26(Thu)09:57:15 No.108508343

Anonymous 04/02/26(Thu)09:57:15 No.108508343

File: FoldpX7aMAAYTqI.jpg (83 KB, 1077x862)

83 KB JPG

>>108507823
this is used in the JVM to test if stack guard pages are removed when thread is detached

JDK-6929067

Anonymous
04/02/26(Thu)10:00:39 No.108508363

Anonymous 04/02/26(Thu)10:00:39 No.108508363

>>108508343
https://github.com/openjdk/jdk/blob/master/test/hotspot/jtreg/runtime/StackGuardPages/exeinvoke.c#L97

Anonymous
04/02/26(Thu)10:02:17 No.108508378

Anonymous 04/02/26(Thu)10:02:17 No.108508378

>>108507823
You're not a baby, you're a grown adult. Get a grip.

Anonymous
04/02/26(Thu)10:08:33 No.108508410

Anonymous 04/02/26(Thu)10:08:33 No.108508410

>>108507929
shut the fuck up, i like learning random ass syscalls.

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