wazari972

9 ms·

31.
by wazari972 10y ago
Interesting idea, I'll give it a try tomorrow! Did you have any particular reason not to use GDB and its Python interface? I guess that the trick is to set a breakpoint on *alloc/free, and inc/decrement a counter on breakpoin
32.
by wazari972 10y ago
> A 1/10000 chance of certain death doesn't sound like something I'd like to take. (maybe I was a little bit off, it's more likely that the risk of failure is 1/1000, so sum is 1/1.000.000) but the point is,
33.
by wazari972 10y ago
It's surprising to see such an article #1 in HN ... right after a long weekend of cave diving training! It's a sport that requires a lot of preparation, planning, risk estimation and counter-measures. My hobby cave dives are nothi
34.
by wazari972 11y ago
I'm really happy with this little drone, the Eachine H8. If you play video games, it's super quick to learn how to control it, and it's very resistant to crashes. ... and now I learn that I can hack the firmware! so for an &q
35.
by wazari972 11y ago
On the graph of total posts over the days of the week, do you know what time and timezone are the peaks? it seems very regular, like if only one/a few timezones where concerned. Do we have such a little posting power in Europe ... ?
36.
Debugging with GDB: a real life example(blog.0x972.info)
12 points by wazari972 11y ago|0 comments
37.
Debugging with GDB: a real life example(blog.0x972.info)
4 points by wazari972 11y ago|0 comments
38.
by wazari972 11y ago
This concept of translators looks very similar to FUSE (Filesystem in Userspace) in Linux, I wonder how it differs, is it easier to write? And how about the context switch cost? being used to Linux, I'd think that the execution flow ha
39.
by wazari972 11y ago
I have a travel book [1] with QR-codes that link to video sequences corresponding to that part of the book. Thay maybe the only time I used QR-code! 1: http://oceans.taraexpeditions.org/m/qui-est-tara/les-expedit..
40.
by wazari972 11y ago
That looks great, I'll give it a try at work! Basically, if I understand well, it's a GUI over `git add -p`. Instead of the CLI short diff, you get a `meld` instance that computes the diff between two (virtual) directories, one wi
41.
by wazari972 11y ago
I like to use interactive debuggers like gdb (for C) or pdb (for python) for that. You first have to localize a region (function) you want to study, then you reach one of its execution with a breakpoint, or a conditional breakpoint. Then, y
42.
by wazari972 11y ago
the problem with the "distinct functions" case is if end up doing this: if is_gain: calc_formula_is_gain(a, b) else: calc_formula(a, b) However a completly agree it makes sense with sin/cos functions.
43.
by wazari972 11y ago
that's what I think as well: - thanks for doing your job correctly, in a manner I appreciate/have nothing to complain against - thanks because you're not a machine, whereas many people may disdain you and act like they'r
44.
by wazari972 11y ago
I think bootloaders for Linux have more stages: the initial problem is the same, but then GRUB loads its configuration from [/boot]/grub2/grub.cfg. If it can load a config file, it can also load FS drivers or hibernation file
45.
by wazari972 11y ago
I'm not sure to see the point of the submission here, the only answer to the question I can see is: > So, I switched to Arch after almost 3 blue years. And the only why left for me is because others do it better!
46.
by wazari972 12y ago
starting counting at 0 is mainly because start + index * offset points to `start` when `offset` is 0 (ie, array indexing in C and other languages with 'direct' memory access). Any other reason?
47.
by wazari972 12y ago
I love the idea, I think I'll implement something like that to automatically log into the few services I host on my webserver: on machine boot and every hours `ssh webserver echo $SOURCE_IP > token`, and on the web app, if token is
48.
by wazari972 12y ago
it's surprising that Linus answers peacefully and pedagogically ! and thus it's a nice read to refresh the definition of semaphores, spinlocks and mutexes. Maybe you can edit the title and add a little [199] :-)
49.
by wazari972 12y ago
Nice article, although I'm not convinced by the first example (as is it now, and in first position): detecting uninitialized variables is a job for compilers: `gcc -Wuninitialized -Wmaybe-uninitialized`. That works well within a single
50.
by wazari972 12y ago
indeed, my bad! to my defense, the code looks a lot like C code ;-)
51.
by wazari972 12y ago
I wanted to give it a try, but if fails without considering the target attribute ... > gcc test.c -g > test.c:9:5: error: redefinition of ‘foo’ > int foo () > gcc version 4.9.2 (GCC) (archlinux)
52.
by wazari972 12y ago
I've updated the article based on you comments, thanks :-) (title more focused, How is Ptrace implemented, What about systems without Ptrace)
53.
by wazari972 12y ago
I've updated the article with a section on `How is Ptrace implemented?`, I hope it will answer your question!
54.
by wazari972 12y ago
I never had access to the low-level part of embedded systems, although I did my PhD on embedded systems debugging in an embedded system company! what I saw was what was running on the PC and communicating with the JTAG external interface
55.
by wazari972 12y ago
thanks, regarding your feedback, I don't see any shadow in FF! The CSS is not mine, and there's indeed a `text-shadow` set for the text so I've removed it. Let me know if it's still bad, and maybe which browser you'
56.
by wazari972 12y ago
I'll update the article to explain a bit more why debugging is described in terms of ptrace: all the other targets work the same way! I studied simulators and corefiles, and they both provide to GDB an interface that is very similar
57.
How Does a Debugger Work?(blog.0x972.info)
102 points by wazari972 12y ago|40 comments
58.
by wazari972 12y ago
That's a good database for discovering new music groups, it's pretty accurate for the different bands I know/tried. It's also interesting to look how the algorithm tries to improve the location of the different names, it
59.
Show HN: Add notification support to Owncloud Calendar with RSS aggregator(blog.0x972.info)
1 points by wazari972 12y ago|0 comments
60.
by wazari972 12y ago
My Thunderbird (v31) appears to leak my IP address ... or is it my Postfix server? anyway, it sounds bad regarding anonymity. Is it a configuration problem? my university lab email service has the same issue, so I guess it's a standard

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