senozhatsky
Joined 11 years ago
Karma
165
Submissions
76
Member since
Apr 10
Linux kernel developer. Japan.
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Comment · 1 year ago
That's sort of how Linux kernel trace-events are implemented [1]. E.g.
DECLARE_EVENT_CLASS(sched_wakeup_template,
TP_PROTO(struct task_struct *p),
TP_ARGS(__perf_task(p)),
TP_STRUCT__entry(
__array( char, comm, TASK_COMM_LEN )
__field( pid_t, pid )
__field( int, prio )
__field( int, target_cpu )
),
TP_fast_assign(
memcpy(__entry->comm, p->comm, TASK_COMM_LEN);
__entry->pid = p->pid;
__entry->prio = p->prio; /* XXX SCHED_DEADLINE */
__entry->target_cpu = task_cpu(p);
),
TP_printk("comm=%s pid=%d prio=%d target_cpu=%03d",
__entry->comm, __entry->pid, __entry->prio,
__entry->target_cpu)
);
Comment · 2 years ago
I wish they offered a paid version of the browser that would have ublock enabled.
Comment · 2 years ago
> meaning no local variables (still heavy usage of push/pop within a procedure, does this count as a local?)
Isn't it (push/pop) how locals basically work?
Comment · 6 years ago
Knuth's MIX computer with its 6-bit bytes and 5-byte words (IIRC) came to my mind [0]
Comment · 6 years ago
OK, understood. So what you meant was more like
puts()'s attack surface is smaller than printf()'s.
Comment · 6 years ago
Looks even better!
Comment · 6 years ago
Good point.
I suppose that you are talking about overwriting terminating NUL, do I get it right? puts() is vulnurable in exactly same way.
Comment · 6 years ago
> No. You don't really want to do that. If you're doing that, use puts
This is not the case for RO strings, is it?
Comment · 6 years ago
I see. So when for a char pointer one needs to do
printf("%p\n", v);
displayln((const void *)v);
Comment · 6 years ago
Could be. But wouldn't then displayln() require the same string placeholder? Be it "%s", or "{1}" or someting else.
Comment · 6 years ago
> printf("%s\n", "Hello, World!");
>
> That's an awful lot of symbolic syntax.
printf("Hello, World!\n");
One can do something like
printf("%s,%s%c\n", "Hello", "World", '!');
displayln("Hello, World!");
Comment · 7 years ago
I think Hyundai/Kia had self driving systems in development for the past, what, 5 years? Kia debuted its DriveWise in 2016. So they don't start from scratch.
Comment · 7 years ago
I pretend that '-s' stands for "source", not "symbolic"; and source file follows -s(ource) option.
IOW `ln -s A B' is `link source A to B'.