From: Ralph Corderoy <email@example.com>
Subject: [COFF] Re: Conditions, AKA exceptions.
Date: Sun, 12 Mar 2023 10:44:17 +0000 [thread overview]
Message-ID: <20230312104417.DC1DF215AA@orac.inputplus.co.uk> (raw)
> > > cmd = aprintf("gdb -batch -ex backtrace '%s/bk' %u 1>&%d 2>&%d",
> > > bin, getpid(), fileno(f), fileno(f));
> > It works surprisingly often, i.e. the process is healthy enough to
> > run system(3).
> On Linux (or some other system using glibc) a limited facility is
> built into the C library. So you can just do somthing like this:
> frames = backtrace(stack_syms, 32);
> backtrace_symbols_fd(stack_syms, frames, 2);
Since ’99, yes. :-) backtrace(3) says glibc 2.1 added it.
> I use this for the fsck for ext4, and the nice thing is that even with
> a stripped binary.
> For example:
Yes, that is nice.
Thanks, I've made a note.
Do you ever find things are so messed up that stdio has trouble whereas
using write(2) with compile-time memory allocations for a buffer would
have a better chance of reaching the TTY?
next prev parent reply other threads:[~2023-03-12 10:44 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-10 17:11 [COFF] Re: [TUHS] Re: Conditions, AKA exceptions. (Was: I can't drive 55: "GOTO considered harmful" 55th anniversary) Bakul Shah
2023-03-10 17:28 ` segaloco via COFF
2023-03-10 17:34 ` Larry McVoy
2023-03-10 17:35 ` Bakul Shah
2023-03-10 17:42 ` Larry McVoy
2023-03-11 11:28 ` [COFF] Conditions, AKA exceptions Ralph Corderoy
2023-03-12 4:23 ` [COFF] " Theodore Ts'o
2023-03-12 10:44 ` Ralph Corderoy [this message]
2023-03-12 16:46 ` Paul Winalski
2023-03-12 16:53 ` Larry McVoy
2023-03-10 17:43 ` [COFF] Re: [TUHS] Re: Conditions, AKA exceptions. (Was: I can't drive 55: "GOTO considered harmful" 55th anniversary) segaloco via COFF
2023-03-10 18:03 ` Dan Cross
2023-03-10 18:57 ` Bakul Shah
2023-03-10 19:57 ` Marshall Conover
2023-03-13 16:47 ` [COFF] Conditions, AKA exceptions Ralph Corderoy
2023-03-13 17:10 ` [COFF] " Paul Winalski
2023-03-13 21:12 ` Dave Horsfall
2023-03-10 17:47 ` [COFF] Re: [TUHS] Re: Conditions, AKA exceptions. (Was: I can't drive 55: "GOTO considered harmful" 55th anniversary) Bakul Shah
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