From: Tom Frank <gdbhelper@gmail.com>
To: gdb@sourceware.org
Subject: How can I explain for this? what is __kernel_vsyscall () ?
Date: Wed, 11 Jul 2012 10:12:00 -0000 [thread overview]
Message-ID: <CAMHBcgoGHAh6i4-HoUBURaNvViY6CmarRge_-rKyZd7hFqO00A@mail.gmail.com> (raw)
I debug a multithreads programme with gdb,as it runs I use the
'info threads' command, and find that most of the threads running at
__kernel_vsyscall () function
as below:
6 Thread 0xb61e4b90 (LWP 322) 0x008e7402 in __kernel_vsyscall ()
5 Thread 0xb6be5b90 (LWP 320) 0x008e7402 in __kernel_vsyscall ()
4 Thread 0xb7fe7b90 (LWP 318) 0x008e7402 in __kernel_vsyscall ()
3 Thread 0xb75e6b90 (LWP 316) 0x008e7402 in __kernel_vsyscall ()
* 1 Thread 0xb7fe86d0 (LWP 312) 0x0074c2b8 in clone () from
/lib/i686/nosegneg/libc.so.6
what is __kernel_vsyscall (), why most threads's frame is in that step ?
next reply other threads:[~2012-07-11 10:12 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-11 10:12 Tom Frank [this message]
2012-07-11 10:38 ` Bjoern Doebel
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=CAMHBcgoGHAh6i4-HoUBURaNvViY6CmarRge_-rKyZd7hFqO00A@mail.gmail.com \
--to=gdbhelper@gmail.com \
--cc=gdb@sourceware.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox