Mirror of the gdb mailing list
 help / color / mirror / Atom feed
From: Thomas Glanzmann <sithglan@stud.uni-erlangen.de>
To: gdb@sources.redhat.com
Subject: Re: gdb eats 100% cpu for relative long time when I single step one instruction
Date: Mon, 27 Jun 2005 21:59:00 -0000	[thread overview]
Message-ID: <20050627215915.GE8659@cip.informatik.uni-erlangen.de> (raw)
In-Reply-To: <20050627214826.GA756@nevyn.them.org>

Hello,

> These are just display panes.  It sounds like something is broken
> inside the TUI.  You'll have to build a debuggable GDB and attach
> another gdb to it to see what it's spinning on.

I made a screenshot[1]. I guess that every time I do a single step gdb
tries to analyze the jzero_far function he thinks I am in. He also says 
jzero_far+1846439. But if this doesn't help I can attach.

I executed 'ni' in the gdb window and attached

	strace -o dbg -fp `pidof gdb`

And he does:

(excalibur) [~] cat dbg
1317  ptrace(PTRACE_PEEKTEXT, 1318, 0x8249d14, [0x49e94050]) = 0
1317  ptrace(PTRACE_PEEKTEXT, 1318, 0xb7fd0ce0, [0xb74400c0]) = 0
1317  ptrace(PTRACE_PEEKTEXT, 1318, 0x8249d14, [0x49e94050]) = 0
1317  ptrace(PTRACE_PEEKTEXT, 1318, 0x8249d18, [0x90fffffd]) = 0
1317  ptrace(PTRACE_PEEKTEXT, 1318, 0xb7fd0ce0, [0xb74400c0]) = 0
1317  ptrace(PTRACE_PEEKTEXT, 1318, 0x8249d18, [0x90fffffd]) = 0
1317  ptrace(PTRACE_PEEKTEXT, 1318, 0xb7fd0ce0, [0xb74400c0]) = 0
1317  ptrace(PTRACE_PEEKTEXT, 1318, 0x8249d1c, [0xff08458b]) = 0
1317  ptrace(PTRACE_PEEKTEXT, 1318, 0xb7fd0ce0, [0xb74400c0]) = 0
1317  ptrace(PTRACE_PEEKTEXT, 1318, 0x8249d1c, [0xff08458b]) = 0
1317  ptrace(PTRACE_PEEKTEXT, 1318, 0xb7fd0ce0, [0xb74400c0]) = 0
1317  ptrace(PTRACE_PEEKTEXT, 1318, 0x8249d1c, [0xff08458b]) = 0
...

(excalibur) [~] wc -l dbg
1728579 dbg

And I started the ptrace *after* I typed 'ni' in and interrupted it before 'ni'
came back:

	Thomas

[1] gdb screenshot
	http://wwwcip.informatik.uni-erlangen.de/~sithglan/shot1.png


  reply	other threads:[~2005-06-27 21:59 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-06-27 21:27 Thomas Glanzmann
2005-06-27 21:48 ` Daniel Jacobowitz
2005-06-27 21:59   ` Thomas Glanzmann [this message]
2005-06-27 22:02     ` Daniel Jacobowitz
2005-06-27 22:11       ` Thomas Glanzmann
2005-06-28 12:27         ` Thomas Glanzmann
2005-06-28 13:13           ` Daniel Jacobowitz

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=20050627215915.GE8659@cip.informatik.uni-erlangen.de \
    --to=sithglan@stud.uni-erlangen.de \
    --cc=gdb@sources.redhat.com \
    /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