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[[!meta copyright="Copyright © 2012, 2013 Free Software Foundation, Inc."]]
[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable
id="license" text="Permission is granted to copy, distribute and/or modify this
document under the terms of the GNU Free Documentation License, Version 1.2 or
any later version published by the Free Software Foundation; with no Invariant
Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license
is included in the section entitled [[GNU Free Documentation
License|/fdl]]."]]"""]]
[[!meta title="GDB: attach"]]
[[!tag open_issue_gdb]]
# [[gdb_thread_ids]]
# IRC, freenode, #hurd, 2012-06-30
<braunr> hm, gdb isn't able to determine which thread is running when
attaching to a process
# IRC, freenode, #hurd, 2012-07-02
<braunr> woah, now that's a weird message !
<braunr> when using gdb on a hanged ext2fs :
<braunr> Pid 938 has an additional task suspend count of 1; clear it? (y or
n)
<braunr> when hanged, gdb thinks the target task is already being debugged
:/
<braunr> no wonder why it's completely stuck
<braunr> hm, the task_suspend might actually be the crash-dump-core server
attempting to create the core :/
<braunr> hm interesting, looks like a problem with the
diskfs_catch_exception macro
<pinotree> braunr: what's up with it?
<braunr> pinotree: it uses setjmp
<braunr> hm random corruptions :/
<braunr> definitely looks like a concurrency problem
# IRC, freenode, #hurd, 2012-05-23
<pinotree>
/build/buildd-gdb_7.4really-1-hurd-i386-UKStgK/gdb-7.4really/gdb/thread.c:72:
internal-error: inferior_thread: Assertion `tp' failed.
<pinotree> arg
<tschwinge> pinotree: Been doing anything "special"? Is it reproducible?
<pinotree> trying to debug something
<tschwinge> Indeed. ;-)
<pinotree> i'm not sure i'm doing anything special, just trying to attach a
process
<tschwinge> That is supposed to work.
<tschwinge> If the permission match.
# `gdb --pid [PID]`
That is, not explicitly specifying an `executable-file`.
## IRC, OFTC, debian-hurd, 2013-04-15
<paravoid> I don't seem to be able to run gdb
<paravoid> that happened on the buildd and happens on exodar too
<paravoid> #0 0x010c07cc in ?? ()
<paravoid> #1 0x010c1078 in ?? ()
<paravoid> #2 0x0109eabf in ?? ()
<paravoid> [...]
<paravoid> Backtrace stopped: previous frame inner to this frame (corrupt
stack?)
<paravoid> that's pid 24235 on exodar
<paravoid> I did gdb -p 24235 and then bt
<paravoid> just the output above
<youpi> I don't know about gdb -p
<youpi> I usually run gdb
/home/paravoid/gdnsd-1.8.1/plugins/meta/libgdmaps/t/.libs/lt-t17_extn_empty.bin
24235
<paravoid> okay, that indeed works
<youpi> I guess the support for finding out the binary automatically wasn't
done yet on hurd
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