[Bug mi/9831] very slow loading of symbols under mi2 & core dumps

[Bug mi/9831] very slow loading of symbols under mi2 & core dumps

[timblaktu at gmail dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=9831

timblaktu at gmail dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |timblaktu at gmail dot com

--- Comment #5 from timblaktu at gmail dot com 2011-01-22 01:23:59 UTC ---
I 'm experiencing a possibly similar problem using gdb 7.0.1-debian. This
problem does not happen when debugging my app via command line - it only
happens when using gdb MI via eclipse. Here is the problem:

When I enter main(), eclipse issues a 

543,915 20-stack-list-locals --thread 1 --frame 0 1

MI command to gdb, and it hangs for about a minute. Then the response comes
back and seems to contain correct data. Then I can single step again, but when
I do, the same process repeats. Each time it hangs, top on linux tells me that
there is a "gdb --interpreter mi2 --nx" process that is hogging a core on my
machine.

I have #ifdef stubbed out code in main() until I have a simple case that hangs
and a simple case that doesn't hang. The only difference is the inclusion of
one more source line that declares/initializes a struct local variable. There
is nothing very peculiar about this struct.

Everything else looks the same for the good and bad case. Again, this behavior
does not happen when debugging the same app via gdb command line and printing
the locals. It seems MI-specific.

-- 
Configure bugmail: http://sourceware.org/bugzilla/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are on the CC list for the bug.

[Bug mi/9831] very slow loading of symbols under mi2 & core dumps

[timblaktu at gmail dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=9831

--- Comment #6 from timblaktu at gmail dot com 2011-01-22 02:00:57 UTC ---
I found another eclipse user that had the exact same problem I'm
having:
https://bugs.eclipse.org/bugs/show_bug.cgi?format=multiple&id=324522

He claims that this has been fixed in 7.2, but I just upgraded to 7.2-debian
(debian unstable package) and am gettting the same behavior.

-- 
Configure bugmail: http://sourceware.org/bugzilla/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are on the CC list for the bug.

[Bug mi/9831] very slow loading of symbols under mi2 & core dumps

[dje at google dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=9831

dje at google dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |dje at google dot com

--- Comment #7 from dje at google dot com 2011-12-14 16:00:39 UTC ---
This is potentially fixed in gdb 7.4, but I don't know for sure.

2011-11-15  Doug Evans  <dje@google.com>

        PR gdb/8367
        * NEWS: Mention new parameter basenames-may-differ.
        * dwarf2read.c (dw2_lookup_symtab): Avoid calling gdb_realpath if
        ! basenames_may_differ.
        * psymtab.c (lookup_partial_symtab): Ditto.
        * symtab.c (lookup_symtab): Ditto.
        (basenames_may_differ): New global.
        (_initialize_symtab): New parameter basenames-may-differ.
        * symtab.h (basenames_may_differ): Declare.

-- 
Configure bugmail: http://sourceware.org/bugzilla/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are on the CC list for the bug.

[Bug mi/9831] very slow loading of symbols under mi2 & core dumps

[tromey at sourceware dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=9831

Tom Tromey <tromey at sourceware dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |FIXED
                 CC|                            |tromey at sourceware dot org

--- Comment #8 from Tom Tromey <tromey at sourceware dot org> ---
I think this is probably fixed.
Please comment and/or reopen if you think that's in error.
Thanks.

-- 
You are receiving this mail because:
You are on the CC list for the bug.

[Bug mi/9831] very slow loading of symbols under mi2 & core dumps

[tromey at redhat dot com]

------- Additional Comments From tromey at redhat dot com  2009-04-14 16:26 -------
Thanks for reopening.

Here's the top of the gprof outout, for the record

  %   cumulative   self              self     total           
 time   seconds   seconds    calls   s/call   s/call  name    
 39.44      3.36     3.36      381     0.01     0.01  lookup_partial_symtab
  7.75      4.02     0.66    12908     0.00     0.00  gnu_debuglink_crc32
  6.22      4.55     0.53   124178     0.00     0.00  find_pc_sect_psymbol
  4.58      4.94     0.39     1880     0.00     0.00  expand_line_sal
  3.40      5.23     0.29  3154360     0.00     0.00  lbasename
  2.93      5.48     0.25  8847144     0.00     0.00  find_and_open_source
  2.82      5.72     0.24  4388152     0.00     0.00  openp

So this looks like another instance of Bug 8367.


-- 


http://sourceware.org/bugzilla/show_bug.cgi?id=9831

------- You are receiving this mail because: -------
You are on the CC list for the bug, or are watching someone who is.

[Bug mi/9831] very slow loading of symbols under mi2 & core dumps

[daniel dot santos at pobox dot com]

------- Additional Comments From daniel dot santos at pobox dot com  2009-04-14 03:12 -------
It happens on and off.  What other info do you need?  (i.e.,it's not consistent)
 Sometimes starting the debug process can take 30 seconds or more, while other
times, it only takes 3 seconds or so.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |UNCONFIRMED
         Resolution|INVALID                     |


http://sourceware.org/bugzilla/show_bug.cgi?id=9831

------- You are receiving this mail because: -------
You are on the CC list for the bug, or are watching someone who is.

[Bug mi/9831] very slow loading of symbols under mi2 & core dumps

[tromey at redhat dot com]

------- Additional Comments From tromey at redhat dot com  2009-04-12 17:12 -------
I'm closing this.
If it happens again, please reopen.  Thanks.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |INVALID


http://sourceware.org/bugzilla/show_bug.cgi?id=9831

------- You are receiving this mail because: -------
You are on the CC list for the bug, or are watching someone who is.

[Bug mi/9831] very slow loading of symbols under mi2 & core dumps

[daniel dot santos at pobox dot com]

------- Additional Comments From daniel dot santos at pobox dot com  2009-02-09 23:08 -------
eegads! The problem mysteriously stopped :(  Hopefully, I'll get more info, but
I can't seem to reproduce it anymore.

-- 


http://sourceware.org/bugzilla/show_bug.cgi?id=9831

------- You are receiving this mail because: -------
You are on the CC list for the bug, or are watching someone who is.