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* [Bug shlibs/11488] fsf gdb x86_64-apple-darwin  crashes when loading libraries due to an endless loop
       [not found] <bug-11488-4717@http.sourceware.org/bugzilla/>
@ 2010-10-16 14:26 ` vr5 at yandex dot ru
  2011-01-01  4:11 ` cam at mcc dot id.au
                   ` (32 subsequent siblings)
  33 siblings, 0 replies; 36+ messages in thread
From: vr5 at yandex dot ru @ 2010-10-16 14:26 UTC (permalink / raw)
  To: gdb-prs

http://sourceware.org/bugzilla/show_bug.cgi?id=11488

vr5 at yandex dot ru changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |vr5 at yandex dot ru

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* [Bug shlibs/11488] fsf gdb x86_64-apple-darwin  crashes when loading libraries due to an endless loop
       [not found] <bug-11488-4717@http.sourceware.org/bugzilla/>
  2010-10-16 14:26 ` [Bug shlibs/11488] fsf gdb x86_64-apple-darwin crashes when loading libraries due to an endless loop vr5 at yandex dot ru
@ 2011-01-01  4:11 ` cam at mcc dot id.au
  2011-05-24 14:00 ` a.broekhuis at gmail dot com
                   ` (31 subsequent siblings)
  33 siblings, 0 replies; 36+ messages in thread
From: cam at mcc dot id.au @ 2011-01-01  4:11 UTC (permalink / raw)
  To: gdb-prs

http://sourceware.org/bugzilla/show_bug.cgi?id=11488

Cameron McCormack <cam at mcc dot id.au> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |cam at mcc dot id.au

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* [Bug shlibs/11488] fsf gdb x86_64-apple-darwin  crashes when loading libraries due to an endless loop
       [not found] <bug-11488-4717@http.sourceware.org/bugzilla/>
  2010-10-16 14:26 ` [Bug shlibs/11488] fsf gdb x86_64-apple-darwin crashes when loading libraries due to an endless loop vr5 at yandex dot ru
  2011-01-01  4:11 ` cam at mcc dot id.au
@ 2011-05-24 14:00 ` a.broekhuis at gmail dot com
  2011-05-24 14:55 ` andre.poenitz at nokia dot com
                   ` (30 subsequent siblings)
  33 siblings, 0 replies; 36+ messages in thread
From: a.broekhuis at gmail dot com @ 2011-05-24 14:00 UTC (permalink / raw)
  To: gdb-prs

http://sourceware.org/bugzilla/show_bug.cgi?id=11488

Alexander <a.broekhuis at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |a.broekhuis at gmail dot
                   |                            |com

--- Comment #3 from Alexander <a.broekhuis at gmail dot com> 2011-05-24 13:59:31 UTC ---
Hello,

Is there any update on this problem? I run into the same using the latest GDB
(7.2) from macports.

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* [Bug shlibs/11488] fsf gdb x86_64-apple-darwin  crashes when loading libraries due to an endless loop
       [not found] <bug-11488-4717@http.sourceware.org/bugzilla/>
                   ` (2 preceding siblings ...)
  2011-05-24 14:00 ` a.broekhuis at gmail dot com
@ 2011-05-24 14:55 ` andre.poenitz at nokia dot com
  2011-05-24 14:58 ` vr5 at yandex dot ru
                   ` (29 subsequent siblings)
  33 siblings, 0 replies; 36+ messages in thread
From: andre.poenitz at nokia dot com @ 2011-05-24 14:55 UTC (permalink / raw)
  To: gdb-prs

http://sourceware.org/bugzilla/show_bug.cgi?id=11488

Andre Poenitz <andre.poenitz at nokia dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Version|7.1                         |HEAD
   Target Milestone|7.1                         |---

--- Comment #4 from Andre Poenitz <andre.poenitz at nokia dot com> 2011-05-24 14:55:17 UTC ---
I don't think so. For the last few times the topic came up on Freenode's #gdb
channel (and it does so every few weeks), the result was one tenth "works for
me" (but presumably because the guy was either not using C++ or not using
Frameworks) and nine tenth "can't reproduce, as I don't have a Mac". Given that
Apple already jumped to LLDB, this doesn't look like it will ever be fixed.

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* [Bug shlibs/11488] fsf gdb x86_64-apple-darwin  crashes when loading libraries due to an endless loop
       [not found] <bug-11488-4717@http.sourceware.org/bugzilla/>
                   ` (3 preceding siblings ...)
  2011-05-24 14:55 ` andre.poenitz at nokia dot com
@ 2011-05-24 14:58 ` vr5 at yandex dot ru
  2011-06-09 14:33 ` fawzi at gmx dot ch
                   ` (28 subsequent siblings)
  33 siblings, 0 replies; 36+ messages in thread
From: vr5 at yandex dot ru @ 2011-05-24 14:58 UTC (permalink / raw)
  To: gdb-prs

http://sourceware.org/bugzilla/show_bug.cgi?id=11488

vr5 at yandex dot ru changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|vr5 at yandex dot ru        |

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* [Bug shlibs/11488] fsf gdb x86_64-apple-darwin  crashes when loading libraries due to an endless loop
       [not found] <bug-11488-4717@http.sourceware.org/bugzilla/>
                   ` (4 preceding siblings ...)
  2011-05-24 14:58 ` vr5 at yandex dot ru
@ 2011-06-09 14:33 ` fawzi at gmx dot ch
  2011-06-18 20:39 ` josh at joshmatthews dot net
                   ` (27 subsequent siblings)
  33 siblings, 0 replies; 36+ messages in thread
From: fawzi at gmx dot ch @ 2011-06-09 14:33 UTC (permalink / raw)
  To: gdb-prs

http://sourceware.org/bugzilla/show_bug.cgi?id=11488

Fawzi Mohamed <fawzi at gmx dot ch> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |fawzi at gmx dot ch

--- Comment #5 from Fawzi Mohamed <fawzi at gmx dot ch> 2011-06-09 14:32:34 UTC ---
I traced this problem to libobjc.A.dylib (i.e. the objective-c runtime).
It seems that there is something into it that cannot be parsed correctly by
decode_frame_entry.
apple-gdb simply doesn't try to run it on it (in fact on any mach-o lib without
info).
A simple hack would be to also not look into it, and indeed it works, but I
suppose that the decision to run it on all objects by default (unlike apple
that resorts to the minima info and exported symbols)  was done on purpose by
fsf, so one should fix the parsing.
I will try to look a bit more in detail into it.

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* [Bug shlibs/11488] fsf gdb x86_64-apple-darwin  crashes when loading libraries due to an endless loop
       [not found] <bug-11488-4717@http.sourceware.org/bugzilla/>
                   ` (5 preceding siblings ...)
  2011-06-09 14:33 ` fawzi at gmx dot ch
@ 2011-06-18 20:39 ` josh at joshmatthews dot net
  2011-06-20 10:30 ` fawzi at gmx dot ch
                   ` (26 subsequent siblings)
  33 siblings, 0 replies; 36+ messages in thread
From: josh at joshmatthews dot net @ 2011-06-18 20:39 UTC (permalink / raw)
  To: gdb-prs

http://sourceware.org/bugzilla/show_bug.cgi?id=11488

Josh Matthews <josh at joshmatthews dot net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |josh at joshmatthews dot
                   |                            |net

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* [Bug shlibs/11488] fsf gdb x86_64-apple-darwin  crashes when loading libraries due to an endless loop
       [not found] <bug-11488-4717@http.sourceware.org/bugzilla/>
                   ` (6 preceding siblings ...)
  2011-06-18 20:39 ` josh at joshmatthews dot net
@ 2011-06-20 10:30 ` fawzi at gmx dot ch
  2011-06-20 10:45 ` fawzi at gmx dot ch
                   ` (25 subsequent siblings)
  33 siblings, 0 replies; 36+ messages in thread
From: fawzi at gmx dot ch @ 2011-06-20 10:30 UTC (permalink / raw)
  To: gdb-prs

http://sourceware.org/bugzilla/show_bug.cgi?id=11488

--- Comment #6 from Fawzi Mohamed <fawzi at gmx dot ch> 2011-06-20 10:28:34 UTC ---
Created attachment 5806
  --> http://sourceware.org/bugzilla/attachment.cgi?id=5806
workaround for this bug on mac

A minimal workaround for the 7.2 branch to avoid the infinite loop triggered by
libobjc.A.dylib .
This is what apple gdb does, it skips dwarf2_build_frame_info when there is no
dwarf information. Apple version might still do it if the user forces the use
of eh info, something that is off by default.

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* [Bug shlibs/11488] fsf gdb x86_64-apple-darwin  crashes when loading libraries due to an endless loop
       [not found] <bug-11488-4717@http.sourceware.org/bugzilla/>
                   ` (7 preceding siblings ...)
  2011-06-20 10:30 ` fawzi at gmx dot ch
@ 2011-06-20 10:45 ` fawzi at gmx dot ch
  2011-06-20 11:06 ` fawzi at gmx dot ch
                   ` (24 subsequent siblings)
  33 siblings, 0 replies; 36+ messages in thread
From: fawzi at gmx dot ch @ 2011-06-20 10:45 UTC (permalink / raw)
  To: gdb-prs

http://sourceware.org/bugzilla/show_bug.cgi?id=11488

--- Comment #7 from Fawzi Mohamed <fawzi at gmx dot ch> 2011-06-20 10:44:49 UTC ---
Created attachment 5807
  --> http://sourceware.org/bugzilla/attachment.cgi?id=5807
patch on the top for 7.2 branch to skip stub libs or encrypted images

this is what apple gdb does, it might be that gdb parsing is robust enough, and
does not need it (I haven't done test libs that trigger this), but it might be
useful to skip parsing in these situations.

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* [Bug shlibs/11488] fsf gdb x86_64-apple-darwin  crashes when loading libraries due to an endless loop
       [not found] <bug-11488-4717@http.sourceware.org/bugzilla/>
                   ` (8 preceding siblings ...)
  2011-06-20 10:45 ` fawzi at gmx dot ch
@ 2011-06-20 11:06 ` fawzi at gmx dot ch
  2011-06-20 11:12 ` fawzi at gmx dot ch
                   ` (23 subsequent siblings)
  33 siblings, 0 replies; 36+ messages in thread
From: fawzi at gmx dot ch @ 2011-06-20 11:06 UTC (permalink / raw)
  To: gdb-prs

http://sourceware.org/bugzilla/show_bug.cgi?id=11488

Fawzi Mohamed <fawzi at gmx dot ch> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Attachment #5806|0                           |1
        is obsolete|                            |

--- Comment #8 from Fawzi Mohamed <fawzi at gmx dot ch> 2011-06-20 11:05:46 UTC ---
Created attachment 5808
  --> http://sourceware.org/bugzilla/attachment.cgi?id=5808
reformatted workaround for this bug on mac

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* [Bug shlibs/11488] fsf gdb x86_64-apple-darwin  crashes when loading libraries due to an endless loop
       [not found] <bug-11488-4717@http.sourceware.org/bugzilla/>
                   ` (9 preceding siblings ...)
  2011-06-20 11:06 ` fawzi at gmx dot ch
@ 2011-06-20 11:12 ` fawzi at gmx dot ch
  2011-06-20 11:13 ` fawzi at gmx dot ch
                   ` (22 subsequent siblings)
  33 siblings, 0 replies; 36+ messages in thread
From: fawzi at gmx dot ch @ 2011-06-20 11:12 UTC (permalink / raw)
  To: gdb-prs

http://sourceware.org/bugzilla/show_bug.cgi?id=11488

Fawzi Mohamed <fawzi at gmx dot ch> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Attachment #5807|0                           |1
        is obsolete|                            |

--- Comment #9 from Fawzi Mohamed <fawzi at gmx dot ch> 2011-06-20 11:10:39 UTC ---
Created attachment 5809
  --> http://sourceware.org/bugzilla/attachment.cgi?id=5809
reformatted patch to skip encrypted and stub libs

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* [Bug shlibs/11488] fsf gdb x86_64-apple-darwin  crashes when loading libraries due to an endless loop
       [not found] <bug-11488-4717@http.sourceware.org/bugzilla/>
                   ` (10 preceding siblings ...)
  2011-06-20 11:12 ` fawzi at gmx dot ch
@ 2011-06-20 11:13 ` fawzi at gmx dot ch
  2011-06-21 15:04 ` fawzi at gmx dot ch
                   ` (21 subsequent siblings)
  33 siblings, 0 replies; 36+ messages in thread
From: fawzi at gmx dot ch @ 2011-06-20 11:13 UTC (permalink / raw)
  To: gdb-prs

http://sourceware.org/bugzilla/show_bug.cgi?id=11488

--- Comment #10 from Fawzi Mohamed <fawzi at gmx dot ch> 2011-06-20 11:12:29 UTC ---
I am now looking at the mach-o format to see if I understand what is parsed
incorrectly in libobjc.A.dylib

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* [Bug shlibs/11488] fsf gdb x86_64-apple-darwin  crashes when loading libraries due to an endless loop
       [not found] <bug-11488-4717@http.sourceware.org/bugzilla/>
                   ` (11 preceding siblings ...)
  2011-06-20 11:13 ` fawzi at gmx dot ch
@ 2011-06-21 15:04 ` fawzi at gmx dot ch
  2011-06-21 21:37 ` ds at alliedmods dot net
                   ` (20 subsequent siblings)
  33 siblings, 0 replies; 36+ messages in thread
From: fawzi at gmx dot ch @ 2011-06-21 15:04 UTC (permalink / raw)
  To: gdb-prs

http://sourceware.org/bugzilla/show_bug.cgi?id=11488

--- Comment #11 from Fawzi Mohamed <fawzi at gmx dot ch> 2011-06-21 15:03:12 UTC ---
I have found the problem, and a way to detect it.
decode_frame_entry and decode_frame_entry_1 decodes both CIE or FDE.
A FDE has a back pointer to its CIE.
Sometime on mac this pointer is broken and points back to a FDE.
In libobjc.A.dylib this is particularly broken, and points back to 
As to parse the CIE if the pointer is unknown one simply calls
decode_frame_enty this inconsistency is not detected. One should split the
function, so that one that decodes only CIE is used, or peek, and ensure that
the CIE pointer actually points to a CIE.

I think that there is a strong argument to introduce such a check, as it is
just the correct thing to do, and if done correctly it doesn't slow down the
parsing of .eh_frame section.

Then one should think what to do in such a case, one can set the cie to null
(something that is detected later on), or to the last CIE.

That is not the end of the problem, because I noted that the information that
gdb is parsing as .eh_frame is different from what
  otool -s __TEXT __eh_frame libobjc.A.dylib
outputs, I don't know if this is expected or not, but the __TEXT __eh_frame
section of the mach-o executable looks much more sensible. This might be
connected with fat binaries, but I haven't investigated it yet.

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* [Bug shlibs/11488] fsf gdb x86_64-apple-darwin  crashes when loading libraries due to an endless loop
       [not found] <bug-11488-4717@http.sourceware.org/bugzilla/>
                   ` (12 preceding siblings ...)
  2011-06-21 15:04 ` fawzi at gmx dot ch
@ 2011-06-21 21:37 ` ds at alliedmods dot net
  2011-06-23 17:55 ` fawzi at gmx dot ch
                   ` (19 subsequent siblings)
  33 siblings, 0 replies; 36+ messages in thread
From: ds at alliedmods dot net @ 2011-06-21 21:37 UTC (permalink / raw)
  To: gdb-prs

http://sourceware.org/bugzilla/show_bug.cgi?id=11488

Scott Ehlert <ds at alliedmods dot net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |ds at alliedmods dot net

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* [Bug shlibs/11488] fsf gdb x86_64-apple-darwin  crashes when loading libraries due to an endless loop
       [not found] <bug-11488-4717@http.sourceware.org/bugzilla/>
                   ` (13 preceding siblings ...)
  2011-06-21 21:37 ` ds at alliedmods dot net
@ 2011-06-23 17:55 ` fawzi at gmx dot ch
  2011-06-23 18:10 ` ehsan.akhgari at gmail dot com
                   ` (18 subsequent siblings)
  33 siblings, 0 replies; 36+ messages in thread
From: fawzi at gmx dot ch @ 2011-06-23 17:55 UTC (permalink / raw)
  To: gdb-prs

http://sourceware.org/bugzilla/show_bug.cgi?id=11488

--- Comment #12 from Fawzi Mohamed <fawzi at gmx dot ch> 2011-06-23 17:54:16 UTC ---
Created attachment 5814
  --> http://sourceware.org/bugzilla/attachment.cgi?id=5814
ignores the routines_64 section

patch on the 7.2 branch to ignore the section with the init routines for dylibs
on 64 bit architectures (as done with 32 bit).
Removes the "unable to read unknown load command 0x1a" message.

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* [Bug shlibs/11488] fsf gdb x86_64-apple-darwin  crashes when loading libraries due to an endless loop
       [not found] <bug-11488-4717@http.sourceware.org/bugzilla/>
                   ` (15 preceding siblings ...)
  2011-06-23 18:10 ` ehsan.akhgari at gmail dot com
@ 2011-06-23 18:10 ` josh at joshmatthews dot net
  2011-06-23 18:13 ` ehsan.akhgari at gmail dot com
                   ` (16 subsequent siblings)
  33 siblings, 0 replies; 36+ messages in thread
From: josh at joshmatthews dot net @ 2011-06-23 18:10 UTC (permalink / raw)
  To: gdb-prs

http://sourceware.org/bugzilla/show_bug.cgi?id=11488

--- Comment #13 from Josh Matthews <josh at joshmatthews dot net> 2011-06-23 18:08:53 UTC ---
Thank you so much for doing this work. Applying all three patches to trunk
allowed me to run a debug build of Firefox for the first time. I did see a
bunch of output like this at first:

warning: can't find section '.const' in OSO file
/Users/jdm/src/mozilla-central/obj-ff-dbg/nsprpub/pr/src/io/./prscanf.o
warning: can't find section '.const' in OSO file
/Users/jdm/src/mozilla-central/obj-ff-dbg/nss/nssutil/dertime.o
warning: can't find section '*UND*' in OSO file
/Users/jdm/src/mozilla-central/obj-ff-dbg/toolkit/library/../../content/smil/nsSMILRepeatCount.o
warning: can't find section '*UND*' in OSO file
/Users/jdm/src/mozilla-central/obj-ff-dbg/toolkit/library/../../dist/lib/libcrmf.a(crmftmpl.o)

but it ran. The next time I tried, I saw this assertion after that earlier
spew:

machoread.c:392: internal-error: macho_add_oso_symfile: Assertion
`current_oso.symbol_table == NULL' failed.

But that's progress!

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* [Bug shlibs/11488] fsf gdb x86_64-apple-darwin  crashes when loading libraries due to an endless loop
       [not found] <bug-11488-4717@http.sourceware.org/bugzilla/>
                   ` (14 preceding siblings ...)
  2011-06-23 17:55 ` fawzi at gmx dot ch
@ 2011-06-23 18:10 ` ehsan.akhgari at gmail dot com
  2011-06-23 18:10 ` josh at joshmatthews dot net
                   ` (17 subsequent siblings)
  33 siblings, 0 replies; 36+ messages in thread
From: ehsan.akhgari at gmail dot com @ 2011-06-23 18:10 UTC (permalink / raw)
  To: gdb-prs

http://sourceware.org/bugzilla/show_bug.cgi?id=11488

Ehsan Akhgari <ehsan.akhgari at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |ehsan.akhgari at gmail dot
                   |                            |com

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* [Bug shlibs/11488] fsf gdb x86_64-apple-darwin  crashes when loading libraries due to an endless loop
       [not found] <bug-11488-4717@http.sourceware.org/bugzilla/>
                   ` (16 preceding siblings ...)
  2011-06-23 18:10 ` josh at joshmatthews dot net
@ 2011-06-23 18:13 ` ehsan.akhgari at gmail dot com
  2011-06-23 18:15 ` ehsan.akhgari at gmail dot com
                   ` (15 subsequent siblings)
  33 siblings, 0 replies; 36+ messages in thread
From: ehsan.akhgari at gmail dot com @ 2011-06-23 18:13 UTC (permalink / raw)
  To: gdb-prs

http://sourceware.org/bugzilla/show_bug.cgi?id=11488

Ehsan Akhgari <ehsan.akhgari at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Attachment #5809|0                           |1
           is patch|                            |
   Attachment #5809|application/octet-stream    |text/plain
          mime type|                            |

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* [Bug shlibs/11488] fsf gdb x86_64-apple-darwin  crashes when loading libraries due to an endless loop
       [not found] <bug-11488-4717@http.sourceware.org/bugzilla/>
                   ` (17 preceding siblings ...)
  2011-06-23 18:13 ` ehsan.akhgari at gmail dot com
@ 2011-06-23 18:15 ` ehsan.akhgari at gmail dot com
  2011-06-23 18:53 ` fawzi at gmx dot ch
                   ` (14 subsequent siblings)
  33 siblings, 0 replies; 36+ messages in thread
From: ehsan.akhgari at gmail dot com @ 2011-06-23 18:15 UTC (permalink / raw)
  To: gdb-prs

http://sourceware.org/bugzilla/show_bug.cgi?id=11488

Ehsan Akhgari <ehsan.akhgari at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Attachment #5814|0                           |1
           is patch|                            |
   Attachment #5814|application/octet-stream    |text/plain
          mime type|                            |

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* [Bug shlibs/11488] fsf gdb x86_64-apple-darwin  crashes when loading libraries due to an endless loop
       [not found] <bug-11488-4717@http.sourceware.org/bugzilla/>
                   ` (18 preceding siblings ...)
  2011-06-23 18:15 ` ehsan.akhgari at gmail dot com
@ 2011-06-23 18:53 ` fawzi at gmx dot ch
  2011-06-23 18:57 ` josh at joshmatthews dot net
                   ` (13 subsequent siblings)
  33 siblings, 0 replies; 36+ messages in thread
From: fawzi at gmx dot ch @ 2011-06-23 18:53 UTC (permalink / raw)
  To: gdb-prs

http://sourceware.org/bugzilla/show_bug.cgi?id=11488

Fawzi Mohamed <fawzi at gmx dot ch> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Attachment #5808|0                           |1
        is obsolete|                            |

--- Comment #14 from Fawzi Mohamed <fawzi at gmx dot ch> 2011-06-23 18:53:30 UTC ---
Created attachment 5815
  --> http://sourceware.org/bugzilla/attachment.cgi?id=5815
fixes read of mmaped sections

patch against the 7.2 branch that fixes the mmap based reading of sections of
fat architecture files (the mmap forgot the offset of the mach-o file within
the fat file (I also sneaked in a fix to support file offsets larger than 32
bits on 64 bit architectures, better be prepared ;).

This should fix a lot of errors, not only the eh_section, hopefully making the
debugger fully functional on mac.

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* [Bug shlibs/11488] fsf gdb x86_64-apple-darwin  crashes when loading libraries due to an endless loop
       [not found] <bug-11488-4717@http.sourceware.org/bugzilla/>
                   ` (19 preceding siblings ...)
  2011-06-23 18:53 ` fawzi at gmx dot ch
@ 2011-06-23 18:57 ` josh at joshmatthews dot net
  2011-06-23 19:40 ` fawzi at gmx dot ch
                   ` (12 subsequent siblings)
  33 siblings, 0 replies; 36+ messages in thread
From: josh at joshmatthews dot net @ 2011-06-23 18:57 UTC (permalink / raw)
  To: gdb-prs

http://sourceware.org/bugzilla/show_bug.cgi?id=11488

Josh Matthews <josh at joshmatthews dot net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Attachment #5815|0                           |1
           is patch|                            |
   Attachment #5815|application/octet-stream    |text/plain
          mime type|                            |

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* [Bug shlibs/11488] fsf gdb x86_64-apple-darwin  crashes when loading libraries due to an endless loop
       [not found] <bug-11488-4717@http.sourceware.org/bugzilla/>
                   ` (20 preceding siblings ...)
  2011-06-23 18:57 ` josh at joshmatthews dot net
@ 2011-06-23 19:40 ` fawzi at gmx dot ch
  2011-06-23 19:48 ` fawzi at gmx dot ch
                   ` (11 subsequent siblings)
  33 siblings, 0 replies; 36+ messages in thread
From: fawzi at gmx dot ch @ 2011-06-23 19:40 UTC (permalink / raw)
  To: gdb-prs

http://sourceware.org/bugzilla/show_bug.cgi?id=11488

Fawzi Mohamed <fawzi at gmx dot ch> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Attachment #5815|0                           |1
        is obsolete|                            |

--- Comment #15 from Fawzi Mohamed <fawzi at gmx dot ch> 2011-06-23 19:40:06 UTC ---
Created attachment 5816
  --> http://sourceware.org/bugzilla/attachment.cgi?id=5816
fixes mmap read of sections (C90 reformat)

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* [Bug shlibs/11488] fsf gdb x86_64-apple-darwin  crashes when loading libraries due to an endless loop
       [not found] <bug-11488-4717@http.sourceware.org/bugzilla/>
                   ` (21 preceding siblings ...)
  2011-06-23 19:40 ` fawzi at gmx dot ch
@ 2011-06-23 19:48 ` fawzi at gmx dot ch
  2011-06-23 20:13 ` fawzi at gmx dot ch
                   ` (10 subsequent siblings)
  33 siblings, 0 replies; 36+ messages in thread
From: fawzi at gmx dot ch @ 2011-06-23 19:48 UTC (permalink / raw)
  To: gdb-prs

http://sourceware.org/bugzilla/show_bug.cgi?id=11488

--- Comment #16 from Fawzi Mohamed <fawzi at gmx dot ch> 2011-06-23 19:48:14 UTC ---
Created attachment 5817
  --> http://sourceware.org/bugzilla/attachment.cgi?id=5817
ensures that the cie ptr of a fde is really a cie

patch against the 7.2 branch that checks that the CIE pointer in an FDE is a
CIE and not an FDE, otherwise when a for example an FDE points to itself you
have a recursive call that exhausts the stack (the fde tries to decode its cie,
as it is not in the table, which being a fde tries to decode its cie....).
This was what happened in libobjc.A.dylib.

There are various ways to detect this, I implemented one, but I think that in
some form the check should go in gdb, as it makes it more robust.

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* [Bug shlibs/11488] fsf gdb x86_64-apple-darwin  crashes when loading libraries due to an endless loop
       [not found] <bug-11488-4717@http.sourceware.org/bugzilla/>
                   ` (22 preceding siblings ...)
  2011-06-23 19:48 ` fawzi at gmx dot ch
@ 2011-06-23 20:13 ` fawzi at gmx dot ch
  2011-06-24 16:08 ` ehsan.akhgari at gmail dot com
                   ` (9 subsequent siblings)
  33 siblings, 0 replies; 36+ messages in thread
From: fawzi at gmx dot ch @ 2011-06-23 20:13 UTC (permalink / raw)
  To: gdb-prs

http://sourceware.org/bugzilla/show_bug.cgi?id=11488

--- Comment #17 from Fawzi Mohamed <fawzi at gmx dot ch> 2011-06-23 20:10:56 UTC ---
Hi Josh, you are welcome, now it should be even better, I hope to have fixed
all "blocking" bugs.

An overview for the reviewers:

Apple gdb simply ignores the eh_frame sections for the libraries without
embedded dwarf info, not using eh information (which was
http://sourceware.org/bugzilla/attachment.cgi?id=5808&action=diff ) but I find
that one should be able to use them, so I looked further and found the
"correct" fix.
As the path to it was a bit convoluted I have done a few improvements to pieces
of code that did fail as consequence of the original bug.

The "main" fix is
   http://sourceware.org/bugzilla/attachment.cgi?id=5816&action=diff
which fixes the mmaped read of sections.

I feel that
    http://sourceware.org/bugzilla/attachment.cgi?id=5817
which adds a check on the cie pointer is important and improves gdb robustness
and should also go in.

    http://sourceware.org/bugzilla/attachment.cgi?id=5814
adds the forgotten ignore of routine_64 load command, and should also go in

    http://sourceware.org/bugzilla/attachment.cgi?id=5809
is something that I have seen apple does and seems reasonable, but I have not
needed it, so I am not sure if it should go in

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* [Bug shlibs/11488] fsf gdb x86_64-apple-darwin  crashes when loading libraries due to an endless loop
       [not found] <bug-11488-4717@http.sourceware.org/bugzilla/>
                   ` (23 preceding siblings ...)
  2011-06-23 20:13 ` fawzi at gmx dot ch
@ 2011-06-24 16:08 ` ehsan.akhgari at gmail dot com
  2011-06-27 10:43 ` fawzi at gmx dot ch
                   ` (8 subsequent siblings)
  33 siblings, 0 replies; 36+ messages in thread
From: ehsan.akhgari at gmail dot com @ 2011-06-24 16:08 UTC (permalink / raw)
  To: gdb-prs

http://sourceware.org/bugzilla/show_bug.cgi?id=11488

--- Comment #18 from Ehsan Akhgari <ehsan.akhgari at gmail dot com> 2011-06-24 16:07:44 UTC ---
Fawzi, I tried your patches, but it seems that something is broken for me:

ehsanakhgari:~/src/gdb (ehsan-trial) [12:06:32]$ ./objdir/gdb/gdb ls
GNU gdb (GDB) 7.3.50.20110623-cvs
Copyright (C) 2011 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-apple-darwin10.7.0".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
"/bin/ls": not in executable format: File format not recognized
(gdb) r
Starting program:  
No executable file specified.
Use the "file" or "exec-file" command.
(gdb) quit

Do you have any ideas what's going wrong here?

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* [Bug shlibs/11488] fsf gdb x86_64-apple-darwin  crashes when loading libraries due to an endless loop
       [not found] <bug-11488-4717@http.sourceware.org/bugzilla/>
                   ` (24 preceding siblings ...)
  2011-06-24 16:08 ` ehsan.akhgari at gmail dot com
@ 2011-06-27 10:43 ` fawzi at gmx dot ch
  2011-06-27 15:46 ` fawzi at gmx dot ch
                   ` (7 subsequent siblings)
  33 siblings, 0 replies; 36+ messages in thread
From: fawzi at gmx dot ch @ 2011-06-27 10:43 UTC (permalink / raw)
  To: gdb-prs

http://sourceware.org/bugzilla/show_bug.cgi?id=11488

--- Comment #19 from Fawzi Mohamed <fawzi at gmx dot ch> 2011-06-27 10:41:44 UTC ---
Hi Ehsan, that looks like another bug, if I should guess, I would say that
something in gdb doesn't support fat main executables.
That is a separate issue, please open another bug report (if there isn't
already one about it).

Note that Tristan Gingold 2011-06-24 submitted a patch that also contains my
main fix, and it has been approved and already checked in so the core of this
bug should be basically fixed.
I haven't changed the status because I wasn't able to confirm the fix as the
master seems to be broken (and since a bit) at least on mac due to the removal
of ENUM_BITFIELD, which wasn't done fully consequently.

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* [Bug shlibs/11488] fsf gdb x86_64-apple-darwin  crashes when loading libraries due to an endless loop
       [not found] <bug-11488-4717@http.sourceware.org/bugzilla/>
                   ` (25 preceding siblings ...)
  2011-06-27 10:43 ` fawzi at gmx dot ch
@ 2011-06-27 15:46 ` fawzi at gmx dot ch
  2011-06-27 15:48 ` fawzi at gmx dot ch
                   ` (6 subsequent siblings)
  33 siblings, 0 replies; 36+ messages in thread
From: fawzi at gmx dot ch @ 2011-06-27 15:46 UTC (permalink / raw)
  To: gdb-prs

http://sourceware.org/bugzilla/show_bug.cgi?id=11488

--- Comment #20 from Fawzi Mohamed <fawzi at gmx dot ch> 2011-06-27 15:46:09 UTC ---
Created attachment 5823
  --> http://sourceware.org/bugzilla/attachment.cgi?id=5823
ensures that the cie ptr of a fde is really a cie (reformatted)

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* [Bug shlibs/11488] fsf gdb x86_64-apple-darwin  crashes when loading libraries due to an endless loop
       [not found] <bug-11488-4717@http.sourceware.org/bugzilla/>
                   ` (26 preceding siblings ...)
  2011-06-27 15:46 ` fawzi at gmx dot ch
@ 2011-06-27 15:48 ` fawzi at gmx dot ch
  2011-07-04 18:11 ` fawzi at gmx dot ch
                   ` (5 subsequent siblings)
  33 siblings, 0 replies; 36+ messages in thread
From: fawzi at gmx dot ch @ 2011-06-27 15:48 UTC (permalink / raw)
  To: gdb-prs

http://sourceware.org/bugzilla/show_bug.cgi?id=11488

Fawzi Mohamed <fawzi at gmx dot ch> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Attachment #5817|0                           |1
        is obsolete|                            |

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* [Bug shlibs/11488] fsf gdb x86_64-apple-darwin  crashes when loading libraries due to an endless loop
       [not found] <bug-11488-4717@http.sourceware.org/bugzilla/>
                   ` (27 preceding siblings ...)
  2011-06-27 15:48 ` fawzi at gmx dot ch
@ 2011-07-04 18:11 ` fawzi at gmx dot ch
  2011-09-06 18:19 ` jwatt at jwatt dot org
                   ` (4 subsequent siblings)
  33 siblings, 0 replies; 36+ messages in thread
From: fawzi at gmx dot ch @ 2011-07-04 18:11 UTC (permalink / raw)
  To: gdb-prs

http://sourceware.org/bugzilla/show_bug.cgi?id=11488

Fawzi Mohamed <fawzi at gmx dot ch> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED

--- Comment #21 from Fawzi Mohamed <fawzi at gmx dot ch> 2011-07-04 18:10:59 UTC ---
I confirmed that the current master has fixed this bug (previously my
environment did include an external ansidecl.h file, which broke my build).

Basically both "ignores the routines_64 section" and "fixes mmap read of
sections (C90 reformat)" (as done by Tristan) are in master.
Thus I am closing this bug.

I am still submitting the ciePtr patch as it improves the robustness of gdb.

The skipping of encrypted and stub libs, should probably wait if/until someone
finds it useful.

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* [Bug shlibs/11488] fsf gdb x86_64-apple-darwin  crashes when loading libraries due to an endless loop
       [not found] <bug-11488-4717@http.sourceware.org/bugzilla/>
                   ` (28 preceding siblings ...)
  2011-07-04 18:11 ` fawzi at gmx dot ch
@ 2011-09-06 18:19 ` jwatt at jwatt dot org
  2011-09-08  8:36 ` andre.poenitz at nokia dot com
                   ` (3 subsequent siblings)
  33 siblings, 0 replies; 36+ messages in thread
From: jwatt at jwatt dot org @ 2011-09-06 18:19 UTC (permalink / raw)
  To: gdb-prs

http://sourceware.org/bugzilla/show_bug.cgi?id=11488

Jonathan Watt <jwatt at jwatt dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jwatt at jwatt dot org

--- Comment #22 from Jonathan Watt <jwatt at jwatt dot org> 2011-09-06 17:41:31 UTC ---
Can someone who knows the gdb release process/schedule clarify which version of
gdb this fix will be in please?

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* [Bug shlibs/11488] fsf gdb x86_64-apple-darwin  crashes when loading libraries due to an endless loop
       [not found] <bug-11488-4717@http.sourceware.org/bugzilla/>
                   ` (29 preceding siblings ...)
  2011-09-06 18:19 ` jwatt at jwatt dot org
@ 2011-09-08  8:36 ` andre.poenitz at nokia dot com
  2011-09-08 15:39 ` jwatt at jwatt dot org
                   ` (2 subsequent siblings)
  33 siblings, 0 replies; 36+ messages in thread
From: andre.poenitz at nokia dot com @ 2011-09-08  8:36 UTC (permalink / raw)
  To: gdb-prs

http://sourceware.org/bugzilla/show_bug.cgi?id=11488

--- Comment #23 from Andre Poenitz <andre.poenitz at nokia dot com> 2011-09-07 06:09:27 UTC ---
I am not involved in the gdb release process in any way, but according to my
current understanding of the process I would expect this to show up in the gdb
7.4 release. Until then you can build from cvs or git.

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* [Bug shlibs/11488] fsf gdb x86_64-apple-darwin  crashes when loading libraries due to an endless loop
       [not found] <bug-11488-4717@http.sourceware.org/bugzilla/>
                   ` (30 preceding siblings ...)
  2011-09-08  8:36 ` andre.poenitz at nokia dot com
@ 2011-09-08 15:39 ` jwatt at jwatt dot org
  2014-02-16 19:43 ` jackie.rosen at hushmail dot com
  2014-05-28 19:45 ` schwab at sourceware dot org
  33 siblings, 0 replies; 36+ messages in thread
From: jwatt at jwatt dot org @ 2011-09-08 15:39 UTC (permalink / raw)
  To: gdb-prs

http://sourceware.org/bugzilla/show_bug.cgi?id=11488

--- Comment #24 from Jonathan Watt <jwatt at jwatt dot org> 2011-09-08 08:35:35 UTC ---
Thanks, Andre.

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* [Bug shlibs/11488] fsf gdb x86_64-apple-darwin  crashes when loading libraries due to an endless loop
       [not found] <bug-11488-4717@http.sourceware.org/bugzilla/>
                   ` (31 preceding siblings ...)
  2011-09-08 15:39 ` jwatt at jwatt dot org
@ 2014-02-16 19:43 ` jackie.rosen at hushmail dot com
  2014-05-28 19:45 ` schwab at sourceware dot org
  33 siblings, 0 replies; 36+ messages in thread
From: jackie.rosen at hushmail dot com @ 2014-02-16 19:43 UTC (permalink / raw)
  To: gdb-prs

https://sourceware.org/bugzilla/show_bug.cgi?id=11488

Jackie Rosen <jackie.rosen at hushmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jackie.rosen at hushmail dot com

--- Comment #25 from Jackie Rosen <jackie.rosen at hushmail dot com> ---
*** Bug 260998 has been marked as a duplicate of this bug. ***
Seen from the domain http://volichat.com
Page where seen: http://volichat.com/adult-chat-rooms
Marked for reference. Resolved as fixed @bugzilla.

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* [Bug shlibs/11488] fsf gdb x86_64-apple-darwin  crashes when loading libraries due to an endless loop
       [not found] <bug-11488-4717@http.sourceware.org/bugzilla/>
                   ` (32 preceding siblings ...)
  2014-02-16 19:43 ` jackie.rosen at hushmail dot com
@ 2014-05-28 19:45 ` schwab at sourceware dot org
  33 siblings, 0 replies; 36+ messages in thread
From: schwab at sourceware dot org @ 2014-05-28 19:45 UTC (permalink / raw)
  To: gdb-prs

https://sourceware.org/bugzilla/show_bug.cgi?id=11488

Andreas Schwab <schwab at sourceware dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|jackie.rosen at hushmail dot com   |

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* [Bug shlibs/11488] fsf gdb x86_64-apple-darwin  crashes when loading libraries due to an endless loop
  2010-04-12 10:09 [Bug shlibs/11488] New: " andre dot poenitz at nokia dot com
  2010-04-22  8:57 ` [Bug shlibs/11488] " danderson at mozilla dot com
@ 2010-09-21 15:51 ` arvid dot picciani at nokia dot com
  1 sibling, 0 replies; 36+ messages in thread
From: arvid dot picciani at nokia dot com @ 2010-09-21 15:51 UTC (permalink / raw)
  To: gdb-prs


------- Additional Comments From arvid dot picciani at nokia dot com  2010-09-21 15:51 -------
i can reproduce this without Qt:

g++ -g main.cpp -framework ApplicationServices 

where main.cpp only contains: int main(){}

the result ./a.out will fail to load in gdb 


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* [Bug shlibs/11488] fsf gdb x86_64-apple-darwin  crashes when loading libraries due to an endless loop
  2010-04-12 10:09 [Bug shlibs/11488] New: " andre dot poenitz at nokia dot com
@ 2010-04-22  8:57 ` danderson at mozilla dot com
  2010-09-21 15:51 ` arvid dot picciani at nokia dot com
  1 sibling, 0 replies; 36+ messages in thread
From: danderson at mozilla dot com @ 2010-04-22  8:57 UTC (permalink / raw)
  To: gdb-prs


------- Additional Comments From danderson at mozilla dot com  2010-04-22 08:57 -------
It looks like this happens for binaries that are linked against a Framework.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |danderson at mozilla dot com
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|                            |1


http://sourceware.org/bugzilla/show_bug.cgi?id=11488

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end of thread, other threads:[~2014-05-28 19:45 UTC | newest]

Thread overview: 36+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
     [not found] <bug-11488-4717@http.sourceware.org/bugzilla/>
2010-10-16 14:26 ` [Bug shlibs/11488] fsf gdb x86_64-apple-darwin crashes when loading libraries due to an endless loop vr5 at yandex dot ru
2011-01-01  4:11 ` cam at mcc dot id.au
2011-05-24 14:00 ` a.broekhuis at gmail dot com
2011-05-24 14:55 ` andre.poenitz at nokia dot com
2011-05-24 14:58 ` vr5 at yandex dot ru
2011-06-09 14:33 ` fawzi at gmx dot ch
2011-06-18 20:39 ` josh at joshmatthews dot net
2011-06-20 10:30 ` fawzi at gmx dot ch
2011-06-20 10:45 ` fawzi at gmx dot ch
2011-06-20 11:06 ` fawzi at gmx dot ch
2011-06-20 11:12 ` fawzi at gmx dot ch
2011-06-20 11:13 ` fawzi at gmx dot ch
2011-06-21 15:04 ` fawzi at gmx dot ch
2011-06-21 21:37 ` ds at alliedmods dot net
2011-06-23 17:55 ` fawzi at gmx dot ch
2011-06-23 18:10 ` ehsan.akhgari at gmail dot com
2011-06-23 18:10 ` josh at joshmatthews dot net
2011-06-23 18:13 ` ehsan.akhgari at gmail dot com
2011-06-23 18:15 ` ehsan.akhgari at gmail dot com
2011-06-23 18:53 ` fawzi at gmx dot ch
2011-06-23 18:57 ` josh at joshmatthews dot net
2011-06-23 19:40 ` fawzi at gmx dot ch
2011-06-23 19:48 ` fawzi at gmx dot ch
2011-06-23 20:13 ` fawzi at gmx dot ch
2011-06-24 16:08 ` ehsan.akhgari at gmail dot com
2011-06-27 10:43 ` fawzi at gmx dot ch
2011-06-27 15:46 ` fawzi at gmx dot ch
2011-06-27 15:48 ` fawzi at gmx dot ch
2011-07-04 18:11 ` fawzi at gmx dot ch
2011-09-06 18:19 ` jwatt at jwatt dot org
2011-09-08  8:36 ` andre.poenitz at nokia dot com
2011-09-08 15:39 ` jwatt at jwatt dot org
2014-02-16 19:43 ` jackie.rosen at hushmail dot com
2014-05-28 19:45 ` schwab at sourceware dot org
2010-04-12 10:09 [Bug shlibs/11488] New: " andre dot poenitz at nokia dot com
2010-04-22  8:57 ` [Bug shlibs/11488] " danderson at mozilla dot com
2010-09-21 15:51 ` arvid dot picciani at nokia dot com

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