[Bug gdb/11896] New: symbol-file command crashes gdb with an assertion failure

[Bug gdb/11896] New: symbol-file command crashes gdb with an assertion failure

[sidneym at quicinc dot com]

Discarding a symbol file while a program is stopped at a breakpoint will cause
gdb to crash.  The problem doesn't look target specific and I tried it on an
Ubuntu vanilla install and from cvs and both seem to have the same problem.

To reproduce, set a breakpoint at main, run the program.  When the breakpoint at
main is hit do a "symbol-file" command with no arguments and gdb will crash. 
This gdb script will show the issue (assume main is an executable compiled with
debug information):

file main
br main
r
symbol-file

Will cause this assertion failure:
../../src/gdb/dwarf2-frame.c:956: internal-error: dwarf2_frame_cache: Assertion
`fde != NULL' failed.
A problem internal to GDB has been detected,
further debugging may prove unreliable.
Create a core file of GDB? (y or n) y

The specific version of gdb was:
GNU gdb (GDB) 7.2.50.20100806-cvs

-- 
           Summary: symbol-file command crashes gdb with an assertion
                    failure
           Product: gdb
           Version: 7.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: gdb
        AssignedTo: unassigned at sourceware dot org
        ReportedBy: sidneym at quicinc dot com
                CC: gdb-prs at sourceware dot org
 GCC build triplet: x86_64-unknown-linux-gnu
  GCC host triplet: x86_64-unknown-linux-gnu
GCC target triplet: x86_64-unknown-linux-gnu


http://sourceware.org/bugzilla/show_bug.cgi?id=11896

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[Bug gdb/11896] symbol-file command crashes gdb with an assertion failure

[tromey at redhat dot com]

------- Additional Comments From tromey at redhat dot com  2010-08-17 19:43 -------
I tried this on gdb itself ("gdb gdb; start; symbol-file") and it
worked fine for me.
Could you try it on some simple test program?  I wonder if there is
something special about whatever program you are debugging.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |tromey at redhat dot com


http://sourceware.org/bugzilla/show_bug.cgi?id=11896

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[Bug gdb/11896] symbol-file command crashes gdb with an assertion failure

[tromey at redhat dot com]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |WAITING


http://sourceware.org/bugzilla/show_bug.cgi?id=11896

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[Bug gdb/11896] symbol-file command crashes gdb with an assertion failure

[sidneym at quicinc dot com]

------- Additional Comments From sidneym at quicinc dot com  2010-08-18 14:58 -------
Created an attachment (id=4938)
 --> (http://sourceware.org/bugzilla/attachment.cgi?id=4938&action=view)
Simple testcase to demonstrate the issue.

This is a simple testcase that shows the issue.  I re-tested with today's gdb
(NU gdb (GDB) 7.2.50.20100818-cvs) and still see the problem.

I also tried, ./gdb gdb and didn't see the issue either, but when I did an
"info breakpoints" after discarding the symbol file gdb seg-faulted.  This is
what I did:
./gdb gdb
br main
r
symbol-file
info breakpoints
-----
This is my config:
  $ /prj/dsp/qdsp6/austin/users/sidneym/gnu/gdb/cvs/src/gdb/configure
--cache-file=./config.cache --with-system-zlib --program-transform-name=s,y,y,
--disable-option-checking --build=x86_64-unknown-linux-gnu
--host=x86_64-unknown-linux-gnu --target=x86_64-unknown-linux-gnu
--srcdir=../../src/gdb


-- 


http://sourceware.org/bugzilla/show_bug.cgi?id=11896

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[Bug gdb/11896] symbol-file command crashes gdb with an assertion failure

[sidneym at quicinc dot com]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |NEW
     Ever Confirmed|                            |1


http://sourceware.org/bugzilla/show_bug.cgi?id=11896

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[Bug gdb/11896] symbol-file command crashes gdb with an assertion failure

[ggs334 at 163 dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=11896

gaohusheng <ggs334 at 163 dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |ggs334 at 163 dot com

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[Bug gdb/11896] symbol-file command crashes gdb with an assertion failure

[ssbssa at sourceware dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=11896

Hannes Domani <ssbssa at sourceware dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |FIXED
             Status|NEW                         |RESOLVED
                 CC|                            |ssbssa at sourceware dot org
   Target Milestone|7.1                         |7.4

--- Comment #3 from Hannes Domani <ssbssa at sourceware dot org> ---
I can reproduce the problem with gdb-7.2, but not with gdb-7.4 or newer.
So I'm closing this.

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