[Bug tdep/10347] New: gdb crashes with MI commands in hook-stop

[Bug tdep/10347] New: gdb crashes with MI commands in hook-stop

[andre dot poenitz at nokia dot com]

Reproducible:

echo 'int main() {}' | gcc -x c -
echo -e 'define hook-stop\ninterpreter mi "-stack-list-locals 2"\nend\nb
main\nrun' > x  
gdb -x x ./a.out

-- 
           Summary: gdb crashes with MI commands in hook-stop
           Product: gdb
           Version: 6.8
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: tdep
        AssignedTo: unassigned at sourceware dot org
        ReportedBy: andre dot poenitz at nokia dot com
                CC: gdb-prs at sourceware dot org


http://sourceware.org/bugzilla/show_bug.cgi?id=10347

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[Bug mi/10347] gdb crashes with MI commands in hook-stop

[pedro at codesourcery dot com]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|tdep                        |mi


http://sourceware.org/bugzilla/show_bug.cgi?id=10347

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[Bug mi/10347] gdb crashes with MI commands in hook-stop

[marc dot khouzam at ericsson dot com]

------- Additional Comments From marc dot khouzam at ericsson dot com  2009-07-22 17:06 -------
This crash actually happens when using "interpreter mi" inside a define.
It is not only with hook-stop.  Below is an analysis from Paul P that comes from
  http://sourceware.org/ml/gdb/2009-07/msg00152.html

-----Original Message-----

From: Paul Pluzhnikov [mailto:ppluzhnikov@google.com] 

Sent: Tuesday, July 21, 2009 1:44 AM



The problem is that in cli/cli-script.c, execute_user_command(),

instream is set to NULL:



312	  /* Set the instream to 0, indicating execution of a

313	     user-defined function.  */

314	  make_cleanup (do_restore_instream_cleanup, instream);

315	  instream = (FILE *) 0;



and later used for fileno():



#0  0x00007ffff6ea19f0 in fileno_unlocked () from /lib/libc.so.6

#1  0x000000000051d2ff in gdb_setup_readline () at

../../src/gdb/event-top.c:1086

#2  0x00000000004aaa09 in mi_interpreter_resume (data=0x0) at

../../src/gdb/mi/mi-interp.c:107

#3  0x00000000005180d7 in interp_set (interp=0xa7a850, top_level=0) at

../../src/gdb/interps.c:197

#4  0x000000000051834e in interpreter_exec_cmd (args=<value optimized

out>, from_tty=<value optimized out>) at ../../src/gdb/interps.c:398

#5  0x0000000000459984 in execute_command (p=0xb295fd "t", from_tty=0)

at ../../src/gdb/top.c:442

#6  0x00000000004a2c04 in execute_control_command (cmd=0xb23c40) at

../../src/gdb/cli/cli-script.c:400

#7  0x00000000004a31ad in execute_user_command (c=0xb3fd60, args=0x0)

at ../../src/gdb/cli/cli-script.c:324




-- 


http://sourceware.org/bugzilla/show_bug.cgi?id=10347

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