bug#5404: 23.1.91; Nextstep port: M-x gdb hangs in tab completion of symbols

[Steve Revilak <steve@srevilak.net>]

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>> (gdb) complete b add_
>> b add_fdes
>> b add_one
>> b add_profil
>> (gdb)

>You could do M-x gdb-enable-debug, then 
>
>(gdb) b b add_<TAB>
>
>in the Gud buffer.
>
>Then inspect gdb-debug-log (C-h v) to see if "complete b add_" gets sent to Gdb.

Neat trick. :)


>I suspect it does and this relates to Apple Gdb and the previous problem with ^M
>characters.

Here's what I tried.

   1. emacs -Q -nw foo.c
   2. M-x gdb RET foo RET
   3. M-x gdb-enable-debug
   4. "b add_<TAB>"  [hangs]
   5. C-g twice (stops hanging)
   6. C-h v gdb-debug-log RET

I'll attach the contents of the *Help* buffer as gdb-debug-log.txt.

The last cons in gdb-debug-log.txt is (send-item ... "complete b
add_\n").  The second and third cons's above (send-item) seem to
contain the completion output.


>You could also download and compile FSF Gdb on Mac (I can't remember if you
>already have) and try that.

I haven't had a chance to build an fsf gdb yet, but I'm downloading
gdb-7.0.1 now.  I'll try gdb 7.0.1 and let you know how it goes.

Steve

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gdb-debug-log is a variable defined in `gdb-ui.el'.
Its value is shown below.

Documentation:
List of commands sent to and replies received from GDB.
Most recent commands are listed first.  This list stores only the last
`gdb-debug-log-max' values.  This variable is used to debug GDB-UI.

Value: 
((recv . "\r\n\x1a\x1apre-prompt\r\n(gdb) \r\n\x1a\x1aprompt\r\n")
 (recv . "No breakpoints or watchpoints.\r\n")
 (recv . "\r\n\x1a\x1apost-prompt\r\n")
 (send-item "server info breakpoints\n" gdb-info-breakpoints-handler)
 (recv . "\r\n\x1a\x1apre-prompt\r\n(gdb) \r\n\x1a\x1aprompt\r\n")
 (recv . "&\"\\n\\032\\032error-begin\\n\"\r\n~\"\\n\\032\\032error\\n\"\r\n^error,msg=\"No registers.\"\r\n(gdb) \r\n")
 (recv . "\r\n\x1a\x1apost-prompt\r\n")
 (send-item "server interpreter mi -stack-info-frame\n" gdb-frame-handler-1)
 (recv . "\r\n\x1a\x1apre-prompt\r\n(gdb) \r\n\x1a\x1aprompt\r\n")
 (recv . "b add_one\r\nb add_profil\r\n")
 (recv . "b add_fdes\r\n")
 (recv . "\r\n\x1a\x1apost-prompt\r\n")
 (send-item .
	    #("complete b add_\n" 9 15
	      (fontified t))))

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