[RFC] info threads takes an argument

[Michael Snyder]

Pedro Alves wrote:
> On Tuesday 15 February 2011 21:18:31, Michael Snyder wrote:
>> find.txt
>>   2011-02-15  Michael Snyder  <msnyder@vmware.com>
>>
>>         * command.h (enum command_class): New class 'no_set_class', for
>>         "show" commands without a corresponding "set" command.
>>         * value.c (_initialize_values): Use 'no_set_class' for "show values".
>>         * copying.c (_initialize_copying): Ditto for "show copying" and
>>         "show warranty".
>>         * cli/cli-cmds.c (init_cli_cmds): Ditto for "show commands" and
>>         "show version".
>>         * cli/cli-setshow.c (cmd_show_list): Skip "show" commands for
>>         which there is no corresponding "set" command (eg. "show copying").
> 
> Wrong changelog entry, btw.  Here's the correct one, to ease
> code archaeology / web search in the future:

Sorry, fixed.

> 
> 2011-02-15  Michael Snyder  <msnyder@vmware.com>
> 
>         * thread.c (info_threads_command): Process arg as thread id,
>         or list of thread ids.
>         (thread_find_command): New command.
>         (_initialize_thread): Document argument for info threads.
>         Document 'thread find' command.
>         * NEWS: Document new command "thread find".
> 
>> Index: NEWS
>> ===================================================================
>> RCS file: /cvs/src/src/gdb/NEWS,v
>> retrieving revision 1.425
>> diff -u -p -u -p -r1.425 NEWS
>> --- NEWS        5 Feb 2011 05:27:23 -0000       1.425
>> +++ NEWS        15 Feb 2011 21:14:27 -0000
>> @@ -3,6 +3,10 @@
>>  
>>  *** Changes since GDB 7.2
>>  
>> +* GDB has a new command: "thread find [REGEXP]".
>> +  It finds the thread id whose name, target id, or thread extra info
>> +  matches the given regular expression.
> 
> IMO, it'd be nice to mention the "info threads" change as well.
> 
> Anyway, the reason I'm replying is that I noticed a couple
> of new FAILs in this test, and looking at the log, I noticed
> another issue:

Urk.  I did half my work on the 7.2 branch, where it doesn't do this.
Let me fix it.

> info threads 2 4 6
>   Id   Target Id         Frame 
>   2    Thread 0x2aaaab6f4700 (LWP 335) "threadname_2" 0x00002aaaab24e2c3 in select () from /lib/libc.so.6
>   Id   Target Id         Frame 
>   4    Thread 0x2aaaabaf7700 (LWP 337) "threadname_4" 0x00002aaaab24e2c3 in select () from /lib/libc.so.6
>   Id   Target Id         Frame 
>   6    Thread 0x2aaaabef9700 (LWP 339) "threadname_6" 0x00002aaaab1f7050 in strchrnul () from /lib/libc.so.6
> (gdb) FAIL: gdb.threads/thread-find.exp: info threads 2 4 6
> info threads 3-5
>   Id   Target Id         Frame 
>   3    Thread 0x2aaaab8f5700 (LWP 336) "threadname_3" 0x00002aaaab24e2c3 in select () from /lib/libc.so.6
>   Id   Target Id         Frame 
>   4    Thread 0x2aaaabaf7700 (LWP 337) "threadname_4" 0x00002aaaab24e2c3 in select () from /lib/libc.so.6
>   Id   Target Id         Frame 
>   5    Thread 0x2aaaabcf8700 (LWP 338) "threadname_5" 0x00002aaaab24e2c3 in select () from /lib/libc.so.6
> (gdb) FAIL: gdb.threads/thread-find.exp: info threads 3-5
> 
> The header is printed once for each entry.  Was that
> intended?  It doesn't seem right to me.
>