[RFA,2/6] Remove some cleanups from probe.c

  This removes some cleanups from parse_probes by using std::string; and
removes some unnecessary cleanups from elsewhere in probe.c.

ChangeLog
2017-10-15  Tom Tromey  <tom@tromey.com>

	* probe.c (parse_probes): Use std::string.
	(info_probes_for_ops, enable_probes_command)
	(disable_probes_command): Remove cleanups.
---
 gdb/ChangeLog |  6 ++++++
 gdb/probe.c   | 24 ++++--------------------
 2 files changed, 10 insertions(+), 20 deletions(-)
  

On 2017-10-15 11:04 PM, Tom Tromey wrote:
> This removes some cleanups from parse_probes by using std::string; and
> removes some unnecessary cleanups from elsewhere in probe.c.
> 
> ChangeLog
> 2017-10-15  Tom Tromey  <tom@tromey.com>
> 
> 	* probe.c (parse_probes): Use std::string.
> 	(info_probes_for_ops, enable_probes_command)
> 	(disable_probes_command): Remove cleanups.
> ---
>  gdb/ChangeLog |  6 ++++++
>  gdb/probe.c   | 24 ++++--------------------
>  2 files changed, 10 insertions(+), 20 deletions(-)
> 
> diff --git a/gdb/probe.c b/gdb/probe.c
> index b3dbf896b9..e5a09211cb 100644
> --- a/gdb/probe.c
> +++ b/gdb/probe.c
> @@ -98,7 +98,6 @@ parse_probes (const struct event_location *location,
>  {
>    char *arg_end, *arg;
>    char *objfile_namestr = NULL, *provider = NULL, *name, *p;
> -  struct cleanup *cleanup;
>    const struct probe_ops *probe_ops;
>    const char *arg_start, *cs;
>  
> @@ -118,8 +117,8 @@ parse_probes (const struct event_location *location,
>    arg_end = skip_to_space (arg);
>  
>    /* We make a copy here so we can write over parts with impunity.  */
> -  arg = savestring (arg, arg_end - arg);
> -  cleanup = make_cleanup (xfree, arg);
> +  std::string copy (arg, arg_end - arg);
> +  arg = &copy[0];
>  
>    /* Extract each word from the argument, separated by ":"s.  */
>    p = strchr (arg, ':');
> @@ -183,17 +182,12 @@ parse_probes (const struct event_location *location,
>  
>    if (canonical)
>      {
> -      char *canon;
> -
> -      canon = savestring (arg_start, arg_end - arg_start);
> -      make_cleanup (xfree, canon);
> +      std::string canon (arg_start, arg_end - arg_start);
>        canonical->special_display = 1;
>        canonical->pre_expanded = 1;
> -      canonical->location = new_probe_location (canon);
> +      canonical->location = new_probe_location (canon.c_str ());
>      }
>  
> -  do_cleanups (cleanup);
> -
>    return result;
>  }
>  
> @@ -548,7 +542,6 @@ info_probes_for_ops (const char *arg, int from_tty,
>  		     const struct probe_ops *pops)
>  {
>    std::string provider, probe_name, objname;
> -  struct cleanup *cleanup = make_cleanup (null_cleanup, NULL);
>    int any_found;
>    int ui_out_extra_fields = 0;
>    size_t size_addr;
> @@ -657,7 +650,6 @@ info_probes_for_ops (const char *arg, int from_tty,
>  
>      any_found = !probes.empty ();
>    }
> -  do_cleanups (cleanup);
>  
>    if (!any_found)
>      current_uiout->message (_("No probes matched.\n"));
> @@ -677,7 +669,6 @@ static void
>  enable_probes_command (const char *arg, int from_tty)
>  {
>    std::string provider, probe_name, objname;
> -  struct cleanup *cleanup = make_cleanup (null_cleanup, NULL);
>  
>    parse_probe_linespec ((const char *) arg, &provider, &probe_name, &objname);
>  
> @@ -686,7 +677,6 @@ enable_probes_command (const char *arg, int from_tty)
>    if (probes.empty ())
>      {
>        current_uiout->message (_("No probes matched.\n"));
> -      do_cleanups (cleanup);
>        return;
>      }
>  
> @@ -706,8 +696,6 @@ enable_probes_command (const char *arg, int from_tty)
>  	current_uiout->message (_("Probe %s:%s cannot be enabled.\n"),
>  				probe.probe->provider, probe.probe->name);
>      }
> -
> -  do_cleanups (cleanup);
>  }
>  
>  /* Implementation of the `disable probes' command.  */
> @@ -716,7 +704,6 @@ static void
>  disable_probes_command (const char *arg, int from_tty)
>  {
>    std::string provider, probe_name, objname;
> -  struct cleanup *cleanup = make_cleanup (null_cleanup, NULL);
>  
>    parse_probe_linespec ((const char *) arg, &provider, &probe_name, &objname);
>  
> @@ -725,7 +712,6 @@ disable_probes_command (const char *arg, int from_tty)
>    if (probes.empty ())
>      {
>        current_uiout->message (_("No probes matched.\n"));
> -      do_cleanups (cleanup);
>        return;
>      }
>  
> @@ -745,8 +731,6 @@ disable_probes_command (const char *arg, int from_tty)
>  	current_uiout->message (_("Probe %s:%s cannot be disabled.\n"),
>  				probe.probe->provider, probe.probe->name);
>      }
> -
> -  do_cleanups (cleanup);
>  }
>  
>  /* See comments in probe.h.  */
> 


LGTM.