Re: [PATCH] store trace default-collect to target [3/6] tfile

[Hui Zhu <teawater@gmail.com>]

Ping http://sourceware.org/ml/gdb-patches/2013-04/msg00502.html

Thanks,
Hui

On Wed, Apr 17, 2013 at 9:58 AM, Yao Qi <yao@codesourcery.com> wrote:
> On 04/16/2013 05:30 PM, Hui Zhu wrote:
>> The old patch cannot patch to the upstream, so post a new version for that.
>>
>> Thanks,
>> Hui
>>
>> 2013-04-16  Hui Zhu<hui@codesourcery.com>
>>
>> * ctf.c (ctf_write_default_collect): New.
>> (trace_file_write_ops): Add ctf_write_default_collect.
>> * tracepoint.c (tfile_write_default_collect): New.
>> (trace_file_write_ops): Add tfile_write_default_collect.
>> (trace_save): Call writer->ops->write_default_collect.
>> (tfile_interp_line): Add collectp.
>> (tfile_open): Add support of default collect.
>> * tracepoint.h (trace_file_write_ops): Add write_default_collect.
>
> Hui, it is pity (again) to see you didn't incorporate my ctf part into
> this patch, so I did it for you.
>
> --
> Yao (齐尧)
>
> gdb:
>
> 2013-04-17  Hui Zhu  <hui@codesourcery.com>
>             Yao Qi  <yao@codesourcery.com>
>
>         * ctf.c (CTF_EVENT_ID_DEFAULT_COLLECT): New macro.
>         (ctf_write_header): Write metadata for "default-collect"
>         action.
>         (ctf_write_default_collect): New.
>         (trace_file_write_ops): Add ctf_write_default_collect.
>         (ctf_read_default_collect): New.
>         (ctf_open): Call ctf_read_default_collect.
>         * tracepoint.c (tfile_write_default_collect): New.
>         (trace_file_write_ops): Add tfile_write_default_collect.
>         (trace_save): Call writer->ops->write_default_collect.
>         (tfile_interp_line): Add parameter 'collectp'.
>         (tfile_open): Add support of default collect.
>         * tracepoint.h (trace_file_write_ops) <write_default_collect>:
>         New.
> ---
>  gdb/ctf.c        |   68 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
>  gdb/tracepoint.c |   32 +++++++++++++++++++++++--
>  gdb/tracepoint.h |    4 +++
>  3 files changed, 101 insertions(+), 3 deletions(-)
>
> diff --git a/gdb/ctf.c b/gdb/ctf.c
> index b8252e4..413ce52 100644
> --- a/gdb/ctf.c
> +++ b/gdb/ctf.c
> @@ -75,6 +75,7 @@
>  #define CTF_EVENT_ID_STATUS 4
>  #define CTF_EVENT_ID_TSV_DEF 5
>  #define CTF_EVENT_ID_TP_DEF 6
> +#define CTF_EVENT_ID_DEFAULT_COLLECT 7
>
>  /* The state kept while writing the CTF datastream file.  */
>
> @@ -429,6 +430,16 @@ ctf_write_header (struct trace_file_writer *self)
>                           "\t};\n"
>                           "};\n", CTF_EVENT_ID_TP_DEF);
>
> +  ctf_save_write_metadata (&writer->tcs, "\n");
> +  ctf_save_write_metadata (&writer->tcs,
> +                          "event {\n\tname = \"default_collect\";\n"
> +                          "\tid = %u;\n"
> +                          "\tfields := struct { \n"
> +                          "\t\tchars contents;\n"
> +                          "\t};\n"
> +                          "};\n",
> +                          CTF_EVENT_ID_DEFAULT_COLLECT);
> +
>    gdb_assert (writer->tcs.content_size == 0);
>    gdb_assert (writer->tcs.packet_start == 0);
>
> @@ -617,6 +628,26 @@ ctf_write_uploaded_tp (struct trace_file_writer *self,
>  }
>
>  /* This is the implementation of trace_file_write_ops method
> +   write_default_collect.  */
> +
> +static void
> +ctf_write_default_collect (struct trace_file_writer *self,
> +                          char *collect)
> +{
> +  struct ctf_trace_file_writer *writer
> +    = (struct ctf_trace_file_writer *) self;
> +  int32_t int32;
> +
> +  /* Event Id.  */
> +  int32 = CTF_EVENT_ID_DEFAULT_COLLECT;
> +  ctf_save_align_write (&writer->tcs, (gdb_byte *) &int32, 4, 4);
> +
> +  /* Contents.  */
> +  ctf_save_write (&writer->tcs, collect, strlen (collect) + 1);
> +
> +}
> +
> +/* This is the implementation of trace_file_write_ops method
>     write_definition_end.  */
>
>  static void
> @@ -848,6 +879,7 @@ static const struct trace_file_write_ops ctf_write_ops =
>    ctf_write_status,
>    ctf_write_uploaded_tsv,
>    ctf_write_uploaded_tp,
> +  ctf_write_default_collect,
>    ctf_write_definition_end,
>    NULL,
>    &ctf_write_frame_ops,
> @@ -1138,6 +1170,40 @@ ctf_read_tp (struct uploaded_tp **uploaded_tps)
>      }
>  }
>
> +/* Read a CTF event on "default-collect" and update the
> +   "default-collect" action.  */
> +
> +static void
> +ctf_read_default_collect (void)
> +{
> +  struct bt_ctf_event *event;
> +  const struct bt_definition *scope;
> +  uint32_t u32;
> +  char *default_collect;
> +
> +  event = bt_ctf_iter_read_event (ctf_iter);
> +  scope = bt_ctf_get_top_level_scope (event,
> +                                     BT_STREAM_EVENT_HEADER);
> +  u32 = bt_ctf_get_uint64 (bt_ctf_get_field (event, scope,
> +                                            "id"));
> +
> +  if (u32 != CTF_EVENT_ID_DEFAULT_COLLECT)
> +    error (_("Wrong event id!"));
> +
> +  scope = bt_ctf_get_top_level_scope (event, BT_EVENT_FIELDS);
> +  default_collect
> +    = bt_ctf_get_string (bt_ctf_get_field (event, scope, "contents"));
> +
> +  if (default_collect == NULL)
> +    default_collect = xstrdup ("");
> +  else
> +    default_collect = xstrdup (default_collect);
> +
> +  trace_set_default_collect (default_collect);
> +
> +  bt_iter_next (bt_ctf_get_iter (ctf_iter));
> +}
> +
>  /* This is the implementation of target_ops method to_open.  Open CTF
>     trace data, read trace status, trace state variables and tracepoint
>     definitions from the first packet.  Set the start position at the
> @@ -1179,6 +1245,8 @@ ctf_open (char *dirname, int from_tty)
>
>    ctf_read_tp (&uploaded_tps);
>
> +  ctf_read_default_collect ();
> +
>    event = bt_ctf_iter_read_event (ctf_iter);
>    /* EVENT can be NULL if we've already gone to the end of stream of
>       events.  */
> diff --git a/gdb/tracepoint.c b/gdb/tracepoint.c
> index c1c4d8f..b2ce6f4 100644
> --- a/gdb/tracepoint.c
> +++ b/gdb/tracepoint.c
> @@ -3237,6 +3237,19 @@ tfile_write_uploaded_tp (struct trace_file_writer *self,
>  }
>
>  /* This is the implementation of trace_file_write_ops method
> +   write_default_collect.  */
> +
> +static void
> +tfile_write_default_collect (struct trace_file_writer *self,
> +                            char *collect)
> +{
> +  struct tfile_trace_file_writer *writer
> +    = (struct tfile_trace_file_writer *) self;
> +
> +  fprintf (writer->fp, "dc %s\n", collect);
> +}
> +
> +/* This is the implementation of trace_file_write_ops method
>     write_definition_end.  */
>
>  static void
> @@ -3289,6 +3302,7 @@ static const struct trace_file_write_ops tfile_write_ops =
>    tfile_write_status,
>    tfile_write_uploaded_tsv,
>    tfile_write_uploaded_tp,
> +  tfile_write_default_collect,
>    tfile_write_definition_end,
>    tfile_write_raw_data,
>    NULL,
> @@ -3378,6 +3392,8 @@ trace_save (const char *filename, struct trace_file_writer *writer,
>    for (utp = uploaded_tps; utp; utp = utp->next)
>      writer->ops->write_uploaded_tp (writer, utp);
>
> +  writer->ops->write_default_collect (writer, default_collect);
> +
>    free_uploaded_tps (&uploaded_tps);
>
>    /* Mark the end of the definition section.  */
> @@ -4147,7 +4163,8 @@ int trace_regblock_size;
>
>  static void tfile_interp_line (char *line,
>                                struct uploaded_tp **utpp,
> -                              struct uploaded_tsv **utsvp);
> +                              struct uploaded_tsv **utsvp,
> +                              char **collectp);
>
>  /* Read SIZE bytes into READBUF from the trace frame, starting at
>     TRACE_FD's current position.  Note that this call `read'
> @@ -4182,6 +4199,7 @@ tfile_open (char *filename, int from_tty)
>    struct trace_status *ts;
>    struct uploaded_tp *uploaded_tps = NULL;
>    struct uploaded_tsv *uploaded_tsvs = NULL;
> +  char *uploaded_default_collect = NULL;
>
>    target_preopen (from_tty);
>    if (!filename)
> @@ -4251,7 +4269,8 @@ tfile_open (char *filename, int from_tty)
>                 break;
>               linebuf[i] = '\0';
>               i = 0;
> -             tfile_interp_line (linebuf, &uploaded_tps, &uploaded_tsvs);
> +             tfile_interp_line (linebuf, &uploaded_tps, &uploaded_tsvs,
> +                                &uploaded_default_collect);
>             }
>           else
>             linebuf[i++] = byte;
> @@ -4289,6 +4308,8 @@ tfile_open (char *filename, int from_tty)
>
>    merge_uploaded_tracepoints (&uploaded_tps);
>
> +  trace_set_default_collect (uploaded_default_collect);
> +
>    post_create_inferior (&tfile_ops, from_tty);
>  }
>
> @@ -4297,7 +4318,7 @@ tfile_open (char *filename, int from_tty)
>
>  static void
>  tfile_interp_line (char *line, struct uploaded_tp **utpp,
> -                  struct uploaded_tsv **utsvp)
> +                  struct uploaded_tsv **utsvp, char **collectp)
>  {
>    char *p = line;
>
> @@ -4321,6 +4342,11 @@ tfile_interp_line (char *line, struct uploaded_tp **utpp,
>        p += strlen ("tsv ");
>        parse_tsv_definition (p, utsvp);
>      }
> +  else if (strncmp (p, "dc ", strlen ("dc ")) == 0)
> +    {
> +      p += strlen ("dc ");
> +      *collectp = xstrdup (p);
> +    }
>    else
>      warning (_("Ignoring trace file definition \"%s\""), line);
>  }
> diff --git a/gdb/tracepoint.h b/gdb/tracepoint.h
> index 3bf8d8f..cc38121 100644
> --- a/gdb/tracepoint.h
> +++ b/gdb/tracepoint.h
> @@ -296,6 +296,10 @@ struct trace_file_write_ops
>    void (*write_uploaded_tp) (struct trace_file_writer *self,
>                              struct uploaded_tp *tp);
>
> +  /* Write the tracepoint default collect.  */
> +  void (*write_default_collect) (struct trace_file_writer *self,
> +                                char *collect);
> +
>    /* Write to mark the end of the definition part.  */
>    void (*write_definition_end) (struct trace_file_writer *self);
>
> --
> 1.7.7.6