aboutsummaryrefslogtreecommitdiff
path: root/gdb/osdata.c
blob: 7b5c20a8ca92fd2e579d1faef1d3d8c9ce2ed41f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
/* Routines for handling XML generic OS data provided by target.

   Copyright (C) 2008-2020 Free Software Foundation, Inc.

   This file is part of GDB.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

#include "defs.h"
#include "target.h"
#include "xml-support.h"
#include "osdata.h"
#include "ui-out.h"
#include "gdbcmd.h"

#if !defined(HAVE_LIBEXPAT)

std::unique_ptr<osdata>
osdata_parse (const char *xml)
{
  static int have_warned;

  if (!have_warned)
    {
      have_warned = 1;
      warning (_("Can not parse XML OS data; XML support was disabled "
		"at compile time"));
    }

  return NULL;
}

#else /* HAVE_LIBEXPAT */

/* Internal parsing data passed to all XML callbacks.  */
struct osdata_parsing_data
{
  std::unique_ptr<struct osdata> osdata;
  std::string property_name;
};

/* Handle the start of a <osdata> element.  */

static void
osdata_start_osdata (struct gdb_xml_parser *parser,
			const struct gdb_xml_element *element,
			void *user_data,
			std::vector<gdb_xml_value> &attributes)
{
  struct osdata_parsing_data *data = (struct osdata_parsing_data *) user_data;

  if (data->osdata != NULL)
    gdb_xml_error (parser, _("Seen more than on osdata element"));

  char *type = (char *) xml_find_attribute (attributes, "type")->value.get ();
  data->osdata.reset (new struct osdata (std::string (type)));
}

/* Handle the start of a <item> element.  */

static void
osdata_start_item (struct gdb_xml_parser *parser,
		  const struct gdb_xml_element *element,
		  void *user_data,
		  std::vector<gdb_xml_value> &attributes)
{
  struct osdata_parsing_data *data = (struct osdata_parsing_data *) user_data;
  data->osdata->items.emplace_back ();
}

/* Handle the start of a <column> element.  */

static void
osdata_start_column (struct gdb_xml_parser *parser,
		    const struct gdb_xml_element *element,
		    void *user_data,
		    std::vector<gdb_xml_value> &attributes)
{
  struct osdata_parsing_data *data = (struct osdata_parsing_data *) user_data;
  const char *name
    = (const char *) xml_find_attribute (attributes, "name")->value.get ();

  data->property_name.assign (name);
}

/* Handle the end of a <column> element.  */

static void
osdata_end_column (struct gdb_xml_parser *parser,
		  const struct gdb_xml_element *element,
		  void *user_data, const char *body_text)
{
  osdata_parsing_data *data = (struct osdata_parsing_data *) user_data;
  struct osdata *osdata = data->osdata.get ();
  osdata_item &item = osdata->items.back ();

  item.columns.emplace_back (std::move (data->property_name),
			     std::string (body_text));
}

/* The allowed elements and attributes for OS data object.
   The root element is a <osdata>.  */

const struct gdb_xml_attribute column_attributes[] = {
  { "name", GDB_XML_AF_NONE, NULL, NULL },
  { NULL, GDB_XML_AF_NONE, NULL, NULL }
};

const struct gdb_xml_element item_children[] = {
  { "column", column_attributes, NULL,
    GDB_XML_EF_REPEATABLE | GDB_XML_EF_OPTIONAL,
    osdata_start_column, osdata_end_column },
  { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
};

const struct gdb_xml_attribute osdata_attributes[] = {
  { "type", GDB_XML_AF_NONE, NULL, NULL },
  { NULL, GDB_XML_AF_NONE, NULL, NULL }
};

const struct gdb_xml_element osdata_children[] = {
  { "item", NULL, item_children,
    GDB_XML_EF_REPEATABLE | GDB_XML_EF_OPTIONAL,
    osdata_start_item, NULL },
  { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
};

const struct gdb_xml_element osdata_elements[] = {
  { "osdata", osdata_attributes, osdata_children,
    GDB_XML_EF_NONE, osdata_start_osdata, NULL },
  { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
};

std::unique_ptr<osdata>
osdata_parse (const char *xml)
{
  osdata_parsing_data data;

  if (gdb_xml_parse_quick (_("osdata"), "osdata.dtd",
			   osdata_elements, xml, &data) == 0)
    {
      /* Parsed successfully, don't need to delete the result.  */
      return std::move (data.osdata);
    }

  return NULL;
}
#endif

std::unique_ptr<osdata>
get_osdata (const char *type)
{
  std::unique_ptr<osdata> osdata;
  gdb::optional<gdb::char_vector> xml = target_get_osdata (type);

  if (xml)
    {
      if ((*xml)[0] == '\0')
	{
	  if (type)
	    warning (_("Empty data returned by target.  Wrong osdata type?"));
	  else
	    warning (_("Empty type list returned by target.  No type data?"));
	}
      else
	osdata = osdata_parse (xml->data ());
    }

  if (osdata == NULL)
    error (_("Can not fetch data now."));

  return osdata;
}

const std::string *
get_osdata_column (const osdata_item &item, const char *name)
{
  for (const osdata_column &col : item.columns)
    if (col.name == name)
      return &col.value;

  return NULL;
}

void
info_osdata (const char *type)
{
  struct ui_out *uiout = current_uiout;
  struct osdata_item *last = NULL;
  int ncols = 0;
  int col_to_skip = -1;

  if (type == NULL)
    type = "";

  std::unique_ptr<osdata> osdata = get_osdata (type);

  int nrows = osdata->items.size ();

  if (*type == '\0' && nrows == 0)
    error (_("Available types of OS data not reported."));
  
  if (!osdata->items.empty ())
    {
      last = &osdata->items.back ();
      ncols = last->columns.size ();

      /* As a special case, scan the listing of available data types
	 for a column named "Title", and only include it with MI
	 output; this column's normal use is for titles for interface
	 elements like menus, and it clutters up CLI output.  */
      if (*type == '\0' && !uiout->is_mi_like_p ())
	{
	  for (int ix = 0; ix < last->columns.size (); ix++)
	    {
	      if (last->columns[ix].name == "Title")
		col_to_skip = ix;
	    }
	  /* Be sure to reduce the total column count, otherwise
	     internal errors ensue.  */
	  if (col_to_skip >= 0)
	    --ncols;
	}
    }

  ui_out_emit_table table_emitter (uiout, ncols, nrows, "OSDataTable");

  /* With no columns/items, we just output an empty table, but we
     still output the table.  This matters for MI.  */
  if (ncols == 0)
    return;

  if (last != NULL && !last->columns.empty ())
    {
      for (int ix = 0; ix < last->columns.size (); ix++)
	{
	  char col_name[32];

	  if (ix == col_to_skip)
	    continue;

	  snprintf (col_name, 32, "col%d", ix);
	  uiout->table_header (10, ui_left,
			       col_name, last->columns[ix].name.c_str ());
	}
    }

  uiout->table_body ();

  if (nrows != 0)
    {
      for (const osdata_item &item : osdata->items)
       {
	 {
	   ui_out_emit_tuple tuple_emitter (uiout, "item");

	   for (int ix_cols = 0; ix_cols < item.columns.size (); ix_cols++)
	     {
	       char col_name[32];

	       if (ix_cols == col_to_skip)
		 continue;

	       snprintf (col_name, 32, "col%d", ix_cols);
	       uiout->field_string (col_name,
				    item.columns[ix_cols].value.c_str ());
	     }
	 }

	 uiout->text ("\n");
       }
    }
}

static void
info_osdata_command (const char *arg, int from_tty)
{
  info_osdata (arg);
}

void _initialize_osdata ();
void
_initialize_osdata ()
{
  add_info ("os", info_osdata_command,
	   _("Show OS data ARG."));
}