| 1 | /* Routines for handling XML generic OS data provided by target. |
| 2 | |
| 3 | Copyright (C) 2008, 2009, 2010 Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of GDB. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 3 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 19 | |
| 20 | #include "defs.h" |
| 21 | #include "target.h" |
| 22 | #include "vec.h" |
| 23 | #include "xml-support.h" |
| 24 | #include "osdata.h" |
| 25 | #include "gdb_string.h" |
| 26 | #include "ui-out.h" |
| 27 | #include "gdbcmd.h" |
| 28 | |
| 29 | #if !defined(HAVE_LIBEXPAT) |
| 30 | |
| 31 | struct osdata * |
| 32 | osdata_parse (const char *xml) |
| 33 | { |
| 34 | static int have_warned; |
| 35 | |
| 36 | if (!have_warned) |
| 37 | { |
| 38 | have_warned = 1; |
| 39 | warning (_("Can not parse XML OS data; XML support was disabled " |
| 40 | "at compile time")); |
| 41 | } |
| 42 | |
| 43 | return NULL; |
| 44 | } |
| 45 | |
| 46 | #else /* HAVE_LIBEXPAT */ |
| 47 | |
| 48 | #include "xml-support.h" |
| 49 | |
| 50 | /* Internal parsing data passed to all XML callbacks. */ |
| 51 | struct osdata_parsing_data |
| 52 | { |
| 53 | struct osdata *osdata; |
| 54 | char *property_name; |
| 55 | }; |
| 56 | |
| 57 | /* Handle the start of a <osdata> element. */ |
| 58 | |
| 59 | static void |
| 60 | osdata_start_osdata (struct gdb_xml_parser *parser, |
| 61 | const struct gdb_xml_element *element, |
| 62 | void *user_data, VEC(gdb_xml_value_s) *attributes) |
| 63 | { |
| 64 | struct osdata_parsing_data *data = user_data; |
| 65 | char *type; |
| 66 | struct osdata *osdata; |
| 67 | |
| 68 | if (data->osdata) |
| 69 | gdb_xml_error (parser, _("Seen more than on osdata element")); |
| 70 | |
| 71 | type = VEC_index (gdb_xml_value_s, attributes, 0)->value; |
| 72 | osdata = XZALLOC (struct osdata); |
| 73 | osdata->type = xstrdup (type); |
| 74 | data->osdata = osdata; |
| 75 | } |
| 76 | |
| 77 | /* Handle the start of a <item> element. */ |
| 78 | |
| 79 | static void |
| 80 | osdata_start_item (struct gdb_xml_parser *parser, |
| 81 | const struct gdb_xml_element *element, |
| 82 | void *user_data, VEC(gdb_xml_value_s) *attributes) |
| 83 | { |
| 84 | struct osdata_parsing_data *data = user_data; |
| 85 | struct osdata_item item = { NULL }; |
| 86 | VEC_safe_push (osdata_item_s, data->osdata->items, &item); |
| 87 | } |
| 88 | |
| 89 | /* Handle the start of a <column> element. */ |
| 90 | |
| 91 | static void |
| 92 | osdata_start_column (struct gdb_xml_parser *parser, |
| 93 | const struct gdb_xml_element *element, |
| 94 | void *user_data, VEC(gdb_xml_value_s) *attributes) |
| 95 | { |
| 96 | struct osdata_parsing_data *data = user_data; |
| 97 | const char *name = VEC_index (gdb_xml_value_s, attributes, 0)->value; |
| 98 | data->property_name = xstrdup (name); |
| 99 | } |
| 100 | |
| 101 | /* Handle the end of a <column> element. */ |
| 102 | |
| 103 | static void |
| 104 | osdata_end_column (struct gdb_xml_parser *parser, |
| 105 | const struct gdb_xml_element *element, |
| 106 | void *user_data, const char *body_text) |
| 107 | { |
| 108 | struct osdata_parsing_data *data = user_data; |
| 109 | struct osdata *osdata = data->osdata; |
| 110 | struct osdata_item *item = VEC_last (osdata_item_s, osdata->items); |
| 111 | struct osdata_column *col = VEC_safe_push (osdata_column_s, |
| 112 | item->columns, NULL); |
| 113 | |
| 114 | /* Transfer memory ownership. NAME was already strdup'ed. */ |
| 115 | col->name = data->property_name; |
| 116 | col->value = xstrdup (body_text); |
| 117 | data->property_name = NULL; |
| 118 | } |
| 119 | |
| 120 | /* Discard the constructed osdata (if an error occurs). */ |
| 121 | |
| 122 | static void |
| 123 | clear_parsing_data (void *p) |
| 124 | { |
| 125 | struct osdata_parsing_data *data = p; |
| 126 | osdata_free (data->osdata); |
| 127 | data->osdata = NULL; |
| 128 | xfree (data->property_name); |
| 129 | data->property_name = NULL; |
| 130 | } |
| 131 | |
| 132 | /* The allowed elements and attributes for OS data object. |
| 133 | The root element is a <osdata>. */ |
| 134 | |
| 135 | const struct gdb_xml_attribute column_attributes[] = { |
| 136 | { "name", GDB_XML_AF_NONE, NULL, NULL }, |
| 137 | { NULL, GDB_XML_AF_NONE, NULL, NULL } |
| 138 | }; |
| 139 | |
| 140 | const struct gdb_xml_element item_children[] = { |
| 141 | { "column", column_attributes, NULL, |
| 142 | GDB_XML_EF_REPEATABLE | GDB_XML_EF_OPTIONAL, |
| 143 | osdata_start_column, osdata_end_column }, |
| 144 | { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL } |
| 145 | }; |
| 146 | |
| 147 | const struct gdb_xml_attribute osdata_attributes[] = { |
| 148 | { "type", GDB_XML_AF_NONE, NULL, NULL }, |
| 149 | { NULL, GDB_XML_AF_NONE, NULL, NULL } |
| 150 | }; |
| 151 | |
| 152 | const struct gdb_xml_element osdata_children[] = { |
| 153 | { "item", NULL, item_children, |
| 154 | GDB_XML_EF_REPEATABLE | GDB_XML_EF_OPTIONAL, |
| 155 | osdata_start_item, NULL }, |
| 156 | { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL } |
| 157 | }; |
| 158 | |
| 159 | const struct gdb_xml_element osdata_elements[] = { |
| 160 | { "osdata", osdata_attributes, osdata_children, |
| 161 | GDB_XML_EF_NONE, osdata_start_osdata, NULL }, |
| 162 | { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL } |
| 163 | }; |
| 164 | |
| 165 | struct osdata * |
| 166 | osdata_parse (const char *xml) |
| 167 | { |
| 168 | struct gdb_xml_parser *parser; |
| 169 | struct cleanup *before_deleting_result, *back_to; |
| 170 | struct osdata_parsing_data data = { NULL }; |
| 171 | |
| 172 | back_to = make_cleanup (null_cleanup, NULL); |
| 173 | parser = gdb_xml_create_parser_and_cleanup (_("osdata"), |
| 174 | osdata_elements, &data); |
| 175 | gdb_xml_use_dtd (parser, "osdata.dtd"); |
| 176 | |
| 177 | before_deleting_result = make_cleanup (clear_parsing_data, &data); |
| 178 | |
| 179 | if (gdb_xml_parse (parser, xml) == 0) |
| 180 | /* Parsed successfully, don't need to delete the result. */ |
| 181 | discard_cleanups (before_deleting_result); |
| 182 | |
| 183 | do_cleanups (back_to); |
| 184 | return data.osdata; |
| 185 | } |
| 186 | #endif |
| 187 | |
| 188 | static void |
| 189 | osdata_item_clear (struct osdata_item *item) |
| 190 | { |
| 191 | if (item->columns != NULL) |
| 192 | { |
| 193 | struct osdata_column *col; |
| 194 | int ix; |
| 195 | for (ix = 0; |
| 196 | VEC_iterate (osdata_column_s, item->columns, |
| 197 | ix, col); |
| 198 | ix++) |
| 199 | { |
| 200 | xfree (col->name); |
| 201 | xfree (col->value); |
| 202 | } |
| 203 | VEC_free (osdata_column_s, item->columns); |
| 204 | item->columns = NULL; |
| 205 | } |
| 206 | } |
| 207 | |
| 208 | void |
| 209 | osdata_free (struct osdata *osdata) |
| 210 | { |
| 211 | if (osdata == NULL) |
| 212 | return; |
| 213 | |
| 214 | if (osdata->items != NULL) |
| 215 | { |
| 216 | struct osdata_item *item; |
| 217 | int ix; |
| 218 | for (ix = 0; |
| 219 | VEC_iterate (osdata_item_s, osdata->items, |
| 220 | ix, item); |
| 221 | ix++) |
| 222 | osdata_item_clear (item); |
| 223 | VEC_free (osdata_item_s, osdata->items); |
| 224 | } |
| 225 | |
| 226 | xfree (osdata); |
| 227 | } |
| 228 | |
| 229 | static void |
| 230 | osdata_free_cleanup (void *arg) |
| 231 | { |
| 232 | struct osdata *osdata = arg; |
| 233 | osdata_free (osdata); |
| 234 | } |
| 235 | |
| 236 | struct cleanup * |
| 237 | make_cleanup_osdata_free (struct osdata *data) |
| 238 | { |
| 239 | return make_cleanup (osdata_free_cleanup, data); |
| 240 | } |
| 241 | |
| 242 | struct osdata * |
| 243 | get_osdata (const char *type) |
| 244 | { |
| 245 | struct osdata *osdata = NULL; |
| 246 | char *xml = target_get_osdata (type); |
| 247 | if (xml) |
| 248 | { |
| 249 | struct cleanup *old_chain = make_cleanup (xfree, xml); |
| 250 | |
| 251 | if (xml[0] == '\0') |
| 252 | warning (_("Empty data returned by target. Wrong osdata type?")); |
| 253 | else |
| 254 | osdata = osdata_parse (xml); |
| 255 | |
| 256 | do_cleanups (old_chain); |
| 257 | } |
| 258 | |
| 259 | if (!osdata) |
| 260 | error (_("Can not fetch data now.\n")); |
| 261 | |
| 262 | return osdata; |
| 263 | } |
| 264 | |
| 265 | const char * |
| 266 | get_osdata_column (struct osdata_item *item, const char *name) |
| 267 | { |
| 268 | struct osdata_column *col; |
| 269 | int ix_cols; |
| 270 | |
| 271 | for (ix_cols = 0; |
| 272 | VEC_iterate (osdata_column_s, item->columns, |
| 273 | ix_cols, col); |
| 274 | ix_cols++) |
| 275 | if (strcmp (col->name, name) == 0) |
| 276 | return col->value; |
| 277 | |
| 278 | return NULL; |
| 279 | } |
| 280 | |
| 281 | static void |
| 282 | info_osdata_command (char *type, int from_tty) |
| 283 | { |
| 284 | struct osdata *osdata = NULL; |
| 285 | struct osdata_item *last; |
| 286 | struct cleanup *old_chain; |
| 287 | int ncols; |
| 288 | int nprocs; |
| 289 | |
| 290 | if (type == 0) |
| 291 | /* TODO: No type could mean "list availables types". */ |
| 292 | error (_("Argument required.")); |
| 293 | |
| 294 | osdata = get_osdata (type); |
| 295 | old_chain = make_cleanup_osdata_free (osdata); |
| 296 | |
| 297 | nprocs = VEC_length (osdata_item_s, osdata->items); |
| 298 | |
| 299 | last = VEC_last (osdata_item_s, osdata->items); |
| 300 | if (last && last->columns) |
| 301 | ncols = VEC_length (osdata_column_s, last->columns); |
| 302 | else |
| 303 | ncols = 0; |
| 304 | |
| 305 | make_cleanup_ui_out_table_begin_end (uiout, ncols, nprocs, |
| 306 | "OSDataTable"); |
| 307 | |
| 308 | if (last && last->columns) |
| 309 | { |
| 310 | struct osdata_column *col; |
| 311 | int ix; |
| 312 | for (ix = 0; |
| 313 | VEC_iterate (osdata_column_s, last->columns, |
| 314 | ix, col); |
| 315 | ix++) |
| 316 | ui_out_table_header (uiout, 10, ui_left, |
| 317 | col->name, col->name); |
| 318 | } |
| 319 | |
| 320 | ui_out_table_body (uiout); |
| 321 | |
| 322 | if (nprocs != 0) |
| 323 | { |
| 324 | struct osdata_item *item; |
| 325 | int ix_items; |
| 326 | for (ix_items = 0; |
| 327 | VEC_iterate (osdata_item_s, osdata->items, |
| 328 | ix_items, item); |
| 329 | ix_items++) |
| 330 | { |
| 331 | struct cleanup *old_chain; |
| 332 | struct ui_stream *stb; |
| 333 | int ix_cols; |
| 334 | struct osdata_column *col; |
| 335 | |
| 336 | stb = ui_out_stream_new (uiout); |
| 337 | old_chain = make_cleanup_ui_out_stream_delete (stb); |
| 338 | make_cleanup_ui_out_tuple_begin_end (uiout, "item"); |
| 339 | |
| 340 | for (ix_cols = 0; |
| 341 | VEC_iterate (osdata_column_s, item->columns, |
| 342 | ix_cols, col); |
| 343 | ix_cols++) |
| 344 | ui_out_field_string (uiout, col->name, col->value); |
| 345 | |
| 346 | do_cleanups (old_chain); |
| 347 | |
| 348 | ui_out_text (uiout, "\n"); |
| 349 | } |
| 350 | } |
| 351 | |
| 352 | do_cleanups (old_chain); |
| 353 | } |
| 354 | |
| 355 | extern initialize_file_ftype _initialize_osdata; /* -Wmissing-prototypes */ |
| 356 | |
| 357 | void |
| 358 | _initialize_osdata (void) |
| 359 | { |
| 360 | add_info ("os", info_osdata_command, |
| 361 | _("Show OS data ARG.")); |
| 362 | } |