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- /* Routines for handling XML generic OS data provided by target.
- Copyright (C) 2008-2022 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);
- }
- }
- 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."));
- }
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