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gdb: New maint info line-table command.

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Add a new command 'maint info line-table' to display the contents of
GDB's internal line table structure.  Useful when trying to understand
problems (within gdb) relating to line tables.

gdb/ChangeLog:

	* symmisc.c (maintenance_info_line_tables): New function.
	(maintenance_print_one_line_table): New function.
	(_initialize_symmisc): Register 'maint info line-table' command.
	* NEWS: Mention new command.

gdb/doc/ChangeLog:

	* gdb.texinfo (Symbols): Document new 'maint info line-table'
	command.

gdb/testsuite/ChangeLog:

	* gdb.base/maint.exp: New tests for 'maint info line-table'.
This commit is contained in:
Andrew Burgess
2016-01-21 11:03:32 +01:00
parent c4b3e547d5
commit f2403c3934
7 changed files with 138 additions and 0 deletions
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90
gdb/symmisc.c
View File

@ -949,6 +949,90 @@ block_depth (struct block *block)
}
/* Used by MAINTENANCE_INFO_LINE_TABLES to print the information about a
single line table. */
static int
maintenance_print_one_line_table (struct symtab *symtab, void *data)
{
struct linetable *linetable;
struct objfile *objfile;
objfile = symtab->compunit_symtab->objfile;
printf_filtered (_("objfile: %s ((struct objfile *) %s)\n"),
objfile_name (objfile),
host_address_to_string (objfile));
printf_filtered (_("compunit_symtab: ((struct compunit_symtab *) %s)\n"),
host_address_to_string (symtab->compunit_symtab));
printf_filtered (_("symtab: %s ((struct symtab *) %s)\n"),
symtab_to_fullname (symtab),
host_address_to_string (symtab));
linetable = SYMTAB_LINETABLE (symtab);
printf_filtered (_("linetable: ((struct linetable *) %s):\n"),
host_address_to_string (linetable));
if (linetable == NULL)
printf_filtered (_("No line table.\n"));
else if (linetable->nitems <= 0)
printf_filtered (_("Line table has no lines.\n"));
else
{
int i;
/* Leave space for 6 digits of index and line number. After that the
tables will just not format as well. */
printf_filtered (_("%-6s %6s %s\n"),
_("INDEX"), _("LINE"), _("ADDRESS"));
for (i = 0; i < linetable->nitems; ++i)
{
struct linetable_entry *item;
struct cleanup *row_cleanup;
item = &linetable->item [i];
printf_filtered (_("%-6d %6d %s\n"), i, item->line,
core_addr_to_string (item->pc));
}
}
return 0;
}
/* Implement the 'maint info line-table' command. */
static void
maintenance_info_line_tables (char *regexp, int from_tty)
{
struct program_space *pspace;
struct objfile *objfile;
dont_repeat ();
if (regexp != NULL)
re_comp (regexp);
ALL_PSPACES (pspace)
ALL_PSPACE_OBJFILES (pspace, objfile)
{
struct compunit_symtab *cust;
struct symtab *symtab;
ALL_OBJFILE_COMPUNITS (objfile, cust)
{
ALL_COMPUNIT_FILETABS (cust, symtab)
{
QUIT;
if (regexp == NULL
|| re_exec (symtab_to_filename_for_display (symtab)))
maintenance_print_one_line_table (symtab, NULL);
}
}
}
}
/* Do early runtime initializations. */
void
@ -982,6 +1066,12 @@ linetables --- just the symbol table structures themselves.\n\
With an argument REGEXP, list the symbol tables with matching names."),
&maintenanceinfolist);
add_cmd ("line-table", class_maintenance, maintenance_info_line_tables, _("\
List the contents of all line tables, from all symbol tables.\n\
With an argument REGEXP, list just the line tables for the symbol\n\
tables with matching names."),
&maintenanceinfolist);
add_cmd ("check-symtabs", class_maintenance, maintenance_check_symtabs,
_("\
Check consistency of currently expanded symtabs."),