/* C preprocessor macro expansion commands for GDB.
- Copyright 2002 Free Software Foundation, Inc.
+ Copyright (C) 2002, 2007, 2008, 2009, 2010, 2011
+ Free Software Foundation, Inc.
Contributed by Red Hat, 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 2 of the License, or
+ 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,
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, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "macroscope.h"
#include "command.h"
#include "gdbcmd.h"
+#include "gdb_string.h"
\f
/* The `macro' prefix command. */
struct macro_scope *ms = NULL;
char *expanded = NULL;
struct cleanup *cleanup_chain = make_cleanup (free_current_contents, &ms);
+
make_cleanup (free_current_contents, &expanded);
/* You know, when the user doesn't specify any expression, it would be
return;
}
+/* Outputs the include path of a macro starting at FILE and LINE to STREAM.
+ Care should be taken that this function does not cause any lookups into
+ the splay tree so that it can be safely used while iterating. */
static void
show_pp_source_pos (struct ui_file *stream,
struct macro_source_file *file,
}
}
+/* Outputs a macro for human consumption, detailing the include path
+ and macro definition. NAME is the name of the macro.
+ D the definition. FILE the start of the include path, and LINE the
+ line number in FILE.
+
+ Care should be taken that this function does not cause any lookups into
+ the splay tree so that it can be safely used while iterating. */
+static void
+print_macro_definition (const char *name,
+ const struct macro_definition *d,
+ struct macro_source_file *file,
+ int line)
+{
+ fprintf_filtered (gdb_stdout, "Defined at ");
+ show_pp_source_pos (gdb_stdout, file, line);
+
+ if (line != 0)
+ fprintf_filtered (gdb_stdout, "#define %s", name);
+ else
+ fprintf_filtered (gdb_stdout, "-D%s", name);
+
+ if (d->kind == macro_function_like)
+ {
+ int i;
+
+ fputs_filtered ("(", gdb_stdout);
+ for (i = 0; i < d->argc; i++)
+ {
+ fputs_filtered (d->argv[i], gdb_stdout);
+ if (i + 1 < d->argc)
+ fputs_filtered (", ", gdb_stdout);
+ }
+ fputs_filtered (")", gdb_stdout);
+ }
+
+ if (line != 0)
+ fprintf_filtered (gdb_stdout, " %s\n", d->replacement);
+ else
+ fprintf_filtered (gdb_stdout, "=%s\n", d->replacement);
+}
static void
info_macro_command (char *name, int from_tty)
struct macro_scope *ms = NULL;
struct cleanup *cleanup_chain = make_cleanup (free_current_contents, &ms);
struct macro_definition *d;
-
+
if (! name || ! *name)
error (_("You must follow the `info macro' command with the name"
" of the macro\n"
struct macro_source_file *file
= macro_definition_location (ms->file, ms->line, name, &line);
- fprintf_filtered (gdb_stdout, "Defined at ");
- show_pp_source_pos (gdb_stdout, file, line);
- fprintf_filtered (gdb_stdout, "#define %s", name);
- if (d->kind == macro_function_like)
- {
- int i;
-
- fputs_filtered ("(", gdb_stdout);
- for (i = 0; i < d->argc; i++)
- {
- fputs_filtered (d->argv[i], gdb_stdout);
- if (i + 1 < d->argc)
- fputs_filtered (", ", gdb_stdout);
- }
- fputs_filtered (")", gdb_stdout);
- }
- fprintf_filtered (gdb_stdout, " %s\n", d->replacement);
+ print_macro_definition (name, d, file, line);
}
else
{
do_cleanups (cleanup_chain);
}
+/* A callback function for usage with macro_for_each and friends.
+ If USER_DATA is null all macros will be printed.
+ Otherwise USER_DATA is considered to be a string, printing
+ only macros who's NAME matches USER_DATA. Other arguments are
+ routed to print_macro_definition. */
+static void
+print_macro_callback (const char *name, const struct macro_definition *macro,
+ struct macro_source_file *source, int line,
+ void *user_data)
+{
+ if (! user_data || strcmp (user_data, name) == 0)
+ print_macro_definition (name, macro, source, line);
+}
+
+/* Implementation of the "info definitions" command. */
+static void
+info_definitions_command (char *name, int from_tty)
+{
+ struct macro_scope *ms = NULL;
+ struct cleanup *cleanup_chain = make_cleanup (free_current_contents, &ms);
+
+ if (! name || ! *name)
+ error (_("The `info definitions' command requires a macro name as an \
+argument."));
+
+ ms = default_macro_scope ();
+
+ if (! ms || ! ms->file || ! ms->file->table)
+ error (_("GDB has no preprocessor macro information for that code."));
+
+ macro_for_each (ms->file->table, print_macro_callback, name);
+ do_cleanups (cleanup_chain);
+}
+
+/* Implementation of the "info macros" command. */
+static void
+info_macros_command (char *args, int from_tty)
+{
+ struct macro_scope *ms = NULL;
+ struct cleanup *cleanup_chain = make_cleanup (free_current_contents, &ms);
+
+ if (args == NULL)
+ ms = default_macro_scope ();
+ else
+ {
+ struct symtabs_and_lines sals = decode_line_spec (args, 0);
+
+ if (sals.nelts)
+ ms = sal_macro_scope (sals.sals[0]);
+ }
+
+ if (! ms || ! ms->file || ! ms->file->table)
+ error (_("GDB has no preprocessor macro information for that code."));
+
+ macro_for_each_in_scope (ms->file, ms->line, print_macro_callback, NULL);
+ do_cleanups (cleanup_chain);
+}
\f
/* User-defined macros. */
-/* A table of user-defined macros. Unlike the macro tables used for
- symtabs, this one uses xmalloc for all its allocation, not an
- obstack, and it doesn't bcache anything; it just xmallocs things. So
- it's perfectly possible to remove things from this, or redefine
- things. */
-static struct macro_table *user_macros;
+static void
+skip_ws (char **expp)
+{
+ while (macro_is_whitespace (**expp))
+ ++*expp;
+}
+
+/* Try to find the bounds of an identifier. If an identifier is
+ found, returns a newly allocated string; otherwise returns NULL.
+ EXPP is a pointer to an input string; it is updated to point to the
+ text following the identifier. If IS_PARAMETER is true, this
+ function will also allow "..." forms as used in varargs macro
+ parameters. */
+
+static char *
+extract_identifier (char **expp, int is_parameter)
+{
+ char *result;
+ char *p = *expp;
+ unsigned int len;
+
+ if (is_parameter && !strncmp (p, "...", 3))
+ {
+ /* Ok. */
+ }
+ else
+ {
+ if (! *p || ! macro_is_identifier_nondigit (*p))
+ return NULL;
+ for (++p;
+ *p && (macro_is_identifier_nondigit (*p) || macro_is_digit (*p));
+ ++p)
+ ;
+ }
+
+ if (is_parameter && !strncmp (p, "...", 3))
+ p += 3;
+
+ len = p - *expp;
+ result = (char *) xmalloc (len + 1);
+ memcpy (result, *expp, len);
+ result[len] = '\0';
+ *expp += len;
+ return result;
+}
+
+/* Helper function to clean up a temporarily-constructed macro object.
+ This assumes that the contents were all allocated with xmalloc. */
+static void
+free_macro_definition_ptr (void *ptr)
+{
+ int i;
+ struct macro_definition *loc = (struct macro_definition *) ptr;
+
+ for (i = 0; i < loc->argc; ++i)
+ xfree ((char *) loc->argv[i]);
+ xfree ((char *) loc->argv);
+ /* Note that the 'replacement' field is not allocated. */
+}
static void
macro_define_command (char *exp, int from_tty)
{
- error (_("Command not implemented yet."));
+ struct macro_definition new_macro;
+ char *name = NULL;
+ struct cleanup *cleanup_chain;
+
+ if (!exp)
+ error (_("usage: macro define NAME[(ARGUMENT-LIST)] [REPLACEMENT-LIST]"));
+
+ cleanup_chain = make_cleanup (free_macro_definition_ptr, &new_macro);
+ make_cleanup (free_current_contents, &name);
+
+ memset (&new_macro, 0, sizeof (struct macro_definition));
+
+ skip_ws (&exp);
+ name = extract_identifier (&exp, 0);
+ if (! name)
+ error (_("Invalid macro name."));
+ if (*exp == '(')
+ {
+ /* Function-like macro. */
+ int alloced = 5;
+ char **argv = (char **) xmalloc (alloced * sizeof (char *));
+
+ new_macro.kind = macro_function_like;
+ new_macro.argc = 0;
+ new_macro.argv = (const char * const *) argv;
+
+ /* Skip the '(' and whitespace. */
+ ++exp;
+ skip_ws (&exp);
+
+ while (*exp != ')')
+ {
+ int i;
+
+ if (new_macro.argc == alloced)
+ {
+ alloced *= 2;
+ argv = (char **) xrealloc (argv, alloced * sizeof (char *));
+ /* Must update new_macro as well... */
+ new_macro.argv = (const char * const *) argv;
+ }
+ argv[new_macro.argc] = extract_identifier (&exp, 1);
+ if (! argv[new_macro.argc])
+ error (_("Macro is missing an argument."));
+ ++new_macro.argc;
+
+ for (i = new_macro.argc - 2; i >= 0; --i)
+ {
+ if (! strcmp (argv[i], argv[new_macro.argc - 1]))
+ error (_("Two macro arguments with identical names."));
+ }
+
+ skip_ws (&exp);
+ if (*exp == ',')
+ {
+ ++exp;
+ skip_ws (&exp);
+ }
+ else if (*exp != ')')
+ error (_("',' or ')' expected at end of macro arguments."));
+ }
+ /* Skip the closing paren. */
+ ++exp;
+ skip_ws (&exp);
+
+ macro_define_function (macro_main (macro_user_macros), -1, name,
+ new_macro.argc, (const char **) new_macro.argv,
+ exp);
+ }
+ else
+ {
+ skip_ws (&exp);
+ macro_define_object (macro_main (macro_user_macros), -1, name, exp);
+ }
+
+ do_cleanups (cleanup_chain);
}
static void
macro_undef_command (char *exp, int from_tty)
{
- error (_("Command not implemented yet."));
+ char *name;
+
+ if (!exp)
+ error (_("usage: macro undef NAME"));
+
+ skip_ws (&exp);
+ name = extract_identifier (&exp, 0);
+ if (! name)
+ error (_("Invalid macro name."));
+ macro_undef (macro_main (macro_user_macros), -1, name);
+ xfree (name);
}
static void
-macro_list_command (char *exp, int from_tty)
+print_one_macro (const char *name, const struct macro_definition *macro,
+ struct macro_source_file *source, int line,
+ void *ignore)
{
- error (_("Command not implemented yet."));
+ fprintf_filtered (gdb_stdout, "macro define %s", name);
+ if (macro->kind == macro_function_like)
+ {
+ int i;
+
+ fprintf_filtered (gdb_stdout, "(");
+ for (i = 0; i < macro->argc; ++i)
+ fprintf_filtered (gdb_stdout, "%s%s", (i > 0) ? ", " : "",
+ macro->argv[i]);
+ fprintf_filtered (gdb_stdout, ")");
+ }
+ fprintf_filtered (gdb_stdout, " %s\n", macro->replacement);
}
+static void
+macro_list_command (char *exp, int from_tty)
+{
+ macro_for_each (macro_user_macros, print_one_macro, NULL);
+}
+
\f
/* Initializing the `macrocmd' module. */
void
_initialize_macrocmd (void)
{
- struct cmd_list_element *c;
-
/* We introduce a new command prefix, `macro', under which we'll put
the various commands for working with preprocessor macros. */
add_prefix_cmd ("macro", class_info, macro_command,
_("Show the definition of MACRO, and its source location."),
&infolist);
+ add_cmd ("macros", no_class, info_macros_command,
+ _("Show the definitions of all macros at LINESPEC, or the current \
+source location.\n\
+Usage: info macros [LINESPEC]"),
+ &infolist);
+
+ add_cmd ("definitions", no_class, info_definitions_command,
+ _("Show all definitions of MACRO in the current compilation unit.\n\
+Usage: info definitions MACRO"),
+ &infolist);
+
add_cmd ("define", no_class, macro_define_command, _("\
Define a new C/C++ preprocessor macro.\n\
The GDB command `macro define DEFINITION' is equivalent to placing a\n\
add_cmd ("list", no_class, macro_list_command,
_("List all the macros defined using the `macro define' command."),
¯olist);
-
- user_macros = new_macro_table (0, 0);
}
projects / deliverable / binutils-gdb.git / blobdiff