/* C preprocessor macro expansion commands for GDB.
- Copyright 2002 Free Software Foundation, Inc.
+ Copyright (C) 2002-2020 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 "macrotab.h"
#include "macroexp.h"
#include "macroscope.h"
+#include "cli/cli-style.h"
+#include "cli/cli-utils.h"
#include "command.h"
#include "gdbcmd.h"
+#include "linespec.h"
\f
/* The `macro' prefix command. */
static struct cmd_list_element *macrolist;
-static void
-macro_command (char *arg, int from_tty)
-{
- printf_unfiltered
- ("\"macro\" must be followed by the name of a macro command.\n");
- help_list (macrolist, "macro ", -1, gdb_stdout);
-}
-
-
\f
/* Macro expansion commands. */
+/* Prints an informational message regarding the lack of macro information. */
+static void
+macro_inform_no_debuginfo (void)
+{
+ puts_filtered ("GDB has no preprocessor macro information for that code.\n");
+}
+
static void
-macro_expand_command (char *exp, int from_tty)
+macro_expand_command (const char *exp, int from_tty)
{
- struct macro_scope *ms = NULL;
- char *expanded = NULL;
- struct cleanup *cleanup_chain = make_cleanup (free_current_contents, &ms);
- make_cleanup (free_current_contents, &expanded);
+ gdb::unique_xmalloc_ptr<struct macro_scope> ms;
+ gdb::unique_xmalloc_ptr<char> expanded;
/* You know, when the user doesn't specify any expression, it would be
really cool if this defaulted to the last expression evaluated.
at the moment, the `print' commands don't save the last expression
evaluated, just its value. */
if (! exp || ! *exp)
- error ("You must follow the `macro expand' command with the"
+ error (_("You must follow the `macro expand' command with the"
" expression you\n"
- "want to expand.");
+ "want to expand."));
ms = default_macro_scope ();
if (ms)
{
- expanded = macro_expand (exp, standard_macro_lookup, ms);
+ expanded = macro_expand (exp, standard_macro_lookup, ms.get ());
fputs_filtered ("expands to: ", gdb_stdout);
- fputs_filtered (expanded, gdb_stdout);
+ fputs_filtered (expanded.get (), gdb_stdout);
fputs_filtered ("\n", gdb_stdout);
}
else
- fputs_filtered ("GDB has no preprocessor macro information for "
- "that code.\n",
- gdb_stdout);
-
- do_cleanups (cleanup_chain);
- return;
+ macro_inform_no_debuginfo ();
}
static void
-macro_expand_once_command (char *exp, int from_tty)
+macro_expand_once_command (const char *exp, int from_tty)
{
- struct macro_scope *ms = NULL;
- char *expanded = NULL;
- struct cleanup *cleanup_chain = make_cleanup (free_current_contents, &ms);
- make_cleanup (free_current_contents, &expanded);
+ gdb::unique_xmalloc_ptr<struct macro_scope> ms;
+ gdb::unique_xmalloc_ptr<char> expanded;
/* You know, when the user doesn't specify any expression, it would be
really cool if this defaulted to the last expression evaluated.
expression'. That way, you could just hit return over and over and
see the expression expanded one level at a time. */
if (! exp || ! *exp)
- error ("You must follow the `macro expand-once' command with"
+ error (_("You must follow the `macro expand-once' command with"
" the expression\n"
- "you want to expand.");
+ "you want to expand."));
ms = default_macro_scope ();
if (ms)
{
- expanded = macro_expand_once (exp, standard_macro_lookup, ms);
+ expanded = macro_expand_once (exp, standard_macro_lookup, ms.get ());
fputs_filtered ("expands to: ", gdb_stdout);
- fputs_filtered (expanded, gdb_stdout);
+ fputs_filtered (expanded.get (), gdb_stdout);
fputs_filtered ("\n", gdb_stdout);
}
else
- fputs_filtered ("GDB has no preprocessor macro information for "
- "that code.\n",
- gdb_stdout);
-
- do_cleanups (cleanup_chain);
- return;
+ macro_inform_no_debuginfo ();
}
+/* 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,
int line)
{
- fprintf_filtered (stream, "%s:%d\n", file->filename, line);
+ std::string fullname = macro_source_fullname (file);
+ fprintf_filtered (stream, "%ps:%d\n",
+ styled_string (file_name_style.style (),
+ fullname.c_str ()),
+ line);
while (file->included_by)
{
- fprintf_filtered (gdb_stdout, " included at %s:%d\n",
- file->included_by->filename,
- file->included_at_line);
+ fullname = macro_source_fullname (file->included_by);
+ fputs_filtered (_(" included at "), stream);
+ fputs_styled (fullname.c_str (), file_name_style.style (), stream);
+ fprintf_filtered (stream, ":%d\n", file->included_at_line);
file = file->included_by;
}
}
+/* 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);
+}
+/* The implementation of the `info macro' command. */
static void
-info_macro_command (char *name, int from_tty)
+info_macro_command (const char *args, int from_tty)
{
- struct macro_scope *ms = NULL;
- struct cleanup *cleanup_chain = make_cleanup (free_current_contents, &ms);
- struct macro_definition *d;
-
+ gdb::unique_xmalloc_ptr<struct macro_scope> ms;
+ const char *name;
+ int show_all_macros_named = 0;
+ const char *arg_start = args;
+ int processing_args = 1;
+
+ while (processing_args
+ && arg_start && *arg_start == '-' && *arg_start != '\0')
+ {
+ const char *p = skip_to_space (arg_start);
+
+ if (strncmp (arg_start, "-a", p - arg_start) == 0
+ || strncmp (arg_start, "-all", p - arg_start) == 0)
+ show_all_macros_named = 1;
+ else if (strncmp (arg_start, "--", p - arg_start) == 0)
+ /* Our macro support seems rather C specific but this would
+ seem necessary for languages allowing - in macro names.
+ e.g. Scheme's (defmacro ->foo () "bar\n") */
+ processing_args = 0;
+ else
+ report_unrecognized_option_error ("info macro", arg_start);
+
+ arg_start = skip_spaces (p);
+ }
+
+ name = arg_start;
+
if (! name || ! *name)
- error ("You must follow the `info macro' command with the name"
- " of the macro\n"
- "whose definition you want to see.");
+ error (_("You must follow the `info macro' command with the name"
+ " of the macro\n"
+ "whose definition you want to see."));
ms = default_macro_scope ();
- if (! ms)
- error ("GDB has no preprocessor macro information for that code.");
- d = macro_lookup_definition (ms->file, ms->line, name);
- if (d)
+ if (! ms)
+ macro_inform_no_debuginfo ();
+ else if (show_all_macros_named)
+ macro_for_each (ms->file->table, [&] (const char *macro_name,
+ const macro_definition *macro,
+ macro_source_file *source,
+ int line)
+ {
+ if (strcmp (name, macro_name) == 0)
+ print_macro_definition (name, macro, source, line);
+ });
+ else
{
- int line;
- 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)
+ struct macro_definition *d;
+
+ d = macro_lookup_definition (ms->file, ms->line, name);
+ if (d)
+ {
+ int line;
+ struct macro_source_file *file
+ = macro_definition_location (ms->file, ms->line, name, &line);
+
+ print_macro_definition (name, d, file, line);
+ }
+ else
{
- 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);
+ fprintf_filtered (gdb_stdout,
+ "The symbol `%s' has no definition as a C/C++"
+ " preprocessor macro\n"
+ "at ", name);
+ show_pp_source_pos (gdb_stdout, ms->file, ms->line);
+ }
}
+}
+
+/* Implementation of the "info macros" command. */
+static void
+info_macros_command (const char *args, int from_tty)
+{
+ gdb::unique_xmalloc_ptr<struct macro_scope> ms;
+
+ if (args == NULL)
+ ms = default_macro_scope ();
else
{
- fprintf_filtered (gdb_stdout,
- "The symbol `%s' has no definition as a C/C++"
- " preprocessor macro\n"
- "at ", name);
- show_pp_source_pos (gdb_stdout, ms->file, ms->line);
+ std::vector<symtab_and_line> sals
+ = decode_line_with_current_source (args, 0);
+
+ if (!sals.empty ())
+ ms = sal_macro_scope (sals[0]);
}
- do_cleanups (cleanup_chain);
+ if (! ms || ! ms->file || ! ms->file->table)
+ macro_inform_no_debuginfo ();
+ else
+ macro_for_each_in_scope (ms->file, ms->line, print_macro_definition);
}
-
\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 (const 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 gdb::unique_xmalloc_ptr<char>
+extract_identifier (const char **expp, int is_parameter)
+{
+ char *result;
+ const char *p = *expp;
+ unsigned int len;
+
+ if (is_parameter && startswith (p, "..."))
+ {
+ /* 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 && startswith (p, "..."))
+ p += 3;
+
+ len = p - *expp;
+ result = (char *) xmalloc (len + 1);
+ memcpy (result, *expp, len);
+ result[len] = '\0';
+ *expp += len;
+ return gdb::unique_xmalloc_ptr<char> (result);
+}
+
+struct temporary_macro_definition : public macro_definition
+{
+ temporary_macro_definition ()
+ {
+ table = nullptr;
+ kind = macro_object_like;
+ argc = 0;
+ argv = nullptr;
+ replacement = nullptr;
+ }
+
+ ~temporary_macro_definition ()
+ {
+ int i;
+
+ for (i = 0; i < argc; ++i)
+ xfree ((char *) argv[i]);
+ xfree ((char *) argv);
+ /* Note that the 'replacement' field is not allocated. */
+ }
+};
static void
-macro_define_command (char *exp, int from_tty)
+macro_define_command (const char *exp, int from_tty)
{
- error ("Command not implemented yet.");
+ temporary_macro_definition new_macro;
+
+ if (!exp)
+ error (_("usage: macro define NAME[(ARGUMENT-LIST)] [REPLACEMENT-LIST]"));
+
+ skip_ws (&exp);
+ gdb::unique_xmalloc_ptr<char> name = extract_identifier (&exp, 0);
+ if (name == NULL)
+ error (_("Invalid macro name."));
+ if (*exp == '(')
+ {
+ /* Function-like macro. */
+ int alloced = 5;
+ char **argv = XNEWVEC (char *, alloced);
+
+ 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).release ();
+ 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.get (),
+ new_macro.argc, (const char **) new_macro.argv,
+ exp);
+ }
+ else
+ {
+ skip_ws (&exp);
+ macro_define_object (macro_main (macro_user_macros), -1, name.get (),
+ exp);
+ }
}
static void
-macro_undef_command (char *exp, int from_tty)
+macro_undef_command (const char *exp, int from_tty)
{
- error ("Command not implemented yet.");
+ if (!exp)
+ error (_("usage: macro undef NAME"));
+
+ skip_ws (&exp);
+ gdb::unique_xmalloc_ptr<char> name = extract_identifier (&exp, 0);
+ if (name == nullptr)
+ error (_("Invalid macro name."));
+ macro_undef (macro_main (macro_user_macros), -1, name.get ());
}
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)
{
- 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);
}
-\f
-/* Initializing the `macrocmd' module. */
+static void
+macro_list_command (const char *exp, int from_tty)
+{
+ macro_for_each (macro_user_macros, print_one_macro);
+}
-extern initialize_file_ftype _initialize_macrocmd;
+/* Initializing the `macrocmd' module. */
+void _initialize_macrocmd ();
void
-_initialize_macrocmd (void)
+_initialize_macrocmd ()
{
- 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,
- "Prefix for commands dealing with C preprocessor macros.",
- ¯olist, "macro ", 0, &cmdlist);
-
- add_cmd
- ("expand", no_class, macro_expand_command,
- "Fully expand any C/C++ preprocessor macro invocations in EXPRESSION.\n"
- "Show the expanded expression.",
- ¯olist);
+ add_basic_prefix_cmd ("macro", class_info,
+ _("Prefix for commands dealing with C preprocessor macros."),
+ ¯olist, "macro ", 0, &cmdlist);
+
+ add_cmd ("expand", no_class, macro_expand_command, _("\
+Fully expand any C/C++ preprocessor macro invocations in EXPRESSION.\n\
+Show the expanded expression."),
+ ¯olist);
add_alias_cmd ("exp", "expand", no_class, 1, ¯olist);
- add_cmd
- ("expand-once", no_class, macro_expand_once_command,
- "Expand C/C++ preprocessor macro invocations appearing directly in"
- " EXPRESSION.\n"
- "Show the expanded expression.\n"
- "\n"
- "This command differs from `macro expand' in that it only expands macro\n"
- "invocations that appear directly in EXPRESSION; if expanding a macro\n"
- "introduces further macro invocations, those are left unexpanded.\n"
- "\n"
- "`macro expand-once' helps you see how a particular macro expands,\n"
- "whereas `macro expand' shows you how all the macros involved in an\n"
- "expression work together to yield a pre-processed expression.",
- ¯olist);
+ add_cmd ("expand-once", no_class, macro_expand_once_command, _("\
+Expand C/C++ preprocessor macro invocations appearing directly in EXPRESSION.\n\
+Show the expanded expression.\n\
+\n\
+This command differs from `macro expand' in that it only expands macro\n\
+invocations that appear directly in EXPRESSION; if expanding a macro\n\
+introduces further macro invocations, those are left unexpanded.\n\
+\n\
+`macro expand-once' helps you see how a particular macro expands,\n\
+whereas `macro expand' shows you how all the macros involved in an\n\
+expression work together to yield a pre-processed expression."),
+ ¯olist);
add_alias_cmd ("exp1", "expand-once", no_class, 1, ¯olist);
- add_cmd
- ("macro", no_class, info_macro_command,
- "Show the definition of MACRO, and its source location.",
- &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"
- "preprocessor directive of the form `#define DEFINITION' such that the\n"
- "definition is visible in all the inferior's source files.\n"
- "For example:\n"
- " (gdb) macro define PI (3.1415926)\n"
- " (gdb) macro define MIN(x,y) ((x) < (y) ? (x) : (y))",
- ¯olist);
-
- add_cmd
- ("undef", no_class, macro_undef_command,
- "Remove the definition of the C/C++ preprocessor macro with the"
- " given name.",
- ¯olist);
-
- 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);
+ add_info ("macro", info_macro_command,
+ _("Show the definition of MACRO, and it's source location.\n\
+Usage: info macro [-a|-all] [--] MACRO\n\
+Options: \n\
+ -a, --all Output all definitions of MACRO in the current compilation\
+ unit.\n\
+ -- Specify the end of arguments and the beginning of the MACRO."));
+
+ add_info ("macros", info_macros_command,
+ _("Show the definitions of all macros at LINESPEC, or the current \
+source location.\n\
+Usage: info macros [LINESPEC]"));
+
+ 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\
+preprocessor directive of the form `#define DEFINITION' such that the\n\
+definition is visible in all the inferior's source files.\n\
+For example:\n\
+ (gdb) macro define PI (3.1415926)\n\
+ (gdb) macro define MIN(x,y) ((x) < (y) ? (x) : (y))"),
+ ¯olist);
+
+ add_cmd ("undef", no_class, macro_undef_command, _("\
+Remove the definition of the C/C++ preprocessor macro with the given name."),
+ ¯olist);
+
+ add_cmd ("list", no_class, macro_list_command,
+ _("List all the macros defined using the `macro define' command."),
+ ¯olist);
}
projects / deliverable / binutils-gdb.git / blobdiff