/* C preprocessor macro expansion commands for GDB.
- Copyright (C) 2002, 2007 Free Software Foundation, Inc.
+ Copyright (C) 2002-2019 Free Software Foundation, Inc.
Contributed by Red Hat, Inc.
This file is part of GDB.
#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)
+macro_command (const 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);
+ help_list (macrolist, "macro ", all_commands, gdb_stdout);
}
/* Macro expansion commands. */
+/* Prints an informational message regarding the lack of macro information. */
static void
-macro_expand_command (char *exp, int from_tty)
+macro_inform_no_debuginfo (void)
{
- struct macro_scope *ms = NULL;
- char *expanded = NULL;
- struct cleanup *cleanup_chain = make_cleanup (free_current_contents, &ms);
- make_cleanup (free_current_contents, &expanded);
+ puts_filtered ("GDB has no preprocessor macro information for that code.\n");
+}
+
+static void
+macro_expand_command (const char *exp, int from_tty)
+{
+ 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.
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.
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."));
+ " 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; /* -Wmissing-prototypes */
+/* 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,
¯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_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\
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