mirror of
https://github.com/darlinghq/darling-gdb.git
synced 2024-12-05 02:47:05 +00:00
233282cd3e
message.
288 lines
8.6 KiB
C
288 lines
8.6 KiB
C
/* C preprocessor macro expansion commands for GDB.
|
||
Copyright 2002 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
|
||
(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, write to the Free Software
|
||
Foundation, Inc., 59 Temple Place - Suite 330,
|
||
Boston, MA 02111-1307, USA. */
|
||
|
||
|
||
#include "defs.h"
|
||
#include "macrotab.h"
|
||
#include "macroexp.h"
|
||
#include "macroscope.h"
|
||
#include "command.h"
|
||
#include "gdbcmd.h"
|
||
|
||
|
||
/* 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);
|
||
}
|
||
|
||
|
||
|
||
/* Macro expansion commands. */
|
||
|
||
|
||
static void
|
||
macro_expand_command (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);
|
||
|
||
/* You know, when the user doesn't specify any expression, it would be
|
||
really cool if this defaulted to the last expression evaluated.
|
||
Then it would be easy to ask, "Hey, what did I just evaluate?" But
|
||
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"
|
||
" expression you\n"
|
||
"want to expand.");
|
||
|
||
ms = default_macro_scope ();
|
||
if (ms)
|
||
{
|
||
expanded = macro_expand (exp, standard_macro_lookup, ms);
|
||
fputs_filtered ("expands to: ", gdb_stdout);
|
||
fputs_filtered (expanded, 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;
|
||
}
|
||
|
||
|
||
static void
|
||
macro_expand_once_command (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);
|
||
|
||
/* You know, when the user doesn't specify any expression, it would be
|
||
really cool if this defaulted to the last expression evaluated.
|
||
And it should set the once-expanded text as the new `last
|
||
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"
|
||
" the expression\n"
|
||
"you want to expand.");
|
||
|
||
ms = default_macro_scope ();
|
||
if (ms)
|
||
{
|
||
expanded = macro_expand_once (exp, standard_macro_lookup, ms);
|
||
fputs_filtered ("expands to: ", gdb_stdout);
|
||
fputs_filtered (expanded, 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;
|
||
}
|
||
|
||
|
||
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);
|
||
|
||
while (file->included_by)
|
||
{
|
||
fprintf_filtered (gdb_stdout, " included at %s:%d\n",
|
||
file->included_by->filename,
|
||
file->included_at_line);
|
||
file = file->included_by;
|
||
}
|
||
}
|
||
|
||
|
||
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"
|
||
"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)
|
||
{
|
||
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)
|
||
{
|
||
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);
|
||
}
|
||
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);
|
||
}
|
||
|
||
do_cleanups (cleanup_chain);
|
||
}
|
||
|
||
|
||
|
||
/* 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
|
||
macro_define_command (char *exp, int from_tty)
|
||
{
|
||
error ("Command not implemented yet.");
|
||
}
|
||
|
||
|
||
static void
|
||
macro_undef_command (char *exp, int from_tty)
|
||
{
|
||
error ("Command not implemented yet.");
|
||
}
|
||
|
||
|
||
static void
|
||
macro_list_command (char *exp, int from_tty)
|
||
{
|
||
error ("Command not implemented yet.");
|
||
}
|
||
|
||
|
||
|
||
/* 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,
|
||
"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_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);
|
||
}
|