423 lines
11 KiB
C
423 lines
11 KiB
C
/* Scheme interface to objfiles.
|
||
|
||
Copyright (C) 2008-2015 Free Software Foundation, 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 3 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, see <http://www.gnu.org/licenses/>. */
|
||
|
||
/* See README file in this directory for implementation notes, coding
|
||
conventions, et.al. */
|
||
|
||
#include "defs.h"
|
||
#include "objfiles.h"
|
||
#include "language.h"
|
||
#include "guile-internal.h"
|
||
|
||
/* The <gdb:objfile> smob.
|
||
The typedef for this struct is in guile-internal.h. */
|
||
|
||
struct _objfile_smob
|
||
{
|
||
/* This always appears first. */
|
||
gdb_smob base;
|
||
|
||
/* The corresponding objfile. */
|
||
struct objfile *objfile;
|
||
|
||
/* The pretty-printer list of functions. */
|
||
SCM pretty_printers;
|
||
|
||
/* The <gdb:objfile> object we are contained in, needed to protect/unprotect
|
||
the object since a reference to it comes from non-gc-managed space
|
||
(the objfile). */
|
||
SCM containing_scm;
|
||
};
|
||
|
||
static const char objfile_smob_name[] = "gdb:objfile";
|
||
|
||
/* The tag Guile knows the objfile smob by. */
|
||
static scm_t_bits objfile_smob_tag;
|
||
|
||
static const struct objfile_data *ofscm_objfile_data_key;
|
||
|
||
/* Return the list of pretty-printers registered with O_SMOB. */
|
||
|
||
SCM
|
||
ofscm_objfile_smob_pretty_printers (objfile_smob *o_smob)
|
||
{
|
||
return o_smob->pretty_printers;
|
||
}
|
||
|
||
/* Administrivia for objfile smobs. */
|
||
|
||
/* The smob "print" function for <gdb:objfile>. */
|
||
|
||
static int
|
||
ofscm_print_objfile_smob (SCM self, SCM port, scm_print_state *pstate)
|
||
{
|
||
objfile_smob *o_smob = (objfile_smob *) SCM_SMOB_DATA (self);
|
||
|
||
gdbscm_printf (port, "#<%s ", objfile_smob_name);
|
||
gdbscm_printf (port, "%s",
|
||
o_smob->objfile != NULL
|
||
? objfile_name (o_smob->objfile)
|
||
: "{invalid}");
|
||
scm_puts (">", port);
|
||
|
||
scm_remember_upto_here_1 (self);
|
||
|
||
/* Non-zero means success. */
|
||
return 1;
|
||
}
|
||
|
||
/* Low level routine to create a <gdb:objfile> object.
|
||
It's empty in the sense that an OBJFILE still needs to be associated
|
||
with it. */
|
||
|
||
static SCM
|
||
ofscm_make_objfile_smob (void)
|
||
{
|
||
objfile_smob *o_smob = (objfile_smob *)
|
||
scm_gc_malloc (sizeof (objfile_smob), objfile_smob_name);
|
||
SCM o_scm;
|
||
|
||
o_smob->objfile = NULL;
|
||
o_smob->pretty_printers = SCM_EOL;
|
||
o_scm = scm_new_smob (objfile_smob_tag, (scm_t_bits) o_smob);
|
||
o_smob->containing_scm = o_scm;
|
||
gdbscm_init_gsmob (&o_smob->base);
|
||
|
||
return o_scm;
|
||
}
|
||
|
||
/* Clear the OBJFILE pointer in O_SMOB and unprotect the object from GC. */
|
||
|
||
static void
|
||
ofscm_release_objfile (objfile_smob *o_smob)
|
||
{
|
||
o_smob->objfile = NULL;
|
||
scm_gc_unprotect_object (o_smob->containing_scm);
|
||
}
|
||
|
||
/* Objfile registry cleanup handler for when an objfile is deleted. */
|
||
|
||
static void
|
||
ofscm_handle_objfile_deleted (struct objfile *objfile, void *datum)
|
||
{
|
||
objfile_smob *o_smob = datum;
|
||
|
||
gdb_assert (o_smob->objfile == objfile);
|
||
|
||
ofscm_release_objfile (o_smob);
|
||
}
|
||
|
||
/* Return non-zero if SCM is a <gdb:objfile> object. */
|
||
|
||
static int
|
||
ofscm_is_objfile (SCM scm)
|
||
{
|
||
return SCM_SMOB_PREDICATE (objfile_smob_tag, scm);
|
||
}
|
||
|
||
/* (objfile? object) -> boolean */
|
||
|
||
static SCM
|
||
gdbscm_objfile_p (SCM scm)
|
||
{
|
||
return scm_from_bool (ofscm_is_objfile (scm));
|
||
}
|
||
|
||
/* Return a pointer to the objfile_smob that encapsulates OBJFILE,
|
||
creating one if necessary.
|
||
The result is cached so that we have only one copy per objfile. */
|
||
|
||
objfile_smob *
|
||
ofscm_objfile_smob_from_objfile (struct objfile *objfile)
|
||
{
|
||
objfile_smob *o_smob;
|
||
|
||
o_smob = objfile_data (objfile, ofscm_objfile_data_key);
|
||
if (o_smob == NULL)
|
||
{
|
||
SCM o_scm = ofscm_make_objfile_smob ();
|
||
|
||
o_smob = (objfile_smob *) SCM_SMOB_DATA (o_scm);
|
||
o_smob->objfile = objfile;
|
||
|
||
set_objfile_data (objfile, ofscm_objfile_data_key, o_smob);
|
||
scm_gc_protect_object (o_smob->containing_scm);
|
||
}
|
||
|
||
return o_smob;
|
||
}
|
||
|
||
/* Return the <gdb:objfile> object that encapsulates OBJFILE. */
|
||
|
||
SCM
|
||
ofscm_scm_from_objfile (struct objfile *objfile)
|
||
{
|
||
objfile_smob *o_smob = ofscm_objfile_smob_from_objfile (objfile);
|
||
|
||
return o_smob->containing_scm;
|
||
}
|
||
|
||
/* Returns the <gdb:objfile> object in SELF.
|
||
Throws an exception if SELF is not a <gdb:objfile> object. */
|
||
|
||
static SCM
|
||
ofscm_get_objfile_arg_unsafe (SCM self, int arg_pos, const char *func_name)
|
||
{
|
||
SCM_ASSERT_TYPE (ofscm_is_objfile (self), self, arg_pos, func_name,
|
||
objfile_smob_name);
|
||
|
||
return self;
|
||
}
|
||
|
||
/* Returns a pointer to the objfile smob of SELF.
|
||
Throws an exception if SELF is not a <gdb:objfile> object. */
|
||
|
||
static objfile_smob *
|
||
ofscm_get_objfile_smob_arg_unsafe (SCM self, int arg_pos,
|
||
const char *func_name)
|
||
{
|
||
SCM o_scm = ofscm_get_objfile_arg_unsafe (self, arg_pos, func_name);
|
||
objfile_smob *o_smob = (objfile_smob *) SCM_SMOB_DATA (o_scm);
|
||
|
||
return o_smob;
|
||
}
|
||
|
||
/* Return non-zero if objfile O_SMOB is valid. */
|
||
|
||
static int
|
||
ofscm_is_valid (objfile_smob *o_smob)
|
||
{
|
||
return o_smob->objfile != NULL;
|
||
}
|
||
|
||
/* Return the objfile smob in SELF, verifying it's valid.
|
||
Throws an exception if SELF is not a <gdb:objfile> object or is invalid. */
|
||
|
||
static objfile_smob *
|
||
ofscm_get_valid_objfile_smob_arg_unsafe (SCM self, int arg_pos,
|
||
const char *func_name)
|
||
{
|
||
objfile_smob *o_smob
|
||
= ofscm_get_objfile_smob_arg_unsafe (self, arg_pos, func_name);
|
||
|
||
if (!ofscm_is_valid (o_smob))
|
||
{
|
||
gdbscm_invalid_object_error (func_name, arg_pos, self,
|
||
_("<gdb:objfile>"));
|
||
}
|
||
|
||
return o_smob;
|
||
}
|
||
|
||
/* Objfile methods. */
|
||
|
||
/* (objfile-valid? <gdb:objfile>) -> boolean
|
||
Returns #t if this object file still exists in GDB. */
|
||
|
||
static SCM
|
||
gdbscm_objfile_valid_p (SCM self)
|
||
{
|
||
objfile_smob *o_smob
|
||
= ofscm_get_objfile_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
|
||
|
||
return scm_from_bool (o_smob->objfile != NULL);
|
||
}
|
||
|
||
/* (objfile-filename <gdb:objfile>) -> string
|
||
Returns the objfile's file name.
|
||
Throw's an exception if the underlying objfile is invalid. */
|
||
|
||
static SCM
|
||
gdbscm_objfile_filename (SCM self)
|
||
{
|
||
objfile_smob *o_smob
|
||
= ofscm_get_valid_objfile_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
|
||
|
||
return gdbscm_scm_from_c_string (objfile_name (o_smob->objfile));
|
||
}
|
||
|
||
/* (objfile-pretty-printers <gdb:objfile>) -> list
|
||
Returns the list of pretty-printers for this objfile. */
|
||
|
||
static SCM
|
||
gdbscm_objfile_pretty_printers (SCM self)
|
||
{
|
||
objfile_smob *o_smob
|
||
= ofscm_get_objfile_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
|
||
|
||
return o_smob->pretty_printers;
|
||
}
|
||
|
||
/* (set-objfile-pretty-printers! <gdb:objfile> list) -> unspecified
|
||
Set the pretty-printers for this objfile. */
|
||
|
||
static SCM
|
||
gdbscm_set_objfile_pretty_printers_x (SCM self, SCM printers)
|
||
{
|
||
objfile_smob *o_smob
|
||
= ofscm_get_objfile_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
|
||
|
||
SCM_ASSERT_TYPE (gdbscm_is_true (scm_list_p (printers)), printers,
|
||
SCM_ARG2, FUNC_NAME, _("list"));
|
||
|
||
o_smob->pretty_printers = printers;
|
||
|
||
return SCM_UNSPECIFIED;
|
||
}
|
||
|
||
/* The "current" objfile. This is set when gdb detects that a new
|
||
objfile has been loaded. It is only set for the duration of a call to
|
||
gdbscm_source_objfile_script and gdbscm_execute_objfile_script; it is NULL
|
||
at other times. */
|
||
static struct objfile *ofscm_current_objfile;
|
||
|
||
/* Set the current objfile to OBJFILE and then read FILE named FILENAME
|
||
as Guile code. This does not throw any errors. If an exception
|
||
occurs Guile will print the backtrace.
|
||
This is the extension_language_script_ops.objfile_script_sourcer
|
||
"method". */
|
||
|
||
void
|
||
gdbscm_source_objfile_script (const struct extension_language_defn *extlang,
|
||
struct objfile *objfile, FILE *file,
|
||
const char *filename)
|
||
{
|
||
char *msg;
|
||
|
||
ofscm_current_objfile = objfile;
|
||
|
||
msg = gdbscm_safe_source_script (filename);
|
||
if (msg != NULL)
|
||
{
|
||
fprintf_filtered (gdb_stderr, "%s", msg);
|
||
xfree (msg);
|
||
}
|
||
|
||
ofscm_current_objfile = NULL;
|
||
}
|
||
|
||
/* Set the current objfile to OBJFILE and then read FILE named FILENAME
|
||
as Guile code. This does not throw any errors. If an exception
|
||
occurs Guile will print the backtrace.
|
||
This is the extension_language_script_ops.objfile_script_sourcer
|
||
"method". */
|
||
|
||
void
|
||
gdbscm_execute_objfile_script (const struct extension_language_defn *extlang,
|
||
struct objfile *objfile, const char *name,
|
||
const char *script)
|
||
{
|
||
char *msg;
|
||
|
||
ofscm_current_objfile = objfile;
|
||
|
||
msg = gdbscm_safe_eval_string (script, 0 /* display_result */);
|
||
if (msg != NULL)
|
||
{
|
||
fprintf_filtered (gdb_stderr, "%s", msg);
|
||
xfree (msg);
|
||
}
|
||
|
||
ofscm_current_objfile = NULL;
|
||
}
|
||
|
||
/* (current-objfile) -> <gdb:obfjile>
|
||
Return the current objfile, or #f if there isn't one.
|
||
Ideally this would be named ofscm_current_objfile, but that name is
|
||
taken by the variable recording the current objfile. */
|
||
|
||
static SCM
|
||
gdbscm_get_current_objfile (void)
|
||
{
|
||
if (ofscm_current_objfile == NULL)
|
||
return SCM_BOOL_F;
|
||
|
||
return ofscm_scm_from_objfile (ofscm_current_objfile);
|
||
}
|
||
|
||
/* (objfiles) -> list
|
||
Return a list of all objfiles in the current program space. */
|
||
|
||
static SCM
|
||
gdbscm_objfiles (void)
|
||
{
|
||
struct objfile *objf;
|
||
SCM result;
|
||
|
||
result = SCM_EOL;
|
||
|
||
ALL_OBJFILES (objf)
|
||
{
|
||
SCM item = ofscm_scm_from_objfile (objf);
|
||
|
||
result = scm_cons (item, result);
|
||
}
|
||
|
||
return scm_reverse_x (result, SCM_EOL);
|
||
}
|
||
|
||
/* Initialize the Scheme objfile support. */
|
||
|
||
static const scheme_function objfile_functions[] =
|
||
{
|
||
{ "objfile?", 1, 0, 0, gdbscm_objfile_p,
|
||
"\
|
||
Return #t if the object is a <gdb:objfile> object." },
|
||
|
||
{ "objfile-valid?", 1, 0, 0, gdbscm_objfile_valid_p,
|
||
"\
|
||
Return #t if the objfile is valid (hasn't been deleted from gdb)." },
|
||
|
||
{ "objfile-filename", 1, 0, 0, gdbscm_objfile_filename,
|
||
"\
|
||
Return the file name of the objfile." },
|
||
|
||
{ "objfile-pretty-printers", 1, 0, 0, gdbscm_objfile_pretty_printers,
|
||
"\
|
||
Return a list of pretty-printers of the objfile." },
|
||
|
||
{ "set-objfile-pretty-printers!", 2, 0, 0,
|
||
gdbscm_set_objfile_pretty_printers_x,
|
||
"\
|
||
Set the list of pretty-printers of the objfile." },
|
||
|
||
{ "current-objfile", 0, 0, 0, gdbscm_get_current_objfile,
|
||
"\
|
||
Return the current objfile if there is one or #f if there isn't one." },
|
||
|
||
{ "objfiles", 0, 0, 0, gdbscm_objfiles,
|
||
"\
|
||
Return a list of all objfiles in the current program space." },
|
||
|
||
END_FUNCTIONS
|
||
};
|
||
|
||
void
|
||
gdbscm_initialize_objfiles (void)
|
||
{
|
||
objfile_smob_tag
|
||
= gdbscm_make_smob_type (objfile_smob_name, sizeof (objfile_smob));
|
||
scm_set_smob_print (objfile_smob_tag, ofscm_print_objfile_smob);
|
||
|
||
gdbscm_define_functions (objfile_functions, 1);
|
||
|
||
ofscm_objfile_data_key
|
||
= register_objfile_data_with_cleanup (NULL, ofscm_handle_objfile_deleted);
|
||
}
|