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|
/* Scheme interface to symbols.
Copyright (C) 2008-2022 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 "block.h"
#include "frame.h"
#include "symtab.h"
#include "objfiles.h"
#include "value.h"
#include "guile-internal.h"
/* The <gdb:symbol> smob. */
struct symbol_smob
{
/* This always appears first. */
eqable_gdb_smob base;
/* The GDB symbol structure this smob is wrapping. */
struct symbol *symbol;
};
static const char symbol_smob_name[] = "gdb:symbol";
/* The tag Guile knows the symbol smob by. */
static scm_t_bits symbol_smob_tag;
/* Keywords used in argument passing. */
static SCM block_keyword;
static SCM domain_keyword;
static SCM frame_keyword;
static const struct objfile_data *syscm_objfile_data_key;
static struct gdbarch_data *syscm_gdbarch_data_key;
struct syscm_gdbarch_data
{
/* Hash table to implement eqable gdbarch symbols. */
htab_t htab;
};
/* Administrivia for symbol smobs. */
/* Helper function to hash a symbol_smob. */
static hashval_t
syscm_hash_symbol_smob (const void *p)
{
const symbol_smob *s_smob = (const symbol_smob *) p;
return htab_hash_pointer (s_smob->symbol);
}
/* Helper function to compute equality of symbol_smobs. */
static int
syscm_eq_symbol_smob (const void *ap, const void *bp)
{
const symbol_smob *a = (const symbol_smob *) ap;
const symbol_smob *b = (const symbol_smob *) bp;
return (a->symbol == b->symbol
&& a->symbol != NULL);
}
static void *
syscm_init_arch_symbols (struct gdbarch *gdbarch)
{
struct syscm_gdbarch_data *data
= GDBARCH_OBSTACK_ZALLOC (gdbarch, struct syscm_gdbarch_data);
data->htab = gdbscm_create_eqable_gsmob_ptr_map (syscm_hash_symbol_smob,
syscm_eq_symbol_smob);
return data;
}
/* Return the struct symbol pointer -> SCM mapping table.
It is created if necessary. */
static htab_t
syscm_get_symbol_map (struct symbol *symbol)
{
htab_t htab;
if (SYMBOL_OBJFILE_OWNED (symbol))
{
struct objfile *objfile = symbol_objfile (symbol);
htab = (htab_t) objfile_data (objfile, syscm_objfile_data_key);
if (htab == NULL)
{
htab = gdbscm_create_eqable_gsmob_ptr_map (syscm_hash_symbol_smob,
syscm_eq_symbol_smob);
set_objfile_data (objfile, syscm_objfile_data_key, htab);
}
}
else
{
struct gdbarch *gdbarch = symbol_arch (symbol);
struct syscm_gdbarch_data *data
= (struct syscm_gdbarch_data *) gdbarch_data (gdbarch,
syscm_gdbarch_data_key);
htab = data->htab;
}
return htab;
}
/* The smob "free" function for <gdb:symbol>. */
static size_t
syscm_free_symbol_smob (SCM self)
{
symbol_smob *s_smob = (symbol_smob *) SCM_SMOB_DATA (self);
if (s_smob->symbol != NULL)
{
htab_t htab = syscm_get_symbol_map (s_smob->symbol);
gdbscm_clear_eqable_gsmob_ptr_slot (htab, &s_smob->base);
}
/* Not necessary, done to catch bugs. */
s_smob->symbol = NULL;
return 0;
}
/* The smob "print" function for <gdb:symbol>. */
static int
syscm_print_symbol_smob (SCM self, SCM port, scm_print_state *pstate)
{
symbol_smob *s_smob = (symbol_smob *) SCM_SMOB_DATA (self);
if (pstate->writingp)
gdbscm_printf (port, "#<%s ", symbol_smob_name);
gdbscm_printf (port, "%s",
s_smob->symbol != NULL
? s_smob->symbol->print_name ()
: "<invalid>");
if (pstate->writingp)
scm_puts (">", port);
scm_remember_upto_here_1 (self);
/* Non-zero means success. */
return 1;
}
/* Low level routine to create a <gdb:symbol> object. */
static SCM
syscm_make_symbol_smob (void)
{
symbol_smob *s_smob = (symbol_smob *)
scm_gc_malloc (sizeof (symbol_smob), symbol_smob_name);
SCM s_scm;
s_smob->symbol = NULL;
s_scm = scm_new_smob (symbol_smob_tag, (scm_t_bits) s_smob);
gdbscm_init_eqable_gsmob (&s_smob->base, s_scm);
return s_scm;
}
/* Return non-zero if SCM is a symbol smob. */
int
syscm_is_symbol (SCM scm)
{
return SCM_SMOB_PREDICATE (symbol_smob_tag, scm);
}
/* (symbol? object) -> boolean */
static SCM
gdbscm_symbol_p (SCM scm)
{
return scm_from_bool (syscm_is_symbol (scm));
}
/* Return the existing object that encapsulates SYMBOL, or create a new
<gdb:symbol> object. */
SCM
syscm_scm_from_symbol (struct symbol *symbol)
{
htab_t htab;
eqable_gdb_smob **slot;
symbol_smob *s_smob, s_smob_for_lookup;
SCM s_scm;
/* If we've already created a gsmob for this symbol, return it.
This makes symbols eq?-able. */
htab = syscm_get_symbol_map (symbol);
s_smob_for_lookup.symbol = symbol;
slot = gdbscm_find_eqable_gsmob_ptr_slot (htab, &s_smob_for_lookup.base);
if (*slot != NULL)
return (*slot)->containing_scm;
s_scm = syscm_make_symbol_smob ();
s_smob = (symbol_smob *) SCM_SMOB_DATA (s_scm);
s_smob->symbol = symbol;
gdbscm_fill_eqable_gsmob_ptr_slot (slot, &s_smob->base);
return s_scm;
}
/* Returns the <gdb:symbol> object in SELF.
Throws an exception if SELF is not a <gdb:symbol> object. */
static SCM
syscm_get_symbol_arg_unsafe (SCM self, int arg_pos, const char *func_name)
{
SCM_ASSERT_TYPE (syscm_is_symbol (self), self, arg_pos, func_name,
symbol_smob_name);
return self;
}
/* Returns a pointer to the symbol smob of SELF.
Throws an exception if SELF is not a <gdb:symbol> object. */
static symbol_smob *
syscm_get_symbol_smob_arg_unsafe (SCM self, int arg_pos, const char *func_name)
{
SCM s_scm = syscm_get_symbol_arg_unsafe (self, arg_pos, func_name);
symbol_smob *s_smob = (symbol_smob *) SCM_SMOB_DATA (s_scm);
return s_smob;
}
/* Return non-zero if symbol S_SMOB is valid. */
static int
syscm_is_valid (symbol_smob *s_smob)
{
return s_smob->symbol != NULL;
}
/* Throw a Scheme error if SELF is not a valid symbol smob.
Otherwise return a pointer to the symbol smob. */
static symbol_smob *
syscm_get_valid_symbol_smob_arg_unsafe (SCM self, int arg_pos,
const char *func_name)
{
symbol_smob *s_smob
= syscm_get_symbol_smob_arg_unsafe (self, arg_pos, func_name);
if (!syscm_is_valid (s_smob))
{
gdbscm_invalid_object_error (func_name, arg_pos, self,
_("<gdb:symbol>"));
}
return s_smob;
}
/* Throw a Scheme error if SELF is not a valid symbol smob.
Otherwise return a pointer to the symbol struct. */
struct symbol *
syscm_get_valid_symbol_arg_unsafe (SCM self, int arg_pos,
const char *func_name)
{
symbol_smob *s_smob = syscm_get_valid_symbol_smob_arg_unsafe (self, arg_pos,
func_name);
return s_smob->symbol;
}
/* Helper function for syscm_del_objfile_symbols to mark the symbol
as invalid. */
static int
syscm_mark_symbol_invalid (void **slot, void *info)
{
symbol_smob *s_smob = (symbol_smob *) *slot;
s_smob->symbol = NULL;
return 1;
}
/* This function is called when an objfile is about to be freed.
Invalidate the symbol as further actions on the symbol would result
in bad data. All access to s_smob->symbol should be gated by
syscm_get_valid_symbol_smob_arg_unsafe which will raise an exception on
invalid symbols. */
static void
syscm_del_objfile_symbols (struct objfile *objfile, void *datum)
{
htab_t htab = (htab_t) datum;
if (htab != NULL)
{
htab_traverse_noresize (htab, syscm_mark_symbol_invalid, NULL);
htab_delete (htab);
}
}
/* Symbol methods. */
/* (symbol-valid? <gdb:symbol>) -> boolean
Returns #t if SELF still exists in GDB. */
static SCM
gdbscm_symbol_valid_p (SCM self)
{
symbol_smob *s_smob
= syscm_get_symbol_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
return scm_from_bool (syscm_is_valid (s_smob));
}
/* (symbol-type <gdb:symbol>) -> <gdb:type>
Return the type of SELF, or #f if SELF has no type. */
static SCM
gdbscm_symbol_type (SCM self)
{
symbol_smob *s_smob
= syscm_get_valid_symbol_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
const struct symbol *symbol = s_smob->symbol;
if (SYMBOL_TYPE (symbol) == NULL)
return SCM_BOOL_F;
return tyscm_scm_from_type (SYMBOL_TYPE (symbol));
}
/* (symbol-symtab <gdb:symbol>) -> <gdb:symtab> | #f
Return the symbol table of SELF.
If SELF does not have a symtab (it is arch-owned) return #f. */
static SCM
gdbscm_symbol_symtab (SCM self)
{
symbol_smob *s_smob
= syscm_get_valid_symbol_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
const struct symbol *symbol = s_smob->symbol;
if (!SYMBOL_OBJFILE_OWNED (symbol))
return SCM_BOOL_F;
return stscm_scm_from_symtab (symbol_symtab (symbol));
}
/* (symbol-name <gdb:symbol>) -> string */
static SCM
gdbscm_symbol_name (SCM self)
{
symbol_smob *s_smob
= syscm_get_valid_symbol_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
const struct symbol *symbol = s_smob->symbol;
return gdbscm_scm_from_c_string (symbol->natural_name ());
}
/* (symbol-linkage-name <gdb:symbol>) -> string */
static SCM
gdbscm_symbol_linkage_name (SCM self)
{
symbol_smob *s_smob
= syscm_get_valid_symbol_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
const struct symbol *symbol = s_smob->symbol;
return gdbscm_scm_from_c_string (symbol->linkage_name ());
}
/* (symbol-print-name <gdb:symbol>) -> string */
static SCM
gdbscm_symbol_print_name (SCM self)
{
symbol_smob *s_smob
= syscm_get_valid_symbol_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
const struct symbol *symbol = s_smob->symbol;
return gdbscm_scm_from_c_string (symbol->print_name ());
}
/* (symbol-addr-class <gdb:symbol>) -> integer */
static SCM
gdbscm_symbol_addr_class (SCM self)
{
symbol_smob *s_smob
= syscm_get_valid_symbol_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
const struct symbol *symbol = s_smob->symbol;
return scm_from_int (symbol->aclass ());
}
/* (symbol-argument? <gdb:symbol>) -> boolean */
static SCM
gdbscm_symbol_argument_p (SCM self)
{
symbol_smob *s_smob
= syscm_get_valid_symbol_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
const struct symbol *symbol = s_smob->symbol;
return scm_from_bool (SYMBOL_IS_ARGUMENT (symbol));
}
/* (symbol-constant? <gdb:symbol>) -> boolean */
static SCM
gdbscm_symbol_constant_p (SCM self)
{
symbol_smob *s_smob
= syscm_get_valid_symbol_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
const struct symbol *symbol = s_smob->symbol;
enum address_class theclass;
theclass = symbol->aclass ();
return scm_from_bool (theclass == LOC_CONST || theclass == LOC_CONST_BYTES);
}
/* (symbol-function? <gdb:symbol>) -> boolean */
static SCM
gdbscm_symbol_function_p (SCM self)
{
symbol_smob *s_smob
= syscm_get_valid_symbol_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
const struct symbol *symbol = s_smob->symbol;
enum address_class theclass;
theclass = symbol->aclass ();
return scm_from_bool (theclass == LOC_BLOCK);
}
/* (symbol-variable? <gdb:symbol>) -> boolean */
static SCM
gdbscm_symbol_variable_p (SCM self)
{
symbol_smob *s_smob
= syscm_get_valid_symbol_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
const struct symbol *symbol = s_smob->symbol;
enum address_class theclass;
theclass = symbol->aclass ();
return scm_from_bool (!SYMBOL_IS_ARGUMENT (symbol)
&& (theclass == LOC_LOCAL || theclass == LOC_REGISTER
|| theclass == LOC_STATIC || theclass == LOC_COMPUTED
|| theclass == LOC_OPTIMIZED_OUT));
}
/* (symbol-needs-frame? <gdb:symbol>) -> boolean
Return #t if the symbol needs a frame for evaluation. */
static SCM
gdbscm_symbol_needs_frame_p (SCM self)
{
symbol_smob *s_smob
= syscm_get_valid_symbol_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
struct symbol *symbol = s_smob->symbol;
int result = 0;
gdbscm_gdb_exception exc {};
try
{
result = symbol_read_needs_frame (symbol);
}
catch (const gdb_exception &except)
{
exc = unpack (except);
}
GDBSCM_HANDLE_GDB_EXCEPTION (exc);
return scm_from_bool (result);
}
/* (symbol-line <gdb:symbol>) -> integer
Return the line number at which the symbol was defined. */
static SCM
gdbscm_symbol_line (SCM self)
{
symbol_smob *s_smob
= syscm_get_valid_symbol_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
const struct symbol *symbol = s_smob->symbol;
return scm_from_int (SYMBOL_LINE (symbol));
}
/* (symbol-value <gdb:symbol> [#:frame <gdb:frame>]) -> <gdb:value>
Return the value of the symbol, or an error in various circumstances. */
static SCM
gdbscm_symbol_value (SCM self, SCM rest)
{
symbol_smob *s_smob
= syscm_get_valid_symbol_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
struct symbol *symbol = s_smob->symbol;
SCM keywords[] = { frame_keyword, SCM_BOOL_F };
int frame_pos = -1;
SCM frame_scm = SCM_BOOL_F;
frame_smob *f_smob = NULL;
struct frame_info *frame_info = NULL;
struct value *value = NULL;
gdbscm_parse_function_args (FUNC_NAME, SCM_ARG2, keywords, "#O",
rest, &frame_pos, &frame_scm);
if (!gdbscm_is_false (frame_scm))
f_smob = frscm_get_frame_smob_arg_unsafe (frame_scm, frame_pos, FUNC_NAME);
if (symbol->aclass () == LOC_TYPEDEF)
{
gdbscm_out_of_range_error (FUNC_NAME, SCM_ARG1, self,
_("cannot get the value of a typedef"));
}
gdbscm_gdb_exception exc {};
try
{
if (f_smob != NULL)
{
frame_info = frscm_frame_smob_to_frame (f_smob);
if (frame_info == NULL)
error (_("Invalid frame"));
}
if (symbol_read_needs_frame (symbol) && frame_info == NULL)
error (_("Symbol requires a frame to compute its value"));
/* TODO: currently, we have no way to recover the block in which SYMBOL
was found, so we have no block to pass to read_var_value. This will
yield an incorrect value when symbol is not local to FRAME_INFO (this
can happen with nested functions). */
value = read_var_value (symbol, NULL, frame_info);
}
catch (const gdb_exception &except)
{
exc = unpack (except);
}
GDBSCM_HANDLE_GDB_EXCEPTION (exc);
return vlscm_scm_from_value (value);
}
/* (lookup-symbol name [#:block <gdb:block>] [#:domain domain])
-> (<gdb:symbol> field-of-this?)
The result is #f if the symbol is not found.
See comment in lookup_symbol_in_language for field-of-this?. */
static SCM
gdbscm_lookup_symbol (SCM name_scm, SCM rest)
{
char *name;
SCM keywords[] = { block_keyword, domain_keyword, SCM_BOOL_F };
const struct block *block = NULL;
SCM block_scm = SCM_BOOL_F;
int domain = VAR_DOMAIN;
int block_arg_pos = -1, domain_arg_pos = -1;
struct field_of_this_result is_a_field_of_this;
struct symbol *symbol = NULL;
gdbscm_parse_function_args (FUNC_NAME, SCM_ARG1, keywords, "s#Oi",
name_scm, &name, rest,
&block_arg_pos, &block_scm,
&domain_arg_pos, &domain);
if (block_arg_pos >= 0)
{
SCM except_scm;
block = bkscm_scm_to_block (block_scm, block_arg_pos, FUNC_NAME,
&except_scm);
if (block == NULL)
{
xfree (name);
gdbscm_throw (except_scm);
}
}
else
{
struct frame_info *selected_frame;
gdbscm_gdb_exception exc {};
try
{
selected_frame = get_selected_frame (_("no frame selected"));
block = get_frame_block (selected_frame, NULL);
}
catch (const gdb_exception &ex)
{
xfree (name);
exc = unpack (ex);
}
GDBSCM_HANDLE_GDB_EXCEPTION (exc);
}
gdbscm_gdb_exception except {};
try
{
symbol = lookup_symbol (name, block, (domain_enum) domain,
&is_a_field_of_this).symbol;
}
catch (const gdb_exception &ex)
{
except = unpack (ex);
}
xfree (name);
GDBSCM_HANDLE_GDB_EXCEPTION (except);
if (symbol == NULL)
return SCM_BOOL_F;
return scm_list_2 (syscm_scm_from_symbol (symbol),
scm_from_bool (is_a_field_of_this.type != NULL));
}
/* (lookup-global-symbol name [#:domain domain]) -> <gdb:symbol>
The result is #f if the symbol is not found. */
static SCM
gdbscm_lookup_global_symbol (SCM name_scm, SCM rest)
{
char *name;
SCM keywords[] = { domain_keyword, SCM_BOOL_F };
int domain_arg_pos = -1;
int domain = VAR_DOMAIN;
struct symbol *symbol = NULL;
gdbscm_gdb_exception except {};
gdbscm_parse_function_args (FUNC_NAME, SCM_ARG1, keywords, "s#i",
name_scm, &name, rest,
&domain_arg_pos, &domain);
try
{
symbol = lookup_global_symbol (name, NULL, (domain_enum) domain).symbol;
}
catch (const gdb_exception &ex)
{
except = unpack (ex);
}
xfree (name);
GDBSCM_HANDLE_GDB_EXCEPTION (except);
if (symbol == NULL)
return SCM_BOOL_F;
return syscm_scm_from_symbol (symbol);
}
/* Initialize the Scheme symbol support. */
/* Note: The SYMBOL_ prefix on the integer constants here is present for
compatibility with the Python support. */
static const scheme_integer_constant symbol_integer_constants[] =
{
#define X(SYM) { "SYMBOL_" #SYM, SYM }
X (LOC_UNDEF),
X (LOC_CONST),
X (LOC_STATIC),
X (LOC_REGISTER),
X (LOC_ARG),
X (LOC_REF_ARG),
X (LOC_LOCAL),
X (LOC_TYPEDEF),
X (LOC_LABEL),
X (LOC_BLOCK),
X (LOC_CONST_BYTES),
X (LOC_UNRESOLVED),
X (LOC_OPTIMIZED_OUT),
X (LOC_COMPUTED),
X (LOC_REGPARM_ADDR),
X (UNDEF_DOMAIN),
X (VAR_DOMAIN),
X (STRUCT_DOMAIN),
X (LABEL_DOMAIN),
X (VARIABLES_DOMAIN),
X (FUNCTIONS_DOMAIN),
X (TYPES_DOMAIN),
#undef X
END_INTEGER_CONSTANTS
};
static const scheme_function symbol_functions[] =
{
{ "symbol?", 1, 0, 0, as_a_scm_t_subr (gdbscm_symbol_p),
"\
Return #t if the object is a <gdb:symbol> object." },
{ "symbol-valid?", 1, 0, 0, as_a_scm_t_subr (gdbscm_symbol_valid_p),
"\
Return #t if object is a valid <gdb:symbol> object.\n\
A valid symbol is a symbol that has not been freed.\n\
Symbols are freed when the objfile they come from is freed." },
{ "symbol-type", 1, 0, 0, as_a_scm_t_subr (gdbscm_symbol_type),
"\
Return the type of symbol." },
{ "symbol-symtab", 1, 0, 0, as_a_scm_t_subr (gdbscm_symbol_symtab),
"\
Return the symbol table (<gdb:symtab>) containing symbol." },
{ "symbol-line", 1, 0, 0, as_a_scm_t_subr (gdbscm_symbol_line),
"\
Return the line number at which the symbol was defined." },
{ "symbol-name", 1, 0, 0, as_a_scm_t_subr (gdbscm_symbol_name),
"\
Return the name of the symbol as a string." },
{ "symbol-linkage-name", 1, 0, 0,
as_a_scm_t_subr (gdbscm_symbol_linkage_name),
"\
Return the linkage name of the symbol as a string." },
{ "symbol-print-name", 1, 0, 0, as_a_scm_t_subr (gdbscm_symbol_print_name),
"\
Return the print name of the symbol as a string.\n\
This is either name or linkage-name, depending on whether the user\n\
asked GDB to display demangled or mangled names." },
{ "symbol-addr-class", 1, 0, 0, as_a_scm_t_subr (gdbscm_symbol_addr_class),
"\
Return the address class of the symbol." },
{ "symbol-needs-frame?", 1, 0, 0,
as_a_scm_t_subr (gdbscm_symbol_needs_frame_p),
"\
Return #t if the symbol needs a frame to compute its value." },
{ "symbol-argument?", 1, 0, 0, as_a_scm_t_subr (gdbscm_symbol_argument_p),
"\
Return #t if the symbol is a function argument." },
{ "symbol-constant?", 1, 0, 0, as_a_scm_t_subr (gdbscm_symbol_constant_p),
"\
Return #t if the symbol is a constant." },
{ "symbol-function?", 1, 0, 0, as_a_scm_t_subr (gdbscm_symbol_function_p),
"\
Return #t if the symbol is a function." },
{ "symbol-variable?", 1, 0, 0, as_a_scm_t_subr (gdbscm_symbol_variable_p),
"\
Return #t if the symbol is a variable." },
{ "symbol-value", 1, 0, 1, as_a_scm_t_subr (gdbscm_symbol_value),
"\
Return the value of the symbol.\n\
\n\
Arguments: <gdb:symbol> [#:frame frame]" },
{ "lookup-symbol", 1, 0, 1, as_a_scm_t_subr (gdbscm_lookup_symbol),
"\
Return (<gdb:symbol> field-of-this?) if found, otherwise #f.\n\
\n\
Arguments: name [#:block block] [#:domain domain]\n\
name: a string containing the name of the symbol to lookup\n\
block: a <gdb:block> object\n\
domain: a SYMBOL_*_DOMAIN value" },
{ "lookup-global-symbol", 1, 0, 1,
as_a_scm_t_subr (gdbscm_lookup_global_symbol),
"\
Return <gdb:symbol> if found, otherwise #f.\n\
\n\
Arguments: name [#:domain domain]\n\
name: a string containing the name of the symbol to lookup\n\
domain: a SYMBOL_*_DOMAIN value" },
END_FUNCTIONS
};
void
gdbscm_initialize_symbols (void)
{
symbol_smob_tag
= gdbscm_make_smob_type (symbol_smob_name, sizeof (symbol_smob));
scm_set_smob_free (symbol_smob_tag, syscm_free_symbol_smob);
scm_set_smob_print (symbol_smob_tag, syscm_print_symbol_smob);
gdbscm_define_integer_constants (symbol_integer_constants, 1);
gdbscm_define_functions (symbol_functions, 1);
block_keyword = scm_from_latin1_keyword ("block");
domain_keyword = scm_from_latin1_keyword ("domain");
frame_keyword = scm_from_latin1_keyword ("frame");
}
void _initialize_scm_symbol ();
void
_initialize_scm_symbol ()
{
/* Register an objfile "free" callback so we can properly
invalidate symbols when an object file is about to be deleted. */
syscm_objfile_data_key
= register_objfile_data_with_cleanup (NULL, syscm_del_objfile_symbols);
/* Arch-specific symbol data. */
syscm_gdbarch_data_key
= gdbarch_data_register_post_init (syscm_init_arch_symbols);
}
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