old-cross-binutils/gdb/guile/scm-block.c
Tom Tromey 3977b71f1d constify struct block in some places
This makes some spots in gdb, particularly general_symbol_info, use a
"const struct block", then fixes the fallout.

The justification is that, ordinarily, blocks ought to be readonly.
Note though that we can't add "const" in the blockvector due to block
relocation.  This can be done once blocks are made independent of the
program space.

2014-06-18  Tom Tromey  <tromey@redhat.com>

	* varobj.c (varobj_create): Update.
	* valops.c (value_of_this): Update.
	* tracepoint.c (add_local_symbols, scope_info): Update.
	* symtab.h (struct general_symbol_info) <block>: Now const.
	* symtab.c (skip_prologue_sal)
	(default_make_symbol_completion_list_break_on)
	(skip_prologue_using_sal): Update.
	* stack.h (iterate_over_block_locals)
	(iterate_over_block_local_vars): Update.
	* stack.c (print_frame_args): Update.
	(iterate_over_block_locals, iterate_over_block_local_vars): Make
	parameter const.
	(get_selected_block): Make return type const.
	* python/py-frame.c (frapy_block): Update.
	* python/py-block.c (gdbpy_block_for_pc): Update.
	* p-exp.y (%union) <bval>: Now const.
	* mi/mi-cmd-stack.c (list_args_or_locals): Update.
	* mdebugread.c (mylookup_symbol, parse_procedure): Update.
	* m2-exp.y (%union) <bval>: Now const.
	* linespec.c (get_current_search_block): Make return type const.
	(create_sals_line_offset, find_label_symbols): Update.
	* inline-frame.c (inline_frame_sniffer, skip_inline_frames):
	Update.
	(block_starting_point_at): Make "block" const.
	* infrun.c (insert_exception_resume_breakpoint): Make "b" const.
	(check_exception_resume): Update.
	* guile/scm-frame.c (gdbscm_frame_block): Update.
	* guile/scm-block.c (gdbscm_lookup_block): Update.
	* frame.h (get_frame_block): Update.
	(get_selected_block): Make return type const.
	* frame.c (frame_id_inner): Update.
	* f-valprint.c (info_common_command_for_block)
	(info_common_command): Update.
	* dwarf2loc.c (dwarf2_find_location_expression)
	(dwarf_expr_frame_base, dwarf2_compile_expr_to_ax)
	(locexpr_describe_location_piece): Update.
	* c-exp.y (%union) <bval>: Now const.
	* breakpoint.c (resolve_sal_pc): Update.
	* blockframe.c (get_frame_block):Make return type const.
	(get_pc_function_start, get_frame_function, find_pc_sect_function)
	(block_innermost_frame): Update.
	* block.h (blockvector_for_pc, blockvector_for_pc_sect)
	(block_for_pc, block_for_pc_sect): Update.
	* block.c (blockvector_for_pc_sect, blockvector_for_pc): Make
	'pblock' const.
	(block_for_pc_sect, block_for_pc): Make return type const.
	* ax-gdb.c (gen_expr): Update.
	* alpha-mdebug-tdep.c (find_proc_desc): Update.
	* ada-lang.c (ada_read_renaming_var_value): Make 'block' const.
	(ada_make_symbol_completion_list, ada_add_exceptions_from_frame)
	(ada_read_var_value): Update.
	* ada-exp.y (struct name_info) <block>: Now const.
	(%union): Likewise.
	(block_lookup): Constify.
2014-06-18 08:16:52 -06:00

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/* Scheme interface to blocks.
Copyright (C) 2008-2014 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 "dictionary.h"
#include "objfiles.h"
#include "source.h"
#include "symtab.h"
#include "guile-internal.h"
/* A smob describing a gdb block. */
typedef struct _block_smob
{
/* This always appears first.
We want blocks to be eq?-able. And we need to be able to invalidate
blocks when the associated objfile is deleted. */
eqable_gdb_smob base;
/* The GDB block structure that represents a frame's code block. */
const struct block *block;
/* The backing object file. There is no direct relationship in GDB
between a block and an object file. When a block is created also
store a pointer to the object file for later use. */
struct objfile *objfile;
} block_smob;
/* To iterate over block symbols from Scheme we need to store
struct block_iterator somewhere. This is stored in the "progress" field
of <gdb:iterator>. We store the block object in iterator_smob.object,
so we don't store it here.
Remember: While iterating over block symbols, you must continually check
whether the block is still valid. */
typedef struct
{
/* This always appears first. */
gdb_smob base;
/* The iterator for that block. */
struct block_iterator iter;
/* Has the iterator been initialized flag. */
int initialized_p;
} block_syms_progress_smob;
static const char block_smob_name[] = "gdb:block";
static const char block_syms_progress_smob_name[] = "gdb:block-symbols-iterator";
/* The tag Guile knows the block smobs by. */
static scm_t_bits block_smob_tag;
static scm_t_bits block_syms_progress_smob_tag;
/* The "next!" block syms iterator method. */
static SCM bkscm_next_symbol_x_proc;
static const struct objfile_data *bkscm_objfile_data_key;
/* Administrivia for block smobs. */
/* Helper function to hash a block_smob. */
static hashval_t
bkscm_hash_block_smob (const void *p)
{
const block_smob *b_smob = p;
return htab_hash_pointer (b_smob->block);
}
/* Helper function to compute equality of block_smobs. */
static int
bkscm_eq_block_smob (const void *ap, const void *bp)
{
const block_smob *a = ap;
const block_smob *b = bp;
return (a->block == b->block
&& a->block != NULL);
}
/* Return the struct block pointer -> SCM mapping table.
It is created if necessary. */
static htab_t
bkscm_objfile_block_map (struct objfile *objfile)
{
htab_t htab = objfile_data (objfile, bkscm_objfile_data_key);
if (htab == NULL)
{
htab = gdbscm_create_eqable_gsmob_ptr_map (bkscm_hash_block_smob,
bkscm_eq_block_smob);
set_objfile_data (objfile, bkscm_objfile_data_key, htab);
}
return htab;
}
/* The smob "free" function for <gdb:block>. */
static size_t
bkscm_free_block_smob (SCM self)
{
block_smob *b_smob = (block_smob *) SCM_SMOB_DATA (self);
if (b_smob->block != NULL)
{
htab_t htab = bkscm_objfile_block_map (b_smob->objfile);
gdbscm_clear_eqable_gsmob_ptr_slot (htab, &b_smob->base);
}
/* Not necessary, done to catch bugs. */
b_smob->block = NULL;
b_smob->objfile = NULL;
return 0;
}
/* The smob "print" function for <gdb:block>. */
static int
bkscm_print_block_smob (SCM self, SCM port, scm_print_state *pstate)
{
block_smob *b_smob = (block_smob *) SCM_SMOB_DATA (self);
const struct block *b = b_smob->block;
gdbscm_printf (port, "#<%s", block_smob_name);
if (BLOCK_SUPERBLOCK (b) == NULL)
gdbscm_printf (port, " global");
else if (BLOCK_SUPERBLOCK (BLOCK_SUPERBLOCK (b)) == NULL)
gdbscm_printf (port, " static");
if (BLOCK_FUNCTION (b) != NULL)
gdbscm_printf (port, " %s", SYMBOL_PRINT_NAME (BLOCK_FUNCTION (b)));
gdbscm_printf (port, " %s-%s",
hex_string (BLOCK_START (b)), hex_string (BLOCK_END (b)));
scm_puts (">", port);
scm_remember_upto_here_1 (self);
/* Non-zero means success. */
return 1;
}
/* Low level routine to create a <gdb:block> object. */
static SCM
bkscm_make_block_smob (void)
{
block_smob *b_smob = (block_smob *)
scm_gc_malloc (sizeof (block_smob), block_smob_name);
SCM b_scm;
b_smob->block = NULL;
b_smob->objfile = NULL;
b_scm = scm_new_smob (block_smob_tag, (scm_t_bits) b_smob);
gdbscm_init_eqable_gsmob (&b_smob->base, b_scm);
return b_scm;
}
/* Returns non-zero if SCM is a <gdb:block> object. */
static int
bkscm_is_block (SCM scm)
{
return SCM_SMOB_PREDICATE (block_smob_tag, scm);
}
/* (block? scm) -> boolean */
static SCM
gdbscm_block_p (SCM scm)
{
return scm_from_bool (bkscm_is_block (scm));
}
/* Return the existing object that encapsulates BLOCK, or create a new
<gdb:block> object. */
SCM
bkscm_scm_from_block (const struct block *block, struct objfile *objfile)
{
htab_t htab;
eqable_gdb_smob **slot;
block_smob *b_smob, b_smob_for_lookup;
SCM b_scm;
/* If we've already created a gsmob for this block, return it.
This makes blocks eq?-able. */
htab = bkscm_objfile_block_map (objfile);
b_smob_for_lookup.block = block;
slot = gdbscm_find_eqable_gsmob_ptr_slot (htab, &b_smob_for_lookup.base);
if (*slot != NULL)
return (*slot)->containing_scm;
b_scm = bkscm_make_block_smob ();
b_smob = (block_smob *) SCM_SMOB_DATA (b_scm);
b_smob->block = block;
b_smob->objfile = objfile;
gdbscm_fill_eqable_gsmob_ptr_slot (slot, &b_smob->base);
return b_scm;
}
/* Returns the <gdb:block> object in SELF.
Throws an exception if SELF is not a <gdb:block> object. */
static SCM
bkscm_get_block_arg_unsafe (SCM self, int arg_pos, const char *func_name)
{
SCM_ASSERT_TYPE (bkscm_is_block (self), self, arg_pos, func_name,
block_smob_name);
return self;
}
/* Returns a pointer to the block smob of SELF.
Throws an exception if SELF is not a <gdb:block> object. */
static block_smob *
bkscm_get_block_smob_arg_unsafe (SCM self, int arg_pos, const char *func_name)
{
SCM b_scm = bkscm_get_block_arg_unsafe (self, arg_pos, func_name);
block_smob *b_smob = (block_smob *) SCM_SMOB_DATA (b_scm);
return b_smob;
}
/* Returns non-zero if block B_SMOB is valid. */
static int
bkscm_is_valid (block_smob *b_smob)
{
return b_smob->block != NULL;
}
/* Returns the block smob in SELF, verifying it's valid.
Throws an exception if SELF is not a <gdb:block> object or is invalid. */
static block_smob *
bkscm_get_valid_block_smob_arg_unsafe (SCM self, int arg_pos,
const char *func_name)
{
block_smob *b_smob
= bkscm_get_block_smob_arg_unsafe (self, arg_pos, func_name);
if (!bkscm_is_valid (b_smob))
{
gdbscm_invalid_object_error (func_name, arg_pos, self,
_("<gdb:block>"));
}
return b_smob;
}
/* Returns the block smob contained in SCM or NULL if SCM is not a
<gdb:block> object.
If there is an error a <gdb:exception> object is stored in *EXCP. */
static block_smob *
bkscm_get_valid_block (SCM scm, int arg_pos, const char *func_name, SCM *excp)
{
block_smob *b_smob;
if (!bkscm_is_block (scm))
{
*excp = gdbscm_make_type_error (func_name, arg_pos, scm,
block_smob_name);
return NULL;
}
b_smob = (block_smob *) SCM_SMOB_DATA (scm);
if (!bkscm_is_valid (b_smob))
{
*excp = gdbscm_make_invalid_object_error (func_name, arg_pos, scm,
_("<gdb:block>"));
return NULL;
}
return b_smob;
}
/* Returns the struct block that is wrapped by BLOCK_SCM.
If BLOCK_SCM is not a block, or is an invalid block, then NULL is returned
and a <gdb:exception> object is stored in *EXCP. */
const struct block *
bkscm_scm_to_block (SCM block_scm, int arg_pos, const char *func_name,
SCM *excp)
{
block_smob *b_smob;
b_smob = bkscm_get_valid_block (block_scm, arg_pos, func_name, excp);
if (b_smob != NULL)
return b_smob->block;
return NULL;
}
/* Helper function for bkscm_del_objfile_blocks to mark the block
as invalid. */
static int
bkscm_mark_block_invalid (void **slot, void *info)
{
block_smob *b_smob = (block_smob *) *slot;
b_smob->block = NULL;
b_smob->objfile = NULL;
return 1;
}
/* This function is called when an objfile is about to be freed.
Invalidate the block as further actions on the block would result
in bad data. All access to b_smob->block should be gated by
checks to ensure the block is (still) valid. */
static void
bkscm_del_objfile_blocks (struct objfile *objfile, void *datum)
{
htab_t htab = datum;
if (htab != NULL)
{
htab_traverse_noresize (htab, bkscm_mark_block_invalid, NULL);
htab_delete (htab);
}
}
/* Block methods. */
/* (block-valid? <gdb:block>) -> boolean
Returns #t if SELF still exists in GDB. */
static SCM
gdbscm_block_valid_p (SCM self)
{
block_smob *b_smob
= bkscm_get_block_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
return scm_from_bool (bkscm_is_valid (b_smob));
}
/* (block-start <gdb:block>) -> address */
static SCM
gdbscm_block_start (SCM self)
{
block_smob *b_smob
= bkscm_get_valid_block_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
const struct block *block = b_smob->block;
return gdbscm_scm_from_ulongest (BLOCK_START (block));
}
/* (block-end <gdb:block>) -> address */
static SCM
gdbscm_block_end (SCM self)
{
block_smob *b_smob
= bkscm_get_valid_block_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
const struct block *block = b_smob->block;
return gdbscm_scm_from_ulongest (BLOCK_END (block));
}
/* (block-function <gdb:block>) -> <gdb:symbol> */
static SCM
gdbscm_block_function (SCM self)
{
block_smob *b_smob
= bkscm_get_valid_block_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
const struct block *block = b_smob->block;
struct symbol *sym;
sym = BLOCK_FUNCTION (block);
if (sym != NULL)
return syscm_scm_from_symbol (sym);
return SCM_BOOL_F;
}
/* (block-superblock <gdb:block>) -> <gdb:block> */
static SCM
gdbscm_block_superblock (SCM self)
{
block_smob *b_smob
= bkscm_get_valid_block_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
const struct block *block = b_smob->block;
const struct block *super_block;
super_block = BLOCK_SUPERBLOCK (block);
if (super_block)
return bkscm_scm_from_block (super_block, b_smob->objfile);
return SCM_BOOL_F;
}
/* (block-global-block <gdb:block>) -> <gdb:block>
Returns the global block associated to this block. */
static SCM
gdbscm_block_global_block (SCM self)
{
block_smob *b_smob
= bkscm_get_valid_block_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
const struct block *block = b_smob->block;
const struct block *global_block;
global_block = block_global_block (block);
return bkscm_scm_from_block (global_block, b_smob->objfile);
}
/* (block-static-block <gdb:block>) -> <gdb:block>
Returns the static block associated to this block.
Returns #f if we cannot get the static block (this is the global block). */
static SCM
gdbscm_block_static_block (SCM self)
{
block_smob *b_smob
= bkscm_get_valid_block_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
const struct block *block = b_smob->block;
const struct block *static_block;
if (BLOCK_SUPERBLOCK (block) == NULL)
return SCM_BOOL_F;
static_block = block_static_block (block);
return bkscm_scm_from_block (static_block, b_smob->objfile);
}
/* (block-global? <gdb:block>) -> boolean
Returns #t if this block object is a global block. */
static SCM
gdbscm_block_global_p (SCM self)
{
block_smob *b_smob
= bkscm_get_valid_block_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
const struct block *block = b_smob->block;
return scm_from_bool (BLOCK_SUPERBLOCK (block) == NULL);
}
/* (block-static? <gdb:block>) -> boolean
Returns #t if this block object is a static block. */
static SCM
gdbscm_block_static_p (SCM self)
{
block_smob *b_smob
= bkscm_get_valid_block_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
const struct block *block = b_smob->block;
if (BLOCK_SUPERBLOCK (block) != NULL
&& BLOCK_SUPERBLOCK (BLOCK_SUPERBLOCK (block)) == NULL)
return SCM_BOOL_T;
return SCM_BOOL_F;
}
/* (block-symbols <gdb:block>) -> list of <gdb:symbol objects
Returns a list of symbols of the block. */
static SCM
gdbscm_block_symbols (SCM self)
{
block_smob *b_smob
= bkscm_get_valid_block_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
const struct block *block = b_smob->block;
struct block_iterator iter;
struct symbol *sym;
SCM result;
result = SCM_EOL;
sym = block_iterator_first (block, &iter);
while (sym != NULL)
{
SCM s_scm = syscm_scm_from_symbol (sym);
result = scm_cons (s_scm, result);
sym = block_iterator_next (&iter);
}
return scm_reverse_x (result, SCM_EOL);
}
/* The <gdb:block-symbols-iterator> object,
for iterating over all symbols in a block. */
/* The smob "print" function for <gdb:block-symbols-iterator>. */
static int
bkscm_print_block_syms_progress_smob (SCM self, SCM port,
scm_print_state *pstate)
{
block_syms_progress_smob *i_smob
= (block_syms_progress_smob *) SCM_SMOB_DATA (self);
gdbscm_printf (port, "#<%s", block_syms_progress_smob_name);
if (i_smob->initialized_p)
{
switch (i_smob->iter.which)
{
case GLOBAL_BLOCK:
case STATIC_BLOCK:
{
struct symtab *s;
gdbscm_printf (port, " %s",
i_smob->iter.which == GLOBAL_BLOCK
? "global" : "static");
if (i_smob->iter.idx != -1)
gdbscm_printf (port, " @%d", i_smob->iter.idx);
s = (i_smob->iter.idx == -1
? i_smob->iter.d.symtab
: i_smob->iter.d.symtab->includes[i_smob->iter.idx]);
gdbscm_printf (port, " %s", symtab_to_filename_for_display (s));
break;
}
case FIRST_LOCAL_BLOCK:
gdbscm_printf (port, " single block");
break;
}
}
else
gdbscm_printf (port, " !initialized");
scm_puts (">", port);
scm_remember_upto_here_1 (self);
/* Non-zero means success. */
return 1;
}
/* Low level routine to create a <gdb:block-symbols-progress> object. */
static SCM
bkscm_make_block_syms_progress_smob (void)
{
block_syms_progress_smob *i_smob = (block_syms_progress_smob *)
scm_gc_malloc (sizeof (block_syms_progress_smob),
block_syms_progress_smob_name);
SCM smob;
memset (&i_smob->iter, 0, sizeof (i_smob->iter));
i_smob->initialized_p = 0;
smob = scm_new_smob (block_syms_progress_smob_tag, (scm_t_bits) i_smob);
gdbscm_init_gsmob (&i_smob->base);
return smob;
}
/* Returns non-zero if SCM is a <gdb:block-symbols-progress> object. */
static int
bkscm_is_block_syms_progress (SCM scm)
{
return SCM_SMOB_PREDICATE (block_syms_progress_smob_tag, scm);
}
/* (block-symbols-progress? scm) -> boolean */
static SCM
bkscm_block_syms_progress_p (SCM scm)
{
return scm_from_bool (bkscm_is_block_syms_progress (scm));
}
/* (make-block-symbols-iterator <gdb:block>) -> <gdb:iterator>
Return a <gdb:iterator> object for iterating over the symbols of SELF. */
static SCM
gdbscm_make_block_syms_iter (SCM self)
{
block_smob *b_smob
= bkscm_get_valid_block_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
const struct block *block = b_smob->block;
SCM progress, iter;
progress = bkscm_make_block_syms_progress_smob ();
iter = gdbscm_make_iterator (self, progress, bkscm_next_symbol_x_proc);
return iter;
}
/* Returns the next symbol in the iteration through the block's dictionary,
or (end-of-iteration).
This is the iterator_smob.next_x method. */
static SCM
gdbscm_block_next_symbol_x (SCM self)
{
SCM progress, iter_scm, block_scm;
iterator_smob *iter_smob;
block_smob *b_smob;
const struct block *block;
block_syms_progress_smob *p_smob;
struct symbol *sym;
iter_scm = itscm_get_iterator_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
iter_smob = (iterator_smob *) SCM_SMOB_DATA (iter_scm);
block_scm = itscm_iterator_smob_object (iter_smob);
b_smob = bkscm_get_valid_block_smob_arg_unsafe (block_scm,
SCM_ARG1, FUNC_NAME);
block = b_smob->block;
progress = itscm_iterator_smob_progress (iter_smob);
SCM_ASSERT_TYPE (bkscm_is_block_syms_progress (progress),
progress, SCM_ARG1, FUNC_NAME,
block_syms_progress_smob_name);
p_smob = (block_syms_progress_smob *) SCM_SMOB_DATA (progress);
if (!p_smob->initialized_p)
{
sym = block_iterator_first (block, &p_smob->iter);
p_smob->initialized_p = 1;
}
else
sym = block_iterator_next (&p_smob->iter);
if (sym == NULL)
return gdbscm_end_of_iteration ();
return syscm_scm_from_symbol (sym);
}
/* (lookup-block address) -> <gdb:block>
Returns the innermost lexical block containing the specified pc value,
or #f if there is none. */
static SCM
gdbscm_lookup_block (SCM pc_scm)
{
CORE_ADDR pc;
const struct block *block = NULL;
struct obj_section *section = NULL;
struct symtab *symtab = NULL;
volatile struct gdb_exception except;
gdbscm_parse_function_args (FUNC_NAME, SCM_ARG1, NULL, "U", pc_scm, &pc);
TRY_CATCH (except, RETURN_MASK_ALL)
{
section = find_pc_mapped_section (pc);
symtab = find_pc_sect_symtab (pc, section);
if (symtab != NULL && symtab->objfile != NULL)
block = block_for_pc (pc);
}
GDBSCM_HANDLE_GDB_EXCEPTION (except);
if (symtab == NULL || symtab->objfile == NULL)
{
gdbscm_out_of_range_error (FUNC_NAME, SCM_ARG1, pc_scm,
_("cannot locate object file for block"));
}
if (block != NULL)
return bkscm_scm_from_block (block, symtab->objfile);
return SCM_BOOL_F;
}
/* Initialize the Scheme block support. */
static const scheme_function block_functions[] =
{
{ "block?", 1, 0, 0, gdbscm_block_p,
"\
Return #t if the object is a <gdb:block> object." },
{ "block-valid?", 1, 0, 0, gdbscm_block_valid_p,
"\
Return #t if the block is valid.\n\
A block becomes invalid when its objfile is freed." },
{ "block-start", 1, 0, 0, gdbscm_block_start,
"\
Return the start address of the block." },
{ "block-end", 1, 0, 0, gdbscm_block_end,
"\
Return the end address of the block." },
{ "block-function", 1, 0, 0, gdbscm_block_function,
"\
Return the gdb:symbol object of the function containing the block\n\
or #f if the block does not live in any function." },
{ "block-superblock", 1, 0, 0, gdbscm_block_superblock,
"\
Return the superblock (parent block) of the block." },
{ "block-global-block", 1, 0, 0, gdbscm_block_global_block,
"\
Return the global block of the block." },
{ "block-static-block", 1, 0, 0, gdbscm_block_static_block,
"\
Return the static block of the block." },
{ "block-global?", 1, 0, 0, gdbscm_block_global_p,
"\
Return #t if block is a global block." },
{ "block-static?", 1, 0, 0, gdbscm_block_static_p,
"\
Return #t if block is a static block." },
{ "block-symbols", 1, 0, 0, gdbscm_block_symbols,
"\
Return a list of all symbols (as <gdb:symbol> objects) in the block." },
{ "make-block-symbols-iterator", 1, 0, 0, gdbscm_make_block_syms_iter,
"\
Return a <gdb:iterator> object for iterating over all symbols in the block." },
{ "block-symbols-progress?", 1, 0, 0, bkscm_block_syms_progress_p,
"\
Return #t if the object is a <gdb:block-symbols-progress> object." },
{ "lookup-block", 1, 0, 0, gdbscm_lookup_block,
"\
Return the innermost GDB block containing the address or #f if none found.\n\
\n\
Arguments:\n\
address: the address to lookup" },
END_FUNCTIONS
};
void
gdbscm_initialize_blocks (void)
{
block_smob_tag
= gdbscm_make_smob_type (block_smob_name, sizeof (block_smob));
scm_set_smob_free (block_smob_tag, bkscm_free_block_smob);
scm_set_smob_print (block_smob_tag, bkscm_print_block_smob);
block_syms_progress_smob_tag
= gdbscm_make_smob_type (block_syms_progress_smob_name,
sizeof (block_syms_progress_smob));
scm_set_smob_print (block_syms_progress_smob_tag,
bkscm_print_block_syms_progress_smob);
gdbscm_define_functions (block_functions, 1);
/* This function is "private". */
bkscm_next_symbol_x_proc
= scm_c_define_gsubr ("%block-next-symbol!", 1, 0, 0,
gdbscm_block_next_symbol_x);
scm_set_procedure_property_x (bkscm_next_symbol_x_proc,
gdbscm_documentation_symbol,
gdbscm_scm_from_c_string ("\
Internal function to assist the block symbols iterator."));
/* Register an objfile "free" callback so we can properly
invalidate blocks when an object file is about to be deleted. */
bkscm_objfile_data_key
= register_objfile_data_with_cleanup (NULL, bkscm_del_objfile_blocks);
}