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Split create-breakpoint! into make-breakpoint, register-breakpoint!.

Browse Source 
Rename breakpoint-delete! to delete-breakpoint!.

	* guile/scm-breakpoint.c (struct gdbscm_breakpoint_object): New members
	is_scheme_bkpt, spec.
	(bpscm_make_breakpoint_smob): Initialize new members.
	(gdbscm_create_breakpoint_x): Split into two ...
	(gdbscm_make_breakpoint, gdbscm_register_breakpoint_x): New functions.
	(bpscm_breakpoint_deleted): Reset breakpoint number and stop function.
	(scheme_function breakpoint_functions): Update.
	* guile/lib/gdb.scm: Delete create-breakpoint!.  Rename
	breakpoint-delete! to delete-breakpoint!.  Add make-breakpoint,
	register-breakpoint!.

	testsuite/
	* gdb.guile/scm-breakpoint.exp: Update.
	Add tests for breakpoint registration.

	doc/
	* guile.texi (Breakpoints In Guile): Update.
This commit is contained in:
Doug Evans 2014-06-04 19:44:30 -07:00
parent c5cad97c38
commit 16f691fb2e
7 changed files with 270 additions and 48 deletions
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13
gdb/ChangeLog
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@ -1,3 +1,16 @@
2014-06-04 Doug Evans <xdje42@gmail.com>
* guile/scm-breakpoint.c (struct gdbscm_breakpoint_object): New members
is_scheme_bkpt, spec.
(bpscm_make_breakpoint_smob): Initialize new members.
(gdbscm_create_breakpoint_x): Split into two ...
(gdbscm_make_breakpoint, gdbscm_register_breakpoint_x): New functions.
(bpscm_breakpoint_deleted): Reset breakpoint number and stop function.
(scheme_function breakpoint_functions): Update.
* guile/lib/gdb.scm: Delete create-breakpoint!. Rename
breakpoint-delete! to delete-breakpoint!. Add make-breakpoint,
register-breakpoint!.
2014-06-04 Joel Brobecker <brobecker@adacorer.com>
PR server/17023

4
gdb/doc/ChangeLog
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@ -1,3 +1,7 @@
2014-06-04 Doug Evans <xdje42@gmail.com>
* guile.texi (Breakpoints In Guile): Update.
2014-06-03 Joel Brobecker <brobecker@adacore.com>
* python.texi (Xmethod API): Fix reference to "Progspaces In

47
gdb/doc/guile.texi
View File

@ -2899,18 +2899,30 @@ object will be @code{#f} and 0 respectively.
@tindex <gdb:breakpoint>
Breakpoints in Guile are represented by objects of type
@code{<gdb:breakpoint>}.
@code{<gdb:breakpoint>}. New breakpoints can be created with the
@code{make-breakpoint} Guile function, and then added to @value{GDBN} with the
@code{register-breakpoint!} Guile function.
This two-step approach is taken to separate out the side-effect of adding
the breakpoint to @value{GDBN} from @code{make-breakpoint}.
Support is also provided to view and manipulate breakpoints created
outside of Guile.
The following breakpoint-related procedures are provided by the
@code{(gdb)} module:
@c TODO: line length
@deffn {Scheme Procedure} create-breakpoint! location @r{[}#:type type@r{]} @r{[}#:wp-class wp-class@r{]} @r{[}#:internal internal@r{]}
Create a new breakpoint according to @var{spec}, a string naming the
@deffn {Scheme Procedure} make-breakpoint location @r{[}#:type type@r{]} @r{[}#:wp-class wp-class@r{]} @r{[}#:internal internal@r{]}
Create a new breakpoint at @var{location}, a string naming the
location of the breakpoint, or an expression that defines a watchpoint.
The contents can be any location recognized by the @code{break} command,
or in the case of a watchpoint, by the @code{watch} command.
The breakpoint is initially marked as @samp{invalid}.
The breakpoint is not usable until it has been registered with @value{GDBN}
with @code{register-breakpoint!}, at which point it becomes @samp{valid}.
The result is the @code{<gdb:breakpoint>} object representing the breakpoint.
The optional @var{type} denotes the breakpoint to create.
This argument can be either @code{BP_BREAKPOINT} or @code{BP_WATCHPOINT},
and defaults to @code{BP_BREAKPOINT}.
@ -2921,7 +2933,7 @@ not provided, it is assumed to be a @code{WP_WRITE} class.
The optional @var{internal} argument allows the breakpoint to become
invisible to the user. The breakpoint will neither be reported when
created, nor will it be listed in the output from @code{info breakpoints}
registered, nor will it be listed in the output from @code{info breakpoints}
(but will be listed with the @code{maint info breakpoints} command).
If an internal flag is not provided, the breakpoint is visible
(non-internal).
@ -2972,10 +2984,24 @@ Read/Write watchpoint.
@end deffn
@deffn {Scheme Procedure} breakpoint-delete! breakpoint
Permanently delete @var{breakpoint}. This also invalidates the
Guile @var{breakpoint} object. Any further attempt to access the
object will throw an exception.
@deffn {Scheme Procedure} register-breakpoint! breakpoint
Add @var{breakpoint}, a @code{<gdb:breakpoint>} object, to @value{GDBN}'s
list of breakpoints. The breakpoint must have been created with
@code{make-breakpoint}. One cannot register breakpoints that have been
created outside of Guile. Once a breakpoint is registered it becomes
@samp{valid}.
It is an error to register an already registered breakpoint.
The result is unspecified.
@end deffn
@deffn {Scheme Procedure} delete-breakpoint! breakpoint
Remove @var{breakpoint} from @value{GDBN}'s list of breakpoints.
This also invalidates the Guile @var{breakpoint} object.
Any further attempt to access the object will throw an exception.
If @var{breakpoint} was created from Guile with @code{make-breakpoint}
it may be re-registered with @value{GDBN}, in which case the breakpoint
becomes valid again.
@end deffn
@deffn {Scheme Procedure} breakpoints
@ -2990,6 +3016,8 @@ and @code{#f} otherwise.
@deffn {Scheme Procedure} breakpoint-valid? breakpoint
Return @code{#t} if @var{breakpoint} is valid, @code{#f} otherwise.
Breakpoints created with @code{make-breakpoint} are marked as invalid
until they are registered with @value{GDBN} with @code{register-breakpoint!}.
A @code{<gdb:breakpoint>} object can become invalid
if the user deletes the breakpoint. In this case, the object still
exists, but the underlying breakpoint does not. In the cases of
@ -3129,7 +3157,8 @@ Example @code{stop} implementation:
(define (my-stop? bkpt)
(let ((int-val (parse-and-eval "foo")))
(value=? int-val 3)))
(define bkpt (create-breakpoint! "main.c:42"))
(define bkpt (make-breakpoint "main.c:42"))
(register-breakpoint! bkpt)
(set-breakpoint-stop! bkpt my-stop?)
@end smallexample
@end deffn

3
gdb/guile/lib/gdb.scm
View File

@ -114,7 +114,8 @@
WP_ACCESS
make-breakpoint
breakpoint-delete!
register-breakpoint!
delete-breakpoint!
breakpoints
breakpoint?
breakpoint-valid?

171
gdb/guile/scm-breakpoint.c
View File

@ -34,18 +34,51 @@
#include "guile-internal.h"
/* The <gdb:breakpoint> smob.
N.B.: The name of this struct is known to breakpoint.h. */
N.B.: The name of this struct is known to breakpoint.h.
Note: Breakpoints are added to gdb using a two step process:
1) Call make-breakpoint to create a <gdb:breakpoint> object.
2) Call register-breakpoint! to add the breakpoint to gdb.
It is done this way so that the constructor, make-breakpoint, doesn't have
any side-effects. This means that the smob needs to store everything
that was passed to make-breakpoint. */
typedef struct gdbscm_breakpoint_object
{
/* This always appears first. */
gdb_smob base;
/* Non-zero if this breakpoint was created with make-breakpoint. */
int is_scheme_bkpt;
/* For breakpoints created with make-breakpoint, these are the parameters
that were passed to make-breakpoint. These values are not used except
to register the breakpoint with GDB. */
struct
{
/* The string representation of the breakpoint.
Space for this lives in GC space. */
char *location;
/* The kind of breakpoint.
At the moment this can only be one of bp_breakpoint, bp_watchpoint. */
enum bptype type;
/* If a watchpoint, the kind of watchpoint. */
enum target_hw_bp_type access_type;
/* Non-zero if the breakpoint is an "internal" breakpoint. */
int is_internal;
} spec;
/* The breakpoint number according to gdb.
For breakpoints created from Scheme, this has the value -1 until the
breakpoint is registered with gdb.
This is recorded here because BP will be NULL when deleted. */
int number;
/* The gdb breakpoint object, or NULL if the breakpoint has been deleted. */
/* The gdb breakpoint object, or NULL if the breakpoint has not been
registered yet, or has been deleted. */
struct breakpoint *bp;
/* Backlink to our containing <gdb:breakpoint> smob.
@ -171,8 +204,8 @@ bpscm_make_breakpoint_smob (void)
scm_gc_malloc (sizeof (breakpoint_smob), breakpoint_smob_name);
SCM bp_scm;
memset (bp_smob, 0, sizeof (*bp_smob));
bp_smob->number = -1;
bp_smob->bp = NULL;
bp_smob->stop = SCM_BOOL_F;
bp_scm = scm_new_smob (breakpoint_smob_tag, (scm_t_bits) bp_smob);
bp_smob->containing_scm = bp_scm;
@ -293,42 +326,111 @@ bpscm_get_valid_breakpoint_smob_arg_unsafe (SCM self, int arg_pos,
/* Breakpoint methods. */
/* (create-breakpoint! string [#:type integer] [#:wp-class integer]
[#:internal boolean) -> <gdb:breakpoint> */
/* (make-breakpoint string [#:type integer] [#:wp-class integer]
[#:internal boolean) -> <gdb:breakpoint>
The result is the <gdb:breakpoint> Scheme object.
The breakpoint is not available to be used yet, however.
It must still be added to gdb with register-breakpoint!. */
static SCM
gdbscm_create_breakpoint_x (SCM spec_scm, SCM rest)
gdbscm_make_breakpoint (SCM location_scm, SCM rest)
{
const SCM keywords[] = {
type_keyword, wp_class_keyword, internal_keyword, SCM_BOOL_F
};
char *spec;
char *s;
char *location;
int type_arg_pos = -1, access_type_arg_pos = -1, internal_arg_pos = -1;
int type = bp_breakpoint;
int access_type = hw_write;
int internal = 0;
SCM result;
volatile struct gdb_exception except;
breakpoint_smob *bp_smob;
gdbscm_parse_function_args (FUNC_NAME, SCM_ARG1, keywords, "s#iit",
spec_scm, &spec, rest,
location_scm, &location, rest,
&type_arg_pos, &type,
&access_type_arg_pos, &access_type,
&internal_arg_pos, &internal);
result = bpscm_make_breakpoint_smob ();
pending_breakpoint_scm = result;
bp_smob = (breakpoint_smob *) SCM_SMOB_DATA (result);
s = location;
location = gdbscm_gc_xstrdup (s);
xfree (s);
switch (type)
{
case bp_breakpoint:
if (access_type_arg_pos > 0)
{
gdbscm_misc_error (FUNC_NAME, access_type_arg_pos,
scm_from_int (access_type),
_("access type with breakpoint is not allowed"));
}
break;
case bp_watchpoint:
switch (access_type)
{
case hw_write:
case hw_access:
case hw_read:
break;
default:
gdbscm_out_of_range_error (FUNC_NAME, access_type_arg_pos,
scm_from_int (access_type),
_("invalid watchpoint class"));
}
break;
default:
gdbscm_out_of_range_error (FUNC_NAME, access_type_arg_pos,
scm_from_int (type),
_("invalid breakpoint type"));
}
bp_smob->is_scheme_bkpt = 1;
bp_smob->spec.location = location;
bp_smob->spec.type = type;
bp_smob->spec.access_type = access_type;
bp_smob->spec.is_internal = internal;
return result;
}
/* (register-breakpoint! <gdb:breakpoint>) -> unspecified
It is an error to register a breakpoint created outside of Guile,
or an already-registered breakpoint. */
static SCM
gdbscm_register_breakpoint_x (SCM self)
{
breakpoint_smob *bp_smob
= bpscm_get_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
volatile struct gdb_exception except;
/* We only support registering breakpoints created with make-breakpoint. */
if (!bp_smob->is_scheme_bkpt)
scm_misc_error (FUNC_NAME, _("not a Scheme breakpoint"), SCM_EOL);
if (bpscm_is_valid (bp_smob))
scm_misc_error (FUNC_NAME, _("breakpoint is already registered"), SCM_EOL);
pending_breakpoint_scm = self;
TRY_CATCH (except, RETURN_MASK_ALL)
{
struct cleanup *cleanup = make_cleanup (xfree, spec);
char *location = bp_smob->spec.location;
int internal = bp_smob->spec.is_internal;
switch (type)
switch (bp_smob->spec.type)
{
case bp_breakpoint:
{
create_breakpoint (get_current_arch (),
spec, NULL, -1, NULL,
location, NULL, -1, NULL,
0,
0, bp_breakpoint,
0,
@ -339,36 +441,37 @@ gdbscm_create_breakpoint_x (SCM spec_scm, SCM rest)
}
case bp_watchpoint:
{
enum target_hw_bp_type access_type = bp_smob->spec.access_type;
if (access_type == hw_write)
watch_command_wrapper (spec, 0, internal);
watch_command_wrapper (location, 0, internal);
else if (access_type == hw_access)
awatch_command_wrapper (spec, 0, internal);
awatch_command_wrapper (location, 0, internal);
else if (access_type == hw_read)
rwatch_command_wrapper (spec, 0, internal);
rwatch_command_wrapper (location, 0, internal);
else
error (_("Invalid watchpoint access type"));
gdb_assert_not_reached ("invalid access type");
break;
}
default:
error (_("Invalid breakpoint type"));
gdb_assert_not_reached ("invalid breakpoint type");
}
do_cleanups (cleanup);
}
/* Ensure this gets reset, even if there's an error. */
pending_breakpoint_scm = SCM_BOOL_F;
GDBSCM_HANDLE_GDB_EXCEPTION (except);
return result;
return SCM_UNSPECIFIED;
}
/* (breakpoint-delete! <gdb:breakpoint>) -> unspecified
Scheme function which deletes the underlying GDB breakpoint. This
triggers the breakpoint_deleted observer which will call
gdbscm_breakpoint_deleted; that function cleans up the Scheme sections. */
/* (delete-breakpoint! <gdb:breakpoint>) -> unspecified
Scheme function which deletes (removes) the underlying GDB breakpoint
from GDB's list of breakpoints. This triggers the breakpoint_deleted
observer which will call gdbscm_breakpoint_deleted; that function cleans
up the Scheme bits. */
static SCM
gdbscm_breakpoint_delete_x (SCM self)
gdbscm_delete_breakpoint_x (SCM self)
{
breakpoint_smob *bp_smob
= bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
@ -999,6 +1102,8 @@ bpscm_breakpoint_deleted (struct breakpoint *b)
if (bp_smob)
{
bp_smob->bp = NULL;
bp_smob->number = -1;
bp_smob->stop = SCM_BOOL_F;
scm_gc_unprotect_object (bp_smob->containing_scm);
}
}
@ -1024,14 +1129,20 @@ static const scheme_integer_constant breakpoint_integer_constants[] =
static const scheme_function breakpoint_functions[] =
{
{ "create-breakpoint!", 1, 0, 1, gdbscm_create_breakpoint_x,
{ "make-breakpoint", 1, 0, 1, gdbscm_make_breakpoint,
"\
Create and install a GDB breakpoint object.\n\
Create a GDB breakpoint object.\n\
\n\
Arguments:\n\
location [#:type <type>] [#:wp-class <wp-class>] [#:internal <bool>]" },
location [#:type <type>] [#:wp-class <wp-class>] [#:internal <bool>]\n\
Returns:\n\
<gdb:breakpoint object" },
{ "breakpoint-delete!", 1, 0, 0, gdbscm_breakpoint_delete_x,
{ "register-breakpoint!", 1, 0, 0, gdbscm_register_breakpoint_x,
"\
Register a <gdb:breakpoint> object with GDB." },
{ "delete-breakpoint!", 1, 0, 0, gdbscm_delete_breakpoint_x,
"\
Delete the breakpoint from GDB." },

5
gdb/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2014-06-04 Doug Evans <xdje42@gmail.com>
* gdb.guile/scm-breakpoint.exp: Update.
Add tests for breakpoint registration.
2014-06-04 Tom Tromey <tromey@redhat.com>
* gdb.base/vla-datatypes.exp: Add tests for VLA-in-structure and

75
gdb/testsuite/gdb.guile/scm-breakpoint.exp
View File

@ -116,8 +116,10 @@ proc test_bkpt_deletion { } {
# Test breakpoints are deleted correctly.
set deltst_location [gdb_get_line_number "Break at multiply."]
set end_location [gdb_get_line_number "Break at end."]
gdb_scm_test_silent_cmd "guile (define dp1 (create-breakpoint! \"$deltst_location\"))" \
gdb_scm_test_silent_cmd "guile (define dp1 (make-breakpoint \"$deltst_location\"))" \
"create deltst breakpoint"
gdb_scm_test_silent_cmd "guile (register-breakpoint! dp1)" \
"register dp1"
gdb_breakpoint [gdb_get_line_number "Break at end."]
gdb_scm_test_silent_cmd "guile (define del-list (breakpoints))" \
"get breakpoint list 4"
@ -125,10 +127,10 @@ proc test_bkpt_deletion { } {
"= 3" "number of breakpoints before delete"
gdb_continue_to_breakpoint "Break at multiply." \
".*/$srcfile:$deltst_location.*"
gdb_scm_test_silent_cmd "guile (breakpoint-delete! dp1)" \
gdb_scm_test_silent_cmd "guile (delete-breakpoint! dp1)" \
"delete breakpoint"
gdb_test "guile (print (breakpoint-number dp1))" \
"ERROR: .*: Invalid object: <gdb:breakpoint> in position 1: #<gdb:breakpoint #2>.*" \
"ERROR: .*: Invalid object: <gdb:breakpoint> in position 1: #<gdb:breakpoint #-1>.*" \
"check breakpoint invalidated"
gdb_scm_test_silent_cmd "guile (set! del-list (breakpoints))" \
"get breakpoint list 5"
@ -151,8 +153,10 @@ proc test_bkpt_cond_and_cmds { } {
# Test conditional setting.
set bp_location1 [gdb_get_line_number "Break at multiply."]
gdb_scm_test_silent_cmd "guile (define bp1 (create-breakpoint! \"$bp_location1\"))" \
gdb_scm_test_silent_cmd "guile (define bp1 (make-breakpoint \"$bp_location1\"))" \
"create multiply breakpoint"
gdb_scm_test_silent_cmd "guile (register-breakpoint! bp1)" \
"register bp1"
gdb_continue_to_breakpoint "Break at multiply."
gdb_scm_test_silent_cmd "guile (set-breakpoint-condition! bp1 \"i == 5\")" \
"set condition"
@ -199,8 +203,10 @@ proc test_bkpt_invisible { } {
# Test invisible breakpoints.
delete_breakpoints
set ibp_location [gdb_get_line_number "Break at multiply."]
gdb_scm_test_silent_cmd "guile (define vbp (create-breakpoint! \"$ibp_location\" #:internal #f))" \
gdb_scm_test_silent_cmd "guile (define vbp1 (make-breakpoint \"$ibp_location\" #:internal #f))" \
"create visible breakpoint"
gdb_scm_test_silent_cmd "guile (register-breakpoint! vbp1)" \
"register vbp1"
gdb_scm_test_silent_cmd "guile (define vbp (car (breakpoints)))" \
"get visible breakpoint"
gdb_test "guile (print vbp)" \
@ -214,8 +220,10 @@ proc test_bkpt_invisible { } {
"scm-breakpoint\.c:$ibp_location.*" \
"check info breakpoints shows visible breakpoints"
delete_breakpoints
gdb_scm_test_silent_cmd "guile (define ibp (create-breakpoint! \"$ibp_location\" #:internal #t))" \
gdb_scm_test_silent_cmd "guile (define ibp (make-breakpoint \"$ibp_location\" #:internal #t))" \
"create invisible breakpoint"
gdb_scm_test_silent_cmd "guile (register-breakpoint! ibp)" \
"register ibp"
gdb_test "guile (print ibp)" \
"= #<gdb:breakpoint #-$decimal BP_BREAKPOINT enabled noisy hit:0 ignore:0 @.*scm-breakpoint.c:$ibp_location>" \
"check invisible bp obj exists"
@ -247,8 +255,10 @@ proc test_watchpoints { } {
return
}
gdb_scm_test_silent_cmd "guile (define wp1 (create-breakpoint! \"result\" #:type BP_WATCHPOINT #:wp-class WP_WRITE))" \
gdb_scm_test_silent_cmd "guile (define wp1 (make-breakpoint \"result\" #:type BP_WATCHPOINT #:wp-class WP_WRITE))" \
"create watchpoint"
gdb_scm_test_silent_cmd "guile (register-breakpoint! wp1)" \
"register wp1"
gdb_test "continue" \
".*\[Ww\]atchpoint.*result.*Old value = 0.*New value = 25.*main.*" \
"test watchpoint write"
@ -272,8 +282,10 @@ proc test_bkpt_internal { } {
delete_breakpoints
gdb_scm_test_silent_cmd "guile (define wp1 (create-breakpoint! \"result\" #:type BP_WATCHPOINT #:wp-class WP_WRITE #:internal #t))" \
gdb_scm_test_silent_cmd "guile (define wp1 (make-breakpoint \"result\" #:type BP_WATCHPOINT #:wp-class WP_WRITE #:internal #t))" \
"create invisible watchpoint"
gdb_scm_test_silent_cmd "guile (register-breakpoint! wp1)" \
"register wp1"
gdb_test "info breakpoints" \
"No breakpoints or watchpoints.*" \
"check info breakpoints does not show invisible watchpoint"
@ -303,6 +315,11 @@ proc test_bkpt_eval_funcs { } {
delete_breakpoints
# Define create-breakpoint! as a convenient wrapper around
# make-breakpoint, register-breakpoint!
gdb_test_no_output "guile (define (create-breakpoint! . args) (let ((bp (apply make-breakpoint args))) (register-breakpoint! bp) bp))" \
"define create-breakpoint!"
gdb_test_multiline "data collection breakpoint 1" \
"guile" "" \
"(define (make-bp-data) (cons 0 0))" "" \
@ -429,6 +446,47 @@ proc test_bkpt_eval_funcs { } {
}
}
proc test_bkpt_registration {} {
global srcfile testfile
with_test_prefix "test_bkpt_registration" {
# Start with a fresh gdb.
clean_restart ${testfile}
if ![gdb_guile_runto_main] {
return
}
# Initially there should be one breakpoint: main.
gdb_scm_test_silent_cmd "guile (define blist (breakpoints))" \
"get breakpoint list 1"
gdb_test "guile (register-breakpoint! (car blist))" \
"ERROR: .*: not a Scheme breakpoint.*" \
"try to register a non-guile breakpoint"
set bp_location1 [gdb_get_line_number "Break at multiply."]
gdb_scm_test_silent_cmd "guile (define bp1 (make-breakpoint \"$bp_location1\"))" \
"create multiply breakpoint"
gdb_test "guile (print (breakpoint-valid? bp1))" \
"= #f" "breakpoint invalid after creation"
gdb_scm_test_silent_cmd "guile (register-breakpoint! bp1)" \
"register bp1"
gdb_test "guile (print (breakpoint-valid? bp1))" \
"= #t" "breakpoint valid after registration"
gdb_test "guile (register-breakpoint! bp1)" \
"ERROR: .*: breakpoint is already registered.*" \
"re-register already registered bp1"
gdb_scm_test_silent_cmd "guile (delete-breakpoint! bp1)" \
"delete registered breakpoint"
gdb_test "guile (print (breakpoint-valid? bp1))" \
"= #f" "breakpoint invalid after deletion"
gdb_scm_test_silent_cmd "guile (register-breakpoint! bp1)" \
"re-register bp1"
gdb_test "guile (print (breakpoint-valid? bp1))" \
"= #t" "breakpoint valid after re-registration"
}
}
test_bkpt_basic
test_bkpt_deletion
test_bkpt_cond_and_cmds
@ -436,3 +494,4 @@ test_bkpt_invisible
test_watchpoints
test_bkpt_internal
test_bkpt_eval_funcs
test_bkpt_registration