--- /dev/null
+/* GDB parameters implemented in Guile.
+
+ 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/>. */
+
+#include "defs.h"
+#include "value.h"
+#include "exceptions.h"
+#include "charset.h"
+#include "gdbcmd.h"
+#include "cli/cli-decode.h"
+#include "completer.h"
+#include "language.h"
+#include "arch-utils.h"
+#include "guile-internal.h"
+
+/* A union that can hold anything described by enum var_types. */
+
+union pascm_variable
+{
+ /* Hold an integer value, for boolean and integer types. */
+ int intval;
+
+ /* Hold an auto_boolean. */
+ enum auto_boolean autoboolval;
+
+ /* Hold an unsigned integer value, for uinteger. */
+ unsigned int uintval;
+
+ /* Hold a string, for the various string types. */
+ char *stringval;
+
+ /* Hold a string, for enums. */
+ const char *cstringval;
+};
+
+/* A GDB parameter.
+
+ Note: Parameters are added to gdb using a two step process:
+ 1) Call make-parameter to create a <gdb:parameter> object.
+ 2) Call register-parameter! to add the parameter to gdb.
+ It is done this way so that the constructor, make-parameter, doesn't have
+ any side-effects. This means that the smob needs to store everything
+ that was passed to make-parameter.
+
+ N.B. There is no free function for this smob.
+ All objects pointed to by this smob must live in GC space. */
+
+typedef struct _param_smob
+{
+ /* This always appears first. */
+ gdb_smob base;
+
+ /* The parameter name. */
+ char *name;
+
+ /* The last word of the command.
+ This is needed because add_cmd requires us to allocate space
+ for it. :-( */
+ char *cmd_name;
+
+ /* One of the COMMAND_* constants. */
+ enum command_class cmd_class;
+
+ /* The type of the parameter. */
+ enum var_types type;
+
+ /* The docs for the parameter. */
+ char *set_doc;
+ char *show_doc;
+ char *doc;
+
+ /* The corresponding gdb command objects.
+ These are NULL if the parameter has not been registered yet, or
+ is no longer registered. */
+ struct cmd_list_element *set_command;
+ struct cmd_list_element *show_command;
+
+ /* The value of the parameter. */
+ union pascm_variable value;
+
+ /* For an enum parameter, the possible values. The vector lives in GC
+ space, it will be freed with the smob. */
+ const char * const *enumeration;
+
+ /* The set_func funcion or #f if not specified.
+ This function is called *after* the parameter is set.
+ It returns a string that will be displayed to the user. */
+ SCM set_func;
+
+ /* The show_func function or #f if not specified.
+ This function returns the string that is printed. */
+ SCM show_func;
+
+ /* The <gdb:parameter> object we are contained in, needed to
+ protect/unprotect the object since a reference to it comes from
+ non-gc-managed space (the command context pointer). */
+ SCM containing_scm;
+} param_smob;
+
+static const char param_smob_name[] = "gdb:parameter";
+
+/* The tag Guile knows the param smob by. */
+static scm_t_bits parameter_smob_tag;
+
+/* Keywords used by make-parameter!. */
+static SCM command_class_keyword;
+static SCM parameter_type_keyword;
+static SCM enum_list_keyword;
+static SCM set_func_keyword;
+static SCM show_func_keyword;
+static SCM doc_keyword;
+static SCM set_doc_keyword;
+static SCM show_doc_keyword;
+static SCM initial_value_keyword;
+static SCM auto_keyword;
+static SCM unlimited_keyword;
+
+static int pascm_is_valid (param_smob *);
+static const char *pascm_param_type_name (enum var_types type);
+static SCM pascm_param_value (enum var_types type, void *var,
+ int arg_pos, const char *func_name);
+\f
+/* Administrivia for parameter smobs. */
+
+static int
+pascm_print_param_smob (SCM self, SCM port, scm_print_state *pstate)
+{
+ param_smob *p_smob = (param_smob *) SCM_SMOB_DATA (self);
+ SCM value;
+
+ gdbscm_printf (port, "#<%s", param_smob_name);
+
+ gdbscm_printf (port, " %s", p_smob->name);
+
+ if (! pascm_is_valid (p_smob))
+ scm_puts (" {invalid}", port);
+
+ gdbscm_printf (port, " %s", pascm_param_type_name (p_smob->type));
+
+ value = pascm_param_value (p_smob->type, &p_smob->value,
+ GDBSCM_ARG_NONE, NULL);
+ scm_display (value, port);
+
+ scm_puts (">", port);
+
+ scm_remember_upto_here_1 (self);
+
+ /* Non-zero means success. */
+ return 1;
+}
+
+/* Create an empty (uninitialized) parameter. */
+
+static SCM
+pascm_make_param_smob (void)
+{
+ param_smob *p_smob = (param_smob *)
+ scm_gc_malloc (sizeof (param_smob), param_smob_name);
+ SCM p_scm;
+
+ memset (p_smob, 0, sizeof (*p_smob));
+ p_smob->cmd_class = no_class;
+ p_smob->type = var_boolean;
+ p_smob->set_func = SCM_BOOL_F;
+ p_smob->show_func = SCM_BOOL_F;
+ p_scm = scm_new_smob (parameter_smob_tag, (scm_t_bits) p_smob);
+ p_smob->containing_scm = p_scm;
+ gdbscm_init_gsmob (&p_smob->base);
+
+ return p_scm;
+}
+
+/* Returns non-zero if SCM is a <gdb:parameter> object. */
+
+static int
+pascm_is_parameter (SCM scm)
+{
+ return SCM_SMOB_PREDICATE (parameter_smob_tag, scm);
+}
+
+/* (gdb:parameter? scm) -> boolean */
+
+static SCM
+gdbscm_parameter_p (SCM scm)
+{
+ return scm_from_bool (pascm_is_parameter (scm));
+}
+
+/* Returns the <gdb:parameter> object in SELF.
+ Throws an exception if SELF is not a <gdb:parameter> object. */
+
+static SCM
+pascm_get_param_arg_unsafe (SCM self, int arg_pos, const char *func_name)
+{
+ SCM_ASSERT_TYPE (pascm_is_parameter (self), self, arg_pos, func_name,
+ param_smob_name);
+
+ return self;
+}
+
+/* Returns a pointer to the parameter smob of SELF.
+ Throws an exception if SELF is not a <gdb:parameter> object. */
+
+static param_smob *
+pascm_get_param_smob_arg_unsafe (SCM self, int arg_pos, const char *func_name)
+{
+ SCM p_scm = pascm_get_param_arg_unsafe (self, arg_pos, func_name);
+ param_smob *p_smob = (param_smob *) SCM_SMOB_DATA (p_scm);
+
+ return p_smob;
+}
+
+/* Return non-zero if parameter P_SMOB is valid. */
+
+static int
+pascm_is_valid (param_smob *p_smob)
+{
+ return p_smob->set_command != NULL;
+}
+\f
+/* A helper function which return the default documentation string for
+ a parameter (which is to say that it's undocumented). */
+
+static char *
+get_doc_string (void)
+{
+ return xstrdup (_("This command is not documented."));
+}
+
+/* Subroutine of pascm_set_func, pascm_show_func to simplify them.
+ Signal the error returned from calling set_func/show_func. */
+
+static void
+pascm_signal_setshow_error (SCM exception, const char *msg)
+{
+ /* Don't print the stack if this was an error signalled by the command
+ itself. */
+ if (gdbscm_user_error_p (gdbscm_exception_key (exception)))
+ {
+ char *excp_text = gdbscm_exception_message_to_string (exception);
+
+ make_cleanup (xfree, excp_text);
+ error ("%s", excp_text);
+ }
+ else
+ {
+ gdbscm_print_gdb_exception (SCM_BOOL_F, exception);
+ error ("%s", msg);
+ }
+}
+
+/* A callback function that is registered against the respective
+ add_setshow_* set_func prototype. This function will call
+ the Scheme function "set_func" which must exist.
+ Note: ARGS is always passed as NULL. */
+
+static void
+pascm_set_func (char *args, int from_tty, struct cmd_list_element *c)
+{
+ param_smob *p_smob = (param_smob *) get_cmd_context (c);
+ SCM self, result, exception;
+ char *msg;
+ struct cleanup *cleanups;
+
+ gdb_assert (gdbscm_is_procedure (p_smob->set_func));
+
+ self = p_smob->containing_scm;
+
+ result = gdbscm_safe_call_1 (p_smob->set_func, self, gdbscm_user_error_p);
+
+ if (gdbscm_is_exception (result))
+ {
+ pascm_signal_setshow_error (result,
+ _("Error occurred setting parameter."));
+ }
+
+ if (!scm_is_string (result))
+ error (_("Result of %s set-func is not a string."), p_smob->name);
+
+ msg = gdbscm_scm_to_host_string (result, NULL, &exception);
+ if (msg == NULL)
+ {
+ gdbscm_print_gdb_exception (SCM_BOOL_F, exception);
+ error (_("Error converting show text to host string."));
+ }
+
+ cleanups = make_cleanup (xfree, msg);
+ /* GDB is usually silent when a parameter is set. */
+ if (*msg != '\0')
+ fprintf_filtered (gdb_stdout, "%s\n", msg);
+ do_cleanups (cleanups);
+}
+
+/* A callback function that is registered against the respective
+ add_setshow_* show_func prototype. This function will call
+ the Scheme function "show_func" which must exist and must return a
+ string that is then printed to FILE. */
+
+static void
+pascm_show_func (struct ui_file *file, int from_tty,
+ struct cmd_list_element *c, const char *value)
+{
+ param_smob *p_smob = (param_smob *) get_cmd_context (c);
+ SCM value_scm, self, result, exception;
+ char *msg;
+ struct cleanup *cleanups;
+
+ gdb_assert (gdbscm_is_procedure (p_smob->show_func));
+
+ value_scm = gdbscm_scm_from_host_string (value, strlen (value));
+ if (gdbscm_is_exception (value_scm))
+ {
+ error (_("Error converting parameter value \"%s\" to Scheme string."),
+ value);
+ }
+ self = p_smob->containing_scm;
+
+ result = gdbscm_safe_call_2 (p_smob->show_func, self, value_scm,
+ gdbscm_user_error_p);
+
+ if (gdbscm_is_exception (result))
+ {
+ pascm_signal_setshow_error (result,
+ _("Error occurred showing parameter."));
+ }
+
+ msg = gdbscm_scm_to_host_string (result, NULL, &exception);
+ if (msg == NULL)
+ {
+ gdbscm_print_gdb_exception (SCM_BOOL_F, exception);
+ error (_("Error converting show text to host string."));
+ }
+
+ cleanups = make_cleanup (xfree, msg);
+ fprintf_filtered (file, "%s\n", msg);
+ do_cleanups (cleanups);
+}
+
+/* A helper function that dispatches to the appropriate add_setshow
+ function. */
+
+static void
+add_setshow_generic (enum var_types param_type, enum command_class cmd_class,
+ char *cmd_name, param_smob *self,
+ char *set_doc, char *show_doc, char *help_doc,
+ cmd_sfunc_ftype *set_func,
+ show_value_ftype *show_func,
+ struct cmd_list_element **set_list,
+ struct cmd_list_element **show_list,
+ struct cmd_list_element **set_cmd,
+ struct cmd_list_element **show_cmd)
+{
+ struct cmd_list_element *param = NULL;
+ const char *tmp_name = NULL;
+
+ switch (param_type)
+ {
+ case var_boolean:
+ add_setshow_boolean_cmd (cmd_name, cmd_class,
+ &self->value.intval,
+ set_doc, show_doc, help_doc,
+ set_func, show_func,
+ set_list, show_list);
+
+ break;
+
+ case var_auto_boolean:
+ add_setshow_auto_boolean_cmd (cmd_name, cmd_class,
+ &self->value.autoboolval,
+ set_doc, show_doc, help_doc,
+ set_func, show_func,
+ set_list, show_list);
+ break;
+
+ case var_uinteger:
+ add_setshow_uinteger_cmd (cmd_name, cmd_class,
+ &self->value.uintval,
+ set_doc, show_doc, help_doc,
+ set_func, show_func,
+ set_list, show_list);
+ break;
+
+ case var_zinteger:
+ add_setshow_zinteger_cmd (cmd_name, cmd_class,
+ &self->value.intval,
+ set_doc, show_doc, help_doc,
+ set_func, show_func,
+ set_list, show_list);
+ break;
+
+ case var_zuinteger:
+ add_setshow_zuinteger_cmd (cmd_name, cmd_class,
+ &self->value.uintval,
+ set_doc, show_doc, help_doc,
+ set_func, show_func,
+ set_list, show_list);
+ break;
+
+ case var_zuinteger_unlimited:
+ add_setshow_zuinteger_unlimited_cmd (cmd_name, cmd_class,
+ &self->value.intval,
+ set_doc, show_doc, help_doc,
+ set_func, show_func,
+ set_list, show_list);
+ break;
+
+ case var_string:
+ add_setshow_string_cmd (cmd_name, cmd_class,
+ &self->value.stringval,
+ set_doc, show_doc, help_doc,
+ set_func, show_func,
+ set_list, show_list);
+ break;
+
+ case var_string_noescape:
+ add_setshow_string_noescape_cmd (cmd_name, cmd_class,
+ &self->value.stringval,
+ set_doc, show_doc, help_doc,
+ set_func, show_func,
+ set_list, show_list);
+
+ break;
+
+ case var_optional_filename:
+ add_setshow_optional_filename_cmd (cmd_name, cmd_class,
+ &self->value.stringval,
+ set_doc, show_doc, help_doc,
+ set_func, show_func,
+ set_list, show_list);
+ break;
+
+ case var_filename:
+ add_setshow_filename_cmd (cmd_name, cmd_class,
+ &self->value.stringval,
+ set_doc, show_doc, help_doc,
+ set_func, show_func,
+ set_list, show_list);
+ break;
+
+ case var_enum:
+ add_setshow_enum_cmd (cmd_name, cmd_class,
+ self->enumeration,
+ &self->value.cstringval,
+ set_doc, show_doc, help_doc,
+ set_func, show_func,
+ set_list, show_list);
+ /* Initialize the value, just in case. */
+ self->value.cstringval = self->enumeration[0];
+ break;
+
+ default:
+ gdb_assert_not_reached ("bad param_type value");
+ }
+
+ /* Lookup created parameter, and register Scheme object against the
+ parameter context. Perform this task against both lists. */
+ tmp_name = cmd_name;
+ param = lookup_cmd (&tmp_name, *show_list, "", 0, 1);
+ gdb_assert (param != NULL);
+ set_cmd_context (param, self);
+ *set_cmd = param;
+
+ tmp_name = cmd_name;
+ param = lookup_cmd (&tmp_name, *set_list, "", 0, 1);
+ gdb_assert (param != NULL);
+ set_cmd_context (param, self);
+ *show_cmd = param;
+}
+
+/* Return an array of strings corresponding to the enum values for
+ ENUM_VALUES_SCM.
+ Throws an exception if there's a problem with the values.
+ Space for the result is allocated from the GC heap. */
+
+static const char * const *
+compute_enum_list (SCM enum_values_scm, int arg_pos, const char *func_name)
+{
+ long i, size;
+ char **enum_values;
+ const char * const *result;
+
+ SCM_ASSERT_TYPE (gdbscm_is_true (scm_list_p (enum_values_scm)),
+ enum_values_scm, arg_pos, func_name, _("list"));
+
+ size = scm_ilength (enum_values_scm);
+ if (size == 0)
+ {
+ gdbscm_out_of_range_error (FUNC_NAME, arg_pos, enum_values_scm,
+ _("enumeration list is empty"));
+ }
+
+ enum_values = xmalloc ((size + 1) * sizeof (char *));
+ memset (enum_values, 0, (size + 1) * sizeof (char *));
+
+ i = 0;
+ while (!scm_is_eq (enum_values_scm, SCM_EOL))
+ {
+ SCM value = scm_car (enum_values_scm);
+ SCM exception;
+
+ if (!scm_is_string (value))
+ {
+ freeargv (enum_values);
+ SCM_ASSERT_TYPE (0, value, arg_pos, func_name, _("string"));
+ }
+ enum_values[i] = gdbscm_scm_to_host_string (value, NULL, &exception);
+ if (enum_values[i] == NULL)
+ {
+ freeargv (enum_values);
+ gdbscm_throw (exception);
+ }
+ ++i;
+ enum_values_scm = scm_cdr (enum_values_scm);
+ }
+ gdb_assert (i == size);
+
+ result = gdbscm_gc_dup_argv (enum_values);
+ freeargv (enum_values);
+ return result;
+}
+
+static const scheme_integer_constant parameter_types[] =
+{
+ /* Note: var_integer is deprecated, and intentionally does not
+ appear here. */
+ { "PARAM_BOOLEAN", var_boolean }, /* ARI: var_boolean */
+ { "PARAM_AUTO_BOOLEAN", var_auto_boolean },
+ { "PARAM_ZINTEGER", var_zinteger },
+ { "PARAM_UINTEGER", var_uinteger },
+ { "PARAM_ZUINTEGER", var_zuinteger },
+ { "PARAM_ZUINTEGER_UNLIMITED", var_zuinteger_unlimited },
+ { "PARAM_STRING", var_string },
+ { "PARAM_STRING_NOESCAPE", var_string_noescape },
+ { "PARAM_OPTIONAL_FILENAME", var_optional_filename },
+ { "PARAM_FILENAME", var_filename },
+ { "PARAM_ENUM", var_enum },
+
+ END_INTEGER_CONSTANTS
+};
+
+/* Return non-zero if PARAM_TYPE is a valid parameter type. */
+
+static int
+pascm_valid_parameter_type_p (int param_type)
+{
+ int i;
+
+ for (i = 0; parameter_types[i].name != NULL; ++i)
+ {
+ if (parameter_types[i].value == param_type)
+ return 1;
+ }
+
+ return 0;
+}
+
+/* Return PARAM_TYPE as a string. */
+
+static const char *
+pascm_param_type_name (enum var_types param_type)
+{
+ int i;
+
+ for (i = 0; parameter_types[i].name != NULL; ++i)
+ {
+ if (parameter_types[i].value == param_type)
+ return parameter_types[i].name;
+ }
+
+ gdb_assert_not_reached ("bad parameter type");
+}
+
+/* Return the value of a gdb parameter as a Scheme value.
+ If TYPE is not supported, then a <gdb:exception> object is returned. */
+
+static SCM
+pascm_param_value (enum var_types type, void *var,
+ int arg_pos, const char *func_name)
+{
+ /* Note: We *could* support var_integer here in case someone is trying to get
+ the value of a Python-created parameter (which is the only place that
+ still supports var_integer). To further discourage its use we do not. */
+
+ switch (type)
+ {
+ case var_string:
+ case var_string_noescape:
+ case var_optional_filename:
+ case var_filename:
+ case var_enum:
+ {
+ char *str = * (char **) var;
+
+ if (str == NULL)
+ str = "";
+ return gdbscm_scm_from_host_string (str, strlen (str));
+ }
+
+ case var_boolean:
+ {
+ if (* (int *) var)
+ return SCM_BOOL_T;
+ else
+ return SCM_BOOL_F;
+ }
+
+ case var_auto_boolean:
+ {
+ enum auto_boolean ab = * (enum auto_boolean *) var;
+
+ if (ab == AUTO_BOOLEAN_TRUE)
+ return SCM_BOOL_T;
+ else if (ab == AUTO_BOOLEAN_FALSE)
+ return SCM_BOOL_F;
+ else
+ return auto_keyword;
+ }
+
+ case var_zuinteger_unlimited:
+ if (* (int *) var == -1)
+ return unlimited_keyword;
+ gdb_assert (* (int *) var >= 0);
+ /* Fall through. */
+ case var_zinteger:
+ return scm_from_int (* (int *) var);
+
+ case var_uinteger:
+ if (* (unsigned int *) var == UINT_MAX)
+ return unlimited_keyword;
+ /* Fall through. */
+ case var_zuinteger:
+ return scm_from_uint (* (unsigned int *) var);
+
+ default:
+ break;
+ }
+
+ return gdbscm_make_out_of_range_error (func_name, arg_pos,
+ scm_from_int (type),
+ _("program error: unhandled type"));
+}
+
+/* Set the value of a parameter of type TYPE in VAR from VALUE.
+ ENUMERATION is the list of enum values for enum parameters, otherwise NULL.
+ Throws a Scheme exception if VALUE_SCM is invalid for TYPE. */
+
+static void
+pascm_set_param_value_x (enum var_types type, union pascm_variable *var,
+ const char * const *enumeration,
+ SCM value, int arg_pos, const char *func_name)
+{
+ switch (type)
+ {
+ case var_string:
+ case var_string_noescape:
+ case var_optional_filename:
+ case var_filename:
+ SCM_ASSERT_TYPE (scm_is_string (value)
+ || (type != var_filename
+ && gdbscm_is_false (value)),
+ value, arg_pos, func_name,
+ _("string or #f for non-PARAM_FILENAME parameters"));
+ if (gdbscm_is_false (value))
+ {
+ xfree (var->stringval);
+ if (type == var_optional_filename)
+ var->stringval = xstrdup ("");
+ else
+ var->stringval = NULL;
+ }
+ else
+ {
+ char *string;
+ SCM exception;
+
+ string = gdbscm_scm_to_host_string (value, NULL, &exception);
+ if (string == NULL)
+ gdbscm_throw (exception);
+ xfree (var->stringval);
+ var->stringval = string;
+ }
+ break;
+
+ case var_enum:
+ {
+ int i;
+ char *str;
+ SCM exception;
+
+ SCM_ASSERT_TYPE (scm_is_string (value), value, arg_pos, func_name,
+ _("string"));
+ str = gdbscm_scm_to_host_string (value, NULL, &exception);
+ if (str == NULL)
+ gdbscm_throw (exception);
+ for (i = 0; enumeration[i]; ++i)
+ {
+ if (strcmp (enumeration[i], str) == 0)
+ break;
+ }
+ xfree (str);
+ if (enumeration[i] == NULL)
+ {
+ gdbscm_out_of_range_error (func_name, arg_pos, value,
+ _("not member of enumeration"));
+ }
+ var->cstringval = enumeration[i];
+ break;
+ }
+
+ case var_boolean:
+ SCM_ASSERT_TYPE (gdbscm_is_bool (value), value, arg_pos, func_name,
+ _("boolean"));
+ var->intval = gdbscm_is_true (value);
+ break;
+
+ case var_auto_boolean:
+ SCM_ASSERT_TYPE (gdbscm_is_bool (value)
+ || scm_is_eq (value, auto_keyword),
+ value, arg_pos, func_name,
+ _("boolean or #:auto"));
+ if (scm_is_eq (value, auto_keyword))
+ var->autoboolval = AUTO_BOOLEAN_AUTO;
+ else if (gdbscm_is_true (value))
+ var->autoboolval = AUTO_BOOLEAN_TRUE;
+ else
+ var->autoboolval = AUTO_BOOLEAN_FALSE;
+ break;
+
+ case var_zinteger:
+ case var_uinteger:
+ case var_zuinteger:
+ case var_zuinteger_unlimited:
+ if (type == var_uinteger
+ || type == var_zuinteger_unlimited)
+ {
+ SCM_ASSERT_TYPE (gdbscm_is_bool (value)
+ || scm_is_eq (value, unlimited_keyword),
+ value, arg_pos, func_name,
+ _("integer or #:unlimited"));
+ if (scm_is_eq (value, unlimited_keyword))
+ {
+ if (type == var_uinteger)
+ var->intval = UINT_MAX;
+ else
+ var->intval = -1;
+ break;
+ }
+ }
+ else
+ {
+ SCM_ASSERT_TYPE (scm_is_integer (value), value, arg_pos, func_name,
+ _("integer"));
+ }
+
+ if (type == var_uinteger
+ || type == var_zuinteger)
+ {
+ unsigned int u = scm_to_uint (value);
+
+ if (type == var_uinteger && u == 0)
+ u = UINT_MAX;
+ var->uintval = u;
+ }
+ else
+ {
+ int i = scm_to_int (value);
+
+ if (type == var_zuinteger_unlimited && i < -1)
+ {
+ gdbscm_out_of_range_error (func_name, arg_pos, value,
+ _("must be >= -1"));
+ }
+ var->intval = i;
+ }
+ break;
+
+ default:
+ gdb_assert_not_reached ("bad parameter type");
+ }
+}
+\f
+/* Parameter Scheme functions. */
+
+/* (make-parameter name
+ [#:command-class cmd-class] [#:parameter-type param-type]
+ [#:enum-list enum-list] [#:set-func function] [#:show-func function]
+ [#:doc <string>] [#:set-doc <string>] [#:show-doc <string>]
+ [#:initial-value initial-value]) -> <gdb:parameter>
+
+ NAME is the name of the parameter. It may consist of multiple
+ words, in which case the final word is the name of the new parameter,
+ and earlier words must be prefix commands.
+
+ CMD-CLASS is the kind of command. It should be one of the COMMAND_*
+ constants defined in the gdb module.
+
+ PARAM_TYPE is the type of the parameter. It should be one of the
+ PARAM_* constants defined in the gdb module.
+
+ If PARAM-TYPE is PARAM_ENUM, then ENUM-LIST is a list of strings that
+ are the valid values for this parameter. The first value is the default.
+
+ SET-FUNC, if provided, is called after the parameter is set.
+ It is a function of one parameter: the <gdb:parameter> object.
+ It must return a string to be displayed to the user.
+ Setting a parameter is typically a silent operation, so typically ""
+ should be returned.
+
+ SHOW-FUNC, if provided, returns the string that is printed.
+ It is a function of two parameters: the <gdb:parameter> object
+ and the current value of the parameter as a string.
+
+ DOC, SET-DOC, SHOW-DOC are the doc strings for the parameter.
+
+ INITIAL-VALUE is the initial value of the parameter.
+
+ The result is the <gdb:parameter> Scheme object.
+ The parameter is not available to be used yet, however.
+ It must still be added to gdb with register-parameter!. */
+
+static SCM
+gdbscm_make_parameter (SCM name_scm, SCM rest)
+{
+ const SCM keywords[] = {
+ command_class_keyword, parameter_type_keyword, enum_list_keyword,
+ set_func_keyword, show_func_keyword,
+ doc_keyword, set_doc_keyword, show_doc_keyword,
+ initial_value_keyword, SCM_BOOL_F
+ };
+ int cmd_class_arg_pos = -1, param_type_arg_pos = -1;
+ int enum_list_arg_pos = -1, set_func_arg_pos = -1, show_func_arg_pos = -1;
+ int doc_arg_pos = -1, set_doc_arg_pos = -1, show_doc_arg_pos = -1;
+ int initial_value_arg_pos = -1;
+ char *s;
+ char *name;
+ int cmd_class = no_class;
+ int param_type = var_boolean;
+ SCM enum_list_scm = SCM_BOOL_F;
+ SCM set_func = SCM_BOOL_F, show_func = SCM_BOOL_F;
+ char *doc = NULL, *set_doc = NULL, *show_doc = NULL;
+ SCM initial_value_scm = SCM_BOOL_F;
+ const char * const *enum_list = NULL;
+ SCM p_scm;
+ param_smob *p_smob;
+
+ gdbscm_parse_function_args (FUNC_NAME, SCM_ARG1, keywords, "s#iiOOOsssO",
+ name_scm, &name, rest,
+ &cmd_class_arg_pos, &cmd_class,
+ ¶m_type_arg_pos, ¶m_type,
+ &enum_list_arg_pos, &enum_list_scm,
+ &set_func_arg_pos, &set_func,
+ &show_func_arg_pos, &show_func,
+ &doc_arg_pos, &doc,
+ &set_doc_arg_pos, &set_doc,
+ &show_doc_arg_pos, &show_doc,
+ &initial_value_arg_pos, &initial_value_scm);
+
+ /* If doc is NULL, leave it NULL. See add_setshow_cmd_full. */
+ if (set_doc == NULL)
+ set_doc = get_doc_string ();
+ if (show_doc == NULL)
+ show_doc = get_doc_string ();
+
+ s = name;
+ name = gdbscm_canonicalize_command_name (s, 0);
+ xfree (s);
+ if (doc != NULL)
+ {
+ s = doc;
+ doc = gdbscm_gc_xstrdup (s);
+ xfree (s);
+ }
+ s = set_doc;
+ set_doc = gdbscm_gc_xstrdup (s);
+ xfree (s);
+ s = show_doc;
+ show_doc = gdbscm_gc_xstrdup (s);
+ xfree (s);
+
+ if (!gdbscm_valid_command_class_p (cmd_class))
+ {
+ gdbscm_out_of_range_error (FUNC_NAME, cmd_class_arg_pos,
+ scm_from_int (cmd_class),
+ _("invalid command class argument"));
+ }
+ if (!pascm_valid_parameter_type_p (param_type))
+ {
+ gdbscm_out_of_range_error (FUNC_NAME, param_type_arg_pos,
+ scm_from_int (param_type),
+ _("invalid parameter type argument"));
+ }
+ if (enum_list_arg_pos > 0 && param_type != var_enum)
+ {
+ gdbscm_misc_error (FUNC_NAME, enum_list_arg_pos, enum_list_scm,
+ _("#:enum-values can only be provided with PARAM_ENUM"));
+ }
+ if (enum_list_arg_pos < 0 && param_type == var_enum)
+ {
+ gdbscm_misc_error (FUNC_NAME, GDBSCM_ARG_NONE, SCM_BOOL_F,
+ _("PARAM_ENUM requires an enum-values argument"));
+ }
+ if (set_func_arg_pos > 0)
+ {
+ SCM_ASSERT_TYPE (gdbscm_is_procedure (set_func), set_func,
+ set_func_arg_pos, FUNC_NAME, _("procedure"));
+ }
+ if (show_func_arg_pos > 0)
+ {
+ SCM_ASSERT_TYPE (gdbscm_is_procedure (show_func), show_func,
+ show_func_arg_pos, FUNC_NAME, _("procedure"));
+ }
+ if (param_type == var_enum)
+ {
+ /* Note: enum_list lives in GC space, so we don't have to worry about
+ freeing it if we later throw an exception. */
+ enum_list = compute_enum_list (enum_list_scm, enum_list_arg_pos,
+ FUNC_NAME);
+ }
+
+ /* If initial-value is a function, we need the parameter object constructed
+ to pass it to the function. A typical thing the function may want to do
+ is add an object-property to it to record the last known good value. */
+ p_scm = pascm_make_param_smob ();
+ p_smob = (param_smob *) SCM_SMOB_DATA (p_scm);
+ /* These are all stored in GC space so that we don't have to worry about
+ freeing them if we throw an exception. */
+ p_smob->name = name;
+ p_smob->cmd_class = cmd_class;
+ p_smob->type = (enum var_types) param_type;
+ p_smob->doc = doc;
+ p_smob->set_doc = set_doc;
+ p_smob->show_doc = show_doc;
+ p_smob->enumeration = enum_list;
+ p_smob->set_func = set_func;
+ p_smob->show_func = show_func;
+
+ if (initial_value_arg_pos > 0)
+ {
+ if (gdbscm_is_procedure (initial_value_scm))
+ {
+ initial_value_scm = gdbscm_safe_call_1 (initial_value_scm,
+ p_smob->containing_scm, NULL);
+ if (gdbscm_is_exception (initial_value_scm))
+ gdbscm_throw (initial_value_scm);
+ }
+ pascm_set_param_value_x (param_type, &p_smob->value, enum_list,
+ initial_value_scm,
+ initial_value_arg_pos, FUNC_NAME);
+ }
+
+ return p_scm;
+}
+
+/* (register-parameter! <gdb:parameter>) -> unspecified
+
+ It is an error to register a parameter more than once. */
+
+static SCM
+gdbscm_register_parameter_x (SCM self)
+{
+ param_smob *p_smob
+ = pascm_get_param_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
+ char *cmd_name;
+ struct cmd_list_element **set_list, **show_list;
+ volatile struct gdb_exception except;
+
+ if (pascm_is_valid (p_smob))
+ scm_misc_error (FUNC_NAME, _("parameter is already registered"), SCM_EOL);
+
+ cmd_name = gdbscm_parse_command_name (p_smob->name, FUNC_NAME, SCM_ARG1,
+ &set_list, &setlist);
+ xfree (cmd_name);
+ cmd_name = gdbscm_parse_command_name (p_smob->name, FUNC_NAME, SCM_ARG1,
+ &show_list, &showlist);
+ p_smob->cmd_name = gdbscm_gc_xstrdup (cmd_name);
+ xfree (cmd_name);
+
+ TRY_CATCH (except, RETURN_MASK_ALL)
+ {
+ add_setshow_generic (p_smob->type, p_smob->cmd_class,
+ p_smob->cmd_name, p_smob,
+ p_smob->set_doc, p_smob->show_doc, p_smob->doc,
+ (gdbscm_is_procedure (p_smob->set_func)
+ ? pascm_set_func : NULL),
+ (gdbscm_is_procedure (p_smob->show_func)
+ ? pascm_show_func : NULL),
+ set_list, show_list,
+ &p_smob->set_command, &p_smob->show_command);
+ }
+ GDBSCM_HANDLE_GDB_EXCEPTION (except);
+
+ /* Note: At this point the parameter exists in gdb.
+ So no more errors after this point. */
+
+ /* The owner of this parameter is not in GC-controlled memory, so we need
+ to protect it from GC until the parameter is deleted. */
+ scm_gc_protect_object (p_smob->containing_scm);
+
+ return SCM_UNSPECIFIED;
+}
+
+/* (parameter-value <gdb:parameter>) -> value
+ (parameter-value <string>) -> value */
+
+static SCM
+gdbscm_parameter_value (SCM self)
+{
+ SCM_ASSERT_TYPE (pascm_is_parameter (self) || scm_is_string (self),
+ self, SCM_ARG1, FUNC_NAME, _("<gdb:parameter> or string"));
+
+ if (pascm_is_parameter (self))
+ {
+ param_smob *p_smob = pascm_get_param_smob_arg_unsafe (self, SCM_ARG1,
+ FUNC_NAME);
+
+ return pascm_param_value (p_smob->type, &p_smob->value,
+ SCM_ARG1, FUNC_NAME);
+ }
+ else
+ {
+ char *name;
+ SCM except_scm;
+ struct cmd_list_element *alias, *prefix, *cmd;
+ const char *arg;
+ char *newarg;
+ int found = -1;
+ volatile struct gdb_exception except;
+
+ name = gdbscm_scm_to_host_string (self, NULL, &except_scm);
+ if (name == NULL)
+ gdbscm_throw (except_scm);
+ newarg = concat ("show ", name, (char *) NULL);
+ TRY_CATCH (except, RETURN_MASK_ALL)
+ {
+ found = lookup_cmd_composition (newarg, &alias, &prefix, &cmd);
+ }
+ xfree (name);
+ xfree (newarg);
+ GDBSCM_HANDLE_GDB_EXCEPTION (except);
+ if (!found)
+ {
+ gdbscm_out_of_range_error (FUNC_NAME, SCM_ARG1, self,
+ _("parameter not found"));
+ }
+ if (cmd->var == NULL)
+ {
+ gdbscm_out_of_range_error (FUNC_NAME, SCM_ARG1, self,
+ _("not a parameter"));
+ }
+
+ return pascm_param_value (cmd->var_type, cmd->var, SCM_ARG1, FUNC_NAME);
+ }
+}
+
+/* (set-parameter-value! <gdb:parameter> value) -> unspecified */
+
+static SCM
+gdbscm_set_parameter_value_x (SCM self, SCM value)
+{
+ param_smob *p_smob = pascm_get_param_smob_arg_unsafe (self, SCM_ARG1,
+ FUNC_NAME);
+
+ pascm_set_param_value_x (p_smob->type, &p_smob->value, p_smob->enumeration,
+ value, SCM_ARG2, FUNC_NAME);
+
+ return SCM_UNSPECIFIED;
+}
+\f
+/* Initialize the Scheme parameter support. */
+
+static const scheme_function parameter_functions[] =
+{
+ { "make-parameter", 1, 0, 1, gdbscm_make_parameter,
+ "\
+Make a GDB parameter object.\n\
+\n\
+ Arguments: name\n\
+ [#:command-class <cmd-class>] [#:parameter-type <parameter-type>]\n\
+ [#:enum-list <enum-list>]\n\
+ [#:set-func function] [#:show-func function]\n\
+ [#:doc string] [#:set-doc string] [#:show-doc string]\n\
+ [#:initial-value initial-value]\n\
+ name: The name of the command. It may consist of multiple words,\n\
+ in which case the final word is the name of the new parameter, and\n\
+ earlier words must be prefix commands.\n\
+ cmd-class: The class of the command, one of COMMAND_*.\n\
+ The default is COMMAND_NONE.\n\
+ parameter-type: The kind of parameter, one of PARAM_*\n\
+ The default is PARAM_BOOLEAN.\n\
+ enum-list: If parameter-type is PARAM_ENUM, then this specifies the set\n\
+ of values of the enum.\n\
+ set-func: A function of one parameter: the <gdb:parameter> object.\n\
+ Called *after* the parameter has been set. Returns either \"\" or a\n\
+ non-empty string to be displayed to the user.\n\
+ If non-empty, GDB will add a trailing newline.\n\
+ show-func: A function of two parameters: the <gdb:parameter> object\n\
+ and the string representation of the current value.\n\
+ The result is a string to be displayed to the user.\n\
+ GDB will add a trailing newline.\n\
+ doc: The \"doc string\" of the parameter.\n\
+ set-doc: The \"doc string\" when setting the parameter.\n\
+ show-doc: The \"doc string\" when showing the parameter.\n\
+ initial-value: The initial value of the parameter." },
+
+ { "register-parameter!", 1, 0, 0, gdbscm_register_parameter_x,
+ "\
+Register a <gdb:parameter> object with GDB." },
+
+ { "parameter?", 1, 0, 0, gdbscm_parameter_p,
+ "\
+Return #t if the object is a <gdb:parameter> object." },
+
+ { "parameter-value", 1, 0, 0, gdbscm_parameter_value,
+ "\
+Return the value of a <gdb:parameter> object\n\
+or any gdb parameter if param is a string naming the parameter." },
+
+ { "set-parameter-value!", 2, 0, 0, gdbscm_set_parameter_value_x,
+ "\
+Set the value of a <gdb:parameter> object.\n\
+\n\
+ Arguments: <gdb:parameter> value" },
+
+ END_FUNCTIONS
+};
+
+void
+gdbscm_initialize_parameters (void)
+{
+ parameter_smob_tag
+ = gdbscm_make_smob_type (param_smob_name, sizeof (param_smob));
+ scm_set_smob_print (parameter_smob_tag, pascm_print_param_smob);
+
+ gdbscm_define_integer_constants (parameter_types, 1);
+ gdbscm_define_functions (parameter_functions, 1);
+
+ command_class_keyword = scm_from_latin1_keyword ("command-class");
+ parameter_type_keyword = scm_from_latin1_keyword ("parameter-type");
+ enum_list_keyword = scm_from_latin1_keyword ("enum-list");
+ set_func_keyword = scm_from_latin1_keyword ("set-func");
+ show_func_keyword = scm_from_latin1_keyword ("show-func");
+ doc_keyword = scm_from_latin1_keyword ("doc");
+ set_doc_keyword = scm_from_latin1_keyword ("set-doc");
+ show_doc_keyword = scm_from_latin1_keyword ("show-doc");
+ initial_value_keyword = scm_from_latin1_keyword ("initial-value");
+ auto_keyword = scm_from_latin1_keyword ("auto");
+ unlimited_keyword = scm_from_latin1_keyword ("unlimited");
+}
projects / binutils-gdb.git / commitdiff