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Re: [PATCH v2 30/36] Guile extension language: scm-value.c
- From: Doug Evans <xdje42 at gmail dot com>
- To: gdb-patches at sourceware dot org
- Date: Sun, 09 Feb 2014 21:47:03 -0800
- Subject: Re: [PATCH v2 30/36] Guile extension language: scm-value.c
- Authentication-results: sourceware.org; auth=none
- References: <52dd9b0a dot 0ac5440a dot 3139 dot 01df at mx dot google dot com>
Doug Evans <xdje42@gmail.com> writes:
> This patch adds the interface to target values.
>
> Changes from v1:
> - updated value->string based on feedback
> - add more numeric conversion error tests
>
> 2014-01-20 Doug Evans <xdje42@gmail.com>
>
> * guile/scm-value.c: New file.
>
> testsuite/
> * gdb.guile/scm-value-cc.cc: New file.
> * gdb.guile/scm-value-cc.exp: New file.
> * gdb.guile/scm-value.c: New file.
> * gdb.guile/scm-value.exp: New file.
Here's what I committed.
Subject: [PATCH v3 30/36] Guile extension language: scm-value.c
This patch adds the interface to target values.
Changes from v2:
- add missing get_target_charset function
Changes from v1:
- updated value->string based on feedback
- add more numeric conversion error tests
2014-02-09 Doug Evans <xdje42@gmail.com>
* guile/scm-value.c: New file.
testsuite/
* gdb.guile/scm-value-cc.cc: New file.
* gdb.guile/scm-value-cc.exp: New file.
* gdb.guile/scm-value.c: New file.
* gdb.guile/scm-value.exp: New file.
* lib/gdb.exp (get_target_charset): New function.
diff --git a/gdb/guile/scm-value.c b/gdb/guile/scm-value.c
new file mode 100644
index 0000000..f7f27ce
--- /dev/null
+++ b/gdb/guile/scm-value.c
@@ -0,0 +1,1485 @@
+/* Scheme interface to values.
+
+ 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 "arch-utils.h"
+#include "charset.h"
+#include "cp-abi.h"
+#include "gdb_assert.h"
+#include "infcall.h"
+#include "symtab.h" /* Needed by language.h. */
+#include "language.h"
+#include "valprint.h"
+#include "value.h"
+#include "guile-internal.h"
+
+/* The <gdb:value> smob. */
+
+typedef struct _value_smob
+{
+ /* This always appears first. */
+ gdb_smob base;
+
+ /* Doubly linked list of values in values_in_scheme.
+ IWBN to use a chained_gdb_smob instead, which is doable, it just requires
+ a bit more casting than normal. */
+ struct _value_smob *next;
+ struct _value_smob *prev;
+
+ struct value *value;
+
+ /* These are cached here to avoid making multiple copies of them.
+ Plus computing the dynamic_type can be a bit expensive.
+ We use #f to indicate that the value doesn't exist (e.g. value doesn't
+ have an address), so we need another value to indicate that we haven't
+ computed the value yet. For this we use SCM_UNDEFINED. */
+ SCM address;
+ SCM type;
+ SCM dynamic_type;
+} value_smob;
+
+static const char value_smob_name[] = "gdb:value";
+
+/* The tag Guile knows the value smob by. */
+static scm_t_bits value_smob_tag;
+
+/* List of all values which are currently exposed to Scheme. It is
+ maintained so that when an objfile is discarded, preserve_values
+ can copy the values' types if needed. */
+static value_smob *values_in_scheme;
+
+/* Keywords used by Scheme procedures in this file. */
+static SCM type_keyword;
+static SCM encoding_keyword;
+static SCM errors_keyword;
+static SCM length_keyword;
+
+/* Possible #:errors values. */
+static SCM error_symbol;
+static SCM escape_symbol;
+static SCM substitute_symbol;
+
+/* Administrivia for value smobs. */
+
+/* Iterate over all the <gdb:value> objects, calling preserve_one_value on
+ each.
+ This is the extension_language_ops.preserve_values "method". */
+
+void
+gdbscm_preserve_values (const struct extension_language_defn *extlang,
+ struct objfile *objfile, htab_t copied_types)
+{
+ value_smob *iter;
+
+ for (iter = values_in_scheme; iter; iter = iter->next)
+ preserve_one_value (iter->value, objfile, copied_types);
+}
+
+/* Helper to add a value_smob to the global list. */
+
+static void
+vlscm_remember_scheme_value (value_smob *v_smob)
+{
+ v_smob->next = values_in_scheme;
+ if (v_smob->next)
+ v_smob->next->prev = v_smob;
+ v_smob->prev = NULL;
+ values_in_scheme = v_smob;
+}
+
+/* Helper to remove a value_smob from the global list. */
+
+static void
+vlscm_forget_value_smob (value_smob *v_smob)
+{
+ /* Remove SELF from the global list. */
+ if (v_smob->prev)
+ v_smob->prev->next = v_smob->next;
+ else
+ {
+ gdb_assert (values_in_scheme == v_smob);
+ values_in_scheme = v_smob->next;
+ }
+ if (v_smob->next)
+ v_smob->next->prev = v_smob->prev;
+}
+
+/* The smob "mark" function for <gdb:value>. */
+
+static SCM
+vlscm_mark_value_smob (SCM self)
+{
+ value_smob *v_smob = (value_smob *) SCM_SMOB_DATA (self);
+
+ scm_gc_mark (v_smob->address);
+ scm_gc_mark (v_smob->type);
+ scm_gc_mark (v_smob->dynamic_type);
+ /* Do this last. */
+ return gdbscm_mark_gsmob (&v_smob->base);
+}
+
+/* The smob "free" function for <gdb:value>. */
+
+static size_t
+vlscm_free_value_smob (SCM self)
+{
+ value_smob *v_smob = (value_smob *) SCM_SMOB_DATA (self);
+
+ vlscm_forget_value_smob (v_smob);
+ value_free (v_smob->value);
+
+ return 0;
+}
+
+/* The smob "print" function for <gdb:value>. */
+
+static int
+vlscm_print_value_smob (SCM self, SCM port, scm_print_state *pstate)
+{
+ value_smob *v_smob = (value_smob *) SCM_SMOB_DATA (self);
+ char *s = NULL;
+ struct value_print_options opts;
+ volatile struct gdb_exception except;
+
+ if (pstate->writingp)
+ gdbscm_printf (port, "#<%s ", value_smob_name);
+
+ get_user_print_options (&opts);
+ opts.deref_ref = 0;
+
+ /* pstate->writingp = zero if invoked by display/~A, and nonzero if
+ invoked by write/~S. What to do here may need to evolve.
+ IWBN if we could pass an argument to format that would we could use
+ instead of writingp. */
+ opts.raw = !!pstate->writingp;
+
+ TRY_CATCH (except, RETURN_MASK_ALL)
+ {
+ struct ui_file *stb = mem_fileopen ();
+ struct cleanup *old_chain = make_cleanup_ui_file_delete (stb);
+
+ common_val_print (v_smob->value, stb, 0, &opts, current_language);
+ s = ui_file_xstrdup (stb, NULL);
+
+ do_cleanups (old_chain);
+ }
+ GDBSCM_HANDLE_GDB_EXCEPTION (except);
+
+ if (s != NULL)
+ {
+ scm_puts (s, port);
+ xfree (s);
+ }
+
+ if (pstate->writingp)
+ scm_puts (">", port);
+
+ scm_remember_upto_here_1 (self);
+
+ /* Non-zero means success. */
+ return 1;
+}
+
+/* The smob "equalp" function for <gdb:value>. */
+
+static SCM
+vlscm_equal_p_value_smob (SCM v1, SCM v2)
+{
+ const value_smob *v1_smob = (value_smob *) SCM_SMOB_DATA (v1);
+ const value_smob *v2_smob = (value_smob *) SCM_SMOB_DATA (v2);
+ int result = 0;
+ volatile struct gdb_exception except;
+
+ TRY_CATCH (except, RETURN_MASK_ALL)
+ {
+ result = value_equal (v1_smob->value, v2_smob->value);
+ }
+ GDBSCM_HANDLE_GDB_EXCEPTION (except);
+
+ return scm_from_bool (result);
+}
+
+/* Low level routine to create a <gdb:value> object. */
+
+static SCM
+vlscm_make_value_smob (void)
+{
+ value_smob *v_smob = (value_smob *)
+ scm_gc_malloc (sizeof (value_smob), value_smob_name);
+ SCM v_scm;
+
+ /* These must be filled in by the caller. */
+ v_smob->value = NULL;
+ v_smob->prev = NULL;
+ v_smob->next = NULL;
+
+ /* These are lazily computed. */
+ v_smob->address = SCM_UNDEFINED;
+ v_smob->type = SCM_UNDEFINED;
+ v_smob->dynamic_type = SCM_UNDEFINED;
+
+ v_scm = scm_new_smob (value_smob_tag, (scm_t_bits) v_smob);
+ gdbscm_init_gsmob (&v_smob->base);
+
+ return v_scm;
+}
+
+/* Return non-zero if SCM is a <gdb:value> object. */
+
+int
+vlscm_is_value (SCM scm)
+{
+ return SCM_SMOB_PREDICATE (value_smob_tag, scm);
+}
+
+/* (value? object) -> boolean */
+
+static SCM
+gdbscm_value_p (SCM scm)
+{
+ return scm_from_bool (vlscm_is_value (scm));
+}
+
+/* Create a new <gdb:value> object that encapsulates VALUE.
+ The value is released from the all_values chain so its lifetime is not
+ bound to the execution of a command. */
+
+SCM
+vlscm_scm_from_value (struct value *value)
+{
+ /* N.B. It's important to not cause any side-effects until we know the
+ conversion worked. */
+ SCM v_scm = vlscm_make_value_smob ();
+ value_smob *v_smob = (value_smob *) SCM_SMOB_DATA (v_scm);
+
+ v_smob->value = value;
+ release_value_or_incref (value);
+ vlscm_remember_scheme_value (v_smob);
+
+ return v_scm;
+}
+
+/* Returns the <gdb:value> object in SELF.
+ Throws an exception if SELF is not a <gdb:value> object. */
+
+static SCM
+vlscm_get_value_arg_unsafe (SCM self, int arg_pos, const char *func_name)
+{
+ SCM_ASSERT_TYPE (vlscm_is_value (self), self, arg_pos, func_name,
+ value_smob_name);
+
+ return self;
+}
+
+/* Returns a pointer to the value smob of SELF.
+ Throws an exception if SELF is not a <gdb:value> object. */
+
+static value_smob *
+vlscm_get_value_smob_arg_unsafe (SCM self, int arg_pos, const char *func_name)
+{
+ SCM v_scm = vlscm_get_value_arg_unsafe (self, arg_pos, func_name);
+ value_smob *v_smob = (value_smob *) SCM_SMOB_DATA (v_scm);
+
+ return v_smob;
+}
+
+/* Return the value field of V_SCM, an object of type <gdb:value>.
+ This exists so that we don't have to export the struct's contents. */
+
+struct value *
+vlscm_scm_to_value (SCM v_scm)
+{
+ value_smob *v_smob;
+
+ gdb_assert (vlscm_is_value (v_scm));
+ v_smob = (value_smob *) SCM_SMOB_DATA (v_scm);
+ return v_smob->value;
+}
+
+/* Value methods. */
+
+/* (make-value x [#:type type]) -> <gdb:value> */
+
+static SCM
+gdbscm_make_value (SCM x, SCM rest)
+{
+ struct gdbarch *gdbarch = get_current_arch ();
+ const struct language_defn *language = current_language;
+ const SCM keywords[] = { type_keyword, SCM_BOOL_F };
+ int type_arg_pos = -1;
+ SCM type_scm = SCM_UNDEFINED;
+ SCM except_scm, result;
+ type_smob *t_smob;
+ struct type *type = NULL;
+ struct value *value;
+ struct cleanup *cleanups;
+
+ gdbscm_parse_function_args (FUNC_NAME, SCM_ARG2, keywords, "#O", rest,
+ &type_arg_pos, &type_scm);
+
+ if (type_arg_pos > 0)
+ {
+ t_smob = tyscm_get_type_smob_arg_unsafe (type_scm, type_arg_pos,
+ FUNC_NAME);
+ type = tyscm_type_smob_type (t_smob);
+ }
+
+ cleanups = make_cleanup_value_free_to_mark (value_mark ());
+
+ value = vlscm_convert_typed_value_from_scheme (FUNC_NAME, SCM_ARG1, x,
+ type_arg_pos, type_scm, type,
+ &except_scm,
+ gdbarch, language);
+ if (value == NULL)
+ {
+ do_cleanups (cleanups);
+ gdbscm_throw (except_scm);
+ }
+
+ result = vlscm_scm_from_value (value);
+
+ do_cleanups (cleanups);
+
+ if (gdbscm_is_exception (result))
+ gdbscm_throw (result);
+ return result;
+}
+
+/* (make-lazy-value <gdb:type> address) -> <gdb:value> */
+
+static SCM
+gdbscm_make_lazy_value (SCM type_scm, SCM address_scm)
+{
+ type_smob *t_smob;
+ struct type *type;
+ ULONGEST address;
+ struct value *value = NULL;
+ SCM result;
+ struct cleanup *cleanups;
+ volatile struct gdb_exception except;
+
+ t_smob = tyscm_get_type_smob_arg_unsafe (type_scm, SCM_ARG1, FUNC_NAME);
+ type = tyscm_type_smob_type (t_smob);
+
+ gdbscm_parse_function_args (FUNC_NAME, SCM_ARG2, NULL, "U",
+ address_scm, &address);
+
+ cleanups = make_cleanup_value_free_to_mark (value_mark ());
+
+ /* There's no (current) need to wrap this in a TRY_CATCH, but for consistency
+ and future-proofing we do. */
+ TRY_CATCH (except, RETURN_MASK_ALL)
+ {
+ value = value_from_contents_and_address (type, NULL, address);
+ }
+ GDBSCM_HANDLE_GDB_EXCEPTION_WITH_CLEANUPS (except, cleanups);
+
+ result = vlscm_scm_from_value (value);
+
+ do_cleanups (cleanups);
+
+ if (gdbscm_is_exception (result))
+ gdbscm_throw (result);
+ return result;
+}
+
+/* (value-optimized-out? <gdb:value>) -> boolean */
+
+static SCM
+gdbscm_value_optimized_out_p (SCM self)
+{
+ value_smob *v_smob
+ = vlscm_get_value_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
+ struct value *value = v_smob->value;
+ int opt = 0;
+ volatile struct gdb_exception except;
+
+ TRY_CATCH (except, RETURN_MASK_ALL)
+ {
+ opt = value_optimized_out (value);
+ }
+ GDBSCM_HANDLE_GDB_EXCEPTION (except);
+
+ return scm_from_bool (opt);
+}
+
+/* (value-address <gdb:value>) -> integer
+ Returns #f if the value doesn't have one. */
+
+static SCM
+gdbscm_value_address (SCM self)
+{
+ value_smob *v_smob
+ = vlscm_get_value_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
+ struct value *value = v_smob->value;
+
+ if (SCM_UNBNDP (v_smob->address))
+ {
+ struct value *res_val = NULL;
+ struct cleanup *cleanup
+ = make_cleanup_value_free_to_mark (value_mark ());
+ SCM address;
+ volatile struct gdb_exception except;
+
+ TRY_CATCH (except, RETURN_MASK_ALL)
+ {
+ res_val = value_addr (value);
+ }
+ if (except.reason < 0)
+ address = SCM_BOOL_F;
+ else
+ address = vlscm_scm_from_value (res_val);
+
+ do_cleanups (cleanup);
+
+ if (gdbscm_is_exception (address))
+ gdbscm_throw (address);
+
+ v_smob->address = address;
+ }
+
+ return v_smob->address;
+}
+
+/* (value-dereference <gdb:value>) -> <gdb:value>
+ Given a value of a pointer type, apply the C unary * operator to it. */
+
+static SCM
+gdbscm_value_dereference (SCM self)
+{
+ value_smob *v_smob
+ = vlscm_get_value_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
+ struct value *value = v_smob->value;
+ SCM result;
+ struct value *res_val = NULL;
+ struct cleanup *cleanups;
+ volatile struct gdb_exception except;
+
+ cleanups = make_cleanup_value_free_to_mark (value_mark ());
+
+ TRY_CATCH (except, RETURN_MASK_ALL)
+ {
+ res_val = value_ind (value);
+ }
+ GDBSCM_HANDLE_GDB_EXCEPTION_WITH_CLEANUPS (except, cleanups);
+
+ result = vlscm_scm_from_value (res_val);
+
+ do_cleanups (cleanups);
+
+ if (gdbscm_is_exception (result))
+ gdbscm_throw (result);
+
+ return result;
+}
+
+/* (value-referenced-value <gdb:value>) -> <gdb:value>
+ Given a value of a reference type, return the value referenced.
+ The difference between this function and gdbscm_value_dereference is that
+ the latter applies * unary operator to a value, which need not always
+ result in the value referenced.
+ For example, for a value which is a reference to an 'int' pointer ('int *'),
+ gdbscm_value_dereference will result in a value of type 'int' while
+ gdbscm_value_referenced_value will result in a value of type 'int *'. */
+
+static SCM
+gdbscm_value_referenced_value (SCM self)
+{
+ value_smob *v_smob
+ = vlscm_get_value_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
+ struct value *value = v_smob->value;
+ SCM result;
+ struct value *res_val = NULL;
+ struct cleanup *cleanups;
+ volatile struct gdb_exception except;
+
+ cleanups = make_cleanup_value_free_to_mark (value_mark ());
+
+ TRY_CATCH (except, RETURN_MASK_ALL)
+ {
+ switch (TYPE_CODE (check_typedef (value_type (value))))
+ {
+ case TYPE_CODE_PTR:
+ res_val = value_ind (value);
+ break;
+ case TYPE_CODE_REF:
+ res_val = coerce_ref (value);
+ break;
+ default:
+ error (_("Trying to get the referenced value from a value which is"
+ " neither a pointer nor a reference"));
+ }
+ }
+ GDBSCM_HANDLE_GDB_EXCEPTION_WITH_CLEANUPS (except, cleanups);
+
+ result = vlscm_scm_from_value (res_val);
+
+ do_cleanups (cleanups);
+
+ if (gdbscm_is_exception (result))
+ gdbscm_throw (result);
+
+ return result;
+}
+
+/* (value-type <gdb:value>) -> <gdb:type> */
+
+static SCM
+gdbscm_value_type (SCM self)
+{
+ value_smob *v_smob
+ = vlscm_get_value_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
+ struct value *value = v_smob->value;
+
+ if (SCM_UNBNDP (v_smob->type))
+ v_smob->type = tyscm_scm_from_type (value_type (value));
+
+ return v_smob->type;
+}
+
+/* (value-dynamic-type <gdb:value>) -> <gdb:type> */
+
+static SCM
+gdbscm_value_dynamic_type (SCM self)
+{
+ value_smob *v_smob
+ = vlscm_get_value_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
+ struct value *value = v_smob->value;
+ struct type *type = NULL;
+ volatile struct gdb_exception except;
+
+ if (! SCM_UNBNDP (v_smob->type))
+ return v_smob->dynamic_type;
+
+ TRY_CATCH (except, RETURN_MASK_ALL)
+ {
+ struct cleanup *cleanup
+ = make_cleanup_value_free_to_mark (value_mark ());
+
+ type = value_type (value);
+ CHECK_TYPEDEF (type);
+
+ if (((TYPE_CODE (type) == TYPE_CODE_PTR)
+ || (TYPE_CODE (type) == TYPE_CODE_REF))
+ && (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_CLASS))
+ {
+ struct value *target;
+ int was_pointer = TYPE_CODE (type) == TYPE_CODE_PTR;
+
+ target = value_ind (value);
+ type = value_rtti_type (target, NULL, NULL, NULL);
+
+ if (type)
+ {
+ if (was_pointer)
+ type = lookup_pointer_type (type);
+ else
+ type = lookup_reference_type (type);
+ }
+ }
+ else if (TYPE_CODE (type) == TYPE_CODE_CLASS)
+ type = value_rtti_type (value, NULL, NULL, NULL);
+ else
+ {
+ /* Re-use object's static type. */
+ type = NULL;
+ }
+
+ do_cleanups (cleanup);
+ }
+ GDBSCM_HANDLE_GDB_EXCEPTION (except);
+
+ if (type == NULL)
+ v_smob->dynamic_type = gdbscm_value_type (self);
+ else
+ v_smob->dynamic_type = tyscm_scm_from_type (type);
+
+ return v_smob->dynamic_type;
+}
+
+/* A helper function that implements the various cast operators. */
+
+static SCM
+vlscm_do_cast (SCM self, SCM type_scm, enum exp_opcode op,
+ const char *func_name)
+{
+ value_smob *v_smob
+ = vlscm_get_value_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
+ struct value *value = v_smob->value;
+ type_smob *t_smob
+ = tyscm_get_type_smob_arg_unsafe (type_scm, SCM_ARG2, FUNC_NAME);
+ struct type *type = tyscm_type_smob_type (t_smob);
+ SCM result;
+ struct value *res_val = NULL;
+ struct cleanup *cleanups;
+ volatile struct gdb_exception except;
+
+ cleanups = make_cleanup_value_free_to_mark (value_mark ());
+
+ TRY_CATCH (except, RETURN_MASK_ALL)
+ {
+ if (op == UNOP_DYNAMIC_CAST)
+ res_val = value_dynamic_cast (type, value);
+ else if (op == UNOP_REINTERPRET_CAST)
+ res_val = value_reinterpret_cast (type, value);
+ else
+ {
+ gdb_assert (op == UNOP_CAST);
+ res_val = value_cast (type, value);
+ }
+ }
+ GDBSCM_HANDLE_GDB_EXCEPTION_WITH_CLEANUPS (except, cleanups);
+
+ gdb_assert (res_val != NULL);
+ result = vlscm_scm_from_value (res_val);
+
+ do_cleanups (cleanups);
+
+ if (gdbscm_is_exception (result))
+ gdbscm_throw (result);
+
+ return result;
+}
+
+/* (value-cast <gdb:value> <gdb:type>) -> <gdb:value> */
+
+static SCM
+gdbscm_value_cast (SCM self, SCM new_type)
+{
+ return vlscm_do_cast (self, new_type, UNOP_CAST, FUNC_NAME);
+}
+
+/* (value-dynamic-cast <gdb:value> <gdb:type>) -> <gdb:value> */
+
+static SCM
+gdbscm_value_dynamic_cast (SCM self, SCM new_type)
+{
+ return vlscm_do_cast (self, new_type, UNOP_DYNAMIC_CAST, FUNC_NAME);
+}
+
+/* (value-reinterpret-cast <gdb:value> <gdb:type>) -> <gdb:value> */
+
+static SCM
+gdbscm_value_reinterpret_cast (SCM self, SCM new_type)
+{
+ return vlscm_do_cast (self, new_type, UNOP_REINTERPRET_CAST, FUNC_NAME);
+}
+
+/* (value-field <gdb:value> string) -> <gdb:value>
+ Given string name of an element inside structure, return its <gdb:value>
+ object. */
+
+static SCM
+gdbscm_value_field (SCM self, SCM field_scm)
+{
+ value_smob *v_smob
+ = vlscm_get_value_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
+ struct value *value = v_smob->value;
+ char *field = NULL;
+ struct value *res_val = NULL;
+ SCM result;
+ struct cleanup *cleanups;
+ volatile struct gdb_exception except;
+
+ SCM_ASSERT_TYPE (scm_is_string (field_scm), field_scm, SCM_ARG2, FUNC_NAME,
+ _("string"));
+
+ cleanups = make_cleanup_value_free_to_mark (value_mark ());
+
+ field = gdbscm_scm_to_c_string (field_scm);
+ make_cleanup (xfree, field);
+
+ TRY_CATCH (except, RETURN_MASK_ALL)
+ {
+ struct value *tmp = value;
+
+ res_val = value_struct_elt (&tmp, NULL, field, NULL, NULL);
+ }
+ GDBSCM_HANDLE_GDB_EXCEPTION_WITH_CLEANUPS (except, cleanups);
+
+ gdb_assert (res_val != NULL);
+ result = vlscm_scm_from_value (res_val);
+
+ do_cleanups (cleanups);
+
+ if (gdbscm_is_exception (result))
+ gdbscm_throw (result);
+
+ return result;
+}
+
+/* (value-subscript <gdb:value> integer|<gdb:value>) -> <gdb:value>
+ Return the specified value in an array. */
+
+static SCM
+gdbscm_value_subscript (SCM self, SCM index_scm)
+{
+ value_smob *v_smob
+ = vlscm_get_value_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
+ struct value *value = v_smob->value;
+ struct value *index = NULL;
+ struct value *res_val = NULL;
+ struct type *type = value_type (value);
+ struct gdbarch *gdbarch;
+ SCM result, except_scm;
+ struct cleanup *cleanups;
+ volatile struct gdb_exception except;
+
+ /* The sequencing here, as everywhere else, is important.
+ We can't have existing cleanups when a Scheme exception is thrown. */
+
+ SCM_ASSERT (type != NULL, self, SCM_ARG2, FUNC_NAME);
+ gdbarch = get_type_arch (type);
+
+ cleanups = make_cleanup_value_free_to_mark (value_mark ());
+
+ index = vlscm_convert_value_from_scheme (FUNC_NAME, SCM_ARG2, index_scm,
+ &except_scm,
+ gdbarch, current_language);
+ if (index == NULL)
+ {
+ do_cleanups (cleanups);
+ gdbscm_throw (except_scm);
+ }
+
+ TRY_CATCH (except, RETURN_MASK_ALL)
+ {
+ struct value *tmp = value;
+
+ /* Assume we are attempting an array access, and let the value code
+ throw an exception if the index has an invalid type.
+ Check the value's type is something that can be accessed via
+ a subscript. */
+ tmp = coerce_ref (tmp);
+ type = check_typedef (value_type (tmp));
+ if (TYPE_CODE (type) != TYPE_CODE_ARRAY
+ && TYPE_CODE (type) != TYPE_CODE_PTR)
+ error (_("Cannot subscript requested type"));
+
+ res_val = value_subscript (tmp, value_as_long (index));
+ }
+ GDBSCM_HANDLE_GDB_EXCEPTION_WITH_CLEANUPS (except, cleanups);
+
+ gdb_assert (res_val != NULL);
+ result = vlscm_scm_from_value (res_val);
+
+ do_cleanups (cleanups);
+
+ if (gdbscm_is_exception (result))
+ gdbscm_throw (result);
+
+ return result;
+}
+
+/* (value-call <gdb:value> arg-list) -> <gdb:value>
+ Perform an inferior function call on the value. */
+
+static SCM
+gdbscm_value_call (SCM self, SCM args)
+{
+ value_smob *v_smob
+ = vlscm_get_value_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
+ struct value *function = v_smob->value;
+ struct value *mark = value_mark ();
+ struct type *ftype = NULL;
+ long args_count;
+ struct value **vargs = NULL;
+ SCM result = SCM_BOOL_F;
+ volatile struct gdb_exception except;
+
+ TRY_CATCH (except, RETURN_MASK_ALL)
+ {
+ ftype = check_typedef (value_type (function));
+ }
+ GDBSCM_HANDLE_GDB_EXCEPTION (except);
+
+ SCM_ASSERT_TYPE (TYPE_CODE (ftype) == TYPE_CODE_FUNC, self,
+ SCM_ARG1, FUNC_NAME,
+ _("function (value of TYPE_CODE_FUNC)"));
+
+ SCM_ASSERT_TYPE (gdbscm_is_true (scm_list_p (args)), args,
+ SCM_ARG2, FUNC_NAME, _("list"));
+
+ args_count = scm_ilength (args);
+ if (args_count > 0)
+ {
+ struct gdbarch *gdbarch = get_current_arch ();
+ const struct language_defn *language = current_language;
+ SCM except_scm;
+ long i;
+
+ vargs = alloca (sizeof (struct value *) * args_count);
+ for (i = 0; i < args_count; i++)
+ {
+ SCM arg = scm_car (args);
+
+ vargs[i] = vlscm_convert_value_from_scheme (FUNC_NAME,
+ GDBSCM_ARG_NONE, arg,
+ &except_scm,
+ gdbarch, language);
+ if (vargs[i] == NULL)
+ gdbscm_throw (except_scm);
+
+ args = scm_cdr (args);
+ }
+ gdb_assert (gdbscm_is_true (scm_null_p (args)));
+ }
+
+ TRY_CATCH (except, RETURN_MASK_ALL)
+ {
+ struct cleanup *cleanup = make_cleanup_value_free_to_mark (mark);
+ struct value *return_value;
+
+ return_value = call_function_by_hand (function, args_count, vargs);
+ result = vlscm_scm_from_value (return_value);
+ do_cleanups (cleanup);
+ }
+ GDBSCM_HANDLE_GDB_EXCEPTION (except);
+
+ if (gdbscm_is_exception (result))
+ gdbscm_throw (result);
+
+ return result;
+}
+
+/* (value->bytevector <gdb:value>) -> bytevector */
+
+static SCM
+gdbscm_value_to_bytevector (SCM self)
+{
+ value_smob *v_smob
+ = vlscm_get_value_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
+ struct value *value = v_smob->value;
+ struct type *type;
+ size_t length = 0;
+ const gdb_byte *contents = NULL;
+ SCM bv;
+ volatile struct gdb_exception except;
+
+ type = value_type (value);
+
+ TRY_CATCH (except, RETURN_MASK_ALL)
+ {
+ CHECK_TYPEDEF (type);
+ length = TYPE_LENGTH (type);
+ contents = value_contents (value);
+ }
+ GDBSCM_HANDLE_GDB_EXCEPTION (except);
+
+ bv = scm_c_make_bytevector (length);
+ memcpy (SCM_BYTEVECTOR_CONTENTS (bv), contents, length);
+
+ return bv;
+}
+
+/* Helper function to determine if a type is "int-like". */
+
+static int
+is_intlike (struct type *type, int ptr_ok)
+{
+ return (TYPE_CODE (type) == TYPE_CODE_INT
+ || TYPE_CODE (type) == TYPE_CODE_ENUM
+ || TYPE_CODE (type) == TYPE_CODE_BOOL
+ || TYPE_CODE (type) == TYPE_CODE_CHAR
+ || (ptr_ok && TYPE_CODE (type) == TYPE_CODE_PTR));
+}
+
+/* (value->bool <gdb:value>) -> boolean
+ Throws an error if the value is not integer-like. */
+
+static SCM
+gdbscm_value_to_bool (SCM self)
+{
+ value_smob *v_smob
+ = vlscm_get_value_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
+ struct value *value = v_smob->value;
+ struct type *type;
+ LONGEST l = 0;
+ volatile struct gdb_exception except;
+
+ type = value_type (value);
+
+ TRY_CATCH (except, RETURN_MASK_ALL)
+ {
+ CHECK_TYPEDEF (type);
+ }
+ GDBSCM_HANDLE_GDB_EXCEPTION (except);
+
+ SCM_ASSERT_TYPE (is_intlike (type, 1), self, SCM_ARG1, FUNC_NAME,
+ _("integer-like gdb value"));
+
+ TRY_CATCH (except, RETURN_MASK_ALL)
+ {
+ if (TYPE_CODE (type) == TYPE_CODE_PTR)
+ l = value_as_address (value);
+ else
+ l = value_as_long (value);
+ }
+ GDBSCM_HANDLE_GDB_EXCEPTION (except);
+
+ return scm_from_bool (l != 0);
+}
+
+/* (value->integer <gdb:value>) -> integer
+ Throws an error if the value is not integer-like. */
+
+static SCM
+gdbscm_value_to_integer (SCM self)
+{
+ value_smob *v_smob
+ = vlscm_get_value_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
+ struct value *value = v_smob->value;
+ struct type *type;
+ LONGEST l = 0;
+ volatile struct gdb_exception except;
+
+ type = value_type (value);
+
+ TRY_CATCH (except, RETURN_MASK_ALL)
+ {
+ CHECK_TYPEDEF (type);
+ }
+ GDBSCM_HANDLE_GDB_EXCEPTION (except);
+
+ SCM_ASSERT_TYPE (is_intlike (type, 1), self, SCM_ARG1, FUNC_NAME,
+ _("integer-like gdb value"));
+
+ TRY_CATCH (except, RETURN_MASK_ALL)
+ {
+ if (TYPE_CODE (type) == TYPE_CODE_PTR)
+ l = value_as_address (value);
+ else
+ l = value_as_long (value);
+ }
+ GDBSCM_HANDLE_GDB_EXCEPTION (except);
+
+ if (TYPE_UNSIGNED (type))
+ return gdbscm_scm_from_ulongest (l);
+ else
+ return gdbscm_scm_from_longest (l);
+}
+
+/* (value->real <gdb:value>) -> real
+ Throws an error if the value is not a number. */
+
+static SCM
+gdbscm_value_to_real (SCM self)
+{
+ value_smob *v_smob
+ = vlscm_get_value_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
+ struct value *value = v_smob->value;
+ struct type *type;
+ DOUBLEST d = 0;
+ volatile struct gdb_exception except;
+
+ type = value_type (value);
+
+ TRY_CATCH (except, RETURN_MASK_ALL)
+ {
+ CHECK_TYPEDEF (type);
+ }
+ GDBSCM_HANDLE_GDB_EXCEPTION (except);
+
+ SCM_ASSERT_TYPE (is_intlike (type, 0) || TYPE_CODE (type) == TYPE_CODE_FLT,
+ self, SCM_ARG1, FUNC_NAME, _("number"));
+
+ TRY_CATCH (except, RETURN_MASK_ALL)
+ {
+ d = value_as_double (value);
+ }
+ GDBSCM_HANDLE_GDB_EXCEPTION (except);
+
+ /* TODO: Is there a better way to check if the value fits? */
+ if (d != (double) d)
+ gdbscm_out_of_range_error (FUNC_NAME, SCM_ARG1, self,
+ _("number can't be converted to a double"));
+
+ return scm_from_double (d);
+}
+
+/* (value->string <gdb:value>
+ [#:encoding encoding]
+ [#:errors #f | 'error | 'substitute]
+ [#:length length])
+ -> string
+ Return Unicode string with value's contents, which must be a string.
+
+ If ENCODING is not given, the string is assumed to be encoded in
+ the target's charset.
+
+ ERRORS is one of #f, 'error or 'substitute.
+ An error setting of #f means use the default, which is
+ Guile's %default-port-conversion-strategy. If the default is not one
+ of 'error or 'substitute, 'substitute is used.
+ An error setting of "error" causes an exception to be thrown if there's
+ a decoding error. An error setting of "substitute" causes invalid
+ characters to be replaced with "?".
+
+ If LENGTH is provided, only fetch string to the length provided.
+ LENGTH must be a Scheme integer, it can't be a <gdb:value> integer. */
+
+static SCM
+gdbscm_value_to_string (SCM self, SCM rest)
+{
+ value_smob *v_smob
+ = vlscm_get_value_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
+ struct value *value = v_smob->value;
+ const SCM keywords[] = {
+ encoding_keyword, errors_keyword, length_keyword, SCM_BOOL_F
+ };
+ int encoding_arg_pos = -1, errors_arg_pos = -1, length_arg_pos = -1;
+ char *encoding = NULL;
+ SCM errors = SCM_BOOL_F;
+ int length = -1;
+ gdb_byte *buffer = NULL;
+ const char *la_encoding = NULL;
+ struct type *char_type = NULL;
+ SCM result;
+ struct cleanup *cleanups;
+ volatile struct gdb_exception except;
+
+ /* The sequencing here, as everywhere else, is important.
+ We can't have existing cleanups when a Scheme exception is thrown. */
+
+ gdbscm_parse_function_args (FUNC_NAME, SCM_ARG2, keywords, "#sOi", rest,
+ &encoding_arg_pos, &encoding,
+ &errors_arg_pos, &errors,
+ &length_arg_pos, &length);
+
+ cleanups = make_cleanup (xfree, encoding);
+
+ if (errors_arg_pos > 0
+ && errors != SCM_BOOL_F
+ && !scm_is_eq (errors, error_symbol)
+ && !scm_is_eq (errors, substitute_symbol))
+ {
+ SCM excp
+ = gdbscm_make_out_of_range_error (FUNC_NAME, errors_arg_pos, errors,
+ _("invalid error kind"));
+
+ do_cleanups (cleanups);
+ gdbscm_throw (excp);
+ }
+ if (errors == SCM_BOOL_F)
+ errors = scm_port_conversion_strategy (SCM_BOOL_F);
+ /* We don't assume anything about the result of scm_port_conversion_strategy.
+ From this point on, if errors is not 'errors, use 'substitute. */
+
+ TRY_CATCH (except, RETURN_MASK_ALL)
+ {
+ LA_GET_STRING (value, &buffer, &length, &char_type, &la_encoding);
+ }
+ GDBSCM_HANDLE_GDB_EXCEPTION_WITH_CLEANUPS (except, cleanups);
+
+ /* If errors is "error" scm_from_stringn may throw a Scheme exception.
+ Make sure we don't leak. This is done via scm_dynwind_begin, et.al. */
+ discard_cleanups (cleanups);
+
+ scm_dynwind_begin (0);
+
+ gdbscm_dynwind_xfree (encoding);
+ gdbscm_dynwind_xfree (buffer);
+
+ result = scm_from_stringn ((const char *) buffer,
+ length * TYPE_LENGTH (char_type),
+ (encoding != NULL && *encoding != '\0'
+ ? encoding
+ : la_encoding),
+ scm_is_eq (errors, error_symbol)
+ ? SCM_FAILED_CONVERSION_ERROR
+ : SCM_FAILED_CONVERSION_QUESTION_MARK);
+
+ scm_dynwind_end ();
+
+ return result;
+}
+
+/* (value->lazy-string <gdb:value> [#:encoding encoding] [#:length length])
+ -> <gdb:lazy-string>
+ Return a Scheme object representing a lazy_string_object type.
+ A lazy string is a pointer to a string with an optional encoding and length.
+ If ENCODING is not given, the target's charset is used.
+ If LENGTH is provided then the length parameter is set to LENGTH, otherwise
+ length will be set to -1 (first null of appropriate with).
+ LENGTH must be a Scheme integer, it can't be a <gdb:value> integer. */
+
+static SCM
+gdbscm_value_to_lazy_string (SCM self, SCM rest)
+{
+ value_smob *v_smob
+ = vlscm_get_value_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
+ struct value *value = v_smob->value;
+ const SCM keywords[] = { encoding_keyword, length_keyword, SCM_BOOL_F };
+ int encoding_arg_pos = -1, length_arg_pos = -1;
+ char *encoding = NULL;
+ int length = -1;
+ SCM result = SCM_BOOL_F; /* -Wall */
+ struct cleanup *cleanups;
+ volatile struct gdb_exception except;
+
+ /* The sequencing here, as everywhere else, is important.
+ We can't have existing cleanups when a Scheme exception is thrown. */
+
+ gdbscm_parse_function_args (FUNC_NAME, SCM_ARG2, keywords, "#si", rest,
+ &encoding_arg_pos, &encoding,
+ &length_arg_pos, &length);
+
+ cleanups = make_cleanup (xfree, encoding);
+
+ TRY_CATCH (except, RETURN_MASK_ALL)
+ {
+ struct cleanup *inner_cleanup
+ = make_cleanup_value_free_to_mark (value_mark ());
+
+ if (TYPE_CODE (value_type (value)) == TYPE_CODE_PTR)
+ value = value_ind (value);
+
+ result = lsscm_make_lazy_string (value_address (value), length,
+ encoding, value_type (value));
+
+ do_cleanups (inner_cleanup);
+ }
+ do_cleanups (cleanups);
+ GDBSCM_HANDLE_GDB_EXCEPTION (except);
+
+ if (gdbscm_is_exception (result))
+ gdbscm_throw (result);
+
+ return result;
+}
+
+/* (value-lazy? <gdb:value>) -> boolean */
+
+static SCM
+gdbscm_value_lazy_p (SCM self)
+{
+ value_smob *v_smob
+ = vlscm_get_value_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
+ struct value *value = v_smob->value;
+
+ return scm_from_bool (value_lazy (value));
+}
+
+/* (value-fetch-lazy! <gdb:value>) -> unspecified */
+
+static SCM
+gdbscm_value_fetch_lazy_x (SCM self)
+{
+ value_smob *v_smob
+ = vlscm_get_value_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
+ struct value *value = v_smob->value;
+ volatile struct gdb_exception except;
+
+ TRY_CATCH (except, RETURN_MASK_ALL)
+ {
+ if (value_lazy (value))
+ value_fetch_lazy (value);
+ }
+ GDBSCM_HANDLE_GDB_EXCEPTION (except);
+
+ return SCM_UNSPECIFIED;
+}
+
+/* (value-print <gdb:value>) -> string */
+
+static SCM
+gdbscm_value_print (SCM self)
+{
+ value_smob *v_smob
+ = vlscm_get_value_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
+ struct value *value = v_smob->value;
+ struct value_print_options opts;
+ char *s = NULL;
+ SCM result;
+ volatile struct gdb_exception except;
+
+ get_user_print_options (&opts);
+ opts.deref_ref = 0;
+
+ TRY_CATCH (except, RETURN_MASK_ALL)
+ {
+ struct ui_file *stb = mem_fileopen ();
+ struct cleanup *old_chain = make_cleanup_ui_file_delete (stb);
+
+ common_val_print (value, stb, 0, &opts, current_language);
+ s = ui_file_xstrdup (stb, NULL);
+
+ do_cleanups (old_chain);
+ }
+ GDBSCM_HANDLE_GDB_EXCEPTION (except);
+
+ /* Use SCM_FAILED_CONVERSION_QUESTION_MARK to ensure this doesn't
+ throw an error if the encoding fails.
+ IWBN to use scm_take_locale_string here, but we'd have to temporarily
+ override the default port conversion handler because contrary to
+ documentation it doesn't necessarily free the input string. */
+ result = scm_from_stringn (s, strlen (s), host_charset (),
+ SCM_FAILED_CONVERSION_QUESTION_MARK);
+ xfree (s);
+
+ return result;
+}
+
+/* (parse-and-eval string) -> <gdb:value>
+ Parse a string and evaluate the string as an expression. */
+
+static SCM
+gdbscm_parse_and_eval (SCM expr_scm)
+{
+ char *expr_str;
+ struct value *res_val = NULL;
+ SCM result;
+ struct cleanup *cleanups;
+ volatile struct gdb_exception except;
+
+ /* The sequencing here, as everywhere else, is important.
+ We can't have existing cleanups when a Scheme exception is thrown. */
+
+ gdbscm_parse_function_args (FUNC_NAME, SCM_ARG1, NULL, "s",
+ expr_scm, &expr_str);
+
+ cleanups = make_cleanup_value_free_to_mark (value_mark ());
+ make_cleanup (xfree, expr_str);
+
+ TRY_CATCH (except, RETURN_MASK_ALL)
+ {
+ res_val = parse_and_eval (expr_str);
+ }
+ GDBSCM_HANDLE_GDB_EXCEPTION_WITH_CLEANUPS (except, cleanups);
+
+ gdb_assert (res_val != NULL);
+ result = vlscm_scm_from_value (res_val);
+
+ do_cleanups (cleanups);
+
+ if (gdbscm_is_exception (result))
+ gdbscm_throw (result);
+
+ return result;
+}
+
+/* (history-ref integer) -> <gdb:value>
+ Return the specified value from GDB's value history. */
+
+static SCM
+gdbscm_history_ref (SCM index)
+{
+ int i;
+ struct value *res_val = NULL; /* Initialize to appease gcc warning. */
+ volatile struct gdb_exception except;
+
+ gdbscm_parse_function_args (FUNC_NAME, SCM_ARG1, NULL, "i", index, &i);
+
+ TRY_CATCH (except, RETURN_MASK_ALL)
+ {
+ res_val = access_value_history (i);
+ }
+ GDBSCM_HANDLE_GDB_EXCEPTION (except);
+
+ return vlscm_scm_from_value (res_val);
+}
+
+/* Initialize the Scheme value code. */
+
+static const scheme_function value_functions[] =
+{
+ { "value?", 1, 0, 0, gdbscm_value_p,
+ "\
+Return #t if the object is a <gdb:value> object." },
+
+ { "make-value", 1, 0, 1, gdbscm_make_value,
+ "\
+Create a <gdb:value> representing object.\n\
+Typically this is used to convert numbers and strings to\n\
+<gdb:value> objects.\n\
+\n\
+ Arguments: object [#:type <gdb:type>]" },
+
+ { "value-optimized-out?", 1, 0, 0, gdbscm_value_optimized_out_p,
+ "\
+Return #t if the value has been optimizd out." },
+
+ { "value-address", 1, 0, 0, gdbscm_value_address,
+ "\
+Return the address of the value." },
+
+ { "value-type", 1, 0, 0, gdbscm_value_type,
+ "\
+Return the type of the value." },
+
+ { "value-dynamic-type", 1, 0, 0, gdbscm_value_dynamic_type,
+ "\
+Return the dynamic type of the value." },
+
+ { "value-cast", 2, 0, 0, gdbscm_value_cast,
+ "\
+Cast the value to the supplied type.\n\
+\n\
+ Arguments: <gdb:value> <gdb:type>" },
+
+ { "value-dynamic-cast", 2, 0, 0, gdbscm_value_dynamic_cast,
+ "\
+Cast the value to the supplied type, as if by the C++\n\
+dynamic_cast operator.\n\
+\n\
+ Arguments: <gdb:value> <gdb:type>" },
+
+ { "value-reinterpret-cast", 2, 0, 0, gdbscm_value_reinterpret_cast,
+ "\
+Cast the value to the supplied type, as if by the C++\n\
+reinterpret_cast operator.\n\
+\n\
+ Arguments: <gdb:value> <gdb:type>" },
+
+ { "value-dereference", 1, 0, 0, gdbscm_value_dereference,
+ "\
+Return the result of applying the C unary * operator to the value." },
+
+ { "value-referenced-value", 1, 0, 0, gdbscm_value_referenced_value,
+ "\
+Given a value of a reference type, return the value referenced.\n\
+The difference between this function and value-dereference is that\n\
+the latter applies * unary operator to a value, which need not always\n\
+result in the value referenced.\n\
+For example, for a value which is a reference to an 'int' pointer ('int *'),\n\
+value-dereference will result in a value of type 'int' while\n\
+value-referenced-value will result in a value of type 'int *'." },
+
+ { "value-field", 2, 0, 0, gdbscm_value_field,
+ "\
+Return the specified field of the value.\n\
+\n\
+ Arguments: <gdb:value> string" },
+
+ { "value-subscript", 2, 0, 0, gdbscm_value_subscript,
+ "\
+Return the value of the array at the specified index.\n\
+\n\
+ Arguments: <gdb:value> integer" },
+
+ { "value-call", 2, 0, 0, gdbscm_value_call,
+ "\
+Perform an inferior function call taking the value as a pointer to the\n\
+function to call.\n\
+Each element of the argument list must be a <gdb:value> object or an object\n\
+that can be converted to one.\n\
+The result is the value returned by the function.\n\
+\n\
+ Arguments: <gdb:value> arg-list" },
+
+ { "value->bool", 1, 0, 0, gdbscm_value_to_bool,
+ "\
+Return the Scheme boolean representing the GDB value.\n\
+The value must be \"integer like\". Pointers are ok." },
+
+ { "value->integer", 1, 0, 0, gdbscm_value_to_integer,
+ "\
+Return the Scheme integer representing the GDB value.\n\
+The value must be \"integer like\". Pointers are ok." },
+
+ { "value->real", 1, 0, 0, gdbscm_value_to_real,
+ "\
+Return the Scheme real number representing the GDB value.\n\
+The value must be a number." },
+
+ { "value->bytevector", 1, 0, 0, gdbscm_value_to_bytevector,
+ "\
+Return a Scheme bytevector with the raw contents of the GDB value.\n\
+No transformation, endian or otherwise, is performed." },
+
+ { "value->string", 1, 0, 1, gdbscm_value_to_string,
+ "\
+Return the Unicode string of the value's contents.\n\
+If ENCODING is not given, the string is assumed to be encoded in\n\
+the target's charset.\n\
+An error setting \"error\" causes an exception to be thrown if there's\n\
+a decoding error. An error setting of \"substitute\" causes invalid\n\
+characters to be replaced with \"?\". The default is \"error\".\n\
+If LENGTH is provided, only fetch string to the length provided.\n\
+\n\
+ Arguments: <gdb:value>\n\
+ [#:encoding encoding] [#:errors \"error\"|\"substitute\"]\n\
+ [#:length length]" },
+
+ { "value->lazy-string", 1, 0, 1, gdbscm_value_to_lazy_string,
+ "\
+Return a Scheme object representing a lazily fetched Unicode string\n\
+of the value's contents.\n\
+If ENCODING is not given, the string is assumed to be encoded in\n\
+the target's charset.\n\
+If LENGTH is provided, only fetch string to the length provided.\n\
+\n\
+ Arguments: <gdb:value> [#:encoding encoding] [#:length length]" },
+
+ { "value-lazy?", 1, 0, 0, gdbscm_value_lazy_p,
+ "\
+Return #t if the value is lazy (not fetched yet from the inferior).\n\
+A lazy value is fetched when needed, or when the value-fetch-lazy! function\n\
+is called." },
+
+ { "make-lazy-value", 2, 0, 0, gdbscm_make_lazy_value,
+ "\
+Create a <gdb:value> that will be lazily fetched from the target.\n\
+\n\
+ Arguments: <gdb:type> address" },
+
+ { "value-fetch-lazy!", 1, 0, 0, gdbscm_value_fetch_lazy_x,
+ "\
+Fetch the value from the inferior, if it was lazy.\n\
+The result is \"unspecified\"." },
+
+ { "value-print", 1, 0, 0, gdbscm_value_print,
+ "\
+Return the string representation (print form) of the value." },
+
+ { "parse-and-eval", 1, 0, 0, gdbscm_parse_and_eval,
+ "\
+Evaluates string in gdb and returns the result as a <gdb:value> object." },
+
+ { "history-ref", 1, 0, 0, gdbscm_history_ref,
+ "\
+Return the specified value from GDB's value history." },
+
+ END_FUNCTIONS
+};
+
+void
+gdbscm_initialize_values (void)
+{
+ value_smob_tag = gdbscm_make_smob_type (value_smob_name,
+ sizeof (value_smob));
+ scm_set_smob_mark (value_smob_tag, vlscm_mark_value_smob);
+ scm_set_smob_free (value_smob_tag, vlscm_free_value_smob);
+ scm_set_smob_print (value_smob_tag, vlscm_print_value_smob);
+ scm_set_smob_equalp (value_smob_tag, vlscm_equal_p_value_smob);
+
+ gdbscm_define_functions (value_functions, 1);
+
+ type_keyword = scm_from_latin1_keyword ("type");
+ encoding_keyword = scm_from_latin1_keyword ("encoding");
+ errors_keyword = scm_from_latin1_keyword ("errors");
+ length_keyword = scm_from_latin1_keyword ("length");
+
+ error_symbol = scm_from_latin1_symbol ("error");
+ escape_symbol = scm_from_latin1_symbol ("escape");
+ substitute_symbol = scm_from_latin1_symbol ("substitute");
+}
diff --git a/gdb/testsuite/gdb.guile/scm-value-cc.cc b/gdb/testsuite/gdb.guile/scm-value-cc.cc
new file mode 100644
index 0000000..df19f0b
--- /dev/null
+++ b/gdb/testsuite/gdb.guile/scm-value-cc.cc
@@ -0,0 +1,39 @@
+/* This testcase is part of GDB, the GNU debugger.
+
+ Copyright 2012-2014 Free Software Foundation, Inc.
+
+ 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/>. */
+
+class A {
+};
+
+typedef int *int_ptr;
+
+int
+func (const A &a)
+{
+ int val = 10;
+ int &int_ref = val;
+ int_ptr ptr = &val;
+ int_ptr &int_ptr_ref = ptr;
+
+ return 0; /* Break here. */
+}
+
+int
+main ()
+{
+ A obj;
+ return func (obj);
+}
diff --git a/gdb/testsuite/gdb.guile/scm-value-cc.exp b/gdb/testsuite/gdb.guile/scm-value-cc.exp
new file mode 100644
index 0000000..685deb1
--- /dev/null
+++ b/gdb/testsuite/gdb.guile/scm-value-cc.exp
@@ -0,0 +1,57 @@
+# Copyright (C) 2012-2014 Free Software Foundation, Inc.
+
+# 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/>.
+
+# This file is part of the GDB testsuite.
+# It tests the mechanism exposing c++ values to Guile.
+
+load_lib gdb-guile.exp
+
+if { [skip_cplus_tests] } { continue }
+
+standard_testfile .cc
+
+if {[prepare_for_testing $testfile.exp $testfile $srcfile {debug c++}]} {
+ return
+}
+
+# Skip all tests if Guile scripting is not enabled.
+if { [skip_guile_tests] } { continue }
+
+if ![gdb_guile_runto_main] {
+ return
+}
+
+gdb_breakpoint [gdb_get_line_number "Break here."]
+gdb_continue_to_breakpoint "Break here" ".*Break here.*"
+
+gdb_test "gu (print (value-type (parse-and-eval \"a\")))" \
+ "= const A &"
+gdb_test "gu (print (value-type (value-referenced-value (parse-and-eval \"a\"))))" \
+ "= const A"
+gdb_test "gu (print (value-type (parse-and-eval \"int_ref\")))" \
+ "= int &"
+gdb_test "gu (print (value-type (value-referenced-value (parse-and-eval \"int_ref\"))))" \
+ "= int"
+gdb_test "gu (print (value-referenced-value (parse-and-eval \"int_ref\")))" \
+ "= 10"
+
+gdb_test "gu (print (value-type (value-dereference (parse-and-eval \"int_ptr_ref\"))))" \
+ "= int"
+gdb_test "gu (print (value-type (value-referenced-value (parse-and-eval \"int_ptr_ref\"))))" \
+ "= int_ptr"
+gdb_test "gu (print (value-dereference (value-referenced-value (parse-and-eval \"int_ptr_ref\"))))" \
+ "= 10"
+gdb_test "gu (print (value-referenced-value (value-referenced-value (parse-and-eval \"int_ptr_ref\"))))" \
+ "= 10"
diff --git a/gdb/testsuite/gdb.guile/scm-value.c b/gdb/testsuite/gdb.guile/scm-value.c
new file mode 100644
index 0000000..3c61911
--- /dev/null
+++ b/gdb/testsuite/gdb.guile/scm-value.c
@@ -0,0 +1,101 @@
+/* This testcase is part of GDB, the GNU debugger.
+
+ Copyright 2008-2014 Free Software Foundation, Inc.
+
+ 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 <stdio.h>
+
+struct s
+{
+ int a;
+ int b;
+};
+
+union u
+{
+ int a;
+ float b;
+};
+
+enum e
+ {
+ ONE = 1,
+ TWO = 2
+ };
+
+typedef struct s *PTR;
+
+enum e evalue = TWO;
+
+#ifdef __cplusplus
+
+struct Base {
+ virtual int x() { return 5; }
+};
+
+struct Derived : public Base {
+};
+
+Base *base = new Derived ();
+
+void ptr_ref(int*& rptr_int)
+{
+ return; /* break to inspect pointer by reference. */
+}
+#endif
+
+void func1 ()
+{
+ printf ("void function called\n");
+}
+
+int func2 (int arg1, int arg2)
+{
+ return arg1 + arg2;
+}
+
+char **save_argv;
+
+int
+main (int argc, char *argv[])
+{
+ char *cp = argv[0]; /* Prevent gcc from optimizing argv[] out. */
+ struct s s;
+ union u u;
+ PTR x = &s;
+ char st[17] = "divide et impera";
+ char nullst[17] = "divide\0et\0impera";
+ void (*fp1) (void) = &func1;
+ int (*fp2) (int, int) = &func2;
+ const char *sptr = "pointer";
+ const char *embed = "embedded x\201\202\203\204";
+ int a[3] = {1,2,3};
+ int *p = a;
+ int i = 2;
+ int *ptr_i = &i;
+ const char *sn = 0;
+ s.a = 3;
+ s.b = 5;
+ u.a = 7;
+ (*fp1) ();
+ (*fp2) (10,20);
+
+#ifdef __cplusplus
+ ptr_ref(ptr_i);
+#endif
+
+ save_argv = argv; /* break to inspect struct and union */
+ return 0;
+}
diff --git a/gdb/testsuite/gdb.guile/scm-value.exp b/gdb/testsuite/gdb.guile/scm-value.exp
new file mode 100644
index 0000000..3ebdd58
--- /dev/null
+++ b/gdb/testsuite/gdb.guile/scm-value.exp
@@ -0,0 +1,449 @@
+# Copyright (C) 2008-2014 Free Software Foundation, Inc.
+
+# 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/>.
+
+# This file is part of the GDB testsuite.
+# It tests the mechanism exposing values to Guile.
+
+load_lib gdb-guile.exp
+
+standard_testfile
+
+# Build inferior to language specification.
+# LANG is one of "c" or "c++".
+proc build_inferior {exefile lang} {
+ global srcdir subdir srcfile testfile hex
+
+ # Use different names for .o files based on the language.
+ # For Fission, the debug info goes in foo.dwo and we don't want,
+ # for example, a C++ compile to clobber the dwo of a C compile.
+ # ref: http://gcc.gnu.org/wiki/DebugFission
+ switch ${lang} {
+ "c" { set filename ${testfile}.o }
+ "c++" { set filename ${testfile}-cxx.o }
+ }
+ set objfile [standard_output_file $filename]
+
+ if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${objfile}" object "debug $lang"] != ""
+ || [gdb_compile "${objfile}" "${exefile}" executable "debug $lang"] != "" } {
+ untested "Couldn't compile ${srcfile} in $lang mode"
+ return -1
+ }
+ return 0
+}
+
+proc test_value_in_inferior {} {
+ global gdb_prompt
+ global testfile
+
+ gdb_breakpoint [gdb_get_line_number "break to inspect struct and union"]
+
+ gdb_continue_to_breakpoint "break to inspect struct and union"
+
+ # Just get inferior variable s in the value history, available to guile.
+ gdb_test "print s" "= {a = 3, b = 5}" ""
+
+ gdb_scm_test_silent_cmd "gu (define s (history-ref 0))" "set s"
+
+ gdb_test "gu (print (value-field s \"a\"))" \
+ "= 3" "access element inside struct using string name"
+
+ # Test dereferencing the argv pointer.
+
+ # Just get inferior variable argv the value history, available to guile.
+ gdb_test "print argv" "= \\(char \\*\\*\\) 0x.*" ""
+
+ gdb_scm_test_silent_cmd "gu (define argv (history-ref 0))" \
+ "set argv"
+ gdb_scm_test_silent_cmd "gu (define arg0 (value-dereference argv))" \
+ "set arg0"
+
+ # Check that the dereferenced value is sane.
+ if { ! [target_info exists noargs] } {
+ gdb_test "gu (print arg0)" \
+ "0x.*$testfile\"" "verify dereferenced value"
+ }
+
+ # Smoke-test value-optimized-out?.
+ gdb_test "gu (print (value-optimized-out? arg0))" \
+ "= #f" "Test value-optimized-out?"
+
+ # Test address attribute.
+ gdb_test "gu (print (value-address arg0))" \
+ "= 0x\[\[:xdigit:\]\]+" "Test address attribute"
+ # Test address attribute is #f in a non-addressable value.
+ gdb_test "gu (print (value-address (make-value 42)))" \
+ "= #f" "Test address attribute in non-addressable value"
+
+ # Test displaying a variable that is temporarily at a bad address.
+ # But if we can examine what's at memory address 0, then we'll also be
+ # able to display it without error. Don't run the test in that case.
+ set can_read_0 0
+ gdb_test_multiple "x 0" "memory at address 0" {
+ -re "0x0:\[ \t\]*Cannot access memory at address 0x0\r\n$gdb_prompt $" { }
+ -re "0x0:\[ \t\]*Error accessing memory address 0x0\r\n$gdb_prompt $" { }
+ -re "\r\n$gdb_prompt $" {
+ set can_read_0 1
+ }
+ }
+
+ # Test memory error.
+ set test "parse_and_eval with memory error"
+ if {$can_read_0} {
+ untested $test
+ } else {
+ gdb_test "gu (print (parse-and-eval \"*(int*)0\"))" \
+ "ERROR: Cannot access memory at address 0x0.*" $test
+ }
+
+ # Test Guile lazy value handling
+ set test "memory error and lazy values"
+ if {$can_read_0} {
+ untested $test
+ } else {
+ gdb_test_no_output "gu (define inval (parse-and-eval \"*(int*)0\"))"
+ gdb_test "gu (print (value-lazy? inval))" \
+ "#t"
+ gdb_test "gu (define inval2 (value-add inval 1))" \
+ "ERROR: Cannot access memory at address 0x0.*" $test
+ gdb_test "gu (value-fetch-lazy! inval))" \
+ "ERROR: Cannot access memory at address 0x0.*" $test
+ }
+ gdb_test_no_output "gu (define argc-lazy (parse-and-eval \"argc\"))"
+ gdb_test_no_output "gu (define argc-notlazy (parse-and-eval \"argc\"))"
+ gdb_test_no_output "gu (value-fetch-lazy! argc-notlazy)"
+ gdb_test "gu (print (value-lazy? argc-lazy))" "= #t"
+ gdb_test "gu (print (value-lazy? argc-notlazy))" "= #f"
+ gdb_test "print argc" "= 1" "sanity check argc"
+ gdb_test "gu (print (value-lazy? argc-lazy))" "= #t"
+ gdb_test_no_output "set argc=2"
+ gdb_test "gu (print argc-notlazy)" "= 1"
+ gdb_test "gu (print argc-lazy)" "= 2"
+ gdb_test "gu (print (value-lazy? argc-lazy))" "= #f"
+
+ # Test string fetches, both partial and whole.
+ gdb_test "print st" "\"divide et impera\""
+ gdb_scm_test_silent_cmd "gu (define st (history-ref 0))" \
+ "inf: get st value from history"
+ gdb_test "gu (print (value->string st))" \
+ "= divide et impera" "Test string with no length"
+ gdb_test "gu (print (value->string st #:length -1))" \
+ "= divide et impera" "Test string (length = -1) is all of the string"
+ gdb_test "gu (print (value->string st #:length 6))" \
+ "= divide"
+ gdb_test "gu (print (string-append \"---\" (value->string st #:length 0) \"---\"))" \
+ "= ------" "Test string (length = 0) is empty"
+ gdb_test "gu (print (string-length (value->string st #:length 0)))" \
+ "= 0" "Test length is 0"
+
+ # Fetch a string that has embedded nulls.
+ gdb_test "print nullst" "\"divide\\\\000et\\\\000impera\".*"
+ gdb_scm_test_silent_cmd "gu (define nullst (history-ref 0))" \
+ "inf: get nullst value from history"
+ gdb_test "gu (print (value->string nullst))" \
+ "divide" "Test string to first null"
+ gdb_scm_test_silent_cmd "gu (set! nullst (value->string nullst #:length 9))" \
+ "get string beyond null"
+ gdb_test "gu (print nullst)" \
+ "= divide\\\\000et"
+}
+
+proc test_strings {} {
+ gdb_test "gu (make-value \"test\")" "#<gdb:value \"test\">" "make string"
+
+ # Test string conversion errors.
+ set save_charset [get_target_charset]
+ gdb_test_no_output "set target-charset UTF-8"
+
+ gdb_test_no_output "gu (set-port-conversion-strategy! #f 'error)"
+ gdb_test "gu (print (value->string (make-value (string #\\x1234)) #:encoding \"ASCII\"))" \
+ "ERROR.*decoding-error.*" \
+ "value->string with default #:errors = 'error"
+
+ # There is no 'escape strategy for C->SCM string conversions, but it's
+ # still a legitimate value for %default-port-conversion-strategy.
+ # GDB handles this by, umm, substituting 'substitute.
+ # Use this case to also handle "#:errors #f" which explicitly says
+ # "use %default-port-conversion-strategy".
+ gdb_test_no_output "gu (set-port-conversion-strategy! #f 'escape)"
+ gdb_test "gu (print (value->string (make-value (string #\\x1234)) #:encoding \"ASCII\" #:errors #f))" \
+ "= \[?\]{3}" "value->string with default #:errors = 'escape"
+
+ # This is last in the default conversion tests so that
+ # %default-port-conversion-strategy ends up with the default value.
+ gdb_test_no_output "gu (set-port-conversion-strategy! #f 'substitute)"
+ gdb_test "gu (print (value->string (make-value (string #\\x1234)) #:encoding \"ASCII\"))" \
+ "= \[?\]{3}" "value->string with default #:errors = 'substitute"
+
+ gdb_test "gu (print (value->string (make-value (string #\\x1234)) #:encoding \"ASCII\" #:errors 'error))" \
+ "ERROR.*decoding-error.*" "value->string #:errors 'error"
+ gdb_test "gu (print (value->string (make-value (string #\\x1234)) #:encoding \"ASCII\" #:errors 'substitute))" \
+ "= \[?\]{3}" "value->string #:errors 'substitute"
+ gdb_test "gu (print (value->string (make-value \"abc\") #:errors \"foo\"))" \
+ "ERROR.*invalid error kind.*" "bad value for #:errors"
+
+ gdb_test_no_output "set target-charset $save_charset" \
+ "restore target-charset"
+}
+
+proc test_lazy_strings {} {
+ global hex
+
+ gdb_test "print sptr" "\"pointer\""
+ gdb_scm_test_silent_cmd "gu (define sptr (history-ref 0))" \
+ "lazy strings: get sptr value from history"
+
+ gdb_scm_test_silent_cmd "gu (define lstr (value->lazy-string sptr))" \
+ "Aquire lazy string"
+ gdb_test "gu (print (lazy-string-type lstr))" \
+ "= const char \*." "Test lazy-string type name equality"
+ gdb_test "gu (print (value-type sptr))" \
+ "= const char \*." "Test string type name equality"
+ gdb_test "print sn" "0x0"
+ gdb_scm_test_silent_cmd "gu (define snptr (history-ref 0))" \
+ "lazy strings: get snptr value from history"
+ gdb_test "gu (define snstr (value->lazy-string snptr #:length 5))" \
+ ".*cannot create a lazy string with address.*" "Test lazy string"
+ gdb_scm_test_silent_cmd "gu (define snstr (value->lazy-string snptr #:length 0))" \
+ "Successfully create a lazy string"
+ gdb_test "gu (print (lazy-string-length snstr))" \
+ "= 0" "Test lazy string length"
+ gdb_test "gu (print (lazy-string-address snstr))" \
+ "= 0" "Test lazy string address"
+}
+
+proc test_inferior_function_call {} {
+ global gdb_prompt hex decimal
+
+ # Correct inferior call without arguments.
+ gdb_test "p/x fp1" "= $hex.*"
+ gdb_scm_test_silent_cmd "gu (define fp1 (history-ref 0))" \
+ "get fp1 value from history"
+ gdb_scm_test_silent_cmd "gu (set! fp1 (value-dereference fp1))" \
+ "dereference fp1"
+ gdb_test "gu (print (value-call fp1 '()))" \
+ "= void"
+
+ # Correct inferior call with arguments.
+ gdb_test "p/x fp2" "= $hex.*"
+ gdb_scm_test_silent_cmd "gu (define fp2 (history-ref 0))" \
+ "get fp2 value from history"
+ gdb_scm_test_silent_cmd "gu (set! fp2 (value-dereference fp2))" \
+ "dereference fp2"
+ gdb_test "gu (print (value-call fp2 (list 10 20)))" \
+ "= 30"
+
+ # Incorrect to call an int value.
+ gdb_test "p i" "= $decimal.*"
+ gdb_scm_test_silent_cmd "gu (define i (history-ref 0))" \
+ "inf call: get i value from history"
+ gdb_test "gu (print (value-call i '()))" \
+ "ERROR: .*: Wrong type argument in position 1 \\(expecting function \\(value of TYPE_CODE_FUNC\\)\\): .*"
+
+ # Incorrect number of arguments.
+ gdb_test "p/x fp2" "= $hex.*"
+ gdb_scm_test_silent_cmd "gu (define fp3 (history-ref 0))" \
+ "get fp3 value from history"
+ gdb_scm_test_silent_cmd "gu (set! fp3 (value-dereference fp3))" \
+ "dereference fp3"
+ gdb_test "gu (print (value-call fp3 (list 10)))" \
+ "ERROR: Too few arguments in function call.*"
+}
+
+proc test_value_after_death {} {
+ # Construct a type while the inferior is still running.
+ gdb_scm_test_silent_cmd "gu (define ptrtype (lookup-type \"PTR\"))" \
+ "create PTR type"
+
+ # Kill the inferior and remove the symbols.
+ gdb_test "kill" "" "kill the inferior" \
+ "Kill the program being debugged. .y or n. $" \
+ "y"
+ gdb_test "file" "" "Discard the symbols" \
+ "Discard symbol table from.*y or n. $" \
+ "y"
+
+ # Now create a value using that type. Relies on arg0, created by
+ # test_value_in_inferior.
+ gdb_scm_test_silent_cmd "gu (define castval (value-cast arg0 (type-pointer ptrtype)))" \
+ "cast arg0 to PTR"
+
+ # Make sure the type is deleted.
+ gdb_scm_test_silent_cmd "gu (set! ptrtype #f)" \
+ "delete PTR type"
+
+ # Now see if the value's type is still valid.
+ gdb_test "gu (print (value-type castval))" \
+ "= PTR ." "print value's type"
+}
+
+# Regression test for invalid subscript operations. The bug was that
+# the type of the value was not being checked before allowing a
+# subscript operation to proceed.
+
+proc test_subscript_regression {exefile lang} {
+ # Start with a fresh gdb.
+ clean_restart ${exefile}
+
+ if ![gdb_guile_runto_main ] {
+ fail "Can't run to main"
+ return
+ }
+
+ if {$lang == "c++"} {
+ gdb_breakpoint [gdb_get_line_number "break to inspect pointer by reference"]
+ gdb_continue_to_breakpoint "break to inspect pointer by reference"
+
+ gdb_scm_test_silent_cmd "print rptr_int" \
+ "Obtain address"
+ gdb_scm_test_silent_cmd "gu (define rptr (history-ref 0))" \
+ "set rptr"
+ gdb_test "gu (print (value-subscript rptr 0))" \
+ "= 2" "Check pointer passed as reference"
+
+ # Just the most basic test of dynamic_cast -- it is checked in
+ # the C++ tests.
+ gdb_test "gu (print (value->bool (value-dynamic-cast (parse-and-eval \"base\") (type-pointer (lookup-type \"Derived\")))))" \
+ "= #t"
+
+ # Likewise.
+ gdb_test "gu (print (value-dynamic-type (parse-and-eval \"base\")))" \
+ "= Derived \[*\]"
+ # A static type case.
+ gdb_test "gu (print (value-dynamic-type (parse-and-eval \"5\")))" \
+ "= int"
+ }
+
+ gdb_breakpoint [gdb_get_line_number "break to inspect struct and union"]
+ gdb_continue_to_breakpoint "break to inspect struct and union"
+
+ gdb_scm_test_silent_cmd "gu (define intv (make-value 1))" \
+ "Create int value for subscript test"
+ gdb_scm_test_silent_cmd "gu (define stringv (make-value \"foo\"))" \
+ "Create string value for subscript test"
+
+ # Try to access an int with a subscript. This should fail.
+ gdb_test "gu (print intv)" \
+ "= 1" "Baseline print of an int Guile value"
+ gdb_test "gu (print (value-subscript intv 0))" \
+ "ERROR: Cannot subscript requested type.*" \
+ "Attempt to access an integer with a subscript"
+
+ # Try to access a string with a subscript. This should pass.
+ gdb_test "gu (print stringv)" \
+ "= \"foo\"" "Baseline print of a string Guile value"
+ gdb_test "gu (print (value-subscript stringv 0))" \
+ "= 102 'f'" "Attempt to access a string with a subscript"
+
+ # Try to access an int array via a pointer with a subscript.
+ # This should pass.
+ gdb_scm_test_silent_cmd "print p" "Build pointer to array"
+ gdb_scm_test_silent_cmd "gu (define pointer (history-ref 0))" "set pointer"
+ gdb_test "gu (print (value-subscript pointer 0))" \
+ "= 1" "Access array via pointer with int subscript"
+ gdb_test "gu (print (value-subscript pointer intv))" \
+ "= 2" "Access array via pointer with value subscript"
+
+ # Try to access a single dimension array with a subscript to the
+ # result. This should fail.
+ gdb_test "gu (print (value-subscript (value-subscript pointer intv) 0))" \
+ "ERROR: Cannot subscript requested type.*" \
+ "Attempt to access an integer with a subscript 2"
+
+ # Lastly, test subscript access to an array with multiple
+ # dimensions. This should pass.
+ gdb_scm_test_silent_cmd "print {\"fu \",\"foo\",\"bar\"}" "Build array"
+ gdb_scm_test_silent_cmd "gu (define marray (history-ref 0))" ""
+ gdb_test "gu (print (value-subscript (value-subscript marray 1) 2))" \
+ "o." "Test multiple subscript"
+}
+
+# A few tests of gdb:parse-and-eval.
+
+proc test_parse_and_eval {} {
+ gdb_test "gu (print (parse-and-eval \"23\"))" \
+ "= 23" "parse-and-eval constant test"
+ gdb_test "gu (print (parse-and-eval \"5 + 7\"))" \
+ "= 12" "parse-and-eval simple expression test"
+ gdb_test "gu (raw-print (parse-and-eval \"5 + 7\"))" \
+ "#<gdb:value 12>" "parse-and-eval type test"
+}
+
+# Test that values are hashable.
+# N.B.: While smobs are hashable, the hash is really non-existent,
+# they all get hashed to the same value. Guile may provide a hash function
+# for smobs in a future release. In the meantime one should use a custom
+# hash table that uses gdb:hash-gsmob.
+
+proc test_value_hash {} {
+ gdb_test_multiline "Simple Guile value dictionary" \
+ "guile" "" \
+ "(define one (make-value 1))" "" \
+ "(define two (make-value 2))" "" \
+ "(define three (make-value 3))" "" \
+ "(define vdict (make-hash-table 5))" "" \
+ "(hash-set! vdict one \"one str\")" "" \
+ "(hash-set! vdict two \"two str\")" "" \
+ "(hash-set! vdict three \"three str\")" "" \
+ "end"
+ gdb_test "gu (print (hash-ref vdict one))" \
+ "one str" "Test dictionary hash 1"
+ gdb_test "gu (print (hash-ref vdict two))" \
+ "two str" "Test dictionary hash 2"
+ gdb_test "gu (print (hash-ref vdict three))" \
+ "three str" "Test dictionary hash 3"
+}
+
+# Build C version of executable. C++ is built later.
+if { [build_inferior "${binfile}" "c"] < 0 } {
+ return
+}
+
+# Start with a fresh gdb.
+clean_restart ${binfile}
+
+# Skip all tests if Guile scripting is not enabled.
+if { [skip_guile_tests] } { continue }
+
+gdb_install_guile_utils
+gdb_install_guile_module
+
+test_parse_and_eval
+test_value_hash
+
+# The following tests require execution.
+
+if ![gdb_guile_runto_main] {
+ fail "Can't run to main"
+ return
+}
+
+test_value_in_inferior
+test_inferior_function_call
+test_strings
+test_lazy_strings
+test_value_after_death
+
+# Test either C or C++ values.
+
+test_subscript_regression "${binfile}" "c"
+
+if ![skip_cplus_tests] {
+ if { [build_inferior "${binfile}-cxx" "c++"] < 0 } {
+ return
+ }
+ with_test_prefix "c++" {
+ test_subscript_regression "${binfile}-cxx" "c++"
+ }
+}
diff --git a/gdb/testsuite/lib/gdb.exp b/gdb/testsuite/lib/gdb.exp
index 2713ddf..4b08b57 100644
--- a/gdb/testsuite/lib/gdb.exp
+++ b/gdb/testsuite/lib/gdb.exp
@@ -4391,6 +4391,23 @@ proc get_sizeof { type default } {
return [get_integer_valueof "sizeof (${type})" $default]
}
+proc get_target_charset { } {
+ global gdb_prompt
+
+ gdb_test_multiple "show target-charset" "" {
+ -re "The target character set is \"auto; currently (\[^\"\]*)\".*$gdb_prompt $" {
+ return $expect_out(1,string)
+ }
+ -re "The target character set is \"(\[^\"\]*)\".*$gdb_prompt $" {
+ return $expect_out(1,string)
+ }
+ }
+
+ # Pick a reasonable default.
+ warning "Unable to read target-charset."
+ return "UTF-8"
+}
+
# Get the current value for remotetimeout and return it.
proc get_remotetimeout { } {
global gdb_prompt