/* Language independent support for printing types for GDB, the GNU debugger.
- Copyright (C) 1986, 1988-1989, 1991-1995, 1998-2001, 2003, 2006-2012
- Free Software Foundation, Inc.
+ Copyright (C) 1986-2017 Free Software Foundation, Inc.
This file is part of GDB.
#include "language.h"
#include "cp-abi.h"
#include "typeprint.h"
-#include "gdb_string.h"
-#include "exceptions.h"
#include "valprint.h"
-#include <errno.h>
#include <ctype.h>
#include "cli/cli-utils.h"
-
-extern void _initialize_typeprint (void);
+#include "extension.h"
+#include "completer.h"
static void ptype_command (char *, int);
1, /* raw */
1, /* print_methods */
1, /* print_typedefs */
- NULL /* local_typedefs */
+ NULL, /* local_typedefs */
+ NULL, /* global_table */
+ NULL /* global_printers */
};
/* The default flags for 'ptype' and 'whatis'. */
0, /* raw */
1, /* print_methods */
1, /* print_typedefs */
- NULL /* local_typedefs */
+ NULL, /* local_typedefs */
+ NULL, /* global_table */
+ NULL /* global_printers */
};
\f
static hashval_t
hash_typedef_field (const void *p)
{
- const struct typedef_field *tf = p;
+ const struct typedef_field *tf = (const struct typedef_field *) p;
struct type *t = check_typedef (tf->type);
return htab_hash_string (TYPE_SAFE_NAME (t));
static int
eq_typedef_field (const void *a, const void *b)
{
- const struct typedef_field *tfa = a;
- const struct typedef_field *tfb = b;
+ const struct typedef_field *tfa = (const struct typedef_field *) a;
+ const struct typedef_field *tfb = (const struct typedef_field *) b;
return types_equal (tfa->type, tfb->type);
}
static void
do_free_typedef_hash (void *arg)
{
- free_typedef_hash (arg);
+ free_typedef_hash ((struct typedef_hash_table *) arg);
}
/* Return a new cleanup that frees TABLE. */
static int
copy_typedef_hash_element (void **slot, void *nt)
{
- htab_t new_table = nt;
+ htab_t new_table = (htab_t) nt;
void **new_slot;
new_slot = htab_find_slot (new_table, *slot, INSERT);
return result;
}
+/* A cleanup to free the global typedef hash. */
+
+static void
+do_free_global_table (void *arg)
+{
+ struct type_print_options *flags = (struct type_print_options *) arg;
+
+ free_typedef_hash (flags->global_typedefs);
+ free_ext_lang_type_printers (flags->global_printers);
+}
+
+/* Create the global typedef hash. */
+
+static struct cleanup *
+create_global_typedef_table (struct type_print_options *flags)
+{
+ gdb_assert (flags->global_typedefs == NULL && flags->global_printers == NULL);
+ flags->global_typedefs = create_typedef_hash ();
+ flags->global_printers = start_ext_lang_type_printers ();
+ return make_cleanup (do_free_global_table, flags);
+}
+
+/* Look up the type T in the global typedef hash. If it is found,
+ return the typedef name. If it is not found, apply the
+ type-printers, if any, given by start_script_type_printers and return the
+ result. A NULL return means that the name was not found. */
+
+static const char *
+find_global_typedef (const struct type_print_options *flags,
+ struct type *t)
+{
+ char *applied;
+ void **slot;
+ struct typedef_field tf, *new_tf;
+
+ if (flags->global_typedefs == NULL)
+ return NULL;
+
+ tf.name = NULL;
+ tf.type = t;
+
+ slot = htab_find_slot (flags->global_typedefs->table, &tf, INSERT);
+ if (*slot != NULL)
+ {
+ new_tf = (struct typedef_field *) *slot;
+ return new_tf->name;
+ }
+
+ /* Put an entry into the hash table now, in case
+ apply_ext_lang_type_printers recurses. */
+ new_tf = XOBNEW (&flags->global_typedefs->storage, struct typedef_field);
+ new_tf->name = NULL;
+ new_tf->type = t;
+
+ *slot = new_tf;
+
+ applied = apply_ext_lang_type_printers (flags->global_printers, t);
+
+ if (applied != NULL)
+ {
+ new_tf->name
+ = (const char *) obstack_copy0 (&flags->global_typedefs->storage,
+ applied, strlen (applied));
+ xfree (applied);
+ }
+
+ return new_tf->name;
+}
+
/* Look up the type T in the typedef hash table in with FLAGS. If T
is in the table, return its short (class-relative) typedef name.
Otherwise return NULL. If the table is NULL, this always returns
const char *
find_typedef_in_hash (const struct type_print_options *flags, struct type *t)
{
- struct typedef_field tf, *found;
+ if (flags->local_typedefs != NULL)
+ {
+ struct typedef_field tf, *found;
- if (flags->local_typedefs == NULL)
- return NULL;
+ tf.name = NULL;
+ tf.type = t;
+ found = (struct typedef_field *) htab_find (flags->local_typedefs->table,
+ &tf);
- tf.name = NULL;
- tf.type = t;
- found = htab_find (flags->local_typedefs->table, &tf);
+ if (found != NULL)
+ return found->name;
+ }
- return found == NULL ? NULL : found->name;
+ return find_global_typedef (flags, t);
}
\f
NEW is the new name for a type TYPE. */
void
-typedef_print (struct type *type, struct symbol *new, struct ui_file *stream)
+typedef_print (struct type *type, struct symbol *newobj, struct ui_file *stream)
{
- LA_PRINT_TYPEDEF (type, new, stream);
+ LA_PRINT_TYPEDEF (type, newobj, stream);
}
/* The default way to print a typedef. */
/* Print TYPE to a string, returning it. The caller is responsible for
freeing the string. */
-char *
+std::string
type_to_string (struct type *type)
{
- char *s = NULL;
- struct ui_file *stb;
- struct cleanup *old_chain;
- volatile struct gdb_exception except;
-
- stb = mem_fileopen ();
- old_chain = make_cleanup_ui_file_delete (stb);
+ TRY
+ {
+ string_file stb;
- TRY_CATCH (except, RETURN_MASK_ALL)
+ type_print (type, "", &stb, -1);
+ return std::move (stb.string ());
+ }
+ CATCH (except, RETURN_MASK_ALL)
{
- type_print (type, "", stb, -1);
- s = ui_file_xstrdup (stb, NULL);
}
- if (except.reason < 0)
- s = NULL;
+ END_CATCH
- do_cleanups (old_chain);
+ return {};
+}
+
+/* See typeprint.h. */
+
+void
+type_print_unknown_return_type (struct ui_file *stream)
+{
+ fprintf_filtered (stream, _("<unknown return type>"));
+}
+
+/* See typeprint.h. */
- return s;
+void
+error_unknown_type (const char *sym_print_name)
+{
+ error (_("'%s' has unknown type; cast it to its declared type"),
+ sym_print_name);
}
/* Print type of EXP, or last thing in value history if EXP == NULL.
static void
whatis_exp (char *exp, int show)
{
- struct expression *expr;
struct value *val;
- struct cleanup *old_chain = NULL;
+ struct cleanup *old_chain;
struct type *real_type = NULL;
struct type *type;
int full = 0;
- int top = -1;
+ LONGEST top = -1;
int using_enc = 0;
struct value_print_options opts;
struct type_print_options flags = default_ptype_flags;
+ old_chain = make_cleanup (null_cleanup, NULL);
+
if (exp)
{
if (*exp == '/')
exp = skip_spaces (exp);
}
- expr = parse_expression (exp);
- old_chain = make_cleanup (free_current_contents, &expr);
- val = evaluate_type (expr);
+ expression_up expr = parse_expression (exp);
+
+ /* The behavior of "whatis" depends on whether the user
+ expression names a type directly, or a language expression
+ (including variable names). If the former, then "whatis"
+ strips one level of typedefs, only. If an expression,
+ "whatis" prints the type of the expression without stripping
+ any typedef level. "ptype" always strips all levels of
+ typedefs. */
+ if (show == -1 && expr->elts[0].opcode == OP_TYPE)
+ {
+ /* The user expression names a type directly. */
+ type = expr->elts[1].type;
+
+ /* If this is a typedef, then find its immediate target.
+ Use check_typedef to resolve stubs, but ignore its result
+ because we do not want to dig past all typedefs. */
+ check_typedef (type);
+ if (TYPE_CODE (type) == TYPE_CODE_TYPEDEF)
+ type = TYPE_TARGET_TYPE (type);
+ }
+ else
+ {
+ /* The user expression names a type indirectly by naming an
+ object or expression of that type. Find that
+ indirectly-named type. */
+ val = evaluate_type (expr.get ());
+ type = value_type (val);
+ }
}
else
- val = access_value_history (0);
-
- type = value_type (val);
+ {
+ val = access_value_history (0);
+ type = value_type (val);
+ }
get_user_print_options (&opts);
if (opts.objectprint)
{
- if (((TYPE_CODE (type) == TYPE_CODE_PTR)
- || (TYPE_CODE (type) == TYPE_CODE_REF))
- && (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_CLASS))
+ if (((TYPE_CODE (type) == TYPE_CODE_PTR) || TYPE_IS_REFERENCE (type))
+ && (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_STRUCT))
real_type = value_rtti_indirect_type (val, &full, &top, &using_enc);
- else if (TYPE_CODE (type) == TYPE_CODE_CLASS)
+ else if (TYPE_CODE (type) == TYPE_CODE_STRUCT)
real_type = value_rtti_type (val, &full, &top, &using_enc);
}
printf_filtered ("type = ");
+ if (!flags.raw)
+ create_global_typedef_table (&flags);
+
if (real_type)
{
printf_filtered ("/* real type = ");
LA_PRINT_TYPE (type, "", gdb_stdout, show, 0, &flags);
printf_filtered ("\n");
- if (exp)
- do_cleanups (old_chain);
+ do_cleanups (old_chain);
}
static void
/* TYPENAME is either the name of a type, or an expression. */
static void
-ptype_command (char *typename, int from_tty)
+ptype_command (char *type_name, int from_tty)
{
- whatis_exp (typename, 1);
+ whatis_exp (type_name, 1);
}
/* Print integral scalar data VAL, of type TYPE, onto stdio stream STREAM.
unsigned int i;
unsigned len;
- CHECK_TYPEDEF (type);
+ type = check_typedef (type);
switch (TYPE_CODE (type))
{
case TYPE_CODE_METHODPTR:
case TYPE_CODE_METHOD:
case TYPE_CODE_REF:
+ case TYPE_CODE_RVALUE_REF:
case TYPE_CODE_NAMESPACE:
error (_("internal error: unhandled type in print_type_scalar"));
break;
and whatis_command(). */
void
-maintenance_print_type (char *typename, int from_tty)
+maintenance_print_type (const char *type_name, int from_tty)
{
struct value *val;
struct type *type;
- struct cleanup *old_chain;
- struct expression *expr;
- if (typename != NULL)
+ if (type_name != NULL)
{
- expr = parse_expression (typename);
- old_chain = make_cleanup (free_current_contents, &expr);
+ expression_up expr = parse_expression (type_name);
if (expr->elts[0].opcode == OP_TYPE)
{
/* The user expression names a type directly, just use that type. */
{
/* The user expression may name a type indirectly by naming an
object of that type. Find that indirectly named type. */
- val = evaluate_type (expr);
+ val = evaluate_type (expr.get ());
type = value_type (val);
}
if (type != NULL)
{
recursive_dump_type (type, 0);
}
- do_cleanups (old_chain);
}
}
\f
{
printf_unfiltered (
"\"set print type\" must be followed by the name of a subcommand.\n");
- help_list (setprintlist, "set print type ", -1, gdb_stdout);
+ help_list (setprintlist, "set print type ", all_commands, gdb_stdout);
}
static void
void
_initialize_typeprint (void)
{
- add_com ("ptype", class_vars, ptype_command, _("\
+ struct cmd_list_element *c;
+
+ c = add_com ("ptype", class_vars, ptype_command, _("\
Print definition of type TYPE.\n\
-Usage: ptype[/FLAGS] TYPE-NAME | EXPRESSION\n\
-Argument may be a type name defined by typedef, or \"struct STRUCT-TAG\"\n\
-or \"class CLASS-NAME\" or \"union UNION-TAG\" or \"enum ENUM-TAG\".\n\
+Usage: ptype[/FLAGS] TYPE | EXPRESSION\n\
+Argument may be any type (for example a type name defined by typedef,\n\
+or \"struct STRUCT-TAG\" or \"class CLASS-NAME\" or \"union UNION-TAG\"\n\
+or \"enum ENUM-TAG\") or an expression.\n\
The selected stack frame's lexical context is used to look up the name.\n\
Contrary to \"whatis\", \"ptype\" always unrolls any typedefs.\n\
\n\
/M print methods defined in a class\n\
/t do not print typedefs defined in a class\n\
/T print typedefs defined in a class"));
+ set_cmd_completer (c, expression_completer);
- add_com ("whatis", class_vars, whatis_command,
- _("Print data type of expression EXP.\n\
+ c = add_com ("whatis", class_vars, whatis_command,
+ _("Print data type of expression EXP.\n\
Only one level of typedefs is unrolled. See also \"ptype\"."));
+ set_cmd_completer (c, expression_completer);
add_prefix_cmd ("type", no_class, show_print_type,
_("Generic command for showing type-printing settings."),
show_print_type_typedefs,
&setprinttypelist, &showprinttypelist);
}
+
+/* Print <not allocated> status to stream STREAM. */
+
+void
+val_print_not_allocated (struct ui_file *stream)
+{
+ fprintf_filtered (stream, _("<not allocated>"));
+}
+
+/* Print <not associated> status to stream STREAM. */
+
+void
+val_print_not_associated (struct ui_file *stream)
+{
+ fprintf_filtered (stream, _("<not associated>"));
+}
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