/* Implementation of the GDB variable objects API.
- Copyright 1999, 2000, 2001, 2005 Free Software Foundation, Inc.
+ Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
+ 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
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA. */
#include "defs.h"
+#include "exceptions.h"
#include "value.h"
#include "expression.h"
#include "frame.h"
#include "language.h"
#include "wrapper.h"
#include "gdbcmd.h"
+
+#include "gdb_assert.h"
#include "gdb_string.h"
-#include <math.h>
#include "varobj.h"
/* Non-zero if we want to see trace of varobj level stuff. */
int varobjdebug = 0;
+static void
+show_varobjdebug (struct ui_file *file, int from_tty,
+ struct cmd_list_element *c, const char *value)
+{
+ fprintf_filtered (file, _("Varobj debugging is %s.\n"), value);
+}
/* String representations of gdb's format codes */
char *varobj_format_string[] =
return thetype;
}
+/* Obtain the type of an object variable. */
+
+struct type *
+varobj_get_gdb_type (struct varobj *var)
+{
+ return var->type;
+}
+
enum varobj_languages
varobj_get_language (struct varobj *var)
{
varobj_set_value (struct varobj *var, char *expression)
{
struct value *val;
- int error;
int offset = 0;
+ int error = 0;
/* The argument "expression" contains the variable's new value.
We need to first construct a legal expression for this -- ugh! */
int i;
input_radix = 10; /* ALWAYS reset to decimal temporarily */
- if (!gdb_parse_exp_1 (&s, 0, 0, &exp))
- /* We cannot proceed without a well-formed expression. */
- return 0;
+ exp = parse_exp_1 (&s, 0, 0);
if (!gdb_evaluate_expression (exp, &value))
{
/* We cannot proceed without a valid expression. */
varobj_update (struct varobj **varp, struct varobj ***changelist)
{
int changed = 0;
+ int error = 0;
int type_changed;
int i;
int vleft;
- int error2;
struct varobj *v;
struct varobj **cv;
struct varobj **templist = NULL;
There a couple of exceptions here, though.
We don't want some types to be reported as "changed". */
else if (type_changeable (*varp) &&
- ((*varp)->updated || !my_value_equal ((*varp)->value, new, &error2)))
+ ((*varp)->updated || !my_value_equal ((*varp)->value, new, &error)))
{
vpush (&result, *varp);
(*varp)->updated = 0;
changed++;
- /* error2 replaces var->error since this new value
- WILL replace the old one. */
- (*varp)->error = error2;
+ /* Its value is going to be updated to NEW. */
+ (*varp)->error = error;
}
/* We must always keep around the new value for this root
/* Update this variable */
new = value_of_child (v->parent, v->index);
if (type_changeable (v) &&
- (v->updated || !my_value_equal (v->value, new, &error2)))
+ (v->updated || !my_value_equal (v->value, new, &error)))
{
/* Note that it's changed */
vpush (&result, v);
v->updated = 0;
changed++;
}
- /* error2 replaces v->error since this new value
- WILL replace the old one. */
- v->error = error2;
+ /* Its value is going to be updated to NEW. */
+ v->error = error;
/* We must always keep new values, since children depend on it. */
if (v->value != NULL)
/* Free the expression if this is a root variable. */
if (var->root->rootvar == var)
{
- free_current_contents ((char **) &var->root->exp);
+ free_current_contents (&var->root->exp);
xfree (var->root);
}
return FORMAT_NATURAL;
}
-/* This function is similar to gdb's value_equal, except that this
- one is "safe" -- it NEVER longjmps. It determines if the VAR's
- value is the same as VAL2. */
+/* This function is similar to GDB's value_contents_equal, except that
+ this one is "safe"; it never longjmps. It determines if the VAL1's
+ value is the same as VAL2. If for some reason the value of VAR2
+ can't be established, *ERROR2 is set to non-zero. */
+
static int
-my_value_equal (struct value *val1, struct value *val2, int *error2)
+my_value_equal (struct value *val1, struct value *volatile val2, int *error2)
{
- int r, err1, err2;
+ volatile struct gdb_exception except;
- *error2 = 0;
- /* Special case: NULL values. If both are null, say
- they're equal. */
+ /* As a special case, if both are null, we say they're equal. */
if (val1 == NULL && val2 == NULL)
return 1;
else if (val1 == NULL || val2 == NULL)
return 0;
- /* This is bogus, but unfortunately necessary. We must know
- exactly what caused an error -- reading val1 or val2 -- so
- that we can really determine if we think that something has changed. */
- err1 = 0;
- err2 = 0;
- /* We do need to catch errors here because the whole purpose
- is to test if value_equal() has errored */
- if (!gdb_value_equal (val1, val1, &r))
- err1 = 1;
-
- if (!gdb_value_equal (val2, val2, &r))
- *error2 = err2 = 1;
-
- if (err1 != err2)
- return 0;
+ /* The contents of VAL1 are supposed to be known. */
+ gdb_assert (!value_lazy (val1));
- if (!gdb_value_equal (val1, val2, &r))
+ /* Make sure we also know the contents of VAL2. */
+ val2 = coerce_array (val2);
+ TRY_CATCH (except, RETURN_MASK_ERROR)
{
- /* An error occurred, this could have happened if
- either val1 or val2 errored. ERR1 and ERR2 tell
- us which of these it is. If both errored, then
- we assume nothing has changed. If one of them is
- valid, though, then something has changed. */
- if (err1 == err2)
- {
- /* both the old and new values caused errors, so
- we say the value did not change */
- /* This is indeterminate, though. Perhaps we should
- be safe and say, yes, it changed anyway?? */
- return 1;
- }
- else
- {
- return 0;
- }
+ if (value_lazy (val2))
+ value_fetch_lazy (val2);
}
+ if (except.reason < 0)
+ {
+ *error2 = 1;
+ return 0;
+ }
+ gdb_assert (!value_lazy (val2));
- return r;
+ return value_contents_equal (val1, val2);
}
/* FIXME: The following should be generic for any pointer */
switch (TYPE_CODE (type))
{
case TYPE_CODE_ARRAY:
- name = xstrprintf ("%d", index);
+ name = xstrprintf ("%d", index
+ + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type)));
break;
case TYPE_CODE_STRUCT:
struct value *indval;
struct type *type, *target;
char *name;
+ int real_index;
type = get_type (parent);
target = get_target_type (type);
switch (TYPE_CODE (type))
{
case TYPE_CODE_ARRAY:
+ real_index = index + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type));
#if 0
/* This breaks if the array lives in a (vector) register. */
- value = value_slice (temp, index, 1);
+ value = value_slice (temp, real_index, 1);
temp = value_coerce_array (value);
gdb_value_ind (temp, &value);
#else
- indval = value_from_longest (builtin_type_int, (LONGEST) index);
+ indval = value_from_longest (builtin_type_int, (LONGEST) real_index);
gdb_value_subscript (temp, indval, &value);
#endif
break;
static char *
c_value_of_variable (struct varobj *var)
{
- /* BOGUS: if val_print sees a struct/class, it will print out its
- children instead of "{...}" */
+ /* BOGUS: if val_print sees a struct/class, or a reference to one,
+ it will print out its children instead of "{...}". So we need to
+ catch that case explicitly. */
+ struct type *type = get_type (var);
- switch (TYPE_CODE (get_type (var)))
+ /* Strip top-level references. */
+ while (TYPE_CODE (type) == TYPE_CODE_REF)
+ type = check_typedef (TYPE_TARGET_TYPE (type));
+
+ switch (TYPE_CODE (type))
{
case TYPE_CODE_STRUCT:
case TYPE_CODE_UNION:
if (value_lazy (var->value))
gdb_value_fetch_lazy (var->value);
- val_print (value_type (var->value),
- value_contents_raw (var->value), 0,
- VALUE_ADDRESS (var->value), stb,
- format_code[(int) var->format], 1, 0, 0);
+ common_val_print (var->value, stb,
+ format_code[(int) var->format], 1, 0, 0);
thevalue = ui_file_xstrdup (stb, &dummy);
do_cleanups (old_chain);
return thevalue;
varobj_table = xmalloc (sizeof_table);
memset (varobj_table, 0, sizeof_table);
- deprecated_add_show_from_set (add_set_cmd ("debugvarobj", class_maintenance, var_zinteger, (char *) &varobjdebug, "Set varobj debugging.\n\
-When non-zero, varobj debugging is enabled.", &setlist),
- &showlist);
+ add_setshow_zinteger_cmd ("debugvarobj", class_maintenance,
+ &varobjdebug, _("\
+Set varobj debugging."), _("\
+Show varobj debugging."), _("\
+When non-zero, varobj debugging is enabled."),
+ NULL,
+ show_varobjdebug,
+ &setlist, &showlist);
}
projects / deliverable / binutils-gdb.git / blobdiff