/* Implementation of the GDB variable objects API.
- Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
- 2009, 2010, 2011 Free Software Foundation, Inc.
+ Copyright (C) 1999-2013 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
#include "expression.h"
#include "frame.h"
#include "language.h"
-#include "wrapper.h"
#include "gdbcmd.h"
#include "block.h"
#include "valprint.h"
#include "vec.h"
#include "gdbthread.h"
#include "inferior.h"
+#include "ada-varobj.h"
+#include "ada-lang.h"
#if HAVE_PYTHON
#include "python/python.h"
typedef int PyObject;
#endif
+/* The names of varobjs representing anonymous structs or unions. */
+#define ANONYMOUS_STRUCT_NAME _("<anonymous struct>")
+#define ANONYMOUS_UNION_NAME _("<anonymous union>")
+
/* Non-zero if we want to see trace of varobj level stuff. */
-int varobjdebug = 0;
+unsigned int varobjdebug = 0;
static void
show_varobjdebug (struct ui_file *file, int from_tty,
struct cmd_list_element *c, const char *value)
{ "natural", "binary", "decimal", "hexadecimal", "octal" };
/* String representations of gdb's known languages. */
-char *varobj_language_string[] = { "unknown", "C", "C++", "Java" };
+char *varobj_language_string[] = { "C", "C++", "Java" };
/* True if we want to allow Python-based pretty-printing. */
static int pretty_printing = 0;
struct expression *exp;
/* Block for which this expression is valid. */
- struct block *valid_block;
+ const struct block *valid_block;
/* The frame for this expression. This field is set iff valid_block is
not NULL. */
struct varobj_root *next;
};
-/* Every variable in the system has a structure of this type defined
- for it. This structure holds all information necessary to manipulate
- a particular object variable. Members which must be freed are noted. */
-struct varobj
-{
-
- /* Alloc'd name of the variable for this object. If this variable is a
- child, then this name will be the child's source name.
- (bar, not foo.bar). */
- /* NOTE: This is the "expression". */
- char *name;
-
- /* Alloc'd expression for this child. Can be used to create a
- root variable corresponding to this child. */
- char *path_expr;
-
- /* The alloc'd name for this variable's object. This is here for
- convenience when constructing this object's children. */
- char *obj_name;
-
- /* Index of this variable in its parent or -1. */
- int index;
-
- /* The type of this variable. This can be NULL
- for artifial variable objects -- currently, the "accessibility"
- variable objects in C++. */
- struct type *type;
-
- /* The value of this expression or subexpression. A NULL value
- indicates there was an error getting this value.
- Invariant: if varobj_value_is_changeable_p (this) is non-zero,
- the value is either NULL, or not lazy. */
- struct value *value;
-
- /* The number of (immediate) children this variable has. */
- int num_children;
-
- /* If this object is a child, this points to its immediate parent. */
- struct varobj *parent;
-
- /* Children of this object. */
- VEC (varobj_p) *children;
+/* Dynamic part of varobj. */
+struct varobj_dynamic
+{
/* Whether the children of this varobj were requested. This field is
used to decide if dynamic varobj should recompute their children.
In the event that the frontend never asked for the children, we
can avoid that. */
int children_requested;
- /* Description of the root variable. Points to root variable for
- children. */
- struct varobj_root *root;
-
- /* The format of the output for this object. */
- enum varobj_display_formats format;
-
- /* Was this variable updated via a varobj_set_value operation. */
- int updated;
-
- /* Last print value. */
- char *print_value;
-
- /* Is this variable frozen. Frozen variables are never implicitly
- updated by -var-update *
- or -var-update <direct-or-indirect-parent>. */
- int frozen;
-
- /* Is the value of this variable intentionally not fetched? It is
- not fetched if either the variable is frozen, or any parents is
- frozen. */
- int not_fetched;
-
- /* Sub-range of children which the MI consumer has requested. If
- FROM < 0 or TO < 0, means that all children have been
- requested. */
- int from;
- int to;
-
/* The pretty-printer constructor. If NULL, then the default
pretty-printer will be looked up. If None, then no
pretty-printer will be installed. */
static struct varobj *create_child (struct varobj *, int, char *);
static struct varobj *
-create_child_with_value (struct varobj *parent, int index, const char *name,
+create_child_with_value (struct varobj *parent, int index, char *name,
struct value *value);
/* Utility routines */
static char *cppop (struct cpstack **pstack);
+static int update_type_if_necessary (struct varobj *var,
+ struct value *new_value);
+
static int install_new_value (struct varobj *var, struct value *value,
int initial);
#if HAVE_PYTHON
static struct varobj *varobj_add_child (struct varobj *var,
- const char *name,
+ char *name,
struct value *value);
#endif /* HAVE_PYTHON */
+static int default_value_is_changeable_p (struct varobj *var);
+
/* C implementation */
static int c_number_of_children (struct varobj *var);
static char *c_path_expr_of_child (struct varobj *child);
-static struct value *c_value_of_root (struct varobj **var_handle);
-
static struct value *c_value_of_child (struct varobj *parent, int index);
static struct type *c_type_of_child (struct varobj *parent, int index);
static char *cplus_path_expr_of_child (struct varobj *child);
-static struct value *cplus_value_of_root (struct varobj **var_handle);
-
static struct value *cplus_value_of_child (struct varobj *parent, int index);
static struct type *cplus_type_of_child (struct varobj *parent, int index);
static char *java_path_expr_of_child (struct varobj *child);
-static struct value *java_value_of_root (struct varobj **var_handle);
-
static struct value *java_value_of_child (struct varobj *parent, int index);
static struct type *java_type_of_child (struct varobj *parent, int index);
static char *ada_path_expr_of_child (struct varobj *child);
-static struct value *ada_value_of_root (struct varobj **var_handle);
-
static struct value *ada_value_of_child (struct varobj *parent, int index);
static struct type *ada_type_of_child (struct varobj *parent, int index);
static char *ada_value_of_variable (struct varobj *var,
enum varobj_display_formats format);
+static int ada_value_is_changeable_p (struct varobj *var);
+
+static int ada_value_has_mutated (struct varobj *var, struct value *new_val,
+ struct type *new_type);
+
/* The language specific vector */
struct language_specific
{
-
- /* The language of this variable. */
- enum varobj_languages language;
-
/* The number of children of PARENT. */
int (*number_of_children) (struct varobj * parent);
obtain that has some parent. */
char *(*path_expr_of_child) (struct varobj * child);
- /* The ``struct value *'' of the root variable ROOT. */
- struct value *(*value_of_root) (struct varobj ** root_handle);
-
/* The ``struct value *'' of the INDEX'th child of PARENT. */
struct value *(*value_of_child) (struct varobj * parent, int index);
/* The current value of VAR. */
char *(*value_of_variable) (struct varobj * var,
enum varobj_display_formats format);
+
+ /* Return non-zero if changes in value of VAR must be detected and
+ reported by -var-update. Return zero if -var-update should never
+ report changes of such values. This makes sense for structures
+ (since the changes in children values will be reported separately),
+ or for artifical objects (like 'public' pseudo-field in C++).
+
+ Return value of 0 means that gdb need not call value_fetch_lazy
+ for the value of this variable object. */
+ int (*value_is_changeable_p) (struct varobj *var);
+
+ /* Return nonzero if the type of VAR has mutated.
+
+ VAR's value is still the varobj's previous value, while NEW_VALUE
+ is VAR's new value and NEW_TYPE is the var's new type. NEW_VALUE
+ may be NULL indicating that there is no value available (the varobj
+ may be out of scope, of may be the child of a null pointer, for
+ instance). NEW_TYPE, on the other hand, must never be NULL.
+
+ This function should also be able to assume that var's number of
+ children is set (not < 0).
+
+ Languages where types do not mutate can set this to NULL. */
+ int (*value_has_mutated) (struct varobj *var, struct value *new_value,
+ struct type *new_type);
};
/* Array of known source language routines. */
static struct language_specific languages[vlang_end] = {
- /* Unknown (try treating as C). */
- {
- vlang_unknown,
- c_number_of_children,
- c_name_of_variable,
- c_name_of_child,
- c_path_expr_of_child,
- c_value_of_root,
- c_value_of_child,
- c_type_of_child,
- c_value_of_variable}
- ,
/* C */
{
- vlang_c,
c_number_of_children,
c_name_of_variable,
c_name_of_child,
c_path_expr_of_child,
- c_value_of_root,
c_value_of_child,
c_type_of_child,
- c_value_of_variable}
+ c_value_of_variable,
+ default_value_is_changeable_p,
+ NULL /* value_has_mutated */}
,
/* C++ */
{
- vlang_cplus,
cplus_number_of_children,
cplus_name_of_variable,
cplus_name_of_child,
cplus_path_expr_of_child,
- cplus_value_of_root,
cplus_value_of_child,
cplus_type_of_child,
- cplus_value_of_variable}
+ cplus_value_of_variable,
+ default_value_is_changeable_p,
+ NULL /* value_has_mutated */}
,
/* Java */
{
- vlang_java,
java_number_of_children,
java_name_of_variable,
java_name_of_child,
java_path_expr_of_child,
- java_value_of_root,
java_value_of_child,
java_type_of_child,
- java_value_of_variable},
+ java_value_of_variable,
+ default_value_is_changeable_p,
+ NULL /* value_has_mutated */},
/* Ada */
{
- vlang_ada,
ada_number_of_children,
ada_name_of_variable,
ada_name_of_child,
ada_path_expr_of_child,
- ada_value_of_root,
ada_value_of_child,
ada_type_of_child,
- ada_value_of_variable}
+ ada_value_of_variable,
+ ada_value_is_changeable_p,
+ ada_value_has_mutated}
};
/* A little convenience enum for dealing with C++/Java. */
#ifdef HAVE_PYTHON
/* Helper function to install a Python environment suitable for
use during operations on VAR. */
-struct cleanup *
+static struct cleanup *
varobj_ensure_python_env (struct varobj *var)
{
return ensure_python_env (var->root->exp->gdbarch,
struct frame_info *fi;
struct frame_id old_id = null_frame_id;
struct block *block;
- char *p;
+ const char *p;
enum varobj_languages lang;
struct value *value = NULL;
+ volatile struct gdb_exception except;
+ CORE_ADDR pc;
/* Parse and evaluate the expression, filling in as much of the
variable's data as possible. */
if (type == USE_SELECTED_FRAME)
var->root->floating = 1;
+ pc = 0;
block = NULL;
if (fi != NULL)
- block = get_frame_block (fi, 0);
+ {
+ block = get_frame_block (fi, 0);
+ pc = get_frame_pc (fi);
+ }
p = expression;
innermost_block = NULL;
/* Wrap the call to parse expression, so we can
return a sensible error. */
- if (!gdb_parse_exp_1 (&p, block, 0, &var->root->exp))
+ TRY_CATCH (except, RETURN_MASK_ERROR)
+ {
+ var->root->exp = parse_exp_1 (&p, pc, block, 0);
+ }
+
+ if (except.reason < 0)
{
do_cleanups (old_chain);
return NULL;
}
/* Don't allow variables to be created for types. */
- if (var->root->exp->elts[0].opcode == OP_TYPE)
+ if (var->root->exp->elts[0].opcode == OP_TYPE
+ || var->root->exp->elts[0].opcode == OP_TYPEOF
+ || var->root->exp->elts[0].opcode == OP_DECLTYPE)
{
do_cleanups (old_chain);
fprintf_unfiltered (gdb_stderr, "Attempt to use a type name"
/* We definitely need to catch errors here.
If evaluate_expression succeeds we got the value we wanted.
But if it fails, we still go on with a call to evaluate_type(). */
- if (!gdb_evaluate_expression (var->root->exp, &value))
+ TRY_CATCH (except, RETURN_MASK_ERROR)
+ {
+ value = evaluate_expression (var->root->exp);
+ }
+
+ if (except.reason < 0)
{
/* Error getting the value. Try to at least get the
right type. */
var->type = value_type (type_only_value);
}
- else
- var->type = value_type (value);
+ else
+ {
+ int real_type_found = 0;
- install_new_value (var, value, 1 /* Initial assignment */);
+ var->type = value_actual_type (value, 0, &real_type_found);
+ if (real_type_found)
+ value = value_cast (var->type, value);
+ }
/* Set language info */
lang = variable_language (var);
var->root->lang = &languages[lang];
+ install_new_value (var, value, 1 /* Initial assignment */);
+
/* Set ourselves as our root. */
var->root->rootvar = var;
char *result = NULL;
#if HAVE_PYTHON
- struct cleanup *back_to = varobj_ensure_python_env (var);
+ struct cleanup *back_to;
+
+ if (!gdb_python_initialized)
+ return NULL;
+
+ back_to = varobj_ensure_python_env (var);
- if (var->pretty_printer)
- result = gdbpy_get_display_hint (var->pretty_printer);
+ if (var->dynamic->pretty_printer != NULL)
+ result = gdbpy_get_display_hint (var->dynamic->pretty_printer);
do_cleanups (back_to);
#endif
if (VEC_length (varobj_p, var->children) > to)
return 1;
return ((to == -1 || VEC_length (varobj_p, var->children) == to)
- && var->saved_item != NULL);
+ && (var->dynamic->saved_item != NULL));
}
/* If the variable object is bound to a specific thread, that
static void
install_dynamic_child (struct varobj *var,
VEC (varobj_p) **changed,
+ VEC (varobj_p) **type_changed,
VEC (varobj_p) **new,
VEC (varobj_p) **unchanged,
int *cchanged,
int index,
- const char *name,
+ char *name,
struct value *value)
{
if (VEC_length (varobj_p, var->children) < index + 1)
*cchanged = 1;
}
}
- else
+ else
{
varobj_p existing = VEC_index (varobj_p, var->children, index);
+ int type_updated = update_type_if_necessary (existing, value);
+ if (type_updated)
+ {
+ if (type_changed)
+ VEC_safe_push (varobj_p, *type_changed, existing);
+ }
if (install_new_value (existing, value, 0))
{
- if (changed)
+ if (!type_updated && changed)
VEC_safe_push (varobj_p, *changed, existing);
}
- else if (unchanged)
+ else if (!type_updated && unchanged)
VEC_safe_push (varobj_p, *unchanged, existing);
}
}
dynamic_varobj_has_child_method (struct varobj *var)
{
struct cleanup *back_to;
- PyObject *printer = var->pretty_printer;
+ PyObject *printer = var->dynamic->pretty_printer;
int result;
+ if (!gdb_python_initialized)
+ return 0;
+
back_to = varobj_ensure_python_env (var);
result = PyObject_HasAttr (printer, gdbpy_children_cst);
do_cleanups (back_to);
static int
update_dynamic_varobj_children (struct varobj *var,
VEC (varobj_p) **changed,
+ VEC (varobj_p) **type_changed,
VEC (varobj_p) **new,
VEC (varobj_p) **unchanged,
int *cchanged,
struct cleanup *back_to;
PyObject *children;
int i;
- PyObject *printer = var->pretty_printer;
+ PyObject *printer = var->dynamic->pretty_printer;
+
+ if (!gdb_python_initialized)
+ return 0;
back_to = varobj_ensure_python_env (var);
return 0;
}
- if (update_children || !var->child_iter)
+ if (update_children || var->dynamic->child_iter == NULL)
{
children = PyObject_CallMethodObjArgs (printer, gdbpy_children_cst,
NULL);
make_cleanup_py_decref (children);
- if (!PyIter_Check (children))
- error (_("Returned value is not iterable"));
-
- Py_XDECREF (var->child_iter);
- var->child_iter = PyObject_GetIter (children);
- if (!var->child_iter)
+ Py_XDECREF (var->dynamic->child_iter);
+ var->dynamic->child_iter = PyObject_GetIter (children);
+ if (var->dynamic->child_iter == NULL)
{
gdbpy_print_stack ();
error (_("Could not get children iterator"));
}
- Py_XDECREF (var->saved_item);
- var->saved_item = NULL;
+ Py_XDECREF (var->dynamic->saved_item);
+ var->dynamic->saved_item = NULL;
i = 0;
}
int force_done = 0;
/* See if there was a leftover from last time. */
- if (var->saved_item)
+ if (var->dynamic->saved_item)
{
- item = var->saved_item;
- var->saved_item = NULL;
+ item = var->dynamic->saved_item;
+ var->dynamic->saved_item = NULL;
}
else
- item = PyIter_Next (var->child_iter);
+ item = PyIter_Next (var->dynamic->child_iter);
if (!item)
{
if (v == NULL)
gdbpy_print_stack ();
install_dynamic_child (var, can_mention ? changed : NULL,
+ can_mention ? type_changed : NULL,
can_mention ? new : NULL,
can_mention ? unchanged : NULL,
- can_mention ? cchanged : NULL, i, name, v);
+ can_mention ? cchanged : NULL, i,
+ xstrdup (name), v);
do_cleanups (inner);
}
else
{
- Py_XDECREF (var->saved_item);
- var->saved_item = item;
+ Py_XDECREF (var->dynamic->saved_item);
+ var->dynamic->saved_item = item;
/* We want to truncate the child list just before this
element. */
return 1;
#else
- gdb_assert (0 && "should never be called if Python is not enabled");
+ gdb_assert_not_reached ("should never be called if Python is not enabled");
#endif
}
{
if (var->num_children == -1)
{
- if (var->pretty_printer)
+ if (var->dynamic->pretty_printer != NULL)
{
int dummy;
/* If we have a dynamic varobj, don't report -1 children.
So, try to fetch some children first. */
- update_dynamic_varobj_children (var, NULL, NULL, NULL, &dummy,
+ update_dynamic_varobj_children (var, NULL, NULL, NULL, NULL, &dummy,
0, 0, 0);
}
else
char *name;
int i, children_changed;
- var->children_requested = 1;
+ var->dynamic->children_requested = 1;
- if (var->pretty_printer)
+ if (var->dynamic->pretty_printer != NULL)
{
/* This, in theory, can result in the number of children changing without
frontend noticing. But well, calling -var-list-children on the same
varobj twice is not something a sane frontend would do. */
- update_dynamic_varobj_children (var, NULL, NULL, NULL, &children_changed,
- 0, 0, *to);
+ update_dynamic_varobj_children (var, NULL, NULL, NULL, NULL,
+ &children_changed, 0, 0, *to);
restrict_range (var->children, from, to);
return var->children;
}
#if HAVE_PYTHON
static struct varobj *
-varobj_add_child (struct varobj *var, const char *name, struct value *value)
+varobj_add_child (struct varobj *var, char *name, struct value *value)
{
varobj_p v = create_child_with_value (var,
VEC_length (varobj_p, var->children),
return var->type;
}
+/* Is VAR a path expression parent, i.e., can it be used to construct
+ a valid path expression? */
+
+static int
+is_path_expr_parent (struct varobj *var)
+{
+ struct type *type;
+
+ /* "Fake" children are not path_expr parents. */
+ if (CPLUS_FAKE_CHILD (var))
+ return 0;
+
+ type = get_value_type (var);
+
+ /* Anonymous unions and structs are also not path_expr parents. */
+ return !((TYPE_CODE (type) == TYPE_CODE_STRUCT
+ || TYPE_CODE (type) == TYPE_CODE_UNION)
+ && TYPE_NAME (type) == NULL);
+}
+
+/* Return the path expression parent for VAR. */
+
+static struct varobj *
+get_path_expr_parent (struct varobj *var)
+{
+ struct varobj *parent = var;
+
+ while (!is_root_p (parent) && !is_path_expr_parent (parent))
+ parent = parent->parent;
+
+ return parent;
+}
+
/* Return a pointer to the full rooted expression of varobj VAR.
If it has not been computed yet, compute it. */
char *
int
varobj_pretty_printed_p (struct varobj *var)
{
- return var->pretty_printer != NULL;
+ return var->dynamic->pretty_printer != NULL;
}
char *
int
varobj_set_value (struct varobj *var, char *expression)
{
- struct value *val;
-
+ struct value *val = NULL; /* Initialize to keep gcc happy. */
/* The argument "expression" contains the variable's new value.
We need to first construct a legal expression for this -- ugh! */
/* Does this cover all the bases? */
struct expression *exp;
- struct value *value;
+ struct value *value = NULL; /* Initialize to keep gcc happy. */
int saved_input_radix = input_radix;
- char *s = expression;
+ const char *s = expression;
+ volatile struct gdb_exception except;
gdb_assert (varobj_editable_p (var));
input_radix = 10; /* ALWAYS reset to decimal temporarily. */
- exp = parse_exp_1 (&s, 0, 0);
- if (!gdb_evaluate_expression (exp, &value))
+ exp = parse_exp_1 (&s, 0, 0, 0);
+ TRY_CATCH (except, RETURN_MASK_ERROR)
+ {
+ value = evaluate_expression (exp);
+ }
+
+ if (except.reason < 0)
{
/* We cannot proceed without a valid expression. */
xfree (exp);
array's content. */
value = coerce_array (value);
- /* The new value may be lazy. gdb_value_assign, or
- rather value_contents, will take care of this.
- If fetching of the new value will fail, gdb_value_assign
- with catch the exception. */
- if (!gdb_value_assign (var->value, value, &val))
+ /* The new value may be lazy. value_assign, or
+ rather value_contents, will take care of this. */
+ TRY_CATCH (except, RETURN_MASK_ERROR)
+ {
+ val = value_assign (var->value, value);
+ }
+
+ if (except.reason < 0)
return 0;
-
+
/* If the value has changed, record it, so that next -var-update can
report this change. If a variable had a value of '1', we've set it
to '333' and then set again to '1', when -var-update will report this
#if HAVE_PYTHON
/* A helper function to install a constructor function and visualizer
- in a varobj. */
+ in a varobj_dynamic. */
static void
-install_visualizer (struct varobj *var, PyObject *constructor,
+install_visualizer (struct varobj_dynamic *var, PyObject *constructor,
PyObject *visualizer)
{
Py_XDECREF (var->constructor);
pretty_printer = NULL;
}
- install_visualizer (var, NULL, pretty_printer);
+ install_visualizer (var->dynamic, NULL, pretty_printer);
}
}
}
}
- install_visualizer (var, constructor, pretty_printer);
+ install_visualizer (var->dynamic, constructor, pretty_printer);
}
#endif /* HAVE_PYTHON */
#if HAVE_PYTHON
/* If the constructor is None, then we want the raw value. If VAR
does not have a value, just skip this. */
- if (var->constructor != Py_None && var->value)
+ if (!gdb_python_initialized)
+ return;
+
+ if (var->dynamic->constructor != Py_None && var->value != NULL)
{
struct cleanup *cleanup;
cleanup = varobj_ensure_python_env (var);
- if (!var->constructor)
+ if (var->dynamic->constructor == NULL)
install_default_visualizer (var);
else
- construct_visualizer (var, var->constructor);
+ construct_visualizer (var, var->dynamic->constructor);
do_cleanups (cleanup);
}
#endif
}
+/* When using RTTI to determine variable type it may be changed in runtime when
+ the variable value is changed. This function checks whether type of varobj
+ VAR will change when a new value NEW_VALUE is assigned and if it is so
+ updates the type of VAR. */
+
+static int
+update_type_if_necessary (struct varobj *var, struct value *new_value)
+{
+ if (new_value)
+ {
+ struct value_print_options opts;
+
+ get_user_print_options (&opts);
+ if (opts.objectprint)
+ {
+ struct type *new_type;
+ char *curr_type_str, *new_type_str;
+
+ new_type = value_actual_type (new_value, 0, 0);
+ new_type_str = type_to_string (new_type);
+ curr_type_str = varobj_get_type (var);
+ if (strcmp (curr_type_str, new_type_str) != 0)
+ {
+ var->type = new_type;
+
+ /* This information may be not valid for a new type. */
+ varobj_delete (var, NULL, 1);
+ VEC_free (varobj_p, var->children);
+ var->num_children = -1;
+ return 1;
+ }
+ }
+ }
+
+ return 0;
+}
+
/* Assign a new value to a variable object. If INITIAL is non-zero,
this is the first assignement after the variable object was just
created, or changed type. In that case, just assign the value
/* If the type has custom visualizer, we consider it to be always
changeable. FIXME: need to make sure this behaviour will not
mess up read-sensitive values. */
- if (var->pretty_printer)
+ if (var->dynamic->pretty_printer != NULL)
changeable = 1;
need_to_fetch = changeable;
explicitly asked to compare the new value with the old one. */
intentionally_not_fetched = 1;
}
- else if (!gdb_value_fetch_lazy (value))
+ else
{
- /* Set the value to NULL, so that for the next -var-update,
- we don't try to compare the new value with this value,
- that we couldn't even read. */
- value = NULL;
+ volatile struct gdb_exception except;
+
+ TRY_CATCH (except, RETURN_MASK_ERROR)
+ {
+ value_fetch_lazy (value);
+ }
+
+ if (except.reason < 0)
+ {
+ /* Set the value to NULL, so that for the next -var-update,
+ we don't try to compare the new value with this value,
+ that we couldn't even read. */
+ value = NULL;
+ }
}
}
values. Don't get string rendering if the value is
lazy -- if it is, the code above has decided that the value
should not be fetched. */
- if (value && !value_lazy (value) && !var->pretty_printer)
+ if (value != NULL && !value_lazy (value)
+ && var->dynamic->pretty_printer == NULL)
print_value = value_get_print_value (value, var->format, var);
/* If the type is changeable, compare the old and the new values.
{
changed = 1;
}
- else if (! var->pretty_printer)
+ else if (var->dynamic->pretty_printer == NULL)
{
/* Try to compare the values. That requires that both
values are non-lazy. */
/* If we installed a pretty-printer, re-compare the printed version
to see if the variable changed. */
- if (var->pretty_printer)
+ if (var->dynamic->pretty_printer != NULL)
{
xfree (print_value);
print_value = value_get_print_value (var->value, var->format, var);
PyObject *mainmod, *globals, *constructor;
struct cleanup *back_to;
+ if (!gdb_python_initialized)
+ return;
+
back_to = varobj_ensure_python_env (var);
mainmod = PyImport_AddModule ("__main__");
#endif
}
+/* If NEW_VALUE is the new value of the given varobj (var), return
+ non-zero if var has mutated. In other words, if the type of
+ the new value is different from the type of the varobj's old
+ value.
+
+ NEW_VALUE may be NULL, if the varobj is now out of scope. */
+
+static int
+varobj_value_has_mutated (struct varobj *var, struct value *new_value,
+ struct type *new_type)
+{
+ /* If we haven't previously computed the number of children in var,
+ it does not matter from the front-end's perspective whether
+ the type has mutated or not. For all intents and purposes,
+ it has not mutated. */
+ if (var->num_children < 0)
+ return 0;
+
+ if (var->root->lang->value_has_mutated)
+ return var->root->lang->value_has_mutated (var, new_value, new_type);
+ else
+ return 0;
+}
+
/* Update the values for a variable and its children. This is a
two-pronged attack. First, re-parse the value for the root's
expression to see if it's changed. Then go all the way
VEC(varobj_update_result) *
varobj_update (struct varobj **varp, int explicit)
{
- int changed = 0;
int type_changed = 0;
int i;
struct value *new;
value_of_root variable dispose of the varobj if the type
has changed. */
new = value_of_root (varp, &type_changed);
+ if (update_type_if_necessary(*varp, new))
+ type_changed = 1;
r.varobj = *varp;
-
r.type_changed = type_changed;
if (install_new_value ((*varp), new, type_changed))
r.changed = 1;
/* Update this variable, unless it's a root, which is already
updated. */
if (!r.value_installed)
- {
+ {
+ struct type *new_type;
+
new = value_of_child (v->parent, v->index);
- if (install_new_value (v, new, 0 /* type not changed */))
+ if (update_type_if_necessary(v, new))
+ r.type_changed = 1;
+ if (new)
+ new_type = value_type (new);
+ else
+ new_type = v->root->lang->type_of_child (v->parent, v->index);
+
+ if (varobj_value_has_mutated (v, new, new_type))
+ {
+ /* The children are no longer valid; delete them now.
+ Report the fact that its type changed as well. */
+ varobj_delete (v, NULL, 1 /* only_children */);
+ v->num_children = -1;
+ v->to = -1;
+ v->from = -1;
+ v->type = new_type;
+ r.type_changed = 1;
+ }
+
+ if (install_new_value (v, new, r.type_changed))
{
r.changed = 1;
v->updated = 0;
/* We probably should not get children of a varobj that has a
pretty-printer, but for which -var-list-children was never
invoked. */
- if (v->pretty_printer)
+ if (v->dynamic->pretty_printer != NULL)
{
- VEC (varobj_p) *changed = 0, *new = 0, *unchanged = 0;
+ VEC (varobj_p) *changed = 0, *type_changed = 0, *unchanged = 0;
+ VEC (varobj_p) *new = 0;
int i, children_changed = 0;
if (v->frozen)
continue;
- if (!v->children_requested)
+ if (!v->dynamic->children_requested)
{
int dummy;
it. */
if (!varobj_has_more (v, 0))
{
- update_dynamic_varobj_children (v, NULL, NULL, NULL,
+ update_dynamic_varobj_children (v, NULL, NULL, NULL, NULL,
&dummy, 0, 0, 0);
if (varobj_has_more (v, 0))
r.changed = 1;
/* If update_dynamic_varobj_children returns 0, then we have
a non-conforming pretty-printer, so we skip it. */
- if (update_dynamic_varobj_children (v, &changed, &new, &unchanged,
- &children_changed, 1,
+ if (update_dynamic_varobj_children (v, &changed, &type_changed, &new,
+ &unchanged, &children_changed, 1,
v->from, v->to))
{
if (children_changed || new)
popped from the work stack first, and so will be
added to result first. This does not affect
correctness, just "nicer". */
+ for (i = VEC_length (varobj_p, type_changed) - 1; i >= 0; --i)
+ {
+ varobj_p tmp = VEC_index (varobj_p, type_changed, i);
+ varobj_update_result r = {0};
+
+ /* Type may change only if value was changed. */
+ r.varobj = tmp;
+ r.changed = 1;
+ r.type_changed = 1;
+ r.value_installed = 1;
+ VEC_safe_push (varobj_update_result, stack, &r);
+ }
for (i = VEC_length (varobj_p, changed) - 1; i >= 0; --i)
{
varobj_p tmp = VEC_index (varobj_p, changed, i);
if (r.changed || r.children_changed)
VEC_safe_push (varobj_update_result, result, &r);
- /* Free CHANGED and UNCHANGED, but not NEW, because NEW
- has been put into the result vector. */
+ /* Free CHANGED, TYPE_CHANGED and UNCHANGED, but not NEW,
+ because NEW has been put into the result vector. */
VEC_free (varobj_p, changed);
+ VEC_free (varobj_p, type_changed);
VEC_free (varobj_p, unchanged);
continue;
value_of_child (parent, index));
}
+/* Does CHILD represent a child with no name? This happens when
+ the child is an anonmous struct or union and it has no field name
+ in its parent variable.
+
+ This has already been determined by *_describe_child. The easiest
+ thing to do is to compare the child's name with ANONYMOUS_*_NAME. */
+
+static int
+is_anonymous_child (struct varobj *child)
+{
+ return (strcmp (child->name, ANONYMOUS_STRUCT_NAME) == 0
+ || strcmp (child->name, ANONYMOUS_UNION_NAME) == 0);
+}
+
static struct varobj *
-create_child_with_value (struct varobj *parent, int index, const char *name,
+create_child_with_value (struct varobj *parent, int index, char *name,
struct value *value)
{
struct varobj *child;
child = new_variable ();
- /* Name is allocated by name_of_child. */
- /* FIXME: xstrdup should not be here. */
- child->name = xstrdup (name);
+ /* NAME is allocated by caller. */
+ child->name = name;
child->index = index;
child->parent = parent;
child->root = parent->root;
- childs_name = xstrprintf ("%s.%s", parent->obj_name, name);
+
+ if (is_anonymous_child (child))
+ childs_name = xstrprintf ("%s.%d_anonymous", parent->obj_name, index);
+ else
+ childs_name = xstrprintf ("%s.%s", parent->obj_name, name);
child->obj_name = childs_name;
+
install_variable (child);
/* Compute the type of the child. Must do this before
if (value != NULL)
/* If the child had no evaluation errors, var->value
will be non-NULL and contain a valid type. */
- child->type = value_type (value);
+ child->type = value_actual_type (value, 0, NULL);
else
/* Otherwise, we must compute the type. */
child->type = (*child->root->lang->type_of_child) (child->parent,
var->print_value = NULL;
var->frozen = 0;
var->not_fetched = 0;
- var->children_requested = 0;
+ var->dynamic
+ = (struct varobj_dynamic *) xmalloc (sizeof (struct varobj_dynamic));
+ var->dynamic->children_requested = 0;
var->from = -1;
var->to = -1;
- var->constructor = 0;
- var->pretty_printer = 0;
- var->child_iter = 0;
- var->saved_item = 0;
+ var->dynamic->constructor = 0;
+ var->dynamic->pretty_printer = 0;
+ var->dynamic->child_iter = 0;
+ var->dynamic->saved_item = 0;
return var;
}
free_variable (struct varobj *var)
{
#if HAVE_PYTHON
- if (var->pretty_printer)
+ if (var->dynamic->pretty_printer != NULL)
{
struct cleanup *cleanup = varobj_ensure_python_env (var);
- Py_XDECREF (var->constructor);
- Py_XDECREF (var->pretty_printer);
- Py_XDECREF (var->child_iter);
- Py_XDECREF (var->saved_item);
+
+ Py_XDECREF (var->dynamic->constructor);
+ Py_XDECREF (var->dynamic->pretty_printer);
+ Py_XDECREF (var->dynamic->child_iter);
+ Py_XDECREF (var->dynamic->saved_item);
do_cleanups (cleanup);
}
#endif
xfree (var->obj_name);
xfree (var->print_value);
xfree (var->path_expr);
+ xfree (var->dynamic);
xfree (var);
}
return (*var->root->lang->name_of_child) (var, index);
}
+/* If frame associated with VAR can be found, switch
+ to it and return 1. Otherwise, return 0. */
+
+static int
+check_scope (struct varobj *var)
+{
+ struct frame_info *fi;
+ int scope;
+
+ fi = frame_find_by_id (var->root->frame);
+ scope = fi != NULL;
+
+ if (fi)
+ {
+ CORE_ADDR pc = get_frame_pc (fi);
+
+ if (pc < BLOCK_START (var->root->valid_block) ||
+ pc >= BLOCK_END (var->root->valid_block))
+ scope = 0;
+ else
+ select_frame (fi);
+ }
+ return scope;
+}
+
+/* Helper function to value_of_root. */
+
+static struct value *
+value_of_root_1 (struct varobj **var_handle)
+{
+ struct value *new_val = NULL;
+ struct varobj *var = *var_handle;
+ int within_scope = 0;
+ struct cleanup *back_to;
+
+ /* Only root variables can be updated... */
+ if (!is_root_p (var))
+ /* Not a root var. */
+ return NULL;
+
+ back_to = make_cleanup_restore_current_thread ();
+
+ /* Determine whether the variable is still around. */
+ if (var->root->valid_block == NULL || var->root->floating)
+ within_scope = 1;
+ else if (var->root->thread_id == 0)
+ {
+ /* The program was single-threaded when the variable object was
+ created. Technically, it's possible that the program became
+ multi-threaded since then, but we don't support such
+ scenario yet. */
+ within_scope = check_scope (var);
+ }
+ else
+ {
+ ptid_t ptid = thread_id_to_pid (var->root->thread_id);
+ if (in_thread_list (ptid))
+ {
+ switch_to_thread (ptid);
+ within_scope = check_scope (var);
+ }
+ }
+
+ if (within_scope)
+ {
+ volatile struct gdb_exception except;
+
+ /* We need to catch errors here, because if evaluate
+ expression fails we want to just return NULL. */
+ TRY_CATCH (except, RETURN_MASK_ERROR)
+ {
+ new_val = evaluate_expression (var->root->exp);
+ }
+ }
+
+ do_cleanups (back_to);
+
+ return new_val;
+}
+
/* What is the ``struct value *'' of the root variable VAR?
For floating variable object, evaluation can get us a value
of different type from what is stored in varobj already. In
*type_changed = 0;
}
- return (*var->root->lang->value_of_root) (var_handle);
+ {
+ struct value *value;
+
+ value = value_of_root_1 (var_handle);
+ if (var->value == NULL || value == NULL)
+ {
+ /* For root varobj-s, a NULL value indicates a scoping issue.
+ So, nothing to do in terms of checking for mutations. */
+ }
+ else if (varobj_value_has_mutated (var, value, value_type (value)))
+ {
+ /* The type has mutated, so the children are no longer valid.
+ Just delete them, and tell our caller that the type has
+ changed. */
+ varobj_delete (var, NULL, 1 /* only_children */);
+ var->num_children = -1;
+ var->to = -1;
+ var->from = -1;
+ *type_changed = 1;
+ }
+ return value;
+ }
}
/* What is the ``struct value *'' for the INDEX'th child of PARENT? */
{
if (var->root->is_valid)
{
- if (var->pretty_printer)
+ if (var->dynamic->pretty_printer != NULL)
return value_get_print_value (var->value, var->format, var);
return (*var->root->lang->value_of_variable) (var, format);
}
{
struct ui_file *stb;
struct cleanup *old_chain;
- gdb_byte *thevalue = NULL;
+ char *thevalue = NULL;
struct value_print_options opts;
struct type *type = NULL;
long len = 0;
gdbarch = get_type_arch (value_type (value));
#if HAVE_PYTHON
- {
- PyObject *value_formatter = var->pretty_printer;
+ if (gdb_python_initialized)
+ {
+ PyObject *value_formatter = var->dynamic->pretty_printer;
- varobj_ensure_python_env (var);
+ varobj_ensure_python_env (var);
- if (value_formatter)
- {
- /* First check to see if we have any children at all. If so,
- we simply return {...}. */
- if (dynamic_varobj_has_child_method (var))
- {
- do_cleanups (old_chain);
- return xstrdup ("{...}");
- }
+ if (value_formatter)
+ {
+ /* First check to see if we have any children at all. If so,
+ we simply return {...}. */
+ if (dynamic_varobj_has_child_method (var))
+ {
+ do_cleanups (old_chain);
+ return xstrdup ("{...}");
+ }
- if (PyObject_HasAttr (value_formatter, gdbpy_to_string_cst))
- {
- struct value *replacement;
- PyObject *output = NULL;
+ if (PyObject_HasAttr (value_formatter, gdbpy_to_string_cst))
+ {
+ struct value *replacement;
+ PyObject *output = NULL;
- output = apply_varobj_pretty_printer (value_formatter,
- &replacement,
- stb);
+ output = apply_varobj_pretty_printer (value_formatter,
+ &replacement,
+ stb);
- /* If we have string like output ... */
- if (output)
- {
- make_cleanup_py_decref (output);
-
- /* If this is a lazy string, extract it. For lazy
- strings we always print as a string, so set
- string_print. */
- if (gdbpy_is_lazy_string (output))
- {
- gdbpy_extract_lazy_string (output, &str_addr, &type,
- &len, &encoding);
- make_cleanup (free_current_contents, &encoding);
- string_print = 1;
- }
- else
- {
- /* If it is a regular (non-lazy) string, extract
- it and copy the contents into THEVALUE. If the
- hint says to print it as a string, set
- string_print. Otherwise just return the extracted
- string as a value. */
-
- PyObject *py_str
- = python_string_to_target_python_string (output);
-
- if (py_str)
- {
- char *s = PyString_AsString (py_str);
- char *hint;
-
- hint = gdbpy_get_display_hint (value_formatter);
- if (hint)
- {
- if (!strcmp (hint, "string"))
- string_print = 1;
- xfree (hint);
- }
-
- len = PyString_Size (py_str);
- thevalue = xmemdup (s, len + 1, len + 1);
- type = builtin_type (gdbarch)->builtin_char;
- Py_DECREF (py_str);
-
- if (!string_print)
- {
- do_cleanups (old_chain);
- return thevalue;
- }
-
- make_cleanup (xfree, thevalue);
- }
- else
- gdbpy_print_stack ();
- }
- }
- /* If the printer returned a replacement value, set VALUE
- to REPLACEMENT. If there is not a replacement value,
- just use the value passed to this function. */
- if (replacement)
- value = replacement;
- }
- }
- }
+ /* If we have string like output ... */
+ if (output)
+ {
+ make_cleanup_py_decref (output);
+
+ /* If this is a lazy string, extract it. For lazy
+ strings we always print as a string, so set
+ string_print. */
+ if (gdbpy_is_lazy_string (output))
+ {
+ gdbpy_extract_lazy_string (output, &str_addr, &type,
+ &len, &encoding);
+ make_cleanup (free_current_contents, &encoding);
+ string_print = 1;
+ }
+ else
+ {
+ /* If it is a regular (non-lazy) string, extract
+ it and copy the contents into THEVALUE. If the
+ hint says to print it as a string, set
+ string_print. Otherwise just return the extracted
+ string as a value. */
+
+ char *s = python_string_to_target_string (output);
+
+ if (s)
+ {
+ char *hint;
+
+ hint = gdbpy_get_display_hint (value_formatter);
+ if (hint)
+ {
+ if (!strcmp (hint, "string"))
+ string_print = 1;
+ xfree (hint);
+ }
+
+ len = strlen (s);
+ thevalue = xmemdup (s, len + 1, len + 1);
+ type = builtin_type (gdbarch)->builtin_char;
+ xfree (s);
+
+ if (!string_print)
+ {
+ do_cleanups (old_chain);
+ return thevalue;
+ }
+
+ make_cleanup (xfree, thevalue);
+ }
+ else
+ gdbpy_print_stack ();
+ }
+ }
+ /* If the printer returned a replacement value, set VALUE
+ to REPLACEMENT. If there is not a replacement value,
+ just use the value passed to this function. */
+ if (replacement)
+ value = replacement;
+ }
+ }
+ }
#endif
get_formatted_print_options (&opts, format_code[(int) format]);
/* If the THEVALUE has contents, it is a regular string. */
if (thevalue)
- LA_PRINT_STRING (stb, type, thevalue, len, encoding, 0, &opts);
+ LA_PRINT_STRING (stb, type, (gdb_byte *) thevalue, len, encoding, 0, &opts);
else if (string_print)
/* Otherwise, if string_print is set, and it is not a regular
string, it is a lazy string. */
}
}
-/* Return non-zero if changes in value of VAR
- must be detected and reported by -var-update.
- Return zero is -var-update should never report
- changes of such values. This makes sense for structures
- (since the changes in children values will be reported separately),
- or for artifical objects (like 'public' pseudo-field in C++).
+/* Call VAR's value_is_changeable_p language-specific callback. */
- Return value of 0 means that gdb need not call value_fetch_lazy
- for the value of this variable object. */
static int
varobj_value_is_changeable_p (struct varobj *var)
{
- int r;
- struct type *type;
-
- if (CPLUS_FAKE_CHILD (var))
- return 0;
-
- type = get_value_type (var);
-
- switch (TYPE_CODE (type))
- {
- case TYPE_CODE_STRUCT:
- case TYPE_CODE_UNION:
- case TYPE_CODE_ARRAY:
- r = 0;
- break;
-
- default:
- r = 1;
- }
-
- return r;
+ return var->root->lang->value_is_changeable_p (var);
}
/* Return 1 if that varobj is floating, that is is always evaluated in the
to all types and dereferencing pointers to
structures.
+ If LOOKUP_ACTUAL_TYPE is set the enclosing type of the
+ value will be fetched and if it differs from static type
+ the value will be casted to it.
+
Both TYPE and *TYPE should be non-null. VALUE
can be null if we want to only translate type.
*VALUE can be null as well -- if the parent
static void
adjust_value_for_child_access (struct value **value,
struct type **type,
- int *was_ptr)
+ int *was_ptr,
+ int lookup_actual_type)
{
gdb_assert (type && *type);
{
if (value && *value)
{
- int success = gdb_value_ind (*value, value);
+ volatile struct gdb_exception except;
+
+ TRY_CATCH (except, RETURN_MASK_ERROR)
+ {
+ *value = value_ind (*value);
+ }
- if (!success)
+ if (except.reason < 0)
*value = NULL;
}
*type = target_type;
/* The 'get_target_type' function calls check_typedef on
result, so we can immediately check type code. No
need to call check_typedef here. */
+
+ /* Access a real type of the value (if necessary and possible). */
+ if (value && *value && lookup_actual_type)
+ {
+ struct type *enclosing_type;
+ int real_type_found = 0;
+
+ enclosing_type = value_actual_type (*value, 1, &real_type_found);
+ if (real_type_found)
+ {
+ *type = enclosing_type;
+ *value = value_cast (enclosing_type, *value);
+ }
+ }
+}
+
+/* Implement the "value_is_changeable_p" varobj callback for most
+ languages. */
+
+static int
+default_value_is_changeable_p (struct varobj *var)
+{
+ int r;
+ struct type *type;
+
+ if (CPLUS_FAKE_CHILD (var))
+ return 0;
+
+ type = get_value_type (var);
+
+ switch (TYPE_CODE (type))
+ {
+ case TYPE_CODE_STRUCT:
+ case TYPE_CODE_UNION:
+ case TYPE_CODE_ARRAY:
+ r = 0;
+ break;
+
+ default:
+ r = 1;
+ }
+
+ return r;
}
/* C */
+
static int
c_number_of_children (struct varobj *var)
{
int children = 0;
struct type *target;
- adjust_value_for_child_access (NULL, &type, NULL);
+ adjust_value_for_child_access (NULL, &type, NULL, 0);
target = get_target_type (type);
switch (TYPE_CODE (type))
struct type *type = get_value_type (parent);
char *parent_expression = NULL;
int was_ptr;
+ volatile struct gdb_exception except;
if (cname)
*cname = NULL;
if (cfull_expression)
{
*cfull_expression = NULL;
- parent_expression = varobj_get_path_expr (parent);
+ parent_expression = varobj_get_path_expr (get_path_expr_parent (parent));
}
- adjust_value_for_child_access (&value, &type, &was_ptr);
+ adjust_value_for_child_access (&value, &type, &was_ptr, 0);
switch (TYPE_CODE (type))
{
{
int real_index = index + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type));
- gdb_value_subscript (value, real_index, cvalue);
+ TRY_CATCH (except, RETURN_MASK_ERROR)
+ {
+ *cvalue = value_subscript (value, real_index);
+ }
}
if (ctype)
case TYPE_CODE_STRUCT:
case TYPE_CODE_UNION:
- if (cname)
- *cname = xstrdup (TYPE_FIELD_NAME (type, index));
+ {
+ const char *field_name;
- if (cvalue && value)
- {
- /* For C, varobj index is the same as type index. */
- *cvalue = value_struct_element_index (value, index);
- }
+ /* If the type is anonymous and the field has no name,
+ set an appropriate name. */
+ field_name = TYPE_FIELD_NAME (type, index);
+ if (field_name == NULL || *field_name == '\0')
+ {
+ if (cname)
+ {
+ if (TYPE_CODE (TYPE_FIELD_TYPE (type, index))
+ == TYPE_CODE_STRUCT)
+ *cname = xstrdup (ANONYMOUS_STRUCT_NAME);
+ else
+ *cname = xstrdup (ANONYMOUS_UNION_NAME);
+ }
- if (ctype)
- *ctype = TYPE_FIELD_TYPE (type, index);
+ if (cfull_expression)
+ *cfull_expression = xstrdup ("");
+ }
+ else
+ {
+ if (cname)
+ *cname = xstrdup (field_name);
- if (cfull_expression)
- {
- char *join = was_ptr ? "->" : ".";
+ if (cfull_expression)
+ {
+ char *join = was_ptr ? "->" : ".";
- *cfull_expression = xstrprintf ("(%s)%s%s", parent_expression, join,
- TYPE_FIELD_NAME (type, index));
- }
+ *cfull_expression = xstrprintf ("(%s)%s%s", parent_expression,
+ join, field_name);
+ }
+ }
+
+ if (cvalue && value)
+ {
+ /* For C, varobj index is the same as type index. */
+ *cvalue = value_struct_element_index (value, index);
+ }
+ if (ctype)
+ *ctype = TYPE_FIELD_TYPE (type, index);
+ }
break;
case TYPE_CODE_PTR:
if (cvalue && value)
{
- int success = gdb_value_ind (value, cvalue);
+ TRY_CATCH (except, RETURN_MASK_ERROR)
+ {
+ *cvalue = value_ind (value);
+ }
- if (!success)
+ if (except.reason < 0)
*cvalue = NULL;
}
return child->path_expr;
}
-/* If frame associated with VAR can be found, switch
- to it and return 1. Otherwise, return 0. */
-static int
-check_scope (struct varobj *var)
-{
- struct frame_info *fi;
- int scope;
-
- fi = frame_find_by_id (var->root->frame);
- scope = fi != NULL;
-
- if (fi)
- {
- CORE_ADDR pc = get_frame_pc (fi);
-
- if (pc < BLOCK_START (var->root->valid_block) ||
- pc >= BLOCK_END (var->root->valid_block))
- scope = 0;
- else
- select_frame (fi);
- }
- return scope;
-}
-
-static struct value *
-c_value_of_root (struct varobj **var_handle)
-{
- struct value *new_val = NULL;
- struct varobj *var = *var_handle;
- int within_scope = 0;
- struct cleanup *back_to;
-
- /* Only root variables can be updated... */
- if (!is_root_p (var))
- /* Not a root var. */
- return NULL;
-
- back_to = make_cleanup_restore_current_thread ();
-
- /* Determine whether the variable is still around. */
- if (var->root->valid_block == NULL || var->root->floating)
- within_scope = 1;
- else if (var->root->thread_id == 0)
- {
- /* The program was single-threaded when the variable object was
- created. Technically, it's possible that the program became
- multi-threaded since then, but we don't support such
- scenario yet. */
- within_scope = check_scope (var);
- }
- else
- {
- ptid_t ptid = thread_id_to_pid (var->root->thread_id);
- if (in_thread_list (ptid))
- {
- switch_to_thread (ptid);
- within_scope = check_scope (var);
- }
- }
-
- if (within_scope)
- {
- /* We need to catch errors here, because if evaluate
- expression fails we want to just return NULL. */
- gdb_evaluate_expression (var->root->exp, &new_val);
- return new_val;
- }
-
- do_cleanups (back_to);
-
- return NULL;
-}
-
static struct value *
c_value_of_child (struct varobj *parent, int index)
{
catch that case explicitly. */
struct type *type = get_type (var);
- /* If we have a custom formatter, return whatever string it has
- produced. */
- if (var->pretty_printer && var->print_value)
- return xstrdup (var->print_value);
-
/* Strip top-level references. */
while (TYPE_CODE (type) == TYPE_CODE_REF)
type = check_typedef (TYPE_TARGET_TYPE (type));
static int
cplus_number_of_children (struct varobj *var)
{
+ struct value *value = NULL;
struct type *type;
int children, dont_know;
+ int lookup_actual_type = 0;
+ struct value_print_options opts;
dont_know = 1;
children = 0;
+ get_user_print_options (&opts);
+
if (!CPLUS_FAKE_CHILD (var))
{
type = get_value_type (var);
- adjust_value_for_child_access (NULL, &type, NULL);
+
+ /* It is necessary to access a real type (via RTTI). */
+ if (opts.objectprint)
+ {
+ value = var->value;
+ lookup_actual_type = (TYPE_CODE (var->type) == TYPE_CODE_REF
+ || TYPE_CODE (var->type) == TYPE_CODE_PTR);
+ }
+ adjust_value_for_child_access (&value, &type, NULL, lookup_actual_type);
if (((TYPE_CODE (type)) == TYPE_CODE_STRUCT) ||
((TYPE_CODE (type)) == TYPE_CODE_UNION))
int kids[3];
type = get_value_type (var->parent);
- adjust_value_for_child_access (NULL, &type, NULL);
+
+ /* It is necessary to access a real type (via RTTI). */
+ if (opts.objectprint)
+ {
+ struct varobj *parent = var->parent;
+
+ value = parent->value;
+ lookup_actual_type = (TYPE_CODE (parent->type) == TYPE_CODE_REF
+ || TYPE_CODE (parent->type) == TYPE_CODE_PTR);
+ }
+ adjust_value_for_child_access (&value, &type, NULL, lookup_actual_type);
cplus_class_num_children (type, kids);
if (strcmp (var->name, "public") == 0)
struct value *value;
struct type *type;
int was_ptr;
+ int lookup_actual_type = 0;
char *parent_expression = NULL;
+ struct varobj *var;
+ struct value_print_options opts;
if (cname)
*cname = NULL;
if (cfull_expression)
*cfull_expression = NULL;
- if (CPLUS_FAKE_CHILD (parent))
- {
- value = parent->parent->value;
- type = get_value_type (parent->parent);
- if (cfull_expression)
- parent_expression = varobj_get_path_expr (parent->parent);
- }
- else
- {
- value = parent->value;
- type = get_value_type (parent);
- if (cfull_expression)
- parent_expression = varobj_get_path_expr (parent);
- }
+ get_user_print_options (&opts);
- adjust_value_for_child_access (&value, &type, &was_ptr);
+ var = (CPLUS_FAKE_CHILD (parent)) ? parent->parent : parent;
+ if (opts.objectprint)
+ lookup_actual_type = (TYPE_CODE (var->type) == TYPE_CODE_REF
+ || TYPE_CODE (var->type) == TYPE_CODE_PTR);
+ value = var->value;
+ type = get_value_type (var);
+ if (cfull_expression)
+ parent_expression = varobj_get_path_expr (get_path_expr_parent (var));
+
+ adjust_value_for_child_access (&value, &type, &was_ptr, lookup_actual_type);
if (TYPE_CODE (type) == TYPE_CODE_STRUCT
|| TYPE_CODE (type) == TYPE_CODE_UNION)
enum accessibility acc = public_field;
int vptr_fieldno;
struct type *basetype = NULL;
+ const char *field_name;
vptr_fieldno = get_vptr_fieldno (type, &basetype);
if (strcmp (parent->name, "private") == 0)
}
--type_index;
- if (cname)
- *cname = xstrdup (TYPE_FIELD_NAME (type, type_index));
+ /* If the type is anonymous and the field has no name,
+ set an appopriate name. */
+ field_name = TYPE_FIELD_NAME (type, type_index);
+ if (field_name == NULL || *field_name == '\0')
+ {
+ if (cname)
+ {
+ if (TYPE_CODE (TYPE_FIELD_TYPE (type, type_index))
+ == TYPE_CODE_STRUCT)
+ *cname = xstrdup (ANONYMOUS_STRUCT_NAME);
+ else if (TYPE_CODE (TYPE_FIELD_TYPE (type, type_index))
+ == TYPE_CODE_UNION)
+ *cname = xstrdup (ANONYMOUS_UNION_NAME);
+ }
+
+ if (cfull_expression)
+ *cfull_expression = xstrdup ("");
+ }
+ else
+ {
+ if (cname)
+ *cname = xstrdup (TYPE_FIELD_NAME (type, type_index));
+
+ if (cfull_expression)
+ *cfull_expression
+ = xstrprintf ("((%s)%s%s)", parent_expression, join,
+ field_name);
+ }
if (cvalue && value)
*cvalue = value_struct_element_index (value, type_index);
if (ctype)
*ctype = TYPE_FIELD_TYPE (type, type_index);
-
- if (cfull_expression)
- *cfull_expression
- = xstrprintf ("((%s)%s%s)", parent_expression,
- join,
- TYPE_FIELD_NAME (type, type_index));
}
else if (index < TYPE_N_BASECLASSES (type))
{
return child->path_expr;
}
-static struct value *
-cplus_value_of_root (struct varobj **var_handle)
-{
- return c_value_of_root (var_handle);
-}
-
static struct value *
cplus_value_of_child (struct varobj *parent, int index)
{
return NULL;
}
-static struct value *
-java_value_of_root (struct varobj **var_handle)
-{
- return cplus_value_of_root (var_handle);
-}
-
static struct value *
java_value_of_child (struct varobj *parent, int index)
{
static int
ada_number_of_children (struct varobj *var)
{
- return c_number_of_children (var);
+ return ada_varobj_get_number_of_children (var->value, var->type);
}
static char *
static char *
ada_name_of_child (struct varobj *parent, int index)
{
- return c_name_of_child (parent, index);
+ return ada_varobj_get_name_of_child (parent->value, parent->type,
+ parent->name, index);
}
static char*
ada_path_expr_of_child (struct varobj *child)
{
- return c_path_expr_of_child (child);
-}
-
-static struct value *
-ada_value_of_root (struct varobj **var_handle)
-{
- return c_value_of_root (var_handle);
+ struct varobj *parent = child->parent;
+ const char *parent_path_expr = varobj_get_path_expr (parent);
+
+ return ada_varobj_get_path_expr_of_child (parent->value,
+ parent->type,
+ parent->name,
+ parent_path_expr,
+ child->index);
}
static struct value *
ada_value_of_child (struct varobj *parent, int index)
{
- return c_value_of_child (parent, index);
+ return ada_varobj_get_value_of_child (parent->value, parent->type,
+ parent->name, index);
}
static struct type *
ada_type_of_child (struct varobj *parent, int index)
{
- return c_type_of_child (parent, index);
+ return ada_varobj_get_type_of_child (parent->value, parent->type,
+ index);
}
static char *
ada_value_of_variable (struct varobj *var, enum varobj_display_formats format)
{
- return c_value_of_variable (var, format);
+ struct value_print_options opts;
+
+ get_formatted_print_options (&opts, format_code[(int) format]);
+ opts.deref_ref = 0;
+ opts.raw = 1;
+
+ return ada_varobj_get_value_of_variable (var->value, var->type, &opts);
+}
+
+/* Implement the "value_is_changeable_p" routine for Ada. */
+
+static int
+ada_value_is_changeable_p (struct varobj *var)
+{
+ struct type *type = var->value ? value_type (var->value) : var->type;
+
+ if (ada_is_array_descriptor_type (type)
+ && TYPE_CODE (type) == TYPE_CODE_TYPEDEF)
+ {
+ /* This is in reality a pointer to an unconstrained array.
+ its value is changeable. */
+ return 1;
+ }
+
+ if (ada_is_string_type (type))
+ {
+ /* We display the contents of the string in the array's
+ "value" field. The contents can change, so consider
+ that the array is changeable. */
+ return 1;
+ }
+
+ return default_value_is_changeable_p (var);
+}
+
+/* Implement the "value_has_mutated" routine for Ada. */
+
+static int
+ada_value_has_mutated (struct varobj *var, struct value *new_val,
+ struct type *new_type)
+{
+ int i;
+ int from = -1;
+ int to = -1;
+
+ /* If the number of fields have changed, then for sure the type
+ has mutated. */
+ if (ada_varobj_get_number_of_children (new_val, new_type)
+ != var->num_children)
+ return 1;
+
+ /* If the number of fields have remained the same, then we need
+ to check the name of each field. If they remain the same,
+ then chances are the type hasn't mutated. This is technically
+ an incomplete test, as the child's type might have changed
+ despite the fact that the name remains the same. But we'll
+ handle this situation by saying that the child has mutated,
+ not this value.
+
+ If only part (or none!) of the children have been fetched,
+ then only check the ones we fetched. It does not matter
+ to the frontend whether a child that it has not fetched yet
+ has mutated or not. So just assume it hasn't. */
+
+ restrict_range (var->children, &from, &to);
+ for (i = from; i < to; i++)
+ if (strcmp (ada_varobj_get_name_of_child (new_val, new_type,
+ var->name, i),
+ VEC_index (varobj_p, var->children, i)->name) != 0)
+ return 1;
+
+ return 0;
}
/* Iterate all the existing _root_ VAROBJs and call the FUNC callback for them
varobj_table = xmalloc (sizeof_table);
memset (varobj_table, 0, sizeof_table);
- 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);
+ add_setshow_zuinteger_cmd ("debugvarobj", class_maintenance,
+ &varobjdebug,
+ _("Set varobj debugging."),
+ _("Show varobj debugging."),
+ _("When non-zero, varobj debugging is enabled."),
+ NULL, show_varobjdebug,
+ &setlist, &showlist);
}
/* Invalidate varobj VAR if it is tied to locals and re-create it if it is
- defined on globals. It is a helper for varobj_invalidate. */
+ defined on globals. It is a helper for varobj_invalidate.
+
+ This function is called after changing the symbol file, in this case the
+ pointers to "struct type" stored by the varobj are no longer valid. All
+ varobj must be either re-evaluated, or marked as invalid here. */
static void
varobj_invalidate_iter (struct varobj *var, void *unused)
{
- /* Floating varobjs are reparsed on each stop, so we don't care if the
- presently parsed expression refers to something that's gone. */
- if (var->root->floating)
- return;
-
- /* global var must be re-evaluated. */
- if (var->root->valid_block == NULL)
+ /* global and floating var must be re-evaluated. */
+ if (var->root->floating || var->root->valid_block == NULL)
{
struct varobj *tmp_var;
projects / deliverable / binutils-gdb.git / blobdiff