Re: [patch 2/2] New 'explore' command Python implementation (with docs)

Siva Chandra
2012-03-21T12:35:16Z

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Hello,

I was hoping to submit the other patch on Value.referenced_value
before sending this one over. Since I could not yet submit (though
approved), I am sending over the 'explore' command patch with
suggested changes.

Thanks to Eli for reviewing. I have modified according to your
suggestions. However, since there is a lot of new material, it will
require another close review.

Docs ChangeLog:

2012-03-21 Siva Chandra <sivachandra@google.com>

* gdb.texinfo (Examining Data): Document the 'explore' command.

Code ChangeLog:

2012-03-21 Siva Chandra <sivachandra@google.com>

New command 'explore' which helps explore values and types in
scope.
* NEWS: Add an entry about the new 'explore' command.
* data-directory/Makefile.in: Add gdb/command/explore.py
* python/lib/gdb/command/explore.py: Implemention of the 'explore'
command using the GDB Python API.

Testsuite ChangeLog:

2012-03-21 Siva Chandra <sivachandra@google.com>

* gdb.python/Makefile.in: Add py-explore to EXECUTABLES
* gdb.python/py-explore.c: C program used for testing the new
'explore' command.
* gdb-python/py-explore.exp: Tests for the new 'explore'
command.

Thanks,
Siva Chandra

On Fri, Mar 9, 2012 at 2:26 PM, Eli Zaretskii <eliz@gnu.org> wrote:
>> Date: Wed, 7 Mar 2012 16:58:29 +0530
>> From: Siva Chandra <sivachandra@google.com>
>>
>> +Another way of examining values of expressions and type information is
>> +through the Python extension (hence only available if GDB build is
>
> @value{GDBN} instead of a literal "GDB".
>
> The rest of the documentation text is identical to what I already
> reviewed.
>
> Thanks.

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diff -rupN src/gdb/data-directory/Makefile.in src_explore_python/gdb/data-directory/Makefile.in
--- src/gdb/data-directory/Makefile.in 2012-01-04 13:47:19.000000000 +0530
+++ src_explore_python/gdb/data-directory/Makefile.in 2012-02-19 17:59:54.281806521 +0530
@@ -58,7 +58,8 @@ PYTHON_FILES = \
gdb/prompt.py \
gdb/command/__init__.py \
gdb/command/pretty_printers.py \
- gdb/command/prompt.py
+ gdb/command/prompt.py \
+ gdb/command/explore.py

FLAGS_TO_PASS = \
"prefix=$(prefix)" \
diff -rupN src/gdb/doc/gdb.texinfo src_explore_python/gdb/doc/gdb.texinfo
--- src/gdb/doc/gdb.texinfo 2012-02-10 06:54:58.000000000 +0530
+++ src_explore_python/gdb/doc/gdb.texinfo 2012-03-21 16:21:39.289254155 +0530
@@ -7093,6 +7093,153 @@ fields of a struct or a class are declar
command rather than @code{print}. @xref{Symbols, ,Examining the Symbol
Table}.

+@cindex exploring hierarchical data structures
+@kindex explore
+Another way of examining values of expressions and type information is
+through the Python extension command @code{explore} (available only if
+the @value{GDBN} build is configured with @code{--with-python}). It
+offers an interactive way to start at the highest level (or, the most
+abstract level) of the data type of an expression (or, the data type
+itself) and explore all the way down to leaf scalar values/fields
+embedded in the higher level data types.
+
+@table @code
+@item explore @var{arg}
+@var{arg} is either an expression (in the source language), or a type
+visible in the current context of the program being debugged.
+@end table
+
+The working of the @code{explore} command can be illustrated with an
+example. If a data type @code{struct ComplexStruct} is defined in your
+C program as
+
+@smallexample
+struct SimpleStruct
+@{
+ int i;
+ double d;
+@};
+
+struct ComplexStruct
+@{
+ struct SimpleStruct *ss_p;
+ int arr[10];
+@};
+@end smallexample
+
+@noindent
+followed by variable declarations as
+
+@smallexample
+struct SimpleStruct ss = @{ 10, 1.11 @};
+struct ComplexStruct cs = @{ &ss, @{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 @} @};
+@end smallexample
+
+@noindent
+then, the value of the variable @code{cs} can be explored using the
+@code{explore} command as follows.
+
+@smallexample
+(gdb) explore cs
+The value of `cs' is a struct/class of type `struct ComplexStruct' with
+the following fields:
+
+ ss_p = <Enter 0 to explore this field of type `struct SimpleStruct *'>
+ arr = <Enter 1 to explore this field of type `int [10]'>
+
+Enter the field number of choice:
+@end smallexample
+
+@noindent
+Since the fields of @code{cs} are not scalar values, you are being
+prompted to chose the field you want to explore. Lets say you choose
+the field @code{ss_p} by entering @code{0}. Then, since this field is a
+pointer, you will be asked if it is pointing to a single value. From
+the declaration of @code{cs} above, it is indeed pointing to a single
+value, hence you enter @code{y}. If you enter @code{n}, then you will
+be asked if it were pointing to an array of values, in which case this
+field will be explored as if it were an array.
+
+@smallexample
+`cs.ss_p' is a pointer to a value of type `struct SimpleStruct'
+Continue exploring it as a pointer to a single value [y/n]: y
+The value of `*(cs.ss_p)' is a struct/class of type `struct
+SimpleStruct' with the following fields:
+
+ i = 10 .. (Value of type `int')
+ d = 1.1100000000000001 .. (Value of type `double')
+
+Press enter to return to parent value:
+@end smallexample
+
+@noindent
+If the field @code{arr} of @code{cs} was chosen for exploration by
+entering @code{1} earlier, then since it is as array, you will be
+prompted to enter the index of the element in the array that you want
+to explore.
+
+@smallexample
+`cs.arr' is an array of `int'.
+Enter the index of the element you want to explore in `cs.arr': 5
+
+`(cs.arr)[5]' is a scalar value of type `int'.
+
+(cs.arr)[5] = 4
+
+Press enter to return to parent value:
+@end smallexample
+
+In general, at any stage of exploration, you can go deeper towards the
+leaf values by responding to the prompts appropriately, or hit the
+return key to return to the enclosing data structure (the @i{higher}
+level data structure).
+
+Similar to exploring values, you can use the @code{explore} command to
+explore types. Instead of specifying a value (which is typically a
+variable name or an expression valid in the current context of the
+program being debugged), you specify a type name. If you consider the
+same example as above, your can explore the type
+@code{struct ComplexStruct} by passing the argument
+@code{struct ComplexStruct} to the @code{explore} command.
+
+@smallexample
+(gdb) explore struct ComplexStruct
+@end smallexample
+
+@noindent
+By responding to the prompts appropriately in the subsequent interactive
+session, you can explore the type @code{struct ComplexStruct} in a
+manner similar to how the value @code{cs} was explored in the above
+example.
+
+The @code{explore} command also has two sub-commands,
+@code{explore value} and @code{explore type}. The former sub-command is
+a way to explicitly specify that value exploration of the argument is
+being invoked, while the latter is a way to explicitly specify that type
+exploration of the argument is being invoked.
+
+@table @code
+@item explore value @var{expr}
+@cindex explore value
+This sub-command of @code{explore} explores the value of the
+expression @var{expr} (if @var{expr} is an expression valid in the
+current context of the program being debugged). The behavior of this
+command is identical to that of the behavior of the @code{explore}
+command being passed the argument @var{expr}.
+
+@item explore type @var{arg}
+@cindex explore type
+This sub-command of @code{explore} explores the type of @var{arg} (if
+@var{arg} is a type visible in the current context of program being
+debugged), or the type of the value/expression @var{arg} (if @var{arg}
+is an expression valid in the current context of the program being
+debugged). If @var{arg} is a type, then the behavior of this command is
+identical to that of the @code{explore} command being passed the
+argument @var{arg}. If @var{arg} is an expression, then the behavior of
+this command will be identical to that of the @code{explore} command
+being passed the type of @var{arg} as the argument.
+@end table
+
@menu
* Expressions:: Expressions
* Ambiguous Expressions:: Ambiguous Expressions
diff -rupN src/gdb/NEWS src_explore_python/gdb/NEWS
--- src/gdb/NEWS 2012-03-05 16:55:36.652342189 +0530
+++ src_explore_python/gdb/NEWS 2012-03-21 17:26:15.485697544 +0530
@@ -49,6 +49,11 @@
** "catch load" and "catch unload" can be used to stop when a shared
library is loaded or unloaded, respectively.

+ ** "explore" and its sub commands "explore value" and "explore type"
+ can be used to recurrsively explore values and types of
+ expressions. These commands are available only if GDB is
+ configured with '--with-python'.
+
*** Changes in GDB 7.4

* GDB now handles ambiguous linespecs more consistently; the existing
diff -rupN src/gdb/python/lib/gdb/command/explore.py src_explore_python/gdb/python/lib/gdb/command/explore.py
--- src/gdb/python/lib/gdb/command/explore.py 1970-01-01 05:30:00.000000000 +0530
+++ src_explore_python/gdb/python/lib/gdb/command/explore.py 2012-03-21 11:16:41.938146046 +0530
@@ -0,0 +1,694 @@
+# GDB 'explore' command.
+# Copyright (C) 2012 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/>.
+
+"""Implementation of the GDB 'explore' command using the GDB Python API."""
+
+import gdb
+
+class Explorer(object):
+ """Internal class which invokes other explorers."""
+
+ # This map is filled by the Explorer.init_env() function
+ type_code_to_explorer_map = { }
+
+ _SCALAR_TYPE_LIST = (
+ gdb.TYPE_CODE_CHAR,
+ gdb.TYPE_CODE_INT,
+ gdb.TYPE_CODE_BOOL,
+ gdb.TYPE_CODE_FLT,
+ gdb.TYPE_CODE_VOID,
+ gdb.TYPE_CODE_ENUM,
+ )
+
+ @staticmethod
+ def guard_expr(expr):
+ length = len(expr)
+ guard = False
+
+ if expr[0] == '(' and expr[length-1] == ')':
+ pass
+ else:
+ i = 0
+ while i < length:
+ c = expr[i]
+ if (c == '_' or ('a' <= c and c <= 'z') or
+ ('A' <= c and c <= 'Z') or ('0' <= c and c <= '9')):
+ pass
+ else:
+ guard = True
+ break
+ i += 1
+
+ if guard:
+ return "(" + expr + ")"
+ else:
+ return expr
+
+ @staticmethod
+ def explore_expr(expr, value, is_child):
+ """Main function to explore an expression value.
+
+ Arguments:
+ expr: The expression string that is being explored.
+ value: The gdb.Value value of the expression.
+ is_child: Boolean value to indicate if the expression is a child.
+ An expression is a child if it is derived from the main
+ expression entered by the user. For example, if the user
+ entered an expression which evaluates to a struct, then
+ when exploring the fields of the struct, is_child is set
+ to True internally.
+
+ Returns:
+ No return value.
+ """
+ type_code = value.type.code
+ if type_code in Explorer.type_code_to_explorer_map:
+ explorer_class = Explorer.type_code_to_explorer_map[type_code]
+ while explorer_class.explore_expr(expr, value, is_child):
+ pass
+ else:
+ print ("Explorer for type '%s' not yet available.\n" %
+ str(value.type))
+
+ @staticmethod
+ def explore_type(name, datatype, is_child):
+ """Main function to explore a data type.
+
+ Arguments:
+ name: The string representing the path to the data type being
+ explored.
+ datatype: The gdb.Type value of the data type being explored.
+ is_child: Boolean value to indicate if the name is a child.
+ A name is a child if it is derived from the main name
+ entered by the user. For example, if the user entered the
+ name of struct type, then when exploring the fields of
+ the struct, is_child is set to True internally.
+
+ Returns:
+ No return value.
+ """
+ type_code = datatype.code
+ if type_code in Explorer.type_code_to_explorer_map:
+ explorer_class = Explorer.type_code_to_explorer_map[type_code]
+ while explorer_class.explore_type(name, datatype, is_child):
+ pass
+ else:
+ print ("Explorer for type '%s' not yet available.\n" %
+ str(datatype))
+
+ @staticmethod
+ def init_env():
+ """Initializes the Explorer environment.
+ This function should be invoked before starting any exploration. If
+ invoked before an exploration, it need not be invoked for subsequent
+ explorations.
+ """
+ Explorer.type_code_to_explorer_map = {
+ gdb.TYPE_CODE_CHAR : ScalarExplorer,
+ gdb.TYPE_CODE_INT : ScalarExplorer,
+ gdb.TYPE_CODE_BOOL : ScalarExplorer,
+ gdb.TYPE_CODE_FLT : ScalarExplorer,
+ gdb.TYPE_CODE_VOID : ScalarExplorer,
+ gdb.TYPE_CODE_ENUM : ScalarExplorer,
+ gdb.TYPE_CODE_STRUCT : CompoundExplorer,
+ gdb.TYPE_CODE_UNION : CompoundExplorer,
+ gdb.TYPE_CODE_PTR : PointerExplorer,
+ gdb.TYPE_CODE_TYPEDEF : TypedefExplorer,
+ gdb.TYPE_CODE_ARRAY : ArrayExplorer
+ }
+
+ @staticmethod
+ def is_scalar_type(type):
+ """Checks whether a type is a scalar type.
+ A type is a scalar type of its type is
+ gdb.TYPE_CODE_CHAR or
+ gdb.TYPE_CODE_INT or
+ gdb.TYPE_CODE_BOOL or
+ gdb.TYPE_CODE_FLT or
+ gdb.TYPE_CODE_VOID or
+ gdb.TYPE_CODE_ENUM.
+
+ Arguments:
+ type: The type to be checked.
+
+ Returns:
+ 'True' if 'type' is a scalar type. 'False' otherwise.
+ """
+ return type.code in Explorer._SCALAR_TYPE_LIST
+
+ @staticmethod
+ def return_to_parent_value():
+ """A utility function which prints that the current exploration session
+ is returning to the parent value. Useful when exploring values.
+ """
+ print "\nReturning to parent value...\n"
+
+ @staticmethod
+ def return_to_parent_value_prompt():
+ """A utility function which prompts the user to press the 'enter' key
+ so that the exploration session can shift back to the parent value.
+ Useful when exploring values.
+ """
+ raw_input("\nPress enter to return to parent value: ")
+
+ @staticmethod
+ def return_to_enclosing_type():
+ """A utility function which prints that the current exploration session
+ is returning to the enclosing type. Useful when exploring types.
+ """
+ print "\nReturning to enclosing type...\n"
+
+ @staticmethod
+ def return_to_enclosing_type_prompt():
+ """A utility function which prompts the user to press the 'enter' key
+ so that the exploration session can shift back to the enclosing type.
+ Useful when exploring types.
+ """
+ raw_input("\nPress enter to return to enclosing type: ")
+
+
+class ScalarExplorer(object):
+ """Internal class used to explore scalar values."""
+
+ @staticmethod
+ def explore_expr(expr, value, is_child):
+ """Function to explore scalar values.
+ See Explorer.explore_expr and Explorer.is_scalar_type for more
+ information.
+ """
+ print ("'%s' is a scalar value of type '%s'.\n" %
+ (expr, value.type))
+ print "%s = %s" % (expr, str(value))
+
+ if is_child:
+ Explorer.return_to_parent_value_prompt()
+ Explorer.return_to_parent_value()
+
+ return False
+
+ @staticmethod
+ def explore_type(name, datatype, is_child):
+ """Function to explore scalar types.
+ See Explorer.explore_type and Explorer.is_scalar_type for more
+ information.
+ """
+ if datatype.code == gdb.TYPE_CODE_ENUM:
+ if is_child:
+ print ("%s is of an enumerated type '%s'." %
+ (name, str(datatype)))
+ else:
+ print "'%s' is an enumerated type." % name
+ else:
+ if is_child:
+ print ("%s is of a scalar type '%s'." %
+ (name, str(datatype)))
+ else:
+ print "'%s' is a scalar type." % name
+
+ if is_child:
+ Explorer.return_to_enclosing_type_prompt()
+ Explorer.return_to_enclosing_type()
+
+ return False
+
+
+class PointerExplorer(object):
+ """Internal class used to explore pointer values."""
+
+ @staticmethod
+ def explore_expr(expr, value, is_child):
+ """Function to explore pointer values.
+ See Explorer.explore_expr for more information.
+ """
+ print ("\n'%s' is a pointer to a value of type '%s'" %
+ (expr, str(value.type.target())))
+ option = raw_input("Continue exploring it as a pointer to a single "
+ "value [y/n]: ")
+ if option == "y":
+ deref_value = None
+ try:
+ deref_value = value.dereference()
+ str(deref_value)
+ except gdb.MemoryError:
+ print ("'%s' a pointer pointing to an invalid memory "
+ "location." % expr)
+ if is_child:
+ Explorer.return_to_parent_value_prompt()
+ return False
+ Explorer.explore_expr("*%s" % Explorer.guard_expr(expr),
+ deref_value, is_child)
+ return False
+
+ option = raw_input("Continue exploring it as a pointer to an "
+ "array [y/n]: ")
+ if option == "y":
+ while True:
+ index = 0
+ try:
+ index = int(raw_input("Enter the index of the element you "
+ "want to explore in '%s': " % expr))
+ except ValueError:
+ break
+ element_expr = "%s[%d]" % (Explorer.guard_expr(expr), index)
+ element = value[index]
+ try:
+ str(element)
+ except gdb.MemoryError:
+ print "Cannot read value at index %d." % index
+ continue
+ Explorer.explore_expr(element_expr, element, True)
+ return False
+
+ if is_child:
+ Explorer.return_to_parent_value()
+ return False
+
+ @staticmethod
+ def explore_type(name, datatype, is_child):
+ """Function to explore pointer types.
+ See Explorer.explore_type for more information.
+ """
+ target_type = datatype.target()
+ print ("\n%s is a pointer to a value of type '%s'." %
+ (name, str(target_type)))
+
+ Explorer.explore_type("the pointee type of %s" % name,
+ target_type,
+ is_child)
+ return False
+
+
+class ArrayExplorer(object):
+ """Internal class used to explore arrays."""
+
+ @staticmethod
+ def explore_expr(expr, value, is_child):
+ """Function to explore array values.
+ See Explorer.explore_expr for more information.
+ """
+ target_type = value.type.target()
+ print ("'%s' is an array of '%s'." % (expr, str(target_type)))
+ index = 0
+ try:
+ index = int(raw_input("Enter the index of the element you want to "
+ "explore in '%s': " % expr))
+ except ValueError:
+ if is_child:
+ Explorer.return_to_parent_value()
+ return False
+
+ element = None
+ try:
+ element = value[index]
+ str(element)
+ except gdb.MemoryError:
+ print "Cannot read value at index %d." % index
+ raw_input("Press enter to continue... ")
+ return True
+
+ Explorer.explore_expr("%s[%d]" % (Explorer.guard_expr(expr), index),
+ element, True)
+ return True
+
+ @staticmethod
+ def explore_type(name, datatype, is_child):
+ """Function to explore array types.
+ See Explorer.explore_type for more information.
+ """
+ target_type = datatype.target()
+ print "%s is an array of '%s'." % (name, str(target_type))
+
+ Explorer.explore_type("the array element of %s" % name, target_type,
+ is_child)
+ return False
+
+
+class CompoundExplorer(object):
+ """Internal class used to explore struct, classes and unions."""
+
+ @staticmethod
+ def _print_fields(print_list):
+ """Internal function which prints the fields of a struct/class/union.
+ """
+ max_field_name_length = 0
+ for pair in print_list:
+ if max_field_name_length < len(pair[0]):
+ max_field_name_length = len(pair[0])
+
+ format_str = " {0:>%d} = {1}" % max_field_name_length
+ for pair in print_list:
+ print format_str.format(pair[0], pair[1])
+
+ @staticmethod
+ def explore_expr(expr, value, is_child):
+ """Function to explore structs/classes and union values.
+ See Explorer.explore_expr for more information.
+ """
+ type_code = value.type.code
+ type_desc = ""
+ if type_code == gdb.TYPE_CODE_STRUCT:
+ type_desc = "struct/class"
+ else:
+ type_desc = "union"
+ print("The value of '%s' is a %s of type '%s' with the following "
+ "fields:\n" % (expr, type_desc, str(value.type)))
+
+ fields = value.type.fields()
+ has_explorable_fields = False
+ choice_to_compound_field_map = { }
+ current_choice = 0
+ print_list = [ ]
+ for field in fields:
+ field_full_name = Explorer.guard_expr(expr) + "." + field.name
+ field_value = value[field.name]
+ literal_value = ""
+ if type_code == gdb.TYPE_CODE_UNION:
+ literal_value = ("<Enter %d to explore this field of type "
+ "'%s'>" % (current_choice, str(field.type)))
+ has_explorable_fields = True
+ else:
+ if Explorer.is_scalar_type(field.type):
+ literal_value = ("%s .. (Value of type '%s')" %
+ (str(field_value), str(field.type)))
+ else:
+ if field.is_base_class:
+ field_desc = "base class"
+ else:
+ field_desc = "field"
+ literal_value = ("<Enter %d to explore this %s of type "
+ "'%s'>" %
+ (current_choice, field_desc,
+ str(field.type)))
+ has_explorable_fields = True
+
+ choice_to_compound_field_map[str(current_choice)] = (
+ field_full_name, field_value)
+ current_choice = current_choice + 1
+
+ print_list.append((field.name, literal_value))
+
+ CompoundExplorer._print_fields(print_list)
+ print ""
+
+ if has_explorable_fields:
+ choice = raw_input("Enter the field number of choice: ")
+ if choice in choice_to_compound_field_map:
+ Explorer.explore_expr(choice_to_compound_field_map[choice][0],
+ choice_to_compound_field_map[choice][1],
+ True)
+ return True
+ else:
+ if is_child:
+ Explorer.returning_to_parent_value_message()
+ else:
+ if is_child:
+ Explorer.return_to_parent_value_prompt()
+
+ return False
+
+ @staticmethod
+ def explore_type(name, datatype, is_child):
+ """Function to explore struct/class and union types.
+ See Explorer.explore_type for more information.
+ """
+ type_code = datatype.code
+ type_desc = ""
+ if type_code == gdb.TYPE_CODE_STRUCT:
+ type_desc = "struct/class"
+ else:
+ type_desc = "union"
+
+ if is_child:
+ print ("\n%s is a %s of type '%s' "
+ "with the following fields:\n" %
+ (name, type_desc, str(datatype)))
+ else:
+ print ("\n'%s' is a %s with the following "
+ "fields:\n" %
+ (name, type_desc))
+
+ fields = datatype.fields()
+ has_explorable_fields = False
+ current_choice = 0
+ choice_to_compound_field_map = { }
+ print_list = [ ]
+ for field in fields:
+ rhs = ("<Enter %d to explore this field of type '%s'>" %
+ (current_choice, str(field.type)))
+ print_list.append((field.name, rhs))
+ choice_to_compound_field_map[str(current_choice)] = (
+ field.name, field.type)
+ current_choice = current_choice + 1
+
+ CompoundExplorer._print_fields(print_list)
+ print ""
+
+ if len(choice_to_compound_field_map) > 0:
+ choice = raw_input("Enter the field number of choice : ")
+ if choice in choice_to_compound_field_map:
+ if is_child:
+ Explorer.explore_type(
+ ("field '%s' of %s" %
+ (choice_to_compound_field_map[choice][0], name)),
+ choice_to_compound_field_map[choice][1],
+ True)
+ else:
+ Explorer.explore_type(
+ ("field '%s' of '%s'" %
+ (choice_to_compound_field_map[choice][0], name)),
+ choice_to_compound_field_map[choice][1],
+ True)
+ return True
+ else:
+ if is_child:
+ Explorer.return_to_enclosing_type()
+ else:
+ if is_child:
+ Explorer.return_to_enclosing_type_prompt()
+
+ return False
+
+
+class TypedefExplorer(object):
+ """Internal class used to explore values whose type is a typedef."""
+
+ @staticmethod
+ def explore_expr(expr, value, is_child):
+ """Function to explore typedef values.
+ See Explorer.explore_expr for more information.
+ """
+ actual_type = value.type.strip_typedefs()
+ print ("\nThe value of '%s' is of type '%s' "
+ "which is a typedef of type '%s'" %
+ (expr, str(value.type), str(actual_type)))
+
+ Explorer.explore_expr(expr, value.cast(actual_type), is_child)
+ return False
+
+ @staticmethod
+ def explore_type(name, datatype, is_child):
+ """Function to explore typedef types.
+ See Explorer.explore_type for more information.
+ """
+ actual_type = datatype.strip_typedefs()
+ if is_child:
+ print("\nThe type of %s is a typedef of type '%s'." %
+ (name, str(actual_type)))
+ else:
+ print("\nThe type '%s' is a typedef of type '%s'." %
+ (name, str(actual_type)))
+
+ Explorer.explore_type(name, actual_type, is_child)
+ return False
+
+
+class ExploreUtils(object):
+ """Internal class which provides utilities for the main command classes."""
+
+ @staticmethod
+ def check_args(name, arg_str):
+ """Utility to check if adequate number of arguments are passed to an
+ explore command.
+
+ Arguments:
+ name: The name of the explore command.
+ arg_str: The argument string passed to the explore command.
+
+ Returns:
+ True if adequate arguments are passed, false otherwise.
+
+ Raises:
+ gdb.GdbError if adequate arguments are not passed.
+ """
+ if len(arg_str) < 1:
+ raise gdb.GdbError("ERROR: '%s' requires an argument."
+ % name)
+ return False
+ else:
+ return True
+
+ @staticmethod
+ def get_type_from_str(type_str):
+ """A utility function to deduce the gdb.Type value from a string
+ representing the type.
+
+ Arguments:
+ type_str: The type string from which the gdb.Type value should be
+ deduced.
+
+ Returns:
+ The deduced gdb.Type value if possible, None otherwise.
+ """
+ try:
+ # Assume the current language to be C/C++ and make a try.
+ return gdb.parse_and_eval("(%s *)0" % type_str).type.target()
+ except RuntimeError:
+ # If assumption of current language to be C/C++ was wrong, then
+ # lookup the type using the API.
+ try:
+ return gdb.lookup_type(type_str)
+ except RuntimeError:
+ return None
+
+ @staticmethod
+ def get_value_from_str(value_str):
+ """A utility function to deduce the gdb.Value value from a string
+ representing the value.
+
+ Arguments:
+ value_str: The value string from which the gdb.Value value should
+ be deduced.
+
+ Returns:
+ The deduced gdb.Value value if possible, None otherwise.
+ """
+ try:
+ return gdb.parse_and_eval(value_str)
+ except RuntimeError:
+ return None
+
+
+class ExploreCommand(gdb.Command):
+ """Explore a value or a type valid in the current context.
+
+ Usage:
+
+ explore ARG
+
+ - ARG is either a valid expression or a type name.
+ - At any stage of exploration, hit the return key (instead of a
+ choice, if any) to return to the enclosing type or value.
+ """
+
+ def __init__(self):
+ super(ExploreCommand, self).__init__(name = "explore",
+ command_class = gdb.COMMAND_DATA,
+ prefix = True)
+
+ def invoke(self, arg_str, from_tty):
+ if ExploreUtils.check_args("explore", arg_str) == False:
+ return
+
+ # Check if it is a value
+ value = ExploreUtils.get_value_from_str(arg_str)
+ if value is not None:
+ Explorer.explore_expr(arg_str, value, False)
+ return
+
+ # If it is not a value, check if it is a type
+ datatype = ExploreUtils.get_type_from_str(arg_str)
+ if datatype is not None:
+ Explorer.explore_type(arg_str, datatype, False)
+ return
+
+ # If it is neither a value nor a type, raise an error.
+ raise gdb.GdbError(
+ ("'%s' neither evaluates to a value nor is a type "
+ "in the current context." %
+ arg_str))
+
+
+class ExploreValueCommand(gdb.Command):
+ """Explore value of an expression valid in the current context.
+
+ Usage:
+
+ explore value ARG
+
+ - ARG is a valid expression.
+ - At any stage of exploration, hit the return key (instead of a
+ choice, if any) to return to the enclosing value.
+ """
+
+ def __init__(self):
+ super(ExploreValueCommand, self).__init__(
+ name = "explore value", command_class = gdb.COMMAND_DATA)
+
+ def invoke(self, arg_str, from_tty):
+ if ExploreUtils.check_args("explore value", arg_str) == False:
+ return
+
+ value = ExploreUtils.get_value_from_str(arg_str)
+ if value is None:
+ raise gdb.GdbError(
+ (" '%s' does not evaluate to a value in the current "
+ "context." %
+ arg_str))
+ return
+
+ Explorer.explore_expr(arg_str, value, False)
+
+
+class ExploreTypeCommand(gdb.Command):
+ """Explore a type or the type of an expression valid in the current
+ context.
+
+ Usage:
+
+ explore type ARG
+
+ - ARG is a valid expression or a type name.
+ - At any stage of exploration, hit the return key (instead of a
+ choice, if any) to return to the enclosing type.
+ """
+
+ def __init__(self):
+ super(ExploreTypeCommand, self).__init__(
+ name = "explore type", command_class = gdb.COMMAND_DATA)
+
+ def invoke(self, arg_str, from_tty):
+ if ExploreUtils.check_args("explore type", arg_str) == False:
+ return
+
+ datatype = ExploreUtils.get_type_from_str(arg_str)
+ if datatype is not None:
+ Explorer.explore_type(arg_str, datatype, False)
+ return
+
+ value = ExploreUtils.get_value_from_str(arg_str)
+ if value is not None:
+ print "'%s' is of type '%s'." % (arg_str, str(value.type))
+ Explorer.explore_type(str(value.type), value.type, False)
+
+ raise gdb.GdbError(("'%s' is not a type or value in the current "
+ "context." % arg_str))
+
+
+Explorer.init_env()
+
+ExploreCommand()
+ExploreValueCommand()
+ExploreTypeCommand()
diff -rupN src/gdb/testsuite/gdb.python/Makefile.in src_explore_python/gdb/testsuite/gdb.python/Makefile.in
--- src/gdb/testsuite/gdb.python/Makefile.in 2011-12-23 22:36:16.000000000 +0530
+++ src_explore_python/gdb/testsuite/gdb.python/Makefile.in 2012-02-19 17:51:28.783055525 +0530
@@ -5,7 +5,7 @@ EXECUTABLES = py-type py-value py-pretty
py-symbol py-mi py-breakpoint py-inferior py-infthread \
py-shared python lib-types py-events py-evthreads py-frame \
py-mi py-pp-maint py-progspace py-section-script py-objfile \
- py-finish-breakpoint py-finish-breakpoint2
+ py-finish-breakpoint py-finish-breakpoint2 py-explore

MISCELLANEOUS = py-shared-sl.sl py-events-shlib.so py-events-shlib-nodebug.so

diff -rupN src/gdb/testsuite/gdb.python/py-explore.c src_explore_python/gdb/testsuite/gdb.python/py-explore.c
--- src/gdb/testsuite/gdb.python/py-explore.c 1970-01-01 05:30:00.000000000 +0530
+++ src_explore_python/gdb/testsuite/gdb.python/py-explore.c 2012-02-20 18:17:18.534828901 +0530
@@ -0,0 +1,82 @@
+/* This testcase is part of GDB, the GNU debugger.
+
+ Copyright 2012 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/>.
+*/
+
+#define ARRAY_SIZE 10
+
+struct SimpleStruct
+{
+ int a;
+ double d;
+};
+
+union SimpleUnion
+{
+ int i;
+ char c;
+ float f;
+ double d;
+};
+
+typedef struct SimpleStruct SS;
+
+struct ComplexStruct
+{
+ struct SimpleStruct s;
+ union SimpleUnion u;
+ SS sa[ARRAY_SIZE];
+};
+
+union ComplexUnion
+{
+ SS s;
+ struct SimpleStruct sa[ARRAY_SIZE];
+};
+
+int
+main (void)
+{
+ struct SimpleStruct ss;
+ struct SimpleStruct* ss_ptr = &ss;
+ SS ss_t;
+
+ union SimpleUnion su;
+ struct ComplexStruct cs;
+ struct ComplexStruct* cs_ptr = &cs;
+ union ComplexUnion cu;
+ int i;
+ double darray[5] = {0.1, 0.2, 0.3, 0.4, 0.5};
+ double *darray_ref = darray;
+
+ ss.a = 10;
+ ss.d = 100.01;
+ ss_t = ss;
+
+ su.d = 100.1;
+
+ cs.s = ss;
+ cs.u = su;
+ for (i = 0; i < ARRAY_SIZE; i++)
+ {
+ cs.sa[i].a = i;
+ cs.sa[i].d = 10.10 + i;
+ cu.sa[i].a = i;
+ cu.sa[i].d = 100.10 + i;
+ }
+
+ return 0; /* Break here. */
+}
diff -rupN src/gdb/testsuite/gdb.python/py-explore.exp src_explore_python/gdb/testsuite/gdb.python/py-explore.exp
--- src/gdb/testsuite/gdb.python/py-explore.exp 1970-01-01 05:30:00.000000000 +0530
+++ src_explore_python/gdb/testsuite/gdb.python/py-explore.exp 2012-03-18 12:50:34.212131820 +0530
@@ -0,0 +1,469 @@
+# Copyright 2012 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/>.
+
+set testfile "py-explore"
+set srcfile ${testfile}.c
+set binfile ${objdir}/${subdir}/${testfile}
+if { [prepare_for_testing ${testfile}.exp ${testfile} ${srcfile}] } {
+ return -1
+}
+
+# Skip all tests if Python scripting is not enabled.
+if { [skip_python_tests] } { continue }
+
+set SS "struct SimpleStruct"
+set SU "union SimpleUnion"
+set CS "struct ComplexStruct"
+set CU "union ComplexUnion"
+set enter_field_number_prompt {Enter the field number of choice: }
+set return_to_parent_prompt {Press enter to return to parent value: }
+set array_index_prompt {Enter the index of the element you want to explore in .*: }
+
+proc compound_description { value_name type_desc type_name } {
+ return "The value of '$value_name' is a $type_desc of type '$type_name' with the following fields:\[\r\n\]+"
+}
+
+proc typedef_description { value_name typedef_name type_name } {
+ return "The value of '$value_name' is of type '$typedef_name' which is a typedef of type '$type_name'\.\[\r\n\]+"
+}
+
+proc scalar_description { value_name type } {
+ return "'$value_name' is a scalar value of type '$type'\.\[\r\n\]+"
+}
+
+proc array_description { value_name type } {
+ return "'$value_name' is an array of '$type'\.\[\r\n\]+"
+}
+
+proc pointer_description { value_name type_name } {
+ set type_description "'$value_name' is a pointer to a value of type '$type_name'\.\[\r\n\]+"
+ set prompt "Continue exploring it as a pointer to a single value \[\[\]y/n\[\]\]: "
+ return "$type_description$prompt"
+}
+
+proc field_values { args } {
+ set result ""
+ foreach field $args {
+ set result "$result\[ \]*$field \[\.\]\[\.\] \[\(\]Value of type .*\[\)\]\[\r\n\]+"
+ }
+ return $result
+}
+
+proc field_choices { args } {
+ set result ""
+ set field_num 0
+ foreach field $args {
+ set result "$result$field\[ \]+=\[ \]+<Enter $field_num to explore this field of type .*"
+ incr field_num
+ }
+ return $result
+}
+
+proc scalar_value { value_name value } {
+ return "$value_name = $value\[r\n\]+"
+}
+
+set SS_fields [field_values {a = 10} {d = 100[.].*}]
+
+if ![runto_main] {
+ return -1
+}
+
+gdb_breakpoint [gdb_get_line_number "Break here."]
+gdb_continue_to_breakpoint "Break here" ".*Break here.*"
+
+#########################
+# Value exploration tests
+#########################
+
+gdb_test "explore i" "[scalar_description {i} {int}].*i = .*"
+gdb_test "explore ss" "[compound_description {ss} {struct/class} $SS].*$SS_fields"
+gdb_test "explore *ss_ptr" "[compound_description {\*ss_ptr} {struct/class} $SS].*$SS_fields"
+gdb_test "explore ss_t" "[typedef_description {ss_t} {SS} $SS].*[compound_description {ss_t} {struct/class} $SS].*$SS_fields"
+
+gdb_test_multiple "explore ss_ptr" "" {
+ -re "[pointer_description {ss_ptr} $SS].*" {
+ pass "explore ss_ptr"
+ gdb_test_multiple "y" "explore_as_single_value_pointer" {
+ -re "$SS_fields" {
+ pass "explore ss_ptr as single value pointer"
+ }
+ }
+ }
+}
+
+gdb_test_multiple "explore darray_ref" "" {
+ -re "[pointer_description {darray_ref} {double}].*" {
+ pass "explore darray_ref"
+ gdb_test_multiple "n" "no_to_explore_as_pointer" {
+ -re "Continue exploring it as a pointer to an array \[\[\]y/n\[\]\]: " {
+ pass "no_to_explore_as_pointer"
+ gdb_test_multiple "y" "explore_as_array" {
+ -re ".*Enter the index of the element you want to explore in 'darray_ref':.*" {
+ pass "explore_as_array"
+ gdb_test_multiple "2" "explore_as_array_index_2" {
+ -re ".*'darray_ref\\\[2\\\]' is a scalar value of type 'double'\..*darray_ref\\\[2\\\] = 0.*" {
+ pass "explore_as_array_index_2"
+ gdb_test_multiple "\0" "end explore_as_array_index_2" {
+ -re ".*Returning to parent value.*Enter the index of the element you want to explore in 'darray_ref':.*" {
+ pass "end explore_as_array_index_2"
+ gdb_test_multiple "\0" "end explore_as_array" {
+ -re "\[\n\r\]+" {
+ pass "end explore_as_array"
+ }
+ }
+ }
+ }
+ }
+ }
+ }
+ }
+ }
+ }
+ }
+}
+
+gdb_test_multiple "explore su" "" {
+ -re "[compound_description {su} {union} {union SimpleUnion}].*[field_choices {i} {c} {f} {d}].*$enter_field_number_prompt" {
+ pass "explore su"
+ gdb_test_multiple "3" "explore su.d" {
+ -re "[scalar_description {su.d} {double}].*[scalar_value {su.d} {100[.].*}].*$return_to_parent_prompt" {
+ pass "explore su.d"
+ gdb_test_multiple " " "end su.d exploration" {
+ -re ".*[compound_description {su} {union} {union SimpleUnion}].*[field_choices {i} {c} {f} {d}].*$enter_field_number_prompt" {
+ pass "end su.d exploration"
+ gdb_test_multiple "\0" "end su exploration" {
+ -re "$gdb_prompt" {
+ pass "end su exploration"
+ }
+ }
+ }
+ }
+ }
+ }
+ }
+}
+
+gdb_test_multiple "explore cs" "" {
+ -re "[compound_description {cs} {struct/class} {struct ComplexStruct}].*[field_choices {s} {u} {sa}].*$enter_field_number_prompt" {
+ pass "explore cs"
+ gdb_test_multiple "0" "explore cs.s" {
+ -re "[compound_description {cs.s} {struct/class} {struct SimpleStruct}].*[field_values {a = 10} {d = 100[.].*}].*$return_to_parent_prompt" {
+ pass "explore cs.s"
+ gdb_test_multiple " " "end cs.s exploration" {
+ -re ".*$enter_field_number_prompt" {
+ pass "end cs.s exploration"
+ gdb_test_multiple "\0" "end cs exploration" {
+ -re "$gdb_prompt" {
+ pass "end cs exploration"
+ }
+ }
+ }
+ }
+ }
+ }
+ }
+}
+
+gdb_test_multiple "explore cu" "" {
+ -re "[compound_description {cu} {union} {union ComplexUnion}].*[field_choices {s} {sa}].*$enter_field_number_prompt" {
+ pass "explore cu"
+ gdb_test_multiple "1" "explore cu.sa" {
+ -re ".*[array_description {cu.sa} $SS].*$array_index_prompt" {
+ pass "explore cu.sa"
+ gdb_test_multiple "0" "explore cu.sa\[0\]" {
+ -re "[compound_description {\(cu.sa\)\[0\]} {struct/class} {struct SimpleStruct}].*[field_values {a = 0} {d = 100[.].*}].*$return_to_parent_prompt" {
+ pass "explore cu.sa\[0\]"
+ gdb_test_multiple "\0" "end cu.sa\[0\] exploration" {
+ -re "[array_description {cu.sa} $SS]$array_index_prompt" {
+ pass "end cu.sa\[0\] exploration"
+ }
+ }
+ }
+ }
+ gdb_test_multiple "\0" "end cu.sa exploration" {
+ -re ".*$enter_field_number_prompt" {
+ pass "end cu.sa exploration"
+ gdb_test_multiple "\0" "end cu exploration" {
+ -re "$gdb_prompt" {
+ pass "end cu exploration"
+ }
+ }
+ }
+ }
+ }
+ }
+ }
+}
+
+########################
+# Type exploration tests
+########################
+
+proc scalar_type_decsription {type} {
+ return "'$type' is a scalar type\."
+}
+
+proc child_scalar_type_description {path type} {
+ return "$path is of a scalar type '$type'\."
+}
+
+proc compound_type_description { type_name type_desc } {
+ return "'$type_name' is a $type_desc with the following fields:"
+}
+
+proc child_compound_type_description { path type_name type_desc } {
+ return "$path is a $type_desc of type '$type_name' with the following fields:"
+}
+
+proc child_array_type_description { path target_type_name } {
+ return "$path is an array of '$target_type_name'\."
+}
+
+proc typedef_type_description { type_name target_name } {
+ return "The type '$type_name' is a typedef of type '$target_name'\."
+}
+
+set SS_fields_types [field_choices {a} {d}]
+set SU_fields_types [field_choices {i} {c} {f} {d}]
+set CS_fields_types [field_choices {s} {u} {sa}]
+set CU_fields_types [field_choices {s} {sa}]
+
+set CS_field_0 "field 's' of 'struct ComplexStruct'"
+set CS_field_1 "field 'u' of 'struct ComplexStruct'"
+set CS_field_2 "field 'sa' of 'struct ComplexStruct'"
+set CS_field_2_array_element "an array element of $CS_field_2"
+
+set CU_field_0 "field 's' of 'union ComplexUnion'"
+set CU_field_1 "field 'sa' of 'union ComplexUnion'"
+set CU_field_1_array_element "an array element of $CU_field_1"
+
+gdb_test "explore int" ".*[scalar_type_decsription {int}].*"
+
+gdb_test_multiple "explore struct SimpleStruct" "" {
+ -re ".*[compound_type_description $SS {struct/class}].*$SS_fields_types.*" {
+ pass "explore struct SimpleStruct"
+ gdb_test_multiple "0" "explore type struct SimpleStruct feild 0" {
+ -re ".*[child_scalar_type_description {field 'a' of 'struct SimpleStruct'} {int}].*" {
+ pass "explore type struct SimpleStruct feild 0"
+ gdb_test_multiple "\0" "return to struct SimpleStruct from field 0" {
+ -re ".*[compound_type_description $SS {struct/class}].*$SS_fields_types.*" {
+ pass "return to struct SimpleStruct from field 0"
+ }
+ }
+ }
+ }
+ gdb_test_multiple "1" "explore type struct SimpleStruct feild 1" {
+ -re ".*[child_scalar_type_description {field 'd' of 'struct SimpleStruct'} {double}].*" {
+ pass "explore type struct SimpleStruct feild 1"
+ gdb_test_multiple "\0" "return to struct SimpleStruct from field 1" {
+ -re ".*[compound_type_description $SS {struct/class}].*$SS_fields_types.*" {
+ pass "return to struct SimpleStruct from field 1"
+ }
+ }
+ }
+ }
+ gdb_test_multiple "\0" "return to GDB prompt from struct SimpleStruct" {
+ -re "$gdb_prompt" {
+ pass "return to GDB prompt from struct SimpleStruct"
+ }
+ }
+ }
+}
+
+gdb_test_multiple "explore union SimpleUnion" "" {
+ -re ".*[compound_type_description $SU {union}].*$SU_fields_types.*" {
+ pass "explore union SimpleUnion"
+ gdb_test_multiple "0" "explore type union SimpleUnion feild 0" {
+ -re ".*[child_scalar_type_description {field 'i' of 'union SimpleUnion'} {int}].*" {
+ pass "explore type union SimpleUnion feild 0"
+ gdb_test_multiple "\0" "return to union SimpleUnion from field 0" {
+ -re ".*[compound_type_description $SU {union}].*$SU_fields_types.*" {
+ pass "return to union SimpleUnion from field 0"
+ }
+ }
+ }
+ }
+ gdb_test_multiple "1" "explore type union SimpleUnion feild 1" {
+ -re ".*[child_scalar_type_description {field 'c' of 'union SimpleUnion'} {char}].*" {
+ pass "explore type union SimpleUnion feild 1"
+ gdb_test_multiple "\0" "return to union SimpleUnion from field 1" {
+ -re ".*[compound_type_description $SU {union}].*$SU_fields_types.*" {
+ pass "return to union SimpleUnion from field 1"
+ }
+ }
+ }
+ }
+ gdb_test_multiple "2" "explore type union SimpleUnion feild 2" {
+ -re ".*[child_scalar_type_description {field 'f' of 'union SimpleUnion'} {float}].*" {
+ pass "explore type union SimpleUnion feild 2"
+ gdb_test_multiple "\0" "return to union SimpleUnion from field 2" {
+ -re ".*[compound_type_description $SU {union}].*$SU_fields_types.*" {
+ pass "return to union SimpleUnion from field 2"
+ }
+ }
+ }
+ }
+ gdb_test_multiple "3" "explore type union SimpleUnion feild 3" {
+ -re ".*[child_scalar_type_description {field 'd' of 'union SimpleUnion'} {double}].*" {
+ pass "explore type union SimpleUnion feild 3"
+ gdb_test_multiple "\0" "return to union SimpleUnion from field 3" {
+ -re ".*[compound_type_description $SU {union}].*$SU_fields_types.*" {
+ pass "return to union SimpleUnion from field 3"
+ }
+ }
+ }
+ }
+ gdb_test_multiple "\0" "return to GDB prompt from union SimpleUnion" {
+ -re "$gdb_prompt" {
+ pass "return to GDB prompt from union SimpleUnion"
+ }
+ }
+ }
+}
+
+gdb_test_multiple "explore SS" "" {
+ -re ".*[typedef_type_description {SS} $SS].*[compound_type_description {SS} {struct/class}].*$SS_fields_types.*" {
+ pass "explore SS"
+ gdb_test_multiple "0" "explore type SS feild 0" {
+ -re ".*[child_scalar_type_description {field 'a' of 'SS'} {int}].*" {
+ pass "explore type SS feild 0"
+ gdb_test_multiple "\0" "return to SS from field 0" {
+ -re ".*[compound_type_description {SS} {struct/class}].*$SS_fields_types.*" {
+ pass "return to SS from field 0"
+ }
+ }
+ }
+ }
+ gdb_test_multiple "1" "explore type SS feild 1" {
+ -re ".*[child_scalar_type_description {field 'd' of 'SS'} {double}].*" {
+ pass "explore type SS feild 1"
+ gdb_test_multiple "\0" "return to struct SimpleStruct from field 1" {
+ -re ".*[compound_type_description {SS} {struct/class}].*$SS_fields_types.*" {
+ pass "return to SS field 1"
+ }
+ }
+ }
+ }
+ gdb_test_multiple "\0" "return to GDB prompt from SS" {
+ -re "$gdb_prompt" {
+ pass "return to GDB prompt from SS"
+ }
+ }
+ }
+}
+
+gdb_test_multiple "explore type struct ComplexStruct" "" {
+ -re ".*[compound_type_description $CS {struct/class}].*$CS_fields_types.*" {
+ pass "explore type struct ComplexStruct"
+ gdb_test_multiple "0" "explore type struct ComplexStruct field 0" {
+ -re ".*[child_compound_type_description $CS_field_0 $SS {struct/class}].*$SS_fields_types.*" {
+ pass "explore type struct ComplexStruct field 0"
+ gdb_test_multiple "\0" "return to ComplexStruct from field 0" {
+ -re ".*[compound_type_description $CS {struct/class}].*$CS_fields_types.*" {
+ pass "return to ComplexStruct from field 0"
+ }
+ }
+ }
+ }
+ gdb_test_multiple "1" "explore type struct ComplexStruct field 1" {
+ -re ".*[child_compound_type_description $CS_field_1 $SU {union}].*$SU_fields_types.*" {
+ pass "explore type struct ComplexStruct field 1"
+ gdb_test_multiple "\0" "return to ComplexStruct from field 1" {
+ -re ".*[compound_type_description $CS {struct/class}].*$CS_fields_types.*" {
+ pass "return to ComplexStruct from field 1"
+ }
+ }
+ }
+ }
+ gdb_test_multiple "2" "explore type struct ComplexStruct field 2" {
+ -re ".*[child_array_type_description $CS_field_2 {SS}].*" {
+ pass "explore type struct ComplexStruct field 2"
+ gdb_test_multiple "\0" "return to ComplexStruct from field 2" {
+ -re ".*[compound_type_description $CS {struct/class}].*$CS_fields_types.*" {
+ pass "return to ComplexStruct from field 2"
+ }
+ }
+ }
+ }
+ gdb_test_multiple "\0" "return to GDB prompt from ComplexStruct type exploration" {
+ -re "$gdb_prompt" {
+ pass "return to GDB prompt from ComplexStruct type exploration"
+ }
+ }
+ }
+}
+
+gdb_test_multiple "explore type union ComplexUnion" "" {
+ -re ".*[compound_type_description $CU {union}].*$CU_fields_types.*" {
+ pass "explore type union ComplexUnion"
+ gdb_test_multiple "0" "explore type union ComplexStruct field 0" {
+ -re ".*[child_compound_type_description $CU_field_0 $SS {struct/class}].*$SS_fields_types.*" {
+ pass "explore type union ComplexUnion field 0"
+ gdb_test_multiple "\0" "return to ComplexUnion from field 0" {
+ -re ".*[compound_type_description $CU {union}].*$CU_fields_types.*" {
+ pass "return to ComplexUnion from field 0"
+ }
+ }
+ }
+ }
+ gdb_test_multiple "1" "explore type union ComplexUnion field 1" {
+ -re ".*[child_array_type_description $CU_field_1 $SS].*" {
+ pass "explore type union ComplexUnion field 1"
+ gdb_test_multiple "\0" "return to ComplexUnion array" {
+ -re ".*[compound_type_description $CU {union}].*$CU_fields_types.*" {
+ pass "return to ComplexUnion from field 1"
+ }
+ }
+ }
+ }
+ gdb_test_multiple "\0" "return to GDB prompt from ComplexUnion type exploration" {
+ -re "$gdb_prompt" {
+ pass "return to GDB prompt from ComplexUnion type exploration"
+ }
+ }
+ }
+}
+
+gdb_test_multiple "explore type cu" "" {
+ -re "'cu' is of type 'union ComplexUnion'.*[compound_type_description $CU {union}].*$CU_fields_types.*" {
+ pass "explore type union ComplexUnion"
+ gdb_test_multiple "0" "explore type union ComplexStruct field 0" {
+ -re ".*[child_compound_type_description $CU_field_0 $SS {struct/class}].*$SS_fields_types.*" {
+ pass "explore type union ComplexUnion field 0"
+ gdb_test_multiple "\0" "return to ComplexUnion from field 0" {
+ -re ".*[compound_type_description $CU {union}].*$CU_fields_types.*" {
+ pass "return to ComplexUnion from field 0"
+ }
+ }
+ }
+ }
+ gdb_test_multiple "1" "explore type union ComplexUnion field 1" {
+ -re ".*[child_array_type_description $CU_field_1 $SS].*" {
+ pass "explore type union ComplexUnion field 1"
+ gdb_test_multiple "\0" "return to ComplexUnion array" {
+ -re ".*[compound_type_description $CU {union}].*$CU_fields_types.*" {
+ pass "return to ComplexUnion from field 1"
+ }
+ }
+ }
+ }
+ gdb_test_multiple "\0" "return to GDB prompt from ComplexUnion type exploration" {
+ -re "$gdb_prompt" {
+ pass "return to GDB prompt from ComplexUnion type exploration"
+ }
+ }
+ }
+}