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* gdb.texinfo: Add Objective-C documentation.

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Adam Fedor 2003-06-08 02:09:12 +00:00
parent 5f7adbf064
commit b37303eefd
2 changed files with 125 additions and 5 deletions
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gdb/doc/ChangeLog
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@ -1,3 +1,7 @@
2003-06-07 Adam Fedor <fedor@gnu.org>
* gdb.texinfo: Add Objective-C documentation.
2003-06-01 Andrew Cagney <cagney@redhat.com>
* gdbint.texinfo (Target Architecture Definition): Add "func_addr"

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gdb/doc/gdb.texinfo
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@ -210,6 +210,9 @@ syntax.
it may be necessary to refer to some variables with a trailing
underscore.
@value{GDBN} can be used to debug programs written in Objective-C,
using either the Apple/NeXT or the GNU Objective-C runtime.
@menu
* Free Software:: Freely redistributable software
* Contributors:: Contributors to GDB
@ -3180,7 +3183,8 @@ end
@cindex overloading
@cindex symbol overloading
Some programming languages (notably C@t{++}) permit a single function name
Some programming languages (notably C@t{++} and Objective-C) permit a
single function name
to be defined several times, for application in different contexts.
This is called @dfn{overloading}. When a function name is overloaded,
@samp{break @var{function}} is not enough to tell @value{GDBN} where you want
@ -7487,6 +7491,9 @@ C source file
@itemx .c++
C@t{++} source file
@item .m
Objective-C source file
@item .f
@itemx .F
Fortran source file
@ -7762,7 +7769,7 @@ being set automatically by @value{GDBN}.
@node Support
@section Supported languages
@value{GDBN} supports C, C@t{++}, Fortran, Java, assembly, and Modula-2.
@value{GDBN} supports C, C@t{++}, Objective-C, Fortran, Java, assembly, and Modula-2.
@c This is false ...
Some @value{GDBN} features may be used in expressions regardless of the
language you use: the @value{GDBN} @code{@@} and @code{::} operators,
@ -7779,8 +7786,9 @@ books written on each of these languages; please look to these for a
language reference or tutorial.
@menu
* C:: C and C@t{++}
* Modula-2:: Modula-2
* C:: C and C@t{++}
* Objective-C:: Objective-C
* Modula-2:: Modula-2
@end menu
@node C
@ -8297,7 +8305,101 @@ available choices, or to finish the type list for you.
@xref{Completion,, Command completion}, for details on how to do this.
@end table
@node Modula-2
@node Objective-C
@subsection Objective-C
@cindex Objective-C
This section provides information about some commands and command
options that are useful for debugging Objective-C code.
@menu
* Method Names in Commands::
* The Print Command with Objective-C::
@end menu
@node Method Names in Commands, The Print Command with Objective-C, Objective-C, Objective-C
@subsubsection Method Names in Commands
The following commands have been extended to accept Objective-C method
names as line specifications:
@kindex clear@r{, and Objective-C}
@kindex break@r{, and Objective-C}
@kindex info line@r{, and Objective-C}
@kindex jump@r{, and Objective-C}
@kindex list@r{, and Objective-C}
@itemize
@item @code{clear}
@item @code{break}
@item @code{info line}
@item @code{jump}
@item @code{list}
@end itemize
A fully qualified Objective-C method name is specified as
@smallexample
-[@var{Class} @var{methodName}]
@end smallexample
where the minus sign is used to indicate an instance method and a plus
sign (not shown) is used to indicate a class method. The
class name @var{Class} and method name @var{methoName} are enclosed in
brackets, similar to the way messages are specified in Objective-C source
code. For example, to set a breakpoint at the @code{create} instance method of
class @code{Fruit} in the program currently being debugged, enter:
@smallexample
break -[Fruit create]
@end smallexample
To list ten program lines around the @code{initialize} class method,
enter:
@smallexample
list +[NSText initialize]
@end smallexample
In the current version of GDB, the plus or minus sign is required. In
future versions of GDB, the plus or minus sign will be optional, but you
can use it to narrow the search. It is also possible to specify just a
method name:
@smallexample
break create
@end smallexample
You must specify the complete method name, including any colons. If
your program's source files contain more than one @code{create} method,
you'll be presented with a numbered list of classes that implement that
method. Indicate your choice by number, or type @samp{0} to exit if
none apply.
As another example, to clear a breakpoint established at the
@code{makeKeyAndOrderFront:} method of the @code{NSWindow} class, enter:
@smallexample
clear -[NSWindow makeKeyAndOrderFront:]
@end smallexample
@node The Print Command with Objective-C
@subsubsection The Print Command With Objective-C
The print command has also been extended to accept methods. For example:
@smallexample
print -[object hash]
@end smallexample
@cindex print an Objective-C object description
will tell gdb to send the -hash message to object and print the
result. Also an additional command has been added, @code{print-object}
or @code{po} for short, which is meant to print the description of an
object. However, this command may only work with certain Objective-C
libraries that have a particular hook function, called
@code{_NSPrintForDebugger} defined.
@node Modula-2, , Objective-C, Support
@subsection Modula-2
@cindex Modula-2, @value{GDBN} support
@ -8937,6 +9039,20 @@ Print the names and data types of all variables (except for local
variables) whose names contain a match for regular expression
@var{regexp}.
@kindex info classes
@item info classes
@itemx info classes @var{regexp}
Display all Objective-C classes in your program, or
(with the @var{regexp} argument) all those matching a particular regular
expression.
@kindex info selectors
@item info selectors
@itemx info selectors @var{regexp}
Display all Objective-C selectors in your program, or
(with the @var{regexp} argument) all those matching a particular regular
expression.
@ignore
This was never implemented.
@kindex info methods