This is annotate.info, produced by makeinfo version 7.1 from
annotate.texinfo.
Copyright © 1994-2024 Free Software Foundation, Inc.
Permission is granted to copy, distribute and/or modify this document
under the terms of the GNU Free Documentation License, Version 1.3 or
any later version published by the Free Software Foundation; with no
Invariant Sections, with no Front-Cover Texts, and with no Back-Cover
Texts. A copy of the license is included in the section entitled "GNU
Free Documentation License".
INFO-DIR-SECTION Software development
START-INFO-DIR-ENTRY
* Annotate: (annotate). The obsolete annotation interface.
END-INFO-DIR-ENTRY
This file documents GDB's obsolete annotations.
Copyright © 1994-2024 Free Software Foundation, Inc.
Permission is granted to copy, distribute and/or modify this document
under the terms of the GNU Free Documentation License, Version 1.3 or
any later version published by the Free Software Foundation; with no
Invariant Sections, with no Front-Cover Texts, and with no Back-Cover
Texts. A copy of the license is included in the section entitled "GNU
Free Documentation License".
File: annotate.info, Node: Top, Next: Annotations Overview, Up: (dir)
GDB Annotations
***************
This document describes the obsolete level two annotation interface
implemented in older GDB versions.
* Menu:
* Annotations Overview:: What annotations are; the general syntax.
* Limitations:: Limitations of the annotation interface.
* Migrating to GDB/MI:: Migrating to GDB/MI
* Server Prefix:: Issuing a command without affecting user state.
* Value Annotations:: Values are marked as such.
* Frame Annotations:: Stack frames are annotated.
* Displays:: GDB can be told to display something periodically.
* Prompting:: Annotations marking GDB's need for input.
* Errors:: Annotations for error messages.
* Breakpoint Info:: Information on breakpoints.
* Invalidation:: Some annotations describe things now invalid.
* Annotations for Running::
Whether the program is running, how it stopped, etc.
* Source Annotations:: Annotations describing source code.
* Multi-threaded Apps:: An annotation that reports multi-threadedness.
* GNU Free Documentation License::
File: annotate.info, Node: Annotations Overview, Next: Limitations, Prev: Top, Up: Top
1 What is an Annotation?
************************
To produce obsolete level two annotations, start GDB with the
‘--annotate=2’ option.
Annotations start with a newline character, two ‘control-z’
characters, and the name of the annotation. If there is no additional
information associated with this annotation, the name of the annotation
is followed immediately by a newline. If there is additional
information, the name of the annotation is followed by a space, the
additional information, and a newline. The additional information
cannot contain newline characters.
Any output not beginning with a newline and two ‘control-z’
characters denotes literal output from GDB. Currently there is no need
for GDB to output a newline followed by two ‘control-z’ characters, but
if there was such a need, the annotations could be extended with an
‘escape’ annotation which means those three characters as output.
A simple example of starting up GDB with annotations is:
$ gdb --annotate=2
GNU GDB 5.0
Copyright 2000 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License,
and you are welcome to change it and/or distribute copies of it
under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty"
for details.
This GDB was configured as "sparc-sun-sunos4.1.3"
^Z^Zpre-prompt
(gdb)
^Z^Zprompt
quit
^Z^Zpost-prompt
$
Here ‘quit’ is input to GDB; the rest is output from GDB. The three
lines beginning ‘^Z^Z’ (where ‘^Z’ denotes a ‘control-z’ character) are
annotations; the rest is output from GDB.
File: annotate.info, Node: Limitations, Next: Migrating to GDB/MI, Prev: Annotations Overview, Up: Top
2 Limitations of the Annotation Interface
*****************************************
The level two annotations mechanism is known to have a number of
technical and architectural limitations. As a consequence, in 2001,
with the release of GDB 5.1 and the addition of GDB/MI, the annotation
interface was marked as deprecated.
This chapter discusses the known problems.
2.1 Dependant on CLI output
===========================
The annotation interface works by interspersing markups with GDB normal
command-line interpreter output. Unfortunately, this makes the
annotation client dependant on not just the annotations, but also the
CLI output. This is because the client is forced to assume that
specific GDB commands provide specific information. Any change to GDB's
CLI output modifies or removes that information and, consequently,
likely breaks the client.
Since the GDB/MI output is independent of the CLI, it does not have
this problem.
2.2 Scalability
===============
The annotation interface relies on value annotations (*note Value
Annotations::) and the display mechanism as a way of obtaining
up-to-date value information. These mechanisms are not scalable.
In a graphical environment, where many values can be displayed
simultaneously, a serious performance problem occurs when the client
tries to first extract from GDB, and then re-display, all those values.
The client should instead only request and update the values that
changed.
The GDB/MI Variable Objects provide just that mechanism.
2.3 Correctness
===============
The annotation interface assumes that a variable's value can only be
changed when the target is running. This assumption is not correct. A
single assignment to a single variable can result in the entire target,
and all displayed values, needing an update.
The GDB/MI Variable Objects include a mechanism for efficiently
reporting such changes.
2.4 Reliability
===============
The GDB/MI interface includes a dedicated test directory (‘gdb/gdb.mi’),
and any addition or fix to GDB/MI must include testsuite changes.
2.5 Maintainability
===================
The annotation mechanism was implemented by interspersing CLI print
statements with various annotations. As a consequence, any CLI output
change can alter the annotation output.
Since the GDB/MI output is independent of the CLI, and the GDB/MI is
increasingly implemented independent of the CLI code, its long term
maintenance is much easier.
File: annotate.info, Node: Migrating to GDB/MI, Next: Server Prefix, Prev: Limitations, Up: Top
3 Migrating to GDB/MI
*********************
By using the ‘interp mi’ command, it is possible for annotation clients
to invoke GDB/MI commands, and hence access the GDB/MI. By doing this,
existing annotation clients have a migration path from this obsolete
interface to GDB/MI.
File: annotate.info, Node: Server Prefix, Next: Value Annotations, Prev: Migrating to GDB/MI, Up: Top
4 The Server Prefix
*******************
To issue a command to GDB without affecting certain aspects of the state
which is seen by users, prefix it with ‘server ’. This means that this
command will not affect the command history, nor will it affect GDB's
notion of which command to repeat if <RET> is pressed on a line by
itself.
The server prefix does not affect the recording of values into the
value history; to print a value without recording it into the value
history, use the ‘output’ command instead of the ‘print’ command.
File: annotate.info, Node: Value Annotations, Next: Frame Annotations, Prev: Server Prefix, Up: Top
5 Values
********
_Value Annotations have been removed. GDB/MI instead provides Variable
Objects._
When a value is printed in various contexts, GDB uses annotations to
delimit the value from the surrounding text.
If a value is printed using ‘print’ and added to the value history,
the annotation looks like
^Z^Zvalue-history-begin HISTORY-NUMBER VALUE-FLAGS
HISTORY-STRING
^Z^Zvalue-history-value
THE-VALUE
^Z^Zvalue-history-end
where HISTORY-NUMBER is the number it is getting in the value history,
HISTORY-STRING is a string, such as ‘$5 = ’, which introduces the value
to the user, THE-VALUE is the output corresponding to the value itself,
and VALUE-FLAGS is ‘*’ for a value which can be dereferenced and ‘-’ for
a value which cannot.
If the value is not added to the value history (it is an invalid
float or it is printed with the ‘output’ command), the annotation is
similar:
^Z^Zvalue-begin VALUE-FLAGS
THE-VALUE
^Z^Zvalue-end
When GDB prints an argument to a function (for example, in the output
from the ‘backtrace’ command), it annotates it as follows:
^Z^Zarg-begin
ARGUMENT-NAME
^Z^Zarg-name-end
SEPARATOR-STRING
^Z^Zarg-value VALUE-FLAGS
THE-VALUE
^Z^Zarg-end
where ARGUMENT-NAME is the name of the argument, SEPARATOR-STRING is
text which separates the name from the value for the user's benefit
(such as ‘=’), and VALUE-FLAGS and THE-VALUE have the same meanings as
in a ‘value-history-begin’ annotation.
When printing a structure, GDB annotates it as follows:
^Z^Zfield-begin VALUE-FLAGS
FIELD-NAME
^Z^Zfield-name-end
SEPARATOR-STRING
^Z^Zfield-value
THE-VALUE
^Z^Zfield-end
where FIELD-NAME is the name of the field, SEPARATOR-STRING is text
which separates the name from the value for the user's benefit (such as
‘=’), and VALUE-FLAGS and THE-VALUE have the same meanings as in a
‘value-history-begin’ annotation.
When printing an array, GDB annotates it as follows:
^Z^Zarray-section-begin ARRAY-INDEX VALUE-FLAGS
where ARRAY-INDEX is the index of the first element being annotated and
VALUE-FLAGS has the same meaning as in a ‘value-history-begin’
annotation. This is followed by any number of elements, where is
element can be either a single element:
‘,’ WHITESPACE ; omitted for the first element
THE-VALUE
^Z^Zelt
or a repeated element
‘,’ WHITESPACE ; omitted for the first element
THE-VALUE
^Z^Zelt-rep NUMBER-OF-REPETITIONS
REPETITION-STRING
^Z^Zelt-rep-end
In both cases, THE-VALUE is the output for the value of the element
and WHITESPACE can contain spaces, tabs, and newlines. In the repeated
case, NUMBER-OF-REPETITIONS is the number of consecutive array elements
which contain that value, and REPETITION-STRING is a string which is
designed to convey to the user that repetition is being depicted.
Once all the array elements have been output, the array annotation is
ended with
^Z^Zarray-section-end
File: annotate.info, Node: Frame Annotations, Next: Displays, Prev: Value Annotations, Up: Top
6 Frames
********
_Value Annotations have been removed. GDB/MI instead provides a number
of frame commands._
_Frame annotations are no longer available. The GDB/MI provides
‘-stack-list-arguments’, ‘-stack-list-locals’, and ‘-stack-list-frames’
commands._
Whenever GDB prints a frame, it annotates it. For example, this
applies to frames printed when GDB stops, output from commands such as
‘backtrace’ or ‘up’, etc.
The frame annotation begins with
^Z^Zframe-begin LEVEL ADDRESS
LEVEL-STRING
where LEVEL is the number of the frame (0 is the innermost frame, and
other frames have positive numbers), ADDRESS is the address of the code
executing in that frame, and LEVEL-STRING is a string designed to convey
the level to the user. ADDRESS is in the form ‘0x’ followed by one or
more lowercase hex digits (note that this does not depend on the
language). The frame ends with
^Z^Zframe-end
Between these annotations is the main body of the frame, which can
consist of
• ^Z^Zfunction-call
FUNCTION-CALL-STRING
where FUNCTION-CALL-STRING is text designed to convey to the user
that this frame is associated with a function call made by GDB to a
function in the program being debugged.
• ^Z^Zsignal-handler-caller
SIGNAL-HANDLER-CALLER-STRING
where SIGNAL-HANDLER-CALLER-STRING is text designed to convey to
the user that this frame is associated with whatever mechanism is
used by this operating system to call a signal handler (it is the
frame which calls the signal handler, not the frame for the signal
handler itself).
• A normal frame.
This can optionally (depending on whether this is thought of as
interesting information for the user to see) begin with
^Z^Zframe-address
ADDRESS
^Z^Zframe-address-end
SEPARATOR-STRING
where ADDRESS is the address executing in the frame (the same
address as in the ‘frame-begin’ annotation, but printed in a form
which is intended for user consumption--in particular, the syntax
varies depending on the language), and SEPARATOR-STRING is a string
intended to separate this address from what follows for the user's
benefit.
Then comes
^Z^Zframe-function-name
FUNCTION-NAME
^Z^Zframe-args
ARGUMENTS
where FUNCTION-NAME is the name of the function executing in the
frame, or ‘??’ if not known, and ARGUMENTS are the arguments to the
frame, with parentheses around them (each argument is annotated
individually as well, *note Value Annotations::).
If source information is available, a reference to it is then
printed:
^Z^Zframe-source-begin
SOURCE-INTRO-STRING
^Z^Zframe-source-file
FILENAME
^Z^Zframe-source-file-end
:
^Z^Zframe-source-line
LINE-NUMBER
^Z^Zframe-source-end
where SOURCE-INTRO-STRING separates for the user's benefit the
reference from the text which precedes it, FILENAME is the name of
the source file, and LINE-NUMBER is the line number within that
file (the first line is line 1).
If GDB prints some information about where the frame is from (which
library, which load segment, etc.; currently only done on the
RS/6000), it is annotated with
^Z^Zframe-where
INFORMATION
Then, if source is to actually be displayed for this frame (for
example, this is not true for output from the ‘backtrace’ command),
then a ‘source’ annotation (*note Source Annotations::) is
displayed. Unlike most annotations, this is output instead of the
normal text which would be output, not in addition.
File: annotate.info, Node: Displays, Next: Prompting, Prev: Frame Annotations, Up: Top
7 Displays
**********
_Display Annotations have been removed. GDB/MI instead provides
Variable Objects._
When GDB is told to display something using the ‘display’ command,
the results of the display are annotated:
^Z^Zdisplay-begin
NUMBER
^Z^Zdisplay-number-end
NUMBER-SEPARATOR
^Z^Zdisplay-format
FORMAT
^Z^Zdisplay-expression
EXPRESSION
^Z^Zdisplay-expression-end
EXPRESSION-SEPARATOR
^Z^Zdisplay-value
VALUE
^Z^Zdisplay-end
where NUMBER is the number of the display, NUMBER-SEPARATOR is intended
to separate the number from what follows for the user, FORMAT includes
information such as the size, format, or other information about how the
value is being displayed, EXPRESSION is the expression being displayed,
EXPRESSION-SEPARATOR is intended to separate the expression from the
text that follows for the user, and VALUE is the actual value being
displayed.
File: annotate.info, Node: Prompting, Next: Errors, Prev: Displays, Up: Top
8 Annotation for GDB Input
**************************
When GDB prompts for input, it annotates this fact so it is possible to
know when to send output, when the output from a given command is over,
etc.
Different kinds of input each have a different “input type”. Each
input type has three annotations: a ‘pre-’ annotation, which denotes the
beginning of any prompt which is being output, a plain annotation, which
denotes the end of the prompt, and then a ‘post-’ annotation which
denotes the end of any echo which may (or may not) be associated with
the input. For example, the ‘prompt’ input type features the following
annotations:
^Z^Zpre-prompt
^Z^Zprompt
^Z^Zpost-prompt
The input types are
‘prompt’
When GDB is prompting for a command (the main GDB prompt).
‘commands’
When GDB prompts for a set of commands, like in the ‘commands’
command. The annotations are repeated for each command which is
input.
‘overload-choice’
When GDB wants the user to select between various overloaded
functions.
‘query’
When GDB wants the user to confirm a potentially dangerous
operation.
‘prompt-for-continue’
When GDB is asking the user to press return to continue. Note:
Don't expect this to work well; instead use ‘set height 0’ to
disable prompting. This is because the counting of lines is buggy
in the presence of annotations.
File: annotate.info, Node: Errors, Next: Breakpoint Info, Prev: Prompting, Up: Top
9 Errors
********
^Z^Zquit
This annotation occurs right before GDB responds to an interrupt.
^Z^Zerror
This annotation occurs right before GDB responds to an error.
Quit and error annotations indicate that any annotations which GDB
was in the middle of may end abruptly. For example, if a
‘value-history-begin’ annotation is followed by a ‘error’, one cannot
expect to receive the matching ‘value-history-end’. One cannot expect
not to receive it either, however; an error annotation does not
necessarily mean that GDB is immediately returning all the way to the
top level.
A quit or error annotation may be preceded by
^Z^Zerror-begin
Any output between that and the quit or error annotation is the error
message.
Warning messages are not yet annotated.
File: annotate.info, Node: Breakpoint Info, Next: Invalidation, Prev: Errors, Up: Top
10 Information on Breakpoints
*****************************
_Breakpoint Annotations have been removed. GDB/MI instead provides
breakpoint commands._
The output from the ‘info breakpoints’ command is annotated as
follows:
^Z^Zbreakpoints-headers
HEADER-ENTRY
^Z^Zbreakpoints-table
where HEADER-ENTRY has the same syntax as an entry (see below) but
instead of containing data, it contains strings which are intended to
convey the meaning of each field to the user. This is followed by any
number of entries. If a field does not apply for this entry, it is
omitted. Fields may contain trailing whitespace. Each entry consists
of:
^Z^Zrecord
^Z^Zfield 0
NUMBER
^Z^Zfield 1
TYPE
^Z^Zfield 2
DISPOSITION
^Z^Zfield 3
ENABLE
^Z^Zfield 4
ADDRESS
^Z^Zfield 5
WHAT
^Z^Zfield 6
FRAME
^Z^Zfield 7
CONDITION
^Z^Zfield 8
IGNORE-COUNT
^Z^Zfield 9
COMMANDS
Note that ADDRESS is intended for user consumption--the syntax varies
depending on the language.
The output ends with
^Z^Zbreakpoints-table-end
File: annotate.info, Node: Invalidation, Next: Annotations for Running, Prev: Breakpoint Info, Up: Top
11 Invalidation Notices
***********************
The following annotations say that certain pieces of state may have
changed.
‘^Z^Zframes-invalid’
The frames (for example, output from the ‘backtrace’ command) may
have changed.
‘^Z^Zbreakpoints-invalid’
The breakpoints may have changed. For example, the user just added
or deleted a breakpoint.
File: annotate.info, Node: Annotations for Running, Next: Source Annotations, Prev: Invalidation, Up: Top
12 Running the Program
**********************
When the program starts executing due to a GDB command such as ‘step’ or
‘continue’,
^Z^Zstarting
is output. When the program stops,
^Z^Zstopped
is output. Before the ‘stopped’ annotation, a variety of annotations
describe how the program stopped.
‘^Z^Zexited EXIT-STATUS’
The program exited, and EXIT-STATUS is the exit status (zero for
successful exit, otherwise nonzero).
‘^Z^Zsignalled’
The program exited with a signal. After the ‘^Z^Zsignalled’, the
annotation continues:
INTRO-TEXT
^Z^Zsignal-name
NAME
^Z^Zsignal-name-end
MIDDLE-TEXT
^Z^Zsignal-string
STRING
^Z^Zsignal-string-end
END-TEXT
where NAME is the name of the signal, such as ‘SIGILL’ or
‘SIGSEGV’, and STRING is the explanation of the signal, such as
‘Illegal Instruction’ or ‘Segmentation fault’. INTRO-TEXT,
MIDDLE-TEXT, and END-TEXT are for the user's benefit and have no
particular format.
‘^Z^Zsignal’
The syntax of this annotation is just like ‘signalled’, but GDB is
just saying that the program received the signal, not that it was
terminated with it.
‘^Z^Zbreakpoint NUMBER’
The program hit breakpoint number NUMBER.
‘^Z^Zwatchpoint NUMBER’
The program hit watchpoint number NUMBER.
File: annotate.info, Node: Source Annotations, Next: Multi-threaded Apps, Prev: Annotations for Running, Up: Top
13 Displaying Source
********************
The following annotation is used instead of displaying source code:
^Z^Zsource FILENAME:LINE:CHARACTER:MIDDLE:ADDR
where FILENAME is an absolute file name indicating which source file,
LINE is the line number within that file (where 1 is the first line in
the file), CHARACTER is the character position within the file (where 0
is the first character in the file) (for most debug formats this will
necessarily point to the beginning of a line), MIDDLE is ‘middle’ if
ADDR is in the middle of the line, or ‘beg’ if ADDR is at the beginning
of the line, and ADDR is the address in the target program associated
with the source which is being displayed. ADDR is in the form ‘0x’
followed by one or more lowercase hex digits (note that this does not
depend on the language).
File: annotate.info, Node: Multi-threaded Apps, Next: GNU Free Documentation License, Prev: Source Annotations, Up: Top
14 Multi-threaded Applications
******************************
The following annotations report thread related changes of state.
‘^Z^Znew-thread’
This annotation is issued once for each thread that is created
apart from the main thread, which is not reported.
‘^Z^Zthread-changed’
The selected thread has changed. This may occur at the request of
the user with the ‘thread’ command, or as a result of execution,
e.g., another thread hits a breakpoint.
‘^Z^Zthread-exited,id="ID",group-id="GID"’
This annotation is issued once for each thread that exits. The ID
field contains the global GDB identifier of the thread. The GID
field identifies the thread group this thread belongs to.
File: annotate.info, Node: GNU Free Documentation License, Prev: Multi-threaded Apps, Up: Top
Appendix A GNU Free Documentation License
*****************************************
Version 1.3, 3 November 2008
Copyright © 2000, 2001, 2002, 2007, 2008 Free Software Foundation, Inc.
<
http://fsf.org/>
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
0. PREAMBLE
The purpose of this License is to make a manual, textbook, or other
functional and useful document “free” in the sense of freedom: to
assure everyone the effective freedom to copy and redistribute it,
with or without modifying it, either commercially or
noncommercially. Secondarily, this License preserves for the
author and publisher a way to get credit for their work, while not
being considered responsible for modifications made by others.
This License is a kind of "copyleft", which means that derivative
works of the document must themselves be free in the same sense.
It complements the GNU General Public License, which is a copyleft
license designed for free software.
We have designed this License in order to use it for manuals for
free software, because free software needs free documentation: a
free program should come with manuals providing the same freedoms
that the software does. But this License is not limited to
software manuals; it can be used for any textual work, regardless
of subject matter or whether it is published as a printed book. We
recommend this License principally for works whose purpose is
instruction or reference.
1. APPLICABILITY AND DEFINITIONS
This License applies to any manual or other work, in any medium,
that contains a notice placed by the copyright holder saying it can
be distributed under the terms of this License. Such a notice
grants a world-wide, royalty-free license, unlimited in duration,
to use that work under the conditions stated herein. The
"Document", below, refers to any such manual or work. Any member
of the public is a licensee, and is addressed as "you". You accept
the license if you copy, modify or distribute the work in a way
requiring permission under copyright law.
A "Modified Version" of the Document means any work containing the
Document or a portion of it, either copied verbatim, or with
modifications and/or translated into another language.
A "Secondary Section" is a named appendix or a front-matter section
of the Document that deals exclusively with the relationship of the
publishers or authors of the Document to the Document's overall
subject (or to related matters) and contains nothing that could
fall directly within that overall subject. (Thus, if the Document
is in part a textbook of mathematics, a Secondary Section may not
explain any mathematics.) The relationship could be a matter of
historical connection with the subject or with related matters, or
of legal, commercial, philosophical, ethical or political position
regarding them.
The "Invariant Sections" are certain Secondary Sections whose
titles are designated, as being those of Invariant Sections, in the
notice that says that the Document is released under this License.
If a section does not fit the above definition of Secondary then it
is not allowed to be designated as Invariant. The Document may
contain zero Invariant Sections. If the Document does not identify
any Invariant Sections then there are none.
The "Cover Texts" are certain short passages of text that are
listed, as Front-Cover Texts or Back-Cover Texts, in the notice
that says that the Document is released under this License. A
Front-Cover Text may be at most 5 words, and a Back-Cover Text may
be at most 25 words.
A "Transparent" copy of the Document means a machine-readable copy,
represented in a format whose specification is available to the
general public, that is suitable for revising the document
straightforwardly with generic text editors or (for images composed
of pixels) generic paint programs or (for drawings) some widely
available drawing editor, and that is suitable for input to text
formatters or for automatic translation to a variety of formats
suitable for input to text formatters. A copy made in an otherwise
Transparent file format whose markup, or absence of markup, has
been arranged to thwart or discourage subsequent modification by
readers is not Transparent. An image format is not Transparent if
used for any substantial amount of text. A copy that is not
"Transparent" is called "Opaque".
Examples of suitable formats for Transparent copies include plain
ASCII without markup, Texinfo input format, LaTeX input format,
SGML or XML using a publicly available DTD, and standard-conforming
simple HTML, PostScript or PDF designed for human modification.
Examples of transparent image formats include PNG, XCF and JPG.
Opaque formats include proprietary formats that can be read and
edited only by proprietary word processors, SGML or XML for which
the DTD and/or processing tools are not generally available, and
the machine-generated HTML, PostScript or PDF produced by some word
processors for output purposes only.
The "Title Page" means, for a printed book, the title page itself,
plus such following pages as are needed to hold, legibly, the
material this License requires to appear in the title page. For
works in formats which do not have any title page as such, "Title
Page" means the text near the most prominent appearance of the
work's title, preceding the beginning of the body of the text.
The "publisher" means any person or entity that distributes copies
of the Document to the public.
A section "Entitled XYZ" means a named subunit of the Document
whose title either is precisely XYZ or contains XYZ in parentheses
following text that translates XYZ in another language. (Here XYZ
stands for a specific section name mentioned below, such as
"Acknowledgements", "Dedications", "Endorsements", or "History".)
To "Preserve the Title" of such a section when you modify the
Document means that it remains a section "Entitled XYZ" according
to this definition.
The Document may include Warranty Disclaimers next to the notice
which states that this License applies to the Document. These
Warranty Disclaimers are considered to be included by reference in
this License, but only as regards disclaiming warranties: any other
implication that these Warranty Disclaimers may have is void and
has no effect on the meaning of this License.
2. VERBATIM COPYING
You may copy and distribute the Document in any medium, either
commercially or noncommercially, provided that this License, the
copyright notices, and the license notice saying this License
applies to the Document are reproduced in all copies, and that you
add no other conditions whatsoever to those of this License. You
may not use technical measures to obstruct or control the reading
or further copying of the copies you make or distribute. However,
you may accept compensation in exchange for copies. If you
distribute a large enough number of copies you must also follow the
conditions in section 3.
You may also lend copies, under the same conditions stated above,
and you may publicly display copies.
3. COPYING IN QUANTITY
If you publish printed copies (or copies in media that commonly
have printed covers) of the Document, numbering more than 100, and
the Document's license notice requires Cover Texts, you must
enclose the copies in covers that carry, clearly and legibly, all
these Cover Texts: Front-Cover Texts on the front cover, and
Back-Cover Texts on the back cover. Both covers must also clearly
and legibly identify you as the publisher of these copies. The
front cover must present the full title with all words of the title
equally prominent and visible. You may add other material on the
covers in addition. Copying with changes limited to the covers, as
long as they preserve the title of the Document and satisfy these
conditions, can be treated as verbatim copying in other respects.
If the required texts for either cover are too voluminous to fit
legibly, you should put the first ones listed (as many as fit
reasonably) on the actual cover, and continue the rest onto
adjacent pages.
If you publish or distribute Opaque copies of the Document
numbering more than 100, you must either include a machine-readable
Transparent copy along with each Opaque copy, or state in or with
each Opaque copy a computer-network location from which the general
network-using public has access to download using public-standard
network protocols a complete Transparent copy of the Document, free
of added material. If you use the latter option, you must take
reasonably prudent steps, when you begin distribution of Opaque
copies in quantity, to ensure that this Transparent copy will
remain thus accessible at the stated location until at least one
year after the last time you distribute an Opaque copy (directly or
through your agents or retailers) of that edition to the public.
It is requested, but not required, that you contact the authors of
the Document well before redistributing any large number of copies,
to give them a chance to provide you with an updated version of the
Document.
4. MODIFICATIONS
You may copy and distribute a Modified Version of the Document
under the conditions of sections 2 and 3 above, provided that you
release the Modified Version under precisely this License, with the
Modified Version filling the role of the Document, thus licensing
distribution and modification of the Modified Version to whoever
possesses a copy of it. In addition, you must do these things in
the Modified Version:
A. Use in the Title Page (and on the covers, if any) a title
distinct from that of the Document, and from those of previous
versions (which should, if there were any, be listed in the
History section of the Document). You may use the same title
as a previous version if the original publisher of that
version gives permission.
B. List on the Title Page, as authors, one or more persons or
entities responsible for authorship of the modifications in
the Modified Version, together with at least five of the
principal authors of the Document (all of its principal
authors, if it has fewer than five), unless they release you
from this requirement.
C. State on the Title page the name of the publisher of the
Modified Version, as the publisher.
D. Preserve all the copyright notices of the Document.
E. Add an appropriate copyright notice for your modifications
adjacent to the other copyright notices.
F. Include, immediately after the copyright notices, a license
notice giving the public permission to use the Modified
Version under the terms of this License, in the form shown in
the Addendum below.
G. Preserve in that license notice the full lists of Invariant
Sections and required Cover Texts given in the Document's
license notice.
H. Include an unaltered copy of this License.
I. Preserve the section Entitled "History", Preserve its Title,
and add to it an item stating at least the title, year, new
authors, and publisher of the Modified Version as given on the
Title Page. If there is no section Entitled "History" in the
Document, create one stating the title, year, authors, and
publisher of the Document as given on its Title Page, then add
an item describing the Modified Version as stated in the
previous sentence.
J. Preserve the network location, if any, given in the Document
for public access to a Transparent copy of the Document, and
likewise the network locations given in the Document for
previous versions it was based on. These may be placed in the
"History" section. You may omit a network location for a work
that was published at least four years before the Document
itself, or if the original publisher of the version it refers
to gives permission.
K. For any section Entitled "Acknowledgements" or "Dedications",
Preserve the Title of the section, and preserve in the section
all the substance and tone of each of the contributor
acknowledgements and/or dedications given therein.
L. Preserve all the Invariant Sections of the Document, unaltered
in their text and in their titles. Section numbers or the
equivalent are not considered part of the section titles.
M. Delete any section Entitled "Endorsements". Such a section
may not be included in the Modified Version.
N. Do not retitle any existing section to be Entitled
"Endorsements" or to conflict in title with any Invariant
Section.
O. Preserve any Warranty Disclaimers.
If the Modified Version includes new front-matter sections or
appendices that qualify as Secondary Sections and contain no
material copied from the Document, you may at your option designate
some or all of these sections as invariant. To do this, add their
titles to the list of Invariant Sections in the Modified Version's
license notice. These titles must be distinct from any other
section titles.
You may add a section Entitled "Endorsements", provided it contains
nothing but endorsements of your Modified Version by various
parties--for example, statements of peer review or that the text
has been approved by an organization as the authoritative
definition of a standard.
You may add a passage of up to five words as a Front-Cover Text,
and a passage of up to 25 words as a Back-Cover Text, to the end of
the list of Cover Texts in the Modified Version. Only one passage
of Front-Cover Text and one of Back-Cover Text may be added by (or
through arrangements made by) any one entity. If the Document
already includes a cover text for the same cover, previously added
by you or by arrangement made by the same entity you are acting on
behalf of, you may not add another; but you may replace the old
one, on explicit permission from the previous publisher that added
the old one.
The author(s) and publisher(s) of the Document do not by this
License give permission to use their names for publicity for or to
assert or imply endorsement of any Modified Version.
5. COMBINING DOCUMENTS
You may combine the Document with other documents released under
this License, under the terms defined in section 4 above for
modified versions, provided that you include in the combination all
of the Invariant Sections of all of the original documents,
unmodified, and list them all as Invariant Sections of your
combined work in its license notice, and that you preserve all
their Warranty Disclaimers.
The combined work need only contain one copy of this License, and
multiple identical Invariant Sections may be replaced with a single
copy. If there are multiple Invariant Sections with the same name
but different contents, make the title of each such section unique
by adding at the end of it, in parentheses, the name of the
original author or publisher of that section if known, or else a
unique number. Make the same adjustment to the section titles in
the list of Invariant Sections in the license notice of the
combined work.
In the combination, you must combine any sections Entitled
"History" in the various original documents, forming one section
Entitled "History"; likewise combine any sections Entitled
"Acknowledgements", and any sections Entitled "Dedications". You
must delete all sections Entitled "Endorsements."
6. COLLECTIONS OF DOCUMENTS
You may make a collection consisting of the Document and other
documents released under this License, and replace the individual
copies of this License in the various documents with a single copy
that is included in the collection, provided that you follow the
rules of this License for verbatim copying of each of the documents
in all other respects.
You may extract a single document from such a collection, and
distribute it individually under this License, provided you insert
a copy of this License into the extracted document, and follow this
License in all other respects regarding verbatim copying of that
document.
7. AGGREGATION WITH INDEPENDENT WORKS
A compilation of the Document or its derivatives with other
separate and independent documents or works, in or on a volume of a
storage or distribution medium, is called an "aggregate" if the
copyright resulting from the compilation is not used to limit the
legal rights of the compilation's users beyond what the individual
works permit. When the Document is included in an aggregate, this
License does not apply to the other works in the aggregate which
are not themselves derivative works of the Document.
If the Cover Text requirement of section 3 is applicable to these
copies of the Document, then if the Document is less than one half
of the entire aggregate, the Document's Cover Texts may be placed
on covers that bracket the Document within the aggregate, or the
electronic equivalent of covers if the Document is in electronic
form. Otherwise they must appear on printed covers that bracket
the whole aggregate.
8. TRANSLATION
Translation is considered a kind of modification, so you may
distribute translations of the Document under the terms of section
4. Replacing Invariant Sections with translations requires special
permission from their copyright holders, but you may include
translations of some or all Invariant Sections in addition to the
original versions of these Invariant Sections. You may include a
translation of this License, and all the license notices in the
Document, and any Warranty Disclaimers, provided that you also
include the original English version of this License and the
original versions of those notices and disclaimers. In case of a
disagreement between the translation and the original version of
this License or a notice or disclaimer, the original version will
prevail.
If a section in the Document is Entitled "Acknowledgements",
"Dedications", or "History", the requirement (section 4) to
Preserve its Title (section 1) will typically require changing the
actual title.
9. TERMINATION
You may not copy, modify, sublicense, or distribute the Document
except as expressly provided under this License. Any attempt
otherwise to copy, modify, sublicense, or distribute it is void,
and will automatically terminate your rights under this License.
However, if you cease all violation of this License, then your
license from a particular copyright holder is reinstated (a)
provisionally, unless and until the copyright holder explicitly and
finally terminates your license, and (b) permanently, if the
copyright holder fails to notify you of the violation by some
reasonable means prior to 60 days after the cessation.
Moreover, your license from a particular copyright holder is
reinstated permanently if the copyright holder notifies you of the
violation by some reasonable means, this is the first time you have
received notice of violation of this License (for any work) from
that copyright holder, and you cure the violation prior to 30 days
after your receipt of the notice.
Termination of your rights under this section does not terminate
the licenses of parties who have received copies or rights from you
under this License. If your rights have been terminated and not
permanently reinstated, receipt of a copy of some or all of the
same material does not give you any rights to use it.
10. FUTURE REVISIONS OF THIS LICENSE
The Free Software Foundation may publish new, revised versions of
the GNU Free Documentation License from time to time. Such new
versions will be similar in spirit to the present version, but may
differ in detail to address new problems or concerns. See
<
http://www.gnu.org/copyleft/>.
Each version of the License is given a distinguishing version
number. If the Document specifies that a particular numbered
version of this License "or any later version" applies to it, you
have the option of following the terms and conditions either of
that specified version or of any later version that has been
published (not as a draft) by the Free Software Foundation. If the
Document does not specify a version number of this License, you may
choose any version ever published (not as a draft) by the Free
Software Foundation. If the Document specifies that a proxy can
decide which future versions of this License can be used, that
proxy's public statement of acceptance of a version permanently
authorizes you to choose that version for the Document.
11. RELICENSING
"Massive Multiauthor Collaboration Site" (or "MMC Site") means any
World Wide Web server that publishes copyrightable works and also
provides prominent facilities for anybody to edit those works. A
public wiki that anybody can edit is an example of such a server.
A "Massive Multiauthor Collaboration" (or "MMC") contained in the
site means any set of copyrightable works thus published on the MMC
site.
"CC-BY-SA" means the Creative Commons Attribution-Share Alike 3.0
license published by Creative Commons Corporation, a not-for-profit
corporation with a principal place of business in San Francisco,
California, as well as future copyleft versions of that license
published by that same organization.
"Incorporate" means to publish or republish a Document, in whole or
in part, as part of another Document.
An MMC is "eligible for relicensing" if it is licensed under this
License, and if all works that were first published under this
License somewhere other than this MMC, and subsequently
incorporated in whole or in part into the MMC, (1) had no cover
texts or invariant sections, and (2) were thus incorporated prior
to November 1, 2008.
The operator of an MMC Site may republish an MMC contained in the
site under CC-BY-SA on the same site at any time before August 1,
2009, provided the MMC is eligible for relicensing.
ADDENDUM: How to use this License for your documents
====================================================
To use this License in a document you have written, include a copy of
the License in the document and put the following copyright and license
notices just after the title page:
Copyright (C) YEAR YOUR NAME.
Permission is granted to copy, distribute and/or modify this document
under the terms of the GNU Free Documentation License, Version 1.3
or any later version published by the Free Software Foundation;
with no Invariant Sections, no Front-Cover Texts, and no Back-Cover
Texts. A copy of the license is included in the section entitled ``GNU
Free Documentation License''.
If you have Invariant Sections, Front-Cover Texts and Back-Cover
Texts, replace the "with...Texts." line with this:
with the Invariant Sections being LIST THEIR TITLES, with
the Front-Cover Texts being LIST, and with the Back-Cover Texts
being LIST.
If you have Invariant Sections without Cover Texts, or some other
combination of the three, merge those two alternatives to suit the
situation.
If your document contains nontrivial examples of program code, we
recommend releasing these examples in parallel under your choice of free
software license, such as the GNU General Public License, to permit
their use in free software.
Tag Table:
Node: Top1164
Node: Annotations Overview2334
Node: Limitations4169
Node: Migrating to GDB/MI6758
Node: Server Prefix7145
Node: Value Annotations7803
Node: Frame Annotations11025
Node: Displays14970
Node: Prompting16005
Node: Errors17552
Node: Breakpoint Info18454
Node: Invalidation19683
Node: Annotations for Running20176
Node: Source Annotations21745
Node: Multi-threaded Apps22703
Node: GNU Free Documentation License23579
End Tag Table
Local Variables:
coding: utf-8
End:
