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Document 'set print frame-info|frame-arguments presence'.

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gdb/ChangeLog
2019-06-19  Philippe Waroquiers  <philippe.waroquiers@skynet.be>

	* NEWS: Mention 'set|show print frame-info'.  Mention new
	'presence' value for 'frame-arguments'.  Mention new '-frame-info'
	backtrace argument.  Mention that python frame filtering code
	is now consistent with what 'backtrace' command prints.

gdb/doc/ChangeLog
2019-07-29  Philippe Waroquiers  <philippe.waroquiers@skynet.be>

	* gdb.texinfo (Backtrace): Document the new '-frame-info'
	backtrace option.  Reference 'set print frame-info'.
	(Print Settings): Document 'set|show print frame-info'.
	Document new 'presence' value for 'set print frame-arguments.
This commit is contained in:
Philippe Waroquiers 2019-05-04 23:48:36 +02:00
parent c7e4c0a648
commit bc4268a5d9
4 changed files with 93 additions and 3 deletions
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7
gdb/ChangeLog
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@ -1,3 +1,10 @@
2019-07-29 Philippe Waroquiers <philippe.waroquiers@skynet.be>
* NEWS: Mention 'set|show print frame-info'. Mention new
'presence' value for 'frame-arguments'. Mention new '-frame-info'
backtrace argument. Mention that python frame filtering code
is now consistent with what 'backtrace' command prints.
2019-07-29 Philippe Waroquiers <philippe.waroquiers@skynet.be>
* frame.h (enum print_what): New value 'SHORT_LOCATION', update

19
gdb/NEWS
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@ -36,6 +36,11 @@
** gdb.Type has a new property 'objfile' which returns the objfile the
type was defined in.
** The frame information printed by the python frame filtering code
is now consistent with what the 'backtrace' command prints when
there are no filters, or when the 'backtrace' '-no-filters' option
is given.
* New commands
| [COMMAND] | SHELL_COMMAND
@ -104,6 +109,14 @@ maint show test-settings KIND
A set of commands used by the testsuite for exercising the settings
infrastructure.
set print frame-info [short-location|location|location-and-address
|source-and-location|source-line|auto]
show print frame-info
This controls what frame information is printed by the commands printing
a frame. This setting will e.g. influence the behaviour of 'backtrace',
'frame', 'stepi'. The python frame filtering also respect this setting.
The 'backtrace' '-frame-info' option can override this global setting.
* Changed commands
help
@ -130,6 +143,10 @@ show style
a style name in their output using its own style, to help
the user visualize the different styles.
set print frame-arguments
The new value 'presence' indicates to only indicate the presence of
arguments using ..., instead of printing argument names and values.
set print raw-frame-arguments
show print raw-frame-arguments
@ -184,6 +201,8 @@ maint show test-options-completion-result
-entry-values no|only|preferred|if-needed|both|compact|default
-frame-arguments all|scalars|none
-raw-frame-arguments [on|off]
-frame-info auto|source-line|location|source-and-location
|location-and-address|short-location
-past-main [on|off]
-past-entry [on|off]

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gdb/doc/ChangeLog
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@ -1,3 +1,10 @@
2019-07-29 Philippe Waroquiers <philippe.waroquiers@skynet.be>
* gdb.texinfo (Backtrace): Document the new '-frame-info'
backtrace option. Reference 'set print frame-info'.
(Print Settings): Document 'set|show print frame-info'.
Document new 'presence' value for 'set print frame-arguments.
2019-07-22 Andrew Burgess <andrew.burgess@embecosm.com>
* gdb.texinfo (Symbols): Add information about -q flag to "info

63
gdb/doc/gdb.texinfo
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@ -7806,6 +7806,10 @@ Related setting: @ref{set print frame-arguments}.
@item -raw-frame-arguments [@code{on}|@code{off}]
Set whether to print frame arguments in raw form.
Related setting: @ref{set print raw-frame-arguments}.
@item -frame-info @code{auto}|@code{source-line}|@code{location}|@code{source-and-location}|@code{location-and-address}|@code{short-location}
Set printing of frame information.
Related setting: @ref{set print frame-info}.
@end table
The optional @var{qualifier} is maintained for backward compatibility.
@ -7870,6 +7874,8 @@ The value of parameter @code{data} in frame 1 has been replaced by
only if it is a scalar (integer, pointer, enumeration, etc). See command
@kbd{set print frame-arguments} in @ref{Print Settings} for more details
on how to configure the way function parameter values are printed.
The command @kbd{set print frame-info} (@pxref{Print Settings}) controls
what frame information is printed.
@cindex optimized out, in backtrace
@cindex function call arguments, optimized out
@ -10816,7 +10822,7 @@ If the number is 0, then the printing is unlimited.
@cindex printing frame argument values
@cindex print all frame argument values
@cindex print frame argument values for scalars only
@cindex do not print frame argument values
@cindex do not print frame arguments
This command allows to control how the values of arguments are printed
when the debugger prints a frame (@pxref{Frames}). The possible
values are:
@ -10844,6 +10850,17 @@ is replaced by @code{@dots{}}. In this case, the example above now becomes:
#1 0x08048361 in call_me (i=@dots{}, s=@dots{}, ss=@dots{}, u=@dots{}, e=@dots{})
at frame-args.c:23
@end smallexample
@item presence
Only the presence of arguments is indicated by @code{@dots{}}.
The @code{@dots{}} are not printed for function without any arguments.
None of the argument names and values are printed.
In this case, the example above now becomes:
@smallexample
#1 0x08048361 in call_me (@dots{}) at frame-args.c:23
@end smallexample
@end table
By default, only scalar arguments are printed. This command can be used
@ -10854,8 +10871,8 @@ information printed in each frame, making the backtrace more readable.
Also, it improves performance when displaying Ada frames, because
the computation of large arguments can sometimes be CPU-intensive,
especially in large applications. Setting @code{print frame-arguments}
to @code{scalars} (the default) or @code{none} avoids this computation,
thus speeding up the display of each Ada frame.
to @code{scalars} (the default), @code{none} or @code{presence} avoids
this computation, thus speeding up the display of each Ada frame.
@item show print frame-arguments
Show how the value of arguments should be displayed when printing a frame.
@ -10988,6 +11005,46 @@ entry resolution see @ref{set debug entry-values}.
Show the method being used for printing of frame argument values at function
entry.
@anchor{set print frame-info}
@item set print frame-info @var{value}
@kindex set print frame-info
@cindex printing frame information
@cindex frame information, printing
This command allows to control the information printed when
the debugger prints a frame. See @ref{Frames}, @ref{Backtrace},
for a general explanation about frames and frame information.
Note that some other settings (such as @code{set print frame-arguments}
and @code{set print address}) are also influencing if and how some frame
information is displayed. In particular, the frame program counter is never
printed if @code{set print address} is off.
The possible values for @code{set print frame-info} are:
@table @code
@item short-location
Print the frame level, the program counter (if not at the
beginning of the location source line), the function, the function
arguments.
@item location
Same as @code{short-location} but also print the source file and source line
number.
@item location-and-address
Same as @code{location} but print the program counter even if located at the
beginning of the location source line.
@item source-line
Print the program counter (if not at the beginning of the location
source line), the line number and the source line.
@item source-and-location
Print what @code{location} and @code{source-line} are printing.
@item auto
The information printed for a frame is decided automatically
by the @value{GDBN} command that prints a frame.
For example, @code{frame} prints the information printed by
@code{source-and-location} while @code{stepi} will switch between
@code{source-line} and @code{source-and-location} depending on the program
counter.
The default value is @code{auto}.
@end table
@anchor{set print repeats}
@item set print repeats @var{number-of-repeats}
@itemx set print repeats unlimited