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Introduce new convenience variables $_gdb_major and $_gdb_minor

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gdb/ChangeLog:
2019-03-30  Eli Zaretskii  <eliz@gnu.org>

	* NEWS: Announce $_gdb_major and $_gdb_minor.

	* top.c (init_gdb_version_vars): New function.
	(gdb_init): Call init_gdb_version_vars.

gdb/testsuite/ChangeLog:
2019-03-30  Simon Marchi <simark@simark.ca>

	* gdb.base/default.exp: Add values for $_gdb_major and
	$_gdb_minor.

gdb/doc/ChangeLog:
2019-03-30  Eli Zaretskii  <eliz@gnu.org>

	* gdb.texinfo (Convenience Vars): Document $_gdb_major and
	$_gdb_minor.
This commit is contained in:
Eli Zaretskii 2019-03-30 12:58:33 +03:00
parent c6f03bce79
commit 7734102d6d
7 changed files with 64 additions and 13 deletions
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7
gdb/ChangeLog
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@ -1,3 +1,10 @@
2019-03-30 Eli Zaretskii <eliz@gnu.org>
* NEWS: Announce $_gdb_major and $_gdb_minor.
* top.c (init_gdb_version_vars): New function.
(gdb_init): Call init_gdb_version_vars.
2019-03-29 Tom Tromey <tromey@adacore.com>
* printcmd.c (_initialize_printcmd): Add usage lines. Update some

6
gdb/NEWS
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@ -3,6 +3,12 @@
*** Changes since GDB 8.3
* New built-in convenience variables $_gdb_major and $_gdb_minor
provide the GDB version. They are handy for conditionally using
features available only in or since specific GDB versions, in
scripts that should work error-free with many different versions,
such as in system-wide init files.
* GDB now supports Thread Local Storage (TLS) variables on several
FreeBSD architectures (amd64, i386, powerpc, riscv). Other
architectures require kernel changes. TLS is not yet supported for

5
gdb/doc/ChangeLog
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@ -1,3 +1,8 @@
2019-03-30 Eli Zaretskii <eliz@gnu.org>
* gdb.texinfo (Convenience Vars): Document $_gdb_major and
$_gdb_minor.
2019-03-26 Andrew Burgess <andrew.burgess@embecosm.com>
* python.texi (Pretty Printing API): Document use of None for the

13
gdb/doc/gdb.texinfo
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@ -11197,7 +11197,7 @@ For example, it will be empty before you execute the @code{run} command.
@vindex $_tlb@r{, convenience variable}
The variable @code{$_tlb} is automatically set when debugging
applications running on MS-Windows in native mode or connected to
gdbserver that supports the @code{qGetTIBAddr} request.
gdbserver that supports the @code{qGetTIBAddr} request.
@xref{General Query Packets}.
This variable contains the address of the thread information block.
@ -11211,6 +11211,17 @@ The thread number of the current thread. @xref{thread numbers}.
@item $_gthread
The global number of the current thread. @xref{global thread numbers}.
@item $_gdb_major
@itemx $_gdb_minor
@vindex $_gdb_major@r{, convenience variable}
@vindex $_gdb_minor@r{, convenience variable}
The major and minor version numbers of the running @value{GDBN}.
Development snapshots and pretest versions have their minor version
incremented by one; thus, @value{GDBN} pretest 9.11.90 will produce
the value 12 for @code{$_gdb_minor}. These variables allow you to
write scripts that work with different versions of @value{GDBN}
without errors caused by features unavailable in some of those
versions.
@end table
@node Convenience Funs

5
gdb/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2019-03-30 Simon Marchi <simark@simark.ca>
* gdb.base/default.exp: Add values for $_gdb_major and
$_gdb_minor.
2019-03-29 Tom Tromey <tromey@adacore.com>
* gdb.base/help.exp: Tighten apropos regexp.

2
gdb/testsuite/gdb.base/default.exp
View file

@ -602,6 +602,8 @@ set show_conv_list \
{$_probe_arg10 = <error: No frame selected>} \
{$_probe_arg11 = <error: No frame selected>} \
{$_isvoid = <internal function _isvoid>} \
{$_gdb_major = 8} \
{$_gdb_minor = 4} \
}
if ![skip_python_tests] {
append show_conv_list \

39
gdb/top.c
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@ -147,22 +147,22 @@ int server_command;
/* Timeout limit for response from target. */
/* The default value has been changed many times over the years. It
was originally 5 seconds. But that was thought to be a long time
/* The default value has been changed many times over the years. It
was originally 5 seconds. But that was thought to be a long time
to sit and wait, so it was changed to 2 seconds. That was thought
to be plenty unless the connection was going through some terminal
to be plenty unless the connection was going through some terminal
server or multiplexer or other form of hairy serial connection.
In mid-1996, remote_timeout was moved from remote.c to top.c and
In mid-1996, remote_timeout was moved from remote.c to top.c and
it began being used in other remote-* targets. It appears that the
default was changed to 20 seconds at that time, perhaps because the
Renesas E7000 ICE didn't always respond in a timely manner.
But if 5 seconds is a long time to sit and wait for retransmissions,
20 seconds is far worse. This demonstrates the difficulty of using
20 seconds is far worse. This demonstrates the difficulty of using
a single variable for all protocol timeouts.
As remote.c is used much more than remote-e7000.c, it was changed
As remote.c is used much more than remote-e7000.c, it was changed
back to 2 seconds in 1999. */
int remote_timeout = 2;
@ -188,9 +188,9 @@ int (*deprecated_ui_loop_hook) (int);
/* Called from print_frame_info to list the line we stopped in. */
void (*deprecated_print_frame_info_listing_hook) (struct symtab * s,
void (*deprecated_print_frame_info_listing_hook) (struct symtab * s,
int line,
int stopline,
int stopline,
int noerror);
/* Replaces most of query. */
@ -237,7 +237,7 @@ ptid_t (*deprecated_target_wait_hook) (ptid_t ptid,
/* Used by UI as a wrapper around command execution. May do various
things like enabling/disabling buttons, etc... */
void (*deprecated_call_command_hook) (struct cmd_list_element * c,
void (*deprecated_call_command_hook) (struct cmd_list_element * c,
const char *cmd, int from_tty);
/* Called when the current thread changes. Argument is thread id. */
@ -1339,8 +1339,9 @@ There is NO WARRANTY, to the extent permitted by law.");
resources online at:\n <http://www.gnu.org/software/gdb/documentation/>."));
fprintf_filtered (stream, "\n\n");
fprintf_filtered (stream, _("For help, type \"help\".\n"));
fprintf_filtered (stream, _("Type \"apropos word\" to search for \
commands related to \"word\"."));
fprintf_filtered (stream,
_("Type \"apropos word\" to search for commands \
related to \"word\"."));
}
/* Print the details of GDB build-time configuration. */
@ -1608,7 +1609,7 @@ quit_force (int *exit_arg, int from_tty)
undo_terminal_modifications_before_exit ();
/* An optional expression may be used to cause gdb to terminate with the
/* An optional expression may be used to cause gdb to terminate with the
value of that expression. */
if (exit_arg)
exit_code = *exit_arg;
@ -2002,6 +2003,17 @@ set_history_filename (const char *args,
history_filename, (char *) NULL);
}
static void
init_gdb_version_vars (void)
{
struct internalvar *major_version_var = create_internalvar ("_gdb_major");
struct internalvar *minor_version_var = create_internalvar ("_gdb_minor");
int vmajor = 0, vminor = 0, vrevision = 0;
sscanf (version, "%d.%d.%d", &vmajor, &vminor, &vrevision);
set_internalvar_integer (major_version_var, vmajor);
set_internalvar_integer (minor_version_var, vminor + (vrevision > 0));
}
static void
init_main (void)
{
@ -2206,4 +2218,7 @@ gdb_init (char *argv0)
prefix to be installed. Keep things simple and just do final
script initialization here. */
finish_ext_lang_initialization ();
/* Create $_gdb_major and $_gdb_minor convenience variables. */
init_gdb_version_vars ();
}