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Add a new $_inferior convenience variable

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Like $_thread, but holds the current inferior number.

gdb/ChangeLog:
2016-01-13  Pedro Alves  <palves@redhat.com>

	* NEWS: Mention $_inferior.
	* inferior.c (inferior_id_make_value): New.
	(inferior_funcs): New.
	(_initialize_inferior): Create $_inferior variable.

gdb/testsuite/ChangeLog:
2016-01-13  Pedro Alves  <palves@redhat.com>

	* gdb.base/default.exp: Expect $_inferior as well.
	* gdb.multi/base.exp: Test $_inferior.

gdb/doc/ChangeLog:
2016-01-13  Pedro Alves  <palves@redhat.com>

	* gdb.texinfo (Inferiors and Programs): Document the $_inferior
	convenience variable.
	(Convenience Vars): Likewise.
This commit is contained in:
Pedro Alves 2016-01-13 10:56:05 +00:00
parent a911d87ad7
commit e3940304fe
8 changed files with 57 additions and 0 deletions
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6
gdb/doc/ChangeLog
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@ -1,3 +1,9 @@
2016-01-13 Pedro Alves <palves@redhat.com>
* gdb.texinfo (Inferiors and Programs): Document the $_inferior
convenience variable.
(Convenience Vars): Likewise.
2016-01-12 Josh Stone <jistone@redhat.com>
Philippe Waroquiers <philippe.waroquiers@skynet.be>

10
gdb/doc/gdb.texinfo
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@ -2658,6 +2658,12 @@ Make inferior number @var{infno} the current inferior. The argument
in the first field of the @samp{info inferiors} display.
@end table
@vindex $_inferior@r{, convenience variable}
The debugger convenience variable @samp{$_inferior} contains the
number of the current inferior. You may find this useful in writing
breakpoint conditional expressions, command scripts, and so forth.
@xref{Convenience Vars,, Convenience Variables}, for general
information on convenience variables.
You can get multiple executables into a debugging session via the
@code{add-inferior} and @w{@code{clone-inferior}} commands. On some
@ -10382,6 +10388,10 @@ gdbserver that supports the @code{qGetTIBAddr} request.
@xref{General Query Packets}.
This variable contains the address of the thread information block.
@item $_inferior
The number of the current inferior. @xref{Inferiors and
Programs, ,Debugging Multiple Inferiors and Programs}.
@end table
@node Convenience Funs