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* NEWS: Add entry for stdio gdbserver.

Browse Source 
gdbserver/
	* linux-low.c (linux_create_inferior): If stdio connection,
	redirect stdin from /dev/null, stdout to stderr.
	* remote-utils.c (remote_is_stdio): New static global.
	(remote_connection_is_stdio): New function.
	(remote_prepare): Handle stdio connection.
	(remote_open): Ditto.
	(remote_close): Don't close stdin for stdio connections.
	(read_prim,write_prim): New functions.  Replace all calls to
	read/write to these.
	* server.c (main): Watch for "-" argument.  Move call to
	remote_prepare before start_inferior.
	* server.h (STDIO_CONNECTION_NAME): New macro.
	(remote_connection_is_stdio): Declare.

	doc/
	* gdb.texinfo (Server): Document -/stdio argument to gdbserver.

	testsuite/
	* lib/gdbserver-support.exp (gdb_target_cmd): Recognize stdio
	gdbserver output.
	(gdbserver_default_get_remote_address): New function.
	(gdbserver_start): Call gdb,get_remote_address to compute argument
	to "target remote" command.
This commit is contained in:
Doug Evans
2011-12-16 19:06:38 +00:00
parent e77616d77a
commit e0f9f06220
10 changed files with 166 additions and 23 deletions
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4
gdb/doc/ChangeLog
View File

@ -1,3 +1,7 @@
2011-12-16 Doug Evans <dje@google.com>
* gdb.texinfo (Server): Document -/stdio argument to gdbserver.
2011-12-16 Phil Muldoon <pmuldoon@redhat.com>
* gdb.texinfo (Python Commands): Remove "maint set/show print

23
gdb/doc/gdb.texinfo
View File

@ -16766,8 +16766,10 @@ syntax is:
target> gdbserver @var{comm} @var{program} [ @var{args} @dots{} ]
@end smallexample
@var{comm} is either a device name (to use a serial line) or a TCP
hostname and portnumber. For example, to debug Emacs with the argument
@var{comm} is either a device name (to use a serial line), or a TCP
hostname and portnumber, or @code{-} or @code{stdio} to use
stdin/stdout of @code{gdbserver}.
For example, to debug Emacs with the argument
@samp{foo.txt} and communicate with @value{GDBN} over the serial port
@file{/dev/com1}:
@ -16796,6 +16798,23 @@ conflicts with another service, @code{gdbserver} prints an error message
and exits.} You must use the same port number with the host @value{GDBN}
@code{target remote} command.
The @code{stdio} connection is useful when starting @code{gdbserver}
with ssh:
@smallexample
(gdb) target remote | ssh -T hostname gdbserver - hello
@end smallexample
The @samp{-T} option to ssh is provided because we don't need a remote pty,
and we don't want escape-character handling. Ssh does this by default when
a command is provided, the flag is provided to make it explicit.
You could elide it if you want to.
Programs started with stdio-connected gdbserver have @file{/dev/null} for
@code{stdin}, and @code{stdout},@code{stderr} are sent back to gdb for
display through a pipe connected to gdbserver.
Both @code{stdout} and @code{stderr} use the same pipe.
@subsubsection Attaching to a Running Program
@cindex attach to a program, @code{gdbserver}
@cindex @option{--attach}, @code{gdbserver} option