| Debugging with GDB: GDB/MI Miscellaneous Commands |
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Previous: GDB/MI Support Commands, Up: GDB/MI [Contents][Index]
-gdb-exit Command-gdb-exit
Exit GDB immediately.
Approximately corresponds to ‘quit’.
(gdb) -gdb-exit ^exit
-gdb-set Command-gdb-set
Set an internal GDB variable.
The corresponding GDB command is ‘set’.
(gdb) -gdb-set $foo=3 ^done (gdb)
-gdb-show Command-gdb-show
Show the current value of a GDB variable.
The corresponding GDB command is ‘show’.
(gdb) -gdb-show annotate ^done,value="0" (gdb)
-gdb-version Command-gdb-version
Show version information for GDB. Used mostly in testing.
The GDB equivalent is ‘show version’. GDB by default shows this information when you start an interactive session.
(gdb) -gdb-version ~GNU gdb 5.2.1 ~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 "--host=sparc-sun-solaris2.5.1 --target=ppc-eabi". ^done (gdb)
-list-thread-groups Command-list-thread-groups [ --available ] [ --recurse 1 ] [ group ... ]
Lists thread groups (see Thread groups). When a single thread group is passed as the argument, lists the children of that group. When several thread group are passed, lists information about those thread groups. Without any parameters, lists information about all top-level thread groups.
Normally, thread groups that are being debugged are reported. With the ‘--available’ option, GDB reports thread groups available on the target.
The output of this command may have either a ‘threads’ result or a ‘groups’ result. The ‘thread’ result has a list of tuples as value, with each tuple describing a thread (see GDB/MI Thread Information). The ‘groups’ result has a list of tuples as value, each tuple describing a thread group. If top-level groups are requested (that is, no parameter is passed), or when several groups are passed, the output always has a ‘groups’ result. The format of the ‘group’ result is described below.
To reduce the number of roundtrips it’s possible to list thread groups together with their children, by passing the ‘--recurse’ option and the recursion depth. Presently, only recursion depth of 1 is permitted. If this option is present, then every reported thread group will also include its children, either as ‘group’ or ‘threads’ field.
In general, any combination of option and parameters is permitted, with the following caveats:
The ‘groups’ result is a list of tuples, where each tuple may have the following fields:
id
Identifier of the thread group. This field is always present. The identifier is an opaque string; frontends should not try to convert it to an integer, even though it might look like one.
type
The type of the thread group. At present, only ‘process’ is a valid type.
pid
The target-specific process identifier. This field is only present for thread groups of type ‘process’ and only if the process exists.
exit-code
The exit code of this group’s last exited thread, formatted in octal. This field is only present for thread groups of type ‘process’ and only if the process is not running.
num_children
The number of children this thread group has. This field may be absent for an available thread group.
threads
This field has a list of tuples as value, each tuple describing a thread. It may be present if the ‘--recurse’ option is specified, and it’s actually possible to obtain the threads.
cores
This field is a list of integers, each identifying a core that one thread of the group is running on. This field may be absent if such information is not available.
executable
The name of the executable file that corresponds to this thread group. The field is only present for thread groups of type ‘process’, and only if there is a corresponding executable file.
gdb
-list-thread-groups
^done,groups=[{id="17",type="process",pid="yyy",num_children="2"}]
-list-thread-groups 17
^done,threads=[{id="2",target-id="Thread 0xb7e14b90 (LWP 21257)",
frame={level="0",addr="0xffffe410",func="__kernel_vsyscall",args=[]},state="running"},
{id="1",target-id="Thread 0xb7e156b0 (LWP 21254)",
frame={level="0",addr="0x0804891f",func="foo",args=[{name="i",value="10"}],
file="/tmp/a.c",fullname="/tmp/a.c",line="158"},state="running"}]]
-list-thread-groups --available
^done,groups=[{id="17",type="process",pid="yyy",num_children="2",cores=[1,2]}]
-list-thread-groups --available --recurse 1
^done,groups=[{id="17", types="process",pid="yyy",num_children="2",cores=[1,2],
threads=[{id="1",target-id="Thread 0xb7e14b90",cores=[1]},
{id="2",target-id="Thread 0xb7e14b90",cores=[2]}]},..]
-list-thread-groups --available --recurse 1 17 18
^done,groups=[{id="17", types="process",pid="yyy",num_children="2",cores=[1,2],
threads=[{id="1",target-id="Thread 0xb7e14b90",cores=[1]},
{id="2",target-id="Thread 0xb7e14b90",cores=[2]}]},...]
-info-os Command-info-os [ type ]
If no argument is supplied, the command returns a table of available operating-system-specific information types. If one of these types is supplied as an argument type, then the command returns a table of data of that type.
The types of information available depend on the target operating system.
The corresponding GDB command is ‘info os’.
When run on a GNU/Linux system, the output will look something like this:
gdb
-info-os
^done,OSDataTable={nr_rows="10",nr_cols="3",
hdr=[{width="10",alignment="-1",col_name="col0",colhdr="Type"},
{width="10",alignment="-1",col_name="col1",colhdr="Description"},
{width="10",alignment="-1",col_name="col2",colhdr="Title"}],
body=[item={col0="cpus",col1="Listing of all cpus/cores on the system",
col2="CPUs"},
item={col0="files",col1="Listing of all file descriptors",
col2="File descriptors"},
item={col0="modules",col1="Listing of all loaded kernel modules",
col2="Kernel modules"},
item={col0="msg",col1="Listing of all message queues",
col2="Message queues"},
item={col0="processes",col1="Listing of all processes",
col2="Processes"},
item={col0="procgroups",col1="Listing of all process groups",
col2="Process groups"},
item={col0="semaphores",col1="Listing of all semaphores",
col2="Semaphores"},
item={col0="shm",col1="Listing of all shared-memory regions",
col2="Shared-memory regions"},
item={col0="sockets",col1="Listing of all internet-domain sockets",
col2="Sockets"},
item={col0="threads",col1="Listing of all threads",
col2="Threads"}]
gdb
-info-os processes
^done,OSDataTable={nr_rows="190",nr_cols="4",
hdr=[{width="10",alignment="-1",col_name="col0",colhdr="pid"},
{width="10",alignment="-1",col_name="col1",colhdr="user"},
{width="10",alignment="-1",col_name="col2",colhdr="command"},
{width="10",alignment="-1",col_name="col3",colhdr="cores"}],
body=[item={col0="1",col1="root",col2="/sbin/init",col3="0"},
item={col0="2",col1="root",col2="[kthreadd]",col3="1"},
item={col0="3",col1="root",col2="[ksoftirqd/0]",col3="0"},
...
item={col0="26446",col1="stan",col2="bash",col3="0"},
item={col0="28152",col1="stan",col2="bash",col3="1"}]}
(gdb)
(Note that the MI output here includes a "Title" column that
does not appear in command-line info os; this column is useful
for MI clients that want to enumerate the types of data, such as in a
popup menu, but is needless clutter on the command line, and
info os omits it.)
-add-inferior Command-add-inferior
Creates a new inferior (see Inferiors and Programs). The created inferior is not associated with any executable. Such association may be established with the ‘-file-exec-and-symbols’ command (see GDB/MI File Commands). The command response has a single field, ‘inferior’, whose value is the identifier of the thread group corresponding to the new inferior.
gdb -add-inferior ^done,inferior="i3"
-interpreter-exec Command-interpreter-exec interpreter command
Execute the specified command in the given interpreter.
The corresponding GDB command is ‘interpreter-exec’.
(gdb) -interpreter-exec console "break main" &"During symbol reading, couldn't parse type; debugger out of date?.\n" &"During symbol reading, bad structure-type format.\n" ~"Breakpoint 1 at 0x8074fc6: file ../../src/gdb/main.c, line 743.\n" ^done (gdb)
-inferior-tty-set Command-inferior-tty-set /dev/pts/1
Set terminal for future runs of the program being debugged.
The corresponding GDB command is ‘set inferior-tty’ /dev/pts/1.
(gdb) -inferior-tty-set /dev/pts/1 ^done (gdb)
-inferior-tty-show Command-inferior-tty-show
Show terminal for future runs of program being debugged.
The corresponding GDB command is ‘show inferior-tty’.
(gdb) -inferior-tty-set /dev/pts/1 ^done (gdb) -inferior-tty-show ^done,inferior_tty_terminal="/dev/pts/1" (gdb)
-enable-timings Command-enable-timings [yes | no]
Toggle the printing of the wallclock, user and system times for an MI command as a field in its output. This command is to help frontend developers optimize the performance of their code. No argument is equivalent to ‘yes’.
No equivalent.
(gdb)
-enable-timings
^done
(gdb)
-break-insert main
^done,bkpt={number="1",type="breakpoint",disp="keep",enabled="y",
addr="0x080484ed",func="main",file="myprog.c",
fullname="/home/nickrob/myprog.c",line="73",thread-groups=["i1"],
times="0"},
time={wallclock="0.05185",user="0.00800",system="0.00000"}
(gdb)
-enable-timings no
^done
(gdb)
-exec-run
^running
(gdb)
*stopped,reason="breakpoint-hit",disp="keep",bkptno="1",thread-id="0",
frame={addr="0x080484ed",func="main",args=[{name="argc",value="1"},
{name="argv",value="0xbfb60364"}],file="myprog.c",
fullname="/home/nickrob/myprog.c",line="73"}
(gdb)
Previous: GDB/MI Support Commands, Up: GDB/MI [Contents][Index]