From 45ac276db3f6ee73f955254e5ef055c673b5fbb3 Mon Sep 17 00:00:00 2001 From: Joel Brobecker Date: Tue, 31 Mar 2009 16:51:02 +0000 Subject: [PATCH] * gdb.texinfo (Ada Tasks): Add documentation about task-specific breakpoints. (Set Breaks): Add reference to thread-specific and task-specific breakpoints. --- gdb/doc/ChangeLog | 7 ++++++ gdb/doc/gdb.texinfo | 57 +++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 64 insertions(+) diff --git a/gdb/doc/ChangeLog b/gdb/doc/ChangeLog index c015a4d1c20..147a099baec 100644 --- a/gdb/doc/ChangeLog +++ b/gdb/doc/ChangeLog @@ -1,3 +1,10 @@ +2009-03-31 Joel Brobecker + + * gdb.texinfo (Ada Tasks): Add documentation about task-specific + breakpoints. + (Set Breaks): Add reference to thread-specific and task-specific + breakpoints. + 2009-03-31 Joel Brobecker * gdb.texinfo (Ada Tasks): Remove the documentation about diff --git a/gdb/doc/gdb.texinfo b/gdb/doc/gdb.texinfo index a1c0b80965f..8b1467e3d7a 100644 --- a/gdb/doc/gdb.texinfo +++ b/gdb/doc/gdb.texinfo @@ -3051,6 +3051,11 @@ C@t{++}, a function name may refer to more than one possible place to break. @xref{Ambiguous Expressions,,Ambiguous Expressions}, for a discussion of that situation. +It is also possible to insert a breakpoint that will stop the program +only if a specific thread or a specific task hits that breakpoint. +@xref{Thread-Specific Breakpoints} and @ref{Ada Tasks} for more +information about this feature. + @item break When called without any arguments, @code{break} sets a breakpoint at the next instruction to be executed in the selected stack frame @@ -11750,6 +11755,58 @@ from the current task to the given task. #4 0x804aacc in un () at un.adb:5 @end smallexample +@item break @var{linespec} task @var{taskno} +@itemx break @var{linespec} task @var{taskno} if @dots{} +@cindex breakpoints and tasks, in Ada +@cindex task breakpoints, in Ada +@kindex break @dots{} task @var{taskno}@r{ (Ada)} +These commands are like the @code{break @dots{} thread @dots{}} +command (@pxref{Thread Stops}). +@var{linespec} specifies source lines, as described +in @ref{Specify Location}. + +Use the qualifier @samp{task @var{taskno}} with a breakpoint command +to specify that you only want @value{GDBN} to stop the program when a +particular Ada task reaches this breakpoint. @var{taskno} is one of the +numeric task identifiers assigned by @value{GDBN}, shown in the first +column of the @samp{info tasks} display. + +If you do not specify @samp{task @var{taskno}} when you set a +breakpoint, the breakpoint applies to @emph{all} tasks of your +program. + +You can use the @code{task} qualifier on conditional breakpoints as +well; in this case, place @samp{task @var{taskno}} before the +breakpoint condition (before the @code{if}). + +For example, + +@smallexample +@iftex +@leftskip=0.5cm +@end iftex +(@value{GDBP}) info tasks + ID TID P-ID Pri State Name + 1 140022020 0 15 Child Activation Wait main_task + 2 140045060 1 15 Accept/Select Wait t2 + 3 140044840 1 15 Runnable t1 +* 4 140056040 1 15 Runnable t3 +(@value{GDBP}) b 15 task 2 +Breakpoint 5 at 0x120044cb0: file test_task_debug.adb, line 15. +(@value{GDBP}) cont +Continuing. +task # 1 running +task # 2 running + +Breakpoint 5, test_task_debug () at test_task_debug.adb:15 +15 flush; +(@value{GDBP}) info tasks + ID TID P-ID Pri State Name + 1 140022020 0 15 Child Activation Wait main_task +* 2 140045060 1 15 Runnable t2 + 3 140044840 1 15 Runnable t1 + 4 140056040 1 15 Delay Sleep t3 +@end smallexample @end table @node Ada Tasks and Core Files -- 2.30.2