[MI][patch] -break-list to specify "thread-group"

[Marc Khouzam <marc.khouzam@ericsson.com>]

Hi,

In Eclipse I'm trying to filter breakpoints per thread and/or
per process.  Currently -break-list does not tell me the inferior
of a bp as 'info break' does.

Currently:

(gdb) inf b
Num     Type           Disp Enb Address    What
1       breakpoint     keep y   <MULTIPLE> 
1.1                         y     0x08048533 in main() at loopfirst.cc:8 inf 2
1.2                         y     0x08048533 in main() at loopfirst.cc:8 inf 1

Notice the "inf 1" tag at the end.

(gdb) interpreter-exec mi -break-list
^done,BreakpointTable={nr_rows="1",nr_cols="6",hdr=[{width="7",alignment="-1",col_name="number",colhdr="Num"},{width="14",alignment="-1",col_name="type",colhdr="Type"},{width="4",alignment="-1",col_name="disp",colhdr="Disp"},{width="3",alignment="-1",col_name="enabled",colhdr="Enb"},{width="10",alignment="-1",col_name="addr",colhdr="Address"},{width="40",alignment="2",col_name="what",colhdr="What"}],body=[bkpt={number="1",type="breakpoint",disp="keep",enabled="y",addr="<MULTIPLE>",times="0",original-location="/home/lmckhou/testing/loopfirst.cc:8"},{number="1.1",enabled="y",addr="0x08048533",func="main()",file="loopfirst.cc",fullname="/home/lmckhou/testing/loopfirst.cc",line="8"},{number="1.2",enabled="y",addr="0x08048533",func="main()",file="loopfirst.cc",fullname="/home/lmckhou/testing/loopfirst.cc",line="8"}]}

but no such info from MI.

The below patch adds this new field.

The output would then look like:

(gdb) interpreter-exec mi -break-list
^done,BreakpointTable={nr_rows="1",nr_cols="6",hdr=[{width="7",alignment="-1",col_name="number",colhdr="Num"},{width="14",alignment="-1",col_name="type",colhdr="Type"},{width="4",alignment="-1",col_name="disp",colhdr="Disp"},{width="3",alignment="-1",col_name="enabled",colhdr="Enb"},{width="10",alignment="-1",col_name="addr",colhdr="Address"},{width="40",alignment="2",col_name="what",colhdr="What"}],body=[bkpt={number="1",type="breakpoint",disp="keep",enabled="y",addr="<MULTIPLE>",times="0",original-location="/home/lmckhou/testing/loopfirst.cc:8"},{number="1.1",enabled="y",addr="0x08048533",func="main()",file="loopfirst.cc",fullname="/home/lmckhou/testing/loopfirst.cc",line="8",thread-group=["2"]},{number="1.2",enabled="y",addr="0x08048533",func="main()",file="loopfirst.cc",fullname="/home/lmckhou/testing/loopfirst.cc",line="8",thread-group=["1"]}]}

or (if the bp applies to multiple inferiors, which I didn't quite
out how to officially trigger, so I hacked the code to make sure
the output was done properly in that case)

(gdb) interpreter-exec mi -break-list
^done,BreakpointTable={nr_rows="1",nr_cols="6",hdr=[{width="7",alignment="-1",col_name="number",colhdr="Num"},{width="14",alignment="-1",col_name="type",colhdr="Type"},{width="4",alignment="-1",col_name="disp",colhdr="Disp"},{width="3",alignment="-1",col_name="enabled",colhdr="Enb"},{width="10",alignment="-1",col_name="addr",colhdr="Address"},{width="40",alignment="2",col_name="what",colhdr="What"}],body=[bkpt={number="1",type="breakpoint",disp="keep",enabled="y",addr="<MULTIPLE>",times="0",original-location="loopfirst.cc:8"},{number="1.1",enabled="y",addr="0x08048533",func="main()",file="loopfirst.cc",fullname="/home/lmckhou/testing/loopfirst.cc",line="8",thread-group=["2","1"]},{number="1.2",enabled="y",addr="0x08048533",func="main()",file="loopfirst.cc",fullname="/home/lmckhou/testing/loopfirst.cc",line="8",thread-group=["2","1"]}]}


I was going to update the doc, but when I looked at it 
I realized it was completely out-of-date with respect to 
-break-list _and_ that the MI output itself does not to have 
the right content in the  'hdr' part.  I wasn't sure if I can 
change such MI output or not due to backwards
compatibility.

Can this patch go in as is?  Or can I get some guidance 
about how to handle this out-of-date MI output?

Thanks

Marc


2012-09-20  Marc Khouzam  <marc.khouzam@ericsson.com>

	* breakpoint.c (print_one_breakpoint_location): Add MI
	field 'thread-group' to output of -break-list.
	(output_thread_groups): New function.


### Eclipse Workspace Patch 1.0
#P src
Index: gdb/breakpoint.c
===================================================================
RCS file: /cvs/src/src/gdb/breakpoint.c,v
retrieving revision 1.704
diff -u -r1.704 breakpoint.c
--- gdb/breakpoint.c    17 Sep 2012 07:03:14 -0000      1.704
+++ gdb/breakpoint.c    21 Sep 2012 09:50:03 -0000
@@ -5779,6 +5779,36 @@
   return bptypes[(int) type].description;
 }
 
+/* Output a field named 'thread-group' with a list as the value.  The
+   elements of the list are obtained by splitting 'groups' on
+   comma.  */
+
+static void 
+output_thread_groups (struct ui_out *uiout, const char *field_name, const char *xgroups)
+{
+  struct cleanup *back_to = make_cleanup_ui_out_list_begin_end (uiout,
+                                                               field_name);
+  char *groups = xstrdup (xgroups);
+  char *p = groups;
+  int first = 1;
+
+  make_cleanup (xfree, groups);
+
+  for (p = strtok (p, ","); p;  p = strtok (NULL, ","))
+    {
+      if (first)
+       {
+         first = 0;
+         ui_out_text (uiout, " inf ");
+       }
+      else
+       ui_out_text (uiout, ", ");
+      ui_out_field_string (uiout, NULL, p);
+    }
+
+  do_cleanups (back_to);
+}
+
 /* Print B to gdb_stdout.  */
 
 static void
@@ -5944,21 +5974,27 @@
     {
       struct inferior *inf;
       int first = 1;
+      char thread_groups[100]; 
+      const char *inf_name;
+      int len;
 
+      thread_groups[0] = 0;
       for (inf = inferior_list; inf != NULL; inf = inf->next)
        {
          if (inf->pspace == loc->pspace)
            {
              if (first)
-               {
-                 first = 0;
-                 ui_out_text (uiout, " inf ");
-               }
+               first = 0;
              else
-               ui_out_text (uiout, ", ");
-             ui_out_text (uiout, plongest (inf->num));
+               strncat (thread_groups, ",", len);
+
+             inf_name = plongest (inf->num);
+             len = strlen (inf_name);
+             strncat (thread_groups, inf_name, len);
            }
        }
+       output_thread_groups (uiout, "thread-group", thread_groups);
+
     }
 
   if (!part_of_multiple)