[rfa/target/doc] Print less with "set debug target 1"

[Daniel Jacobowitz <drow@false.org>]

This is something that's always bugged me.  I wanted to track a problem in
the testsuite using "set debug target 1", but the output was so incredibly
noisy (because of libthread_db) that everything timed out.  This patch
changes "set debug target 1" to only print the first line of a memory
transfer, and documents "set debug target 2" to print the whole thing.

Seem OK?

-- 
Daniel Jacobowitz
MontaVista Software                         Debian GNU/Linux Developer

2004-03-06  Daniel Jacobowitz  <drow@mvista.com>

	* target.c (debug_to_xfer_memory): If targetdebug is 1, don't
	print the whole transfer.

2004-03-06  Daniel Jacobowitz  <drow@mvista.com>

	* gdb.texinfo (Debugging Output): Document values for "set debug
	target".

Index: target.c
===================================================================
RCS file: /big/fsf/rsync/src-cvs/src/gdb/target.c,v
retrieving revision 1.70
diff -u -p -r1.70 target.c
--- target.c	19 Jan 2004 16:49:35 -0000	1.70
+++ target.c	6 Mar 2004 19:47:07 -0000
@@ -1829,8 +1829,6 @@ debug_to_xfer_memory (CORE_ADDR memaddr,
 		      (unsigned int) memaddr,	/* possable truncate long long */
 		      len, write ? "write" : "read", retval);
 
-
-
   if (retval > 0)
     {
       int i;
@@ -1839,7 +1837,15 @@ debug_to_xfer_memory (CORE_ADDR memaddr,
       for (i = 0; i < retval; i++)
 	{
 	  if ((((long) &(myaddr[i])) & 0xf) == 0)
-	    fprintf_unfiltered (gdb_stdlog, "\n");
+	    {
+	      if (targetdebug < 2 && i > 0)
+		{
+		  fprintf_unfiltered (gdb_stdlog, " ...");
+		  break;
+		}
+	      fprintf_unfiltered (gdb_stdlog, "\n");
+	    }
+	  
 	  fprintf_unfiltered (gdb_stdlog, " %02x", myaddr[i] & 0xff);
 	}
     }
Index: doc/gdb.texinfo
===================================================================
RCS file: /big/fsf/rsync/src-cvs/src/gdb/doc/gdb.texinfo,v
retrieving revision 1.199
diff -u -p -r1.199 gdb.texinfo
--- doc/gdb.texinfo	29 Feb 2004 02:57:24 -0000	1.199
+++ doc/gdb.texinfo	6 Mar 2004 23:04:55 -0000
@@ -13434,7 +13434,9 @@ info.
 @item set debug target
 Turns on or off display of @value{GDBN} target debugging info. This info
 includes what is going on at the target level of GDB, as it happens. The
-default is off.
+default is 0.  Set it to 1 to track events, and to 2 to also track the
+value of large memory transfers.  This flag must be set before connecting
+to the target or saying @code{run}.
 @kindex show debug target
 @item show debug target
 Displays the current state of displaying @value{GDBN} target debugging