[Bug breakpoints/15185] New: Dprintf should parse its string forvalidity right away

["marc.khouzam at ericsson dot com" <sourceware-bugzilla at sourceware dot org>]

http://sourceware.org/bugzilla/show_bug.cgi?id=15185

             Bug #: 15185
           Summary: Dprintf should parse its string for validity right
                    away
           Product: gdb
           Version: HEAD
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: breakpoints
        AssignedTo: unassigned@sourceware.org
        ReportedBy: marc.khouzam@ericsson.com
    Classification: Unclassified


No evaluation of the dprintf string is done by GDB.  This can be quite poor for
the user since it is only at run-time that an error will be given.

I think that a checking the expression early would much more user-friendly.


> gdb.7.6 ~/loopfirst
GNU gdb (GDB) 7.5.50.20130223-cvs
(gdb) dprintf 8,"hello$d",i
Dprintf 1 at 0x804855f: file loopfirst.cc, line 8.
(gdb) r
Starting program: /home/lmckhou/loopfirst 
warning: Cannot call inferior functions, you have broken Linux kernel i386 NX
(non-executable pages) support!
hellofriend
Wrong number of arguments for specified format-string
(gdb) bt
#0  main () at loopfirst.cc:8

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