[Bug gdb/26524] New: advance/until and multiple locations

["palves at redhat dot com" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=26524

            Bug ID: 26524
           Summary: advance/until and multiple locations
           Product: gdb
           Version: unknown
            Status: NEW
          Severity: normal
          Priority: P2
         Component: gdb
          Assignee: unassigned at sourceware dot org
          Reporter: palves at redhat dot com
  Target Milestone: ---

If you do "advance LINESPEC", and LINESPEC expands to more than one
location, GDB just errors out:

   if (sals.size () != 1)
     error (_("Couldn't get information on specified line."));

For example, advancing to a line in an inlined function, inlined three times:

 (gdb) b 21
 Breakpoint 1 at 0x55555555516f: advance.cc:21. (3 locations)
 (gdb) info breakpoints
 Num     Type           Disp Enb Address            What
 1       breakpoint     keep y   <MULTIPLE>
 1.1                         y   0x000055555555516f in inline_func at
advance.cc:21
 1.2                         y   0x000055555555517e in inline_func at
advance.cc:21
 1.3                         y   0x000055555555518d in inline_func at
advance.cc:21
 (gdb) advance 21
 Couldn't get information on specified line.
 (gdb)

Since, as the comment in gdb.base/advance.exp says, "advance <location>"
is really just syntactic sugar for "tbreak <location>;continue",
GDB should not assume <location> expands to a single sal, and should instead
insert a breakpoint at all the resolved locations.

Same issue with the "until" command, as it shares the implementation with
"advance".

Another case where you can end up with multiple sals is if you set a breakpoint
at an overloaded C++ function.

-- 
You are receiving this mail because:
You are on the CC list for the bug.