[Bug symtab/15035] New: Excessive symtab expansion setting abreakpoint on foo::bar.

["dje at google dot com" <sourceware-bugzilla at sourceware dot org>]

http://sourceware.org/bugzilla/show_bug.cgi?id=15035

             Bug #: 15035
           Summary: Excessive symtab expansion setting a breakpoint on
                    foo::bar.
           Product: gdb
           Version: HEAD
            Status: NEW
          Severity: normal
          Priority: P2
         Component: symtab
        AssignedTo: unassigned@sourceware.org
        ReportedBy: dje@google.com
    Classification: Unclassified


I haven't looked into the psymtab side, but when using .gdb_index and doing

(gdb) b (anonymous namespace)::foo

gdb will first expand every CU/TU (dwarf) that defines anonymous namespace, and
only after that will it look for foo.
However, the symbol table in .gdb_index has an entry for (anonymous
namespace)::foo. The data is there to tell gdb precisely which CUs to expand.
Seems like the index isn't being fully utilitized here.

In a large app there could be 2k such CUs (or more), and setting a breakpoint
takes way too long (long enough that I give up after a minute and haven't put
in the effort to compute the actual number).

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