[Bug symtab/14125] New: Performance issue with .gdb_index and largenumbers of shared libs

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

http://sourceware.org/bugzilla/show_bug.cgi?id=14125

             Bug #: 14125
           Summary: Performance issue with .gdb_index and large numbers of
                    shared libs
           Product: gdb
           Version: HEAD
            Status: NEW
          Severity: normal
          Priority: P2
         Component: symtab
        AssignedTo: unassigned@sourceware.org
        ReportedBy: dje@google.com
    Classification: Unclassified


When .gdb_index is in use there isn't a bit that specifies GLOBAL_BLOCK vs
STATIC_BLOCK, so if something is in STATIC_BLOCK (say "int") it matches so gdb
will expand the symbol table, but the match doesn't take into account the block
kind. So gdb will proceed to expand one symbol table from every objfile looking
for "int" in GLOBAL_BLOCK, finding it, but not using it.
Only after that is done will GDB try STATIC_BLOCK.
In a large enough app (e.g., >1000 shared libs) this is painful.

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