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[Bug gold/13577] Gold linker does not respect --dynamic-list option

From: cvs-commit at gcc dot gnu.org
Subject: [Bug gold/13577] Gold linker does not respect --dynamic-list option
Date: Thu, 06 Feb 2014 02:03:21 +0000


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commit fd834e57ffce2f5dbe3443f034e68cebd63ee89a
Author: Cary Coutant <address@hidden>
Date:   Wed Feb 5 14:01:52 2014 -0800

    Fix problems with the --dynamic-list option.

    PR gold/13577 complains that even though symbols listed in
    the --dynamic-list script are exported, they are still bound symbolically
    if -Bsymbolic is also used. There are two underlying problems here.
    First, -Bsymbolic should be overridden by --dynamic-list, since the
    dynamic list provides an explicit list of symbols that are not bound
    within the library, and if we go ahead and set DT_SYMBOLIC, then the
    dynamic loader will bind it within the library anyway. Second, gold
    did not properly identify the symbols listed in the file as preemptible.

    PR gold/16530 complains that symbols listed in the --dynamic-list script
    can still be garbage collected. I've fixed this by checking the symbols
    as they're added to the symbol table. (Unlike the --export-dynamic-symbol
    option, we can't iterate over the list, because the --dynamic-list script
    can have wildcards in it.)


    2014-02-05  Cary Coutant  <address@hidden>

        PR gold/13577
        * options.cc (General_options::parse_dynamic_list):
        Set have_dynamic_list_.
        (General_options::General_options): Initialize have_dynamic_list_.
        (General_options::finalize): Turn off -Bsymbolic and
        -Bsymbolic-functions if --dynamic-list provided.
        * options.h (General_options::have_dynamic_list): New function.
        (General_options::have_dynamic_list_): New data member.
        * symtab.h (Symbol::is_preemptible): Handle --dynamic-list

        PR gold/16530
        * symtab.cc (Symbol_table::add_from_relobj): If symbol is named
        in --dynamic-list, mark it.

        * testsuite/Makefile.am (gc_dynamic_list_test.sh): New test case.
        (dynamic_list_2): New test case.
        * testsuite/Makefile.in: Regenerate.
        * testsuite/dynamic_list_2.cc: New file.
        * testsuite/dynamic_list_2.t: New file.
        * testsuite/dynamic_list_lib1.cc: New file.
        * testsuite/dynamic_list_lib2.cc: New file.
        * testsuite/gc_dynamic_list_test.c: New file.
        * testsuite/gc_dynamic_list_test.sh: New file.
        * testsuite/gc_dynamic_list_test.t: New file.


Summary of changes:
 gold/options.cc                        |    9 ++++++
 gold/options.h                         |    7 ++++
 gold/symtab.cc                         |    3 +-
 gold/symtab.h                          |   10 +++++-
 gold/testsuite/Makefile.am             |   26 +++++++++++++++++
 gold/testsuite/Makefile.in             |   47 ++++++++++++++++++++++++++++--
 gold/testsuite/dynamic_list_2.cc       |   40 ++++++++++++++++++++++++++
 gold/testsuite/dynamic_list_2.t        |   27 +++++++++++++++++
 gold/testsuite/dynamic_list_lib1.cc    |   37 ++++++++++++++++++++++++
 gold/testsuite/dynamic_list_lib2.cc    |   49 ++++++++++++++++++++++++++++++++
 gold/testsuite/gc_dynamic_list_test.c  |   34 ++++++++++++++++++++++
 gold/testsuite/gc_dynamic_list_test.sh |   39 +++++++++++++++++++++++++
 gold/testsuite/gc_dynamic_list_test.t  |   25 ++++++++++++++++
 13 files changed, 347 insertions(+), 6 deletions(-)
 create mode 100644 gold/testsuite/dynamic_list_2.cc
 create mode 100644 gold/testsuite/dynamic_list_2.t
 create mode 100644 gold/testsuite/dynamic_list_lib1.cc
 create mode 100644 gold/testsuite/dynamic_list_lib2.cc
 create mode 100644 gold/testsuite/gc_dynamic_list_test.c
 create mode 100755 gold/testsuite/gc_dynamic_list_test.sh
 create mode 100644 gold/testsuite/gc_dynamic_list_test.t

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