[PATCH] Symbol Separation

[Devang Patel <dpatel at apple dot com>]

Reference :

http://gcc.gnu.org/ml/gcc-patches/2003-07/msg00130.html
http://gcc.gnu.org/ml/gcc/2003-02/msg00170.html

I bootstrapped on powerpc-darwin. GCC dejagnu tests does
not reveal new regressions.

OK to commit ?
Thank you,
-Devang

[ If approved, I'll bootstrap and run dejagnu test on linux-i686
  before committing this patch]

 2003-07-11  Devang Patel  <dpatel@apple.com>

        * cppss.c : New file.
        * Makefile.in (LIBCPP_OBJS): Add cppss.o
        (cppss.o): Add.
        * c-common.c (cb_restore_write_symbols): New function.
        (cb_clear_write_symbols): Same.
        (cb_start_symbol_repository): Same.
        (cb_end_symbol_repository): Same.
        (cinfo_outdir): New.
        (cinfo_file): New.
        * c-common.h (cinfo_file): New.
        * c-lex.c (init_c_lex): Init call backs for symbol separation.
        * c-objc-common.c (c_common_write_context): New function.
        (c_objc_common_finish_file): Write context info for symbol
        separation.
        * c-opts.c (OPT__output_pch_): Set make_pch.
        (OPT_Winvalid_sr): New.
        (c_common_parse_file): Check availablility of symbol repository
        for main input file. Also initialize symbol separation.
        * c.opt (Winvalid-sr): New.
        * common.opt (fsave-repository): New.
        * cppfiles.c (struct include_file): New member - suppress_dbg.
        (open_file_pch): Find and validate .cinfo.
        (stack_include_file): If valid symbol repository is found then
        suppress debug info by clearing write_symbols.
        (suppress_dbg_info): New function.
        (cpp_check_symbol_repository): New function.
        * cpphash.h (enum cpp_cinfo_state): New.
        (struct cpp_reader): New member - cinfo_state.
        * cpplib.c (_cpp_pop_buffer): If debug info. was suppressed for
        the buffer being popped then restore original status.
        * cpplib.h (struct cpp_options): New members - make_pch, use_ss
        and warn_invalid_sr.
        * cpppch.c (count_defs): Do not count builtins for symbol
        separation.
        (write_defs): Do not write builtins for symbol separation.
        (cpp_valid_state): Issue appropriate warning, when -Winvalid-sr 
is set.
        * dbxout.c (struct gcc_debug_hooks): New four hooks --
        dbxout_restore_write_symbols, dbxout_clear_write_symbols,
        dbxout_start_symbol_repository and dbxout_end_symbol_repository.
        (dbxout_restore_write_symbols): New function.
        (dbxout_clear_write_symbols): New function.
        (dbxout_start_symbol_repository): New function.
        (dbxout_end_symbol_repository): New function.
        (dbxout_start_source_file): Add write_symbols check.
        (dbxout_end_source_file): Same.
        * debug.c (struct gcc_debug_hooks): Four new hooks.
        (debug_nothing_charstar_long): New.
        * debug.h (struct gcc_debug_hooks): For new hooks.
        * flags.h (orig_write_symbols): New.
        (flag_grepository): New.
        (cinfo_outdier): New.
        * gcc.c (pch): New.
        (dbg_ss): New.
        (asm_options): Check -fsave-repository.
        (static_specs): Add pch and dbg_ss.
        * opts.c (OPT_fsave_repository_): New.
        * toplev.c (orig_write_symbols): New.
        (flag_grepository): New.
        (decode_g_option): Decode -grepository.

        doc
        * invoke.texi: Document -fsave-repository and -grepository

        testsuite:
        gcc.dg/ss/ss.exp: New file.
        gcc.dg/ss/README: New file.
        gcc.dg/ss/one.c: New test.
        gcc.dg/ss/one.ssh: New file.
        gcc.dg/ss/ss-cmd1.c: New test.

Attachment: cppss.c
Description: Text document

Attachment: ss.diff
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Attachment: README
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Attachment: ss.exp
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Attachment: one.c
Description: Text document

Attachment: one.ssh
Description: Binary data

Attachment: ss-cmd1.c
Description: Text document