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This is another patch in my ongoing series to "split" objfile to share
more read-only data across inferiors. See
http://sourceware.org/gdb/wiki/ObjfileSplitting
When symbols are finally shared, there will be no back-link from the
symbol to its containing objfile, because there may be more than one
such objfile. So, all such back-links must be removed.
One hidden back-link is the msymbol_objfile function. Since
(eventually) a symbol may appear in more than one objfile, trying to
look up the objfile given just a symbol cannot work.
This patch removes msymbol_objfile in favor of using a bound minimal
symbol. It introduces a new function to make this conversion simpler
in some spots.
The bonus of this patch is that using msymbol_objfile is slower than
simply looking up the owning objfile in the first place.
Built and regtested on x86-64 Fedora 18.
* ada-exp.y (write_var_or_type): Use bound_minimal_symbol.
* ada-lang.c (ada_lookup_simple_minsym): Return
bound_minimal_symbol.
* ada-lang.h (ada_lookup_simple_minsym): Update.
* c-exp.y (variable): Use lookup_bound_minimal_symbol.
* f-exp.y (variable): Use lookup_bound_minimal_symbol.
* go-exp.y (variable): Use lookup_bound_minimal_symbol.
* jv-exp.y (push_expression_name): Use lookup_bound_minimal_symbol.
* m2-exp.y (variable): Use lookup_bound_minimal_symbol.
* minsyms.c (msymbol_objfile): Remove.
(lookup_minimal_symbol_internal): New function, from
lookup_minimal_symbol.
(lookup_minimal_symbol): Rewrite using
lookup_minimal_symbol_internal.
(lookup_bound_minimal_symbol): New function.
* minsyms.h (msymbol_objfile): Remove.
(lookup_bound_minimal_symbol): Declare.
* p-exp.y (variable): Use lookup_bound_minimal_symbol.
* parse.c (write_exp_msymbol): Change parameter to a
bound_minimal_symbol.
(write_dollar_variable): Use lookup_bound_minimal_symbol.
* parser-defs.h (write_exp_msymbol): Update.
* printcmd.c (address_info): Use lookup_bound_minimal_symbol.
* symfile.c (simple_read_overlay_table): Use
lookup_bound_minimal_symbol.
* symtab.c (skip_prologue_sal): Don't use msymbol_objfile.
(search_symbols): Likewise.
(print_msymbol_info): Take a bound_minimal_symbol argument.
(symtab_symbol_info, rbreak_command): Update.
* symtab.h (struct symbol_search) <msymbol>: Change type
to bound_minimal_symbol.
* valops.c (find_function_in_inferior): Use
lookup_bound_minimal_symbol.
* value.c (value_fn_field): Use lookup_bound_minimal_symbol.
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* dbxread.c (record_minimal_symbol): Update.
* elfread.c (record_minimal_symbol): Update.
* machoread.c (macho_symtab_add_minsym): Update.
* mdebugread.c (record_minimal_symbol, parse_partial_symbols):
Update.
* minsyms.c (prim_record_minimal_symbol): Update.
(prim_record_minimal_symbol_full): Remove 'bfd_section'
argument.
(prim_record_minimal_symbol_and_info): Likewise.
* minsyms.h (prim_record_minimal_symbol_full)
(prim_record_minimal_symbol_and_info): Update.
* symtab.c (allocate_symbol, initialize_symbol)
(allocate_template_symbol): Initialize SYMBOL_SECTION.
* xcoffread.c (record_minimal_symbol, scan_xcoff_symtab):
Update.
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(lookup_minimal_symbol_and_objfile): Return bound_minimal_symbol.
Remove objfile argument.
(lookup_minimal_symbol_by_pc_section, lookup_minimal_symbol_by_pc):
Return bound_minimal_symbol.
* minsyms.c (lookup_minimal_symbol_by_pc_1)
(lookup_minimal_symbol_by_pc_section, lookup_minimal_symbol_by_pc):
Return bound_minimal_symbol.
(in_gnu_ifunc_stub): Update.
(lookup_minimal_symbol_and_objfile): Return bound_minimal_symbol.
Remove 'objfile_p' argument.
(lookup_solib_trampoline_symbol_by_pc): Update.
* ada-tasks.c, amd64-windows-tdep.c, arm-tdep.c,
arm-wince-tdep.c, block.c, blockframe.c, breakpoint.c, btrace.c,
c-valprint.c, dwarf2loc.c, elfread.c, frame.c, frv-tdep.c,
glibc-tdep.c, gnu-v2-abi.c, gnu-v3-abi.c, hppa-hpux-tdep.c,
i386-tdep.c, ia64-tdep.c, infcall.c, infcmd.c, jit.c,
linux-fork.c, m32c-tdep.c, m68hc11-tdep.c, maint.c,
mips-tdep.c, p-valprint.c, parse.c, ppc-linux-tdep.c,
ppc-sysv-tdep.c, printcmd.c, rs6000-tdep.c, sh64-tdep.c,
stack.c, symtab.c, tui/tui-disasm.c: Update.
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Two modifications:
1. The addition of 2013 to the copyright year range for every file;
2. The use of a single year range, instead of potentially multiple
year ranges, as approved by the FSF.
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* minsyms.h (lookup_solib_trampoline_symbol_by_pc): Don't
declare.
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gdb/ChangeLog:
Copyright year update in most files of the GDB Project.
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* minsyms.c: Move some comments to minsyms.h.
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(prim_record_minimal_symbol, prim_record_minimal_symbol_full)
(prim_record_minimal_symbol_and_info, msymbol_hash_iw)
(msymbol_hash, SYMBOL_HASH_NEXT, msymbol_objfile)
(lookup_minimal_symbol, lookup_minimal_symbol_text)
(lookup_minimal_symbol_solib_trampoline)
(lookup_minimal_symbol_by_pc_name, lookup_minimal_symbol_by_pc)
(iterate_over_minimal_symbols, lookup_minimal_symbol_and_objfile)
(lookup_minimal_symbol_by_pc_section)
(lookup_solib_trampoline_symbol_by_pc)
(init_minimal_symbol_collection)
(make_cleanup_discard_minimal_symbols, install_minimal_symbols)
(msymbols_sort): Move to minsyms.h.
* objfiles.c (terminate_minimal_symbol_table): Move to minsyms.c.
* minsyms.c (terminate_minimal_symbol_table): Move from
objfiles.c.
* minsyms.h: New file.
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