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Use a single, consistent representation for an empty minimal

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symbol table in an objfile.
* objfiles.c (terminate_minimal_symbol_table): New function.
(allocate_objfile): Call it.
* objfiles.h (terminate_minimal_symbol_table): New declaration.
(ALL_MSYMBOLS): No need to test whether (objfile)->msymbols is
non-NULL.
* minsyms.c (lookup_minimal_symbol_by_pc_section): To see whether
objfile has minimal symbols, compare minimal_symbol_count to zero,
instead of comparing msymbols with NULL.
* objfiles.c (have_minimal_symbols): Same.
* solib-sunos.c (solib_add_common_symbols): Call
terminate_minimal_symbol_table.
* symfile.c (reread_symbols): Same.
This commit is contained in:
Jim Blandy 2003-02-03 20:39:41 +00:00
parent ffc65945ba
commit 158314526c
6 changed files with 54 additions and 4 deletions
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17
gdb/ChangeLog
View file

@ -1,3 +1,20 @@
2003-02-03 Jim Blandy <jimb@redhat.com>
Use a single, consistent representation for an empty minimal
symbol table in an objfile.
* objfiles.c (terminate_minimal_symbol_table): New function.
(allocate_objfile): Call it.
* objfiles.h (terminate_minimal_symbol_table): New declaration.
(ALL_MSYMBOLS): No need to test whether (objfile)->msymbols is
non-NULL.
* minsyms.c (lookup_minimal_symbol_by_pc_section): To see whether
objfile has minimal symbols, compare minimal_symbol_count to zero,
instead of comparing msymbols with NULL.
* objfiles.c (have_minimal_symbols): Same.
* solib-sunos.c (solib_add_common_symbols): Call
terminate_minimal_symbol_table.
* symfile.c (reread_symbols): Same.
2003-02-03 Kevin Buettner <kevinb@redhat.com>
* s390-tdep.c (s390_address_class_type_flags)

3
gdb/minsyms.c
View file

@ -411,8 +411,9 @@ lookup_minimal_symbol_by_pc_section (CORE_ADDR pc, asection *section)
"null symbol". If there are no real symbols, then there is no
minimal symbol table at all. */
if ((msymbol = objfile->msymbols) != NULL)
if (objfile->minimal_symbol_count > 0)
{
msymbol = objfile->msymbols;
lo = 0;
hi = objfile->minimal_symbol_count - 1;

31
gdb/objfiles.c
View file

@ -281,6 +281,8 @@ allocate_objfile (bfd *abfd, int flags)
obstack_specify_allocation (&objfile->type_obstack, 0, 0, xmalloc,
xfree);
flags &= ~OBJF_MAPPED;
terminate_minimal_symbol_table (objfile);
}
/* Update the per-objfile information that comes from the bfd, ensuring
@ -333,6 +335,33 @@ allocate_objfile (bfd *abfd, int flags)
return (objfile);
}
/* Create the terminating entry of OBJFILE's minimal symbol table.
If OBJFILE->msymbols is zero, allocate a single entry from
OBJFILE->symbol_obstack; otherwise, just initialize
OBJFILE->msymbols[OBJFILE->minimal_symbol_count]. */
void
terminate_minimal_symbol_table (struct objfile *objfile)
{
if (! objfile->msymbols)
objfile->msymbols = ((struct minimal_symbol *)
obstack_alloc (&objfile->symbol_obstack,
sizeof (objfile->msymbols[0])));
{
struct minimal_symbol *m
= &objfile->msymbols[objfile->minimal_symbol_count];
memset (m, 0, sizeof (*m));
SYMBOL_NAME (m) = NULL;
SYMBOL_VALUE_ADDRESS (m) = 0;
MSYMBOL_INFO (m) = NULL;
MSYMBOL_TYPE (m) = mst_unknown;
SYMBOL_INIT_LANGUAGE_SPECIFIC (m, language_unknown);
}
}
/* Put one object file before a specified on in the global list.
This can be used to make sure an object file is destroyed before
another when using ALL_OBJFILES_SAFE to free all objfiles. */
@ -810,7 +839,7 @@ have_minimal_symbols (void)
ALL_OBJFILES (ofp)
{
if (ofp->msymbols != NULL)
if (ofp->minimal_symbol_count > 0)
{
return 1;
}

3
gdb/objfiles.h
View file

@ -515,6 +515,8 @@ extern struct objfile *allocate_objfile (bfd *, int);
extern int build_objfile_section_table (struct objfile *);
extern void terminate_minimal_symbol_table (struct objfile *objfile);
extern void put_objfile_before (struct objfile *, struct objfile *);
extern void objfile_to_front (struct objfile *);
@ -595,7 +597,6 @@ extern int is_in_import_list (char *, struct objfile *);
#define ALL_MSYMBOLS(objfile, m) \
ALL_OBJFILES (objfile) \
if ((objfile)->msymbols) \
ALL_OBJFILE_MSYMBOLS (objfile, m)
#define ALL_OBJFILE_OSECTIONS(objfile, osect) \

1
gdb/solib-sunos.c
View file

@ -184,6 +184,7 @@ solib_add_common_symbols (CORE_ADDR rtc_symp)
xmalloc, xfree);
rt_common_objfile->minimal_symbol_count = 0;
rt_common_objfile->msymbols = NULL;
terminate_minimal_symbol_table (rt_common_objfile);
}
init_minimal_symbol_collection ();

1
gdb/symfile.c
View file

@ -2019,6 +2019,7 @@ reread_symbols (void)
error ("Can't find the file sections in `%s': %s",
objfile->name, bfd_errmsg (bfd_get_error ()));
}
terminate_minimal_symbol_table (objfile);
/* We use the same section offsets as from last time. I'm not
sure whether that is always correct for shared libraries. */