Remove minsym termination
I was curious what used the terminating "null" minimal symbol; and after looking I could not find anything. This patch removes terminate_minimal_symbol_table and the extra minimal symbol that is allocated for it. gdb/ChangeLog 2019-03-15 Tom Tromey <tom@tromey.com> * symfile.c (reread_symbols): Update. * objfiles.c (objfile::objfile): Update. * minsyms.h (terminate_minimal_symbol_table): Don't declare. * minsyms.c (lookup_minimal_symbol_by_pc_section): Update comment. (minimal_symbol_reader::install): Update. (terminate_minimal_symbol_table): Remove. * jit.c (jit_object_close_impl): Update.
This commit is contained in:
Tom Tromey
parent
788c80d1af
commit
741d7538b7
|
|
@ -1,3 +1,14 @@
|
|||
2019-03-15 Tom Tromey <tom@tromey.com>
|
||||
|
||||
* symfile.c (reread_symbols): Update.
|
||||
* objfiles.c (objfile::objfile): Update.
|
||||
* minsyms.h (terminate_minimal_symbol_table): Don't declare.
|
||||
* minsyms.c (lookup_minimal_symbol_by_pc_section): Update
|
||||
comment.
|
||||
(minimal_symbol_reader::install): Update.
|
||||
(terminate_minimal_symbol_table): Remove.
|
||||
* jit.c (jit_object_close_impl): Update.
|
||||
|
||||
2019-03-15 Tom Tromey <tom@tromey.com>
|
||||
|
||||
* minsyms.c (minimal_symbol_reader::record_full): Remove some
|
||||
|
|
|
|||
|
|
@ -805,8 +805,6 @@ jit_object_close_impl (struct gdb_symbol_callbacks *cb,
|
|||
OBJF_NOT_FILENAME);
|
||||
objfile->per_bfd->gdbarch = target_gdbarch ();
|
||||
|
||||
terminate_minimal_symbol_table (objfile);
|
||||
|
||||
j = NULL;
|
||||
for (i = obj->symtabs; i; i = j)
|
||||
{
|
||||
|
|
|
|||
|
|
@ -735,11 +735,8 @@ lookup_minimal_symbol_by_pc_section (CORE_ADDR pc_in, struct obj_section *sectio
|
|||
{
|
||||
CORE_ADDR pc = pc_in;
|
||||
|
||||
/* If this objfile has a minimal symbol table, go search it using
|
||||
a binary search. Note that a minimal symbol table always consists
|
||||
of at least two symbols, a "real" symbol and the terminating
|
||||
"null symbol". If there are no real symbols, then there is no
|
||||
minimal symbol table at all. */
|
||||
/* If this objfile has a minimal symbol table, go search it
|
||||
using a binary search. */
|
||||
|
||||
if (objfile->per_bfd->minimal_symbol_count > 0)
|
||||
{
|
||||
|
|
@ -1363,7 +1360,7 @@ minimal_symbol_reader::install ()
|
|||
compact out the duplicate entries. Once we have a final table,
|
||||
we will give back the excess space. */
|
||||
|
||||
alloc_count = m_msym_count + m_objfile->per_bfd->minimal_symbol_count + 1;
|
||||
alloc_count = m_msym_count + m_objfile->per_bfd->minimal_symbol_count;
|
||||
obstack_blank (&m_objfile->per_bfd->storage_obstack,
|
||||
alloc_count * sizeof (struct minimal_symbol));
|
||||
msymbols = (struct minimal_symbol *)
|
||||
|
|
@ -1406,16 +1403,6 @@ minimal_symbol_reader::install ()
|
|||
msymbols = (struct minimal_symbol *)
|
||||
obstack_finish (&m_objfile->per_bfd->storage_obstack);
|
||||
|
||||
/* We also terminate the minimal symbol table with a "null symbol",
|
||||
which is *not* included in the size of the table. This makes it
|
||||
easier to find the end of the table when we are handed a pointer
|
||||
to some symbol in the middle of it. Zero out the fields in the
|
||||
"null symbol" allocated at the end of the array. Note that the
|
||||
symbol count does *not* include this null symbol, which is why it
|
||||
is indexed by mcount and not mcount-1. */
|
||||
|
||||
memset (&msymbols[mcount], 0, sizeof (struct minimal_symbol));
|
||||
|
||||
/* Attach the minimal symbol table to the specified objfile.
|
||||
The strings themselves are also located in the storage_obstack
|
||||
of this objfile. */
|
||||
|
|
@ -1431,27 +1418,6 @@ minimal_symbol_reader::install ()
|
|||
}
|
||||
}
|
||||
|
||||
/* See minsyms.h. */
|
||||
|
||||
void
|
||||
terminate_minimal_symbol_table (struct objfile *objfile)
|
||||
{
|
||||
if (! objfile->per_bfd->msymbols)
|
||||
objfile->per_bfd->msymbols = XOBNEW (&objfile->per_bfd->storage_obstack,
|
||||
minimal_symbol);
|
||||
|
||||
{
|
||||
struct minimal_symbol *m
|
||||
= &objfile->per_bfd->msymbols[objfile->per_bfd->minimal_symbol_count];
|
||||
|
||||
memset (m, 0, sizeof (*m));
|
||||
/* Don't rely on these enumeration values being 0's. */
|
||||
MSYMBOL_TYPE (m) = mst_unknown;
|
||||
MSYMBOL_SET_LANGUAGE (m, language_unknown,
|
||||
&objfile->per_bfd->storage_obstack);
|
||||
}
|
||||
}
|
||||
|
||||
/* Check if PC is in a shared library trampoline code stub.
|
||||
Return minimal symbol for the trampoline entry or NULL if PC is not
|
||||
in a trampoline code stub. */
|
||||
|
|
|
|||
|
|
@ -148,13 +148,6 @@ class minimal_symbol_reader
|
|||
int m_msym_count;
|
||||
};
|
||||
|
||||
/* Create the terminating entry of OBJFILE's minimal symbol table.
|
||||
If OBJFILE->msymbols is zero, allocate a single entry from
|
||||
OBJFILE->objfile_obstack; otherwise, just initialize
|
||||
OBJFILE->msymbols[OBJFILE->minimal_symbol_count]. */
|
||||
|
||||
void terminate_minimal_symbol_table (struct objfile *objfile);
|
||||
|
||||
|
||||
|
||||
/* Return whether MSYMBOL is a function/method. If FUNC_ADDRESS_P is
|
||||
|
|
|
|||
|
|
@ -411,8 +411,6 @@ objfile::objfile (bfd *abfd, const char *name, objfile_flags flags_)
|
|||
|
||||
per_bfd = get_objfile_bfd_data (this, abfd);
|
||||
|
||||
terminate_minimal_symbol_table (this);
|
||||
|
||||
/* Add this file onto the tail of the linked list of other such files. */
|
||||
|
||||
if (object_files == NULL)
|
||||
|
|
|
|||
|
|
@ -2580,7 +2580,6 @@ reread_symbols (void)
|
|||
objfile_set_sym_fns (objfile, find_sym_fns (objfile->obfd));
|
||||
|
||||
build_objfile_section_table (objfile);
|
||||
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. */
|
||||
|
|
|
|||
Loading…
Reference in New Issue