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2010-01-06 Tristan Gingold <gingold@adacore.com>

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* symtab.c (lookup_global_symbol_from_objfile): Rename objfile
	parameter to main_objfile.  Iterate on all separate debug objfiles.
	* symfile.h (symbol_file_add_separate)
	(find_separate_debug_file_by_debuglink): Remove parameter names.
	* symfile.c (symbol_file_add_separate): Use add_separate_objfile.
	(reread_symbols): Use free_objfile_separate_debug.
	* objfiles.h (struct objfile): Add separate_debug_objfile_link.
	Adjust comment.
	(objfile_separate_debug_iterate, add_separate_debug_objfile)
	(free_objfile_separate_debug): New prototypes.
	* objfiles.c (objfile_separate_debug_iterate): New function.
	(add_separate_debug_objfile, free_objfile_separate_debug): New
	functions.
	(free_objfile): Use free_objfile_separate_debug.  Adjust for
	multiple separate debug objfile.
	(objfile_has_symbols): Adjust comment.  Iterate on all separate
	debug objfiles.
	* minsyms.c (lookup_minimal_symbol): Adjust for multiple separate
	debug objfile.
	(lookup_minimal_symbol_text): Ditto.
	(lookup_minimal_symbol_by_pc_name): Ditto.
	(lookup_minimal_symbol_solib_trampoline): Ditto.
	(lookup_minimal_symbol_by_pc_section_1): Iterate on all separate
	debug objfiles.
This commit is contained in:
Tristan Gingold 2010-01-06 10:11:04 +00:00
parent d2ca6b5b42
commit 15d123c99f
7 changed files with 199 additions and 82 deletions
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27
gdb/ChangeLog
View File

@ -1,3 +1,30 @@
2010-01-06 Tristan Gingold <gingold@adacore.com>
* symtab.c (lookup_global_symbol_from_objfile): Rename objfile
parameter to main_objfile. Iterate on all separate debug objfiles.
* symfile.h (symbol_file_add_separate)
(find_separate_debug_file_by_debuglink): Remove parameter names.
* symfile.c (symbol_file_add_separate): Use add_separate_objfile.
(reread_symbols): Use free_objfile_separate_debug.
* objfiles.h (struct objfile): Add separate_debug_objfile_link.
Adjust comment.
(objfile_separate_debug_iterate, add_separate_debug_objfile)
(free_objfile_separate_debug): New prototypes.
* objfiles.c (objfile_separate_debug_iterate): New function.
(add_separate_debug_objfile, free_objfile_separate_debug): New
functions.
(free_objfile): Use free_objfile_separate_debug. Adjust for
multiple separate debug objfile.
(objfile_has_symbols): Adjust comment. Iterate on all separate
debug objfiles.
* minsyms.c (lookup_minimal_symbol): Adjust for multiple separate
debug objfile.
(lookup_minimal_symbol_text): Ditto.
(lookup_minimal_symbol_by_pc_name): Ditto.
(lookup_minimal_symbol_solib_trampoline): Ditto.
(lookup_minimal_symbol_by_pc_section_1): Iterate on all separate
debug objfiles.
2010-01-05 Stan Shebs <stan@codesourcery.com>
Add fast tracepoints.

15
gdb/minsyms.c
View File

@ -216,7 +216,7 @@ lookup_minimal_symbol (const char *name, const char *sfile,
objfile = objfile->next)
{
if (objf == NULL || objf == objfile
|| objf->separate_debug_objfile == objfile)
|| objf == objfile->separate_debug_objfile_backlink)
{
/* Do two passes: the first over the ordinary hash table,
and the second over the demangled hash table. */
@ -324,7 +324,7 @@ lookup_minimal_symbol_text (const char *name, struct objfile *objf)
objfile = objfile->next)
{
if (objf == NULL || objf == objfile
|| objf->separate_debug_objfile == objfile)
|| objf == objfile->separate_debug_objfile_backlink)
{
for (msymbol = objfile->msymbol_hash[hash];
msymbol != NULL && found_symbol == NULL;
@ -377,7 +377,7 @@ lookup_minimal_symbol_by_pc_name (CORE_ADDR pc, const char *name,
objfile = objfile->next)
{
if (objf == NULL || objf == objfile
|| objf->separate_debug_objfile == objfile)
|| objf == objfile->separate_debug_objfile_backlink)
{
for (msymbol = objfile->msymbol_hash[hash];
msymbol != NULL;
@ -416,7 +416,7 @@ lookup_minimal_symbol_solib_trampoline (const char *name,
objfile = objfile->next)
{
if (objf == NULL || objf == objfile
|| objf->separate_debug_objfile == objfile)
|| objf == objfile->separate_debug_objfile_backlink)
{
for (msymbol = objfile->msymbol_hash[hash];
msymbol != NULL && found_symbol == NULL;
@ -473,11 +473,10 @@ lookup_minimal_symbol_by_pc_section_1 (CORE_ADDR pc,
no telling which one will have the minimal symbols. */
gdb_assert (section != NULL);
objfile = section->objfile;
if (objfile->separate_debug_objfile)
objfile = objfile->separate_debug_objfile;
for (; objfile != NULL; objfile = objfile->separate_debug_objfile_backlink)
for (objfile = section->objfile;
objfile != NULL;
objfile = objfile_separate_debug_iterate (section->objfile, objfile))
{
/* If this objfile has a minimal symbol table, go search it using
a binary search. Note that a minimal symbol table always consists

124
gdb/objfiles.c
View File

@ -378,6 +378,42 @@ terminate_minimal_symbol_table (struct objfile *objfile)
}
}
/* Iterator on PARENT and every separate debug objfile of PARENT.
The usage pattern is:
for (objfile = parent;
objfile;
objfile = objfile_separate_debug_iterate (parent, objfile))
...
*/
struct objfile *
objfile_separate_debug_iterate (const struct objfile *parent,
const struct objfile *objfile)
{
struct objfile *res;
res = objfile->separate_debug_objfile;
if (res)
return res;
res = objfile->separate_debug_objfile_link;
if (res)
return res;
/* Common case where there is no separate debug objfile. */
if (objfile == parent)
return NULL;
for (res = objfile->separate_debug_objfile_backlink;
res != parent;
res = res->separate_debug_objfile_backlink)
{
gdb_assert (res != NULL);
if (res->separate_debug_objfile_link)
return res->separate_debug_objfile_link;
}
return NULL;
}
/* 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
@ -455,6 +491,41 @@ unlink_objfile (struct objfile *objfile)
_("unlink_objfile: objfile already unlinked"));
}
/* Add OBJFILE as a separate debug objfile of PARENT. */
void
add_separate_debug_objfile (struct objfile *objfile, struct objfile *parent)
{
gdb_assert (objfile && parent);
/* Must not be already in a list. */
gdb_assert (objfile->separate_debug_objfile_backlink == NULL);
gdb_assert (objfile->separate_debug_objfile_link == NULL);
objfile->separate_debug_objfile_backlink = parent;
objfile->separate_debug_objfile_link = parent->separate_debug_objfile;
parent->separate_debug_objfile = objfile;
/* Put the separate debug object before the normal one, this is so that
usage of the ALL_OBJFILES_SAFE macro will stay safe. */
put_objfile_before (objfile, parent);
}
/* Free all separate debug objfile of OBJFILE, but don't free OBJFILE
itself. */
void
free_objfile_separate_debug (struct objfile *objfile)
{
struct objfile *child;
for (child = objfile->separate_debug_objfile; child;)
{
struct objfile *next_child = child->separate_debug_objfile_link;
free_objfile (child);
child = next_child;
}
}
/* Destroy an objfile and all the symtabs and psymtabs under it. Note
that as much as possible is allocated on the objfile_obstack
@ -475,16 +546,38 @@ unlink_objfile (struct objfile *objfile)
void
free_objfile (struct objfile *objfile)
{
if (objfile->separate_debug_objfile)
{
free_objfile (objfile->separate_debug_objfile);
}
/* Free all separate debug objfiles. */
free_objfile_separate_debug (objfile);
if (objfile->separate_debug_objfile_backlink)
{
/* We freed the separate debug file, make sure the base objfile
doesn't reference it. */
objfile->separate_debug_objfile_backlink->separate_debug_objfile = NULL;
struct objfile *child;
child = objfile->separate_debug_objfile_backlink->separate_debug_objfile;
if (child == objfile)
{
/* OBJFILE is the first child. */
objfile->separate_debug_objfile_backlink->separate_debug_objfile =
objfile->separate_debug_objfile_link;
}
else
{
/* Find OBJFILE in the list. */
while (1)
{
if (child->separate_debug_objfile_link == objfile)
{
child->separate_debug_objfile_link =
objfile->separate_debug_objfile_link;
break;
}
child = child->separate_debug_objfile_link;
gdb_assert (child);
}
}
}
/* Remove any references to this objfile in the global value
@ -778,25 +871,16 @@ objfile_has_full_symbols (struct objfile *objfile)
}
/* Return non-zero if OBJFILE has full or partial symbols, either directly
or throught its separate debug file. */
or through a separate debug file. */
int
objfile_has_symbols (struct objfile *objfile)
{
struct objfile *separate_objfile;
if (objfile_has_partial_symbols (objfile)
|| objfile_has_full_symbols (objfile))
return 1;
separate_objfile = objfile->separate_debug_objfile;
if (separate_objfile == NULL)
return 0;
if (objfile_has_partial_symbols (separate_objfile)
|| objfile_has_full_symbols (separate_objfile))
return 1;
struct objfile *o;
for (o = objfile; o; o = objfile_separate_debug_iterate (objfile, o))
if (objfile_has_partial_symbols (o) || objfile_has_full_symbols (o))
return 1;
return 0;
}

25
gdb/objfiles.h
View File

@ -363,15 +363,25 @@ struct objfile
struct obj_section
*sections, *sections_end;
/* Link to objfile that contains the debug symbols for this one.
One is loaded if this file has an debug link to an existing
debug file with the right checksum */
/* GDB allows to have debug symbols in separate object files. This is
used by .gnu_debuglink, ELF build id note and Mach-O OSO.
Although this is a tree structure, GDB only support one level
(ie a separate debug for a separate debug is not supported). Note that
separate debug object are in the main chain and therefore will be
visited by ALL_OBJFILES & co iterators. Separate debug objfile always
has a non-nul separate_debug_objfile_backlink. */
/* Link to the first separate debug object, if any. */
struct objfile *separate_debug_objfile;
/* If this is a separate debug object, this is used as a link to the
actual executable objfile. */
struct objfile *separate_debug_objfile_backlink;
/* If this is a separate debug object, this is a link to the next one
for the same executable objfile. */
struct objfile *separate_debug_objfile_link;
/* Place to stash various statistics about this objfile */
OBJSTATS;
@ -452,14 +462,21 @@ extern int build_objfile_section_table (struct objfile *);
extern void terminate_minimal_symbol_table (struct objfile *objfile);
extern struct objfile *objfile_separate_debug_iterate (const struct objfile *,
const struct objfile *);
extern void put_objfile_before (struct objfile *, struct objfile *);
extern void objfile_to_front (struct objfile *);
extern void add_separate_debug_objfile (struct objfile *, struct objfile *);
extern void unlink_objfile (struct objfile *);
extern void free_objfile (struct objfile *);
extern void free_objfile_separate_debug (struct objfile *);
extern struct cleanup *make_cleanup_free_objfile (struct objfile *);
extern void free_all_objfiles (void);

21
gdb/symfile.c
View File

@ -1042,22 +1042,16 @@ symbol_file_add_with_addrs_or_offsets (bfd *abfd,
void
symbol_file_add_separate (bfd *bfd, int symfile_flags, struct objfile *objfile)
{
/* Currently only one separate debug objfile is supported. */
gdb_assert (objfile && objfile->separate_debug_objfile == NULL);
struct objfile *new_objfile;
objfile->separate_debug_objfile =
symbol_file_add_with_addrs_or_offsets
new_objfile = symbol_file_add_with_addrs_or_offsets
(bfd, symfile_flags,
0, /* No addr table. */
objfile->section_offsets, objfile->num_sections,
objfile->flags & (OBJF_REORDERED | OBJF_SHARED | OBJF_READNOW
| OBJF_USERLOADED));
objfile->separate_debug_objfile->separate_debug_objfile_backlink
= objfile;
/* Put the separate debug object before the normal one, this is so that
usage of the ALL_OBJFILES_SAFE macro will stay safe. */
put_objfile_before (objfile->separate_debug_objfile, objfile);
add_separate_debug_objfile (new_objfile, objfile);
}
/* Process the symbol file ABFD, as either the main file or as a
@ -2272,14 +2266,9 @@ reread_symbols (void)
clear_objfile_data (objfile);
/* Free the separate debug objfile if there is one. It will be
/* Free the separate debug objfiles. It will be
automatically recreated by sym_read. */
if (objfile->separate_debug_objfile)
{
/* Note: no need to clear separate_debug_objfile field as it is
done by free_objfile. */
free_objfile (objfile->separate_debug_objfile);
}
free_objfile_separate_debug (objfile);
/* FIXME: Do we have to free a whole linked list, or is this
enough? */

5
gdb/symfile.h
View File

@ -238,10 +238,9 @@ extern struct objfile *symbol_file_add_from_bfd (bfd *, int,
struct section_addr_info *,
int);
extern void symbol_file_add_separate (bfd *bfd, int symfile_flags,
struct objfile *objfile);
extern void symbol_file_add_separate (bfd *, int, struct objfile *);
extern char *find_separate_debug_file_by_debuglink (struct objfile *objfile);
extern char *find_separate_debug_file_by_debuglink (struct objfile *);
/* Create a new section_addr_info, with room for NUM_SECTIONS. */

64
gdb/symtab.c
View File

@ -1499,48 +1499,50 @@ lookup_symbol_aux_block (const char *name, const char *linkage_name,
psymtabs. */
struct symbol *
lookup_global_symbol_from_objfile (const struct objfile *objfile,
lookup_global_symbol_from_objfile (const struct objfile *main_objfile,
const char *name,
const char *linkage_name,
const domain_enum domain)
{
const struct objfile *objfile;
struct symbol *sym;
struct blockvector *bv;
const struct block *block;
struct symtab *s;
struct partial_symtab *ps;
/* Go through symtabs. */
ALL_OBJFILE_SYMTABS (objfile, s)
{
bv = BLOCKVECTOR (s);
block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
sym = lookup_block_symbol (block, name, linkage_name, domain);
if (sym)
{
block_found = block;
return fixup_symbol_section (sym, (struct objfile *)objfile);
}
}
for (objfile = main_objfile;
objfile;
objfile = objfile_separate_debug_iterate (main_objfile, objfile))
{
/* Go through symtabs. */
ALL_OBJFILE_SYMTABS (objfile, s)
{
bv = BLOCKVECTOR (s);
block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
sym = lookup_block_symbol (block, name, linkage_name, domain);
if (sym)
{
block_found = block;
return fixup_symbol_section (sym, (struct objfile *)objfile);
}
}
/* Now go through psymtabs. */
ALL_OBJFILE_PSYMTABS (objfile, ps)
{
if (!ps->readin
&& lookup_partial_symbol (ps, name, linkage_name,
1, domain))
{
s = PSYMTAB_TO_SYMTAB (ps);
bv = BLOCKVECTOR (s);
block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
sym = lookup_block_symbol (block, name, linkage_name, domain);
return fixup_symbol_section (sym, (struct objfile *)objfile);
}
}
if (objfile->separate_debug_objfile)
return lookup_global_symbol_from_objfile (objfile->separate_debug_objfile,
name, linkage_name, domain);
/* Now go through psymtabs. */
ALL_OBJFILE_PSYMTABS (objfile, ps)
{
if (!ps->readin
&& lookup_partial_symbol (ps, name, linkage_name,
1, domain))
{
s = PSYMTAB_TO_SYMTAB (ps);
bv = BLOCKVECTOR (s);
block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
sym = lookup_block_symbol (block, name, linkage_name, domain);
return fixup_symbol_section (sym, (struct objfile *)objfile);
}
}
}
return NULL;
}