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move probes to be per-bfd

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This patch moves the probe data from the objfile to the per-BFD
object.  This lets the probes be shared between different inferiors
(and different objfiles when dlmopen is in use, should gdb ever handle
that).

2014-03-03  Tom Tromey  <tromey@redhat.com>

	* elfread.c (probe_key): Change to bfd_data.
	(elf_get_probes, probe_key_free, _initialize_elfread): Probes are
	now per-BFD, not per-objfile.
	* stap-probe.c (stap_probe_destroy): Update comment.
	(handle_stap_probe): Allocate on the per-BFD obstack.
This commit is contained in:
Tom Tromey 2013-12-03 10:21:20 -07:00
parent 729662a522
commit 5d9cf8a4d3
3 changed files with 23 additions and 15 deletions
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8
gdb/ChangeLog
View File

@ -1,3 +1,11 @@
2014-03-03 Tom Tromey <tromey@redhat.com>
* elfread.c (probe_key): Change to bfd_data.
(elf_get_probes, probe_key_free, _initialize_elfread): Probes are
now per-BFD, not per-objfile.
* stap-probe.c (stap_probe_destroy): Update comment.
(handle_stap_probe): Allocate on the per-BFD obstack.
2014-03-03 Tom Tromey <tromey@redhat.com>
* break-catch-throw.c (fetch_probe_arguments): Use bound probes.

26
gdb/elfread.c
View File

@ -63,9 +63,9 @@ struct elfinfo
asection *mdebugsect; /* Section pointer for .mdebug section */
};
/* Per-objfile data for probe info. */
/* Per-BFD data for probe info. */
static const struct objfile_data *probe_key = NULL;
static const struct bfd_data *probe_key = NULL;
static void free_elfinfo (void *);
@ -1496,12 +1496,12 @@ elfstab_offset_sections (struct objfile *objfile, struct partial_symtab *pst)
static VEC (probe_p) *
elf_get_probes (struct objfile *objfile)
{
VEC (probe_p) *probes_per_objfile;
VEC (probe_p) *probes_per_bfd;
/* Have we parsed this objfile's probes already? */
probes_per_objfile = objfile_data (objfile, probe_key);
probes_per_bfd = bfd_data (objfile->obfd, probe_key);
if (!probes_per_objfile)
if (!probes_per_bfd)
{
int ix;
const struct probe_ops *probe_ops;
@ -1510,25 +1510,25 @@ elf_get_probes (struct objfile *objfile)
objfile. */
for (ix = 0; VEC_iterate (probe_ops_cp, all_probe_ops, ix, probe_ops);
ix++)
probe_ops->get_probes (&probes_per_objfile, objfile);
probe_ops->get_probes (&probes_per_bfd, objfile);
if (probes_per_objfile == NULL)
if (probes_per_bfd == NULL)
{
VEC_reserve (probe_p, probes_per_objfile, 1);
gdb_assert (probes_per_objfile != NULL);
VEC_reserve (probe_p, probes_per_bfd, 1);
gdb_assert (probes_per_bfd != NULL);
}
set_objfile_data (objfile, probe_key, probes_per_objfile);
set_bfd_data (objfile->obfd, probe_key, probes_per_bfd);
}
return probes_per_objfile;
return probes_per_bfd;
}
/* Helper function used to free the space allocated for storing SystemTap
probe information. */
static void
probe_key_free (struct objfile *objfile, void *d)
probe_key_free (bfd *abfd, void *d)
{
int ix;
VEC (probe_p) *probes = d;
@ -1614,7 +1614,7 @@ static const struct gnu_ifunc_fns elf_gnu_ifunc_fns =
void
_initialize_elfread (void)
{
probe_key = register_objfile_data_with_cleanup (NULL, probe_key_free);
probe_key = register_bfd_data_with_cleanup (NULL, probe_key_free);
add_symtab_fns (bfd_target_elf_flavour, &elf_sym_fns);
elf_objfile_gnu_ifunc_cache_data = register_objfile_data ();

4
gdb/stap-probe.c
View File

@ -1299,7 +1299,7 @@ stap_compile_to_ax (struct probe *probe_generic, struct agent_expr *expr,
}
/* Destroy (free) the data related to PROBE. PROBE memory itself is not feed
as it is allocated from OBJFILE_OBSTACK. */
as it is allocated on an obstack. */
static void
stap_probe_destroy (struct probe *probe_generic)
@ -1506,7 +1506,7 @@ handle_stap_probe (struct objfile *objfile, struct sdt_note *el,
const char *probe_args = NULL;
struct stap_probe *ret;
ret = obstack_alloc (&objfile->objfile_obstack, sizeof (*ret));
ret = obstack_alloc (&objfile->per_bfd->storage_obstack, sizeof (*ret));
ret->p.pops = &stap_probe_ops;
ret->p.arch = gdbarch;