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perf session: Keep pointers to the vmlinux maps 

So that tools such as 'perf probe' don't have to lookup
'[kernel.kallsyms]' but instead access them directly after
perf_session__create_kernel_maps or
map_groups__create_kernel_maps.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <1262629169-22797-4-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Arnaldo Carvalho de Melo 2010-01-04 16:19:29 -02:00 committed by Ingo Molnar
parent f92cb24c78
commit de1764892a
3 changed files with 15 additions and 19 deletions
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4
tools/perf/builtin-probe.c
View File

@ -235,9 +235,7 @@ int cmd_probe(int argc, const char **argv, const char *prefix __used)
session.psession = perf_session__new(NULL, O_WRONLY, false);
if (session.psession == NULL)
die("Failed to init perf_session.");
session.kmap = map_groups__find_by_name(&session.psession->kmaps,
MAP__FUNCTION,
"[kernel.kallsyms]");
session.kmap = session.psession->vmlinux_maps[MAP__FUNCTION];
if (!session.kmap)
die("Could not find kernel map.\n");

1
tools/perf/util/session.h
View File

@ -18,6 +18,7 @@ struct perf_session {
struct map_groups kmaps;
struct rb_root threads;
struct thread *last_match;
struct map *vmlinux_maps[MAP__NR_TYPES];
struct events_stats events_stats;
unsigned long event_total[PERF_RECORD_MAX];
unsigned long unknown_events;

29
tools/perf/util/symbol.c
View File

@ -1662,7 +1662,7 @@ size_t dsos__fprintf_buildid(FILE *fp)
__dsos__fprintf_buildid(&dsos__user, fp));
}
static struct dso *dsos__create_kernel( const char *vmlinux)
static struct dso *dsos__create_kernel(const char *vmlinux)
{
struct dso *kernel = dso__new(vmlinux ?: "[kernel.kallsyms]");
@ -1691,29 +1691,26 @@ out_delete_kernel_dso:
return NULL;
}
static int map_groups__create_kernel_maps(struct map_groups *self, const char *vmlinux)
static int map_groups__create_kernel_maps(struct map_groups *self,
struct map *vmlinux_maps[MAP__NR_TYPES],
const char *vmlinux)
{
struct map *functions, *variables;
struct dso *kernel = dsos__create_kernel(vmlinux);
enum map_type type;
if (kernel == NULL)
return -1;
functions = map__new2(0, kernel, MAP__FUNCTION);
if (functions == NULL)
return -1;
for (type = 0; type < MAP__NR_TYPES; ++type) {
vmlinux_maps[type] = map__new2(0, kernel, type);
if (vmlinux_maps[type] == NULL)
return -1;
variables = map__new2(0, kernel, MAP__VARIABLE);
if (variables == NULL) {
map__delete(functions);
return -1;
vmlinux_maps[type]->map_ip =
vmlinux_maps[type]->unmap_ip = identity__map_ip;
map_groups__insert(self, vmlinux_maps[type]);
}
functions->map_ip = functions->unmap_ip =
variables->map_ip = variables->unmap_ip = identity__map_ip;
map_groups__insert(self, functions);
map_groups__insert(self, variables);
return 0;
}
@ -1824,7 +1821,7 @@ out_free_comm_list:
int perf_session__create_kernel_maps(struct perf_session *self)
{
if (map_groups__create_kernel_maps(&self->kmaps,
if (map_groups__create_kernel_maps(&self->kmaps, self->vmlinux_maps,
symbol_conf.vmlinux_name) < 0)
return -1;