perf tools: Consolidate symbol resolving across all tools

Now we have a very high level routine for simple tools to
process IP sample events:

	int event__preprocess_sample(const event_t *self,
				     struct addr_location *al,
				     symbol_filter_t filter)

It receives the event itself and will insert new threads in the
global threads list and resolve the map and symbol, filling all
this info into the new addr_location struct, so that tools like
annotate and report can further process the event by creating
hist_entries in their specific way (with or without callgraphs,
etc).

It in turn uses the new next layer function:

	void thread__find_addr_location(struct thread *self, u8 cpumode,
					enum map_type type, u64 addr,
					struct addr_location *al,
					symbol_filter_t filter)

This one will, given a thread (userspace or the kernel kthread
one), will find the given type (MAP__FUNCTION now, MAP__VARIABLE
too in the near future) at the given cpumode, taking vdsos into
account (userspace hit, but kernel symbol) and will fill all
these details in the addr_location given.

Tools that need a more compact API for plain function
resolution, like 'kmem', can use this other one:

	struct symbol *thread__find_function(struct thread *self, u64 addr,
					     symbol_filter_t filter)

So, to resolve a kernel symbol, that is all the 'kmem' tool
needs, its just a matter of calling:

	sym = thread__find_function(kthread, addr, NULL);

The 'filter' parameter is needed because we do lazy
parsing/loading of ELF symtabs or /proc/kallsyms.

With this we remove more code duplication all around, which is
always good, huh? :-)

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: John Kacur <jkacur@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <1259346563-12568-12-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 2 insertions, 24 deletions

diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index b788c2f5d672..fffcb937cdcb 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -43,7 +43,8 @@ static struct symbol_conf symbol_conf__defaults = {
         .try_vmlinux_path = true,
 };
 
-static struct thread kthread_mem, *kthread = &kthread_mem;
+static struct thread kthread_mem;
+struct thread *kthread = &kthread_mem;
 
 bool dso__loaded(const struct dso *self, enum map_type type)
 {
@@ -1178,29 +1179,6 @@ out:
         return ret;
 }
 
-static struct symbol *thread__find_symbol(struct thread *self, u64 ip,
-                                          enum map_type type, struct map **mapp,
-                                          symbol_filter_t filter)
-{
-        struct map *map = thread__find_map(self, type, ip);
-
-        if (mapp)
-                *mapp = map;
-
-        if (map) {
-                ip = map->map_ip(map, ip);
-                return map__find_symbol(map, ip, filter);
-        }
-
-        return NULL;
-}
-
-struct symbol *kernel_maps__find_function(u64 ip, struct map **mapp,
-                                          symbol_filter_t filter)
-{
-        return thread__find_symbol(kthread, ip, MAP__FUNCTION, mapp, filter);
-}
-
 static struct map *thread__find_map_by_name(struct thread *self, char *name)
 {
         struct rb_node *nd;