perf symbols: Remove perf_session usage in symbols layer

I noticed while writing the first test in 'perf regtest' that to
just test the symbol handling routines one needs to create a
perf session, that is a layer centered on a perf.data file,
events, etc, so I untied these layers.

This reduces the complexity for the users as the number of
parameters to most of the symbols and session APIs now was
reduced while not adding more state to all the map instances by
only having data that is needed to split the kernel (kallsyms
and ELF symtab sections) maps and do vmlinux relocation on the
main kernel map.

Signed-off-by: Arnaldo Carvalho de Melo <acme@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: <1265223128-11786-1-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 12 insertions, 8 deletions

diff --git a/tools/perf/util/map.c b/tools/perf/util/map.c
index c4d55a0da2ea..36ff0bf0315d 100644
--- a/tools/perf/util/map.c
+++ b/tools/perf/util/map.c
@@ -104,8 +104,7 @@ void map__fixup_end(struct map *self)
 
 #define DSO__DELETED "(deleted)"
 
-int map__load(struct map *self, struct perf_session *session,
-              symbol_filter_t filter)
+int map__load(struct map *self, symbol_filter_t filter)
 {
         const char *name = self->dso->long_name;
         int nr;
@@ -113,7 +112,7 @@ int map__load(struct map *self, struct perf_session *session,
         if (dso__loaded(self->dso, self->type))
                 return 0;
 
-        nr = dso__load(self->dso, self, session, filter);
+        nr = dso__load(self->dso, self, filter);
         if (nr < 0) {
                 if (self->dso->has_build_id) {
                         char sbuild_id[BUILD_ID_SIZE * 2 + 1];
@@ -144,24 +143,29 @@ int map__load(struct map *self, struct perf_session *session,
 
                 return -1;
         }
+        /*
+         * Only applies to the kernel, as its symtabs aren't relative like the
+         * module ones.
+         */
+        if (self->dso->kernel)
+                map__reloc_vmlinux(self);
 
         return 0;
 }
 
-struct symbol *map__find_symbol(struct map *self, struct perf_session *session,
-                                u64 addr, symbol_filter_t filter)
+struct symbol *map__find_symbol(struct map *self, u64 addr,
+                                symbol_filter_t filter)
 {
-        if (map__load(self, session, filter) < 0)
+        if (map__load(self, filter) < 0)
                 return NULL;
 
         return dso__find_symbol(self->dso, self->type, addr);
 }
 
 struct symbol *map__find_symbol_by_name(struct map *self, const char *name,
-                                        struct perf_session *session,
                                         symbol_filter_t filter)
 {
-        if (map__load(self, session, filter) < 0)
+        if (map__load(self, filter) < 0)
                 return NULL;
 
         if (!dso__sorted_by_name(self->dso, self->type))