perf symbols: Rename kthreads to kmaps, using another abstraction for it
Using a struct thread instance just to hold the kernel space maps
(vmlinux + modules) is overkill and confuses people trying to
understand the perf symbols abstractions.
The kernel maps are really present in all threads, i.e. the kernel
is a library, not a separate thread.
So introduce the 'map_groups' abstraction and use it for the kernel
maps, now in the kmaps global variable.
It, in turn, will move, together with the threads list to the
perf_file abstraction, so that we can support multiple perf_file
instances, needed by perf diff.
Brainstormed-with: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Eduardo Habkost <ehabkost@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: <1260550239-5372-1-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/tools/perf/util/thread.c b/tools/perf/util/thread.c
index 603f561..a128512 100644
--- a/tools/perf/util/thread.c
+++ b/tools/perf/util/thread.c
@@ -9,11 +9,9 @@
static struct rb_root threads;
static struct thread *last_match;
-void thread__init(struct thread *self, pid_t pid)
+void map_groups__init(struct map_groups *self)
{
int i;
- self->pid = pid;
- self->comm = NULL;
for (i = 0; i < MAP__NR_TYPES; ++i) {
self->maps[i] = RB_ROOT;
INIT_LIST_HEAD(&self->removed_maps[i]);
@@ -25,7 +23,8 @@
struct thread *self = zalloc(sizeof(*self));
if (self != NULL) {
- thread__init(self, pid);
+ map_groups__init(&self->mg);
+ self->pid = pid;
self->comm = malloc(32);
if (self->comm)
snprintf(self->comm, 32, ":%d", self->pid);
@@ -57,8 +56,8 @@
[MAP__FUNCTION] = "Functions",
};
-static size_t __thread__fprintf_maps(struct thread *self,
- enum map_type type, FILE *fp)
+static size_t __map_groups__fprintf_maps(struct map_groups *self,
+ enum map_type type, FILE *fp)
{
size_t printed = fprintf(fp, "%s:\n", map_type__name[type]);
struct rb_node *nd;
@@ -76,16 +75,16 @@
return printed;
}
-size_t thread__fprintf_maps(struct thread *self, FILE *fp)
+size_t map_groups__fprintf_maps(struct map_groups *self, FILE *fp)
{
size_t printed = 0, i;
for (i = 0; i < MAP__NR_TYPES; ++i)
- printed += __thread__fprintf_maps(self, i, fp);
+ printed += __map_groups__fprintf_maps(self, i, fp);
return printed;
}
-static size_t __thread__fprintf_removed_maps(struct thread *self,
- enum map_type type, FILE *fp)
+static size_t __map_groups__fprintf_removed_maps(struct map_groups *self,
+ enum map_type type, FILE *fp)
{
struct map *pos;
size_t printed = 0;
@@ -101,20 +100,25 @@
return printed;
}
-static size_t thread__fprintf_removed_maps(struct thread *self, FILE *fp)
+static size_t map_groups__fprintf_removed_maps(struct map_groups *self, FILE *fp)
{
size_t printed = 0, i;
for (i = 0; i < MAP__NR_TYPES; ++i)
- printed += __thread__fprintf_removed_maps(self, i, fp);
+ printed += __map_groups__fprintf_removed_maps(self, i, fp);
return printed;
}
+static size_t map_groups__fprintf(struct map_groups *self, FILE *fp)
+{
+ size_t printed = map_groups__fprintf_maps(self, fp);
+ printed += fprintf(fp, "Removed maps:\n");
+ return printed + map_groups__fprintf_removed_maps(self, fp);
+}
+
static size_t thread__fprintf(struct thread *self, FILE *fp)
{
- size_t printed = fprintf(fp, "Thread %d %s\n", self->pid, self->comm);
- printed += thread__fprintf_removed_maps(self, fp);
- printed += fprintf(fp, "Removed maps:\n");
- return printed + thread__fprintf_removed_maps(self, fp);
+ return fprintf(fp, "Thread %d %s\n", self->pid, self->comm) +
+ map_groups__fprintf(&self->mg, fp);
}
struct thread *threads__findnew(pid_t pid)
@@ -168,7 +172,8 @@
return thread;
}
-static void thread__remove_overlappings(struct thread *self, struct map *map)
+static void map_groups__remove_overlappings(struct map_groups *self,
+ struct map *map)
{
struct rb_root *root = &self->maps[map->type];
struct rb_node *next = rb_first(root);
@@ -238,12 +243,15 @@
void thread__insert_map(struct thread *self, struct map *map)
{
- thread__remove_overlappings(self, map);
- maps__insert(&self->maps[map->type], map);
+ map_groups__remove_overlappings(&self->mg, map);
+ map_groups__insert(&self->mg, map);
}
-static int thread__clone_maps(struct thread *self, struct thread *parent,
- enum map_type type)
+/*
+ * XXX This should not really _copy_ te maps, but refcount them.
+ */
+static int map_groups__clone(struct map_groups *self,
+ struct map_groups *parent, enum map_type type)
{
struct rb_node *nd;
for (nd = rb_first(&parent->maps[type]); nd; nd = rb_next(nd)) {
@@ -251,7 +259,7 @@
struct map *new = map__clone(map);
if (new == NULL)
return -ENOMEM;
- thread__insert_map(self, new);
+ map_groups__insert(self, new);
}
return 0;
}
@@ -267,7 +275,7 @@
return -ENOMEM;
for (i = 0; i < MAP__NR_TYPES; ++i)
- if (thread__clone_maps(self, parent, i) < 0)
+ if (map_groups__clone(&self->mg, &parent->mg, i) < 0)
return -ENOMEM;
return 0;
}
@@ -286,11 +294,11 @@
return ret;
}
-struct symbol *thread__find_symbol(struct thread *self,
- enum map_type type, u64 addr,
- symbol_filter_t filter)
+struct symbol *map_groups__find_symbol(struct map_groups *self,
+ enum map_type type, u64 addr,
+ symbol_filter_t filter)
{
- struct map *map = thread__find_map(self, type, addr);
+ struct map *map = map_groups__find(self, type, addr);
if (map != NULL)
return map__find_symbol(map, map->map_ip(map, addr), filter);