perf symbols: Split the dsos list into kernel and user parts

We don't need to look at modules in dsos__findnew because the
kernel events come only with user DSOs. Also we need a way to
list just the module DSOs so that we can create multiple sets of
maps, now that we will support maps for the variables in a
symtab.

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: <1259346563-12568-3-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

3 files changed, 48 insertions, 22 deletions

diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index 4b586569bb02..4805e6dfd23c 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -185,11 +185,11 @@ static int do_write(int fd, const void *buf, size_t size)
         return 0;
 }
 
-static int dsos__write_buildid_table(int fd)
+static int __dsos__write_buildid_table(struct list_head *head, int fd)
 {
         struct dso *pos;
 
-        list_for_each_entry(pos, &dsos, node) {
+        list_for_each_entry(pos, head, node) {
                 int err;
                 struct build_id_event b;
                 size_t len;
@@ -212,6 +212,14 @@ static int dsos__write_buildid_table(int fd)
         return 0;
 }
 
+static int dsos__write_buildid_table(int fd)
+{
+        int err = __dsos__write_buildid_table(&dsos__kernel, fd);
+        if (err == 0)
+                err = __dsos__write_buildid_table(&dsos__user, fd);
+        return err;
+}
+
 static int perf_header__adds_write(struct perf_header *self, int fd)
 {
         int nr_sections;
diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index 687fb7f8cc03..dc25231813ee 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -28,8 +28,7 @@ enum dso_origin {
         DSO__ORIG_NOT_FOUND,
 };
 
-static void dsos__add(struct dso *dso);
-static struct dso *dsos__find(const char *name);
+static void dsos__add(struct list_head *head, struct dso *dso);
 static struct map *map__new2(u64 start, struct dso *dso);
 static void kernel_maps__insert(struct map *map);
 static int dso__load_kernel_sym(struct dso *self, struct map *map,
@@ -855,7 +854,7 @@ static int dso__load_sym(struct dso *self, struct map *map, const char *name,
                                 curr_map->unmap_ip = identity__map_ip;
                                 curr_dso->origin = DSO__ORIG_KERNEL;
                                 kernel_maps__insert(curr_map);
-                                dsos__add(curr_dso);
+                                dsos__add(&dsos__kernel, curr_dso);
                         } else
                                 curr_dso = curr_map->dso;
 
@@ -907,12 +906,12 @@ static bool dso__build_id_equal(const struct dso *self, u8 *build_id)
         return memcmp(self->build_id, build_id, sizeof(self->build_id)) == 0;
 }
 
-bool dsos__read_build_ids(void)
+static bool __dsos__read_build_ids(struct list_head *head)
 {
         bool have_build_id = false;
         struct dso *pos;
 
-        list_for_each_entry(pos, &dsos, node)
+        list_for_each_entry(pos, head, node)
                 if (filename__read_build_id(pos->long_name, pos->build_id,
                                             sizeof(pos->build_id)) > 0) {
                         have_build_id     = true;
@@ -922,6 +921,12 @@ bool dsos__read_build_ids(void)
         return have_build_id;
 }
 
+bool dsos__read_build_ids(void)
+{
+        return __dsos__read_build_ids(&dsos__kernel) ||
+               __dsos__read_build_ids(&dsos__user);
+}
+
 /*
  * Align offset to 4 bytes as needed for note name and descriptor data.
  */
@@ -1343,7 +1348,7 @@ static int kernel_maps__create_module_maps(void)
 
                 dso->origin = DSO__ORIG_KMODULE;
                 kernel_maps__insert(map);
-                dsos__add(dso);
+                dsos__add(&dsos__kernel, dso);
         }
 
         free(line);
@@ -1445,19 +1450,20 @@ out_fixup:
         return err;
 }
 
-LIST_HEAD(dsos);
+LIST_HEAD(dsos__user);
+LIST_HEAD(dsos__kernel);
 struct dso *vdso;
 
-static void dsos__add(struct dso *dso)
+static void dsos__add(struct list_head *head, struct dso *dso)
 {
-        list_add_tail(&dso->node, &dsos);
+        list_add_tail(&dso->node, head);
 }
 
-static struct dso *dsos__find(const char *name)
+static struct dso *dsos__find(struct list_head *head, const char *name)
 {
         struct dso *pos;
 
-        list_for_each_entry(pos, &dsos, node)
+        list_for_each_entry(pos, head, node)
                 if (strcmp(pos->name, name) == 0)
                         return pos;
         return NULL;
@@ -1465,12 +1471,12 @@ static struct dso *dsos__find(const char *name)
 
 struct dso *dsos__findnew(const char *name)
 {
-        struct dso *dso = dsos__find(name);
+        struct dso *dso = dsos__find(&dsos__user, name);
 
         if (!dso) {
                 dso = dso__new(name);
                 if (dso != NULL) {
-                        dsos__add(dso);
+                        dsos__add(&dsos__user, dso);
                         dso__set_basename(dso);
                 }
         }
@@ -1478,26 +1484,38 @@ struct dso *dsos__findnew(const char *name)
         return dso;
 }
 
-void dsos__fprintf(FILE *fp)
+static void __dsos__fprintf(struct list_head *head, FILE *fp)
 {
         struct dso *pos;
 
-        list_for_each_entry(pos, &dsos, node)
+        list_for_each_entry(pos, head, node)
                 dso__fprintf(pos, fp);
 }
 
-size_t dsos__fprintf_buildid(FILE *fp)
+void dsos__fprintf(FILE *fp)
+{
+        __dsos__fprintf(&dsos__kernel, fp);
+        __dsos__fprintf(&dsos__user, fp);
+}
+
+static size_t __dsos__fprintf_buildid(struct list_head *head, FILE *fp)
 {
         struct dso *pos;
         size_t ret = 0;
 
-        list_for_each_entry(pos, &dsos, node) {
+        list_for_each_entry(pos, head, node) {
                 ret += dso__fprintf_buildid(pos, fp);
                 ret += fprintf(fp, " %s\n", pos->long_name);
         }
         return ret;
 }
 
+size_t dsos__fprintf_buildid(FILE *fp)
+{
+        return (__dsos__fprintf_buildid(&dsos__kernel, fp) +
+                __dsos__fprintf_buildid(&dsos__user, fp));
+}
+
 static int kernel_maps__create_kernel_map(const struct symbol_conf *conf)
 {
         struct dso *kernel = dso__new(conf->vmlinux_name ?: "[kernel.kallsyms]");
@@ -1523,8 +1541,8 @@ static int kernel_maps__create_kernel_map(const struct symbol_conf *conf)
                 kernel->has_build_id = true;
 
         kernel_maps__insert(kernel_map__functions);
-        dsos__add(kernel);
-        dsos__add(vdso);
+        dsos__add(&dsos__kernel, kernel);
+        dsos__add(&dsos__user, vdso);
 
         return 0;
 
diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h
index b42d196dd8e9..5d0371fe8a06 100644
--- a/tools/perf/util/symbol.h
+++ b/tools/perf/util/symbol.h
@@ -104,7 +104,7 @@ size_t kernel_maps__fprintf(FILE *fp);
 
 int symbol__init(struct symbol_conf *conf);
 
-extern struct list_head dsos;
+extern struct list_head dsos__user, dsos__kernel;
 extern struct map *kernel_map__functions;
 extern struct dso *vdso;
 #endif /* __PERF_SYMBOL */