perf symbols: Split helpers used when creating kernel dso object

To make it clear and allow for direct usage by, for instance,
regression test suites.

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: <1264633557-17597-3-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index 26ec603..f9049d1 100644 (file)
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -1762,24 +1762,38 @@ size_t dsos__fprintf_buildid(FILE *fp, bool with_hits)
                __dsos__fprintf_buildid(&dsos__user, fp, with_hits));
 }
 
+struct dso *dso__new_kernel(const char *name)
+{
+       struct dso *self = dso__new(name ?: "[kernel.kallsyms]");
+
+       if (self != NULL) {
+               self->short_name = "[kernel]";
+               self->kernel     = 1;
+       }
+
+       return self;
+}
+
+void dso__read_running_kernel_build_id(struct dso *self)
+{
+       if (sysfs__read_build_id("/sys/kernel/notes", self->build_id,
+                                sizeof(self->build_id)) == 0)
+               self->has_build_id = true;
+}
+
 static struct dso *dsos__create_kernel(const char *vmlinux)
 {
-       struct dso *kernel = dso__new(vmlinux ?: "[kernel.kallsyms]");
+       struct dso *kernel = dso__new_kernel(vmlinux);
 
        if (kernel == NULL)
                return NULL;
 
-       kernel->short_name = "[kernel]";
-       kernel->kernel     = 1;
-
        vdso = dso__new("[vdso]");
        if (vdso == NULL)
                goto out_delete_kernel_dso;
        dso__set_loaded(vdso, MAP__FUNCTION);
 
-       if (sysfs__read_build_id("/sys/kernel/notes", kernel->build_id,
-                                sizeof(kernel->build_id)) == 0)
-               kernel->has_build_id = true;
+       dso__read_running_kernel_build_id(kernel);
 
        dsos__add(&dsos__kernel, kernel);
        dsos__add(&dsos__user, vdso);

diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h
index a94997a..1243027 100644 (file)
--- a/tools/perf/util/symbol.h
+++ b/tools/perf/util/symbol.h
@@ -109,6 +109,7 @@ struct dso {
 };
 
 struct dso *dso__new(const char *name);
+struct dso *dso__new_kernel(const char *name);
 void dso__delete(struct dso *self);
 
 bool dso__loaded(const struct dso *self, enum map_type type);
@@ -139,6 +140,7 @@ size_t dso__fprintf(struct dso *self, enum map_type type, FILE *fp);
 char dso__symtab_origin(const struct dso *self);
 void dso__set_long_name(struct dso *self, char *name);
 void dso__set_build_id(struct dso *self, void *build_id);
+void dso__read_running_kernel_build_id(struct dso *self);
 struct symbol *dso__find_symbol(struct dso *self, enum map_type type, u64 addr);
 struct symbol *dso__find_symbol_by_name(struct dso *self, enum map_type type,
                                        const char *name);