perf symbols: Add machine helper routines

Created when writing the first 'perf test' regression testing routine.

Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 57 insertions, 20 deletions

diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index caa890f8e2c0..4c0146a49063 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -1983,23 +1983,23 @@ void dso__read_running_kernel_build_id(struct dso *self, struct machine *machine
                 self->has_build_id = true;
 }
 
-static struct dso *dsos__create_kernel(struct machine *machine)
+static struct dso *machine__create_kernel(struct machine *self)
 {
         const char *vmlinux_name = NULL;
         struct dso *kernel;
 
-        if (machine__is_host(machine)) {
+        if (machine__is_host(self)) {
                 vmlinux_name = symbol_conf.vmlinux_name;
                 kernel = dso__new_kernel(vmlinux_name);
         } else {
-                if (machine__is_default_guest(machine))
+                if (machine__is_default_guest(self))
                         vmlinux_name = symbol_conf.default_guest_vmlinux_name;
-                kernel = dso__new_guest_kernel(machine, vmlinux_name);
+                kernel = dso__new_guest_kernel(self, vmlinux_name);
         }
 
         if (kernel != NULL) {
-                dso__read_running_kernel_build_id(kernel, machine);
-                dsos__add(&machine->kernel_dsos, kernel);
+                dso__read_running_kernel_build_id(kernel, self);
+                dsos__add(&self->kernel_dsos, kernel);
         }
         return kernel;
 }
@@ -2026,6 +2026,23 @@ int __machine__create_kernel_maps(struct machine *self, struct dso *kernel)
         return 0;
 }
 
+int machine__create_kernel_maps(struct machine *self)
+{
+        struct dso *kernel = machine__create_kernel(self);
+
+        if (kernel == NULL ||
+            __machine__create_kernel_maps(self, kernel) < 0)
+                return -1;
+
+        if (symbol_conf.use_modules && machine__create_modules(self) < 0)
+                pr_debug("Problems creating module maps, continuing anyway...\n");
+        /*
+         * Now that we have all the maps created, just set the ->end of them:
+         */
+        map_groups__fixup_end(&self->kmaps);
+        return 0;
+}
+
 static void vmlinux_path__exit(void)
 {
         while (--vmlinux_path__nr_entries >= 0) {
@@ -2144,25 +2161,12 @@ out_free_comm_list:
 
 int machines__create_kernel_maps(struct rb_root *self, pid_t pid)
 {
-        struct dso *kernel;
         struct machine *machine = machines__findnew(self, pid);
 
         if (machine == NULL)
                 return -1;
-        kernel = dsos__create_kernel(machine);
-        if (kernel == NULL)
-                return -1;
-
-        if (__machine__create_kernel_maps(machine, kernel) < 0)
-                return -1;
 
-        if (symbol_conf.use_modules && machine__create_modules(machine) < 0)
-                pr_debug("Problems creating module maps, continuing anyway...\n");
-        /*
-         * Now that we have all the maps created, just set the ->end of them:
-         */
-        map_groups__fixup_end(&machine->kmaps);
-        return 0;
+        return machine__create_kernel_maps(machine);
 }
 
 static int hex(char ch)
@@ -2248,3 +2252,36 @@ failure:
 
         return ret;
 }
+
+int machine__load_kallsyms(struct machine *self, const char *filename,
+                           enum map_type type, symbol_filter_t filter)
+{
+        struct map *map = self->vmlinux_maps[type];
+        int ret = dso__load_kallsyms(map->dso, filename, map, filter);
+
+        if (ret > 0) {
+                dso__set_loaded(map->dso, type);
+                /*
+                 * Since /proc/kallsyms will have multiple sessions for the
+                 * kernel, with modules between them, fixup the end of all
+                 * sections.
+                 */
+                __map_groups__fixup_end(&self->kmaps, type);
+        }
+
+        return ret;
+}
+
+int machine__load_vmlinux_path(struct machine *self, enum map_type type,
+                               symbol_filter_t filter)
+{
+        struct map *map = self->vmlinux_maps[type];
+        int ret = dso__load_vmlinux_path(map->dso, map, filter);
+
+        if (ret > 0) {
+                dso__set_loaded(map->dso, type);
+                map__reloc_vmlinux(map);
+        }
+
+        return ret;
+}