perf machine: Adopt some map_groups functions

Those functions operated on members now grouped in 'struct machine', so
move those methods to this new class.

The changes made to 'perf probe' shows that using this abstraction
inserting probes on guests almost got supported for free.

Cc: Avi Kivity <avi@redhat.com>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Zhang, Yanmin <yanmin_zhang@linux.intel.com>
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 30 insertions, 41 deletions

diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index c9c0bdd667ac..12359c37240c 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -1528,21 +1528,20 @@ static char *get_kernel_version(const char *root_dir)
 	return strdup(name);
 }
 
-static int map_groups__set_modules_path(struct map_groups *self,
-				const char *root_dir)
+static int machine__set_modules_path(struct machine *self)
 {
 	char *version;
 	char modules_path[PATH_MAX];
 
-	version = get_kernel_version(root_dir);
+	version = get_kernel_version(self->root_dir);
 	if (!version)
 		return -1;
 
 	snprintf(modules_path, sizeof(modules_path), "%s/lib/modules/%s/kernel",
-		 root_dir, version);
+		 self->root_dir, version);
 	free(version);
 
-	return map_groups__set_modules_path_dir(self, modules_path);
+	return map_groups__set_modules_path_dir(&self->kmaps, modules_path);
 }
 
 /*
@@ -1564,14 +1563,12 @@ static struct map *map__new2(u64 start, struct dso *dso, enum map_type type)
 	return self;
 }
 
-struct map *map_groups__new_module(struct map_groups *self, u64 start,
-				const char *filename,
-				struct machine *machine)
+struct map *machine__new_module(struct machine *self, u64 start,
+				const char *filename)
 {
 	struct map *map;
-	struct dso *dso;
+	struct dso *dso = __dsos__findnew(&self->kernel_dsos, filename);
 
-	dso = __dsos__findnew(&machine->kernel_dsos, filename);
 	if (dso == NULL)
 		return NULL;
 
@@ -1579,28 +1576,27 @@ struct map *map_groups__new_module(struct map_groups *self, u64 start,
 	if (map == NULL)
 		return NULL;
 
-	if (machine__is_host(machine))
+	if (machine__is_host(self))
 		dso->origin = DSO__ORIG_KMODULE;
 	else
 		dso->origin = DSO__ORIG_GUEST_KMODULE;
-	map_groups__insert(self, map);
+	map_groups__insert(&self->kmaps, map);
 	return map;
 }
 
-static int map_groups__create_modules(struct machine *machine)
+static int machine__create_modules(struct machine *self)
 {
 	char *line = NULL;
 	size_t n;
 	FILE *file;
 	struct map *map;
-	const char *root_dir;
 	const char *modules;
 	char path[PATH_MAX];
 
-	if (machine__is_default_guest(machine))
+	if (machine__is_default_guest(self))
 		modules = symbol_conf.default_guest_modules;
 	else {
-		sprintf(path, "%s/proc/modules", machine->root_dir);
+		sprintf(path, "%s/proc/modules", self->root_dir);
 		modules = path;
 	}
 
@@ -1608,8 +1604,6 @@ static int map_groups__create_modules(struct machine *machine)
 	if (file == NULL)
 		return -1;
 
-	root_dir = machine->root_dir;
-
 	while (!feof(file)) {
 		char name[PATH_MAX];
 		u64 start;
@@ -1638,17 +1632,16 @@ static int map_groups__create_modules(struct machine *machine)
 		*sep = '\0';
 
 		snprintf(name, sizeof(name), "[%s]", line);
-		map = map_groups__new_module(&machine->kmaps, start,
-					     name, machine);
+		map = machine__new_module(self, start, name);
 		if (map == NULL)
 			goto out_delete_line;
-		dso__kernel_module_get_build_id(map->dso, root_dir);
+		dso__kernel_module_get_build_id(map->dso, self->root_dir);
 	}
 
 	free(line);
 	fclose(file);
 
-	return map_groups__set_modules_path(&machine->kmaps, root_dir);
+	return machine__set_modules_path(self);
 
 out_delete_line:
 	free(line);
@@ -2005,25 +1998,23 @@ static struct dso *dsos__create_kernel(struct machine *machine)
 	return kernel;
 }
 
-int __map_groups__create_kernel_maps(struct map_groups *self,
-				     struct map *vmlinux_maps[MAP__NR_TYPES],
-				     struct dso *kernel)
+int __machine__create_kernel_maps(struct machine *self, struct dso *kernel)
 {
 	enum map_type type;
 
 	for (type = 0; type < MAP__NR_TYPES; ++type) {
 		struct kmap *kmap;
 
-		vmlinux_maps[type] = map__new2(0, kernel, type);
-		if (vmlinux_maps[type] == NULL)
+		self->vmlinux_maps[type] = map__new2(0, kernel, type);
+		if (self->vmlinux_maps[type] == NULL)
 			return -1;
 
-		vmlinux_maps[type]->map_ip =
-			vmlinux_maps[type]->unmap_ip = identity__map_ip;
+		self->vmlinux_maps[type]->map_ip =
+			self->vmlinux_maps[type]->unmap_ip = identity__map_ip;
 
-		kmap = map__kmap(vmlinux_maps[type]);
-		kmap->kmaps = self;
-		map_groups__insert(self, vmlinux_maps[type]);
+		kmap = map__kmap(self->vmlinux_maps[type]);
+		kmap->kmaps = &self->kmaps;
+		map_groups__insert(&self->kmaps, self->vmlinux_maps[type]);
 	}
 
 	return 0;
@@ -2145,10 +2136,10 @@ out_free_comm_list:
 	return -1;
 }
 
-int map_groups__create_kernel_maps(struct rb_root *machines, pid_t pid)
+int machines__create_kernel_maps(struct rb_root *self, pid_t pid)
 {
 	struct dso *kernel;
-	struct machine *machine = machines__findnew(machines, pid);
+	struct machine *machine = machines__findnew(self, pid);
 
 	if (machine == NULL)
 		return -1;
@@ -2156,12 +2147,10 @@ int map_groups__create_kernel_maps(struct rb_root *machines, pid_t pid)
 	if (kernel == NULL)
 		return -1;
 
-	if (__map_groups__create_kernel_maps(&machine->kmaps,
-					     machine->vmlinux_maps, kernel) < 0)
+	if (__machine__create_kernel_maps(machine, kernel) < 0)
 		return -1;
 
-	if (symbol_conf.use_modules &&
-	    map_groups__create_modules(machine) < 0)
+	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:
@@ -2213,7 +2202,7 @@ char *strxfrchar(char *s, char from, char to)
 	return s;
 }
 
-int map_groups__create_guest_kernel_maps(struct rb_root *machines)
+int machines__create_guest_kernel_maps(struct rb_root *self)
 {
 	int ret = 0;
 	struct dirent **namelist = NULL;
@@ -2224,7 +2213,7 @@ int map_groups__create_guest_kernel_maps(struct rb_root *machines)
 	if (symbol_conf.default_guest_vmlinux_name ||
 	    symbol_conf.default_guest_modules ||
 	    symbol_conf.default_guest_kallsyms) {
-		map_groups__create_kernel_maps(machines, DEFAULT_GUEST_KERNEL_ID);
+		machines__create_kernel_maps(self, DEFAULT_GUEST_KERNEL_ID);
 	}
 
 	if (symbol_conf.guestmount) {
@@ -2245,7 +2234,7 @@ int map_groups__create_guest_kernel_maps(struct rb_root *machines)
 				pr_debug("Can't access file %s\n", path);
 				goto failure;
 			}
-			map_groups__create_kernel_maps(machines, pid);
+			machines__create_kernel_maps(self, pid);
 		}
 failure:
 		free(namelist);