perf symbols: Remove perf_session usage in symbols layer
I noticed while writing the first test in 'perf regtest' that to
just test the symbol handling routines one needs to create a
perf session, that is a layer centered on a perf.data file,
events, etc, so I untied these layers.
This reduces the complexity for the users as the number of
parameters to most of the symbols and session APIs now was
reduced while not adding more state to all the map instances by
only having data that is needed to split the kernel (kallsyms
and ELF symtab sections) maps and do vmlinux relocation on the
main kernel map.
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: <1265223128-11786-1-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 f9049d1..6138742 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -1,6 +1,5 @@
#include "util.h"
#include "../perf.h"
-#include "session.h"
#include "sort.h"
#include "string.h"
#include "symbol.h"
@@ -34,7 +33,7 @@
static void dsos__add(struct list_head *head, struct dso *dso);
static struct map *map__new2(u64 start, struct dso *dso, enum map_type type);
static int dso__load_kernel_sym(struct dso *self, struct map *map,
- struct perf_session *session, symbol_filter_t filter);
+ symbol_filter_t filter);
static int vmlinux_path__nr_entries;
static char **vmlinux_path;
@@ -480,8 +479,9 @@
* the original ELF section names vmlinux have.
*/
static int dso__split_kallsyms(struct dso *self, struct map *map,
- struct perf_session *session, symbol_filter_t filter)
+ symbol_filter_t filter)
{
+ struct map_groups *kmaps = map__kmap(map)->kmaps;
struct map *curr_map = map;
struct symbol *pos;
int count = 0;
@@ -503,7 +503,7 @@
*module++ = '\0';
if (strcmp(curr_map->dso->short_name, module)) {
- curr_map = map_groups__find_by_name(&session->kmaps, map->type, module);
+ curr_map = map_groups__find_by_name(kmaps, map->type, module);
if (curr_map == NULL) {
pr_debug("/proc/{kallsyms,modules} "
"inconsistency while looking "
@@ -538,7 +538,7 @@
}
curr_map->map_ip = curr_map->unmap_ip = identity__map_ip;
- map_groups__insert(&session->kmaps, curr_map);
+ map_groups__insert(kmaps, curr_map);
++kernel_range;
}
@@ -557,9 +557,8 @@
return count;
}
-
-static int dso__load_kallsyms(struct dso *self, const char *filename, struct map *map,
- struct perf_session *session, symbol_filter_t filter)
+int dso__load_kallsyms(struct dso *self, const char *filename,
+ struct map *map, symbol_filter_t filter)
{
if (dso__load_all_kallsyms(self, filename, map) < 0)
return -1;
@@ -567,7 +566,7 @@
symbols__fixup_end(&self->symbols[map->type]);
self->origin = DSO__ORIG_KERNEL;
- return dso__split_kallsyms(self, map, session, filter);
+ return dso__split_kallsyms(self, map, filter);
}
static int dso__load_perf_map(struct dso *self, struct map *map,
@@ -893,10 +892,10 @@
}
}
-static int dso__load_sym(struct dso *self, struct map *map,
- struct perf_session *session, const char *name, int fd,
- symbol_filter_t filter, int kernel, int kmodule)
+static int dso__load_sym(struct dso *self, struct map *map, const char *name,
+ int fd, symbol_filter_t filter, int kmodule)
{
+ struct kmap *kmap = self->kernel ? map__kmap(map) : NULL;
struct map *curr_map = map;
struct dso *curr_dso = self;
size_t dso_name_len = strlen(self->short_name);
@@ -953,7 +952,7 @@
nr_syms = shdr.sh_size / shdr.sh_entsize;
memset(&sym, 0, sizeof(sym));
- if (!kernel) {
+ if (!self->kernel) {
self->adjust_symbols = (ehdr.e_type == ET_EXEC ||
elf_section_by_name(elf, &ehdr, &shdr,
".gnu.prelink_undo",
@@ -967,9 +966,9 @@
int is_label = elf_sym__is_label(&sym);
const char *section_name;
- if (kernel && session->ref_reloc_sym.name != NULL &&
- strcmp(elf_name, session->ref_reloc_sym.name) == 0)
- perf_session__reloc_vmlinux_maps(session, sym.st_value);
+ if (kmap && kmap->ref_reloc_sym && kmap->ref_reloc_sym->name &&
+ strcmp(elf_name, kmap->ref_reloc_sym->name) == 0)
+ kmap->ref_reloc_sym->unrelocated_addr = sym.st_value;
if (!is_label && !elf_sym__is_a(&sym, map->type))
continue;
@@ -985,7 +984,7 @@
section_name = elf_sec__name(&shdr, secstrs);
- if (kernel || kmodule) {
+ if (self->kernel || kmodule) {
char dso_name[PATH_MAX];
if (strcmp(section_name,
@@ -1001,7 +1000,7 @@
snprintf(dso_name, sizeof(dso_name),
"%s%s", self->short_name, section_name);
- curr_map = map_groups__find_by_name(&session->kmaps, map->type, dso_name);
+ curr_map = map_groups__find_by_name(kmap->kmaps, map->type, dso_name);
if (curr_map == NULL) {
u64 start = sym.st_value;
@@ -1020,7 +1019,7 @@
curr_map->map_ip = identity__map_ip;
curr_map->unmap_ip = identity__map_ip;
curr_dso->origin = DSO__ORIG_KERNEL;
- map_groups__insert(&session->kmaps, curr_map);
+ map_groups__insert(kmap->kmaps, curr_map);
dsos__add(&dsos__kernel, curr_dso);
} else
curr_dso = curr_map->dso;
@@ -1236,8 +1235,7 @@
return origin[self->origin];
}
-int dso__load(struct dso *self, struct map *map, struct perf_session *session,
- symbol_filter_t filter)
+int dso__load(struct dso *self, struct map *map, symbol_filter_t filter)
{
int size = PATH_MAX;
char *name;
@@ -1249,7 +1247,7 @@
dso__set_loaded(self, map->type);
if (self->kernel)
- return dso__load_kernel_sym(self, map, session, filter);
+ return dso__load_kernel_sym(self, map, filter);
name = malloc(size);
if (!name)
@@ -1320,7 +1318,7 @@
fd = open(name, O_RDONLY);
} while (fd < 0);
- ret = dso__load_sym(self, map, NULL, name, fd, filter, 0, 0);
+ ret = dso__load_sym(self, map, name, fd, filter, 0);
close(fd);
/*
@@ -1376,7 +1374,7 @@
return 0;
}
-static int perf_session__set_modules_path_dir(struct perf_session *self, char *dirname)
+static int map_groups__set_modules_path_dir(struct map_groups *self, char *dirname)
{
struct dirent *dent;
DIR *dir = opendir(dirname);
@@ -1396,7 +1394,7 @@
snprintf(path, sizeof(path), "%s/%s",
dirname, dent->d_name);
- if (perf_session__set_modules_path_dir(self, path) < 0)
+ if (map_groups__set_modules_path_dir(self, path) < 0)
goto failure;
} else {
char *dot = strrchr(dent->d_name, '.'),
@@ -1410,7 +1408,7 @@
(int)(dot - dent->d_name), dent->d_name);
strxfrchar(dso_name, '-', '_');
- map = map_groups__find_by_name(&self->kmaps, MAP__FUNCTION, dso_name);
+ map = map_groups__find_by_name(self, MAP__FUNCTION, dso_name);
if (map == NULL)
continue;
@@ -1431,7 +1429,7 @@
return -1;
}
-static int perf_session__set_modules_path(struct perf_session *self)
+static int map_groups__set_modules_path(struct map_groups *self)
{
struct utsname uts;
char modules_path[PATH_MAX];
@@ -1442,7 +1440,7 @@
snprintf(modules_path, sizeof(modules_path), "/lib/modules/%s/kernel",
uts.release);
- return perf_session__set_modules_path_dir(self, modules_path);
+ return map_groups__set_modules_path_dir(self, modules_path);
}
/*
@@ -1452,8 +1450,8 @@
*/
static struct map *map__new2(u64 start, struct dso *dso, enum map_type type)
{
- struct map *self = malloc(sizeof(*self));
-
+ struct map *self = zalloc(sizeof(*self) +
+ (dso->kernel ? sizeof(struct kmap) : 0));
if (self != NULL) {
/*
* ->end will be filled after we load all the symbols
@@ -1464,8 +1462,8 @@
return self;
}
-struct map *perf_session__new_module_map(struct perf_session *self, u64 start,
- const char *filename)
+struct map *map_groups__new_module(struct map_groups *self, u64 start,
+ const char *filename)
{
struct map *map;
struct dso *dso = __dsos__findnew(&dsos__kernel, filename);
@@ -1478,11 +1476,11 @@
return NULL;
dso->origin = DSO__ORIG_KMODULE;
- map_groups__insert(&self->kmaps, map);
+ map_groups__insert(self, map);
return map;
}
-static int perf_session__create_module_maps(struct perf_session *self)
+static int map_groups__create_modules(struct map_groups *self)
{
char *line = NULL;
size_t n;
@@ -1520,7 +1518,7 @@
*sep = '\0';
snprintf(name, sizeof(name), "[%s]", line);
- map = perf_session__new_module_map(self, start, name);
+ map = map_groups__new_module(self, start, name);
if (map == NULL)
goto out_delete_line;
dso__kernel_module_get_build_id(map->dso);
@@ -1529,7 +1527,7 @@
free(line);
fclose(file);
- return perf_session__set_modules_path(self);
+ return map_groups__set_modules_path(self);
out_delete_line:
free(line);
@@ -1538,7 +1536,6 @@
}
static int dso__load_vmlinux(struct dso *self, struct map *map,
- struct perf_session *session,
const char *vmlinux, symbol_filter_t filter)
{
int err = -1, fd;
@@ -1572,14 +1569,14 @@
return -1;
dso__set_loaded(self, map->type);
- err = dso__load_sym(self, map, session, vmlinux, fd, filter, 1, 0);
+ err = dso__load_sym(self, map, vmlinux, fd, filter, 0);
close(fd);
return err;
}
int dso__load_vmlinux_path(struct dso *self, struct map *map,
- struct perf_session *session, symbol_filter_t filter)
+ symbol_filter_t filter)
{
int i, err = 0;
@@ -1587,8 +1584,7 @@
vmlinux_path__nr_entries);
for (i = 0; i < vmlinux_path__nr_entries; ++i) {
- err = dso__load_vmlinux(self, map, session, vmlinux_path[i],
- filter);
+ err = dso__load_vmlinux(self, map, vmlinux_path[i], filter);
if (err > 0) {
pr_debug("Using %s for symbols\n", vmlinux_path[i]);
dso__set_long_name(self, strdup(vmlinux_path[i]));
@@ -1600,7 +1596,7 @@
}
static int dso__load_kernel_sym(struct dso *self, struct map *map,
- struct perf_session *session, symbol_filter_t filter)
+ symbol_filter_t filter)
{
int err;
const char *kallsyms_filename = NULL;
@@ -1621,13 +1617,13 @@
* match.
*/
if (symbol_conf.vmlinux_name != NULL) {
- err = dso__load_vmlinux(self, map, session,
+ err = dso__load_vmlinux(self, map,
symbol_conf.vmlinux_name, filter);
goto out_try_fixup;
}
if (vmlinux_path != NULL) {
- err = dso__load_vmlinux_path(self, map, session, filter);
+ err = dso__load_vmlinux_path(self, map, filter);
if (err > 0)
goto out_fixup;
}
@@ -1675,7 +1671,7 @@
}
do_kallsyms:
- err = dso__load_kallsyms(self, kallsyms_filename, map, session, filter);
+ err = dso__load_kallsyms(self, kallsyms_filename, map, filter);
free(kallsyms_allocated_filename);
out_try_fixup:
@@ -1812,30 +1808,23 @@
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)
return -1;
vmlinux_maps[type]->map_ip =
vmlinux_maps[type]->unmap_ip = identity__map_ip;
+
+ kmap = map__kmap(vmlinux_maps[type]);
+ kmap->kmaps = self;
map_groups__insert(self, vmlinux_maps[type]);
}
return 0;
}
-static int map_groups__create_kernel_maps(struct map_groups *self,
- struct map *vmlinux_maps[MAP__NR_TYPES],
- const char *vmlinux)
-{
- struct dso *kernel = dsos__create_kernel(vmlinux);
-
- if (kernel == NULL)
- return -1;
-
- return __map_groups__create_kernel_maps(self, vmlinux_maps, kernel);
-}
-
static void vmlinux_path__exit(void)
{
while (--vmlinux_path__nr_entries >= 0) {
@@ -1941,19 +1930,22 @@
return -1;
}
-int perf_session__create_kernel_maps(struct perf_session *self)
+int map_groups__create_kernel_maps(struct map_groups *self,
+ struct map *vmlinux_maps[MAP__NR_TYPES])
{
- if (map_groups__create_kernel_maps(&self->kmaps, self->vmlinux_maps,
- symbol_conf.vmlinux_name) < 0)
+ struct dso *kernel = dsos__create_kernel(symbol_conf.vmlinux_name);
+
+ if (kernel == NULL)
return -1;
- if (symbol_conf.use_modules &&
- perf_session__create_module_maps(self) < 0)
- pr_debug("Failed to load list of modules for session %s, "
- "continuing...\n", self->filename);
+ if (__map_groups__create_kernel_maps(self, vmlinux_maps, kernel) < 0)
+ return -1;
+
+ if (symbol_conf.use_modules && map_groups__create_modules(self) < 0)
+ return -1;
/*
* Now that we have all the maps created, just set the ->end of them:
*/
- map_groups__fixup_end(&self->kmaps);
+ map_groups__fixup_end(self);
return 0;
}