diff options
Diffstat (limited to 'tools/perf/util/symbol.c')
-rw-r--r-- | tools/perf/util/symbol.c | 67 |
1 files changed, 58 insertions, 9 deletions
diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c index b39f499e575..439ab947daf 100644 --- a/tools/perf/util/symbol.c +++ b/tools/perf/util/symbol.c @@ -295,7 +295,9 @@ static void symbols__insert_by_name(struct rb_root *self, struct symbol *sym) { struct rb_node **p = &self->rb_node; struct rb_node *parent = NULL; - struct symbol_name_rb_node *symn = ((void *)sym) - sizeof(*parent), *s; + struct symbol_name_rb_node *symn, *s; + + symn = container_of(sym, struct symbol_name_rb_node, sym); while (*p != NULL) { parent = *p; @@ -530,7 +532,7 @@ static int dso__split_kallsyms(struct dso *self, struct map *map, struct machine *machine = kmaps->machine; struct map *curr_map = map; struct symbol *pos; - int count = 0; + int count = 0, moved = 0; struct rb_root *root = &self->symbols[map->type]; struct rb_node *next = rb_first(root); int kernel_range = 0; @@ -588,6 +590,11 @@ static int dso__split_kallsyms(struct dso *self, struct map *map, char dso_name[PATH_MAX]; struct dso *dso; + if (count == 0) { + curr_map = map; + goto filter_symbol; + } + if (self->kernel == DSO_TYPE_GUEST_KERNEL) snprintf(dso_name, sizeof(dso_name), "[guest.kernel].%d", @@ -613,7 +620,7 @@ static int dso__split_kallsyms(struct dso *self, struct map *map, map_groups__insert(kmaps, curr_map); ++kernel_range; } - +filter_symbol: if (filter && filter(curr_map, pos)) { discard_symbol: rb_erase(&pos->rb_node, root); symbol__delete(pos); @@ -621,8 +628,9 @@ discard_symbol: rb_erase(&pos->rb_node, root); if (curr_map != map) { rb_erase(&pos->rb_node, root); symbols__insert(&curr_map->dso->symbols[curr_map->type], pos); - } - count++; + ++moved; + } else + ++count; } } @@ -632,7 +640,7 @@ discard_symbol: rb_erase(&pos->rb_node, root); dso__set_loaded(curr_map->dso, curr_map->type); } - return count; + return count + moved; } int dso__load_kallsyms(struct dso *self, const char *filename, @@ -1772,8 +1780,8 @@ out_failure: return -1; } -static int dso__load_vmlinux(struct dso *self, struct map *map, - const char *vmlinux, symbol_filter_t filter) +int dso__load_vmlinux(struct dso *self, struct map *map, + const char *vmlinux, symbol_filter_t filter) { int err = -1, fd; @@ -2123,14 +2131,55 @@ static struct dso *machine__create_kernel(struct machine *self) return kernel; } +struct process_args { + u64 start; +}; + +static int symbol__in_kernel(void *arg, const char *name, + char type __used, u64 start) +{ + struct process_args *args = arg; + + if (strchr(name, '[')) + return 0; + + args->start = start; + return 1; +} + +/* Figure out the start address of kernel map from /proc/kallsyms */ +static u64 machine__get_kernel_start_addr(struct machine *machine) +{ + const char *filename; + char path[PATH_MAX]; + struct process_args args; + + if (machine__is_host(machine)) { + filename = "/proc/kallsyms"; + } else { + if (machine__is_default_guest(machine)) + filename = (char *)symbol_conf.default_guest_kallsyms; + else { + sprintf(path, "%s/proc/kallsyms", machine->root_dir); + filename = path; + } + } + + if (kallsyms__parse(filename, &args, symbol__in_kernel) <= 0) + return 0; + + return args.start; +} + int __machine__create_kernel_maps(struct machine *self, struct dso *kernel) { enum map_type type; + u64 start = machine__get_kernel_start_addr(self); for (type = 0; type < MAP__NR_TYPES; ++type) { struct kmap *kmap; - self->vmlinux_maps[type] = map__new2(0, kernel, type); + self->vmlinux_maps[type] = map__new2(start, kernel, type); if (self->vmlinux_maps[type] == NULL) return -1; |