From 4e06255f5cf2acf6a5abfe7df8c9690463259dea Mon Sep 17 00:00:00 2001 From: Arnaldo Carvalho de Melo Date: Fri, 27 Nov 2009 16:29:18 -0200 Subject: [PATCH] perf symbols: Make the kallsyms loading routines part of the dso class MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit So that the kallsyms loading routines are the direct counterpart of the vmlinux loading ones, i.e. dso__load_kallsyms is the counterpart of dso__load_vmlinux. In the process make them also use the symbols rb tree indexed by map->type, paving the way for supporting other types of symtabs, such as the next one to be supported: variables. This also allowed removal of yet another global variable: kernel_map__functions. Signed-off-by: Arnaldo Carvalho de Melo Cc: Frédéric Weisbecker Cc: Mike Galbraith Cc: Peter Zijlstra Cc: Paul Mackerras LKML-Reference: <1259346563-12568-7-git-send-email-acme@infradead.org> Signed-off-by: Ingo Molnar --- tools/perf/util/symbol.c | 77 ++++++++++++++++++++++++------------------------ 1 file changed, 38 insertions(+), 39 deletions(-) diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c index 9a2dd81..956656f 100644 --- a/tools/perf/util/symbol.c +++ b/tools/perf/util/symbol.c @@ -37,7 +37,6 @@ static int dso__load_kernel_sym(struct dso *self, struct map *map, unsigned int symbol__priv_size; static int vmlinux_path__nr_entries; static char **vmlinux_path; -static struct map *kernel_map__functions; static struct symbol_conf symbol_conf__defaults = { .use_modules = true, @@ -296,10 +295,11 @@ size_t dso__fprintf(struct dso *self, FILE *fp) * so that we can in the next step set the symbol ->end address and then * call kernel_maps__split_kallsyms. */ -static int kernel_maps__load_all_kallsyms(void) +static int dso__load_all_kallsyms(struct dso *self, struct map *map) { char *line = NULL; size_t n; + struct rb_root *root = &self->symbols[map->type]; FILE *file = fopen("/proc/kallsyms", "r"); if (file == NULL) @@ -342,13 +342,11 @@ static int kernel_maps__load_all_kallsyms(void) if (sym == NULL) goto out_delete_line; - /* * We will pass the symbols to the filter later, in - * kernel_maps__split_kallsyms, when we have split the - * maps per module + * map__split_kallsyms, when we have split the maps per module */ - symbols__insert(&kernel_map__functions->dso->symbols[MAP__FUNCTION], sym); + symbols__insert(root, sym); } free(line); @@ -367,12 +365,14 @@ out_failure: * kernel range is broken in several maps, named [kernel].N, as we don't have * the original ELF section names vmlinux have. */ -static int kernel_maps__split_kallsyms(symbol_filter_t filter) +static int dso__split_kallsyms(struct dso *self, struct map *map, + symbol_filter_t filter) { - struct map *map = kernel_map__functions; + struct map *curr_map = map; struct symbol *pos; int count = 0; - struct rb_node *next = rb_first(&kernel_map__functions->dso->symbols[map->type]); + struct rb_root *root = &self->symbols[map->type]; + struct rb_node *next = rb_first(root); int kernel_range = 0; while (next) { @@ -385,9 +385,9 @@ static int kernel_maps__split_kallsyms(symbol_filter_t filter) if (module) { *module++ = '\0'; - if (strcmp(map->dso->name, module)) { - map = kernel_maps__find_by_dso_name(module); - if (!map) { + if (strcmp(self->name, module)) { + curr_map = kernel_maps__find_by_dso_name(module); + if (curr_map == NULL) { pr_err("/proc/{kallsyms,modules} " "inconsistency!\n"); return -1; @@ -397,9 +397,9 @@ static int kernel_maps__split_kallsyms(symbol_filter_t filter) * So that we look just like we get from .ko files, * i.e. not prelinked, relative to map->start. */ - pos->start = map->map_ip(map, pos->start); - pos->end = map->map_ip(map, pos->end); - } else if (map != kernel_map__functions) { + pos->start = curr_map->map_ip(curr_map, pos->start); + pos->end = curr_map->map_ip(curr_map, pos->end); + } else if (curr_map != map) { char dso_name[PATH_MAX]; struct dso *dso; @@ -410,25 +410,24 @@ static int kernel_maps__split_kallsyms(symbol_filter_t filter) if (dso == NULL) return -1; - map = map__new2(pos->start, dso, MAP__FUNCTION); + curr_map = map__new2(pos->start, dso, map->type); if (map == NULL) { dso__delete(dso); return -1; } - map->map_ip = map->unmap_ip = identity__map_ip; - kernel_maps__insert(map); + curr_map->map_ip = curr_map->unmap_ip = identity__map_ip; + kernel_maps__insert(curr_map); ++kernel_range; } - if (filter && filter(map, pos)) { - rb_erase(&pos->rb_node, &kernel_map__functions->dso->symbols[map->type]); + if (filter && filter(curr_map, pos)) { + rb_erase(&pos->rb_node, root); symbol__delete(pos); } else { - if (map != kernel_map__functions) { - rb_erase(&pos->rb_node, - &kernel_map__functions->dso->symbols[map->type]); - symbols__insert(&map->dso->symbols[map->type], pos); + if (curr_map != map) { + rb_erase(&pos->rb_node, root); + symbols__insert(&curr_map->dso->symbols[curr_map->type], pos); } count++; } @@ -438,15 +437,16 @@ static int kernel_maps__split_kallsyms(symbol_filter_t filter) } -static int kernel_maps__load_kallsyms(symbol_filter_t filter) +static int dso__load_kallsyms(struct dso *self, struct map *map, + symbol_filter_t filter) { - if (kernel_maps__load_all_kallsyms()) + if (dso__load_all_kallsyms(self, map) < 0) return -1; - symbols__fixup_end(&kernel_map__functions->dso->symbols[MAP__FUNCTION]); - kernel_map__functions->dso->origin = DSO__ORIG_KERNEL; + symbols__fixup_end(&self->symbols[map->type]); + self->origin = DSO__ORIG_KERNEL; - return kernel_maps__split_kallsyms(filter); + return dso__split_kallsyms(self, map, filter); } size_t kernel_maps__fprintf(FILE *fp) @@ -1457,9 +1457,8 @@ static int dso__load_kernel_sym(struct dso *self, struct map *map, if (err <= 0) { pr_info("The file %s cannot be used, " "trying to use /proc/kallsyms...", self->long_name); - sleep(2); do_kallsyms: - err = kernel_maps__load_kallsyms(filter); + err = dso__load_kallsyms(self, map, filter); if (err > 0 && !is_kallsyms) dso__set_long_name(self, strdup("[kernel.kallsyms]")); } @@ -1541,18 +1540,19 @@ size_t dsos__fprintf_buildid(FILE *fp) static int kernel_maps__create_kernel_map(const struct symbol_conf *conf) { + struct map *kmap; struct dso *kernel = dso__new(conf->vmlinux_name ?: "[kernel.kallsyms]"); if (kernel == NULL) return -1; - kernel_map__functions = map__new2(0, kernel, MAP__FUNCTION); - if (kernel_map__functions == NULL) + kmap = map__new2(0, kernel, MAP__FUNCTION); + if (kmap == NULL) goto out_delete_kernel_dso; - kernel_map__functions->map_ip = kernel_map__functions->unmap_ip = identity__map_ip; - kernel->short_name = "[kernel]"; - kernel->kernel = 1; + kmap->map_ip = kmap->unmap_ip = identity__map_ip; + kernel->short_name = "[kernel]"; + kernel->kernel = 1; vdso = dso__new("[vdso]"); if (vdso == NULL) @@ -1563,15 +1563,14 @@ static int kernel_maps__create_kernel_map(const struct symbol_conf *conf) sizeof(kernel->build_id)) == 0) kernel->has_build_id = true; - kernel_maps__insert(kernel_map__functions); + kernel_maps__insert(kmap); dsos__add(&dsos__kernel, kernel); dsos__add(&dsos__user, vdso); return 0; out_delete_kernel_map: - map__delete(kernel_map__functions); - kernel_map__functions = NULL; + map__delete(kmap); out_delete_kernel_dso: dso__delete(kernel); return -1; -- 2.7.4