diff options
Diffstat (limited to 'tools/perf/builtin-buildid-cache.c')
| -rw-r--r-- | tools/perf/builtin-buildid-cache.c | 448 |
1 files changed, 448 insertions, 0 deletions
diff --git a/tools/perf/builtin-buildid-cache.c b/tools/perf/builtin-buildid-cache.c new file mode 100644 index 000000000..d47a0cdc7 --- /dev/null +++ b/tools/perf/builtin-buildid-cache.c @@ -0,0 +1,448 @@ +/* + * builtin-buildid-cache.c + * + * Builtin buildid-cache command: Manages build-id cache + * + * Copyright (C) 2010, Red Hat Inc. + * Copyright (C) 2010, Arnaldo Carvalho de Melo <acme@redhat.com> + */ +#include <sys/types.h> +#include <sys/time.h> +#include <time.h> +#include <dirent.h> +#include <unistd.h> +#include "builtin.h" +#include "perf.h" +#include "util/cache.h" +#include "util/debug.h" +#include "util/header.h" +#include "util/parse-options.h" +#include "util/strlist.h" +#include "util/build-id.h" +#include "util/session.h" +#include "util/symbol.h" + +static int build_id_cache__kcore_buildid(const char *proc_dir, char *sbuildid) +{ + char root_dir[PATH_MAX]; + char notes[PATH_MAX]; + u8 build_id[BUILD_ID_SIZE]; + char *p; + + strlcpy(root_dir, proc_dir, sizeof(root_dir)); + + p = strrchr(root_dir, '/'); + if (!p) + return -1; + *p = '\0'; + + scnprintf(notes, sizeof(notes), "%s/sys/kernel/notes", root_dir); + + if (sysfs__read_build_id(notes, build_id, sizeof(build_id))) + return -1; + + build_id__sprintf(build_id, sizeof(build_id), sbuildid); + + return 0; +} + +static int build_id_cache__kcore_dir(char *dir, size_t sz) +{ + struct timeval tv; + struct tm tm; + char dt[32]; + + if (gettimeofday(&tv, NULL) || !localtime_r(&tv.tv_sec, &tm)) + return -1; + + if (!strftime(dt, sizeof(dt), "%Y%m%d%H%M%S", &tm)) + return -1; + + scnprintf(dir, sz, "%s%02u", dt, (unsigned)tv.tv_usec / 10000); + + return 0; +} + +static bool same_kallsyms_reloc(const char *from_dir, char *to_dir) +{ + char from[PATH_MAX]; + char to[PATH_MAX]; + const char *name; + u64 addr1 = 0, addr2 = 0; + int i; + + scnprintf(from, sizeof(from), "%s/kallsyms", from_dir); + scnprintf(to, sizeof(to), "%s/kallsyms", to_dir); + + for (i = 0; (name = ref_reloc_sym_names[i]) != NULL; i++) { + addr1 = kallsyms__get_function_start(from, name); + if (addr1) + break; + } + + if (name) + addr2 = kallsyms__get_function_start(to, name); + + return addr1 == addr2; +} + +static int build_id_cache__kcore_existing(const char *from_dir, char *to_dir, + size_t to_dir_sz) +{ + char from[PATH_MAX]; + char to[PATH_MAX]; + char to_subdir[PATH_MAX]; + struct dirent *dent; + int ret = -1; + DIR *d; + + d = opendir(to_dir); + if (!d) + return -1; + + scnprintf(from, sizeof(from), "%s/modules", from_dir); + + while (1) { + dent = readdir(d); + if (!dent) + break; + if (dent->d_type != DT_DIR) + continue; + scnprintf(to, sizeof(to), "%s/%s/modules", to_dir, + dent->d_name); + scnprintf(to_subdir, sizeof(to_subdir), "%s/%s", + to_dir, dent->d_name); + if (!compare_proc_modules(from, to) && + same_kallsyms_reloc(from_dir, to_subdir)) { + strlcpy(to_dir, to_subdir, to_dir_sz); + ret = 0; + break; + } + } + + closedir(d); + + return ret; +} + +static int build_id_cache__add_kcore(const char *filename, bool force) +{ + char dir[32], sbuildid[BUILD_ID_SIZE * 2 + 1]; + char from_dir[PATH_MAX], to_dir[PATH_MAX]; + char *p; + + strlcpy(from_dir, filename, sizeof(from_dir)); + + p = strrchr(from_dir, '/'); + if (!p || strcmp(p + 1, "kcore")) + return -1; + *p = '\0'; + + if (build_id_cache__kcore_buildid(from_dir, sbuildid)) + return -1; + + scnprintf(to_dir, sizeof(to_dir), "%s/[kernel.kcore]/%s", + buildid_dir, sbuildid); + + if (!force && + !build_id_cache__kcore_existing(from_dir, to_dir, sizeof(to_dir))) { + pr_debug("same kcore found in %s\n", to_dir); + return 0; + } + + if (build_id_cache__kcore_dir(dir, sizeof(dir))) + return -1; + + scnprintf(to_dir, sizeof(to_dir), "%s/[kernel.kcore]/%s/%s", + buildid_dir, sbuildid, dir); + + if (mkdir_p(to_dir, 0755)) + return -1; + + if (kcore_copy(from_dir, to_dir)) { + /* Remove YYYYmmddHHMMSShh directory */ + if (!rmdir(to_dir)) { + p = strrchr(to_dir, '/'); + if (p) + *p = '\0'; + /* Try to remove buildid directory */ + if (!rmdir(to_dir)) { + p = strrchr(to_dir, '/'); + if (p) + *p = '\0'; + /* Try to remove [kernel.kcore] directory */ + rmdir(to_dir); + } + } + return -1; + } + + pr_debug("kcore added to build-id cache directory %s\n", to_dir); + + return 0; +} + +static int build_id_cache__add_file(const char *filename) +{ + char sbuild_id[BUILD_ID_SIZE * 2 + 1]; + u8 build_id[BUILD_ID_SIZE]; + int err; + + if (filename__read_build_id(filename, &build_id, sizeof(build_id)) < 0) { + pr_debug("Couldn't read a build-id in %s\n", filename); + return -1; + } + + build_id__sprintf(build_id, sizeof(build_id), sbuild_id); + err = build_id_cache__add_s(sbuild_id, filename, + false, false); + pr_debug("Adding %s %s: %s\n", sbuild_id, filename, + err ? "FAIL" : "Ok"); + return err; +} + +static int build_id_cache__remove_file(const char *filename) +{ + u8 build_id[BUILD_ID_SIZE]; + char sbuild_id[BUILD_ID_SIZE * 2 + 1]; + + int err; + + if (filename__read_build_id(filename, &build_id, sizeof(build_id)) < 0) { + pr_debug("Couldn't read a build-id in %s\n", filename); + return -1; + } + + build_id__sprintf(build_id, sizeof(build_id), sbuild_id); + err = build_id_cache__remove_s(sbuild_id); + pr_debug("Removing %s %s: %s\n", sbuild_id, filename, + err ? "FAIL" : "Ok"); + + return err; +} + +static int build_id_cache__purge_path(const char *pathname) +{ + struct strlist *list; + struct str_node *pos; + int err; + + err = build_id_cache__list_build_ids(pathname, &list); + if (err) + goto out; + + strlist__for_each(pos, list) { + err = build_id_cache__remove_s(pos->s); + pr_debug("Removing %s %s: %s\n", pos->s, pathname, + err ? "FAIL" : "Ok"); + if (err) + break; + } + strlist__delete(list); + +out: + pr_debug("Purging %s: %s\n", pathname, err ? "FAIL" : "Ok"); + + return err; +} + +static bool dso__missing_buildid_cache(struct dso *dso, int parm __maybe_unused) +{ + char filename[PATH_MAX]; + u8 build_id[BUILD_ID_SIZE]; + + if (dso__build_id_filename(dso, filename, sizeof(filename)) && + filename__read_build_id(filename, build_id, + sizeof(build_id)) != sizeof(build_id)) { + if (errno == ENOENT) + return false; + + pr_warning("Problems with %s file, consider removing it from the cache\n", + filename); + } else if (memcmp(dso->build_id, build_id, sizeof(dso->build_id))) { + pr_warning("Problems with %s file, consider removing it from the cache\n", + filename); + } + + return true; +} + +static int build_id_cache__fprintf_missing(struct perf_session *session, FILE *fp) +{ + perf_session__fprintf_dsos_buildid(session, fp, dso__missing_buildid_cache, 0); + return 0; +} + +static int build_id_cache__update_file(const char *filename) +{ + u8 build_id[BUILD_ID_SIZE]; + char sbuild_id[BUILD_ID_SIZE * 2 + 1]; + + int err = 0; + + if (filename__read_build_id(filename, &build_id, sizeof(build_id)) < 0) { + pr_debug("Couldn't read a build-id in %s\n", filename); + return -1; + } + + build_id__sprintf(build_id, sizeof(build_id), sbuild_id); + if (build_id_cache__cached(sbuild_id)) + err = build_id_cache__remove_s(sbuild_id); + + if (!err) + err = build_id_cache__add_s(sbuild_id, filename, false, false); + + pr_debug("Updating %s %s: %s\n", sbuild_id, filename, + err ? "FAIL" : "Ok"); + + return err; +} + +int cmd_buildid_cache(int argc, const char **argv, + const char *prefix __maybe_unused) +{ + struct strlist *list; + struct str_node *pos; + int ret = 0; + bool force = false; + char const *add_name_list_str = NULL, + *remove_name_list_str = NULL, + *purge_name_list_str = NULL, + *missing_filename = NULL, + *update_name_list_str = NULL, + *kcore_filename = NULL; + char sbuf[STRERR_BUFSIZE]; + + struct perf_data_file file = { + .mode = PERF_DATA_MODE_READ, + }; + struct perf_session *session = NULL; + + const struct option buildid_cache_options[] = { + OPT_STRING('a', "add", &add_name_list_str, + "file list", "file(s) to add"), + OPT_STRING('k', "kcore", &kcore_filename, + "file", "kcore file to add"), + OPT_STRING('r', "remove", &remove_name_list_str, "file list", + "file(s) to remove"), + OPT_STRING('p', "purge", &purge_name_list_str, "path list", + "path(s) to remove (remove old caches too)"), + OPT_STRING('M', "missing", &missing_filename, "file", + "to find missing build ids in the cache"), + OPT_BOOLEAN('f', "force", &force, "don't complain, do it"), + OPT_STRING('u', "update", &update_name_list_str, "file list", + "file(s) to update"), + OPT_INCR('v', "verbose", &verbose, "be more verbose"), + OPT_END() + }; + const char * const buildid_cache_usage[] = { + "perf buildid-cache [<options>]", + NULL + }; + + argc = parse_options(argc, argv, buildid_cache_options, + buildid_cache_usage, 0); + + if (argc || (!add_name_list_str && !kcore_filename && + !remove_name_list_str && !purge_name_list_str && + !missing_filename && !update_name_list_str)) + usage_with_options(buildid_cache_usage, buildid_cache_options); + + if (missing_filename) { + file.path = missing_filename; + file.force = force; + + session = perf_session__new(&file, false, NULL); + if (session == NULL) + return -1; + } + + if (symbol__init(session ? &session->header.env : NULL) < 0) + goto out; + + setup_pager(); + + if (add_name_list_str) { + list = strlist__new(true, add_name_list_str); + if (list) { + strlist__for_each(pos, list) + if (build_id_cache__add_file(pos->s)) { + if (errno == EEXIST) { + pr_debug("%s already in the cache\n", + pos->s); + continue; + } + pr_warning("Couldn't add %s: %s\n", + pos->s, strerror_r(errno, sbuf, sizeof(sbuf))); + } + + strlist__delete(list); + } + } + + if (remove_name_list_str) { + list = strlist__new(true, remove_name_list_str); + if (list) { + strlist__for_each(pos, list) + if (build_id_cache__remove_file(pos->s)) { + if (errno == ENOENT) { + pr_debug("%s wasn't in the cache\n", + pos->s); + continue; + } + pr_warning("Couldn't remove %s: %s\n", + pos->s, strerror_r(errno, sbuf, sizeof(sbuf))); + } + + strlist__delete(list); + } + } + + if (purge_name_list_str) { + list = strlist__new(true, purge_name_list_str); + if (list) { + strlist__for_each(pos, list) + if (build_id_cache__purge_path(pos->s)) { + if (errno == ENOENT) { + pr_debug("%s wasn't in the cache\n", + pos->s); + continue; + } + pr_warning("Couldn't remove %s: %s\n", + pos->s, strerror_r(errno, sbuf, sizeof(sbuf))); + } + + strlist__delete(list); + } + } + + if (missing_filename) + ret = build_id_cache__fprintf_missing(session, stdout); + + if (update_name_list_str) { + list = strlist__new(true, update_name_list_str); + if (list) { + strlist__for_each(pos, list) + if (build_id_cache__update_file(pos->s)) { + if (errno == ENOENT) { + pr_debug("%s wasn't in the cache\n", + pos->s); + continue; + } + pr_warning("Couldn't update %s: %s\n", + pos->s, strerror_r(errno, sbuf, sizeof(sbuf))); + } + + strlist__delete(list); + } + } + + if (kcore_filename && build_id_cache__add_kcore(kcore_filename, force)) + pr_warning("Couldn't add %s\n", kcore_filename); + +out: + if (session) + perf_session__delete(session); + + return ret; +} |