diff options
Diffstat (limited to '')
| -rw-r--r-- | tools/perf/builtin-buildid-cache.c | 554 |
1 files changed, 554 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..cd3816936 --- /dev/null +++ b/tools/perf/builtin-buildid-cache.c @@ -0,0 +1,554 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * 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 <errno.h> +#include <unistd.h> +#include "builtin.h" +#include "namespaces.h" +#include "util/debug.h" +#include "util/header.h" +#include <subcmd/pager.h> +#include <subcmd/parse-options.h> +#include "util/strlist.h" +#include "util/build-id.h" +#include "util/session.h" +#include "util/dso.h" +#include "util/symbol.h" +#include "util/time-utils.h" +#include "util/util.h" +#include "util/probe-file.h" +#include "util/config.h" +#include <linux/string.h> +#include <linux/err.h> + +static int build_id_cache__kcore_buildid(const char *proc_dir, char *sbuildid) +{ + char root_dir[PATH_MAX]; + char *p; + + strlcpy(root_dir, proc_dir, sizeof(root_dir)); + + p = strrchr(root_dir, '/'); + if (!p) + return -1; + *p = '\0'; + return sysfs__sprintf_build_id(root_dir, sbuildid); +} + +static int build_id_cache__kcore_dir(char *dir, size_t sz) +{ + return fetch_current_timestamp(dir, sz); +} + +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, err = -1; + + 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++) { + err = kallsyms__get_function_start(from, name, &addr1); + if (!err) + break; + } + + if (err) + return false; + + if (kallsyms__get_function_start(to, name, &addr2)) + return false; + + 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[SBUILD_ID_SIZE]; + 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) < 0) + return -1; + + scnprintf(to_dir, sizeof(to_dir), "%s/%s/%s", + buildid_dir, DSO__NAME_KCORE, 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/%s/%s/%s", + buildid_dir, DSO__NAME_KCORE, 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, struct nsinfo *nsi) +{ + char sbuild_id[SBUILD_ID_SIZE]; + struct build_id bid; + int err; + struct nscookie nsc; + + nsinfo__mountns_enter(nsi, &nsc); + err = filename__read_build_id(filename, &bid); + nsinfo__mountns_exit(&nsc); + if (err < 0) { + pr_debug("Couldn't read a build-id in %s\n", filename); + return -1; + } + + build_id__sprintf(&bid, sbuild_id); + err = build_id_cache__add_s(sbuild_id, filename, nsi, + 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, struct nsinfo *nsi) +{ + char sbuild_id[SBUILD_ID_SIZE]; + struct build_id bid; + struct nscookie nsc; + + int err; + + nsinfo__mountns_enter(nsi, &nsc); + err = filename__read_build_id(filename, &bid); + nsinfo__mountns_exit(&nsc); + if (err < 0) { + pr_debug("Couldn't read a build-id in %s\n", filename); + return -1; + } + + build_id__sprintf(&bid, 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 nsinfo *nsi) +{ + struct strlist *list; + struct str_node *pos; + int err; + + err = build_id_cache__list_build_ids(pathname, nsi, &list); + if (err) + goto out; + + strlist__for_each_entry(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 int build_id_cache__purge_all(void) +{ + struct strlist *list; + struct str_node *pos; + int err = 0; + char *buf; + + list = build_id_cache__list_all(false); + if (!list) { + pr_debug("Failed to get buildids: -%d\n", errno); + return -EINVAL; + } + + strlist__for_each_entry(pos, list) { + buf = build_id_cache__origname(pos->s); + err = build_id_cache__remove_s(pos->s); + pr_debug("Removing %s (%s): %s\n", buf, pos->s, + err ? "FAIL" : "Ok"); + free(buf); + if (err) + break; + } + strlist__delete(list); + + pr_debug("Purged all: %s\n", err ? "FAIL" : "Ok"); + return err; +} + +static bool dso__missing_buildid_cache(struct dso *dso, int parm __maybe_unused) +{ + char filename[PATH_MAX]; + struct build_id bid; + + if (dso__build_id_filename(dso, filename, sizeof(filename), false) && + filename__read_build_id(filename, &bid) == -1) { + if (errno == ENOENT) + return false; + + pr_warning("Problems with %s file, consider removing it from the cache\n", + filename); + } else if (memcmp(dso->bid.data, bid.data, bid.size)) { + 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, struct nsinfo *nsi) +{ + char sbuild_id[SBUILD_ID_SIZE]; + struct build_id bid; + struct nscookie nsc; + + int err; + + nsinfo__mountns_enter(nsi, &nsc); + err = filename__read_build_id(filename, &bid); + nsinfo__mountns_exit(&nsc); + if (err < 0) { + pr_debug("Couldn't read a build-id in %s\n", filename); + return -1; + } + err = 0; + + build_id__sprintf(&bid, 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, nsi, false, + false); + + pr_debug("Updating %s %s: %s\n", sbuild_id, filename, + err ? "FAIL" : "Ok"); + + return err; +} + +static int build_id_cache__show_all(void) +{ + struct strlist *bidlist; + struct str_node *nd; + char *buf; + + bidlist = build_id_cache__list_all(true); + if (!bidlist) { + pr_debug("Failed to get buildids: -%d\n", errno); + return -1; + } + strlist__for_each_entry(nd, bidlist) { + buf = build_id_cache__origname(nd->s); + fprintf(stdout, "%s %s\n", nd->s, buf); + free(buf); + } + strlist__delete(bidlist); + return 0; +} + +static int perf_buildid_cache_config(const char *var, const char *value, void *cb) +{ + struct perf_debuginfod *di = cb; + + if (!strcmp(var, "buildid-cache.debuginfod")) { + di->urls = strdup(value); + if (!di->urls) + return -ENOMEM; + di->set = true; + } + + return 0; +} + +int cmd_buildid_cache(int argc, const char **argv) +{ + struct strlist *list; + struct str_node *pos; + int ret, ns_id = -1; + bool force = false; + bool list_files = false; + bool opts_flag = false; + bool purge_all = 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; + struct perf_debuginfod debuginfod = { }; + char sbuf[STRERR_BUFSIZE]; + + struct perf_data data = { + .mode = PERF_DATA_MODE_READ, + }; + struct perf_session *session = NULL; + struct nsinfo *nsi = 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, "file list", + "file(s) to remove (remove old caches too)"), + OPT_BOOLEAN('P', "purge-all", &purge_all, "purge all cached files"), + OPT_BOOLEAN('l', "list", &list_files, "list all cached files"), + 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_STRING_OPTARG_SET(0, "debuginfod", &debuginfod.urls, + &debuginfod.set, "debuginfod urls", + "Enable debuginfod data retrieval from DEBUGINFOD_URLS or specified urls", + "system"), + OPT_INCR('v', "verbose", &verbose, "be more verbose"), + OPT_INTEGER(0, "target-ns", &ns_id, "target pid for namespace context"), + OPT_END() + }; + const char * const buildid_cache_usage[] = { + "perf buildid-cache [<options>]", + NULL + }; + + ret = perf_config(perf_buildid_cache_config, &debuginfod); + if (ret) + return ret; + + argc = parse_options(argc, argv, buildid_cache_options, + buildid_cache_usage, 0); + + opts_flag = add_name_list_str || kcore_filename || + remove_name_list_str || purge_name_list_str || + missing_filename || update_name_list_str || + purge_all; + + if (argc || !(list_files || opts_flag)) + usage_with_options(buildid_cache_usage, buildid_cache_options); + + perf_debuginfod_setup(&debuginfod); + + /* -l is exclusive. It can not be used with other options. */ + if (list_files && opts_flag) { + usage_with_options_msg(buildid_cache_usage, + buildid_cache_options, "-l is exclusive.\n"); + } + + if (ns_id > 0) + nsi = nsinfo__new(ns_id); + + if (missing_filename) { + data.path = missing_filename; + data.force = force; + + session = perf_session__new(&data, NULL); + if (IS_ERR(session)) + return PTR_ERR(session); + } + + if (symbol__init(session ? &session->header.env : NULL) < 0) + goto out; + + setup_pager(); + + if (list_files) { + ret = build_id_cache__show_all(); + goto out; + } + + if (add_name_list_str) { + list = strlist__new(add_name_list_str, NULL); + if (list) { + strlist__for_each_entry(pos, list) + if (build_id_cache__add_file(pos->s, nsi)) { + if (errno == EEXIST) { + pr_debug("%s already in the cache\n", + pos->s); + continue; + } + pr_warning("Couldn't add %s: %s\n", + pos->s, str_error_r(errno, sbuf, sizeof(sbuf))); + } + + strlist__delete(list); + } + } + + if (remove_name_list_str) { + list = strlist__new(remove_name_list_str, NULL); + if (list) { + strlist__for_each_entry(pos, list) + if (build_id_cache__remove_file(pos->s, nsi)) { + 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, str_error_r(errno, sbuf, sizeof(sbuf))); + } + + strlist__delete(list); + } + } + + if (purge_name_list_str) { + list = strlist__new(purge_name_list_str, NULL); + if (list) { + strlist__for_each_entry(pos, list) + if (build_id_cache__purge_path(pos->s, nsi)) { + 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, str_error_r(errno, sbuf, sizeof(sbuf))); + } + + strlist__delete(list); + } + } + + if (purge_all) { + if (build_id_cache__purge_all()) { + pr_warning("Couldn't remove some caches. Error: %s.\n", + str_error_r(errno, sbuf, sizeof(sbuf))); + } + } + + if (missing_filename) + ret = build_id_cache__fprintf_missing(session, stdout); + + if (update_name_list_str) { + list = strlist__new(update_name_list_str, NULL); + if (list) { + strlist__for_each_entry(pos, list) + if (build_id_cache__update_file(pos->s, nsi)) { + 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, str_error_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: + perf_session__delete(session); + nsinfo__zput(nsi); + + return ret; +} |