v4.19.13 snapshot.
diff --git a/tools/perf/builtin-buildid-cache.c b/tools/perf/builtin-buildid-cache.c
new file mode 100644
index 0000000..115110a
--- /dev/null
+++ b/tools/perf/builtin-buildid-cache.c
@@ -0,0 +1,527 @@
+// 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 "perf.h"
+#include "namespaces.h"
+#include "util/cache.h"
+#include "util/debug.h"
+#include "util/header.h"
+#include <subcmd/parse-options.h>
+#include "util/strlist.h"
+#include "util/build-id.h"
+#include "util/session.h"
+#include "util/symbol.h"
+#include "util/time-utils.h"
+#include "util/probe-file.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];
+ u8 build_id[BUILD_ID_SIZE];
+ int err;
+ struct nscookie nsc;
+
+ nsinfo__mountns_enter(nsi, &nsc);
+ err = filename__read_build_id(filename, &build_id, sizeof(build_id));
+ nsinfo__mountns_exit(&nsc);
+ if (err < 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, 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)
+{
+ u8 build_id[BUILD_ID_SIZE];
+ char sbuild_id[SBUILD_ID_SIZE];
+ struct nscookie nsc;
+
+ int err;
+
+ nsinfo__mountns_enter(nsi, &nsc);
+ err = filename__read_build_id(filename, &build_id, sizeof(build_id));
+ nsinfo__mountns_exit(&nsc);
+ if (err < 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 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];
+ u8 build_id[BUILD_ID_SIZE];
+
+ if (dso__build_id_filename(dso, filename, sizeof(filename), false) &&
+ 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, struct nsinfo *nsi)
+{
+ u8 build_id[BUILD_ID_SIZE];
+ char sbuild_id[SBUILD_ID_SIZE];
+ struct nscookie nsc;
+
+ int err;
+
+ nsinfo__mountns_enter(nsi, &nsc);
+ err = filename__read_build_id(filename, &build_id, sizeof(build_id));
+ 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(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, 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;
+}
+
+int cmd_buildid_cache(int argc, const char **argv)
+{
+ struct strlist *list;
+ struct str_node *pos;
+ int ret = 0;
+ int 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;
+ 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_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
+ };
+
+ 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);
+
+ /* -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.file.path = missing_filename;
+ data.force = force;
+
+ session = perf_session__new(&data, false, NULL);
+ if (session == NULL)
+ return -1;
+ }
+
+ 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;
+}