tools/perf/builtin-buildid-cache.c - kernel/msm-4.9 - Gitiles

 /*
  * 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, const char *debugdir,
 				     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",
 		  debugdir, 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",
 		  debugdir, 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, const char *debugdir)
 {
 	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, debugdir, filename,
 				    false, false);
 	if (verbose)
 		pr_info("Adding %s %s: %s\n", sbuild_id, filename,
 			err ? "FAIL" : "Ok");
 	return err;
 }

 static int build_id_cache__remove_file(const char *filename,
 				       const char *debugdir)
 {
 	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, debugdir);
 	if (verbose)
 		pr_info("Removing %s %s: %s\n", sbuild_id, filename,
 			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(const char *filename, bool force, FILE *fp)
 {
 	struct perf_data_file file = {
 		.path  = filename,
 		.mode  = PERF_DATA_MODE_READ,
 		.force = force,
 	};
 	struct perf_session *session = perf_session__new(&file, false, NULL);
 	if (session == NULL)
 		return -1;

 	perf_session__fprintf_dsos_buildid(session, fp, dso__missing_buildid_cache, 0);
 	perf_session__delete(session);

 	return 0;
 }

 static int build_id_cache__update_file(const char *filename,
 				       const char *debugdir)
 {
 	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, debugdir);
 	if (!err) {
 		err = build_id_cache__add_s(sbuild_id, debugdir, filename,
 					    false, false);
 	}
 	if (verbose)
 		pr_info("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 debugdir[PATH_MAX];
 	char const *add_name_list_str = NULL,
 		   *remove_name_list_str = NULL,
 		   *missing_filename = NULL,
 		   *update_name_list_str = NULL,
 		   *kcore_filename;

 	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('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 (symbol__init() < 0)
 		return -1;

 	setup_pager();

 	snprintf(debugdir, sizeof(debugdir), "%s", buildid_dir);

 	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, debugdir)) {
 					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(errno));
 				}

 			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, debugdir)) {
 					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(errno));
 				}

 			strlist__delete(list);
 		}
 	}

 	if (missing_filename)
 		ret = build_id_cache__fprintf_missing(missing_filename, force, 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, debugdir)) {
 					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(errno));
 				}

 			strlist__delete(list);
 		}
 	}

 	if (kcore_filename &&
 	    build_id_cache__add_kcore(kcore_filename, debugdir, force))
 		pr_warning("Couldn't add %s\n", kcore_filename);

 	return ret;
 }
	/*
	* 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, const char debugdir,
	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",
	debugdir, 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",
	debugdir, 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, const char debugdir)
	{
	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, debugdir, filename,
	false, false);
	if (verbose)
	pr_info("Adding %s %s: %s\n", sbuild_id, filename,
	err ? "FAIL" : "Ok");
	return err;
	}

	static int build_id_cache__remove_file(const char *filename,
	const char *debugdir)
	{
	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, debugdir);
	if (verbose)
	pr_info("Removing %s %s: %s\n", sbuild_id, filename,
	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(const char filename, bool force, FILE fp)
	{
	struct perf_data_file file = {
	.path = filename,
	.mode = PERF_DATA_MODE_READ,
	.force = force,
	};
	struct perf_session *session = perf_session__new(&file, false, NULL);
	if (session == NULL)
	return -1;

	perf_session__fprintf_dsos_buildid(session, fp, dso__missing_buildid_cache, 0);
	perf_session__delete(session);

	return 0;
	}

	static int build_id_cache__update_file(const char *filename,
	const char *debugdir)
	{
	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, debugdir);
	if (!err) {
	err = build_id_cache__add_s(sbuild_id, debugdir, filename,
	false, false);
	}
	if (verbose)
	pr_info("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 debugdir[PATH_MAX];
	char const *add_name_list_str = NULL,
	*remove_name_list_str = NULL,
	*missing_filename = NULL,
	*update_name_list_str = NULL,
	*kcore_filename;

	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('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 (symbol__init() < 0)
	return -1;

	setup_pager();

	snprintf(debugdir, sizeof(debugdir), "%s", buildid_dir);

	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, debugdir)) {
	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(errno));
	}

	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, debugdir)) {
	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(errno));
	}

	strlist__delete(list);
	}
	}

	if (missing_filename)
	ret = build_id_cache__fprintf_missing(missing_filename, force, 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, debugdir)) {
	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(errno));
	}

	strlist__delete(list);
	}
	}

	if (kcore_filename &&
	build_id_cache__add_kcore(kcore_filename, debugdir, force))
	pr_warning("Couldn't add %s\n", kcore_filename);

	return ret;
	}