[perf/core PATCH v6 0/3] perf-buildid-cache: Enhance --update and add --purge

[perf/core PATCH v6 0/3] perf-buildid-cache: Enhance --update and add --purge

[Masami Hiramatsu]

Hi,

Here is the 6th version of of perf buildid-cache update.
This updates the 1st and 2nd patches according to Arnaldo's comment.

Here are the changes in v6.

 - [1/3] Add verbose error message if failed to list buildid-dir.
         (this also updates build_id_cache__list_build_ids())
 - [2/3] Update for the previous change.

Thank you,


---

Masami Hiramatsu (3):
      perf buildid-cache: Add --purge FILE to remove all caches of FILE
      perf-buildid-cache: Use pr_debug instead of verbose && pr_info
      perf-buildid-cache: Show usage with incorrect params


 tools/perf/Documentation/perf-buildid-cache.txt |   13 ++-
 tools/perf/builtin-buildid-cache.c              |   66 ++++++++++++++--
 tools/perf/util/build-id.c                      |   93 +++++++++++++++++++----
 tools/perf/util/build-id.h                      |    3 +
 4 files changed, 145 insertions(+), 30 deletions(-)

--
Masami HIRAMATSU
Software Platform Research Dpt. Linux Technology Center
Hitachi, Ltd., Yokohama Research Laboratory
E-mail: masami.hiramatsu.pt@hitachi.com

[perf/core PATCH v6 1/3] perf buildid-cache: Add --purge FILE to remove all caches of FILE

[Masami Hiramatsu]

Add --purge FILE to remove all caches of FILE.
Since the current --remove FILE removes a cache which has
same build-id of given FILE. Since the command takes a
FILE path, it can confuse user who tries to remove cache
about FILE path.

  -----
  # ./perf buildid-cache -v --add ./perf
  Adding 133b7b5486d987a5ab5c3ebf4ea14941f45d4d4f ./perf: Ok
  # (update the ./perf binary)
  # ./perf buildid-cache -v --remove ./perf
  Removing 305bbd1be68f66eca7e2d78db294653031edfa79 ./perf: FAIL
  ./perf wasn't in the cache
  -----
Actually, the --remove's FAIL is not shown, it just silently fails.

So, this patch adds --purge FILE action for such usecase.
perf buildid-cache --purge FILE removes all caches which
has same FILE path.
In other words, it removes all caches including old binaries.

  -----
  # ./perf buildid-cache -v --add ./perf
  Adding 133b7b5486d987a5ab5c3ebf4ea14941f45d4d4f ./perf: Ok
  # (update the ./perf binary)
  # ./perf buildid-cache -v --purge ./perf
  Removing 133b7b5486d987a5ab5c3ebf4ea14941f45d4d4f ./perf: Ok
  -----

BTW, if you want to purge all the caches, remove ~/.debug/* .

Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
---
 tools/perf/Documentation/perf-buildid-cache.txt |   13 ++-
 tools/perf/builtin-buildid-cache.c              |   48 ++++++++++++
 tools/perf/util/build-id.c                      |   93 +++++++++++++++++++----
 tools/perf/util/build-id.h                      |    3 +
 4 files changed, 136 insertions(+), 21 deletions(-)

diff --git a/tools/perf/Documentation/perf-buildid-cache.txt b/tools/perf/Documentation/perf-buildid-cache.txt
index cec6b57..dd07b55 100644
--- a/tools/perf/Documentation/perf-buildid-cache.txt
+++ b/tools/perf/Documentation/perf-buildid-cache.txt
@@ -12,9 +12,9 @@ SYNOPSIS
 
 DESCRIPTION
 -----------
-This command manages the build-id cache. It can add and remove files to/from
-the cache. In the future it should as well purge older entries, set upper
-limits for the space used by the cache, etc.
+This command manages the build-id cache. It can add, remove, update and purge
+files to/from the cache. In the future it should as well set upper limits for
+the space used by the cache, etc.
 
 OPTIONS
 -------
@@ -36,7 +36,12 @@ OPTIONS
         actually made.
 -r::
 --remove=::
-        Remove specified file from the cache.
+        Remove a cached binary which has same build-id of specified file
+        from the cache.
+-p::
+--purge=::
+        Purge all cached binaries including older caches which have specified
+	path from the cache.
 -M::
 --missing=::
 	List missing build ids in the cache for the specified file.
diff --git a/tools/perf/builtin-buildid-cache.c b/tools/perf/builtin-buildid-cache.c
index e7568f5..86f9d78 100644
--- a/tools/perf/builtin-buildid-cache.c
+++ b/tools/perf/builtin-buildid-cache.c
@@ -223,6 +223,33 @@ static int build_id_cache__remove_file(const char *filename)
 	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);
+		if (verbose)
+			pr_info("Removing %s %s: %s\n", pos->s, pathname,
+				err ? "FAIL" : "Ok");
+		if (err)
+			break;
+	}
+	strlist__delete(list);
+
+out:
+	if (verbose)
+		pr_info("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];
@@ -285,6 +312,7 @@ int cmd_buildid_cache(int argc, const char **argv,
 	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;
@@ -302,6 +330,8 @@ int cmd_buildid_cache(int argc, const char **argv,
 		   "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"),
@@ -368,6 +398,24 @@ int cmd_buildid_cache(int argc, const char **argv,
 		}
 	}
 
+	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);
 
diff --git a/tools/perf/util/build-id.c b/tools/perf/util/build-id.c
index 0bc33be..5904fac 100644
--- a/tools/perf/util/build-id.c
+++ b/tools/perf/util/build-id.c
@@ -281,35 +281,93 @@ void disable_buildid_cache(void)
 	no_buildid_cache = true;
 }
 
+static char *build_id_cache__dirname_from_path(const char *name,
+					       bool is_kallsyms, bool is_vdso)
+{
+	char *realname = (char *)name, *filename;
+	bool slash = is_kallsyms || is_vdso;
+
+	if (!slash) {
+		realname = realpath(name, NULL);
+		if (!realname)
+			return NULL;
+	}
+
+	if (asprintf(&filename, "%s%s%s", buildid_dir, slash ? "/" : "",
+		     is_vdso ? DSO__NAME_VDSO : realname) < 0)
+		filename = NULL;
+
+	if (!slash)
+		free(realname);
+
+	return filename;
+}
+
+int build_id_cache__list_build_ids(const char *pathname,
+				   struct strlist **result)
+{
+	struct strlist *list;
+	char *dirname;
+	DIR *dir;
+	struct dirent *d;
+	int ret = 0;
+
+	list = strlist__new(true, NULL);
+	dirname = build_id_cache__dirname_from_path(pathname, false, false);
+	if (!list || !dirname) {
+		ret = -ENOMEM;
+		goto out;
+	}
+
+	/* List up all dirents */
+	dir = opendir(dirname);
+	if (!dir) {
+		ret = -errno;
+		goto out;
+	}
+
+	while ((d = readdir(dir)) != NULL) {
+		if (!strcmp(d->d_name, ".") || !strcmp(d->d_name, ".."))
+			continue;
+		strlist__add(list, d->d_name);
+	}
+	closedir(dir);
+
+out:
+	free(dirname);
+	if (ret)
+		strlist__delete(list);
+	else
+		*result = list;
+
+	return ret;
+}
+
 int build_id_cache__add_s(const char *sbuild_id, const char *name,
 			  bool is_kallsyms, bool is_vdso)
 {
 	const size_t size = PATH_MAX;
-	char *realname, *filename = zalloc(size),
+	char *realname = NULL, *filename = NULL, *dirname = NULL,
 	     *linkname = zalloc(size), *targetname, *tmp;
-	int len, err = -1;
-	bool slash = is_kallsyms || is_vdso;
+	int err = -1;
 
-	if (is_kallsyms) {
-		if (symbol_conf.kptr_restrict) {
-			pr_debug("Not caching a kptr_restrict'ed /proc/kallsyms\n");
-			err = 0;
-			goto out_free;
-		}
-		realname = (char *) name;
-	} else
+	if (!is_kallsyms) {
 		realname = realpath(name, NULL);
+		if (!realname)
+			goto out_free;
+	}
 
-	if (realname == NULL || filename == NULL || linkname == NULL)
+	dirname = build_id_cache__dirname_from_path(name, is_kallsyms, is_vdso);
+	if (!dirname)
 		goto out_free;
 
-	len = scnprintf(filename, size, "%s%s%s",
-		       buildid_dir, slash ? "/" : "",
-		       is_vdso ? DSO__NAME_VDSO : realname);
-	if (mkdir_p(filename, 0755))
+	if (mkdir_p(dirname, 0755))
 		goto out_free;
 
-	snprintf(filename + len, size - len, "/%s", sbuild_id);
+	if (asprintf(&filename, "%s/%s", dirname, sbuild_id) < 0) {
+		filename = NULL;
+		goto out_free;
+	}
 
 	if (access(filename, F_OK)) {
 		if (is_kallsyms) {
@@ -337,6 +395,7 @@ out_free:
 	if (!is_kallsyms)
 		free(realname);
 	free(filename);
+	free(dirname);
 	free(linkname);
 	return err;
 }
diff --git a/tools/perf/util/build-id.h b/tools/perf/util/build-id.h
index 2a09498..8501122 100644
--- a/tools/perf/util/build-id.h
+++ b/tools/perf/util/build-id.h
@@ -4,6 +4,7 @@
 #define BUILD_ID_SIZE 20
 
 #include "tool.h"
+#include "strlist.h"
 #include <linux/types.h>
 
 extern struct perf_tool build_id__mark_dso_hit_ops;
@@ -22,6 +23,8 @@ bool perf_session__read_build_ids(struct perf_session *session, bool with_hits);
 int perf_session__write_buildid_table(struct perf_session *session, int fd);
 int perf_session__cache_build_ids(struct perf_session *session);
 
+int build_id_cache__list_build_ids(const char *pathname,
+				   struct strlist **result);
 bool build_id_cache__cached(const char *sbuild_id);
 int build_id_cache__add_s(const char *sbuild_id,
 			  const char *name, bool is_kallsyms, bool is_vdso);

[perf/core PATCH v6 2/3] perf-buildid-cache: Use pr_debug instead of verbose && pr_info

[Masami Hiramatsu]

Use pr_debug instead of the combination of verbose and pr_info.

"if (verbose) pr_info(...)" is same as "pr_debug(...)", replace it.

Suggested-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
---
 tools/perf/builtin-buildid-cache.c |   23 +++++++++--------------
 1 file changed, 9 insertions(+), 14 deletions(-)

diff --git a/tools/perf/builtin-buildid-cache.c b/tools/perf/builtin-buildid-cache.c
index 86f9d78..04466c4 100644
--- a/tools/perf/builtin-buildid-cache.c
+++ b/tools/perf/builtin-buildid-cache.c
@@ -196,9 +196,8 @@ static int build_id_cache__add_file(const char *filename)
 	build_id__sprintf(build_id, sizeof(build_id), sbuild_id);
 	err = build_id_cache__add_s(sbuild_id, filename,
 				    false, false);
-	if (verbose)
-		pr_info("Adding %s %s: %s\n", sbuild_id, filename,
-			err ? "FAIL" : "Ok");
+	pr_debug("Adding %s %s: %s\n", sbuild_id, filename,
+		 err ? "FAIL" : "Ok");
 	return err;
 }
 
@@ -216,9 +215,8 @@ static int build_id_cache__remove_file(const char *filename)
 
 	build_id__sprintf(build_id, sizeof(build_id), sbuild_id);
 	err = build_id_cache__remove_s(sbuild_id);
-	if (verbose)
-		pr_info("Removing %s %s: %s\n", sbuild_id, filename,
-			err ? "FAIL" : "Ok");
+	pr_debug("Removing %s %s: %s\n", sbuild_id, filename,
+		 err ? "FAIL" : "Ok");
 
 	return err;
 }
@@ -235,17 +233,15 @@ static int build_id_cache__purge_path(const char *pathname)
 
 	strlist__for_each(pos, list) {
 		err = build_id_cache__remove_s(pos->s);
-		if (verbose)
-			pr_info("Removing %s %s: %s\n", pos->s, pathname,
-				err ? "FAIL" : "Ok");
+		pr_debug("Removing %s %s: %s\n", pos->s, pathname,
+			 err ? "FAIL" : "Ok");
 		if (err)
 			break;
 	}
 	strlist__delete(list);
 
 out:
-	if (verbose)
-		pr_info("Purging %s: %s\n", pathname, err ? "FAIL" : "Ok");
+	pr_debug("Purging %s: %s\n", pathname, err ? "FAIL" : "Ok");
 
 	return err;
 }
@@ -296,9 +292,8 @@ static int build_id_cache__update_file(const char *filename)
 	if (!err)
 		err = build_id_cache__add_s(sbuild_id, filename, false, false);
 
-	if (verbose)
-		pr_info("Updating %s %s: %s\n", sbuild_id, filename,
-			err ? "FAIL" : "Ok");
+	pr_debug("Updating %s %s: %s\n", sbuild_id, filename,
+		 err ? "FAIL" : "Ok");
 
 	return err;
 }

[perf/core PATCH v6 3/3] perf-buildid-cache: Show usage with incorrect params

[Masami Hiramatsu]

Show usage if no action is specified or unexpected parameter
is given. In other words, be more user friendly.

Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
---
 tools/perf/builtin-buildid-cache.c |    5 +++++
 1 file changed, 5 insertions(+)

diff --git a/tools/perf/builtin-buildid-cache.c b/tools/perf/builtin-buildid-cache.c
index 04466c4..d47a0cd 100644
--- a/tools/perf/builtin-buildid-cache.c
+++ b/tools/perf/builtin-buildid-cache.c
@@ -343,6 +343,11 @@ int cmd_buildid_cache(int argc, const char **argv,
 	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;

Re: [perf/core PATCH v6 0/3] perf-buildid-cache: Enhance --update and add --purge

[Arnaldo Carvalho de Melo]

Em Fri, Feb 27, 2015 at 01:50:24PM +0900, Masami Hiramatsu escreveu:
> Hi,
> 
> Here is the 6th version of of perf buildid-cache update.
> This updates the 1st and 2nd patches according to Arnaldo's comment.
> 
> Here are the changes in v6.
> 
>  - [1/3] Add verbose error message if failed to list buildid-dir.
>          (this also updates build_id_cache__list_build_ids())
>  - [2/3] Update for the previous change.

Applied, that silent failure when strlist__new() fails was there for
other string list arguments, will fix that in a separate patch...

- Arnaldo

[tip:perf/core] perf buildid-cache: Add --purge FILE to remove all caches of FILE

[tip-bot for Masami Hiramatsu]

Commit-ID:  8d8c8e4cb3014fcc51f0e127b4316043306f5bb0
Gitweb:     http://git.kernel.org/tip/8d8c8e4cb3014fcc51f0e127b4316043306f5bb0
Author:     Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
AuthorDate: Fri, 27 Feb 2015 13:50:26 +0900
Committer:  Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Fri, 27 Feb 2015 15:52:33 -0300

perf buildid-cache: Add --purge FILE to remove all caches of FILE

Add --purge FILE to remove all caches of FILE.

Since the current --remove FILE removes a cache which has
same build-id of given FILE. Since the command takes a
FILE path, it can confuse user who tries to remove cache
about FILE path.

  -----
  # ./perf buildid-cache -v --add ./perf
  Adding 133b7b5486d987a5ab5c3ebf4ea14941f45d4d4f ./perf: Ok
  # (update the ./perf binary)
  # ./perf buildid-cache -v --remove ./perf
  Removing 305bbd1be68f66eca7e2d78db294653031edfa79 ./perf: FAIL
  ./perf wasn't in the cache
  -----
Actually, the --remove's FAIL is not shown, it just silently fails.

So, this patch adds --purge FILE action for such usecase.

perf buildid-cache --purge FILE removes all caches which has same FILE
path.

In other words, it removes all caches including old binaries.

  -----
  # ./perf buildid-cache -v --add ./perf
  Adding 133b7b5486d987a5ab5c3ebf4ea14941f45d4d4f ./perf: Ok
  # (update the ./perf binary)
  # ./perf buildid-cache -v --purge ./perf
  Removing 133b7b5486d987a5ab5c3ebf4ea14941f45d4d4f ./perf: Ok
  -----

BTW, if you want to purge all the caches, remove ~/.debug/* .

Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: Hemant Kumar <hemant@linux.vnet.ibm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20150227045026.1999.64084.stgit@localhost.localdomain
[ s/dirname/dir_name/g to fix build on fedora14, where dirname is a global ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/Documentation/perf-buildid-cache.txt | 13 ++--
 tools/perf/builtin-buildid-cache.c              | 48 +++++++++++++
 tools/perf/util/build-id.c                      | 93 ++++++++++++++++++++-----
 tools/perf/util/build-id.h                      |  3 +
 4 files changed, 136 insertions(+), 21 deletions(-)

diff --git a/tools/perf/Documentation/perf-buildid-cache.txt b/tools/perf/Documentation/perf-buildid-cache.txt
index cec6b57..dd07b55 100644
--- a/tools/perf/Documentation/perf-buildid-cache.txt
+++ b/tools/perf/Documentation/perf-buildid-cache.txt
@@ -12,9 +12,9 @@ SYNOPSIS
 
 DESCRIPTION
 -----------
-This command manages the build-id cache. It can add and remove files to/from
-the cache. In the future it should as well purge older entries, set upper
-limits for the space used by the cache, etc.
+This command manages the build-id cache. It can add, remove, update and purge
+files to/from the cache. In the future it should as well set upper limits for
+the space used by the cache, etc.
 
 OPTIONS
 -------
@@ -36,7 +36,12 @@ OPTIONS
         actually made.
 -r::
 --remove=::
-        Remove specified file from the cache.
+        Remove a cached binary which has same build-id of specified file
+        from the cache.
+-p::
+--purge=::
+        Purge all cached binaries including older caches which have specified
+	path from the cache.
 -M::
 --missing=::
 	List missing build ids in the cache for the specified file.
diff --git a/tools/perf/builtin-buildid-cache.c b/tools/perf/builtin-buildid-cache.c
index e7568f5..86f9d78 100644
--- a/tools/perf/builtin-buildid-cache.c
+++ b/tools/perf/builtin-buildid-cache.c
@@ -223,6 +223,33 @@ static int build_id_cache__remove_file(const char *filename)
 	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);
+		if (verbose)
+			pr_info("Removing %s %s: %s\n", pos->s, pathname,
+				err ? "FAIL" : "Ok");
+		if (err)
+			break;
+	}
+	strlist__delete(list);
+
+out:
+	if (verbose)
+		pr_info("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];
@@ -285,6 +312,7 @@ int cmd_buildid_cache(int argc, const char **argv,
 	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;
@@ -302,6 +330,8 @@ int cmd_buildid_cache(int argc, const char **argv,
 		   "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"),
@@ -368,6 +398,24 @@ int cmd_buildid_cache(int argc, const char **argv,
 		}
 	}
 
+	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);
 
diff --git a/tools/perf/util/build-id.c b/tools/perf/util/build-id.c
index 0bc33be..ffdc338 100644
--- a/tools/perf/util/build-id.c
+++ b/tools/perf/util/build-id.c
@@ -281,35 +281,93 @@ void disable_buildid_cache(void)
 	no_buildid_cache = true;
 }
 
+static char *build_id_cache__dirname_from_path(const char *name,
+					       bool is_kallsyms, bool is_vdso)
+{
+	char *realname = (char *)name, *filename;
+	bool slash = is_kallsyms || is_vdso;
+
+	if (!slash) {
+		realname = realpath(name, NULL);
+		if (!realname)
+			return NULL;
+	}
+
+	if (asprintf(&filename, "%s%s%s", buildid_dir, slash ? "/" : "",
+		     is_vdso ? DSO__NAME_VDSO : realname) < 0)
+		filename = NULL;
+
+	if (!slash)
+		free(realname);
+
+	return filename;
+}
+
+int build_id_cache__list_build_ids(const char *pathname,
+				   struct strlist **result)
+{
+	struct strlist *list;
+	char *dir_name;
+	DIR *dir;
+	struct dirent *d;
+	int ret = 0;
+
+	list = strlist__new(true, NULL);
+	dir_name = build_id_cache__dirname_from_path(pathname, false, false);
+	if (!list || !dir_name) {
+		ret = -ENOMEM;
+		goto out;
+	}
+
+	/* List up all dirents */
+	dir = opendir(dir_name);
+	if (!dir) {
+		ret = -errno;
+		goto out;
+	}
+
+	while ((d = readdir(dir)) != NULL) {
+		if (!strcmp(d->d_name, ".") || !strcmp(d->d_name, ".."))
+			continue;
+		strlist__add(list, d->d_name);
+	}
+	closedir(dir);
+
+out:
+	free(dir_name);
+	if (ret)
+		strlist__delete(list);
+	else
+		*result = list;
+
+	return ret;
+}
+
 int build_id_cache__add_s(const char *sbuild_id, const char *name,
 			  bool is_kallsyms, bool is_vdso)
 {
 	const size_t size = PATH_MAX;
-	char *realname, *filename = zalloc(size),
+	char *realname = NULL, *filename = NULL, *dir_name = NULL,
 	     *linkname = zalloc(size), *targetname, *tmp;
-	int len, err = -1;
-	bool slash = is_kallsyms || is_vdso;
+	int err = -1;
 
-	if (is_kallsyms) {
-		if (symbol_conf.kptr_restrict) {
-			pr_debug("Not caching a kptr_restrict'ed /proc/kallsyms\n");
-			err = 0;
-			goto out_free;
-		}
-		realname = (char *) name;
-	} else
+	if (!is_kallsyms) {
 		realname = realpath(name, NULL);
+		if (!realname)
+			goto out_free;
+	}
 
-	if (realname == NULL || filename == NULL || linkname == NULL)
+	dir_name = build_id_cache__dirname_from_path(name, is_kallsyms, is_vdso);
+	if (!dir_name)
 		goto out_free;
 
-	len = scnprintf(filename, size, "%s%s%s",
-		       buildid_dir, slash ? "/" : "",
-		       is_vdso ? DSO__NAME_VDSO : realname);
-	if (mkdir_p(filename, 0755))
+	if (mkdir_p(dir_name, 0755))
 		goto out_free;
 
-	snprintf(filename + len, size - len, "/%s", sbuild_id);
+	if (asprintf(&filename, "%s/%s", dir_name, sbuild_id) < 0) {
+		filename = NULL;
+		goto out_free;
+	}
 
 	if (access(filename, F_OK)) {
 		if (is_kallsyms) {
@@ -337,6 +395,7 @@ out_free:
 	if (!is_kallsyms)
 		free(realname);
 	free(filename);
+	free(dir_name);
 	free(linkname);
 	return err;
 }
diff --git a/tools/perf/util/build-id.h b/tools/perf/util/build-id.h
index 2a09498..8501122 100644
--- a/tools/perf/util/build-id.h
+++ b/tools/perf/util/build-id.h
@@ -4,6 +4,7 @@
 #define BUILD_ID_SIZE 20
 
 #include "tool.h"
+#include "strlist.h"
 #include <linux/types.h>
 
 extern struct perf_tool build_id__mark_dso_hit_ops;
@@ -22,6 +23,8 @@ bool perf_session__read_build_ids(struct perf_session *session, bool with_hits);
 int perf_session__write_buildid_table(struct perf_session *session, int fd);
 int perf_session__cache_build_ids(struct perf_session *session);
 
+int build_id_cache__list_build_ids(const char *pathname,
+				   struct strlist **result);
 bool build_id_cache__cached(const char *sbuild_id);
 int build_id_cache__add_s(const char *sbuild_id,
 			  const char *name, bool is_kallsyms, bool is_vdso);

[tip:perf/core] perf buildid-cache: Use pr_debug instead of verbose && pr_info

[tip-bot for Masami Hiramatsu]

Commit-ID:  cc169c7c31253e80e0d504f0cd5dbb9f1e3d3ac5
Gitweb:     http://git.kernel.org/tip/cc169c7c31253e80e0d504f0cd5dbb9f1e3d3ac5
Author:     Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
AuthorDate: Fri, 27 Feb 2015 13:50:28 +0900
Committer:  Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Fri, 27 Feb 2015 15:52:36 -0300

perf buildid-cache: Use pr_debug instead of verbose && pr_info

Use pr_debug instead of the combination of verbose and pr_info.

"if (verbose) pr_info(...)" is same as "pr_debug(...)", replace it.

Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Suggested-by: Namhyung Kim <namhyung@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: Hemant Kumar <hemant@linux.vnet.ibm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20150227045028.1999.93137.stgit@localhost.localdomain
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/builtin-buildid-cache.c | 23 +++++++++--------------
 1 file changed, 9 insertions(+), 14 deletions(-)

diff --git a/tools/perf/builtin-buildid-cache.c b/tools/perf/builtin-buildid-cache.c
index 86f9d78..04466c4 100644
--- a/tools/perf/builtin-buildid-cache.c
+++ b/tools/perf/builtin-buildid-cache.c
@@ -196,9 +196,8 @@ static int build_id_cache__add_file(const char *filename)
 	build_id__sprintf(build_id, sizeof(build_id), sbuild_id);
 	err = build_id_cache__add_s(sbuild_id, filename,
 				    false, false);
-	if (verbose)
-		pr_info("Adding %s %s: %s\n", sbuild_id, filename,
-			err ? "FAIL" : "Ok");
+	pr_debug("Adding %s %s: %s\n", sbuild_id, filename,
+		 err ? "FAIL" : "Ok");
 	return err;
 }
 
@@ -216,9 +215,8 @@ static int build_id_cache__remove_file(const char *filename)
 
 	build_id__sprintf(build_id, sizeof(build_id), sbuild_id);
 	err = build_id_cache__remove_s(sbuild_id);
-	if (verbose)
-		pr_info("Removing %s %s: %s\n", sbuild_id, filename,
-			err ? "FAIL" : "Ok");
+	pr_debug("Removing %s %s: %s\n", sbuild_id, filename,
+		 err ? "FAIL" : "Ok");
 
 	return err;
 }
@@ -235,17 +233,15 @@ static int build_id_cache__purge_path(const char *pathname)
 
 	strlist__for_each(pos, list) {
 		err = build_id_cache__remove_s(pos->s);
-		if (verbose)
-			pr_info("Removing %s %s: %s\n", pos->s, pathname,
-				err ? "FAIL" : "Ok");
+		pr_debug("Removing %s %s: %s\n", pos->s, pathname,
+			 err ? "FAIL" : "Ok");
 		if (err)
 			break;
 	}
 	strlist__delete(list);
 
 out:
-	if (verbose)
-		pr_info("Purging %s: %s\n", pathname, err ? "FAIL" : "Ok");
+	pr_debug("Purging %s: %s\n", pathname, err ? "FAIL" : "Ok");
 
 	return err;
 }
@@ -296,9 +292,8 @@ static int build_id_cache__update_file(const char *filename)
 	if (!err)
 		err = build_id_cache__add_s(sbuild_id, filename, false, false);
 
-	if (verbose)
-		pr_info("Updating %s %s: %s\n", sbuild_id, filename,
-			err ? "FAIL" : "Ok");
+	pr_debug("Updating %s %s: %s\n", sbuild_id, filename,
+		 err ? "FAIL" : "Ok");
 
 	return err;
 }

[tip:perf/core] perf buildid-cache: Show usage with incorrect params

[tip-bot for Masami Hiramatsu]

Commit-ID:  0497d0a8201a38f0c95edc8a1fc0325f2f879ddb
Gitweb:     http://git.kernel.org/tip/0497d0a8201a38f0c95edc8a1fc0325f2f879ddb
Author:     Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
AuthorDate: Fri, 27 Feb 2015 13:50:31 +0900
Committer:  Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Fri, 27 Feb 2015 15:52:40 -0300

perf buildid-cache: Show usage with incorrect params

Show usage if no action is specified or unexpected parameter is given.
In other words, be more user friendly.

Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: Hemant Kumar <hemant@linux.vnet.ibm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20150227045030.1999.44006.stgit@localhost.localdomain
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/builtin-buildid-cache.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/tools/perf/builtin-buildid-cache.c b/tools/perf/builtin-buildid-cache.c
index 04466c4..d47a0cd 100644
--- a/tools/perf/builtin-buildid-cache.c
+++ b/tools/perf/builtin-buildid-cache.c
@@ -343,6 +343,11 @@ int cmd_buildid_cache(int argc, const char **argv,
 	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;