From: Arnaldo Carvalho de Melo <acme@kernel.org>
To: Ingo Molnar <mingo@kernel.org>
Cc: linux-kernel@vger.kernel.org,
Arnaldo Carvalho de Melo <acme@redhat.com>,
Adrian Hunter <adrian.hunter@intel.com>,
David Ahern <dsahern@gmail.com>, Jiri Olsa <jolsa@kernel.org>,
Namhyung Kim <namhyung@kernel.org>,
Wang Nan <wangnan0@huawei.com>
Subject: [PATCH 01/19] perf script: Use readdir() instead of deprecated readdir_r()
Date: Mon, 11 Apr 2016 22:53:32 -0300 [thread overview]
Message-ID: <1460426030-27319-2-git-send-email-acme@kernel.org> (raw)
In-Reply-To: <1460426030-27319-1-git-send-email-acme@kernel.org>
From: Arnaldo Carvalho de Melo <acme@redhat.com>
The readdir() function is thread safe as long as just one thread uses a
DIR, which is the case in 'perf script', so, to avoid breaking the build
with glibc-2.23.90 (upcoming 2.24), use it instead of readdir_r().
See: http://man7.org/linux/man-pages/man3/readdir.3.html
"However, in modern implementations (including the glibc implementation),
concurrent calls to readdir() that specify different directory streams
are thread-safe. In cases where multiple threads must read from the
same directory stream, using readdir() with external synchronization is
still preferable to the use of the deprecated readdir_r(3) function."
Noticed while building on a Fedora Rawhide docker container.
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-mt3xz7n2hl49ni2vx7kuq74g@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/builtin-script.c | 70 ++++++++++++++++++++++-----------------------
1 file changed, 34 insertions(+), 36 deletions(-)
diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index 59009aa7e2ca..8f6ab2ac855a 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -1415,21 +1415,19 @@ static int is_directory(const char *base_path, const struct dirent *dent)
return S_ISDIR(st.st_mode);
}
-#define for_each_lang(scripts_path, scripts_dir, lang_dirent, lang_next)\
- while (!readdir_r(scripts_dir, &lang_dirent, &lang_next) && \
- lang_next) \
- if ((lang_dirent.d_type == DT_DIR || \
- (lang_dirent.d_type == DT_UNKNOWN && \
- is_directory(scripts_path, &lang_dirent))) && \
- (strcmp(lang_dirent.d_name, ".")) && \
- (strcmp(lang_dirent.d_name, "..")))
-
-#define for_each_script(lang_path, lang_dir, script_dirent, script_next)\
- while (!readdir_r(lang_dir, &script_dirent, &script_next) && \
- script_next) \
- if (script_dirent.d_type != DT_DIR && \
- (script_dirent.d_type != DT_UNKNOWN || \
- !is_directory(lang_path, &script_dirent)))
+#define for_each_lang(scripts_path, scripts_dir, lang_dirent) \
+ while ((lang_dirent = readdir(scripts_dir)) != NULL) \
+ if ((lang_dirent->d_type == DT_DIR || \
+ (lang_dirent->d_type == DT_UNKNOWN && \
+ is_directory(scripts_path, lang_dirent))) && \
+ (strcmp(lang_dirent->d_name, ".")) && \
+ (strcmp(lang_dirent->d_name, "..")))
+
+#define for_each_script(lang_path, lang_dir, script_dirent) \
+ while ((script_dirent = readdir(lang_dir)) != NULL) \
+ if (script_dirent->d_type != DT_DIR && \
+ (script_dirent->d_type != DT_UNKNOWN || \
+ !is_directory(lang_path, script_dirent)))
#define RECORD_SUFFIX "-record"
@@ -1575,7 +1573,7 @@ static int list_available_scripts(const struct option *opt __maybe_unused,
const char *s __maybe_unused,
int unset __maybe_unused)
{
- struct dirent *script_next, *lang_next, script_dirent, lang_dirent;
+ struct dirent *script_dirent, *lang_dirent;
char scripts_path[MAXPATHLEN];
DIR *scripts_dir, *lang_dir;
char script_path[MAXPATHLEN];
@@ -1590,19 +1588,19 @@ static int list_available_scripts(const struct option *opt __maybe_unused,
if (!scripts_dir)
return -1;
- for_each_lang(scripts_path, scripts_dir, lang_dirent, lang_next) {
+ for_each_lang(scripts_path, scripts_dir, lang_dirent) {
snprintf(lang_path, MAXPATHLEN, "%s/%s/bin", scripts_path,
- lang_dirent.d_name);
+ lang_dirent->d_name);
lang_dir = opendir(lang_path);
if (!lang_dir)
continue;
- for_each_script(lang_path, lang_dir, script_dirent, script_next) {
- script_root = get_script_root(&script_dirent, REPORT_SUFFIX);
+ for_each_script(lang_path, lang_dir, script_dirent) {
+ script_root = get_script_root(script_dirent, REPORT_SUFFIX);
if (script_root) {
desc = script_desc__findnew(script_root);
snprintf(script_path, MAXPATHLEN, "%s/%s",
- lang_path, script_dirent.d_name);
+ lang_path, script_dirent->d_name);
read_script_info(desc, script_path);
free(script_root);
}
@@ -1690,7 +1688,7 @@ static int check_ev_match(char *dir_name, char *scriptname,
*/
int find_scripts(char **scripts_array, char **scripts_path_array)
{
- struct dirent *script_next, *lang_next, script_dirent, lang_dirent;
+ struct dirent *script_dirent, *lang_dirent;
char scripts_path[MAXPATHLEN], lang_path[MAXPATHLEN];
DIR *scripts_dir, *lang_dir;
struct perf_session *session;
@@ -1713,9 +1711,9 @@ int find_scripts(char **scripts_array, char **scripts_path_array)
return -1;
}
- for_each_lang(scripts_path, scripts_dir, lang_dirent, lang_next) {
+ for_each_lang(scripts_path, scripts_dir, lang_dirent) {
snprintf(lang_path, MAXPATHLEN, "%s/%s", scripts_path,
- lang_dirent.d_name);
+ lang_dirent->d_name);
#ifdef NO_LIBPERL
if (strstr(lang_path, "perl"))
continue;
@@ -1729,16 +1727,16 @@ int find_scripts(char **scripts_array, char **scripts_path_array)
if (!lang_dir)
continue;
- for_each_script(lang_path, lang_dir, script_dirent, script_next) {
+ for_each_script(lang_path, lang_dir, script_dirent) {
/* Skip those real time scripts: xxxtop.p[yl] */
- if (strstr(script_dirent.d_name, "top."))
+ if (strstr(script_dirent->d_name, "top."))
continue;
sprintf(scripts_path_array[i], "%s/%s", lang_path,
- script_dirent.d_name);
- temp = strchr(script_dirent.d_name, '.');
+ script_dirent->d_name);
+ temp = strchr(script_dirent->d_name, '.');
snprintf(scripts_array[i],
- (temp - script_dirent.d_name) + 1,
- "%s", script_dirent.d_name);
+ (temp - script_dirent->d_name) + 1,
+ "%s", script_dirent->d_name);
if (check_ev_match(lang_path,
scripts_array[i], session))
@@ -1756,7 +1754,7 @@ int find_scripts(char **scripts_array, char **scripts_path_array)
static char *get_script_path(const char *script_root, const char *suffix)
{
- struct dirent *script_next, *lang_next, script_dirent, lang_dirent;
+ struct dirent *script_dirent, *lang_dirent;
char scripts_path[MAXPATHLEN];
char script_path[MAXPATHLEN];
DIR *scripts_dir, *lang_dir;
@@ -1769,21 +1767,21 @@ static char *get_script_path(const char *script_root, const char *suffix)
if (!scripts_dir)
return NULL;
- for_each_lang(scripts_path, scripts_dir, lang_dirent, lang_next) {
+ for_each_lang(scripts_path, scripts_dir, lang_dirent) {
snprintf(lang_path, MAXPATHLEN, "%s/%s/bin", scripts_path,
- lang_dirent.d_name);
+ lang_dirent->d_name);
lang_dir = opendir(lang_path);
if (!lang_dir)
continue;
- for_each_script(lang_path, lang_dir, script_dirent, script_next) {
- __script_root = get_script_root(&script_dirent, suffix);
+ for_each_script(lang_path, lang_dir, script_dirent) {
+ __script_root = get_script_root(script_dirent, suffix);
if (__script_root && !strcmp(script_root, __script_root)) {
free(__script_root);
closedir(lang_dir);
closedir(scripts_dir);
snprintf(script_path, MAXPATHLEN, "%s/%s",
- lang_path, script_dirent.d_name);
+ lang_path, script_dirent->d_name);
return strdup(script_path);
}
free(__script_root);
--
2.5.5
next prev parent reply other threads:[~2016-04-12 1:59 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-12 1:53 [GIT PULL 00/19] perf/core improvements Arnaldo Carvalho de Melo
2016-04-12 1:53 ` Arnaldo Carvalho de Melo [this message]
2016-04-12 1:53 ` [PATCH 02/19] perf thread_map: Use readdir() instead of deprecated readdir_r() Arnaldo Carvalho de Melo
2016-04-12 1:53 ` [PATCH 03/19] perf tools: " Arnaldo Carvalho de Melo
2016-04-12 1:53 ` [PATCH 04/19] " Arnaldo Carvalho de Melo
2016-04-12 1:53 ` [PATCH 05/19] perf dwarf: Guard !x86_64 definitions under #ifdef else clause Arnaldo Carvalho de Melo
2016-04-12 1:53 ` [PATCH 06/19] perf bpf: Clone bpf stdout events in multiple bpf scripts Arnaldo Carvalho de Melo
2016-04-12 1:53 ` [PATCH 07/19] perf bpf: Automatically create bpf-output event __bpf_stdout__ Arnaldo Carvalho de Melo
2016-04-12 1:53 ` [PATCH 08/19] perf evsel: Allow specifying a file to output in perf_evsel__print_ip Arnaldo Carvalho de Melo
2016-04-12 1:53 ` [PATCH 09/19] perf evsel: Allow passing a left alignment when printing a symbol Arnaldo Carvalho de Melo
2016-04-12 1:53 ` [PATCH 10/19] perf trace: Add support for printing call chains on sys_exit events Arnaldo Carvalho de Melo
2016-04-12 1:53 ` [PATCH 11/19] perf evsel: Rename print_ip() to fprintf_sym() Arnaldo Carvalho de Melo
2016-04-12 1:53 ` [PATCH 12/19] perf evsel: Introduce fprintf_callchain() method out of fprintf_sym() Arnaldo Carvalho de Melo
2016-04-12 1:53 ` [PATCH 13/19] perf trace: Exclude the kernel part of the callchain leading to a syscall Arnaldo Carvalho de Melo
2016-04-12 1:53 ` [PATCH 14/19] perf evsel: Do not use globals in config() Arnaldo Carvalho de Melo
2016-04-12 1:53 ` [PATCH 15/19] perf evlist: Add (reset,set)_sample_bit methods Arnaldo Carvalho de Melo
2016-04-12 1:53 ` [PATCH 16/19] perf evsel: Rename config_callgraph() to config_callchain() and make it public Arnaldo Carvalho de Melo
2016-04-12 1:53 ` [PATCH 17/19] perf trace: Make "--call-graph" affect just "raw_syscalls:sys_exit" Arnaldo Carvalho de Melo
2016-04-12 1:53 ` [PATCH 18/19] perf evsel: Allow unresolved symbol names to be printed as addresses Arnaldo Carvalho de Melo
2016-04-12 1:53 ` [PATCH 19/19] perf trace: Print unresolved symbol names " Arnaldo Carvalho de Melo
2016-04-13 7:03 ` [GIT PULL 00/19] perf/core improvements Ingo Molnar
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