From 725b13685c61168f71825b3fb67d96d2d7aa3b0f Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Thu, 24 Sep 2009 15:39:09 +0200 Subject: [PATCH] perf tools: Dont use openat() openat() is still a young glibc facility, better to not use it in a non performance critical program (perf list) Many machines have older glibc (RHEL 4 Update 5 -> glibc-2.3.4-2.36 on my dev machine for example). Signed-off-by: Eric Dumazet Cc: Peter Zijlstra Cc: Ulrich Drepper LKML-Reference: <4ABB767D.6080004@gmail.com> Signed-off-by: Ingo Molnar --- tools/perf/util/parse-events.c | 49 ++++++++++++++-------------------- 1 file changed, 20 insertions(+), 29 deletions(-) diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c index 13ab4b842d49..87c424de79ee 100644 --- a/tools/perf/util/parse-events.c +++ b/tools/perf/util/parse-events.c @@ -165,33 +165,31 @@ struct tracepoint_path *tracepoint_id_to_path(u64 config) DIR *sys_dir, *evt_dir; struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent; char id_buf[4]; - int sys_dir_fd, fd; + int fd; u64 id; char evt_path[MAXPATHLEN]; + char dir_path[MAXPATHLEN]; if (valid_debugfs_mount(debugfs_path)) return NULL; sys_dir = opendir(debugfs_path); if (!sys_dir) - goto cleanup; - sys_dir_fd = dirfd(sys_dir); + return NULL; for_each_subsystem(sys_dir, sys_dirent, sys_next) { - int dfd = openat(sys_dir_fd, sys_dirent.d_name, - O_RDONLY|O_DIRECTORY), evt_dir_fd; - if (dfd == -1) - continue; - evt_dir = fdopendir(dfd); - if (!evt_dir) { - close(dfd); + + snprintf(dir_path, MAXPATHLEN, "%s/%s", debugfs_path, + sys_dirent.d_name); + evt_dir = opendir(dir_path); + if (!evt_dir) continue; - } - evt_dir_fd = dirfd(evt_dir); + for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) { - snprintf(evt_path, MAXPATHLEN, "%s/id", + + snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path, evt_dirent.d_name); - fd = openat(evt_dir_fd, evt_path, O_RDONLY); + fd = open(evt_path, O_RDONLY); if (fd < 0) continue; if (read(fd, id_buf, sizeof(id_buf)) < 0) { @@ -225,7 +223,6 @@ struct tracepoint_path *tracepoint_id_to_path(u64 config) closedir(evt_dir); } -cleanup: closedir(sys_dir); return NULL; } @@ -761,28 +758,24 @@ static void print_tracepoint_events(void) { DIR *sys_dir, *evt_dir; struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent; - int sys_dir_fd; char evt_path[MAXPATHLEN]; + char dir_path[MAXPATHLEN]; if (valid_debugfs_mount(debugfs_path)) return; sys_dir = opendir(debugfs_path); if (!sys_dir) - goto cleanup; - sys_dir_fd = dirfd(sys_dir); + return; for_each_subsystem(sys_dir, sys_dirent, sys_next) { - int dfd = openat(sys_dir_fd, sys_dirent.d_name, - O_RDONLY|O_DIRECTORY), evt_dir_fd; - if (dfd == -1) - continue; - evt_dir = fdopendir(dfd); - if (!evt_dir) { - close(dfd); + + snprintf(dir_path, MAXPATHLEN, "%s/%s", debugfs_path, + sys_dirent.d_name); + evt_dir = opendir(dir_path); + if (!evt_dir) continue; - } - evt_dir_fd = dirfd(evt_dir); + for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) { snprintf(evt_path, MAXPATHLEN, "%s:%s", sys_dirent.d_name, evt_dirent.d_name); @@ -791,8 +784,6 @@ static void print_tracepoint_events(void) } closedir(evt_dir); } - -cleanup: closedir(sys_dir); } -- 2.20.1