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Diffstat (limited to 'tools/perf/util/trace-event-info.c')
-rw-r--r--tools/perf/util/trace-event-info.c64
1 files changed, 23 insertions, 41 deletions
diff --git a/tools/perf/util/trace-event-info.c b/tools/perf/util/trace-event-info.c
index cace3559553..5ea8973ad33 100644
--- a/tools/perf/util/trace-event-info.c
+++ b/tools/perf/util/trace-event-info.c
@@ -20,6 +20,7 @@
*/
#define _GNU_SOURCE
#include <dirent.h>
+#include <mntent.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
@@ -37,6 +38,7 @@
#include "../perf.h"
#include "trace-event.h"
+#include "debugfs.h"
#define VERSION "0.5"
@@ -101,32 +103,12 @@ void *malloc_or_die(unsigned int size)
static const char *find_debugfs(void)
{
- static char debugfs[MAX_PATH+1];
- static int debugfs_found;
- char type[100];
- FILE *fp;
-
- if (debugfs_found)
- return debugfs;
-
- if ((fp = fopen("/proc/mounts","r")) == NULL)
- die("Can't open /proc/mounts for read");
-
- while (fscanf(fp, "%*s %"
- STR(MAX_PATH)
- "s %99s %*s %*d %*d\n",
- debugfs, type) == 2) {
- if (strcmp(type, "debugfs") == 0)
- break;
- }
- fclose(fp);
-
- if (strcmp(type, "debugfs") != 0)
- die("debugfs not mounted, please mount");
+ const char *path = debugfs_mount(NULL);
- debugfs_found = 1;
+ if (!path)
+ die("Your kernel not support debugfs filesystem");
- return debugfs;
+ return path;
}
/*
@@ -271,6 +253,8 @@ static void read_header_files(void)
write_or_die("header_page", 12);
write_or_die(&size, 8);
check_size = copy_file_fd(fd);
+ close(fd);
+
if (size != check_size)
die("wrong size for '%s' size=%lld read=%lld",
path, size, check_size);
@@ -289,6 +273,7 @@ static void read_header_files(void)
if (size != check_size)
die("wrong size for '%s'", path);
put_tracing_file(path);
+ close(fd);
}
static bool name_in_tp_list(char *sys, struct tracepoint_path *tps)
@@ -317,7 +302,8 @@ static void copy_event_system(const char *sys, struct tracepoint_path *tps)
die("can't read directory '%s'", sys);
while ((dent = readdir(dir))) {
- if (strcmp(dent->d_name, ".") == 0 ||
+ if (dent->d_type != DT_DIR ||
+ strcmp(dent->d_name, ".") == 0 ||
strcmp(dent->d_name, "..") == 0 ||
!name_in_tp_list(dent->d_name, tps))
continue;
@@ -334,7 +320,8 @@ static void copy_event_system(const char *sys, struct tracepoint_path *tps)
rewinddir(dir);
while ((dent = readdir(dir))) {
- if (strcmp(dent->d_name, ".") == 0 ||
+ if (dent->d_type != DT_DIR ||
+ strcmp(dent->d_name, ".") == 0 ||
strcmp(dent->d_name, "..") == 0 ||
!name_in_tp_list(dent->d_name, tps))
continue;
@@ -353,6 +340,7 @@ static void copy_event_system(const char *sys, struct tracepoint_path *tps)
free(format);
}
+ closedir(dir);
}
static void read_ftrace_files(struct tracepoint_path *tps)
@@ -394,26 +382,21 @@ static void read_event_files(struct tracepoint_path *tps)
die("can't read directory '%s'", path);
while ((dent = readdir(dir))) {
- if (strcmp(dent->d_name, ".") == 0 ||
+ if (dent->d_type != DT_DIR ||
+ strcmp(dent->d_name, ".") == 0 ||
strcmp(dent->d_name, "..") == 0 ||
strcmp(dent->d_name, "ftrace") == 0 ||
!system_in_tp_list(dent->d_name, tps))
continue;
- sys = malloc_or_die(strlen(path) + strlen(dent->d_name) + 2);
- sprintf(sys, "%s/%s", path, dent->d_name);
- ret = stat(sys, &st);
- free(sys);
- if (ret < 0)
- continue;
- if (S_ISDIR(st.st_mode))
- count++;
+ count++;
}
write_or_die(&count, 4);
rewinddir(dir);
while ((dent = readdir(dir))) {
- if (strcmp(dent->d_name, ".") == 0 ||
+ if (dent->d_type != DT_DIR ||
+ strcmp(dent->d_name, ".") == 0 ||
strcmp(dent->d_name, "..") == 0 ||
strcmp(dent->d_name, "ftrace") == 0 ||
!system_in_tp_list(dent->d_name, tps))
@@ -422,14 +405,13 @@ static void read_event_files(struct tracepoint_path *tps)
sprintf(sys, "%s/%s", path, dent->d_name);
ret = stat(sys, &st);
if (ret >= 0) {
- if (S_ISDIR(st.st_mode)) {
- write_or_die(dent->d_name, strlen(dent->d_name) + 1);
- copy_event_system(sys, tps);
- }
+ write_or_die(dent->d_name, strlen(dent->d_name) + 1);
+ copy_event_system(sys, tps);
}
free(sys);
}
+ closedir(dir);
put_tracing_file(path);
}
@@ -533,7 +515,7 @@ int read_tracing_data(int fd, struct perf_event_attr *pattrs, int nb_events)
write_or_die(buf, 1);
/* save page_size */
- page_size = getpagesize();
+ page_size = sysconf(_SC_PAGESIZE);
write_or_die(&page_size, 4);
read_header_files();