diff options
Diffstat (limited to 'src/tools/perf/util/trace-event-info.c')
| -rw-r--r-- | src/tools/perf/util/trace-event-info.c | 602 |
1 files changed, 0 insertions, 602 deletions
diff --git a/src/tools/perf/util/trace-event-info.c b/src/tools/perf/util/trace-event-info.c deleted file mode 100644 index f3c9e55..0000000 --- a/src/tools/perf/util/trace-event-info.c +++ /dev/null @@ -1,602 +0,0 @@ -/* - * Copyright (C) 2008,2009, Steven Rostedt <srostedt@redhat.com> - * - * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; version 2 of the License (not later!) - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - * - * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ - */ -#include "util.h" -#include <dirent.h> -#include <mntent.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <stdarg.h> -#include <sys/types.h> -#include <sys/stat.h> -#include <sys/wait.h> -#include <pthread.h> -#include <fcntl.h> -#include <unistd.h> -#include <errno.h> -#include <stdbool.h> -#include <linux/list.h> -#include <linux/kernel.h> - -#include "../perf.h" -#include "trace-event.h" -#include <lk/debugfs.h> -#include "evsel.h" - -#define VERSION "0.5" - -static int output_fd; - - -int bigendian(void) -{ - unsigned char str[] = { 0x1, 0x2, 0x3, 0x4, 0x0, 0x0, 0x0, 0x0}; - unsigned int *ptr; - - ptr = (unsigned int *)(void *)str; - return *ptr == 0x01020304; -} - -/* unfortunately, you can not stat debugfs or proc files for size */ -static int record_file(const char *file, ssize_t hdr_sz) -{ - unsigned long long size = 0; - char buf[BUFSIZ], *sizep; - off_t hdr_pos = lseek(output_fd, 0, SEEK_CUR); - int r, fd; - int err = -EIO; - - fd = open(file, O_RDONLY); - if (fd < 0) { - pr_debug("Can't read '%s'", file); - return -errno; - } - - /* put in zeros for file size, then fill true size later */ - if (hdr_sz) { - if (write(output_fd, &size, hdr_sz) != hdr_sz) - goto out; - } - - do { - r = read(fd, buf, BUFSIZ); - if (r > 0) { - size += r; - if (write(output_fd, buf, r) != r) - goto out; - } - } while (r > 0); - - /* ugh, handle big-endian hdr_size == 4 */ - sizep = (char*)&size; - if (bigendian()) - sizep += sizeof(u64) - hdr_sz; - - if (hdr_sz && pwrite(output_fd, sizep, hdr_sz, hdr_pos) < 0) { - pr_debug("writing file size failed\n"); - goto out; - } - - err = 0; -out: - close(fd); - return err; -} - -static int record_header_files(void) -{ - char *path; - struct stat st; - int err = -EIO; - - path = get_tracing_file("events/header_page"); - if (!path) { - pr_debug("can't get tracing/events/header_page"); - return -ENOMEM; - } - - if (stat(path, &st) < 0) { - pr_debug("can't read '%s'", path); - goto out; - } - - if (write(output_fd, "header_page", 12) != 12) { - pr_debug("can't write header_page\n"); - goto out; - } - - if (record_file(path, 8) < 0) { - pr_debug("can't record header_page file\n"); - goto out; - } - - put_tracing_file(path); - - path = get_tracing_file("events/header_event"); - if (!path) { - pr_debug("can't get tracing/events/header_event"); - err = -ENOMEM; - goto out; - } - - if (stat(path, &st) < 0) { - pr_debug("can't read '%s'", path); - goto out; - } - - if (write(output_fd, "header_event", 13) != 13) { - pr_debug("can't write header_event\n"); - goto out; - } - - if (record_file(path, 8) < 0) { - pr_debug("can't record header_event file\n"); - goto out; - } - - err = 0; -out: - put_tracing_file(path); - return err; -} - -static bool name_in_tp_list(char *sys, struct tracepoint_path *tps) -{ - while (tps) { - if (!strcmp(sys, tps->name)) - return true; - tps = tps->next; - } - - return false; -} - -static int copy_event_system(const char *sys, struct tracepoint_path *tps) -{ - struct dirent *dent; - struct stat st; - char *format; - DIR *dir; - int count = 0; - int ret; - int err; - - dir = opendir(sys); - if (!dir) { - pr_debug("can't read directory '%s'", sys); - return -errno; - } - - while ((dent = readdir(dir))) { - 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; - format = malloc(strlen(sys) + strlen(dent->d_name) + 10); - if (!format) { - err = -ENOMEM; - goto out; - } - sprintf(format, "%s/%s/format", sys, dent->d_name); - ret = stat(format, &st); - free(format); - if (ret < 0) - continue; - count++; - } - - if (write(output_fd, &count, 4) != 4) { - err = -EIO; - pr_debug("can't write count\n"); - goto out; - } - - rewinddir(dir); - while ((dent = readdir(dir))) { - 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; - format = malloc(strlen(sys) + strlen(dent->d_name) + 10); - if (!format) { - err = -ENOMEM; - goto out; - } - sprintf(format, "%s/%s/format", sys, dent->d_name); - ret = stat(format, &st); - - if (ret >= 0) { - err = record_file(format, 8); - if (err) { - free(format); - goto out; - } - } - free(format); - } - err = 0; -out: - closedir(dir); - return err; -} - -static int record_ftrace_files(struct tracepoint_path *tps) -{ - char *path; - int ret; - - path = get_tracing_file("events/ftrace"); - if (!path) { - pr_debug("can't get tracing/events/ftrace"); - return -ENOMEM; - } - - ret = copy_event_system(path, tps); - - put_tracing_file(path); - - return ret; -} - -static bool system_in_tp_list(char *sys, struct tracepoint_path *tps) -{ - while (tps) { - if (!strcmp(sys, tps->system)) - return true; - tps = tps->next; - } - - return false; -} - -static int record_event_files(struct tracepoint_path *tps) -{ - struct dirent *dent; - struct stat st; - char *path; - char *sys; - DIR *dir; - int count = 0; - int ret; - int err; - - path = get_tracing_file("events"); - if (!path) { - pr_debug("can't get tracing/events"); - return -ENOMEM; - } - - dir = opendir(path); - if (!dir) { - err = -errno; - pr_debug("can't read directory '%s'", path); - goto out; - } - - while ((dent = readdir(dir))) { - 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; - count++; - } - - if (write(output_fd, &count, 4) != 4) { - err = -EIO; - pr_debug("can't write count\n"); - goto out; - } - - rewinddir(dir); - while ((dent = readdir(dir))) { - 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(strlen(path) + strlen(dent->d_name) + 2); - if (!sys) { - err = -ENOMEM; - goto out; - } - sprintf(sys, "%s/%s", path, dent->d_name); - ret = stat(sys, &st); - if (ret >= 0) { - ssize_t size = strlen(dent->d_name) + 1; - - if (write(output_fd, dent->d_name, size) != size || - copy_event_system(sys, tps) < 0) { - err = -EIO; - free(sys); - goto out; - } - } - free(sys); - } - err = 0; -out: - closedir(dir); - put_tracing_file(path); - - return err; -} - -static int record_proc_kallsyms(void) -{ - unsigned int size; - const char *path = "/proc/kallsyms"; - struct stat st; - int ret, err = 0; - - ret = stat(path, &st); - if (ret < 0) { - /* not found */ - size = 0; - if (write(output_fd, &size, 4) != 4) - err = -EIO; - return err; - } - return record_file(path, 4); -} - -static int record_ftrace_printk(void) -{ - unsigned int size; - char *path; - struct stat st; - int ret, err = 0; - - path = get_tracing_file("printk_formats"); - if (!path) { - pr_debug("can't get tracing/printk_formats"); - return -ENOMEM; - } - - ret = stat(path, &st); - if (ret < 0) { - /* not found */ - size = 0; - if (write(output_fd, &size, 4) != 4) - err = -EIO; - goto out; - } - err = record_file(path, 4); - -out: - put_tracing_file(path); - return err; -} - -static void -put_tracepoints_path(struct tracepoint_path *tps) -{ - while (tps) { - struct tracepoint_path *t = tps; - - tps = tps->next; - free(t->name); - free(t->system); - free(t); - } -} - -static struct tracepoint_path * -get_tracepoints_path(struct list_head *pattrs) -{ - struct tracepoint_path path, *ppath = &path; - struct perf_evsel *pos; - int nr_tracepoints = 0; - - list_for_each_entry(pos, pattrs, node) { - if (pos->attr.type != PERF_TYPE_TRACEPOINT) - continue; - ++nr_tracepoints; - - if (pos->name) { - ppath->next = tracepoint_name_to_path(pos->name); - if (ppath->next) - goto next; - - if (strchr(pos->name, ':') == NULL) - goto try_id; - - goto error; - } - -try_id: - ppath->next = tracepoint_id_to_path(pos->attr.config); - if (!ppath->next) { -error: - pr_debug("No memory to alloc tracepoints list\n"); - put_tracepoints_path(&path); - return NULL; - } -next: - ppath = ppath->next; - } - - return nr_tracepoints > 0 ? path.next : NULL; -} - -bool have_tracepoints(struct list_head *pattrs) -{ - struct perf_evsel *pos; - - list_for_each_entry(pos, pattrs, node) - if (pos->attr.type == PERF_TYPE_TRACEPOINT) - return true; - - return false; -} - -static int tracing_data_header(void) -{ - char buf[20]; - ssize_t size; - - /* just guessing this is someone's birthday.. ;) */ - buf[0] = 23; - buf[1] = 8; - buf[2] = 68; - memcpy(buf + 3, "tracing", 7); - - if (write(output_fd, buf, 10) != 10) - return -1; - - size = strlen(VERSION) + 1; - if (write(output_fd, VERSION, size) != size) - return -1; - - /* save endian */ - if (bigendian()) - buf[0] = 1; - else - buf[0] = 0; - - if (write(output_fd, buf, 1) != 1) - return -1; - - /* save size of long */ - buf[0] = sizeof(long); - if (write(output_fd, buf, 1) != 1) - return -1; - - /* save page_size */ - if (write(output_fd, &page_size, 4) != 4) - return -1; - - return 0; -} - -struct tracing_data *tracing_data_get(struct list_head *pattrs, - int fd, bool temp) -{ - struct tracepoint_path *tps; - struct tracing_data *tdata; - int err; - - output_fd = fd; - - tps = get_tracepoints_path(pattrs); - if (!tps) - return NULL; - - tdata = malloc(sizeof(*tdata)); - if (!tdata) - return NULL; - - tdata->temp = temp; - tdata->size = 0; - - if (temp) { - int temp_fd; - - snprintf(tdata->temp_file, sizeof(tdata->temp_file), - "/tmp/perf-XXXXXX"); - if (!mkstemp(tdata->temp_file)) { - pr_debug("Can't make temp file"); - return NULL; - } - - temp_fd = open(tdata->temp_file, O_RDWR); - if (temp_fd < 0) { - pr_debug("Can't read '%s'", tdata->temp_file); - return NULL; - } - - /* - * Set the temp file the default output, so all the - * tracing data are stored into it. - */ - output_fd = temp_fd; - } - - err = tracing_data_header(); - if (err) - goto out; - err = record_header_files(); - if (err) - goto out; - err = record_ftrace_files(tps); - if (err) - goto out; - err = record_event_files(tps); - if (err) - goto out; - err = record_proc_kallsyms(); - if (err) - goto out; - err = record_ftrace_printk(); - -out: - /* - * All tracing data are stored by now, we can restore - * the default output file in case we used temp file. - */ - if (temp) { - tdata->size = lseek(output_fd, 0, SEEK_CUR); - close(output_fd); - output_fd = fd; - } - - if (err) { - free(tdata); - tdata = NULL; - } - - put_tracepoints_path(tps); - return tdata; -} - -int tracing_data_put(struct tracing_data *tdata) -{ - int err = 0; - - if (tdata->temp) { - err = record_file(tdata->temp_file, 0); - unlink(tdata->temp_file); - } - - free(tdata); - return err; -} - -int read_tracing_data(int fd, struct list_head *pattrs) -{ - int err; - struct tracing_data *tdata; - - /* - * We work over the real file, so we can write data - * directly, no temp file is needed. - */ - tdata = tracing_data_get(pattrs, fd, false); - if (!tdata) - return -ENOMEM; - - err = tracing_data_put(tdata); - return err; -} |