936 lines
20 KiB
C
936 lines
20 KiB
C
/*
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* probe-file.c : operate ftrace k/uprobe events files
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*
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* Written by Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <sys/uio.h>
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#include "util.h"
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#include "event.h"
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#include "strlist.h"
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#include "debug.h"
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#include "cache.h"
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#include "color.h"
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#include "symbol.h"
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#include "thread.h"
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#include <api/fs/tracing_path.h>
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#include "probe-event.h"
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#include "probe-file.h"
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#include "session.h"
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#define MAX_CMDLEN 256
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static void print_open_warning(int err, bool uprobe)
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{
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char sbuf[STRERR_BUFSIZE];
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if (err == -ENOENT) {
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const char *config;
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if (uprobe)
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config = "CONFIG_UPROBE_EVENTS";
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else
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config = "CONFIG_KPROBE_EVENTS";
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pr_warning("%cprobe_events file does not exist"
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" - please rebuild kernel with %s.\n",
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uprobe ? 'u' : 'k', config);
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} else if (err == -ENOTSUP)
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pr_warning("Tracefs or debugfs is not mounted.\n");
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else
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pr_warning("Failed to open %cprobe_events: %s\n",
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uprobe ? 'u' : 'k',
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str_error_r(-err, sbuf, sizeof(sbuf)));
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}
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static void print_both_open_warning(int kerr, int uerr)
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{
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/* Both kprobes and uprobes are disabled, warn it. */
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if (kerr == -ENOTSUP && uerr == -ENOTSUP)
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pr_warning("Tracefs or debugfs is not mounted.\n");
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else if (kerr == -ENOENT && uerr == -ENOENT)
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pr_warning("Please rebuild kernel with CONFIG_KPROBE_EVENTS "
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"or/and CONFIG_UPROBE_EVENTS.\n");
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else {
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char sbuf[STRERR_BUFSIZE];
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pr_warning("Failed to open kprobe events: %s.\n",
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str_error_r(-kerr, sbuf, sizeof(sbuf)));
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pr_warning("Failed to open uprobe events: %s.\n",
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str_error_r(-uerr, sbuf, sizeof(sbuf)));
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}
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}
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static int open_probe_events(const char *trace_file, bool readwrite)
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{
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char buf[PATH_MAX];
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int ret;
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ret = e_snprintf(buf, PATH_MAX, "%s/%s",
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tracing_path, trace_file);
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if (ret >= 0) {
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pr_debug("Opening %s write=%d\n", buf, readwrite);
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if (readwrite && !probe_event_dry_run)
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ret = open(buf, O_RDWR | O_APPEND, 0);
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else
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ret = open(buf, O_RDONLY, 0);
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if (ret < 0)
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ret = -errno;
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}
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return ret;
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}
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static int open_kprobe_events(bool readwrite)
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{
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return open_probe_events("kprobe_events", readwrite);
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}
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static int open_uprobe_events(bool readwrite)
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{
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return open_probe_events("uprobe_events", readwrite);
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}
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int probe_file__open(int flag)
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{
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int fd;
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if (flag & PF_FL_UPROBE)
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fd = open_uprobe_events(flag & PF_FL_RW);
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else
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fd = open_kprobe_events(flag & PF_FL_RW);
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if (fd < 0)
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print_open_warning(fd, flag & PF_FL_UPROBE);
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return fd;
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}
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int probe_file__open_both(int *kfd, int *ufd, int flag)
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{
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if (!kfd || !ufd)
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return -EINVAL;
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*kfd = open_kprobe_events(flag & PF_FL_RW);
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*ufd = open_uprobe_events(flag & PF_FL_RW);
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if (*kfd < 0 && *ufd < 0) {
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print_both_open_warning(*kfd, *ufd);
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return *kfd;
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}
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return 0;
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}
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/* Get raw string list of current kprobe_events or uprobe_events */
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struct strlist *probe_file__get_rawlist(int fd)
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{
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int ret, idx, fddup;
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FILE *fp;
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char buf[MAX_CMDLEN];
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char *p;
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struct strlist *sl;
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if (fd < 0)
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return NULL;
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sl = strlist__new(NULL, NULL);
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if (sl == NULL)
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return NULL;
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fddup = dup(fd);
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if (fddup < 0)
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goto out_free_sl;
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fp = fdopen(fddup, "r");
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if (!fp)
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goto out_close_fddup;
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while (!feof(fp)) {
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p = fgets(buf, MAX_CMDLEN, fp);
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if (!p)
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break;
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idx = strlen(p) - 1;
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if (p[idx] == '\n')
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p[idx] = '\0';
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ret = strlist__add(sl, buf);
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if (ret < 0) {
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pr_debug("strlist__add failed (%d)\n", ret);
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goto out_close_fp;
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}
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}
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fclose(fp);
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return sl;
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out_close_fp:
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fclose(fp);
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goto out_free_sl;
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out_close_fddup:
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close(fddup);
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out_free_sl:
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strlist__delete(sl);
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return NULL;
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}
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static struct strlist *__probe_file__get_namelist(int fd, bool include_group)
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{
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char buf[128];
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struct strlist *sl, *rawlist;
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struct str_node *ent;
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struct probe_trace_event tev;
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int ret = 0;
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memset(&tev, 0, sizeof(tev));
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rawlist = probe_file__get_rawlist(fd);
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if (!rawlist)
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return NULL;
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sl = strlist__new(NULL, NULL);
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strlist__for_each_entry(ent, rawlist) {
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ret = parse_probe_trace_command(ent->s, &tev);
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if (ret < 0)
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break;
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if (include_group) {
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ret = e_snprintf(buf, 128, "%s:%s", tev.group,
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tev.event);
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if (ret >= 0)
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ret = strlist__add(sl, buf);
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} else
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ret = strlist__add(sl, tev.event);
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clear_probe_trace_event(&tev);
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if (ret < 0)
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break;
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}
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strlist__delete(rawlist);
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if (ret < 0) {
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strlist__delete(sl);
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return NULL;
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}
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return sl;
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}
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/* Get current perf-probe event names */
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struct strlist *probe_file__get_namelist(int fd)
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{
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return __probe_file__get_namelist(fd, false);
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}
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int probe_file__add_event(int fd, struct probe_trace_event *tev)
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{
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int ret = 0;
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char *buf = synthesize_probe_trace_command(tev);
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char sbuf[STRERR_BUFSIZE];
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if (!buf) {
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pr_debug("Failed to synthesize probe trace event.\n");
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return -EINVAL;
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}
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pr_debug("Writing event: %s\n", buf);
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if (!probe_event_dry_run) {
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if (write(fd, buf, strlen(buf)) < (int)strlen(buf)) {
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ret = -errno;
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pr_warning("Failed to write event: %s\n",
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str_error_r(errno, sbuf, sizeof(sbuf)));
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}
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}
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free(buf);
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return ret;
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}
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static int __del_trace_probe_event(int fd, struct str_node *ent)
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{
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char *p;
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char buf[128];
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int ret;
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/* Convert from perf-probe event to trace-probe event */
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ret = e_snprintf(buf, 128, "-:%s", ent->s);
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if (ret < 0)
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goto error;
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p = strchr(buf + 2, ':');
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if (!p) {
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pr_debug("Internal error: %s should have ':' but not.\n",
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ent->s);
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ret = -ENOTSUP;
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goto error;
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}
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*p = '/';
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pr_debug("Writing event: %s\n", buf);
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ret = write(fd, buf, strlen(buf));
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if (ret < 0) {
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ret = -errno;
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goto error;
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}
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return 0;
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error:
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pr_warning("Failed to delete event: %s\n",
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str_error_r(-ret, buf, sizeof(buf)));
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return ret;
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}
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int probe_file__get_events(int fd, struct strfilter *filter,
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struct strlist *plist)
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{
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struct strlist *namelist;
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struct str_node *ent;
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const char *p;
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int ret = -ENOENT;
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if (!plist)
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return -EINVAL;
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namelist = __probe_file__get_namelist(fd, true);
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if (!namelist)
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return -ENOENT;
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strlist__for_each_entry(ent, namelist) {
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p = strchr(ent->s, ':');
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if ((p && strfilter__compare(filter, p + 1)) ||
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strfilter__compare(filter, ent->s)) {
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strlist__add(plist, ent->s);
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ret = 0;
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}
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}
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strlist__delete(namelist);
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return ret;
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}
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int probe_file__del_strlist(int fd, struct strlist *namelist)
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{
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int ret = 0;
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struct str_node *ent;
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strlist__for_each_entry(ent, namelist) {
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ret = __del_trace_probe_event(fd, ent);
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if (ret < 0)
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break;
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}
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return ret;
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}
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int probe_file__del_events(int fd, struct strfilter *filter)
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{
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struct strlist *namelist;
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int ret;
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namelist = strlist__new(NULL, NULL);
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if (!namelist)
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return -ENOMEM;
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|
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ret = probe_file__get_events(fd, filter, namelist);
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if (ret < 0)
|
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return ret;
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|
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ret = probe_file__del_strlist(fd, namelist);
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strlist__delete(namelist);
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|
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return ret;
|
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}
|
|
|
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/* Caller must ensure to remove this entry from list */
|
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static void probe_cache_entry__delete(struct probe_cache_entry *entry)
|
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{
|
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if (entry) {
|
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BUG_ON(!list_empty(&entry->node));
|
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|
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strlist__delete(entry->tevlist);
|
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clear_perf_probe_event(&entry->pev);
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zfree(&entry->spev);
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free(entry);
|
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}
|
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}
|
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|
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static struct probe_cache_entry *
|
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probe_cache_entry__new(struct perf_probe_event *pev)
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{
|
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struct probe_cache_entry *entry = zalloc(sizeof(*entry));
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|
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if (entry) {
|
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INIT_LIST_HEAD(&entry->node);
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entry->tevlist = strlist__new(NULL, NULL);
|
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if (!entry->tevlist)
|
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zfree(&entry);
|
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else if (pev) {
|
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entry->spev = synthesize_perf_probe_command(pev);
|
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if (!entry->spev ||
|
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perf_probe_event__copy(&entry->pev, pev) < 0) {
|
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probe_cache_entry__delete(entry);
|
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return NULL;
|
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}
|
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}
|
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}
|
|
|
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return entry;
|
|
}
|
|
|
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int probe_cache_entry__get_event(struct probe_cache_entry *entry,
|
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struct probe_trace_event **tevs)
|
|
{
|
|
struct probe_trace_event *tev;
|
|
struct str_node *node;
|
|
int ret, i;
|
|
|
|
ret = strlist__nr_entries(entry->tevlist);
|
|
if (ret > probe_conf.max_probes)
|
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return -E2BIG;
|
|
|
|
*tevs = zalloc(ret * sizeof(*tev));
|
|
if (!*tevs)
|
|
return -ENOMEM;
|
|
|
|
i = 0;
|
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strlist__for_each_entry(node, entry->tevlist) {
|
|
tev = &(*tevs)[i++];
|
|
ret = parse_probe_trace_command(node->s, tev);
|
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if (ret < 0)
|
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break;
|
|
}
|
|
return i;
|
|
}
|
|
|
|
/* For the kernel probe caches, pass target = NULL or DSO__NAME_KALLSYMS */
|
|
static int probe_cache__open(struct probe_cache *pcache, const char *target)
|
|
{
|
|
char cpath[PATH_MAX];
|
|
char sbuildid[SBUILD_ID_SIZE];
|
|
char *dir_name = NULL;
|
|
bool is_kallsyms = false;
|
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int ret, fd;
|
|
|
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if (target && build_id_cache__cached(target)) {
|
|
/* This is a cached buildid */
|
|
strncpy(sbuildid, target, SBUILD_ID_SIZE);
|
|
dir_name = build_id_cache__linkname(sbuildid, NULL, 0);
|
|
goto found;
|
|
}
|
|
|
|
if (!target || !strcmp(target, DSO__NAME_KALLSYMS)) {
|
|
target = DSO__NAME_KALLSYMS;
|
|
is_kallsyms = true;
|
|
ret = sysfs__sprintf_build_id("/", sbuildid);
|
|
} else
|
|
ret = filename__sprintf_build_id(target, sbuildid);
|
|
|
|
if (ret < 0) {
|
|
pr_debug("Failed to get build-id from %s.\n", target);
|
|
return ret;
|
|
}
|
|
|
|
/* If we have no buildid cache, make it */
|
|
if (!build_id_cache__cached(sbuildid)) {
|
|
ret = build_id_cache__add_s(sbuildid, target,
|
|
is_kallsyms, NULL);
|
|
if (ret < 0) {
|
|
pr_debug("Failed to add build-id cache: %s\n", target);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
dir_name = build_id_cache__cachedir(sbuildid, target, is_kallsyms,
|
|
false);
|
|
found:
|
|
if (!dir_name) {
|
|
pr_debug("Failed to get cache from %s\n", target);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
snprintf(cpath, PATH_MAX, "%s/probes", dir_name);
|
|
fd = open(cpath, O_CREAT | O_RDWR, 0644);
|
|
if (fd < 0)
|
|
pr_debug("Failed to open cache(%d): %s\n", fd, cpath);
|
|
free(dir_name);
|
|
pcache->fd = fd;
|
|
|
|
return fd;
|
|
}
|
|
|
|
static int probe_cache__load(struct probe_cache *pcache)
|
|
{
|
|
struct probe_cache_entry *entry = NULL;
|
|
char buf[MAX_CMDLEN], *p;
|
|
int ret = 0, fddup;
|
|
FILE *fp;
|
|
|
|
fddup = dup(pcache->fd);
|
|
if (fddup < 0)
|
|
return -errno;
|
|
fp = fdopen(fddup, "r");
|
|
if (!fp) {
|
|
close(fddup);
|
|
return -EINVAL;
|
|
}
|
|
|
|
while (!feof(fp)) {
|
|
if (!fgets(buf, MAX_CMDLEN, fp))
|
|
break;
|
|
p = strchr(buf, '\n');
|
|
if (p)
|
|
*p = '\0';
|
|
/* #perf_probe_event or %sdt_event */
|
|
if (buf[0] == '#' || buf[0] == '%') {
|
|
entry = probe_cache_entry__new(NULL);
|
|
if (!entry) {
|
|
ret = -ENOMEM;
|
|
goto out;
|
|
}
|
|
if (buf[0] == '%')
|
|
entry->sdt = true;
|
|
entry->spev = strdup(buf + 1);
|
|
if (entry->spev)
|
|
ret = parse_perf_probe_command(buf + 1,
|
|
&entry->pev);
|
|
else
|
|
ret = -ENOMEM;
|
|
if (ret < 0) {
|
|
probe_cache_entry__delete(entry);
|
|
goto out;
|
|
}
|
|
list_add_tail(&entry->node, &pcache->entries);
|
|
} else { /* trace_probe_event */
|
|
if (!entry) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
strlist__add(entry->tevlist, buf);
|
|
}
|
|
}
|
|
out:
|
|
fclose(fp);
|
|
return ret;
|
|
}
|
|
|
|
static struct probe_cache *probe_cache__alloc(void)
|
|
{
|
|
struct probe_cache *pcache = zalloc(sizeof(*pcache));
|
|
|
|
if (pcache) {
|
|
INIT_LIST_HEAD(&pcache->entries);
|
|
pcache->fd = -EINVAL;
|
|
}
|
|
return pcache;
|
|
}
|
|
|
|
void probe_cache__purge(struct probe_cache *pcache)
|
|
{
|
|
struct probe_cache_entry *entry, *n;
|
|
|
|
list_for_each_entry_safe(entry, n, &pcache->entries, node) {
|
|
list_del_init(&entry->node);
|
|
probe_cache_entry__delete(entry);
|
|
}
|
|
}
|
|
|
|
void probe_cache__delete(struct probe_cache *pcache)
|
|
{
|
|
if (!pcache)
|
|
return;
|
|
|
|
probe_cache__purge(pcache);
|
|
if (pcache->fd > 0)
|
|
close(pcache->fd);
|
|
free(pcache);
|
|
}
|
|
|
|
struct probe_cache *probe_cache__new(const char *target)
|
|
{
|
|
struct probe_cache *pcache = probe_cache__alloc();
|
|
int ret;
|
|
|
|
if (!pcache)
|
|
return NULL;
|
|
|
|
ret = probe_cache__open(pcache, target);
|
|
if (ret < 0) {
|
|
pr_debug("Cache open error: %d\n", ret);
|
|
goto out_err;
|
|
}
|
|
|
|
ret = probe_cache__load(pcache);
|
|
if (ret < 0) {
|
|
pr_debug("Cache read error: %d\n", ret);
|
|
goto out_err;
|
|
}
|
|
|
|
return pcache;
|
|
|
|
out_err:
|
|
probe_cache__delete(pcache);
|
|
return NULL;
|
|
}
|
|
|
|
static bool streql(const char *a, const char *b)
|
|
{
|
|
if (a == b)
|
|
return true;
|
|
|
|
if (!a || !b)
|
|
return false;
|
|
|
|
return !strcmp(a, b);
|
|
}
|
|
|
|
struct probe_cache_entry *
|
|
probe_cache__find(struct probe_cache *pcache, struct perf_probe_event *pev)
|
|
{
|
|
struct probe_cache_entry *entry = NULL;
|
|
char *cmd = synthesize_perf_probe_command(pev);
|
|
|
|
if (!cmd)
|
|
return NULL;
|
|
|
|
for_each_probe_cache_entry(entry, pcache) {
|
|
if (pev->sdt) {
|
|
if (entry->pev.event &&
|
|
streql(entry->pev.event, pev->event) &&
|
|
(!pev->group ||
|
|
streql(entry->pev.group, pev->group)))
|
|
goto found;
|
|
|
|
continue;
|
|
}
|
|
/* Hit if same event name or same command-string */
|
|
if ((pev->event &&
|
|
(streql(entry->pev.group, pev->group) &&
|
|
streql(entry->pev.event, pev->event))) ||
|
|
(!strcmp(entry->spev, cmd)))
|
|
goto found;
|
|
}
|
|
entry = NULL;
|
|
|
|
found:
|
|
free(cmd);
|
|
return entry;
|
|
}
|
|
|
|
struct probe_cache_entry *
|
|
probe_cache__find_by_name(struct probe_cache *pcache,
|
|
const char *group, const char *event)
|
|
{
|
|
struct probe_cache_entry *entry = NULL;
|
|
|
|
for_each_probe_cache_entry(entry, pcache) {
|
|
/* Hit if same event name or same command-string */
|
|
if (streql(entry->pev.group, group) &&
|
|
streql(entry->pev.event, event))
|
|
goto found;
|
|
}
|
|
entry = NULL;
|
|
|
|
found:
|
|
return entry;
|
|
}
|
|
|
|
int probe_cache__add_entry(struct probe_cache *pcache,
|
|
struct perf_probe_event *pev,
|
|
struct probe_trace_event *tevs, int ntevs)
|
|
{
|
|
struct probe_cache_entry *entry = NULL;
|
|
char *command;
|
|
int i, ret = 0;
|
|
|
|
if (!pcache || !pev || !tevs || ntevs <= 0) {
|
|
ret = -EINVAL;
|
|
goto out_err;
|
|
}
|
|
|
|
/* Remove old cache entry */
|
|
entry = probe_cache__find(pcache, pev);
|
|
if (entry) {
|
|
list_del_init(&entry->node);
|
|
probe_cache_entry__delete(entry);
|
|
}
|
|
|
|
ret = -ENOMEM;
|
|
entry = probe_cache_entry__new(pev);
|
|
if (!entry)
|
|
goto out_err;
|
|
|
|
for (i = 0; i < ntevs; i++) {
|
|
if (!tevs[i].point.symbol)
|
|
continue;
|
|
|
|
command = synthesize_probe_trace_command(&tevs[i]);
|
|
if (!command)
|
|
goto out_err;
|
|
strlist__add(entry->tevlist, command);
|
|
free(command);
|
|
}
|
|
list_add_tail(&entry->node, &pcache->entries);
|
|
pr_debug("Added probe cache: %d\n", ntevs);
|
|
return 0;
|
|
|
|
out_err:
|
|
pr_debug("Failed to add probe caches\n");
|
|
probe_cache_entry__delete(entry);
|
|
return ret;
|
|
}
|
|
|
|
#ifdef HAVE_GELF_GETNOTE_SUPPORT
|
|
static unsigned long long sdt_note__get_addr(struct sdt_note *note)
|
|
{
|
|
return note->bit32 ? (unsigned long long)note->addr.a32[0]
|
|
: (unsigned long long)note->addr.a64[0];
|
|
}
|
|
|
|
int probe_cache__scan_sdt(struct probe_cache *pcache, const char *pathname)
|
|
{
|
|
struct probe_cache_entry *entry = NULL;
|
|
struct list_head sdtlist;
|
|
struct sdt_note *note;
|
|
char *buf;
|
|
char sdtgrp[64];
|
|
int ret;
|
|
|
|
INIT_LIST_HEAD(&sdtlist);
|
|
ret = get_sdt_note_list(&sdtlist, pathname);
|
|
if (ret < 0) {
|
|
pr_debug4("Failed to get sdt note: %d\n", ret);
|
|
return ret;
|
|
}
|
|
list_for_each_entry(note, &sdtlist, note_list) {
|
|
ret = snprintf(sdtgrp, 64, "sdt_%s", note->provider);
|
|
if (ret < 0)
|
|
break;
|
|
/* Try to find same-name entry */
|
|
entry = probe_cache__find_by_name(pcache, sdtgrp, note->name);
|
|
if (!entry) {
|
|
entry = probe_cache_entry__new(NULL);
|
|
if (!entry) {
|
|
ret = -ENOMEM;
|
|
break;
|
|
}
|
|
entry->sdt = true;
|
|
ret = asprintf(&entry->spev, "%s:%s=%s", sdtgrp,
|
|
note->name, note->name);
|
|
if (ret < 0)
|
|
break;
|
|
entry->pev.event = strdup(note->name);
|
|
entry->pev.group = strdup(sdtgrp);
|
|
list_add_tail(&entry->node, &pcache->entries);
|
|
}
|
|
ret = asprintf(&buf, "p:%s/%s %s:0x%llx",
|
|
sdtgrp, note->name, pathname,
|
|
sdt_note__get_addr(note));
|
|
if (ret < 0)
|
|
break;
|
|
strlist__add(entry->tevlist, buf);
|
|
free(buf);
|
|
entry = NULL;
|
|
}
|
|
if (entry) {
|
|
list_del_init(&entry->node);
|
|
probe_cache_entry__delete(entry);
|
|
}
|
|
cleanup_sdt_note_list(&sdtlist);
|
|
return ret;
|
|
}
|
|
#endif
|
|
|
|
static int probe_cache_entry__write(struct probe_cache_entry *entry, int fd)
|
|
{
|
|
struct str_node *snode;
|
|
struct stat st;
|
|
struct iovec iov[3];
|
|
const char *prefix = entry->sdt ? "%" : "#";
|
|
int ret;
|
|
/* Save stat for rollback */
|
|
ret = fstat(fd, &st);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
pr_debug("Writing cache: %s%s\n", prefix, entry->spev);
|
|
iov[0].iov_base = (void *)prefix; iov[0].iov_len = 1;
|
|
iov[1].iov_base = entry->spev; iov[1].iov_len = strlen(entry->spev);
|
|
iov[2].iov_base = (void *)"\n"; iov[2].iov_len = 1;
|
|
ret = writev(fd, iov, 3);
|
|
if (ret < (int)iov[1].iov_len + 2)
|
|
goto rollback;
|
|
|
|
strlist__for_each_entry(snode, entry->tevlist) {
|
|
iov[0].iov_base = (void *)snode->s;
|
|
iov[0].iov_len = strlen(snode->s);
|
|
iov[1].iov_base = (void *)"\n"; iov[1].iov_len = 1;
|
|
ret = writev(fd, iov, 2);
|
|
if (ret < (int)iov[0].iov_len + 1)
|
|
goto rollback;
|
|
}
|
|
return 0;
|
|
|
|
rollback:
|
|
/* Rollback to avoid cache file corruption */
|
|
if (ret > 0)
|
|
ret = -1;
|
|
if (ftruncate(fd, st.st_size) < 0)
|
|
ret = -2;
|
|
|
|
return ret;
|
|
}
|
|
|
|
int probe_cache__commit(struct probe_cache *pcache)
|
|
{
|
|
struct probe_cache_entry *entry;
|
|
int ret = 0;
|
|
|
|
/* TBD: if we do not update existing entries, skip it */
|
|
ret = lseek(pcache->fd, 0, SEEK_SET);
|
|
if (ret < 0)
|
|
goto out;
|
|
|
|
ret = ftruncate(pcache->fd, 0);
|
|
if (ret < 0)
|
|
goto out;
|
|
|
|
for_each_probe_cache_entry(entry, pcache) {
|
|
ret = probe_cache_entry__write(entry, pcache->fd);
|
|
pr_debug("Cache committed: %d\n", ret);
|
|
if (ret < 0)
|
|
break;
|
|
}
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static bool probe_cache_entry__compare(struct probe_cache_entry *entry,
|
|
struct strfilter *filter)
|
|
{
|
|
char buf[128], *ptr = entry->spev;
|
|
|
|
if (entry->pev.event) {
|
|
snprintf(buf, 128, "%s:%s", entry->pev.group, entry->pev.event);
|
|
ptr = buf;
|
|
}
|
|
return strfilter__compare(filter, ptr);
|
|
}
|
|
|
|
int probe_cache__filter_purge(struct probe_cache *pcache,
|
|
struct strfilter *filter)
|
|
{
|
|
struct probe_cache_entry *entry, *tmp;
|
|
|
|
list_for_each_entry_safe(entry, tmp, &pcache->entries, node) {
|
|
if (probe_cache_entry__compare(entry, filter)) {
|
|
pr_info("Removed cached event: %s\n", entry->spev);
|
|
list_del_init(&entry->node);
|
|
probe_cache_entry__delete(entry);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int probe_cache__show_entries(struct probe_cache *pcache,
|
|
struct strfilter *filter)
|
|
{
|
|
struct probe_cache_entry *entry;
|
|
|
|
for_each_probe_cache_entry(entry, pcache) {
|
|
if (probe_cache_entry__compare(entry, filter))
|
|
printf("%s\n", entry->spev);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* Show all cached probes */
|
|
int probe_cache__show_all_caches(struct strfilter *filter)
|
|
{
|
|
struct probe_cache *pcache;
|
|
struct strlist *bidlist;
|
|
struct str_node *nd;
|
|
char *buf = strfilter__string(filter);
|
|
|
|
pr_debug("list cache with filter: %s\n", buf);
|
|
free(buf);
|
|
|
|
bidlist = build_id_cache__list_all(true);
|
|
if (!bidlist) {
|
|
pr_debug("Failed to get buildids: %d\n", errno);
|
|
return -EINVAL;
|
|
}
|
|
strlist__for_each_entry(nd, bidlist) {
|
|
pcache = probe_cache__new(nd->s);
|
|
if (!pcache)
|
|
continue;
|
|
if (!list_empty(&pcache->entries)) {
|
|
buf = build_id_cache__origname(nd->s);
|
|
printf("%s (%s):\n", buf, nd->s);
|
|
free(buf);
|
|
probe_cache__show_entries(pcache, filter);
|
|
}
|
|
probe_cache__delete(pcache);
|
|
}
|
|
strlist__delete(bidlist);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct {
|
|
const char *pattern;
|
|
bool avail;
|
|
bool checked;
|
|
} probe_type_table[] = {
|
|
#define DEFINE_TYPE(idx, pat, def_avail) \
|
|
[idx] = {.pattern = pat, .avail = (def_avail)}
|
|
DEFINE_TYPE(PROBE_TYPE_U, "* u8/16/32/64,*", true),
|
|
DEFINE_TYPE(PROBE_TYPE_S, "* s8/16/32/64,*", true),
|
|
DEFINE_TYPE(PROBE_TYPE_X, "* x8/16/32/64,*", false),
|
|
DEFINE_TYPE(PROBE_TYPE_STRING, "* string,*", true),
|
|
DEFINE_TYPE(PROBE_TYPE_BITFIELD,
|
|
"* b<bit-width>@<bit-offset>/<container-size>", true),
|
|
};
|
|
|
|
bool probe_type_is_available(enum probe_type type)
|
|
{
|
|
FILE *fp;
|
|
char *buf = NULL;
|
|
size_t len = 0;
|
|
bool target_line = false;
|
|
bool ret = probe_type_table[type].avail;
|
|
|
|
if (type >= PROBE_TYPE_END)
|
|
return false;
|
|
/* We don't have to check the type which supported by default */
|
|
if (ret || probe_type_table[type].checked)
|
|
return ret;
|
|
|
|
if (asprintf(&buf, "%s/README", tracing_path) < 0)
|
|
return ret;
|
|
|
|
fp = fopen(buf, "r");
|
|
if (!fp)
|
|
goto end;
|
|
|
|
zfree(&buf);
|
|
while (getline(&buf, &len, fp) > 0 && !ret) {
|
|
if (!target_line) {
|
|
target_line = !!strstr(buf, " type: ");
|
|
if (!target_line)
|
|
continue;
|
|
} else if (strstr(buf, "\t ") != buf)
|
|
break;
|
|
ret = strglobmatch(buf, probe_type_table[type].pattern);
|
|
}
|
|
/* Cache the result */
|
|
probe_type_table[type].checked = true;
|
|
probe_type_table[type].avail = ret;
|
|
|
|
fclose(fp);
|
|
end:
|
|
free(buf);
|
|
|
|
return ret;
|
|
}
|