OPT_PID,
OPT_CHILD,
OPT_HOSTNAME,
+ OPT_KPROBES,
};
static struct poptOption long_options[] = {
{ "child", 'f', POPT_ARG_NONE, NULL, OPT_CHILD, NULL, NULL },
{ "pid", 'p', POPT_ARG_STRING, &opt_tid, OPT_PID, NULL, NULL },
{ "hostname", 'n', POPT_ARG_STRING, &opt_hostname, OPT_HOSTNAME, NULL, NULL },
+ { "kprobes", 'k', POPT_ARG_STRING, &opt_kprobes, OPT_KPROBES, NULL, NULL },
{ NULL, 0, 0, NULL, 0, NULL, NULL },
};
printf("%s", bt_ctf_get_string(list[i]));
} else if (type == CTF_TYPE_ARRAY) {
str = bt_ctf_get_char_array(list[i]);
- if (str)
+ if (!bt_ctf_field_get_error() && str)
printf("%s", str);
}
}
cpu_id = get_cpu_id(call_data);
procname = get_context_comm(call_data);
- if (strcmp(bt_ctf_event_name(call_data), "exit_syscall") == 0) {
+ if ((strcmp(bt_ctf_event_name(call_data), "exit_syscall") == 0) &&
+ !last_textdump_print_newline) {
scope = bt_ctf_get_top_level_scope(call_data,
BT_EVENT_FIELDS);
syscall_ret = bt_ctf_get_int64(bt_ctf_get_field(call_data,
bt_ctf_event_name(call_data));
print_fields(call_data);
printf(") ");
- /*
- if (strncmp(bt_ctf_event_name(call_data), "sys_", 4) == 0) {
- } else {
+ if (strncmp(bt_ctf_event_name(call_data), "sys_", 4) != 0) {
printf("\n");
+ last_textdump_print_newline = 1;
+ } else {
+ last_textdump_print_newline = 0;
}
- */
- last_textdump_print_newline = 0;
}
end:
return BT_CB_ERROR_STOP;
}
+enum bt_cb_ret handle_kprobes(struct bt_ctf_event *call_data, void *private_data)
+{
+ int i;
+ struct kprobes *kprobe;
+
+ /* for kprobes */
+ for (i = 0; i < lttngtop.kprobes_table->len; i++) {
+ kprobe = g_ptr_array_index(lttngtop.kprobes_table, i);
+ if (strcmp(bt_ctf_event_name(call_data), kprobe->probe_name) == 0) {
+ kprobe->count++;
+ }
+ }
+
+ return BT_CB_OK;
+}
+
/*
* hook on each event to check the timestamp and refresh the display if
* necessary
fprintf(fp, " -n, --hostname Comma-separated list of hostnames to display (require hostname context in trace)\n");
}
+/*
+ * Parse probe options.
+ * Shamelessly stolen from lttng-tools :
+ * src/bin/lttng/commands/enable_events.c
+ */
+static struct kprobes *parse_probe_opts(char *opt)
+{
+ char s_hex[19];
+ char name[LTTNG_SYMBOL_NAME_LEN];
+ struct kprobes *kprobe;
+ int ret;
+
+ /*
+ kprobe->probe_addr = 0;
+ kprobe->probe_offset = 0;
+ asprintf(&kprobe->probe_name, "probe_sys_open");
+ asprintf(&kprobe->symbol_name, "sys_open");
+ */
+
+ if (opt == NULL) {
+ kprobe = NULL;
+ goto end;
+ }
+
+ kprobe = g_new0(struct kprobes, 1);
+
+ /* Check for symbol+offset */
+ ret = sscanf(opt, "%[^'+']+%s", name, s_hex);
+ if (ret == 2) {
+ asprintf(&kprobe->probe_name, "probe_%s", name);
+ asprintf(&kprobe->symbol_name, "%s", name);
+
+ if (strlen(s_hex) == 0) {
+ fprintf(stderr, "Invalid probe offset %s", s_hex);
+ ret = -1;
+ goto end;
+ }
+ kprobe->probe_offset = strtoul(s_hex, NULL, 0);
+ kprobe->probe_addr = 0;
+ goto end;
+ }
+
+ /* Check for symbol */
+ if (isalpha(name[0])) {
+ ret = sscanf(opt, "%s", name);
+ if (ret == 1) {
+ asprintf(&kprobe->probe_name, "probe_%s", name);
+ asprintf(&kprobe->symbol_name, "%s", name);
+ kprobe->probe_offset = 0;
+ kprobe->probe_addr = 0;
+ goto end;
+ }
+ }
+
+ /* Check for address */
+ ret = sscanf(opt, "%s", s_hex);
+ if (ret > 0) {
+ if (strlen(s_hex) == 0) {
+ fprintf(stderr, "Invalid probe address %s", s_hex);
+ ret = -1;
+ goto end;
+ }
+ asprintf(&kprobe->probe_name, "probe_%s", s_hex);
+ kprobe->probe_offset = 0;
+ kprobe->probe_addr = strtoul(s_hex, NULL, 0);
+ goto end;
+ }
+
+ /* No match */
+ kprobe = NULL;
+
+end:
+ return kprobe;
+}
+
/*
* Return 0 if caller should continue, < 0 if caller should return
* error, > 0 if caller should exit without reporting error.
tmp_str = strtok(NULL, ",");
}
break;
+ case OPT_KPROBES:
+ lttngtop.kprobes_table = g_ptr_array_new();
+ tmp_str = strtok(opt_kprobes, ",");
+ while (tmp_str) {
+ struct kprobes *kprobe;
+
+ kprobe = parse_probe_opts(tmp_str);
+ if (kprobe) {
+ g_ptr_array_add(
+ lttngtop.kprobes_table,
+ kprobe);
+ } else {
+ ret = -EINVAL;
+ goto end;
+ }
+ tmp_str = strtok(NULL, ",");
+ }
+ break;
default:
ret = -EINVAL;
goto end;
{
struct bt_ctf_iter *iter;
struct bt_iter_pos begin_pos;
+ struct kprobes *kprobe;
const struct bt_ctf_event *event;
+ int i;
int ret = 0;
begin_pos.type = BT_SEEK_BEGIN;
"lttng_statedump_file_descriptor"),
NULL, 0, handle_statedump_file_descriptor,
NULL, NULL, NULL);
+
+ /* for kprobes */
+ for (i = 0; i < lttngtop.kprobes_table->len; i++) {
+ kprobe = g_ptr_array_index(lttngtop.kprobes_table, i);
+ bt_ctf_iter_add_callback(iter,
+ g_quark_from_static_string(
+ kprobe->probe_name),
+ NULL, 0, handle_kprobes,
+ NULL, NULL, NULL);
+ }
}
- while ((event = bt_ctf_iter_read_event(iter, NULL)) != NULL) {
+ while ((event = bt_ctf_iter_read_event(iter)) != NULL) {
if (quit || reload_trace)
goto end_iter;
ret = bt_iter_next(bt_ctf_get_iter(iter));
return ret;
}
+int enable_kprobes(struct lttng_handle *handle, char *channel_name)
+{
+ struct lttng_event ev;
+ struct kprobes *kprobe;
+ int ret = 0;
+ int i;
+
+ for (i = 0; i < lttngtop.kprobes_table->len; i++) {
+ kprobe = g_ptr_array_index(lttngtop.kprobes_table, i);
+
+ memset(&ev, '\0', sizeof(struct lttng_event));
+ ev.type = LTTNG_EVENT_PROBE;
+ if (kprobe->symbol_name)
+ sprintf(ev.attr.probe.symbol_name, "%s", kprobe->symbol_name);
+ sprintf(ev.name, "%s", kprobe->probe_name);
+ ev.attr.probe.addr = kprobe->probe_addr;
+ ev.attr.probe.offset = kprobe->probe_offset;
+ if ((ret = lttng_enable_event(handle, &ev, channel_name)) < 0) {
+ fprintf(stderr,"error enabling kprobes : %s\n",
+ helper_lttcomm_get_readable_code(ret));
+ goto end;
+ }
+ }
+
+end:
+ return ret;
+}
+
int setup_live_tracing()
{
struct lttng_domain dom;
goto error_session;
}
+ memset(&ev, '\0', sizeof(struct lttng_event));
ev.type = LTTNG_EVENT_SYSCALL;
if ((ret = lttng_enable_event(handle, &ev, channel_name)) < 0) {
fprintf(stderr,"error enabling syscalls : %s\n",
goto error_session;
}
+ ret = enable_kprobes(handle, channel_name);
+ if (ret < 0) {
+ goto error_session;
+ }
+
kctxpid.ctx = LTTNG_EVENT_CONTEXT_PID;
lttng_add_context(handle, &kctxpid, NULL, NULL);
kctxtid.ctx = LTTNG_EVENT_CONTEXT_TID;
signal(SIGTERM, handle_textdump_sigterm);
signal(SIGINT, handle_textdump_sigterm);
}
+ init_lttngtop();
ret = setup_live_tracing();
if (ret < 0) {
goto end;
}
- init_lttngtop();
if (!opt_textdump) {
pthread_create(&display_thread, NULL, ncurses_display, (void *) NULL);
pthread_create(&timer_thread, NULL, refresh_thread, (void *) NULL);
projects / lttngtop.git / blobdiff