int synthesize_trace_kprobe_event(struct probe_point *pp)
{
char *buf;
int i, len, ret;
pp->probes[0] = buf = zalloc(MAX_CMDLEN);
if (!buf)
die("Failed to allocate memory by zalloc.");
ret = e_snprintf(buf, MAX_CMDLEN, "%s+%d", pp->function, pp->offset);
if (ret <= 0)
goto error;
len = ret;
for (i = 0; i < pp->nr_args; i++) {
ret = e_snprintf(&buf[len], MAX_CMDLEN - len, " %s",
pp->args[i]);
if (ret <= 0)
goto error;
len += ret;
}
pp->found = 1;
return pp->found;
error:
free(pp->probes[0]);
pp->probes[0] = NULL;
return ret;
}
/* Synthesize only probe point (not argument) */
int synthesize_perf_probe_point(struct probe_point *pp)
{
char *buf;
char offs[64] = "", line[64] = "";
int ret;
pp->probes[0] = buf = zalloc(MAX_CMDLEN);
pp->found = 1;
if (!buf)
die("Failed to allocate memory by zalloc.");
if (pp->offset) {
ret = e_snprintf(offs, 64, "+%d", pp->offset);
if (ret <= 0)
goto error;
}
if (pp->line) {
ret = e_snprintf(line, 64, ":%d", pp->line);
if (ret <= 0)
goto error;
}
if (pp->function)
ret = e_snprintf(buf, MAX_CMDLEN, "%s%s%s%s", pp->function,
offs, pp->retprobe ? "%return" : "", line);
else
ret = e_snprintf(buf, MAX_CMDLEN, "%s%s", pp->file, line);
if (ret <= 0) {
error:
free(pp->probes[0]);
pp->probes[0] = NULL;
pp->found = 0;
}
return ret;
}
static struct strlist *__probe_file__get_namelist(int fd, bool include_group)
{
char buf[128];
struct strlist *sl, *rawlist;
struct str_node *ent;
struct probe_trace_event tev;
int ret = 0;
memset(&tev, 0, sizeof(tev));
rawlist = probe_file__get_rawlist(fd);
if (!rawlist)
return NULL;
sl = strlist__new(NULL, NULL);
strlist__for_each(ent, rawlist) {
ret = parse_probe_trace_command(ent->s, &tev);
if (ret < 0)
break;
if (include_group) {
ret = e_snprintf(buf, 128, "%s:%s", tev.group,
tev.event);
if (ret >= 0)
ret = strlist__add(sl, buf);
} else
ret = strlist__add(sl, tev.event);
clear_probe_trace_event(&tev);
if (ret < 0)
break;
}
int synthesize_perf_probe_event(struct probe_point *pp)
{
char *buf;
int i, len, ret;
len = synthesize_perf_probe_point(pp);
if (len < 0)
return 0;
buf = pp->probes[0];
for (i = 0; i < pp->nr_args; i++) {
ret = e_snprintf(&buf[len], MAX_CMDLEN - len, " %s",
pp->args[i]);
if (ret <= 0)
goto error;
len += ret;
}
pp->found = 1;
return pp->found;
error:
free(pp->probes[0]);
pp->probes[0] = NULL;
return ret;
}
/* Show an event */
static void show_perf_probe_event(const char *event, const char *place,
struct probe_point *pp)
{
int i, ret;
char buf[128];
ret = e_snprintf(buf, 128, "%s:%s", pp->group, event);
if (ret < 0)
die("Failed to copy event: %s", strerror(-ret));
printf(" %-40s (on %s", buf, place);
if (pp->nr_args > 0) {
printf(" with");
for (i = 0; i < pp->nr_args; i++)
printf(" %s", pp->args[i]);
}
printf(")\n");
}
static int open_probe_events(const char *trace_file, bool readwrite)
{
char buf[PATH_MAX];
const char *tracing_dir = "";
int ret;
ret = e_snprintf(buf, PATH_MAX, "%s/%s%s",
tracing_path, tracing_dir, trace_file);
if (ret >= 0) {
pr_debug("Opening %s write=%d\n", buf, readwrite);
if (readwrite && !probe_event_dry_run)
ret = open(buf, O_RDWR | O_APPEND, 0);
else
ret = open(buf, O_RDONLY, 0);
if (ret < 0)
ret = -errno;
}
return ret;
}
static int open_kprobe_events(int flags, int mode)
{
char buf[PATH_MAX];
int ret;
ret = e_snprintf(buf, PATH_MAX, "%s/../kprobe_events", debugfs_path);
if (ret < 0)
die("Failed to make kprobe_events path.");
ret = open(buf, flags, mode);
if (ret < 0) {
if (errno == ENOENT)
die("kprobe_events file does not exist -"
" please rebuild with CONFIG_KPROBE_EVENT.");
else
die("Could not open kprobe_events file: %s",
strerror(errno));
}
return ret;
}
