[PATCH perf/core v11 05/20] perf probe: Recover and export synthesize_perf_probe_point()

Masami Hiramatsu
2016-06-15T03:28:28Z

Recover and export synthesize_perf_probe_point() which had
once introduced but disabled long time. This renew the
code and re-enable it.

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
---
Changes in v10:
- Splited from "Add --cache option to cache the probe definitions"
---
tools/perf/util/probe-event.c | 39 ++++++++++++++++++++++-----------------
tools/perf/util/probe-event.h | 1 +
2 files changed, 23 insertions(+), 17 deletions(-)

diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
index 84f4b2b3..cbc8a8b 100644
--- a/tools/perf/util/probe-event.c
+++ b/tools/perf/util/probe-event.c
@@ -67,7 +67,6 @@ int e_snprintf(char *str, size_t size, const char *format, ...)
return ret;
}

-static char *synthesize_perf_probe_point(struct perf_probe_point *pp);
static struct machine *host_machine;

/* Initialize symbol maps and path of vmlinux/modules */
@@ -1716,7 +1715,7 @@ out:
}

/* Compose only probe point (not argument) */
-static char *synthesize_perf_probe_point(struct perf_probe_point *pp)
+char *synthesize_perf_probe_point(struct perf_probe_point *pp)
{
struct strbuf buf;
char *tmp, *ret = NULL;
@@ -1755,30 +1754,36 @@ out:
return ret;
}

-#if 0
char *synthesize_perf_probe_command(struct perf_probe_event *pev)
{
- char *buf;
- int i, len, ret;
+ struct strbuf buf;
+ char *tmp, *ret = NULL;
+ int i;

- buf = synthesize_perf_probe_point(&pev->point);
- if (!buf)
+ if (strbuf_init(&buf, 64))
return NULL;
+ if (pev->event)
+ if (strbuf_addf(&buf, "%s:%s=", pev->group ?: PERFPROBE_GROUP,
+ pev->event) < 0)
+ goto out;
+
+ tmp = synthesize_perf_probe_point(&pev->point);
+ if (!tmp || strbuf_addstr(&buf, tmp) < 0)
+ goto out;
+ free(tmp);

- len = strlen(buf);
for (i = 0; i < pev->nargs; i++) {
- ret = e_snprintf(&buf[len], MAX_CMDLEN - len, " %s",
- pev->args[i].name);
- if (ret <= 0) {
- free(buf);
- return NULL;
- }
- len += ret;
+ tmp = synthesize_perf_probe_arg(pev->args + i);
+ if (!tmp || strbuf_addf(&buf, " %s", tmp) < 0)
+ goto out;
+ free(tmp);
}

- return buf;
+ ret = strbuf_detach(&buf, NULL);
+out:
+ strbuf_release(&buf);
+ return ret;
}
-#endif

static int __synthesize_probe_trace_arg_ref(struct probe_trace_arg_ref *ref,
struct strbuf *buf, int depth)
diff --git a/tools/perf/util/probe-event.h b/tools/perf/util/probe-event.h
index 367f886..0b024ba 100644
--- a/tools/perf/util/probe-event.h
+++ b/tools/perf/util/probe-event.h
@@ -121,6 +121,7 @@ int parse_probe_trace_command(const char *cmd, struct probe_trace_event *tev);
char *synthesize_perf_probe_command(struct perf_probe_event *pev);
char *synthesize_probe_trace_command(struct probe_trace_event *tev);
char *synthesize_perf_probe_arg(struct perf_probe_arg *pa);
+char *synthesize_perf_probe_point(struct perf_probe_point *pp);

int perf_probe_event__copy(struct perf_probe_event *dst,
struct perf_probe_event *src);