perf probe: Fix add-probe command syntax without --add option

Fix add-probe command syntax without --add option.
perf-probe supports add-probe command without --add
option. But it treats each argument as an event definition.
e.g.

perf probe func arg1 arg2

 is interpreted as

perf probe --add func --add arg1 --add arg2

But it may be useless in many cases.

This patch fixes this syntax to fold those arguments into
one event definition if there is no --add option. With this
change, above command is interpreted as below;

perf probe --add "func arg1 arg2"

Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Jim Keniston <jkenisto@us.ibm.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Frank Ch. Eigler <fche@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jason Baron <jbaron@redhat.com>
Cc: K.Prasad <prasad@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: systemtap <systemtap@sources.redhat.com>
Cc: DLE <dle-develop@lists.sourceforge.net>
LKML-Reference: <20091208220254.10142.73767.stgit@dhcp-100-2-132.bos.redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 26 insertions, 7 deletions

diff --git a/tools/perf/builtin-probe.c b/tools/perf/builtin-probe.c
index 8993a1f4e1c3..1347fdf5337e 100644
--- a/tools/perf/builtin-probe.c
+++ b/tools/perf/builtin-probe.c
@@ -79,6 +79,25 @@ static void parse_probe_event(const char *str)
         pr_debug("%d arguments\n", pp->nr_args);
 }
 
+static void parse_probe_event_argv(int argc, const char **argv)
+{
+        int i, len;
+        char *buf;
+
+        /* Bind up rest arguments */
+        len = 0;
+        for (i = 0; i < argc; i++)
+                len += strlen(argv[i]) + 1;
+        buf = zalloc(len + 1);
+        if (!buf)
+                die("Failed to allocate memory for binding arguments.");
+        len = 0;
+        for (i = 0; i < argc; i++)
+                len += sprintf(&buf[len], "%s ", argv[i]);
+        parse_probe_event(buf);
+        free(buf);
+}
+
 static int opt_add_probe_event(const struct option *opt __used,
                               const char *str, int unset __used)
 {
@@ -160,7 +179,7 @@ static const struct option options[] = {
 
 int cmd_probe(int argc, const char **argv, const char *prefix __used)
 {
-        int i, j, ret;
+        int i, ret;
 #ifndef NO_LIBDWARF
         int fd;
 #endif
@@ -168,8 +187,8 @@ int cmd_probe(int argc, const char **argv, const char *prefix __used)
 
         argc = parse_options(argc, argv, options, probe_usage,
                              PARSE_OPT_STOP_AT_NON_OPTION);
-        for (i = 0; i < argc; i++)
-                parse_probe_event(argv[i]);
+        if (argc > 0)
+                parse_probe_event_argv(argc, argv);
 
         if ((session.nr_probe == 0 && !listing) ||
             (session.nr_probe != 0 && listing))
@@ -200,8 +219,8 @@ int cmd_probe(int argc, const char **argv, const char *prefix __used)
         }
 
         /* Searching probe points */
-        for (j = 0; j < session.nr_probe; j++) {
-                pp = &session.probes[j];
+        for (i = 0; i < session.nr_probe; i++) {
+                pp = &session.probes[i];
                 if (pp->found)
                         continue;
 
@@ -223,8 +242,8 @@ end_dwarf:
 #endif /* !NO_LIBDWARF */
 
         /* Synthesize probes without dwarf */
-        for (j = 0; j < session.nr_probe; j++) {
-                pp = &session.probes[j];
+        for (i = 0; i < session.nr_probe; i++) {
+                pp = &session.probes[i];
                 if (pp->found)  /* This probe is already found. */
                         continue;