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authorMasami Hiramatsu <mhiramat@redhat.com>2009-12-15 16:32:47 +0100
committerIngo Molnar <mingo@elte.hu>2009-12-15 20:22:05 +0100
commit7ef17aafc98406d01ebbf7fe98ef1332b70d20bb (patch)
tree83211db3bb008b7d5a1224cf499f33591ced4708 /tools/perf/util/probe-event.c
parentperf probe: Check symbols in symtab/kallsyms (diff)
downloadlinux-7ef17aafc98406d01ebbf7fe98ef1332b70d20bb.tar.xz
linux-7ef17aafc98406d01ebbf7fe98ef1332b70d20bb.zip
perf probe: Fix to show which probe point is not found
Fix perf probe to show which probe point is not found. With out this patch, it shows just "No probe point found." This doesn't help users if they specify several probes. e.g. # perf probe -f --add schedule --add test Fatal: No probe point found. This patch makes error message more helpful as below. # perf probe --add schedule --add test Fatal: Probe point 'test' not found. - probe not added. Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@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: 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: systemtap <systemtap@sources.redhat.com> Cc: DLE <dle-develop@lists.sourceforge.net> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <20091215153247.17436.49068.stgit@dhcp-100-2-132.bos.redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'tools/perf/util/probe-event.c')
-rw-r--r--tools/perf/util/probe-event.c34
1 files changed, 24 insertions, 10 deletions
diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
index b05d532a4e4c..2ca62154f79b 100644
--- a/tools/perf/util/probe-event.c
+++ b/tools/perf/util/probe-event.c
@@ -249,11 +249,12 @@ void parse_trace_kprobe_event(const char *str, struct probe_point *pp)
argv_free(argv);
}
-int synthesize_perf_probe_event(struct probe_point *pp)
+/* Synthesize only probe point (not argument) */
+int synthesize_perf_probe_point(struct probe_point *pp)
{
char *buf;
char offs[64] = "", line[64] = "";
- int i, len, ret;
+ int ret;
pp->probes[0] = buf = zalloc(MAX_CMDLEN);
if (!buf)
@@ -274,10 +275,24 @@ int synthesize_perf_probe_event(struct probe_point *pp)
offs, pp->retprobe ? "%return" : "", line);
else
ret = e_snprintf(buf, MAX_CMDLEN, "%s%s", pp->file, line);
- if (ret <= 0)
- goto error;
- len = ret;
+ if (ret <= 0) {
+error:
+ free(pp->probes[0]);
+ pp->probes[0] = NULL;
+ }
+ return ret;
+}
+
+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]);
@@ -290,6 +305,7 @@ int synthesize_perf_probe_event(struct probe_point *pp)
return pp->found;
error:
free(pp->probes[0]);
+ pp->probes[0] = NULL;
return ret;
}
@@ -319,6 +335,7 @@ int synthesize_trace_kprobe_event(struct probe_point *pp)
return pp->found;
error:
free(pp->probes[0]);
+ pp->probes[0] = NULL;
return ret;
}
@@ -418,7 +435,7 @@ static void show_perf_probe_event(const char *event, const char *place,
/* List up current perf-probe events */
void show_perf_probe_events(void)
{
- int fd, nr;
+ int fd;
struct probe_point pp;
struct strlist *rawlist;
struct str_node *ent;
@@ -430,10 +447,7 @@ void show_perf_probe_events(void)
strlist__for_each(ent, rawlist) {
parse_trace_kprobe_event(ent->s, &pp);
/* Synthesize only event probe point */
- nr = pp.nr_args;
- pp.nr_args = 0;
- synthesize_perf_probe_event(&pp);
- pp.nr_args = nr;
+ synthesize_perf_probe_point(&pp);
/* Show an event */
show_perf_probe_event(pp.event, pp.probes[0], &pp);
clear_probe_point(&pp);