perf probe: List probes with line number and file name
Improve --list to show current exist probes with line number and
file name. This enables user easily to check which line is
already probed.
for example:
./perf probe --list
probe:vfs_read (on vfs_read:8@linux-2.6-tip/fs/read_write.c)
Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Cc: systemtap <systemtap@sources.redhat.com>
Cc: DLE <dle-develop@lists.sourceforge.net>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <20100316220619.32050.48702.stgit@localhost6.localdomain6>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
index b44ddfb..4e3c1ae 100644
--- a/tools/perf/util/probe-event.c
+++ b/tools/perf/util/probe-event.c
@@ -70,7 +70,6 @@
return ret;
}
-
static struct map_groups kmap_groups;
static struct map *kmaps[MAP__NR_TYPES];
@@ -357,27 +356,39 @@
/* Compose only probe point (not argument) */
static char *synthesize_perf_probe_point(struct perf_probe_point *pp)
{
- char *buf;
- char offs[64] = "", line[64] = "";
- int ret;
+ char *buf, *tmp;
+ char offs[32] = "", line[32] = "", file[32] = "";
+ int ret, len;
buf = xzalloc(MAX_CMDLEN);
if (pp->offset) {
- ret = e_snprintf(offs, 64, "+%lu", pp->offset);
+ ret = e_snprintf(offs, 32, "+%lu", pp->offset);
if (ret <= 0)
goto error;
}
if (pp->line) {
- ret = e_snprintf(line, 64, ":%d", pp->line);
+ ret = e_snprintf(line, 32, ":%d", pp->line);
+ if (ret <= 0)
+ goto error;
+ }
+ if (pp->file) {
+ len = strlen(pp->file) - 32;
+ if (len < 0)
+ len = 0;
+ tmp = strchr(pp->file + len, '/');
+ if (!tmp)
+ tmp = pp->file + len - 1;
+ ret = e_snprintf(file, 32, "@%s", tmp + 1);
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);
+ ret = e_snprintf(buf, MAX_CMDLEN, "%s%s%s%s%s", pp->function,
+ offs, pp->retprobe ? "%return" : "", line,
+ file);
else
- ret = e_snprintf(buf, MAX_CMDLEN, "%s%s", pp->file, line);
+ ret = e_snprintf(buf, MAX_CMDLEN, "%s%s", file, line);
if (ret <= 0)
goto error;
@@ -511,15 +522,32 @@
{
char buf[64];
int i;
+#ifndef NO_DWARF_SUPPORT
+ struct symbol *sym;
+ int fd, ret = 0;
- pev->event = xstrdup(tev->event);
- pev->group = xstrdup(tev->group);
-
+ sym = map__find_symbol_by_name(kmaps[MAP__FUNCTION],
+ tev->point.symbol, NULL);
+ if (sym) {
+ fd = open_vmlinux();
+ ret = find_perf_probe_point(fd, sym->start + tev->point.offset,
+ &pev->point);
+ close(fd);
+ }
+ if (ret <= 0) {
+ pev->point.function = xstrdup(tev->point.symbol);
+ pev->point.offset = tev->point.offset;
+ }
+#else
/* Convert trace_point to probe_point */
pev->point.function = xstrdup(tev->point.symbol);
pev->point.offset = tev->point.offset;
+#endif
pev->point.retprobe = tev->point.retprobe;
+ pev->event = xstrdup(tev->event);
+ pev->group = xstrdup(tev->group);
+
/* Convert trace_arg to probe_arg */
pev->nargs = tev->nargs;
pev->args = xzalloc(sizeof(struct perf_probe_arg) * pev->nargs);
@@ -650,7 +678,7 @@
ret = e_snprintf(buf, 128, "%s:%s", pev->group, pev->event);
if (ret < 0)
die("Failed to copy event: %s", strerror(-ret));
- printf(" %-40s (on %s", buf, place);
+ printf(" %-20s (on %s", buf, place);
if (pev->nargs > 0) {
printf(" with");
@@ -671,6 +699,7 @@
struct str_node *ent;
setup_pager();
+ init_vmlinux();
memset(&tev, 0, sizeof(tev));
memset(&pev, 0, sizeof(pev));