aboutsummaryrefslogtreecommitdiff
path: root/tools/perf/builtin-top.c
diff options
context:
space:
mode:
authorArnaldo Carvalho de Melo <acme@redhat.com>2010-03-15 11:46:58 -0300
committerIngo Molnar <mingo@elte.hu>2010-03-15 16:08:42 +0100
commitb0a9ab62ab96e258a0ddd81d7fe2719c3db36006 (patch)
treef86b57423ac24262533a11fae4c5dc72f7b912bd /tools/perf/builtin-top.c
parentbedbfdea31daf3880745001d56450c683959ee7e (diff)
downloadlinux-2.6.34-ux500-b0a9ab62ab96e258a0ddd81d7fe2719c3db36006.tar.gz
perf top: Properly notify the user that vmlinux is missing
Before this patch this message would very briefly appear on the screen and then the screen would get updates only on the top, for number of interrupts received, etc, but no annotation would be performed: [root@doppio linux-2.6-tip]# perf top -s n_tty_write > /tmp/bla objdump: '[kernel.kallsyms]': No such file Now this is what the user gets: [root@doppio linux-2.6-tip]# perf top -s n_tty_write Can't annotate n_tty_write: No vmlinux file was found in the path: [0] vmlinux [1] /boot/vmlinux [2] /boot/vmlinux-2.6.33-rc5 [3] /lib/modules/2.6.33-rc5/build/vmlinux [4] /usr/lib/debug/lib/modules/2.6.33-rc5/vmlinux [root@doppio linux-2.6-tip]# This bug was introduced when we added automatic search for vmlinux, before that time the user had to specify a vmlinux file. Reported-by: David S. Miller <davem@davemloft.net> Reported-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: <stable@kernel.org> LKML-Reference: <1268664418-28328-2-git-send-email-acme@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'tools/perf/builtin-top.c')
-rw-r--r--tools/perf/builtin-top.c33
1 files changed, 25 insertions, 8 deletions
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 57e232f13bc..c968bd3391e 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -169,7 +169,7 @@ static void sig_winch_handler(int sig __used)
update_print_entries(&winsize);
}
-static void parse_source(struct sym_entry *syme)
+static int parse_source(struct sym_entry *syme)
{
struct symbol *sym;
struct sym_entry_source *source;
@@ -180,12 +180,21 @@ static void parse_source(struct sym_entry *syme)
u64 len;
if (!syme)
- return;
+ return -1;
+
+ sym = sym_entry__symbol(syme);
+ map = syme->map;
+
+ /*
+ * We can't annotate with just /proc/kallsyms
+ */
+ if (map->dso->origin == DSO__ORIG_KERNEL)
+ return -1;
if (syme->src == NULL) {
syme->src = zalloc(sizeof(*source));
if (syme->src == NULL)
- return;
+ return -1;
pthread_mutex_init(&syme->src->lock, NULL);
}
@@ -195,9 +204,6 @@ static void parse_source(struct sym_entry *syme)
pthread_mutex_lock(&source->lock);
goto out_assign;
}
-
- sym = sym_entry__symbol(syme);
- map = syme->map;
path = map->dso->long_name;
len = sym->end - sym->start;
@@ -209,7 +215,7 @@ static void parse_source(struct sym_entry *syme)
file = popen(command, "r");
if (!file)
- return;
+ return -1;
pthread_mutex_lock(&source->lock);
source->lines_tail = &source->lines;
@@ -245,6 +251,7 @@ static void parse_source(struct sym_entry *syme)
out_assign:
sym_filter_entry = syme;
pthread_mutex_unlock(&source->lock);
+ return 0;
}
static void __zero_source_counters(struct sym_entry *syme)
@@ -991,7 +998,17 @@ static void event__process_sample(const event_t *self,
if (sym_filter_entry_sched) {
sym_filter_entry = sym_filter_entry_sched;
sym_filter_entry_sched = NULL;
- parse_source(sym_filter_entry);
+ if (parse_source(sym_filter_entry) < 0) {
+ struct symbol *sym = sym_entry__symbol(sym_filter_entry);
+
+ pr_err("Can't annotate %s", sym->name);
+ if (sym_filter_entry->map->dso->origin == DSO__ORIG_KERNEL) {
+ pr_err(": No vmlinux file was found in the path:\n");
+ vmlinux_path__fprintf(stderr);
+ } else
+ pr_err(".\n");
+ exit(1);
+ }
}
syme = symbol__priv(al.sym);