From: Arnaldo Carvalho de Melo <acme@redhat.com>
Date: Wed, 14 Sep 2011 18:54:30 +0000 (-0300)
Subject: perf top: Fix userspace sample addr map offset
X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=af52aafad26fe83edc3ff95d6f630c2fc98a0c4c;p=openwrt%2Fstaging%2Fblogic.git

perf top: Fix userspace sample addr map offset

The 'perf top' tool came from the kernel where we had each DSO (vmlinux,
modules) loaded just once at a time.

But userspace may have DSOs loaded in multiple addresses (shared
libraries), requiring that we use the just resolved map instead of the
first one found.

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-ag53wz0yllpgers0n2w7hchp@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---

diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index a43433f08300..d28013b7d61c 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -191,7 +191,8 @@ static void __zero_source_counters(struct sym_entry *syme)
 	symbol__annotate_zero_histograms(sym);
 }
 
-static void record_precise_ip(struct sym_entry *syme, int counter, u64 ip)
+static void record_precise_ip(struct sym_entry *syme, struct map *map,
+			      int counter, u64 ip)
 {
 	struct annotation *notes;
 	struct symbol *sym;
@@ -205,8 +206,8 @@ static void record_precise_ip(struct sym_entry *syme, int counter, u64 ip)
 	if (pthread_mutex_trylock(&notes->lock))
 		return;
 
-	ip = syme->map->map_ip(syme->map, ip);
-	symbol__inc_addr_samples(sym, syme->map, counter, ip);
+	ip = map->map_ip(map, ip);
+	symbol__inc_addr_samples(sym, map, counter, ip);
 
 	pthread_mutex_unlock(&notes->lock);
 }
@@ -810,7 +811,7 @@ static void perf_event__process_sample(const union perf_event *event,
 		evsel = perf_evlist__id2evsel(top.evlist, sample->id);
 		assert(evsel != NULL);
 		syme->count[evsel->idx]++;
-		record_precise_ip(syme, evsel->idx, ip);
+		record_precise_ip(syme, al.map, evsel->idx, ip);
 		pthread_mutex_lock(&top.active_symbols_lock);
 		if (list_empty(&syme->node) || !syme->node.next) {
 			static bool first = true;