perf callchain: Move validate_callchain to callchain lib

Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

3 files changed, 11 insertions, 14 deletions

diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 196473b51257..1cae87713792 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -123,19 +123,6 @@ static int perf_session__add_hist_entry(struct perf_session *self,
         return 0;
 }
 
-static int validate_chain(struct ip_callchain *chain, event_t *event)
-{
-        unsigned int chain_size;
-
-        chain_size = event->header.size;
-        chain_size -= (unsigned long)&event->ip.__more_data - (unsigned long)event;
-
-        if (chain->nr*sizeof(u64) > chain_size)
-                return -1;
-
-        return 0;
-}
-
 static int add_event_total(struct perf_session *session,
                            struct sample_data *data,
                            struct perf_event_attr *attr)
@@ -171,7 +158,7 @@ static int process_sample_event(event_t *event, struct perf_session *session)
 
                 dump_printf("... chain: nr:%Lu\n", data.callchain->nr);
 
-                if (validate_chain(data.callchain, event) < 0) {
+                if (!ip_callchain__valid(data.callchain, event)) {
                         pr_debug("call-chain problem with event, "
                                  "skipping it.\n");
                         return 0;
diff --git a/tools/perf/util/callchain.c b/tools/perf/util/callchain.c
index db628af6d20d..ac148613afe8 100644
--- a/tools/perf/util/callchain.c
+++ b/tools/perf/util/callchain.c
@@ -17,6 +17,13 @@
 
 #include "callchain.h"
 
+bool ip_callchain__valid(struct ip_callchain *chain, event_t *event)
+{
+        unsigned int chain_size = event->header.size;
+        chain_size -= (unsigned long)&event->ip.__more_data - (unsigned long)event;
+        return chain->nr * sizeof(u64) <= chain_size;
+}
+
 #define chain_for_each_child(child, parent)     \
         list_for_each_entry(child, &parent->children, brothers)
 
diff --git a/tools/perf/util/callchain.h b/tools/perf/util/callchain.h
index 8a7e8bbd0fda..0f4da093cbd8 100644
--- a/tools/perf/util/callchain.h
+++ b/tools/perf/util/callchain.h
@@ -4,6 +4,7 @@
 #include "../perf.h"
 #include <linux/list.h>
 #include <linux/rbtree.h>
+#include "event.h"
 #include "util.h"
 #include "symbol.h"
 
@@ -58,4 +59,6 @@ static inline u64 cumul_hits(struct callchain_node *node)
 int register_callchain_param(struct callchain_param *param);
 int append_chain(struct callchain_node *root, struct ip_callchain *chain,
                  struct map_symbol *syms);
+
+bool ip_callchain__valid(struct ip_callchain *chain, event_t *event);
 #endif  /* __PERF_CALLCHAIN_H */