Merge tag 'mac80211-for-davem-2016-06-29-v2' of git://git.kernel.org/pub/scm/linux...

[cascardo/linux.git] / tools / perf / util / db-export.c

diff --git a/tools/perf/util/db-export.c b/tools/perf/util/db-export.c
index 049438d..c9a6dc1 100644 (file)
--- a/tools/perf/util/db-export.c
+++ b/tools/perf/util/db-export.c
@@ -23,6 +23,8 @@
 #include "event.h"
 #include "util.h"
 #include "thread-stack.h"
+#include "callchain.h"
+#include "call-path.h"
 #include "db-export.h"
 
 struct deferred_export {
@@ -258,8 +260,7 @@ static int db_ids_from_al(struct db_export *dbe, struct addr_location *al,
                if (!al->sym) {
                        al->sym = symbol__new(al->addr, 0, 0, "unknown");
                        if (al->sym)
-                               symbols__insert(&dso->symbols[al->map->type],
-                                               al->sym);
+                               dso__insert_symbol(dso, al->map->type, al->sym);
                }
 
                if (al->sym) {
@@ -276,6 +277,79 @@ static int db_ids_from_al(struct db_export *dbe, struct addr_location *al,
        return 0;
 }
 
+static struct call_path *call_path_from_sample(struct db_export *dbe,
+                                              struct machine *machine,
+                                              struct thread *thread,
+                                              struct perf_sample *sample,
+                                              struct perf_evsel *evsel)
+{
+       u64 kernel_start = machine__kernel_start(machine);
+       struct call_path *current = &dbe->cpr->call_path;
+       enum chain_order saved_order = callchain_param.order;
+       int err;
+
+       if (!symbol_conf.use_callchain || !sample->callchain)
+               return NULL;
+
+       /*
+        * Since the call path tree must be built starting with the root, we
+        * must use ORDER_CALL for call chain resolution, in order to process
+        * the callchain starting with the root node and ending with the leaf.
+        */
+       callchain_param.order = ORDER_CALLER;
+       err = thread__resolve_callchain(thread, &callchain_cursor, evsel,
+                                       sample, NULL, NULL, PERF_MAX_STACK_DEPTH);
+       if (err) {
+               callchain_param.order = saved_order;
+               return NULL;
+       }
+       callchain_cursor_commit(&callchain_cursor);
+
+       while (1) {
+               struct callchain_cursor_node *node;
+               struct addr_location al;
+               u64 dso_db_id = 0, sym_db_id = 0, offset = 0;
+
+               memset(&al, 0, sizeof(al));
+
+               node = callchain_cursor_current(&callchain_cursor);
+               if (!node)
+                       break;
+               /*
+                * Handle export of symbol and dso for this node by
+                * constructing an addr_location struct and then passing it to
+                * db_ids_from_al() to perform the export.
+                */
+               al.sym = node->sym;
+               al.map = node->map;
+               al.machine = machine;
+               al.addr = node->ip;
+
+               if (al.map && !al.sym)
+                       al.sym = dso__find_symbol(al.map->dso, MAP__FUNCTION,
+                                                 al.addr);
+
+               db_ids_from_al(dbe, &al, &dso_db_id, &sym_db_id, &offset);
+
+               /* add node to the call path tree if it doesn't exist */
+               current = call_path__findnew(dbe->cpr, current,
+                                            al.sym, node->ip,
+                                            kernel_start);
+
+               callchain_cursor_advance(&callchain_cursor);
+       }
+
+       /* Reset the callchain order to its prior value. */
+       callchain_param.order = saved_order;
+
+       if (current == &dbe->cpr->call_path) {
+               /* Bail because the callchain was empty. */
+               return NULL;
+       }
+
+       return current;
+}
+
 int db_export__branch_type(struct db_export *dbe, u32 branch_type,
                           const char *name)
 {
@@ -329,6 +403,16 @@ int db_export__sample(struct db_export *dbe, union perf_event *event,
        if (err)
                goto out_put;
 
+       if (dbe->cpr) {
+               struct call_path *cp = call_path_from_sample(dbe, al->machine,
+                                                            thread, sample,
+                                                            evsel);
+               if (cp) {
+                       db_export__call_path(dbe, cp);
+                       es.call_path_id = cp->db_id;
+               }
+       }
+
        if ((evsel->attr.sample_type & PERF_SAMPLE_ADDR) &&
            sample_addr_correlates_sym(&evsel->attr)) {
                struct addr_location addr_al;