2 files changed, 84 insertions, 0 deletions

diff --git a/tools/perf/util/db-export.c b/tools/perf/util/db-export.c
index 4fc607c130b8..a0ca90c1fb50 100644
--- a/tools/perf/util/db-export.c
+++ b/tools/perf/util/db-export.c
@@ -23,6 +23,7 @@
 #include "event.h"
 #include "util.h"
 #include "thread-stack.h"
+#include "callchain.h"
 #include "call-path.h"
 #include "db-export.h"
 
@@ -277,6 +278,79 @@ 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,
+					sysctl_perf_event_max_stack);
+	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;
+		if (al.map)
+			al.addr = al.map->map_ip(al.map, node->ip);
+		else
+			al.addr = node->ip;
+
+		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)
 {
@@ -330,6 +404,14 @@ 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);
+	}
+
 	if ((evsel->attr.sample_type & PERF_SAMPLE_ADDR) &&
 	    sample_addr_correlates_sym(&evsel->attr)) {
 		struct addr_location addr_al;
diff --git a/tools/perf/util/db-export.h b/tools/perf/util/db-export.h
index 25e22fd76aca..f5daf552054c 100644
--- a/tools/perf/util/db-export.h
+++ b/tools/perf/util/db-export.h
@@ -27,6 +27,7 @@ struct dso;
 struct perf_sample;
 struct addr_location;
 struct call_return_processor;
+struct call_path_root;
 struct call_path;
 struct call_return;
 
@@ -64,6 +65,7 @@ struct db_export {
 	int (*export_call_return)(struct db_export *dbe,
 				  struct call_return *cr);
 	struct call_return_processor *crp;
+	struct call_path_root *cpr;
 	u64 evsel_last_db_id;
 	u64 machine_last_db_id;
 	u64 thread_last_db_id;