[RFC/PATCH 18/38] perf tools: Introduce thread__find_addr_location_by_time() and friends

[Namhyung Kim <namhyung@kernel.org>]

These new functions are for find appropriate map (and symbol) at the
given time when used with an indexed data file.  This is based on the
fact that map_groups list is sorted by time in the previous patch.

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
---
 tools/perf/util/event.c   | 59 +++++++++++++++++++++++++++++++++++++++--------
 tools/perf/util/machine.c | 28 ++++++++++++++--------
 tools/perf/util/session.h |  1 +
 tools/perf/util/thread.c  | 26 +++++++++++++++++++++
 tools/perf/util/thread.h  | 11 +++++++++
 5 files changed, 106 insertions(+), 19 deletions(-)

diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
index 887f18266ab5..c960cbcd30d4 100644
--- a/tools/perf/util/event.c
+++ b/tools/perf/util/event.c
@@ -895,16 +895,14 @@ int perf_event__process(struct perf_tool *tool __maybe_unused,
 	return machine__process_event(machine, event, sample);
 }
 
-void thread__find_addr_map(struct thread *thread, u8 cpumode,
-			   enum map_type type, u64 addr,
-			   struct addr_location *al)
+static void map_groups__find_addr_map(struct map_groups *mg, u8 cpumode,
+				      enum map_type type, u64 addr,
+				      struct addr_location *al)
 {
-	struct map_groups *mg = thread->mg;
 	struct machine *machine = mg->machine;
 	bool load_map = false;
 
 	al->machine = machine;
-	al->thread = thread;
 	al->addr = addr;
 	al->cpumode = cpumode;
 	al->filtered = 0;
@@ -973,6 +971,29 @@ try_again:
 	}
 }
 
+void thread__find_addr_map(struct thread *thread, u8 cpumode,
+			   enum map_type type, u64 addr,
+			   struct addr_location *al)
+{
+	al->thread = thread;
+	map_groups__find_addr_map(thread->mg, cpumode, type, addr, al);
+}
+
+void thread__find_addr_map_by_time(struct thread *thread, u8 cpumode,
+				   enum map_type type, u64 addr,
+				   struct addr_location *al, u64 timestamp)
+{
+	struct map_groups *mg;
+
+	if (perf_has_index)
+		mg = thread__get_map_groups(thread, timestamp);
+	else
+		mg = thread->mg;
+
+	al->thread = thread;
+	map_groups__find_addr_map(mg, cpumode, type, addr, al);
+}
+
 void thread__find_addr_location(struct thread *thread,
 				u8 cpumode, enum map_type type, u64 addr,
 				struct addr_location *al)
@@ -985,6 +1006,23 @@ void thread__find_addr_location(struct thread *thread,
 		al->sym = NULL;
 }
 
+void thread__find_addr_location_by_time(struct thread *thread, u8 cpumode,
+					enum map_type type, u64 addr,
+					struct addr_location *al, u64 timestamp)
+{
+	if (perf_has_index)
+		thread__find_addr_map_by_time(thread, cpumode, type, addr, al,
+					      timestamp);
+	else
+		thread__find_addr_map(thread, cpumode, type, addr, al);
+
+	if (al->map != NULL)
+		al->sym = map__find_symbol(al->map, al->addr,
+					   thread->mg->machine->symbol_filter);
+	else
+		al->sym = NULL;
+}
+
 /*
  * Callers need to drop the reference to al->thread, obtained in
  * machine__findnew_thread()
@@ -1014,7 +1052,9 @@ int perf_event__preprocess_sample(const union perf_event *event,
 	    machine__kernel_map(machine) == NULL)
 		machine__create_kernel_maps(machine);
 
-	thread__find_addr_map(thread, cpumode, MAP__FUNCTION, sample->ip, al);
+	thread__find_addr_map_by_time(thread, cpumode, MAP__FUNCTION,
+				      sample->ip, al, sample->time);
+
 	dump_printf(" ...... dso: %s\n",
 		    al->map ? al->map->dso->long_name :
 			al->level == 'H' ? "[hypervisor]" : "<not found>");
@@ -1097,10 +1137,11 @@ void perf_event__preprocess_sample_addr(union perf_event *event,
 {
 	u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
 
-	thread__find_addr_map(thread, cpumode, MAP__FUNCTION, sample->addr, al);
+	thread__find_addr_map_by_time(thread, cpumode, MAP__FUNCTION,
+				      sample->addr, al, sample->time);
 	if (!al->map)
-		thread__find_addr_map(thread, cpumode, MAP__VARIABLE,
-				      sample->addr, al);
+		thread__find_addr_map_by_time(thread, cpumode, MAP__VARIABLE,
+					      sample->addr, al, sample->time);
 
 	al->cpu = sample->cpu;
 	al->sym = NULL;
diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
index 3373e8455945..d5e5b9de54b0 100644
--- a/tools/perf/util/machine.c
+++ b/tools/perf/util/machine.c
@@ -1688,7 +1688,7 @@ static bool symbol__match_regex(struct symbol *sym, regex_t *regex)
 
 static void ip__resolve_ams(struct thread *thread,
 			    struct addr_map_symbol *ams,
-			    u64 ip)
+			    u64 ip, u64 timestamp)
 {
 	struct addr_location al;
 
@@ -1700,7 +1700,8 @@ static void ip__resolve_ams(struct thread *thread,
 	 * Thus, we have to try consecutively until we find a match
 	 * or else, the symbol is unknown
 	 */
-	thread__find_cpumode_addr_location(thread, MAP__FUNCTION, ip, &al);
+	thread__find_cpumode_addr_location_by_time(thread, MAP__FUNCTION,
+						   ip, &al, timestamp);
 
 	ams->addr = ip;
 	ams->al_addr = al.addr;
@@ -1708,21 +1709,25 @@ static void ip__resolve_ams(struct thread *thread,
 	ams->map = al.map;
 }
 
-static void ip__resolve_data(struct thread *thread,
-			     u8 m, struct addr_map_symbol *ams, u64 addr)
+static void ip__resolve_data(struct thread *thread, u8 m,
+			     struct addr_map_symbol *ams,
+			     u64 addr, u64 timestamp)
 {
 	struct addr_location al;
 
 	memset(&al, 0, sizeof(al));
 
-	thread__find_addr_location(thread, m, MAP__VARIABLE, addr, &al);
+	thread__find_addr_location_by_time(thread, m, MAP__VARIABLE,
+					   addr, &al, timestamp);
+
 	if (al.map == NULL) {
 		/*
 		 * some shared data regions have execute bit set which puts
 		 * their mapping in the MAP__FUNCTION type array.
 		 * Check there as a fallback option before dropping the sample.
 		 */
-		thread__find_addr_location(thread, m, MAP__FUNCTION, addr, &al);
+		thread__find_addr_location_by_time(thread, m, MAP__FUNCTION,
+						   addr, &al, timestamp);
 	}
 
 	ams->addr = addr;
@@ -1739,8 +1744,9 @@ struct mem_info *sample__resolve_mem(struct perf_sample *sample,
 	if (!mi)
 		return NULL;
 
-	ip__resolve_ams(al->thread, &mi->iaddr, sample->ip);
-	ip__resolve_data(al->thread, al->cpumode, &mi->daddr, sample->addr);
+	ip__resolve_ams(al->thread, &mi->iaddr, sample->ip, sample->time);
+	ip__resolve_data(al->thread, al->cpumode, &mi->daddr, sample->addr,
+			 sample->time);
 	mi->data_src.val = sample->data_src;
 
 	return mi;
@@ -1814,8 +1820,10 @@ struct branch_info *sample__resolve_bstack(struct perf_sample *sample,
 		return NULL;
 
 	for (i = 0; i < bs->nr; i++) {
-		ip__resolve_ams(al->thread, &bi[i].to, bs->entries[i].to);
-		ip__resolve_ams(al->thread, &bi[i].from, bs->entries[i].from);
+		ip__resolve_ams(al->thread, &bi[i].to,
+				bs->entries[i].to, sample->time);
+		ip__resolve_ams(al->thread, &bi[i].from,
+				bs->entries[i].from, sample->time);
 		bi[i].flags = bs->entries[i].flags;
 	}
 	return bi;
diff --git a/tools/perf/util/session.h b/tools/perf/util/session.h
index 3e900c0efc73..1dd864e983d2 100644
--- a/tools/perf/util/session.h
+++ b/tools/perf/util/session.h
@@ -138,4 +138,5 @@ int perf_event__synthesize_id_index(struct perf_tool *tool,
 				    struct perf_evlist *evlist,
 				    struct machine *machine);
 
+
 #endif /* __PERF_SESSION_H */
diff --git a/tools/perf/util/thread.c b/tools/perf/util/thread.c
index 33de8b010282..efd510d5d966 100644
--- a/tools/perf/util/thread.c
+++ b/tools/perf/util/thread.c
@@ -400,3 +400,29 @@ void thread__find_cpumode_addr_location(struct thread *thread,
 			break;
 	}
 }
+
+void thread__find_cpumode_addr_location_by_time(struct thread *thread,
+						enum map_type type, u64 addr,
+						struct addr_location *al,
+						u64 timestamp)
+{
+	size_t i;
+	const u8 const cpumodes[] = {
+		PERF_RECORD_MISC_USER,
+		PERF_RECORD_MISC_KERNEL,
+		PERF_RECORD_MISC_GUEST_USER,
+		PERF_RECORD_MISC_GUEST_KERNEL
+	};
+
+	if (!perf_has_index) {
+		thread__find_cpumode_addr_location(thread, type, addr, al);
+		return;
+	}
+
+	for (i = 0; i < ARRAY_SIZE(cpumodes); i++) {
+		thread__find_addr_location_by_time(thread, cpumodes[i], type,
+						   addr, al, timestamp);
+		if (al->map)
+			break;
+	}
+}
diff --git a/tools/perf/util/thread.h b/tools/perf/util/thread.h
index c8463d08a6dd..8815ac7bba3c 100644
--- a/tools/perf/util/thread.h
+++ b/tools/perf/util/thread.h
@@ -81,14 +81,25 @@ size_t thread__fprintf(struct thread *thread, FILE *fp);
 void thread__find_addr_map(struct thread *thread,
 			   u8 cpumode, enum map_type type, u64 addr,
 			   struct addr_location *al);
+void thread__find_addr_map_by_time(struct thread *thread, u8 cpumode,
+				   enum map_type type, u64 addr,
+				   struct addr_location *al, u64 timestamp);
 
 void thread__find_addr_location(struct thread *thread,
 				u8 cpumode, enum map_type type, u64 addr,
 				struct addr_location *al);
+void thread__find_addr_location_by_time(struct thread *thread, u8 cpumode,
+					enum map_type type, u64 addr,
+					struct addr_location *al,
+					u64 timestamp);
 
 void thread__find_cpumode_addr_location(struct thread *thread,
 					enum map_type type, u64 addr,
 					struct addr_location *al);
+void thread__find_cpumode_addr_location_by_time(struct thread *thread,
+						enum map_type type, u64 addr,
+						struct addr_location *al,
+						u64 timestamp);
 
 static inline void *thread__priv(struct thread *thread)
 {
-- 
2.6.0