[RFC/PATCH 20/38] perf tools: Add a test case for timed map groups handling

[Namhyung Kim <namhyung@kernel.org>]

A test case for verifying thread->mg and ->mg_list handling during
time change and new thread__find_addr_map_by_time() and friends.

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
---
 tools/perf/tests/Build            |  1 +
 tools/perf/tests/builtin-test.c   |  4 ++
 tools/perf/tests/tests.h          |  1 +
 tools/perf/tests/thread-mg-time.c | 93 +++++++++++++++++++++++++++++++++++++++
 4 files changed, 99 insertions(+)
 create mode 100644 tools/perf/tests/thread-mg-time.c

diff --git a/tools/perf/tests/Build b/tools/perf/tests/Build
index fd4cabb9a1a0..d287b99ff3bb 100644
--- a/tools/perf/tests/Build
+++ b/tools/perf/tests/Build
@@ -27,6 +27,7 @@ perf-y += mmap-thread-lookup.o
 perf-y += thread-comm.o
 perf-y += thread-mg-share.o
 perf-y += thread-lookup-time.o
+perf-y += thread-mg-time.o
 perf-y += switch-tracking.o
 perf-y += keep-tracking.o
 perf-y += code-reading.o
diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c
index 027796fa105e..62de08a89e0e 100644
--- a/tools/perf/tests/builtin-test.c
+++ b/tools/perf/tests/builtin-test.c
@@ -199,6 +199,10 @@ static struct test {
 		.func = test__thread_lookup_time,
 	},
 	{
+		.desc = "Test thread map group handling with time",
+		.func = test__thread_mg_time,
+	},
+	{
 		.func = NULL,
 	},
 };
diff --git a/tools/perf/tests/tests.h b/tools/perf/tests/tests.h
index 9c02755e86dd..03dcaccb570f 100644
--- a/tools/perf/tests/tests.h
+++ b/tools/perf/tests/tests.h
@@ -67,6 +67,7 @@ int test__insn_x86(void);
 int test_session_topology(void);
 int test__thread_comm(void);
 int test__thread_lookup_time(void);
+int test__thread_mg_time(void);
 
 #if defined(__x86_64__) || defined(__i386__) || defined(__arm__) || defined(__aarch64__)
 #ifdef HAVE_DWARF_UNWIND_SUPPORT
diff --git a/tools/perf/tests/thread-mg-time.c b/tools/perf/tests/thread-mg-time.c
new file mode 100644
index 000000000000..841777125a64
--- /dev/null
+++ b/tools/perf/tests/thread-mg-time.c
@@ -0,0 +1,93 @@
+#include "tests.h"
+#include "machine.h"
+#include "thread.h"
+#include "map.h"
+#include "debug.h"
+
+#define PERF_MAP_START  0x40000
+
+int test__thread_mg_time(void)
+{
+	struct machines machines;
+	struct machine *machine;
+	struct thread *t;
+	struct map_groups *mg;
+	struct map *map, *old_map;
+	struct addr_location al = { .map = NULL, };
+
+	/*
+	 * This test is to check whether it can retrieve a correct map
+	 * for a given time.  When multi-file data storage is enabled,
+	 * those task/comm/mmap events are processed first so the
+	 * later sample should find a matching comm properly.
+	 */
+	machines__init(&machines);
+	machine = &machines.host;
+
+	/* this is needed to add/find map by time */
+	perf_has_index = true;
+
+	t = machine__findnew_thread(machine, 0, 0);
+	mg = t->mg;
+
+	map = dso__new_map("/usr/bin/perf");
+	map->start = PERF_MAP_START;
+	map->end = PERF_MAP_START + 0x1000;
+
+	thread__insert_map(t, map);
+
+	if (verbose > 1)
+		map_groups__fprintf(t->mg, stderr);
+
+	thread__find_addr_map(t, PERF_RECORD_MISC_USER, MAP__FUNCTION,
+			      PERF_MAP_START, &al);
+
+	TEST_ASSERT_VAL("cannot find mapping for perf", al.map != NULL);
+	TEST_ASSERT_VAL("non matched mapping found", al.map == map);
+	TEST_ASSERT_VAL("incorrect map groups", al.map->groups == mg);
+	TEST_ASSERT_VAL("incorrect map groups", al.map->groups == t->mg);
+
+	thread__find_addr_map_by_time(t, PERF_RECORD_MISC_USER, MAP__FUNCTION,
+				      PERF_MAP_START, &al, -1ULL);
+
+	TEST_ASSERT_VAL("cannot find timed mapping for perf", al.map != NULL);
+	TEST_ASSERT_VAL("non matched timed mapping", al.map == map);
+	TEST_ASSERT_VAL("incorrect timed map groups", al.map->groups == mg);
+	TEST_ASSERT_VAL("incorrect map groups", al.map->groups == t->mg);
+
+
+	pr_debug("simulate EXEC event (generate new mg)\n");
+	__thread__set_comm(t, "perf-test", 10000, true);
+
+	old_map = map;
+
+	map = dso__new_map("/usr/bin/perf-test");
+	map->start = PERF_MAP_START;
+	map->end = PERF_MAP_START + 0x2000;
+
+	thread__insert_map(t, map);
+
+	if (verbose > 1)
+		map_groups__fprintf(t->mg, stderr);
+
+	thread__find_addr_map(t, PERF_RECORD_MISC_USER, MAP__FUNCTION,
+			      PERF_MAP_START + 4, &al);
+
+	TEST_ASSERT_VAL("cannot find mapping for perf-test", al.map != NULL);
+	TEST_ASSERT_VAL("invalid mapping found", al.map == map);
+	TEST_ASSERT_VAL("incorrect map groups", al.map->groups != mg);
+	TEST_ASSERT_VAL("incorrect map groups", al.map->groups == t->mg);
+
+	pr_debug("searching map in the old mag groups\n");
+	thread__find_addr_map_by_time(t, PERF_RECORD_MISC_USER, MAP__FUNCTION,
+				      PERF_MAP_START, &al, 5000);
+
+	TEST_ASSERT_VAL("cannot find timed mapping for perf-test", al.map != NULL);
+	TEST_ASSERT_VAL("non matched timed mapping", al.map == old_map);
+	TEST_ASSERT_VAL("incorrect timed map groups", al.map->groups == mg);
+	TEST_ASSERT_VAL("incorrect map groups", al.map->groups != t->mg);
+
+	machine__delete_threads(machine);
+	machines__exit(&machines);
+	return 0;
+}
-- 
2.6.0