1 files changed, 150 insertions, 0 deletions
diff --git a/tools/perf/tests/symbols.c b/tools/perf/tests/symbols.c
new file mode 100644
index 000000000000..057b16df6416
--- /dev/null
+++ b/tools/perf/tests/symbols.c
@@ -0,0 +1,150 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/compiler.h>
+#include <linux/string.h>
+#include <sys/mman.h>
+#include <limits.h>
+#include "debug.h"
+#include "dso.h"
+#include "machine.h"
+#include "thread.h"
+#include "symbol.h"
+#include "map.h"
+#include "util.h"
+#include "tests.h"
+
+struct test_info {
+	struct machine *machine;
+	struct thread *thread;
+};
+
+static int init_test_info(struct test_info *ti)
+{
+	ti->machine = machine__new_host();
+	if (!ti->machine) {
+		pr_debug("machine__new_host() failed!\n");
+		return TEST_FAIL;
+	}
+
+	/* Create a dummy thread */
+	ti->thread = machine__findnew_thread(ti->machine, 100, 100);
+	if (!ti->thread) {
+		pr_debug("machine__findnew_thread() failed!\n");
+		return TEST_FAIL;
+	}
+
+	return TEST_OK;
+}
+
+static void exit_test_info(struct test_info *ti)
+{
+	thread__put(ti->thread);
+	machine__delete(ti->machine);
+}
+
+static void get_test_dso_filename(char *filename, size_t max_sz)
+{
+	if (dso_to_test)
+		strlcpy(filename, dso_to_test, max_sz);
+	else
+		perf_exe(filename, max_sz);
+}
+
+static int create_map(struct test_info *ti, char *filename, struct map **map_p)
+{
+	/* Create a dummy map at 0x100000 */
+	*map_p = map__new(ti->machine, 0x100000, 0xffffffff, 0, NULL,
+			  PROT_EXEC, 0, NULL, filename, ti->thread);
+	if (!*map_p) {
+		pr_debug("Failed to create map!");
+		return TEST_FAIL;
+	}
+
+	return TEST_OK;
+}
+
+static int test_dso(struct dso *dso)
+{
+	struct symbol *last_sym = NULL;
+	struct rb_node *nd;
+	int ret = TEST_OK;
+
+	/* dso__fprintf() prints all the symbols */
+	if (verbose > 1)
+		dso__fprintf(dso, stderr);
+
+	for (nd = rb_first_cached(&dso->symbols); nd; nd = rb_next(nd)) {
+		struct symbol *sym = rb_entry(nd, struct symbol, rb_node);
+
+		if (sym->type != STT_FUNC && sym->type != STT_GNU_IFUNC)
+			continue;
+
+		/* Check for overlapping function symbols */
+		if (last_sym && sym->start < last_sym->end) {
+			pr_debug("Overlapping symbols:\n");
+			symbol__fprintf(last_sym, stderr);
+			symbol__fprintf(sym, stderr);
+			ret = TEST_FAIL;
+		}
+		/* Check for zero-length function symbol */
+		if (sym->start == sym->end) {
+			pr_debug("Zero-length symbol:\n");
+			symbol__fprintf(sym, stderr);
+			ret = TEST_FAIL;
+		}
+		last_sym = sym;
+	}
+
+	return ret;
+}
+
+static int test_file(struct test_info *ti, char *filename)
+{
+	struct map *map = NULL;
+	int ret, nr;
+
+	pr_debug("Testing %s\n", filename);
+
+	ret = create_map(ti, filename, &map);
+	if (ret != TEST_OK)
+		return ret;
+
+	nr = dso__load(map->dso, map);
+	if (nr < 0) {
+		pr_debug("dso__load() failed!\n");
+		ret = TEST_FAIL;
+		goto out_put;
+	}
+
+	if (nr == 0) {
+		pr_debug("DSO has no symbols!\n");
+		ret = TEST_SKIP;
+		goto out_put;
+	}
+
+	ret = test_dso(map->dso);
+out_put:
+	map__put(map);
+
+	return ret;
+}
+
+static int test__symbols(struct test_suite *test __maybe_unused, int subtest __maybe_unused)
+{
+	char filename[PATH_MAX];
+	struct test_info ti;
+	int ret;
+
+	ret = init_test_info(&ti);
+	if (ret != TEST_OK)
+		return ret;
+
+	get_test_dso_filename(filename, sizeof(filename));
+
+	ret = test_file(&ti, filename);
+
+	exit_test_info(&ti);
+
+	return ret;
+}
+
+DEFINE_SUITE("Symbols", symbols);