fdtrack: add a test.
Test: logcat -c; fdtrack_test; logcat -d | grep fdtrack
Change-Id: Ie1101c9cf968299ec1f03f20097a2ed27f6e15bd
diff --git a/libfdtrack/fdtrack_test.cpp b/libfdtrack/fdtrack_test.cpp
new file mode 100644
index 0000000..0edf0b8
--- /dev/null
+++ b/libfdtrack/fdtrack_test.cpp
@@ -0,0 +1,111 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <dlfcn.h>
+#include <err.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <unistd.h>
+
+#include <map>
+#include <vector>
+
+#include <gtest/gtest.h>
+
+struct FdtrackFrame {
+ const char* function_name;
+ uint64_t function_offset;
+};
+
+std::map<int, std::vector<FdtrackFrame>> RunFdtrack(std::function<void()> f) {
+ void* libfdtrack = dlopen("libfdtrack.so", RTLD_NOW);
+ if (!libfdtrack) {
+ errx(1, "failed to dlopen libfdtrack.so: %s", dlerror());
+ }
+
+ using fdtrack_callback_t = bool (*)(int fd, const char* const* function_names,
+ const uint64_t* function_offsets, size_t count, void* arg);
+ auto fdtrack_iterate = reinterpret_cast<void (*)(fdtrack_callback_t, void* arg)>(
+ dlsym(libfdtrack, "fdtrack_iterate"));
+ if (!fdtrack_iterate) {
+ errx(1, "failed to dlsym fdtrack_iterate");
+ }
+
+ f();
+
+ std::map<int, std::vector<FdtrackFrame>> result;
+ fdtrack_iterate(
+ [](int fd, const char* const* function_names, const uint64_t* function_offsets, size_t count,
+ void* arg) {
+ auto& map = *static_cast<decltype(result)*>(arg);
+ for (size_t i = 0; i < count; ++i) {
+ map[fd].push_back(FdtrackFrame{
+ .function_name = function_names[i],
+ .function_offset = function_offsets[i],
+ });
+ }
+
+ return true;
+ },
+ &result);
+
+ return result;
+}
+
+TEST(fdtrack, open) {
+ static int fd = -1;
+ auto result = RunFdtrack([]() { fd = open("/dev/null", O_RDONLY | O_CLOEXEC); });
+
+ ASSERT_NE(-1, fd);
+ ASSERT_EQ(1, result.size());
+ ASSERT_EQ(fd, result.begin()->first);
+ ASSERT_NE(nullptr, strstr(result.begin()->second.at(0).function_name, "open"));
+}
+
+TEST(fdtrack, close) {
+ static int fd1 = -1;
+ static int fd2 = -1;
+ static int fd3 = -1;
+ auto result = RunFdtrack([]() {
+ fd1 = open("/dev/null", O_RDONLY | O_CLOEXEC);
+ fd2 = open("/dev/null", O_RDONLY | O_CLOEXEC);
+ fd3 = open("/dev/null", O_RDONLY | O_CLOEXEC);
+ close(fd2);
+ });
+
+ ASSERT_NE(-1, fd1);
+ ASSERT_NE(-1, fd2);
+ ASSERT_NE(-1, fd3);
+
+ ASSERT_EQ(2, result.size());
+ ASSERT_EQ(1, result.count(fd1));
+ ASSERT_EQ(1, result.count(fd3));
+
+ ASSERT_NE(nullptr, strstr(result[fd1].at(0).function_name, "open"));
+ ASSERT_NE(nullptr, strstr(result[fd3].at(0).function_name, "open"));
+}