bionic: linker-unit-tests: Add crt_pad_segment tests
Test crt_pad_segment note parsing.
Test: atest -c linker-unit-tests
Bug: 316403210
Bug: 300367402
Bug: 307803052
Bug: 312550202
Change-Id: I0a7db8113a8b1df72696906bdd48a6ab6b6715f7
diff --git a/linker/linker_crt_pad_segment_test.cpp b/linker/linker_crt_pad_segment_test.cpp
new file mode 100644
index 0000000..5a219f8
--- /dev/null
+++ b/linker/linker_crt_pad_segment_test.cpp
@@ -0,0 +1,84 @@
+/*
+ * Copyright (C) 2024 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 <android-base/file.h>
+#include <android-base/unique_fd.h>
+
+#include "linker_phdr.h"
+
+#include <gtest/gtest.h>
+
+#include <fcntl.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#include <string>
+
+using ::android::base::GetExecutableDirectory;
+using ::android::base::unique_fd;
+
+namespace {
+
+static std::string GetTestElfPath(const std::string& filename) {
+ static std::string test_data_dir = GetExecutableDirectory();
+
+ return test_data_dir + "/" + filename;
+}
+
+bool GetPadSegment(const std::string& elf_path) {
+ std::string path = GetTestElfPath(elf_path);
+
+ unique_fd fd{TEMP_FAILURE_RETRY(open(path.c_str(), O_CLOEXEC | O_RDWR))};
+ EXPECT_GE(fd.get(), 0) << "Failed to open " << path << ": " << strerror(errno);
+
+ struct stat file_stat;
+ EXPECT_NE(TEMP_FAILURE_RETRY(fstat(fd.get(), &file_stat)), -1)
+ << "Failed to stat " << path << ": " << strerror(errno);
+
+ ElfReader elf_reader;
+ EXPECT_TRUE(elf_reader.Read(path.c_str(), fd.get(), 0, file_stat.st_size))
+ << "Failed to read ELF file";
+
+ return elf_reader.should_pad_segments();
+}
+
+}; // anonymous namespace
+
+TEST(crt_pad_segment, note_absent) {
+ ASSERT_FALSE(GetPadSegment("no_crt_pad_segment.so"));
+}
+
+TEST(crt_pad_segment, note_present_and_enabled) {
+ ASSERT_TRUE(GetPadSegment("crt_pad_segment_enabled.so"));
+}
+
+TEST(crt_pad_segment, note_present_and_disabled) {
+ ASSERT_FALSE(GetPadSegment("crt_pad_segment_disabled.so"));
+}